Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1996 John Shifflett, GeoLog Consulting |
| 3 | * john@geolog.com |
| 4 | * jshiffle@netcom.com |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC |
| 19 | * provided much of the inspiration and some of the code for this |
| 20 | * driver. Everything I know about Amiga DMA was gleaned from careful |
| 21 | * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I |
| 22 | * borrowed shamelessly from all over that source. Thanks Hamish! |
| 23 | * |
| 24 | * _This_ driver is (I feel) an improvement over the old one in |
| 25 | * several respects: |
| 26 | * |
| 27 | * - Target Disconnection/Reconnection is now supported. Any |
| 28 | * system with more than one device active on the SCSI bus |
| 29 | * will benefit from this. The driver defaults to what I |
| 30 | * call 'adaptive disconnect' - meaning that each command |
| 31 | * is evaluated individually as to whether or not it should |
| 32 | * be run with the option to disconnect/reselect (if the |
| 33 | * device chooses), or as a "SCSI-bus-hog". |
| 34 | * |
| 35 | * - Synchronous data transfers are now supported. Because of |
| 36 | * a few devices that choke after telling the driver that |
| 37 | * they can do sync transfers, we don't automatically use |
| 38 | * this faster protocol - it can be enabled via the command- |
| 39 | * line on a device-by-device basis. |
| 40 | * |
| 41 | * - Runtime operating parameters can now be specified through |
| 42 | * the 'amiboot' or the 'insmod' command line. For amiboot do: |
| 43 | * "amiboot [usual stuff] wd33c93=blah,blah,blah" |
| 44 | * The defaults should be good for most people. See the comment |
| 45 | * for 'setup_strings' below for more details. |
| 46 | * |
| 47 | * - The old driver relied exclusively on what the Western Digital |
| 48 | * docs call "Combination Level 2 Commands", which are a great |
| 49 | * idea in that the CPU is relieved of a lot of interrupt |
| 50 | * overhead. However, by accepting a certain (user-settable) |
| 51 | * amount of additional interrupts, this driver achieves |
| 52 | * better control over the SCSI bus, and data transfers are |
| 53 | * almost as fast while being much easier to define, track, |
| 54 | * and debug. |
| 55 | * |
| 56 | * |
| 57 | * TODO: |
| 58 | * more speed. linked commands. |
| 59 | * |
| 60 | * |
| 61 | * People with bug reports, wish-lists, complaints, comments, |
| 62 | * or improvements are asked to pah-leeez email me (John Shifflett) |
| 63 | * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get |
| 64 | * this thing into as good a shape as possible, and I'm positive |
| 65 | * there are lots of lurking bugs and "Stupid Places". |
| 66 | * |
| 67 | * Updates: |
| 68 | * |
| 69 | * Added support for pre -A chips, which don't have advanced features |
| 70 | * and will generate CSR_RESEL rather than CSR_RESEL_AM. |
| 71 | * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 72 | * |
| 73 | * Added support for Burst Mode DMA and Fast SCSI. Enabled the use of |
| 74 | * default_sx_per for asynchronous data transfers. Added adjustment |
| 75 | * of transfer periods in sx_table to the actual input-clock. |
| 76 | * peter fuerst <post@pfrst.de> February 2007 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | */ |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #include <linux/module.h> |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | #include <linux/string.h> |
| 82 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include <linux/init.h> |
Ralf Baechle | cf7f5b4 | 2006-03-03 16:34:08 +0000 | [diff] [blame] | 84 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #include <linux/blkdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #include <scsi/scsi.h> |
| 88 | #include <scsi/scsi_cmnd.h> |
| 89 | #include <scsi/scsi_device.h> |
| 90 | #include <scsi/scsi_host.h> |
| 91 | |
Adrian Bunk | 078dda9 | 2007-07-09 12:00:01 -0700 | [diff] [blame] | 92 | #include <asm/irq.h> |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #include "wd33c93.h" |
| 95 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 96 | #define optimum_sx_per(hostdata) (hostdata)->sx_table[1].period_ns |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 98 | |
| 99 | #define WD33C93_VERSION "1.26++" |
| 100 | #define WD33C93_DATE "10/Feb/2007" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | MODULE_AUTHOR("John Shifflett"); |
| 103 | MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); |
| 104 | MODULE_LICENSE("GPL"); |
| 105 | |
| 106 | /* |
| 107 | * 'setup_strings' is a single string used to pass operating parameters and |
| 108 | * settings from the kernel/module command-line to the driver. 'setup_args[]' |
| 109 | * is an array of strings that define the compile-time default values for |
| 110 | * these settings. If Linux boots with an amiboot or insmod command-line, |
| 111 | * those settings are combined with 'setup_args[]'. Note that amiboot |
| 112 | * command-lines are prefixed with "wd33c93=" while insmod uses a |
| 113 | * "setup_strings=" prefix. The driver recognizes the following keywords |
| 114 | * (lower case required) and arguments: |
| 115 | * |
| 116 | * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with |
| 117 | * the 7 possible SCSI devices. Set a bit to negotiate for |
| 118 | * asynchronous transfers on that device. To maintain |
| 119 | * backwards compatibility, a command-line such as |
| 120 | * "wd33c93=255" will be automatically translated to |
| 121 | * "wd33c93=nosync:0xff". |
| 122 | * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is |
| 123 | * optional - if not present, same as "nodma:1". |
| 124 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer |
| 125 | * period. Default is 500; acceptable values are 250 - 1000. |
| 126 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. |
| 127 | * x = 1 does 'adaptive' disconnects, which is the default |
| 128 | * and generally the best choice. |
| 129 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes |
| 130 | * various types of debug output to printed - see the DB_xxx |
| 131 | * defines in wd33c93.h |
| 132 | * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values |
| 133 | * would be from 8 through 20. Default is 8. |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 134 | * - burst:x -x = 1 to use Burst Mode (or Demand-Mode) DMA, x = 0 to use |
| 135 | * Single Byte DMA, which is the default. Argument is |
| 136 | * optional - if not present, same as "burst:1". |
| 137 | * - fast:x -x = 1 to enable Fast SCSI, which is only effective with |
| 138 | * input-clock divisor 4 (WD33C93_FS_16_20), x = 0 to disable |
| 139 | * it, which is the default. Argument is optional - if not |
| 140 | * present, same as "fast:1". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | * - next -No argument. Used to separate blocks of keywords when |
| 142 | * there's more than one host adapter in the system. |
| 143 | * |
| 144 | * Syntax Notes: |
| 145 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There |
| 146 | * _must_ be a colon between a keyword and its numeric argument, with no |
| 147 | * spaces. |
| 148 | * - Keywords are separated by commas, no spaces, in the standard kernel |
| 149 | * command-line manner. |
| 150 | * - A keyword in the 'nth' comma-separated command-line member will overwrite |
| 151 | * the 'nth' element of setup_args[]. A blank command-line member (in |
| 152 | * other words, a comma with no preceding keyword) will _not_ overwrite |
| 153 | * the corresponding setup_args[] element. |
| 154 | * - If a keyword is used more than once, the first one applies to the first |
| 155 | * SCSI host found, the second to the second card, etc, unless the 'next' |
| 156 | * keyword is used to change the order. |
| 157 | * |
| 158 | * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): |
| 159 | * - wd33c93=nosync:255 |
| 160 | * - wd33c93=nodma |
| 161 | * - wd33c93=nodma:1 |
| 162 | * - wd33c93=disconnect:2,nosync:0x08,period:250 |
| 163 | * - wd33c93=debug:0x1c |
| 164 | */ |
| 165 | |
| 166 | /* Normally, no defaults are specified */ |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 167 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "", "" }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | static char *setup_strings; |
| 170 | module_param(setup_strings, charp, 0); |
| 171 | |
| 172 | static void wd33c93_execute(struct Scsi_Host *instance); |
| 173 | |
| 174 | #ifdef CONFIG_WD33C93_PIO |
| 175 | static inline uchar |
| 176 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
| 177 | { |
| 178 | uchar data; |
| 179 | |
| 180 | outb(reg_num, regs.SASR); |
| 181 | data = inb(regs.SCMD); |
| 182 | return data; |
| 183 | } |
| 184 | |
| 185 | static inline unsigned long |
| 186 | read_wd33c93_count(const wd33c93_regs regs) |
| 187 | { |
| 188 | unsigned long value; |
| 189 | |
| 190 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
| 191 | value = inb(regs.SCMD) << 16; |
| 192 | value |= inb(regs.SCMD) << 8; |
| 193 | value |= inb(regs.SCMD); |
| 194 | return value; |
| 195 | } |
| 196 | |
| 197 | static inline uchar |
| 198 | read_aux_stat(const wd33c93_regs regs) |
| 199 | { |
| 200 | return inb(regs.SASR); |
| 201 | } |
| 202 | |
| 203 | static inline void |
| 204 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
| 205 | { |
| 206 | outb(reg_num, regs.SASR); |
| 207 | outb(value, regs.SCMD); |
| 208 | } |
| 209 | |
| 210 | static inline void |
| 211 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
| 212 | { |
| 213 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); |
| 214 | outb((value >> 16) & 0xff, regs.SCMD); |
| 215 | outb((value >> 8) & 0xff, regs.SCMD); |
| 216 | outb( value & 0xff, regs.SCMD); |
| 217 | } |
| 218 | |
| 219 | #define write_wd33c93_cmd(regs, cmd) \ |
| 220 | write_wd33c93((regs), WD_COMMAND, (cmd)) |
| 221 | |
| 222 | static inline void |
| 223 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
| 224 | { |
| 225 | int i; |
| 226 | |
| 227 | outb(WD_CDB_1, regs.SASR); |
| 228 | for (i=0; i<len; i++) |
| 229 | outb(cmnd[i], regs.SCMD); |
| 230 | } |
| 231 | |
| 232 | #else /* CONFIG_WD33C93_PIO */ |
| 233 | static inline uchar |
| 234 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) |
| 235 | { |
| 236 | *regs.SASR = reg_num; |
| 237 | mb(); |
| 238 | return (*regs.SCMD); |
| 239 | } |
| 240 | |
| 241 | static unsigned long |
| 242 | read_wd33c93_count(const wd33c93_regs regs) |
| 243 | { |
| 244 | unsigned long value; |
| 245 | |
| 246 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
| 247 | mb(); |
| 248 | value = *regs.SCMD << 16; |
| 249 | value |= *regs.SCMD << 8; |
| 250 | value |= *regs.SCMD; |
| 251 | mb(); |
| 252 | return value; |
| 253 | } |
| 254 | |
| 255 | static inline uchar |
| 256 | read_aux_stat(const wd33c93_regs regs) |
| 257 | { |
| 258 | return *regs.SASR; |
| 259 | } |
| 260 | |
| 261 | static inline void |
| 262 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) |
| 263 | { |
| 264 | *regs.SASR = reg_num; |
| 265 | mb(); |
| 266 | *regs.SCMD = value; |
| 267 | mb(); |
| 268 | } |
| 269 | |
| 270 | static void |
| 271 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) |
