Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * 53c710 driver. Modified from Drew Eckhardts driver |
| 3 | * for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] |
| 4 | * Check out PERM_OPTIONS and EXPECTED_CLOCK, which may be defined in the |
| 5 | * relevant machine specific file (eg. mvme16x.[ch], amiga7xx.[ch]). |
| 6 | * There are also currently some defines at the top of 53c7xx.scr. |
| 7 | * The chip type is #defined in script_asm.pl, as well as the Makefile. |
| 8 | * Host scsi ID expected to be 7 - see NCR53c7x0_init(). |
| 9 | * |
| 10 | * I have removed the PCI code and some of the 53c8xx specific code - |
| 11 | * simply to make this file smaller and easier to manage. |
| 12 | * |
| 13 | * MVME16x issues: |
| 14 | * Problems trying to read any chip registers in NCR53c7x0_init(), as they |
| 15 | * may never have been set by 16xBug (eg. If kernel has come in over tftp). |
| 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * Adapted for Linux/m68k Amiga platforms for the A4000T/A4091 and |
| 20 | * WarpEngine SCSI controllers. |
| 21 | * By Alan Hourihane <alanh@fairlite.demon.co.uk> |
| 22 | * Thanks to Richard Hirst for making it possible with the MVME additions |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * 53c710 rev 0 doesn't support add with carry. Rev 1 and 2 does. To |
| 27 | * overcome this problem you can define FORCE_DSA_ALIGNMENT, which ensures |
| 28 | * that the DSA address is always xxxxxx00. If disconnection is not allowed, |
| 29 | * then the script only ever tries to add small (< 256) positive offsets to |
| 30 | * DSA, so lack of carry isn't a problem. FORCE_DSA_ALIGNMENT can, of course, |
| 31 | * be defined for all chip revisions at a small cost in memory usage. |
| 32 | */ |
| 33 | |
| 34 | #define FORCE_DSA_ALIGNMENT |
| 35 | |
| 36 | /* |
| 37 | * Selection timer does not always work on the 53c710, depending on the |
| 38 | * timing at the last disconnect, if this is a problem for you, try |
| 39 | * using validids as detailed below. |
| 40 | * |
| 41 | * Options for the NCR7xx driver |
| 42 | * |
| 43 | * noasync:0 - disables sync and asynchronous negotiation |
| 44 | * nosync:0 - disables synchronous negotiation (does async) |
| 45 | * nodisconnect:0 - disables disconnection |
| 46 | * validids:0x?? - Bitmask field that disallows certain ID's. |
| 47 | * - e.g. 0x03 allows ID 0,1 |
| 48 | * - 0x1F allows ID 0,1,2,3,4 |
| 49 | * opthi:n - replace top word of options with 'n' |
| 50 | * optlo:n - replace bottom word of options with 'n' |
| 51 | * - ALWAYS SPECIFY opthi THEN optlo <<<<<<<<<< |
| 52 | */ |
| 53 | |
| 54 | /* |
| 55 | * PERM_OPTIONS are driver options which will be enabled for all NCR boards |
| 56 | * in the system at driver initialization time. |
| 57 | * |
| 58 | * Don't THINK about touching these in PERM_OPTIONS : |
| 59 | * OPTION_MEMORY_MAPPED |
| 60 | * 680x0 doesn't have an IO map! |
| 61 | * |
| 62 | * OPTION_DEBUG_TEST1 |
| 63 | * Test 1 does bus mastering and interrupt tests, which will help weed |
| 64 | * out brain damaged main boards. |
| 65 | * |
| 66 | * Other PERM_OPTIONS settings are listed below. Note the actual options |
| 67 | * required are set in the relevant file (mvme16x.c, amiga7xx.c, etc): |
| 68 | * |
| 69 | * OPTION_NO_ASYNC |
| 70 | * Don't negotiate for asynchronous transfers on the first command |
| 71 | * when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged |
| 72 | * devices which do something bad rather than sending a MESSAGE |
| 73 | * REJECT back to us like they should if they can't cope. |
| 74 | * |
| 75 | * OPTION_SYNCHRONOUS |
| 76 | * Enable support for synchronous transfers. Target negotiated |
| 77 | * synchronous transfers will be responded to. To initiate |
| 78 | * a synchronous transfer request, call |
| 79 | * |
| 80 | * request_synchronous (hostno, target) |
| 81 | * |
| 82 | * from within KGDB. |
| 83 | * |
| 84 | * OPTION_ALWAYS_SYNCHRONOUS |
| 85 | * Negotiate for synchronous transfers with every target after |
| 86 | * driver initialization or a SCSI bus reset. This is a bit dangerous, |
| 87 | * since there are some dain bramaged SCSI devices which will accept |
| 88 | * SDTR messages but keep talking asynchronously. |
| 89 | * |
| 90 | * OPTION_DISCONNECT |
| 91 | * Enable support for disconnect/reconnect. To change the |
| 92 | * default setting on a given host adapter, call |
| 93 | * |
| 94 | * request_disconnect (hostno, allow) |
| 95 | * |
| 96 | * where allow is non-zero to allow, 0 to disallow. |
| 97 | * |
| 98 | * If you really want to run 10MHz FAST SCSI-II transfers, you should |
| 99 | * know that the NCR driver currently ignores parity information. Most |
| 100 | * systems do 5MHz SCSI fine. I've seen a lot that have problems faster |
| 101 | * than 8MHz. To play it safe, we only request 5MHz transfers. |
| 102 | * |
| 103 | * If you'd rather get 10MHz transfers, edit sdtr_message and change |
| 104 | * the fourth byte from 50 to 25. |
| 105 | */ |
| 106 | |
| 107 | /* |
| 108 | * Sponsored by |
| 109 | * iX Multiuser Multitasking Magazine |
| 110 | * Hannover, Germany |
| 111 | * hm@ix.de |
| 112 | * |
| 113 | * Copyright 1993, 1994, 1995 Drew Eckhardt |
| 114 | * Visionary Computing |
| 115 | * (Unix and Linux consulting and custom programming) |
| 116 | * drew@PoohSticks.ORG |
| 117 | * +1 (303) 786-7975 |
| 118 | * |
| 119 | * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. |
| 120 | * |
| 121 | * For more information, please consult |
| 122 | * |
| 123 | * NCR53C810 |
| 124 | * SCSI I/O Processor |
| 125 | * Programmer's Guide |
| 126 | * |
| 127 | * NCR 53C810 |
| 128 | * PCI-SCSI I/O Processor |
| 129 | * Data Manual |
| 130 | * |
| 131 | * NCR 53C810/53C820 |
| 132 | * PCI-SCSI I/O Processor Design In Guide |
| 133 | * |
| 134 | * For literature on Symbios Logic Inc. formerly NCR, SCSI, |
| 135 | * and Communication products please call (800) 334-5454 or |
| 136 | * (719) 536-3300. |
| 137 | * |
| 138 | * PCI BIOS Specification Revision |
| 139 | * PCI Local Bus Specification |
| 140 | * PCI System Design Guide |
| 141 | * |
| 142 | * PCI Special Interest Group |
| 143 | * M/S HF3-15A |
| 144 | * 5200 N.E. Elam Young Parkway |
| 145 | * Hillsboro, Oregon 97124-6497 |
| 146 | * +1 (503) 696-2000 |
| 147 | * +1 (800) 433-5177 |
| 148 | */ |
| 149 | |
| 150 | /* |
| 151 | * Design issues : |
| 152 | * The cumulative latency needed to propagate a read/write request |
| 153 | * through the file system, buffer cache, driver stacks, SCSI host, and |
| 154 | * SCSI device is ultimately the limiting factor in throughput once we |
| 155 | * have a sufficiently fast host adapter. |
| 156 | * |
| 157 | * So, to maximize performance we want to keep the ratio of latency to data |
| 158 | * transfer time to a minimum by |
| 159 | * 1. Minimizing the total number of commands sent (typical command latency |
| 160 | * including drive and bus mastering host overhead is as high as 4.5ms) |
| 161 | * to transfer a given amount of data. |
| 162 | * |
| 163 | * This is accomplished by placing no arbitrary limit on the number |
| 164 | * of scatter/gather buffers supported, since we can transfer 1K |
| 165 | * per scatter/gather buffer without Eric's cluster patches, |
| 166 | * 4K with. |
| 167 | * |
| 168 | * 2. Minimizing the number of fatal interrupts serviced, since |
| 169 | * fatal interrupts halt the SCSI I/O processor. Basically, |
| 170 | * this means offloading the practical maximum amount of processing |
| 171 | * to the SCSI chip. |
| 172 | * |
| 173 | * On the NCR53c810/820/720, this is accomplished by using |
| 174 | * interrupt-on-the-fly signals when commands complete, |
| 175 | * and only handling fatal errors and SDTR / WDTR messages |
| 176 | * in the host code. |
| 177 | * |
| 178 | * On the NCR53c710, interrupts are generated as on the NCR53c8x0, |
| 179 | * only the lack of a interrupt-on-the-fly facility complicates |
| 180 | * things. Also, SCSI ID registers and commands are |
| 181 | * bit fielded rather than binary encoded. |
| 182 | * |
| 183 | * On the NCR53c700 and NCR53c700-66, operations that are done via |
| 184 | * indirect, table mode on the more advanced chips must be |
| 185 | * replaced by calls through a jump table which |
| 186 | * acts as a surrogate for the DSA. Unfortunately, this |
| 187 | * will mean that we must service an interrupt for each |
| 188 | * disconnect/reconnect. |
| 189 | * |
| 190 | * 3. Eliminating latency by pipelining operations at the different levels. |
| 191 | * |
| 192 | * This driver allows a configurable number of commands to be enqueued |
| 193 | * for each target/lun combination (experimentally, I have discovered |
| 194 | * that two seems to work best) and will ultimately allow for |
| 195 | * SCSI-II tagged queuing. |
| 196 | * |
| 197 | * |
| 198 | * Architecture : |
| 199 | * This driver is built around a Linux queue of commands waiting to |
| 200 | * be executed, and a shared Linux/NCR array of commands to start. Commands |
| 201 | * are transferred to the array by the run_process_issue_queue() function |
| 202 | * which is called whenever a command completes. |
| 203 | * |
| 204 | * As commands are completed, the interrupt routine is triggered, |
| 205 | * looks for commands in the linked list of completed commands with |
| 206 | * valid status, removes these commands from a list of running commands, |
| 207 | * calls the done routine, and flags their target/luns as not busy. |
| 208 | * |
| 209 | * Due to limitations in the intelligence of the NCR chips, certain |
| 210 | * concessions are made. In many cases, it is easier to dynamically |
| 211 | * generate/fix-up code rather than calculate on the NCR at run time. |
| 212 | * So, code is generated or fixed up for |
| 213 | * |
| 214 | * - Handling data transfers, using a variable number of MOVE instructions |
| 215 | * interspersed with CALL MSG_IN, WHEN MSGIN instructions. |
| 216 | * |
| 217 | * The DATAIN and DATAOUT routines are separate, so that an incorrect |
| 218 | * direction can be trapped, and space isn't wasted. |
| 219 | * |
| 220 | * It may turn out that we're better off using some sort |
| 221 | * of table indirect instruction in a loop with a variable |
| 222 | * sized table on the NCR53c710 and newer chips. |
| 223 | * |
| 224 | * - Checking for reselection (NCR53c710 and better) |
| 225 | * |
| 226 | * - Handling the details of SCSI context switches (NCR53c710 and better), |
| 227 | * such as reprogramming appropriate synchronous parameters, |
| 228 | * removing the dsa structure from the NCR's queue of outstanding |
| 229 | * commands, etc. |
| 230 | * |
| 231 | */ |
| 232 | |
| 233 | #include <linux/module.h> |
| 234 | |
| 235 | #include <linux/config.h> |
| 236 | |
| 237 | #include <linux/types.h> |
| 238 | #include <asm/setup.h> |
| 239 | #include <asm/dma.h> |
| 240 | #include <asm/io.h> |
| 241 | #include <asm/system.h> |
| 242 | #include <linux/delay.h> |
| 243 | #include <linux/signal.h> |
| 244 | #include <linux/sched.h> |
| 245 | #include <linux/errno.h> |
| 246 | #include <linux/string.h> |
| 247 | #include <linux/slab.h> |
| 248 | #include <linux/vmalloc.h> |
| 249 | #include <linux/mm.h> |
| 250 | #include <linux/ioport.h> |
| 251 | #include <linux/time.h> |
| 252 | #include <linux/blkdev.h> |
| 253 | #include <linux/spinlock.h> |
| 254 | #include <linux/interrupt.h> |
| 255 | #include <asm/pgtable.h> |
| 256 | |
| 257 | #ifdef CONFIG_AMIGA |
| 258 | #include <asm/amigahw.h> |
| 259 | #include <asm/amigaints.h> |
| 260 | #include <asm/irq.h> |
| 261 | |
| 262 | #define BIG_ENDIAN |
| 263 | #define NO_IO_SPACE |
| 264 | #endif |
| 265 | |
| 266 | #ifdef CONFIG_MVME16x |
| 267 | #include <asm/mvme16xhw.h> |
| 268 | |
| 269 | #define BIG_ENDIAN |
| 270 | #define NO_IO_SPACE |
| 271 | #define VALID_IDS |
| 272 | #endif |
| 273 | |
| 274 | #ifdef CONFIG_BVME6000 |
| 275 | #include <asm/bvme6000hw.h> |
| 276 | |
| 277 | #define BIG_ENDIAN |
| 278 | #define NO_IO_SPACE |
| 279 | #define VALID_IDS |
| 280 | #endif |
| 281 | |
| 282 | #include "scsi.h" |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 283 | #include <scsi/scsi_dbg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | #include <scsi/scsi_host.h> |
| 285 | #include "53c7xx.h" |
| 286 | #include <linux/stat.h> |
| 287 | #include <linux/stddef.h> |
| 288 | |
| 289 | #ifdef NO_IO_SPACE |
| 290 | /* |
| 291 | * The following make the definitions in 53c7xx.h (write8, etc) smaller, |
| 292 | * we don't have separate i/o space anyway. |
| 293 | */ |
| 294 | #undef inb |
| 295 | #undef outb |
| 296 | #undef inw |
| 297 | #undef outw |
| 298 | #undef inl |
| 299 | #undef outl |
| 300 | #define inb(x) 1 |
| 301 | #define inw(x) 1 |
| 302 | #define inl(x) 1 |
| 303 | #define outb(x,y) 1 |
| 304 | #define outw(x,y) 1 |
| 305 | #define outl(x,y) 1 |
| 306 | #endif |
| 307 | |
| 308 | static int check_address (unsigned long addr, int size); |
| 309 | static void dump_events (struct Scsi_Host *host, int count); |
| 310 | static Scsi_Cmnd * return_outstanding_commands (struct Scsi_Host *host, |
| 311 | int free, int issue); |
| 312 | static void hard_reset (struct Scsi_Host *host); |
| 313 | static void ncr_scsi_reset (struct Scsi_Host *host); |
| 314 | static void print_lots (struct Scsi_Host *host); |
| 315 | static void set_synchronous (struct Scsi_Host *host, int target, int sxfer, |
| 316 | int scntl3, int now_connected); |
| 317 | static int datapath_residual (struct Scsi_Host *host); |
| 318 | static const char * sbcl_to_phase (int sbcl); |
| 319 | static void print_progress (Scsi_Cmnd *cmd); |
| 320 | static void print_queues (struct Scsi_Host *host); |
| 321 | static void process_issue_queue (unsigned long flags); |
| 322 | static int shutdown (struct Scsi_Host *host); |
| 323 | static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int result); |
| 324 | static int disable (struct Scsi_Host *host); |
| 325 | static int NCR53c7xx_run_tests (struct Scsi_Host *host); |
| 326 | static irqreturn_t NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs); |
| 327 | static void NCR53c7x0_intfly (struct Scsi_Host *host); |
| 328 | static int ncr_halt (struct Scsi_Host *host); |
| 329 | static void intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd |
| 330 | *cmd); |
| 331 | static void intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd); |
| 332 | static void print_dsa (struct Scsi_Host *host, u32 *dsa, |
| 333 | const char *prefix); |
| 334 | static int print_insn (struct Scsi_Host *host, const u32 *insn, |
| 335 | const char *prefix, int kernel); |
| 336 | |
| 337 | static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd); |
| 338 | static void NCR53c7x0_init_fixup (struct Scsi_Host *host); |
| 339 | static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct |
| 340 | NCR53c7x0_cmd *cmd); |
| 341 | static void NCR53c7x0_soft_reset (struct Scsi_Host *host); |
| 342 | |
| 343 | /* Size of event list (per host adapter) */ |
| 344 | static int track_events = 0; |
| 345 | static struct Scsi_Host *first_host = NULL; /* Head of list of NCR boards */ |
| 346 | static Scsi_Host_Template *the_template = NULL; |
| 347 | |
| 348 | /* NCR53c710 script handling code */ |
| 349 | |
| 350 | #include "53c7xx_d.h" |
| 351 | #ifdef A_int_debug_sync |
| 352 | #define DEBUG_SYNC_INTR A_int_debug_sync |
| 353 | #endif |
| 354 | int NCR53c7xx_script_len = sizeof (SCRIPT); |
| 355 | int NCR53c7xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template; |
| 356 | #ifdef FORCE_DSA_ALIGNMENT |
| 357 | int CmdPageStart = (0 - Ent_dsa_zero - sizeof(struct NCR53c7x0_cmd)) & 0xff; |
| 358 | #endif |
| 359 | |
| 360 | static char *setup_strings[] = |
| 361 | {"","","","","","","",""}; |
| 362 | |
| 363 | #define MAX_SETUP_STRINGS (sizeof(setup_strings) / sizeof(char *)) |
| 364 | #define SETUP_BUFFER_SIZE 200 |
| 365 | static char setup_buffer[SETUP_BUFFER_SIZE]; |
| 366 | static char setup_used[MAX_SETUP_STRINGS]; |
| 367 | |
| 368 | void ncr53c7xx_setup (char *str, int *ints) |
| 369 | { |
| 370 | int i; |
| 371 | char *p1, *p2; |
| 372 | |
| 373 | p1 = setup_buffer; |
| 374 | *p1 = '\0'; |
| 375 | if (str) |
| 376 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); |
| 377 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; |
| 378 | p1 = setup_buffer; |
| 379 | i = 0; |
| 380 | while (*p1 && (i < MAX_SETUP_STRINGS)) { |
| 381 | p2 = strchr(p1, ','); |
| 382 | if (p2) { |
| 383 | *p2 = '\0'; |
| 384 | if (p1 != p2) |
| 385 | setup_strings[i] = p1; |
| 386 | p1 = p2 + 1; |
| 387 | i++; |
| 388 | } |
| 389 | else { |
| 390 | setup_strings[i] = p1; |
| 391 | break; |
| 392 | } |
| 393 | } |
| 394 | for (i=0; i<MAX_SETUP_STRINGS; i++) |
| 395 | setup_used[i] = 0; |
| 396 | } |
| 397 | |
| 398 | |
| 399 | /* check_setup_strings() returns index if key found, 0 if not |
| 400 | */ |
| 401 | |
| 402 | static int check_setup_strings(char *key, int *flags, int *val, char *buf) |
| 403 | { |
| 404 | int x; |
| 405 | char *cp; |
| 406 | |
| 407 | for (x=0; x<MAX_SETUP_STRINGS; x++) { |
| 408 | if (setup_used[x]) |
| 409 | continue; |
| 410 | if (!strncmp(setup_strings[x], key, strlen(key))) |
| 411 | break; |
| 412 | if (!strncmp(setup_strings[x], "next", strlen("next"))) |
| 413 | return 0; |
| 414 | } |
| 415 | if (x == MAX_SETUP_STRINGS) |
| 416 | return 0; |
| 417 | setup_used[x] = 1; |
| 418 | cp = setup_strings[x] + strlen(key); |
| 419 | *val = -1; |
| 420 | if (*cp != ':') |
| 421 | return ++x; |
| 422 | cp++; |
| 423 | if ((*cp >= '0') && (*cp <= '9')) { |
| 424 | *val = simple_strtoul(cp,NULL,0); |
| 425 | } |
| 426 | return ++x; |
| 427 | } |
| 428 | |
| 429 | |
| 430 | |
| 431 | /* |
| 432 | * KNOWN BUGS : |
| 433 | * - There is some sort of conflict when the PPP driver is compiled with |
| 434 | * support for 16 channels? |
| 435 | * |
| 436 | * - On systems which predate the 1.3.x initialization order change, |
| 437 | * the NCR driver will cause Cannot get free page messages to appear. |
| 438 | * These are harmless, but I don't know of an easy way to avoid them. |
| 439 | * |
| 440 | * - With OPTION_DISCONNECT, on two systems under unknown circumstances, |
| 441 | * we get a PHASE MISMATCH with DSA set to zero (suggests that we |
| 442 | * are occurring somewhere in the reselection code) where |
| 443 | * DSP=some value DCMD|DBC=same value. |
| 444 | * |
| 445 | * Closer inspection suggests that we may be trying to execute |
| 446 | * some portion of the DSA? |
| 447 | * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) |
| 448 | * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) |
| 449 | * scsi0 : no current command : unexpected phase MSGIN. |
| 450 | * DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0 |
| 451 | * DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80 |
| 452 | * scsi0 : DSP-> |
| 453 | * 001c46cc : 0x001c46cc 0x00000000 |
| 454 | * 001c46d4 : 0x001c5ea0 0x000011f8 |
| 455 | * |
| 456 | * Changed the print code in the phase_mismatch handler so |
| 457 | * that we call print_lots to try to diagnose this. |
| 458 | * |
| 459 | */ |
| 460 | |
| 461 | /* |
| 462 | * Possible future direction of architecture for max performance : |
| 463 | * |
| 464 | * We're using a single start array for the NCR chip. This is |
| 465 | * sub-optimal, because we cannot add a command which would conflict with |
| 466 | * an executing command to this start queue, and therefore must insert the |
| 467 | * next command for a given I/T/L combination after the first has completed; |
| 468 | * incurring our interrupt latency between SCSI commands. |
| 469 | * |
| 470 | * To allow further pipelining of the NCR and host CPU operation, we want |
| 471 | * to set things up so that immediately on termination of a command destined |
| 472 | * for a given LUN, we get that LUN busy again. |
| 473 | * |
| 474 | * To do this, we need to add a 32 bit pointer to which is jumped to |
| 475 | * on completion of a command. If no new command is available, this |
| 476 | * would point to the usual DSA issue queue select routine. |
| 477 | * |
| 478 | * If one were, it would point to a per-NCR53c7x0_cmd select routine |
| 479 | * which starts execution immediately, inserting the command at the head |
| 480 | * of the start queue if the NCR chip is selected or reselected. |
| 481 | * |
| 482 | * We would change so that we keep a list of outstanding commands |
| 483 | * for each unit, rather than a single running_list. We'd insert |
| 484 | * a new command into the right running list; if the NCR didn't |
| 485 | * have something running for that yet, we'd put it in the |
| 486 | * start queue as well. Some magic needs to happen to handle the |
| 487 | * race condition between the first command terminating before the |
| 488 | * new one is written. |
| 489 | * |
| 490 | * Potential for profiling : |
| 491 | * Call do_gettimeofday(struct timeval *tv) to get 800ns resolution. |
| 492 | */ |
| 493 | |
| 494 | |
| 495 | /* |
| 496 | * TODO : |
| 497 | * 1. To support WIDE transfers, not much needs to happen. We |
| 498 | * should do CHMOVE instructions instead of MOVEs when |
| 499 | * we have scatter/gather segments of uneven length. When |
| 500 | * we do this, we need to handle the case where we disconnect |
| 501 | * between segments. |
| 502 | * |
| 503 | * 2. Currently, when Icky things happen we do a FATAL(). Instead, |
| 504 | * we want to do an integrity check on the parts of the NCR hostdata |
| 505 | * structure which were initialized at boot time; FATAL() if that |
| 506 | * fails, and otherwise try to recover. Keep track of how many |
| 507 | * times this has happened within a single SCSI command; if it |
| 508 | * gets excessive, then FATAL(). |
| 509 | * |
| 510 | * 3. Parity checking is currently disabled, and a few things should |
| 511 | * happen here now that we support synchronous SCSI transfers : |
| 512 | * 1. On soft-reset, we shoould set the EPC (Enable Parity Checking) |
| 513 | * and AAP (Assert SATN/ on parity error) bits in SCNTL0. |
| 514 | * |
| 515 | * 2. We should enable the parity interrupt in the SIEN0 register. |
| 516 | * |
| 517 | * 3. intr_phase_mismatch() needs to believe that message out is |
| 518 | * always an "acceptable" phase to have a mismatch in. If |
| 519 | * the old phase was MSG_IN, we should send a MESSAGE PARITY |
| 520 | * error. If the old phase was something else, we should send |
| 521 | * a INITIATOR_DETECTED_ERROR message. Note that this could |
| 522 | * cause a RESTORE POINTERS message; so we should handle that |
| 523 | * correctly first. Instead, we should probably do an |
| 524 | * initiator_abort. |
| 525 | * |
| 526 | * 4. MPEE bit of CTEST4 should be set so we get interrupted if |
| 527 | * we detect an error. |
| 528 | * |
| 529 | * |
| 530 | * 5. The initial code has been tested on the NCR53c810. I don't |
| 531 | * have access to NCR53c700, 700-66 (Forex boards), NCR53c710 |
| 532 | * (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to |
| 533 | * finish development on those platforms. |
| 534 | * |
| 535 | * NCR53c820/825/720 - need to add wide transfer support, including WDTR |
| 536 | * negotiation, programming of wide transfer capabilities |
| 537 | * on reselection and table indirect selection. |
| 538 | * |
| 539 | * NCR53c710 - need to add fatal interrupt or GEN code for |
| 540 | * command completion signaling. Need to modify all |
| 541 | * SDID, SCID, etc. registers, and table indirect select code |
| 542 | * since these use bit fielded (ie 1<<target) instead of |
| 543 | * binary encoded target ids. Need to accommodate |
| 544 | * different register mappings, probably scan through |
| 545 | * the SCRIPT code and change the non SFBR register operand |
| 546 | * of all MOVE instructions. |
| 547 | * |
| 548 | * It is rather worse than this actually, the 710 corrupts |
| 549 | * both TEMP and DSA when you do a MOVE MEMORY. This |
| 550 | * screws you up all over the place. MOVE MEMORY 4 with a |
| 551 | * destination of DSA seems to work OK, which helps some. |
| 552 | * Richard Hirst richard@sleepie.demon.co.uk |
| 553 | * |
| 554 | * NCR53c700/700-66 - need to add code to refix addresses on |
| 555 | * every nexus change, eliminate all table indirect code, |
| 556 | * very messy. |
| 557 | * |
| 558 | * 6. The NCR53c7x0 series is very popular on other platforms that |
| 559 | * could be running Linux - ie, some high performance AMIGA SCSI |
| 560 | * boards use it. |
| 561 | * |
| 562 | * So, I should include #ifdef'd code so that it is |
| 563 | * compatible with these systems. |
| 564 | * |
| 565 | * Specifically, the little Endian assumptions I made in my |
| 566 | * bit fields need to change, and if the NCR doesn't see memory |
| 567 | * the right way, we need to provide options to reverse words |
| 568 | * when the scripts are relocated. |
| 569 | * |
| 570 | * 7. Use vremap() to access memory mapped boards. |
| 571 | */ |
| 572 | |
| 573 | /* |
| 574 | * Allow for simultaneous existence of multiple SCSI scripts so we |
| 575 | * can have a single driver binary for all of the family. |
| 576 | * |
| 577 | * - one for NCR53c700 and NCR53c700-66 chips (not yet supported) |
| 578 | * - one for rest (only the NCR53c810, 815, 820, and 825 are currently |
| 579 | * supported) |
| 580 | * |
| 581 | * So that we only need two SCSI scripts, we need to modify things so |
| 582 | * that we fixup register accesses in READ/WRITE instructions, and |
| 583 | * we'll also have to accommodate the bit vs. binary encoding of IDs |
| 584 | * with the 7xx chips. |
| 585 | */ |
| 586 | |
| 587 | #define ROUNDUP(adr,type) \ |
| 588 | ((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1))) |
| 589 | |
| 590 | |
| 591 | /* |
| 592 | * Function: issue_to_cmd |
| 593 | * |
| 594 | * Purpose: convert jump instruction in issue array to NCR53c7x0_cmd |
| 595 | * structure pointer. |
| 596 | * |
| 597 | * Inputs; issue - pointer to start of NOP or JUMP instruction |
| 598 | * in issue array. |
| 599 | * |
| 600 | * Returns: pointer to command on success; 0 if opcode is NOP. |
| 601 | */ |
| 602 | |
| 603 | static inline struct NCR53c7x0_cmd * |
| 604 | issue_to_cmd (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, |
| 605 | u32 *issue) |
| 606 | { |
| 607 | return (issue[0] != hostdata->NOP_insn) ? |
| 608 | /* |
| 609 | * If the IF TRUE bit is set, it's a JUMP instruction. The |
| 610 | * operand is a bus pointer to the dsa_begin routine for this DSA. The |
| 611 | * dsa field of the NCR53c7x0_cmd structure starts with the |
| 612 | * DSA code template. By converting to a virtual address, |
| 613 | * subtracting the code template size, and offset of the |
| 614 | * dsa field, we end up with a pointer to the start of the |
| 615 | * structure (alternatively, we could use the |
| 616 | * dsa_cmnd field, an anachronism from when we weren't |
| 617 | * sure what the relationship between the NCR structures |
| 618 | * and host structures were going to be. |
| 619 | */ |
| 620 | (struct NCR53c7x0_cmd *) ((char *) bus_to_virt (issue[1]) - |
| 621 | (hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) - |
| 622 | offsetof(struct NCR53c7x0_cmd, dsa)) |
| 623 | /* If the IF TRUE bit is not set, it's a NOP */ |
| 624 | : NULL; |
| 625 | } |
| 626 | |
| 627 | |
| 628 | /* |
| 629 | * FIXME: we should junk these, in favor of synchronous_want and |
| 630 | * wide_want in the NCR53c7x0_hostdata structure. |
| 631 | */ |
| 632 | |
| 633 | /* Template for "preferred" synchronous transfer parameters. */ |
| 634 | |
| 635 | static const unsigned char sdtr_message[] = { |
| 636 | #ifdef CONFIG_SCSI_NCR53C7xx_FAST |
| 637 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */ |
| 638 | #else |
| 639 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 50 /* *4ns */, 8 /* off */ |
| 640 | #endif |
| 641 | }; |
| 642 | |
| 643 | /* Template to request asynchronous transfers */ |
| 644 | |
| 645 | static const unsigned char async_message[] = { |
| 646 | EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */ |
| 647 | }; |
| 648 | |
| 649 | /* Template for "preferred" WIDE transfer parameters */ |
| 650 | |
| 651 | static const unsigned char wdtr_message[] = { |
| 652 | EXTENDED_MESSAGE, 2 /* length */, EXTENDED_WDTR, 1 /* 2^1 bytes */ |
| 653 | }; |
| 654 | |
| 655 | #if 0 |
| 656 | /* |
| 657 | * Function : struct Scsi_Host *find_host (int host) |
| 658 | * |
| 659 | * Purpose : KGDB support function which translates a host number |
| 660 | * to a host structure. |
| 661 | * |
| 662 | * Inputs : host - number of SCSI host |
| 663 | * |
| 664 | * Returns : NULL on failure, pointer to host structure on success. |
| 665 | */ |
| 666 | |
| 667 | static struct Scsi_Host * |
| 668 | find_host (int host) { |
| 669 | struct Scsi_Host *h; |
| 670 | for (h = first_host; h && h->host_no != host; h = h->next); |
| 671 | if (!h) { |
| 672 | printk (KERN_ALERT "scsi%d not found\n", host); |
| 673 | return NULL; |
| 674 | } else if (h->hostt != the_template) { |
| 675 | printk (KERN_ALERT "scsi%d is not a NCR board\n", host); |
| 676 | return NULL; |
| 677 | } |
| 678 | return h; |
| 679 | } |
| 680 | |
| 681 | #if 0 |
| 682 | /* |
| 683 | * Function : request_synchronous (int host, int target) |
| 684 | * |
| 685 | * Purpose : KGDB interface which will allow us to negotiate for |
| 686 | * synchronous transfers. This ill be replaced with a more |
| 687 | * integrated function; perhaps a new entry in the scsi_host |
| 688 | * structure, accessible via an ioctl() or perhaps /proc/scsi. |
| 689 | * |
| 690 | * Inputs : host - number of SCSI host; target - number of target. |
| 691 | * |
| 692 | * Returns : 0 when negotiation has been setup for next SCSI command, |
| 693 | * -1 on failure. |
| 694 | */ |
| 695 | |
| 696 | static int |
| 697 | request_synchronous (int host, int target) { |
| 698 | struct Scsi_Host *h; |
| 699 | struct NCR53c7x0_hostdata *hostdata; |
| 700 | unsigned long flags; |
| 701 | if (target < 0) { |
| 702 | printk (KERN_ALERT "target %d is bogus\n", target); |
| 703 | return -1; |
| 704 | } |
| 705 | if (!(h = find_host (host))) |
| 706 | return -1; |
| 707 | else if (h->this_id == target) { |
| 708 | printk (KERN_ALERT "target %d is host ID\n", target); |
| 709 | return -1; |
| 710 | } |
| 711 | else if (target > h->max_id) { |
| 712 | printk (KERN_ALERT "target %d exceeds maximum of %d\n", target, |
| 713 | h->max_id); |
| 714 | return -1; |
| 715 | } |
