2 * ultrastor.c Copyright (C) 1992 David B. Gentzel
3 * Low-level SCSI driver for UltraStor 14F, 24F, and 34F
4 * by David B. Gentzel, Whitfield Software Services, Carnegie, PA
5 * (gentzel@nova.enet.dec.com)
6 * scatter/gather added by Scott Taylor (n217cg@tamuts.tamu.edu)
7 * 24F and multiple command support by John F. Carr (jfc@athena.mit.edu)
8 * John's work modified by Caleb Epstein (cae@jpmorgan.com) and
9 * Eric Youngdale (ericy@cais.com).
10 * Thanks to UltraStor for providing the necessary documentation
12 * This is an old driver, for the 14F and 34F you should be using the
13 * u14-34f driver instead.
18 * 1. Find out why scatter/gather is limited to 16 requests per command.
19 * This is fixed, at least on the 24F, as of version 1.12 - CAE.
20 * 2. Look at command linking (mscp.command_link and
21 * mscp.command_link_id). (Does not work with many disks,
22 * and no performance increase. ERY).
23 * 3. Allow multiple adapters.
28 * The UltraStor 14F, 24F, and 34F are a family of intelligent, high
29 * performance SCSI-2 host adapters. They all support command queueing
30 * and scatter/gather I/O. Some of them can also emulate the standard
31 * WD1003 interface for use with OS's which don't support SCSI. Here
32 * is the scoop on the various models:
33 * 14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
34 * 14N - ISA HA with floppy support. I think that this is a non-DMA
35 * HA. Nothing further known.
36 * 24F - EISA Bus Master HA with floppy support and WD1003 emulation.
37 * 34F - VL-Bus Bus Master HA with floppy support (no WD1003 emulation).
39 * The 14F, 24F, and 34F are supported by this driver.
41 * Places flagged with a triple question-mark are things which are either
42 * unfinished, questionable, or wrong.
45 /* Changes from version 1.11 alpha to 1.12
47 * Increased the size of the scatter-gather list to 33 entries for
48 * the 24F adapter (it was 16). I don't have the specs for the 14F
49 * or the 34F, so they may support larger s-g lists as well.
51 * Caleb Epstein <cae@jpmorgan.com>
54 /* Changes from version 1.9 to 1.11
56 * Patches to bring this driver up to speed with the default kernel
57 * driver which supports only the 14F and 34F adapters. This version
58 * should compile cleanly into 0.99.13, 0.99.12 and probably 0.99.11.
60 * Fixes from Eric Youngdale to fix a few possible race conditions and
61 * several problems with bit testing operations (insufficient
64 * Removed the ultrastor_abort() and ultrastor_reset() functions
65 * (enclosed them in #if 0 / #endif). These functions, at least on
66 * the 24F, cause the SCSI bus to do odd things and generally lead to
67 * kernel panics and machine hangs. This is like the Adaptec code.
69 * Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts.
72 /* Changes from version 1.8 to version 1.9
74 * 0.99.11 patches (cae@jpmorgan.com) */
76 /* Changes from version 1.7 to version 1.8
78 * Better error reporting.
81 /* Changes from version 1.6 to version 1.7
83 * Removed CSIR command code.
85 * Better race condition avoidance (xchgb function added).
87 * Set ICM and OGM status to zero at probe (24F)
89 * reset sends soft reset to UltraStor adapter
91 * reset adapter if adapter interrupts with an invalid MSCP address
93 * handle aborted command interrupt (24F)
97 /* Changes from version 1.5 to version 1.6:
99 * Read MSCP address from ICM _before_ clearing the interrupt flag.
100 * This fixes a race condition.
103 /* Changes from version 1.4 to version 1.5:
105 * Abort now calls done when multiple commands are enabled.
107 * Clear busy when aborted command finishes, not when abort is called.
109 * More debugging messages for aborts.
112 /* Changes from version 1.3 to version 1.4:
114 * Enable automatic request of sense data on error (requires newer version
115 * of scsi.c to be useful).
117 * Fix PORT_OVERRIDE for 14F.
119 * Fix abort and reset to work properly (config.aborted wasn't cleared
120 * after it was tested, so after a command abort no further commands would
123 * Boot time test to enable SCSI bus reset (defaults to not allowing reset).
125 * Fix test for OGM busy -- the busy bit is in different places on the 24F.
127 * Release ICM slot by clearing first byte on 24F.
