1 /* -*- mode: c; c-basic-offset: 8 -*- */ 2 3 /* Driver for 53c700 and 53c700-66 chips from NCR and Symbios 4 * 5 * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com 6 */ 7 8 #ifndef _53C700_H 9 #define _53C700_H 10 11 #include <linux/interrupt.h> 12 #include <asm/io.h> 13 14 #include <scsi/scsi_device.h> 15 #include <scsi/scsi_cmnd.h> 16 17 /* Turn on for general debugging---too verbose for normal use */ 18 #undef NCR_700_DEBUG 19 /* Debug the tag queues, checking hash queue allocation and deallocation 20 * and search for duplicate tags */ 21 #undef NCR_700_TAG_DEBUG 22 23 #ifdef NCR_700_DEBUG 24 #define DEBUG(x) printk x 25 #define DDEBUG(prefix, sdev, fmt, a...) \ 26 sdev_printk(prefix, sdev, fmt, ##a) 27 #define CDEBUG(prefix, scmd, fmt, a...) \ 28 scmd_printk(prefix, scmd, fmt, ##a) 29 #else 30 #define DEBUG(x) do {} while (0) 31 #define DDEBUG(prefix, scmd, fmt, a...) do {} while (0) 32 #define CDEBUG(prefix, scmd, fmt, a...) do {} while (0) 33 #endif 34 35 /* The number of available command slots */ 36 #define NCR_700_COMMAND_SLOTS_PER_HOST 64 37 /* The maximum number of Scatter Gathers we allow */ 38 #define NCR_700_SG_SEGMENTS 32 39 /* The maximum number of luns (make this of the form 2^n) */ 40 #define NCR_700_MAX_LUNS 32 41 #define NCR_700_LUN_MASK (NCR_700_MAX_LUNS - 1) 42 /* Maximum number of tags the driver ever allows per device */ 43 #define NCR_700_MAX_TAGS 16 44 /* Tag depth the driver starts out with (can be altered in sysfs) */ 45 #define NCR_700_DEFAULT_TAGS 4 46 /* This is the default number of commands per LUN in the untagged case. 47 * two is a good value because it means we can have one command active and 48 * one command fully prepared and waiting 49 */ 50 #define NCR_700_CMD_PER_LUN 2 51 /* magic byte identifying an internally generated REQUEST_SENSE command */ 52 #define NCR_700_INTERNAL_SENSE_MAGIC 0x42 53 54 struct NCR_700_Host_Parameters; 55 56 /* These are the externally used routines */ 57 struct Scsi_Host *NCR_700_detect(struct scsi_host_template *, 58 struct NCR_700_Host_Parameters *, struct device *); 59 int NCR_700_release(struct Scsi_Host *host); 60 irqreturn_t NCR_700_intr(int, void *); 61 62 63 enum NCR_700_Host_State { 64 NCR_700_HOST_BUSY, 65 NCR_700_HOST_FREE, 66 }; 67 68 struct NCR_700_SG_List { 69 /* The following is a script fragment to move the buffer onto the 70 * bus and then link the next fragment or return */ 71 #define SCRIPT_MOVE_DATA_IN 0x09000000 72 #define SCRIPT_MOVE_DATA_OUT 0x08000000 73 __u32 ins; 74 __u32 pAddr; 75 #define SCRIPT_NOP 0x80000000 76 #define SCRIPT_RETURN 0x90080000 77 }; 78 79 struct NCR_700_Device_Parameters { 80 /* space for creating a request sense command. Really, except 81 * for the annoying SCSI-2 requirement for LUN information in 82 * cmnd[1], this could be in static storage */ 83 unsigned char cmnd[MAX_COMMAND_SIZE]; 84 __u8 depth; 85 struct scsi_cmnd *current_cmnd; /* currently active