| 716 | hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0]; |
| 717 | |
| 718 | local_irq_save(flags); |
| 719 | if (hostdata->initiate_sdtr & (1 << target)) { |
| 720 | local_irq_restore(flags); |
| 721 | printk (KERN_ALERT "target %d already doing SDTR\n", target); |
| 722 | return -1; |
| 723 | } |
| 724 | hostdata->initiate_sdtr |= (1 << target); |
| 725 | local_irq_restore(flags); |
| 726 | return 0; |
| 727 | } |
| 728 | #endif |
| 729 | |
| 730 | /* |
| 731 | * Function : request_disconnect (int host, int on_or_off) |
| 732 | * |
| 733 | * Purpose : KGDB support function, tells us to allow or disallow |
| 734 | * disconnections. |
| 735 | * |
| 736 | * Inputs : host - number of SCSI host; on_or_off - non-zero to allow, |
| 737 | * zero to disallow. |
| 738 | * |
| 739 | * Returns : 0 on success, * -1 on failure. |
| 740 | */ |
| 741 | |
| 742 | static int |
| 743 | request_disconnect (int host, int on_or_off) { |
| 744 | struct Scsi_Host *h; |
| 745 | struct NCR53c7x0_hostdata *hostdata; |
| 746 | if (!(h = find_host (host))) |
| 747 | return -1; |
| 748 | hostdata = (struct NCR53c7x0_hostdata *) h->hostdata[0]; |
| 749 | if (on_or_off) |
| 750 | hostdata->options |= OPTION_DISCONNECT; |
| 751 | else |
| 752 | hostdata->options &= ~OPTION_DISCONNECT; |
| 753 | return 0; |
| 754 | } |
| 755 | #endif |
| 756 | |
| 757 | /* |
| 758 | * Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host) |
| 759 | * |
| 760 | * Purpose : Initialize internal structures, as required on startup, or |
| 761 | * after a SCSI bus reset. |
| 762 | * |
| 763 | * Inputs : host - pointer to this host adapter's structure |
| 764 | */ |
| 765 | |
| 766 | static void |
| 767 | NCR53c7x0_driver_init (struct Scsi_Host *host) { |
| 768 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 769 | host->hostdata[0]; |
| 770 | int i, j; |
| 771 | u32 *ncrcurrent; |
| 772 | |
| 773 | for (i = 0; i < 16; ++i) { |
| 774 | hostdata->request_sense[i] = 0; |
| 775 | for (j = 0; j < 8; ++j) |
| 776 | hostdata->busy[i][j] = 0; |
| 777 | set_synchronous (host, i, /* sxfer */ 0, hostdata->saved_scntl3, 0); |
| 778 | } |
| 779 | hostdata->issue_queue = NULL; |
| 780 | hostdata->running_list = hostdata->finished_queue = |
| 781 | hostdata->ncrcurrent = NULL; |
| 782 | for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; |
| 783 | i < host->can_queue; ++i, ncrcurrent += 2) { |
| 784 | ncrcurrent[0] = hostdata->NOP_insn; |
| 785 | ncrcurrent[1] = 0xdeadbeef; |
| 786 | } |
| 787 | ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | DBC_TCI_TRUE; |
| 788 | ncrcurrent[1] = (u32) virt_to_bus (hostdata->script) + |
| 789 | hostdata->E_wait_reselect; |
| 790 | hostdata->reconnect_dsa_head = 0; |
| 791 | hostdata->addr_reconnect_dsa_head = (u32) |
| 792 | virt_to_bus((void *) &(hostdata->reconnect_dsa_head)); |
| 793 | hostdata->expecting_iid = 0; |
| 794 | hostdata->expecting_sto = 0; |
| 795 | if (hostdata->options & OPTION_ALWAYS_SYNCHRONOUS) |
| 796 | hostdata->initiate_sdtr = 0xffff; |
| 797 | else |
| 798 | hostdata->initiate_sdtr = 0; |
| 799 | hostdata->talked_to = 0; |
| 800 | hostdata->idle = 1; |
| 801 | } |
| 802 | |
| 803 | /* |
| 804 | * Function : static int clock_to_ccf_710 (int clock) |
| 805 | * |
| 806 | * Purpose : Return the clock conversion factor for a given SCSI clock. |
| 807 | * |
| 808 | * Inputs : clock - SCSI clock expressed in Hz. |
| 809 | * |
| 810 | * Returns : ccf on success, -1 on failure. |
| 811 | */ |
| 812 | |
| 813 | static int |
| 814 | clock_to_ccf_710 (int clock) { |
| 815 | if (clock <= 16666666) |
| 816 | return -1; |
| 817 | if (clock <= 25000000) |
| 818 | return 2; /* Divide by 1.0 */ |
| 819 | else if (clock <= 37500000) |
| 820 | return 1; /* Divide by 1.5 */ |
| 821 | else if (clock <= 50000000) |
| 822 | return 0; /* Divide by 2.0 */ |
| 823 | else if (clock <= 66000000) |
| 824 | return 3; /* Divide by 3.0 */ |
| 825 | else |
| 826 | return -1; |
| 827 | } |
| 828 | |
| 829 | /* |
| 830 | * Function : static int NCR53c7x0_init (struct Scsi_Host *host) |
| 831 | * |
| 832 | * Purpose : initialize the internal structures for a given SCSI host |
| 833 | * |
| 834 | * Inputs : host - pointer to this host adapter's structure |
| 835 | * |
| 836 | * Preconditions : when this function is called, the chip_type |
| 837 | * field of the hostdata structure MUST have been set. |
| 838 | * |
| 839 | * Returns : 0 on success, -1 on failure. |
| 840 | */ |
| 841 | |
| 842 | int |
| 843 | NCR53c7x0_init (struct Scsi_Host *host) { |
| 844 | NCR53c7x0_local_declare(); |
| 845 | int i, ccf; |
| 846 | unsigned char revision; |
| 847 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 848 | host->hostdata[0]; |
| 849 | /* |
| 850 | * There are some things which we need to know about in order to provide |
| 851 | * a semblance of support. Print 'em if they aren't what we expect, |
| 852 | * otherwise don't add to the noise. |
| 853 | * |
| 854 | * -1 means we don't know what to expect. |
| 855 | */ |
| 856 | int val, flags; |
| 857 | char buf[32]; |
| 858 | int expected_id = -1; |
| 859 | int expected_clock = -1; |
| 860 | int uninitialized = 0; |
| 861 | #ifdef NO_IO_SPACE |
| 862 | int expected_mapping = OPTION_MEMORY_MAPPED; |
| 863 | #else |
| 864 | int expected_mapping = OPTION_IO_MAPPED; |
| 865 | #endif |
| 866 | for (i=0;i<7;i++) |
| 867 | hostdata->valid_ids[i] = 1; /* Default all ID's to scan */ |
| 868 | |
| 869 | /* Parse commandline flags */ |
| 870 | if (check_setup_strings("noasync",&flags,&val,buf)) |
| 871 | { |
| 872 | hostdata->options |= OPTION_NO_ASYNC; |
| 873 | hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); |
| 874 | } |
| 875 | |
| 876 | if (check_setup_strings("nosync",&flags,&val,buf)) |
| 877 | { |
| 878 | hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); |
| 879 | } |
| 880 | |
| 881 | if (check_setup_strings("nodisconnect",&flags,&val,buf)) |
| 882 | hostdata->options &= ~OPTION_DISCONNECT; |
| 883 | |
| 884 | if (check_setup_strings("validids",&flags,&val,buf)) |
| 885 | { |
| 886 | for (i=0;i<7;i++) |
| 887 | hostdata->valid_ids[i] = val & (1<<i); |
| 888 | } |
| 889 | |
| 890 | if ((i = check_setup_strings("next",&flags,&val,buf))) |
| 891 | { |
| 892 | while (i) |
| 893 | setup_used[--i] = 1; |
| 894 | } |
| 895 | |
| 896 | if (check_setup_strings("opthi",&flags,&val,buf)) |
| 897 | hostdata->options = (long long)val << 32; |
| 898 | if (check_setup_strings("optlo",&flags,&val,buf)) |
| 899 | hostdata->options |= val; |
| 900 | |
| 901 | NCR53c7x0_local_setup(host); |
| 902 | switch (hostdata->chip) { |
| 903 | case 710: |
| 904 | case 770: |
| 905 | hostdata->dstat_sir_intr = NCR53c7x0_dstat_sir_intr; |
| 906 | hostdata->init_save_regs = NULL; |
| 907 | hostdata->dsa_fixup = NCR53c7xx_dsa_fixup; |
| 908 | hostdata->init_fixup = NCR53c7x0_init_fixup; |
| 909 | hostdata->soft_reset = NCR53c7x0_soft_reset; |
| 910 | hostdata->run_tests = NCR53c7xx_run_tests; |
| 911 | expected_clock = hostdata->scsi_clock; |
| 912 | expected_id = 7; |
| 913 | break; |
| 914 | default: |
| 915 | printk ("scsi%d : chip type of %d is not supported yet, detaching.\n", |
| 916 | host->host_no, hostdata->chip); |
| 917 | scsi_unregister (host); |
| 918 | return -1; |
| 919 | } |
| 920 | |
| 921 | /* Assign constants accessed by NCR */ |
| 922 | hostdata->NCR53c7xx_zero = 0; |
| 923 | hostdata->NCR53c7xx_msg_reject = MESSAGE_REJECT; |
| 924 | hostdata->NCR53c7xx_msg_abort = ABORT; |
| 925 | hostdata->NCR53c7xx_msg_nop = NOP; |
| 926 | hostdata->NOP_insn = (DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24; |
| 927 | if (expected_mapping == -1 || |
| 928 | (hostdata->options & (OPTION_MEMORY_MAPPED)) != |
| 929 | (expected_mapping & OPTION_MEMORY_MAPPED)) |
| 930 | printk ("scsi%d : using %s mapped access\n", host->host_no, |
| 931 | (hostdata->options & OPTION_MEMORY_MAPPED) ? "memory" : |
| 932 | "io"); |
| 933 | |
| 934 | hostdata->dmode = (hostdata->chip == 700 || hostdata->chip == 70066) ? |
| 935 | DMODE_REG_00 : DMODE_REG_10; |
| 936 | hostdata->istat = ((hostdata->chip / 100) == 8) ? |
| 937 | ISTAT_REG_800 : ISTAT_REG_700; |
| 938 | |
| 939 | /* We have to assume that this may be the first access to the chip, so |
| 940 | * we must set EA in DCNTL. */ |
| 941 | |
| 942 | NCR53c7x0_write8 (DCNTL_REG, DCNTL_10_EA|DCNTL_10_COM); |
| 943 | |
| 944 | |
| 945 | /* Only the ISTAT register is readable when the NCR is running, so make |
| 946 | sure it's halted. */ |
| 947 | ncr_halt(host); |
| 948 | |
| 949 | /* |
| 950 | * XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc, |
| 951 | * as does the 710 with one bit per SCSI ID. Conversely, the NCR |
| 952 | * uses a normal, 3 bit binary representation of these values. |
| 953 | * |
| 954 | * Get the rest of the NCR documentation, and FIND OUT where the change |
| 955 | * was. |
| 956 | */ |
| 957 | |
| 958 | #if 0 |
| 959 | /* May not be able to do this - chip my not have been set up yet */ |
| 960 | tmp = hostdata->this_id_mask = NCR53c7x0_read8(SCID_REG); |
| 961 | for (host->this_id = 0; tmp != 1; tmp >>=1, ++host->this_id); |
| 962 | #else |
| 963 | host->this_id = 7; |
| 964 | #endif |
| 965 | |
| 966 | /* |
| 967 | * Note : we should never encounter a board setup for ID0. So, |
| 968 | * if we see ID0, assume that it was uninitialized and set it |
| 969 | * to the industry standard 7. |
| 970 | */ |
| 971 | if (!host->this_id) { |
| 972 | printk("scsi%d : initiator ID was %d, changing to 7\n", |
| 973 | host->host_no, host->this_id); |
| 974 | host->this_id = 7; |
| 975 | hostdata->this_id_mask = 1 << 7; |
| 976 | uninitialized = 1; |
| 977 | }; |
| 978 | |
| 979 | if (expected_id == -1 || host->this_id != expected_id) |
| 980 | printk("scsi%d : using initiator ID %d\n", host->host_no, |
| 981 | host->this_id); |
| 982 | |
| 983 | /* |
| 984 | * Save important registers to allow a soft reset. |
| 985 | */ |
| 986 | |
| 987 | /* |
| 988 | * CTEST7 controls cache snooping, burst mode, and support for |
| 989 | * external differential drivers. This isn't currently used - the |
| 990 | * default value may not be optimal anyway. |
| 991 | * Even worse, it may never have been set up since reset. |
| 992 | */ |
| 993 | hostdata->saved_ctest7 = NCR53c7x0_read8(CTEST7_REG) & CTEST7_SAVE; |
| 994 | revision = (NCR53c7x0_read8(CTEST8_REG) & 0xF0) >> 4; |
| 995 | switch (revision) { |
| 996 | case 1: revision = 0; break; |
| 997 | case 2: revision = 1; break; |
| 998 | case 4: revision = 2; break; |
| 999 | case 8: revision = 3; break; |
| 1000 | default: revision = 255; break; |
| 1001 | } |
| 1002 | printk("scsi%d: Revision 0x%x\n",host->host_no,revision); |
| 1003 | |
| 1004 | if ((revision == 0 || revision == 255) && (hostdata->options & (OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS))) |
| 1005 | { |
| 1006 | printk ("scsi%d: Disabling sync working and disconnect/reselect\n", |
| 1007 | host->host_no); |
| 1008 | hostdata->options &= ~(OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS); |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * On NCR53c700 series chips, DCNTL controls the SCSI clock divisor, |
| 1013 | * on 800 series chips, it allows for a totem-pole IRQ driver. |
| 1014 | * NOTE saved_dcntl currently overwritten in init function. |
| 1015 | * The value read here may be garbage anyway, MVME16x board at least |
| 1016 | * does not initialise chip if kernel arrived via tftp. |
| 1017 | */ |
| 1018 | |
| 1019 | hostdata->saved_dcntl = NCR53c7x0_read8(DCNTL_REG); |
| 1020 | |
| 1021 | /* |
| 1022 | * DMODE controls DMA burst length, and on 700 series chips, |
| 1023 | * 286 mode and bus width |
| 1024 | * NOTE: On MVME16x, chip may have been reset, so this could be a |
| 1025 | * power-on/reset default value. |
| 1026 | */ |
| 1027 | hostdata->saved_dmode = NCR53c7x0_read8(hostdata->dmode); |
| 1028 | |
| 1029 | /* |
| 1030 | * Now that burst length and enabled/disabled status is known, |
| 1031 | * clue the user in on it. |
| 1032 | */ |
| 1033 | |
| 1034 | ccf = clock_to_ccf_710 (expected_clock); |
| 1035 | |
| 1036 | for (i = 0; i < 16; ++i) |
| 1037 | hostdata->cmd_allocated[i] = 0; |
| 1038 | |
| 1039 | if (hostdata->init_save_regs) |
| 1040 | hostdata->init_save_regs (host); |
| 1041 | if (hostdata->init_fixup) |
| 1042 | hostdata->init_fixup (host); |
| 1043 | |
| 1044 | if (!the_template) { |
| 1045 | the_template = host->hostt; |
| 1046 | first_host = host; |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * Linux SCSI drivers have always been plagued with initialization |
| 1051 | * problems - some didn't work with the BIOS disabled since they expected |
| 1052 | * initialization from it, some didn't work when the networking code |
| 1053 | * was enabled and registers got scrambled, etc. |
| 1054 | * |
| 1055 | * To avoid problems like this, in the future, we will do a soft |
| 1056 | * reset on the SCSI chip, taking it back to a sane state. |
| 1057 | */ |
| 1058 | |
| 1059 | hostdata->soft_reset (host); |
| 1060 | |
| 1061 | #if 1 |
| 1062 | hostdata->debug_count_limit = -1; |
| 1063 | #else |
| 1064 | hostdata->debug_count_limit = 1; |
| 1065 | #endif |
| 1066 | hostdata->intrs = -1; |
| 1067 | hostdata->resets = -1; |
| 1068 | memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message, |
| 1069 | sizeof (hostdata->synchronous_want)); |
| 1070 | |
| 1071 | NCR53c7x0_driver_init (host); |
| 1072 | |
| 1073 | if (request_irq(host->irq, NCR53c7x0_intr, SA_SHIRQ, "53c7xx", host)) |
| 1074 | { |
| 1075 | printk("scsi%d : IRQ%d not free, detaching\n", |
| 1076 | host->host_no, host->irq); |
| 1077 | goto err_unregister; |
| 1078 | } |
| 1079 | |
| 1080 | if ((hostdata->run_tests && hostdata->run_tests(host) == -1) || |
| 1081 | (hostdata->options & OPTION_DEBUG_TESTS_ONLY)) { |
| 1082 | /* XXX Should disable interrupts, etc. here */ |
| 1083 | goto err_free_irq; |
| 1084 | } else { |
| 1085 | if (host->io_port) { |
| 1086 | host->n_io_port = 128; |
| 1087 | if (!request_region (host->io_port, host->n_io_port, "ncr53c7xx")) |
| 1088 | goto err_free_irq; |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | if (NCR53c7x0_read8 (SBCL_REG) & SBCL_BSY) { |
| 1093 | printk ("scsi%d : bus wedge, doing SCSI reset\n", host->host_no); |
| 1094 | hard_reset (host); |
| 1095 | } |
| 1096 | return 0; |
| 1097 | |
| 1098 | err_free_irq: |
| 1099 | free_irq(host->irq, NCR53c7x0_intr); |
| 1100 | err_unregister: |
| 1101 | scsi_unregister(host); |
| 1102 | return -1; |
| 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * Function : int ncr53c7xx_init(Scsi_Host_Template *tpnt, int board, int chip, |
| 1107 | * unsigned long base, int io_port, int irq, int dma, long long options, |
| 1108 | * int clock); |
| 1109 | * |
| 1110 | * Purpose : initializes a NCR53c7,8x0 based on base addresses, |
| 1111 | * IRQ, and DMA channel. |
| 1112 | * |
| 1113 | * Inputs : tpnt - Template for this SCSI adapter, board - board level |
| 1114 | * product, chip - 710 |
| 1115 | * |
| 1116 | * Returns : 0 on success, -1 on failure. |
| 1117 | * |
| 1118 | */ |
| 1119 | |
| 1120 | int |
| 1121 | ncr53c7xx_init (Scsi_Host_Template *tpnt, int board, int chip, |
| 1122 | unsigned long base, int io_port, int irq, int dma, |
| 1123 | long long options, int clock) |
| 1124 | { |
| 1125 | struct Scsi_Host *instance; |
| 1126 | struct NCR53c7x0_hostdata *hostdata; |
| 1127 | char chip_str[80]; |
| 1128 | int script_len = 0, dsa_len = 0, size = 0, max_cmd_size = 0, |
| 1129 | schedule_size = 0, ok = 0; |
| 1130 | void *tmp; |
| 1131 | unsigned long page; |
| 1132 | |
| 1133 | switch (chip) { |
| 1134 | case 710: |
| 1135 | case 770: |
| 1136 | schedule_size = (tpnt->can_queue + 1) * 8 /* JUMP instruction size */; |
| 1137 | script_len = NCR53c7xx_script_len; |
| 1138 | dsa_len = NCR53c7xx_dsa_len; |
| 1139 | options |= OPTION_INTFLY; |
| 1140 | sprintf (chip_str, "NCR53c%d", chip); |
| 1141 | break; |
| 1142 | default: |
| 1143 | printk("scsi-ncr53c7xx : unsupported SCSI chip %d\n", chip); |
| 1144 | return -1; |
| 1145 | } |
| 1146 | |
| 1147 | printk("scsi-ncr53c7xx : %s at memory 0x%lx, io 0x%x, irq %d", |
| 1148 | chip_str, base, io_port, irq); |
| 1149 | if (dma == DMA_NONE) |
| 1150 | printk("\n"); |
| 1151 | else |
| 1152 | printk(", dma %d\n", dma); |
| 1153 | |
| 1154 | if (options & OPTION_DEBUG_PROBE_ONLY) { |
| 1155 | printk ("scsi-ncr53c7xx : probe only enabled, aborting initialization\n"); |
| 1156 | return -1; |
| 1157 | } |
| 1158 | |
| 1159 | max_cmd_size = sizeof(struct NCR53c7x0_cmd) + dsa_len + |
| 1160 | /* Size of dynamic part of command structure : */ |
| 1161 | 2 * /* Worst case : we don't know if we need DATA IN or DATA out */ |
| 1162 | ( 2 * /* Current instructions per scatter/gather segment */ |
| 1163 | tpnt->sg_tablesize + |
| 1164 | 3 /* Current startup / termination required per phase */ |
| 1165 | ) * |
| 1166 | 8 /* Each instruction is eight bytes */; |
| 1167 | |
| 1168 | /* Allocate fixed part of hostdata, dynamic part to hold appropriate |
| 1169 | SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure. |
| 1170 | |
| 1171 | We need a NCR53c7x0_cmd structure for scan_scsis() when we are |
| 1172 | not loaded as a module, and when we're loaded as a module, we |
| 1173 | can't use a non-dynamically allocated structure because modules |
| 1174 | are vmalloc()'d, which can allow structures to cross page |
| 1175 | boundaries and breaks our physical/virtual address assumptions |
| 1176 | for DMA. |
| 1177 | |
| 1178 | So, we stick it past the end of our hostdata structure. |
| 1179 | |
| 1180 | ASSUMPTION : |
| 1181 | Regardless of how many simultaneous SCSI commands we allow, |
| 1182 | the probe code only executes a _single_ instruction at a time, |
| 1183 | so we only need one here, and don't need to allocate NCR53c7x0_cmd |
| 1184 | structures for each target until we are no longer in scan_scsis |
| 1185 | and kmalloc() has become functional (memory_init() happens |
| 1186 | after all device driver initialization). |
| 1187 | */ |
| 1188 | |
| 1189 | size = sizeof(struct NCR53c7x0_hostdata) + script_len + |
| 1190 | /* Note that alignment will be guaranteed, since we put the command |
| 1191 | allocated at probe time after the fixed-up SCSI script, which |
| 1192 | consists of 32 bit words, aligned on a 32 bit boundary. But |
| 1193 | on a 64bit machine we need 8 byte alignment for hostdata->free, so |
| 1194 | we add in another 4 bytes to take care of potential misalignment |
| 1195 | */ |
| 1196 | (sizeof(void *) - sizeof(u32)) + max_cmd_size + schedule_size; |
| 1197 | |
| 1198 | page = __get_free_pages(GFP_ATOMIC,1); |
| 1199 | if(page==0) |
| 1200 | { |
| 1201 | printk(KERN_ERR "53c7xx: out of memory.\n"); |
| 1202 | return -ENOMEM; |
| 1203 | } |
| 1204 | #ifdef FORCE_DSA_ALIGNMENT |
| 1205 | /* |
| 1206 | * 53c710 rev.0 doesn't have an add-with-carry instruction. |
| 1207 | * Ensure we allocate enough memory to force DSA alignment. |
| 1208 | */ |
| 1209 | size += 256; |
| 1210 | #endif |
| 1211 | /* Size should be < 8K, so we can fit it in two pages. */ |
| 1212 | if (size > 8192) { |
| 1213 | printk(KERN_ERR "53c7xx: hostdata > 8K\n"); |
| 1214 | return -1; |
| 1215 | } |
| 1216 | |
| 1217 | instance = scsi_register (tpnt, 4); |
| 1218 | if (!instance) |
| 1219 | { |
| 1220 | free_page(page); |
| 1221 | return -1; |
| 1222 | } |
| 1223 | instance->hostdata[0] = page; |
| 1224 | memset((void *)instance->hostdata[0], 0, 8192); |
| 1225 | cache_push(virt_to_phys((void *)(instance->hostdata[0])), 8192); |
| 1226 | cache_clear(virt_to_phys((void *)(instance->hostdata[0])), 8192); |
| 1227 | kernel_set_cachemode((void *)instance->hostdata[0], 8192, IOMAP_NOCACHE_SER); |
| 1228 | |
| 1229 | /* FIXME : if we ever support an ISA NCR53c7xx based board, we |
| 1230 | need to check if the chip is running in a 16 bit mode, and if so |
| 1231 | unregister it if it is past the 16M (0x1000000) mark */ |
| 1232 | |
| 1233 | hostdata = (struct NCR53c7x0_hostdata *)instance->hostdata[0]; |
| 1234 | hostdata->size = size; |
| 1235 | hostdata->script_count = script_len / sizeof(u32); |
| 1236 | hostdata->board = board; |
| 1237 | hostdata->chip = chip; |
| 1238 | |
| 1239 | /* |
| 1240 | * Being memory mapped is more desirable, since |
| 1241 | * |
| 1242 | * - Memory accesses may be faster. |
| 1243 | * |
| 1244 | * - The destination and source address spaces are the same for |
| 1245 | * all instructions, meaning we don't have to twiddle dmode or |
| 1246 | * any other registers. |
| 1247 | * |
| 1248 | * So, we try for memory mapped, and if we don't get it, |
| 1249 | * we go for port mapped, and that failing we tell the user |
| 1250 | * it can't work. |
| 1251 | */ |
| 1252 | |
| 1253 | if (base) { |
| 1254 | instance->base = base; |
| 1255 | /* Check for forced I/O mapping */ |
| 1256 | if (!(options & OPTION_IO_MAPPED)) { |
| 1257 | options |= OPTION_MEMORY_MAPPED; |
| 1258 | ok = 1; |
| 1259 | } |
| 1260 | } else { |
| 1261 | options &= ~OPTION_MEMORY_MAPPED; |
| 1262 | } |
| 1263 | |
| 1264 | if (io_port) { |
| 1265 | instance->io_port = io_port; |
| 1266 | options |= OPTION_IO_MAPPED; |
| 1267 | ok = 1; |
| 1268 | } else { |
| 1269 | options &= ~OPTION_IO_MAPPED; |
| 1270 | } |
| 1271 | |
| 1272 | if (!ok) { |
| 1273 | printk ("scsi%d : not initializing, no I/O or memory mapping known \n", |
| 1274 | instance->host_no); |
| 1275 | scsi_unregister (instance); |
| 1276 | return -1; |
| 1277 | } |
| 1278 | instance->irq = irq; |
| 1279 | instance->dma_channel = dma; |
| 1280 | |
| 1281 | hostdata->options = options; |
| 1282 | hostdata->dsa_len = dsa_len; |
| 1283 | hostdata->max_cmd_size = max_cmd_size; |
| 1284 | hostdata->num_cmds = 1; |
| 1285 | hostdata->scsi_clock = clock; |
| 1286 | /* Initialize single command */ |
| 1287 | tmp = (hostdata->script + hostdata->script_count); |
| 1288 | #ifdef FORCE_DSA_ALIGNMENT |
| 1289 | { |
| 1290 | void *t = ROUNDUP(tmp, void *); |
| 1291 | if (((u32)t & 0xff) > CmdPageStart) |
| 1292 | t = (void *)((u32)t + 255); |
| 1293 | t = (void *)(((u32)t & ~0xff) + CmdPageStart); |
| 1294 | hostdata->free = t; |
| 1295 | #if 0 |
| 1296 | printk ("scsi: Registered size increased by 256 to %d\n", size); |
| 1297 | printk ("scsi: CmdPageStart = 0x%02x\n", CmdPageStart); |
| 1298 | printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08x\n", |
| 1299 | (u32)tmp, (u32)t); |
| 1300 | #endif |
| 1301 | } |
| 1302 | #else |
| 1303 | hostdata->free = ROUNDUP(tmp, void *); |
| 1304 | #endif |
| 1305 | hostdata->free->real = tmp; |
| 1306 | hostdata->free->size = max_cmd_size; |
| 1307 | hostdata->free->free = NULL; |
| 1308 | hostdata->free->next = NULL; |
| 1309 | hostdata->extra_allocate = 0; |
| 1310 | |
| 1311 | /* Allocate command start code space */ |
| 1312 | hostdata->schedule = (chip == 700 || chip == 70066) ? |
| 1313 | NULL : (u32 *) ((char *)hostdata->free + max_cmd_size); |
| 1314 | |
| 1315 | /* |
| 1316 | * For diagnostic purposes, we don't really care how fast things blaze. |
| 1317 | * For profiling, we want to access the 800ns resolution system clock, |
| 1318 | * using a 'C' call on the host processor. |
| 1319 | * |
| 1320 | * Therefore, there's no need for the NCR chip to directly manipulate |
| 1321 | * this data, and we should put it wherever is most convenient for |
| 1322 | * Linux. |
| 1323 | */ |
| 1324 | if (track_events) |
| 1325 | hostdata->events = (struct NCR53c7x0_event *) (track_events ? |
| 1326 | vmalloc (sizeof (struct NCR53c7x0_event) * track_events) : NULL); |
| 1327 | else |
| 1328 | hostdata->events = NULL; |
| 1329 | |
| 1330 | if (hostdata->events) { |
| 1331 | memset ((void *) hostdata->events, 0, sizeof(struct NCR53c7x0_event) * |
| 1332 | track_events); |
| 1333 | hostdata->event_size = track_events; |
| 1334 | hostdata->event_index = 0; |
| 1335 | } else |
| 1336 | hostdata->event_size = 0; |
| 1337 | |
| 1338 | return NCR53c7x0_init(instance); |
| 1339 | } |
| 1340 | |
| 1341 | |
| 1342 | /* |
| 1343 | * Function : static void NCR53c7x0_init_fixup (struct Scsi_Host *host) |
| 1344 | * |
| 1345 | * Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device. |
| 1346 | * |
| 1347 | * Inputs : host - pointer to this host adapter's structure |
| 1348 | * |
| 1349 | */ |
| 1350 | |
| 1351 | static void |
| 1352 | NCR53c7x0_init_fixup (struct Scsi_Host *host) { |
| 1353 | NCR53c7x0_local_declare(); |
| 1354 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 1355 | host->hostdata[0]; |
| 1356 | unsigned char tmp; |
| 1357 | int i, ncr_to_memory, memory_to_ncr; |
| 1358 | u32 base; |
| 1359 | NCR53c7x0_local_setup(host); |
| 1360 | |
| 1361 | |
| 1362 | /* XXX - NOTE : this code MUST be made endian aware */ |
| 1363 | /* Copy code into buffer that was allocated at detection time. */ |
| 1364 | memcpy ((void *) hostdata->script, (void *) SCRIPT, |
| 1365 | sizeof(SCRIPT)); |
| 1366 | /* Fixup labels */ |
| 1367 | for (i = 0; i < PATCHES; ++i) |
| 1368 | hostdata->script[LABELPATCHES[i]] += |
| 1369 | virt_to_bus(hostdata->script); |
| 1370 | /* Fixup addresses of constants that used to be EXTERNAL */ |
| 1371 | |
| 1372 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_abort, |
| 1373 | virt_to_bus(&(hostdata->NCR53c7xx_msg_abort))); |
| 1374 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_reject, |
| 1375 | virt_to_bus(&(hostdata->NCR53c7xx_msg_reject))); |
| 1376 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_zero, |
| 1377 | virt_to_bus(&(hostdata->NCR53c7xx_zero))); |
| 1378 | patch_abs_32 (hostdata->script, 0, NCR53c7xx_sink, |
| 1379 | virt_to_bus(&(hostdata->NCR53c7xx_sink))); |
| 1380 | patch_abs_32 (hostdata->script, 0, NOP_insn, |
| 1381 | virt_to_bus(&(hostdata->NOP_insn))); |
| 1382 | patch_abs_32 (hostdata->script, 0, schedule, |
| 1383 | virt_to_bus((void *) hostdata->schedule)); |
| 1384 | |
| 1385 | /* Fixup references to external variables: */ |
| 1386 | for (i = 0; i < EXTERNAL_PATCHES_LEN; ++i) |
| 1387 | hostdata->script[EXTERNAL_PATCHES[i].offset] += |
| 1388 | virt_to_bus(EXTERNAL_PATCHES[i].address); |
| 1389 | |
| 1390 | /* |
| 1391 | * Fixup absolutes set at boot-time. |
| 1392 | * |
| 1393 | * All non-code absolute variables suffixed with "dsa_" and "int_" |
| 1394 | * are constants, and need no fixup provided the assembler has done |
| 1395 | * it for us (I don't know what the "real" NCR assembler does in |
| 1396 | * this case, my assembler does the right magic). |
| 1397 | */ |
| 1398 | |
| 1399 | patch_abs_rwri_data (hostdata->script, 0, dsa_save_data_pointer, |
| 1400 | Ent_dsa_code_save_data_pointer - Ent_dsa_zero); |
| 1401 | patch_abs_rwri_data (hostdata->script, 0, dsa_restore_pointers, |
| 1402 | Ent_dsa_code_restore_pointers - Ent_dsa_zero); |
| 1403 | patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, |
| 1404 | Ent_dsa_code_check_reselect - Ent_dsa_zero); |
| 1405 | |
| 1406 | /* |
| 1407 | * Just for the hell of it, preserve the settings of |
| 1408 | * Burst Length and Enable Read Line bits from the DMODE |
| 1409 | * register. Make sure SCRIPTS start automagically. |
| 1410 | */ |
| 1411 | |
| 1412 | #if defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) |
| 1413 | /* We know better what we want than 16xBug does! */ |
| 1414 | tmp = DMODE_10_BL_8 | DMODE_10_FC2; |
| 1415 | #else |
| 1416 | tmp = NCR53c7x0_read8(DMODE_REG_10); |
| 1417 | tmp &= (DMODE_BL_MASK | DMODE_10_FC2 | DMODE_10_FC1 | DMODE_710_PD | |
| 1418 | DMODE_710_UO); |
| 1419 | #endif |
| 1420 | |
| 1421 | if (!(hostdata->options & OPTION_MEMORY_MAPPED)) { |
| 1422 | base = (u32) host->io_port; |
| 1423 | memory_to_ncr = tmp|DMODE_800_DIOM; |
| 1424 | ncr_to_memory = tmp|DMODE_800_SIOM; |
| 1425 | } else { |
| 1426 | base = virt_to_bus((void *)host->base); |
| 1427 | memory_to_ncr = ncr_to_memory = tmp; |
| 1428 | } |
| 1429 | |
| 1430 | /* SCRATCHB_REG_10 == SCRATCHA_REG_800, as it happens */ |
| 1431 | patch_abs_32 (hostdata->script, 0, addr_scratch, base + SCRATCHA_REG_800); |
| 1432 | patch_abs_32 (hostdata->script, 0, addr_temp, base + TEMP_REG); |
| 1433 | patch_abs_32 (hostdata->script, 0, addr_dsa, base + DSA_REG); |
| 1434 | |
| 1435 | /* |
| 1436 | * I needed some variables in the script to be accessible to |
| 1437 | * both the NCR chip and the host processor. For these variables, |
| 1438 | * I made the arbitrary decision to store them directly in the |
| 1439 | * hostdata structure rather than in the RELATIVE area of the |
| 1440 | * SCRIPTS. |
| 1441 | */ |
| 1442 | |
| 1443 | |
| 1444 | patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_memory, tmp); |
| 1445 | patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_ncr, memory_to_ncr); |
| 1446 | patch_abs_rwri_data (hostdata->script, 0, dmode_ncr_to_memory, ncr_to_memory); |
| 1447 | |
| 1448 | patch_abs_32 (hostdata->script, 0, msg_buf, |
| 1449 | virt_to_bus((void *)&(hostdata->msg_buf))); |
| 1450 | patch_abs_32 (hostdata->script, 0, reconnect_dsa_head, |
| 1451 | virt_to_bus((void *)&(hostdata->reconnect_dsa_head))); |
| 1452 | patch_abs_32 (hostdata->script, 0, addr_reconnect_dsa_head, |
| 1453 | virt_to_bus((void *)&(hostdata->addr_reconnect_dsa_head))); |
| 1454 | patch_abs_32 (hostdata->script, 0, reselected_identify, |
| 1455 | virt_to_bus((void *)&(hostdata->reselected_identify))); |
| 1456 | /* reselected_tag is currently unused */ |
| 1457 | #if 0 |
| 1458 | patch_abs_32 (hostdata->script, 0, reselected_tag, |
| 1459 | virt_to_bus((void *)&(hostdata->reselected_tag))); |
| 1460 | #endif |
| 1461 | |
| 1462 | patch_abs_32 (hostdata->script, 0, test_dest, |
| 1463 | virt_to_bus((void*)&hostdata->test_dest)); |
| 1464 | patch_abs_32 (hostdata->script, 0, test_src, |
| 1465 | virt_to_bus(&hostdata->test_source)); |
| 1466 | patch_abs_32 (hostdata->script, 0, saved_dsa, |
| 1467 | virt_to_bus((void *)&hostdata->saved2_dsa)); |
| 1468 | patch_abs_32 (hostdata->script, 0, emulfly, |
| 1469 | virt_to_bus((void *)&hostdata->emulated_intfly)); |
| 1470 | |
| 1471 | patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, |
| 1472 | (unsigned char)(Ent_dsa_code_check_reselect - Ent_dsa_zero)); |
| 1473 | |
| 1474 | /* These are for event logging; the ncr_event enum contains the |
| 1475 | actual interrupt numbers. */ |
| 1476 | #ifdef A_int_EVENT_SELECT |
| 1477 | patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT, (u32) EVENT_SELECT); |
| 1478 | #endif |
| 1479 | #ifdef A_int_EVENT_DISCONNECT |
| 1480 | patch_abs_32 (hostdata->script, 0, int_EVENT_DISCONNECT, (u32) EVENT_DISCONNECT); |
