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futex: Correct queue_me and unqueue_me commentary
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / a100u2w.c
blob208d6df9ed5905d36b8fa56a82e95ae2f085ac5a
1 /*
2 * Initio A100 device driver for Linux.
3 *
4 * Copyright (c) 1994-1998 Initio Corporation
5 * Copyright (c) 2003-2004 Christoph Hellwig
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, write to
20 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
26 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * Revision History:
37 * 07/02/98 hl - v.91n Initial drivers.
38 * 09/14/98 hl - v1.01 Support new Kernel.
39 * 09/22/98 hl - v1.01a Support reset.
40 * 09/24/98 hl - v1.01b Fixed reset.
41 * 10/05/98 hl - v1.02 split the source code and release.
42 * 12/19/98 bv - v1.02a Use spinlocks for 2.1.95 and up
43 * 01/31/99 bv - v1.02b Use mdelay instead of waitForPause
44 * 08/08/99 bv - v1.02c Use waitForPause again.
45 * 06/25/02 Doug Ledford <dledford@redhat.com> - v1.02d
46 * - Remove limit on number of controllers
47 * - Port to DMA mapping API
48 * - Clean up interrupt handler registration
49 * - Fix memory leaks
50 * - Fix allocation of scsi host structs and private data
51 * 11/18/03 Christoph Hellwig <hch@lst.de>
52 * - Port to new probing API
53 * - Fix some more leaks in init failure cases
54 * 9/28/04 Christoph Hellwig <hch@lst.de>
55 * - merge the two source files
56 * - remove internal queueing code
57 * 14/06/07 Alan Cox <alan@lxorguk.ukuu.org.uk>
58 * - Grand cleanup and Linuxisation
59 */
60
61 #include <linux/module.h>
62 #include <linux/errno.h>
63 #include <linux/delay.h>
64 #include <linux/interrupt.h>
65 #include <linux/pci.h>
66 #include <linux/init.h>
67 #include <linux/blkdev.h>
68 #include <linux/spinlock.h>
69 #include <linux/kernel.h>
70 #include <linux/string.h>
71 #include <linux/ioport.h>
72 #include <linux/slab.h>
73 #include <linux/dma-mapping.h>
74
75 #include <asm/io.h>
76 #include <asm/irq.h>
77
78 #include <scsi/scsi.h>
79 #include <scsi/scsi_cmnd.h>
80 #include <scsi/scsi_device.h>
81 #include <scsi/scsi_host.h>
82
83 #include "a100u2w.h"
84
85
86 static struct orc_scb *__orc_alloc_scb(struct orc_host * host);
87 static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb);
88
89 static struct orc_nvram nvram, *nvramp = &nvram;
90
91 static u8 default_nvram[64] =
92 {
93 /*----------header -------------*/
94 0x01, /* 0x00: Sub System Vendor ID 0 */
95 0x11, /* 0x01: Sub System Vendor ID 1 */
96 0x60, /* 0x02: Sub System ID 0 */
97 0x10, /* 0x03: Sub System ID 1 */
98 0x00, /* 0x04: SubClass */
99 0x01, /* 0x05: Vendor ID 0 */
100 0x11, /* 0x06: Vendor ID 1 */
101 0x60, /* 0x07: Device ID 0 */
102 0x10, /* 0x08: Device ID 1 */
103 0x00, /* 0x09: Reserved */
104 0x00, /* 0x0A: Reserved */
105 0x01, /* 0x0B: Revision of Data Structure */
106 /* -- Host Adapter Structure --- */
107 0x01, /* 0x0C: Number Of SCSI Channel */
108 0x01, /* 0x0D: BIOS Configuration 1 */
109 0x00, /* 0x0E: BIOS Configuration 2 */
110 0x00, /* 0x0F: BIOS Configuration 3 */
111 /* --- SCSI Channel 0 Configuration --- */
112 0x07, /* 0x10: H/A ID */
113 0x83, /* 0x11: Channel Configuration */
114 0x20, /* 0x12: MAX TAG per target */
115 0x0A, /* 0x13: SCSI Reset Recovering time */
116 0x00, /* 0x14: Channel Configuration4 */
117 0x00, /* 0x15: Channel Configuration5 */
118 /* SCSI Channel 0 Target Configuration */
119 /* 0x16-0x25 */
120 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
121 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
122 /* --- SCSI Channel 1 Configuration --- */
123 0x07, /* 0x26: H/A ID */
124 0x83, /* 0x27: Channel Configuration */
125 0x20, /* 0x28: MAX TAG per target */
126 0x0A, /* 0x29: SCSI Reset Recovering time */
127 0x00, /* 0x2A: Channel Configuration4 */
128 0x00, /* 0x2B: Channel Configuration5 */
129 /* SCSI Channel 1 Target Configuration */
130 /* 0x2C-0x3B */
131 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
132 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
133 0x00, /* 0x3C: Reserved */
134 0x00, /* 0x3D: Reserved */
135 0x00, /* 0x3E: Reserved */
136 0x00 /* 0x3F: Checksum */
137 };
138
139
140 static u8 wait_chip_ready(struct orc_host * host)
141 {
142 int i;
143
144 for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
145 if (inb(host->base + ORC_HCTRL) & HOSTSTOP) /* Wait HOSTSTOP set */
146 return 1;
147 mdelay(100);
148 }
149 return 0;
150 }
151
152 static u8 wait_firmware_ready(struct orc_host * host)
153 {
154 int i;
155
156 for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
157 if (inb(host->base + ORC_HSTUS) & RREADY) /* Wait READY set */
158 return 1;
159 mdelay(100); /* wait 100ms before try again */
160 }
161 return 0;
162 }
163
164 /***************************************************************************/
165 static u8 wait_scsi_reset_done(struct orc_host * host)
166 {
167 int i;
168
