1 /* 2 * dc395x.c 3 * 4 * Device Driver for Tekram DC395(U/UW/F), DC315(U) 5 * PCI SCSI Bus Master Host Adapter 6 * (SCSI chip set used Tekram ASIC TRM-S1040) 7 * 8 * Authors: 9 * C.L. Huang <ching@tekram.com.tw> 10 * Erich Chen <erich@tekram.com.tw> 11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. 12 * 13 * Kurt Garloff <garloff@suse.de> 14 * (C) 1999-2000 Kurt Garloff 15 * 16 * Oliver Neukum <oliver@neukum.name> 17 * Ali Akcaagac <aliakc@web.de> 18 * Jamie Lenehan <lenehan@twibble.org> 19 * (C) 2003 20 * 21 * License: GNU GPL 22 * 23 ************************************************************************* 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. The name of the author may not be used to endorse or promote products 34 * derived from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 ************************************************************************ 48 */ 49 #include <linux/module.h> 50 #include <linux/moduleparam.h> 51 #include <linux/delay.h> 52 #include <linux/ctype.h> 53 #include <linux/blkdev.h> 54 #include <linux/interrupt.h> 55 #include <linux/init.h> 56 #include <linux/spinlock.h> 57 #include <linux/pci.h> 58 #include <linux/list.h> 59 #include <linux/vmalloc.h> 60 #include <asm/io.h> 61 62 #include <scsi/scsi.h> 63 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */ 64 #include <scsi/scsi_cmnd.h> 65 #include <scsi/scsi_device.h> 66 #include <scsi/scsi_host.h> 67 68 #include "dc395x.h" 69 70 #define DC395X_NAME "dc395x" 71 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" 72 #define DC395X_VERSION "v2.05, 2004/03/08" 73 74 /*--------------------------------------------------------------------------- 75 Features 76 ---------------------------------------------------------------------------*/ 77 /* 78 * Set to disable parts of the driver 79 */ 80 /*#define DC395x_NO_DISCONNECT*/ 81 /*#define DC395x_NO_TAGQ*/ 82 /*#define DC395x_NO_SYNC*/ 83 /*#define DC395x_NO_WIDE*/ 84 85 /*--------------------------------------------------------------------------- 86 Debugging 87 ---------------------------------------------------------------------------*/ 88 /* 89 * Types of debugging that can be enabled and disabled 90 */ 91 #define DBG_KG 0x0001 92 #define DBG_0 0x0002 93 #define DBG_1 0x0004 94 #define DBG_SG 0x0020 95 #define DBG_FIFO 0x0040 96 #define DBG_PIO 0x0080 97 98 99 /* 100 * Set set of things to output debugging for. 101 * Undefine to remove all debugging 102 */ 103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ 104 /*#define DEBUG_MASK DBG_0*/ 105 106 107 /* 108 * Output a kernel mesage at the specified level and append the 109 * driver name and a ": " to the start of the message 110 */ 111 #define dprintkl(level, format, arg...) \ 112 printk(level DC395X_NAME ": " format , ## arg) 113 114 115 #ifdef DEBUG_MASK 116 /* 117 * print a debug message - this is formated with KERN_DEBUG, then the 118 * driver name followed by a ": " and then the message is output. 119 * This also checks that the specified debug level is enabled before 120 * outputing the message 121 */ 122 #define dprintkdbg(type, format, arg...) \ 123 do { \ 124 if ((type) & (DEBUG_MASK)) \ 125 dprintkl(KERN_DEBUG , format , ## arg); \ 126 } while (0) 127 128 /* 129 * Check if the specified type of debugging is enabled 130 */ 131 #define debug_enabled(type) ((DEBUG_MASK) & (type)) 132 133 #else 134 /* 135 * No debugging. Do nothing 136 */ 137 #define dprintkdbg(type, format, arg...) \ 138 do {} while (0) 139 #define debug_enabled(type) (0) 140 141 #endif 142 143 144 #ifndef PCI_VENDOR_ID_TEKRAM 145 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ 146 #endif 147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ 149 #endif 150 151 152 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) 153 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) 154 155 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) 156 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) 157 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) 158 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) 159 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) 160 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) 161 162 /* cmd->result */ 163 #define RES_TARGET 0x000000FF /* Target State */ 164 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */ 165 #define RES_ENDMSG 0x0000FF00 /* End Message */ 166 #define RES_DID 0x00FF0000 /* DID_ codes */ 167 #define RES_DRV 0xFF000000 /* DRIVER_ codes */ 168 169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) 170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) 171 172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } 173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } 174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } 175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } 176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } 177 178 #define TAG_NONE 255 179 180 /* 181 * srb->segement_x is the hw sg list. It is always allocated as a 182 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not 183 * cross a page boundy. 184 */ 185 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) 186 187 188 struct SGentry { 189 u32 address; /* bus! address */ 190 u32 length; 191 }; 192 193 /* The SEEPROM structure for TRM_S1040 */ 194 struct NVRamTarget { 195 u8 cfg0; /* Target configuration byte 0 */ 196 u8 period; /* Target period */ 197 u8 cfg2; /* Target configuration byte 2 */ 198 u8 cfg3; /* Target configuration byte 3 */ 199 }; 200 201 struct NvRamType { 202 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ 203 u8 sub_sys_id[2]; /* 2,3 Sub System ID */ 204 u8 sub_class; /* 4 Sub Class */ 205 u8 vendor_id[2]; /* 5,6 Vendor ID */ 206 u8 device_id[2]; /* 7,8 Device ID */ 207 u8 reserved; /* 9 Reserved */ 208 struct NVRamTarget target[DC395x_MAX_SCSI_ID]; 209 /** 10,11,12,13 210 ** 14,15,16,17 211 ** .... 212 ** .... 213 ** 70,71,72,73 214 */ 215 u8 scsi_id; /* 74 Host Adapter SCSI ID */ 216 u8 channel_cfg; /* 75 Channel configuration */ 217 u8 delay_time; /* 76 Power on delay time */ 218 u8 max_tag; /* 77 Maximum tags */ 219 u8 reserved0; /* 78 */ 220 u8 boot_target; /* 79 */ 221 u8 boot_lun; /* 80 */ 222 u8 reserved1; /* 81 */ 223 u16 reserved2[22]; /* 82,..125 */ 224 u16 cksum; /* 126,127 */ 225 }; 226 227 struct ScsiReqBlk { 228 struct list_head list; /* next/prev ptrs for srb lists */ 229 struct DeviceCtlBlk *dcb; 230 struct scsi_cmnd *cmd; 231 232 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ 233 u32 sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ 234 235 u8 sg_count; /* No of HW sg entries for this request */ 236 u8 sg_index; /* Index of HW sg entry for this request */ 237 u32 total_xfer_length; /* Total number of bytes remaining to be transfered */ 238 unsigned char *virt_addr; /* Virtual address of current transfer position */ 239 240 /* 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 u32 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 }; 268 269 struct 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 }; 295 296 struct 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 u16 srb_count; 312 313 u8 sel_timeout; 314 315 unsigned int irq_level; 316 u8 tag_max_num; 317 u8 acb_flag; 318 u8 gmode2; 319 320 u8 config; 321 u8 lun_chk; 322 u8 scan_devices; 323 u8 hostid_bit; 324 325 u8 dcb_map[DC395x_MAX_SCSI_ID]; 326 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 327 328 struct pci_dev *dev; 329 330 u8 msg_len; 331 332 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 333 struct ScsiReqBlk srb; 334 335 struct NvRamType eeprom; /* eeprom settings for this adapter */ 336 }; 337 338 339 /*--------------------------------------------------------------------------- 340 Forward declarations 341 ---------------------------------------------------------------------------*/ 342 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 343 u16 *pscsi_status); 344 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 345 u16 *pscsi_status); 346 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 347 u16 *pscsi_status); 348 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 349 u16 *pscsi_status); 350 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 351 u16 *pscsi_status); 352 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 353 u16 *pscsi_status); 354 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 355 u16 *pscsi_status); 356 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 357 u16 *pscsi_status); 358 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 359 u16 *pscsi_status); 360 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 361 u16 *pscsi_status); 362 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 363 u16 *pscsi_status); 364 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 365 u16 *pscsi_status); 366 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 367 u16 *pscsi_status); 368 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 369 u16 *pscsi_status); 370 static void set_basic_config(struct AdapterCtlBlk *acb); 371 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 372 struct ScsiReqBlk *srb); 373 static void reset_scsi_bus(struct AdapterCtlBlk *acb); 374 static void data_io_transfer(struct AdapterCtlBlk *acb, 375 struct ScsiReqBlk *srb, u16 io_dir); 376 static void disconnect(struct AdapterCtlBlk *acb); 377 static void reselect(struct AdapterCtlBlk *acb); 378 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 379 struct ScsiReqBlk *srb); 380 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 381 struct ScsiReqBlk *srb); 382 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 383 struct ScsiReqBlk *srb); 384 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 385 struct scsi_cmnd *cmd, u8 force); 386 static void scsi_reset_detect(struct AdapterCtlBlk *acb); 387 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 388 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 389 struct ScsiReqBlk *srb); 390 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 391 struct ScsiReqBlk *srb); 392 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 393 struct ScsiReqBlk *srb); 394 static void set_xfer_rate(struct AdapterCtlBlk *acb, 395 struct DeviceCtlBlk *dcb); 396 static void waiting_timeout(unsigned long ptr); 397 398 399 /*--------------------------------------------------------------------------- 400 Static Data 401 ---------------------------------------------------------------------------*/ 402 static u16 current_sync_offset = 0; 403 404 static void *dc395x_scsi_phase0[] = { 405 data_out_phase0,/* phase:0 */ 406 data_in_phase0, /* phase:1 */ 407 command_phase0, /* phase:2 */ 408 status_phase0, /* phase:3 */ 409 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 410 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 411 msgout_phase0, /* phase:6 */ 412 msgin_phase0, /* phase:7 */ 413 }; 414 415 static void *dc395x_scsi_phase1[] = { 416 data_out_phase1,/* phase:0 */ 417 data_in_phase1, /* phase:1 */ 418 command_phase1, /* phase:2 */ 419 status_phase1, /* phase:3 */ 420 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 421 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 422 msgout_phase1, /* phase:6 */ 423 msgin_phase1, /* phase:7 */ 424 }; 425 426 /* 427 *Fast20: 000 50ns, 20.0 MHz 428 * 001 75ns, 13.3 MHz 429 * 010 100ns, 10.0 MHz 430 * 011 125ns, 8.0 MHz 431 * 100 150ns, 6.6 MHz 432 * 101 175ns, 5.7 MHz 433 * 110 200ns, 5.0 MHz 434 * 111 250ns, 4.0 MHz 435 * 436 *Fast40(LVDS): 000 25ns, 40.0 MHz 437 * 001 50ns, 20.0 MHz 438 * 010 75ns, 13.3 MHz 439 * 011 100ns, 10.0 MHz 440 * 100 125ns, 8.0 MHz 441 * 101 150ns, 6.6 MHz 442 * 110 175ns, 5.7 MHz 443 * 111 200ns, 5.0 MHz 444 */ 445 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 446 447 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 448 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 449 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 450 451 452 /*--------------------------------------------------------------------------- 453 Configuration 454 ---------------------------------------------------------------------------*/ 455 /* 456 * Module/boot parameters currently effect *all* instances of the 457 * card in the system. 458 */ 459 460 /* 461 * Command line parameters are stored in a structure below. 462 * These are the index's into the structure for the various 463 * command line options. 464 */ 465 #define CFG_ADAPTER_ID 0 466 #define CFG_MAX_SPEED 1 467 #define CFG_DEV_MODE 2 468 #define CFG_ADAPTER_MODE 3 469 #define CFG_TAGS 4 470 #define CFG_RESET_DELAY 5 471 472 #define CFG_NUM 6 /* number of configuration items */ 473 474 475 /* 476 * Value used to indicate that a command line override 477 * hasn't been used to modify the value. 478 */ 479 #define CFG_PARAM_UNSET -1 480 481 482 /* 483 * Hold command line parameters. 484 */ 485 struct ParameterData { 486 int value; /* value of this setting */ 487 int min; /* minimum value */ 488 int max; /* maximum value */ 489 int def; /* default value */ 490 int safe; /* safe value */ 491 }; 492 static struct ParameterData __devinitdata cfg_data[] = { 493 { /* adapter id */ 494 CFG_PARAM_UNSET, 495 0, 496 15, 497 7, 498 7 499 }, 500 { /* max speed */ 501 CFG_PARAM_UNSET, 502 0, 503 7, 504 1, /* 13.3Mhz */ 505 4, /* 6.7Hmz */ 506 }, 507 { /* dev mode */ 508 CFG_PARAM_UNSET, 509 0, 510 0x3f, 511 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 512 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 513 NTC_DO_SEND_START, 514 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 515 }, 516 { /* adapter mode */ 517 CFG_PARAM_UNSET, 518 0, 519 0x2f, 520 #ifdef CONFIG_SCSI_MULTI_LUN 521 NAC_SCANLUN | 522 #endif 523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET 524 /*| NAC_ACTIVE_NEG*/, 525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 526 }, 527 { /* tags */ 528 CFG_PARAM_UNSET, 529 0, 530 5, 531 3, /* 16 tags (??) */ 532 2, 533 }, 534 { /* reset delay */ 535 CFG_PARAM_UNSET, 536 0, 537 180, 538 1, /* 1 second */ 539 10, /* 10 seconds */ 540 } 541 }; 542 543 544 /* 545 * Safe settings. If set to zero the the BIOS/default values with 546 * command line overrides will be used. If set to 1 then safe and 547 * slow settings will be used. 548 */ 549 static int use_safe_settings = 0; 550 module_param_named(safe, use_safe_settings, bool, 0); 551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); 552 553 554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); 555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); 556 557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); 558 MODULE_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"); 559 560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); 561 MODULE_PARM_DESC(dev_mode, "Device mode."); 562 563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); 564 MODULE_PARM_DESC(adapter_mode, "Adapter mode."); 565 566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); 567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); 568 569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); 570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); 571 572 573 /** 574 * set_safe_settings - if the use_safe_settings option is set then 575 * set all values to the safe and slow values. 576 **/ 577 static void __devinit set_safe_settings(void) 578 { 579 if (use_safe_settings) 580 { 581 int i; 582 583 dprintkl(KERN_INFO, "Using safe settings.\n"); 584 for (i = 0; i < CFG_NUM; i++) 585 { 586 cfg_data[i].value = cfg_data[i].safe; 587 } 588 } 589 } 590 591 592 /** 593 * fix_settings - reset any boot parameters which are out of range 594 * back to the default values. 595 **/ 596 static void __devinit fix_settings(void) 597 { 598 int i; 599 600 dprintkdbg(DBG_1, 601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " 602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", 603 cfg_data[CFG_ADAPTER_ID].value, 604 cfg_data[CFG_MAX_SPEED].value, 605 cfg_data[CFG_DEV_MODE].value, 606 cfg_data[CFG_ADAPTER_MODE].value, 607 cfg_data[CFG_TAGS].value, 608 cfg_data[CFG_RESET_DELAY].value); 609 for (i = 0; i < CFG_NUM; i++) 610 { 611 if (cfg_data[i].value < cfg_data[i].min 612 || cfg_data[i].value > cfg_data[i].max) 613 cfg_data[i].value = cfg_data[i].def; 614 } 615 } 616 617 618 619 /* 620 * Mapping from the eeprom delay index value (index into this array) 621 * to the the number of actual seconds that the delay should be for. 622 */ 623 static char __devinitdata eeprom_index_to_delay_map[] = 624 { 1, 3, 5, 10, 16, 30, 60, 120 }; 625 626 627 /** 628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it 629 * into a number of seconds. 630 * 631 * @eeprom: The eeprom structure in which we find the delay index to map. 632 **/ 633 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom) 634 { 635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; 636 } 637 638 639 /** 640 * delay_to_eeprom_index - Take a delay in seconds and return the 641 * closest eeprom index which will delay for at least that amount of 642 * seconds. 643 * 644 * @delay: The delay, in seconds, to find the eeprom index for. 645 **/ 646 static int __devinit delay_to_eeprom_index(int delay) 647 { 648 u8 idx = 0; 649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) 650 idx++; 651 return idx; 652 } 653 654 655 /** 656 * eeprom_override - Override the eeprom settings, in the provided 657 * eeprom structure, with values that have been set on the command 658 * line. 659 * 660 * @eeprom: The eeprom data to override with command line options. 