dc395x.c revision 59c51591a0ac7568824f541f57de967e88adaa07
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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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->pid, 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 enum dma_data_direction dir = cmd->sc_data_direction; 983 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", 984 cmd->pid, dcb->target_id, dcb->target_lun); 985 986 srb->dcb = dcb; 987 srb->cmd = cmd; 988 srb->sg_count = 0; 989 srb->total_xfer_length = 0; 990 srb->sg_bus_addr = 0; 991 srb->sg_index = 0; 992 srb->adapter_status = 0; 993 srb->target_status = 0; 994 srb->msg_count = 0; 995 srb->status = 0; 996 srb->flag = 0; 997 srb->state = 0; 998 srb->retry_count = 0; 999 srb->tag_number = TAG_NONE; 1000 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1001 srb->end_message = 0; 1002 1003 if (dir == PCI_DMA_NONE || !cmd->request_buffer) { 1004 dprintkdbg(DBG_0, 1005 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1006 cmd->bufflen, cmd->request_buffer, 1007 cmd->use_sg, srb->segment_x[0].address); 1008 } else if (cmd->use_sg) { 1009 int i; 1010 u32 reqlen = cmd->request_bufflen; 1011 struct scatterlist *sl = (struct scatterlist *) 1012 cmd->request_buffer; 1013 struct SGentry *sgp = srb->segment_x; 1014 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, 1015 dir); 1016 dprintkdbg(DBG_0, 1017 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1018 reqlen, cmd->request_buffer, cmd->use_sg, 1019 srb->sg_count); 1020 1021 for (i = 0; i < srb->sg_count; i++) { 1022 u32 busaddr = (u32)sg_dma_address(&sl[i]); 1023 u32 seglen = (u32)sl[i].length; 1024 sgp[i].address = busaddr; 1025 sgp[i].length = seglen; 1026 srb->total_xfer_length += seglen; 1027 } 1028 sgp += srb->sg_count - 1; 1029 1030 /* 1031 * adjust last page if too big as it is allocated 1032 * on even page boundaries 1033 */ 1034 if (srb->total_xfer_length > reqlen) { 1035 sgp->length -= (srb->total_xfer_length - reqlen); 1036 srb->total_xfer_length = reqlen; 1037 } 1038 1039 /* Fixup for WIDE padding - make sure length is even */ 1040 if (dcb->sync_period & WIDE_SYNC && 1041 srb->total_xfer_length % 2) { 1042 srb->total_xfer_length++; 1043 sgp->length++; 1044 } 1045 1046 srb->sg_bus_addr = pci_map_single(dcb->acb->dev, 1047 srb->segment_x, 1048 SEGMENTX_LEN, 1049 PCI_DMA_TODEVICE); 1050 1051 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 1052 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 1053 } else { 1054 srb->total_xfer_length = cmd->request_bufflen; 1055 srb->sg_count = 1; 1056 srb->segment_x[0].address = 1057 pci_map_single(dcb->acb->dev, cmd->request_buffer, 1058 srb->total_xfer_length, dir); 1059 1060 /* Fixup for WIDE padding - make sure length is even */ 1061 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) 1062 srb->total_xfer_length++; 1063 1064 srb->segment_x[0].length = srb->total_xfer_length; 1065 1066 dprintkdbg(DBG_0, 1067 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", 1068 srb->total_xfer_length, cmd->request_buffer, 1069 cmd->use_sg, srb->segment_x[0].address); 1070 } 1071 1072 srb->request_length = srb->total_xfer_length; 1073} 1074 1075 1076/** 1077 * dc395x_queue_command - queue scsi command passed from the mid 1078 * layer, invoke 'done' on completion 1079 * 1080 * @cmd: pointer to scsi command object 1081 * @done: function pointer to be invoked on completion 1082 * 1083 * Returns 1 if the adapter (host) is busy, else returns 0. One 1084 * reason for an adapter to be busy is that the number 1085 * of outstanding queued commands is already equal to 1086 * struct Scsi_Host::can_queue . 1087 * 1088 * Required: if struct Scsi_Host::can_queue is ever non-zero 1089 * then this function is required. 1090 * 1091 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1092 * and is expected to be held on return. 1093 * 1094 **/ 1095static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1096{ 1097 struct DeviceCtlBlk *dcb; 1098 struct ScsiReqBlk *srb; 1099 struct AdapterCtlBlk *acb = 1100 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1101 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", 1102 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 1103 1104 /* Assume BAD_TARGET; will be cleared later */ 1105 cmd->result = DID_BAD_TARGET << 16; 1106 1107 /* ignore invalid targets */ 1108 if (cmd->device->id >= acb->scsi_host->max_id || 1109 cmd->device->lun >= acb->scsi_host->max_lun || 1110 cmd->device->lun >31) { 1111 goto complete; 1112 } 1113 1114 /* does the specified lun on the specified device exist */ 1115 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1116 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1117 cmd->device->id, cmd->device->lun); 1118 goto complete; 1119 } 1120 1121 /* do we have a DCB for the device */ 1122 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1123 if (!dcb) { 1124 /* should never happen */ 1125 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1126 cmd->device->id, cmd->device->lun); 1127 goto complete; 1128 } 1129 1130 /* set callback and clear result in the command */ 1131 cmd->scsi_done = done; 1132 cmd->result = 0; 1133 1134 srb = srb_get_free(acb); 1135 if (!srb) 1136 { 1137 /* 1138 * Return 1 since we are unable to queue this command at this 1139 * point in time. 1140 */ 1141 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1142 return 1; 1143 } 1144 1145 build_srb(cmd, dcb, srb); 1146 1147 if (!list_empty(&dcb->srb_waiting_list)) { 1148 /* append to waiting queue */ 1149 srb_waiting_append(dcb, srb); 1150 waiting_process_next(acb); 1151 } else { 1152 /* process immediately */ 1153 send_srb(acb, srb); 1154 } 1155 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid); 1156 return 0; 1157 1158complete: 1159 /* 1160 * Complete the command immediatey, and then return 0 to 1161 * indicate that we have handled the command. This is usually 1162 * done when the commad is for things like non existent 1163 * devices. 1164 */ 1165 done(cmd); 1166 return 0; 1167} 1168 1169 1170/* 1171 * Return the disk geometry for the given SCSI device. 1172 */ 1173static int dc395x_bios_param(struct scsi_device *sdev, 1174 struct block_device *bdev, sector_t capacity, int *info) 1175{ 1176#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1177 int heads, sectors, cylinders; 1178 struct AdapterCtlBlk *acb; 1179 int size = capacity; 1180 1181 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1182 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1183 heads = 64; 1184 sectors = 32; 1185 cylinders = size / (heads * sectors); 1186 1187 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1188 heads = 255; 1189 sectors = 63; 1190 cylinders = size / (heads * sectors); 1191 } 1192 geom[0] = heads; 1193 geom[1] = sectors; 1194 geom[2] = cylinders; 1195 return 0; 1196#else 1197 return scsicam_bios_param(bdev, capacity, info); 1198#endif 1199} 1200 1201 1202static void dump_register_info(struct AdapterCtlBlk *acb, 1203 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1204{ 1205 u16 pstat; 1206 struct pci_dev *dev = acb->dev; 1207 pci_read_config_word(dev, PCI_STATUS, &pstat); 1208 if (!dcb) 1209 dcb = acb->active_dcb; 1210 if (!srb && dcb) 1211 srb = dcb->active_srb; 1212 if (srb) { 1213 if (!srb->cmd) 1214 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1215 srb, srb->cmd); 1216 else 1217 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " 1218 "cmnd=0x%02x <%02i-%i>\n", 1219 srb, srb->cmd, srb->cmd->pid, 1220 srb->cmd->cmnd[0], srb->cmd->device->id, 1221 srb->cmd->device->lun); 1222 printk(" sglist=%p cnt=%i idx=%i len=%zu\n", 1223 srb->segment_x, srb->sg_count, srb->sg_index, 1224 srb->total_xfer_length); 1225 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1226 srb->state, srb->status, srb->scsi_phase, 1227 (acb->active_dcb) ? "" : "not"); 1228 } 1229 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1230 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1231 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1232 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1233 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1234 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1235 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1236 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1237 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1238 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1239 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1240 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1241 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1242 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1243 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1244 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1245 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1246 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1247 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1248 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1249 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1250 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1251 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1252 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1253 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1254 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1255 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1256 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1257 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1258 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1259 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1260 "pci{status=0x%04x}\n", 1261 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1262 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1263 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1264 pstat); 1265} 1266 1267 1268static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1269{ 1270#if debug_enabled(DBG_FIFO) 1271 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1272 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1273 if (!(fifocnt & 0x40)) 1274 dprintkdbg(DBG_FIFO, 1275 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1276 fifocnt & 0x3f, lines, txt); 1277#endif 1278 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1279} 1280 1281 1282static void reset_dev_param(struct AdapterCtlBlk *acb) 1283{ 1284 struct DeviceCtlBlk *dcb; 1285 struct NvRamType *eeprom = &acb->eeprom; 1286 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1287 1288 list_for_each_entry(dcb, &acb->dcb_list, list) { 1289 u8 period_index; 1290 1291 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1292 dcb->sync_period = 0; 1293 dcb->sync_offset = 0; 1294 1295 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1296 period_index = eeprom->target[dcb->target_id].period & 0x07; 1297 dcb->min_nego_period = clock_period[period_index]; 1298 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1299 || !(acb->config & HCC_WIDE_CARD)) 1300 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1301 } 1302} 1303 1304 1305/* 1306 * perform a hard reset on the SCSI bus 1307 * @cmd - some command for this host (for fetching hooks) 1308 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1309 */ 1310static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1311{ 1312 struct AdapterCtlBlk *acb = 1313 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1314 dprintkl(KERN_INFO, 1315 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", 1316 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1317 1318 if (timer_pending(&acb->waiting_timer)) 1319 del_timer(&acb->waiting_timer); 1320 1321 /* 1322 * disable interrupt 1323 */ 1324 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1325 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1326 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1327 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1328 1329 reset_scsi_bus(acb); 1330 udelay(500); 1331 1332 /* We may be in serious trouble. Wait some seconds */ 1333 acb->scsi_host->last_reset = 1334 jiffies + 3 * HZ / 2 + 1335 HZ * acb->eeprom.delay_time; 1336 1337 /* 1338 * re-enable interrupt 1339 */ 1340 /* Clear SCSI FIFO */ 1341 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1342 clear_fifo(acb, "eh_bus_reset"); 1343 /* Delete pending IRQ */ 1344 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1345 set_basic_config(acb); 1346 1347 reset_dev_param(acb); 1348 doing_srb_done(acb, DID_RESET, cmd, 0); 1349 acb->active_dcb = NULL; 1350 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1351 waiting_process_next(acb); 1352 1353 return SUCCESS; 1354} 1355 1356static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1357{ 1358 int rc; 1359 1360 spin_lock_irq(cmd->device->host->host_lock); 1361 rc = __dc395x_eh_bus_reset(cmd); 1362 spin_unlock_irq(cmd->device->host->host_lock); 1363 1364 return rc; 1365} 1366 1367/* 1368 * abort an errant SCSI command 1369 * @cmd - command to be aborted 1370 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1371 */ 1372static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1373{ 1374 /* 1375 * Look into our command queues: If it has not been sent already, 1376 * we remove it and return success. Otherwise fail. 1377 */ 1378 struct AdapterCtlBlk *acb = 1379 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1380 struct DeviceCtlBlk *dcb; 1381 struct ScsiReqBlk *srb; 1382 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", 1383 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1384 1385 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1386 if (!dcb) { 1387 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1388 return FAILED; 1389 } 1390 1391 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1392 if (srb) { 1393 srb_waiting_remove(dcb, srb); 1394 pci_unmap_srb_sense(acb, srb); 1395 pci_unmap_srb(acb, srb); 1396 free_tag(dcb, srb); 1397 srb_free_insert(acb, srb); 1398 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1399 cmd->result = DID_ABORT << 16; 1400 return SUCCESS; 1401 } 1402 srb = find_cmd(cmd, &dcb->srb_going_list); 1403 if (srb) { 1404 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); 1405 /* XXX: Should abort the command here */ 1406 } else { 1407 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); 1408 } 1409 return FAILED; 1410} 1411 1412 1413/* SDTR */ 1414static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1415 struct ScsiReqBlk *srb) 1416{ 1417 u8 *ptr = srb->msgout_buf + srb->msg_count; 1418 if (srb->msg_count > 1) { 1419 dprintkl(KERN_INFO, 1420 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1421 srb->msg_count, srb->msgout_buf[0], 1422 srb->msgout_buf[1]); 1423 return; 1424 } 1425 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1426 dcb->sync_offset = 0; 1427 dcb->min_nego_period = 200 >> 2; 1428 } else if (dcb->sync_offset == 0) 1429 dcb->sync_offset = SYNC_NEGO_OFFSET; 1430 1431 *ptr++ = MSG_EXTENDED; /* (01h) */ 1432 *ptr++ = 3; /* length */ 1433 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1434 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1435 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1436 srb->msg_count += 5; 1437 srb->state |= SRB_DO_SYNC_NEGO; 1438} 1439 1440 1441/* WDTR */ 1442static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1443 struct ScsiReqBlk *srb) 1444{ 1445 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1446 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1447 u8 *ptr = srb->msgout_buf + srb->msg_count; 1448 if (srb->msg_count > 1) { 1449 dprintkl(KERN_INFO, 1450 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1451 srb->msg_count, srb->msgout_buf[0], 1452 srb->msgout_buf[1]); 1453 return; 1454 } 1455 *ptr++ = MSG_EXTENDED; /* (01h) */ 1456 *ptr++ = 2; /* length */ 1457 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1458 *ptr++ = wide; 1459 srb->msg_count += 4; 1460 srb->state |= SRB_DO_WIDE_NEGO; 1461} 1462 1463 1464#if 0 1465/* Timer to work around chip flaw: When selecting and the bus is 1466 * busy, we sometimes miss a Selection timeout IRQ */ 1467void selection_timeout_missed(unsigned long ptr); 1468/* Sets the timer to wake us up */ 1469static void selto_timer(struct AdapterCtlBlk *acb) 1470{ 1471 if (timer_pending(&acb->selto_timer)) 1472 return; 1473 acb->selto_timer.function = selection_timeout_missed; 1474 acb->selto_timer.data = (unsigned long) acb; 1475 if (time_before 1476 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) 1477 acb->selto_timer.expires = 1478 acb->scsi_host->last_reset + HZ / 2 + 1; 1479 else 1480 acb->selto_timer.expires = jiffies + HZ + 1; 1481 add_timer(&acb->selto_timer); 1482} 1483 1484 1485void selection_timeout_missed(unsigned long ptr) 1486{ 1487 unsigned long flags; 1488 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1489 struct ScsiReqBlk *srb; 1490 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1491 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1492 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1493 return; 1494 } 1495 DC395x_LOCK_IO(acb->scsi_host, flags); 1496 srb = acb->active_dcb->active_srb; 1497 disconnect(acb); 1498 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1499} 1500#endif 1501 1502 1503static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1504 struct ScsiReqBlk* srb) 1505{ 1506 u16 s_stat2, return_code; 1507 u8 s_stat, scsicommand, i, identify_message; 1508 u8 *ptr; 1509 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", 1510 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 1511 1512 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1513 1514 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1515 s_stat2 = 0; 1516 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1517#if 1 1518 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1519 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", 1520 srb->cmd->pid, s_stat, s_stat2); 1521 /* 1522 * Try anyway? 