command */ 86 }; 87 88 89 /* The SYNC negotiation sequence looks like: 90 * 91 * If DEV_NEGOTIATED_SYNC not set, tack and SDTR message on to the 92 * initial identify for the device and set DEV_BEGIN_SYNC_NEGOTATION 93 * If we get an SDTR reply, work out the SXFER parameters, squirrel 94 * them away here, clear DEV_BEGIN_SYNC_NEGOTIATION and set 95 * DEV_NEGOTIATED_SYNC. If we get a REJECT msg, squirrel 96 * 97 * 98 * 0:7 SXFER_REG negotiated value for this device 99 * 8:15 Current queue depth 100 * 16 negotiated SYNC flag 101 * 17 begin SYNC negotiation flag 102 * 18 device supports tag queueing */ 103 #define NCR_700_DEV_NEGOTIATED_SYNC (1<<16) 104 #define NCR_700_DEV_BEGIN_SYNC_NEGOTIATION (1<<17) 105 #define NCR_700_DEV_PRINT_SYNC_NEGOTIATION (1<<19) 106 107 static inline char *NCR_700_get_sense_cmnd(struct scsi_device *SDp) 108 { 109 struct NCR_700_Device_Parameters *hostdata = SDp->hostdata; 110 111 return hostdata->cmnd; 112 } 113 114 static inline void 115 NCR_700_set_depth(struct scsi_device *SDp, __u8 depth) 116 { 117 struct NCR_700_Device_Parameters *hostdata = SDp->hostdata; 118 119 hostdata->depth = depth; 120 } 121 static inline __u8 122 NCR_700_get_depth(struct scsi_device *SDp) 123 { 124 struct NCR_700_Device_Parameters *hostdata = SDp->hostdata; 125 126 return hostdata->depth; 127 } 128 static inline int 129 NCR_700_is_flag_set(struct scsi_device *SDp, __u32 flag) 130 { 131 return (spi_flags(SDp->sdev_target) & flag) == flag; 132 } 133 static inline int 134 NCR_700_is_flag_clear(struct scsi_device *SDp, __u32 flag) 135 { 136 return (spi_flags(SDp->sdev_target) & flag) == 0; 137 } 138 static inline void 139 NCR_700_set_flag(struct scsi_device *SDp, __u32 flag) 140 { 141 spi_flags(SDp->sdev_target) |= flag; 142 } 143 static inline void 144 NCR_700_clear_flag(struct scsi_device *SDp, __u32 flag) 145 { 146 spi_flags(SDp->sdev_target) &= ~flag; 147 } 148 149 enum NCR_700_tag_neg_state { 150 NCR_700_START_TAG_NEGOTIATION = 0, 151 NCR_700_DURING_TAG_NEGOTIATION = 1, 152 NCR_700_FINISHED_TAG_NEGOTIATION = 2, 153 }; 154 155 static inline enum NCR_700_tag_neg_state 156 NCR_700_get_tag_neg_state(struct scsi_device *SDp) 157 { 158 return (enum NCR_700_tag_neg_state)((spi_flags(SDp->sdev_target)>>20) & 0x3); 159 } 160 161 static inline void 162 NCR_700_set_tag_neg_state(struct scsi_device *SDp, 163 enum NCR_700_tag_neg_state state) 164 { 165 /* clear the slot */ 166 spi_flags(SDp->sdev_target) &= ~(0x3 << 20); 167 spi_flags(SDp->sdev_target) |= ((__u32)state) << 20; 168 } 169 170 struct NCR_700_command_slot { 171 struct NCR_700_SG_List SG[NCR_700_SG_SEGMENTS+1]; 172 struct NCR_700_SG_List *pSG; 173 #define NCR_700_SLOT_MASK 0xFC 174 #define NCR_700_SLOT_MAGIC 0xb8 175 #define NCR_700_SLOT_FREE (0|NCR_700_SLOT_MAGIC) /* slot may be used */ 176 #define NCR_700_SLOT_BUSY (1|NCR_700_SLOT_MAGIC) /* slot has command active on HA */ 177 #define NCR_700_SLOT_QUEUED (2|NCR_700_SLOT_MAGIC) /* slot has command to be made active on HA */ 178 __u8 state; 179 #define NCR_700_FLAG_AUTOSENSE 0x01 180 __u8 flags; 181 __u8 pad1[2]; /* Needed for m68k where min alignment is 2 bytes */ 182 int tag; 183 __u32 resume_offset; 184 struct scsi_cmnd *cmnd; 185 /* The pci_mapped address of the actual command in cmnd */ 186 dma_addr_t pCmd; 187 __u32 temp; 188 /* if this command is a pci_single mapping, holds the dma address 189 * for later unmapping in the done routine */ 190 dma_addr_t dma_handle; 191 /* historical remnant, now used to link free commands */ 192 struct NCR_700_command_slot *ITL_forw; 193 }; 194 195 struct NCR_700_Host_Parameters { 196 /* These must be filled in by the calling driver */ 197 int clock; /* board clock speed in MHz */ 198 void __iomem *base; /* the base for the port (copied to host) */ 199 struct device *dev; 200 __u32 dmode_extra; /* adjustable bus settings */ 201 __u32 dcntl_extra; /* adjustable bus settings */ 202 __u32 ctest7_extra; /* adjustable bus settings */ 203 __u32 differential:1; /* if we are differential */ 204 #ifdef CONFIG_53C700_LE_ON_BE 205 /* This option is for HP only. Set it if your chip is wired for 206 * little endian on this platform (which is big endian) */ 207 __u32 force_le_on_be:1; 208 #endif 209 __u32 chip710:1; /* set if really a 710 not 700 */ 210 __u32 burst_length:4; /* set to 0 to disable 710 bursting */ 211 212 /* NOTHING BELOW HERE NEEDS ALTERING */ 213 __u32 fast:1; /* if we can alter the SCSI bus clock 214 speed (so can negiotiate sync) */ 215 int sync_clock; /* The speed of the SYNC core */ 216 217 __u32 *script; /* pointer to script location */ 218 __u32 pScript; /* physical mem addr of script */ 219 220 enum NCR_700_Host_State state; /* protected by state lock */ 221 struct scsi_cmnd *cmd; 222 /* Note: pScript contains the single consistent block of 223 * memory. All the msgin, msgout and status are allocated in 224 * this memory too (at separate cache lines). TOTAL_MEM_SIZE 225 * represents the total size of this area */ 226 #define MSG_ARRAY_SIZE 8 227 #define MSGOUT_OFFSET (L1_CACHE_ALIGN(sizeof(SCRIPT))) 228 __u8 *msgout; 229 #define MSGIN_OFFSET (MSGOUT_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE)) 230 __u8 *msgin; 231 #define STATUS_OFFSET (MSGIN_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE)) 232 __u8 *status; 233 #define SLOTS_OFFSET (STATUS_OFFSET + L1_CACHE_ALIGN(MSG_ARRAY_SIZE)) 234 struct NCR_700_command_slot *slots; 235 #define TOTAL_MEM_SIZE (SLOTS_OFFSET + L1_CACHE_ALIGN(sizeof(struct NCR_700_command_slot) * NCR_700_COMMAND_SLOTS_PER_HOST)) 236 int saved_slot_position; 237 int command_slot_count; /* protected by state lock */ 238 __u8 tag_negotiated; 239 __u8 rev; 240 __u8 reselection_id; 241 __u8 min_period; 242 243 /* Free list, singly linked by ITL_forw elements */ 244 struct NCR_700_command_slot *free_list; 245 /* Completion for waited for ops, like reset, abort or 246 * device reset. 