dc395x.c revision 53a8936cb5bc95b7616cfa9e45d6145c630cea1d
1/* 2 * dc395x.c 3 * 4 * Device Driver for Tekram DC395(U/UW/F), DC315(U) 5 * PCI SCSI Bus Master Host Adapter 6 * (SCSI chip set used Tekram ASIC TRM-S1040) 7 * 8 * Authors: 9 * C.L. Huang <ching@tekram.com.tw> 10 * Erich Chen <erich@tekram.com.tw> 11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. 12 * 13 * Kurt Garloff <garloff@suse.de> 14 * (C) 1999-2000 Kurt Garloff 15 * 16 * Oliver Neukum <oliver@neukum.name> 17 * Ali Akcaagac <aliakc@web.de> 18 * Jamie Lenehan <lenehan@twibble.org> 19 * (C) 2003 20 * 21 * License: GNU GPL 22 * 23 ************************************************************************* 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. The name of the author may not be used to endorse or promote products 34 * derived from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 ************************************************************************ 48 */ 49#include <linux/module.h> 50#include <linux/moduleparam.h> 51#include <linux/delay.h> 52#include <linux/ctype.h> 53#include <linux/blkdev.h> 54#include <linux/interrupt.h> 55#include <linux/init.h> 56#include <linux/spinlock.h> 57#include <linux/pci.h> 58#include <linux/list.h> 59#include <linux/vmalloc.h> 60#include <linux/slab.h> 61#include <asm/io.h> 62 63#include <scsi/scsi.h> 64#include <scsi/scsicam.h> /* needed for scsicam_bios_param */ 65#include <scsi/scsi_cmnd.h> 66#include <scsi/scsi_device.h> 67#include <scsi/scsi_host.h> 68 69#include "dc395x.h" 70 71#define DC395X_NAME "dc395x" 72#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" 73#define DC395X_VERSION "v2.05, 2004/03/08" 74 75/*--------------------------------------------------------------------------- 76 Features 77 ---------------------------------------------------------------------------*/ 78/* 79 * Set to disable parts of the driver 80 */ 81/*#define DC395x_NO_DISCONNECT*/ 82/*#define DC395x_NO_TAGQ*/ 83/*#define DC395x_NO_SYNC*/ 84/*#define DC395x_NO_WIDE*/ 85 86/*--------------------------------------------------------------------------- 87 Debugging 88 ---------------------------------------------------------------------------*/ 89/* 90 * Types of debugging that can be enabled and disabled 91 */ 92#define DBG_KG 0x0001 93#define DBG_0 0x0002 94#define DBG_1 0x0004 95#define DBG_SG 0x0020 96#define DBG_FIFO 0x0040 97#define DBG_PIO 0x0080 98 99 100/* 101 * Set set of things to output debugging for. 102 * Undefine to remove all debugging 103 */ 104/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ 105/*#define DEBUG_MASK DBG_0*/ 106 107 108/* 109 * Output a kernel mesage at the specified level and append the 110 * driver name and a ": " to the start of the message 111 */ 112#define dprintkl(level, format, arg...) \ 113 printk(level DC395X_NAME ": " format , ## arg) 114 115 116#ifdef DEBUG_MASK 117/* 118 * print a debug message - this is formated with KERN_DEBUG, then the 119 * driver name followed by a ": " and then the message is output. 120 * This also checks that the specified debug level is enabled before 121 * outputing the message 122 */ 123#define dprintkdbg(type, format, arg...) \ 124 do { \ 125 if ((type) & (DEBUG_MASK)) \ 126 dprintkl(KERN_DEBUG , format , ## arg); \ 127 } while (0) 128 129/* 130 * Check if the specified type of debugging is enabled 131 */ 132#define debug_enabled(type) ((DEBUG_MASK) & (type)) 133 134#else 135/* 136 * No debugging. Do nothing 137 */ 138#define dprintkdbg(type, format, arg...) \ 139 do {} while (0) 140#define debug_enabled(type) (0) 141 142#endif 143 144 145#ifndef PCI_VENDOR_ID_TEKRAM 146#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ 147#endif 148#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 149#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ 150#endif 151 152 153#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) 154#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) 155 156#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) 157#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) 158#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) 159#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) 160#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) 161#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) 162 163/* cmd->result */ 164#define RES_TARGET 0x000000FF /* Target State */ 165#define RES_TARGET_LNX STATUS_MASK /* Only official ... */ 166#define RES_ENDMSG 0x0000FF00 /* End Message */ 167#define RES_DID 0x00FF0000 /* DID_ codes */ 168#define RES_DRV 0xFF000000 /* DRIVER_ codes */ 169 170#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) 171#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) 172 173#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } 174#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } 175#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } 176#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } 177#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } 178 179#define TAG_NONE 255 180 181/* 182 * srb->segement_x is the hw sg list. It is always allocated as a 183 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not 184 * cross a page boundy. 185 */ 186#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) 187 188 189struct SGentry { 190 u32 address; /* bus! address */ 191 u32 length; 192}; 193 194/* The SEEPROM structure for TRM_S1040 */ 195struct NVRamTarget { 196 u8 cfg0; /* Target configuration byte 0 */ 197 u8 period; /* Target period */ 198 u8 cfg2; /* Target configuration byte 2 */ 199 u8 cfg3; /* Target configuration byte 3 */ 200}; 201 202struct NvRamType { 203 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ 204 u8 sub_sys_id[2]; /* 2,3 Sub System ID */ 205 u8 sub_class; /* 4 Sub Class */ 206 u8 vendor_id[2]; /* 5,6 Vendor ID */ 207 u8 device_id[2]; /* 7,8 Device ID */ 208 u8 reserved; /* 9 Reserved */ 209 struct NVRamTarget target[DC395x_MAX_SCSI_ID]; 210 /** 10,11,12,13 211 ** 14,15,16,17 212 ** .... 213 ** .... 214 ** 70,71,72,73 215 */ 216 u8 scsi_id; /* 74 Host Adapter SCSI ID */ 217 u8 channel_cfg; /* 75 Channel configuration */ 218 u8 delay_time; /* 76 Power on delay time */ 219 u8 max_tag; /* 77 Maximum tags */ 220 u8 reserved0; /* 78 */ 221 u8 boot_target; /* 79 */ 222 u8 boot_lun; /* 80 */ 223 u8 reserved1; /* 81 */ 224 u16 reserved2[22]; /* 82,..125 */ 225 u16 cksum; /* 126,127 */ 226}; 227 228struct ScsiReqBlk { 229 struct list_head list; /* next/prev ptrs for srb lists */ 230 struct DeviceCtlBlk *dcb; 231 struct scsi_cmnd *cmd; 232 233 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ 234 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ 235 236 u8 sg_count; /* No of HW sg entries for this request */ 237 u8 sg_index; /* Index of HW sg entry for this request */ 238 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */ 239 size_t request_length; /* Total number of bytes in this request */ 240 /* 241 * The sense buffer handling function, request_sense, uses 242 * the first hw sg entry (segment_x[0]) and the transfer 243 * length (total_xfer_length). While doing this it stores the 244 * original values into the last sg hw list 245 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the 246 * total_xfer_length in xferred. These values are restored in 247 * pci_unmap_srb_sense. This is the only place xferred is used. 248 */ 249 size_t xferred; /* Saved copy of total_xfer_length */ 250 251 u16 state; 252 253 u8 msgin_buf[6]; 254 u8 msgout_buf[6]; 255 256 u8 adapter_status; 257 u8 target_status; 258 u8 msg_count; 259 u8 end_message; 260 261 u8 tag_number; 262 u8 status; 263 u8 retry_count; 264 u8 flag; 265 266 u8 scsi_phase; 267}; 268 269struct DeviceCtlBlk { 270 struct list_head list; /* next/prev ptrs for the dcb list */ 271 struct AdapterCtlBlk *acb; 272 struct list_head srb_going_list; /* head of going srb list */ 273 struct list_head srb_waiting_list; /* head of waiting srb list */ 274 275 struct ScsiReqBlk *active_srb; 276 u32 tag_mask; 277 278 u16 max_command; 279 280 u8 target_id; /* SCSI Target ID (SCSI Only) */ 281 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ 282 u8 identify_msg; 283 u8 dev_mode; 284 285 u8 inquiry7; /* To store Inquiry flags */ 286 u8 sync_mode; /* 0:async mode */ 287 u8 min_nego_period; /* for nego. */ 288 u8 sync_period; /* for reg. */ 289 290 u8 sync_offset; /* for reg. and nego.(low nibble) */ 291 u8 flag; 292 u8 dev_type; 293 u8 init_tcq_flag; 294}; 295 296struct AdapterCtlBlk { 297 struct Scsi_Host *scsi_host; 298 299 unsigned long io_port_base; 300 unsigned long io_port_len; 301 302 struct list_head dcb_list; /* head of going dcb list */ 303 struct DeviceCtlBlk *dcb_run_robin; 304 struct DeviceCtlBlk *active_dcb; 305 306 struct list_head srb_free_list; /* head of free srb list */ 307 struct ScsiReqBlk *tmp_srb; 308 struct timer_list waiting_timer; 309 struct timer_list selto_timer; 310 311 unsigned long last_reset; 312 313 u16 srb_count; 314 315 u8 sel_timeout; 316 317 unsigned int irq_level; 318 u8 tag_max_num; 319 u8 acb_flag; 320 u8 gmode2; 321 322 u8 config; 323 u8 lun_chk; 324 u8 scan_devices; 325 u8 hostid_bit; 326 327 u8 dcb_map[DC395x_MAX_SCSI_ID]; 328 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 329 330 struct pci_dev *dev; 331 332 u8 msg_len; 333 334 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 335 struct ScsiReqBlk srb; 336 337 struct NvRamType eeprom; /* eeprom settings for this adapter */ 338}; 339 340 341/*--------------------------------------------------------------------------- 342 Forward declarations 343 ---------------------------------------------------------------------------*/ 344static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 345 u16 *pscsi_status); 346static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 347 u16 *pscsi_status); 348static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 349 u16 *pscsi_status); 350static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 351 u16 *pscsi_status); 352static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 353 u16 *pscsi_status); 354static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 355 u16 *pscsi_status); 356static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 357 u16 *pscsi_status); 358static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 359 u16 *pscsi_status); 360static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 361 u16 *pscsi_status); 362static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 363 u16 *pscsi_status); 364static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 365 u16 *pscsi_status); 366static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 367 u16 *pscsi_status); 368static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 369 u16 *pscsi_status); 370static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 371 u16 *pscsi_status); 372static void set_basic_config(struct AdapterCtlBlk *acb); 373static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 374 struct ScsiReqBlk *srb); 375static void reset_scsi_bus(struct AdapterCtlBlk *acb); 376static void data_io_transfer(struct AdapterCtlBlk *acb, 377 struct ScsiReqBlk *srb, u16 io_dir); 378static void disconnect(struct AdapterCtlBlk *acb); 379static void reselect(struct AdapterCtlBlk *acb); 380static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 381 struct ScsiReqBlk *srb); 382static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 383 struct ScsiReqBlk *srb); 384static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 385 struct ScsiReqBlk *srb); 386static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 387 struct scsi_cmnd *cmd, u8 force); 388static void scsi_reset_detect(struct AdapterCtlBlk *acb); 389static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 390static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 391 struct ScsiReqBlk *srb); 392static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 393 struct ScsiReqBlk *srb); 394static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 395 struct ScsiReqBlk *srb); 396static void set_xfer_rate(struct AdapterCtlBlk *acb, 397 struct DeviceCtlBlk *dcb); 398static void waiting_timeout(unsigned long ptr); 399 400 401/*--------------------------------------------------------------------------- 402 Static Data 403 ---------------------------------------------------------------------------*/ 404static u16 current_sync_offset = 0; 405 406static void *dc395x_scsi_phase0[] = { 407 data_out_phase0,/* phase:0 */ 408 data_in_phase0, /* phase:1 */ 409 command_phase0, /* phase:2 */ 410 status_phase0, /* phase:3 */ 411 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 412 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 413 msgout_phase0, /* phase:6 */ 414 msgin_phase0, /* phase:7 */ 415}; 416 417static void *dc395x_scsi_phase1[] = { 418 data_out_phase1,/* phase:0 */ 419 data_in_phase1, /* phase:1 */ 420 command_phase1, /* phase:2 */ 421 status_phase1, /* phase:3 */ 422 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 423 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 424 msgout_phase1, /* phase:6 */ 425 msgin_phase1, /* phase:7 */ 426}; 427 428/* 429 *Fast20: 000 50ns, 20.0 MHz 430 * 001 75ns, 13.3 MHz 431 * 010 100ns, 10.0 MHz 432 * 011 125ns, 8.0 MHz 433 * 100 150ns, 6.6 MHz 434 * 101 175ns, 5.7 MHz 435 * 110 200ns, 5.0 MHz 436 * 111 250ns, 4.0 MHz 437 * 438 *Fast40(LVDS): 000 25ns, 40.0 MHz 439 * 001 50ns, 20.0 MHz 440 * 010 75ns, 13.3 MHz 441 * 011 100ns, 10.0 MHz 442 * 100 125ns, 8.0 MHz 443 * 101 150ns, 6.6 MHz 444 * 110 175ns, 5.7 MHz 445 * 111 200ns, 5.0 MHz 446 */ 447/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 448 449/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 450static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 451static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 452 453 454/*--------------------------------------------------------------------------- 455 Configuration 456 ---------------------------------------------------------------------------*/ 457/* 458 * Module/boot parameters currently effect *all* instances of the 459 * card in the system. 460 */ 461 462/* 463 * Command line parameters are stored in a structure below. 464 * These are the index's into the structure for the various 465 * command line options. 466 */ 467#define CFG_ADAPTER_ID 0 468#define CFG_MAX_SPEED 1 469#define CFG_DEV_MODE 2 470#define CFG_ADAPTER_MODE 3 471#define CFG_TAGS 4 472#define CFG_RESET_DELAY 5 473 474#define CFG_NUM 6 /* number of configuration items */ 475 476 477/* 478 * Value used to indicate that a command line override 479 * hasn't been used to modify the value. 480 */ 481#define CFG_PARAM_UNSET -1 482 483 484/* 485 * Hold command line parameters. 486 */ 487struct ParameterData { 488 int value; /* value of this setting */ 489 int min; /* minimum value */ 490 int max; /* maximum value */ 491 int def; /* default value */ 492 int safe; /* safe value */ 493}; 494static struct ParameterData cfg_data[] = { 495 { /* adapter id */ 496 CFG_PARAM_UNSET, 497 0, 498 15, 499 7, 500 7 501 }, 502 { /* max speed */ 503 CFG_PARAM_UNSET, 504 0, 505 7, 506 1, /* 13.3Mhz */ 507 4, /* 6.7Hmz */ 508 }, 509 { /* dev mode */ 510 CFG_PARAM_UNSET, 511 0, 512 0x3f, 513 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 514 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 515 NTC_DO_SEND_START, 516 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 517 }, 518 { /* adapter mode */ 519 CFG_PARAM_UNSET, 520 0, 521 0x2f, 522#ifdef CONFIG_SCSI_MULTI_LUN 523 NAC_SCANLUN | 524#endif 525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET 526 /*| NAC_ACTIVE_NEG*/, 527 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 528 }, 529 { /* tags */ 530 CFG_PARAM_UNSET, 531 0, 532 5, 533 3, /* 16 tags (??) */ 534 2, 535 }, 536 { /* reset delay */ 537 CFG_PARAM_UNSET, 538 0, 539 180, 540 1, /* 1 second */ 541 10, /* 10 seconds */ 542 } 543}; 544 545 546/* 547 * Safe settings. If set to zero the BIOS/default values with 548 * command line overrides will be used. If set to 1 then safe and 549 * slow settings will be used. 550 */ 551static bool use_safe_settings = 0; 552module_param_named(safe, use_safe_settings, bool, 0); 553MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); 554 555 556module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); 557MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); 558 559module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); 560MODULE_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"); 561 562module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); 563MODULE_PARM_DESC(dev_mode, "Device mode."); 564 565module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); 566MODULE_PARM_DESC(adapter_mode, "Adapter mode."); 567 568module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); 569MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); 570 571module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); 572MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); 573 574 575/** 576 * set_safe_settings - if the use_safe_settings option is set then 577 * set all values to the safe and slow values. 578 **/ 579static void set_safe_settings(void) 580{ 581 if (use_safe_settings) 582 { 583 int i; 584 585 dprintkl(KERN_INFO, "Using safe settings.\n"); 586 for (i = 0; i < CFG_NUM; i++) 587 { 588 cfg_data[i].value = cfg_data[i].safe; 589 } 590 } 591} 592 593 594/** 595 * fix_settings - reset any boot parameters which are out of range 596 * back to the default values. 597 **/ 598static void fix_settings(void) 599{ 600 int i; 601 602 dprintkdbg(DBG_1, 603 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " 604 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", 605 cfg_data[CFG_ADAPTER_ID].value, 606 cfg_data[CFG_MAX_SPEED].value, 607 cfg_data[CFG_DEV_MODE].value, 608 cfg_data[CFG_ADAPTER_MODE].value, 609 cfg_data[CFG_TAGS].value, 610 cfg_data[CFG_RESET_DELAY].value); 611 for (i = 0; i < CFG_NUM; i++) 612 { 613 if (cfg_data[i].value < cfg_data[i].min 614 || cfg_data[i].value > cfg_data[i].max) 615 cfg_data[i].value = cfg_data[i].def; 616 } 617} 618 619 620 621/* 622 * Mapping from the eeprom delay index value (index into this array) 623 * to the number of actual seconds that the delay should be for. 624 */ 625static char eeprom_index_to_delay_map[] = 626 { 1, 3, 5, 10, 16, 30, 60, 120 }; 627 628 629/** 630 * eeprom_index_to_delay - Take the eeprom delay setting and convert it 631 * into a number of seconds. 632 * 633 * @eeprom: The eeprom structure in which we find the delay index to map. 634 **/ 635static void eeprom_index_to_delay(struct NvRamType *eeprom) 636{ 637 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; 638} 639 640 641/** 642 * delay_to_eeprom_index - Take a delay in seconds and return the 643 * closest eeprom index which will delay for at least that amount of 644 * seconds. 645 * 646 * @delay: The delay, in seconds, to find the eeprom index for. 647 **/ 648static int delay_to_eeprom_index(int delay) 649{ 650 u8 idx = 0; 651 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) 652 idx++; 653 return idx; 654} 655 656 657/** 658 * eeprom_override - Override the eeprom settings, in the provided 659 * eeprom structure, with values that have been set on the command 660 * line. 661 * 662 * @eeprom: The eeprom data to override with command line options. 