130 #include <linux/module.h>
131 #include <linux/blkdev.h>
132 #include <linux/interrupt.h>
133 #include <linux/stddef.h>
134 #include <linux/string.h>
135 #include <linux/kernel.h>
136 #include <linux/ioport.h>
137 #include <linux/proc_fs.h>
138 #include <linux/spinlock.h>
139 #include <linux/stat.h>
140 #include <linux/bitops.h>
141 #include <linux/delay.h>
146 #define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */
148 #include <scsi/scsi_host.h>
149 #include "ultrastor.h"
154 #ifndef ULTRASTOR_DEBUG
155 #define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET)
158 #define VERSION "1.12"
160 #define PACKED __attribute__((packed))
161 #define ALIGNED(x) __attribute__((aligned(x)))
164 /* The 14F uses an array of 4-byte ints for its scatter/gather list.
165 The data can be unaligned, but need not be. It's easier to give
166 the list normal alignment since it doesn't need to fit into a
175 /* MailBox SCSI Command Packet. Basic command structure for communicating
178 unsigned char opcode: 3; /* type of command */
179 unsigned char xdir: 2; /* data transfer direction */
180 unsigned char dcn: 1; /* disable disconnect */
181 unsigned char ca: 1; /* use cache (if available) */
182 unsigned char sg: 1; /* scatter/gather operation */
183 unsigned char target_id: 3; /* target SCSI id */
184 unsigned char ch_no: 2; /* SCSI channel (always 0 for 14f) */
185 unsigned char lun: 3; /* logical unit number */
186 unsigned int transfer_data PACKED; /* transfer data pointer */
187 unsigned int transfer_data_length PACKED; /* length in bytes */
188 unsigned int command_link PACKED; /* for linking command chains */
189 unsigned char scsi_command_link_id; /* identifies command in chain */
190 unsigned char number_of_sg_list; /* (if sg is set) 8 bytes per list */
191 unsigned char length_of_sense_byte;
192 unsigned char length_of_scsi_cdbs; /* 6, 10, or 12 */
193 unsigned char scsi_cdbs[12]; /* SCSI commands */
194 unsigned char adapter_status; /* non-zero indicates HA error */
195 unsigned char target_status; /* non-zero indicates target error */
196 u32 sense_data PACKED;
197 /* The following fields are for software only. They are included in
198 the MSCP structure because they are associated with SCSI requests. */
199 void (*done) (struct scsi_cmnd *);
200 struct scsi_cmnd *SCint;
201 ultrastor_sg_list sglist[ULTRASTOR_24F_MAX_SG]; /* use larger size for 24F */
205 /* Port addresses (relative to the base address) */
206 #define U14F_PRODUCT_ID(port) ((port) + 0x4)
207 #define CONFIG(port) ((port) + 0x6)
209 /* Port addresses relative to the doorbell base address. */
210 #define LCL_DOORBELL_MASK(port) ((port) + 0x0)
211 #define LCL_DOORBELL_INTR(port) ((port) + 0x1)
212 #define SYS_DOORBELL_MASK(port) ((port) + 0x2)
213 #define SYS_DOORBELL_INTR(port) ((port) + 0x3)
216 /* Used to store configuration info read from config i/o registers. Most of
217 this is not used yet, but might as well save it.
219 This structure also holds port addresses that are not at the same offset
222 This structure holds all data that must be duplicated to support multiple
225 static struct ultrastor_config
227 unsigned short port_address; /* base address of card */
228 unsigned short doorbell_address; /* base address of doorbell CSRs */
229 unsigned short ogm_address; /* base address of OGM */
230 unsigned short icm_address; /* base address of ICM */
231 const void *bios_segment;
232 unsigned char interrupt: 4;
233 unsigned char dma_channel: 3;
234 unsigned char bios_drive_number: 1;
236 unsigned char sectors;
237 unsigned char ha_scsi_id: 3;
238 unsigned char subversion: 4;
239 unsigned char revision;
240 /* The slot number is used to distinguish the 24F (slot != 0) from
241 the 14F and 34F (slot == 0). */
244 #ifdef PRINT_U24F_VERSION
245 volatile int csir_done;
248 /* A pool of MSCP structures for this adapter, and a bitmask of
249 busy structures. (If ULTRASTOR_14F_MAX_CMDS == 1, a 1 byte
250 busy flag is used instead.) */
252 #if ULTRASTOR_MAX_CMDS == 1
253 unsigned char mscp_busy;
255 unsigned long mscp_free;
257 volatile unsigned char aborted[ULTRASTOR_MAX_CMDS];
258 struct mscp mscp[ULTRASTOR_MAX_CMDS];
261 /* Set this to 1 to reset the SCSI bus on error. */
262 static int ultrastor_bus_reset;
265 /* Allowed BIOS base addresses (NULL indicates reserved) */
266 static const void *const bios_segment_table[8] = {
267 NULL, (void *)0xC4000, (void *)0xC8000, (void *)0xCC000,
268 (void *)0xD0000, (void *)0xD4000, (void *)0xD8000, (void *)0xDC000,
271 /* Allowed IRQs for 14f */
272 static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 };
274 /* Allowed DMA channels for 14f (0 indicates reserved) */
275 static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 };
277 /* Head/sector mappings allowed by 14f */
278 static const struct {
280 unsigned char sectors;
281 } mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } };
283 #ifndef PORT_OVERRIDE
284 /* ??? A probe of address 0x310 screws up NE2000 cards */
285 static const unsigned short ultrastor_ports_14f[] = {
286 0x330, 0x340, /*0x310,*/ 0x230, 0x240, 0x210, 0x130, 0x140,
290 static void ultrastor_interrupt(void *);
291 static irqreturn_t do_ultrastor_interrupt(int, void *);
292 static inline void build_sg_list(struct mscp *, struct scsi_cmnd *SCpnt);
295 /* Always called with host lock held */
297 static inline int find_and_clear_bit_16(unsigned long *field)
302 panic("No free mscp");
309 : "=&r" (rv), "+m" (*field) :);
314 /* This has been re-implemented with the help of Richard Earnshaw,
315 <rwe@pegasus.esprit.ec.org> and works with gcc-2.5.8 and gcc-2.6.0.
