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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 | #ifndef _BLK_H #define _BLK_H #include <linux/blkdev.h> #include <linux/locks.h> #include <linux/config.h> /* * NR_REQUEST is the number of entries in the request-queue. * NOTE that writes may use only the low 2/3 of these: reads * take precedence. */ #define NR_REQUEST 64 /* * This is used in the elevator algorithm: Note that * reads always go before writes. This is natural: reads * are much more time-critical than writes. */ #define IN_ORDER(s1,s2) \ ((s1)->cmd < (s2)->cmd || ((s1)->cmd == (s2)->cmd && \ ((s1)->rq_dev < (s2)->rq_dev || (((s1)->rq_dev == (s2)->rq_dev && \ (s1)->sector < (s2)->sector))))) /* * These will have to be changed to be aware of different buffer * sizes etc.. It actually needs a major cleanup. */ #ifdef IDE_DRIVER #define SECTOR_MASK ((BLOCK_SIZE >> 9) - 1) #else #define SECTOR_MASK (blksize_size[MAJOR_NR] && \ blksize_size[MAJOR_NR][MINOR(CURRENT->rq_dev)] ? \ ((blksize_size[MAJOR_NR][MINOR(CURRENT->rq_dev)] >> 9) - 1) : \ ((BLOCK_SIZE >> 9) - 1)) #endif /* IDE_DRIVER */ #define SUBSECTOR(block) (CURRENT->current_nr_sectors > 0) #ifdef CONFIG_CDU31A extern unsigned long cdu31a_init(unsigned long, unsigned long); #endif CONFIG_CDU31A #ifdef CONFIG_MCD extern unsigned long mcd_init(unsigned long, unsigned long); #endif CONFIG_MCD #ifdef CONFIG_MCDX extern unsigned long mcdx_init(unsigned long, unsigned long); #endif CONFIG_MCDX #ifdef CONFIG_SBPCD extern unsigned long sbpcd_init(unsigned long, unsigned long); #endif CONFIG_SBPCD #ifdef CONFIG_AZTCD extern unsigned long aztcd_init(unsigned long, unsigned long); #endif CONFIG_AZTCD #ifdef CONFIG_CDU535 extern unsigned long sony535_init(unsigned long, unsigned long); #endif CONFIG_CDU535 #ifdef CONFIG_GSCD extern unsigned long gscd_init(unsigned long, unsigned long); #endif CONFIG_GSCD #ifdef CONFIG_CM206 extern unsigned long cm206_init(unsigned long, unsigned long); #endif CONFIG_CM206 #ifdef CONFIG_OPTCD extern unsigned long optcd_init(unsigned long, unsigned long); #endif CONFIG_OPTCD #ifdef CONFIG_SJCD extern unsigned long sjcd_init(unsigned long, unsigned long); #endif CONFIG_SJCD #ifdef CONFIG_BLK_DEV_HD extern unsigned long hd_init(unsigned long mem_start, unsigned long mem_end); #endif #ifdef CONFIG_BLK_DEV_IDE extern unsigned long ide_init(unsigned long mem_start, unsigned long mem_end); #endif extern void set_device_ro(kdev_t dev,int flag); extern int floppy_init(void); extern void rd_load(void); extern long rd_init(long mem_start, int length); extern int ramdisk_size; #ifdef CONFIG_BLK_DEV_XD extern unsigned long xd_init(unsigned long mem_start, unsigned long mem_end); #endif #define RO_IOCTLS(dev,where) \ case BLKROSET: if (!suser()) return -EACCES; \ set_device_ro((dev),get_fs_long((long *) (where))); return 0; \ case BLKROGET: { int __err = verify_area(VERIFY_WRITE, (void *) (where), sizeof(long)); \ if (!__err) put_fs_long(0!