663 **/ 664static void eeprom_override(struct NvRamType *eeprom) 665{ 666 u8 id; 667 668 /* Adapter Settings */ 669 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) 670 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; 671 672 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) 673 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; 674 675 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) 676 eeprom->delay_time = delay_to_eeprom_index( 677 cfg_data[CFG_RESET_DELAY].value); 678 679 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) 680 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; 681 682 /* Device Settings */ 683 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { 684 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) 685 eeprom->target[id].cfg0 = 686 (u8)cfg_data[CFG_DEV_MODE].value; 687 688 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) 689 eeprom->target[id].period = 690 (u8)cfg_data[CFG_MAX_SPEED].value; 691 692 } 693} 694 695 696/*--------------------------------------------------------------------------- 697 ---------------------------------------------------------------------------*/ 698 699static unsigned int list_size(struct list_head *head) 700{ 701 unsigned int count = 0; 702 struct list_head *pos; 703 list_for_each(pos, head) 704 count++; 705 return count; 706} 707 708 709static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, 710 struct DeviceCtlBlk *pos) 711{ 712 int use_next = 0; 713 struct DeviceCtlBlk* next = NULL; 714 struct DeviceCtlBlk* i; 715 716 if (list_empty(head)) 717 return NULL; 718 719 /* find supplied dcb and then select the next one */ 720 list_for_each_entry(i, head, list) 721 if (use_next) { 722 next = i; 723 break; 724 } else if (i == pos) { 725 use_next = 1; 726 } 727 /* if no next one take the head one (ie, wraparound) */ 728 if (!next) 729 list_for_each_entry(i, head, list) { 730 next = i; 731 break; 732 } 733 734 return next; 735} 736 737 738static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 739{ 740 if (srb->tag_number < 255) { 741 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ 742 srb->tag_number = 255; 743 } 744} 745 746 747/* Find cmd in SRB list */ 748static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 749 struct list_head *head) 750{ 751 struct ScsiReqBlk *i; 752 list_for_each_entry(i, head, list) 753 if (i->cmd == cmd) 754 return i; 755 return NULL; 756} 757 758 759static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) 760{ 761 struct list_head *head = &acb->srb_free_list; 762 struct ScsiReqBlk *srb = NULL; 763 764 if (!list_empty(head)) { 765 srb = list_entry(head->next, struct ScsiReqBlk, list); 766 list_del(head->next); 767 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); 768 } 769 return srb; 770} 771 772 773static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 774{ 775 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); 776 list_add_tail(&srb->list, &acb->srb_free_list); 777} 778 779 780static void srb_waiting_insert(struct DeviceCtlBlk *dcb, 781 struct ScsiReqBlk *srb) 782{ 783 dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n", 784 srb->cmd, dcb->target_id, dcb->target_lun, srb); 785 list_add(&srb->list, &dcb->srb_waiting_list); 786} 787 788 789static void srb_waiting_append(struct DeviceCtlBlk *dcb, 790 struct ScsiReqBlk *srb) 791{ 792 dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n", 793 srb->cmd, dcb->target_id, dcb->target_lun, srb); 794 list_add_tail(&srb->list, &dcb->srb_waiting_list); 795} 796 797 798static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 799{ 800 dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n", 801 srb->cmd, dcb->target_id, dcb->target_lun, srb); 802 list_add_tail(&srb->list, &dcb->srb_going_list); 803} 804 805 806static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 807{ 808 struct ScsiReqBlk *i; 809 struct ScsiReqBlk *tmp; 810 dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n", 811 srb->cmd, dcb->target_id, dcb->target_lun, srb); 812 813 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) 814 if (i == srb) { 815 list_del(&srb->list); 816 break; 817 } 818} 819 820 821static void srb_waiting_remove(struct DeviceCtlBlk *dcb, 822 struct ScsiReqBlk *srb) 823{ 824 struct ScsiReqBlk *i; 825 struct ScsiReqBlk *tmp; 826 dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n", 827 srb->cmd, dcb->target_id, dcb->target_lun, srb); 828 829 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) 830 if (i == srb) { 831 list_del(&srb->list); 832 break; 833 } 834} 835 836 837static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, 838 struct ScsiReqBlk *srb) 839{ 840 dprintkdbg(DBG_0, 841 "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n", 842 srb->cmd, dcb->target_id, dcb->target_lun, srb); 843 list_move(&srb->list, &dcb->srb_waiting_list); 844} 845 846 847static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, 848 struct ScsiReqBlk *srb) 849{ 850 dprintkdbg(DBG_0, 851 "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n", 852 srb->cmd, dcb->target_id, dcb->target_lun, srb); 853 list_move(&srb->list, &dcb->srb_going_list); 854} 855 856 857/* Sets the timer to wake us up */ 858static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 859{ 860 if (timer_pending(&acb->waiting_timer)) 861 return; 862 init_timer(&acb->waiting_timer); 863 acb->waiting_timer.function = waiting_timeout; 864 acb->waiting_timer.data = (unsigned long) acb; 865 if (time_before(jiffies + to, acb->last_reset - HZ / 2)) 866 acb->waiting_timer.expires = 867 acb->last_reset - HZ / 2 + 1; 868 else 869 acb->waiting_timer.expires = jiffies + to + 1; 870 add_timer(&acb->waiting_timer); 871} 872 873 874/* Send the next command from the waiting list to the bus */ 875static void waiting_process_next(struct AdapterCtlBlk *acb) 876{ 877 struct DeviceCtlBlk *start = NULL; 878 struct DeviceCtlBlk *pos; 879 struct DeviceCtlBlk *dcb; 880 struct ScsiReqBlk *srb; 881 struct list_head *dcb_list_head = &acb->dcb_list; 882 883 if (acb->active_dcb 884 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 885 return; 886 887 if (timer_pending(&acb->waiting_timer)) 888 del_timer(&acb->waiting_timer); 889 890 if (list_empty(dcb_list_head)) 891 return; 892 893 /* 894 * Find the starting dcb. Need to find it again in the list 895 * since the list may have changed since we set the ptr to it 896 */ 897 list_for_each_entry(dcb, dcb_list_head, list) 898 if (dcb == acb->dcb_run_robin) { 899 start = dcb; 900 break; 901 } 902 if (!start) { 903 /* This can happen! */ 904 start = list_entry(dcb_list_head->next, typeof(*start), list); 905 acb->dcb_run_robin = start; 906 } 907 908 909 /* 910 * Loop over the dcb, but we start somewhere (potentially) in 911 * the middle of the loop so we need to manully do this. 912 */ 913 pos = start; 914 do { 915 struct list_head *waiting_list_head = &pos->srb_waiting_list; 916 917 /* Make sure, the next another device gets scheduled ... */ 918 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 919 acb->dcb_run_robin); 920 921 if (list_empty(waiting_list_head) || 922 pos->max_command <= list_size(&pos->srb_going_list)) { 923 /* move to next dcb */ 924 pos = dcb_get_next(dcb_list_head, pos); 925 } else { 926 srb = list_entry(waiting_list_head->next, 927 struct ScsiReqBlk, list); 928 929 /* Try to send to the bus */ 930 if (!start_scsi(acb, pos, srb)) 931 srb_waiting_to_going_move(pos, srb); 932 else 933 waiting_set_timer(acb, HZ/50); 934 break; 935 } 936 } while (pos != start); 937} 938 939 940/* Wake up waiting queue */ 941static void waiting_timeout(unsigned long ptr) 942{ 943 unsigned long flags; 944 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 945 dprintkdbg(DBG_1, 946 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 947 DC395x_LOCK_IO(acb->scsi_host, flags); 948 waiting_process_next(acb); 949 DC395x_UNLOCK_IO(acb->scsi_host, flags); 950} 951 952 953/* Get the DCB for a given ID/LUN combination */ 954static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 955{ 956 return acb->children[id][lun]; 957} 958 959 960/* Send SCSI Request Block (srb) to adapter (acb) */ 961static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 962{ 963 struct DeviceCtlBlk *dcb = srb->dcb; 964 965 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 966 acb->active_dcb || 967 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 968 srb_waiting_append(dcb, srb); 969 waiting_process_next(acb); 970 return; 971 } 972 973 if (!start_scsi(acb, dcb, srb)) 974 srb_going_append(dcb, srb); 975 else { 976 srb_waiting_insert(dcb, srb); 977 waiting_set_timer(acb, HZ / 50); 978 } 979} 980 981/* Prepare SRB for being sent to Device DCB w/ command *cmd */ 982static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 983 struct ScsiReqBlk *srb) 984{ 985 int nseg; 986 enum dma_data_direction dir = cmd->sc_data_direction; 987 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", 988 cmd, dcb->target_id, dcb->target_lun); 989 990 srb->dcb = dcb; 991 srb->cmd = cmd; 992 srb->sg_count = 0; 993 srb->total_xfer_length = 0; 994 srb->sg_bus_addr = 0; 995 srb->sg_index = 0; 996 srb->adapter_status = 0; 997 srb->target_status = 0; 998 srb->msg_count = 0; 999 srb->status = 0; 1000 srb->flag = 0; 1001 srb->state = 0; 1002 srb->retry_count = 0; 1003 srb->tag_number = TAG_NONE; 1004 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1005 srb->end_message = 0; 1006 1007 nseg = scsi_dma_map(cmd); 1008 BUG_ON(nseg < 0); 1009 1010 if (dir == PCI_DMA_NONE || !nseg) { 1011 dprintkdbg(DBG_0, 1012 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1013 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), 1014 srb->segment_x[0].address); 1015 } else { 1016 int i; 1017 u32 reqlen = scsi_bufflen(cmd); 1018 struct scatterlist *sg; 1019 struct SGentry *sgp = srb->segment_x; 1020 1021 srb->sg_count = nseg; 1022 1023 dprintkdbg(DBG_0, 1024 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1025 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), 1026 srb->sg_count); 1027 1028 scsi_for_each_sg(cmd, sg, srb->sg_count, i) { 1029 u32 busaddr = (u32)sg_dma_address(sg); 1030 u32 seglen = (u32)sg->length; 1031 sgp[i].address = busaddr; 1032 sgp[i].length = seglen; 1033 srb->total_xfer_length += seglen; 1034 } 1035 sgp += srb->sg_count - 1; 1036 1037 /* 1038 * adjust last page if too big as it is allocated 1039 * on even page boundaries 1040 */ 1041 if (srb->total_xfer_length > reqlen) { 1042 sgp->length -= (srb->total_xfer_length - reqlen); 1043 srb->total_xfer_length = reqlen; 1044 } 1045 1046 /* Fixup for WIDE padding - make sure length is even */ 1047 if (dcb->sync_period & WIDE_SYNC && 1048 srb->total_xfer_length % 2) { 1049 srb->total_xfer_length++; 1050 sgp->length++; 1051 } 1052 1053 srb->sg_bus_addr = pci_map_single(dcb->acb->dev, 1054 srb->segment_x, 1055 SEGMENTX_LEN, 1056 PCI_DMA_TODEVICE); 1057 1058 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 1059 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 1060 } 1061 1062 srb->request_length = srb->total_xfer_length; 1063} 1064 1065 1066/** 1067 * dc395x_queue_command - queue scsi command passed from the mid 1068 * layer, invoke 'done' on completion 1069 * 1070 * @cmd: pointer to scsi command object 1071 * @done: function pointer to be invoked on completion 1072 * 1073 * Returns 1 if the adapter (host) is busy, else returns 0. One 1074 * reason for an adapter to be busy is that the number 1075 * of outstanding queued commands is already equal to 1076 * struct Scsi_Host::can_queue . 1077 * 1078 * Required: if struct Scsi_Host::can_queue is ever non-zero 1079 * then this function is required. 1080 * 1081 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1082 * and is expected to be held on return. 1083 * 1084 **/ 1085static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1086{ 1087 struct DeviceCtlBlk *dcb; 1088 struct ScsiReqBlk *srb; 1089 struct AdapterCtlBlk *acb = 1090 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1091 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n", 1092 cmd, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 1093 1094 /* Assume BAD_TARGET; will be cleared later */ 1095 cmd->result = DID_BAD_TARGET << 16; 1096 1097 /* ignore invalid targets */ 1098 if (cmd->device->id >= acb->scsi_host->max_id || 1099 cmd->device->lun >= acb->scsi_host->max_lun || 1100 cmd->device->lun >31) { 1101 goto complete; 1102 } 1103 1104 /* does the specified lun on the specified device exist */ 1105 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1106 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1107 cmd->device->id, cmd->device->lun); 1108 goto complete; 1109 } 1110 1111 /* do we have a DCB for the device */ 1112 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1113 if (!dcb) { 1114 /* should never happen */ 1115 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1116 cmd->device->id, cmd->device->lun); 1117 goto complete; 1118 } 1119 1120 /* set callback and clear result in the command */ 1121 cmd->scsi_done = done; 1122 cmd->result = 0; 1123 1124 srb = srb_get_free(acb); 1125 if (!srb) 1126 { 1127 /* 1128 * Return 1 since we are unable to queue this command at this 1129 * point in time. 1130 */ 1131 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1132 return 1; 1133 } 1134 1135 build_srb(cmd, dcb, srb); 1136 1137 if (!list_empty(&dcb->srb_waiting_list)) { 1138 /* append to waiting queue */ 1139 srb_waiting_append(dcb, srb); 1140 waiting_process_next(acb); 1141 } else { 1142 /* process immediately */ 1143 send_srb(acb, srb); 1144 } 1145 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); 1146 return 0; 1147 1148complete: 1149 /* 1150 * Complete the command immediatey, and then return 0 to 1151 * indicate that we have handled the command. This is usually 1152 * done when the commad is for things like non existent 1153 * devices. 1154 */ 1155 done(cmd); 1156 return 0; 1157} 1158 1159static DEF_SCSI_QCMD(dc395x_queue_command) 1160 1161/* 1162 * Return the disk geometry for the given SCSI device. 1163 */ 1164static int dc395x_bios_param(struct scsi_device *sdev, 1165 struct block_device *bdev, sector_t capacity, int *info) 1166{ 1167#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1168 int heads, sectors, cylinders; 1169 struct AdapterCtlBlk *acb; 1170 int size = capacity; 1171 1172 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1173 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1174 heads = 64; 1175 sectors = 32; 1176 cylinders = size / (heads * sectors); 1177 1178 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1179 heads = 255; 1180 sectors = 63; 1181 cylinders = size / (heads * sectors); 1182 } 1183 geom[0] = heads; 1184 geom[1] = sectors; 1185 geom[2] = cylinders; 1186 return 0; 1187#else 1188 return scsicam_bios_param(bdev, capacity, info); 1189#endif 1190} 1191 1192 1193static void dump_register_info(struct AdapterCtlBlk *acb, 1194 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1195{ 1196 u16 pstat; 1197 struct pci_dev *dev = acb->dev; 1198 pci_read_config_word(dev, PCI_STATUS, &pstat); 1199 if (!dcb) 1200 dcb = acb->active_dcb; 1201 if (!srb && dcb) 1202 srb = dcb->active_srb; 1203 if (srb) { 1204 if (!srb->cmd) 1205 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1206 srb, srb->cmd); 1207 else 1208 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p " 1209 "cmnd=0x%02x <%02i-%i>\n", 1210 srb, srb->cmd, 1211 srb->cmd->cmnd[0], srb->cmd->device->id, 1212 srb->cmd->device->lun); 1213 printk(" sglist=%p cnt=%i idx=%i len=%zu\n", 1214 srb->segment_x, srb->sg_count, srb->sg_index, 1215 srb->total_xfer_length); 1216 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1217 srb->state, srb->status, srb->scsi_phase, 1218 (acb->active_dcb) ? "" : "not"); 1219 } 1220 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1221 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1222 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1223 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1224 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1225 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1226 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1227 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1228 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1229 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1230 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1231 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1232 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1233 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1234 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1235 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1236 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1237 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1238 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1239 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1240 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1241 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1242 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1243 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1244 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1245 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1246 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1247 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1248 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1249 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1250 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1251 "pci{status=0x%04x}\n", 1252 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1253 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1254 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1255 pstat); 1256} 1257 1258 1259static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1260{ 1261#if debug_enabled(DBG_FIFO) 1262 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1263 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1264 if (!(fifocnt & 0x40)) 1265 dprintkdbg(DBG_FIFO, 1266 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1267 fifocnt & 0x3f, lines, txt); 1268#endif 1269 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1270} 1271 1272 1273static void reset_dev_param(struct AdapterCtlBlk *acb) 1274{ 1275 struct DeviceCtlBlk *dcb; 1276 struct NvRamType *eeprom = &acb->eeprom; 1277 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1278 1279 list_for_each_entry(dcb, &acb->dcb_list, list) { 1280 u8 period_index; 1281 1282 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1283 dcb->sync_period = 0; 1284 dcb->sync_offset = 0; 1285 1286 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1287 period_index = eeprom->target[dcb->target_id].period & 0x07; 1288 dcb->min_nego_period = clock_period[period_index]; 1289 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1290 || !