dc395x.c revision b80ca4f7ee36c26d300c5a8f429e73372d153379
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 <asm/io.h> 61 62#include <scsi/scsi.h> 63#include <scsi/scsicam.h> /* needed for scsicam_bios_param */ 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 transfered */ 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 u16 srb_count; 311 312 u8 sel_timeout; 313 314 unsigned int irq_level; 315 u8 tag_max_num; 316 u8 acb_flag; 317 u8 gmode2; 318 319 u8 config; 320 u8 lun_chk; 321 u8 scan_devices; 322 u8 hostid_bit; 323 324 u8 dcb_map[DC395x_MAX_SCSI_ID]; 325 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 326 327 struct pci_dev *dev; 328 329 u8 msg_len; 330 331 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 332 struct ScsiReqBlk srb; 333 334 struct NvRamType eeprom; /* eeprom settings for this adapter */ 335}; 336 337 338/*--------------------------------------------------------------------------- 339 Forward declarations 340 ---------------------------------------------------------------------------*/ 341static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 342 u16 *pscsi_status); 343static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 344 u16 *pscsi_status); 345static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 346 u16 *pscsi_status); 347static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 348 u16 *pscsi_status); 349static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 350 u16 *pscsi_status); 351static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 352 u16 *pscsi_status); 353static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 354 u16 *pscsi_status); 355static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 356 u16 *pscsi_status); 357static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 358 u16 *pscsi_status); 359static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 360 u16 *pscsi_status); 361static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 362 u16 *pscsi_status); 363static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 364 u16 *pscsi_status); 365static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 366 u16 *pscsi_status); 367static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 368 u16 *pscsi_status); 369static void set_basic_config(struct AdapterCtlBlk *acb); 370static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 371 struct ScsiReqBlk *srb); 372static void reset_scsi_bus(struct AdapterCtlBlk *acb); 373static void data_io_transfer(struct AdapterCtlBlk *acb, 374 struct ScsiReqBlk *srb, u16 io_dir); 375static void disconnect(struct AdapterCtlBlk *acb); 376static void reselect(struct AdapterCtlBlk *acb); 377static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 378 struct ScsiReqBlk *srb); 379static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 380 struct ScsiReqBlk *srb); 381static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 382 struct ScsiReqBlk *srb); 383static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 384 struct scsi_cmnd *cmd, u8 force); 385static void scsi_reset_detect(struct AdapterCtlBlk *acb); 386static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 387static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 388 struct ScsiReqBlk *srb); 389static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 390 struct ScsiReqBlk *srb); 391static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 392 struct ScsiReqBlk *srb); 393static void set_xfer_rate(struct AdapterCtlBlk *acb, 394 struct DeviceCtlBlk *dcb); 395static void waiting_timeout(unsigned long ptr); 396 397 398/*--------------------------------------------------------------------------- 399 Static Data 400 ---------------------------------------------------------------------------*/ 401static u16 current_sync_offset = 0; 402 403static void *dc395x_scsi_phase0[] = { 404 data_out_phase0,/* phase:0 */ 405 data_in_phase0, /* phase:1 */ 406 command_phase0, /* phase:2 */ 407 status_phase0, /* phase:3 */ 408 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 409 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 410 msgout_phase0, /* phase:6 */ 411 msgin_phase0, /* phase:7 */ 412}; 413 414static void *dc395x_scsi_phase1[] = { 415 data_out_phase1,/* phase:0 */ 416 data_in_phase1, /* phase:1 */ 417 command_phase1, /* phase:2 */ 418 status_phase1, /* phase:3 */ 419 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 420 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 421 msgout_phase1, /* phase:6 */ 422 msgin_phase1, /* phase:7 */ 423}; 424 425/* 426 *Fast20: 000 50ns, 20.0 MHz 427 * 001 75ns, 13.3 MHz 428 * 010 100ns, 10.0 MHz 429 * 011 125ns, 8.0 MHz 430 * 100 150ns, 6.6 MHz 431 * 101 175ns, 5.7 MHz 432 * 110 200ns, 5.0 MHz 433 * 111 250ns, 4.0 MHz 434 * 435 *Fast40(LVDS): 000 25ns, 40.0 MHz 436 * 001 50ns, 20.0 MHz 437 * 010 75ns, 13.3 MHz 438 * 011 100ns, 10.0 MHz 439 * 100 125ns, 8.0 MHz 440 * 101 150ns, 6.6 MHz 441 * 110 175ns, 5.7 MHz 442 * 111 200ns, 5.0 MHz 443 */ 444/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 445 446/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 447static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 448static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 449 450 451/*--------------------------------------------------------------------------- 452 Configuration 453 ---------------------------------------------------------------------------*/ 454/* 455 * Module/boot parameters currently effect *all* instances of the 456 * card in the system. 457 */ 458 459/* 460 * Command line parameters are stored in a structure below. 461 * These are the index's into the structure for the various 462 * command line options. 463 */ 464#define CFG_ADAPTER_ID 0 465#define CFG_MAX_SPEED 1 466#define CFG_DEV_MODE 2 467#define CFG_ADAPTER_MODE 3 468#define CFG_TAGS 4 469#define CFG_RESET_DELAY 5 470 471#define CFG_NUM 6 /* number of configuration items */ 472 473 474/* 475 * Value used to indicate that a command line override 476 * hasn't been used to modify the value. 477 */ 478#define CFG_PARAM_UNSET -1 479 480 481/* 482 * Hold command line parameters. 483 */ 484struct ParameterData { 485 int value; /* value of this setting */ 486 int min; /* minimum value */ 487 int max; /* maximum value */ 488 int def; /* default value */ 489 int safe; /* safe value */ 490}; 491static struct ParameterData __devinitdata cfg_data[] = { 492 { /* adapter id */ 493 CFG_PARAM_UNSET, 494 0, 495 15, 496 7, 497 7 498 }, 499 { /* max speed */ 500 CFG_PARAM_UNSET, 501 0, 502 7, 503 1, /* 13.3Mhz */ 504 4, /* 6.7Hmz */ 505 }, 506 { /* dev mode */ 507 CFG_PARAM_UNSET, 508 0, 509 0x3f, 510 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 511 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 512 NTC_DO_SEND_START, 513 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 514 }, 515 { /* adapter mode */ 516 CFG_PARAM_UNSET, 517 0, 518 0x2f, 519#ifdef CONFIG_SCSI_MULTI_LUN 520 NAC_SCANLUN | 521#endif 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 int 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 __devinit 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 __devinit 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 __devinitdata 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 __devinit 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 __devinit 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 __devinit 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 756static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) 757{ 758 struct list_head *head = &acb->srb_free_list; 759 struct ScsiReqBlk *srb = NULL; 760 761 if (!list_empty(head)) { 762 srb = list_entry(head->next, struct ScsiReqBlk, list); 763 list_del(head->next); 764 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); 765 } 766 return srb; 767} 768 769 770static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 771{ 772 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); 773 list_add_tail(&srb->list, &acb->srb_free_list); 774} 775 776 777static void srb_waiting_insert(struct DeviceCtlBlk *dcb, 778 struct ScsiReqBlk *srb) 779{ 780 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n", 781 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 782 list_add(&srb->list, &dcb->srb_waiting_list); 783} 784 785 786static void srb_waiting_append(struct DeviceCtlBlk *dcb, 787 struct ScsiReqBlk *srb) 788{ 789 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n", 790 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 791 list_add_tail(&srb->list, &dcb->srb_waiting_list); 792} 793 794 795static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 796{ 797 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n", 798 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 799 list_add_tail(&srb->list, &dcb->srb_going_list); 800} 801 802 803static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 804{ 805 struct ScsiReqBlk *i; 806 struct ScsiReqBlk *tmp; 807 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n", 808 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 809 810 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) 811 if (i == srb) { 812 list_del(&srb->list); 813 break; 814 } 815} 816 817 818static void srb_waiting_remove(struct DeviceCtlBlk *dcb, 819 struct ScsiReqBlk *srb) 820{ 821 struct ScsiReqBlk *i; 822 struct ScsiReqBlk *tmp; 823 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n", 824 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 825 826 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) 827 if (i == srb) { 828 list_del(&srb->list); 829 break; 830 } 831} 832 833 834static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, 835 struct ScsiReqBlk *srb) 836{ 837 dprintkdbg(DBG_0, 838 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n", 839 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 840 list_move(&srb->list, &dcb->srb_waiting_list); 841} 842 843 844static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, 845 struct ScsiReqBlk *srb) 846{ 847 dprintkdbg(DBG_0, 848 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n", 849 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 850 list_move(&srb->list, &dcb->srb_going_list); 851} 852 853 854/* Sets the timer to wake us up */ 855static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 856{ 857 if (timer_pending(&acb->waiting_timer)) 858 return; 859 init_timer(&acb->waiting_timer); 860 acb->waiting_timer.function = waiting_timeout; 861 acb->waiting_timer.data = (unsigned long) acb; 862 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) 863 acb->waiting_timer.expires = 864 acb->scsi_host->last_reset - HZ / 2 + 1; 865 else 866 acb->waiting_timer.expires = jiffies + to + 1; 867 add_timer(&acb->waiting_timer); 868} 869 870 871/* Send the next command from the waiting list to the bus */ 872static void waiting_process_next(struct AdapterCtlBlk *acb) 873{ 874 struct DeviceCtlBlk *start = NULL; 875 struct DeviceCtlBlk *pos; 876 struct DeviceCtlBlk *dcb; 877 struct ScsiReqBlk *srb; 878 struct list_head *dcb_list_head = &acb->dcb_list; 879 880 if (acb->active_dcb 881 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 882 return; 883 884 if (timer_pending(&acb->waiting_timer)) 885 del_timer(&acb->waiting_timer); 886 887 if (list_empty(dcb_list_head)) 888 return; 889 890 /* 891 * Find the starting dcb. Need to find it again in the list 892 * since the list may have changed since we set the ptr to it 893 */ 894 list_for_each_entry(dcb, dcb_list_head, list) 895 if (dcb == acb->dcb_run_robin) { 896 start = dcb; 897 break; 898 } 899 if (!start) { 900 /* This can happen! */ 901 start = list_entry(dcb_list_head->next, typeof(*start), list); 902 acb->dcb_run_robin = start; 903 } 904 905 906 /* 907 * Loop over the dcb, but we start somewhere (potentially) in 908 * the middle of the loop so we need to manully do this. 909 */ 910 pos = start; 911 do { 912 struct list_head *waiting_list_head = &pos->srb_waiting_list; 913 914 /* Make sure, the next another device gets scheduled ... */ 915 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 916 acb->dcb_run_robin); 917 918 if (list_empty(waiting_list_head) || 919 pos->max_command <= list_size(&pos->srb_going_list)) { 920 /* move to next dcb */ 921 pos = dcb_get_next(dcb_list_head, pos); 922 } else { 923 srb = list_entry(waiting_list_head->next, 924 struct ScsiReqBlk, list); 925 926 /* Try to send to the bus */ 927 if (!start_scsi(acb, pos, srb)) 928 srb_waiting_to_going_move(pos, srb); 929 else 930 waiting_set_timer(acb, HZ/50); 931 break; 932 } 933 } while (pos != start); 934} 935 936 937/* Wake up waiting queue */ 938static void waiting_timeout(unsigned long ptr) 939{ 940 unsigned long flags; 941 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 942 dprintkdbg(DBG_1, 943 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 944 DC395x_LOCK_IO(acb->scsi_host, flags); 945 waiting_process_next(acb); 946 DC395x_UNLOCK_IO(acb->scsi_host, flags); 947} 948 949 950/* Get the DCB for a given ID/LUN combination */ 951static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 952{ 953 return acb->children[id][lun]; 954} 955 956 957/* Send SCSI Request Block (srb) to adapter (acb) */ 958static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 959{ 960 struct DeviceCtlBlk *dcb = srb->dcb; 961 962 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 963 acb->active_dcb || 964 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 965 srb_waiting_append(dcb, srb); 966 waiting_process_next(acb); 967 return; 968 } 969 970 if (!start_scsi(acb, dcb, srb)) 971 srb_going_append(dcb, srb); 972 else { 973 srb_waiting_insert(dcb, srb); 974 waiting_set_timer(acb, HZ / 50); 975 } 976} 977 978/* Prepare SRB for being sent to Device DCB w/ command *cmd */ 979static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 980 struct ScsiReqBlk *srb) 981{ 982 int nseg; 983 enum dma_data_direction dir = cmd->sc_data_direction; 984 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", 985 cmd->serial_number, dcb->target_id, dcb->target_lun); 986 987 srb->dcb = dcb; 988 srb->cmd = cmd; 989 srb->sg_count = 0; 990 srb->total_xfer_length = 0; 991 srb->sg_bus_addr = 0; 992 srb->sg_index = 0; 993 srb->adapter_status = 0; 994 srb->target_status = 0; 995 srb->msg_count = 0; 996 srb->status = 0; 997 srb->flag = 0; 998 srb->state = 0; 999 srb->retry_count = 0; 1000 srb->tag_number = TAG_NONE; 1001 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1002 srb->end_message = 0; 1003 1004 nseg = scsi_dma_map(cmd); 1005 BUG_ON(nseg < 0); 1006 1007 if (dir == PCI_DMA_NONE || !nseg) { 1008 dprintkdbg(DBG_0, 1009 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1010 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), 1011 srb->segment_x[0].address); 1012 } else { 1013 int i; 1014 u32 reqlen = scsi_bufflen(cmd); 1015 struct scatterlist *sg; 1016 struct SGentry *sgp = srb->segment_x; 1017 1018 srb->sg_count = nseg; 1019 1020 dprintkdbg(DBG_0, 1021 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1022 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), 1023 srb->sg_count); 1024 1025 scsi_for_each_sg(cmd, sg, srb->sg_count, i) { 1026 u32 busaddr = (u32)sg_dma_address(sg); 1027 u32 seglen = (u32)sg->length; 1028 sgp[i].address = busaddr; 1029 sgp[i].length = seglen; 1030 srb->total_xfer_length += seglen; 1031 } 1032 sgp += srb->sg_count - 1; 1033 1034 /* 1035 * adjust last page if too big as it is allocated 1036 * on even page boundaries 1037 */ 1038 if (srb->total_xfer_length > reqlen) { 1039 sgp->length -= (srb->total_xfer_length - reqlen); 1040 srb->total_xfer_length = reqlen; 1041 } 1042 1043 /* Fixup for WIDE padding - make sure length is even */ 1044 if (dcb->sync_period & WIDE_SYNC && 1045 srb->total_xfer_length % 2) { 1046 srb->total_xfer_length++; 1047 sgp->length++; 1048 } 1049 1050 srb->sg_bus_addr = pci_map_single(dcb->acb->dev, 1051 srb->segment_x, 1052 SEGMENTX_LEN, 1053 PCI_DMA_TODEVICE); 1054 1055 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 1056 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 1057 } 1058 1059 srb->request_length = srb->total_xfer_length; 1060} 1061 1062 1063/** 1064 * dc395x_queue_command - queue scsi command passed from the mid 1065 * layer, invoke 'done' on completion 1066 * 1067 * @cmd: pointer to scsi command object 1068 * @done: function pointer to be invoked on completion 1069 * 1070 * Returns 1 if the adapter (host) is busy, else returns 0. One 1071 * reason for an adapter to be busy is that the number 1072 * of outstanding queued commands is already equal to 1073 * struct Scsi_Host::can_queue . 1074 * 1075 * Required: if struct Scsi_Host::can_queue is ever non-zero 1076 * then this function is required. 1077 * 1078 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1079 * and is expected to be held on return. 