1 /* 2 * dc395x.c 3 * 4 * Device Driver for Tekram DC395(U/UW/F), DC315(U) 5 * PCI SCSI Bus Master Host Adapter 6 * (SCSI chip set used Tekram ASIC TRM-S1040) 7 * 8 * Authors: 9 * C.L. Huang <ching@tekram.com.tw> 10 * Erich Chen <erich@tekram.com.tw> 11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. 12 * 13 * Kurt Garloff <garloff@suse.de> 14 * (C) 1999-2000 Kurt Garloff 15 * 16 * Oliver Neukum <oliver@neukum.name> 17 * Ali Akcaagac <aliakc@web.de> 18 * Jamie Lenehan <lenehan@twibble.org> 19 * (C) 2003 20 * 21 * License: GNU GPL 22 * 23 ************************************************************************* 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. The name of the author may not be used to endorse or promote products 34 * derived from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 ************************************************************************ 48 */ 49 #include <linux/module.h> 50 #include <linux/moduleparam.h> 51 #include <linux/delay.h> 52 #include <linux/ctype.h> 53 #include <linux/blkdev.h> 54 #include <linux/interrupt.h> 55 #include <linux/init.h> 56 #include <linux/spinlock.h> 57 #include <linux/pci.h> 58 #include <linux/list.h> 59 #include <linux/vmalloc.h> 60 #include <asm/io.h> 61 62 #include <scsi/scsi.h> 63 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */ 64 #include <scsi/scsi_cmnd.h> 65 #include <scsi/scsi_device.h> 66 #include <scsi/scsi_host.h> 67 68 #include "dc395x.h" 69 70 #define DC395X_NAME "dc395x" 71 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" 72 #define DC395X_VERSION "v2.05, 2004/03/08" 73 74 /*--------------------------------------------------------------------------- 75 Features 76 ---------------------------------------------------------------------------*/ 77 /* 78 * Set to disable parts of the driver 79 */ 80 /*#define DC395x_NO_DISCONNECT*/ 81 /*#define DC395x_NO_TAGQ*/ 82 /*#define DC395x_NO_SYNC*/ 83 /*#define DC395x_NO_WIDE*/ 84 85 /*--------------------------------------------------------------------------- 86 Debugging 87 ---------------------------------------------------------------------------*/ 88 /* 89 * Types of debugging that can be enabled and disabled 90 */ 91 #define DBG_KG 0x0001 92 #define DBG_0 0x0002 93 #define DBG_1 0x0004 94 #define DBG_SG 0x0020 95 #define DBG_FIFO 0x0040 96 #define DBG_PIO 0x0080 97 98 99 /* 100 * Set set of things to output debugging for. 101 * Undefine to remove all debugging 102 */ 103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ 104 /*#define DEBUG_MASK DBG_0*/ 105 106 107 /* 108 * Output a kernel mesage at the specified level and append the 109 * driver name and a ": " to the start of the message 110 */ 111 #define dprintkl(level, format, arg...) \ 112 printk(level DC395X_NAME ": " format , ## arg) 113 114 115 #ifdef DEBUG_MASK 116 /* 117 * print a debug message - this is formated with KERN_DEBUG, then the 118 * driver name followed by a ": " and then the message is output. 119 * This also checks that the specified debug level is enabled before 120 * outputing the message 121 */ 122 #define dprintkdbg(type, format, arg...) \ 123 do { \ 124 if ((type) & (DEBUG_MASK)) \ 125 dprintkl(KERN_DEBUG , format , ## arg); \ 126 } while (0) 127 128 /* 129 * Check if the specified type of debugging is enabled 130 */ 131 #define debug_enabled(type) ((DEBUG_MASK) & (type)) 132 133 #else 134 /* 135 * No debugging. Do nothing 136 */ 137 #define dprintkdbg(type, format, arg...) \ 138 do {} while (0) 139 #define debug_enabled(type) (0) 140 141 #endif 142 143 144 #ifndef PCI_VENDOR_ID_TEKRAM 145 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ 146 #endif 147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ 149 #endif 150 151 152 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) 153 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) 154 155 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) 156 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) 157 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) 158 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) 159 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) 160 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) 161 162 /* cmd->result */ 163 #define RES_TARGET 0x000000FF /* Target State */ 164 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */ 165 #define RES_ENDMSG 0x0000FF00 /* End Message */ 166 #define RES_DID 0x00FF0000 /* DID_ codes */ 167 #define RES_DRV 0xFF000000 /* DRIVER_ codes */ 168 169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) 170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) 171 172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } 173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } 174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } 175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } 176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } 177 178 #define TAG_NONE 255 179 180 /* 181 * srb->segement_x is the hw sg list. It is always allocated as a 182 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not 183 * cross a page boundy. 184 */ 185 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) 186 #define VIRTX_LEN (sizeof(void *) * DC395x_MAX_SG_LISTENTRY) 187 188 struct SGentry { 189 u32 address; /* bus! address */ 190 u32 length; 191 }; 192 193 /* The SEEPROM structure for TRM_S1040 */ 194 struct NVRamTarget { 195 u8 cfg0; /* Target configuration byte 0 */ 196 u8 period; /* Target period */ 197 u8 cfg2; /* Target configuration byte 2 */ 198 u8 cfg3; /* Target configuration byte 3 */ 199 }; 200 201 struct NvRamType { 202 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ 203 u8 sub_sys_id[2]; /* 2,3 Sub System ID */ 204 u8 sub_class; /* 4 Sub Class */ 205 u8 vendor_id[2]; /* 5,6 Vendor ID */ 206 u8 device_id[2]; /* 7,8 Device ID */ 207 u8 reserved; /* 9 Reserved */ 208 struct NVRamTarget target[DC395x_MAX_SCSI_ID]; 209 /** 10,11,12,13 210 ** 14,15,16,17 211 ** .... 212 ** .... 213 ** 70,71,72,73 214 */ 215 u8 scsi_id; /* 74 Host Adapter SCSI ID */ 216 u8 channel_cfg; /* 75 Channel configuration */ 217 u8 delay_time; /* 76 Power on delay time */ 218 u8 max_tag; /* 77 Maximum tags */ 219 u8 reserved0; /* 78 */ 220 u8 boot_target; /* 79 */ 221 u8 boot_lun; /* 80 */ 222 u8 reserved1; /* 81 */ 223 u16 reserved2[22]; /* 82,..125 */ 224 u16 cksum; /* 126,127 */ 225 }; 226 227 struct ScsiReqBlk { 228 struct list_head list; /* next/prev ptrs for srb lists */ 229 struct DeviceCtlBlk *dcb; 230 struct scsi_cmnd *cmd; 231 232 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ 233 u32 sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ 234 235 u8 sg_count; /* No of HW sg entries for this request */ 236 u8 sg_index; /* Index of HW sg entry for this request */ 237 u32 total_xfer_length; /* Total number of bytes remaining to be transfered */ 238 void **virt_map; 239 unsigned char *virt_addr; /* Virtual address of current transfer position */ 240 241 /* 242 * The sense buffer handling function, request_sense, uses 243 * the first hw sg entry (segment_x[0]) and the transfer 244 * length (total_xfer_length). While doing this it stores the 245 * original values into the last sg hw list 246 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the 247 * total_xfer_length in xferred. These values are restored in 248 * pci_unmap_srb_sense. This is the only place xferred is used. 249 */ 250 u32 xferred; /* Saved copy of total_xfer_length */ 251 252 u16 state; 253 254 u8 msgin_buf[6]; 255 u8 msgout_buf[6]; 256 257 u8 adapter_status; 258 u8 target_status; 259 u8 msg_count; 260 u8 end_message; 261 262 u8 tag_number; 263 u8 status; 264 u8 retry_count; 265 u8 flag; 266 267 u8 scsi_phase; 268 }; 269 270 struct DeviceCtlBlk { 271 struct list_head list; /* next/prev ptrs for the dcb list */ 272 struct AdapterCtlBlk *acb; 273 struct list_head srb_going_list; /* head of going srb list */ 274 struct list_head srb_waiting_list; /* head of waiting srb list */ 275 276 struct ScsiReqBlk *active_srb; 277 u32 tag_mask; 278 279 u16 max_command; 280 281 u8 target_id; /* SCSI Target ID (SCSI Only) */ 282 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ 283 u8 identify_msg; 284 u8 dev_mode; 285 286 u8 inquiry7; /* To store Inquiry flags */ 287 u8 sync_mode; /* 0:async mode */ 288 u8 min_nego_period; /* for nego. */ 289 u8 sync_period; /* for reg. */ 290 291 u8 sync_offset; /* for reg. and nego.(low nibble) */ 292 u8 flag; 293 u8 dev_type; 294 u8 init_tcq_flag; 295 }; 296 297 struct AdapterCtlBlk { 298 struct Scsi_Host *scsi_host; 299 300 unsigned long io_port_base; 301 unsigned long io_port_len; 302 303 struct list_head dcb_list; /* head of going dcb list */ 304 struct DeviceCtlBlk *dcb_run_robin; 305 struct DeviceCtlBlk *active_dcb; 306 307 struct list_head srb_free_list; /* head of free srb list */ 308 struct ScsiReqBlk *tmp_srb; 309 struct timer_list waiting_timer; 310 struct timer_list selto_timer; 311 312 u16 srb_count; 313 314 u8 sel_timeout; 315 316 unsigned int irq_level; 317 u8 tag_max_num; 318 u8 acb_flag; 319 u8 gmode2; 320 321 u8 config; 322 u8 lun_chk; 323 u8 scan_devices; 324 u8 hostid_bit; 325 326 u8 dcb_map[DC395x_MAX_SCSI_ID]; 327 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 328 329 struct pci_dev *dev; 330 331 u8 msg_len; 332 333 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 334 struct ScsiReqBlk srb; 335 336 struct NvRamType eeprom; /* eeprom settings for this adapter */ 337 }; 338 339 340 /*--------------------------------------------------------------------------- 341 Forward declarations 342 ---------------------------------------------------------------------------*/ 343 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 344 u16 *pscsi_status); 345 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 346 u16 *pscsi_status); 347 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 348 u16 *pscsi_status); 349 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 350 u16 *pscsi_status); 351 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 352 u16 *pscsi_status); 353 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 354 u16 *pscsi_status); 355 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 356 u16 *pscsi_status); 357 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 358 u16 *pscsi_status); 359 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 360 u16 *pscsi_status); 361 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 362 u16 *pscsi_status); 363 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 364 u16 *pscsi_status); 365 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 366 u16 *pscsi_status); 367 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 368 u16 *pscsi_status); 369 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 370 u16 *pscsi_status); 371 static void set_basic_config(struct AdapterCtlBlk *acb); 372 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 373 struct ScsiReqBlk *srb); 374 static void reset_scsi_bus(struct AdapterCtlBlk *acb); 375 static void data_io_transfer(struct AdapterCtlBlk *acb, 376 struct ScsiReqBlk *srb, u16 io_dir); 377 static void disconnect(struct AdapterCtlBlk *acb); 378 static void reselect(struct AdapterCtlBlk *acb); 379 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 380 struct ScsiReqBlk *srb); 381 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 382 struct ScsiReqBlk *srb); 383 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 384 struct ScsiReqBlk *srb); 385 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 386 struct scsi_cmnd *cmd, u8 force); 387 static void scsi_reset_detect(struct AdapterCtlBlk *acb); 388 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 389 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 390 struct ScsiReqBlk *srb); 391 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 392 struct ScsiReqBlk *srb); 393 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 394 struct ScsiReqBlk *srb); 395 static void set_xfer_rate(struct AdapterCtlBlk *acb, 396 struct DeviceCtlBlk *dcb); 397 static void waiting_timeout(unsigned long ptr); 398 399 400 /*--------------------------------------------------------------------------- 401 Static Data 402 ---------------------------------------------------------------------------*/ 403 static u16 current_sync_offset = 0; 404 405 static void *dc395x_scsi_phase0[] = { 406 data_out_phase0,/* phase:0 */ 407 data_in_phase0, /* phase:1 */ 408 command_phase0, /* phase:2 */ 409 status_phase0, /* phase:3 */ 410 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 411 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 412 msgout_phase0, /* phase:6 */ 413 msgin_phase0, /* phase:7 */ 414 }; 415 416 static void *dc395x_scsi_phase1[] = { 417 data_out_phase1,/* phase:0 */ 418 data_in_phase1, /* phase:1 */ 419 command_phase1, /* phase:2 */ 420 status_phase1, /* phase:3 */ 421 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 422 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 423 msgout_phase1, /* phase:6 */ 424 msgin_phase1, /* phase:7 */ 425 }; 426 427 /* 428 *Fast20: 000 50ns, 20.0 MHz 429 * 001 75ns, 13.3 MHz 430 * 010 100ns, 10.0 MHz 431 * 011 125ns, 8.0 MHz 432 * 100 150ns, 6.6 MHz 433 * 101 175ns, 5.7 MHz 434 * 110 200ns, 5.0 MHz 435 * 111 250ns, 4.0 MHz 436 * 437 *Fast40(LVDS): 000 25ns, 40.0 MHz 438 * 001 50ns, 20.0 MHz 439 * 010 75ns, 13.3 MHz 440 * 011 100ns, 10.0 MHz 441 * 100 125ns, 8.0 MHz 442 * 101 150ns, 6.6 MHz 443 * 110 175ns, 5.7 MHz 444 * 111 200ns, 5.0 MHz 445 */ 446 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 447 448 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 449 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 450 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 451 452 453 /*--------------------------------------------------------------------------- 454 Configuration 455 ---------------------------------------------------------------------------*/ 456 /* 457 * Module/boot parameters currently effect *all* instances of the 458 * card in the system. 459 */ 460 461 /* 462 * Command line parameters are stored in a structure below. 463 * These are the index's into the structure for the various 464 * command line options. 465 */ 466 #define CFG_ADAPTER_ID 0 467 #define CFG_MAX_SPEED 1 468 #define CFG_DEV_MODE 2 469 #define CFG_ADAPTER_MODE 3 470 #define CFG_TAGS 4 471 #define CFG_RESET_DELAY 5 472 473 #define CFG_NUM 6 /* number of configuration items */ 474 475 476 /* 477 * Value used to indicate that a command line override 478 * hasn't been used to modify the value. 479 */ 480 #define CFG_PARAM_UNSET -1 481 482 483 /* 484 * Hold command line parameters. 485 */ 486 struct ParameterData { 487 int value; /* value of this setting */ 488 int min; /* minimum value */ 489 int max; /* maximum value */ 490 int def; /* default value */ 491 int safe; /* safe value */ 492 }; 493 static struct ParameterData __devinitdata cfg_data[] = { 494 { /* adapter id */ 495 CFG_PARAM_UNSET, 496 0, 497 15, 498 7, 499 7 500 }, 501 { /* max speed */ 502 CFG_PARAM_UNSET, 503 0, 504 7, 505 1, /* 13.3Mhz */ 506 4, /* 6.7Hmz */ 507 }, 508 { /* dev mode */ 509 CFG_PARAM_UNSET, 510 0, 511 0x3f, 512 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 513 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 514 NTC_DO_SEND_START, 515 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 516 }, 517 { /* adapter mode */ 518 CFG_PARAM_UNSET, 519 0, 520 0x2f, 521 #ifdef CONFIG_SCSI_MULTI_LUN 522 NAC_SCANLUN | 523 #endif 524 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET 525 /*| NAC_ACTIVE_NEG*/, 526 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 527 }, 528 { /* tags */ 529 CFG_PARAM_UNSET, 530 0, 531 5, 532 3, /* 16 tags (??) */ 533 2, 534 }, 535 { /* reset delay */ 536 CFG_PARAM_UNSET, 537 0, 538 180, 539 1, /* 1 second */ 540 10, /* 10 seconds */ 541 } 542 }; 543 544 545 /* 546 * Safe settings. If set to zero the the BIOS/default values with 547 * command line overrides will be used. If set to 1 then safe and 548 * slow settings will be used. 549 */ 550 static int use_safe_settings = 0; 551 module_param_named(safe, use_safe_settings, bool, 0); 552 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); 553 554 555 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); 556 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); 557 558 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); 559 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"); 560 561 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); 562 MODULE_PARM_DESC(dev_mode, "Device mode."); 563 564 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); 565 MODULE_PARM_DESC(adapter_mode, "Adapter mode."); 566 567 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); 568 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); 569 570 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); 571 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); 572 573 574 /** 575 * set_safe_settings - if the use_safe_settings option is set then 576 * set all values to the safe and slow values. 577 **/ 578 static void __devinit set_safe_settings(void) 579 { 580 if (use_safe_settings) 581 { 582 int i; 583 584 dprintkl(KERN_INFO, "Using safe settings.\n"); 585 for (i = 0; i < CFG_NUM; i++) 586 { 587 cfg_data[i].value = cfg_data[i].safe; 588 } 589 } 590 } 591 592 593 /** 594 * fix_settings - reset any boot parameters which are out of range 595 * back to the default values. 596 **/ 597 static void __devinit fix_settings(void) 598 { 599 int i; 600 601 dprintkdbg(DBG_1, 602 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " 603 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", 604 cfg_data[CFG_ADAPTER_ID].value, 605 cfg_data[CFG_MAX_SPEED].value, 606 cfg_data[CFG_DEV_MODE].value, 607 cfg_data[CFG_ADAPTER_MODE].value, 608 cfg_data[CFG_TAGS].value, 609 cfg_data[CFG_RESET_DELAY].value); 610 for (i = 0; i < CFG_NUM; i++) 611 { 612 if (cfg_data[i].value < cfg_data[i].min 613 || cfg_data[i].value > cfg_data[i].max) 614 cfg_data[i].value = cfg_data[i].def; 615 } 616 } 617 618 619 620 /* 621 * Mapping from the eeprom delay index value (index into this array) 622 * to the the number of actual seconds that the delay should be for. 623 */ 624 static char __devinitdata eeprom_index_to_delay_map[] = 625 { 1, 3, 5, 10, 16, 30, 60, 120 }; 626 627 628 /** 629 * eeprom_index_to_delay - Take the eeprom delay setting and convert it 630 * into a number of seconds. 631 * 632 * @eeprom: The eeprom structure in which we find the delay index to map. 633 **/ 634 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom) 635 { 636 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; 637 } 638 639 640 /** 641 * delay_to_eeprom_index - Take a delay in seconds and return the 642 * closest eeprom index which will delay for at least that amount of 643 * seconds. 644 * 645 * @delay: The delay, in seconds, to find the eeprom index for. 646 **/ 647 static int __devinit delay_to_eeprom_index(int delay) 648 { 649 u8 idx = 0; 650 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) 651 idx++; 652 return idx; 653 } 654 655 656 /** 657 * eeprom_override - Override the eeprom settings, in the provided 658 * eeprom structure, with values that have been set on the command 659 * line. 660 * 661 * @eeprom: The eeprom data to override with command line options. 