316 The instability noted by jfc below appears to be a bug in
317 gcc-2.5.x when compiling w/o optimization. --Caleb
319 This asm is fragile: it doesn't work without the casts and it may
320 not work without optimization. Maybe I should add a swap builtin
322 static inline unsigned char xchgb(unsigned char reg,
323 volatile unsigned char *mem)
325 __asm__ ("xchgb %0,%1" : "=q" (reg), "=m" (*mem) : "0" (reg));
329 #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
331 /* Always called with the host lock held */
332 static void log_ultrastor_abort(struct ultrastor_config *config,
335 static char fmt[80] = "abort %d (%x); MSCP free pool: %x;";
338 for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
341 if (! (config->mscp_free & (1 << i)))
342 fmt[21 + i*2] = '0' + config->mscp[i].target_id;
346 fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n';
347 fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0;
348 printk(fmt, command, &config->mscp[command], config->mscp_free);
353 static int ultrastor_14f_detect(struct scsi_host_template * tpnt)
356 unsigned char in_byte, version_byte = 0;
358 unsigned char bios_segment: 3;
359 unsigned char removable_disks_as_fixed: 1;
360 unsigned char interrupt: 2;
361 unsigned char dma_channel: 2;
364 unsigned char ha_scsi_id: 3;
365 unsigned char mapping_mode: 2;
366 unsigned char bios_drive_number: 1;
367 unsigned char tfr_port: 2;
370 #if (ULTRASTOR_DEBUG & UD_DETECT)
371 printk("US14F: detect: called\n");
374 /* If a 24F has already been configured, don't look for a 14F. */
375 if (config.bios_segment)
379 if(!request_region(PORT_OVERRIDE, 0xc, "ultrastor")) {
380 printk("Ultrastor I/O space already in use\n");
383 config.port_address = PORT_OVERRIDE;
385 for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) {
386 if(!request_region(ultrastor_ports_14f[i], 0x0c, "ultrastor")) continue;
387 config.port_address = ultrastor_ports_14f[i];
390 #if (ULTRASTOR_DEBUG & UD_DETECT)
391 printk("US14F: detect: testing port address %03X\n", config.port_address);
394 in_byte = inb(U14F_PRODUCT_ID(config.port_address));
395 if (in_byte != US14F_PRODUCT_ID_0) {
396 #if (ULTRASTOR_DEBUG & UD_DETECT)
397 # ifdef PORT_OVERRIDE
398 printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte);
400 printk("US14F: detect: no adapter at port %03X\n", config.port_address);
404 goto out_release_port;
406 release_region(config.port_address, 0x0c);
410 in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1);
411 /* Only upper nibble is significant for Product ID 1 */
412 if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) {
413 #if (ULTRASTOR_DEBUG & UD_DETECT)
414 # ifdef PORT_OVERRIDE
415 printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte);
417 printk("US14F: detect: no adapter at port %03X\n", config.port_address);
421 goto out_release_port;
423 release_region(config.port_address, 0x0c);
427 version_byte = in_byte;
428 #ifndef PORT_OVERRIDE
431 if (i == ARRAY_SIZE(ultrastor_ports_14f)) {
432 # if (ULTRASTOR_DEBUG & UD_DETECT)
433 printk("US14F: detect: no port address found!\n");
435 /* all ports probed already released - we can just go straight out */
440 #if (ULTRASTOR_DEBUG & UD_DETECT)
441 printk("US14F: detect: adapter found at port address %03X\n",
442 config.port_address);
445 /* Set local doorbell mask to disallow bus reset unless
446 ultrastor_bus_reset is true. */
447 outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address));
449 /* All above tests passed, must be the right thing. Get some useful
452 /* Register the I/O space that we use */
454 *(char *)&config_1 = inb(CONFIG(config.port_address + 0));
455 *(char *)&config_2 = inb(CONFIG(config.port_address + 1));
456 config.bios_segment = bios_segment_table[config_1.bios_segment];
457 config.doorbell_address = config.port_address;
458 config.ogm_address = config.port_address + 0x8;
459 config.icm_address = config.port_address + 0xC;
460 config.interrupt = interrupt_table_14f[config_1.interrupt];
461 config.ha_scsi_id = config_2.ha_scsi_id;
462 config.heads = mapping_table[config_2.mapping_mode].heads;
