1 /* 2 * dc395x.c 3 * 4 * Device Driver for Tekram DC395(U/UW/F), DC315(U) 5 * PCI SCSI Bus Master Host Adapter 6 * (SCSI chip set used Tekram ASIC TRM-S1040) 7 * 8 * Authors: 9 * C.L. Huang <ching@tekram.com.tw> 10 * Erich Chen <erich@tekram.com.tw> 11 * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. 12 * 13 * Kurt Garloff <garloff@suse.de> 14 * (C) 1999-2000 Kurt Garloff 15 * 16 * Oliver Neukum <oliver@neukum.name> 17 * Ali Akcaagac <aliakc@web.de> 18 * Jamie Lenehan <lenehan@twibble.org> 19 * (C) 2003 20 * 21 * License: GNU GPL 22 * 23 ************************************************************************* 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the above copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. The name of the author may not be used to endorse or promote products 34 * derived from this software without specific prior written permission. 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 37 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 39 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 45 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 46 * 47 ************************************************************************ 48 */ 49 #include <linux/module.h> 50 #include <linux/moduleparam.h> 51 #include <linux/delay.h> 52 #include <linux/ctype.h> 53 #include <linux/blkdev.h> 54 #include <linux/interrupt.h> 55 #include <linux/init.h> 56 #include <linux/spinlock.h> 57 #include <linux/pci.h> 58 #include <linux/list.h> 59 #include <linux/vmalloc.h> 60 #include <linux/slab.h> 61 #include <asm/io.h> 62 63 #include <scsi/scsi.h> 64 #include <scsi/scsicam.h> /* needed for scsicam_bios_param */ 65 #include <scsi/scsi_cmnd.h> 66 #include <scsi/scsi_device.h> 67 #include <scsi/scsi_host.h> 68 69 #include "dc395x.h" 70 71 #define DC395X_NAME "dc395x" 72 #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" 73 #define DC395X_VERSION "v2.05, 2004/03/08" 74 75 /*--------------------------------------------------------------------------- 76 Features 77 ---------------------------------------------------------------------------*/ 78 /* 79 * Set to disable parts of the driver 80 */ 81 /*#define DC395x_NO_DISCONNECT*/ 82 /*#define DC395x_NO_TAGQ*/ 83 /*#define DC395x_NO_SYNC*/ 84 /*#define DC395x_NO_WIDE*/ 85 86 /*--------------------------------------------------------------------------- 87 Debugging 88 ---------------------------------------------------------------------------*/ 89 /* 90 * Types of debugging that can be enabled and disabled 91 */ 92 #define DBG_KG 0x0001 93 #define DBG_0 0x0002 94 #define DBG_1 0x0004 95 #define DBG_SG 0x0020 96 #define DBG_FIFO 0x0040 97 #define DBG_PIO 0x0080 98 99 100 /* 101 * Set set of things to output debugging for. 102 * Undefine to remove all debugging 103 */ 104 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ 105 /*#define DEBUG_MASK DBG_0*/ 106 107 108 /* 109 * Output a kernel mesage at the specified level and append the 110 * driver name and a ": " to the start of the message 111 */ 112 #define dprintkl(level, format, arg...) \ 113 printk(level DC395X_NAME ": " format , ## arg) 114 115 116 #ifdef DEBUG_MASK 117 /* 118 * print a debug message - this is formated with KERN_DEBUG, then the 119 * driver name followed by a ": " and then the message is output. 120 * This also checks that the specified debug level is enabled before 121 * outputing the message 122 */ 123 #define dprintkdbg(type, format, arg...) \ 124 do { \ 125 if ((type) & (DEBUG_MASK)) \ 126 dprintkl(KERN_DEBUG , format , ## arg); \ 127 } while (0) 128 129 /* 130 * Check if the specified type of debugging is enabled 131 */ 132 #define debug_enabled(type) ((DEBUG_MASK) & (type)) 133 134 #else 135 /* 136 * No debugging. Do nothing 137 */ 138 #define dprintkdbg(type, format, arg...) \ 139 do {} while (0) 140 #define debug_enabled(type) (0) 141 142 #endif 143 144 145 #ifndef PCI_VENDOR_ID_TEKRAM 146 #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ 147 #endif 148 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 149 #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ 150 #endif 151 152 153 #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) 154 #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) 155 156 #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) 157 #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) 158 #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) 159 #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) 160 #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) 161 #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) 162 163 /* cmd->result */ 164 #define RES_TARGET 0x000000FF /* Target State */ 165 #define RES_TARGET_LNX STATUS_MASK /* Only official ... */ 166 #define RES_ENDMSG 0x0000FF00 /* End Message */ 167 #define RES_DID 0x00FF0000 /* DID_ codes */ 168 #define RES_DRV 0xFF000000 /* DRIVER_ codes */ 169 170 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) 171 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) 172 173 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } 174 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } 175 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } 176 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } 177 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } 178 179 #define TAG_NONE 255 180 181 /* 182 * srb->segement_x is the hw sg list. It is always allocated as a 183 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not 184 * cross a page boundy. 185 */ 186 #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) 187 188 189 struct SGentry { 190 u32 address; /* bus! address */ 191 u32 length; 192 }; 193 194 /* The SEEPROM structure for TRM_S1040 */ 195 struct NVRamTarget { 196 u8 cfg0; /* Target configuration byte 0 */ 197 u8 period; /* Target period */ 198 u8 cfg2; /* Target configuration byte 2 */ 199 u8 cfg3; /* Target configuration byte 3 */ 200 }; 201 202 struct NvRamType { 203 u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ 204 u8 sub_sys_id[2]; /* 2,3 Sub System ID */ 205 u8 sub_class; /* 4 Sub Class */ 206 u8 vendor_id[2]; /* 5,6 Vendor ID */ 207 u8 device_id[2]; /* 7,8 Device ID */ 208 u8 reserved; /* 9 Reserved */ 209 struct NVRamTarget target[DC395x_MAX_SCSI_ID]; 210 /** 10,11,12,13 211 ** 14,15,16,17 212 ** .... 213 ** .... 214 ** 70,71,72,73 215 */ 216 u8 scsi_id; /* 74 Host Adapter SCSI ID */ 217 u8 channel_cfg; /* 75 Channel configuration */ 218 u8 delay_time; /* 76 Power on delay time */ 219 u8 max_tag; /* 77 Maximum tags */ 220 u8 reserved0; /* 78 */ 221 u8 boot_target; /* 79 */ 222 u8 boot_lun; /* 80 */ 223 u8 reserved1; /* 81 */ 224 u16 reserved2[22]; /* 82,..125 */ 225 u16 cksum; /* 126,127 */ 226 }; 227 228 struct ScsiReqBlk { 229 struct list_head list; /* next/prev ptrs for srb lists */ 230 struct DeviceCtlBlk *dcb; 231 struct scsi_cmnd *cmd; 232 233 struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ 234 dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ 235 236 u8 sg_count; /* No of HW sg entries for this request */ 237 u8 sg_index; /* Index of HW sg entry for this request */ 238 size_t total_xfer_length; /* Total number of bytes remaining to be transferred */ 239 size_t request_length; /* Total number of bytes in this request */ 240 /* 241 * The sense buffer handling function, request_sense, uses 242 * the first hw sg entry (segment_x[0]) and the transfer 243 * length (total_xfer_length). While doing this it stores the 244 * original values into the last sg hw list 245 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the 246 * total_xfer_length in xferred. These values are restored in 247 * pci_unmap_srb_sense. This is the only place xferred is used. 248 */ 249 size_t xferred; /* Saved copy of total_xfer_length */ 250 251 u16 state; 252 253 u8 msgin_buf[6]; 254 u8 msgout_buf[6]; 255 256 u8 adapter_status; 257 u8 target_status; 258 u8 msg_count; 259 u8 end_message; 260 261 u8 tag_number; 262 u8 status; 263 u8 retry_count; 264 u8 flag; 265 266 u8 scsi_phase; 267 }; 268 269 struct DeviceCtlBlk { 270 struct list_head list; /* next/prev ptrs for the dcb list */ 271 struct AdapterCtlBlk *acb; 272 struct list_head srb_going_list; /* head of going srb list */ 273 struct list_head srb_waiting_list; /* head of waiting srb list */ 274 275 struct ScsiReqBlk *active_srb; 276 u32 tag_mask; 277 278 u16 max_command; 279 280 u8 target_id; /* SCSI Target ID (SCSI Only) */ 281 u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ 282 u8 identify_msg; 283 u8 dev_mode; 284 285 u8 inquiry7; /* To store Inquiry flags */ 286 u8 sync_mode; /* 0:async mode */ 287 u8 min_nego_period; /* for nego. */ 288 u8 sync_period; /* for reg. */ 289 290 u8 sync_offset; /* for reg. and nego.(low nibble) */ 291 u8 flag; 292 u8 dev_type; 293 u8 init_tcq_flag; 294 }; 295 296 struct AdapterCtlBlk { 297 struct Scsi_Host *scsi_host; 298 299 unsigned long io_port_base; 300 unsigned long io_port_len; 301 302 struct list_head dcb_list; /* head of going dcb list */ 303 struct DeviceCtlBlk *dcb_run_robin; 304 struct DeviceCtlBlk *active_dcb; 305 306 struct list_head srb_free_list; /* head of free srb list */ 307 struct ScsiReqBlk *tmp_srb; 308 struct timer_list waiting_timer; 309 struct timer_list selto_timer; 310 311 unsigned long last_reset; 312 313 u16 srb_count; 314 315 u8 sel_timeout; 316 317 unsigned int irq_level; 318 u8 tag_max_num; 319 u8 acb_flag; 320 u8 gmode2; 321 322 u8 config; 323 u8 lun_chk; 324 u8 scan_devices; 325 u8 hostid_bit; 326 327 u8 dcb_map[DC395x_MAX_SCSI_ID]; 328 struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; 329 330 struct pci_dev *dev; 331 332 u8 msg_len; 333 334 struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; 335 struct ScsiReqBlk srb; 336 337 struct NvRamType eeprom; /* eeprom settings for this adapter */ 338 }; 339 340 341 /*--------------------------------------------------------------------------- 342 Forward declarations 343 ---------------------------------------------------------------------------*/ 344 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 345 u16 *pscsi_status); 346 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 347 u16 *pscsi_status); 348 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 349 u16 *pscsi_status); 350 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 351 u16 *pscsi_status); 352 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 353 u16 *pscsi_status); 354 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 355 u16 *pscsi_status); 356 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 357 u16 *pscsi_status); 358 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 359 u16 *pscsi_status); 360 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 361 u16 *pscsi_status); 362 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 363 u16 *pscsi_status); 364 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 365 u16 *pscsi_status); 366 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 367 u16 *pscsi_status); 368 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 369 u16 *pscsi_status); 370 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 371 u16 *pscsi_status); 372 static void set_basic_config(struct AdapterCtlBlk *acb); 373 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 374 struct ScsiReqBlk *srb); 375 static void reset_scsi_bus(struct AdapterCtlBlk *acb); 376 static void data_io_transfer(struct AdapterCtlBlk *acb, 377 struct ScsiReqBlk *srb, u16 io_dir); 378 static void disconnect(struct AdapterCtlBlk *acb); 379 static void reselect(struct AdapterCtlBlk *acb); 380 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 381 struct ScsiReqBlk *srb); 382 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 383 struct ScsiReqBlk *srb); 384 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 385 struct ScsiReqBlk *srb); 386 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, 387 struct scsi_cmnd *cmd, u8 force); 388 static void scsi_reset_detect(struct AdapterCtlBlk *acb); 389 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); 390 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 391 struct ScsiReqBlk *srb); 392 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 393 struct ScsiReqBlk *srb); 394 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 395 struct ScsiReqBlk *srb); 396 static void set_xfer_rate(struct AdapterCtlBlk *acb, 397 struct DeviceCtlBlk *dcb); 398 static void waiting_timeout(unsigned long ptr); 399 400 401 /*--------------------------------------------------------------------------- 402 Static Data 403 ---------------------------------------------------------------------------*/ 404 static u16 current_sync_offset = 0; 405 406 static void *dc395x_scsi_phase0[] = { 407 data_out_phase0,/* phase:0 */ 408 data_in_phase0, /* phase:1 */ 409 command_phase0, /* phase:2 */ 410 status_phase0, /* phase:3 */ 411 nop0, /* phase:4 PH_BUS_FREE .. initial phase */ 412 nop0, /* phase:5 PH_BUS_FREE .. initial phase */ 413 msgout_phase0, /* phase:6 */ 414 msgin_phase0, /* phase:7 */ 415 }; 416 417 static void *dc395x_scsi_phase1[] = { 418 data_out_phase1,/* phase:0 */ 419 data_in_phase1, /* phase:1 */ 420 command_phase1, /* phase:2 */ 421 status_phase1, /* phase:3 */ 422 nop1, /* phase:4 PH_BUS_FREE .. initial phase */ 423 nop1, /* phase:5 PH_BUS_FREE .. initial phase */ 424 msgout_phase1, /* phase:6 */ 425 msgin_phase1, /* phase:7 */ 426 }; 427 428 /* 429 *Fast20: 000 50ns, 20.0 MHz 430 * 001 75ns, 13.3 MHz 431 * 010 100ns, 10.0 MHz 432 * 011 125ns, 8.0 MHz 433 * 100 150ns, 6.6 MHz 434 * 101 175ns, 5.7 MHz 435 * 110 200ns, 5.0 MHz 436 * 111 250ns, 4.0 MHz 437 * 438 *Fast40(LVDS): 000 25ns, 40.0 MHz 439 * 001 50ns, 20.0 MHz 440 * 010 75ns, 13.3 MHz 441 * 011 100ns, 10.0 MHz 442 * 100 125ns, 8.0 MHz 443 * 101 150ns, 6.6 MHz 444 * 110 175ns, 5.7 MHz 445 * 111 200ns, 5.0 MHz 446 */ 447 /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ 448 449 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ 450 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; 451 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; 452 453 454 /*--------------------------------------------------------------------------- 455 Configuration 456 ---------------------------------------------------------------------------*/ 457 /* 458 * Module/boot parameters currently effect *all* instances of the 459 * card in the system. 460 */ 461 462 /* 463 * Command line parameters are stored in a structure below. 464 * These are the index's into the structure for the various 465 * command line options. 466 */ 467 #define CFG_ADAPTER_ID 0 468 #define CFG_MAX_SPEED 1 469 #define CFG_DEV_MODE 2 470 #define CFG_ADAPTER_MODE 3 471 #define CFG_TAGS 4 472 #define CFG_RESET_DELAY 5 473 474 #define CFG_NUM 6 /* number of configuration items */ 475 476 477 /* 478 * Value used to indicate that a command line override 479 * hasn't been used to modify the value. 480 */ 481 #define CFG_PARAM_UNSET -1 482 483 484 /* 485 * Hold command line parameters. 486 */ 487 struct ParameterData { 488 int value; /* value of this setting */ 489 int min; /* minimum value */ 490 int max; /* maximum value */ 491 int def; /* default value */ 492 int safe; /* safe value */ 493 }; 494 static struct ParameterData cfg_data[] = { 495 { /* adapter id */ 496 CFG_PARAM_UNSET, 497 0, 498 15, 499 7, 500 7 501 }, 502 { /* max speed */ 503 CFG_PARAM_UNSET, 504 0, 505 7, 506 1, /* 13.3Mhz */ 507 4, /* 6.7Hmz */ 508 }, 509 { /* dev mode */ 510 CFG_PARAM_UNSET, 511 0, 512 0x3f, 513 NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | 514 NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | 515 NTC_DO_SEND_START, 516 NTC_DO_PARITY_CHK | NTC_DO_SEND_START 517 }, 518 { /* adapter mode */ 519 CFG_PARAM_UNSET, 520 0, 521 0x2f, 522 NAC_SCANLUN | 523 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET 524 /*| NAC_ACTIVE_NEG*/, 525 NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 526 }, 527 { /* tags */ 528 CFG_PARAM_UNSET, 529 0, 530 5, 531 3, /* 16 tags (??) */ 532 2, 533 }, 534 { /* reset delay */ 535 CFG_PARAM_UNSET, 536 0, 537 180, 538 1, /* 1 second */ 539 10, /* 10 seconds */ 540 } 541 }; 542 543 544 /* 545 * Safe settings. If set to zero the BIOS/default values with 546 * command line overrides will be used. If set to 1 then safe and 547 * slow settings will be used. 548 */ 549 static bool use_safe_settings = 0; 550 module_param_named(safe, use_safe_settings, bool, 0); 551 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); 552 553 554 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); 555 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); 556 557 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); 558 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); 559 560 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); 561 MODULE_PARM_DESC(dev_mode, "Device mode."); 562 563 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); 564 MODULE_PARM_DESC(adapter_mode, "Adapter mode."); 565 566 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); 567 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); 568 569 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); 570 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); 571 572 573 /** 574 * set_safe_settings - if the use_safe_settings option is set then 575 * set all values to the safe and slow values. 576 **/ 577 static void set_safe_settings(void) 578 { 579 if (use_safe_settings) 580 { 581 int i; 582 583 dprintkl(KERN_INFO, "Using safe settings.\n"); 584 for (i = 0; i < CFG_NUM; i++) 585 { 586 cfg_data[i].value = cfg_data[i].safe; 587 } 588 } 589 } 590 591 592 /** 593 * fix_settings - reset any boot parameters which are out of range 594 * back to the default values. 595 **/ 596 static void fix_settings(void) 597 { 598 int i; 599 600 dprintkdbg(DBG_1, 601 "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " 602 "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", 603 cfg_data[CFG_ADAPTER_ID].value, 604 cfg_data[CFG_MAX_SPEED].value, 605 cfg_data[CFG_DEV_MODE].value, 606 cfg_data[CFG_ADAPTER_MODE].value, 607 cfg_data[CFG_TAGS].value, 608 cfg_data[CFG_RESET_DELAY].value); 609 for (i = 0; i < CFG_NUM; i++) 610 { 611 if (cfg_data[i].value < cfg_data[i].min 612 || cfg_data[i].value > cfg_data[i].max) 613 cfg_data[i].value = cfg_data[i].def; 614 } 615 } 616 617 618 619 /* 620 * Mapping from the eeprom delay index value (index into this array) 621 * to the number of actual seconds that the delay should be for. 622 */ 623 static char eeprom_index_to_delay_map[] = 624 { 1, 3, 5, 10, 16, 30, 60, 120 }; 625 626 627 /** 628 * eeprom_index_to_delay - Take the eeprom delay setting and convert it 629 * into a number of seconds. 630 * 631 * @eeprom: The eeprom structure in which we find the delay index to map. 632 **/ 633 static void eeprom_index_to_delay(struct NvRamType *eeprom) 634 { 635 eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; 636 } 637 638 639 /** 640 * delay_to_eeprom_index - Take a delay in seconds and return the 641 * closest eeprom index which will delay for at least that amount of 642 * seconds. 