662 **/ 663 static void __devinit eeprom_override(struct NvRamType *eeprom) 664 { 665 u8 id; 666 667 /* Adapter Settings */ 668 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) 669 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; 670 671 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) 672 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; 673 674 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) 675 eeprom->delay_time = delay_to_eeprom_index( 676 cfg_data[CFG_RESET_DELAY].value); 677 678 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) 679 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; 680 681 /* Device Settings */ 682 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { 683 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) 684 eeprom->target[id].cfg0 = 685 (u8)cfg_data[CFG_DEV_MODE].value; 686 687 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) 688 eeprom->target[id].period = 689 (u8)cfg_data[CFG_MAX_SPEED].value; 690 691 } 692 } 693 694 695 /*--------------------------------------------------------------------------- 696 ---------------------------------------------------------------------------*/ 697 698 static unsigned int list_size(struct list_head *head) 699 { 700 unsigned int count = 0; 701 struct list_head *pos; 702 list_for_each(pos, head) 703 count++; 704 return count; 705 } 706 707 708 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, 709 struct DeviceCtlBlk *pos) 710 { 711 int use_next = 0; 712 struct DeviceCtlBlk* next = NULL; 713 struct DeviceCtlBlk* i; 714 715 if (list_empty(head)) 716 return NULL; 717 718 /* find supplied dcb and then select the next one */ 719 list_for_each_entry(i, head, list) 720 if (use_next) { 721 next = i; 722 break; 723 } else if (i == pos) { 724 use_next = 1; 725 } 726 /* if no next one take the head one (ie, wraparound) */ 727 if (!next) 728 list_for_each_entry(i, head, list) { 729 next = i; 730 break; 731 } 732 733 return next; 734 } 735 736 737 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 738 { 739 if (srb->tag_number < 255) { 740 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ 741 srb->tag_number = 255; 742 } 743 } 744 745 746 /* Find cmd in SRB list */ 747 inline static struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 748 struct list_head *head) 749 { 750 struct ScsiReqBlk *i; 751 list_for_each_entry(i, head, list) 752 if (i->cmd == cmd) 753 return i; 754 return NULL; 755 } 756 757 758 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) 759 { 760 struct list_head *head = &acb->srb_free_list; 761 struct ScsiReqBlk *srb = NULL; 762 763 if (!list_empty(head)) { 764 srb = list_entry(head->next, struct ScsiReqBlk, list); 765 list_del(head->next); 766 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); 767 } 768 return srb; 769 } 770 771 772 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 773 { 774 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); 775 list_add_tail(&srb->list, &acb->srb_free_list); 776 } 777 778 779 static void srb_waiting_insert(struct DeviceCtlBlk *dcb, 780 struct ScsiReqBlk *srb) 781 { 782 dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n", 783 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 784 list_add(&srb->list, &dcb->srb_waiting_list); 785 } 786 787 788 static void srb_waiting_append(struct DeviceCtlBlk *dcb, 789 struct ScsiReqBlk *srb) 790 { 791 dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n", 792 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 793 list_add_tail(&srb->list, &dcb->srb_waiting_list); 794 } 795 796 797 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 798 { 799 dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n", 800 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 801 list_add_tail(&srb->list, &dcb->srb_going_list); 802 } 803 804 805 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 806 { 807 struct ScsiReqBlk *i; 808 struct ScsiReqBlk *tmp; 809 dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n", 810 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 811 812 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) 813 if (i == srb) { 814 list_del(&srb->list); 815 break; 816 } 817 } 818 819 820 static void srb_waiting_remove(struct DeviceCtlBlk *dcb, 821 struct ScsiReqBlk *srb) 822 { 823 struct ScsiReqBlk *i; 824 struct ScsiReqBlk *tmp; 825 dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n", 826 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 827 828 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) 829 if (i == srb) { 830 list_del(&srb->list); 831 break; 832 } 833 } 834 835 836 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, 837 struct ScsiReqBlk *srb) 838 { 839 dprintkdbg(DBG_0, 840 "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n", 841 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 842 list_move(&srb->list, &dcb->srb_waiting_list); 843 } 844 845 846 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, 847 struct ScsiReqBlk *srb) 848 { 849 dprintkdbg(DBG_0, 850 "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n", 851 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 852 list_move(&srb->list, &dcb->srb_going_list); 853 } 854 855 856 /* Sets the timer to wake us up */ 857 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 858 { 859 if (timer_pending(&acb->waiting_timer)) 860 return; 861 init_timer(&acb->waiting_timer); 862 acb->waiting_timer.function = waiting_timeout; 863 acb->waiting_timer.data = (unsigned long) acb; 864 if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) 865 acb->waiting_timer.expires = 866 acb->scsi_host->last_reset - HZ / 2 + 1; 867 else 868 acb->waiting_timer.expires = jiffies + to + 1; 869 add_timer(&acb->waiting_timer); 870 } 871 872 873 /* Send the next command from the waiting list to the bus */ 874 static void waiting_process_next(struct AdapterCtlBlk *acb) 875 { 876 struct DeviceCtlBlk *start = NULL; 877 struct DeviceCtlBlk *pos; 878 struct DeviceCtlBlk *dcb; 879 struct ScsiReqBlk *srb; 880 struct list_head *dcb_list_head = &acb->dcb_list; 881 882 if (acb->active_dcb 883 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 884 return; 885 886 if (timer_pending(&acb->waiting_timer)) 887 del_timer(&acb->waiting_timer); 888 889 if (list_empty(dcb_list_head)) 890 return; 891 892 /* 893 * Find the starting dcb. Need to find it again in the list 894 * since the list may have changed since we set the ptr to it 895 */ 896 list_for_each_entry(dcb, dcb_list_head, list) 897 if (dcb == acb->dcb_run_robin) { 898 start = dcb; 899 break; 900 } 901 if (!start) { 902 /* This can happen! */ 903 start = list_entry(dcb_list_head->next, typeof(*start), list); 904 acb->dcb_run_robin = start; 905 } 906 907 908 /* 909 * Loop over the dcb, but we start somewhere (potentially) in 910 * the middle of the loop so we need to manully do this. 911 */ 912 pos = start; 913 do { 914 struct list_head *waiting_list_head = &pos->srb_waiting_list; 915 916 /* Make sure, the next another device gets scheduled ... */ 917 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 918 acb->dcb_run_robin); 919 920 if (list_empty(waiting_list_head) || 921 pos->max_command <= list_size(&pos->srb_going_list)) { 922 /* move to next dcb */ 923 pos = dcb_get_next(dcb_list_head, pos); 924 } else { 925 srb = list_entry(waiting_list_head->next, 926 struct ScsiReqBlk, list); 927 928 /* Try to send to the bus */ 929 if (!start_scsi(acb, pos, srb)) 930 srb_waiting_to_going_move(pos, srb); 931 else 932 waiting_set_timer(acb, HZ/50); 933 break; 934 } 935 } while (pos != start); 936 } 937 938 939 /* Wake up waiting queue */ 940 static void waiting_timeout(unsigned long ptr) 941 { 942 unsigned long flags; 943 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 944 dprintkdbg(DBG_1, 945 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 946 DC395x_LOCK_IO(acb->scsi_host, flags); 947 waiting_process_next(acb); 948 DC395x_UNLOCK_IO(acb->scsi_host, flags); 949 } 950 951 952 /* Get the DCB for a given ID/LUN combination */ 953 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 954 { 955 return acb->children[id][lun]; 956 } 957 958 959 /* Send SCSI Request Block (srb) to adapter (acb) */ 960 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 961 { 962 struct DeviceCtlBlk *dcb = srb->dcb; 963 964 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 965 acb->active_dcb || 966 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 967 srb_waiting_append(dcb, srb); 968 waiting_process_next(acb); 969 return; 970 } 971 972 if (!start_scsi(acb, dcb, srb)) 973 srb_going_append(dcb, srb); 974 else { 975 srb_waiting_insert(dcb, srb); 976 waiting_set_timer(acb, HZ / 50); 977 } 978 } 979 980 981 /* Prepare SRB for being sent to Device DCB w/ command *cmd */ 982 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 983 struct ScsiReqBlk *srb) 984 { 985 enum dma_data_direction dir = cmd->sc_data_direction; 986 dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", 987 cmd->pid, dcb->target_id, dcb->target_lun); 988 989 srb->dcb = dcb; 990 srb->cmd = cmd; 991 srb->sg_count = 0; 992 srb->total_xfer_length = 0; 993 srb->sg_bus_addr = 0; 994 srb->virt_addr = NULL; 995 srb->sg_index = 0; 996 srb->adapter_status = 0; 997 srb->target_status = 0; 998 srb->msg_count = 0; 999 srb->status = 0; 1000 srb->flag = 0; 1001 srb->state = 0; 1002 srb->retry_count = 0; 1003 srb->tag_number = TAG_NONE; 1004 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1005 srb->end_message = 0; 1006 1007 if (dir == PCI_DMA_NONE || !cmd->request_buffer) { 1008 dprintkdbg(DBG_0, 1009 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1010 cmd->bufflen, cmd->request_buffer, 1011 cmd->use_sg, srb->segment_x[0].address); 1012 } else if (cmd->use_sg) { 1013 int i; 1014 u32 reqlen = cmd->request_bufflen; 1015 struct scatterlist *sl = (struct scatterlist *) 1016 cmd->request_buffer; 1017 struct SGentry *sgp = srb->segment_x; 1018 srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, 1019 dir); 1020 dprintkdbg(DBG_0, 1021 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1022 reqlen, cmd->request_buffer, cmd->use_sg, 1023 srb->sg_count); 1024 1025 for (i = 0; i < srb->sg_count; i++) { 1026 u32 seglen = (u32)sg_dma_len(sl + i); 1027 sgp[i].address = (u32)sg_dma_address(sl + i); 1028 sgp[i].length = seglen; 1029 srb->total_xfer_length += seglen; 1030 srb->virt_map[i] = kmap(sl[i].page); 1031 } 1032 srb->virt_addr = srb->virt_map[0]; 1033 sgp += srb->sg_count - 1; 1034 1035 /* 1036 * adjust last page if too big as it is allocated 1037 * on even page boundaries 1038 */ 1039 if (srb->total_xfer_length > reqlen) { 1040 sgp->length -= (srb->total_xfer_length - reqlen); 1041 srb->total_xfer_length = reqlen; 1042 } 1043 1044 /* Fixup for WIDE padding - make sure length is even */ 1045 if (dcb->sync_period & WIDE_SYNC && 1046 srb->total_xfer_length % 2) { 1047 srb->total_xfer_length++; 1048 sgp->length++; 1049 } 1050 1051 srb->sg_bus_addr = pci_map_single(dcb->acb->dev, 1052 srb->segment_x, 1053 SEGMENTX_LEN, 1054 PCI_DMA_TODEVICE); 1055 1056 dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", 1057 srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); 1058 } else { 1059 srb->total_xfer_length = cmd->request_bufflen; 1060 srb->sg_count = 1; 1061 srb->segment_x[0].address = 1062 pci_map_single(dcb->acb->dev, cmd->request_buffer, 1063 srb->total_xfer_length, dir); 1064 1065 /* Fixup for WIDE padding - make sure length is even */ 1066 if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) 1067 srb->total_xfer_length++; 1068 1069 srb->segment_x[0].length = srb->total_xfer_length; 1070 srb->virt_addr = cmd->request_buffer; 1071 dprintkdbg(DBG_0, 1072 "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", 1073 srb->total_xfer_length, cmd->request_buffer, 1074 cmd->use_sg, srb->segment_x[0].address); 1075 } 1076 } 1077 1078 1079 /** 1080 * dc395x_queue_command - queue scsi command passed from the mid 1081 * layer, invoke 'done' on completion 1082 * 1083 * @cmd: pointer to scsi command object 1084 * @done: function pointer to be invoked on completion 1085 * 1086 * Returns 1 if the adapter (host) is busy, else returns 0. One 1087 * reason for an adapter to be busy is that the number 1088 * of outstanding queued commands is already equal to 1089 * struct Scsi_Host::can_queue . 1090 * 1091 * Required: if struct Scsi_Host::can_queue is ever non-zero 1092 * then this function is required. 1093 * 1094 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1095 * and is expected to be held on return. 1096 * 1097 **/ 1098 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1099 { 1100 struct DeviceCtlBlk *dcb; 1101 struct ScsiReqBlk *srb; 1102 struct AdapterCtlBlk *acb = 1103 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1104 dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", 1105 cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); 1106 1107 /* Assume BAD_TARGET; will be cleared later */ 1108 cmd->result = DID_BAD_TARGET << 16; 1109 1110 /* ignore invalid targets */ 1111 if (cmd->device->id >= acb->scsi_host->max_id || 1112 cmd->device->lun >= acb->scsi_host->max_lun || 1113 cmd->device->lun >31) { 1114 goto complete; 1115 } 1116 1117 /* does the specified lun on the specified device exist */ 1118 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1119 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1120 cmd->device->id, cmd->device->lun); 1121 goto complete; 1122 } 1123 1124 /* do we have a DCB for the device */ 1125 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1126 if (!dcb) { 1127 /* should never happen */ 1128 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1129 cmd->device->id, cmd->device->lun); 1130 goto complete; 1131 } 1132 1133 /* set callback and clear result in the command */ 1134 cmd->scsi_done = done; 1135 cmd->result = 0; 1136 1137 srb = srb_get_free(acb); 1138 if (!srb) 1139 { 1140 /* 1141 * Return 1 since we are unable to queue this command at this 1142 * point in time. 1143 */ 1144 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1145 return 1; 1146 } 1147 1148 build_srb(cmd, dcb, srb); 1149 1150 if (!list_empty(&dcb->srb_waiting_list)) { 1151 /* append to waiting queue */ 1152 srb_waiting_append(dcb, srb); 1153 waiting_process_next(acb); 1154 } else { 1155 /* process immediately */ 1156 send_srb(acb, srb); 1157 } 1158 dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid); 1159 return 0; 1160 1161 complete: 1162 /* 1163 * Complete the command immediatey, and then return 0 to 1164 * indicate that we have handled the command. This is usually 1165 * done when the commad is for things like non existent 1166 * devices. 1167 */ 1168 done(cmd); 1169 return 0; 1170 } 1171 1172 1173 /* 1174 * Return the disk geometry for the given SCSI device. 1175 */ 1176 static int dc395x_bios_param(struct scsi_device *sdev, 1177 struct block_device *bdev, sector_t capacity, int *info) 1178 { 1179 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1180 int heads, sectors, cylinders; 1181 struct AdapterCtlBlk *acb; 1182 int size = capacity; 1183 1184 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1185 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1186 heads = 64; 1187 sectors = 32; 1188 cylinders = size / (heads * sectors); 1189 1190 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1191 heads = 255; 1192 sectors = 63; 1193 cylinders = size / (heads * sectors); 1194 } 1195 geom[0] = heads; 1196 geom[1] = sectors; 1197 geom[2] = cylinders; 1198 return 0; 1199 #else 1200 return scsicam_bios_param(bdev, capacity, info); 1201 #endif 1202 } 1203 1204 1205 static void dump_register_info(struct AdapterCtlBlk *acb, 1206 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1207 { 1208 u16 pstat; 1209 struct pci_dev *dev = acb->dev; 1210 pci_read_config_word(dev, PCI_STATUS, &pstat); 1211 if (!dcb) 1212 dcb = acb->active_dcb; 1213 if (!srb && dcb) 1214 srb = dcb->active_srb; 1215 if (srb) { 1216 if (!srb->cmd) 1217 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1218 srb, srb->cmd); 1219 else 1220 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " 1221 "cmnd=0x%02x <%02i-%i>\n", 1222 srb, srb->cmd, srb->cmd->pid, 1223 srb->cmd->cmnd[0], srb->cmd->device->id, 1224 srb->cmd->device->lun); 1225 printk(" sglist=%p cnt=%i idx=%i len=%i\n", 1226 srb->segment_x, srb->sg_count, srb->sg_index, 1227 srb->total_xfer_length); 1228 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1229 srb->state, srb->status, srb->scsi_phase, 1230 (acb->active_dcb) ? "" : "not"); 1231 } 1232 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1233 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1234 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1235 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1236 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1237 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1238 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1239 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1240 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1241 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1242 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1243 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1244 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1245 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1246 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1247 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1248 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1249 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1250 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1251 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1252 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1253 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1254 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1255 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1256 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1257 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1258 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1259 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1260 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1261 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1262 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1263 "pci{status=0x%04x}\n", 1264 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1265 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1266 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1267 pstat); 1268 } 1269 1270 1271 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1272 { 1273 #if debug_enabled(DBG_FIFO) 1274 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1275 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1276 if (!(fifocnt & 0x40)) 1277 dprintkdbg(DBG_FIFO, 1278 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1279 fifocnt & 0x3f, lines, txt); 1280 #endif 1281 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1282 } 1283 1284 1285 static void reset_dev_param(struct AdapterCtlBlk *acb) 1286 { 1287 struct DeviceCtlBlk *dcb; 1288 struct NvRamType *eeprom = &acb->eeprom; 1289 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1290 1291 list_for_each_entry(dcb, &acb->dcb_list, list) { 1292 u8 period_index; 1293 1294 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1295 dcb->sync_period = 0; 1296 dcb->sync_offset = 0; 1297 1298 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1299 period_index = eeprom->target[dcb->target_id].period & 0x07; 1300 dcb->min_nego_period = clock_period[period_index]; 1301 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1302 || !