463 config.sectors = mapping_table[config_2.mapping_mode].sectors;
464 config.bios_drive_number = config_2.bios_drive_number;
465 config.subversion = (version_byte & 0x0F);
466 if (config.subversion == U34F)
467 config.dma_channel = 0;
469 config.dma_channel = dma_channel_table_14f[config_1.dma_channel];
471 if (!config.bios_segment) {
472 #if (ULTRASTOR_DEBUG & UD_DETECT)
473 printk("US14F: detect: not detected.\n");
475 goto out_release_port;
478 /* Final consistency check, verify previous info. */
479 if (config.subversion != U34F)
480 if (!config.dma_channel || !(config_2.tfr_port & 0x2)) {
481 #if (ULTRASTOR_DEBUG & UD_DETECT)
482 printk("US14F: detect: consistency check failed\n");
484 goto out_release_port;
487 /* If we were TRULY paranoid, we could issue a host adapter inquiry
488 command here and verify the data returned. But frankly, I'm
491 /* Finally! Now I'm satisfied... */
492 #if (ULTRASTOR_DEBUG & UD_DETECT)
493 printk("US14F: detect: detect succeeded\n"
494 " Port address: %03X\n"
495 " BIOS segment: %05X\n"
500 config.port_address, config.bios_segment, config.interrupt,
501 config.dma_channel, config.ha_scsi_id, config.subversion);
503 tpnt->this_id = config.ha_scsi_id;
504 tpnt->unchecked_isa_dma = (config.subversion != U34F);
506 #if ULTRASTOR_MAX_CMDS > 1
507 config.mscp_free = ~0;
511 * Brrr, &config.mscp[0].SCint->host) it is something magical....
514 if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", &config.mscp[0].SCint->device->host)) {
515 printk("Unable to allocate IRQ%u for UltraStor controller.\n",
517 goto out_release_port;
519 if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) {
520 printk("Unable to allocate DMA channel %u for UltraStor controller.\n",
522 free_irq(config.interrupt, NULL);
523 goto out_release_port;
525 tpnt->sg_tablesize = ULTRASTOR_14F_MAX_SG;
526 printk("UltraStor driver version" VERSION ". Using %d SG lists.\n",
527 ULTRASTOR_14F_MAX_SG);
531 release_region(config.port_address, 0x0c);
535 static int ultrastor_24f_detect(struct scsi_host_template * tpnt)
538 struct Scsi_Host * shpnt = NULL;
540 #if (ULTRASTOR_DEBUG & UD_DETECT)
541 printk("US24F: detect");
544 /* probe each EISA slot at slot address C80 */
545 for (i = 1; i < 15; i++)
547 unsigned char config_1, config_2;
548 unsigned short addr = (i << 12) | ULTRASTOR_24F_PORT;
550 if (inb(addr) != US24F_PRODUCT_ID_0 &&
551 inb(addr+1) != US24F_PRODUCT_ID_1 &&
552 inb(addr+2) != US24F_PRODUCT_ID_2)
555 config.revision = inb(addr+3);
557 if (! (inb(addr+4) & 1))
559 #if (ULTRASTOR_DEBUG & UD_DETECT)
560 printk("U24F: found disabled card in slot %u\n", i);
564 #if (ULTRASTOR_DEBUG & UD_DETECT)
565 printk("U24F: found card in slot %u\n", i);
567 config_1 = inb(addr + 5);
568 config.bios_segment = bios_segment_table[config_1 & 7];
569 switch(config_1 >> 4)
572 config.interrupt = 15;
575 config.interrupt = 14;
578 config.interrupt = 11;
581 config.interrupt = 10;
584 printk("U24F: invalid IRQ\n");
590 config.port_address = addr;
591 config.doorbell_address = addr + 12;
592 config.ogm_address = addr + 0x17;
593 config.icm_address = addr + 0x1C;
594 config_2 = inb(addr + 7);
595 config.ha_scsi_id = config_2 & 7;
596 config.heads = mapping_table[(config_2 >> 3) & 3].heads;
597 config.sectors = mapping_table[(config_2 >> 3) & 3].sectors;
598 #if (ULTRASTOR_DEBUG & UD_DETECT)
599 printk("US24F: detect: detect succeeded\n"
600 " Port address: %03X\n"
601 " BIOS segment: %05X\n"
603 " H/A SCSI ID: %u\n",
604 config.port_address, config.bios_segment,
605 config.interrupt, config.ha_scsi_id);
607 tpnt->this_id = config.ha_scsi_id;
608 tpnt->unchecked_isa_dma = 0;
609 tpnt->sg_tablesize = ULTRASTOR_24F_MAX_SG;
611 shpnt = scsi_register(tpnt, 0);
613 printk(KERN_WARNING "(ultrastor:) Could not register scsi device. Aborting registration.\n");
614 free_irq(config.interrupt, do_ultrastor_interrupt);
618 if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", shpnt))
620 printk("Unable to allocate IRQ%u for UltraStor controller.\n",
625 shpnt->irq = config.interrupt;
