1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/acorn/scsi/fas216.c 4 * 5 * Copyright (C) 1997-2003 Russell King 6 * 7 * Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and 8 * other sources, including: 9 * the AMD Am53CF94 data sheet 10 * the AMD Am53C94 data sheet 11 * 12 * This is a generic driver. To use it, have a look at cumana_2.c. You 13 * should define your own structure that overlays FAS216_Info, eg: 14 * struct my_host_data { 15 * FAS216_Info info; 16 * ... my host specific data ... 17 * }; 18 * 19 * Changelog: 20 * 30-08-1997 RMK Created 21 * 14-09-1997 RMK Started disconnect support 22 * 08-02-1998 RMK Corrected real DMA support 23 * 15-02-1998 RMK Started sync xfer support 24 * 06-04-1998 RMK Tightened conditions for printing incomplete 25 * transfers 26 * 02-05-1998 RMK Added extra checks in fas216_reset 27 * 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns 28 * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h 29 * 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT 30 * 02-04-2000 RMK Converted to use the new error handling, and 31 * automatically request sense data upon check 32 * condition status from targets. 33 */ 34 #include <linux/module.h> 35 #include <linux/blkdev.h> 36 #include <linux/kernel.h> 37 #include <linux/string.h> 38 #include <linux/ioport.h> 39 #include <linux/proc_fs.h> 40 #include <linux/delay.h> 41 #include <linux/bitops.h> 42 #include <linux/init.h> 43 #include <linux/interrupt.h> 44 45 #include <asm/dma.h> 46 #include <asm/io.h> 47 #include <asm/irq.h> 48 #include <asm/ecard.h> 49 50 #include "../scsi.h" 51 #include <scsi/scsi_dbg.h> 52 #include <scsi/scsi_host.h> 53 #include "fas216.h" 54 #include "scsi.h" 55 56 /* NOTE: SCSI2 Synchronous transfers *require* DMA according to 57 * the data sheet. This restriction is crazy, especially when 58 * you only want to send 16 bytes! What were the guys who 59 * designed this chip on at that time? Did they read the SCSI2 60 * spec at all? The following sections are taken from the SCSI2 61 * standard (s2r10) concerning this: 62 * 63 * > IMPLEMENTORS NOTES: 64 * > (1) Re-negotiation at every selection is not recommended, since a 65 * > significant performance impact is likely. 66 * 67 * > The implied synchronous agreement shall remain in effect until a BUS DEVICE 68 * > RESET message is received, until a hard reset condition occurs, or until one 69 * > of the two SCSI devices elects to modify the agreement. The default data 70 * > transfer mode is asynchronous data transfer mode. The default data transfer 71 * > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard 72 * > reset condition. 73 * 74 * In total, this means that once you have elected to use synchronous 75 * transfers, you must always use DMA. 76 * 77 * I was thinking that this was a good chip until I found this restriction ;( 78 */ 79 #define SCSI2_SYNC 80 #undef SCSI2_TAG 81 82 #undef DEBUG_CONNECT 83 #undef DEBUG_MESSAGES 84 85 #undef CHECK_STRUCTURE 86 87 #define LOG_CONNECT (1 << 0) 88 #define LOG_BUSSERVICE (1 << 1) 89 #define LOG_FUNCTIONDONE (1 << 2) 90 #define LOG_MESSAGES (1 << 3) 91 #define LOG_BUFFER (1 << 4) 92 #define LOG_ERROR (1 << 8) 93 94 static int level_mask = LOG_ERROR; 95 96 module_param(level_mask, int, 0644); 97 98 #ifndef MODULE 99 static int __init fas216_log_setup(char *str) 100 { 101 char *s; 102 103 level_mask = 0; 104 105 while ((s = strsep(&str, ",")) != NULL) { 106 switch (s[0]) { 107 case 'a': 108 if (strcmp(s, "all") == 0) 109 level_mask |= -1; 110 break; 111 case 'b': 112 if (strncmp(s, "bus", 3) == 0) 113 level_mask |= LOG_BUSSERVICE; 114 if (strncmp(s, "buf", 3) == 0) 115 level_mask |= LOG_BUFFER; 116 break; 117 case 'c': 118 level_mask |= LOG_CONNECT; 119 break; 120 case 'e': 121 level_mask |= LOG_ERROR; 122 break; 123 case 'm': 124 level_mask |= LOG_MESSAGES; 125 break; 126 case 'n': 127 if (strcmp(s, "none") == 0) 128 level_mask = 0; 129 break; 130 case 's': 131 level_mask |= LOG_FUNCTIONDONE; 132 break; 133 } 134 } 135 return 1; 136 } 137 138 __setup("fas216_logging=", fas216_log_setup); 139 #endif 140 141 static inline unsigned char fas216_readb(FAS216_Info *info, unsigned int reg) 142 { 143 unsigned int off = reg << info->scsi.io_shift; 144 return readb(info->scsi.io_base + off); 145 } 146 147 static inline void fas216_writeb(FAS216_Info *info, unsigned int reg, unsigned int val) 148 { 149 unsigned int off = reg << info->scsi.io_shift; 150 writeb(val, info->scsi.io_base + off); 151 } 152 153 static void fas216_dumpstate(FAS216_Info *info) 154 { 155 unsigned char is, stat, inst; 156 157 is = fas216_readb(info, REG_IS); 158 stat = fas216_readb(info, REG_STAT); 159 inst = fas216_readb(info, REG_INST); 160 161 printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X" 162 " INST=%02X IS=%02X CFIS=%02X", 163 fas216_readb(info, REG_CTCL), 164 fas216_readb(info, REG_CTCM), 165 fas216_readb(info, REG_CMD), stat, inst, is, 166 fas216_readb(info, REG_CFIS)); 167 printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02X\n", 168 fas216_readb(info, REG_CNTL1), 169 fas216_readb(info, REG_CNTL2), 170 fas216_readb(info, REG_CNTL3), 171 fas216_readb(info, REG_CTCH)); 172 } 173 174 static void print_SCp(struct scsi_pointer *SCp, const char *prefix, const char *suffix) 175 { 176 printk("%sptr %p this_residual 0x%x buffer %p buffers_residual 0x%x%s", 177 prefix, SCp->ptr, SCp->this_residual, SCp->buffer, 178 SCp->buffers_residual, suffix); 179 } 180 181 #ifdef CHECK_STRUCTURE 182 static void fas216_dumpinfo(FAS216_Info *info) 183 { 184 static int used = 0; 185 int i; 186 187 if (used++) 188 return; 189 190 printk("FAS216_Info=\n"); 191 printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%p\n", 192 info->magic_start, info->host, info->SCpnt, 193 info->origSCpnt); 194 printk(" scsi={ io_shift=%X irq=%X cfg={ %X %X %X %X }\n", 195 info->scsi.io_shift, info->scsi.irq, 196 info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2], 197 info->scsi.cfg[3]); 198 printk(" type=%p phase=%X\n", 199 info->scsi.type, info->scsi.phase); 200 print_SCp(&info->scsi.SCp, " SCp={ ", " }\n"); 201 printk(" msgs async_stp=%X disconnectable=%d aborting=%d }\n", 202 info->scsi.async_stp, 203 info->scsi.disconnectable, info->scsi.aborting); 204 printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%X\n" 205 " disconnects=%X aborts=%X bus_resets=%X host_resets=%X}\n", 206 info->stats.queues, info->stats.removes, info->stats.fins, 207 info->stats.reads, info->stats.writes, info->stats.miscs, 208 info->stats.disconnects, info->stats.aborts, info->stats.bus_resets, 209 info->stats.host_resets); 210 printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }\n", 211 info->ifcfg.clockrate, info->ifcfg.select_timeout, 212 info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth); 213 for (i = 0; i < 8; i++) { 214 printk(" busyluns[%d]=%08lx dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }\n", 215 i, info->busyluns[i], i, 216 info->device[i].disconnect_ok, info->device[i].stp, 217 info->device[i].sof, info->device[i].sync_state); 218 } 219 printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }\n", 220 info->dma.transfer_type, info->dma.setup, 221 info->dma.pseudo, info->dma.stop); 222 printk(" internal_done=%X magic_end=%lX }\n", 223 info->internal_done, info->magic_end); 224 } 225 226 static void __fas216_checkmagic(FAS216_Info *info, const char *func) 227 { 228 int corruption = 0; 229 if (info->magic_start != MAGIC) { 230 printk(KERN_CRIT "FAS216 Error: magic at start corrupted\n"); 231 corruption++; 232 } 233 if (info->magic_end != MAGIC) { 234 printk(KERN_CRIT "FAS216 Error: magic at end corrupted\n"); 235 corruption++; 236 } 237 if (corruption) { 238 fas216_dumpinfo(info); 239 panic("scsi memory space corrupted in %s", func); 240 } 241 } 242 #define fas216_checkmagic(info) __fas216_checkmagic((info), __func__) 243 #else 244 #define fas216_checkmagic(info) 245 #endif 246 247 static const char *fas216_bus_phase(int stat) 248 { 249 static const char *phases[] = { 250 "DATA OUT", "DATA IN", 251 "COMMAND", "STATUS", 252 "MISC OUT", "MISC IN", 253 "MESG OUT", "MESG IN" 254 }; 255 256 return phases[stat & STAT_BUSMASK]; 257 } 258 259 static const char *fas216_drv_phase(FAS216_Info *info) 260 { 261 static const char *phases[] = { 262 [PHASE_IDLE] = "idle", 263 [PHASE_SELECTION] = "selection", 264 [PHASE_COMMAND] = "command", 265 [PHASE_DATAOUT] = "data out", 266 [PHASE_DATAIN] = "data in", 267 [PHASE_MSGIN] = "message in", 268 [PHASE_MSGIN_DISCONNECT]= "disconnect", 269 [PHASE_MSGOUT_EXPECT] = "expect message out", 270 [PHASE_MSGOUT] = "message out", 271 [PHASE_STATUS] = "status", 272 [PHASE_DONE] = "done", 273 }; 274 275 if (info->scsi.phase < ARRAY_SIZE(phases) && 276 phases[info->scsi.phase]) 277 return phases[info->scsi.phase]; 278 return "???"; 279 } 280 281 static char fas216_target(FAS216_Info *info) 282 { 283 if (info->SCpnt) 284 return '0' + info->SCpnt->device->id; 285 else 286 return 'H'; 287 } 288 289 static void 290 fas216_do_log(FAS216_Info *info, char target, char *fmt, va_list ap) 291 { 292 static char buf[1024]; 293 294 vsnprintf(buf, sizeof(buf), fmt, ap); 295 printk("scsi%d.%c: %s", info->host->host_no, target, buf); 296 } 297 298 static void fas216_log_command(FAS216_Info *info, int level, 299 struct scsi_cmnd *SCpnt, char *fmt, ...) 300 { 301 va_list args; 302 303 if (level != 0 && !(level & level_mask)) 304 return; 305 306 va_start(args, fmt); 307 fas216_do_log(info, '0' + SCpnt->device->id, fmt, args); 308 va_end(args); 309 310 scsi_print_command(SCpnt); 311 } 312 313 static void 314 fas216_log_target(FAS216_Info *info, int level, int target, char *fmt, ...) 315 { 316 va_list args; 317 318 if (level != 0 && !(level & level_mask)) 319 return; 320 321 if (target < 0) 322 target = 'H'; 323 else 324 target += '0'; 325 326 va_start(args, fmt); 327 fas216_do_log(info, target, fmt, args); 328 va_end(args); 329 330 printk("\n"); 331 } 332 333 static void fas216_log(FAS216_Info *info, int level, char *fmt, ...) 334 { 335 va_list args; 336 337 if (level != 0 && !