(acb->config & HCC_WIDE_CARD)) 1303 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1304 } 1305 } 1306 1307 1308 /* 1309 * perform a hard reset on the SCSI bus 1310 * @cmd - some command for this host (for fetching hooks) 1311 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1312 */ 1313 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1314 { 1315 struct AdapterCtlBlk *acb = 1316 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1317 dprintkl(KERN_INFO, 1318 "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", 1319 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1320 1321 if (timer_pending(&acb->waiting_timer)) 1322 del_timer(&acb->waiting_timer); 1323 1324 /* 1325 * disable interrupt 1326 */ 1327 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1328 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1329 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1330 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1331 1332 reset_scsi_bus(acb); 1333 udelay(500); 1334 1335 /* We may be in serious trouble. Wait some seconds */ 1336 acb->scsi_host->last_reset = 1337 jiffies + 3 * HZ / 2 + 1338 HZ * acb->eeprom.delay_time; 1339 1340 /* 1341 * re-enable interrupt 1342 */ 1343 /* Clear SCSI FIFO */ 1344 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1345 clear_fifo(acb, "eh_bus_reset"); 1346 /* Delete pending IRQ */ 1347 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1348 set_basic_config(acb); 1349 1350 reset_dev_param(acb); 1351 doing_srb_done(acb, DID_RESET, cmd, 0); 1352 acb->active_dcb = NULL; 1353 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1354 waiting_process_next(acb); 1355 1356 return SUCCESS; 1357 } 1358 1359 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1360 { 1361 int rc; 1362 1363 spin_lock_irq(cmd->device->host->host_lock); 1364 rc = __dc395x_eh_bus_reset(cmd); 1365 spin_unlock_irq(cmd->device->host->host_lock); 1366 1367 return rc; 1368 } 1369 1370 /* 1371 * abort an errant SCSI command 1372 * @cmd - command to be aborted 1373 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1374 */ 1375 static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1376 { 1377 /* 1378 * Look into our command queues: If it has not been sent already, 1379 * we remove it and return success. Otherwise fail. 1380 */ 1381 struct AdapterCtlBlk *acb = 1382 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1383 struct DeviceCtlBlk *dcb; 1384 struct ScsiReqBlk *srb; 1385 dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", 1386 cmd->pid, cmd->device->id, cmd->device->lun, cmd); 1387 1388 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1389 if (!dcb) { 1390 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1391 return FAILED; 1392 } 1393 1394 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1395 if (srb) { 1396 srb_waiting_remove(dcb, srb); 1397 pci_unmap_srb_sense(acb, srb); 1398 pci_unmap_srb(acb, srb); 1399 free_tag(dcb, srb); 1400 srb_free_insert(acb, srb); 1401 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1402 cmd->result = DID_ABORT << 16; 1403 return SUCCESS; 1404 } 1405 srb = find_cmd(cmd, &dcb->srb_going_list); 1406 if (srb) { 1407 dprintkl(KERN_DEBUG, "eh_abort: Command in progress"); 1408 /* XXX: Should abort the command here */ 1409 } else { 1410 dprintkl(KERN_DEBUG, "eh_abort: Command not found"); 1411 } 1412 return FAILED; 1413 } 1414 1415 1416 /* SDTR */ 1417 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1418 struct ScsiReqBlk *srb) 1419 { 1420 u8 *ptr = srb->msgout_buf + srb->msg_count; 1421 if (srb->msg_count > 1) { 1422 dprintkl(KERN_INFO, 1423 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1424 srb->msg_count, srb->msgout_buf[0], 1425 srb->msgout_buf[1]); 1426 return; 1427 } 1428 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1429 dcb->sync_offset = 0; 1430 dcb->min_nego_period = 200 >> 2; 1431 } else if (dcb->sync_offset == 0) 1432 dcb->sync_offset = SYNC_NEGO_OFFSET; 1433 1434 *ptr++ = MSG_EXTENDED; /* (01h) */ 1435 *ptr++ = 3; /* length */ 1436 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1437 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1438 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1439 srb->msg_count += 5; 1440 srb->state |= SRB_DO_SYNC_NEGO; 1441 } 1442 1443 1444 /* WDTR */ 1445 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1446 struct ScsiReqBlk *srb) 1447 { 1448 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1449 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1450 u8 *ptr = srb->msgout_buf + srb->msg_count; 1451 if (srb->msg_count > 1) { 1452 dprintkl(KERN_INFO, 1453 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1454 srb->msg_count, srb->msgout_buf[0], 1455 srb->msgout_buf[1]); 1456 return; 1457 } 1458 *ptr++ = MSG_EXTENDED; /* (01h) */ 1459 *ptr++ = 2; /* length */ 1460 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1461 *ptr++ = wide; 1462 srb->msg_count += 4; 1463 srb->state |= SRB_DO_WIDE_NEGO; 1464 } 1465 1466 1467 #if 0 1468 /* Timer to work around chip flaw: When selecting and the bus is 1469 * busy, we sometimes miss a Selection timeout IRQ */ 1470 void selection_timeout_missed(unsigned long ptr); 1471 /* Sets the timer to wake us up */ 1472 static void selto_timer(struct AdapterCtlBlk *acb) 1473 { 1474 if (timer_pending(&acb->selto_timer)) 1475 return; 1476 acb->selto_timer.function = selection_timeout_missed; 1477 acb->selto_timer.data = (unsigned long) acb; 1478 if (time_before 1479 (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) 1480 acb->selto_timer.expires = 1481 acb->scsi_host->last_reset + HZ / 2 + 1; 1482 else 1483 acb->selto_timer.expires = jiffies + HZ + 1; 1484 add_timer(&acb->selto_timer); 1485 } 1486 1487 1488 void selection_timeout_missed(unsigned long ptr) 1489 { 1490 unsigned long flags; 1491 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1492 struct ScsiReqBlk *srb; 1493 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1494 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1495 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1496 return; 1497 } 1498 DC395x_LOCK_IO(acb->scsi_host, flags); 1499 srb = acb->active_dcb->active_srb; 1500 disconnect(acb); 1501 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1502 } 1503 #endif 1504 1505 1506 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1507 struct ScsiReqBlk* srb) 1508 { 1509 u16 s_stat2, return_code; 1510 u8 s_stat, scsicommand, i, identify_message; 1511 u8 *ptr; 1512 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", 1513 srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); 1514 1515 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1516 1517 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1518 s_stat2 = 0; 1519 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1520 #if 1 1521 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1522 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", 1523 srb->cmd->pid, s_stat, s_stat2); 1524 /* 1525 * Try anyway? 1526 * 1527 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1528 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! 1529 * (This is likely to be a bug in the hardware. Obviously, most people 1530 * only have one initiator per SCSI bus.) 1531 * Instead let this fail and have the timer make sure the command is 1532 * tried again after a short time 1533 */ 1534 /*selto_timer (acb); */ 1535 return 1; 1536 } 1537 #endif 1538 if (acb->active_dcb) { 1539 dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" 1540 "command while another command (pid#%li) is active.", 1541 srb->cmd->pid, 1542 acb->active_dcb->active_srb ? 1543 acb->active_dcb->active_srb->cmd->pid : 0); 1544 return 1; 1545 } 1546 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1547 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", 1548 srb->cmd->pid); 1549 return 1; 1550 } 1551 /* Allow starting of SCSI commands half a second before we allow the mid-level 1552 * to queue them again after a reset */ 1553 if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { 1554 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1555 return 1; 1556 } 1557 1558 /* Flush FIFO */ 1559 clear_fifo(acb, "start_scsi"); 1560 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1561 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1562 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1563 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1564 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1565 1566 identify_message = dcb->identify_msg; 1567 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1568 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1569 if (srb->flag & AUTO_REQSENSE) 1570 identify_message &= 0xBF; 1571 1572 if (((srb->cmd->cmnd[0] == INQUIRY) 1573 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1574 || (srb->flag & AUTO_REQSENSE)) 1575 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1576 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1577 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1578 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1579 && (dcb->target_lun == 0)) { 1580 srb->msgout_buf[0] = identify_message; 1581 srb->msg_count = 1; 1582 scsicommand = SCMD_SEL_ATNSTOP; 1583 srb->state = SRB_MSGOUT; 1584 #ifndef SYNC_FIRST 1585 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1586 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1587 build_wdtr(acb, dcb, srb); 1588 goto no_cmd; 1589 } 1590 #endif 1591 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1592 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1593 build_sdtr(acb, dcb, srb); 1594 goto no_cmd; 1595 } 1596 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1597 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1598 build_wdtr(acb, dcb, srb); 1599 goto no_cmd; 1600 } 1601 srb->msg_count = 0; 1602 } 1603 /* Send identify message */ 1604 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1605 1606 scsicommand = SCMD_SEL_ATN; 1607 srb->state = SRB_START_; 1608 #ifndef DC395x_NO_TAGQ 1609 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1610 && (identify_message & 0xC0)) { 1611 /* Send Tag message */ 1612 u32 tag_mask = 1; 1613 u8 tag_number = 0; 1614 while (tag_mask & dcb->tag_mask 1615 && tag_number <= dcb->max_command) { 1616 tag_mask = tag_mask << 1; 1617 tag_number++; 1618 } 1619 if (tag_number >= dcb->max_command) { 1620 dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " 1621 "Out of tags target=<%02i-%i>)\n", 1622 srb->cmd->pid, srb->cmd->device->id, 1623 srb->cmd->device->lun); 1624 srb->state = SRB_READY; 1625 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1626 DO_HWRESELECT); 1627 return 1; 1628 } 1629 /* Send Tag id */ 1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1632 dcb->tag_mask |= tag_mask; 1633 srb->tag_number = tag_number; 1634 scsicommand = SCMD_SEL_ATN3; 1635 srb->state = SRB_START_; 1636 } 1637 #endif 1638 /*polling:*/ 1639 /* Send CDB ..command block ......... */ 1640 dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", 1641 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 1642 srb->cmd->cmnd[0], srb->tag_number); 1643 if (srb->flag & AUTO_REQSENSE) { 1644 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1645 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1646 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1647 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1648 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1649 sizeof(srb->cmd->sense_buffer)); 1650 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1651 } else { 1652 ptr = (u8 *)srb->cmd->cmnd; 1653 for (i = 0; i < srb->cmd->cmd_len; i++) 1654 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1655 } 1656 no_cmd: 1657 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1658 DO_HWRESELECT | DO_DATALATCH); 1659 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1660 /* 1661 * If start_scsi return 1: 1662 * we caught an interrupt (must be reset or reselection ... ) 1663 * : Let's process it first! 1664 */ 1665 dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", 1666 srb->cmd->pid, dcb->target_id, dcb->target_lun); 1667 srb->state = SRB_READY; 1668 free_tag(dcb, srb); 1669 srb->msg_count = 0; 1670 return_code = 1; 1671 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1672 } else { 1673 /* 1674 * If start_scsi returns 0: 1675 * we know that the SCSI processor is free 1676 */ 1677 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1678 dcb->active_srb = srb; 1679 acb->active_dcb = dcb; 1680 return_code = 0; 1681 /* it's important for atn stop */ 1682 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1683 DO_DATALATCH | DO_HWRESELECT); 1684 /* SCSI command */ 1685 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1686 } 1687 return return_code; 1688 } 1689 1690 1691 #define DC395x_ENABLE_MSGOUT \ 1692 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1693 srb->state |= SRB_MSGOUT 1694 1695 1696 /* abort command */ 1697 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1698 struct ScsiReqBlk *srb) 1699 { 1700 srb->msgout_buf[0] = ABORT; 1701 srb->msg_count = 1; 1702 DC395x_ENABLE_MSGOUT; 1703 srb->state &= ~SRB_MSGIN; 1704 srb->state |= SRB_MSGOUT; 1705 } 1706 1707 1708 /** 1709 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1710 * have been triggered for this card. 1711 * 1712 * @acb: a pointer to the adpter control block 1713 * @scsi_status: the status return when we checked the card 1714 **/ 1715 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1716 u16 scsi_status) 1717 { 1718 struct DeviceCtlBlk *dcb; 1719 struct ScsiReqBlk *srb; 1720 u16 phase; 1721 u8 scsi_intstatus; 1722 unsigned long flags; 1723 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1724 u16 *); 1725 1726 DC395x_LOCK_IO(acb->scsi_host, flags); 1727 1728 /* This acknowledges the IRQ */ 1729 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1730 if ((scsi_status & 0x2007) == 0x2002) 1731 dprintkl(KERN_DEBUG, 1732 "COP after COP completed? %04x\n", scsi_status); 1733 if (debug_enabled(DBG_KG)) { 1734 if (scsi_intstatus & INT_SELTIMEOUT) 1735 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1736 } 1737 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1738 1739 if (timer_pending(&acb->selto_timer)) 1740 del_timer(&acb->selto_timer); 1741 1742 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1743 disconnect(acb); /* bus free interrupt */ 1744 goto out_unlock; 1745 } 1746 if (scsi_intstatus & INT_RESELECTED) { 1747 reselect(acb); 1748 goto out_unlock; 1749 } 1750 if (scsi_intstatus & INT_SELECT) { 1751 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1752 goto out_unlock; 1753 } 1754 if (scsi_intstatus & INT_SCSIRESET) { 1755 scsi_reset_detect(acb); 1756 goto out_unlock; 1757 } 1758 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1759 dcb = acb->active_dcb; 1760 if (!dcb) { 1761 dprintkl(KERN_DEBUG, 1762 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1763 scsi_status, scsi_intstatus); 1764 goto out_unlock; 1765 } 1766 srb = dcb->active_srb; 1767 if (dcb->flag & ABORT_DEV_) { 1768 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1769 enable_msgout_abort(acb, srb); 1770 } 1771 1772 /* software sequential machine */ 1773 phase = (u16)srb->scsi_phase; 1774 1775 /* 1776 * 62037 or 62137 1777 * call dc395x_scsi_phase0[]... "phase entry" 1778 * handle every phase before start transfer 1779 */ 1780 /* data_out_phase0, phase:0 */ 1781 /* data_in_phase0, phase:1 */ 1782 /* command_phase0, phase:2 */ 1783 /* status_phase0, phase:3 */ 1784 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1785 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1786 /* msgout_phase0, phase:6 */ 1787 /* msgin_phase0, phase:7 */ 1788 dc395x_statev = dc395x_scsi_phase0[phase]; 1789 dc395x_statev(acb, srb, &scsi_status); 1790 1791 /* 1792 * if there were any exception occured scsi_status 1793 * will be modify to bus free phase new scsi_status 1794 * transfer out from ... previous dc395x_statev 1795 */ 1796 srb->scsi_phase = scsi_status & PHASEMASK; 1797 phase = (u16)scsi_status & PHASEMASK; 1798 1799 /* 1800 * call dc395x_scsi_phase1[]... "phase entry" handle 1801 * every phase to do transfer 1802 */ 1803 /* data_out_phase1, phase:0 */ 1804 /* data_in_phase1, phase:1 */ 1805 /* command_phase1, phase:2 */ 1806 /* status_phase1, phase:3 */ 1807 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1808 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1809 /* msgout_phase1, phase:6 */ 1810 /* msgin_phase1, phase:7 */ 1811 dc395x_statev = dc395x_scsi_phase1[phase]; 1812 dc395x_statev(acb, srb, &scsi_status); 1813 } 1814 out_unlock: 1815 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1816 } 1817 1818 1819 static irqreturn_t dc395x_interrupt(int irq, void *dev_id, 1820 struct pt_regs *regs) 1821 { 1822 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id; 1823 u16 scsi_status; 1824 u8 dma_status; 1825 irqreturn_t handled = IRQ_NONE; 1826 1827 /* 1828 * Check for pending interupt 1829 */ 1830 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1831 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1832 if (scsi_status & SCSIINTERRUPT) { 1833 /* interupt pending - let's process it! */ 1834 dc395x_handle_interrupt(acb, scsi_status); 1835 handled = IRQ_HANDLED; 1836 } 1837 else if (dma_status & 0x20) { 1838 /* Error from the DMA engine */ 1839 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1840 #if 0 1841 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1842 if (acb->active_dcb) { 1843 acb->active_dcb-> flag |= ABORT_DEV_; 1844 if (acb->active_dcb->active_srb) 1845 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1846 } 1847 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1848 #else 1849 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1850 acb = NULL; 1851 #endif 1852 handled = IRQ_HANDLED; 1853 } 1854 1855 return handled; 1856 } 1857 1858 1859 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1860 u16 *pscsi_status) 1861 { 1862 dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid); 1863 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1864 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1865 1866 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1867 srb->state &= ~SRB_MSGOUT; 1868 } 1869 1870 1871 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1872 u16 *pscsi_status) 1873 { 1874 u16 i; 1875 u8 *ptr; 1876 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid); 1877 1878 clear_fifo(acb, "msgout_phase1"); 1879 if (!(srb->state & SRB_MSGOUT)) { 1880 srb->state |= SRB_MSGOUT; 1881 dprintkl(KERN_DEBUG, 1882 "msgout_phase1: (pid#%li) Phase unexpected\n", 1883 srb->cmd->pid); /* So what ? */ 1884 } 1885 if (!srb->msg_count) { 1886 dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", 1887 srb->cmd->pid); 1888 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1889 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1890 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1891 return; 1892 } 1893 ptr = (u8 *)srb->msgout_buf; 1894 for (i = 0; i < srb->msg_count; i++) 1895 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1896 srb->msg_count = 0; 1897 if (srb->msgout_buf[0] == MSG_ABORT) 1898 srb->state = SRB_ABORT_SENT; 1899 1900 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1901 } 1902 1903 1904 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1905 u16 *pscsi_status) 1906 { 1907 dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid); 1908 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1909 } 1910 1911 1912 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1913 u16 *pscsi_status) 1914 { 1915 struct DeviceCtlBlk *dcb; 1916 u8 *ptr; 1917 u16 i; 1918 dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid); 1919 1920 clear_fifo(acb, "command_phase1"); 1921 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1922 if (!