1/* 2 * dc395x.c 3 * 4 * Device Driver for Tekram DC395(U/UW/F), DC315(U) 5 * PCI SCSI Bus Master Host Adapter 6 * (SCSI chip set used Tekram ASIC TRM-S1040) 7 * 8 * Authors: 9 * C.L. Huang <ching@tekram.com.tw> 10 * Erich Chen <erich@tekram.com.tw> 11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. 12 * 13 * Kurt Garloff <garloff@suse.de> 14 * (C) 1999-2000 Kurt Garloff 15 * 16 * Oliver Neukum <oliver@neukum.name> 17 * Ali Akcaagac <aliakc@web.de> 18 * Jamie Lenehan <lenehan@twibble.org> 19 * (C) 2003 20 * 21 * License: GNU GPL 22 * 23 ************************************************************************* 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. The name of the author may not be used to endorse or promote products 34 * derived from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 ************************************************************************ 48 */ 49#include <linux/module.h> 50#include <linux/moduleparam.h> 51#include <linux/delay.h> 52#include <linux/ctype.h> 53#include <linux/blkdev.h> 54#include <linux/interrupt.h> 55#include <linux/init.h> 56#include <linux/spinlock.h> 57#include <linux/pci.h> 58#include <linux/list.h> 59#include <linux/vmalloc.h> 60#include <linux/slab.h> 61#include <asm/io.h> 62 63#include <scsi/scsi.h> 64#include <scsi/scsi_cmnd.h> 65#include <scsi/scsi_device.h> 66#include <scsi/scsi_host.h> 67 68#include "dc395x.h" 69 70#define DC395X_NAME "dc395x" 71#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" 72#define DC395X_VERSION "v2.05, 2004/03/08" 73 74/*--------------------------------------------------------------------------- 75 Features 76 ---------------------------------------------------------------------------*/ 77/* 78 * Set to disable parts of the driver 79 */ 80/*#define DC395x_NO_DISCONNECT*/ 81/*#define DC395x_NO_TAGQ*/ 82/*#define DC395x_NO_SYNC*/ 83/*#define DC395x_NO_WIDE*/ 84 85/*--------------------------------------------------------------------------- 86 Debugging 87 ---------------------------------------------------------------------------*/ 88/* 89 * Types of debugging that can be enabled and disabled 90 */ 91#define DBG_KG 0x0001 92#define DBG_0 0x0002 93#define DBG_1 0x0004 94#define DBG_SG 0x0020 95#define DBG_FIFO 0x0040 96#define DBG_PIO 0x0080 97 98 99/* 100 * Set set of things to output debugging for. 101 * Undefine to remove all debugging 102 */ 103/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ 104/*#define DEBUG_MASK DBG_0*/ 105 106 107/* 108 * Output a kernel mesage at the specified level and append the 109 * driver name and a ": " to the start of the message 110 */ 111#define dprintkl(level, format, arg...) \ 112 printk(level DC395X_NAME ": " format , ## arg) 113 114 115#ifdef DEBUG_MASK 116/* 117 * print a debug message - this is formated with KERN_DEBUG, then the 118 * driver name followed by a ": " and then the message is output. 119 * This also checks that the specified debug level is enabled before 120 * outputing the message 121 */ 122#define dprintkdbg(type, format, arg...) \ 123 do { \ 124 if ((type) & (DEBUG_MASK)) \ 125 dprintkl(KERN_DEBUG , format , ## arg); \ 126 } while (0) 127 128/* 129 * Check if the specified type of debugging is enabled 130 */ 131#define debug_enabled(type) ((DEBUG_MASK) & (type)) 132 133#else 134/* 135 * No debugging. Do nothing 136 */ 137#define dprintkdbg(type, format, arg...) \ 138 do {} while (0) 139#define debug_enabled(type) (0) 140 141#endif 142 143 144#ifndef PCI_VENDOR_ID_TEKRAM 145#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ 146#endif 147#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 148#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ 149#endif 150 151 152#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) 153#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) 154 155#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) 156#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) 157#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) 158#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) 159#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) 160#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) 161 162/* cmd->result */ 163#define RES_TARGET 0x000000FF /* Target State */ 164#define RES_TARGET_LNX STATUS_MASK /* Only official ... */ 165#define RES_ENDMSG 0x0000FF00 /* End Message */ 166#define RES_DID 0x00FF0000 /* DID_ codes */ 167#define RES_DRV 0xFF000000 /* DRIVER_ codes */ 168 169#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) 170#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) 171 172#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } 173#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } 174#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } 175#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } 176#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } 177 178#define TAG_NONE 255 179 180/* 181 * srb->segement_x is the hw sg list. It is always allocated as a 182 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not 183 * cross a page boundy. 184 */ 185#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) 186 187 188struct SGentry { 189 u32 address; /* bus! address */ 190 u32 length; 191}; 192 193/* The SEEPROM structure for TRM_S1040 */ 194struct NVRamTarget { 195 u8 cfg0; /* Target configuration byte 0 */ 196 u8 period; /* Target period */ 197 u8 cfg2; /* Target configuration byte 2 */ 198 u8 cfg3; /* Target configuration byte 3 */ 199}; 200 201struct NvRamType { 202 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ 203 u8 sub_sys_id[2]; /* 2,3 Sub System ID */ 204 u8 sub_class; /* 4 Sub Class */ 205 u8 vendor_id[2]; /* 5,6 Vendor ID */ 206 u8 device_id[2]; /* 7,8 Device ID */ 207 u8 reserved; /* 9 Reserved */ 208 struct NVRamTarget target[DC395x_MAX_SCSI_ID]; 209 /** 10,11,12,13 210 ** 14,15,16,17 211 ** .... 212 ** .... 213 ** 70,71,72,73 214 */ 215 u8 scsi_id; /* 74 Host Adapter SCSI ID */ 216 u8 channel_cfg; /* 75 Channel configuration */ 217 u8 delay_time; /* 76 Power on delay time */ 218 u8 max_tag; /* 77 Maximum tags */ 219 u8 reserved0; /* 78 */ 220 u8 boot_target; /* 79 */ 221 u8 boot_lun; /* 80 */ 222 u8 reserved1; /* 81 */ 223 u16 reserved2[22]; /* 82,..125 */ 224 u16 cksum; /* 126,127 */ 225}; 226 227struct ScsiReqBlk { 228 struct list_head list; /* next/prev ptrs for srb lists */ 229 struct DeviceCtlBlk *dcb; 230 struct scsi_cmnd *cmd; 231 232 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ 233 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ 234 235 u8 sg_count; /* No of HW sg entries for this request */ 236 u8 sg_index; /* Index of HW sg entry for this request */ 237 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */ 238 size_t request_length; /* Total number of bytes in this request */ 239 /* 240 * The sense buffer handling function, request_sense, uses 241 * the first hw sg entry (segment_x[0]) and the transfer 242 * length (total_xfer_length). While doing this it stores the 243 * original values into the last sg hw list 244 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the 245 * total_xfer_length in xferred. These values are restored in 246 * pci_unmap_srb_sense. This is the only place xferred is used. 247 */ 248 size_t xferred; /* Saved copy of total_xfer_length */ 249 250 u16 state; 251 252 u8 msgin_buf[6]; 253 u8 msgout_buf[6]; 254 255 u8 adapter_status; 256 u8 target_status; 257 u8 msg_count; 258 u8 end_message; 259 260 u8 tag_number; 261 u8 status; 262 u8 retry_count; 263 u8 flag; 264 265 u8 scsi_phase; 266}; 267 268struct DeviceCtlBlk { 269 struct list_head list; /* next/prev ptrs for the dcb list */ 270 struct AdapterCtlBlk *acb; 271 struct list_head srb_going_list; /* head of going srb list */ 272 struct list_head srb_waiting_list; /* head of waiting srb list */ 273 274 struct ScsiReqBlk *active_srb; 275 u32 tag_mask; 276 277 u16 max_command; 278 279 u8 target_id; /* SCSI Target ID (SCSI Only) */ 280 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ 281 u8 identify_msg; 282 u8 dev_mode; 283 284 u8 inquiry7; /* To store Inquiry flags */ 285 u8 sync_mode; /* 0:async mode */ 286 u8 min_nego_period; /* for nego. */ 287 u8 sync_period; /* for reg. */ 288 289 u8 sync_offset; /* for reg. and nego.(low nibble) */ 290 u8 flag; 291 u8 dev_type; 292 u8 init_tcq_flag; 293}; 294 295struct AdapterCtlBlk { 296 struct Scsi_Host *scsi_host; 297 298 unsigned long io_port_base; 299 unsigned long io_port_len; 300 301 struct list_head dcb_list; /* head of going dcb list */ 302 struct DeviceCtlBlk *dcb_run_robin; 303 struct DeviceCtlBlk *active_dcb; 304 305 struct list_head srb_free_list; /* head of free srb list */ 306 struct ScsiReqBlk *tmp_srb; 307 struct timer_list waiting_timer; 308 struct timer_list selto_timer; 309 310 unsigned long last_reset; 311 312 u16 srb_count; 313 314 u8 sel_timeout; 315 316 unsigned int irq_level; 317 u8 tag_max_num; 318 u8 acb_flag; 319 u8 gmode2; 320 321 u8 config; 322 u8 lun_chk; 323 u8 scan_devices; 324 u8 hostid_bit; 325 326 u8 dcb_map[DC395x_MAX_SCSI_ID]; 327 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 328 329 struct pci_dev *dev; 330 331 u8 msg_len; 332 333 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 334 struct ScsiReqBlk srb; 335 336 struct NvRamType eeprom; /* eeprom settings for this adapter */ 337}; 338 339 340/*--------------------------------------------------------------------------- 341 Forward declarations 342 ---------------------------------------------------------------------------*/ 343static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 344 u16 *pscsi_status); 345static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 346 u16 *pscsi_status); 347static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 348 u16 *pscsi_status); 349static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 350 u16 *pscsi_status); 351static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 352 u16 *pscsi_status); 353static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 354 u16 *pscsi_status); 355static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 356 u16 *pscsi_status); 357static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 358 u16 *pscsi_status); 359static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 360 u16 *pscsi_status); 361static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 362 u16 *pscsi_status); 363static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 364 u16 *pscsi_status); 365static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 366 u16 *pscsi_status); 367static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 368 u16 *pscsi_status); 369static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 370 u16 *pscsi_status); 371static void set_basic_config(struct AdapterCtlBlk *acb); 372static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 373 struct ScsiReqBlk *srb); 374static void reset_scsi_bus(struct AdapterCtlBlk *acb); 375static void data_io_transfer(struct AdapterCtlBlk *acb, 376 struct ScsiReqBlk *srb, u16 io_dir); 377static void disconnect(struct AdapterCtlBlk *acb); 378static void reselect(struct AdapterCtlBlk *acb); 379static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 380 struct ScsiReqBlk *srb); 381static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 382 struct ScsiReqBlk *srb); 383static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 384 struct ScsiReqBlk *srb); 385static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 386 struct scsi_cmnd *cmd, u8 force); 387static void scsi_reset_detect(struct AdapterCtlBlk *acb); 388static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 389static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 390 struct ScsiReqBlk *srb); 391static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 392 struct ScsiReqBlk *srb); 393static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 394 struct ScsiReqBlk *srb); 395static void set_xfer_rate(struct AdapterCtlBlk *acb, 396 struct DeviceCtlBlk *dcb); 397static void waiting_timeout(struct timer_list *t); 398 399 400/*--------------------------------------------------------------------------- 401 Static Data 402 ---------------------------------------------------------------------------*/ 403static u16 current_sync_offset = 0; 404 405static void *dc395x_scsi_phase0[] = { 406 data_out_phase0,/* phase:0 */ 407 data_in_phase0, /* phase:1 */ 408 command_phase0, /* phase:2 */ 409 status_phase0, /* phase:3 */ 410 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 411 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 412 msgout_phase0, /* phase:6 */ 413 msgin_phase0, /* phase:7 */ 414}; 415 416static void *dc395x_scsi_phase1[] = { 417 data_out_phase1,/* phase:0 */ 418 data_in_phase1, /* phase:1 */ 419 command_phase1, /* phase:2 */ 420 status_phase1, /* phase:3 */ 421 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 422 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 423 msgout_phase1, /* phase:6 */ 424 msgin_phase1, /* phase:7 */ 425}; 426 427/* 428 *Fast20: 000 50ns, 20.0 MHz 429 * 001 75ns, 13.3 MHz 430 * 010 100ns, 10.0 MHz 431 * 011 125ns, 8.0 MHz 432 * 100 150ns, 6.6 MHz 433 * 101 175ns, 5.7 MHz 434 * 110 200ns, 5.0 MHz 435 * 111 250ns, 4.0 MHz 436 * 437 *Fast40(LVDS): 000 25ns, 40.0 MHz 438 * 001 50ns, 20.0 MHz 439 * 010 75ns, 13.3 MHz 440 * 011 100ns, 10.0 MHz 441 * 100 125ns, 8.0 MHz 442 * 101 150ns, 6.6 MHz 443 * 110 175ns, 5.7 MHz 444 * 111 200ns, 5.0 MHz 445 */ 446/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 447 448/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 449static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 450static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 451 452 453/*--------------------------------------------------------------------------- 454 Configuration 455 ---------------------------------------------------------------------------*/ 456/* 457 * Module/boot parameters currently effect *all* instances of the 458 * card in the system. 459 */ 460 461/* 462 * Command line parameters are stored in a structure below. 463 * These are the index's into the structure for the various 464 * command line options. 465 */ 466#define CFG_ADAPTER_ID 0 467#define CFG_MAX_SPEED 1 468#define CFG_DEV_MODE 2 469#define CFG_ADAPTER_MODE 3 470#define CFG_TAGS 4 471#define CFG_RESET_DELAY 5 472 473#define CFG_NUM 6 /* number of configuration items */ 474 475 476/* 477 * Value used to indicate that a command line override 478 * hasn't been used to modify the value. 479 */ 480#define CFG_PARAM_UNSET -1 481 482 483/* 484 * Hold command line parameters. 485 */ 486struct ParameterData { 487 int value; /* value of this setting */ 488 int min; /* minimum value */ 489 int max; /* maximum value */ 490 int def; /* default value */ 491 int safe; /* safe value */ 492}; 493static struct ParameterData cfg_data[] = { 494 { /* adapter id */ 495 CFG_PARAM_UNSET, 496 0, 497 15, 498 7, 499 7 500 }, 501 { /* max speed */ 502 CFG_PARAM_UNSET, 503 0, 504 7, 505 1, /* 13.3Mhz */ 506 4, /* 6.7Hmz */ 507 }, 508 { /* dev mode */ 509 CFG_PARAM_UNSET, 510 0, 511 0x3f, 512 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 513 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 514 NTC_DO_SEND_START, 515 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 516 }, 517 { /* adapter mode */ 518 CFG_PARAM_UNSET, 519 0, 520 0x2f, 521 NAC_SCANLUN | 522 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET 523 /*| NAC_ACTIVE_NEG*/, 524 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 525 }, 526 { /* tags */ 527 CFG_PARAM_UNSET, 528 0, 529 5, 530 3, /* 16 tags (??) */ 531 2, 532 }, 533 { /* reset delay */ 534 CFG_PARAM_UNSET, 535 0, 536 180, 537 1, /* 1 second */ 538 10, /* 10 seconds */ 539 } 540}; 541 542 543/* 544 * Safe settings. If set to zero the BIOS/default values with 545 * command line overrides will be used. If set to 1 then safe and 546 * slow settings will be used. 547 */ 548static bool use_safe_settings = 0; 549module_param_named(safe, use_safe_settings, bool, 0); 550MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); 551 552 553module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); 554MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); 555 556module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); 557MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); 558 559module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); 560MODULE_PARM_DESC(dev_mode, "Device mode."); 561 562module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); 563MODULE_PARM_DESC(adapter_mode, "Adapter mode."); 564 565module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); 566MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); 567 568module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); 569MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); 570 571 572/** 573 * set_safe_settings - if the use_safe_settings option is set then 574 * set all values to the safe and slow values. 575 **/ 576static void set_safe_settings(void) 577{ 578 if (use_safe_settings) 579 { 580 int i; 581 582 dprintkl(KERN_INFO, "Using safe settings.\n"); 583 for (i = 0; i < CFG_NUM; i++) 584 { 585 cfg_data[i].value = cfg_data[i].safe; 586 } 587 } 588} 589 590 591/** 592 * fix_settings - reset any boot parameters which are out of range 593 * back to the default values. 594 **/ 595static void fix_settings(void) 596{ 597 int i; 598 599 dprintkdbg(DBG_1, 600 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " 601 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", 602 cfg_data[CFG_ADAPTER_ID].value, 603 cfg_data[CFG_MAX_SPEED].value, 604 cfg_data[CFG_DEV_MODE].value, 605 cfg_data[CFG_ADAPTER_MODE].value, 606 cfg_data[CFG_TAGS].value, 607 cfg_data[CFG_RESET_DELAY].value); 608 for (i = 0; i < CFG_NUM; i++) 609 { 610 if (cfg_data[i].value < cfg_data[i].min 611 || cfg_data[i].value > cfg_data[i].max) 612 cfg_data[i].value = cfg_data[i].def; 613 } 614} 615 616 617 618/* 619 * Mapping from the eeprom delay index value (index into this array) 620 * to the number of actual seconds that the delay should be for. 621 */ 622static char eeprom_index_to_delay_map[] = 623 { 1, 3, 5, 10, 16, 30, 60, 120 }; 624 625 626/** 627 * eeprom_index_to_delay - Take the eeprom delay setting and convert it 628 * into a number of seconds. 629 * 630 * @eeprom: The eeprom structure in which we find the delay index to map. 631 **/ 632static void eeprom_index_to_delay(struct NvRamType *eeprom) 633{ 634 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; 635} 636 637 638/** 639 * delay_to_eeprom_index - Take a delay in seconds and return the 640 * closest eeprom index which will delay for at least that amount of 641 * seconds. 