(level & level_mask)) 338 return; 339 340 va_start(args, fmt); 341 fas216_do_log(info, fas216_target(info), fmt, args); 342 va_end(args); 343 344 printk("\n"); 345 } 346 347 #define PH_SIZE 32 348 349 static struct { int stat, ssr, isr, ph; } ph_list[PH_SIZE]; 350 static int ph_ptr; 351 352 static void add_debug_list(int stat, int ssr, int isr, int ph) 353 { 354 ph_list[ph_ptr].stat = stat; 355 ph_list[ph_ptr].ssr = ssr; 356 ph_list[ph_ptr].isr = isr; 357 ph_list[ph_ptr].ph = ph; 358 359 ph_ptr = (ph_ptr + 1) & (PH_SIZE-1); 360 } 361 362 static struct { int command; void *from; } cmd_list[8]; 363 static int cmd_ptr; 364 365 static void fas216_cmd(FAS216_Info *info, unsigned int command) 366 { 367 cmd_list[cmd_ptr].command = command; 368 cmd_list[cmd_ptr].from = __builtin_return_address(0); 369 370 cmd_ptr = (cmd_ptr + 1) & 7; 371 372 fas216_writeb(info, REG_CMD, command); 373 } 374 375 static void print_debug_list(void) 376 { 377 int i; 378 379 i = ph_ptr; 380 381 printk(KERN_ERR "SCSI IRQ trail\n"); 382 do { 383 printk(" %02x:%02x:%02x:%1x", 384 ph_list[i].stat, ph_list[i].ssr, 385 ph_list[i].isr, ph_list[i].ph); 386 i = (i + 1) & (PH_SIZE - 1); 387 if (((i ^ ph_ptr) & 7) == 0) 388 printk("\n"); 389 } while (i != ph_ptr); 390 if ((i ^ ph_ptr) & 7) 391 printk("\n"); 392 393 i = cmd_ptr; 394 printk(KERN_ERR "FAS216 commands: "); 395 do { 396 printk("%02x:%p ", cmd_list[i].command, cmd_list[i].from); 397 i = (i + 1) & 7; 398 } while (i != cmd_ptr); 399 printk("\n"); 400 } 401 402 static void fas216_done(FAS216_Info *info, unsigned int result); 403 404 /** 405 * fas216_get_last_msg - retrive last message from the list 406 * @info: interface to search 407 * @pos: current fifo position 408 * 409 * Retrieve a last message from the list, using position in fifo. 410 */ 411 static inline unsigned short 412 fas216_get_last_msg(FAS216_Info *info, int pos) 413 { 414 unsigned short packed_msg = NOP; 415 struct message *msg; 416 int msgnr = 0; 417 418 while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { 419 if (pos >= msg->fifo) 420 break; 421 } 422 423 if (msg) { 424 if (msg->msg[0] == EXTENDED_MESSAGE) 425 packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8; 426 else 427 packed_msg = msg->msg[0]; 428 } 429 430 fas216_log(info, LOG_MESSAGES, 431 "Message: %04x found at position %02x\n", packed_msg, pos); 432 433 return packed_msg; 434 } 435 436 /** 437 * fas216_syncperiod - calculate STP register value 438 * @info: state structure for interface connected to device 439 * @ns: period in ns (between subsequent bytes) 440 * 441 * Calculate value to be loaded into the STP register for a given period 442 * in ns. Returns a value suitable for REG_STP. 443 */ 444 static int fas216_syncperiod(FAS216_Info *info, int ns) 445 { 446 int value = (info->ifcfg.clockrate * ns) / 1000; 447 448 fas216_checkmagic(info); 449 450 if (value < 4) 451 value = 4; 452 else if (value > 35) 453 value = 35; 454 455 return value & 31; 456 } 457 458 /** 459 * fas216_set_sync - setup FAS216 chip for specified transfer period. 460 * @info: state structure for interface connected to device 461 * @target: target 462 * 463 * Correctly setup FAS216 chip for specified transfer period. 464 * Notes : we need to switch the chip out of FASTSCSI mode if we have 465 * a transfer period >= 200ns - otherwise the chip will violate 466 * the SCSI timings. 467 */ 468 static void fas216_set_sync(FAS216_Info *info, int target) 469 { 470 unsigned int cntl3; 471 472 fas216_writeb(info, REG_SOF, info->device[target].sof); 473 fas216_writeb(info, REG_STP, info->device[target].stp); 474 475 cntl3 = info->scsi.cfg[2]; 476 if (info->device[target].period >= (200 / 4)) 477 cntl3 = cntl3 & ~CNTL3_FASTSCSI; 478 479 fas216_writeb(info, REG_CNTL3, cntl3); 480 } 481 482 /* Synchronous transfer support 483 * 484 * Note: The SCSI II r10 spec says (5.6.12): 485 * 486 * (2) Due to historical problems with early host adapters that could 487 * not accept an SDTR message, some targets may not initiate synchronous 488 * negotiation after a power cycle as required by this standard. Host 489 * adapters that support synchronous mode may avoid the ensuing failure 490 * modes when the target is independently power cycled by initiating a 491 * synchronous negotiation on each REQUEST SENSE and INQUIRY command. 492 * This approach increases the SCSI bus overhead and is not recommended 493 * for new implementations. The correct method is to respond to an 494 * SDTR message with a MESSAGE REJECT message if the either the 495 * initiator or target devices does not support synchronous transfers 496 * or does not want to negotiate for synchronous transfers at the time. 497 * Using the correct method assures compatibility with wide data 498 * transfers and future enhancements. 499 * 500 * We will always initiate a synchronous transfer negotiation request on 501 * every INQUIRY or REQUEST SENSE message, unless the target itself has 502 * at some point performed a synchronous transfer negotiation request, or 503 * we have synchronous transfers disabled for this device. 504 */ 505 506 /** 507 * fas216_handlesync - Handle a synchronous transfer message 508 * @info: state structure for interface 509 * @msg: message from target 510 * 511 * Handle a synchronous transfer message from the target 512 */ 513 static void fas216_handlesync(FAS216_Info *info, char *msg) 514 { 515 struct fas216_device *dev = &info->device[info->SCpnt->device->id]; 516 enum { sync, async, none, reject } res = none; 517 518 #ifdef SCSI2_SYNC 519 switch (msg[0]) { 520 case MESSAGE_REJECT: 521 /* Synchronous transfer request failed. 522 * Note: SCSI II r10: 523 * 524 * SCSI devices that are capable of synchronous 525 * data transfers shall not respond to an SDTR 526 * message with a MESSAGE REJECT message. 527 * 528 * Hence, if we get this condition, we disable 529 * negotiation for this device. 530 */ 531 if (dev->sync_state == neg_inprogress) { 532 dev->sync_state = neg_invalid; 533 res = async; 534 } 535 break; 536 537 case EXTENDED_MESSAGE: 538 switch (dev->sync_state) { 539 /* We don't accept synchronous transfer requests. 540 * Respond with a MESSAGE_REJECT to prevent a 541 * synchronous transfer agreement from being reached. 542 */ 543 case neg_invalid: 544 res = reject; 545 break; 546 547 /* We were not negotiating a synchronous transfer, 548 * but the device sent us a negotiation request. 549 * Honour the request by sending back a SDTR 550 * message containing our capability, limited by 551 * the targets capability. 552 */ 553 default: 554 fas216_cmd(info, CMD_SETATN); 555 if (msg[4] > info->ifcfg.sync_max_depth) 556 msg[4] = info->ifcfg.sync_max_depth; 557 if (msg[3] < 1000 / info->ifcfg.clockrate) 558 msg[3] = 1000 / info->ifcfg.clockrate; 559 560 msgqueue_flush(&info->scsi.msgs); 561 msgqueue_addmsg(&info->scsi.msgs, 5, 562 EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 563 msg[3], msg[4]); 564 info->scsi.phase = PHASE_MSGOUT_EXPECT; 565 566 /* This is wrong. The agreement is not in effect 567 * until this message is accepted by the device 568 */ 569 dev->sync_state = neg_targcomplete; 570 res = sync; 571 break; 572 573 /* We initiated the synchronous transfer negotiation, 574 * and have successfully received a response from the 575 * target. The synchronous transfer agreement has been 576 * reached. Note: if the values returned are out of our 577 * bounds, we must reject the message. 578 */ 579 case neg_inprogress: 580 res = reject; 581 if (msg[4] <= info->ifcfg.sync_max_depth && 582 msg[3] >= 1000 / info->ifcfg.clockrate) { 583 dev->sync_state = neg_complete; 584 res = sync; 585 } 586 break; 587 } 588 } 589 #else 590 res = reject; 591 #endif 592 593 switch (res) { 594 case sync: 595 dev->period = msg[3]; 596 dev->sof = msg[4]; 597 dev->stp = fas216_syncperiod(info, msg[3] * 4); 598 fas216_set_sync(info, info->SCpnt->device->id); 599 break; 600 601 case reject: 602 fas216_cmd(info, CMD_SETATN); 603 msgqueue_flush(&info->scsi.msgs); 604 msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT); 605 info->scsi.phase = PHASE_MSGOUT_EXPECT; 606 607 case async: 608 dev->period = info->ifcfg.asyncperiod / 4; 609 dev->sof = 0; 610 dev->stp = info->scsi.async_stp; 611 fas216_set_sync(info, info->SCpnt->device->id); 612 break; 613 614 case none: 615 break; 616 } 617 } 618 619 /** 620 * fas216_updateptrs - update data pointers after transfer suspended/paused 621 * @info: interface's local pointer to update 622 * @bytes_transferred: number of bytes transferred 623 * 624 * Update data pointers after transfer suspended/paused 625 */ 626 static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred) 627 { 628 struct scsi_pointer *SCp = &info->scsi.SCp; 629 630 fas216_checkmagic(info); 631 632 BUG_ON(bytes_transferred < 0); 633 634 SCp->phase -= bytes_transferred; 635 636 while (bytes_transferred != 0) { 637 if (SCp->this_residual > bytes_transferred) 638 break; 639 /* 640 * We have used up this buffer. Move on to the 641 * next buffer. 642 */ 643 bytes_transferred -= SCp->this_residual; 644 if (!next_SCp(SCp) && bytes_transferred) { 645 printk(KERN_WARNING "scsi%d.%c: out of buffers\n", 646 info->host->host_no, '0' + info->SCpnt->device->id); 647 return; 648 } 649 } 650 651 SCp->this_residual -= bytes_transferred; 652 if (SCp->this_residual) 653 SCp->ptr += bytes_transferred; 654 else 655 SCp->ptr = NULL; 656 } 657 658 /** 659 * fas216_pio - transfer data off of/on to card using programmed IO 660 * @info: interface to transfer data to/from 661 * @direction: direction to transfer data (DMA_OUT/DMA_IN) 662 * 663 * Transfer data off of/on to card using programmed IO. 664 * Notes: this is incredibly slow. 665 */ 666 static void fas216_pio(FAS216_Info *info, fasdmadir_t direction) 667 { 668 struct scsi_pointer *SCp = &info->scsi.SCp; 669 670 fas216_checkmagic(info); 671 672 if (direction == DMA_OUT) 673 fas216_writeb(info, REG_FF, get_next_SCp_byte(SCp)); 674 else 675 put_next_SCp_byte(SCp, fas216_readb(info, REG_FF)); 676 677 if (SCp->this_residual == 0) 678 next_SCp(SCp); 679 } 680 681 static void fas216_set_stc(FAS216_Info *info, unsigned int length) 682 { 683 fas216_writeb(info, REG_STCL, length); 684 fas216_writeb(info, REG_STCM, length >> 8); 685 fas216_writeb(info, REG_STCH, length >> 16); 686 } 687 688 static unsigned int fas216_get_ctc(FAS216_Info *info) 689 { 690 return fas216_readb(info, REG_CTCL) + 691 (fas216_readb(info, REG_CTCM) << 8) + 692 (fas216_readb(info, REG_CTCH) << 16); 693 } 694 695 /** 696 * fas216_cleanuptransfer - clean up after a transfer has completed. 697 * @info: interface to clean up 698 * 699 * Update the data pointers according to the number of bytes transferred 700 * on the SCSI bus. 701 */ 702 static void fas216_cleanuptransfer(FAS216_Info *info) 703 { 704 unsigned long total, residual, fifo; 705 fasdmatype_t dmatype = info->dma.transfer_type; 706 707 info->dma.transfer_type = fasdma_none; 708 709 /* 710 * PIO transfers do not need to be cleaned up. 711 */ 712 if (dmatype == fasdma_pio || dmatype == fasdma_none) 713 return; 714 715 if (dmatype == fasdma_real_all) 716 total = info->scsi.SCp.phase; 717 else 718 total = info->scsi.SCp.this_residual; 719 720 residual = fas216_get_ctc(info); 721 722 fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; 723 724 fas216_log(info, LOG_BUFFER, "cleaning up from previous " 725 "transfer: length 0x%06x, residual 0x%x, fifo %d", 726 total, residual, fifo); 727 728 /* 729 * If we were performing Data-Out, the transfer counter 730 * counts down each time a byte is transferred by the 731 * host to the FIFO. This means we must include the 732 * bytes left in the FIFO from the transfer counter. 