(srb->flag & AUTO_REQSENSE)) { 1923 ptr = (u8 *)srb->cmd->cmnd; 1924 for (i = 0; i < srb->cmd->cmd_len; i++) { 1925 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1926 ptr++; 1927 } 1928 } else { 1929 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1930 dcb = acb->active_dcb; 1931 /* target id */ 1932 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1933 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1934 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1935 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 1936 sizeof(srb->cmd->sense_buffer)); 1937 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1938 } 1939 srb->state |= SRB_COMMAND; 1940 /* it's important for atn stop */ 1941 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1942 /* SCSI command */ 1943 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1944 } 1945 1946 1947 /* 1948 * Verify that the remaining space in the hw sg lists is the same as 1949 * the count of remaining bytes in srb->total_xfer_length 1950 */ 1951 static void sg_verify_length(struct ScsiReqBlk *srb) 1952 { 1953 if (debug_enabled(DBG_SG)) { 1954 unsigned len = 0; 1955 unsigned idx = srb->sg_index; 1956 struct SGentry *psge = srb->segment_x + idx; 1957 for (; idx < srb->sg_count; psge++, idx++) 1958 len += psge->length; 1959 if (len != srb->total_xfer_length) 1960 dprintkdbg(DBG_SG, 1961 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1962 srb->total_xfer_length, len); 1963 } 1964 } 1965 1966 1967 /* 1968 * Compute the next Scatter Gather list index and adjust its length 1969 * and address if necessary; also compute virt_addr 1970 */ 1971 static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1972 { 1973 u8 idx; 1974 struct scatterlist *sg; 1975 struct scsi_cmnd *cmd = srb->cmd; 1976 int segment = cmd->use_sg; 1977 u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ 1978 struct SGentry *psge = srb->segment_x + srb->sg_index; 1979 void **virt = srb->virt_map; 1980 1981 dprintkdbg(DBG_0, 1982 "sg_update_list: Transfered %i of %i bytes, %i remain\n", 1983 xferred, srb->total_xfer_length, left); 1984 if (xferred == 0) { 1985 /* nothing to update since we did not transfer any data */ 1986 return; 1987 } 1988 1989 sg_verify_length(srb); 1990 srb->total_xfer_length = left; /* update remaining count */ 1991 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1992 if (xferred >= psge->length) { 1993 /* Complete SG entries done */ 1994 xferred -= psge->length; 1995 } else { 1996 /* Partial SG entry done */ 1997 psge->length -= xferred; 1998 psge->address += xferred; 1999 srb->sg_index = idx; 2000 pci_dma_sync_single_for_device(srb->dcb-> 2001 acb->dev, 2002 srb->sg_bus_addr, 2003 SEGMENTX_LEN, 2004 PCI_DMA_TODEVICE); 2005 break; 2006 } 2007 psge++; 2008 } 2009 sg_verify_length(srb); 2010 2011 /* we need the corresponding virtual address */ 2012 if (!segment) { 2013 srb->virt_addr += xferred; 2014 return; 2015 } 2016 2017 /* We have to walk the scatterlist to find it */ 2018 sg = (struct scatterlist *)cmd->request_buffer; 2019 idx = 0; 2020 while (segment--) { 2021 unsigned long mask = 2022 ~((unsigned long)sg->length - 1) & PAGE_MASK; 2023 if ((sg_dma_address(sg) & mask) == (psge->address & mask)) { 2024 srb->virt_addr = virt[idx] + (psge->address & ~PAGE_MASK); 2025 return; 2026 } 2027 ++sg; 2028 ++idx; 2029 } 2030 2031 dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n"); 2032 srb->virt_addr = NULL; 2033 } 2034 2035 2036 /* 2037 * We have transfered a single byte (PIO mode?) and need to update 2038 * the count of bytes remaining (total_xfer_length) and update the sg 2039 * entry to either point to next byte in the current sg entry, or of 2040 * already at the end to point to the start of the next sg entry 2041 */ 2042 static void sg_subtract_one(struct ScsiReqBlk *srb) 2043 { 2044 srb->total_xfer_length--; 2045 srb->segment_x[srb->sg_index].length--; 2046 if (srb->total_xfer_length && 2047 !srb->segment_x[srb->sg_index].length) { 2048 if (debug_enabled(DBG_PIO)) 2049 printk(" (next segment)"); 2050 srb->sg_index++; 2051 sg_update_list(srb, srb->total_xfer_length); 2052 } 2053 } 2054 2055 2056 /* 2057 * cleanup_after_transfer 2058 * 2059 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2060 * KG: Currently called from StatusPhase1 () 2061 * Should probably also be called from other places 2062 * Best might be to call it in DataXXPhase0, if new phase will differ 2063 */ 2064 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2065 struct ScsiReqBlk *srb) 2066 { 2067 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2068 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2069 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2070 clear_fifo(acb, "cleanup/in"); 2071 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2072 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2073 } else { /* write */ 2074 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2075 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2076 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2077 clear_fifo(acb, "cleanup/out"); 2078 } 2079 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2080 } 2081 2082 2083 /* 2084 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO 2085 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2086 */ 2087 #define DC395x_LASTPIO 4 2088 2089 2090 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2091 u16 *pscsi_status) 2092 { 2093 struct DeviceCtlBlk *dcb = srb->dcb; 2094 u16 scsi_status = *pscsi_status; 2095 u32 d_left_counter = 0; 2096 dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", 2097 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2098 2099 /* 2100 * KG: We need to drain the buffers before we draw any conclusions! 2101 * This means telling the DMA to push the rest into SCSI, telling 2102 * SCSI to push the rest to the bus. 2103 * However, the device might have been the one to stop us (phase 2104 * change), and the data in transit just needs to be accounted so 2105 * it can be retransmitted.) 2106 */ 2107 /* 2108 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2109 * If we need more data, the DMA SG list will be freshly set up, anyway 2110 */ 2111 dprintkdbg(DBG_PIO, "data_out_phase0: " 2112 "DMA{fifcnt=0x%02x fifostat=0x%02x} " 2113 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2114 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2115 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2116 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2117 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2118 srb->total_xfer_length); 2119 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2120 2121 if (!(srb->state & SRB_XFERPAD)) { 2122 if (scsi_status & PARITYERROR) 2123 srb->status |= PARITY_ERROR; 2124 2125 /* 2126 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2127 * is the no of bytes it got from the DMA engine not the no it 2128 * transferred successfully to the device. (And the difference could 2129 * be as much as the FIFO size, I guess ...) 2130 */ 2131 if (!(scsi_status & SCSIXFERDONE)) { 2132 /* 2133 * when data transfer from DMA FIFO to SCSI FIFO 2134 * if there was some data left in SCSI FIFO 2135 */ 2136 d_left_counter = 2137 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2138 0x1F); 2139 if (dcb->sync_period & WIDE_SYNC) 2140 d_left_counter <<= 1; 2141 2142 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2143 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2144 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2145 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2146 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2147 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2148 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2149 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2150 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2151 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2152 } 2153 /* 2154 * calculate all the residue data that not yet transfered 2155 * SCSI transfer counter + left in SCSI FIFO data 2156 * 2157 * .....TRM_S1040_SCSI_COUNTER (24bits) 2158 * The counter always decrement by one for every SCSI byte transfer. 2159 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2160 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2161 */ 2162 if (srb->total_xfer_length > DC395x_LASTPIO) 2163 d_left_counter += 2164 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2165 2166 /* Is this a good idea? */ 2167 /*clear_fifo(acb, "DOP1"); */ 2168 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2169 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2170 && srb->cmd->request_bufflen % 2) { 2171 d_left_counter = 0; 2172 dprintkl(KERN_INFO, 2173 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2174 scsi_status); 2175 } 2176 /* 2177 * KG: Oops again. Same thinko as above: The SCSI might have been 2178 * faster than the DMA engine, so that it ran out of data. 2179 * In that case, we have to do just nothing! 2180 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2181 */ 2182 /* 2183 * KG: This is nonsense: We have been WRITING data to the bus 2184 * If the SCSI engine has no bytes left, how should the DMA engine? 2185 */ 2186 if (d_left_counter == 0) { 2187 srb->total_xfer_length = 0; 2188 } else { 2189 /* 2190 * if transfer not yet complete 2191 * there were some data residue in SCSI FIFO or 2192 * SCSI transfer counter not empty 2193 */ 2194 long oldxferred = 2195 srb->total_xfer_length - d_left_counter; 2196 const int diff = 2197 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2198 sg_update_list(srb, d_left_counter); 2199 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2200 if ((srb->segment_x[srb->sg_index].length == 2201 diff && srb->cmd->use_sg) 2202 || ((oldxferred & ~PAGE_MASK) == 2203 (PAGE_SIZE - diff)) 2204 ) { 2205 dprintkl(KERN_INFO, "data_out_phase0: " 2206 "Work around chip bug (%i)?\n", diff); 2207 d_left_counter = 2208 srb->total_xfer_length - diff; 2209 sg_update_list(srb, d_left_counter); 2210 /*srb->total_xfer_length -= diff; */ 2211 /*srb->virt_addr += diff; */ 2212 /*if (srb->cmd->use_sg) */ 2213 /* srb->sg_index++; */ 2214 } 2215 } 2216 } 2217 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2218 cleanup_after_transfer(acb, srb); 2219 } 2220 } 2221 2222 2223 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2224 u16 *pscsi_status) 2225 { 2226 dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", 2227 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2228 clear_fifo(acb, "data_out_phase1"); 2229 /* do prepare before transfer when data out phase */ 2230 data_io_transfer(acb, srb, XFERDATAOUT); 2231 } 2232 2233 2234 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2235 u16 *pscsi_status) 2236 { 2237 u16 scsi_status = *pscsi_status; 2238 u32 d_left_counter = 0; 2239 dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", 2240 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2241 2242 /* 2243 * KG: DataIn is much more tricky than DataOut. When the device is finished 2244 * and switches to another phase, the SCSI engine should be finished too. 2245 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2246 * engine and transferred to memory. 2247 * We should wait for the FIFOs to be emptied by that (is there any way to 2248 * enforce this?) and then stop the DMA engine, because it might think, that 2249 * there are more bytes to follow. Yes, the device might disconnect prior to 2250 * having all bytes transferred! 2251 * Also we should make sure that all data from the DMA engine buffer's really 2252 * made its way to the system memory! Some documentation on this would not 2253 * seem to be a bad idea, actually. 2254 */ 2255 if (!(srb->state & SRB_XFERPAD)) { 2256 if (scsi_status & PARITYERROR) { 2257 dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " 2258 "Parity Error\n", srb->cmd->pid); 2259 srb->status |= PARITY_ERROR; 2260 } 2261 /* 2262 * KG: We should wait for the DMA FIFO to be empty ... 2263 * but: it would be better to wait first for the SCSI FIFO and then the 2264 * the DMA FIFO to become empty? How do we know, that the device not already 2265 * sent data to the FIFO in a MsgIn phase, eg.? 2266 */ 2267 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2268 #if 0 2269 int ctr = 6000000; 2270 dprintkl(KERN_DEBUG, 2271 "DIP0: Wait for DMA FIFO to flush ...\n"); 2272 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2273 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2274 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2275 while (! 2276 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2277 0x80) && --ctr); 2278 if (ctr < 6000000 - 1) 2279 dprintkl(KERN_DEBUG 2280 "DIP0: Had to wait for DMA ...\n"); 2281 if (!ctr) 2282 dprintkl(KERN_ERR, 2283 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2284 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2285 #endif 2286 dprintkdbg(DBG_KG, "data_in_phase0: " 2287 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2288 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2289 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2290 } 2291 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2292 d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER) 2293 + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f) 2294 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2295 0)); 2296 dprintkdbg(DBG_KG, "data_in_phase0: " 2297 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2298 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2299 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2300 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2301 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2302 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2303 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2304 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2305 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2306 srb->total_xfer_length, d_left_counter); 2307 #if DC395x_LASTPIO 2308 /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ 2309 if (d_left_counter 2310 && srb->total_xfer_length <= DC395x_LASTPIO) { 2311 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2312 /*sg_update_list (srb, d_left_counter); */ 2313 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to " 2314 "%p for remaining %i bytes:", 2315 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f, 2316 (srb->dcb->sync_period & WIDE_SYNC) ? 2317 "words" : "bytes", 2318 srb->virt_addr, 2319 srb->total_xfer_length); 2320 if (srb->dcb->sync_period & WIDE_SYNC) 2321 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2322 CFG2_WIDEFIFO); 2323 while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) { 2324 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2325 *(srb->virt_addr)++ = byte; 2326 if (debug_enabled(DBG_PIO)) 2327 printk(" %02x", byte); 2328 d_left_counter--; 2329 sg_subtract_one(srb); 2330 } 2331 if (srb->dcb->sync_period & WIDE_SYNC) { 2332 #if 1 2333 /* Read the last byte ... */ 2334 if (srb->total_xfer_length > 0) { 2335 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2336 *(srb->virt_addr)++ = byte; 2337 srb->total_xfer_length--; 2338 if (debug_enabled(DBG_PIO)) 2339 printk(" %02x", byte); 2340 } 2341 #endif 2342 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2343 } 2344 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2345 /*srb->total_xfer_length = 0; */ 2346 if (debug_enabled(DBG_PIO)) 2347 printk("\n"); 2348 } 2349 #endif /* DC395x_LASTPIO */ 2350 2351 #if 0 2352 /* 2353 * KG: This was in DATAOUT. Does it also belong here? 2354 * Nobody seems to know what counter and fifo_cnt count exactly ... 2355 */ 2356 if (!(scsi_status & SCSIXFERDONE)) { 2357 /* 2358 * when data transfer from DMA FIFO to SCSI FIFO 2359 * if there was some data left in SCSI FIFO 2360 */ 2361 d_left_counter = 2362 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2363 0x1F); 2364 if (srb->dcb->sync_period & WIDE_SYNC) 2365 d_left_counter <<= 1; 2366 /* 2367 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2368 * so need to *= 2 2369 * KG: Seems to be correct ... 2370 */ 2371 } 2372 #endif 2373 /* KG: This should not be needed any more! */ 2374 if (d_left_counter == 0 2375 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2376 #if 0 2377 int ctr = 6000000; 2378 u8 TempDMAstatus; 2379 do { 2380 TempDMAstatus = 2381 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2382 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2383 if (!ctr) 2384 dprintkl(KERN_ERR, 2385 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2386 srb->total_xfer_length = 0; 2387 #endif 2388 srb->total_xfer_length = d_left_counter; 2389 } else { /* phase changed */ 2390 /* 2391 * parsing the case: 2392 * when a transfer not yet complete 2393 * but be disconnected by target 2394 * if transfer not yet complete 2395 * there were some data residue in SCSI FIFO or 2396 * SCSI transfer counter not empty 2397 */ 2398 sg_update_list(srb, d_left_counter); 2399 } 2400 } 2401 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2402 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2403 cleanup_after_transfer(acb, srb); 2404 } 2405 } 2406 2407 2408 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2409 u16 *pscsi_status) 2410 { 2411 dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", 2412 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2413 data_io_transfer(acb, srb, XFERDATAIN); 2414 } 2415 2416 2417 static void data_io_transfer(struct AdapterCtlBlk *acb, 2418 struct ScsiReqBlk *srb, u16 io_dir) 2419 { 2420 struct DeviceCtlBlk *dcb = srb->dcb; 2421 u8 bval; 2422 dprintkdbg(DBG_0, 2423 "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2424 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, 2425 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2426 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2427 if (srb == acb->tmp_srb) 2428 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2429 if (srb->sg_index >= srb->sg_count) { 2430 /* can't happen? out of bounds error */ 2431 return; 2432 } 2433 2434 if (srb->total_xfer_length > DC395x_LASTPIO) { 2435 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2436 /* 2437 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2438 * Maybe, even ABORTXFER would be appropriate 2439 */ 2440 if (dma_status & XFERPENDING) { 2441 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2442 "Expect trouble!