![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ultrastor.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GnuMach] / Gnu-Mach / linux / src / drivers / scsi|
Return to ultrastor.c CVS log | Up to [GnuMach] / Gnu-Mach / linux / src / drivers / scsi |
1.1 root 1: /*
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: * ([email protected])
6: * scatter/gather added by Scott Taylor ([email protected])
7: * 24F and multiple command support by John F. Carr ([email protected])
8: * John's work modified by Caleb Epstein ([email protected]) and
9: * Eric Youngdale ([email protected]).
10: * Thanks to UltraStor for providing the necessary documentation
11: */
12:
13: /*
14: * TODO:
15: * 1. Find out why scatter/gather is limited to 16 requests per command.
16: * This is fixed, at least on the 24F, as of version 1.12 - CAE.
17: * 2. Look at command linking (mscp.command_link and
18: * mscp.command_link_id). (Does not work with many disks,
19: * and no performance increase. ERY).
20: * 3. Allow multiple adapters.
21: */
22:
23: /*
24: * NOTES:
25: * The UltraStor 14F, 24F, and 34F are a family of intelligent, high
26: * performance SCSI-2 host adapters. They all support command queueing
27: * and scatter/gather I/O. Some of them can also emulate the standard
28: * WD1003 interface for use with OS's which don't support SCSI. Here
29: * is the scoop on the various models:
30: * 14F - ISA first-party DMA HA with floppy support and WD1003 emulation.
31: * 14N - ISA HA with floppy support. I think that this is a non-DMA
32: * HA. Nothing further known.
33: * 24F - EISA Bus Master HA with floppy support and WD1003 emulation.
34: * 34F - VL-Bus Bus Master HA with floppy support (no WD1003 emulation).
35: *
36: * The 14F, 24F, and 34F are supported by this driver.
37: *
38: * Places flagged with a triple question-mark are things which are either
39: * unfinished, questionable, or wrong.
40: */
41:
42: /* Changes from version 1.11 alpha to 1.12
43: *
44: * Increased the size of the scatter-gather list to 33 entries for
45: * the 24F adapter (it was 16). I don't have the specs for the 14F
46: * or the 34F, so they may support larger s-g lists as well.
47: *
48: * Caleb Epstein <[email protected]>
49: */
50:
51: /* Changes from version 1.9 to 1.11
52: *
53: * Patches to bring this driver up to speed with the default kernel
54: * driver which supports only the 14F and 34F adapters. This version
55: * should compile cleanly into 0.99.13, 0.99.12 and probably 0.99.11.
56: *
57: * Fixes from Eric Youngdale to fix a few possible race conditions and
58: * several problems with bit testing operations (insufficient
59: * parentheses).
60: *
61: * Removed the ultrastor_abort() and ultrastor_reset() functions
62: * (enclosed them in #if 0 / #endif). These functions, at least on
63: * the 24F, cause the SCSI bus to do odd things and generally lead to
64: * kernel panics and machine hangs. This is like the Adaptec code.
65: *
66: * Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts.
67: */
68:
69: /* Changes from version 1.8 to version 1.9
70: *
71: * 0.99.11 patches ([email protected]) */
72:
73: /* Changes from version 1.7 to version 1.8
74: *
75: * Better error reporting.
76: */
77:
78: /* Changes from version 1.6 to version 1.7
79: *
80: * Removed CSIR command code.
81: *
82: * Better race condition avoidance (xchgb function added).
83: *
84: * Set ICM and OGM status to zero at probe (24F)
85: *
86: * reset sends soft reset to UltraStor adapter
87: *
88: * reset adapter if adapter interrupts with an invalid MSCP address
89: *
90: * handle aborted command interrupt (24F)
91: *
92: */
93:
94: /* Changes from version 1.5 to version 1.6:
95: *
96: * Read MSCP address from ICM _before_ clearing the interrupt flag.
97: * This fixes a race condition.
98: */
99:
100: /* Changes from version 1.4 to version 1.5:
101: *
102: * Abort now calls done when multiple commands are enabled.
103: *
104: * Clear busy when aborted command finishes, not when abort is called.
105: *
106: * More debugging messages for aborts.
107: */
108:
109: /* Changes from version 1.3 to version 1.4:
110: *
111: * Enable automatic request of sense data on error (requires newer version
112: * of scsi.c to be useful).
113: *
114: * Fix PORT_OVERRIDE for 14F.
115: *
116: * Fix abort and reset to work properly (config.aborted wasn't cleared
117: * after it was tested, so after a command abort no further commands would
118: * work).
119: *
120: * Boot time test to enable SCSI bus reset (defaults to not allowing reset).
121: *
122: * Fix test for OGM busy -- the busy bit is in different places on the 24F.
123: *
124: * Release ICM slot by clearing first byte on 24F.