733 */ 734 if (info->scsi.phase == PHASE_DATAOUT) 735 residual += fifo; 736 737 fas216_updateptrs(info, total - residual); 738 } 739 740 /** 741 * fas216_transfer - Perform a DMA/PIO transfer off of/on to card 742 * @info: interface from which device disconnected from 743 * 744 * Start a DMA/PIO transfer off of/on to card 745 */ 746 static void fas216_transfer(FAS216_Info *info) 747 { 748 fasdmadir_t direction; 749 fasdmatype_t dmatype; 750 751 fas216_log(info, LOG_BUFFER, 752 "starttransfer: buffer %p length 0x%06x reqlen 0x%06x", 753 info->scsi.SCp.ptr, info->scsi.SCp.this_residual, 754 info->scsi.SCp.phase); 755 756 if (!info->scsi.SCp.ptr) { 757 fas216_log(info, LOG_ERROR, "null buffer passed to " 758 "fas216_starttransfer"); 759 print_SCp(&info->scsi.SCp, "SCp: ", "\n"); 760 print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n"); 761 return; 762 } 763 764 /* 765 * If we have a synchronous transfer agreement in effect, we must 766 * use DMA mode. If we are using asynchronous transfers, we may 767 * use DMA mode or PIO mode. 768 */ 769 if (info->device[info->SCpnt->device->id].sof) 770 dmatype = fasdma_real_all; 771 else 772 dmatype = fasdma_pio; 773 774 if (info->scsi.phase == PHASE_DATAOUT) 775 direction = DMA_OUT; 776 else 777 direction = DMA_IN; 778 779 if (info->dma.setup) 780 dmatype = info->dma.setup(info->host, &info->scsi.SCp, 781 direction, dmatype); 782 info->dma.transfer_type = dmatype; 783 784 if (dmatype == fasdma_real_all) 785 fas216_set_stc(info, info->scsi.SCp.phase); 786 else 787 fas216_set_stc(info, info->scsi.SCp.this_residual); 788 789 switch (dmatype) { 790 case fasdma_pio: 791 fas216_log(info, LOG_BUFFER, "PIO transfer"); 792 fas216_writeb(info, REG_SOF, 0); 793 fas216_writeb(info, REG_STP, info->scsi.async_stp); 794 fas216_cmd(info, CMD_TRANSFERINFO); 795 fas216_pio(info, direction); 796 break; 797 798 case fasdma_pseudo: 799 fas216_log(info, LOG_BUFFER, "pseudo transfer"); 800 fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); 801 info->dma.pseudo(info->host, &info->scsi.SCp, 802 direction, info->SCpnt->transfersize); 803 break; 804 805 case fasdma_real_block: 806 fas216_log(info, LOG_BUFFER, "block dma transfer"); 807 fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); 808 break; 809 810 case fasdma_real_all: 811 fas216_log(info, LOG_BUFFER, "total dma transfer"); 812 fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); 813 break; 814 815 default: 816 fas216_log(info, LOG_BUFFER | LOG_ERROR, 817 "invalid FAS216 DMA type"); 818 break; 819 } 820 } 821 822 /** 823 * fas216_stoptransfer - Stop a DMA transfer onto / off of the card 824 * @info: interface from which device disconnected from 825 * 826 * Called when we switch away from DATA IN or DATA OUT phases. 827 */ 828 static void fas216_stoptransfer(FAS216_Info *info) 829 { 830 fas216_checkmagic(info); 831 832 if (info->dma.transfer_type == fasdma_real_all || 833 info->dma.transfer_type == fasdma_real_block) 834 info->dma.stop(info->host, &info->scsi.SCp); 835 836 fas216_cleanuptransfer(info); 837 838 if (info->scsi.phase == PHASE_DATAIN) { 839 unsigned int fifo; 840 841 /* 842 * If we were performing Data-In, then the FIFO counter 843 * contains the number of bytes not transferred via DMA 844 * from the on-board FIFO. Read them manually. 845 */ 846 fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; 847 while (fifo && info->scsi.SCp.ptr) { 848 *info->scsi.SCp.ptr = fas216_readb(info, REG_FF); 849 fas216_updateptrs(info, 1); 850 fifo--; 851 } 852 } else { 853 /* 854 * After a Data-Out phase, there may be unsent 855 * bytes left in the FIFO. Flush them out. 856 */ 857 fas216_cmd(info, CMD_FLUSHFIFO); 858 } 859 } 860 861 static void fas216_aborttransfer(FAS216_Info *info) 862 { 863 fas216_checkmagic(info); 864 865 if (info->dma.transfer_type == fasdma_real_all || 866 info->dma.transfer_type == fasdma_real_block) 867 info->dma.stop(info->host, &info->scsi.SCp); 868 869 info->dma.transfer_type = fasdma_none; 870 fas216_cmd(info, CMD_FLUSHFIFO); 871 } 872 873 static void fas216_kick(FAS216_Info *info); 874 875 /** 876 * fas216_disconnected_intr - handle device disconnection 877 * @info: interface from which device disconnected from 878 * 879 * Handle device disconnection 880 */ 881 static void fas216_disconnect_intr(FAS216_Info *info) 882 { 883 unsigned long flags; 884 885 fas216_checkmagic(info); 886 887 fas216_log(info, LOG_CONNECT, "disconnect phase=%02x", 888 info->scsi.phase); 889 890 msgqueue_flush(&info->scsi.msgs); 891 892 switch (info->scsi.phase) { 893 case PHASE_SELECTION: /* while selecting - no target */ 894 case PHASE_SELSTEPS: 895 fas216_done(info, DID_NO_CONNECT); 896 break; 897 898 case PHASE_MSGIN_DISCONNECT: /* message in - disconnecting */ 899 info->scsi.disconnectable = 1; 900 info->scsi.phase = PHASE_IDLE; 901 info->stats.disconnects += 1; 902 spin_lock_irqsave(&info->host_lock, flags); 903 if (info->scsi.phase == PHASE_IDLE) 904 fas216_kick(info); 905 spin_unlock_irqrestore(&info->host_lock, flags); 906 break; 907 908 case PHASE_DONE: /* at end of command - complete */ 909 fas216_done(info, DID_OK); 910 break; 911 912 case PHASE_MSGOUT: /* message out - possible ABORT message */ 913 if (fas216_get_last_msg(info, info->scsi.msgin_fifo) == ABORT) { 914 info->scsi.aborting = 0; 915 fas216_done(info, DID_ABORT); 916 break; 917 } 918 919 default: /* huh? */ 920 printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %s\n", 921 info->host->host_no, fas216_target(info), fas216_drv_phase(info)); 922 print_debug_list(); 923 fas216_stoptransfer(info); 924 fas216_done(info, DID_ERROR); 925 break; 926 } 927 } 928 929 /** 930 * fas216_reselected_intr - start reconnection of a device 931 * @info: interface which was reselected 932 * 933 * Start reconnection of a device 934 */ 935 static void 936 fas216_reselected_intr(FAS216_Info *info) 937 { 938 unsigned int cfis, i; 939 unsigned char msg[4]; 940 unsigned char target, lun, tag; 941 942 fas216_checkmagic(info); 943 944 WARN_ON(info->scsi.phase == PHASE_SELECTION || 945 info->scsi.phase == PHASE_SELSTEPS); 946 947 cfis = fas216_readb(info, REG_CFIS); 948 949 fas216_log(info, LOG_CONNECT, "reconnect phase=%02x cfis=%02x", 950 info->scsi.phase, cfis); 951 952 cfis &= CFIS_CF; 953 954 if (cfis < 2 || cfis > 4) { 955 printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselect\n", 956 info->host->host_no); 957 goto bad_message; 958 } 959 960 for (i = 0; i < cfis; i++) 961 msg[i] = fas216_readb(info, REG_FF); 962 963 if (!(msg[0] & (1 << info->host->this_id)) || 964 !(msg[1] & 0x80)) 965 goto initiator_error; 966 967 target = msg[0] & ~(1 << info->host->this_id); 968 target = ffs(target) - 1; 969 lun = msg[1] & 7; 970 tag = 0; 971 972 if (cfis >= 3) { 973 if (msg[2] != SIMPLE_QUEUE_TAG) 974 goto initiator_error; 975 976 tag = msg[3]; 977 } 978 979 /* set up for synchronous transfers */ 980 fas216_writeb(info, REG_SDID, target); 981 fas216_set_sync(info, target); 982 msgqueue_flush(&info->scsi.msgs); 983 984 fas216_log(info, LOG_CONNECT, "Reconnected: target %1x lun %1x tag %02x", 985 target, lun, tag); 986 987 if (info->scsi.disconnectable && info->SCpnt) { 988 info->scsi.disconnectable = 0; 989 if (info->SCpnt->device->id == target && 990 info->SCpnt->device->lun == lun && 991 info->SCpnt->tag == tag) { 992 fas216_log(info, LOG_CONNECT, "reconnected previously executing command"); 993 } else { 994 queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt); 995 fas216_log(info, LOG_CONNECT, "had to move command to disconnected queue"); 996 info->SCpnt = NULL; 997 } 998 } 999 if (!info->SCpnt) { 1000 info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected, 1001 target, lun, tag); 1002 fas216_log(info, LOG_CONNECT, "had to get command"); 1003 } 1004 1005 if (info->SCpnt) { 1006 /* 1007 * Restore data pointer from SAVED data pointer 1008 */ 1009 info->scsi.SCp = info->SCpnt->SCp; 1010 1011 fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]", 1012 info->scsi.SCp.ptr, info->scsi.SCp.this_residual); 1013 info->scsi.phase = PHASE_MSGIN; 1014 } else { 1015 /* 1016 * Our command structure not found - abort the 1017 * command on the target. Since we have no 1018 * record of this command, we can't send 1019 * an INITIATOR DETECTED ERROR message. 1020 */ 1021 fas216_cmd(info, CMD_SETATN); 1022 1023 #if 0 1024 if (tag) 1025 msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, tag); 1026 else 1027 #endif 1028 msgqueue_addmsg(&info->scsi.msgs, 1, ABORT); 1029 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1030 info->scsi.aborting = 1; 1031 } 1032 1033 fas216_cmd(info, CMD_MSGACCEPTED); 1034 return; 1035 1036 initiator_error: 1037 printk(KERN_ERR "scsi%d.H: error during reselection: bytes", 1038 info->host->host_no); 1039 for (i = 0; i < cfis; i++) 1040 printk(" %02x", msg[i]); 1041 printk("\n"); 1042 bad_message: 1043 fas216_cmd(info, CMD_SETATN); 1044 msgqueue_flush(&info->scsi.msgs); 1045 msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); 1046 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1047 fas216_cmd(info, CMD_MSGACCEPTED); 1048 } 1049 1050 static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen) 1051 { 1052 int i; 1053 1054 switch (message[0]) { 1055 case COMMAND_COMPLETE: 1056 if (msglen != 1) 1057 goto unrecognised; 1058 1059 printk(KERN_ERR "scsi%d.%c: command complete with no " 1060 "status in MESSAGE_IN?\n", 1061 info->host->host_no, fas216_target(info)); 1062 break; 1063 1064 case SAVE_POINTERS: 1065 if (msglen != 1) 1066 goto unrecognised; 1067 1068 /* 1069 * Save current data pointer to SAVED data pointer 1070 * SCSI II standard says that we must not acknowledge 1071 * this until we have really saved pointers. 1072 * NOTE: we DO NOT save the command nor status pointers 1073 * as required by the SCSI II standard. These always 1074 * point to the start of their respective areas. 1075 */ 1076 info->SCpnt->SCp = info->scsi.SCp; 1077 info->SCpnt->SCp.sent_command = 0; 1078 fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, 1079 "save data pointers: [%p, %X]", 1080 info->scsi.SCp.ptr, info->scsi.SCp.this_residual); 1081 break; 1082 1083 case RESTORE_POINTERS: 1084 if (msglen != 1) 1085 goto unrecognised; 1086 1087 /* 1088 * Restore current data pointer from SAVED data pointer 1089 */ 1090 info->scsi.SCp = info->SCpnt->SCp; 1091 fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, 1092 "restore data pointers: [%p, 0x%x]", 1093 info->scsi.SCp.ptr, info->scsi.SCp.this_residual); 1094 break; 1095 1096 case DISCONNECT: 1097 if (msglen != 1) 1098 goto unrecognised; 1099 1100 info->scsi.phase = PHASE_MSGIN_DISCONNECT; 1101 break; 1102 1103 case MESSAGE_REJECT: 1104 if (msglen != 1) 1105 goto unrecognised; 1106 1107 switch (fas216_get_last_msg(info, info->scsi.msgin_fifo)) { 1108 case EXTENDED_MESSAGE | EXTENDED_SDTR << 8: 1109 fas216_handlesync(info, message); 1110 break; 1111 1112 default: 1113 fas216_log(info, 0, "reject, last message 0x%04x", 1114 fas216_get_last_msg(info, info->scsi.msgin_fifo)); 1115 } 1116 break; 1117 1118 case NOP: 1119 break; 1120 1121 case EXTENDED_MESSAGE: 1122 if (msglen < 3) 1123 goto unrecognised; 1124 1125 switch (message[2]) { 1126 case EXTENDED_SDTR: /* Sync transfer negotiation request/reply */ 1127 fas216_handlesync(info, message); 1128 break; 1129 1130 default: 1131 goto unrecognised; 1132 } 1133 break; 1134 1135 default: 1136 goto unrecognised; 1137 } 1138 return; 1139 1140 unrecognised: 1141 fas216_log(info, 0, "unrecognised message, rejecting"); 1142 printk("scsi%d.