\n"); 2443 dump_register_info(acb, dcb, srb); 2444 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2445 } 2446 /* clear_fifo(acb, "IO"); */ 2447 /* 2448 * load what physical address of Scatter/Gather list table 2449 * want to be transfer 2450 */ 2451 srb->state |= SRB_DATA_XFER; 2452 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2453 if (srb->cmd->use_sg) { /* with S/G */ 2454 io_dir |= DMACMD_SG; 2455 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2456 srb->sg_bus_addr + 2457 sizeof(struct SGentry) * 2458 srb->sg_index); 2459 /* load how many bytes in the sg list table */ 2460 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2461 ((u32)(srb->sg_count - 2462 srb->sg_index) << 3)); 2463 } else { /* without S/G */ 2464 io_dir &= ~DMACMD_SG; 2465 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2466 srb->segment_x[0].address); 2467 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2468 srb->segment_x[0].length); 2469 } 2470 /* load total transfer length (24bits) max value 16Mbyte */ 2471 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2472 srb->total_xfer_length); 2473 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2474 if (io_dir & DMACMD_DIR) { /* read */ 2475 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2476 SCMD_DMA_IN); 2477 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2478 } else { 2479 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2480 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2481 SCMD_DMA_OUT); 2482 } 2483 2484 } 2485 #if DC395x_LASTPIO 2486 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2487 /* 2488 * load what physical address of Scatter/Gather list table 2489 * want to be transfer 2490 */ 2491 srb->state |= SRB_DATA_XFER; 2492 /* load total transfer length (24bits) max value 16Mbyte */ 2493 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2494 srb->total_xfer_length); 2495 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2496 if (io_dir & DMACMD_DIR) { /* read */ 2497 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2498 SCMD_FIFO_IN); 2499 } else { /* write */ 2500 int ln = srb->total_xfer_length; 2501 if (srb->dcb->sync_period & WIDE_SYNC) 2502 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2503 CFG2_WIDEFIFO); 2504 dprintkdbg(DBG_PIO, 2505 "data_io_transfer: PIO %i bytes from %p:", 2506 srb->total_xfer_length, srb->virt_addr); 2507 2508 while (srb->total_xfer_length) { 2509 if (debug_enabled(DBG_PIO)) 2510 printk(" %02x", (unsigned char) *(srb->virt_addr)); 2511 2512 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 2513 *(srb->virt_addr)++); 2514 2515 sg_subtract_one(srb); 2516 } 2517 if (srb->dcb->sync_period & WIDE_SYNC) { 2518 if (ln % 2) { 2519 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2520 if (debug_enabled(DBG_PIO)) 2521 printk(" |00"); 2522 } 2523 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2524 } 2525 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2526 if (debug_enabled(DBG_PIO)) 2527 printk("\n"); 2528 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2529 SCMD_FIFO_OUT); 2530 } 2531 } 2532 #endif /* DC395x_LASTPIO */ 2533 else { /* xfer pad */ 2534 u8 data = 0, data2 = 0; 2535 if (srb->sg_count) { 2536 srb->adapter_status = H_OVER_UNDER_RUN; 2537 srb->status |= OVER_RUN; 2538 } 2539 /* 2540 * KG: despite the fact that we are using 16 bits I/O ops 2541 * the SCSI FIFO is only 8 bits according to the docs 2542 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2543 */ 2544 if (dcb->sync_period & WIDE_SYNC) { 2545 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2546 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2547 CFG2_WIDEFIFO); 2548 if (io_dir & DMACMD_DIR) { 2549 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2550 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2551 } else { 2552 /* Danger, Robinson: If you find KGs 2553 * scattered over the wide disk, the driver 2554 * or chip is to blame :-( */ 2555 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2556 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2557 } 2558 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2559 } else { 2560 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2561 /* Danger, Robinson: If you find a collection of Ks on your disk 2562 * something broke :-( */ 2563 if (io_dir & DMACMD_DIR) 2564 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2565 else 2566 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2567 } 2568 srb->state |= SRB_XFERPAD; 2569 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2570 /* SCSI command */ 2571 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2572 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2573 } 2574 } 2575 2576 2577 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2578 u16 *pscsi_status) 2579 { 2580 dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", 2581 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2582 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2583 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2584 srb->state = SRB_COMPLETED; 2585 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2586 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2587 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2588 } 2589 2590 2591 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2592 u16 *pscsi_status) 2593 { 2594 dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", 2595 srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); 2596 srb->state = SRB_STATUS; 2597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2598 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2599 } 2600 2601 2602 /* Check if the message is complete */ 2603 static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2604 { 2605 if (*msgbuf == EXTENDED_MESSAGE) { 2606 if (len < 2) 2607 return 0; 2608 if (len < msgbuf[1] + 2) 2609 return 0; 2610 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2611 if (len < 2) 2612 return 0; 2613 return 1; 2614 } 2615 2616 /* reject_msg */ 2617 static inline void msgin_reject(struct AdapterCtlBlk *acb, 2618 struct ScsiReqBlk *srb) 2619 { 2620 srb->msgout_buf[0] = MESSAGE_REJECT; 2621 srb->msg_count = 1; 2622 DC395x_ENABLE_MSGOUT; 2623 srb->state &= ~SRB_MSGIN; 2624 srb->state |= SRB_MSGOUT; 2625 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2626 srb->msgin_buf[0], 2627 srb->dcb->target_id, srb->dcb->target_lun); 2628 } 2629 2630 2631 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2632 struct DeviceCtlBlk *dcb, u8 tag) 2633 { 2634 struct ScsiReqBlk *srb = NULL; 2635 struct ScsiReqBlk *i; 2636 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", 2637 srb->cmd->pid, tag, srb); 2638 2639 if (!(dcb->tag_mask & (1 << tag))) 2640 dprintkl(KERN_DEBUG, 2641 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2642 dcb->tag_mask, tag); 2643 2644 if (list_empty(&dcb->srb_going_list)) 2645 goto mingx0; 2646 list_for_each_entry(i, &dcb->srb_going_list, list) { 2647 if (i->tag_number == tag) { 2648 srb = i; 2649 break; 2650 } 2651 } 2652 if (!srb) 2653 goto mingx0; 2654 2655 dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", 2656 srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun); 2657 if (dcb->flag & ABORT_DEV_) { 2658 /*srb->state = SRB_ABORT_SENT; */ 2659 enable_msgout_abort(acb, srb); 2660 } 2661 2662 if (!(srb->state & SRB_DISCONNECT)) 2663 goto mingx0; 2664 2665 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2666 srb->state |= dcb->active_srb->state; 2667 srb->state |= SRB_DATA_XFER; 2668 dcb->active_srb = srb; 2669 /* How can we make the DORS happy? */ 2670 return srb; 2671 2672 mingx0: 2673 srb = acb->tmp_srb; 2674 srb->state = SRB_UNEXPECT_RESEL; 2675 dcb->active_srb = srb; 2676 srb->msgout_buf[0] = MSG_ABORT_TAG; 2677 srb->msg_count = 1; 2678 DC395x_ENABLE_MSGOUT; 2679 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2680 return srb; 2681 } 2682 2683 2684 static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2685 struct DeviceCtlBlk *dcb) 2686 { 2687 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2688 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2689 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2690 set_xfer_rate(acb, dcb); 2691 } 2692 2693 2694 /* set async transfer mode */ 2695 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2696 { 2697 struct DeviceCtlBlk *dcb = srb->dcb; 2698 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2699 dcb->target_id, dcb->target_lun); 2700 2701 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2702 dcb->sync_mode |= SYNC_NEGO_DONE; 2703 /*dcb->sync_period &= 0; */ 2704 dcb->sync_offset = 0; 2705 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2706 srb->state &= ~SRB_DO_SYNC_NEGO; 2707 reprogram_regs(acb, dcb); 2708 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2709 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2710 build_wdtr(acb, dcb, srb); 2711 DC395x_ENABLE_MSGOUT; 2712 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2713 } 2714 } 2715 2716 2717 /* set sync transfer mode */ 2718 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2719 { 2720 struct DeviceCtlBlk *dcb = srb->dcb; 2721 u8 bval; 2722 int fact; 2723 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2724 "(%02i.%01i MHz) Offset %i\n", 2725 dcb->target_id, srb->msgin_buf[3] << 2, 2726 (250 / srb->msgin_buf[3]), 2727 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2728 srb->msgin_buf[4]); 2729 2730 if (srb->msgin_buf[4] > 15) 2731 srb->msgin_buf[4] = 15; 2732 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2733 dcb->sync_offset = 0; 2734 else if (dcb->sync_offset == 0) 2735 dcb->sync_offset = srb->msgin_buf[4]; 2736 if (srb->msgin_buf[4] > dcb->sync_offset) 2737 srb->msgin_buf[4] = dcb->sync_offset; 2738 else 2739 dcb->sync_offset = srb->msgin_buf[4]; 2740 bval = 0; 2741 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2742 || dcb->min_nego_period > 2743 clock_period[bval])) 2744 bval++; 2745 if (srb->msgin_buf[3] < clock_period[bval]) 2746 dprintkl(KERN_INFO, 2747 "msgin_set_sync: Increase sync nego period to %ins\n", 2748 clock_period[bval] << 2); 2749 srb->msgin_buf[3] = clock_period[bval]; 2750 dcb->sync_period &= 0xf0; 2751 dcb->sync_period |= ALT_SYNC | bval; 2752 dcb->min_nego_period = srb->msgin_buf[3]; 2753 2754 if (dcb->sync_period & WIDE_SYNC) 2755 fact = 500; 2756 else 2757 fact = 250; 2758 2759 dprintkl(KERN_INFO, 2760 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2761 dcb->target_id, (fact == 500) ? "Wide16" : "", 2762 dcb->min_nego_period << 2, dcb->sync_offset, 2763 (fact / dcb->min_nego_period), 2764 ((fact % dcb->min_nego_period) * 10 + 2765 dcb->min_nego_period / 2) / dcb->min_nego_period); 2766 2767 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2768 /* Reply with corrected SDTR Message */ 2769 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2770 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2771 2772 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2773 srb->msg_count = 5; 2774 DC395x_ENABLE_MSGOUT; 2775 dcb->sync_mode |= SYNC_NEGO_DONE; 2776 } else { 2777 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2778 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2779 build_wdtr(acb, dcb, srb); 2780 DC395x_ENABLE_MSGOUT; 2781 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2782 } 2783 } 2784 srb->state &= ~SRB_DO_SYNC_NEGO; 2785 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2786 2787 reprogram_regs(acb, dcb); 2788 } 2789 2790 2791 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2792 struct ScsiReqBlk *srb) 2793 { 2794 struct DeviceCtlBlk *dcb = srb->dcb; 2795 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2796 2797 dcb->sync_period &= ~WIDE_SYNC; 2798 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2799 dcb->sync_mode |= WIDE_NEGO_DONE; 2800 srb->state &= ~SRB_DO_WIDE_NEGO; 2801 reprogram_regs(acb, dcb); 2802 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2803 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2804 build_sdtr(acb, dcb, srb); 2805 DC395x_ENABLE_MSGOUT; 2806 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2807 } 2808 } 2809 2810 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2811 { 2812 struct DeviceCtlBlk *dcb = srb->dcb; 2813 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2814 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2815 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2816 2817 if (srb->msgin_buf[3] > wide) 2818 srb->msgin_buf[3] = wide; 2819 /* Completed */ 2820 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2821 dprintkl(KERN_DEBUG, 2822 "msgin_set_wide: Wide nego initiated <%02i>\n", 2823 dcb->target_id); 2824 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2825 srb->msg_count = 4; 2826 srb->state |= SRB_DO_WIDE_NEGO; 2827 DC395x_ENABLE_MSGOUT; 2828 } 2829 2830 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2831 if (srb->msgin_buf[3] > 0) 2832 dcb->sync_period |= WIDE_SYNC; 2833 else 2834 dcb->sync_period &= ~WIDE_SYNC; 2835 srb->state &= ~SRB_DO_WIDE_NEGO; 2836 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2837 dprintkdbg(DBG_1, 2838 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2839 (8 << srb->msgin_buf[3]), dcb->target_id); 2840 reprogram_regs(acb, dcb); 2841 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2842 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2843 build_sdtr(acb, dcb, srb); 2844 DC395x_ENABLE_MSGOUT; 2845 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2846 } 2847 } 2848 2849 2850 /* 2851 * extended message codes: 2852 * 2853 * code description 2854 * 2855 * 02h Reserved 2856 * 00h MODIFY DATA POINTER 2857 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2858 * 03h WIDE DATA TRANSFER REQUEST 2859 * 04h - 7Fh Reserved 2860 * 80h - FFh Vendor specific 2861 */ 2862 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2863 u16 *pscsi_status) 2864 { 2865 struct DeviceCtlBlk *dcb = acb->active_dcb; 2866 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid); 2867 2868 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2869 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2870 /* Now eval the msg */ 2871 switch (srb->msgin_buf[0]) { 2872 case DISCONNECT: 2873 srb->state = SRB_DISCONNECT; 2874 break; 2875 2876 case SIMPLE_QUEUE_TAG: 2877 case HEAD_OF_QUEUE_TAG: 2878 case ORDERED_QUEUE_TAG: 2879 srb = 2880 msgin_qtag(acb, dcb, 2881 srb->msgin_buf[1]); 2882 break; 2883 2884 case MESSAGE_REJECT: 2885 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2886 DO_CLRATN | DO_DATALATCH); 2887 /* A sync nego message was rejected ! */ 2888 if (srb->state & SRB_DO_SYNC_NEGO) { 2889 msgin_set_async(acb, srb); 2890 break; 2891 } 2892 /* A wide nego message was rejected ! */ 2893 if (srb->state & SRB_DO_WIDE_NEGO) { 2894 msgin_set_nowide(acb, srb); 2895 break; 2896 } 2897 enable_msgout_abort(acb, srb); 2898 /*srb->state |= SRB_ABORT_SENT */ 2899 break; 2900 2901 case EXTENDED_MESSAGE: 2902 /* SDTR */ 2903 if (srb->msgin_buf[1] == 3 2904 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2905 msgin_set_sync(acb, srb); 2906 break; 2907 } 2908 /* WDTR */ 2909 if (srb->msgin_buf[1] == 2 2910 && srb->msgin_buf[2] == EXTENDED_WDTR 2911 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2912 msgin_set_wide(acb, srb); 2913 break; 2914 } 2915 msgin_reject(acb, srb); 2916 break; 2917 2918 case MSG_IGNOREWIDE: 2919 /* Discard wide residual */ 2920 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2921 break; 2922 2923 case COMMAND_COMPLETE: 2924 /* nothing has to be done */ 2925 break; 2926 2927 case SAVE_POINTERS: 2928 /* 2929 * SAVE POINTER may be ignored as we have the struct 2930 * ScsiReqBlk* associated with the scsi command. 2931 */ 2932 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2933 "SAVE POINTER rem=%i Ignore\n", 2934 srb->cmd->pid, srb->total_xfer_length); 2935 break; 2936 2937 case RESTORE_POINTERS: 2938 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2939 break; 2940 2941 case ABORT: 2942 dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " 2943 "<%02i-%i> ABORT msg\n", 2944 srb->cmd->pid, dcb->target_id, 2945 dcb->target_lun); 2946 dcb->flag |= ABORT_DEV_; 2947 enable_msgout_abort(acb, srb); 2948 break; 2949 2950 default: 2951 /* reject unknown messages */ 2952 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2953 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2954 srb->msg_count = 1; 2955 srb->msgout_buf[0] = dcb->identify_msg; 2956 DC395x_ENABLE_MSGOUT; 2957 srb->state |= SRB_MSGOUT; 2958 /*break; */ 2959 } 2960 msgin_reject(acb, srb); 2961 } 2962 2963 /* Clear counter and MsgIn state */ 2964 srb->state &= ~SRB_MSGIN; 2965 acb->msg_len = 0; 2966 } 2967 *pscsi_status = PH_BUS_FREE; 2968 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2969 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2970 } 2971 2972 2973 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2974 u16 *pscsi_status) 2975 { 2976 dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid); 2977 clear_fifo(acb, "msgin_phase1"); 2978 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2979 if (!(srb->state & SRB_MSGIN)) { 2980 srb->state &= ~SRB_DISCONNECT; 2981 srb->state |= SRB_MSGIN; 2982 } 2983 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2984 /* SCSI command */ 2985 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2986 } 2987 2988 2989 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2990 u16 *pscsi_status) 2991 { 2992 } 2993 2994 2995 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2996 u16 *pscsi_status) 2997 { 2998 } 2999 3000 3001 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3002 { 3003 struct DeviceCtlBlk *i; 3004 3005 /* set all lun device's period, offset */ 3006 if (dcb->identify_msg & 0x07) 3007 return; 3008 3009 if (acb->scan_devices) { 3010 current_sync_offset = dcb->sync_offset; 3011 return; 3012 } 3013 3014 list_for_each_entry(i, &acb->dcb_list, list) 3015 if (i->target_id == dcb->target_id) { 3016 i->sync_period = dcb->sync_period; 3017 i->sync_offset = dcb->sync_offset; 3018 i->sync_mode = dcb->sync_mode; 3019 i->min_nego_period = dcb->min_nego_period; 3020 } 3021 } 3022 3023 3024 static void disconnect(struct AdapterCtlBlk *acb) 3025 { 3026 struct DeviceCtlBlk *dcb = acb->active_dcb; 3027 struct ScsiReqBlk *srb; 3028 3029 if (!dcb) { 3030 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3031 udelay(500); 3032 /* Suspend queue for a while */ 3033 acb->scsi_host->last_reset = 3034 jiffies + HZ / 2 + 3035 HZ * acb->eeprom.delay_time; 3036 clear_fifo(acb, "disconnectEx"); 3037 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3038 return; 3039 } 3040 srb = dcb->active_srb; 3041 acb->active_dcb = NULL; 3042 dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid); 3043 3044 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3045 clear_fifo(acb, "disconnect"); 3046 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3047 if (srb->state & SRB_UNEXPECT_RESEL) { 3048 dprintkl(KERN_ERR, 3049 "disconnect: Unexpected reselection <%02i-%i>\n", 3050 dcb->target_id, dcb->target_lun); 3051 srb->state = 0; 3052 waiting_process_next(acb); 3053 } else if (srb->state & SRB_ABORT_SENT) { 3054 dcb->flag &= ~ABORT_DEV_; 3055 acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; 3056 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3057 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3058 waiting_process_next(acb); 3059 } else { 3060 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3061 || !(srb-> 3062 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3063 /* 3064 * Selection time out 3065 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3066 */ 3067 /* Unexp. Disc / Sel Timeout */ 3068 if (srb->state != SRB_START_ 3069 && srb->state != SRB_MSGOUT) { 3070 srb->state = SRB_READY; 3071 dprintkl(KERN_DEBUG, 3072 "disconnect: (pid#%li) Unexpected\n", 3073 srb->cmd->pid); 3074 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3075 goto disc1; 3076 } else { 3077 /* Normal selection timeout */ 3078 dprintkdbg(DBG_KG, "disconnect: (pid#%li) " 3079 "<%02i-%i> SelTO\n", srb->cmd->pid, 3080 dcb->target_id, dcb->target_lun); 3081 if (srb->retry_count++ > DC395x_MAX_RETRIES 3082 || acb->scan_devices) { 3083 srb->target_status = 3084 SCSI_STAT_SEL_TIMEOUT; 3085 goto disc1; 3086 } 3087 free_tag(dcb, srb); 3088 srb_going_to_waiting_move(dcb, srb); 3089 dprintkdbg(DBG_KG, 3090 "disconnect: (pid#%li) Retry\n", 3091 srb->cmd->pid); 3092 waiting_set_timer(acb, HZ / 20); 3093 } 3094 } else if (srb->state & SRB_DISCONNECT) { 3095 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3096 /* 3097 * SRB_DISCONNECT (This is what we expect!) 