| 1481 | #endif |
| 1482 | #ifdef A_int_EVENT_RESELECT |
| 1483 | patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT, (u32) EVENT_RESELECT); |
| 1484 | #endif |
| 1485 | #ifdef A_int_EVENT_COMPLETE |
| 1486 | patch_abs_32 (hostdata->script, 0, int_EVENT_COMPLETE, (u32) EVENT_COMPLETE); |
| 1487 | #endif |
| 1488 | #ifdef A_int_EVENT_IDLE |
| 1489 | patch_abs_32 (hostdata->script, 0, int_EVENT_IDLE, (u32) EVENT_IDLE); |
| 1490 | #endif |
| 1491 | #ifdef A_int_EVENT_SELECT_FAILED |
| 1492 | patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT_FAILED, |
| 1493 | (u32) EVENT_SELECT_FAILED); |
| 1494 | #endif |
| 1495 | #ifdef A_int_EVENT_BEFORE_SELECT |
| 1496 | patch_abs_32 (hostdata->script, 0, int_EVENT_BEFORE_SELECT, |
| 1497 | (u32) EVENT_BEFORE_SELECT); |
| 1498 | #endif |
| 1499 | #ifdef A_int_EVENT_RESELECT_FAILED |
| 1500 | patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT_FAILED, |
| 1501 | (u32) EVENT_RESELECT_FAILED); |
| 1502 | #endif |
| 1503 | |
| 1504 | /* |
| 1505 | * Make sure the NCR and Linux code agree on the location of |
| 1506 | * certain fields. |
| 1507 | */ |
| 1508 | |
| 1509 | hostdata->E_accept_message = Ent_accept_message; |
| 1510 | hostdata->E_command_complete = Ent_command_complete; |
| 1511 | hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout; |
| 1512 | hostdata->E_data_transfer = Ent_data_transfer; |
| 1513 | hostdata->E_debug_break = Ent_debug_break; |
| 1514 | hostdata->E_dsa_code_template = Ent_dsa_code_template; |
| 1515 | hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end; |
| 1516 | hostdata->E_end_data_transfer = Ent_end_data_transfer; |
| 1517 | hostdata->E_initiator_abort = Ent_initiator_abort; |
| 1518 | hostdata->E_msg_in = Ent_msg_in; |
| 1519 | hostdata->E_other_transfer = Ent_other_transfer; |
| 1520 | hostdata->E_other_in = Ent_other_in; |
| 1521 | hostdata->E_other_out = Ent_other_out; |
| 1522 | hostdata->E_reject_message = Ent_reject_message; |
| 1523 | hostdata->E_respond_message = Ent_respond_message; |
| 1524 | hostdata->E_select = Ent_select; |
| 1525 | hostdata->E_select_msgout = Ent_select_msgout; |
| 1526 | hostdata->E_target_abort = Ent_target_abort; |
| 1527 | #ifdef Ent_test_0 |
| 1528 | hostdata->E_test_0 = Ent_test_0; |
| 1529 | #endif |
| 1530 | hostdata->E_test_1 = Ent_test_1; |
| 1531 | hostdata->E_test_2 = Ent_test_2; |
| 1532 | #ifdef Ent_test_3 |
| 1533 | hostdata->E_test_3 = Ent_test_3; |
| 1534 | #endif |
| 1535 | hostdata->E_wait_reselect = Ent_wait_reselect; |
| 1536 | hostdata->E_dsa_code_begin = Ent_dsa_code_begin; |
| 1537 | |
| 1538 | hostdata->dsa_cmdout = A_dsa_cmdout; |
| 1539 | hostdata->dsa_cmnd = A_dsa_cmnd; |
| 1540 | hostdata->dsa_datain = A_dsa_datain; |
| 1541 | hostdata->dsa_dataout = A_dsa_dataout; |
| 1542 | hostdata->dsa_end = A_dsa_end; |
| 1543 | hostdata->dsa_msgin = A_dsa_msgin; |
| 1544 | hostdata->dsa_msgout = A_dsa_msgout; |
| 1545 | hostdata->dsa_msgout_other = A_dsa_msgout_other; |
| 1546 | hostdata->dsa_next = A_dsa_next; |
| 1547 | hostdata->dsa_select = A_dsa_select; |
| 1548 | hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero; |
| 1549 | hostdata->dsa_status = A_dsa_status; |
| 1550 | hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero + |
| 1551 | 8 /* destination operand */; |
| 1552 | |
| 1553 | /* sanity check */ |
| 1554 | if (A_dsa_fields_start != Ent_dsa_code_template_end - |
| 1555 | Ent_dsa_zero) |
| 1556 | printk("scsi%d : NCR dsa_fields start is %d not %d\n", |
| 1557 | host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end - |
| 1558 | Ent_dsa_zero); |
| 1559 | |
| 1560 | printk("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n", host->host_no, |
| 1561 | virt_to_bus(hostdata->script), hostdata->script); |
| 1562 | } |
| 1563 | |
| 1564 | /* |
| 1565 | * Function : static int NCR53c7xx_run_tests (struct Scsi_Host *host) |
| 1566 | * |
| 1567 | * Purpose : run various verification tests on the NCR chip, |
| 1568 | * including interrupt generation, and proper bus mastering |
| 1569 | * operation. |
| 1570 | * |
| 1571 | * Inputs : host - a properly initialized Scsi_Host structure |
| 1572 | * |
| 1573 | * Preconditions : the NCR chip must be in a halted state. |
| 1574 | * |
| 1575 | * Returns : 0 if all tests were successful, -1 on error. |
| 1576 | * |
| 1577 | */ |
| 1578 | |
| 1579 | static int |
| 1580 | NCR53c7xx_run_tests (struct Scsi_Host *host) { |
| 1581 | NCR53c7x0_local_declare(); |
| 1582 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 1583 | host->hostdata[0]; |
| 1584 | unsigned long timeout; |
| 1585 | u32 start; |
| 1586 | int failed, i; |
| 1587 | unsigned long flags; |
| 1588 | NCR53c7x0_local_setup(host); |
| 1589 | |
| 1590 | /* The NCR chip _must_ be idle to run the test scripts */ |
| 1591 | |
| 1592 | local_irq_save(flags); |
| 1593 | if (!hostdata->idle) { |
| 1594 | printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); |
| 1595 | local_irq_restore(flags); |
| 1596 | return -1; |
| 1597 | } |
| 1598 | |
| 1599 | /* |
| 1600 | * Check for functional interrupts, this could work as an |
| 1601 | * autoprobe routine. |
| 1602 | */ |
| 1603 | |
| 1604 | if ((hostdata->options & OPTION_DEBUG_TEST1) && |
| 1605 | hostdata->state != STATE_DISABLED) { |
| 1606 | hostdata->idle = 0; |
| 1607 | hostdata->test_running = 1; |
| 1608 | hostdata->test_completed = -1; |
| 1609 | hostdata->test_dest = 0; |
| 1610 | hostdata->test_source = 0xdeadbeef; |
| 1611 | start = virt_to_bus (hostdata->script) + hostdata->E_test_1; |
| 1612 | hostdata->state = STATE_RUNNING; |
| 1613 | printk ("scsi%d : test 1", host->host_no); |
| 1614 | NCR53c7x0_write32 (DSP_REG, start); |
| 1615 | if (hostdata->options & OPTION_DEBUG_TRACE) |
| 1616 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM | |
| 1617 | DCNTL_STD); |
| 1618 | printk (" started\n"); |
| 1619 | local_irq_restore(flags); |
| 1620 | |
| 1621 | /* |
| 1622 | * This is currently a .5 second timeout, since (in theory) no slow |
| 1623 | * board will take that long. In practice, we've seen one |
| 1624 | * pentium which occassionally fails with this, but works with |
| 1625 | * 10 times as much? |
| 1626 | */ |
| 1627 | |
| 1628 | timeout = jiffies + 5 * HZ / 10; |
| 1629 | while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) |
| 1630 | barrier(); |
| 1631 | |
| 1632 | failed = 1; |
| 1633 | if (hostdata->test_completed == -1) |
| 1634 | printk ("scsi%d : driver test 1 timed out%s\n",host->host_no , |
| 1635 | (hostdata->test_dest == 0xdeadbeef) ? |
| 1636 | " due to lost interrupt.\n" |
| 1637 | " Please verify that the correct IRQ is being used for your board,\n" |
| 1638 | : ""); |
| 1639 | else if (hostdata->test_completed != 1) |
| 1640 | printk ("scsi%d : test 1 bad interrupt value (%d)\n", |
| 1641 | host->host_no, hostdata->test_completed); |
| 1642 | else |
| 1643 | failed = (hostdata->test_dest != 0xdeadbeef); |
| 1644 | |
| 1645 | if (hostdata->test_dest != 0xdeadbeef) { |
| 1646 | printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n" |
| 1647 | " probable cache invalidation problem. Please configure caching\n" |
| 1648 | " as write-through or disabled\n", |
| 1649 | host->host_no, hostdata->test_dest); |
| 1650 | } |
| 1651 | |
| 1652 | if (failed) { |
| 1653 | printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n", |
| 1654 | host->host_no, bus_to_virt(NCR53c7x0_read32(DSP_REG)), |
| 1655 | hostdata->script, start); |
| 1656 | printk ("scsi%d : DSPS = 0x%x\n", host->host_no, |
| 1657 | NCR53c7x0_read32(DSPS_REG)); |
| 1658 | local_irq_restore(flags); |
| 1659 | return -1; |
| 1660 | } |
| 1661 | hostdata->test_running = 0; |
| 1662 | } |
| 1663 | |
| 1664 | if ((hostdata->options & OPTION_DEBUG_TEST2) && |
| 1665 | hostdata->state != STATE_DISABLED) { |
| 1666 | u32 dsa[48]; |
| 1667 | unsigned char identify = IDENTIFY(0, 0); |
| 1668 | unsigned char cmd[6]; |
| 1669 | unsigned char data[36]; |
| 1670 | unsigned char status = 0xff; |
| 1671 | unsigned char msg = 0xff; |
| 1672 | |
| 1673 | cmd[0] = INQUIRY; |
| 1674 | cmd[1] = cmd[2] = cmd[3] = cmd[5] = 0; |
| 1675 | cmd[4] = sizeof(data); |
| 1676 | |
| 1677 | dsa[2] = 1; |
| 1678 | dsa[3] = virt_to_bus(&identify); |
| 1679 | dsa[4] = 6; |
| 1680 | dsa[5] = virt_to_bus(&cmd); |
| 1681 | dsa[6] = sizeof(data); |
| 1682 | dsa[7] = virt_to_bus(&data); |
| 1683 | dsa[8] = 1; |
| 1684 | dsa[9] = virt_to_bus(&status); |
| 1685 | dsa[10] = 1; |
| 1686 | dsa[11] = virt_to_bus(&msg); |
| 1687 | |
| 1688 | for (i = 0; i < 6; ++i) { |
| 1689 | #ifdef VALID_IDS |
| 1690 | if (!hostdata->valid_ids[i]) |
| 1691 | continue; |
| 1692 | #endif |
| 1693 | local_irq_disable(); |
| 1694 | if (!hostdata->idle) { |
| 1695 | printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); |
| 1696 | local_irq_restore(flags); |
| 1697 | return -1; |
| 1698 | } |
| 1699 | |
| 1700 | /* 710: bit mapped scsi ID, async */ |
| 1701 | dsa[0] = (1 << i) << 16; |
| 1702 | hostdata->idle = 0; |
| 1703 | hostdata->test_running = 2; |
| 1704 | hostdata->test_completed = -1; |
| 1705 | start = virt_to_bus(hostdata->script) + hostdata->E_test_2; |
| 1706 | hostdata->state = STATE_RUNNING; |
| 1707 | NCR53c7x0_write32 (DSA_REG, virt_to_bus(dsa)); |
| 1708 | NCR53c7x0_write32 (DSP_REG, start); |
| 1709 | if (hostdata->options & OPTION_DEBUG_TRACE) |
| 1710 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | |
| 1711 | DCNTL_SSM | DCNTL_STD); |
| 1712 | local_irq_restore(flags); |
| 1713 | |
| 1714 | timeout = jiffies + 5 * HZ; /* arbitrary */ |
| 1715 | while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) |
| 1716 | barrier(); |
| 1717 | |
| 1718 | NCR53c7x0_write32 (DSA_REG, 0); |
| 1719 | |
| 1720 | if (hostdata->test_completed == 2) { |
| 1721 | data[35] = 0; |
| 1722 | printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n", |
| 1723 | host->host_no, i, data + 8); |
| 1724 | printk ("scsi%d : status ", host->host_no); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 1725 | scsi_print_status (status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | printk ("\nscsi%d : message ", host->host_no); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 1727 | scsi_print_msg (&msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | printk ("\n"); |
| 1729 | } else if (hostdata->test_completed == 3) { |
| 1730 | printk("scsi%d : test 2 no connection with target %d\n", |
| 1731 | host->host_no, i); |
| 1732 | if (!hostdata->idle) { |
| 1733 | printk("scsi%d : not idle\n", host->host_no); |
| 1734 | local_irq_restore(flags); |
| 1735 | return -1; |
| 1736 | } |
| 1737 | } else if (hostdata->test_completed == -1) { |
| 1738 | printk ("scsi%d : test 2 timed out\n", host->host_no); |
| 1739 | local_irq_restore(flags); |
| 1740 | return -1; |
| 1741 | } |
| 1742 | hostdata->test_running = 0; |
| 1743 | } |
| 1744 | } |
| 1745 | |
| 1746 | local_irq_restore(flags); |
| 1747 | return 0; |
| 1748 | } |
| 1749 | |
| 1750 | /* |
| 1751 | * Function : static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) |
| 1752 | * |
| 1753 | * Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer, |
| 1754 | * performing all necessary relocation. |
| 1755 | * |
| 1756 | * Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large |
| 1757 | * enough to hold the NCR53c8xx dsa. |
| 1758 | */ |
| 1759 | |
| 1760 | static void |
| 1761 | NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) { |
| 1762 | Scsi_Cmnd *c = cmd->cmd; |
| 1763 | struct Scsi_Host *host = c->device->host; |
| 1764 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 1765 | host->hostdata[0]; |
| 1766 | int i; |
| 1767 | |
| 1768 | memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template / 4), |
| 1769 | hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template); |
| 1770 | |
| 1771 | /* |
| 1772 | * Note : within the NCR 'C' code, dsa points to the _start_ |
| 1773 | * of the DSA structure, and _not_ the offset of dsa_zero within |
| 1774 | * that structure used to facilitate shorter signed offsets |
| 1775 | * for the 8 bit ALU. |
| 1776 | * |
| 1777 | * The implications of this are that |
| 1778 | * |
| 1779 | * - 32 bit A_dsa_* absolute values require an additional |
| 1780 | * dsa_zero added to their value to be correct, since they are |
| 1781 | * relative to dsa_zero which is in essentially a separate |
| 1782 | * space from the code symbols. |
| 1783 | * |
| 1784 | * - All other symbols require no special treatment. |
| 1785 | */ |
| 1786 | |
| 1787 | patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1788 | dsa_temp_lun, c->device->lun); |
| 1789 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1790 | dsa_temp_addr_next, virt_to_bus(&cmd->dsa_next_addr)); |
| 1791 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1792 | dsa_temp_next, virt_to_bus(cmd->dsa) + Ent_dsa_zero - |
| 1793 | Ent_dsa_code_template + A_dsa_next); |
| 1794 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1795 | dsa_temp_sync, virt_to_bus((void *)hostdata->sync[c->device->id].script)); |
| 1796 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1797 | dsa_sscf_710, virt_to_bus((void *)&hostdata->sync[c->device->id].sscf_710)); |
| 1798 | patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1799 | dsa_temp_target, 1 << c->device->id); |
| 1800 | /* XXX - new pointer stuff */ |
| 1801 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1802 | dsa_temp_addr_saved_pointer, virt_to_bus(&cmd->saved_data_pointer)); |
| 1803 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1804 | dsa_temp_addr_saved_residual, virt_to_bus(&cmd->saved_residual)); |
| 1805 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1806 | dsa_temp_addr_residual, virt_to_bus(&cmd->residual)); |
| 1807 | |
| 1808 | /* XXX - new start stuff */ |
| 1809 | |
| 1810 | patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), |
| 1811 | dsa_temp_addr_dsa_value, virt_to_bus(&cmd->dsa_addr)); |
| 1812 | } |
| 1813 | |
| 1814 | /* |
| 1815 | * Function : run_process_issue_queue (void) |
| 1816 | * |
| 1817 | * Purpose : insure that the coroutine is running and will process our |
| 1818 | * request. process_issue_queue_running is checked/set here (in an |
| 1819 | * inline function) rather than in process_issue_queue itself to reduce |
| 1820 | * the chances of stack overflow. |
| 1821 | * |
| 1822 | */ |
| 1823 | |
| 1824 | static volatile int process_issue_queue_running = 0; |
| 1825 | |
| 1826 | static __inline__ void |
| 1827 | run_process_issue_queue(void) { |
| 1828 | unsigned long flags; |
| 1829 | local_irq_save(flags); |
| 1830 | if (!process_issue_queue_running) { |
| 1831 | process_issue_queue_running = 1; |
| 1832 | process_issue_queue(flags); |
| 1833 | /* |
| 1834 | * process_issue_queue_running is cleared in process_issue_queue |
| 1835 | * once it can't do more work, and process_issue_queue exits with |
| 1836 | * interrupts disabled. |
| 1837 | */ |
| 1838 | } |
| 1839 | local_irq_restore(flags); |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int |
| 1844 | * result) |
| 1845 | * |
| 1846 | * Purpose : mark SCSI command as finished, OR'ing the host portion |
| 1847 | * of the result word into the result field of the corresponding |
| 1848 | * Scsi_Cmnd structure, and removing it from the internal queues. |
| 1849 | * |
| 1850 | * Inputs : cmd - command, result - entire result field |
| 1851 | * |
| 1852 | * Preconditions : the NCR chip should be in a halted state when |
| 1853 | * abnormal_finished is run, since it modifies structures which |
| 1854 | * the NCR expects to have exclusive access to. |
| 1855 | */ |
| 1856 | |
| 1857 | static void |
| 1858 | abnormal_finished (struct NCR53c7x0_cmd *cmd, int result) { |
| 1859 | Scsi_Cmnd *c = cmd->cmd; |
| 1860 | struct Scsi_Host *host = c->device->host; |
| 1861 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 1862 | host->hostdata[0]; |
| 1863 | unsigned long flags; |
| 1864 | int left, found; |
| 1865 | volatile struct NCR53c7x0_cmd * linux_search; |
| 1866 | volatile struct NCR53c7x0_cmd * volatile *linux_prev; |
| 1867 | volatile u32 *ncr_prev, *ncrcurrent, ncr_search; |
| 1868 | |
| 1869 | #if 0 |
| 1870 | printk ("scsi%d: abnormal finished\n", host->host_no); |
| 1871 | #endif |
| 1872 | |
| 1873 | local_irq_save(flags); |
| 1874 | found = 0; |
| 1875 | /* |
| 1876 | * Traverse the NCR issue array until we find a match or run out |
| 1877 | * of instructions. Instructions in the NCR issue array are |
| 1878 | * either JUMP or NOP instructions, which are 2 words in length. |
| 1879 | */ |
| 1880 | |
| 1881 | |
| 1882 | for (found = 0, left = host->can_queue, ncrcurrent = hostdata->schedule; |
| 1883 | left > 0; --left, ncrcurrent += 2) |
| 1884 | { |
| 1885 | if (issue_to_cmd (host, hostdata, (u32 *) ncrcurrent) == cmd) |
| 1886 | { |
| 1887 | ncrcurrent[0] = hostdata->NOP_insn; |
| 1888 | ncrcurrent[1] = 0xdeadbeef; |
| 1889 | ++found; |
| 1890 | break; |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | /* |
| 1895 | * Traverse the NCR reconnect list of DSA structures until we find |
| 1896 | * a pointer to this dsa or have found too many command structures. |
| 1897 | * We let prev point at the next field of the previous element or |
| 1898 | * head of the list, so we don't do anything different for removing |
| 1899 | * the head element. |
| 1900 | */ |
| 1901 | |
| 1902 | for (left = host->can_queue, |
| 1903 | ncr_search = hostdata->reconnect_dsa_head, |
| 1904 | ncr_prev = &hostdata->reconnect_dsa_head; |
| 1905 | left >= 0 && ncr_search && |
| 1906 | ((char*)bus_to_virt(ncr_search) + hostdata->dsa_start) |
| 1907 | != (char *) cmd->dsa; |
| 1908 | ncr_prev = (u32*) ((char*)bus_to_virt(ncr_search) + |
| 1909 | hostdata->dsa_next), ncr_search = *ncr_prev, --left); |
| 1910 | |
| 1911 | if (left < 0) |
| 1912 | printk("scsi%d: loop detected in ncr reconncect list\n", |
| 1913 | host->host_no); |
| 1914 | else if (ncr_search) { |
| 1915 | if (found) |
| 1916 | printk("scsi%d: scsi %ld in ncr issue array and reconnect lists\n", |
| 1917 | host->host_no, c->pid); |
| 1918 | else { |
| 1919 | volatile u32 * next = (u32 *) |
| 1920 | ((char *)bus_to_virt(ncr_search) + hostdata->dsa_next); |
| 1921 | *ncr_prev = *next; |
| 1922 | /* If we're at the tail end of the issue queue, update that pointer too. */ |
| 1923 | found = 1; |
| 1924 | } |
| 1925 | } |
| 1926 | |
| 1927 | /* |
| 1928 | * Traverse the host running list until we find this command or discover |
| 1929 | * we have too many elements, pointing linux_prev at the next field of the |
| 1930 | * linux_previous element or head of the list, search at this element. |
| 1931 | */ |
| 1932 | |
| 1933 | for (left = host->can_queue, linux_search = hostdata->running_list, |
| 1934 | linux_prev = &hostdata->running_list; |
| 1935 | left >= 0 && linux_search && linux_search != cmd; |
| 1936 | linux_prev = &(linux_search->next), |
| 1937 | linux_search = linux_search->next, --left); |
| 1938 | |
| 1939 | if (left < 0) |
| 1940 | printk ("scsi%d: loop detected in host running list for scsi pid %ld\n", |
| 1941 | host->host_no, c->pid); |
| 1942 | else if (linux_search) { |
| 1943 | *linux_prev = linux_search->next; |
| 1944 | --hostdata->busy[c->device->id][c->device->lun]; |
| 1945 | } |
| 1946 | |
| 1947 | /* Return the NCR command structure to the free list */ |
| 1948 | cmd->next = hostdata->free; |
| 1949 | hostdata->free = cmd; |
| 1950 | c->host_scribble = NULL; |
| 1951 | |
| 1952 | /* And return */ |
| 1953 | c->result = result; |
| 1954 | c->scsi_done(c); |
| 1955 | |
| 1956 | local_irq_restore(flags); |
| 1957 | run_process_issue_queue(); |
| 1958 | } |
| 1959 | |
| 1960 | /* |
| 1961 | * Function : static void intr_break (struct Scsi_Host *host, |
| 1962 | * struct NCR53c7x0_cmd *cmd) |
| 1963 | * |
| 1964 | * Purpose : Handler for breakpoint interrupts from a SCSI script |
| 1965 | * |
| 1966 | * Inputs : host - pointer to this host adapter's structure, |
| 1967 | * cmd - pointer to the command (if any) dsa was pointing |
| 1968 | * to. |
| 1969 | * |
| 1970 | */ |
| 1971 | |
| 1972 | static void |
| 1973 | intr_break (struct Scsi_Host *host, struct |
| 1974 | NCR53c7x0_cmd *cmd) { |
| 1975 | NCR53c7x0_local_declare(); |
| 1976 | struct NCR53c7x0_break *bp; |
| 1977 | #if 0 |
| 1978 | Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; |
| 1979 | #endif |
| 1980 | u32 *dsp; |
| 1981 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 1982 | host->hostdata[0]; |
| 1983 | unsigned long flags; |
| 1984 | NCR53c7x0_local_setup(host); |
| 1985 | |
| 1986 | /* |
| 1987 | * Find the break point corresponding to this address, and |
| 1988 | * dump the appropriate debugging information to standard |
| 1989 | * output. |
| 1990 | */ |
| 1991 | local_irq_save(flags); |
| 1992 | dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); |
| 1993 | for (bp = hostdata->breakpoints; bp && bp->address != dsp; |
| 1994 | bp = bp->next); |
| 1995 | if (!bp) |
| 1996 | panic("scsi%d : break point interrupt from %p with no breakpoint!", |
| 1997 | host->host_no, dsp); |
| 1998 | |
| 1999 | /* |
| 2000 | * Configure the NCR chip for manual start mode, so that we can |
| 2001 | * point the DSP register at the instruction that follows the |
| 2002 | * INT int_debug_break instruction. |
| 2003 | */ |
| 2004 | |
| 2005 | NCR53c7x0_write8 (hostdata->dmode, |
| 2006 | NCR53c7x0_read8(hostdata->dmode)|DMODE_MAN); |
| 2007 | |
| 2008 | /* |
| 2009 | * And update the DSP register, using the size of the old |
| 2010 | * instruction in bytes. |
| 2011 | */ |
| 2012 | |
| 2013 | local_irq_restore(flags); |
| 2014 | } |
| 2015 | /* |
| 2016 | * Function : static void print_synchronous (const char *prefix, |
| 2017 | * const unsigned char *msg) |
| 2018 | * |
| 2019 | * Purpose : print a pretty, user and machine parsable representation |
| 2020 | * of a SDTR message, including the "real" parameters, data |
| 2021 | * clock so we can tell transfer rate at a glance. |
| 2022 | * |
| 2023 | * Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes) |
| 2024 | */ |
| 2025 | |
| 2026 | static void |
| 2027 | print_synchronous (const char *prefix, const unsigned char *msg) { |
| 2028 | if (msg[4]) { |
| 2029 | int Hz = 1000000000 / (msg[3] * 4); |
| 2030 | int integer = Hz / 1000000; |
| 2031 | int fraction = (Hz - (integer * 1000000)) / 10000; |
| 2032 | printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n", |
| 2033 | prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction, |
| 2034 | (((msg[3] * 4) < 200) ? "FAST" : "synchronous"), |
| 2035 | (((msg[3] * 4) < 200) ? "-II" : "")); |
| 2036 | } else |
| 2037 | printk ("%sasynchronous SCSI\n", prefix); |
| 2038 | } |
| 2039 | |
| 2040 | /* |
| 2041 | * Function : static void set_synchronous (struct Scsi_Host *host, |
| 2042 | * int target, int sxfer, int scntl3, int now_connected) |
| 2043 | * |
| 2044 | * Purpose : reprogram transfers between the selected SCSI initiator and |
| 2045 | * target with the given register values; in the indirect |
| 2046 | * select operand, reselection script, and chip registers. |
| 2047 | * |
| 2048 | * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, |
| 2049 | * sxfer and scntl3 - NCR registers. now_connected - if non-zero, |
| 2050 | * we should reprogram the registers now too. |
| 2051 | * |
| 2052 | * NOTE: For 53c710, scntl3 is actually used for SCF bits from |
| 2053 | * SBCL, as we don't have a SCNTL3. |
| 2054 | */ |
| 2055 | |
| 2056 | static void |
| 2057 | set_synchronous (struct Scsi_Host *host, int target, int sxfer, int scntl3, |
| 2058 | int now_connected) { |
| 2059 | NCR53c7x0_local_declare(); |
| 2060 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 2061 | host->hostdata[0]; |
| 2062 | u32 *script; |
| 2063 | NCR53c7x0_local_setup(host); |
| 2064 | |
| 2065 | /* These are eight bit registers */ |
| 2066 | sxfer &= 0xff; |
| 2067 | scntl3 &= 0xff; |
| 2068 | |
| 2069 | hostdata->sync[target].sxfer_sanity = sxfer; |
| 2070 | hostdata->sync[target].scntl3_sanity = scntl3; |
| 2071 | |
| 2072 | /* |
| 2073 | * HARD CODED : synchronous script is EIGHT words long. This |
| 2074 | * must agree with 53c7.8xx.h |
| 2075 | */ |
| 2076 | |
| 2077 | if ((hostdata->chip != 700) && (hostdata->chip != 70066)) { |
| 2078 | hostdata->sync[target].select_indirect = (1 << target) << 16 | |
| 2079 | (sxfer << 8); |
| 2080 | hostdata->sync[target].sscf_710 = scntl3; |
| 2081 | |
| 2082 | script = (u32 *) hostdata->sync[target].script; |
| 2083 | |
| 2084 | /* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */ |
| 2085 | script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | |
| 2086 | DCMD_RWRI_OP_MOVE) << 24) | |
| 2087 | (SBCL_REG << 16) | (scntl3 << 8); |
| 2088 | script[1] = 0; |
| 2089 | script += 2; |
| 2090 | |
| 2091 | script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | |
| 2092 | DCMD_RWRI_OP_MOVE) << 24) | |
| 2093 | (SXFER_REG << 16) | (sxfer << 8); |
| 2094 | script[1] = 0; |
| 2095 | script += 2; |
| 2096 | |
| 2097 | #ifdef DEBUG_SYNC_INTR |
| 2098 | if (hostdata->options & OPTION_DEBUG_DISCONNECT) { |
| 2099 | script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_INT) << 24) | DBC_TCI_TRUE; |
| 2100 | script[1] = DEBUG_SYNC_INTR; |
| 2101 | script += 2; |
| 2102 | } |
| 2103 | #endif |
| 2104 | |
| 2105 | script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_RETURN) << 24) | DBC_TCI_TRUE; |
| 2106 | script[1] = 0; |
| 2107 | script += 2; |
| 2108 | } |
| 2109 | |
| 2110 | if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) |
| 2111 | printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n", |
| 2112 | host->host_no, target, sxfer, scntl3); |
| 2113 | |
| 2114 | if (now_connected) { |
| 2115 | NCR53c7x0_write8(SBCL_REG, scntl3); |
| 2116 | NCR53c7x0_write8(SXFER_REG, sxfer); |
| 2117 | } |
| 2118 | } |
| 2119 | |
| 2120 | |
| 2121 | /* |
| 2122 | * Function : static int asynchronous (struct Scsi_Host *host, int target) |
| 2123 | * |
| 2124 | * Purpose : reprogram between the selected SCSI Host adapter and target |
| 2125 | * (assumed to be currently connected) for asynchronous transfers. |
| 2126 | * |
| 2127 | * Inputs : host - SCSI host structure, target - numeric target ID. |
| 2128 | * |
| 2129 | * Preconditions : the NCR chip should be in one of the halted states |
| 2130 | */ |
| 2131 | |
| 2132 | static void |
| 2133 | asynchronous (struct Scsi_Host *host, int target) { |
| 2134 | NCR53c7x0_local_declare(); |
| 2135 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 2136 | host->hostdata[0]; |
| 2137 | NCR53c7x0_local_setup(host); |
| 2138 | set_synchronous (host, target, /* no offset */ 0, hostdata->saved_scntl3, |
| 2139 | 1); |
| 2140 | printk ("scsi%d : setting target %d to asynchronous SCSI\n", |
| 2141 | host->host_no, target); |
| 2142 | } |
| 2143 | |
| 2144 | /* |
| 2145 | * XXX - do we want to go out of our way (ie, add extra code to selection |
| 2146 | * in the NCR53c710/NCR53c720 script) to reprogram the synchronous |
| 2147 | * conversion bits, or can we be content in just setting the |
| 2148 | * sxfer bits? I chose to do so [richard@sleepie.demon.co.uk] |
| 2149 | */ |
| 2150 | |
| 2151 | /* Table for NCR53c8xx synchronous values */ |
| 2152 | |
| 2153 | /* This table is also correct for 710, allowing that scf=4 is equivalent |
| 2154 | * of SSCF=0 (ie use DCNTL, divide by 3) for a 50.01-66.00MHz clock. |
| 2155 | * For any other clock values, we cannot use entries with SCF values of |
| 2156 | * 4. I guess that for a 66MHz clock, the slowest it will set is 2MHz, |
| 2157 | * and for a 50MHz clock, the slowest will be 2.27Mhz. Should check |
| 2158 | * that a device doesn't try and negotiate sync below these limits! |
| 2159 | */ |
| 2160 | |
| 2161 | static const struct { |
| 2162 | int div; /* Total clock divisor * 10 */ |
| 2163 | unsigned char scf; /* */ |
| 2164 | unsigned char tp; /* 4 + tp = xferp divisor */ |
| 2165 | } syncs[] = { |
| 2166 | /* div scf tp div scf tp div scf tp */ |
| 2167 | { 40, 1, 0}, { 50, 1, 1}, { 60, 1, 2}, |
| 2168 | { 70, 1, 3}, { 75, 2, 1}, { 80, 1, 4}, |
| 2169 | { 90, 1, 5}, { 100, 1, 6}, { 105, 2, 3}, |
| 2170 | { 110, 1, 7}, { 120, 2, 4}, { 135, 2, 5}, |
| 2171 | { 140, 3, 3}, { 150, 2, 6}, { 160, 3, 4}, |
| 2172 | { 165, 2, 7}, { 180, 3, 5}, { 200, 3, 6}, |
| 2173 | { 210, 4, 3}, { 220, 3, 7}, { 240, 4, 4}, |
| 2174 | { 270, 4, 5}, { 300, 4, 6}, { 330, 4, 7} |
| 2175 | }; |
| 2176 | |
| 2177 | /* |
| 2178 | * Function : static void synchronous (struct Scsi_Host *host, int target, |
| 2179 | * char *msg) |
| 2180 | * |
| 2181 | * Purpose : reprogram transfers between the selected SCSI initiator and |
| 2182 | * target for synchronous SCSI transfers such that the synchronous |
| 2183 | * offset is less than that requested and period at least as long |
| 2184 | * as that requested. Also modify *msg such that it contains |
| 2185 | * an appropriate response. |
| 2186 | * |
| 2187 | * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, |
| 2188 | * msg - synchronous transfer request. |
| 2189 | */ |
| 2190 | |
| 2191 | |
| 2192 | static void |
| 2193 | synchronous (struct Scsi_Host *host, int target, char *msg) { |
| 2194 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 2195 | host->hostdata[0]; |
| 2196 | int desire, divisor, i, limit; |
| 2197 | unsigned char scntl3, sxfer; |
| 2198 | /* The diagnostic message fits on one line, even with max. width integers */ |
| 2199 | char buf[80]; |
| 2200 | |
| 2201 | /* Desired transfer clock in Hz */ |
| 2202 | desire = 1000000000L / (msg[3] * 4); |
| 2203 | /* Scale the available SCSI clock by 10 so we get tenths */ |
| 2204 | divisor = (hostdata->scsi_clock * 10) / desire; |
| 2205 | |
| 2206 | /* NCR chips can handle at most an offset of 8 */ |
| 2207 | if (msg[4] > 8) |
| 2208 | msg[4] = 8; |
| 2209 | |
| 2210 | if (hostdata->options & OPTION_DEBUG_SDTR) |
| 2211 | printk("scsi%d : optimal synchronous divisor of %d.%01d\n", |
| 2212 | host->host_no, divisor / 10, divisor % 10); |
| 2213 | |
| 2214 | limit = (sizeof(syncs) / sizeof(syncs[0]) -1); |
| 2215 | for (i = 0; (i < limit) && (divisor > syncs[i].div); ++i); |
| 2216 | |
| 2217 | if (hostdata->options & OPTION_DEBUG_SDTR) |
| 2218 | printk("scsi%d : selected synchronous divisor of %d.%01d\n", |
| 2219 | host->host_no, syncs[i].div / 10, syncs[i].div % 10); |
| 2220 | |
| 2221 | msg[3] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div / 10 / 4); |
| 2222 | |
