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