1// SPDX-License-Identifier: GPL-2.0-or-later 2/************************************************************************** 3 * Initio 9100 device driver for Linux. 4 * 5 * Copyright (c) 1994-1998 Initio Corporation 6 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl> 7 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de> 8 * Copyright (c) 2007 Red Hat 9 * 10 ************************************************************************* 11 * 12 * DESCRIPTION: 13 * 14 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host 15 * adapters 16 * 17 * 08/06/97 hc - v1.01h 18 * - Support inic-940 and inic-935 19 * 09/26/97 hc - v1.01i 20 * - Make correction from J.W. Schultz suggestion 21 * 10/13/97 hc - Support reset function 22 * 10/21/97 hc - v1.01j 23 * - Support 32 LUN (SCSI 3) 24 * 01/14/98 hc - v1.01k 25 * - Fix memory allocation problem 26 * 03/04/98 hc - v1.01l 27 * - Fix tape rewind which will hang the system problem 28 * - Set can_queue to initio_num_scb 29 * 06/25/98 hc - v1.01m 30 * - Get it work for kernel version >= 2.1.75 31 * - Dynamic assign SCSI bus reset holding time in initio_init() 32 * 07/02/98 hc - v1.01n 33 * - Support 0002134A 34 * 08/07/98 hc - v1.01o 35 * - Change the initio_abort_srb routine to use scsi_done. <01> 36 * 09/07/98 hl - v1.02 37 * - Change the INI9100U define and proc_dir_entry to 38 * reflect the newer Kernel 2.1.118, but the v1.o1o 39 * should work with Kernel 2.1.118. 40 * 09/20/98 wh - v1.02a 41 * - Support Abort command. 42 * - Handle reset routine. 43 * 09/21/98 hl - v1.03 44 * - remove comments. 45 * 12/09/98 bv - v1.03a 46 * - Removed unused code 47 * 12/13/98 bv - v1.03b 48 * - Remove cli() locking for kernels >= 2.1.95. This uses 49 * spinlocks to serialize access to the pSRB_head and 50 * pSRB_tail members of the HCS structure. 51 * 09/01/99 bv - v1.03d 52 * - Fixed a deadlock problem in SMP. 53 * 21/01/99 bv - v1.03e 54 * - Add support for the Domex 3192U PCI SCSI 55 * This is a slightly modified patch by 56 * Brian Macy <bmacy@sunshinecomputing.com> 57 * 22/02/99 bv - v1.03f 58 * - Didn't detect the INIC-950 in 2.0.x correctly. 59 * Now fixed. 60 * 05/07/99 bv - v1.03g 61 * - Changed the assumption that HZ = 100 62 * 10/17/03 mc - v1.04 63 * - added new DMA API support 64 * 06/01/04 jmd - v1.04a 65 * - Re-add reset_bus support 66 **************************************************************************/ 67 68#include <linux/module.h> 69#include <linux/errno.h> 70#include <linux/delay.h> 71#include <linux/pci.h> 72#include <linux/init.h> 73#include <linux/blkdev.h> 74#include <linux/spinlock.h> 75#include <linux/stat.h> 76#include <linux/kernel.h> 77#include <linux/proc_fs.h> 78#include <linux/string.h> 79#include <linux/interrupt.h> 80#include <linux/ioport.h> 81#include <linux/slab.h> 82#include <linux/jiffies.h> 83#include <linux/dma-mapping.h> 84#include <asm/io.h> 85 86#include <scsi/scsi.h> 87#include <scsi/scsi_cmnd.h> 88#include <scsi/scsi_device.h> 89#include <scsi/scsi_host.h> 90#include <scsi/scsi_tcq.h> 91 92#include "initio.h" 93 94#define SENSE_SIZE 14 95 96#define i91u_MAXQUEUE 2 97#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a" 98 99#ifdef DEBUG_i91u 100static unsigned int i91u_debug = DEBUG_DEFAULT; 101#endif 102 103static int initio_tag_enable = 1; 104 105#ifdef DEBUG_i91u 106static int setup_debug = 0; 107#endif 108 109static void i91uSCBPost(u8 * pHcb, u8 * pScb); 110 111#define DEBUG_INTERRUPT 0 112#define DEBUG_QUEUE 0 113#define DEBUG_STATE 0 114#define INT_DISC 0 115 116/*--- forward references ---*/ 117static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun); 118static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host); 119 120static int tulip_main(struct initio_host * host); 121 122static int initio_next_state(struct initio_host * host); 123static int initio_state_1(struct initio_host * host); 124static int initio_state_2(struct initio_host * host); 125static int initio_state_3(struct initio_host * host); 126static int initio_state_4(struct initio_host * host); 127static int initio_state_5(struct initio_host * host); 128static int initio_state_6(struct initio_host * host); 129static int initio_state_7(struct initio_host * host); 130static int initio_xfer_data_in(struct initio_host * host); 131static int initio_xfer_data_out(struct initio_host * host); 132static int initio_xpad_in(struct initio_host * host); 133static int initio_xpad_out(struct initio_host * host); 134static int initio_status_msg(struct initio_host * host); 135 136static int initio_msgin(struct initio_host * host); 137static int initio_msgin_sync(struct initio_host * host); 138static int initio_msgin_accept(struct initio_host * host); 139static int initio_msgout_reject(struct initio_host * host); 140static int initio_msgin_extend(struct initio_host * host); 141 142static int initio_msgout_ide(struct initio_host * host); 143static int initio_msgout_abort_targ(struct initio_host * host); 144static int initio_msgout_abort_tag(struct initio_host * host); 145 146static int initio_bus_device_reset(struct initio_host * host); 147static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb); 148static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb); 149static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb); 150static int int_initio_busfree(struct initio_host * host); 151static int int_initio_scsi_rst(struct initio_host * host); 152static int int_initio_bad_seq(struct initio_host * host); 153static int int_initio_resel(struct initio_host * host); 154static int initio_sync_done(struct initio_host * host); 155static int wdtr_done(struct initio_host * host); 156static int wait_tulip(struct initio_host * host); 157static int initio_wait_done_disc(struct initio_host * host); 158static int initio_wait_disc(struct initio_host * host); 159static void tulip_scsi(struct initio_host * host); 160static int initio_post_scsi_rst(struct initio_host * host); 161 162static void initio_se2_ew_en(unsigned long base); 163static void initio_se2_ew_ds(unsigned long base); 164static int initio_se2_rd_all(unsigned long base); 165static void initio_se2_update_all(unsigned long base); /* setup default pattern */ 166static void initio_read_eeprom(unsigned long base); 167 168/* ---- INTERNAL VARIABLES ---- */ 169 170static NVRAM i91unvram; 171static NVRAM *i91unvramp; 172 173static u8 i91udftNvRam[64] = 174{ 175 /*----------- header -----------*/ 176 0x25, 0xc9, /* Signature */ 177 0x40, /* Size */ 178 0x01, /* Revision */ 179 /* -- Host Adapter Structure -- */ 180 0x95, /* ModelByte0 */ 181 0x00, /* ModelByte1 */ 182 0x00, /* ModelInfo */ 183 0x01, /* NumOfCh */ 184 NBC1_DEFAULT, /* BIOSConfig1 */ 185 0, /* BIOSConfig2 */ 186 0, /* HAConfig1 */ 187 0, /* HAConfig2 */ 188 /* SCSI channel 0 and target Structure */ 189 7, /* SCSIid */ 190 NCC1_DEFAULT, /* SCSIconfig1 */ 191 0, /* SCSIconfig2 */ 192 0x10, /* NumSCSItarget */ 193 194 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 195 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 196 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 197 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 198 199 /* SCSI channel 1 and target Structure */ 200 7, /* SCSIid */ 201 NCC1_DEFAULT, /* SCSIconfig1 */ 202 0, /* SCSIconfig2 */ 203 0x10, /* NumSCSItarget */ 204 205 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 206 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 207 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 208 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, 209 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 210 0, 0}; /* - CheckSum - */ 211 212 213static u8 initio_rate_tbl[8] = /* fast 20 */ 214{ 215 /* nanosecond divide by 4 */ 216 12, /* 50ns, 20M */ 217 18, /* 75ns, 13.3M */ 218 25, /* 100ns, 10M */ 219 31, /* 125ns, 8M */ 220 37, /* 150ns, 6.6M */ 221 43, /* 175ns, 5.7M */ 222 50, /* 200ns, 5M */ 223 62 /* 250ns, 4M */ 224}; 225 226static void initio_do_pause(unsigned amount) 227{ 228 /* Pause for amount jiffies */ 229 unsigned long the_time = jiffies + amount; 230 231 while (time_before_eq(jiffies, the_time)) 232 cpu_relax(); 233} 234 235/*-- forward reference --*/ 236 237/****************************************************************** 238 Input: instruction for Serial E2PROM 239 240 EX: se2_rd(0 call se2_instr() to send address and read command 241 242 StartBit OP_Code Address Data 243 --------- -------- ------------------ ------- 244 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0 245 246 +----------------------------------------------------- 247 | 248 CS -----+ 249 +--+ +--+ +--+ +--+ +--+ 250 ^ | ^ | ^ | ^ | ^ | 251 | | | | | | | | | | 252 CLK -------+ +--+ +--+ +--+ +--+ +-- 253 (leading edge trigger) 254 255 +--1-----1--+ 256 | SB OP | OP A5 A4 257 DI ----+ +--0------------------ 258 (address and cmd sent to nvram) 259 260 -------------------------------------------+ 261 | 262 DO +--- 263 (data sent from nvram) 264 265 266******************************************************************/ 267 268/** 269 * initio_se2_instr - bitbang an instruction 270 * @base: Base of InitIO controller 271 * @instr: Instruction for serial E2PROM 272 * 273 * Bitbang an instruction out to the serial E2Prom 274 */ 275 276static void initio_se2_instr(unsigned long base, u8 instr) 277{ 278 int i; 279 u8 b; 280 281 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */ 282 udelay(30); 283 outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */ 284 udelay(30); 285 286 for (i = 0; i < 8; i++) { 287 if (instr & 0x80) 288 b = SE2CS | SE2DO; /* -CLK+dataBit */ 289 else 290 b = SE2CS; /* -CLK */ 291 outb(b, base + TUL_NVRAM); 292 udelay(30); 293 outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */ 294 udelay(30); 295 instr <<= 1; 296 } 297 outb(SE2CS, base + TUL_NVRAM); /* -CLK */ 298 udelay(30); 299} 300 301 302/** 303 * initio_se2_ew_en - Enable erase/write 304 * @base: Base address of InitIO controller 305 * 306 * Enable erase/write state of serial EEPROM 307 */ 308void initio_se2_ew_en(unsigned long base) 309{ 310 initio_se2_instr(base, 0x30); /* EWEN */ 311 outb(0, base + TUL_NVRAM); /* -CS */ 312 udelay(30); 313} 314 315 316/** 317 * initio_se2_ew_ds - Disable erase/write 318 * @base: Base address of InitIO controller 319 * 320 * Disable erase/write state of serial EEPROM 321 */ 322void initio_se2_ew_ds(unsigned long base) 323{ 324 initio_se2_instr(base, 0); /* EWDS */ 325 outb(0, base + TUL_NVRAM); /* -CS */ 326 udelay(30); 327} 328 329 330/** 331 * initio_se2_rd - read E2PROM word 332 * @base: Base of InitIO controller 333 * @addr: Address of word in E2PROM 334 * 335 * Read a word from the NV E2PROM device 336 */ 337static u16 initio_se2_rd(unsigned long base, u8 addr) 338{ 339 u8 instr, rb; 340 u16 val = 0; 341 int i; 342 343 instr = (u8) (addr | 0x80); 344 initio_se2_instr(base, instr); /* READ INSTR */ 345 346 for (i = 15; i >= 0; i--) { 347 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */ 348 udelay(30); 