661 **/ 662 static void __devinit eeprom_override(struct NvRamType *eeprom) 663 { 664 u8 id; 665 666 /* Adapter Settings */ 667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) 668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; 669 670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) 671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; 672 673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) 674 eeprom->delay_time = delay_to_eeprom_index( 675 cfg_data[CFG_RESET_DELAY].value); 676 677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) 678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; 679 680 /* Device Settings */ 681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { 682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) 683 eeprom->target[id].cfg0 = 684 (u8)cfg_data[CFG_DEV_MODE].value; 685 686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) 687 eeprom->target[id].period = 688 (u8)cfg_data[CFG_MAX_SPEED].value; 689 690 } 691 } 692 693 694 /*--------------------------------------------------------------------------- 695 ---------------------------------------------------------------------------*/ 696 697 static unsigned int list_size(struct list_head *head) 698 { 699 unsigned int count = 0; 700 struct list_head *pos; 701 list_for_each(pos, head) 702 count++; 703 return count; 704 } 705 706 707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, 708 struct DeviceCtlBlk *pos) 709 { 710 int use_next = 0; 711 struct DeviceCtlBlk* next = NULL; 712 struct DeviceCtlBlk* i; 713 714 if (list_empty(head)) 715 return NULL; 716 717 /* find supplied dcb and then select the next one */ 718 list_for_each_entry(i, head, list) 719 if (use_next) { 720 next = i; 721 break; 722 } else if (i == pos) { 723 use_next = 1; 724 } 725 /* if no next one take the head one (ie, wraparound) */ 726 if (!next) 727 list_for_each_entry(i, head, list) { 728 next = i; 729 break; 730 } 731 732 return next; 733 } 734 735 736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 737 { 738 if (srb->tag_number < 255) { 739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ 740 srb->tag_number = 255; 741 } 742 } 743 744 745 /* Find cmd in SRB list */ 746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 747 struct list_head *head) 748 { 749 struct ScsiReqBlk *i; 750 list_for_each_entry(i, head, list) 751 if (i->cmd == cmd) 752 return i; 753 return NULL; 754 } 755 756 757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) 758 { 759 struct list_head *head = &acb->srb_free_list; 760 struct ScsiReqBlk *srb = NULL; 761 762 if (!list_empty(head)) { 763 srb = list_entry(head->next, struct ScsiReqBlk, list); 764 list_del(head->next); 765 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); 766 } 767 return srb; 768 } 769 770 771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 772 { 773 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); 774 list_add_tail(&srb->list, &acb->srb_free_list); 775 } 776 777 778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb, 779 struct ScsiReqBlk *srb) 780 { 781 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n", 782 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 783 list_add(&srb->list, &dcb->srb_waiting_list); 784 } 785 786 787 static void srb_waiting_append(struct DeviceCtlBlk *dcb, 788 struct ScsiReqBlk *srb) 789 { 790 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n", 791 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 792 list_add_tail(&srb->list, &dcb->srb_waiting_list); 793 } 794 795 796 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 797 { 798 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n", 799 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 800 list_add_tail(&srb->list, &dcb->srb_going_list); 801 } 802 803 804 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 805 { 806 struct ScsiReqBlk *i; 807 struct ScsiReqBlk *tmp; 808 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n", 809 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 810 811 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) 812 if (i == srb) { 813 list_del(&srb->list); 814 break; 815 } 816 } 817 818 819 static void srb_waiting_remove(struct DeviceCtlBlk *dcb, 820 struct ScsiReqBlk *srb) 821 { 822 struct ScsiReqBlk *i; 823 struct ScsiReqBlk *tmp; 824 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n", 825 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 826 827 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) 828 if (i == srb) { 829 list_del(&srb->list); 830 break; 831 } 832 } 833 834 835 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, 836 struct ScsiReqBlk *srb) 837 { 838 dprintkdbg(DBG_0, 839 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n", 840 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 841 list_move(&srb->list, &dcb->srb_waiting_list); 842 } 843 844 845 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, 846 struct ScsiReqBlk *srb) 847 { 848 dprintkdbg(DBG_0, 849 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n", 850 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 851 list_move(&srb->list, &dcb->srb_going_list); 852 } 853 854 855 /* Sets the timer to wake us up */ 856 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 857 { 858 if (timer_pending(&acb->waiting_timer)) 859 return; 860 init_timer(&acb->waiting_timer); 861 acb->waiting_timer.function = waiting_timeout; 862 acb->waiting_timer.data = (unsigned long) acb; 863 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) 864 acb->waiting_timer.expires = 865 acb->scsi_host->last_reset - HZ / 2 + 1; 866 else 867 acb->waiting_timer.expires = jiffies + to + 1; 868 add_timer(&acb->waiting_timer); 869 } 870 871 872 /* Send the next command from the waiting list to the bus */ 873 static void waiting_process_next(struct AdapterCtlBlk *acb) 874 { 875 struct DeviceCtlBlk *start = NULL; 876 struct DeviceCtlBlk *pos; 877 struct DeviceCtlBlk *dcb; 878 struct ScsiReqBlk *srb; 879 struct list_head *dcb_list_head = &acb->dcb_list; 880 881 if (acb->active_dcb 882 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 883 return; 884 885 if (timer_pending(&acb->waiting_timer)) 886 del_timer(&acb->waiting_timer); 887 888 if (list_empty(dcb_list_head)) 889 return; 890 891 /* 892 * Find the starting dcb. Need to find it again in the list 893 * since the list may have changed since we set the ptr to it 894 */ 895 list_for_each_entry(dcb, dcb_list_head, list) 896 if (dcb == acb->dcb_run_robin) { 897 start = dcb; 898 break; 899 } 900 if (!start) { 901 /* This can happen! */ 902 start = list_entry(dcb_list_head->next, typeof(*start), list); 903 acb->dcb_run_robin = start; 904 } 905 906 907 /* 908 * Loop over the dcb, but we start somewhere (potentially) in 909 * the middle of the loop so we need to manully do this. 910 */ 911 pos = start; 912 do { 913 struct list_head *waiting_list_head = &pos->srb_waiting_list; 914 915 /* Make sure, the next another device gets scheduled ... */ 916 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 917 acb->dcb_run_robin); 918 919 if (list_empty(waiting_list_head) || 920 pos->max_command <= list_size(&pos->srb_going_list)) { 921 /* move to next dcb */ 922 pos = dcb_get_next(dcb_list_head, pos); 923 } else { 924 srb = list_entry(waiting_list_head->next, 925 struct ScsiReqBlk, list); 926 927 /* Try to send to the bus */ 928 if (!start_scsi(acb, pos, srb)) 929 srb_waiting_to_going_move(pos, srb); 930 else 931 waiting_set_timer(acb, HZ/50); 932 break; 933 } 934 } while (pos != start); 935 } 936 937 938 /* Wake up waiting queue */ 939 static void waiting_timeout(unsigned long ptr) 940 { 941 unsigned long flags; 942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 943 dprintkdbg(DBG_1, 944 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 945 DC395x_LOCK_IO(acb->scsi_host, flags); 946 waiting_process_next(acb); 947 DC395x_UNLOCK_IO(acb->scsi_host, flags); 948 } 949 950 951 /* Get the DCB for a given ID/LUN combination */ 952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 953 { 954 return acb->children[id][lun]; 955 } 956 957 958 /* Send SCSI Request Block (srb) to adapter (acb) */ 959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 960 { 961 struct DeviceCtlBlk *dcb = srb->dcb; 962 963 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 964 acb->active_dcb || 965 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 966 srb_waiting_append(dcb, srb); 967 waiting_process_next(acb); 968 return; 969 } 970 971 if (!start_scsi(acb, dcb, srb)) 972 srb_going_append(dcb, srb); 973 else { 974 srb_waiting_insert(dcb, srb); 975 waiting_set_timer(acb, HZ / 50); 976 } 977 } 978 979 static inline void pio_trigger(void) 980 { 981 static int feedback_requested; 982 983 if (!feedback_requested) { 984 feedback_requested = 1; 985 printk(KERN_WARNING "%s: Please, contact <linux-scsi@vger.kernel.org> " 986 "to help improve support for your system.\n", __FILE__); 987 } 988 } 989 990 /* Prepare SRB for being sent to Device DCB w/ command *cmd */ 991 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 992 struct ScsiReqBlk *srb) 993 { 994 enum dma_data_direction dir = cmd->sc_data_direction; 995 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", 996 cmd->pid, dcb->target_id, dcb->target_lun); 997 998 srb->dcb = dcb; 999 srb->cmd = cmd; 1000 srb->sg_count = 0; 1001 srb->total_xfer_length = 0; 1002 srb->sg_bus_addr = 0; 1003 srb->virt_addr = NULL; 1004 srb->sg_index = 0; 1005 srb->adapter_status = 0; 1006 srb->target_status = 0; 1007 srb->msg_count = 0; 1008 srb->status = 0; 1009 srb->flag = 0; 1010 srb->state = 0; 1011 srb->retry_count = 0; 1012 srb->tag_number = TAG_NONE; 1013 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1014 srb->end_message = 0; 1015 1016 if (dir == PCI_DMA_NONE || !cmd->request_buffer) { 1017 dprintkdbg(DBG_0, 1018 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1019 cmd->bufflen, cmd->request_buffer, 1020 cmd->use_sg, srb->segment_x[0].address); 1021 } else if (cmd->use_sg) { 1022 int i; 1023 u32 reqlen = cmd->request_bufflen; 1024 struct scatterlist *sl = (struct scatterlist *) 1025 cmd->request_buffer; 1026 struct SGentry *sgp = srb->segment_x; 1027 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, 1028 dir); 1029 dprintkdbg(DBG_0, 1030 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1031 reqlen, cmd->request_buffer, cmd->use_sg, 1032 srb->sg_count); 1033 1034 srb->virt_addr = page_address(sl->page); 1035 for (i = 0; i < srb->sg_count; i++) { 1036 u32 busaddr = (u32)sg_dma_address(&sl[i]); 1037 u32 seglen = (u32)sl[i].length; 1038 sgp[i].address = busaddr; 1039 sgp[i].length = seglen; 1040 srb->total_xfer_length += seglen; 1041 } 1042 sgp += srb->sg_count - 1; 1043 1044 /* 1045 * adjust last page if too big as it is allocated 1046 * on even page boundaries 1047 */ 1048 if (srb->total_xfer_length > reqlen) { 1049 sgp->length -= (srb->total_xfer_length - reqlen); 1050 srb->total_xfer_length = reqlen; 1051 } 1052 1053 /* Fixup for WIDE padding - make sure length is even */ 1054 if (dcb->sync_period & WIDE_SYNC && 1055 srb->total_xfer_length % 2) { 1056 srb->total_xfer_length++; 1057 sgp->length++; 1058 } 1059 1060 srb->sg_bus_addr = pci_map_single(dcb->acb->dev, 1061 srb->segment_x, 1062 SEGMENTX_LEN, 1063 PCI_DMA_TODEVICE); 1064 1065 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 1066 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 1067 } else { 1068 srb->total_xfer_length = cmd->request_bufflen; 1069 srb->sg_count = 1; 1070 srb->segment_x[0].address = 1071 pci_map_single(dcb->acb->dev, cmd->request_buffer, 1072 srb->total_xfer_length, dir); 1073 1074 /* Fixup for WIDE padding - make sure length is even */ 1075 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) 1076 srb->total_xfer_length++; 1077 1078 srb->segment_x[0].length = srb->total_xfer_length; 1079 srb->virt_addr = cmd->request_buffer; 1080 dprintkdbg(DBG_0, 1081 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", 1082 srb->total_xfer_length, cmd->request_buffer, 1083 cmd->use_sg, srb->segment_x[0].address); 1084 } 1085 } 1086 1087 1088 /** 1089 * dc395x_queue_command - queue scsi command passed from the mid 1090 * layer, invoke 'done' on completion 1091 * 1092 * @cmd: pointer to scsi command object 1093 * @done: function pointer to be invoked on completion 1094 * 1095 * Returns 1 if the adapter (host) is busy, else returns 0. One 1096 * reason for an adapter to be busy is that the number 1097 * of outstanding queued commands is already equal to 1098 * struct Scsi_Host::can_queue . 1099 * 1100 * Required: if struct Scsi_Host::can_queue is ever non-zero 1101 * then this function is required. 1102 * 1103 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1104 * and is expected to be held on return. 1105 * 1106 **/ 1107 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1108 { 1109 struct DeviceCtlBlk *dcb; 1110 struct ScsiReqBlk *srb; 1111 struct AdapterCtlBlk *acb = 1112 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1113 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", 1114 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 1115 1116 /* Assume BAD_TARGET; will be cleared later */ 1117 cmd->result = DID_BAD_TARGET << 16; 1118 1119 /* ignore invalid targets */ 1120 if (cmd->device->id >= acb->scsi_host->max_id || 1121 cmd->device->lun >= acb->scsi_host->max_lun || 1122 cmd->device->lun >31) { 1123 goto complete; 1124 } 1125 1126 /* does the specified lun on the specified device exist */ 1127 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1128 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1129 cmd->device->id, cmd->device->lun); 1130 goto complete; 1131 } 1132 1133 /* do we have a DCB for the device */ 1134 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1135 if (!dcb) { 1136 /* should never happen */ 1137 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1138 cmd->device->id, cmd->device->lun); 1139 goto complete; 1140 } 1141 1142 /* set callback and clear result in the command */ 1143 cmd->scsi_done = done; 1144 cmd->result = 0; 1145 1146 srb = srb_get_free(acb); 1147 if (!srb) 1148 { 1149 /* 1150 * Return 1 since we are unable to queue this command at this 1151 * point in time. 1152 */ 1153 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1154 return 1; 1155 } 1156 1157 build_srb(cmd, dcb, srb); 1158 1159 if (!list_empty(&dcb->srb_waiting_list)) { 1160 /* append to waiting queue */ 1161 srb_waiting_append(dcb, srb); 1162 waiting_process_next(acb); 1163 } else { 1164 /* process immediately */ 1165 send_srb(acb, srb); 1166 } 1167 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid); 1168 return 0; 1169 1170 complete: 1171 /* 1172 * Complete the command immediatey, and then return 0 to 1173 * indicate that we have handled the command. This is usually 1174 * done when the commad is for things like non existent 1175 * devices. 1176 */ 1177 done(cmd); 1178 return 0; 1179 } 1180 1181 1182 /* 1183 * Return the disk geometry for the given SCSI device. 1184 */ 1185 static int dc395x_bios_param(struct scsi_device *sdev, 1186 struct block_device *bdev, sector_t capacity, int *info) 1187 { 1188 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1189 int heads, sectors, cylinders; 1190 struct AdapterCtlBlk *acb; 1191 int size = capacity; 1192 1193 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1194 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1195 heads = 64; 1196 sectors = 32; 1197 cylinders = size / (heads * sectors); 1198 1199 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1200 heads = 255; 1201 sectors = 63; 1202 cylinders = size / (heads * sectors); 1203 } 1204 geom[0] = heads; 1205 geom[1] = sectors; 1206 geom[2] = cylinders; 1207 return 0; 1208 #else 1209 return scsicam_bios_param(bdev, capacity, info); 1210 #endif 1211 } 1212 1213 1214 static void dump_register_info(struct AdapterCtlBlk *acb, 1215 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1216 { 1217 u16 pstat; 1218 struct pci_dev *dev = acb->dev; 1219 pci_read_config_word(dev, PCI_STATUS, &pstat); 1220 if (!dcb) 1221 dcb = acb->active_dcb; 1222 if (!srb && dcb) 1223 srb = dcb->active_srb; 1224 if (srb) { 1225 if (!srb->cmd) 1226 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1227 srb, srb->cmd); 1228 else 1229 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " 1230 "cmnd=0x%02x <%02i-%i>\n", 1231 srb, srb->cmd, srb->cmd->pid, 1232 srb->cmd->cmnd[0], srb->cmd->device->id, 1233 srb->cmd->device->lun); 1234 printk(" sglist=%p cnt=%i idx=%i len=%i\n", 1235 srb->segment_x, srb->sg_count, srb->sg_index, 1236 srb->total_xfer_length); 1237 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1238 srb->state, srb->status, srb->scsi_phase, 1239 (acb->active_dcb) ? "" : "not"); 1240 } 1241 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1242 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1243 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1244 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1245 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1246 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1247 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1248 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1249 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1250 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1251 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1252 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1253 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1254 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1255 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1256 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1257 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1258 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1259 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1260 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1261 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1262 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1263 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1264 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1265 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1266 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1267 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1268 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1269 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1270 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1271 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1272 "pci{status=0x%04x}\n", 1273 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1274 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1275 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1276 pstat); 1277 } 1278 1279 1280 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1281 { 1282 #if debug_enabled(DBG_FIFO) 1283 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1284 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1285 if (!(fifocnt & 0x40)) 1286 dprintkdbg(DBG_FIFO, 1287 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1288 fifocnt & 0x3f, lines, txt); 1289 #endif 1290 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1291 } 1292 1293 1294 static void reset_dev_param(struct AdapterCtlBlk *acb) 1295 { 1296 struct DeviceCtlBlk *dcb; 1297 struct NvRamType *eeprom = &acb->eeprom; 1298 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1299 1300 list_for_each_entry(dcb, &acb->dcb_list, list) { 1301 u8 period_index; 1302 1303 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1304 dcb->sync_period = 0; 1305 dcb->sync_offset = 0; 1306 1307 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1308 period_index = eeprom->target[dcb->target_id].period & 0x07; 1309 dcb->min_nego_period = clock_period[period_index]; 1310 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1311 || !