626 shpnt->dma_channel = config.dma_channel;
627 shpnt->io_port = config.port_address;
629 #if ULTRASTOR_MAX_CMDS > 1
630 config.mscp_free = ~0;
632 /* Mark ICM and OGM free */
633 outb(0, addr + 0x16);
634 outb(0, addr + 0x1B);
636 /* Set local doorbell mask to disallow bus reset unless
637 ultrastor_bus_reset is true. */
638 outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12));
639 outb(0x02, SYS_DOORBELL_MASK(addr+12));
640 printk("UltraStor driver version " VERSION ". Using %d SG lists.\n",
647 static int ultrastor_detect(struct scsi_host_template * tpnt)
649 tpnt->proc_name = "ultrastor";
650 return ultrastor_14f_detect(tpnt) || ultrastor_24f_detect(tpnt);
653 static int ultrastor_release(struct Scsi_Host *shost)
656 free_irq(shost->irq, NULL);
657 if (shost->dma_channel != 0xff)
658 free_dma(shost->dma_channel);
659 if (shost->io_port && shost->n_io_port)
660 release_region(shost->io_port, shost->n_io_port);
661 scsi_unregister(shost);
665 static const char *ultrastor_info(struct Scsi_Host * shpnt)
670 sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u",
671 config.slot, config.interrupt);
672 else if (config.subversion)
673 sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u",
674 config.port_address, (int)config.bios_segment,
677 sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u",
678 config.port_address, (int)config.bios_segment,
679 config.interrupt, config.dma_channel);
683 static inline void build_sg_list(struct mscp *mscp, struct scsi_cmnd *SCpnt)
685 struct scatterlist *sg;
686 long transfer_length = 0;
689 max = scsi_sg_count(SCpnt);
690 scsi_for_each_sg(SCpnt, sg, max, i) {
691 mscp->sglist[i].address = isa_page_to_bus(sg_page(sg)) + sg->offset;
692 mscp->sglist[i].num_bytes = sg->length;
693 transfer_length += sg->length;
695 mscp->number_of_sg_list = max;
696 mscp->transfer_data = isa_virt_to_bus(mscp->sglist);
697 /* ??? May not be necessary. Docs are unclear as to whether transfer
698 length field is ignored or whether it should be set to the total
699 number of bytes of the transfer. */
700 mscp->transfer_data_length = transfer_length;
703 static int ultrastor_queuecommand_lck(struct scsi_cmnd *SCpnt,
704 void (*done) (struct scsi_cmnd *))
706 struct mscp *my_mscp;
707 #if ULTRASTOR_MAX_CMDS > 1
712 /* Next test is for debugging; "can't happen" */
713 if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0)
714 panic("ultrastor_queuecommand: no free MSCP\n");
715 mscp_index = find_and_clear_bit_16(&config.mscp_free);
717 /* Has the command been aborted? */
718 if (xchgb(0xff, &config.aborted[mscp_index]) != 0)
720 status = DID_ABORT << 16;
724 my_mscp = &config.mscp[mscp_index];
726 *(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3);
728 /* Tape drives don't work properly if the cache is used. The SCSI
729 READ command for a tape doesn't have a block offset, and the adapter
730 incorrectly assumes that all reads from the tape read the same
731 blocks. Results will depend on read buffer size and other disk
734 ??? Which other device types should never use the cache? */
735 my_mscp->ca = SCpnt->device->type != TYPE_TAPE;
736 my_mscp->target_id = SCpnt->device->id;
738 my_mscp->lun = SCpnt->device->lun;
739 if (scsi_sg_count(SCpnt)) {
740 /* Set scatter/gather flag in SCSI command packet */
742 build_sg_list(my_mscp, SCpnt);
744 /* Unset scatter/gather flag in SCSI command packet */
746 my_mscp->transfer_data = isa_virt_to_bus(scsi_sglist(SCpnt));
747 my_mscp->transfer_data_length = scsi_bufflen(SCpnt);
749 my_mscp->command_link = 0; /*???*/
750 my_mscp->scsi_command_link_id = 0; /*???*/
751 my_mscp->length_of_sense_byte = SCSI_SENSE_BUFFERSIZE;
752 my_mscp->length_of_scsi_cdbs = SCpnt->cmd_len;
753 memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs);
754 my_mscp->adapter_status = 0;
755 my_mscp->target_status = 0;
756 my_mscp->sense_data = isa_virt_to_bus(&SCpnt->sense_buffer);
757 my_mscp->done = done;
758 my_mscp->SCint = SCpnt;
759 SCpnt->host_scribble = (unsigned char *)my_mscp;
761 /* Find free OGM slot. On 24F, look for OGM status byte == 0.