349 outb(SE2CS, base + TUL_NVRAM); /* -CLK */ 350 351 /* sample data after the following edge of clock */ 352 rb = inb(base + TUL_NVRAM); 353 rb &= SE2DI; 354 val += (rb << i); 355 udelay(30); /* 6/20/95 */ 356 } 357 358 outb(0, base + TUL_NVRAM); /* no chip select */ 359 udelay(30); 360 return val; 361} 362 363/** 364 * initio_se2_wr - read E2PROM word 365 * @base: Base of InitIO controller 366 * @addr: Address of word in E2PROM 367 * @val: Value to write 368 * 369 * Write a word to the NV E2PROM device. Used when recovering from 370 * a problem with the NV. 371 */ 372static void initio_se2_wr(unsigned long base, u8 addr, u16 val) 373{ 374 u8 instr; 375 int i; 376 377 instr = (u8) (addr | 0x40); 378 initio_se2_instr(base, instr); /* WRITE INSTR */ 379 for (i = 15; i >= 0; i--) { 380 if (val & 0x8000) 381 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */ 382 else 383 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */ 384 udelay(30); 385 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */ 386 udelay(30); 387 val <<= 1; 388 } 389 outb(SE2CS, base + TUL_NVRAM); /* -CLK */ 390 udelay(30); 391 outb(0, base + TUL_NVRAM); /* -CS */ 392 udelay(30); 393 394 outb(SE2CS, base + TUL_NVRAM); /* +CS */ 395 udelay(30); 396 397 for (;;) { 398 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */ 399 udelay(30); 400 outb(SE2CS, base + TUL_NVRAM); /* -CLK */ 401 udelay(30); 402 if (inb(base + TUL_NVRAM) & SE2DI) 403 break; /* write complete */ 404 } 405 outb(0, base + TUL_NVRAM); /* -CS */ 406} 407 408/** 409 * initio_se2_rd_all - read hostadapter NV configuration 410 * @base: Base address of InitIO controller 411 * 412 * Reads the E2PROM data into main memory. Ensures that the checksum 413 * and header marker are valid. Returns 1 on success -1 on error. 414 */ 415 416static int initio_se2_rd_all(unsigned long base) 417{ 418 int i; 419 u16 chksum = 0; 420 u16 *np; 421 422 i91unvramp = &i91unvram; 423 np = (u16 *) i91unvramp; 424 for (i = 0; i < 32; i++) 425 *np++ = initio_se2_rd(base, i); 426 427 /* Is signature "ini" ok ? */ 428 if (i91unvramp->NVM_Signature != INI_SIGNATURE) 429 return -1; 430 /* Is ckecksum ok ? */ 431 np = (u16 *) i91unvramp; 432 for (i = 0; i < 31; i++) 433 chksum += *np++; 434 if (i91unvramp->NVM_CheckSum != chksum) 435 return -1; 436 return 1; 437} 438 439/** 440 * initio_se2_update_all - Update E2PROM 441 * @base: Base of InitIO controller 442 * 443 * Update the E2PROM by wrting any changes into the E2PROM 444 * chip, rewriting the checksum. 445 */ 446static void initio_se2_update_all(unsigned long base) 447{ /* setup default pattern */ 448 int i; 449 u16 chksum = 0; 450 u16 *np, *np1; 451 452 i91unvramp = &i91unvram; 453 /* Calculate checksum first */ 454 np = (u16 *) i91udftNvRam; 455 for (i = 0; i < 31; i++) 456 chksum += *np++; 457 *np = chksum; 458 initio_se2_ew_en(base); /* Enable write */ 459 460 np = (u16 *) i91udftNvRam; 461 np1 = (u16 *) i91unvramp; 462 for (i = 0; i < 32; i++, np++, np1++) { 463 if (*np != *np1) 464 initio_se2_wr(base, i, *np); 465 } 466 initio_se2_ew_ds(base); /* Disable write */ 467} 468 469/** 470 * initio_read_eeprom - Retrieve configuration 471 * @base: Base of InitIO Host Adapter 472 * 473 * Retrieve the host adapter configuration data from E2Prom. If the 474 * data is invalid then the defaults are used and are also restored 475 * into the E2PROM. This forms the access point for the SCSI driver 476 * into the E2PROM layer, the other functions for the E2PROM are all 477 * internal use. 478 * 479 * Must be called single threaded, uses a shared global area. 480 */ 481 482static void initio_read_eeprom(unsigned long base) 483{ 484 u8 gctrl; 485 486 i91unvramp = &i91unvram; 487 /* Enable EEProm programming */ 488 gctrl = inb(base + TUL_GCTRL); 489 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL); 490 if (initio_se2_rd_all(base) != 1) { 491 initio_se2_update_all(base); /* setup default pattern */ 492 initio_se2_rd_all(base); /* load again */ 493 } 494 /* Disable EEProm programming */ 495 gctrl = inb(base + TUL_GCTRL); 496 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL); 497} 498 499/** 500 * initio_stop_bm - stop bus master 501 * @host: InitIO we are stopping 502 * 503 * Stop any pending DMA operation, aborting the DMA if necessary 504 */ 505 506static void initio_stop_bm(struct initio_host * host) 507{ 508 509 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */ 510 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd); 511 /* wait Abort DMA xfer done */ 512 while ((inb(host->addr + TUL_Int) & XABT) == 0) 513 cpu_relax(); 514 } 515 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 516} 517 518/** 519 * initio_reset_scsi - Reset SCSI host controller 520 * @host: InitIO host to reset 521 * @seconds: Recovery time 522 * 523 * Perform a full reset of the SCSI subsystem. 524 */ 525 526static int initio_reset_scsi(struct initio_host * host, int seconds) 527{ 528 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0); 529 530 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT)) 531 cpu_relax(); 532 533 /* reset tulip chip */ 534 outb(0, host->addr + TUL_SSignal); 535 536 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */ 537 /* SONY 5200 tape drive won't work if only stall for 1 sec */ 538 /* FIXME: this is a very long busy wait right now */ 539 initio_do_pause(seconds * HZ); 540 541 inb(host->addr + TUL_SInt); 542 return SCSI_RESET_SUCCESS; 543} 544 545/** 546 * initio_init - set up an InitIO host adapter 547 * @host: InitIO host adapter 548 * @bios_addr: BIOS address 549 * 550 * Set up the host adapter and devices according to the configuration 551 * retrieved from the E2PROM. 552 * 553 * Locking: Calls E2PROM layer code which is not re-enterable so must 554 * run single threaded for now. 555 */ 556 557static void initio_init(struct initio_host * host, u8 *bios_addr) 558{ 559 int i; 560 u8 *flags; 561 u8 *heads; 562 563 /* Get E2Prom configuration */ 564 initio_read_eeprom(host->addr); 565 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8) 566 host->max_tar = 8; 567 else 568 host->max_tar = 16; 569 570 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1; 571 572 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID; 573 host->idmask = ~(1 << host->scsi_id); 574 575#ifdef CHK_PARITY 576 /* Enable parity error response */ 577 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD); 578#endif 579 580 /* Mask all the interrupt */ 581 outb(0x1F, host->addr + TUL_Mask); 582 583 initio_stop_bm(host); 584 /* --- Initialize the tulip --- */ 585 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0); 586 587 /* program HBA's SCSI ID */ 588 outb(host->scsi_id << 4, host->addr + TUL_SScsiId); 589 590 /* Enable Initiator Mode ,phase latch,alternate sync period mode, 591 disable SCSI reset */ 592 if (host->config & HCC_EN_PAR) 593 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR); 594 else 595 host->sconf1 = (TSC_INITDEFAULT); 596 outb(host->sconf1, host->addr + TUL_SConfig); 597 598 /* Enable HW reselect */ 599 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); 600 601 outb(0, host->addr + TUL_SPeriod); 602 603 /* selection time out = 250 ms */ 604 outb(153, host->addr + TUL_STimeOut); 605 606 /* Enable SCSI terminator */ 607 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)), 608 host->addr + TUL_XCtrl); 609 outb(((host->config & HCC_AUTO_TERM) >> 4) | 610 (inb(host->addr + TUL_GCTRL1) & 0xFE), 611 host->addr + TUL_GCTRL1); 612 613 for (i = 0, 614 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config), 615 heads = bios_addr + 0x180; 616 i < host->max_tar; 617 i++, flags++) { 618 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE); 619 if (host->targets[i].flags & TCF_EN_255) 620 host->targets[i].drv_flags = TCF_DRV_255_63; 621 else 622 host->targets[i].drv_flags = 0; 623 host->targets[i].js_period = 0; 624 host->targets[i].sconfig0 = host->sconf1; 625 host->targets[i].heads = *heads++; 626 if (host->targets[i].heads == 255) 627 host->targets[i].drv_flags = TCF_DRV_255_63; 628 else 629 host->targets[i].drv_flags = 0; 630 host->targets[i].sectors = *heads++; 631 host->targets[i].flags &= ~TCF_BUSY; 632 host->act_tags[i] = 0; 633 host->max_tags[i] = 0xFF; 634 } /* for */ 635 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n", 636 host->addr, host->pci_dev->irq, 637 host->bios_addr, host->scsi_id); 638 /* Reset SCSI Bus */ 639 if (host->config & HCC_SCSI_RESET) { 640 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n"); 641 initio_reset_scsi(host, 10); 642 } 643 outb(0x17, host->addr + TUL_SCFG1); 644 outb(0xE9, host->addr + TUL_SIntEnable); 645} 646 647/** 648 * initio_alloc_scb - Allocate an SCB 649 * @host: InitIO host we are allocating for 650 * 651 * Walk the SCB list for the controller and allocate a free SCB if 652 * one exists. 653 */ 654static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host) 655{ 656 struct scsi_ctrl_blk *scb; 657 unsigned long flags; 658 659 spin_lock_irqsave(&host->avail_lock, flags); 660 if ((scb = host->first_avail) != NULL) { 661#if DEBUG_QUEUE 662 printk("find scb at %p\n", scb); 663#endif 664 if ((host->first_avail = scb->next) == NULL) 665 host->last_avail = NULL; 666 scb->next = NULL; 667 scb->status = SCB_RENT; 668 } 669 spin_unlock_irqrestore(&host->avail_lock, flags); 670 return scb; 671} 672 673/** 674 * initio_release_scb - Release an SCB 675 * @host: InitIO host that owns the SCB 676 * @cmnd: SCB command block being returned 677 * 678 * Return an allocated SCB to the host free list 679 */ 680 681static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd) 682{ 683 unsigned long flags; 684 685#if DEBUG_QUEUE 686 printk("Release SCB %p; ", cmnd); 687#endif 688 spin_lock_irqsave(&(host->avail_lock), flags); 689 cmnd->srb = NULL; 690 cmnd->status = 0; 691 cmnd->next = NULL; 692 if (host->last_avail != NULL) { 693 host->last_avail->next = cmnd; 694 host->last_avail = cmnd; 695 } else { 696 host->first_avail = cmnd; 697 host->last_avail = cmnd; 698 } 699 spin_unlock_irqrestore(&(host->avail_lock), flags); 700} 701 702/***************************************************************************/ 703static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) 704{ 705 706#if DEBUG_QUEUE 707 printk("Append pend SCB %p; ", scbp); 708#endif 709 scbp->status = SCB_PEND; 710 scbp->next = NULL; 711 if (host->last_pending != NULL) { 712 host->last_pending->next = scbp; 713 host->last_pending = scbp; 714 } else { 715 host->first_pending = scbp; 716 host->last_pending = scbp; 717 } 718} 719 720/***************************************************************************/ 721static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) 722{ 723 724#if DEBUG_QUEUE 725 printk("Push pend SCB %p; ", scbp); 726#endif 727 scbp->status = SCB_PEND; 728 if ((scbp->next = host->first_pending) != NULL) { 729 host->first_pending = scbp; 730 } else { 731 host->first_pending = scbp; 732 host->last_pending = scbp; 733 } 734} 735 736static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host) 737{ 738 struct scsi_ctrl_blk *first; 739 740 741 first = host->first_pending; 742 while (first != NULL) { 743 if (first->opcode != ExecSCSI) 744 return first; 745 if (first->tagmsg == 0) { 746 if ((host->act_tags[first->target] == 0) && 747 !