Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | libata-core.c - helper library for ATA |
| 3 | |
| 4 | Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| 5 | Copyright 2003-2004 Jeff Garzik |
| 6 | |
| 7 | The contents of this file are subject to the Open |
| 8 | Software License version 1.1 that can be found at |
| 9 | http://www.opensource.org/licenses/osl-1.1.txt and is included herein |
| 10 | by reference. |
| 11 | |
| 12 | Alternatively, the contents of this file may be used under the terms |
| 13 | of the GNU General Public License version 2 (the "GPL") as distributed |
| 14 | in the kernel source COPYING file, in which case the provisions of |
| 15 | the GPL are applicable instead of the above. If you wish to allow |
| 16 | the use of your version of this file only under the terms of the |
| 17 | GPL and not to allow others to use your version of this file under |
| 18 | the OSL, indicate your decision by deleting the provisions above and |
| 19 | replace them with the notice and other provisions required by the GPL. |
| 20 | If you do not delete the provisions above, a recipient may use your |
| 21 | version of this file under either the OSL or the GPL. |
| 22 | |
| 23 | */ |
| 24 | |
| 25 | #include <linux/config.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/pci.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/list.h> |
| 31 | #include <linux/mm.h> |
| 32 | #include <linux/highmem.h> |
| 33 | #include <linux/spinlock.h> |
| 34 | #include <linux/blkdev.h> |
| 35 | #include <linux/delay.h> |
| 36 | #include <linux/timer.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/completion.h> |
| 39 | #include <linux/suspend.h> |
| 40 | #include <linux/workqueue.h> |
| 41 | #include <scsi/scsi.h> |
| 42 | #include "scsi.h" |
| 43 | #include "scsi_priv.h" |
| 44 | #include <scsi/scsi_host.h> |
| 45 | #include <linux/libata.h> |
| 46 | #include <asm/io.h> |
| 47 | #include <asm/semaphore.h> |
| 48 | #include <asm/byteorder.h> |
| 49 | |
| 50 | #include "libata.h" |
| 51 | |
| 52 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 53 | unsigned long tmout_pat, |
| 54 | unsigned long tmout); |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 55 | static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static void ata_set_mode(struct ata_port *ap); |
| 57 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); |
| 58 | static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift); |
| 59 | static int fgb(u32 bitmap); |
| 60 | static int ata_choose_xfer_mode(struct ata_port *ap, |
| 61 | u8 *xfer_mode_out, |
| 62 | unsigned int *xfer_shift_out); |
| 63 | static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat); |
| 64 | static void __ata_qc_complete(struct ata_queued_cmd *qc); |
| 65 | |
| 66 | static unsigned int ata_unique_id = 1; |
| 67 | static struct workqueue_struct *ata_wq; |
| 68 | |
| 69 | MODULE_AUTHOR("Jeff Garzik"); |
| 70 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 71 | MODULE_LICENSE("GPL"); |
| 72 | MODULE_VERSION(DRV_VERSION); |
| 73 | |
| 74 | /** |
| 75 | * ata_tf_load - send taskfile registers to host controller |
| 76 | * @ap: Port to which output is sent |
| 77 | * @tf: ATA taskfile register set |
| 78 | * |
| 79 | * Outputs ATA taskfile to standard ATA host controller. |
| 80 | * |
| 81 | * LOCKING: |
| 82 | * Inherited from caller. |
| 83 | */ |
| 84 | |
| 85 | static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 86 | { |
| 87 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 88 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 89 | |
| 90 | if (tf->ctl != ap->last_ctl) { |
| 91 | outb(tf->ctl, ioaddr->ctl_addr); |
| 92 | ap->last_ctl = tf->ctl; |
| 93 | ata_wait_idle(ap); |
| 94 | } |
| 95 | |
| 96 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 97 | outb(tf->hob_feature, ioaddr->feature_addr); |
| 98 | outb(tf->hob_nsect, ioaddr->nsect_addr); |
| 99 | outb(tf->hob_lbal, ioaddr->lbal_addr); |
| 100 | outb(tf->hob_lbam, ioaddr->lbam_addr); |
| 101 | outb(tf->hob_lbah, ioaddr->lbah_addr); |
| 102 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 103 | tf->hob_feature, |
| 104 | tf->hob_nsect, |
| 105 | tf->hob_lbal, |
| 106 | tf->hob_lbam, |
| 107 | tf->hob_lbah); |
| 108 | } |
| 109 | |
| 110 | if (is_addr) { |
| 111 | outb(tf->feature, ioaddr->feature_addr); |
| 112 | outb(tf->nsect, ioaddr->nsect_addr); |
| 113 | outb(tf->lbal, ioaddr->lbal_addr); |
| 114 | outb(tf->lbam, ioaddr->lbam_addr); |
| 115 | outb(tf->lbah, ioaddr->lbah_addr); |
| 116 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 117 | tf->feature, |
| 118 | tf->nsect, |
| 119 | tf->lbal, |
| 120 | tf->lbam, |
| 121 | tf->lbah); |
| 122 | } |
| 123 | |
| 124 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 125 | outb(tf->device, ioaddr->device_addr); |
| 126 | VPRINTK("device 0x%X\n", tf->device); |
| 127 | } |
| 128 | |
| 129 | ata_wait_idle(ap); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * ata_tf_load_mmio - send taskfile registers to host controller |
| 134 | * @ap: Port to which output is sent |
| 135 | * @tf: ATA taskfile register set |
| 136 | * |
| 137 | * Outputs ATA taskfile to standard ATA host controller using MMIO. |
| 138 | * |
| 139 | * LOCKING: |
| 140 | * Inherited from caller. |
| 141 | */ |
| 142 | |
| 143 | static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 144 | { |
| 145 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 146 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 147 | |
| 148 | if (tf->ctl != ap->last_ctl) { |
| 149 | writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr); |
| 150 | ap->last_ctl = tf->ctl; |
| 151 | ata_wait_idle(ap); |
| 152 | } |
| 153 | |
| 154 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 155 | writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr); |
| 156 | writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr); |
| 157 | writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr); |
| 158 | writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr); |
| 159 | writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr); |
| 160 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 161 | tf->hob_feature, |
| 162 | tf->hob_nsect, |
| 163 | tf->hob_lbal, |
| 164 | tf->hob_lbam, |
| 165 | tf->hob_lbah); |
| 166 | } |
| 167 | |
| 168 | if (is_addr) { |
| 169 | writeb(tf->feature, (void __iomem *) ioaddr->feature_addr); |
| 170 | writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr); |
| 171 | writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr); |
| 172 | writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr); |
| 173 | writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr); |
| 174 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 175 | tf->feature, |
| 176 | tf->nsect, |
| 177 | tf->lbal, |
| 178 | tf->lbam, |
| 179 | tf->lbah); |
| 180 | } |
| 181 | |
| 182 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 183 | writeb(tf->device, (void __iomem *) ioaddr->device_addr); |
| 184 | VPRINTK("device 0x%X\n", tf->device); |
| 185 | } |
| 186 | |
| 187 | ata_wait_idle(ap); |
| 188 | } |
| 189 | |
| 190 | void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) |
| 191 | { |
| 192 | if (ap->flags & ATA_FLAG_MMIO) |
| 193 | ata_tf_load_mmio(ap, tf); |
| 194 | else |
| 195 | ata_tf_load_pio(ap, tf); |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * ata_exec_command - issue ATA command to host controller |
| 200 | * @ap: port to which command is being issued |
| 201 | * @tf: ATA taskfile register set |
| 202 | * |
| 203 | * Issues PIO/MMIO write to ATA command register, with proper |
| 204 | * synchronization with interrupt handler / other threads. |
| 205 | * |
| 206 | * LOCKING: |
| 207 | * spin_lock_irqsave(host_set lock) |
| 208 | */ |
| 209 | |
| 210 | static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 211 | { |
| 212 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 213 | |
| 214 | outb(tf->command, ap->ioaddr.command_addr); |
| 215 | ata_pause(ap); |
| 216 | } |
| 217 | |
| 218 | |
| 219 | /** |
| 220 | * ata_exec_command_mmio - issue ATA command to host controller |
| 221 | * @ap: port to which command is being issued |
| 222 | * @tf: ATA taskfile register set |
| 223 | * |
| 224 | * Issues MMIO write to ATA command register, with proper |
| 225 | * synchronization with interrupt handler / other threads. |
| 226 | * |
| 227 | * LOCKING: |
| 228 | * spin_lock_irqsave(host_set lock) |
| 229 | */ |
| 230 | |
| 231 | static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 232 | { |
| 233 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 234 | |
| 235 | writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr); |
| 236 | ata_pause(ap); |
| 237 | } |
| 238 | |
| 239 | void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) |
| 240 | { |
| 241 | if (ap->flags & ATA_FLAG_MMIO) |
| 242 | ata_exec_command_mmio(ap, tf); |
| 243 | else |
| 244 | ata_exec_command_pio(ap, tf); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * ata_exec - issue ATA command to host controller |
| 249 | * @ap: port to which command is being issued |
| 250 | * @tf: ATA taskfile register set |
| 251 | * |
| 252 | * Issues PIO/MMIO write to ATA command register, with proper |
| 253 | * synchronization with interrupt handler / other threads. |
| 254 | * |
| 255 | * LOCKING: |
| 256 | * Obtains host_set lock. |
| 257 | */ |
| 258 | |
| 259 | static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) |
| 260 | { |
| 261 | unsigned long flags; |
| 262 | |
| 263 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 264 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 265 | ap->ops->exec_command(ap, tf); |
| 266 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 271 | * @ap: port to which command is being issued |
| 272 | * @tf: ATA taskfile register set |
| 273 | * |
| 274 | * Issues ATA taskfile register set to ATA host controller, |
| 275 | * with proper synchronization with interrupt handler and |
| 276 | * other threads. |
| 277 | * |
| 278 | * LOCKING: |
| 279 | * Obtains host_set lock. |
| 280 | */ |
| 281 | |
| 282 | static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) |
| 283 | { |
| 284 | ap->ops->tf_load(ap, tf); |
| 285 | |
| 286 | ata_exec(ap, tf); |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * ata_tf_to_host_nolock - issue ATA taskfile to host controller |
| 291 | * @ap: port to which command is being issued |
| 292 | * @tf: ATA taskfile register set |
| 293 | * |
| 294 | * Issues ATA taskfile register set to ATA host controller, |
| 295 | * with proper synchronization with interrupt handler and |
| 296 | * other threads. |
| 297 | * |
| 298 | * LOCKING: |
| 299 | * spin_lock_irqsave(host_set lock) |
| 300 | */ |
| 301 | |
| 302 | void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) |
| 303 | { |
| 304 | ap->ops->tf_load(ap, tf); |
| 305 | ap->ops->exec_command(ap, tf); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * ata_tf_read - input device's ATA taskfile shadow registers |
| 310 | * @ap: Port from which input is read |
| 311 | * @tf: ATA taskfile register set for storing input |
| 312 | * |
| 313 | * Reads ATA taskfile registers for currently-selected device |
| 314 | * into @tf. |
| 315 | * |
| 316 | * LOCKING: |
| 317 | * Inherited from caller. |
| 318 | */ |
| 319 | |
| 320 | static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 321 | { |
| 322 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 323 | |
| 324 | tf->nsect = inb(ioaddr->nsect_addr); |
| 325 | tf->lbal = inb(ioaddr->lbal_addr); |
| 326 | tf->lbam = inb(ioaddr->lbam_addr); |
| 327 | tf->lbah = inb(ioaddr->lbah_addr); |
| 328 | tf->device = inb(ioaddr->device_addr); |
| 329 | |
| 330 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 331 | outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr); |
| 332 | tf->hob_feature = inb(ioaddr->error_addr); |
| 333 | tf->hob_nsect = inb(ioaddr->nsect_addr); |
| 334 | tf->hob_lbal = inb(ioaddr->lbal_addr); |
| 335 | tf->hob_lbam = inb(ioaddr->lbam_addr); |
| 336 | tf->hob_lbah = inb(ioaddr->lbah_addr); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * ata_tf_read_mmio - input device's ATA taskfile shadow registers |
| 342 | * @ap: Port from which input is read |
| 343 | * @tf: ATA taskfile register set for storing input |
| 344 | * |
| 345 | * Reads ATA taskfile registers for currently-selected device |
| 346 | * into @tf via MMIO. |
| 347 | * |
| 348 | * LOCKING: |
| 349 | * Inherited from caller. |
| 350 | */ |
| 351 | |
| 352 | static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 353 | { |
| 354 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 355 | |
| 356 | tf->nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 357 | tf->lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 358 | tf->lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 359 | tf->lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 360 | tf->device = readb((void __iomem *)ioaddr->device_addr); |
| 361 | |
| 362 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 363 | writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr); |
| 364 | tf->hob_feature = readb((void __iomem *)ioaddr->error_addr); |
| 365 | tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 366 | tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 367 | tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 368 | tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
| 373 | { |
| 374 | if (ap->flags & ATA_FLAG_MMIO) |
| 375 | ata_tf_read_mmio(ap, tf); |
| 376 | else |
| 377 | ata_tf_read_pio(ap, tf); |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * ata_check_status_pio - Read device status reg & clear interrupt |
| 382 | * @ap: port where the device is |
| 383 | * |
| 384 | * Reads ATA taskfile status register for currently-selected device |
| 385 | * and return it's value. This also clears pending interrupts |
| 386 | * from this device |
| 387 | * |
| 388 | * LOCKING: |
| 389 | * Inherited from caller. |
| 390 | */ |
| 391 | static u8 ata_check_status_pio(struct ata_port *ap) |
| 392 | { |
| 393 | return inb(ap->ioaddr.status_addr); |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * ata_check_status_mmio - Read device status reg & clear interrupt |
| 398 | * @ap: port where the device is |
| 399 | * |
| 400 | * Reads ATA taskfile status register for currently-selected device |
| 401 | * via MMIO and return it's value. This also clears pending interrupts |
| 402 | * from this device |
| 403 | * |
| 404 | * LOCKING: |
| 405 | * Inherited from caller. |
| 406 | */ |
| 407 | static u8 ata_check_status_mmio(struct ata_port *ap) |
| 408 | { |
| 409 | return readb((void __iomem *) ap->ioaddr.status_addr); |
| 410 | } |
| 411 | |
| 412 | u8 ata_check_status(struct ata_port *ap) |
| 413 | { |
| 414 | if (ap->flags & ATA_FLAG_MMIO) |
| 415 | return ata_check_status_mmio(ap); |
| 416 | return ata_check_status_pio(ap); |
| 417 | } |
| 418 | |
| 419 | u8 ata_altstatus(struct ata_port *ap) |
| 420 | { |
| 421 | if (ap->ops->check_altstatus) |
| 422 | return ap->ops->check_altstatus(ap); |
| 423 | |
| 424 | if (ap->flags & ATA_FLAG_MMIO) |
| 425 | return readb((void __iomem *)ap->ioaddr.altstatus_addr); |
| 426 | return inb(ap->ioaddr.altstatus_addr); |
| 427 | } |
| 428 | |
| 429 | u8 ata_chk_err(struct ata_port *ap) |
| 430 | { |
| 431 | if (ap->ops->check_err) |
| 432 | return ap->ops->check_err(ap); |
| 433 | |
| 434 | if (ap->flags & ATA_FLAG_MMIO) { |
| 435 | return readb((void __iomem *) ap->ioaddr.error_addr); |
| 436 | } |
| 437 | return inb(ap->ioaddr.error_addr); |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 442 | * @tf: Taskfile to convert |
| 443 | * @fis: Buffer into which data will output |
| 444 | * @pmp: Port multiplier port |
| 445 | * |
| 446 | * Converts a standard ATA taskfile to a Serial ATA |
| 447 | * FIS structure (Register - Host to Device). |
| 448 | * |
| 449 | * LOCKING: |
| 450 | * Inherited from caller. |
| 451 | */ |
| 452 | |
| 453 | void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) |
| 454 | { |
| 455 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 456 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, |
| 457 | bit 7 indicates Command FIS */ |
| 458 | fis[2] = tf->command; |
| 459 | fis[3] = tf->feature; |
| 460 | |
| 461 | fis[4] = tf->lbal; |
| 462 | fis[5] = tf->lbam; |
| 463 | fis[6] = tf->lbah; |
| 464 | fis[7] = tf->device; |
| 465 | |
| 466 | fis[8] = tf->hob_lbal; |
| 467 | fis[9] = tf->hob_lbam; |
| 468 | fis[10] = tf->hob_lbah; |
| 469 | fis[11] = tf->hob_feature; |
| 470 | |
| 471 | fis[12] = tf->nsect; |
| 472 | fis[13] = tf->hob_nsect; |
| 473 | fis[14] = 0; |
| 474 | fis[15] = tf->ctl; |
| 475 | |
| 476 | fis[16] = 0; |
| 477 | fis[17] = 0; |
| 478 | fis[18] = 0; |
| 479 | fis[19] = 0; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 484 | * @fis: Buffer from which data will be input |