(acb->config & HCC_WIDE_CARD)) 1312 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1313 } 1314 } 1315 1316 1317 /* 1318 * perform a hard reset on the SCSI bus 1319 * @cmd - some command for this host (for fetching hooks) 1320 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1321 */ 1322 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1323 { 1324 struct AdapterCtlBlk *acb = 1325 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1326 dprintkl(KERN_INFO, 1327 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", 1328 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1329 1330 if (timer_pending(&acb->waiting_timer)) 1331 del_timer(&acb->waiting_timer); 1332 1333 /* 1334 * disable interrupt 1335 */ 1336 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1337 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1338 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1339 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1340 1341 reset_scsi_bus(acb); 1342 udelay(500); 1343 1344 /* We may be in serious trouble. Wait some seconds */ 1345 acb->scsi_host->last_reset = 1346 jiffies + 3 * HZ / 2 + 1347 HZ * acb->eeprom.delay_time; 1348 1349 /* 1350 * re-enable interrupt 1351 */ 1352 /* Clear SCSI FIFO */ 1353 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1354 clear_fifo(acb, "eh_bus_reset"); 1355 /* Delete pending IRQ */ 1356 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1357 set_basic_config(acb); 1358 1359 reset_dev_param(acb); 1360 doing_srb_done(acb, DID_RESET, cmd, 0); 1361 acb->active_dcb = NULL; 1362 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1363 waiting_process_next(acb); 1364 1365 return SUCCESS; 1366 } 1367 1368 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1369 { 1370 int rc; 1371 1372 spin_lock_irq(cmd->device->host->host_lock); 1373 rc = __dc395x_eh_bus_reset(cmd); 1374 spin_unlock_irq(cmd->device->host->host_lock); 1375 1376 return rc; 1377 } 1378 1379 /* 1380 * abort an errant SCSI command 1381 * @cmd - command to be aborted 1382 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1383 */ 1384 static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1385 { 1386 /* 1387 * Look into our command queues: If it has not been sent already, 1388 * we remove it and return success. Otherwise fail. 1389 */ 1390 struct AdapterCtlBlk *acb = 1391 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1392 struct DeviceCtlBlk *dcb; 1393 struct ScsiReqBlk *srb; 1394 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", 1395 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1396 1397 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1398 if (!dcb) { 1399 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1400 return FAILED; 1401 } 1402 1403 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1404 if (srb) { 1405 srb_waiting_remove(dcb, srb); 1406 pci_unmap_srb_sense(acb, srb); 1407 pci_unmap_srb(acb, srb); 1408 free_tag(dcb, srb); 1409 srb_free_insert(acb, srb); 1410 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1411 cmd->result = DID_ABORT << 16; 1412 return SUCCESS; 1413 } 1414 srb = find_cmd(cmd, &dcb->srb_going_list); 1415 if (srb) { 1416 dprintkl(KERN_DEBUG, "eh_abort: Command in progress"); 1417 /* XXX: Should abort the command here */ 1418 } else { 1419 dprintkl(KERN_DEBUG, "eh_abort: Command not found"); 1420 } 1421 return FAILED; 1422 } 1423 1424 1425 /* SDTR */ 1426 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1427 struct ScsiReqBlk *srb) 1428 { 1429 u8 *ptr = srb->msgout_buf + srb->msg_count; 1430 if (srb->msg_count > 1) { 1431 dprintkl(KERN_INFO, 1432 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1433 srb->msg_count, srb->msgout_buf[0], 1434 srb->msgout_buf[1]); 1435 return; 1436 } 1437 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1438 dcb->sync_offset = 0; 1439 dcb->min_nego_period = 200 >> 2; 1440 } else if (dcb->sync_offset == 0) 1441 dcb->sync_offset = SYNC_NEGO_OFFSET; 1442 1443 *ptr++ = MSG_EXTENDED; /* (01h) */ 1444 *ptr++ = 3; /* length */ 1445 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1446 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1447 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1448 srb->msg_count += 5; 1449 srb->state |= SRB_DO_SYNC_NEGO; 1450 } 1451 1452 1453 /* WDTR */ 1454 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1455 struct ScsiReqBlk *srb) 1456 { 1457 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1458 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1459 u8 *ptr = srb->msgout_buf + srb->msg_count; 1460 if (srb->msg_count > 1) { 1461 dprintkl(KERN_INFO, 1462 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1463 srb->msg_count, srb->msgout_buf[0], 1464 srb->msgout_buf[1]); 1465 return; 1466 } 1467 *ptr++ = MSG_EXTENDED; /* (01h) */ 1468 *ptr++ = 2; /* length */ 1469 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1470 *ptr++ = wide; 1471 srb->msg_count += 4; 1472 srb->state |= SRB_DO_WIDE_NEGO; 1473 } 1474 1475 1476 #if 0 1477 /* Timer to work around chip flaw: When selecting and the bus is 1478 * busy, we sometimes miss a Selection timeout IRQ */ 1479 void selection_timeout_missed(unsigned long ptr); 1480 /* Sets the timer to wake us up */ 1481 static void selto_timer(struct AdapterCtlBlk *acb) 1482 { 1483 if (timer_pending(&acb->selto_timer)) 1484 return; 1485 acb->selto_timer.function = selection_timeout_missed; 1486 acb->selto_timer.data = (unsigned long) acb; 1487 if (time_before 1488 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) 1489 acb->selto_timer.expires = 1490 acb->scsi_host->last_reset + HZ / 2 + 1; 1491 else 1492 acb->selto_timer.expires = jiffies + HZ + 1; 1493 add_timer(&acb->selto_timer); 1494 } 1495 1496 1497 void selection_timeout_missed(unsigned long ptr) 1498 { 1499 unsigned long flags; 1500 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1501 struct ScsiReqBlk *srb; 1502 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1503 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1504 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1505 return; 1506 } 1507 DC395x_LOCK_IO(acb->scsi_host, flags); 1508 srb = acb->active_dcb->active_srb; 1509 disconnect(acb); 1510 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1511 } 1512 #endif 1513 1514 1515 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1516 struct ScsiReqBlk* srb) 1517 { 1518 u16 s_stat2, return_code; 1519 u8 s_stat, scsicommand, i, identify_message; 1520 u8 *ptr; 1521 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", 1522 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 1523 1524 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1525 1526 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1527 s_stat2 = 0; 1528 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1529 #if 1 1530 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1531 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", 1532 srb->cmd->pid, s_stat, s_stat2); 1533 /* 1534 * Try anyway? 1535 * 1536 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1537 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! 1538 * (This is likely to be a bug in the hardware. Obviously, most people 1539 * only have one initiator per SCSI bus.) 1540 * Instead let this fail and have the timer make sure the command is 1541 * tried again after a short time 1542 */ 1543 /*selto_timer (acb); */ 1544 return 1; 1545 } 1546 #endif 1547 if (acb->active_dcb) { 1548 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" 1549 "command while another command (pid#%li) is active.", 1550 srb->cmd->pid, 1551 acb->active_dcb->active_srb ? 1552 acb->active_dcb->active_srb->cmd->pid : 0); 1553 return 1; 1554 } 1555 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1556 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", 1557 srb->cmd->pid); 1558 return 1; 1559 } 1560 /* Allow starting of SCSI commands half a second before we allow the mid-level 1561 * to queue them again after a reset */ 1562 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { 1563 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1564 return 1; 1565 } 1566 1567 /* Flush FIFO */ 1568 clear_fifo(acb, "start_scsi"); 1569 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1570 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1571 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1572 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1573 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1574 1575 identify_message = dcb->identify_msg; 1576 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1577 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1578 if (srb->flag & AUTO_REQSENSE) 1579 identify_message &= 0xBF; 1580 1581 if (((srb->cmd->cmnd[0] == INQUIRY) 1582 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1583 || (srb->flag & AUTO_REQSENSE)) 1584 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1585 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1586 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1587 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1588 && (dcb->target_lun == 0)) { 1589 srb->msgout_buf[0] = identify_message; 1590 srb->msg_count = 1; 1591 scsicommand = SCMD_SEL_ATNSTOP; 1592 srb->state = SRB_MSGOUT; 1593 #ifndef SYNC_FIRST 1594 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1595 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1596 build_wdtr(acb, dcb, srb); 1597 goto no_cmd; 1598 } 1599 #endif 1600 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1601 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1602 build_sdtr(acb, dcb, srb); 1603 goto no_cmd; 1604 } 1605 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1606 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1607 build_wdtr(acb, dcb, srb); 1608 goto no_cmd; 1609 } 1610 srb->msg_count = 0; 1611 } 1612 /* Send identify message */ 1613 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1614 1615 scsicommand = SCMD_SEL_ATN; 1616 srb->state = SRB_START_; 1617 #ifndef DC395x_NO_TAGQ 1618 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1619 && (identify_message & 0xC0)) { 1620 /* Send Tag message */ 1621 u32 tag_mask = 1; 1622 u8 tag_number = 0; 1623 while (tag_mask & dcb->tag_mask 1624 && tag_number <= dcb->max_command) { 1625 tag_mask = tag_mask << 1; 1626 tag_number++; 1627 } 1628 if (tag_number >= dcb->max_command) { 1629 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " 1630 "Out of tags target=<%02i-%i>)\n", 1631 srb->cmd->pid, srb->cmd->device->id, 1632 srb->cmd->device->lun); 1633 srb->state = SRB_READY; 1634 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1635 DO_HWRESELECT); 1636 return 1; 1637 } 1638 /* Send Tag id */ 1639 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1640 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1641 dcb->tag_mask |= tag_mask; 1642 srb->tag_number = tag_number; 1643 scsicommand = SCMD_SEL_ATN3; 1644 srb->state = SRB_START_; 1645 } 1646 #endif 1647 /*polling:*/ 1648 /* Send CDB ..command block ......... */ 1649 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", 1650 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 1651 srb->cmd->cmnd[0], srb->tag_number); 1652 if (srb->flag & AUTO_REQSENSE) { 1653 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1654 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1655 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1656 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1657 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1658 sizeof(srb->cmd->sense_buffer)); 1659 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1660 } else { 1661 ptr = (u8 *)srb->cmd->cmnd; 1662 for (i = 0; i < srb->cmd->cmd_len; i++) 1663 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1664 } 1665 no_cmd: 1666 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1667 DO_HWRESELECT | DO_DATALATCH); 1668 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1669 /* 1670 * If start_scsi return 1: 1671 * we caught an interrupt (must be reset or reselection ... ) 1672 * : Let's process it first! 1673 */ 1674 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", 1675 srb->cmd->pid, dcb->target_id, dcb->target_lun); 1676 srb->state = SRB_READY; 1677 free_tag(dcb, srb); 1678 srb->msg_count = 0; 1679 return_code = 1; 1680 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1681 } else { 1682 /* 1683 * If start_scsi returns 0: 1684 * we know that the SCSI processor is free 1685 */ 1686 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1687 dcb->active_srb = srb; 1688 acb->active_dcb = dcb; 1689 return_code = 0; 1690 /* it's important for atn stop */ 1691 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1692 DO_DATALATCH | DO_HWRESELECT); 1693 /* SCSI command */ 1694 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1695 } 1696 return return_code; 1697 } 1698 1699 1700 #define DC395x_ENABLE_MSGOUT \ 1701 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1702 srb->state |= SRB_MSGOUT 1703 1704 1705 /* abort command */ 1706 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1707 struct ScsiReqBlk *srb) 1708 { 1709 srb->msgout_buf[0] = ABORT; 1710 srb->msg_count = 1; 1711 DC395x_ENABLE_MSGOUT; 1712 srb->state &= ~SRB_MSGIN; 1713 srb->state |= SRB_MSGOUT; 1714 } 1715 1716 1717 /** 1718 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1719 * have been triggered for this card. 1720 * 1721 * @acb: a pointer to the adpter control block 1722 * @scsi_status: the status return when we checked the card 1723 **/ 1724 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1725 u16 scsi_status) 1726 { 1727 struct DeviceCtlBlk *dcb; 1728 struct ScsiReqBlk *srb; 1729 u16 phase; 1730 u8 scsi_intstatus; 1731 unsigned long flags; 1732 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1733 u16 *); 1734 1735 DC395x_LOCK_IO(acb->scsi_host, flags); 1736 1737 /* This acknowledges the IRQ */ 1738 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1739 if ((scsi_status & 0x2007) == 0x2002) 1740 dprintkl(KERN_DEBUG, 1741 "COP after COP completed? %04x\n", scsi_status); 1742 if (debug_enabled(DBG_KG)) { 1743 if (scsi_intstatus & INT_SELTIMEOUT) 1744 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1745 } 1746 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1747 1748 if (timer_pending(&acb->selto_timer)) 1749 del_timer(&acb->selto_timer); 1750 1751 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1752 disconnect(acb); /* bus free interrupt */ 1753 goto out_unlock; 1754 } 1755 if (scsi_intstatus & INT_RESELECTED) { 1756 reselect(acb); 1757 goto out_unlock; 1758 } 1759 if (scsi_intstatus & INT_SELECT) { 1760 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1761 goto out_unlock; 1762 } 1763 if (scsi_intstatus & INT_SCSIRESET) { 1764 scsi_reset_detect(acb); 1765 goto out_unlock; 1766 } 1767 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1768 dcb = acb->active_dcb; 1769 if (!dcb) { 1770 dprintkl(KERN_DEBUG, 1771 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1772 scsi_status, scsi_intstatus); 1773 goto out_unlock; 1774 } 1775 srb = dcb->active_srb; 1776 if (dcb->flag & ABORT_DEV_) { 1777 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1778 enable_msgout_abort(acb, srb); 1779 } 1780 1781 /* software sequential machine */ 1782 phase = (u16)srb->scsi_phase; 1783 1784 /* 1785 * 62037 or 62137 1786 * call dc395x_scsi_phase0[]... "phase entry" 1787 * handle every phase before start transfer 1788 */ 1789 /* data_out_phase0, phase:0 */ 1790 /* data_in_phase0, phase:1 */ 1791 /* command_phase0, phase:2 */ 1792 /* status_phase0, phase:3 */ 1793 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1794 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1795 /* msgout_phase0, phase:6 */ 1796 /* msgin_phase0, phase:7 */ 1797 dc395x_statev = dc395x_scsi_phase0[phase]; 1798 dc395x_statev(acb, srb, &scsi_status); 1799 1800 /* 1801 * if there were any exception occured scsi_status 1802 * will be modify to bus free phase new scsi_status 1803 * transfer out from ... previous dc395x_statev 1804 */ 1805 srb->scsi_phase = scsi_status & PHASEMASK; 1806 phase = (u16)scsi_status & PHASEMASK; 1807 1808 /* 1809 * call dc395x_scsi_phase1[]... "phase entry" handle 1810 * every phase to do transfer 1811 */ 1812 /* data_out_phase1, phase:0 */ 1813 /* data_in_phase1, phase:1 */ 1814 /* command_phase1, phase:2 */ 1815 /* status_phase1, phase:3 */ 1816 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1817 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1818 /* msgout_phase1, phase:6 */ 1819 /* msgin_phase1, phase:7 */ 1820 dc395x_statev = dc395x_scsi_phase1[phase]; 1821 dc395x_statev(acb, srb, &scsi_status); 1822 } 1823 out_unlock: 1824 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1825 } 1826 1827 1828 static irqreturn_t dc395x_interrupt(int irq, void *dev_id, 1829 struct pt_regs *regs) 1830 { 1831 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id; 1832 u16 scsi_status; 1833 u8 dma_status; 1834 irqreturn_t handled = IRQ_NONE; 1835 1836 /* 1837 * Check for pending interupt 1838 */ 1839 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1840 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1841 if (scsi_status & SCSIINTERRUPT) { 1842 /* interupt pending - let's process it! */ 1843 dc395x_handle_interrupt(acb, scsi_status); 1844 handled = IRQ_HANDLED; 1845 } 1846 else if (dma_status & 0x20) { 1847 /* Error from the DMA engine */ 1848 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1849 #if 0 1850 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1851 if (acb->active_dcb) { 1852 acb->active_dcb-> flag |= ABORT_DEV_; 1853 if (acb->active_dcb->active_srb) 1854 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1855 } 1856 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1857 #else 1858 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1859 acb = NULL; 1860 #endif 1861 handled = IRQ_HANDLED; 1862 } 1863 1864 return handled; 1865 } 1866 1867 1868 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1869 u16 *pscsi_status) 1870 { 1871 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid); 1872 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1873 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1874 1875 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1876 srb->state &= ~SRB_MSGOUT; 1877 } 1878 1879 1880 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1881 u16 *pscsi_status) 1882 { 1883 u16 i; 1884 u8 *ptr; 1885 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid); 1886 1887 clear_fifo(acb, "msgout_phase1"); 1888 if (!(srb->state & SRB_MSGOUT)) { 1889 srb->state |= SRB_MSGOUT; 1890 dprintkl(KERN_DEBUG, 1891 "msgout_phase1: (pid#%li) Phase unexpected\n", 1892 srb->cmd->pid); /* So what ? */ 1893 } 1894 if (!srb->msg_count) { 1895 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", 1896 srb->cmd->pid); 1897 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1898 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1899 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1900 return; 1901 } 1902 ptr = (u8 *)srb->msgout_buf; 1903 for (i = 0; i < srb->msg_count; i++) 1904 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1905 srb->msg_count = 0; 1906 if (srb->msgout_buf[0] == MSG_ABORT) 1907 srb->state = SRB_ABORT_SENT; 1908 1909 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1910 } 1911 1912 1913 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1914 u16 *pscsi_status) 1915 { 1916 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid); 1917 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1918 } 1919 1920 1921 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1922 u16 *pscsi_status) 1923 { 1924 struct DeviceCtlBlk *dcb; 1925 u8 *ptr; 1926 u16 i; 1927 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid); 1928 1929 clear_fifo(acb, "command_phase1"); 1930 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1931 if (!