125: */
126:
127: #ifdef MODULE
128: #include <linux/module.h>
129: #endif
130:
131: #include <linux/stddef.h>
132: #include <linux/string.h>
133: #include <linux/sched.h>
134: #include <linux/kernel.h>
135: #include <linux/ioport.h>
136: #include <linux/proc_fs.h>
137: #include <asm/io.h>
138: #include <asm/bitops.h>
139: #include <asm/system.h>
140: #include <asm/dma.h>
141:
142: #define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */
143: #include <linux/blk.h>
144: #include "scsi.h"
145: #include "hosts.h"
146: #include "ultrastor.h"
147: #include "sd.h"
148: #include<linux/stat.h>
149:
150: struct proc_dir_entry proc_scsi_ultrastor = {
151: PROC_SCSI_ULTRASTOR, 9, "ultrastor",
152: S_IFDIR | S_IRUGO | S_IXUGO, 2
153: };
154:
155: #define FALSE 0
156: #define TRUE 1
157:
158: #ifndef ULTRASTOR_DEBUG
159: #define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET)
160: #endif
161:
162: #define VERSION "1.12"
163:
164: #define ARRAY_SIZE(arr) (sizeof (arr) / sizeof (arr)[0])
165:
166: #define PACKED __attribute__((packed))
167: #define ALIGNED(x) __attribute__((aligned(x)))
168:
169:
170: /* The 14F uses an array of 4-byte ints for its scatter/gather list.
171: The data can be unaligned, but need not be. It's easier to give
172: the list normal alignment since it doesn't need to fit into a
173: packed structure. */
174:
175: typedef struct {
176: unsigned int address;
177: unsigned int num_bytes;
178: } ultrastor_sg_list;
179:
180:
181: /* MailBox SCSI Command Packet. Basic command structure for communicating
182: with controller. */
183: struct mscp {
184: unsigned char opcode: 3; /* type of command */
185: unsigned char xdir: 2; /* data transfer direction */
186: unsigned char dcn: 1; /* disable disconnect */
187: unsigned char ca: 1; /* use cache (if available) */
188: unsigned char sg: 1; /* scatter/gather operation */
189: unsigned char target_id: 3; /* target SCSI id */
190: unsigned char ch_no: 2; /* SCSI channel (always 0 for 14f) */
191: unsigned char lun: 3; /* logical unit number */
192: unsigned int transfer_data PACKED; /* transfer data pointer */
193: unsigned int transfer_data_length PACKED; /* length in bytes */
194: unsigned int command_link PACKED; /* for linking command chains */
195: unsigned char scsi_command_link_id; /* identifies command in chain */
196: unsigned char number_of_sg_list; /* (if sg is set) 8 bytes per list */
197: unsigned char length_of_sense_byte;
198: unsigned char length_of_scsi_cdbs; /* 6, 10, or 12 */
199: unsigned char scsi_cdbs[12]; /* SCSI commands */
200: unsigned char adapter_status; /* non-zero indicates HA error */
201: unsigned char target_status; /* non-zero indicates target error */
202: unsigned int sense_data PACKED;
203: /* The following fields are for software only. They are included in
204: the MSCP structure because they are associated with SCSI requests. */
205: void (*done)(Scsi_Cmnd *);
206: Scsi_Cmnd *SCint;
207: ultrastor_sg_list sglist[ULTRASTOR_24F_MAX_SG]; /* use larger size for 24F */
208: };
209:
210:
211: /* Port addresses (relative to the base address) */
212: #define U14F_PRODUCT_ID(port) ((port) + 0x4)
213: #define CONFIG(port) ((port) + 0x6)
214:
215: /* Port addresses relative to the doorbell base address. */
216: #define LCL_DOORBELL_MASK(port) ((port) + 0x0)
217: #define LCL_DOORBELL_INTR(port) ((port) + 0x1)
218: #define SYS_DOORBELL_MASK(port) ((port) + 0x2)
219: #define SYS_DOORBELL_INTR(port) ((port) + 0x3)
220:
221:
222: /* Used to store configuration info read from config i/o registers. Most of
223: this is not used yet, but might as well save it.
224:
225: This structure also holds port addresses that are not at the same offset
226: on the 14F and 24F.