169 for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
170 if (!(inb(host->base + ORC_HCTRL) & SCSIRST)) /* Wait SCSIRST done */
171 return 1;
172 mdelay(100); /* wait 100ms before try again */
173 }
174 return 0;
175 }
176
177 /***************************************************************************/
178 static u8 wait_HDO_off(struct orc_host * host)
179 {
180 int i;
181
182 for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
183 if (!(inb(host->base + ORC_HCTRL) & HDO)) /* Wait HDO off */
184 return 1;
185 mdelay(100); /* wait 100ms before try again */
186 }
187 return 0;
188 }
189
190 /***************************************************************************/
191 static u8 wait_hdi_set(struct orc_host * host, u8 * data)
192 {
193 int i;
194
195 for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
196 if ((*data = inb(host->base + ORC_HSTUS)) & HDI)
197 return 1; /* Wait HDI set */
198 mdelay(100); /* wait 100ms before try again */
199 }
200 return 0;
201 }
202
203 /***************************************************************************/
204 static unsigned short orc_read_fwrev(struct orc_host * host)
205 {
206 u16 version;
207 u8 data;
208
209 outb(ORC_CMD_VERSION, host->base + ORC_HDATA);
210 outb(HDO, host->base + ORC_HCTRL);
211 if (wait_HDO_off(host) == 0) /* Wait HDO off */
212 return 0;
213
214 if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
215 return 0;
216 version = inb(host->base + ORC_HDATA);
217 outb(data, host->base + ORC_HSTUS); /* Clear HDI */
218
219 if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
220 return 0;
221 version |= inb(host->base + ORC_HDATA) << 8;
222 outb(data, host->base + ORC_HSTUS); /* Clear HDI */
223
224 return version;
225 }
226
227 /***************************************************************************/
228 static u8 orc_nv_write(struct orc_host * host, unsigned char address, unsigned char value)
229 {
230 outb(ORC_CMD_SET_NVM, host->base + ORC_HDATA); /* Write command */
231 outb(HDO, host->base + ORC_HCTRL);
232 if (wait_HDO_off(host) == 0) /* Wait HDO off */
233 return 0;
234
235 outb(address, host->base + ORC_HDATA); /* Write address */
236 outb(HDO, host->base + ORC_HCTRL);
237 if (wait_HDO_off(host) == 0) /* Wait HDO off */
238 return 0;
239
240 outb(value, host->base + ORC_HDATA); /* Write value */
241 outb(HDO, host->base + ORC_HCTRL);
242 if (wait_HDO_off(host) == 0) /* Wait HDO off */
243 return 0;
244
245 return 1;
246 }
247
248 /***************************************************************************/
249 static u8 orc_nv_read(struct orc_host * host, u8 address, u8 *ptr)
250 {
251 unsigned char data;
252
253 outb(ORC_CMD_GET_NVM, host->base + ORC_HDATA); /* Write command */
254 outb(HDO, host->base + ORC_HCTRL);
255 if (wait_HDO_off(host) == 0) /* Wait HDO off */
256 return 0;
257
258 outb(address, host->base + ORC_HDATA); /* Write address */
259 outb(HDO, host->base + ORC_HCTRL);
260 if (wait_HDO_off(host) == 0) /* Wait HDO off */
261 return 0;
262
263 if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
264 return 0;
265 *ptr = inb(host->base + ORC_HDATA);
266 outb(data, host->base + ORC_HSTUS); /* Clear HDI */
267
268 return 1;
269
270 }
271
272 /**
273 * orc_exec_sb - Queue an SCB with the HA
274 * @host: host adapter the SCB belongs to
275 * @scb: SCB to queue for execution
276 */
277
278 static void orc_exec_scb(struct orc_host * host, struct orc_scb * scb)
279 {
280 scb->status = ORCSCB_POST;
281 outb(scb->scbidx, host->base + ORC_PQUEUE);
282 }
283
284
285 /**
286 * se2_rd_all - read SCSI parameters from EEPROM
287 * @host: Host whose EEPROM is being loaded
288 *
289 * Read SCSI H/A configuration parameters from serial EEPROM
290 */
291
292 static int se2_rd_all(struct orc_host * host)
293 {
294 int i;
295 u8 *np, chksum = 0;
296
297 np = (u8 *) nvramp;
298 for (i = 0; i < 64; i++, np++) { /* <01> */
299 if (orc_nv_read(host, (u8) i, np) == 0)
300 return -1;
301 }
302
303 /*------ Is ckecksum ok ? ------*/
304 np = (u8 *) nvramp;
305 for (i = 0; i < 63; i++)
306 chksum += *np++;
307
308 if (nvramp->CheckSum != (u8) chksum)
309 return -1;
310 return 1;
311 }
312
313 /**
314 * se2_update_all - update the EEPROM
315 * @host: Host whose EEPROM is being updated
316 *
317 * Update changed bytes in the EEPROM image.
318 */
319
320 static void se2_update_all(struct orc_host * host)
321 { /* setup default pattern */
322 int i;
323 u8 *np, *np1, chksum = 0;
324
325 /* Calculate checksum first */
326 np = (u8 *) default_nvram;
327 for (i = 0; i < 63; i++)
328 chksum += *np++;
329 *np = chksum;
330
331 np = (u8 *) default_nvram;
332 np1 = (u8 *) nvramp;
333 for (i = 0; i < 64; i++, np++, np1++) {
334 if (*np != *np1)
335 orc_nv_write(host, (u8) i, *np);
336 }
337 }
338
339 /**
340 * read_eeprom - load EEPROM
341 * @host: Host EEPROM to read
342 *
343 * Read the EEPROM for a given host. If it is invalid or fails
344 * the restore the defaults and use them.