1523 * 1524 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1525 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! 1526 * (This is likely to be a bug in the hardware. Obviously, most people 1527 * only have one initiator per SCSI bus.) 1528 * Instead let this fail and have the timer make sure the command is 1529 * tried again after a short time 1530 */ 1531 /*selto_timer (acb); */ 1532 return 1; 1533 } 1534#endif 1535 if (acb->active_dcb) { 1536 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" 1537 "command while another command (pid#%li) is active.", 1538 srb->cmd->pid, 1539 acb->active_dcb->active_srb ? 1540 acb->active_dcb->active_srb->cmd->pid : 0); 1541 return 1; 1542 } 1543 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1544 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", 1545 srb->cmd->pid); 1546 return 1; 1547 } 1548 /* Allow starting of SCSI commands half a second before we allow the mid-level 1549 * to queue them again after a reset */ 1550 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { 1551 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1552 return 1; 1553 } 1554 1555 /* Flush FIFO */ 1556 clear_fifo(acb, "start_scsi"); 1557 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1558 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1559 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1560 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1561 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1562 1563 identify_message = dcb->identify_msg; 1564 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1565 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1566 if (srb->flag & AUTO_REQSENSE) 1567 identify_message &= 0xBF; 1568 1569 if (((srb->cmd->cmnd[0] == INQUIRY) 1570 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1571 || (srb->flag & AUTO_REQSENSE)) 1572 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1573 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1574 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1575 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1576 && (dcb->target_lun == 0)) { 1577 srb->msgout_buf[0] = identify_message; 1578 srb->msg_count = 1; 1579 scsicommand = SCMD_SEL_ATNSTOP; 1580 srb->state = SRB_MSGOUT; 1581#ifndef SYNC_FIRST 1582 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1583 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1584 build_wdtr(acb, dcb, srb); 1585 goto no_cmd; 1586 } 1587#endif 1588 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1589 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1590 build_sdtr(acb, dcb, srb); 1591 goto no_cmd; 1592 } 1593 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1594 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1595 build_wdtr(acb, dcb, srb); 1596 goto no_cmd; 1597 } 1598 srb->msg_count = 0; 1599 } 1600 /* Send identify message */ 1601 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1602 1603 scsicommand = SCMD_SEL_ATN; 1604 srb->state = SRB_START_; 1605#ifndef DC395x_NO_TAGQ 1606 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1607 && (identify_message & 0xC0)) { 1608 /* Send Tag message */ 1609 u32 tag_mask = 1; 1610 u8 tag_number = 0; 1611 while (tag_mask & dcb->tag_mask 1612 && tag_number <= dcb->max_command) { 1613 tag_mask = tag_mask << 1; 1614 tag_number++; 1615 } 1616 if (tag_number >= dcb->max_command) { 1617 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " 1618 "Out of tags target=<%02i-%i>)\n", 1619 srb->cmd->pid, srb->cmd->device->id, 1620 srb->cmd->device->lun); 1621 srb->state = SRB_READY; 1622 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1623 DO_HWRESELECT); 1624 return 1; 1625 } 1626 /* Send Tag id */ 1627 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1628 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1629 dcb->tag_mask |= tag_mask; 1630 srb->tag_number = tag_number; 1631 scsicommand = SCMD_SEL_ATN3; 1632 srb->state = SRB_START_; 1633 } 1634#endif 1635/*polling:*/ 1636 /* Send CDB ..command block ......... */ 1637 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", 1638 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 1639 srb->cmd->cmnd[0], srb->tag_number); 1640 if (srb->flag & AUTO_REQSENSE) { 1641 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1642 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1643 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1644 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1645 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1646 sizeof(srb->cmd->sense_buffer)); 1647 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1648 } else { 1649 ptr = (u8 *)srb->cmd->cmnd; 1650 for (i = 0; i < srb->cmd->cmd_len; i++) 1651 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1652 } 1653 no_cmd: 1654 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1655 DO_HWRESELECT | DO_DATALATCH); 1656 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1657 /* 1658 * If start_scsi return 1: 1659 * we caught an interrupt (must be reset or reselection ... ) 1660 * : Let's process it first! 1661 */ 1662 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", 1663 srb->cmd->pid, dcb->target_id, dcb->target_lun); 1664 srb->state = SRB_READY; 1665 free_tag(dcb, srb); 1666 srb->msg_count = 0; 1667 return_code = 1; 1668 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1669 } else { 1670 /* 1671 * If start_scsi returns 0: 1672 * we know that the SCSI processor is free 1673 */ 1674 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1675 dcb->active_srb = srb; 1676 acb->active_dcb = dcb; 1677 return_code = 0; 1678 /* it's important for atn stop */ 1679 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1680 DO_DATALATCH | DO_HWRESELECT); 1681 /* SCSI command */ 1682 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1683 } 1684 return return_code; 1685} 1686 1687 1688#define DC395x_ENABLE_MSGOUT \ 1689 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1690 srb->state |= SRB_MSGOUT 1691 1692 1693/* abort command */ 1694static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1695 struct ScsiReqBlk *srb) 1696{ 1697 srb->msgout_buf[0] = ABORT; 1698 srb->msg_count = 1; 1699 DC395x_ENABLE_MSGOUT; 1700 srb->state &= ~SRB_MSGIN; 1701 srb->state |= SRB_MSGOUT; 1702} 1703 1704 1705/** 1706 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1707 * have been triggered for this card. 1708 * 1709 * @acb: a pointer to the adpter control block 1710 * @scsi_status: the status return when we checked the card 1711 **/ 1712static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1713 u16 scsi_status) 1714{ 1715 struct DeviceCtlBlk *dcb; 1716 struct ScsiReqBlk *srb; 1717 u16 phase; 1718 u8 scsi_intstatus; 1719 unsigned long flags; 1720 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1721 u16 *); 1722 1723 DC395x_LOCK_IO(acb->scsi_host, flags); 1724 1725 /* This acknowledges the IRQ */ 1726 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1727 if ((scsi_status & 0x2007) == 0x2002) 1728 dprintkl(KERN_DEBUG, 1729 "COP after COP completed? %04x\n", scsi_status); 1730 if (debug_enabled(DBG_KG)) { 1731 if (scsi_intstatus & INT_SELTIMEOUT) 1732 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1733 } 1734 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1735 1736 if (timer_pending(&acb->selto_timer)) 1737 del_timer(&acb->selto_timer); 1738 1739 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1740 disconnect(acb); /* bus free interrupt */ 1741 goto out_unlock; 1742 } 1743 if (scsi_intstatus & INT_RESELECTED) { 1744 reselect(acb); 1745 goto out_unlock; 1746 } 1747 if (scsi_intstatus & INT_SELECT) { 1748 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1749 goto out_unlock; 1750 } 1751 if (scsi_intstatus & INT_SCSIRESET) { 1752 scsi_reset_detect(acb); 1753 goto out_unlock; 1754 } 1755 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1756 dcb = acb->active_dcb; 1757 if (!dcb) { 1758 dprintkl(KERN_DEBUG, 1759 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1760 scsi_status, scsi_intstatus); 1761 goto out_unlock; 1762 } 1763 srb = dcb->active_srb; 1764 if (dcb->flag & ABORT_DEV_) { 1765 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1766 enable_msgout_abort(acb, srb); 1767 } 1768 1769 /* software sequential machine */ 1770 phase = (u16)srb->scsi_phase; 1771 1772 /* 1773 * 62037 or 62137 1774 * call dc395x_scsi_phase0[]... "phase entry" 1775 * handle every phase before start transfer 1776 */ 1777 /* data_out_phase0, phase:0 */ 1778 /* data_in_phase0, phase:1 */ 1779 /* command_phase0, phase:2 */ 1780 /* status_phase0, phase:3 */ 1781 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1782 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1783 /* msgout_phase0, phase:6 */ 1784 /* msgin_phase0, phase:7 */ 1785 dc395x_statev = dc395x_scsi_phase0[phase]; 1786 dc395x_statev(acb, srb, &scsi_status); 1787 1788 /* 1789 * if there were any exception occured scsi_status 1790 * will be modify to bus free phase new scsi_status 1791 * transfer out from ... previous dc395x_statev 1792 */ 1793 srb->scsi_phase = scsi_status & PHASEMASK; 1794 phase = (u16)scsi_status & PHASEMASK; 1795 1796 /* 1797 * call dc395x_scsi_phase1[]... "phase entry" handle 1798 * every phase to do transfer 1799 */ 1800 /* data_out_phase1, phase:0 */ 1801 /* data_in_phase1, phase:1 */ 1802 /* command_phase1, phase:2 */ 1803 /* status_phase1, phase:3 */ 1804 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1805 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1806 /* msgout_phase1, phase:6 */ 1807 /* msgin_phase1, phase:7 */ 1808 dc395x_statev = dc395x_scsi_phase1[phase]; 1809 dc395x_statev(acb, srb, &scsi_status); 1810 } 1811 out_unlock: 1812 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1813} 1814 1815 1816static irqreturn_t dc395x_interrupt(int irq, void *dev_id) 1817{ 1818 struct AdapterCtlBlk *acb = dev_id; 1819 u16 scsi_status; 1820 u8 dma_status; 1821 irqreturn_t handled = IRQ_NONE; 1822 1823 /* 1824 * Check for pending interupt 1825 */ 1826 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1827 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1828 if (scsi_status & SCSIINTERRUPT) { 1829 /* interupt pending - let's process it! */ 1830 dc395x_handle_interrupt(acb, scsi_status); 1831 handled = IRQ_HANDLED; 1832 } 1833 else if (dma_status & 0x20) { 1834 /* Error from the DMA engine */ 1835 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1836#if 0 1837 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1838 if (acb->active_dcb) { 1839 acb->active_dcb-> flag |= ABORT_DEV_; 1840 if (acb->active_dcb->active_srb) 1841 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1842 } 1843 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1844#else 1845 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1846 acb = NULL; 1847#endif 1848 handled = IRQ_HANDLED; 1849 } 1850 1851 return handled; 1852} 1853 1854 1855static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1856 u16 *pscsi_status) 1857{ 1858 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid); 1859 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1860 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1861 1862 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1863 srb->state &= ~SRB_MSGOUT; 1864} 1865 1866 1867static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1868 u16 *pscsi_status) 1869{ 1870 u16 i; 1871 u8 *ptr; 1872 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid); 1873 1874 clear_fifo(acb, "msgout_phase1"); 1875 if (!(srb->state & SRB_MSGOUT)) { 1876 srb->state |= SRB_MSGOUT; 1877 dprintkl(KERN_DEBUG, 1878 "msgout_phase1: (pid#%li) Phase unexpected\n", 1879 srb->cmd->pid); /* So what ? */ 1880 } 1881 if (!srb->msg_count) { 1882 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", 1883 srb->cmd->pid); 1884 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1885 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1886 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1887 return; 1888 } 1889 ptr = (u8 *)srb->msgout_buf; 1890 for (i = 0; i < srb->msg_count; i++) 1891 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1892 srb->msg_count = 0; 1893 if (srb->msgout_buf[0] == MSG_ABORT) 1894 srb->state = SRB_ABORT_SENT; 1895 1896 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1897} 1898 1899 1900static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1901 u16 *pscsi_status) 1902{ 1903 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid); 1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1905} 1906 1907 1908static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1909 u16 *pscsi_status) 1910{ 1911 struct DeviceCtlBlk *dcb; 1912 u8 *ptr; 1913 u16 i; 1914 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid); 1915 1916 clear_fifo(acb, "command_phase1"); 1917 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1918 if (!