643 * 644 * @delay: The delay, in seconds, to find the eeprom index for. 645 **/ 646 static int delay_to_eeprom_index(int delay) 647 { 648 u8 idx = 0; 649 while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) 650 idx++; 651 return idx; 652 } 653 654 655 /** 656 * eeprom_override - Override the eeprom settings, in the provided 657 * eeprom structure, with values that have been set on the command 658 * line. 659 * 660 * @eeprom: The eeprom data to override with command line options. 661 **/ 662 static void eeprom_override(struct NvRamType *eeprom) 663 { 664 u8 id; 665 666 /* Adapter Settings */ 667 if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) 668 eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; 669 670 if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) 671 eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; 672 673 if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) 674 eeprom->delay_time = delay_to_eeprom_index( 675 cfg_data[CFG_RESET_DELAY].value); 676 677 if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) 678 eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; 679 680 /* Device Settings */ 681 for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { 682 if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) 683 eeprom->target[id].cfg0 = 684 (u8)cfg_data[CFG_DEV_MODE].value; 685 686 if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) 687 eeprom->target[id].period = 688 (u8)cfg_data[CFG_MAX_SPEED].value; 689 690 } 691 } 692 693 694 /*--------------------------------------------------------------------------- 695 ---------------------------------------------------------------------------*/ 696 697 static unsigned int list_size(struct list_head *head) 698 { 699 unsigned int count = 0; 700 struct list_head *pos; 701 list_for_each(pos, head) 702 count++; 703 return count; 704 } 705 706 707 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, 708 struct DeviceCtlBlk *pos) 709 { 710 int use_next = 0; 711 struct DeviceCtlBlk* next = NULL; 712 struct DeviceCtlBlk* i; 713 714 if (list_empty(head)) 715 return NULL; 716 717 /* find supplied dcb and then select the next one */ 718 list_for_each_entry(i, head, list) 719 if (use_next) { 720 next = i; 721 break; 722 } else if (i == pos) { 723 use_next = 1; 724 } 725 /* if no next one take the head one (ie, wraparound) */ 726 if (!next) 727 list_for_each_entry(i, head, list) { 728 next = i; 729 break; 730 } 731 732 return next; 733 } 734 735 736 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 737 { 738 if (srb->tag_number < 255) { 739 dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ 740 srb->tag_number = 255; 741 } 742 } 743 744 745 /* Find cmd in SRB list */ 746 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, 747 struct list_head *head) 748 { 749 struct ScsiReqBlk *i; 750 list_for_each_entry(i, head, list) 751 if (i->cmd == cmd) 752 return i; 753 return NULL; 754 } 755 756 757 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) 758 { 759 struct list_head *head = &acb->srb_free_list; 760 struct ScsiReqBlk *srb = NULL; 761 762 if (!list_empty(head)) { 763 srb = list_entry(head->next, struct ScsiReqBlk, list); 764 list_del(head->next); 765 dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); 766 } 767 return srb; 768 } 769 770 771 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 772 { 773 dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); 774 list_add_tail(&srb->list, &acb->srb_free_list); 775 } 776 777 778 static void srb_waiting_insert(struct DeviceCtlBlk *dcb, 779 struct ScsiReqBlk *srb) 780 { 781 dprintkdbg(DBG_0, "srb_waiting_insert: (0x%p) <%02i-%i> srb=%p\n", 782 srb->cmd, dcb->target_id, dcb->target_lun, srb); 783 list_add(&srb->list, &dcb->srb_waiting_list); 784 } 785 786 787 static void srb_waiting_append(struct DeviceCtlBlk *dcb, 788 struct ScsiReqBlk *srb) 789 { 790 dprintkdbg(DBG_0, "srb_waiting_append: (0x%p) <%02i-%i> srb=%p\n", 791 srb->cmd, dcb->target_id, dcb->target_lun, srb); 792 list_add_tail(&srb->list, &dcb->srb_waiting_list); 793 } 794 795 796 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 797 { 798 dprintkdbg(DBG_0, "srb_going_append: (0x%p) <%02i-%i> srb=%p\n", 799 srb->cmd, dcb->target_id, dcb->target_lun, srb); 800 list_add_tail(&srb->list, &dcb->srb_going_list); 801 } 802 803 804 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 805 { 806 struct ScsiReqBlk *i; 807 struct ScsiReqBlk *tmp; 808 dprintkdbg(DBG_0, "srb_going_remove: (0x%p) <%02i-%i> srb=%p\n", 809 srb->cmd, dcb->target_id, dcb->target_lun, srb); 810 811 list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) 812 if (i == srb) { 813 list_del(&srb->list); 814 break; 815 } 816 } 817 818 819 static void srb_waiting_remove(struct DeviceCtlBlk *dcb, 820 struct ScsiReqBlk *srb) 821 { 822 struct ScsiReqBlk *i; 823 struct ScsiReqBlk *tmp; 824 dprintkdbg(DBG_0, "srb_waiting_remove: (0x%p) <%02i-%i> srb=%p\n", 825 srb->cmd, dcb->target_id, dcb->target_lun, srb); 826 827 list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) 828 if (i == srb) { 829 list_del(&srb->list); 830 break; 831 } 832 } 833 834 835 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, 836 struct ScsiReqBlk *srb) 837 { 838 dprintkdbg(DBG_0, 839 "srb_going_to_waiting_move: (0x%p) <%02i-%i> srb=%p\n", 840 srb->cmd, dcb->target_id, dcb->target_lun, srb); 841 list_move(&srb->list, &dcb->srb_waiting_list); 842 } 843 844 845 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, 846 struct ScsiReqBlk *srb) 847 { 848 dprintkdbg(DBG_0, 849 "srb_waiting_to_going_move: (0x%p) <%02i-%i> srb=%p\n", 850 srb->cmd, dcb->target_id, dcb->target_lun, srb); 851 list_move(&srb->list, &dcb->srb_going_list); 852 } 853 854 855 /* Sets the timer to wake us up */ 856 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) 857 { 858 if (timer_pending(&acb->waiting_timer)) 859 return; 860 init_timer(&acb->waiting_timer); 861 acb->waiting_timer.function = waiting_timeout; 862 acb->waiting_timer.data = (unsigned long) acb; 863 if (time_before(jiffies + to, acb->last_reset - HZ / 2)) 864 acb->waiting_timer.expires = 865 acb->last_reset - HZ / 2 + 1; 866 else 867 acb->waiting_timer.expires = jiffies + to + 1; 868 add_timer(&acb->waiting_timer); 869 } 870 871 872 /* Send the next command from the waiting list to the bus */ 873 static void waiting_process_next(struct AdapterCtlBlk *acb) 874 { 875 struct DeviceCtlBlk *start = NULL; 876 struct DeviceCtlBlk *pos; 877 struct DeviceCtlBlk *dcb; 878 struct ScsiReqBlk *srb; 879 struct list_head *dcb_list_head = &acb->dcb_list; 880 881 if (acb->active_dcb 882 || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) 883 return; 884 885 if (timer_pending(&acb->waiting_timer)) 886 del_timer(&acb->waiting_timer); 887 888 if (list_empty(dcb_list_head)) 889 return; 890 891 /* 892 * Find the starting dcb. Need to find it again in the list 893 * since the list may have changed since we set the ptr to it 894 */ 895 list_for_each_entry(dcb, dcb_list_head, list) 896 if (dcb == acb->dcb_run_robin) { 897 start = dcb; 898 break; 899 } 900 if (!start) { 901 /* This can happen! */ 902 start = list_entry(dcb_list_head->next, typeof(*start), list); 903 acb->dcb_run_robin = start; 904 } 905 906 907 /* 908 * Loop over the dcb, but we start somewhere (potentially) in 909 * the middle of the loop so we need to manully do this. 910 */ 911 pos = start; 912 do { 913 struct list_head *waiting_list_head = &pos->srb_waiting_list; 914 915 /* Make sure, the next another device gets scheduled ... */ 916 acb->dcb_run_robin = dcb_get_next(dcb_list_head, 917 acb->dcb_run_robin); 918 919 if (list_empty(waiting_list_head) || 920 pos->max_command <= list_size(&pos->srb_going_list)) { 921 /* move to next dcb */ 922 pos = dcb_get_next(dcb_list_head, pos); 923 } else { 924 srb = list_entry(waiting_list_head->next, 925 struct ScsiReqBlk, list); 926 927 /* Try to send to the bus */ 928 if (!start_scsi(acb, pos, srb)) 929 srb_waiting_to_going_move(pos, srb); 930 else 931 waiting_set_timer(acb, HZ/50); 932 break; 933 } 934 } while (pos != start); 935 } 936 937 938 /* Wake up waiting queue */ 939 static void waiting_timeout(unsigned long ptr) 940 { 941 unsigned long flags; 942 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 943 dprintkdbg(DBG_1, 944 "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); 945 DC395x_LOCK_IO(acb->scsi_host, flags); 946 waiting_process_next(acb); 947 DC395x_UNLOCK_IO(acb->scsi_host, flags); 948 } 949 950 951 /* Get the DCB for a given ID/LUN combination */ 952 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) 953 { 954 return acb->children[id][lun]; 955 } 956 957 958 /* Send SCSI Request Block (srb) to adapter (acb) */ 959 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 960 { 961 struct DeviceCtlBlk *dcb = srb->dcb; 962 963 if (dcb->max_command <= list_size(&dcb->srb_going_list) || 964 acb->active_dcb || 965 (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { 966 srb_waiting_append(dcb, srb); 967 waiting_process_next(acb); 968 return; 969 } 970 971 if (!start_scsi(acb, dcb, srb)) 972 srb_going_append(dcb, srb); 973 else { 974 srb_waiting_insert(dcb, srb); 975 waiting_set_timer(acb, HZ / 50); 976 } 977 } 978 979 /* Prepare SRB for being sent to Device DCB w/ command *cmd */ 980 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, 981 struct ScsiReqBlk *srb) 982 { 983 int nseg; 984 enum dma_data_direction dir = cmd->sc_data_direction; 985 dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", 986 cmd, dcb->target_id, dcb->target_lun); 987 988 srb->dcb = dcb; 989 srb->cmd = cmd; 990 srb->sg_count = 0; 991 srb->total_xfer_length = 0; 992 srb->sg_bus_addr = 0; 993 srb->sg_index = 0; 994 srb->adapter_status = 0; 995 srb->target_status = 0; 996 srb->msg_count = 0; 997 srb->status = 0; 998 srb->flag = 0; 999 srb->state = 0; 1000 srb->retry_count = 0; 1001 srb->tag_number = TAG_NONE; 1002 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1003 srb->end_message = 0; 1004 1005 nseg = scsi_dma_map(cmd); 1006 BUG_ON(nseg < 0); 1007 1008 if (dir == PCI_DMA_NONE || !nseg) { 1009 dprintkdbg(DBG_0, 1010 "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", 1011 cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), 1012 srb->segment_x[0].address); 1013 } else { 1014 int i; 1015 u32 reqlen = scsi_bufflen(cmd); 1016 struct scatterlist *sg; 1017 struct SGentry *sgp = srb->segment_x; 1018 1019 srb->sg_count = nseg; 1020 1021 dprintkdbg(DBG_0, 1022 "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", 1023 reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), 1024 srb->sg_count); 1025 1026 scsi_for_each_sg(cmd, sg, srb->sg_count, i) { 1027 u32 busaddr = (u32)sg_dma_address(sg); 1028 u32 seglen = (u32)sg->length; 1029 sgp[i].address = busaddr; 1030 sgp[i].length = seglen; 1031 srb->total_xfer_length += seglen; 1032 } 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 } 1059 1060 srb->request_length = srb->total_xfer_length; 1061 } 1062 1063 1064 /** 1065 * dc395x_queue_command - queue scsi command passed from the mid 1066 * layer, invoke 'done' on completion 1067 * 1068 * @cmd: pointer to scsi command object 1069 * @done: function pointer to be invoked on completion 1070 * 1071 * Returns 1 if the adapter (host) is busy, else returns 0. One 1072 * reason for an adapter to be busy is that the number 1073 * of outstanding queued commands is already equal to 1074 * struct Scsi_Host::can_queue . 1075 * 1076 * Required: if struct Scsi_Host::can_queue is ever non-zero 1077 * then this function is required. 1078 * 1079 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") 1080 * and is expected to be held on return. 1081 * 1082 **/ 1083 static int dc395x_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 1084 { 1085 struct DeviceCtlBlk *dcb; 1086 struct ScsiReqBlk *srb; 1087 struct AdapterCtlBlk *acb = 1088 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1089 dprintkdbg(DBG_0, "queue_command: (0x%p) <%02i-%i> cmnd=0x%02x\n", 1090 cmd, cmd->device->id, (u8)cmd->device->lun, cmd->cmnd[0]); 1091 1092 /* Assume BAD_TARGET; will be cleared later */ 1093 cmd->result = DID_BAD_TARGET << 16; 1094 1095 /* ignore invalid targets */ 1096 if (cmd->device->id >= acb->scsi_host->max_id || 1097 cmd->device->lun >= acb->scsi_host->max_lun || 1098 cmd->device->lun >31) { 1099 goto complete; 1100 } 1101 1102 /* does the specified lun on the specified device exist */ 1103 if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { 1104 dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", 1105 cmd->device->id, (u8)cmd->device->lun); 1106 goto complete; 1107 } 1108 1109 /* do we have a DCB for the device */ 1110 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1111 if (!dcb) { 1112 /* should never happen */ 1113 dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", 1114 cmd->device->id, (u8)cmd->device->lun); 1115 goto complete; 1116 } 1117 1118 /* set callback and clear result in the command */ 1119 cmd->scsi_done = done; 1120 cmd->result = 0; 1121 1122 srb = srb_get_free(acb); 1123 if (!srb) 1124 { 1125 /* 1126 * Return 1 since we are unable to queue this command at this 1127 * point in time. 1128 */ 1129 dprintkdbg(DBG_0, "queue_command: No free srb's\n"); 1130 return 1; 1131 } 1132 1133 build_srb(cmd, dcb, srb); 1134 1135 if (!list_empty(&dcb->srb_waiting_list)) { 1136 /* append to waiting queue */ 1137 srb_waiting_append(dcb, srb); 1138 waiting_process_next(acb); 1139 } else { 1140 /* process immediately */ 1141 send_srb(acb, srb); 1142 } 1143 dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); 1144 return 0; 1145 1146 complete: 1147 /* 1148 * Complete the command immediatey, and then return 0 to 1149 * indicate that we have handled the command. This is usually 1150 * done when the commad is for things like non existent 1151 * devices. 1152 */ 1153 done(cmd); 1154 return 0; 1155 } 1156 1157 static DEF_SCSI_QCMD(dc395x_queue_command) 1158 1159 /* 1160 * Return the disk geometry for the given SCSI device. 1161 */ 1162 static int dc395x_bios_param(struct scsi_device *sdev, 1163 struct block_device *bdev, sector_t capacity, int *info) 1164 { 1165 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP 1166 int heads, sectors, cylinders; 1167 struct AdapterCtlBlk *acb; 1168 int size = capacity; 1169 1170 dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); 1171 acb = (struct AdapterCtlBlk *)sdev->host->hostdata; 1172 heads = 64; 1173 sectors = 32; 1174 cylinders = size / (heads * sectors); 1175 1176 if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { 1177 heads = 255; 1178 sectors = 63; 1179 cylinders = size / (heads * sectors); 1180 } 1181 geom[0] = heads; 1182 geom[1] = sectors; 1183 geom[2] = cylinders; 1184 return 0; 1185 #else 1186 return scsicam_bios_param(bdev, capacity, info); 1187 #endif 1188 } 1189 1190 1191 static void dump_register_info(struct AdapterCtlBlk *acb, 1192 struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) 1193 { 1194 u16 pstat; 1195 struct pci_dev *dev = acb->dev; 1196 pci_read_config_word(dev, PCI_STATUS, &pstat); 1197 if (!dcb) 1198 dcb = acb->active_dcb; 1199 if (!srb && dcb) 1200 srb = dcb->active_srb; 1201 if (srb) { 1202 if (!srb->cmd) 1203 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", 1204 srb, srb->cmd); 1205 else 1206 dprintkl(KERN_INFO, "dump: srb=%p cmd=%p " 1207 "cmnd=0x%02x <%02i-%i>\n", 1208 srb, srb->cmd, 1209 srb->cmd->cmnd[0], srb->cmd->device->id, 1210 (u8)srb->cmd->device->lun); 1211 printk(" sglist=%p cnt=%i idx=%i len=%zu\n", 1212 srb->segment_x, srb->sg_count, srb->sg_index, 1213 srb->total_xfer_length); 1214 printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", 1215 srb->state, srb->status, srb->scsi_phase, 1216 (acb->active_dcb) ? "" : "not"); 1217 } 1218 dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " 1219 "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " 1220 "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " 1221 "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", 1222 DC395x_read16(acb, TRM_S1040_SCSI_STATUS), 1223 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 1224 DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), 1225 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), 1226 DC395x_read8(acb, TRM_S1040_SCSI_SYNC), 1227 DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), 1228 DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), 1229 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 1230 DC395x_read8(acb, TRM_S1040_SCSI_INTEN), 1231 DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), 1232 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), 1233 DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), 1234 DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); 1235 dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " 1236 "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " 1237 "ctctr=0x%08x addr=0x%08x:0x%08x}\n", 1238 DC395x_read16(acb, TRM_S1040_DMA_COMMAND), 1239 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 1240 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 1241 DC395x_read8(acb, TRM_S1040_DMA_STATUS), 1242 DC395x_read8(acb, TRM_S1040_DMA_INTEN), 1243 DC395x_read16(acb, TRM_S1040_DMA_CONFIG), 1244 DC395x_read32(acb, TRM_S1040_DMA_XCNT), 1245 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 1246 DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), 1247 DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); 1248 dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " 1249 "pci{status=0x%04x}\n", 1250 DC395x_read8(acb, TRM_S1040_GEN_CONTROL), 1251 DC395x_read8(acb, TRM_S1040_GEN_STATUS), 1252 DC395x_read8(acb, TRM_S1040_GEN_TIMER), 1253 pstat); 1254 } 1255 1256 1257 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) 1258 { 1259 #if debug_enabled(DBG_FIFO) 1260 u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1261 u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 1262 if (!(fifocnt & 0x40)) 1263 dprintkdbg(DBG_FIFO, 1264 "clear_fifo: (%i bytes) on phase %02x in %s\n", 1265 fifocnt & 0x3f, lines, txt); 1266 #endif 1267 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); 1268 } 1269 1270 1271 static void reset_dev_param(struct AdapterCtlBlk *acb) 1272 { 1273 struct DeviceCtlBlk *dcb; 1274 struct NvRamType *eeprom = &acb->eeprom; 1275 dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); 1276 1277 list_for_each_entry(dcb, &acb->dcb_list, list) { 1278 u8 period_index; 1279 1280 dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); 1281 dcb->sync_period = 0; 1282 dcb->sync_offset = 0; 1283 1284 dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; 1285 period_index = eeprom->target[dcb->target_id].period & 0x07; 1286 dcb->min_nego_period = clock_period[period_index]; 1287 if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) 1288 || !