345 */
346
347 static void read_eeprom(struct orc_host * host)
348 {
349 if (se2_rd_all(host) != 1) {
350 se2_update_all(host); /* setup default pattern */
351 se2_rd_all(host); /* load again */
352 }
353 }
354
355
356 /**
357 * orc_load_firmware - initialise firmware
358 * @host: Host to set up
359 *
360 * Load the firmware from the EEPROM into controller SRAM. This
361 * is basically a 4K block copy and then a 4K block read to check
362 * correctness. The rest is convulted by the indirect interfaces
363 * in the hardware
364 */
365
366 static u8 orc_load_firmware(struct orc_host * host)
367 {
368 u32 data32;
369 u16 bios_addr;
370 u16 i;
371 u8 *data32_ptr, data;
372
373
374 /* Set up the EEPROM for access */
375
376 data = inb(host->base + ORC_GCFG);
377 outb(data | EEPRG, host->base + ORC_GCFG); /* Enable EEPROM programming */
378 outb(0x00, host->base + ORC_EBIOSADR2);
379 outw(0x0000, host->base + ORC_EBIOSADR0);
380 if (inb(host->base + ORC_EBIOSDATA) != 0x55) {
381 outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
382 return 0;
383 }
384 outw(0x0001, host->base + ORC_EBIOSADR0);
385 if (inb(host->base + ORC_EBIOSDATA) != 0xAA) {
386 outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
387 return 0;
388 }
389
390 outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL); /* Enable SRAM programming */
391 data32_ptr = (u8 *) & data32;
392 data32 = cpu_to_le32(0); /* Initial FW address to 0 */
393 outw(0x0010, host->base + ORC_EBIOSADR0);
394 *data32_ptr = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
395 outw(0x0011, host->base + ORC_EBIOSADR0);
396 *(data32_ptr + 1) = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
397 outw(0x0012, host->base + ORC_EBIOSADR0);
398 *(data32_ptr + 2) = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
399 outw(*(data32_ptr + 2), host->base + ORC_EBIOSADR2);
400 outl(le32_to_cpu(data32), host->base + ORC_FWBASEADR); /* Write FW address */
401
402 /* Copy the code from the BIOS to the SRAM */
403
404 udelay(500); /* Required on Sun Ultra 5 ... 350 -> failures */
405 bios_addr = (u16) le32_to_cpu(data32); /* FW code locate at BIOS address + ? */
406 for (i = 0, data32_ptr = (u8 *) & data32; /* Download the code */
407 i < 0x1000; /* Firmware code size = 4K */
408 i++, bios_addr++) {
409 outw(bios_addr, host->base + ORC_EBIOSADR0);
410 *data32_ptr++ = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
411 if ((i % 4) == 3) {
412 outl(le32_to_cpu(data32), host->base + ORC_RISCRAM); /* Write every 4 bytes */
413 data32_ptr = (u8 *) & data32;
414 }
415 }
416
417 /* Go back and check they match */
418
419 outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL); /* Reset program count 0 */
420 bios_addr -= 0x1000; /* Reset the BIOS adddress */
421 for (i = 0, data32_ptr = (u8 *) & data32; /* Check the code */
422 i < 0x1000; /* Firmware code size = 4K */
423 i++, bios_addr++) {
424 outw(bios_addr, host->base + ORC_EBIOSADR0);
425 *data32_ptr++ = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
426 if ((i % 4) == 3) {
427 if (inl(host->base + ORC_RISCRAM) != le32_to_cpu(data32)) {
428 outb(PRGMRST, host->base + ORC_RISCCTL); /* Reset program to 0 */
429 outb(data, host->base + ORC_GCFG); /*Disable EEPROM programming */
430 return 0;
431 }
432 data32_ptr = (u8 *) & data32;
433 }
434 }
435
436 /* Success */
437 outb(PRGMRST, host->base + ORC_RISCCTL); /* Reset program to 0 */
438 outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
439 return 1;
440 }
441
442 /***************************************************************************/
443 static void setup_SCBs(struct orc_host * host)
444 {
445 struct orc_scb *scb;
446 int i;
447 struct orc_extended_scb *escb;
448 dma_addr_t escb_phys;
449
450 /* Setup SCB base and SCB Size registers */
451 outb(ORC_MAXQUEUE, host->base + ORC_SCBSIZE); /* Total number of SCBs */
452 /* SCB base address 0 */
453 outl(host->scb_phys, host->base + ORC_SCBBASE0);
454 /* SCB base address 1 */
455 outl(host->scb_phys, host->base + ORC_SCBBASE1);
456
457 /* setup scatter list address with one buffer */
458 scb = host->scb_virt;
459 escb = host->escb_virt;
460
461 for (i = 0; i < ORC_MAXQUEUE; i++) {
462 escb_phys = (host->escb_phys + (sizeof(struct orc_extended_scb) * i));
463 scb->sg_addr = cpu_to_le32((u32) escb_phys);
464 scb->sense_addr = cpu_to_le32((u32) escb_phys);
465 scb->escb = escb;
466 scb->scbidx = i;
467 scb++;
468 escb++;
469 }
470 }
471
472 /**
473 * init_alloc_map - initialise allocation map
474 * @host: host map to configure
475 *
476 * Initialise the allocation maps for this device. If the device
477 * is not quiescent the caller must hold the allocation lock
478 */
479
480 static void init_alloc_map(struct orc_host * host)
481 {
482 u8 i, j;
483
484 for (i = 0; i < MAX_CHANNELS; i++) {
485 for (j = 0; j < 8; j++) {
486 host->allocation_map[i][j] = 0xffffffff;
487 }
488 }
489 }
490
491 /**
492 * init_orchid - initialise the host adapter
493 * @host:host adapter to initialise
494 *
495 * Initialise the controller and if neccessary load the firmware.