(srb->flag & AUTO_REQSENSE)) { 1919 ptr = (u8 *)srb->cmd->cmnd; 1920 for (i = 0; i < srb->cmd->cmd_len; i++) { 1921 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1922 ptr++; 1923 } 1924 } else { 1925 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1926 dcb = acb->active_dcb; 1927 /* target id */ 1928 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1929 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1930 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1931 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1932 sizeof(srb->cmd->sense_buffer)); 1933 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1934 } 1935 srb->state |= SRB_COMMAND; 1936 /* it's important for atn stop */ 1937 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1938 /* SCSI command */ 1939 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1940} 1941 1942 1943/* 1944 * Verify that the remaining space in the hw sg lists is the same as 1945 * the count of remaining bytes in srb->total_xfer_length 1946 */ 1947static void sg_verify_length(struct ScsiReqBlk *srb) 1948{ 1949 if (debug_enabled(DBG_SG)) { 1950 unsigned len = 0; 1951 unsigned idx = srb->sg_index; 1952 struct SGentry *psge = srb->segment_x + idx; 1953 for (; idx < srb->sg_count; psge++, idx++) 1954 len += psge->length; 1955 if (len != srb->total_xfer_length) 1956 dprintkdbg(DBG_SG, 1957 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1958 srb->total_xfer_length, len); 1959 } 1960} 1961 1962 1963/* 1964 * Compute the next Scatter Gather list index and adjust its length 1965 * and address if necessary 1966 */ 1967static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1968{ 1969 u8 idx; 1970 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ 1971 struct SGentry *psge = srb->segment_x + srb->sg_index; 1972 1973 dprintkdbg(DBG_0, 1974 "sg_update_list: Transfered %i of %i bytes, %i remain\n", 1975 xferred, srb->total_xfer_length, left); 1976 if (xferred == 0) { 1977 /* nothing to update since we did not transfer any data */ 1978 return; 1979 } 1980 1981 sg_verify_length(srb); 1982 srb->total_xfer_length = left; /* update remaining count */ 1983 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1984 if (xferred >= psge->length) { 1985 /* Complete SG entries done */ 1986 xferred -= psge->length; 1987 } else { 1988 /* Partial SG entry done */ 1989 psge->length -= xferred; 1990 psge->address += xferred; 1991 srb->sg_index = idx; 1992 pci_dma_sync_single_for_device(srb->dcb-> 1993 acb->dev, 1994 srb->sg_bus_addr, 1995 SEGMENTX_LEN, 1996 PCI_DMA_TODEVICE); 1997 break; 1998 } 1999 psge++; 2000 } 2001 sg_verify_length(srb); 2002} 2003 2004 2005/* 2006 * We have transfered a single byte (PIO mode?) and need to update 2007 * the count of bytes remaining (total_xfer_length) and update the sg 2008 * entry to either point to next byte in the current sg entry, or of 2009 * already at the end to point to the start of the next sg entry 2010 */ 2011static void sg_subtract_one(struct ScsiReqBlk *srb) 2012{ 2013 sg_update_list(srb, srb->total_xfer_length - 1); 2014} 2015 2016 2017/* 2018 * cleanup_after_transfer 2019 * 2020 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2021 * KG: Currently called from StatusPhase1 () 2022 * Should probably also be called from other places 2023 * Best might be to call it in DataXXPhase0, if new phase will differ 2024 */ 2025static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2026 struct ScsiReqBlk *srb) 2027{ 2028 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2029 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2030 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2031 clear_fifo(acb, "cleanup/in"); 2032 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2033 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2034 } else { /* write */ 2035 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2036 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2037 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2038 clear_fifo(acb, "cleanup/out"); 2039 } 2040 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2041} 2042 2043 2044/* 2045 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO 2046 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2047 */ 2048#define DC395x_LASTPIO 4 2049 2050 2051static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2052 u16 *pscsi_status) 2053{ 2054 struct DeviceCtlBlk *dcb = srb->dcb; 2055 u16 scsi_status = *pscsi_status; 2056 u32 d_left_counter = 0; 2057 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", 2058 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2059 2060 /* 2061 * KG: We need to drain the buffers before we draw any conclusions! 2062 * This means telling the DMA to push the rest into SCSI, telling 2063 * SCSI to push the rest to the bus. 2064 * However, the device might have been the one to stop us (phase 2065 * change), and the data in transit just needs to be accounted so 2066 * it can be retransmitted.) 2067 */ 2068 /* 2069 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2070 * If we need more data, the DMA SG list will be freshly set up, anyway 2071 */ 2072 dprintkdbg(DBG_PIO, "data_out_phase0: " 2073 "DMA{fifocnt=0x%02x fifostat=0x%02x} " 2074 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2075 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2076 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2077 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2078 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2079 srb->total_xfer_length); 2080 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2081 2082 if (!(srb->state & SRB_XFERPAD)) { 2083 if (scsi_status & PARITYERROR) 2084 srb->status |= PARITY_ERROR; 2085 2086 /* 2087 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2088 * is the no of bytes it got from the DMA engine not the no it 2089 * transferred successfully to the device. (And the difference could 2090 * be as much as the FIFO size, I guess ...) 2091 */ 2092 if (!(scsi_status & SCSIXFERDONE)) { 2093 /* 2094 * when data transfer from DMA FIFO to SCSI FIFO 2095 * if there was some data left in SCSI FIFO 2096 */ 2097 d_left_counter = 2098 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2099 0x1F); 2100 if (dcb->sync_period & WIDE_SYNC) 2101 d_left_counter <<= 1; 2102 2103 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2104 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2105 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2106 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2107 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2108 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2109 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2110 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2111 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2112 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2113 } 2114 /* 2115 * calculate all the residue data that not yet tranfered 2116 * SCSI transfer counter + left in SCSI FIFO data 2117 * 2118 * .....TRM_S1040_SCSI_COUNTER (24bits) 2119 * The counter always decrement by one for every SCSI byte transfer. 2120 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2121 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2122 */ 2123 if (srb->total_xfer_length > DC395x_LASTPIO) 2124 d_left_counter += 2125 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2126 2127 /* Is this a good idea? */ 2128 /*clear_fifo(acb, "DOP1"); */ 2129 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2130 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2131 && srb->cmd->request_bufflen % 2) { 2132 d_left_counter = 0; 2133 dprintkl(KERN_INFO, 2134 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2135 scsi_status); 2136 } 2137 /* 2138 * KG: Oops again. Same thinko as above: The SCSI might have been 2139 * faster than the DMA engine, so that it ran out of data. 2140 * In that case, we have to do just nothing! 2141 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2142 */ 2143 /* 2144 * KG: This is nonsense: We have been WRITING data to the bus 2145 * If the SCSI engine has no bytes left, how should the DMA engine? 2146 */ 2147 if (d_left_counter == 0) { 2148 srb->total_xfer_length = 0; 2149 } else { 2150 /* 2151 * if transfer not yet complete 2152 * there were some data residue in SCSI FIFO or 2153 * SCSI transfer counter not empty 2154 */ 2155 long oldxferred = 2156 srb->total_xfer_length - d_left_counter; 2157 const int diff = 2158 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2159 sg_update_list(srb, d_left_counter); 2160 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2161 if ((srb->segment_x[srb->sg_index].length == 2162 diff && srb->cmd->use_sg) 2163 || ((oldxferred & ~PAGE_MASK) == 2164 (PAGE_SIZE - diff)) 2165 ) { 2166 dprintkl(KERN_INFO, "data_out_phase0: " 2167 "Work around chip bug (%i)?\n", diff); 2168 d_left_counter = 2169 srb->total_xfer_length - diff; 2170 sg_update_list(srb, d_left_counter); 2171 /*srb->total_xfer_length -= diff; */ 2172 /*srb->virt_addr += diff; */ 2173 /*if (srb->cmd->use_sg) */ 2174 /* srb->sg_index++; */ 2175 } 2176 } 2177 } 2178 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2179 cleanup_after_transfer(acb, srb); 2180 } 2181} 2182 2183 2184static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2185 u16 *pscsi_status) 2186{ 2187 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", 2188 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2189 clear_fifo(acb, "data_out_phase1"); 2190 /* do prepare before transfer when data out phase */ 2191 data_io_transfer(acb, srb, XFERDATAOUT); 2192} 2193 2194static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2195 u16 *pscsi_status) 2196{ 2197 u16 scsi_status = *pscsi_status; 2198 2199 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", 2200 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2201 2202 /* 2203 * KG: DataIn is much more tricky than DataOut. When the device is finished 2204 * and switches to another phase, the SCSI engine should be finished too. 2205 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2206 * engine and transferred to memory. 2207 * We should wait for the FIFOs to be emptied by that (is there any way to 2208 * enforce this?) and then stop the DMA engine, because it might think, that 2209 * there are more bytes to follow. Yes, the device might disconnect prior to 2210 * having all bytes transferred! 2211 * Also we should make sure that all data from the DMA engine buffer's really 2212 * made its way to the system memory! Some documentation on this would not 2213 * seem to be a bad idea, actually. 2214 */ 2215 if (!(srb->state & SRB_XFERPAD)) { 2216 u32 d_left_counter; 2217 unsigned int sc, fc; 2218 2219 if (scsi_status & PARITYERROR) { 2220 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " 2221 "Parity Error\n", srb->cmd->pid); 2222 srb->status |= PARITY_ERROR; 2223 } 2224 /* 2225 * KG: We should wait for the DMA FIFO to be empty ... 2226 * but: it would be better to wait first for the SCSI FIFO and then the 2227 * the DMA FIFO to become empty? How do we know, that the device not already 2228 * sent data to the FIFO in a MsgIn phase, eg.? 2229 */ 2230 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2231#if 0 2232 int ctr = 6000000; 2233 dprintkl(KERN_DEBUG, 2234 "DIP0: Wait for DMA FIFO to flush ...\n"); 2235 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2236 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2237 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2238 while (! 2239 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2240 0x80) && --ctr); 2241 if (ctr < 6000000 - 1) 2242 dprintkl(KERN_DEBUG 2243 "DIP0: Had to wait for DMA ...\n"); 2244 if (!ctr) 2245 dprintkl(KERN_ERR, 2246 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2247 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2248#endif 2249 dprintkdbg(DBG_KG, "data_in_phase0: " 2250 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2251 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2252 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2253 } 2254 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2255 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2256 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2257 d_left_counter = sc + ((fc & 0x1f) 2258 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2259 0)); 2260 dprintkdbg(DBG_KG, "data_in_phase0: " 2261 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2262 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2263 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2264 fc, 2265 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2266 sc, 2267 fc, 2268 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2269 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2270 srb->total_xfer_length, d_left_counter); 2271#if DC395x_LASTPIO 2272 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ 2273 if (d_left_counter 2274 && srb->total_xfer_length <= DC395x_LASTPIO) { 2275 size_t left_io = srb->total_xfer_length; 2276 2277 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2278 /*sg_update_list (srb, d_left_counter); */ 2279 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " 2280 "for remaining %i bytes:", 2281 fc & 0x1f, 2282 (srb->dcb->sync_period & WIDE_SYNC) ? 2283 "words" : "bytes", 2284 srb->total_xfer_length); 2285 if (srb->dcb->sync_period & WIDE_SYNC) 2286 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2287 CFG2_WIDEFIFO); 2288 while (left_io) { 2289 unsigned char *virt, *base = NULL; 2290 unsigned long flags = 0; 2291 size_t len = left_io; 2292 2293 if (srb->cmd->use_sg) { 2294 size_t offset = srb->request_length - left_io; 2295 local_irq_save(flags); 2296 /* Assumption: it's inside one page as it's at most 4 bytes and 2297 I just assume it's on a 4-byte boundary */ 2298 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer, 2299 srb->sg_count, &offset, &len); 2300 virt = base + offset; 2301 } else { 2302 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io; 2303 len = left_io; 2304 } 2305 left_io -= len; 2306 2307 while (len) { 2308 u8 byte; 2309 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2310 *virt++ = byte; 2311 2312 if (debug_enabled(DBG_PIO)) 2313 printk(" %02x", byte); 2314 2315 d_left_counter--; 2316 sg_subtract_one(srb); 2317 2318 len--; 2319 2320 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2321 2322 if (fc == 0x40) { 2323 left_io = 0; 2324 break; 2325 } 2326 } 2327 2328 WARN_ON((fc != 0x40) == !d_left_counter); 2329 2330 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { 2331 /* Read the last byte ... */ 2332 if (srb->total_xfer_length > 0) { 2333 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2334 2335 *virt++ = byte; 2336 srb->total_xfer_length--; 2337 if (debug_enabled(DBG_PIO)) 2338 printk(" %02x", byte); 2339 } 2340 2341 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2342 } 2343 2344 if (srb->cmd->use_sg) { 2345 scsi_kunmap_atomic_sg(base); 2346 local_irq_restore(flags); 2347 } 2348 } 2349 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2350 /*srb->total_xfer_length = 0; */ 2351 if (debug_enabled(DBG_PIO)) 2352 printk("\n"); 2353 } 2354#endif /* DC395x_LASTPIO */ 2355 2356#if 0 2357 /* 2358 * KG: This was in DATAOUT. Does it also belong here? 2359 * Nobody seems to know what counter and fifo_cnt count exactly ... 2360 */ 2361 if (!(scsi_status & SCSIXFERDONE)) { 2362 /* 2363 * when data transfer from DMA FIFO to SCSI FIFO 2364 * if there was some data left in SCSI FIFO 2365 */ 2366 d_left_counter = 2367 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2368 0x1F); 2369 if (srb->dcb->sync_period & WIDE_SYNC) 2370 d_left_counter <<= 1; 2371 /* 2372 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2373 * so need to *= 2 2374 * KG: Seems to be correct ... 2375 */ 2376 } 2377#endif 2378 /* KG: This should not be needed any more! */ 2379 if (d_left_counter == 0 2380 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2381#if 0 2382 int ctr = 6000000; 2383 u8 TempDMAstatus; 2384 do { 2385 TempDMAstatus = 2386 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2387 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2388 if (!ctr) 2389 dprintkl(KERN_ERR, 2390 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2391 srb->total_xfer_length = 0; 2392#endif 2393 srb->total_xfer_length = d_left_counter; 2394 } else { /* phase changed */ 2395 /* 2396 * parsing the case: 2397 * when a transfer not yet complete 2398 * but be disconnected by target 2399 * if transfer not yet complete 2400 * there were some data residue in SCSI FIFO or 2401 * SCSI transfer counter not empty 2402 */ 2403 sg_update_list(srb, d_left_counter); 2404 } 2405 } 2406 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2407 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2408 cleanup_after_transfer(acb, srb); 2409 } 2410} 2411 2412 2413static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2414 u16 *pscsi_status) 2415{ 2416 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", 2417 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2418 data_io_transfer(acb, srb, XFERDATAIN); 2419} 2420 2421 2422static void data_io_transfer(struct AdapterCtlBlk *acb, 2423 struct ScsiReqBlk *srb, u16 io_dir) 2424{ 2425 struct DeviceCtlBlk *dcb = srb->dcb; 2426 u8 bval; 2427 dprintkdbg(DBG_0, 2428 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2429 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 2430 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2431 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2432 if (srb == acb->tmp_srb) 2433 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2434 if (srb->sg_index >= srb->sg_count) { 2435 /* can't happen? out of bounds error */ 2436 return; 2437 } 2438 2439 if (srb->total_xfer_length > DC395x_LASTPIO) { 2440 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2441 /* 2442 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2443 * Maybe, even ABORTXFER would be appropriate 2444 */ 2445 if (dma_status & XFERPENDING) { 2446 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2447 "Expect trouble!