(host->targets[first->target].flags & TCF_BUSY)) 748 return first; 749 } else { 750 if ((host->act_tags[first->target] >= 751 host->max_tags[first->target]) | 752 (host->targets[first->target].flags & TCF_BUSY)) { 753 first = first->next; 754 continue; 755 } 756 return first; 757 } 758 first = first->next; 759 } 760 return first; 761} 762 763static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) 764{ 765 struct scsi_ctrl_blk *tmp, *prev; 766 767#if DEBUG_QUEUE 768 printk("unlink pend SCB %p; ", scb); 769#endif 770 771 prev = tmp = host->first_pending; 772 while (tmp != NULL) { 773 if (scb == tmp) { /* Unlink this SCB */ 774 if (tmp == host->first_pending) { 775 if ((host->first_pending = tmp->next) == NULL) 776 host->last_pending = NULL; 777 } else { 778 prev->next = tmp->next; 779 if (tmp == host->last_pending) 780 host->last_pending = prev; 781 } 782 tmp->next = NULL; 783 break; 784 } 785 prev = tmp; 786 tmp = tmp->next; 787 } 788} 789 790static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) 791{ 792 793#if DEBUG_QUEUE 794 printk("append busy SCB %p; ", scbp); 795#endif 796 if (scbp->tagmsg) 797 host->act_tags[scbp->target]++; 798 else 799 host->targets[scbp->target].flags |= TCF_BUSY; 800 scbp->status = SCB_BUSY; 801 scbp->next = NULL; 802 if (host->last_busy != NULL) { 803 host->last_busy->next = scbp; 804 host->last_busy = scbp; 805 } else { 806 host->first_busy = scbp; 807 host->last_busy = scbp; 808 } 809} 810 811/***************************************************************************/ 812static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host) 813{ 814 struct scsi_ctrl_blk *tmp; 815 816 817 if ((tmp = host->first_busy) != NULL) { 818 if ((host->first_busy = tmp->next) == NULL) 819 host->last_busy = NULL; 820 tmp->next = NULL; 821 if (tmp->tagmsg) 822 host->act_tags[tmp->target]--; 823 else 824 host->targets[tmp->target].flags &= ~TCF_BUSY; 825 } 826#if DEBUG_QUEUE 827 printk("Pop busy SCB %p; ", tmp); 828#endif 829 return tmp; 830} 831 832/***************************************************************************/ 833static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) 834{ 835 struct scsi_ctrl_blk *tmp, *prev; 836 837#if DEBUG_QUEUE 838 printk("unlink busy SCB %p; ", scb); 839#endif 840 841 prev = tmp = host->first_busy; 842 while (tmp != NULL) { 843 if (scb == tmp) { /* Unlink this SCB */ 844 if (tmp == host->first_busy) { 845 if ((host->first_busy = tmp->next) == NULL) 846 host->last_busy = NULL; 847 } else { 848 prev->next = tmp->next; 849 if (tmp == host->last_busy) 850 host->last_busy = prev; 851 } 852 tmp->next = NULL; 853 if (tmp->tagmsg) 854 host->act_tags[tmp->target]--; 855 else 856 host->targets[tmp->target].flags &= ~TCF_BUSY; 857 break; 858 } 859 prev = tmp; 860 tmp = tmp->next; 861 } 862 return; 863} 864 865struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun) 866{ 867 struct scsi_ctrl_blk *tmp; 868 u16 scbp_tarlun; 869 870 871 tmp = host->first_busy; 872 while (tmp != NULL) { 873 scbp_tarlun = (tmp->lun << 8) | (tmp->target); 874 if (scbp_tarlun == tarlun) { /* Unlink this SCB */ 875 break; 876 } 877 tmp = tmp->next; 878 } 879#if DEBUG_QUEUE 880 printk("find busy SCB %p; ", tmp); 881#endif 882 return tmp; 883} 884 885static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp) 886{ 887#if DEBUG_QUEUE 888 printk("append done SCB %p; ", scbp); 889#endif 890 891 scbp->status = SCB_DONE; 892 scbp->next = NULL; 893 if (host->last_done != NULL) { 894 host->last_done->next = scbp; 895 host->last_done = scbp; 896 } else { 897 host->first_done = scbp; 898 host->last_done = scbp; 899 } 900} 901 902struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host) 903{ 904 struct scsi_ctrl_blk *tmp; 905 906 if ((tmp = host->first_done) != NULL) { 907 if ((host->first_done = tmp->next) == NULL) 908 host->last_done = NULL; 909 tmp->next = NULL; 910 } 911#if DEBUG_QUEUE 912 printk("find done SCB %p; ",tmp); 913#endif 914 return tmp; 915} 916 917static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp) 918{ 919 unsigned long flags; 920 struct scsi_ctrl_blk *tmp, *prev; 921 922 spin_lock_irqsave(&host->semaph_lock, flags); 923 924 if ((host->semaph == 0) && (host->active == NULL)) { 925 /* disable Jasmin SCSI Int */ 926 outb(0x1F, host->addr + TUL_Mask); 927 spin_unlock_irqrestore(&host->semaph_lock, flags); 928 /* FIXME: synchronize_irq needed ? */ 929 tulip_main(host); 930 spin_lock_irqsave(&host->semaph_lock, flags); 931 host->semaph = 1; 932 outb(0x0F, host->addr + TUL_Mask); 933 spin_unlock_irqrestore(&host->semaph_lock, flags); 934 return SCSI_ABORT_SNOOZE; 935 } 936 prev = tmp = host->first_pending; /* Check Pend queue */ 937 while (tmp != NULL) { 938 /* 07/27/98 */ 939 if (tmp->srb == srbp) { 940 if (tmp == host->active) { 941 spin_unlock_irqrestore(&host->semaph_lock, flags); 942 return SCSI_ABORT_BUSY; 943 } else if (tmp == host->first_pending) { 944 if ((host->first_pending = tmp->next) == NULL) 945 host->last_pending = NULL; 946 } else { 947 prev->next = tmp->next; 948 if (tmp == host->last_pending) 949 host->last_pending = prev; 950 } 951 tmp->hastat = HOST_ABORTED; 952 tmp->flags |= SCF_DONE; 953 if (tmp->flags & SCF_POST) 954 (*tmp->post) ((u8 *) host, (u8 *) tmp); 955 spin_unlock_irqrestore(&host->semaph_lock, flags); 956 return SCSI_ABORT_SUCCESS; 957 } 958 prev = tmp; 959 tmp = tmp->next; 960 } 961 962 prev = tmp = host->first_busy; /* Check Busy queue */ 963 while (tmp != NULL) { 964 if (tmp->srb == srbp) { 965 if (tmp == host->active) { 966 spin_unlock_irqrestore(&host->semaph_lock, flags); 967 return SCSI_ABORT_BUSY; 968 } else if (tmp->tagmsg == 0) { 969 spin_unlock_irqrestore(&host->semaph_lock, flags); 970 return SCSI_ABORT_BUSY; 971 } else { 972 host->act_tags[tmp->target]--; 973 if (tmp == host->first_busy) { 974 if ((host->first_busy = tmp->next) == NULL) 975 host->last_busy = NULL; 976 } else { 977 prev->next = tmp->next; 978 if (tmp == host->last_busy) 979 host->last_busy = prev; 980 } 981 tmp->next = NULL; 982 983 984 tmp->hastat = HOST_ABORTED; 985 tmp->flags |= SCF_DONE; 986 if (tmp->flags & SCF_POST) 987 (*tmp->post) ((u8 *) host, (u8 *) tmp); 988 spin_unlock_irqrestore(&host->semaph_lock, flags); 989 return SCSI_ABORT_SUCCESS; 990 } 991 } 992 prev = tmp; 993 tmp = tmp->next; 994 } 995 spin_unlock_irqrestore(&host->semaph_lock, flags); 996 return SCSI_ABORT_NOT_RUNNING; 997} 998 999/***************************************************************************/ 1000static int initio_bad_seq(struct initio_host * host) 1001{ 1002 struct scsi_ctrl_blk *scb; 1003 1004 printk("initio_bad_seg c=%d\n", host->index); 1005 1006 if ((scb = host->active) != NULL) { 1007 initio_unlink_busy_scb(host, scb); 1008 scb->hastat = HOST_BAD_PHAS; 1009 scb->tastat = 0; 1010 initio_append_done_scb(host, scb); 1011 } 1012 initio_stop_bm(host); 1013 initio_reset_scsi(host, 8); /* 7/29/98 */ 1014 return initio_post_scsi_rst(host); 1015} 1016 1017 1018/************************************************************************/ 1019static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb) 1020{ 1021 unsigned long flags; 1022 1023 scb->mode = 0; 1024 1025 scb->sgidx = 0; 1026 scb->sgmax = scb->sglen; 1027 1028 spin_lock_irqsave(&host->semaph_lock, flags); 1029 1030 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */ 1031 1032/* VVVVV 07/21/98 */ 1033 if (host->semaph == 1) { 1034 /* Disable Jasmin SCSI Int */ 1035 outb(0x1F, host->addr + TUL_Mask); 1036 host->semaph = 0; 1037 spin_unlock_irqrestore(&host->semaph_lock, flags); 1038 1039 tulip_main(host); 1040 1041 spin_lock_irqsave(&host->semaph_lock, flags); 1042 host->semaph = 1; 1043 outb(0x0F, host->addr + TUL_Mask); 1044 } 1045 spin_unlock_irqrestore(&host->semaph_lock, flags); 1046 return; 1047} 1048 1049/***************************************************************************/ 1050static int initio_isr(struct initio_host * host) 1051{ 1052 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) { 1053 if (host->semaph == 1) { 1054 outb(0x1F, host->addr + TUL_Mask); 1055 /* Disable Tulip SCSI Int */ 1056 host->semaph = 0; 1057 1058 tulip_main(host); 1059 1060 host->semaph = 1; 1061 outb(0x0F, host->addr + TUL_Mask); 1062 return 1; 1063 } 1064 } 1065 return 0; 1066} 1067 1068static int tulip_main(struct initio_host * host) 1069{ 1070 struct scsi_ctrl_blk *scb; 1071 1072 for (;;) { 1073 tulip_scsi(host); /* Call tulip_scsi */ 1074 1075 /* Walk the list of completed SCBs */ 1076 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */ 1077 if (scb->tastat == INI_QUEUE_FULL) { 1078 host->max_tags[scb->target] = 1079 host->act_tags[scb->target] - 1; 1080 scb->tastat = 0; 1081 initio_append_pend_scb(host, scb); 1082 continue; 1083 } 1084 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */ 1085 if (scb->tastat == 2) { 1086 1087 /* clr sync. nego flag */ 1088 1089 if (scb->flags & SCF_SENSE) { 1090 u8 len; 1091 len = scb->senselen; 1092 if (len == 0) 1093 len = 1; 1094 scb->buflen = scb->senselen; 1095 scb->bufptr = scb->senseptr; 1096 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */ 1097 /* so, we won't report wrong direction in xfer_data_in, 1098 and won't report HOST_DO_DU in state_6 */ 1099 scb->mode = SCM_RSENS; 1100 scb->ident &= 0xBF; /* Disable Disconnect */ 1101 scb->tagmsg = 0; 1102 scb->tastat = 0; 1103 scb->cdblen = 6; 1104 scb->cdb[0] = SCSICMD_RequestSense; 1105 scb->cdb[1] = 0; 1106 scb->cdb[2] = 0; 1107 scb->cdb[3] = 0; 1108 scb->cdb[4] = len; 1109 scb->cdb[5] = 0; 1110 initio_push_pend_scb(host, scb); 1111 break; 1112 } 1113 } 1114 } else { /* in request sense mode */ 1115 1116 if (scb->tastat == 2) { /* check contition status again after sending 1117 requset sense cmd 0x3 */ 1118 scb->hastat = HOST_BAD_PHAS; 1119 } 1120 scb->tastat = 2; 1121 } 1122 scb->flags |= SCF_DONE; 1123 if (scb->flags & SCF_POST) { 1124 /* FIXME: only one post method and lose casts */ 1125 (*scb->post) ((u8 *) host, (u8 *) scb); 1126 } 1127 } /* while */ 1128 /* find_active: */ 1129 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING) 1130 continue; 1131 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */ 1132 return 1; /* return to OS, enable interrupt */ 1133 /* Check pending SCB */ 1134 if (initio_find_first_pend_scb(host) == NULL) 1135 return 1; /* return to OS, enable interrupt */ 1136 } /* End of for loop */ 1137 /* statement won't reach here */ 1138} 1139 1140static void tulip_scsi(struct initio_host * host) 1141{ 1142 struct scsi_ctrl_blk *scb; 1143 struct target_control *active_tc; 1144 1145 /* make sure to service interrupt asap */ 1146 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) { 1147 host->phase = host->jsstatus0 & TSS_PH_MASK; 1148 host->jsstatus1 = inb(host->addr + TUL_SStatus1); 1149 host->jsint = inb(host->addr + TUL_SInt); 1150 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */ 1151 int_initio_scsi_rst(host); 1152 return; 1153 } 1154 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */ 1155 if (int_initio_resel(host) == 0) 1156 initio_next_state(host); 1157 return; 1158 } 1159 if (host->jsint & TSS_SEL_TIMEOUT) { 1160 int_initio_busfree(host); 1161 return; 1162 } 1163 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */ 1164 int_initio_busfree(host); /* unexpected bus free or sel timeout */ 1165 return; 1166 } 1167 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */ 1168 if (host->active) 1169 initio_next_state(host); 1170 return; 1171 } 1172 } 1173 if (host->active != NULL) 1174 return; 1175 1176 if ((scb = initio_find_first_pend_scb(host)) == NULL) 1177 return; 1178 1179 /* program HBA's SCSI ID & target SCSI ID */ 1180 outb((host->scsi_id << 4) | (scb->target & 0x0F), 1181 host->addr + TUL_SScsiId); 1182 if (scb->opcode == ExecSCSI) { 1183 active_tc = &host->targets[scb->target]; 1184 1185 if (scb->tagmsg) 1186 active_tc->drv_flags |= TCF_DRV_EN_TAG; 1187 else 1188 active_tc->drv_flags &= ~TCF_DRV_EN_TAG; 1189 1190 outb(active_tc->js_period, host->addr + TUL_SPeriod); 1191 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */ 1192 initio_select_atn_stop(host, scb); 1193 } else { 1194 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */ 1195 initio_select_atn_stop(host, scb); 1196 } else { 1197 if (scb->tagmsg) 1198 initio_select_atn3(host, scb); 1199 else 1200 initio_select_atn(host, scb); 1201 } 1202 } 1203 if (scb->flags & SCF_POLL) { 1204 while (wait_tulip(host) != -1) { 1205 if (initio_next_state(host) == -1) 1206 break; 1207 } 1208 } 1209 } else if (scb->opcode == BusDevRst) { 1210 initio_select_atn_stop(host, scb); 1211 scb->next_state = 8; 1212 if (scb->flags & SCF_POLL) { 1213 while (wait_tulip(host) != -1) { 1214 if (initio_next_state(host) == -1) 1215 break; 1216 } 1217 } 1218 } else if (scb->opcode == AbortCmd) { 1219 if (initio_abort_srb(host, scb->srb) != 0) { 1220 initio_unlink_pend_scb(host, scb); 1221 initio_release_scb(host, scb); 1222 } else { 1223 scb->opcode = BusDevRst; 1224 initio_select_atn_stop(host, scb); 1225 scb->next_state = 8; 1226 } 1227 } else { 1228 initio_unlink_pend_scb(host, scb); 1229 scb->hastat = 0x16; /* bad command */ 1230 initio_append_done_scb(host, scb); 1231 } 1232 return; 1233} 1234 1235/** 1236 * initio_next_state - Next SCSI state 1237 * @host: InitIO host we are processing 1238 * 1239 * Progress the active command block along the state machine 1240 * until we hit a state which we must wait for activity to occur. 1241 * 1242 * Returns zero or a negative code. 1243 */ 1244 1245static int initio_next_state(struct initio_host * host) 1246{ 1247 int next; 1248 1249 next = host->active->next_state; 1250 for (;;) { 1251 switch (next) { 1252 case 1: 1253 next = initio_state_1(host); 1254 break; 1255 case 2: 1256 next = initio_state_2(host); 1257 break; 1258 case 3: 1259 next = initio_state_3(host); 1260 break; 1261 case 4: 1262 next = initio_state_4(host); 1263 break; 1264 case 5: 1265 next = initio_state_5(host); 1266 break; 1267 case 6: 1268 next = initio_state_6(host); 1269 break; 1270 case 7: 1271 next = initio_state_7(host); 1272 break; 1273 case 8: 1274 return initio_bus_device_reset(host); 1275 default: 1276 return initio_bad_seq(host); 1277 } 1278 if (next <= 0) 1279 return next; 1280 } 1281} 1282 1283 1284/** 1285 * initio_state_1 - SCSI state machine 1286 * @host: InitIO host we are controlling 1287 * 1288 * Perform SCSI state processing for Select/Attention/Stop 1289 */ 1290 1291static int initio_state_1(struct initio_host * host) 1292{ 1293 struct scsi_ctrl_blk *scb = host->active; 1294 struct target_control *active_tc = host->active_tc; 1295#if DEBUG_STATE 1296 printk("-s1-"); 1297#endif 1298 1299 /* Move the SCB from pending to busy */ 1300 initio_unlink_pend_scb(host, scb); 1301 initio_append_busy_scb(host, scb); 1302 1303 outb(active_tc->sconfig0, host->addr + TUL_SConfig ); 1304 /* ATN on */ 1305 if (host->phase == MSG_OUT) { 1306 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1); 1307 outb(scb->ident, host->addr + TUL_SFifo); 1308 1309 if (scb->tagmsg) { 1310 outb(scb->tagmsg, host->addr + TUL_SFifo); 1311 outb(scb->tagid, host->addr + TUL_SFifo); 1312 } 1313 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { 1314 active_tc->flags |= TCF_WDTR_DONE; 1315 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo); 1316 outb(2, host->addr + TUL_SFifo); /* Extended msg length */ 1317 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* Sync request */ 1318 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */ 1319 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { 1320 active_tc->flags |= TCF_SYNC_DONE; 1321 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo); 1322 outb(3, host->addr + TUL_SFifo); /* extended msg length */ 1323 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */ 1324 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo); 1325 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */ 1326 } 1327 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1328 if (wait_tulip(host) == -1) 1329 return -1; 1330 } 1331 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1332 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal); 1333 /* Into before CDB xfer */ 1334 return 3; 1335} 1336 1337 1338/** 1339 * initio_state_2 - SCSI state machine 1340 * @host: InitIO host we are controlling 1341 * 1342 * state after selection with attention 1343 * state after selection with attention3 1344 */ 1345 1346static int initio_state_2(struct initio_host * host) 1347{ 1348 struct scsi_ctrl_blk *scb = host->active; 1349 struct target_control *active_tc = host->active_tc; 1350#if DEBUG_STATE 1351 printk("-s2-"); 1352#endif 1353 1354 initio_unlink_pend_scb(host, scb); 1355 initio_append_busy_scb(host, scb); 1356 1357 outb(active_tc->sconfig0, host->addr + TUL_SConfig); 1358 1359 if (host->jsstatus1 & TSS_CMD_PH_CMP) 1360 return 4; 1361 1362 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1363 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal); 1364 /* Into before CDB xfer */ 1365 return 3; 1366} 1367 1368/** 1369 * initio_state_3 - SCSI state machine 1370 * @host: InitIO host we are controlling 1371 * 1372 * state before CDB xfer is done 1373 */ 1374 1375static int initio_state_3(struct initio_host * host) 1376{ 1377 struct scsi_ctrl_blk *scb = host->active; 1378 struct target_control *active_tc = host->active_tc; 1379 int i; 1380 1381#if DEBUG_STATE 1382 printk("-s3-"); 1383#endif 1384 for (;;) { 1385 switch (host->phase) { 1386 case CMD_OUT: /* Command out phase */ 1387 for (i = 0; i < (int) scb->cdblen; i++) 1388 outb(scb->cdb[i], host->addr + TUL_SFifo); 1389 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1390 if (wait_tulip(host) == -1) 1391 return -1; 1392 if (host->phase == CMD_OUT) 1393 return initio_bad_seq(host); 1394 return 4; 1395 1396 case MSG_IN: /* Message in phase */ 1397 scb->next_state = 3; 1398 if (initio_msgin(host) == -1) 1399 return -1; 1400 break; 1401 1402 case STATUS_IN: /* Status phase */ 1403 if (initio_status_msg(host) == -1) 1404 return -1; 1405 break; 1406 1407 case MSG_OUT: /* Message out phase */ 1408 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) { 1409 outb(NOP, host->addr + TUL_SFifo); /* msg nop */ 1410 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1411 if (wait_tulip(host) == -1) 1412 return -1; 1413 } else { 1414 active_tc->flags |= TCF_SYNC_DONE; 1415 1416 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo); 1417 outb(3, host->addr + TUL_SFifo); /* ext. msg len */ 1418 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); /* sync request */ 1419 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo); 1420 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */ 1421 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1422 if (wait_tulip(host) == -1) 1423 return -1; 1424 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1425 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal); 1426 1427 } 1428 break; 1429 default: 1430 return initio_bad_seq(host); 1431 } 1432 } 1433} 1434 1435/** 1436 * initio_state_4 - SCSI state machine 1437 * @host: InitIO host we are controlling 1438 * 1439 * SCSI state machine. State 4 1440 */ 1441 1442static int initio_state_4(struct initio_host * host) 1443{ 1444 struct scsi_ctrl_blk *scb = host->active; 1445 1446#if DEBUG_STATE 1447 printk("-s4-"); 1448#endif 1449 if ((scb->flags & SCF_DIR) == SCF_NO_XF) { 1450 return 6; /* Go to state 6 (After data) */ 1451 } 1452 for (;;) { 1453 if (scb->buflen == 0) 1454 return 6; 1455 1456 switch (host->phase) { 1457 1458 case STATUS_IN: /* Status phase */ 1459 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */ 1460 scb->hastat = HOST_DO_DU; 1461 if ((initio_status_msg(host)) == -1) 1462 return -1; 1463 break; 1464 1465 case MSG_IN: /* Message in phase */ 1466 scb->next_state = 0x4; 1467 if (initio_msgin(host) == -1) 1468 return -1; 1469 break; 1470 1471 case MSG_OUT: /* Message out phase */ 1472 if (host->jsstatus0 & TSS_PAR_ERROR) { 1473 scb->buflen = 0; 1474 scb->hastat = HOST_DO_DU; 1475 if (initio_msgout_ide(host) == -1) 1476 return -1; 1477 return 6; 1478 } else { 1479 outb(NOP, host->addr + TUL_SFifo); /* msg nop */ 1480 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1481 if (wait_tulip(host) == -1) 1482 return -1; 1483 } 1484 break; 1485 1486 case DATA_IN: /* Data in phase */ 1487 return initio_xfer_data_in(host); 1488 1489 case DATA_OUT: /* Data out phase */ 1490 return initio_xfer_data_out(host); 1491 1492 default: 1493 return initio_bad_seq(host); 1494 } 1495 } 1496} 1497 1498 1499/** 1500 * initio_state_5 - SCSI state machine 1501 * @host: InitIO host we are controlling 1502 * 1503 * State after dma xfer done or phase change before xfer done 1504 */ 1505 1506static int initio_state_5(struct initio_host * host) 1507{ 1508 struct scsi_ctrl_blk *scb = host->active; 1509 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */ 1510 1511#if DEBUG_STATE 1512 printk("-s5-"); 1513#endif 1514 /*------ get remaining count -------*/ 1515 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF; 1516 1517 if (inb(host->addr + TUL_XCmd) & 0x20) { 1518 /* ----------------------- DATA_IN ----------------------------- */ 1519 /* check scsi parity error */ 1520 if (host->jsstatus0 & TSS_PAR_ERROR) 1521 scb->hastat = HOST_DO_DU; 1522 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */ 1523 /* tell Hardware scsi xfer has been terminated */ 1524 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl); 1525 /* wait until DMA xfer not pending */ 1526 while (inb(host->addr + TUL_XStatus) & XPEND) 1527 cpu_relax(); 1528 } 1529 } else { 1530 /*-------- DATA OUT -----------*/ 1531 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) { 