| 485 | * @tf: Taskfile to output |
| 486 | * |
| 487 | * Converts a standard ATA taskfile to a Serial ATA |
| 488 | * FIS structure (Register - Host to Device). |
| 489 | * |
| 490 | * LOCKING: |
| 491 | * Inherited from caller. |
| 492 | */ |
| 493 | |
| 494 | void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf) |
| 495 | { |
| 496 | tf->command = fis[2]; /* status */ |
| 497 | tf->feature = fis[3]; /* error */ |
| 498 | |
| 499 | tf->lbal = fis[4]; |
| 500 | tf->lbam = fis[5]; |
| 501 | tf->lbah = fis[6]; |
| 502 | tf->device = fis[7]; |
| 503 | |
| 504 | tf->hob_lbal = fis[8]; |
| 505 | tf->hob_lbam = fis[9]; |
| 506 | tf->hob_lbah = fis[10]; |
| 507 | |
| 508 | tf->nsect = fis[12]; |
| 509 | tf->hob_nsect = fis[13]; |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * ata_prot_to_cmd - determine which read/write opcodes to use |
| 514 | * @protocol: ATA_PROT_xxx taskfile protocol |
| 515 | * @lba48: true is lba48 is present |
| 516 | * |
| 517 | * Given necessary input, determine which read/write commands |
| 518 | * to use to transfer data. |
| 519 | * |
| 520 | * LOCKING: |
| 521 | * None. |
| 522 | */ |
| 523 | static int ata_prot_to_cmd(int protocol, int lba48) |
| 524 | { |
| 525 | int rcmd = 0, wcmd = 0; |
| 526 | |
| 527 | switch (protocol) { |
| 528 | case ATA_PROT_PIO: |
| 529 | if (lba48) { |
| 530 | rcmd = ATA_CMD_PIO_READ_EXT; |
| 531 | wcmd = ATA_CMD_PIO_WRITE_EXT; |
| 532 | } else { |
| 533 | rcmd = ATA_CMD_PIO_READ; |
| 534 | wcmd = ATA_CMD_PIO_WRITE; |
| 535 | } |
| 536 | break; |
| 537 | |
| 538 | case ATA_PROT_DMA: |
| 539 | if (lba48) { |
| 540 | rcmd = ATA_CMD_READ_EXT; |
| 541 | wcmd = ATA_CMD_WRITE_EXT; |
| 542 | } else { |
| 543 | rcmd = ATA_CMD_READ; |
| 544 | wcmd = ATA_CMD_WRITE; |
| 545 | } |
| 546 | break; |
| 547 | |
| 548 | default: |
| 549 | return -1; |
| 550 | } |
| 551 | |
| 552 | return rcmd | (wcmd << 8); |
| 553 | } |
| 554 | |
| 555 | /** |
| 556 | * ata_dev_set_protocol - set taskfile protocol and r/w commands |
| 557 | * @dev: device to examine and configure |
| 558 | * |
| 559 | * Examine the device configuration, after we have |
| 560 | * read the identify-device page and configured the |
| 561 | * data transfer mode. Set internal state related to |
| 562 | * the ATA taskfile protocol (pio, pio mult, dma, etc.) |
| 563 | * and calculate the proper read/write commands to use. |
| 564 | * |
| 565 | * LOCKING: |
| 566 | * caller. |
| 567 | */ |
| 568 | static void ata_dev_set_protocol(struct ata_device *dev) |
| 569 | { |
| 570 | int pio = (dev->flags & ATA_DFLAG_PIO); |
| 571 | int lba48 = (dev->flags & ATA_DFLAG_LBA48); |
| 572 | int proto, cmd; |
| 573 | |
| 574 | if (pio) |
| 575 | proto = dev->xfer_protocol = ATA_PROT_PIO; |
| 576 | else |
| 577 | proto = dev->xfer_protocol = ATA_PROT_DMA; |
| 578 | |
| 579 | cmd = ata_prot_to_cmd(proto, lba48); |
| 580 | if (cmd < 0) |
| 581 | BUG(); |
| 582 | |
| 583 | dev->read_cmd = cmd & 0xff; |
| 584 | dev->write_cmd = (cmd >> 8) & 0xff; |
| 585 | } |
| 586 | |
| 587 | static const char * xfer_mode_str[] = { |
| 588 | "UDMA/16", |
| 589 | "UDMA/25", |
| 590 | "UDMA/33", |
| 591 | "UDMA/44", |
| 592 | "UDMA/66", |
| 593 | "UDMA/100", |
| 594 | "UDMA/133", |
| 595 | "UDMA7", |
| 596 | "MWDMA0", |
| 597 | "MWDMA1", |
| 598 | "MWDMA2", |
| 599 | "PIO0", |
| 600 | "PIO1", |
| 601 | "PIO2", |
| 602 | "PIO3", |
| 603 | "PIO4", |
| 604 | }; |
| 605 | |
| 606 | /** |
| 607 | * ata_udma_string - convert UDMA bit offset to string |
| 608 | * @mask: mask of bits supported; only highest bit counts. |
| 609 | * |
| 610 | * Determine string which represents the highest speed |
| 611 | * (highest bit in @udma_mask). |
| 612 | * |
| 613 | * LOCKING: |
| 614 | * None. |
| 615 | * |
| 616 | * RETURNS: |
| 617 | * Constant C string representing highest speed listed in |
| 618 | * @udma_mask, or the constant C string "<n/a>". |
| 619 | */ |
| 620 | |
| 621 | static const char *ata_mode_string(unsigned int mask) |
| 622 | { |
| 623 | int i; |
| 624 | |
| 625 | for (i = 7; i >= 0; i--) |
| 626 | if (mask & (1 << i)) |
| 627 | goto out; |
| 628 | for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--) |
| 629 | if (mask & (1 << i)) |
| 630 | goto out; |
| 631 | for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--) |
| 632 | if (mask & (1 << i)) |
| 633 | goto out; |
| 634 | |
| 635 | return "<n/a>"; |
| 636 | |
| 637 | out: |
| 638 | return xfer_mode_str[i]; |
| 639 | } |
| 640 | |
| 641 | /** |
| 642 | * ata_pio_devchk - PATA device presence detection |
| 643 | * @ap: ATA channel to examine |
| 644 | * @device: Device to examine (starting at zero) |
| 645 | * |
| 646 | * This technique was originally described in |
| 647 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 648 | * later found its way into the ATA/ATAPI spec. |
| 649 | * |
| 650 | * Write a pattern to the ATA shadow registers, |
| 651 | * and if a device is present, it will respond by |
| 652 | * correctly storing and echoing back the |
| 653 | * ATA shadow register contents. |
| 654 | * |
| 655 | * LOCKING: |
| 656 | * caller. |
| 657 | */ |
| 658 | |
| 659 | static unsigned int ata_pio_devchk(struct ata_port *ap, |
| 660 | unsigned int device) |
| 661 | { |
| 662 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 663 | u8 nsect, lbal; |
| 664 | |
| 665 | ap->ops->dev_select(ap, device); |
| 666 | |
| 667 | outb(0x55, ioaddr->nsect_addr); |
| 668 | outb(0xaa, ioaddr->lbal_addr); |
| 669 | |
| 670 | outb(0xaa, ioaddr->nsect_addr); |
| 671 | outb(0x55, ioaddr->lbal_addr); |
| 672 | |
| 673 | outb(0x55, ioaddr->nsect_addr); |
| 674 | outb(0xaa, ioaddr->lbal_addr); |
| 675 | |
| 676 | nsect = inb(ioaddr->nsect_addr); |
| 677 | lbal = inb(ioaddr->lbal_addr); |
| 678 | |
| 679 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 680 | return 1; /* we found a device */ |
| 681 | |
| 682 | return 0; /* nothing found */ |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * ata_mmio_devchk - PATA device presence detection |
| 687 | * @ap: ATA channel to examine |
| 688 | * @device: Device to examine (starting at zero) |
| 689 | * |
| 690 | * This technique was originally described in |
| 691 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 692 | * later found its way into the ATA/ATAPI spec. |
| 693 | * |
| 694 | * Write a pattern to the ATA shadow registers, |
| 695 | * and if a device is present, it will respond by |
| 696 | * correctly storing and echoing back the |
| 697 | * ATA shadow register contents. |
| 698 | * |
| 699 | * LOCKING: |
| 700 | * caller. |
| 701 | */ |
| 702 | |
| 703 | static unsigned int ata_mmio_devchk(struct ata_port *ap, |
| 704 | unsigned int device) |
| 705 | { |
| 706 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 707 | u8 nsect, lbal; |
| 708 | |
| 709 | ap->ops->dev_select(ap, device); |
| 710 | |
| 711 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 712 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 713 | |
| 714 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); |
| 715 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); |
| 716 | |
| 717 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 718 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 719 | |
| 720 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 721 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 722 | |
| 723 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 724 | return 1; /* we found a device */ |
| 725 | |
| 726 | return 0; /* nothing found */ |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * ata_devchk - PATA device presence detection |
| 731 | * @ap: ATA channel to examine |
| 732 | * @device: Device to examine (starting at zero) |
| 733 | * |
| 734 | * Dispatch ATA device presence detection, depending |
| 735 | * on whether we are using PIO or MMIO to talk to the |
| 736 | * ATA shadow registers. |
| 737 | * |
| 738 | * LOCKING: |
| 739 | * caller. |
| 740 | */ |
| 741 | |
| 742 | static unsigned int ata_devchk(struct ata_port *ap, |
| 743 | unsigned int device) |
| 744 | { |
| 745 | if (ap->flags & ATA_FLAG_MMIO) |
| 746 | return ata_mmio_devchk(ap, device); |
| 747 | return ata_pio_devchk(ap, device); |
| 748 | } |
| 749 | |
| 750 | /** |
| 751 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 752 | * @tf: ATA taskfile register set for device to be identified |
| 753 | * |
| 754 | * Determine from taskfile register contents whether a device is |
| 755 | * ATA or ATAPI, as per "Signature and persistence" section |
| 756 | * of ATA/PI spec (volume 1, sect 5.14). |
| 757 | * |
| 758 | * LOCKING: |
| 759 | * None. |
| 760 | * |
| 761 | * RETURNS: |
| 762 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN |
| 763 | * the event of failure. |
| 764 | */ |
| 765 | |
| 766 | unsigned int ata_dev_classify(struct ata_taskfile *tf) |
| 767 | { |
| 768 | /* Apple's open source Darwin code hints that some devices only |
| 769 | * put a proper signature into the LBA mid/high registers, |
| 770 | * So, we only check those. It's sufficient for uniqueness. |
| 771 | */ |
| 772 | |
| 773 | if (((tf->lbam == 0) && (tf->lbah == 0)) || |
| 774 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { |
| 775 | DPRINTK("found ATA device by sig\n"); |
| 776 | return ATA_DEV_ATA; |
| 777 | } |
| 778 | |
| 779 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || |
| 780 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { |
| 781 | DPRINTK("found ATAPI device by sig\n"); |
| 782 | return ATA_DEV_ATAPI; |
| 783 | } |
| 784 | |
| 785 | DPRINTK("unknown device\n"); |
| 786 | return ATA_DEV_UNKNOWN; |
| 787 | } |
| 788 | |
| 789 | /** |
| 790 | * ata_dev_try_classify - Parse returned ATA device signature |
| 791 | * @ap: ATA channel to examine |
| 792 | * @device: Device to examine (starting at zero) |
| 793 | * |
| 794 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 795 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 796 | * shadow registers, indicating the results of device detection |
| 797 | * and diagnostics. |
| 798 | * |
| 799 | * Select the ATA device, and read the values from the ATA shadow |
| 800 | * registers. Then parse according to the Error register value, |
| 801 | * and the spec-defined values examined by ata_dev_classify(). |
| 802 | * |
| 803 | * LOCKING: |
| 804 | * caller. |
| 805 | */ |
| 806 | |
| 807 | static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device) |
| 808 | { |
| 809 | struct ata_device *dev = &ap->device[device]; |
| 810 | struct ata_taskfile tf; |
| 811 | unsigned int class; |
| 812 | u8 err; |
| 813 | |
| 814 | ap->ops->dev_select(ap, device); |
| 815 | |
| 816 | memset(&tf, 0, sizeof(tf)); |
| 817 | |
| 818 | err = ata_chk_err(ap); |
| 819 | ap->ops->tf_read(ap, &tf); |
| 820 | |
| 821 | dev->class = ATA_DEV_NONE; |
| 822 | |
| 823 | /* see if device passed diags */ |
| 824 | if (err == 1) |
| 825 | /* do nothing */ ; |
| 826 | else if ((device == 0) && (err == 0x81)) |
| 827 | /* do nothing */ ; |
| 828 | else |
| 829 | return err; |
| 830 | |
| 831 | /* determine if device if ATA or ATAPI */ |
| 832 | class = ata_dev_classify(&tf); |
| 833 | if (class == ATA_DEV_UNKNOWN) |
| 834 | return err; |
| 835 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
| 836 | return err; |
| 837 | |
| 838 | dev->class = class; |
| 839 | |
| 840 | return err; |
| 841 | } |
| 842 | |
| 843 | /** |
| 844 | * ata_dev_id_string - Convert IDENTIFY DEVICE page into string |
| 845 | * @id: IDENTIFY DEVICE results we will examine |
| 846 | * @s: string into which data is output |
| 847 | * @ofs: offset into identify device page |
| 848 | * @len: length of string to return. must be an even number. |
| 849 | * |
| 850 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 851 | * 16-bit chunks. Run through the string, and output each |
| 852 | * 8-bit chunk linearly, regardless of platform. |
| 853 | * |
| 854 | * LOCKING: |
| 855 | * caller. |
| 856 | */ |
| 857 | |
| 858 | void ata_dev_id_string(u16 *id, unsigned char *s, |
| 859 | unsigned int ofs, unsigned int len) |
| 860 | { |
| 861 | unsigned int c; |
| 862 | |
| 863 | while (len > 0) { |
| 864 | c = id[ofs] >> 8; |
| 865 | *s = c; |
| 866 | s++; |
| 867 | |
| 868 | c = id[ofs] & 0xff; |
| 869 | *s = c; |
| 870 | s++; |
| 871 | |
| 872 | ofs++; |
| 873 | len -= 2; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
| 878 | { |
| 879 | } |
| 880 | |
| 881 | /** |
| 882 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 883 | * @ap: ATA channel to manipulate |
| 884 | * @device: ATA device (numbered from zero) to select |
| 885 | * |
| 886 | * Use the method defined in the ATA specification to |
| 887 | * make either device 0, or device 1, active on the |
| 888 | * ATA channel. |
| 889 | * |
| 890 | * LOCKING: |
| 891 | * caller. |
| 892 | */ |
| 893 | |
| 894 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) |
| 895 | { |
| 896 | u8 tmp; |
| 897 | |
| 898 | if (device == 0) |
| 899 | tmp = ATA_DEVICE_OBS; |
| 900 | else |
| 901 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 902 | |
| 903 | if (ap->flags & ATA_FLAG_MMIO) { |
| 904 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); |
| 905 | } else { |
| 906 | outb(tmp, ap->ioaddr.device_addr); |
| 907 | } |
| 908 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 909 | } |
| 910 | |
| 911 | /** |
| 912 | * ata_dev_select - Select device 0/1 on ATA bus |
| 913 | * @ap: ATA channel to manipulate |
| 914 | * @device: ATA device (numbered from zero) to select |
| 915 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 916 | * @can_sleep: non-zero if context allows sleeping |
| 917 | * |
| 918 | * Use the method defined in the ATA specification to |
| 919 | * make either device 0, or device 1, active on the |
| 920 | * ATA channel. |
| 921 | * |
| 922 | * This is a high-level version of ata_std_dev_select(), |
| 923 | * which additionally provides the services of inserting |
| 924 | * the proper pauses and status polling, where needed. |
| 925 | * |
| 926 | * LOCKING: |
| 927 | * caller. |
| 928 | */ |
| 929 | |
| 930 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 931 | unsigned int wait, unsigned int can_sleep) |
| 932 | { |
| 933 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", |
| 934 | ap->id, device, wait); |
| 935 | |
| 936 | if (wait) |
| 937 | ata_wait_idle(ap); |
| 938 | |
| 939 | ap->ops->dev_select(ap, device); |
| 940 | |
| 941 | if (wait) { |
| 942 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) |
| 943 | msleep(150); |
| 944 | ata_wait_idle(ap); |
| 945 | } |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
| 950 | * @dev: Device whose IDENTIFY DEVICE page we will dump |
| 951 | * |
| 952 | * Dump selected 16-bit words from a detected device's |
| 953 | * IDENTIFY PAGE page. |
| 954 | * |
| 955 | * LOCKING: |
| 956 | * caller. |
| 957 | */ |
| 958 | |
| 959 | static inline void ata_dump_id(struct ata_device *dev) |
| 960 | { |
| 961 | DPRINTK("49==0x%04x " |
| 962 | "53==0x%04x " |
| 963 | "63==0x%04x " |
| 964 | "64==0x%04x " |
| 965 | "75==0x%04x \n", |
| 966 | dev->id[49], |
| 967 | dev->id[53], |
| 968 | dev->id[63], |
| 969 | dev->id[64], |
| 970 | dev->id[75]); |
| 971 | DPRINTK("80==0x%04x " |
| 972 | "81==0x%04x " |
| 973 | "82==0x%04x " |
| 974 | "83==0x%04x " |
| 975 | "84==0x%04x \n", |
| 976 | dev->id[80], |
| 977 | dev->id[81], |
| 978 | dev->id[82], |
| 979 | dev->id[83], |
| 980 | dev->id[84]); |
| 981 | DPRINTK("88==0x%04x " |
| 982 | "93==0x%04x\n", |
| 983 | dev->id[88], |
| 984 | dev->id[93]); |
| 985 | } |
| 986 | |
| 987 | /** |
| 988 | * ata_dev_identify - obtain IDENTIFY x DEVICE page |
| 989 | * @ap: port on which device we wish to probe resides |
| 990 | * @device: device bus address, starting at zero |
| 991 | * |
| 992 | * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE |
| 993 | * command, and read back the 512-byte device information page. |
| 994 | * The device information page is fed to us via the standard |
| 995 | * PIO-IN protocol, but we hand-code it here. (TODO: investigate |
| 996 | * using standard PIO-IN paths) |
| 997 | * |
| 998 | * After reading the device information page, we use several |
| 999 | * bits of information from it to initialize data structures |
| 1000 | * that will be used during the lifetime of the ata_device. |
| 1001 | * Other data from the info page is used to disqualify certain |
| 1002 | * older ATA devices we do not wish to support. |
| 1003 | * |
| 1004 | * LOCKING: |
| 1005 | * Inherited from caller. Some functions called by this function |
| 1006 | * obtain the host_set lock. |
| 1007 | */ |
| 1008 | |
| 1009 | static void ata_dev_identify(struct ata_port *ap, unsigned int device) |
| 1010 | { |
| 1011 | struct ata_device *dev = &ap->device[device]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1012 | unsigned int major_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | u16 tmp; |
| 1014 | unsigned long xfer_modes; |
| 1015 | u8 status; |