642 * 643 * @delay: The delay, in seconds, to find the eeprom index for. 644 **/ 645static int delay_to_eeprom_index(int delay) 646{ 647 u8 idx = 0; 648 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) 649 idx++; 650 return idx; 651} 652 653 654/** 655 * eeprom_override - Override the eeprom settings, in the provided 656 * eeprom structure, with values that have been set on the command 657 * line. 658 * 659 * @eeprom: The eeprom data to override with command line options. 660 **/ 661static void eeprom_override(struct NvRamType *eeprom) 662{ 663 u8 id; 664 665 /* Adapter Settings */ 666 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) 667 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; 668 669 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) 670 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; 671 672 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) 673 eeprom->delay_time = delay_to_eeprom_index( 674 cfg_data[CFG_RESET_DELAY].value); 675 676 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) 677 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; 678 679 /* Device Settings */ 680 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { 681 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) 682 eeprom->target[id].cfg0 = 683 (u8)cfg_data[CFG_DEV_MODE].value; 684 685 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) 686 eeprom->target[id].period = 687 (u8)cfg_data[CFG_MAX_SPEED].value; 688 689 } 690} 691 692 693/*--------------------------------------------------------------------------- 694 ---------------------------------------------------------------------------*/ 695 696static unsigned int list_size(struct list_head *head) 697{ 698 unsigned int count = 0; 699 struct list_head *pos; 700 list_for_each(pos, head) 701 count++; 702 return count; 703} 704 705 706static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, 707 struct DeviceCtlBlk *pos) 708{ 709 int use_next = 0; 710 struct DeviceCtlBlk* next = NULL; 711 struct DeviceCtlBlk* i; 712 713 if (list_empty(head)) 714 return NULL; 715 716 /* find supplied dcb and then select the next one */ 717 list_for_each_entry(i, head, list) 718 if (use_next) { 719 next = i; 720 break; 721 } else if (i == pos) { 722 use_next = 1; 723 } 724 /* if no next one take the head one (ie, wraparound) */ 725 if (!next) 726 list_for_each_entry(i, head, list) { 727 next = i; 728 break; 729 } 730 731 return next; 732} 733 734 735static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 736{ 737 if (srb->tag_number < 255) { 738 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ 739 srb->tag_number = 255; 740 } 741} 742 743 744/* Find cmd in SRB list */ 745static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 746 struct list_head *head) 747{ 748 struct ScsiReqBlk *i; 749 list_for_each_entry(i, head, list) 750 if (i->cmd == cmd) 751 return i; 752 return NULL; 753} 754 755/* Sets the timer to wake us up */ 756static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 757{ 758 if (timer_pending(&acb->waiting_timer)) 759 return; 760 if (time_before(jiffies + to, acb->last_reset - HZ / 2)) 761 acb->waiting_timer.expires = 762 acb->last_reset - HZ / 2 + 1; 763 else 764 acb->waiting_timer.expires = jiffies + to + 1; 765 add_timer(&acb->waiting_timer); 766} 767 768 769/* Send the next command from the waiting list to the bus */ 770static void waiting_process_next(struct AdapterCtlBlk *acb) 771{ 772 struct DeviceCtlBlk *start = NULL; 773 struct DeviceCtlBlk *pos; 774 struct DeviceCtlBlk *dcb; 775 struct ScsiReqBlk *srb; 776 struct list_head *dcb_list_head = &acb->dcb_list; 777 778 if (acb->active_dcb 779 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 780 return; 781 782 if (timer_pending(&acb->waiting_timer)) 783 del_timer(&acb->waiting_timer); 784 785 if (list_empty(dcb_list_head)) 786 return; 787 788 /* 789 * Find the starting dcb. Need to find it again in the list 790 * since the list may have changed since we set the ptr to it 791 */ 792 list_for_each_entry(dcb, dcb_list_head, list) 793 if (dcb == acb->dcb_run_robin) { 794 start = dcb; 795 break; 796 } 797 if (!start) { 798 /* This can happen! */ 799 start = list_entry(dcb_list_head->next, typeof(*start), list); 800 acb->dcb_run_robin = start; 801 } 802 803 804 /* 805 * Loop over the dcb, but we start somewhere (potentially) in 806 * the middle of the loop so we need to manully do this. 807 */ 808 pos = start; 809 do { 810 struct list_head *waiting_list_head = &pos->srb_waiting_list; 811 812 /* Make sure, the next another device gets scheduled ... */ 813 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 814 acb->dcb_run_robin); 815 816 if (list_empty(waiting_list_head) || 817 pos->max_command <= list_size(&pos->srb_going_list)) { 818 /* move to next dcb */ 819 pos = dcb_get_next(dcb_list_head, pos); 820 } else { 821 srb = list_entry(waiting_list_head->next, 822 struct ScsiReqBlk, list); 823 824 /* Try to send to the bus */ 825 if (!start_scsi(acb, pos, srb)) 826 list_move(&srb->list, &pos->srb_going_list); 827 else 828 waiting_set_timer(acb, HZ/50); 829 break; 830 } 831 } while (pos != start); 832} 833 834 835/* Wake up waiting queue */ 836static void waiting_timeout(struct timer_list *t) 837{ 838 unsigned long flags; 839 struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer); 840 dprintkdbg(DBG_1, 841 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 842 DC395x_LOCK_IO(acb->scsi_host, flags); 843 waiting_process_next(acb); 844 DC395x_UNLOCK_IO(acb->scsi_host, flags); 845} 846 847 848/* Get the DCB for a given ID/LUN combination */ 849static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 850{ 851 return acb->children[id][lun]; 852} 853 854 855/* Send SCSI Request Block (srb) to adapter (acb) */ 856static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 857{ 858 struct DeviceCtlBlk *dcb = srb->dcb; 859 860 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 861 acb->active_dcb || 862 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 863 list_add_tail(&srb->list, &dcb->srb_waiting_list); 864 waiting_process_next(acb); 865 return; 866 } 867 868 if (!start_scsi(acb, dcb, srb)) { 869 list_add_tail(&srb->list, &dcb->srb_going_list); 870 } else { 871 list_add(&srb->list, &dcb->srb_waiting_list); 872 waiting_set_timer(acb, HZ / 50); 873 } 874} 875 876/* Prepare SRB for being sent to Device DCB w/ command *cmd */ 877static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 878 struct ScsiReqBlk *srb) 879{ 880 int nseg; 881 enum dma_data_direction dir = cmd->sc_data_direction; 882 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", 883 cmd, dcb->target_id, dcb->target_lun); 884 885 srb->dcb = dcb; 886 srb->cmd = cmd; 887 srb->sg_count = 0; 888 srb->total_xfer_length = 0; 889 srb->sg_bus_addr = 0; 890 srb->sg_index = 0; 891 srb->adapter_status = 0; 892 srb->target_status = 0; 893 srb->msg_count = 0; 894 srb->status = 0; 895 srb->flag = 0; 896 srb->state = 0; 897 srb->retry_count = 0; 898 srb->tag_number = TAG_NONE; 899 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 900 srb->end_message = 0; 901 902 nseg = scsi_dma_map(cmd); 903 BUG_ON(nseg < 0); 904 905 if (dir == DMA_NONE || !nseg) { 906 dprintkdbg(DBG_0, 907 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 908 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), 909 srb->segment_x[0].address); 910 } else { 911 int i; 912 u32 reqlen = scsi_bufflen(cmd); 913 struct scatterlist *sg; 914 struct SGentry *sgp = srb->segment_x; 915 916 srb->sg_count = nseg; 917 918 dprintkdbg(DBG_0, 919 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 920 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), 921 srb->sg_count); 922 923 scsi_for_each_sg(cmd, sg, srb->sg_count, i) { 924 u32 busaddr = (u32)sg_dma_address(sg); 925 u32 seglen = (u32)sg->length; 926 sgp[i].address = busaddr; 927 sgp[i].length = seglen; 928 srb->total_xfer_length += seglen; 929 } 930 sgp += srb->sg_count - 1; 931 932 /* 933 * adjust last page if too big as it is allocated 934 * on even page boundaries 935 */ 936 if (srb->total_xfer_length > reqlen) { 937 sgp->length -= (srb->total_xfer_length - reqlen); 938 srb->total_xfer_length = reqlen; 939 } 940 941 /* Fixup for WIDE padding - make sure length is even */ 942 if (dcb->sync_period & WIDE_SYNC && 943 srb->total_xfer_length % 2) { 944 srb->total_xfer_length++; 945 sgp->length++; 946 } 947 948 srb->sg_bus_addr = dma_map_single(&dcb->acb->dev->dev, 949 srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE); 950 951 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 952 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 953 } 954 955 srb->request_length = srb->total_xfer_length; 956} 957 958 959/** 960 * dc395x_queue_command - queue scsi command passed from the mid 961 * layer, invoke 'done' on completion 962 * 963 * @cmd: pointer to scsi command object 964 * @done: function pointer to be invoked on completion 965 * 966 * Returns 1 if the adapter (host) is busy, else returns 0. One 967 * reason for an adapter to be busy is that the number 968 * of outstanding queued commands is already equal to 969 * struct Scsi_Host::can_queue . 970 * 971 * Required: if struct Scsi_Host::can_queue is ever non-zero 972 * then this function is required. 973 * 974 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 975 * and is expected to be held on return. 976 * 977 **/ 978static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 979{ 980 struct DeviceCtlBlk *dcb; 981 struct ScsiReqBlk *srb; 982 struct AdapterCtlBlk *acb = 983 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 984 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n", 985 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]); 986 987 /* Assume BAD_TARGET; will be cleared later */ 988 cmd->result = DID_BAD_TARGET << 16; 989 990 /* ignore invalid targets */ 991 if (cmd->device->id >= acb->scsi_host->max_id || 992 cmd->device->lun >= acb->scsi_host->max_lun || 993 cmd->device->lun >31) { 994 goto complete; 995 } 996 997 /* does the specified lun on the specified device exist */ 998 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 999 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1000 cmd->device->id, (u8)cmd->device->lun); 1001 goto complete; 1002 } 1003 1004 /* do we have a DCB for the device */ 1005 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1006 if (!dcb) { 1007 /* should never happen */ 1008 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1009 cmd->device->id, (u8)cmd->device->lun); 1010 goto complete; 1011 } 1012 1013 /* set callback and clear result in the command */ 1014 cmd->scsi_done = done; 1015 cmd->result = 0; 1016 1017 srb = list_first_entry_or_null(&acb->srb_free_list, 1018 struct ScsiReqBlk, list); 1019 if (!srb) { 1020 /* 1021 * Return 1 since we are unable to queue this command at this 1022 * point in time. 1023 */ 1024 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1025 return 1; 1026 } 1027 list_del(&srb->list); 1028 1029 build_srb(cmd, dcb, srb); 1030 1031 if (!list_empty(&dcb->srb_waiting_list)) { 1032 /* append to waiting queue */ 1033 list_add_tail(&srb->list, &dcb->srb_waiting_list); 1034 waiting_process_next(acb); 1035 } else { 1036 /* process immediately */ 1037 send_srb(acb, srb); 1038 } 1039 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); 1040 return 0; 1041 1042complete: 1043 /* 1044 * Complete the command immediatey, and then return 0 to 1045 * indicate that we have handled the command. This is usually 1046 * done when the commad is for things like non existent 1047 * devices. 1048 */ 1049 done(cmd); 1050 return 0; 1051} 1052 1053static DEF_SCSI_QCMD(dc395x_queue_command) 1054 1055static void dump_register_info(struct AdapterCtlBlk *acb, 1056 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1057{ 1058 u16 pstat; 1059 struct pci_dev *dev = acb->dev; 1060 pci_read_config_word(dev, PCI_STATUS, &pstat); 1061 if (!dcb) 1062 dcb = acb->active_dcb; 1063 if (!srb && dcb) 1064 srb = dcb->active_srb; 1065 if (srb) { 1066 if (!srb->cmd) 1067 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1068 srb, srb->cmd); 1069 else 1070 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p " 1071 "cmnd=0x%02x <%02i-%i>\n", 1072 srb, srb->cmd, 1073 srb->cmd->cmnd[0], srb->cmd->device->id, 1074 (u8)srb->cmd->device->lun); 1075 printk(" sglist=%p cnt=%i idx=%i len=%zu\n", 1076 srb->segment_x, srb->sg_count, srb->sg_index, 1077 srb->total_xfer_length); 1078 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1079 srb->state, srb->status, srb->scsi_phase, 1080 (acb->active_dcb) ? "" : "not"); 1081 } 1082 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1083 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1084 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1085 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1086 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1087 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1088 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1089 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1090 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1091 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1092 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1093 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1094 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1095 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1096 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1097 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1098 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1099 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1100 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1101 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1102 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1103 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1104 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1105 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1106 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1107 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1108 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1109 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1110 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1111 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1112 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1113 "pci{status=0x%04x}\n", 1114 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1115 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1116 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1117 pstat); 1118} 1119 1120 1121static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1122{ 1123#if debug_enabled(DBG_FIFO) 1124 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1125 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1126 if (!(fifocnt & 0x40)) 1127 dprintkdbg(DBG_FIFO, 1128 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1129 fifocnt & 0x3f, lines, txt); 1130#endif 1131 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1132} 1133 1134 1135static void reset_dev_param(struct AdapterCtlBlk *acb) 1136{ 1137 struct DeviceCtlBlk *dcb; 1138 struct NvRamType *eeprom = &acb->eeprom; 1139 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1140 1141 list_for_each_entry(dcb, &acb->dcb_list, list) { 1142 u8 period_index; 1143 1144 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1145 dcb->sync_period = 0; 1146 dcb->sync_offset = 0; 1147 1148 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1149 period_index = eeprom->target[dcb->target_id].period & 0x07; 1150 dcb->min_nego_period = clock_period[period_index]; 1151 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1152 || !(acb->config & HCC_WIDE_CARD)) 1153 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1154 } 1155} 1156 1157 1158/* 1159 * perform a hard reset on the SCSI bus 1160 * @cmd - some command for this host (for fetching hooks) 1161 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1162 */ 1163static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1164{ 1165 struct AdapterCtlBlk *acb = 1166 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1167 dprintkl(KERN_INFO, 1168 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n", 1169 cmd, cmd->device->id, (u8)cmd->device->lun, cmd); 1170 1171 if (timer_pending(&acb->waiting_timer)) 1172 del_timer(&acb->waiting_timer); 1173 1174 /* 1175 * disable interrupt 1176 */ 1177 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1178 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1179 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1180 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1181 1182 reset_scsi_bus(acb); 1183 udelay(500); 1184 1185 /* We may be in serious trouble. Wait some seconds */ 1186 acb->last_reset = 1187 jiffies + 3 * HZ / 2 + 1188 HZ * acb->eeprom.delay_time; 1189 1190 /* 1191 * re-enable interrupt 1192 */ 1193 /* Clear SCSI FIFO */ 1194 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1195 clear_fifo(acb, "eh_bus_reset"); 1196 /* Delete pending IRQ */ 1197 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1198 set_basic_config(acb); 1199 1200 reset_dev_param(acb); 1201 doing_srb_done(acb, DID_RESET, cmd, 0); 1202 acb->active_dcb = NULL; 1203 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1204 waiting_process_next(acb); 1205 1206 return SUCCESS; 1207} 1208 1209static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1210{ 1211 int rc; 1212 1213 spin_lock_irq(cmd->device->host->host_lock); 1214 rc = __dc395x_eh_bus_reset(cmd); 1215 spin_unlock_irq(cmd->device->host->host_lock); 1216 1217 return rc; 1218} 1219 1220/* 1221 * abort an errant SCSI command 1222 * @cmd - command to be aborted 1223 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1224 */ 1225static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1226{ 1227 /* 1228 * Look into our command queues: If it has not been sent already, 1229 * we remove it and return success. Otherwise fail. 1230 */ 1231 struct AdapterCtlBlk *acb = 1232 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1233 struct DeviceCtlBlk *dcb; 1234 struct ScsiReqBlk *srb; 1235 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n", 1236 cmd, cmd->device->id, (u8)cmd->device->lun, cmd); 1237 1238 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1239 if (!dcb) { 1240 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1241 return FAILED; 1242 } 1243 1244 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1245 if (srb) { 1246 list_del(&srb->list); 1247 pci_unmap_srb_sense(acb, srb); 1248 pci_unmap_srb(acb, srb); 1249 free_tag(dcb, srb); 1250 list_add_tail(&srb->list, &acb->srb_free_list); 1251 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1252 cmd->result = DID_ABORT << 16; 1253 return SUCCESS; 1254 } 1255 srb = find_cmd(cmd, &dcb->srb_going_list); 1256 if (srb) { 1257 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); 1258 /* XXX: Should abort the command here */ 1259 } else { 1260 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); 1261 } 1262 return FAILED; 1263} 1264 1265 1266/* SDTR */ 1267static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1268 struct ScsiReqBlk *srb) 1269{ 1270 u8 *ptr = srb->msgout_buf + srb->msg_count; 1271 if (srb->msg_count > 1) { 1272 dprintkl(KERN_INFO, 1273 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1274 srb->msg_count, srb->msgout_buf[0], 1275 srb->msgout_buf[1]); 1276 return; 1277 } 1278 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1279 dcb->sync_offset = 0; 1280 dcb->min_nego_period = 200 >> 2; 1281 } else if (dcb->sync_offset == 0) 1282 dcb->sync_offset = SYNC_NEGO_OFFSET; 1283 1284 *ptr++ = MSG_EXTENDED; /* (01h) */ 1285 *ptr++ = 3; /* length */ 1286 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1287 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1288 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1289 srb->msg_count += 5; 1290 srb->state |= SRB_DO_SYNC_NEGO; 1291} 1292 1293 1294/* WDTR */ 1295static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1296 struct ScsiReqBlk *srb) 1297{ 1298 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1299 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1300 u8 *ptr = srb->msgout_buf + srb->msg_count; 1301 if (srb->msg_count > 1) { 1302 dprintkl(KERN_INFO, 1303 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1304 srb->msg_count, srb->msgout_buf[0], 1305 srb->msgout_buf[1]); 1306 return; 1307 } 1308 *ptr++ = MSG_EXTENDED; /* (01h) */ 1309 *ptr++ = 2; /* length */ 1310 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1311 *ptr++ = wide; 1312 srb->msg_count += 4; 1313 srb->state |= SRB_DO_WIDE_NEGO; 1314} 1315 1316 1317#if 0 1318/* Timer to work around chip flaw: When selecting and the bus is 1319 * busy, we sometimes miss a Selection timeout IRQ */ 1320void selection_timeout_missed(unsigned long ptr); 1321/* Sets the timer to wake us up */ 1322static void selto_timer(struct AdapterCtlBlk *acb) 1323{ 1324 if (timer_pending(&acb->selto_timer)) 1325 return; 1326 acb->selto_timer.function = selection_timeout_missed; 1327 acb->selto_timer.data = (unsigned long) acb; 1328 if (time_before 1329 (jiffies + HZ, acb->last_reset + HZ / 2)) 1330 acb->selto_timer.expires = 1331 acb->last_reset + HZ / 2 + 1; 1332 else 1333 acb->selto_timer.expires = jiffies + HZ + 1; 1334 add_timer(&acb->selto_timer); 1335} 1336 1337 1338void selection_timeout_missed(unsigned long ptr) 1339{ 1340 unsigned long flags; 1341 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1342 struct ScsiReqBlk *srb; 1343 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1344 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1345 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1346 return; 1347 } 1348 DC395x_LOCK_IO(acb->scsi_host, flags); 1349 srb = acb->active_dcb->active_srb; 1350 disconnect(acb); 1351 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1352} 1353#endif 1354 1355 1356static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1357 struct ScsiReqBlk* srb) 1358{ 1359 u16 s_stat2, return_code; 1360 u8 s_stat, scsicommand, i, identify_message; 1361 u8 *ptr; 1362 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", 1363 dcb->target_id, dcb->target_lun, srb); 1364 1365 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1366 1367 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1368 s_stat2 = 0; 1369 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1370#if 1 1371 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1372 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n", 1373 s_stat, s_stat2); 1374 /* 1375 * Try anyway? 1376 * 1377 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1378 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed! 1379 * (This is likely to be a bug in the hardware. Obviously, most people 1380 * only have one initiator per SCSI bus.) 1381 * Instead let this fail and have the timer make sure the command is 1382 * tried again after a short time 1383 */ 1384 /*selto_timer (acb); */ 1385 return 1; 1386 } 1387#endif 1388 if (acb->active_dcb) { 1389 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a" 1390 "command while another command (0x%p) is active.", 1391 srb->cmd, 1392 acb->active_dcb->active_srb ? 1393 acb->active_dcb->active_srb->cmd : 0); 1394 return 1; 1395 } 1396 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1397 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); 1398 return 1; 1399 } 1400 /* Allow starting of SCSI commands half a second before we allow the mid-level 1401 * to queue them again after a reset */ 1402 if (time_before(jiffies, acb->last_reset - HZ / 2)) { 1403 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1404 return 1; 1405 } 1406 1407 /* Flush FIFO */ 1408 clear_fifo(acb, "start_scsi"); 1409 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1410 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1411 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1412 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1413 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1414 1415 identify_message = dcb->identify_msg; 1416 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1417 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1418 if (srb->flag & AUTO_REQSENSE) 1419 identify_message &= 0xBF; 1420 1421 if (((srb->cmd->cmnd[0] == INQUIRY) 1422 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1423 || (srb->flag & AUTO_REQSENSE)) 1424 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1425 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1426 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1427 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1428 && (dcb->target_lun == 0)) { 1429 srb->msgout_buf[0] = identify_message; 1430 srb->msg_count = 1; 1431 scsicommand = SCMD_SEL_ATNSTOP; 1432 srb->state = SRB_MSGOUT; 1433#ifndef SYNC_FIRST 1434 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1435 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1436 build_wdtr(acb, dcb, srb); 1437 goto no_cmd; 1438 } 1439#endif 1440 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1441 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1442 build_sdtr(acb, dcb, srb); 1443 goto no_cmd; 1444 } 1445 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1446 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1447 build_wdtr(acb, dcb, srb); 1448 goto no_cmd; 1449 } 1450 srb->msg_count = 0; 1451 } 1452 /* Send identify message */ 1453 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1454 1455 scsicommand = SCMD_SEL_ATN; 1456 srb->state = SRB_START_; 1457#ifndef DC395x_NO_TAGQ 1458 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1459 && (identify_message & 0xC0)) { 1460 /* Send Tag message */ 1461 u32 tag_mask = 1; 1462 u8 tag_number = 0; 1463 while (tag_mask & dcb->tag_mask 1464 && tag_number < dcb->max_command) { 1465 tag_mask = tag_mask << 1; 1466 tag_number++; 1467 } 1468 if (tag_number >= dcb->max_command) { 1469 dprintkl(KERN_WARNING, "start_scsi: (0x%p) " 1470 "Out of tags target=<%02i-%i>)\n", 1471 srb->cmd, srb->cmd->device->id, 1472 (u8)srb->cmd->device->lun); 1473 srb->state = SRB_READY; 1474 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1475 DO_HWRESELECT); 1476 return 1; 1477 } 1478 /* Send Tag id */ 1479 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1480 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1481 dcb->tag_mask |= tag_mask; 1482 srb->tag_number = tag_number; 1483 scsicommand = SCMD_SEL_ATN3; 1484 srb->state = SRB_START_; 1485 } 1486#endif 1487/*polling:*/ 1488 /* Send CDB ..command block ......... */ 1489 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", 1490 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, 1491 srb->cmd->cmnd[0], srb->tag_number); 1492 if (srb->flag & AUTO_REQSENSE) { 1493 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1494 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1495 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1496 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1497 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1498 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1499 } else { 1500 ptr = (u8 *)srb->cmd->cmnd; 1501 for (i = 0; i < srb->cmd->cmd_len; i++) 1502 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1503 } 1504 no_cmd: 1505 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1506 DO_HWRESELECT | DO_DATALATCH); 1507 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1508 /* 1509 * If start_scsi return 1: 1510 * we caught an interrupt (must be reset or reselection ... ) 1511 * : Let's process it first! 1512 */ 1513 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n", 1514 srb->cmd, dcb->target_id, dcb->target_lun); 1515 srb->state = SRB_READY; 1516 free_tag(dcb, srb); 1517 srb->msg_count = 0; 1518 return_code = 1; 1519 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1520 } else { 1521 /* 1522 * If start_scsi returns 0: 1523 * we know that the SCSI processor is free 1524 */ 1525 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1526 dcb->active_srb = srb; 1527 acb->active_dcb = dcb; 1528 return_code = 0; 1529 /* it's important for atn stop */ 1530 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1531 DO_DATALATCH | DO_HWRESELECT); 1532 /* SCSI command */ 1533 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1534 } 1535 return return_code; 1536} 1537 1538 1539#define DC395x_ENABLE_MSGOUT \ 1540 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1541 srb->state |= SRB_MSGOUT 1542 1543 1544/* abort command */ 1545static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1546 struct ScsiReqBlk *srb) 1547{ 1548 srb->msgout_buf[0] = ABORT; 1549 srb->msg_count = 1; 1550 DC395x_ENABLE_MSGOUT; 1551 srb->state &= ~SRB_MSGIN; 1552 srb->state |= SRB_MSGOUT; 1553} 1554 1555 1556/** 1557 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1558 * have been triggered for this card. 1559 * 1560 * @acb: a pointer to the adpter control block 1561 * @scsi_status: the status return when we checked the card 1562 **/ 1563static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1564 u16 scsi_status) 1565{ 1566 struct DeviceCtlBlk *dcb; 1567 struct ScsiReqBlk *srb; 1568 u16 phase; 1569 u8 scsi_intstatus; 1570 unsigned long flags; 1571 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1572 u16 *); 1573 1574 DC395x_LOCK_IO(acb->scsi_host, flags); 1575 1576 /* This acknowledges the IRQ */ 1577 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1578 if ((scsi_status & 0x2007) == 0x2002) 1579 dprintkl(KERN_DEBUG, 1580 "COP after COP completed? %04x\n", scsi_status); 1581 if (debug_enabled(DBG_KG)) { 1582 if (scsi_intstatus & INT_SELTIMEOUT) 1583 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1584 } 1585 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1586 1587 if (timer_pending(&acb->selto_timer)) 1588 del_timer(&acb->selto_timer); 1589 1590 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1591 disconnect(acb); /* bus free interrupt */ 1592 goto out_unlock; 1593 } 1594 if (scsi_intstatus & INT_RESELECTED) { 1595 reselect(acb); 1596 goto out_unlock; 1597 } 1598 if (scsi_intstatus & INT_SELECT) { 1599 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1600 goto out_unlock; 1601 } 1602 if (scsi_intstatus & INT_SCSIRESET) { 1603 scsi_reset_detect(acb); 1604 goto out_unlock; 1605 } 1606 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1607 dcb = acb->active_dcb; 1608 if (!dcb) { 1609 dprintkl(KERN_DEBUG, 1610 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1611 scsi_status, scsi_intstatus); 1612 goto out_unlock; 1613 } 1614 srb = dcb->active_srb; 1615 if (dcb->flag & ABORT_DEV_) { 1616 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1617 enable_msgout_abort(acb, srb); 1618 } 1619 1620 /* software sequential machine */ 1621 phase = (u16)srb->scsi_phase; 1622 1623 /* 1624 * 62037 or 62137 1625 * call dc395x_scsi_phase0[]... "phase entry" 1626 * handle every phase before start transfer 1627 */ 1628 /* data_out_phase0, phase:0 */ 1629 /* data_in_phase0, phase:1 */ 1630 /* command_phase0, phase:2 */ 1631 /* status_phase0, phase:3 */ 1632 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1633 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1634 /* msgout_phase0, phase:6 */ 1635 /* msgin_phase0, phase:7 */ 1636 dc395x_statev = dc395x_scsi_phase0[phase]; 1637 dc395x_statev(acb, srb, &scsi_status); 1638 1639 /* 1640 * if there were any exception occurred scsi_status 1641 * will be modify to bus free phase new scsi_status 1642 * transfer out from ... previous dc395x_statev 1643 */ 1644 srb->scsi_phase = scsi_status & PHASEMASK; 1645 phase = (u16)scsi_status & PHASEMASK; 1646 1647 /* 1648 * call dc395x_scsi_phase1[]... "phase entry" handle 1649 * every phase to do transfer 1650 */ 1651 /* data_out_phase1, phase:0 */ 1652 /* data_in_phase1, phase:1 */ 1653 /* command_phase1, phase:2 */ 1654 /* status_phase1, phase:3 */ 1655 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1656 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1657 /* msgout_phase1, phase:6 */ 1658 /* msgin_phase1, phase:7 */ 1659 dc395x_statev = dc395x_scsi_phase1[phase]; 1660 dc395x_statev(acb, srb, &scsi_status); 1661 } 1662 out_unlock: 1663 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1664} 1665 1666 1667static irqreturn_t dc395x_interrupt(int irq, void *dev_id) 1668{ 1669 struct AdapterCtlBlk *acb = dev_id; 1670 u16 scsi_status; 1671 u8 dma_status; 1672 irqreturn_t handled = IRQ_NONE; 1673 1674 /* 1675 * Check for pending interrupt 1676 */ 1677 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1678 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1679 if (scsi_status & SCSIINTERRUPT) { 1680 /* interrupt pending - let's process it! */ 1681 dc395x_handle_interrupt(acb, scsi_status); 1682 handled = IRQ_HANDLED; 1683 } 1684 else if (dma_status & 0x20) { 1685 /* Error from the DMA engine */ 1686 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1687#if 0 1688 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1689 if (acb->active_dcb) { 1690 acb->active_dcb-> flag |= ABORT_DEV_; 1691 if (acb->active_dcb->active_srb) 1692 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1693 } 1694 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1695#else 1696 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1697 acb = NULL; 1698#endif 1699 handled = IRQ_HANDLED; 1700 } 1701 1702 return handled; 1703} 1704 1705 1706static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1707 u16 *pscsi_status) 1708{ 1709 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd); 1710 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1711 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1712 1713 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1714 srb->state &= ~SRB_MSGOUT; 1715} 1716 1717 1718static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1719 u16 *pscsi_status) 1720{ 1721 u16 i; 1722 u8 *ptr; 1723 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd); 1724 1725 clear_fifo(acb, "msgout_phase1"); 1726 if (!(srb->state & SRB_MSGOUT)) { 1727 srb->state |= SRB_MSGOUT; 1728 dprintkl(KERN_DEBUG, 1729 "msgout_phase1: (0x%p) Phase unexpected\n", 1730 srb->cmd); /* So what ? */ 1731 } 1732 if (!srb->msg_count) { 1733 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", 1734 srb->cmd); 1735 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1736 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1737 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1738 return; 1739 } 1740 ptr = (u8 *)srb->msgout_buf; 1741 for (i = 0; i < srb->msg_count; i++) 1742 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1743 srb->msg_count = 0; 1744 if (srb->msgout_buf[0] == MSG_ABORT) 1745 srb->state = SRB_ABORT_SENT; 1746 1747 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1748} 1749 1750 1751static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1752 u16 *pscsi_status) 1753{ 1754 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd); 1755 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1756} 1757 1758 1759static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1760 u16 *pscsi_status) 1761{ 1762 struct DeviceCtlBlk *dcb; 1763 u8 *ptr; 1764 u16 i; 1765 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd); 1766 1767 clear_fifo(acb, "command_phase1"); 1768 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1769 if (!