| 272 | { |
| 273 | *regs.SASR = WD_TRANSFER_COUNT_MSB; |
| 274 | mb(); |
| 275 | *regs.SCMD = value >> 16; |
| 276 | *regs.SCMD = value >> 8; |
| 277 | *regs.SCMD = value; |
| 278 | mb(); |
| 279 | } |
| 280 | |
| 281 | static inline void |
| 282 | write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) |
| 283 | { |
| 284 | *regs.SASR = WD_COMMAND; |
| 285 | mb(); |
| 286 | *regs.SCMD = cmd; |
| 287 | mb(); |
| 288 | } |
| 289 | |
| 290 | static inline void |
| 291 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) |
| 292 | { |
| 293 | int i; |
| 294 | |
| 295 | *regs.SASR = WD_CDB_1; |
| 296 | for (i = 0; i < len; i++) |
| 297 | *regs.SCMD = cmnd[i]; |
| 298 | } |
| 299 | #endif /* CONFIG_WD33C93_PIO */ |
| 300 | |
| 301 | static inline uchar |
| 302 | read_1_byte(const wd33c93_regs regs) |
| 303 | { |
| 304 | uchar asr; |
| 305 | uchar x = 0; |
| 306 | |
| 307 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 308 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); |
| 309 | do { |
| 310 | asr = read_aux_stat(regs); |
| 311 | if (asr & ASR_DBR) |
| 312 | x = read_wd33c93(regs, WD_DATA); |
| 313 | } while (!(asr & ASR_INT)); |
| 314 | return x; |
| 315 | } |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | static int |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 318 | round_period(unsigned int period, const struct sx_period *sx_table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | { |
| 320 | int x; |
| 321 | |
| 322 | for (x = 1; sx_table[x].period_ns; x++) { |
| 323 | if ((period <= sx_table[x - 0].period_ns) && |
| 324 | (period > sx_table[x - 1].period_ns)) { |
| 325 | return x; |
| 326 | } |
| 327 | } |
| 328 | return 7; |
| 329 | } |
| 330 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 331 | /* |
| 332 | * Calculate Synchronous Transfer Register value from SDTR code. |
| 333 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | static uchar |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 335 | calc_sync_xfer(unsigned int period, unsigned int offset, unsigned int fast, |
| 336 | const struct sx_period *sx_table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 338 | /* When doing Fast SCSI synchronous data transfers, the corresponding |
| 339 | * value in 'sx_table' is two times the actually used transfer period. |
| 340 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | uchar result; |
| 342 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 343 | if (offset && fast) { |
| 344 | fast = STR_FSS; |
| 345 | period *= 2; |
| 346 | } else { |
| 347 | fast = 0; |
| 348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | period *= 4; /* convert SDTR code to ns */ |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 350 | result = sx_table[round_period(period,sx_table)].reg_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 352 | result |= fast; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | return result; |
| 354 | } |
| 355 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 356 | /* |
| 357 | * Calculate SDTR code bytes [3],[4] from period and offset. |
| 358 | */ |
| 359 | static inline void |
| 360 | calc_sync_msg(unsigned int period, unsigned int offset, unsigned int fast, |
| 361 | uchar msg[2]) |
| 362 | { |
| 363 | /* 'period' is a "normal"-mode value, like the ones in 'sx_table'. The |
| 364 | * actually used transfer period for Fast SCSI synchronous data |
| 365 | * transfers is half that value. |
| 366 | */ |
| 367 | period /= 4; |
| 368 | if (offset && fast) |
| 369 | period /= 2; |
| 370 | msg[0] = period; |
| 371 | msg[1] = offset; |
| 372 | } |
| 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | int |
| 375 | wd33c93_queuecommand(struct scsi_cmnd *cmd, |
| 376 | void (*done)(struct scsi_cmnd *)) |
| 377 | { |
| 378 | struct WD33C93_hostdata *hostdata; |
| 379 | struct scsi_cmnd *tmp; |
| 380 | |
| 381 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
| 382 | |
| 383 | DB(DB_QUEUE_COMMAND, |
| 384 | printk("Q-%d-%02x-%ld( ", cmd->device->id, cmd->cmnd[0], cmd->pid)) |
| 385 | |
| 386 | /* Set up a few fields in the scsi_cmnd structure for our own use: |
| 387 | * - host_scribble is the pointer to the next cmd in the input queue |
| 388 | * - scsi_done points to the routine we call when a cmd is finished |
| 389 | * - result is what you'd expect |
| 390 | */ |
| 391 | cmd->host_scribble = NULL; |
| 392 | cmd->scsi_done = done; |
| 393 | cmd->result = 0; |
| 394 | |
| 395 | /* We use the Scsi_Pointer structure that's included with each command |
| 396 | * as a scratchpad (as it's intended to be used!). The handy thing about |
| 397 | * the SCp.xxx fields is that they're always associated with a given |
| 398 | * cmd, and are preserved across disconnect-reselect. This means we |
| 399 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages |
| 400 | * if we keep all the critical pointers and counters in SCp: |
| 401 | * - SCp.ptr is the pointer into the RAM buffer |
| 402 | * - SCp.this_residual is the size of that buffer |
| 403 | * - SCp.buffer points to the current scatter-gather buffer |
| 404 | * - SCp.buffers_residual tells us how many S.G. buffers there are |
| 405 | * - SCp.have_data_in is not used |
| 406 | * - SCp.sent_command is not used |
| 407 | * - SCp.phase records this command's SRCID_ER bit setting |
| 408 | */ |
| 409 | |
| 410 | if (cmd->use_sg) { |
Christoph Hellwig | 79bd3f8 | 2006-07-14 10:29:34 +0200 | [diff] [blame] | 411 | cmd->SCp.buffer = (struct scatterlist *) cmd->request_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | cmd->SCp.buffers_residual = cmd->use_sg - 1; |
| 413 | cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + |
| 414 | cmd->SCp.buffer->offset; |
| 415 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
| 416 | } else { |
| 417 | cmd->SCp.buffer = NULL; |
| 418 | cmd->SCp.buffers_residual = 0; |
| 419 | cmd->SCp.ptr = (char *) cmd->request_buffer; |
| 420 | cmd->SCp.this_residual = cmd->request_bufflen; |
| 421 | } |
| 422 | |
| 423 | /* WD docs state that at the conclusion of a "LEVEL2" command, the |
| 424 | * status byte can be retrieved from the LUN register. Apparently, |
| 425 | * this is the case only for *uninterrupted* LEVEL2 commands! If |
| 426 | * there are any unexpected phases entered, even if they are 100% |
| 427 | * legal (different devices may choose to do things differently), |
| 428 | * the LEVEL2 command sequence is exited. This often occurs prior |
| 429 | * to receiving the status byte, in which case the driver does a |
| 430 | * status phase interrupt and gets the status byte on its own. |
| 431 | * While such a command can then be "resumed" (ie restarted to |
| 432 | * finish up as a LEVEL2 command), the LUN register will NOT be |
| 433 | * a valid status byte at the command's conclusion, and we must |
| 434 | * use the byte obtained during the earlier interrupt. Here, we |
| 435 | * preset SCp.Status to an illegal value (0xff) so that when |
| 436 | * this command finally completes, we can tell where the actual |
| 437 | * status byte is stored. |
| 438 | */ |
| 439 | |
| 440 | cmd->SCp.Status = ILLEGAL_STATUS_BYTE; |
| 441 | |
| 442 | /* |
| 443 | * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE |
| 444 | * commands are added to the head of the queue so that the desired |
| 445 | * sense data is not lost before REQUEST_SENSE executes. |
| 446 | */ |
| 447 | |
| 448 | spin_lock_irq(&hostdata->lock); |
| 449 | |
| 450 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { |
| 451 | cmd->host_scribble = (uchar *) hostdata->input_Q; |
| 452 | hostdata->input_Q = cmd; |
| 453 | } else { /* find the end of the queue */ |
| 454 | for (tmp = (struct scsi_cmnd *) hostdata->input_Q; |
| 455 | tmp->host_scribble; |
| 456 | tmp = (struct scsi_cmnd *) tmp->host_scribble) ; |
| 457 | tmp->host_scribble = (uchar *) cmd; |
| 458 | } |
| 459 | |
| 460 | /* We know that there's at least one command in 'input_Q' now. |
| 461 | * Go see if any of them are runnable! |
| 462 | */ |
| 463 | |
| 464 | wd33c93_execute(cmd->device->host); |
| 465 | |
| 466 | DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid)) |
| 467 | |
| 468 | spin_unlock_irq(&hostdata->lock); |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * This routine attempts to start a scsi command. If the host_card is |
| 474 | * already connected, we give up immediately. Otherwise, look through |
| 475 | * the input_Q, using the first command we find that's intended |
| 476 | * for a currently non-busy target/lun. |
| 477 | * |
| 478 | * wd33c93_execute() is always called with interrupts disabled or from |
| 479 | * the wd33c93_intr itself, which means that a wd33c93 interrupt |
| 480 | * cannot occur while we are in here. |
| 481 | */ |
| 482 | static void |
| 483 | wd33c93_execute(struct Scsi_Host *instance) |
| 484 | { |
| 485 | struct WD33C93_hostdata *hostdata = |
| 486 | (struct WD33C93_hostdata *) instance->hostdata; |
| 487 | const wd33c93_regs regs = hostdata->regs; |
| 488 | struct scsi_cmnd *cmd, *prev; |
| 489 | |
| 490 | DB(DB_EXECUTE, printk("EX(")) |
| 491 | if (hostdata->selecting || hostdata->connected) { |
| 492 | DB(DB_EXECUTE, printk(")EX-0 ")) |
| 493 | return; |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | * Search through the input_Q for a command destined |
| 498 | * for an idle target/lun. |
| 499 | */ |
| 500 | |
| 501 | cmd = (struct scsi_cmnd *) hostdata->input_Q; |
Al Viro | a5d361f | 2006-01-12 01:06:34 -0800 | [diff] [blame] | 502 | prev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | while (cmd) { |
| 504 | if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun))) |
| 505 | break; |
| 506 | prev = cmd; |
| 507 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 508 | } |
| 509 | |
| 510 | /* quit if queue empty or all possible targets are busy */ |
| 511 | |
| 512 | if (!cmd) { |
| 513 | DB(DB_EXECUTE, printk(")EX-1 ")) |
| 514 | return; |
| 515 | } |
| 516 | |
| 517 | /* remove command from queue */ |
| 518 | |
| 519 | if (prev) |
| 520 | prev->host_scribble = cmd->host_scribble; |
| 521 | else |
| 522 | hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; |
| 523 | |
| 524 | #ifdef PROC_STATISTICS |
| 525 | hostdata->cmd_cnt[cmd->device->id]++; |
| 526 | #endif |
| 527 | |
| 528 | /* |
| 529 | * Start the selection process |
| 530 | */ |
| 531 | |
| 532 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 533 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
| 534 | else |
| 535 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); |
| 536 | |
| 537 | /* Now we need to figure out whether or not this command is a good |
| 538 | * candidate for disconnect/reselect. We guess to the best of our |
| 539 | * ability, based on a set of hierarchical rules. When several |
| 540 | * devices are operating simultaneously, disconnects are usually |
| 541 | * an advantage. In a single device system, or if only 1 device |
| 542 | * is being accessed, transfers usually go faster if disconnects |
| 543 | * are not allowed: |
| 544 | * |
| 545 | * + Commands should NEVER disconnect if hostdata->disconnect = |
| 546 | * DIS_NEVER (this holds for tape drives also), and ALWAYS |
| 547 | * disconnect if hostdata->disconnect = DIS_ALWAYS. |