| 2223 | if (hostdata->options & OPTION_DEBUG_SDTR) |
| 2224 | printk("scsi%d : selected synchronous period of %dns\n", host->host_no, |
| 2225 | msg[3] * 4); |
| 2226 | |
| 2227 | scntl3 = syncs[i].scf; |
| 2228 | sxfer = (msg[4] << SXFER_MO_SHIFT) | (syncs[i].tp << 4); |
| 2229 | if (hostdata->options & OPTION_DEBUG_SDTR) |
| 2230 | printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n", |
| 2231 | host->host_no, (int) sxfer, (int) scntl3); |
| 2232 | set_synchronous (host, target, sxfer, scntl3, 1); |
| 2233 | sprintf (buf, "scsi%d : setting target %d to ", host->host_no, target); |
| 2234 | print_synchronous (buf, msg); |
| 2235 | } |
| 2236 | |
| 2237 | /* |
| 2238 | * Function : static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, |
| 2239 | * struct NCR53c7x0_cmd *cmd) |
| 2240 | * |
| 2241 | * Purpose : Handler for INT generated instructions for the |
| 2242 | * NCR53c810/820 SCSI SCRIPT |
| 2243 | * |
| 2244 | * Inputs : host - pointer to this host adapter's structure, |
| 2245 | * cmd - pointer to the command (if any) dsa was pointing |
| 2246 | * to. |
| 2247 | * |
| 2248 | */ |
| 2249 | |
| 2250 | static int |
| 2251 | NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct |
| 2252 | NCR53c7x0_cmd *cmd) { |
| 2253 | NCR53c7x0_local_declare(); |
| 2254 | int print; |
| 2255 | Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; |
| 2256 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 2257 | host->hostdata[0]; |
| 2258 | u32 dsps,*dsp; /* Argument of the INT instruction */ |
| 2259 | |
| 2260 | NCR53c7x0_local_setup(host); |
| 2261 | dsps = NCR53c7x0_read32(DSPS_REG); |
| 2262 | dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); |
| 2263 | |
| 2264 | /* RGH 150597: Frig. Commands which fail with Check Condition are |
| 2265 | * Flagged as successful - hack dsps to indicate check condition */ |
| 2266 | #if 0 |
| 2267 | /* RGH 200597: Need to disable for BVME6000, as it gets Check Conditions |
| 2268 | * and then dies. Seems to handle Check Condition at startup, but |
| 2269 | * not mid kernel build. */ |
| 2270 | if (dsps == A_int_norm_emulateintfly && cmd && cmd->result == 2) |
| 2271 | dsps = A_int_err_check_condition; |
| 2272 | #endif |
| 2273 | |
| 2274 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 2275 | printk ("scsi%d : DSPS = 0x%x\n", host->host_no, dsps); |
| 2276 | |
| 2277 | switch (dsps) { |
| 2278 | case A_int_msg_1: |
| 2279 | print = 1; |
| 2280 | switch (hostdata->msg_buf[0]) { |
| 2281 | /* |
| 2282 | * Unless we've initiated synchronous negotiation, I don't |
| 2283 | * think that this should happen. |
| 2284 | */ |
| 2285 | case MESSAGE_REJECT: |
| 2286 | hostdata->dsp = hostdata->script + hostdata->E_accept_message / |
| 2287 | sizeof(u32); |
| 2288 | hostdata->dsp_changed = 1; |
| 2289 | if (cmd && (cmd->flags & CMD_FLAG_SDTR)) { |
| 2290 | printk ("scsi%d : target %d rejected SDTR\n", host->host_no, |
| 2291 | c->device->id); |
| 2292 | cmd->flags &= ~CMD_FLAG_SDTR; |
| 2293 | asynchronous (host, c->device->id); |
| 2294 | print = 0; |
| 2295 | } |
| 2296 | break; |
| 2297 | case INITIATE_RECOVERY: |
| 2298 | printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n", |
| 2299 | host->host_no); |
| 2300 | /* Fall through to default */ |
| 2301 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / |
| 2302 | sizeof(u32); |
| 2303 | hostdata->dsp_changed = 1; |
| 2304 | break; |
| 2305 | default: |
| 2306 | printk ("scsi%d : unsupported message, rejecting\n", |
| 2307 | host->host_no); |
| 2308 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / |
| 2309 | sizeof(u32); |
| 2310 | hostdata->dsp_changed = 1; |
| 2311 | } |
| 2312 | if (print) { |
| 2313 | printk ("scsi%d : received message", host->host_no); |
| 2314 | if (c) |
| 2315 | printk (" from target %d lun %d ", c->device->id, c->device->lun); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 2316 | scsi_print_msg ((unsigned char *) hostdata->msg_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | printk("\n"); |
| 2318 | } |
| 2319 | |
| 2320 | return SPECIFIC_INT_NOTHING; |
| 2321 | |
| 2322 | |
| 2323 | case A_int_msg_sdtr: |
| 2324 | /* |
| 2325 | * At this point, hostdata->msg_buf contains |
| 2326 | * 0 EXTENDED MESSAGE |
| 2327 | * 1 length |
| 2328 | * 2 SDTR |
| 2329 | * 3 period * 4ns |
| 2330 | * 4 offset |
| 2331 | */ |
| 2332 | |
| 2333 | if (cmd) { |
| 2334 | char buf[80]; |
| 2335 | sprintf (buf, "scsi%d : target %d %s ", host->host_no, c->device->id, |
| 2336 | (cmd->flags & CMD_FLAG_SDTR) ? "accepting" : "requesting"); |
| 2337 | print_synchronous (buf, (unsigned char *) hostdata->msg_buf); |
| 2338 | |
| 2339 | /* |
| 2340 | * Initiator initiated, won't happen unless synchronous |
| 2341 | * transfers are enabled. If we get a SDTR message in |
| 2342 | * response to our SDTR, we should program our parameters |
| 2343 | * such that |
| 2344 | * offset <= requested offset |
| 2345 | * period >= requested period |
| 2346 | */ |
| 2347 | if (cmd->flags & CMD_FLAG_SDTR) { |
| 2348 | cmd->flags &= ~CMD_FLAG_SDTR; |
| 2349 | if (hostdata->msg_buf[4]) |
| 2350 | synchronous (host, c->device->id, (unsigned char *) |
| 2351 | hostdata->msg_buf); |
| 2352 | else |
| 2353 | asynchronous (host, c->device->id); |
| 2354 | hostdata->dsp = hostdata->script + hostdata->E_accept_message / |
| 2355 | sizeof(u32); |
| 2356 | hostdata->dsp_changed = 1; |
| 2357 | return SPECIFIC_INT_NOTHING; |
| 2358 | } else { |
| 2359 | if (hostdata->options & OPTION_SYNCHRONOUS) { |
| 2360 | cmd->flags |= CMD_FLAG_DID_SDTR; |
| 2361 | synchronous (host, c->device->id, (unsigned char *) |
| 2362 | hostdata->msg_buf); |
| 2363 | } else { |
| 2364 | hostdata->msg_buf[4] = 0; /* 0 offset = async */ |
| 2365 | asynchronous (host, c->device->id); |
| 2366 | } |
| 2367 | patch_dsa_32 (cmd->dsa, dsa_msgout_other, 0, 5); |
| 2368 | patch_dsa_32 (cmd->dsa, dsa_msgout_other, 1, (u32) |
| 2369 | virt_to_bus ((void *)&hostdata->msg_buf)); |
| 2370 | hostdata->dsp = hostdata->script + |
| 2371 | hostdata->E_respond_message / sizeof(u32); |
| 2372 | hostdata->dsp_changed = 1; |
| 2373 | } |
| 2374 | return SPECIFIC_INT_NOTHING; |
| 2375 | } |
| 2376 | /* Fall through to abort if we couldn't find a cmd, and |
| 2377 | therefore a dsa structure to twiddle */ |
| 2378 | case A_int_msg_wdtr: |
| 2379 | hostdata->dsp = hostdata->script + hostdata->E_reject_message / |
| 2380 | sizeof(u32); |
| 2381 | hostdata->dsp_changed = 1; |
| 2382 | return SPECIFIC_INT_NOTHING; |
| 2383 | case A_int_err_unexpected_phase: |
| 2384 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 2385 | printk ("scsi%d : unexpected phase\n", host->host_no); |
| 2386 | return SPECIFIC_INT_ABORT; |
| 2387 | case A_int_err_selected: |
| 2388 | if ((hostdata->chip / 100) == 8) |
| 2389 | printk ("scsi%d : selected by target %d\n", host->host_no, |
| 2390 | (int) NCR53c7x0_read8(SDID_REG_800) &7); |
| 2391 | else |
| 2392 | printk ("scsi%d : selected by target LCRC=0x%02x\n", host->host_no, |
| 2393 | (int) NCR53c7x0_read8(LCRC_REG_10)); |
| 2394 | hostdata->dsp = hostdata->script + hostdata->E_target_abort / |
| 2395 | sizeof(u32); |
| 2396 | hostdata->dsp_changed = 1; |
| 2397 | return SPECIFIC_INT_NOTHING; |
| 2398 | case A_int_err_unexpected_reselect: |
| 2399 | if ((hostdata->chip / 100) == 8) |
| 2400 | printk ("scsi%d : unexpected reselect by target %d lun %d\n", |
| 2401 | host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7, |
| 2402 | hostdata->reselected_identify & 7); |
| 2403 | else |
| 2404 | printk ("scsi%d : unexpected reselect LCRC=0x%02x\n", host->host_no, |
| 2405 | (int) NCR53c7x0_read8(LCRC_REG_10)); |
| 2406 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / |
| 2407 | sizeof(u32); |
| 2408 | hostdata->dsp_changed = 1; |
| 2409 | return SPECIFIC_INT_NOTHING; |
| 2410 | /* |
| 2411 | * Since contingent allegiance conditions are cleared by the next |
| 2412 | * command issued to a target, we must issue a REQUEST SENSE |
| 2413 | * command after receiving a CHECK CONDITION status, before |
| 2414 | * another command is issued. |
| 2415 | * |
| 2416 | * Since this NCR53c7x0_cmd will be freed after use, we don't |
| 2417 | * care if we step on the various fields, so modify a few things. |
| 2418 | */ |
| 2419 | case A_int_err_check_condition: |
| 2420 | #if 0 |
| 2421 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 2422 | #endif |
| 2423 | printk ("scsi%d : CHECK CONDITION\n", host->host_no); |
| 2424 | if (!c) { |
| 2425 | printk("scsi%d : CHECK CONDITION with no SCSI command\n", |
| 2426 | host->host_no); |
| 2427 | return SPECIFIC_INT_PANIC; |
| 2428 | } |
| 2429 | |
| 2430 | /* |
| 2431 | * FIXME : this uses the normal one-byte selection message. |
| 2432 | * We may want to renegotiate for synchronous & WIDE transfers |
| 2433 | * since these could be the crux of our problem. |
| 2434 | * |
| 2435 | hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll |
| 2436 | * have to set this up so that the rest of the DSA |
| 2437 | * agrees with this being an untagged queue'd command. |
| 2438 | */ |
| 2439 | |
| 2440 | patch_dsa_32 (cmd->dsa, dsa_msgout, 0, 1); |
| 2441 | |
| 2442 | /* |
| 2443 | * Modify the table indirect for COMMAND OUT phase, since |
| 2444 | * Request Sense is a six byte command. |
| 2445 | */ |
| 2446 | |
| 2447 | patch_dsa_32 (cmd->dsa, dsa_cmdout, 0, 6); |
| 2448 | |
| 2449 | /* |
| 2450 | * The CDB is now mirrored in our local non-cached |
| 2451 | * structure, but keep the old structure up to date as well, |
| 2452 | * just in case anyone looks at it. |
| 2453 | */ |
| 2454 | |
| 2455 | /* |
| 2456 | * XXX Need to worry about data buffer alignment/cache state |
| 2457 | * XXX here, but currently never get A_int_err_check_condition, |
| 2458 | * XXX so ignore problem for now. |
| 2459 | */ |
| 2460 | cmd->cmnd[0] = c->cmnd[0] = REQUEST_SENSE; |
| 2461 | cmd->cmnd[0] = c->cmnd[1] &= 0xe0; /* Zero all but LUN */ |
| 2462 | cmd->cmnd[0] = c->cmnd[2] = 0; |
| 2463 | cmd->cmnd[0] = c->cmnd[3] = 0; |
| 2464 | cmd->cmnd[0] = c->cmnd[4] = sizeof(c->sense_buffer); |
| 2465 | cmd->cmnd[0] = c->cmnd[5] = 0; |
| 2466 | |
| 2467 | /* |
| 2468 | * Disable dataout phase, and program datain to transfer to the |
| 2469 | * sense buffer, and add a jump to other_transfer after the |
| 2470 | * command so overflow/underrun conditions are detected. |
| 2471 | */ |
| 2472 | |
| 2473 | patch_dsa_32 (cmd->dsa, dsa_dataout, 0, |
| 2474 | virt_to_bus(hostdata->script) + hostdata->E_other_transfer); |
| 2475 | patch_dsa_32 (cmd->dsa, dsa_datain, 0, |
| 2476 | virt_to_bus(cmd->data_transfer_start)); |
| 2477 | cmd->data_transfer_start[0] = (((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | |
| 2478 | DCMD_BMI_IO)) << 24) | sizeof(c->sense_buffer); |
| 2479 | cmd->data_transfer_start[1] = (u32) virt_to_bus(c->sense_buffer); |
| 2480 | |
| 2481 | cmd->data_transfer_start[2] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) |
| 2482 | << 24) | DBC_TCI_TRUE; |
| 2483 | cmd->data_transfer_start[3] = (u32) virt_to_bus(hostdata->script) + |
| 2484 | hostdata->E_other_transfer; |
| 2485 | |
| 2486 | /* |
| 2487 | * Currently, this command is flagged as completed, ie |
| 2488 | * it has valid status and message data. Reflag it as |
| 2489 | * incomplete. Q - need to do something so that original |
| 2490 | * status, etc are used. |
| 2491 | */ |
| 2492 | |
| 2493 | cmd->result = cmd->cmd->result = 0xffff; |
| 2494 | |
| 2495 | /* |
| 2496 | * Restart command as a REQUEST SENSE. |
| 2497 | */ |
| 2498 | hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select / |
| 2499 | sizeof(u32); |
| 2500 | hostdata->dsp_changed = 1; |
| 2501 | return SPECIFIC_INT_NOTHING; |
| 2502 | case A_int_debug_break: |
| 2503 | return SPECIFIC_INT_BREAK; |
| 2504 | case A_int_norm_aborted: |
| 2505 | hostdata->dsp = (u32 *) hostdata->schedule; |
| 2506 | hostdata->dsp_changed = 1; |
| 2507 | if (cmd) |
| 2508 | abnormal_finished (cmd, DID_ERROR << 16); |
| 2509 | return SPECIFIC_INT_NOTHING; |
| 2510 | case A_int_norm_emulateintfly: |
| 2511 | NCR53c7x0_intfly(host); |
| 2512 | return SPECIFIC_INT_NOTHING; |
| 2513 | case A_int_test_1: |
| 2514 | case A_int_test_2: |
| 2515 | hostdata->idle = 1; |
| 2516 | hostdata->test_completed = (dsps - A_int_test_1) / 0x00010000 + 1; |
| 2517 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 2518 | printk("scsi%d : test%d complete\n", host->host_no, |
| 2519 | hostdata->test_completed); |
| 2520 | return SPECIFIC_INT_NOTHING; |
| 2521 | #ifdef A_int_debug_reselected_ok |
| 2522 | case A_int_debug_reselected_ok: |
| 2523 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2524 | OPTION_DEBUG_DISCONNECT)) { |
| 2525 | /* |
| 2526 | * Note - this dsa is not based on location relative to |
| 2527 | * the command structure, but to location relative to the |
| 2528 | * DSA register |
| 2529 | */ |
| 2530 | u32 *dsa; |
| 2531 | dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); |
| 2532 | |
| 2533 | printk("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n", |
| 2534 | host->host_no, NCR53c7x0_read32(DSA_REG), dsa); |
| 2535 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", |
| 2536 | host->host_no, cmd->saved_data_pointer, |
| 2537 | bus_to_virt(cmd->saved_data_pointer)); |
| 2538 | print_insn (host, hostdata->script + Ent_reselected_ok / |
| 2539 | sizeof(u32), "", 1); |
| 2540 | if ((hostdata->chip / 100) == 8) |
| 2541 | printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", |
| 2542 | host->host_no, NCR53c7x0_read8(SXFER_REG), |
| 2543 | NCR53c7x0_read8(SCNTL3_REG_800)); |
| 2544 | else |
| 2545 | printk ("scsi%d : sxfer=0x%x, cannot read SBCL\n", |
| 2546 | host->host_no, NCR53c7x0_read8(SXFER_REG)); |
| 2547 | if (c) { |
| 2548 | print_insn (host, (u32 *) |
| 2549 | hostdata->sync[c->device->id].script, "", 1); |
| 2550 | print_insn (host, (u32 *) |
| 2551 | hostdata->sync[c->device->id].script + 2, "", 1); |
| 2552 | } |
| 2553 | } |
| 2554 | return SPECIFIC_INT_RESTART; |
| 2555 | #endif |
| 2556 | #ifdef A_int_debug_reselect_check |
| 2557 | case A_int_debug_reselect_check: |
| 2558 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2559 | u32 *dsa; |
| 2560 | #if 0 |
| 2561 | u32 *code; |
| 2562 | #endif |
| 2563 | /* |
| 2564 | * Note - this dsa is not based on location relative to |
| 2565 | * the command structure, but to location relative to the |
| 2566 | * DSA register |
| 2567 | */ |
| 2568 | dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); |
| 2569 | printk("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n", |
| 2570 | host->host_no, virt_to_bus(dsa), dsa); |
| 2571 | if (dsa) { |
| 2572 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", |
| 2573 | host->host_no, cmd->saved_data_pointer, |
| 2574 | bus_to_virt (cmd->saved_data_pointer)); |
| 2575 | #if 0 |
| 2576 | printk("scsi%d : template code :\n", host->host_no); |
| 2577 | for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero) |
| 2578 | / sizeof(u32); code < (dsa + Ent_dsa_zero / sizeof(u32)); |
| 2579 | code += print_insn (host, code, "", 1)); |
| 2580 | #endif |
| 2581 | } |
| 2582 | print_insn (host, hostdata->script + Ent_reselected_ok / |
| 2583 | sizeof(u32), "", 1); |
| 2584 | } |
| 2585 | return SPECIFIC_INT_RESTART; |
| 2586 | #endif |
| 2587 | #ifdef A_int_debug_dsa_schedule |
| 2588 | case A_int_debug_dsa_schedule: |
| 2589 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2590 | u32 *dsa; |
| 2591 | /* |
| 2592 | * Note - this dsa is not based on location relative to |
| 2593 | * the command structure, but to location relative to the |
| 2594 | * DSA register |
| 2595 | */ |
| 2596 | dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); |
| 2597 | printk("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n", |
| 2598 | host->host_no, virt_to_bus(dsa), dsa); |
| 2599 | if (dsa) |
| 2600 | printk("scsi%d : resume address is 0x%x (virt 0x%p)\n" |
| 2601 | " (temp was 0x%x (virt 0x%p))\n", |
| 2602 | host->host_no, cmd->saved_data_pointer, |
| 2603 | bus_to_virt (cmd->saved_data_pointer), |
| 2604 | NCR53c7x0_read32 (TEMP_REG), |
| 2605 | bus_to_virt (NCR53c7x0_read32(TEMP_REG))); |
| 2606 | } |
| 2607 | return SPECIFIC_INT_RESTART; |
| 2608 | #endif |
| 2609 | #ifdef A_int_debug_scheduled |
| 2610 | case A_int_debug_scheduled: |
| 2611 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2612 | printk("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n", |
| 2613 | host->host_no, NCR53c7x0_read32(DSA_REG), |
| 2614 | bus_to_virt(NCR53c7x0_read32(DSA_REG))); |
| 2615 | } |
| 2616 | return SPECIFIC_INT_RESTART; |
| 2617 | #endif |
| 2618 | #ifdef A_int_debug_idle |
| 2619 | case A_int_debug_idle: |
| 2620 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2621 | printk("scsi%d : idle\n", host->host_no); |
| 2622 | } |
| 2623 | return SPECIFIC_INT_RESTART; |
| 2624 | #endif |
| 2625 | #ifdef A_int_debug_cmd |
| 2626 | case A_int_debug_cmd: |
| 2627 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2628 | printk("scsi%d : command sent\n"); |
| 2629 | } |
| 2630 | return SPECIFIC_INT_RESTART; |
| 2631 | #endif |
| 2632 | #ifdef A_int_debug_dsa_loaded |
| 2633 | case A_int_debug_dsa_loaded: |
| 2634 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2635 | printk("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n", host->host_no, |
| 2636 | NCR53c7x0_read32(DSA_REG), |
| 2637 | bus_to_virt(NCR53c7x0_read32(DSA_REG))); |
| 2638 | } |
| 2639 | return SPECIFIC_INT_RESTART; |
| 2640 | #endif |
| 2641 | #ifdef A_int_debug_reselected |
| 2642 | case A_int_debug_reselected: |
| 2643 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2644 | OPTION_DEBUG_DISCONNECT)) { |
| 2645 | if ((hostdata->chip / 100) == 8) |
| 2646 | printk("scsi%d : reselected by target %d lun %d\n", |
| 2647 | host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & ~0x80, |
| 2648 | (int) hostdata->reselected_identify & 7); |
| 2649 | else |
| 2650 | printk("scsi%d : reselected by LCRC=0x%02x lun %d\n", |
| 2651 | host->host_no, (int) NCR53c7x0_read8(LCRC_REG_10), |
| 2652 | (int) hostdata->reselected_identify & 7); |
| 2653 | print_queues(host); |
| 2654 | } |
| 2655 | return SPECIFIC_INT_RESTART; |
| 2656 | #endif |
| 2657 | #ifdef A_int_debug_disconnect_msg |
| 2658 | case A_int_debug_disconnect_msg: |
| 2659 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { |
| 2660 | if (c) |
| 2661 | printk("scsi%d : target %d lun %d disconnecting\n", |
| 2662 | host->host_no, c->device->id, c->device->lun); |
| 2663 | else |
| 2664 | printk("scsi%d : unknown target disconnecting\n", |
| 2665 | host->host_no); |
| 2666 | } |
| 2667 | return SPECIFIC_INT_RESTART; |
| 2668 | #endif |
| 2669 | #ifdef A_int_debug_disconnected |
| 2670 | case A_int_debug_disconnected: |
| 2671 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2672 | OPTION_DEBUG_DISCONNECT)) { |
| 2673 | printk ("scsi%d : disconnected, new queues are\n", |
| 2674 | host->host_no); |
| 2675 | print_queues(host); |
| 2676 | #if 0 |
| 2677 | /* Not valid on ncr53c710! */ |
| 2678 | printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", |
| 2679 | host->host_no, NCR53c7x0_read8(SXFER_REG), |
| 2680 | NCR53c7x0_read8(SCNTL3_REG_800)); |
| 2681 | #endif |
| 2682 | if (c) { |
| 2683 | print_insn (host, (u32 *) |
| 2684 | hostdata->sync[c->device->id].script, "", 1); |
| 2685 | print_insn (host, (u32 *) |
| 2686 | hostdata->sync[c->device->id].script + 2, "", 1); |
| 2687 | } |
| 2688 | } |
| 2689 | return SPECIFIC_INT_RESTART; |
| 2690 | #endif |
| 2691 | #ifdef A_int_debug_panic |
| 2692 | case A_int_debug_panic: |
| 2693 | printk("scsi%d : int_debug_panic received\n", host->host_no); |
| 2694 | print_lots (host); |
| 2695 | return SPECIFIC_INT_PANIC; |
| 2696 | #endif |
| 2697 | #ifdef A_int_debug_saved |
| 2698 | case A_int_debug_saved: |
| 2699 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2700 | OPTION_DEBUG_DISCONNECT)) { |
| 2701 | printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n", |
| 2702 | host->host_no, cmd->saved_data_pointer, |
| 2703 | bus_to_virt (cmd->saved_data_pointer)); |
| 2704 | print_progress (c); |
| 2705 | } |
| 2706 | return SPECIFIC_INT_RESTART; |
| 2707 | #endif |
| 2708 | #ifdef A_int_debug_restored |
| 2709 | case A_int_debug_restored: |
| 2710 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2711 | OPTION_DEBUG_DISCONNECT)) { |
| 2712 | if (cmd) { |
| 2713 | int size; |
| 2714 | printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n", |
| 2715 | host->host_no, cmd->saved_data_pointer, bus_to_virt ( |
| 2716 | cmd->saved_data_pointer)); |
| 2717 | size = print_insn (host, (u32 *) |
| 2718 | bus_to_virt(cmd->saved_data_pointer), "", 1); |
| 2719 | size = print_insn (host, (u32 *) |
| 2720 | bus_to_virt(cmd->saved_data_pointer) + size, "", 1); |
| 2721 | print_progress (c); |
| 2722 | } |
| 2723 | #if 0 |
| 2724 | printk ("scsi%d : datapath residual %d\n", |
| 2725 | host->host_no, datapath_residual (host)) ; |
| 2726 | #endif |
| 2727 | } |
| 2728 | return SPECIFIC_INT_RESTART; |
| 2729 | #endif |
| 2730 | #ifdef A_int_debug_sync |
| 2731 | case A_int_debug_sync: |
| 2732 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2733 | OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { |
| 2734 | unsigned char sxfer = NCR53c7x0_read8 (SXFER_REG), scntl3; |
| 2735 | if ((hostdata->chip / 100) == 8) { |
| 2736 | scntl3 = NCR53c7x0_read8 (SCNTL3_REG_800); |
| 2737 | if (c) { |
| 2738 | if (sxfer != hostdata->sync[c->device->id].sxfer_sanity || |
| 2739 | scntl3 != hostdata->sync[c->device->id].scntl3_sanity) { |
| 2740 | printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x", |
| 2741 | host->host_no, sxfer, scntl3); |
| 2742 | NCR53c7x0_write8 (SXFER_REG, sxfer); |
| 2743 | NCR53c7x0_write8 (SCNTL3_REG_800, scntl3); |
| 2744 | } |
| 2745 | } else |
| 2746 | printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n", |
| 2747 | host->host_no, (int) sxfer, (int) scntl3); |
| 2748 | } else { |
| 2749 | if (c) { |
| 2750 | if (sxfer != hostdata->sync[c->device->id].sxfer_sanity) { |
| 2751 | printk ("scsi%d : sync sanity check failed sxfer=0x%x", |
| 2752 | host->host_no, sxfer); |
| 2753 | NCR53c7x0_write8 (SXFER_REG, sxfer); |
| 2754 | NCR53c7x0_write8 (SBCL_REG, |
| 2755 | hostdata->sync[c->device->id].sscf_710); |
| 2756 | } |
| 2757 | } else |
| 2758 | printk ("scsi%d : unknown command sxfer=0x%x\n", |
| 2759 | host->host_no, (int) sxfer); |
| 2760 | } |
| 2761 | } |
| 2762 | return SPECIFIC_INT_RESTART; |
| 2763 | #endif |
| 2764 | #ifdef A_int_debug_datain |
| 2765 | case A_int_debug_datain: |
| 2766 | if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| |
| 2767 | OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { |
| 2768 | int size; |
| 2769 | if ((hostdata->chip / 100) == 8) |
| 2770 | printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n" |
| 2771 | " datapath residual=%d\n", |
| 2772 | host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), |
| 2773 | (int) NCR53c7x0_read8(SXFER_REG), |
| 2774 | (int) NCR53c7x0_read8(SCNTL3_REG_800), |
| 2775 | datapath_residual (host)) ; |
| 2776 | else |
| 2777 | printk ("scsi%d : In do_datain (%s) sxfer=0x%x\n" |
| 2778 | " datapath residual=%d\n", |
| 2779 | host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), |
| 2780 | (int) NCR53c7x0_read8(SXFER_REG), |
| 2781 | datapath_residual (host)) ; |
| 2782 | print_insn (host, dsp, "", 1); |
| 2783 | size = print_insn (host, (u32 *) bus_to_virt(dsp[1]), "", 1); |
| 2784 | print_insn (host, (u32 *) bus_to_virt(dsp[1]) + size, "", 1); |
| 2785 | } |
| 2786 | return SPECIFIC_INT_RESTART; |
| 2787 | #endif |
| 2788 | #ifdef A_int_debug_check_dsa |
| 2789 | case A_int_debug_check_dsa: |
| 2790 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { |
| 2791 | int sdid; |
| 2792 | int tmp; |
| 2793 | char *where; |
| 2794 | if (hostdata->chip / 100 == 8) |
| 2795 | sdid = NCR53c7x0_read8 (SDID_REG_800) & 15; |
| 2796 | else { |
| 2797 | tmp = NCR53c7x0_read8 (SDID_REG_700); |
| 2798 | if (!tmp) |
| 2799 | panic ("SDID_REG_700 = 0"); |
| 2800 | tmp >>= 1; |
| 2801 | sdid = 0; |
| 2802 | while (tmp) { |
| 2803 | tmp >>= 1; |
| 2804 | sdid++; |
| 2805 | } |
| 2806 | } |
| 2807 | where = dsp - NCR53c7x0_insn_size(NCR53c7x0_read8 |
| 2808 | (DCMD_REG)) == hostdata->script + |
| 2809 | Ent_select_check_dsa / sizeof(u32) ? |
| 2810 | "selection" : "reselection"; |
| 2811 | if (c && sdid != c->device->id) { |
| 2812 | printk ("scsi%d : SDID target %d != DSA target %d at %s\n", |
| 2813 | host->host_no, sdid, c->device->id, where); |
| 2814 | print_lots(host); |
| 2815 | dump_events (host, 20); |
| 2816 | return SPECIFIC_INT_PANIC; |
| 2817 | } |
| 2818 | } |
| 2819 | return SPECIFIC_INT_RESTART; |
| 2820 | #endif |
| 2821 | default: |
| 2822 | if ((dsps & 0xff000000) == 0x03000000) { |
| 2823 | printk ("scsi%d : misc debug interrupt 0x%x\n", |
| 2824 | host->host_no, dsps); |
| 2825 | return SPECIFIC_INT_RESTART; |
| 2826 | } else if ((dsps & 0xff000000) == 0x05000000) { |
| 2827 | if (hostdata->events) { |
| 2828 | struct NCR53c7x0_event *event; |
| 2829 | ++hostdata->event_index; |
| 2830 | if (hostdata->event_index >= hostdata->event_size) |
| 2831 | hostdata->event_index = 0; |
| 2832 | event = (struct NCR53c7x0_event *) hostdata->events + |
| 2833 | hostdata->event_index; |
| 2834 | event->event = (enum ncr_event) dsps; |
| 2835 | event->dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); |
| 2836 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { |
| 2837 | if (hostdata->chip / 100 == 8) |
| 2838 | event->target = NCR53c7x0_read8(SSID_REG_800); |
| 2839 | else { |
| 2840 | unsigned char tmp, sdid; |
| 2841 | tmp = NCR53c7x0_read8 (SDID_REG_700); |
| 2842 | if (!tmp) |
| 2843 | panic ("SDID_REG_700 = 0"); |
| 2844 | tmp >>= 1; |
| 2845 | sdid = 0; |
| 2846 | while (tmp) { |
| 2847 | tmp >>= 1; |
| 2848 | sdid++; |
| 2849 | } |
| 2850 | event->target = sdid; |
| 2851 | } |
| 2852 | } |
| 2853 | else |
| 2854 | event->target = 255; |
| 2855 | |
| 2856 | if (event->event == EVENT_RESELECT) |
| 2857 | event->lun = hostdata->reselected_identify & 0xf; |
| 2858 | else if (c) |
| 2859 | event->lun = c->device->lun; |
| 2860 | else |
| 2861 | event->lun = 255; |
| 2862 | do_gettimeofday(&(event->time)); |
| 2863 | if (c) { |
| 2864 | event->pid = c->pid; |
| 2865 | memcpy ((void *) event->cmnd, (void *) c->cmnd, |
| 2866 | sizeof (event->cmnd)); |
| 2867 | } else { |
| 2868 | event->pid = -1; |
| 2869 | } |
| 2870 | } |
| 2871 | return SPECIFIC_INT_RESTART; |
| 2872 | } |
| 2873 | |
| 2874 | printk ("scsi%d : unknown user interrupt 0x%x\n", |
| 2875 | host->host_no, (unsigned) dsps); |
| 2876 | return SPECIFIC_INT_PANIC; |
| 2877 | } |
| 2878 | } |
| 2879 | |
| 2880 | /* |
| 2881 | * XXX - the stock NCR assembler won't output the scriptu.h file, |
| 2882 | * which undefine's all #define'd CPP symbols from the script.h |
| 2883 | * file, which will create problems if you use multiple scripts |
| 2884 | * with the same symbol names. |
| 2885 | * |
| 2886 | * If you insist on using NCR's assembler, you could generate |
| 2887 | * scriptu.h from script.h using something like |
| 2888 | * |
| 2889 | * grep #define script.h | \ |
| 2890 | * sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \ |
| 2891 | * > scriptu.h |
| 2892 | */ |
| 2893 | |
| 2894 | #include "53c7xx_u.h" |
| 2895 | |
| 2896 | /* XXX - add alternate script handling code here */ |
| 2897 | |
| 2898 | |
| 2899 | /* |
| 2900 | * Function : static void NCR537xx_soft_reset (struct Scsi_Host *host) |
| 2901 | * |
| 2902 | * Purpose : perform a soft reset of the NCR53c7xx chip |
| 2903 | * |
| 2904 | * Inputs : host - pointer to this host adapter's structure |
| 2905 | * |
| 2906 | * Preconditions : NCR53c7x0_init must have been called for this |
| 2907 | * host. |
| 2908 | * |
| 2909 | */ |
| 2910 | |
| 2911 | static void |
| 2912 | NCR53c7x0_soft_reset (struct Scsi_Host *host) { |
| 2913 | NCR53c7x0_local_declare(); |
| 2914 | unsigned long flags; |
| 2915 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 2916 | host->hostdata[0]; |
| 2917 | NCR53c7x0_local_setup(host); |
| 2918 | |
| 2919 | local_irq_save(flags); |
| 2920 | |
| 2921 | /* Disable scsi chip and s/w level 7 ints */ |
| 2922 | |
| 2923 | #ifdef CONFIG_MVME16x |
| 2924 | if (MACH_IS_MVME16x) |
| 2925 | { |
| 2926 | volatile unsigned long v; |
| 2927 | |
| 2928 | v = *(volatile unsigned long *)0xfff4006c; |
| 2929 | v &= ~0x8000; |
| 2930 | *(volatile unsigned long *)0xfff4006c = v; |
| 2931 | v = *(volatile unsigned long *)0xfff4202c; |
| 2932 | v &= ~0x10; |
| 2933 | *(volatile unsigned long *)0xfff4202c = v; |
| 2934 | } |
| 2935 | #endif |
| 2936 | /* Anything specific for your hardware? */ |
| 2937 | |
| 2938 | /* |
| 2939 | * Do a soft reset of the chip so that everything is |
| 2940 | * reinitialized to the power-on state. |
| 2941 | * |
| 2942 | * Basically follow the procedure outlined in the NCR53c700 |
| 2943 | * data manual under Chapter Six, How to Use, Steps Necessary to |
| 2944 | * Start SCRIPTS, with the exception of actually starting the |
| 2945 | * script and setting up the synchronous transfer gunk. |
| 2946 | */ |
| 2947 | |
| 2948 | /* Should we reset the scsi bus here??????????????????? */ |
| 2949 | |
| 2950 | NCR53c7x0_write8(ISTAT_REG_700, ISTAT_10_SRST); |
| 2951 | NCR53c7x0_write8(ISTAT_REG_700, 0); |
| 2952 | |
| 2953 | /* |
| 2954 | * saved_dcntl is set up in NCR53c7x0_init() before it is overwritten |
| 2955 | * here. We should have some better way of working out the CF bit |
| 2956 | * setting.. |
| 2957 | */ |
| 2958 | |
| 2959 | hostdata->saved_dcntl = DCNTL_10_EA|DCNTL_10_COM; |
| 2960 | if (hostdata->scsi_clock > 50000000) |
| 2961 | hostdata->saved_dcntl |= DCNTL_700_CF_3; |
| 2962 | else |
| 2963 | if (hostdata->scsi_clock > 37500000) |
| 2964 | hostdata->saved_dcntl |= DCNTL_700_CF_2; |
| 2965 | #if 0 |
| 2966 | else |
| 2967 | /* Any clocks less than 37.5MHz? */ |
| 2968 | #endif |
| 2969 | |
| 2970 | if (hostdata->options & OPTION_DEBUG_TRACE) |
| 2971 | NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM); |
| 2972 | else |
| 2973 | NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl); |
| 2974 | /* Following disables snooping - snooping is not required, as non- |
| 2975 | * cached pages are used for shared data, and appropriate use is |
| 2976 | * made of cache_push/cache_clear. Indeed, for 68060 |
| 2977 | * enabling snooping causes disk corruption of ext2fs free block |