762 On 14F and 34F, wait for local interrupt pending flag to clear.
764 FIXME: now we are using new_eh we should punt here and let the
765 midlayer sort it out */
769 while (inb(config.ogm_address - 1) != 0 && config.aborted[mscp_index] == 0xff)
774 while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) && config.aborted[mscp_index] == 0xff)
777 /* To avoid race conditions, keep the code to write to the adapter
778 atomic. This simplifies the abort code. Right now the
779 scsi mid layer has the host_lock already held
782 if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1))
785 status = xchgb(0, &config.aborted[mscp_index]);
786 if (status != 0xff) {
788 #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
789 printk("USx4F: queuecommand: aborted\n");
790 #if ULTRASTOR_MAX_CMDS > 1
791 log_ultrastor_abort(&config, mscp_index);
797 set_bit(mscp_index, &config.mscp_free);
798 /* If the driver queues commands, call the done proc here. Otherwise
800 #if ULTRASTOR_MAX_CMDS > 1
801 SCpnt->result = status;
809 /* Store pointer in OGM address bytes */
810 outl(isa_virt_to_bus(my_mscp), config.ogm_address);
812 /* Issue OGM interrupt */
814 /* Write OGM command register on 24F */
815 outb(1, config.ogm_address - 1);
816 outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
818 outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address));
821 #if (ULTRASTOR_DEBUG & UD_COMMAND)
822 printk("USx4F: queuecommand: returning\n");
828 static DEF_SCSI_QCMD(ultrastor_queuecommand)
830 /* This code must deal with 2 cases:
832 1. The command has not been written to the OGM. In this case, set
833 the abort flag and return.
835 2. The command has been written to the OGM and is stuck somewhere in
838 2a. On a 24F, ask the adapter to abort the command. It will interrupt
841 2b. Call the command's done procedure.
845 static int ultrastor_abort(struct scsi_cmnd *SCpnt)
847 #if ULTRASTOR_DEBUG & UD_ABORT
849 unsigned char icm_status = 0, ogm_status = 0;
850 unsigned int icm_addr = 0, ogm_addr = 0;
852 unsigned int mscp_index;
853 unsigned char old_aborted;
855 void (*done)(struct scsi_cmnd *);
856 struct Scsi_Host *host = SCpnt->device->host;
859 return FAILED; /* Do not attempt an abort for the 24f */
861 /* Simple consistency checking */
862 if(!SCpnt->host_scribble)
865 mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp;
866 if (mscp_index >= ULTRASTOR_MAX_CMDS)
867 panic("Ux4F aborting invalid MSCP");
869 #if ULTRASTOR_DEBUG & UD_ABORT
872 int port0 = (config.slot << 12) | 0xc80;
876 spin_lock_irqsave(host->host_lock, flags);
877 strcpy(out, "OGM %d:%x ICM %d:%x ports: ");
878 for (i = 0; i < 16; i++)
880 unsigned char p = inb(port0 + i);
881 out[28 + i * 3] = "0123456789abcdef"[p >> 4];
882 out[29 + i * 3] = "0123456789abcdef"[p & 15];
883 out[30 + i * 3] = ' ';
885 out[28 + i * 3] = '\n';
887 ogm_status = inb(port0 + 22);
888 ogm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 23));
889 icm_status = inb(port0 + 27);
890 icm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 28));
891 spin_unlock_irqrestore(host->host_lock, flags);
894 /* First check to see if an interrupt is pending. I suspect the SiS
895 chipset loses interrupts. (I also suspect is mangles data, but
896 one bug at a time... */
897 if (config.slot ? inb(config.icm_address - 1) == 2 :
898 (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