(srb->flag & AUTO_REQSENSE)) { 1932 ptr = (u8 *)srb->cmd->cmnd; 1933 for (i = 0; i < srb->cmd->cmd_len; i++) { 1934 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1935 ptr++; 1936 } 1937 } else { 1938 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1939 dcb = acb->active_dcb; 1940 /* target id */ 1941 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1942 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1943 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1944 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1945 sizeof(srb->cmd->sense_buffer)); 1946 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1947 } 1948 srb->state |= SRB_COMMAND; 1949 /* it's important for atn stop */ 1950 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1951 /* SCSI command */ 1952 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1953 } 1954 1955 1956 /* 1957 * Verify that the remaining space in the hw sg lists is the same as 1958 * the count of remaining bytes in srb->total_xfer_length 1959 */ 1960 static void sg_verify_length(struct ScsiReqBlk *srb) 1961 { 1962 if (debug_enabled(DBG_SG)) { 1963 unsigned len = 0; 1964 unsigned idx = srb->sg_index; 1965 struct SGentry *psge = srb->segment_x + idx; 1966 for (; idx < srb->sg_count; psge++, idx++) 1967 len += psge->length; 1968 if (len != srb->total_xfer_length) 1969 dprintkdbg(DBG_SG, 1970 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1971 srb->total_xfer_length, len); 1972 } 1973 } 1974 1975 1976 /* 1977 * Compute the next Scatter Gather list index and adjust its length 1978 * and address if necessary; also compute virt_addr 1979 */ 1980 static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1981 { 1982 u8 idx; 1983 struct scatterlist *sg; 1984 struct scsi_cmnd *cmd = srb->cmd; 1985 int segment = cmd->use_sg; 1986 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ 1987 struct SGentry *psge = srb->segment_x + srb->sg_index; 1988 1989 dprintkdbg(DBG_0, 1990 "sg_update_list: Transfered %i of %i bytes, %i remain\n", 1991 xferred, srb->total_xfer_length, left); 1992 if (xferred == 0) { 1993 /* nothing to update since we did not transfer any data */ 1994 return; 1995 } 1996 1997 sg_verify_length(srb); 1998 srb->total_xfer_length = left; /* update remaining count */ 1999 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 2000 if (xferred >= psge->length) { 2001 /* Complete SG entries done */ 2002 xferred -= psge->length; 2003 } else { 2004 /* Partial SG entry done */ 2005 psge->length -= xferred; 2006 psge->address += xferred; 2007 srb->sg_index = idx; 2008 pci_dma_sync_single_for_device(srb->dcb-> 2009 acb->dev, 2010 srb->sg_bus_addr, 2011 SEGMENTX_LEN, 2012 PCI_DMA_TODEVICE); 2013 break; 2014 } 2015 psge++; 2016 } 2017 sg_verify_length(srb); 2018 2019 /* we need the corresponding virtual address */ 2020 if (!segment) { 2021 srb->virt_addr += xferred; 2022 return; 2023 } 2024 2025 /* We have to walk the scatterlist to find it */ 2026 sg = (struct scatterlist *)cmd->request_buffer; 2027 while (segment--) { 2028 unsigned long mask = 2029 ~((unsigned long)sg->length - 1) & PAGE_MASK; 2030 if ((sg_dma_address(sg) & mask) == (psge->address & mask)) { 2031 srb->virt_addr = (page_address(sg->page) 2032 + psge->address - 2033 (psge->address & PAGE_MASK)); 2034 return; 2035 } 2036 ++sg; 2037 } 2038 2039 dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n"); 2040 srb->virt_addr = NULL; 2041 } 2042 2043 2044 /* 2045 * We have transfered a single byte (PIO mode?) and need to update 2046 * the count of bytes remaining (total_xfer_length) and update the sg 2047 * entry to either point to next byte in the current sg entry, or of 2048 * already at the end to point to the start of the next sg entry 2049 */ 2050 static void sg_subtract_one(struct ScsiReqBlk *srb) 2051 { 2052 srb->total_xfer_length--; 2053 srb->segment_x[srb->sg_index].length--; 2054 if (srb->total_xfer_length && 2055 !srb->segment_x[srb->sg_index].length) { 2056 if (debug_enabled(DBG_PIO)) 2057 printk(" (next segment)"); 2058 srb->sg_index++; 2059 sg_update_list(srb, srb->total_xfer_length); 2060 } 2061 } 2062 2063 2064 /* 2065 * cleanup_after_transfer 2066 * 2067 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2068 * KG: Currently called from StatusPhase1 () 2069 * Should probably also be called from other places 2070 * Best might be to call it in DataXXPhase0, if new phase will differ 2071 */ 2072 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2073 struct ScsiReqBlk *srb) 2074 { 2075 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2076 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2077 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2078 clear_fifo(acb, "cleanup/in"); 2079 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2080 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2081 } else { /* write */ 2082 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2083 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2084 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2085 clear_fifo(acb, "cleanup/out"); 2086 } 2087 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2088 } 2089 2090 2091 /* 2092 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO 2093 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2094 */ 2095 #define DC395x_LASTPIO 4 2096 2097 2098 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2099 u16 *pscsi_status) 2100 { 2101 struct DeviceCtlBlk *dcb = srb->dcb; 2102 u16 scsi_status = *pscsi_status; 2103 u32 d_left_counter = 0; 2104 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", 2105 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2106 2107 /* 2108 * KG: We need to drain the buffers before we draw any conclusions! 2109 * This means telling the DMA to push the rest into SCSI, telling 2110 * SCSI to push the rest to the bus. 2111 * However, the device might have been the one to stop us (phase 2112 * change), and the data in transit just needs to be accounted so 2113 * it can be retransmitted.) 2114 */ 2115 /* 2116 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2117 * If we need more data, the DMA SG list will be freshly set up, anyway 2118 */ 2119 dprintkdbg(DBG_PIO, "data_out_phase0: " 2120 "DMA{fifcnt=0x%02x fifostat=0x%02x} " 2121 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2122 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2123 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2124 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2125 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2126 srb->total_xfer_length); 2127 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2128 2129 if (!(srb->state & SRB_XFERPAD)) { 2130 if (scsi_status & PARITYERROR) 2131 srb->status |= PARITY_ERROR; 2132 2133 /* 2134 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2135 * is the no of bytes it got from the DMA engine not the no it 2136 * transferred successfully to the device. (And the difference could 2137 * be as much as the FIFO size, I guess ...) 2138 */ 2139 if (!(scsi_status & SCSIXFERDONE)) { 2140 /* 2141 * when data transfer from DMA FIFO to SCSI FIFO 2142 * if there was some data left in SCSI FIFO 2143 */ 2144 d_left_counter = 2145 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2146 0x1F); 2147 if (dcb->sync_period & WIDE_SYNC) 2148 d_left_counter <<= 1; 2149 2150 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2151 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2152 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2153 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2154 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2155 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2156 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2157 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2158 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2159 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2160 } 2161 /* 2162 * calculate all the residue data that not yet tranfered 2163 * SCSI transfer counter + left in SCSI FIFO data 2164 * 2165 * .....TRM_S1040_SCSI_COUNTER (24bits) 2166 * The counter always decrement by one for every SCSI byte transfer. 2167 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2168 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2169 */ 2170 if (srb->total_xfer_length > DC395x_LASTPIO) 2171 d_left_counter += 2172 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2173 2174 /* Is this a good idea? */ 2175 /*clear_fifo(acb, "DOP1"); */ 2176 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2177 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2178 && srb->cmd->request_bufflen % 2) { 2179 d_left_counter = 0; 2180 dprintkl(KERN_INFO, 2181 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2182 scsi_status); 2183 } 2184 /* 2185 * KG: Oops again. Same thinko as above: The SCSI might have been 2186 * faster than the DMA engine, so that it ran out of data. 2187 * In that case, we have to do just nothing! 2188 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2189 */ 2190 /* 2191 * KG: This is nonsense: We have been WRITING data to the bus 2192 * If the SCSI engine has no bytes left, how should the DMA engine? 2193 */ 2194 if (d_left_counter == 0) { 2195 srb->total_xfer_length = 0; 2196 } else { 2197 /* 2198 * if transfer not yet complete 2199 * there were some data residue in SCSI FIFO or 2200 * SCSI transfer counter not empty 2201 */ 2202 long oldxferred = 2203 srb->total_xfer_length - d_left_counter; 2204 const int diff = 2205 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2206 sg_update_list(srb, d_left_counter); 2207 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2208 if ((srb->segment_x[srb->sg_index].length == 2209 diff && srb->cmd->use_sg) 2210 || ((oldxferred & ~PAGE_MASK) == 2211 (PAGE_SIZE - diff)) 2212 ) { 2213 dprintkl(KERN_INFO, "data_out_phase0: " 2214 "Work around chip bug (%i)?\n", diff); 2215 d_left_counter = 2216 srb->total_xfer_length - diff; 2217 sg_update_list(srb, d_left_counter); 2218 /*srb->total_xfer_length -= diff; */ 2219 /*srb->virt_addr += diff; */ 2220 /*if (srb->cmd->use_sg) */ 2221 /* srb->sg_index++; */ 2222 } 2223 } 2224 } 2225 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2226 cleanup_after_transfer(acb, srb); 2227 } 2228 } 2229 2230 2231 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2232 u16 *pscsi_status) 2233 { 2234 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", 2235 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2236 clear_fifo(acb, "data_out_phase1"); 2237 /* do prepare before transfer when data out phase */ 2238 data_io_transfer(acb, srb, XFERDATAOUT); 2239 } 2240 2241 2242 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2243 u16 *pscsi_status) 2244 { 2245 u16 scsi_status = *pscsi_status; 2246 u32 d_left_counter = 0; 2247 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", 2248 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2249 2250 /* 2251 * KG: DataIn is much more tricky than DataOut. When the device is finished 2252 * and switches to another phase, the SCSI engine should be finished too. 2253 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2254 * engine and transferred to memory. 2255 * We should wait for the FIFOs to be emptied by that (is there any way to 2256 * enforce this?) and then stop the DMA engine, because it might think, that 2257 * there are more bytes to follow. Yes, the device might disconnect prior to 2258 * having all bytes transferred! 2259 * Also we should make sure that all data from the DMA engine buffer's really 2260 * made its way to the system memory! Some documentation on this would not 2261 * seem to be a bad idea, actually. 2262 */ 2263 if (!(srb->state & SRB_XFERPAD)) { 2264 if (scsi_status & PARITYERROR) { 2265 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " 2266 "Parity Error\n", srb->cmd->pid); 2267 srb->status |= PARITY_ERROR; 2268 } 2269 /* 2270 * KG: We should wait for the DMA FIFO to be empty ... 2271 * but: it would be better to wait first for the SCSI FIFO and then the 2272 * the DMA FIFO to become empty? How do we know, that the device not already 2273 * sent data to the FIFO in a MsgIn phase, eg.? 2274 */ 2275 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2276 #if 0 2277 int ctr = 6000000; 2278 dprintkl(KERN_DEBUG, 2279 "DIP0: Wait for DMA FIFO to flush ...\n"); 2280 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2281 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2282 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2283 while (! 2284 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2285 0x80) && --ctr); 2286 if (ctr < 6000000 - 1) 2287 dprintkl(KERN_DEBUG 2288 "DIP0: Had to wait for DMA ...\n"); 2289 if (!ctr) 2290 dprintkl(KERN_ERR, 2291 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2292 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2293 #endif 2294 dprintkdbg(DBG_KG, "data_in_phase0: " 2295 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2296 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2297 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2298 } 2299 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2300 d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER) 2301 + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f) 2302 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2303 0)); 2304 dprintkdbg(DBG_KG, "data_in_phase0: " 2305 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2306 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2307 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2308 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2309 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2310 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2311 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2312 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2313 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2314 srb->total_xfer_length, d_left_counter); 2315 #if DC395x_LASTPIO 2316 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ 2317 if (d_left_counter 2318 && srb->total_xfer_length <= DC395x_LASTPIO) { 2319 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2320 /*sg_update_list (srb, d_left_counter); */ 2321 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to " 2322 "%p for remaining %i bytes:", 2323 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f, 2324 (srb->dcb->sync_period & WIDE_SYNC) ? 2325 "words" : "bytes", 2326 srb->virt_addr, 2327 srb->total_xfer_length); 2328 if (srb->dcb->sync_period & WIDE_SYNC) 2329 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2330 CFG2_WIDEFIFO); 2331 while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) { 2332 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2333 pio_trigger(); 2334 *(srb->virt_addr)++ = byte; 2335 if (debug_enabled(DBG_PIO)) 2336 printk(" %02x", byte); 2337 d_left_counter--; 2338 sg_subtract_one(srb); 2339 } 2340 if (srb->dcb->sync_period & WIDE_SYNC) { 2341 #if 1 2342 /* Read the last byte ... */ 2343 if (srb->total_xfer_length > 0) { 2344 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2345 pio_trigger(); 2346 *(srb->virt_addr)++ = byte; 2347 srb->total_xfer_length--; 2348 if (debug_enabled(DBG_PIO)) 2349 printk(" %02x", byte); 2350 } 2351 #endif 2352 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2353 } 2354 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2355 /*srb->total_xfer_length = 0; */ 2356 if (debug_enabled(DBG_PIO)) 2357 printk("\n"); 2358 } 2359 #endif /* DC395x_LASTPIO */ 2360 2361 #if 0 2362 /* 2363 * KG: This was in DATAOUT. Does it also belong here? 2364 * Nobody seems to know what counter and fifo_cnt count exactly ... 2365 */ 2366 if (!(scsi_status & SCSIXFERDONE)) { 2367 /* 2368 * when data transfer from DMA FIFO to SCSI FIFO 2369 * if there was some data left in SCSI FIFO 2370 */ 2371 d_left_counter = 2372 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2373 0x1F); 2374 if (srb->dcb->sync_period & WIDE_SYNC) 2375 d_left_counter <<= 1; 2376 /* 2377 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2378 * so need to *= 2 2379 * KG: Seems to be correct ... 2380 */ 2381 } 2382 #endif 2383 /* KG: This should not be needed any more! */ 2384 if (d_left_counter == 0 2385 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2386 #if 0 2387 int ctr = 6000000; 2388 u8 TempDMAstatus; 2389 do { 2390 TempDMAstatus = 2391 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2392 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2393 if (!ctr) 2394 dprintkl(KERN_ERR, 2395 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2396 srb->total_xfer_length = 0; 2397 #endif 2398 srb->total_xfer_length = d_left_counter; 2399 } else { /* phase changed */ 2400 /* 2401 * parsing the case: 2402 * when a transfer not yet complete 2403 * but be disconnected by target 2404 * if transfer not yet complete 2405 * there were some data residue in SCSI FIFO or 2406 * SCSI transfer counter not empty 2407 */ 2408 sg_update_list(srb, d_left_counter); 2409 } 2410 } 2411 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2412 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2413 cleanup_after_transfer(acb, srb); 2414 } 2415 } 2416 2417 2418 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2419 u16 *pscsi_status) 2420 { 2421 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", 2422 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2423 data_io_transfer(acb, srb, XFERDATAIN); 2424 } 2425 2426 2427 static void data_io_transfer(struct AdapterCtlBlk *acb, 2428 struct ScsiReqBlk *srb, u16 io_dir) 2429 { 2430 struct DeviceCtlBlk *dcb = srb->dcb; 2431 u8 bval; 2432 dprintkdbg(DBG_0, 2433 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2434 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 2435 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2436 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2437 if (srb == acb->tmp_srb) 2438 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2439 if (srb->sg_index >= srb->sg_count) { 2440 /* can't happen? out of bounds error */ 2441 return; 2442 } 2443 2444 if (srb->total_xfer_length > DC395x_LASTPIO) { 2445 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2446 /* 2447 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2448 * Maybe, even ABORTXFER would be appropriate 2449 */ 2450 if (dma_status & XFERPENDING) { 2451 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2452 "Expect trouble!