| 548 | * + Tape drive commands should always be allowed to disconnect. |
| 549 | * + Disconnect should be allowed if disconnected_Q isn't empty. |
| 550 | * + Commands should NOT disconnect if input_Q is empty. |
| 551 | * + Disconnect should be allowed if there are commands in input_Q |
| 552 | * for a different target/lun. In this case, the other commands |
| 553 | * should be made disconnect-able, if not already. |
| 554 | * |
| 555 | * I know, I know - this code would flunk me out of any |
| 556 | * "C Programming 101" class ever offered. But it's easy |
| 557 | * to change around and experiment with for now. |
| 558 | */ |
| 559 | |
| 560 | cmd->SCp.phase = 0; /* assume no disconnect */ |
| 561 | if (hostdata->disconnect == DIS_NEVER) |
| 562 | goto no; |
| 563 | if (hostdata->disconnect == DIS_ALWAYS) |
| 564 | goto yes; |
| 565 | if (cmd->device->type == 1) /* tape drive? */ |
| 566 | goto yes; |
| 567 | if (hostdata->disconnected_Q) /* other commands disconnected? */ |
| 568 | goto yes; |
| 569 | if (!(hostdata->input_Q)) /* input_Q empty? */ |
| 570 | goto no; |
| 571 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
| 572 | prev = (struct scsi_cmnd *) prev->host_scribble) { |
| 573 | if ((prev->device->id != cmd->device->id) || |
| 574 | (prev->device->lun != cmd->device->lun)) { |
| 575 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; |
| 576 | prev = (struct scsi_cmnd *) prev->host_scribble) |
| 577 | prev->SCp.phase = 1; |
| 578 | goto yes; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | goto no; |
| 583 | |
| 584 | yes: |
| 585 | cmd->SCp.phase = 1; |
| 586 | |
| 587 | #ifdef PROC_STATISTICS |
| 588 | hostdata->disc_allowed_cnt[cmd->device->id]++; |
| 589 | #endif |
| 590 | |
| 591 | no: |
| 592 | |
| 593 | write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); |
| 594 | |
| 595 | write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun); |
| 596 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 597 | hostdata->sync_xfer[cmd->device->id]); |
| 598 | hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun); |
| 599 | |
| 600 | if ((hostdata->level2 == L2_NONE) || |
| 601 | (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { |
| 602 | |
| 603 | /* |
| 604 | * Do a 'Select-With-ATN' command. This will end with |
| 605 | * one of the following interrupts: |
| 606 | * CSR_RESEL_AM: failure - can try again later. |
| 607 | * CSR_TIMEOUT: failure - give up. |
| 608 | * CSR_SELECT: success - proceed. |
| 609 | */ |
| 610 | |
| 611 | hostdata->selecting = cmd; |
| 612 | |
| 613 | /* Every target has its own synchronous transfer setting, kept in the |
| 614 | * sync_xfer array, and a corresponding status byte in sync_stat[]. |
| 615 | * Each target's sync_stat[] entry is initialized to SX_UNSET, and its |
| 616 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET |
| 617 | * means that the parameters are undetermined as yet, and that we |
| 618 | * need to send an SDTR message to this device after selection is |
| 619 | * complete: We set SS_FIRST to tell the interrupt routine to do so. |
| 620 | * If we've been asked not to try synchronous transfers on this |
| 621 | * target (and _all_ luns within it), we'll still send the SDTR message |
| 622 | * later, but at that time we'll negotiate for async by specifying a |
| 623 | * sync fifo depth of 0. |
| 624 | */ |
| 625 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) |
| 626 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; |
| 627 | hostdata->state = S_SELECTING; |
| 628 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 629 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); |
| 630 | } else { |
| 631 | |
| 632 | /* |
| 633 | * Do a 'Select-With-ATN-Xfer' command. This will end with |
| 634 | * one of the following interrupts: |
| 635 | * CSR_RESEL_AM: failure - can try again later. |
| 636 | * CSR_TIMEOUT: failure - give up. |
| 637 | * anything else: success - proceed. |
| 638 | */ |
| 639 | |
| 640 | hostdata->connected = cmd; |
| 641 | write_wd33c93(regs, WD_COMMAND_PHASE, 0); |
| 642 | |
| 643 | /* copy command_descriptor_block into WD chip |
| 644 | * (take advantage of auto-incrementing) |
| 645 | */ |
| 646 | |
| 647 | write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); |
| 648 | |
| 649 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when |
| 650 | * it's doing a 'select-and-transfer'. To be safe, we write the |
| 651 | * size of the CDB into the OWN_ID register for every case. This |
| 652 | * way there won't be problems with vendor-unique, audio, etc. |
| 653 | */ |
| 654 | |
| 655 | write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); |
| 656 | |
| 657 | /* When doing a non-disconnect command with DMA, we can save |
| 658 | * ourselves a DATA phase interrupt later by setting everything |
| 659 | * up ahead of time. |
| 660 | */ |
| 661 | |
| 662 | if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { |
| 663 | if (hostdata->dma_setup(cmd, |
| 664 | (cmd->sc_data_direction == DMA_TO_DEVICE) ? |
| 665 | DATA_OUT_DIR : DATA_IN_DIR)) |
| 666 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 667 | else { |
| 668 | write_wd33c93_count(regs, |
| 669 | cmd->SCp.this_residual); |
| 670 | write_wd33c93(regs, WD_CONTROL, |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 671 | CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | hostdata->dma = D_DMA_RUNNING; |
| 673 | } |
| 674 | } else |
| 675 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ |
| 676 | |
| 677 | hostdata->state = S_RUNNING_LEVEL2; |
| 678 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 679 | } |
| 680 | |
| 681 | /* |
| 682 | * Since the SCSI bus can handle only 1 connection at a time, |
| 683 | * we get out of here now. If the selection fails, or when |
| 684 | * the command disconnects, we'll come back to this routine |
| 685 | * to search the input_Q again... |
| 686 | */ |
| 687 | |
| 688 | DB(DB_EXECUTE, |
| 689 | printk("%s%ld)EX-2 ", (cmd->SCp.phase) ? "d:" : "", cmd->pid)) |
| 690 | } |
| 691 | |
| 692 | static void |
| 693 | transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, |
| 694 | int data_in_dir, struct WD33C93_hostdata *hostdata) |
| 695 | { |
| 696 | uchar asr; |
| 697 | |
| 698 | DB(DB_TRANSFER, |
| 699 | printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) |
| 700 | |
| 701 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 702 | write_wd33c93_count(regs, cnt); |
| 703 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
| 704 | if (data_in_dir) { |
| 705 | do { |
| 706 | asr = read_aux_stat(regs); |
| 707 | if (asr & ASR_DBR) |
| 708 | *buf++ = read_wd33c93(regs, WD_DATA); |
| 709 | } while (!(asr & ASR_INT)); |
| 710 | } else { |
| 711 | do { |
| 712 | asr = read_aux_stat(regs); |
| 713 | if (asr & ASR_DBR) |
| 714 | write_wd33c93(regs, WD_DATA, *buf++); |
| 715 | } while (!(asr & ASR_INT)); |
| 716 | } |
| 717 | |
| 718 | /* Note: we are returning with the interrupt UN-cleared. |
| 719 | * Since (presumably) an entire I/O operation has |
| 720 | * completed, the bus phase is probably different, and |
| 721 | * the interrupt routine will discover this when it |
| 722 | * responds to the uncleared int. |
| 723 | */ |
| 724 | |
| 725 | } |
| 726 | |
| 727 | static void |
| 728 | transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, |
| 729 | int data_in_dir) |
| 730 | { |
| 731 | struct WD33C93_hostdata *hostdata; |
| 732 | unsigned long length; |
| 733 | |
| 734 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; |
| 735 | |
| 736 | /* Normally, you'd expect 'this_residual' to be non-zero here. |
| 737 | * In a series of scatter-gather transfers, however, this |
| 738 | * routine will usually be called with 'this_residual' equal |
| 739 | * to 0 and 'buffers_residual' non-zero. This means that a |
| 740 | * previous transfer completed, clearing 'this_residual', and |
| 741 | * now we need to setup the next scatter-gather buffer as the |
| 742 | * source or destination for THIS transfer. |
| 743 | */ |
| 744 | if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { |
| 745 | ++cmd->SCp.buffer; |
| 746 | --cmd->SCp.buffers_residual; |
| 747 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
| 748 | cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + |
| 749 | cmd->SCp.buffer->offset; |
| 750 | } |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 751 | if (!cmd->SCp.this_residual) /* avoid bogus setups */ |
| 752 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | |
| 754 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 755 | hostdata->sync_xfer[cmd->device->id]); |
| 756 | |
| 757 | /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. |
| 758 | * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. |
| 759 | */ |
| 760 | |
| 761 | if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { |
| 762 | #ifdef PROC_STATISTICS |
| 763 | hostdata->pio_cnt++; |
| 764 | #endif |
| 765 | transfer_pio(regs, (uchar *) cmd->SCp.ptr, |
| 766 | cmd->SCp.this_residual, data_in_dir, hostdata); |
| 767 | length = cmd->SCp.this_residual; |
| 768 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
| 769 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
| 770 | } |
| 771 | |
| 772 | /* We are able to do DMA (in fact, the Amiga hardware is |
| 773 | * already going!), so start up the wd33c93 in DMA mode. |
| 774 | * We set 'hostdata->dma' = D_DMA_RUNNING so that when the |
| 775 | * transfer completes and causes an interrupt, we're |
| 776 | * reminded to tell the Amiga to shut down its end. We'll |
| 777 | * postpone the updating of 'this_residual' and 'ptr' |
| 778 | * until then. |
| 779 | */ |
| 780 | |
| 781 | else { |
| 782 | #ifdef PROC_STATISTICS |
| 783 | hostdata->dma_cnt++; |
| 784 | #endif |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 785 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | write_wd33c93_count(regs, cmd->SCp.this_residual); |
| 787 | |
| 788 | if ((hostdata->level2 >= L2_DATA) || |
| 789 | (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { |
| 790 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 791 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 792 | hostdata->state = S_RUNNING_LEVEL2; |
| 793 | } else |
| 794 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); |
| 795 | |
| 796 | hostdata->dma = D_DMA_RUNNING; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | void |
| 801 | wd33c93_intr(struct Scsi_Host *instance) |
| 802 | { |
| 803 | struct WD33C93_hostdata *hostdata = |
| 804 | (struct WD33C93_hostdata *) instance->hostdata; |
| 805 | const wd33c93_regs regs = hostdata->regs; |
| 806 | struct scsi_cmnd *patch, *cmd; |
| 807 | uchar asr, sr, phs, id, lun, *ucp, msg; |
| 808 | unsigned long length, flags; |
| 809 | |
| 810 | asr = read_aux_stat(regs); |
| 811 | if (!(asr & ASR_INT) || (asr & ASR_BSY)) |
| 812 | return; |
| 813 | |
| 814 | spin_lock_irqsave(&hostdata->lock, flags); |
| 815 | |
| 816 | #ifdef PROC_STATISTICS |
| 817 | hostdata->int_cnt++; |
| 818 | #endif |
| 819 | |
| 820 | cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ |
| 821 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ |
