]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - drivers/scsi/initio.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] qla2xxx: remove unnecessary reads of PCI_CAP_ID_EXP
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / initio.c
CommitLineData
1da177e4
LT		 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>
72d39fea 6 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
fa195afe 7 * Copyright (c) 2007 Red Hat
1da177e4
LT		 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 *
1da177e4
LT		 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
72d39fea 42 * - Set can_queue to initio_num_scb
1da177e4
LT		 43 * 06/25/98 hc - v1.01m
44 * - Get it work for kernel version >= 2.1.75
72d39fea 45 * - Dynamic assign SCSI bus reset holding time in initio_init()
1da177e4
LT		 46 * 07/02/98 hc - v1.01n
47 * - Support 0002134A
48 * 08/07/98 hc - v1.01o
72d39fea 49 * - Change the initio_abort_srb routine to use scsi_done. <01>
1da177e4
LT		 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>
1da177e4
LT		 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>
1da177e4
LT		 95#include <linux/slab.h>
96#include <linux/jiffies.h>
910638ae 97#include <linux/dma-mapping.h>
1da177e4
LT		 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
1da177e4
LT		 113#define I950_DEVICE_ID 0x9500 /* Initio's inic-950 product ID */
114#define I940_DEVICE_ID 0x9400 /* Initio's inic-940 product ID */
115#define I935_DEVICE_ID 0x9401 /* Initio's inic-935 product ID */
116#define I920_DEVICE_ID 0x0002 /* Initio's other product ID */
117
118#ifdef DEBUG_i91u
119static unsigned int i91u_debug = DEBUG_DEFAULT;
120#endif
121
72d39fea 122static int initio_tag_enable = 1;
1da177e4
LT		 123
124#ifdef DEBUG_i91u
125static int setup_debug = 0;
126#endif
127
72d39fea 128static void i91uSCBPost(u8 * pHcb, u8 * pScb);
1da177e4 129
01288732 130/* PCI Devices supported by this driver */
84ad58e4 131static struct pci_device_id i91u_pci_devices[] = {
01288732
BC		 132 { PCI_VENDOR_ID_INIT, I950_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
133 { PCI_VENDOR_ID_INIT, I940_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
134 { PCI_VENDOR_ID_INIT, I935_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
135 { PCI_VENDOR_ID_INIT, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
136 { PCI_VENDOR_ID_DOMEX, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
137 { }
1da177e4 138};
01288732 139MODULE_DEVICE_TABLE(pci, i91u_pci_devices);
1da177e4
LT		 140
141#define DEBUG_INTERRUPT 0
142#define DEBUG_QUEUE 0
143#define DEBUG_STATE 0
144#define INT_DISC 0
145
72d39fea
AC		 146/*--- forward references ---*/
147static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
148static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
149
150static int tulip_main(struct initio_host * host);
151
152static int initio_next_state(struct initio_host * host);
153static int initio_state_1(struct initio_host * host);
154static int initio_state_2(struct initio_host * host);
155static int initio_state_3(struct initio_host * host);
156static int initio_state_4(struct initio_host * host);
157static int initio_state_5(struct initio_host * host);
158static int initio_state_6(struct initio_host * host);
159static int initio_state_7(struct initio_host * host);
160static int initio_xfer_data_in(struct initio_host * host);
161static int initio_xfer_data_out(struct initio_host * host);
162static int initio_xpad_in(struct initio_host * host);
163static int initio_xpad_out(struct initio_host * host);
164static int initio_status_msg(struct initio_host * host);
165
166static int initio_msgin(struct initio_host * host);
167static int initio_msgin_sync(struct initio_host * host);
168static int initio_msgin_accept(struct initio_host * host);
169static int initio_msgout_reject(struct initio_host * host);
170static int initio_msgin_extend(struct initio_host * host);
171
172static int initio_msgout_ide(struct initio_host * host);
173static int initio_msgout_abort_targ(struct initio_host * host);
174static int initio_msgout_abort_tag(struct initio_host * host);
175
176static int initio_bus_device_reset(struct initio_host * host);
177static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
178static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
179static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
180static int int_initio_busfree(struct initio_host * host);
181static int int_initio_scsi_rst(struct initio_host * host);
182static int int_initio_bad_seq(struct initio_host * host);
183static int int_initio_resel(struct initio_host * host);
184static int initio_sync_done(struct initio_host * host);
185static int wdtr_done(struct initio_host * host);
186static int wait_tulip(struct initio_host * host);
187static int initio_wait_done_disc(struct initio_host * host);
188static int initio_wait_disc(struct initio_host * host);
189static void tulip_scsi(struct initio_host * host);
190static int initio_post_scsi_rst(struct initio_host * host);
191
192static void initio_se2_ew_en(unsigned long base);
193static void initio_se2_ew_ds(unsigned long base);
194static int initio_se2_rd_all(unsigned long base);
195static void initio_se2_update_all(unsigned long base); /* setup default pattern */
196static void initio_read_eeprom(unsigned long base);
197
198/* ---- INTERNAL VARIABLES ---- */
199
1da177e4
LT		 200static NVRAM i91unvram;
201static NVRAM *i91unvramp;
202
72d39fea 203static u8 i91udftNvRam[64] =
1da177e4 204{
72d39fea 205 /*----------- header -----------*/
1da177e4
LT		 206 0x25, 0xc9, /* Signature */
207 0x40, /* Size */
208 0x01, /* Revision */
209 /* -- Host Adapter Structure -- */
210 0x95, /* ModelByte0 */
211 0x00, /* ModelByte1 */
212 0x00, /* ModelInfo */
213 0x01, /* NumOfCh */
214 NBC1_DEFAULT, /* BIOSConfig1 */
215 0, /* BIOSConfig2 */
216 0, /* HAConfig1 */
217 0, /* HAConfig2 */
218 /* SCSI channel 0 and target Structure */
219 7, /* SCSIid */
220 NCC1_DEFAULT, /* SCSIconfig1 */
221 0, /* SCSIconfig2 */
222 0x10, /* NumSCSItarget */
223
224 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
225 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
226 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
227 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
228
229 /* SCSI channel 1 and target Structure */
230 7, /* SCSIid */
231 NCC1_DEFAULT, /* SCSIconfig1 */
232 0, /* SCSIconfig2 */
233 0x10, /* NumSCSItarget */
234
235 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
236 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
237 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
238 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
240 0, 0}; /* - CheckSum - */
241
242
72d39fea 243static u8 initio_rate_tbl[8] = /* fast 20 */
1da177e4 244{
25985edc 245 /* nanosecond divide by 4 */
1da177e4
LT		 246 12, /* 50ns, 20M */
247 18, /* 75ns, 13.3M */
248 25, /* 100ns, 10M */
249 31, /* 125ns, 8M */
250 37, /* 150ns, 6.6M */
251 43, /* 175ns, 5.7M */
252 50, /* 200ns, 5M */
253 62 /* 250ns, 4M */
254};
255
72d39fea
AC		 256static void initio_do_pause(unsigned amount)
257{
258 /* Pause for amount jiffies */
1da177e4
LT		 259 unsigned long the_time = jiffies + amount;
260
72d39fea
AC		 261 while (time_before_eq(jiffies, the_time))
262 cpu_relax();
1da177e4
LT		 263}
264
265/*-- forward reference --*/
266
1da177e4
LT		 267/******************************************************************
268 Input: instruction for Serial E2PROM
269
270 EX: se2_rd(0 call se2_instr() to send address and read command
271
272 StartBit OP_Code Address Data
273 --------- -------- ------------------ -------
274 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
275
276 +-----------------------------------------------------
277 |
278 CS -----+
279 +--+ +--+ +--+ +--+ +--+
280 ^ | ^ | ^ | ^ | ^ |
281 | | | | | | | | | |
282 CLK -------+ +--+ +--+ +--+ +--+ +--
283 (leading edge trigger)
284
285 +--1-----1--+
286 | SB OP | OP A5 A4
287 DI ----+ +--0------------------
288 (address and cmd sent to nvram)
289
290 -------------------------------------------+
291 |
292 DO +---
293 (data sent from nvram)
294
295
296******************************************************************/
72d39fea
AC		 297
298/**
299 * initio_se2_instr - bitbang an instruction
300 * @base: Base of InitIO controller
301 * @instr: Instruction for serial E2PROM
302 *
303 * Bitbang an instruction out to the serial E2Prom
304 */
305
306static void initio_se2_instr(unsigned long base, u8 instr)
1da177e4
LT		 307{
308 int i;
72d39fea 309 u8 b;
1da177e4 310
72d39fea
AC		 311 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
312 udelay(30);
313 outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
314 udelay(30);
1da177e4
LT		 315
316 for (i = 0; i < 8; i++) {
317 if (instr & 0x80)
72d39fea 318 b = SE2CS | SE2DO; /* -CLK+dataBit */
1da177e4 319 else
72d39fea
AC		 320 b = SE2CS; /* -CLK */
321 outb(b, base + TUL_NVRAM);
322 udelay(30);
323 outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
324 udelay(30);
1da177e4
LT		 325 instr <<= 1;
326 }
72d39fea
AC		 327 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
328 udelay(30);
1da177e4
LT		 329}
330
331
72d39fea
AC		 332/**
333 * initio_se2_ew_en - Enable erase/write
334 * @base: Base address of InitIO controller
335 *
336 * Enable erase/write state of serial EEPROM
337 */
338void initio_se2_ew_en(unsigned long base)
1da177e4 339{
72d39fea
AC		 340 initio_se2_instr(base, 0x30); /* EWEN */
341 outb(0, base + TUL_NVRAM); /* -CS */
342 udelay(30);
1da177e4
LT		 343}
344
345
72d39fea
AC		 346/**
347 * initio_se2_ew_ds - Disable erase/write
348 * @base: Base address of InitIO controller
349 *
350 * Disable erase/write state of serial EEPROM
351 */
352void initio_se2_ew_ds(unsigned long base)
1da177e4 353{
72d39fea
AC		 354 initio_se2_instr(base, 0); /* EWDS */
355 outb(0, base + TUL_NVRAM); /* -CS */
356 udelay(30);
1da177e4
LT		 357}
358
359
72d39fea
AC		 360/**
361 * initio_se2_rd - read E2PROM word
362 * @base: Base of InitIO controller
363 * @addr: Address of word in E2PROM
364 *
365 * Read a word from the NV E2PROM device
366 */
367static u16 initio_se2_rd(unsigned long base, u8 addr)
1da177e4 368{
72d39fea
AC		 369 u8 instr, rb;
370 u16 val = 0;
1da177e4
LT		 371 int i;
372
72d39fea
AC		 373 instr = (u8) (addr | 0x80);
374 initio_se2_instr(base, instr); /* READ INSTR */
1da177e4
LT		 375
376 for (i = 15; i >= 0; i--) {
72d39fea
AC		 377 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
378 udelay(30);
379 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
1da177e4
LT		 380
381 /* sample data after the following edge of clock */
72d39fea
AC		 382 rb = inb(base + TUL_NVRAM);
383 rb &= SE2DI;
384 val += (rb << i);
385 udelay(30); /* 6/20/95 */
1da177e4
LT		 386 }
387
72d39fea
AC		 388 outb(0, base + TUL_NVRAM); /* no chip select */
389 udelay(30);
390 return val;
1da177e4
LT		 391}
392
72d39fea
AC		 393/**
394 * initio_se2_wr - read E2PROM word
395 * @base: Base of InitIO controller
396 * @addr: Address of word in E2PROM
397 * @val: Value to write
398 *
399 * Write a word to the NV E2PROM device. Used when recovering from
400 * a problem with the NV.
401 */
402static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
1da177e4 403{
72d39fea
AC		 404 u8 rb;
405 u8 instr;
1da177e4
LT		 406 int i;
407
72d39fea
AC		 408 instr = (u8) (addr | 0x40);
409 initio_se2_instr(base, instr); /* WRITE INSTR */
1da177e4 410 for (i = 15; i >= 0; i--) {
72d39fea
AC		 411 if (val & 0x8000)
412 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
1da177e4 413 else
72d39fea
AC		 414 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
415 udelay(30);
416 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
417 udelay(30);
418 val <<= 1;
1da177e4 419 }
72d39fea
AC		 420 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
421 udelay(30);
422 outb(0, base + TUL_NVRAM); /* -CS */
423 udelay(30);
1da177e4 424
72d39fea
AC		 425 outb(SE2CS, base + TUL_NVRAM); /* +CS */
426 udelay(30);
1da177e4
LT		 427
428 for (;;) {
72d39fea
AC		 429 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
430 udelay(30);
431 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
432 udelay(30);
433 if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
1da177e4
LT		 434 break; /* write complete */
435 }
72d39fea 436 outb(0, base + TUL_NVRAM); /* -CS */
1da177e4
LT		 437}
438
72d39fea
AC		 439/**
440 * initio_se2_rd_all - read hostadapter NV configuration
441 * @base: Base address of InitIO controller
442 *
443 * Reads the E2PROM data into main memory. Ensures that the checksum
444 * and header marker are valid. Returns 1 on success -1 on error.