3098 */ 3099 if (bval & 0x40) { 3100 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3101 " 0x%02x: ACK set! Other controllers?\n", 3102 bval); 3103 /* It could come from another initiator, therefore don't do much ! */ 3104 } else 3105 waiting_process_next(acb); 3106 } else if (srb->state & SRB_COMPLETED) { 3107 disc1: 3108 /* 3109 ** SRB_COMPLETED 3110 */ 3111 free_tag(dcb, srb); 3112 dcb->active_srb = NULL; 3113 srb->state = SRB_FREE; 3114 srb_done(acb, dcb, srb); 3115 } 3116 } 3117 } 3118 3119 3120 static void reselect(struct AdapterCtlBlk *acb) 3121 { 3122 struct DeviceCtlBlk *dcb = acb->active_dcb; 3123 struct ScsiReqBlk *srb = NULL; 3124 u16 rsel_tar_lun_id; 3125 u8 id, lun; 3126 u8 arblostflag = 0; 3127 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3128 3129 clear_fifo(acb, "reselect"); 3130 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3131 /* Read Reselected Target ID and LUN */ 3132 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3133 if (dcb) { /* Arbitration lost but Reselection win */ 3134 srb = dcb->active_srb; 3135 if (!srb) { 3136 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3137 "but active_srb == NULL\n"); 3138 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3139 return; 3140 } 3141 /* Why the if ? */ 3142 if (!acb->scan_devices) { 3143 dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " 3144 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3145 srb->cmd->pid, dcb->target_id, 3146 dcb->target_lun, rsel_tar_lun_id, 3147 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3148 arblostflag = 1; 3149 /*srb->state |= SRB_DISCONNECT; */ 3150 3151 srb->state = SRB_READY; 3152 free_tag(dcb, srb); 3153 srb_going_to_waiting_move(dcb, srb); 3154 waiting_set_timer(acb, HZ / 20); 3155 3156 /* return; */ 3157 } 3158 } 3159 /* Read Reselected Target Id and LUN */ 3160 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3161 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3162 "Got %i!\n", rsel_tar_lun_id); 3163 id = rsel_tar_lun_id & 0xff; 3164 lun = (rsel_tar_lun_id >> 8) & 7; 3165 dcb = find_dcb(acb, id, lun); 3166 if (!dcb) { 3167 dprintkl(KERN_ERR, "reselect: From non existent device " 3168 "<%02i-%i>\n", id, lun); 3169 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3170 return; 3171 } 3172 acb->active_dcb = dcb; 3173 3174 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3175 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3176 "disconnection? <%02i-%i>\n", 3177 dcb->target_id, dcb->target_lun); 3178 3179 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3180 srb = acb->tmp_srb; 3181 dcb->active_srb = srb; 3182 } else { 3183 /* There can be only one! */ 3184 srb = dcb->active_srb; 3185 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3186 /* 3187 * abort command 3188 */ 3189 dprintkl(KERN_DEBUG, 3190 "reselect: w/o disconnected cmds <%02i-%i>\n", 3191 dcb->target_id, dcb->target_lun); 3192 srb = acb->tmp_srb; 3193 srb->state = SRB_UNEXPECT_RESEL; 3194 dcb->active_srb = srb; 3195 enable_msgout_abort(acb, srb); 3196 } else { 3197 if (dcb->flag & ABORT_DEV_) { 3198 /*srb->state = SRB_ABORT_SENT; */ 3199 enable_msgout_abort(acb, srb); 3200 } else 3201 srb->state = SRB_DATA_XFER; 3202 3203 } 3204 } 3205 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3206 3207 /* Program HA ID, target ID, period and offset */ 3208 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3209 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3210 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3211 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3212 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3213 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3214 /* SCSI command */ 3215 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3216 } 3217 3218 3219 static inline u8 tagq_blacklist(char *name) 3220 { 3221 #ifndef DC395x_NO_TAGQ 3222 #if 0 3223 u8 i; 3224 for (i = 0; i < BADDEVCNT; i++) 3225 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3226 return 1; 3227 #endif 3228 return 0; 3229 #else 3230 return 1; 3231 #endif 3232 } 3233 3234 3235 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3236 { 3237 /* Check for SCSI format (ANSI and Response data format) */ 3238 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3239 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3240 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3241 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3242 /* ((dcb->dev_type == TYPE_DISK) 3243 || (dcb->dev_type == TYPE_MOD)) && */ 3244 !tagq_blacklist(((char *)ptr) + 8)) { 3245 if (dcb->max_command == 1) 3246 dcb->max_command = 3247 dcb->acb->tag_max_num; 3248 dcb->sync_mode |= EN_TAG_QUEUEING; 3249 /*dcb->tag_mask = 0; */ 3250 } else 3251 dcb->max_command = 1; 3252 } 3253 } 3254 3255 3256 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3257 struct ScsiInqData *ptr) 3258 { 3259 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3260 dcb->dev_type = bval1; 3261 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3262 disc_tagq_set(dcb, ptr); 3263 } 3264 3265 3266 /* unmap mapped pci regions from SRB */ 3267 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3268 { 3269 struct scsi_cmnd *cmd = srb->cmd; 3270 enum dma_data_direction dir = cmd->sc_data_direction; 3271 if (cmd->use_sg && dir != PCI_DMA_NONE) { 3272 int i; 3273 /* unmap DC395x SG list */ 3274 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3275 srb->sg_bus_addr, SEGMENTX_LEN); 3276 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3277 SEGMENTX_LEN, 3278 PCI_DMA_TODEVICE); 3279 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3280 cmd->use_sg, cmd->request_buffer); 3281 /* unmap the sg segments */ 3282 for (i = 0; i < srb->sg_count; i++) 3283 kunmap(virt_to_page(srb->virt_map[i])); 3284 pci_unmap_sg(acb->dev, 3285 (struct scatterlist *)cmd->request_buffer, 3286 cmd->use_sg, dir); 3287 } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { 3288 dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", 3289 srb->segment_x[0].address, cmd->request_bufflen); 3290 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3291 cmd->request_bufflen, dir); 3292 } 3293 } 3294 3295 3296 /* unmap mapped pci sense buffer from SRB */ 3297 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3298 struct ScsiReqBlk *srb) 3299 { 3300 if (!(srb->flag & AUTO_REQSENSE)) 3301 return; 3302 /* Unmap sense buffer */ 3303 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3304 srb->segment_x[0].address); 3305 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3306 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3307 /* Restore SG stuff */ 3308 srb->total_xfer_length = srb->xferred; 3309 srb->segment_x[0].address = 3310 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3311 srb->segment_x[0].length = 3312 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3313 } 3314 3315 3316 /* 3317 * Complete execution of a SCSI command 3318 * Signal completion to the generic SCSI driver 3319 */ 3320 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3321 struct ScsiReqBlk *srb) 3322 { 3323 u8 tempcnt, status; 3324 struct scsi_cmnd *cmd = srb->cmd; 3325 struct ScsiInqData *ptr; 3326 enum dma_data_direction dir = cmd->sc_data_direction; 3327 3328 if (cmd->use_sg) { 3329 struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; 3330 ptr = (struct ScsiInqData *)(srb->virt_map[0] + sg->offset); 3331 } else { 3332 ptr = (struct ScsiInqData *)(cmd->request_buffer); 3333 } 3334 3335 dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, 3336 srb->cmd->device->id, srb->cmd->device->lun); 3337 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n", 3338 srb, cmd->use_sg, srb->sg_index, srb->sg_count, 3339 cmd->request_buffer, ptr); 3340 status = srb->target_status; 3341 if (srb->flag & AUTO_REQSENSE) { 3342 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3343 pci_unmap_srb_sense(acb, srb); 3344 /* 3345 ** target status.......................... 3346 */ 3347 srb->flag &= ~AUTO_REQSENSE; 3348 srb->adapter_status = 0; 3349 srb->target_status = CHECK_CONDITION << 1; 3350 if (debug_enabled(DBG_1)) { 3351 switch (cmd->sense_buffer[2] & 0x0f) { 3352 case NOT_READY: 3353 dprintkl(KERN_DEBUG, 3354 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3355 cmd->cmnd[0], dcb->target_id, 3356 dcb->target_lun, status, acb->scan_devices); 3357 break; 3358 case UNIT_ATTENTION: 3359 dprintkl(KERN_DEBUG, 3360 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3361 cmd->cmnd[0], dcb->target_id, 3362 dcb->target_lun, status, acb->scan_devices); 3363 break; 3364 case ILLEGAL_REQUEST: 3365 dprintkl(KERN_DEBUG, 3366 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3367 cmd->cmnd[0], dcb->target_id, 3368 dcb->target_lun, status, acb->scan_devices); 3369 break; 3370 case MEDIUM_ERROR: 3371 dprintkl(KERN_DEBUG, 3372 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3373 cmd->cmnd[0], dcb->target_id, 3374 dcb->target_lun, status, acb->scan_devices); 3375 break; 3376 case HARDWARE_ERROR: 3377 dprintkl(KERN_DEBUG, 3378 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3379 cmd->cmnd[0], dcb->target_id, 3380 dcb->target_lun, status, acb->scan_devices); 3381 break; 3382 } 3383 if (cmd->sense_buffer[7] >= 6) 3384 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3385 "(0x%08x 0x%08x)\n", 3386 cmd->sense_buffer[2], cmd->sense_buffer[12], 3387 cmd->sense_buffer[13], 3388 *((unsigned int *)(cmd->sense_buffer + 3)), 3389 *((unsigned int *)(cmd->sense_buffer + 8))); 3390 else 3391 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3392 cmd->sense_buffer[2], 3393 *((unsigned int *)(cmd->sense_buffer + 3))); 3394 } 3395 3396 if (status == (CHECK_CONDITION << 1)) { 3397 cmd->result = DID_BAD_TARGET << 16; 3398 goto ckc_e; 3399 } 3400 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3401 3402 if (srb->total_xfer_length 3403 && srb->total_xfer_length >= cmd->underflow) 3404 cmd->result = 3405 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3406 srb->end_message, CHECK_CONDITION); 3407 /*SET_RES_DID(cmd->result,DID_OK) */ 3408 else 3409 cmd->result = 3410 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3411 srb->end_message, CHECK_CONDITION); 3412 3413 goto ckc_e; 3414 } 3415 3416 /*************************************************************/ 3417 if (status) { 3418 /* 3419 * target status.......................... 3420 */ 3421 if (status_byte(status) == CHECK_CONDITION) { 3422 request_sense(acb, dcb, srb); 3423 return; 3424 } else if (status_byte(status) == QUEUE_FULL) { 3425 tempcnt = (u8)list_size(&dcb->srb_going_list); 3426 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3427 dcb->target_id, dcb->target_lun, tempcnt); 3428 if (tempcnt > 1) 3429 tempcnt--; 3430 dcb->max_command = tempcnt; 3431 free_tag(dcb, srb); 3432 srb_going_to_waiting_move(dcb, srb); 3433 waiting_set_timer(acb, HZ / 20); 3434 srb->adapter_status = 0; 3435 srb->target_status = 0; 3436 return; 3437 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3438 srb->adapter_status = H_SEL_TIMEOUT; 3439 srb->target_status = 0; 3440 cmd->result = DID_NO_CONNECT << 16; 3441 } else { 3442 srb->adapter_status = 0; 3443 SET_RES_DID(cmd->result, DID_ERROR); 3444 SET_RES_MSG(cmd->result, srb->end_message); 3445 SET_RES_TARGET(cmd->result, status); 3446 3447 } 3448 } else { 3449 /* 3450 ** process initiator status.......................... 3451 */ 3452 status = srb->adapter_status; 3453 if (status & H_OVER_UNDER_RUN) { 3454 srb->target_status = 0; 3455 SET_RES_DID(cmd->result, DID_OK); 3456 SET_RES_MSG(cmd->result, srb->end_message); 3457 } else if (srb->status & PARITY_ERROR) { 3458 SET_RES_DID(cmd->result, DID_PARITY); 3459 SET_RES_MSG(cmd->result, srb->end_message); 3460 } else { /* No error */ 3461 3462 srb->adapter_status = 0; 3463 srb->target_status = 0; 3464 SET_RES_DID(cmd->result, DID_OK); 3465 } 3466 } 3467 3468 if (dir != PCI_DMA_NONE) { 3469 if (cmd->use_sg) 3470 pci_dma_sync_sg_for_cpu(acb->dev, 3471 (struct scatterlist *)cmd-> 3472 request_buffer, cmd->use_sg, dir); 3473 else if (cmd->request_buffer) 3474 pci_dma_sync_single_for_cpu(acb->dev, 3475 srb->segment_x[0].address, 3476 cmd->request_bufflen, dir); 3477 } 3478 3479 if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY 3480 && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 3481 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3482 dcb->inquiry7 = ptr->Flags; 3483 /* Check Error Conditions */ 3484 ckc_e: 3485 3486 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3487 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3488 if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16) 3489 || status_byte(cmd-> 3490 result) & 3491 CHECK_CONDITION)) { 3492 3493 if (!dcb->init_tcq_flag) { 3494 add_dev(acb, dcb, ptr); 3495 dcb->init_tcq_flag = 1; 3496 } 3497 3498 } 3499 3500 3501 /* Here is the info for Doug Gilbert's sg3 ... */ 3502 cmd->resid = srb->total_xfer_length; 3503 /* This may be interpreted by sb. or not ... */ 3504 cmd->SCp.this_residual = srb->total_xfer_length; 3505 cmd->SCp.buffers_residual = 0; 3506 if (debug_enabled(DBG_KG)) { 3507 if (srb->total_xfer_length) 3508 dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " 3509 "cmnd=0x%02x Missed %i bytes\n", 3510 cmd->pid, cmd->device->id, cmd->device->lun, 3511 cmd->cmnd[0], srb->total_xfer_length); 3512 } 3513 3514 srb_going_remove(dcb, srb); 3515 /* Add to free list */ 3516 if (srb == acb->tmp_srb) 3517 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3518 else { 3519 dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", 3520 cmd->pid, cmd->result); 3521 srb_free_insert(acb, srb); 3522 } 3523 pci_unmap_srb(acb, srb); 3524 3525 cmd->scsi_done(cmd); 3526 waiting_process_next(acb); 3527 } 3528 3529 3530 /* abort all cmds in our queues */ 3531 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3532 struct scsi_cmnd *cmd, u8 force) 3533 { 3534 struct DeviceCtlBlk *dcb; 3535 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3536 3537 list_for_each_entry(dcb, &acb->dcb_list, list) { 3538 struct ScsiReqBlk *srb; 3539 struct ScsiReqBlk *tmp; 3540 struct scsi_cmnd *p; 3541 3542 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3543 enum dma_data_direction dir; 3544 int result; 3545 3546 p = srb->cmd; 3547 dir = p->sc_data_direction; 3548 result = MK_RES(0, did_flag, 0, 0); 3549 printk("G:%li(%02i-%i) ", p->pid, 3550 p->device->id, p->device->lun); 3551 srb_going_remove(dcb, srb); 3552 free_tag(dcb, srb); 3553 srb_free_insert(acb, srb); 3554 p->result = result; 3555 pci_unmap_srb_sense(acb, srb); 3556 pci_unmap_srb(acb, srb); 3557 if (force) { 3558 /* For new EH, we normally don't need to give commands back, 3559 * as they all complete or all time out */ 3560 p->scsi_done(p); 3561 } 3562 } 3563 if (!list_empty(&dcb->srb_going_list)) 3564 dprintkl(KERN_DEBUG, 3565 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3566 dcb->target_id, dcb->target_lun); 3567 if (dcb->tag_mask) 3568 dprintkl(KERN_DEBUG, 3569 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3570 dcb->target_id, dcb->target_lun, 3571 dcb->tag_mask); 3572 3573 /* Waiting queue */ 3574 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3575 int result; 3576 p = srb->cmd; 3577 3578 result = MK_RES(0, did_flag, 0, 0); 3579 printk("W:%li<%02i-%i>", p->pid, p->device->id, 3580 p->device->lun); 3581 srb_waiting_remove(dcb, srb); 3582 srb_free_insert(acb, srb); 3583 p->result = result; 3584 pci_unmap_srb_sense(acb, srb); 3585 pci_unmap_srb(acb, srb); 3586 if (force) { 3587 /* For new EH, we normally don't need to give commands back, 3588 * as they all complete or all time out */ 3589 cmd->scsi_done(cmd); 3590 } 3591 } 3592 if (!list_empty(&dcb->srb_waiting_list)) 3593 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3594 list_size(&dcb->srb_waiting_list), dcb->target_id, 3595 dcb->target_lun); 3596 dcb->flag &= ~ABORT_DEV_; 3597 } 3598 printk("\n"); 3599 } 3600 3601 3602 static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3603 { 3604 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3605 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3606 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3607 3608 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3609 /* nothing */; 3610 } 3611 3612 3613 static void set_basic_config(struct AdapterCtlBlk *acb) 3614 { 3615 u8 bval; 3616 u16 wval; 3617 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3618 if (acb->config & HCC_PARITY) 3619 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3620 else 3621 bval = PHASELATCH | INITIATOR | BLOCKRST; 3622 3623 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3624 3625 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3626 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3627 /* program Host ID */ 3628 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3629 /* set ansynchronous transfer */ 3630 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3631 /* Turn LED control off */ 3632 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3633 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3634 /* DMA config */ 3635 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3636 wval |= 3637 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3638 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3639 /* Clear pending interrupt status */ 3640 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3641 /* Enable SCSI interrupt */ 3642 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3643 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3644 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3645 ); 3646 } 3647 3648 3649 static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3650 { 3651 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3652 /* delay half a second */ 3653 if (timer_pending(&acb->waiting_timer)) 3654 del_timer(&acb->waiting_timer); 3655 3656 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3657 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3658 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3659 udelay(500); 3660 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3661 acb->scsi_host->last_reset = 3662 jiffies + 5 * HZ / 2 + 3663 HZ * acb->eeprom.delay_time; 3664 3665 clear_fifo(acb, "scsi_reset_detect"); 3666 set_basic_config(acb); 3667 /*1.25 */ 3668 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3669 3670 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3671 acb->acb_flag |= RESET_DONE; 3672 } else { 3673 acb->acb_flag |= RESET_DETECT; 3674 reset_dev_param(acb); 3675 doing_srb_done(acb, DID_RESET, NULL, 1); 3676 /*DC395x_RecoverSRB( acb ); */ 3677 acb->active_dcb = NULL; 3678 acb->acb_flag = 0; 3679 waiting_process_next(acb); 3680 } 3681 } 3682 3683 3684 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3685 struct ScsiReqBlk *srb) 3686 { 3687 struct scsi_cmnd *cmd = srb->cmd; 3688 dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", 3689 cmd->pid, cmd->device->id, cmd->device->lun); 3690 3691 srb->flag |= AUTO_REQSENSE; 3692 srb->adapter_status = 0; 3693 srb->target_status = 0; 3694 3695 /* KG: Can this prevent crap sense data ? */ 3696 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 3697 3698 /* Save some data */ 3699 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3700 srb->segment_x[0].address; 3701 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3702 srb->segment_x[0].length; 3703 srb->xferred = srb->total_xfer_length; 3704 /* srb->segment_x : a one entry of S/G list table */ 3705 srb->total_xfer_length = sizeof(cmd->sense_buffer); 3706 srb->segment_x[0].length = sizeof(cmd->sense_buffer); 3707 /* Map sense buffer */ 3708 srb->segment_x[0].address = 3709 pci_map_single(acb->dev, cmd->sense_buffer, 3710 sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE); 3711 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3712 cmd->sense_buffer, srb->segment_x[0].address, 3713 sizeof(cmd->sense_buffer)); 3714 srb->sg_count = 1; 3715 srb->sg_index = 0; 3716 3717 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3718 dprintkl(KERN_DEBUG, 3719 "request_sense: (pid#%li) failed <%02i-%i>\n", 3720 srb->cmd->pid, dcb->target_id, dcb->target_lun); 3721 srb_going_to_waiting_move(dcb, srb); 3722 waiting_set_timer(acb, HZ / 100); 3723 } 3724 } 3725 3726 3727 /** 3728 * device_alloc - Allocate a new device instance. This create the 3729 * devices instance and sets up all the data items. The adapter 3730 * instance is required to obtain confiuration information for this 3731 * device. This does *not* add this device to the adapters device 3732 * list. 3733 * 3734 * @acb: The adapter to obtain configuration information from. 3735 * @target: The target for the new device. 