1080 * 1081 **/ 1082static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1083{ 1084 struct DeviceCtlBlk *dcb; 1085 struct ScsiReqBlk *srb; 1086 struct AdapterCtlBlk *acb = 1087 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1088 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", 1089 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 1090 1091 /* Assume BAD_TARGET; will be cleared later */ 1092 cmd->result = DID_BAD_TARGET << 16; 1093 1094 /* ignore invalid targets */ 1095 if (cmd->device->id >= acb->scsi_host->max_id || 1096 cmd->device->lun >= acb->scsi_host->max_lun || 1097 cmd->device->lun >31) { 1098 goto complete; 1099 } 1100 1101 /* does the specified lun on the specified device exist */ 1102 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1103 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1104 cmd->device->id, cmd->device->lun); 1105 goto complete; 1106 } 1107 1108 /* do we have a DCB for the device */ 1109 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1110 if (!dcb) { 1111 /* should never happen */ 1112 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1113 cmd->device->id, cmd->device->lun); 1114 goto complete; 1115 } 1116 1117 /* set callback and clear result in the command */ 1118 cmd->scsi_done = done; 1119 cmd->result = 0; 1120 1121 srb = srb_get_free(acb); 1122 if (!srb) 1123 { 1124 /* 1125 * Return 1 since we are unable to queue this command at this 1126 * point in time. 1127 */ 1128 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1129 return 1; 1130 } 1131 1132 build_srb(cmd, dcb, srb); 1133 1134 if (!list_empty(&dcb->srb_waiting_list)) { 1135 /* append to waiting queue */ 1136 srb_waiting_append(dcb, srb); 1137 waiting_process_next(acb); 1138 } else { 1139 /* process immediately */ 1140 send_srb(acb, srb); 1141 } 1142 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->serial_number); 1143 return 0; 1144 1145complete: 1146 /* 1147 * Complete the command immediatey, and then return 0 to 1148 * indicate that we have handled the command. This is usually 1149 * done when the commad is for things like non existent 1150 * devices. 1151 */ 1152 done(cmd); 1153 return 0; 1154} 1155 1156 1157/* 1158 * Return the disk geometry for the given SCSI device. 1159 */ 1160static int dc395x_bios_param(struct scsi_device *sdev, 1161 struct block_device *bdev, sector_t capacity, int *info) 1162{ 1163#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1164 int heads, sectors, cylinders; 1165 struct AdapterCtlBlk *acb; 1166 int size = capacity; 1167 1168 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1169 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1170 heads = 64; 1171 sectors = 32; 1172 cylinders = size / (heads * sectors); 1173 1174 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1175 heads = 255; 1176 sectors = 63; 1177 cylinders = size / (heads * sectors); 1178 } 1179 geom[0] = heads; 1180 geom[1] = sectors; 1181 geom[2] = cylinders; 1182 return 0; 1183#else 1184 return scsicam_bios_param(bdev, capacity, info); 1185#endif 1186} 1187 1188 1189static void dump_register_info(struct AdapterCtlBlk *acb, 1190 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1191{ 1192 u16 pstat; 1193 struct pci_dev *dev = acb->dev; 1194 pci_read_config_word(dev, PCI_STATUS, &pstat); 1195 if (!dcb) 1196 dcb = acb->active_dcb; 1197 if (!srb && dcb) 1198 srb = dcb->active_srb; 1199 if (srb) { 1200 if (!srb->cmd) 1201 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1202 srb, srb->cmd); 1203 else 1204 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " 1205 "cmnd=0x%02x <%02i-%i>\n", 1206 srb, srb->cmd, srb->cmd->serial_number, 1207 srb->cmd->cmnd[0], srb->cmd->device->id, 1208 srb->cmd->device->lun); 1209 printk(" sglist=%p cnt=%i idx=%i len=%zu\n", 1210 srb->segment_x, srb->sg_count, srb->sg_index, 1211 srb->total_xfer_length); 1212 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1213 srb->state, srb->status, srb->scsi_phase, 1214 (acb->active_dcb) ? "" : "not"); 1215 } 1216 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1217 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1218 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1219 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1220 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1221 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1222 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1223 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1224 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1225 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1226 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1227 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1228 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1229 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1230 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1231 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1232 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1233 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1234 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1235 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1236 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1237 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1238 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1239 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1240 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1241 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1242 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1243 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1244 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1245 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1246 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1247 "pci{status=0x%04x}\n", 1248 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1249 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1250 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1251 pstat); 1252} 1253 1254 1255static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1256{ 1257#if debug_enabled(DBG_FIFO) 1258 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1259 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1260 if (!(fifocnt & 0x40)) 1261 dprintkdbg(DBG_FIFO, 1262 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1263 fifocnt & 0x3f, lines, txt); 1264#endif 1265 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1266} 1267 1268 1269static void reset_dev_param(struct AdapterCtlBlk *acb) 1270{ 1271 struct DeviceCtlBlk *dcb; 1272 struct NvRamType *eeprom = &acb->eeprom; 1273 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1274 1275 list_for_each_entry(dcb, &acb->dcb_list, list) { 1276 u8 period_index; 1277 1278 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1279 dcb->sync_period = 0; 1280 dcb->sync_offset = 0; 1281 1282 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1283 period_index = eeprom->target[dcb->target_id].period & 0x07; 1284 dcb->min_nego_period = clock_period[period_index]; 1285 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1286 || !(acb->config & HCC_WIDE_CARD)) 1287 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1288 } 1289} 1290 1291 1292/* 1293 * perform a hard reset on the SCSI bus 1294 * @cmd - some command for this host (for fetching hooks) 1295 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1296 */ 1297static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1298{ 1299 struct AdapterCtlBlk *acb = 1300 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1301 dprintkl(KERN_INFO, 1302 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", 1303 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd); 1304 1305 if (timer_pending(&acb->waiting_timer)) 1306 del_timer(&acb->waiting_timer); 1307 1308 /* 1309 * disable interrupt 1310 */ 1311 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1312 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1313 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1314 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1315 1316 reset_scsi_bus(acb); 1317 udelay(500); 1318 1319 /* We may be in serious trouble. Wait some seconds */ 1320 acb->scsi_host->last_reset = 1321 jiffies + 3 * HZ / 2 + 1322 HZ * acb->eeprom.delay_time; 1323 1324 /* 1325 * re-enable interrupt 1326 */ 1327 /* Clear SCSI FIFO */ 1328 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1329 clear_fifo(acb, "eh_bus_reset"); 1330 /* Delete pending IRQ */ 1331 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1332 set_basic_config(acb); 1333 1334 reset_dev_param(acb); 1335 doing_srb_done(acb, DID_RESET, cmd, 0); 1336 acb->active_dcb = NULL; 1337 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1338 waiting_process_next(acb); 1339 1340 return SUCCESS; 1341} 1342 1343static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1344{ 1345 int rc; 1346 1347 spin_lock_irq(cmd->device->host->host_lock); 1348 rc = __dc395x_eh_bus_reset(cmd); 1349 spin_unlock_irq(cmd->device->host->host_lock); 1350 1351 return rc; 1352} 1353 1354/* 1355 * abort an errant SCSI command 1356 * @cmd - command to be aborted 1357 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1358 */ 1359static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1360{ 1361 /* 1362 * Look into our command queues: If it has not been sent already, 1363 * we remove it and return success. Otherwise fail. 1364 */ 1365 struct AdapterCtlBlk *acb = 1366 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1367 struct DeviceCtlBlk *dcb; 1368 struct ScsiReqBlk *srb; 1369 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", 1370 cmd->serial_number, cmd->device->id, cmd->device->lun, cmd); 1371 1372 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1373 if (!dcb) { 1374 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1375 return FAILED; 1376 } 1377 1378 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1379 if (srb) { 1380 srb_waiting_remove(dcb, srb); 1381 pci_unmap_srb_sense(acb, srb); 1382 pci_unmap_srb(acb, srb); 1383 free_tag(dcb, srb); 1384 srb_free_insert(acb, srb); 1385 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1386 cmd->result = DID_ABORT << 16; 1387 return SUCCESS; 1388 } 1389 srb = find_cmd(cmd, &dcb->srb_going_list); 1390 if (srb) { 1391 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); 1392 /* XXX: Should abort the command here */ 1393 } else { 1394 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); 1395 } 1396 return FAILED; 1397} 1398 1399 1400/* SDTR */ 1401static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1402 struct ScsiReqBlk *srb) 1403{ 1404 u8 *ptr = srb->msgout_buf + srb->msg_count; 1405 if (srb->msg_count > 1) { 1406 dprintkl(KERN_INFO, 1407 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1408 srb->msg_count, srb->msgout_buf[0], 1409 srb->msgout_buf[1]); 1410 return; 1411 } 1412 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1413 dcb->sync_offset = 0; 1414 dcb->min_nego_period = 200 >> 2; 1415 } else if (dcb->sync_offset == 0) 1416 dcb->sync_offset = SYNC_NEGO_OFFSET; 1417 1418 *ptr++ = MSG_EXTENDED; /* (01h) */ 1419 *ptr++ = 3; /* length */ 1420 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1421 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1422 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1423 srb->msg_count += 5; 1424 srb->state |= SRB_DO_SYNC_NEGO; 1425} 1426 1427 1428/* WDTR */ 1429static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1430 struct ScsiReqBlk *srb) 1431{ 1432 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1433 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1434 u8 *ptr = srb->msgout_buf + srb->msg_count; 1435 if (srb->msg_count > 1) { 1436 dprintkl(KERN_INFO, 1437 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1438 srb->msg_count, srb->msgout_buf[0], 1439 srb->msgout_buf[1]); 1440 return; 1441 } 1442 *ptr++ = MSG_EXTENDED; /* (01h) */ 1443 *ptr++ = 2; /* length */ 1444 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1445 *ptr++ = wide; 1446 srb->msg_count += 4; 1447 srb->state |= SRB_DO_WIDE_NEGO; 1448} 1449 1450 1451#if 0 1452/* Timer to work around chip flaw: When selecting and the bus is 1453 * busy, we sometimes miss a Selection timeout IRQ */ 1454void selection_timeout_missed(unsigned long ptr); 1455/* Sets the timer to wake us up */ 1456static void selto_timer(struct AdapterCtlBlk *acb) 1457{ 1458 if (timer_pending(&acb->selto_timer)) 1459 return; 1460 acb->selto_timer.function = selection_timeout_missed; 1461 acb->selto_timer.data = (unsigned long) acb; 1462 if (time_before 1463 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) 1464 acb->selto_timer.expires = 1465 acb->scsi_host->last_reset + HZ / 2 + 1; 1466 else 1467 acb->selto_timer.expires = jiffies + HZ + 1; 1468 add_timer(&acb->selto_timer); 1469} 1470 1471 1472void selection_timeout_missed(unsigned long ptr) 1473{ 1474 unsigned long flags; 1475 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1476 struct ScsiReqBlk *srb; 1477 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1478 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1479 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1480 return; 1481 } 1482 DC395x_LOCK_IO(acb->scsi_host, flags); 1483 srb = acb->active_dcb->active_srb; 1484 disconnect(acb); 1485 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1486} 1487#endif 1488 1489 1490static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1491 struct ScsiReqBlk* srb) 1492{ 1493 u16 s_stat2, return_code; 1494 u8 s_stat, scsicommand, i, identify_message; 1495 u8 *ptr; 1496 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", 1497 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb); 1498 1499 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1500 1501 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1502 s_stat2 = 0; 1503 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1504#if 1 1505 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1506 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", 1507 srb->cmd->serial_number, s_stat, s_stat2); 1508 /* 1509 * Try anyway? 1510 * 1511 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1512 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! 1513 * (This is likely to be a bug in the hardware. Obviously, most people 1514 * only have one initiator per SCSI bus.) 1515 * Instead let this fail and have the timer make sure the command is 1516 * tried again after a short time 1517 */ 1518 /*selto_timer (acb); */ 1519 return 1; 1520 } 1521#endif 1522 if (acb->active_dcb) { 1523 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" 1524 "command while another command (pid#%li) is active.", 1525 srb->cmd->serial_number, 1526 acb->active_dcb->active_srb ? 1527 acb->active_dcb->active_srb->cmd->serial_number : 0); 1528 return 1; 1529 } 1530 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1531 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", 1532 srb->cmd->serial_number); 1533 return 1; 1534 } 1535 /* Allow starting of SCSI commands half a second before we allow the mid-level 1536 * to queue them again after a reset */ 1537 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { 1538 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1539 return 1; 1540 } 1541 1542 /* Flush FIFO */ 1543 clear_fifo(acb, "start_scsi"); 1544 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1545 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1546 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1547 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1548 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1549 1550 identify_message = dcb->identify_msg; 1551 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1552 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1553 if (srb->flag & AUTO_REQSENSE) 1554 identify_message &= 0xBF; 1555 1556 if (((srb->cmd->cmnd[0] == INQUIRY) 1557 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1558 || (srb->flag & AUTO_REQSENSE)) 1559 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1560 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1561 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1562 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1563 && (dcb->target_lun == 0)) { 1564 srb->msgout_buf[0] = identify_message; 1565 srb->msg_count = 1; 1566 scsicommand = SCMD_SEL_ATNSTOP; 1567 srb->state = SRB_MSGOUT; 1568#ifndef SYNC_FIRST 1569 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1570 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1571 build_wdtr(acb, dcb, srb); 1572 goto no_cmd; 1573 } 1574#endif 1575 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1576 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1577 build_sdtr(acb, dcb, srb); 1578 goto no_cmd; 1579 } 1580 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1581 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1582 build_wdtr(acb, dcb, srb); 1583 goto no_cmd; 1584 } 1585 srb->msg_count = 0; 1586 } 1587 /* Send identify message */ 1588 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1589 1590 scsicommand = SCMD_SEL_ATN; 1591 srb->state = SRB_START_; 1592#ifndef DC395x_NO_TAGQ 1593 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1594 && (identify_message & 0xC0)) { 1595 /* Send Tag message */ 1596 u32 tag_mask = 1; 1597 u8 tag_number = 0; 1598 while (tag_mask & dcb->tag_mask 1599 && tag_number <= dcb->max_command) { 1600 tag_mask = tag_mask << 1; 1601 tag_number++; 1602 } 1603 if (tag_number >= dcb->max_command) { 1604 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " 1605 "Out of tags target=<%02i-%i>)\n", 1606 srb->cmd->serial_number, srb->cmd->device->id, 1607 srb->cmd->device->lun); 1608 srb->state = SRB_READY; 1609 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1610 DO_HWRESELECT); 1611 return 1; 1612 } 1613 /* Send Tag id */ 1614 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1615 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1616 dcb->tag_mask |= tag_mask; 1617 srb->tag_number = tag_number; 1618 scsicommand = SCMD_SEL_ATN3; 1619 srb->state = SRB_START_; 1620 } 1621#endif 1622/*polling:*/ 1623 /* Send CDB ..command block ......... */ 1624 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", 1625 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun, 1626 srb->cmd->cmnd[0], srb->tag_number); 1627 if (srb->flag & AUTO_REQSENSE) { 1628 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1634 } else { 1635 ptr = (u8 *)srb->cmd->cmnd; 1636 for (i = 0; i < srb->cmd->cmd_len; i++) 1637 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1638 } 1639 no_cmd: 1640 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1641 DO_HWRESELECT | DO_DATALATCH); 1642 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1643 /* 1644 * If start_scsi return 1: 1645 * we caught an interrupt (must be reset or reselection ... ) 1646 * : Let's process it first! 