445 */
1da177e4 446
72d39fea 447static int initio_se2_rd_all(unsigned long base)
1da177e4
LT		 448{
449 int i;
72d39fea
AC		 450 u16 chksum = 0;
451 u16 *np;
1da177e4
LT		 452
453 i91unvramp = &i91unvram;
72d39fea
AC		 454 np = (u16 *) i91unvramp;
455 for (i = 0; i < 32; i++)
456 *np++ = initio_se2_rd(base, i);
1da177e4 457
72d39fea 458 /* Is signature "ini" ok ? */
1da177e4
LT		 459 if (i91unvramp->NVM_Signature != INI_SIGNATURE)
460 return -1;
72d39fea
AC		 461 /* Is ckecksum ok ? */
462 np = (u16 *) i91unvramp;
1da177e4
LT		 463 for (i = 0; i < 31; i++)
464 chksum += *np++;
72d39fea 465 if (i91unvramp->NVM_CheckSum != chksum)
1da177e4
LT		 466 return -1;
467 return 1;
468}
469
72d39fea
AC		 470/**
471 * initio_se2_update_all - Update E2PROM
472 * @base: Base of InitIO controller
473 *
474 * Update the E2PROM by wrting any changes into the E2PROM
475 * chip, rewriting the checksum.
476 */
477static void initio_se2_update_all(unsigned long base)
1da177e4
LT		 478{ /* setup default pattern */
479 int i;
72d39fea
AC		 480 u16 chksum = 0;
481 u16 *np, *np1;
1da177e4
LT		 482
483 i91unvramp = &i91unvram;
484 /* Calculate checksum first */
72d39fea 485 np = (u16 *) i91udftNvRam;
1da177e4
LT		 486 for (i = 0; i < 31; i++)
487 chksum += *np++;
72d39fea
AC		 488 *np = chksum;
489 initio_se2_ew_en(base); /* Enable write */
1da177e4 490
72d39fea
AC		 491 np = (u16 *) i91udftNvRam;
492 np1 = (u16 *) i91unvramp;
1da177e4 493 for (i = 0; i < 32; i++, np++, np1++) {
72d39fea
AC		 494 if (*np != *np1)
495 initio_se2_wr(base, i, *np);
1da177e4 496 }
72d39fea 497 initio_se2_ew_ds(base); /* Disable write */
1da177e4
LT		 498}
499
72d39fea
AC		 500/**
501 * initio_read_eeprom - Retrieve configuration
502 * @base: Base of InitIO Host Adapter
503 *
504 * Retrieve the host adapter configuration data from E2Prom. If the
505 * data is invalid then the defaults are used and are also restored
506 * into the E2PROM. This forms the access point for the SCSI driver
507 * into the E2PROM layer, the other functions for the E2PROM are all
508 * internal use.
509 *
510 * Must be called single threaded, uses a shared global area.
511 */
1da177e4 512
72d39fea 513static void initio_read_eeprom(unsigned long base)
1da177e4 514{
72d39fea 515 u8 gctrl;
1da177e4 516
72d39fea
AC		 517 i91unvramp = &i91unvram;
518 /* Enable EEProm programming */
519 gctrl = inb(base + TUL_GCTRL);
520 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
521 if (initio_se2_rd_all(base) != 1) {
522 initio_se2_update_all(base); /* setup default pattern */
523 initio_se2_rd_all(base); /* load again */
1da177e4 524 }
72d39fea
AC		 525 /* Disable EEProm programming */
526 gctrl = inb(base + TUL_GCTRL);
527 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
1da177e4
LT		 528}
529
72d39fea
AC		 530/**
531 * initio_stop_bm - stop bus master
532 * @host: InitIO we are stopping
533 *
3ad2f3fb 534 * Stop any pending DMA operation, aborting the DMA if necessary
72d39fea 535 */
1da177e4 536
72d39fea 537static void initio_stop_bm(struct initio_host * host)
1da177e4
LT		 538{
539
72d39fea
AC		 540 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
541 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1da177e4 542 /* wait Abort DMA xfer done */
72d39fea
AC		 543 while ((inb(host->addr + TUL_Int) & XABT) == 0)
544 cpu_relax();
1da177e4 545 }
72d39fea 546 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1da177e4
LT		 547}
548
72d39fea
AC		 549/**
550 * initio_reset_scsi - Reset SCSI host controller
551 * @host: InitIO host to reset
552 * @seconds: Recovery time
553 *
554 * Perform a full reset of the SCSI subsystem.
555 */
1da177e4 556
72d39fea 557static int initio_reset_scsi(struct initio_host * host, int seconds)
1da177e4 558{
72d39fea 559 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
1da177e4 560
72d39fea
AC		 561 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
562 cpu_relax();
1da177e4 563
72d39fea
AC		 564 /* reset tulip chip */
565 outb(0, host->addr + TUL_SSignal);
1da177e4
LT		 566
567 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
568 /* SONY 5200 tape drive won't work if only stall for 1 sec */
72d39fea
AC		 569 /* FIXME: this is a very long busy wait right now */
570 initio_do_pause(seconds * HZ);
1da177e4 571
72d39fea
AC		 572 inb(host->addr + TUL_SInt);
573 return SCSI_RESET_SUCCESS;
1da177e4
LT		 574}
575
72d39fea
AC		 576/**
577 * initio_init - set up an InitIO host adapter
578 * @host: InitIO host adapter
579 * @num_scbs: Number of SCBS
580 * @bios_addr: BIOS address
581 *
582 * Set up the host adapter and devices according to the configuration
583 * retrieved from the E2PROM.
584 *
585 * Locking: Calls E2PROM layer code which is not re-enterable so must
586 * run single threaded for now.
587 */
588
589static void initio_init(struct initio_host * host, u8 *bios_addr)
1da177e4
LT		 590{
591 int i;
72d39fea
AC		 592 u8 *flags;
593 u8 *heads;
594
595 /* Get E2Prom configuration */
596 initio_read_eeprom(host->addr);
1da177e4 597 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
72d39fea 598 host->max_tar = 8;
1da177e4 599 else
72d39fea 600 host->max_tar = 16;
1da177e4 601
72d39fea 602 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
1da177e4 603
72d39fea
AC		 604 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
605 host->idmask = ~(1 << host->scsi_id);
1da177e4 606
44456d37 607#ifdef CHK_PARITY
1da177e4 608 /* Enable parity error response */
72d39fea 609 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
1da177e4
LT		 610#endif
611
612 /* Mask all the interrupt */
72d39fea 613 outb(0x1F, host->addr + TUL_Mask);
1da177e4 614
72d39fea 615 initio_stop_bm(host);
1da177e4 616 /* --- Initialize the tulip --- */
72d39fea 617 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
1da177e4
LT		 618
619 /* program HBA's SCSI ID */
72d39fea 620 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
1da177e4
LT		 621
622 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
623 disable SCSI reset */
72d39fea
AC		 624 if (host->config & HCC_EN_PAR)
625 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
1da177e4 626 else
72d39fea
AC		 627 host->sconf1 = (TSC_INITDEFAULT);
628 outb(host->sconf1, host->addr + TUL_SConfig);
1da177e4 629
72d39fea
AC		 630 /* Enable HW reselect */
631 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1da177e4 632
72d39fea 633 outb(0, host->addr + TUL_SPeriod);
1da177e4
LT		 634
635 /* selection time out = 250 ms */
72d39fea 636 outb(153, host->addr + TUL_STimeOut);
1da177e4 637
72d39fea
AC		 638 /* Enable SCSI terminator */
639 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
640 host->addr + TUL_XCtrl);
641 outb(((host->config & HCC_AUTO_TERM) >> 4) |
642 (inb(host->addr + TUL_GCTRL1) & 0xFE),
643 host->addr + TUL_GCTRL1);
1da177e4
LT		 644
645 for (i = 0,
72d39fea
AC		 646 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
647 heads = bios_addr + 0x180;
648 i < host->max_tar;
649 i++, flags++) {
650 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
651 if (host->targets[i].flags & TCF_EN_255)
652 host->targets[i].drv_flags = TCF_DRV_255_63;
1da177e4 653 else
72d39fea
AC		 654 host->targets[i].drv_flags = 0;
655 host->targets[i].js_period = 0;
656 host->targets[i].sconfig0 = host->sconf1;
657 host->targets[i].heads = *heads++;
658 if (host->targets[i].heads == 255)
659 host->targets[i].drv_flags = TCF_DRV_255_63;
1da177e4 660 else
72d39fea
AC		 661 host->targets[i].drv_flags = 0;
662 host->targets[i].sectors = *heads++;
663 host->targets[i].flags &= ~TCF_BUSY;
664 host->act_tags[i] = 0;
665 host->max_tags[i] = 0xFF;
1da177e4
LT		 666 } /* for */
667 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
e9e42faf 668 host->addr, host->pci_dev->irq,
72d39fea
AC		 669 host->bios_addr, host->scsi_id);
670 /* Reset SCSI Bus */
671 if (host->config & HCC_SCSI_RESET) {
672 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
673 initio_reset_scsi(host, 10);
1da177e4 674 }
72d39fea
AC		 675 outb(0x17, host->addr + TUL_SCFG1);
676 outb(0xE9, host->addr + TUL_SIntEnable);
1da177e4
LT		 677}
678
72d39fea
AC		 679/**
680 * initio_alloc_scb - Allocate an SCB
681 * @host: InitIO host we are allocating for
682 *
683 * Walk the SCB list for the controller and allocate a free SCB if
684 * one exists.
685 */
686static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
1da177e4 687{
72d39fea
AC		 688 struct scsi_ctrl_blk *scb;
689 unsigned long flags;
690
691 spin_lock_irqsave(&host->avail_lock, flags);
692 if ((scb = host->first_avail) != NULL) {
1da177e4 693#if DEBUG_QUEUE
72d39fea 694 printk("find scb at %p\n", scb);
1da177e4 695#endif
72d39fea
AC		 696 if ((host->first_avail = scb->next) == NULL)
697 host->last_avail = NULL;
698 scb->next = NULL;
699 scb->status = SCB_RENT;
1da177e4 700 }
72d39fea
AC		 701 spin_unlock_irqrestore(&host->avail_lock, flags);
702 return scb;
1da177e4
LT		 703}
704
72d39fea
AC		 705/**
706 * initio_release_scb - Release an SCB
707 * @host: InitIO host that owns the SCB
708 * @cmnd: SCB command block being returned
709 *
710 * Return an allocated SCB to the host free list
711 */
712
713static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
1da177e4 714{
72d39fea 715 unsigned long flags;
1da177e4
LT		 716
717#if DEBUG_QUEUE
72d39fea 718 printk("Release SCB %p; ", cmnd);
1da177e4 719#endif
72d39fea
AC		 720 spin_lock_irqsave(&(host->avail_lock), flags);
721 cmnd->srb = NULL;
722 cmnd->status = 0;
723 cmnd->next = NULL;
724 if (host->last_avail != NULL) {
725 host->last_avail->next = cmnd;
726 host->last_avail = cmnd;
1da177e4 727 } else {
72d39fea
AC		 728 host->first_avail = cmnd;
729 host->last_avail = cmnd;
1da177e4 730 }
72d39fea 731 spin_unlock_irqrestore(&(host->avail_lock), flags);
1da177e4
LT		 732}
733
734/***************************************************************************/
72d39fea 735static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
1da177e4
LT		 736{
737
738#if DEBUG_QUEUE
72d39fea 739 printk("Append pend SCB %p; ", scbp);
1da177e4 740#endif
72d39fea
AC		 741 scbp->status = SCB_PEND;
742 scbp->next = NULL;
743 if (host->last_pending != NULL) {
744 host->last_pending->next = scbp;
745 host->last_pending = scbp;
1da177e4 746 } else {
72d39fea
AC		 747 host->first_pending = scbp;
748 host->last_pending = scbp;
1da177e4
LT		 749 }
750}
751
752/***************************************************************************/
72d39fea 753static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
1da177e4
LT		 754{
755
756#if DEBUG_QUEUE
72d39fea 757 printk("Push pend SCB %p; ", scbp);
1da177e4 758#endif
72d39fea
AC		 759 scbp->status = SCB_PEND;
760 if ((scbp->next = host->first_pending) != NULL) {
761 host->first_pending = scbp;
1da177e4 762 } else {
72d39fea
AC		 763 host->first_pending = scbp;
764 host->last_pending = scbp;
1da177e4
LT		 765 }
766}
767
72d39fea 768static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
1da177e4 769{
72d39fea 770 struct scsi_ctrl_blk *first;
1da177e4
LT		 771
772
72d39fea
AC		 773 first = host->first_pending;
774 while (first != NULL) {
775 if (first->opcode != ExecSCSI)
776 return first;
777 if (first->tagmsg == 0) {
778 if ((host->act_tags[first->target] == 0) &&
779 !(host->targets[first->target].flags & TCF_BUSY))
780 return first;
1da177e4 781 } else {
72d39fea
AC		 782 if ((host->act_tags[first->target] >=
783 host->max_tags[first->target]) |
784 (host->targets[first->target].flags & TCF_BUSY)) {
785 first = first->next;
1da177e4
LT		 786 continue;
787 }
72d39fea 788 return first;
1da177e4 789 }
72d39fea 790 first = first->next;
1da177e4 791 }
72d39fea 792 return first;
1da177e4 793}
72d39fea
AC		 794
795static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4 796{
72d39fea 797 struct scsi_ctrl_blk *tmp, *prev;
1da177e4
LT		 798
799#if DEBUG_QUEUE
72d39fea 800 printk("unlink pend SCB %p; ", scb);
1da177e4
LT		 801#endif
802
72d39fea
AC		 803 prev = tmp = host->first_pending;
804 while (tmp != NULL) {
805 if (scb == tmp) { /* Unlink this SCB */
806 if (tmp == host->first_pending) {
807 if ((host->first_pending = tmp->next) == NULL)
808 host->last_pending = NULL;
1da177e4 809 } else {
72d39fea
AC		 810 prev->next = tmp->next;
811 if (tmp == host->last_pending)
812 host->last_pending = prev;
1da177e4 813 }
72d39fea 814 tmp->next = NULL;
1da177e4
LT		 815 break;
816 }
72d39fea
AC		 817 prev = tmp;
818 tmp = tmp->next;