| 1016 | unsigned int using_edd; |
| 1017 | DECLARE_COMPLETION(wait); |
| 1018 | struct ata_queued_cmd *qc; |
| 1019 | unsigned long flags; |
| 1020 | int rc; |
| 1021 | |
| 1022 | if (!ata_dev_present(dev)) { |
| 1023 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
| 1024 | ap->id, device); |
| 1025 | return; |
| 1026 | } |
| 1027 | |
| 1028 | if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET)) |
| 1029 | using_edd = 0; |
| 1030 | else |
| 1031 | using_edd = 1; |
| 1032 | |
| 1033 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, device); |
| 1034 | |
| 1035 | assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI || |
| 1036 | dev->class == ATA_DEV_NONE); |
| 1037 | |
| 1038 | ata_dev_select(ap, device, 1, 1); /* select device 0/1 */ |
| 1039 | |
| 1040 | qc = ata_qc_new_init(ap, dev); |
| 1041 | BUG_ON(qc == NULL); |
| 1042 | |
| 1043 | ata_sg_init_one(qc, dev->id, sizeof(dev->id)); |
| 1044 | qc->dma_dir = DMA_FROM_DEVICE; |
| 1045 | qc->tf.protocol = ATA_PROT_PIO; |
| 1046 | qc->nsect = 1; |
| 1047 | |
| 1048 | retry: |
| 1049 | if (dev->class == ATA_DEV_ATA) { |
| 1050 | qc->tf.command = ATA_CMD_ID_ATA; |
| 1051 | DPRINTK("do ATA identify\n"); |
| 1052 | } else { |
| 1053 | qc->tf.command = ATA_CMD_ID_ATAPI; |
| 1054 | DPRINTK("do ATAPI identify\n"); |
| 1055 | } |
| 1056 | |
| 1057 | qc->waiting = &wait; |
| 1058 | qc->complete_fn = ata_qc_complete_noop; |
| 1059 | |
| 1060 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 1061 | rc = ata_qc_issue(qc); |
| 1062 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 1063 | |
| 1064 | if (rc) |
| 1065 | goto err_out; |
| 1066 | else |
| 1067 | wait_for_completion(&wait); |
| 1068 | |
| 1069 | status = ata_chk_status(ap); |
| 1070 | if (status & ATA_ERR) { |
| 1071 | /* |
| 1072 | * arg! EDD works for all test cases, but seems to return |
| 1073 | * the ATA signature for some ATAPI devices. Until the |
| 1074 | * reason for this is found and fixed, we fix up the mess |
| 1075 | * here. If IDENTIFY DEVICE returns command aborted |
| 1076 | * (as ATAPI devices do), then we issue an |
| 1077 | * IDENTIFY PACKET DEVICE. |
| 1078 | * |
| 1079 | * ATA software reset (SRST, the default) does not appear |
| 1080 | * to have this problem. |
| 1081 | */ |
| 1082 | if ((using_edd) && (qc->tf.command == ATA_CMD_ID_ATA)) { |
| 1083 | u8 err = ata_chk_err(ap); |
| 1084 | if (err & ATA_ABORTED) { |
| 1085 | dev->class = ATA_DEV_ATAPI; |
| 1086 | qc->cursg = 0; |
| 1087 | qc->cursg_ofs = 0; |
| 1088 | qc->cursect = 0; |
| 1089 | qc->nsect = 1; |
| 1090 | goto retry; |
| 1091 | } |
| 1092 | } |
| 1093 | goto err_out; |
| 1094 | } |
| 1095 | |
| 1096 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
| 1097 | |
| 1098 | /* print device capabilities */ |
| 1099 | printk(KERN_DEBUG "ata%u: dev %u cfg " |
| 1100 | "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", |
| 1101 | ap->id, device, dev->id[49], |
| 1102 | dev->id[82], dev->id[83], dev->id[84], |
| 1103 | dev->id[85], dev->id[86], dev->id[87], |
| 1104 | dev->id[88]); |
| 1105 | |
| 1106 | /* |
| 1107 | * common ATA, ATAPI feature tests |
| 1108 | */ |
| 1109 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1110 | /* we require DMA support (bits 8 of word 49) */ |
| 1111 | if (!ata_id_has_dma(dev->id)) { |
| 1112 | printk(KERN_DEBUG "ata%u: no dma\n", ap->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | goto err_out_nosup; |
| 1114 | } |
| 1115 | |
| 1116 | /* quick-n-dirty find max transfer mode; for printk only */ |
| 1117 | xfer_modes = dev->id[ATA_ID_UDMA_MODES]; |
| 1118 | if (!xfer_modes) |
| 1119 | xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA; |
| 1120 | if (!xfer_modes) { |
| 1121 | xfer_modes = (dev->id[ATA_ID_PIO_MODES]) << (ATA_SHIFT_PIO + 3); |
| 1122 | xfer_modes |= (0x7 << ATA_SHIFT_PIO); |
| 1123 | } |
| 1124 | |
| 1125 | ata_dump_id(dev); |
| 1126 | |
| 1127 | /* ATA-specific feature tests */ |
| 1128 | if (dev->class == ATA_DEV_ATA) { |
| 1129 | if (!ata_id_is_ata(dev->id)) /* sanity check */ |
| 1130 | goto err_out_nosup; |
| 1131 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1132 | /* get major version */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | tmp = dev->id[ATA_ID_MAJOR_VER]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1134 | for (major_version = 14; major_version >= 1; major_version--) |
| 1135 | if (tmp & (1 << major_version)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | break; |
| 1137 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1138 | /* |
| 1139 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 1140 | * SRST RESET |
| 1141 | * IDENTIFY |
| 1142 | * INITIALIZE DEVICE PARAMETERS |
| 1143 | * anything else.. |
| 1144 | * Some drives were very specific about that exact sequence. |
| 1145 | */ |
| 1146 | if (major_version < 4 || (!ata_id_has_lba(dev->id))) |
| 1147 | ata_dev_init_params(ap, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1149 | if (ata_id_has_lba(dev->id)) { |
| 1150 | dev->flags |= ATA_DFLAG_LBA; |
| 1151 | |
| 1152 | if (ata_id_has_lba48(dev->id)) { |
| 1153 | dev->flags |= ATA_DFLAG_LBA48; |
| 1154 | dev->n_sectors = ata_id_u64(dev->id, 100); |
| 1155 | } else { |
| 1156 | dev->n_sectors = ata_id_u32(dev->id, 60); |
| 1157 | } |
| 1158 | |
| 1159 | /* print device info to dmesg */ |
| 1160 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n", |
| 1161 | ap->id, device, |
| 1162 | major_version, |
| 1163 | ata_mode_string(xfer_modes), |
| 1164 | (unsigned long long)dev->n_sectors, |
| 1165 | dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA"); |
| 1166 | } else { |
| 1167 | /* CHS */ |
| 1168 | |
| 1169 | /* Default translation */ |
| 1170 | dev->cylinders = dev->id[1]; |
| 1171 | dev->heads = dev->id[3]; |
| 1172 | dev->sectors = dev->id[6]; |
| 1173 | dev->n_sectors = dev->cylinders * dev->heads * dev->sectors; |
| 1174 | |
| 1175 | if (ata_id_current_chs_valid(dev->id)) { |
| 1176 | /* Current CHS translation is valid. */ |
| 1177 | dev->cylinders = dev->id[54]; |
| 1178 | dev->heads = dev->id[55]; |
| 1179 | dev->sectors = dev->id[56]; |
| 1180 | |
| 1181 | dev->n_sectors = ata_id_u32(dev->id, 57); |
| 1182 | } |
| 1183 | |
| 1184 | /* print device info to dmesg */ |
| 1185 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n", |
| 1186 | ap->id, device, |
| 1187 | major_version, |
| 1188 | ata_mode_string(xfer_modes), |
| 1189 | (unsigned long long)dev->n_sectors, |
| 1190 | (int)dev->cylinders, (int)dev->heads, (int)dev->sectors); |
| 1191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
| 1194 | ap->host->max_cmd_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
| 1197 | /* ATAPI-specific feature tests */ |
| 1198 | else { |
| 1199 | if (ata_id_is_ata(dev->id)) /* sanity check */ |
| 1200 | goto err_out_nosup; |
| 1201 | |
| 1202 | rc = atapi_cdb_len(dev->id); |
| 1203 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
| 1204 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); |
| 1205 | goto err_out_nosup; |
| 1206 | } |
| 1207 | ap->cdb_len = (unsigned int) rc; |
| 1208 | ap->host->max_cmd_len = (unsigned char) ap->cdb_len; |
| 1209 | |
| 1210 | /* print device info to dmesg */ |
| 1211 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", |
| 1212 | ap->id, device, |
| 1213 | ata_mode_string(xfer_modes)); |
| 1214 | } |
| 1215 | |
| 1216 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
| 1217 | return; |
| 1218 | |
| 1219 | err_out_nosup: |
| 1220 | printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n", |
| 1221 | ap->id, device); |
| 1222 | err_out: |
| 1223 | dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */ |
| 1224 | DPRINTK("EXIT, err\n"); |
| 1225 | } |
| 1226 | |
| 1227 | /** |
| 1228 | * ata_bus_probe - Reset and probe ATA bus |
| 1229 | * @ap: Bus to probe |
| 1230 | * |
| 1231 | * LOCKING: |
| 1232 | * |
| 1233 | * RETURNS: |
| 1234 | * Zero on success, non-zero on error. |
| 1235 | */ |
| 1236 | |
| 1237 | static int ata_bus_probe(struct ata_port *ap) |
| 1238 | { |
| 1239 | unsigned int i, found = 0; |
| 1240 | |
| 1241 | ap->ops->phy_reset(ap); |
| 1242 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1243 | goto err_out; |
| 1244 | |
| 1245 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1246 | ata_dev_identify(ap, i); |
| 1247 | if (ata_dev_present(&ap->device[i])) { |
| 1248 | found = 1; |
| 1249 | if (ap->ops->dev_config) |
| 1250 | ap->ops->dev_config(ap, &ap->device[i]); |
| 1251 | } |
| 1252 | } |
| 1253 | |
| 1254 | if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1255 | goto err_out_disable; |
| 1256 | |
| 1257 | ata_set_mode(ap); |
| 1258 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1259 | goto err_out_disable; |
| 1260 | |
| 1261 | return 0; |
| 1262 | |
| 1263 | err_out_disable: |
| 1264 | ap->ops->port_disable(ap); |
| 1265 | err_out: |
| 1266 | return -1; |
| 1267 | } |
| 1268 | |
| 1269 | /** |
| 1270 | * ata_port_probe - |
| 1271 | * @ap: |
| 1272 | * |
| 1273 | * LOCKING: |
| 1274 | */ |
| 1275 | |
| 1276 | void ata_port_probe(struct ata_port *ap) |
| 1277 | { |
| 1278 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; |
| 1279 | } |
| 1280 | |
| 1281 | /** |
| 1282 | * __sata_phy_reset - |
| 1283 | * @ap: |
| 1284 | * |
| 1285 | * LOCKING: |
| 1286 | * |
| 1287 | */ |
| 1288 | void __sata_phy_reset(struct ata_port *ap) |
| 1289 | { |
| 1290 | u32 sstatus; |
| 1291 | unsigned long timeout = jiffies + (HZ * 5); |
| 1292 | |
| 1293 | if (ap->flags & ATA_FLAG_SATA_RESET) { |
| 1294 | scr_write(ap, SCR_CONTROL, 0x301); /* issue phy wake/reset */ |
| 1295 | scr_read(ap, SCR_STATUS); /* dummy read; flush */ |
| 1296 | udelay(400); /* FIXME: a guess */ |
| 1297 | } |
| 1298 | scr_write(ap, SCR_CONTROL, 0x300); /* issue phy wake/clear reset */ |
| 1299 | |
| 1300 | /* wait for phy to become ready, if necessary */ |
| 1301 | do { |
| 1302 | msleep(200); |
| 1303 | sstatus = scr_read(ap, SCR_STATUS); |
| 1304 | if ((sstatus & 0xf) != 1) |
| 1305 | break; |
| 1306 | } while (time_before(jiffies, timeout)); |
| 1307 | |
| 1308 | /* TODO: phy layer with polling, timeouts, etc. */ |
| 1309 | if (sata_dev_present(ap)) |
| 1310 | ata_port_probe(ap); |
| 1311 | else { |
| 1312 | sstatus = scr_read(ap, SCR_STATUS); |
| 1313 | printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n", |
| 1314 | ap->id, sstatus); |
| 1315 | ata_port_disable(ap); |
| 1316 | } |
| 1317 | |
| 1318 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1319 | return; |
| 1320 | |
| 1321 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
| 1322 | ata_port_disable(ap); |
| 1323 | return; |
| 1324 | } |
| 1325 | |
| 1326 | ap->cbl = ATA_CBL_SATA; |
| 1327 | } |
| 1328 | |
| 1329 | /** |
| 1330 | * __sata_phy_reset - |
| 1331 | * @ap: |
| 1332 | * |
| 1333 | * LOCKING: |
| 1334 | * |
| 1335 | */ |
| 1336 | void sata_phy_reset(struct ata_port *ap) |
| 1337 | { |
| 1338 | __sata_phy_reset(ap); |
| 1339 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1340 | return; |
| 1341 | ata_bus_reset(ap); |
| 1342 | } |
| 1343 | |
| 1344 | /** |
| 1345 | * ata_port_disable - |
| 1346 | * @ap: |
| 1347 | * |
| 1348 | * LOCKING: |
| 1349 | */ |
| 1350 | |
| 1351 | void ata_port_disable(struct ata_port *ap) |
| 1352 | { |
| 1353 | ap->device[0].class = ATA_DEV_NONE; |
| 1354 | ap->device[1].class = ATA_DEV_NONE; |
| 1355 | ap->flags |= ATA_FLAG_PORT_DISABLED; |
| 1356 | } |
| 1357 | |
| 1358 | static struct { |
| 1359 | unsigned int shift; |
| 1360 | u8 base; |
| 1361 | } xfer_mode_classes[] = { |
| 1362 | { ATA_SHIFT_UDMA, XFER_UDMA_0 }, |
| 1363 | { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 }, |
| 1364 | { ATA_SHIFT_PIO, XFER_PIO_0 }, |
| 1365 | }; |
| 1366 | |
| 1367 | static inline u8 base_from_shift(unsigned int shift) |
| 1368 | { |
| 1369 | int i; |
| 1370 | |
| 1371 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) |
| 1372 | if (xfer_mode_classes[i].shift == shift) |
| 1373 | return xfer_mode_classes[i].base; |
| 1374 | |
| 1375 | return 0xff; |
| 1376 | } |
| 1377 | |
| 1378 | static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
| 1379 | { |
| 1380 | int ofs, idx; |
| 1381 | u8 base; |
| 1382 | |
| 1383 | if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1384 | return; |
| 1385 | |
| 1386 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 1387 | dev->flags |= ATA_DFLAG_PIO; |
| 1388 | |
| 1389 | ata_dev_set_xfermode(ap, dev); |
| 1390 | |
| 1391 | base = base_from_shift(dev->xfer_shift); |
| 1392 | ofs = dev->xfer_mode - base; |
| 1393 | idx = ofs + dev->xfer_shift; |
| 1394 | WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str)); |
| 1395 | |
| 1396 | DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n", |
| 1397 | idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs); |
| 1398 | |
| 1399 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", |
| 1400 | ap->id, dev->devno, xfer_mode_str[idx]); |
| 1401 | } |
| 1402 | |
| 1403 | static int ata_host_set_pio(struct ata_port *ap) |
| 1404 | { |
| 1405 | unsigned int mask; |
| 1406 | int x, i; |
| 1407 | u8 base, xfer_mode; |
| 1408 | |
| 1409 | mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO); |
| 1410 | x = fgb(mask); |
| 1411 | if (x < 0) { |
| 1412 | printk(KERN_WARNING "ata%u: no PIO support\n", ap->id); |
| 1413 | return -1; |
| 1414 | } |
| 1415 | |
| 1416 | base = base_from_shift(ATA_SHIFT_PIO); |
| 1417 | xfer_mode = base + x; |
| 1418 | |
| 1419 | DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n", |
| 1420 | (int)base, (int)xfer_mode, mask, x); |
| 1421 | |
| 1422 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1423 | struct ata_device *dev = &ap->device[i]; |
| 1424 | if (ata_dev_present(dev)) { |
| 1425 | dev->pio_mode = xfer_mode; |
| 1426 | dev->xfer_mode = xfer_mode; |
| 1427 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 1428 | if (ap->ops->set_piomode) |
| 1429 | ap->ops->set_piomode(ap, dev); |
| 1430 | } |
| 1431 | } |
| 1432 | |
| 1433 | return 0; |
| 1434 | } |
| 1435 | |
| 1436 | static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode, |
| 1437 | unsigned int xfer_shift) |
| 1438 | { |
| 1439 | int i; |
| 1440 | |
| 1441 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1442 | struct ata_device *dev = &ap->device[i]; |
| 1443 | if (ata_dev_present(dev)) { |
| 1444 | dev->dma_mode = xfer_mode; |
| 1445 | dev->xfer_mode = xfer_mode; |
| 1446 | dev->xfer_shift = xfer_shift; |
| 1447 | if (ap->ops->set_dmamode) |
| 1448 | ap->ops->set_dmamode(ap, dev); |
| 1449 | } |
| 1450 | } |
| 1451 | } |
| 1452 | |
| 1453 | /** |
| 1454 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 1455 | * @ap: port on which timings will be programmed |
| 1456 | * |
| 1457 | * LOCKING: |
| 1458 | * |
| 1459 | */ |
| 1460 | static void ata_set_mode(struct ata_port *ap) |
| 1461 | { |
| 1462 | unsigned int i, xfer_shift; |
| 1463 | u8 xfer_mode; |
| 1464 | int rc; |
| 1465 | |
| 1466 | /* step 1: always set host PIO timings */ |
| 1467 | rc = ata_host_set_pio(ap); |
| 1468 | if (rc) |
| 1469 | goto err_out; |
| 1470 | |
| 1471 | /* step 2: choose the best data xfer mode */ |
| 1472 | xfer_mode = xfer_shift = 0; |
| 1473 | rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift); |
| 1474 | if (rc) |
| 1475 | goto err_out; |
| 1476 | |
| 1477 | /* step 3: if that xfer mode isn't PIO, set host DMA timings */ |
| 1478 | if (xfer_shift != ATA_SHIFT_PIO) |
| 1479 | ata_host_set_dma(ap, xfer_mode, xfer_shift); |
| 1480 | |
| 1481 | /* step 4: update devices' xfer mode */ |
| 1482 | ata_dev_set_mode(ap, &ap->device[0]); |
| 1483 | ata_dev_set_mode(ap, &ap->device[1]); |
| 1484 | |
| 1485 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1486 | return; |
| 1487 | |
| 1488 | if (ap->ops->post_set_mode) |
| 1489 | ap->ops->post_set_mode(ap); |
| 1490 | |
| 1491 | for (i = 0; i < 2; i++) { |
| 1492 | struct ata_device *dev = &ap->device[i]; |
| 1493 | ata_dev_set_protocol(dev); |
| 1494 | } |
| 1495 | |
| 1496 | return; |
| 1497 | |
| 1498 | err_out: |
| 1499 | ata_port_disable(ap); |
| 1500 | } |
| 1501 | |
| 1502 | /** |
| 1503 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 1504 | * @ap: port containing status register to be polled |
| 1505 | * @tmout_pat: impatience timeout |
| 1506 | * @tmout: overall timeout |
| 1507 | * |
| 1508 | * LOCKING: |
| 1509 | * |
| 1510 | */ |
| 1511 | |
| 1512 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 1513 | unsigned long tmout_pat, |
| 1514 | unsigned long tmout) |
| 1515 | { |
| 1516 | unsigned long timer_start, timeout; |
| 1517 | u8 status; |
| 1518 | |
| 1519 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 1520 | timer_start = jiffies; |
| 1521 | timeout = timer_start + tmout_pat; |
| 1522 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1523 | msleep(50); |
| 1524 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 1525 | } |
| 1526 | |
| 1527 | if (status & ATA_BUSY) |
| 1528 | printk(KERN_WARNING "ata%u is slow to respond, " |