\n"); 2453 dump_register_info(acb, dcb, srb); 2454 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2455 } 2456 /* clear_fifo(acb, "IO"); */ 2457 /* 2458 * load what physical address of Scatter/Gather list table 2459 * want to be transfer 2460 */ 2461 srb->state |= SRB_DATA_XFER; 2462 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2463 if (srb->cmd->use_sg) { /* with S/G */ 2464 io_dir |= DMACMD_SG; 2465 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2466 srb->sg_bus_addr + 2467 sizeof(struct SGentry) * 2468 srb->sg_index); 2469 /* load how many bytes in the sg list table */ 2470 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2471 ((u32)(srb->sg_count - 2472 srb->sg_index) << 3)); 2473 } else { /* without S/G */ 2474 io_dir &= ~DMACMD_SG; 2475 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2476 srb->segment_x[0].address); 2477 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2478 srb->segment_x[0].length); 2479 } 2480 /* load total transfer length (24bits) max value 16Mbyte */ 2481 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2482 srb->total_xfer_length); 2483 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2484 if (io_dir & DMACMD_DIR) { /* read */ 2485 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2486 SCMD_DMA_IN); 2487 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2488 } else { 2489 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2490 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2491 SCMD_DMA_OUT); 2492 } 2493 2494 } 2495 #if DC395x_LASTPIO 2496 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2497 /* 2498 * load what physical address of Scatter/Gather list table 2499 * want to be transfer 2500 */ 2501 srb->state |= SRB_DATA_XFER; 2502 /* load total transfer length (24bits) max value 16Mbyte */ 2503 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2504 srb->total_xfer_length); 2505 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2506 if (io_dir & DMACMD_DIR) { /* read */ 2507 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2508 SCMD_FIFO_IN); 2509 } else { /* write */ 2510 int ln = srb->total_xfer_length; 2511 if (srb->dcb->sync_period & WIDE_SYNC) 2512 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2513 CFG2_WIDEFIFO); 2514 dprintkdbg(DBG_PIO, 2515 "data_io_transfer: PIO %i bytes from %p:", 2516 srb->total_xfer_length, srb->virt_addr); 2517 2518 while (srb->total_xfer_length) { 2519 if (debug_enabled(DBG_PIO)) 2520 printk(" %02x", (unsigned char) *(srb->virt_addr)); 2521 2522 pio_trigger(); 2523 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 2524 *(srb->virt_addr)++); 2525 2526 sg_subtract_one(srb); 2527 } 2528 if (srb->dcb->sync_period & WIDE_SYNC) { 2529 if (ln % 2) { 2530 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2531 if (debug_enabled(DBG_PIO)) 2532 printk(" |00"); 2533 } 2534 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2535 } 2536 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2537 if (debug_enabled(DBG_PIO)) 2538 printk("\n"); 2539 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2540 SCMD_FIFO_OUT); 2541 } 2542 } 2543 #endif /* DC395x_LASTPIO */ 2544 else { /* xfer pad */ 2545 u8 data = 0, data2 = 0; 2546 if (srb->sg_count) { 2547 srb->adapter_status = H_OVER_UNDER_RUN; 2548 srb->status |= OVER_RUN; 2549 } 2550 /* 2551 * KG: despite the fact that we are using 16 bits I/O ops 2552 * the SCSI FIFO is only 8 bits according to the docs 2553 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2554 */ 2555 if (dcb->sync_period & WIDE_SYNC) { 2556 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2557 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2558 CFG2_WIDEFIFO); 2559 if (io_dir & DMACMD_DIR) { 2560 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2561 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2562 } else { 2563 /* Danger, Robinson: If you find KGs 2564 * scattered over the wide disk, the driver 2565 * or chip is to blame :-( */ 2566 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2567 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2568 } 2569 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2570 } else { 2571 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2572 /* Danger, Robinson: If you find a collection of Ks on your disk 2573 * something broke :-( */ 2574 if (io_dir & DMACMD_DIR) 2575 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2576 else 2577 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2578 } 2579 srb->state |= SRB_XFERPAD; 2580 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2581 /* SCSI command */ 2582 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2583 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2584 } 2585 } 2586 2587 2588 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2589 u16 *pscsi_status) 2590 { 2591 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", 2592 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2593 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2594 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2595 srb->state = SRB_COMPLETED; 2596 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2598 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2599 } 2600 2601 2602 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2603 u16 *pscsi_status) 2604 { 2605 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", 2606 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2607 srb->state = SRB_STATUS; 2608 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2609 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2610 } 2611 2612 2613 /* Check if the message is complete */ 2614 static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2615 { 2616 if (*msgbuf == EXTENDED_MESSAGE) { 2617 if (len < 2) 2618 return 0; 2619 if (len < msgbuf[1] + 2) 2620 return 0; 2621 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2622 if (len < 2) 2623 return 0; 2624 return 1; 2625 } 2626 2627 /* reject_msg */ 2628 static inline void msgin_reject(struct AdapterCtlBlk *acb, 2629 struct ScsiReqBlk *srb) 2630 { 2631 srb->msgout_buf[0] = MESSAGE_REJECT; 2632 srb->msg_count = 1; 2633 DC395x_ENABLE_MSGOUT; 2634 srb->state &= ~SRB_MSGIN; 2635 srb->state |= SRB_MSGOUT; 2636 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2637 srb->msgin_buf[0], 2638 srb->dcb->target_id, srb->dcb->target_lun); 2639 } 2640 2641 2642 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2643 struct DeviceCtlBlk *dcb, u8 tag) 2644 { 2645 struct ScsiReqBlk *srb = NULL; 2646 struct ScsiReqBlk *i; 2647 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", 2648 srb->cmd->pid, tag, srb); 2649 2650 if (!(dcb->tag_mask & (1 << tag))) 2651 dprintkl(KERN_DEBUG, 2652 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2653 dcb->tag_mask, tag); 2654 2655 if (list_empty(&dcb->srb_going_list)) 2656 goto mingx0; 2657 list_for_each_entry(i, &dcb->srb_going_list, list) { 2658 if (i->tag_number == tag) { 2659 srb = i; 2660 break; 2661 } 2662 } 2663 if (!srb) 2664 goto mingx0; 2665 2666 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", 2667 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun); 2668 if (dcb->flag & ABORT_DEV_) { 2669 /*srb->state = SRB_ABORT_SENT; */ 2670 enable_msgout_abort(acb, srb); 2671 } 2672 2673 if (!(srb->state & SRB_DISCONNECT)) 2674 goto mingx0; 2675 2676 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2677 srb->state |= dcb->active_srb->state; 2678 srb->state |= SRB_DATA_XFER; 2679 dcb->active_srb = srb; 2680 /* How can we make the DORS happy? */ 2681 return srb; 2682 2683 mingx0: 2684 srb = acb->tmp_srb; 2685 srb->state = SRB_UNEXPECT_RESEL; 2686 dcb->active_srb = srb; 2687 srb->msgout_buf[0] = MSG_ABORT_TAG; 2688 srb->msg_count = 1; 2689 DC395x_ENABLE_MSGOUT; 2690 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2691 return srb; 2692 } 2693 2694 2695 static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2696 struct DeviceCtlBlk *dcb) 2697 { 2698 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2699 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2700 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2701 set_xfer_rate(acb, dcb); 2702 } 2703 2704 2705 /* set async transfer mode */ 2706 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2707 { 2708 struct DeviceCtlBlk *dcb = srb->dcb; 2709 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2710 dcb->target_id, dcb->target_lun); 2711 2712 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2713 dcb->sync_mode |= SYNC_NEGO_DONE; 2714 /*dcb->sync_period &= 0; */ 2715 dcb->sync_offset = 0; 2716 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2717 srb->state &= ~SRB_DO_SYNC_NEGO; 2718 reprogram_regs(acb, dcb); 2719 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2720 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2721 build_wdtr(acb, dcb, srb); 2722 DC395x_ENABLE_MSGOUT; 2723 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2724 } 2725 } 2726 2727 2728 /* set sync transfer mode */ 2729 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2730 { 2731 struct DeviceCtlBlk *dcb = srb->dcb; 2732 u8 bval; 2733 int fact; 2734 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2735 "(%02i.%01i MHz) Offset %i\n", 2736 dcb->target_id, srb->msgin_buf[3] << 2, 2737 (250 / srb->msgin_buf[3]), 2738 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2739 srb->msgin_buf[4]); 2740 2741 if (srb->msgin_buf[4] > 15) 2742 srb->msgin_buf[4] = 15; 2743 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2744 dcb->sync_offset = 0; 2745 else if (dcb->sync_offset == 0) 2746 dcb->sync_offset = srb->msgin_buf[4]; 2747 if (srb->msgin_buf[4] > dcb->sync_offset) 2748 srb->msgin_buf[4] = dcb->sync_offset; 2749 else 2750 dcb->sync_offset = srb->msgin_buf[4]; 2751 bval = 0; 2752 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2753 || dcb->min_nego_period > 2754 clock_period[bval])) 2755 bval++; 2756 if (srb->msgin_buf[3] < clock_period[bval]) 2757 dprintkl(KERN_INFO, 2758 "msgin_set_sync: Increase sync nego period to %ins\n", 2759 clock_period[bval] << 2); 2760 srb->msgin_buf[3] = clock_period[bval]; 2761 dcb->sync_period &= 0xf0; 2762 dcb->sync_period |= ALT_SYNC | bval; 2763 dcb->min_nego_period = srb->msgin_buf[3]; 2764 2765 if (dcb->sync_period & WIDE_SYNC) 2766 fact = 500; 2767 else 2768 fact = 250; 2769 2770 dprintkl(KERN_INFO, 2771 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2772 dcb->target_id, (fact == 500) ? "Wide16" : "", 2773 dcb->min_nego_period << 2, dcb->sync_offset, 2774 (fact / dcb->min_nego_period), 2775 ((fact % dcb->min_nego_period) * 10 + 2776 dcb->min_nego_period / 2) / dcb->min_nego_period); 2777 2778 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2779 /* Reply with corrected SDTR Message */ 2780 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2781 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2782 2783 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2784 srb->msg_count = 5; 2785 DC395x_ENABLE_MSGOUT; 2786 dcb->sync_mode |= SYNC_NEGO_DONE; 2787 } else { 2788 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2789 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2790 build_wdtr(acb, dcb, srb); 2791 DC395x_ENABLE_MSGOUT; 2792 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2793 } 2794 } 2795 srb->state &= ~SRB_DO_SYNC_NEGO; 2796 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2797 2798 reprogram_regs(acb, dcb); 2799 } 2800 2801 2802 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2803 struct ScsiReqBlk *srb) 2804 { 2805 struct DeviceCtlBlk *dcb = srb->dcb; 2806 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2807 2808 dcb->sync_period &= ~WIDE_SYNC; 2809 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2810 dcb->sync_mode |= WIDE_NEGO_DONE; 2811 srb->state &= ~SRB_DO_WIDE_NEGO; 2812 reprogram_regs(acb, dcb); 2813 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2814 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2815 build_sdtr(acb, dcb, srb); 2816 DC395x_ENABLE_MSGOUT; 2817 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2818 } 2819 } 2820 2821 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2822 { 2823 struct DeviceCtlBlk *dcb = srb->dcb; 2824 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2825 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2826 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2827 2828 if (srb->msgin_buf[3] > wide) 2829 srb->msgin_buf[3] = wide; 2830 /* Completed */ 2831 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2832 dprintkl(KERN_DEBUG, 2833 "msgin_set_wide: Wide nego initiated <%02i>\n", 2834 dcb->target_id); 2835 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2836 srb->msg_count = 4; 2837 srb->state |= SRB_DO_WIDE_NEGO; 2838 DC395x_ENABLE_MSGOUT; 2839 } 2840 2841 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2842 if (srb->msgin_buf[3] > 0) 2843 dcb->sync_period |= WIDE_SYNC; 2844 else 2845 dcb->sync_period &= ~WIDE_SYNC; 2846 srb->state &= ~SRB_DO_WIDE_NEGO; 2847 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2848 dprintkdbg(DBG_1, 2849 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2850 (8 << srb->msgin_buf[3]), dcb->target_id); 2851 reprogram_regs(acb, dcb); 2852 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2853 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2854 build_sdtr(acb, dcb, srb); 2855 DC395x_ENABLE_MSGOUT; 2856 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2857 } 2858 } 2859 2860 2861 /* 2862 * extended message codes: 2863 * 2864 * code description 2865 * 2866 * 02h Reserved 2867 * 00h MODIFY DATA POINTER 2868 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2869 * 03h WIDE DATA TRANSFER REQUEST 2870 * 04h - 7Fh Reserved 2871 * 80h - FFh Vendor specific 2872 */ 2873 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2874 u16 *pscsi_status) 2875 { 2876 struct DeviceCtlBlk *dcb = acb->active_dcb; 2877 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid); 2878 2879 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2880 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2881 /* Now eval the msg */ 2882 switch (srb->msgin_buf[0]) { 2883 case DISCONNECT: 2884 srb->state = SRB_DISCONNECT; 2885 break; 2886 2887 case SIMPLE_QUEUE_TAG: 2888 case HEAD_OF_QUEUE_TAG: 2889 case ORDERED_QUEUE_TAG: 2890 srb = 2891 msgin_qtag(acb, dcb, 2892 srb->msgin_buf[1]); 2893 break; 2894 2895 case MESSAGE_REJECT: 2896 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2897 DO_CLRATN | DO_DATALATCH); 2898 /* A sync nego message was rejected ! */ 2899 if (srb->state & SRB_DO_SYNC_NEGO) { 2900 msgin_set_async(acb, srb); 2901 break; 2902 } 2903 /* A wide nego message was rejected ! */ 2904 if (srb->state & SRB_DO_WIDE_NEGO) { 2905 msgin_set_nowide(acb, srb); 2906 break; 2907 } 2908 enable_msgout_abort(acb, srb); 2909 /*srb->state |= SRB_ABORT_SENT */ 2910 break; 2911 2912 case EXTENDED_MESSAGE: 2913 /* SDTR */ 2914 if (srb->msgin_buf[1] == 3 2915 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2916 msgin_set_sync(acb, srb); 2917 break; 2918 } 2919 /* WDTR */ 2920 if (srb->msgin_buf[1] == 2 2921 && srb->msgin_buf[2] == EXTENDED_WDTR 2922 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2923 msgin_set_wide(acb, srb); 2924 break; 2925 } 2926 msgin_reject(acb, srb); 2927 break; 2928 2929 case MSG_IGNOREWIDE: 2930 /* Discard wide residual */ 2931 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2932 break; 2933 2934 case COMMAND_COMPLETE: 2935 /* nothing has to be done */ 2936 break; 2937 2938 case SAVE_POINTERS: 2939 /* 2940 * SAVE POINTER may be ignored as we have the struct 2941 * ScsiReqBlk* associated with the scsi command. 2942 */ 2943 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2944 "SAVE POINTER rem=%i Ignore\n", 2945 srb->cmd->pid, srb->total_xfer_length); 2946 break; 2947 2948 case RESTORE_POINTERS: 2949 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2950 break; 2951 2952 case ABORT: 2953 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2954 "<%02i-%i> ABORT msg\n", 2955 srb->cmd->pid, dcb->target_id, 2956 dcb->target_lun); 2957 dcb->flag |= ABORT_DEV_; 2958 enable_msgout_abort(acb, srb); 2959 break; 2960 2961 default: 2962 /* reject unknown messages */ 2963 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2964 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2965 srb->msg_count = 1; 2966 srb->msgout_buf[0] = dcb->identify_msg; 2967 DC395x_ENABLE_MSGOUT; 2968 srb->state |= SRB_MSGOUT; 2969 /*break; */ 2970 } 2971 msgin_reject(acb, srb); 2972 } 2973 2974 /* Clear counter and MsgIn state */ 2975 srb->state &= ~SRB_MSGIN; 2976 acb->msg_len = 0; 2977 } 2978 *pscsi_status = PH_BUS_FREE; 2979 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2980 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2981 } 2982 2983 2984 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2985 u16 *pscsi_status) 2986 { 2987 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid); 2988 clear_fifo(acb, "msgin_phase1"); 2989 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2990 if (!(srb->state & SRB_MSGIN)) { 2991 srb->state &= ~SRB_DISCONNECT; 2992 srb->state |= SRB_MSGIN; 2993 } 2994 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2995 /* SCSI command */ 2996 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2997 } 2998 2999 3000 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 3001 u16 *pscsi_status) 3002 { 3003 } 3004 3005 3006 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 3007 u16 *pscsi_status) 3008 { 3009 } 3010 3011 3012 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3013 { 3014 struct DeviceCtlBlk *i; 3015 3016 /* set all lun device's period, offset */ 3017 if (dcb->identify_msg & 0x07) 3018 return; 3019 3020 if (acb->scan_devices) { 3021 current_sync_offset = dcb->sync_offset; 3022 return; 3023 } 3024 3025 list_for_each_entry(i, &acb->dcb_list, list) 3026 if (i->target_id == dcb->target_id) { 3027 i->sync_period = dcb->sync_period; 3028 i->sync_offset = dcb->sync_offset; 3029 i->sync_mode = dcb->sync_mode; 3030 i->min_nego_period = dcb->min_nego_period; 3031 } 3032 } 3033 3034 3035 static void disconnect(struct AdapterCtlBlk *acb) 3036 { 3037 struct DeviceCtlBlk *dcb = acb->active_dcb; 3038 struct ScsiReqBlk *srb; 3039 3040 if (!dcb) { 3041 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3042 udelay(500); 3043 /* Suspend queue for a while */ 3044 acb->scsi_host->last_reset = 3045 jiffies + HZ / 2 + 3046 HZ * acb->eeprom.delay_time; 3047 clear_fifo(acb, "disconnectEx"); 3048 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3049 return; 3050 } 3051 srb = dcb->active_srb; 3052 acb->active_dcb = NULL; 3053 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid); 3054 3055 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3056 clear_fifo(acb, "disconnect"); 3057 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3058 if (srb->state & SRB_UNEXPECT_RESEL) { 3059 dprintkl(KERN_ERR, 3060 "disconnect: Unexpected reselection <%02i-%i>\n", 3061 dcb->target_id, dcb->target_lun); 3062 srb->state = 0; 3063 waiting_process_next(acb); 3064 } else if (srb->state & SRB_ABORT_SENT) { 3065 dcb->flag &= ~ABORT_DEV_; 3066 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; 3067 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3068 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3069 waiting_process_next(acb); 3070 } else { 3071 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3072 || !(srb-> 3073 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3074 /* 3075 * Selection time out 3076 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3077 */ 3078 /* Unexp. Disc / Sel Timeout */ 3079 if (srb->state != SRB_START_ 3080 && srb->state != SRB_MSGOUT) { 3081 srb->state = SRB_READY; 3082 dprintkl(KERN_DEBUG, 3083 "disconnect: (pid#%li) Unexpected\n", 3084 srb->cmd->pid); 3085 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3086 goto disc1; 3087 } else { 3088 /* Normal selection timeout */ 3089 dprintkdbg(DBG_KG, "disconnect: (pid#%li) " 3090 "<%02i-%i> SelTO\n", srb->cmd->pid, 3091 dcb->target_id, dcb->target_lun); 3092 if (srb->retry_count++ > DC395x_MAX_RETRIES 3093 || acb->scan_devices) { 3094 srb->target_status = 3095 SCSI_STAT_SEL_TIMEOUT; 3096 goto disc1; 3097 } 3098 free_tag(dcb, srb); 3099 srb_going_to_waiting_move(dcb, srb); 3100 dprintkdbg(DBG_KG, 3101 "disconnect: (pid#%li) Retry\n", 3102 srb->cmd->pid); 3103 waiting_set_timer(acb, HZ / 20); 3104 } 3105 } else if (srb->state & SRB_DISCONNECT) { 3106 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3107 /* 3108 * SRB_DISCONNECT (This is what we expect!) 