(acb->config & HCC_WIDE_CARD)) 1291 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1292 } 1293} 1294 1295 1296/* 1297 * perform a hard reset on the SCSI bus 1298 * @cmd - some command for this host (for fetching hooks) 1299 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1300 */ 1301static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1302{ 1303 struct AdapterCtlBlk *acb = 1304 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1305 dprintkl(KERN_INFO, 1306 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n", 1307 cmd, cmd->device->id, cmd->device->lun, cmd); 1308 1309 if (timer_pending(&acb->waiting_timer)) 1310 del_timer(&acb->waiting_timer); 1311 1312 /* 1313 * disable interrupt 1314 */ 1315 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1316 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1317 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1318 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1319 1320 reset_scsi_bus(acb); 1321 udelay(500); 1322 1323 /* We may be in serious trouble. Wait some seconds */ 1324 acb->last_reset = 1325 jiffies + 3 * HZ / 2 + 1326 HZ * acb->eeprom.delay_time; 1327 1328 /* 1329 * re-enable interrupt 1330 */ 1331 /* Clear SCSI FIFO */ 1332 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1333 clear_fifo(acb, "eh_bus_reset"); 1334 /* Delete pending IRQ */ 1335 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1336 set_basic_config(acb); 1337 1338 reset_dev_param(acb); 1339 doing_srb_done(acb, DID_RESET, cmd, 0); 1340 acb->active_dcb = NULL; 1341 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1342 waiting_process_next(acb); 1343 1344 return SUCCESS; 1345} 1346 1347static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1348{ 1349 int rc; 1350 1351 spin_lock_irq(cmd->device->host->host_lock); 1352 rc = __dc395x_eh_bus_reset(cmd); 1353 spin_unlock_irq(cmd->device->host->host_lock); 1354 1355 return rc; 1356} 1357 1358/* 1359 * abort an errant SCSI command 1360 * @cmd - command to be aborted 1361 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1362 */ 1363static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1364{ 1365 /* 1366 * Look into our command queues: If it has not been sent already, 1367 * we remove it and return success. Otherwise fail. 1368 */ 1369 struct AdapterCtlBlk *acb = 1370 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1371 struct DeviceCtlBlk *dcb; 1372 struct ScsiReqBlk *srb; 1373 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n", 1374 cmd, cmd->device->id, cmd->device->lun, cmd); 1375 1376 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1377 if (!dcb) { 1378 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1379 return FAILED; 1380 } 1381 1382 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1383 if (srb) { 1384 srb_waiting_remove(dcb, srb); 1385 pci_unmap_srb_sense(acb, srb); 1386 pci_unmap_srb(acb, srb); 1387 free_tag(dcb, srb); 1388 srb_free_insert(acb, srb); 1389 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1390 cmd->result = DID_ABORT << 16; 1391 return SUCCESS; 1392 } 1393 srb = find_cmd(cmd, &dcb->srb_going_list); 1394 if (srb) { 1395 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); 1396 /* XXX: Should abort the command here */ 1397 } else { 1398 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); 1399 } 1400 return FAILED; 1401} 1402 1403 1404/* SDTR */ 1405static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1406 struct ScsiReqBlk *srb) 1407{ 1408 u8 *ptr = srb->msgout_buf + srb->msg_count; 1409 if (srb->msg_count > 1) { 1410 dprintkl(KERN_INFO, 1411 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1412 srb->msg_count, srb->msgout_buf[0], 1413 srb->msgout_buf[1]); 1414 return; 1415 } 1416 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1417 dcb->sync_offset = 0; 1418 dcb->min_nego_period = 200 >> 2; 1419 } else if (dcb->sync_offset == 0) 1420 dcb->sync_offset = SYNC_NEGO_OFFSET; 1421 1422 *ptr++ = MSG_EXTENDED; /* (01h) */ 1423 *ptr++ = 3; /* length */ 1424 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1425 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1426 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1427 srb->msg_count += 5; 1428 srb->state |= SRB_DO_SYNC_NEGO; 1429} 1430 1431 1432/* WDTR */ 1433static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1434 struct ScsiReqBlk *srb) 1435{ 1436 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1437 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1438 u8 *ptr = srb->msgout_buf + srb->msg_count; 1439 if (srb->msg_count > 1) { 1440 dprintkl(KERN_INFO, 1441 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1442 srb->msg_count, srb->msgout_buf[0], 1443 srb->msgout_buf[1]); 1444 return; 1445 } 1446 *ptr++ = MSG_EXTENDED; /* (01h) */ 1447 *ptr++ = 2; /* length */ 1448 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1449 *ptr++ = wide; 1450 srb->msg_count += 4; 1451 srb->state |= SRB_DO_WIDE_NEGO; 1452} 1453 1454 1455#if 0 1456/* Timer to work around chip flaw: When selecting and the bus is 1457 * busy, we sometimes miss a Selection timeout IRQ */ 1458void selection_timeout_missed(unsigned long ptr); 1459/* Sets the timer to wake us up */ 1460static void selto_timer(struct AdapterCtlBlk *acb) 1461{ 1462 if (timer_pending(&acb->selto_timer)) 1463 return; 1464 acb->selto_timer.function = selection_timeout_missed; 1465 acb->selto_timer.data = (unsigned long) acb; 1466 if (time_before 1467 (jiffies + HZ, acb->last_reset + HZ / 2)) 1468 acb->selto_timer.expires = 1469 acb->last_reset + HZ / 2 + 1; 1470 else 1471 acb->selto_timer.expires = jiffies + HZ + 1; 1472 add_timer(&acb->selto_timer); 1473} 1474 1475 1476void selection_timeout_missed(unsigned long ptr) 1477{ 1478 unsigned long flags; 1479 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1480 struct ScsiReqBlk *srb; 1481 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1482 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1483 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1484 return; 1485 } 1486 DC395x_LOCK_IO(acb->scsi_host, flags); 1487 srb = acb->active_dcb->active_srb; 1488 disconnect(acb); 1489 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1490} 1491#endif 1492 1493 1494static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1495 struct ScsiReqBlk* srb) 1496{ 1497 u16 s_stat2, return_code; 1498 u8 s_stat, scsicommand, i, identify_message; 1499 u8 *ptr; 1500 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", 1501 dcb->target_id, dcb->target_lun, srb); 1502 1503 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1504 1505 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1506 s_stat2 = 0; 1507 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1508#if 1 1509 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1510 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n", 1511 s_stat, s_stat2); 1512 /* 1513 * Try anyway? 1514 * 1515 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1516 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed! 1517 * (This is likely to be a bug in the hardware. Obviously, most people 1518 * only have one initiator per SCSI bus.) 1519 * Instead let this fail and have the timer make sure the command is 1520 * tried again after a short time 1521 */ 1522 /*selto_timer (acb); */ 1523 return 1; 1524 } 1525#endif 1526 if (acb->active_dcb) { 1527 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a" 1528 "command while another command (0x%p) is active.", 1529 srb->cmd, 1530 acb->active_dcb->active_srb ? 1531 acb->active_dcb->active_srb->cmd : 0); 1532 return 1; 1533 } 1534 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1535 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); 1536 return 1; 1537 } 1538 /* Allow starting of SCSI commands half a second before we allow the mid-level 1539 * to queue them again after a reset */ 1540 if (time_before(jiffies, acb->last_reset - HZ / 2)) { 1541 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1542 return 1; 1543 } 1544 1545 /* Flush FIFO */ 1546 clear_fifo(acb, "start_scsi"); 1547 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1548 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1549 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1550 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1551 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1552 1553 identify_message = dcb->identify_msg; 1554 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1555 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1556 if (srb->flag & AUTO_REQSENSE) 1557 identify_message &= 0xBF; 1558 1559 if (((srb->cmd->cmnd[0] == INQUIRY) 1560 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1561 || (srb->flag & AUTO_REQSENSE)) 1562 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1563 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1564 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1565 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1566 && (dcb->target_lun == 0)) { 1567 srb->msgout_buf[0] = identify_message; 1568 srb->msg_count = 1; 1569 scsicommand = SCMD_SEL_ATNSTOP; 1570 srb->state = SRB_MSGOUT; 1571#ifndef SYNC_FIRST 1572 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1573 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1574 build_wdtr(acb, dcb, srb); 1575 goto no_cmd; 1576 } 1577#endif 1578 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1579 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1580 build_sdtr(acb, dcb, srb); 1581 goto no_cmd; 1582 } 1583 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1584 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1585 build_wdtr(acb, dcb, srb); 1586 goto no_cmd; 1587 } 1588 srb->msg_count = 0; 1589 } 1590 /* Send identify message */ 1591 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1592 1593 scsicommand = SCMD_SEL_ATN; 1594 srb->state = SRB_START_; 1595#ifndef DC395x_NO_TAGQ 1596 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1597 && (identify_message & 0xC0)) { 1598 /* Send Tag message */ 1599 u32 tag_mask = 1; 1600 u8 tag_number = 0; 1601 while (tag_mask & dcb->tag_mask 1602 && tag_number < dcb->max_command) { 1603 tag_mask = tag_mask << 1; 1604 tag_number++; 1605 } 1606 if (tag_number >= dcb->max_command) { 1607 dprintkl(KERN_WARNING, "start_scsi: (0x%p) " 1608 "Out of tags target=<%02i-%i>)\n", 1609 srb->cmd, srb->cmd->device->id, 1610 srb->cmd->device->lun); 1611 srb->state = SRB_READY; 1612 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1613 DO_HWRESELECT); 1614 return 1; 1615 } 1616 /* Send Tag id */ 1617 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1618 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1619 dcb->tag_mask |= tag_mask; 1620 srb->tag_number = tag_number; 1621 scsicommand = SCMD_SEL_ATN3; 1622 srb->state = SRB_START_; 1623 } 1624#endif 1625/*polling:*/ 1626 /* Send CDB ..command block ......... */ 1627 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", 1628 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun, 1629 srb->cmd->cmnd[0], srb->tag_number); 1630 if (srb->flag & AUTO_REQSENSE) { 1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1635 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1636 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1637 } else { 1638 ptr = (u8 *)srb->cmd->cmnd; 1639 for (i = 0; i < srb->cmd->cmd_len; i++) 1640 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1641 } 1642 no_cmd: 1643 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1644 DO_HWRESELECT | DO_DATALATCH); 1645 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1646 /* 1647 * If start_scsi return 1: 1648 * we caught an interrupt (must be reset or reselection ... ) 1649 * : Let's process it first! 1650 */ 1651 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n", 1652 srb->cmd, dcb->target_id, dcb->target_lun); 1653 srb->state = SRB_READY; 1654 free_tag(dcb, srb); 1655 srb->msg_count = 0; 1656 return_code = 1; 1657 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1658 } else { 1659 /* 1660 * If start_scsi returns 0: 1661 * we know that the SCSI processor is free 1662 */ 1663 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1664 dcb->active_srb = srb; 1665 acb->active_dcb = dcb; 1666 return_code = 0; 1667 /* it's important for atn stop */ 1668 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1669 DO_DATALATCH | DO_HWRESELECT); 1670 /* SCSI command */ 1671 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1672 } 1673 return return_code; 1674} 1675 1676 1677#define DC395x_ENABLE_MSGOUT \ 1678 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1679 srb->state |= SRB_MSGOUT 1680 1681 1682/* abort command */ 1683static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1684 struct ScsiReqBlk *srb) 1685{ 1686 srb->msgout_buf[0] = ABORT; 1687 srb->msg_count = 1; 1688 DC395x_ENABLE_MSGOUT; 1689 srb->state &= ~SRB_MSGIN; 1690 srb->state |= SRB_MSGOUT; 1691} 1692 1693 1694/** 1695 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1696 * have been triggered for this card. 1697 * 1698 * @acb: a pointer to the adpter control block 1699 * @scsi_status: the status return when we checked the card 1700 **/ 1701static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1702 u16 scsi_status) 1703{ 1704 struct DeviceCtlBlk *dcb; 1705 struct ScsiReqBlk *srb; 1706 u16 phase; 1707 u8 scsi_intstatus; 1708 unsigned long flags; 1709 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1710 u16 *); 1711 1712 DC395x_LOCK_IO(acb->scsi_host, flags); 1713 1714 /* This acknowledges the IRQ */ 1715 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1716 if ((scsi_status & 0x2007) == 0x2002) 1717 dprintkl(KERN_DEBUG, 1718 "COP after COP completed? %04x\n", scsi_status); 1719 if (debug_enabled(DBG_KG)) { 1720 if (scsi_intstatus & INT_SELTIMEOUT) 1721 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1722 } 1723 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1724 1725 if (timer_pending(&acb->selto_timer)) 1726 del_timer(&acb->selto_timer); 1727 1728 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1729 disconnect(acb); /* bus free interrupt */ 1730 goto out_unlock; 1731 } 1732 if (scsi_intstatus & INT_RESELECTED) { 1733 reselect(acb); 1734 goto out_unlock; 1735 } 1736 if (scsi_intstatus & INT_SELECT) { 1737 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1738 goto out_unlock; 1739 } 1740 if (scsi_intstatus & INT_SCSIRESET) { 1741 scsi_reset_detect(acb); 1742 goto out_unlock; 1743 } 1744 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1745 dcb = acb->active_dcb; 1746 if (!dcb) { 1747 dprintkl(KERN_DEBUG, 1748 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1749 scsi_status, scsi_intstatus); 1750 goto out_unlock; 1751 } 1752 srb = dcb->active_srb; 1753 if (dcb->flag & ABORT_DEV_) { 1754 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1755 enable_msgout_abort(acb, srb); 1756 } 1757 1758 /* software sequential machine */ 1759 phase = (u16)srb->scsi_phase; 1760 1761 /* 1762 * 62037 or 62137 1763 * call dc395x_scsi_phase0[]... "phase entry" 1764 * handle every phase before start transfer 1765 */ 1766 /* data_out_phase0, phase:0 */ 1767 /* data_in_phase0, phase:1 */ 1768 /* command_phase0, phase:2 */ 1769 /* status_phase0, phase:3 */ 1770 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1771 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1772 /* msgout_phase0, phase:6 */ 1773 /* msgin_phase0, phase:7 */ 1774 dc395x_statev = dc395x_scsi_phase0[phase]; 1775 dc395x_statev(acb, srb, &scsi_status); 1776 1777 /* 1778 * if there were any exception occurred scsi_status 1779 * will be modify to bus free phase new scsi_status 1780 * transfer out from ... previous dc395x_statev 1781 */ 1782 srb->scsi_phase = scsi_status & PHASEMASK; 1783 phase = (u16)scsi_status & PHASEMASK; 1784 1785 /* 1786 * call dc395x_scsi_phase1[]... "phase entry" handle 1787 * every phase to do transfer 1788 */ 1789 /* data_out_phase1, phase:0 */ 1790 /* data_in_phase1, phase:1 */ 1791 /* command_phase1, phase:2 */ 1792 /* status_phase1, phase:3 */ 1793 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1794 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1795 /* msgout_phase1, phase:6 */ 1796 /* msgin_phase1, phase:7 */ 1797 dc395x_statev = dc395x_scsi_phase1[phase]; 1798 dc395x_statev(acb, srb, &scsi_status); 1799 } 1800 out_unlock: 1801 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1802} 1803 1804 1805static irqreturn_t dc395x_interrupt(int irq, void *dev_id) 1806{ 1807 struct AdapterCtlBlk *acb = dev_id; 1808 u16 scsi_status; 1809 u8 dma_status; 1810 irqreturn_t handled = IRQ_NONE; 1811 1812 /* 1813 * Check for pending interrupt 1814 */ 1815 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1816 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1817 if (scsi_status & SCSIINTERRUPT) { 1818 /* interrupt pending - let's process it! */ 1819 dc395x_handle_interrupt(acb, scsi_status); 1820 handled = IRQ_HANDLED; 1821 } 1822 else if (dma_status & 0x20) { 1823 /* Error from the DMA engine */ 1824 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1825#if 0 1826 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1827 if (acb->active_dcb) { 1828 acb->active_dcb-> flag |= ABORT_DEV_; 1829 if (acb->active_dcb->active_srb) 1830 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1831 } 1832 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1833#else 1834 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1835 acb = NULL; 1836#endif 1837 handled = IRQ_HANDLED; 1838 } 1839 1840 return handled; 1841} 1842 1843 1844static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1845 u16 *pscsi_status) 1846{ 1847 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd); 1848 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1849 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1850 1851 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1852 srb->state &= ~SRB_MSGOUT; 1853} 1854 1855 1856static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1857 u16 *pscsi_status) 1858{ 1859 u16 i; 1860 u8 *ptr; 1861 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd); 1862 1863 clear_fifo(acb, "msgout_phase1"); 1864 if (!(srb->state & SRB_MSGOUT)) { 1865 srb->state |= SRB_MSGOUT; 1866 dprintkl(KERN_DEBUG, 1867 "msgout_phase1: (0x%p) Phase unexpected\n", 1868 srb->cmd); /* So what ? */ 1869 } 1870 if (!srb->msg_count) { 1871 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", 1872 srb->cmd); 1873 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1874 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1875 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1876 return; 1877 } 1878 ptr = (u8 *)srb->msgout_buf; 1879 for (i = 0; i < srb->msg_count; i++) 1880 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1881 srb->msg_count = 0; 1882 if (srb->msgout_buf[0] == MSG_ABORT) 1883 srb->state = SRB_ABORT_SENT; 1884 1885 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1886} 1887 1888 1889static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1890 u16 *pscsi_status) 1891{ 1892 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd); 1893 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1894} 1895 1896 1897static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1898 u16 *pscsi_status) 1899{ 1900 struct DeviceCtlBlk *dcb; 1901 u8 *ptr; 1902 u16 i; 1903 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd); 1904 1905 clear_fifo(acb, "command_phase1"); 1906 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1907 if (!