1532 if (host->active_tc->js_period & TSC_WIDE_SCSI) 1533 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1; 1534 else 1535 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F); 1536 } 1537 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */ 1538 outb(TAX_X_ABT, host->addr + TUL_XCmd); 1539 /* wait Abort DMA xfer done */ 1540 while ((inb(host->addr + TUL_Int) & XABT) == 0) 1541 cpu_relax(); 1542 } 1543 if ((cnt == 1) && (host->phase == DATA_OUT)) { 1544 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1545 if (wait_tulip(host) == -1) 1546 return -1; 1547 cnt = 0; 1548 } else { 1549 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) 1550 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1551 } 1552 } 1553 if (cnt == 0) { 1554 scb->buflen = 0; 1555 return 6; /* After Data */ 1556 } 1557 /* Update active data pointer */ 1558 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */ 1559 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */ 1560 if (scb->flags & SCF_SG) { 1561 struct sg_entry *sgp; 1562 unsigned long i; 1563 1564 sgp = &scb->sglist[scb->sgidx]; 1565 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) { 1566 xcnt -= (long) sgp->len; 1567 if (xcnt < 0) { /* this sgp xfer half done */ 1568 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */ 1569 sgp->data += (u32) xcnt; /* new ptr to be xfer */ 1570 sgp->len -= (u32) xcnt; /* new len to be xfer */ 1571 scb->bufptr += ((u32) (i - scb->sgidx) << 3); 1572 /* new SG table ptr */ 1573 scb->sglen = (u8) (scb->sgmax - i); 1574 /* new SG table len */ 1575 scb->sgidx = (u16) i; 1576 /* for next disc and come in this loop */ 1577 return 4; /* Go to state 4 */ 1578 } 1579 /* else (xcnt >= 0 , i.e. this sgp already xferred */ 1580 } /* for */ 1581 return 6; /* Go to state 6 */ 1582 } else { 1583 scb->bufptr += (u32) xcnt; 1584 } 1585 return 4; /* Go to state 4 */ 1586} 1587 1588/** 1589 * initio_state_6 - SCSI state machine 1590 * @host: InitIO host we are controlling 1591 * 1592 * State after Data phase 1593 */ 1594 1595static int initio_state_6(struct initio_host * host) 1596{ 1597 struct scsi_ctrl_blk *scb = host->active; 1598 1599#if DEBUG_STATE 1600 printk("-s6-"); 1601#endif 1602 for (;;) { 1603 switch (host->phase) { 1604 case STATUS_IN: /* Status phase */ 1605 if ((initio_status_msg(host)) == -1) 1606 return -1; 1607 break; 1608 1609 case MSG_IN: /* Message in phase */ 1610 scb->next_state = 6; 1611 if ((initio_msgin(host)) == -1) 1612 return -1; 1613 break; 1614 1615 case MSG_OUT: /* Message out phase */ 1616 outb(NOP, host->addr + TUL_SFifo); /* msg nop */ 1617 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1618 if (wait_tulip(host) == -1) 1619 return -1; 1620 break; 1621 1622 case DATA_IN: /* Data in phase */ 1623 return initio_xpad_in(host); 1624 1625 case DATA_OUT: /* Data out phase */ 1626 return initio_xpad_out(host); 1627 1628 default: 1629 return initio_bad_seq(host); 1630 } 1631 } 1632} 1633 1634/** 1635 * initio_state_7 - SCSI state machine 1636 * @host: InitIO host we are controlling 1637 * 1638 */ 1639 1640static int initio_state_7(struct initio_host * host) 1641{ 1642 int cnt, i; 1643 1644#if DEBUG_STATE 1645 printk("-s7-"); 1646#endif 1647 /* flush SCSI FIFO */ 1648 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F; 1649 if (cnt) { 1650 for (i = 0; i < cnt; i++) 1651 inb(host->addr + TUL_SFifo); 1652 } 1653 switch (host->phase) { 1654 case DATA_IN: /* Data in phase */ 1655 case DATA_OUT: /* Data out phase */ 1656 return initio_bad_seq(host); 1657 default: 1658 return 6; /* Go to state 6 */ 1659 } 1660} 1661 1662/** 1663 * initio_xfer_data_in - Commence data input 1664 * @host: InitIO host in use 1665 * 1666 * Commence a block of data transfer. The transfer itself will 1667 * be managed by the controller and we will get a completion (or 1668 * failure) interrupt. 1669 */ 1670static int initio_xfer_data_in(struct initio_host * host) 1671{ 1672 struct scsi_ctrl_blk *scb = host->active; 1673 1674 if ((scb->flags & SCF_DIR) == SCF_DOUT) 1675 return 6; /* wrong direction */ 1676 1677 outl(scb->buflen, host->addr + TUL_SCnt0); 1678 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */ 1679 1680 if (scb->flags & SCF_SG) { /* S/G xfer */ 1681 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH); 1682 outl(scb->bufptr, host->addr + TUL_XAddH); 1683 outb(TAX_SG_IN, host->addr + TUL_XCmd); 1684 } else { 1685 outl(scb->buflen, host->addr + TUL_XCntH); 1686 outl(scb->bufptr, host->addr + TUL_XAddH); 1687 outb(TAX_X_IN, host->addr + TUL_XCmd); 1688 } 1689 scb->next_state = 0x5; 1690 return 0; /* return to OS, wait xfer done , let jas_isr come in */ 1691} 1692 1693/** 1694 * initio_xfer_data_out - Commence data output 1695 * @host: InitIO host in use 1696 * 1697 * Commence a block of data transfer. The transfer itself will 1698 * be managed by the controller and we will get a completion (or 1699 * failure) interrupt. 1700 */ 1701 1702static int initio_xfer_data_out(struct initio_host * host) 1703{ 1704 struct scsi_ctrl_blk *scb = host->active; 1705 1706 if ((scb->flags & SCF_DIR) == SCF_DIN) 1707 return 6; /* wrong direction */ 1708 1709 outl(scb->buflen, host->addr + TUL_SCnt0); 1710 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd); 1711 1712 if (scb->flags & SCF_SG) { /* S/G xfer */ 1713 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH); 1714 outl(scb->bufptr, host->addr + TUL_XAddH); 1715 outb(TAX_SG_OUT, host->addr + TUL_XCmd); 1716 } else { 1717 outl(scb->buflen, host->addr + TUL_XCntH); 1718 outl(scb->bufptr, host->addr + TUL_XAddH); 1719 outb(TAX_X_OUT, host->addr + TUL_XCmd); 1720 } 1721 1722 scb->next_state = 0x5; 1723 return 0; /* return to OS, wait xfer done , let jas_isr come in */ 1724} 1725 1726int initio_xpad_in(struct initio_host * host) 1727{ 1728 struct scsi_ctrl_blk *scb = host->active; 1729 struct target_control *active_tc = host->active_tc; 1730 1731 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK) 1732 scb->hastat = HOST_DO_DU; /* over run */ 1733 for (;;) { 1734 if (active_tc->js_period & TSC_WIDE_SCSI) 1735 outl(2, host->addr + TUL_SCnt0); 1736 else 1737 outl(1, host->addr + TUL_SCnt0); 1738 1739 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 1740 if (wait_tulip(host) == -1) 1741 return -1; 1742 if (host->phase != DATA_IN) { 1743 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1744 return 6; 1745 } 1746 inb(host->addr + TUL_SFifo); 1747 } 1748} 1749 1750int initio_xpad_out(struct initio_host * host) 1751{ 1752 struct scsi_ctrl_blk *scb = host->active; 1753 struct target_control *active_tc = host->active_tc; 1754 1755 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK) 1756 scb->hastat = HOST_DO_DU; /* over run */ 1757 for (;;) { 1758 if (active_tc->js_period & TSC_WIDE_SCSI) 1759 outl(2, host->addr + TUL_SCnt0); 1760 else 1761 outl(1, host->addr + TUL_SCnt0); 1762 1763 outb(0, host->addr + TUL_SFifo); 1764 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1765 if ((wait_tulip(host)) == -1) 1766 return -1; 1767 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */ 1768 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); 1769 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1770 return 6; 1771 } 1772 } 1773} 1774 1775int initio_status_msg(struct initio_host * host) 1776{ /* status & MSG_IN */ 1777 struct scsi_ctrl_blk *scb = host->active; 1778 u8 msg; 1779 1780 outb(TSC_CMD_COMP, host->addr + TUL_SCmd); 1781 if (wait_tulip(host) == -1) 1782 return -1; 1783 1784 /* get status */ 1785 scb->tastat = inb(host->addr + TUL_SFifo); 1786 1787 if (host->phase == MSG_OUT) { 1788 if (host->jsstatus0 & TSS_PAR_ERROR) 1789 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo); 1790 else 1791 outb(NOP, host->addr + TUL_SFifo); 1792 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1793 return wait_tulip(host); 1794 } 1795 if (host->phase == MSG_IN) { 1796 msg = inb(host->addr + TUL_SFifo); 1797 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */ 1798 if ((initio_msgin_accept(host)) == -1) 1799 return -1; 1800 if (host->phase != MSG_OUT) 1801 return initio_bad_seq(host); 1802 outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo); 1803 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 1804 return wait_tulip(host); 1805 } 1806 if (msg == 0) { /* Command complete */ 1807 1808 if ((scb->tastat & 0x18) == 0x10) /* No link support */ 1809 return initio_bad_seq(host); 1810 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1811 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd); 1812 return initio_wait_done_disc(host); 1813 1814 } 1815 if (msg == LINKED_CMD_COMPLETE || 1816 msg == LINKED_FLG_CMD_COMPLETE) { 1817 if ((scb->tastat & 0x18) == 0x10) 1818 return initio_msgin_accept(host); 1819 } 1820 } 1821 return initio_bad_seq(host); 1822} 1823 1824 1825/* scsi bus free */ 1826int int_initio_busfree(struct initio_host * host) 1827{ 1828 struct scsi_ctrl_blk *scb = host->active; 1829 1830 if (scb != NULL) { 1831 if (scb->status & SCB_SELECT) { /* selection timeout */ 1832 initio_unlink_pend_scb(host, scb); 1833 scb->hastat = HOST_SEL_TOUT; 1834 initio_append_done_scb(host, scb); 1835 } else { /* Unexpected bus free */ 1836 initio_unlink_busy_scb(host, scb); 1837 scb->hastat = HOST_BUS_FREE; 1838 initio_append_done_scb(host, scb); 1839 } 1840 host->active = NULL; 1841 host->active_tc = NULL; 1842 } 1843 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */ 1844 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig); 1845 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */ 1846 return -1; 1847} 1848 1849 1850/** 1851 * int_initio_scsi_rst - SCSI reset occurred 1852 * @host: Host seeing the reset 1853 * 1854 * A SCSI bus reset has occurred. Clean up any pending transfer 1855 * the hardware is doing by DMA and then abort all active and 1856 * disconnected commands. The mid layer should sort the rest out 1857 * for us 1858 */ 1859 1860static int int_initio_scsi_rst(struct initio_host * host) 1861{ 1862 struct scsi_ctrl_blk *scb; 1863 int i; 1864 1865 /* if DMA xfer is pending, abort DMA xfer */ 1866 if (inb(host->addr + TUL_XStatus) & 0x01) { 1867 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd); 1868 /* wait Abort DMA xfer done */ 1869 while ((inb(host->addr + TUL_Int) & 0x04) == 0) 1870 cpu_relax(); 1871 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 1872 } 1873 /* Abort all active & disconnected scb */ 1874 while ((scb = initio_pop_busy_scb(host)) != NULL) { 1875 scb->hastat = HOST_BAD_PHAS; 1876 initio_append_done_scb(host, scb); 1877 } 1878 host->active = NULL; 1879 host->active_tc = NULL; 1880 1881 /* clr sync nego. done flag */ 1882 for (i = 0; i < host->max_tar; i++) 1883 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE); 1884 return -1; 1885} 1886 1887/** 1888 * int_initio_resel - Reselection occurred 1889 * @host: InitIO host adapter 1890 * 1891 * A SCSI reselection event has been signalled and the interrupt 1892 * is now being processed. Work out which command block needs attention 1893 * and continue processing that command. 