=is_read_only(dev),(long *) (where)); return __err; } #if defined(MAJOR_NR) || defined(IDE_DRIVER) /* * Add entries as needed. */ #ifdef IDE_DRIVER #define DEVICE_NR(device) (MINOR(device) >> PARTN_BITS) #define DEVICE_ON(device) /* nothing */ #define DEVICE_OFF(device) /* nothing */ #elif (MAJOR_NR == MEM_MAJOR) /* ram disk */ #define DEVICE_NAME "ramdisk" #define DEVICE_REQUEST do_rd_request #define DEVICE_NR(device) (MINOR(device) & 7) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == FLOPPY_MAJOR) static void floppy_off(unsigned int nr); #define DEVICE_NAME "floppy" #define DEVICE_INTR do_floppy #define DEVICE_REQUEST do_fd_request #define DEVICE_NR(device) ( (MINOR(device) & 3) | ((MINOR(device) & 0x80 ) >> 5 )) #define DEVICE_ON(device) #define DEVICE_OFF(device) floppy_off(DEVICE_NR(device)) #elif (MAJOR_NR == HD_MAJOR) /* harddisk: timeout is 6 seconds.. */ #define DEVICE_NAME "harddisk" #define DEVICE_INTR do_hd #define DEVICE_TIMEOUT HD_TIMER #define TIMEOUT_VALUE (6*HZ) #define DEVICE_REQUEST do_hd_request #define DEVICE_NR(device) (MINOR(device)>>6) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == SCSI_DISK_MAJOR) #define DEVICE_NAME "scsidisk" #define DEVICE_INTR do_sd #define TIMEOUT_VALUE (2*HZ) #define DEVICE_REQUEST do_sd_request #define DEVICE_NR(device) (MINOR(device) >> 4) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == SCSI_TAPE_MAJOR) #define DEVICE_NAME "scsitape" #define DEVICE_INTR do_st #define DEVICE_NR(device) (MINOR(device) & 0x7f) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == SCSI_CDROM_MAJOR) #define DEVICE_NAME "CD-ROM" #define DEVICE_INTR do_sr #define DEVICE_REQUEST do_sr_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == XT_DISK_MAJOR) #define DEVICE_NAME "xt disk" #define DEVICE_REQUEST do_xd_request #define DEVICE_NR(device) (MINOR(device) >> 6) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == CDU31A_CDROM_MAJOR) #define DEVICE_NAME "CDU31A" #define DEVICE_REQUEST do_cdu31a_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MITSUMI_CDROM_MAJOR) #define DEVICE_NAME "Mitsumi CD-ROM" /* #define DEVICE_INTR do_mcd */ #define DEVICE_REQUEST do_mcd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MITSUMI_X_CDROM_MAJOR) #define DEVICE_NAME "Mitsumi CD-ROM" /* #define DEVICE_INTR do_mcdx */ #define DEVICE_REQUEST do_mcdx_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MATSUSHITA_CDROM_MAJOR) #define DEVICE_NAME "Matsushita CD-ROM controller #1" #define DEVICE_REQUEST do_sbpcd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MATSUSHITA_CDROM2_MAJOR) #define DEVICE_NAME "Matsushita CD-ROM controller #2" #define DEVICE_REQUEST do_sbpcd2_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MATSUSHITA_CDROM3_MAJOR) #define DEVICE_NAME "Matsushita CD-ROM controller #3" #define DEVICE_REQUEST do_sbpcd3_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == MATSUSHITA_CDROM4_MAJOR) #define DEVICE_NAME "Matsushita CD-ROM controller #4" #define DEVICE_REQUEST do_sbpcd4_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == AZTECH_CDROM_MAJOR) #define DEVICE_NAME "Aztech CD-ROM" #define DEVICE_REQUEST do_aztcd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == CDU535_CDROM_MAJOR) #define DEVICE_NAME "SONY-CDU535" #define DEVICE_INTR do_cdu535 #define DEVICE_REQUEST do_cdu535_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == GOLDSTAR_CDROM_MAJOR) #define DEVICE_NAME "Goldstar R420" #define DEVICE_REQUEST