| 1529 | "please be patient\n", ap->id); |
| 1530 | |
| 1531 | timeout = timer_start + tmout; |
| 1532 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1533 | msleep(50); |
| 1534 | status = ata_chk_status(ap); |
| 1535 | } |
| 1536 | |
| 1537 | if (status & ATA_BUSY) { |
| 1538 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", |
| 1539 | ap->id, tmout / HZ); |
| 1540 | return 1; |
| 1541 | } |
| 1542 | |
| 1543 | return 0; |
| 1544 | } |
| 1545 | |
| 1546 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) |
| 1547 | { |
| 1548 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1549 | unsigned int dev0 = devmask & (1 << 0); |
| 1550 | unsigned int dev1 = devmask & (1 << 1); |
| 1551 | unsigned long timeout; |
| 1552 | |
| 1553 | /* if device 0 was found in ata_devchk, wait for its |
| 1554 | * BSY bit to clear |
| 1555 | */ |
| 1556 | if (dev0) |
| 1557 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1558 | |
| 1559 | /* if device 1 was found in ata_devchk, wait for |
| 1560 | * register access, then wait for BSY to clear |
| 1561 | */ |
| 1562 | timeout = jiffies + ATA_TMOUT_BOOT; |
| 1563 | while (dev1) { |
| 1564 | u8 nsect, lbal; |
| 1565 | |
| 1566 | ap->ops->dev_select(ap, 1); |
| 1567 | if (ap->flags & ATA_FLAG_MMIO) { |
| 1568 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 1569 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 1570 | } else { |
| 1571 | nsect = inb(ioaddr->nsect_addr); |
| 1572 | lbal = inb(ioaddr->lbal_addr); |
| 1573 | } |
| 1574 | if ((nsect == 1) && (lbal == 1)) |
| 1575 | break; |
| 1576 | if (time_after(jiffies, timeout)) { |
| 1577 | dev1 = 0; |
| 1578 | break; |
| 1579 | } |
| 1580 | msleep(50); /* give drive a breather */ |
| 1581 | } |
| 1582 | if (dev1) |
| 1583 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1584 | |
| 1585 | /* is all this really necessary? */ |
| 1586 | ap->ops->dev_select(ap, 0); |
| 1587 | if (dev1) |
| 1588 | ap->ops->dev_select(ap, 1); |
| 1589 | if (dev0) |
| 1590 | ap->ops->dev_select(ap, 0); |
| 1591 | } |
| 1592 | |
| 1593 | /** |
| 1594 | * ata_bus_edd - |
| 1595 | * @ap: |
| 1596 | * |
| 1597 | * LOCKING: |
| 1598 | * |
| 1599 | */ |
| 1600 | |
| 1601 | static unsigned int ata_bus_edd(struct ata_port *ap) |
| 1602 | { |
| 1603 | struct ata_taskfile tf; |
| 1604 | |
| 1605 | /* set up execute-device-diag (bus reset) taskfile */ |
| 1606 | /* also, take interrupts to a known state (disabled) */ |
| 1607 | DPRINTK("execute-device-diag\n"); |
| 1608 | ata_tf_init(ap, &tf, 0); |
| 1609 | tf.ctl |= ATA_NIEN; |
| 1610 | tf.command = ATA_CMD_EDD; |
| 1611 | tf.protocol = ATA_PROT_NODATA; |
| 1612 | |
| 1613 | /* do bus reset */ |
| 1614 | ata_tf_to_host(ap, &tf); |
| 1615 | |
| 1616 | /* spec says at least 2ms. but who knows with those |
| 1617 | * crazy ATAPI devices... |
| 1618 | */ |
| 1619 | msleep(150); |
| 1620 | |
| 1621 | return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1622 | } |
| 1623 | |
| 1624 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
| 1625 | unsigned int devmask) |
| 1626 | { |
| 1627 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1628 | |
| 1629 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); |
| 1630 | |
| 1631 | /* software reset. causes dev0 to be selected */ |
| 1632 | if (ap->flags & ATA_FLAG_MMIO) { |
| 1633 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1634 | udelay(20); /* FIXME: flush */ |
| 1635 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); |
| 1636 | udelay(20); /* FIXME: flush */ |
| 1637 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1638 | } else { |
| 1639 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1640 | udelay(10); |
| 1641 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 1642 | udelay(10); |
| 1643 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1644 | } |
| 1645 | |
| 1646 | /* spec mandates ">= 2ms" before checking status. |
| 1647 | * We wait 150ms, because that was the magic delay used for |
| 1648 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 1649 | * between when the ATA command register is written, and then |
| 1650 | * status is checked. Because waiting for "a while" before |
| 1651 | * checking status is fine, post SRST, we perform this magic |
| 1652 | * delay here as well. |
| 1653 | */ |
| 1654 | msleep(150); |
| 1655 | |
| 1656 | ata_bus_post_reset(ap, devmask); |
| 1657 | |
| 1658 | return 0; |
| 1659 | } |
| 1660 | |
| 1661 | /** |
| 1662 | * ata_bus_reset - reset host port and associated ATA channel |
| 1663 | * @ap: port to reset |
| 1664 | * |
| 1665 | * This is typically the first time we actually start issuing |
| 1666 | * commands to the ATA channel. We wait for BSY to clear, then |
| 1667 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 1668 | * result. Determine what devices, if any, are on the channel |
| 1669 | * by looking at the device 0/1 error register. Look at the signature |
| 1670 | * stored in each device's taskfile registers, to determine if |
| 1671 | * the device is ATA or ATAPI. |
| 1672 | * |
| 1673 | * LOCKING: |
| 1674 | * Inherited from caller. Some functions called by this function |
| 1675 | * obtain the host_set lock. |
| 1676 | * |
| 1677 | * SIDE EFFECTS: |
| 1678 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. |
| 1679 | */ |
| 1680 | |
| 1681 | void ata_bus_reset(struct ata_port *ap) |
| 1682 | { |
| 1683 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1684 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 1685 | u8 err; |
| 1686 | unsigned int dev0, dev1 = 0, rc = 0, devmask = 0; |
| 1687 | |
| 1688 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); |
| 1689 | |
| 1690 | /* determine if device 0/1 are present */ |
| 1691 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 1692 | dev0 = 1; |
| 1693 | else { |
| 1694 | dev0 = ata_devchk(ap, 0); |
| 1695 | if (slave_possible) |
| 1696 | dev1 = ata_devchk(ap, 1); |
| 1697 | } |
| 1698 | |
| 1699 | if (dev0) |
| 1700 | devmask |= (1 << 0); |
| 1701 | if (dev1) |
| 1702 | devmask |= (1 << 1); |
| 1703 | |
| 1704 | /* select device 0 again */ |
| 1705 | ap->ops->dev_select(ap, 0); |
| 1706 | |
| 1707 | /* issue bus reset */ |
| 1708 | if (ap->flags & ATA_FLAG_SRST) |
| 1709 | rc = ata_bus_softreset(ap, devmask); |
| 1710 | else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) { |
| 1711 | /* set up device control */ |
| 1712 | if (ap->flags & ATA_FLAG_MMIO) |
| 1713 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1714 | else |
| 1715 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1716 | rc = ata_bus_edd(ap); |
| 1717 | } |
| 1718 | |
| 1719 | if (rc) |
| 1720 | goto err_out; |
| 1721 | |
| 1722 | /* |
| 1723 | * determine by signature whether we have ATA or ATAPI devices |
| 1724 | */ |
| 1725 | err = ata_dev_try_classify(ap, 0); |
| 1726 | if ((slave_possible) && (err != 0x81)) |
| 1727 | ata_dev_try_classify(ap, 1); |
| 1728 | |
| 1729 | /* re-enable interrupts */ |
| 1730 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ |
| 1731 | ata_irq_on(ap); |
| 1732 | |
| 1733 | /* is double-select really necessary? */ |
| 1734 | if (ap->device[1].class != ATA_DEV_NONE) |
| 1735 | ap->ops->dev_select(ap, 1); |
| 1736 | if (ap->device[0].class != ATA_DEV_NONE) |
| 1737 | ap->ops->dev_select(ap, 0); |
| 1738 | |
| 1739 | /* if no devices were detected, disable this port */ |
| 1740 | if ((ap->device[0].class == ATA_DEV_NONE) && |
| 1741 | (ap->device[1].class == ATA_DEV_NONE)) |
| 1742 | goto err_out; |
| 1743 | |
| 1744 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 1745 | /* set up device control for ATA_FLAG_SATA_RESET */ |
| 1746 | if (ap->flags & ATA_FLAG_MMIO) |
| 1747 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1748 | else |
| 1749 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1750 | } |
| 1751 | |
| 1752 | DPRINTK("EXIT\n"); |
| 1753 | return; |
| 1754 | |
| 1755 | err_out: |
| 1756 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); |
| 1757 | ap->ops->port_disable(ap); |
| 1758 | |
| 1759 | DPRINTK("EXIT\n"); |
| 1760 | } |
| 1761 | |
| 1762 | static void ata_pr_blacklisted(struct ata_port *ap, struct ata_device *dev) |
| 1763 | { |
| 1764 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", |
| 1765 | ap->id, dev->devno); |
| 1766 | } |
| 1767 | |
| 1768 | static const char * ata_dma_blacklist [] = { |
| 1769 | "WDC AC11000H", |
| 1770 | "WDC AC22100H", |
| 1771 | "WDC AC32500H", |
| 1772 | "WDC AC33100H", |
| 1773 | "WDC AC31600H", |
| 1774 | "WDC AC32100H", |
| 1775 | "WDC AC23200L", |
| 1776 | "Compaq CRD-8241B", |
| 1777 | "CRD-8400B", |
| 1778 | "CRD-8480B", |
| 1779 | "CRD-8482B", |
| 1780 | "CRD-84", |
| 1781 | "SanDisk SDP3B", |
| 1782 | "SanDisk SDP3B-64", |
| 1783 | "SANYO CD-ROM CRD", |
| 1784 | "HITACHI CDR-8", |
| 1785 | "HITACHI CDR-8335", |
| 1786 | "HITACHI CDR-8435", |
| 1787 | "Toshiba CD-ROM XM-6202B", |
| 1788 | "CD-532E-A", |
| 1789 | "E-IDE CD-ROM CR-840", |
| 1790 | "CD-ROM Drive/F5A", |
| 1791 | "WPI CDD-820", |
| 1792 | "SAMSUNG CD-ROM SC-148C", |
| 1793 | "SAMSUNG CD-ROM SC", |
| 1794 | "SanDisk SDP3B-64", |
| 1795 | "SAMSUNG CD-ROM SN-124", |
| 1796 | "ATAPI CD-ROM DRIVE 40X MAXIMUM", |
| 1797 | "_NEC DV5800A", |
| 1798 | }; |
| 1799 | |
| 1800 | static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) |
| 1801 | { |
| 1802 | unsigned char model_num[40]; |
| 1803 | char *s; |
| 1804 | unsigned int len; |
| 1805 | int i; |
| 1806 | |
| 1807 | ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
| 1808 | sizeof(model_num)); |
| 1809 | s = &model_num[0]; |
| 1810 | len = strnlen(s, sizeof(model_num)); |
| 1811 | |
| 1812 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ |
| 1813 | while ((len > 0) && (s[len - 1] == ' ')) { |
| 1814 | len--; |
| 1815 | s[len] = 0; |
| 1816 | } |
| 1817 | |
| 1818 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++) |
| 1819 | if (!strncmp(ata_dma_blacklist[i], s, len)) |
| 1820 | return 1; |
| 1821 | |
| 1822 | return 0; |
| 1823 | } |
| 1824 | |
| 1825 | static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) |
| 1826 | { |
| 1827 | struct ata_device *master, *slave; |
| 1828 | unsigned int mask; |
| 1829 | |
| 1830 | master = &ap->device[0]; |
| 1831 | slave = &ap->device[1]; |
| 1832 | |
| 1833 | assert (ata_dev_present(master) || ata_dev_present(slave)); |
| 1834 | |
| 1835 | if (shift == ATA_SHIFT_UDMA) { |
| 1836 | mask = ap->udma_mask; |
| 1837 | if (ata_dev_present(master)) { |
| 1838 | mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); |
| 1839 | if (ata_dma_blacklisted(ap, master)) { |
| 1840 | mask = 0; |
| 1841 | ata_pr_blacklisted(ap, master); |
| 1842 | } |
| 1843 | } |
| 1844 | if (ata_dev_present(slave)) { |
| 1845 | mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); |
| 1846 | if (ata_dma_blacklisted(ap, slave)) { |
| 1847 | mask = 0; |
| 1848 | ata_pr_blacklisted(ap, slave); |
| 1849 | } |
| 1850 | } |
| 1851 | } |
| 1852 | else if (shift == ATA_SHIFT_MWDMA) { |
| 1853 | mask = ap->mwdma_mask; |
| 1854 | if (ata_dev_present(master)) { |
| 1855 | mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); |
| 1856 | if (ata_dma_blacklisted(ap, master)) { |
| 1857 | mask = 0; |
| 1858 | ata_pr_blacklisted(ap, master); |
| 1859 | } |
| 1860 | } |
| 1861 | if (ata_dev_present(slave)) { |
| 1862 | mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); |
| 1863 | if (ata_dma_blacklisted(ap, slave)) { |
| 1864 | mask = 0; |
| 1865 | ata_pr_blacklisted(ap, slave); |
| 1866 | } |
| 1867 | } |
| 1868 | } |
| 1869 | else if (shift == ATA_SHIFT_PIO) { |
| 1870 | mask = ap->pio_mask; |
| 1871 | if (ata_dev_present(master)) { |
| 1872 | /* spec doesn't return explicit support for |
| 1873 | * PIO0-2, so we fake it |
| 1874 | */ |
| 1875 | u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03; |
| 1876 | tmp_mode <<= 3; |
| 1877 | tmp_mode |= 0x7; |
| 1878 | mask &= tmp_mode; |
| 1879 | } |
| 1880 | if (ata_dev_present(slave)) { |
| 1881 | /* spec doesn't return explicit support for |
| 1882 | * PIO0-2, so we fake it |
| 1883 | */ |
| 1884 | u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03; |
| 1885 | tmp_mode <<= 3; |
| 1886 | tmp_mode |= 0x7; |
| 1887 | mask &= tmp_mode; |
| 1888 | } |
| 1889 | } |
| 1890 | else { |
| 1891 | mask = 0xffffffff; /* shut up compiler warning */ |
| 1892 | BUG(); |
| 1893 | } |
| 1894 | |
| 1895 | return mask; |
| 1896 | } |
| 1897 | |
| 1898 | /* find greatest bit */ |
| 1899 | static int fgb(u32 bitmap) |
| 1900 | { |
| 1901 | unsigned int i; |
| 1902 | int x = -1; |
| 1903 | |
| 1904 | for (i = 0; i < 32; i++) |
| 1905 | if (bitmap & (1 << i)) |
| 1906 | x = i; |
| 1907 | |
| 1908 | return x; |
| 1909 | } |
| 1910 | |
| 1911 | /** |
| 1912 | * ata_choose_xfer_mode - attempt to find best transfer mode |
| 1913 | * @ap: Port for which an xfer mode will be selected |
| 1914 | * @xfer_mode_out: (output) SET FEATURES - XFER MODE code |
| 1915 | * @xfer_shift_out: (output) bit shift that selects this mode |
| 1916 | * |
| 1917 | * LOCKING: |
| 1918 | * |
| 1919 | * RETURNS: |
| 1920 | * Zero on success, negative on error. |
| 1921 | */ |
| 1922 | |
| 1923 | static int ata_choose_xfer_mode(struct ata_port *ap, |
| 1924 | u8 *xfer_mode_out, |
| 1925 | unsigned int *xfer_shift_out) |
| 1926 | { |
| 1927 | unsigned int mask, shift; |
| 1928 | int x, i; |
| 1929 | |
| 1930 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) { |
| 1931 | shift = xfer_mode_classes[i].shift; |
| 1932 | mask = ata_get_mode_mask(ap, shift); |
| 1933 | |
| 1934 | x = fgb(mask); |
| 1935 | if (x >= 0) { |
| 1936 | *xfer_mode_out = xfer_mode_classes[i].base + x; |
| 1937 | *xfer_shift_out = shift; |
| 1938 | return 0; |
| 1939 | } |
| 1940 | } |
| 1941 | |
| 1942 | return -1; |
| 1943 | } |
| 1944 | |
| 1945 | /** |
| 1946 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
| 1947 | * @ap: Port associated with device @dev |
| 1948 | * @dev: Device to which command will be sent |
| 1949 | * |
| 1950 | * LOCKING: |
| 1951 | */ |
| 1952 | |
| 1953 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) |
| 1954 | { |
| 1955 | DECLARE_COMPLETION(wait); |
| 1956 | struct ata_queued_cmd *qc; |
| 1957 | int rc; |
| 1958 | unsigned long flags; |
| 1959 | |
| 1960 | /* set up set-features taskfile */ |
| 1961 | DPRINTK("set features - xfer mode\n"); |
| 1962 | |
| 1963 | qc = ata_qc_new_init(ap, dev); |
| 1964 | BUG_ON(qc == NULL); |
| 1965 | |
| 1966 | qc->tf.command = ATA_CMD_SET_FEATURES; |
| 1967 | qc->tf.feature = SETFEATURES_XFER; |
| 1968 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1969 | qc->tf.protocol = ATA_PROT_NODATA; |
| 1970 | qc->tf.nsect = dev->xfer_mode; |
| 1971 | |
| 1972 | qc->waiting = &wait; |
| 1973 | qc->complete_fn = ata_qc_complete_noop; |
| 1974 | |
| 1975 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 1976 | rc = ata_qc_issue(qc); |
| 1977 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 1978 | |
| 1979 | if (rc) |
| 1980 | ata_port_disable(ap); |
| 1981 | else |
| 1982 | wait_for_completion(&wait); |
| 1983 | |
| 1984 | DPRINTK("EXIT\n"); |
| 1985 | } |
| 1986 | |
| 1987 | /** |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 1988 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
| 1989 | * @ap: Port associated with device @dev |
| 1990 | * @dev: Device to which command will be sent |
| 1991 | * |
| 1992 | * LOCKING: |
| 1993 | */ |
| 1994 | |
| 1995 | static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev) |
| 1996 | { |
| 1997 | DECLARE_COMPLETION(wait); |
| 1998 | struct ata_queued_cmd *qc; |
| 1999 | int rc; |
| 2000 | unsigned long flags; |
| 2001 | u16 sectors = dev->id[6]; |
| 2002 | u16 heads = dev->id[3]; |
| 2003 | |
| 2004 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 2005 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
| 2006 | return; |
| 2007 | |
| 2008 | /* set up init dev params taskfile */ |
| 2009 | DPRINTK("init dev params \n"); |
| 2010 | |
| 2011 | qc = ata_qc_new_init(ap, dev); |
| 2012 | BUG_ON(qc == NULL); |
| 2013 | |
| 2014 | qc->tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 2015 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2016 | qc->tf.protocol = ATA_PROT_NODATA; |
| 2017 | qc->tf.nsect = sectors; |
| 2018 | qc->tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
| 2019 | |
| 2020 | qc->waiting = &wait; |
| 2021 | qc->complete_fn = ata_qc_complete_noop; |
| 2022 | |
| 2023 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2024 | rc = ata_qc_issue(qc); |
| 2025 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2026 | |
| 2027 | if (rc) |
| 2028 | ata_port_disable(ap); |
| 2029 | else |
| 2030 | wait_for_completion(&wait); |
| 2031 | |
| 2032 | DPRINTK("EXIT\n"); |
| 2033 | } |
| 2034 | |
| 2035 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | * ata_sg_clean - |
| 2037 | * @qc: |
| 2038 | * |
| 2039 | * LOCKING: |
| 2040 | */ |
| 2041 | |
| 2042 | static void ata_sg_clean(struct ata_queued_cmd *qc) |