(srb->flag & AUTO_REQSENSE)) { 1908 ptr = (u8 *)srb->cmd->cmnd; 1909 for (i = 0; i < srb->cmd->cmd_len; i++) { 1910 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1911 ptr++; 1912 } 1913 } else { 1914 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1915 dcb = acb->active_dcb; 1916 /* target id */ 1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1919 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1920 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1921 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1922 } 1923 srb->state |= SRB_COMMAND; 1924 /* it's important for atn stop */ 1925 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1926 /* SCSI command */ 1927 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1928} 1929 1930 1931/* 1932 * Verify that the remaining space in the hw sg lists is the same as 1933 * the count of remaining bytes in srb->total_xfer_length 1934 */ 1935static void sg_verify_length(struct ScsiReqBlk *srb) 1936{ 1937 if (debug_enabled(DBG_SG)) { 1938 unsigned len = 0; 1939 unsigned idx = srb->sg_index; 1940 struct SGentry *psge = srb->segment_x + idx; 1941 for (; idx < srb->sg_count; psge++, idx++) 1942 len += psge->length; 1943 if (len != srb->total_xfer_length) 1944 dprintkdbg(DBG_SG, 1945 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1946 srb->total_xfer_length, len); 1947 } 1948} 1949 1950 1951/* 1952 * Compute the next Scatter Gather list index and adjust its length 1953 * and address if necessary 1954 */ 1955static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1956{ 1957 u8 idx; 1958 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */ 1959 struct SGentry *psge = srb->segment_x + srb->sg_index; 1960 1961 dprintkdbg(DBG_0, 1962 "sg_update_list: Transferred %i of %i bytes, %i remain\n", 1963 xferred, srb->total_xfer_length, left); 1964 if (xferred == 0) { 1965 /* nothing to update since we did not transfer any data */ 1966 return; 1967 } 1968 1969 sg_verify_length(srb); 1970 srb->total_xfer_length = left; /* update remaining count */ 1971 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1972 if (xferred >= psge->length) { 1973 /* Complete SG entries done */ 1974 xferred -= psge->length; 1975 } else { 1976 /* Partial SG entry done */ 1977 psge->length -= xferred; 1978 psge->address += xferred; 1979 srb->sg_index = idx; 1980 pci_dma_sync_single_for_device(srb->dcb-> 1981 acb->dev, 1982 srb->sg_bus_addr, 1983 SEGMENTX_LEN, 1984 PCI_DMA_TODEVICE); 1985 break; 1986 } 1987 psge++; 1988 } 1989 sg_verify_length(srb); 1990} 1991 1992 1993/* 1994 * We have transferred a single byte (PIO mode?) and need to update 1995 * the count of bytes remaining (total_xfer_length) and update the sg 1996 * entry to either point to next byte in the current sg entry, or of 1997 * already at the end to point to the start of the next sg entry 1998 */ 1999static void sg_subtract_one(struct ScsiReqBlk *srb) 2000{ 2001 sg_update_list(srb, srb->total_xfer_length - 1); 2002} 2003 2004 2005/* 2006 * cleanup_after_transfer 2007 * 2008 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2009 * KG: Currently called from StatusPhase1 () 2010 * Should probably also be called from other places 2011 * Best might be to call it in DataXXPhase0, if new phase will differ 2012 */ 2013static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2014 struct ScsiReqBlk *srb) 2015{ 2016 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2017 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2018 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2019 clear_fifo(acb, "cleanup/in"); 2020 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2021 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2022 } else { /* write */ 2023 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2024 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2025 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2026 clear_fifo(acb, "cleanup/out"); 2027 } 2028 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2029} 2030 2031 2032/* 2033 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO 2034 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2035 */ 2036#define DC395x_LASTPIO 4 2037 2038 2039static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2040 u16 *pscsi_status) 2041{ 2042 struct DeviceCtlBlk *dcb = srb->dcb; 2043 u16 scsi_status = *pscsi_status; 2044 u32 d_left_counter = 0; 2045 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n", 2046 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2047 2048 /* 2049 * KG: We need to drain the buffers before we draw any conclusions! 2050 * This means telling the DMA to push the rest into SCSI, telling 2051 * SCSI to push the rest to the bus. 2052 * However, the device might have been the one to stop us (phase 2053 * change), and the data in transit just needs to be accounted so 2054 * it can be retransmitted.) 2055 */ 2056 /* 2057 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2058 * If we need more data, the DMA SG list will be freshly set up, anyway 2059 */ 2060 dprintkdbg(DBG_PIO, "data_out_phase0: " 2061 "DMA{fifocnt=0x%02x fifostat=0x%02x} " 2062 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2063 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2064 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2065 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2066 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2067 srb->total_xfer_length); 2068 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2069 2070 if (!(srb->state & SRB_XFERPAD)) { 2071 if (scsi_status & PARITYERROR) 2072 srb->status |= PARITY_ERROR; 2073 2074 /* 2075 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2076 * is the no of bytes it got from the DMA engine not the no it 2077 * transferred successfully to the device. (And the difference could 2078 * be as much as the FIFO size, I guess ...) 2079 */ 2080 if (!(scsi_status & SCSIXFERDONE)) { 2081 /* 2082 * when data transfer from DMA FIFO to SCSI FIFO 2083 * if there was some data left in SCSI FIFO 2084 */ 2085 d_left_counter = 2086 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2087 0x1F); 2088 if (dcb->sync_period & WIDE_SYNC) 2089 d_left_counter <<= 1; 2090 2091 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2092 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2093 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2094 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2095 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2096 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2097 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2098 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2099 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2100 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2101 } 2102 /* 2103 * calculate all the residue data that not yet tranfered 2104 * SCSI transfer counter + left in SCSI FIFO data 2105 * 2106 * .....TRM_S1040_SCSI_COUNTER (24bits) 2107 * The counter always decrement by one for every SCSI byte transfer. 2108 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2109 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2110 */ 2111 if (srb->total_xfer_length > DC395x_LASTPIO) 2112 d_left_counter += 2113 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2114 2115 /* Is this a good idea? */ 2116 /*clear_fifo(acb, "DOP1"); */ 2117 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2118 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2119 && scsi_bufflen(srb->cmd) % 2) { 2120 d_left_counter = 0; 2121 dprintkl(KERN_INFO, 2122 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2123 scsi_status); 2124 } 2125 /* 2126 * KG: Oops again. Same thinko as above: The SCSI might have been 2127 * faster than the DMA engine, so that it ran out of data. 2128 * In that case, we have to do just nothing! 2129 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2130 */ 2131 /* 2132 * KG: This is nonsense: We have been WRITING data to the bus 2133 * If the SCSI engine has no bytes left, how should the DMA engine? 2134 */ 2135 if (d_left_counter == 0) { 2136 srb->total_xfer_length = 0; 2137 } else { 2138 /* 2139 * if transfer not yet complete 2140 * there were some data residue in SCSI FIFO or 2141 * SCSI transfer counter not empty 2142 */ 2143 long oldxferred = 2144 srb->total_xfer_length - d_left_counter; 2145 const int diff = 2146 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2147 sg_update_list(srb, d_left_counter); 2148 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2149 if ((srb->segment_x[srb->sg_index].length == 2150 diff && scsi_sg_count(srb->cmd)) 2151 || ((oldxferred & ~PAGE_MASK) == 2152 (PAGE_SIZE - diff)) 2153 ) { 2154 dprintkl(KERN_INFO, "data_out_phase0: " 2155 "Work around chip bug (%i)?\n", diff); 2156 d_left_counter = 2157 srb->total_xfer_length - diff; 2158 sg_update_list(srb, d_left_counter); 2159 /*srb->total_xfer_length -= diff; */ 2160 /*srb->virt_addr += diff; */ 2161 /*if (srb->cmd->use_sg) */ 2162 /* srb->sg_index++; */ 2163 } 2164 } 2165 } 2166 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2167 cleanup_after_transfer(acb, srb); 2168 } 2169} 2170 2171 2172static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2173 u16 *pscsi_status) 2174{ 2175 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n", 2176 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2177 clear_fifo(acb, "data_out_phase1"); 2178 /* do prepare before transfer when data out phase */ 2179 data_io_transfer(acb, srb, XFERDATAOUT); 2180} 2181 2182static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2183 u16 *pscsi_status) 2184{ 2185 u16 scsi_status = *pscsi_status; 2186 2187 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n", 2188 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2189 2190 /* 2191 * KG: DataIn is much more tricky than DataOut. When the device is finished 2192 * and switches to another phase, the SCSI engine should be finished too. 2193 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2194 * engine and transferred to memory. 2195 * We should wait for the FIFOs to be emptied by that (is there any way to 2196 * enforce this?) and then stop the DMA engine, because it might think, that 2197 * there are more bytes to follow. Yes, the device might disconnect prior to 2198 * having all bytes transferred! 2199 * Also we should make sure that all data from the DMA engine buffer's really 2200 * made its way to the system memory! Some documentation on this would not 2201 * seem to be a bad idea, actually. 2202 */ 2203 if (!(srb->state & SRB_XFERPAD)) { 2204 u32 d_left_counter; 2205 unsigned int sc, fc; 2206 2207 if (scsi_status & PARITYERROR) { 2208 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) " 2209 "Parity Error\n", srb->cmd); 2210 srb->status |= PARITY_ERROR; 2211 } 2212 /* 2213 * KG: We should wait for the DMA FIFO to be empty ... 2214 * but: it would be better to wait first for the SCSI FIFO and then the 2215 * the DMA FIFO to become empty? How do we know, that the device not already 2216 * sent data to the FIFO in a MsgIn phase, eg.? 2217 */ 2218 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2219#if 0 2220 int ctr = 6000000; 2221 dprintkl(KERN_DEBUG, 2222 "DIP0: Wait for DMA FIFO to flush ...\n"); 2223 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2224 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2225 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2226 while (! 2227 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2228 0x80) && --ctr); 2229 if (ctr < 6000000 - 1) 2230 dprintkl(KERN_DEBUG 2231 "DIP0: Had to wait for DMA ...\n"); 2232 if (!ctr) 2233 dprintkl(KERN_ERR, 2234 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2235 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2236#endif 2237 dprintkdbg(DBG_KG, "data_in_phase0: " 2238 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2239 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2240 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2241 } 2242 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2243 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2244 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2245 d_left_counter = sc + ((fc & 0x1f) 2246 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2247 0)); 2248 dprintkdbg(DBG_KG, "data_in_phase0: " 2249 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2250 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2251 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2252 fc, 2253 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2254 sc, 2255 fc, 2256 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2257 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2258 srb->total_xfer_length, d_left_counter); 2259#if DC395x_LASTPIO 2260 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */ 2261 if (d_left_counter 2262 && srb->total_xfer_length <= DC395x_LASTPIO) { 2263 size_t left_io = srb->total_xfer_length; 2264 2265 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2266 /*sg_update_list (srb, d_left_counter); */ 2267 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " 2268 "for remaining %i bytes:", 2269 fc & 0x1f, 2270 (srb->dcb->sync_period & WIDE_SYNC) ? 2271 "words" : "bytes", 2272 srb->total_xfer_length); 2273 if (srb->dcb->sync_period & WIDE_SYNC) 2274 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2275 CFG2_WIDEFIFO); 2276 while (left_io) { 2277 unsigned char *virt, *base = NULL; 2278 unsigned long flags = 0; 2279 size_t len = left_io; 2280 size_t offset = srb->request_length - left_io; 2281 2282 local_irq_save(flags); 2283 /* Assumption: it's inside one page as it's at most 4 bytes and 2284 I just assume it's on a 4-byte boundary */ 2285 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2286 srb->sg_count, &offset, &len); 2287 virt = base + offset; 2288 2289 left_io -= len; 2290 2291 while (len) { 2292 u8 byte; 2293 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2294 *virt++ = byte; 2295 2296 if (debug_enabled(DBG_PIO)) 2297 printk(" %02x", byte); 2298 2299 d_left_counter--; 2300 sg_subtract_one(srb); 2301 2302 len--; 2303 2304 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2305 2306 if (fc == 0x40) { 2307 left_io = 0; 2308 break; 2309 } 2310 } 2311 2312 WARN_ON((fc != 0x40) == !d_left_counter); 2313 2314 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { 2315 /* Read the last byte ... */ 2316 if (srb->total_xfer_length > 0) { 2317 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2318 2319 *virt++ = byte; 2320 srb->total_xfer_length--; 2321 if (debug_enabled(DBG_PIO)) 2322 printk(" %02x", byte); 2323 } 2324 2325 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2326 } 2327 2328 scsi_kunmap_atomic_sg(base); 2329 local_irq_restore(flags); 2330 } 2331 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2332 /*srb->total_xfer_length = 0; */ 2333 if (debug_enabled(DBG_PIO)) 2334 printk("\n"); 2335 } 2336#endif /* DC395x_LASTPIO */ 2337 2338#if 0 2339 /* 2340 * KG: This was in DATAOUT. Does it also belong here? 2341 * Nobody seems to know what counter and fifo_cnt count exactly ... 2342 */ 2343 if (!(scsi_status & SCSIXFERDONE)) { 2344 /* 2345 * when data transfer from DMA FIFO to SCSI FIFO 2346 * if there was some data left in SCSI FIFO 2347 */ 2348 d_left_counter = 2349 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2350 0x1F); 2351 if (srb->dcb->sync_period & WIDE_SYNC) 2352 d_left_counter <<= 1; 2353 /* 2354 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2355 * so need to *= 2 2356 * KG: Seems to be correct ... 2357 */ 2358 } 2359#endif 2360 /* KG: This should not be needed any more! */ 2361 if (d_left_counter == 0 2362 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2363#if 0 2364 int ctr = 6000000; 2365 u8 TempDMAstatus; 2366 do { 2367 TempDMAstatus = 2368 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2369 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2370 if (!ctr) 2371 dprintkl(KERN_ERR, 2372 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2373 srb->total_xfer_length = 0; 2374#endif 2375 srb->total_xfer_length = d_left_counter; 2376 } else { /* phase changed */ 2377 /* 2378 * parsing the case: 2379 * when a transfer not yet complete 2380 * but be disconnected by target 2381 * if transfer not yet complete 2382 * there were some data residue in SCSI FIFO or 2383 * SCSI transfer counter not empty 2384 */ 2385 sg_update_list(srb, d_left_counter); 2386 } 2387 } 2388 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2389 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2390 cleanup_after_transfer(acb, srb); 2391 } 2392} 2393 2394 2395static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2396 u16 *pscsi_status) 2397{ 2398 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n", 2399 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2400 data_io_transfer(acb, srb, XFERDATAIN); 2401} 2402 2403 2404static void data_io_transfer(struct AdapterCtlBlk *acb, 2405 struct ScsiReqBlk *srb, u16 io_dir) 2406{ 2407 struct DeviceCtlBlk *dcb = srb->dcb; 2408 u8 bval; 2409 dprintkdbg(DBG_0, 2410 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2411 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun, 2412 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2413 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2414 if (srb == acb->tmp_srb) 2415 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2416 if (srb->sg_index >= srb->sg_count) { 2417 /* can't happen? out of bounds error */ 2418 return; 2419 } 2420 2421 if (srb->total_xfer_length > DC395x_LASTPIO) { 2422 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2423 /* 2424 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2425 * Maybe, even ABORTXFER would be appropriate 2426 */ 2427 if (dma_status & XFERPENDING) { 2428 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2429 "Expect trouble!