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