3109 */ 3110 if (bval & 0x40) { 3111 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3112 " 0x%02x: ACK set! Other controllers?\n", 3113 bval); 3114 /* It could come from another initiator, therefore don't do much ! */ 3115 } else 3116 waiting_process_next(acb); 3117 } else if (srb->state & SRB_COMPLETED) { 3118 disc1: 3119 /* 3120 ** SRB_COMPLETED 3121 */ 3122 free_tag(dcb, srb); 3123 dcb->active_srb = NULL; 3124 srb->state = SRB_FREE; 3125 srb_done(acb, dcb, srb); 3126 } 3127 } 3128 } 3129 3130 3131 static void reselect(struct AdapterCtlBlk *acb) 3132 { 3133 struct DeviceCtlBlk *dcb = acb->active_dcb; 3134 struct ScsiReqBlk *srb = NULL; 3135 u16 rsel_tar_lun_id; 3136 u8 id, lun; 3137 u8 arblostflag = 0; 3138 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3139 3140 clear_fifo(acb, "reselect"); 3141 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3142 /* Read Reselected Target ID and LUN */ 3143 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3144 if (dcb) { /* Arbitration lost but Reselection win */ 3145 srb = dcb->active_srb; 3146 if (!srb) { 3147 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3148 "but active_srb == NULL\n"); 3149 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3150 return; 3151 } 3152 /* Why the if ? */ 3153 if (!acb->scan_devices) { 3154 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " 3155 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3156 srb->cmd->pid, dcb->target_id, 3157 dcb->target_lun, rsel_tar_lun_id, 3158 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3159 arblostflag = 1; 3160 /*srb->state |= SRB_DISCONNECT; */ 3161 3162 srb->state = SRB_READY; 3163 free_tag(dcb, srb); 3164 srb_going_to_waiting_move(dcb, srb); 3165 waiting_set_timer(acb, HZ / 20); 3166 3167 /* return; */ 3168 } 3169 } 3170 /* Read Reselected Target Id and LUN */ 3171 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3172 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3173 "Got %i!\n", rsel_tar_lun_id); 3174 id = rsel_tar_lun_id & 0xff; 3175 lun = (rsel_tar_lun_id >> 8) & 7; 3176 dcb = find_dcb(acb, id, lun); 3177 if (!dcb) { 3178 dprintkl(KERN_ERR, "reselect: From non existent device " 3179 "<%02i-%i>\n", id, lun); 3180 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3181 return; 3182 } 3183 acb->active_dcb = dcb; 3184 3185 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3186 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3187 "disconnection? <%02i-%i>\n", 3188 dcb->target_id, dcb->target_lun); 3189 3190 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3191 srb = acb->tmp_srb; 3192 dcb->active_srb = srb; 3193 } else { 3194 /* There can be only one! */ 3195 srb = dcb->active_srb; 3196 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3197 /* 3198 * abort command 3199 */ 3200 dprintkl(KERN_DEBUG, 3201 "reselect: w/o disconnected cmds <%02i-%i>\n", 3202 dcb->target_id, dcb->target_lun); 3203 srb = acb->tmp_srb; 3204 srb->state = SRB_UNEXPECT_RESEL; 3205 dcb->active_srb = srb; 3206 enable_msgout_abort(acb, srb); 3207 } else { 3208 if (dcb->flag & ABORT_DEV_) { 3209 /*srb->state = SRB_ABORT_SENT; */ 3210 enable_msgout_abort(acb, srb); 3211 } else 3212 srb->state = SRB_DATA_XFER; 3213 3214 } 3215 } 3216 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3217 3218 /* Program HA ID, target ID, period and offset */ 3219 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3220 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3221 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3222 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3223 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3224 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3225 /* SCSI command */ 3226 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3227 } 3228 3229 3230 static inline u8 tagq_blacklist(char *name) 3231 { 3232 #ifndef DC395x_NO_TAGQ 3233 #if 0 3234 u8 i; 3235 for (i = 0; i < BADDEVCNT; i++) 3236 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3237 return 1; 3238 #endif 3239 return 0; 3240 #else 3241 return 1; 3242 #endif 3243 } 3244 3245 3246 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3247 { 3248 /* Check for SCSI format (ANSI and Response data format) */ 3249 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3250 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3251 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3252 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3253 /* ((dcb->dev_type == TYPE_DISK) 3254 || (dcb->dev_type == TYPE_MOD)) && */ 3255 !tagq_blacklist(((char *)ptr) + 8)) { 3256 if (dcb->max_command == 1) 3257 dcb->max_command = 3258 dcb->acb->tag_max_num; 3259 dcb->sync_mode |= EN_TAG_QUEUEING; 3260 /*dcb->tag_mask = 0; */ 3261 } else 3262 dcb->max_command = 1; 3263 } 3264 } 3265 3266 3267 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3268 struct ScsiInqData *ptr) 3269 { 3270 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3271 dcb->dev_type = bval1; 3272 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3273 disc_tagq_set(dcb, ptr); 3274 } 3275 3276 3277 /* unmap mapped pci regions from SRB */ 3278 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3279 { 3280 struct scsi_cmnd *cmd = srb->cmd; 3281 enum dma_data_direction dir = cmd->sc_data_direction; 3282 if (cmd->use_sg && dir != PCI_DMA_NONE) { 3283 /* unmap DC395x SG list */ 3284 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3285 srb->sg_bus_addr, SEGMENTX_LEN); 3286 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3287 SEGMENTX_LEN, 3288 PCI_DMA_TODEVICE); 3289 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3290 cmd->use_sg, cmd->request_buffer); 3291 /* unmap the sg segments */ 3292 pci_unmap_sg(acb->dev, 3293 (struct scatterlist *)cmd->request_buffer, 3294 cmd->use_sg, dir); 3295 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { 3296 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", 3297 srb->segment_x[0].address, cmd->request_bufflen); 3298 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3299 cmd->request_bufflen, dir); 3300 } 3301 } 3302 3303 3304 /* unmap mapped pci sense buffer from SRB */ 3305 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3306 struct ScsiReqBlk *srb) 3307 { 3308 if (!(srb->flag & AUTO_REQSENSE)) 3309 return; 3310 /* Unmap sense buffer */ 3311 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3312 srb->segment_x[0].address); 3313 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3314 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3315 /* Restore SG stuff */ 3316 srb->total_xfer_length = srb->xferred; 3317 srb->segment_x[0].address = 3318 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3319 srb->segment_x[0].length = 3320 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3321 } 3322 3323 3324 /* 3325 * Complete execution of a SCSI command 3326 * Signal completion to the generic SCSI driver 3327 */ 3328 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3329 struct ScsiReqBlk *srb) 3330 { 3331 u8 tempcnt, status; 3332 struct scsi_cmnd *cmd = srb->cmd; 3333 struct ScsiInqData *ptr; 3334 enum dma_data_direction dir = cmd->sc_data_direction; 3335 3336 if (cmd->use_sg) { 3337 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; 3338 ptr = (struct ScsiInqData *)(page_address(sg->page) + sg->offset); 3339 } else { 3340 ptr = (struct ScsiInqData *)(cmd->request_buffer); 3341 } 3342 3343 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, 3344 srb->cmd->device->id, srb->cmd->device->lun); 3345 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n", 3346 srb, cmd->use_sg, srb->sg_index, srb->sg_count, 3347 cmd->request_buffer, ptr); 3348 status = srb->target_status; 3349 if (srb->flag & AUTO_REQSENSE) { 3350 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3351 pci_unmap_srb_sense(acb, srb); 3352 /* 3353 ** target status.......................... 3354 */ 3355 srb->flag &= ~AUTO_REQSENSE; 3356 srb->adapter_status = 0; 3357 srb->target_status = CHECK_CONDITION << 1; 3358 if (debug_enabled(DBG_1)) { 3359 switch (cmd->sense_buffer[2] & 0x0f) { 3360 case NOT_READY: 3361 dprintkl(KERN_DEBUG, 3362 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3363 cmd->cmnd[0], dcb->target_id, 3364 dcb->target_lun, status, acb->scan_devices); 3365 break; 3366 case UNIT_ATTENTION: 3367 dprintkl(KERN_DEBUG, 3368 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3369 cmd->cmnd[0], dcb->target_id, 3370 dcb->target_lun, status, acb->scan_devices); 3371 break; 3372 case ILLEGAL_REQUEST: 3373 dprintkl(KERN_DEBUG, 3374 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3375 cmd->cmnd[0], dcb->target_id, 3376 dcb->target_lun, status, acb->scan_devices); 3377 break; 3378 case MEDIUM_ERROR: 3379 dprintkl(KERN_DEBUG, 3380 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3381 cmd->cmnd[0], dcb->target_id, 3382 dcb->target_lun, status, acb->scan_devices); 3383 break; 3384 case HARDWARE_ERROR: 3385 dprintkl(KERN_DEBUG, 3386 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3387 cmd->cmnd[0], dcb->target_id, 3388 dcb->target_lun, status, acb->scan_devices); 3389 break; 3390 } 3391 if (cmd->sense_buffer[7] >= 6) 3392 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3393 "(0x%08x 0x%08x)\n", 3394 cmd->sense_buffer[2], cmd->sense_buffer[12], 3395 cmd->sense_buffer[13], 3396 *((unsigned int *)(cmd->sense_buffer + 3)), 3397 *((unsigned int *)(cmd->sense_buffer + 8))); 3398 else 3399 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3400 cmd->sense_buffer[2], 3401 *((unsigned int *)(cmd->sense_buffer + 3))); 3402 } 3403 3404 if (status == (CHECK_CONDITION << 1)) { 3405 cmd->result = DID_BAD_TARGET << 16; 3406 goto ckc_e; 3407 } 3408 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3409 3410 if (srb->total_xfer_length 3411 && srb->total_xfer_length >= cmd->underflow) 3412 cmd->result = 3413 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3414 srb->end_message, CHECK_CONDITION); 3415 /*SET_RES_DID(cmd->result,DID_OK) */ 3416 else 3417 cmd->result = 3418 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3419 srb->end_message, CHECK_CONDITION); 3420 3421 goto ckc_e; 3422 } 3423 3424 /*************************************************************/ 3425 if (status) { 3426 /* 3427 * target status.......................... 3428 */ 3429 if (status_byte(status) == CHECK_CONDITION) { 3430 request_sense(acb, dcb, srb); 3431 return; 3432 } else if (status_byte(status) == QUEUE_FULL) { 3433 tempcnt = (u8)list_size(&dcb->srb_going_list); 3434 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3435 dcb->target_id, dcb->target_lun, tempcnt); 3436 if (tempcnt > 1) 3437 tempcnt--; 3438 dcb->max_command = tempcnt; 3439 free_tag(dcb, srb); 3440 srb_going_to_waiting_move(dcb, srb); 3441 waiting_set_timer(acb, HZ / 20); 3442 srb->adapter_status = 0; 3443 srb->target_status = 0; 3444 return; 3445 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3446 srb->adapter_status = H_SEL_TIMEOUT; 3447 srb->target_status = 0; 3448 cmd->result = DID_NO_CONNECT << 16; 3449 } else { 3450 srb->adapter_status = 0; 3451 SET_RES_DID(cmd->result, DID_ERROR); 3452 SET_RES_MSG(cmd->result, srb->end_message); 3453 SET_RES_TARGET(cmd->result, status); 3454 3455 } 3456 } else { 3457 /* 3458 ** process initiator status.......................... 3459 */ 3460 status = srb->adapter_status; 3461 if (status & H_OVER_UNDER_RUN) { 3462 srb->target_status = 0; 3463 SET_RES_DID(cmd->result, DID_OK); 3464 SET_RES_MSG(cmd->result, srb->end_message); 3465 } else if (srb->status & PARITY_ERROR) { 3466 SET_RES_DID(cmd->result, DID_PARITY); 3467 SET_RES_MSG(cmd->result, srb->end_message); 3468 } else { /* No error */ 3469 3470 srb->adapter_status = 0; 3471 srb->target_status = 0; 3472 SET_RES_DID(cmd->result, DID_OK); 3473 } 3474 } 3475 3476 if (dir != PCI_DMA_NONE) { 3477 if (cmd->use_sg) 3478 pci_dma_sync_sg_for_cpu(acb->dev, 3479 (struct scatterlist *)cmd-> 3480 request_buffer, cmd->use_sg, dir); 3481 else if (cmd->request_buffer) 3482 pci_dma_sync_single_for_cpu(acb->dev, 3483 srb->segment_x[0].address, 3484 cmd->request_bufflen, dir); 3485 } 3486 3487 if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY 3488 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 3489 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3490 dcb->inquiry7 = ptr->Flags; 3491 /* Check Error Conditions */ 3492 ckc_e: 3493 3494 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3495 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3496 if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16) 3497 || status_byte(cmd-> 3498 result) & 3499 CHECK_CONDITION)) { 3500 3501 if (!dcb->init_tcq_flag) { 3502 add_dev(acb, dcb, ptr); 3503 dcb->init_tcq_flag = 1; 3504 } 3505 3506 } 3507 3508 3509 /* Here is the info for Doug Gilbert's sg3 ... */ 3510 cmd->resid = srb->total_xfer_length; 3511 /* This may be interpreted by sb. or not ... */ 3512 cmd->SCp.this_residual = srb->total_xfer_length; 3513 cmd->SCp.buffers_residual = 0; 3514 if (debug_enabled(DBG_KG)) { 3515 if (srb->total_xfer_length) 3516 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " 3517 "cmnd=0x%02x Missed %i bytes\n", 3518 cmd->pid, cmd->device->id, cmd->device->lun, 3519 cmd->cmnd[0], srb->total_xfer_length); 3520 } 3521 3522 srb_going_remove(dcb, srb); 3523 /* Add to free list */ 3524 if (srb == acb->tmp_srb) 3525 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3526 else { 3527 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", 3528 cmd->pid, cmd->result); 3529 srb_free_insert(acb, srb); 3530 } 3531 pci_unmap_srb(acb, srb); 3532 3533 cmd->scsi_done(cmd); 3534 waiting_process_next(acb); 3535 } 3536 3537 3538 /* abort all cmds in our queues */ 3539 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3540 struct scsi_cmnd *cmd, u8 force) 3541 { 3542 struct DeviceCtlBlk *dcb; 3543 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3544 3545 list_for_each_entry(dcb, &acb->dcb_list, list) { 3546 struct ScsiReqBlk *srb; 3547 struct ScsiReqBlk *tmp; 3548 struct scsi_cmnd *p; 3549 3550 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3551 enum dma_data_direction dir; 3552 int result; 3553 3554 p = srb->cmd; 3555 dir = p->sc_data_direction; 3556 result = MK_RES(0, did_flag, 0, 0); 3557 printk("G:%li(%02i-%i) ", p->pid, 3558 p->device->id, p->device->lun); 3559 srb_going_remove(dcb, srb); 3560 free_tag(dcb, srb); 3561 srb_free_insert(acb, srb); 3562 p->result = result; 3563 pci_unmap_srb_sense(acb, srb); 3564 pci_unmap_srb(acb, srb); 3565 if (force) { 3566 /* For new EH, we normally don't need to give commands back, 3567 * as they all complete or all time out */ 3568 p->scsi_done(p); 3569 } 3570 } 3571 if (!list_empty(&dcb->srb_going_list)) 3572 dprintkl(KERN_DEBUG, 3573 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3574 dcb->target_id, dcb->target_lun); 3575 if (dcb->tag_mask) 3576 dprintkl(KERN_DEBUG, 3577 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3578 dcb->target_id, dcb->target_lun, 3579 dcb->tag_mask); 3580 3581 /* Waiting queue */ 3582 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3583 int result; 3584 p = srb->cmd; 3585 3586 result = MK_RES(0, did_flag, 0, 0); 3587 printk("W:%li<%02i-%i>", p->pid, p->device->id, 3588 p->device->lun); 3589 srb_waiting_remove(dcb, srb); 3590 srb_free_insert(acb, srb); 3591 p->result = result; 3592 pci_unmap_srb_sense(acb, srb); 3593 pci_unmap_srb(acb, srb); 3594 if (force) { 3595 /* For new EH, we normally don't need to give commands back, 3596 * as they all complete or all time out */ 3597 cmd->scsi_done(cmd); 3598 } 3599 } 3600 if (!list_empty(&dcb->srb_waiting_list)) 3601 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3602 list_size(&dcb->srb_waiting_list), dcb->target_id, 3603 dcb->target_lun); 3604 dcb->flag &= ~ABORT_DEV_; 3605 } 3606 printk("\n"); 3607 } 3608 3609 3610 static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3611 { 3612 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3613 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3614 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3615 3616 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3617 /* nothing */; 3618 } 3619 3620 3621 static void set_basic_config(struct AdapterCtlBlk *acb) 3622 { 3623 u8 bval; 3624 u16 wval; 3625 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3626 if (acb->config & HCC_PARITY) 3627 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3628 else 3629 bval = PHASELATCH | INITIATOR | BLOCKRST; 3630 3631 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3632 3633 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3634 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3635 /* program Host ID */ 3636 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3637 /* set ansynchronous transfer */ 3638 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3639 /* Turn LED control off */ 3640 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3641 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3642 /* DMA config */ 3643 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3644 wval |= 3645 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3646 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3647 /* Clear pending interrupt status */ 3648 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3649 /* Enable SCSI interrupt */ 3650 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3651 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3652 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3653 ); 3654 } 3655 3656 3657 static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3658 { 3659 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3660 /* delay half a second */ 3661 if (timer_pending(&acb->waiting_timer)) 3662 del_timer(&acb->waiting_timer); 3663 3664 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3665 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3666 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3667 udelay(500); 3668 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3669 acb->scsi_host->last_reset = 3670 jiffies + 5 * HZ / 2 + 3671 HZ * acb->eeprom.delay_time; 3672 3673 clear_fifo(acb, "scsi_reset_detect"); 3674 set_basic_config(acb); 3675 /*1.25 */ 3676 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3677 3678 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3679 acb->acb_flag |= RESET_DONE; 3680 } else { 3681 acb->acb_flag |= RESET_DETECT; 3682 reset_dev_param(acb); 3683 doing_srb_done(acb, DID_RESET, NULL, 1); 3684 /*DC395x_RecoverSRB( acb ); */ 3685 acb->active_dcb = NULL; 3686 acb->acb_flag = 0; 3687 waiting_process_next(acb); 3688 } 3689 } 3690 3691 3692 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3693 struct ScsiReqBlk *srb) 3694 { 3695 struct scsi_cmnd *cmd = srb->cmd; 3696 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", 3697 cmd->pid, cmd->device->id, cmd->device->lun); 3698 3699 srb->flag |= AUTO_REQSENSE; 3700 srb->adapter_status = 0; 3701 srb->target_status = 0; 3702 3703 /* KG: Can this prevent crap sense data ? */ 3704 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 3705 3706 /* Save some data */ 3707 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3708 srb->segment_x[0].address; 3709 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3710 srb->segment_x[0].length; 3711 srb->xferred = srb->total_xfer_length; 3712 /* srb->segment_x : a one entry of S/G list table */ 3713 srb->total_xfer_length = sizeof(cmd->sense_buffer); 3714 srb->segment_x[0].length = sizeof(cmd->sense_buffer); 3715 /* Map sense buffer */ 3716 srb->segment_x[0].address = 3717 pci_map_single(acb->dev, cmd->sense_buffer, 3718 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE); 3719 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3720 cmd->sense_buffer, srb->segment_x[0].address, 3721 sizeof(cmd->sense_buffer)); 3722 srb->sg_count = 1; 3723 srb->sg_index = 0; 3724 3725 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3726 dprintkl(KERN_DEBUG, 3727 "request_sense: (pid#%li) failed <%02i-%i>\n", 3728 srb->cmd->pid, dcb->target_id, dcb->target_lun); 3729 srb_going_to_waiting_move(dcb, srb); 3730 waiting_set_timer(acb, HZ / 100); 3731 } 3732 } 3733 3734 3735 /** 3736 * device_alloc - Allocate a new device instance. This create the 3737 * devices instance and sets up all the data items. The adapter 3738 * instance is required to obtain confiuration information for this 3739 * device. This does *not* add this device to the adapters device 3740 * list. 3741 * 3742 * @acb: The adapter to obtain configuration information from. 3743 * @target: The target for the new device. 