\n"); 2430 dump_register_info(acb, dcb, srb); 2431 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2432 } 2433 /* clear_fifo(acb, "IO"); */ 2434 /* 2435 * load what physical address of Scatter/Gather list table 2436 * want to be transfer 2437 */ 2438 srb->state |= SRB_DATA_XFER; 2439 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2440 if (scsi_sg_count(srb->cmd)) { /* with S/G */ 2441 io_dir |= DMACMD_SG; 2442 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2443 srb->sg_bus_addr + 2444 sizeof(struct SGentry) * 2445 srb->sg_index); 2446 /* load how many bytes in the sg list table */ 2447 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2448 ((u32)(srb->sg_count - 2449 srb->sg_index) << 3)); 2450 } else { /* without S/G */ 2451 io_dir &= ~DMACMD_SG; 2452 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2453 srb->segment_x[0].address); 2454 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2455 srb->segment_x[0].length); 2456 } 2457 /* load total transfer length (24bits) max value 16Mbyte */ 2458 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2459 srb->total_xfer_length); 2460 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2461 if (io_dir & DMACMD_DIR) { /* read */ 2462 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2463 SCMD_DMA_IN); 2464 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2465 } else { 2466 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2467 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2468 SCMD_DMA_OUT); 2469 } 2470 2471 } 2472#if DC395x_LASTPIO 2473 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2474 /* 2475 * load what physical address of Scatter/Gather list table 2476 * want to be transfer 2477 */ 2478 srb->state |= SRB_DATA_XFER; 2479 /* load total transfer length (24bits) max value 16Mbyte */ 2480 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2481 srb->total_xfer_length); 2482 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2483 if (io_dir & DMACMD_DIR) { /* read */ 2484 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2485 SCMD_FIFO_IN); 2486 } else { /* write */ 2487 int ln = srb->total_xfer_length; 2488 size_t left_io = srb->total_xfer_length; 2489 2490 if (srb->dcb->sync_period & WIDE_SYNC) 2491 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2492 CFG2_WIDEFIFO); 2493 2494 while (left_io) { 2495 unsigned char *virt, *base = NULL; 2496 unsigned long flags = 0; 2497 size_t len = left_io; 2498 size_t offset = srb->request_length - left_io; 2499 2500 local_irq_save(flags); 2501 /* Again, max 4 bytes */ 2502 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2503 srb->sg_count, &offset, &len); 2504 virt = base + offset; 2505 2506 left_io -= len; 2507 2508 while (len--) { 2509 if (debug_enabled(DBG_PIO)) 2510 printk(" %02x", *virt); 2511 2512 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); 2513 2514 sg_subtract_one(srb); 2515 } 2516 2517 scsi_kunmap_atomic_sg(base); 2518 local_irq_restore(flags); 2519 } 2520 if (srb->dcb->sync_period & WIDE_SYNC) { 2521 if (ln % 2) { 2522 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2523 if (debug_enabled(DBG_PIO)) 2524 printk(" |00"); 2525 } 2526 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2527 } 2528 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2529 if (debug_enabled(DBG_PIO)) 2530 printk("\n"); 2531 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2532 SCMD_FIFO_OUT); 2533 } 2534 } 2535#endif /* DC395x_LASTPIO */ 2536 else { /* xfer pad */ 2537 u8 data = 0, data2 = 0; 2538 if (srb->sg_count) { 2539 srb->adapter_status = H_OVER_UNDER_RUN; 2540 srb->status |= OVER_RUN; 2541 } 2542 /* 2543 * KG: despite the fact that we are using 16 bits I/O ops 2544 * the SCSI FIFO is only 8 bits according to the docs 2545 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2546 */ 2547 if (dcb->sync_period & WIDE_SYNC) { 2548 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2549 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2550 CFG2_WIDEFIFO); 2551 if (io_dir & DMACMD_DIR) { 2552 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2553 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2554 } else { 2555 /* Danger, Robinson: If you find KGs 2556 * scattered over the wide disk, the driver 2557 * or chip is to blame :-( */ 2558 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2559 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2560 } 2561 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2562 } else { 2563 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2564 /* Danger, Robinson: If you find a collection of Ks on your disk 2565 * something broke :-( */ 2566 if (io_dir & DMACMD_DIR) 2567 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2568 else 2569 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2570 } 2571 srb->state |= SRB_XFERPAD; 2572 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2573 /* SCSI command */ 2574 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2575 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2576 } 2577} 2578 2579 2580static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2581 u16 *pscsi_status) 2582{ 2583 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n", 2584 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2585 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2586 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2587 srb->state = SRB_COMPLETED; 2588 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2589 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2590 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2591} 2592 2593 2594static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2595 u16 *pscsi_status) 2596{ 2597 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n", 2598 srb->cmd, srb->cmd->device->id, srb->cmd->device->lun); 2599 srb->state = SRB_STATUS; 2600 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2601 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2602} 2603 2604 2605/* Check if the message is complete */ 2606static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2607{ 2608 if (*msgbuf == EXTENDED_MESSAGE) { 2609 if (len < 2) 2610 return 0; 2611 if (len < msgbuf[1] + 2) 2612 return 0; 2613 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2614 if (len < 2) 2615 return 0; 2616 return 1; 2617} 2618 2619/* reject_msg */ 2620static inline void msgin_reject(struct AdapterCtlBlk *acb, 2621 struct ScsiReqBlk *srb) 2622{ 2623 srb->msgout_buf[0] = MESSAGE_REJECT; 2624 srb->msg_count = 1; 2625 DC395x_ENABLE_MSGOUT; 2626 srb->state &= ~SRB_MSGIN; 2627 srb->state |= SRB_MSGOUT; 2628 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2629 srb->msgin_buf[0], 2630 srb->dcb->target_id, srb->dcb->target_lun); 2631} 2632 2633 2634static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2635 struct DeviceCtlBlk *dcb, u8 tag) 2636{ 2637 struct ScsiReqBlk *srb = NULL; 2638 struct ScsiReqBlk *i; 2639 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n", 2640 srb->cmd, tag, srb); 2641 2642 if (!(dcb->tag_mask & (1 << tag))) 2643 dprintkl(KERN_DEBUG, 2644 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2645 dcb->tag_mask, tag); 2646 2647 if (list_empty(&dcb->srb_going_list)) 2648 goto mingx0; 2649 list_for_each_entry(i, &dcb->srb_going_list, list) { 2650 if (i->tag_number == tag) { 2651 srb = i; 2652 break; 2653 } 2654 } 2655 if (!srb) 2656 goto mingx0; 2657 2658 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n", 2659 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun); 2660 if (dcb->flag & ABORT_DEV_) { 2661 /*srb->state = SRB_ABORT_SENT; */ 2662 enable_msgout_abort(acb, srb); 2663 } 2664 2665 if (!(srb->state & SRB_DISCONNECT)) 2666 goto mingx0; 2667 2668 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2669 srb->state |= dcb->active_srb->state; 2670 srb->state |= SRB_DATA_XFER; 2671 dcb->active_srb = srb; 2672 /* How can we make the DORS happy? */ 2673 return srb; 2674 2675 mingx0: 2676 srb = acb->tmp_srb; 2677 srb->state = SRB_UNEXPECT_RESEL; 2678 dcb->active_srb = srb; 2679 srb->msgout_buf[0] = MSG_ABORT_TAG; 2680 srb->msg_count = 1; 2681 DC395x_ENABLE_MSGOUT; 2682 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2683 return srb; 2684} 2685 2686 2687static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2688 struct DeviceCtlBlk *dcb) 2689{ 2690 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2691 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2692 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2693 set_xfer_rate(acb, dcb); 2694} 2695 2696 2697/* set async transfer mode */ 2698static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2699{ 2700 struct DeviceCtlBlk *dcb = srb->dcb; 2701 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2702 dcb->target_id, dcb->target_lun); 2703 2704 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2705 dcb->sync_mode |= SYNC_NEGO_DONE; 2706 /*dcb->sync_period &= 0; */ 2707 dcb->sync_offset = 0; 2708 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2709 srb->state &= ~SRB_DO_SYNC_NEGO; 2710 reprogram_regs(acb, dcb); 2711 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2712 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2713 build_wdtr(acb, dcb, srb); 2714 DC395x_ENABLE_MSGOUT; 2715 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2716 } 2717} 2718 2719 2720/* set sync transfer mode */ 2721static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2722{ 2723 struct DeviceCtlBlk *dcb = srb->dcb; 2724 u8 bval; 2725 int fact; 2726 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2727 "(%02i.%01i MHz) Offset %i\n", 2728 dcb->target_id, srb->msgin_buf[3] << 2, 2729 (250 / srb->msgin_buf[3]), 2730 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2731 srb->msgin_buf[4]); 2732 2733 if (srb->msgin_buf[4] > 15) 2734 srb->msgin_buf[4] = 15; 2735 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2736 dcb->sync_offset = 0; 2737 else if (dcb->sync_offset == 0) 2738 dcb->sync_offset = srb->msgin_buf[4]; 2739 if (srb->msgin_buf[4] > dcb->sync_offset) 2740 srb->msgin_buf[4] = dcb->sync_offset; 2741 else 2742 dcb->sync_offset = srb->msgin_buf[4]; 2743 bval = 0; 2744 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2745 || dcb->min_nego_period > 2746 clock_period[bval])) 2747 bval++; 2748 if (srb->msgin_buf[3] < clock_period[bval]) 2749 dprintkl(KERN_INFO, 2750 "msgin_set_sync: Increase sync nego period to %ins\n", 2751 clock_period[bval] << 2); 2752 srb->msgin_buf[3] = clock_period[bval]; 2753 dcb->sync_period &= 0xf0; 2754 dcb->sync_period |= ALT_SYNC | bval; 2755 dcb->min_nego_period = srb->msgin_buf[3]; 2756 2757 if (dcb->sync_period & WIDE_SYNC) 2758 fact = 500; 2759 else 2760 fact = 250; 2761 2762 dprintkl(KERN_INFO, 2763 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2764 dcb->target_id, (fact == 500) ? "Wide16" : "", 2765 dcb->min_nego_period << 2, dcb->sync_offset, 2766 (fact / dcb->min_nego_period), 2767 ((fact % dcb->min_nego_period) * 10 + 2768 dcb->min_nego_period / 2) / dcb->min_nego_period); 2769 2770 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2771 /* Reply with corrected SDTR Message */ 2772 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2773 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2774 2775 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2776 srb->msg_count = 5; 2777 DC395x_ENABLE_MSGOUT; 2778 dcb->sync_mode |= SYNC_NEGO_DONE; 2779 } else { 2780 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2781 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2782 build_wdtr(acb, dcb, srb); 2783 DC395x_ENABLE_MSGOUT; 2784 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2785 } 2786 } 2787 srb->state &= ~SRB_DO_SYNC_NEGO; 2788 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2789 2790 reprogram_regs(acb, dcb); 2791} 2792 2793 2794static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2795 struct ScsiReqBlk *srb) 2796{ 2797 struct DeviceCtlBlk *dcb = srb->dcb; 2798 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2799 2800 dcb->sync_period &= ~WIDE_SYNC; 2801 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2802 dcb->sync_mode |= WIDE_NEGO_DONE; 2803 srb->state &= ~SRB_DO_WIDE_NEGO; 2804 reprogram_regs(acb, dcb); 2805 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2806 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2807 build_sdtr(acb, dcb, srb); 2808 DC395x_ENABLE_MSGOUT; 2809 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2810 } 2811} 2812 2813static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2814{ 2815 struct DeviceCtlBlk *dcb = srb->dcb; 2816 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2817 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2818 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2819 2820 if (srb->msgin_buf[3] > wide) 2821 srb->msgin_buf[3] = wide; 2822 /* Completed */ 2823 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2824 dprintkl(KERN_DEBUG, 2825 "msgin_set_wide: Wide nego initiated <%02i>\n", 2826 dcb->target_id); 2827 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2828 srb->msg_count = 4; 2829 srb->state |= SRB_DO_WIDE_NEGO; 2830 DC395x_ENABLE_MSGOUT; 2831 } 2832 2833 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2834 if (srb->msgin_buf[3] > 0) 2835 dcb->sync_period |= WIDE_SYNC; 2836 else 2837 dcb->sync_period &= ~WIDE_SYNC; 2838 srb->state &= ~SRB_DO_WIDE_NEGO; 2839 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2840 dprintkdbg(DBG_1, 2841 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2842 (8 << srb->msgin_buf[3]), dcb->target_id); 2843 reprogram_regs(acb, dcb); 2844 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2845 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2846 build_sdtr(acb, dcb, srb); 2847 DC395x_ENABLE_MSGOUT; 2848 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2849 } 2850} 2851 2852 2853/* 2854 * extended message codes: 2855 * 2856 * code description 2857 * 2858 * 02h Reserved 2859 * 00h MODIFY DATA POINTER 2860 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2861 * 03h WIDE DATA TRANSFER REQUEST 2862 * 04h - 7Fh Reserved 2863 * 80h - FFh Vendor specific 2864 */ 2865static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2866 u16 *pscsi_status) 2867{ 2868 struct DeviceCtlBlk *dcb = acb->active_dcb; 2869 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd); 2870 2871 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2872 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2873 /* Now eval the msg */ 2874 switch (srb->msgin_buf[0]) { 2875 case DISCONNECT: 2876 srb->state = SRB_DISCONNECT; 2877 break; 2878 2879 case SIMPLE_QUEUE_TAG: 2880 case HEAD_OF_QUEUE_TAG: 2881 case ORDERED_QUEUE_TAG: 2882 srb = 2883 msgin_qtag(acb, dcb, 2884 srb->msgin_buf[1]); 2885 break; 2886 2887 case MESSAGE_REJECT: 2888 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2889 DO_CLRATN | DO_DATALATCH); 2890 /* A sync nego message was rejected ! */ 2891 if (srb->state & SRB_DO_SYNC_NEGO) { 2892 msgin_set_async(acb, srb); 2893 break; 2894 } 2895 /* A wide nego message was rejected ! */ 2896 if (srb->state & SRB_DO_WIDE_NEGO) { 2897 msgin_set_nowide(acb, srb); 2898 break; 2899 } 2900 enable_msgout_abort(acb, srb); 2901 /*srb->state |= SRB_ABORT_SENT */ 2902 break; 2903 2904 case EXTENDED_MESSAGE: 2905 /* SDTR */ 2906 if (srb->msgin_buf[1] == 3 2907 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2908 msgin_set_sync(acb, srb); 2909 break; 2910 } 2911 /* WDTR */ 2912 if (srb->msgin_buf[1] == 2 2913 && srb->msgin_buf[2] == EXTENDED_WDTR 2914 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2915 msgin_set_wide(acb, srb); 2916 break; 2917 } 2918 msgin_reject(acb, srb); 2919 break; 2920 2921 case MSG_IGNOREWIDE: 2922 /* Discard wide residual */ 2923 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2924 break; 2925 2926 case COMMAND_COMPLETE: 2927 /* nothing has to be done */ 2928 break; 2929 2930 case SAVE_POINTERS: 2931 /* 2932 * SAVE POINTER may be ignored as we have the struct 2933 * ScsiReqBlk* associated with the scsi command. 2934 */ 2935 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2936 "SAVE POINTER rem=%i Ignore\n", 2937 srb->cmd, srb->total_xfer_length); 2938 break; 2939 2940 case RESTORE_POINTERS: 2941 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2942 break; 2943 2944 case ABORT: 2945 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2946 "<%02i-%i> ABORT msg\n", 2947 srb->cmd, dcb->target_id, 2948 dcb->target_lun); 2949 dcb->flag |= ABORT_DEV_; 2950 enable_msgout_abort(acb, srb); 2951 break; 2952 2953 default: 2954 /* reject unknown messages */ 2955 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2956 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2957 srb->msg_count = 1; 2958 srb->msgout_buf[0] = dcb->identify_msg; 2959 DC395x_ENABLE_MSGOUT; 2960 srb->state |= SRB_MSGOUT; 2961 /*break; */ 2962 } 2963 msgin_reject(acb, srb); 2964 } 2965 2966 /* Clear counter and MsgIn state */ 2967 srb->state &= ~SRB_MSGIN; 2968 acb->msg_len = 0; 2969 } 2970 *pscsi_status = PH_BUS_FREE; 2971 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2972 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2973} 2974 2975 2976static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2977 u16 *pscsi_status) 2978{ 2979 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd); 2980 clear_fifo(acb, "msgin_phase1"); 2981 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2982 if (!(srb->state & SRB_MSGIN)) { 2983 srb->state &= ~SRB_DISCONNECT; 2984 srb->state |= SRB_MSGIN; 2985 } 2986 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2987 /* SCSI command */ 2988 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2989} 2990 2991 2992static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2993 u16 *pscsi_status) 2994{ 2995} 2996 2997 2998static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2999 u16 *pscsi_status) 3000{ 3001} 3002 3003 3004static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3005{ 3006 struct DeviceCtlBlk *i; 3007 3008 /* set all lun device's period, offset */ 3009 if (dcb->identify_msg & 0x07) 3010 return; 3011 3012 if (acb->scan_devices) { 3013 current_sync_offset = dcb->sync_offset; 3014 return; 3015 } 3016 3017 list_for_each_entry(i, &acb->dcb_list, list) 3018 if (i->target_id == dcb->target_id) { 3019 i->sync_period = dcb->sync_period; 3020 i->sync_offset = dcb->sync_offset; 3021 i->sync_mode = dcb->sync_mode; 3022 i->min_nego_period = dcb->min_nego_period; 3023 } 3024} 3025 3026 3027static void disconnect(struct AdapterCtlBlk *acb) 3028{ 3029 struct DeviceCtlBlk *dcb = acb->active_dcb; 3030 struct ScsiReqBlk *srb; 3031 3032 if (!dcb) { 3033 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3034 udelay(500); 3035 /* Suspend queue for a while */ 3036 acb->last_reset = 3037 jiffies + HZ / 2 + 3038 HZ * acb->eeprom.delay_time; 3039 clear_fifo(acb, "disconnectEx"); 3040 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3041 return; 3042 } 3043 srb = dcb->active_srb; 3044 acb->active_dcb = NULL; 3045 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd); 3046 3047 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3048 clear_fifo(acb, "disconnect"); 3049 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3050 if (srb->state & SRB_UNEXPECT_RESEL) { 3051 dprintkl(KERN_ERR, 3052 "disconnect: Unexpected reselection <%02i-%i>\n", 3053 dcb->target_id, dcb->target_lun); 3054 srb->state = 0; 3055 waiting_process_next(acb); 3056 } else if (srb->state & SRB_ABORT_SENT) { 3057 dcb->flag &= ~ABORT_DEV_; 3058 acb->last_reset = jiffies + HZ / 2 + 1; 3059 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3060 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3061 waiting_process_next(acb); 3062 } else { 3063 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3064 || !