496 *
497 * Returns -1 if the initialisation fails.
498 */
499
500 static int init_orchid(struct orc_host * host)
501 {
502 u8 *ptr;
503 u16 revision;
504 u8 i;
505
506 init_alloc_map(host);
507 outb(0xFF, host->base + ORC_GIMSK); /* Disable all interrupts */
508
509 if (inb(host->base + ORC_HSTUS) & RREADY) { /* Orchid is ready */
510 revision = orc_read_fwrev(host);
511 if (revision == 0xFFFF) {
512 outb(DEVRST, host->base + ORC_HCTRL); /* Reset Host Adapter */
513 if (wait_chip_ready(host) == 0)
514 return -1;
515 orc_load_firmware(host); /* Download FW */
516 setup_SCBs(host); /* Setup SCB base and SCB Size registers */
517 outb(0x00, host->base + ORC_HCTRL); /* clear HOSTSTOP */
518 if (wait_firmware_ready(host) == 0)
519 return -1;
520 /* Wait for firmware ready */
521 } else {
522 setup_SCBs(host); /* Setup SCB base and SCB Size registers */
523 }
524 } else { /* Orchid is not Ready */
525 outb(DEVRST, host->base + ORC_HCTRL); /* Reset Host Adapter */
526 if (wait_chip_ready(host) == 0)
527 return -1;
528 orc_load_firmware(host); /* Download FW */
529 setup_SCBs(host); /* Setup SCB base and SCB Size registers */
530 outb(HDO, host->base + ORC_HCTRL); /* Do Hardware Reset & */
531
532 /* clear HOSTSTOP */
533 if (wait_firmware_ready(host) == 0) /* Wait for firmware ready */
534 return -1;
535 }
536
537 /* Load an EEProm copy into RAM */
538 /* Assumes single threaded at this point */
539 read_eeprom(host);
540
541 if (nvramp->revision != 1)
542 return -1;
543
544 host->scsi_id = nvramp->scsi_id;
545 host->BIOScfg = nvramp->BIOSConfig1;
546 host->max_targets = MAX_TARGETS;
547 ptr = (u8 *) & (nvramp->Target00Config);
548 for (i = 0; i < 16; ptr++, i++) {
549 host->target_flag[i] = *ptr;
550 host->max_tags[i] = ORC_MAXTAGS;
551 }
552
553 if (nvramp->SCSI0Config & NCC_BUSRESET)
554 host->flags |= HCF_SCSI_RESET;
555 outb(0xFB, host->base + ORC_GIMSK); /* enable RP FIFO interrupt */
556 return 0;
557 }
558
559 /**
560 * orc_reset_scsi_bus - perform bus reset
561 * @host: host being reset
562 *
563 * Perform a full bus reset on the adapter.
564 */
565
566 static int orc_reset_scsi_bus(struct orc_host * host)
567 { /* I need Host Control Block Information */
568 unsigned long flags;
569
570 spin_lock_irqsave(&host->allocation_lock, flags);
571
572 init_alloc_map(host);
573 /* reset scsi bus */
574 outb(SCSIRST, host->base + ORC_HCTRL);
575 /* FIXME: We can spend up to a second with the lock held and
576 interrupts off here */
577 if (wait_scsi_reset_done(host) == 0) {
578 spin_unlock_irqrestore(&host->allocation_lock, flags);
579 return FAILED;
580 } else {
581 spin_unlock_irqrestore(&host->allocation_lock, flags);
582 return SUCCESS;
583 }
584 }
585
586 /**
587 * orc_device_reset - device reset handler
588 * @host: host to reset
589 * @cmd: command causing the reset
590 * @target; target device
591 *
592 * Reset registers, reset a hanging bus and kill active and disconnected
593 * commands for target w/o soft reset
594 */
595
596 static int orc_device_reset(struct orc_host * host, struct scsi_cmnd *cmd, unsigned int target)
597 { /* I need Host Control Block Information */
598 struct orc_scb *scb;
599 struct orc_extended_scb *escb;
600 struct orc_scb *host_scb;
601 u8 i;
602 unsigned long flags;
603
604 spin_lock_irqsave(&(host->allocation_lock), flags);
605 scb = (struct orc_scb *) NULL;
606 escb = (struct orc_extended_scb *) NULL;
607
608 /* setup scatter list address with one buffer */
609 host_scb = host->scb_virt;
610
611 /* FIXME: is this safe if we then fail to issue the reset or race
612 a completion ? */
613 init_alloc_map(host);
614
615 /* Find the scb corresponding to the command */
616 for (i = 0; i < ORC_MAXQUEUE; i++) {
617 escb = host_scb->escb;
618 if (host_scb->status && escb->srb == cmd)
619 break;
620 host_scb++;
621 }
622
623 if (i == ORC_MAXQUEUE) {
624 printk(KERN_ERR "Unable to Reset - No SCB Found\n");
625 spin_unlock_irqrestore(&(host->allocation_lock), flags);
626 return FAILED;
627 }
628
629 /* Allocate a new SCB for the reset command to the firmware */
630 if ((scb = __orc_alloc_scb(host)) == NULL) {
631 /* Can't happen.. */
632 spin_unlock_irqrestore(&(host->allocation_lock), flags);
633 return FAILED;
634 }
635
636 /* Reset device is handled by the firmware, we fill in an SCB and
637 fire it at the controller, it does the rest */
638 scb->opcode = ORC_BUSDEVRST;
639 scb->target = target;
640 scb->hastat = 0;
641 scb->tastat = 0;
642 scb->status = 0x0;
643 scb->link = 0xFF;
644 scb->reserved0 = 0;
645 scb->reserved1 = 0;
646 scb->xferlen = cpu_to_le32(0);
647 scb->sg_len = cpu_to_le32(0);
648
649 escb->srb = NULL;
650 escb->srb = cmd;
651 orc_exec_scb(host, scb); /* Start execute SCB */
652 spin_unlock_irqrestore(&host->allocation_lock, flags);
653 return SUCCESS;
654 }
655
656 /**
657 * __orc_alloc_scb - allocate an SCB
658 * @host: host to allocate from
659 *
660 * Allocate an SCB and return a pointer to the SCB object. NULL
661 * is returned if no SCB is free. The caller must already hold
662 * the allocator lock at this point.
