Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * (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 |
| 11 | * |
| 12 | * This is an old driver, for the 14F and 34F you should be using the |
| 13 | * u14-34f driver instead. |
| 14 | */ |
| 15 | |
| 16 | /* |
| 17 | * TODO: |
| 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. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * NOTES: |
| 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). |
| 38 | * |
| 39 | * The 14F, 24F, and 34F are supported by this driver. |
| 40 | * |
| 41 | * Places flagged with a triple question-mark are things which are either |
| 42 | * unfinished, questionable, or wrong. |
| 43 | */ |
| 44 | |
| 45 | /* Changes from version 1.11 alpha to 1.12 |
| 46 | * |
| 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. |
| 50 | * |
| 51 | * Caleb Epstein <cae@jpmorgan.com> |
| 52 | */ |
| 53 | |
| 54 | /* Changes from version 1.9 to 1.11 |
| 55 | * |
| 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. |
| 59 | * |
| 60 | * Fixes from Eric Youngdale to fix a few possible race conditions and |
| 61 | * several problems with bit testing operations (insufficient |
| 62 | * parentheses). |
| 63 | * |
| 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. |
| 68 | * |
| 69 | * Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts. |
| 70 | */ |
| 71 | |
| 72 | /* Changes from version 1.8 to version 1.9 |
| 73 | * |
| 74 | * 0.99.11 patches (cae@jpmorgan.com) */ |
| 75 | |
| 76 | /* Changes from version 1.7 to version 1.8 |
| 77 | * |
| 78 | * Better error reporting. |
| 79 | */ |
| 80 | |
| 81 | /* Changes from version 1.6 to version 1.7 |
| 82 | * |
| 83 | * Removed CSIR command code. |
| 84 | * |
| 85 | * Better race condition avoidance (xchgb function added). |
| 86 | * |
| 87 | * Set ICM and OGM status to zero at probe (24F) |
| 88 | * |
| 89 | * reset sends soft reset to UltraStor adapter |
| 90 | * |
| 91 | * reset adapter if adapter interrupts with an invalid MSCP address |
| 92 | * |
| 93 | * handle aborted command interrupt (24F) |
| 94 | * |
| 95 | */ |
| 96 | |
| 97 | /* Changes from version 1.5 to version 1.6: |
| 98 | * |
| 99 | * Read MSCP address from ICM _before_ clearing the interrupt flag. |
| 100 | * This fixes a race condition. |
| 101 | */ |
| 102 | |
| 103 | /* Changes from version 1.4 to version 1.5: |
| 104 | * |
| 105 | * Abort now calls done when multiple commands are enabled. |
| 106 | * |
| 107 | * Clear busy when aborted command finishes, not when abort is called. |
| 108 | * |
| 109 | * More debugging messages for aborts. |
| 110 | */ |
| 111 | |
| 112 | /* Changes from version 1.3 to version 1.4: |
| 113 | * |
| 114 | * Enable automatic request of sense data on error (requires newer version |
| 115 | * of scsi.c to be useful). |
| 116 | * |
| 117 | * Fix PORT_OVERRIDE for 14F. |
| 118 | * |
| 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 |
| 121 | * work). |
| 122 | * |
| 123 | * Boot time test to enable SCSI bus reset (defaults to not allowing reset). |
| 124 | * |
| 125 | * Fix test for OGM busy -- the busy bit is in different places on the 24F. |
| 126 | * |
| 127 | * Release ICM slot by clearing first byte on 24F. |
| 128 | */ |
| 129 | |
| 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 | |
| 142 | #include <asm/io.h> |
| 143 | #include <asm/system.h> |
| 144 | #include <asm/dma.h> |
| 145 | |
| 146 | #define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */ |
| 147 | #include "scsi.h" |
| 148 | #include <scsi/scsi_host.h> |
| 149 | #include "ultrastor.h" |
| 150 | |
| 151 | #define FALSE 0 |
| 152 | #define TRUE 1 |
| 153 | |
| 154 | #ifndef ULTRASTOR_DEBUG |
| 155 | #define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET) |
| 156 | #endif |
| 157 | |
| 158 | #define VERSION "1.12" |
| 159 | |
| 160 | #define PACKED __attribute__((packed)) |
| 161 | #define ALIGNED(x) __attribute__((aligned(x))) |
| 162 | |
| 163 | |
| 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 |
| 167 | packed structure. */ |
| 168 | |
| 169 | typedef struct { |
| 170 | u32 address; |
| 171 | u32 num_bytes; |
| 172 | } ultrastor_sg_list; |
| 173 | |
| 174 | |
| 175 | /* MailBox SCSI Command Packet. Basic command structure for communicating |
| 176 | with controller. */ |
| 177 | struct mscp { |
| 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. */ |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 199 | void (*done) (struct scsi_cmnd *); |
| 200 | struct scsi_cmnd *SCint; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | ultrastor_sg_list sglist[ULTRASTOR_24F_MAX_SG]; /* use larger size for 24F */ |
| 202 | }; |
| 203 | |
| 204 | |
| 205 | /* Port addresses (relative to the base address) */ |
| 206 | #define U14F_PRODUCT_ID(port) ((port) + 0x4) |
| 207 | #define CONFIG(port) ((port) + 0x6) |
| 208 | |
| 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) |
| 214 | |
| 215 | |
| 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. |
| 218 | |
| 219 | This structure also holds port addresses that are not at the same offset |
| 220 | on the 14F and 24F. |
| 221 | |