1647 */ 1648 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", 1649 srb->cmd->serial_number, dcb->target_id, dcb->target_lun); 1650 srb->state = SRB_READY; 1651 free_tag(dcb, srb); 1652 srb->msg_count = 0; 1653 return_code = 1; 1654 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1655 } else { 1656 /* 1657 * If start_scsi returns 0: 1658 * we know that the SCSI processor is free 1659 */ 1660 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1661 dcb->active_srb = srb; 1662 acb->active_dcb = dcb; 1663 return_code = 0; 1664 /* it's important for atn stop */ 1665 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1666 DO_DATALATCH | DO_HWRESELECT); 1667 /* SCSI command */ 1668 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1669 } 1670 return return_code; 1671} 1672 1673 1674#define DC395x_ENABLE_MSGOUT \ 1675 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1676 srb->state |= SRB_MSGOUT 1677 1678 1679/* abort command */ 1680static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1681 struct ScsiReqBlk *srb) 1682{ 1683 srb->msgout_buf[0] = ABORT; 1684 srb->msg_count = 1; 1685 DC395x_ENABLE_MSGOUT; 1686 srb->state &= ~SRB_MSGIN; 1687 srb->state |= SRB_MSGOUT; 1688} 1689 1690 1691/** 1692 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1693 * have been triggered for this card. 1694 * 1695 * @acb: a pointer to the adpter control block 1696 * @scsi_status: the status return when we checked the card 1697 **/ 1698static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1699 u16 scsi_status) 1700{ 1701 struct DeviceCtlBlk *dcb; 1702 struct ScsiReqBlk *srb; 1703 u16 phase; 1704 u8 scsi_intstatus; 1705 unsigned long flags; 1706 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1707 u16 *); 1708 1709 DC395x_LOCK_IO(acb->scsi_host, flags); 1710 1711 /* This acknowledges the IRQ */ 1712 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1713 if ((scsi_status & 0x2007) == 0x2002) 1714 dprintkl(KERN_DEBUG, 1715 "COP after COP completed? %04x\n", scsi_status); 1716 if (debug_enabled(DBG_KG)) { 1717 if (scsi_intstatus & INT_SELTIMEOUT) 1718 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1719 } 1720 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1721 1722 if (timer_pending(&acb->selto_timer)) 1723 del_timer(&acb->selto_timer); 1724 1725 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1726 disconnect(acb); /* bus free interrupt */ 1727 goto out_unlock; 1728 } 1729 if (scsi_intstatus & INT_RESELECTED) { 1730 reselect(acb); 1731 goto out_unlock; 1732 } 1733 if (scsi_intstatus & INT_SELECT) { 1734 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1735 goto out_unlock; 1736 } 1737 if (scsi_intstatus & INT_SCSIRESET) { 1738 scsi_reset_detect(acb); 1739 goto out_unlock; 1740 } 1741 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1742 dcb = acb->active_dcb; 1743 if (!dcb) { 1744 dprintkl(KERN_DEBUG, 1745 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1746 scsi_status, scsi_intstatus); 1747 goto out_unlock; 1748 } 1749 srb = dcb->active_srb; 1750 if (dcb->flag & ABORT_DEV_) { 1751 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1752 enable_msgout_abort(acb, srb); 1753 } 1754 1755 /* software sequential machine */ 1756 phase = (u16)srb->scsi_phase; 1757 1758 /* 1759 * 62037 or 62137 1760 * call dc395x_scsi_phase0[]... "phase entry" 1761 * handle every phase before start transfer 1762 */ 1763 /* data_out_phase0, phase:0 */ 1764 /* data_in_phase0, phase:1 */ 1765 /* command_phase0, phase:2 */ 1766 /* status_phase0, phase:3 */ 1767 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1768 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1769 /* msgout_phase0, phase:6 */ 1770 /* msgin_phase0, phase:7 */ 1771 dc395x_statev = dc395x_scsi_phase0[phase]; 1772 dc395x_statev(acb, srb, &scsi_status); 1773 1774 /* 1775 * if there were any exception occured scsi_status 1776 * will be modify to bus free phase new scsi_status 1777 * transfer out from ... previous dc395x_statev 1778 */ 1779 srb->scsi_phase = scsi_status & PHASEMASK; 1780 phase = (u16)scsi_status & PHASEMASK; 1781 1782 /* 1783 * call dc395x_scsi_phase1[]... "phase entry" handle 1784 * every phase to do transfer 1785 */ 1786 /* data_out_phase1, phase:0 */ 1787 /* data_in_phase1, phase:1 */ 1788 /* command_phase1, phase:2 */ 1789 /* status_phase1, phase:3 */ 1790 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1791 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1792 /* msgout_phase1, phase:6 */ 1793 /* msgin_phase1, phase:7 */ 1794 dc395x_statev = dc395x_scsi_phase1[phase]; 1795 dc395x_statev(acb, srb, &scsi_status); 1796 } 1797 out_unlock: 1798 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1799} 1800 1801 1802static irqreturn_t dc395x_interrupt(int irq, void *dev_id) 1803{ 1804 struct AdapterCtlBlk *acb = dev_id; 1805 u16 scsi_status; 1806 u8 dma_status; 1807 irqreturn_t handled = IRQ_NONE; 1808 1809 /* 1810 * Check for pending interrupt 1811 */ 1812 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1813 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1814 if (scsi_status & SCSIINTERRUPT) { 1815 /* interrupt pending - let's process it! */ 1816 dc395x_handle_interrupt(acb, scsi_status); 1817 handled = IRQ_HANDLED; 1818 } 1819 else if (dma_status & 0x20) { 1820 /* Error from the DMA engine */ 1821 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1822#if 0 1823 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1824 if (acb->active_dcb) { 1825 acb->active_dcb-> flag |= ABORT_DEV_; 1826 if (acb->active_dcb->active_srb) 1827 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1828 } 1829 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1830#else 1831 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1832 acb = NULL; 1833#endif 1834 handled = IRQ_HANDLED; 1835 } 1836 1837 return handled; 1838} 1839 1840 1841static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1842 u16 *pscsi_status) 1843{ 1844 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->serial_number); 1845 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1846 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1847 1848 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1849 srb->state &= ~SRB_MSGOUT; 1850} 1851 1852 1853static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1854 u16 *pscsi_status) 1855{ 1856 u16 i; 1857 u8 *ptr; 1858 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->serial_number); 1859 1860 clear_fifo(acb, "msgout_phase1"); 1861 if (!(srb->state & SRB_MSGOUT)) { 1862 srb->state |= SRB_MSGOUT; 1863 dprintkl(KERN_DEBUG, 1864 "msgout_phase1: (pid#%li) Phase unexpected\n", 1865 srb->cmd->serial_number); /* So what ? */ 1866 } 1867 if (!srb->msg_count) { 1868 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", 1869 srb->cmd->serial_number); 1870 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1871 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1872 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1873 return; 1874 } 1875 ptr = (u8 *)srb->msgout_buf; 1876 for (i = 0; i < srb->msg_count; i++) 1877 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1878 srb->msg_count = 0; 1879 if (srb->msgout_buf[0] == MSG_ABORT) 1880 srb->state = SRB_ABORT_SENT; 1881 1882 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1883} 1884 1885 1886static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1887 u16 *pscsi_status) 1888{ 1889 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->serial_number); 1890 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1891} 1892 1893 1894static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1895 u16 *pscsi_status) 1896{ 1897 struct DeviceCtlBlk *dcb; 1898 u8 *ptr; 1899 u16 i; 1900 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->serial_number); 1901 1902 clear_fifo(acb, "command_phase1"); 1903 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1904 if (!(srb->flag & AUTO_REQSENSE)) { 1905 ptr = (u8 *)srb->cmd->cmnd; 1906 for (i = 0; i < srb->cmd->cmd_len; i++) { 1907 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1908 ptr++; 1909 } 1910 } else { 1911 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1912 dcb = acb->active_dcb; 1913 /* target id */ 1914 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1919 } 1920 srb->state |= SRB_COMMAND; 1921 /* it's important for atn stop */ 1922 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1923 /* SCSI command */ 1924 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1925} 1926 1927 1928/* 1929 * Verify that the remaining space in the hw sg lists is the same as 1930 * the count of remaining bytes in srb->total_xfer_length 1931 */ 1932static void sg_verify_length(struct ScsiReqBlk *srb) 1933{ 1934 if (debug_enabled(DBG_SG)) { 1935 unsigned len = 0; 1936 unsigned idx = srb->sg_index; 1937 struct SGentry *psge = srb->segment_x + idx; 1938 for (; idx < srb->sg_count; psge++, idx++) 1939 len += psge->length; 1940 if (len != srb->total_xfer_length) 1941 dprintkdbg(DBG_SG, 1942 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1943 srb->total_xfer_length, len); 1944 } 1945} 1946 1947 1948/* 1949 * Compute the next Scatter Gather list index and adjust its length 1950 * and address if necessary 1951 */ 1952static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1953{ 1954 u8 idx; 1955 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ 1956 struct SGentry *psge = srb->segment_x + srb->sg_index; 1957 1958 dprintkdbg(DBG_0, 1959 "sg_update_list: Transfered %i of %i bytes, %i remain\n", 1960 xferred, srb->total_xfer_length, left); 1961 if (xferred == 0) { 1962 /* nothing to update since we did not transfer any data */ 1963 return; 1964 } 1965 1966 sg_verify_length(srb); 1967 srb->total_xfer_length = left; /* update remaining count */ 1968 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1969 if (xferred >= psge->length) { 1970 /* Complete SG entries done */ 1971 xferred -= psge->length; 1972 } else { 1973 /* Partial SG entry done */ 1974 psge->length -= xferred; 1975 psge->address += xferred; 1976 srb->sg_index = idx; 1977 pci_dma_sync_single_for_device(srb->dcb-> 1978 acb->dev, 1979 srb->sg_bus_addr, 1980 SEGMENTX_LEN, 1981 PCI_DMA_TODEVICE); 1982 break; 1983 } 1984 psge++; 1985 } 1986 sg_verify_length(srb); 1987} 1988 1989 1990/* 1991 * We have transfered a single byte (PIO mode?) and need to update 1992 * the count of bytes remaining (total_xfer_length) and update the sg 1993 * entry to either point to next byte in the current sg entry, or of 1994 * already at the end to point to the start of the next sg entry 1995 */ 1996static void sg_subtract_one(struct ScsiReqBlk *srb) 1997{ 1998 sg_update_list(srb, srb->total_xfer_length - 1); 1999} 2000 2001 2002/* 2003 * cleanup_after_transfer 2004 * 2005 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2006 * KG: Currently called from StatusPhase1 () 2007 * Should probably also be called from other places 2008 * Best might be to call it in DataXXPhase0, if new phase will differ 2009 */ 2010static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2011 struct ScsiReqBlk *srb) 2012{ 2013 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2014 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2015 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2016 clear_fifo(acb, "cleanup/in"); 2017 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2018 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2019 } else { /* write */ 2020 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2021 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2022 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2023 clear_fifo(acb, "cleanup/out"); 2024 } 2025 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2026} 2027 2028 2029/* 2030 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO 2031 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2032 */ 2033#define DC395x_LASTPIO 4 2034 2035 2036static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2037 u16 *pscsi_status) 2038{ 2039 struct DeviceCtlBlk *dcb = srb->dcb; 2040 u16 scsi_status = *pscsi_status; 2041 u32 d_left_counter = 0; 2042 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", 2043 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2044 2045 /* 2046 * KG: We need to drain the buffers before we draw any conclusions! 2047 * This means telling the DMA to push the rest into SCSI, telling 2048 * SCSI to push the rest to the bus. 2049 * However, the device might have been the one to stop us (phase 2050 * change), and the data in transit just needs to be accounted so 2051 * it can be retransmitted.) 2052 */ 2053 /* 2054 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2055 * If we need more data, the DMA SG list will be freshly set up, anyway 2056 */ 2057 dprintkdbg(DBG_PIO, "data_out_phase0: " 2058 "DMA{fifocnt=0x%02x fifostat=0x%02x} " 2059 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2060 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2061 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2062 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2063 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2064 srb->total_xfer_length); 2065 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2066 2067 if (!(srb->state & SRB_XFERPAD)) { 2068 if (scsi_status & PARITYERROR) 2069 srb->status |= PARITY_ERROR; 2070 2071 /* 2072 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2073 * is the no of bytes it got from the DMA engine not the no it 2074 * transferred successfully to the device. (And the difference could 2075 * be as much as the FIFO size, I guess ...) 2076 */ 2077 if (!(scsi_status & SCSIXFERDONE)) { 2078 /* 2079 * when data transfer from DMA FIFO to SCSI FIFO 2080 * if there was some data left in SCSI FIFO 2081 */ 2082 d_left_counter = 2083 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2084 0x1F); 2085 if (dcb->sync_period & WIDE_SYNC) 2086 d_left_counter <<= 1; 2087 2088 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2089 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2090 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2091 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2092 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2093 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2094 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2095 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2097 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2098 } 2099 /* 2100 * calculate all the residue data that not yet tranfered 2101 * SCSI transfer counter + left in SCSI FIFO data 2102 * 2103 * .....TRM_S1040_SCSI_COUNTER (24bits) 2104 * The counter always decrement by one for every SCSI byte transfer. 2105 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2106 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2107 */ 2108 if (srb->total_xfer_length > DC395x_LASTPIO) 2109 d_left_counter += 2110 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2111 2112 /* Is this a good idea? */ 2113 /*clear_fifo(acb, "DOP1"); */ 2114 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2115 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2116 && scsi_bufflen(srb->cmd) % 2) { 2117 d_left_counter = 0; 2118 dprintkl(KERN_INFO, 2119 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2120 scsi_status); 2121 } 2122 /* 2123 * KG: Oops again. Same thinko as above: The SCSI might have been 2124 * faster than the DMA engine, so that it ran out of data. 2125 * In that case, we have to do just nothing! 2126 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2127 */ 2128 /* 2129 * KG: This is nonsense: We have been WRITING data to the bus 2130 * If the SCSI engine has no bytes left, how should the DMA engine? 2131 */ 2132 if (d_left_counter == 0) { 2133 srb->total_xfer_length = 0; 2134 } else { 2135 /* 2136 * if transfer not yet complete 2137 * there were some data residue in SCSI FIFO or 2138 * SCSI transfer counter not empty 2139 */ 2140 long oldxferred = 2141 srb->total_xfer_length - d_left_counter; 2142 const int diff = 2143 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2144 sg_update_list(srb, d_left_counter); 2145 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2146 if ((srb->segment_x[srb->sg_index].length == 2147 diff && scsi_sg_count(srb->cmd)) 2148 || ((oldxferred & ~PAGE_MASK) == 2149 (PAGE_SIZE - diff)) 2150 ) { 2151 dprintkl(KERN_INFO, "data_out_phase0: " 2152 "Work around chip bug (%i)?