(srb-> 3065 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3066 /* 3067 * Selection time out 3068 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3069 */ 3070 /* Unexp. Disc / Sel Timeout */ 3071 if (srb->state != SRB_START_ 3072 && srb->state != SRB_MSGOUT) { 3073 srb->state = SRB_READY; 3074 dprintkl(KERN_DEBUG, 3075 "disconnect: (0x%p) Unexpected\n", 3076 srb->cmd); 3077 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3078 goto disc1; 3079 } else { 3080 /* Normal selection timeout */ 3081 dprintkdbg(DBG_KG, "disconnect: (0x%p) " 3082 "<%02i-%i> SelTO\n", srb->cmd, 3083 dcb->target_id, dcb->target_lun); 3084 if (srb->retry_count++ > DC395x_MAX_RETRIES 3085 || acb->scan_devices) { 3086 srb->target_status = 3087 SCSI_STAT_SEL_TIMEOUT; 3088 goto disc1; 3089 } 3090 free_tag(dcb, srb); 3091 srb_going_to_waiting_move(dcb, srb); 3092 dprintkdbg(DBG_KG, 3093 "disconnect: (0x%p) Retry\n", 3094 srb->cmd); 3095 waiting_set_timer(acb, HZ / 20); 3096 } 3097 } else if (srb->state & SRB_DISCONNECT) { 3098 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3099 /* 3100 * SRB_DISCONNECT (This is what we expect!) 3101 */ 3102 if (bval & 0x40) { 3103 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3104 " 0x%02x: ACK set! Other controllers?\n", 3105 bval); 3106 /* It could come from another initiator, therefore don't do much ! */ 3107 } else 3108 waiting_process_next(acb); 3109 } else if (srb->state & SRB_COMPLETED) { 3110 disc1: 3111 /* 3112 ** SRB_COMPLETED 3113 */ 3114 free_tag(dcb, srb); 3115 dcb->active_srb = NULL; 3116 srb->state = SRB_FREE; 3117 srb_done(acb, dcb, srb); 3118 } 3119 } 3120} 3121 3122 3123static void reselect(struct AdapterCtlBlk *acb) 3124{ 3125 struct DeviceCtlBlk *dcb = acb->active_dcb; 3126 struct ScsiReqBlk *srb = NULL; 3127 u16 rsel_tar_lun_id; 3128 u8 id, lun; 3129 u8 arblostflag = 0; 3130 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3131 3132 clear_fifo(acb, "reselect"); 3133 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3134 /* Read Reselected Target ID and LUN */ 3135 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3136 if (dcb) { /* Arbitration lost but Reselection win */ 3137 srb = dcb->active_srb; 3138 if (!srb) { 3139 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3140 "but active_srb == NULL\n"); 3141 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3142 return; 3143 } 3144 /* Why the if ? */ 3145 if (!acb->scan_devices) { 3146 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> " 3147 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3148 srb->cmd, dcb->target_id, 3149 dcb->target_lun, rsel_tar_lun_id, 3150 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3151 arblostflag = 1; 3152 /*srb->state |= SRB_DISCONNECT; */ 3153 3154 srb->state = SRB_READY; 3155 free_tag(dcb, srb); 3156 srb_going_to_waiting_move(dcb, srb); 3157 waiting_set_timer(acb, HZ / 20); 3158 3159 /* return; */ 3160 } 3161 } 3162 /* Read Reselected Target Id and LUN */ 3163 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3164 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3165 "Got %i!\n", rsel_tar_lun_id); 3166 id = rsel_tar_lun_id & 0xff; 3167 lun = (rsel_tar_lun_id >> 8) & 7; 3168 dcb = find_dcb(acb, id, lun); 3169 if (!dcb) { 3170 dprintkl(KERN_ERR, "reselect: From non existent device " 3171 "<%02i-%i>\n", id, lun); 3172 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3173 return; 3174 } 3175 acb->active_dcb = dcb; 3176 3177 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3178 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3179 "disconnection? <%02i-%i>\n", 3180 dcb->target_id, dcb->target_lun); 3181 3182 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3183 srb = acb->tmp_srb; 3184 dcb->active_srb = srb; 3185 } else { 3186 /* There can be only one! */ 3187 srb = dcb->active_srb; 3188 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3189 /* 3190 * abort command 3191 */ 3192 dprintkl(KERN_DEBUG, 3193 "reselect: w/o disconnected cmds <%02i-%i>\n", 3194 dcb->target_id, dcb->target_lun); 3195 srb = acb->tmp_srb; 3196 srb->state = SRB_UNEXPECT_RESEL; 3197 dcb->active_srb = srb; 3198 enable_msgout_abort(acb, srb); 3199 } else { 3200 if (dcb->flag & ABORT_DEV_) { 3201 /*srb->state = SRB_ABORT_SENT; */ 3202 enable_msgout_abort(acb, srb); 3203 } else 3204 srb->state = SRB_DATA_XFER; 3205 3206 } 3207 } 3208 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3209 3210 /* Program HA ID, target ID, period and offset */ 3211 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3212 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3213 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3214 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3215 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3216 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3217 /* SCSI command */ 3218 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3219} 3220 3221 3222static inline u8 tagq_blacklist(char *name) 3223{ 3224#ifndef DC395x_NO_TAGQ 3225#if 0 3226 u8 i; 3227 for (i = 0; i < BADDEVCNT; i++) 3228 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3229 return 1; 3230#endif 3231 return 0; 3232#else 3233 return 1; 3234#endif 3235} 3236 3237 3238static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3239{ 3240 /* Check for SCSI format (ANSI and Response data format) */ 3241 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3242 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3243 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3244 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3245 /* ((dcb->dev_type == TYPE_DISK) 3246 || (dcb->dev_type == TYPE_MOD)) && */ 3247 !tagq_blacklist(((char *)ptr) + 8)) { 3248 if (dcb->max_command == 1) 3249 dcb->max_command = 3250 dcb->acb->tag_max_num; 3251 dcb->sync_mode |= EN_TAG_QUEUEING; 3252 /*dcb->tag_mask = 0; */ 3253 } else 3254 dcb->max_command = 1; 3255 } 3256} 3257 3258 3259static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3260 struct ScsiInqData *ptr) 3261{ 3262 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3263 dcb->dev_type = bval1; 3264 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3265 disc_tagq_set(dcb, ptr); 3266} 3267 3268 3269/* unmap mapped pci regions from SRB */ 3270static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3271{ 3272 struct scsi_cmnd *cmd = srb->cmd; 3273 enum dma_data_direction dir = cmd->sc_data_direction; 3274 3275 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) { 3276 /* unmap DC395x SG list */ 3277 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3278 srb->sg_bus_addr, SEGMENTX_LEN); 3279 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3280 SEGMENTX_LEN, 3281 PCI_DMA_TODEVICE); 3282 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3283 scsi_sg_count(cmd), scsi_bufflen(cmd)); 3284 /* unmap the sg segments */ 3285 scsi_dma_unmap(cmd); 3286 } 3287} 3288 3289 3290/* unmap mapped pci sense buffer from SRB */ 3291static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3292 struct ScsiReqBlk *srb) 3293{ 3294 if (!(srb->flag & AUTO_REQSENSE)) 3295 return; 3296 /* Unmap sense buffer */ 3297 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3298 srb->segment_x[0].address); 3299 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3300 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3301 /* Restore SG stuff */ 3302 srb->total_xfer_length = srb->xferred; 3303 srb->segment_x[0].address = 3304 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3305 srb->segment_x[0].length = 3306 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3307} 3308 3309 3310/* 3311 * Complete execution of a SCSI command 3312 * Signal completion to the generic SCSI driver 3313 */ 3314static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3315 struct ScsiReqBlk *srb) 3316{ 3317 u8 tempcnt, status; 3318 struct scsi_cmnd *cmd = srb->cmd; 3319 enum dma_data_direction dir = cmd->sc_data_direction; 3320 int ckc_only = 1; 3321 3322 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd, 3323 srb->cmd->device->id, srb->cmd->device->lun); 3324 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", 3325 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, 3326 scsi_sgtalbe(cmd)); 3327 status = srb->target_status; 3328 if (srb->flag & AUTO_REQSENSE) { 3329 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3330 pci_unmap_srb_sense(acb, srb); 3331 /* 3332 ** target status.......................... 3333 */ 3334 srb->flag &= ~AUTO_REQSENSE; 3335 srb->adapter_status = 0; 3336 srb->target_status = CHECK_CONDITION << 1; 3337 if (debug_enabled(DBG_1)) { 3338 switch (cmd->sense_buffer[2] & 0x0f) { 3339 case NOT_READY: 3340 dprintkl(KERN_DEBUG, 3341 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3342 cmd->cmnd[0], dcb->target_id, 3343 dcb->target_lun, status, acb->scan_devices); 3344 break; 3345 case UNIT_ATTENTION: 3346 dprintkl(KERN_DEBUG, 3347 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3348 cmd->cmnd[0], dcb->target_id, 3349 dcb->target_lun, status, acb->scan_devices); 3350 break; 3351 case ILLEGAL_REQUEST: 3352 dprintkl(KERN_DEBUG, 3353 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3354 cmd->cmnd[0], dcb->target_id, 3355 dcb->target_lun, status, acb->scan_devices); 3356 break; 3357 case MEDIUM_ERROR: 3358 dprintkl(KERN_DEBUG, 3359 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3360 cmd->cmnd[0], dcb->target_id, 3361 dcb->target_lun, status, acb->scan_devices); 3362 break; 3363 case HARDWARE_ERROR: 3364 dprintkl(KERN_DEBUG, 3365 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3366 cmd->cmnd[0], dcb->target_id, 3367 dcb->target_lun, status, acb->scan_devices); 3368 break; 3369 } 3370 if (cmd->sense_buffer[7] >= 6) 3371 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3372 "(0x%08x 0x%08x)\n", 3373 cmd->sense_buffer[2], cmd->sense_buffer[12], 3374 cmd->sense_buffer[13], 3375 *((unsigned int *)(cmd->sense_buffer + 3)), 3376 *((unsigned int *)(cmd->sense_buffer + 8))); 3377 else 3378 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3379 cmd->sense_buffer[2], 3380 *((unsigned int *)(cmd->sense_buffer + 3))); 3381 } 3382 3383 if (status == (CHECK_CONDITION << 1)) { 3384 cmd->result = DID_BAD_TARGET << 16; 3385 goto ckc_e; 3386 } 3387 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3388 3389 if (srb->total_xfer_length 3390 && srb->total_xfer_length >= cmd->underflow) 3391 cmd->result = 3392 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3393 srb->end_message, CHECK_CONDITION); 3394 /*SET_RES_DID(cmd->result,DID_OK) */ 3395 else 3396 cmd->result = 3397 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3398 srb->end_message, CHECK_CONDITION); 3399 3400 goto ckc_e; 3401 } 3402 3403/*************************************************************/ 3404 if (status) { 3405 /* 3406 * target status.......................... 3407 */ 3408 if (status_byte(status) == CHECK_CONDITION) { 3409 request_sense(acb, dcb, srb); 3410 return; 3411 } else if (status_byte(status) == QUEUE_FULL) { 3412 tempcnt = (u8)list_size(&dcb->srb_going_list); 3413 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3414 dcb->target_id, dcb->target_lun, tempcnt); 3415 if (tempcnt > 1) 3416 tempcnt--; 3417 dcb->max_command = tempcnt; 3418 free_tag(dcb, srb); 3419 srb_going_to_waiting_move(dcb, srb); 3420 waiting_set_timer(acb, HZ / 20); 3421 srb->adapter_status = 0; 3422 srb->target_status = 0; 3423 return; 3424 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3425 srb->adapter_status = H_SEL_TIMEOUT; 3426 srb->target_status = 0; 3427 cmd->result = DID_NO_CONNECT << 16; 3428 } else { 3429 srb->adapter_status = 0; 3430 SET_RES_DID(cmd->result, DID_ERROR); 3431 SET_RES_MSG(cmd->result, srb->end_message); 3432 SET_RES_TARGET(cmd->result, status); 3433 3434 } 3435 } else { 3436 /* 3437 ** process initiator status.......................... 3438 */ 3439 status = srb->adapter_status; 3440 if (status & H_OVER_UNDER_RUN) { 3441 srb->target_status = 0; 3442 SET_RES_DID(cmd->result, DID_OK); 3443 SET_RES_MSG(cmd->result, srb->end_message); 3444 } else if (srb->status & PARITY_ERROR) { 3445 SET_RES_DID(cmd->result, DID_PARITY); 3446 SET_RES_MSG(cmd->result, srb->end_message); 3447 } else { /* No error */ 3448 3449 srb->adapter_status = 0; 3450 srb->target_status = 0; 3451 SET_RES_DID(cmd->result, DID_OK); 3452 } 3453 } 3454 3455 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd)) 3456 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd), 3457 scsi_sg_count(cmd), dir); 3458 3459 ckc_only = 0; 3460/* Check Error Conditions */ 3461 ckc_e: 3462 3463 if (cmd->cmnd[0] == INQUIRY) { 3464 unsigned char *base = NULL; 3465 struct ScsiInqData *ptr; 3466 unsigned long flags = 0; 3467 struct scatterlist* sg = scsi_sglist(cmd); 3468 size_t offset = 0, len = sizeof(struct ScsiInqData); 3469 3470 local_irq_save(flags); 3471 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); 3472 ptr = (struct ScsiInqData *)(base + offset); 3473 3474 if (!ckc_only && (cmd->result & RES_DID) == 0 3475 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 3476 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3477 dcb->inquiry7 = ptr->Flags; 3478 3479 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3480 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3481 if ((cmd->result == (DID_OK << 16) 3482 || status_byte(cmd->result) & 3483 CHECK_CONDITION)) { 3484 if (!dcb->init_tcq_flag) { 3485 add_dev(acb, dcb, ptr); 3486 dcb->init_tcq_flag = 1; 3487 } 3488 } 3489 3490 scsi_kunmap_atomic_sg(base); 3491 local_irq_restore(flags); 3492 } 3493 3494 /* Here is the info for Doug Gilbert's sg3 ... */ 3495 scsi_set_resid(cmd, srb->total_xfer_length); 3496 /* This may be interpreted by sb. or not ... */ 3497 cmd->SCp.this_residual = srb->total_xfer_length; 3498 cmd->SCp.buffers_residual = 0; 3499 if (debug_enabled(DBG_KG)) { 3500 if (srb->total_xfer_length) 3501 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> " 3502 "cmnd=0x%02x Missed %i bytes\n", 3503 cmd, cmd->device->id, cmd->device->lun, 3504 cmd->cmnd[0], srb->total_xfer_length); 3505 } 3506 3507 srb_going_remove(dcb, srb); 3508 /* Add to free list */ 3509 if (srb == acb->tmp_srb) 3510 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3511 else { 3512 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n", 3513 cmd, cmd->result); 3514 srb_free_insert(acb, srb); 3515 } 3516 pci_unmap_srb(acb, srb); 3517 3518 cmd->scsi_done(cmd); 3519 waiting_process_next(acb); 3520} 3521 3522 3523/* abort all cmds in our queues */ 3524static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3525 struct scsi_cmnd *cmd, u8 force) 3526{ 3527 struct DeviceCtlBlk *dcb; 3528 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3529 3530 list_for_each_entry(dcb, &acb->dcb_list, list) { 3531 struct ScsiReqBlk *srb; 3532 struct ScsiReqBlk *tmp; 3533 struct scsi_cmnd *p; 3534 3535 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3536 enum dma_data_direction dir; 3537 int result; 3538 3539 p = srb->cmd; 3540 dir = p->sc_data_direction; 3541 result = MK_RES(0, did_flag, 0, 0); 3542 printk("G:%p(%02i-%i) ", p, 3543 p->device->id, p->device->lun); 3544 srb_going_remove(dcb, srb); 3545 free_tag(dcb, srb); 3546 srb_free_insert(acb, srb); 3547 p->result = result; 3548 pci_unmap_srb_sense(acb, srb); 3549 pci_unmap_srb(acb, srb); 3550 if (force) { 3551 /* For new EH, we normally don't need to give commands back, 3552 * as they all complete or all time out */ 3553 p->scsi_done(p); 3554 } 3555 } 3556 if (!list_empty(&dcb->srb_going_list)) 3557 dprintkl(KERN_DEBUG, 3558 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3559 dcb->target_id, dcb->target_lun); 3560 if (dcb->tag_mask) 3561 dprintkl(KERN_DEBUG, 3562 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3563 dcb->target_id, dcb->target_lun, 3564 dcb->tag_mask); 3565 3566 /* Waiting queue */ 3567 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3568 int result; 3569 p = srb->cmd; 3570 3571 result = MK_RES(0, did_flag, 0, 0); 3572 printk("W:%p<%02i-%i>", p, p->device->id, 3573 p->device->lun); 3574 srb_waiting_remove(dcb, srb); 3575 srb_free_insert(acb, srb); 3576 p->result = result; 3577 pci_unmap_srb_sense(acb, srb); 3578 pci_unmap_srb(acb, srb); 3579 if (force) { 3580 /* For new EH, we normally don't need to give commands back, 3581 * as they all complete or all time out */ 3582 cmd->scsi_done(cmd); 3583 } 3584 } 3585 if (!list_empty(&dcb->srb_waiting_list)) 3586 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3587 list_size(&dcb->srb_waiting_list), dcb->target_id, 3588 dcb->target_lun); 3589 dcb->flag &= ~ABORT_DEV_; 3590 } 3591 printk("\n"); 3592} 3593 3594 3595static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3596{ 3597 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3598 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3599 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3600 3601 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3602 /* nothing */; 3603} 3604 3605 3606static void set_basic_config(struct AdapterCtlBlk *acb) 3607{ 3608 u8 bval; 3609 u16 wval; 3610 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3611 if (acb->config & HCC_PARITY) 3612 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3613 else 3614 bval = PHASELATCH | INITIATOR | BLOCKRST; 3615 3616 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3617 3618 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3619 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3620 /* program Host ID */ 3621 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3622 /* set ansynchronous transfer */ 3623 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3624 /* Turn LED control off */ 3625 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3626 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3627 /* DMA config */ 3628 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3629 wval |= 3630 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3631 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3632 /* Clear pending interrupt status */ 3633 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3634 /* Enable SCSI interrupt */ 3635 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3636 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3637 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3638 ); 3639} 3640 3641 3642static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3643{ 3644 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3645 /* delay half a second */ 3646 if (timer_pending(&acb->waiting_timer)) 3647 del_timer(&acb->waiting_timer); 3648 3649 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3650 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3651 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3652 udelay(500); 3653 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3654 acb->last_reset = 3655 jiffies + 5 * HZ / 2 + 3656 HZ * acb->eeprom.delay_time; 3657 3658 clear_fifo(acb, "scsi_reset_detect"); 3659 set_basic_config(acb); 3660 /*1.25 */ 3661 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3662 3663 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3664 acb->acb_flag |= RESET_DONE; 3665 } else { 3666 acb->acb_flag |= RESET_DETECT; 3667 reset_dev_param(acb); 3668 doing_srb_done(acb, DID_RESET, NULL, 1); 3669 /*DC395x_RecoverSRB( acb ); */ 3670 acb->active_dcb = NULL; 3671 acb->acb_flag = 0; 3672 waiting_process_next(acb); 3673 } 3674} 3675 3676 3677static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3678 struct ScsiReqBlk *srb) 3679{ 3680 struct scsi_cmnd *cmd = srb->cmd; 3681 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n", 3682 cmd, cmd->device->id, cmd->device->lun); 3683 3684 srb->flag |= AUTO_REQSENSE; 3685 srb->adapter_status = 0; 3686 srb->target_status = 0; 3687 3688 /* KG: Can this prevent crap sense data ? */ 3689 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 3690 3691 /* Save some data */ 3692 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3693 srb->segment_x[0].address; 3694 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3695 srb->segment_x[0].length; 3696 srb->xferred = srb->total_xfer_length; 3697 /* srb->segment_x : a one entry of S/G list table */ 3698 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE; 3699 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; 3700 /* Map sense buffer */ 3701 srb->segment_x[0].address = 3702 pci_map_single(acb->dev, cmd->sense_buffer, 3703 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); 3704 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3705 cmd->sense_buffer, srb->segment_x[0].address, 3706 SCSI_SENSE_BUFFERSIZE); 3707 srb->sg_count = 1; 3708 srb->sg_index = 0; 3709 3710 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3711 dprintkl(KERN_DEBUG, 3712 "request_sense: (0x%p) failed <%02i-%i>\n", 3713 srb->cmd, dcb->target_id, dcb->target_lun); 3714 srb_going_to_waiting_move(dcb, srb); 3715 waiting_set_timer(acb, HZ / 100); 3716 } 3717} 3718 3719 3720/** 3721 * device_alloc - Allocate a new device instance. This create the 3722 * devices instance and sets up all the data items. The adapter 3723 * instance is required to obtain confiuration information for this 3724 * device. This does *not* add this device to the adapters device 3725 * list. 3726 * 3727 * @acb: The adapter to obtain configuration information from. 3728 * @target: The target for the new device. 