3736 * @lun: The lun for the new device. 3737 * 3738 * Return the new device if succesfull or NULL on failure. 3739 **/ 3740 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3741 u8 target, u8 lun) 3742 { 3743 struct NvRamType *eeprom = &acb->eeprom; 3744 u8 period_index = eeprom->target[target].period & 0x07; 3745 struct DeviceCtlBlk *dcb; 3746 3747 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3748 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3749 if (!dcb) 3750 return NULL; 3751 dcb->acb = NULL; 3752 INIT_LIST_HEAD(&dcb->srb_going_list); 3753 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3754 dcb->active_srb = NULL; 3755 dcb->tag_mask = 0; 3756 dcb->max_command = 1; 3757 dcb->target_id = target; 3758 dcb->target_lun = lun; 3759 #ifndef DC395x_NO_DISCONNECT 3760 dcb->identify_msg = 3761 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3762 #else 3763 dcb->identify_msg = IDENTIFY(0, lun); 3764 #endif 3765 dcb->dev_mode = eeprom->target[target].cfg0; 3766 dcb->inquiry7 = 0; 3767 dcb->sync_mode = 0; 3768 dcb->min_nego_period = clock_period[period_index]; 3769 dcb->sync_period = 0; 3770 dcb->sync_offset = 0; 3771 dcb->flag = 0; 3772 3773 #ifndef DC395x_NO_WIDE 3774 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3775 && (acb->config & HCC_WIDE_CARD)) 3776 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3777 #endif 3778 #ifndef DC395x_NO_SYNC 3779 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3780 if (!(lun) || current_sync_offset) 3781 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3782 #endif 3783 if (dcb->target_lun != 0) { 3784 /* Copy settings */ 3785 struct DeviceCtlBlk *p; 3786 list_for_each_entry(p, &acb->dcb_list, list) 3787 if (p->target_id == dcb->target_id) 3788 break; 3789 dprintkdbg(DBG_1, 3790 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3791 dcb->target_id, dcb->target_lun, 3792 p->target_id, p->target_lun); 3793 dcb->sync_mode = p->sync_mode; 3794 dcb->sync_period = p->sync_period; 3795 dcb->min_nego_period = p->min_nego_period; 3796 dcb->sync_offset = p->sync_offset; 3797 dcb->inquiry7 = p->inquiry7; 3798 } 3799 return dcb; 3800 } 3801 3802 3803 /** 3804 * adapter_add_device - Adds the device instance to the adaptor instance. 3805 * 3806 * @acb: The adapter device to be updated 3807 * @dcb: A newly created and intialised device instance to add. 3808 **/ 3809 static void adapter_add_device(struct AdapterCtlBlk *acb, 3810 struct DeviceCtlBlk *dcb) 3811 { 3812 /* backpointer to adapter */ 3813 dcb->acb = acb; 3814 3815 /* set run_robin to this device if it is currently empty */ 3816 if (list_empty(&acb->dcb_list)) 3817 acb->dcb_run_robin = dcb; 3818 3819 /* add device to list */ 3820 list_add_tail(&dcb->list, &acb->dcb_list); 3821 3822 /* update device maps */ 3823 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3824 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3825 } 3826 3827 3828 /** 3829 * adapter_remove_device - Removes the device instance from the adaptor 3830 * instance. The device instance is not check in any way or freed by this. 3831 * The caller is expected to take care of that. This will simply remove the 3832 * device from the adapters data strcutures. 3833 * 3834 * @acb: The adapter device to be updated 3835 * @dcb: A device that has previously been added to the adapter. 3836 **/ 3837 static void adapter_remove_device(struct AdapterCtlBlk *acb, 3838 struct DeviceCtlBlk *dcb) 3839 { 3840 struct DeviceCtlBlk *i; 3841 struct DeviceCtlBlk *tmp; 3842 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3843 dcb->target_id, dcb->target_lun); 3844 3845 /* fix up any pointers to this device that we have in the adapter */ 3846 if (acb->active_dcb == dcb) 3847 acb->active_dcb = NULL; 3848 if (acb->dcb_run_robin == dcb) 3849 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3850 3851 /* unlink from list */ 3852 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3853 if (dcb == i) { 3854 list_del(&i->list); 3855 break; 3856 } 3857 3858 /* clear map and children */ 3859 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3860 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3861 dcb->acb = NULL; 3862 } 3863 3864 3865 /** 3866 * adapter_remove_and_free_device - Removes a single device from the adapter 3867 * and then frees the device information. 3868 * 3869 * @acb: The adapter device to be updated 3870 * @dcb: A device that has previously been added to the adapter. 3871 */ 3872 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3873 struct DeviceCtlBlk *dcb) 3874 { 3875 if (list_size(&dcb->srb_going_list) > 1) { 3876 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3877 "Won't remove because of %i active requests.\n", 3878 dcb->target_id, dcb->target_lun, 3879 list_size(&dcb->srb_going_list)); 3880 return; 3881 } 3882 adapter_remove_device(acb, dcb); 3883 kfree(dcb); 3884 } 3885 3886 3887 /** 3888 * adapter_remove_and_free_all_devices - Removes and frees all of the 3889 * devices associated with the specified adapter. 3890 * 3891 * @acb: The adapter from which all devices should be removed. 3892 **/ 3893 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3894 { 3895 struct DeviceCtlBlk *dcb; 3896 struct DeviceCtlBlk *tmp; 3897 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3898 list_size(&acb->dcb_list)); 3899 3900 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3901 adapter_remove_and_free_device(acb, dcb); 3902 } 3903 3904 3905 /** 3906 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3907 * scsi device that we need to deal with. We allocate a new device and then 3908 * insert that device into the adapters device list. 3909 * 3910 * @scsi_device: The new scsi device that we need to handle. 3911 **/ 3912 static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3913 { 3914 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3915 struct DeviceCtlBlk *dcb; 3916 3917 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3918 if (!dcb) 3919 return -ENOMEM; 3920 adapter_add_device(acb, dcb); 3921 3922 return 0; 3923 } 3924 3925 3926 /** 3927 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3928 * device that is going away. 3929 * 3930 * @scsi_device: The new scsi device that we need to handle. 3931 **/ 3932 static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3933 { 3934 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3935 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3936 if (dcb) 3937 adapter_remove_and_free_device(acb, dcb); 3938 } 3939 3940 3941 3942 3943 /** 3944 * trms1040_wait_30us: wait for 30 us 3945 * 3946 * Waits for 30us (using the chip by the looks of it..) 3947 * 3948 * @io_port: base I/O address 3949 **/ 3950 static void __devinit trms1040_wait_30us(unsigned long io_port) 3951 { 3952 /* ScsiPortStallExecution(30); wait 30 us */ 3953 outb(5, io_port + TRM_S1040_GEN_TIMER); 3954 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3955 /* nothing */ ; 3956 } 3957 3958 3959 /** 3960 * trms1040_write_cmd - write the secified command and address to 3961 * chip 3962 * 3963 * @io_port: base I/O address 3964 * @cmd: SB + op code (command) to send 3965 * @addr: address to send 3966 **/ 3967 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3968 { 3969 int i; 3970 u8 send_data; 3971 3972 /* program SB + OP code */ 3973 for (i = 0; i < 3; i++, cmd <<= 1) { 3974 send_data = NVR_SELECT; 3975 if (cmd & 0x04) /* Start from bit 2 */ 3976 send_data |= NVR_BITOUT; 3977 3978 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3979 trms1040_wait_30us(io_port); 3980 outb((send_data | NVR_CLOCK), 3981 io_port + TRM_S1040_GEN_NVRAM); 3982 trms1040_wait_30us(io_port); 3983 } 3984 3985 /* send address */ 3986 for (i = 0; i < 7; i++, addr <<= 1) { 3987 send_data = NVR_SELECT; 3988 if (addr & 0x40) /* Start from bit 6 */ 3989 send_data |= NVR_BITOUT; 3990 3991 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3992 trms1040_wait_30us(io_port); 3993 outb((send_data | NVR_CLOCK), 3994 io_port + TRM_S1040_GEN_NVRAM); 3995 trms1040_wait_30us(io_port); 3996 } 3997 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3998 trms1040_wait_30us(io_port); 3999 } 4000 4001 4002 /** 4003 * trms1040_set_data - store a single byte in the eeprom 4004 * 4005 * Called from write all to write a single byte into the SSEEPROM 4006 * Which is done one bit at a time. 4007 * 4008 * @io_port: base I/O address 4009 * @addr: offset into EEPROM 4010 * @byte: bytes to write 4011 **/ 4012 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4013 { 4014 int i; 4015 u8 send_data; 4016 4017 /* Send write command & address */ 4018 trms1040_write_cmd(io_port, 0x05, addr); 4019 4020 /* Write data */ 4021 for (i = 0; i < 8; i++, byte <<= 1) { 4022 send_data = NVR_SELECT; 4023 if (byte & 0x80) /* Start from bit 7 */ 4024 send_data |= NVR_BITOUT; 4025 4026 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4027 trms1040_wait_30us(io_port); 4028 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4029 trms1040_wait_30us(io_port); 4030 } 4031 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4032 trms1040_wait_30us(io_port); 4033 4034 /* Disable chip select */ 4035 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4036 trms1040_wait_30us(io_port); 4037 4038 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4039 trms1040_wait_30us(io_port); 4040 4041 /* Wait for write ready */ 4042 while (1) { 4043 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4044 trms1040_wait_30us(io_port); 4045 4046 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4047 trms1040_wait_30us(io_port); 4048 4049 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4050 break; 4051 } 4052 4053 /* Disable chip select */ 4054 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4055 } 4056 4057 4058 /** 4059 * trms1040_write_all - write 128 bytes to the eeprom 4060 * 4061 * Write the supplied 128 bytes to the chips SEEPROM 4062 * 4063 * @eeprom: the data to write 4064 * @io_port: the base io port 4065 **/ 4066 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4067 { 4068 u8 *b_eeprom = (u8 *)eeprom; 4069 u8 addr; 4070 4071 /* Enable SEEPROM */ 4072 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4073 io_port + TRM_S1040_GEN_CONTROL); 4074 4075 /* write enable */ 4076 trms1040_write_cmd(io_port, 0x04, 0xFF); 4077 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4078 trms1040_wait_30us(io_port); 4079 4080 /* write */ 4081 for (addr = 0; addr < 128; addr++, b_eeprom++) 4082 trms1040_set_data(io_port, addr, *b_eeprom); 4083 4084 /* write disable */ 4085 trms1040_write_cmd(io_port, 0x04, 0x00); 4086 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4087 trms1040_wait_30us(io_port); 4088 4089 /* Disable SEEPROM */ 4090 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4091 io_port + TRM_S1040_GEN_CONTROL); 4092 } 4093 4094 4095 /** 4096 * trms1040_get_data - get a single byte from the eeprom 4097 * 4098 * Called from read all to read a single byte into the SSEEPROM 4099 * Which is done one bit at a time. 4100 * 4101 * @io_port: base I/O address 4102 * @addr: offset into SEEPROM 4103 * 4104 * Returns the the byte read. 4105 **/ 4106 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) 4107 { 4108 int i; 4109 u8 read_byte; 4110 u8 result = 0; 4111 4112 /* Send read command & address */ 4113 trms1040_write_cmd(io_port, 0x06, addr); 4114 4115 /* read data */ 4116 for (i = 0; i < 8; i++) { 4117 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4118 trms1040_wait_30us(io_port); 4119 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4120 4121 /* Get data bit while falling edge */ 4122 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4123 result <<= 1; 4124 if (read_byte & NVR_BITIN) 4125 result |= 1; 4126 4127 trms1040_wait_30us(io_port); 4128 } 4129 4130 /* Disable chip select */ 4131 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4132 return result; 4133 } 4134 4135 4136 /** 4137 * trms1040_read_all - read all bytes from the eeprom 4138 * 4139 * Read the 128 bytes from the SEEPROM. 4140 * 4141 * @eeprom: where to store the data 4142 * @io_port: the base io port 4143 **/ 4144 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4145 { 4146 u8 *b_eeprom = (u8 *)eeprom; 4147 u8 addr; 4148 4149 /* Enable SEEPROM */ 4150 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4151 io_port + TRM_S1040_GEN_CONTROL); 4152 4153 /* read details */ 4154 for (addr = 0; addr < 128; addr++, b_eeprom++) 4155 *b_eeprom = trms1040_get_data(io_port, addr); 4156 4157 /* Disable SEEPROM */ 4158 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4159 io_port + TRM_S1040_GEN_CONTROL); 4160 } 4161 4162 4163 4164 /** 4165 * check_eeprom - get and check contents of the eeprom 4166 * 4167 * Read seeprom 128 bytes into the memory provider in eeprom. 4168 * Checks the checksum and if it's not correct it uses a set of default 4169 * values. 4170 * 4171 * @eeprom: caller allocated strcuture to read the eeprom data into 4172 * @io_port: io port to read from 4173 **/ 4174 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4175 { 4176 u16 *w_eeprom = (u16 *)eeprom; 4177 u16 w_addr; 4178 u16 cksum; 4179 u32 d_addr; 4180 u32 *d_eeprom; 4181 4182 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4183 4184 cksum = 0; 4185 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4186 w_addr++, w_eeprom++) 4187 cksum += *w_eeprom; 4188 if (cksum != 0x1234) { 4189 /* 4190 * Checksum is wrong. 4191 * Load a set of defaults into the eeprom buffer 4192 */ 4193 dprintkl(KERN_WARNING, 4194 "EEProm checksum error: using default values and options.\n"); 4195 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4196 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4197 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4198 eeprom->sub_sys_id[1] = 4199 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4200 eeprom->sub_class = 0x00; 4201 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4202 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4203 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4204 eeprom->device_id[1] = 4205 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4206 eeprom->reserved = 0x00; 4207 4208 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4209 d_addr < 16; d_addr++, d_eeprom++) 4210 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4211 4212 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4213 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4214 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4215 *d_eeprom = 0x00; 4216 4217 /* Now load defaults (maybe set by boot/module params) */ 4218 set_safe_settings(); 4219 fix_settings(); 4220 eeprom_override(eeprom); 4221 4222 eeprom->cksum = 0x00; 4223 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4224 w_addr < 63; w_addr++, w_eeprom++) 4225 cksum += *w_eeprom; 4226 4227 *w_eeprom = 0x1234 - cksum; 4228 trms1040_write_all(eeprom, io_port); 4229 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4230 } else { 4231 set_safe_settings(); 4232 eeprom_index_to_delay(eeprom); 4233 eeprom_override(eeprom); 4234 } 4235 } 4236 4237 4238 /** 4239 * print_eeprom_settings - output the eeprom settings 4240 * to the kernel log so people can see what they were. 4241 * 4242 * @eeprom: The eeprom data strucutre to show details for. 4243 **/ 4244 static void __devinit print_eeprom_settings(struct NvRamType *eeprom) 4245 { 4246 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4247 eeprom->scsi_id, 4248 eeprom->target[0].period, 4249 clock_speed[eeprom->target[0].period] / 10, 4250 clock_speed[eeprom->target[0].period] % 10, 4251 eeprom->target[0].cfg0); 4252 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4253 eeprom->channel_cfg, eeprom->max_tag, 4254 1 << eeprom->max_tag, eeprom->delay_time); 4255 } 4256 4257 4258 /* Free SG tables */ 4259 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4260 { 4261 int i; 4262 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4263 4264 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4265 kfree(acb->srb_array[i].segment_x); 4266 4267 vfree(acb->srb_array[0].virt_map); 4268 } 4269 4270 4271 /* 4272 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4273 * should never cross a page boundary */ 4274 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4275 { 4276 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4277 *SEGMENTX_LEN; 4278 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4279 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4280 int srb_idx = 0; 4281 unsigned i = 0; 4282 struct SGentry *ptr; 4283 void **virt_array; 4284 4285 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) { 4286 acb->srb_array[i].segment_x = NULL; 4287 acb->srb_array[i].virt_map = NULL; 4288 } 4289 4290 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4291 while (pages--) { 4292 ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL); 4293 if (!ptr) { 4294 adapter_sg_tables_free(acb); 4295 return 1; 4296 } 4297 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4298 PAGE_SIZE, ptr, srb_idx); 4299 i = 0; 4300 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4301 acb->srb_array[srb_idx++].segment_x = 4302 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4303 } 4304 if (i < srbs_per_page) 4305 acb->srb.segment_x = 4306 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4307 else 4308 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4309 4310 virt_array = vmalloc((DC395x_MAX_SRB_CNT + 1) * DC395x_MAX_SG_LISTENTRY * sizeof(void*)); 4311 4312 if (!virt_array) { 4313 adapter_sg_tables_free(acb); 4314 return 1; 4315 } 4316 4317 for (i = 0; i < DC395x_MAX_SRB_CNT + 1; i++) { 4318 acb->srb_array[i].virt_map = virt_array; 4319 virt_array += DC395x_MAX_SG_LISTENTRY; 4320 } 4321 4322 return 0; 4323 } 4324 4325 4326 4327 /** 4328 * adapter_print_config - print adapter connection and termination 4329 * config 4330 * 4331 * The io port in the adapter needs to have been set before calling 4332 * this function. 