663 */
664
665
666 static struct orc_scb *__orc_alloc_scb(struct orc_host * host)
667 {
668 u8 channel;
669 unsigned long idx;
670 u8 index;
671 u8 i;
672
673 channel = host->index;
674 for (i = 0; i < 8; i++) {
675 for (index = 0; index < 32; index++) {
676 if ((host->allocation_map[channel][i] >> index) & 0x01) {
677 host->allocation_map[channel][i] &= ~(1 << index);
678 idx = index + 32 * i;
679 /*
680 * Translate the index to a structure instance
681 */
682 return host->scb_virt + idx;
683 }
684 }
685 }
686 return NULL;
687 }
688
689 /**
690 * orc_alloc_scb - allocate an SCB
691 * @host: host to allocate from
692 *
693 * Allocate an SCB and return a pointer to the SCB object. NULL
694 * is returned if no SCB is free.
695 */
696
697 static struct orc_scb *orc_alloc_scb(struct orc_host * host)
698 {
699 struct orc_scb *scb;
700 unsigned long flags;
701
702 spin_lock_irqsave(&host->allocation_lock, flags);
703 scb = __orc_alloc_scb(host);
704 spin_unlock_irqrestore(&host->allocation_lock, flags);
705 return scb;
706 }
707
708 /**
709 * orc_release_scb - release an SCB
710 * @host: host owning the SCB
711 * @scb: SCB that is now free
712 *
713 * Called to return a completed SCB to the allocation pool. Before
714 * calling the SCB must be out of use on both the host and the HA.
715 */
716
717 static void orc_release_scb(struct orc_host *host, struct orc_scb *scb)
718 {
719 unsigned long flags;
720 u8 index, i, channel;
721
722 spin_lock_irqsave(&(host->allocation_lock), flags);
723 channel = host->index; /* Channel */
724 index = scb->scbidx;
725 i = index / 32;
726 index %= 32;
727 host->allocation_map[channel][i] |= (1 << index);
728 spin_unlock_irqrestore(&(host->allocation_lock), flags);
729 }
730
731 /**
732 * orchid_abort_scb - abort a command
733 *
734 * Abort a queued command that has been passed to the firmware layer
735 * if possible. This is all handled by the firmware. We aks the firmware
736 * and it either aborts the command or fails
737 */
738
739 static int orchid_abort_scb(struct orc_host * host, struct orc_scb * scb)
740 {
741 unsigned char data, status;
742
743 outb(ORC_CMD_ABORT_SCB, host->base + ORC_HDATA); /* Write command */
744 outb(HDO, host->base + ORC_HCTRL);
745 if (wait_HDO_off(host) == 0) /* Wait HDO off */
746 return 0;
747
748 outb(scb->scbidx, host->base + ORC_HDATA); /* Write address */
749 outb(HDO, host->base + ORC_HCTRL);
750 if (wait_HDO_off(host) == 0) /* Wait HDO off */
751 return 0;
752
753 if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
754 return 0;
755 status = inb(host->base + ORC_HDATA);
756 outb(data, host->base + ORC_HSTUS); /* Clear HDI */
757
758 if (status == 1) /* 0 - Successfully */
759 return 0; /* 1 - Fail */
760 return 1;
761 }
762
763 static int inia100_abort_cmd(struct orc_host * host, struct scsi_cmnd *cmd)
764 {
765 struct orc_extended_scb *escb;
766 struct orc_scb *scb;
767 u8 i;
768 unsigned long flags;
769
770 spin_lock_irqsave(&(host->allocation_lock), flags);
771
772 scb = host->scb_virt;
773
774 /* Walk the queue until we find the SCB that belongs to the command
775 block. This isn't a performance critical path so a walk in the park
776 here does no harm */
777
778 for (i = 0; i < ORC_MAXQUEUE; i++, scb++) {
779 escb = scb->escb;
780 if (scb->status && escb->srb == cmd) {
781 if (scb->tag_msg == 0) {
782 goto out;
783 } else {
784 /* Issue an ABORT to the firmware */
785 if (orchid_abort_scb(host, scb)) {
786 escb->srb = NULL;
787 spin_unlock_irqrestore(&host->allocation_lock, flags);
788 return SUCCESS;
789 } else
790 goto out;
791 }
792 }
793 }
794 out:
795 spin_unlock_irqrestore(&host->allocation_lock, flags);
796 return FAILED;
797 }
798
799 /**
800 * orc_interrupt - IRQ processing
801 * @host: Host causing the interrupt
802 *
803 * This function is called from the IRQ handler and protected
804 * by the host lock. While the controller reports that there are
805 * scb's for processing we pull them off the controller, turn the
806 * index into a host address pointer to the scb and call the scb
807 * handler.