| 822 | phs = read_wd33c93(regs, WD_COMMAND_PHASE); |
| 823 | |
| 824 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) |
| 825 | |
| 826 | /* After starting a DMA transfer, the next interrupt |
| 827 | * is guaranteed to be in response to completion of |
| 828 | * the transfer. Since the Amiga DMA hardware runs in |
| 829 | * in an open-ended fashion, it needs to be told when |
| 830 | * to stop; do that here if D_DMA_RUNNING is true. |
| 831 | * Also, we have to update 'this_residual' and 'ptr' |
| 832 | * based on the contents of the TRANSFER_COUNT register, |
| 833 | * in case the device decided to do an intermediate |
| 834 | * disconnect (a device may do this if it has to do a |
| 835 | * seek, or just to be nice and let other devices have |
| 836 | * some bus time during long transfers). After doing |
| 837 | * whatever is needed, we go on and service the WD3393 |
| 838 | * interrupt normally. |
| 839 | */ |
| 840 | if (hostdata->dma == D_DMA_RUNNING) { |
| 841 | DB(DB_TRANSFER, |
| 842 | printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) |
| 843 | hostdata->dma_stop(cmd->device->host, cmd, 1); |
| 844 | hostdata->dma = D_DMA_OFF; |
| 845 | length = cmd->SCp.this_residual; |
| 846 | cmd->SCp.this_residual = read_wd33c93_count(regs); |
| 847 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); |
| 848 | DB(DB_TRANSFER, |
| 849 | printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) |
| 850 | } |
| 851 | |
| 852 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ |
| 853 | switch (sr) { |
| 854 | case CSR_TIMEOUT: |
| 855 | DB(DB_INTR, printk("TIMEOUT")) |
| 856 | |
| 857 | if (hostdata->state == S_RUNNING_LEVEL2) |
| 858 | hostdata->connected = NULL; |
| 859 | else { |
| 860 | cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ |
| 861 | hostdata->selecting = NULL; |
| 862 | } |
| 863 | |
| 864 | cmd->result = DID_NO_CONNECT << 16; |
| 865 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 866 | hostdata->state = S_UNCONNECTED; |
| 867 | cmd->scsi_done(cmd); |
| 868 | |
| 869 | /* From esp.c: |
| 870 | * There is a window of time within the scsi_done() path |
| 871 | * of execution where interrupts are turned back on full |
| 872 | * blast and left that way. During that time we could |
| 873 | * reconnect to a disconnected command, then we'd bomb |
| 874 | * out below. We could also end up executing two commands |
| 875 | * at _once_. ...just so you know why the restore_flags() |
| 876 | * is here... |
| 877 | */ |
| 878 | |
| 879 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 880 | |
| 881 | /* We are not connected to a target - check to see if there |
| 882 | * are commands waiting to be executed. |
| 883 | */ |
| 884 | |
| 885 | wd33c93_execute(instance); |
| 886 | break; |
| 887 | |
| 888 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
| 889 | |
| 890 | case CSR_SELECT: |
| 891 | DB(DB_INTR, printk("SELECT")) |
| 892 | hostdata->connected = cmd = |
| 893 | (struct scsi_cmnd *) hostdata->selecting; |
| 894 | hostdata->selecting = NULL; |
| 895 | |
| 896 | /* construct an IDENTIFY message with correct disconnect bit */ |
| 897 | |
| 898 | hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun); |
| 899 | if (cmd->SCp.phase) |
| 900 | hostdata->outgoing_msg[0] |= 0x40; |
| 901 | |
| 902 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; |
| 905 | |
| 906 | /* Tack on a 2nd message to ask about synchronous transfers. If we've |
| 907 | * been asked to do only asynchronous transfers on this device, we |
| 908 | * request a fifo depth of 0, which is equivalent to async - should |
| 909 | * solve the problems some people have had with GVP's Guru ROM. |
| 910 | */ |
| 911 | |
| 912 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; |
| 913 | hostdata->outgoing_msg[2] = 3; |
| 914 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; |
| 915 | if (hostdata->no_sync & (1 << cmd->device->id)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 916 | calc_sync_msg(hostdata->default_sx_per, 0, |
| 917 | 0, hostdata->outgoing_msg + 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } else { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 919 | calc_sync_msg(optimum_sx_per(hostdata), |
| 920 | OPTIMUM_SX_OFF, |
| 921 | hostdata->fast, |
| 922 | hostdata->outgoing_msg + 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
| 924 | hostdata->outgoing_len = 6; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 925 | #ifdef SYNC_DEBUG |
| 926 | ucp = hostdata->outgoing_msg + 1; |
| 927 | printk(" sending SDTR %02x03%02x%02x%02x ", |
| 928 | ucp[0], ucp[2], ucp[3], ucp[4]); |
| 929 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | } else |
| 931 | hostdata->outgoing_len = 1; |
| 932 | |
| 933 | hostdata->state = S_CONNECTED; |
| 934 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 935 | break; |
| 936 | |
| 937 | case CSR_XFER_DONE | PHS_DATA_IN: |
| 938 | case CSR_UNEXP | PHS_DATA_IN: |
| 939 | case CSR_SRV_REQ | PHS_DATA_IN: |
| 940 | DB(DB_INTR, |
| 941 | printk("IN-%d.%d", cmd->SCp.this_residual, |
| 942 | cmd->SCp.buffers_residual)) |
| 943 | transfer_bytes(regs, cmd, DATA_IN_DIR); |
| 944 | if (hostdata->state != S_RUNNING_LEVEL2) |
| 945 | hostdata->state = S_CONNECTED; |
| 946 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 947 | break; |
| 948 | |
| 949 | case CSR_XFER_DONE | PHS_DATA_OUT: |
| 950 | case CSR_UNEXP | PHS_DATA_OUT: |
| 951 | case CSR_SRV_REQ | PHS_DATA_OUT: |
| 952 | DB(DB_INTR, |
| 953 | printk("OUT-%d.%d", cmd->SCp.this_residual, |
| 954 | cmd->SCp.buffers_residual)) |
| 955 | transfer_bytes(regs, cmd, DATA_OUT_DIR); |
| 956 | if (hostdata->state != S_RUNNING_LEVEL2) |
| 957 | hostdata->state = S_CONNECTED; |
| 958 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 959 | break; |
| 960 | |
| 961 | /* Note: this interrupt should not occur in a LEVEL2 command */ |
| 962 | |
| 963 | case CSR_XFER_DONE | PHS_COMMAND: |
| 964 | case CSR_UNEXP | PHS_COMMAND: |
| 965 | case CSR_SRV_REQ | PHS_COMMAND: |
| 966 | DB(DB_INTR, printk("CMND-%02x,%ld", cmd->cmnd[0], cmd->pid)) |
| 967 | transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, |
| 968 | hostdata); |
| 969 | hostdata->state = S_CONNECTED; |
| 970 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 971 | break; |
| 972 | |
| 973 | case CSR_XFER_DONE | PHS_STATUS: |
| 974 | case CSR_UNEXP | PHS_STATUS: |
| 975 | case CSR_SRV_REQ | PHS_STATUS: |
| 976 | DB(DB_INTR, printk("STATUS=")) |
| 977 | cmd->SCp.Status = read_1_byte(regs); |
| 978 | DB(DB_INTR, printk("%02x", cmd->SCp.Status)) |
| 979 | if (hostdata->level2 >= L2_BASIC) { |
| 980 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
Roman Zippel | 882905c | 2006-06-23 02:04:57 -0700 | [diff] [blame] | 981 | udelay(7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | hostdata->state = S_RUNNING_LEVEL2; |
| 983 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); |
| 984 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 985 | } else { |
| 986 | hostdata->state = S_CONNECTED; |
| 987 | } |
| 988 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 989 | break; |
| 990 | |
| 991 | case CSR_XFER_DONE | PHS_MESS_IN: |
| 992 | case CSR_UNEXP | PHS_MESS_IN: |
| 993 | case CSR_SRV_REQ | PHS_MESS_IN: |
| 994 | DB(DB_INTR, printk("MSG_IN=")) |
| 995 | |
| 996 | msg = read_1_byte(regs); |
| 997 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ |
Roman Zippel | 882905c | 2006-06-23 02:04:57 -0700 | [diff] [blame] | 998 | udelay(7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
| 1000 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; |
| 1001 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) |
| 1002 | msg = EXTENDED_MESSAGE; |
| 1003 | else |
| 1004 | hostdata->incoming_ptr = 0; |
| 1005 | |
| 1006 | cmd->SCp.Message = msg; |
| 1007 | switch (msg) { |
| 1008 | |
| 1009 | case COMMAND_COMPLETE: |
| 1010 | DB(DB_INTR, printk("CCMP-%ld", cmd->pid)) |
| 1011 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1012 | hostdata->state = S_PRE_CMP_DISC; |
| 1013 | break; |
| 1014 | |
| 1015 | case SAVE_POINTERS: |
| 1016 | DB(DB_INTR, printk("SDP")) |
| 1017 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1018 | hostdata->state = S_CONNECTED; |
| 1019 | break; |
| 1020 | |
| 1021 | case RESTORE_POINTERS: |
| 1022 | DB(DB_INTR, printk("RDP")) |
| 1023 | if (hostdata->level2 >= L2_BASIC) { |
| 1024 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 1025 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 1026 | hostdata->state = S_RUNNING_LEVEL2; |
| 1027 | } else { |
| 1028 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1029 | hostdata->state = S_CONNECTED; |
| 1030 | } |
| 1031 | break; |
| 1032 | |
| 1033 | case DISCONNECT: |
| 1034 | DB(DB_INTR, printk("DIS")) |
| 1035 | cmd->device->disconnect = 1; |
| 1036 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1037 | hostdata->state = S_PRE_TMP_DISC; |
| 1038 | break; |
| 1039 | |
| 1040 | case MESSAGE_REJECT: |
| 1041 | DB(DB_INTR, printk("REJ")) |
| 1042 | #ifdef SYNC_DEBUG |
| 1043 | printk("-REJ-"); |
| 1044 | #endif |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1045 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1047 | /* we want default_sx_per, not DEFAULT_SX_PER */ |
| 1048 | hostdata->sync_xfer[cmd->device->id] = |
| 1049 | calc_sync_xfer(hostdata->default_sx_per |
| 1050 | / 4, 0, 0, hostdata->sx_table); |
| 1051 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1053 | hostdata->state = S_CONNECTED; |
| 1054 | break; |
| 1055 | |
| 1056 | case EXTENDED_MESSAGE: |
| 1057 | DB(DB_INTR, printk("EXT")) |
| 1058 | |
| 1059 | ucp = hostdata->incoming_msg; |
| 1060 | |
| 1061 | #ifdef SYNC_DEBUG |
| 1062 | printk("%02x", ucp[hostdata->incoming_ptr]); |
| 1063 | #endif |
| 1064 | /* Is this the last byte of the extended message? */ |
| 1065 | |
| 1066 | if ((hostdata->incoming_ptr >= 2) && |
| 1067 | (hostdata->incoming_ptr == (ucp[1] + 1))) { |
| 1068 | |
| 1069 | switch (ucp[2]) { /* what's the EXTENDED code? */ |
| 1070 | case EXTENDED_SDTR: |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1071 | /* default to default async period */ |
| 1072 | id = calc_sync_xfer(hostdata-> |
| 1073 | default_sx_per / 4, 0, |
| 1074 | 0, hostdata->sx_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | if (hostdata->sync_stat[cmd->device->id] != |
| 1076 | SS_WAITING) { |
| 1077 | |
| 1078 | /* A device has sent an unsolicited SDTR message; rather than go |
| 1079 | * through the effort of decoding it and then figuring out what |
| 1080 | * our reply should be, we're just gonna say that we have a |
| 1081 | * synchronous fifo depth of 0. This will result in asynchronous |
| 1082 | * transfers - not ideal but so much easier. |
| 1083 | * Actually, this is OK because it assures us that if we don't |
| 1084 | * specifically ask for sync transfers, we won't do any. |
| 1085 | */ |
| 1086 | |
| 1087 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1088 | hostdata->outgoing_msg[0] = |
| 1089 | EXTENDED_MESSAGE; |
| 1090 | hostdata->outgoing_msg[1] = 3; |
| 1091 | hostdata->outgoing_msg[2] = |
| 1092 | EXTENDED_SDTR; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1093 | calc_sync_msg(hostdata-> |
| 1094 | default_sx_per, 0, |