227:
228: This structure holds all data that must be duplicated to support multiple
229: adapters. */
230:
231: static struct ultrastor_config
232: {
233: unsigned short port_address; /* base address of card */
234: unsigned short doorbell_address; /* base address of doorbell CSRs */
235: unsigned short ogm_address; /* base address of OGM */
236: unsigned short icm_address; /* base address of ICM */
237: const void *bios_segment;
238: unsigned char interrupt: 4;
239: unsigned char dma_channel: 3;
240: unsigned char bios_drive_number: 1;
241: unsigned char heads;
242: unsigned char sectors;
243: unsigned char ha_scsi_id: 3;
244: unsigned char subversion: 4;
245: unsigned char revision;
246: /* The slot number is used to distinguish the 24F (slot != 0) from
247: the 14F and 34F (slot == 0). */
248: unsigned char slot;
249:
250: #ifdef PRINT_U24F_VERSION
251: volatile int csir_done;
252: #endif
253:
254: /* A pool of MSCP structures for this adapter, and a bitmask of
255: busy structures. (If ULTRASTOR_14F_MAX_CMDS == 1, a 1 byte
256: busy flag is used instead.) */
257:
258: #if ULTRASTOR_MAX_CMDS == 1
259: unsigned char mscp_busy;
260: #else
261: unsigned short mscp_free;
262: #endif
263: volatile unsigned char aborted[ULTRASTOR_MAX_CMDS];
264: struct mscp mscp[ULTRASTOR_MAX_CMDS];
265: } config = {0};
266:
267: /* Set this to 1 to reset the SCSI bus on error. */
268: int ultrastor_bus_reset = 0;
269:
270:
271: /* Allowed BIOS base addresses (NULL indicates reserved) */
272: static const void *const bios_segment_table[8] = {
273: NULL, (void *)0xC4000, (void *)0xC8000, (void *)0xCC000,
274: (void *)0xD0000, (void *)0xD4000, (void *)0xD8000, (void *)0xDC000,
275: };
276:
277: /* Allowed IRQs for 14f */
278: static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 };
279:
280: /* Allowed DMA channels for 14f (0 indicates reserved) */
281: static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 };
282:
283: /* Head/sector mappings allowed by 14f */
284: static const struct {
285: unsigned char heads;
286: unsigned char sectors;
287: } mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } };
288:
289: #ifndef PORT_OVERRIDE
290: /* ??? A probe of address 0x310 screws up NE2000 cards */
291: static const unsigned short ultrastor_ports_14f[] = {
292: 0x330, 0x340, /*0x310,*/ 0x230, 0x240, 0x210, 0x130, 0x140,
293: };
294: #endif
295:
296: static void ultrastor_interrupt(int, void *, struct pt_regs *);
297: static inline void build_sg_list(struct mscp *, Scsi_Cmnd *SCpnt);
298:
299:
300: static inline int find_and_clear_bit_16(unsigned short *field)
301: {
302: int rv;
303: unsigned long flags;
304:
305: save_flags(flags);
306: cli();
307: if (*field == 0) panic("No free mscp");
308: asm("xorl %0,%0\n0:\tbsfw %1,%w0\n\tbtr %0,%1\n\tjnc 0b"
309: : "=&r" (rv), "=m" (*field) : "1" (*field));
310: restore_flags(flags);
311: return rv;
312: }
313:
314: /* This has been re-implemented with the help of Richard Earnshaw,
315: <[email protected]> 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
318:
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
321: to gcc. --jfc */
322: static inline unsigned char xchgb(unsigned char reg,
323: volatile unsigned char *mem)
324: {
325: __asm__ ("xchgb %0,%1" : "=q" (reg), "=m" (*mem) : "0" (reg));
326: return reg;
327: }
328:
329: #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
330:
331: static void log_ultrastor_abort(register struct ultrastor_config *config,
332: int command)
333: {
334: static char fmt[80] = "abort %d (%x); MSCP free pool: %x;";
335: register int i;
336: int flags;
337: save_flags(flags);
338: cli();
339:
340: for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
341: {
342: fmt[20 + i*2] = ' ';
343: if (! (config->mscp_free & (1 << i)))
344: fmt[21 + i*2] = '0' + config->mscp[i].target_id;
345: else
346: fmt[21 + i*2] = '-';
347: }
348: fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n';
349: fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0;
350: printk(fmt, command, &config->mscp[command], config->mscp_free);
351: restore_flags(flags);
352: }
353: #endif
354:
355: static int ultrastor_14f_detect(Scsi_Host_Template * tpnt)
356: {
357: size_t i;
358: unsigned char in_byte, version_byte = 0;
359: struct config_1 {
360: unsigned char bios_segment: 3;
361: unsigned char removable_disks_as_fixed: 1;
362: unsigned char interrupt: 2;
363: unsigned char dma_channel: 2;
364: } config_1;
365: struct config_2 {
366: unsigned char ha_scsi_id: 3;
367: unsigned char mapping_mode: 2;
368: unsigned char bios_drive_number: 1;
369: unsigned char tfr_port: 2;
370: } config_2;
371:
372: #if (ULTRASTOR_DEBUG & UD_DETECT)
373: printk("US14F: detect: called\n");
374: #endif
375:
376: /* If a 24F has already been configured, don't look for a 14F. */
377: if (config.bios_segment)
378: return FALSE;