%c: message was", info->host->host_no, fas216_target(info)); 1143 for (i = 0; i < msglen; i++) 1144 printk("%s%02X", i & 31 ? " " : "\n ", message[i]); 1145 printk("\n"); 1146 1147 /* 1148 * Something strange seems to be happening here - 1149 * I can't use SETATN since the chip gives me an 1150 * invalid command interrupt when I do. Weird. 1151 */ 1152 fas216_cmd(info, CMD_NOP); 1153 fas216_dumpstate(info); 1154 fas216_cmd(info, CMD_SETATN); 1155 msgqueue_flush(&info->scsi.msgs); 1156 msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT); 1157 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1158 fas216_dumpstate(info); 1159 } 1160 1161 static int fas216_wait_cmd(FAS216_Info *info, int cmd) 1162 { 1163 int tout; 1164 int stat; 1165 1166 fas216_cmd(info, cmd); 1167 1168 for (tout = 1000; tout; tout -= 1) { 1169 stat = fas216_readb(info, REG_STAT); 1170 if (stat & (STAT_INT|STAT_PARITYERROR)) 1171 break; 1172 udelay(1); 1173 } 1174 1175 return stat; 1176 } 1177 1178 static int fas216_get_msg_byte(FAS216_Info *info) 1179 { 1180 unsigned int stat = fas216_wait_cmd(info, CMD_MSGACCEPTED); 1181 1182 if ((stat & STAT_INT) == 0) 1183 goto timedout; 1184 1185 if ((stat & STAT_BUSMASK) != STAT_MESGIN) 1186 goto unexpected_phase_change; 1187 1188 fas216_readb(info, REG_INST); 1189 1190 stat = fas216_wait_cmd(info, CMD_TRANSFERINFO); 1191 1192 if ((stat & STAT_INT) == 0) 1193 goto timedout; 1194 1195 if (stat & STAT_PARITYERROR) 1196 goto parity_error; 1197 1198 if ((stat & STAT_BUSMASK) != STAT_MESGIN) 1199 goto unexpected_phase_change; 1200 1201 fas216_readb(info, REG_INST); 1202 1203 return fas216_readb(info, REG_FF); 1204 1205 timedout: 1206 fas216_log(info, LOG_ERROR, "timed out waiting for message byte"); 1207 return -1; 1208 1209 unexpected_phase_change: 1210 fas216_log(info, LOG_ERROR, "unexpected phase change: status = %02x", stat); 1211 return -2; 1212 1213 parity_error: 1214 fas216_log(info, LOG_ERROR, "parity error during message in phase"); 1215 return -3; 1216 } 1217 1218 /** 1219 * fas216_message - handle a function done interrupt from FAS216 chip 1220 * @info: interface which caused function done interrupt 1221 * 1222 * Handle a function done interrupt from FAS216 chip 1223 */ 1224 static void fas216_message(FAS216_Info *info) 1225 { 1226 unsigned char *message = info->scsi.message; 1227 unsigned int msglen = 1; 1228 int msgbyte = 0; 1229 1230 fas216_checkmagic(info); 1231 1232 message[0] = fas216_readb(info, REG_FF); 1233 1234 if (message[0] == EXTENDED_MESSAGE) { 1235 msgbyte = fas216_get_msg_byte(info); 1236 1237 if (msgbyte >= 0) { 1238 message[1] = msgbyte; 1239 1240 for (msglen = 2; msglen < message[1] + 2; msglen++) { 1241 msgbyte = fas216_get_msg_byte(info); 1242 1243 if (msgbyte >= 0) 1244 message[msglen] = msgbyte; 1245 else 1246 break; 1247 } 1248 } 1249 } 1250 1251 if (msgbyte == -3) 1252 goto parity_error; 1253 1254 #ifdef DEBUG_MESSAGES 1255 { 1256 int i; 1257 1258 printk("scsi%d.%c: message in: ", 1259 info->host->host_no, fas216_target(info)); 1260 for (i = 0; i < msglen; i++) 1261 printk("%02X ", message[i]); 1262 printk("\n"); 1263 } 1264 #endif 1265 1266 fas216_parse_message(info, message, msglen); 1267 fas216_cmd(info, CMD_MSGACCEPTED); 1268 return; 1269 1270 parity_error: 1271 fas216_cmd(info, CMD_SETATN); 1272 msgqueue_flush(&info->scsi.msgs); 1273 msgqueue_addmsg(&info->scsi.msgs, 1, MSG_PARITY_ERROR); 1274 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1275 fas216_cmd(info, CMD_MSGACCEPTED); 1276 return; 1277 } 1278 1279 /** 1280 * fas216_send_command - send command after all message bytes have been sent 1281 * @info: interface which caused bus service 1282 * 1283 * Send a command to a target after all message bytes have been sent 1284 */ 1285 static void fas216_send_command(FAS216_Info *info) 1286 { 1287 int i; 1288 1289 fas216_checkmagic(info); 1290 1291 fas216_cmd(info, CMD_NOP|CMD_WITHDMA); 1292 fas216_cmd(info, CMD_FLUSHFIFO); 1293 1294 /* load command */ 1295 for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++) 1296 fas216_writeb(info, REG_FF, info->SCpnt->cmnd[i]); 1297 1298 fas216_cmd(info, CMD_TRANSFERINFO); 1299 1300 info->scsi.phase = PHASE_COMMAND; 1301 } 1302 1303 /** 1304 * fas216_send_messageout - handle bus service to send a message 1305 * @info: interface which caused bus service 1306 * 1307 * Handle bus service to send a message. 1308 * Note: We do not allow the device to change the data direction! 1309 */ 1310 static void fas216_send_messageout(FAS216_Info *info, int start) 1311 { 1312 unsigned int tot_msglen = msgqueue_msglength(&info->scsi.msgs); 1313 1314 fas216_checkmagic(info); 1315 1316 fas216_cmd(info, CMD_FLUSHFIFO); 1317 1318 if (tot_msglen) { 1319 struct message *msg; 1320 int msgnr = 0; 1321 1322 while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { 1323 int i; 1324 1325 for (i = start; i < msg->length; i++) 1326 fas216_writeb(info, REG_FF, msg->msg[i]); 1327 1328 msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF); 1329 start = 0; 1330 } 1331 } else 1332 fas216_writeb(info, REG_FF, NOP); 1333 1334 fas216_cmd(info, CMD_TRANSFERINFO); 1335 1336 info->scsi.phase = PHASE_MSGOUT; 1337 } 1338 1339 /** 1340 * fas216_busservice_intr - handle bus service interrupt from FAS216 chip 1341 * @info: interface which caused bus service interrupt 1342 * @stat: Status register contents 1343 * @is: SCSI Status register contents 1344 * 1345 * Handle a bus service interrupt from FAS216 chip 1346 */ 1347 static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int is) 1348 { 1349 fas216_checkmagic(info); 1350 1351 fas216_log(info, LOG_BUSSERVICE, 1352 "bus service: stat=%02x is=%02x phase=%02x", 1353 stat, is, info->scsi.phase); 1354 1355 switch (info->scsi.phase) { 1356 case PHASE_SELECTION: 1357 if ((is & IS_BITS) != IS_MSGBYTESENT) 1358 goto bad_is; 1359 break; 1360 1361 case PHASE_SELSTEPS: 1362 switch (is & IS_BITS) { 1363 case IS_SELARB: 1364 case IS_MSGBYTESENT: 1365 goto bad_is; 1366 1367 case IS_NOTCOMMAND: 1368 case IS_EARLYPHASE: 1369 if ((stat & STAT_BUSMASK) == STAT_MESGIN) 1370 break; 1371 goto bad_is; 1372 1373 case IS_COMPLETE: 1374 break; 1375 } 1376 1377 default: 1378 break; 1379 } 1380 1381 fas216_cmd(info, CMD_NOP); 1382 1383 #define STATE(st,ph) ((ph) << 3 | (st)) 1384 /* This table describes the legal SCSI state transitions, 1385 * as described by the SCSI II spec. 1386 */ 1387 switch (STATE(stat & STAT_BUSMASK, info->scsi.phase)) { 1388 case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> Data In */ 1389 case STATE(STAT_DATAIN, PHASE_MSGOUT): /* Message Out -> Data In */ 1390 case STATE(STAT_DATAIN, PHASE_COMMAND): /* Command -> Data In */ 1391 case STATE(STAT_DATAIN, PHASE_MSGIN): /* Message In -> Data In */ 1392 info->scsi.phase = PHASE_DATAIN; 1393 fas216_transfer(info); 1394 return; 1395 1396 case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */ 1397 case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */ 1398 fas216_cleanuptransfer(info); 1399 fas216_transfer(info); 1400 return; 1401 1402 case STATE(STAT_DATAOUT, PHASE_SELSTEPS):/* Sel w/ steps-> Data Out */ 1403 case STATE(STAT_DATAOUT, PHASE_MSGOUT): /* Message Out -> Data Out */ 1404 case STATE(STAT_DATAOUT, PHASE_COMMAND):/* Command -> Data Out */ 1405 case STATE(STAT_DATAOUT, PHASE_MSGIN): /* Message In -> Data Out */ 1406 fas216_cmd(info, CMD_FLUSHFIFO); 1407 info->scsi.phase = PHASE_DATAOUT; 1408 fas216_transfer(info); 1409 return; 1410 1411 case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out -> Status */ 1412 case STATE(STAT_STATUS, PHASE_DATAIN): /* Data In -> Status */ 1413 fas216_stoptransfer(info); 1414 case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status */ 1415 case STATE(STAT_STATUS, PHASE_MSGOUT): /* Message Out -> Status */ 1416 case STATE(STAT_STATUS, PHASE_COMMAND): /* Command -> Status */ 1417 case STATE(STAT_STATUS, PHASE_MSGIN): /* Message In -> Status */ 1418 fas216_cmd(info, CMD_INITCMDCOMPLETE); 1419 info->scsi.phase = PHASE_STATUS; 1420 return; 1421 1422 case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out -> Message In */ 1423 case STATE(STAT_MESGIN, PHASE_DATAIN): /* Data In -> Message In */ 1424 fas216_stoptransfer(info); 1425 case STATE(STAT_MESGIN, PHASE_COMMAND): /* Command -> Message In */ 1426 case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In */ 1427 case STATE(STAT_MESGIN, PHASE_MSGOUT): /* Message Out -> Message In */ 1428 info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; 1429 fas216_cmd(info, CMD_FLUSHFIFO); 1430 fas216_cmd(info, CMD_TRANSFERINFO); 1431 info->scsi.phase = PHASE_MSGIN; 1432 return; 1433 1434 case STATE(STAT_MESGIN, PHASE_MSGIN): 1435 info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; 1436 fas216_cmd(info, CMD_TRANSFERINFO); 1437 return; 1438 1439 case STATE(STAT_COMMAND, PHASE_MSGOUT): /* Message Out -> Command */ 1440 case STATE(STAT_COMMAND, PHASE_MSGIN): /* Message In -> Command */ 1441 fas216_send_command(info); 1442 info->scsi.phase = PHASE_COMMAND; 1443 return; 1444 1445 1446 /* 1447 * Selection -> Message Out 1448 */ 1449 case STATE(STAT_MESGOUT, PHASE_SELECTION): 1450 fas216_send_messageout(info, 1); 1451 return; 1452 1453 /* 1454 * Message Out -> Message Out 1455 */ 1456 case STATE(STAT_MESGOUT, PHASE_SELSTEPS): 1457 case STATE(STAT_MESGOUT, PHASE_MSGOUT): 1458 /* 1459 * If we get another message out phase, this usually 1460 * means some parity error occurred. Resend complete 1461 * set of messages. If we have more than one byte to 1462 * send, we need to assert ATN again. 1463 */ 1464 if (info->device[info->SCpnt->device->id].parity_check) { 1465 /* 1466 * We were testing... good, the device 1467 * supports parity checking. 1468 */ 1469 info->device[info->SCpnt->device->id].parity_check = 0; 1470 info->device[info->SCpnt->device->id].parity_enabled = 1; 1471 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); 1472 } 1473 1474 if (msgqueue_msglength(&info->scsi.msgs) > 1) 1475 fas216_cmd(info, CMD_SETATN); 1476 /*FALLTHROUGH*/ 1477 1478 /* 1479 * Any -> Message Out 1480 */ 1481 case STATE(STAT_MESGOUT, PHASE_MSGOUT_EXPECT): 1482 fas216_send_messageout(info, 0); 1483 return; 1484 1485 /* Error recovery rules. 1486 * These either attempt to abort or retry the operation. 1487 * TODO: we need more of these 1488 */ 1489 case STATE(STAT_COMMAND, PHASE_COMMAND):/* Command -> Command */ 1490 /* error - we've sent out all the command bytes 1491 * we have. 1492 * NOTE: we need SAVE DATA POINTERS/RESTORE DATA POINTERS 1493 * to include the command bytes sent for this to work 1494 * correctly. 