(acb->config & HCC_WIDE_CARD)) 1289 dcb->sync_mode &= ~WIDE_NEGO_ENABLE; 1290 } 1291 } 1292 1293 1294 /* 1295 * perform a hard reset on the SCSI bus 1296 * @cmd - some command for this host (for fetching hooks) 1297 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1298 */ 1299 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1300 { 1301 struct AdapterCtlBlk *acb = 1302 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1303 dprintkl(KERN_INFO, 1304 "eh_bus_reset: (0%p) target=<%02i-%i> cmd=%p\n", 1305 cmd, cmd->device->id, (u8)cmd->device->lun, cmd); 1306 1307 if (timer_pending(&acb->waiting_timer)) 1308 del_timer(&acb->waiting_timer); 1309 1310 /* 1311 * disable interrupt 1312 */ 1313 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 1314 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 1315 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 1316 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 1317 1318 reset_scsi_bus(acb); 1319 udelay(500); 1320 1321 /* We may be in serious trouble. Wait some seconds */ 1322 acb->last_reset = 1323 jiffies + 3 * HZ / 2 + 1324 HZ * acb->eeprom.delay_time; 1325 1326 /* 1327 * re-enable interrupt 1328 */ 1329 /* Clear SCSI FIFO */ 1330 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 1331 clear_fifo(acb, "eh_bus_reset"); 1332 /* Delete pending IRQ */ 1333 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1334 set_basic_config(acb); 1335 1336 reset_dev_param(acb); 1337 doing_srb_done(acb, DID_RESET, cmd, 0); 1338 acb->active_dcb = NULL; 1339 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ 1340 waiting_process_next(acb); 1341 1342 return SUCCESS; 1343 } 1344 1345 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) 1346 { 1347 int rc; 1348 1349 spin_lock_irq(cmd->device->host->host_lock); 1350 rc = __dc395x_eh_bus_reset(cmd); 1351 spin_unlock_irq(cmd->device->host->host_lock); 1352 1353 return rc; 1354 } 1355 1356 /* 1357 * abort an errant SCSI command 1358 * @cmd - command to be aborted 1359 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). 1360 */ 1361 static int dc395x_eh_abort(struct scsi_cmnd *cmd) 1362 { 1363 /* 1364 * Look into our command queues: If it has not been sent already, 1365 * we remove it and return success. Otherwise fail. 1366 */ 1367 struct AdapterCtlBlk *acb = 1368 (struct AdapterCtlBlk *)cmd->device->host->hostdata; 1369 struct DeviceCtlBlk *dcb; 1370 struct ScsiReqBlk *srb; 1371 dprintkl(KERN_INFO, "eh_abort: (0x%p) target=<%02i-%i> cmd=%p\n", 1372 cmd, cmd->device->id, (u8)cmd->device->lun, cmd); 1373 1374 dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); 1375 if (!dcb) { 1376 dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); 1377 return FAILED; 1378 } 1379 1380 srb = find_cmd(cmd, &dcb->srb_waiting_list); 1381 if (srb) { 1382 srb_waiting_remove(dcb, srb); 1383 pci_unmap_srb_sense(acb, srb); 1384 pci_unmap_srb(acb, srb); 1385 free_tag(dcb, srb); 1386 srb_free_insert(acb, srb); 1387 dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); 1388 cmd->result = DID_ABORT << 16; 1389 return SUCCESS; 1390 } 1391 srb = find_cmd(cmd, &dcb->srb_going_list); 1392 if (srb) { 1393 dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n"); 1394 /* XXX: Should abort the command here */ 1395 } else { 1396 dprintkl(KERN_DEBUG, "eh_abort: Command not found\n"); 1397 } 1398 return FAILED; 1399 } 1400 1401 1402 /* SDTR */ 1403 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1404 struct ScsiReqBlk *srb) 1405 { 1406 u8 *ptr = srb->msgout_buf + srb->msg_count; 1407 if (srb->msg_count > 1) { 1408 dprintkl(KERN_INFO, 1409 "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1410 srb->msg_count, srb->msgout_buf[0], 1411 srb->msgout_buf[1]); 1412 return; 1413 } 1414 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { 1415 dcb->sync_offset = 0; 1416 dcb->min_nego_period = 200 >> 2; 1417 } else if (dcb->sync_offset == 0) 1418 dcb->sync_offset = SYNC_NEGO_OFFSET; 1419 1420 *ptr++ = MSG_EXTENDED; /* (01h) */ 1421 *ptr++ = 3; /* length */ 1422 *ptr++ = EXTENDED_SDTR; /* (01h) */ 1423 *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ 1424 *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ 1425 srb->msg_count += 5; 1426 srb->state |= SRB_DO_SYNC_NEGO; 1427 } 1428 1429 1430 /* WDTR */ 1431 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 1432 struct ScsiReqBlk *srb) 1433 { 1434 u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & 1435 (acb->config & HCC_WIDE_CARD)) ? 1 : 0; 1436 u8 *ptr = srb->msgout_buf + srb->msg_count; 1437 if (srb->msg_count > 1) { 1438 dprintkl(KERN_INFO, 1439 "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", 1440 srb->msg_count, srb->msgout_buf[0], 1441 srb->msgout_buf[1]); 1442 return; 1443 } 1444 *ptr++ = MSG_EXTENDED; /* (01h) */ 1445 *ptr++ = 2; /* length */ 1446 *ptr++ = EXTENDED_WDTR; /* (03h) */ 1447 *ptr++ = wide; 1448 srb->msg_count += 4; 1449 srb->state |= SRB_DO_WIDE_NEGO; 1450 } 1451 1452 1453 #if 0 1454 /* Timer to work around chip flaw: When selecting and the bus is 1455 * busy, we sometimes miss a Selection timeout IRQ */ 1456 void selection_timeout_missed(unsigned long ptr); 1457 /* Sets the timer to wake us up */ 1458 static void selto_timer(struct AdapterCtlBlk *acb) 1459 { 1460 if (timer_pending(&acb->selto_timer)) 1461 return; 1462 acb->selto_timer.function = selection_timeout_missed; 1463 acb->selto_timer.data = (unsigned long) acb; 1464 if (time_before 1465 (jiffies + HZ, acb->last_reset + HZ / 2)) 1466 acb->selto_timer.expires = 1467 acb->last_reset + HZ / 2 + 1; 1468 else 1469 acb->selto_timer.expires = jiffies + HZ + 1; 1470 add_timer(&acb->selto_timer); 1471 } 1472 1473 1474 void selection_timeout_missed(unsigned long ptr) 1475 { 1476 unsigned long flags; 1477 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; 1478 struct ScsiReqBlk *srb; 1479 dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); 1480 if (!acb->active_dcb || !acb->active_dcb->active_srb) { 1481 dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); 1482 return; 1483 } 1484 DC395x_LOCK_IO(acb->scsi_host, flags); 1485 srb = acb->active_dcb->active_srb; 1486 disconnect(acb); 1487 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1488 } 1489 #endif 1490 1491 1492 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, 1493 struct ScsiReqBlk* srb) 1494 { 1495 u16 s_stat2, return_code; 1496 u8 s_stat, scsicommand, i, identify_message; 1497 u8 *ptr; 1498 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", 1499 dcb->target_id, dcb->target_lun, srb); 1500 1501 srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ 1502 1503 s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 1504 s_stat2 = 0; 1505 s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1506 #if 1 1507 if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { 1508 dprintkdbg(DBG_KG, "start_scsi: (0x%p) BUSY %02x %04x\n", 1509 s_stat, s_stat2); 1510 /* 1511 * Try anyway? 1512 * 1513 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection 1514 * Timeout, a Disconnect or a Reselection IRQ, so we would be screwed! 1515 * (This is likely to be a bug in the hardware. Obviously, most people 1516 * only have one initiator per SCSI bus.) 1517 * Instead let this fail and have the timer make sure the command is 1518 * tried again after a short time 1519 */ 1520 /*selto_timer (acb); */ 1521 return 1; 1522 } 1523 #endif 1524 if (acb->active_dcb) { 1525 dprintkl(KERN_DEBUG, "start_scsi: (0x%p) Attempt to start a" 1526 "command while another command (0x%p) is active.", 1527 srb->cmd, 1528 acb->active_dcb->active_srb ? 1529 acb->active_dcb->active_srb->cmd : 0); 1530 return 1; 1531 } 1532 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1533 dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); 1534 return 1; 1535 } 1536 /* Allow starting of SCSI commands half a second before we allow the mid-level 1537 * to queue them again after a reset */ 1538 if (time_before(jiffies, acb->last_reset - HZ / 2)) { 1539 dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); 1540 return 1; 1541 } 1542 1543 /* Flush FIFO */ 1544 clear_fifo(acb, "start_scsi"); 1545 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 1546 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 1547 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 1548 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 1549 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1550 1551 identify_message = dcb->identify_msg; 1552 /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ 1553 /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ 1554 if (srb->flag & AUTO_REQSENSE) 1555 identify_message &= 0xBF; 1556 1557 if (((srb->cmd->cmnd[0] == INQUIRY) 1558 || (srb->cmd->cmnd[0] == REQUEST_SENSE) 1559 || (srb->flag & AUTO_REQSENSE)) 1560 && (((dcb->sync_mode & WIDE_NEGO_ENABLE) 1561 && !(dcb->sync_mode & WIDE_NEGO_DONE)) 1562 || ((dcb->sync_mode & SYNC_NEGO_ENABLE) 1563 && !(dcb->sync_mode & SYNC_NEGO_DONE))) 1564 && (dcb->target_lun == 0)) { 1565 srb->msgout_buf[0] = identify_message; 1566 srb->msg_count = 1; 1567 scsicommand = SCMD_SEL_ATNSTOP; 1568 srb->state = SRB_MSGOUT; 1569 #ifndef SYNC_FIRST 1570 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1571 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1572 build_wdtr(acb, dcb, srb); 1573 goto no_cmd; 1574 } 1575 #endif 1576 if (dcb->sync_mode & SYNC_NEGO_ENABLE 1577 && dcb->inquiry7 & SCSI_INQ_SYNC) { 1578 build_sdtr(acb, dcb, srb); 1579 goto no_cmd; 1580 } 1581 if (dcb->sync_mode & WIDE_NEGO_ENABLE 1582 && dcb->inquiry7 & SCSI_INQ_WBUS16) { 1583 build_wdtr(acb, dcb, srb); 1584 goto no_cmd; 1585 } 1586 srb->msg_count = 0; 1587 } 1588 /* Send identify message */ 1589 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); 1590 1591 scsicommand = SCMD_SEL_ATN; 1592 srb->state = SRB_START_; 1593 #ifndef DC395x_NO_TAGQ 1594 if ((dcb->sync_mode & EN_TAG_QUEUEING) 1595 && (identify_message & 0xC0)) { 1596 /* Send Tag message */ 1597 u32 tag_mask = 1; 1598 u8 tag_number = 0; 1599 while (tag_mask & dcb->tag_mask 1600 && tag_number < dcb->max_command) { 1601 tag_mask = tag_mask << 1; 1602 tag_number++; 1603 } 1604 if (tag_number >= dcb->max_command) { 1605 dprintkl(KERN_WARNING, "start_scsi: (0x%p) " 1606 "Out of tags target=<%02i-%i>)\n", 1607 srb->cmd, srb->cmd->device->id, 1608 (u8)srb->cmd->device->lun); 1609 srb->state = SRB_READY; 1610 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1611 DO_HWRESELECT); 1612 return 1; 1613 } 1614 /* Send Tag id */ 1615 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); 1616 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); 1617 dcb->tag_mask |= tag_mask; 1618 srb->tag_number = tag_number; 1619 scsicommand = SCMD_SEL_ATN3; 1620 srb->state = SRB_START_; 1621 } 1622 #endif 1623 /*polling:*/ 1624 /* Send CDB ..command block ......... */ 1625 dprintkdbg(DBG_KG, "start_scsi: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", 1626 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, 1627 srb->cmd->cmnd[0], srb->tag_number); 1628 if (srb->flag & AUTO_REQSENSE) { 1629 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1630 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1631 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1632 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1633 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1634 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1635 } else { 1636 ptr = (u8 *)srb->cmd->cmnd; 1637 for (i = 0; i < srb->cmd->cmd_len; i++) 1638 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1639 } 1640 no_cmd: 1641 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1642 DO_HWRESELECT | DO_DATALATCH); 1643 if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { 1644 /* 1645 * If start_scsi return 1: 1646 * we caught an interrupt (must be reset or reselection ... ) 1647 * : Let's process it first! 1648 */ 1649 dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> Failed - busy\n", 1650 srb->cmd, dcb->target_id, dcb->target_lun); 1651 srb->state = SRB_READY; 1652 free_tag(dcb, srb); 1653 srb->msg_count = 0; 1654 return_code = 1; 1655 /* This IRQ should NOT get lost, as we did not acknowledge it */ 1656 } else { 1657 /* 1658 * If start_scsi returns 0: 1659 * we know that the SCSI processor is free 1660 */ 1661 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 1662 dcb->active_srb = srb; 1663 acb->active_dcb = dcb; 1664 return_code = 0; 1665 /* it's important for atn stop */ 1666 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 1667 DO_DATALATCH | DO_HWRESELECT); 1668 /* SCSI command */ 1669 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); 1670 } 1671 return return_code; 1672 } 1673 1674 1675 #define DC395x_ENABLE_MSGOUT \ 1676 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ 1677 srb->state |= SRB_MSGOUT 1678 1679 1680 /* abort command */ 1681 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, 1682 struct ScsiReqBlk *srb) 1683 { 1684 srb->msgout_buf[0] = ABORT; 1685 srb->msg_count = 1; 1686 DC395x_ENABLE_MSGOUT; 1687 srb->state &= ~SRB_MSGIN; 1688 srb->state |= SRB_MSGOUT; 1689 } 1690 1691 1692 /** 1693 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to 1694 * have been triggered for this card. 1695 * 1696 * @acb: a pointer to the adpter control block 1697 * @scsi_status: the status return when we checked the card 1698 **/ 1699 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, 1700 u16 scsi_status) 1701 { 1702 struct DeviceCtlBlk *dcb; 1703 struct ScsiReqBlk *srb; 1704 u16 phase; 1705 u8 scsi_intstatus; 1706 unsigned long flags; 1707 void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 1708 u16 *); 1709 1710 DC395x_LOCK_IO(acb->scsi_host, flags); 1711 1712 /* This acknowledges the IRQ */ 1713 scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 1714 if ((scsi_status & 0x2007) == 0x2002) 1715 dprintkl(KERN_DEBUG, 1716 "COP after COP completed? %04x\n", scsi_status); 1717 if (debug_enabled(DBG_KG)) { 1718 if (scsi_intstatus & INT_SELTIMEOUT) 1719 dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); 1720 } 1721 /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ 1722 1723 if (timer_pending(&acb->selto_timer)) 1724 del_timer(&acb->selto_timer); 1725 1726 if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { 1727 disconnect(acb); /* bus free interrupt */ 1728 goto out_unlock; 1729 } 1730 if (scsi_intstatus & INT_RESELECTED) { 1731 reselect(acb); 1732 goto out_unlock; 1733 } 1734 if (scsi_intstatus & INT_SELECT) { 1735 dprintkl(KERN_INFO, "Host does not support target mode!\n"); 1736 goto out_unlock; 1737 } 1738 if (scsi_intstatus & INT_SCSIRESET) { 1739 scsi_reset_detect(acb); 1740 goto out_unlock; 1741 } 1742 if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { 1743 dcb = acb->active_dcb; 1744 if (!dcb) { 1745 dprintkl(KERN_DEBUG, 1746 "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", 1747 scsi_status, scsi_intstatus); 1748 goto out_unlock; 1749 } 1750 srb = dcb->active_srb; 1751 if (dcb->flag & ABORT_DEV_) { 1752 dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); 1753 enable_msgout_abort(acb, srb); 1754 } 1755 1756 /* software sequential machine */ 1757 phase = (u16)srb->scsi_phase; 1758 1759 /* 1760 * 62037 or 62137 1761 * call dc395x_scsi_phase0[]... "phase entry" 1762 * handle every phase before start transfer 1763 */ 1764 /* data_out_phase0, phase:0 */ 1765 /* data_in_phase0, phase:1 */ 1766 /* command_phase0, phase:2 */ 1767 /* status_phase0, phase:3 */ 1768 /* nop0, phase:4 PH_BUS_FREE .. initial phase */ 1769 /* nop0, phase:5 PH_BUS_FREE .. initial phase */ 1770 /* msgout_phase0, phase:6 */ 1771 /* msgin_phase0, phase:7 */ 1772 dc395x_statev = dc395x_scsi_phase0[phase]; 1773 dc395x_statev(acb, srb, &scsi_status); 1774 1775 /* 1776 * if there were any exception occurred scsi_status 1777 * will be modify to bus free phase new scsi_status 1778 * transfer out from ... previous dc395x_statev 1779 */ 1780 srb->scsi_phase = scsi_status & PHASEMASK; 1781 phase = (u16)scsi_status & PHASEMASK; 1782 1783 /* 1784 * call dc395x_scsi_phase1[]... "phase entry" handle 1785 * every phase to do transfer 1786 */ 1787 /* data_out_phase1, phase:0 */ 1788 /* data_in_phase1, phase:1 */ 1789 /* command_phase1, phase:2 */ 1790 /* status_phase1, phase:3 */ 1791 /* nop1, phase:4 PH_BUS_FREE .. initial phase */ 1792 /* nop1, phase:5 PH_BUS_FREE .. initial phase */ 1793 /* msgout_phase1, phase:6 */ 1794 /* msgin_phase1, phase:7 */ 1795 dc395x_statev = dc395x_scsi_phase1[phase]; 1796 dc395x_statev(acb, srb, &scsi_status); 1797 } 1798 out_unlock: 1799 DC395x_UNLOCK_IO(acb->scsi_host, flags); 1800 } 1801 1802 1803 static irqreturn_t dc395x_interrupt(int irq, void *dev_id) 1804 { 1805 struct AdapterCtlBlk *acb = dev_id; 1806 u16 scsi_status; 1807 u8 dma_status; 1808 irqreturn_t handled = IRQ_NONE; 1809 1810 /* 1811 * Check for pending interrupt 1812 */ 1813 scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); 1814 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 1815 if (scsi_status & SCSIINTERRUPT) { 1816 /* interrupt pending - let's process it! */ 1817 dc395x_handle_interrupt(acb, scsi_status); 1818 handled = IRQ_HANDLED; 1819 } 1820 else if (dma_status & 0x20) { 1821 /* Error from the DMA engine */ 1822 dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); 1823 #if 0 1824 dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); 1825 if (acb->active_dcb) { 1826 acb->active_dcb-> flag |= ABORT_DEV_; 1827 if (acb->active_dcb->active_srb) 1828 enable_msgout_abort(acb, acb->active_dcb->active_srb); 1829 } 1830 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); 1831 #else 1832 dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); 1833 acb = NULL; 1834 #endif 1835 handled = IRQ_HANDLED; 1836 } 1837 1838 return handled; 1839 } 1840 1841 1842 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1843 u16 *pscsi_status) 1844 { 1845 dprintkdbg(DBG_0, "msgout_phase0: (0x%p)\n", srb->cmd); 1846 if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) 1847 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 1848 1849 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1850 srb->state &= ~SRB_MSGOUT; 1851 } 1852 1853 1854 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1855 u16 *pscsi_status) 1856 { 1857 u16 i; 1858 u8 *ptr; 1859 dprintkdbg(DBG_0, "msgout_phase1: (0x%p)\n", srb->cmd); 1860 1861 clear_fifo(acb, "msgout_phase1"); 1862 if (!(srb->state & SRB_MSGOUT)) { 1863 srb->state |= SRB_MSGOUT; 1864 dprintkl(KERN_DEBUG, 1865 "msgout_phase1: (0x%p) Phase unexpected\n", 1866 srb->cmd); /* So what ? */ 1867 } 1868 if (!srb->msg_count) { 1869 dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", 1870 srb->cmd); 1871 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); 1872 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 1873 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1874 return; 1875 } 1876 ptr = (u8 *)srb->msgout_buf; 1877 for (i = 0; i < srb->msg_count; i++) 1878 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); 1879 srb->msg_count = 0; 1880 if (srb->msgout_buf[0] == MSG_ABORT) 1881 srb->state = SRB_ABORT_SENT; 1882 1883 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1884 } 1885 1886 1887 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1888 u16 *pscsi_status) 1889 { 1890 dprintkdbg(DBG_0, "command_phase0: (0x%p)\n", srb->cmd); 1891 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1892 } 1893 1894 1895 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 1896 u16 *pscsi_status) 1897 { 1898 struct DeviceCtlBlk *dcb; 1899 u8 *ptr; 1900 u16 i; 1901 dprintkdbg(DBG_0, "command_phase1: (0x%p)\n", srb->cmd); 1902 1903 clear_fifo(acb, "command_phase1"); 1904 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); 1905 if (!