808 *
809 * Returns IRQ_HANDLED if any SCBs were processed, IRQ_NONE otherwise
810 */
811
812 static irqreturn_t orc_interrupt(struct orc_host * host)
813 {
814 u8 scb_index;
815 struct orc_scb *scb;
816
817 /* Check if we have an SCB queued for servicing */
818 if (inb(host->base + ORC_RQUEUECNT) == 0)
819 return IRQ_NONE;
820
821 do {
822 /* Get the SCB index of the SCB to service */
823 scb_index = inb(host->base + ORC_RQUEUE);
824
825 /* Translate it back to a host pointer */
826 scb = (struct orc_scb *) ((unsigned long) host->scb_virt + (unsigned long) (sizeof(struct orc_scb) * scb_index));
827 scb->status = 0x0;
828 /* Process the SCB */
829 inia100_scb_handler(host, scb);
830 } while (inb(host->base + ORC_RQUEUECNT));
831 return IRQ_HANDLED;
832 } /* End of I1060Interrupt() */
833
834 /**
835 * inia100_build_scb - build SCB
836 * @host: host owing the control block
837 * @scb: control block to use
838 * @cmd: Mid layer command
839 *
840 * Build a host adapter control block from the SCSI mid layer command
841 */
842
843 static int inia100_build_scb(struct orc_host * host, struct orc_scb * scb, struct scsi_cmnd * cmd)
844 { /* Create corresponding SCB */
845 struct scatterlist *sg;
846 struct orc_sgent *sgent; /* Pointer to SG list */
847 int i, count_sg;
848 struct orc_extended_scb *escb;
849
850 /* Links between the escb, scb and Linux scsi midlayer cmd */
851 escb = scb->escb;
852 escb->srb = cmd;
853 sgent = NULL;
854
855 /* Set up the SCB to do a SCSI command block */
856 scb->opcode = ORC_EXECSCSI;
857 scb->flags = SCF_NO_DCHK; /* Clear done bit */
858 scb->target = cmd->device->id;
859 scb->lun = cmd->device->lun;
860 scb->reserved0 = 0;
861 scb->reserved1 = 0;
862 scb->sg_len = cpu_to_le32(0);
863
864 scb->xferlen = cpu_to_le32((u32) scsi_bufflen(cmd));
865 sgent = (struct orc_sgent *) & escb->sglist[0];
866
867 count_sg = scsi_dma_map(cmd);
868 if (count_sg < 0)
869 return count_sg;
870 BUG_ON(count_sg > TOTAL_SG_ENTRY);
871
872 /* Build the scatter gather lists */
873 if (count_sg) {
874 scb->sg_len = cpu_to_le32((u32) (count_sg * 8));
875 scsi_for_each_sg(cmd, sg, count_sg, i) {
876 sgent->base = cpu_to_le32((u32) sg_dma_address(sg));
877 sgent->length = cpu_to_le32((u32) sg_dma_len(sg));
878 sgent++;
879 }
880 } else {
881 scb->sg_len = cpu_to_le32(0);
882 sgent->base = cpu_to_le32(0);
883 sgent->length = cpu_to_le32(0);
884 }
885 scb->sg_addr = (u32) scb->sense_addr; /* sense_addr is already little endian */
886 scb->hastat = 0;
887 scb->tastat = 0;
888 scb->link = 0xFF;
889 scb->sense_len = SENSE_SIZE;
890 scb->cdb_len = cmd->cmd_len;
891 if (scb->cdb_len >= IMAX_CDB) {
892 printk("max cdb length= %x\b", cmd->cmd_len);
893 scb->cdb_len = IMAX_CDB;
894 }
895 scb->ident = cmd->device->lun | DISC_ALLOW;
896 if (cmd->device->tagged_supported) { /* Tag Support */
897 scb->tag_msg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
898 } else {
899 scb->tag_msg = 0; /* No tag support */
900 }
901 memcpy(scb->cdb, cmd->cmnd, scb->cdb_len);
902 return 0;
903 }
904
905 /**
906 * inia100_queue - queue command with host
907 * @cmd: Command block
908 * @done: Completion function
909 *
910 * Called by the mid layer to queue a command. Process the command
911 * block, build the host specific scb structures and if there is room
912 * queue the command down to the controller
913 */
914
915 static int inia100_queue(struct scsi_cmnd * cmd, void (*done) (struct scsi_cmnd *))
916 {
917 struct orc_scb *scb;
918 struct orc_host *host; /* Point to Host adapter control block */
919
920 host = (struct orc_host *) cmd->device->host->hostdata;
921 cmd->scsi_done = done;
922 /* Get free SCSI control block */
923 if ((scb = orc_alloc_scb(host)) == NULL)
924 return SCSI_MLQUEUE_HOST_BUSY;
925
926 if (inia100_build_scb(host, scb, cmd)) {
927 orc_release_scb(host, scb);
928 return SCSI_MLQUEUE_HOST_BUSY;
929 }
930 orc_exec_scb(host, scb); /* Start execute SCB */
931 return 0;
932 }
933
934 /*****************************************************************************
935 Function name : inia100_abort
936 Description : Abort a queued command.
937 (commands that are on the bus can't be aborted easily)
938 Input : host - Pointer to host adapter structure
939 Output : None.
940 Return : pSRB - Pointer to SCSI request block.
941 *****************************************************************************/
942 static int inia100_abort(struct scsi_cmnd * cmd)
943 {
944 struct orc_host *host;
945
946 host = (struct orc_host *) cmd->device->host->hostdata;
947 return inia100_abort_cmd(host, cmd);
948 }
949
950 /*****************************************************************************