| 2978 | * bitmaps and the like. If you have a 68060 with snooping hardwared |
| 2979 | * on, then you need to enable CONFIG_060_WRITETHROUGH. |
| 2980 | */ |
| 2981 | NCR53c7x0_write8(CTEST7_REG, CTEST7_10_TT1|CTEST7_STD); |
| 2982 | /* Actually burst of eight, according to my 53c710 databook */ |
| 2983 | NCR53c7x0_write8(hostdata->dmode, DMODE_10_BL_8 | DMODE_10_FC2); |
| 2984 | NCR53c7x0_write8(SCID_REG, 1 << host->this_id); |
| 2985 | NCR53c7x0_write8(SBCL_REG, 0); |
| 2986 | NCR53c7x0_write8(SCNTL1_REG, SCNTL1_ESR_700); |
| 2987 | NCR53c7x0_write8(SCNTL0_REG, ((hostdata->options & OPTION_PARITY) ? |
| 2988 | SCNTL0_EPC : 0) | SCNTL0_EPG_700 | SCNTL0_ARB1 | SCNTL0_ARB2); |
| 2989 | |
| 2990 | /* |
| 2991 | * Enable all interrupts, except parity which we only want when |
| 2992 | * the user requests it. |
| 2993 | */ |
| 2994 | |
| 2995 | NCR53c7x0_write8(DIEN_REG, DIEN_700_BF | |
| 2996 | DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_700_OPC); |
| 2997 | |
| 2998 | NCR53c7x0_write8(SIEN_REG_700, ((hostdata->options & OPTION_PARITY) ? |
| 2999 | SIEN_PAR : 0) | SIEN_700_STO | SIEN_RST | SIEN_UDC | |
| 3000 | SIEN_SGE | SIEN_MA); |
| 3001 | |
| 3002 | #ifdef CONFIG_MVME16x |
| 3003 | if (MACH_IS_MVME16x) |
| 3004 | { |
| 3005 | volatile unsigned long v; |
| 3006 | |
| 3007 | /* Enable scsi chip and s/w level 7 ints */ |
| 3008 | v = *(volatile unsigned long *)0xfff40080; |
| 3009 | v = (v & ~(0xf << 28)) | (4 << 28); |
| 3010 | *(volatile unsigned long *)0xfff40080 = v; |
| 3011 | v = *(volatile unsigned long *)0xfff4006c; |
| 3012 | v |= 0x8000; |
| 3013 | *(volatile unsigned long *)0xfff4006c = v; |
| 3014 | v = *(volatile unsigned long *)0xfff4202c; |
| 3015 | v = (v & ~0xff) | 0x10 | 4; |
| 3016 | *(volatile unsigned long *)0xfff4202c = v; |
| 3017 | } |
| 3018 | #endif |
| 3019 | /* Anything needed for your hardware? */ |
| 3020 | local_irq_restore(flags); |
| 3021 | } |
| 3022 | |
| 3023 | |
| 3024 | /* |
| 3025 | * Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd) |
| 3026 | * |
| 3027 | * Purpose : Return the first free NCR53c7x0_cmd structure (which are |
| 3028 | * reused in a LIFO manner to minimize cache thrashing). |
| 3029 | * |
| 3030 | * Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd |
| 3031 | * structures for this device, do so. Attempt to complete all scheduled |
| 3032 | * allocations using get_zeroed_page(), putting NCR53c7x0_cmd structures on |
| 3033 | * the free list. Teach programmers not to drink and hack. |
| 3034 | * |
| 3035 | * Inputs : cmd - SCSI command |
| 3036 | * |
| 3037 | * Returns : NCR53c7x0_cmd structure allocated on behalf of cmd; |
| 3038 | * NULL on failure. |
| 3039 | */ |
| 3040 | |
| 3041 | static void |
| 3042 | my_free_page (void *addr, int dummy) |
| 3043 | { |
| 3044 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which |
| 3045 | * XXX may be invalid (CONFIG_060_WRITETHROUGH) |
| 3046 | */ |
| 3047 | kernel_set_cachemode((void *)addr, 4096, IOMAP_FULL_CACHING); |
| 3048 | free_page ((u32)addr); |
| 3049 | } |
| 3050 | |
| 3051 | static struct NCR53c7x0_cmd * |
| 3052 | allocate_cmd (Scsi_Cmnd *cmd) { |
| 3053 | struct Scsi_Host *host = cmd->device->host; |
| 3054 | struct NCR53c7x0_hostdata *hostdata = |
| 3055 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 3056 | u32 real; /* Real address */ |
| 3057 | int size; /* Size of *tmp */ |
| 3058 | struct NCR53c7x0_cmd *tmp; |
| 3059 | unsigned long flags; |
| 3060 | |
| 3061 | if (hostdata->options & OPTION_DEBUG_ALLOCATION) |
| 3062 | printk ("scsi%d : num_cmds = %d, can_queue = %d\n" |
| 3063 | " target = %d, lun = %d, %s\n", |
| 3064 | host->host_no, hostdata->num_cmds, host->can_queue, |
| 3065 | cmd->device->id, cmd->device->lun, (hostdata->cmd_allocated[cmd->device->id] & |
| 3066 | (1 << cmd->device->lun)) ? "already allocated" : "not allocated"); |
| 3067 | |
| 3068 | /* |
| 3069 | * If we have not yet reserved commands for this I_T_L nexus, and |
| 3070 | * the device exists (as indicated by permanent Scsi_Cmnd structures |
| 3071 | * being allocated under 1.3.x, or being outside of scan_scsis in |
| 3072 | * 1.2.x), do so now. |
| 3073 | */ |
| 3074 | if (!(hostdata->cmd_allocated[cmd->device->id] & (1 << cmd->device->lun)) && |
| 3075 | cmd->device && cmd->device->has_cmdblocks) { |
| 3076 | if ((hostdata->extra_allocate + hostdata->num_cmds) < host->can_queue) |
| 3077 | hostdata->extra_allocate += host->cmd_per_lun; |
| 3078 | hostdata->cmd_allocated[cmd->device->id] |= (1 << cmd->device->lun); |
| 3079 | } |
| 3080 | |
| 3081 | for (; hostdata->extra_allocate > 0 ; --hostdata->extra_allocate, |
| 3082 | ++hostdata->num_cmds) { |
| 3083 | /* historically, kmalloc has returned unaligned addresses; pad so we |
| 3084 | have enough room to ROUNDUP */ |
| 3085 | size = hostdata->max_cmd_size + sizeof (void *); |
| 3086 | #ifdef FORCE_DSA_ALIGNMENT |
| 3087 | /* |
| 3088 | * 53c710 rev.0 doesn't have an add-with-carry instruction. |
| 3089 | * Ensure we allocate enough memory to force alignment. |
| 3090 | */ |
| 3091 | size += 256; |
| 3092 | #endif |
| 3093 | /* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */ |
| 3094 | |
| 3095 | if (size > 4096) { |
| 3096 | printk (KERN_ERR "53c7xx: allocate_cmd size > 4K\n"); |
| 3097 | return NULL; |
| 3098 | } |
| 3099 | real = get_zeroed_page(GFP_ATOMIC); |
| 3100 | if (real == 0) |
| 3101 | return NULL; |
| 3102 | memset((void *)real, 0, 4096); |
| 3103 | cache_push(virt_to_phys((void *)real), 4096); |
| 3104 | cache_clear(virt_to_phys((void *)real), 4096); |
| 3105 | kernel_set_cachemode((void *)real, 4096, IOMAP_NOCACHE_SER); |
| 3106 | tmp = ROUNDUP(real, void *); |
| 3107 | #ifdef FORCE_DSA_ALIGNMENT |
| 3108 | { |
| 3109 | if (((u32)tmp & 0xff) > CmdPageStart) |
| 3110 | tmp = (struct NCR53c7x0_cmd *)((u32)tmp + 255); |
| 3111 | tmp = (struct NCR53c7x0_cmd *)(((u32)tmp & ~0xff) + CmdPageStart); |
| 3112 | #if 0 |
| 3113 | printk ("scsi: size = %d, real = 0x%08x, tmp set to 0x%08x\n", |
| 3114 | size, real, (u32)tmp); |
| 3115 | #endif |
| 3116 | } |
| 3117 | #endif |
| 3118 | tmp->real = (void *)real; |
| 3119 | tmp->size = size; |
| 3120 | tmp->free = ((void (*)(void *, int)) my_free_page); |
| 3121 | local_irq_save(flags); |
| 3122 | tmp->next = hostdata->free; |
| 3123 | hostdata->free = tmp; |
| 3124 | local_irq_restore(flags); |
| 3125 | } |
| 3126 | local_irq_save(flags); |
| 3127 | tmp = (struct NCR53c7x0_cmd *) hostdata->free; |
| 3128 | if (tmp) { |
| 3129 | hostdata->free = tmp->next; |
| 3130 | } |
| 3131 | local_irq_restore(flags); |
| 3132 | if (!tmp) |
| 3133 | printk ("scsi%d : can't allocate command for target %d lun %d\n", |
| 3134 | host->host_no, cmd->device->id, cmd->device->lun); |
| 3135 | return tmp; |
| 3136 | } |
| 3137 | |
| 3138 | /* |
| 3139 | * Function static struct NCR53c7x0_cmd *create_cmd (Scsi_Cmnd *cmd) |
| 3140 | * |
| 3141 | * |
| 3142 | * Purpose : allocate a NCR53c7x0_cmd structure, initialize it based on the |
| 3143 | * Scsi_Cmnd structure passed in cmd, including dsa and Linux field |
| 3144 | * initialization, and dsa code relocation. |
| 3145 | * |
| 3146 | * Inputs : cmd - SCSI command |
| 3147 | * |
| 3148 | * Returns : NCR53c7x0_cmd structure corresponding to cmd, |
| 3149 | * NULL on failure. |
| 3150 | */ |
| 3151 | static struct NCR53c7x0_cmd * |
| 3152 | create_cmd (Scsi_Cmnd *cmd) { |
| 3153 | NCR53c7x0_local_declare(); |
| 3154 | struct Scsi_Host *host = cmd->device->host; |
| 3155 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 3156 | host->hostdata[0]; |
| 3157 | struct NCR53c7x0_cmd *tmp; /* NCR53c7x0_cmd structure for this command */ |
| 3158 | int datain, /* Number of instructions per phase */ |
| 3159 | dataout; |
| 3160 | int data_transfer_instructions, /* Count of dynamic instructions */ |
| 3161 | i; /* Counter */ |
| 3162 | u32 *cmd_datain, /* Address of datain/dataout code */ |
| 3163 | *cmd_dataout; /* Incremented as we assemble */ |
| 3164 | #ifdef notyet |
| 3165 | unsigned char *msgptr; /* Current byte in select message */ |
| 3166 | int msglen; /* Length of whole select message */ |
| 3167 | #endif |
| 3168 | unsigned long flags; |
| 3169 | u32 exp_select_indirect; /* Used in sanity check */ |
| 3170 | NCR53c7x0_local_setup(cmd->device->host); |
| 3171 | |
| 3172 | if (!(tmp = allocate_cmd (cmd))) |
| 3173 | return NULL; |
| 3174 | |
| 3175 | /* |
| 3176 | * Copy CDB and initialised result fields from Scsi_Cmnd to NCR53c7x0_cmd. |
| 3177 | * We do this because NCR53c7x0_cmd may have a special cache mode |
| 3178 | * selected to cope with lack of bus snooping, etc. |
| 3179 | */ |
| 3180 | |
| 3181 | memcpy(tmp->cmnd, cmd->cmnd, 12); |
| 3182 | tmp->result = cmd->result; |
| 3183 | |
| 3184 | /* |
| 3185 | * Decide whether we need to generate commands for DATA IN, |
| 3186 | * DATA OUT, neither, or both based on the SCSI command |
| 3187 | */ |
| 3188 | |
| 3189 | switch (cmd->cmnd[0]) { |
| 3190 | /* These commands do DATA IN */ |
| 3191 | case INQUIRY: |
| 3192 | case MODE_SENSE: |
| 3193 | case READ_6: |
| 3194 | case READ_10: |
| 3195 | case READ_CAPACITY: |
| 3196 | case REQUEST_SENSE: |
| 3197 | case READ_BLOCK_LIMITS: |
| 3198 | case READ_TOC: |
| 3199 | datain = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; |
| 3200 | dataout = 0; |
| 3201 | break; |
| 3202 | /* These commands do DATA OUT */ |
| 3203 | case MODE_SELECT: |
| 3204 | case WRITE_6: |
| 3205 | case WRITE_10: |
| 3206 | #if 0 |
| 3207 | printk("scsi%d : command is ", host->host_no); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 3208 | __scsi_print_command(cmd->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3209 | #endif |
| 3210 | #if 0 |
| 3211 | printk ("scsi%d : %d scatter/gather segments\n", host->host_no, |
| 3212 | cmd->use_sg); |
| 3213 | #endif |
| 3214 | datain = 0; |
| 3215 | dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; |
| 3216 | #if 0 |
| 3217 | hostdata->options |= OPTION_DEBUG_INTR; |
| 3218 | #endif |
| 3219 | break; |
| 3220 | /* |
| 3221 | * These commands do no data transfer, we should force an |
| 3222 | * interrupt if a data phase is attempted on them. |
| 3223 | */ |
| 3224 | case TEST_UNIT_READY: |
| 3225 | case ALLOW_MEDIUM_REMOVAL: |
| 3226 | case START_STOP: |
| 3227 | datain = dataout = 0; |
| 3228 | break; |
| 3229 | /* |
| 3230 | * We don't know about these commands, so generate code to handle |
| 3231 | * both DATA IN and DATA OUT phases. More efficient to identify them |
| 3232 | * and add them to the above cases. |
| 3233 | */ |
| 3234 | default: |
| 3235 | printk("scsi%d : datain+dataout for command ", host->host_no); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 3236 | __scsi_print_command(cmd->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | datain = dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; |
| 3238 | } |
| 3239 | |
| 3240 | /* |
| 3241 | * New code : so that active pointers work correctly regardless |
| 3242 | * of where the saved data pointer is at, we want to immediately |
| 3243 | * enter the dynamic code after selection, and on a non-data |
| 3244 | * phase perform a CALL to the non-data phase handler, with |
| 3245 | * returns back to this address. |
| 3246 | * |
| 3247 | * If a phase mismatch is encountered in the middle of a |
| 3248 | * Block MOVE instruction, we want to _leave_ that instruction |
| 3249 | * unchanged as the current case is, modify a temporary buffer, |
| 3250 | * and point the active pointer (TEMP) at that. |
| 3251 | * |
| 3252 | * Furthermore, we want to implement a saved data pointer, |
| 3253 | * set by the SAVE_DATA_POINTERs message. |
| 3254 | * |
| 3255 | * So, the data transfer segments will change to |
| 3256 | * CALL data_transfer, WHEN NOT data phase |
| 3257 | * MOVE x, x, WHEN data phase |
| 3258 | * ( repeat ) |
| 3259 | * JUMP other_transfer |
| 3260 | */ |
| 3261 | |
| 3262 | data_transfer_instructions = datain + dataout; |
| 3263 | |
| 3264 | /* |
| 3265 | * When we perform a request sense, we overwrite various things, |
| 3266 | * including the data transfer code. Make sure we have enough |
| 3267 | * space to do that. |
| 3268 | */ |
| 3269 | |
| 3270 | if (data_transfer_instructions < 2) |
| 3271 | data_transfer_instructions = 2; |
| 3272 | |
| 3273 | |
| 3274 | /* |
| 3275 | * The saved data pointer is set up so that a RESTORE POINTERS message |
| 3276 | * will start the data transfer over at the beginning. |
| 3277 | */ |
| 3278 | |
| 3279 | tmp->saved_data_pointer = virt_to_bus (hostdata->script) + |
| 3280 | hostdata->E_data_transfer; |
| 3281 | |
| 3282 | /* |
| 3283 | * Initialize Linux specific fields. |
| 3284 | */ |
| 3285 | |
| 3286 | tmp->cmd = cmd; |
| 3287 | tmp->next = NULL; |
| 3288 | tmp->flags = 0; |
| 3289 | tmp->dsa_next_addr = virt_to_bus(tmp->dsa) + hostdata->dsa_next - |
| 3290 | hostdata->dsa_start; |
| 3291 | tmp->dsa_addr = virt_to_bus(tmp->dsa) - hostdata->dsa_start; |
| 3292 | |
| 3293 | /* |
| 3294 | * Calculate addresses of dynamic code to fill in DSA |
| 3295 | */ |
| 3296 | |
| 3297 | tmp->data_transfer_start = tmp->dsa + (hostdata->dsa_end - |
| 3298 | hostdata->dsa_start) / sizeof(u32); |
| 3299 | tmp->data_transfer_end = tmp->data_transfer_start + |
| 3300 | 2 * data_transfer_instructions; |
| 3301 | |
| 3302 | cmd_datain = datain ? tmp->data_transfer_start : NULL; |
| 3303 | cmd_dataout = dataout ? (datain ? cmd_datain + 2 * datain : tmp-> |
| 3304 | data_transfer_start) : NULL; |
| 3305 | |
| 3306 | /* |
| 3307 | * Fill in the NCR53c7x0_cmd structure as follows |
| 3308 | * dsa, with fixed up DSA code |
| 3309 | * datain code |
| 3310 | * dataout code |
| 3311 | */ |
| 3312 | |
| 3313 | /* Copy template code into dsa and perform all necessary fixups */ |
| 3314 | if (hostdata->dsa_fixup) |
| 3315 | hostdata->dsa_fixup(tmp); |
| 3316 | |
| 3317 | patch_dsa_32(tmp->dsa, dsa_next, 0, 0); |
| 3318 | /* |
| 3319 | * XXX is this giving 53c710 access to the Scsi_Cmnd in some way? |
| 3320 | * Do we need to change it for caching reasons? |
| 3321 | */ |
| 3322 | patch_dsa_32(tmp->dsa, dsa_cmnd, 0, virt_to_bus(cmd)); |
| 3323 | |
| 3324 | if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) { |
| 3325 | |
| 3326 | exp_select_indirect = ((1 << cmd->device->id) << 16) | |
| 3327 | (hostdata->sync[cmd->device->id].sxfer_sanity << 8); |
| 3328 | |
| 3329 | if (hostdata->sync[cmd->device->id].select_indirect != |
| 3330 | exp_select_indirect) { |
| 3331 | printk ("scsi%d : sanity check failed select_indirect=0x%x\n", |
| 3332 | host->host_no, hostdata->sync[cmd->device->id].select_indirect); |
| 3333 | FATAL(host); |
| 3334 | |
| 3335 | } |
| 3336 | } |
| 3337 | |
| 3338 | patch_dsa_32(tmp->dsa, dsa_select, 0, |
| 3339 | hostdata->sync[cmd->device->id].select_indirect); |
| 3340 | |
| 3341 | /* |
| 3342 | * Right now, we'll do the WIDE and SYNCHRONOUS negotiations on |
| 3343 | * different commands; although it should be trivial to do them |
| 3344 | * both at the same time. |
| 3345 | */ |
| 3346 | if (hostdata->initiate_wdtr & (1 << cmd->device->id)) { |
| 3347 | memcpy ((void *) (tmp->select + 1), (void *) wdtr_message, |
| 3348 | sizeof(wdtr_message)); |
| 3349 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(wdtr_message)); |
| 3350 | local_irq_save(flags); |
| 3351 | hostdata->initiate_wdtr &= ~(1 << cmd->device->id); |
| 3352 | local_irq_restore(flags); |
| 3353 | } else if (hostdata->initiate_sdtr & (1 << cmd->device->id)) { |
| 3354 | memcpy ((void *) (tmp->select + 1), (void *) sdtr_message, |
| 3355 | sizeof(sdtr_message)); |
| 3356 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(sdtr_message)); |
| 3357 | tmp->flags |= CMD_FLAG_SDTR; |
| 3358 | local_irq_save(flags); |
| 3359 | hostdata->initiate_sdtr &= ~(1 << cmd->device->id); |
| 3360 | local_irq_restore(flags); |
| 3361 | |
| 3362 | } |
| 3363 | #if 1 |
| 3364 | else if (!(hostdata->talked_to & (1 << cmd->device->id)) && |
| 3365 | !(hostdata->options & OPTION_NO_ASYNC)) { |
| 3366 | |
| 3367 | memcpy ((void *) (tmp->select + 1), (void *) async_message, |
| 3368 | sizeof(async_message)); |
| 3369 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(async_message)); |
| 3370 | tmp->flags |= CMD_FLAG_SDTR; |
| 3371 | } |
| 3372 | #endif |
| 3373 | else |
| 3374 | patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1); |
| 3375 | |
| 3376 | hostdata->talked_to |= (1 << cmd->device->id); |
| 3377 | tmp->select[0] = (hostdata->options & OPTION_DISCONNECT) ? |
| 3378 | IDENTIFY (1, cmd->device->lun) : IDENTIFY (0, cmd->device->lun); |
| 3379 | patch_dsa_32(tmp->dsa, dsa_msgout, 1, virt_to_bus(tmp->select)); |
| 3380 | patch_dsa_32(tmp->dsa, dsa_cmdout, 0, cmd->cmd_len); |
| 3381 | patch_dsa_32(tmp->dsa, dsa_cmdout, 1, virt_to_bus(tmp->cmnd)); |
| 3382 | patch_dsa_32(tmp->dsa, dsa_dataout, 0, cmd_dataout ? |
| 3383 | virt_to_bus (cmd_dataout) |
| 3384 | : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); |
| 3385 | patch_dsa_32(tmp->dsa, dsa_datain, 0, cmd_datain ? |
| 3386 | virt_to_bus (cmd_datain) |
| 3387 | : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); |
| 3388 | /* |
| 3389 | * XXX - need to make endian aware, should use separate variables |
| 3390 | * for both status and message bytes. |
| 3391 | */ |
| 3392 | patch_dsa_32(tmp->dsa, dsa_msgin, 0, 1); |
| 3393 | /* |
| 3394 | * FIXME : these only works for little endian. We probably want to |
| 3395 | * provide message and status fields in the NCR53c7x0_cmd |
| 3396 | * structure, and assign them to cmd->result when we're done. |
| 3397 | */ |
| 3398 | #ifdef BIG_ENDIAN |
| 3399 | patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 2); |
| 3400 | patch_dsa_32(tmp->dsa, dsa_status, 0, 1); |
| 3401 | patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result) + 3); |
| 3402 | #else |
| 3403 | patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 1); |
| 3404 | patch_dsa_32(tmp->dsa, dsa_status, 0, 1); |
| 3405 | patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result)); |
| 3406 | #endif |
| 3407 | patch_dsa_32(tmp->dsa, dsa_msgout_other, 0, 1); |
| 3408 | patch_dsa_32(tmp->dsa, dsa_msgout_other, 1, |
| 3409 | virt_to_bus(&(hostdata->NCR53c7xx_msg_nop))); |
| 3410 | |
| 3411 | /* |
| 3412 | * Generate code for zero or more of the DATA IN, DATA OUT phases |
| 3413 | * in the format |
| 3414 | * |
| 3415 | * CALL data_transfer, WHEN NOT phase |
| 3416 | * MOVE first buffer length, first buffer address, WHEN phase |
| 3417 | * ... |
| 3418 | * MOVE last buffer length, last buffer address, WHEN phase |
| 3419 | * JUMP other_transfer |
| 3420 | */ |
| 3421 | |
| 3422 | /* |
| 3423 | * See if we're getting to data transfer by generating an unconditional |
| 3424 | * interrupt. |
| 3425 | */ |
| 3426 | #if 0 |
| 3427 | if (datain) { |
| 3428 | cmd_datain[0] = 0x98080000; |
| 3429 | cmd_datain[1] = 0x03ffd00d; |
| 3430 | cmd_datain += 2; |
| 3431 | } |
| 3432 | #endif |
| 3433 | |
| 3434 | /* |
| 3435 | * XXX - I'm undecided whether all of this nonsense is faster |
| 3436 | * in the long run, or whether I should just go and implement a loop |
| 3437 | * on the NCR chip using table indirect mode? |
| 3438 | * |
| 3439 | * In any case, this is how it _must_ be done for 53c700/700-66 chips, |
| 3440 | * so this stays even when we come up with something better. |
| 3441 | * |
| 3442 | * When we're limited to 1 simultaneous command, no overlapping processing, |
| 3443 | * we're seeing 630K/sec, with 7% CPU usage on a slow Syquest 45M |
| 3444 | * drive. |
| 3445 | * |
| 3446 | * Not bad, not good. We'll see. |
| 3447 | */ |
| 3448 | |
| 3449 | tmp->bounce.len = 0; /* Assume aligned buffer */ |
| 3450 | |
| 3451 | for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; cmd_datain += 4, |
| 3452 | cmd_dataout += 4, ++i) { |
| 3453 | u32 vbuf = cmd->use_sg |
| 3454 | ? (u32)page_address(((struct scatterlist *)cmd->buffer)[i].page)+ |
| 3455 | ((struct scatterlist *)cmd->buffer)[i].offset |
| 3456 | : (u32)(cmd->request_buffer); |
| 3457 | u32 bbuf = virt_to_bus((void *)vbuf); |
| 3458 | u32 count = cmd->use_sg ? |
| 3459 | ((struct scatterlist *)cmd->buffer)[i].length : |
| 3460 | cmd->request_bufflen; |
| 3461 | |
| 3462 | /* |
| 3463 | * If we have buffers which are not aligned with 16 byte cache |
| 3464 | * lines, then we just hope nothing accesses the other parts of |
| 3465 | * those cache lines while the transfer is in progress. That would |
| 3466 | * fill the cache, and subsequent reads of the dma data would pick |
| 3467 | * up the wrong thing. |
| 3468 | * XXX We need a bounce buffer to handle that correctly. |
| 3469 | */ |
| 3470 | |
| 3471 | if (((bbuf & 15) || (count & 15)) && (datain || dataout)) |
| 3472 | { |
| 3473 | /* Bounce buffer needed */ |
| 3474 | if (cmd->use_sg) |
| 3475 | printk ("53c7xx: Non-aligned buffer with use_sg\n"); |
| 3476 | else if (datain && dataout) |
| 3477 | printk ("53c7xx: Non-aligned buffer with datain && dataout\n"); |
| 3478 | else if (count > 256) |
| 3479 | printk ("53c7xx: Non-aligned transfer > 256 bytes\n"); |
| 3480 | else |
| 3481 | { |
| 3482 | if (datain) |
| 3483 | { |
| 3484 | tmp->bounce.len = count; |
| 3485 | tmp->bounce.addr = vbuf; |
| 3486 | bbuf = virt_to_bus(tmp->bounce.buf); |
| 3487 | tmp->bounce.buf[0] = 0xff; |
| 3488 | tmp->bounce.buf[1] = 0xfe; |
| 3489 | tmp->bounce.buf[2] = 0xfd; |
| 3490 | tmp->bounce.buf[3] = 0xfc; |
| 3491 | } |
| 3492 | if (dataout) |
| 3493 | { |
| 3494 | memcpy ((void *)tmp->bounce.buf, (void *)vbuf, count); |
| 3495 | bbuf = virt_to_bus(tmp->bounce.buf); |
| 3496 | } |
| 3497 | } |
| 3498 | } |
| 3499 | |
| 3500 | if (datain) { |
| 3501 | cache_clear(virt_to_phys((void *)vbuf), count); |
| 3502 | /* CALL other_in, WHEN NOT DATA_IN */ |
| 3503 | cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | |
| 3504 | DCMD_TCI_IO) << 24) | |
| 3505 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; |
| 3506 | cmd_datain[1] = virt_to_bus (hostdata->script) + |
| 3507 | hostdata->E_other_in; |
| 3508 | /* MOVE count, buf, WHEN DATA_IN */ |
| 3509 | cmd_datain[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | DCMD_BMI_IO) |
| 3510 | << 24) | count; |
| 3511 | cmd_datain[3] = bbuf; |
| 3512 | #if 0 |
| 3513 | print_insn (host, cmd_datain, "dynamic ", 1); |
| 3514 | print_insn (host, cmd_datain + 2, "dynamic ", 1); |
| 3515 | #endif |
| 3516 | } |
| 3517 | if (dataout) { |
| 3518 | cache_push(virt_to_phys((void *)vbuf), count); |
| 3519 | /* CALL other_out, WHEN NOT DATA_OUT */ |
| 3520 | cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL) << 24) | |
| 3521 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; |
| 3522 | cmd_dataout[1] = virt_to_bus(hostdata->script) + |
| 3523 | hostdata->E_other_out; |
| 3524 | /* MOVE count, buf, WHEN DATA+OUT */ |
| 3525 | cmd_dataout[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I) << 24) |
| 3526 | | count; |
| 3527 | cmd_dataout[3] = bbuf; |
| 3528 | #if 0 |
| 3529 | print_insn (host, cmd_dataout, "dynamic ", 1); |
| 3530 | print_insn (host, cmd_dataout + 2, "dynamic ", 1); |
| 3531 | #endif |
| 3532 | } |
| 3533 | } |
| 3534 | |
| 3535 | /* |
| 3536 | * Install JUMP instructions after the data transfer routines to return |
| 3537 | * control to the do_other_transfer routines. |
| 3538 | */ |
| 3539 | |
| 3540 | |
| 3541 | if (datain) { |
| 3542 | cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | |
| 3543 | DBC_TCI_TRUE; |
| 3544 | cmd_datain[1] = virt_to_bus(hostdata->script) + |
| 3545 | hostdata->E_other_transfer; |
| 3546 | #if 0 |
| 3547 | print_insn (host, cmd_datain, "dynamic jump ", 1); |
| 3548 | #endif |
| 3549 | cmd_datain += 2; |
| 3550 | } |
| 3551 | #if 0 |
| 3552 | if (datain) { |
| 3553 | cmd_datain[0] = 0x98080000; |
| 3554 | cmd_datain[1] = 0x03ffdeed; |
| 3555 | cmd_datain += 2; |
| 3556 | } |
| 3557 | #endif |
| 3558 | if (dataout) { |
| 3559 | cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | |
| 3560 | DBC_TCI_TRUE; |
| 3561 | cmd_dataout[1] = virt_to_bus(hostdata->script) + |
| 3562 | hostdata->E_other_transfer; |
| 3563 | #if 0 |
| 3564 | print_insn (host, cmd_dataout, "dynamic jump ", 1); |
| 3565 | #endif |
| 3566 | cmd_dataout += 2; |
| 3567 | } |
| 3568 | |
| 3569 | return tmp; |
| 3570 | } |
| 3571 | |
| 3572 | /* |
| 3573 | * Function : int NCR53c7xx_queue_command (Scsi_Cmnd *cmd, |
| 3574 | * void (*done)(Scsi_Cmnd *)) |
| 3575 | * |
| 3576 | * Purpose : enqueues a SCSI command |
| 3577 | * |
| 3578 | * Inputs : cmd - SCSI command, done - function called on completion, with |
| 3579 | * a pointer to the command descriptor. |
| 3580 | * |
| 3581 | * Returns : 0 |
| 3582 | * |
| 3583 | * Side effects : |
| 3584 | * cmd is added to the per instance driver issue_queue, with major |
| 3585 | * twiddling done to the host specific fields of cmd. If the |
| 3586 | * process_issue_queue coroutine isn't running, it is restarted. |
| 3587 | * |
| 3588 | * NOTE : we use the host_scribble field of the Scsi_Cmnd structure to |
| 3589 | * hold our own data, and pervert the ptr field of the SCp field |
| 3590 | * to create a linked list. |
| 3591 | */ |
| 3592 | |
| 3593 | int |
| 3594 | NCR53c7xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *)) { |
| 3595 | struct Scsi_Host *host = cmd->device->host; |
| 3596 | struct NCR53c7x0_hostdata *hostdata = |
| 3597 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 3598 | unsigned long flags; |
| 3599 | Scsi_Cmnd *tmp; |
| 3600 | |
| 3601 | cmd->scsi_done = done; |
| 3602 | cmd->host_scribble = NULL; |
| 3603 | cmd->SCp.ptr = NULL; |
| 3604 | cmd->SCp.buffer = NULL; |
| 3605 | |
| 3606 | #ifdef VALID_IDS |
| 3607 | /* Ignore commands on invalid IDs */ |
| 3608 | if (!hostdata->valid_ids[cmd->device->id]) { |
| 3609 | printk("scsi%d : ignoring target %d lun %d\n", host->host_no, |
| 3610 | cmd->device->id, cmd->device->lun); |
| 3611 | cmd->result = (DID_BAD_TARGET << 16); |
| 3612 | done(cmd); |
| 3613 | return 0; |
| 3614 | } |
| 3615 | #endif |
| 3616 | |
| 3617 | local_irq_save(flags); |
| 3618 | if ((hostdata->options & (OPTION_DEBUG_INIT_ONLY|OPTION_DEBUG_PROBE_ONLY)) |
| 3619 | || ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && |
| 3620 | !(hostdata->debug_lun_limit[cmd->device->id] & (1 << cmd->device->lun))) |
| 3621 | #ifdef LINUX_1_2 |
| 3622 | || cmd->device->id > 7 |
| 3623 | #else |
| 3624 | || cmd->device->id > host->max_id |
| 3625 | #endif |
| 3626 | || cmd->device->id == host->this_id |
| 3627 | || hostdata->state == STATE_DISABLED) { |
| 3628 | printk("scsi%d : disabled or bad target %d lun %d\n", host->host_no, |
| 3629 | cmd->device->id, cmd->device->lun); |
| 3630 | cmd->result = (DID_BAD_TARGET << 16); |
| 3631 | done(cmd); |
| 3632 | local_irq_restore(flags); |
| 3633 | return 0; |
| 3634 | } |
| 3635 | |
| 3636 | if ((hostdata->options & OPTION_DEBUG_NCOMMANDS_LIMIT) && |
| 3637 | (hostdata->debug_count_limit == 0)) { |
| 3638 | printk("scsi%d : maximum commands exceeded\n", host->host_no); |
| 3639 | cmd->result = (DID_BAD_TARGET << 16); |
| 3640 | done(cmd); |
| 3641 | local_irq_restore(flags); |
| 3642 | return 0; |
| 3643 | } |
| 3644 | |
| 3645 | if (hostdata->options & OPTION_DEBUG_READ_ONLY) { |
| 3646 | switch (cmd->cmnd[0]) { |
| 3647 | case WRITE_6: |
| 3648 | case WRITE_10: |
| 3649 | printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", |
| 3650 | host->host_no); |
| 3651 | cmd->result = (DID_BAD_TARGET << 16); |
| 3652 | done(cmd); |
| 3653 | local_irq_restore(flags); |
| 3654 | return 0; |
| 3655 | } |
| 3656 | } |
| 3657 | |
| 3658 | if ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && |
| 3659 | hostdata->debug_count_limit != -1) |
| 3660 | --hostdata->debug_count_limit; |
| 3661 | |
| 3662 | cmd->result = 0xffff; /* The NCR will overwrite message |
| 3663 | and status with valid data */ |
| 3664 | cmd->host_scribble = (unsigned char *) tmp = create_cmd (cmd); |
| 3665 | |
| 3666 | /* |
| 3667 | * REQUEST SENSE commands are inserted at the head of the queue |
| 3668 | * so that we do not clear the contingent allegiance condition |
| 3669 | * they may be looking at. |
| 3670 | */ |
| 3671 | |
| 3672 | if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { |
| 3673 | cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue; |
| 3674 | hostdata->issue_queue = cmd; |
| 3675 | } else { |
| 3676 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->SCp.ptr; |
| 3677 | tmp = (Scsi_Cmnd *) tmp->SCp.ptr); |
| 3678 | tmp->SCp.ptr = (unsigned char *) cmd; |
| 3679 | } |
| 3680 | local_irq_restore(flags); |
| 3681 | run_process_issue_queue(); |
| 3682 | return 0; |
| 3683 | } |
| 3684 | |
| 3685 | /* |
| 3686 | * Function : void to_schedule_list (struct Scsi_Host *host, |
| 3687 | * struct NCR53c7x0_hostdata * hostdata, Scsi_Cmnd *cmd) |
| 3688 | * |
| 3689 | * Purpose : takes a SCSI command which was just removed from the |
| 3690 | * issue queue, and deals with it by inserting it in the first |
| 3691 | * free slot in the schedule list or by terminating it immediately. |
| 3692 | * |
| 3693 | * Inputs : |
| 3694 | * host - SCSI host adapter; hostdata - hostdata structure for |
| 3695 | * this adapter; cmd - a pointer to the command; should have |
| 3696 | * the host_scribble field initialized to point to a valid |
| 3697 | * |
| 3698 | * Side effects : |
| 3699 | * cmd is added to the per instance schedule list, with minor |
| 3700 | * twiddling done to the host specific fields of cmd. |
| 3701 | * |
| 3702 | */ |
| 3703 | |
| 3704 | static __inline__ void |
| 3705 | to_schedule_list (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, |
| 3706 | struct NCR53c7x0_cmd *cmd) { |
| 3707 | NCR53c7x0_local_declare(); |
| 3708 | Scsi_Cmnd *tmp = cmd->cmd; |
| 3709 | unsigned long flags; |
| 3710 | /* dsa start is negative, so subtraction is used */ |
| 3711 | volatile u32 *ncrcurrent; |
| 3712 | |
| 3713 | int i; |
| 3714 | NCR53c7x0_local_setup(host); |
| 3715 | #if 0 |
| 3716 | printk("scsi%d : new dsa is 0x%lx (virt 0x%p)\n", host->host_no, |
| 3717 | virt_to_bus(hostdata->dsa), hostdata->dsa); |
| 3718 | #endif |
| 3719 | |
| 3720 | local_irq_save(flags); |
| 3721 | |
| 3722 | /* |
| 3723 | * Work around race condition : if an interrupt fired and we |
| 3724 | * got disabled forget about this command. |
| 3725 | */ |
| 3726 | |
| 3727 | if (hostdata->state == STATE_DISABLED) { |
| 3728 | printk("scsi%d : driver disabled\n", host->host_no); |
| 3729 | tmp->result = (DID_BAD_TARGET << 16); |