1894 */ 1895 1896int int_initio_resel(struct initio_host * host) 1897{ 1898 struct scsi_ctrl_blk *scb; 1899 struct target_control *active_tc; 1900 u8 tag, msg = 0; 1901 u8 tar, lun; 1902 1903 if ((scb = host->active) != NULL) { 1904 /* FIXME: Why check and not just clear ? */ 1905 if (scb->status & SCB_SELECT) /* if waiting for selection complete */ 1906 scb->status &= ~SCB_SELECT; 1907 host->active = NULL; 1908 } 1909 /* --------- get target id---------------------- */ 1910 tar = inb(host->addr + TUL_SBusId); 1911 /* ------ get LUN from Identify message----------- */ 1912 lun = inb(host->addr + TUL_SIdent) & 0x0F; 1913 /* 07/22/98 from 0x1F -> 0x0F */ 1914 active_tc = &host->targets[tar]; 1915 host->active_tc = active_tc; 1916 outb(active_tc->sconfig0, host->addr + TUL_SConfig); 1917 outb(active_tc->js_period, host->addr + TUL_SPeriod); 1918 1919 /* ------------- tag queueing ? ------------------- */ 1920 if (active_tc->drv_flags & TCF_DRV_EN_TAG) { 1921 if ((initio_msgin_accept(host)) == -1) 1922 return -1; 1923 if (host->phase != MSG_IN) 1924 goto no_tag; 1925 outl(1, host->addr + TUL_SCnt0); 1926 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 1927 if (wait_tulip(host) == -1) 1928 return -1; 1929 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */ 1930 1931 if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG) 1932 /* Is simple Tag */ 1933 goto no_tag; 1934 1935 if (initio_msgin_accept(host) == -1) 1936 return -1; 1937 1938 if (host->phase != MSG_IN) 1939 goto no_tag; 1940 1941 outl(1, host->addr + TUL_SCnt0); 1942 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 1943 if (wait_tulip(host) == -1) 1944 return -1; 1945 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */ 1946 scb = host->scb + tag; 1947 if (scb->target != tar || scb->lun != lun) { 1948 return initio_msgout_abort_tag(host); 1949 } 1950 if (scb->status != SCB_BUSY) { /* 03/24/95 */ 1951 return initio_msgout_abort_tag(host); 1952 } 1953 host->active = scb; 1954 if ((initio_msgin_accept(host)) == -1) 1955 return -1; 1956 } else { /* No tag */ 1957 no_tag: 1958 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) { 1959 return initio_msgout_abort_targ(host); 1960 } 1961 host->active = scb; 1962 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) { 1963 if ((initio_msgin_accept(host)) == -1) 1964 return -1; 1965 } 1966 } 1967 return 0; 1968} 1969 1970/** 1971 * int_initio_bad_seq - out of phase 1972 * @host: InitIO host flagging event 1973 * 1974 * We have ended up out of phase somehow. Reset the host controller 1975 * and throw all our toys out of the pram. Let the midlayer clean up 1976 */ 1977 1978static int int_initio_bad_seq(struct initio_host * host) 1979{ /* target wrong phase */ 1980 struct scsi_ctrl_blk *scb; 1981 int i; 1982 1983 initio_reset_scsi(host, 10); 1984 1985 while ((scb = initio_pop_busy_scb(host)) != NULL) { 1986 scb->hastat = HOST_BAD_PHAS; 1987 initio_append_done_scb(host, scb); 1988 } 1989 for (i = 0; i < host->max_tar; i++) 1990 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE); 1991 return -1; 1992} 1993 1994 1995/** 1996 * initio_msgout_abort_targ - abort a tag 1997 * @host: InitIO host 1998 * 1999 * Abort when the target/lun does not match or when our SCB is not 2000 * busy. Used by untagged commands. 2001 */ 2002 2003static int initio_msgout_abort_targ(struct initio_host * host) 2004{ 2005 2006 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal); 2007 if (initio_msgin_accept(host) == -1) 2008 return -1; 2009 if (host->phase != MSG_OUT) 2010 return initio_bad_seq(host); 2011 2012 outb(ABORT_TASK_SET, host->addr + TUL_SFifo); 2013 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2014 2015 return initio_wait_disc(host); 2016} 2017 2018/** 2019 * initio_msgout_abort_tag - abort a tag 2020 * @host: InitIO host 2021 * 2022 * Abort when the target/lun does not match or when our SCB is not 2023 * busy. Used for tagged commands. 2024 */ 2025 2026static int initio_msgout_abort_tag(struct initio_host * host) 2027{ 2028 2029 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal); 2030 if (initio_msgin_accept(host) == -1) 2031 return -1; 2032 if (host->phase != MSG_OUT) 2033 return initio_bad_seq(host); 2034 2035 outb(ABORT_TASK, host->addr + TUL_SFifo); 2036 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2037 2038 return initio_wait_disc(host); 2039 2040} 2041 2042/** 2043 * initio_msgin - Message in 2044 * @host: InitIO Host 2045 * 2046 * Process incoming message 2047 */ 2048static int initio_msgin(struct initio_host * host) 2049{ 2050 struct target_control *active_tc; 2051 2052 for (;;) { 2053 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 2054 2055 outl(1, host->addr + TUL_SCnt0); 2056 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 2057 if (wait_tulip(host) == -1) 2058 return -1; 2059 2060 switch (inb(host->addr + TUL_SFifo)) { 2061 case DISCONNECT: /* Disconnect msg */ 2062 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd); 2063 return initio_wait_disc(host); 2064 case SAVE_POINTERS: 2065 case RESTORE_POINTERS: 2066 case NOP: 2067 initio_msgin_accept(host); 2068 break; 2069 case MESSAGE_REJECT: /* Clear ATN first */ 2070 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), 2071 host->addr + TUL_SSignal); 2072 active_tc = host->active_tc; 2073 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */ 2074 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), 2075 host->addr + TUL_SSignal); 2076 initio_msgin_accept(host); 2077 break; 2078 case EXTENDED_MESSAGE: /* extended msg */ 2079 initio_msgin_extend(host); 2080 break; 2081 case IGNORE_WIDE_RESIDUE: 2082 initio_msgin_accept(host); 2083 break; 2084 case COMMAND_COMPLETE: 2085 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 2086 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd); 2087 return initio_wait_done_disc(host); 2088 default: 2089 initio_msgout_reject(host); 2090 break; 2091 } 2092 if (host->phase != MSG_IN) 2093 return host->phase; 2094 } 2095 /* statement won't reach here */ 2096} 2097 2098static int initio_msgout_reject(struct initio_host * host) 2099{ 2100 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal); 2101 2102 if (initio_msgin_accept(host) == -1) 2103 return -1; 2104 2105 if (host->phase == MSG_OUT) { 2106 outb(MESSAGE_REJECT, host->addr + TUL_SFifo); /* Msg reject */ 2107 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2108 return wait_tulip(host); 2109 } 2110 return host->phase; 2111} 2112 2113static int initio_msgout_ide(struct initio_host * host) 2114{ 2115 outb(INITIATOR_ERROR, host->addr + TUL_SFifo); /* Initiator Detected Error */ 2116 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2117 return wait_tulip(host); 2118} 2119 2120static int initio_msgin_extend(struct initio_host * host) 2121{ 2122 u8 len, idx; 2123 2124 if (initio_msgin_accept(host) != MSG_IN) 2125 return host->phase; 2126 2127 /* Get extended msg length */ 2128 outl(1, host->addr + TUL_SCnt0); 2129 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 2130 if (wait_tulip(host) == -1) 2131 return -1; 2132 2133 len = inb(host->addr + TUL_SFifo); 2134 host->msg[0] = len; 2135 for (idx = 1; len != 0; len--) { 2136 2137 if ((initio_msgin_accept(host)) != MSG_IN) 2138 return host->phase; 2139 outl(1, host->addr + TUL_SCnt0); 2140 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd); 2141 if (wait_tulip(host) == -1) 2142 return -1; 2143 host->msg[idx++] = inb(host->addr + TUL_SFifo); 2144 } 2145 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */ 2146 u8 r; 2147 if (host->msg[0] != 3) /* if length is not right */ 2148 return initio_msgout_reject(host); 2149 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */ 2150 host->msg[3] = 0; 2151 } else { 2152 if (initio_msgin_sync(host) == 0 && 2153 (host->active_tc->flags & TCF_SYNC_DONE)) { 2154 initio_sync_done(host); 2155 return initio_msgin_accept(host); 2156 } 2157 } 2158 2159 r = inb(host->addr + TUL_SSignal); 2160 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN, 2161 host->addr + TUL_SSignal); 2162 if (initio_msgin_accept(host) != MSG_OUT) 2163 return host->phase; 2164 /* sync msg out */ 2165 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); 2166 2167 initio_sync_done(host); 2168 2169 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo); 2170 outb(3, host->addr + TUL_SFifo); 2171 outb(EXTENDED_SDTR, host->addr + TUL_SFifo); 2172 outb(host->msg[2], host->addr + TUL_SFifo); 2173 outb(host->msg[3], host->addr + TUL_SFifo); 2174 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2175 return wait_tulip(host); 2176 } 2177 if (host->msg[0] != 2 || host->msg[1] != 3) 2178 return initio_msgout_reject(host); 2179 /* if it's WIDE DATA XFER REQ */ 2180 if (host->active_tc->flags & TCF_NO_WDTR) { 2181 host->msg[2] = 0; 2182 } else { 2183 if (host->msg[2] > 2) /* > 32 bits */ 2184 return initio_msgout_reject(host); 2185 if (host->msg[2] == 2) { /* == 32 */ 2186 host->msg[2] = 1; 2187 } else { 2188 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) { 2189 wdtr_done(host); 2190 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) 2191 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal); 2192 return initio_msgin_accept(host); 2193 } 2194 } 2195 } 2196 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal); 2197 2198 if (initio_msgin_accept(host) != MSG_OUT) 2199 return host->phase; 2200 /* WDTR msg out */ 2201 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo); 2202 outb(2, host->addr + TUL_SFifo); 2203 outb(EXTENDED_WDTR, host->addr + TUL_SFifo); 2204 outb(host->msg[2], host->addr + TUL_SFifo); 2205 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2206 return wait_tulip(host); 2207} 2208 2209static int initio_msgin_sync(struct initio_host * host) 2210{ 2211 char default_period; 2212 2213 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE]; 2214 if (host->msg[3] > MAX_OFFSET) { 2215 host->msg[3] = MAX_OFFSET; 2216 if (host->msg[2] < default_period) { 2217 host->msg[2] = default_period; 2218 return 1; 2219 } 2220 if (host->msg[2] >= 59) /* Change to async */ 2221 host->msg[3] = 0; 2222 return 1; 2223 } 2224 /* offset requests asynchronous transfers ? */ 2225 if (host->msg[3] == 0) { 2226 return 0; 2227 } 2228 if (host->msg[2] < default_period) { 2229 host->msg[2] = default_period; 2230 return 1; 2231 } 2232 if (host->msg[2] >= 59) { 2233 host->msg[3] = 0; 2234 return 1; 2235 } 2236 return 0; 2237} 2238 2239static int wdtr_done(struct initio_host * host) 2240{ 2241 host->active_tc->flags &= ~TCF_SYNC_DONE; 2242 host->active_tc->flags |= TCF_WDTR_DONE; 2243 2244 host->active_tc->js_period = 0; 2245 if (host->msg[2]) /* if 16 bit */ 2246 host->active_tc->js_period |= TSC_WIDE_SCSI; 2247 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD; 2248 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig); 2249 outb(host->active_tc->js_period, host->addr + TUL_SPeriod); 2250 2251 