(srb->flag & AUTO_REQSENSE)) { 1906 ptr = (u8 *)srb->cmd->cmnd; 1907 for (i = 0; i < srb->cmd->cmd_len; i++) { 1908 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); 1909 ptr++; 1910 } 1911 } else { 1912 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); 1913 dcb = acb->active_dcb; 1914 /* target id */ 1915 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); 1916 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1917 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1918 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE); 1919 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 1920 } 1921 srb->state |= SRB_COMMAND; 1922 /* it's important for atn stop */ 1923 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 1924 /* SCSI command */ 1925 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); 1926 } 1927 1928 1929 /* 1930 * Verify that the remaining space in the hw sg lists is the same as 1931 * the count of remaining bytes in srb->total_xfer_length 1932 */ 1933 static void sg_verify_length(struct ScsiReqBlk *srb) 1934 { 1935 if (debug_enabled(DBG_SG)) { 1936 unsigned len = 0; 1937 unsigned idx = srb->sg_index; 1938 struct SGentry *psge = srb->segment_x + idx; 1939 for (; idx < srb->sg_count; psge++, idx++) 1940 len += psge->length; 1941 if (len != srb->total_xfer_length) 1942 dprintkdbg(DBG_SG, 1943 "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", 1944 srb->total_xfer_length, len); 1945 } 1946 } 1947 1948 1949 /* 1950 * Compute the next Scatter Gather list index and adjust its length 1951 * and address if necessary 1952 */ 1953 static void sg_update_list(struct ScsiReqBlk *srb, u32 left) 1954 { 1955 u8 idx; 1956 u32 xferred = srb->total_xfer_length - left; /* bytes transferred */ 1957 struct SGentry *psge = srb->segment_x + srb->sg_index; 1958 1959 dprintkdbg(DBG_0, 1960 "sg_update_list: Transferred %i of %i bytes, %i remain\n", 1961 xferred, srb->total_xfer_length, left); 1962 if (xferred == 0) { 1963 /* nothing to update since we did not transfer any data */ 1964 return; 1965 } 1966 1967 sg_verify_length(srb); 1968 srb->total_xfer_length = left; /* update remaining count */ 1969 for (idx = srb->sg_index; idx < srb->sg_count; idx++) { 1970 if (xferred >= psge->length) { 1971 /* Complete SG entries done */ 1972 xferred -= psge->length; 1973 } else { 1974 /* Partial SG entry done */ 1975 psge->length -= xferred; 1976 psge->address += xferred; 1977 srb->sg_index = idx; 1978 pci_dma_sync_single_for_device(srb->dcb-> 1979 acb->dev, 1980 srb->sg_bus_addr, 1981 SEGMENTX_LEN, 1982 PCI_DMA_TODEVICE); 1983 break; 1984 } 1985 psge++; 1986 } 1987 sg_verify_length(srb); 1988 } 1989 1990 1991 /* 1992 * We have transferred a single byte (PIO mode?) and need to update 1993 * the count of bytes remaining (total_xfer_length) and update the sg 1994 * entry to either point to next byte in the current sg entry, or of 1995 * already at the end to point to the start of the next sg entry 1996 */ 1997 static void sg_subtract_one(struct ScsiReqBlk *srb) 1998 { 1999 sg_update_list(srb, srb->total_xfer_length - 1); 2000 } 2001 2002 2003 /* 2004 * cleanup_after_transfer 2005 * 2006 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished 2007 * KG: Currently called from StatusPhase1 () 2008 * Should probably also be called from other places 2009 * Best might be to call it in DataXXPhase0, if new phase will differ 2010 */ 2011 static void cleanup_after_transfer(struct AdapterCtlBlk *acb, 2012 struct ScsiReqBlk *srb) 2013 { 2014 /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ 2015 if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ 2016 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2017 clear_fifo(acb, "cleanup/in"); 2018 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2019 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2020 } else { /* write */ 2021 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) 2022 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2023 if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) 2024 clear_fifo(acb, "cleanup/out"); 2025 } 2026 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); 2027 } 2028 2029 2030 /* 2031 * Those no of bytes will be transferred w/ PIO through the SCSI FIFO 2032 * Seems to be needed for unknown reasons; could be a hardware bug :-( 2033 */ 2034 #define DC395x_LASTPIO 4 2035 2036 2037 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2038 u16 *pscsi_status) 2039 { 2040 struct DeviceCtlBlk *dcb = srb->dcb; 2041 u16 scsi_status = *pscsi_status; 2042 u32 d_left_counter = 0; 2043 dprintkdbg(DBG_0, "data_out_phase0: (0x%p) <%02i-%i>\n", 2044 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2045 2046 /* 2047 * KG: We need to drain the buffers before we draw any conclusions! 2048 * This means telling the DMA to push the rest into SCSI, telling 2049 * SCSI to push the rest to the bus. 2050 * However, the device might have been the one to stop us (phase 2051 * change), and the data in transit just needs to be accounted so 2052 * it can be retransmitted.) 2053 */ 2054 /* 2055 * KG: Stop DMA engine pushing more data into the SCSI FIFO 2056 * If we need more data, the DMA SG list will be freshly set up, anyway 2057 */ 2058 dprintkdbg(DBG_PIO, "data_out_phase0: " 2059 "DMA{fifocnt=0x%02x fifostat=0x%02x} " 2060 "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", 2061 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2062 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2063 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2064 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, 2065 srb->total_xfer_length); 2066 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); 2067 2068 if (!(srb->state & SRB_XFERPAD)) { 2069 if (scsi_status & PARITYERROR) 2070 srb->status |= PARITY_ERROR; 2071 2072 /* 2073 * KG: Right, we can't just rely on the SCSI_COUNTER, because this 2074 * is the no of bytes it got from the DMA engine not the no it 2075 * transferred successfully to the device. (And the difference could 2076 * be as much as the FIFO size, I guess ...) 2077 */ 2078 if (!(scsi_status & SCSIXFERDONE)) { 2079 /* 2080 * when data transfer from DMA FIFO to SCSI FIFO 2081 * if there was some data left in SCSI FIFO 2082 */ 2083 d_left_counter = 2084 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2085 0x1F); 2086 if (dcb->sync_period & WIDE_SYNC) 2087 d_left_counter <<= 1; 2088 2089 dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" 2090 "SCSI{fifocnt=0x%02x cnt=0x%08x} " 2091 "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", 2092 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2093 (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2094 DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), 2095 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), 2096 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2097 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2098 DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); 2099 } 2100 /* 2101 * calculate all the residue data that not yet tranfered 2102 * SCSI transfer counter + left in SCSI FIFO data 2103 * 2104 * .....TRM_S1040_SCSI_COUNTER (24bits) 2105 * The counter always decrement by one for every SCSI byte transfer. 2106 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) 2107 * The counter is SCSI FIFO offset counter (in units of bytes or! words) 2108 */ 2109 if (srb->total_xfer_length > DC395x_LASTPIO) 2110 d_left_counter += 2111 DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2112 2113 /* Is this a good idea? */ 2114 /*clear_fifo(acb, "DOP1"); */ 2115 /* KG: What is this supposed to be useful for? WIDE padding stuff? */ 2116 if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC 2117 && scsi_bufflen(srb->cmd) % 2) { 2118 d_left_counter = 0; 2119 dprintkl(KERN_INFO, 2120 "data_out_phase0: Discard 1 byte (0x%02x)\n", 2121 scsi_status); 2122 } 2123 /* 2124 * KG: Oops again. Same thinko as above: The SCSI might have been 2125 * faster than the DMA engine, so that it ran out of data. 2126 * In that case, we have to do just nothing! 2127 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? 2128 */ 2129 /* 2130 * KG: This is nonsense: We have been WRITING data to the bus 2131 * If the SCSI engine has no bytes left, how should the DMA engine? 2132 */ 2133 if (d_left_counter == 0) { 2134 srb->total_xfer_length = 0; 2135 } else { 2136 /* 2137 * if transfer not yet complete 2138 * there were some data residue in SCSI FIFO or 2139 * SCSI transfer counter not empty 2140 */ 2141 long oldxferred = 2142 srb->total_xfer_length - d_left_counter; 2143 const int diff = 2144 (dcb->sync_period & WIDE_SYNC) ? 2 : 1; 2145 sg_update_list(srb, d_left_counter); 2146 /* KG: Most ugly hack! Apparently, this works around a chip bug */ 2147 if ((srb->segment_x[srb->sg_index].length == 2148 diff && scsi_sg_count(srb->cmd)) 2149 || ((oldxferred & ~PAGE_MASK) == 2150 (PAGE_SIZE - diff)) 2151 ) { 2152 dprintkl(KERN_INFO, "data_out_phase0: " 2153 "Work around chip bug (%i)?\n", diff); 2154 d_left_counter = 2155 srb->total_xfer_length - diff; 2156 sg_update_list(srb, d_left_counter); 2157 /*srb->total_xfer_length -= diff; */ 2158 /*srb->virt_addr += diff; */ 2159 /*if (srb->cmd->use_sg) */ 2160 /* srb->sg_index++; */ 2161 } 2162 } 2163 } 2164 if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { 2165 cleanup_after_transfer(acb, srb); 2166 } 2167 } 2168 2169 2170 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2171 u16 *pscsi_status) 2172 { 2173 dprintkdbg(DBG_0, "data_out_phase1: (0x%p) <%02i-%i>\n", 2174 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2175 clear_fifo(acb, "data_out_phase1"); 2176 /* do prepare before transfer when data out phase */ 2177 data_io_transfer(acb, srb, XFERDATAOUT); 2178 } 2179 2180 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2181 u16 *pscsi_status) 2182 { 2183 u16 scsi_status = *pscsi_status; 2184 2185 dprintkdbg(DBG_0, "data_in_phase0: (0x%p) <%02i-%i>\n", 2186 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2187 2188 /* 2189 * KG: DataIn is much more tricky than DataOut. When the device is finished 2190 * and switches to another phase, the SCSI engine should be finished too. 2191 * But: There might still be bytes left in its FIFO to be fetched by the DMA 2192 * engine and transferred to memory. 2193 * We should wait for the FIFOs to be emptied by that (is there any way to 2194 * enforce this?) and then stop the DMA engine, because it might think, that 2195 * there are more bytes to follow. Yes, the device might disconnect prior to 2196 * having all bytes transferred! 2197 * Also we should make sure that all data from the DMA engine buffer's really 2198 * made its way to the system memory! Some documentation on this would not 2199 * seem to be a bad idea, actually. 2200 */ 2201 if (!(srb->state & SRB_XFERPAD)) { 2202 u32 d_left_counter; 2203 unsigned int sc, fc; 2204 2205 if (scsi_status & PARITYERROR) { 2206 dprintkl(KERN_INFO, "data_in_phase0: (0x%p) " 2207 "Parity Error\n", srb->cmd); 2208 srb->status |= PARITY_ERROR; 2209 } 2210 /* 2211 * KG: We should wait for the DMA FIFO to be empty ... 2212 * but: it would be better to wait first for the SCSI FIFO and then the 2213 * the DMA FIFO to become empty? How do we know, that the device not already 2214 * sent data to the FIFO in a MsgIn phase, eg.? 2215 */ 2216 if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { 2217 #if 0 2218 int ctr = 6000000; 2219 dprintkl(KERN_DEBUG, 2220 "DIP0: Wait for DMA FIFO to flush ...\n"); 2221 /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ 2222 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ 2223 /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ 2224 while (! 2225 (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & 2226 0x80) && --ctr); 2227 if (ctr < 6000000 - 1) 2228 dprintkl(KERN_DEBUG 2229 "DIP0: Had to wait for DMA ...\n"); 2230 if (!ctr) 2231 dprintkl(KERN_ERR, 2232 "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); 2233 /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ 2234 #endif 2235 dprintkdbg(DBG_KG, "data_in_phase0: " 2236 "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", 2237 DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), 2238 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); 2239 } 2240 /* Now: Check remainig data: The SCSI counters should tell us ... */ 2241 sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); 2242 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2243 d_left_counter = sc + ((fc & 0x1f) 2244 << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : 2245 0)); 2246 dprintkdbg(DBG_KG, "data_in_phase0: " 2247 "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " 2248 "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " 2249 "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", 2250 fc, 2251 (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", 2252 sc, 2253 fc, 2254 DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), 2255 DC395x_read32(acb, TRM_S1040_DMA_CXCNT), 2256 srb->total_xfer_length, d_left_counter); 2257 #if DC395x_LASTPIO 2258 /* KG: Less than or equal to 4 bytes can not be transferred via DMA, it seems. */ 2259 if (d_left_counter 2260 && srb->total_xfer_length <= DC395x_LASTPIO) { 2261 size_t left_io = srb->total_xfer_length; 2262 2263 /*u32 addr = (srb->segment_x[srb->sg_index].address); */ 2264 /*sg_update_list (srb, d_left_counter); */ 2265 dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) " 2266 "for remaining %i bytes:", 2267 fc & 0x1f, 2268 (srb->dcb->sync_period & WIDE_SYNC) ? 2269 "words" : "bytes", 2270 srb->total_xfer_length); 2271 if (srb->dcb->sync_period & WIDE_SYNC) 2272 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2273 CFG2_WIDEFIFO); 2274 while (left_io) { 2275 unsigned char *virt, *base = NULL; 2276 unsigned long flags = 0; 2277 size_t len = left_io; 2278 size_t offset = srb->request_length - left_io; 2279 2280 local_irq_save(flags); 2281 /* Assumption: it's inside one page as it's at most 4 bytes and 2282 I just assume it's on a 4-byte boundary */ 2283 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2284 srb->sg_count, &offset, &len); 2285 virt = base + offset; 2286 2287 left_io -= len; 2288 2289 while (len) { 2290 u8 byte; 2291 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2292 *virt++ = byte; 2293 2294 if (debug_enabled(DBG_PIO)) 2295 printk(" %02x", byte); 2296 2297 d_left_counter--; 2298 sg_subtract_one(srb); 2299 2300 len--; 2301 2302 fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); 2303 2304 if (fc == 0x40) { 2305 left_io = 0; 2306 break; 2307 } 2308 } 2309 2310 WARN_ON((fc != 0x40) == !d_left_counter); 2311 2312 if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) { 2313 /* Read the last byte ... */ 2314 if (srb->total_xfer_length > 0) { 2315 u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2316 2317 *virt++ = byte; 2318 srb->total_xfer_length--; 2319 if (debug_enabled(DBG_PIO)) 2320 printk(" %02x", byte); 2321 } 2322 2323 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2324 } 2325 2326 scsi_kunmap_atomic_sg(base); 2327 local_irq_restore(flags); 2328 } 2329 /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ 2330 /*srb->total_xfer_length = 0; */ 2331 if (debug_enabled(DBG_PIO)) 2332 printk("\n"); 2333 } 2334 #endif /* DC395x_LASTPIO */ 2335 2336 #if 0 2337 /* 2338 * KG: This was in DATAOUT. Does it also belong here? 2339 * Nobody seems to know what counter and fifo_cnt count exactly ... 2340 */ 2341 if (!(scsi_status & SCSIXFERDONE)) { 2342 /* 2343 * when data transfer from DMA FIFO to SCSI FIFO 2344 * if there was some data left in SCSI FIFO 2345 */ 2346 d_left_counter = 2347 (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 2348 0x1F); 2349 if (srb->dcb->sync_period & WIDE_SYNC) 2350 d_left_counter <<= 1; 2351 /* 2352 * if WIDE scsi SCSI FIFOCNT unit is word !!! 2353 * so need to *= 2 2354 * KG: Seems to be correct ... 2355 */ 2356 } 2357 #endif 2358 /* KG: This should not be needed any more! */ 2359 if (d_left_counter == 0 2360 || (scsi_status & SCSIXFERCNT_2_ZERO)) { 2361 #if 0 2362 int ctr = 6000000; 2363 u8 TempDMAstatus; 2364 do { 2365 TempDMAstatus = 2366 DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2367 } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); 2368 if (!ctr) 2369 dprintkl(KERN_ERR, 2370 "Deadlock in DataInPhase0 waiting for DMA!!\n"); 2371 srb->total_xfer_length = 0; 2372 #endif 2373 srb->total_xfer_length = d_left_counter; 2374 } else { /* phase changed */ 2375 /* 2376 * parsing the case: 2377 * when a transfer not yet complete 2378 * but be disconnected by target 2379 * if transfer not yet complete 2380 * there were some data residue in SCSI FIFO or 2381 * SCSI transfer counter not empty 2382 */ 2383 sg_update_list(srb, d_left_counter); 2384 } 2385 } 2386 /* KG: The target may decide to disconnect: Empty FIFO before! */ 2387 if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { 2388 cleanup_after_transfer(acb, srb); 2389 } 2390 } 2391 2392 2393 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2394 u16 *pscsi_status) 2395 { 2396 dprintkdbg(DBG_0, "data_in_phase1: (0x%p) <%02i-%i>\n", 2397 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2398 data_io_transfer(acb, srb, XFERDATAIN); 2399 } 2400 2401 2402 static void data_io_transfer(struct AdapterCtlBlk *acb, 2403 struct ScsiReqBlk *srb, u16 io_dir) 2404 { 2405 struct DeviceCtlBlk *dcb = srb->dcb; 2406 u8 bval; 2407 dprintkdbg(DBG_0, 2408 "data_io_transfer: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", 2409 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun, 2410 ((io_dir & DMACMD_DIR) ? 'r' : 'w'), 2411 srb->total_xfer_length, srb->sg_index, srb->sg_count); 2412 if (srb == acb->tmp_srb) 2413 dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); 2414 if (srb->sg_index >= srb->sg_count) { 2415 /* can't happen? out of bounds error */ 2416 return; 2417 } 2418 2419 if (srb->total_xfer_length > DC395x_LASTPIO) { 2420 u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); 2421 /* 2422 * KG: What should we do: Use SCSI Cmd 0x90/0x92? 2423 * Maybe, even ABORTXFER would be appropriate 2424 */ 2425 if (dma_status & XFERPENDING) { 2426 dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " 2427 "Expect trouble!