(srb->flag & AUTO_REQSENSE)) { 1770 ptr = (u8 *)srb->cmd->cmnd; 1771 for (i = 0; i < srb->cmd->cmd_len; i++) { 1772 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1773 ptr++; 1774 } 1775 } else { 1776 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1777 dcb = acb->active_dcb; 1778 /* target id */ 1779 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1780 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1781 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1782 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1783 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1784 } 1785 srb->state |= SRB_COMMAND; 1786 /* it's important for atn stop */ 1787 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1788 /* SCSI command */ 1789 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1790} 1791 1792 1793/* 1794 * Verify that the remaining space in the hw sg lists is the same as 1795 * the count of remaining bytes in srb->total_xfer_length 1796 */ 1797static void sg_verify_length(struct ScsiReqBlk *srb) 1798{ 1799 if (debug_enabled(DBG_SG)) { 1800 unsigned len = 0; 1801 unsigned idx = srb->sg_index; 1802 struct SGentry *psge = srb->segment_x + idx; 1803 for (; idx < srb->sg_count; psge++, idx++) 1804 len += psge->length; 1805 if (len != srb->total_xfer_length) 1806 dprintkdbg(DBG_SG, 1807 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1808 srb->total_xfer_length, len); 1809 } 1810} 1811 1812 1813/* 1814 * Compute the next Scatter Gather list index and adjust its length 1815 * and address if necessary 1816 */ 1817static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1818{ 1819 u8 idx; 1820 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */ 1821 struct SGentry *psge = srb->segment_x + srb->sg_index; 1822 1823 dprintkdbg(DBG_0, 1824 "sg_update_list: Transferred %i of %i bytes, %i remain\n", 1825 xferred, srb->total_xfer_length, left); 1826 if (xferred == 0) { 1827 /* nothing to update since we did not transfer any data */ 1828 return; 1829 } 1830 1831 sg_verify_length(srb); 1832 srb->total_xfer_length = left; /* update remaining count */ 1833 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1834 if (xferred >= psge->length) { 1835 /* Complete SG entries done */ 1836 xferred -= psge->length; 1837 } else { 1838 /* Partial SG entry done */ 1839 dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev, 1840 srb->sg_bus_addr, SEGMENTX_LEN, 1841 DMA_TO_DEVICE); 1842 psge->length -= xferred; 1843 psge->address += xferred; 1844 srb->sg_index = idx; 1845 dma_sync_single_for_device(&srb->dcb->acb->dev->dev, 1846 srb->sg_bus_addr, SEGMENTX_LEN, 1847 DMA_TO_DEVICE); 1848 break; 1849 } 1850 psge++; 1851 } 1852 sg_verify_length(srb); 1853} 1854 1855 1856/* 1857 * We have transferred a single byte (PIO mode?) and need to update 1858 * the count of bytes remaining (total_xfer_length) and update the sg 1859 * entry to either point to next byte in the current sg entry, or of 1860 * already at the end to point to the start of the next sg entry 1861 */ 1862static void sg_subtract_one(struct ScsiReqBlk *srb) 1863{ 1864 sg_update_list(srb, srb->total_xfer_length - 1); 1865} 1866 1867 1868/* 1869 * cleanup_after_transfer 1870 * 1871 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 1872 * KG: Currently called from StatusPhase1 () 1873 * Should probably also be called from other places 1874 * Best might be to call it in DataXXPhase0, if new phase will differ 1875 */ 1876static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 1877 struct ScsiReqBlk *srb) 1878{ 1879 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 1880 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 1881 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 1882 clear_fifo(acb, "cleanup/in"); 1883 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 1884 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1885 } else { /* write */ 1886 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 1887 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1888 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 1889 clear_fifo(acb, "cleanup/out"); 1890 } 1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1892} 1893 1894 1895/* 1896 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO 1897 * Seems to be needed for unknown reasons; could be a hardware bug :-( 1898 */ 1899#define DC395x_LASTPIO 4 1900 1901 1902static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1903 u16 *pscsi_status) 1904{ 1905 struct DeviceCtlBlk *dcb = srb->dcb; 1906 u16 scsi_status = *pscsi_status; 1907 u32 d_left_counter = 0; 1908 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n", 1909 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 1910 1911 /* 1912 * KG: We need to drain the buffers before we draw any conclusions! 1913 * This means telling the DMA to push the rest into SCSI, telling 1914 * SCSI to push the rest to the bus. 1915 * However, the device might have been the one to stop us (phase 1916 * change), and the data in transit just needs to be accounted so 1917 * it can be retransmitted.) 1918 */ 1919 /* 1920 * KG: Stop DMA engine pushing more data into the SCSI FIFO 1921 * If we need more data, the DMA SG list will be freshly set up, anyway 1922 */ 1923 dprintkdbg(DBG_PIO, "data_out_phase0: " 1924 "DMA{fifocnt=0x%02x fifostat=0x%02x} " 1925 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 1926 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1927 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1928 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1929 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 1930 srb->total_xfer_length); 1931 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 1932 1933 if (!(srb->state & SRB_XFERPAD)) { 1934 if (scsi_status & PARITYERROR) 1935 srb->status |= PARITY_ERROR; 1936 1937 /* 1938 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 1939 * is the no of bytes it got from the DMA engine not the no it 1940 * transferred successfully to the device. (And the difference could 1941 * be as much as the FIFO size, I guess ...) 1942 */ 1943 if (!(scsi_status & SCSIXFERDONE)) { 1944 /* 1945 * when data transfer from DMA FIFO to SCSI FIFO 1946 * if there was some data left in SCSI FIFO 1947 */ 1948 d_left_counter = 1949 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 1950 0x1F); 1951 if (dcb->sync_period & WIDE_SYNC) 1952 d_left_counter <<= 1; 1953 1954 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 1955 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 1956 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 1957 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1958 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 1959 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1960 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1961 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1962 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1963 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 1964 } 1965 /* 1966 * calculate all the residue data that not yet tranfered 1967 * SCSI transfer counter + left in SCSI FIFO data 1968 * 1969 * .....TRM_S1040_SCSI_COUNTER (24bits) 1970 * The counter always decrement by one for every SCSI byte transfer. 1971 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 1972 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 1973 */ 1974 if (srb->total_xfer_length > DC395x_LASTPIO) 1975 d_left_counter += 1976 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 1977 1978 /* Is this a good idea? */ 1979 /*clear_fifo(acb, "DOP1"); */ 1980 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 1981 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 1982 && scsi_bufflen(srb->cmd) % 2) { 1983 d_left_counter = 0; 1984 dprintkl(KERN_INFO, 1985 "data_out_phase0: Discard 1 byte (0x%02x)\n", 1986 scsi_status); 1987 } 1988 /* 1989 * KG: Oops again. Same thinko as above: The SCSI might have been 1990 * faster than the DMA engine, so that it ran out of data. 1991 * In that case, we have to do just nothing! 1992 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 1993 */ 1994 /* 1995 * KG: This is nonsense: We have been WRITING data to the bus 1996 * If the SCSI engine has no bytes left, how should the DMA engine? 1997 */ 1998 if (d_left_counter == 0) { 1999 srb->total_xfer_length = 0; 2000 } else { 2001 /* 2002 * if transfer not yet complete 2003 * there were some data residue in SCSI FIFO or 2004 * SCSI transfer counter not empty 2005 */ 2006 long oldxferred = 2007 srb->total_xfer_length - d_left_counter; 2008 const int diff = 2009 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2010 sg_update_list(srb, d_left_counter); 2011 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2012 if ((srb->segment_x[srb->sg_index].length == 2013 diff && scsi_sg_count(srb->cmd)) 2014 || ((oldxferred & ~PAGE_MASK) == 2015 (PAGE_SIZE - diff)) 2016 ) { 2017 dprintkl(KERN_INFO, "data_out_phase0: " 2018 "Work around chip bug (%i)?\n", diff); 2019 d_left_counter = 2020 srb->total_xfer_length - diff; 2021 sg_update_list(srb, d_left_counter); 2022 /*srb->total_xfer_length -= diff; */ 2023 /*srb->virt_addr += diff; */ 2024 /*if (srb->cmd->use_sg) */ 2025 /* srb->sg_index++; */ 2026 } 2027 } 2028 } 2029 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2030 cleanup_after_transfer(acb, srb); 2031 } 2032} 2033 2034 2035static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2036 u16 *pscsi_status) 2037{ 2038 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n", 2039 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2040 clear_fifo(acb, "data_out_phase1"); 2041 /* do prepare before transfer when data out phase */ 2042 data_io_transfer(acb, srb, XFERDATAOUT); 2043} 2044 2045static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2046 u16 *pscsi_status) 2047{ 2048 u16 scsi_status = *pscsi_status; 2049 2050 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n", 2051 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2052 2053 /* 2054 * KG: DataIn is much more tricky than DataOut. When the device is finished 2055 * and switches to another phase, the SCSI engine should be finished too. 2056 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2057 * engine and transferred to memory. 2058 * We should wait for the FIFOs to be emptied by that (is there any way to 2059 * enforce this?) and then stop the DMA engine, because it might think, that 2060 * there are more bytes to follow. Yes, the device might disconnect prior to 2061 * having all bytes transferred! 2062 * Also we should make sure that all data from the DMA engine buffer's really 2063 * made its way to the system memory! Some documentation on this would not 2064 * seem to be a bad idea, actually. 2065 */ 2066 if (!(srb->state & SRB_XFERPAD)) { 2067 u32 d_left_counter; 2068 unsigned int sc, fc; 2069 2070 if (scsi_status & PARITYERROR) { 2071 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) " 2072 "Parity Error\n", srb->cmd); 2073 srb->status |= PARITY_ERROR; 2074 } 2075 /* 2076 * KG: We should wait for the DMA FIFO to be empty ... 2077 * but: it would be better to wait first for the SCSI FIFO and then the 2078 * the DMA FIFO to become empty? How do we know, that the device not already 2079 * sent data to the FIFO in a MsgIn phase, eg.? 2080 */ 2081 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2082#if 0 2083 int ctr = 6000000; 2084 dprintkl(KERN_DEBUG, 2085 "DIP0: Wait for DMA FIFO to flush ...\n"); 2086 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2087 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2088 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2089 while (! 2090 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2091 0x80) && --ctr); 2092 if (ctr < 6000000 - 1) 2093 dprintkl(KERN_DEBUG 2094 "DIP0: Had to wait for DMA ...\n"); 2095 if (!ctr) 2096 dprintkl(KERN_ERR, 2097 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2098 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2099#endif 2100 dprintkdbg(DBG_KG, "data_in_phase0: " 2101 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2102 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2103 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2104 } 2105 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2106 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2107 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2108 d_left_counter = sc + ((fc & 0x1f) 2109 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2110 0)); 2111 dprintkdbg(DBG_KG, "data_in_phase0: " 2112 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2113 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2114 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2115 fc, 2116 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2117 sc, 2118 fc, 2119 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2120 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2121 srb->total_xfer_length, d_left_counter); 2122#if DC395x_LASTPIO 2123 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */ 2124 if (d_left_counter 2125 && srb->total_xfer_length <= DC395x_LASTPIO) { 2126 size_t left_io = srb->total_xfer_length; 2127 2128 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2129 /*sg_update_list (srb, d_left_counter); */ 2130 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " 2131 "for remaining %i bytes:", 2132 fc & 0x1f, 2133 (srb->dcb->sync_period & WIDE_SYNC) ? 2134 "words" : "bytes", 2135 srb->total_xfer_length); 2136 if (srb->dcb->sync_period & WIDE_SYNC) 2137 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2138 CFG2_WIDEFIFO); 2139 while (left_io) { 2140 unsigned char *virt, *base = NULL; 2141 unsigned long flags = 0; 2142 size_t len = left_io; 2143 size_t offset = srb->request_length - left_io; 2144 2145 local_irq_save(flags); 2146 /* Assumption: it's inside one page as it's at most 4 bytes and 2147 I just assume it's on a 4-byte boundary */ 2148 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2149 srb->sg_count, &offset, &len); 2150 virt = base + offset; 2151 2152 left_io -= len; 2153 2154 while (len) { 2155 u8 byte; 2156 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2157 *virt++ = byte; 2158 2159 if (debug_enabled(DBG_PIO)) 2160 printk(" %02x", byte); 2161 2162 d_left_counter--; 2163 sg_subtract_one(srb); 2164 2165 len--; 2166 2167 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2168 2169 if (fc == 0x40) { 2170 left_io = 0; 2171 break; 2172 } 2173 } 2174 2175 WARN_ON((fc != 0x40) == !d_left_counter); 2176 2177 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { 2178 /* Read the last byte ... */ 2179 if (srb->total_xfer_length > 0) { 2180 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2181 2182 *virt++ = byte; 2183 srb->total_xfer_length--; 2184 if (debug_enabled(DBG_PIO)) 2185 printk(" %02x", byte); 2186 } 2187 2188 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2189 } 2190 2191 scsi_kunmap_atomic_sg(base); 2192 local_irq_restore(flags); 2193 } 2194 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2195 /*srb->total_xfer_length = 0; */ 2196 if (debug_enabled(DBG_PIO)) 2197 printk("\n"); 2198 } 2199#endif /* DC395x_LASTPIO */ 2200 2201#if 0 2202 /* 2203 * KG: This was in DATAOUT. Does it also belong here? 2204 * Nobody seems to know what counter and fifo_cnt count exactly ... 2205 */ 2206 if (!(scsi_status & SCSIXFERDONE)) { 2207 /* 2208 * when data transfer from DMA FIFO to SCSI FIFO 2209 * if there was some data left in SCSI FIFO 2210 */ 2211 d_left_counter = 2212 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2213 0x1F); 2214 if (srb->dcb->sync_period & WIDE_SYNC) 2215 d_left_counter <<= 1; 2216 /* 2217 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2218 * so need to *= 2 2219 * KG: Seems to be correct ... 2220 */ 2221 } 2222#endif 2223 /* KG: This should not be needed any more! */ 2224 if (d_left_counter == 0 2225 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2226#if 0 2227 int ctr = 6000000; 2228 u8 TempDMAstatus; 2229 do { 2230 TempDMAstatus = 2231 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2232 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2233 if (!ctr) 2234 dprintkl(KERN_ERR, 2235 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2236 srb->total_xfer_length = 0; 2237#endif 2238 srb->total_xfer_length = d_left_counter; 2239 } else { /* phase changed */ 2240 /* 2241 * parsing the case: 2242 * when a transfer not yet complete 2243 * but be disconnected by target 2244 * if transfer not yet complete 2245 * there were some data residue in SCSI FIFO or 2246 * SCSI transfer counter not empty 2247 */ 2248 sg_update_list(srb, d_left_counter); 2249 } 2250 } 2251 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2252 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2253 cleanup_after_transfer(acb, srb); 2254 } 2255} 2256 2257 2258static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2259 u16 *pscsi_status) 2260{ 2261 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n", 2262 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2263 data_io_transfer(acb, srb, XFERDATAIN); 2264} 2265 2266 2267static void data_io_transfer(struct AdapterCtlBlk *acb, 2268 struct ScsiReqBlk *srb, u16 io_dir) 2269{ 2270 struct DeviceCtlBlk *dcb = srb->dcb; 2271 u8 bval; 2272 dprintkdbg(DBG_0, 2273 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2274 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, 2275 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2276 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2277 if (srb == acb->tmp_srb) 2278 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2279 if (srb->sg_index >= srb->sg_count) { 2280 /* can't happen? out of bounds error */ 2281 return; 2282 } 2283 2284 if (srb->total_xfer_length > DC395x_LASTPIO) { 2285 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2286 /* 2287 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2288 * Maybe, even ABORTXFER would be appropriate 2289 */ 2290 if (dma_status & XFERPENDING) { 2291 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2292 "Expect trouble!