return 1; 2252} 2253 2254static int initio_sync_done(struct initio_host * host) 2255{ 2256 int i; 2257 2258 host->active_tc->flags |= TCF_SYNC_DONE; 2259 2260 if (host->msg[3]) { 2261 host->active_tc->js_period |= host->msg[3]; 2262 for (i = 0; i < 8; i++) { 2263 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */ 2264 break; 2265 } 2266 host->active_tc->js_period |= (i << 4); 2267 host->active_tc->sconfig0 |= TSC_ALT_PERIOD; 2268 } 2269 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig); 2270 outb(host->active_tc->js_period, host->addr + TUL_SPeriod); 2271 2272 return -1; 2273} 2274 2275 2276static int initio_post_scsi_rst(struct initio_host * host) 2277{ 2278 struct scsi_ctrl_blk *scb; 2279 struct target_control *active_tc; 2280 int i; 2281 2282 host->active = NULL; 2283 host->active_tc = NULL; 2284 host->flags = 0; 2285 2286 while ((scb = initio_pop_busy_scb(host)) != NULL) { 2287 scb->hastat = HOST_BAD_PHAS; 2288 initio_append_done_scb(host, scb); 2289 } 2290 /* clear sync done flag */ 2291 active_tc = &host->targets[0]; 2292 for (i = 0; i < host->max_tar; active_tc++, i++) { 2293 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE); 2294 /* Initialize the sync. xfer register values to an asyn xfer */ 2295 active_tc->js_period = 0; 2296 active_tc->sconfig0 = host->sconf1; 2297 host->act_tags[0] = 0; /* 07/22/98 */ 2298 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */ 2299 } /* for */ 2300 2301 return -1; 2302} 2303 2304static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb) 2305{ 2306 scb->status |= SCB_SELECT; 2307 scb->next_state = 0x1; 2308 host->active = scb; 2309 host->active_tc = &host->targets[scb->target]; 2310 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd); 2311} 2312 2313 2314static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb) 2315{ 2316 int i; 2317 2318 scb->status |= SCB_SELECT; 2319 scb->next_state = 0x2; 2320 2321 outb(scb->ident, host->addr + TUL_SFifo); 2322 for (i = 0; i < (int) scb->cdblen; i++) 2323 outb(scb->cdb[i], host->addr + TUL_SFifo); 2324 host->active_tc = &host->targets[scb->target]; 2325 host->active = scb; 2326 outb(TSC_SEL_ATN, host->addr + TUL_SCmd); 2327} 2328 2329static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb) 2330{ 2331 int i; 2332 2333 scb->status |= SCB_SELECT; 2334 scb->next_state = 0x2; 2335 2336 outb(scb->ident, host->addr + TUL_SFifo); 2337 outb(scb->tagmsg, host->addr + TUL_SFifo); 2338 outb(scb->tagid, host->addr + TUL_SFifo); 2339 for (i = 0; i < scb->cdblen; i++) 2340 outb(scb->cdb[i], host->addr + TUL_SFifo); 2341 host->active_tc = &host->targets[scb->target]; 2342 host->active = scb; 2343 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd); 2344} 2345 2346/** 2347 * initio_bus_device_reset - SCSI Bus Device Reset 2348 * @host: InitIO host to reset 2349 * 2350 * Perform a device reset and abort all pending SCBs for the 2351 * victim device 2352 */ 2353int initio_bus_device_reset(struct initio_host * host) 2354{ 2355 struct scsi_ctrl_blk *scb = host->active; 2356 struct target_control *active_tc = host->active_tc; 2357 struct scsi_ctrl_blk *tmp, *prev; 2358 u8 tar; 2359 2360 if (host->phase != MSG_OUT) 2361 return int_initio_bad_seq(host); /* Unexpected phase */ 2362 2363 initio_unlink_pend_scb(host, scb); 2364 initio_release_scb(host, scb); 2365 2366 2367 tar = scb->target; /* target */ 2368 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY); 2369 /* clr sync. nego & WDTR flags 07/22/98 */ 2370 2371 /* abort all SCB with same target */ 2372 prev = tmp = host->first_busy; /* Check Busy queue */ 2373 while (tmp != NULL) { 2374 if (tmp->target == tar) { 2375 /* unlink it */ 2376 if (tmp == host->first_busy) { 2377 if ((host->first_busy = tmp->next) == NULL) 2378 host->last_busy = NULL; 2379 } else { 2380 prev->next = tmp->next; 2381 if (tmp == host->last_busy) 2382 host->last_busy = prev; 2383 } 2384 tmp->hastat = HOST_ABORTED; 2385 initio_append_done_scb(host, tmp); 2386 } 2387 /* Previous haven't change */ 2388 else { 2389 prev = tmp; 2390 } 2391 tmp = tmp->next; 2392 } 2393 outb(TARGET_RESET, host->addr + TUL_SFifo); 2394 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd); 2395 return initio_wait_disc(host); 2396 2397} 2398 2399static int initio_msgin_accept(struct initio_host * host) 2400{ 2401 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd); 2402 return wait_tulip(host); 2403} 2404 2405static int wait_tulip(struct initio_host * host) 2406{ 2407 2408 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) 2409 & TSS_INT_PENDING)) 2410 cpu_relax(); 2411 2412 host->jsint = inb(host->addr + TUL_SInt); 2413 host->phase = host->jsstatus0 & TSS_PH_MASK; 2414 host->jsstatus1 = inb(host->addr + TUL_SStatus1); 2415 2416 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */ 2417 return int_initio_resel(host); 2418 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */ 2419 return int_initio_busfree(host); 2420 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */ 2421 return int_initio_scsi_rst(host); 2422 2423 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */ 2424 if (host->flags & HCF_EXPECT_DONE_DISC) { 2425 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */ 2426 initio_unlink_busy_scb(host, host->active); 2427 host->active->hastat = 0; 2428 initio_append_done_scb(host, host->active); 2429 host->active = NULL; 2430 host->active_tc = NULL; 2431 host->flags &= ~HCF_EXPECT_DONE_DISC; 2432 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig); 2433 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */ 2434 return -1; 2435 } 2436 if (host->flags & HCF_EXPECT_DISC) { 2437 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */ 2438 host->active = NULL; 2439 host->active_tc = NULL; 2440 host->flags &= ~HCF_EXPECT_DISC; 2441 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig); 2442 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */ 2443 return -1; 2444 } 2445 return int_initio_busfree(host); 2446 } 2447 /* The old code really does the below. Can probably be removed */ 2448 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) 2449 return host->phase; 2450 return host->phase; 2451} 2452 2453static int initio_wait_disc(struct initio_host * host) 2454{ 2455 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING)) 2456 cpu_relax(); 2457 2458 host->jsint = inb(host->addr + TUL_SInt); 2459 2460 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */ 2461 return int_initio_scsi_rst(host); 2462 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */ 2463 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */ 2464 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig); 2465 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */ 2466 host->active = NULL; 2467 return -1; 2468 } 2469 return initio_bad_seq(host); 2470} 2471 2472static int initio_wait_done_disc(struct initio_host * host) 2473{ 2474 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) 2475 & TSS_INT_PENDING)) 2476 cpu_relax(); 2477 2478 host->jsint = inb(host->addr + TUL_SInt); 2479 2480 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */ 2481 return int_initio_scsi_rst(host); 2482 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */ 2483 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */ 2484 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig); 2485 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */ 2486 initio_unlink_busy_scb(host, host->active); 2487 2488 initio_append_done_scb(host, host->active); 2489 host->active = NULL; 2490 return -1; 2491 } 2492 return initio_bad_seq(host); 2493} 2494 2495/** 2496 * i91u_intr - IRQ handler 2497 * @irqno: IRQ number 2498 * @dev_id: IRQ identifier 2499 * 2500 * Take the relevant locks and then invoke the actual isr processing 2501 * code under the lock. 2502 */ 2503 2504static irqreturn_t i91u_intr(int irqno, void *dev_id) 2505{ 2506 struct Scsi_Host *dev = dev_id; 2507 unsigned long flags; 2508 int r; 2509 2510 spin_lock_irqsave(dev->host_lock, flags); 2511 r = initio_isr((struct initio_host *)dev->hostdata); 2512 spin_unlock_irqrestore(dev->host_lock, flags); 2513 if (r) 2514 return IRQ_HANDLED; 2515 else 2516 return IRQ_NONE; 2517} 2518 2519 2520/** 2521 * initio_build_scb - Build the mappings and SCB 2522 * @host: InitIO host taking the command 2523 * @cblk: Firmware command block 2524 * @cmnd: SCSI midlayer command block 2525 * 2526 * Translate the abstract SCSI command into a firmware command block 2527 * suitable for feeding to the InitIO host controller. This also requires 2528 * we build the scatter gather lists and ensure they are mapped properly. 2529 */ 2530 2531static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd) 2532{ /* Create corresponding SCB */ 2533 struct scatterlist *sglist; 2534 struct sg_entry *sg; /* Pointer to SG list */ 2535 int i, nseg; 2536 long total_len; 2537 dma_addr_t dma_addr; 2538 2539 /* Fill in the command headers */ 2540 cblk->post = i91uSCBPost; /* i91u's callback routine */ 2541 cblk->srb = cmnd; 2542 cblk->opcode = ExecSCSI; 2543 cblk->flags = SCF_POST; /* After SCSI done, call post routine */ 2544 cblk->target = cmnd->device->id; 2545 cblk->lun = cmnd->device->lun; 2546 cblk->ident = cmnd->device->lun | DISC_ALLOW; 2547 2548 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */ 2549 2550 /* Map the sense buffer into bus memory */ 2551 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer, 2552 SENSE_SIZE, DMA_FROM_DEVICE); 2553 cblk->senseptr = (u32)dma_addr; 2554 cblk->senselen = SENSE_SIZE; 2555 initio_priv(cmnd)->sense_dma_addr = dma_addr; 2556 cblk->cdblen = cmnd->cmd_len; 2557 2558 /* Clear the returned status */ 2559 cblk->hastat = 0; 2560 cblk->tastat = 0; 2561 /* Command the command */ 2562 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len); 2563 2564 /* Set up tags */ 2565 if (cmnd->device->tagged_supported) { /* Tag Support */ 2566 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */ 2567 } else { 2568 cblk->tagmsg = 0; /* No tag support */ 2569 } 2570 2571 /* todo handle map_sg error */ 2572 nseg = scsi_dma_map(cmnd); 2573 BUG_ON(nseg < 0); 2574 if (nseg) { 2575 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0], 2576 sizeof(struct sg_entry) * TOTAL_SG_ENTRY, 2577 DMA_BIDIRECTIONAL); 2578 cblk->bufptr = (u32)dma_addr; 2579 initio_priv(cmnd)->sglist_dma_addr = dma_addr; 2580 2581 cblk->sglen = nseg; 2582 2583 cblk->flags |= SCF_SG; /* Turn on SG list flag */ 2584 total_len = 0; 2585 sg = &cblk->sglist[0]; 2586 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) { 2587 sg->data = cpu_to_le32((u32)sg_dma_address(sglist)); 2588 sg->len = cpu_to_le32((u32)sg_dma_len(sglist)); 2589 total_len += sg_dma_len(sglist); 2590 ++sg; 2591 } 2592 2593 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ? 