Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jeff Garzik | af36d7f | 2005-08-28 20:18:39 -0400 | [diff] [blame] | 2 | * libata-core.c - helper library for ATA |
| 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| 9 | * Copyright 2003-2004 Jeff Garzik |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2, or (at your option) |
| 15 | * any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; see the file COPYING. If not, write to |
| 24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
| 26 | * |
| 27 | * libata documentation is available via 'make {ps|pdf}docs', |
| 28 | * as Documentation/DocBook/libata.* |
| 29 | * |
| 30 | * Hardware documentation available from http://www.t13.org/ and |
| 31 | * http://www.sata-io.org/ |
| 32 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | */ |
| 34 | |
| 35 | #include <linux/config.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/list.h> |
| 41 | #include <linux/mm.h> |
| 42 | #include <linux/highmem.h> |
| 43 | #include <linux/spinlock.h> |
| 44 | #include <linux/blkdev.h> |
| 45 | #include <linux/delay.h> |
| 46 | #include <linux/timer.h> |
| 47 | #include <linux/interrupt.h> |
| 48 | #include <linux/completion.h> |
| 49 | #include <linux/suspend.h> |
| 50 | #include <linux/workqueue.h> |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 51 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <scsi/scsi.h> |
| 53 | #include "scsi.h" |
| 54 | #include "scsi_priv.h" |
| 55 | #include <scsi/scsi_host.h> |
| 56 | #include <linux/libata.h> |
| 57 | #include <asm/io.h> |
| 58 | #include <asm/semaphore.h> |
| 59 | #include <asm/byteorder.h> |
| 60 | |
| 61 | #include "libata.h" |
| 62 | |
| 63 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 64 | unsigned long tmout_pat, |
| 65 | unsigned long tmout); |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame^] | 66 | static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev); |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 67 | 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] | 68 | static void ata_set_mode(struct ata_port *ap); |
| 69 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); |
| 70 | static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift); |
| 71 | static int fgb(u32 bitmap); |
| 72 | static int ata_choose_xfer_mode(struct ata_port *ap, |
| 73 | u8 *xfer_mode_out, |
| 74 | unsigned int *xfer_shift_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | static void __ata_qc_complete(struct ata_queued_cmd *qc); |
| 76 | |
| 77 | static unsigned int ata_unique_id = 1; |
| 78 | static struct workqueue_struct *ata_wq; |
| 79 | |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 80 | int atapi_enabled = 0; |
| 81 | module_param(atapi_enabled, int, 0444); |
| 82 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | MODULE_AUTHOR("Jeff Garzik"); |
| 85 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 86 | MODULE_LICENSE("GPL"); |
| 87 | MODULE_VERSION(DRV_VERSION); |
| 88 | |
| 89 | /** |
| 90 | * ata_tf_load - send taskfile registers to host controller |
| 91 | * @ap: Port to which output is sent |
| 92 | * @tf: ATA taskfile register set |
| 93 | * |
| 94 | * Outputs ATA taskfile to standard ATA host controller. |
| 95 | * |
| 96 | * LOCKING: |
| 97 | * Inherited from caller. |
| 98 | */ |
| 99 | |
| 100 | static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 101 | { |
| 102 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 103 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 104 | |
| 105 | if (tf->ctl != ap->last_ctl) { |
| 106 | outb(tf->ctl, ioaddr->ctl_addr); |
| 107 | ap->last_ctl = tf->ctl; |
| 108 | ata_wait_idle(ap); |
| 109 | } |
| 110 | |
| 111 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 112 | outb(tf->hob_feature, ioaddr->feature_addr); |
| 113 | outb(tf->hob_nsect, ioaddr->nsect_addr); |
| 114 | outb(tf->hob_lbal, ioaddr->lbal_addr); |
| 115 | outb(tf->hob_lbam, ioaddr->lbam_addr); |
| 116 | outb(tf->hob_lbah, ioaddr->lbah_addr); |
| 117 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 118 | tf->hob_feature, |
| 119 | tf->hob_nsect, |
| 120 | tf->hob_lbal, |
| 121 | tf->hob_lbam, |
| 122 | tf->hob_lbah); |
| 123 | } |
| 124 | |
| 125 | if (is_addr) { |
| 126 | outb(tf->feature, ioaddr->feature_addr); |
| 127 | outb(tf->nsect, ioaddr->nsect_addr); |
| 128 | outb(tf->lbal, ioaddr->lbal_addr); |
| 129 | outb(tf->lbam, ioaddr->lbam_addr); |
| 130 | outb(tf->lbah, ioaddr->lbah_addr); |
| 131 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 132 | tf->feature, |
| 133 | tf->nsect, |
| 134 | tf->lbal, |
| 135 | tf->lbam, |
| 136 | tf->lbah); |
| 137 | } |
| 138 | |
| 139 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 140 | outb(tf->device, ioaddr->device_addr); |
| 141 | VPRINTK("device 0x%X\n", tf->device); |
| 142 | } |
| 143 | |
| 144 | ata_wait_idle(ap); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * ata_tf_load_mmio - send taskfile registers to host controller |
| 149 | * @ap: Port to which output is sent |