\n"); 2448 dump_register_info(acb, dcb, srb); 2449 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2450 } 2451 /* clear_fifo(acb, "IO"); */ 2452 /* 2453 * load what physical address of Scatter/Gather list table 2454 * want to be transfer 2455 */ 2456 srb->state |= SRB_DATA_XFER; 2457 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2458 if (srb->cmd->use_sg) { /* with S/G */ 2459 io_dir |= DMACMD_SG; 2460 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2461 srb->sg_bus_addr + 2462 sizeof(struct SGentry) * 2463 srb->sg_index); 2464 /* load how many bytes in the sg list table */ 2465 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2466 ((u32)(srb->sg_count - 2467 srb->sg_index) << 3)); 2468 } else { /* without S/G */ 2469 io_dir &= ~DMACMD_SG; 2470 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2471 srb->segment_x[0].address); 2472 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2473 srb->segment_x[0].length); 2474 } 2475 /* load total transfer length (24bits) max value 16Mbyte */ 2476 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2477 srb->total_xfer_length); 2478 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2479 if (io_dir & DMACMD_DIR) { /* read */ 2480 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2481 SCMD_DMA_IN); 2482 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2483 } else { 2484 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2485 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2486 SCMD_DMA_OUT); 2487 } 2488 2489 } 2490#if DC395x_LASTPIO 2491 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2492 /* 2493 * load what physical address of Scatter/Gather list table 2494 * want to be transfer 2495 */ 2496 srb->state |= SRB_DATA_XFER; 2497 /* load total transfer length (24bits) max value 16Mbyte */ 2498 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2499 srb->total_xfer_length); 2500 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2501 if (io_dir & DMACMD_DIR) { /* read */ 2502 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2503 SCMD_FIFO_IN); 2504 } else { /* write */ 2505 int ln = srb->total_xfer_length; 2506 size_t left_io = srb->total_xfer_length; 2507 2508 if (srb->dcb->sync_period & WIDE_SYNC) 2509 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2510 CFG2_WIDEFIFO); 2511 2512 while (left_io) { 2513 unsigned char *virt, *base = NULL; 2514 unsigned long flags = 0; 2515 size_t len = left_io; 2516 2517 if (srb->cmd->use_sg) { 2518 size_t offset = srb->request_length - left_io; 2519 local_irq_save(flags); 2520 /* Again, max 4 bytes */ 2521 base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer, 2522 srb->sg_count, &offset, &len); 2523 virt = base + offset; 2524 } else { 2525 virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io; 2526 len = left_io; 2527 } 2528 left_io -= len; 2529 2530 while (len--) { 2531 if (debug_enabled(DBG_PIO)) 2532 printk(" %02x", *virt); 2533 2534 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); 2535 2536 sg_subtract_one(srb); 2537 } 2538 2539 if (srb->cmd->use_sg) { 2540 scsi_kunmap_atomic_sg(base); 2541 local_irq_restore(flags); 2542 } 2543 } 2544 if (srb->dcb->sync_period & WIDE_SYNC) { 2545 if (ln % 2) { 2546 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2547 if (debug_enabled(DBG_PIO)) 2548 printk(" |00"); 2549 } 2550 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2551 } 2552 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2553 if (debug_enabled(DBG_PIO)) 2554 printk("\n"); 2555 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2556 SCMD_FIFO_OUT); 2557 } 2558 } 2559#endif /* DC395x_LASTPIO */ 2560 else { /* xfer pad */ 2561 u8 data = 0, data2 = 0; 2562 if (srb->sg_count) { 2563 srb->adapter_status = H_OVER_UNDER_RUN; 2564 srb->status |= OVER_RUN; 2565 } 2566 /* 2567 * KG: despite the fact that we are using 16 bits I/O ops 2568 * the SCSI FIFO is only 8 bits according to the docs 2569 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2570 */ 2571 if (dcb->sync_period & WIDE_SYNC) { 2572 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2573 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2574 CFG2_WIDEFIFO); 2575 if (io_dir & DMACMD_DIR) { 2576 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2577 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2578 } else { 2579 /* Danger, Robinson: If you find KGs 2580 * scattered over the wide disk, the driver 2581 * or chip is to blame :-( */ 2582 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2583 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2584 } 2585 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2586 } else { 2587 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2588 /* Danger, Robinson: If you find a collection of Ks on your disk 2589 * something broke :-( */ 2590 if (io_dir & DMACMD_DIR) 2591 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2592 else 2593 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2594 } 2595 srb->state |= SRB_XFERPAD; 2596 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2597 /* SCSI command */ 2598 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2599 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2600 } 2601} 2602 2603 2604static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2605 u16 *pscsi_status) 2606{ 2607 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", 2608 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2609 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2610 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2611 srb->state = SRB_COMPLETED; 2612 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2613 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2614 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2615} 2616 2617 2618static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2619 u16 *pscsi_status) 2620{ 2621 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", 2622 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2623 srb->state = SRB_STATUS; 2624 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2625 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2626} 2627 2628 2629/* Check if the message is complete */ 2630static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2631{ 2632 if (*msgbuf == EXTENDED_MESSAGE) { 2633 if (len < 2) 2634 return 0; 2635 if (len < msgbuf[1] + 2) 2636 return 0; 2637 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2638 if (len < 2) 2639 return 0; 2640 return 1; 2641} 2642 2643/* reject_msg */ 2644static inline void msgin_reject(struct AdapterCtlBlk *acb, 2645 struct ScsiReqBlk *srb) 2646{ 2647 srb->msgout_buf[0] = MESSAGE_REJECT; 2648 srb->msg_count = 1; 2649 DC395x_ENABLE_MSGOUT; 2650 srb->state &= ~SRB_MSGIN; 2651 srb->state |= SRB_MSGOUT; 2652 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2653 srb->msgin_buf[0], 2654 srb->dcb->target_id, srb->dcb->target_lun); 2655} 2656 2657 2658static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2659 struct DeviceCtlBlk *dcb, u8 tag) 2660{ 2661 struct ScsiReqBlk *srb = NULL; 2662 struct ScsiReqBlk *i; 2663 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", 2664 srb->cmd->pid, tag, srb); 2665 2666 if (!(dcb->tag_mask & (1 << tag))) 2667 dprintkl(KERN_DEBUG, 2668 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2669 dcb->tag_mask, tag); 2670 2671 if (list_empty(&dcb->srb_going_list)) 2672 goto mingx0; 2673 list_for_each_entry(i, &dcb->srb_going_list, list) { 2674 if (i->tag_number == tag) { 2675 srb = i; 2676 break; 2677 } 2678 } 2679 if (!srb) 2680 goto mingx0; 2681 2682 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", 2683 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun); 2684 if (dcb->flag & ABORT_DEV_) { 2685 /*srb->state = SRB_ABORT_SENT; */ 2686 enable_msgout_abort(acb, srb); 2687 } 2688 2689 if (!(srb->state & SRB_DISCONNECT)) 2690 goto mingx0; 2691 2692 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2693 srb->state |= dcb->active_srb->state; 2694 srb->state |= SRB_DATA_XFER; 2695 dcb->active_srb = srb; 2696 /* How can we make the DORS happy? */ 2697 return srb; 2698 2699 mingx0: 2700 srb = acb->tmp_srb; 2701 srb->state = SRB_UNEXPECT_RESEL; 2702 dcb->active_srb = srb; 2703 srb->msgout_buf[0] = MSG_ABORT_TAG; 2704 srb->msg_count = 1; 2705 DC395x_ENABLE_MSGOUT; 2706 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2707 return srb; 2708} 2709 2710 2711static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2712 struct DeviceCtlBlk *dcb) 2713{ 2714 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2715 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2716 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2717 set_xfer_rate(acb, dcb); 2718} 2719 2720 2721/* set async transfer mode */ 2722static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2723{ 2724 struct DeviceCtlBlk *dcb = srb->dcb; 2725 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2726 dcb->target_id, dcb->target_lun); 2727 2728 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2729 dcb->sync_mode |= SYNC_NEGO_DONE; 2730 /*dcb->sync_period &= 0; */ 2731 dcb->sync_offset = 0; 2732 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2733 srb->state &= ~SRB_DO_SYNC_NEGO; 2734 reprogram_regs(acb, dcb); 2735 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2736 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2737 build_wdtr(acb, dcb, srb); 2738 DC395x_ENABLE_MSGOUT; 2739 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2740 } 2741} 2742 2743 2744/* set sync transfer mode */ 2745static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2746{ 2747 struct DeviceCtlBlk *dcb = srb->dcb; 2748 u8 bval; 2749 int fact; 2750 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2751 "(%02i.%01i MHz) Offset %i\n", 2752 dcb->target_id, srb->msgin_buf[3] << 2, 2753 (250 / srb->msgin_buf[3]), 2754 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2755 srb->msgin_buf[4]); 2756 2757 if (srb->msgin_buf[4] > 15) 2758 srb->msgin_buf[4] = 15; 2759 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2760 dcb->sync_offset = 0; 2761 else if (dcb->sync_offset == 0) 2762 dcb->sync_offset = srb->msgin_buf[4]; 2763 if (srb->msgin_buf[4] > dcb->sync_offset) 2764 srb->msgin_buf[4] = dcb->sync_offset; 2765 else 2766 dcb->sync_offset = srb->msgin_buf[4]; 2767 bval = 0; 2768 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2769 || dcb->min_nego_period > 2770 clock_period[bval])) 2771 bval++; 2772 if (srb->msgin_buf[3] < clock_period[bval]) 2773 dprintkl(KERN_INFO, 2774 "msgin_set_sync: Increase sync nego period to %ins\n", 2775 clock_period[bval] << 2); 2776 srb->msgin_buf[3] = clock_period[bval]; 2777 dcb->sync_period &= 0xf0; 2778 dcb->sync_period |= ALT_SYNC | bval; 2779 dcb->min_nego_period = srb->msgin_buf[3]; 2780 2781 if (dcb->sync_period & WIDE_SYNC) 2782 fact = 500; 2783 else 2784 fact = 250; 2785 2786 dprintkl(KERN_INFO, 2787 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2788 dcb->target_id, (fact == 500) ? "Wide16" : "", 2789 dcb->min_nego_period << 2, dcb->sync_offset, 2790 (fact / dcb->min_nego_period), 2791 ((fact % dcb->min_nego_period) * 10 + 2792 dcb->min_nego_period / 2) / dcb->min_nego_period); 2793 2794 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2795 /* Reply with corrected SDTR Message */ 2796 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2797 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2798 2799 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2800 srb->msg_count = 5; 2801 DC395x_ENABLE_MSGOUT; 2802 dcb->sync_mode |= SYNC_NEGO_DONE; 2803 } else { 2804 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2805 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2806 build_wdtr(acb, dcb, srb); 2807 DC395x_ENABLE_MSGOUT; 2808 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2809 } 2810 } 2811 srb->state &= ~SRB_DO_SYNC_NEGO; 2812 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2813 2814 reprogram_regs(acb, dcb); 2815} 2816 2817 2818static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2819 struct ScsiReqBlk *srb) 2820{ 2821 struct DeviceCtlBlk *dcb = srb->dcb; 2822 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2823 2824 dcb->sync_period &= ~WIDE_SYNC; 2825 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2826 dcb->sync_mode |= WIDE_NEGO_DONE; 2827 srb->state &= ~SRB_DO_WIDE_NEGO; 2828 reprogram_regs(acb, dcb); 2829 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2830 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2831 build_sdtr(acb, dcb, srb); 2832 DC395x_ENABLE_MSGOUT; 2833 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2834 } 2835} 2836 2837static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2838{ 2839 struct DeviceCtlBlk *dcb = srb->dcb; 2840 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2841 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2842 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2843 2844 if (srb->msgin_buf[3] > wide) 2845 srb->msgin_buf[3] = wide; 2846 /* Completed */ 2847 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2848 dprintkl(KERN_DEBUG, 2849 "msgin_set_wide: Wide nego initiated <%02i>\n", 2850 dcb->target_id); 2851 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2852 srb->msg_count = 4; 2853 srb->state |= SRB_DO_WIDE_NEGO; 2854 DC395x_ENABLE_MSGOUT; 2855 } 2856 2857 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2858 if (srb->msgin_buf[3] > 0) 2859 dcb->sync_period |= WIDE_SYNC; 2860 else 2861 dcb->sync_period &= ~WIDE_SYNC; 2862 srb->state &= ~SRB_DO_WIDE_NEGO; 2863 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2864 dprintkdbg(DBG_1, 2865 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2866 (8 << srb->msgin_buf[3]), dcb->target_id); 2867 reprogram_regs(acb, dcb); 2868 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2869 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2870 build_sdtr(acb, dcb, srb); 2871 DC395x_ENABLE_MSGOUT; 2872 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2873 } 2874} 2875 2876 2877/* 2878 * extended message codes: 2879 * 2880 * code description 2881 * 2882 * 02h Reserved 2883 * 00h MODIFY DATA POINTER 2884 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2885 * 03h WIDE DATA TRANSFER REQUEST 2886 * 04h - 7Fh Reserved 2887 * 80h - FFh Vendor specific 2888 */ 2889static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2890 u16 *pscsi_status) 2891{ 2892 struct DeviceCtlBlk *dcb = acb->active_dcb; 2893 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid); 2894 2895 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2896 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2897 /* Now eval the msg */ 2898 switch (srb->msgin_buf[0]) { 2899 case DISCONNECT: 2900 srb->state = SRB_DISCONNECT; 2901 break; 2902 2903 case SIMPLE_QUEUE_TAG: 2904 case HEAD_OF_QUEUE_TAG: 2905 case ORDERED_QUEUE_TAG: 2906 srb = 2907 msgin_qtag(acb, dcb, 2908 srb->msgin_buf[1]); 2909 break; 2910 2911 case MESSAGE_REJECT: 2912 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2913 DO_CLRATN | DO_DATALATCH); 2914 /* A sync nego message was rejected ! */ 2915 if (srb->state & SRB_DO_SYNC_NEGO) { 2916 msgin_set_async(acb, srb); 2917 break; 2918 } 2919 /* A wide nego message was rejected ! */ 2920 if (srb->state & SRB_DO_WIDE_NEGO) { 2921 msgin_set_nowide(acb, srb); 2922 break; 2923 } 2924 enable_msgout_abort(acb, srb); 2925 /*srb->state |= SRB_ABORT_SENT */ 2926 break; 2927 2928 case EXTENDED_MESSAGE: 2929 /* SDTR */ 2930 if (srb->msgin_buf[1] == 3 2931 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2932 msgin_set_sync(acb, srb); 2933 break; 2934 } 2935 /* WDTR */ 2936 if (srb->msgin_buf[1] == 2 2937 && srb->msgin_buf[2] == EXTENDED_WDTR 2938 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2939 msgin_set_wide(acb, srb); 2940 break; 2941 } 2942 msgin_reject(acb, srb); 2943 break; 2944 2945 case MSG_IGNOREWIDE: 2946 /* Discard wide residual */ 2947 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2948 break; 2949 2950 case COMMAND_COMPLETE: 2951 /* nothing has to be done */ 2952 break; 2953 2954 case SAVE_POINTERS: 2955 /* 2956 * SAVE POINTER may be ignored as we have the struct 2957 * ScsiReqBlk* associated with the scsi command. 