| 222 | This structure holds all data that must be duplicated to support multiple |
| 223 | adapters. */ |
| 224 | |
| 225 | static struct ultrastor_config |
| 226 | { |
| 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; |
| 235 | unsigned char heads; |
| 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). */ |
| 242 | unsigned char slot; |
| 243 | |
| 244 | #ifdef PRINT_U24F_VERSION |
| 245 | volatile int csir_done; |
| 246 | #endif |
| 247 | |
| 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.) */ |
| 251 | |
| 252 | #if ULTRASTOR_MAX_CMDS == 1 |
| 253 | unsigned char mscp_busy; |
| 254 | #else |
| 255 | unsigned long mscp_free; |
| 256 | #endif |
| 257 | volatile unsigned char aborted[ULTRASTOR_MAX_CMDS]; |
| 258 | struct mscp mscp[ULTRASTOR_MAX_CMDS]; |
| 259 | } config = {0}; |
| 260 | |
| 261 | /* Set this to 1 to reset the SCSI bus on error. */ |
| 262 | static int ultrastor_bus_reset; |
| 263 | |
| 264 | |
| 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, |
| 269 | }; |
| 270 | |
| 271 | /* Allowed IRQs for 14f */ |
| 272 | static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 }; |
| 273 | |
| 274 | /* Allowed DMA channels for 14f (0 indicates reserved) */ |
| 275 | static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 }; |
| 276 | |
| 277 | /* Head/sector mappings allowed by 14f */ |
| 278 | static const struct { |
| 279 | unsigned char heads; |
| 280 | unsigned char sectors; |
| 281 | } mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } }; |
| 282 | |
| 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, |
| 287 | }; |
| 288 | #endif |
| 289 | |
| 290 | static void ultrastor_interrupt(int, void *, struct pt_regs *); |
| 291 | static irqreturn_t do_ultrastor_interrupt(int, void *, struct pt_regs *); |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 292 | static inline void build_sg_list(struct mscp *, struct scsi_cmnd *SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | |
| 295 | /* Always called with host lock held */ |
| 296 | |
| 297 | static inline int find_and_clear_bit_16(unsigned long *field) |
| 298 | { |
| 299 | int rv; |
| 300 | |
| 301 | if (*field == 0) panic("No free mscp"); |
| 302 | asm("xorl %0,%0\n0:\tbsfw %1,%w0\n\tbtr %0,%1\n\tjnc 0b" |
| 303 | : "=&r" (rv), "=m" (*field) : "1" (*field)); |
| 304 | return rv; |
| 305 | } |
| 306 | |
| 307 | /* This has been re-implemented with the help of Richard Earnshaw, |
| 308 | <rwe@pegasus.esprit.ec.org> and works with gcc-2.5.8 and gcc-2.6.0. |
| 309 | The instability noted by jfc below appears to be a bug in |
| 310 | gcc-2.5.x when compiling w/o optimization. --Caleb |
| 311 | |
| 312 | This asm is fragile: it doesn't work without the casts and it may |
| 313 | not work without optimization. Maybe I should add a swap builtin |
| 314 | to gcc. --jfc */ |
| 315 | static inline unsigned char xchgb(unsigned char reg, |
| 316 | volatile unsigned char *mem) |
| 317 | { |
| 318 | __asm__ ("xchgb %0,%1" : "=q" (reg), "=m" (*mem) : "0" (reg)); |
| 319 | return reg; |
| 320 | } |
| 321 | |
| 322 | #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT) |
| 323 | |
| 324 | /* Always called with the host lock held */ |
| 325 | static void log_ultrastor_abort(struct ultrastor_config *config, |
| 326 | int command) |
| 327 | { |
| 328 | static char fmt[80] = "abort %d (%x); MSCP free pool: %x;"; |
| 329 | int i; |
| 330 | |
| 331 | for (i = 0; i < ULTRASTOR_MAX_CMDS; i++) |
| 332 | { |
| 333 | fmt[20 + i*2] = ' '; |
| 334 | if (! (config->mscp_free & (1 << i))) |
| 335 | fmt[21 + i*2] = '0' + config->mscp[i].target_id; |
| 336 | else |
| 337 | fmt[21 + i*2] = '-'; |
| 338 | } |
| 339 | fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n'; |
| 340 | fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0; |
| 341 | printk(fmt, command, &config->mscp[command], config->mscp_free); |
| 342 | |
| 343 | } |
| 344 | #endif |
| 345 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 346 | static int ultrastor_14f_detect(struct scsi_host_template * tpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | size_t i; |
| 349 | unsigned char in_byte, version_byte = 0; |
| 350 | struct config_1 { |
| 351 | unsigned char bios_segment: 3; |
| 352 | unsigned char removable_disks_as_fixed: 1; |
| 353 | unsigned char interrupt: 2; |
| 354 | unsigned char dma_channel: 2; |
| 355 | } config_1; |
| 356 | struct config_2 { |
| 357 | unsigned char ha_scsi_id: 3; |
| 358 | unsigned char mapping_mode: 2; |
| 359 | unsigned char bios_drive_number: 1; |
| 360 | unsigned char tfr_port: 2; |
| 361 | } config_2; |
| 362 | |
| 363 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 364 | printk("US14F: detect: called\n"); |
| 365 | #endif |
| 366 | |
| 367 | /* If a 24F has already been configured, don't look for a 14F. */ |
| 368 | if (config.bios_segment) |
| 369 | return FALSE; |
| 370 | |
| 371 | #ifdef PORT_OVERRIDE |
| 372 | if(!request_region(PORT_OVERRIDE, 0xc, "ultrastor")) { |
| 373 | printk("Ultrastor I/O space already in use\n"); |
| 374 | return FALSE; |
| 375 | }; |
| 376 | config.port_address = PORT_OVERRIDE; |
| 377 | #else |