3729 * @lun: The lun for the new device. 3730 * 3731 * Return the new device if successful or NULL on failure. 3732 **/ 3733static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3734 u8 target, u8 lun) 3735{ 3736 struct NvRamType *eeprom = &acb->eeprom; 3737 u8 period_index = eeprom->target[target].period & 0x07; 3738 struct DeviceCtlBlk *dcb; 3739 3740 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3741 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3742 if (!dcb) 3743 return NULL; 3744 dcb->acb = NULL; 3745 INIT_LIST_HEAD(&dcb->srb_going_list); 3746 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3747 dcb->active_srb = NULL; 3748 dcb->tag_mask = 0; 3749 dcb->max_command = 1; 3750 dcb->target_id = target; 3751 dcb->target_lun = lun; 3752 dcb->dev_mode = eeprom->target[target].cfg0; 3753#ifndef DC395x_NO_DISCONNECT 3754 dcb->identify_msg = 3755 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3756#else 3757 dcb->identify_msg = IDENTIFY(0, lun); 3758#endif 3759 dcb->inquiry7 = 0; 3760 dcb->sync_mode = 0; 3761 dcb->min_nego_period = clock_period[period_index]; 3762 dcb->sync_period = 0; 3763 dcb->sync_offset = 0; 3764 dcb->flag = 0; 3765 3766#ifndef DC395x_NO_WIDE 3767 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3768 && (acb->config & HCC_WIDE_CARD)) 3769 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3770#endif 3771#ifndef DC395x_NO_SYNC 3772 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3773 if (!(lun) || current_sync_offset) 3774 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3775#endif 3776 if (dcb->target_lun != 0) { 3777 /* Copy settings */ 3778 struct DeviceCtlBlk *p; 3779 list_for_each_entry(p, &acb->dcb_list, list) 3780 if (p->target_id == dcb->target_id) 3781 break; 3782 dprintkdbg(DBG_1, 3783 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3784 dcb->target_id, dcb->target_lun, 3785 p->target_id, p->target_lun); 3786 dcb->sync_mode = p->sync_mode; 3787 dcb->sync_period = p->sync_period; 3788 dcb->min_nego_period = p->min_nego_period; 3789 dcb->sync_offset = p->sync_offset; 3790 dcb->inquiry7 = p->inquiry7; 3791 } 3792 return dcb; 3793} 3794 3795 3796/** 3797 * adapter_add_device - Adds the device instance to the adaptor instance. 3798 * 3799 * @acb: The adapter device to be updated 3800 * @dcb: A newly created and initialised device instance to add. 3801 **/ 3802static void adapter_add_device(struct AdapterCtlBlk *acb, 3803 struct DeviceCtlBlk *dcb) 3804{ 3805 /* backpointer to adapter */ 3806 dcb->acb = acb; 3807 3808 /* set run_robin to this device if it is currently empty */ 3809 if (list_empty(&acb->dcb_list)) 3810 acb->dcb_run_robin = dcb; 3811 3812 /* add device to list */ 3813 list_add_tail(&dcb->list, &acb->dcb_list); 3814 3815 /* update device maps */ 3816 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3817 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3818} 3819 3820 3821/** 3822 * adapter_remove_device - Removes the device instance from the adaptor 3823 * instance. The device instance is not check in any way or freed by this. 3824 * The caller is expected to take care of that. This will simply remove the 3825 * device from the adapters data strcutures. 3826 * 3827 * @acb: The adapter device to be updated 3828 * @dcb: A device that has previously been added to the adapter. 3829 **/ 3830static void adapter_remove_device(struct AdapterCtlBlk *acb, 3831 struct DeviceCtlBlk *dcb) 3832{ 3833 struct DeviceCtlBlk *i; 3834 struct DeviceCtlBlk *tmp; 3835 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3836 dcb->target_id, dcb->target_lun); 3837 3838 /* fix up any pointers to this device that we have in the adapter */ 3839 if (acb->active_dcb == dcb) 3840 acb->active_dcb = NULL; 3841 if (acb->dcb_run_robin == dcb) 3842 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3843 3844 /* unlink from list */ 3845 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3846 if (dcb == i) { 3847 list_del(&i->list); 3848 break; 3849 } 3850 3851 /* clear map and children */ 3852 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3853 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3854 dcb->acb = NULL; 3855} 3856 3857 3858/** 3859 * adapter_remove_and_free_device - Removes a single device from the adapter 3860 * and then frees the device information. 3861 * 3862 * @acb: The adapter device to be updated 3863 * @dcb: A device that has previously been added to the adapter. 3864 */ 3865static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3866 struct DeviceCtlBlk *dcb) 3867{ 3868 if (list_size(&dcb->srb_going_list) > 1) { 3869 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3870 "Won't remove because of %i active requests.\n", 3871 dcb->target_id, dcb->target_lun, 3872 list_size(&dcb->srb_going_list)); 3873 return; 3874 } 3875 adapter_remove_device(acb, dcb); 3876 kfree(dcb); 3877} 3878 3879 3880/** 3881 * adapter_remove_and_free_all_devices - Removes and frees all of the 3882 * devices associated with the specified adapter. 3883 * 3884 * @acb: The adapter from which all devices should be removed. 3885 **/ 3886static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3887{ 3888 struct DeviceCtlBlk *dcb; 3889 struct DeviceCtlBlk *tmp; 3890 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3891 list_size(&acb->dcb_list)); 3892 3893 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3894 adapter_remove_and_free_device(acb, dcb); 3895} 3896 3897 3898/** 3899 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3900 * scsi device that we need to deal with. We allocate a new device and then 3901 * insert that device into the adapters device list. 3902 * 3903 * @scsi_device: The new scsi device that we need to handle. 3904 **/ 3905static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3906{ 3907 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3908 struct DeviceCtlBlk *dcb; 3909 3910 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3911 if (!dcb) 3912 return -ENOMEM; 3913 adapter_add_device(acb, dcb); 3914 3915 return 0; 3916} 3917 3918 3919/** 3920 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3921 * device that is going away. 3922 * 3923 * @scsi_device: The new scsi device that we need to handle. 3924 **/ 3925static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3926{ 3927 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3928 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3929 if (dcb) 3930 adapter_remove_and_free_device(acb, dcb); 3931} 3932 3933 3934 3935 3936/** 3937 * trms1040_wait_30us: wait for 30 us 3938 * 3939 * Waits for 30us (using the chip by the looks of it..) 3940 * 3941 * @io_port: base I/O address 3942 **/ 3943static void trms1040_wait_30us(unsigned long io_port) 3944{ 3945 /* ScsiPortStallExecution(30); wait 30 us */ 3946 outb(5, io_port + TRM_S1040_GEN_TIMER); 3947 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3948 /* nothing */ ; 3949} 3950 3951 3952/** 3953 * trms1040_write_cmd - write the secified command and address to 3954 * chip 3955 * 3956 * @io_port: base I/O address 3957 * @cmd: SB + op code (command) to send 3958 * @addr: address to send 3959 **/ 3960static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3961{ 3962 int i; 3963 u8 send_data; 3964 3965 /* program SB + OP code */ 3966 for (i = 0; i < 3; i++, cmd <<= 1) { 3967 send_data = NVR_SELECT; 3968 if (cmd & 0x04) /* Start from bit 2 */ 3969 send_data |= NVR_BITOUT; 3970 3971 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3972 trms1040_wait_30us(io_port); 3973 outb((send_data | NVR_CLOCK), 3974 io_port + TRM_S1040_GEN_NVRAM); 3975 trms1040_wait_30us(io_port); 3976 } 3977 3978 /* send address */ 3979 for (i = 0; i < 7; i++, addr <<= 1) { 3980 send_data = NVR_SELECT; 3981 if (addr & 0x40) /* Start from bit 6 */ 3982 send_data |= NVR_BITOUT; 3983 3984 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3985 trms1040_wait_30us(io_port); 3986 outb((send_data | NVR_CLOCK), 3987 io_port + TRM_S1040_GEN_NVRAM); 3988 trms1040_wait_30us(io_port); 3989 } 3990 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3991 trms1040_wait_30us(io_port); 3992} 3993 3994 3995/** 3996 * trms1040_set_data - store a single byte in the eeprom 3997 * 3998 * Called from write all to write a single byte into the SSEEPROM 3999 * Which is done one bit at a time. 4000 * 4001 * @io_port: base I/O address 4002 * @addr: offset into EEPROM 4003 * @byte: bytes to write 4004 **/ 4005static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4006{ 4007 int i; 4008 u8 send_data; 4009 4010 /* Send write command & address */ 4011 trms1040_write_cmd(io_port, 0x05, addr); 4012 4013 /* Write data */ 4014 for (i = 0; i < 8; i++, byte <<= 1) { 4015 send_data = NVR_SELECT; 4016 if (byte & 0x80) /* Start from bit 7 */ 4017 send_data |= NVR_BITOUT; 4018 4019 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4020 trms1040_wait_30us(io_port); 4021 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4022 trms1040_wait_30us(io_port); 4023 } 4024 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4025 trms1040_wait_30us(io_port); 4026 4027 /* Disable chip select */ 4028 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4029 trms1040_wait_30us(io_port); 4030 4031 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4032 trms1040_wait_30us(io_port); 4033 4034 /* Wait for write ready */ 4035 while (1) { 4036 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4037 trms1040_wait_30us(io_port); 4038 4039 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4040 trms1040_wait_30us(io_port); 4041 4042 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4043 break; 4044 } 4045 4046 /* Disable chip select */ 4047 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4048} 4049 4050 4051/** 4052 * trms1040_write_all - write 128 bytes to the eeprom 4053 * 4054 * Write the supplied 128 bytes to the chips SEEPROM 4055 * 4056 * @eeprom: the data to write 4057 * @io_port: the base io port 4058 **/ 4059static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4060{ 4061 u8 *b_eeprom = (u8 *)eeprom; 4062 u8 addr; 4063 4064 /* Enable SEEPROM */ 4065 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4066 io_port + TRM_S1040_GEN_CONTROL); 4067 4068 /* write enable */ 4069 trms1040_write_cmd(io_port, 0x04, 0xFF); 4070 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4071 trms1040_wait_30us(io_port); 4072 4073 /* write */ 4074 for (addr = 0; addr < 128; addr++, b_eeprom++) 4075 trms1040_set_data(io_port, addr, *b_eeprom); 4076 4077 /* write disable */ 4078 trms1040_write_cmd(io_port, 0x04, 0x00); 4079 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4080 trms1040_wait_30us(io_port); 4081 4082 /* Disable SEEPROM */ 4083 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4084 io_port + TRM_S1040_GEN_CONTROL); 4085} 4086 4087 4088/** 4089 * trms1040_get_data - get a single byte from the eeprom 4090 * 4091 * Called from read all to read a single byte into the SSEEPROM 4092 * Which is done one bit at a time. 4093 * 4094 * @io_port: base I/O address 4095 * @addr: offset into SEEPROM 4096 * 4097 * Returns the byte read. 4098 **/ 4099static u8 trms1040_get_data(unsigned long io_port, u8 addr) 4100{ 4101 int i; 4102 u8 read_byte; 4103 u8 result = 0; 4104 4105 /* Send read command & address */ 4106 trms1040_write_cmd(io_port, 0x06, addr); 4107 4108 /* read data */ 4109 for (i = 0; i < 8; i++) { 4110 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4111 trms1040_wait_30us(io_port); 4112 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4113 4114 /* Get data bit while falling edge */ 4115 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4116 result <<= 1; 4117 if (read_byte & NVR_BITIN) 4118 result |= 1; 4119 4120 trms1040_wait_30us(io_port); 4121 } 4122 4123 /* Disable chip select */ 4124 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4125 return result; 4126} 4127 4128 4129/** 4130 * trms1040_read_all - read all bytes from the eeprom 4131 * 4132 * Read the 128 bytes from the SEEPROM. 4133 * 4134 * @eeprom: where to store the data 4135 * @io_port: the base io port 4136 **/ 4137static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4138{ 4139 u8 *b_eeprom = (u8 *)eeprom; 4140 u8 addr; 4141 4142 /* Enable SEEPROM */ 4143 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4144 io_port + TRM_S1040_GEN_CONTROL); 4145 4146 /* read details */ 4147 for (addr = 0; addr < 128; addr++, b_eeprom++) 4148 *b_eeprom = trms1040_get_data(io_port, addr); 4149 4150 /* Disable SEEPROM */ 4151 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4152 io_port + TRM_S1040_GEN_CONTROL); 4153} 4154 4155 4156 4157/** 4158 * check_eeprom - get and check contents of the eeprom 4159 * 4160 * Read seeprom 128 bytes into the memory provider in eeprom. 4161 * Checks the checksum and if it's not correct it uses a set of default 4162 * values. 4163 * 4164 * @eeprom: caller allocated strcuture to read the eeprom data into 4165 * @io_port: io port to read from 4166 **/ 4167static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4168{ 4169 u16 *w_eeprom = (u16 *)eeprom; 4170 u16 w_addr; 4171 u16 cksum; 4172 u32 d_addr; 4173 u32 *d_eeprom; 4174 4175 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4176 4177 cksum = 0; 4178 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4179 w_addr++, w_eeprom++) 4180 cksum += *w_eeprom; 4181 if (cksum != 0x1234) { 4182 /* 4183 * Checksum is wrong. 4184 * Load a set of defaults into the eeprom buffer 4185 */ 4186 dprintkl(KERN_WARNING, 4187 "EEProm checksum error: using default values and options.\n"); 4188 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4189 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4190 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4191 eeprom->sub_sys_id[1] = 4192 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4193 eeprom->sub_class = 0x00; 4194 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4195 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4196 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4197 eeprom->device_id[1] = 4198 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4199 eeprom->reserved = 0x00; 4200 4201 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4202 d_addr < 16; d_addr++, d_eeprom++) 4203 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4204 4205 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4206 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4207 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4208 *d_eeprom = 0x00; 4209 4210 /* Now load defaults (maybe set by boot/module params) */ 4211 set_safe_settings(); 4212 fix_settings(); 4213 eeprom_override(eeprom); 4214 4215 eeprom->cksum = 0x00; 4216 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4217 w_addr < 63; w_addr++, w_eeprom++) 4218 cksum += *w_eeprom; 4219 4220 *w_eeprom = 0x1234 - cksum; 4221 trms1040_write_all(eeprom, io_port); 4222 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4223 } else { 4224 set_safe_settings(); 4225 eeprom_index_to_delay(eeprom); 4226 eeprom_override(eeprom); 4227 } 4228} 4229 4230 4231/** 4232 * print_eeprom_settings - output the eeprom settings 4233 * to the kernel log so people can see what they were. 4234 * 4235 * @eeprom: The eeprom data strucutre to show details for. 4236 **/ 4237static void print_eeprom_settings(struct NvRamType *eeprom) 4238{ 4239 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4240 eeprom->scsi_id, 4241 eeprom->target[0].period, 4242 clock_speed[eeprom->target[0].period] / 10, 4243 clock_speed[eeprom->target[0].period] % 10, 4244 eeprom->target[0].cfg0); 4245 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4246 eeprom->channel_cfg, eeprom->max_tag, 4247 1 << eeprom->max_tag, eeprom->delay_time); 4248} 4249 4250 4251/* Free SG tables */ 4252static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4253{ 4254 int i; 4255 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4256 4257 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4258 kfree(acb->srb_array[i].segment_x); 4259} 4260 4261 4262/* 4263 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4264 * should never cross a page boundary */ 4265static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4266{ 4267 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4268 *SEGMENTX_LEN; 4269 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4270 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4271 int srb_idx = 0; 4272 unsigned i = 0; 4273 struct SGentry *uninitialized_var(ptr); 4274 4275 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4276 acb->srb_array[i].segment_x = NULL; 4277 4278 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4279 while (pages--) { 4280 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); 4281 if (!ptr) { 4282 adapter_sg_tables_free(acb); 4283 return 1; 4284 } 4285 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4286 PAGE_SIZE, ptr, srb_idx); 4287 i = 0; 4288 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4289 acb->srb_array[srb_idx++].segment_x = 4290 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4291 } 4292 if (i < srbs_per_page) 4293 acb->srb.segment_x = 4294 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4295 else 4296 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4297 return 0; 4298} 4299 4300 4301 4302/** 4303 * adapter_print_config - print adapter connection and termination 4304 * config 4305 * 4306 * The io port in the adapter needs to have been set before calling 4307 * this function. 