2594 total_len : scsi_bufflen(cmnd); 2595 } else { /* No data transfer required */ 2596 cblk->buflen = 0; 2597 cblk->sglen = 0; 2598 } 2599} 2600 2601/** 2602 * i91u_queuecommand_lck - Queue a new command if possible 2603 * @cmd: SCSI command block from the mid layer 2604 * 2605 * Attempts to queue a new command with the host adapter. Will return 2606 * zero if successful or indicate a host busy condition if not (which 2607 * will cause the mid layer to call us again later with the command) 2608 */ 2609static int i91u_queuecommand_lck(struct scsi_cmnd *cmd) 2610{ 2611 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata; 2612 struct scsi_ctrl_blk *cmnd; 2613 2614 cmnd = initio_alloc_scb(host); 2615 if (!cmnd) 2616 return SCSI_MLQUEUE_HOST_BUSY; 2617 2618 initio_build_scb(host, cmnd, cmd); 2619 initio_exec_scb(host, cmnd); 2620 return 0; 2621} 2622 2623static DEF_SCSI_QCMD(i91u_queuecommand) 2624 2625/** 2626 * i91u_bus_reset - reset the SCSI bus 2627 * @cmnd: Command block we want to trigger the reset for 2628 * 2629 * Initiate a SCSI bus reset sequence 2630 */ 2631 2632static int i91u_bus_reset(struct scsi_cmnd * cmnd) 2633{ 2634 struct initio_host *host; 2635 2636 host = (struct initio_host *) cmnd->device->host->hostdata; 2637 2638 spin_lock_irq(cmnd->device->host->host_lock); 2639 initio_reset_scsi(host, 0); 2640 spin_unlock_irq(cmnd->device->host->host_lock); 2641 2642 return SUCCESS; 2643} 2644 2645/** 2646 * i91u_biosparam - return the "logical geometry 2647 * @sdev: SCSI device 2648 * @dev: Matching block device 2649 * @capacity: Sector size of drive 2650 * @info_array: Return space for BIOS geometry 2651 * 2652 * Map the device geometry in a manner compatible with the host 2653 * controller BIOS behaviour. 2654 * 2655 * FIXME: limited to 2^32 sector devices. 2656 */ 2657 2658static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev, 2659 sector_t capacity, int *info_array) 2660{ 2661 struct initio_host *host; /* Point to Host adapter control block */ 2662 struct target_control *tc; 2663 2664 host = (struct initio_host *) sdev->host->hostdata; 2665 tc = &host->targets[sdev->id]; 2666 2667 if (tc->heads) { 2668 info_array[0] = tc->heads; 2669 info_array[1] = tc->sectors; 2670 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors; 2671 } else { 2672 if (tc->drv_flags & TCF_DRV_255_63) { 2673 info_array[0] = 255; 2674 info_array[1] = 63; 2675 info_array[2] = (unsigned long)capacity / 255 / 63; 2676 } else { 2677 info_array[0] = 64; 2678 info_array[1] = 32; 2679 info_array[2] = (unsigned long)capacity >> 11; 2680 } 2681 } 2682 2683#if defined(DEBUG_BIOSPARAM) 2684 if (i91u_debug & debug_biosparam) { 2685 printk("bios geometry: head=%d, sec=%d, cyl=%d\n", 2686 info_array[0], info_array[1], info_array[2]); 2687 printk("WARNING: check, if the bios geometry is correct.\n"); 2688 } 2689#endif 2690 2691 return 0; 2692} 2693 2694/** 2695 * i91u_unmap_scb - Unmap a command 2696 * @pci_dev: PCI device the command is for 2697 * @cmnd: The command itself 2698 * 2699 * Unmap any PCI mapping/IOMMU resources allocated when the command 2700 * was mapped originally as part of initio_build_scb 2701 */ 2702 2703static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd) 2704{ 2705 /* auto sense buffer */ 2706 if (initio_priv(cmnd)->sense_dma_addr) { 2707 dma_unmap_single(&pci_dev->dev, 2708 initio_priv(cmnd)->sense_dma_addr, 2709 SENSE_SIZE, DMA_FROM_DEVICE); 2710 initio_priv(cmnd)->sense_dma_addr = 0; 2711 } 2712 2713 /* request buffer */ 2714 if (scsi_sg_count(cmnd)) { 2715 dma_unmap_single(&pci_dev->dev, 2716 initio_priv(cmnd)->sglist_dma_addr, 2717 sizeof(struct sg_entry) * TOTAL_SG_ENTRY, 2718 DMA_BIDIRECTIONAL); 2719 2720 scsi_dma_unmap(cmnd); 2721 } 2722} 2723 2724/* 2725 * i91uSCBPost - SCSI callback 2726 * 2727 * This is callback routine be called when tulip finish one 2728 * SCSI command. 2729 */ 2730 2731static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem) 2732{ 2733 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */ 2734 struct initio_host *host; 2735 struct scsi_ctrl_blk *cblk; 2736 2737 host = (struct initio_host *) host_mem; 2738 cblk = (struct scsi_ctrl_blk *) cblk_mem; 2739 if ((cmnd = cblk->srb) == NULL) { 2740 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n"); 2741 WARN_ON(1); 2742 initio_release_scb(host, cblk); /* Release SCB for current channel */ 2743 return; 2744 } 2745 2746 /* 2747 * Remap the firmware error status into a mid layer one 2748 */ 2749 switch (cblk->hastat) { 2750 case 0x0: 2751 case 0xa: /* Linked command complete without error and linked normally */ 2752 case 0xb: /* Linked command complete without error interrupt generated */ 2753 cblk->hastat = 0; 2754 break; 2755 2756 case 0x11: /* Selection time out-The initiator selection or target 2757 reselection was not complete within the SCSI Time out period */ 2758 cblk->hastat = DID_TIME_OUT; 2759 break; 2760 2761 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus 2762 phase sequence was requested by the target. The host adapter 2763 will generate a SCSI Reset Condition, notifying the host with 2764 a SCRD interrupt */ 2765 cblk->hastat = DID_RESET; 2766 break; 2767 2768 case 0x1a: /* SCB Aborted. 07/21/98 */ 2769 cblk->hastat = DID_ABORT; 2770 break; 2771 2772 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data 2773 than was allocated by the Data Length field or the sum of the 2774 Scatter / Gather Data Length fields. */ 2775 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */ 2776 case 0x16: /* Invalid SCB Operation Code. */ 2777 2778 default: 2779 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat); 2780 cblk->hastat = DID_ERROR; /* Couldn't find any better */ 2781 break; 2782 } 2783 2784 cmnd->result = cblk->tastat | (cblk->hastat << 16); 2785 i91u_unmap_scb(host->pci_dev, cmnd); 2786 scsi_done(cmnd); /* Notify system DONE */ 2787 initio_release_scb(host, cblk); /* Release SCB for current channel */ 2788} 2789 2790static const struct scsi_host_template initio_template = { 2791 .proc_name = "INI9100U", 2792 .name = "Initio INI-9X00U/UW SCSI device driver", 2793 .queuecommand = i91u_queuecommand, 2794 .eh_bus_reset_handler = i91u_bus_reset, 2795 .bios_param = i91u_biosparam, 2796 .can_queue = MAX_TARGETS * i91u_MAXQUEUE, 2797 .this_id = 1, 2798 .sg_tablesize = SG_ALL, 2799 .cmd_size = sizeof(struct initio_cmd_priv), 2800}; 2801 2802static int initio_probe_one(struct pci_dev *pdev, 2803 const struct pci_device_id *id) 2804{ 2805 struct Scsi_Host *shost; 2806 struct initio_host *host; 2807 u32 reg; 2808 u16 bios_seg; 2809 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */; 2810 int num_scb, i, error; 2811 2812 error = pci_enable_device(pdev); 2813 if (error) 2814 return error; 2815 2816 pci_read_config_dword(pdev, 0x44, (u32 *) & reg); 2817 bios_seg = (u16) (reg & 0xFF); 2818 if (((reg & 0xFF00) >> 8) == 0xFF) 2819 reg = 0; 2820 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8)); 2821 2822 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { 2823 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n"); 2824 error = -ENODEV; 2825 goto out_disable_device; 2826 } 2827 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host)); 2828 if (!shost) { 2829 printk(KERN_WARNING "initio: Could not allocate host structure.\n"); 2830 error = -ENOMEM; 2831 goto out_disable_device; 2832 } 2833 host = (struct initio_host *)shost->hostdata; 2834 memset(host, 0, sizeof(struct initio_host)); 2835 host->addr = pci_resource_start(pdev, 0); 2836 host->bios_addr = bios_seg; 2837 2838 if (!request_region(host->addr, 256, "i91u")) { 2839 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr); 2840 error = -ENODEV; 2841 goto out_host_put; 2842 } 2843 2844 if (initio_tag_enable) /* 1.01i */ 2845 num_scb = MAX_TARGETS * i91u_MAXQUEUE; 2846 else 2847 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */ 2848 2849 for (; num_scb >= MAX_TARGETS + 3; num_scb--) { 2850 i = num_scb * sizeof(struct scsi_ctrl_blk); 2851 scb = kzalloc(i, GFP_KERNEL); 2852 if (scb) 2853 break; 2854 } 2855 2856 if (!scb) { 2857 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n"); 2858 error = -ENOMEM; 2859 goto out_release_region; 2860 } 2861 2862 host->pci_dev = pdev; 2863 2864 host->semaph = 1; 2865 spin_lock_init(&host->semaph_lock); 2866 host->num_scbs = num_scb; 2867 host->scb = scb; 2868 host->next_pending = scb; 2869 host->next_avail = scb; 2870 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) { 2871 tmp->tagid = i; 2872 if (i != 0) 2873 prev->next = tmp; 2874 prev = tmp; 2875 } 2876 prev->next = NULL; 2877 host->scb_end = tmp; 2878 host->first_avail = scb; 2879 host->last_avail = prev; 2880 spin_lock_init(&host->avail_lock); 2881 2882 initio_init(host, phys_to_virt(((u32)bios_seg << 4))); 2883 2884 host->jsstatus0 = 0; 2885 2886 shost->io_port = host->addr; 2887 shost->n_io_port = 0xff; 2888 shost->can_queue = num_scb; /* 03/05/98 */ 2889 shost->unique_id = host->addr; 2890 shost->max_id = host->max_tar; 2891 shost->max_lun = 32; /* 10/21/97 */ 2892 shost->irq = pdev->irq; 2893 shost->this_id = host->scsi_id; /* Assign HCS index */ 2894 shost->base = host->addr; 2895 shost->sg_tablesize = TOTAL_SG_ENTRY; 2896 2897 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost); 2898 if (error < 0) { 2899 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq); 2900 goto out_free_scbs; 2901 } 2902 2903 pci_set_drvdata(pdev, shost); 2904 2905 error = scsi_add_host(shost, &pdev->dev); 2906 if (error) 2907 goto out_free_irq; 2908 scsi_scan_host(shost); 2909 return 0; 2910out_free_irq: 2911 free_irq(pdev->irq, shost); 2912out_free_scbs: 2913 kfree(host->scb); 2914out_release_region: 2915 release_region(host->addr, 256); 2916out_host_put: 2917 scsi_host_put(shost); 2918out_disable_device: 2919 pci_disable_device(pdev); 2920 return error; 2921} 2922 2923/** 2924 * initio_remove_one - control shutdown 2925 * @pdev: PCI device being released 2926 * 2927 * Release the resources assigned to this adapter after it has 2928 * finished being used. 2929 */ 2930 2931static void initio_remove_one(struct pci_dev *pdev) 2932{ 2933 struct Scsi_Host *host = pci_get_drvdata(pdev); 2934 struct initio_host *s = (struct initio_host *)host->hostdata; 2935 scsi_remove_host(host); 2936 free_irq(pdev->irq, host); 2937 release_region(s->addr, 256); 2938 scsi_host_put(host); 2939 pci_disable_device(pdev); 2940} 2941 2942MODULE_LICENSE("GPL"); 2943 2944static struct pci_device_id initio_pci_tbl[] = { 2945 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2946 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2947 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2948 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2949 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 2950 {0,} 2951}; 2952MODULE_DEVICE_TABLE(pci, initio_pci_tbl); 2953 2954static struct pci_driver initio_pci_driver = { 2955 .name = "initio", 2956 .id_table = initio_pci_tbl, 2957 .probe = initio_probe_one, 2958 .remove = initio_remove_one, 2959}; 2960module_pci_driver(initio_pci_driver); 2961 2962MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver"); 2963MODULE_AUTHOR("Initio Corporation"); 2964MODULE_LICENSE("GPL"); 2965