| 378 | for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) { |
| 379 | if(!request_region(ultrastor_ports_14f[i], 0x0c, "ultrastor")) continue; |
| 380 | config.port_address = ultrastor_ports_14f[i]; |
| 381 | #endif |
| 382 | |
| 383 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 384 | printk("US14F: detect: testing port address %03X\n", config.port_address); |
| 385 | #endif |
| 386 | |
| 387 | in_byte = inb(U14F_PRODUCT_ID(config.port_address)); |
| 388 | if (in_byte != US14F_PRODUCT_ID_0) { |
| 389 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 390 | # ifdef PORT_OVERRIDE |
| 391 | printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte); |
| 392 | # else |
| 393 | printk("US14F: detect: no adapter at port %03X\n", config.port_address); |
| 394 | # endif |
| 395 | #endif |
| 396 | #ifdef PORT_OVERRIDE |
| 397 | goto out_release_port; |
| 398 | #else |
| 399 | release_region(config.port_address, 0x0c); |
| 400 | continue; |
| 401 | #endif |
| 402 | } |
| 403 | in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1); |
| 404 | /* Only upper nibble is significant for Product ID 1 */ |
| 405 | if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) { |
| 406 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 407 | # ifdef PORT_OVERRIDE |
| 408 | printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte); |
| 409 | # else |
| 410 | printk("US14F: detect: no adapter at port %03X\n", config.port_address); |
| 411 | # endif |
| 412 | #endif |
| 413 | #ifdef PORT_OVERRIDE |
| 414 | goto out_release_port; |
| 415 | #else |
| 416 | release_region(config.port_address, 0x0c); |
| 417 | continue; |
| 418 | #endif |
| 419 | } |
| 420 | version_byte = in_byte; |
| 421 | #ifndef PORT_OVERRIDE |
| 422 | break; |
| 423 | } |
| 424 | if (i == ARRAY_SIZE(ultrastor_ports_14f)) { |
| 425 | # if (ULTRASTOR_DEBUG & UD_DETECT) |
| 426 | printk("US14F: detect: no port address found!\n"); |
| 427 | # endif |
| 428 | /* all ports probed already released - we can just go straight out */ |
| 429 | return FALSE; |
| 430 | } |
| 431 | #endif |
| 432 | |
| 433 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 434 | printk("US14F: detect: adapter found at port address %03X\n", |
| 435 | config.port_address); |
| 436 | #endif |
| 437 | |
| 438 | /* Set local doorbell mask to disallow bus reset unless |
| 439 | ultrastor_bus_reset is true. */ |
| 440 | outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address)); |
| 441 | |
| 442 | /* All above tests passed, must be the right thing. Get some useful |
| 443 | info. */ |
| 444 | |
| 445 | /* Register the I/O space that we use */ |
| 446 | |
| 447 | *(char *)&config_1 = inb(CONFIG(config.port_address + 0)); |
| 448 | *(char *)&config_2 = inb(CONFIG(config.port_address + 1)); |
| 449 | config.bios_segment = bios_segment_table[config_1.bios_segment]; |
| 450 | config.doorbell_address = config.port_address; |
| 451 | config.ogm_address = config.port_address + 0x8; |
| 452 | config.icm_address = config.port_address + 0xC; |
| 453 | config.interrupt = interrupt_table_14f[config_1.interrupt]; |
| 454 | config.ha_scsi_id = config_2.ha_scsi_id; |
| 455 | config.heads = mapping_table[config_2.mapping_mode].heads; |
| 456 | config.sectors = mapping_table[config_2.mapping_mode].sectors; |
| 457 | config.bios_drive_number = config_2.bios_drive_number; |
| 458 | config.subversion = (version_byte & 0x0F); |
| 459 | if (config.subversion == U34F) |
| 460 | config.dma_channel = 0; |
| 461 | else |
| 462 | config.dma_channel = dma_channel_table_14f[config_1.dma_channel]; |
| 463 | |
| 464 | if (!config.bios_segment) { |
| 465 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 466 | printk("US14F: detect: not detected.\n"); |
| 467 | #endif |
| 468 | goto out_release_port; |
| 469 | } |
| 470 | |
| 471 | /* Final consistency check, verify previous info. */ |
| 472 | if (config.subversion != U34F) |
| 473 | if (!config.dma_channel || !(config_2.tfr_port & 0x2)) { |
| 474 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 475 | printk("US14F: detect: consistency check failed\n"); |
| 476 | #endif |
| 477 | goto out_release_port; |
| 478 | } |
| 479 | |
| 480 | /* If we were TRULY paranoid, we could issue a host adapter inquiry |
| 481 | command here and verify the data returned. But frankly, I'm |
| 482 | exhausted! */ |
| 483 | |
| 484 | /* Finally! Now I'm satisfied... */ |
| 485 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 486 | printk("US14F: detect: detect succeeded\n" |
| 487 | " Port address: %03X\n" |
| 488 | " BIOS segment: %05X\n" |
| 489 | " Interrupt: %u\n" |
| 490 | " DMA channel: %u\n" |
| 491 | " H/A SCSI ID: %u\n" |
| 492 | " Subversion: %u\n", |
| 493 | config.port_address, config.bios_segment, config.interrupt, |
| 494 | config.dma_channel, config.ha_scsi_id, config.subversion); |
| 495 | #endif |
| 496 | tpnt->this_id = config.ha_scsi_id; |
| 497 | tpnt->unchecked_isa_dma = (config.subversion != U34F); |
| 498 | |
| 499 | #if ULTRASTOR_MAX_CMDS > 1 |
| 500 | config.mscp_free = ~0; |
| 501 | #endif |
| 502 | |
| 503 | /* |