2958 */ 2959 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2960 "SAVE POINTER rem=%i Ignore\n", 2961 srb->cmd->pid, srb->total_xfer_length); 2962 break; 2963 2964 case RESTORE_POINTERS: 2965 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2966 break; 2967 2968 case ABORT: 2969 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2970 "<%02i-%i> ABORT msg\n", 2971 srb->cmd->pid, dcb->target_id, 2972 dcb->target_lun); 2973 dcb->flag |= ABORT_DEV_; 2974 enable_msgout_abort(acb, srb); 2975 break; 2976 2977 default: 2978 /* reject unknown messages */ 2979 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2980 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2981 srb->msg_count = 1; 2982 srb->msgout_buf[0] = dcb->identify_msg; 2983 DC395x_ENABLE_MSGOUT; 2984 srb->state |= SRB_MSGOUT; 2985 /*break; */ 2986 } 2987 msgin_reject(acb, srb); 2988 } 2989 2990 /* Clear counter and MsgIn state */ 2991 srb->state &= ~SRB_MSGIN; 2992 acb->msg_len = 0; 2993 } 2994 *pscsi_status = PH_BUS_FREE; 2995 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2996 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2997} 2998 2999 3000static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 3001 u16 *pscsi_status) 3002{ 3003 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid); 3004 clear_fifo(acb, "msgin_phase1"); 3005 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 3006 if (!(srb->state & SRB_MSGIN)) { 3007 srb->state &= ~SRB_DISCONNECT; 3008 srb->state |= SRB_MSGIN; 3009 } 3010 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3011 /* SCSI command */ 3012 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 3013} 3014 3015 3016static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 3017 u16 *pscsi_status) 3018{ 3019} 3020 3021 3022static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 3023 u16 *pscsi_status) 3024{ 3025} 3026 3027 3028static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3029{ 3030 struct DeviceCtlBlk *i; 3031 3032 /* set all lun device's period, offset */ 3033 if (dcb->identify_msg & 0x07) 3034 return; 3035 3036 if (acb->scan_devices) { 3037 current_sync_offset = dcb->sync_offset; 3038 return; 3039 } 3040 3041 list_for_each_entry(i, &acb->dcb_list, list) 3042 if (i->target_id == dcb->target_id) { 3043 i->sync_period = dcb->sync_period; 3044 i->sync_offset = dcb->sync_offset; 3045 i->sync_mode = dcb->sync_mode; 3046 i->min_nego_period = dcb->min_nego_period; 3047 } 3048} 3049 3050 3051static void disconnect(struct AdapterCtlBlk *acb) 3052{ 3053 struct DeviceCtlBlk *dcb = acb->active_dcb; 3054 struct ScsiReqBlk *srb; 3055 3056 if (!dcb) { 3057 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3058 udelay(500); 3059 /* Suspend queue for a while */ 3060 acb->scsi_host->last_reset = 3061 jiffies + HZ / 2 + 3062 HZ * acb->eeprom.delay_time; 3063 clear_fifo(acb, "disconnectEx"); 3064 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3065 return; 3066 } 3067 srb = dcb->active_srb; 3068 acb->active_dcb = NULL; 3069 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid); 3070 3071 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3072 clear_fifo(acb, "disconnect"); 3073 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3074 if (srb->state & SRB_UNEXPECT_RESEL) { 3075 dprintkl(KERN_ERR, 3076 "disconnect: Unexpected reselection <%02i-%i>\n", 3077 dcb->target_id, dcb->target_lun); 3078 srb->state = 0; 3079 waiting_process_next(acb); 3080 } else if (srb->state & SRB_ABORT_SENT) { 3081 dcb->flag &= ~ABORT_DEV_; 3082 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; 3083 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3084 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3085 waiting_process_next(acb); 3086 } else { 3087 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3088 || !(srb-> 3089 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3090 /* 3091 * Selection time out 3092 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3093 */ 3094 /* Unexp. Disc / Sel Timeout */ 3095 if (srb->state != SRB_START_ 3096 && srb->state != SRB_MSGOUT) { 3097 srb->state = SRB_READY; 3098 dprintkl(KERN_DEBUG, 3099 "disconnect: (pid#%li) Unexpected\n", 3100 srb->cmd->pid); 3101 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3102 goto disc1; 3103 } else { 3104 /* Normal selection timeout */ 3105 dprintkdbg(DBG_KG, "disconnect: (pid#%li) " 3106 "<%02i-%i> SelTO\n", srb->cmd->pid, 3107 dcb->target_id, dcb->target_lun); 3108 if (srb->retry_count++ > DC395x_MAX_RETRIES 3109 || acb->scan_devices) { 3110 srb->target_status = 3111 SCSI_STAT_SEL_TIMEOUT; 3112 goto disc1; 3113 } 3114 free_tag(dcb, srb); 3115 srb_going_to_waiting_move(dcb, srb); 3116 dprintkdbg(DBG_KG, 3117 "disconnect: (pid#%li) Retry\n", 3118 srb->cmd->pid); 3119 waiting_set_timer(acb, HZ / 20); 3120 } 3121 } else if (srb->state & SRB_DISCONNECT) { 3122 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3123 /* 3124 * SRB_DISCONNECT (This is what we expect!) 3125 */ 3126 if (bval & 0x40) { 3127 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3128 " 0x%02x: ACK set! Other controllers?\n", 3129 bval); 3130 /* It could come from another initiator, therefore don't do much ! */ 3131 } else 3132 waiting_process_next(acb); 3133 } else if (srb->state & SRB_COMPLETED) { 3134 disc1: 3135 /* 3136 ** SRB_COMPLETED 3137 */ 3138 free_tag(dcb, srb); 3139 dcb->active_srb = NULL; 3140 srb->state = SRB_FREE; 3141 srb_done(acb, dcb, srb); 3142 } 3143 } 3144} 3145 3146 3147static void reselect(struct AdapterCtlBlk *acb) 3148{ 3149 struct DeviceCtlBlk *dcb = acb->active_dcb; 3150 struct ScsiReqBlk *srb = NULL; 3151 u16 rsel_tar_lun_id; 3152 u8 id, lun; 3153 u8 arblostflag = 0; 3154 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3155 3156 clear_fifo(acb, "reselect"); 3157 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3158 /* Read Reselected Target ID and LUN */ 3159 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3160 if (dcb) { /* Arbitration lost but Reselection win */ 3161 srb = dcb->active_srb; 3162 if (!srb) { 3163 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3164 "but active_srb == NULL\n"); 3165 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3166 return; 3167 } 3168 /* Why the if ? */ 3169 if (!acb->scan_devices) { 3170 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " 3171 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3172 srb->cmd->pid, dcb->target_id, 3173 dcb->target_lun, rsel_tar_lun_id, 3174 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3175 arblostflag = 1; 3176 /*srb->state |= SRB_DISCONNECT; */ 3177 3178 srb->state = SRB_READY; 3179 free_tag(dcb, srb); 3180 srb_going_to_waiting_move(dcb, srb); 3181 waiting_set_timer(acb, HZ / 20); 3182 3183 /* return; */ 3184 } 3185 } 3186 /* Read Reselected Target Id and LUN */ 3187 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3188 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3189 "Got %i!\n", rsel_tar_lun_id); 3190 id = rsel_tar_lun_id & 0xff; 3191 lun = (rsel_tar_lun_id >> 8) & 7; 3192 dcb = find_dcb(acb, id, lun); 3193 if (!dcb) { 3194 dprintkl(KERN_ERR, "reselect: From non existent device " 3195 "<%02i-%i>\n", id, lun); 3196 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3197 return; 3198 } 3199 acb->active_dcb = dcb; 3200 3201 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3202 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3203 "disconnection? <%02i-%i>\n", 3204 dcb->target_id, dcb->target_lun); 3205 3206 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3207 srb = acb->tmp_srb; 3208 dcb->active_srb = srb; 3209 } else { 3210 /* There can be only one! */ 3211 srb = dcb->active_srb; 3212 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3213 /* 3214 * abort command 3215 */ 3216 dprintkl(KERN_DEBUG, 3217 "reselect: w/o disconnected cmds <%02i-%i>\n", 3218 dcb->target_id, dcb->target_lun); 3219 srb = acb->tmp_srb; 3220 srb->state = SRB_UNEXPECT_RESEL; 3221 dcb->active_srb = srb; 3222 enable_msgout_abort(acb, srb); 3223 } else { 3224 if (dcb->flag & ABORT_DEV_) { 3225 /*srb->state = SRB_ABORT_SENT; */ 3226 enable_msgout_abort(acb, srb); 3227 } else 3228 srb->state = SRB_DATA_XFER; 3229 3230 } 3231 } 3232 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3233 3234 /* Program HA ID, target ID, period and offset */ 3235 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3236 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3237 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3238 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3239 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3240 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3241 /* SCSI command */ 3242 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3243} 3244 3245 3246static inline u8 tagq_blacklist(char *name) 3247{ 3248#ifndef DC395x_NO_TAGQ 3249#if 0 3250 u8 i; 3251 for (i = 0; i < BADDEVCNT; i++) 3252 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3253 return 1; 3254#endif 3255 return 0; 3256#else 3257 return 1; 3258#endif 3259} 3260 3261 3262static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3263{ 3264 /* Check for SCSI format (ANSI and Response data format) */ 3265 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3266 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3267 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3268 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3269 /* ((dcb->dev_type == TYPE_DISK) 3270 || (dcb->dev_type == TYPE_MOD)) && */ 3271 !tagq_blacklist(((char *)ptr) + 8)) { 3272 if (dcb->max_command == 1) 3273 dcb->max_command = 3274 dcb->acb->tag_max_num; 3275 dcb->sync_mode |= EN_TAG_QUEUEING; 3276 /*dcb->tag_mask = 0; */ 3277 } else 3278 dcb->max_command = 1; 3279 } 3280} 3281 3282 3283static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3284 struct ScsiInqData *ptr) 3285{ 3286 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3287 dcb->dev_type = bval1; 3288 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3289 disc_tagq_set(dcb, ptr); 3290} 3291 3292 3293/* unmap mapped pci regions from SRB */ 3294static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3295{ 3296 struct scsi_cmnd *cmd = srb->cmd; 3297 enum dma_data_direction dir = cmd->sc_data_direction; 3298 if (cmd->use_sg && dir != PCI_DMA_NONE) { 3299 /* unmap DC395x SG list */ 3300 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3301 srb->sg_bus_addr, SEGMENTX_LEN); 3302 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3303 SEGMENTX_LEN, 3304 PCI_DMA_TODEVICE); 3305 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3306 cmd->use_sg, cmd->request_buffer); 3307 /* unmap the sg segments */ 3308 pci_unmap_sg(acb->dev, 3309 (struct scatterlist *)cmd->request_buffer, 3310 cmd->use_sg, dir); 3311 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { 3312 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", 3313 srb->segment_x[0].address, cmd->request_bufflen); 3314 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3315 cmd->request_bufflen, dir); 3316 } 3317} 3318 3319 3320/* unmap mapped pci sense buffer from SRB */ 3321static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3322 struct ScsiReqBlk *srb) 3323{ 3324 if (!(srb->flag & AUTO_REQSENSE)) 3325 return; 3326 /* Unmap sense buffer */ 3327 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3328 srb->segment_x[0].address); 3329 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3330 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3331 /* Restore SG stuff */ 3332 srb->total_xfer_length = srb->xferred; 3333 srb->segment_x[0].address = 3334 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3335 srb->segment_x[0].length = 3336 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3337} 3338 3339 3340/* 3341 * Complete execution of a SCSI command 3342 * Signal completion to the generic SCSI driver 3343 */ 3344static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3345 struct ScsiReqBlk *srb) 3346{ 3347 u8 tempcnt, status; 3348 struct scsi_cmnd *cmd = srb->cmd; 3349 enum dma_data_direction dir = cmd->sc_data_direction; 3350 int ckc_only = 1; 3351 3352 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, 3353 srb->cmd->device->id, srb->cmd->device->lun); 3354 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", 3355 srb, cmd->use_sg, srb->sg_index, srb->sg_count, 3356 cmd->request_buffer); 3357 status = srb->target_status; 3358 if (srb->flag & AUTO_REQSENSE) { 3359 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3360 pci_unmap_srb_sense(acb, srb); 3361 /* 3362 ** target status.......................... 3363 */ 3364 srb->flag &= ~AUTO_REQSENSE; 3365 srb->adapter_status = 0; 3366 srb->target_status = CHECK_CONDITION << 1; 3367 if (debug_enabled(DBG_1)) { 3368 switch (cmd->sense_buffer[2] & 0x0f) { 3369 case NOT_READY: 3370 dprintkl(KERN_DEBUG, 3371 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3372 cmd->cmnd[0], dcb->target_id, 3373 dcb->target_lun, status, acb->scan_devices); 3374 break; 3375 case UNIT_ATTENTION: 3376 dprintkl(KERN_DEBUG, 3377 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3378 cmd->cmnd[0], dcb->target_id, 3379 dcb->target_lun, status, acb->scan_devices); 3380 break; 3381 case ILLEGAL_REQUEST: 3382 dprintkl(KERN_DEBUG, 3383 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3384 cmd->cmnd[0], dcb->target_id, 3385 dcb->target_lun, status, acb->scan_devices); 3386 break; 3387 case MEDIUM_ERROR: 3388 dprintkl(KERN_DEBUG, 3389 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3390 cmd->cmnd[0], dcb->target_id, 3391 dcb->target_lun, status, acb->scan_devices); 3392 break; 3393 case HARDWARE_ERROR: 3394 dprintkl(KERN_DEBUG, 3395 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3396 cmd->cmnd[0], dcb->target_id, 3397 dcb->target_lun, status, acb->scan_devices); 3398 break; 3399 } 3400 if (cmd->sense_buffer[7] >= 6) 3401 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3402 "(0x%08x 0x%08x)\n", 3403 cmd->sense_buffer[2], cmd->sense_buffer[12], 3404 cmd->sense_buffer[13], 3405 *((unsigned int *)(cmd->sense_buffer + 3)), 3406 *((unsigned int *)(cmd->sense_buffer + 8))); 3407 else 3408 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3409 cmd->sense_buffer[2], 3410 *((unsigned int *)(cmd->sense_buffer + 3))); 3411 } 3412 3413 if (status == (CHECK_CONDITION << 1)) { 3414 cmd->result = DID_BAD_TARGET << 16; 3415 goto ckc_e; 3416 } 3417 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3418 3419 if (srb->total_xfer_length 3420 && srb->total_xfer_length >= cmd->underflow) 3421 cmd->result = 3422 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3423 srb->end_message, CHECK_CONDITION); 3424 /*SET_RES_DID(cmd->result,DID_OK) */ 3425 else 3426 cmd->result = 3427 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3428 srb->end_message, CHECK_CONDITION); 3429 3430 goto ckc_e; 3431 } 3432 3433/*************************************************************/ 3434 if (status) { 3435 /* 3436 * target status.......................... 