3744 * @lun: The lun for the new device. 3745 * 3746 * Return the new device if succesfull or NULL on failure. 3747 **/ 3748 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3749 u8 target, u8 lun) 3750 { 3751 struct NvRamType *eeprom = &acb->eeprom; 3752 u8 period_index = eeprom->target[target].period & 0x07; 3753 struct DeviceCtlBlk *dcb; 3754 3755 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3756 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3757 if (!dcb) 3758 return NULL; 3759 dcb->acb = NULL; 3760 INIT_LIST_HEAD(&dcb->srb_going_list); 3761 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3762 dcb->active_srb = NULL; 3763 dcb->tag_mask = 0; 3764 dcb->max_command = 1; 3765 dcb->target_id = target; 3766 dcb->target_lun = lun; 3767 #ifndef DC395x_NO_DISCONNECT 3768 dcb->identify_msg = 3769 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3770 #else 3771 dcb->identify_msg = IDENTIFY(0, lun); 3772 #endif 3773 dcb->dev_mode = eeprom->target[target].cfg0; 3774 dcb->inquiry7 = 0; 3775 dcb->sync_mode = 0; 3776 dcb->min_nego_period = clock_period[period_index]; 3777 dcb->sync_period = 0; 3778 dcb->sync_offset = 0; 3779 dcb->flag = 0; 3780 3781 #ifndef DC395x_NO_WIDE 3782 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3783 && (acb->config & HCC_WIDE_CARD)) 3784 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3785 #endif 3786 #ifndef DC395x_NO_SYNC 3787 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3788 if (!(lun) || current_sync_offset) 3789 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3790 #endif 3791 if (dcb->target_lun != 0) { 3792 /* Copy settings */ 3793 struct DeviceCtlBlk *p; 3794 list_for_each_entry(p, &acb->dcb_list, list) 3795 if (p->target_id == dcb->target_id) 3796 break; 3797 dprintkdbg(DBG_1, 3798 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3799 dcb->target_id, dcb->target_lun, 3800 p->target_id, p->target_lun); 3801 dcb->sync_mode = p->sync_mode; 3802 dcb->sync_period = p->sync_period; 3803 dcb->min_nego_period = p->min_nego_period; 3804 dcb->sync_offset = p->sync_offset; 3805 dcb->inquiry7 = p->inquiry7; 3806 } 3807 return dcb; 3808 } 3809 3810 3811 /** 3812 * adapter_add_device - Adds the device instance to the adaptor instance. 3813 * 3814 * @acb: The adapter device to be updated 3815 * @dcb: A newly created and intialised device instance to add. 3816 **/ 3817 static void adapter_add_device(struct AdapterCtlBlk *acb, 3818 struct DeviceCtlBlk *dcb) 3819 { 3820 /* backpointer to adapter */ 3821 dcb->acb = acb; 3822 3823 /* set run_robin to this device if it is currently empty */ 3824 if (list_empty(&acb->dcb_list)) 3825 acb->dcb_run_robin = dcb; 3826 3827 /* add device to list */ 3828 list_add_tail(&dcb->list, &acb->dcb_list); 3829 3830 /* update device maps */ 3831 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3832 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3833 } 3834 3835 3836 /** 3837 * adapter_remove_device - Removes the device instance from the adaptor 3838 * instance. The device instance is not check in any way or freed by this. 3839 * The caller is expected to take care of that. This will simply remove the 3840 * device from the adapters data strcutures. 3841 * 3842 * @acb: The adapter device to be updated 3843 * @dcb: A device that has previously been added to the adapter. 3844 **/ 3845 static void adapter_remove_device(struct AdapterCtlBlk *acb, 3846 struct DeviceCtlBlk *dcb) 3847 { 3848 struct DeviceCtlBlk *i; 3849 struct DeviceCtlBlk *tmp; 3850 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3851 dcb->target_id, dcb->target_lun); 3852 3853 /* fix up any pointers to this device that we have in the adapter */ 3854 if (acb->active_dcb == dcb) 3855 acb->active_dcb = NULL; 3856 if (acb->dcb_run_robin == dcb) 3857 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3858 3859 /* unlink from list */ 3860 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3861 if (dcb == i) { 3862 list_del(&i->list); 3863 break; 3864 } 3865 3866 /* clear map and children */ 3867 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3868 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3869 dcb->acb = NULL; 3870 } 3871 3872 3873 /** 3874 * adapter_remove_and_free_device - Removes a single device from the adapter 3875 * and then frees the device information. 3876 * 3877 * @acb: The adapter device to be updated 3878 * @dcb: A device that has previously been added to the adapter. 3879 */ 3880 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3881 struct DeviceCtlBlk *dcb) 3882 { 3883 if (list_size(&dcb->srb_going_list) > 1) { 3884 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3885 "Won't remove because of %i active requests.\n", 3886 dcb->target_id, dcb->target_lun, 3887 list_size(&dcb->srb_going_list)); 3888 return; 3889 } 3890 adapter_remove_device(acb, dcb); 3891 kfree(dcb); 3892 } 3893 3894 3895 /** 3896 * adapter_remove_and_free_all_devices - Removes and frees all of the 3897 * devices associated with the specified adapter. 3898 * 3899 * @acb: The adapter from which all devices should be removed. 3900 **/ 3901 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3902 { 3903 struct DeviceCtlBlk *dcb; 3904 struct DeviceCtlBlk *tmp; 3905 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3906 list_size(&acb->dcb_list)); 3907 3908 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3909 adapter_remove_and_free_device(acb, dcb); 3910 } 3911 3912 3913 /** 3914 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3915 * scsi device that we need to deal with. We allocate a new device and then 3916 * insert that device into the adapters device list. 3917 * 3918 * @scsi_device: The new scsi device that we need to handle. 3919 **/ 3920 static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3921 { 3922 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3923 struct DeviceCtlBlk *dcb; 3924 3925 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3926 if (!dcb) 3927 return -ENOMEM; 3928 adapter_add_device(acb, dcb); 3929 3930 return 0; 3931 } 3932 3933 3934 /** 3935 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3936 * device that is going away. 3937 * 3938 * @scsi_device: The new scsi device that we need to handle. 3939 **/ 3940 static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3941 { 3942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3943 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3944 if (dcb) 3945 adapter_remove_and_free_device(acb, dcb); 3946 } 3947 3948 3949 3950 3951 /** 3952 * trms1040_wait_30us: wait for 30 us 3953 * 3954 * Waits for 30us (using the chip by the looks of it..) 3955 * 3956 * @io_port: base I/O address 3957 **/ 3958 static void __devinit trms1040_wait_30us(unsigned long io_port) 3959 { 3960 /* ScsiPortStallExecution(30); wait 30 us */ 3961 outb(5, io_port + TRM_S1040_GEN_TIMER); 3962 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3963 /* nothing */ ; 3964 } 3965 3966 3967 /** 3968 * trms1040_write_cmd - write the secified command and address to 3969 * chip 3970 * 3971 * @io_port: base I/O address 3972 * @cmd: SB + op code (command) to send 3973 * @addr: address to send 3974 **/ 3975 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3976 { 3977 int i; 3978 u8 send_data; 3979 3980 /* program SB + OP code */ 3981 for (i = 0; i < 3; i++, cmd <<= 1) { 3982 send_data = NVR_SELECT; 3983 if (cmd & 0x04) /* Start from bit 2 */ 3984 send_data |= NVR_BITOUT; 3985 3986 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3987 trms1040_wait_30us(io_port); 3988 outb((send_data | NVR_CLOCK), 3989 io_port + TRM_S1040_GEN_NVRAM); 3990 trms1040_wait_30us(io_port); 3991 } 3992 3993 /* send address */ 3994 for (i = 0; i < 7; i++, addr <<= 1) { 3995 send_data = NVR_SELECT; 3996 if (addr & 0x40) /* Start from bit 6 */ 3997 send_data |= NVR_BITOUT; 3998 3999 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4000 trms1040_wait_30us(io_port); 4001 outb((send_data | NVR_CLOCK), 4002 io_port + TRM_S1040_GEN_NVRAM); 4003 trms1040_wait_30us(io_port); 4004 } 4005 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4006 trms1040_wait_30us(io_port); 4007 } 4008 4009 4010 /** 4011 * trms1040_set_data - store a single byte in the eeprom 4012 * 4013 * Called from write all to write a single byte into the SSEEPROM 4014 * Which is done one bit at a time. 4015 * 4016 * @io_port: base I/O address 4017 * @addr: offset into EEPROM 4018 * @byte: bytes to write 4019 **/ 4020 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4021 { 4022 int i; 4023 u8 send_data; 4024 4025 /* Send write command & address */ 4026 trms1040_write_cmd(io_port, 0x05, addr); 4027 4028 /* Write data */ 4029 for (i = 0; i < 8; i++, byte <<= 1) { 4030 send_data = NVR_SELECT; 4031 if (byte & 0x80) /* Start from bit 7 */ 4032 send_data |= NVR_BITOUT; 4033 4034 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4035 trms1040_wait_30us(io_port); 4036 outb((send_data | 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 /* Disable chip select */ 4043 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4044 trms1040_wait_30us(io_port); 4045 4046 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4047 trms1040_wait_30us(io_port); 4048 4049 /* Wait for write ready */ 4050 while (1) { 4051 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4052 trms1040_wait_30us(io_port); 4053 4054 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4055 trms1040_wait_30us(io_port); 4056 4057 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4058 break; 4059 } 4060 4061 /* Disable chip select */ 4062 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4063 } 4064 4065 4066 /** 4067 * trms1040_write_all - write 128 bytes to the eeprom 4068 * 4069 * Write the supplied 128 bytes to the chips SEEPROM 4070 * 4071 * @eeprom: the data to write 4072 * @io_port: the base io port 4073 **/ 4074 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4075 { 4076 u8 *b_eeprom = (u8 *)eeprom; 4077 u8 addr; 4078 4079 /* Enable SEEPROM */ 4080 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4081 io_port + TRM_S1040_GEN_CONTROL); 4082 4083 /* write enable */ 4084 trms1040_write_cmd(io_port, 0x04, 0xFF); 4085 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4086 trms1040_wait_30us(io_port); 4087 4088 /* write */ 4089 for (addr = 0; addr < 128; addr++, b_eeprom++) 4090 trms1040_set_data(io_port, addr, *b_eeprom); 4091 4092 /* write disable */ 4093 trms1040_write_cmd(io_port, 0x04, 0x00); 4094 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4095 trms1040_wait_30us(io_port); 4096 4097 /* Disable SEEPROM */ 4098 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4099 io_port + TRM_S1040_GEN_CONTROL); 4100 } 4101 4102 4103 /** 4104 * trms1040_get_data - get a single byte from the eeprom 4105 * 4106 * Called from read all to read a single byte into the SSEEPROM 4107 * Which is done one bit at a time. 4108 * 4109 * @io_port: base I/O address 4110 * @addr: offset into SEEPROM 4111 * 4112 * Returns the the byte read. 4113 **/ 4114 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) 4115 { 4116 int i; 4117 u8 read_byte; 4118 u8 result = 0; 4119 4120 /* Send read command & address */ 4121 trms1040_write_cmd(io_port, 0x06, addr); 4122 4123 /* read data */ 4124 for (i = 0; i < 8; i++) { 4125 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4126 trms1040_wait_30us(io_port); 4127 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4128 4129 /* Get data bit while falling edge */ 4130 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4131 result <<= 1; 4132 if (read_byte & NVR_BITIN) 4133 result |= 1; 4134 4135 trms1040_wait_30us(io_port); 4136 } 4137 4138 /* Disable chip select */ 4139 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4140 return result; 4141 } 4142 4143 4144 /** 4145 * trms1040_read_all - read all bytes from the eeprom 4146 * 4147 * Read the 128 bytes from the SEEPROM. 4148 * 4149 * @eeprom: where to store the data 4150 * @io_port: the base io port 4151 **/ 4152 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4153 { 4154 u8 *b_eeprom = (u8 *)eeprom; 4155 u8 addr; 4156 4157 /* Enable SEEPROM */ 4158 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4159 io_port + TRM_S1040_GEN_CONTROL); 4160 4161 /* read details */ 4162 for (addr = 0; addr < 128; addr++, b_eeprom++) 4163 *b_eeprom = trms1040_get_data(io_port, addr); 4164 4165 /* Disable SEEPROM */ 4166 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4167 io_port + TRM_S1040_GEN_CONTROL); 4168 } 4169 4170 4171 4172 /** 4173 * check_eeprom - get and check contents of the eeprom 4174 * 4175 * Read seeprom 128 bytes into the memory provider in eeprom. 4176 * Checks the checksum and if it's not correct it uses a set of default 4177 * values. 4178 * 4179 * @eeprom: caller allocated strcuture to read the eeprom data into 4180 * @io_port: io port to read from 4181 **/ 4182 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4183 { 4184 u16 *w_eeprom = (u16 *)eeprom; 4185 u16 w_addr; 4186 u16 cksum; 4187 u32 d_addr; 4188 u32 *d_eeprom; 4189 4190 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4191 4192 cksum = 0; 4193 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4194 w_addr++, w_eeprom++) 4195 cksum += *w_eeprom; 4196 if (cksum != 0x1234) { 4197 /* 4198 * Checksum is wrong. 4199 * Load a set of defaults into the eeprom buffer 4200 */ 4201 dprintkl(KERN_WARNING, 4202 "EEProm checksum error: using default values and options.\n"); 4203 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4204 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4205 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4206 eeprom->sub_sys_id[1] = 4207 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4208 eeprom->sub_class = 0x00; 4209 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4210 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4211 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4212 eeprom->device_id[1] = 4213 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4214 eeprom->reserved = 0x00; 4215 4216 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4217 d_addr < 16; d_addr++, d_eeprom++) 4218 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4219 4220 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4221 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4222 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4223 *d_eeprom = 0x00; 4224 4225 /* Now load defaults (maybe set by boot/module params) */ 4226 set_safe_settings(); 4227 fix_settings(); 4228 eeprom_override(eeprom); 4229 4230 eeprom->cksum = 0x00; 4231 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4232 w_addr < 63; w_addr++, w_eeprom++) 4233 cksum += *w_eeprom; 4234 4235 *w_eeprom = 0x1234 - cksum; 4236 trms1040_write_all(eeprom, io_port); 4237 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4238 } else { 4239 set_safe_settings(); 4240 eeprom_index_to_delay(eeprom); 4241 eeprom_override(eeprom); 4242 } 4243 } 4244 4245 4246 /** 4247 * print_eeprom_settings - output the eeprom settings 4248 * to the kernel log so people can see what they were. 4249 * 4250 * @eeprom: The eeprom data strucutre to show details for. 4251 **/ 4252 static void __devinit print_eeprom_settings(struct NvRamType *eeprom) 4253 { 4254 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4255 eeprom->scsi_id, 4256 eeprom->target[0].period, 4257 clock_speed[eeprom->target[0].period] / 10, 4258 clock_speed[eeprom->target[0].period] % 10, 4259 eeprom->target[0].cfg0); 4260 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4261 eeprom->channel_cfg, eeprom->max_tag, 4262 1 << eeprom->max_tag, eeprom->delay_time); 4263 } 4264 4265 4266 /* Free SG tables */ 4267 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4268 { 4269 int i; 4270 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4271 4272 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4273 kfree(acb->srb_array[i].segment_x); 4274 } 4275 4276 4277 /* 4278 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4279 * should never cross a page boundary */ 4280 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4281 { 4282 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4283 *SEGMENTX_LEN; 4284 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4285 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4286 int srb_idx = 0; 4287 unsigned i = 0; 4288 struct SGentry *ptr; 4289 4290 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4291 acb->srb_array[i].segment_x = NULL; 4292 4293 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4294 while (pages--) { 4295 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL); 4296 if (!ptr) { 4297 adapter_sg_tables_free(acb); 4298 return 1; 4299 } 4300 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4301 PAGE_SIZE, ptr, srb_idx); 4302 i = 0; 4303 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4304 acb->srb_array[srb_idx++].segment_x = 4305 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4306 } 4307 if (i < srbs_per_page) 4308 acb->srb.segment_x = 4309 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4310 else 4311 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4312 return 0; 4313 } 4314 4315 4316 4317 /** 4318 * adapter_print_config - print adapter connection and termination 4319 * config 4320 * 4321 * The io port in the adapter needs to have been set before calling 4322 * this function. 4323 * 4324 * @acb: The adapter to print the information for. 4325 **/ 4326 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) 4327 { 4328 u8 bval; 4329 4330 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4331 dprintkl(KERN_INFO, "%sConnectors: ", 4332 ((bval & WIDESCSI) ? "(Wide) " : "")); 4333 if (!