| 504 | * Brrr, &config.mscp[0].SCint->host) it is something magical.... |
| 505 | * XXX and FIXME |
| 506 | */ |
| 507 | if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", &config.mscp[0].SCint->device->host)) { |
| 508 | printk("Unable to allocate IRQ%u for UltraStor controller.\n", |
| 509 | config.interrupt); |
| 510 | goto out_release_port; |
| 511 | } |
| 512 | if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) { |
| 513 | printk("Unable to allocate DMA channel %u for UltraStor controller.\n", |
| 514 | config.dma_channel); |
| 515 | free_irq(config.interrupt, NULL); |
| 516 | goto out_release_port; |
| 517 | } |
| 518 | tpnt->sg_tablesize = ULTRASTOR_14F_MAX_SG; |
| 519 | printk("UltraStor driver version" VERSION ". Using %d SG lists.\n", |
| 520 | ULTRASTOR_14F_MAX_SG); |
| 521 | |
| 522 | return TRUE; |
| 523 | out_release_port: |
| 524 | release_region(config.port_address, 0x0c); |
| 525 | return FALSE; |
| 526 | } |
| 527 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 528 | static int ultrastor_24f_detect(struct scsi_host_template * tpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
| 530 | 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 | |
| 581 | /* BIOS addr set */ |
| 582 | /* base port set */ |
| 583 | config.port_address = addr; |
| 584 | config.doorbell_address = addr + 12; |
| 585 | config.ogm_address = addr + 0x17; |
| 586 | config.icm_address = addr + 0x1C; |
| 587 | config_2 = inb(addr + 7); |
| 588 | config.ha_scsi_id = config_2 & 7; |
| 589 | config.heads = mapping_table[(config_2 >> 3) & 3].heads; |
| 590 | config.sectors = mapping_table[(config_2 >> 3) & 3].sectors; |
| 591 | #if (ULTRASTOR_DEBUG & UD_DETECT) |
| 592 | printk("US24F: detect: detect succeeded\n" |
| 593 | " Port address: %03X\n" |
| 594 | " BIOS segment: %05X\n" |
| 595 | " Interrupt: %u\n" |
| 596 | " H/A SCSI ID: %u\n", |
| 597 | config.port_address, config.bios_segment, |
| 598 | config.interrupt, config.ha_scsi_id); |
| 599 | #endif |
| 600 | tpnt->this_id = config.ha_scsi_id; |
| 601 | tpnt->unchecked_isa_dma = 0; |
| 602 | tpnt->sg_tablesize = ULTRASTOR_24F_MAX_SG; |
| 603 | |
| 604 | shpnt = scsi_register(tpnt, 0); |
| 605 | if (!shpnt) { |
| 606 | printk(KERN_WARNING "(ultrastor:) Could not register scsi device. Aborting registration.\n"); |
| 607 | free_irq(config.interrupt, do_ultrastor_interrupt); |
| 608 | return FALSE; |
| 609 | } |
| 610 | |
| 611 | if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", shpnt)) |
| 612 | { |
| 613 | printk("Unable to allocate IRQ%u for UltraStor controller.\n", |
| 614 | config.interrupt); |
| 615 | return FALSE; |
| 616 | } |
| 617 | |
| 618 | shpnt->irq = config.interrupt; |
| 619 | shpnt->dma_channel = config.dma_channel; |
| 620 | shpnt->io_port = config.port_address; |
| 621 | |
| 622 | #if ULTRASTOR_MAX_CMDS > 1 |
| 623 | config.mscp_free = ~0; |
| 624 | #endif |
| 625 | /* Mark ICM and OGM free */ |
| 626 | outb(0, addr + 0x16); |
| 627 | outb(0, addr + 0x1B); |
| 628 | |
| 629 | /* Set local doorbell mask to disallow bus reset unless |
| 630 | ultrastor_bus_reset is true. */ |
| 631 | outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12)); |
| 632 | outb(0x02, SYS_DOORBELL_MASK(addr+12)); |
| 633 | printk("UltraStor driver version " VERSION ". Using %d SG lists.\n", |
| 634 | tpnt->sg_tablesize); |
| 635 | return TRUE; |
| 636 | } |
| 637 | return FALSE; |
| 638 | } |
| 639 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 640 | static int ultrastor_detect(struct scsi_host_template * tpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | { |
| 642 | tpnt->proc_name = "ultrastor"; |
| 643 | return ultrastor_14f_detect(tpnt) || ultrastor_24f_detect(tpnt); |
| 644 | } |
| 645 | |
| 646 | static int ultrastor_release(struct Scsi_Host *shost) |
| 647 | { |
| 648 | if (shost->irq) |
| 649 | free_irq(shost->irq, NULL); |
| 650 | if (shost->dma_channel != 0xff) |
| 651 | free_dma(shost->dma_channel); |
| 652 | if (shost->io_port && shost->n_io_port) |
| 653 | release_region(shost->io_port, shost->n_io_port); |
| 654 | scsi_unregister(shost); |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | static const char *ultrastor_info(struct Scsi_Host * shpnt) |
| 659 | { |
| 660 | static char buf[64]; |
| 661 | |
| 662 | if (config.slot) |
| 663 | sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u", |
| 664 | config.slot, config.interrupt); |
| 665 | else if (config.subversion) |
| 666 | sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u", |
| 667 | config.port_address, (int)config.bios_segment, |
| 668 | config.interrupt); |
| 669 | else |
| 670 | sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u", |
| 671 | config.port_address, (int)config.bios_segment, |
| 672 | config.interrupt, config.dma_channel); |
| 673 | return buf; |
| 674 | } |
| 675 | |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 676 | static inline void build_sg_list(struct mscp *mscp, struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | { |
| 678 | struct scatterlist *sl; |
| 679 | long transfer_length = 0; |
| 680 | int i, max; |
| 681 | |