4333 * 4334 * @acb: The adapter to print the information for. 4335 **/ 4336 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) 4337 { 4338 u8 bval; 4339 4340 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4341 dprintkl(KERN_INFO, "%sConnectors: ", 4342 ((bval & WIDESCSI) ? "(Wide) " : "")); 4343 if (!(bval & CON5068)) 4344 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4345 if (!(bval & CON68)) 4346 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4347 if (!(bval & CON50)) 4348 printk("int50 "); 4349 if ((bval & (CON5068 | CON50 | CON68)) == 4350 0 /*(CON5068 | CON50 | CON68) */ ) 4351 printk(" Oops! (All 3?) "); 4352 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4353 printk(" Termination: "); 4354 if (bval & DIS_TERM) 4355 printk("Disabled\n"); 4356 else { 4357 if (bval & AUTOTERM) 4358 printk("Auto "); 4359 if (bval & LOW8TERM) 4360 printk("Low "); 4361 if (bval & UP8TERM) 4362 printk("High "); 4363 printk("\n"); 4364 } 4365 } 4366 4367 4368 /** 4369 * adapter_init_params - Initialize the various parameters in the 4370 * adapter structure. Note that the pointer to the scsi_host is set 4371 * early (when this instance is created) and the io_port and irq 4372 * values are set later after they have been reserved. This just gets 4373 * everything set to a good starting position. 4374 * 4375 * The eeprom structure in the adapter needs to have been set before 4376 * calling this function. 4377 * 4378 * @acb: The adapter to initialize. 4379 **/ 4380 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) 4381 { 4382 struct NvRamType *eeprom = &acb->eeprom; 4383 int i; 4384 4385 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4386 /* NOTE: acb->io_port_base is set at port registration time */ 4387 /* NOTE: acb->io_port_len is set at port registration time */ 4388 4389 INIT_LIST_HEAD(&acb->dcb_list); 4390 acb->dcb_run_robin = NULL; 4391 acb->active_dcb = NULL; 4392 4393 INIT_LIST_HEAD(&acb->srb_free_list); 4394 /* temp SRB for Q tag used or abort command used */ 4395 acb->tmp_srb = &acb->srb; 4396 init_timer(&acb->waiting_timer); 4397 init_timer(&acb->selto_timer); 4398 4399 acb->srb_count = DC395x_MAX_SRB_CNT; 4400 4401 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4402 /* NOTE: acb->irq_level is set at IRQ registration time */ 4403 4404 acb->tag_max_num = 1 << eeprom->max_tag; 4405 if (acb->tag_max_num > 30) 4406 acb->tag_max_num = 30; 4407 4408 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4409 acb->gmode2 = eeprom->channel_cfg; 4410 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4411 4412 if (eeprom->channel_cfg & NAC_SCANLUN) 4413 acb->lun_chk = 1; 4414 acb->scan_devices = 1; 4415 4416 acb->scsi_host->this_id = eeprom->scsi_id; 4417 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4418 4419 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4420 acb->dcb_map[i] = 0; 4421 4422 acb->msg_len = 0; 4423 4424 /* link static array of srbs into the srb free list */ 4425 for (i = 0; i < acb->srb_count - 1; i++) 4426 srb_free_insert(acb, &acb->srb_array[i]); 4427 } 4428 4429 4430 /** 4431 * adapter_init_host - Initialize the scsi host instance based on 4432 * values that we have already stored in the adapter instance. There's 4433 * some mention that a lot of these are deprecated, so we won't use 4434 * them (we'll use the ones in the adapter instance) but we'll fill 4435 * them in in case something else needs them. 4436 * 4437 * The eeprom structure, irq and io ports in the adapter need to have 4438 * been set before calling this function. 4439 * 4440 * @host: The scsi host instance to fill in the values for. 4441 **/ 4442 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) 4443 { 4444 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4445 struct NvRamType *eeprom = &acb->eeprom; 4446 4447 host->max_cmd_len = 24; 4448 host->can_queue = DC395x_MAX_CMD_QUEUE; 4449 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4450 host->this_id = (int)eeprom->scsi_id; 4451 host->io_port = acb->io_port_base; 4452 host->n_io_port = acb->io_port_len; 4453 host->dma_channel = -1; 4454 host->unique_id = acb->io_port_base; 4455 host->irq = acb->irq_level; 4456 host->last_reset = jiffies; 4457 4458 host->max_id = 16; 4459 if (host->max_id - 1 == eeprom->scsi_id) 4460 host->max_id--; 4461 4462 #ifdef CONFIG_SCSI_MULTI_LUN 4463 if (eeprom->channel_cfg & NAC_SCANLUN) 4464 host->max_lun = 8; 4465 else 4466 host->max_lun = 1; 4467 #else 4468 host->max_lun = 1; 4469 #endif 4470 4471 } 4472 4473 4474 /** 4475 * adapter_init_chip - Get the chip into a know state and figure out 4476 * some of the settings that apply to this adapter. 4477 * 4478 * The io port in the adapter needs to have been set before calling 4479 * this function. The config will be configured correctly on return. 4480 * 4481 * @acb: The adapter which we are to init. 4482 **/ 4483 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) 4484 { 4485 struct NvRamType *eeprom = &acb->eeprom; 4486 4487 /* Mask all the interrupt */ 4488 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4489 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4490 4491 /* Reset SCSI module */ 4492 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4493 4494 /* Reset PCI/DMA module */ 4495 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4496 udelay(20); 4497 4498 /* program configuration 0 */ 4499 acb->config = HCC_AUTOTERM | HCC_PARITY; 4500 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4501 acb->config |= HCC_WIDE_CARD; 4502 4503 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4504 acb->config |= HCC_SCSI_RESET; 4505 4506 if (acb->config & HCC_SCSI_RESET) { 4507 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4508 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4509 4510 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4511 /*spin_unlock_irq (&io_request_lock); */ 4512 udelay(500); 4513 4514 acb->scsi_host->last_reset = 4515 jiffies + HZ / 2 + 4516 HZ * acb->eeprom.delay_time; 4517 4518 /*spin_lock_irq (&io_request_lock); */ 4519 } 4520 } 4521 4522 4523 /** 4524 * init_adapter - Grab the resource for the card, setup the adapter 4525 * information, set the card into a known state, create the various 4526 * tables etc etc. This basically gets all adapter information all up 4527 * to date, intialised and gets the chip in sync with it. 4528 * 4529 * @host: This hosts adapter structure 4530 * @io_port: The base I/O port 4531 * @irq: IRQ 4532 * 4533 * Returns 0 if the initialization succeeds, any other value on 4534 * failure. 4535 **/ 4536 static int __devinit adapter_init(struct AdapterCtlBlk *acb, 4537 unsigned long io_port, u32 io_port_len, unsigned int irq) 4538 { 4539 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4540 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4541 goto failed; 4542 } 4543 /* store port base to indicate we have registered it */ 4544 acb->io_port_base = io_port; 4545 acb->io_port_len = io_port_len; 4546 4547 if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) { 4548 /* release the region we just claimed */ 4549 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4550 goto failed; 4551 } 4552 /* store irq to indicate we have registered it */ 4553 acb->irq_level = irq; 4554 4555 /* get eeprom configuration information and command line settings etc */ 4556 check_eeprom(&acb->eeprom, io_port); 4557 print_eeprom_settings(&acb->eeprom); 4558 4559 /* setup adapter control block */ 4560 adapter_init_params(acb); 4561 4562 /* display card connectors/termination settings */ 4563 adapter_print_config(acb); 4564 4565 if (adapter_sg_tables_alloc(acb)) { 4566 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4567 goto failed; 4568 } 4569 adapter_init_scsi_host(acb->scsi_host); 4570 adapter_init_chip(acb); 4571 set_basic_config(acb); 4572 4573 dprintkdbg(DBG_0, 4574 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4575 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4576 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4577 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4578 return 0; 4579 4580 failed: 4581 if (acb->irq_level) 4582 free_irq(acb->irq_level, acb); 4583 if (acb->io_port_base) 4584 release_region(acb->io_port_base, acb->io_port_len); 4585 adapter_sg_tables_free(acb); 4586 4587 return 1; 4588 } 4589 4590 4591 /** 4592 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4593 * stopping all operations and disabling interrupt generation on the 4594 * card. 4595 * 4596 * @acb: The adapter which we are to shutdown. 4597 **/ 4598 static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4599 { 4600 /* disable interrupts */ 4601 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4602 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4603 4604 /* reset the scsi bus */ 4605 if (acb->config & HCC_SCSI_RESET) 4606 reset_scsi_bus(acb); 4607 4608 /* clear any pending interupt state */ 4609 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4610 } 4611 4612 4613 4614 /** 4615 * adapter_uninit - Shut down the chip and release any resources that 4616 * we had allocated. Once this returns the adapter should not be used 4617 * anymore. 4618 * 4619 * @acb: The adapter which we are to un-initialize. 4620 **/ 4621 static void adapter_uninit(struct AdapterCtlBlk *acb) 4622 { 4623 unsigned long flags; 4624 DC395x_LOCK_IO(acb->scsi_host, flags); 4625 4626 /* remove timers */ 4627 if (timer_pending(&acb->waiting_timer)) 4628 del_timer(&acb->waiting_timer); 4629 if (timer_pending(&acb->selto_timer)) 4630 del_timer(&acb->selto_timer); 4631 4632 adapter_uninit_chip(acb); 4633 adapter_remove_and_free_all_devices(acb); 4634 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4635 4636 if (acb->irq_level) 4637 free_irq(acb->irq_level, acb); 4638 if (acb->io_port_base) 4639 release_region(acb->io_port_base, acb->io_port_len); 4640 4641 adapter_sg_tables_free(acb); 4642 } 4643 4644 4645 #undef SPRINTF 4646 #define SPRINTF(args...) pos += sprintf(pos, args) 4647 4648 #undef YESNO 4649 #define YESNO(YN) \ 4650 if (YN) SPRINTF(" Yes ");\ 4651 else SPRINTF(" No ") 4652 4653 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, 4654 char **start, off_t offset, int length, int inout) 4655 { 4656 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4657 int spd, spd1; 4658 char *pos = buffer; 4659 struct DeviceCtlBlk *dcb; 4660 unsigned long flags; 4661 int dev; 4662 4663 if (inout) /* Has data been written to the file ? */ 4664 return -EPERM; 4665 4666 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4667 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4668 4669 DC395x_LOCK_IO(acb->scsi_host, flags); 4670 4671 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4672 SPRINTF("DC395U/UW/F DC315/U %s\n", 4673 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4674 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4675 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4676 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4677 4678 SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); 4679 SPRINTF("AdapterID %i\n", host->this_id); 4680 4681 SPRINTF("tag_max_num %i", acb->tag_max_num); 4682 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4683 SPRINTF(", FilterCfg 0x%02x", 4684 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4685 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4686 /*SPRINTF("\n"); */ 4687 4688 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4689 SPRINTF 4690 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4691 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4692 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4693 acb->dcb_map[6], acb->dcb_map[7]); 4694 SPRINTF 4695 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4696 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4697 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4698 acb->dcb_map[14], acb->dcb_map[15]); 4699 4700 SPRINTF 4701 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4702 4703 dev = 0; 4704 list_for_each_entry(dcb, &acb->dcb_list, list) { 4705 int nego_period; 4706 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4707 dcb->target_lun); 4708 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4709 YESNO(dcb->sync_offset); 4710 YESNO(dcb->sync_period & WIDE_SYNC); 4711 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4712 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4713 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4714 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4715 if (dcb->sync_offset) 4716 SPRINTF(" %03i ns ", nego_period); 4717 else 4718 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4719 4720 if (dcb->sync_offset & 0x0f) { 4721 spd = 1000 / (nego_period); 4722 spd1 = 1000 % (nego_period); 4723 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4724 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4725 (dcb->sync_offset & 0x0f)); 4726 } else 4727 SPRINTF(" "); 4728 4729 /* Add more info ... */ 4730 SPRINTF(" %02i\n", dcb->max_command); 4731 dev++; 4732 } 4733 4734 if (timer_pending(&acb->waiting_timer)) 4735 SPRINTF("Waiting queue timer running\n"); 4736 else 4737 SPRINTF("\n"); 4738 4739 list_for_each_entry(dcb, &acb->dcb_list, list) { 4740 struct ScsiReqBlk *srb; 4741 if (!list_empty(&dcb->srb_waiting_list)) 4742 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4743 dcb->target_id, dcb->target_lun, 4744 list_size(&dcb->srb_waiting_list)); 4745 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4746 SPRINTF(" %li", srb->cmd->pid); 4747 if (!list_empty(&dcb->srb_going_list)) 4748 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4749 dcb->target_id, dcb->target_lun, 4750 list_size(&dcb->srb_going_list)); 4751 list_for_each_entry(srb, &dcb->srb_going_list, list) 4752 SPRINTF(" %li", srb->cmd->pid); 4753 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4754 SPRINTF("\n"); 4755 } 4756 4757 if (debug_enabled(DBG_1)) { 4758 SPRINTF("DCB list for ACB %p:\n", acb); 4759 list_for_each_entry(dcb, &acb->dcb_list, list) { 4760 SPRINTF("%p -> ", dcb); 4761 } 4762 SPRINTF("END\n"); 4763 } 4764 4765 *start = buffer + offset; 4766 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4767 4768 if (pos - buffer < offset) 4769 return 0; 4770 else if (pos - buffer - offset < length) 4771 return pos - buffer - offset; 4772 else 4773 return length; 4774 } 4775 4776 4777 static struct scsi_host_template dc395x_driver_template = { 4778 .module = THIS_MODULE, 4779 .proc_name = DC395X_NAME, 4780 .proc_info = dc395x_proc_info, 4781 .name = DC395X_BANNER " " DC395X_VERSION, 4782 .queuecommand = dc395x_queue_command, 4783 .bios_param = dc395x_bios_param, 4784 .slave_alloc = dc395x_slave_alloc, 4785 .slave_destroy = dc395x_slave_destroy, 4786 .can_queue = DC395x_MAX_CAN_QUEUE, 4787 .this_id = 7, 4788 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4789 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4790 .eh_abort_handler = dc395x_eh_abort, 4791 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4792 .unchecked_isa_dma = 0, 4793 .use_clustering = DISABLE_CLUSTERING, 4794 }; 4795 4796 4797 /** 4798 * banner_display - Display banner on first instance of driver 4799 * initialized. 4800 **/ 4801 static void banner_display(void) 4802 { 4803 static int banner_done = 0; 4804 if (!banner_done) 4805 { 4806 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4807 banner_done = 1; 4808 } 4809 } 4810 4811 4812 /** 4813 * dc395x_init_one - Initialise a single instance of the adapter. 4814 * 4815 * The PCI layer will call this once for each instance of the adapter 4816 * that it finds in the system. The pci_dev strcuture indicates which 4817 * instance we are being called from. 4818 * 4819 * @dev: The PCI device to intialize. 4820 * @id: Looks like a pointer to the entry in our pci device table 4821 * that was actually matched by the PCI subsystem. 4822 * 4823 * Returns 0 on success, or an error code (-ve) on failure. 4824 **/ 4825 static int __devinit dc395x_init_one(struct pci_dev *dev, 4826 const struct pci_device_id *id) 4827 { 4828 struct Scsi_Host *scsi_host = NULL; 4829 struct AdapterCtlBlk *acb = NULL; 4830 unsigned long io_port_base; 4831 unsigned int io_port_len; 4832 unsigned int irq; 4833 4834 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4835 banner_display(); 4836 4837 if (pci_enable_device(dev)) 4838 { 4839 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4840 return -ENODEV; 4841 } 4842 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4843 io_port_len = pci_resource_len(dev, 0); 4844 irq = dev->irq; 4845 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4846 4847 /* allocate scsi host information (includes out adapter) */ 4848 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4849 sizeof(struct AdapterCtlBlk)); 4850 if (!scsi_host) { 4851 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4852 goto fail; 4853 } 4854 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4855 acb->scsi_host = scsi_host; 4856 acb->dev = dev; 4857 4858 /* initialise the adapter and everything we need */ 4859 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4860 dprintkl(KERN_INFO, "adapter init failed\n"); 4861 goto fail; 4862 } 4863 4864 pci_set_master(dev); 4865 4866 /* get the scsi mid level to scan for new devices on the bus */ 4867 if (scsi_add_host(scsi_host, &dev->dev)) { 4868 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4869 goto fail; 4870 } 4871 pci_set_drvdata(dev, scsi_host); 4872 scsi_scan_host(scsi_host); 4873 4874 return 0; 4875 4876 fail: 4877 if (acb != NULL) 4878 adapter_uninit(acb); 4879 if (scsi_host != NULL) 4880 scsi_host_put(scsi_host); 4881 pci_disable_device(dev); 4882 return -ENODEV; 4883 } 4884 4885 4886 /** 4887 * dc395x_remove_one - Called to remove a single instance of the 4888 * adapter. 4889 * 4890 * @dev: The PCI device to intialize. 4891 **/ 4892 static void __devexit dc395x_remove_one(struct pci_dev *dev) 4893 { 4894 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4895 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4896 4897 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4898 4899 scsi_remove_host(scsi_host); 4900 adapter_uninit(acb); 4901 pci_disable_device(dev); 4902 scsi_host_put(scsi_host); 4903 pci_set_drvdata(dev, NULL); 4904 } 4905 4906 4907 static struct pci_device_id dc395x_pci_table[] = { 4908 { 4909 .vendor = PCI_VENDOR_ID_TEKRAM, 4910 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4911 .subvendor = PCI_ANY_ID, 4912 .subdevice = PCI_ANY_ID, 4913 }, 4914 {} /* Terminating entry */ 4915 }; 4916 MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4917 4918 4919 static struct pci_driver dc395x_driver = { 4920 .name = DC395X_NAME, 4921 .id_table = dc395x_pci_table, 4922 .probe = dc395x_init_one, 4923 .remove = __devexit_p(dc395x_remove_one), 4924 }; 4925 4926 4927 /** 4928 * dc395x_module_init - Module initialization function 4929 * 4930 * Used by both module and built-in driver to initialise this driver. 4931 **/ 4932 static int __init dc395x_module_init(void) 4933 { 4934 return pci_module_init(&dc395x_driver); 4935 } 4936 4937 4938 /** 4939 * dc395x_module_exit - Module cleanup function. 4940 **/ 4941 static void __exit dc395x_module_exit(void) 4942 { 4943 pci_unregister_driver(&dc395x_driver); 4944 } 4945 4946 4947 module_init(dc395x_module_init); 4948 module_exit(dc395x_module_exit); 4949 4950 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4951 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4952 MODULE_LICENSE("GPL"); 4953