| 3730 | cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; |
| 3731 | hostdata->free = cmd; |
| 3732 | tmp->scsi_done(tmp); |
| 3733 | local_irq_restore(flags); |
| 3734 | return; |
| 3735 | } |
| 3736 | |
| 3737 | for (i = host->can_queue, ncrcurrent = hostdata->schedule; |
| 3738 | i > 0 && ncrcurrent[0] != hostdata->NOP_insn; |
| 3739 | --i, ncrcurrent += 2 /* JUMP instructions are two words */); |
| 3740 | |
| 3741 | if (i > 0) { |
| 3742 | ++hostdata->busy[tmp->device->id][tmp->device->lun]; |
| 3743 | cmd->next = hostdata->running_list; |
| 3744 | hostdata->running_list = cmd; |
| 3745 | |
| 3746 | /* Restore this instruction to a NOP once the command starts */ |
| 3747 | cmd->dsa [(hostdata->dsa_jump_dest - hostdata->dsa_start) / |
| 3748 | sizeof(u32)] = (u32) virt_to_bus ((void *)ncrcurrent); |
| 3749 | /* Replace the current jump operand. */ |
| 3750 | ncrcurrent[1] = |
| 3751 | virt_to_bus ((void *) cmd->dsa) + hostdata->E_dsa_code_begin - |
| 3752 | hostdata->E_dsa_code_template; |
| 3753 | /* Replace the NOP instruction with a JUMP */ |
| 3754 | ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | |
| 3755 | DBC_TCI_TRUE; |
| 3756 | } else { |
| 3757 | printk ("scsi%d: no free slot\n", host->host_no); |
| 3758 | disable(host); |
| 3759 | tmp->result = (DID_ERROR << 16); |
| 3760 | cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; |
| 3761 | hostdata->free = cmd; |
| 3762 | tmp->scsi_done(tmp); |
| 3763 | local_irq_restore(flags); |
| 3764 | return; |
| 3765 | } |
| 3766 | |
| 3767 | /* |
| 3768 | * If the NCR chip is in an idle state, start it running the scheduler |
| 3769 | * immediately. Otherwise, signal the chip to jump to schedule as |
| 3770 | * soon as it is idle. |
| 3771 | */ |
| 3772 | |
| 3773 | if (hostdata->idle) { |
| 3774 | hostdata->idle = 0; |
| 3775 | hostdata->state = STATE_RUNNING; |
| 3776 | NCR53c7x0_write32 (DSP_REG, virt_to_bus ((void *)hostdata->schedule)); |
| 3777 | if (hostdata->options & OPTION_DEBUG_TRACE) |
| 3778 | NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | |
| 3779 | DCNTL_SSM | DCNTL_STD); |
| 3780 | } else { |
| 3781 | NCR53c7x0_write8(hostdata->istat, ISTAT_10_SIGP); |
| 3782 | } |
| 3783 | |
| 3784 | local_irq_restore(flags); |
| 3785 | } |
| 3786 | |
| 3787 | /* |
| 3788 | * Function : busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata |
| 3789 | * *hostdata, Scsi_Cmnd *cmd) |
| 3790 | * |
| 3791 | * Purpose : decide if we can pass the given SCSI command on to the |
| 3792 | * device in question or not. |
| 3793 | * |
| 3794 | * Returns : non-zero when we're busy, 0 when we aren't. |
| 3795 | */ |
| 3796 | |
| 3797 | static __inline__ int |
| 3798 | busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, |
| 3799 | Scsi_Cmnd *cmd) { |
| 3800 | /* FIXME : in the future, this needs to accommodate SCSI-II tagged |
| 3801 | queuing, and we may be able to play with fairness here a bit. |
| 3802 | */ |
| 3803 | return hostdata->busy[cmd->device->id][cmd->device->lun]; |
| 3804 | } |
| 3805 | |
| 3806 | /* |
| 3807 | * Function : process_issue_queue (void) |
| 3808 | * |
| 3809 | * Purpose : transfer commands from the issue queue to NCR start queue |
| 3810 | * of each NCR53c7/8xx in the system, avoiding kernel stack |
| 3811 | * overflows when the scsi_done() function is invoked recursively. |
| 3812 | * |
| 3813 | * NOTE : process_issue_queue exits with interrupts *disabled*, so the |
| 3814 | * caller must reenable them if it desires. |
| 3815 | * |
| 3816 | * NOTE : process_issue_queue should be called from both |
| 3817 | * NCR53c7x0_queue_command() and from the interrupt handler |
| 3818 | * after command completion in case NCR53c7x0_queue_command() |
| 3819 | * isn't invoked again but we've freed up resources that are |
| 3820 | * needed. |
| 3821 | */ |
| 3822 | |
| 3823 | static void |
| 3824 | process_issue_queue (unsigned long flags) { |
| 3825 | Scsi_Cmnd *tmp, *prev; |
| 3826 | struct Scsi_Host *host; |
| 3827 | struct NCR53c7x0_hostdata *hostdata; |
| 3828 | int done; |
| 3829 | |
| 3830 | /* |
| 3831 | * We run (with interrupts disabled) until we're sure that none of |
| 3832 | * the host adapters have anything that can be done, at which point |
| 3833 | * we set process_issue_queue_running to 0 and exit. |
| 3834 | * |
| 3835 | * Interrupts are enabled before doing various other internal |
| 3836 | * instructions, after we've decided that we need to run through |
| 3837 | * the loop again. |
| 3838 | * |
| 3839 | */ |
| 3840 | |
| 3841 | do { |
| 3842 | local_irq_disable(); /* Freeze request queues */ |
| 3843 | done = 1; |
| 3844 | for (host = first_host; host && host->hostt == the_template; |
| 3845 | host = host->next) { |
| 3846 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 3847 | local_irq_disable(); |
| 3848 | if (hostdata->issue_queue) { |
| 3849 | if (hostdata->state == STATE_DISABLED) { |
| 3850 | tmp = (Scsi_Cmnd *) hostdata->issue_queue; |
| 3851 | hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr; |
| 3852 | tmp->result = (DID_BAD_TARGET << 16); |
| 3853 | if (tmp->host_scribble) { |
| 3854 | ((struct NCR53c7x0_cmd *)tmp->host_scribble)->next = |
| 3855 | hostdata->free; |
| 3856 | hostdata->free = |
| 3857 | (struct NCR53c7x0_cmd *)tmp->host_scribble; |
| 3858 | tmp->host_scribble = NULL; |
| 3859 | } |
| 3860 | tmp->scsi_done (tmp); |
| 3861 | done = 0; |
| 3862 | } else |
| 3863 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, |
| 3864 | prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) |
| 3865 | tmp->SCp.ptr) |
| 3866 | if (!tmp->host_scribble || |
| 3867 | !busyp (host, hostdata, tmp)) { |
| 3868 | if (prev) |
| 3869 | prev->SCp.ptr = tmp->SCp.ptr; |
| 3870 | else |
| 3871 | hostdata->issue_queue = (Scsi_Cmnd *) |
| 3872 | tmp->SCp.ptr; |
| 3873 | tmp->SCp.ptr = NULL; |
| 3874 | if (tmp->host_scribble) { |
| 3875 | if (hostdata->options & OPTION_DEBUG_QUEUES) |
| 3876 | printk ("scsi%d : moving command for target %d lun %d to start list\n", |
| 3877 | host->host_no, tmp->device->id, tmp->device->lun); |
| 3878 | |
| 3879 | |
| 3880 | to_schedule_list (host, hostdata, |
| 3881 | (struct NCR53c7x0_cmd *) |
| 3882 | tmp->host_scribble); |
| 3883 | } else { |
| 3884 | if (((tmp->result & 0xff) == 0xff) || |
| 3885 | ((tmp->result & 0xff00) == 0xff00)) { |
| 3886 | printk ("scsi%d : danger Will Robinson!\n", |
| 3887 | host->host_no); |
| 3888 | tmp->result = DID_ERROR << 16; |
| 3889 | disable (host); |
| 3890 | } |
| 3891 | tmp->scsi_done(tmp); |
| 3892 | } |
| 3893 | done = 0; |
| 3894 | } /* if target/lun is not busy */ |
| 3895 | } /* if hostdata->issue_queue */ |
| 3896 | if (!done) |
| 3897 | local_irq_restore(flags); |
| 3898 | } /* for host */ |
| 3899 | } while (!done); |
| 3900 | process_issue_queue_running = 0; |
| 3901 | } |
| 3902 | |
| 3903 | /* |
| 3904 | * Function : static void intr_scsi (struct Scsi_Host *host, |
| 3905 | * struct NCR53c7x0_cmd *cmd) |
| 3906 | * |
| 3907 | * Purpose : handle all SCSI interrupts, indicated by the setting |
| 3908 | * of the SIP bit in the ISTAT register. |
| 3909 | * |
| 3910 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd |
| 3911 | * may be NULL. |
| 3912 | */ |
| 3913 | |
| 3914 | static void |
| 3915 | intr_scsi (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { |
| 3916 | NCR53c7x0_local_declare(); |
| 3917 | struct NCR53c7x0_hostdata *hostdata = |
| 3918 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 3919 | unsigned char sstat0_sist0, sist1, /* Registers */ |
| 3920 | fatal; /* Did a fatal interrupt |
| 3921 | occur ? */ |
| 3922 | |
| 3923 | NCR53c7x0_local_setup(host); |
| 3924 | |
| 3925 | fatal = 0; |
| 3926 | |
| 3927 | sstat0_sist0 = NCR53c7x0_read8(SSTAT0_REG); |
| 3928 | sist1 = 0; |
| 3929 | |
| 3930 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 3931 | printk ("scsi%d : SIST0 0x%0x, SIST1 0x%0x\n", host->host_no, |
| 3932 | sstat0_sist0, sist1); |
| 3933 | |
| 3934 | /* 250ms selection timeout */ |
| 3935 | if (sstat0_sist0 & SSTAT0_700_STO) { |
| 3936 | fatal = 1; |
| 3937 | if (hostdata->options & OPTION_DEBUG_INTR) { |
| 3938 | printk ("scsi%d : Selection Timeout\n", host->host_no); |
| 3939 | if (cmd) { |
| 3940 | printk("scsi%d : target %d, lun %d, command ", |
| 3941 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 3942 | __scsi_print_command (cmd->cmd->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | printk("scsi%d : dsp = 0x%x (virt 0x%p)\n", host->host_no, |
| 3944 | NCR53c7x0_read32(DSP_REG), |
| 3945 | bus_to_virt(NCR53c7x0_read32(DSP_REG))); |
| 3946 | } else { |
| 3947 | printk("scsi%d : no command\n", host->host_no); |
| 3948 | } |
| 3949 | } |
| 3950 | /* |
| 3951 | * XXX - question : how do we want to handle the Illegal Instruction |
| 3952 | * interrupt, which may occur before or after the Selection Timeout |
| 3953 | * interrupt? |
| 3954 | */ |
| 3955 | |
| 3956 | if (1) { |
| 3957 | hostdata->idle = 1; |
| 3958 | hostdata->expecting_sto = 0; |
| 3959 | |
| 3960 | if (hostdata->test_running) { |
| 3961 | hostdata->test_running = 0; |
| 3962 | hostdata->test_completed = 3; |
| 3963 | } else if (cmd) { |
| 3964 | abnormal_finished(cmd, DID_BAD_TARGET << 16); |
| 3965 | } |
| 3966 | #if 0 |
| 3967 | hostdata->intrs = 0; |
| 3968 | #endif |
| 3969 | } |
| 3970 | } |
| 3971 | |
| 3972 | /* |
| 3973 | * FIXME : in theory, we can also get a UDC when a STO occurs. |
| 3974 | */ |
| 3975 | if (sstat0_sist0 & SSTAT0_UDC) { |
| 3976 | fatal = 1; |
| 3977 | if (cmd) { |
| 3978 | printk("scsi%d : target %d lun %d unexpected disconnect\n", |
| 3979 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); |
| 3980 | print_lots (host); |
| 3981 | abnormal_finished(cmd, DID_ERROR << 16); |
| 3982 | } else |
| 3983 | printk("scsi%d : unexpected disconnect (no command)\n", |
| 3984 | host->host_no); |
| 3985 | |
| 3986 | hostdata->dsp = (u32 *) hostdata->schedule; |
| 3987 | hostdata->dsp_changed = 1; |
| 3988 | } |
| 3989 | |
| 3990 | /* SCSI PARITY error */ |
| 3991 | if (sstat0_sist0 & SSTAT0_PAR) { |
| 3992 | fatal = 1; |
| 3993 | if (cmd && cmd->cmd) { |
| 3994 | printk("scsi%d : target %d lun %d parity error.\n", |
| 3995 | host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); |
| 3996 | abnormal_finished (cmd, DID_PARITY << 16); |
| 3997 | } else |
| 3998 | printk("scsi%d : parity error\n", host->host_no); |
| 3999 | /* Should send message out, parity error */ |
| 4000 | |
| 4001 | /* XXX - Reduce synchronous transfer rate! */ |
| 4002 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / |
| 4003 | sizeof(u32); |
| 4004 | hostdata->dsp_changed = 1; |
| 4005 | /* SCSI GROSS error */ |
| 4006 | } |
| 4007 | |
| 4008 | if (sstat0_sist0 & SSTAT0_SGE) { |
| 4009 | fatal = 1; |
| 4010 | printk("scsi%d : gross error, saved2_dsa = 0x%x\n", host->host_no, |
| 4011 | (unsigned int)hostdata->saved2_dsa); |
| 4012 | print_lots (host); |
| 4013 | |
| 4014 | /* |
| 4015 | * A SCSI gross error may occur when we have |
| 4016 | * |
| 4017 | * - A synchronous offset which causes the SCSI FIFO to be overwritten. |
| 4018 | * |
| 4019 | * - A REQ which causes the maximum synchronous offset programmed in |
| 4020 | * the SXFER register to be exceeded. |
| 4021 | * |
| 4022 | * - A phase change with an outstanding synchronous offset. |
| 4023 | * |
| 4024 | * - Residual data in the synchronous data FIFO, with a transfer |
| 4025 | * other than a synchronous receive is started.$# |
| 4026 | */ |
| 4027 | |
| 4028 | |
| 4029 | /* XXX Should deduce synchronous transfer rate! */ |
| 4030 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / |
| 4031 | sizeof(u32); |
| 4032 | hostdata->dsp_changed = 1; |
| 4033 | /* Phase mismatch */ |
| 4034 | } |
| 4035 | |
| 4036 | if (sstat0_sist0 & SSTAT0_MA) { |
| 4037 | fatal = 1; |
| 4038 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4039 | printk ("scsi%d : SSTAT0_MA\n", host->host_no); |
| 4040 | intr_phase_mismatch (host, cmd); |
| 4041 | } |
| 4042 | |
| 4043 | #if 0 |
| 4044 | if (sstat0_sist0 & SIST0_800_RSL) |
| 4045 | printk ("scsi%d : Oh no Mr. Bill!\n", host->host_no); |
| 4046 | #endif |
| 4047 | |
| 4048 | /* |
| 4049 | * If a fatal SCSI interrupt occurs, we must insure that the DMA and |
| 4050 | * SCSI FIFOs were flushed. |
| 4051 | */ |
| 4052 | |
| 4053 | if (fatal) { |
| 4054 | if (!hostdata->dstat_valid) { |
| 4055 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); |
| 4056 | hostdata->dstat_valid = 1; |
| 4057 | } |
| 4058 | |
| 4059 | if (!(hostdata->dstat & DSTAT_DFE)) { |
| 4060 | printk ("scsi%d : DMA FIFO not empty\n", host->host_no); |
| 4061 | /* |
| 4062 | * Really need to check this code for 710 RGH. |
| 4063 | * Havn't seen any problems, but maybe we should FLUSH before |
| 4064 | * clearing sometimes. |
| 4065 | */ |
| 4066 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); |
| 4067 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) |
| 4068 | ; |
| 4069 | hostdata->dstat |= DSTAT_DFE; |
| 4070 | } |
| 4071 | } |
| 4072 | } |
| 4073 | |
| 4074 | #ifdef CYCLIC_TRACE |
| 4075 | |
| 4076 | /* |
| 4077 | * The following implements a cyclic log of instructions executed, if you turn |
| 4078 | * TRACE on. It will also print the log for you. Very useful when debugging |
| 4079 | * 53c710 support, possibly not really needed any more. |
| 4080 | */ |
| 4081 | |
| 4082 | u32 insn_log[4096]; |
| 4083 | u32 insn_log_index = 0; |
| 4084 | |
| 4085 | void log1 (u32 i) |
| 4086 | { |
| 4087 | insn_log[insn_log_index++] = i; |
| 4088 | if (insn_log_index == 4096) |
| 4089 | insn_log_index = 0; |
| 4090 | } |
| 4091 | |
| 4092 | void log_insn (u32 *ip) |
| 4093 | { |
| 4094 | log1 ((u32)ip); |
| 4095 | log1 (*ip); |
| 4096 | log1 (*(ip+1)); |
| 4097 | if (((*ip >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) |
| 4098 | log1 (*(ip+2)); |
| 4099 | } |
| 4100 | |
| 4101 | void dump_log(void) |
| 4102 | { |
| 4103 | int cnt = 0; |
| 4104 | int i = insn_log_index; |
| 4105 | int size; |
| 4106 | struct Scsi_Host *host = first_host; |
| 4107 | |
| 4108 | while (cnt < 4096) { |
| 4109 | printk ("%08x (+%6x): ", insn_log[i], (insn_log[i] - (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4); |
| 4110 | if (++i == 4096) |
| 4111 | i = 0; |
| 4112 | cnt++; |
| 4113 | if (((insn_log[i] >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) |
| 4114 | size = 3; |
| 4115 | else |
| 4116 | size = 2; |
| 4117 | while (size--) { |
| 4118 | printk ("%08x ", insn_log[i]); |
| 4119 | if (++i == 4096) |
| 4120 | i = 0; |
| 4121 | cnt++; |
| 4122 | } |
| 4123 | printk ("\n"); |
| 4124 | } |
| 4125 | } |
| 4126 | #endif |
| 4127 | |
| 4128 | |
| 4129 | /* |
| 4130 | * Function : static void NCR53c7x0_intfly (struct Scsi_Host *host) |
| 4131 | * |
| 4132 | * Purpose : Scan command queue for specified host, looking for completed |
| 4133 | * commands. |
| 4134 | * |
| 4135 | * Inputs : Scsi_Host pointer. |
| 4136 | * |
| 4137 | * This is called from the interrupt handler, when a simulated INTFLY |
| 4138 | * interrupt occurs. |
| 4139 | */ |
| 4140 | |
| 4141 | static void |
| 4142 | NCR53c7x0_intfly (struct Scsi_Host *host) |
| 4143 | { |
| 4144 | NCR53c7x0_local_declare(); |
| 4145 | struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ |
| 4146 | struct NCR53c7x0_cmd *cmd, /* command which halted */ |
| 4147 | **cmd_prev_ptr; |
| 4148 | unsigned long flags; |
| 4149 | char search_found = 0; /* Got at least one ? */ |
| 4150 | |
| 4151 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 4152 | NCR53c7x0_local_setup(host); |
| 4153 | |
| 4154 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4155 | printk ("scsi%d : INTFLY\n", host->host_no); |
| 4156 | |
| 4157 | /* |
| 4158 | * Traverse our list of running commands, and look |
| 4159 | * for those with valid (non-0xff ff) status and message |
| 4160 | * bytes encoded in the result which signify command |
| 4161 | * completion. |
| 4162 | */ |
| 4163 | |
| 4164 | local_irq_save(flags); |
| 4165 | restart: |
| 4166 | for (cmd_prev_ptr = (struct NCR53c7x0_cmd **)&(hostdata->running_list), |
| 4167 | cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; cmd ; |
| 4168 | cmd_prev_ptr = (struct NCR53c7x0_cmd **) &(cmd->next), |
| 4169 | cmd = (struct NCR53c7x0_cmd *) cmd->next) |
| 4170 | { |
| 4171 | Scsi_Cmnd *tmp; |
| 4172 | |
| 4173 | if (!cmd) { |
| 4174 | printk("scsi%d : very weird.\n", host->host_no); |
| 4175 | break; |
| 4176 | } |
| 4177 | |
| 4178 | if (!(tmp = cmd->cmd)) { |
| 4179 | printk("scsi%d : weird. NCR53c7x0_cmd has no Scsi_Cmnd\n", |
| 4180 | host->host_no); |
| 4181 | continue; |
| 4182 | } |
| 4183 | /* Copy the result over now; may not be complete, |
| 4184 | * but subsequent tests may as well be done on |
| 4185 | * cached memory. |
| 4186 | */ |
| 4187 | tmp->result = cmd->result; |
| 4188 | |
| 4189 | if (((tmp->result & 0xff) == 0xff) || |
| 4190 | ((tmp->result & 0xff00) == 0xff00)) |
| 4191 | continue; |
| 4192 | |
| 4193 | search_found = 1; |
| 4194 | |
| 4195 | if (cmd->bounce.len) |
| 4196 | memcpy ((void *)cmd->bounce.addr, |
| 4197 | (void *)cmd->bounce.buf, cmd->bounce.len); |
| 4198 | |
| 4199 | /* Important - remove from list _before_ done is called */ |
| 4200 | if (cmd_prev_ptr) |
| 4201 | *cmd_prev_ptr = (struct NCR53c7x0_cmd *) cmd->next; |
| 4202 | |
| 4203 | --hostdata->busy[tmp->device->id][tmp->device->lun]; |
| 4204 | cmd->next = hostdata->free; |
| 4205 | hostdata->free = cmd; |
| 4206 | |
| 4207 | tmp->host_scribble = NULL; |
| 4208 | |
| 4209 | if (hostdata->options & OPTION_DEBUG_INTR) { |
| 4210 | printk ("scsi%d : command complete : pid %lu, id %d,lun %d result 0x%x ", |
| 4211 | host->host_no, tmp->pid, tmp->device->id, tmp->device->lun, tmp->result); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 4212 | __scsi_print_command (tmp->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | } |
| 4214 | |
| 4215 | tmp->scsi_done(tmp); |
| 4216 | goto restart; |
| 4217 | } |
| 4218 | local_irq_restore(flags); |
| 4219 | |
| 4220 | if (!search_found) { |
| 4221 | printk ("scsi%d : WARNING : INTFLY with no completed commands.\n", |
| 4222 | host->host_no); |
| 4223 | } else { |
| 4224 | run_process_issue_queue(); |
| 4225 | } |
| 4226 | return; |
| 4227 | } |
| 4228 | |
| 4229 | /* |
| 4230 | * Function : static irqreturn_t NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs) |
| 4231 | * |
| 4232 | * Purpose : handle NCR53c7x0 interrupts for all NCR devices sharing |
| 4233 | * the same IRQ line. |
| 4234 | * |
| 4235 | * Inputs : Since we're using the SA_INTERRUPT interrupt handler |
| 4236 | * semantics, irq indicates the interrupt which invoked |
| 4237 | * this handler. |
| 4238 | * |
| 4239 | * On the 710 we simualte an INTFLY with a script interrupt, and the |
| 4240 | * script interrupt handler will call back to this function. |
| 4241 | */ |
| 4242 | |
| 4243 | static irqreturn_t |
| 4244 | NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs) |
| 4245 | { |
| 4246 | NCR53c7x0_local_declare(); |
| 4247 | struct Scsi_Host *host; /* Host we are looking at */ |
| 4248 | unsigned char istat; /* Values of interrupt regs */ |
| 4249 | struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ |
| 4250 | struct NCR53c7x0_cmd *cmd; /* command which halted */ |
| 4251 | u32 *dsa; /* DSA */ |
| 4252 | int handled = 0; |
| 4253 | |
| 4254 | #ifdef NCR_DEBUG |
| 4255 | char buf[80]; /* Debugging sprintf buffer */ |
| 4256 | size_t buflen; /* Length of same */ |
| 4257 | #endif |
| 4258 | |
| 4259 | host = (struct Scsi_Host *)dev_id; |
| 4260 | hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 4261 | NCR53c7x0_local_setup(host); |
| 4262 | |
| 4263 | /* |
| 4264 | * Only read istat once per loop, since reading it again will unstack |
| 4265 | * interrupts |
| 4266 | */ |
| 4267 | |
| 4268 | while ((istat = NCR53c7x0_read8(hostdata->istat)) & (ISTAT_SIP|ISTAT_DIP)) { |
| 4269 | handled = 1; |
| 4270 | hostdata->dsp_changed = 0; |
| 4271 | hostdata->dstat_valid = 0; |
| 4272 | hostdata->state = STATE_HALTED; |
| 4273 | |
| 4274 | if (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) |
| 4275 | printk ("scsi%d : SCSI FIFO not empty\n", host->host_no); |
| 4276 | |
| 4277 | /* |
| 4278 | * NCR53c700 and NCR53c700-66 change the current SCSI |
| 4279 | * process, hostdata->ncrcurrent, in the Linux driver so |
| 4280 | * cmd = hostdata->ncrcurrent. |
| 4281 | * |
| 4282 | * With other chips, we must look through the commands |
| 4283 | * executing and find the command structure which |
| 4284 | * corresponds to the DSA register. |
| 4285 | */ |
| 4286 | |
| 4287 | if (hostdata->options & OPTION_700) { |
| 4288 | cmd = (struct NCR53c7x0_cmd *) hostdata->ncrcurrent; |
| 4289 | } else { |
| 4290 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); |
| 4291 | for (cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; |
| 4292 | cmd && (dsa + (hostdata->dsa_start / sizeof(u32))) != cmd->dsa; |
| 4293 | cmd = (struct NCR53c7x0_cmd *)(cmd->next)) |
| 4294 | ; |
| 4295 | } |
| 4296 | if (hostdata->options & OPTION_DEBUG_INTR) { |
| 4297 | if (cmd) { |
| 4298 | printk("scsi%d : interrupt for pid %lu, id %d, lun %d ", |
| 4299 | host->host_no, cmd->cmd->pid, (int) cmd->cmd->device->id, |
| 4300 | (int) cmd->cmd->device->lun); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 4301 | __scsi_print_command (cmd->cmd->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4302 | } else { |
| 4303 | printk("scsi%d : no active command\n", host->host_no); |
| 4304 | } |
| 4305 | } |
| 4306 | |
| 4307 | if (istat & ISTAT_SIP) { |
| 4308 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4309 | printk ("scsi%d : ISTAT_SIP\n", host->host_no); |
| 4310 | intr_scsi (host, cmd); |
| 4311 | } |
| 4312 | |
| 4313 | if (istat & ISTAT_DIP) { |
| 4314 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4315 | printk ("scsi%d : ISTAT_DIP\n", host->host_no); |
| 4316 | intr_dma (host, cmd); |
| 4317 | } |
| 4318 | |
| 4319 | if (!hostdata->dstat_valid) { |
| 4320 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); |
| 4321 | hostdata->dstat_valid = 1; |
| 4322 | } |
| 4323 | |
| 4324 | if (!(hostdata->dstat & DSTAT_DFE)) { |
| 4325 | printk ("scsi%d : DMA FIFO not empty\n", host->host_no); |
| 4326 | /* Really need to check this out for 710 RGH */ |
| 4327 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); |
| 4328 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) |
| 4329 | ; |
| 4330 | hostdata->dstat |= DSTAT_DFE; |
| 4331 | } |
| 4332 | |
| 4333 | if (!hostdata->idle && hostdata->state == STATE_HALTED) { |
| 4334 | if (!hostdata->dsp_changed) |
| 4335 | hostdata->dsp = (u32 *)bus_to_virt(NCR53c7x0_read32(DSP_REG)); |
| 4336 | #if 0 |
| 4337 | printk("scsi%d : new dsp is 0x%lx (virt 0x%p)\n", |
| 4338 | host->host_no, virt_to_bus(hostdata->dsp), hostdata->dsp); |
| 4339 | #endif |
| 4340 | |
| 4341 | hostdata->state = STATE_RUNNING; |
| 4342 | NCR53c7x0_write32 (DSP_REG, virt_to_bus(hostdata->dsp)); |
| 4343 | if (hostdata->options & OPTION_DEBUG_TRACE) { |
| 4344 | #ifdef CYCLIC_TRACE |
| 4345 | log_insn (hostdata->dsp); |
| 4346 | #else |
| 4347 | print_insn (host, hostdata->dsp, "t ", 1); |
| 4348 | #endif |
| 4349 | NCR53c7x0_write8 (DCNTL_REG, |
| 4350 | hostdata->saved_dcntl | DCNTL_SSM | DCNTL_STD); |
| 4351 | } |
| 4352 | } |
| 4353 | } |
| 4354 | return IRQ_HANDLED; |
| 4355 | } |
| 4356 | |
| 4357 | |
| 4358 | /* |
| 4359 | * Function : static int abort_connected (struct Scsi_Host *host) |
| 4360 | * |
| 4361 | * Purpose : Assuming that the NCR SCSI processor is currently |
| 4362 | * halted, break the currently established nexus. Clean |
| 4363 | * up of the NCR53c7x0_cmd and Scsi_Cmnd structures should |
| 4364 | * be done on receipt of the abort interrupt. |
| 4365 | * |
| 4366 | * Inputs : host - SCSI host |
| 4367 | * |
| 4368 | */ |
| 4369 | |
| 4370 | static int |
| 4371 | abort_connected (struct Scsi_Host *host) { |
| 4372 | #ifdef NEW_ABORT |
| 4373 | NCR53c7x0_local_declare(); |
| 4374 | #endif |
| 4375 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 4376 | host->hostdata[0]; |
| 4377 | /* FIXME : this probably should change for production kernels; at the |
| 4378 | least, counter should move to a per-host structure. */ |
| 4379 | static int counter = 5; |
| 4380 | #ifdef NEW_ABORT |
| 4381 | int sstat, phase, offset; |
| 4382 | u32 *script; |
| 4383 | NCR53c7x0_local_setup(host); |
| 4384 | #endif |
| 4385 | |
| 4386 | if (--counter <= 0) { |
| 4387 | disable(host); |
| 4388 | return 0; |
| 4389 | } |
| 4390 | |
| 4391 | printk ("scsi%d : DANGER : abort_connected() called \n", |
| 4392 | host->host_no); |
| 4393 | |
| 4394 | #ifdef NEW_ABORT |
| 4395 | |
| 4396 | /* |
| 4397 | * New strategy : Rather than using a generic abort routine, |
| 4398 | * we'll specifically try to source or sink the appropriate |
| 4399 | * amount of data for the phase we're currently in (taking into |
| 4400 | * account the current synchronous offset) |
| 4401 | */ |
| 4402 | |
| 4403 | sstat = (NCR53c8x0_read8 (SSTAT2_REG); |
| 4404 | offset = OFFSET (sstat & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; |
| 4405 | phase = sstat & SSTAT2_PHASE_MASK; |
| 4406 | |
| 4407 | /* |
| 4408 | * SET ATN |
| 4409 | * MOVE source_or_sink, WHEN CURRENT PHASE |
| 4410 | * < repeat for each outstanding byte > |
| 4411 | * JUMP send_abort_message |
| 4412 | */ |
| 4413 | |
| 4414 | script = hostdata->abort_script = kmalloc ( |
| 4415 | 8 /* instruction size */ * ( |
| 4416 | 1 /* set ATN */ + |
| 4417 | (!offset ? 1 : offset) /* One transfer per outstanding byte */ + |
| 4418 | 1 /* send abort message */), |
| 4419 | GFP_ATOMIC); |
| 4420 | |
| 4421 | |
| 4422 | #else /* def NEW_ABORT */ |
| 4423 | hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / |
| 4424 | sizeof(u32); |
| 4425 | #endif /* def NEW_ABORT */ |
| 4426 | hostdata->dsp_changed = 1; |
| 4427 | |
| 4428 | /* XXX - need to flag the command as aborted after the abort_connected |
| 4429 | code runs |
| 4430 | */ |
| 4431 | return 0; |
| 4432 | } |
| 4433 | |
| 4434 | /* |
| 4435 | * Function : static int datapath_residual (Scsi_Host *host) |
| 4436 | * |
| 4437 | * Purpose : return residual data count of what's in the chip. |
| 4438 | * |
| 4439 | * Inputs : host - SCSI host |
| 4440 | */ |
| 4441 | |
| 4442 | static int |
| 4443 | datapath_residual (struct Scsi_Host *host) { |
| 4444 | NCR53c7x0_local_declare(); |
| 4445 | int count, synchronous, sstat; |
| 4446 | unsigned int ddir; |
| 4447 | |
| 4448 | NCR53c7x0_local_setup(host); |
| 4449 | /* COMPAT : the 700 and 700-66 need to use DFIFO_00_BO_MASK */ |
| 4450 | count = ((NCR53c7x0_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) - |
| 4451 | (NCR53c7x0_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK; |
| 4452 | synchronous = NCR53c7x0_read8 (SXFER_REG) & SXFER_MO_MASK; |
| 4453 | /* COMPAT : DDIR is elsewhere on non-'8xx chips. */ |
| 4454 | ddir = NCR53c7x0_read8 (CTEST0_REG_700) & CTEST0_700_DDIR; |
| 4455 | |
| 4456 | if (ddir) { |
| 4457 | /* Receive */ |
| 4458 | if (synchronous) |
| 4459 | count += (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; |
| 4460 | else |
| 4461 | if (NCR53c7x0_read8 (SSTAT1_REG) & SSTAT1_ILF) |
| 4462 | ++count; |
| 4463 | } else { |
| 4464 | /* Send */ |
| 4465 | sstat = NCR53c7x0_read8 (SSTAT1_REG); |
| 4466 | if (sstat & SSTAT1_OLF) |
| 4467 | ++count; |
| 4468 | if (synchronous && (sstat & SSTAT1_ORF)) |
| 4469 | ++count; |
| 4470 | } |
| 4471 | return count; |
| 4472 | } |
| 4473 | |
| 4474 | /* |
| 4475 | * Function : static const char * sbcl_to_phase (int sbcl)_ |
| 4476 | * |
| 4477 | * Purpose : Convert SBCL register to user-parsable phase representation |
| 4478 | * |
| 4479 | * Inputs : sbcl - value of sbcl register |
| 4480 | */ |
| 4481 | |
| 4482 | |
| 4483 | static const char * |
| 4484 | sbcl_to_phase (int sbcl) { |
| 4485 | switch (sbcl & SBCL_PHASE_MASK) { |
| 4486 | case SBCL_PHASE_DATAIN: |
| 4487 | return "DATAIN"; |
| 4488 | case SBCL_PHASE_DATAOUT: |
| 4489 | return "DATAOUT"; |
| 4490 | case SBCL_PHASE_MSGIN: |
| 4491 | return "MSGIN"; |
| 4492 | case SBCL_PHASE_MSGOUT: |
| 4493 | return "MSGOUT"; |
| 4494 | case SBCL_PHASE_CMDOUT: |
| 4495 | return "CMDOUT"; |
| 4496 | case SBCL_PHASE_STATIN: |
| 4497 | return "STATUSIN"; |
| 4498 | default: |
| 4499 | return "unknown"; |
| 4500 | } |
| 4501 | } |
| 4502 | |
| 4503 | /* |
| 4504 | * Function : static const char * sstat2_to_phase (int sstat)_ |
| 4505 | * |
| 4506 | * Purpose : Convert SSTAT2 register to user-parsable phase representation |
| 4507 | * |
| 4508 | * Inputs : sstat - value of sstat register |
| 4509 | */ |
| 4510 | |
| 4511 | |
| 4512 | static const char * |
| 4513 | sstat2_to_phase (int sstat) { |
| 4514 | switch (sstat & SSTAT2_PHASE_MASK) { |
| 4515 | case SSTAT2_PHASE_DATAIN: |
| 4516 | return "DATAIN"; |
| 4517 | case SSTAT2_PHASE_DATAOUT: |
| 4518 | return "DATAOUT"; |
| 4519 | case SSTAT2_PHASE_MSGIN: |
| 4520 | return "MSGIN"; |
| 4521 | case SSTAT2_PHASE_MSGOUT: |
| 4522 | return "MSGOUT"; |
| 4523 | case SSTAT2_PHASE_CMDOUT: |
| 4524 | return "CMDOUT"; |
| 4525 | case SSTAT2_PHASE_STATIN: |
| 4526 | return "STATUSIN"; |
| 4527 | default: |
| 4528 | return "unknown"; |
| 4529 | } |
| 4530 | } |
| 4531 | |
| 4532 | /* |
| 4533 | * Function : static void intr_phase_mismatch (struct Scsi_Host *host, |
| 4534 | * struct NCR53c7x0_cmd *cmd) |
| 4535 | * |
| 4536 | * Purpose : Handle phase mismatch interrupts |
| 4537 | * |
| 4538 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd |
| 4539 | * may be NULL. |
| 4540 | * |
| 4541 | * Side effects : The abort_connected() routine is called or the NCR chip |
| 4542 | * is restarted, jumping to the command_complete entry point, or |
| 4543 | * patching the address and transfer count of the current instruction |
| 4544 | * and calling the msg_in entry point as appropriate. |
| 4545 | */ |
| 4546 | |
| 4547 | static void |
| 4548 | intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { |
| 4549 | NCR53c7x0_local_declare(); |
| 4550 | u32 dbc_dcmd, *dsp, *dsp_next; |
| 4551 | unsigned char dcmd, sbcl; |
| 4552 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 4553 | host->hostdata[0]; |
| 4554 | int residual; |
| 4555 | enum {ACTION_ABORT, ACTION_ABORT_PRINT, ACTION_CONTINUE} action = |
| 4556 | ACTION_ABORT_PRINT; |
| 4557 | const char *where = NULL; |
| 4558 | |
| 4559 | NCR53c7x0_local_setup(host); |
| 4560 | |
| 4561 | /* |