| 2043 | { |
| 2044 | struct ata_port *ap = qc->ap; |
| 2045 | struct scatterlist *sg = qc->sg; |
| 2046 | int dir = qc->dma_dir; |
| 2047 | |
| 2048 | assert(qc->flags & ATA_QCFLAG_DMAMAP); |
| 2049 | assert(sg != NULL); |
| 2050 | |
| 2051 | if (qc->flags & ATA_QCFLAG_SINGLE) |
| 2052 | assert(qc->n_elem == 1); |
| 2053 | |
| 2054 | DPRINTK("unmapping %u sg elements\n", qc->n_elem); |
| 2055 | |
| 2056 | if (qc->flags & ATA_QCFLAG_SG) |
| 2057 | dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir); |
| 2058 | else |
| 2059 | dma_unmap_single(ap->host_set->dev, sg_dma_address(&sg[0]), |
| 2060 | sg_dma_len(&sg[0]), dir); |
| 2061 | |
| 2062 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 2063 | qc->sg = NULL; |
| 2064 | } |
| 2065 | |
| 2066 | /** |
| 2067 | * ata_fill_sg - Fill PCI IDE PRD table |
| 2068 | * @qc: Metadata associated with taskfile to be transferred |
| 2069 | * |
| 2070 | * LOCKING: |
| 2071 | * |
| 2072 | */ |
| 2073 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 2074 | { |
| 2075 | struct scatterlist *sg = qc->sg; |
| 2076 | struct ata_port *ap = qc->ap; |
| 2077 | unsigned int idx, nelem; |
| 2078 | |
| 2079 | assert(sg != NULL); |
| 2080 | assert(qc->n_elem > 0); |
| 2081 | |
| 2082 | idx = 0; |
| 2083 | for (nelem = qc->n_elem; nelem; nelem--,sg++) { |
| 2084 | u32 addr, offset; |
| 2085 | u32 sg_len, len; |
| 2086 | |
| 2087 | /* determine if physical DMA addr spans 64K boundary. |
| 2088 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2089 | * truncate dma_addr_t to u32. |
| 2090 | */ |
| 2091 | addr = (u32) sg_dma_address(sg); |
| 2092 | sg_len = sg_dma_len(sg); |
| 2093 | |
| 2094 | while (sg_len) { |
| 2095 | offset = addr & 0xffff; |
| 2096 | len = sg_len; |
| 2097 | if ((offset + sg_len) > 0x10000) |
| 2098 | len = 0x10000 - offset; |
| 2099 | |
| 2100 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 2101 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); |
| 2102 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 2103 | |
| 2104 | idx++; |
| 2105 | sg_len -= len; |
| 2106 | addr += len; |
| 2107 | } |
| 2108 | } |
| 2109 | |
| 2110 | if (idx) |
| 2111 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 2112 | } |
| 2113 | /** |
| 2114 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 2115 | * @qc: Metadata associated with taskfile to check |
| 2116 | * |
| 2117 | * LOCKING: |
| 2118 | * RETURNS: 0 when ATAPI DMA can be used |
| 2119 | * nonzero otherwise |
| 2120 | */ |
| 2121 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 2122 | { |
| 2123 | struct ata_port *ap = qc->ap; |
| 2124 | int rc = 0; /* Assume ATAPI DMA is OK by default */ |
| 2125 | |
| 2126 | if (ap->ops->check_atapi_dma) |
| 2127 | rc = ap->ops->check_atapi_dma(qc); |
| 2128 | |
| 2129 | return rc; |
| 2130 | } |
| 2131 | /** |
| 2132 | * ata_qc_prep - Prepare taskfile for submission |
| 2133 | * @qc: Metadata associated with taskfile to be prepared |
| 2134 | * |
| 2135 | * LOCKING: |
| 2136 | * spin_lock_irqsave(host_set lock) |
| 2137 | */ |
| 2138 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 2139 | { |
| 2140 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2141 | return; |
| 2142 | |
| 2143 | ata_fill_sg(qc); |
| 2144 | } |
| 2145 | |
| 2146 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
| 2147 | { |
| 2148 | struct scatterlist *sg; |
| 2149 | |
| 2150 | qc->flags |= ATA_QCFLAG_SINGLE; |
| 2151 | |
| 2152 | memset(&qc->sgent, 0, sizeof(qc->sgent)); |
| 2153 | qc->sg = &qc->sgent; |
| 2154 | qc->n_elem = 1; |
| 2155 | qc->buf_virt = buf; |
| 2156 | |
| 2157 | sg = qc->sg; |
| 2158 | sg->page = virt_to_page(buf); |
| 2159 | sg->offset = (unsigned long) buf & ~PAGE_MASK; |
| 2160 | sg_dma_len(sg) = buflen; |
| 2161 | } |
| 2162 | |
| 2163 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 2164 | unsigned int n_elem) |
| 2165 | { |
| 2166 | qc->flags |= ATA_QCFLAG_SG; |
| 2167 | qc->sg = sg; |
| 2168 | qc->n_elem = n_elem; |
| 2169 | } |
| 2170 | |
| 2171 | /** |
| 2172 | * ata_sg_setup_one - |
| 2173 | * @qc: |
| 2174 | * |
| 2175 | * LOCKING: |
| 2176 | * spin_lock_irqsave(host_set lock) |
| 2177 | * |
| 2178 | * RETURNS: |
| 2179 | * |
| 2180 | */ |
| 2181 | |
| 2182 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) |
| 2183 | { |
| 2184 | struct ata_port *ap = qc->ap; |
| 2185 | int dir = qc->dma_dir; |
| 2186 | struct scatterlist *sg = qc->sg; |
| 2187 | dma_addr_t dma_address; |
| 2188 | |
| 2189 | dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, |
| 2190 | sg_dma_len(sg), dir); |
| 2191 | if (dma_mapping_error(dma_address)) |
| 2192 | return -1; |
| 2193 | |
| 2194 | sg_dma_address(sg) = dma_address; |
| 2195 | |
| 2196 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
| 2197 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2198 | |
| 2199 | return 0; |
| 2200 | } |
| 2201 | |
| 2202 | /** |
| 2203 | * ata_sg_setup - |
| 2204 | * @qc: |
| 2205 | * |
| 2206 | * LOCKING: |
| 2207 | * spin_lock_irqsave(host_set lock) |
| 2208 | * |
| 2209 | * RETURNS: |
| 2210 | * |
| 2211 | */ |
| 2212 | |
| 2213 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 2214 | { |
| 2215 | struct ata_port *ap = qc->ap; |
| 2216 | struct scatterlist *sg = qc->sg; |
| 2217 | int n_elem, dir; |
| 2218 | |
| 2219 | VPRINTK("ENTER, ata%u\n", ap->id); |
| 2220 | assert(qc->flags & ATA_QCFLAG_SG); |
| 2221 | |
| 2222 | dir = qc->dma_dir; |
| 2223 | n_elem = dma_map_sg(ap->host_set->dev, sg, qc->n_elem, dir); |
| 2224 | if (n_elem < 1) |
| 2225 | return -1; |
| 2226 | |
| 2227 | DPRINTK("%d sg elements mapped\n", n_elem); |
| 2228 | |
| 2229 | qc->n_elem = n_elem; |
| 2230 | |
| 2231 | return 0; |
| 2232 | } |
| 2233 | |
| 2234 | /** |
| 2235 | * ata_pio_poll - |
| 2236 | * @ap: |
| 2237 | * |
| 2238 | * LOCKING: |
| 2239 | * |
| 2240 | * RETURNS: |
| 2241 | * |
| 2242 | */ |
| 2243 | |
| 2244 | static unsigned long ata_pio_poll(struct ata_port *ap) |
| 2245 | { |
| 2246 | u8 status; |
| 2247 | unsigned int poll_state = PIO_ST_UNKNOWN; |
| 2248 | unsigned int reg_state = PIO_ST_UNKNOWN; |
| 2249 | const unsigned int tmout_state = PIO_ST_TMOUT; |
| 2250 | |
| 2251 | switch (ap->pio_task_state) { |
| 2252 | case PIO_ST: |
| 2253 | case PIO_ST_POLL: |
| 2254 | poll_state = PIO_ST_POLL; |
| 2255 | reg_state = PIO_ST; |
| 2256 | break; |
| 2257 | case PIO_ST_LAST: |
| 2258 | case PIO_ST_LAST_POLL: |
| 2259 | poll_state = PIO_ST_LAST_POLL; |
| 2260 | reg_state = PIO_ST_LAST; |
| 2261 | break; |
| 2262 | default: |
| 2263 | BUG(); |
| 2264 | break; |
| 2265 | } |
| 2266 | |
| 2267 | status = ata_chk_status(ap); |
| 2268 | if (status & ATA_BUSY) { |
| 2269 | if (time_after(jiffies, ap->pio_task_timeout)) { |
| 2270 | ap->pio_task_state = tmout_state; |
| 2271 | return 0; |
| 2272 | } |
| 2273 | ap->pio_task_state = poll_state; |
| 2274 | return ATA_SHORT_PAUSE; |
| 2275 | } |
| 2276 | |
| 2277 | ap->pio_task_state = reg_state; |
| 2278 | return 0; |
| 2279 | } |
| 2280 | |
| 2281 | /** |
| 2282 | * ata_pio_complete - |
| 2283 | * @ap: |
| 2284 | * |
| 2285 | * LOCKING: |
| 2286 | */ |
| 2287 | |
| 2288 | static void ata_pio_complete (struct ata_port *ap) |
| 2289 | { |
| 2290 | struct ata_queued_cmd *qc; |
| 2291 | u8 drv_stat; |
| 2292 | |
| 2293 | /* |
| 2294 | * This is purely hueristic. This is a fast path. |
| 2295 | * Sometimes when we enter, BSY will be cleared in |
| 2296 | * a chk-status or two. If not, the drive is probably seeking |
| 2297 | * or something. Snooze for a couple msecs, then |
| 2298 | * chk-status again. If still busy, fall back to |
| 2299 | * PIO_ST_POLL state. |
| 2300 | */ |
| 2301 | drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); |
| 2302 | if (drv_stat & (ATA_BUSY | ATA_DRQ)) { |
| 2303 | msleep(2); |
| 2304 | drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); |
| 2305 | if (drv_stat & (ATA_BUSY | ATA_DRQ)) { |
| 2306 | ap->pio_task_state = PIO_ST_LAST_POLL; |
| 2307 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
| 2308 | return; |
| 2309 | } |
| 2310 | } |
| 2311 | |
| 2312 | drv_stat = ata_wait_idle(ap); |
| 2313 | if (!ata_ok(drv_stat)) { |
| 2314 | ap->pio_task_state = PIO_ST_ERR; |
| 2315 | return; |
| 2316 | } |
| 2317 | |
| 2318 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2319 | assert(qc != NULL); |
| 2320 | |
| 2321 | ap->pio_task_state = PIO_ST_IDLE; |
| 2322 | |
| 2323 | ata_irq_on(ap); |
| 2324 | |
| 2325 | ata_qc_complete(qc, drv_stat); |
| 2326 | } |
| 2327 | |
| 2328 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 2329 | { |
| 2330 | #ifdef __BIG_ENDIAN |
| 2331 | unsigned int i; |
| 2332 | |
| 2333 | for (i = 0; i < buf_words; i++) |
| 2334 | buf[i] = le16_to_cpu(buf[i]); |
| 2335 | #endif /* __BIG_ENDIAN */ |
| 2336 | } |
| 2337 | |
| 2338 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2339 | unsigned int buflen, int write_data) |
| 2340 | { |
| 2341 | unsigned int i; |
| 2342 | unsigned int words = buflen >> 1; |
| 2343 | u16 *buf16 = (u16 *) buf; |
| 2344 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; |
| 2345 | |
| 2346 | if (write_data) { |
| 2347 | for (i = 0; i < words; i++) |
| 2348 | writew(le16_to_cpu(buf16[i]), mmio); |
| 2349 | } else { |
| 2350 | for (i = 0; i < words; i++) |
| 2351 | buf16[i] = cpu_to_le16(readw(mmio)); |
| 2352 | } |
| 2353 | } |
| 2354 | |
| 2355 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2356 | unsigned int buflen, int write_data) |
| 2357 | { |
| 2358 | unsigned int dwords = buflen >> 1; |
| 2359 | |
| 2360 | if (write_data) |
| 2361 | outsw(ap->ioaddr.data_addr, buf, dwords); |
| 2362 | else |
| 2363 | insw(ap->ioaddr.data_addr, buf, dwords); |
| 2364 | } |
| 2365 | |
| 2366 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2367 | unsigned int buflen, int do_write) |
| 2368 | { |
| 2369 | if (ap->flags & ATA_FLAG_MMIO) |
| 2370 | ata_mmio_data_xfer(ap, buf, buflen, do_write); |
| 2371 | else |
| 2372 | ata_pio_data_xfer(ap, buf, buflen, do_write); |
| 2373 | } |
| 2374 | |
| 2375 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 2376 | { |
| 2377 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2378 | struct scatterlist *sg = qc->sg; |
| 2379 | struct ata_port *ap = qc->ap; |
| 2380 | struct page *page; |
| 2381 | unsigned int offset; |
| 2382 | unsigned char *buf; |
| 2383 | |
| 2384 | if (qc->cursect == (qc->nsect - 1)) |
| 2385 | ap->pio_task_state = PIO_ST_LAST; |
| 2386 | |
| 2387 | page = sg[qc->cursg].page; |
| 2388 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; |
| 2389 | |
| 2390 | /* get the current page and offset */ |
| 2391 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 2392 | offset %= PAGE_SIZE; |
| 2393 | |
| 2394 | buf = kmap(page) + offset; |
| 2395 | |
| 2396 | qc->cursect++; |
| 2397 | qc->cursg_ofs++; |
| 2398 | |
| 2399 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == sg_dma_len(&sg[qc->cursg])) { |
| 2400 | qc->cursg++; |
| 2401 | qc->cursg_ofs = 0; |
| 2402 | } |
| 2403 | |
| 2404 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2405 | |
| 2406 | /* do the actual data transfer */ |
| 2407 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2408 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); |
| 2409 | |
| 2410 | kunmap(page); |
| 2411 | } |
| 2412 | |
| 2413 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 2414 | { |
| 2415 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2416 | struct scatterlist *sg = qc->sg; |
| 2417 | struct ata_port *ap = qc->ap; |
| 2418 | struct page *page; |
| 2419 | unsigned char *buf; |
| 2420 | unsigned int offset, count; |
| 2421 | |
| 2422 | if (qc->curbytes == qc->nbytes - bytes) |
| 2423 | ap->pio_task_state = PIO_ST_LAST; |
| 2424 | |
| 2425 | next_sg: |
| 2426 | sg = &qc->sg[qc->cursg]; |
| 2427 | |
| 2428 | next_page: |
| 2429 | page = sg->page; |
| 2430 | offset = sg->offset + qc->cursg_ofs; |
| 2431 | |
| 2432 | /* get the current page and offset */ |
| 2433 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 2434 | offset %= PAGE_SIZE; |
| 2435 | |
| 2436 | count = min(sg_dma_len(sg) - qc->cursg_ofs, bytes); |
| 2437 | |
| 2438 | /* don't cross page boundaries */ |
| 2439 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 2440 | |
| 2441 | buf = kmap(page) + offset; |
| 2442 | |
| 2443 | bytes -= count; |
| 2444 | qc->curbytes += count; |
| 2445 | qc->cursg_ofs += count; |
| 2446 | |
| 2447 | if (qc->cursg_ofs == sg_dma_len(sg)) { |
| 2448 | qc->cursg++; |
| 2449 | qc->cursg_ofs = 0; |
| 2450 | } |
| 2451 | |
| 2452 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2453 | |
| 2454 | /* do the actual data transfer */ |
| 2455 | ata_data_xfer(ap, buf, count, do_write); |
| 2456 | |
| 2457 | kunmap(page); |
| 2458 | |
| 2459 | if (bytes) { |
| 2460 | if (qc->cursg_ofs < sg_dma_len(sg)) |
| 2461 | goto next_page; |
| 2462 | goto next_sg; |
| 2463 | } |
| 2464 | } |
| 2465 | |
| 2466 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 2467 | { |
| 2468 | struct ata_port *ap = qc->ap; |
| 2469 | struct ata_device *dev = qc->dev; |
| 2470 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 2471 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 2472 | |
| 2473 | ap->ops->tf_read(ap, &qc->tf); |
| 2474 | ireason = qc->tf.nsect; |
| 2475 | bc_lo = qc->tf.lbam; |
| 2476 | bc_hi = qc->tf.lbah; |
| 2477 | bytes = (bc_hi << 8) | bc_lo; |
| 2478 | |
| 2479 | /* shall be cleared to zero, indicating xfer of data */ |
| 2480 | if (ireason & (1 << 0)) |
| 2481 | goto err_out; |
| 2482 | |
| 2483 | /* make sure transfer direction matches expected */ |
| 2484 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 2485 | if (do_write != i_write) |
| 2486 | goto err_out; |
| 2487 | |
| 2488 | __atapi_pio_bytes(qc, bytes); |
| 2489 | |
| 2490 | return; |
| 2491 | |
| 2492 | err_out: |
| 2493 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", |
| 2494 | ap->id, dev->devno); |
| 2495 | ap->pio_task_state = PIO_ST_ERR; |
| 2496 | } |
| 2497 | |
| 2498 | /** |
| 2499 | * ata_pio_sector - |
| 2500 | * @ap: |
| 2501 | * |
| 2502 | * LOCKING: |
| 2503 | */ |
| 2504 | |
| 2505 | static void ata_pio_block(struct ata_port *ap) |
| 2506 | { |
| 2507 | struct ata_queued_cmd *qc; |
| 2508 | u8 status; |
| 2509 | |
| 2510 | /* |
| 2511 | * This is purely hueristic. This is a fast path. |
| 2512 | * Sometimes when we enter, BSY will be cleared in |
| 2513 | * a chk-status or two. If not, the drive is probably seeking |
| 2514 | * or something. Snooze for a couple msecs, then |
| 2515 | * chk-status again. If still busy, fall back to |
| 2516 | * PIO_ST_POLL state. |
| 2517 | */ |
| 2518 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 2519 | if (status & ATA_BUSY) { |
| 2520 | msleep(2); |
| 2521 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 2522 | if (status & ATA_BUSY) { |
| 2523 | ap->pio_task_state = PIO_ST_POLL; |
| 2524 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
| 2525 | return; |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2530 | assert(qc != NULL); |
| 2531 | |
| 2532 | if (is_atapi_taskfile(&qc->tf)) { |
| 2533 | /* no more data to transfer or unsupported ATAPI command */ |
| 2534 | if ((status & ATA_DRQ) == 0) { |
| 2535 | ap->pio_task_state = PIO_ST_IDLE; |
| 2536 | |
| 2537 | ata_irq_on(ap); |
| 2538 | |
| 2539 | ata_qc_complete(qc, status); |
| 2540 | return; |
| 2541 | } |
| 2542 | |
| 2543 | atapi_pio_bytes(qc); |
| 2544 | } else { |
| 2545 | /* handle BSY=0, DRQ=0 as error */ |
| 2546 | if ((status & ATA_DRQ) == 0) { |
| 2547 | ap->pio_task_state = PIO_ST_ERR; |
| 2548 | return; |
| 2549 | } |
| 2550 | |
| 2551 | ata_pio_sector(qc); |
| 2552 | } |
| 2553 | } |
| 2554 | |
| 2555 | static void ata_pio_error(struct ata_port *ap) |
| 2556 | { |
| 2557 | struct ata_queued_cmd *qc; |
| 2558 | u8 drv_stat; |
| 2559 | |
| 2560 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2561 | assert(qc != NULL); |
| 2562 | |
| 2563 | drv_stat = ata_chk_status(ap); |
| 2564 | printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n", |
| 2565 | ap->id, drv_stat); |
| 2566 | |
| 2567 | ap->pio_task_state = PIO_ST_IDLE; |
| 2568 | |
| 2569 | ata_irq_on(ap); |
| 2570 | |
| 2571 | ata_qc_complete(qc, drv_stat | ATA_ERR); |
| 2572 | } |
| 2573 | |
| 2574 | static void ata_pio_task(void *_data) |
| 2575 | { |
| 2576 | struct ata_port *ap = _data; |
| 2577 | unsigned long timeout = 0; |
| 2578 | |
| 2579 | switch (ap->pio_task_state) { |
| 2580 | case PIO_ST_IDLE: |
| 2581 | return; |
| 2582 | |
| 2583 | case PIO_ST: |
| 2584 | ata_pio_block(ap); |
| 2585 | break; |
| 2586 | |
| 2587 | case PIO_ST_LAST: |
| 2588 | ata_pio_complete(ap); |
| 2589 | break; |
| 2590 | |
| 2591 | case PIO_ST_POLL: |
| 2592 | case PIO_ST_LAST_POLL: |
| 2593 | timeout = ata_pio_poll(ap); |
| 2594 | break; |
| 2595 | |
| 2596 | case PIO_ST_TMOUT: |
| 2597 | case PIO_ST_ERR: |
| 2598 | ata_pio_error(ap); |
| 2599 | return; |
| 2600 | } |
| 2601 | |
| 2602 | if (timeout) |
| 2603 | queue_delayed_work(ata_wq, &ap->pio_task, |