3437 */ 3438 if (status_byte(status) == CHECK_CONDITION) { 3439 request_sense(acb, dcb, srb); 3440 return; 3441 } else if (status_byte(status) == QUEUE_FULL) { 3442 tempcnt = (u8)list_size(&dcb->srb_going_list); 3443 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3444 dcb->target_id, dcb->target_lun, tempcnt); 3445 if (tempcnt > 1) 3446 tempcnt--; 3447 dcb->max_command = tempcnt; 3448 free_tag(dcb, srb); 3449 srb_going_to_waiting_move(dcb, srb); 3450 waiting_set_timer(acb, HZ / 20); 3451 srb->adapter_status = 0; 3452 srb->target_status = 0; 3453 return; 3454 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3455 srb->adapter_status = H_SEL_TIMEOUT; 3456 srb->target_status = 0; 3457 cmd->result = DID_NO_CONNECT << 16; 3458 } else { 3459 srb->adapter_status = 0; 3460 SET_RES_DID(cmd->result, DID_ERROR); 3461 SET_RES_MSG(cmd->result, srb->end_message); 3462 SET_RES_TARGET(cmd->result, status); 3463 3464 } 3465 } else { 3466 /* 3467 ** process initiator status.......................... 3468 */ 3469 status = srb->adapter_status; 3470 if (status & H_OVER_UNDER_RUN) { 3471 srb->target_status = 0; 3472 SET_RES_DID(cmd->result, DID_OK); 3473 SET_RES_MSG(cmd->result, srb->end_message); 3474 } else if (srb->status & PARITY_ERROR) { 3475 SET_RES_DID(cmd->result, DID_PARITY); 3476 SET_RES_MSG(cmd->result, srb->end_message); 3477 } else { /* No error */ 3478 3479 srb->adapter_status = 0; 3480 srb->target_status = 0; 3481 SET_RES_DID(cmd->result, DID_OK); 3482 } 3483 } 3484 3485 if (dir != PCI_DMA_NONE) { 3486 if (cmd->use_sg) 3487 pci_dma_sync_sg_for_cpu(acb->dev, 3488 (struct scatterlist *)cmd-> 3489 request_buffer, cmd->use_sg, dir); 3490 else if (cmd->request_buffer) 3491 pci_dma_sync_single_for_cpu(acb->dev, 3492 srb->segment_x[0].address, 3493 cmd->request_bufflen, dir); 3494 } 3495 ckc_only = 0; 3496/* Check Error Conditions */ 3497 ckc_e: 3498 3499 if (cmd->cmnd[0] == INQUIRY) { 3500 unsigned char *base = NULL; 3501 struct ScsiInqData *ptr; 3502 unsigned long flags = 0; 3503 3504 if (cmd->use_sg) { 3505 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; 3506 size_t offset = 0, len = sizeof(struct ScsiInqData); 3507 3508 local_irq_save(flags); 3509 base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len); 3510 ptr = (struct ScsiInqData *)(base + offset); 3511 } else 3512 ptr = (struct ScsiInqData *)(cmd->request_buffer); 3513 3514 if (!ckc_only && (cmd->result & RES_DID) == 0 3515 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 3516 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3517 dcb->inquiry7 = ptr->Flags; 3518 3519 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3520 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3521 if ((cmd->result == (DID_OK << 16) 3522 || status_byte(cmd->result) & 3523 CHECK_CONDITION)) { 3524 if (!dcb->init_tcq_flag) { 3525 add_dev(acb, dcb, ptr); 3526 dcb->init_tcq_flag = 1; 3527 } 3528 } 3529 3530 if (cmd->use_sg) { 3531 scsi_kunmap_atomic_sg(base); 3532 local_irq_restore(flags); 3533 } 3534 } 3535 3536 /* Here is the info for Doug Gilbert's sg3 ... */ 3537 cmd->resid = srb->total_xfer_length; 3538 /* This may be interpreted by sb. or not ... */ 3539 cmd->SCp.this_residual = srb->total_xfer_length; 3540 cmd->SCp.buffers_residual = 0; 3541 if (debug_enabled(DBG_KG)) { 3542 if (srb->total_xfer_length) 3543 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " 3544 "cmnd=0x%02x Missed %i bytes\n", 3545 cmd->pid, cmd->device->id, cmd->device->lun, 3546 cmd->cmnd[0], srb->total_xfer_length); 3547 } 3548 3549 srb_going_remove(dcb, srb); 3550 /* Add to free list */ 3551 if (srb == acb->tmp_srb) 3552 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3553 else { 3554 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", 3555 cmd->pid, cmd->result); 3556 srb_free_insert(acb, srb); 3557 } 3558 pci_unmap_srb(acb, srb); 3559 3560 cmd->scsi_done(cmd); 3561 waiting_process_next(acb); 3562} 3563 3564 3565/* abort all cmds in our queues */ 3566static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3567 struct scsi_cmnd *cmd, u8 force) 3568{ 3569 struct DeviceCtlBlk *dcb; 3570 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3571 3572 list_for_each_entry(dcb, &acb->dcb_list, list) { 3573 struct ScsiReqBlk *srb; 3574 struct ScsiReqBlk *tmp; 3575 struct scsi_cmnd *p; 3576 3577 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3578 enum dma_data_direction dir; 3579 int result; 3580 3581 p = srb->cmd; 3582 dir = p->sc_data_direction; 3583 result = MK_RES(0, did_flag, 0, 0); 3584 printk("G:%li(%02i-%i) ", p->pid, 3585 p->device->id, p->device->lun); 3586 srb_going_remove(dcb, srb); 3587 free_tag(dcb, srb); 3588 srb_free_insert(acb, srb); 3589 p->result = result; 3590 pci_unmap_srb_sense(acb, srb); 3591 pci_unmap_srb(acb, srb); 3592 if (force) { 3593 /* For new EH, we normally don't need to give commands back, 3594 * as they all complete or all time out */ 3595 p->scsi_done(p); 3596 } 3597 } 3598 if (!list_empty(&dcb->srb_going_list)) 3599 dprintkl(KERN_DEBUG, 3600 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3601 dcb->target_id, dcb->target_lun); 3602 if (dcb->tag_mask) 3603 dprintkl(KERN_DEBUG, 3604 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3605 dcb->target_id, dcb->target_lun, 3606 dcb->tag_mask); 3607 3608 /* Waiting queue */ 3609 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3610 int result; 3611 p = srb->cmd; 3612 3613 result = MK_RES(0, did_flag, 0, 0); 3614 printk("W:%li<%02i-%i>", p->pid, p->device->id, 3615 p->device->lun); 3616 srb_waiting_remove(dcb, srb); 3617 srb_free_insert(acb, srb); 3618 p->result = result; 3619 pci_unmap_srb_sense(acb, srb); 3620 pci_unmap_srb(acb, srb); 3621 if (force) { 3622 /* For new EH, we normally don't need to give commands back, 3623 * as they all complete or all time out */ 3624 cmd->scsi_done(cmd); 3625 } 3626 } 3627 if (!list_empty(&dcb->srb_waiting_list)) 3628 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3629 list_size(&dcb->srb_waiting_list), dcb->target_id, 3630 dcb->target_lun); 3631 dcb->flag &= ~ABORT_DEV_; 3632 } 3633 printk("\n"); 3634} 3635 3636 3637static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3638{ 3639 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3640 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3642 3643 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3644 /* nothing */; 3645} 3646 3647 3648static void set_basic_config(struct AdapterCtlBlk *acb) 3649{ 3650 u8 bval; 3651 u16 wval; 3652 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3653 if (acb->config & HCC_PARITY) 3654 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3655 else 3656 bval = PHASELATCH | INITIATOR | BLOCKRST; 3657 3658 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3659 3660 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3661 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3662 /* program Host ID */ 3663 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3664 /* set ansynchronous transfer */ 3665 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3666 /* Turn LED control off */ 3667 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3668 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3669 /* DMA config */ 3670 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3671 wval |= 3672 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3673 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3674 /* Clear pending interrupt status */ 3675 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3676 /* Enable SCSI interrupt */ 3677 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3678 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3679 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3680 ); 3681} 3682 3683 3684static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3685{ 3686 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3687 /* delay half a second */ 3688 if (timer_pending(&acb->waiting_timer)) 3689 del_timer(&acb->waiting_timer); 3690 3691 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3692 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3693 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3694 udelay(500); 3695 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3696 acb->scsi_host->last_reset = 3697 jiffies + 5 * HZ / 2 + 3698 HZ * acb->eeprom.delay_time; 3699 3700 clear_fifo(acb, "scsi_reset_detect"); 3701 set_basic_config(acb); 3702 /*1.25 */ 3703 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3704 3705 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3706 acb->acb_flag |= RESET_DONE; 3707 } else { 3708 acb->acb_flag |= RESET_DETECT; 3709 reset_dev_param(acb); 3710 doing_srb_done(acb, DID_RESET, NULL, 1); 3711 /*DC395x_RecoverSRB( acb ); */ 3712 acb->active_dcb = NULL; 3713 acb->acb_flag = 0; 3714 waiting_process_next(acb); 3715 } 3716} 3717 3718 3719static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3720 struct ScsiReqBlk *srb) 3721{ 3722 struct scsi_cmnd *cmd = srb->cmd; 3723 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", 3724 cmd->pid, cmd->device->id, cmd->device->lun); 3725 3726 srb->flag |= AUTO_REQSENSE; 3727 srb->adapter_status = 0; 3728 srb->target_status = 0; 3729 3730 /* KG: Can this prevent crap sense data ? */ 3731 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 3732 3733 /* Save some data */ 3734 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3735 srb->segment_x[0].address; 3736 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3737 srb->segment_x[0].length; 3738 srb->xferred = srb->total_xfer_length; 3739 /* srb->segment_x : a one entry of S/G list table */ 3740 srb->total_xfer_length = sizeof(cmd->sense_buffer); 3741 srb->segment_x[0].length = sizeof(cmd->sense_buffer); 3742 /* Map sense buffer */ 3743 srb->segment_x[0].address = 3744 pci_map_single(acb->dev, cmd->sense_buffer, 3745 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE); 3746 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3747 cmd->sense_buffer, srb->segment_x[0].address, 3748 sizeof(cmd->sense_buffer)); 3749 srb->sg_count = 1; 3750 srb->sg_index = 0; 3751 3752 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3753 dprintkl(KERN_DEBUG, 3754 "request_sense: (pid#%li) failed <%02i-%i>\n", 3755 srb->cmd->pid, dcb->target_id, dcb->target_lun); 3756 srb_going_to_waiting_move(dcb, srb); 3757 waiting_set_timer(acb, HZ / 100); 3758 } 3759} 3760 3761 3762/** 3763 * device_alloc - Allocate a new device instance. This create the 3764 * devices instance and sets up all the data items. The adapter 3765 * instance is required to obtain confiuration information for this 3766 * device. This does *not* add this device to the adapters device 3767 * list. 3768 * 3769 * @acb: The adapter to obtain configuration information from. 3770 * @target: The target for the new device. 3771 * @lun: The lun for the new device. 3772 * 3773 * Return the new device if successful or NULL on failure. 3774 **/ 3775static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3776 u8 target, u8 lun) 3777{ 3778 struct NvRamType *eeprom = &acb->eeprom; 3779 u8 period_index = eeprom->target[target].period & 0x07; 3780 struct DeviceCtlBlk *dcb; 3781 3782 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3783 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3784 if (!dcb) 3785 return NULL; 3786 dcb->acb = NULL; 3787 INIT_LIST_HEAD(&dcb->srb_going_list); 3788 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3789 dcb->active_srb = NULL; 3790 dcb->tag_mask = 0; 3791 dcb->max_command = 1; 3792 dcb->target_id = target; 3793 dcb->target_lun = lun; 3794#ifndef DC395x_NO_DISCONNECT 3795 dcb->identify_msg = 3796 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3797#else 3798 dcb->identify_msg = IDENTIFY(0, lun); 3799#endif 3800 dcb->dev_mode = eeprom->target[target].cfg0; 3801 dcb->inquiry7 = 0; 3802 dcb->sync_mode = 0; 3803 dcb->min_nego_period = clock_period[period_index]; 3804 dcb->sync_period = 0; 3805 dcb->sync_offset = 0; 3806 dcb->flag = 0; 3807 3808#ifndef DC395x_NO_WIDE 3809 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3810 && (acb->config & HCC_WIDE_CARD)) 3811 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3812#endif 3813#ifndef DC395x_NO_SYNC 3814 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3815 if (!(lun) || current_sync_offset) 3816 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3817#endif 3818 if (dcb->target_lun != 0) { 3819 /* Copy settings */ 3820 struct DeviceCtlBlk *p; 3821 list_for_each_entry(p, &acb->dcb_list, list) 3822 if (p->target_id == dcb->target_id) 3823 break; 3824 dprintkdbg(DBG_1, 3825 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3826 dcb->target_id, dcb->target_lun, 3827 p->target_id, p->target_lun); 3828 dcb->sync_mode = p->sync_mode; 3829 dcb->sync_period = p->sync_period; 3830 dcb->min_nego_period = p->min_nego_period; 3831 dcb->sync_offset = p->sync_offset; 3832 dcb->inquiry7 = p->inquiry7; 3833 } 3834 return dcb; 3835} 3836 3837 3838/** 3839 * adapter_add_device - Adds the device instance to the adaptor instance. 3840 * 3841 * @acb: The adapter device to be updated 3842 * @dcb: A newly created and intialised device instance to add. 3843 **/ 3844static void adapter_add_device(struct AdapterCtlBlk *acb, 3845 struct DeviceCtlBlk *dcb) 3846{ 3847 /* backpointer to adapter */ 3848 dcb->acb = acb; 3849 3850 /* set run_robin to this device if it is currently empty */ 3851 if (list_empty(&acb->dcb_list)) 3852 acb->dcb_run_robin = dcb; 3853 3854 /* add device to list */ 3855 list_add_tail(&dcb->list, &acb->dcb_list); 3856 3857 /* update device maps */ 3858 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3859 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3860} 3861 3862 3863/** 3864 * adapter_remove_device - Removes the device instance from the adaptor 3865 * instance. The device instance is not check in any way or freed by this. 3866 * The caller is expected to take care of that. This will simply remove the 3867 * device from the adapters data strcutures. 3868 * 3869 * @acb: The adapter device to be updated 3870 * @dcb: A device that has previously been added to the adapter. 3871 **/ 3872static void adapter_remove_device(struct AdapterCtlBlk *acb, 3873 struct DeviceCtlBlk *dcb) 3874{ 3875 struct DeviceCtlBlk *i; 3876 struct DeviceCtlBlk *tmp; 3877 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3878 dcb->target_id, dcb->target_lun); 3879 3880 /* fix up any pointers to this device that we have in the adapter */ 3881 if (acb->active_dcb == dcb) 3882 acb->active_dcb = NULL; 3883 if (acb->dcb_run_robin == dcb) 3884 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3885 3886 /* unlink from list */ 3887 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3888 if (dcb == i) { 3889 list_del(&i->list); 3890 break; 3891 } 3892 3893 /* clear map and children */ 3894 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3895 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3896 dcb->acb = NULL; 3897} 3898 3899 3900/** 3901 * adapter_remove_and_free_device - Removes a single device from the adapter 3902 * and then frees the device information. 3903 * 3904 * @acb: The adapter device to be updated 3905 * @dcb: A device that has previously been added to the adapter. 3906 */ 3907static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3908 struct DeviceCtlBlk *dcb) 3909{ 3910 if (list_size(&dcb->srb_going_list) > 1) { 3911 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3912 "Won't remove because of %i active requests.\n", 3913 dcb->target_id, dcb->target_lun, 3914 list_size(&dcb->srb_going_list)); 3915 return; 3916 } 3917 adapter_remove_device(acb, dcb); 3918 kfree(dcb); 3919} 3920 3921 3922/** 3923 * adapter_remove_and_free_all_devices - Removes and frees all of the 3924 * devices associated with the specified adapter. 