900 printk("Ux4F: abort while completed command pending\n");
902 spin_lock_irqsave(host->host_lock, flags);
903 /* FIXME: Ewww... need to think about passing host around properly */
904 ultrastor_interrupt(NULL);
905 spin_unlock_irqrestore(host->host_lock, flags);
910 old_aborted = xchgb(DID_ABORT, &config.aborted[mscp_index]);
912 /* aborted == 0xff is the signal that queuecommand has not yet sent
913 the command. It will notice the new abort flag and fail. */
914 if (old_aborted == 0xff)
917 /* On 24F, send an abort MSCP request. The adapter will interrupt
918 and the interrupt handler will call done. */
919 if (config.slot && inb(config.ogm_address - 1) == 0)
923 spin_lock_irqsave(host->host_lock, flags);
924 outl(isa_virt_to_bus(&config.mscp[mscp_index]), config.ogm_address);
926 outb(0x80, config.ogm_address - 1);
927 outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
928 #if ULTRASTOR_DEBUG & UD_ABORT
929 log_ultrastor_abort(&config, mscp_index);
930 printk(out, ogm_status, ogm_addr, icm_status, icm_addr);
932 spin_unlock_irqrestore(host->host_lock, flags);
933 /* FIXME: add a wait for the abort to complete */
937 #if ULTRASTOR_DEBUG & UD_ABORT
938 log_ultrastor_abort(&config, mscp_index);
941 /* Can't request a graceful abort. Either this is not a 24F or
942 the OGM is busy. Don't free the command -- the adapter might
943 still be using it. Setting SCint = 0 causes the interrupt
944 handler to ignore the command. */
946 /* FIXME - devices that implement soft resets will still be running
947 the command after a bus reset. We would probably rather leave
948 the command in the queue. The upper level code will automatically
949 leave the command in the active state instead of requeueing it. ERY */
951 #if ULTRASTOR_DEBUG & UD_ABORT
952 if (config.mscp[mscp_index].SCint != SCpnt)
953 printk("abort: command mismatch, %p != %p\n",
954 config.mscp[mscp_index].SCint, SCpnt);
956 if (config.mscp[mscp_index].SCint == NULL)
959 if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort");
960 config.mscp[mscp_index].SCint = NULL;
961 done = config.mscp[mscp_index].done;
962 config.mscp[mscp_index].done = NULL;
963 SCpnt->result = DID_ABORT << 16;
965 /* Take the host lock to guard against scsi layer re-entry */
968 /* Need to set a timeout here in case command never completes. */
972 static int ultrastor_host_reset(struct scsi_cmnd * SCpnt)
976 struct Scsi_Host *host = SCpnt->device->host;
978 #if (ULTRASTOR_DEBUG & UD_RESET)
979 printk("US14F: reset: called\n");
985 spin_lock_irqsave(host->host_lock, flags);
986 /* Reset the adapter and SCSI bus. The SCSI bus reset can be
987 inhibited by clearing ultrastor_bus_reset before probe. */
988 outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address));
991 outb(0, config.ogm_address - 1);
992 outb(0, config.icm_address - 1);
995 #if ULTRASTOR_MAX_CMDS == 1
996 if (config.mscp_busy && config.mscp->done && config.mscp->SCint)
998 config.mscp->SCint->result = DID_RESET << 16;
999 config.mscp->done(config.mscp->SCint);
1001 config.mscp->SCint = 0;
1003 for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
1005 if (! (config.mscp_free & (1 << i)) &&
1006 config.mscp[i].done && config.mscp[i].SCint)
1008 config.mscp[i].SCint->result = DID_RESET << 16;
1009 config.mscp[i].done(config.mscp[i].SCint);
1010 config.mscp[i].done = NULL;
1012 config.mscp[i].SCint = NULL;