| 2604 | timeout); |
| 2605 | else |
| 2606 | queue_work(ata_wq, &ap->pio_task); |
| 2607 | } |
| 2608 | |
| 2609 | static void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, |
| 2610 | struct scsi_cmnd *cmd) |
| 2611 | { |
| 2612 | DECLARE_COMPLETION(wait); |
| 2613 | struct ata_queued_cmd *qc; |
| 2614 | unsigned long flags; |
| 2615 | int rc; |
| 2616 | |
| 2617 | DPRINTK("ATAPI request sense\n"); |
| 2618 | |
| 2619 | qc = ata_qc_new_init(ap, dev); |
| 2620 | BUG_ON(qc == NULL); |
| 2621 | |
| 2622 | /* FIXME: is this needed? */ |
| 2623 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); |
| 2624 | |
| 2625 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
| 2626 | qc->dma_dir = DMA_FROM_DEVICE; |
| 2627 | |
| 2628 | memset(&qc->cdb, 0, sizeof(ap->cdb_len)); |
| 2629 | qc->cdb[0] = REQUEST_SENSE; |
| 2630 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
| 2631 | |
| 2632 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2633 | qc->tf.command = ATA_CMD_PACKET; |
| 2634 | |
| 2635 | qc->tf.protocol = ATA_PROT_ATAPI; |
| 2636 | qc->tf.lbam = (8 * 1024) & 0xff; |
| 2637 | qc->tf.lbah = (8 * 1024) >> 8; |
| 2638 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
| 2639 | |
| 2640 | qc->waiting = &wait; |
| 2641 | qc->complete_fn = ata_qc_complete_noop; |
| 2642 | |
| 2643 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2644 | rc = ata_qc_issue(qc); |
| 2645 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2646 | |
| 2647 | if (rc) |
| 2648 | ata_port_disable(ap); |
| 2649 | else |
| 2650 | wait_for_completion(&wait); |
| 2651 | |
| 2652 | DPRINTK("EXIT\n"); |
| 2653 | } |
| 2654 | |
| 2655 | /** |
| 2656 | * ata_qc_timeout - Handle timeout of queued command |
| 2657 | * @qc: Command that timed out |
| 2658 | * |
| 2659 | * Some part of the kernel (currently, only the SCSI layer) |
| 2660 | * has noticed that the active command on port @ap has not |
| 2661 | * completed after a specified length of time. Handle this |
| 2662 | * condition by disabling DMA (if necessary) and completing |
| 2663 | * transactions, with error if necessary. |
| 2664 | * |
| 2665 | * This also handles the case of the "lost interrupt", where |
| 2666 | * for some reason (possibly hardware bug, possibly driver bug) |
| 2667 | * an interrupt was not delivered to the driver, even though the |
| 2668 | * transaction completed successfully. |
| 2669 | * |
| 2670 | * LOCKING: |
| 2671 | */ |
| 2672 | |
| 2673 | static void ata_qc_timeout(struct ata_queued_cmd *qc) |
| 2674 | { |
| 2675 | struct ata_port *ap = qc->ap; |
| 2676 | struct ata_device *dev = qc->dev; |
| 2677 | u8 host_stat = 0, drv_stat; |
| 2678 | |
| 2679 | DPRINTK("ENTER\n"); |
| 2680 | |
| 2681 | /* FIXME: doesn't this conflict with timeout handling? */ |
| 2682 | if (qc->dev->class == ATA_DEV_ATAPI && qc->scsicmd) { |
| 2683 | struct scsi_cmnd *cmd = qc->scsicmd; |
| 2684 | |
| 2685 | if (!scsi_eh_eflags_chk(cmd, SCSI_EH_CANCEL_CMD)) { |
| 2686 | |
| 2687 | /* finish completing original command */ |
| 2688 | __ata_qc_complete(qc); |
| 2689 | |
| 2690 | atapi_request_sense(ap, dev, cmd); |
| 2691 | |
| 2692 | cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); |
| 2693 | scsi_finish_command(cmd); |
| 2694 | |
| 2695 | goto out; |
| 2696 | } |
| 2697 | } |
| 2698 | |
| 2699 | /* hack alert! We cannot use the supplied completion |
| 2700 | * function from inside the ->eh_strategy_handler() thread. |
| 2701 | * libata is the only user of ->eh_strategy_handler() in |
| 2702 | * any kernel, so the default scsi_done() assumes it is |
| 2703 | * not being called from the SCSI EH. |
| 2704 | */ |
| 2705 | qc->scsidone = scsi_finish_command; |
| 2706 | |
| 2707 | switch (qc->tf.protocol) { |
| 2708 | |
| 2709 | case ATA_PROT_DMA: |
| 2710 | case ATA_PROT_ATAPI_DMA: |
| 2711 | host_stat = ap->ops->bmdma_status(ap); |
| 2712 | |
| 2713 | /* before we do anything else, clear DMA-Start bit */ |
| 2714 | ap->ops->bmdma_stop(ap); |
| 2715 | |
| 2716 | /* fall through */ |
| 2717 | |
| 2718 | default: |
| 2719 | ata_altstatus(ap); |
| 2720 | drv_stat = ata_chk_status(ap); |
| 2721 | |
| 2722 | /* ack bmdma irq events */ |
| 2723 | ap->ops->irq_clear(ap); |
| 2724 | |
| 2725 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", |
| 2726 | ap->id, qc->tf.command, drv_stat, host_stat); |
| 2727 | |
| 2728 | /* complete taskfile transaction */ |
| 2729 | ata_qc_complete(qc, drv_stat); |
| 2730 | break; |
| 2731 | } |
| 2732 | out: |
| 2733 | DPRINTK("EXIT\n"); |
| 2734 | } |
| 2735 | |
| 2736 | /** |
| 2737 | * ata_eng_timeout - Handle timeout of queued command |
| 2738 | * @ap: Port on which timed-out command is active |
| 2739 | * |
| 2740 | * Some part of the kernel (currently, only the SCSI layer) |
| 2741 | * has noticed that the active command on port @ap has not |
| 2742 | * completed after a specified length of time. Handle this |
| 2743 | * condition by disabling DMA (if necessary) and completing |
| 2744 | * transactions, with error if necessary. |
| 2745 | * |
| 2746 | * This also handles the case of the "lost interrupt", where |
| 2747 | * for some reason (possibly hardware bug, possibly driver bug) |
| 2748 | * an interrupt was not delivered to the driver, even though the |
| 2749 | * transaction completed successfully. |
| 2750 | * |
| 2751 | * LOCKING: |
| 2752 | * Inherited from SCSI layer (none, can sleep) |
| 2753 | */ |
| 2754 | |
| 2755 | void ata_eng_timeout(struct ata_port *ap) |
| 2756 | { |
| 2757 | struct ata_queued_cmd *qc; |
| 2758 | |
| 2759 | DPRINTK("ENTER\n"); |
| 2760 | |
| 2761 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2762 | if (!qc) { |
| 2763 | printk(KERN_ERR "ata%u: BUG: timeout without command\n", |
| 2764 | ap->id); |
| 2765 | goto out; |
| 2766 | } |
| 2767 | |
| 2768 | ata_qc_timeout(qc); |
| 2769 | |
| 2770 | out: |
| 2771 | DPRINTK("EXIT\n"); |
| 2772 | } |
| 2773 | |
| 2774 | /** |
| 2775 | * ata_qc_new - Request an available ATA command, for queueing |
| 2776 | * @ap: Port associated with device @dev |
| 2777 | * @dev: Device from whom we request an available command structure |
| 2778 | * |
| 2779 | * LOCKING: |
| 2780 | */ |
| 2781 | |
| 2782 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 2783 | { |
| 2784 | struct ata_queued_cmd *qc = NULL; |
| 2785 | unsigned int i; |
| 2786 | |
| 2787 | for (i = 0; i < ATA_MAX_QUEUE; i++) |
| 2788 | if (!test_and_set_bit(i, &ap->qactive)) { |
| 2789 | qc = ata_qc_from_tag(ap, i); |
| 2790 | break; |
| 2791 | } |
| 2792 | |
| 2793 | if (qc) |
| 2794 | qc->tag = i; |
| 2795 | |
| 2796 | return qc; |
| 2797 | } |
| 2798 | |
| 2799 | /** |
| 2800 | * ata_qc_new_init - Request an available ATA command, and initialize it |
| 2801 | * @ap: Port associated with device @dev |
| 2802 | * @dev: Device from whom we request an available command structure |
| 2803 | * |
| 2804 | * LOCKING: |
| 2805 | */ |
| 2806 | |
| 2807 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, |
| 2808 | struct ata_device *dev) |
| 2809 | { |
| 2810 | struct ata_queued_cmd *qc; |
| 2811 | |
| 2812 | qc = ata_qc_new(ap); |
| 2813 | if (qc) { |
| 2814 | qc->sg = NULL; |
| 2815 | qc->flags = 0; |
| 2816 | qc->scsicmd = NULL; |
| 2817 | qc->ap = ap; |
| 2818 | qc->dev = dev; |
| 2819 | qc->cursect = qc->cursg = qc->cursg_ofs = 0; |
| 2820 | qc->nsect = 0; |
| 2821 | qc->nbytes = qc->curbytes = 0; |
| 2822 | |
| 2823 | ata_tf_init(ap, &qc->tf, dev->devno); |
| 2824 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame^] | 2825 | if (dev->flags & ATA_DFLAG_LBA) { |
| 2826 | qc->tf.flags |= ATA_TFLAG_LBA; |
| 2827 | |
| 2828 | if (dev->flags & ATA_DFLAG_LBA48) |
| 2829 | qc->tf.flags |= ATA_TFLAG_LBA48; |
| 2830 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | } |
| 2832 | |
| 2833 | return qc; |
| 2834 | } |
| 2835 | |
| 2836 | static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat) |
| 2837 | { |
| 2838 | return 0; |
| 2839 | } |
| 2840 | |
| 2841 | static void __ata_qc_complete(struct ata_queued_cmd *qc) |
| 2842 | { |
| 2843 | struct ata_port *ap = qc->ap; |
| 2844 | unsigned int tag, do_clear = 0; |
| 2845 | |
| 2846 | qc->flags = 0; |
| 2847 | tag = qc->tag; |
| 2848 | if (likely(ata_tag_valid(tag))) { |
| 2849 | if (tag == ap->active_tag) |
| 2850 | ap->active_tag = ATA_TAG_POISON; |
| 2851 | qc->tag = ATA_TAG_POISON; |
| 2852 | do_clear = 1; |
| 2853 | } |
| 2854 | |
| 2855 | if (qc->waiting) { |
| 2856 | struct completion *waiting = qc->waiting; |
| 2857 | qc->waiting = NULL; |
| 2858 | complete(waiting); |
| 2859 | } |
| 2860 | |
| 2861 | if (likely(do_clear)) |
| 2862 | clear_bit(tag, &ap->qactive); |
| 2863 | } |
| 2864 | |
| 2865 | /** |
| 2866 | * ata_qc_free - free unused ata_queued_cmd |
| 2867 | * @qc: Command to complete |
| 2868 | * |
| 2869 | * Designed to free unused ata_queued_cmd object |
| 2870 | * in case something prevents using it. |
| 2871 | * |
| 2872 | * LOCKING: |
| 2873 | * |
| 2874 | */ |
| 2875 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 2876 | { |
| 2877 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 2878 | assert(qc->waiting == NULL); /* nothing should be waiting */ |
| 2879 | |
| 2880 | __ata_qc_complete(qc); |
| 2881 | } |
| 2882 | |
| 2883 | /** |
| 2884 | * ata_qc_complete - Complete an active ATA command |
| 2885 | * @qc: Command to complete |
| 2886 | * @drv_stat: ATA status register contents |
| 2887 | * |
| 2888 | * LOCKING: |
| 2889 | * |
| 2890 | */ |
| 2891 | |
| 2892 | void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) |
| 2893 | { |
| 2894 | int rc; |
| 2895 | |
| 2896 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 2897 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 2898 | |
| 2899 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2900 | ata_sg_clean(qc); |
| 2901 | |
| 2902 | /* call completion callback */ |
| 2903 | rc = qc->complete_fn(qc, drv_stat); |
| 2904 | |
| 2905 | /* if callback indicates not to complete command (non-zero), |
| 2906 | * return immediately |
| 2907 | */ |
| 2908 | if (rc != 0) |
| 2909 | return; |
| 2910 | |
| 2911 | __ata_qc_complete(qc); |
| 2912 | |
| 2913 | VPRINTK("EXIT\n"); |
| 2914 | } |
| 2915 | |
| 2916 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
| 2917 | { |
| 2918 | struct ata_port *ap = qc->ap; |
| 2919 | |
| 2920 | switch (qc->tf.protocol) { |
| 2921 | case ATA_PROT_DMA: |
| 2922 | case ATA_PROT_ATAPI_DMA: |
| 2923 | return 1; |
| 2924 | |
| 2925 | case ATA_PROT_ATAPI: |
| 2926 | case ATA_PROT_PIO: |
| 2927 | case ATA_PROT_PIO_MULT: |
| 2928 | if (ap->flags & ATA_FLAG_PIO_DMA) |
| 2929 | return 1; |
| 2930 | |
| 2931 | /* fall through */ |
| 2932 | |
| 2933 | default: |
| 2934 | return 0; |
| 2935 | } |
| 2936 | |
| 2937 | /* never reached */ |
| 2938 | } |
| 2939 | |
| 2940 | /** |
| 2941 | * ata_qc_issue - issue taskfile to device |
| 2942 | * @qc: command to issue to device |
| 2943 | * |
| 2944 | * Prepare an ATA command to submission to device. |
| 2945 | * This includes mapping the data into a DMA-able |
| 2946 | * area, filling in the S/G table, and finally |
| 2947 | * writing the taskfile to hardware, starting the command. |
| 2948 | * |
| 2949 | * LOCKING: |
| 2950 | * spin_lock_irqsave(host_set lock) |
| 2951 | * |
| 2952 | * RETURNS: |
| 2953 | * Zero on success, negative on error. |
| 2954 | */ |
| 2955 | |
| 2956 | int ata_qc_issue(struct ata_queued_cmd *qc) |
| 2957 | { |
| 2958 | struct ata_port *ap = qc->ap; |
| 2959 | |
| 2960 | if (ata_should_dma_map(qc)) { |
| 2961 | if (qc->flags & ATA_QCFLAG_SG) { |
| 2962 | if (ata_sg_setup(qc)) |
| 2963 | goto err_out; |
| 2964 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
| 2965 | if (ata_sg_setup_one(qc)) |
| 2966 | goto err_out; |
| 2967 | } |
| 2968 | } else { |
| 2969 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 2970 | } |
| 2971 | |
| 2972 | ap->ops->qc_prep(qc); |
| 2973 | |
| 2974 | qc->ap->active_tag = qc->tag; |
| 2975 | qc->flags |= ATA_QCFLAG_ACTIVE; |
| 2976 | |
| 2977 | return ap->ops->qc_issue(qc); |
| 2978 | |
| 2979 | err_out: |
| 2980 | return -1; |
| 2981 | } |
| 2982 | |
| 2983 | /** |
| 2984 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 2985 | * @qc: command to issue to device |
| 2986 | * |
| 2987 | * Using various libata functions and hooks, this function |
| 2988 | * starts an ATA command. ATA commands are grouped into |
| 2989 | * classes called "protocols", and issuing each type of protocol |
| 2990 | * is slightly different. |
| 2991 | * |
| 2992 | * LOCKING: |
| 2993 | * spin_lock_irqsave(host_set lock) |
| 2994 | * |
| 2995 | * RETURNS: |
| 2996 | * Zero on success, negative on error. |
| 2997 | */ |
| 2998 | |
| 2999 | int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
| 3000 | { |
| 3001 | struct ata_port *ap = qc->ap; |
| 3002 | |
| 3003 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 3004 | |
| 3005 | switch (qc->tf.protocol) { |
| 3006 | case ATA_PROT_NODATA: |
| 3007 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3008 | break; |
| 3009 | |
| 3010 | case ATA_PROT_DMA: |
| 3011 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 3012 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 3013 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 3014 | break; |
| 3015 | |
| 3016 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ |
| 3017 | ata_qc_set_polling(qc); |
| 3018 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3019 | ap->pio_task_state = PIO_ST; |
| 3020 | queue_work(ata_wq, &ap->pio_task); |
| 3021 | break; |
| 3022 | |
| 3023 | case ATA_PROT_ATAPI: |
| 3024 | ata_qc_set_polling(qc); |
| 3025 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3026 | queue_work(ata_wq, &ap->packet_task); |
| 3027 | break; |
| 3028 | |
| 3029 | case ATA_PROT_ATAPI_NODATA: |
| 3030 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3031 | queue_work(ata_wq, &ap->packet_task); |
| 3032 | break; |
| 3033 | |
| 3034 | case ATA_PROT_ATAPI_DMA: |
| 3035 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 3036 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 3037 | queue_work(ata_wq, &ap->packet_task); |
| 3038 | break; |
| 3039 | |
| 3040 | default: |
| 3041 | WARN_ON(1); |
| 3042 | return -1; |
| 3043 | } |
| 3044 | |
| 3045 | return 0; |
| 3046 | } |
| 3047 | |
| 3048 | /** |
| 3049 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction |
| 3050 | * @qc: Info associated with this ATA transaction. |
| 3051 | * |
| 3052 | * LOCKING: |
| 3053 | * spin_lock_irqsave(host_set lock) |
| 3054 | */ |
| 3055 | |
| 3056 | static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc) |
| 3057 | { |
| 3058 | struct ata_port *ap = qc->ap; |
| 3059 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 3060 | u8 dmactl; |
| 3061 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3062 | |
| 3063 | /* load PRD table addr. */ |
| 3064 | mb(); /* make sure PRD table writes are visible to controller */ |
| 3065 | writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS); |
| 3066 | |
| 3067 | /* specify data direction, triple-check start bit is clear */ |
| 3068 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 3069 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 3070 | if (!rw) |
| 3071 | dmactl |= ATA_DMA_WR; |
| 3072 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 3073 | |
| 3074 | /* issue r/w command */ |
| 3075 | ap->ops->exec_command(ap, &qc->tf); |
| 3076 | } |
| 3077 | |
| 3078 | /** |
| 3079 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction |
| 3080 | * @qc: Info associated with this ATA transaction. |
| 3081 | * |
| 3082 | * LOCKING: |
| 3083 | * spin_lock_irqsave(host_set lock) |
| 3084 | */ |
| 3085 | |
| 3086 | static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc) |
| 3087 | { |
| 3088 | struct ata_port *ap = qc->ap; |
| 3089 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3090 | u8 dmactl; |
| 3091 | |
| 3092 | /* start host DMA transaction */ |
| 3093 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 3094 | writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD); |
| 3095 | |
| 3096 | /* Strictly, one may wish to issue a readb() here, to |
| 3097 | * flush the mmio write. However, control also passes |
| 3098 | * to the hardware at this point, and it will interrupt |
| 3099 | * us when we are to resume control. So, in effect, |
| 3100 | * we don't care when the mmio write flushes. |
| 3101 | * Further, a read of the DMA status register _immediately_ |
| 3102 | * following the write may not be what certain flaky hardware |
| 3103 | * is expected, so I think it is best to not add a readb() |
| 3104 | * without first all the MMIO ATA cards/mobos. |
| 3105 | * Or maybe I'm just being paranoid. |
| 3106 | */ |
| 3107 | } |
| 3108 | |
| 3109 | /** |
| 3110 | * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO) |
| 3111 | * @qc: Info associated with this ATA transaction. |
| 3112 | * |
| 3113 | * LOCKING: |