379:
380: #ifdef PORT_OVERRIDE
381: if(check_region(PORT_OVERRIDE, 0xc)) {
382: printk("Ultrastor I/O space already in use\n");
383: return FALSE;
384: };
385: config.port_address = PORT_OVERRIDE;
386: #else
387: for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) {
388: if(check_region(ultrastor_ports_14f[i], 0x0c)) continue;
389: config.port_address = ultrastor_ports_14f[i];
390: #endif
391:
392: #if (ULTRASTOR_DEBUG & UD_DETECT)
393: printk("US14F: detect: testing port address %03X\n", config.port_address);
394: #endif
395:
396: in_byte = inb(U14F_PRODUCT_ID(config.port_address));
397: if (in_byte != US14F_PRODUCT_ID_0) {
398: #if (ULTRASTOR_DEBUG & UD_DETECT)
399: # ifdef PORT_OVERRIDE
400: printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte);
401: # else
402: printk("US14F: detect: no adapter at port %03X\n", config.port_address);
403: # endif
404: #endif
405: #ifdef PORT_OVERRIDE
406: return FALSE;
407: #else
408: continue;
409: #endif
410: }
411: in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1);
412: /* Only upper nibble is significant for Product ID 1 */
413: if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) {
414: #if (ULTRASTOR_DEBUG & UD_DETECT)
415: # ifdef PORT_OVERRIDE
416: printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte);
417: # else
418: printk("US14F: detect: no adapter at port %03X\n", config.port_address);
419: # endif
420: #endif
421: #ifdef PORT_OVERRIDE
422: return FALSE;
423: #else
424: continue;
425: #endif
426: }
427: version_byte = in_byte;
428: #ifndef PORT_OVERRIDE
429: break;
430: }
431: if (i == ARRAY_SIZE(ultrastor_ports_14f)) {
432: # if (ULTRASTOR_DEBUG & UD_DETECT)
433: printk("US14F: detect: no port address found!\n");
434: # endif
435: return FALSE;
436: }
437: #endif
438:
439: #if (ULTRASTOR_DEBUG & UD_DETECT)
440: printk("US14F: detect: adapter found at port address %03X\n",
441: config.port_address);
442: #endif
443:
444: /* Set local doorbell mask to disallow bus reset unless
445: ultrastor_bus_reset is true. */
446: outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address));
447:
448: /* All above tests passed, must be the right thing. Get some useful
449: info. */
450:
451: request_region(config.port_address, 0x0c,"ultrastor");
452: /* Register the I/O space that we use */
453:
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;
468: else
469: config.dma_channel = dma_channel_table_14f[config_1.dma_channel];
470:
471: if (!config.bios_segment) {
472: #if (ULTRASTOR_DEBUG & UD_DETECT)
473: printk("US14F: detect: not detected.\n");
474: #endif
475: return FALSE;
476: }
477:
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");
483: #endif
484: return FALSE;
485: }
486:
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
489: exhausted! */
490:
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"
496: " Interrupt: %u\n"
497: " DMA channel: %u\n"
498: " H/A SCSI ID: %u\n"
499: " Subversion: %u\n",
500: config.port_address, config.bios_segment, config.interrupt,
501: config.dma_channel, config.ha_scsi_id, config.subversion);
502: #endif
503: tpnt->this_id = config.ha_scsi_id;
504: tpnt->unchecked_isa_dma = (config.subversion != U34F);
505:
506: #if ULTRASTOR_MAX_CMDS > 1
507: config.mscp_free = ~0;
508: #endif
509:
510: if (request_irq(config.interrupt, ultrastor_interrupt, 0, "Ultrastor", NULL)) {
511: printk("Unable to allocate IRQ%u for UltraStor controller.\n",
512: config.interrupt);
513: return FALSE;
514: }
515: if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) {
516: printk("Unable to allocate DMA channel %u for UltraStor controller.\n",
517: config.dma_channel);
518: free_irq(config.interrupt, NULL);
519: return FALSE;
520: }
521: tpnt->sg_tablesize = ULTRASTOR_14F_MAX_SG;
522: printk("UltraStor driver version" VERSION ". Using %d SG lists.\n",
523: ULTRASTOR_14F_MAX_SG);
524:
525: return TRUE;
526: }
527:
528: static int ultrastor_24f_detect(Scsi_Host_Template * tpnt)
529: {
530: register int i;
531: struct Scsi_Host * shpnt = NULL;
532:
533: #if (ULTRASTOR_DEBUG & UD_DETECT)
534: printk("US24F: detect");
535: #endif
536:
537: /* probe each EISA slot at slot address C80 */
538: for (i = 1; i < 15; i++)
539: {
540: unsigned char config_1, config_2;
541: unsigned short addr = (i << 12) | ULTRASTOR_24F_PORT;
542:
543: if (inb(addr) != US24F_PRODUCT_ID_0 &&
544: inb(addr+1) != US24F_PRODUCT_ID_1 &&
545: inb(addr+2) != US24F_PRODUCT_ID_2)
546: continue;
547:
548: config.revision = inb(addr+3);
549: config.slot = i;
550: if (! (inb(addr+4) & 1))
551: {
552: #if (ULTRASTOR_DEBUG & UD_DETECT)
553: printk("U24F: found disabled card in slot %u\n", i);
554: #endif
555: continue;
556: }
557: #if (ULTRASTOR_DEBUG & UD_DETECT)
558: printk("U24F: found card in slot %u\n", i);
559: #endif
560: config_1 = inb(addr + 5);
561: config.bios_segment = bios_segment_table[config_1 & 7];