| 682 | sl = (struct scatterlist *) SCpnt->request_buffer; |
| 683 | max = SCpnt->use_sg; |
| 684 | for (i = 0; i < max; i++) { |
| 685 | mscp->sglist[i].address = isa_page_to_bus(sl[i].page) + sl[i].offset; |
| 686 | mscp->sglist[i].num_bytes = sl[i].length; |
| 687 | transfer_length += sl[i].length; |
| 688 | } |
| 689 | mscp->number_of_sg_list = max; |
| 690 | mscp->transfer_data = isa_virt_to_bus(mscp->sglist); |
| 691 | /* ??? May not be necessary. Docs are unclear as to whether transfer |
| 692 | length field is ignored or whether it should be set to the total |
| 693 | number of bytes of the transfer. */ |
| 694 | mscp->transfer_data_length = transfer_length; |
| 695 | } |
| 696 | |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 697 | static int ultrastor_queuecommand(struct scsi_cmnd *SCpnt, |
| 698 | void (*done) (struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | { |
| 700 | struct mscp *my_mscp; |
| 701 | #if ULTRASTOR_MAX_CMDS > 1 |
| 702 | int mscp_index; |
| 703 | #endif |
| 704 | unsigned int status; |
| 705 | |
| 706 | /* Next test is for debugging; "can't happen" */ |
| 707 | if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0) |
| 708 | panic("ultrastor_queuecommand: no free MSCP\n"); |
| 709 | mscp_index = find_and_clear_bit_16(&config.mscp_free); |
| 710 | |
| 711 | /* Has the command been aborted? */ |
| 712 | if (xchgb(0xff, &config.aborted[mscp_index]) != 0) |
| 713 | { |
| 714 | status = DID_ABORT << 16; |
| 715 | goto aborted; |
| 716 | } |
| 717 | |
| 718 | my_mscp = &config.mscp[mscp_index]; |
| 719 | |
| 720 | *(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3); |
| 721 | |
| 722 | /* Tape drives don't work properly if the cache is used. The SCSI |
| 723 | READ command for a tape doesn't have a block offset, and the adapter |
| 724 | incorrectly assumes that all reads from the tape read the same |
| 725 | blocks. Results will depend on read buffer size and other disk |
| 726 | activity. |
| 727 | |
| 728 | ??? Which other device types should never use the cache? */ |
| 729 | my_mscp->ca = SCpnt->device->type != TYPE_TAPE; |
| 730 | my_mscp->target_id = SCpnt->device->id; |
| 731 | my_mscp->ch_no = 0; |
| 732 | my_mscp->lun = SCpnt->device->lun; |
| 733 | if (SCpnt->use_sg) { |
| 734 | /* Set scatter/gather flag in SCSI command packet */ |
| 735 | my_mscp->sg = TRUE; |
| 736 | build_sg_list(my_mscp, SCpnt); |
| 737 | } else { |
| 738 | /* Unset scatter/gather flag in SCSI command packet */ |
| 739 | my_mscp->sg = FALSE; |
| 740 | my_mscp->transfer_data = isa_virt_to_bus(SCpnt->request_buffer); |
| 741 | my_mscp->transfer_data_length = SCpnt->request_bufflen; |
| 742 | } |
| 743 | my_mscp->command_link = 0; /*???*/ |
| 744 | my_mscp->scsi_command_link_id = 0; /*???*/ |
| 745 | my_mscp->length_of_sense_byte = sizeof SCpnt->sense_buffer; |
| 746 | my_mscp->length_of_scsi_cdbs = SCpnt->cmd_len; |
| 747 | memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs); |
| 748 | my_mscp->adapter_status = 0; |
| 749 | my_mscp->target_status = 0; |
| 750 | my_mscp->sense_data = isa_virt_to_bus(&SCpnt->sense_buffer); |
| 751 | my_mscp->done = done; |
| 752 | my_mscp->SCint = SCpnt; |
| 753 | SCpnt->host_scribble = (unsigned char *)my_mscp; |
| 754 | |
| 755 | /* Find free OGM slot. On 24F, look for OGM status byte == 0. |
| 756 | On 14F and 34F, wait for local interrupt pending flag to clear. |
| 757 | |
| 758 | FIXME: now we are using new_eh we should punt here and let the |
| 759 | midlayer sort it out */ |
| 760 | |
| 761 | retry: |
| 762 | if (config.slot) |
| 763 | while (inb(config.ogm_address - 1) != 0 && config.aborted[mscp_index] == 0xff) |
| 764 | barrier(); |
| 765 | |
| 766 | /* else??? */ |
| 767 | |
| 768 | while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) && config.aborted[mscp_index] == 0xff) |
| 769 | barrier(); |
| 770 | |
| 771 | /* To avoid race conditions, keep the code to write to the adapter |
| 772 | atomic. This simplifies the abort code. Right now the |
| 773 | scsi mid layer has the host_lock already held |
| 774 | */ |
| 775 | |
| 776 | if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) |
| 777 | goto retry; |
| 778 | |
| 779 | status = xchgb(0, &config.aborted[mscp_index]); |
| 780 | if (status != 0xff) { |
| 781 | |
| 782 | #if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT) |
| 783 | printk("USx4F: queuecommand: aborted\n"); |
| 784 | #if ULTRASTOR_MAX_CMDS > 1 |
| 785 | log_ultrastor_abort(&config, mscp_index); |
| 786 | #endif |
| 787 | #endif |
| 788 | status <<= 16; |
| 789 | |
| 790 | aborted: |
| 791 | set_bit(mscp_index, &config.mscp_free); |
| 792 | /* If the driver queues commands, call the done proc here. Otherwise |
| 793 | return an error. */ |
| 794 | #if ULTRASTOR_MAX_CMDS > 1 |
| 795 | SCpnt->result = status; |
| 796 | done(SCpnt); |
| 797 | return 0; |
| 798 | #else |
| 799 | return status; |
| 800 | #endif |
| 801 | } |
| 802 | |
| 803 | /* Store pointer in OGM address bytes */ |
| 804 | outl(isa_virt_to_bus(my_mscp), config.ogm_address); |
| 805 | |
| 806 | /* Issue OGM interrupt */ |
| 807 | if (config.slot) { |
| 808 | /* Write OGM command register on 24F */ |