| 1095 | 0, hostdata->outgoing_msg + 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | hostdata->outgoing_len = 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | } else { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1098 | if (ucp[4]) /* well, sync transfer */ |
| 1099 | id = calc_sync_xfer(ucp[3], ucp[4], |
| 1100 | hostdata->fast, |
| 1101 | hostdata->sx_table); |
| 1102 | else if (ucp[3]) /* very unlikely... */ |
| 1103 | id = calc_sync_xfer(ucp[3], ucp[4], |
| 1104 | 0, hostdata->sx_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1106 | hostdata->sync_xfer[cmd->device->id] = id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | #ifdef SYNC_DEBUG |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1108 | printk(" sync_xfer=%02x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | hostdata->sync_xfer[cmd->device->id]); |
| 1110 | #endif |
| 1111 | hostdata->sync_stat[cmd->device->id] = |
| 1112 | SS_SET; |
| 1113 | write_wd33c93_cmd(regs, |
| 1114 | WD_CMD_NEGATE_ACK); |
| 1115 | hostdata->state = S_CONNECTED; |
| 1116 | break; |
| 1117 | case EXTENDED_WDTR: |
| 1118 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1119 | printk("sending WDTR "); |
| 1120 | hostdata->outgoing_msg[0] = |
| 1121 | EXTENDED_MESSAGE; |
| 1122 | hostdata->outgoing_msg[1] = 2; |
| 1123 | hostdata->outgoing_msg[2] = |
| 1124 | EXTENDED_WDTR; |
| 1125 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ |
| 1126 | hostdata->outgoing_len = 4; |
| 1127 | write_wd33c93_cmd(regs, |
| 1128 | WD_CMD_NEGATE_ACK); |
| 1129 | hostdata->state = S_CONNECTED; |
| 1130 | break; |
| 1131 | default: |
| 1132 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1133 | printk |
| 1134 | ("Rejecting Unknown Extended Message(%02x). ", |
| 1135 | ucp[2]); |
| 1136 | hostdata->outgoing_msg[0] = |
| 1137 | MESSAGE_REJECT; |
| 1138 | hostdata->outgoing_len = 1; |
| 1139 | write_wd33c93_cmd(regs, |
| 1140 | WD_CMD_NEGATE_ACK); |
| 1141 | hostdata->state = S_CONNECTED; |
| 1142 | break; |
| 1143 | } |
| 1144 | hostdata->incoming_ptr = 0; |
| 1145 | } |
| 1146 | |
| 1147 | /* We need to read more MESS_IN bytes for the extended message */ |
| 1148 | |
| 1149 | else { |
| 1150 | hostdata->incoming_ptr++; |
| 1151 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1152 | hostdata->state = S_CONNECTED; |
| 1153 | } |
| 1154 | break; |
| 1155 | |
| 1156 | default: |
| 1157 | printk("Rejecting Unknown Message(%02x) ", msg); |
| 1158 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ |
| 1159 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; |
| 1160 | hostdata->outgoing_len = 1; |
| 1161 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1162 | hostdata->state = S_CONNECTED; |
| 1163 | } |
| 1164 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1165 | break; |
| 1166 | |
| 1167 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
| 1168 | |
| 1169 | case CSR_SEL_XFER_DONE: |
| 1170 | |
| 1171 | /* Make sure that reselection is enabled at this point - it may |
| 1172 | * have been turned off for the command that just completed. |
| 1173 | */ |
| 1174 | |
| 1175 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1176 | if (phs == 0x60) { |
| 1177 | DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid)) |
| 1178 | cmd->SCp.Message = COMMAND_COMPLETE; |
| 1179 | lun = read_wd33c93(regs, WD_TARGET_LUN); |
| 1180 | DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) |
| 1181 | hostdata->connected = NULL; |
| 1182 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1183 | hostdata->state = S_UNCONNECTED; |
| 1184 | if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) |
| 1185 | cmd->SCp.Status = lun; |
| 1186 | if (cmd->cmnd[0] == REQUEST_SENSE |
| 1187 | && cmd->SCp.Status != GOOD) |
| 1188 | cmd->result = |
| 1189 | (cmd-> |
| 1190 | result & 0x00ffff) | (DID_ERROR << 16); |
| 1191 | else |
| 1192 | cmd->result = |
| 1193 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1194 | cmd->scsi_done(cmd); |
| 1195 | |
| 1196 | /* We are no longer connected to a target - check to see if |
| 1197 | * there are commands waiting to be executed. |
| 1198 | */ |
| 1199 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1200 | wd33c93_execute(instance); |
| 1201 | } else { |
| 1202 | printk |
| 1203 | ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---", |
| 1204 | asr, sr, phs, cmd->pid); |
| 1205 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1206 | } |
| 1207 | break; |
| 1208 | |
| 1209 | /* Note: this interrupt will occur only after a LEVEL2 command */ |
| 1210 | |
| 1211 | case CSR_SDP: |
| 1212 | DB(DB_INTR, printk("SDP")) |
| 1213 | hostdata->state = S_RUNNING_LEVEL2; |
| 1214 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); |
| 1215 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 1216 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1217 | break; |
| 1218 | |
| 1219 | case CSR_XFER_DONE | PHS_MESS_OUT: |
| 1220 | case CSR_UNEXP | PHS_MESS_OUT: |
| 1221 | case CSR_SRV_REQ | PHS_MESS_OUT: |
| 1222 | DB(DB_INTR, printk("MSG_OUT=")) |
| 1223 | |
| 1224 | /* To get here, we've probably requested MESSAGE_OUT and have |
| 1225 | * already put the correct bytes in outgoing_msg[] and filled |
| 1226 | * in outgoing_len. We simply send them out to the SCSI bus. |
| 1227 | * Sometimes we get MESSAGE_OUT phase when we're not expecting |
| 1228 | * it - like when our SDTR message is rejected by a target. Some |
| 1229 | * targets send the REJECT before receiving all of the extended |
| 1230 | * message, and then seem to go back to MESSAGE_OUT for a byte |
| 1231 | * or two. Not sure why, or if I'm doing something wrong to |
| 1232 | * cause this to happen. Regardless, it seems that sending |
| 1233 | * NOP messages in these situations results in no harm and |
| 1234 | * makes everyone happy. |
| 1235 | */ |
| 1236 | if (hostdata->outgoing_len == 0) { |
| 1237 | hostdata->outgoing_len = 1; |
| 1238 | hostdata->outgoing_msg[0] = NOP; |
| 1239 | } |
| 1240 | transfer_pio(regs, hostdata->outgoing_msg, |
| 1241 | hostdata->outgoing_len, DATA_OUT_DIR, hostdata); |
| 1242 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) |
| 1243 | hostdata->outgoing_len = 0; |
| 1244 | hostdata->state = S_CONNECTED; |
| 1245 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1246 | break; |
| 1247 | |
| 1248 | case CSR_UNEXP_DISC: |
| 1249 | |
| 1250 | /* I think I've seen this after a request-sense that was in response |
| 1251 | * to an error condition, but not sure. We certainly need to do |
| 1252 | * something when we get this interrupt - the question is 'what?'. |
| 1253 | * Let's think positively, and assume some command has finished |
| 1254 | * in a legal manner (like a command that provokes a request-sense), |
| 1255 | * so we treat it as a normal command-complete-disconnect. |
| 1256 | */ |
| 1257 | |
| 1258 | /* Make sure that reselection is enabled at this point - it may |
| 1259 | * have been turned off for the command that just completed. |
| 1260 | */ |
| 1261 | |
| 1262 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1263 | if (cmd == NULL) { |
| 1264 | printk(" - Already disconnected! "); |
| 1265 | hostdata->state = S_UNCONNECTED; |
| 1266 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1267 | return; |
| 1268 | } |
| 1269 | DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid)) |
| 1270 | hostdata->connected = NULL; |
| 1271 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1272 | hostdata->state = S_UNCONNECTED; |
| 1273 | if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) |
| 1274 | cmd->result = |
| 1275 | (cmd->result & 0x00ffff) | (DID_ERROR << 16); |
| 1276 | else |
| 1277 | cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1278 | cmd->scsi_done(cmd); |
| 1279 | |
| 1280 | /* We are no longer connected to a target - check to see if |
| 1281 | * there are commands waiting to be executed. |
| 1282 | */ |
| 1283 | /* look above for comments on scsi_done() */ |
| 1284 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1285 | wd33c93_execute(instance); |
| 1286 | break; |
| 1287 | |
| 1288 | case CSR_DISC: |
| 1289 | |
| 1290 | /* Make sure that reselection is enabled at this point - it may |
| 1291 | * have been turned off for the command that just completed. |
| 1292 | */ |
| 1293 | |
| 1294 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); |
| 1295 | DB(DB_INTR, printk("DISC-%ld", cmd->pid)) |
| 1296 | if (cmd == NULL) { |
| 1297 | printk(" - Already disconnected! "); |
| 1298 | hostdata->state = S_UNCONNECTED; |
| 1299 | } |
| 1300 | switch (hostdata->state) { |
| 1301 | case S_PRE_CMP_DISC: |
| 1302 | hostdata->connected = NULL; |
| 1303 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1304 | hostdata->state = S_UNCONNECTED; |
| 1305 | DB(DB_INTR, printk(":%d", cmd->SCp.Status)) |
| 1306 | if (cmd->cmnd[0] == REQUEST_SENSE |
| 1307 | && cmd->SCp.Status != GOOD) |
| 1308 | cmd->result = |
| 1309 | (cmd-> |
| 1310 | result & 0x00ffff) | (DID_ERROR << 16); |
| 1311 | else |
| 1312 | cmd->result = |
| 1313 | cmd->SCp.Status | (cmd->SCp.Message << 8); |
| 1314 | cmd->scsi_done(cmd); |
| 1315 | break; |
| 1316 | case S_PRE_TMP_DISC: |
| 1317 | case S_RUNNING_LEVEL2: |
| 1318 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; |
| 1319 | hostdata->disconnected_Q = cmd; |
| 1320 | hostdata->connected = NULL; |
| 1321 | hostdata->state = S_UNCONNECTED; |
| 1322 | |
| 1323 | #ifdef PROC_STATISTICS |
| 1324 | hostdata->disc_done_cnt[cmd->device->id]++; |
| 1325 | #endif |
| 1326 | |
| 1327 | break; |
| 1328 | default: |
| 1329 | printk("*** Unexpected DISCONNECT interrupt! ***"); |
| 1330 | hostdata->state = S_UNCONNECTED; |
| 1331 | } |
| 1332 | |
| 1333 | /* We are no longer connected to a target - check to see if |
| 1334 | * there are commands waiting to be executed. |
| 1335 | */ |
| 1336 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1337 | wd33c93_execute(instance); |
| 1338 | break; |
| 1339 | |
| 1340 | case CSR_RESEL_AM: |
| 1341 | case CSR_RESEL: |
| 1342 | DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) |
| 1343 | |
| 1344 | /* Old chips (pre -A ???) don't have advanced features and will |
| 1345 | * generate CSR_RESEL. In that case we have to extract the LUN the |
| 1346 | * hard way (see below). |
| 1347 | * First we have to make sure this reselection didn't |
| 1348 | * happen during Arbitration/Selection of some other device. |
| 1349 | * If yes, put losing command back on top of input_Q. |
| 1350 | */ |
| 1351 | if (hostdata->level2 <= L2_NONE) { |
| 1352 | |
| 1353 | if (hostdata->selecting) { |
| 1354 | cmd = (struct scsi_cmnd *) hostdata->selecting; |
| 1355 | hostdata->selecting = NULL; |
| 1356 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1357 | cmd->host_scribble = |
| 1358 | (uchar *) hostdata->input_Q; |
| 1359 | hostdata->input_Q = cmd; |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | else { |
| 1364 | |
| 1365 | if (cmd) { |
| 1366 | if (phs == 0x00) { |
| 1367 | hostdata->busy[cmd->device->id] &= |
| 1368 | ~(1 << cmd->device->lun); |
| 1369 | cmd->host_scribble = |
| 1370 | (uchar *) hostdata->input_Q; |
| 1371 | hostdata->input_Q = cmd; |
| 1372 | } else { |
| 1373 | printk |