\n", diff); 2153 d_left_counter = 2154 srb->total_xfer_length - diff; 2155 sg_update_list(srb, d_left_counter); 2156 /*srb->total_xfer_length -= diff; */ 2157 /*srb->virt_addr += diff; */ 2158 /*if (srb->cmd->use_sg) */ 2159 /* srb->sg_index++; */ 2160 } 2161 } 2162 } 2163 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2164 cleanup_after_transfer(acb, srb); 2165 } 2166} 2167 2168 2169static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2170 u16 *pscsi_status) 2171{ 2172 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", 2173 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2174 clear_fifo(acb, "data_out_phase1"); 2175 /* do prepare before transfer when data out phase */ 2176 data_io_transfer(acb, srb, XFERDATAOUT); 2177} 2178 2179static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2180 u16 *pscsi_status) 2181{ 2182 u16 scsi_status = *pscsi_status; 2183 2184 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", 2185 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2186 2187 /* 2188 * KG: DataIn is much more tricky than DataOut. When the device is finished 2189 * and switches to another phase, the SCSI engine should be finished too. 2190 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2191 * engine and transferred to memory. 2192 * We should wait for the FIFOs to be emptied by that (is there any way to 2193 * enforce this?) and then stop the DMA engine, because it might think, that 2194 * there are more bytes to follow. Yes, the device might disconnect prior to 2195 * having all bytes transferred! 2196 * Also we should make sure that all data from the DMA engine buffer's really 2197 * made its way to the system memory! Some documentation on this would not 2198 * seem to be a bad idea, actually. 2199 */ 2200 if (!(srb->state & SRB_XFERPAD)) { 2201 u32 d_left_counter; 2202 unsigned int sc, fc; 2203 2204 if (scsi_status & PARITYERROR) { 2205 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " 2206 "Parity Error\n", srb->cmd->serial_number); 2207 srb->status |= PARITY_ERROR; 2208 } 2209 /* 2210 * KG: We should wait for the DMA FIFO to be empty ... 2211 * but: it would be better to wait first for the SCSI FIFO and then the 2212 * the DMA FIFO to become empty? How do we know, that the device not already 2213 * sent data to the FIFO in a MsgIn phase, eg.? 2214 */ 2215 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2216#if 0 2217 int ctr = 6000000; 2218 dprintkl(KERN_DEBUG, 2219 "DIP0: Wait for DMA FIFO to flush ...\n"); 2220 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2221 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2222 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2223 while (! 2224 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2225 0x80) && --ctr); 2226 if (ctr < 6000000 - 1) 2227 dprintkl(KERN_DEBUG 2228 "DIP0: Had to wait for DMA ...\n"); 2229 if (!ctr) 2230 dprintkl(KERN_ERR, 2231 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2232 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2233#endif 2234 dprintkdbg(DBG_KG, "data_in_phase0: " 2235 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2236 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2237 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2238 } 2239 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2240 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2241 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2242 d_left_counter = sc + ((fc & 0x1f) 2243 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2244 0)); 2245 dprintkdbg(DBG_KG, "data_in_phase0: " 2246 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2247 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2248 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2249 fc, 2250 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2251 sc, 2252 fc, 2253 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2254 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2255 srb->total_xfer_length, d_left_counter); 2256#if DC395x_LASTPIO 2257 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ 2258 if (d_left_counter 2259 && srb->total_xfer_length <= DC395x_LASTPIO) { 2260 size_t left_io = srb->total_xfer_length; 2261 2262 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2263 /*sg_update_list (srb, d_left_counter); */ 2264 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " 2265 "for remaining %i bytes:", 2266 fc & 0x1f, 2267 (srb->dcb->sync_period & WIDE_SYNC) ? 2268 "words" : "bytes", 2269 srb->total_xfer_length); 2270 if (srb->dcb->sync_period & WIDE_SYNC) 2271 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2272 CFG2_WIDEFIFO); 2273 while (left_io) { 2274 unsigned char *virt, *base = NULL; 2275 unsigned long flags = 0; 2276 size_t len = left_io; 2277 size_t offset = srb->request_length - left_io; 2278 2279 local_irq_save(flags); 2280 /* Assumption: it's inside one page as it's at most 4 bytes and 2281 I just assume it's on a 4-byte boundary */ 2282 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2283 srb->sg_count, &offset, &len); 2284 virt = base + offset; 2285 2286 left_io -= len; 2287 2288 while (len) { 2289 u8 byte; 2290 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2291 *virt++ = byte; 2292 2293 if (debug_enabled(DBG_PIO)) 2294 printk(" %02x", byte); 2295 2296 d_left_counter--; 2297 sg_subtract_one(srb); 2298 2299 len--; 2300 2301 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2302 2303 if (fc == 0x40) { 2304 left_io = 0; 2305 break; 2306 } 2307 } 2308 2309 WARN_ON((fc != 0x40) == !d_left_counter); 2310 2311 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { 2312 /* Read the last byte ... */ 2313 if (srb->total_xfer_length > 0) { 2314 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2315 2316 *virt++ = byte; 2317 srb->total_xfer_length--; 2318 if (debug_enabled(DBG_PIO)) 2319 printk(" %02x", byte); 2320 } 2321 2322 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2323 } 2324 2325 scsi_kunmap_atomic_sg(base); 2326 local_irq_restore(flags); 2327 } 2328 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2329 /*srb->total_xfer_length = 0; */ 2330 if (debug_enabled(DBG_PIO)) 2331 printk("\n"); 2332 } 2333#endif /* DC395x_LASTPIO */ 2334 2335#if 0 2336 /* 2337 * KG: This was in DATAOUT. Does it also belong here? 2338 * Nobody seems to know what counter and fifo_cnt count exactly ... 2339 */ 2340 if (!(scsi_status & SCSIXFERDONE)) { 2341 /* 2342 * when data transfer from DMA FIFO to SCSI FIFO 2343 * if there was some data left in SCSI FIFO 2344 */ 2345 d_left_counter = 2346 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2347 0x1F); 2348 if (srb->dcb->sync_period & WIDE_SYNC) 2349 d_left_counter <<= 1; 2350 /* 2351 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2352 * so need to *= 2 2353 * KG: Seems to be correct ... 2354 */ 2355 } 2356#endif 2357 /* KG: This should not be needed any more! */ 2358 if (d_left_counter == 0 2359 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2360#if 0 2361 int ctr = 6000000; 2362 u8 TempDMAstatus; 2363 do { 2364 TempDMAstatus = 2365 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2366 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2367 if (!ctr) 2368 dprintkl(KERN_ERR, 2369 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2370 srb->total_xfer_length = 0; 2371#endif 2372 srb->total_xfer_length = d_left_counter; 2373 } else { /* phase changed */ 2374 /* 2375 * parsing the case: 2376 * when a transfer not yet complete 2377 * but be disconnected by target 2378 * if transfer not yet complete 2379 * there were some data residue in SCSI FIFO or 2380 * SCSI transfer counter not empty 2381 */ 2382 sg_update_list(srb, d_left_counter); 2383 } 2384 } 2385 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2386 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2387 cleanup_after_transfer(acb, srb); 2388 } 2389} 2390 2391 2392static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2393 u16 *pscsi_status) 2394{ 2395 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", 2396 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2397 data_io_transfer(acb, srb, XFERDATAIN); 2398} 2399 2400 2401static void data_io_transfer(struct AdapterCtlBlk *acb, 2402 struct ScsiReqBlk *srb, u16 io_dir) 2403{ 2404 struct DeviceCtlBlk *dcb = srb->dcb; 2405 u8 bval; 2406 dprintkdbg(DBG_0, 2407 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2408 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun, 2409 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2410 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2411 if (srb == acb->tmp_srb) 2412 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2413 if (srb->sg_index >= srb->sg_count) { 2414 /* can't happen? out of bounds error */ 2415 return; 2416 } 2417 2418 if (srb->total_xfer_length > DC395x_LASTPIO) { 2419 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2420 /* 2421 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2422 * Maybe, even ABORTXFER would be appropriate 2423 */ 2424 if (dma_status & XFERPENDING) { 2425 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2426 "Expect trouble!\n"); 2427 dump_register_info(acb, dcb, srb); 2428 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2429 } 2430 /* clear_fifo(acb, "IO"); */ 2431 /* 2432 * load what physical address of Scatter/Gather list table 2433 * want to be transfer 2434 */ 2435 srb->state |= SRB_DATA_XFER; 2436 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2437 if (scsi_sg_count(srb->cmd)) { /* with S/G */ 2438 io_dir |= DMACMD_SG; 2439 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2440 srb->sg_bus_addr + 2441 sizeof(struct SGentry) * 2442 srb->sg_index); 2443 /* load how many bytes in the sg list table */ 2444 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2445 ((u32)(srb->sg_count - 2446 srb->sg_index) << 3)); 2447 } else { /* without S/G */ 2448 io_dir &= ~DMACMD_SG; 2449 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2450 srb->segment_x[0].address); 2451 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2452 srb->segment_x[0].length); 2453 } 2454 /* load total transfer length (24bits) max value 16Mbyte */ 2455 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2456 srb->total_xfer_length); 2457 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2458 if (io_dir & DMACMD_DIR) { /* read */ 2459 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2460 SCMD_DMA_IN); 2461 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2462 } else { 2463 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2464 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2465 SCMD_DMA_OUT); 2466 } 2467 2468 } 2469#if DC395x_LASTPIO 2470 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2471 /* 2472 * load what physical address of Scatter/Gather list table 2473 * want to be transfer 2474 */ 2475 srb->state |= SRB_DATA_XFER; 2476 /* load total transfer length (24bits) max value 16Mbyte */ 2477 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2478 srb->total_xfer_length); 2479 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2480 if (io_dir & DMACMD_DIR) { /* read */ 2481 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2482 SCMD_FIFO_IN); 2483 } else { /* write */ 2484 int ln = srb->total_xfer_length; 2485 size_t left_io = srb->total_xfer_length; 2486 2487 if (srb->dcb->sync_period & WIDE_SYNC) 2488 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2489 CFG2_WIDEFIFO); 2490 2491 while (left_io) { 2492 unsigned char *virt, *base = NULL; 2493 unsigned long flags = 0; 2494 size_t len = left_io; 2495 size_t offset = srb->request_length - left_io; 2496 2497 local_irq_save(flags); 2498 /* Again, max 4 bytes */ 2499 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2500 srb->sg_count, &offset, &len); 2501 virt = base + offset; 2502 2503 left_io -= len; 2504 2505 while (len--) { 2506 if (debug_enabled(DBG_PIO)) 2507 printk(" %02x", *virt); 2508 2509 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); 2510 2511 sg_subtract_one(srb); 2512 } 2513 2514 scsi_kunmap_atomic_sg(base); 2515 local_irq_restore(flags); 2516 } 2517 if (srb->dcb->sync_period & WIDE_SYNC) { 2518 if (ln % 2) { 2519 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2520 if (debug_enabled(DBG_PIO)) 2521 printk(" |00"); 2522 } 2523 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2524 } 2525 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2526 if (debug_enabled(DBG_PIO)) 2527 printk("\n"); 2528 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2529 SCMD_FIFO_OUT); 2530 } 2531 } 2532#endif /* DC395x_LASTPIO */ 2533 else { /* xfer pad */ 2534 u8 data = 0, data2 = 0; 2535 if (srb->sg_count) { 2536 srb->adapter_status = H_OVER_UNDER_RUN; 2537 srb->status |= OVER_RUN; 2538 } 2539 /* 2540 * KG: despite the fact that we are using 16 bits I/O ops 2541 * the SCSI FIFO is only 8 bits according to the docs 2542 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2543 */ 2544 if (dcb->sync_period & WIDE_SYNC) { 2545 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2546 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2547 CFG2_WIDEFIFO); 2548 if (io_dir & DMACMD_DIR) { 2549 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2550 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2551 } else { 2552 /* Danger, Robinson: If you find KGs 2553 * scattered over the wide disk, the driver 2554 * or chip is to blame :-( */ 2555 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2556 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2557 } 2558 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2559 } else { 2560 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2561 /* Danger, Robinson: If you find a collection of Ks on your disk 2562 * something broke :-( */ 2563 if (io_dir & DMACMD_DIR) 2564 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2565 else 2566 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2567 } 2568 srb->state |= SRB_XFERPAD; 2569 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2570 /* SCSI command */ 2571 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2572 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2573 } 2574} 2575 2576 2577static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2578 u16 *pscsi_status) 2579{ 2580 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", 2581 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2582 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2583 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2584 srb->state = SRB_COMPLETED; 2585 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2586 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2587 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2588} 2589 2590 2591static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2592 u16 *pscsi_status) 2593{ 2594 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", 2595 srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun); 2596 srb->state = SRB_STATUS; 2597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2598 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2599} 2600 2601 2602/* Check if the message is complete */ 2603static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2604{ 2605 if (*msgbuf == EXTENDED_MESSAGE) { 2606 if (len < 2) 2607 return 0; 2608 if (len < msgbuf[1] + 2) 2609 return 0; 2610 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2611 if (len < 2) 2612 return 0; 2613 return 1; 2614} 2615 2616/* reject_msg */ 2617static inline void msgin_reject(struct AdapterCtlBlk *acb, 2618 struct ScsiReqBlk *srb) 2619{ 2620 srb->msgout_buf[0] = MESSAGE_REJECT; 2621 srb->msg_count = 1; 2622 DC395x_ENABLE_MSGOUT; 2623 srb->state &= ~SRB_MSGIN; 2624 srb->state |= SRB_MSGOUT; 2625 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2626 srb->msgin_buf[0], 2627 srb->dcb->target_id, srb->dcb->target_lun); 2628} 2629 2630 2631static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2632 struct DeviceCtlBlk *dcb, u8 tag) 2633{ 2634 struct ScsiReqBlk *srb = NULL; 2635 struct ScsiReqBlk *i; 2636 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", 2637 srb->cmd->serial_number, tag, srb); 2638 2639 if (!(dcb->tag_mask & (1 << tag))) 2640 dprintkl(KERN_DEBUG, 2641 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2642 dcb->tag_mask, tag); 2643 2644 if (list_empty(&dcb->srb_going_list)) 2645 goto mingx0; 2646 list_for_each_entry(i, &dcb->srb_going_list, list) { 2647 if (i->tag_number == tag) { 2648 srb = i; 2649 break; 2650 } 2651 } 2652 if (!srb) 2653 goto mingx0; 2654 2655 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", 2656 srb->cmd->serial_number, srb->dcb->target_id, srb->dcb->target_lun); 2657 if (dcb->flag & ABORT_DEV_) { 2658 /*srb->state = SRB_ABORT_SENT; */ 2659 enable_msgout_abort(acb, srb); 2660 } 2661 2662 if (!