\n"); 2293 dump_register_info(acb, dcb, srb); 2294 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2295 } 2296 /* clear_fifo(acb, "IO"); */ 2297 /* 2298 * load what physical address of Scatter/Gather list table 2299 * want to be transfer 2300 */ 2301 srb->state |= SRB_DATA_XFER; 2302 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2303 if (scsi_sg_count(srb->cmd)) { /* with S/G */ 2304 io_dir |= DMACMD_SG; 2305 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2306 srb->sg_bus_addr + 2307 sizeof(struct SGentry) * 2308 srb->sg_index); 2309 /* load how many bytes in the sg list table */ 2310 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2311 ((u32)(srb->sg_count - 2312 srb->sg_index) << 3)); 2313 } else { /* without S/G */ 2314 io_dir &= ~DMACMD_SG; 2315 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2316 srb->segment_x[0].address); 2317 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2318 srb->segment_x[0].length); 2319 } 2320 /* load total transfer length (24bits) max value 16Mbyte */ 2321 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2322 srb->total_xfer_length); 2323 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2324 if (io_dir & DMACMD_DIR) { /* read */ 2325 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2326 SCMD_DMA_IN); 2327 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2328 } else { 2329 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2330 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2331 SCMD_DMA_OUT); 2332 } 2333 2334 } 2335#if DC395x_LASTPIO 2336 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2337 /* 2338 * load what physical address of Scatter/Gather list table 2339 * want to be transfer 2340 */ 2341 srb->state |= SRB_DATA_XFER; 2342 /* load total transfer length (24bits) max value 16Mbyte */ 2343 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2344 srb->total_xfer_length); 2345 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2346 if (io_dir & DMACMD_DIR) { /* read */ 2347 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2348 SCMD_FIFO_IN); 2349 } else { /* write */ 2350 int ln = srb->total_xfer_length; 2351 size_t left_io = srb->total_xfer_length; 2352 2353 if (srb->dcb->sync_period & WIDE_SYNC) 2354 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2355 CFG2_WIDEFIFO); 2356 2357 while (left_io) { 2358 unsigned char *virt, *base = NULL; 2359 unsigned long flags = 0; 2360 size_t len = left_io; 2361 size_t offset = srb->request_length - left_io; 2362 2363 local_irq_save(flags); 2364 /* Again, max 4 bytes */ 2365 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2366 srb->sg_count, &offset, &len); 2367 virt = base + offset; 2368 2369 left_io -= len; 2370 2371 while (len--) { 2372 if (debug_enabled(DBG_PIO)) 2373 printk(" %02x", *virt); 2374 2375 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); 2376 2377 sg_subtract_one(srb); 2378 } 2379 2380 scsi_kunmap_atomic_sg(base); 2381 local_irq_restore(flags); 2382 } 2383 if (srb->dcb->sync_period & WIDE_SYNC) { 2384 if (ln % 2) { 2385 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2386 if (debug_enabled(DBG_PIO)) 2387 printk(" |00"); 2388 } 2389 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2390 } 2391 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2392 if (debug_enabled(DBG_PIO)) 2393 printk("\n"); 2394 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2395 SCMD_FIFO_OUT); 2396 } 2397 } 2398#endif /* DC395x_LASTPIO */ 2399 else { /* xfer pad */ 2400 u8 data = 0, data2 = 0; 2401 if (srb->sg_count) { 2402 srb->adapter_status = H_OVER_UNDER_RUN; 2403 srb->status |= OVER_RUN; 2404 } 2405 /* 2406 * KG: despite the fact that we are using 16 bits I/O ops 2407 * the SCSI FIFO is only 8 bits according to the docs 2408 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2409 */ 2410 if (dcb->sync_period & WIDE_SYNC) { 2411 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2412 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2413 CFG2_WIDEFIFO); 2414 if (io_dir & DMACMD_DIR) { 2415 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2416 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2417 } else { 2418 /* Danger, Robinson: If you find KGs 2419 * scattered over the wide disk, the driver 2420 * or chip is to blame :-( */ 2421 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2422 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2423 } 2424 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2425 } else { 2426 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2427 /* Danger, Robinson: If you find a collection of Ks on your disk 2428 * something broke :-( */ 2429 if (io_dir & DMACMD_DIR) 2430 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2431 else 2432 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2433 } 2434 srb->state |= SRB_XFERPAD; 2435 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2436 /* SCSI command */ 2437 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2438 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2439 } 2440} 2441 2442 2443static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2444 u16 *pscsi_status) 2445{ 2446 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n", 2447 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2448 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2449 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2450 srb->state = SRB_COMPLETED; 2451 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2452 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2453 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2454} 2455 2456 2457static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2458 u16 *pscsi_status) 2459{ 2460 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n", 2461 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2462 srb->state = SRB_STATUS; 2463 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2464 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2465} 2466 2467 2468/* Check if the message is complete */ 2469static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2470{ 2471 if (*msgbuf == EXTENDED_MESSAGE) { 2472 if (len < 2) 2473 return 0; 2474 if (len < msgbuf[1] + 2) 2475 return 0; 2476 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2477 if (len < 2) 2478 return 0; 2479 return 1; 2480} 2481 2482/* reject_msg */ 2483static inline void msgin_reject(struct AdapterCtlBlk *acb, 2484 struct ScsiReqBlk *srb) 2485{ 2486 srb->msgout_buf[0] = MESSAGE_REJECT; 2487 srb->msg_count = 1; 2488 DC395x_ENABLE_MSGOUT; 2489 srb->state &= ~SRB_MSGIN; 2490 srb->state |= SRB_MSGOUT; 2491 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2492 srb->msgin_buf[0], 2493 srb->dcb->target_id, srb->dcb->target_lun); 2494} 2495 2496 2497static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2498 struct DeviceCtlBlk *dcb, u8 tag) 2499{ 2500 struct ScsiReqBlk *srb = NULL; 2501 struct ScsiReqBlk *i; 2502 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n", 2503 srb->cmd, tag, srb); 2504 2505 if (!(dcb->tag_mask & (1 << tag))) 2506 dprintkl(KERN_DEBUG, 2507 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2508 dcb->tag_mask, tag); 2509 2510 if (list_empty(&dcb->srb_going_list)) 2511 goto mingx0; 2512 list_for_each_entry(i, &dcb->srb_going_list, list) { 2513 if (i->tag_number == tag) { 2514 srb = i; 2515 break; 2516 } 2517 } 2518 if (!srb) 2519 goto mingx0; 2520 2521 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n", 2522 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun); 2523 if (dcb->flag & ABORT_DEV_) { 2524 /*srb->state = SRB_ABORT_SENT; */ 2525 enable_msgout_abort(acb, srb); 2526 } 2527 2528 if (!(srb->state & SRB_DISCONNECT)) 2529 goto mingx0; 2530 2531 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2532 srb->state |= dcb->active_srb->state; 2533 srb->state |= SRB_DATA_XFER; 2534 dcb->active_srb = srb; 2535 /* How can we make the DORS happy? */ 2536 return srb; 2537 2538 mingx0: 2539 srb = acb->tmp_srb; 2540 srb->state = SRB_UNEXPECT_RESEL; 2541 dcb->active_srb = srb; 2542 srb->msgout_buf[0] = MSG_ABORT_TAG; 2543 srb->msg_count = 1; 2544 DC395x_ENABLE_MSGOUT; 2545 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2546 return srb; 2547} 2548 2549 2550static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2551 struct DeviceCtlBlk *dcb) 2552{ 2553 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2554 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2555 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2556 set_xfer_rate(acb, dcb); 2557} 2558 2559 2560/* set async transfer mode */ 2561static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2562{ 2563 struct DeviceCtlBlk *dcb = srb->dcb; 2564 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2565 dcb->target_id, dcb->target_lun); 2566 2567 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2568 dcb->sync_mode |= SYNC_NEGO_DONE; 2569 /*dcb->sync_period &= 0; */ 2570 dcb->sync_offset = 0; 2571 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2572 srb->state &= ~SRB_DO_SYNC_NEGO; 2573 reprogram_regs(acb, dcb); 2574 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2575 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2576 build_wdtr(acb, dcb, srb); 2577 DC395x_ENABLE_MSGOUT; 2578 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2579 } 2580} 2581 2582 2583/* set sync transfer mode */ 2584static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2585{ 2586 struct DeviceCtlBlk *dcb = srb->dcb; 2587 u8 bval; 2588 int fact; 2589 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2590 "(%02i.%01i MHz) Offset %i\n", 2591 dcb->target_id, srb->msgin_buf[3] << 2, 2592 (250 / srb->msgin_buf[3]), 2593 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2594 srb->msgin_buf[4]); 2595 2596 if (srb->msgin_buf[4] > 15) 2597 srb->msgin_buf[4] = 15; 2598 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2599 dcb->sync_offset = 0; 2600 else if (dcb->sync_offset == 0) 2601 dcb->sync_offset = srb->msgin_buf[4]; 2602 if (srb->msgin_buf[4] > dcb->sync_offset) 2603 srb->msgin_buf[4] = dcb->sync_offset; 2604 else 2605 dcb->sync_offset = srb->msgin_buf[4]; 2606 bval = 0; 2607 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2608 || dcb->min_nego_period > 2609 clock_period[bval])) 2610 bval++; 2611 if (srb->msgin_buf[3] < clock_period[bval]) 2612 dprintkl(KERN_INFO, 2613 "msgin_set_sync: Increase sync nego period to %ins\n", 2614 clock_period[bval] << 2); 2615 srb->msgin_buf[3] = clock_period[bval]; 2616 dcb->sync_period &= 0xf0; 2617 dcb->sync_period |= ALT_SYNC | bval; 2618 dcb->min_nego_period = srb->msgin_buf[3]; 2619 2620 if (dcb->sync_period & WIDE_SYNC) 2621 fact = 500; 2622 else 2623 fact = 250; 2624 2625 dprintkl(KERN_INFO, 2626 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2627 dcb->target_id, (fact == 500) ? "Wide16" : "", 2628 dcb->min_nego_period << 2, dcb->sync_offset, 2629 (fact / dcb->min_nego_period), 2630 ((fact % dcb->min_nego_period) * 10 + 2631 dcb->min_nego_period / 2) / dcb->min_nego_period); 2632 2633 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2634 /* Reply with corrected SDTR Message */ 2635 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2636 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2637 2638 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2639 srb->msg_count = 5; 2640 DC395x_ENABLE_MSGOUT; 2641 dcb->sync_mode |= SYNC_NEGO_DONE; 2642 } else { 2643 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2644 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2645 build_wdtr(acb, dcb, srb); 2646 DC395x_ENABLE_MSGOUT; 2647 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2648 } 2649 } 2650 srb->state &= ~SRB_DO_SYNC_NEGO; 2651 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2652 2653 reprogram_regs(acb, dcb); 2654} 2655 2656 2657static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2658 struct ScsiReqBlk *srb) 2659{ 2660 struct DeviceCtlBlk *dcb = srb->dcb; 2661 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2662 2663 dcb->sync_period &= ~WIDE_SYNC; 2664 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2665 dcb->sync_mode |= WIDE_NEGO_DONE; 2666 srb->state &= ~SRB_DO_WIDE_NEGO; 2667 reprogram_regs(acb, dcb); 2668 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2669 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2670 build_sdtr(acb, dcb, srb); 2671 DC395x_ENABLE_MSGOUT; 2672 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2673 } 2674} 2675 2676static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2677{ 2678 struct DeviceCtlBlk *dcb = srb->dcb; 2679 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2680 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2681 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2682 2683 if (srb->msgin_buf[3] > wide) 2684 srb->msgin_buf[3] = wide; 2685 /* Completed */ 2686 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2687 dprintkl(KERN_DEBUG, 2688 "msgin_set_wide: Wide nego initiated <%02i>\n", 2689 dcb->target_id); 2690 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2691 srb->msg_count = 4; 2692 srb->state |= SRB_DO_WIDE_NEGO; 2693 DC395x_ENABLE_MSGOUT; 2694 } 2695 2696 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2697 if (srb->msgin_buf[3] > 0) 2698 dcb->sync_period |= WIDE_SYNC; 2699 else 2700 dcb->sync_period &= ~WIDE_SYNC; 2701 srb->state &= ~SRB_DO_WIDE_NEGO; 2702 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2703 dprintkdbg(DBG_1, 2704 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2705 (8 << srb->msgin_buf[3]), dcb->target_id); 2706 reprogram_regs(acb, dcb); 2707 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2708 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2709 build_sdtr(acb, dcb, srb); 2710 DC395x_ENABLE_MSGOUT; 2711 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2712 } 2713} 2714 2715 2716/* 2717 * extended message codes: 2718 * 2719 * code description 2720 * 2721 * 02h Reserved 2722 * 00h MODIFY DATA POINTER 2723 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2724 * 03h WIDE DATA TRANSFER REQUEST 2725 * 04h - 7Fh Reserved 2726 * 80h - FFh Vendor specific 2727 */ 2728static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2729 u16 *pscsi_status) 2730{ 2731 struct DeviceCtlBlk *dcb = acb->active_dcb; 2732 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd); 2733 2734 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2735 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2736 /* Now eval the msg */ 2737 switch (srb->msgin_buf[0]) { 2738 case DISCONNECT: 2739 srb->state = SRB_DISCONNECT; 2740 break; 2741 2742 case SIMPLE_QUEUE_TAG: 2743 case HEAD_OF_QUEUE_TAG: 2744 case ORDERED_QUEUE_TAG: 2745 srb = 2746 msgin_qtag(acb, dcb, 2747 srb->msgin_buf[1]); 2748 break; 2749 2750 case MESSAGE_REJECT: 2751 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2752 DO_CLRATN | DO_DATALATCH); 2753 /* A sync nego message was rejected ! */ 2754 if (srb->state & SRB_DO_SYNC_NEGO) { 2755 msgin_set_async(acb, srb); 2756 break; 2757 } 2758 /* A wide nego message was rejected ! */ 2759 if (srb->state & SRB_DO_WIDE_NEGO) { 2760 msgin_set_nowide(acb, srb); 2761 break; 2762 } 2763 enable_msgout_abort(acb, srb); 2764 /*srb->state |= SRB_ABORT_SENT */ 2765 break; 2766 2767 case EXTENDED_MESSAGE: 2768 /* SDTR */ 2769 if (srb->msgin_buf[1] == 3 2770 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2771 msgin_set_sync(acb, srb); 2772 break; 2773 } 2774 /* WDTR */ 2775 if (srb->msgin_buf[1] == 2 2776 && srb->msgin_buf[2] == EXTENDED_WDTR 2777 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2778 msgin_set_wide(acb, srb); 2779 break; 2780 } 2781 msgin_reject(acb, srb); 2782 break; 2783 2784 case MSG_IGNOREWIDE: 2785 /* Discard wide residual */ 2786 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2787 break; 2788 2789 case COMMAND_COMPLETE: 2790 /* nothing has to be done */ 2791 break; 2792 2793 case SAVE_POINTERS: 2794 /* 2795 * SAVE POINTER may be ignored as we have the struct 2796 * ScsiReqBlk* associated with the scsi command. 2797 */ 2798 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2799 "SAVE POINTER rem=%i Ignore\n", 2800 srb->cmd, srb->total_xfer_length); 2801 break; 2802 2803 case RESTORE_POINTERS: 2804 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2805 break; 2806 2807 case ABORT: 2808 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2809 "<%02i-%i> ABORT msg\n", 2810 srb->cmd, dcb->target_id, 2811 dcb->target_lun); 2812 dcb->flag |= ABORT_DEV_; 2813 enable_msgout_abort(acb, srb); 2814 break; 2815 2816 default: 2817 /* reject unknown messages */ 2818 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2819 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2820 srb->msg_count = 1; 2821 srb->msgout_buf[0] = dcb->identify_msg; 2822 DC395x_ENABLE_MSGOUT; 2823 srb->state |= SRB_MSGOUT; 2824 /*break; */ 2825 } 2826 msgin_reject(acb, srb); 2827 } 2828 2829 /* Clear counter and MsgIn state */ 2830 srb->state &= ~SRB_MSGIN; 2831 acb->msg_len = 0; 2832 } 2833 *pscsi_status = PH_BUS_FREE; 2834 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2835 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2836} 2837 2838 2839static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2840 u16 *pscsi_status) 2841{ 2842 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd); 2843 clear_fifo(acb, "msgin_phase1"); 2844 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2845 if (!(srb->state & SRB_MSGIN)) { 2846 srb->state &= ~SRB_DISCONNECT; 2847 srb->state |= SRB_MSGIN; 2848 } 2849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2850 /* SCSI command */ 2851 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2852} 2853 2854 2855static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2856 u16 *pscsi_status) 2857{ 2858} 2859 2860 2861static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2862 u16 *pscsi_status) 2863{ 2864} 2865 2866 2867static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 2868{ 2869 struct DeviceCtlBlk *i; 2870 2871 /* set all lun device's period, offset */ 2872 if (dcb->identify_msg & 0x07) 2873 return; 2874 2875 if (acb->scan_devices) { 2876 current_sync_offset = dcb->sync_offset; 2877 return; 2878 } 2879 2880 list_for_each_entry(i, &acb->dcb_list, list) 2881 if (i->target_id == dcb->target_id) { 2882 i->sync_period = dcb->sync_period; 2883 i->sync_offset = dcb->sync_offset; 2884 i->sync_mode = dcb->sync_mode; 2885 i->min_nego_period = dcb->min_nego_period; 2886 } 2887} 2888 2889 2890static void disconnect(struct AdapterCtlBlk *acb) 2891{ 2892 struct DeviceCtlBlk *dcb = acb->active_dcb; 2893 struct ScsiReqBlk *srb; 2894 2895 if (!dcb) { 2896 dprintkl(KERN_ERR, "disconnect: No such device\n"); 2897 udelay(500); 2898 /* Suspend queue for a while */ 2899 acb->last_reset = 2900 jiffies + HZ / 2 + 2901 HZ * acb->eeprom.delay_time; 2902 clear_fifo(acb, "disconnectEx"); 2903 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 2904 return; 2905 } 2906 srb = dcb->active_srb; 2907 acb->active_dcb = NULL; 2908 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd); 2909 2910 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 2911 clear_fifo(acb, "disconnect"); 2912 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 2913 if (srb->state & SRB_UNEXPECT_RESEL) { 2914 dprintkl(KERN_ERR, 2915 "disconnect: Unexpected reselection <%02i-%i>\n", 2916 dcb->target_id, dcb->target_lun); 2917 srb->state = 0; 2918 waiting_process_next(acb); 2919 } else if (srb->state & SRB_ABORT_SENT) { 2920 dcb->flag &= ~ABORT_DEV_; 2921 acb->last_reset = jiffies + HZ / 2 + 1; 2922 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 2923 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 2924 waiting_process_next(acb); 2925 } else { 2926 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 2927 || !(srb-> 2928 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 2929 /* 2930 * Selection time out 2931 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 2932 */ 2933 /* Unexp. Disc / Sel Timeout */ 2934 if (srb->state != SRB_START_ 2935 && srb->state != SRB_MSGOUT) { 2936 srb->state = SRB_READY; 2937 dprintkl(KERN_DEBUG, 2938 "disconnect: (0x%p) Unexpected\n", 2939 srb->cmd); 2940 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 2941 goto disc1; 2942 } else { 2943 /* Normal selection timeout */ 2944 dprintkdbg(DBG_KG, "disconnect: (0x%p) " 2945 "<%02i-%i> SelTO\n", srb->cmd, 2946 dcb->target_id, dcb->target_lun); 2947 if (srb->retry_count++ > DC395x_MAX_RETRIES 2948 || acb->scan_devices) { 2949 srb->target_status = 2950 SCSI_STAT_SEL_TIMEOUT; 2951 goto disc1; 2952 } 2953 free_tag(dcb, srb); 2954 list_move(&srb->list, &dcb->srb_waiting_list); 2955 dprintkdbg(DBG_KG, 2956 "disconnect: (0x%p) Retry\n", 2957 srb->cmd); 2958 waiting_set_timer(acb, HZ / 20); 2959 } 2960 } else if (srb->state & SRB_DISCONNECT) { 2961 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 2962 /* 2963 * SRB_DISCONNECT (This is what we expect!) 