\n"); 2428 dump_register_info(acb, dcb, srb); 2429 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); 2430 } 2431 /* clear_fifo(acb, "IO"); */ 2432 /* 2433 * load what physical address of Scatter/Gather list table 2434 * want to be transfer 2435 */ 2436 srb->state |= SRB_DATA_XFER; 2437 DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); 2438 if (scsi_sg_count(srb->cmd)) { /* with S/G */ 2439 io_dir |= DMACMD_SG; 2440 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2441 srb->sg_bus_addr + 2442 sizeof(struct SGentry) * 2443 srb->sg_index); 2444 /* load how many bytes in the sg list table */ 2445 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2446 ((u32)(srb->sg_count - 2447 srb->sg_index) << 3)); 2448 } else { /* without S/G */ 2449 io_dir &= ~DMACMD_SG; 2450 DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, 2451 srb->segment_x[0].address); 2452 DC395x_write32(acb, TRM_S1040_DMA_XCNT, 2453 srb->segment_x[0].length); 2454 } 2455 /* load total transfer length (24bits) max value 16Mbyte */ 2456 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2457 srb->total_xfer_length); 2458 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2459 if (io_dir & DMACMD_DIR) { /* read */ 2460 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2461 SCMD_DMA_IN); 2462 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2463 } else { 2464 DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); 2465 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2466 SCMD_DMA_OUT); 2467 } 2468 2469 } 2470 #if DC395x_LASTPIO 2471 else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ 2472 /* 2473 * load what physical address of Scatter/Gather list table 2474 * want to be transfer 2475 */ 2476 srb->state |= SRB_DATA_XFER; 2477 /* load total transfer length (24bits) max value 16Mbyte */ 2478 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2479 srb->total_xfer_length); 2480 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2481 if (io_dir & DMACMD_DIR) { /* read */ 2482 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2483 SCMD_FIFO_IN); 2484 } else { /* write */ 2485 int ln = srb->total_xfer_length; 2486 size_t left_io = srb->total_xfer_length; 2487 2488 if (srb->dcb->sync_period & WIDE_SYNC) 2489 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2490 CFG2_WIDEFIFO); 2491 2492 while (left_io) { 2493 unsigned char *virt, *base = NULL; 2494 unsigned long flags = 0; 2495 size_t len = left_io; 2496 size_t offset = srb->request_length - left_io; 2497 2498 local_irq_save(flags); 2499 /* Again, max 4 bytes */ 2500 base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), 2501 srb->sg_count, &offset, &len); 2502 virt = base + offset; 2503 2504 left_io -= len; 2505 2506 while (len--) { 2507 if (debug_enabled(DBG_PIO)) 2508 printk(" %02x", *virt); 2509 2510 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++); 2511 2512 sg_subtract_one(srb); 2513 } 2514 2515 scsi_kunmap_atomic_sg(base); 2516 local_irq_restore(flags); 2517 } 2518 if (srb->dcb->sync_period & WIDE_SYNC) { 2519 if (ln % 2) { 2520 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); 2521 if (debug_enabled(DBG_PIO)) 2522 printk(" |00"); 2523 } 2524 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2525 } 2526 /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ 2527 if (debug_enabled(DBG_PIO)) 2528 printk("\n"); 2529 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, 2530 SCMD_FIFO_OUT); 2531 } 2532 } 2533 #endif /* DC395x_LASTPIO */ 2534 else { /* xfer pad */ 2535 u8 data = 0, data2 = 0; 2536 if (srb->sg_count) { 2537 srb->adapter_status = H_OVER_UNDER_RUN; 2538 srb->status |= OVER_RUN; 2539 } 2540 /* 2541 * KG: despite the fact that we are using 16 bits I/O ops 2542 * the SCSI FIFO is only 8 bits according to the docs 2543 * (we can set bit 1 in 0x8f to serialize FIFO access ...) 2544 */ 2545 if (dcb->sync_period & WIDE_SYNC) { 2546 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); 2547 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 2548 CFG2_WIDEFIFO); 2549 if (io_dir & DMACMD_DIR) { 2550 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2551 data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2552 } else { 2553 /* Danger, Robinson: If you find KGs 2554 * scattered over the wide disk, the driver 2555 * or chip is to blame :-( */ 2556 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2557 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); 2558 } 2559 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); 2560 } else { 2561 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2562 /* Danger, Robinson: If you find a collection of Ks on your disk 2563 * something broke :-( */ 2564 if (io_dir & DMACMD_DIR) 2565 data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2566 else 2567 DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); 2568 } 2569 srb->state |= SRB_XFERPAD; 2570 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2571 /* SCSI command */ 2572 bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; 2573 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); 2574 } 2575 } 2576 2577 2578 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2579 u16 *pscsi_status) 2580 { 2581 dprintkdbg(DBG_0, "status_phase0: (0x%p) <%02i-%i>\n", 2582 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2583 srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2584 srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ 2585 srb->state = SRB_COMPLETED; 2586 *pscsi_status = PH_BUS_FREE; /*.. initial phase */ 2587 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2588 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2589 } 2590 2591 2592 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2593 u16 *pscsi_status) 2594 { 2595 dprintkdbg(DBG_0, "status_phase1: (0x%p) <%02i-%i>\n", 2596 srb->cmd, srb->cmd->device->id, (u8)srb->cmd->device->lun); 2597 srb->state = SRB_STATUS; 2598 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2599 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); 2600 } 2601 2602 2603 /* Check if the message is complete */ 2604 static inline u8 msgin_completed(u8 * msgbuf, u32 len) 2605 { 2606 if (*msgbuf == EXTENDED_MESSAGE) { 2607 if (len < 2) 2608 return 0; 2609 if (len < msgbuf[1] + 2) 2610 return 0; 2611 } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ 2612 if (len < 2) 2613 return 0; 2614 return 1; 2615 } 2616 2617 /* reject_msg */ 2618 static inline void msgin_reject(struct AdapterCtlBlk *acb, 2619 struct ScsiReqBlk *srb) 2620 { 2621 srb->msgout_buf[0] = MESSAGE_REJECT; 2622 srb->msg_count = 1; 2623 DC395x_ENABLE_MSGOUT; 2624 srb->state &= ~SRB_MSGIN; 2625 srb->state |= SRB_MSGOUT; 2626 dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", 2627 srb->msgin_buf[0], 2628 srb->dcb->target_id, srb->dcb->target_lun); 2629 } 2630 2631 2632 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, 2633 struct DeviceCtlBlk *dcb, u8 tag) 2634 { 2635 struct ScsiReqBlk *srb = NULL; 2636 struct ScsiReqBlk *i; 2637 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) tag=%i srb=%p\n", 2638 srb->cmd, tag, srb); 2639 2640 if (!(dcb->tag_mask & (1 << tag))) 2641 dprintkl(KERN_DEBUG, 2642 "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", 2643 dcb->tag_mask, tag); 2644 2645 if (list_empty(&dcb->srb_going_list)) 2646 goto mingx0; 2647 list_for_each_entry(i, &dcb->srb_going_list, list) { 2648 if (i->tag_number == tag) { 2649 srb = i; 2650 break; 2651 } 2652 } 2653 if (!srb) 2654 goto mingx0; 2655 2656 dprintkdbg(DBG_0, "msgin_qtag: (0x%p) <%02i-%i>\n", 2657 srb->cmd, srb->dcb->target_id, srb->dcb->target_lun); 2658 if (dcb->flag & ABORT_DEV_) { 2659 /*srb->state = SRB_ABORT_SENT; */ 2660 enable_msgout_abort(acb, srb); 2661 } 2662 2663 if (!(srb->state & SRB_DISCONNECT)) 2664 goto mingx0; 2665 2666 memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); 2667 srb->state |= dcb->active_srb->state; 2668 srb->state |= SRB_DATA_XFER; 2669 dcb->active_srb = srb; 2670 /* How can we make the DORS happy? */ 2671 return srb; 2672 2673 mingx0: 2674 srb = acb->tmp_srb; 2675 srb->state = SRB_UNEXPECT_RESEL; 2676 dcb->active_srb = srb; 2677 srb->msgout_buf[0] = MSG_ABORT_TAG; 2678 srb->msg_count = 1; 2679 DC395x_ENABLE_MSGOUT; 2680 dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); 2681 return srb; 2682 } 2683 2684 2685 static inline void reprogram_regs(struct AdapterCtlBlk *acb, 2686 struct DeviceCtlBlk *dcb) 2687 { 2688 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); 2689 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); 2690 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); 2691 set_xfer_rate(acb, dcb); 2692 } 2693 2694 2695 /* set async transfer mode */ 2696 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2697 { 2698 struct DeviceCtlBlk *dcb = srb->dcb; 2699 dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", 2700 dcb->target_id, dcb->target_lun); 2701 2702 dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); 2703 dcb->sync_mode |= SYNC_NEGO_DONE; 2704 /*dcb->sync_period &= 0; */ 2705 dcb->sync_offset = 0; 2706 dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ 2707 srb->state &= ~SRB_DO_SYNC_NEGO; 2708 reprogram_regs(acb, dcb); 2709 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2710 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2711 build_wdtr(acb, dcb, srb); 2712 DC395x_ENABLE_MSGOUT; 2713 dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); 2714 } 2715 } 2716 2717 2718 /* set sync transfer mode */ 2719 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2720 { 2721 struct DeviceCtlBlk *dcb = srb->dcb; 2722 u8 bval; 2723 int fact; 2724 dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " 2725 "(%02i.%01i MHz) Offset %i\n", 2726 dcb->target_id, srb->msgin_buf[3] << 2, 2727 (250 / srb->msgin_buf[3]), 2728 ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], 2729 srb->msgin_buf[4]); 2730 2731 if (srb->msgin_buf[4] > 15) 2732 srb->msgin_buf[4] = 15; 2733 if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) 2734 dcb->sync_offset = 0; 2735 else if (dcb->sync_offset == 0) 2736 dcb->sync_offset = srb->msgin_buf[4]; 2737 if (srb->msgin_buf[4] > dcb->sync_offset) 2738 srb->msgin_buf[4] = dcb->sync_offset; 2739 else 2740 dcb->sync_offset = srb->msgin_buf[4]; 2741 bval = 0; 2742 while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] 2743 || dcb->min_nego_period > 2744 clock_period[bval])) 2745 bval++; 2746 if (srb->msgin_buf[3] < clock_period[bval]) 2747 dprintkl(KERN_INFO, 2748 "msgin_set_sync: Increase sync nego period to %ins\n", 2749 clock_period[bval] << 2); 2750 srb->msgin_buf[3] = clock_period[bval]; 2751 dcb->sync_period &= 0xf0; 2752 dcb->sync_period |= ALT_SYNC | bval; 2753 dcb->min_nego_period = srb->msgin_buf[3]; 2754 2755 if (dcb->sync_period & WIDE_SYNC) 2756 fact = 500; 2757 else 2758 fact = 250; 2759 2760 dprintkl(KERN_INFO, 2761 "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", 2762 dcb->target_id, (fact == 500) ? "Wide16" : "", 2763 dcb->min_nego_period << 2, dcb->sync_offset, 2764 (fact / dcb->min_nego_period), 2765 ((fact % dcb->min_nego_period) * 10 + 2766 dcb->min_nego_period / 2) / dcb->min_nego_period); 2767 2768 if (!(srb->state & SRB_DO_SYNC_NEGO)) { 2769 /* Reply with corrected SDTR Message */ 2770 dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", 2771 srb->msgin_buf[3] << 2, srb->msgin_buf[4]); 2772 2773 memcpy(srb->msgout_buf, srb->msgin_buf, 5); 2774 srb->msg_count = 5; 2775 DC395x_ENABLE_MSGOUT; 2776 dcb->sync_mode |= SYNC_NEGO_DONE; 2777 } else { 2778 if ((dcb->sync_mode & WIDE_NEGO_ENABLE) 2779 && !(dcb->sync_mode & WIDE_NEGO_DONE)) { 2780 build_wdtr(acb, dcb, srb); 2781 DC395x_ENABLE_MSGOUT; 2782 dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); 2783 } 2784 } 2785 srb->state &= ~SRB_DO_SYNC_NEGO; 2786 dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; 2787 2788 reprogram_regs(acb, dcb); 2789 } 2790 2791 2792 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, 2793 struct ScsiReqBlk *srb) 2794 { 2795 struct DeviceCtlBlk *dcb = srb->dcb; 2796 dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); 2797 2798 dcb->sync_period &= ~WIDE_SYNC; 2799 dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); 2800 dcb->sync_mode |= WIDE_NEGO_DONE; 2801 srb->state &= ~SRB_DO_WIDE_NEGO; 2802 reprogram_regs(acb, dcb); 2803 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2804 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2805 build_sdtr(acb, dcb, srb); 2806 DC395x_ENABLE_MSGOUT; 2807 dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); 2808 } 2809 } 2810 2811 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 2812 { 2813 struct DeviceCtlBlk *dcb = srb->dcb; 2814 u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO 2815 && acb->config & HCC_WIDE_CARD) ? 1 : 0; 2816 dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); 2817 2818 if (srb->msgin_buf[3] > wide) 2819 srb->msgin_buf[3] = wide; 2820 /* Completed */ 2821 if (!(srb->state & SRB_DO_WIDE_NEGO)) { 2822 dprintkl(KERN_DEBUG, 2823 "msgin_set_wide: Wide nego initiated <%02i>\n", 2824 dcb->target_id); 2825 memcpy(srb->msgout_buf, srb->msgin_buf, 4); 2826 srb->msg_count = 4; 2827 srb->state |= SRB_DO_WIDE_NEGO; 2828 DC395x_ENABLE_MSGOUT; 2829 } 2830 2831 dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); 2832 if (srb->msgin_buf[3] > 0) 2833 dcb->sync_period |= WIDE_SYNC; 2834 else 2835 dcb->sync_period &= ~WIDE_SYNC; 2836 srb->state &= ~SRB_DO_WIDE_NEGO; 2837 /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ 2838 dprintkdbg(DBG_1, 2839 "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", 2840 (8 << srb->msgin_buf[3]), dcb->target_id); 2841 reprogram_regs(acb, dcb); 2842 if ((dcb->sync_mode & SYNC_NEGO_ENABLE) 2843 && !(dcb->sync_mode & SYNC_NEGO_DONE)) { 2844 build_sdtr(acb, dcb, srb); 2845 DC395x_ENABLE_MSGOUT; 2846 dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); 2847 } 2848 } 2849 2850 2851 /* 2852 * extended message codes: 2853 * 2854 * code description 2855 * 2856 * 02h Reserved 2857 * 00h MODIFY DATA POINTER 2858 * 01h SYNCHRONOUS DATA TRANSFER REQUEST 2859 * 03h WIDE DATA TRANSFER REQUEST 2860 * 04h - 7Fh Reserved 2861 * 80h - FFh Vendor specific 2862 */ 2863 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2864 u16 *pscsi_status) 2865 { 2866 struct DeviceCtlBlk *dcb = acb->active_dcb; 2867 dprintkdbg(DBG_0, "msgin_phase0: (0x%p)\n", srb->cmd); 2868 2869 srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); 2870 if (msgin_completed(srb->msgin_buf, acb->msg_len)) { 2871 /* Now eval the msg */ 2872 switch (srb->msgin_buf[0]) { 2873 case DISCONNECT: 2874 srb->state = SRB_DISCONNECT; 2875 break; 2876 2877 case SIMPLE_QUEUE_TAG: 2878 case HEAD_OF_QUEUE_TAG: 2879 case ORDERED_QUEUE_TAG: 2880 srb = 2881 msgin_qtag(acb, dcb, 2882 srb->msgin_buf[1]); 2883 break; 2884 2885 case MESSAGE_REJECT: 2886 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, 2887 DO_CLRATN | DO_DATALATCH); 2888 /* A sync nego message was rejected ! */ 2889 if (srb->state & SRB_DO_SYNC_NEGO) { 2890 msgin_set_async(acb, srb); 2891 break; 2892 } 2893 /* A wide nego message was rejected ! */ 2894 if (srb->state & SRB_DO_WIDE_NEGO) { 2895 msgin_set_nowide(acb, srb); 2896 break; 2897 } 2898 enable_msgout_abort(acb, srb); 2899 /*srb->state |= SRB_ABORT_SENT */ 2900 break; 2901 2902 case EXTENDED_MESSAGE: 2903 /* SDTR */ 2904 if (srb->msgin_buf[1] == 3 2905 && srb->msgin_buf[2] == EXTENDED_SDTR) { 2906 msgin_set_sync(acb, srb); 2907 break; 2908 } 2909 /* WDTR */ 2910 if (srb->msgin_buf[1] == 2 2911 && srb->msgin_buf[2] == EXTENDED_WDTR 2912 && srb->msgin_buf[3] <= 2) { /* sanity check ... */ 2913 msgin_set_wide(acb, srb); 2914 break; 2915 } 2916 msgin_reject(acb, srb); 2917 break; 2918 2919 case MSG_IGNOREWIDE: 2920 /* Discard wide residual */ 2921 dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); 2922 break; 2923 2924 case COMMAND_COMPLETE: 2925 /* nothing has to be done */ 2926 break; 2927 2928 case SAVE_POINTERS: 2929 /* 2930 * SAVE POINTER may be ignored as we have the struct 2931 * ScsiReqBlk* associated with the scsi command. 2932 */ 2933 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2934 "SAVE POINTER rem=%i Ignore\n", 2935 srb->cmd, srb->total_xfer_length); 2936 break; 2937 2938 case RESTORE_POINTERS: 2939 dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); 2940 break; 2941 2942 case ABORT: 2943 dprintkdbg(DBG_0, "msgin_phase0: (0x%p) " 2944 "<%02i-%i> ABORT msg\n", 2945 srb->cmd, dcb->target_id, 2946 dcb->target_lun); 2947 dcb->flag |= ABORT_DEV_; 2948 enable_msgout_abort(acb, srb); 2949 break; 2950 2951 default: 2952 /* reject unknown messages */ 2953 if (srb->msgin_buf[0] & IDENTIFY_BASE) { 2954 dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); 2955 srb->msg_count = 1; 2956 srb->msgout_buf[0] = dcb->identify_msg; 2957 DC395x_ENABLE_MSGOUT; 2958 srb->state |= SRB_MSGOUT; 2959 /*break; */ 2960 } 2961 msgin_reject(acb, srb); 2962 } 2963 2964 /* Clear counter and MsgIn state */ 2965 srb->state &= ~SRB_MSGIN; 2966 acb->msg_len = 0; 2967 } 2968 *pscsi_status = PH_BUS_FREE; 2969 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ 2970 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 2971 } 2972 2973 2974 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2975 u16 *pscsi_status) 2976 { 2977 dprintkdbg(DBG_0, "msgin_phase1: (0x%p)\n", srb->cmd); 2978 clear_fifo(acb, "msgin_phase1"); 2979 DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); 2980 if (!(srb->state & SRB_MSGIN)) { 2981 srb->state &= ~SRB_DISCONNECT; 2982 srb->state |= SRB_MSGIN; 2983 } 2984 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 2985 /* SCSI command */ 2986 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); 2987 } 2988 2989 2990 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2991 u16 *pscsi_status) 2992 { 2993 } 2994 2995 2996 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 2997 u16 *pscsi_status) 2998 { 2999 } 3000 3001 3002 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) 3003 { 3004 struct DeviceCtlBlk *i; 3005 3006 /* set all lun device's period, offset */ 3007 if (dcb->identify_msg & 0x07) 3008 return; 3009 3010 if (acb->scan_devices) { 3011 current_sync_offset = dcb->sync_offset; 3012 return; 3013 } 3014 3015 list_for_each_entry(i, &acb->dcb_list, list) 3016 if (i->target_id == dcb->target_id) { 3017 i->sync_period = dcb->sync_period; 3018 i->sync_offset = dcb->sync_offset; 3019 i->sync_mode = dcb->sync_mode; 3020 i->min_nego_period = dcb->min_nego_period; 3021 } 3022 } 3023 3024 3025 static void disconnect(struct AdapterCtlBlk *acb) 3026 { 3027 struct DeviceCtlBlk *dcb = acb->active_dcb; 3028 struct ScsiReqBlk *srb; 3029 3030 if (!dcb) { 3031 dprintkl(KERN_ERR, "disconnect: No such device\n"); 3032 udelay(500); 3033 /* Suspend queue for a while */ 3034 acb->last_reset = 3035 jiffies + HZ / 2 + 3036 HZ * acb->eeprom.delay_time; 3037 clear_fifo(acb, "disconnectEx"); 3038 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3039 return; 3040 } 3041 srb = dcb->active_srb; 3042 acb->active_dcb = NULL; 3043 dprintkdbg(DBG_0, "disconnect: (0x%p)\n", srb->cmd); 3044 3045 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3046 clear_fifo(acb, "disconnect"); 3047 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); 3048 if (srb->state & SRB_UNEXPECT_RESEL) { 3049 dprintkl(KERN_ERR, 3050 "disconnect: Unexpected reselection <%02i-%i>\n", 3051 dcb->target_id, dcb->target_lun); 3052 srb->state = 0; 3053 waiting_process_next(acb); 3054 } else if (srb->state & SRB_ABORT_SENT) { 3055 dcb->flag &= ~ABORT_DEV_; 3056 acb->last_reset = jiffies + HZ / 2 + 1; 3057 dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); 3058 doing_srb_done(acb, DID_ABORT, srb->cmd, 1); 3059 waiting_process_next(acb); 3060 } else { 3061 if ((srb->state & (SRB_START_ + SRB_MSGOUT)) 3062 || !(srb-> 3063 state & (SRB_DISCONNECT + SRB_COMPLETED))) { 3064 /* 3065 * Selection time out 3066 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) 3067 */ 3068 /* Unexp. Disc / Sel Timeout */ 3069 if (srb->state != SRB_START_ 3070 && srb->state != SRB_MSGOUT) { 3071 srb->state = SRB_READY; 3072 dprintkl(KERN_DEBUG, 3073 "disconnect: (0x%p) Unexpected\n", 3074 srb->cmd); 3075 srb->target_status = SCSI_STAT_SEL_TIMEOUT; 3076 goto disc1; 3077 } else { 3078 /* Normal selection timeout */ 3079 dprintkdbg(DBG_KG, "disconnect: (0x%p) " 3080 "<%02i-%i> SelTO\n", srb->cmd, 3081 dcb->target_id, dcb->target_lun); 3082 if (srb->retry_count++ > DC395x_MAX_RETRIES 3083 || acb->scan_devices) { 3084 srb->target_status = 3085 SCSI_STAT_SEL_TIMEOUT; 3086 goto disc1; 3087 } 3088 free_tag(dcb, srb); 3089 srb_going_to_waiting_move(dcb, srb); 3090 dprintkdbg(DBG_KG, 3091 "disconnect: (0x%p) Retry\n", 3092 srb->cmd); 3093 waiting_set_timer(acb, HZ / 20); 3094 } 3095 } else if (srb->state & SRB_DISCONNECT) { 3096 u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); 3097 /* 3098 * SRB_DISCONNECT (This is what we expect!) 