(srb->state & SRB_DISCONNECT)) 2663 goto mingx0; 2664 2665 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2666 srb->state |= dcb->active_srb->state; 2667 srb->state |= SRB_DATA_XFER; 2668 dcb->active_srb = srb; 2669 /* How can we make the DORS happy? */ 2670 return srb; 2671 2672 mingx0: 2673 srb = acb->tmp_srb; 2674 srb->state = SRB_UNEXPECT_RESEL; 2675 dcb->active_srb = srb; 2676 srb->msgout_buf[0] = MSG_ABORT_TAG; 2677 srb->msg_count = 1; 2678 DC395x_ENABLE_MSGOUT; 2679 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2680 return srb; 2681} 2682 2683 2684static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2685 struct DeviceCtlBlk *dcb) 2686{ 2687 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2688 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2689 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2690 set_xfer_rate(acb, dcb); 2691} 2692 2693 2694/* set async transfer mode */ 2695static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2696{ 2697 struct DeviceCtlBlk *dcb = srb->dcb; 2698 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2699 dcb->target_id, dcb->target_lun); 2700 2701 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2702 dcb->sync_mode |= SYNC_NEGO_DONE; 2703 /*dcb->sync_period &= 0; */ 2704 dcb->sync_offset = 0; 2705 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2706 srb->state &= ~SRB_DO_SYNC_NEGO; 2707 reprogram_regs(acb, dcb); 2708 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2709 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2710 build_wdtr(acb, dcb, srb); 2711 DC395x_ENABLE_MSGOUT; 2712 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2713 } 2714} 2715 2716 2717/* set sync transfer mode */ 2718static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2719{ 2720 struct DeviceCtlBlk *dcb = srb->dcb; 2721 u8 bval; 2722 int fact; 2723 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2724 "(%02i.%01i MHz) Offset %i\n", 2725 dcb->target_id, srb->msgin_buf[3] << 2, 2726 (250 / srb->msgin_buf[3]), 2727 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2728 srb->msgin_buf[4]); 2729 2730 if (srb->msgin_buf[4] > 15) 2731 srb->msgin_buf[4] = 15; 2732 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2733 dcb->sync_offset = 0; 2734 else if (dcb->sync_offset == 0) 2735 dcb->sync_offset = srb->msgin_buf[4]; 2736 if (srb->msgin_buf[4] > dcb->sync_offset) 2737 srb->msgin_buf[4] = dcb->sync_offset; 2738 else 2739 dcb->sync_offset = srb->msgin_buf[4]; 2740 bval = 0; 2741 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2742 || dcb->min_nego_period > 2743 clock_period[bval])) 2744 bval++; 2745 if (srb->msgin_buf[3] < clock_period[bval]) 2746 dprintkl(KERN_INFO, 2747 "msgin_set_sync: Increase sync nego period to %ins\n", 2748 clock_period[bval] << 2); 2749 srb->msgin_buf[3] = clock_period[bval]; 2750 dcb->sync_period &= 0xf0; 2751 dcb->sync_period |= ALT_SYNC | bval; 2752 dcb->min_nego_period = srb->msgin_buf[3]; 2753 2754 if (dcb->sync_period & WIDE_SYNC) 2755 fact = 500; 2756 else 2757 fact = 250; 2758 2759 dprintkl(KERN_INFO, 2760 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2761 dcb->target_id, (fact == 500) ? "Wide16" : "", 2762 dcb->min_nego_period << 2, dcb->sync_offset, 2763 (fact / dcb->min_nego_period), 2764 ((fact % dcb->min_nego_period) * 10 + 2765 dcb->min_nego_period / 2) / dcb->min_nego_period); 2766 2767 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2768 /* Reply with corrected SDTR Message */ 2769 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2770 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2771 2772 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2773 srb->msg_count = 5; 2774 DC395x_ENABLE_MSGOUT; 2775 dcb->sync_mode |= SYNC_NEGO_DONE; 2776 } else { 2777 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2778 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2779 build_wdtr(acb, dcb, srb); 2780 DC395x_ENABLE_MSGOUT; 2781 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2782 } 2783 } 2784 srb->state &= ~SRB_DO_SYNC_NEGO; 2785 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2786 2787 reprogram_regs(acb, dcb); 2788} 2789 2790 2791static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2792 struct ScsiReqBlk *srb) 2793{ 2794 struct DeviceCtlBlk *dcb = srb->dcb; 2795 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2796 2797 dcb->sync_period &= ~WIDE_SYNC; 2798 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2799 dcb->sync_mode |= WIDE_NEGO_DONE; 2800 srb->state &= ~SRB_DO_WIDE_NEGO; 2801 reprogram_regs(acb, dcb); 2802 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2803 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2804 build_sdtr(acb, dcb, srb); 2805 DC395x_ENABLE_MSGOUT; 2806 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2807 } 2808} 2809 2810static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2811{ 2812 struct DeviceCtlBlk *dcb = srb->dcb; 2813 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2814 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2815 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2816 2817 if (srb->msgin_buf[3] > wide) 2818 srb->msgin_buf[3] = wide; 2819 /* Completed */ 2820 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2821 dprintkl(KERN_DEBUG, 2822 "msgin_set_wide: Wide nego initiated <%02i>\n", 2823 dcb->target_id); 2824 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2825 srb->msg_count = 4; 2826 srb->state |= SRB_DO_WIDE_NEGO; 2827 DC395x_ENABLE_MSGOUT; 2828 } 2829 2830 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2831 if (srb->msgin_buf[3] > 0) 2832 dcb->sync_period |= WIDE_SYNC; 2833 else 2834 dcb->sync_period &= ~WIDE_SYNC; 2835 srb->state &= ~SRB_DO_WIDE_NEGO; 2836 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2837 dprintkdbg(DBG_1, 2838 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2839 (8 << srb->msgin_buf[3]), dcb->target_id); 2840 reprogram_regs(acb, dcb); 2841 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2842 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2843 build_sdtr(acb, dcb, srb); 2844 DC395x_ENABLE_MSGOUT; 2845 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2846 } 2847} 2848 2849 2850/* 2851 * extended message codes: 2852 * 2853 * code description 2854 * 2855 * 02h Reserved 2856 * 00h MODIFY DATA POINTER 2857 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2858 * 03h WIDE DATA TRANSFER REQUEST 2859 * 04h - 7Fh Reserved 2860 * 80h - FFh Vendor specific 2861 */ 2862static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2863 u16 *pscsi_status) 2864{ 2865 struct DeviceCtlBlk *dcb = acb->active_dcb; 2866 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->serial_number); 2867 2868 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2869 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2870 /* Now eval the msg */ 2871 switch (srb->msgin_buf[0]) { 2872 case DISCONNECT: 2873 srb->state = SRB_DISCONNECT; 2874 break; 2875 2876 case SIMPLE_QUEUE_TAG: 2877 case HEAD_OF_QUEUE_TAG: 2878 case ORDERED_QUEUE_TAG: 2879 srb = 2880 msgin_qtag(acb, dcb, 2881 srb->msgin_buf[1]); 2882 break; 2883 2884 case MESSAGE_REJECT: 2885 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2886 DO_CLRATN | DO_DATALATCH); 2887 /* A sync nego message was rejected ! */ 2888 if (srb->state & SRB_DO_SYNC_NEGO) { 2889 msgin_set_async(acb, srb); 2890 break; 2891 } 2892 /* A wide nego message was rejected ! */ 2893 if (srb->state & SRB_DO_WIDE_NEGO) { 2894 msgin_set_nowide(acb, srb); 2895 break; 2896 } 2897 enable_msgout_abort(acb, srb); 2898 /*srb->state |= SRB_ABORT_SENT */ 2899 break; 2900 2901 case EXTENDED_MESSAGE: 2902 /* SDTR */ 2903 if (srb->msgin_buf[1] == 3 2904 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2905 msgin_set_sync(acb, srb); 2906 break; 2907 } 2908 /* WDTR */ 2909 if (srb->msgin_buf[1] == 2 2910 && srb->msgin_buf[2] == EXTENDED_WDTR 2911 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2912 msgin_set_wide(acb, srb); 2913 break; 2914 } 2915 msgin_reject(acb, srb); 2916 break; 2917 2918 case MSG_IGNOREWIDE: 2919 /* Discard wide residual */ 2920 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2921 break; 2922 2923 case COMMAND_COMPLETE: 2924 /* nothing has to be done */ 2925 break; 2926 2927 case SAVE_POINTERS: 2928 /* 2929 * SAVE POINTER may be ignored as we have the struct 2930 * ScsiReqBlk* associated with the scsi command. 2931 */ 2932 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2933 "SAVE POINTER rem=%i Ignore\n", 2934 srb->cmd->serial_number, srb->total_xfer_length); 2935 break; 2936 2937 case RESTORE_POINTERS: 2938 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2939 break; 2940 2941 case ABORT: 2942 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2943 "<%02i-%i> ABORT msg\n", 2944 srb->cmd->serial_number, dcb->target_id, 2945 dcb->target_lun); 2946 dcb->flag |= ABORT_DEV_; 2947 enable_msgout_abort(acb, srb); 2948 break; 2949 2950 default: 2951 /* reject unknown messages */ 2952 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2953 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2954 srb->msg_count = 1; 2955 srb->msgout_buf[0] = dcb->identify_msg; 2956 DC395x_ENABLE_MSGOUT; 2957 srb->state |= SRB_MSGOUT; 2958 /*break; */ 2959 } 2960 msgin_reject(acb, srb); 2961 } 2962 2963 /* Clear counter and MsgIn state */ 2964 srb->state &= ~SRB_MSGIN; 2965 acb->msg_len = 0; 2966 } 2967 *pscsi_status = PH_BUS_FREE; 2968 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2969 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2970} 2971 2972 2973static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2974 u16 *pscsi_status) 2975{ 2976 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->serial_number); 2977 clear_fifo(acb, "msgin_phase1"); 2978 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2979 if (!(srb->state & SRB_MSGIN)) { 2980 srb->state &= ~SRB_DISCONNECT; 2981 srb->state |= SRB_MSGIN; 2982 } 2983 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2984 /* SCSI command */ 2985 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2986} 2987 2988 2989static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2990 u16 *pscsi_status) 2991{ 2992} 2993 2994 2995static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2996 u16 *pscsi_status) 2997{ 2998} 2999 3000 3001static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3002{ 3003 struct DeviceCtlBlk *i; 3004 3005 /* set all lun device's period, offset */ 3006 if (dcb->identify_msg & 0x07) 3007 return; 3008 3009 if (acb->scan_devices) { 3010 current_sync_offset = dcb->sync_offset; 3011 return; 3012 } 3013 3014 list_for_each_entry(i, &acb->dcb_list, list) 3015 if (i->target_id == dcb->target_id) { 3016 i->sync_period = dcb->sync_period; 3017 i->sync_offset = dcb->sync_offset; 3018 i->sync_mode = dcb->sync_mode; 3019 i->min_nego_period = dcb->min_nego_period; 3020 } 3021} 3022 3023 3024static void disconnect(struct AdapterCtlBlk *acb) 3025{ 3026 struct DeviceCtlBlk *dcb = acb->active_dcb; 3027 struct ScsiReqBlk *srb; 3028 3029 if (!dcb) { 3030 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3031 udelay(500); 3032 /* Suspend queue for a while */ 3033 acb->scsi_host->last_reset = 3034 jiffies + HZ / 2 + 3035 HZ * acb->eeprom.delay_time; 3036 clear_fifo(acb, "disconnectEx"); 3037 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3038 return; 3039 } 3040 srb = dcb->active_srb; 3041 acb->active_dcb = NULL; 3042 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->serial_number); 3043 3044 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3045 clear_fifo(acb, "disconnect"); 3046 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3047 if (srb->state & SRB_UNEXPECT_RESEL) { 3048 dprintkl(KERN_ERR, 3049 "disconnect: Unexpected reselection <%02i-%i>\n", 3050 dcb->target_id, dcb->target_lun); 3051 srb->state = 0; 3052 waiting_process_next(acb); 3053 } else if (srb->state & SRB_ABORT_SENT) { 3054 dcb->flag &= ~ABORT_DEV_; 3055 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; 3056 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3057 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3058 waiting_process_next(acb); 3059 } else { 3060 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3061 || !(srb-> 3062 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3063 /* 3064 * Selection time out 3065 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3066 */ 3067 /* Unexp. Disc / Sel Timeout */ 3068 if (srb->state != SRB_START_ 3069 && srb->state != SRB_MSGOUT) { 3070 srb->state = SRB_READY; 3071 dprintkl(KERN_DEBUG, 3072 "disconnect: (pid#%li) Unexpected\n", 3073 srb->cmd->serial_number); 3074 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3075 goto disc1; 3076 } else { 3077 /* Normal selection timeout */ 3078 dprintkdbg(DBG_KG, "disconnect: (pid#%li) " 3079 "<%02i-%i> SelTO\n", srb->cmd->serial_number, 3080 dcb->target_id, dcb->target_lun); 3081 if (srb->retry_count++ > DC395x_MAX_RETRIES 3082 || acb->scan_devices) { 3083 srb->target_status = 3084 SCSI_STAT_SEL_TIMEOUT; 3085 goto disc1; 3086 } 3087 free_tag(dcb, srb); 3088 srb_going_to_waiting_move(dcb, srb); 3089 dprintkdbg(DBG_KG, 3090 "disconnect: (pid#%li) Retry\n", 3091 srb->cmd->serial_number); 3092 waiting_set_timer(acb, HZ / 20); 3093 } 3094 } else if (srb->state & SRB_DISCONNECT) { 3095 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3096 /* 3097 * SRB_DISCONNECT (This is what we expect!) 3098 */ 3099 if (bval & 0x40) { 3100 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3101 " 0x%02x: ACK set! Other controllers?\n", 3102 bval); 3103 /* It could come from another initiator, therefore don't do much ! */ 3104 } else 3105 waiting_process_next(acb); 3106 } else if (srb->state & SRB_COMPLETED) { 3107 disc1: 3108 /* 3109 ** SRB_COMPLETED 3110 */ 3111 free_tag(dcb, srb); 3112 dcb->active_srb = NULL; 3113 srb->state = SRB_FREE; 3114 srb_done(acb, dcb, srb); 3115 } 3116 } 3117} 3118 3119 3120static void reselect(struct AdapterCtlBlk *acb) 3121{ 3122 struct DeviceCtlBlk *dcb = acb->active_dcb; 3123 struct ScsiReqBlk *srb = NULL; 3124 u16 rsel_tar_lun_id; 3125 u8 id, lun; 3126 u8 arblostflag = 0; 3127 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3128 3129 clear_fifo(acb, "reselect"); 3130 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3131 /* Read Reselected Target ID and LUN */ 3132 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3133 if (dcb) { /* Arbitration lost but Reselection win */ 3134 srb = dcb->active_srb; 3135 if (!srb) { 3136 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3137 "but active_srb == NULL\n"); 3138 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3139 return; 3140 } 3141 /* Why the if ? */ 3142 if (!acb->scan_devices) { 3143 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " 3144 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3145 srb->cmd->serial_number, dcb->target_id, 3146 dcb->target_lun, rsel_tar_lun_id, 3147 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3148 arblostflag = 1; 3149 /*srb->state |= SRB_DISCONNECT; */ 3150 3151 srb->state = SRB_READY; 3152 free_tag(dcb, srb); 3153 srb_going_to_waiting_move(dcb, srb); 3154 waiting_set_timer(acb, HZ / 20); 3155 3156 /* return; */ 3157 } 3158 } 3159 /* Read Reselected Target Id and LUN */ 3160 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3161 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3162 "Got %i!\n", rsel_tar_lun_id); 3163 id = rsel_tar_lun_id & 0xff; 3164 lun = (rsel_tar_lun_id >> 8) & 7; 3165 dcb = find_dcb(acb, id, lun); 3166 if (!dcb) { 3167 dprintkl(KERN_ERR, "reselect: From non existent device " 3168 "<%02i-%i>\n", id, lun); 3169 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3170 return; 3171 } 3172 acb->active_dcb = dcb; 3173 3174 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3175 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3176 "disconnection? <%02i-%i>\n", 3177 dcb->target_id, dcb->target_lun); 3178 3179 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3180 srb = acb->tmp_srb; 3181 dcb->active_srb = srb; 3182 } else { 3183 /* There can be only one! */ 3184 srb = dcb->active_srb; 3185 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3186 /* 3187 * abort command 3188 */ 3189 dprintkl(KERN_DEBUG, 3190 "reselect: w/o disconnected cmds <%02i-%i>\n", 3191 dcb->target_id, dcb->target_lun); 3192 srb = acb->tmp_srb; 3193 srb->state = SRB_UNEXPECT_RESEL; 3194 dcb->active_srb = srb; 3195 enable_msgout_abort(acb, srb); 3196 } else { 3197 if (dcb->flag & ABORT_DEV_) { 3198 /*srb->state = SRB_ABORT_SENT; */ 3199 enable_msgout_abort(acb, srb); 3200 } else 3201 srb->state = SRB_DATA_XFER; 3202 3203 } 3204 } 3205 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3206 3207 /* Program HA ID, target ID, period and offset */ 3208 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3209 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3210 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3211 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3212 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3213 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3214 /* SCSI command */ 3215 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3216} 3217 3218 3219static inline u8 tagq_blacklist(char *name) 3220{ 3221#ifndef DC395x_NO_TAGQ 3222#if 0 3223 u8 i; 3224 for (i = 0; i < BADDEVCNT; i++) 3225 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3226 return 1; 3227#endif 3228 return 0; 3229#else 3230 return 1; 3231#endif 3232} 3233 3234 3235static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3236{ 3237 /* Check for SCSI format (ANSI and Response data format) */ 3238 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3239 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3240 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3241 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3242 /* ((dcb->dev_type == TYPE_DISK) 3243 || (dcb->dev_type == TYPE_MOD)) && */ 3244 !tagq_blacklist(((char *)ptr) + 8)) { 3245 if (dcb->max_command == 1) 3246 dcb->max_command = 3247 dcb->acb->tag_max_num; 3248 dcb->sync_mode |= EN_TAG_QUEUEING; 3249 /*dcb->tag_mask = 0; */ 3250 } else 3251 dcb->max_command = 1; 3252 } 3253} 3254 3255 3256static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3257 struct ScsiInqData *ptr) 3258{ 3259 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3260 dcb->dev_type = bval1; 3261 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3262 disc_tagq_set(dcb, ptr); 3263} 3264 3265 3266/* unmap mapped pci regions from SRB */ 3267static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3268{ 3269 struct scsi_cmnd *cmd = srb->cmd; 3270 enum dma_data_direction dir = cmd->sc_data_direction; 3271 3272 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) { 3273 /* unmap DC395x SG list */ 3274 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3275 srb->sg_bus_addr, SEGMENTX_LEN); 3276 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3277 SEGMENTX_LEN, 3278 PCI_DMA_TODEVICE); 3279 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3280 scsi_sg_count(cmd), scsi_bufflen(cmd)); 3281 /* unmap the sg segments */ 3282 scsi_dma_unmap(cmd); 3283 } 3284} 3285 3286 3287/* unmap mapped pci sense buffer from SRB */ 3288static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3289 struct ScsiReqBlk *srb) 3290{ 3291 if (!