| 809 | outb(1, config.ogm_address - 1); |
| 810 | outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address)); |
| 811 | } else { |
| 812 | outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address)); |
| 813 | } |
| 814 | |
| 815 | #if (ULTRASTOR_DEBUG & UD_COMMAND) |
| 816 | printk("USx4F: queuecommand: returning\n"); |
| 817 | #endif |
| 818 | |
| 819 | return 0; |
| 820 | } |
| 821 | |
| 822 | /* This code must deal with 2 cases: |
| 823 | |
| 824 | 1. The command has not been written to the OGM. In this case, set |
| 825 | the abort flag and return. |
| 826 | |
| 827 | 2. The command has been written to the OGM and is stuck somewhere in |
| 828 | the adapter. |
| 829 | |
| 830 | 2a. On a 24F, ask the adapter to abort the command. It will interrupt |
| 831 | when it does. |
| 832 | |
| 833 | 2b. Call the command's done procedure. |
| 834 | |
| 835 | */ |
| 836 | |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 837 | static int ultrastor_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | { |
| 839 | #if ULTRASTOR_DEBUG & UD_ABORT |
| 840 | char out[108]; |
| 841 | unsigned char icm_status = 0, ogm_status = 0; |
| 842 | unsigned int icm_addr = 0, ogm_addr = 0; |
| 843 | #endif |
| 844 | unsigned int mscp_index; |
| 845 | unsigned char old_aborted; |
| 846 | unsigned long flags; |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 847 | void (*done)(struct scsi_cmnd *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | struct Scsi_Host *host = SCpnt->device->host; |
| 849 | |
| 850 | if(config.slot) |
| 851 | return FAILED; /* Do not attempt an abort for the 24f */ |
| 852 | |
| 853 | /* Simple consistency checking */ |
| 854 | if(!SCpnt->host_scribble) |
| 855 | return FAILED; |
| 856 | |
| 857 | mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp; |
| 858 | if (mscp_index >= ULTRASTOR_MAX_CMDS) |
| 859 | panic("Ux4F aborting invalid MSCP"); |
| 860 | |
| 861 | #if ULTRASTOR_DEBUG & UD_ABORT |
| 862 | if (config.slot) |
| 863 | { |
| 864 | int port0 = (config.slot << 12) | 0xc80; |
| 865 | int i; |
| 866 | unsigned long flags; |
| 867 | |
| 868 | spin_lock_irqsave(host->host_lock, flags); |
| 869 | strcpy(out, "OGM %d:%x ICM %d:%x ports: "); |
| 870 | for (i = 0; i < 16; i++) |
| 871 | { |
| 872 | unsigned char p = inb(port0 + i); |
| 873 | out[28 + i * 3] = "0123456789abcdef"[p >> 4]; |
| 874 | out[29 + i * 3] = "0123456789abcdef"[p & 15]; |
| 875 | out[30 + i * 3] = ' '; |
| 876 | } |
| 877 | out[28 + i * 3] = '\n'; |
| 878 | out[29 + i * 3] = 0; |
| 879 | ogm_status = inb(port0 + 22); |
| 880 | ogm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 23)); |
| 881 | icm_status = inb(port0 + 27); |
| 882 | icm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 28)); |
Jeff Garzik | 8fa728a | 2005-05-28 07:54:40 -0400 | [diff] [blame] | 883 | spin_unlock_irqrestore(host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
| 885 | |
| 886 | /* First check to see if an interrupt is pending. I suspect the SiS |
| 887 | chipset loses interrupts. (I also suspect is mangles data, but |
| 888 | one bug at a time... */ |
| 889 | if (config.slot ? inb(config.icm_address - 1) == 2 : |
| 890 | (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1)) |
| 891 | { |
| 892 | printk("Ux4F: abort while completed command pending\n"); |
| 893 | |
| 894 | spin_lock_irqsave(host->host_lock, flags); |
| 895 | /* FIXME: Ewww... need to think about passing host around properly */ |
| 896 | ultrastor_interrupt(0, NULL, NULL); |
| 897 | spin_unlock_irqrestore(host->host_lock, flags); |
| 898 | return SUCCESS; |
| 899 | } |
| 900 | #endif |
| 901 | |
| 902 | old_aborted = xchgb(DID_ABORT, &config.aborted[mscp_index]); |
| 903 | |
| 904 | /* aborted == 0xff is the signal that queuecommand has not yet sent |
| 905 | the command. It will notice the new abort flag and fail. */ |
| 906 | if (old_aborted == 0xff) |
| 907 | return SUCCESS; |
| 908 | |
| 909 | /* On 24F, send an abort MSCP request. The adapter will interrupt |
| 910 | and the interrupt handler will call done. */ |
| 911 | if (config.slot && inb(config.ogm_address - 1) == 0) |
| 912 | { |
| 913 | unsigned long flags; |
| 914 | |
| 915 | spin_lock_irqsave(host->host_lock, flags); |
| 916 | outl(isa_virt_to_bus(&config.mscp[mscp_index]), config.ogm_address); |
| 917 | udelay(8); |
| 918 | outb(0x80, config.ogm_address - 1); |
| 919 | outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address)); |
| 920 | #if ULTRASTOR_DEBUG & UD_ABORT |
| 921 | log_ultrastor_abort(&config, mscp_index); |
| 922 | printk(out, ogm_status, ogm_addr, icm_status, icm_addr); |
| 923 | #endif |
| 924 | spin_unlock_irqrestore(host->host_lock, flags); |
| 925 | /* FIXME: add a wait for the abort to complete */ |
| 926 | return SUCCESS; |
| 927 | } |
| 928 | |
| 929 | #if ULTRASTOR_DEBUG & UD_ABORT |
| 930 | log_ultrastor_abort(&config, mscp_index); |
| 931 | #endif |
| 932 | |
| 933 | /* Can't request a graceful abort. Either this is not a 24F or |
| 934 | the OGM is busy. Don't free the command -- the adapter might |
| 935 | still be using it. Setting SCint = 0 causes the interrupt |