1da177e4 819 }
1da177e4 820}
72d39fea
AC		 821
822static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
1da177e4
LT		 823{
824
825#if DEBUG_QUEUE
e2d435ea 826 printk("append busy SCB %p; ", scbp);
1da177e4 827#endif
72d39fea
AC		 828 if (scbp->tagmsg)
829 host->act_tags[scbp->target]++;
1da177e4 830 else
72d39fea
AC		 831 host->targets[scbp->target].flags |= TCF_BUSY;
832 scbp->status = SCB_BUSY;
833 scbp->next = NULL;
834 if (host->last_busy != NULL) {
835 host->last_busy->next = scbp;
836 host->last_busy = scbp;
1da177e4 837 } else {
72d39fea
AC		 838 host->first_busy = scbp;
839 host->last_busy = scbp;
1da177e4
LT		 840 }
841}
842
843/***************************************************************************/
72d39fea 844static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
1da177e4 845{
72d39fea 846 struct scsi_ctrl_blk *tmp;
1da177e4
LT		 847
848
72d39fea
AC		 849 if ((tmp = host->first_busy) != NULL) {
850 if ((host->first_busy = tmp->next) == NULL)
851 host->last_busy = NULL;
852 tmp->next = NULL;
853 if (tmp->tagmsg)
854 host->act_tags[tmp->target]--;
1da177e4 855 else
72d39fea 856 host->targets[tmp->target].flags &= ~TCF_BUSY;
1da177e4
LT		 857 }
858#if DEBUG_QUEUE
72d39fea 859 printk("Pop busy SCB %p; ", tmp);
1da177e4 860#endif
72d39fea 861 return tmp;
1da177e4
LT		 862}
863
864/***************************************************************************/
72d39fea 865static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4 866{
72d39fea 867 struct scsi_ctrl_blk *tmp, *prev;
1da177e4
LT		 868
869#if DEBUG_QUEUE
72d39fea 870 printk("unlink busy SCB %p; ", scb);
1da177e4
LT		 871#endif
872
72d39fea
AC		 873 prev = tmp = host->first_busy;
874 while (tmp != NULL) {
875 if (scb == tmp) { /* Unlink this SCB */
876 if (tmp == host->first_busy) {
877 if ((host->first_busy = tmp->next) == NULL)
878 host->last_busy = NULL;
1da177e4 879 } else {
72d39fea
AC		 880 prev->next = tmp->next;
881 if (tmp == host->last_busy)
882 host->last_busy = prev;
1da177e4 883 }
72d39fea
AC		 884 tmp->next = NULL;
885 if (tmp->tagmsg)
886 host->act_tags[tmp->target]--;
1da177e4 887 else
72d39fea 888 host->targets[tmp->target].flags &= ~TCF_BUSY;
1da177e4
LT		 889 break;
890 }
72d39fea
AC		 891 prev = tmp;
892 tmp = tmp->next;
1da177e4
LT		 893 }
894 return;
895}
896
72d39fea 897struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
1da177e4 898{
72d39fea
AC		 899 struct scsi_ctrl_blk *tmp, *prev;
900 u16 scbp_tarlun;
1da177e4
LT		 901
902
72d39fea
AC		 903 prev = tmp = host->first_busy;
904 while (tmp != NULL) {
905 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
1da177e4
LT		 906 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
907 break;
908 }
72d39fea
AC		 909 prev = tmp;
910 tmp = tmp->next;
1da177e4
LT		 911 }
912#if DEBUG_QUEUE
72d39fea 913 printk("find busy SCB %p; ", tmp);
1da177e4 914#endif
72d39fea 915 return tmp;
1da177e4
LT		 916}
917
72d39fea 918static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
1da177e4 919{
1da177e4 920#if DEBUG_QUEUE
72d39fea 921 printk("append done SCB %p; ", scbp);
1da177e4
LT		 922#endif
923
72d39fea
AC		 924 scbp->status = SCB_DONE;
925 scbp->next = NULL;
926 if (host->last_done != NULL) {
927 host->last_done->next = scbp;
928 host->last_done = scbp;
1da177e4 929 } else {
72d39fea
AC		 930 host->first_done = scbp;
931 host->last_done = scbp;
1da177e4
LT		 932 }
933}
934
72d39fea 935struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
1da177e4 936{
72d39fea 937 struct scsi_ctrl_blk *tmp;
1da177e4 938
72d39fea
AC		 939 if ((tmp = host->first_done) != NULL) {
940 if ((host->first_done = tmp->next) == NULL)
941 host->last_done = NULL;
942 tmp->next = NULL;
1da177e4
LT		 943 }
944#if DEBUG_QUEUE
72d39fea 945 printk("find done SCB %p; ",tmp);
1da177e4 946#endif
72d39fea 947 return tmp;
1da177e4
LT		 948}
949
72d39fea 950static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
1da177e4 951{
72d39fea
AC		 952 unsigned long flags;
953 struct scsi_ctrl_blk *tmp, *prev;
1da177e4 954
72d39fea 955 spin_lock_irqsave(&host->semaph_lock, flags);
1da177e4 956
72d39fea 957 if ((host->semaph == 0) && (host->active == NULL)) {
1da177e4 958 /* disable Jasmin SCSI Int */
72d39fea
AC		 959 outb(0x1F, host->addr + TUL_Mask);
960 spin_unlock_irqrestore(&host->semaph_lock, flags);
961 /* FIXME: synchronize_irq needed ? */
962 tulip_main(host);
963 spin_lock_irqsave(&host->semaph_lock, flags);
964 host->semaph = 1;
965 outb(0x0F, host->addr + TUL_Mask);
966 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4
LT		 967 return SCSI_ABORT_SNOOZE;
968 }
72d39fea
AC		 969 prev = tmp = host->first_pending; /* Check Pend queue */
970 while (tmp != NULL) {
1da177e4 971 /* 07/27/98 */
72d39fea
AC		 972 if (tmp->srb == srbp) {
973 if (tmp == host->active) {
974 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4 975 return SCSI_ABORT_BUSY;
72d39fea
AC		 976 } else if (tmp == host->first_pending) {
977 if ((host->first_pending = tmp->next) == NULL)
978 host->last_pending = NULL;
1da177e4 979 } else {
72d39fea
AC		 980 prev->next = tmp->next;
981 if (tmp == host->last_pending)
982 host->last_pending = prev;
1da177e4 983 }
72d39fea
AC		 984 tmp->hastat = HOST_ABORTED;
985 tmp->flags |= SCF_DONE;
986 if (tmp->flags & SCF_POST)
987 (*tmp->post) ((u8 *) host, (u8 *) tmp);
988 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4
LT		 989 return SCSI_ABORT_SUCCESS;
990 }
72d39fea
AC		 991 prev = tmp;
992 tmp = tmp->next;
1da177e4
LT		 993 }
994
72d39fea
AC		 995 prev = tmp = host->first_busy; /* Check Busy queue */
996 while (tmp != NULL) {
997 if (tmp->srb == srbp) {
998 if (tmp == host->active) {
999 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4 1000 return SCSI_ABORT_BUSY;
72d39fea
AC		 1001 } else if (tmp->tagmsg == 0) {
1002 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4
LT		 1003 return SCSI_ABORT_BUSY;
1004 } else {
72d39fea
AC		 1005 host->act_tags[tmp->target]--;
1006 if (tmp == host->first_busy) {
1007 if ((host->first_busy = tmp->next) == NULL)
1008 host->last_busy = NULL;
1da177e4 1009 } else {
72d39fea
AC		 1010 prev->next = tmp->next;
1011 if (tmp == host->last_busy)
1012 host->last_busy = prev;
1da177e4 1013 }
72d39fea 1014 tmp->next = NULL;
1da177e4
LT		 1015
1016
72d39fea
AC		 1017 tmp->hastat = HOST_ABORTED;
1018 tmp->flags |= SCF_DONE;
1019 if (tmp->flags & SCF_POST)
1020 (*tmp->post) ((u8 *) host, (u8 *) tmp);
1021 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4
LT		 1022 return SCSI_ABORT_SUCCESS;
1023 }
1024 }
72d39fea
AC		 1025 prev = tmp;
1026 tmp = tmp->next;
1da177e4 1027 }
72d39fea
AC		 1028 spin_unlock_irqrestore(&host->semaph_lock, flags);
1029 return SCSI_ABORT_NOT_RUNNING;
1da177e4
LT		 1030}
1031
1032/***************************************************************************/
72d39fea 1033static int initio_bad_seq(struct initio_host * host)
1da177e4 1034{
72d39fea 1035 struct scsi_ctrl_blk *scb;
1da177e4 1036
72d39fea 1037 printk("initio_bad_seg c=%d\n", host->index);
1da177e4 1038
72d39fea
AC		 1039 if ((scb = host->active) != NULL) {
1040 initio_unlink_busy_scb(host, scb);
1041 scb->hastat = HOST_BAD_PHAS;
1042 scb->tastat = 0;
1043 initio_append_done_scb(host, scb);
1da177e4 1044 }
72d39fea
AC		 1045 initio_stop_bm(host);
1046 initio_reset_scsi(host, 8); /* 7/29/98 */
1047 return initio_post_scsi_rst(host);
1da177e4
LT		 1048}
1049
a2ba192c 1050
1da177e4 1051/************************************************************************/
72d39fea 1052static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4 1053{
72d39fea 1054 unsigned long flags;
1da177e4 1055
72d39fea 1056 scb->mode = 0;
1da177e4 1057
72d39fea
AC		 1058 scb->sgidx = 0;
1059 scb->sgmax = scb->sglen;
1da177e4 1060
72d39fea 1061 spin_lock_irqsave(&host->semaph_lock, flags);
1da177e4 1062
72d39fea 1063 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1da177e4
LT		 1064
1065/* VVVVV 07/21/98 */
72d39fea
AC		 1066 if (host->semaph == 1) {
1067 /* Disable Jasmin SCSI Int */
1068 outb(0x1F, host->addr + TUL_Mask);
1069 host->semaph = 0;
1070 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4 1071
72d39fea 1072 tulip_main(host);
1da177e4 1073
72d39fea
AC		 1074 spin_lock_irqsave(&host->semaph_lock, flags);
1075 host->semaph = 1;
1076 outb(0x0F, host->addr + TUL_Mask);
1da177e4 1077 }
72d39fea 1078 spin_unlock_irqrestore(&host->semaph_lock, flags);
1da177e4
LT		 1079 return;
1080}
1081
1082/***************************************************************************/
72d39fea 1083static int initio_isr(struct initio_host * host)
1da177e4 1084{
72d39fea
AC		 1085 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1086 if (host->semaph == 1) {
1087 outb(0x1F, host->addr + TUL_Mask);
1da177e4 1088 /* Disable Tulip SCSI Int */
72d39fea 1089 host->semaph = 0;
1da177e4 1090
72d39fea 1091 tulip_main(host);
1da177e4 1092
72d39fea
AC		 1093 host->semaph = 1;
1094 outb(0x0F, host->addr + TUL_Mask);
1095 return 1;
1da177e4
LT		 1096 }
1097 }
72d39fea 1098 return 0;
1da177e4
LT		 1099}
1100
72d39fea 1101static int tulip_main(struct initio_host * host)
1da177e4 1102{
72d39fea 1103 struct scsi_ctrl_blk *scb;
1da177e4
LT		 1104
1105 for (;;) {
72d39fea
AC		 1106 tulip_scsi(host); /* Call tulip_scsi */
1107
1108 /* Walk the list of completed SCBs */
1109 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1110 if (scb->tastat == INI_QUEUE_FULL) {
1111 host->max_tags[scb->target] =
1112 host->act_tags[scb->target] - 1;
1113 scb->tastat = 0;
1114 initio_append_pend_scb(host, scb);
1da177e4
LT		 1115 continue;
1116 }
72d39fea
AC		 1117 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1118 if (scb->tastat == 2) {
1da177e4
LT		 1119
1120 /* clr sync. nego flag */
1121
72d39fea
AC		 1122 if (scb->flags & SCF_SENSE) {
1123 u8 len;
1124 len = scb->senselen;
1da177e4
LT		 1125 if (len == 0)
1126 len = 1;
72d39fea
AC		 1127 scb->buflen = scb->senselen;
1128 scb->bufptr = scb->senseptr;
1129 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1130 /* so, we won't report wrong direction in xfer_data_in,
1da177e4 1131 and won't report HOST_DO_DU in state_6 */
72d39fea
AC		 1132 scb->mode = SCM_RSENS;
1133 scb->ident &= 0xBF; /* Disable Disconnect */
1134 scb->tagmsg = 0;
1135 scb->tastat = 0;
1136 scb->cdblen = 6;
1137 scb->cdb[0] = SCSICMD_RequestSense;
1138 scb->cdb[1] = 0;
1139 scb->cdb[2] = 0;
1140 scb->cdb[3] = 0;
1141 scb->cdb[4] = len;
1142 scb->cdb[5] = 0;
1143 initio_push_pend_scb(host, scb);
1da177e4
LT		 1144 break;
1145 }
1146 }
1147 } else { /* in request sense mode */
1148
72d39fea 1149 if (scb->tastat == 2) { /* check contition status again after sending
1da177e4 1150 requset sense cmd 0x3 */
72d39fea 1151 scb->hastat = HOST_BAD_PHAS;
1da177e4 1152 }
72d39fea 1153 scb->tastat = 2;
1da177e4 1154 }
72d39fea
AC		 1155 scb->flags |= SCF_DONE;
1156 if (scb->flags & SCF_POST) {
1157 /* FIXME: only one post method and lose casts */
1158 (*scb->post) ((u8 *) host, (u8 *) scb);
1da177e4
LT		 1159 }
1160 } /* while */
1da177e4 1161 /* find_active: */
72d39fea 1162 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1da177e4 1163 continue;
72d39fea 1164 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1da177e4 1165 return 1; /* return to OS, enable interrupt */
1da177e4 1166 /* Check pending SCB */
72d39fea 1167 if (initio_find_first_pend_scb(host) == NULL)
1da177e4 1168 return 1; /* return to OS, enable interrupt */
1da177e4
LT		 1169 } /* End of for loop */
1170 /* statement won't reach here */
1171}
1172
72d39fea 1173static void tulip_scsi(struct initio_host * host)
1da177e4 1174{
72d39fea
AC		 1175 struct scsi_ctrl_blk *scb;
1176 struct target_control *active_tc;
1da177e4
LT		 1177
1178 /* make sure to service interrupt asap */
72d39fea
AC		 1179 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1180 host->phase = host->jsstatus0 & TSS_PH_MASK;
1181 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1182 host->jsint = inb(host->addr + TUL_SInt);
1183 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1184 int_initio_scsi_rst(host);
1da177e4
LT		 1185 return;
1186 }
72d39fea
AC		 1187 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1188 if (int_initio_resel(host) == 0)
1189 initio_next_state(host);
1da177e4
LT		 1190 return;
1191 }
72d39fea
AC		 1192 if (host->jsint & TSS_SEL_TIMEOUT) {
1193 int_initio_busfree(host);
1da177e4
LT		 1194 return;
1195 }
72d39fea
