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