| 936 | handler to ignore the command. */ |
| 937 | |
| 938 | /* FIXME - devices that implement soft resets will still be running |
| 939 | the command after a bus reset. We would probably rather leave |
| 940 | the command in the queue. The upper level code will automatically |
| 941 | leave the command in the active state instead of requeueing it. ERY */ |
| 942 | |
| 943 | #if ULTRASTOR_DEBUG & UD_ABORT |
| 944 | if (config.mscp[mscp_index].SCint != SCpnt) |
| 945 | printk("abort: command mismatch, %p != %p\n", |
| 946 | config.mscp[mscp_index].SCint, SCpnt); |
| 947 | #endif |
| 948 | if (config.mscp[mscp_index].SCint == 0) |
akpm@osdl.org | 69aa3f7 | 2005-05-01 08:58:35 -0700 | [diff] [blame] | 949 | return FAILED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
| 951 | if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort"); |
| 952 | config.mscp[mscp_index].SCint = NULL; |
| 953 | done = config.mscp[mscp_index].done; |
| 954 | config.mscp[mscp_index].done = NULL; |
| 955 | SCpnt->result = DID_ABORT << 16; |
| 956 | |
| 957 | /* Take the host lock to guard against scsi layer re-entry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
| 960 | /* Need to set a timeout here in case command never completes. */ |
| 961 | return SUCCESS; |
| 962 | } |
| 963 | |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 964 | static int ultrastor_host_reset(struct scsi_cmnd * SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | { |
| 966 | unsigned long flags; |
| 967 | int i; |
| 968 | struct Scsi_Host *host = SCpnt->device->host; |
| 969 | |
| 970 | #if (ULTRASTOR_DEBUG & UD_RESET) |
| 971 | printk("US14F: reset: called\n"); |
| 972 | #endif |
| 973 | |
| 974 | if(config.slot) |
| 975 | return FAILED; |
| 976 | |
| 977 | spin_lock_irqsave(host->host_lock, flags); |
| 978 | /* Reset the adapter and SCSI bus. The SCSI bus reset can be |
| 979 | inhibited by clearing ultrastor_bus_reset before probe. */ |
| 980 | outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address)); |
| 981 | if (config.slot) |
| 982 | { |
| 983 | outb(0, config.ogm_address - 1); |
| 984 | outb(0, config.icm_address - 1); |
| 985 | } |
| 986 | |
| 987 | #if ULTRASTOR_MAX_CMDS == 1 |
| 988 | if (config.mscp_busy && config.mscp->done && config.mscp->SCint) |
| 989 | { |
| 990 | config.mscp->SCint->result = DID_RESET << 16; |
| 991 | config.mscp->done(config.mscp->SCint); |
| 992 | } |
| 993 | config.mscp->SCint = 0; |
| 994 | #else |
| 995 | for (i = 0; i < ULTRASTOR_MAX_CMDS; i++) |
| 996 | { |
| 997 | if (! (config.mscp_free & (1 << i)) && |
| 998 | config.mscp[i].done && config.mscp[i].SCint) |
| 999 | { |
| 1000 | config.mscp[i].SCint->result = DID_RESET << 16; |
| 1001 | config.mscp[i].done(config.mscp[i].SCint); |
| 1002 | config.mscp[i].done = NULL; |
| 1003 | } |
| 1004 | config.mscp[i].SCint = NULL; |
| 1005 | } |
| 1006 | #endif |
| 1007 | |
| 1008 | /* FIXME - if the device implements soft resets, then the command |
| 1009 | will still be running. ERY |
| 1010 | |
| 1011 | Even bigger deal with new_eh! |
| 1012 | */ |
| 1013 | |
| 1014 | memset((unsigned char *)config.aborted, 0, sizeof config.aborted); |
| 1015 | #if ULTRASTOR_MAX_CMDS == 1 |
| 1016 | config.mscp_busy = 0; |
| 1017 | #else |
| 1018 | config.mscp_free = ~0; |
| 1019 | #endif |
| 1020 | |
| 1021 | spin_unlock_irqrestore(host->host_lock, flags); |
| 2bc474c | 2005-04-10 22:19:25 -0500 | [diff] [blame] | 1022 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
| 1024 | } |
| 1025 | |
| 1026 | int ultrastor_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
| 1027 | sector_t capacity, int * dkinfo) |
| 1028 | { |
| 1029 | int size = capacity; |
| 1030 | unsigned int s = config.heads * config.sectors; |
| 1031 | |
| 1032 | dkinfo[0] = config.heads; |
| 1033 | dkinfo[1] = config.sectors; |
| 1034 | dkinfo[2] = size / s; /* Ignore partial cylinders */ |
| 1035 | #if 0 |
| 1036 | if (dkinfo[2] > 1024) |
| 1037 | dkinfo[2] = 1024; |
| 1038 | #endif |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | static void ultrastor_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 1043 | { |
| 1044 | unsigned int status; |
| 1045 | #if ULTRASTOR_MAX_CMDS > 1 |
| 1046 | unsigned int mscp_index; |
| 1047 | #endif |
| 1048 | struct mscp *mscp; |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 1049 | void (*done) (struct scsi_cmnd *); |
| 1050 | struct scsi_cmnd *SCtmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
| 1052 | #if ULTRASTOR_MAX_CMDS == 1 |
| 1053 | mscp = &config.mscp[0]; |
| 1054 | #else |
| 1055 | mscp = (struct mscp *)isa_bus_to_virt(inl(config.icm_address)); |
| 1056 | mscp_index = mscp - config.mscp; |
| 1057 | if (mscp_index >= ULTRASTOR_MAX_CMDS) { |
| 1058 | printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp); |
| 1059 | /* A command has been lost. Reset and report an error |
| 1060 | for all commands. */ |
| 1061 | ultrastor_host_reset(dev_id); |
| 1062 | return; |
| 1063 | } |
| 1064 | #endif |
| 1065 | |
| 1066 | /* Clean ICM slot (set ICMINT bit to 0) */ |
| 1067 | if (config.slot) { |