AC		 1196 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1197 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1da177e4
LT		 1198 return;
1199 }
72d39fea
AC		 1200 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1201 if ((scb = host->active) != NULL)
1202 initio_next_state(host);
1da177e4
LT		 1203 return;
1204 }
1205 }
72d39fea 1206 if (host->active != NULL)
1da177e4
LT		 1207 return;
1208
72d39fea 1209 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1da177e4
LT		 1210 return;
1211
1212 /* program HBA's SCSI ID & target SCSI ID */
72d39fea
AC		 1213 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1214 host->addr + TUL_SScsiId);
1215 if (scb->opcode == ExecSCSI) {
1216 active_tc = &host->targets[scb->target];
1da177e4 1217
72d39fea
AC		 1218 if (scb->tagmsg)
1219 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1da177e4 1220 else
72d39fea 1221 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1da177e4 1222
72d39fea
AC		 1223 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1224 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1225 initio_select_atn_stop(host, scb);
1da177e4 1226 } else {
72d39fea
AC		 1227 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1228 initio_select_atn_stop(host, scb);
1da177e4 1229 } else {
72d39fea
AC		 1230 if (scb->tagmsg)
1231 initio_select_atn3(host, scb);
1da177e4 1232 else
72d39fea 1233 initio_select_atn(host, scb);
1da177e4
LT		 1234 }
1235 }
72d39fea
AC		 1236 if (scb->flags & SCF_POLL) {
1237 while (wait_tulip(host) != -1) {
1238 if (initio_next_state(host) == -1)
1da177e4
LT		 1239 break;
1240 }
1241 }
72d39fea
AC		 1242 } else if (scb->opcode == BusDevRst) {
1243 initio_select_atn_stop(host, scb);
1244 scb->next_state = 8;
1245 if (scb->flags & SCF_POLL) {
1246 while (wait_tulip(host) != -1) {
1247 if (initio_next_state(host) == -1)
1da177e4
LT		 1248 break;
1249 }
1250 }
72d39fea
AC		 1251 } else if (scb->opcode == AbortCmd) {
1252 if (initio_abort_srb(host, scb->srb) != 0) {
1253 initio_unlink_pend_scb(host, scb);
1254 initio_release_scb(host, scb);
1da177e4 1255 } else {
72d39fea
AC		 1256 scb->opcode = BusDevRst;
1257 initio_select_atn_stop(host, scb);
1258 scb->next_state = 8;
1da177e4 1259 }
1da177e4 1260 } else {
72d39fea
AC		 1261 initio_unlink_pend_scb(host, scb);
1262 scb->hastat = 0x16; /* bad command */
1263 initio_append_done_scb(host, scb);
1da177e4
LT		 1264 }
1265 return;
1266}
1267
72d39fea
AC		 1268/**
1269 * initio_next_state - Next SCSI state
1270 * @host: InitIO host we are processing
1271 *
1272 * Progress the active command block along the state machine
1273 * until we hit a state which we must wait for activity to occur.
1274 *
1275 * Returns zero or a negative code.
1276 */
1da177e4 1277
72d39fea 1278static int initio_next_state(struct initio_host * host)
1da177e4
LT		 1279{
1280 int next;
1281
72d39fea 1282 next = host->active->next_state;
1da177e4
LT		 1283 for (;;) {
1284 switch (next) {
1285 case 1:
72d39fea 1286 next = initio_state_1(host);
1da177e4
LT		 1287 break;
1288 case 2:
72d39fea 1289 next = initio_state_2(host);
1da177e4
LT		 1290 break;
1291 case 3:
72d39fea 1292 next = initio_state_3(host);
1da177e4
LT		 1293 break;
1294 case 4:
72d39fea 1295 next = initio_state_4(host);
1da177e4
LT		 1296 break;
1297 case 5:
72d39fea 1298 next = initio_state_5(host);
1da177e4
LT		 1299 break;
1300 case 6:
72d39fea 1301 next = initio_state_6(host);
1da177e4
LT		 1302 break;
1303 case 7:
72d39fea 1304 next = initio_state_7(host);
1da177e4
LT		 1305 break;
1306 case 8:
72d39fea 1307 return initio_bus_device_reset(host);
1da177e4 1308 default:
72d39fea 1309 return initio_bad_seq(host);
1da177e4
LT		 1310 }
1311 if (next <= 0)
1312 return next;
1313 }
1314}
1315
1316
72d39fea
AC		 1317/**
1318 * initio_state_1 - SCSI state machine
1319 * @host: InitIO host we are controlling
1320 *
1321 * Perform SCSI state processing for Select/Attention/Stop
1322 */
1323
1324static int initio_state_1(struct initio_host * host)
1da177e4 1325{
72d39fea
AC		 1326 struct scsi_ctrl_blk *scb = host->active;
1327 struct target_control *active_tc = host->active_tc;
1da177e4
LT		 1328#if DEBUG_STATE
1329 printk("-s1-");
1330#endif
1331
72d39fea
AC		 1332 /* Move the SCB from pending to busy */
1333 initio_unlink_pend_scb(host, scb);
1334 initio_append_busy_scb(host, scb);
1da177e4 1335
72d39fea 1336 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1da177e4 1337 /* ATN on */
72d39fea
AC		 1338 if (host->phase == MSG_OUT) {
1339 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1340 outb(scb->ident, host->addr + TUL_SFifo);
1341
1342 if (scb->tagmsg) {
1343 outb(scb->tagmsg, host->addr + TUL_SFifo);
1344 outb(scb->tagid, host->addr + TUL_SFifo);
1345 }
1346 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1347 active_tc->flags |= TCF_WDTR_DONE;
1348 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1349 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1350 outb(3, host->addr + TUL_SFifo); /* Sync request */
1351 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1352 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1353 active_tc->flags |= TCF_SYNC_DONE;
1354 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1355 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1356 outb(1, host->addr + TUL_SFifo); /* sync request */
1357 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1358 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1359 }
1360 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1361 if (wait_tulip(host) == -1)
1362 return -1;
1363 }
1364 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1365 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1366 /* Into before CDB xfer */
1367 return 3;
1368}
1369
1370
1371/**
1372 * initio_state_2 - SCSI state machine
1373 * @host: InitIO host we are controlling
1374 *
1375 * state after selection with attention
1376 * state after selection with attention3
1377 */
1da177e4 1378
72d39fea 1379static int initio_state_2(struct initio_host * host)
1da177e4 1380{
72d39fea
AC		 1381 struct scsi_ctrl_blk *scb = host->active;
1382 struct target_control *active_tc = host->active_tc;
1da177e4
LT		 1383#if DEBUG_STATE
1384 printk("-s2-");
1385#endif
1386
72d39fea
AC		 1387 initio_unlink_pend_scb(host, scb);
1388 initio_append_busy_scb(host, scb);
1da177e4 1389
72d39fea 1390 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1da177e4 1391
72d39fea
AC		 1392 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1393 return 4;
1394
1395 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1396 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1397 /* Into before CDB xfer */
1398 return 3;
1da177e4
LT		 1399}
1400
72d39fea
AC		 1401/**
1402 * initio_state_3 - SCSI state machine
1403 * @host: InitIO host we are controlling
1404 *
1405 * state before CDB xfer is done
1406 */
1407
1408static int initio_state_3(struct initio_host * host)
1da177e4 1409{
72d39fea
AC		 1410 struct scsi_ctrl_blk *scb = host->active;
1411 struct target_control *active_tc = host->active_tc;
1da177e4
LT		 1412 int i;
1413
1414#if DEBUG_STATE
1415 printk("-s3-");
1416#endif
1417 for (;;) {
72d39fea 1418 switch (host->phase) {
1da177e4 1419 case CMD_OUT: /* Command out phase */
72d39fea
AC		 1420 for (i = 0; i < (int) scb->cdblen; i++)
1421 outb(scb->cdb[i], host->addr + TUL_SFifo);
1422 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1423 if (wait_tulip(host) == -1)
1424 return -1;
1425 if (host->phase == CMD_OUT)
1426 return initio_bad_seq(host);
1427 return 4;
1da177e4
LT		 1428
1429 case MSG_IN: /* Message in phase */
72d39fea
AC		 1430 scb->next_state = 3;
1431 if (initio_msgin(host) == -1)
1432 return -1;
1da177e4
LT		 1433 break;
1434
1435 case STATUS_IN: /* Status phase */
72d39fea
AC		 1436 if (initio_status_msg(host) == -1)
1437 return -1;
1da177e4
LT		 1438 break;
1439
1440 case MSG_OUT: /* Message out phase */
72d39fea
AC		 1441 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1442 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1443 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1444 if (wait_tulip(host) == -1)
1445 return -1;
1da177e4 1446 } else {
72d39fea
AC		 1447 active_tc->flags |= TCF_SYNC_DONE;
1448
1449 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1450 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1451 outb(1, host->addr + TUL_SFifo); /* sync request */
1452 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1453 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1454 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1455 if (wait_tulip(host) == -1)
1456 return -1;
1457 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1458 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1da177e4
LT		 1459
1460 }
1461 break;
1da177e4 1462 default:
72d39fea 1463 return initio_bad_seq(host);
1da177e4
LT		 1464 }
1465 }
1466}
1467
72d39fea
AC		 1468/**
1469 * initio_state_4 - SCSI state machine
1470 * @host: InitIO host we are controlling
1471 *
1472 * SCSI state machine. State 4
1473 */
1da177e4 1474
72d39fea 1475static int initio_state_4(struct initio_host * host)
1da177e4 1476{
72d39fea 1477 struct scsi_ctrl_blk *scb = host->active;
1da177e4
LT		 1478
1479#if DEBUG_STATE
1480 printk("-s4-");
1481#endif
72d39fea
AC		 1482 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1483 return 6; /* Go to state 6 (After data) */
1da177e4
LT		 1484 }
1485 for (;;) {
72d39fea
AC		 1486 if (scb->buflen == 0)
1487 return 6;
1da177e4 1488
72d39fea 1489 switch (host->phase) {
1da177e4
LT		 1490
1491 case STATUS_IN: /* Status phase */
72d39fea
AC		 1492 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1493 scb->hastat = HOST_DO_DU;
1494 if ((initio_status_msg(host)) == -1)
1495 return -1;
1da177e4
LT		 1496 break;
1497
1498 case MSG_IN: /* Message in phase */
72d39fea
AC		 1499 scb->next_state = 0x4;
1500 if (initio_msgin(host) == -1)
1501 return -1;
1da177e4
LT		 1502 break;
1503
1504 case MSG_OUT: /* Message out phase */
72d39fea
AC		 1505 if (host->jsstatus0 & TSS_PAR_ERROR) {
1506 scb->buflen = 0;
1507 scb->hastat = HOST_DO_DU;
1508 if (initio_msgout_ide(host) == -1)
1509 return -1;
1510 return 6;
1da177e4 1511 } else {
72d39fea
AC		 1512 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1513 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1514 if (wait_tulip(host) == -1)
1515 return -1;
1da177e4
LT		 1516 }
1517 break;
1518
1519 case DATA_IN: /* Data in phase */
72d39fea 1520 return initio_xfer_data_in(host);
1da177e4
LT		 1521
1522 case DATA_OUT: /* Data out phase */
72d39fea 1523 return initio_xfer_data_out(host);
1da177e4
LT		 1524
1525 default:
72d39fea 1526 return initio_bad_seq(host);
1da177e4
LT		 1527 }
1528 }
1529}
1530
1531
72d39fea
AC		 1532/**
1533 * initio_state_5 - SCSI state machine
1534 * @host: InitIO host we are controlling
1535 *
1536 * State after dma xfer done or phase change before xfer done
1537 */
1538
1539static int initio_state_5(struct initio_host * host)
1da177e4 1540{
72d39fea 1541 struct scsi_ctrl_blk *scb = host->active;
1da177e4
LT		 1542 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1543
1544#if DEBUG_STATE
1545 printk("-s5-");
1546#endif
72d39fea
AC		 1547 /*------ get remaining count -------*/
1548 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1da177e4 1549
72d39fea 1550 if (inb(host->addr + TUL_XCmd) & 0x20) {
1da177e4
LT		 1551 /* ----------------------- DATA_IN ----------------------------- */
1552 /* check scsi parity error */
72d39fea
AC		 1553 if (host->jsstatus0 & TSS_PAR_ERROR)
1554 scb->hastat = HOST_DO_DU;
1555 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1da177e4 1556 /* tell Hardware scsi xfer has been terminated */
72d39fea 1557 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1da177e4 1558 /* wait until DMA xfer not pending */
72d39fea
AC		 1559 while (inb(host->addr + TUL_XStatus) & XPEND)
1560 cpu_relax();
1da177e4
LT		 1561 }
1562 } else {
72d39fea
AC		 1563 /*-------- DATA OUT -----------*/
1564 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1565 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1566 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1da177e4 1567 else
72d39fea 1568 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1da177e4 1569 }
72d39fea
AC		 1570 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1571 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1da177e4 1572 /* wait Abort DMA xfer done */