1495 */ 1496 printk(KERN_ERR "scsi%d.%c: " 1497 "target trying to receive more command bytes\n", 1498 info->host->host_no, fas216_target(info)); 1499 fas216_cmd(info, CMD_SETATN); 1500 fas216_set_stc(info, 15); 1501 fas216_cmd(info, CMD_PADBYTES | CMD_WITHDMA); 1502 msgqueue_flush(&info->scsi.msgs); 1503 msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); 1504 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1505 return; 1506 } 1507 1508 if (info->scsi.phase == PHASE_MSGIN_DISCONNECT) { 1509 printk(KERN_ERR "scsi%d.%c: disconnect message received, but bus service %s?\n", 1510 info->host->host_no, fas216_target(info), 1511 fas216_bus_phase(stat)); 1512 msgqueue_flush(&info->scsi.msgs); 1513 fas216_cmd(info, CMD_SETATN); 1514 msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); 1515 info->scsi.phase = PHASE_MSGOUT_EXPECT; 1516 info->scsi.aborting = 1; 1517 fas216_cmd(info, CMD_TRANSFERINFO); 1518 return; 1519 } 1520 printk(KERN_ERR "scsi%d.%c: bus phase %s after %s?\n", 1521 info->host->host_no, fas216_target(info), 1522 fas216_bus_phase(stat), 1523 fas216_drv_phase(info)); 1524 print_debug_list(); 1525 return; 1526 1527 bad_is: 1528 fas216_log(info, 0, "bus service at step %d?", is & IS_BITS); 1529 fas216_dumpstate(info); 1530 print_debug_list(); 1531 1532 fas216_done(info, DID_ERROR); 1533 } 1534 1535 /** 1536 * fas216_funcdone_intr - handle a function done interrupt from FAS216 chip 1537 * @info: interface which caused function done interrupt 1538 * @stat: Status register contents 1539 * @is: SCSI Status register contents 1540 * 1541 * Handle a function done interrupt from FAS216 chip 1542 */ 1543 static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int is) 1544 { 1545 unsigned int fifo_len = fas216_readb(info, REG_CFIS) & CFIS_CF; 1546 1547 fas216_checkmagic(info); 1548 1549 fas216_log(info, LOG_FUNCTIONDONE, 1550 "function done: stat=%02x is=%02x phase=%02x", 1551 stat, is, info->scsi.phase); 1552 1553 switch (info->scsi.phase) { 1554 case PHASE_STATUS: /* status phase - read status and msg */ 1555 if (fifo_len != 2) { 1556 fas216_log(info, 0, "odd number of bytes in FIFO: %d", fifo_len); 1557 } 1558 /* 1559 * Read status then message byte. 1560 */ 1561 info->scsi.SCp.Status = fas216_readb(info, REG_FF); 1562 info->scsi.SCp.Message = fas216_readb(info, REG_FF); 1563 info->scsi.phase = PHASE_DONE; 1564 fas216_cmd(info, CMD_MSGACCEPTED); 1565 break; 1566 1567 case PHASE_IDLE: 1568 case PHASE_SELECTION: 1569 case PHASE_SELSTEPS: 1570 break; 1571 1572 case PHASE_MSGIN: /* message in phase */ 1573 if ((stat & STAT_BUSMASK) == STAT_MESGIN) { 1574 info->scsi.msgin_fifo = fifo_len; 1575 fas216_message(info); 1576 break; 1577 } 1578 1579 default: 1580 fas216_log(info, 0, "internal phase %s for function done?" 1581 " What do I do with this?", 1582 fas216_target(info), fas216_drv_phase(info)); 1583 } 1584 } 1585 1586 static void fas216_bus_reset(FAS216_Info *info) 1587 { 1588 neg_t sync_state; 1589 int i; 1590 1591 msgqueue_flush(&info->scsi.msgs); 1592 1593 sync_state = neg_invalid; 1594 1595 #ifdef SCSI2_SYNC 1596 if (info->ifcfg.capabilities & (FASCAP_DMA|FASCAP_PSEUDODMA)) 1597 sync_state = neg_wait; 1598 #endif 1599 1600 info->scsi.phase = PHASE_IDLE; 1601 info->SCpnt = NULL; /* bug! */ 1602 memset(&info->scsi.SCp, 0, sizeof(info->scsi.SCp)); 1603 1604 for (i = 0; i < 8; i++) { 1605 info->device[i].disconnect_ok = info->ifcfg.disconnect_ok; 1606 info->device[i].sync_state = sync_state; 1607 info->device[i].period = info->ifcfg.asyncperiod / 4; 1608 info->device[i].stp = info->scsi.async_stp; 1609 info->device[i].sof = 0; 1610 info->device[i].wide_xfer = 0; 1611 } 1612 1613 info->rst_bus_status = 1; 1614 wake_up(&info->eh_wait); 1615 } 1616 1617 /** 1618 * fas216_intr - handle interrupts to progress a command 1619 * @info: interface to service 1620 * 1621 * Handle interrupts from the interface to progress a command 1622 */ 1623 irqreturn_t fas216_intr(FAS216_Info *info) 1624 { 1625 unsigned char inst, is, stat; 1626 int handled = IRQ_NONE; 1627 1628 fas216_checkmagic(info); 1629 1630 stat = fas216_readb(info, REG_STAT); 1631 is = fas216_readb(info, REG_IS); 1632 inst = fas216_readb(info, REG_INST); 1633 1634 add_debug_list(stat, is, inst, info->scsi.phase); 1635 1636 if (stat & STAT_INT) { 1637 if (inst & INST_BUSRESET) { 1638 fas216_log(info, 0, "bus reset detected"); 1639 fas216_bus_reset(info); 1640 scsi_report_bus_reset(info->host, 0); 1641 } else if (inst & INST_ILLEGALCMD) { 1642 fas216_log(info, LOG_ERROR, "illegal command given\n"); 1643 fas216_dumpstate(info); 1644 print_debug_list(); 1645 } else if (inst & INST_DISCONNECT) 1646 fas216_disconnect_intr(info); 1647 else if (inst & INST_RESELECTED) /* reselected */ 1648 fas216_reselected_intr(info); 1649 else if (inst & INST_BUSSERVICE) /* bus service request */ 1650 fas216_busservice_intr(info, stat, is); 1651 else if (inst & INST_FUNCDONE) /* function done */ 1652 fas216_funcdone_intr(info, stat, is); 1653 else 1654 fas216_log(info, 0, "unknown interrupt received:" 1655 " phase %s inst %02X is %02X stat %02X", 1656 fas216_drv_phase(info), inst, is, stat); 1657 handled = IRQ_HANDLED; 1658 } 1659 return handled; 1660 } 1661 1662 static void __fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt) 1663 { 1664 int tot_msglen; 1665 1666 /* following what the ESP driver says */ 1667 fas216_set_stc(info, 0); 1668 fas216_cmd(info, CMD_NOP | CMD_WITHDMA); 1669 1670 /* flush FIFO */ 1671 fas216_cmd(info, CMD_FLUSHFIFO); 1672 1673 /* load bus-id and timeout */ 1674 fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id)); 1675 fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); 1676 1677 /* synchronous transfers */ 1678 fas216_set_sync(info, SCpnt->device->id); 1679 1680 tot_msglen = msgqueue_msglength(&info->scsi.msgs); 1681 1682 #ifdef DEBUG_MESSAGES 1683 { 1684 struct message *msg; 1685 int msgnr = 0, i; 1686 1687 printk("scsi%d.%c: message out: ", 1688 info->host->host_no, '0' + SCpnt->device->id); 1689 while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { 1690 printk("{ "); 1691 for (i = 0; i < msg->length; i++) 1692 printk("%02x ", msg->msg[i]); 1693 printk("} "); 1694 } 1695 printk("\n"); 1696 } 1697 #endif 1698 1699 if (tot_msglen == 1 || tot_msglen == 3) { 1700 /* 1701 * We have an easy message length to send... 1702 */ 1703 struct message *msg; 1704 int msgnr = 0, i; 1705 1706 info->scsi.phase = PHASE_SELSTEPS; 1707 1708 /* load message bytes */ 1709 while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { 1710 for (i = 0; i < msg->length; i++) 1711 fas216_writeb(info, REG_FF, msg->msg[i]); 1712 msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF); 1713 } 1714 1715 /* load command */ 1716 for (i = 0; i < SCpnt->cmd_len; i++) 1717 fas216_writeb(info, REG_FF, SCpnt->cmnd[i]); 1718 1719 if (tot_msglen == 1) 1720 fas216_cmd(info, CMD_SELECTATN); 1721 else 1722 fas216_cmd(info, CMD_SELECTATN3); 1723 } else { 1724 /* 1725 * We have an unusual number of message bytes to send. 1726 * Load first byte into fifo, and issue SELECT with ATN and 1727 * stop steps. 1728 */ 1729 struct message *msg = msgqueue_getmsg(&info->scsi.msgs, 0); 1730 1731 fas216_writeb(info, REG_FF, msg->msg[0]); 1732 msg->fifo = 1; 1733 1734 fas216_cmd(info, CMD_SELECTATNSTOP); 1735 } 1736 } 1737 1738 /* 1739 * Decide whether we need to perform a parity test on this device. 1740 * Can also be used to force parity error conditions during initial 1741 * information transfer phase (message out) for test purposes. 1742 */ 1743 static int parity_test(FAS216_Info *info, int target) 1744 { 1745 #if 0 1746 if (target == 3) { 1747 info->device[target].parity_check = 0; 1748 return 1; 1749 } 1750 #endif 1751 return info->device[target].parity_check; 1752 } 1753 1754 static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt) 1755 { 1756 int disconnect_ok; 1757 1758 /* 1759 * claim host busy 1760 */ 1761 info->scsi.phase = PHASE_SELECTION; 1762 info->scsi.SCp = SCpnt->SCp; 1763 info->SCpnt = SCpnt; 1764 info->dma.transfer_type = fasdma_none; 1765 1766 if (parity_test(info, SCpnt->device->id)) 1767 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_PTE); 1768 else 1769 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); 1770 1771 /* 1772 * Don't allow request sense commands to disconnect. 1773 */ 1774 disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE && 1775 info->device[SCpnt->device->id].disconnect_ok; 1776 1777 /* 1778 * build outgoing message bytes 1779 */ 1780 msgqueue_flush(&info->scsi.msgs); 1781 msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->device->lun)); 1782 1783 /* 1784 * add tag message if required 1785 */ 1786 if (SCpnt->tag) 1787 msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag); 1788 1789 do { 1790 #ifdef SCSI2_SYNC 1791 if ((info->device[SCpnt->device->id].sync_state == neg_wait || 1792 info->device[SCpnt->device->id].sync_state == neg_complete) && 1793 (SCpnt->cmnd[0] == REQUEST_SENSE || 1794 SCpnt->cmnd[0] == INQUIRY)) { 1795 info->device[SCpnt->device->id].sync_state = neg_inprogress; 1796 msgqueue_addmsg(&info->scsi.msgs, 5, 1797 EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 1798 1000 / info->ifcfg.clockrate, 1799 info->ifcfg.sync_max_depth); 1800 break; 1801 } 1802 #endif 1803 } while (0); 1804 1805 __fas216_start_command(info, SCpnt); 1806 } 1807 1808 static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt) 1809 { 1810 #ifdef SCSI2_TAG 1811 /* 1812 * tagged queuing - allocate a new tag to this command 1813 */ 1814 if (SCpnt->device->simple_tags && SCpnt->cmnd[0] != REQUEST_SENSE && 1815 SCpnt->cmnd[0] != INQUIRY) { 1816 SCpnt->device->current_tag += 1; 1817 if (SCpnt->device->current_tag == 0) 1818 SCpnt->device->current_tag = 1; 1819 SCpnt->tag = SCpnt->device->current_tag; 1820 } else 1821 #endif 1822 set_bit(SCpnt->device->id * 8 + 1823 (u8)(SCpnt->device->lun & 0x7), info->busyluns); 1824 1825 info->stats.removes += 1; 1826 switch (SCpnt->cmnd[0]) { 1827 case WRITE_6: 1828 case WRITE_10: 1829 case WRITE_12: 1830 info->stats.writes += 1; 1831 break; 1832 case READ_6: 1833 case READ_10: 1834 case READ_12: 1835 info->stats.reads += 1; 1836 break; 1837 default: 1838 info->stats.miscs += 1; 1839 break; 1840 } 1841 } 1842 1843 static void fas216_do_bus_device_reset(FAS216_Info *info, 1844 struct scsi_cmnd *SCpnt) 1845 { 1846 struct message *msg; 1847 1848 /* 1849 * claim host busy 1850 */ 1851 info->scsi.phase = PHASE_SELECTION; 1852 info->scsi.SCp = SCpnt->SCp; 1853 info->SCpnt = SCpnt; 1854 info->dma.transfer_type = fasdma_none; 1855 1856 fas216_log(info, LOG_ERROR, "sending bus device reset"); 1857 1858 msgqueue_flush(&info->scsi.msgs); 1859 msgqueue_addmsg(&info->scsi.msgs, 1, BUS_DEVICE_RESET); 1860 1861 /* following what the ESP driver says */ 1862 fas216_set_stc(info, 0); 1863 fas216_cmd(info, CMD_NOP | CMD_WITHDMA); 1864 1865 /* flush FIFO */ 1866 fas216_cmd(info, CMD_FLUSHFIFO); 1867 1868 /* load bus-id and timeout */ 1869 fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id)); 1870 fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); 1871 1872 /* synchronous transfers */ 1873 fas216_set_sync(info, SCpnt->device->id); 1874 1875 msg = msgqueue_getmsg(&info->scsi.msgs, 0); 1876 1877 fas216_writeb(info, REG_FF, BUS_DEVICE_RESET); 1878 msg->fifo = 1; 1879 1880 fas216_cmd(info, CMD_SELECTATNSTOP); 1881 } 1882 1883 /** 1884 * fas216_kick - kick a command to the interface 1885 * @info: our host interface to kick 1886 * 1887 * Kick a command to the interface, interface should be idle. 1888 * Notes: Interrupts are always disabled! 