| 4562 | * Corrective action is based on where in the SCSI SCRIPT(tm) the error |
| 4563 | * occurred, as well as which SCSI phase we are currently in. |
| 4564 | */ |
| 4565 | dsp_next = bus_to_virt(NCR53c7x0_read32(DSP_REG)); |
| 4566 | |
| 4567 | /* |
| 4568 | * Fetch the current instruction, and remove the operands for easier |
| 4569 | * interpretation. |
| 4570 | */ |
| 4571 | dbc_dcmd = NCR53c7x0_read32(DBC_REG); |
| 4572 | dcmd = (dbc_dcmd & 0xff000000) >> 24; |
| 4573 | /* |
| 4574 | * Like other processors, the NCR adjusts the instruction pointer before |
| 4575 | * instruction decode. Set the DSP address back to what it should |
| 4576 | * be for this instruction based on its size (2 or 3 32 bit words). |
| 4577 | */ |
| 4578 | dsp = dsp_next - NCR53c7x0_insn_size(dcmd); |
| 4579 | |
| 4580 | |
| 4581 | /* |
| 4582 | * Read new SCSI phase from the SBCL lines. Since all of our code uses |
| 4583 | * a WHEN conditional instead of an IF conditional, we don't need to |
| 4584 | * wait for a new REQ. |
| 4585 | */ |
| 4586 | sbcl = NCR53c7x0_read8(SBCL_REG) & SBCL_PHASE_MASK; |
| 4587 | |
| 4588 | if (!cmd) { |
| 4589 | action = ACTION_ABORT_PRINT; |
| 4590 | where = "no current command"; |
| 4591 | /* |
| 4592 | * The way my SCSI SCRIPTS(tm) are architected, recoverable phase |
| 4593 | * mismatches should only occur where we're doing a multi-byte |
| 4594 | * BMI instruction. Specifically, this means |
| 4595 | * |
| 4596 | * - select messages (a SCSI-I target may ignore additional messages |
| 4597 | * after the IDENTIFY; any target may reject a SDTR or WDTR) |
| 4598 | * |
| 4599 | * - command out (targets may send a message to signal an error |
| 4600 | * condition, or go into STATUSIN after they've decided |
| 4601 | * they don't like the command. |
| 4602 | * |
| 4603 | * - reply_message (targets may reject a multi-byte message in the |
| 4604 | * middle) |
| 4605 | * |
| 4606 | * - data transfer routines (command completion with buffer space |
| 4607 | * left, disconnect message, or error message) |
| 4608 | */ |
| 4609 | } else if (((dsp >= cmd->data_transfer_start && |
| 4610 | dsp < cmd->data_transfer_end)) || dsp == (cmd->residual + 2)) { |
| 4611 | if ((dcmd & (DCMD_TYPE_MASK|DCMD_BMI_OP_MASK|DCMD_BMI_INDIRECT| |
| 4612 | DCMD_BMI_MSG|DCMD_BMI_CD)) == (DCMD_TYPE_BMI| |
| 4613 | DCMD_BMI_OP_MOVE_I)) { |
| 4614 | residual = datapath_residual (host); |
| 4615 | if (hostdata->options & OPTION_DEBUG_DISCONNECT) |
| 4616 | printk ("scsi%d : handling residual transfer (+ %d bytes from DMA FIFO)\n", |
| 4617 | host->host_no, residual); |
| 4618 | |
| 4619 | /* |
| 4620 | * The first instruction is a CALL to the alternate handler for |
| 4621 | * this data transfer phase, so we can do calls to |
| 4622 | * munge_msg_restart as we would if control were passed |
| 4623 | * from normal dynamic code. |
| 4624 | */ |
| 4625 | if (dsp != cmd->residual + 2) { |
| 4626 | cmd->residual[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | |
| 4627 | ((dcmd & DCMD_BMI_IO) ? DCMD_TCI_IO : 0)) << 24) | |
| 4628 | DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; |
| 4629 | cmd->residual[1] = virt_to_bus(hostdata->script) |
| 4630 | + ((dcmd & DCMD_BMI_IO) |
| 4631 | ? hostdata->E_other_in : hostdata->E_other_out); |
| 4632 | } |
| 4633 | |
| 4634 | /* |
| 4635 | * The second instruction is the a data transfer block |
| 4636 | * move instruction, reflecting the pointer and count at the |
| 4637 | * time of the phase mismatch. |
| 4638 | */ |
| 4639 | cmd->residual[2] = dbc_dcmd + residual; |
| 4640 | cmd->residual[3] = NCR53c7x0_read32(DNAD_REG) - residual; |
| 4641 | |
| 4642 | /* |
| 4643 | * The third and final instruction is a jump to the instruction |
| 4644 | * which follows the instruction which had to be 'split' |
| 4645 | */ |
| 4646 | if (dsp != cmd->residual + 2) { |
| 4647 | cmd->residual[4] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) |
| 4648 | << 24) | DBC_TCI_TRUE; |
| 4649 | cmd->residual[5] = virt_to_bus(dsp_next); |
| 4650 | } |
| 4651 | |
| 4652 | /* |
| 4653 | * For the sake of simplicity, transfer control to the |
| 4654 | * conditional CALL at the start of the residual buffer. |
| 4655 | */ |
| 4656 | hostdata->dsp = cmd->residual; |
| 4657 | hostdata->dsp_changed = 1; |
| 4658 | action = ACTION_CONTINUE; |
| 4659 | } else { |
| 4660 | where = "non-BMI dynamic DSA code"; |
| 4661 | action = ACTION_ABORT_PRINT; |
| 4662 | } |
| 4663 | } else if (dsp == (hostdata->script + hostdata->E_select_msgout / 4 + 2)) { |
| 4664 | /* RGH 290697: Added +2 above, to compensate for the script |
| 4665 | * instruction which disables the selection timer. */ |
| 4666 | /* Release ATN */ |
| 4667 | NCR53c7x0_write8 (SOCL_REG, 0); |
| 4668 | switch (sbcl) { |
| 4669 | /* |
| 4670 | * Some devices (SQ555 come to mind) grab the IDENTIFY message |
| 4671 | * sent on selection, and decide to go into COMMAND OUT phase |
| 4672 | * rather than accepting the rest of the messages or rejecting |
| 4673 | * them. Handle these devices gracefully. |
| 4674 | */ |
| 4675 | case SBCL_PHASE_CMDOUT: |
| 4676 | hostdata->dsp = dsp + 2 /* two _words_ */; |
| 4677 | hostdata->dsp_changed = 1; |
| 4678 | printk ("scsi%d : target %d ignored SDTR and went into COMMAND OUT\n", |
| 4679 | host->host_no, cmd->cmd->device->id); |
| 4680 | cmd->flags &= ~CMD_FLAG_SDTR; |
| 4681 | action = ACTION_CONTINUE; |
| 4682 | break; |
| 4683 | case SBCL_PHASE_MSGIN: |
| 4684 | hostdata->dsp = hostdata->script + hostdata->E_msg_in / |
| 4685 | sizeof(u32); |
| 4686 | hostdata->dsp_changed = 1; |
| 4687 | action = ACTION_CONTINUE; |
| 4688 | break; |
| 4689 | default: |
| 4690 | where="select message out"; |
| 4691 | action = ACTION_ABORT_PRINT; |
| 4692 | } |
| 4693 | /* |
| 4694 | * Some SCSI devices will interpret a command as they read the bytes |
| 4695 | * off the SCSI bus, and may decide that the command is Bogus before |
| 4696 | * they've read the entire command off the bus. |
| 4697 | */ |
| 4698 | } else if (dsp == hostdata->script + hostdata->E_cmdout_cmdout / sizeof |
| 4699 | (u32)) { |
| 4700 | hostdata->dsp = hostdata->script + hostdata->E_data_transfer / |
| 4701 | sizeof (u32); |
| 4702 | hostdata->dsp_changed = 1; |
| 4703 | action = ACTION_CONTINUE; |
| 4704 | /* FIXME : we need to handle message reject, etc. within msg_respond. */ |
| 4705 | #ifdef notyet |
| 4706 | } else if (dsp == hostdata->script + hostdata->E_reply_message) { |
| 4707 | switch (sbcl) { |
| 4708 | /* Any other phase mismatches abort the currently executing command. */ |
| 4709 | #endif |
| 4710 | } else { |
| 4711 | where = "unknown location"; |
| 4712 | action = ACTION_ABORT_PRINT; |
| 4713 | } |
| 4714 | |
| 4715 | /* Flush DMA FIFO */ |
| 4716 | if (!hostdata->dstat_valid) { |
| 4717 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); |
| 4718 | hostdata->dstat_valid = 1; |
| 4719 | } |
| 4720 | if (!(hostdata->dstat & DSTAT_DFE)) { |
| 4721 | /* Really need to check this out for 710 RGH */ |
| 4722 | NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); |
| 4723 | while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF); |
| 4724 | hostdata->dstat |= DSTAT_DFE; |
| 4725 | } |
| 4726 | |
| 4727 | switch (action) { |
| 4728 | case ACTION_ABORT_PRINT: |
| 4729 | printk("scsi%d : %s : unexpected phase %s.\n", |
| 4730 | host->host_no, where ? where : "unknown location", |
| 4731 | sbcl_to_phase(sbcl)); |
| 4732 | print_lots (host); |
| 4733 | /* Fall through to ACTION_ABORT */ |
| 4734 | case ACTION_ABORT: |
| 4735 | abort_connected (host); |
| 4736 | break; |
| 4737 | case ACTION_CONTINUE: |
| 4738 | break; |
| 4739 | } |
| 4740 | |
| 4741 | #if 0 |
| 4742 | if (hostdata->dsp_changed) { |
| 4743 | printk("scsi%d: new dsp 0x%p\n", host->host_no, hostdata->dsp); |
| 4744 | print_insn (host, hostdata->dsp, "", 1); |
| 4745 | } |
| 4746 | #endif |
| 4747 | } |
| 4748 | |
| 4749 | /* |
| 4750 | * Function : static void intr_bf (struct Scsi_Host *host, |
| 4751 | * struct NCR53c7x0_cmd *cmd) |
| 4752 | * |
| 4753 | * Purpose : handle BUS FAULT interrupts |
| 4754 | * |
| 4755 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd |
| 4756 | * may be NULL. |
| 4757 | */ |
| 4758 | |
| 4759 | static void |
| 4760 | intr_bf (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { |
| 4761 | NCR53c7x0_local_declare(); |
| 4762 | u32 *dsp, |
| 4763 | *next_dsp, /* Current dsp */ |
| 4764 | *dsa, |
| 4765 | dbc_dcmd; /* DCMD (high eight bits) + DBC */ |
| 4766 | char *reason = NULL; |
| 4767 | /* Default behavior is for a silent error, with a retry until we've |
| 4768 | exhausted retries. */ |
| 4769 | enum {MAYBE, ALWAYS, NEVER} retry = MAYBE; |
| 4770 | int report = 0; |
| 4771 | NCR53c7x0_local_setup(host); |
| 4772 | |
| 4773 | dbc_dcmd = NCR53c7x0_read32 (DBC_REG); |
| 4774 | next_dsp = bus_to_virt (NCR53c7x0_read32(DSP_REG)); |
| 4775 | dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); |
| 4776 | /* FIXME - check chip type */ |
| 4777 | dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); |
| 4778 | |
| 4779 | /* |
| 4780 | * Bus faults can be caused by either a Bad Address or |
| 4781 | * Target Abort. We should check the Received Target Abort |
| 4782 | * bit of the PCI status register and Master Abort Bit. |
| 4783 | * |
| 4784 | * - Master Abort bit indicates that no device claimed |
| 4785 | * the address with DEVSEL within five clocks |
| 4786 | * |
| 4787 | * - Target Abort bit indicates that a target claimed it, |
| 4788 | * but changed its mind once it saw the byte enables. |
| 4789 | * |
| 4790 | */ |
| 4791 | |
| 4792 | /* 53c710, not PCI system */ |
| 4793 | report = 1; |
| 4794 | reason = "Unknown"; |
| 4795 | |
| 4796 | #ifndef notyet |
| 4797 | report = 1; |
| 4798 | #endif |
| 4799 | if (report && reason) |
| 4800 | { |
| 4801 | printk(KERN_ALERT "scsi%d : BUS FAULT reason = %s\n", |
| 4802 | host->host_no, reason ? reason : "unknown"); |
| 4803 | print_lots (host); |
| 4804 | } |
| 4805 | |
| 4806 | #ifndef notyet |
| 4807 | retry = NEVER; |
| 4808 | #endif |
| 4809 | |
| 4810 | /* |
| 4811 | * TODO : we should attempt to recover from any spurious bus |
| 4812 | * faults. After X retries, we should figure that things are |
| 4813 | * sufficiently wedged, and call NCR53c7xx_reset. |
| 4814 | * |
| 4815 | * This code should only get executed once we've decided that we |
| 4816 | * cannot retry. |
| 4817 | */ |
| 4818 | |
| 4819 | if (retry == NEVER) { |
| 4820 | printk(KERN_ALERT " mail richard@sleepie.demon.co.uk\n"); |
| 4821 | FATAL (host); |
| 4822 | } |
| 4823 | } |
| 4824 | |
| 4825 | /* |
| 4826 | * Function : static void intr_dma (struct Scsi_Host *host, |
| 4827 | * struct NCR53c7x0_cmd *cmd) |
| 4828 | * |
| 4829 | * Purpose : handle all DMA interrupts, indicated by the setting |
| 4830 | * of the DIP bit in the ISTAT register. |
| 4831 | * |
| 4832 | * Inputs : host, cmd - host and NCR command causing the interrupt, cmd |
| 4833 | * may be NULL. |
| 4834 | */ |
| 4835 | |
| 4836 | static void |
| 4837 | intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { |
| 4838 | NCR53c7x0_local_declare(); |
| 4839 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 4840 | host->hostdata[0]; |
| 4841 | unsigned char dstat; /* DSTAT */ |
| 4842 | u32 *dsp, |
| 4843 | *next_dsp, /* Current dsp */ |
| 4844 | *dsa, |
| 4845 | dbc_dcmd; /* DCMD (high eight bits) + DBC */ |
| 4846 | int tmp; |
| 4847 | unsigned long flags; |
| 4848 | NCR53c7x0_local_setup(host); |
| 4849 | |
| 4850 | if (!hostdata->dstat_valid) { |
| 4851 | hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); |
| 4852 | hostdata->dstat_valid = 1; |
| 4853 | } |
| 4854 | |
| 4855 | dstat = hostdata->dstat; |
| 4856 | |
| 4857 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4858 | printk("scsi%d : DSTAT=0x%x\n", host->host_no, (int) dstat); |
| 4859 | |
| 4860 | dbc_dcmd = NCR53c7x0_read32 (DBC_REG); |
| 4861 | next_dsp = bus_to_virt(NCR53c7x0_read32(DSP_REG)); |
| 4862 | dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); |
| 4863 | /* XXX - check chip type */ |
| 4864 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); |
| 4865 | |
| 4866 | /* |
| 4867 | * DSTAT_ABRT is the aborted interrupt. This is set whenever the |
| 4868 | * SCSI chip is aborted. |
| 4869 | * |
| 4870 | * With NCR53c700 and NCR53c700-66 style chips, we should only |
| 4871 | * get this when the chip is currently running the accept |
| 4872 | * reselect/select code and we have set the abort bit in the |
| 4873 | * ISTAT register. |
| 4874 | * |
| 4875 | */ |
| 4876 | |
| 4877 | if (dstat & DSTAT_ABRT) { |
| 4878 | #if 0 |
| 4879 | /* XXX - add code here to deal with normal abort */ |
| 4880 | if ((hostdata->options & OPTION_700) && (hostdata->state == |
| 4881 | STATE_ABORTING)) { |
| 4882 | } else |
| 4883 | #endif |
| 4884 | { |
| 4885 | printk(KERN_ALERT "scsi%d : unexpected abort interrupt at\n" |
| 4886 | " ", host->host_no); |
| 4887 | print_insn (host, dsp, KERN_ALERT "s ", 1); |
| 4888 | FATAL (host); |
| 4889 | } |
| 4890 | } |
| 4891 | |
| 4892 | /* |
| 4893 | * DSTAT_SSI is the single step interrupt. Should be generated |
| 4894 | * whenever we have single stepped or are tracing. |
| 4895 | */ |
| 4896 | |
| 4897 | if (dstat & DSTAT_SSI) { |
| 4898 | if (hostdata->options & OPTION_DEBUG_TRACE) { |
| 4899 | /* Don't print instr. until we write DSP at end of intr function */ |
| 4900 | } else if (hostdata->options & OPTION_DEBUG_SINGLE) { |
| 4901 | print_insn (host, dsp, "s ", 0); |
| 4902 | local_irq_save(flags); |
| 4903 | /* XXX - should we do this, or can we get away with writing dsp? */ |
| 4904 | |
| 4905 | NCR53c7x0_write8 (DCNTL_REG, (NCR53c7x0_read8(DCNTL_REG) & |
| 4906 | ~DCNTL_SSM) | DCNTL_STD); |
| 4907 | local_irq_restore(flags); |
| 4908 | } else { |
| 4909 | printk(KERN_ALERT "scsi%d : unexpected single step interrupt at\n" |
| 4910 | " ", host->host_no); |
| 4911 | print_insn (host, dsp, KERN_ALERT "", 1); |
| 4912 | printk(KERN_ALERT " mail drew@PoohSticks.ORG\n"); |
| 4913 | FATAL (host); |
| 4914 | } |
| 4915 | } |
| 4916 | |
| 4917 | /* |
| 4918 | * DSTAT_IID / DSTAT_OPC (same bit, same meaning, only the name |
| 4919 | * is different) is generated whenever an illegal instruction is |
| 4920 | * encountered. |
| 4921 | * |
| 4922 | * XXX - we may want to emulate INTFLY here, so we can use |
| 4923 | * the same SCSI SCRIPT (tm) for NCR53c710 through NCR53c810 |
| 4924 | * chips. |
| 4925 | */ |
| 4926 | |
| 4927 | if (dstat & DSTAT_OPC) { |
| 4928 | /* |
| 4929 | * Ascertain if this IID interrupts occurred before or after a STO |
| 4930 | * interrupt. Since the interrupt handling code now leaves |
| 4931 | * DSP unmodified until _after_ all stacked interrupts have been |
| 4932 | * processed, reading the DSP returns the original DSP register. |
| 4933 | * This means that if dsp lies between the select code, and |
| 4934 | * message out following the selection code (where the IID interrupt |
| 4935 | * would have to have occurred by due to the implicit wait for REQ), |
| 4936 | * we have an IID interrupt resulting from a STO condition and |
| 4937 | * can ignore it. |
| 4938 | */ |
| 4939 | |
| 4940 | if (((dsp >= (hostdata->script + hostdata->E_select / sizeof(u32))) && |
| 4941 | (dsp <= (hostdata->script + hostdata->E_select_msgout / |
| 4942 | sizeof(u32) + 8))) || (hostdata->test_running == 2)) { |
| 4943 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 4944 | printk ("scsi%d : ignoring DSTAT_IID for SSTAT_STO\n", |
| 4945 | host->host_no); |
| 4946 | if (hostdata->expecting_iid) { |
| 4947 | hostdata->expecting_iid = 0; |
| 4948 | hostdata->idle = 1; |
| 4949 | if (hostdata->test_running == 2) { |
| 4950 | hostdata->test_running = 0; |
| 4951 | hostdata->test_completed = 3; |
| 4952 | } else if (cmd) |
| 4953 | abnormal_finished (cmd, DID_BAD_TARGET << 16); |
| 4954 | } else { |
| 4955 | hostdata->expecting_sto = 1; |
| 4956 | } |
| 4957 | /* |
| 4958 | * We can't guarantee we'll be able to execute the WAIT DISCONNECT |
| 4959 | * instruction within the 3.4us of bus free and arbitration delay |
| 4960 | * that a target can RESELECT in and assert REQ after we've dropped |
| 4961 | * ACK. If this happens, we'll get an illegal instruction interrupt. |
| 4962 | * Doing away with the WAIT DISCONNECT instructions broke everything, |
| 4963 | * so instead I'll settle for moving one WAIT DISCONNECT a few |
| 4964 | * instructions closer to the CLEAR ACK before it to minimize the |
| 4965 | * chances of this happening, and handle it if it occurs anyway. |
| 4966 | * |
| 4967 | * Simply continue with what we were doing, and control should |
| 4968 | * be transferred to the schedule routine which will ultimately |
| 4969 | * pass control onto the reselection or selection (not yet) |
| 4970 | * code. |
| 4971 | */ |
| 4972 | } else if (dbc_dcmd == 0x48000000 && (NCR53c7x0_read8 (SBCL_REG) & |
| 4973 | SBCL_REQ)) { |
| 4974 | if (!(hostdata->options & OPTION_NO_PRINT_RACE)) |
| 4975 | { |
| 4976 | printk("scsi%d: REQ before WAIT DISCONNECT IID\n", |
| 4977 | host->host_no); |
| 4978 | hostdata->options |= OPTION_NO_PRINT_RACE; |
| 4979 | } |
| 4980 | } else { |
| 4981 | printk(KERN_ALERT "scsi%d : invalid instruction\n", host->host_no); |
| 4982 | print_lots (host); |
| 4983 | printk(KERN_ALERT " mail Richard@sleepie.demon.co.uk with ALL\n" |
| 4984 | " boot messages and diagnostic output\n"); |
| 4985 | FATAL (host); |
| 4986 | } |
| 4987 | } |
| 4988 | |
| 4989 | /* |
| 4990 | * DSTAT_BF are bus fault errors. DSTAT_800_BF is valid for 710 also. |
| 4991 | */ |
| 4992 | |
| 4993 | if (dstat & DSTAT_800_BF) { |
| 4994 | intr_bf (host, cmd); |
| 4995 | } |
| 4996 | |
| 4997 | |
| 4998 | /* |
| 4999 | * DSTAT_SIR interrupts are generated by the execution of |
| 5000 | * the INT instruction. Since the exact values available |
| 5001 | * are determined entirely by the SCSI script running, |
| 5002 | * and are local to a particular script, a unique handler |
| 5003 | * is called for each script. |
| 5004 | */ |
| 5005 | |
| 5006 | if (dstat & DSTAT_SIR) { |
| 5007 | if (hostdata->options & OPTION_DEBUG_INTR) |
| 5008 | printk ("scsi%d : DSTAT_SIR\n", host->host_no); |
| 5009 | switch ((tmp = hostdata->dstat_sir_intr (host, cmd))) { |
| 5010 | case SPECIFIC_INT_NOTHING: |
| 5011 | case SPECIFIC_INT_RESTART: |
| 5012 | break; |
| 5013 | case SPECIFIC_INT_ABORT: |
| 5014 | abort_connected(host); |
| 5015 | break; |
| 5016 | case SPECIFIC_INT_PANIC: |
| 5017 | printk(KERN_ALERT "scsi%d : failure at ", host->host_no); |
| 5018 | print_insn (host, dsp, KERN_ALERT "", 1); |
| 5019 | printk(KERN_ALERT " dstat_sir_intr() returned SPECIFIC_INT_PANIC\n"); |
| 5020 | FATAL (host); |
| 5021 | break; |
| 5022 | case SPECIFIC_INT_BREAK: |
| 5023 | intr_break (host, cmd); |
| 5024 | break; |
| 5025 | default: |
| 5026 | printk(KERN_ALERT "scsi%d : failure at ", host->host_no); |
| 5027 | print_insn (host, dsp, KERN_ALERT "", 1); |
| 5028 | printk(KERN_ALERT" dstat_sir_intr() returned unknown value %d\n", |
| 5029 | tmp); |
| 5030 | FATAL (host); |
| 5031 | } |
| 5032 | } |
| 5033 | } |
| 5034 | |
| 5035 | /* |
| 5036 | * Function : static int print_insn (struct Scsi_Host *host, |
| 5037 | * u32 *insn, int kernel) |
| 5038 | * |
| 5039 | * Purpose : print numeric representation of the instruction pointed |
| 5040 | * to by insn to the debugging or kernel message buffer |
| 5041 | * as appropriate. |
| 5042 | * |
| 5043 | * If desired, a user level program can interpret this |
| 5044 | * information. |
| 5045 | * |
| 5046 | * Inputs : host, insn - host, pointer to instruction, prefix - |
| 5047 | * string to prepend, kernel - use printk instead of debugging buffer. |
| 5048 | * |
| 5049 | * Returns : size, in u32s, of instruction printed. |
| 5050 | */ |
| 5051 | |
| 5052 | /* |
| 5053 | * FIXME: should change kernel parameter so that it takes an ENUM |
| 5054 | * specifying severity - either KERN_ALERT or KERN_PANIC so |
| 5055 | * all panic messages are output with the same severity. |
| 5056 | */ |
| 5057 | |
| 5058 | static int |
| 5059 | print_insn (struct Scsi_Host *host, const u32 *insn, |
| 5060 | const char *prefix, int kernel) { |
| 5061 | char buf[160], /* Temporary buffer and pointer. ICKY |
| 5062 | arbitrary length. */ |
| 5063 | |
| 5064 | |
| 5065 | *tmp; |
| 5066 | unsigned char dcmd; /* dcmd register for *insn */ |
| 5067 | int size; |
| 5068 | |
| 5069 | /* |
| 5070 | * Check to see if the instruction pointer is not bogus before |
| 5071 | * indirecting through it; avoiding red-zone at start of |
| 5072 | * memory. |
| 5073 | * |
| 5074 | * FIXME: icky magic needs to happen here on non-intel boxes which |
| 5075 | * don't have kernel memory mapped in like this. Might be reasonable |
| 5076 | * to use vverify()? |
| 5077 | */ |
| 5078 | |
| 5079 | if (virt_to_phys((void *)insn) < PAGE_SIZE || |
| 5080 | virt_to_phys((void *)(insn + 8)) > virt_to_phys(high_memory) || |
| 5081 | ((((dcmd = (insn[0] >> 24) & 0xff) & DCMD_TYPE_MMI) == DCMD_TYPE_MMI) && |
| 5082 | virt_to_phys((void *)(insn + 12)) > virt_to_phys(high_memory))) { |
| 5083 | size = 0; |
| 5084 | sprintf (buf, "%s%p: address out of range\n", |
| 5085 | prefix, insn); |
| 5086 | } else { |
| 5087 | /* |
| 5088 | * FIXME : (void *) cast in virt_to_bus should be unnecessary, because |
| 5089 | * it should take const void * as argument. |
| 5090 | */ |
| 5091 | #if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) |
| 5092 | sprintf(buf, "%s0x%lx (virt 0x%p) : 0x%08x 0x%08x (virt 0x%p)", |
| 5093 | (prefix ? prefix : ""), virt_to_bus((void *) insn), insn, |
| 5094 | insn[0], insn[1], bus_to_virt (insn[1])); |
| 5095 | #else |
| 5096 | /* Remove virtual addresses to reduce output, as they are the same */ |
| 5097 | sprintf(buf, "%s0x%x (+%x) : 0x%08x 0x%08x", |
| 5098 | (prefix ? prefix : ""), (u32)insn, ((u32)insn - |
| 5099 | (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4, |
| 5100 | insn[0], insn[1]); |
| 5101 | #endif |
| 5102 | tmp = buf + strlen(buf); |
| 5103 | if ((dcmd & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) { |
| 5104 | #if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) |
| 5105 | sprintf (tmp, " 0x%08x (virt 0x%p)\n", insn[2], |
| 5106 | bus_to_virt(insn[2])); |
| 5107 | #else |
| 5108 | /* Remove virtual addr to reduce output, as it is the same */ |
| 5109 | sprintf (tmp, " 0x%08x\n", insn[2]); |
| 5110 | #endif |
| 5111 | size = 3; |
| 5112 | } else { |
| 5113 | sprintf (tmp, "\n"); |
| 5114 | size = 2; |
| 5115 | } |
| 5116 | } |
| 5117 | |
| 5118 | if (kernel) |
| 5119 | printk ("%s", buf); |
| 5120 | #ifdef NCR_DEBUG |
| 5121 | else { |
| 5122 | size_t len = strlen(buf); |
| 5123 | debugger_kernel_write(host, buf, len); |
| 5124 | } |
| 5125 | #endif |
| 5126 | return size; |
| 5127 | } |
| 5128 | |
| 5129 | /* |
| 5130 | * Function : int NCR53c7xx_abort (Scsi_Cmnd *cmd) |
| 5131 | * |
| 5132 | * Purpose : Abort an errant SCSI command, doing all necessary |
| 5133 | * cleanup of the issue_queue, running_list, shared Linux/NCR |
| 5134 | * dsa issue and reconnect queues. |
| 5135 | * |
| 5136 | * Inputs : cmd - command to abort, code - entire result field |
| 5137 | * |
| 5138 | * Returns : 0 on success, -1 on failure. |
| 5139 | */ |
| 5140 | |
| 5141 | int |
| 5142 | NCR53c7xx_abort (Scsi_Cmnd *cmd) { |
| 5143 | NCR53c7x0_local_declare(); |
| 5144 | struct Scsi_Host *host = cmd->device->host; |
| 5145 | struct NCR53c7x0_hostdata *hostdata = host ? (struct NCR53c7x0_hostdata *) |
| 5146 | host->hostdata[0] : NULL; |
| 5147 | unsigned long flags; |
| 5148 | struct NCR53c7x0_cmd *curr, **prev; |
| 5149 | Scsi_Cmnd *me, **last; |
| 5150 | #if 0 |
| 5151 | static long cache_pid = -1; |
| 5152 | #endif |
| 5153 | |
| 5154 | |
| 5155 | if (!host) { |
| 5156 | printk ("Bogus SCSI command pid %ld; no host structure\n", |
| 5157 | cmd->pid); |
| 5158 | return SCSI_ABORT_ERROR; |
| 5159 | } else if (!hostdata) { |
| 5160 | printk ("Bogus SCSI host %d; no hostdata\n", host->host_no); |
| 5161 | return SCSI_ABORT_ERROR; |
| 5162 | } |
| 5163 | NCR53c7x0_local_setup(host); |
| 5164 | |
| 5165 | /* |
| 5166 | * CHECK : I don't think that reading ISTAT will unstack any interrupts, |
| 5167 | * since we need to write the INTF bit to clear it, and SCSI/DMA |
| 5168 | * interrupts don't clear until we read SSTAT/SIST and DSTAT registers. |
| 5169 | * |
| 5170 | * See that this is the case. Appears to be correct on the 710, at least. |
| 5171 | * |
| 5172 | * I suspect that several of our failures may be coming from a new fatal |
| 5173 | * interrupt (possibly due to a phase mismatch) happening after we've left |
| 5174 | * the interrupt handler, but before the PIC has had the interrupt condition |
| 5175 | * cleared. |
| 5176 | */ |
| 5177 | |
| 5178 | if (NCR53c7x0_read8(hostdata->istat) & (ISTAT_DIP|ISTAT_SIP)) { |
| 5179 | printk ("scsi%d : dropped interrupt for command %ld\n", host->host_no, |
| 5180 | cmd->pid); |
| 5181 | NCR53c7x0_intr (host->irq, NULL, NULL); |
| 5182 | return SCSI_ABORT_BUSY; |
| 5183 | } |
| 5184 | |
| 5185 | local_irq_save(flags); |
| 5186 | #if 0 |
| 5187 | if (cache_pid == cmd->pid) |
| 5188 | panic ("scsi%d : bloody fetus %d\n", host->host_no, cmd->pid); |
| 5189 | else |
| 5190 | cache_pid = cmd->pid; |
| 5191 | #endif |
| 5192 | |
| 5193 | |
| 5194 | /* |
| 5195 | * The command could be hiding in the issue_queue. This would be very |
| 5196 | * nice, as commands can't be moved from the high level driver's issue queue |
| 5197 | * into the shared queue until an interrupt routine is serviced, and this |
| 5198 | * moving is atomic. |
| 5199 | * |
| 5200 | * If this is the case, we don't have to worry about anything - we simply |
| 5201 | * pull the command out of the old queue, and call it aborted. |
| 5202 | */ |
| 5203 | |
| 5204 | for (me = (Scsi_Cmnd *) hostdata->issue_queue, |
| 5205 | last = (Scsi_Cmnd **) &(hostdata->issue_queue); |
| 5206 | me && me != cmd; last = (Scsi_Cmnd **)&(me->SCp.ptr), |
| 5207 | me = (Scsi_Cmnd *)me->SCp.ptr); |
| 5208 | |
| 5209 | if (me) { |
| 5210 | *last = (Scsi_Cmnd *) me->SCp.ptr; |
| 5211 | if (me->host_scribble) { |
| 5212 | ((struct NCR53c7x0_cmd *)me->host_scribble)->next = hostdata->free; |
| 5213 | hostdata->free = (struct NCR53c7x0_cmd *) me->host_scribble; |
| 5214 | me->host_scribble = NULL; |
| 5215 | } |
| 5216 | cmd->result = DID_ABORT << 16; |
| 5217 | cmd->scsi_done(cmd); |
| 5218 | printk ("scsi%d : found command %ld in Linux issue queue\n", |
| 5219 | host->host_no, me->pid); |
| 5220 | local_irq_restore(flags); |
| 5221 | run_process_issue_queue(); |
| 5222 | return SCSI_ABORT_SUCCESS; |
| 5223 | } |
| 5224 | |
| 5225 | /* |
| 5226 | * That failing, the command could be in our list of already executing |
| 5227 | * commands. If this is the case, drastic measures are called for. |
| 5228 | */ |
| 5229 | |
| 5230 | for (curr = (struct NCR53c7x0_cmd *) hostdata->running_list, |
| 5231 | prev = (struct NCR53c7x0_cmd **) &(hostdata->running_list); |
| 5232 | curr && curr->cmd != cmd; prev = (struct NCR53c7x0_cmd **) |
| 5233 | &(curr->next), curr = (struct NCR53c7x0_cmd *) curr->next); |
| 5234 | |
| 5235 | if (curr) { |
| 5236 | if ((curr->result & 0xff) != 0xff && (curr->result & 0xff00) != 0xff00) { |
| 5237 | cmd->result = curr->result; |
| 5238 | if (prev) |
| 5239 | *prev = (struct NCR53c7x0_cmd *) curr->next; |
| 5240 | curr->next = (struct NCR53c7x0_cmd *) hostdata->free; |
| 5241 | cmd->host_scribble = NULL; |
| 5242 | hostdata->free = curr; |
| 5243 | cmd->scsi_done(cmd); |
| 5244 | printk ("scsi%d : found finished command %ld in running list\n", |
| 5245 | host->host_no, cmd->pid); |
| 5246 | local_irq_restore(flags); |
| 5247 | return SCSI_ABORT_NOT_RUNNING; |
| 5248 | } else { |
| 5249 | printk ("scsi%d : DANGER : command running, can not abort.\n", |
| 5250 | cmd->device->host->host_no); |
| 5251 | local_irq_restore(flags); |
| 5252 | return SCSI_ABORT_BUSY; |
| 5253 | } |
| 5254 | } |
| 5255 | |
| 5256 | /* |
| 5257 | * And if we couldn't find it in any of our queues, it must have been |
| 5258 | * a dropped interrupt. |
| 5259 | */ |
| 5260 | |
| 5261 | curr = (struct NCR53c7x0_cmd *) cmd->host_scribble; |
| 5262 | if (curr) { |
| 5263 | curr->next = hostdata->free; |
| 5264 | hostdata->free = curr; |
| 5265 | cmd->host_scribble = NULL; |
| 5266 | } |
| 5267 | |
| 5268 | if (curr == NULL || ((curr->result & 0xff00) == 0xff00) || |
| 5269 | ((curr->result & 0xff) == 0xff)) { |
| 5270 | printk ("scsi%d : did this command ever run?\n", host->host_no); |
| 5271 | cmd->result = DID_ABORT << 16; |
| 5272 | } else { |
| 5273 | printk ("scsi%d : probably lost INTFLY, normal completion\n", |
| 5274 | host->host_no); |
| 5275 | cmd->result = curr->result; |
| 5276 | /* |
| 5277 | * FIXME : We need to add an additional flag which indicates if a |
| 5278 | * command was ever counted as BUSY, so if we end up here we can |
| 5279 | * decrement the busy count if and only if it is necessary. |
| 5280 | */ |
| 5281 | --hostdata->busy[cmd->device->id][cmd->device->lun]; |
| 5282 | } |
| 5283 | local_irq_restore(flags); |
| 5284 | cmd->scsi_done(cmd); |
| 5285 | |
| 5286 | /* |
| 5287 | * We need to run process_issue_queue since termination of this command |
| 5288 | * may allow another queued command to execute first? |
| 5289 | */ |
| 5290 | return SCSI_ABORT_NOT_RUNNING; |
| 5291 | } |
| 5292 | |
| 5293 | /* |
| 5294 | * Function : int NCR53c7xx_reset (Scsi_Cmnd *cmd) |
| 5295 | * |
| 5296 | * Purpose : perform a hard reset of the SCSI bus and NCR |
| 5297 | * chip. |
| 5298 | * |
| 5299 | * Inputs : cmd - command which caused the SCSI RESET |
| 5300 | * |
| 5301 | * Returns : 0 on success. |
| 5302 | */ |
| 5303 | |
| 5304 | int |
| 5305 | NCR53c7xx_reset (Scsi_Cmnd *cmd, unsigned int reset_flags) { |
| 5306 | NCR53c7x0_local_declare(); |
| 5307 | unsigned long flags; |
| 5308 | int found = 0; |
| 5309 | struct NCR53c7x0_cmd * c; |
| 5310 | Scsi_Cmnd *tmp; |
| 5311 | /* |
| 5312 | * When we call scsi_done(), it's going to wake up anything sleeping on the |
| 5313 | * resources which were in use by the aborted commands, and we'll start to |
| 5314 | * get new commands. |
| 5315 | * |
| 5316 | * We can't let this happen until after we've re-initialized the driver |
| 5317 | * structures, and can't reinitialize those structures until after we've |
| 5318 | * dealt with their contents. |
| 5319 | * |
| 5320 | * So, we need to find all of the commands which were running, stick |