| 1374 | ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", |
| 1375 | asr, sr, phs); |
| 1376 | while (1) |
| 1377 | printk("\r"); |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | } |
| 1382 | |
| 1383 | /* OK - find out which device reselected us. */ |
| 1384 | |
| 1385 | id = read_wd33c93(regs, WD_SOURCE_ID); |
| 1386 | id &= SRCID_MASK; |
| 1387 | |
| 1388 | /* and extract the lun from the ID message. (Note that we don't |
| 1389 | * bother to check for a valid message here - I guess this is |
| 1390 | * not the right way to go, but...) |
| 1391 | */ |
| 1392 | |
| 1393 | if (sr == CSR_RESEL_AM) { |
| 1394 | lun = read_wd33c93(regs, WD_DATA); |
| 1395 | if (hostdata->level2 < L2_RESELECT) |
| 1396 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
| 1397 | lun &= 7; |
| 1398 | } else { |
| 1399 | /* Old chip; wait for msgin phase to pick up the LUN. */ |
| 1400 | for (lun = 255; lun; lun--) { |
| 1401 | if ((asr = read_aux_stat(regs)) & ASR_INT) |
| 1402 | break; |
| 1403 | udelay(10); |
| 1404 | } |
| 1405 | if (!(asr & ASR_INT)) { |
| 1406 | printk |
| 1407 | ("wd33c93: Reselected without IDENTIFY\n"); |
| 1408 | lun = 0; |
| 1409 | } else { |
| 1410 | /* Verify this is a change to MSG_IN and read the message */ |
| 1411 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
Roman Zippel | 882905c | 2006-06-23 02:04:57 -0700 | [diff] [blame] | 1412 | udelay(7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | if (sr == (CSR_ABORT | PHS_MESS_IN) || |
| 1414 | sr == (CSR_UNEXP | PHS_MESS_IN) || |
| 1415 | sr == (CSR_SRV_REQ | PHS_MESS_IN)) { |
| 1416 | /* Got MSG_IN, grab target LUN */ |
| 1417 | lun = read_1_byte(regs); |
| 1418 | /* Now we expect a 'paused with ACK asserted' int.. */ |
| 1419 | asr = read_aux_stat(regs); |
| 1420 | if (!(asr & ASR_INT)) { |
| 1421 | udelay(10); |
| 1422 | asr = read_aux_stat(regs); |
| 1423 | if (!(asr & ASR_INT)) |
| 1424 | printk |
| 1425 | ("wd33c93: No int after LUN on RESEL (%02x)\n", |
| 1426 | asr); |
| 1427 | } |
| 1428 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
Roman Zippel | 882905c | 2006-06-23 02:04:57 -0700 | [diff] [blame] | 1429 | udelay(7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | if (sr != CSR_MSGIN) |
| 1431 | printk |
| 1432 | ("wd33c93: Not paused with ACK on RESEL (%02x)\n", |
| 1433 | sr); |
| 1434 | lun &= 7; |
| 1435 | write_wd33c93_cmd(regs, |
| 1436 | WD_CMD_NEGATE_ACK); |
| 1437 | } else { |
| 1438 | printk |
| 1439 | ("wd33c93: Not MSG_IN on reselect (%02x)\n", |
| 1440 | sr); |
| 1441 | lun = 0; |
| 1442 | } |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | /* Now we look for the command that's reconnecting. */ |
| 1447 | |
| 1448 | cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; |
| 1449 | patch = NULL; |
| 1450 | while (cmd) { |
| 1451 | if (id == cmd->device->id && lun == cmd->device->lun) |
| 1452 | break; |
| 1453 | patch = cmd; |
| 1454 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 1455 | } |
| 1456 | |
| 1457 | /* Hmm. Couldn't find a valid command.... What to do? */ |
| 1458 | |
| 1459 | if (!cmd) { |
| 1460 | printk |
| 1461 | ("---TROUBLE: target %d.%d not in disconnect queue---", |
| 1462 | id, lun); |
| 1463 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1464 | return; |
| 1465 | } |
| 1466 | |
| 1467 | /* Ok, found the command - now start it up again. */ |
| 1468 | |
| 1469 | if (patch) |
| 1470 | patch->host_scribble = cmd->host_scribble; |
| 1471 | else |
| 1472 | hostdata->disconnected_Q = |
| 1473 | (struct scsi_cmnd *) cmd->host_scribble; |
| 1474 | hostdata->connected = cmd; |
| 1475 | |
| 1476 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' |
| 1477 | * because these things are preserved over a disconnect. |
| 1478 | * But we DO need to fix the DPD bit so it's correct for this command. |
| 1479 | */ |
| 1480 | |
| 1481 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 1482 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); |
| 1483 | else |
| 1484 | write_wd33c93(regs, WD_DESTINATION_ID, |
| 1485 | cmd->device->id | DSTID_DPD); |
| 1486 | if (hostdata->level2 >= L2_RESELECT) { |
| 1487 | write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ |
| 1488 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); |
| 1489 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); |
| 1490 | hostdata->state = S_RUNNING_LEVEL2; |
| 1491 | } else |
| 1492 | hostdata->state = S_CONNECTED; |
| 1493 | |
| 1494 | DB(DB_INTR, printk("-%ld", cmd->pid)) |
| 1495 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1496 | break; |
| 1497 | |
| 1498 | default: |
| 1499 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); |
| 1500 | spin_unlock_irqrestore(&hostdata->lock, flags); |
| 1501 | } |
| 1502 | |
| 1503 | DB(DB_INTR, printk("} ")) |
| 1504 | |
| 1505 | } |
| 1506 | |
| 1507 | static void |
| 1508 | reset_wd33c93(struct Scsi_Host *instance) |
| 1509 | { |
| 1510 | struct WD33C93_hostdata *hostdata = |
| 1511 | (struct WD33C93_hostdata *) instance->hostdata; |
| 1512 | const wd33c93_regs regs = hostdata->regs; |
| 1513 | uchar sr; |
| 1514 | |
| 1515 | #ifdef CONFIG_SGI_IP22 |
| 1516 | { |
| 1517 | int busycount = 0; |
| 1518 | extern void sgiwd93_reset(unsigned long); |
| 1519 | /* wait 'til the chip gets some time for us */ |
| 1520 | while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) |
| 1521 | udelay (10); |
| 1522 | /* |
| 1523 | * there are scsi devices out there, which manage to lock up |
| 1524 | * the wd33c93 in a busy condition. In this state it won't |
| 1525 | * accept the reset command. The only way to solve this is to |
| 1526 | * give the chip a hardware reset (if possible). The code below |
| 1527 | * does this for the SGI Indy, where this is possible |
| 1528 | */ |
| 1529 | /* still busy ? */ |
| 1530 | if (read_aux_stat(regs) & ASR_BSY) |
| 1531 | sgiwd93_reset(instance->base); /* yeah, give it the hard one */ |
| 1532 | } |
| 1533 | #endif |
| 1534 | |
| 1535 | write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | |
| 1536 | instance->this_id | hostdata->clock_freq); |
| 1537 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1538 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
| 1539 | calc_sync_xfer(hostdata->default_sx_per / 4, |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1540 | DEFAULT_SX_OFF, 0, hostdata->sx_table)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); |
| 1542 | |
| 1543 | |
| 1544 | #ifdef CONFIG_MVME147_SCSI |
| 1545 | udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ |
| 1546 | #endif |
| 1547 | |
| 1548 | while (!(read_aux_stat(regs) & ASR_INT)) |
| 1549 | ; |
| 1550 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1551 | |
| 1552 | hostdata->microcode = read_wd33c93(regs, WD_CDB_1); |
| 1553 | if (sr == 0x00) |
| 1554 | hostdata->chip = C_WD33C93; |
| 1555 | else if (sr == 0x01) { |
| 1556 | write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ |
| 1557 | sr = read_wd33c93(regs, WD_QUEUE_TAG); |
| 1558 | if (sr == 0xa5) { |
| 1559 | hostdata->chip = C_WD33C93B; |
| 1560 | write_wd33c93(regs, WD_QUEUE_TAG, 0); |
| 1561 | } else |
| 1562 | hostdata->chip = C_WD33C93A; |
| 1563 | } else |
| 1564 | hostdata->chip = C_UNKNOWN_CHIP; |
| 1565 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1566 | if (hostdata->chip != C_WD33C93B) /* Fast SCSI unavailable */ |
| 1567 | hostdata->fast = 0; |
| 1568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
| 1570 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1571 | } |
| 1572 | |
| 1573 | int |
| 1574 | wd33c93_host_reset(struct scsi_cmnd * SCpnt) |
| 1575 | { |
| 1576 | struct Scsi_Host *instance; |
| 1577 | struct WD33C93_hostdata *hostdata; |
| 1578 | int i; |
| 1579 | |
| 1580 | instance = SCpnt->device->host; |
| 1581 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1582 | |
| 1583 | printk("scsi%d: reset. ", instance->host_no); |
| 1584 | disable_irq(instance->irq); |
| 1585 | |
| 1586 | hostdata->dma_stop(instance, NULL, 0); |
| 1587 | for (i = 0; i < 8; i++) { |
| 1588 | hostdata->busy[i] = 0; |
| 1589 | hostdata->sync_xfer[i] = |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1590 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
| 1591 | 0, hostdata->sx_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
| 1593 | } |
| 1594 | hostdata->input_Q = NULL; |
| 1595 | hostdata->selecting = NULL; |
| 1596 | hostdata->connected = NULL; |
| 1597 | hostdata->disconnected_Q = NULL; |
| 1598 | hostdata->state = S_UNCONNECTED; |
| 1599 | hostdata->dma = D_DMA_OFF; |
| 1600 | hostdata->incoming_ptr = 0; |
| 1601 | hostdata->outgoing_len = 0; |
| 1602 | |
| 1603 | reset_wd33c93(instance); |
| 1604 | SCpnt->result = DID_RESET << 16; |
| 1605 | enable_irq(instance->irq); |
| 1606 | return SUCCESS; |
| 1607 | } |
| 1608 | |
| 1609 | int |
| 1610 | wd33c93_abort(struct scsi_cmnd * cmd) |
| 1611 | { |
| 1612 | struct Scsi_Host *instance; |
| 1613 | struct WD33C93_hostdata *hostdata; |
| 1614 | wd33c93_regs regs; |
| 1615 | struct scsi_cmnd *tmp, *prev; |
| 1616 | |
| 1617 | disable_irq(cmd->device->host->irq); |
| 1618 | |
| 1619 | instance = cmd->device->host; |
| 1620 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1621 | regs = hostdata->regs; |
| 1622 | |
| 1623 | /* |
| 1624 | * Case 1 : If the command hasn't been issued yet, we simply remove it |
| 1625 | * from the input_Q. |
| 1626 | */ |
| 1627 | |
| 1628 | tmp = (struct scsi_cmnd *) hostdata->input_Q; |
Al Viro | a5d361f | 2006-01-12 01:06:34 -0800 | [diff] [blame] | 1629 | prev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | while (tmp) { |
| 1631 | if (tmp == cmd) { |
| 1632 | if (prev) |
| 1633 | prev->host_scribble = cmd->host_scribble; |
| 1634 | else |
| 1635 | hostdata->input_Q = |
| 1636 | (struct scsi_cmnd *) cmd->host_scribble; |
| 1637 | cmd->host_scribble = NULL; |
| 1638 | cmd->result = DID_ABORT << 16; |
| 1639 | printk |
| 1640 | ("scsi%d: Abort - removing command %ld from input_Q. ", |
| 1641 | instance->host_no, cmd->pid); |
| 1642 | enable_irq(cmd->device->host->irq); |
| 1643 | cmd->scsi_done(cmd); |
| 1644 | return SUCCESS; |
| 1645 | } |
| 1646 | prev = tmp; |
| 1647 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
| 1648 | } |
| 1649 | |
| 1650 | /* |
| 1651 | * Case 2 : If the command is connected, we're going to fail the abort |
| 1652 | * and let the high level SCSI driver retry at a later time or |
| 1653 | * issue a reset. |
| 1654 | * |
| 1655 | * Timeouts, and therefore aborted commands, will be highly unlikely |
| 1656 | * and handling them cleanly in this situation would make the common |
| 1657 | * case of noresets less efficient, and would pollute our code. So, |
| 1658 | * we fail. |
| 1659 | */ |
| 1660 | |
| 1661 | if (hostdata->connected == cmd) { |
| 1662 | uchar sr, asr; |
| 1663 | unsigned long timeout; |
| 1664 | |
| 1665 | printk("scsi%d: Aborting connected command %ld - ", |
| 1666 | instance->host_no, cmd->pid); |
| 1667 | |
| 1668 | printk("stopping DMA - "); |
| 1669 | if (hostdata->dma == D_DMA_RUNNING) { |
| 1670 | hostdata->dma_stop(instance, cmd, 0); |
| 1671 | hostdata->dma = D_DMA_OFF; |
| 1672 | } |
| 1673 | |
| 1674 | printk("sending wd33c93 ABORT command - "); |