247 * 248 * NOTE: relies on single threading in the error handler to 249 * have only one outstanding at once */ 250 struct completion *eh_complete; 251 }; 252 253 /* 254 * 53C700 Register Interface - the offset from the Selected base 255 * I/O address */ 256 #ifdef CONFIG_53C700_LE_ON_BE 257 #define bE (hostdata->force_le_on_be ? 0 : 3) 258 #define bSWAP (hostdata->force_le_on_be) 259 #define bEBus (!hostdata->force_le_on_be) 260 #elif defined(__BIG_ENDIAN) 261 #define bE 3 262 #define bSWAP 0 263 #elif defined(__LITTLE_ENDIAN) 264 #define bE 0 265 #define bSWAP 0 266 #else 267 #error "__BIG_ENDIAN or __LITTLE_ENDIAN must be defined, did you include byteorder.h?" 268 #endif 269 #ifndef bEBus 270 #ifdef CONFIG_53C700_BE_BUS 271 #define bEBus 1 272 #else 273 #define bEBus 0 274 #endif 275 #endif 276 #define bS_to_cpu(x) (bSWAP ? le32_to_cpu(x) : (x)) 277 #define bS_to_host(x) (bSWAP ? cpu_to_le32(x) : (x)) 278 279 /* NOTE: These registers are in the LE register space only, the required byte 280 * swapping is done by the NCR_700_{read|write}[b] functions */ 281 #define SCNTL0_REG 0x00 282 #define FULL_ARBITRATION 0xc0 283 #define PARITY 0x08 284 #define ENABLE_PARITY 0x04 285 #define AUTO_ATN 0x02 286 #define SCNTL1_REG 0x01 287 #define SLOW_BUS 0x80 288 #define ENABLE_SELECT 0x20 289 #define ASSERT_RST 0x08 290 #define ASSERT_EVEN_PARITY 0x04 291 #define SDID_REG 0x02 292 #define SIEN_REG 0x03 293 #define PHASE_MM_INT 0x80 294 #define FUNC_COMP_INT 0x40 295 #define SEL_TIMEOUT_INT 0x20 296 #define SELECT_INT 0x10 297 #define GROSS_ERR_INT 0x08 298 #define UX_DISC_INT 0x04 299 #define RST_INT 0x02 300 #define PAR_ERR_INT 0x01 301 #define SCID_REG 0x04 302 #define SXFER_REG 0x05 303 #define ASYNC_OPERATION 0x00 304 #define SODL_REG 0x06 305 #define SOCL_REG 0x07 306 #define SFBR_REG 0x08 307 #define SIDL_REG 0x09 308 #define SBDL_REG 0x0A 309 #define SBCL_REG 0x0B 310 /* read bits */ 311 #define SBCL_IO 0x01 312 /*write bits */ 313 #define SYNC_DIV_AS_ASYNC 0x00 314 #define SYNC_DIV_1_0 0x01 315 #define SYNC_DIV_1_5 0x02 316 #define SYNC_DIV_2_0 0x03 317 #define DSTAT_REG 0x0C 318 #define ILGL_INST_DETECTED 0x01 319 #define WATCH_DOG_INTERRUPT 0x02 320 #define SCRIPT_INT_RECEIVED 0x04 321 #define ABORTED 0x10 322 #define SSTAT0_REG 0x0D 323 #define PARITY_ERROR 0x01 324 #define SCSI_RESET_DETECTED 0x02 325 #define UNEXPECTED_DISCONNECT 0x04 326 #define SCSI_GROSS_ERROR 0x08 327 #define SELECTED 0x10 328 #define SELECTION_TIMEOUT 0x20 329 #define FUNCTION_COMPLETE 0x40 330 #define PHASE_MISMATCH 0x80 331 #define SSTAT1_REG 0x0E 332 #define SIDL_REG_FULL 0x80 333 #define SODR_REG_FULL 0x40 334 #define SODL_REG_FULL 0x20 335 #define SSTAT2_REG 0x0F 336 #define CTEST0_REG 0x14 337 #define BTB_TIMER_DISABLE 0x40 338 #define CTEST1_REG 0x15 339 #define CTEST2_REG 0x16 340 #define CTEST3_REG 0x17 341 #define CTEST4_REG 0x18 342 #define DISABLE_FIFO 0x00 343 #define