(srb->flag & AUTO_REQSENSE)) 3292 return; 3293 /* Unmap sense buffer */ 3294 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3295 srb->segment_x[0].address); 3296 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3297 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3298 /* Restore SG stuff */ 3299 srb->total_xfer_length = srb->xferred; 3300 srb->segment_x[0].address = 3301 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3302 srb->segment_x[0].length = 3303 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3304} 3305 3306 3307/* 3308 * Complete execution of a SCSI command 3309 * Signal completion to the generic SCSI driver 3310 */ 3311static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3312 struct ScsiReqBlk *srb) 3313{ 3314 u8 tempcnt, status; 3315 struct scsi_cmnd *cmd = srb->cmd; 3316 enum dma_data_direction dir = cmd->sc_data_direction; 3317 int ckc_only = 1; 3318 3319 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->serial_number, 3320 srb->cmd->device->id, srb->cmd->device->lun); 3321 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", 3322 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, 3323 scsi_sgtalbe(cmd)); 3324 status = srb->target_status; 3325 if (srb->flag & AUTO_REQSENSE) { 3326 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3327 pci_unmap_srb_sense(acb, srb); 3328 /* 3329 ** target status.......................... 3330 */ 3331 srb->flag &= ~AUTO_REQSENSE; 3332 srb->adapter_status = 0; 3333 srb->target_status = CHECK_CONDITION << 1; 3334 if (debug_enabled(DBG_1)) { 3335 switch (cmd->sense_buffer[2] & 0x0f) { 3336 case NOT_READY: 3337 dprintkl(KERN_DEBUG, 3338 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3339 cmd->cmnd[0], dcb->target_id, 3340 dcb->target_lun, status, acb->scan_devices); 3341 break; 3342 case UNIT_ATTENTION: 3343 dprintkl(KERN_DEBUG, 3344 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3345 cmd->cmnd[0], dcb->target_id, 3346 dcb->target_lun, status, acb->scan_devices); 3347 break; 3348 case ILLEGAL_REQUEST: 3349 dprintkl(KERN_DEBUG, 3350 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3351 cmd->cmnd[0], dcb->target_id, 3352 dcb->target_lun, status, acb->scan_devices); 3353 break; 3354 case MEDIUM_ERROR: 3355 dprintkl(KERN_DEBUG, 3356 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3357 cmd->cmnd[0], dcb->target_id, 3358 dcb->target_lun, status, acb->scan_devices); 3359 break; 3360 case HARDWARE_ERROR: 3361 dprintkl(KERN_DEBUG, 3362 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3363 cmd->cmnd[0], dcb->target_id, 3364 dcb->target_lun, status, acb->scan_devices); 3365 break; 3366 } 3367 if (cmd->sense_buffer[7] >= 6) 3368 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3369 "(0x%08x 0x%08x)\n", 3370 cmd->sense_buffer[2], cmd->sense_buffer[12], 3371 cmd->sense_buffer[13], 3372 *((unsigned int *)(cmd->sense_buffer + 3)), 3373 *((unsigned int *)(cmd->sense_buffer + 8))); 3374 else 3375 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3376 cmd->sense_buffer[2], 3377 *((unsigned int *)(cmd->sense_buffer + 3))); 3378 } 3379 3380 if (status == (CHECK_CONDITION << 1)) { 3381 cmd->result = DID_BAD_TARGET << 16; 3382 goto ckc_e; 3383 } 3384 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3385 3386 if (srb->total_xfer_length 3387 && srb->total_xfer_length >= cmd->underflow) 3388 cmd->result = 3389 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3390 srb->end_message, CHECK_CONDITION); 3391 /*SET_RES_DID(cmd->result,DID_OK) */ 3392 else 3393 cmd->result = 3394 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3395 srb->end_message, CHECK_CONDITION); 3396 3397 goto ckc_e; 3398 } 3399 3400/*************************************************************/ 3401 if (status) { 3402 /* 3403 * target status.......................... 3404 */ 3405 if (status_byte(status) == CHECK_CONDITION) { 3406 request_sense(acb, dcb, srb); 3407 return; 3408 } else if (status_byte(status) == QUEUE_FULL) { 3409 tempcnt = (u8)list_size(&dcb->srb_going_list); 3410 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3411 dcb->target_id, dcb->target_lun, tempcnt); 3412 if (tempcnt > 1) 3413 tempcnt--; 3414 dcb->max_command = tempcnt; 3415 free_tag(dcb, srb); 3416 srb_going_to_waiting_move(dcb, srb); 3417 waiting_set_timer(acb, HZ / 20); 3418 srb->adapter_status = 0; 3419 srb->target_status = 0; 3420 return; 3421 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3422 srb->adapter_status = H_SEL_TIMEOUT; 3423 srb->target_status = 0; 3424 cmd->result = DID_NO_CONNECT << 16; 3425 } else { 3426 srb->adapter_status = 0; 3427 SET_RES_DID(cmd->result, DID_ERROR); 3428 SET_RES_MSG(cmd->result, srb->end_message); 3429 SET_RES_TARGET(cmd->result, status); 3430 3431 } 3432 } else { 3433 /* 3434 ** process initiator status.......................... 3435 */ 3436 status = srb->adapter_status; 3437 if (status & H_OVER_UNDER_RUN) { 3438 srb->target_status = 0; 3439 SET_RES_DID(cmd->result, DID_OK); 3440 SET_RES_MSG(cmd->result, srb->end_message); 3441 } else if (srb->status & PARITY_ERROR) { 3442 SET_RES_DID(cmd->result, DID_PARITY); 3443 SET_RES_MSG(cmd->result, srb->end_message); 3444 } else { /* No error */ 3445 3446 srb->adapter_status = 0; 3447 srb->target_status = 0; 3448 SET_RES_DID(cmd->result, DID_OK); 3449 } 3450 } 3451 3452 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd)) 3453 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd), 3454 scsi_sg_count(cmd), dir); 3455 3456 ckc_only = 0; 3457/* Check Error Conditions */ 3458 ckc_e: 3459 3460 if (cmd->cmnd[0] == INQUIRY) { 3461 unsigned char *base = NULL; 3462 struct ScsiInqData *ptr; 3463 unsigned long flags = 0; 3464 struct scatterlist* sg = scsi_sglist(cmd); 3465 size_t offset = 0, len = sizeof(struct ScsiInqData); 3466 3467 local_irq_save(flags); 3468 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); 3469 ptr = (struct ScsiInqData *)(base + offset); 3470 3471 if (!ckc_only && (cmd->result & RES_DID) == 0 3472 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 3473 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3474 dcb->inquiry7 = ptr->Flags; 3475 3476 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3477 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3478 if ((cmd->result == (DID_OK << 16) 3479 || status_byte(cmd->result) & 3480 CHECK_CONDITION)) { 3481 if (!dcb->init_tcq_flag) { 3482 add_dev(acb, dcb, ptr); 3483 dcb->init_tcq_flag = 1; 3484 } 3485 } 3486 3487 scsi_kunmap_atomic_sg(base); 3488 local_irq_restore(flags); 3489 } 3490 3491 /* Here is the info for Doug Gilbert's sg3 ... */ 3492 scsi_set_resid(cmd, srb->total_xfer_length); 3493 /* This may be interpreted by sb. or not ... */ 3494 cmd->SCp.this_residual = srb->total_xfer_length; 3495 cmd->SCp.buffers_residual = 0; 3496 if (debug_enabled(DBG_KG)) { 3497 if (srb->total_xfer_length) 3498 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " 3499 "cmnd=0x%02x Missed %i bytes\n", 3500 cmd->serial_number, cmd->device->id, cmd->device->lun, 3501 cmd->cmnd[0], srb->total_xfer_length); 3502 } 3503 3504 srb_going_remove(dcb, srb); 3505 /* Add to free list */ 3506 if (srb == acb->tmp_srb) 3507 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3508 else { 3509 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", 3510 cmd->serial_number, cmd->result); 3511 srb_free_insert(acb, srb); 3512 } 3513 pci_unmap_srb(acb, srb); 3514 3515 cmd->scsi_done(cmd); 3516 waiting_process_next(acb); 3517} 3518 3519 3520/* abort all cmds in our queues */ 3521static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3522 struct scsi_cmnd *cmd, u8 force) 3523{ 3524 struct DeviceCtlBlk *dcb; 3525 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3526 3527 list_for_each_entry(dcb, &acb->dcb_list, list) { 3528 struct ScsiReqBlk *srb; 3529 struct ScsiReqBlk *tmp; 3530 struct scsi_cmnd *p; 3531 3532 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3533 enum dma_data_direction dir; 3534 int result; 3535 3536 p = srb->cmd; 3537 dir = p->sc_data_direction; 3538 result = MK_RES(0, did_flag, 0, 0); 3539 printk("G:%li(%02i-%i) ", p->serial_number, 3540 p->device->id, p->device->lun); 3541 srb_going_remove(dcb, srb); 3542 free_tag(dcb, srb); 3543 srb_free_insert(acb, srb); 3544 p->result = result; 3545 pci_unmap_srb_sense(acb, srb); 3546 pci_unmap_srb(acb, srb); 3547 if (force) { 3548 /* For new EH, we normally don't need to give commands back, 3549 * as they all complete or all time out */ 3550 p->scsi_done(p); 3551 } 3552 } 3553 if (!list_empty(&dcb->srb_going_list)) 3554 dprintkl(KERN_DEBUG, 3555 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3556 dcb->target_id, dcb->target_lun); 3557 if (dcb->tag_mask) 3558 dprintkl(KERN_DEBUG, 3559 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3560 dcb->target_id, dcb->target_lun, 3561 dcb->tag_mask); 3562 3563 /* Waiting queue */ 3564 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3565 int result; 3566 p = srb->cmd; 3567 3568 result = MK_RES(0, did_flag, 0, 0); 3569 printk("W:%li<%02i-%i>", p->serial_number, p->device->id, 3570 p->device->lun); 3571 srb_waiting_remove(dcb, srb); 3572 srb_free_insert(acb, srb); 3573 p->result = result; 3574 pci_unmap_srb_sense(acb, srb); 3575 pci_unmap_srb(acb, srb); 3576 if (force) { 3577 /* For new EH, we normally don't need to give commands back, 3578 * as they all complete or all time out */ 3579 cmd->scsi_done(cmd); 3580 } 3581 } 3582 if (!list_empty(&dcb->srb_waiting_list)) 3583 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3584 list_size(&dcb->srb_waiting_list), dcb->target_id, 3585 dcb->target_lun); 3586 dcb->flag &= ~ABORT_DEV_; 3587 } 3588 printk("\n"); 3589} 3590 3591 3592static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3593{ 3594 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3595 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3596 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3597 3598 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3599 /* nothing */; 3600} 3601 3602 3603static void set_basic_config(struct AdapterCtlBlk *acb) 3604{ 3605 u8 bval; 3606 u16 wval; 3607 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3608 if (acb->config & HCC_PARITY) 3609 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3610 else 3611 bval = PHASELATCH | INITIATOR | BLOCKRST; 3612 3613 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3614 3615 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3616 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3617 /* program Host ID */ 3618 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3619 /* set ansynchronous transfer */ 3620 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3621 /* Turn LED control off */ 3622 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3623 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3624 /* DMA config */ 3625 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3626 wval |= 3627 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3628 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3629 /* Clear pending interrupt status */ 3630 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3631 /* Enable SCSI interrupt */ 3632 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3633 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3634 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3635 ); 3636} 3637 3638 3639static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3640{ 3641 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3642 /* delay half a second */ 3643 if (timer_pending(&acb->waiting_timer)) 3644 del_timer(&acb->waiting_timer); 3645 3646 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3647 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3648 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3649 udelay(500); 3650 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3651 acb->scsi_host->last_reset = 3652 jiffies + 5 * HZ / 2 + 3653 HZ * acb->eeprom.delay_time; 3654 3655 clear_fifo(acb, "scsi_reset_detect"); 3656 set_basic_config(acb); 3657 /*1.25 */ 3658 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3659 3660 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3661 acb->acb_flag |= RESET_DONE; 3662 } else { 3663 acb->acb_flag |= RESET_DETECT; 3664 reset_dev_param(acb); 3665 doing_srb_done(acb, DID_RESET, NULL, 1); 3666 /*DC395x_RecoverSRB( acb ); */ 3667 acb->active_dcb = NULL; 3668 acb->acb_flag = 0; 3669 waiting_process_next(acb); 3670 } 3671} 3672 3673 3674static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3675 struct ScsiReqBlk *srb) 3676{ 3677 struct scsi_cmnd *cmd = srb->cmd; 3678 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", 3679 cmd->serial_number, cmd->device->id, cmd->device->lun); 3680 3681 srb->flag |= AUTO_REQSENSE; 3682 srb->adapter_status = 0; 3683 srb->target_status = 0; 3684 3685 /* KG: Can this prevent crap sense data ? */ 3686 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 3687 3688 /* Save some data */ 3689 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3690 srb->segment_x[0].address; 3691 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3692 srb->segment_x[0].length; 3693 srb->xferred = srb->total_xfer_length; 3694 /* srb->segment_x : a one entry of S/G list table */ 3695 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE; 3696 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; 3697 /* Map sense buffer */ 3698 srb->segment_x[0].address = 3699 pci_map_single(acb->dev, cmd->sense_buffer, 3700 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); 3701 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3702 cmd->sense_buffer, srb->segment_x[0].address, 3703 SCSI_SENSE_BUFFERSIZE); 3704 srb->sg_count = 1; 3705 srb->sg_index = 0; 3706 3707 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3708 dprintkl(KERN_DEBUG, 3709 "request_sense: (pid#%li) failed <%02i-%i>\n", 3710 srb->cmd->serial_number, dcb->target_id, dcb->target_lun); 3711 srb_going_to_waiting_move(dcb, srb); 3712 waiting_set_timer(acb, HZ / 100); 3713 } 3714} 3715 3716 3717/** 3718 * device_alloc - Allocate a new device instance. This create the 3719 * devices instance and sets up all the data items. The adapter 3720 * instance is required to obtain confiuration information for this 3721 * device. This does *not* add this device to the adapters device 3722 * list. 3723 * 3724 * @acb: The adapter to obtain configuration information from. 3725 * @target: The target for the new device. 3726 * @lun: The lun for the new device. 3727 * 3728 * Return the new device if successful or NULL on failure. 3729 **/ 3730static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3731 u8 target, u8 lun) 3732{ 3733 struct NvRamType *eeprom = &acb->eeprom; 3734 u8 period_index = eeprom->target[target].period & 0x07; 3735 struct DeviceCtlBlk *dcb; 3736 3737 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3738 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3739 if (!dcb) 3740 return NULL; 3741 dcb->acb = NULL; 3742 INIT_LIST_HEAD(&dcb->srb_going_list); 3743 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3744 dcb->active_srb = NULL; 3745 dcb->tag_mask = 0; 3746 dcb->max_command = 1; 3747 dcb->target_id = target; 3748 dcb->target_lun = lun; 3749#ifndef DC395x_NO_DISCONNECT 3750 dcb->identify_msg = 3751 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3752#else 3753 dcb->identify_msg = IDENTIFY(0, lun); 3754#endif 3755 dcb->dev_mode = eeprom->target[target].cfg0; 3756 dcb->inquiry7 = 0; 3757 dcb->sync_mode = 0; 3758 dcb->min_nego_period = clock_period[period_index]; 3759 dcb->sync_period = 0; 3760 dcb->sync_offset = 0; 3761 dcb->flag = 0; 3762 3763#ifndef DC395x_NO_WIDE 3764 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3765 && (acb->config & HCC_WIDE_CARD)) 3766 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3767#endif 3768#ifndef DC395x_NO_SYNC 3769 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3770 if (!(lun) || current_sync_offset) 3771 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3772#endif 3773 if (dcb->target_lun != 0) { 3774 /* Copy settings */ 3775 struct DeviceCtlBlk *p; 3776 list_for_each_entry(p, &acb->dcb_list, list) 3777 if (p->target_id == dcb->target_id) 3778 break; 3779 dprintkdbg(DBG_1, 3780 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3781 dcb->target_id, dcb->target_lun, 3782 p->target_id, p->target_lun); 3783 dcb->sync_mode = p->sync_mode; 3784 dcb->sync_period = p->sync_period; 3785 dcb->min_nego_period = p->min_nego_period; 3786 dcb->sync_offset = p->sync_offset; 3787 dcb->inquiry7 = p->inquiry7; 3788 } 3789 return dcb; 3790} 3791 3792 3793/** 3794 * adapter_add_device - Adds the device instance to the adaptor instance. 