2964 */ 2965 if (bval & 0x40) { 2966 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 2967 " 0x%02x: ACK set! Other controllers?\n", 2968 bval); 2969 /* It could come from another initiator, therefore don't do much ! */ 2970 } else 2971 waiting_process_next(acb); 2972 } else if (srb->state & SRB_COMPLETED) { 2973 disc1: 2974 /* 2975 ** SRB_COMPLETED 2976 */ 2977 free_tag(dcb, srb); 2978 dcb->active_srb = NULL; 2979 srb->state = SRB_FREE; 2980 srb_done(acb, dcb, srb); 2981 } 2982 } 2983} 2984 2985 2986static void reselect(struct AdapterCtlBlk *acb) 2987{ 2988 struct DeviceCtlBlk *dcb = acb->active_dcb; 2989 struct ScsiReqBlk *srb = NULL; 2990 u16 rsel_tar_lun_id; 2991 u8 id, lun; 2992 u8 arblostflag = 0; 2993 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 2994 2995 clear_fifo(acb, "reselect"); 2996 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 2997 /* Read Reselected Target ID and LUN */ 2998 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 2999 if (dcb) { /* Arbitration lost but Reselection win */ 3000 srb = dcb->active_srb; 3001 if (!srb) { 3002 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3003 "but active_srb == NULL\n"); 3004 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3005 return; 3006 } 3007 /* Why the if ? */ 3008 if (!acb->scan_devices) { 3009 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> " 3010 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3011 srb->cmd, dcb->target_id, 3012 dcb->target_lun, rsel_tar_lun_id, 3013 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3014 arblostflag = 1; 3015 /*srb->state |= SRB_DISCONNECT; */ 3016 3017 srb->state = SRB_READY; 3018 free_tag(dcb, srb); 3019 list_move(&srb->list, &dcb->srb_waiting_list); 3020 waiting_set_timer(acb, HZ / 20); 3021 3022 /* return; */ 3023 } 3024 } 3025 /* Read Reselected Target Id and LUN */ 3026 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3027 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3028 "Got %i!\n", rsel_tar_lun_id); 3029 id = rsel_tar_lun_id & 0xff; 3030 lun = (rsel_tar_lun_id >> 8) & 7; 3031 dcb = find_dcb(acb, id, lun); 3032 if (!dcb) { 3033 dprintkl(KERN_ERR, "reselect: From non existent device " 3034 "<%02i-%i>\n", id, lun); 3035 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3036 return; 3037 } 3038 acb->active_dcb = dcb; 3039 3040 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3041 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3042 "disconnection? <%02i-%i>\n", 3043 dcb->target_id, dcb->target_lun); 3044 3045 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3046 srb = acb->tmp_srb; 3047 dcb->active_srb = srb; 3048 } else { 3049 /* There can be only one! */ 3050 srb = dcb->active_srb; 3051 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3052 /* 3053 * abort command 3054 */ 3055 dprintkl(KERN_DEBUG, 3056 "reselect: w/o disconnected cmds <%02i-%i>\n", 3057 dcb->target_id, dcb->target_lun); 3058 srb = acb->tmp_srb; 3059 srb->state = SRB_UNEXPECT_RESEL; 3060 dcb->active_srb = srb; 3061 enable_msgout_abort(acb, srb); 3062 } else { 3063 if (dcb->flag & ABORT_DEV_) { 3064 /*srb->state = SRB_ABORT_SENT; */ 3065 enable_msgout_abort(acb, srb); 3066 } else 3067 srb->state = SRB_DATA_XFER; 3068 3069 } 3070 } 3071 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3072 3073 /* Program HA ID, target ID, period and offset */ 3074 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3075 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3076 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3077 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3078 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3079 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3080 /* SCSI command */ 3081 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3082} 3083 3084 3085static inline u8 tagq_blacklist(char *name) 3086{ 3087#ifndef DC395x_NO_TAGQ 3088#if 0 3089 u8 i; 3090 for (i = 0; i < BADDEVCNT; i++) 3091 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3092 return 1; 3093#endif 3094 return 0; 3095#else 3096 return 1; 3097#endif 3098} 3099 3100 3101static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3102{ 3103 /* Check for SCSI format (ANSI and Response data format) */ 3104 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3105 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3106 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3107 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3108 /* ((dcb->dev_type == TYPE_DISK) 3109 || (dcb->dev_type == TYPE_MOD)) && */ 3110 !tagq_blacklist(((char *)ptr) + 8)) { 3111 if (dcb->max_command == 1) 3112 dcb->max_command = 3113 dcb->acb->tag_max_num; 3114 dcb->sync_mode |= EN_TAG_QUEUEING; 3115 /*dcb->tag_mask = 0; */ 3116 } else 3117 dcb->max_command = 1; 3118 } 3119} 3120 3121 3122static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3123 struct ScsiInqData *ptr) 3124{ 3125 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3126 dcb->dev_type = bval1; 3127 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3128 disc_tagq_set(dcb, ptr); 3129} 3130 3131 3132/* unmap mapped pci regions from SRB */ 3133static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3134{ 3135 struct scsi_cmnd *cmd = srb->cmd; 3136 enum dma_data_direction dir = cmd->sc_data_direction; 3137 3138 if (scsi_sg_count(cmd) && dir != DMA_NONE) { 3139 /* unmap DC395x SG list */ 3140 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3141 srb->sg_bus_addr, SEGMENTX_LEN); 3142 dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN, 3143 DMA_TO_DEVICE); 3144 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3145 scsi_sg_count(cmd), scsi_bufflen(cmd)); 3146 /* unmap the sg segments */ 3147 scsi_dma_unmap(cmd); 3148 } 3149} 3150 3151 3152/* unmap mapped pci sense buffer from SRB */ 3153static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3154 struct ScsiReqBlk *srb) 3155{ 3156 if (!(srb->flag & AUTO_REQSENSE)) 3157 return; 3158 /* Unmap sense buffer */ 3159 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3160 srb->segment_x[0].address); 3161 dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address, 3162 srb->segment_x[0].length, DMA_FROM_DEVICE); 3163 /* Restore SG stuff */ 3164 srb->total_xfer_length = srb->xferred; 3165 srb->segment_x[0].address = 3166 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3167 srb->segment_x[0].length = 3168 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3169} 3170 3171 3172/* 3173 * Complete execution of a SCSI command 3174 * Signal completion to the generic SCSI driver 3175 */ 3176static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3177 struct ScsiReqBlk *srb) 3178{ 3179 u8 tempcnt, status; 3180 struct scsi_cmnd *cmd = srb->cmd; 3181 enum dma_data_direction dir = cmd->sc_data_direction; 3182 int ckc_only = 1; 3183 3184 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd, 3185 srb->cmd->device->id, (u8)srb->cmd->device->lun); 3186 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", 3187 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, 3188 scsi_sgtalbe(cmd)); 3189 status = srb->target_status; 3190 if (srb->flag & AUTO_REQSENSE) { 3191 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3192 pci_unmap_srb_sense(acb, srb); 3193 /* 3194 ** target status.......................... 3195 */ 3196 srb->flag &= ~AUTO_REQSENSE; 3197 srb->adapter_status = 0; 3198 srb->target_status = CHECK_CONDITION << 1; 3199 if (debug_enabled(DBG_1)) { 3200 switch (cmd->sense_buffer[2] & 0x0f) { 3201 case NOT_READY: 3202 dprintkl(KERN_DEBUG, 3203 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3204 cmd->cmnd[0], dcb->target_id, 3205 dcb->target_lun, status, acb->scan_devices); 3206 break; 3207 case UNIT_ATTENTION: 3208 dprintkl(KERN_DEBUG, 3209 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3210 cmd->cmnd[0], dcb->target_id, 3211 dcb->target_lun, status, acb->scan_devices); 3212 break; 3213 case ILLEGAL_REQUEST: 3214 dprintkl(KERN_DEBUG, 3215 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3216 cmd->cmnd[0], dcb->target_id, 3217 dcb->target_lun, status, acb->scan_devices); 3218 break; 3219 case MEDIUM_ERROR: 3220 dprintkl(KERN_DEBUG, 3221 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3222 cmd->cmnd[0], dcb->target_id, 3223 dcb->target_lun, status, acb->scan_devices); 3224 break; 3225 case HARDWARE_ERROR: 3226 dprintkl(KERN_DEBUG, 3227 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3228 cmd->cmnd[0], dcb->target_id, 3229 dcb->target_lun, status, acb->scan_devices); 3230 break; 3231 } 3232 if (cmd->sense_buffer[7] >= 6) 3233 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3234 "(0x%08x 0x%08x)\n", 3235 cmd->sense_buffer[2], cmd->sense_buffer[12], 3236 cmd->sense_buffer[13], 3237 *((unsigned int *)(cmd->sense_buffer + 3)), 3238 *((unsigned int *)(cmd->sense_buffer + 8))); 3239 else 3240 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3241 cmd->sense_buffer[2], 3242 *((unsigned int *)(cmd->sense_buffer + 3))); 3243 } 3244 3245 if (status == (CHECK_CONDITION << 1)) { 3246 cmd->result = DID_BAD_TARGET << 16; 3247 goto ckc_e; 3248 } 3249 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3250 3251 if (srb->total_xfer_length 3252 && srb->total_xfer_length >= cmd->underflow) 3253 cmd->result = 3254 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3255 srb->end_message, CHECK_CONDITION); 3256 /*SET_RES_DID(cmd->result,DID_OK) */ 3257 else 3258 cmd->result = 3259 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3260 srb->end_message, CHECK_CONDITION); 3261 3262 goto ckc_e; 3263 } 3264 3265/*************************************************************/ 3266 if (status) { 3267 /* 3268 * target status.......................... 3269 */ 3270 if (status_byte(status) == CHECK_CONDITION) { 3271 request_sense(acb, dcb, srb); 3272 return; 3273 } else if (status_byte(status) == QUEUE_FULL) { 3274 tempcnt = (u8)list_size(&dcb->srb_going_list); 3275 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3276 dcb->target_id, dcb->target_lun, tempcnt); 3277 if (tempcnt > 1) 3278 tempcnt--; 3279 dcb->max_command = tempcnt; 3280 free_tag(dcb, srb); 3281 list_move(&srb->list, &dcb->srb_waiting_list); 3282 waiting_set_timer(acb, HZ / 20); 3283 srb->adapter_status = 0; 3284 srb->target_status = 0; 3285 return; 3286 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3287 srb->adapter_status = H_SEL_TIMEOUT; 3288 srb->target_status = 0; 3289 cmd->result = DID_NO_CONNECT << 16; 3290 } else { 3291 srb->adapter_status = 0; 3292 SET_RES_DID(cmd->result, DID_ERROR); 3293 SET_RES_MSG(cmd->result, srb->end_message); 3294 SET_RES_TARGET(cmd->result, status); 3295 3296 } 3297 } else { 3298 /* 3299 ** process initiator status.......................... 3300 */ 3301 status = srb->adapter_status; 3302 if (status & H_OVER_UNDER_RUN) { 3303 srb->target_status = 0; 3304 SET_RES_DID(cmd->result, DID_OK); 3305 SET_RES_MSG(cmd->result, srb->end_message); 3306 } else if (srb->status & PARITY_ERROR) { 3307 SET_RES_DID(cmd->result, DID_PARITY); 3308 SET_RES_MSG(cmd->result, srb->end_message); 3309 } else { /* No error */ 3310 3311 srb->adapter_status = 0; 3312 srb->target_status = 0; 3313 SET_RES_DID(cmd->result, DID_OK); 3314 } 3315 } 3316 3317 ckc_only = 0; 3318/* Check Error Conditions */ 3319 ckc_e: 3320 3321 pci_unmap_srb(acb, srb); 3322 3323 if (cmd->cmnd[0] == INQUIRY) { 3324 unsigned char *base = NULL; 3325 struct ScsiInqData *ptr; 3326 unsigned long flags = 0; 3327 struct scatterlist* sg = scsi_sglist(cmd); 3328 size_t offset = 0, len = sizeof(struct ScsiInqData); 3329 3330 local_irq_save(flags); 3331 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); 3332 ptr = (struct ScsiInqData *)(base + offset); 3333 3334 if (!ckc_only && (cmd->result & RES_DID) == 0 3335 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 3336 && dir != DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3337 dcb->inquiry7 = ptr->Flags; 3338 3339 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3340 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3341 if ((cmd->result == (DID_OK << 16) || 3342 status_byte(cmd->result) == CHECK_CONDITION)) { 3343 if (!dcb->init_tcq_flag) { 3344 add_dev(acb, dcb, ptr); 3345 dcb->init_tcq_flag = 1; 3346 } 3347 } 3348 3349 scsi_kunmap_atomic_sg(base); 3350 local_irq_restore(flags); 3351 } 3352 3353 /* Here is the info for Doug Gilbert's sg3 ... */ 3354 scsi_set_resid(cmd, srb->total_xfer_length); 3355 /* This may be interpreted by sb. or not ... */ 3356 cmd->SCp.this_residual = srb->total_xfer_length; 3357 cmd->SCp.buffers_residual = 0; 3358 if (debug_enabled(DBG_KG)) { 3359 if (srb->total_xfer_length) 3360 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> " 3361 "cmnd=0x%02x Missed %i bytes\n", 3362 cmd, cmd->device->id, (u8)cmd->device->lun, 3363 cmd->cmnd[0], srb->total_xfer_length); 3364 } 3365 3366 if (srb != acb->tmp_srb) { 3367 /* Add to free list */ 3368 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n", 3369 cmd, cmd->result); 3370 list_move_tail(&srb->list, &acb->srb_free_list); 3371 } else { 3372 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3373 } 3374 3375 cmd->scsi_done(cmd); 3376 waiting_process_next(acb); 3377} 3378 3379 3380/* abort all cmds in our queues */ 3381static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3382 struct scsi_cmnd *cmd, u8 force) 3383{ 3384 struct DeviceCtlBlk *dcb; 3385 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3386 3387 list_for_each_entry(dcb, &acb->dcb_list, list) { 3388 struct ScsiReqBlk *srb; 3389 struct ScsiReqBlk *tmp; 3390 struct scsi_cmnd *p; 3391 3392 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3393 enum dma_data_direction dir; 3394 int result; 3395 3396 p = srb->cmd; 3397 dir = p->sc_data_direction; 3398 result = MK_RES(0, did_flag, 0, 0); 3399 printk("G:%p(%02i-%i) ", p, 3400 p->device->id, (u8)p->device->lun); 3401 list_del(&srb->list); 3402 free_tag(dcb, srb); 3403 list_add_tail(&srb->list, &acb->srb_free_list); 3404 p->result = result; 3405 pci_unmap_srb_sense(acb, srb); 3406 pci_unmap_srb(acb, srb); 3407 if (force) { 3408 /* For new EH, we normally don't need to give commands back, 3409 * as they all complete or all time out */ 3410 p->scsi_done(p); 3411 } 3412 } 3413 if (!list_empty(&dcb->srb_going_list)) 3414 dprintkl(KERN_DEBUG, 3415 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3416 dcb->target_id, dcb->target_lun); 3417 if (dcb->tag_mask) 3418 dprintkl(KERN_DEBUG, 3419 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3420 dcb->target_id, dcb->target_lun, 3421 dcb->tag_mask); 3422 3423 /* Waiting queue */ 3424 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3425 int result; 3426 p = srb->cmd; 3427 3428 result = MK_RES(0, did_flag, 0, 0); 3429 printk("W:%p<%02i-%i>", p, p->device->id, 3430 (u8)p->device->lun); 3431 list_move_tail(&srb->list, &acb->srb_free_list); 3432 p->result = result; 3433 pci_unmap_srb_sense(acb, srb); 3434 pci_unmap_srb(acb, srb); 3435 if (force) { 3436 /* For new EH, we normally don't need to give commands back, 3437 * as they all complete or all time out */ 3438 cmd->scsi_done(cmd); 3439 } 3440 } 3441 if (!list_empty(&dcb->srb_waiting_list)) 3442 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3443 list_size(&dcb->srb_waiting_list), dcb->target_id, 3444 dcb->target_lun); 3445 dcb->flag &= ~ABORT_DEV_; 3446 } 3447 printk("\n"); 3448} 3449 3450 3451static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3452{ 3453 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3454 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3455 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3456 3457 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3458 /* nothing */; 3459} 3460 3461 3462static void set_basic_config(struct AdapterCtlBlk *acb) 3463{ 3464 u8 bval; 3465 u16 wval; 3466 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3467 if (acb->config & HCC_PARITY) 3468 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3469 else 3470 bval = PHASELATCH | INITIATOR | BLOCKRST; 3471 3472 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3473 3474 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3475 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3476 /* program Host ID */ 3477 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3478 /* set ansynchronous transfer */ 3479 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3480 /* Turn LED control off */ 3481 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3482 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3483 /* DMA config */ 3484 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3485 wval |= 3486 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3487 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3488 /* Clear pending interrupt status */ 3489 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3490 /* Enable SCSI interrupt */ 3491 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3492 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3493 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3494 ); 3495} 3496 3497 3498static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3499{ 3500 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3501 /* delay half a second */ 3502 if (timer_pending(&acb->waiting_timer)) 3503 del_timer(&acb->waiting_timer); 3504 3505 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3506 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3507 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3508 udelay(500); 3509 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3510 acb->last_reset = 3511 jiffies + 5 * HZ / 2 + 3512 HZ * acb->eeprom.delay_time; 3513 3514 clear_fifo(acb, "scsi_reset_detect"); 3515 set_basic_config(acb); 3516 /*1.25 */ 3517 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3518 3519 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3520 acb->acb_flag |= RESET_DONE; 3521 } else { 3522 acb->acb_flag |= RESET_DETECT; 3523 reset_dev_param(acb); 3524 doing_srb_done(acb, DID_RESET, NULL, 1); 3525 /*DC395x_RecoverSRB( acb ); */ 3526 acb->active_dcb = NULL; 3527 acb->acb_flag = 0; 3528 waiting_process_next(acb); 3529 } 3530} 3531 3532 3533static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3534 struct ScsiReqBlk *srb) 3535{ 3536 struct scsi_cmnd *cmd = srb->cmd; 3537 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n", 3538 cmd, cmd->device->id, (u8)cmd->device->lun); 3539 3540 srb->flag |= AUTO_REQSENSE; 3541 srb->adapter_status = 0; 3542 srb->target_status = 0; 3543 3544 /* KG: Can this prevent crap sense data ? */ 3545 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 3546 3547 /* Save some data */ 3548 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3549 srb->segment_x[0].address; 3550 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3551 srb->segment_x[0].length; 3552 srb->xferred = srb->total_xfer_length; 3553 /* srb->segment_x : a one entry of S/G list table */ 3554 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE; 3555 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; 3556 /* Map sense buffer */ 3557 srb->segment_x[0].address = dma_map_single(&acb->dev->dev, 3558 cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, 3559 DMA_FROM_DEVICE); 3560 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3561 cmd->sense_buffer, srb->segment_x[0].address, 3562 SCSI_SENSE_BUFFERSIZE); 3563 srb->sg_count = 1; 3564 srb->sg_index = 0; 3565 3566 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3567 dprintkl(KERN_DEBUG, 3568 "request_sense: (0x%p) failed <%02i-%i>\n", 3569 srb->cmd, dcb->target_id, dcb->target_lun); 3570 list_move(&srb->list, &dcb->srb_waiting_list); 3571 waiting_set_timer(acb, HZ / 100); 3572 } 3573} 3574 3575 3576/** 3577 * device_alloc - Allocate a new device instance. This create the 3578 * devices instance and sets up all the data items. The adapter 3579 * instance is required to obtain confiuration information for this 3580 * device. This does *not* add this device to the adapters device 3581 * list. 3582 * 3583 * @acb: The adapter to obtain configuration information from. 3584 * @target: The target for the new device. 