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