3925 * 3926 * @acb: The adapter from which all devices should be removed. 3927 **/ 3928static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3929{ 3930 struct DeviceCtlBlk *dcb; 3931 struct DeviceCtlBlk *tmp; 3932 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3933 list_size(&acb->dcb_list)); 3934 3935 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3936 adapter_remove_and_free_device(acb, dcb); 3937} 3938 3939 3940/** 3941 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3942 * scsi device that we need to deal with. We allocate a new device and then 3943 * insert that device into the adapters device list. 3944 * 3945 * @scsi_device: The new scsi device that we need to handle. 3946 **/ 3947static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3948{ 3949 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3950 struct DeviceCtlBlk *dcb; 3951 3952 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3953 if (!dcb) 3954 return -ENOMEM; 3955 adapter_add_device(acb, dcb); 3956 3957 return 0; 3958} 3959 3960 3961/** 3962 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3963 * device that is going away. 3964 * 3965 * @scsi_device: The new scsi device that we need to handle. 3966 **/ 3967static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3968{ 3969 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3970 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3971 if (dcb) 3972 adapter_remove_and_free_device(acb, dcb); 3973} 3974 3975 3976 3977 3978/** 3979 * trms1040_wait_30us: wait for 30 us 3980 * 3981 * Waits for 30us (using the chip by the looks of it..) 3982 * 3983 * @io_port: base I/O address 3984 **/ 3985static void __devinit trms1040_wait_30us(unsigned long io_port) 3986{ 3987 /* ScsiPortStallExecution(30); wait 30 us */ 3988 outb(5, io_port + TRM_S1040_GEN_TIMER); 3989 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3990 /* nothing */ ; 3991} 3992 3993 3994/** 3995 * trms1040_write_cmd - write the secified command and address to 3996 * chip 3997 * 3998 * @io_port: base I/O address 3999 * @cmd: SB + op code (command) to send 4000 * @addr: address to send 4001 **/ 4002static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 4003{ 4004 int i; 4005 u8 send_data; 4006 4007 /* program SB + OP code */ 4008 for (i = 0; i < 3; i++, cmd <<= 1) { 4009 send_data = NVR_SELECT; 4010 if (cmd & 0x04) /* Start from bit 2 */ 4011 send_data |= NVR_BITOUT; 4012 4013 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4014 trms1040_wait_30us(io_port); 4015 outb((send_data | NVR_CLOCK), 4016 io_port + TRM_S1040_GEN_NVRAM); 4017 trms1040_wait_30us(io_port); 4018 } 4019 4020 /* send address */ 4021 for (i = 0; i < 7; i++, addr <<= 1) { 4022 send_data = NVR_SELECT; 4023 if (addr & 0x40) /* Start from bit 6 */ 4024 send_data |= NVR_BITOUT; 4025 4026 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4027 trms1040_wait_30us(io_port); 4028 outb((send_data | NVR_CLOCK), 4029 io_port + TRM_S1040_GEN_NVRAM); 4030 trms1040_wait_30us(io_port); 4031 } 4032 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4033 trms1040_wait_30us(io_port); 4034} 4035 4036 4037/** 4038 * trms1040_set_data - store a single byte in the eeprom 4039 * 4040 * Called from write all to write a single byte into the SSEEPROM 4041 * Which is done one bit at a time. 4042 * 4043 * @io_port: base I/O address 4044 * @addr: offset into EEPROM 4045 * @byte: bytes to write 4046 **/ 4047static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4048{ 4049 int i; 4050 u8 send_data; 4051 4052 /* Send write command & address */ 4053 trms1040_write_cmd(io_port, 0x05, addr); 4054 4055 /* Write data */ 4056 for (i = 0; i < 8; i++, byte <<= 1) { 4057 send_data = NVR_SELECT; 4058 if (byte & 0x80) /* Start from bit 7 */ 4059 send_data |= NVR_BITOUT; 4060 4061 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4062 trms1040_wait_30us(io_port); 4063 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4064 trms1040_wait_30us(io_port); 4065 } 4066 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4067 trms1040_wait_30us(io_port); 4068 4069 /* Disable chip select */ 4070 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4071 trms1040_wait_30us(io_port); 4072 4073 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4074 trms1040_wait_30us(io_port); 4075 4076 /* Wait for write ready */ 4077 while (1) { 4078 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4079 trms1040_wait_30us(io_port); 4080 4081 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4082 trms1040_wait_30us(io_port); 4083 4084 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4085 break; 4086 } 4087 4088 /* Disable chip select */ 4089 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4090} 4091 4092 4093/** 4094 * trms1040_write_all - write 128 bytes to the eeprom 4095 * 4096 * Write the supplied 128 bytes to the chips SEEPROM 4097 * 4098 * @eeprom: the data to write 4099 * @io_port: the base io port 4100 **/ 4101static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4102{ 4103 u8 *b_eeprom = (u8 *)eeprom; 4104 u8 addr; 4105 4106 /* Enable SEEPROM */ 4107 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4108 io_port + TRM_S1040_GEN_CONTROL); 4109 4110 /* write enable */ 4111 trms1040_write_cmd(io_port, 0x04, 0xFF); 4112 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4113 trms1040_wait_30us(io_port); 4114 4115 /* write */ 4116 for (addr = 0; addr < 128; addr++, b_eeprom++) 4117 trms1040_set_data(io_port, addr, *b_eeprom); 4118 4119 /* write disable */ 4120 trms1040_write_cmd(io_port, 0x04, 0x00); 4121 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4122 trms1040_wait_30us(io_port); 4123 4124 /* Disable SEEPROM */ 4125 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4126 io_port + TRM_S1040_GEN_CONTROL); 4127} 4128 4129 4130/** 4131 * trms1040_get_data - get a single byte from the eeprom 4132 * 4133 * Called from read all to read a single byte into the SSEEPROM 4134 * Which is done one bit at a time. 4135 * 4136 * @io_port: base I/O address 4137 * @addr: offset into SEEPROM 4138 * 4139 * Returns the byte read. 4140 **/ 4141static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) 4142{ 4143 int i; 4144 u8 read_byte; 4145 u8 result = 0; 4146 4147 /* Send read command & address */ 4148 trms1040_write_cmd(io_port, 0x06, addr); 4149 4150 /* read data */ 4151 for (i = 0; i < 8; i++) { 4152 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4153 trms1040_wait_30us(io_port); 4154 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4155 4156 /* Get data bit while falling edge */ 4157 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4158 result <<= 1; 4159 if (read_byte & NVR_BITIN) 4160 result |= 1; 4161 4162 trms1040_wait_30us(io_port); 4163 } 4164 4165 /* Disable chip select */ 4166 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4167 return result; 4168} 4169 4170 4171/** 4172 * trms1040_read_all - read all bytes from the eeprom 4173 * 4174 * Read the 128 bytes from the SEEPROM. 4175 * 4176 * @eeprom: where to store the data 4177 * @io_port: the base io port 4178 **/ 4179static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4180{ 4181 u8 *b_eeprom = (u8 *)eeprom; 4182 u8 addr; 4183 4184 /* Enable SEEPROM */ 4185 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4186 io_port + TRM_S1040_GEN_CONTROL); 4187 4188 /* read details */ 4189 for (addr = 0; addr < 128; addr++, b_eeprom++) 4190 *b_eeprom = trms1040_get_data(io_port, addr); 4191 4192 /* Disable SEEPROM */ 4193 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4194 io_port + TRM_S1040_GEN_CONTROL); 4195} 4196 4197 4198 4199/** 4200 * check_eeprom - get and check contents of the eeprom 4201 * 4202 * Read seeprom 128 bytes into the memory provider in eeprom. 4203 * Checks the checksum and if it's not correct it uses a set of default 4204 * values. 4205 * 4206 * @eeprom: caller allocated strcuture to read the eeprom data into 4207 * @io_port: io port to read from 4208 **/ 4209static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4210{ 4211 u16 *w_eeprom = (u16 *)eeprom; 4212 u16 w_addr; 4213 u16 cksum; 4214 u32 d_addr; 4215 u32 *d_eeprom; 4216 4217 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4218 4219 cksum = 0; 4220 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4221 w_addr++, w_eeprom++) 4222 cksum += *w_eeprom; 4223 if (cksum != 0x1234) { 4224 /* 4225 * Checksum is wrong. 4226 * Load a set of defaults into the eeprom buffer 4227 */ 4228 dprintkl(KERN_WARNING, 4229 "EEProm checksum error: using default values and options.\n"); 4230 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4231 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4232 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4233 eeprom->sub_sys_id[1] = 4234 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4235 eeprom->sub_class = 0x00; 4236 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4237 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4238 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4239 eeprom->device_id[1] = 4240 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4241 eeprom->reserved = 0x00; 4242 4243 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4244 d_addr < 16; d_addr++, d_eeprom++) 4245 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4246 4247 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4248 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4249 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4250 *d_eeprom = 0x00; 4251 4252 /* Now load defaults (maybe set by boot/module params) */ 4253 set_safe_settings(); 4254 fix_settings(); 4255 eeprom_override(eeprom); 4256 4257 eeprom->cksum = 0x00; 4258 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4259 w_addr < 63; w_addr++, w_eeprom++) 4260 cksum += *w_eeprom; 4261 4262 *w_eeprom = 0x1234 - cksum; 4263 trms1040_write_all(eeprom, io_port); 4264 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4265 } else { 4266 set_safe_settings(); 4267 eeprom_index_to_delay(eeprom); 4268 eeprom_override(eeprom); 4269 } 4270} 4271 4272 4273/** 4274 * print_eeprom_settings - output the eeprom settings 4275 * to the kernel log so people can see what they were. 4276 * 4277 * @eeprom: The eeprom data strucutre to show details for. 4278 **/ 4279static void __devinit print_eeprom_settings(struct NvRamType *eeprom) 4280{ 4281 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4282 eeprom->scsi_id, 4283 eeprom->target[0].period, 4284 clock_speed[eeprom->target[0].period] / 10, 4285 clock_speed[eeprom->target[0].period] % 10, 4286 eeprom->target[0].cfg0); 4287 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4288 eeprom->channel_cfg, eeprom->max_tag, 4289 1 << eeprom->max_tag, eeprom->delay_time); 4290} 4291 4292 4293/* Free SG tables */ 4294static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4295{ 4296 int i; 4297 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4298 4299 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4300 kfree(acb->srb_array[i].segment_x); 4301} 4302 4303 4304/* 4305 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4306 * should never cross a page boundary */ 4307static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4308{ 4309 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4310 *SEGMENTX_LEN; 4311 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4312 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4313 int srb_idx = 0; 4314 unsigned i = 0; 4315 struct SGentry *ptr; 4316 4317 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4318 acb->srb_array[i].segment_x = NULL; 4319 4320 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4321 while (pages--) { 4322 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); 4323 if (!ptr) { 4324 adapter_sg_tables_free(acb); 4325 return 1; 4326 } 4327 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4328 PAGE_SIZE, ptr, srb_idx); 4329 i = 0; 4330 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4331 acb->srb_array[srb_idx++].segment_x = 4332 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4333 } 4334 if (i < srbs_per_page) 4335 acb->srb.segment_x = 4336 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4337 else 4338 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4339 return 0; 4340} 4341 4342 4343 4344/** 4345 * adapter_print_config - print adapter connection and termination 4346 * config 4347 * 4348 * The io port in the adapter needs to have been set before calling 4349 * this function. 4350 * 4351 * @acb: The adapter to print the information for. 4352 **/ 4353static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) 4354{ 4355 u8 bval; 4356 4357 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4358 dprintkl(KERN_INFO, "%sConnectors: ", 4359 ((bval & WIDESCSI) ? "(Wide) " : "")); 4360 if (!(bval & CON5068)) 4361 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4362 if (!(bval & CON68)) 4363 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4364 if (!(bval & CON50)) 4365 printk("int50 "); 4366 if ((bval & (CON5068 | CON50 | CON68)) == 4367 0 /*(CON5068 | CON50 | CON68) */ ) 4368 printk(" Oops! (All 3?) "); 4369 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4370 printk(" Termination: "); 4371 if (bval & DIS_TERM) 4372 printk("Disabled\n"); 4373 else { 4374 if (bval & AUTOTERM) 4375 printk("Auto "); 4376 if (bval & LOW8TERM) 4377 printk("Low "); 4378 if (bval & UP8TERM) 4379 printk("High "); 4380 printk("\n"); 4381 } 4382} 4383 4384 4385/** 4386 * adapter_init_params - Initialize the various parameters in the 4387 * adapter structure. Note that the pointer to the scsi_host is set 4388 * early (when this instance is created) and the io_port and irq 4389 * values are set later after they have been reserved. This just gets 4390 * everything set to a good starting position. 4391 * 4392 * The eeprom structure in the adapter needs to have been set before 4393 * calling this function. 4394 * 4395 * @acb: The adapter to initialize. 4396 **/ 4397static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) 4398{ 4399 struct NvRamType *eeprom = &acb->eeprom; 4400 int i; 4401 4402 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4403 /* NOTE: acb->io_port_base is set at port registration time */ 4404 /* NOTE: acb->io_port_len is set at port registration time */ 4405 4406 INIT_LIST_HEAD(&acb->dcb_list); 4407 acb->dcb_run_robin = NULL; 4408 acb->active_dcb = NULL; 4409 4410 INIT_LIST_HEAD(&acb->srb_free_list); 4411 /* temp SRB for Q tag used or abort command used */ 4412 acb->tmp_srb = &acb->srb; 4413 init_timer(&acb->waiting_timer); 4414 init_timer(&acb->selto_timer); 4415 4416 acb->srb_count = DC395x_MAX_SRB_CNT; 4417 4418 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4419 /* NOTE: acb->irq_level is set at IRQ registration time */ 4420 4421 acb->tag_max_num = 1 << eeprom->max_tag; 4422 if (acb->tag_max_num > 30) 4423 acb->tag_max_num = 30; 4424 4425 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4426 acb->gmode2 = eeprom->channel_cfg; 4427 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4428 4429 if (eeprom->channel_cfg & NAC_SCANLUN) 4430 acb->lun_chk = 1; 4431 acb->scan_devices = 1; 4432 4433 acb->scsi_host->this_id = eeprom->scsi_id; 4434 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4435 4436 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4437 acb->dcb_map[i] = 0; 4438 4439 acb->msg_len = 0; 4440 4441 /* link static array of srbs into the srb free list */ 4442 for (i = 0; i < acb->srb_count - 1; i++) 4443 srb_free_insert(acb, &acb->srb_array[i]); 4444} 4445 4446 4447/** 4448 * adapter_init_host - Initialize the scsi host instance based on 4449 * values that we have already stored in the adapter instance. There's 4450 * some mention that a lot of these are deprecated, so we won't use 4451 * them (we'll use the ones in the adapter instance) but we'll fill 4452 * them in in case something else needs them. 4453 * 4454 * The eeprom structure, irq and io ports in the adapter need to have 4455 * been set before calling this function. 