3585 * @lun: The lun for the new device. 3586 * 3587 * Return the new device if successful or NULL on failure. 3588 **/ 3589static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3590 u8 target, u8 lun) 3591{ 3592 struct NvRamType *eeprom = &acb->eeprom; 3593 u8 period_index = eeprom->target[target].period & 0x07; 3594 struct DeviceCtlBlk *dcb; 3595 3596 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3597 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3598 if (!dcb) 3599 return NULL; 3600 dcb->acb = NULL; 3601 INIT_LIST_HEAD(&dcb->srb_going_list); 3602 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3603 dcb->active_srb = NULL; 3604 dcb->tag_mask = 0; 3605 dcb->max_command = 1; 3606 dcb->target_id = target; 3607 dcb->target_lun = lun; 3608 dcb->dev_mode = eeprom->target[target].cfg0; 3609#ifndef DC395x_NO_DISCONNECT 3610 dcb->identify_msg = 3611 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3612#else 3613 dcb->identify_msg = IDENTIFY(0, lun); 3614#endif 3615 dcb->inquiry7 = 0; 3616 dcb->sync_mode = 0; 3617 dcb->min_nego_period = clock_period[period_index]; 3618 dcb->sync_period = 0; 3619 dcb->sync_offset = 0; 3620 dcb->flag = 0; 3621 3622#ifndef DC395x_NO_WIDE 3623 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3624 && (acb->config & HCC_WIDE_CARD)) 3625 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3626#endif 3627#ifndef DC395x_NO_SYNC 3628 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3629 if (!(lun) || current_sync_offset) 3630 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3631#endif 3632 if (dcb->target_lun != 0) { 3633 /* Copy settings */ 3634 struct DeviceCtlBlk *p = NULL, *iter; 3635 3636 list_for_each_entry(iter, &acb->dcb_list, list) 3637 if (iter->target_id == dcb->target_id) { 3638 p = iter; 3639 break; 3640 } 3641 3642 if (!p) { 3643 kfree(dcb); 3644 return NULL; 3645 } 3646 3647 dprintkdbg(DBG_1, 3648 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3649 dcb->target_id, dcb->target_lun, 3650 p->target_id, p->target_lun); 3651 dcb->sync_mode = p->sync_mode; 3652 dcb->sync_period = p->sync_period; 3653 dcb->min_nego_period = p->min_nego_period; 3654 dcb->sync_offset = p->sync_offset; 3655 dcb->inquiry7 = p->inquiry7; 3656 } 3657 return dcb; 3658} 3659 3660 3661/** 3662 * adapter_add_device - Adds the device instance to the adaptor instance. 3663 * 3664 * @acb: The adapter device to be updated 3665 * @dcb: A newly created and initialised device instance to add. 3666 **/ 3667static void adapter_add_device(struct AdapterCtlBlk *acb, 3668 struct DeviceCtlBlk *dcb) 3669{ 3670 /* backpointer to adapter */ 3671 dcb->acb = acb; 3672 3673 /* set run_robin to this device if it is currently empty */ 3674 if (list_empty(&acb->dcb_list)) 3675 acb->dcb_run_robin = dcb; 3676 3677 /* add device to list */ 3678 list_add_tail(&dcb->list, &acb->dcb_list); 3679 3680 /* update device maps */ 3681 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3682 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3683} 3684 3685 3686/** 3687 * adapter_remove_device - Removes the device instance from the adaptor 3688 * instance. The device instance is not check in any way or freed by this. 3689 * The caller is expected to take care of that. This will simply remove the 3690 * device from the adapters data strcutures. 3691 * 3692 * @acb: The adapter device to be updated 3693 * @dcb: A device that has previously been added to the adapter. 3694 **/ 3695static void adapter_remove_device(struct AdapterCtlBlk *acb, 3696 struct DeviceCtlBlk *dcb) 3697{ 3698 struct DeviceCtlBlk *i; 3699 struct DeviceCtlBlk *tmp; 3700 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3701 dcb->target_id, dcb->target_lun); 3702 3703 /* fix up any pointers to this device that we have in the adapter */ 3704 if (acb->active_dcb == dcb) 3705 acb->active_dcb = NULL; 3706 if (acb->dcb_run_robin == dcb) 3707 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3708 3709 /* unlink from list */ 3710 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3711 if (dcb == i) { 3712 list_del(&i->list); 3713 break; 3714 } 3715 3716 /* clear map and children */ 3717 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3718 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3719 dcb->acb = NULL; 3720} 3721 3722 3723/** 3724 * adapter_remove_and_free_device - Removes a single device from the adapter 3725 * and then frees the device information. 3726 * 3727 * @acb: The adapter device to be updated 3728 * @dcb: A device that has previously been added to the adapter. 3729 */ 3730static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3731 struct DeviceCtlBlk *dcb) 3732{ 3733 if (list_size(&dcb->srb_going_list) > 1) { 3734 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3735 "Won't remove because of %i active requests.\n", 3736 dcb->target_id, dcb->target_lun, 3737 list_size(&dcb->srb_going_list)); 3738 return; 3739 } 3740 adapter_remove_device(acb, dcb); 3741 kfree(dcb); 3742} 3743 3744 3745/** 3746 * adapter_remove_and_free_all_devices - Removes and frees all of the 3747 * devices associated with the specified adapter. 3748 * 3749 * @acb: The adapter from which all devices should be removed. 3750 **/ 3751static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3752{ 3753 struct DeviceCtlBlk *dcb; 3754 struct DeviceCtlBlk *tmp; 3755 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3756 list_size(&acb->dcb_list)); 3757 3758 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3759 adapter_remove_and_free_device(acb, dcb); 3760} 3761 3762 3763/** 3764 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3765 * scsi device that we need to deal with. We allocate a new device and then 3766 * insert that device into the adapters device list. 3767 * 3768 * @scsi_device: The new scsi device that we need to handle. 3769 **/ 3770static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3771{ 3772 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3773 struct DeviceCtlBlk *dcb; 3774 3775 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3776 if (!dcb) 3777 return -ENOMEM; 3778 adapter_add_device(acb, dcb); 3779 3780 return 0; 3781} 3782 3783 3784/** 3785 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3786 * device that is going away. 3787 * 3788 * @scsi_device: The new scsi device that we need to handle. 3789 **/ 3790static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3791{ 3792 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3793 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3794 if (dcb) 3795 adapter_remove_and_free_device(acb, dcb); 3796} 3797 3798 3799 3800 3801/** 3802 * trms1040_wait_30us: wait for 30 us 3803 * 3804 * Waits for 30us (using the chip by the looks of it..) 3805 * 3806 * @io_port: base I/O address 3807 **/ 3808static void trms1040_wait_30us(unsigned long io_port) 3809{ 3810 /* ScsiPortStallExecution(30); wait 30 us */ 3811 outb(5, io_port + TRM_S1040_GEN_TIMER); 3812 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3813 /* nothing */ ; 3814} 3815 3816 3817/** 3818 * trms1040_write_cmd - write the secified command and address to 3819 * chip 3820 * 3821 * @io_port: base I/O address 3822 * @cmd: SB + op code (command) to send 3823 * @addr: address to send 3824 **/ 3825static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3826{ 3827 int i; 3828 u8 send_data; 3829 3830 /* program SB + OP code */ 3831 for (i = 0; i < 3; i++, cmd <<= 1) { 3832 send_data = NVR_SELECT; 3833 if (cmd & 0x04) /* Start from bit 2 */ 3834 send_data |= NVR_BITOUT; 3835 3836 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3837 trms1040_wait_30us(io_port); 3838 outb((send_data | NVR_CLOCK), 3839 io_port + TRM_S1040_GEN_NVRAM); 3840 trms1040_wait_30us(io_port); 3841 } 3842 3843 /* send address */ 3844 for (i = 0; i < 7; i++, addr <<= 1) { 3845 send_data = NVR_SELECT; 3846 if (addr & 0x40) /* Start from bit 6 */ 3847 send_data |= NVR_BITOUT; 3848 3849 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3850 trms1040_wait_30us(io_port); 3851 outb((send_data | NVR_CLOCK), 3852 io_port + TRM_S1040_GEN_NVRAM); 3853 trms1040_wait_30us(io_port); 3854 } 3855 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3856 trms1040_wait_30us(io_port); 3857} 3858 3859 3860/** 3861 * trms1040_set_data - store a single byte in the eeprom 3862 * 3863 * Called from write all to write a single byte into the SSEEPROM 3864 * Which is done one bit at a time. 3865 * 3866 * @io_port: base I/O address 3867 * @addr: offset into EEPROM 3868 * @byte: bytes to write 3869 **/ 3870static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 3871{ 3872 int i; 3873 u8 send_data; 3874 3875 /* Send write command & address */ 3876 trms1040_write_cmd(io_port, 0x05, addr); 3877 3878 /* Write data */ 3879 for (i = 0; i < 8; i++, byte <<= 1) { 3880 send_data = NVR_SELECT; 3881 if (byte & 0x80) /* Start from bit 7 */ 3882 send_data |= NVR_BITOUT; 3883 3884 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3885 trms1040_wait_30us(io_port); 3886 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 3887 trms1040_wait_30us(io_port); 3888 } 3889 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3890 trms1040_wait_30us(io_port); 3891 3892 /* Disable chip select */ 3893 outb(0, io_port + TRM_S1040_GEN_NVRAM); 3894 trms1040_wait_30us(io_port); 3895 3896 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3897 trms1040_wait_30us(io_port); 3898 3899 /* Wait for write ready */ 3900 while (1) { 3901 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 3902 trms1040_wait_30us(io_port); 3903 3904 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3905 trms1040_wait_30us(io_port); 3906 3907 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 3908 break; 3909 } 3910 3911 /* Disable chip select */ 3912 outb(0, io_port + TRM_S1040_GEN_NVRAM); 3913} 3914 3915 3916/** 3917 * trms1040_write_all - write 128 bytes to the eeprom 3918 * 3919 * Write the supplied 128 bytes to the chips SEEPROM 3920 * 3921 * @eeprom: the data to write 3922 * @io_port: the base io port 3923 **/ 3924static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 3925{ 3926 u8 *b_eeprom = (u8 *)eeprom; 3927 u8 addr; 3928 3929 /* Enable SEEPROM */ 3930 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 3931 io_port + TRM_S1040_GEN_CONTROL); 3932 3933 /* write enable */ 3934 trms1040_write_cmd(io_port, 0x04, 0xFF); 3935 outb(0, io_port + TRM_S1040_GEN_NVRAM); 3936 trms1040_wait_30us(io_port); 3937 3938 /* write */ 3939 for (addr = 0; addr < 128; addr++, b_eeprom++) 3940 trms1040_set_data(io_port, addr, *b_eeprom); 3941 3942 /* write disable */ 3943 trms1040_write_cmd(io_port, 0x04, 0x00); 3944 outb(0, io_port + TRM_S1040_GEN_NVRAM); 3945 trms1040_wait_30us(io_port); 3946 3947 /* Disable SEEPROM */ 3948 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 3949 io_port + TRM_S1040_GEN_CONTROL); 3950} 3951 3952 3953/** 3954 * trms1040_get_data - get a single byte from the eeprom 3955 * 3956 * Called from read all to read a single byte into the SSEEPROM 3957 * Which is done one bit at a time. 3958 * 3959 * @io_port: base I/O address 3960 * @addr: offset into SEEPROM 3961 * 3962 * Returns the byte read. 3963 **/ 3964static u8 trms1040_get_data(unsigned long io_port, u8 addr) 3965{ 3966 int i; 3967 u8 read_byte; 3968 u8 result = 0; 3969 3970 /* Send read command & address */ 3971 trms1040_write_cmd(io_port, 0x06, addr); 3972 3973 /* read data */ 3974 for (i = 0; i < 8; i++) { 3975 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 3976 trms1040_wait_30us(io_port); 3977 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3978 3979 /* Get data bit while falling edge */ 3980 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 3981 result <<= 1; 3982 if (read_byte & NVR_BITIN) 3983 result |= 1; 3984 3985 trms1040_wait_30us(io_port); 3986 } 3987 3988 /* Disable chip select */ 3989 outb(0, io_port + TRM_S1040_GEN_NVRAM); 3990 return result; 3991} 3992 3993 3994/** 3995 * trms1040_read_all - read all bytes from the eeprom 3996 * 3997 * Read the 128 bytes from the SEEPROM. 3998 * 3999 * @eeprom: where to store the data 4000 * @io_port: the base io port 4001 **/ 4002static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4003{ 4004 u8 *b_eeprom = (u8 *)eeprom; 4005 u8 addr; 4006 4007 /* Enable SEEPROM */ 4008 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4009 io_port + TRM_S1040_GEN_CONTROL); 4010 4011 /* read details */ 4012 for (addr = 0; addr < 128; addr++, b_eeprom++) 4013 *b_eeprom = trms1040_get_data(io_port, addr); 4014 4015 /* Disable SEEPROM */ 4016 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4017 io_port + TRM_S1040_GEN_CONTROL); 4018} 4019 4020 4021 4022/** 4023 * check_eeprom - get and check contents of the eeprom 4024 * 4025 * Read seeprom 128 bytes into the memory provider in eeprom. 4026 * Checks the checksum and if it's not correct it uses a set of default 4027 * values. 4028 * 4029 * @eeprom: caller allocated strcuture to read the eeprom data into 4030 * @io_port: io port to read from 4031 **/ 4032static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4033{ 4034 u16 *w_eeprom = (u16 *)eeprom; 4035 u16 w_addr; 4036 u16 cksum; 4037 u32 d_addr; 4038 u32 *d_eeprom; 4039 4040 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4041 4042 cksum = 0; 4043 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4044 w_addr++, w_eeprom++) 4045 cksum += *w_eeprom; 4046 if (cksum != 0x1234) { 4047 /* 4048 * Checksum is wrong. 4049 * Load a set of defaults into the eeprom buffer 4050 */ 4051 dprintkl(KERN_WARNING, 4052 "EEProm checksum error: using default values and options.\n"); 4053 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4054 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4055 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4056 eeprom->sub_sys_id[1] = 4057 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4058 eeprom->sub_class = 0x00; 4059 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4060 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4061 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4062 eeprom->device_id[1] = 4063 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4064 eeprom->reserved = 0x00; 4065 4066 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4067 d_addr < 16; d_addr++, d_eeprom++) 4068 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4069 4070 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4071 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4072 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4073 *d_eeprom = 0x00; 4074 4075 /* Now load defaults (maybe set by boot/module params) */ 4076 set_safe_settings(); 4077 fix_settings(); 4078 eeprom_override(eeprom); 4079 4080 eeprom->cksum = 0x00; 4081 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4082 w_addr < 63; w_addr++, w_eeprom++) 4083 cksum += *w_eeprom; 4084 4085 *w_eeprom = 0x1234 - cksum; 4086 trms1040_write_all(eeprom, io_port); 4087 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4088 } else { 4089 set_safe_settings(); 4090 eeprom_index_to_delay(eeprom); 4091 eeprom_override(eeprom); 4092 } 4093} 4094 4095 4096/** 4097 * print_eeprom_settings - output the eeprom settings 4098 * to the kernel log so people can see what they were. 4099 * 4100 * @eeprom: The eeprom data strucutre to show details for. 4101 **/ 4102static void print_eeprom_settings(struct NvRamType *eeprom) 4103{ 4104 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4105 eeprom->scsi_id, 4106 eeprom->target[0].period, 4107 clock_speed[eeprom->target[0].period] / 10, 4108 clock_speed[eeprom->target[0].period] % 10, 4109 eeprom->target[0].cfg0); 4110 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4111 eeprom->channel_cfg, eeprom->max_tag, 4112 1 << eeprom->max_tag, eeprom->delay_time); 4113} 4114 4115 4116/* Free SG tables */ 4117static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4118{ 4119 int i; 4120 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4121 4122 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4123 kfree(acb->srb_array[i].segment_x); 4124} 4125 4126 4127/* 4128 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4129 * should never cross a page boundary */ 4130static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4131{ 4132 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4133 *SEGMENTX_LEN; 4134 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4135 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4136 int srb_idx = 0; 4137 unsigned i = 0; 4138 struct SGentry *ptr; 4139 4140 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4141 acb->srb_array[i].segment_x = NULL; 4142 4143 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4144 while (pages--) { 4145 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); 4146 if (!ptr) { 4147 adapter_sg_tables_free(acb); 4148 return 1; 4149 } 4150 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4151 PAGE_SIZE, ptr, srb_idx); 4152 i = 0; 4153 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4154 acb->srb_array[srb_idx++].segment_x = 4155 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4156 } 4157 if (i < srbs_per_page) 4158 acb->srb.segment_x = 4159 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4160 else 4161 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4162 return 0; 4163} 4164 4165 4166 4167/** 4168 * adapter_print_config - print adapter connection and termination 4169 * config 4170 * 4171 * The io port in the adapter needs to have been set before calling 4172 * this function. 