SLBE 0x10 344 #define SFWR 0x08 345 #define BYTE_LANE0 0x04 346 #define BYTE_LANE1 0x05 347 #define BYTE_LANE2 0x06 348 #define BYTE_LANE3 0x07 349 #define SCSI_ZMODE 0x20 350 #define ZMODE 0x40 351 #define CTEST5_REG 0x19 352 #define MASTER_CONTROL 0x10 353 #define DMA_DIRECTION 0x08 354 #define CTEST7_REG 0x1B 355 #define BURST_DISABLE 0x80 /* 710 only */ 356 #define SEL_TIMEOUT_DISABLE 0x10 /* 710 only */ 357 #define DFP 0x08 358 #define EVP 0x04 359 #define CTEST7_TT1 0x02 360 #define DIFF 0x01 361 #define CTEST6_REG 0x1A 362 #define TEMP_REG 0x1C 363 #define DFIFO_REG 0x20 364 #define FLUSH_DMA_FIFO 0x80 365 #define CLR_FIFO 0x40 366 #define ISTAT_REG 0x21 367 #define ABORT_OPERATION 0x80 368 #define SOFTWARE_RESET_710 0x40 369 #define DMA_INT_PENDING 0x01 370 #define SCSI_INT_PENDING 0x02 371 #define CONNECTED 0x08 372 #define CTEST8_REG 0x22 373 #define LAST_DIS_ENBL 0x01 374 #define SHORTEN_FILTERING 0x04 375 #define ENABLE_ACTIVE_NEGATION 0x10 376 #define GENERATE_RECEIVE_PARITY 0x20 377 #define CLR_FIFO_710 0x04 378 #define FLUSH_DMA_FIFO_710 0x08 379 #define CTEST9_REG 0x23 380 #define DBC_REG 0x24 381 #define DCMD_REG 0x27 382 #define DNAD_REG 0x28 383 #define DIEN_REG 0x39 384 #define BUS_FAULT 0x20 385 #define ABORT_INT 0x10 386 #define INT_INST_INT 0x04 387 #define WD_INT 0x02 388 #define ILGL_INST_INT 0x01 389 #define DCNTL_REG 0x3B 390 #define SOFTWARE_RESET 0x01 391 #define COMPAT_700_MODE 0x01 392 #define SCRPTS_16BITS 0x20 393 #define EA_710 0x20 394 #define ASYNC_DIV_2_0 0x00 395 #define ASYNC_DIV_1_5 0x40 396 #define ASYNC_DIV_1_0 0x80 397 #define ASYNC_DIV_3_0 0xc0 398 #define DMODE_710_REG 0x38 399 #define DMODE_700_REG 0x34 400 #define BURST_LENGTH_1 0x00 401 #define BURST_LENGTH_2 0x40 402 #define BURST_LENGTH_4 0x80 403 #define BURST_LENGTH_8 0xC0 404 #define DMODE_FC1 0x10 405 #define DMODE_FC2 0x20 406 #define BW16 32 407 #define MODE_286 16 408 #define IO_XFER 8 409 #define FIXED_ADDR 4 410 411 #define DSP_REG 0x2C 412 #define DSPS_REG 0x30 413 414 /* Parameters to begin SDTR negotiations. Empirically, I find that 415 * the 53c700-66 cannot handle an offset >8, so don't change this */ 416 #define NCR_700_MAX_OFFSET 8 417 /* Was hoping the max offset would be greater for the 710, but 418 * empirically it seems to be 8 also */ 419 #define NCR_710_MAX_OFFSET 8 420 #define NCR_700_MIN_XFERP 1 421 #define NCR_710_MIN_XFERP 0 422 #define NCR_700_MIN_PERIOD 25 /* for SDTR message, 100ns */ 423 424 #define script_patch_32(dev, script, symbol, value) \ 425 { \ 426 int i; \ 427 dma_addr_t da = value; \ 428 for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \ 429 __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]) + da; \ 430 (script)[A_##symbol##_used[i]] = bS_to_host(val); \ 431 dma_cache_sync((dev), &(script)[A_##symbol##_used[i]], 4, DMA_TO_DEVICE); \ 432 DEBUG((" script, patching %s at %d to %pad\n", \ 433 #symbol, A_##symbol##_used[i], &da)); \ 