4456 * 4457 * @host: The scsi host instance to fill in the values for. 4458 **/ 4459static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) 4460{ 4461 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4462 struct NvRamType *eeprom = &acb->eeprom; 4463 4464 host->max_cmd_len = 24; 4465 host->can_queue = DC395x_MAX_CMD_QUEUE; 4466 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4467 host->this_id = (int)eeprom->scsi_id; 4468 host->io_port = acb->io_port_base; 4469 host->n_io_port = acb->io_port_len; 4470 host->dma_channel = -1; 4471 host->unique_id = acb->io_port_base; 4472 host->irq = acb->irq_level; 4473 host->last_reset = jiffies; 4474 4475 host->max_id = 16; 4476 if (host->max_id - 1 == eeprom->scsi_id) 4477 host->max_id--; 4478 4479#ifdef CONFIG_SCSI_MULTI_LUN 4480 if (eeprom->channel_cfg & NAC_SCANLUN) 4481 host->max_lun = 8; 4482 else 4483 host->max_lun = 1; 4484#else 4485 host->max_lun = 1; 4486#endif 4487 4488} 4489 4490 4491/** 4492 * adapter_init_chip - Get the chip into a know state and figure out 4493 * some of the settings that apply to this adapter. 4494 * 4495 * The io port in the adapter needs to have been set before calling 4496 * this function. The config will be configured correctly on return. 4497 * 4498 * @acb: The adapter which we are to init. 4499 **/ 4500static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) 4501{ 4502 struct NvRamType *eeprom = &acb->eeprom; 4503 4504 /* Mask all the interrupt */ 4505 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4506 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4507 4508 /* Reset SCSI module */ 4509 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4510 4511 /* Reset PCI/DMA module */ 4512 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4513 udelay(20); 4514 4515 /* program configuration 0 */ 4516 acb->config = HCC_AUTOTERM | HCC_PARITY; 4517 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4518 acb->config |= HCC_WIDE_CARD; 4519 4520 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4521 acb->config |= HCC_SCSI_RESET; 4522 4523 if (acb->config & HCC_SCSI_RESET) { 4524 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4525 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4526 4527 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4528 /*spin_unlock_irq (&io_request_lock); */ 4529 udelay(500); 4530 4531 acb->scsi_host->last_reset = 4532 jiffies + HZ / 2 + 4533 HZ * acb->eeprom.delay_time; 4534 4535 /*spin_lock_irq (&io_request_lock); */ 4536 } 4537} 4538 4539 4540/** 4541 * init_adapter - Grab the resource for the card, setup the adapter 4542 * information, set the card into a known state, create the various 4543 * tables etc etc. This basically gets all adapter information all up 4544 * to date, intialised and gets the chip in sync with it. 4545 * 4546 * @host: This hosts adapter structure 4547 * @io_port: The base I/O port 4548 * @irq: IRQ 4549 * 4550 * Returns 0 if the initialization succeeds, any other value on 4551 * failure. 4552 **/ 4553static int __devinit adapter_init(struct AdapterCtlBlk *acb, 4554 unsigned long io_port, u32 io_port_len, unsigned int irq) 4555{ 4556 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4557 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4558 goto failed; 4559 } 4560 /* store port base to indicate we have registered it */ 4561 acb->io_port_base = io_port; 4562 acb->io_port_len = io_port_len; 4563 4564 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { 4565 /* release the region we just claimed */ 4566 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4567 goto failed; 4568 } 4569 /* store irq to indicate we have registered it */ 4570 acb->irq_level = irq; 4571 4572 /* get eeprom configuration information and command line settings etc */ 4573 check_eeprom(&acb->eeprom, io_port); 4574 print_eeprom_settings(&acb->eeprom); 4575 4576 /* setup adapter control block */ 4577 adapter_init_params(acb); 4578 4579 /* display card connectors/termination settings */ 4580 adapter_print_config(acb); 4581 4582 if (adapter_sg_tables_alloc(acb)) { 4583 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4584 goto failed; 4585 } 4586 adapter_init_scsi_host(acb->scsi_host); 4587 adapter_init_chip(acb); 4588 set_basic_config(acb); 4589 4590 dprintkdbg(DBG_0, 4591 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4592 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4593 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4594 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4595 return 0; 4596 4597failed: 4598 if (acb->irq_level) 4599 free_irq(acb->irq_level, acb); 4600 if (acb->io_port_base) 4601 release_region(acb->io_port_base, acb->io_port_len); 4602 adapter_sg_tables_free(acb); 4603 4604 return 1; 4605} 4606 4607 4608/** 4609 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4610 * stopping all operations and disabling interrupt generation on the 4611 * card. 4612 * 4613 * @acb: The adapter which we are to shutdown. 4614 **/ 4615static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4616{ 4617 /* disable interrupts */ 4618 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4619 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4620 4621 /* reset the scsi bus */ 4622 if (acb->config & HCC_SCSI_RESET) 4623 reset_scsi_bus(acb); 4624 4625 /* clear any pending interupt state */ 4626 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4627} 4628 4629 4630 4631/** 4632 * adapter_uninit - Shut down the chip and release any resources that 4633 * we had allocated. Once this returns the adapter should not be used 4634 * anymore. 4635 * 4636 * @acb: The adapter which we are to un-initialize. 4637 **/ 4638static void adapter_uninit(struct AdapterCtlBlk *acb) 4639{ 4640 unsigned long flags; 4641 DC395x_LOCK_IO(acb->scsi_host, flags); 4642 4643 /* remove timers */ 4644 if (timer_pending(&acb->waiting_timer)) 4645 del_timer(&acb->waiting_timer); 4646 if (timer_pending(&acb->selto_timer)) 4647 del_timer(&acb->selto_timer); 4648 4649 adapter_uninit_chip(acb); 4650 adapter_remove_and_free_all_devices(acb); 4651 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4652 4653 if (acb->irq_level) 4654 free_irq(acb->irq_level, acb); 4655 if (acb->io_port_base) 4656 release_region(acb->io_port_base, acb->io_port_len); 4657 4658 adapter_sg_tables_free(acb); 4659} 4660 4661 4662#undef SPRINTF 4663#define SPRINTF(args...) pos += sprintf(pos, args) 4664 4665#undef YESNO 4666#define YESNO(YN) \ 4667 if (YN) SPRINTF(" Yes ");\ 4668 else SPRINTF(" No ") 4669 4670static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, 4671 char **start, off_t offset, int length, int inout) 4672{ 4673 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4674 int spd, spd1; 4675 char *pos = buffer; 4676 struct DeviceCtlBlk *dcb; 4677 unsigned long flags; 4678 int dev; 4679 4680 if (inout) /* Has data been written to the file ? */ 4681 return -EPERM; 4682 4683 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4684 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4685 4686 DC395x_LOCK_IO(acb->scsi_host, flags); 4687 4688 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4689 SPRINTF("DC395U/UW/F DC315/U %s\n", 4690 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4691 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4692 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4693 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4694 4695 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); 4696 SPRINTF("AdapterID %i\n", host->this_id); 4697 4698 SPRINTF("tag_max_num %i", acb->tag_max_num); 4699 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4700 SPRINTF(", FilterCfg 0x%02x", 4701 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4702 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4703 /*SPRINTF("\n"); */ 4704 4705 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4706 SPRINTF 4707 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4708 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4709 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4710 acb->dcb_map[6], acb->dcb_map[7]); 4711 SPRINTF 4712 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4713 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4714 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4715 acb->dcb_map[14], acb->dcb_map[15]); 4716 4717 SPRINTF 4718 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4719 4720 dev = 0; 4721 list_for_each_entry(dcb, &acb->dcb_list, list) { 4722 int nego_period; 4723 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4724 dcb->target_lun); 4725 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4726 YESNO(dcb->sync_offset); 4727 YESNO(dcb->sync_period & WIDE_SYNC); 4728 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4729 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4730 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4731 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4732 if (dcb->sync_offset) 4733 SPRINTF(" %03i ns ", nego_period); 4734 else 4735 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4736 4737 if (dcb->sync_offset & 0x0f) { 4738 spd = 1000 / (nego_period); 4739 spd1 = 1000 % (nego_period); 4740 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4741 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4742 (dcb->sync_offset & 0x0f)); 4743 } else 4744 SPRINTF(" "); 4745 4746 /* Add more info ... */ 4747 SPRINTF(" %02i\n", dcb->max_command); 4748 dev++; 4749 } 4750 4751 if (timer_pending(&acb->waiting_timer)) 4752 SPRINTF("Waiting queue timer running\n"); 4753 else 4754 SPRINTF("\n"); 4755 4756 list_for_each_entry(dcb, &acb->dcb_list, list) { 4757 struct ScsiReqBlk *srb; 4758 if (!list_empty(&dcb->srb_waiting_list)) 4759 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4760 dcb->target_id, dcb->target_lun, 4761 list_size(&dcb->srb_waiting_list)); 4762 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4763 SPRINTF(" %li", srb->cmd->pid); 4764 if (!list_empty(&dcb->srb_going_list)) 4765 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4766 dcb->target_id, dcb->target_lun, 4767 list_size(&dcb->srb_going_list)); 4768 list_for_each_entry(srb, &dcb->srb_going_list, list) 4769 SPRINTF(" %li", srb->cmd->pid); 4770 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4771 SPRINTF("\n"); 4772 } 4773 4774 if (debug_enabled(DBG_1)) { 4775 SPRINTF("DCB list for ACB %p:\n", acb); 4776 list_for_each_entry(dcb, &acb->dcb_list, list) { 4777 SPRINTF("%p -> ", dcb); 4778 } 4779 SPRINTF("END\n"); 4780 } 4781 4782 *start = buffer + offset; 4783 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4784 4785 if (pos - buffer < offset) 4786 return 0; 4787 else if (pos - buffer - offset < length) 4788 return pos - buffer - offset; 4789 else 4790 return length; 4791} 4792 4793 4794static struct scsi_host_template dc395x_driver_template = { 4795 .module = THIS_MODULE, 4796 .proc_name = DC395X_NAME, 4797 .proc_info = dc395x_proc_info, 4798 .name = DC395X_BANNER " " DC395X_VERSION, 4799 .queuecommand = dc395x_queue_command, 4800 .bios_param = dc395x_bios_param, 4801 .slave_alloc = dc395x_slave_alloc, 4802 .slave_destroy = dc395x_slave_destroy, 4803 .can_queue = DC395x_MAX_CAN_QUEUE, 4804 .this_id = 7, 4805 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4806 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4807 .eh_abort_handler = dc395x_eh_abort, 4808 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4809 .unchecked_isa_dma = 0, 4810 .use_clustering = DISABLE_CLUSTERING, 4811}; 4812 4813 4814/** 4815 * banner_display - Display banner on first instance of driver 4816 * initialized. 4817 **/ 4818static void banner_display(void) 4819{ 4820 static int banner_done = 0; 4821 if (!banner_done) 4822 { 4823 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4824 banner_done = 1; 4825 } 4826} 4827 4828 4829/** 4830 * dc395x_init_one - Initialise a single instance of the adapter. 4831 * 4832 * The PCI layer will call this once for each instance of the adapter 4833 * that it finds in the system. The pci_dev strcuture indicates which 4834 * instance we are being called from. 4835 * 4836 * @dev: The PCI device to intialize. 4837 * @id: Looks like a pointer to the entry in our pci device table 4838 * that was actually matched by the PCI subsystem. 4839 * 4840 * Returns 0 on success, or an error code (-ve) on failure. 4841 **/ 4842static int __devinit dc395x_init_one(struct pci_dev *dev, 4843 const struct pci_device_id *id) 4844{ 4845 struct Scsi_Host *scsi_host = NULL; 4846 struct AdapterCtlBlk *acb = NULL; 4847 unsigned long io_port_base; 4848 unsigned int io_port_len; 4849 unsigned int irq; 4850 4851 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4852 banner_display(); 4853 4854 if (pci_enable_device(dev)) 4855 { 4856 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4857 return -ENODEV; 4858 } 4859 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4860 io_port_len = pci_resource_len(dev, 0); 4861 irq = dev->irq; 4862 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4863 4864 /* allocate scsi host information (includes out adapter) */ 4865 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4866 sizeof(struct AdapterCtlBlk)); 4867 if (!scsi_host) { 4868 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4869 goto fail; 4870 } 4871 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4872 acb->scsi_host = scsi_host; 4873 acb->dev = dev; 4874 4875 /* initialise the adapter and everything we need */ 4876 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4877 dprintkl(KERN_INFO, "adapter init failed\n"); 4878 goto fail; 4879 } 4880 4881 pci_set_master(dev); 4882 4883 /* get the scsi mid level to scan for new devices on the bus */ 4884 if (scsi_add_host(scsi_host, &dev->dev)) { 4885 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4886 goto fail; 4887 } 4888 pci_set_drvdata(dev, scsi_host); 4889 scsi_scan_host(scsi_host); 4890 4891 return 0; 4892 4893fail: 4894 if (acb != NULL) 4895 adapter_uninit(acb); 4896 if (scsi_host != NULL) 4897 scsi_host_put(scsi_host); 4898 pci_disable_device(dev); 4899 return -ENODEV; 4900} 4901 4902 4903/** 4904 * dc395x_remove_one - Called to remove a single instance of the 4905 * adapter. 4906 * 4907 * @dev: The PCI device to intialize. 4908 **/ 4909static void __devexit dc395x_remove_one(struct pci_dev *dev) 4910{ 4911 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4912 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4913 4914 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4915 4916 scsi_remove_host(scsi_host); 4917 adapter_uninit(acb); 4918 pci_disable_device(dev); 4919 scsi_host_put(scsi_host); 4920 pci_set_drvdata(dev, NULL); 4921} 4922 4923 4924static struct pci_device_id dc395x_pci_table[] = { 4925 { 4926 .vendor = PCI_VENDOR_ID_TEKRAM, 4927 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4928 .subvendor = PCI_ANY_ID, 4929 .subdevice = PCI_ANY_ID, 4930 }, 4931 {} /* Terminating entry */ 4932}; 4933MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4934 4935 4936static struct pci_driver dc395x_driver = { 4937 .name = DC395X_NAME, 4938 .id_table = dc395x_pci_table, 4939 .probe = dc395x_init_one, 4940 .remove = __devexit_p(dc395x_remove_one), 4941}; 4942 4943 4944/** 4945 * dc395x_module_init - Module initialization function 4946 * 4947 * Used by both module and built-in driver to initialise this driver. 4948 **/ 4949static int __init dc395x_module_init(void) 4950{ 4951 return pci_register_driver(&dc395x_driver); 4952} 4953 4954 4955/** 4956 * dc395x_module_exit - Module cleanup function. 4957 **/ 4958static void __exit dc395x_module_exit(void) 4959{ 4960 pci_unregister_driver(&dc395x_driver); 4961} 4962 4963 4964module_init(dc395x_module_init); 4965module_exit(dc395x_module_exit); 4966 4967MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4968MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4969MODULE_LICENSE("GPL"); 4970