3795 * 3796 * @acb: The adapter device to be updated 3797 * @dcb: A newly created and intialised device instance to add. 3798 **/ 3799static void adapter_add_device(struct AdapterCtlBlk *acb, 3800 struct DeviceCtlBlk *dcb) 3801{ 3802 /* backpointer to adapter */ 3803 dcb->acb = acb; 3804 3805 /* set run_robin to this device if it is currently empty */ 3806 if (list_empty(&acb->dcb_list)) 3807 acb->dcb_run_robin = dcb; 3808 3809 /* add device to list */ 3810 list_add_tail(&dcb->list, &acb->dcb_list); 3811 3812 /* update device maps */ 3813 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3814 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3815} 3816 3817 3818/** 3819 * adapter_remove_device - Removes the device instance from the adaptor 3820 * instance. The device instance is not check in any way or freed by this. 3821 * The caller is expected to take care of that. This will simply remove the 3822 * device from the adapters data strcutures. 3823 * 3824 * @acb: The adapter device to be updated 3825 * @dcb: A device that has previously been added to the adapter. 3826 **/ 3827static void adapter_remove_device(struct AdapterCtlBlk *acb, 3828 struct DeviceCtlBlk *dcb) 3829{ 3830 struct DeviceCtlBlk *i; 3831 struct DeviceCtlBlk *tmp; 3832 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3833 dcb->target_id, dcb->target_lun); 3834 3835 /* fix up any pointers to this device that we have in the adapter */ 3836 if (acb->active_dcb == dcb) 3837 acb->active_dcb = NULL; 3838 if (acb->dcb_run_robin == dcb) 3839 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3840 3841 /* unlink from list */ 3842 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3843 if (dcb == i) { 3844 list_del(&i->list); 3845 break; 3846 } 3847 3848 /* clear map and children */ 3849 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3850 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3851 dcb->acb = NULL; 3852} 3853 3854 3855/** 3856 * adapter_remove_and_free_device - Removes a single device from the adapter 3857 * and then frees the device information. 3858 * 3859 * @acb: The adapter device to be updated 3860 * @dcb: A device that has previously been added to the adapter. 3861 */ 3862static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3863 struct DeviceCtlBlk *dcb) 3864{ 3865 if (list_size(&dcb->srb_going_list) > 1) { 3866 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3867 "Won't remove because of %i active requests.\n", 3868 dcb->target_id, dcb->target_lun, 3869 list_size(&dcb->srb_going_list)); 3870 return; 3871 } 3872 adapter_remove_device(acb, dcb); 3873 kfree(dcb); 3874} 3875 3876 3877/** 3878 * adapter_remove_and_free_all_devices - Removes and frees all of the 3879 * devices associated with the specified adapter. 3880 * 3881 * @acb: The adapter from which all devices should be removed. 3882 **/ 3883static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3884{ 3885 struct DeviceCtlBlk *dcb; 3886 struct DeviceCtlBlk *tmp; 3887 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3888 list_size(&acb->dcb_list)); 3889 3890 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3891 adapter_remove_and_free_device(acb, dcb); 3892} 3893 3894 3895/** 3896 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3897 * scsi device that we need to deal with. We allocate a new device and then 3898 * insert that device into the adapters device list. 3899 * 3900 * @scsi_device: The new scsi device that we need to handle. 3901 **/ 3902static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3903{ 3904 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3905 struct DeviceCtlBlk *dcb; 3906 3907 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3908 if (!dcb) 3909 return -ENOMEM; 3910 adapter_add_device(acb, dcb); 3911 3912 return 0; 3913} 3914 3915 3916/** 3917 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3918 * device that is going away. 3919 * 3920 * @scsi_device: The new scsi device that we need to handle. 3921 **/ 3922static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3923{ 3924 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3925 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3926 if (dcb) 3927 adapter_remove_and_free_device(acb, dcb); 3928} 3929 3930 3931 3932 3933/** 3934 * trms1040_wait_30us: wait for 30 us 3935 * 3936 * Waits for 30us (using the chip by the looks of it..) 3937 * 3938 * @io_port: base I/O address 3939 **/ 3940static void __devinit trms1040_wait_30us(unsigned long io_port) 3941{ 3942 /* ScsiPortStallExecution(30); wait 30 us */ 3943 outb(5, io_port + TRM_S1040_GEN_TIMER); 3944 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3945 /* nothing */ ; 3946} 3947 3948 3949/** 3950 * trms1040_write_cmd - write the secified command and address to 3951 * chip 3952 * 3953 * @io_port: base I/O address 3954 * @cmd: SB + op code (command) to send 3955 * @addr: address to send 3956 **/ 3957static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3958{ 3959 int i; 3960 u8 send_data; 3961 3962 /* program SB + OP code */ 3963 for (i = 0; i < 3; i++, cmd <<= 1) { 3964 send_data = NVR_SELECT; 3965 if (cmd & 0x04) /* Start from bit 2 */ 3966 send_data |= NVR_BITOUT; 3967 3968 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3969 trms1040_wait_30us(io_port); 3970 outb((send_data | NVR_CLOCK), 3971 io_port + TRM_S1040_GEN_NVRAM); 3972 trms1040_wait_30us(io_port); 3973 } 3974 3975 /* send address */ 3976 for (i = 0; i < 7; i++, addr <<= 1) { 3977 send_data = NVR_SELECT; 3978 if (addr & 0x40) /* Start from bit 6 */ 3979 send_data |= NVR_BITOUT; 3980 3981 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3982 trms1040_wait_30us(io_port); 3983 outb((send_data | NVR_CLOCK), 3984 io_port + TRM_S1040_GEN_NVRAM); 3985 trms1040_wait_30us(io_port); 3986 } 3987 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3988 trms1040_wait_30us(io_port); 3989} 3990 3991 3992/** 3993 * trms1040_set_data - store a single byte in the eeprom 3994 * 3995 * Called from write all to write a single byte into the SSEEPROM 3996 * Which is done one bit at a time. 3997 * 3998 * @io_port: base I/O address 3999 * @addr: offset into EEPROM 4000 * @byte: bytes to write 4001 **/ 4002static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4003{ 4004 int i; 4005 u8 send_data; 4006 4007 /* Send write command & address */ 4008 trms1040_write_cmd(io_port, 0x05, addr); 4009 4010 /* Write data */ 4011 for (i = 0; i < 8; i++, byte <<= 1) { 4012 send_data = NVR_SELECT; 4013 if (byte & 0x80) /* Start from bit 7 */ 4014 send_data |= NVR_BITOUT; 4015 4016 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4017 trms1040_wait_30us(io_port); 4018 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4019 trms1040_wait_30us(io_port); 4020 } 4021 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4022 trms1040_wait_30us(io_port); 4023 4024 /* Disable chip select */ 4025 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4026 trms1040_wait_30us(io_port); 4027 4028 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4029 trms1040_wait_30us(io_port); 4030 4031 /* Wait for write ready */ 4032 while (1) { 4033 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4034 trms1040_wait_30us(io_port); 4035 4036 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4037 trms1040_wait_30us(io_port); 4038 4039 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4040 break; 4041 } 4042 4043 /* Disable chip select */ 4044 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4045} 4046 4047 4048/** 4049 * trms1040_write_all - write 128 bytes to the eeprom 4050 * 4051 * Write the supplied 128 bytes to the chips SEEPROM 4052 * 4053 * @eeprom: the data to write 4054 * @io_port: the base io port 4055 **/ 4056static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4057{ 4058 u8 *b_eeprom = (u8 *)eeprom; 4059 u8 addr; 4060 4061 /* Enable SEEPROM */ 4062 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4063 io_port + TRM_S1040_GEN_CONTROL); 4064 4065 /* write enable */ 4066 trms1040_write_cmd(io_port, 0x04, 0xFF); 4067 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4068 trms1040_wait_30us(io_port); 4069 4070 /* write */ 4071 for (addr = 0; addr < 128; addr++, b_eeprom++) 4072 trms1040_set_data(io_port, addr, *b_eeprom); 4073 4074 /* write disable */ 4075 trms1040_write_cmd(io_port, 0x04, 0x00); 4076 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4077 trms1040_wait_30us(io_port); 4078 4079 /* Disable SEEPROM */ 4080 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4081 io_port + TRM_S1040_GEN_CONTROL); 4082} 4083 4084 4085/** 4086 * trms1040_get_data - get a single byte from the eeprom 4087 * 4088 * Called from read all to read a single byte into the SSEEPROM 4089 * Which is done one bit at a time. 4090 * 4091 * @io_port: base I/O address 4092 * @addr: offset into SEEPROM 4093 * 4094 * Returns the byte read. 4095 **/ 4096static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) 4097{ 4098 int i; 4099 u8 read_byte; 4100 u8 result = 0; 4101 4102 /* Send read command & address */ 4103 trms1040_write_cmd(io_port, 0x06, addr); 4104 4105 /* read data */ 4106 for (i = 0; i < 8; i++) { 4107 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4108 trms1040_wait_30us(io_port); 4109 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4110 4111 /* Get data bit while falling edge */ 4112 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4113 result <<= 1; 4114 if (read_byte & NVR_BITIN) 4115 result |= 1; 4116 4117 trms1040_wait_30us(io_port); 4118 } 4119 4120 /* Disable chip select */ 4121 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4122 return result; 4123} 4124 4125 4126/** 4127 * trms1040_read_all - read all bytes from the eeprom 4128 * 4129 * Read the 128 bytes from the SEEPROM. 4130 * 4131 * @eeprom: where to store the data 4132 * @io_port: the base io port 4133 **/ 4134static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4135{ 4136 u8 *b_eeprom = (u8 *)eeprom; 4137 u8 addr; 4138 4139 /* Enable SEEPROM */ 4140 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4141 io_port + TRM_S1040_GEN_CONTROL); 4142 4143 /* read details */ 4144 for (addr = 0; addr < 128; addr++, b_eeprom++) 4145 *b_eeprom = trms1040_get_data(io_port, addr); 4146 4147 /* Disable SEEPROM */ 4148 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4149 io_port + TRM_S1040_GEN_CONTROL); 4150} 4151 4152 4153 4154/** 4155 * check_eeprom - get and check contents of the eeprom 4156 * 4157 * Read seeprom 128 bytes into the memory provider in eeprom. 4158 * Checks the checksum and if it's not correct it uses a set of default 4159 * values. 4160 * 4161 * @eeprom: caller allocated strcuture to read the eeprom data into 4162 * @io_port: io port to read from 4163 **/ 4164static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4165{ 4166 u16 *w_eeprom = (u16 *)eeprom; 4167 u16 w_addr; 4168 u16 cksum; 4169 u32 d_addr; 4170 u32 *d_eeprom; 4171 4172 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4173 4174 cksum = 0; 4175 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4176 w_addr++, w_eeprom++) 4177 cksum += *w_eeprom; 4178 if (cksum != 0x1234) { 4179 /* 4180 * Checksum is wrong. 4181 * Load a set of defaults into the eeprom buffer 4182 */ 4183 dprintkl(KERN_WARNING, 4184 "EEProm checksum error: using default values and options.\n"); 4185 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4186 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4187 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4188 eeprom->sub_sys_id[1] = 4189 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4190 eeprom->sub_class = 0x00; 4191 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4192 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4193 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4194 eeprom->device_id[1] = 4195 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4196 eeprom->reserved = 0x00; 4197 4198 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4199 d_addr < 16; d_addr++, d_eeprom++) 4200 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4201 4202 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4203 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4204 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4205 *d_eeprom = 0x00; 4206 4207 /* Now load defaults (maybe set by boot/module params) */ 4208 set_safe_settings(); 4209 fix_settings(); 4210 eeprom_override(eeprom); 4211 4212 eeprom->cksum = 0x00; 4213 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4214 w_addr < 63; w_addr++, w_eeprom++) 4215 cksum += *w_eeprom; 4216 4217 *w_eeprom = 0x1234 - cksum; 4218 trms1040_write_all(eeprom, io_port); 4219 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4220 } else { 4221 set_safe_settings(); 4222 eeprom_index_to_delay(eeprom); 4223 eeprom_override(eeprom); 4224 } 4225} 4226 4227 4228/** 4229 * print_eeprom_settings - output the eeprom settings 4230 * to the kernel log so people can see what they were. 4231 * 4232 * @eeprom: The eeprom data strucutre to show details for. 4233 **/ 4234static void __devinit print_eeprom_settings(struct NvRamType *eeprom) 4235{ 4236 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4237 eeprom->scsi_id, 4238 eeprom->target[0].period, 4239 clock_speed[eeprom->target[0].period] / 10, 4240 clock_speed[eeprom->target[0].period] % 10, 4241 eeprom->target[0].cfg0); 4242 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4243 eeprom->channel_cfg, eeprom->max_tag, 4244 1 << eeprom->max_tag, eeprom->delay_time); 4245} 4246 4247 4248/* Free SG tables */ 4249static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4250{ 4251 int i; 4252 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4253 4254 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4255 kfree(acb->srb_array[i].segment_x); 4256} 4257 4258 4259/* 4260 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4261 * should never cross a page boundary */ 4262static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4263{ 4264 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4265 *SEGMENTX_LEN; 4266 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4267 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4268 int srb_idx = 0; 4269 unsigned i = 0; 4270 struct SGentry *ptr; 4271 4272 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4273 acb->srb_array[i].segment_x = NULL; 4274 4275 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4276 while (pages--) { 4277 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); 4278 if (!ptr) { 4279 adapter_sg_tables_free(acb); 4280 return 1; 4281 } 4282 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4283 PAGE_SIZE, ptr, srb_idx); 4284 i = 0; 4285 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4286 acb->srb_array[srb_idx++].segment_x = 4287 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4288 } 4289 if (i < srbs_per_page) 4290 acb->srb.segment_x = 4291 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4292 else 4293 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4294 return 0; 4295} 4296 4297 4298 4299/** 4300 * adapter_print_config - print adapter connection and termination 4301 * config 4302 * 4303 * The io port in the adapter needs to have been set before calling 4304 * this function. 4305 * 4306 * @acb: The adapter to print the information for. 4307 **/ 4308static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) 4309{ 4310 u8 bval; 4311 4312 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4313 dprintkl(KERN_INFO, "%sConnectors: ", 4314 ((bval & WIDESCSI) ? "(Wide) " : "")); 4315 if (!(bval & CON5068)) 4316 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4317 if (!(bval & CON68)) 4318 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4319 if (!(bval & CON50)) 4320 printk("int50 "); 4321 if ((bval & (CON5068 | CON50 | CON68)) == 4322 0 /*(CON5068 | CON50 | CON68) */ ) 4323 printk(" Oops! (All 3?) "); 4324 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4325 printk(" Termination: "); 4326 if (bval & DIS_TERM) 4327 printk("Disabled\n"); 4328 else { 4329 if (bval & AUTOTERM) 4330 printk("Auto "); 4331 if (bval & LOW8TERM) 4332 printk("Low "); 4333 if (bval & UP8TERM) 4334 printk("High "); 4335 printk("\n"); 4336 } 4337} 4338 4339 4340/** 4341 * adapter_init_params - Initialize the various parameters in the 4342 * adapter structure. Note that the pointer to the scsi_host is set 4343 * early (when this instance is created) and the io_port and irq 4344 * values are set later after they have been reserved. This just gets 4345 * everything set to a good starting position. 4346 * 4347 * The eeprom structure in the adapter needs to have been set before 4348 * calling this function. 4349 * 4350 * @acb: The adapter to initialize. 