3099 */ 3100 if (bval & 0x40) { 3101 dprintkdbg(DBG_0, "disconnect: SCSI bus stat " 3102 " 0x%02x: ACK set! Other controllers?\n", 3103 bval); 3104 /* It could come from another initiator, therefore don't do much ! */ 3105 } else 3106 waiting_process_next(acb); 3107 } else if (srb->state & SRB_COMPLETED) { 3108 disc1: 3109 /* 3110 ** SRB_COMPLETED 3111 */ 3112 free_tag(dcb, srb); 3113 dcb->active_srb = NULL; 3114 srb->state = SRB_FREE; 3115 srb_done(acb, dcb, srb); 3116 } 3117 } 3118 } 3119 3120 3121 static void reselect(struct AdapterCtlBlk *acb) 3122 { 3123 struct DeviceCtlBlk *dcb = acb->active_dcb; 3124 struct ScsiReqBlk *srb = NULL; 3125 u16 rsel_tar_lun_id; 3126 u8 id, lun; 3127 u8 arblostflag = 0; 3128 dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); 3129 3130 clear_fifo(acb, "reselect"); 3131 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ 3132 /* Read Reselected Target ID and LUN */ 3133 rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); 3134 if (dcb) { /* Arbitration lost but Reselection win */ 3135 srb = dcb->active_srb; 3136 if (!srb) { 3137 dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " 3138 "but active_srb == NULL\n"); 3139 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3140 return; 3141 } 3142 /* Why the if ? */ 3143 if (!acb->scan_devices) { 3144 dprintkdbg(DBG_KG, "reselect: (0x%p) <%02i-%i> " 3145 "Arb lost but Resel win rsel=%i stat=0x%04x\n", 3146 srb->cmd, dcb->target_id, 3147 dcb->target_lun, rsel_tar_lun_id, 3148 DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); 3149 arblostflag = 1; 3150 /*srb->state |= SRB_DISCONNECT; */ 3151 3152 srb->state = SRB_READY; 3153 free_tag(dcb, srb); 3154 srb_going_to_waiting_move(dcb, srb); 3155 waiting_set_timer(acb, HZ / 20); 3156 3157 /* return; */ 3158 } 3159 } 3160 /* Read Reselected Target Id and LUN */ 3161 if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) 3162 dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " 3163 "Got %i!\n", rsel_tar_lun_id); 3164 id = rsel_tar_lun_id & 0xff; 3165 lun = (rsel_tar_lun_id >> 8) & 7; 3166 dcb = find_dcb(acb, id, lun); 3167 if (!dcb) { 3168 dprintkl(KERN_ERR, "reselect: From non existent device " 3169 "<%02i-%i>\n", id, lun); 3170 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3171 return; 3172 } 3173 acb->active_dcb = dcb; 3174 3175 if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) 3176 dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " 3177 "disconnection? <%02i-%i>\n", 3178 dcb->target_id, dcb->target_lun); 3179 3180 if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { 3181 srb = acb->tmp_srb; 3182 dcb->active_srb = srb; 3183 } else { 3184 /* There can be only one! */ 3185 srb = dcb->active_srb; 3186 if (!srb || !(srb->state & SRB_DISCONNECT)) { 3187 /* 3188 * abort command 3189 */ 3190 dprintkl(KERN_DEBUG, 3191 "reselect: w/o disconnected cmds <%02i-%i>\n", 3192 dcb->target_id, dcb->target_lun); 3193 srb = acb->tmp_srb; 3194 srb->state = SRB_UNEXPECT_RESEL; 3195 dcb->active_srb = srb; 3196 enable_msgout_abort(acb, srb); 3197 } else { 3198 if (dcb->flag & ABORT_DEV_) { 3199 /*srb->state = SRB_ABORT_SENT; */ 3200 enable_msgout_abort(acb, srb); 3201 } else 3202 srb->state = SRB_DATA_XFER; 3203 3204 } 3205 } 3206 srb->scsi_phase = PH_BUS_FREE; /* initial phase */ 3207 3208 /* Program HA ID, target ID, period and offset */ 3209 dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); 3210 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ 3211 DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ 3212 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ 3213 DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ 3214 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ 3215 /* SCSI command */ 3216 DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); 3217 } 3218 3219 3220 static inline u8 tagq_blacklist(char *name) 3221 { 3222 #ifndef DC395x_NO_TAGQ 3223 #if 0 3224 u8 i; 3225 for (i = 0; i < BADDEVCNT; i++) 3226 if (memcmp(name, DC395x_baddevname1[i], 28) == 0) 3227 return 1; 3228 #endif 3229 return 0; 3230 #else 3231 return 1; 3232 #endif 3233 } 3234 3235 3236 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) 3237 { 3238 /* Check for SCSI format (ANSI and Response data format) */ 3239 if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { 3240 if ((ptr->Flags & SCSI_INQ_CMDQUEUE) 3241 && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && 3242 /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ 3243 /* ((dcb->dev_type == TYPE_DISK) 3244 || (dcb->dev_type == TYPE_MOD)) && */ 3245 !tagq_blacklist(((char *)ptr) + 8)) { 3246 if (dcb->max_command == 1) 3247 dcb->max_command = 3248 dcb->acb->tag_max_num; 3249 dcb->sync_mode |= EN_TAG_QUEUEING; 3250 /*dcb->tag_mask = 0; */ 3251 } else 3252 dcb->max_command = 1; 3253 } 3254 } 3255 3256 3257 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3258 struct ScsiInqData *ptr) 3259 { 3260 u8 bval1 = ptr->DevType & SCSI_DEVTYPE; 3261 dcb->dev_type = bval1; 3262 /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ 3263 disc_tagq_set(dcb, ptr); 3264 } 3265 3266 3267 /* unmap mapped pci regions from SRB */ 3268 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) 3269 { 3270 struct scsi_cmnd *cmd = srb->cmd; 3271 enum dma_data_direction dir = cmd->sc_data_direction; 3272 3273 if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) { 3274 /* unmap DC395x SG list */ 3275 dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", 3276 srb->sg_bus_addr, SEGMENTX_LEN); 3277 pci_unmap_single(acb->dev, srb->sg_bus_addr, 3278 SEGMENTX_LEN, 3279 PCI_DMA_TODEVICE); 3280 dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", 3281 scsi_sg_count(cmd), scsi_bufflen(cmd)); 3282 /* unmap the sg segments */ 3283 scsi_dma_unmap(cmd); 3284 } 3285 } 3286 3287 3288 /* unmap mapped pci sense buffer from SRB */ 3289 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, 3290 struct ScsiReqBlk *srb) 3291 { 3292 if (!(srb->flag & AUTO_REQSENSE)) 3293 return; 3294 /* Unmap sense buffer */ 3295 dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", 3296 srb->segment_x[0].address); 3297 pci_unmap_single(acb->dev, srb->segment_x[0].address, 3298 srb->segment_x[0].length, PCI_DMA_FROMDEVICE); 3299 /* Restore SG stuff */ 3300 srb->total_xfer_length = srb->xferred; 3301 srb->segment_x[0].address = 3302 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; 3303 srb->segment_x[0].length = 3304 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; 3305 } 3306 3307 3308 /* 3309 * Complete execution of a SCSI command 3310 * Signal completion to the generic SCSI driver 3311 */ 3312 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3313 struct ScsiReqBlk *srb) 3314 { 3315 u8 tempcnt, status; 3316 struct scsi_cmnd *cmd = srb->cmd; 3317 enum dma_data_direction dir = cmd->sc_data_direction; 3318 int ckc_only = 1; 3319 3320 dprintkdbg(DBG_1, "srb_done: (0x%p) <%02i-%i>\n", srb->cmd, 3321 srb->cmd->device->id, (u8)srb->cmd->device->lun); 3322 dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", 3323 srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, 3324 scsi_sgtalbe(cmd)); 3325 status = srb->target_status; 3326 if (srb->flag & AUTO_REQSENSE) { 3327 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); 3328 pci_unmap_srb_sense(acb, srb); 3329 /* 3330 ** target status.......................... 3331 */ 3332 srb->flag &= ~AUTO_REQSENSE; 3333 srb->adapter_status = 0; 3334 srb->target_status = CHECK_CONDITION << 1; 3335 if (debug_enabled(DBG_1)) { 3336 switch (cmd->sense_buffer[2] & 0x0f) { 3337 case NOT_READY: 3338 dprintkl(KERN_DEBUG, 3339 "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3340 cmd->cmnd[0], dcb->target_id, 3341 dcb->target_lun, status, acb->scan_devices); 3342 break; 3343 case UNIT_ATTENTION: 3344 dprintkl(KERN_DEBUG, 3345 "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3346 cmd->cmnd[0], dcb->target_id, 3347 dcb->target_lun, status, acb->scan_devices); 3348 break; 3349 case ILLEGAL_REQUEST: 3350 dprintkl(KERN_DEBUG, 3351 "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3352 cmd->cmnd[0], dcb->target_id, 3353 dcb->target_lun, status, acb->scan_devices); 3354 break; 3355 case MEDIUM_ERROR: 3356 dprintkl(KERN_DEBUG, 3357 "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3358 cmd->cmnd[0], dcb->target_id, 3359 dcb->target_lun, status, acb->scan_devices); 3360 break; 3361 case HARDWARE_ERROR: 3362 dprintkl(KERN_DEBUG, 3363 "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", 3364 cmd->cmnd[0], dcb->target_id, 3365 dcb->target_lun, status, acb->scan_devices); 3366 break; 3367 } 3368 if (cmd->sense_buffer[7] >= 6) 3369 printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " 3370 "(0x%08x 0x%08x)\n", 3371 cmd->sense_buffer[2], cmd->sense_buffer[12], 3372 cmd->sense_buffer[13], 3373 *((unsigned int *)(cmd->sense_buffer + 3)), 3374 *((unsigned int *)(cmd->sense_buffer + 8))); 3375 else 3376 printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", 3377 cmd->sense_buffer[2], 3378 *((unsigned int *)(cmd->sense_buffer + 3))); 3379 } 3380 3381 if (status == (CHECK_CONDITION << 1)) { 3382 cmd->result = DID_BAD_TARGET << 16; 3383 goto ckc_e; 3384 } 3385 dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); 3386 3387 if (srb->total_xfer_length 3388 && srb->total_xfer_length >= cmd->underflow) 3389 cmd->result = 3390 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3391 srb->end_message, CHECK_CONDITION); 3392 /*SET_RES_DID(cmd->result,DID_OK) */ 3393 else 3394 cmd->result = 3395 MK_RES_LNX(DRIVER_SENSE, DID_OK, 3396 srb->end_message, CHECK_CONDITION); 3397 3398 goto ckc_e; 3399 } 3400 3401 /*************************************************************/ 3402 if (status) { 3403 /* 3404 * target status.......................... 3405 */ 3406 if (status_byte(status) == CHECK_CONDITION) { 3407 request_sense(acb, dcb, srb); 3408 return; 3409 } else if (status_byte(status) == QUEUE_FULL) { 3410 tempcnt = (u8)list_size(&dcb->srb_going_list); 3411 dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", 3412 dcb->target_id, dcb->target_lun, tempcnt); 3413 if (tempcnt > 1) 3414 tempcnt--; 3415 dcb->max_command = tempcnt; 3416 free_tag(dcb, srb); 3417 srb_going_to_waiting_move(dcb, srb); 3418 waiting_set_timer(acb, HZ / 20); 3419 srb->adapter_status = 0; 3420 srb->target_status = 0; 3421 return; 3422 } else if (status == SCSI_STAT_SEL_TIMEOUT) { 3423 srb->adapter_status = H_SEL_TIMEOUT; 3424 srb->target_status = 0; 3425 cmd->result = DID_NO_CONNECT << 16; 3426 } else { 3427 srb->adapter_status = 0; 3428 SET_RES_DID(cmd->result, DID_ERROR); 3429 SET_RES_MSG(cmd->result, srb->end_message); 3430 SET_RES_TARGET(cmd->result, status); 3431 3432 } 3433 } else { 3434 /* 3435 ** process initiator status.......................... 3436 */ 3437 status = srb->adapter_status; 3438 if (status & H_OVER_UNDER_RUN) { 3439 srb->target_status = 0; 3440 SET_RES_DID(cmd->result, DID_OK); 3441 SET_RES_MSG(cmd->result, srb->end_message); 3442 } else if (srb->status & PARITY_ERROR) { 3443 SET_RES_DID(cmd->result, DID_PARITY); 3444 SET_RES_MSG(cmd->result, srb->end_message); 3445 } else { /* No error */ 3446 3447 srb->adapter_status = 0; 3448 srb->target_status = 0; 3449 SET_RES_DID(cmd->result, DID_OK); 3450 } 3451 } 3452 3453 if (dir != PCI_DMA_NONE && scsi_sg_count(cmd)) 3454 pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd), 3455 scsi_sg_count(cmd), dir); 3456 3457 ckc_only = 0; 3458 /* Check Error Conditions */ 3459 ckc_e: 3460 3461 if (cmd->cmnd[0] == INQUIRY) { 3462 unsigned char *base = NULL; 3463 struct ScsiInqData *ptr; 3464 unsigned long flags = 0; 3465 struct scatterlist* sg = scsi_sglist(cmd); 3466 size_t offset = 0, len = sizeof(struct ScsiInqData); 3467 3468 local_irq_save(flags); 3469 base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); 3470 ptr = (struct ScsiInqData *)(base + offset); 3471 3472 if (!ckc_only && (cmd->result & RES_DID) == 0 3473 && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 3474 && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) 3475 dcb->inquiry7 = ptr->Flags; 3476 3477 /*if( srb->cmd->cmnd[0] == INQUIRY && */ 3478 /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ 3479 if ((cmd->result == (DID_OK << 16) 3480 || status_byte(cmd->result) & 3481 CHECK_CONDITION)) { 3482 if (!dcb->init_tcq_flag) { 3483 add_dev(acb, dcb, ptr); 3484 dcb->init_tcq_flag = 1; 3485 } 3486 } 3487 3488 scsi_kunmap_atomic_sg(base); 3489 local_irq_restore(flags); 3490 } 3491 3492 /* Here is the info for Doug Gilbert's sg3 ... */ 3493 scsi_set_resid(cmd, srb->total_xfer_length); 3494 /* This may be interpreted by sb. or not ... */ 3495 cmd->SCp.this_residual = srb->total_xfer_length; 3496 cmd->SCp.buffers_residual = 0; 3497 if (debug_enabled(DBG_KG)) { 3498 if (srb->total_xfer_length) 3499 dprintkdbg(DBG_KG, "srb_done: (0x%p) <%02i-%i> " 3500 "cmnd=0x%02x Missed %i bytes\n", 3501 cmd, cmd->device->id, (u8)cmd->device->lun, 3502 cmd->cmnd[0], srb->total_xfer_length); 3503 } 3504 3505 srb_going_remove(dcb, srb); 3506 /* Add to free list */ 3507 if (srb == acb->tmp_srb) 3508 dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); 3509 else { 3510 dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n", 3511 cmd, cmd->result); 3512 srb_free_insert(acb, srb); 3513 } 3514 pci_unmap_srb(acb, srb); 3515 3516 cmd->scsi_done(cmd); 3517 waiting_process_next(acb); 3518 } 3519 3520 3521 /* abort all cmds in our queues */ 3522 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, 3523 struct scsi_cmnd *cmd, u8 force) 3524 { 3525 struct DeviceCtlBlk *dcb; 3526 dprintkl(KERN_INFO, "doing_srb_done: pids "); 3527 3528 list_for_each_entry(dcb, &acb->dcb_list, list) { 3529 struct ScsiReqBlk *srb; 3530 struct ScsiReqBlk *tmp; 3531 struct scsi_cmnd *p; 3532 3533 list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { 3534 enum dma_data_direction dir; 3535 int result; 3536 3537 p = srb->cmd; 3538 dir = p->sc_data_direction; 3539 result = MK_RES(0, did_flag, 0, 0); 3540 printk("G:%p(%02i-%i) ", p, 3541 p->device->id, (u8)p->device->lun); 3542 srb_going_remove(dcb, srb); 3543 free_tag(dcb, srb); 3544 srb_free_insert(acb, srb); 3545 p->result = result; 3546 pci_unmap_srb_sense(acb, srb); 3547 pci_unmap_srb(acb, srb); 3548 if (force) { 3549 /* For new EH, we normally don't need to give commands back, 3550 * as they all complete or all time out */ 3551 p->scsi_done(p); 3552 } 3553 } 3554 if (!list_empty(&dcb->srb_going_list)) 3555 dprintkl(KERN_DEBUG, 3556 "How could the ML send cmnds to the Going queue? <%02i-%i>\n", 3557 dcb->target_id, dcb->target_lun); 3558 if (dcb->tag_mask) 3559 dprintkl(KERN_DEBUG, 3560 "tag_mask for <%02i-%i> should be empty, is %08x!\n", 3561 dcb->target_id, dcb->target_lun, 3562 dcb->tag_mask); 3563 3564 /* Waiting queue */ 3565 list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { 3566 int result; 3567 p = srb->cmd; 3568 3569 result = MK_RES(0, did_flag, 0, 0); 3570 printk("W:%p<%02i-%i>", p, p->device->id, 3571 (u8)p->device->lun); 3572 srb_waiting_remove(dcb, srb); 3573 srb_free_insert(acb, srb); 3574 p->result = result; 3575 pci_unmap_srb_sense(acb, srb); 3576 pci_unmap_srb(acb, srb); 3577 if (force) { 3578 /* For new EH, we normally don't need to give commands back, 3579 * as they all complete or all time out */ 3580 cmd->scsi_done(cmd); 3581 } 3582 } 3583 if (!list_empty(&dcb->srb_waiting_list)) 3584 dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", 3585 list_size(&dcb->srb_waiting_list), dcb->target_id, 3586 dcb->target_lun); 3587 dcb->flag &= ~ABORT_DEV_; 3588 } 3589 printk("\n"); 3590 } 3591 3592 3593 static void reset_scsi_bus(struct AdapterCtlBlk *acb) 3594 { 3595 dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); 3596 acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3597 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 3598 3599 while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) 3600 /* nothing */; 3601 } 3602 3603 3604 static void set_basic_config(struct AdapterCtlBlk *acb) 3605 { 3606 u8 bval; 3607 u16 wval; 3608 DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); 3609 if (acb->config & HCC_PARITY) 3610 bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; 3611 else 3612 bval = PHASELATCH | INITIATOR | BLOCKRST; 3613 3614 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); 3615 3616 /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ 3617 DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ 3618 /* program Host ID */ 3619 DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); 3620 /* set ansynchronous transfer */ 3621 DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); 3622 /* Turn LED control off */ 3623 wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; 3624 DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); 3625 /* DMA config */ 3626 wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; 3627 wval |= 3628 DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; 3629 DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); 3630 /* Clear pending interrupt status */ 3631 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 3632 /* Enable SCSI interrupt */ 3633 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); 3634 DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR 3635 /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ 3636 ); 3637 } 3638 3639 3640 static void scsi_reset_detect(struct AdapterCtlBlk *acb) 3641 { 3642 dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); 3643 /* delay half a second */ 3644 if (timer_pending(&acb->waiting_timer)) 3645 del_timer(&acb->waiting_timer); 3646 3647 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 3648 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 3649 /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ 3650 udelay(500); 3651 /* Maybe we locked up the bus? Then lets wait even longer ... */ 3652 acb->last_reset = 3653 jiffies + 5 * HZ / 2 + 3654 HZ * acb->eeprom.delay_time; 3655 3656 clear_fifo(acb, "scsi_reset_detect"); 3657 set_basic_config(acb); 3658 /*1.25 */ 3659 /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ 3660 3661 if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ 3662 acb->acb_flag |= RESET_DONE; 3663 } else { 3664 acb->acb_flag |= RESET_DETECT; 3665 reset_dev_param(acb); 3666 doing_srb_done(acb, DID_RESET, NULL, 1); 3667 /*DC395x_RecoverSRB( acb ); */ 3668 acb->active_dcb = NULL; 3669 acb->acb_flag = 0; 3670 waiting_process_next(acb); 3671 } 3672 } 3673 3674 3675 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, 3676 struct ScsiReqBlk *srb) 3677 { 3678 struct scsi_cmnd *cmd = srb->cmd; 3679 dprintkdbg(DBG_1, "request_sense: (0x%p) <%02i-%i>\n", 3680 cmd, cmd->device->id, (u8)cmd->device->lun); 3681 3682 srb->flag |= AUTO_REQSENSE; 3683 srb->adapter_status = 0; 3684 srb->target_status = 0; 3685 3686 /* KG: Can this prevent crap sense data ? */ 3687 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 3688 3689 /* Save some data */ 3690 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = 3691 srb->segment_x[0].address; 3692 srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = 3693 srb->segment_x[0].length; 3694 srb->xferred = srb->total_xfer_length; 3695 /* srb->segment_x : a one entry of S/G list table */ 3696 srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE; 3697 srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; 3698 /* Map sense buffer */ 3699 srb->segment_x[0].address = 3700 pci_map_single(acb->dev, cmd->sense_buffer, 3701 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE); 3702 dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", 3703 cmd->sense_buffer, srb->segment_x[0].address, 3704 SCSI_SENSE_BUFFERSIZE); 3705 srb->sg_count = 1; 3706 srb->sg_index = 0; 3707 3708 if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ 3709 dprintkl(KERN_DEBUG, 3710 "request_sense: (0x%p) failed <%02i-%i>\n", 3711 srb->cmd, dcb->target_id, dcb->target_lun); 3712 srb_going_to_waiting_move(dcb, srb); 3713 waiting_set_timer(acb, HZ / 100); 3714 } 3715 } 3716 3717 3718 /** 3719 * device_alloc - Allocate a new device instance. This create the 3720 * devices instance and sets up all the data items. The adapter 3721 * instance is required to obtain confiuration information for this 3722 * device. This does *not* add this device to the adapters device 3723 * list. 3724 * 3725 * @acb: The adapter to obtain configuration information from. 3726 * @target: The target for the new device. 