1016 /* FIXME - if the device implements soft resets, then the command
1017 will still be running. ERY
1019 Even bigger deal with new_eh!
1022 memset((unsigned char *)config.aborted, 0, sizeof config.aborted);
1023 #if ULTRASTOR_MAX_CMDS == 1
1024 config.mscp_busy = 0;
1026 config.mscp_free = ~0;
1029 spin_unlock_irqrestore(host->host_lock, flags);
1034 int ultrastor_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1035 sector_t capacity, int * dkinfo)
1037 int size = capacity;
1038 unsigned int s = config.heads * config.sectors;
1040 dkinfo[0] = config.heads;
1041 dkinfo[1] = config.sectors;
1042 dkinfo[2] = size / s; /* Ignore partial cylinders */
1044 if (dkinfo[2] > 1024)
1050 static void ultrastor_interrupt(void *dev_id)
1052 unsigned int status;
1053 #if ULTRASTOR_MAX_CMDS > 1
1054 unsigned int mscp_index;
1057 void (*done) (struct scsi_cmnd *);
1058 struct scsi_cmnd *SCtmp;
1060 #if ULTRASTOR_MAX_CMDS == 1
1061 mscp = &config.mscp[0];
1063 mscp = (struct mscp *)isa_bus_to_virt(inl(config.icm_address));
1064 mscp_index = mscp - config.mscp;
1065 if (mscp_index >= ULTRASTOR_MAX_CMDS) {
1066 printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp);
1067 /* A command has been lost. Reset and report an error
1068 for all commands. */
1069 ultrastor_host_reset(dev_id);
1074 /* Clean ICM slot (set ICMINT bit to 0) */
1076 unsigned char icm_status = inb(config.icm_address - 1);
1077 #if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT)
1078 if (icm_status != 1 && icm_status != 2)
1079 printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status,
1080 mscp_index, (unsigned int) mscp);
1082 /* The manual says clear interrupt then write 0 to ICM status.
1083 This seems backwards, but I'll do it anyway. --jfc */
1084 outb(2, SYS_DOORBELL_INTR(config.doorbell_address));
1085 outb(0, config.icm_address - 1);
1086 if (icm_status == 4) {
1087 printk("UltraStor abort command failed\n");
1090 if (icm_status == 3) {
1091 void (*done)(struct scsi_cmnd *) = mscp->done;
1094 mscp->SCint->result = DID_ABORT << 16;
1100 outb(1, SYS_DOORBELL_INTR(config.doorbell_address));
1103 SCtmp = mscp->SCint;
1108 #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
1109 printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp);
1111 #if ULTRASTOR_MAX_CMDS == 1
1112 config.mscp_busy = FALSE;
1114 set_bit(mscp_index, &config.mscp_free);
1116 config.aborted[mscp_index] = 0;
1120 /* Save done locally and zero before calling. This is needed as
1121 once we call done, we may get another command queued before this
1122 interrupt service routine can return. */
1126 /* Let the higher levels know that we're done */
1127 switch (mscp->adapter_status)
1130 status = DID_OK << 16;
1132 case 0x01: /* invalid command */
1133 case 0x02: /* invalid parameters */
1134 case 0x03: /* invalid data list */
1136 status = DID_ERROR << 16;
1138 case 0x84: /* SCSI bus abort */
1139 status = DID_ABORT << 16;
1142 status = DID_TIME_OUT << 16;
1146 SCtmp->result = status | mscp->target_status;
1148 SCtmp->host_scribble = NULL;
1150 /* Free up mscp block for next command */
1151 #if ULTRASTOR_MAX_CMDS == 1
1152 config.mscp_busy = FALSE;
1154 set_bit(mscp_index, &config.mscp_free);
1157 #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
1158 if (config.aborted[mscp_index])
1159 printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n",
1160 mscp_index, (unsigned int) mscp, config.aborted[mscp_index]);
1162 config.aborted[mscp_index] = 0;
1167 printk("US14F: interrupt: unexpected interrupt\n");
1169 if (config.slot ? inb(config.icm_address - 1) :
1170 (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
1171 #if (ULTRASTOR_DEBUG & UD_MULTI_CMD)
1172 printk("Ux4F: multiple commands completed\n");
1177 #if (ULTRASTOR_DEBUG & UD_INTERRUPT)
1178 printk("USx4F: interrupt: returning\n");
1182 static irqreturn_t do_ultrastor_interrupt(int irq, void *dev_id)
1184 unsigned long flags;
1185 struct Scsi_Host *dev = dev_id;
1187 spin_lock_irqsave(dev->host_lock, flags);
1188 ultrastor_interrupt(dev_id);
1189 spin_unlock_irqrestore(dev->host_lock, flags);
1193 MODULE_LICENSE("GPL");
1195 static struct scsi_host_template driver_template = {
1196 .name = "UltraStor 14F/24F/34F",
1197 .detect = ultrastor_detect,
1198 .release = ultrastor_release,
1199 .info = ultrastor_info,
1200 .queuecommand = ultrastor_queuecommand,
1201 .eh_abort_handler = ultrastor_abort,
1202 .eh_host_reset_handler = ultrastor_host_reset,
1203 .bios_param = ultrastor_biosparam,
1204 .can_queue = ULTRASTOR_MAX_CMDS,
1205 .sg_tablesize = ULTRASTOR_14F_MAX_SG,
1206 .cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN,
1207 .unchecked_isa_dma = 1,
1208 .use_clustering = ENABLE_CLUSTERING,
1210 #include "scsi_module.c"