4351 **/ 4352static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) 4353{ 4354 struct NvRamType *eeprom = &acb->eeprom; 4355 int i; 4356 4357 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4358 /* NOTE: acb->io_port_base is set at port registration time */ 4359 /* NOTE: acb->io_port_len is set at port registration time */ 4360 4361 INIT_LIST_HEAD(&acb->dcb_list); 4362 acb->dcb_run_robin = NULL; 4363 acb->active_dcb = NULL; 4364 4365 INIT_LIST_HEAD(&acb->srb_free_list); 4366 /* temp SRB for Q tag used or abort command used */ 4367 acb->tmp_srb = &acb->srb; 4368 init_timer(&acb->waiting_timer); 4369 init_timer(&acb->selto_timer); 4370 4371 acb->srb_count = DC395x_MAX_SRB_CNT; 4372 4373 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4374 /* NOTE: acb->irq_level is set at IRQ registration time */ 4375 4376 acb->tag_max_num = 1 << eeprom->max_tag; 4377 if (acb->tag_max_num > 30) 4378 acb->tag_max_num = 30; 4379 4380 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4381 acb->gmode2 = eeprom->channel_cfg; 4382 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4383 4384 if (eeprom->channel_cfg & NAC_SCANLUN) 4385 acb->lun_chk = 1; 4386 acb->scan_devices = 1; 4387 4388 acb->scsi_host->this_id = eeprom->scsi_id; 4389 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4390 4391 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4392 acb->dcb_map[i] = 0; 4393 4394 acb->msg_len = 0; 4395 4396 /* link static array of srbs into the srb free list */ 4397 for (i = 0; i < acb->srb_count - 1; i++) 4398 srb_free_insert(acb, &acb->srb_array[i]); 4399} 4400 4401 4402/** 4403 * adapter_init_host - Initialize the scsi host instance based on 4404 * values that we have already stored in the adapter instance. There's 4405 * some mention that a lot of these are deprecated, so we won't use 4406 * them (we'll use the ones in the adapter instance) but we'll fill 4407 * them in in case something else needs them. 4408 * 4409 * The eeprom structure, irq and io ports in the adapter need to have 4410 * been set before calling this function. 4411 * 4412 * @host: The scsi host instance to fill in the values for. 4413 **/ 4414static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) 4415{ 4416 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4417 struct NvRamType *eeprom = &acb->eeprom; 4418 4419 host->max_cmd_len = 24; 4420 host->can_queue = DC395x_MAX_CMD_QUEUE; 4421 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4422 host->this_id = (int)eeprom->scsi_id; 4423 host->io_port = acb->io_port_base; 4424 host->n_io_port = acb->io_port_len; 4425 host->dma_channel = -1; 4426 host->unique_id = acb->io_port_base; 4427 host->irq = acb->irq_level; 4428 host->last_reset = jiffies; 4429 4430 host->max_id = 16; 4431 if (host->max_id - 1 == eeprom->scsi_id) 4432 host->max_id--; 4433 4434#ifdef CONFIG_SCSI_MULTI_LUN 4435 if (eeprom->channel_cfg & NAC_SCANLUN) 4436 host->max_lun = 8; 4437 else 4438 host->max_lun = 1; 4439#else 4440 host->max_lun = 1; 4441#endif 4442 4443} 4444 4445 4446/** 4447 * adapter_init_chip - Get the chip into a know state and figure out 4448 * some of the settings that apply to this adapter. 4449 * 4450 * The io port in the adapter needs to have been set before calling 4451 * this function. The config will be configured correctly on return. 4452 * 4453 * @acb: The adapter which we are to init. 4454 **/ 4455static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) 4456{ 4457 struct NvRamType *eeprom = &acb->eeprom; 4458 4459 /* Mask all the interrupt */ 4460 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4461 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4462 4463 /* Reset SCSI module */ 4464 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4465 4466 /* Reset PCI/DMA module */ 4467 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4468 udelay(20); 4469 4470 /* program configuration 0 */ 4471 acb->config = HCC_AUTOTERM | HCC_PARITY; 4472 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4473 acb->config |= HCC_WIDE_CARD; 4474 4475 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4476 acb->config |= HCC_SCSI_RESET; 4477 4478 if (acb->config & HCC_SCSI_RESET) { 4479 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4480 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4481 4482 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4483 /*spin_unlock_irq (&io_request_lock); */ 4484 udelay(500); 4485 4486 acb->scsi_host->last_reset = 4487 jiffies + HZ / 2 + 4488 HZ * acb->eeprom.delay_time; 4489 4490 /*spin_lock_irq (&io_request_lock); */ 4491 } 4492} 4493 4494 4495/** 4496 * init_adapter - Grab the resource for the card, setup the adapter 4497 * information, set the card into a known state, create the various 4498 * tables etc etc. This basically gets all adapter information all up 4499 * to date, intialised and gets the chip in sync with it. 4500 * 4501 * @host: This hosts adapter structure 4502 * @io_port: The base I/O port 4503 * @irq: IRQ 4504 * 4505 * Returns 0 if the initialization succeeds, any other value on 4506 * failure. 4507 **/ 4508static int __devinit adapter_init(struct AdapterCtlBlk *acb, 4509 unsigned long io_port, u32 io_port_len, unsigned int irq) 4510{ 4511 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4512 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4513 goto failed; 4514 } 4515 /* store port base to indicate we have registered it */ 4516 acb->io_port_base = io_port; 4517 acb->io_port_len = io_port_len; 4518 4519 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { 4520 /* release the region we just claimed */ 4521 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4522 goto failed; 4523 } 4524 /* store irq to indicate we have registered it */ 4525 acb->irq_level = irq; 4526 4527 /* get eeprom configuration information and command line settings etc */ 4528 check_eeprom(&acb->eeprom, io_port); 4529 print_eeprom_settings(&acb->eeprom); 4530 4531 /* setup adapter control block */ 4532 adapter_init_params(acb); 4533 4534 /* display card connectors/termination settings */ 4535 adapter_print_config(acb); 4536 4537 if (adapter_sg_tables_alloc(acb)) { 4538 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4539 goto failed; 4540 } 4541 adapter_init_scsi_host(acb->scsi_host); 4542 adapter_init_chip(acb); 4543 set_basic_config(acb); 4544 4545 dprintkdbg(DBG_0, 4546 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4547 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4548 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4549 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4550 return 0; 4551 4552failed: 4553 if (acb->irq_level) 4554 free_irq(acb->irq_level, acb); 4555 if (acb->io_port_base) 4556 release_region(acb->io_port_base, acb->io_port_len); 4557 adapter_sg_tables_free(acb); 4558 4559 return 1; 4560} 4561 4562 4563/** 4564 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4565 * stopping all operations and disabling interrupt generation on the 4566 * card. 4567 * 4568 * @acb: The adapter which we are to shutdown. 4569 **/ 4570static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4571{ 4572 /* disable interrupts */ 4573 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4574 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4575 4576 /* reset the scsi bus */ 4577 if (acb->config & HCC_SCSI_RESET) 4578 reset_scsi_bus(acb); 4579 4580 /* clear any pending interrupt state */ 4581 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4582} 4583 4584 4585 4586/** 4587 * adapter_uninit - Shut down the chip and release any resources that 4588 * we had allocated. Once this returns the adapter should not be used 4589 * anymore. 4590 * 4591 * @acb: The adapter which we are to un-initialize. 4592 **/ 4593static void adapter_uninit(struct AdapterCtlBlk *acb) 4594{ 4595 unsigned long flags; 4596 DC395x_LOCK_IO(acb->scsi_host, flags); 4597 4598 /* remove timers */ 4599 if (timer_pending(&acb->waiting_timer)) 4600 del_timer(&acb->waiting_timer); 4601 if (timer_pending(&acb->selto_timer)) 4602 del_timer(&acb->selto_timer); 4603 4604 adapter_uninit_chip(acb); 4605 adapter_remove_and_free_all_devices(acb); 4606 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4607 4608 if (acb->irq_level) 4609 free_irq(acb->irq_level, acb); 4610 if (acb->io_port_base) 4611 release_region(acb->io_port_base, acb->io_port_len); 4612 4613 adapter_sg_tables_free(acb); 4614} 4615 4616 4617#undef SPRINTF 4618#define SPRINTF(args...) pos += sprintf(pos, args) 4619 4620#undef YESNO 4621#define YESNO(YN) \ 4622 if (YN) SPRINTF(" Yes ");\ 4623 else SPRINTF(" No ") 4624 4625static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, 4626 char **start, off_t offset, int length, int inout) 4627{ 4628 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4629 int spd, spd1; 4630 char *pos = buffer; 4631 struct DeviceCtlBlk *dcb; 4632 unsigned long flags; 4633 int dev; 4634 4635 if (inout) /* Has data been written to the file ? */ 4636 return -EPERM; 4637 4638 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4639 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4640 4641 DC395x_LOCK_IO(acb->scsi_host, flags); 4642 4643 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4644 SPRINTF("DC395U/UW/F DC315/U %s\n", 4645 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4646 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4647 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4648 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4649 4650 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); 4651 SPRINTF("AdapterID %i\n", host->this_id); 4652 4653 SPRINTF("tag_max_num %i", acb->tag_max_num); 4654 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4655 SPRINTF(", FilterCfg 0x%02x", 4656 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4657 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4658 /*SPRINTF("\n"); */ 4659 4660 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4661 SPRINTF 4662 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4663 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4664 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4665 acb->dcb_map[6], acb->dcb_map[7]); 4666 SPRINTF 4667 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4668 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4669 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4670 acb->dcb_map[14], acb->dcb_map[15]); 4671 4672 SPRINTF 4673 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4674 4675 dev = 0; 4676 list_for_each_entry(dcb, &acb->dcb_list, list) { 4677 int nego_period; 4678 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4679 dcb->target_lun); 4680 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4681 YESNO(dcb->sync_offset); 4682 YESNO(dcb->sync_period & WIDE_SYNC); 4683 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4684 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4685 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4686 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4687 if (dcb->sync_offset) 4688 SPRINTF(" %03i ns ", nego_period); 4689 else 4690 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4691 4692 if (dcb->sync_offset & 0x0f) { 4693 spd = 1000 / (nego_period); 4694 spd1 = 1000 % (nego_period); 4695 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4696 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4697 (dcb->sync_offset & 0x0f)); 4698 } else 4699 SPRINTF(" "); 4700 4701 /* Add more info ... */ 4702 SPRINTF(" %02i\n", dcb->max_command); 4703 dev++; 4704 } 4705 4706 if (timer_pending(&acb->waiting_timer)) 4707 SPRINTF("Waiting queue timer running\n"); 4708 else 4709 SPRINTF("\n"); 4710 4711 list_for_each_entry(dcb, &acb->dcb_list, list) { 4712 struct ScsiReqBlk *srb; 4713 if (!list_empty(&dcb->srb_waiting_list)) 4714 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4715 dcb->target_id, dcb->target_lun, 4716 list_size(&dcb->srb_waiting_list)); 4717 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4718 SPRINTF(" %li", srb->cmd->serial_number); 4719 if (!list_empty(&dcb->srb_going_list)) 4720 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4721 dcb->target_id, dcb->target_lun, 4722 list_size(&dcb->srb_going_list)); 4723 list_for_each_entry(srb, &dcb->srb_going_list, list) 4724 SPRINTF(" %li", srb->cmd->serial_number); 4725 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4726 SPRINTF("\n"); 4727 } 4728 4729 if (debug_enabled(DBG_1)) { 4730 SPRINTF("DCB list for ACB %p:\n", acb); 4731 list_for_each_entry(dcb, &acb->dcb_list, list) { 4732 SPRINTF("%p -> ", dcb); 4733 } 4734 SPRINTF("END\n"); 4735 } 4736 4737 *start = buffer + offset; 4738 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4739 4740 if (pos - buffer < offset) 4741 return 0; 4742 else if (pos - buffer - offset < length) 4743 return pos - buffer - offset; 4744 else 4745 return length; 4746} 4747 4748 4749static struct scsi_host_template dc395x_driver_template = { 4750 .module = THIS_MODULE, 4751 .proc_name = DC395X_NAME, 4752 .proc_info = dc395x_proc_info, 4753 .name = DC395X_BANNER " " DC395X_VERSION, 4754 .queuecommand = dc395x_queue_command, 4755 .bios_param = dc395x_bios_param, 4756 .slave_alloc = dc395x_slave_alloc, 4757 .slave_destroy = dc395x_slave_destroy, 4758 .can_queue = DC395x_MAX_CAN_QUEUE, 4759 .this_id = 7, 4760 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4761 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4762 .eh_abort_handler = dc395x_eh_abort, 4763 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4764 .unchecked_isa_dma = 0, 4765 .use_clustering = DISABLE_CLUSTERING, 4766 .use_sg_chaining = ENABLE_SG_CHAINING, 4767}; 4768 4769 4770/** 4771 * banner_display - Display banner on first instance of driver 4772 * initialized. 4773 **/ 4774static void banner_display(void) 4775{ 4776 static int banner_done = 0; 4777 if (!banner_done) 4778 { 4779 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4780 banner_done = 1; 4781 } 4782} 4783 4784 4785/** 4786 * dc395x_init_one - Initialise a single instance of the adapter. 4787 * 4788 * The PCI layer will call this once for each instance of the adapter 4789 * that it finds in the system. The pci_dev strcuture indicates which 4790 * instance we are being called from. 4791 * 4792 * @dev: The PCI device to intialize. 4793 * @id: Looks like a pointer to the entry in our pci device table 4794 * that was actually matched by the PCI subsystem. 4795 * 4796 * Returns 0 on success, or an error code (-ve) on failure. 4797 **/ 4798static int __devinit dc395x_init_one(struct pci_dev *dev, 4799 const struct pci_device_id *id) 4800{ 4801 struct Scsi_Host *scsi_host = NULL; 4802 struct AdapterCtlBlk *acb = NULL; 4803 unsigned long io_port_base; 4804 unsigned int io_port_len; 4805 unsigned int irq; 4806 4807 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4808 banner_display(); 4809 4810 if (pci_enable_device(dev)) 4811 { 4812 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4813 return -ENODEV; 4814 } 4815 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4816 io_port_len = pci_resource_len(dev, 0); 4817 irq = dev->irq; 4818 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4819 4820 /* allocate scsi host information (includes out adapter) */ 4821 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4822 sizeof(struct AdapterCtlBlk)); 4823 if (!scsi_host) { 4824 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4825 goto fail; 4826 } 4827 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4828 acb->scsi_host = scsi_host; 4829 acb->dev = dev; 4830 4831 /* initialise the adapter and everything we need */ 4832 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4833 dprintkl(KERN_INFO, "adapter init failed\n"); 4834 goto fail; 4835 } 4836 4837 pci_set_master(dev); 4838 4839 /* get the scsi mid level to scan for new devices on the bus */ 4840 if (scsi_add_host(scsi_host, &dev->dev)) { 4841 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4842 goto fail; 4843 } 4844 pci_set_drvdata(dev, scsi_host); 4845 scsi_scan_host(scsi_host); 4846 4847 return 0; 4848 4849fail: 4850 if (acb != NULL) 4851 adapter_uninit(acb); 4852 if (scsi_host != NULL) 4853 scsi_host_put(scsi_host); 4854 pci_disable_device(dev); 4855 return -ENODEV; 4856} 4857 4858 4859/** 4860 * dc395x_remove_one - Called to remove a single instance of the 4861 * adapter. 4862 * 4863 * @dev: The PCI device to intialize. 4864 **/ 4865static void __devexit dc395x_remove_one(struct pci_dev *dev) 4866{ 4867 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4868 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4869 4870 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4871 4872 scsi_remove_host(scsi_host); 4873 adapter_uninit(acb); 4874 pci_disable_device(dev); 4875 scsi_host_put(scsi_host); 4876 pci_set_drvdata(dev, NULL); 4877} 4878 4879 4880static struct pci_device_id dc395x_pci_table[] = { 4881 { 4882 .vendor = PCI_VENDOR_ID_TEKRAM, 4883 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4884 .subvendor = PCI_ANY_ID, 4885 .subdevice = PCI_ANY_ID, 4886 }, 4887 {} /* Terminating entry */ 4888}; 4889MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4890 4891 4892static struct pci_driver dc395x_driver = { 4893 .name = DC395X_NAME, 4894 .id_table = dc395x_pci_table, 4895 .probe = dc395x_init_one, 4896 .remove = __devexit_p(dc395x_remove_one), 4897}; 4898 4899 4900/** 4901 * dc395x_module_init - Module initialization function 4902 * 4903 * Used by both module and built-in driver to initialise this driver. 4904 **/ 4905static int __init dc395x_module_init(void) 4906{ 4907 return pci_register_driver(&dc395x_driver); 4908} 4909 4910 4911/** 4912 * dc395x_module_exit - Module cleanup function. 4913 **/ 4914static void __exit dc395x_module_exit(void) 4915{ 4916 pci_unregister_driver(&dc395x_driver); 4917} 4918 4919 4920module_init(dc395x_module_init); 4921module_exit(dc395x_module_exit); 4922 4923MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4924MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4925MODULE_LICENSE("GPL"); 4926