| 1675 | write_wd33c93(regs, WD_CONTROL, |
| 1676 | CTRL_IDI | CTRL_EDI | CTRL_POLLED); |
| 1677 | write_wd33c93_cmd(regs, WD_CMD_ABORT); |
| 1678 | |
| 1679 | /* Now we have to attempt to flush out the FIFO... */ |
| 1680 | |
| 1681 | printk("flushing fifo - "); |
| 1682 | timeout = 1000000; |
| 1683 | do { |
| 1684 | asr = read_aux_stat(regs); |
| 1685 | if (asr & ASR_DBR) |
| 1686 | read_wd33c93(regs, WD_DATA); |
| 1687 | } while (!(asr & ASR_INT) && timeout-- > 0); |
| 1688 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1689 | printk |
| 1690 | ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", |
| 1691 | asr, sr, read_wd33c93_count(regs), timeout); |
| 1692 | |
| 1693 | /* |
| 1694 | * Abort command processed. |
| 1695 | * Still connected. |
| 1696 | * We must disconnect. |
| 1697 | */ |
| 1698 | |
| 1699 | printk("sending wd33c93 DISCONNECT command - "); |
| 1700 | write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); |
| 1701 | |
| 1702 | timeout = 1000000; |
| 1703 | asr = read_aux_stat(regs); |
| 1704 | while ((asr & ASR_CIP) && timeout-- > 0) |
| 1705 | asr = read_aux_stat(regs); |
| 1706 | sr = read_wd33c93(regs, WD_SCSI_STATUS); |
| 1707 | printk("asr=%02x, sr=%02x.", asr, sr); |
| 1708 | |
| 1709 | hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun); |
| 1710 | hostdata->connected = NULL; |
| 1711 | hostdata->state = S_UNCONNECTED; |
| 1712 | cmd->result = DID_ABORT << 16; |
| 1713 | |
| 1714 | /* sti();*/ |
| 1715 | wd33c93_execute(instance); |
| 1716 | |
| 1717 | enable_irq(cmd->device->host->irq); |
| 1718 | cmd->scsi_done(cmd); |
| 1719 | return SUCCESS; |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * Case 3: If the command is currently disconnected from the bus, |
| 1724 | * we're not going to expend much effort here: Let's just return |
| 1725 | * an ABORT_SNOOZE and hope for the best... |
| 1726 | */ |
| 1727 | |
| 1728 | tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; |
| 1729 | while (tmp) { |
| 1730 | if (tmp == cmd) { |
| 1731 | printk |
| 1732 | ("scsi%d: Abort - command %ld found on disconnected_Q - ", |
| 1733 | instance->host_no, cmd->pid); |
| 1734 | printk("Abort SNOOZE. "); |
| 1735 | enable_irq(cmd->device->host->irq); |
| 1736 | return FAILED; |
| 1737 | } |
| 1738 | tmp = (struct scsi_cmnd *) tmp->host_scribble; |
| 1739 | } |
| 1740 | |
| 1741 | /* |
| 1742 | * Case 4 : If we reached this point, the command was not found in any of |
| 1743 | * the queues. |
| 1744 | * |
| 1745 | * We probably reached this point because of an unlikely race condition |
| 1746 | * between the command completing successfully and the abortion code, |
| 1747 | * so we won't panic, but we will notify the user in case something really |
| 1748 | * broke. |
| 1749 | */ |
| 1750 | |
| 1751 | /* sti();*/ |
| 1752 | wd33c93_execute(instance); |
| 1753 | |
| 1754 | enable_irq(cmd->device->host->irq); |
| 1755 | printk("scsi%d: warning : SCSI command probably completed successfully" |
| 1756 | " before abortion. ", instance->host_no); |
| 1757 | return FAILED; |
| 1758 | } |
| 1759 | |
| 1760 | #define MAX_WD33C93_HOSTS 4 |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 1761 | #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | #define SETUP_BUFFER_SIZE 200 |
| 1763 | static char setup_buffer[SETUP_BUFFER_SIZE]; |
| 1764 | static char setup_used[MAX_SETUP_ARGS]; |
| 1765 | static int done_setup = 0; |
| 1766 | |
Adrian Bunk | 078dda9 | 2007-07-09 12:00:01 -0700 | [diff] [blame] | 1767 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | wd33c93_setup(char *str) |
| 1769 | { |
| 1770 | int i; |
| 1771 | char *p1, *p2; |
| 1772 | |
| 1773 | /* The kernel does some processing of the command-line before calling |
| 1774 | * this function: If it begins with any decimal or hex number arguments, |
| 1775 | * ints[0] = how many numbers found and ints[1] through [n] are the values |
| 1776 | * themselves. str points to where the non-numeric arguments (if any) |
| 1777 | * start: We do our own parsing of those. We construct synthetic 'nosync' |
| 1778 | * keywords out of numeric args (to maintain compatibility with older |
| 1779 | * versions) and then add the rest of the arguments. |
| 1780 | */ |
| 1781 | |
| 1782 | p1 = setup_buffer; |
| 1783 | *p1 = '\0'; |
| 1784 | if (str) |
| 1785 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); |
| 1786 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; |
| 1787 | p1 = setup_buffer; |
| 1788 | i = 0; |
| 1789 | while (*p1 && (i < MAX_SETUP_ARGS)) { |
| 1790 | p2 = strchr(p1, ','); |
| 1791 | if (p2) { |
| 1792 | *p2 = '\0'; |
| 1793 | if (p1 != p2) |
| 1794 | setup_args[i] = p1; |
| 1795 | p1 = p2 + 1; |
| 1796 | i++; |
| 1797 | } else { |
| 1798 | setup_args[i] = p1; |
| 1799 | break; |
| 1800 | } |
| 1801 | } |
| 1802 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
| 1803 | setup_used[i] = 0; |
| 1804 | done_setup = 1; |
| 1805 | |
| 1806 | return 1; |
| 1807 | } |
| 1808 | __setup("wd33c93=", wd33c93_setup); |
| 1809 | |
| 1810 | /* check_setup_args() returns index if key found, 0 if not |
| 1811 | */ |
| 1812 | static int |
| 1813 | check_setup_args(char *key, int *flags, int *val, char *buf) |
| 1814 | { |
| 1815 | int x; |
| 1816 | char *cp; |
| 1817 | |
| 1818 | for (x = 0; x < MAX_SETUP_ARGS; x++) { |
| 1819 | if (setup_used[x]) |
| 1820 | continue; |
| 1821 | if (!strncmp(setup_args[x], key, strlen(key))) |
| 1822 | break; |
| 1823 | if (!strncmp(setup_args[x], "next", strlen("next"))) |
| 1824 | return 0; |
| 1825 | } |
| 1826 | if (x == MAX_SETUP_ARGS) |
| 1827 | return 0; |
| 1828 | setup_used[x] = 1; |
| 1829 | cp = setup_args[x] + strlen(key); |
| 1830 | *val = -1; |
| 1831 | if (*cp != ':') |
| 1832 | return ++x; |
| 1833 | cp++; |
| 1834 | if ((*cp >= '0') && (*cp <= '9')) { |
| 1835 | *val = simple_strtoul(cp, NULL, 0); |
| 1836 | } |
| 1837 | return ++x; |
| 1838 | } |
| 1839 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1840 | /* |
| 1841 | * Calculate internal data-transfer-clock cycle from input-clock |
| 1842 | * frequency (/MHz) and fill 'sx_table'. |
| 1843 | * |
| 1844 | * The original driver used to rely on a fixed sx_table, containing periods |
| 1845 | * for (only) the lower limits of the respective input-clock-frequency ranges |
| 1846 | * (8-10/12-15/16-20 MHz). Although it seems, that no problems ocurred with |
| 1847 | * this setting so far, it might be desirable to adjust the transfer periods |
| 1848 | * closer to the really attached, possibly 25% higher, input-clock, since |
| 1849 | * - the wd33c93 may really use a significant shorter period, than it has |
| 1850 | * negotiated (eg. thrashing the target, which expects 4/8MHz, with 5/10MHz |
| 1851 | * instead). |
| 1852 | * - the wd33c93 may ask the target for a lower transfer rate, than the target |
| 1853 | * is capable of (eg. negotiating for an assumed minimum of 252ns instead of |
| 1854 | * possible 200ns, which indeed shows up in tests as an approx. 10% lower |
| 1855 | * transfer rate). |
| 1856 | */ |
| 1857 | static inline unsigned int |
| 1858 | round_4(unsigned int x) |
| 1859 | { |
| 1860 | switch (x & 3) { |
| 1861 | case 1: --x; |
| 1862 | break; |
| 1863 | case 2: ++x; |
| 1864 | case 3: ++x; |
| 1865 | } |
| 1866 | return x; |
| 1867 | } |
| 1868 | |
| 1869 | static void |
| 1870 | calc_sx_table(unsigned int mhz, struct sx_period sx_table[9]) |
| 1871 | { |
| 1872 | unsigned int d, i; |
| 1873 | if (mhz < 11) |
| 1874 | d = 2; /* divisor for 8-10 MHz input-clock */ |
| 1875 | else if (mhz < 16) |
| 1876 | d = 3; /* divisor for 12-15 MHz input-clock */ |
| 1877 | else |
| 1878 | d = 4; /* divisor for 16-20 MHz input-clock */ |
| 1879 | |
| 1880 | d = (100000 * d) / 2 / mhz; /* 100 x DTCC / nanosec */ |
| 1881 | |
| 1882 | sx_table[0].period_ns = 1; |
| 1883 | sx_table[0].reg_value = 0x20; |
| 1884 | for (i = 1; i < 8; i++) { |
| 1885 | sx_table[i].period_ns = round_4((i+1)*d / 100); |
| 1886 | sx_table[i].reg_value = (i+1)*0x10; |
| 1887 | } |
| 1888 | sx_table[7].reg_value = 0; |
| 1889 | sx_table[8].period_ns = 0; |
| 1890 | sx_table[8].reg_value = 0; |
| 1891 | } |
| 1892 | |
| 1893 | /* |
| 1894 | * check and, maybe, map an init- or "clock:"- argument. |
| 1895 | */ |
| 1896 | static uchar |
| 1897 | set_clk_freq(int freq, int *mhz) |
| 1898 | { |
| 1899 | int x = freq; |
| 1900 | if (WD33C93_FS_8_10 == freq) |
| 1901 | freq = 8; |
| 1902 | else if (WD33C93_FS_12_15 == freq) |
| 1903 | freq = 12; |
| 1904 | else if (WD33C93_FS_16_20 == freq) |
| 1905 | freq = 16; |
| 1906 | else if (freq > 7 && freq < 11) |
| 1907 | x = WD33C93_FS_8_10; |
| 1908 | else if (freq > 11 && freq < 16) |
| 1909 | x = WD33C93_FS_12_15; |
| 1910 | else if (freq > 15 && freq < 21) |
| 1911 | x = WD33C93_FS_16_20; |
| 1912 | else { |
| 1913 | /* Hmm, wouldn't it be safer to assume highest freq here? */ |
| 1914 | x = WD33C93_FS_8_10; |
| 1915 | freq = 8; |
| 1916 | } |
| 1917 | *mhz = freq; |
| 1918 | return x; |
| 1919 | } |
| 1920 | |
| 1921 | /* |
| 1922 | * to be used with the resync: fast: ... options |
| 1923 | */ |
| 1924 | static inline void set_resync ( struct WD33C93_hostdata *hd, int mask ) |
| 1925 | { |
| 1926 | int i; |
| 1927 | for (i = 0; i < 8; i++) |
| 1928 | if (mask & (1 << i)) |
| 1929 | hd->sync_stat[i] = SS_UNSET; |
| 1930 | } |
| 1931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | void |
| 1933 | wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, |
| 1934 | dma_setup_t setup, dma_stop_t stop, int clock_freq) |
| 1935 | { |
| 1936 | struct WD33C93_hostdata *hostdata; |
| 1937 | int i; |
| 1938 | int flags; |
| 1939 | int val; |
| 1940 | char buf[32]; |
| 1941 | |
| 1942 | if (!done_setup && setup_strings) |
| 1943 | wd33c93_setup(setup_strings); |
| 1944 | |
| 1945 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
| 1946 | |
| 1947 | hostdata->regs = regs; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1948 | hostdata->clock_freq = set_clk_freq(clock_freq, &i); |
| 1949 | calc_sx_table(i, hostdata->sx_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | hostdata->dma_setup = setup; |
| 1951 | hostdata->dma_stop = stop; |
| 1952 | hostdata->dma_bounce_buffer = NULL; |
| 1953 | hostdata->dma_bounce_len = 0; |
| 1954 | for (i = 0; i < 8; i++) { |
| 1955 | hostdata->busy[i] = 0; |
| 1956 | hostdata->sync_xfer[i] = |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1957 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
| 1958 | 0, hostdata->sx_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
| 1960 | #ifdef PROC_STATISTICS |
| 1961 | hostdata->cmd_cnt[i] = 0; |
| 1962 | hostdata->disc_allowed_cnt[i] = 0; |
| 1963 | hostdata->disc_done_cnt[i] = 0; |
| 1964 | #endif |
| 1965 | } |
| 1966 | hostdata->input_Q = NULL; |
| 1967 | hostdata->selecting = NULL; |
| 1968 | hostdata->connected = NULL; |
| 1969 | hostdata->disconnected_Q = NULL; |
| 1970 | hostdata->state = S_UNCONNECTED; |
| 1971 | hostdata->dma = D_DMA_OFF; |
| 1972 | hostdata->level2 = L2_BASIC; |
| 1973 | hostdata->disconnect = DIS_ADAPTIVE; |
| 1974 | hostdata->args = DEBUG_DEFAULTS; |
| 1975 | hostdata->incoming_ptr = 0; |
| 1976 | hostdata->outgoing_len = 0; |
| 1977 | hostdata->default_sx_per = DEFAULT_SX_PER; |