| 5321 | * them on a linked list of completed commands (we'll use the host_scribble |
| 5322 | * pointer), do our reinitialization, and then call the done function for |
| 5323 | * each command. |
| 5324 | */ |
| 5325 | Scsi_Cmnd *nuke_list = NULL; |
| 5326 | struct Scsi_Host *host = cmd->device->host; |
| 5327 | struct NCR53c7x0_hostdata *hostdata = |
| 5328 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 5329 | |
| 5330 | NCR53c7x0_local_setup(host); |
| 5331 | local_irq_save(flags); |
| 5332 | ncr_halt (host); |
| 5333 | print_lots (host); |
| 5334 | dump_events (host, 30); |
| 5335 | ncr_scsi_reset (host); |
| 5336 | for (tmp = nuke_list = return_outstanding_commands (host, 1 /* free */, |
| 5337 | 0 /* issue */ ); tmp; tmp = (Scsi_Cmnd *) tmp->SCp.buffer) |
| 5338 | if (tmp == cmd) { |
| 5339 | found = 1; |
| 5340 | break; |
| 5341 | } |
| 5342 | |
| 5343 | /* |
| 5344 | * If we didn't find the command which caused this reset in our running |
| 5345 | * list, then we've lost it. See that it terminates normally anyway. |
| 5346 | */ |
| 5347 | if (!found) { |
| 5348 | c = (struct NCR53c7x0_cmd *) cmd->host_scribble; |
| 5349 | if (c) { |
| 5350 | cmd->host_scribble = NULL; |
| 5351 | c->next = hostdata->free; |
| 5352 | hostdata->free = c; |
| 5353 | } else |
| 5354 | printk ("scsi%d: lost command %ld\n", host->host_no, cmd->pid); |
| 5355 | cmd->SCp.buffer = (struct scatterlist *) nuke_list; |
| 5356 | nuke_list = cmd; |
| 5357 | } |
| 5358 | |
| 5359 | NCR53c7x0_driver_init (host); |
| 5360 | hostdata->soft_reset (host); |
| 5361 | if (hostdata->resets == 0) |
| 5362 | disable(host); |
| 5363 | else if (hostdata->resets != -1) |
| 5364 | --hostdata->resets; |
| 5365 | local_irq_restore(flags); |
| 5366 | for (; nuke_list; nuke_list = tmp) { |
| 5367 | tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; |
| 5368 | nuke_list->result = DID_RESET << 16; |
| 5369 | nuke_list->scsi_done (nuke_list); |
| 5370 | } |
| 5371 | local_irq_restore(flags); |
| 5372 | return SCSI_RESET_SUCCESS; |
| 5373 | } |
| 5374 | |
| 5375 | /* |
| 5376 | * The NCR SDMS bios follows Annex A of the SCSI-CAM draft, and |
| 5377 | * therefore shares the scsicam_bios_param function. |
| 5378 | */ |
| 5379 | |
| 5380 | /* |
| 5381 | * Function : int insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) |
| 5382 | * |
| 5383 | * Purpose : convert instructions stored at NCR pointer into data |
| 5384 | * pointer offset. |
| 5385 | * |
| 5386 | * Inputs : cmd - SCSI command; insn - pointer to instruction. Either current |
| 5387 | * DSP, or saved data pointer. |
| 5388 | * |
| 5389 | * Returns : offset on success, -1 on failure. |
| 5390 | */ |
| 5391 | |
| 5392 | |
| 5393 | static int |
| 5394 | insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) { |
| 5395 | struct NCR53c7x0_hostdata *hostdata = |
| 5396 | (struct NCR53c7x0_hostdata *) cmd->device->host->hostdata[0]; |
| 5397 | struct NCR53c7x0_cmd *ncmd = |
| 5398 | (struct NCR53c7x0_cmd *) cmd->host_scribble; |
| 5399 | int offset = 0, buffers; |
| 5400 | struct scatterlist *segment; |
| 5401 | char *ptr; |
| 5402 | int found = 0; |
| 5403 | |
| 5404 | /* |
| 5405 | * With the current code implementation, if the insn is inside dynamically |
| 5406 | * generated code, the data pointer will be the instruction preceding |
| 5407 | * the next transfer segment. |
| 5408 | */ |
| 5409 | |
| 5410 | if (!check_address ((unsigned long) ncmd, sizeof (struct NCR53c7x0_cmd)) && |
| 5411 | ((insn >= ncmd->data_transfer_start && |
| 5412 | insn < ncmd->data_transfer_end) || |
| 5413 | (insn >= ncmd->residual && |
| 5414 | insn < (ncmd->residual + |
| 5415 | sizeof(ncmd->residual))))) { |
| 5416 | ptr = bus_to_virt(insn[3]); |
| 5417 | |
| 5418 | if ((buffers = cmd->use_sg)) { |
| 5419 | for (offset = 0, |
| 5420 | segment = (struct scatterlist *) cmd->buffer; |
| 5421 | buffers && !((found = ((ptr >= (char *)page_address(segment->page)+segment->offset) && |
| 5422 | (ptr < ((char *)page_address(segment->page)+segment->offset+segment->length))))); |
| 5423 | --buffers, offset += segment->length, ++segment) |
| 5424 | #if 0 |
| 5425 | printk("scsi%d: comparing 0x%p to 0x%p\n", |
| 5426 | cmd->device->host->host_no, saved, page_address(segment->page+segment->offset); |
| 5427 | #else |
| 5428 | ; |
| 5429 | #endif |
| 5430 | offset += ptr - ((char *)page_address(segment->page)+segment->offset); |
| 5431 | } else { |
| 5432 | found = 1; |
| 5433 | offset = ptr - (char *) (cmd->request_buffer); |
| 5434 | } |
| 5435 | } else if ((insn >= hostdata->script + |
| 5436 | hostdata->E_data_transfer / sizeof(u32)) && |
| 5437 | (insn <= hostdata->script + |
| 5438 | hostdata->E_end_data_transfer / sizeof(u32))) { |
| 5439 | found = 1; |
| 5440 | offset = 0; |
| 5441 | } |
| 5442 | return found ? offset : -1; |
| 5443 | } |
| 5444 | |
| 5445 | |
| 5446 | |
| 5447 | /* |
| 5448 | * Function : void print_progress (Scsi_Cmnd *cmd) |
| 5449 | * |
| 5450 | * Purpose : print the current location of the saved data pointer |
| 5451 | * |
| 5452 | * Inputs : cmd - command we are interested in |
| 5453 | * |
| 5454 | */ |
| 5455 | |
| 5456 | static void |
| 5457 | print_progress (Scsi_Cmnd *cmd) { |
| 5458 | NCR53c7x0_local_declare(); |
| 5459 | struct NCR53c7x0_cmd *ncmd = |
| 5460 | (struct NCR53c7x0_cmd *) cmd->host_scribble; |
| 5461 | int offset, i; |
| 5462 | char *where; |
| 5463 | u32 *ptr; |
| 5464 | NCR53c7x0_local_setup (cmd->device->host); |
| 5465 | |
| 5466 | if (check_address ((unsigned long) ncmd,sizeof (struct NCR53c7x0_cmd)) == 0) |
| 5467 | { |
| 5468 | printk("\nNCR53c7x0_cmd fields:\n"); |
| 5469 | printk(" bounce.len=0x%x, addr=0x%0x, buf[]=0x%02x %02x %02x %02x\n", |
| 5470 | ncmd->bounce.len, ncmd->bounce.addr, ncmd->bounce.buf[0], |
| 5471 | ncmd->bounce.buf[1], ncmd->bounce.buf[2], ncmd->bounce.buf[3]); |
| 5472 | printk(" result=%04x, cdb[0]=0x%02x\n", ncmd->result, ncmd->cmnd[0]); |
| 5473 | } |
| 5474 | |
| 5475 | for (i = 0; i < 2; ++i) { |
| 5476 | if (check_address ((unsigned long) ncmd, |
| 5477 | sizeof (struct NCR53c7x0_cmd)) == -1) |
| 5478 | continue; |
| 5479 | if (!i) { |
| 5480 | where = "saved"; |
| 5481 | ptr = bus_to_virt(ncmd->saved_data_pointer); |
| 5482 | } else { |
| 5483 | where = "active"; |
| 5484 | ptr = bus_to_virt (NCR53c7x0_read32 (DSP_REG) - |
| 5485 | NCR53c7x0_insn_size (NCR53c7x0_read8 (DCMD_REG)) * |
| 5486 | sizeof(u32)); |
| 5487 | } |
| 5488 | offset = insn_to_offset (cmd, ptr); |
| 5489 | |
| 5490 | if (offset != -1) |
| 5491 | printk ("scsi%d : %s data pointer at offset %d\n", |
| 5492 | cmd->device->host->host_no, where, offset); |
| 5493 | else { |
| 5494 | int size; |
| 5495 | printk ("scsi%d : can't determine %s data pointer offset\n", |
| 5496 | cmd->device->host->host_no, where); |
| 5497 | if (ncmd) { |
| 5498 | size = print_insn (cmd->device->host, |
| 5499 | bus_to_virt(ncmd->saved_data_pointer), "", 1); |
| 5500 | print_insn (cmd->device->host, |
| 5501 | bus_to_virt(ncmd->saved_data_pointer) + size * sizeof(u32), |
| 5502 | "", 1); |
| 5503 | } |
| 5504 | } |
| 5505 | } |
| 5506 | } |
| 5507 | |
| 5508 | |
| 5509 | static void |
| 5510 | print_dsa (struct Scsi_Host *host, u32 *dsa, const char *prefix) { |
| 5511 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5512 | host->hostdata[0]; |
| 5513 | int i, len; |
| 5514 | char *ptr; |
| 5515 | Scsi_Cmnd *cmd; |
| 5516 | |
| 5517 | if (check_address ((unsigned long) dsa, hostdata->dsa_end - |
| 5518 | hostdata->dsa_start) == -1) { |
| 5519 | printk("scsi%d : bad dsa virt 0x%p\n", host->host_no, dsa); |
| 5520 | return; |
| 5521 | } |
| 5522 | printk("%sscsi%d : dsa at phys 0x%lx (virt 0x%p)\n" |
| 5523 | " + %d : dsa_msgout length = %u, data = 0x%x (virt 0x%p)\n" , |
| 5524 | prefix ? prefix : "", |
| 5525 | host->host_no, virt_to_bus (dsa), dsa, hostdata->dsa_msgout, |
| 5526 | dsa[hostdata->dsa_msgout / sizeof(u32)], |
| 5527 | dsa[hostdata->dsa_msgout / sizeof(u32) + 1], |
| 5528 | bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1])); |
| 5529 | |
| 5530 | /* |
| 5531 | * Only print messages if they're sane in length so we don't |
| 5532 | * blow the kernel printk buffer on something which won't buy us |
| 5533 | * anything. |
| 5534 | */ |
| 5535 | |
| 5536 | if (dsa[hostdata->dsa_msgout / sizeof(u32)] < |
| 5537 | sizeof (hostdata->free->select)) |
| 5538 | for (i = dsa[hostdata->dsa_msgout / sizeof(u32)], |
| 5539 | ptr = bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1]); |
| 5540 | i > 0 && !check_address ((unsigned long) ptr, 1); |
| 5541 | ptr += len, i -= len) { |
| 5542 | printk(" "); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 5543 | len = scsi_print_msg (ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5544 | printk("\n"); |
| 5545 | if (!len) |
| 5546 | break; |
| 5547 | } |
| 5548 | |
| 5549 | printk(" + %d : select_indirect = 0x%x\n", |
| 5550 | hostdata->dsa_select, dsa[hostdata->dsa_select / sizeof(u32)]); |
| 5551 | cmd = (Scsi_Cmnd *) bus_to_virt(dsa[hostdata->dsa_cmnd / sizeof(u32)]); |
| 5552 | printk(" + %d : dsa_cmnd = 0x%x ", hostdata->dsa_cmnd, |
| 5553 | (u32) virt_to_bus(cmd)); |
| 5554 | /* XXX Maybe we should access cmd->host_scribble->result here. RGH */ |
| 5555 | if (cmd) { |
| 5556 | printk(" result = 0x%x, target = %d, lun = %d, cmd = ", |
| 5557 | cmd->result, cmd->device->id, cmd->device->lun); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 5558 | __scsi_print_command(cmd->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5559 | } else |
| 5560 | printk("\n"); |
| 5561 | printk(" + %d : dsa_next = 0x%x\n", hostdata->dsa_next, |
| 5562 | dsa[hostdata->dsa_next / sizeof(u32)]); |
| 5563 | if (cmd) { |
| 5564 | printk("scsi%d target %d : sxfer_sanity = 0x%x, scntl3_sanity = 0x%x\n" |
| 5565 | " script : ", |
| 5566 | host->host_no, cmd->device->id, |
| 5567 | hostdata->sync[cmd->device->id].sxfer_sanity, |
| 5568 | hostdata->sync[cmd->device->id].scntl3_sanity); |
| 5569 | for (i = 0; i < (sizeof(hostdata->sync[cmd->device->id].script) / 4); ++i) |
| 5570 | printk ("0x%x ", hostdata->sync[cmd->device->id].script[i]); |
| 5571 | printk ("\n"); |
| 5572 | print_progress (cmd); |
| 5573 | } |
| 5574 | } |
| 5575 | /* |
| 5576 | * Function : void print_queues (Scsi_Host *host) |
| 5577 | * |
| 5578 | * Purpose : print the contents of the NCR issue and reconnect queues |
| 5579 | * |
| 5580 | * Inputs : host - SCSI host we are interested in |
| 5581 | * |
| 5582 | */ |
| 5583 | |
| 5584 | static void |
| 5585 | print_queues (struct Scsi_Host *host) { |
| 5586 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5587 | host->hostdata[0]; |
| 5588 | u32 *dsa, *next_dsa; |
| 5589 | volatile u32 *ncrcurrent; |
| 5590 | int left; |
| 5591 | Scsi_Cmnd *cmd, *next_cmd; |
| 5592 | unsigned long flags; |
| 5593 | |
| 5594 | printk ("scsi%d : issue queue\n", host->host_no); |
| 5595 | |
| 5596 | for (left = host->can_queue, cmd = (Scsi_Cmnd *) hostdata->issue_queue; |
| 5597 | left >= 0 && cmd; |
| 5598 | cmd = next_cmd) { |
| 5599 | next_cmd = (Scsi_Cmnd *) cmd->SCp.ptr; |
| 5600 | local_irq_save(flags); |
| 5601 | if (cmd->host_scribble) { |
| 5602 | if (check_address ((unsigned long) (cmd->host_scribble), |
| 5603 | sizeof (cmd->host_scribble)) == -1) |
| 5604 | printk ("scsi%d: scsi pid %ld bad pointer to NCR53c7x0_cmd\n", |
| 5605 | host->host_no, cmd->pid); |
| 5606 | /* print_dsa does sanity check on address, no need to check */ |
| 5607 | else |
| 5608 | print_dsa (host, ((struct NCR53c7x0_cmd *) cmd->host_scribble) |
| 5609 | -> dsa, ""); |
| 5610 | } else |
| 5611 | printk ("scsi%d : scsi pid %ld for target %d lun %d has no NCR53c7x0_cmd\n", |
| 5612 | host->host_no, cmd->pid, cmd->device->id, cmd->device->lun); |
| 5613 | local_irq_restore(flags); |
| 5614 | } |
| 5615 | |
| 5616 | if (left <= 0) { |
| 5617 | printk ("scsi%d : loop detected in issue queue\n", |
| 5618 | host->host_no); |
| 5619 | } |
| 5620 | |
| 5621 | /* |
| 5622 | * Traverse the NCR reconnect and start DSA structures, printing out |
| 5623 | * each element until we hit the end or detect a loop. Currently, |
| 5624 | * the reconnect structure is a linked list; and the start structure |
| 5625 | * is an array. Eventually, the reconnect structure will become a |
| 5626 | * list as well, since this simplifies the code. |
| 5627 | */ |
| 5628 | |
| 5629 | printk ("scsi%d : schedule dsa array :\n", host->host_no); |
| 5630 | for (left = host->can_queue, ncrcurrent = hostdata->schedule; |
| 5631 | left > 0; ncrcurrent += 2, --left) |
| 5632 | if (ncrcurrent[0] != hostdata->NOP_insn) |
| 5633 | /* FIXME : convert pointer to dsa_begin to pointer to dsa. */ |
| 5634 | print_dsa (host, bus_to_virt (ncrcurrent[1] - |
| 5635 | (hostdata->E_dsa_code_begin - |
| 5636 | hostdata->E_dsa_code_template)), ""); |
| 5637 | printk ("scsi%d : end schedule dsa array\n", host->host_no); |
| 5638 | |
| 5639 | printk ("scsi%d : reconnect_dsa_head :\n", host->host_no); |
| 5640 | |
| 5641 | for (left = host->can_queue, |
| 5642 | dsa = bus_to_virt (hostdata->reconnect_dsa_head); |
| 5643 | left >= 0 && dsa; |
| 5644 | dsa = next_dsa) { |
| 5645 | local_irq_save(flags); |
| 5646 | if (check_address ((unsigned long) dsa, sizeof(dsa)) == -1) { |
| 5647 | printk ("scsi%d: bad DSA pointer 0x%p", host->host_no, |
| 5648 | dsa); |
| 5649 | next_dsa = NULL; |
| 5650 | } |
| 5651 | else |
| 5652 | { |
| 5653 | next_dsa = bus_to_virt(dsa[hostdata->dsa_next / sizeof(u32)]); |
| 5654 | print_dsa (host, dsa, ""); |
| 5655 | } |
| 5656 | local_irq_restore(flags); |
| 5657 | } |
| 5658 | printk ("scsi%d : end reconnect_dsa_head\n", host->host_no); |
| 5659 | if (left < 0) |
| 5660 | printk("scsi%d: possible loop in ncr reconnect list\n", |
| 5661 | host->host_no); |
| 5662 | } |
| 5663 | |
| 5664 | static void |
| 5665 | print_lots (struct Scsi_Host *host) { |
| 5666 | NCR53c7x0_local_declare(); |
| 5667 | struct NCR53c7x0_hostdata *hostdata = |
| 5668 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 5669 | u32 *dsp_next, *dsp, *dsa, dbc_dcmd; |
| 5670 | unsigned char dcmd, sbcl; |
| 5671 | int i, size; |
| 5672 | NCR53c7x0_local_setup(host); |
| 5673 | |
| 5674 | if ((dsp_next = bus_to_virt(NCR53c7x0_read32 (DSP_REG)))) { |
| 5675 | dbc_dcmd = NCR53c7x0_read32(DBC_REG); |
| 5676 | dcmd = (dbc_dcmd & 0xff000000) >> 24; |
| 5677 | dsp = dsp_next - NCR53c7x0_insn_size(dcmd); |
| 5678 | dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); |
| 5679 | sbcl = NCR53c7x0_read8 (SBCL_REG); |
| 5680 | |
| 5681 | /* |
| 5682 | * For the 53c710, the following will report value 0 for SCNTL3 |
| 5683 | * and STEST0 - we don't have these registers. |
| 5684 | */ |
| 5685 | printk ("scsi%d : DCMD|DBC=0x%x, DNAD=0x%x (virt 0x%p)\n" |
| 5686 | " DSA=0x%lx (virt 0x%p)\n" |
| 5687 | " DSPS=0x%x, TEMP=0x%x (virt 0x%p), DMODE=0x%x\n" |
| 5688 | " SXFER=0x%x, SCNTL3=0x%x\n" |
| 5689 | " %s%s%sphase=%s, %d bytes in SCSI FIFO\n" |
| 5690 | " SCRATCH=0x%x, saved2_dsa=0x%0lx\n", |
| 5691 | host->host_no, dbc_dcmd, NCR53c7x0_read32(DNAD_REG), |
| 5692 | bus_to_virt(NCR53c7x0_read32(DNAD_REG)), |
| 5693 | virt_to_bus(dsa), dsa, |
| 5694 | NCR53c7x0_read32(DSPS_REG), NCR53c7x0_read32(TEMP_REG), |
| 5695 | bus_to_virt (NCR53c7x0_read32(TEMP_REG)), |
| 5696 | (int) NCR53c7x0_read8(hostdata->dmode), |
| 5697 | (int) NCR53c7x0_read8(SXFER_REG), |
| 5698 | ((hostdata->chip / 100) == 8) ? |
| 5699 | (int) NCR53c7x0_read8(SCNTL3_REG_800) : 0, |
| 5700 | (sbcl & SBCL_BSY) ? "BSY " : "", |
| 5701 | (sbcl & SBCL_SEL) ? "SEL " : "", |
| 5702 | (sbcl & SBCL_REQ) ? "REQ " : "", |
| 5703 | sstat2_to_phase(NCR53c7x0_read8 (((hostdata->chip / 100) == 8) ? |
| 5704 | SSTAT1_REG : SSTAT2_REG)), |
| 5705 | (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ? |
| 5706 | SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT, |
| 5707 | ((hostdata->chip / 100) == 8) ? NCR53c7x0_read8 (STEST0_REG_800) : |
| 5708 | NCR53c7x0_read32(SCRATCHA_REG_800), |
| 5709 | hostdata->saved2_dsa); |
| 5710 | printk ("scsi%d : DSP 0x%lx (virt 0x%p) ->\n", host->host_no, |
| 5711 | virt_to_bus(dsp), dsp); |
| 5712 | for (i = 6; i > 0; --i, dsp += size) |
| 5713 | size = print_insn (host, dsp, "", 1); |
| 5714 | if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { |
| 5715 | if ((hostdata->chip / 100) == 8) |
| 5716 | printk ("scsi%d : connected (SDID=0x%x, SSID=0x%x)\n", |
| 5717 | host->host_no, NCR53c7x0_read8 (SDID_REG_800), |
| 5718 | NCR53c7x0_read8 (SSID_REG_800)); |
| 5719 | else |
| 5720 | printk ("scsi%d : connected (SDID=0x%x)\n", |
| 5721 | host->host_no, NCR53c7x0_read8 (SDID_REG_700)); |
| 5722 | print_dsa (host, dsa, ""); |
| 5723 | } |
| 5724 | |
| 5725 | #if 1 |
| 5726 | print_queues (host); |
| 5727 | #endif |
| 5728 | } |
| 5729 | } |
| 5730 | |
| 5731 | /* |
| 5732 | * Function : static int shutdown (struct Scsi_Host *host) |
| 5733 | * |
| 5734 | * Purpose : does a clean (we hope) shutdown of the NCR SCSI |
| 5735 | * chip. Use prior to dumping core, unloading the NCR driver, |
| 5736 | * |
| 5737 | * Returns : 0 on success |
| 5738 | */ |
| 5739 | static int |
| 5740 | shutdown (struct Scsi_Host *host) { |
| 5741 | NCR53c7x0_local_declare(); |
| 5742 | unsigned long flags; |
| 5743 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5744 | host->hostdata[0]; |
| 5745 | NCR53c7x0_local_setup(host); |
| 5746 | local_irq_save(flags); |
| 5747 | /* Get in a state where we can reset the SCSI bus */ |
| 5748 | ncr_halt (host); |
| 5749 | ncr_scsi_reset (host); |
| 5750 | hostdata->soft_reset(host); |
| 5751 | |
| 5752 | disable (host); |
| 5753 | local_irq_restore(flags); |
| 5754 | return 0; |
| 5755 | } |
| 5756 | |
| 5757 | /* |
| 5758 | * Function : void ncr_scsi_reset (struct Scsi_Host *host) |
| 5759 | * |
| 5760 | * Purpose : reset the SCSI bus. |
| 5761 | */ |
| 5762 | |
| 5763 | static void |
| 5764 | ncr_scsi_reset (struct Scsi_Host *host) { |
| 5765 | NCR53c7x0_local_declare(); |
| 5766 | unsigned long flags; |
| 5767 | NCR53c7x0_local_setup(host); |
| 5768 | local_irq_save(flags); |
| 5769 | NCR53c7x0_write8(SCNTL1_REG, SCNTL1_RST); |
| 5770 | udelay(25); /* Minimum amount of time to assert RST */ |
| 5771 | NCR53c7x0_write8(SCNTL1_REG, 0); |
| 5772 | local_irq_restore(flags); |
| 5773 | } |
| 5774 | |
| 5775 | /* |
| 5776 | * Function : void hard_reset (struct Scsi_Host *host) |
| 5777 | * |
| 5778 | */ |
| 5779 | |
| 5780 | static void |
| 5781 | hard_reset (struct Scsi_Host *host) { |
| 5782 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5783 | host->hostdata[0]; |
| 5784 | unsigned long flags; |
| 5785 | local_irq_save(flags); |
| 5786 | ncr_scsi_reset(host); |
| 5787 | NCR53c7x0_driver_init (host); |
| 5788 | if (hostdata->soft_reset) |
| 5789 | hostdata->soft_reset (host); |
| 5790 | local_irq_restore(flags); |
| 5791 | } |
| 5792 | |
| 5793 | |
| 5794 | /* |
| 5795 | * Function : Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host, |
| 5796 | * int free, int issue) |
| 5797 | * |
| 5798 | * Purpose : return a linked list (using the SCp.buffer field as next, |
| 5799 | * so we don't perturb hostdata. We don't use a field of the |
| 5800 | * NCR53c7x0_cmd structure since we may not have allocated one |
| 5801 | * for the command causing the reset.) of Scsi_Cmnd structures that |
| 5802 | * had propagated below the Linux issue queue level. If free is set, |
| 5803 | * free the NCR53c7x0_cmd structures which are associated with |
| 5804 | * the Scsi_Cmnd structures, and clean up any internal |
| 5805 | * NCR lists that the commands were on. If issue is set, |
| 5806 | * also return commands in the issue queue. |
| 5807 | * |
| 5808 | * Returns : linked list of commands |
| 5809 | * |
| 5810 | * NOTE : the caller should insure that the NCR chip is halted |
| 5811 | * if the free flag is set. |
| 5812 | */ |
| 5813 | |
| 5814 | static Scsi_Cmnd * |
| 5815 | return_outstanding_commands (struct Scsi_Host *host, int free, int issue) { |
| 5816 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5817 | host->hostdata[0]; |
| 5818 | struct NCR53c7x0_cmd *c; |
| 5819 | int i; |
| 5820 | u32 *ncrcurrent; |
| 5821 | Scsi_Cmnd *list = NULL, *tmp; |
| 5822 | for (c = (struct NCR53c7x0_cmd *) hostdata->running_list; c; |
| 5823 | c = (struct NCR53c7x0_cmd *) c->next) { |
| 5824 | if (c->cmd->SCp.buffer) { |
| 5825 | printk ("scsi%d : loop detected in running list!\n", host->host_no); |
| 5826 | break; |
| 5827 | } else { |
| 5828 | printk ("Duh? Bad things happening in the NCR driver\n"); |
| 5829 | break; |
| 5830 | } |
| 5831 | |
| 5832 | c->cmd->SCp.buffer = (struct scatterlist *) list; |
| 5833 | list = c->cmd; |
| 5834 | if (free) { |
| 5835 | c->next = hostdata->free; |
| 5836 | hostdata->free = c; |
| 5837 | } |
| 5838 | } |
| 5839 | |
| 5840 | if (free) { |
| 5841 | for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; |
| 5842 | i < host->can_queue; ++i, ncrcurrent += 2) { |
| 5843 | ncrcurrent[0] = hostdata->NOP_insn; |
| 5844 | ncrcurrent[1] = 0xdeadbeef; |
| 5845 | } |
| 5846 | hostdata->ncrcurrent = NULL; |
| 5847 | } |
| 5848 | |
| 5849 | if (issue) { |
| 5850 | for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; tmp = tmp->next) { |
| 5851 | if (tmp->SCp.buffer) { |
| 5852 | printk ("scsi%d : loop detected in issue queue!\n", |
| 5853 | host->host_no); |
| 5854 | break; |
| 5855 | } |
| 5856 | tmp->SCp.buffer = (struct scatterlist *) list; |
| 5857 | list = tmp; |
| 5858 | } |
| 5859 | if (free) |
| 5860 | hostdata->issue_queue = NULL; |
| 5861 | |
| 5862 | } |
| 5863 | return list; |
| 5864 | } |
| 5865 | |
| 5866 | /* |
| 5867 | * Function : static int disable (struct Scsi_Host *host) |
| 5868 | * |
| 5869 | * Purpose : disables the given NCR host, causing all commands |
| 5870 | * to return a driver error. Call this so we can unload the |
| 5871 | * module during development and try again. Eventually, |
| 5872 | * we should be able to find clean workarounds for these |
| 5873 | * problems. |
| 5874 | * |
| 5875 | * Inputs : host - hostadapter to twiddle |
| 5876 | * |
| 5877 | * Returns : 0 on success. |
| 5878 | */ |
| 5879 | |
| 5880 | static int |
| 5881 | disable (struct Scsi_Host *host) { |
| 5882 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5883 | host->hostdata[0]; |
| 5884 | unsigned long flags; |
| 5885 | Scsi_Cmnd *nuke_list, *tmp; |
| 5886 | local_irq_save(flags); |
| 5887 | if (hostdata->state != STATE_HALTED) |
| 5888 | ncr_halt (host); |
| 5889 | nuke_list = return_outstanding_commands (host, 1 /* free */, 1 /* issue */); |
| 5890 | hard_reset (host); |
| 5891 | hostdata->state = STATE_DISABLED; |
| 5892 | local_irq_restore(flags); |
| 5893 | printk ("scsi%d : nuking commands\n", host->host_no); |
| 5894 | for (; nuke_list; nuke_list = tmp) { |
| 5895 | tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; |
| 5896 | nuke_list->result = DID_ERROR << 16; |
| 5897 | nuke_list->scsi_done(nuke_list); |
| 5898 | } |
| 5899 | printk ("scsi%d : done. \n", host->host_no); |
| 5900 | printk (KERN_ALERT "scsi%d : disabled. Unload and reload\n", |
| 5901 | host->host_no); |
| 5902 | return 0; |
| 5903 | } |
| 5904 | |
| 5905 | /* |
| 5906 | * Function : static int ncr_halt (struct Scsi_Host *host) |
| 5907 | * |
| 5908 | * Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip |
| 5909 | * |
| 5910 | * Inputs : host - SCSI chip to halt |
| 5911 | * |
| 5912 | * Returns : 0 on success |
| 5913 | */ |
| 5914 | |
| 5915 | static int |
| 5916 | ncr_halt (struct Scsi_Host *host) { |
| 5917 | NCR53c7x0_local_declare(); |
| 5918 | unsigned long flags; |
| 5919 | unsigned char istat, tmp; |
| 5920 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5921 | host->hostdata[0]; |
| 5922 | int stage; |
| 5923 | NCR53c7x0_local_setup(host); |
| 5924 | |
| 5925 | local_irq_save(flags); |
| 5926 | /* Stage 0 : eat all interrupts |
| 5927 | Stage 1 : set ABORT |
| 5928 | Stage 2 : eat all but abort interrupts |
| 5929 | Stage 3 : eat all interrupts |
| 5930 | */ |
| 5931 | for (stage = 0;;) { |
| 5932 | if (stage == 1) { |
| 5933 | NCR53c7x0_write8(hostdata->istat, ISTAT_ABRT); |
| 5934 | ++stage; |
| 5935 | } |
| 5936 | istat = NCR53c7x0_read8 (hostdata->istat); |
| 5937 | if (istat & ISTAT_SIP) { |
| 5938 | tmp = NCR53c7x0_read8(SSTAT0_REG); |
| 5939 | } else if (istat & ISTAT_DIP) { |
| 5940 | tmp = NCR53c7x0_read8(DSTAT_REG); |
| 5941 | if (stage == 2) { |
| 5942 | if (tmp & DSTAT_ABRT) { |
| 5943 | NCR53c7x0_write8(hostdata->istat, 0); |
| 5944 | ++stage; |
| 5945 | } else { |
| 5946 | printk(KERN_ALERT "scsi%d : could not halt NCR chip\n", |
| 5947 | host->host_no); |
| 5948 | disable (host); |
| 5949 | } |
| 5950 | } |
| 5951 | } |
| 5952 | if (!(istat & (ISTAT_SIP|ISTAT_DIP))) { |
| 5953 | if (stage == 0) |
| 5954 | ++stage; |
| 5955 | else if (stage == 3) |
| 5956 | break; |
| 5957 | } |
| 5958 | } |
| 5959 | hostdata->state = STATE_HALTED; |
| 5960 | local_irq_restore(flags); |
| 5961 | #if 0 |
| 5962 | print_lots (host); |
| 5963 | #endif |
| 5964 | return 0; |
| 5965 | } |
| 5966 | |
| 5967 | /* |
| 5968 | * Function: event_name (int event) |
| 5969 | * |
| 5970 | * Purpose: map event enum into user-readable strings. |
| 5971 | */ |
| 5972 | |
| 5973 | static const char * |
| 5974 | event_name (int event) { |
| 5975 | switch (event) { |
| 5976 | case EVENT_NONE: return "none"; |
| 5977 | case EVENT_ISSUE_QUEUE: return "to issue queue"; |
| 5978 | case EVENT_START_QUEUE: return "to start queue"; |
| 5979 | case EVENT_SELECT: return "selected"; |
| 5980 | case EVENT_DISCONNECT: return "disconnected"; |
| 5981 | case EVENT_RESELECT: return "reselected"; |
| 5982 | case EVENT_COMPLETE: return "completed"; |
| 5983 | case EVENT_IDLE: return "idle"; |
| 5984 | case EVENT_SELECT_FAILED: return "select failed"; |
| 5985 | case EVENT_BEFORE_SELECT: return "before select"; |
| 5986 | case EVENT_RESELECT_FAILED: return "reselect failed"; |
| 5987 | default: return "unknown"; |
| 5988 | } |
| 5989 | } |
| 5990 | |
| 5991 | /* |
| 5992 | * Function : void dump_events (struct Scsi_Host *host, count) |
| 5993 | * |
| 5994 | * Purpose : print last count events which have occurred. |
| 5995 | */ |
| 5996 | static void |
| 5997 | dump_events (struct Scsi_Host *host, int count) { |
| 5998 | struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) |
| 5999 | host->hostdata[0]; |
| 6000 | struct NCR53c7x0_event event; |
| 6001 | int i; |
| 6002 | unsigned long flags; |
| 6003 | if (hostdata->events) { |
| 6004 | if (count > hostdata->event_size) |
| 6005 | count = hostdata->event_size; |
| 6006 | for (i = hostdata->event_index; count > 0; |
| 6007 | i = (i ? i - 1 : hostdata->event_size -1), --count) { |
| 6008 | /* |
| 6009 | * By copying the event we're currently examining with interrupts |
| 6010 | * disabled, we can do multiple printk(), etc. operations and |
| 6011 | * still be guaranteed that they're happening on the same |
| 6012 | * event structure. |
| 6013 | */ |
| 6014 | local_irq_save(flags); |
| 6015 | #if 0 |
| 6016 | event = hostdata->events[i]; |
| 6017 | #else |
| 6018 | memcpy ((void *) &event, (void *) &(hostdata->events[i]), |
| 6019 | sizeof(event)); |
| 6020 | #endif |
| 6021 | |
| 6022 | local_irq_restore(flags); |
| 6023 | printk ("scsi%d : %s event %d at %ld secs %ld usecs target %d lun %d\n", |
| 6024 | host->host_no, event_name (event.event), count, |
| 6025 | (long) event.time.tv_sec, (long) event.time.tv_usec, |
| 6026 | event.target, event.lun); |
| 6027 | if (event.dsa) |
| 6028 | printk (" event for dsa 0x%lx (virt 0x%p)\n", |
| 6029 | virt_to_bus(event.dsa), event.dsa); |
| 6030 | if (event.pid != -1) { |
| 6031 | printk (" event for pid %ld ", event.pid); |
| db9dff3 | 2005-04-03 14:53:59 -0500 | [diff] [blame] | 6032 | __scsi_print_command (event.cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6033 | } |
| 6034 | } |
| 6035 | } |
| 6036 | } |
| 6037 | |
| 6038 | /* |
| 6039 | * Function: check_address |
| 6040 | * |
| 6041 | * Purpose: Check to see if a possibly corrupt pointer will fault the |
| 6042 | * kernel. |
| 6043 | * |
| 6044 | * Inputs: addr - address; size - size of area |
| 6045 | * |
| 6046 | * Returns: 0 if area is OK, -1 on error. |
| 6047 | * |
| 6048 | * NOTES: should be implemented in terms of vverify on kernels |
| 6049 | * that have it. |
| 6050 | */ |
| 6051 | |
| 6052 | static int |
| 6053 | check_address (unsigned long addr, int size) { |
| 6054 | return (virt_to_phys((void *)addr) < PAGE_SIZE || virt_to_phys((void *)(addr + size)) > virt_to_phys(high_memory) ? -1 : 0); |
| 6055 | } |
| 6056 | |
| 6057 | #ifdef MODULE |
| 6058 | int |
| 6059 | NCR53c7x0_release(struct Scsi_Host *host) { |
| 6060 | struct NCR53c7x0_hostdata *hostdata = |
| 6061 | (struct NCR53c7x0_hostdata *) host->hostdata[0]; |
| 6062 | struct NCR53c7x0_cmd *cmd, *tmp; |
| 6063 | shutdown (host); |
| 6064 | if (host->irq != SCSI_IRQ_NONE) |
| 6065 | { |
| 6066 | int irq_count; |
| 6067 | struct Scsi_Host *tmp; |
| 6068 | for (irq_count = 0, tmp = first_host; tmp; tmp = tmp->next) |
| 6069 | if (tmp->hostt == the_template && tmp->irq == host->irq) |
| 6070 | ++irq_count; |
| 6071 | if (irq_count == 1) |
| 6072 | free_irq(host->irq, NULL); |
| 6073 | } |
| 6074 | if (host->dma_channel != DMA_NONE) |
| 6075 | free_dma(host->dma_channel); |
| 6076 | if (host->io_port) |
| 6077 | release_region(host->io_port, host->n_io_port); |
| 6078 | |
| 6079 | for (cmd = (struct NCR53c7x0_cmd *) hostdata->free; cmd; cmd = tmp, |
| 6080 | --hostdata->num_cmds) { |
| 6081 | tmp = (struct NCR53c7x0_cmd *) cmd->next; |
| 6082 | /* |
| 6083 | * If we're going to loop, try to stop it to get a more accurate |
| 6084 | * count of the leaked commands. |
| 6085 | */ |
| 6086 | cmd->next = NULL; |
| 6087 | if (cmd->free) |
| 6088 | cmd->free ((void *) cmd->real, cmd->size); |
| 6089 | } |
| 6090 | if (hostdata->num_cmds) |
| 6091 | printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n", |
| 6092 | host->host_no, hostdata->num_cmds); |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 6093 | |
| 6094 | vfree(hostdata->events); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6095 | |
| 6096 | /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which |
| 6097 | * XXX may be invalid (CONFIG_060_WRITETHROUGH) |
| 6098 | */ |
| 6099 | kernel_set_cachemode((void *)hostdata, 8192, IOMAP_FULL_CACHING); |
| 6100 | free_pages ((u32)hostdata, 1); |
| 6101 | return 1; |
| 6102 | } |
| 6103 | #endif /* def MODULE */ |