| 1068 | unsigned char icm_status = inb(config.icm_address - 1); |
| 1069 | #if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT) |
| 1070 | if (icm_status != 1 && icm_status != 2) |
| 1071 | printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status, |
| 1072 | mscp_index, (unsigned int) mscp); |
| 1073 | #endif |
| 1074 | /* The manual says clear interrupt then write 0 to ICM status. |
| 1075 | This seems backwards, but I'll do it anyway. --jfc */ |
| 1076 | outb(2, SYS_DOORBELL_INTR(config.doorbell_address)); |
| 1077 | outb(0, config.icm_address - 1); |
| 1078 | if (icm_status == 4) { |
| 1079 | printk("UltraStor abort command failed\n"); |
| 1080 | return; |
| 1081 | } |
| 1082 | if (icm_status == 3) { |
Henrik Kretzschmar | b462023 | 2006-09-06 10:49:48 +0200 | [diff] [blame] | 1083 | void (*done)(struct scsi_cmnd *) = mscp->done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | if (done) { |
| 1085 | mscp->done = NULL; |
| 1086 | mscp->SCint->result = DID_ABORT << 16; |
| 1087 | done(mscp->SCint); |
| 1088 | } |
| 1089 | return; |
| 1090 | } |
| 1091 | } else { |
| 1092 | outb(1, SYS_DOORBELL_INTR(config.doorbell_address)); |
| 1093 | } |
| 1094 | |
| 1095 | SCtmp = mscp->SCint; |
| 1096 | mscp->SCint = NULL; |
| 1097 | |
| 1098 | if (SCtmp == 0) |
| 1099 | { |
| 1100 | #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT) |
| 1101 | printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp); |
| 1102 | #endif |
| 1103 | #if ULTRASTOR_MAX_CMDS == 1 |
| 1104 | config.mscp_busy = FALSE; |
| 1105 | #else |
| 1106 | set_bit(mscp_index, &config.mscp_free); |
| 1107 | #endif |
| 1108 | config.aborted[mscp_index] = 0; |
| 1109 | return; |
| 1110 | } |
| 1111 | |
| 1112 | /* Save done locally and zero before calling. This is needed as |
| 1113 | once we call done, we may get another command queued before this |
| 1114 | interrupt service routine can return. */ |
| 1115 | done = mscp->done; |
| 1116 | mscp->done = NULL; |
| 1117 | |
| 1118 | /* Let the higher levels know that we're done */ |
| 1119 | switch (mscp->adapter_status) |
| 1120 | { |
| 1121 | case 0: |
| 1122 | status = DID_OK << 16; |
| 1123 | break; |
| 1124 | case 0x01: /* invalid command */ |
| 1125 | case 0x02: /* invalid parameters */ |
| 1126 | case 0x03: /* invalid data list */ |
| 1127 | default: |
| 1128 | status = DID_ERROR << 16; |
| 1129 | break; |
| 1130 | case 0x84: /* SCSI bus abort */ |
| 1131 | status = DID_ABORT << 16; |
| 1132 | break; |
| 1133 | case 0x91: |
| 1134 | status = DID_TIME_OUT << 16; |
| 1135 | break; |
| 1136 | } |
| 1137 | |
| 1138 | SCtmp->result = status | mscp->target_status; |
| 1139 | |
| 1140 | SCtmp->host_scribble = NULL; |
| 1141 | |
| 1142 | /* Free up mscp block for next command */ |
| 1143 | #if ULTRASTOR_MAX_CMDS == 1 |
| 1144 | config.mscp_busy = FALSE; |
| 1145 | #else |
| 1146 | set_bit(mscp_index, &config.mscp_free); |
| 1147 | #endif |
| 1148 | |
| 1149 | #if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT) |
| 1150 | if (config.aborted[mscp_index]) |
| 1151 | printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n", |
| 1152 | mscp_index, (unsigned int) mscp, config.aborted[mscp_index]); |
| 1153 | #endif |
| 1154 | config.aborted[mscp_index] = 0; |
| 1155 | |
| 1156 | if (done) |
| 1157 | done(SCtmp); |
| 1158 | else |
| 1159 | printk("US14F: interrupt: unexpected interrupt\n"); |
| 1160 | |
| 1161 | if (config.slot ? inb(config.icm_address - 1) : |
| 1162 | (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1)) |
| 1163 | #if (ULTRASTOR_DEBUG & UD_MULTI_CMD) |
| 1164 | printk("Ux4F: multiple commands completed\n"); |
| 1165 | #else |
| 1166 | ; |
| 1167 | #endif |
| 1168 | |
| 1169 | #if (ULTRASTOR_DEBUG & UD_INTERRUPT) |
| 1170 | printk("USx4F: interrupt: returning\n"); |
| 1171 | #endif |
| 1172 | } |
| 1173 | |
| 1174 | static irqreturn_t do_ultrastor_interrupt(int irq, void *dev_id, |
| 1175 | struct pt_regs *regs) |
| 1176 | { |
| 1177 | unsigned long flags; |
| 1178 | struct Scsi_Host *dev = dev_id; |
| 1179 | |
| 1180 | spin_lock_irqsave(dev->host_lock, flags); |
| 1181 | ultrastor_interrupt(irq, dev_id, regs); |
| 1182 | spin_unlock_irqrestore(dev->host_lock, flags); |
| 1183 | return IRQ_HANDLED; |
| 1184 | } |
| 1185 | |
| 1186 | MODULE_LICENSE("GPL"); |
| 1187 | |
Christoph Hellwig | d0be4a7d | 2005-10-31 18:31:40 +0100 | [diff] [blame] | 1188 | static struct scsi_host_template driver_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | .name = "UltraStor 14F/24F/34F", |
| 1190 | .detect = ultrastor_detect, |
| 1191 | .release = ultrastor_release, |
| 1192 | .info = ultrastor_info, |
| 1193 | .queuecommand = ultrastor_queuecommand, |
| 1194 | .eh_abort_handler = ultrastor_abort, |
| 1195 | .eh_host_reset_handler = ultrastor_host_reset, |
| 1196 | .bios_param = ultrastor_biosparam, |
| 1197 | .can_queue = ULTRASTOR_MAX_CMDS, |
| 1198 | .sg_tablesize = ULTRASTOR_14F_MAX_SG, |
| 1199 | .cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN, |
| 1200 | .unchecked_isa_dma = 1, |
| 1201 | .use_clustering = ENABLE_CLUSTERING, |
| 1202 | }; |
| 1203 | #include "scsi_module.c" |