72d39fea
AC		 1573 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1574 cpu_relax();
1da177e4 1575 }
72d39fea
AC		 1576 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1577 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1578 if (wait_tulip(host) == -1)
1579 return -1;
1da177e4
LT		 1580 cnt = 0;
1581 } else {
72d39fea
AC		 1582 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1583 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1da177e4
LT		 1584 }
1585 }
1da177e4 1586 if (cnt == 0) {
72d39fea
AC		 1587 scb->buflen = 0;
1588 return 6; /* After Data */
1da177e4
LT		 1589 }
1590 /* Update active data pointer */
72d39fea
AC		 1591 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1592 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1593 if (scb->flags & SCF_SG) {
1594 struct sg_entry *sgp;
1595 unsigned long i;
1596
1597 sgp = &scb->sglist[scb->sgidx];
1598 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1599 xcnt -= (long) sgp->len;
1da177e4 1600 if (xcnt < 0) { /* this sgp xfer half done */
72d39fea
AC		 1601 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1602 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1603 sgp->len -= (u32) xcnt; /* new len to be xfer */
1604 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1da177e4 1605 /* new SG table ptr */
72d39fea 1606 scb->sglen = (u8) (scb->sgmax - i);
1da177e4 1607 /* new SG table len */
72d39fea 1608 scb->sgidx = (u16) i;
1da177e4 1609 /* for next disc and come in this loop */
72d39fea 1610 return 4; /* Go to state 4 */
1da177e4
LT		 1611 }
1612 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1613 } /* for */
72d39fea 1614 return 6; /* Go to state 6 */
1da177e4 1615 } else {
72d39fea 1616 scb->bufptr += (u32) xcnt;
1da177e4 1617 }
72d39fea 1618 return 4; /* Go to state 4 */
1da177e4
LT		 1619}
1620
72d39fea
AC		 1621/**
1622 * initio_state_6 - SCSI state machine
1623 * @host: InitIO host we are controlling
1624 *
1625 * State after Data phase
1626 */
1627
1628static int initio_state_6(struct initio_host * host)
1da177e4 1629{
72d39fea 1630 struct scsi_ctrl_blk *scb = host->active;
1da177e4
LT		 1631
1632#if DEBUG_STATE
1633 printk("-s6-");
1634#endif
1635 for (;;) {
72d39fea 1636 switch (host->phase) {
1da177e4 1637 case STATUS_IN: /* Status phase */
72d39fea
AC		 1638 if ((initio_status_msg(host)) == -1)
1639 return -1;
1da177e4
LT		 1640 break;
1641
1642 case MSG_IN: /* Message in phase */
72d39fea
AC		 1643 scb->next_state = 6;
1644 if ((initio_msgin(host)) == -1)
1645 return -1;
1da177e4
LT		 1646 break;
1647
1648 case MSG_OUT: /* Message out phase */
72d39fea
AC		 1649 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1650 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1651 if (wait_tulip(host) == -1)
1652 return -1;
1da177e4
LT		 1653 break;
1654
1655 case DATA_IN: /* Data in phase */
72d39fea 1656 return initio_xpad_in(host);
1da177e4
LT		 1657
1658 case DATA_OUT: /* Data out phase */
72d39fea 1659 return initio_xpad_out(host);
1da177e4
LT		 1660
1661 default:
72d39fea 1662 return initio_bad_seq(host);
1da177e4
LT		 1663 }
1664 }
1665}
1666
72d39fea
AC		 1667/**
1668 * initio_state_7 - SCSI state machine
1669 * @host: InitIO host we are controlling
1670 *
1671 */
1672
1673int initio_state_7(struct initio_host * host)
1da177e4
LT		 1674{
1675 int cnt, i;
1676
1677#if DEBUG_STATE
1678 printk("-s7-");
1679#endif
1680 /* flush SCSI FIFO */
72d39fea 1681 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1da177e4
LT		 1682 if (cnt) {
1683 for (i = 0; i < cnt; i++)
72d39fea 1684 inb(host->addr + TUL_SFifo);
1da177e4 1685 }
72d39fea 1686 switch (host->phase) {
1da177e4
LT		 1687 case DATA_IN: /* Data in phase */
1688 case DATA_OUT: /* Data out phase */
72d39fea 1689 return initio_bad_seq(host);
1da177e4 1690 default:
72d39fea 1691 return 6; /* Go to state 6 */
1da177e4
LT		 1692 }
1693}
1694
72d39fea
AC		 1695/**
1696 * initio_xfer_data_in - Commence data input
1697 * @host: InitIO host in use
1698 *
1699 * Commence a block of data transfer. The transfer itself will
1700 * be managed by the controller and we will get a completion (or
1701 * failure) interrupt.
1702 */
1703static int initio_xfer_data_in(struct initio_host * host)
1da177e4 1704{
72d39fea 1705 struct scsi_ctrl_blk *scb = host->active;
1da177e4 1706
72d39fea
AC		 1707 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1708 return 6; /* wrong direction */
1da177e4 1709
72d39fea
AC		 1710 outl(scb->buflen, host->addr + TUL_SCnt0);
1711 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1da177e4 1712
72d39fea
AC		 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_IN, host->addr + TUL_XCmd);
1da177e4 1717 } else {
72d39fea
AC		 1718 outl(scb->buflen, host->addr + TUL_XCntH);
1719 outl(scb->bufptr, host->addr + TUL_XAddH);
1720 outb(TAX_X_IN, host->addr + TUL_XCmd);
1da177e4 1721 }
72d39fea
AC		 1722 scb->next_state = 0x5;
1723 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1da177e4
LT		 1724}
1725
72d39fea
AC		 1726/**
1727 * initio_xfer_data_out - Commence data output
1728 * @host: InitIO host in use
1729 *
1730 * Commence a block of data transfer. The transfer itself will
1731 * be managed by the controller and we will get a completion (or
1732 * failure) interrupt.
1733 */
1da177e4 1734
72d39fea 1735static int initio_xfer_data_out(struct initio_host * host)
1da177e4 1736{
72d39fea 1737 struct scsi_ctrl_blk *scb = host->active;
1da177e4 1738
72d39fea
AC		 1739 if ((scb->flags & SCF_DIR) == SCF_DIN)
1740 return 6; /* wrong direction */
1da177e4 1741
72d39fea
AC		 1742 outl(scb->buflen, host->addr + TUL_SCnt0);
1743 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1744
1745 if (scb->flags & SCF_SG) { /* S/G xfer */
1746 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1747 outl(scb->bufptr, host->addr + TUL_XAddH);
1748 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1da177e4 1749 } else {
72d39fea
AC		 1750 outl(scb->buflen, host->addr + TUL_XCntH);
1751 outl(scb->bufptr, host->addr + TUL_XAddH);
1752 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1da177e4
LT		 1753 }
1754
72d39fea
AC		 1755 scb->next_state = 0x5;
1756 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1da177e4
LT		 1757}
1758
72d39fea 1759int initio_xpad_in(struct initio_host * host)
1da177e4 1760{
72d39fea
AC		 1761 struct scsi_ctrl_blk *scb = host->active;
1762 struct target_control *active_tc = host->active_tc;
1da177e4 1763
72d39fea
AC		 1764 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1765 scb->hastat = HOST_DO_DU; /* over run */
1da177e4 1766 for (;;) {
72d39fea
AC		 1767 if (active_tc->js_period & TSC_WIDE_SCSI)
1768 outl(2, host->addr + TUL_SCnt0);
1da177e4 1769 else
72d39fea 1770 outl(1, host->addr + TUL_SCnt0);
1da177e4 1771
72d39fea
AC		 1772 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1773 if (wait_tulip(host) == -1)
1774 return -1;
1775 if (host->phase != DATA_IN) {
1776 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1777 return 6;
1da177e4 1778 }
72d39fea 1779 inb(host->addr + TUL_SFifo);
1da177e4
LT		 1780 }
1781}
1782
72d39fea 1783int initio_xpad_out(struct initio_host * host)
1da177e4 1784{
72d39fea
AC		 1785 struct scsi_ctrl_blk *scb = host->active;
1786 struct target_control *active_tc = host->active_tc;
1da177e4 1787
72d39fea
AC		 1788 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1789 scb->hastat = HOST_DO_DU; /* over run */
1da177e4 1790 for (;;) {
72d39fea
AC		 1791 if (active_tc->js_period & TSC_WIDE_SCSI)
1792 outl(2, host->addr + TUL_SCnt0);
1da177e4 1793 else
72d39fea 1794 outl(1, host->addr + TUL_SCnt0);
1da177e4 1795
72d39fea
AC		 1796 outb(0, host->addr + TUL_SFifo);
1797 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1798 if ((wait_tulip(host)) == -1)
1799 return -1;
1800 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1801 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1802 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1803 return 6;
1da177e4
LT		 1804 }
1805 }
1806}
1807
72d39fea 1808int initio_status_msg(struct initio_host * host)
1da177e4 1809{ /* status & MSG_IN */
72d39fea
AC		 1810 struct scsi_ctrl_blk *scb = host->active;
1811 u8 msg;
1812
1813 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1814 if (wait_tulip(host) == -1)
1815 return -1;
1da177e4 1816
1da177e4 1817 /* get status */
72d39fea 1818 scb->tastat = inb(host->addr + TUL_SFifo);
1da177e4 1819
72d39fea
AC		 1820 if (host->phase == MSG_OUT) {
1821 if (host->jsstatus0 & TSS_PAR_ERROR)
1822 outb(MSG_PARITY, host->addr + TUL_SFifo);
1823 else
1824 outb(MSG_NOP, host->addr + TUL_SFifo);
1825 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1826 return wait_tulip(host);
1827 }
1828 if (host->phase == MSG_IN) {
1829 msg = inb(host->addr + TUL_SFifo);
1830 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1831 if ((initio_msgin_accept(host)) == -1)
1832 return -1;
1833 if (host->phase != MSG_OUT)
1834 return initio_bad_seq(host);
1835 outb(MSG_PARITY, host->addr + TUL_SFifo);
1836 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1837 return wait_tulip(host);
1da177e4
LT		 1838 }
1839 if (msg == 0) { /* Command complete */
1840
72d39fea
AC		 1841 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1842 return initio_bad_seq(host);
1843 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1844 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1845 return initio_wait_done_disc(host);
1da177e4
LT		 1846
1847 }
72d39fea
AC		 1848 if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
1849 if ((scb->tastat & 0x18) == 0x10)
1850 return initio_msgin_accept(host);
1da177e4
LT		 1851 }
1852 }
72d39fea 1853 return initio_bad_seq(host);
1da177e4
LT		 1854}
1855
1856
1da177e4 1857/* scsi bus free */
72d39fea 1858int int_initio_busfree(struct initio_host * host)
1da177e4 1859{
72d39fea 1860 struct scsi_ctrl_blk *scb = host->active;
1da177e4 1861
72d39fea
AC		 1862 if (scb != NULL) {
1863 if (scb->status & SCB_SELECT) { /* selection timeout */
1864 initio_unlink_pend_scb(host, scb);
1865 scb->hastat = HOST_SEL_TOUT;
1866 initio_append_done_scb(host, scb);
1da177e4 1867 } else { /* Unexpected bus free */
72d39fea
AC		 1868 initio_unlink_busy_scb(host, scb);
1869 scb->hastat = HOST_BUS_FREE;
1870 initio_append_done_scb(host, scb);
1da177e4 1871 }
72d39fea
AC		 1872 host->active = NULL;
1873 host->active_tc = NULL;
1da177e4 1874 }
72d39fea
AC		 1875 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1876 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1877 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1878 return -1;
1da177e4
LT		 1879}
1880
1881
72d39fea
AC		 1882/**
1883 * int_initio_scsi_rst - SCSI reset occurred
1884 * @host: Host seeing the reset
1885 *
1886 * A SCSI bus reset has occurred. Clean up any pending transfer
1887 * the hardware is doing by DMA and then abort all active and
1888 * disconnected commands. The mid layer should sort the rest out
1889 * for us
1890 */
1891
1892static int int_initio_scsi_rst(struct initio_host * host)
1da177e4 1893{
72d39fea 1894 struct scsi_ctrl_blk *scb;
1da177e4
LT		 1895 int i;
1896
1897 /* if DMA xfer is pending, abort DMA xfer */
72d39fea
AC		 1898 if (inb(host->addr + TUL_XStatus) & 0x01) {
1899 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1da177e4 1900 /* wait Abort DMA xfer done */
72d39fea
AC		 1901 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1902 cpu_relax();
1903 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1da177e4
LT		 1904 }
1905 /* Abort all active & disconnected scb */
72d39fea
AC		 1906 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1907 scb->hastat = HOST_BAD_PHAS;
1908 initio_append_done_scb(host, scb);
1da177e4 1909 }
72d39fea
AC		 1910 host->active = NULL;
1911 host->active_tc = NULL;
1da177e4
LT		 1912
1913 /* clr sync nego. done flag */
72d39fea
AC		 1914 for (i = 0; i < host->max_tar; i++)
1915 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1916 return -1;
1da177e4
LT		 1917}
1918
72d39fea 1919/**
25985edc 1920 * int_initio_scsi_resel - Reselection occurred
72d39fea
AC		 1921 * @host: InitIO host adapter
1922 *
1923 * A SCSI reselection event has been signalled and the interrupt
1924 * is now being processed. Work out which command block needs attention
1925 * and continue processing that command.