(bval & CON5068)) 4334 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4335 if (!(bval & CON68)) 4336 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4337 if (!(bval & CON50)) 4338 printk("int50 "); 4339 if ((bval & (CON5068 | CON50 | CON68)) == 4340 0 /*(CON5068 | CON50 | CON68) */ ) 4341 printk(" Oops! (All 3?) "); 4342 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4343 printk(" Termination: "); 4344 if (bval & DIS_TERM) 4345 printk("Disabled\n"); 4346 else { 4347 if (bval & AUTOTERM) 4348 printk("Auto "); 4349 if (bval & LOW8TERM) 4350 printk("Low "); 4351 if (bval & UP8TERM) 4352 printk("High "); 4353 printk("\n"); 4354 } 4355 } 4356 4357 4358 /** 4359 * adapter_init_params - Initialize the various parameters in the 4360 * adapter structure. Note that the pointer to the scsi_host is set 4361 * early (when this instance is created) and the io_port and irq 4362 * values are set later after they have been reserved. This just gets 4363 * everything set to a good starting position. 4364 * 4365 * The eeprom structure in the adapter needs to have been set before 4366 * calling this function. 4367 * 4368 * @acb: The adapter to initialize. 4369 **/ 4370 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) 4371 { 4372 struct NvRamType *eeprom = &acb->eeprom; 4373 int i; 4374 4375 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4376 /* NOTE: acb->io_port_base is set at port registration time */ 4377 /* NOTE: acb->io_port_len is set at port registration time */ 4378 4379 INIT_LIST_HEAD(&acb->dcb_list); 4380 acb->dcb_run_robin = NULL; 4381 acb->active_dcb = NULL; 4382 4383 INIT_LIST_HEAD(&acb->srb_free_list); 4384 /* temp SRB for Q tag used or abort command used */ 4385 acb->tmp_srb = &acb->srb; 4386 init_timer(&acb->waiting_timer); 4387 init_timer(&acb->selto_timer); 4388 4389 acb->srb_count = DC395x_MAX_SRB_CNT; 4390 4391 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4392 /* NOTE: acb->irq_level is set at IRQ registration time */ 4393 4394 acb->tag_max_num = 1 << eeprom->max_tag; 4395 if (acb->tag_max_num > 30) 4396 acb->tag_max_num = 30; 4397 4398 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4399 acb->gmode2 = eeprom->channel_cfg; 4400 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4401 4402 if (eeprom->channel_cfg & NAC_SCANLUN) 4403 acb->lun_chk = 1; 4404 acb->scan_devices = 1; 4405 4406 acb->scsi_host->this_id = eeprom->scsi_id; 4407 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4408 4409 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4410 acb->dcb_map[i] = 0; 4411 4412 acb->msg_len = 0; 4413 4414 /* link static array of srbs into the srb free list */ 4415 for (i = 0; i < acb->srb_count - 1; i++) 4416 srb_free_insert(acb, &acb->srb_array[i]); 4417 } 4418 4419 4420 /** 4421 * adapter_init_host - Initialize the scsi host instance based on 4422 * values that we have already stored in the adapter instance. There's 4423 * some mention that a lot of these are deprecated, so we won't use 4424 * them (we'll use the ones in the adapter instance) but we'll fill 4425 * them in in case something else needs them. 4426 * 4427 * The eeprom structure, irq and io ports in the adapter need to have 4428 * been set before calling this function. 4429 * 4430 * @host: The scsi host instance to fill in the values for. 4431 **/ 4432 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) 4433 { 4434 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4435 struct NvRamType *eeprom = &acb->eeprom; 4436 4437 host->max_cmd_len = 24; 4438 host->can_queue = DC395x_MAX_CMD_QUEUE; 4439 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4440 host->this_id = (int)eeprom->scsi_id; 4441 host->io_port = acb->io_port_base; 4442 host->n_io_port = acb->io_port_len; 4443 host->dma_channel = -1; 4444 host->unique_id = acb->io_port_base; 4445 host->irq = acb->irq_level; 4446 host->last_reset = jiffies; 4447 4448 host->max_id = 16; 4449 if (host->max_id - 1 == eeprom->scsi_id) 4450 host->max_id--; 4451 4452 #ifdef CONFIG_SCSI_MULTI_LUN 4453 if (eeprom->channel_cfg & NAC_SCANLUN) 4454 host->max_lun = 8; 4455 else 4456 host->max_lun = 1; 4457 #else 4458 host->max_lun = 1; 4459 #endif 4460 4461 } 4462 4463 4464 /** 4465 * adapter_init_chip - Get the chip into a know state and figure out 4466 * some of the settings that apply to this adapter. 4467 * 4468 * The io port in the adapter needs to have been set before calling 4469 * this function. The config will be configured correctly on return. 4470 * 4471 * @acb: The adapter which we are to init. 4472 **/ 4473 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) 4474 { 4475 struct NvRamType *eeprom = &acb->eeprom; 4476 4477 /* Mask all the interrupt */ 4478 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4479 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4480 4481 /* Reset SCSI module */ 4482 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4483 4484 /* Reset PCI/DMA module */ 4485 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4486 udelay(20); 4487 4488 /* program configuration 0 */ 4489 acb->config = HCC_AUTOTERM | HCC_PARITY; 4490 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4491 acb->config |= HCC_WIDE_CARD; 4492 4493 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4494 acb->config |= HCC_SCSI_RESET; 4495 4496 if (acb->config & HCC_SCSI_RESET) { 4497 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4498 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4499 4500 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4501 /*spin_unlock_irq (&io_request_lock); */ 4502 udelay(500); 4503 4504 acb->scsi_host->last_reset = 4505 jiffies + HZ / 2 + 4506 HZ * acb->eeprom.delay_time; 4507 4508 /*spin_lock_irq (&io_request_lock); */ 4509 } 4510 } 4511 4512 4513 /** 4514 * init_adapter - Grab the resource for the card, setup the adapter 4515 * information, set the card into a known state, create the various 4516 * tables etc etc. This basically gets all adapter information all up 4517 * to date, intialised and gets the chip in sync with it. 4518 * 4519 * @host: This hosts adapter structure 4520 * @io_port: The base I/O port 4521 * @irq: IRQ 4522 * 4523 * Returns 0 if the initialization succeeds, any other value on 4524 * failure. 4525 **/ 4526 static int __devinit adapter_init(struct AdapterCtlBlk *acb, 4527 unsigned long io_port, u32 io_port_len, unsigned int irq) 4528 { 4529 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4530 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4531 goto failed; 4532 } 4533 /* store port base to indicate we have registered it */ 4534 acb->io_port_base = io_port; 4535 acb->io_port_len = io_port_len; 4536 4537 if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) { 4538 /* release the region we just claimed */ 4539 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4540 goto failed; 4541 } 4542 /* store irq to indicate we have registered it */ 4543 acb->irq_level = irq; 4544 4545 /* get eeprom configuration information and command line settings etc */ 4546 check_eeprom(&acb->eeprom, io_port); 4547 print_eeprom_settings(&acb->eeprom); 4548 4549 /* setup adapter control block */ 4550 adapter_init_params(acb); 4551 4552 /* display card connectors/termination settings */ 4553 adapter_print_config(acb); 4554 4555 if (adapter_sg_tables_alloc(acb)) { 4556 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4557 goto failed; 4558 } 4559 adapter_init_scsi_host(acb->scsi_host); 4560 adapter_init_chip(acb); 4561 set_basic_config(acb); 4562 4563 dprintkdbg(DBG_0, 4564 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4565 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4566 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4567 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4568 return 0; 4569 4570 failed: 4571 if (acb->irq_level) 4572 free_irq(acb->irq_level, acb); 4573 if (acb->io_port_base) 4574 release_region(acb->io_port_base, acb->io_port_len); 4575 adapter_sg_tables_free(acb); 4576 4577 return 1; 4578 } 4579 4580 4581 /** 4582 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4583 * stopping all operations and disabling interrupt generation on the 4584 * card. 4585 * 4586 * @acb: The adapter which we are to shutdown. 4587 **/ 4588 static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4589 { 4590 /* disable interrupts */ 4591 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4592 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4593 4594 /* reset the scsi bus */ 4595 if (acb->config & HCC_SCSI_RESET) 4596 reset_scsi_bus(acb); 4597 4598 /* clear any pending interupt state */ 4599 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4600 } 4601 4602 4603 4604 /** 4605 * adapter_uninit - Shut down the chip and release any resources that 4606 * we had allocated. Once this returns the adapter should not be used 4607 * anymore. 4608 * 4609 * @acb: The adapter which we are to un-initialize. 4610 **/ 4611 static void adapter_uninit(struct AdapterCtlBlk *acb) 4612 { 4613 unsigned long flags; 4614 DC395x_LOCK_IO(acb->scsi_host, flags); 4615 4616 /* remove timers */ 4617 if (timer_pending(&acb->waiting_timer)) 4618 del_timer(&acb->waiting_timer); 4619 if (timer_pending(&acb->selto_timer)) 4620 del_timer(&acb->selto_timer); 4621 4622 adapter_uninit_chip(acb); 4623 adapter_remove_and_free_all_devices(acb); 4624 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4625 4626 if (acb->irq_level) 4627 free_irq(acb->irq_level, acb); 4628 if (acb->io_port_base) 4629 release_region(acb->io_port_base, acb->io_port_len); 4630 4631 adapter_sg_tables_free(acb); 4632 } 4633 4634 4635 #undef SPRINTF 4636 #define SPRINTF(args...) pos += sprintf(pos, args) 4637 4638 #undef YESNO 4639 #define YESNO(YN) \ 4640 if (YN) SPRINTF(" Yes ");\ 4641 else SPRINTF(" No ") 4642 4643 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, 4644 char **start, off_t offset, int length, int inout) 4645 { 4646 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4647 int spd, spd1; 4648 char *pos = buffer; 4649 struct DeviceCtlBlk *dcb; 4650 unsigned long flags; 4651 int dev; 4652 4653 if (inout) /* Has data been written to the file ? */ 4654 return -EPERM; 4655 4656 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4657 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4658 4659 DC395x_LOCK_IO(acb->scsi_host, flags); 4660 4661 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4662 SPRINTF("DC395U/UW/F DC315/U %s\n", 4663 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4664 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4665 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4666 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4667 4668 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); 4669 SPRINTF("AdapterID %i\n", host->this_id); 4670 4671 SPRINTF("tag_max_num %i", acb->tag_max_num); 4672 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4673 SPRINTF(", FilterCfg 0x%02x", 4674 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4675 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4676 /*SPRINTF("\n"); */ 4677 4678 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4679 SPRINTF 4680 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4681 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4682 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4683 acb->dcb_map[6], acb->dcb_map[7]); 4684 SPRINTF 4685 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4686 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4687 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4688 acb->dcb_map[14], acb->dcb_map[15]); 4689 4690 SPRINTF 4691 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4692 4693 dev = 0; 4694 list_for_each_entry(dcb, &acb->dcb_list, list) { 4695 int nego_period; 4696 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4697 dcb->target_lun); 4698 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4699 YESNO(dcb->sync_offset); 4700 YESNO(dcb->sync_period & WIDE_SYNC); 4701 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4702 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4703 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4704 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4705 if (dcb->sync_offset) 4706 SPRINTF(" %03i ns ", nego_period); 4707 else 4708 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4709 4710 if (dcb->sync_offset & 0x0f) { 4711 spd = 1000 / (nego_period); 4712 spd1 = 1000 % (nego_period); 4713 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4714 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4715 (dcb->sync_offset & 0x0f)); 4716 } else 4717 SPRINTF(" "); 4718 4719 /* Add more info ... */ 4720 SPRINTF(" %02i\n", dcb->max_command); 4721 dev++; 4722 } 4723 4724 if (timer_pending(&acb->waiting_timer)) 4725 SPRINTF("Waiting queue timer running\n"); 4726 else 4727 SPRINTF("\n"); 4728 4729 list_for_each_entry(dcb, &acb->dcb_list, list) { 4730 struct ScsiReqBlk *srb; 4731 if (!list_empty(&dcb->srb_waiting_list)) 4732 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4733 dcb->target_id, dcb->target_lun, 4734 list_size(&dcb->srb_waiting_list)); 4735 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4736 SPRINTF(" %li", srb->cmd->pid); 4737 if (!list_empty(&dcb->srb_going_list)) 4738 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4739 dcb->target_id, dcb->target_lun, 4740 list_size(&dcb->srb_going_list)); 4741 list_for_each_entry(srb, &dcb->srb_going_list, list) 4742 SPRINTF(" %li", srb->cmd->pid); 4743 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4744 SPRINTF("\n"); 4745 } 4746 4747 if (debug_enabled(DBG_1)) { 4748 SPRINTF("DCB list for ACB %p:\n", acb); 4749 list_for_each_entry(dcb, &acb->dcb_list, list) { 4750 SPRINTF("%p -> ", dcb); 4751 } 4752 SPRINTF("END\n"); 4753 } 4754 4755 *start = buffer + offset; 4756 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4757 4758 if (pos - buffer < offset) 4759 return 0; 4760 else if (pos - buffer - offset < length) 4761 return pos - buffer - offset; 4762 else 4763 return length; 4764 } 4765 4766 4767 static struct scsi_host_template dc395x_driver_template = { 4768 .module = THIS_MODULE, 4769 .proc_name = DC395X_NAME, 4770 .proc_info = dc395x_proc_info, 4771 .name = DC395X_BANNER " " DC395X_VERSION, 4772 .queuecommand = dc395x_queue_command, 4773 .bios_param = dc395x_bios_param, 4774 .slave_alloc = dc395x_slave_alloc, 4775 .slave_destroy = dc395x_slave_destroy, 4776 .can_queue = DC395x_MAX_CAN_QUEUE, 4777 .this_id = 7, 4778 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4779 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4780 .eh_abort_handler = dc395x_eh_abort, 4781 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4782 .unchecked_isa_dma = 0, 4783 .use_clustering = DISABLE_CLUSTERING, 4784 }; 4785 4786 4787 /** 4788 * banner_display - Display banner on first instance of driver 4789 * initialized. 4790 **/ 4791 static void banner_display(void) 4792 { 4793 static int banner_done = 0; 4794 if (!banner_done) 4795 { 4796 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4797 banner_done = 1; 4798 } 4799 } 4800 4801 4802 /** 4803 * dc395x_init_one - Initialise a single instance of the adapter. 4804 * 4805 * The PCI layer will call this once for each instance of the adapter 4806 * that it finds in the system. The pci_dev strcuture indicates which 4807 * instance we are being called from. 4808 * 4809 * @dev: The PCI device to intialize. 4810 * @id: Looks like a pointer to the entry in our pci device table 4811 * that was actually matched by the PCI subsystem. 4812 * 4813 * Returns 0 on success, or an error code (-ve) on failure. 4814 **/ 4815 static int __devinit dc395x_init_one(struct pci_dev *dev, 4816 const struct pci_device_id *id) 4817 { 4818 struct Scsi_Host *scsi_host = NULL; 4819 struct AdapterCtlBlk *acb = NULL; 4820 unsigned long io_port_base; 4821 unsigned int io_port_len; 4822 unsigned int irq; 4823 4824 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4825 banner_display(); 4826 4827 if (pci_enable_device(dev)) 4828 { 4829 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4830 return -ENODEV; 4831 } 4832 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4833 io_port_len = pci_resource_len(dev, 0); 4834 irq = dev->irq; 4835 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4836 4837 /* allocate scsi host information (includes out adapter) */ 4838 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4839 sizeof(struct AdapterCtlBlk)); 4840 if (!scsi_host) { 4841 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4842 goto fail; 4843 } 4844 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4845 acb->scsi_host = scsi_host; 4846 acb->dev = dev; 4847 4848 /* initialise the adapter and everything we need */ 4849 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4850 dprintkl(KERN_INFO, "adapter init failed\n"); 4851 goto fail; 4852 } 4853 4854 pci_set_master(dev); 4855 4856 /* get the scsi mid level to scan for new devices on the bus */ 4857 if (scsi_add_host(scsi_host, &dev->dev)) { 4858 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4859 goto fail; 4860 } 4861 pci_set_drvdata(dev, scsi_host); 4862 scsi_scan_host(scsi_host); 4863 4864 return 0; 4865 4866 fail: 4867 if (acb != NULL) 4868 adapter_uninit(acb); 4869 if (scsi_host != NULL) 4870 scsi_host_put(scsi_host); 4871 pci_disable_device(dev); 4872 return -ENODEV; 4873 } 4874 4875 4876 /** 4877 * dc395x_remove_one - Called to remove a single instance of the 4878 * adapter. 4879 * 4880 * @dev: The PCI device to intialize. 4881 **/ 4882 static void __devexit dc395x_remove_one(struct pci_dev *dev) 4883 { 4884 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4885 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4886 4887 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4888 4889 scsi_remove_host(scsi_host); 4890 adapter_uninit(acb); 4891 pci_disable_device(dev); 4892 scsi_host_put(scsi_host); 4893 pci_set_drvdata(dev, NULL); 4894 } 4895 4896 4897 static struct pci_device_id dc395x_pci_table[] = { 4898 { 4899 .vendor = PCI_VENDOR_ID_TEKRAM, 4900 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4901 .subvendor = PCI_ANY_ID, 4902 .subdevice = PCI_ANY_ID, 4903 }, 4904 {} /* Terminating entry */ 4905 }; 4906 MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4907 4908 4909 static struct pci_driver dc395x_driver = { 4910 .name = DC395X_NAME, 4911 .id_table = dc395x_pci_table, 4912 .probe = dc395x_init_one, 4913 .remove = __devexit_p(dc395x_remove_one), 4914 }; 4915 4916 4917 /** 4918 * dc395x_module_init - Module initialization function 4919 * 4920 * Used by both module and built-in driver to initialise this driver. 4921 **/ 4922 static int __init dc395x_module_init(void) 4923 { 4924 return pci_module_init(&dc395x_driver); 4925 } 4926 4927 4928 /** 4929 * dc395x_module_exit - Module cleanup function. 4930 **/ 4931 static void __exit dc395x_module_exit(void) 4932 { 4933 pci_unregister_driver(&dc395x_driver); 4934 } 4935 4936 4937 module_init(dc395x_module_init); 4938 module_exit(dc395x_module_exit); 4939 4940 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4941 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4942 MODULE_LICENSE("GPL"); 4943