562: switch(config_1 >> 4)
563: {
564: case 1:
565: config.interrupt = 15;
566: break;
567: case 2:
568: config.interrupt = 14;
569: break;
570: case 4:
571: config.interrupt = 11;
572: break;
573: case 8:
574: config.interrupt = 10;
575: break;
576: default:
577: printk("U24F: invalid IRQ\n");
578: return FALSE;
579: }
580: if (request_irq(config.interrupt, ultrastor_interrupt, 0, "Ultrastor", NULL))
581: {
582: printk("Unable to allocate IRQ%u for UltraStor controller.\n",
583: config.interrupt);
584: return FALSE;
585: }
586: /* BIOS addr set */
587: /* base port set */
588: config.port_address = addr;
589: config.doorbell_address = addr + 12;
590: config.ogm_address = addr + 0x17;
591: config.icm_address = addr + 0x1C;
592: config_2 = inb(addr + 7);
593: config.ha_scsi_id = config_2 & 7;
594: config.heads = mapping_table[(config_2 >> 3) & 3].heads;
595: config.sectors = mapping_table[(config_2 >> 3) & 3].sectors;
596: #if (ULTRASTOR_DEBUG & UD_DETECT)
597: printk("US24F: detect: detect succeeded\n"
598: " Port address: %03X\n"
599: " BIOS segment: %05X\n"
600: " Interrupt: %u\n"
601: " H/A SCSI ID: %u\n",
602: config.port_address, config.bios_segment,
603: config.interrupt, config.ha_scsi_id);
604: #endif
605: tpnt->this_id = config.ha_scsi_id;
606: tpnt->unchecked_isa_dma = 0;
607: tpnt->sg_tablesize = ULTRASTOR_24F_MAX_SG;
608:
609: shpnt = scsi_register(tpnt, 0);
610: shpnt->irq = config.interrupt;
611: shpnt->dma_channel = config.dma_channel;
612: shpnt->io_port = config.port_address;
613:
614: #if ULTRASTOR_MAX_CMDS > 1
615: config.mscp_free = ~0;
616: #endif
617: /* Mark ICM and OGM free */
618: outb(0, addr + 0x16);
619: outb(0, addr + 0x1B);
620:
621: /* Set local doorbell mask to disallow bus reset unless
622: ultrastor_bus_reset is true. */
623: outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12));
624: outb(0x02, SYS_DOORBELL_MASK(addr+12));
625: printk("UltraStor driver version " VERSION ". Using %d SG lists.\n",
626: tpnt->sg_tablesize);
627: return TRUE;
628: }
629: return FALSE;
630: }
631:
632: int ultrastor_detect(Scsi_Host_Template * tpnt)
633: {
634: tpnt->proc_dir = &proc_scsi_ultrastor;
635: return ultrastor_14f_detect(tpnt) || ultrastor_24f_detect(tpnt);
636: }
637:
638: const char *ultrastor_info(struct Scsi_Host * shpnt)
639: {
640: static char buf[64];
641:
642: if (config.slot)
643: sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u",
644: config.slot, config.interrupt);
645: else if (config.subversion)
646: sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u",
647: config.port_address, (int)config.bios_segment,
648: config.interrupt);
649: else
650: sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u",
651: config.port_address, (int)config.bios_segment,
652: config.interrupt, config.dma_channel);
653: return buf;
654: }
655:
656: static inline void build_sg_list(register struct mscp *mscp, Scsi_Cmnd *SCpnt)
657: {
658: struct scatterlist *sl;
659: long transfer_length = 0;
660: int i, max;
661:
662: sl = (struct scatterlist *) SCpnt->request_buffer;
663: max = SCpnt->use_sg;
664: for (i = 0; i < max; i++) {
665: mscp->sglist[i].address = (unsigned int)sl[i].address;
666: mscp->sglist[i].num_bytes = sl[i].length;
667: transfer_length += sl[i].length;
668: }
669: mscp->number_of_sg_list = max;
670: mscp->transfer_data = (unsigned int)mscp->sglist;
671: /* ??? May not be necessary. Docs are unclear as to whether transfer
672: length field is ignored or whether it should be set to the total
673: number of bytes of the transfer. */
674: mscp->transfer_data_length = transfer_length;
675: }
676:
677: int ultrastor_queuecommand(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
678: {
679: register struct mscp *my_mscp;
680: #if ULTRASTOR_MAX_CMDS > 1
681: int mscp_index;
682: #endif
683: unsigned int status;
684: int flags;
685:
686: /* Next test is for debugging; "can't happen" */
687: if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0)
688: panic("ultrastor_queuecommand: no free MSCP\n");
689: mscp_index = find_and_clear_bit_16(&config.mscp_free);
690:
691: /* Has the command been aborted? */
692: if (xchgb(0xff, &config.aborted[mscp_index]) != 0)
693: {
694: status = DID_ABORT << 16;
695: goto aborted;
696: }
697:
698: my_mscp = &config.mscp[mscp_index];
699:
700: #if 1
701: /* This way is faster. */
702: *(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3);
703: #else
704: my_mscp->opcode = OP_SCSI;
705: my_mscp->xdir = DTD_SCSI;
706: my_mscp->dcn = FALSE;
707: #endif
708: /* Tape drives don't work properly if the cache is used. The SCSI
709: READ command for a tape doesn't have a block offset, and the adapter
710: incorrectly assumes that all reads from the tape read the same
711: blocks. Results will depend on read buffer size and other disk
712: activity.