do_gscd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == CM206_CDROM_MAJOR) #define DEVICE_NAME "Philips/LMS cd-rom cm206" #define DEVICE_REQUEST do_cm206_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == OPTICS_CDROM_MAJOR) #define DEVICE_NAME "DOLPHIN 8000AT CD-ROM" #define DEVICE_REQUEST do_optcd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #elif (MAJOR_NR == SANYO_CDROM_MAJOR) #define DEVICE_NAME "Sanyo H94A CD-ROM" #define DEVICE_REQUEST do_sjcd_request #define DEVICE_NR(device) (MINOR(device)) #define DEVICE_ON(device) #define DEVICE_OFF(device) #endif /* MAJOR_NR == whatever */ #if (MAJOR_NR != SCSI_TAPE_MAJOR) && !defined(IDE_DRIVER) #ifndef CURRENT #define CURRENT (blk_dev[MAJOR_NR].current_request) #endif #define CURRENT_DEV DEVICE_NR(CURRENT->rq_dev) #ifdef DEVICE_INTR void (*DEVICE_INTR)(void) = NULL; #endif #ifdef DEVICE_TIMEOUT #define SET_TIMER \ ((timer_table[DEVICE_TIMEOUT].expires = jiffies + TIMEOUT_VALUE), \ (timer_active |= 1<<DEVICE_TIMEOUT)) #define CLEAR_TIMER \ timer_active &= ~(1<<DEVICE_TIMEOUT) #define SET_INTR(x) \ if ((DEVICE_INTR = (x)) != NULL) \ SET_TIMER; \ else \ CLEAR_TIMER; #else #define SET_INTR(x) (DEVICE_INTR = (x)) #endif /* DEVICE_TIMEOUT */ static void (DEVICE_REQUEST)(void); #ifdef DEVICE_INTR #define CLEAR_INTR SET_INTR(NULL) #else #define CLEAR_INTR #endif #define INIT_REQUEST \ if (!CURRENT) {\ CLEAR_INTR; \ return; \ } \ if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) \ panic(DEVICE_NAME ": request list destroyed"); \ if (CURRENT->bh) { \ if (!CURRENT->bh->b_lock) \ panic(DEVICE_NAME ": block not locked"); \ } #endif /* (MAJOR_NR != SCSI_TAPE_MAJOR) && !defined(IDE_DRIVER) */ /* end_request() - SCSI devices have their own version */ /* - IDE drivers have their own copy too */ #if ! SCSI_MAJOR(MAJOR_NR) #if defined(_IDE_CD_C) || defined(_TRITON_C) /* shares copy with ide.c */ void ide_end_request(byte uptodate, ide_hwgroup_t *hwgroup); #else #ifdef IDE_DRIVER void ide_end_request(byte uptodate, ide_hwgroup_t *hwgroup) { struct request *req = hwgroup->rq; #else static void end_request(int uptodate) { struct request *req = CURRENT; #endif /* IDE_DRIVER */ struct buffer_head * bh; req->errors = 0; if (!uptodate) { printk("end_request: I/O error, dev %s, sector %lu\n", kdevname(req->rq_dev), req->sector); req->nr_sectors--; req->nr_sectors &= ~SECTOR_MASK; req->sector += (BLOCK_SIZE / 512); req->sector &= ~SECTOR_MASK; } if ((bh = req->bh) != NULL) { req->bh = bh->b_reqnext; bh->b_reqnext = NULL; bh->b_uptodate = uptodate; if (!uptodate) bh->b_req = 0; /* So no "Weird" errors */ unlock_buffer(bh); if ((bh = req->bh) != NULL) { req->current_nr_sectors = bh->b_size >> 9; if (req->nr_sectors < req->current_nr_sectors) { req->nr_sectors = req->current_nr_sectors; printk("end_request: buffer-list destroyed\n"); } req->buffer = bh->b_data; return; } } #ifdef IDE_DRIVER hwgroup->rq = NULL; #else DEVICE_OFF(req->rq_dev); CURRENT = req->next; #endif /* IDE_DRIVER */ if (req->sem != NULL) up(req->sem); req->rq_status = RQ_INACTIVE; wake_up(&wait_for_request); } #endif /* ndef _IDE_CD_C */ #endif /* ! SCSI_MAJOR(MAJOR_NR) */ #endif /* defined(MAJOR_NR) || defined(IDE_DRIVER) */ #endif /* _BLK_H */ |