4173 * 4174 * @acb: The adapter to print the information for. 4175 **/ 4176static void adapter_print_config(struct AdapterCtlBlk *acb) 4177{ 4178 u8 bval; 4179 4180 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4181 dprintkl(KERN_INFO, "%sConnectors: ", 4182 ((bval & WIDESCSI) ? "(Wide) " : "")); 4183 if (!(bval & CON5068)) 4184 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4185 if (!(bval & CON68)) 4186 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4187 if (!(bval & CON50)) 4188 printk("int50 "); 4189 if ((bval & (CON5068 | CON50 | CON68)) == 4190 0 /*(CON5068 | CON50 | CON68) */ ) 4191 printk(" Oops! (All 3?) "); 4192 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4193 printk(" Termination: "); 4194 if (bval & DIS_TERM) 4195 printk("Disabled\n"); 4196 else { 4197 if (bval & AUTOTERM) 4198 printk("Auto "); 4199 if (bval & LOW8TERM) 4200 printk("Low "); 4201 if (bval & UP8TERM) 4202 printk("High "); 4203 printk("\n"); 4204 } 4205} 4206 4207 4208/** 4209 * adapter_init_params - Initialize the various parameters in the 4210 * adapter structure. Note that the pointer to the scsi_host is set 4211 * early (when this instance is created) and the io_port and irq 4212 * values are set later after they have been reserved. This just gets 4213 * everything set to a good starting position. 4214 * 4215 * The eeprom structure in the adapter needs to have been set before 4216 * calling this function. 4217 * 4218 * @acb: The adapter to initialize. 4219 **/ 4220static void adapter_init_params(struct AdapterCtlBlk *acb) 4221{ 4222 struct NvRamType *eeprom = &acb->eeprom; 4223 int i; 4224 4225 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4226 /* NOTE: acb->io_port_base is set at port registration time */ 4227 /* NOTE: acb->io_port_len is set at port registration time */ 4228 4229 INIT_LIST_HEAD(&acb->dcb_list); 4230 acb->dcb_run_robin = NULL; 4231 acb->active_dcb = NULL; 4232 4233 INIT_LIST_HEAD(&acb->srb_free_list); 4234 /* temp SRB for Q tag used or abort command used */ 4235 acb->tmp_srb = &acb->srb; 4236 timer_setup(&acb->waiting_timer, waiting_timeout, 0); 4237 timer_setup(&acb->selto_timer, NULL, 0); 4238 4239 acb->srb_count = DC395x_MAX_SRB_CNT; 4240 4241 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4242 /* NOTE: acb->irq_level is set at IRQ registration time */ 4243 4244 acb->tag_max_num = 1 << eeprom->max_tag; 4245 if (acb->tag_max_num > 30) 4246 acb->tag_max_num = 30; 4247 4248 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4249 acb->gmode2 = eeprom->channel_cfg; 4250 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4251 4252 if (eeprom->channel_cfg & NAC_SCANLUN) 4253 acb->lun_chk = 1; 4254 acb->scan_devices = 1; 4255 4256 acb->scsi_host->this_id = eeprom->scsi_id; 4257 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4258 4259 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4260 acb->dcb_map[i] = 0; 4261 4262 acb->msg_len = 0; 4263 4264 /* link static array of srbs into the srb free list */ 4265 for (i = 0; i < acb->srb_count - 1; i++) 4266 list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list); 4267} 4268 4269 4270/** 4271 * adapter_init_host - Initialize the scsi host instance based on 4272 * values that we have already stored in the adapter instance. There's 4273 * some mention that a lot of these are deprecated, so we won't use 4274 * them (we'll use the ones in the adapter instance) but we'll fill 4275 * them in in case something else needs them. 4276 * 4277 * The eeprom structure, irq and io ports in the adapter need to have 4278 * been set before calling this function. 4279 * 4280 * @host: The scsi host instance to fill in the values for. 4281 **/ 4282static void adapter_init_scsi_host(struct Scsi_Host *host) 4283{ 4284 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4285 struct NvRamType *eeprom = &acb->eeprom; 4286 4287 host->max_cmd_len = 24; 4288 host->can_queue = DC395x_MAX_CMD_QUEUE; 4289 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4290 host->this_id = (int)eeprom->scsi_id; 4291 host->io_port = acb->io_port_base; 4292 host->n_io_port = acb->io_port_len; 4293 host->dma_channel = -1; 4294 host->unique_id = acb->io_port_base; 4295 host->irq = acb->irq_level; 4296 acb->last_reset = jiffies; 4297 4298 host->max_id = 16; 4299 if (host->max_id - 1 == eeprom->scsi_id) 4300 host->max_id--; 4301 4302 if (eeprom->channel_cfg & NAC_SCANLUN) 4303 host->max_lun = 8; 4304 else 4305 host->max_lun = 1; 4306} 4307 4308 4309/** 4310 * adapter_init_chip - Get the chip into a know state and figure out 4311 * some of the settings that apply to this adapter. 4312 * 4313 * The io port in the adapter needs to have been set before calling 4314 * this function. The config will be configured correctly on return. 4315 * 4316 * @acb: The adapter which we are to init. 4317 **/ 4318static void adapter_init_chip(struct AdapterCtlBlk *acb) 4319{ 4320 struct NvRamType *eeprom = &acb->eeprom; 4321 4322 /* Mask all the interrupt */ 4323 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4324 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4325 4326 /* Reset SCSI module */ 4327 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4328 4329 /* Reset PCI/DMA module */ 4330 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4331 udelay(20); 4332 4333 /* program configuration 0 */ 4334 acb->config = HCC_AUTOTERM | HCC_PARITY; 4335 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4336 acb->config |= HCC_WIDE_CARD; 4337 4338 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4339 acb->config |= HCC_SCSI_RESET; 4340 4341 if (acb->config & HCC_SCSI_RESET) { 4342 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4343 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4344 4345 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4346 /*spin_unlock_irq (&io_request_lock); */ 4347 udelay(500); 4348 4349 acb->last_reset = 4350 jiffies + HZ / 2 + 4351 HZ * acb->eeprom.delay_time; 4352 4353 /*spin_lock_irq (&io_request_lock); */ 4354 } 4355} 4356 4357 4358/** 4359 * init_adapter - Grab the resource for the card, setup the adapter 4360 * information, set the card into a known state, create the various 4361 * tables etc etc. This basically gets all adapter information all up 4362 * to date, initialised and gets the chip in sync with it. 4363 * 4364 * @host: This hosts adapter structure 4365 * @io_port: The base I/O port 4366 * @irq: IRQ 4367 * 4368 * Returns 0 if the initialization succeeds, any other value on 4369 * failure. 4370 **/ 4371static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port, 4372 u32 io_port_len, unsigned int irq) 4373{ 4374 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4375 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4376 goto failed; 4377 } 4378 /* store port base to indicate we have registered it */ 4379 acb->io_port_base = io_port; 4380 acb->io_port_len = io_port_len; 4381 4382 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { 4383 /* release the region we just claimed */ 4384 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4385 goto failed; 4386 } 4387 /* store irq to indicate we have registered it */ 4388 acb->irq_level = irq; 4389 4390 /* get eeprom configuration information and command line settings etc */ 4391 check_eeprom(&acb->eeprom, io_port); 4392 print_eeprom_settings(&acb->eeprom); 4393 4394 /* setup adapter control block */ 4395 adapter_init_params(acb); 4396 4397 /* display card connectors/termination settings */ 4398 adapter_print_config(acb); 4399 4400 if (adapter_sg_tables_alloc(acb)) { 4401 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4402 goto failed; 4403 } 4404 adapter_init_scsi_host(acb->scsi_host); 4405 adapter_init_chip(acb); 4406 set_basic_config(acb); 4407 4408 dprintkdbg(DBG_0, 4409 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4410 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4411 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4412 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4413 return 0; 4414 4415failed: 4416 if (acb->irq_level) 4417 free_irq(acb->irq_level, acb); 4418 if (acb->io_port_base) 4419 release_region(acb->io_port_base, acb->io_port_len); 4420 adapter_sg_tables_free(acb); 4421 4422 return 1; 4423} 4424 4425 4426/** 4427 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4428 * stopping all operations and disabling interrupt generation on the 4429 * card. 4430 * 4431 * @acb: The adapter which we are to shutdown. 4432 **/ 4433static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4434{ 4435 /* disable interrupts */ 4436 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4437 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4438 4439 /* reset the scsi bus */ 4440 if (acb->config & HCC_SCSI_RESET) 4441 reset_scsi_bus(acb); 4442 4443 /* clear any pending interrupt state */ 4444 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4445} 4446 4447 4448 4449/** 4450 * adapter_uninit - Shut down the chip and release any resources that 4451 * we had allocated. Once this returns the adapter should not be used 4452 * anymore. 4453 * 4454 * @acb: The adapter which we are to un-initialize. 4455 **/ 4456static void adapter_uninit(struct AdapterCtlBlk *acb) 4457{ 4458 unsigned long flags; 4459 DC395x_LOCK_IO(acb->scsi_host, flags); 4460 4461 /* remove timers */ 4462 if (timer_pending(&acb->waiting_timer)) 4463 del_timer(&acb->waiting_timer); 4464 if (timer_pending(&acb->selto_timer)) 4465 del_timer(&acb->selto_timer); 4466 4467 adapter_uninit_chip(acb); 4468 adapter_remove_and_free_all_devices(acb); 4469 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4470 4471 if (acb->irq_level) 4472 free_irq(acb->irq_level, acb); 4473 if (acb->io_port_base) 4474 release_region(acb->io_port_base, acb->io_port_len); 4475 4476 adapter_sg_tables_free(acb); 4477} 4478 4479 4480#undef YESNO 4481#define YESNO(YN) \ 4482 if (YN) seq_printf(m, " Yes ");\ 4483 else seq_printf(m, " No ") 4484 4485static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host) 4486{ 4487 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4488 int spd, spd1; 4489 struct DeviceCtlBlk *dcb; 4490 unsigned long flags; 4491 int dev; 4492 4493 seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n" 4494 " Driver Version " DC395X_VERSION "\n"); 4495 4496 DC395x_LOCK_IO(acb->scsi_host, flags); 4497 4498 seq_printf(m, "SCSI Host Nr %i, ", host->host_no); 4499 seq_printf(m, "DC395U/UW/F DC315/U %s\n", 4500 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4501 seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base); 4502 seq_printf(m, "irq_level 0x%04x, ", acb->irq_level); 4503 seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4504 4505 seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun); 4506 seq_printf(m, "AdapterID %i\n", host->this_id); 4507 4508 seq_printf(m, "tag_max_num %i", acb->tag_max_num); 4509 /*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4510 seq_printf(m, ", FilterCfg 0x%02x", 4511 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4512 seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time); 4513 /*seq_printf(m, "\n"); */ 4514 4515 seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4516 seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]); 4517 seq_printf(m, " %8ph\n", &acb->dcb_map[8]); 4518 4519 seq_puts(m, 4520 "Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4521 4522 dev = 0; 4523 list_for_each_entry(dcb, &acb->dcb_list, list) { 4524 int nego_period; 4525 seq_printf(m, "%02i %02i %02i ", dev, dcb->target_id, 4526 dcb->target_lun); 4527 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4528 YESNO(dcb->sync_offset); 4529 YESNO(dcb->sync_period & WIDE_SYNC); 4530 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4531 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4532 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4533 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4534 if (dcb->sync_offset) 4535 seq_printf(m, " %03i ns ", nego_period); 4536 else 4537 seq_printf(m, " (%03i ns)", (dcb->min_nego_period << 2)); 4538 4539 if (dcb->sync_offset & 0x0f) { 4540 spd = 1000 / (nego_period); 4541 spd1 = 1000 % (nego_period); 4542 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4543 seq_printf(m, " %2i.%1i M %02i ", spd, spd1, 4544 (dcb->sync_offset & 0x0f)); 4545 } else 4546 seq_puts(m, " "); 4547 4548 /* Add more info ... */ 4549 seq_printf(m, " %02i\n", dcb->max_command); 4550 dev++; 4551 } 4552 4553 if (timer_pending(&acb->waiting_timer)) 4554 seq_puts(m, "Waiting queue timer running\n"); 4555 else 4556 seq_putc(m, '\n'); 4557 4558 list_for_each_entry(dcb, &acb->dcb_list, list) { 4559 struct ScsiReqBlk *srb; 4560 if (!list_empty(&dcb->srb_waiting_list)) 4561 seq_printf(m, "DCB (%02i-%i): Waiting: %i:", 4562 dcb->target_id, dcb->target_lun, 4563 list_size(&dcb->srb_waiting_list)); 4564 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4565 seq_printf(m, " %p", srb->cmd); 4566 if (!list_empty(&dcb->srb_going_list)) 4567 seq_printf(m, "\nDCB (%02i-%i): Going : %i:", 4568 dcb->target_id, dcb->target_lun, 4569 list_size(&dcb->srb_going_list)); 4570 list_for_each_entry(srb, &dcb->srb_going_list, list) 4571 seq_printf(m, " %p", srb->cmd); 4572 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4573 seq_putc(m, '\n'); 4574 } 4575 4576 if (debug_enabled(DBG_1)) { 4577 seq_printf(m, "DCB list for ACB %p:\n", acb); 4578 list_for_each_entry(dcb, &acb->dcb_list, list) { 4579 seq_printf(m, "%p -> ", dcb); 4580 } 4581 seq_puts(m, "END\n"); 4582 } 4583 4584 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4585 return 0; 4586} 4587 4588 4589static struct scsi_host_template dc395x_driver_template = { 4590 .module = THIS_MODULE, 4591 .proc_name = DC395X_NAME, 4592 .show_info = dc395x_show_info, 4593 .name = DC395X_BANNER " " DC395X_VERSION, 4594 .queuecommand = dc395x_queue_command, 4595 .slave_alloc = dc395x_slave_alloc, 4596 .slave_destroy = dc395x_slave_destroy, 4597 .can_queue = DC395x_MAX_CAN_QUEUE, 4598 .this_id = 7, 4599 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4600 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4601 .eh_abort_handler = dc395x_eh_abort, 4602 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4603 .dma_boundary = PAGE_SIZE - 1, 4604}; 4605 4606 4607/** 4608 * banner_display - Display banner on first instance of driver 4609 * initialized. 4610 **/ 4611static void banner_display(void) 4612{ 4613 static int banner_done = 0; 4614 if (!banner_done) 4615 { 4616 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4617 banner_done = 1; 4618 } 4619} 4620 4621 4622/** 4623 * dc395x_init_one - Initialise a single instance of the adapter. 4624 * 4625 * The PCI layer will call this once for each instance of the adapter 4626 * that it finds in the system. The pci_dev strcuture indicates which 4627 * instance we are being called from. 4628 * 4629 * @dev: The PCI device to initialize. 4630 * @id: Looks like a pointer to the entry in our pci device table 4631 * that was actually matched by the PCI subsystem. 4632 * 4633 * Returns 0 on success, or an error code (-ve) on failure. 4634 **/ 4635static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id) 4636{ 4637 struct Scsi_Host *scsi_host = NULL; 4638 struct AdapterCtlBlk *acb = NULL; 4639 unsigned long io_port_base; 4640 unsigned int io_port_len; 4641 unsigned int irq; 4642 4643 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4644 banner_display(); 4645 4646 if (pci_enable_device(dev)) 4647 { 4648 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4649 return -ENODEV; 4650 } 4651 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4652 io_port_len = pci_resource_len(dev, 0); 4653 irq = dev->irq; 4654 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4655 4656 /* allocate scsi host information (includes out adapter) */ 4657 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4658 sizeof(struct AdapterCtlBlk)); 4659 if (!scsi_host) { 4660 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4661 goto fail; 4662 } 4663 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4664 acb->scsi_host = scsi_host; 4665 acb->dev = dev; 4666 4667 /* initialise the adapter and everything we need */ 4668 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4669 dprintkl(KERN_INFO, "adapter init failed\n"); 4670 acb = NULL; 4671 goto fail; 4672 } 4673 4674 pci_set_master(dev); 4675 4676 /* get the scsi mid level to scan for new devices on the bus */ 4677 if (scsi_add_host(scsi_host, &dev->dev)) { 4678 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4679 goto fail; 4680 } 4681 pci_set_drvdata(dev, scsi_host); 4682 scsi_scan_host(scsi_host); 4683 4684 return 0; 4685 4686fail: 4687 if (acb != NULL) 4688 adapter_uninit(acb); 4689 if (scsi_host != NULL) 4690 scsi_host_put(scsi_host); 4691 pci_disable_device(dev); 4692 return -ENODEV; 4693} 4694 4695 4696/** 4697 * dc395x_remove_one - Called to remove a single instance of the 4698 * adapter. 4699 * 4700 * @dev: The PCI device to initialize. 4701 **/ 4702static void dc395x_remove_one(struct pci_dev *dev) 4703{ 4704 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4705 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4706 4707 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4708 4709 scsi_remove_host(scsi_host); 4710 adapter_uninit(acb); 4711 pci_disable_device(dev); 4712 scsi_host_put(scsi_host); 4713} 4714 4715 4716static struct pci_device_id dc395x_pci_table[] = { 4717 { 4718 .vendor = PCI_VENDOR_ID_TEKRAM, 4719 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4720 .subvendor = PCI_ANY_ID, 4721 .subdevice = PCI_ANY_ID, 4722 }, 4723 {} /* Terminating entry */ 4724}; 4725MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4726 4727 4728static struct pci_driver dc395x_driver = { 4729 .name = DC395X_NAME, 4730 .id_table = dc395x_pci_table, 4731 .probe = dc395x_init_one, 4732 .remove = dc395x_remove_one, 4733}; 4734module_pci_driver(dc395x_driver); 4735 4736MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4737MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4738MODULE_LICENSE("GPL"); 4739