713:
714: ??? Which other device types should never use the cache? */
715: my_mscp->ca = SCpnt->device->type != TYPE_TAPE;
716: my_mscp->target_id = SCpnt->target;
717: my_mscp->ch_no = 0;
718: my_mscp->lun = SCpnt->lun;
719: if (SCpnt->use_sg) {
720: /* Set scatter/gather flag in SCSI command packet */
721: my_mscp->sg = TRUE;
722: build_sg_list(my_mscp, SCpnt);
723: } else {
724: /* Unset scatter/gather flag in SCSI command packet */
725: my_mscp->sg = FALSE;
726: my_mscp->transfer_data = (unsigned int)SCpnt->request_buffer;
727: my_mscp->transfer_data_length = SCpnt->request_bufflen;
728: }
729: my_mscp->command_link = 0; /*???*/
730: my_mscp->scsi_command_link_id = 0; /*???*/
731: my_mscp->length_of_sense_byte = sizeof SCpnt->sense_buffer;
732: my_mscp->length_of_scsi_cdbs = SCpnt->cmd_len;
733: memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs);
734: my_mscp->adapter_status = 0;
735: my_mscp->target_status = 0;
736: my_mscp->sense_data = (unsigned int)&SCpnt->sense_buffer;
737: my_mscp->done = done;
738: my_mscp->SCint = SCpnt;
739: SCpnt->host_scribble = (unsigned char *)my_mscp;
740:
741: /* Find free OGM slot. On 24F, look for OGM status byte == 0.
742: On 14F and 34F, wait for local interrupt pending flag to clear. */
743:
744: retry:
745: if (config.slot)
746: while (inb(config.ogm_address - 1) != 0 &&
747: config.aborted[mscp_index] == 0xff) barrier();
748:
749: /* else??? */
750:
751: while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) &
752: (config.slot ? 2 : 1))
753: && config.aborted[mscp_index] == 0xff) barrier();
754:
755: /* To avoid race conditions, make the code to write to the adapter
756: atomic. This simplifies the abort code. */
757:
758: save_flags(flags);
759: cli();
760:
761: if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) &
762: (config.slot ? 2 : 1))
763: {
764: restore_flags(flags);
765: goto retry;
766: }
767:
768: status = xchgb(0, &config.aborted[mscp_index]);
769: if (status != 0xff) {
770: restore_flags(flags);
771:
772: #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT)
773: printk("USx4F: queuecommand: aborted\n");
774: #if ULTRASTOR_MAX_CMDS > 1
775: log_ultrastor_abort(&config, mscp_index);
776: #endif
777: #endif
778: status <<= 16;
779:
780: aborted:
781: set_bit(mscp_index, &config.mscp_free);
782: /* If the driver queues commands, call the done proc here. Otherwise
783: return an error. */
784: #if ULTRASTOR_MAX_CMDS > 1
785: SCpnt->result = status;
786: done(SCpnt);
787: return 0;
788: #else
789: return status;
790: #endif
791: }
792:
793: /* Store pointer in OGM address bytes */
794: outl((unsigned int)my_mscp, config.ogm_address);
795:
796: /* Issue OGM interrupt */
797: if (config.slot) {
798: /* Write OGM command register on 24F */
799: outb(1, config.ogm_address - 1);
800: outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
801: } else {
802: outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address));
803: }
804:
805: restore_flags(flags);
806:
807: #if (ULTRASTOR_DEBUG & UD_COMMAND)
808: printk("USx4F: queuecommand: returning\n");
809: #endif
810:
811: return 0;
812: }
813:
814: /* This code must deal with 2 cases:
815:
816: 1. The command has not been written to the OGM. In this case, set
817: the abort flag and return.
818:
819: 2. The command has been written to the OGM and is stuck somewhere in
820: the adapter.
821:
822: 2a. On a 24F, ask the adapter to abort the command. It will interrupt
823: when it does.
824:
825: 2b. Call the command's done procedure.
826:
827: */
828:
829: int ultrastor_abort(Scsi_Cmnd *SCpnt)
830: {
831: #if ULTRASTOR_DEBUG & UD_ABORT
832: char out[108];
833: unsigned char icm_status = 0, ogm_status = 0;
834: unsigned int icm_addr = 0, ogm_addr = 0;
835: #endif
836: unsigned int mscp_index;
837: unsigned char old_aborted;
838: void (*done)(Scsi_Cmnd *);
839:
840: if(config.slot)
841: return SCSI_ABORT_SNOOZE; /* Do not attempt an abort for the 24f */
842:
843: /* Simple consistency checking */
844: if(!SCpnt->host_scribble)
845: return SCSI_ABORT_NOT_RUNNING;
846:
847: mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp;
848: if (mscp_index >= ULTRASTOR_MAX_CMDS)
849: panic("Ux4F aborting invalid MSCP");
850:
851: #if ULTRASTOR_DEBUG & UD_ABORT
852: if (config.slot)
853: {
854: int port0 = (config.slot << 12) | 0xc80;
855: int i;
856: int flags;
857: save_flags(flags);
858: cli();
859: strcpy(out, "OGM %d:%x ICM %d:%x ports: ");
860: for (i = 0; i < 16; i++)
861: {
862: unsigned char p = inb(port0 + i);
863: out[28 + i * 3] = "0123456789abcdef"[p >> 4];
864: out[29 + i * 3] = "0123456789abcdef"[p & 15];
865: out[30 + i * 3] = ' ';
866: }
867: out[28 + i * 3] = '\n';