434 } \ 435 } 436 437 #define script_patch_32_abs(dev, script, symbol, value) \ 438 { \ 439 int i; \ 440 dma_addr_t da = value; \ 441 for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \ 442 (script)[A_##symbol##_used[i]] = bS_to_host(da); \ 443 dma_cache_sync((dev), &(script)[A_##symbol##_used[i]], 4, DMA_TO_DEVICE); \ 444 DEBUG((" script, patching %s at %d to %pad\n", \ 445 #symbol, A_##symbol##_used[i], &da)); \ 446 } \ 447 } 448 449 /* Used for patching the SCSI ID in the SELECT instruction */ 450 #define script_patch_ID(dev, script, symbol, value) \ 451 { \ 452 int i; \ 453 for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \ 454 __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]); \ 455 val &= 0xff00ffff; \ 456 val |= ((value) & 0xff) << 16; \ 457 (script)[A_##symbol##_used[i]] = bS_to_host(val); \ 458 dma_cache_sync((dev), &(script)[A_##symbol##_used[i]], 4, DMA_TO_DEVICE); \ 459 DEBUG((" script, patching ID field %s at %d to 0x%x\n", \ 460 #symbol, A_##symbol##_used[i], val)); \ 461 } \ 462 } 463 464 #define script_patch_16(dev, script, symbol, value) \ 465 { \ 466 int i; \ 467 for(i=0; i< (sizeof(A_##symbol##_used) / sizeof(__u32)); i++) { \ 468 __u32 val = bS_to_cpu((script)[A_##symbol##_used[i]]); \ 469 val &= 0xffff0000; \ 470 val |= ((value) & 0xffff); \ 471 (script)[A_##symbol##_used[i]] = bS_to_host(val); \ 472 dma_cache_sync((dev), &(script)[A_##symbol##_used[i]], 4, DMA_TO_DEVICE); \ 473 DEBUG((" script, patching short field %s at %d to 0x%x\n", \ 474 #symbol, A_##symbol##_used[i], val)); \ 475 } \ 476 } 477 478 479 static inline __u8 480 NCR_700_readb(struct Scsi_Host *host, __u32 reg) 481 { 482 const struct NCR_700_Host_Parameters *hostdata 483 = (struct NCR_700_Host_Parameters *)host->hostdata[0]; 484 485 return ioread8(hostdata->base + (reg^bE)); 486 } 487 488 static inline __u32 489 NCR_700_readl(struct Scsi_Host *host, __u32 reg) 490 { 491 const struct NCR_700_Host_Parameters *hostdata 492 = (struct NCR_700_Host_Parameters *)host->hostdata[0]; 493 __u32 value = bEBus ? ioread32be(hostdata->base + reg) : 494 ioread32(hostdata->base + reg); 495 #if 1 496 /* sanity check the register */ 497 BUG_ON((reg & 0x3) != 0); 498 #endif 499 500 return value; 501 } 502 503 static inline void 504 NCR_700_writeb(__u8 value, struct Scsi_Host *host, __u32 reg) 505 { 506 const struct NCR_700_Host_Parameters *hostdata 507 = (struct NCR_700_Host_Parameters *)host->hostdata[0]; 508 509 iowrite8(value, hostdata->base + (reg^bE)); 510 } 511 512 static inline void 513 NCR_700_writel(__u32 value, struct Scsi_Host *host, __u32 reg) 514 { 515 const struct NCR_700_Host_Parameters *hostdata 516 = (struct NCR_700_Host_Parameters *)host->hostdata[0]; 517 518 #if 1 519 /* sanity check the register */ 520 BUG_ON((reg & 0x3) != 0); 521 #endif 522 523 bEBus ? iowrite32be(value, hostdata->base + reg): 524 iowrite32(value, hostdata->base + reg); 525 } 526 527 #endif 528