1889 */ 1890 static void fas216_kick(FAS216_Info *info) 1891 { 1892 struct scsi_cmnd *SCpnt = NULL; 1893 #define TYPE_OTHER 0 1894 #define TYPE_RESET 1 1895 #define TYPE_QUEUE 2 1896 int where_from = TYPE_OTHER; 1897 1898 fas216_checkmagic(info); 1899 1900 /* 1901 * Obtain the next command to process. 1902 */ 1903 do { 1904 if (info->rstSCpnt) { 1905 SCpnt = info->rstSCpnt; 1906 /* don't remove it */ 1907 where_from = TYPE_RESET; 1908 break; 1909 } 1910 1911 if (info->reqSCpnt) { 1912 SCpnt = info->reqSCpnt; 1913 info->reqSCpnt = NULL; 1914 break; 1915 } 1916 1917 if (info->origSCpnt) { 1918 SCpnt = info->origSCpnt; 1919 info->origSCpnt = NULL; 1920 break; 1921 } 1922 1923 /* retrieve next command */ 1924 if (!SCpnt) { 1925 SCpnt = queue_remove_exclude(&info->queues.issue, 1926 info->busyluns); 1927 where_from = TYPE_QUEUE; 1928 break; 1929 } 1930 } while (0); 1931 1932 if (!SCpnt) { 1933 /* 1934 * no command pending, so enable reselection. 1935 */ 1936 fas216_cmd(info, CMD_ENABLESEL); 1937 return; 1938 } 1939 1940 /* 1941 * We're going to start a command, so disable reselection 1942 */ 1943 fas216_cmd(info, CMD_DISABLESEL); 1944 1945 if (info->scsi.disconnectable && info->SCpnt) { 1946 fas216_log(info, LOG_CONNECT, 1947 "moved command for %d to disconnected queue", 1948 info->SCpnt->device->id); 1949 queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt); 1950 info->scsi.disconnectable = 0; 1951 info->SCpnt = NULL; 1952 } 1953 1954 fas216_log_command(info, LOG_CONNECT | LOG_MESSAGES, SCpnt, 1955 "starting"); 1956 1957 switch (where_from) { 1958 case TYPE_QUEUE: 1959 fas216_allocate_tag(info, SCpnt); 1960 case TYPE_OTHER: 1961 fas216_start_command(info, SCpnt); 1962 break; 1963 case TYPE_RESET: 1964 fas216_do_bus_device_reset(info, SCpnt); 1965 break; 1966 } 1967 1968 fas216_log(info, LOG_CONNECT, "select: data pointers [%p, %X]", 1969 info->scsi.SCp.ptr, info->scsi.SCp.this_residual); 1970 1971 /* 1972 * should now get either DISCONNECT or 1973 * (FUNCTION DONE with BUS SERVICE) interrupt 1974 */ 1975 } 1976 1977 /* 1978 * Clean up from issuing a BUS DEVICE RESET message to a device. 1979 */ 1980 static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, 1981 unsigned int result) 1982 { 1983 fas216_log(info, LOG_ERROR, "fas216 device reset complete"); 1984 1985 info->rstSCpnt = NULL; 1986 info->rst_dev_status = 1; 1987 wake_up(&info->eh_wait); 1988 } 1989 1990 /** 1991 * fas216_rq_sns_done - Finish processing automatic request sense command 1992 * @info: interface that completed 1993 * @SCpnt: command that completed 1994 * @result: driver byte of result 1995 * 1996 * Finish processing automatic request sense command 1997 */ 1998 static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, 1999 unsigned int result) 2000 { 2001 fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, 2002 "request sense complete, result=0x%04x%02x%02x", 2003 result, SCpnt->SCp.Message, SCpnt->SCp.Status); 2004 2005 if (result != DID_OK || SCpnt->SCp.Status != GOOD) 2006 /* 2007 * Something went wrong. Make sure that we don't 2008 * have valid data in the sense buffer that could 2009 * confuse the higher levels. 2010 */ 2011 memset(SCpnt->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 2012 //printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id); 2013 //{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); } 2014 /* 2015 * Note that we don't set SCpnt->result, since that should 2016 * reflect the status of the command that we were asked by 2017 * the upper layers to process. This would have been set 2018 * correctly by fas216_std_done. 2019 */ 2020 scsi_eh_restore_cmnd(SCpnt, &info->ses); 2021 SCpnt->scsi_done(SCpnt); 2022 } 2023 2024 /** 2025 * fas216_std_done - finish processing of standard command 2026 * @info: interface that completed 2027 * @SCpnt: command that completed 2028 * @result: driver byte of result 2029 * 2030 * Finish processing of standard command 2031 */ 2032 static void 2033 fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result) 2034 { 2035 info->stats.fins += 1; 2036 2037 SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 | 2038 info->scsi.SCp.Status; 2039 2040 fas216_log_command(info, LOG_CONNECT, SCpnt, 2041 "command complete, result=0x%08x", SCpnt->result); 2042 2043 /* 2044 * If the driver detected an error, we're all done. 2045 */ 2046 if (host_byte(SCpnt->result) != DID_OK || 2047 msg_byte(SCpnt->result) != COMMAND_COMPLETE) 2048 goto done; 2049 2050 /* 2051 * If the command returned CHECK_CONDITION or COMMAND_TERMINATED 2052 * status, request the sense information. 2053 */ 2054 if (status_byte(SCpnt->result) == CHECK_CONDITION || 2055 status_byte(SCpnt->result) == COMMAND_TERMINATED) 2056 goto request_sense; 2057 2058 /* 2059 * If the command did not complete with GOOD status, 2060 * we are all done here. 2061 */ 2062 if (status_byte(SCpnt->result) != GOOD) 2063 goto done; 2064 2065 /* 2066 * We have successfully completed a command. Make sure that 2067 * we do not have any buffers left to transfer. The world 2068 * is not perfect, and we seem to occasionally hit this. 2069 * It can be indicative of a buggy driver, target or the upper 2070 * levels of the SCSI code. 2071 */ 2072 if (info->scsi.SCp.ptr) { 2073 switch (SCpnt->cmnd[0]) { 2074 case INQUIRY: 2075 case START_STOP: 2076 case MODE_SENSE: 2077 break; 2078 2079 default: 2080 scmd_printk(KERN_ERR, SCpnt, 2081 "incomplete data transfer detected: res=%08X ptr=%p len=%X\n", 2082 SCpnt->result, info->scsi.SCp.ptr, 2083 info->scsi.SCp.this_residual); 2084 scsi_print_command(SCpnt); 2085 set_host_byte(SCpnt, DID_ERROR); 2086 goto request_sense; 2087 } 2088 } 2089 2090 done: 2091 if (SCpnt->scsi_done) { 2092 SCpnt->scsi_done(SCpnt); 2093 return; 2094 } 2095 2096 panic("scsi%d.H: null scsi_done function in fas216_done", 2097 info->host->host_no); 2098 2099 2100 request_sense: 2101 if (SCpnt->cmnd[0] == REQUEST_SENSE) 2102 goto done; 2103 2104 scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0); 2105 fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, 2106 "requesting sense"); 2107 init_SCp(SCpnt); 2108 SCpnt->SCp.Message = 0; 2109 SCpnt->SCp.Status = 0; 2110 SCpnt->tag = 0; 2111 SCpnt->host_scribble = (void *)fas216_rq_sns_done; 2112 2113 /* 2114 * Place this command into the high priority "request 2115 * sense" slot. This will be the very next command 2116 * executed, unless a target connects to us. 2117 */ 2118 if (info->reqSCpnt) 2119 printk(KERN_WARNING "scsi%d.%c: losing request command\n", 2120 info->host->host_no, '0' + SCpnt->device->id); 2121 info->reqSCpnt = SCpnt; 2122 } 2123 2124 /** 2125 * fas216_done - complete processing for current command 2126 * @info: interface that completed 2127 * @result: driver byte of result 2128 * 2129 * Complete processing for current command 2130 */ 2131 static void fas216_done(FAS216_Info *info, unsigned int result) 2132 { 2133 void (*fn)(FAS216_Info *, struct scsi_cmnd *, unsigned int); 2134 struct scsi_cmnd *SCpnt; 2135 unsigned long flags; 2136 2137 fas216_checkmagic(info); 2138 2139 if (!info->SCpnt) 2140 goto no_command; 2141 2142 SCpnt = info->SCpnt; 2143 info->SCpnt = NULL; 2144 info->scsi.phase = PHASE_IDLE; 2145 2146 if (info->scsi.aborting) { 2147 fas216_log(info, 0, "uncaught abort - returning DID_ABORT"); 2148 result = DID_ABORT; 2149 info->scsi.aborting = 0; 2150 } 2151 2152 /* 2153 * Sanity check the completion - if we have zero bytes left 2154 * to transfer, we should not have a valid pointer. 2155 */ 2156 if (info->scsi.SCp.ptr && info->scsi.SCp.this_residual == 0) { 2157 scmd_printk(KERN_INFO, SCpnt, 2158 "zero bytes left to transfer, but buffer pointer still valid: ptr=%p len=%08x\n", 2159 info->scsi.SCp.ptr, info->scsi.SCp.this_residual); 2160 info->scsi.SCp.ptr = NULL; 2161 scsi_print_command(SCpnt); 2162 } 2163 2164 /* 2165 * Clear down this command as completed. If we need to request 2166 * the sense information, fas216_kick will re-assert the busy 2167 * status. 2168 */ 2169 info->device[SCpnt->device->id].parity_check = 0; 2170 clear_bit(SCpnt->device->id * 8 + 2171 (u8)(SCpnt->device->lun & 0x7), info->busyluns); 2172 2173 fn = (void (*)(FAS216_Info *, struct scsi_cmnd *, unsigned int))SCpnt->host_scribble; 2174 fn(info, SCpnt, result); 2175 2176 if (info->scsi.irq) { 2177 spin_lock_irqsave(&info->host_lock, flags); 2178 if (info->scsi.phase == PHASE_IDLE) 2179 fas216_kick(info); 2180 spin_unlock_irqrestore(&info->host_lock, flags); 2181 } 2182 return; 2183 2184 no_command: 2185 panic("scsi%d.H: null command in fas216_done", 2186 info->host->host_no); 2187 } 2188 2189 /** 2190 * fas216_queue_command - queue a command for adapter to process. 2191 * @SCpnt: Command to queue 2192 * @done: done function to call once command is complete 2193 * 2194 * Queue a command for adapter to process. 2195 * Returns: 0 on success, else error. 2196 * Notes: io_request_lock is held, interrupts are disabled. 2197 */ 2198 static int fas216_queue_command_lck(struct scsi_cmnd *SCpnt, 2199 void (*done)(struct scsi_cmnd *)) 2200 { 2201 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2202 int result; 2203 2204 fas216_checkmagic(info); 2205 2206 fas216_log_command(info, LOG_CONNECT, SCpnt, 2207 "received command (%p)", SCpnt); 2208 2209 SCpnt->scsi_done = done; 2210 SCpnt->host_scribble = (void *)fas216_std_done; 2211 SCpnt->result = 0; 2212 2213 init_SCp(SCpnt); 2214 2215 info->stats.queues += 1; 2216 SCpnt->tag = 0; 2217 2218 spin_lock(&info->host_lock); 2219 2220 /* 2221 * Add command into execute queue and let it complete under 2222 * whatever scheme we're using. 2223 */ 2224 result = !queue_add_cmd_ordered(&info->queues.issue, SCpnt); 2225 2226 /* 2227 * If we successfully added the command, 2228 * kick the interface to get it moving. 2229 */ 2230 if (result == 0 && info->scsi.phase == PHASE_IDLE) 2231 fas216_kick(info); 2232 spin_unlock(&info->host_lock); 2233 2234 fas216_log_target(info, LOG_CONNECT, -1, "queue %s", 2235 result ? "failure" : "success"); 2236 2237 return result; 2238 } 2239 2240 DEF_SCSI_QCMD(fas216_queue_command) 2241 2242 /** 2243 * fas216_internal_done - trigger restart of a waiting thread in fas216_noqueue_command 2244 * @SCpnt: Command to wake 2245 * 2246 * Trigger restart of a waiting thread in fas216_command 2247 */ 2248 static void fas216_internal_done(struct scsi_cmnd *SCpnt) 2249 { 2250 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2251 2252 fas216_checkmagic(info); 2253 2254 info->internal_done = 1; 2255 } 2256 2257 /** 2258 * fas216_noqueue_command - process a command for the adapter. 