868: out[29 + i * 3] = 0;
869: ogm_status = inb(port0 + 22);
870: ogm_addr = inl(port0 + 23);
871: icm_status = inb(port0 + 27);
872: icm_addr = inl(port0 + 28);
873: restore_flags(flags);
874: }
875:
876: /* First check to see if an interrupt is pending. I suspect the SiS
877: chipset loses interrupts. (I also suspect is mangles data, but
878: one bug at a time... */
879: if (config.slot ? inb(config.icm_address - 1) == 2 :
880: (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
881: {
882: int flags;
883: save_flags(flags);
884: printk("Ux4F: abort while completed command pending\n");
885: restore_flags(flags);
886: cli();
887: ultrastor_interrupt(0, NULL, NULL);
888: restore_flags(flags);
889: return SCSI_ABORT_SUCCESS; /* FIXME - is this correct? -ERY */
890: }
891: #endif
892:
893: old_aborted = xchgb(DID_ABORT, &config.aborted[mscp_index]);
894:
895: /* aborted == 0xff is the signal that queuecommand has not yet sent
896: the command. It will notice the new abort flag and fail. */
897: if (old_aborted == 0xff)
898: return SCSI_ABORT_SUCCESS;
899:
900: /* On 24F, send an abort MSCP request. The adapter will interrupt
901: and the interrupt handler will call done. */
902: if (config.slot && inb(config.ogm_address - 1) == 0)
903: {
904: int flags;
905:
906: save_flags(flags);
907: cli();
908: outl((int)&config.mscp[mscp_index], config.ogm_address);
909: inb(0xc80); /* delay */
910: outb(0x80, config.ogm_address - 1);
911: outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address));
912: #if ULTRASTOR_DEBUG & UD_ABORT
913: log_ultrastor_abort(&config, mscp_index);
914: printk(out, ogm_status, ogm_addr, icm_status, icm_addr);
915: #endif
916: restore_flags(flags);
917: return SCSI_ABORT_PENDING;
918: }
919:
920: #if ULTRASTOR_DEBUG & UD_ABORT
921: log_ultrastor_abort(&config, mscp_index);
922: #endif
923:
924: /* Can't request a graceful abort. Either this is not a 24F or
925: the OGM is busy. Don't free the command -- the adapter might
926: still be using it. Setting SCint = 0 causes the interrupt
927: handler to ignore the command. */
928:
929: /* FIXME - devices that implement soft resets will still be running
930: the command after a bus reset. We would probably rather leave
931: the command in the queue. The upper level code will automatically
932: leave the command in the active state instead of requeueing it. ERY */
933:
934: #if ULTRASTOR_DEBUG & UD_ABORT
935: if (config.mscp[mscp_index].SCint != SCpnt)
936: printk("abort: command mismatch, %p != %p\n",
937: config.mscp[mscp_index].SCint, SCpnt);
938: #endif
939: if (config.mscp[mscp_index].SCint == 0)
940: return SCSI_ABORT_NOT_RUNNING;
941:
942: if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort");
943: config.mscp[mscp_index].SCint = 0;
944: done = config.mscp[mscp_index].done;
945: config.mscp[mscp_index].done = 0;
946: SCpnt->result = DID_ABORT << 16;
947: /* I worry about reentrancy in scsi.c */
948: done(SCpnt);
949:
950: /* Need to set a timeout here in case command never completes. */
951: return SCSI_ABORT_SUCCESS;
952: }
953:
954: int ultrastor_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
955: {
956: int flags;
957: register int i;
958: #if (ULTRASTOR_DEBUG & UD_RESET)
959: printk("US14F: reset: called\n");
960: #endif
961:
962: if(config.slot)
963: return SCSI_RESET_PUNT; /* Do not attempt a reset for the 24f */
964:
965: save_flags(flags);
966: cli();
967:
968: /* Reset the adapter and SCSI bus. The SCSI bus reset can be
969: inhibited by clearing ultrastor_bus_reset before probe. */
970: outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address));
971: if (config.slot)
972: {
973: outb(0, config.ogm_address - 1);
974: outb(0, config.icm_address - 1);
975: }
976:
977: #if ULTRASTOR_MAX_CMDS == 1
978: if (config.mscp_busy && config.mscp->done && config.mscp->SCint)
979: {
980: config.mscp->SCint->result = DID_RESET << 16;
981: config.mscp->done(config.mscp->SCint);
982: }
983: config.mscp->SCint = 0;
984: #else
985: for (i = 0; i < ULTRASTOR_MAX_CMDS; i++)
986: {
987: if (! (config.mscp_free & (1 << i)) &&
988: config.mscp[i].done && config.mscp[i].SCint)
989: {
990: config.mscp[i].SCint->result = DID_RESET << 16;
991: config.mscp[i].done(config.mscp[i].SCint);
992: config.mscp[i].done = 0;
993: }
994: config.mscp[i].SCint = 0;
995: }
996: #endif
997:
998: /* FIXME - if the device implements soft resets, then the command
999: will still be running. ERY */
1000:
1001: memset((unsigned char *)config.aborted, 0, sizeof config.aborted);
1002: #if ULTRASTOR_MAX_CMDS == 1
1003: config.mscp_busy = 0;
1004: #else
1005: config.mscp_free = ~0;
1006: #endif
1007:
1008: restore_flags(flags);