| 3114 | * spin_lock_irqsave(host_set lock) |
| 3115 | */ |
| 3116 | |
| 3117 | static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc) |
| 3118 | { |
| 3119 | struct ata_port *ap = qc->ap; |
| 3120 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 3121 | u8 dmactl; |
| 3122 | |
| 3123 | /* load PRD table addr. */ |
| 3124 | outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); |
| 3125 | |
| 3126 | /* specify data direction, triple-check start bit is clear */ |
| 3127 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3128 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 3129 | if (!rw) |
| 3130 | dmactl |= ATA_DMA_WR; |
| 3131 | outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3132 | |
| 3133 | /* issue r/w command */ |
| 3134 | ap->ops->exec_command(ap, &qc->tf); |
| 3135 | } |
| 3136 | |
| 3137 | /** |
| 3138 | * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO) |
| 3139 | * @qc: Info associated with this ATA transaction. |
| 3140 | * |
| 3141 | * LOCKING: |
| 3142 | * spin_lock_irqsave(host_set lock) |
| 3143 | */ |
| 3144 | |
| 3145 | static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) |
| 3146 | { |
| 3147 | struct ata_port *ap = qc->ap; |
| 3148 | u8 dmactl; |
| 3149 | |
| 3150 | /* start host DMA transaction */ |
| 3151 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3152 | outb(dmactl | ATA_DMA_START, |
| 3153 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3154 | } |
| 3155 | |
| 3156 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
| 3157 | { |
| 3158 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 3159 | ata_bmdma_start_mmio(qc); |
| 3160 | else |
| 3161 | ata_bmdma_start_pio(qc); |
| 3162 | } |
| 3163 | |
| 3164 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
| 3165 | { |
| 3166 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 3167 | ata_bmdma_setup_mmio(qc); |
| 3168 | else |
| 3169 | ata_bmdma_setup_pio(qc); |
| 3170 | } |
| 3171 | |
| 3172 | void ata_bmdma_irq_clear(struct ata_port *ap) |
| 3173 | { |
| 3174 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3175 | void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS; |
| 3176 | writeb(readb(mmio), mmio); |
| 3177 | } else { |
| 3178 | unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS; |
| 3179 | outb(inb(addr), addr); |
| 3180 | } |
| 3181 | |
| 3182 | } |
| 3183 | |
| 3184 | u8 ata_bmdma_status(struct ata_port *ap) |
| 3185 | { |
| 3186 | u8 host_stat; |
| 3187 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3188 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3189 | host_stat = readb(mmio + ATA_DMA_STATUS); |
| 3190 | } else |
| 3191 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 3192 | return host_stat; |
| 3193 | } |
| 3194 | |
| 3195 | void ata_bmdma_stop(struct ata_port *ap) |
| 3196 | { |
| 3197 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3198 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3199 | |
| 3200 | /* clear start/stop bit */ |
| 3201 | writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3202 | mmio + ATA_DMA_CMD); |
| 3203 | } else { |
| 3204 | /* clear start/stop bit */ |
| 3205 | outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3206 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3207 | } |
| 3208 | |
| 3209 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ |
| 3210 | ata_altstatus(ap); /* dummy read */ |
| 3211 | } |
| 3212 | |
| 3213 | /** |
| 3214 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 3215 | * @ap: Port on which interrupt arrived (possibly...) |
| 3216 | * @qc: Taskfile currently active in engine |
| 3217 | * |
| 3218 | * Handle host interrupt for given queued command. Currently, |
| 3219 | * only DMA interrupts are handled. All other commands are |
| 3220 | * handled via polling with interrupts disabled (nIEN bit). |
| 3221 | * |
| 3222 | * LOCKING: |
| 3223 | * spin_lock_irqsave(host_set lock) |
| 3224 | * |
| 3225 | * RETURNS: |
| 3226 | * One if interrupt was handled, zero if not (shared irq). |
| 3227 | */ |
| 3228 | |
| 3229 | inline unsigned int ata_host_intr (struct ata_port *ap, |
| 3230 | struct ata_queued_cmd *qc) |
| 3231 | { |
| 3232 | u8 status, host_stat; |
| 3233 | |
| 3234 | switch (qc->tf.protocol) { |
| 3235 | |
| 3236 | case ATA_PROT_DMA: |
| 3237 | case ATA_PROT_ATAPI_DMA: |
| 3238 | case ATA_PROT_ATAPI: |
| 3239 | /* check status of DMA engine */ |
| 3240 | host_stat = ap->ops->bmdma_status(ap); |
| 3241 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); |
| 3242 | |
| 3243 | /* if it's not our irq... */ |
| 3244 | if (!(host_stat & ATA_DMA_INTR)) |
| 3245 | goto idle_irq; |
| 3246 | |
| 3247 | /* before we do anything else, clear DMA-Start bit */ |
| 3248 | ap->ops->bmdma_stop(ap); |
| 3249 | |
| 3250 | /* fall through */ |
| 3251 | |
| 3252 | case ATA_PROT_ATAPI_NODATA: |
| 3253 | case ATA_PROT_NODATA: |
| 3254 | /* check altstatus */ |
| 3255 | status = ata_altstatus(ap); |
| 3256 | if (status & ATA_BUSY) |
| 3257 | goto idle_irq; |
| 3258 | |
| 3259 | /* check main status, clearing INTRQ */ |
| 3260 | status = ata_chk_status(ap); |
| 3261 | if (unlikely(status & ATA_BUSY)) |
| 3262 | goto idle_irq; |
| 3263 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", |
| 3264 | ap->id, qc->tf.protocol, status); |
| 3265 | |
| 3266 | /* ack bmdma irq events */ |
| 3267 | ap->ops->irq_clear(ap); |
| 3268 | |
| 3269 | /* complete taskfile transaction */ |
| 3270 | ata_qc_complete(qc, status); |
| 3271 | break; |
| 3272 | |
| 3273 | default: |
| 3274 | goto idle_irq; |
| 3275 | } |
| 3276 | |
| 3277 | return 1; /* irq handled */ |
| 3278 | |
| 3279 | idle_irq: |
| 3280 | ap->stats.idle_irq++; |
| 3281 | |
| 3282 | #ifdef ATA_IRQ_TRAP |
| 3283 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 3284 | handled = 1; |
| 3285 | ata_irq_ack(ap, 0); /* debug trap */ |
| 3286 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); |
| 3287 | } |
| 3288 | #endif |
| 3289 | return 0; /* irq not handled */ |
| 3290 | } |
| 3291 | |
| 3292 | /** |
| 3293 | * ata_interrupt - Default ATA host interrupt handler |
| 3294 | * @irq: irq line |
| 3295 | * @dev_instance: pointer to our host information structure |
| 3296 | * @regs: unused |
| 3297 | * |
| 3298 | * LOCKING: |
| 3299 | * |
| 3300 | * RETURNS: |
| 3301 | * |
| 3302 | */ |
| 3303 | |
| 3304 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) |
| 3305 | { |
| 3306 | struct ata_host_set *host_set = dev_instance; |
| 3307 | unsigned int i; |
| 3308 | unsigned int handled = 0; |
| 3309 | unsigned long flags; |
| 3310 | |
| 3311 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 3312 | spin_lock_irqsave(&host_set->lock, flags); |
| 3313 | |
| 3314 | for (i = 0; i < host_set->n_ports; i++) { |
| 3315 | struct ata_port *ap; |
| 3316 | |
| 3317 | ap = host_set->ports[i]; |
| 3318 | if (ap && (!(ap->flags & ATA_FLAG_PORT_DISABLED))) { |
| 3319 | struct ata_queued_cmd *qc; |
| 3320 | |
| 3321 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3322 | if (qc && (!(qc->tf.ctl & ATA_NIEN))) |
| 3323 | handled |= ata_host_intr(ap, qc); |
| 3324 | } |
| 3325 | } |
| 3326 | |
| 3327 | spin_unlock_irqrestore(&host_set->lock, flags); |
| 3328 | |
| 3329 | return IRQ_RETVAL(handled); |
| 3330 | } |
| 3331 | |
| 3332 | /** |
| 3333 | * atapi_packet_task - Write CDB bytes to hardware |
| 3334 | * @_data: Port to which ATAPI device is attached. |
| 3335 | * |
| 3336 | * When device has indicated its readiness to accept |
| 3337 | * a CDB, this function is called. Send the CDB. |
| 3338 | * If DMA is to be performed, exit immediately. |
| 3339 | * Otherwise, we are in polling mode, so poll |
| 3340 | * status under operation succeeds or fails. |
| 3341 | * |
| 3342 | * LOCKING: |
| 3343 | * Kernel thread context (may sleep) |
| 3344 | */ |
| 3345 | |
| 3346 | static void atapi_packet_task(void *_data) |
| 3347 | { |
| 3348 | struct ata_port *ap = _data; |
| 3349 | struct ata_queued_cmd *qc; |
| 3350 | u8 status; |
| 3351 | |
| 3352 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3353 | assert(qc != NULL); |
| 3354 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 3355 | |
| 3356 | /* sleep-wait for BSY to clear */ |
| 3357 | DPRINTK("busy wait\n"); |
| 3358 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) |
| 3359 | goto err_out; |
| 3360 | |
| 3361 | /* make sure DRQ is set */ |
| 3362 | status = ata_chk_status(ap); |
| 3363 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) |
| 3364 | goto err_out; |
| 3365 | |
| 3366 | /* send SCSI cdb */ |
| 3367 | DPRINTK("send cdb\n"); |
| 3368 | assert(ap->cdb_len >= 12); |
| 3369 | ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1); |
| 3370 | |
| 3371 | /* if we are DMA'ing, irq handler takes over from here */ |
| 3372 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) |
| 3373 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 3374 | |
| 3375 | /* non-data commands are also handled via irq */ |
| 3376 | else if (qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { |
| 3377 | /* do nothing */ |
| 3378 | } |
| 3379 | |
| 3380 | /* PIO commands are handled by polling */ |
| 3381 | else { |
| 3382 | ap->pio_task_state = PIO_ST; |
| 3383 | queue_work(ata_wq, &ap->pio_task); |
| 3384 | } |
| 3385 | |
| 3386 | return; |
| 3387 | |
| 3388 | err_out: |
| 3389 | ata_qc_complete(qc, ATA_ERR); |
| 3390 | } |
| 3391 | |
| 3392 | int ata_port_start (struct ata_port *ap) |
| 3393 | { |
| 3394 | struct device *dev = ap->host_set->dev; |
| 3395 | |
| 3396 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); |
| 3397 | if (!ap->prd) |
| 3398 | return -ENOMEM; |
| 3399 | |
| 3400 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
| 3401 | |
| 3402 | return 0; |
| 3403 | } |
| 3404 | |
| 3405 | void ata_port_stop (struct ata_port *ap) |
| 3406 | { |
| 3407 | struct device *dev = ap->host_set->dev; |
| 3408 | |
| 3409 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
| 3410 | } |
| 3411 | |
| 3412 | /** |
| 3413 | * ata_host_remove - Unregister SCSI host structure with upper layers |
| 3414 | * @ap: Port to unregister |
| 3415 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port |
| 3416 | * |
| 3417 | * LOCKING: |
| 3418 | */ |
| 3419 | |
| 3420 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) |
| 3421 | { |
| 3422 | struct Scsi_Host *sh = ap->host; |
| 3423 | |
| 3424 | DPRINTK("ENTER\n"); |
| 3425 | |
| 3426 | if (do_unregister) |
| 3427 | scsi_remove_host(sh); |
| 3428 | |
| 3429 | ap->ops->port_stop(ap); |
| 3430 | } |
| 3431 | |
| 3432 | /** |
| 3433 | * ata_host_init - Initialize an ata_port structure |
| 3434 | * @ap: Structure to initialize |
| 3435 | * @host: associated SCSI mid-layer structure |
| 3436 | * @host_set: Collection of hosts to which @ap belongs |
| 3437 | * @ent: Probe information provided by low-level driver |
| 3438 | * @port_no: Port number associated with this ata_port |
| 3439 | * |
| 3440 | * LOCKING: |
| 3441 | * |
| 3442 | */ |
| 3443 | |
| 3444 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, |
| 3445 | struct ata_host_set *host_set, |
| 3446 | struct ata_probe_ent *ent, unsigned int port_no) |
| 3447 | { |
| 3448 | unsigned int i; |
| 3449 | |
| 3450 | host->max_id = 16; |
| 3451 | host->max_lun = 1; |
| 3452 | host->max_channel = 1; |
| 3453 | host->unique_id = ata_unique_id++; |
| 3454 | host->max_cmd_len = 12; |
| 3455 | scsi_set_device(host, ent->dev); |
| 3456 | scsi_assign_lock(host, &host_set->lock); |
| 3457 | |
| 3458 | ap->flags = ATA_FLAG_PORT_DISABLED; |
| 3459 | ap->id = host->unique_id; |
| 3460 | ap->host = host; |
| 3461 | ap->ctl = ATA_DEVCTL_OBS; |
| 3462 | ap->host_set = host_set; |
| 3463 | ap->port_no = port_no; |
| 3464 | ap->hard_port_no = |
| 3465 | ent->legacy_mode ? ent->hard_port_no : port_no; |
| 3466 | ap->pio_mask = ent->pio_mask; |
| 3467 | ap->mwdma_mask = ent->mwdma_mask; |
| 3468 | ap->udma_mask = ent->udma_mask; |
| 3469 | ap->flags |= ent->host_flags; |
| 3470 | ap->ops = ent->port_ops; |
| 3471 | ap->cbl = ATA_CBL_NONE; |
| 3472 | ap->active_tag = ATA_TAG_POISON; |
| 3473 | ap->last_ctl = 0xFF; |
| 3474 | |
| 3475 | INIT_WORK(&ap->packet_task, atapi_packet_task, ap); |
| 3476 | INIT_WORK(&ap->pio_task, ata_pio_task, ap); |
| 3477 | |
| 3478 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 3479 | ap->device[i].devno = i; |
| 3480 | |
| 3481 | #ifdef ATA_IRQ_TRAP |
| 3482 | ap->stats.unhandled_irq = 1; |
| 3483 | ap->stats.idle_irq = 1; |
| 3484 | #endif |
| 3485 | |
| 3486 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); |
| 3487 | } |
| 3488 | |
| 3489 | /** |
| 3490 | * ata_host_add - Attach low-level ATA driver to system |
| 3491 | * @ent: Information provided by low-level driver |
| 3492 | * @host_set: Collections of ports to which we add |
| 3493 | * @port_no: Port number associated with this host |
| 3494 | * |
| 3495 | * LOCKING: |
| 3496 | * |
| 3497 | * RETURNS: |
| 3498 | * |
| 3499 | */ |
| 3500 | |
| 3501 | static struct ata_port * ata_host_add(struct ata_probe_ent *ent, |
| 3502 | struct ata_host_set *host_set, |
| 3503 | unsigned int port_no) |
| 3504 | { |
| 3505 | struct Scsi_Host *host; |
| 3506 | struct ata_port *ap; |
| 3507 | int rc; |
| 3508 | |
| 3509 | DPRINTK("ENTER\n"); |
| 3510 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
| 3511 | if (!host) |
| 3512 | return NULL; |
| 3513 | |
| 3514 | ap = (struct ata_port *) &host->hostdata[0]; |
| 3515 | |
| 3516 | ata_host_init(ap, host, host_set, ent, port_no); |
| 3517 | |
| 3518 | rc = ap->ops->port_start(ap); |
| 3519 | if (rc) |
| 3520 | goto err_out; |
| 3521 | |
| 3522 | return ap; |
| 3523 | |
| 3524 | err_out: |
| 3525 | scsi_host_put(host); |
| 3526 | return NULL; |
| 3527 | } |
| 3528 | |
| 3529 | /** |
| 3530 | * ata_device_add - |
| 3531 | * @ent: |
| 3532 | * |
| 3533 | * LOCKING: |
| 3534 | * |
| 3535 | * RETURNS: |
| 3536 | * |
| 3537 | */ |
| 3538 | |
| 3539 | int ata_device_add(struct ata_probe_ent *ent) |
| 3540 | { |
| 3541 | unsigned int count = 0, i; |
| 3542 | struct device *dev = ent->dev; |
| 3543 | struct ata_host_set *host_set; |
| 3544 | |
| 3545 | DPRINTK("ENTER\n"); |
| 3546 | /* alloc a container for our list of ATA ports (buses) */ |
| 3547 | host_set = kmalloc(sizeof(struct ata_host_set) + |
| 3548 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
| 3549 | if (!host_set) |
| 3550 | return 0; |
| 3551 | memset(host_set, 0, sizeof(struct ata_host_set) + (ent->n_ports * sizeof(void *))); |
| 3552 | spin_lock_init(&host_set->lock); |
| 3553 | |
| 3554 | host_set->dev = dev; |
| 3555 | host_set->n_ports = ent->n_ports; |
| 3556 | host_set->irq = ent->irq; |
| 3557 | host_set->mmio_base = ent->mmio_base; |
| 3558 | host_set->private_data = ent->private_data; |
| 3559 | host_set->ops = ent->port_ops; |
| 3560 | |
| 3561 | /* register each port bound to this device */ |
| 3562 | for (i = 0; i < ent->n_ports; i++) { |
| 3563 | struct ata_port *ap; |
| 3564 | unsigned long xfer_mode_mask; |
| 3565 | |
| 3566 | ap = ata_host_add(ent, host_set, i); |
| 3567 | if (!ap) |
| 3568 | goto err_out; |
| 3569 | |
| 3570 | host_set->ports[i] = ap; |
| 3571 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | |
| 3572 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | |
| 3573 | (ap->pio_mask << ATA_SHIFT_PIO); |
| 3574 | |
| 3575 | /* print per-port info to dmesg */ |
| 3576 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " |
| 3577 | "bmdma 0x%lX irq %lu\n", |
| 3578 | ap->id, |
| 3579 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', |
| 3580 | ata_mode_string(xfer_mode_mask), |
| 3581 | ap->ioaddr.cmd_addr, |
| 3582 | ap->ioaddr.ctl_addr, |
| 3583 | ap->ioaddr.bmdma_addr, |
| 3584 | ent->irq); |
| 3585 | |
| 3586 | ata_chk_status(ap); |
| 3587 | host_set->ops->irq_clear(ap); |
| 3588 | count++; |
| 3589 | } |
| 3590 | |
| 3591 | if (!count) { |
| 3592 | kfree(host_set); |
| 3593 | return 0; |
| 3594 | } |
| 3595 | |
| 3596 | /* obtain irq, that is shared between channels */ |
| 3597 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, |
| 3598 | DRV_NAME, host_set)) |
| 3599 | goto err_out; |
| 3600 | |
| 3601 | /* perform each probe synchronously */ |
| 3602 | DPRINTK("probe begin\n"); |
| 3603 | for (i = 0; i < count; i++) { |
| 3604 | struct ata_port *ap; |
| 3605 | int rc; |
| 3606 | |
| 3607 | ap = host_set->ports[i]; |
| 3608 | |
| 3609 | DPRINTK("ata%u: probe begin\n", ap->id); |
| 3610 | rc = ata_bus_probe(ap); |
| 3611 | DPRINTK("ata%u: probe end\n", ap->id); |
| 3612 | |
| 3613 | if (rc) { |
| 3614 | /* FIXME: do something useful here? |
| 3615 | * Current libata behavior will |
| 3616 | * tear down everything when |
| 3617 | * the module is removed |
| 3618 | * or the h/w is unplugged. |
| 3619 | */ |
| 3620 | } |
| 3621 | |
| 3622 | rc = scsi_add_host(ap->host, dev); |
| 3623 | if (rc) { |
| 3624 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", |
| 3625 | ap->id); |
| 3626 | /* FIXME: do something useful here */ |