2259 * @SCpnt: Command to queue 2260 * 2261 * Queue a command for adapter to process. 2262 * Returns: scsi result code. 2263 * Notes: io_request_lock is held, interrupts are disabled. 2264 */ 2265 static int fas216_noqueue_command_lck(struct scsi_cmnd *SCpnt, 2266 void (*done)(struct scsi_cmnd *)) 2267 { 2268 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2269 2270 fas216_checkmagic(info); 2271 2272 /* 2273 * We should only be using this if we don't have an interrupt. 2274 * Provide some "incentive" to use the queueing code. 2275 */ 2276 BUG_ON(info->scsi.irq); 2277 2278 info->internal_done = 0; 2279 fas216_queue_command_lck(SCpnt, fas216_internal_done); 2280 2281 /* 2282 * This wastes time, since we can't return until the command is 2283 * complete. We can't sleep either since we may get re-entered! 2284 * However, we must re-enable interrupts, or else we'll be 2285 * waiting forever. 2286 */ 2287 spin_unlock_irq(info->host->host_lock); 2288 2289 while (!info->internal_done) { 2290 /* 2291 * If we don't have an IRQ, then we must poll the card for 2292 * it's interrupt, and use that to call this driver's 2293 * interrupt routine. That way, we keep the command 2294 * progressing. Maybe we can add some intelligence here 2295 * and go to sleep if we know that the device is going 2296 * to be some time (eg, disconnected). 2297 */ 2298 if (fas216_readb(info, REG_STAT) & STAT_INT) { 2299 spin_lock_irq(info->host->host_lock); 2300 fas216_intr(info); 2301 spin_unlock_irq(info->host->host_lock); 2302 } 2303 } 2304 2305 spin_lock_irq(info->host->host_lock); 2306 2307 done(SCpnt); 2308 2309 return 0; 2310 } 2311 2312 DEF_SCSI_QCMD(fas216_noqueue_command) 2313 2314 /* 2315 * Error handler timeout function. Indicate that we timed out, 2316 * and wake up any error handler process so it can continue. 2317 */ 2318 static void fas216_eh_timer(struct timer_list *t) 2319 { 2320 FAS216_Info *info = from_timer(info, t, eh_timer); 2321 2322 fas216_log(info, LOG_ERROR, "error handling timed out\n"); 2323 2324 del_timer(&info->eh_timer); 2325 2326 if (info->rst_bus_status == 0) 2327 info->rst_bus_status = -1; 2328 if (info->rst_dev_status == 0) 2329 info->rst_dev_status = -1; 2330 2331 wake_up(&info->eh_wait); 2332 } 2333 2334 enum res_find { 2335 res_failed, /* not found */ 2336 res_success, /* command on issue queue */ 2337 res_hw_abort /* command on disconnected dev */ 2338 }; 2339 2340 /** 2341 * fas216_do_abort - decide how to abort a command 2342 * @SCpnt: command to abort 2343 * 2344 * Decide how to abort a command. 2345 * Returns: abort status 2346 */ 2347 static enum res_find fas216_find_command(FAS216_Info *info, 2348 struct scsi_cmnd *SCpnt) 2349 { 2350 enum res_find res = res_failed; 2351 2352 if (queue_remove_cmd(&info->queues.issue, SCpnt)) { 2353 /* 2354 * The command was on the issue queue, and has not been 2355 * issued yet. We can remove the command from the queue, 2356 * and acknowledge the abort. Neither the device nor the 2357 * interface know about the command. 2358 */ 2359 printk("on issue queue "); 2360 2361 res = res_success; 2362 } else if (queue_remove_cmd(&info->queues.disconnected, SCpnt)) { 2363 /* 2364 * The command was on the disconnected queue. We must 2365 * reconnect with the device if possible, and send it 2366 * an abort message. 2367 */ 2368 printk("on disconnected queue "); 2369 2370 res = res_hw_abort; 2371 } else if (info->SCpnt == SCpnt) { 2372 printk("executing "); 2373 2374 switch (info->scsi.phase) { 2375 /* 2376 * If the interface is idle, and the command is 'disconnectable', 2377 * then it is the same as on the disconnected queue. 2378 */ 2379 case PHASE_IDLE: 2380 if (info->scsi.disconnectable) { 2381 info->scsi.disconnectable = 0; 2382 info->SCpnt = NULL; 2383 res = res_hw_abort; 2384 } 2385 break; 2386 2387 default: 2388 break; 2389 } 2390 } else if (info->origSCpnt == SCpnt) { 2391 /* 2392 * The command will be executed next, but a command 2393 * is currently using the interface. This is similar to 2394 * being on the issue queue, except the busylun bit has 2395 * been set. 2396 */ 2397 info->origSCpnt = NULL; 2398 clear_bit(SCpnt->device->id * 8 + 2399 (u8)(SCpnt->device->lun & 0x7), info->busyluns); 2400 printk("waiting for execution "); 2401 res = res_success; 2402 } else 2403 printk("unknown "); 2404 2405 return res; 2406 } 2407 2408 /** 2409 * fas216_eh_abort - abort this command 2410 * @SCpnt: command to abort 2411 * 2412 * Abort this command. 2413 * Returns: FAILED if unable to abort 2414 * Notes: io_request_lock is taken, and irqs are disabled 2415 */ 2416 int fas216_eh_abort(struct scsi_cmnd *SCpnt) 2417 { 2418 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2419 int result = FAILED; 2420 2421 fas216_checkmagic(info); 2422 2423 info->stats.aborts += 1; 2424 2425 scmd_printk(KERN_WARNING, SCpnt, "abort command\n"); 2426 2427 print_debug_list(); 2428 fas216_dumpstate(info); 2429 2430 switch (fas216_find_command(info, SCpnt)) { 2431 /* 2432 * We found the command, and cleared it out. Either 2433 * the command is still known to be executing on the 2434 * target, or the busylun bit is not set. 2435 */ 2436 case res_success: 2437 scmd_printk(KERN_WARNING, SCpnt, "abort %p success\n", SCpnt); 2438 result = SUCCESS; 2439 break; 2440 2441 /* 2442 * We need to reconnect to the target and send it an 2443 * ABORT or ABORT_TAG message. We can only do this 2444 * if the bus is free. 2445 */ 2446 case res_hw_abort: 2447 2448 /* 2449 * We are unable to abort the command for some reason. 2450 */ 2451 default: 2452 case res_failed: 2453 scmd_printk(KERN_WARNING, SCpnt, "abort %p failed\n", SCpnt); 2454 break; 2455 } 2456 2457 return result; 2458 } 2459 2460 /** 2461 * fas216_eh_device_reset - Reset the device associated with this command 2462 * @SCpnt: command specifing device to reset 2463 * 2464 * Reset the device associated with this command. 2465 * Returns: FAILED if unable to reset. 2466 * Notes: We won't be re-entered, so we'll only have one device 2467 * reset on the go at one time. 2468 */ 2469 int fas216_eh_device_reset(struct scsi_cmnd *SCpnt) 2470 { 2471 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2472 unsigned long flags; 2473 int i, res = FAILED, target = SCpnt->device->id; 2474 2475 fas216_log(info, LOG_ERROR, "device reset for target %d", target); 2476 2477 spin_lock_irqsave(&info->host_lock, flags); 2478 2479 do { 2480 /* 2481 * If we are currently connected to a device, and 2482 * it is the device we want to reset, there is 2483 * nothing we can do here. Chances are it is stuck, 2484 * and we need a bus reset. 2485 */ 2486 if (info->SCpnt && !info->scsi.disconnectable && 2487 info->SCpnt->device->id == SCpnt->device->id) 2488 break; 2489 2490 /* 2491 * We're going to be resetting this device. Remove 2492 * all pending commands from the driver. By doing 2493 * so, we guarantee that we won't touch the command 2494 * structures except to process the reset request. 2495 */ 2496 queue_remove_all_target(&info->queues.issue, target); 2497 queue_remove_all_target(&info->queues.disconnected, target); 2498 if (info->origSCpnt && info->origSCpnt->device->id == target) 2499 info->origSCpnt = NULL; 2500 if (info->reqSCpnt && info->reqSCpnt->device->id == target) 2501 info->reqSCpnt = NULL; 2502 for (i = 0; i < 8; i++) 2503 clear_bit(target * 8 + i, info->busyluns); 2504 2505 /* 2506 * Hijack this SCSI command structure to send 2507 * a bus device reset message to this device. 2508 */ 2509 SCpnt->host_scribble = (void *)fas216_devicereset_done; 2510 2511 info->rst_dev_status = 0; 2512 info->rstSCpnt = SCpnt; 2513 2514 if (info->scsi.phase == PHASE_IDLE) 2515 fas216_kick(info); 2516 2517 mod_timer(&info->eh_timer, jiffies + 30 * HZ); 2518 spin_unlock_irqrestore(&info->host_lock, flags); 2519 2520 /* 2521 * Wait up to 30 seconds for the reset to complete. 2522 */ 2523 wait_event(info->eh_wait, info->rst_dev_status); 2524 2525 del_timer_sync(&info->eh_timer); 2526 spin_lock_irqsave(&info->host_lock, flags); 2527 info->rstSCpnt = NULL; 2528 2529 if (info->rst_dev_status == 1) 2530 res = SUCCESS; 2531 } while (0); 2532 2533 SCpnt->host_scribble = NULL; 2534 spin_unlock_irqrestore(&info->host_lock, flags); 2535 2536 fas216_log(info, LOG_ERROR, "device reset complete: %s\n", 2537 res == SUCCESS ? "success" : "failed"); 2538 2539 return res; 2540 } 2541 2542 /** 2543 * fas216_eh_bus_reset - Reset the bus associated with the command 2544 * @SCpnt: command specifing bus to reset 2545 * 2546 * Reset the bus associated with the command. 2547 * Returns: FAILED if unable to reset. 2548 * Notes: Further commands are blocked. 2549 */ 2550 int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt) 2551 { 2552 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2553 unsigned long flags; 2554 struct scsi_device *SDpnt; 2555 2556 fas216_checkmagic(info); 2557 fas216_log(info, LOG_ERROR, "resetting bus"); 2558 2559 info->stats.bus_resets += 1; 2560 2561 spin_lock_irqsave(&info->host_lock, flags); 2562 2563 /* 2564 * Stop all activity on this interface. 2565 */ 2566 fas216_aborttransfer(info); 2567 fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]); 2568 2569 /* 2570 * Clear any pending interrupts. 2571 */ 2572 while (fas216_readb(info, REG_STAT) & STAT_INT) 2573 fas216_readb(info, REG_INST); 2574 2575 info->rst_bus_status = 0; 2576 2577 /* 2578 * For each attached hard-reset device, clear out 2579 * all command structures. Leave the running 2580 * command in place. 2581 */ 2582 shost_for_each_device(SDpnt, info->host) { 2583 int i; 2584 2585 if (SDpnt->soft_reset) 2586 continue; 2587 2588 queue_remove_all_target(&info->queues.issue, SDpnt->id); 2589 queue_remove_all_target(&info->queues.disconnected, SDpnt->id); 2590 if (info->origSCpnt && info->origSCpnt->device->id == SDpnt->id) 2591 info->origSCpnt = NULL; 2592 if (info->reqSCpnt && info->reqSCpnt->device->id == SDpnt->id) 2593 info->reqSCpnt = NULL; 2594 info->SCpnt = NULL; 2595 2596 for (i = 0; i < 8; i++) 2597 clear_bit(SDpnt->id * 8 + i, info->busyluns); 2598 } 2599 2600 info->scsi.phase = PHASE_IDLE; 2601 2602 /* 2603 * Reset the SCSI bus. Device cleanup happens in 2604 * the interrupt handler. 2605 */ 2606 fas216_cmd(info, CMD_RESETSCSI); 2607 2608 mod_timer(&info->eh_timer, jiffies + HZ); 2609 spin_unlock_irqrestore(&info->host_lock, flags); 2610 2611 /* 2612 * Wait one second for the interrupt. 