1009: return SCSI_RESET_SUCCESS;
1010:
1011: }
1012:
1013: int ultrastor_biosparam(Disk * disk, kdev_t dev, int * dkinfo)
1014: {
1015: int size = disk->capacity;
1016: unsigned int s = config.heads * config.sectors;
1017:
1018: dkinfo[0] = config.heads;
1019: dkinfo[1] = config.sectors;
1020: dkinfo[2] = size / s; /* Ignore partial cylinders */
1021: #if 0
1022: if (dkinfo[2] > 1024)
1023: dkinfo[2] = 1024;
1024: #endif
1025: return 0;
1026: }
1027:
1028: static void ultrastor_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1029: {
1030: unsigned int status;
1031: #if ULTRASTOR_MAX_CMDS > 1
1032: unsigned int mscp_index;
1033: #endif
1034: register struct mscp *mscp;
1035: void (*done)(Scsi_Cmnd *);
1036: Scsi_Cmnd *SCtmp;
1037:
1038: #if ULTRASTOR_MAX_CMDS == 1
1039: mscp = &config.mscp[0];
1040: #else
1041: mscp = (struct mscp *)inl(config.icm_address);
1042: mscp_index = mscp - config.mscp;
1043: if (mscp_index >= ULTRASTOR_MAX_CMDS) {
1044: printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp);
1045: /* A command has been lost. Reset and report an error
1046: for all commands. */
1047: ultrastor_reset(NULL, 0);
1048: return;
1049: }
1050: #endif
1051:
1052: /* Clean ICM slot (set ICMINT bit to 0) */
1053: if (config.slot) {
1054: unsigned char icm_status = inb(config.icm_address - 1);
1055: #if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT)
1056: if (icm_status != 1 && icm_status != 2)
1057: printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status,
1058: mscp_index, (unsigned int) mscp);
1059: #endif
1060: /* The manual says clear interrupt then write 0 to ICM status.
1061: This seems backwards, but I'll do it anyway. --jfc */
1062: outb(2, SYS_DOORBELL_INTR(config.doorbell_address));
1063: outb(0, config.icm_address - 1);
1064: if (icm_status == 4) {
1065: printk("UltraStor abort command failed\n");
1066: return;
1067: }
1068: if (icm_status == 3) {
1069: void (*done)(Scsi_Cmnd *) = mscp->done;
1070: if (done) {
1071: mscp->done = 0;
1072: mscp->SCint->result = DID_ABORT << 16;
1073: done(mscp->SCint);
1074: }
1075: return;
1076: }
1077: } else {
1078: outb(1, SYS_DOORBELL_INTR(config.doorbell_address));
1079: }
1080:
1081: SCtmp = mscp->SCint;
1082: mscp->SCint = NULL;
1083:
1084: if (SCtmp == 0)
1085: {
1086: #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
1087: printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp);
1088: #endif
1089: #if ULTRASTOR_MAX_CMDS == 1
1090: config.mscp_busy = FALSE;
1091: #else
1092: set_bit(mscp_index, &config.mscp_free);
1093: #endif
1094: config.aborted[mscp_index] = 0;
1095: return;
1096: }
1097:
1098: /* Save done locally and zero before calling. This is needed as
1099: once we call done, we may get another command queued before this
1100: interrupt service routine can return. */
1101: done = mscp->done;
1102: mscp->done = 0;
1103:
1104: /* Let the higher levels know that we're done */
1105: switch (mscp->adapter_status)
1106: {
1107: case 0:
1108: status = DID_OK << 16;
1109: break;
1110: case 0x01: /* invalid command */
1111: case 0x02: /* invalid parameters */
1112: case 0x03: /* invalid data list */
1113: default:
1114: status = DID_ERROR << 16;
1115: break;
1116: case 0x84: /* SCSI bus abort */
1117: status = DID_ABORT << 16;
1118: break;
1119: case 0x91:
1120: status = DID_TIME_OUT << 16;
1121: break;
1122: }
1123:
1124: SCtmp->result = status | mscp->target_status;
1125:
1126: SCtmp->host_scribble = 0;
1127:
1128: /* Free up mscp block for next command */
1129: #if ULTRASTOR_MAX_CMDS == 1
1130: config.mscp_busy = FALSE;
1131: #else
1132: set_bit(mscp_index, &config.mscp_free);
1133: #endif
1134:
1135: #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT)
1136: if (config.aborted[mscp_index])
1137: printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n",
1138: mscp_index, (unsigned int) mscp, config.aborted[mscp_index]);
1139: #endif
1140: config.aborted[mscp_index] = 0;
1141:
1142: if (done)
1143: done(SCtmp);
1144: else
1145: printk("US14F: interrupt: unexpected interrupt\n");
1146:
1147: if (config.slot ? inb(config.icm_address - 1) :
1148: (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1))
1149: #if (ULTRASTOR_DEBUG & UD_MULTI_CMD)
1150: printk("Ux4F: multiple commands completed\n");
1151: #else
1152: ;
1153: #endif
1154:
1155: #if (ULTRASTOR_DEBUG & UD_INTERRUPT)
1156: printk("USx4F: interrupt: returning\n");
1157: #endif
1158: }
1159:
1160: #ifdef MODULE
1161: /* Eventually this will go into an include file, but this will be later */
1162: Scsi_Host_Template driver_template = ULTRASTOR_14F;
1163:
1164: #include "scsi_module.c"
1165: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.