951 Function name : inia100_reset
952 Description : Reset registers, reset a hanging bus and
953 kill active and disconnected commands for target w/o soft reset
954 Input : host - Pointer to host adapter structure
955 Output : None.
956 Return : pSRB - Pointer to SCSI request block.
957 *****************************************************************************/
958 static int inia100_bus_reset(struct scsi_cmnd * cmd)
959 { /* I need Host Control Block Information */
960 struct orc_host *host;
961 host = (struct orc_host *) cmd->device->host->hostdata;
962 return orc_reset_scsi_bus(host);
963 }
964
965 /*****************************************************************************
966 Function name : inia100_device_reset
967 Description : Reset the device
968 Input : host - Pointer to host adapter structure
969 Output : None.
970 Return : pSRB - Pointer to SCSI request block.
971 *****************************************************************************/
972 static int inia100_device_reset(struct scsi_cmnd * cmd)
973 { /* I need Host Control Block Information */
974 struct orc_host *host;
975 host = (struct orc_host *) cmd->device->host->hostdata;
976 return orc_device_reset(host, cmd, scmd_id(cmd));
977
978 }
979
980 /**
981 * inia100_scb_handler - interrupt callback
982 * @host: Host causing the interrupt
983 * @scb: SCB the controller returned as needing processing
984 *
985 * Perform completion processing on a control block. Do the conversions
986 * from host to SCSI midlayer error coding, save any sense data and
987 * the complete with the midlayer and recycle the scb.
988 */
989
990 static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb)
991 {
992 struct scsi_cmnd *cmd; /* Pointer to SCSI request block */
993 struct orc_extended_scb *escb;
994
995 escb = scb->escb;
996 if ((cmd = (struct scsi_cmnd *) escb->srb) == NULL) {
997 printk(KERN_ERR "inia100_scb_handler: SRB pointer is empty\n");
998 orc_release_scb(host, scb); /* Release SCB for current channel */
999 return;
1000 }
1001 escb->srb = NULL;
1002
1003 switch (scb->hastat) {
1004 case 0x0:
1005 case 0xa: /* Linked command complete without error and linked normally */
1006 case 0xb: /* Linked command complete without error interrupt generated */
1007 scb->hastat = 0;
1008 break;
1009
1010 case 0x11: /* Selection time out-The initiator selection or target
1011 reselection was not complete within the SCSI Time out period */
1012 scb->hastat = DID_TIME_OUT;
1013 break;
1014
1015 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
1016 phase sequence was requested by the target. The host adapter
1017 will generate a SCSI Reset Condition, notifying the host with
1018 a SCRD interrupt */
1019 scb->hastat = DID_RESET;
1020 break;
1021
1022 case 0x1a: /* SCB Aborted. 07/21/98 */
1023 scb->hastat = DID_ABORT;
1024 break;
1025
1026 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
1027 than was allocated by the Data Length field or the sum of the
1028 Scatter / Gather Data Length fields. */
1029 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
1030 case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid. */
1031
1032 default:
1033 printk(KERN_DEBUG "inia100: %x %x\n", scb->hastat, scb->tastat);
1034 scb->hastat = DID_ERROR; /* Couldn't find any better */
1035 break;
1036 }
1037
1038 if (scb->tastat == 2) { /* Check condition */
1039 memcpy((unsigned char *) &cmd->sense_buffer[0],
1040 (unsigned char *) &escb->sglist[0], SENSE_SIZE);
1041 }
1042 cmd->result = scb->tastat | (scb->hastat << 16);
1043 scsi_dma_unmap(cmd);
1044 cmd->scsi_done(cmd); /* Notify system DONE */
1045 orc_release_scb(host, scb); /* Release SCB for current channel */
1046 }
1047
1048 /**
1049 * inia100_intr - interrupt handler
1050 * @irqno: Interrupt value
1051 * @devid: Host adapter
1052 *
1053 * Entry point for IRQ handling. All the real work is performed
1054 * by orc_interrupt.
1055 */
1056 static irqreturn_t inia100_intr(int irqno, void *devid)
1057 {
1058 struct Scsi_Host *shost = (struct Scsi_Host *)devid;
1059 struct orc_host *host = (struct orc_host *)shost->hostdata;
1060 unsigned long flags;
1061 irqreturn_t res;
1062
1063 spin_lock_irqsave(shost->host_lock, flags);
1064 res = orc_interrupt(host);
1065 spin_unlock_irqrestore(shost->host_lock, flags);
1066
1067 return res;
1068 }
1069
1070 static struct scsi_host_template inia100_template = {
1071 .proc_name = "inia100",
1072 .name = inia100_REVID,
1073 .queuecommand = inia100_queue,
1074 .eh_abort_handler = inia100_abort,
1075 .eh_bus_reset_handler = inia100_bus_reset,
1076 .eh_device_reset_handler = inia100_device_reset,
1077 .can_queue = 1,
1078 .this_id = 1,
1079 .sg_tablesize = SG_ALL,
1080 .cmd_per_lun = 1,
1081 .use_clustering = ENABLE_CLUSTERING,
1082 };
1083
1084 static int __devinit inia100_probe_one(struct pci_dev *pdev,