2613 */ 2614 wait_event(info->eh_wait, info->rst_bus_status); 2615 del_timer_sync(&info->eh_timer); 2616 2617 fas216_log(info, LOG_ERROR, "bus reset complete: %s\n", 2618 info->rst_bus_status == 1 ? "success" : "failed"); 2619 2620 return info->rst_bus_status == 1 ? SUCCESS : FAILED; 2621 } 2622 2623 /** 2624 * fas216_init_chip - Initialise FAS216 state after reset 2625 * @info: state structure for interface 2626 * 2627 * Initialise FAS216 state after reset 2628 */ 2629 static void fas216_init_chip(FAS216_Info *info) 2630 { 2631 unsigned int clock = ((info->ifcfg.clockrate - 1) / 5 + 1) & 7; 2632 fas216_writeb(info, REG_CLKF, clock); 2633 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); 2634 fas216_writeb(info, REG_CNTL2, info->scsi.cfg[1]); 2635 fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]); 2636 fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); 2637 fas216_writeb(info, REG_SOF, 0); 2638 fas216_writeb(info, REG_STP, info->scsi.async_stp); 2639 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); 2640 } 2641 2642 /** 2643 * fas216_eh_host_reset - Reset the host associated with this command 2644 * @SCpnt: command specifing host to reset 2645 * 2646 * Reset the host associated with this command. 2647 * Returns: FAILED if unable to reset. 2648 * Notes: io_request_lock is taken, and irqs are disabled 2649 */ 2650 int fas216_eh_host_reset(struct scsi_cmnd *SCpnt) 2651 { 2652 FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; 2653 2654 spin_lock_irq(info->host->host_lock); 2655 2656 fas216_checkmagic(info); 2657 2658 fas216_log(info, LOG_ERROR, "resetting host"); 2659 2660 /* 2661 * Reset the SCSI chip. 2662 */ 2663 fas216_cmd(info, CMD_RESETCHIP); 2664 2665 /* 2666 * Ugly ugly ugly! 2667 * We need to release the host_lock and enable 2668 * IRQs if we sleep, but we must relock and disable 2669 * IRQs after the sleep. 2670 */ 2671 spin_unlock_irq(info->host->host_lock); 2672 msleep(50 * 1000/100); 2673 spin_lock_irq(info->host->host_lock); 2674 2675 /* 2676 * Release the SCSI reset. 2677 */ 2678 fas216_cmd(info, CMD_NOP); 2679 2680 fas216_init_chip(info); 2681 2682 spin_unlock_irq(info->host->host_lock); 2683 return SUCCESS; 2684 } 2685 2686 #define TYPE_UNKNOWN 0 2687 #define TYPE_NCR53C90 1 2688 #define TYPE_NCR53C90A 2 2689 #define TYPE_NCR53C9x 3 2690 #define TYPE_Am53CF94 4 2691 #define TYPE_EmFAS216 5 2692 #define TYPE_QLFAS216 6 2693 2694 static char *chip_types[] = { 2695 "unknown", 2696 "NS NCR53C90", 2697 "NS NCR53C90A", 2698 "NS NCR53C9x", 2699 "AMD Am53CF94", 2700 "Emulex FAS216", 2701 "QLogic FAS216" 2702 }; 2703 2704 static int fas216_detect_type(FAS216_Info *info) 2705 { 2706 int family, rev; 2707 2708 /* 2709 * Reset the chip. 2710 */ 2711 fas216_writeb(info, REG_CMD, CMD_RESETCHIP); 2712 udelay(50); 2713 fas216_writeb(info, REG_CMD, CMD_NOP); 2714 2715 /* 2716 * Check to see if control reg 2 is present. 2717 */ 2718 fas216_writeb(info, REG_CNTL3, 0); 2719 fas216_writeb(info, REG_CNTL2, CNTL2_S2FE); 2720 2721 /* 2722 * If we are unable to read back control reg 2 2723 * correctly, it is not present, and we have a 2724 * NCR53C90. 2725 */ 2726 if ((fas216_readb(info, REG_CNTL2) & (~0xe0)) != CNTL2_S2FE) 2727 return TYPE_NCR53C90; 2728 2729 /* 2730 * Now, check control register 3 2731 */ 2732 fas216_writeb(info, REG_CNTL2, 0); 2733 fas216_writeb(info, REG_CNTL3, 0); 2734 fas216_writeb(info, REG_CNTL3, 5); 2735 2736 /* 2737 * If we are unable to read the register back 2738 * correctly, we have a NCR53C90A 2739 */ 2740 if (fas216_readb(info, REG_CNTL3) != 5) 2741 return TYPE_NCR53C90A; 2742 2743 /* 2744 * Now read the ID from the chip. 2745 */ 2746 fas216_writeb(info, REG_CNTL3, 0); 2747 2748 fas216_writeb(info, REG_CNTL3, CNTL3_ADIDCHK); 2749 fas216_writeb(info, REG_CNTL3, 0); 2750 2751 fas216_writeb(info, REG_CMD, CMD_RESETCHIP); 2752 udelay(50); 2753 fas216_writeb(info, REG_CMD, CMD_WITHDMA | CMD_NOP); 2754 2755 fas216_writeb(info, REG_CNTL2, CNTL2_ENF); 2756 fas216_writeb(info, REG_CMD, CMD_RESETCHIP); 2757 udelay(50); 2758 fas216_writeb(info, REG_CMD, CMD_NOP); 2759 2760 rev = fas216_readb(info, REG_ID); 2761 family = rev >> 3; 2762 rev &= 7; 2763 2764 switch (family) { 2765 case 0x01: 2766 if (rev == 4) 2767 return TYPE_Am53CF94; 2768 break; 2769 2770 case 0x02: 2771 switch (rev) { 2772 case 2: 2773 return TYPE_EmFAS216; 2774 case 3: 2775 return TYPE_QLFAS216; 2776 } 2777 break; 2778 2779 default: 2780 break; 2781 } 2782 printk("family %x rev %x\n", family, rev); 2783 return TYPE_NCR53C9x; 2784 } 2785 2786 /** 2787 * fas216_reset_state - Initialise driver internal state 2788 * @info: state to initialise 2789 * 2790 * Initialise driver internal state 2791 */ 2792 static void fas216_reset_state(FAS216_Info *info) 2793 { 2794 int i; 2795 2796 fas216_checkmagic(info); 2797 2798 fas216_bus_reset(info); 2799 2800 /* 2801 * Clear out all stale info in our state structure 2802 */ 2803 memset(info->busyluns, 0, sizeof(info->busyluns)); 2804 info->scsi.disconnectable = 0; 2805 info->scsi.aborting = 0; 2806 2807 for (i = 0; i < 8; i++) { 2808 info->device[i].parity_enabled = 0; 2809 info->device[i].parity_check = 1; 2810 } 2811 2812 /* 2813 * Drain all commands on disconnected queue 2814 */ 2815 while (queue_remove(&info->queues.disconnected) != NULL); 2816 2817 /* 2818 * Remove executing commands. 2819 */ 2820 info->SCpnt = NULL; 2821 info->reqSCpnt = NULL; 2822 info->rstSCpnt = NULL; 2823 info->origSCpnt = NULL; 2824 } 2825 2826 /** 2827 * fas216_init - initialise FAS/NCR/AMD SCSI structures. 2828 * @host: a driver-specific filled-out structure 2829 * 2830 * Initialise FAS/NCR/AMD SCSI structures. 2831 * Returns: 0 on success 2832 */ 2833 int fas216_init(struct Scsi_Host *host) 2834 { 2835 FAS216_Info *info = (FAS216_Info *)host->hostdata; 2836 2837 info->magic_start = MAGIC; 2838 info->magic_end = MAGIC; 2839 info->host = host; 2840 info->scsi.cfg[0] = host->this_id | CNTL1_PERE; 2841 info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE; 2842 info->scsi.cfg[2] = info->ifcfg.cntl3 | 2843 CNTL3_ADIDCHK | CNTL3_QTAG | CNTL3_G2CB | CNTL3_LBTM; 2844 info->scsi.async_stp = fas216_syncperiod(info, info->ifcfg.asyncperiod); 2845 2846 info->rst_dev_status = -1; 2847 info->rst_bus_status = -1; 2848 init_waitqueue_head(&info->eh_wait); 2849 timer_setup(&info->eh_timer, fas216_eh_timer, 0); 2850 2851 spin_lock_init(&info->host_lock); 2852 2853 memset(&info->stats, 0, sizeof(info->stats)); 2854 2855 msgqueue_initialise(&info->scsi.msgs); 2856 2857 if (!queue_initialise(&info->queues.issue)) 2858 return -ENOMEM; 2859 2860 if (!queue_initialise(&info->queues.disconnected)) { 2861 queue_free(&info->queues.issue); 2862 return -ENOMEM; 2863 } 2864 2865 return 0; 2866 } 2867 2868 /** 2869 * fas216_add - initialise FAS/NCR/AMD SCSI ic. 2870 * @host: a driver-specific filled-out structure 2871 * @dev: parent device 2872 * 2873 * Initialise FAS/NCR/AMD SCSI ic. 2874 * Returns: 0 on success 2875 */ 2876 int fas216_add(struct Scsi_Host *host, struct device *dev) 2877 { 2878 FAS216_Info *info = (FAS216_Info *)host->hostdata; 2879 int type, ret; 2880 2881 if (info->ifcfg.clockrate <= 10 || info->ifcfg.clockrate > 40) { 2882 printk(KERN_CRIT "fas216: invalid clock rate %u MHz\n", 2883 info->ifcfg.clockrate); 2884 return -EINVAL; 2885 } 2886 2887 fas216_reset_state(info); 2888 type = fas216_detect_type(info); 2889 info->scsi.type = chip_types[type]; 2890 2891 udelay(300); 2892 2893 /* 2894 * Initialise the chip correctly. 2895 */ 2896 fas216_init_chip(info); 2897 2898 /* 2899 * Reset the SCSI bus. We don't want to see 2900 * the resulting reset interrupt, so mask it 2901 * out. 2902 */ 2903 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_DISR); 2904 fas216_writeb(info, REG_CMD, CMD_RESETSCSI); 2905 2906 /* 2907 * scsi standard says wait 250ms 2908 */ 2909 spin_unlock_irq(info->host->host_lock); 2910 msleep(100*1000/100); 2911 spin_lock_irq(info->host->host_lock); 2912 2913 fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); 2914 fas216_readb(info, REG_INST); 2915 2916 fas216_checkmagic(info); 2917 2918 ret = scsi_add_host(host, dev); 2919 if (ret) 2920 fas216_writeb(info, REG_CMD, CMD_RESETCHIP); 2921 else 2922 scsi_scan_host(host); 2923 2924 return ret; 2925 } 2926 2927 void fas216_remove(struct Scsi_Host *host) 2928 { 2929 FAS216_Info *info = (FAS216_Info *)host->hostdata; 2930 2931 fas216_checkmagic(info); 2932 scsi_remove_host(host); 2933 2934 fas216_writeb(info, REG_CMD, CMD_RESETCHIP); 2935 scsi_host_put(host); 2936 } 2937 2938 /** 2939 * fas216_release - release all resources for FAS/NCR/AMD SCSI ic. 2940 * @host: a driver-specific filled-out structure 2941 * 2942 * release all resources and put everything to bed for FAS/NCR/AMD SCSI ic. 2943 */ 2944 void fas216_release(struct Scsi_Host *host) 2945 { 2946 FAS216_Info *info = (FAS216_Info *)host->hostdata; 2947 2948 queue_free(&info->queues.disconnected); 2949 queue_free(&info->queues.issue); 2950 } 2951 2952 void fas216_print_host(FAS216_Info *info, struct seq_file *m) 2953 { 2954 seq_printf(m, 2955 "\n" 2956 "Chip : %s\n" 2957 " Address: 0x%p\n" 2958 " IRQ : %d\n" 2959 " DMA : %d\n", 2960 info->scsi.type, info->scsi.io_base, 2961 info->scsi.irq, info->scsi.dma); 2962 } 2963 2964 void fas216_print_stats(FAS216_Info *info, struct seq_file *m) 2965 { 2966 seq_printf(m, "\n" 2967 "Command Statistics:\n" 2968 " Queued : %u\n" 2969 " Issued : %u\n" 2970 " Completed : %u\n" 2971 " Reads : %u\n" 2972 " Writes : %u\n" 2973 " Others : %u\n" 2974 " Disconnects: %u\n" 2975 " Aborts : %u\n" 2976 " Bus resets : %u\n" 2977 " Host resets: %u\n", 2978 info->stats.queues, info->stats.removes, 2979 info->stats.fins, info->stats.reads, 2980 info->stats.writes, info->stats.miscs, 2981 info->stats.disconnects, info->stats.aborts, 2982 info->stats.bus_resets, info->stats.host_resets); 2983 } 2984 2985 void fas216_print_devices(FAS216_Info *info, struct seq_file *m) 2986 { 2987 struct fas216_device *dev; 2988 struct scsi_device *scd; 2989 2990 seq_puts(m, "Device/Lun TaggedQ Parity Sync\n"); 2991 2992 shost_for_each_device(scd, info->host) { 2993 dev = &info->device[scd->id]; 2994 seq_printf(m, " %d/%llu ", scd->id, scd->lun); 2995 if (scd->tagged_supported) 2996 seq_printf(m, "%3sabled(%3d) ", 2997 scd->simple_tags ? "en" : "dis", 2998 scd->current_tag); 2999 else 3000 seq_puts(m, "unsupported "); 3001 3002 seq_printf(m, "%3sabled ", dev->parity_enabled ? "en" : "dis"); 3003 3004 if (dev->sof) 3005 seq_printf(m, "offset %d, %d ns\n", 3006 dev->sof, dev->period * 4); 3007 else 3008 seq_puts(m, "async\n"); 3009 } 3010 } 3011 3012 EXPORT_SYMBOL(fas216_init); 3013 EXPORT_SYMBOL(fas216_add); 3014 EXPORT_SYMBOL(fas216_queue_command); 3015 EXPORT_SYMBOL(fas216_noqueue_command); 3016 EXPORT_SYMBOL(fas216_intr); 3017 EXPORT_SYMBOL(fas216_remove); 3018 EXPORT_SYMBOL(fas216_release); 3019 EXPORT_SYMBOL(fas216_eh_abort); 3020 EXPORT_SYMBOL(fas216_eh_device_reset); 3021 EXPORT_SYMBOL(fas216_eh_bus_reset); 3022 EXPORT_SYMBOL(fas216_eh_host_reset); 3023 EXPORT_SYMBOL(fas216_print_host); 3024 EXPORT_SYMBOL(fas216_print_stats); 3025 EXPORT_SYMBOL(fas216_print_devices); 3026 3027 MODULE_AUTHOR("Russell King"); 3028 MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core"); 3029 MODULE_LICENSE("GPL"); 3030