3727 * @lun: The lun for the new device. 3728 * 3729 * Return the new device if successful or NULL on failure. 3730 **/ 3731 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, 3732 u8 target, u8 lun) 3733 { 3734 struct NvRamType *eeprom = &acb->eeprom; 3735 u8 period_index = eeprom->target[target].period & 0x07; 3736 struct DeviceCtlBlk *dcb; 3737 3738 dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); 3739 dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); 3740 if (!dcb) 3741 return NULL; 3742 dcb->acb = NULL; 3743 INIT_LIST_HEAD(&dcb->srb_going_list); 3744 INIT_LIST_HEAD(&dcb->srb_waiting_list); 3745 dcb->active_srb = NULL; 3746 dcb->tag_mask = 0; 3747 dcb->max_command = 1; 3748 dcb->target_id = target; 3749 dcb->target_lun = lun; 3750 dcb->dev_mode = eeprom->target[target].cfg0; 3751 #ifndef DC395x_NO_DISCONNECT 3752 dcb->identify_msg = 3753 IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); 3754 #else 3755 dcb->identify_msg = IDENTIFY(0, lun); 3756 #endif 3757 dcb->inquiry7 = 0; 3758 dcb->sync_mode = 0; 3759 dcb->min_nego_period = clock_period[period_index]; 3760 dcb->sync_period = 0; 3761 dcb->sync_offset = 0; 3762 dcb->flag = 0; 3763 3764 #ifndef DC395x_NO_WIDE 3765 if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) 3766 && (acb->config & HCC_WIDE_CARD)) 3767 dcb->sync_mode |= WIDE_NEGO_ENABLE; 3768 #endif 3769 #ifndef DC395x_NO_SYNC 3770 if (dcb->dev_mode & NTC_DO_SYNC_NEGO) 3771 if (!(lun) || current_sync_offset) 3772 dcb->sync_mode |= SYNC_NEGO_ENABLE; 3773 #endif 3774 if (dcb->target_lun != 0) { 3775 /* Copy settings */ 3776 struct DeviceCtlBlk *p; 3777 list_for_each_entry(p, &acb->dcb_list, list) 3778 if (p->target_id == dcb->target_id) 3779 break; 3780 dprintkdbg(DBG_1, 3781 "device_alloc: <%02i-%i> copy from <%02i-%i>\n", 3782 dcb->target_id, dcb->target_lun, 3783 p->target_id, p->target_lun); 3784 dcb->sync_mode = p->sync_mode; 3785 dcb->sync_period = p->sync_period; 3786 dcb->min_nego_period = p->min_nego_period; 3787 dcb->sync_offset = p->sync_offset; 3788 dcb->inquiry7 = p->inquiry7; 3789 } 3790 return dcb; 3791 } 3792 3793 3794 /** 3795 * adapter_add_device - Adds the device instance to the adaptor instance. 3796 * 3797 * @acb: The adapter device to be updated 3798 * @dcb: A newly created and initialised device instance to add. 3799 **/ 3800 static void adapter_add_device(struct AdapterCtlBlk *acb, 3801 struct DeviceCtlBlk *dcb) 3802 { 3803 /* backpointer to adapter */ 3804 dcb->acb = acb; 3805 3806 /* set run_robin to this device if it is currently empty */ 3807 if (list_empty(&acb->dcb_list)) 3808 acb->dcb_run_robin = dcb; 3809 3810 /* add device to list */ 3811 list_add_tail(&dcb->list, &acb->dcb_list); 3812 3813 /* update device maps */ 3814 acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); 3815 acb->children[dcb->target_id][dcb->target_lun] = dcb; 3816 } 3817 3818 3819 /** 3820 * adapter_remove_device - Removes the device instance from the adaptor 3821 * instance. The device instance is not check in any way or freed by this. 3822 * The caller is expected to take care of that. This will simply remove the 3823 * device from the adapters data strcutures. 3824 * 3825 * @acb: The adapter device to be updated 3826 * @dcb: A device that has previously been added to the adapter. 3827 **/ 3828 static void adapter_remove_device(struct AdapterCtlBlk *acb, 3829 struct DeviceCtlBlk *dcb) 3830 { 3831 struct DeviceCtlBlk *i; 3832 struct DeviceCtlBlk *tmp; 3833 dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", 3834 dcb->target_id, dcb->target_lun); 3835 3836 /* fix up any pointers to this device that we have in the adapter */ 3837 if (acb->active_dcb == dcb) 3838 acb->active_dcb = NULL; 3839 if (acb->dcb_run_robin == dcb) 3840 acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); 3841 3842 /* unlink from list */ 3843 list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) 3844 if (dcb == i) { 3845 list_del(&i->list); 3846 break; 3847 } 3848 3849 /* clear map and children */ 3850 acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); 3851 acb->children[dcb->target_id][dcb->target_lun] = NULL; 3852 dcb->acb = NULL; 3853 } 3854 3855 3856 /** 3857 * adapter_remove_and_free_device - Removes a single device from the adapter 3858 * and then frees the device information. 3859 * 3860 * @acb: The adapter device to be updated 3861 * @dcb: A device that has previously been added to the adapter. 3862 */ 3863 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, 3864 struct DeviceCtlBlk *dcb) 3865 { 3866 if (list_size(&dcb->srb_going_list) > 1) { 3867 dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " 3868 "Won't remove because of %i active requests.\n", 3869 dcb->target_id, dcb->target_lun, 3870 list_size(&dcb->srb_going_list)); 3871 return; 3872 } 3873 adapter_remove_device(acb, dcb); 3874 kfree(dcb); 3875 } 3876 3877 3878 /** 3879 * adapter_remove_and_free_all_devices - Removes and frees all of the 3880 * devices associated with the specified adapter. 3881 * 3882 * @acb: The adapter from which all devices should be removed. 3883 **/ 3884 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) 3885 { 3886 struct DeviceCtlBlk *dcb; 3887 struct DeviceCtlBlk *tmp; 3888 dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", 3889 list_size(&acb->dcb_list)); 3890 3891 list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) 3892 adapter_remove_and_free_device(acb, dcb); 3893 } 3894 3895 3896 /** 3897 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new 3898 * scsi device that we need to deal with. We allocate a new device and then 3899 * insert that device into the adapters device list. 3900 * 3901 * @scsi_device: The new scsi device that we need to handle. 3902 **/ 3903 static int dc395x_slave_alloc(struct scsi_device *scsi_device) 3904 { 3905 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3906 struct DeviceCtlBlk *dcb; 3907 3908 dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); 3909 if (!dcb) 3910 return -ENOMEM; 3911 adapter_add_device(acb, dcb); 3912 3913 return 0; 3914 } 3915 3916 3917 /** 3918 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a 3919 * device that is going away. 3920 * 3921 * @scsi_device: The new scsi device that we need to handle. 3922 **/ 3923 static void dc395x_slave_destroy(struct scsi_device *scsi_device) 3924 { 3925 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; 3926 struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); 3927 if (dcb) 3928 adapter_remove_and_free_device(acb, dcb); 3929 } 3930 3931 3932 3933 3934 /** 3935 * trms1040_wait_30us: wait for 30 us 3936 * 3937 * Waits for 30us (using the chip by the looks of it..) 3938 * 3939 * @io_port: base I/O address 3940 **/ 3941 static void trms1040_wait_30us(unsigned long io_port) 3942 { 3943 /* ScsiPortStallExecution(30); wait 30 us */ 3944 outb(5, io_port + TRM_S1040_GEN_TIMER); 3945 while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) 3946 /* nothing */ ; 3947 } 3948 3949 3950 /** 3951 * trms1040_write_cmd - write the secified command and address to 3952 * chip 3953 * 3954 * @io_port: base I/O address 3955 * @cmd: SB + op code (command) to send 3956 * @addr: address to send 3957 **/ 3958 static void trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) 3959 { 3960 int i; 3961 u8 send_data; 3962 3963 /* program SB + OP code */ 3964 for (i = 0; i < 3; i++, cmd <<= 1) { 3965 send_data = NVR_SELECT; 3966 if (cmd & 0x04) /* Start from bit 2 */ 3967 send_data |= NVR_BITOUT; 3968 3969 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3970 trms1040_wait_30us(io_port); 3971 outb((send_data | NVR_CLOCK), 3972 io_port + TRM_S1040_GEN_NVRAM); 3973 trms1040_wait_30us(io_port); 3974 } 3975 3976 /* send address */ 3977 for (i = 0; i < 7; i++, addr <<= 1) { 3978 send_data = NVR_SELECT; 3979 if (addr & 0x40) /* Start from bit 6 */ 3980 send_data |= NVR_BITOUT; 3981 3982 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 3983 trms1040_wait_30us(io_port); 3984 outb((send_data | NVR_CLOCK), 3985 io_port + TRM_S1040_GEN_NVRAM); 3986 trms1040_wait_30us(io_port); 3987 } 3988 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 3989 trms1040_wait_30us(io_port); 3990 } 3991 3992 3993 /** 3994 * trms1040_set_data - store a single byte in the eeprom 3995 * 3996 * Called from write all to write a single byte into the SSEEPROM 3997 * Which is done one bit at a time. 3998 * 3999 * @io_port: base I/O address 4000 * @addr: offset into EEPROM 4001 * @byte: bytes to write 4002 **/ 4003 static void trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) 4004 { 4005 int i; 4006 u8 send_data; 4007 4008 /* Send write command & address */ 4009 trms1040_write_cmd(io_port, 0x05, addr); 4010 4011 /* Write data */ 4012 for (i = 0; i < 8; i++, byte <<= 1) { 4013 send_data = NVR_SELECT; 4014 if (byte & 0x80) /* Start from bit 7 */ 4015 send_data |= NVR_BITOUT; 4016 4017 outb(send_data, io_port + TRM_S1040_GEN_NVRAM); 4018 trms1040_wait_30us(io_port); 4019 outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4020 trms1040_wait_30us(io_port); 4021 } 4022 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4023 trms1040_wait_30us(io_port); 4024 4025 /* Disable chip select */ 4026 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4027 trms1040_wait_30us(io_port); 4028 4029 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4030 trms1040_wait_30us(io_port); 4031 4032 /* Wait for write ready */ 4033 while (1) { 4034 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4035 trms1040_wait_30us(io_port); 4036 4037 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4038 trms1040_wait_30us(io_port); 4039 4040 if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) 4041 break; 4042 } 4043 4044 /* Disable chip select */ 4045 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4046 } 4047 4048 4049 /** 4050 * trms1040_write_all - write 128 bytes to the eeprom 4051 * 4052 * Write the supplied 128 bytes to the chips SEEPROM 4053 * 4054 * @eeprom: the data to write 4055 * @io_port: the base io port 4056 **/ 4057 static void trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) 4058 { 4059 u8 *b_eeprom = (u8 *)eeprom; 4060 u8 addr; 4061 4062 /* Enable SEEPROM */ 4063 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4064 io_port + TRM_S1040_GEN_CONTROL); 4065 4066 /* write enable */ 4067 trms1040_write_cmd(io_port, 0x04, 0xFF); 4068 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4069 trms1040_wait_30us(io_port); 4070 4071 /* write */ 4072 for (addr = 0; addr < 128; addr++, b_eeprom++) 4073 trms1040_set_data(io_port, addr, *b_eeprom); 4074 4075 /* write disable */ 4076 trms1040_write_cmd(io_port, 0x04, 0x00); 4077 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4078 trms1040_wait_30us(io_port); 4079 4080 /* Disable SEEPROM */ 4081 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4082 io_port + TRM_S1040_GEN_CONTROL); 4083 } 4084 4085 4086 /** 4087 * trms1040_get_data - get a single byte from the eeprom 4088 * 4089 * Called from read all to read a single byte into the SSEEPROM 4090 * Which is done one bit at a time. 4091 * 4092 * @io_port: base I/O address 4093 * @addr: offset into SEEPROM 4094 * 4095 * Returns the byte read. 4096 **/ 4097 static u8 trms1040_get_data(unsigned long io_port, u8 addr) 4098 { 4099 int i; 4100 u8 read_byte; 4101 u8 result = 0; 4102 4103 /* Send read command & address */ 4104 trms1040_write_cmd(io_port, 0x06, addr); 4105 4106 /* read data */ 4107 for (i = 0; i < 8; i++) { 4108 outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); 4109 trms1040_wait_30us(io_port); 4110 outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); 4111 4112 /* Get data bit while falling edge */ 4113 read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); 4114 result <<= 1; 4115 if (read_byte & NVR_BITIN) 4116 result |= 1; 4117 4118 trms1040_wait_30us(io_port); 4119 } 4120 4121 /* Disable chip select */ 4122 outb(0, io_port + TRM_S1040_GEN_NVRAM); 4123 return result; 4124 } 4125 4126 4127 /** 4128 * trms1040_read_all - read all bytes from the eeprom 4129 * 4130 * Read the 128 bytes from the SEEPROM. 4131 * 4132 * @eeprom: where to store the data 4133 * @io_port: the base io port 4134 **/ 4135 static void trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) 4136 { 4137 u8 *b_eeprom = (u8 *)eeprom; 4138 u8 addr; 4139 4140 /* Enable SEEPROM */ 4141 outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), 4142 io_port + TRM_S1040_GEN_CONTROL); 4143 4144 /* read details */ 4145 for (addr = 0; addr < 128; addr++, b_eeprom++) 4146 *b_eeprom = trms1040_get_data(io_port, addr); 4147 4148 /* Disable SEEPROM */ 4149 outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), 4150 io_port + TRM_S1040_GEN_CONTROL); 4151 } 4152 4153 4154 4155 /** 4156 * check_eeprom - get and check contents of the eeprom 4157 * 4158 * Read seeprom 128 bytes into the memory provider in eeprom. 4159 * Checks the checksum and if it's not correct it uses a set of default 4160 * values. 4161 * 4162 * @eeprom: caller allocated strcuture to read the eeprom data into 4163 * @io_port: io port to read from 4164 **/ 4165 static void check_eeprom(struct NvRamType *eeprom, unsigned long io_port) 4166 { 4167 u16 *w_eeprom = (u16 *)eeprom; 4168 u16 w_addr; 4169 u16 cksum; 4170 u32 d_addr; 4171 u32 *d_eeprom; 4172 4173 trms1040_read_all(eeprom, io_port); /* read eeprom */ 4174 4175 cksum = 0; 4176 for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; 4177 w_addr++, w_eeprom++) 4178 cksum += *w_eeprom; 4179 if (cksum != 0x1234) { 4180 /* 4181 * Checksum is wrong. 4182 * Load a set of defaults into the eeprom buffer 4183 */ 4184 dprintkl(KERN_WARNING, 4185 "EEProm checksum error: using default values and options.\n"); 4186 eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4187 eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4188 eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4189 eeprom->sub_sys_id[1] = 4190 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4191 eeprom->sub_class = 0x00; 4192 eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; 4193 eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); 4194 eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; 4195 eeprom->device_id[1] = 4196 (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); 4197 eeprom->reserved = 0x00; 4198 4199 for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; 4200 d_addr < 16; d_addr++, d_eeprom++) 4201 *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ 4202 4203 *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ 4204 *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ 4205 for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) 4206 *d_eeprom = 0x00; 4207 4208 /* Now load defaults (maybe set by boot/module params) */ 4209 set_safe_settings(); 4210 fix_settings(); 4211 eeprom_override(eeprom); 4212 4213 eeprom->cksum = 0x00; 4214 for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; 4215 w_addr < 63; w_addr++, w_eeprom++) 4216 cksum += *w_eeprom; 4217 4218 *w_eeprom = 0x1234 - cksum; 4219 trms1040_write_all(eeprom, io_port); 4220 eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; 4221 } else { 4222 set_safe_settings(); 4223 eeprom_index_to_delay(eeprom); 4224 eeprom_override(eeprom); 4225 } 4226 } 4227 4228 4229 /** 4230 * print_eeprom_settings - output the eeprom settings 4231 * to the kernel log so people can see what they were. 4232 * 4233 * @eeprom: The eeprom data strucutre to show details for. 4234 **/ 4235 static void print_eeprom_settings(struct NvRamType *eeprom) 4236 { 4237 dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", 4238 eeprom->scsi_id, 4239 eeprom->target[0].period, 4240 clock_speed[eeprom->target[0].period] / 10, 4241 clock_speed[eeprom->target[0].period] % 10, 4242 eeprom->target[0].cfg0); 4243 dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", 4244 eeprom->channel_cfg, eeprom->max_tag, 4245 1 << eeprom->max_tag, eeprom->delay_time); 4246 } 4247 4248 4249 /* Free SG tables */ 4250 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) 4251 { 4252 int i; 4253 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4254 4255 for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) 4256 kfree(acb->srb_array[i].segment_x); 4257 } 4258 4259 4260 /* 4261 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) 4262 * should never cross a page boundary */ 4263 static int adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) 4264 { 4265 const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) 4266 *SEGMENTX_LEN; 4267 int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; 4268 const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; 4269 int srb_idx = 0; 4270 unsigned i = 0; 4271 struct SGentry *uninitialized_var(ptr); 4272 4273 for (i = 0; i < DC395x_MAX_SRB_CNT; i++) 4274 acb->srb_array[i].segment_x = NULL; 4275 4276 dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); 4277 while (pages--) { 4278 ptr = kmalloc(PAGE_SIZE, GFP_KERNEL); 4279 if (!ptr) { 4280 adapter_sg_tables_free(acb); 4281 return 1; 4282 } 4283 dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", 4284 PAGE_SIZE, ptr, srb_idx); 4285 i = 0; 4286 while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) 4287 acb->srb_array[srb_idx++].segment_x = 4288 ptr + (i++ * DC395x_MAX_SG_LISTENTRY); 4289 } 4290 if (i < srbs_per_page) 4291 acb->srb.segment_x = 4292 ptr + (i * DC395x_MAX_SG_LISTENTRY); 4293 else 4294 dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); 4295 return 0; 4296 } 4297 4298 4299 4300 /** 4301 * adapter_print_config - print adapter connection and termination 4302 * config 4303 * 4304 * The io port in the adapter needs to have been set before calling 4305 * this function. 