| 1978 | hostdata->no_sync = 0xff; /* sync defaults to off */ |
| 1979 | hostdata->no_dma = 0; /* default is DMA enabled */ |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1980 | hostdata->fast = 0; /* default is Fast SCSI transfers disabled */ |
| 1981 | hostdata->dma_mode = CTRL_DMA; /* default is Single Byte DMA */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | |
| 1983 | #ifdef PROC_INTERFACE |
| 1984 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | |
| 1985 | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; |
| 1986 | #ifdef PROC_STATISTICS |
| 1987 | hostdata->dma_cnt = 0; |
| 1988 | hostdata->pio_cnt = 0; |
| 1989 | hostdata->int_cnt = 0; |
| 1990 | #endif |
| 1991 | #endif |
| 1992 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 1993 | if (check_setup_args("clock", &flags, &val, buf)) { |
| 1994 | hostdata->clock_freq = set_clk_freq(val, &val); |
| 1995 | calc_sx_table(val, hostdata->sx_table); |
| 1996 | } |
| 1997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | if (check_setup_args("nosync", &flags, &val, buf)) |
| 1999 | hostdata->no_sync = val; |
| 2000 | |
| 2001 | if (check_setup_args("nodma", &flags, &val, buf)) |
| 2002 | hostdata->no_dma = (val == -1) ? 1 : val; |
| 2003 | |
| 2004 | if (check_setup_args("period", &flags, &val, buf)) |
| 2005 | hostdata->default_sx_per = |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2006 | hostdata->sx_table[round_period((unsigned int) val, |
| 2007 | hostdata->sx_table)].period_ns; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | |
| 2009 | if (check_setup_args("disconnect", &flags, &val, buf)) { |
| 2010 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) |
| 2011 | hostdata->disconnect = val; |
| 2012 | else |
| 2013 | hostdata->disconnect = DIS_ADAPTIVE; |
| 2014 | } |
| 2015 | |
| 2016 | if (check_setup_args("level2", &flags, &val, buf)) |
| 2017 | hostdata->level2 = val; |
| 2018 | |
| 2019 | if (check_setup_args("debug", &flags, &val, buf)) |
| 2020 | hostdata->args = val & DB_MASK; |
| 2021 | |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2022 | if (check_setup_args("burst", &flags, &val, buf)) |
| 2023 | hostdata->dma_mode = val ? CTRL_BURST:CTRL_DMA; |
| 2024 | |
| 2025 | if (WD33C93_FS_16_20 == hostdata->clock_freq /* divisor 4 */ |
| 2026 | && check_setup_args("fast", &flags, &val, buf)) |
| 2027 | hostdata->fast = !!val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | |
| 2029 | if ((i = check_setup_args("next", &flags, &val, buf))) { |
| 2030 | while (i) |
| 2031 | setup_used[--i] = 1; |
| 2032 | } |
| 2033 | #ifdef PROC_INTERFACE |
| 2034 | if (check_setup_args("proc", &flags, &val, buf)) |
| 2035 | hostdata->proc = val; |
| 2036 | #endif |
| 2037 | |
| 2038 | spin_lock_irq(&hostdata->lock); |
| 2039 | reset_wd33c93(instance); |
| 2040 | spin_unlock_irq(&hostdata->lock); |
| 2041 | |
| 2042 | printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", |
| 2043 | instance->host_no, |
| 2044 | (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == |
| 2045 | C_WD33C93A) ? |
| 2046 | "WD33c93A" : (hostdata->chip == |
| 2047 | C_WD33C93B) ? "WD33c93B" : "unknown", |
| 2048 | hostdata->microcode, hostdata->no_sync, hostdata->no_dma); |
| 2049 | #ifdef DEBUGGING_ON |
| 2050 | printk(" debug_flags=0x%02x\n", hostdata->args); |
| 2051 | #else |
| 2052 | printk(" debugging=OFF\n"); |
| 2053 | #endif |
| 2054 | printk(" setup_args="); |
| 2055 | for (i = 0; i < MAX_SETUP_ARGS; i++) |
| 2056 | printk("%s,", setup_args[i]); |
| 2057 | printk("\n"); |
| 2058 | printk(" Version %s - %s, Compiled %s at %s\n", |
| 2059 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
| 2060 | } |
| 2061 | |
| 2062 | int |
| 2063 | wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in) |
| 2064 | { |
| 2065 | |
| 2066 | #ifdef PROC_INTERFACE |
| 2067 | |
| 2068 | char *bp; |
| 2069 | char tbuf[128]; |
| 2070 | struct WD33C93_hostdata *hd; |
| 2071 | struct scsi_cmnd *cmd; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2072 | int x; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | static int stop = 0; |
| 2074 | |
| 2075 | hd = (struct WD33C93_hostdata *) instance->hostdata; |
| 2076 | |
| 2077 | /* If 'in' is TRUE we need to _read_ the proc file. We accept the following |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2078 | * keywords (same format as command-line, but arguments are not optional): |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | * debug |
| 2080 | * disconnect |
| 2081 | * period |
| 2082 | * resync |
| 2083 | * proc |
| 2084 | * nodma |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2085 | * level2 |
| 2086 | * burst |
| 2087 | * fast |
| 2088 | * nosync |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | */ |
| 2090 | |
| 2091 | if (in) { |
| 2092 | buf[len] = '\0'; |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2093 | for (bp = buf; *bp; ) { |
| 2094 | while (',' == *bp || ' ' == *bp) |
| 2095 | ++bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | if (!strncmp(bp, "debug:", 6)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2097 | hd->args = simple_strtoul(bp+6, &bp, 0) & DB_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | } else if (!strncmp(bp, "disconnect:", 11)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2099 | x = simple_strtoul(bp+11, &bp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | if (x < DIS_NEVER || x > DIS_ALWAYS) |
| 2101 | x = DIS_ADAPTIVE; |
| 2102 | hd->disconnect = x; |
| 2103 | } else if (!strncmp(bp, "period:", 7)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2104 | x = simple_strtoul(bp+7, &bp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | hd->default_sx_per = |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2106 | hd->sx_table[round_period((unsigned int) x, |
| 2107 | hd->sx_table)].period_ns; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | } else if (!strncmp(bp, "resync:", 7)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2109 | set_resync(hd, (int)simple_strtoul(bp+7, &bp, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | } else if (!strncmp(bp, "proc:", 5)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2111 | hd->proc = simple_strtoul(bp+5, &bp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | } else if (!strncmp(bp, "nodma:", 6)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2113 | hd->no_dma = simple_strtoul(bp+6, &bp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | } else if (!strncmp(bp, "level2:", 7)) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2115 | hd->level2 = simple_strtoul(bp+7, &bp, 0); |
| 2116 | } else if (!strncmp(bp, "burst:", 6)) { |
| 2117 | hd->dma_mode = |
| 2118 | simple_strtol(bp+6, &bp, 0) ? CTRL_BURST:CTRL_DMA; |
| 2119 | } else if (!strncmp(bp, "fast:", 5)) { |
| 2120 | x = !!simple_strtol(bp+5, &bp, 0); |
| 2121 | if (x != hd->fast) |
| 2122 | set_resync(hd, 0xff); |
| 2123 | hd->fast = x; |
| 2124 | } else if (!strncmp(bp, "nosync:", 7)) { |
| 2125 | x = simple_strtoul(bp+7, &bp, 0); |
| 2126 | set_resync(hd, x ^ hd->no_sync); |
| 2127 | hd->no_sync = x; |
| 2128 | } else { |
| 2129 | break; /* unknown keyword,syntax-error,... */ |
| 2130 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | } |
| 2132 | return len; |
| 2133 | } |
| 2134 | |
| 2135 | spin_lock_irq(&hd->lock); |
| 2136 | bp = buf; |
| 2137 | *bp = '\0'; |
| 2138 | if (hd->proc & PR_VERSION) { |
| 2139 | sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s", |
| 2140 | WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__); |
| 2141 | strcat(bp, tbuf); |
| 2142 | } |
| 2143 | if (hd->proc & PR_INFO) { |
peter fuerst | a5d8421 | 2007-02-12 15:20:15 +0100 | [diff] [blame] | 2144 | sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d" |
| 2145 | " dma_mode=%02x fast=%d", |
| 2146 | hd->clock_freq, hd->no_sync, hd->no_dma, hd->dma_mode, hd->fast); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | strcat(bp, tbuf); |
| 2148 | strcat(bp, "\nsync_xfer[] = "); |
| 2149 | for (x = 0; x < 7; x++) { |
| 2150 | sprintf(tbuf, "\t%02x", hd->sync_xfer[x]); |
| 2151 | strcat(bp, tbuf); |
| 2152 | } |
| 2153 | strcat(bp, "\nsync_stat[] = "); |
| 2154 | for (x = 0; x < 7; x++) { |
| 2155 | sprintf(tbuf, "\t%02x", hd->sync_stat[x]); |
| 2156 | strcat(bp, tbuf); |
| 2157 | } |
| 2158 | } |
| 2159 | #ifdef PROC_STATISTICS |
| 2160 | if (hd->proc & PR_STATISTICS) { |
| 2161 | strcat(bp, "\ncommands issued: "); |
| 2162 | for (x = 0; x < 7; x++) { |
| 2163 | sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]); |
| 2164 | strcat(bp, tbuf); |
| 2165 | } |
| 2166 | strcat(bp, "\ndisconnects allowed:"); |
| 2167 | for (x = 0; x < 7; x++) { |
| 2168 | sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]); |
| 2169 | strcat(bp, tbuf); |
| 2170 | } |
| 2171 | strcat(bp, "\ndisconnects done: "); |
| 2172 | for (x = 0; x < 7; x++) { |
| 2173 | sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]); |
| 2174 | strcat(bp, tbuf); |
| 2175 | } |
| 2176 | sprintf(tbuf, |
| 2177 | "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", |
| 2178 | hd->int_cnt, hd->dma_cnt, hd->pio_cnt); |
| 2179 | strcat(bp, tbuf); |
| 2180 | } |
| 2181 | #endif |
| 2182 | if (hd->proc & PR_CONNECTED) { |
| 2183 | strcat(bp, "\nconnected: "); |
| 2184 | if (hd->connected) { |
| 2185 | cmd = (struct scsi_cmnd *) hd->connected; |
| 2186 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2187 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2188 | strcat(bp, tbuf); |
| 2189 | } |
| 2190 | } |
| 2191 | if (hd->proc & PR_INPUTQ) { |
| 2192 | strcat(bp, "\ninput_Q: "); |
| 2193 | cmd = (struct scsi_cmnd *) hd->input_Q; |
| 2194 | while (cmd) { |
| 2195 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2196 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2197 | strcat(bp, tbuf); |
| 2198 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 2199 | } |
| 2200 | } |
| 2201 | if (hd->proc & PR_DISCQ) { |
| 2202 | strcat(bp, "\ndisconnected_Q:"); |
| 2203 | cmd = (struct scsi_cmnd *) hd->disconnected_Q; |
| 2204 | while (cmd) { |
| 2205 | sprintf(tbuf, " %ld-%d:%d(%02x)", |
| 2206 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 2207 | strcat(bp, tbuf); |
| 2208 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
| 2209 | } |
| 2210 | } |
| 2211 | strcat(bp, "\n"); |
| 2212 | spin_unlock_irq(&hd->lock); |
| 2213 | *start = buf; |
| 2214 | if (stop) { |
| 2215 | stop = 0; |
| 2216 | return 0; |
| 2217 | } |
| 2218 | if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ |
| 2219 | stop = 1; |
| 2220 | if (hd->proc & PR_STOP) /* stop every other time */ |
| 2221 | stop = 1; |
| 2222 | return strlen(bp); |
| 2223 | |
| 2224 | #else /* PROC_INTERFACE */ |
| 2225 | |
| 2226 | return 0; |
| 2227 | |
| 2228 | #endif /* PROC_INTERFACE */ |
| 2229 | |
| 2230 | } |
| 2231 | |
| 2232 | void |
| 2233 | wd33c93_release(void) |
| 2234 | { |
| 2235 | } |
| 2236 | |
| 2237 | EXPORT_SYMBOL(wd33c93_host_reset); |
| 2238 | EXPORT_SYMBOL(wd33c93_init); |
| 2239 | EXPORT_SYMBOL(wd33c93_release); |
| 2240 | EXPORT_SYMBOL(wd33c93_abort); |
| 2241 | EXPORT_SYMBOL(wd33c93_queuecommand); |
| 2242 | EXPORT_SYMBOL(wd33c93_intr); |
| 2243 | EXPORT_SYMBOL(wd33c93_proc_info); |