| 3627 | /* FIXME: handle unconditional calls to |
| 3628 | * scsi_scan_host and ata_host_remove, below, |
| 3629 | * at the very least |
| 3630 | */ |
| 3631 | } |
| 3632 | } |
| 3633 | |
| 3634 | /* probes are done, now scan each port's disk(s) */ |
| 3635 | DPRINTK("probe begin\n"); |
| 3636 | for (i = 0; i < count; i++) { |
| 3637 | struct ata_port *ap = host_set->ports[i]; |
| 3638 | |
| 3639 | scsi_scan_host(ap->host); |
| 3640 | } |
| 3641 | |
| 3642 | dev_set_drvdata(dev, host_set); |
| 3643 | |
| 3644 | VPRINTK("EXIT, returning %u\n", ent->n_ports); |
| 3645 | return ent->n_ports; /* success */ |
| 3646 | |
| 3647 | err_out: |
| 3648 | for (i = 0; i < count; i++) { |
| 3649 | ata_host_remove(host_set->ports[i], 1); |
| 3650 | scsi_host_put(host_set->ports[i]->host); |
| 3651 | } |
| 3652 | kfree(host_set); |
| 3653 | VPRINTK("EXIT, returning 0\n"); |
| 3654 | return 0; |
| 3655 | } |
| 3656 | |
| 3657 | /** |
| 3658 | * ata_scsi_release - SCSI layer callback hook for host unload |
| 3659 | * @host: libata host to be unloaded |
| 3660 | * |
| 3661 | * Performs all duties necessary to shut down a libata port... |
| 3662 | * Kill port kthread, disable port, and release resources. |
| 3663 | * |
| 3664 | * LOCKING: |
| 3665 | * Inherited from SCSI layer. |
| 3666 | * |
| 3667 | * RETURNS: |
| 3668 | * One. |
| 3669 | */ |
| 3670 | |
| 3671 | int ata_scsi_release(struct Scsi_Host *host) |
| 3672 | { |
| 3673 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; |
| 3674 | |
| 3675 | DPRINTK("ENTER\n"); |
| 3676 | |
| 3677 | ap->ops->port_disable(ap); |
| 3678 | ata_host_remove(ap, 0); |
| 3679 | |
| 3680 | DPRINTK("EXIT\n"); |
| 3681 | return 1; |
| 3682 | } |
| 3683 | |
| 3684 | /** |
| 3685 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 3686 | * @ioaddr: IO address structure to be initialized |
| 3687 | */ |
| 3688 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 3689 | { |
| 3690 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 3691 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 3692 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 3693 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 3694 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 3695 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 3696 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 3697 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 3698 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 3699 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 3700 | } |
| 3701 | |
| 3702 | static struct ata_probe_ent * |
| 3703 | ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) |
| 3704 | { |
| 3705 | struct ata_probe_ent *probe_ent; |
| 3706 | |
| 3707 | probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); |
| 3708 | if (!probe_ent) { |
| 3709 | printk(KERN_ERR DRV_NAME "(%s): out of memory\n", |
| 3710 | kobject_name(&(dev->kobj))); |
| 3711 | return NULL; |
| 3712 | } |
| 3713 | |
| 3714 | memset(probe_ent, 0, sizeof(*probe_ent)); |
| 3715 | |
| 3716 | INIT_LIST_HEAD(&probe_ent->node); |
| 3717 | probe_ent->dev = dev; |
| 3718 | |
| 3719 | probe_ent->sht = port->sht; |
| 3720 | probe_ent->host_flags = port->host_flags; |
| 3721 | probe_ent->pio_mask = port->pio_mask; |
| 3722 | probe_ent->mwdma_mask = port->mwdma_mask; |
| 3723 | probe_ent->udma_mask = port->udma_mask; |
| 3724 | probe_ent->port_ops = port->port_ops; |
| 3725 | |
| 3726 | return probe_ent; |
| 3727 | } |
| 3728 | |
| 3729 | #ifdef CONFIG_PCI |
| 3730 | struct ata_probe_ent * |
| 3731 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port) |
| 3732 | { |
| 3733 | struct ata_probe_ent *probe_ent = |
| 3734 | ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); |
| 3735 | if (!probe_ent) |
| 3736 | return NULL; |
| 3737 | |
| 3738 | probe_ent->n_ports = 2; |
| 3739 | probe_ent->irq = pdev->irq; |
| 3740 | probe_ent->irq_flags = SA_SHIRQ; |
| 3741 | |
| 3742 | probe_ent->port[0].cmd_addr = pci_resource_start(pdev, 0); |
| 3743 | probe_ent->port[0].altstatus_addr = |
| 3744 | probe_ent->port[0].ctl_addr = |
| 3745 | pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS; |
| 3746 | probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4); |
| 3747 | |
| 3748 | probe_ent->port[1].cmd_addr = pci_resource_start(pdev, 2); |
| 3749 | probe_ent->port[1].altstatus_addr = |
| 3750 | probe_ent->port[1].ctl_addr = |
| 3751 | pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS; |
| 3752 | probe_ent->port[1].bmdma_addr = pci_resource_start(pdev, 4) + 8; |
| 3753 | |
| 3754 | ata_std_ports(&probe_ent->port[0]); |
| 3755 | ata_std_ports(&probe_ent->port[1]); |
| 3756 | |
| 3757 | return probe_ent; |
| 3758 | } |
| 3759 | |
| 3760 | static struct ata_probe_ent * |
| 3761 | ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port, |
| 3762 | struct ata_probe_ent **ppe2) |
| 3763 | { |
| 3764 | struct ata_probe_ent *probe_ent, *probe_ent2; |
| 3765 | |
| 3766 | probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); |
| 3767 | if (!probe_ent) |
| 3768 | return NULL; |
| 3769 | probe_ent2 = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[1]); |
| 3770 | if (!probe_ent2) { |
| 3771 | kfree(probe_ent); |
| 3772 | return NULL; |
| 3773 | } |
| 3774 | |
| 3775 | probe_ent->n_ports = 1; |
| 3776 | probe_ent->irq = 14; |
| 3777 | |
| 3778 | probe_ent->hard_port_no = 0; |
| 3779 | probe_ent->legacy_mode = 1; |
| 3780 | |
| 3781 | probe_ent2->n_ports = 1; |
| 3782 | probe_ent2->irq = 15; |
| 3783 | |
| 3784 | probe_ent2->hard_port_no = 1; |
| 3785 | probe_ent2->legacy_mode = 1; |
| 3786 | |
| 3787 | probe_ent->port[0].cmd_addr = 0x1f0; |
| 3788 | probe_ent->port[0].altstatus_addr = |
| 3789 | probe_ent->port[0].ctl_addr = 0x3f6; |
| 3790 | probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4); |
| 3791 | |
| 3792 | probe_ent2->port[0].cmd_addr = 0x170; |
| 3793 | probe_ent2->port[0].altstatus_addr = |
| 3794 | probe_ent2->port[0].ctl_addr = 0x376; |
| 3795 | probe_ent2->port[0].bmdma_addr = pci_resource_start(pdev, 4)+8; |
| 3796 | |
| 3797 | ata_std_ports(&probe_ent->port[0]); |
| 3798 | ata_std_ports(&probe_ent2->port[0]); |
| 3799 | |
| 3800 | *ppe2 = probe_ent2; |
| 3801 | return probe_ent; |
| 3802 | } |
| 3803 | |
| 3804 | /** |
| 3805 | * ata_pci_init_one - Initialize/register PCI IDE host controller |
| 3806 | * @pdev: Controller to be initialized |
| 3807 | * @port_info: Information from low-level host driver |
| 3808 | * @n_ports: Number of ports attached to host controller |
| 3809 | * |
| 3810 | * LOCKING: |
| 3811 | * Inherited from PCI layer (may sleep). |
| 3812 | * |
| 3813 | * RETURNS: |
| 3814 | * |
| 3815 | */ |
| 3816 | |
| 3817 | int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, |
| 3818 | unsigned int n_ports) |
| 3819 | { |
| 3820 | struct ata_probe_ent *probe_ent, *probe_ent2 = NULL; |
| 3821 | struct ata_port_info *port[2]; |
| 3822 | u8 tmp8, mask; |
| 3823 | unsigned int legacy_mode = 0; |
| 3824 | int disable_dev_on_err = 1; |
| 3825 | int rc; |
| 3826 | |
| 3827 | DPRINTK("ENTER\n"); |
| 3828 | |
| 3829 | port[0] = port_info[0]; |
| 3830 | if (n_ports > 1) |
| 3831 | port[1] = port_info[1]; |
| 3832 | else |
| 3833 | port[1] = port[0]; |
| 3834 | |
| 3835 | if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0 |
| 3836 | && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { |
| 3837 | /* TODO: support transitioning to native mode? */ |
| 3838 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); |
| 3839 | mask = (1 << 2) | (1 << 0); |
| 3840 | if ((tmp8 & mask) != mask) |
| 3841 | legacy_mode = (1 << 3); |
| 3842 | } |
| 3843 | |
| 3844 | /* FIXME... */ |
| 3845 | if ((!legacy_mode) && (n_ports > 1)) { |
| 3846 | printk(KERN_ERR "ata: BUG: native mode, n_ports > 1\n"); |
| 3847 | return -EINVAL; |
| 3848 | } |
| 3849 | |
| 3850 | rc = pci_enable_device(pdev); |
| 3851 | if (rc) |
| 3852 | return rc; |
| 3853 | |
| 3854 | rc = pci_request_regions(pdev, DRV_NAME); |
| 3855 | if (rc) { |
| 3856 | disable_dev_on_err = 0; |
| 3857 | goto err_out; |
| 3858 | } |
| 3859 | |
| 3860 | if (legacy_mode) { |
| 3861 | if (!request_region(0x1f0, 8, "libata")) { |
| 3862 | struct resource *conflict, res; |
| 3863 | res.start = 0x1f0; |
| 3864 | res.end = 0x1f0 + 8 - 1; |
| 3865 | conflict = ____request_resource(&ioport_resource, &res); |
| 3866 | if (!strcmp(conflict->name, "libata")) |
| 3867 | legacy_mode |= (1 << 0); |
| 3868 | else { |
| 3869 | disable_dev_on_err = 0; |
| 3870 | printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n"); |
| 3871 | } |
| 3872 | } else |
| 3873 | legacy_mode |= (1 << 0); |
| 3874 | |
| 3875 | if (!request_region(0x170, 8, "libata")) { |
| 3876 | struct resource *conflict, res; |
| 3877 | res.start = 0x170; |
| 3878 | res.end = 0x170 + 8 - 1; |
| 3879 | conflict = ____request_resource(&ioport_resource, &res); |
| 3880 | if (!strcmp(conflict->name, "libata")) |
| 3881 | legacy_mode |= (1 << 1); |
| 3882 | else { |
| 3883 | disable_dev_on_err = 0; |
| 3884 | printk(KERN_WARNING "ata: 0x170 IDE port busy\n"); |
| 3885 | } |
| 3886 | } else |
| 3887 | legacy_mode |= (1 << 1); |
| 3888 | } |
| 3889 | |
| 3890 | /* we have legacy mode, but all ports are unavailable */ |
| 3891 | if (legacy_mode == (1 << 3)) { |
| 3892 | rc = -EBUSY; |
| 3893 | goto err_out_regions; |
| 3894 | } |
| 3895 | |
| 3896 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 3897 | if (rc) |
| 3898 | goto err_out_regions; |
| 3899 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 3900 | if (rc) |
| 3901 | goto err_out_regions; |
| 3902 | |
| 3903 | if (legacy_mode) { |
| 3904 | probe_ent = ata_pci_init_legacy_mode(pdev, port, &probe_ent2); |
| 3905 | } else |
| 3906 | probe_ent = ata_pci_init_native_mode(pdev, port); |
| 3907 | if (!probe_ent) { |
| 3908 | rc = -ENOMEM; |
| 3909 | goto err_out_regions; |
| 3910 | } |
| 3911 | |
| 3912 | pci_set_master(pdev); |
| 3913 | |
| 3914 | /* FIXME: check ata_device_add return */ |
| 3915 | if (legacy_mode) { |
| 3916 | if (legacy_mode & (1 << 0)) |
| 3917 | ata_device_add(probe_ent); |
| 3918 | if (legacy_mode & (1 << 1)) |
| 3919 | ata_device_add(probe_ent2); |
| 3920 | } else |
| 3921 | ata_device_add(probe_ent); |
| 3922 | |
| 3923 | kfree(probe_ent); |
| 3924 | kfree(probe_ent2); |
| 3925 | |
| 3926 | return 0; |
| 3927 | |
| 3928 | err_out_regions: |
| 3929 | if (legacy_mode & (1 << 0)) |
| 3930 | release_region(0x1f0, 8); |
| 3931 | if (legacy_mode & (1 << 1)) |
| 3932 | release_region(0x170, 8); |
| 3933 | pci_release_regions(pdev); |
| 3934 | err_out: |
| 3935 | if (disable_dev_on_err) |
| 3936 | pci_disable_device(pdev); |
| 3937 | return rc; |
| 3938 | } |
| 3939 | |
| 3940 | /** |
| 3941 | * ata_pci_remove_one - PCI layer callback for device removal |
| 3942 | * @pdev: PCI device that was removed |
| 3943 | * |
| 3944 | * PCI layer indicates to libata via this hook that |
| 3945 | * hot-unplug or module unload event has occured. |
| 3946 | * Handle this by unregistering all objects associated |
| 3947 | * with this PCI device. Free those objects. Then finally |
| 3948 | * release PCI resources and disable device. |
| 3949 | * |
| 3950 | * LOCKING: |
| 3951 | * Inherited from PCI layer (may sleep). |
| 3952 | */ |
| 3953 | |
| 3954 | void ata_pci_remove_one (struct pci_dev *pdev) |
| 3955 | { |
| 3956 | struct device *dev = pci_dev_to_dev(pdev); |
| 3957 | struct ata_host_set *host_set = dev_get_drvdata(dev); |
| 3958 | struct ata_port *ap; |
| 3959 | unsigned int i; |
| 3960 | |
| 3961 | for (i = 0; i < host_set->n_ports; i++) { |
| 3962 | ap = host_set->ports[i]; |
| 3963 | |
| 3964 | scsi_remove_host(ap->host); |
| 3965 | } |
| 3966 | |
| 3967 | free_irq(host_set->irq, host_set); |
| 3968 | if (host_set->ops->host_stop) |
| 3969 | host_set->ops->host_stop(host_set); |
| 3970 | if (host_set->mmio_base) |
| 3971 | iounmap(host_set->mmio_base); |
| 3972 | |
| 3973 | for (i = 0; i < host_set->n_ports; i++) { |
| 3974 | ap = host_set->ports[i]; |
| 3975 | |
| 3976 | ata_scsi_release(ap->host); |
| 3977 | |
| 3978 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { |
| 3979 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 3980 | |
| 3981 | if (ioaddr->cmd_addr == 0x1f0) |
| 3982 | release_region(0x1f0, 8); |
| 3983 | else if (ioaddr->cmd_addr == 0x170) |
| 3984 | release_region(0x170, 8); |
| 3985 | } |
| 3986 | |
| 3987 | scsi_host_put(ap->host); |
| 3988 | } |
| 3989 | |
| 3990 | kfree(host_set); |
| 3991 | |
| 3992 | pci_release_regions(pdev); |
| 3993 | pci_disable_device(pdev); |
| 3994 | dev_set_drvdata(dev, NULL); |
| 3995 | } |
| 3996 | |
| 3997 | /* move to PCI subsystem */ |
| 3998 | int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits) |
| 3999 | { |
| 4000 | unsigned long tmp = 0; |
| 4001 | |
| 4002 | switch (bits->width) { |
| 4003 | case 1: { |
| 4004 | u8 tmp8 = 0; |
| 4005 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 4006 | tmp = tmp8; |
| 4007 | break; |
| 4008 | } |
| 4009 | case 2: { |
| 4010 | u16 tmp16 = 0; |
| 4011 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 4012 | tmp = tmp16; |
| 4013 | break; |
| 4014 | } |
| 4015 | case 4: { |
| 4016 | u32 tmp32 = 0; |
| 4017 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 4018 | tmp = tmp32; |
| 4019 | break; |
| 4020 | } |
| 4021 | |
| 4022 | default: |
| 4023 | return -EINVAL; |
| 4024 | } |
| 4025 | |
| 4026 | tmp &= bits->mask; |
| 4027 | |
| 4028 | return (tmp == bits->val) ? 1 : 0; |
| 4029 | } |
| 4030 | #endif /* CONFIG_PCI */ |
| 4031 | |
| 4032 | |
| 4033 | /** |
| 4034 | * ata_init - |
| 4035 | * |
| 4036 | * LOCKING: |
| 4037 | * |
| 4038 | * RETURNS: |
| 4039 | * |
| 4040 | */ |
| 4041 | |
| 4042 | static int __init ata_init(void) |
| 4043 | { |
| 4044 | ata_wq = create_workqueue("ata"); |
| 4045 | if (!ata_wq) |
| 4046 | return -ENOMEM; |
| 4047 | |
| 4048 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 4049 | return 0; |
| 4050 | } |
| 4051 | |
| 4052 | static void __exit ata_exit(void) |
| 4053 | { |
| 4054 | destroy_workqueue(ata_wq); |
| 4055 | } |
| 4056 | |
| 4057 | module_init(ata_init); |
| 4058 | module_exit(ata_exit); |
| 4059 | |
| 4060 | /* |
| 4061 | * libata is essentially a library of internal helper functions for |
| 4062 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 4063 | * likely to change as new drivers are added and updated. |
| 4064 | * Do not depend on ABI/API stability. |
| 4065 | */ |
| 4066 | |
| 4067 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 4068 | EXPORT_SYMBOL_GPL(ata_std_ports); |
| 4069 | EXPORT_SYMBOL_GPL(ata_device_add); |
| 4070 | EXPORT_SYMBOL_GPL(ata_sg_init); |
| 4071 | EXPORT_SYMBOL_GPL(ata_sg_init_one); |
| 4072 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
| 4073 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
| 4074 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
| 4075 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 4076 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 4077 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 4078 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
| 4079 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 4080 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| 4081 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 4082 | EXPORT_SYMBOL_GPL(ata_altstatus); |
| 4083 | EXPORT_SYMBOL_GPL(ata_chk_err); |
| 4084 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 4085 | EXPORT_SYMBOL_GPL(ata_port_start); |
| 4086 | EXPORT_SYMBOL_GPL(ata_port_stop); |
| 4087 | EXPORT_SYMBOL_GPL(ata_interrupt); |
| 4088 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
| 4089 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 4090 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 4091 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 4092 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 4093 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
| 4094 | EXPORT_SYMBOL_GPL(ata_port_probe); |
| 4095 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
| 4096 | EXPORT_SYMBOL_GPL(__sata_phy_reset); |
| 4097 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
| 4098 | EXPORT_SYMBOL_GPL(ata_port_disable); |
| 4099 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 4100 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
| 4101 | EXPORT_SYMBOL_GPL(ata_scsi_error); |
| 4102 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
| 4103 | EXPORT_SYMBOL_GPL(ata_scsi_release); |
| 4104 | EXPORT_SYMBOL_GPL(ata_host_intr); |
| 4105 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 4106 | EXPORT_SYMBOL_GPL(ata_dev_id_string); |
| 4107 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| 4108 | |
| 4109 | #ifdef CONFIG_PCI |
| 4110 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
| 4111 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
| 4112 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 4113 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
| 4114 | #endif /* CONFIG_PCI */ |