1926 */
1da177e4 1927
72d39fea 1928int int_initio_resel(struct initio_host * host)
1da177e4 1929{
72d39fea
AC		 1930 struct scsi_ctrl_blk *scb;
1931 struct target_control *active_tc;
1932 u8 tag, msg = 0;
1933 u8 tar, lun;
1da177e4 1934
72d39fea
AC		 1935 if ((scb = host->active) != NULL) {
1936 /* FIXME: Why check and not just clear ? */
1937 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1938 scb->status &= ~SCB_SELECT;
1939 host->active = NULL;
1da177e4
LT		 1940 }
1941 /* --------- get target id---------------------- */
72d39fea 1942 tar = inb(host->addr + TUL_SBusId);
1da177e4 1943 /* ------ get LUN from Identify message----------- */
72d39fea 1944 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1da177e4 1945 /* 07/22/98 from 0x1F -> 0x0F */
72d39fea
AC		 1946 active_tc = &host->targets[tar];
1947 host->active_tc = active_tc;
1948 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1949 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1da177e4
LT		 1950
1951 /* ------------- tag queueing ? ------------------- */
72d39fea
AC		 1952 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1953 if ((initio_msgin_accept(host)) == -1)
1954 return -1;
1955 if (host->phase != MSG_IN)
1da177e4 1956 goto no_tag;
72d39fea
AC		 1957 outl(1, host->addr + TUL_SCnt0);
1958 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1959 if (wait_tulip(host) == -1)
1960 return -1;
1961 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1da177e4 1962
72d39fea 1963 if (msg < MSG_STAG || msg > MSG_OTAG) /* Is simple Tag */
1da177e4
LT		 1964 goto no_tag;
1965
72d39fea
AC		 1966 if (initio_msgin_accept(host) == -1)
1967 return -1;
1da177e4 1968
72d39fea 1969 if (host->phase != MSG_IN)
1da177e4
LT		 1970 goto no_tag;
1971
72d39fea
AC		 1972 outl(1, host->addr + TUL_SCnt0);
1973 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1974 if (wait_tulip(host) == -1)
1975 return -1;
1976 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
1977 scb = host->scb + tag;
1978 if (scb->target != tar || scb->lun != lun) {
1979 return initio_msgout_abort_tag(host);
1980 }
1981 if (scb->status != SCB_BUSY) { /* 03/24/95 */
1982 return initio_msgout_abort_tag(host);
1983 }
1984 host->active = scb;
1985 if ((initio_msgin_accept(host)) == -1)
1986 return -1;
1da177e4
LT		 1987 } else { /* No tag */
1988 no_tag:
72d39fea
AC		 1989 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1990 return initio_msgout_abort_targ(host);
1da177e4 1991 }
72d39fea
AC		 1992 host->active = scb;
1993 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1994 if ((initio_msgin_accept(host)) == -1)
1995 return -1;
1da177e4
LT		 1996 }
1997 }
1998 return 0;
1999}
2000
72d39fea
AC		 2001/**
2002 * int_initio_bad_seq - out of phase
2003 * @host: InitIO host flagging event
2004 *
2005 * We have ended up out of phase somehow. Reset the host controller
2006 * and throw all our toys out of the pram. Let the midlayer clean up
2007 */
1da177e4 2008
72d39fea 2009static int int_initio_bad_seq(struct initio_host * host)
1da177e4 2010{ /* target wrong phase */
72d39fea 2011 struct scsi_ctrl_blk *scb;
1da177e4
LT		 2012 int i;
2013
72d39fea 2014 initio_reset_scsi(host, 10);
1da177e4 2015
72d39fea
AC		 2016 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2017 scb->hastat = HOST_BAD_PHAS;
2018 initio_append_done_scb(host, scb);
1da177e4 2019 }
72d39fea
AC		 2020 for (i = 0; i < host->max_tar; i++)
2021 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2022 return -1;
1da177e4
LT		 2023}
2024
2025
72d39fea
AC		 2026/**
2027 * initio_msgout_abort_targ - abort a tag
2028 * @host: InitIO host
2029 *
2030 * Abort when the target/lun does not match or when our SCB is not
2031 * busy. Used by untagged commands.
2032 */
2033
2034static int initio_msgout_abort_targ(struct initio_host * host)
1da177e4
LT		 2035{
2036
72d39fea
AC		 2037 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2038 if (initio_msgin_accept(host) == -1)
2039 return -1;
2040 if (host->phase != MSG_OUT)
2041 return initio_bad_seq(host);
1da177e4 2042
72d39fea
AC		 2043 outb(MSG_ABORT, host->addr + TUL_SFifo);
2044 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1da177e4 2045
72d39fea 2046 return initio_wait_disc(host);
1da177e4
LT		 2047}
2048
72d39fea
AC		 2049/**
2050 * initio_msgout_abort_tag - abort a tag
2051 * @host: InitIO host
2052 *
2053 * Abort when the target/lun does not match or when our SCB is not
2054 * busy. Used for tagged commands.
2055 */
2056
2057static int initio_msgout_abort_tag(struct initio_host * host)
1da177e4
LT		 2058{
2059
72d39fea
AC		 2060 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2061 if (initio_msgin_accept(host) == -1)
2062 return -1;
2063 if (host->phase != MSG_OUT)
2064 return initio_bad_seq(host);
1da177e4 2065
72d39fea
AC		 2066 outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
2067 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1da177e4 2068
72d39fea 2069 return initio_wait_disc(host);
1da177e4
LT		 2070
2071}
2072
72d39fea
AC		 2073/**
2074 * initio_msgin - Message in
2075 * @host: InitIO Host
2076 *
2077 * Process incoming message
2078 */
2079static int initio_msgin(struct initio_host * host)
1da177e4 2080{
72d39fea 2081 struct target_control *active_tc;
1da177e4
LT		 2082
2083 for (;;) {
72d39fea 2084 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1da177e4 2085
72d39fea
AC		 2086 outl(1, host->addr + TUL_SCnt0);
2087 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2088 if (wait_tulip(host) == -1)
2089 return -1;
1da177e4 2090
72d39fea 2091 switch (inb(host->addr + TUL_SFifo)) {
1da177e4 2092 case MSG_DISC: /* Disconnect msg */
72d39fea
AC		 2093 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2094 return initio_wait_disc(host);
1da177e4
LT		 2095 case MSG_SDP:
2096 case MSG_RESTORE:
2097 case MSG_NOP:
72d39fea 2098 initio_msgin_accept(host);
1da177e4 2099 break;
1da177e4 2100 case MSG_REJ: /* Clear ATN first */
72d39fea
AC		 2101 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2102 host->addr + TUL_SSignal);
2103 active_tc = host->active_tc;
2104 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
2105 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2106 host->addr + TUL_SSignal);
2107 initio_msgin_accept(host);
1da177e4 2108 break;
1da177e4 2109 case MSG_EXTEND: /* extended msg */
72d39fea 2110 initio_msgin_extend(host);
1da177e4 2111 break;
1da177e4 2112 case MSG_IGNOREWIDE:
72d39fea 2113 initio_msgin_accept(host);
1da177e4 2114 break;
1da177e4 2115 case MSG_COMP:
72d39fea
AC		 2116 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2117 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2118 return initio_wait_done_disc(host);
1da177e4 2119 default:
72d39fea 2120 initio_msgout_reject(host);
1da177e4
LT		 2121 break;
2122 }
72d39fea
AC		 2123 if (host->phase != MSG_IN)
2124 return host->phase;
1da177e4
LT		 2125 }
2126 /* statement won't reach here */
2127}
2128
72d39fea 2129static int initio_msgout_reject(struct initio_host * host)
1da177e4 2130{
72d39fea 2131 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
1da177e4 2132
72d39fea
AC		 2133 if (initio_msgin_accept(host) == -1)
2134 return -1;
1da177e4 2135
72d39fea
AC		 2136 if (host->phase == MSG_OUT) {
2137 outb(MSG_REJ, host->addr + TUL_SFifo); /* Msg reject */
2138 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2139 return wait_tulip(host);
1da177e4 2140 }
72d39fea 2141 return host->phase;
1da177e4
LT		 2142}
2143
72d39fea 2144static int initio_msgout_ide(struct initio_host * host)
1da177e4 2145{
72d39fea
AC		 2146 outb(MSG_IDE, host->addr + TUL_SFifo); /* Initiator Detected Error */
2147 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2148 return wait_tulip(host);
1da177e4
LT		 2149}
2150
72d39fea 2151static int initio_msgin_extend(struct initio_host * host)
1da177e4 2152{
72d39fea 2153 u8 len, idx;
1da177e4 2154
72d39fea
AC		 2155 if (initio_msgin_accept(host) != MSG_IN)
2156 return host->phase;
1da177e4
LT		 2157
2158 /* Get extended msg length */
72d39fea
AC		 2159 outl(1, host->addr + TUL_SCnt0);
2160 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2161 if (wait_tulip(host) == -1)
2162 return -1;
1da177e4 2163
72d39fea
AC		 2164 len = inb(host->addr + TUL_SFifo);
2165 host->msg[0] = len;
1da177e4
LT		 2166 for (idx = 1; len != 0; len--) {
2167
72d39fea
AC		 2168 if ((initio_msgin_accept(host)) != MSG_IN)
2169 return host->phase;
2170 outl(1, host->addr + TUL_SCnt0);
2171 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2172 if (wait_tulip(host) == -1)
2173 return -1;
2174 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2175 }
2176 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
2177 u8 r;
2178 if (host->msg[0] != 3) /* if length is not right */
2179 return initio_msgout_reject(host);
2180 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
2181 host->msg[3] = 0;
1da177e4 2182 } else {
72d39fea
AC		 2183 if (initio_msgin_sync(host) == 0 &&
2184 (host->active_tc->flags & TCF_SYNC_DONE)) {
2185 initio_sync_done(host);
2186 return initio_msgin_accept(host);
1da177e4
LT		 2187 }
2188 }
2189
72d39fea
AC		 2190 r = inb(host->addr + TUL_SSignal);
2191 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2192 host->addr + TUL_SSignal);
2193 if (initio_msgin_accept(host) != MSG_OUT)
2194 return host->phase;
1da177e4 2195 /* sync msg out */
72d39fea 2196 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1da177e4 2197
72d39fea 2198 initio_sync_done(host);
1da177e4 2199
72d39fea
AC		 2200 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2201 outb(3, host->addr + TUL_SFifo);
2202 outb(1, host->addr + TUL_SFifo);
2203 outb(host->msg[2], host->addr + TUL_SFifo);
2204 outb(host->msg[3], host->addr + TUL_SFifo);
2205 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2206 return wait_tulip(host);
1da177e4 2207 }
72d39fea
AC		 2208 if (host->msg[0] != 2 || host->msg[1] != 3)
2209 return initio_msgout_reject(host);
1da177e4 2210 /* if it's WIDE DATA XFER REQ */
72d39fea
AC		 2211 if (host->active_tc->flags & TCF_NO_WDTR) {
2212 host->msg[2] = 0;
1da177e4 2213 } else {
72d39fea
AC		 2214 if (host->msg[2] > 2) /* > 32 bits */
2215 return initio_msgout_reject(host);
2216 if (host->msg[2] == 2) { /* == 32 */
2217 host->msg[2] = 1;
1da177e4 2218 } else {
72d39fea
AC		 2219 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2220 wdtr_done(host);
2221 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2222 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2223 return initio_msgin_accept(host);
1da177e4
LT		 2224 }
2225 }
2226 }
72d39fea 2227 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
1da177e4 2228
72d39fea
AC		 2229 if (initio_msgin_accept(host) != MSG_OUT)
2230 return host->phase;
1da177e4 2231 /* WDTR msg out */
72d39fea
AC		 2232 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2233 outb(2, host->addr + TUL_SFifo);
2234 outb(3, host->addr + TUL_SFifo);
2235 outb(host->msg[2], host->addr + TUL_SFifo);
2236 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2237 return wait_tulip(host);
1da177e4
LT		 2238}
2239
72d39fea 2240static int initio_msgin_sync(struct initio_host * host)
1da177e4
LT		 2241{
2242 char default_period;
2243
72d39fea
AC		 2244 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2245 if (host->msg[3] > MAX_OFFSET) {
2246 host->msg[3] = MAX_OFFSET;
2247 if (host->msg[2] < default_period) {
2248 host->msg[2] = default_period;
1da177e4
LT		 2249 return 1;
2250 }
72d39fea
AC		 2251 if (host->msg[2] >= 59) /* Change to async */
2252 host->msg[3] = 0;
1da177e4
LT		 2253 return 1;
2254 }
2255 /* offset requests asynchronous transfers ? */
72d39fea 2256 if (host->msg[3] == 0) {
1da177e4
LT		 2257 return 0;
2258 }
72d39fea
AC		 2259 if (host->msg[2] < default_period) {
2260 host->msg[2] = default_period;
1da177e4
LT		 2261 return 1;
2262 }
72d39fea
AC		 2263 if (host->msg[2] >= 59) {
2264 host->msg[3] = 0;
1da177e4
LT		 2265 return 1;
2266 }
2267 return 0;
2268}
2269
72d39fea 2270static int wdtr_done(struct initio_host * host)
1da177e4 2271{
72d39fea
AC		 2272 host->active_tc->flags &= ~TCF_SYNC_DONE;
2273 host->active_tc->flags |= TCF_WDTR_DONE;
1da177e4 2274
72d39fea
AC		 2275 host->active_tc->js_period = 0;
2276 if (host->msg[2]) /* if 16 bit */
2277 host->active_tc->js_period |= TSC_WIDE_SCSI;
2278 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2279 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2280 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
1da177e4
LT		 2281
2282 return 1;
2283}
2284
72d39fea 2285static int initio_sync_done(struct initio_host * host)
1da177e4
LT		 2286{
2287 int i;
2288
72d39fea 2289 host->active_tc->flags |= TCF_SYNC_DONE;
1da177e4 2290
72d39fea
AC		 2291 if (host->msg[3]) {
2292 host->active_tc->js_period |= host->msg[3];
1da177e4 2293 for (i = 0; i < 8; i++) {
72d39fea 2294 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
1da177e4
LT		 2295 break;
2296 }
72d39fea
AC		 2297 host->active_tc->js_period |= (i << 4);
2298 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
1da177e4 2299 }
72d39fea
AC		 2300 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2301 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
1da177e4 2302
72d39fea 2303 return -1;
1da177e4
LT		 2304}
2305
2306
72d39fea 2307static int initio_post_scsi_rst(struct initio_host * host)
1da177e4 2308{
72d39fea
AC		 2309 struct scsi_ctrl_blk *scb;
2310 struct target_control *active_tc;
1da177e4
LT		 2311 int i;
2312
72d39fea
AC		 2313 host->active = NULL;