4308 * 4309 * @acb: The adapter to print the information for. 4310 **/ 4311static void adapter_print_config(struct AdapterCtlBlk *acb) 4312{ 4313 u8 bval; 4314 4315 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4316 dprintkl(KERN_INFO, "%sConnectors: ", 4317 ((bval & WIDESCSI) ? "(Wide) " : "")); 4318 if (!(bval & CON5068)) 4319 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4320 if (!(bval & CON68)) 4321 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4322 if (!(bval & CON50)) 4323 printk("int50 "); 4324 if ((bval & (CON5068 | CON50 | CON68)) == 4325 0 /*(CON5068 | CON50 | CON68) */ ) 4326 printk(" Oops! (All 3?) "); 4327 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4328 printk(" Termination: "); 4329 if (bval & DIS_TERM) 4330 printk("Disabled\n"); 4331 else { 4332 if (bval & AUTOTERM) 4333 printk("Auto "); 4334 if (bval & LOW8TERM) 4335 printk("Low "); 4336 if (bval & UP8TERM) 4337 printk("High "); 4338 printk("\n"); 4339 } 4340} 4341 4342 4343/** 4344 * adapter_init_params - Initialize the various parameters in the 4345 * adapter structure. Note that the pointer to the scsi_host is set 4346 * early (when this instance is created) and the io_port and irq 4347 * values are set later after they have been reserved. This just gets 4348 * everything set to a good starting position. 4349 * 4350 * The eeprom structure in the adapter needs to have been set before 4351 * calling this function. 4352 * 4353 * @acb: The adapter to initialize. 4354 **/ 4355static void adapter_init_params(struct AdapterCtlBlk *acb) 4356{ 4357 struct NvRamType *eeprom = &acb->eeprom; 4358 int i; 4359 4360 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4361 /* NOTE: acb->io_port_base is set at port registration time */ 4362 /* NOTE: acb->io_port_len is set at port registration time */ 4363 4364 INIT_LIST_HEAD(&acb->dcb_list); 4365 acb->dcb_run_robin = NULL; 4366 acb->active_dcb = NULL; 4367 4368 INIT_LIST_HEAD(&acb->srb_free_list); 4369 /* temp SRB for Q tag used or abort command used */ 4370 acb->tmp_srb = &acb->srb; 4371 init_timer(&acb->waiting_timer); 4372 init_timer(&acb->selto_timer); 4373 4374 acb->srb_count = DC395x_MAX_SRB_CNT; 4375 4376 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4377 /* NOTE: acb->irq_level is set at IRQ registration time */ 4378 4379 acb->tag_max_num = 1 << eeprom->max_tag; 4380 if (acb->tag_max_num > 30) 4381 acb->tag_max_num = 30; 4382 4383 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4384 acb->gmode2 = eeprom->channel_cfg; 4385 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4386 4387 if (eeprom->channel_cfg & NAC_SCANLUN) 4388 acb->lun_chk = 1; 4389 acb->scan_devices = 1; 4390 4391 acb->scsi_host->this_id = eeprom->scsi_id; 4392 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4393 4394 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4395 acb->dcb_map[i] = 0; 4396 4397 acb->msg_len = 0; 4398 4399 /* link static array of srbs into the srb free list */ 4400 for (i = 0; i < acb->srb_count - 1; i++) 4401 srb_free_insert(acb, &acb->srb_array[i]); 4402} 4403 4404 4405/** 4406 * adapter_init_host - Initialize the scsi host instance based on 4407 * values that we have already stored in the adapter instance. There's 4408 * some mention that a lot of these are deprecated, so we won't use 4409 * them (we'll use the ones in the adapter instance) but we'll fill 4410 * them in in case something else needs them. 4411 * 4412 * The eeprom structure, irq and io ports in the adapter need to have 4413 * been set before calling this function. 4414 * 4415 * @host: The scsi host instance to fill in the values for. 4416 **/ 4417static void adapter_init_scsi_host(struct Scsi_Host *host) 4418{ 4419 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4420 struct NvRamType *eeprom = &acb->eeprom; 4421 4422 host->max_cmd_len = 24; 4423 host->can_queue = DC395x_MAX_CMD_QUEUE; 4424 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4425 host->this_id = (int)eeprom->scsi_id; 4426 host->io_port = acb->io_port_base; 4427 host->n_io_port = acb->io_port_len; 4428 host->dma_channel = -1; 4429 host->unique_id = acb->io_port_base; 4430 host->irq = acb->irq_level; 4431 acb->last_reset = jiffies; 4432 4433 host->max_id = 16; 4434 if (host->max_id - 1 == eeprom->scsi_id) 4435 host->max_id--; 4436 4437#ifdef CONFIG_SCSI_MULTI_LUN 4438 if (eeprom->channel_cfg & NAC_SCANLUN) 4439 host->max_lun = 8; 4440 else 4441 host->max_lun = 1; 4442#else 4443 host->max_lun = 1; 4444#endif 4445 4446} 4447 4448 4449/** 4450 * adapter_init_chip - Get the chip into a know state and figure out 4451 * some of the settings that apply to this adapter. 4452 * 4453 * The io port in the adapter needs to have been set before calling 4454 * this function. The config will be configured correctly on return. 4455 * 4456 * @acb: The adapter which we are to init. 4457 **/ 4458static void adapter_init_chip(struct AdapterCtlBlk *acb) 4459{ 4460 struct NvRamType *eeprom = &acb->eeprom; 4461 4462 /* Mask all the interrupt */ 4463 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4464 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4465 4466 /* Reset SCSI module */ 4467 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4468 4469 /* Reset PCI/DMA module */ 4470 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4471 udelay(20); 4472 4473 /* program configuration 0 */ 4474 acb->config = HCC_AUTOTERM | HCC_PARITY; 4475 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4476 acb->config |= HCC_WIDE_CARD; 4477 4478 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4479 acb->config |= HCC_SCSI_RESET; 4480 4481 if (acb->config & HCC_SCSI_RESET) { 4482 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4483 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4484 4485 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4486 /*spin_unlock_irq (&io_request_lock); */ 4487 udelay(500); 4488 4489 acb->last_reset = 4490 jiffies + HZ / 2 + 4491 HZ * acb->eeprom.delay_time; 4492 4493 /*spin_lock_irq (&io_request_lock); */ 4494 } 4495} 4496 4497 4498/** 4499 * init_adapter - Grab the resource for the card, setup the adapter 4500 * information, set the card into a known state, create the various 4501 * tables etc etc. This basically gets all adapter information all up 4502 * to date, initialised and gets the chip in sync with it. 4503 * 4504 * @host: This hosts adapter structure 4505 * @io_port: The base I/O port 4506 * @irq: IRQ 4507 * 4508 * Returns 0 if the initialization succeeds, any other value on 4509 * failure. 4510 **/ 4511static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port, 4512 u32 io_port_len, unsigned int irq) 4513{ 4514 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4515 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4516 goto failed; 4517 } 4518 /* store port base to indicate we have registered it */ 4519 acb->io_port_base = io_port; 4520 acb->io_port_len = io_port_len; 4521 4522 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { 4523 /* release the region we just claimed */ 4524 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4525 goto failed; 4526 } 4527 /* store irq to indicate we have registered it */ 4528 acb->irq_level = irq; 4529 4530 /* get eeprom configuration information and command line settings etc */ 4531 check_eeprom(&acb->eeprom, io_port); 4532 print_eeprom_settings(&acb->eeprom); 4533 4534 /* setup adapter control block */ 4535 adapter_init_params(acb); 4536 4537 /* display card connectors/termination settings */ 4538 adapter_print_config(acb); 4539 4540 if (adapter_sg_tables_alloc(acb)) { 4541 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4542 goto failed; 4543 } 4544 adapter_init_scsi_host(acb->scsi_host); 4545 adapter_init_chip(acb); 4546 set_basic_config(acb); 4547 4548 dprintkdbg(DBG_0, 4549 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4550 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4551 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4552 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4553 return 0; 4554 4555failed: 4556 if (acb->irq_level) 4557 free_irq(acb->irq_level, acb); 4558 if (acb->io_port_base) 4559 release_region(acb->io_port_base, acb->io_port_len); 4560 adapter_sg_tables_free(acb); 4561 4562 return 1; 4563} 4564 4565 4566/** 4567 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4568 * stopping all operations and disabling interrupt generation on the 4569 * card. 4570 * 4571 * @acb: The adapter which we are to shutdown. 4572 **/ 4573static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4574{ 4575 /* disable interrupts */ 4576 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4577 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4578 4579 /* reset the scsi bus */ 4580 if (acb->config & HCC_SCSI_RESET) 4581 reset_scsi_bus(acb); 4582 4583 /* clear any pending interrupt state */ 4584 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4585} 4586 4587 4588 4589/** 4590 * adapter_uninit - Shut down the chip and release any resources that 4591 * we had allocated. Once this returns the adapter should not be used 4592 * anymore. 4593 * 4594 * @acb: The adapter which we are to un-initialize. 4595 **/ 4596static void adapter_uninit(struct AdapterCtlBlk *acb) 4597{ 4598 unsigned long flags; 4599 DC395x_LOCK_IO(acb->scsi_host, flags); 4600 4601 /* remove timers */ 4602 if (timer_pending(&acb->waiting_timer)) 4603 del_timer(&acb->waiting_timer); 4604 if (timer_pending(&acb->selto_timer)) 4605 del_timer(&acb->selto_timer); 4606 4607 adapter_uninit_chip(acb); 4608 adapter_remove_and_free_all_devices(acb); 4609 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4610 4611 if (acb->irq_level) 4612 free_irq(acb->irq_level, acb); 4613 if (acb->io_port_base) 4614 release_region(acb->io_port_base, acb->io_port_len); 4615 4616 adapter_sg_tables_free(acb); 4617} 4618 4619 4620#undef SPRINTF 4621#define SPRINTF(args...) seq_printf(m,##args) 4622 4623#undef YESNO 4624#define YESNO(YN) \ 4625 if (YN) SPRINTF(" Yes ");\ 4626 else SPRINTF(" No ") 4627 4628static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host) 4629{ 4630 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4631 int spd, spd1; 4632 struct DeviceCtlBlk *dcb; 4633 unsigned long flags; 4634 int dev; 4635 4636 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4637 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4638 4639 DC395x_LOCK_IO(acb->scsi_host, flags); 4640 4641 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4642 SPRINTF("DC395U/UW/F DC315/U %s\n", 4643 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4644 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4645 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4646 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4647 4648 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); 4649 SPRINTF("AdapterID %i\n", host->this_id); 4650 4651 SPRINTF("tag_max_num %i", acb->tag_max_num); 4652 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4653 SPRINTF(", FilterCfg 0x%02x", 4654 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4655 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4656 /*SPRINTF("\n"); */ 4657 4658 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4659 SPRINTF 4660 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4661 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4662 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4663 acb->dcb_map[6], acb->dcb_map[7]); 4664 SPRINTF 4665 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4666 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4667 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4668 acb->dcb_map[14], acb->dcb_map[15]); 4669 4670 SPRINTF 4671 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4672 4673 dev = 0; 4674 list_for_each_entry(dcb, &acb->dcb_list, list) { 4675 int nego_period; 4676 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4677 dcb->target_lun); 4678 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4679 YESNO(dcb->sync_offset); 4680 YESNO(dcb->sync_period & WIDE_SYNC); 4681 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4682 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4683 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4684 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4685 if (dcb->sync_offset) 4686 SPRINTF(" %03i ns ", nego_period); 4687 else 4688 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4689 4690 if (dcb->sync_offset & 0x0f) { 4691 spd = 1000 / (nego_period); 4692 spd1 = 1000 % (nego_period); 4693 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4694 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4695 (dcb->sync_offset & 0x0f)); 4696 } else 4697 SPRINTF(" "); 4698 4699 /* Add more info ... */ 4700 SPRINTF(" %02i\n", dcb->max_command); 4701 dev++; 4702 } 4703 4704 if (timer_pending(&acb->waiting_timer)) 4705 SPRINTF("Waiting queue timer running\n"); 4706 else 4707 SPRINTF("\n"); 4708 4709 list_for_each_entry(dcb, &acb->dcb_list, list) { 4710 struct ScsiReqBlk *srb; 4711 if (!list_empty(&dcb->srb_waiting_list)) 4712 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4713 dcb->target_id, dcb->target_lun, 4714 list_size(&dcb->srb_waiting_list)); 4715 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4716 SPRINTF(" %p", srb->cmd); 4717 if (!list_empty(&dcb->srb_going_list)) 4718 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4719 dcb->target_id, dcb->target_lun, 4720 list_size(&dcb->srb_going_list)); 4721 list_for_each_entry(srb, &dcb->srb_going_list, list) 4722 SPRINTF(" %p", srb->cmd); 4723 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4724 SPRINTF("\n"); 4725 } 4726 4727 if (debug_enabled(DBG_1)) { 4728 SPRINTF("DCB list for ACB %p:\n", acb); 4729 list_for_each_entry(dcb, &acb->dcb_list, list) { 4730 SPRINTF("%p -> ", dcb); 4731 } 4732 SPRINTF("END\n"); 4733 } 4734 4735 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4736 return 0; 4737} 4738 4739 4740static struct scsi_host_template dc395x_driver_template = { 4741 .module = THIS_MODULE, 4742 .proc_name = DC395X_NAME, 4743 .show_info = dc395x_show_info, 4744 .name = DC395X_BANNER " " DC395X_VERSION, 4745 .queuecommand = dc395x_queue_command, 4746 .bios_param = dc395x_bios_param, 4747 .slave_alloc = dc395x_slave_alloc, 4748 .slave_destroy = dc395x_slave_destroy, 4749 .can_queue = DC395x_MAX_CAN_QUEUE, 4750 .this_id = 7, 4751 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4752 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4753 .eh_abort_handler = dc395x_eh_abort, 4754 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4755 .use_clustering = DISABLE_CLUSTERING, 4756}; 4757 4758 4759/** 4760 * banner_display - Display banner on first instance of driver 4761 * initialized. 4762 **/ 4763static void banner_display(void) 4764{ 4765 static int banner_done = 0; 4766 if (!banner_done) 4767 { 4768 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4769 banner_done = 1; 4770 } 4771} 4772 4773 4774/** 4775 * dc395x_init_one - Initialise a single instance of the adapter. 4776 * 4777 * The PCI layer will call this once for each instance of the adapter 4778 * that it finds in the system. The pci_dev strcuture indicates which 4779 * instance we are being called from. 4780 * 4781 * @dev: The PCI device to initialize. 4782 * @id: Looks like a pointer to the entry in our pci device table 4783 * that was actually matched by the PCI subsystem. 4784 * 4785 * Returns 0 on success, or an error code (-ve) on failure. 4786 **/ 4787static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id) 4788{ 4789 struct Scsi_Host *scsi_host = NULL; 4790 struct AdapterCtlBlk *acb = NULL; 4791 unsigned long io_port_base; 4792 unsigned int io_port_len; 4793 unsigned int irq; 4794 4795 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4796 banner_display(); 4797 4798 if (pci_enable_device(dev)) 4799 { 4800 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4801 return -ENODEV; 4802 } 4803 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4804 io_port_len = pci_resource_len(dev, 0); 4805 irq = dev->irq; 4806 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4807 4808 /* allocate scsi host information (includes out adapter) */ 4809 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4810 sizeof(struct AdapterCtlBlk)); 4811 if (!scsi_host) { 4812 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4813 goto fail; 4814 } 4815 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4816 acb->scsi_host = scsi_host; 4817 acb->dev = dev; 4818 4819 /* initialise the adapter and everything we need */ 4820 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4821 dprintkl(KERN_INFO, "adapter init failed\n"); 4822 goto fail; 4823 } 4824 4825 pci_set_master(dev); 4826 4827 /* get the scsi mid level to scan for new devices on the bus */ 4828 if (scsi_add_host(scsi_host, &dev->dev)) { 4829 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4830 goto fail; 4831 } 4832 pci_set_drvdata(dev, scsi_host); 4833 scsi_scan_host(scsi_host); 4834 4835 return 0; 4836 4837fail: 4838 if (acb != NULL) 4839 adapter_uninit(acb); 4840 if (scsi_host != NULL) 4841 scsi_host_put(scsi_host); 4842 pci_disable_device(dev); 4843 return -ENODEV; 4844} 4845 4846 4847/** 4848 * dc395x_remove_one - Called to remove a single instance of the 4849 * adapter. 4850 * 4851 * @dev: The PCI device to initialize. 4852 **/ 4853static void dc395x_remove_one(struct pci_dev *dev) 4854{ 4855 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4856 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4857 4858 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4859 4860 scsi_remove_host(scsi_host); 4861 adapter_uninit(acb); 4862 pci_disable_device(dev); 4863 scsi_host_put(scsi_host); 4864 pci_set_drvdata(dev, NULL); 4865} 4866 4867 4868static struct pci_device_id dc395x_pci_table[] = { 4869 { 4870 .vendor = PCI_VENDOR_ID_TEKRAM, 4871 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4872 .subvendor = PCI_ANY_ID, 4873 .subdevice = PCI_ANY_ID, 4874 }, 4875 {} /* Terminating entry */ 4876}; 4877MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4878 4879 4880static struct pci_driver dc395x_driver = { 4881 .name = DC395X_NAME, 4882 .id_table = dc395x_pci_table, 4883 .probe = dc395x_init_one, 4884 .remove = dc395x_remove_one, 4885}; 4886 4887 4888/** 4889 * dc395x_module_init - Module initialization function 4890 * 4891 * Used by both module and built-in driver to initialise this driver. 4892 **/ 4893static int __init dc395x_module_init(void) 4894{ 4895 return pci_register_driver(&dc395x_driver); 4896} 4897 4898 4899/** 4900 * dc395x_module_exit - Module cleanup function. 4901 **/ 4902static void __exit dc395x_module_exit(void) 4903{ 4904 pci_unregister_driver(&dc395x_driver); 4905} 4906 4907 4908module_init(dc395x_module_init); 4909module_exit(dc395x_module_exit); 4910 4911MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4912MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4913MODULE_LICENSE("GPL"); 4914