4306 * 4307 * @acb: The adapter to print the information for. 4308 **/ 4309 static void adapter_print_config(struct AdapterCtlBlk *acb) 4310 { 4311 u8 bval; 4312 4313 bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); 4314 dprintkl(KERN_INFO, "%sConnectors: ", 4315 ((bval & WIDESCSI) ? "(Wide) " : "")); 4316 if (!(bval & CON5068)) 4317 printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); 4318 if (!(bval & CON68)) 4319 printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); 4320 if (!(bval & CON50)) 4321 printk("int50 "); 4322 if ((bval & (CON5068 | CON50 | CON68)) == 4323 0 /*(CON5068 | CON50 | CON68) */ ) 4324 printk(" Oops! (All 3?) "); 4325 bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); 4326 printk(" Termination: "); 4327 if (bval & DIS_TERM) 4328 printk("Disabled\n"); 4329 else { 4330 if (bval & AUTOTERM) 4331 printk("Auto "); 4332 if (bval & LOW8TERM) 4333 printk("Low "); 4334 if (bval & UP8TERM) 4335 printk("High "); 4336 printk("\n"); 4337 } 4338 } 4339 4340 4341 /** 4342 * adapter_init_params - Initialize the various parameters in the 4343 * adapter structure. Note that the pointer to the scsi_host is set 4344 * early (when this instance is created) and the io_port and irq 4345 * values are set later after they have been reserved. This just gets 4346 * everything set to a good starting position. 4347 * 4348 * The eeprom structure in the adapter needs to have been set before 4349 * calling this function. 4350 * 4351 * @acb: The adapter to initialize. 4352 **/ 4353 static void adapter_init_params(struct AdapterCtlBlk *acb) 4354 { 4355 struct NvRamType *eeprom = &acb->eeprom; 4356 int i; 4357 4358 /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ 4359 /* NOTE: acb->io_port_base is set at port registration time */ 4360 /* NOTE: acb->io_port_len is set at port registration time */ 4361 4362 INIT_LIST_HEAD(&acb->dcb_list); 4363 acb->dcb_run_robin = NULL; 4364 acb->active_dcb = NULL; 4365 4366 INIT_LIST_HEAD(&acb->srb_free_list); 4367 /* temp SRB for Q tag used or abort command used */ 4368 acb->tmp_srb = &acb->srb; 4369 init_timer(&acb->waiting_timer); 4370 init_timer(&acb->selto_timer); 4371 4372 acb->srb_count = DC395x_MAX_SRB_CNT; 4373 4374 acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ 4375 /* NOTE: acb->irq_level is set at IRQ registration time */ 4376 4377 acb->tag_max_num = 1 << eeprom->max_tag; 4378 if (acb->tag_max_num > 30) 4379 acb->tag_max_num = 30; 4380 4381 acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ 4382 acb->gmode2 = eeprom->channel_cfg; 4383 acb->config = 0; /* NOTE: actually set in adapter_init_chip */ 4384 4385 if (eeprom->channel_cfg & NAC_SCANLUN) 4386 acb->lun_chk = 1; 4387 acb->scan_devices = 1; 4388 4389 acb->scsi_host->this_id = eeprom->scsi_id; 4390 acb->hostid_bit = (1 << acb->scsi_host->this_id); 4391 4392 for (i = 0; i < DC395x_MAX_SCSI_ID; i++) 4393 acb->dcb_map[i] = 0; 4394 4395 acb->msg_len = 0; 4396 4397 /* link static array of srbs into the srb free list */ 4398 for (i = 0; i < acb->srb_count - 1; i++) 4399 srb_free_insert(acb, &acb->srb_array[i]); 4400 } 4401 4402 4403 /** 4404 * adapter_init_host - Initialize the scsi host instance based on 4405 * values that we have already stored in the adapter instance. There's 4406 * some mention that a lot of these are deprecated, so we won't use 4407 * them (we'll use the ones in the adapter instance) but we'll fill 4408 * them in in case something else needs them. 4409 * 4410 * The eeprom structure, irq and io ports in the adapter need to have 4411 * been set before calling this function. 4412 * 4413 * @host: The scsi host instance to fill in the values for. 4414 **/ 4415 static void adapter_init_scsi_host(struct Scsi_Host *host) 4416 { 4417 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4418 struct NvRamType *eeprom = &acb->eeprom; 4419 4420 host->max_cmd_len = 24; 4421 host->can_queue = DC395x_MAX_CMD_QUEUE; 4422 host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; 4423 host->this_id = (int)eeprom->scsi_id; 4424 host->io_port = acb->io_port_base; 4425 host->n_io_port = acb->io_port_len; 4426 host->dma_channel = -1; 4427 host->unique_id = acb->io_port_base; 4428 host->irq = acb->irq_level; 4429 acb->last_reset = jiffies; 4430 4431 host->max_id = 16; 4432 if (host->max_id - 1 == eeprom->scsi_id) 4433 host->max_id--; 4434 4435 if (eeprom->channel_cfg & NAC_SCANLUN) 4436 host->max_lun = 8; 4437 else 4438 host->max_lun = 1; 4439 } 4440 4441 4442 /** 4443 * adapter_init_chip - Get the chip into a know state and figure out 4444 * some of the settings that apply to this adapter. 4445 * 4446 * The io port in the adapter needs to have been set before calling 4447 * this function. The config will be configured correctly on return. 4448 * 4449 * @acb: The adapter which we are to init. 4450 **/ 4451 static void adapter_init_chip(struct AdapterCtlBlk *acb) 4452 { 4453 struct NvRamType *eeprom = &acb->eeprom; 4454 4455 /* Mask all the interrupt */ 4456 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); 4457 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); 4458 4459 /* Reset SCSI module */ 4460 DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); 4461 4462 /* Reset PCI/DMA module */ 4463 DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); 4464 udelay(20); 4465 4466 /* program configuration 0 */ 4467 acb->config = HCC_AUTOTERM | HCC_PARITY; 4468 if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) 4469 acb->config |= HCC_WIDE_CARD; 4470 4471 if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) 4472 acb->config |= HCC_SCSI_RESET; 4473 4474 if (acb->config & HCC_SCSI_RESET) { 4475 dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); 4476 DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); 4477 4478 /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ 4479 /*spin_unlock_irq (&io_request_lock); */ 4480 udelay(500); 4481 4482 acb->last_reset = 4483 jiffies + HZ / 2 + 4484 HZ * acb->eeprom.delay_time; 4485 4486 /*spin_lock_irq (&io_request_lock); */ 4487 } 4488 } 4489 4490 4491 /** 4492 * init_adapter - Grab the resource for the card, setup the adapter 4493 * information, set the card into a known state, create the various 4494 * tables etc etc. This basically gets all adapter information all up 4495 * to date, initialised and gets the chip in sync with it. 4496 * 4497 * @host: This hosts adapter structure 4498 * @io_port: The base I/O port 4499 * @irq: IRQ 4500 * 4501 * Returns 0 if the initialization succeeds, any other value on 4502 * failure. 4503 **/ 4504 static int adapter_init(struct AdapterCtlBlk *acb, unsigned long io_port, 4505 u32 io_port_len, unsigned int irq) 4506 { 4507 if (!request_region(io_port, io_port_len, DC395X_NAME)) { 4508 dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); 4509 goto failed; 4510 } 4511 /* store port base to indicate we have registered it */ 4512 acb->io_port_base = io_port; 4513 acb->io_port_len = io_port_len; 4514 4515 if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) { 4516 /* release the region we just claimed */ 4517 dprintkl(KERN_INFO, "Failed to register IRQ\n"); 4518 goto failed; 4519 } 4520 /* store irq to indicate we have registered it */ 4521 acb->irq_level = irq; 4522 4523 /* get eeprom configuration information and command line settings etc */ 4524 check_eeprom(&acb->eeprom, io_port); 4525 print_eeprom_settings(&acb->eeprom); 4526 4527 /* setup adapter control block */ 4528 adapter_init_params(acb); 4529 4530 /* display card connectors/termination settings */ 4531 adapter_print_config(acb); 4532 4533 if (adapter_sg_tables_alloc(acb)) { 4534 dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); 4535 goto failed; 4536 } 4537 adapter_init_scsi_host(acb->scsi_host); 4538 adapter_init_chip(acb); 4539 set_basic_config(acb); 4540 4541 dprintkdbg(DBG_0, 4542 "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " 4543 "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", 4544 acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), 4545 sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); 4546 return 0; 4547 4548 failed: 4549 if (acb->irq_level) 4550 free_irq(acb->irq_level, acb); 4551 if (acb->io_port_base) 4552 release_region(acb->io_port_base, acb->io_port_len); 4553 adapter_sg_tables_free(acb); 4554 4555 return 1; 4556 } 4557 4558 4559 /** 4560 * adapter_uninit_chip - cleanly shut down the scsi controller chip, 4561 * stopping all operations and disabling interrupt generation on the 4562 * card. 4563 * 4564 * @acb: The adapter which we are to shutdown. 4565 **/ 4566 static void adapter_uninit_chip(struct AdapterCtlBlk *acb) 4567 { 4568 /* disable interrupts */ 4569 DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); 4570 DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); 4571 4572 /* reset the scsi bus */ 4573 if (acb->config & HCC_SCSI_RESET) 4574 reset_scsi_bus(acb); 4575 4576 /* clear any pending interrupt state */ 4577 DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); 4578 } 4579 4580 4581 4582 /** 4583 * adapter_uninit - Shut down the chip and release any resources that 4584 * we had allocated. Once this returns the adapter should not be used 4585 * anymore. 4586 * 4587 * @acb: The adapter which we are to un-initialize. 4588 **/ 4589 static void adapter_uninit(struct AdapterCtlBlk *acb) 4590 { 4591 unsigned long flags; 4592 DC395x_LOCK_IO(acb->scsi_host, flags); 4593 4594 /* remove timers */ 4595 if (timer_pending(&acb->waiting_timer)) 4596 del_timer(&acb->waiting_timer); 4597 if (timer_pending(&acb->selto_timer)) 4598 del_timer(&acb->selto_timer); 4599 4600 adapter_uninit_chip(acb); 4601 adapter_remove_and_free_all_devices(acb); 4602 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4603 4604 if (acb->irq_level) 4605 free_irq(acb->irq_level, acb); 4606 if (acb->io_port_base) 4607 release_region(acb->io_port_base, acb->io_port_len); 4608 4609 adapter_sg_tables_free(acb); 4610 } 4611 4612 4613 #undef SPRINTF 4614 #define SPRINTF(args...) seq_printf(m,##args) 4615 4616 #undef YESNO 4617 #define YESNO(YN) \ 4618 if (YN) SPRINTF(" Yes ");\ 4619 else SPRINTF(" No ") 4620 4621 static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host) 4622 { 4623 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; 4624 int spd, spd1; 4625 struct DeviceCtlBlk *dcb; 4626 unsigned long flags; 4627 int dev; 4628 4629 SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); 4630 SPRINTF(" Driver Version " DC395X_VERSION "\n"); 4631 4632 DC395x_LOCK_IO(acb->scsi_host, flags); 4633 4634 SPRINTF("SCSI Host Nr %i, ", host->host_no); 4635 SPRINTF("DC395U/UW/F DC315/U %s\n", 4636 (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); 4637 SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); 4638 SPRINTF("irq_level 0x%04x, ", acb->irq_level); 4639 SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); 4640 4641 SPRINTF("MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun); 4642 SPRINTF("AdapterID %i\n", host->this_id); 4643 4644 SPRINTF("tag_max_num %i", acb->tag_max_num); 4645 /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ 4646 SPRINTF(", FilterCfg 0x%02x", 4647 DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); 4648 SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); 4649 /*SPRINTF("\n"); */ 4650 4651 SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); 4652 SPRINTF 4653 ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", 4654 acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], 4655 acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], 4656 acb->dcb_map[6], acb->dcb_map[7]); 4657 SPRINTF 4658 (" %02x %02x %02x %02x %02x %02x %02x %02x\n", 4659 acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], 4660 acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], 4661 acb->dcb_map[14], acb->dcb_map[15]); 4662 4663 SPRINTF 4664 ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); 4665 4666 dev = 0; 4667 list_for_each_entry(dcb, &acb->dcb_list, list) { 4668 int nego_period; 4669 SPRINTF("%02i %02i %02i ", dev, dcb->target_id, 4670 dcb->target_lun); 4671 YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); 4672 YESNO(dcb->sync_offset); 4673 YESNO(dcb->sync_period & WIDE_SYNC); 4674 YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); 4675 YESNO(dcb->dev_mode & NTC_DO_SEND_START); 4676 YESNO(dcb->sync_mode & EN_TAG_QUEUEING); 4677 nego_period = clock_period[dcb->sync_period & 0x07] << 2; 4678 if (dcb->sync_offset) 4679 SPRINTF(" %03i ns ", nego_period); 4680 else 4681 SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); 4682 4683 if (dcb->sync_offset & 0x0f) { 4684 spd = 1000 / (nego_period); 4685 spd1 = 1000 % (nego_period); 4686 spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); 4687 SPRINTF(" %2i.%1i M %02i ", spd, spd1, 4688 (dcb->sync_offset & 0x0f)); 4689 } else 4690 SPRINTF(" "); 4691 4692 /* Add more info ... */ 4693 SPRINTF(" %02i\n", dcb->max_command); 4694 dev++; 4695 } 4696 4697 if (timer_pending(&acb->waiting_timer)) 4698 SPRINTF("Waiting queue timer running\n"); 4699 else 4700 SPRINTF("\n"); 4701 4702 list_for_each_entry(dcb, &acb->dcb_list, list) { 4703 struct ScsiReqBlk *srb; 4704 if (!list_empty(&dcb->srb_waiting_list)) 4705 SPRINTF("DCB (%02i-%i): Waiting: %i:", 4706 dcb->target_id, dcb->target_lun, 4707 list_size(&dcb->srb_waiting_list)); 4708 list_for_each_entry(srb, &dcb->srb_waiting_list, list) 4709 SPRINTF(" %p", srb->cmd); 4710 if (!list_empty(&dcb->srb_going_list)) 4711 SPRINTF("\nDCB (%02i-%i): Going : %i:", 4712 dcb->target_id, dcb->target_lun, 4713 list_size(&dcb->srb_going_list)); 4714 list_for_each_entry(srb, &dcb->srb_going_list, list) 4715 SPRINTF(" %p", srb->cmd); 4716 if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) 4717 SPRINTF("\n"); 4718 } 4719 4720 if (debug_enabled(DBG_1)) { 4721 SPRINTF("DCB list for ACB %p:\n", acb); 4722 list_for_each_entry(dcb, &acb->dcb_list, list) { 4723 SPRINTF("%p -> ", dcb); 4724 } 4725 SPRINTF("END\n"); 4726 } 4727 4728 DC395x_UNLOCK_IO(acb->scsi_host, flags); 4729 return 0; 4730 } 4731 4732 4733 static struct scsi_host_template dc395x_driver_template = { 4734 .module = THIS_MODULE, 4735 .proc_name = DC395X_NAME, 4736 .show_info = dc395x_show_info, 4737 .name = DC395X_BANNER " " DC395X_VERSION, 4738 .queuecommand = dc395x_queue_command, 4739 .bios_param = dc395x_bios_param, 4740 .slave_alloc = dc395x_slave_alloc, 4741 .slave_destroy = dc395x_slave_destroy, 4742 .can_queue = DC395x_MAX_CAN_QUEUE, 4743 .this_id = 7, 4744 .sg_tablesize = DC395x_MAX_SG_TABLESIZE, 4745 .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, 4746 .eh_abort_handler = dc395x_eh_abort, 4747 .eh_bus_reset_handler = dc395x_eh_bus_reset, 4748 .use_clustering = DISABLE_CLUSTERING, 4749 }; 4750 4751 4752 /** 4753 * banner_display - Display banner on first instance of driver 4754 * initialized. 4755 **/ 4756 static void banner_display(void) 4757 { 4758 static int banner_done = 0; 4759 if (!banner_done) 4760 { 4761 dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); 4762 banner_done = 1; 4763 } 4764 } 4765 4766 4767 /** 4768 * dc395x_init_one - Initialise a single instance of the adapter. 4769 * 4770 * The PCI layer will call this once for each instance of the adapter 4771 * that it finds in the system. The pci_dev strcuture indicates which 4772 * instance we are being called from. 4773 * 4774 * @dev: The PCI device to initialize. 4775 * @id: Looks like a pointer to the entry in our pci device table 4776 * that was actually matched by the PCI subsystem. 4777 * 4778 * Returns 0 on success, or an error code (-ve) on failure. 4779 **/ 4780 static int dc395x_init_one(struct pci_dev *dev, const struct pci_device_id *id) 4781 { 4782 struct Scsi_Host *scsi_host = NULL; 4783 struct AdapterCtlBlk *acb = NULL; 4784 unsigned long io_port_base; 4785 unsigned int io_port_len; 4786 unsigned int irq; 4787 4788 dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); 4789 banner_display(); 4790 4791 if (pci_enable_device(dev)) 4792 { 4793 dprintkl(KERN_INFO, "PCI Enable device failed.\n"); 4794 return -ENODEV; 4795 } 4796 io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; 4797 io_port_len = pci_resource_len(dev, 0); 4798 irq = dev->irq; 4799 dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); 4800 4801 /* allocate scsi host information (includes out adapter) */ 4802 scsi_host = scsi_host_alloc(&dc395x_driver_template, 4803 sizeof(struct AdapterCtlBlk)); 4804 if (!scsi_host) { 4805 dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); 4806 goto fail; 4807 } 4808 acb = (struct AdapterCtlBlk*)scsi_host->hostdata; 4809 acb->scsi_host = scsi_host; 4810 acb->dev = dev; 4811 4812 /* initialise the adapter and everything we need */ 4813 if (adapter_init(acb, io_port_base, io_port_len, irq)) { 4814 dprintkl(KERN_INFO, "adapter init failed\n"); 4815 goto fail; 4816 } 4817 4818 pci_set_master(dev); 4819 4820 /* get the scsi mid level to scan for new devices on the bus */ 4821 if (scsi_add_host(scsi_host, &dev->dev)) { 4822 dprintkl(KERN_ERR, "scsi_add_host failed\n"); 4823 goto fail; 4824 } 4825 pci_set_drvdata(dev, scsi_host); 4826 scsi_scan_host(scsi_host); 4827 4828 return 0; 4829 4830 fail: 4831 if (acb != NULL) 4832 adapter_uninit(acb); 4833 if (scsi_host != NULL) 4834 scsi_host_put(scsi_host); 4835 pci_disable_device(dev); 4836 return -ENODEV; 4837 } 4838 4839 4840 /** 4841 * dc395x_remove_one - Called to remove a single instance of the 4842 * adapter. 4843 * 4844 * @dev: The PCI device to initialize. 4845 **/ 4846 static void dc395x_remove_one(struct pci_dev *dev) 4847 { 4848 struct Scsi_Host *scsi_host = pci_get_drvdata(dev); 4849 struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); 4850 4851 dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); 4852 4853 scsi_remove_host(scsi_host); 4854 adapter_uninit(acb); 4855 pci_disable_device(dev); 4856 scsi_host_put(scsi_host); 4857 } 4858 4859 4860 static struct pci_device_id dc395x_pci_table[] = { 4861 { 4862 .vendor = PCI_VENDOR_ID_TEKRAM, 4863 .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, 4864 .subvendor = PCI_ANY_ID, 4865 .subdevice = PCI_ANY_ID, 4866 }, 4867 {} /* Terminating entry */ 4868 }; 4869 MODULE_DEVICE_TABLE(pci, dc395x_pci_table); 4870 4871 4872 static struct pci_driver dc395x_driver = { 4873 .name = DC395X_NAME, 4874 .id_table = dc395x_pci_table, 4875 .probe = dc395x_init_one, 4876 .remove = dc395x_remove_one, 4877 }; 4878 4879 4880 /** 4881 * dc395x_module_init - Module initialization function 4882 * 4883 * Used by both module and built-in driver to initialise this driver. 4884 **/ 4885 static int __init dc395x_module_init(void) 4886 { 4887 return pci_register_driver(&dc395x_driver); 4888 } 4889 4890 4891 /** 4892 * dc395x_module_exit - Module cleanup function. 4893 **/ 4894 static void __exit dc395x_module_exit(void) 4895 { 4896 pci_unregister_driver(&dc395x_driver); 4897 } 4898 4899 4900 module_init(dc395x_module_init); 4901 module_exit(dc395x_module_exit); 4902 4903 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); 4904 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); 4905 MODULE_LICENSE("GPL"); 4906