2314 host->active_tc = NULL;
2315 host->flags = 0;
1da177e4 2316
72d39fea
AC		 2317 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2318 scb->hastat = HOST_BAD_PHAS;
2319 initio_append_done_scb(host, scb);
1da177e4
LT		 2320 }
2321 /* clear sync done flag */
72d39fea
AC		 2322 active_tc = &host->targets[0];
2323 for (i = 0; i < host->max_tar; active_tc++, i++) {
2324 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1da177e4 2325 /* Initialize the sync. xfer register values to an asyn xfer */
72d39fea
AC		 2326 active_tc->js_period = 0;
2327 active_tc->sconfig0 = host->sconf1;
2328 host->act_tags[0] = 0; /* 07/22/98 */
2329 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
1da177e4
LT		 2330 } /* for */
2331
72d39fea 2332 return -1;
1da177e4
LT		 2333}
2334
72d39fea 2335static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4 2336{
72d39fea
AC		 2337 scb->status |= SCB_SELECT;
2338 scb->next_state = 0x1;
2339 host->active = scb;
2340 host->active_tc = &host->targets[scb->target];
2341 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
1da177e4
LT		 2342}
2343
2344
72d39fea 2345static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4
LT		 2346{
2347 int i;
2348
72d39fea
AC		 2349 scb->status |= SCB_SELECT;
2350 scb->next_state = 0x2;
1da177e4 2351
72d39fea
AC		 2352 outb(scb->ident, host->addr + TUL_SFifo);
2353 for (i = 0; i < (int) scb->cdblen; i++)
2354 outb(scb->cdb[i], host->addr + TUL_SFifo);
2355 host->active_tc = &host->targets[scb->target];
2356 host->active = scb;
2357 outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
1da177e4
LT		 2358}
2359
72d39fea 2360static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
1da177e4
LT		 2361{
2362 int i;
2363
72d39fea
AC		 2364 scb->status |= SCB_SELECT;
2365 scb->next_state = 0x2;
2366
2367 outb(scb->ident, host->addr + TUL_SFifo);
2368 outb(scb->tagmsg, host->addr + TUL_SFifo);
2369 outb(scb->tagid, host->addr + TUL_SFifo);
2370 for (i = 0; i < scb->cdblen; i++)
2371 outb(scb->cdb[i], host->addr + TUL_SFifo);
2372 host->active_tc = &host->targets[scb->target];
2373 host->active = scb;
2374 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
1da177e4
LT		 2375}
2376
72d39fea
AC		 2377/**
2378 * initio_bus_device_reset - SCSI Bus Device Reset
2379 * @host: InitIO host to reset
2380 *
2381 * Perform a device reset and abort all pending SCBs for the
2382 * victim device
2383 */
2384int initio_bus_device_reset(struct initio_host * host)
1da177e4 2385{
72d39fea
AC		 2386 struct scsi_ctrl_blk *scb = host->active;
2387 struct target_control *active_tc = host->active_tc;
2388 struct scsi_ctrl_blk *tmp, *prev;
2389 u8 tar;
1da177e4 2390
72d39fea
AC		 2391 if (host->phase != MSG_OUT)
2392 return int_initio_bad_seq(host); /* Unexpected phase */
2393
2394 initio_unlink_pend_scb(host, scb);
2395 initio_release_scb(host, scb);
1da177e4
LT		 2396
2397
72d39fea
AC		 2398 tar = scb->target; /* target */
2399 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
1da177e4
LT		 2400 /* clr sync. nego & WDTR flags 07/22/98 */
2401
2402 /* abort all SCB with same target */
72d39fea
AC		 2403 prev = tmp = host->first_busy; /* Check Busy queue */
2404 while (tmp != NULL) {
2405 if (tmp->target == tar) {
1da177e4 2406 /* unlink it */
72d39fea
AC		 2407 if (tmp == host->first_busy) {
2408 if ((host->first_busy = tmp->next) == NULL)
2409 host->last_busy = NULL;
1da177e4 2410 } else {
72d39fea
AC		 2411 prev->next = tmp->next;
2412 if (tmp == host->last_busy)
2413 host->last_busy = prev;
1da177e4 2414 }
72d39fea
AC		 2415 tmp->hastat = HOST_ABORTED;
2416 initio_append_done_scb(host, tmp);
1da177e4
LT		 2417 }
2418 /* Previous haven't change */
2419 else {
72d39fea 2420 prev = tmp;
1da177e4 2421 }
72d39fea 2422 tmp = tmp->next;
1da177e4 2423 }
72d39fea
AC		 2424 outb(MSG_DEVRST, host->addr + TUL_SFifo);
2425 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2426 return initio_wait_disc(host);
1da177e4
LT		 2427
2428}
2429
72d39fea 2430static int initio_msgin_accept(struct initio_host * host)
1da177e4 2431{
72d39fea
AC		 2432 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2433 return wait_tulip(host);
1da177e4
LT		 2434}
2435
72d39fea 2436static int wait_tulip(struct initio_host * host)
1da177e4
LT		 2437{
2438
72d39fea
AC		 2439 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2440 & TSS_INT_PENDING))
2441 cpu_relax();
1da177e4 2442
72d39fea
AC		 2443 host->jsint = inb(host->addr + TUL_SInt);
2444 host->phase = host->jsstatus0 & TSS_PH_MASK;
2445 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1da177e4 2446
72d39fea
AC		 2447 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
2448 return int_initio_resel(host);
2449 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
2450 return int_initio_busfree(host);
2451 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2452 return int_initio_scsi_rst(host);
2453
2454 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2455 if (host->flags & HCF_EXPECT_DONE_DISC) {
2456 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2457 initio_unlink_busy_scb(host, host->active);
2458 host->active->hastat = 0;
2459 initio_append_done_scb(host, host->active);
2460 host->active = NULL;
2461 host->active_tc = NULL;
2462 host->flags &= ~HCF_EXPECT_DONE_DISC;
2463 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2464 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2465 return -1;
1da177e4 2466 }
72d39fea
AC		 2467 if (host->flags & HCF_EXPECT_DISC) {
2468 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2469 host->active = NULL;
2470 host->active_tc = NULL;
2471 host->flags &= ~HCF_EXPECT_DISC;
2472 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2473 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2474 return -1;
1da177e4 2475 }
72d39fea 2476 return int_initio_busfree(host);
1da177e4 2477 }
72d39fea
AC		 2478 /* The old code really does the below. Can probably be removed */
2479 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2480 return host->phase;
2481 return host->phase;
1da177e4 2482}
1da177e4 2483
72d39fea
AC		 2484static int initio_wait_disc(struct initio_host * host)
2485{
2486 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2487 cpu_relax();
1da177e4 2488
72d39fea 2489 host->jsint = inb(host->addr + TUL_SInt);
1da177e4 2490
72d39fea
AC		 2491 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2492 return int_initio_scsi_rst(host);
2493 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2494 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2495 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2496 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2497 host->active = NULL;
2498 return -1;
1da177e4 2499 }
72d39fea 2500 return initio_bad_seq(host);
1da177e4
LT		 2501}
2502
72d39fea 2503static int initio_wait_done_disc(struct initio_host * host)
1da177e4 2504{
72d39fea
AC		 2505 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2506 & TSS_INT_PENDING))
2507 cpu_relax();
1da177e4 2508
72d39fea 2509 host->jsint = inb(host->addr + TUL_SInt);
1da177e4 2510
72d39fea
AC		 2511 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2512 return int_initio_scsi_rst(host);
2513 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2514 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2515 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2516 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2517 initio_unlink_busy_scb(host, host->active);
1da177e4 2518
72d39fea
AC		 2519 initio_append_done_scb(host, host->active);
2520 host->active = NULL;
2521 return -1;
1da177e4 2522 }
72d39fea 2523 return initio_bad_seq(host);
1da177e4
LT		 2524}
2525
72d39fea
AC		 2526/**
2527 * i91u_intr - IRQ handler
2528 * @irqno: IRQ number
2529 * @dev_id: IRQ identifier
2530 *
2531 * Take the relevant locks and then invoke the actual isr processing
2532 * code under the lock.
2533 */
2534
7d12e780 2535static irqreturn_t i91u_intr(int irqno, void *dev_id)
1da177e4
LT		 2536{
2537 struct Scsi_Host *dev = dev_id;
2538 unsigned long flags;
72d39fea 2539 int r;
1da177e4
LT		 2540
2541 spin_lock_irqsave(dev->host_lock, flags);
72d39fea 2542 r = initio_isr((struct initio_host *)dev->hostdata);
1da177e4 2543 spin_unlock_irqrestore(dev->host_lock, flags);
72d39fea
AC		 2544 if (r)
2545 return IRQ_HANDLED;
2546 else
2547 return IRQ_NONE;
1da177e4
LT		 2548}
2549
1da177e4 2550
72d39fea
AC		 2551/**
2552 * initio_build_scb - Build the mappings and SCB
2553 * @host: InitIO host taking the command
2554 * @cblk: Firmware command block
2555 * @cmnd: SCSI midlayer command block
2556 *
2557 * Translate the abstract SCSI command into a firmware command block
2558 * suitable for feeding to the InitIO host controller. This also requires
2559 * we build the scatter gather lists and ensure they are mapped properly.
2560 */
1da177e4 2561
72d39fea 2562static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
1da177e4 2563{ /* Create corresponding SCB */
72d39fea
AC		 2564 struct scatterlist *sglist;
2565 struct sg_entry *sg; /* Pointer to SG list */
a258c85d 2566 int i, nseg;
72d39fea 2567 long total_len;
1da177e4
LT		 2568 dma_addr_t dma_addr;
2569
72d39fea
AC		 2570 /* Fill in the command headers */
2571 cblk->post = i91uSCBPost; /* i91u's callback routine */
2572 cblk->srb = cmnd;
2573 cblk->opcode = ExecSCSI;
2574 cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2575 cblk->target = cmnd->device->id;
2576 cblk->lun = cmnd->device->lun;
2577 cblk->ident = cmnd->device->lun | DISC_ALLOW;
1da177e4 2578
72d39fea 2579 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
1da177e4 2580
72d39fea
AC		 2581 /* Map the sense buffer into bus memory */
2582 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2583 SENSE_SIZE, DMA_FROM_DEVICE);
423eef6f
GG		 2584 cblk->senseptr = (u32)dma_addr;
2585 cblk->senselen = SENSE_SIZE;
72d39fea
AC		 2586 cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2587 cblk->cdblen = cmnd->cmd_len;
2588
2589 /* Clear the returned status */
2590 cblk->hastat = 0;
2591 cblk->tastat = 0;
2592 /* Command the command */
64a87b24 2593 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
72d39fea
AC		 2594
2595 /* Set up tags */
2596 if (cmnd->device->tagged_supported) { /* Tag Support */
2597 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
1da177e4 2598 } else {
72d39fea 2599 cblk->tagmsg = 0; /* No tag support */
1da177e4 2600 }
72d39fea 2601
1da177e4 2602 /* todo handle map_sg error */
a258c85d
FT		 2603 nseg = scsi_dma_map(cmnd);
2604 BUG_ON(nseg < 0);
2605 if (nseg) {
72d39fea
AC		 2606 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2607 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
1da177e4 2608 DMA_BIDIRECTIONAL);
423eef6f 2609 cblk->bufptr = (u32)dma_addr;
72d39fea
AC		 2610 cmnd->SCp.dma_handle = dma_addr;
2611
e2d435ea 2612 cblk->sglen = nseg;
72d39fea
AC		 2613
2614 cblk->flags |= SCF_SG; /* Turn on SG list flag */
a258c85d
FT		 2615 total_len = 0;
2616 sg = &cblk->sglist[0];
2617 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
72d39fea 2618 sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
423eef6f
GG		 2619 sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2620 total_len += sg_dma_len(sglist);
a169e637 2621 ++sg;
72d39fea
AC		 2622 }
2623
a258c85d
FT		 2624 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2625 total_len : scsi_bufflen(cmnd);
72d39fea
AC		 2626 } else { /* No data transfer required */
2627 cblk->buflen = 0;
2628 cblk->sglen = 0;
2629 }
2630}
2631
2632/**
2633 * i91u_queuecommand - Queue a new command if possible
2634 * @cmd: SCSI command block from the mid layer
2635 * @done: Completion handler
2636 *
2637 * Attempts to queue a new command with the host adapter. Will return
2638 * zero if successful or indicate a host busy condition if not (which
2639 * will cause the mid layer to call us again later with the command)
2640 */
1da177e4 2641
f281233d 2642static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
1da177e4
LT		 2643 void (*done)(struct scsi_cmnd *))
2644{
72d39fea
AC		 2645 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2646 struct scsi_ctrl_blk *cmnd;
1da177e4
LT		 2647
2648 cmd->scsi_done = done;
2649
72d39fea
AC		 2650 cmnd = initio_alloc_scb(host);
2651 if (!cmnd)
1da177e4
LT		 2652 return SCSI_MLQUEUE_HOST_BUSY;
2653
72d39fea
AC		 2654 initio_build_scb(host, cmnd, cmd);
2655 initio_exec_scb(host, cmnd);
1da177e4
LT		 2656 return 0;
2657}
2658
f281233d
JG		 2659static DEF_SCSI_QCMD(i91u_queuecommand)
2660
72d39fea
AC		 2661/**
2662 * i91u_bus_reset - reset the SCSI bus
2663 * @cmnd: Command block we want to trigger the reset for
2664 *
2665 * Initiate a SCSI bus reset sequence
1da177e4 2666 */
1da177e4 2667
72d39fea 2668static int i91u_bus_reset(struct scsi_cmnd * cmnd)
1da177e4 2669{
72d39fea 2670 struct initio_host *host;
1da177e4 2671
72d39fea 2672 host = (struct initio_host *) cmnd->device->host->hostdata;
68b3aa7c 2673
72d39fea
AC		 2674 spin_lock_irq(cmnd->device->host->host_lock);
2675 initio_reset_scsi(host, 0);
2676 spin_unlock_irq(cmnd->device->host->host_lock);
68b3aa7c 2677
1da177e4
LT		 2678 return SUCCESS;
2679}
2680
72d39fea
AC		 2681/**
2682 * i91u_biospararm - return the "logical geometry
2683 * @sdev: SCSI device
2684 * @dev; Matching block device
2685 * @capacity: Sector size of drive
2686 * @info_array: Return space for BIOS geometry
2687 *
2688 * Map the device geometry in a manner compatible with the host
2689 * controller BIOS behaviour.