1085 const struct pci_device_id *id)
1086 {
1087 struct Scsi_Host *shost;
1088 struct orc_host *host;
1089 unsigned long port, bios;
1090 int error = -ENODEV;
1091 u32 sz;
1092 unsigned long biosaddr;
1093 char *bios_phys;
1094
1095 if (pci_enable_device(pdev))
1096 goto out;
1097 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1098 printk(KERN_WARNING "Unable to set 32bit DMA "
1099 "on inia100 adapter, ignoring.\n");
1100 goto out_disable_device;
1101 }
1102
1103 pci_set_master(pdev);
1104
1105 port = pci_resource_start(pdev, 0);
1106 if (!request_region(port, 256, "inia100")) {
1107 printk(KERN_WARNING "inia100: io port 0x%lx, is busy.\n", port);
1108 goto out_disable_device;
1109 }
1110
1111 /* <02> read from base address + 0x50 offset to get the bios value. */
1112 bios = inw(port + 0x50);
1113
1114
1115 shost = scsi_host_alloc(&inia100_template, sizeof(struct orc_host));
1116 if (!shost)
1117 goto out_release_region;
1118
1119 host = (struct orc_host *)shost->hostdata;
1120 host->pdev = pdev;
1121 host->base = port;
1122 host->BIOScfg = bios;
1123 spin_lock_init(&host->allocation_lock);
1124
1125 /* Get total memory needed for SCB */
1126 sz = ORC_MAXQUEUE * sizeof(struct orc_scb);
1127 host->scb_virt = pci_alloc_consistent(pdev, sz,
1128 &host->scb_phys);
1129 if (!host->scb_virt) {
1130 printk("inia100: SCB memory allocation error\n");
1131 goto out_host_put;
1132 }
1133 memset(host->scb_virt, 0, sz);
1134
1135 /* Get total memory needed for ESCB */
1136 sz = ORC_MAXQUEUE * sizeof(struct orc_extended_scb);
1137 host->escb_virt = pci_alloc_consistent(pdev, sz,
1138 &host->escb_phys);
1139 if (!host->escb_virt) {
1140 printk("inia100: ESCB memory allocation error\n");
1141 goto out_free_scb_array;
1142 }
1143 memset(host->escb_virt, 0, sz);
1144
1145 biosaddr = host->BIOScfg;
1146 biosaddr = (biosaddr << 4);
1147 bios_phys = phys_to_virt(biosaddr);
1148 if (init_orchid(host)) { /* Initialize orchid chip */
1149 printk("inia100: initial orchid fail!!\n");
1150 goto out_free_escb_array;
1151 }
1152
1153 shost->io_port = host->base;
1154 shost->n_io_port = 0xff;
1155 shost->can_queue = ORC_MAXQUEUE;
1156 shost->unique_id = shost->io_port;
1157 shost->max_id = host->max_targets;
1158 shost->max_lun = 16;
1159 shost->irq = pdev->irq;
1160 shost->this_id = host->scsi_id; /* Assign HCS index */
1161 shost->sg_tablesize = TOTAL_SG_ENTRY;
1162
1163 /* Initial orc chip */
1164 error = request_irq(pdev->irq, inia100_intr, IRQF_SHARED,
1165 "inia100", shost);
1166 if (error < 0) {
1167 printk(KERN_WARNING "inia100: unable to get irq %d\n",
1168 pdev->irq);
1169 goto out_free_escb_array;
1170 }
1171
1172 pci_set_drvdata(pdev, shost);
1173
1174 error = scsi_add_host(shost, &pdev->dev);
1175 if (error)
1176 goto out_free_irq;
1177
1178 scsi_scan_host(shost);
1179 return 0;
1180
1181 out_free_irq:
1182 free_irq(shost->irq, shost);
1183 out_free_escb_array:
1184 pci_free_consistent(pdev, ORC_MAXQUEUE * sizeof(struct orc_extended_scb),
1185 host->escb_virt, host->escb_phys);
1186 out_free_scb_array:
1187 pci_free_consistent(pdev, ORC_MAXQUEUE * sizeof(struct orc_scb),
1188 host->scb_virt, host->scb_phys);
1189 out_host_put:
1190 scsi_host_put(shost);
1191 out_release_region:
1192 release_region(port, 256);
1193 out_disable_device:
1194 pci_disable_device(pdev);
1195 out:
1196 return error;
1197 }
1198
1199 static void __devexit inia100_remove_one(struct pci_dev *pdev)
1200 {
1201 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1202 struct orc_host *host = (struct orc_host *)shost->hostdata;
1203
1204 scsi_remove_host(shost);
1205
1206 free_irq(shost->irq, shost);
1207 pci_free_consistent(pdev, ORC_MAXQUEUE * sizeof(struct orc_extended_scb),
1208 host->escb_virt, host->escb_phys);
1209 pci_free_consistent(pdev, ORC_MAXQUEUE * sizeof(struct orc_scb),
1210 host->scb_virt, host->scb_phys);
1211 release_region(shost->io_port, 256);
1212
1213 scsi_host_put(shost);
1214 }
1215
1216 static struct pci_device_id inia100_pci_tbl[] = {
1217 {PCI_VENDOR_ID_INIT, 0x1060, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
1218 {0,}
1219 };
1220 MODULE_DEVICE_TABLE(pci, inia100_pci_tbl);
1221
1222 static struct pci_driver inia100_pci_driver = {
1223 .name = "inia100",
1224 .id_table = inia100_pci_tbl,
1225 .probe = inia100_probe_one,
1226 .remove = __devexit_p(inia100_remove_one),
1227 };
1228
1229 static int __init inia100_init(void)
1230 {
1231 return pci_register_driver(&inia100_pci_driver);
1232 }
1233
1234 static void __exit inia100_exit(void)
1235 {
1236 pci_unregister_driver(&inia100_pci_driver);
1237 }
1238
1239 MODULE_DESCRIPTION("Initio A100U2W SCSI driver");
1240 MODULE_AUTHOR("Initio Corporation");
1241 MODULE_LICENSE("Dual BSD/GPL");
1242
1243 module_init(inia100_init);
1244 module_exit(inia100_exit);
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