2690 *
2691 * FIXME: limited to 2^32 sector devices.
1da177e4 2692 */
72d39fea 2693
1da177e4
LT		 2694static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2695 sector_t capacity, int *info_array)
2696{
72d39fea
AC		 2697 struct initio_host *host; /* Point to Host adapter control block */
2698 struct target_control *tc;
1da177e4 2699
72d39fea
AC		 2700 host = (struct initio_host *) sdev->host->hostdata;
2701 tc = &host->targets[sdev->id];
1da177e4 2702
72d39fea
AC		 2703 if (tc->heads) {
2704 info_array[0] = tc->heads;
2705 info_array[1] = tc->sectors;
2706 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
1da177e4 2707 } else {
72d39fea 2708 if (tc->drv_flags & TCF_DRV_255_63) {
1da177e4
LT		 2709 info_array[0] = 255;
2710 info_array[1] = 63;
2711 info_array[2] = (unsigned long)capacity / 255 / 63;
2712 } else {
2713 info_array[0] = 64;
2714 info_array[1] = 32;
2715 info_array[2] = (unsigned long)capacity >> 11;
2716 }
2717 }
2718
2719#if defined(DEBUG_BIOSPARAM)
2720 if (i91u_debug & debug_biosparam) {
2721 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2722 info_array[0], info_array[1], info_array[2]);
2723 printk("WARNING: check, if the bios geometry is correct.\n");
2724 }
2725#endif
2726
2727 return 0;
2728}
2729
72d39fea
AC		 2730/**
2731 * i91u_unmap_scb - Unmap a command
2732 * @pci_dev: PCI device the command is for
2733 * @cmnd: The command itself
2734 *
2735 * Unmap any PCI mapping/IOMMU resources allocated when the command
2736 * was mapped originally as part of initio_build_scb
2737 */
2738
2739static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
1da177e4
LT		 2740{
2741 /* auto sense buffer */
2742 if (cmnd->SCp.ptr) {
2743 dma_unmap_single(&pci_dev->dev,
2744 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2745 SENSE_SIZE, DMA_FROM_DEVICE);
2746 cmnd->SCp.ptr = NULL;
2747 }
2748
2749 /* request buffer */
a258c85d 2750 if (scsi_sg_count(cmnd)) {
1da177e4 2751 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
72d39fea 2752 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
1da177e4
LT		 2753 DMA_BIDIRECTIONAL);
2754
a258c85d 2755 scsi_dma_unmap(cmnd);
1da177e4
LT		 2756 }
2757}
2758
72d39fea
AC		 2759/**
2760 * i91uSCBPost - SCSI callback
2761 * @host: Pointer to host adapter control block.
2762 * @cmnd: Pointer to SCSI control block.
2763 *
2764 * This is callback routine be called when tulip finish one
2765 * SCSI command.
2766 */
1da177e4 2767
72d39fea
AC		 2768static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2769{
2770 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2771 struct initio_host *host;
2772 struct scsi_ctrl_blk *cblk;
1da177e4 2773
72d39fea
AC		 2774 host = (struct initio_host *) host_mem;
2775 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2776 if ((cmnd = cblk->srb) == NULL) {
2777 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2778 WARN_ON(1);
2779 initio_release_scb(host, cblk); /* Release SCB for current channel */
1da177e4
LT		 2780 return;
2781 }
72d39fea
AC		 2782
2783 /*
2784 * Remap the firmware error status into a mid layer one
2785 */
2786 switch (cblk->hastat) {
1da177e4
LT		 2787 case 0x0:
2788 case 0xa: /* Linked command complete without error and linked normally */
2789 case 0xb: /* Linked command complete without error interrupt generated */
72d39fea 2790 cblk->hastat = 0;
1da177e4
LT		 2791 break;
2792
2793 case 0x11: /* Selection time out-The initiator selection or target
2794 reselection was not complete within the SCSI Time out period */
72d39fea 2795 cblk->hastat = DID_TIME_OUT;
1da177e4
LT		 2796 break;
2797
2798 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2799 phase sequence was requested by the target. The host adapter
2800 will generate a SCSI Reset Condition, notifying the host with
2801 a SCRD interrupt */
72d39fea 2802 cblk->hastat = DID_RESET;
1da177e4
LT		 2803 break;
2804
2805 case 0x1a: /* SCB Aborted. 07/21/98 */
72d39fea 2806 cblk->hastat = DID_ABORT;
1da177e4
LT		 2807 break;
2808
2809 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2810 than was allocated by the Data Length field or the sum of the
2811 Scatter / Gather Data Length fields. */
2812 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2813 case 0x16: /* Invalid SCB Operation Code. */
2814
2815 default:
72d39fea
AC		 2816 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2817 cblk->hastat = DID_ERROR; /* Couldn't find any better */
1da177e4
LT		 2818 break;
2819 }
2820
72d39fea 2821 cmnd->result = cblk->tastat | (cblk->hastat << 16);
72d39fea
AC		 2822 i91u_unmap_scb(host->pci_dev, cmnd);
2823 cmnd->scsi_done(cmnd); /* Notify system DONE */
2824 initio_release_scb(host, cblk); /* Release SCB for current channel */
2825}
2826
2827static struct scsi_host_template initio_template = {
2828 .proc_name = "INI9100U",
2829 .name = "Initio INI-9X00U/UW SCSI device driver",
2830 .queuecommand = i91u_queuecommand,
2831 .eh_bus_reset_handler = i91u_bus_reset,
2832 .bios_param = i91u_biosparam,
2833 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2834 .this_id = 1,
2835 .sg_tablesize = SG_ALL,
2836 .cmd_per_lun = 1,
2837 .use_clustering = ENABLE_CLUSTERING,
2838};
2839
2840static int initio_probe_one(struct pci_dev *pdev,
2841 const struct pci_device_id *id)
2842{
2843 struct Scsi_Host *shost;
2844 struct initio_host *host;
2845 u32 reg;
2846 u16 bios_seg;
2847 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2848 int num_scb, i, error;
2849
2850 error = pci_enable_device(pdev);
2851 if (error)
2852 return error;
2853
2854 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2855 bios_seg = (u16) (reg & 0xFF);
2856 if (((reg & 0xFF00) >> 8) == 0xFF)
2857 reg = 0;
2858 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2859
284901a9 2860 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
72d39fea
AC		 2861 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2862 error = -ENODEV;
2863 goto out_disable_device;
2864 }
2865 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2866 if (!shost) {
2867 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2868 error = -ENOMEM;
2869 goto out_disable_device;
2870 }
2871 host = (struct initio_host *)shost->hostdata;
2872 memset(host, 0, sizeof(struct initio_host));
99f1f534 2873 host->addr = pci_resource_start(pdev, 0);
e2d435ea 2874 host->bios_addr = bios_seg;
1da177e4 2875
72d39fea
AC		 2876 if (!request_region(host->addr, 256, "i91u")) {
2877 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2878 error = -ENODEV;
2879 goto out_host_put;
1da177e4
LT		 2880 }
2881
72d39fea
AC		 2882 if (initio_tag_enable) /* 1.01i */
2883 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2884 else
2885 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
1da177e4 2886
72d39fea
AC		 2887 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2888 i = num_scb * sizeof(struct scsi_ctrl_blk);
2889 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2890 break;
2891 }
2892
2893 if (!scb) {
2894 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2895 error = -ENOMEM;
2896 goto out_release_region;
2897 }
1da177e4 2898
e9e42faf
AC		 2899 host->pci_dev = pdev;
2900
e2d435ea
SS		 2901 host->semaph = 1;
2902 spin_lock_init(&host->semaph_lock);
72d39fea
AC		 2903 host->num_scbs = num_scb;
2904 host->scb = scb;
2905 host->next_pending = scb;
2906 host->next_avail = scb;
2907 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2908 tmp->tagid = i;
2909 if (i != 0)
2910 prev->next = tmp;
2911 prev = tmp;
2912 }
2913 prev->next = NULL;
2914 host->scb_end = tmp;
2915 host->first_avail = scb;
2916 host->last_avail = prev;
e9e42faf 2917 spin_lock_init(&host->avail_lock);
72d39fea 2918
e2d435ea 2919 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
72d39fea
AC		 2920
2921 host->jsstatus0 = 0;
2922
2923 shost->io_port = host->addr;
2924 shost->n_io_port = 0xff;
2925 shost->can_queue = num_scb; /* 03/05/98 */
2926 shost->unique_id = host->addr;
2927 shost->max_id = host->max_tar;
2928 shost->max_lun = 32; /* 10/21/97 */
2929 shost->irq = pdev->irq;
2930 shost->this_id = host->scsi_id; /* Assign HCS index */
2931 shost->base = host->addr;
2932 shost->sg_tablesize = TOTAL_SG_ENTRY;
2933
2934 error = request_irq(pdev->irq, i91u_intr, IRQF_DISABLED|IRQF_SHARED, "i91u", shost);
2935 if (error < 0) {
2936 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2937 goto out_free_scbs;
2938 }
2939
2940 pci_set_drvdata(pdev, shost);
72d39fea
AC		 2941
2942 error = scsi_add_host(shost, &pdev->dev);
2943 if (error)
2944 goto out_free_irq;
2945 scsi_scan_host(shost);
2946 return 0;
2947out_free_irq:
2948 free_irq(pdev->irq, shost);
2949out_free_scbs:
2950 kfree(host->scb);
2951out_release_region:
2952 release_region(host->addr, 256);
2953out_host_put:
2954 scsi_host_put(shost);
2955out_disable_device:
2956 pci_disable_device(pdev);
2957 return error;
2958}
2959
2960/**
2961 * initio_remove_one - control shutdown
2962 * @pdev: PCI device being released
2963 *
2964 * Release the resources assigned to this adapter after it has
2965 * finished being used.
1da177e4 2966 */
72d39fea
AC		 2967
2968static void initio_remove_one(struct pci_dev *pdev)
1da177e4 2969{
72d39fea
AC		 2970 struct Scsi_Host *host = pci_get_drvdata(pdev);
2971 struct initio_host *s = (struct initio_host *)host->hostdata;
2972 scsi_remove_host(host);
2973 free_irq(pdev->irq, host);
2974 release_region(s->addr, 256);
2975 scsi_host_put(host);
2976 pci_disable_device(pdev);
1da177e4 2977}
72d39fea
AC		 2978
2979MODULE_LICENSE("GPL");
2980
2981static struct pci_device_id initio_pci_tbl[] = {
2982 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2983 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2984 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2985 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2986 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2987 {0,}
2988};
2989MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2990
2991static struct pci_driver initio_pci_driver = {
2992 .name = "initio",
2993 .id_table = initio_pci_tbl,
2994 .probe = initio_probe_one,
2995 .remove = __devexit_p(initio_remove_one),
1da177e4 2996};
1da177e4 2997
72d39fea
AC		 2998static int __init initio_init_driver(void)
2999{
3000 return pci_register_driver(&initio_pci_driver);
3001}
3002
3003static void __exit initio_exit_driver(void)
3004{
3005 pci_unregister_driver(&initio_pci_driver);
3006}
3007
3008MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
3009MODULE_AUTHOR("Initio Corporation");
3010MODULE_LICENSE("GPL");
3011
3012module_init(initio_init_driver);
3013module_exit(initio_exit_driver);
ubuntu-bionic-kernel mirror