| 150 | * @tf: ATA taskfile register set |
| 151 | * |
| 152 | * Outputs ATA taskfile to standard ATA host controller using MMIO. |
| 153 | * |
| 154 | * LOCKING: |
| 155 | * Inherited from caller. |
| 156 | */ |
| 157 | |
| 158 | static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 159 | { |
| 160 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 161 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 162 | |
| 163 | if (tf->ctl != ap->last_ctl) { |
| 164 | writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr); |
| 165 | ap->last_ctl = tf->ctl; |
| 166 | ata_wait_idle(ap); |
| 167 | } |
| 168 | |
| 169 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 170 | writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr); |
| 171 | writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr); |
| 172 | writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr); |
| 173 | writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr); |
| 174 | writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr); |
| 175 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 176 | tf->hob_feature, |
| 177 | tf->hob_nsect, |
| 178 | tf->hob_lbal, |
| 179 | tf->hob_lbam, |
| 180 | tf->hob_lbah); |
| 181 | } |
| 182 | |
| 183 | if (is_addr) { |
| 184 | writeb(tf->feature, (void __iomem *) ioaddr->feature_addr); |
| 185 | writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr); |
| 186 | writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr); |
| 187 | writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr); |
| 188 | writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr); |
| 189 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 190 | tf->feature, |
| 191 | tf->nsect, |
| 192 | tf->lbal, |
| 193 | tf->lbam, |
| 194 | tf->lbah); |
| 195 | } |
| 196 | |
| 197 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 198 | writeb(tf->device, (void __iomem *) ioaddr->device_addr); |
| 199 | VPRINTK("device 0x%X\n", tf->device); |
| 200 | } |
| 201 | |
| 202 | ata_wait_idle(ap); |
| 203 | } |
| 204 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 205 | |
| 206 | /** |
| 207 | * ata_tf_load - send taskfile registers to host controller |
| 208 | * @ap: Port to which output is sent |
| 209 | * @tf: ATA taskfile register set |
| 210 | * |
| 211 | * Outputs ATA taskfile to standard ATA host controller using MMIO |
| 212 | * or PIO as indicated by the ATA_FLAG_MMIO flag. |
| 213 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
| 214 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
| 215 | * hob_lbal, hob_lbam, and hob_lbah. |
| 216 | * |
| 217 | * This function waits for idle (!BUSY and !DRQ) after writing |
| 218 | * registers. If the control register has a new value, this |
| 219 | * function also waits for idle after writing control and before |
| 220 | * writing the remaining registers. |
| 221 | * |
| 222 | * May be used as the tf_load() entry in ata_port_operations. |
| 223 | * |
| 224 | * LOCKING: |
| 225 | * Inherited from caller. |
| 226 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) |
| 228 | { |
| 229 | if (ap->flags & ATA_FLAG_MMIO) |
| 230 | ata_tf_load_mmio(ap, tf); |
| 231 | else |
| 232 | ata_tf_load_pio(ap, tf); |
| 233 | } |
| 234 | |
| 235 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 236 | * ata_exec_command_pio - issue ATA command to host controller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | * @ap: port to which command is being issued |
| 238 | * @tf: ATA taskfile register set |
| 239 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 240 | * Issues PIO write to ATA command register, with proper |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | * synchronization with interrupt handler / other threads. |
| 242 | * |
| 243 | * LOCKING: |
| 244 | * spin_lock_irqsave(host_set lock) |
| 245 | */ |
| 246 | |
| 247 | static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 248 | { |
| 249 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 250 | |
| 251 | outb(tf->command, ap->ioaddr.command_addr); |
| 252 | ata_pause(ap); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | /** |
| 257 | * ata_exec_command_mmio - issue ATA command to host controller |
| 258 | * @ap: port to which command is being issued |
| 259 | * @tf: ATA taskfile register set |
| 260 | * |
| 261 | * Issues MMIO write to ATA command register, with proper |
| 262 | * synchronization with interrupt handler / other threads. |
| 263 | * |
| 264 | * LOCKING: |
| 265 | * spin_lock_irqsave(host_set lock) |
| 266 | */ |
| 267 | |
| 268 | static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 269 | { |
| 270 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 271 | |
| 272 | writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr); |
| 273 | ata_pause(ap); |
| 274 | } |
| 275 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 276 | |
| 277 | /** |
| 278 | * ata_exec_command - issue ATA command to host controller |
| 279 | * @ap: port to which command is being issued |
| 280 | * @tf: ATA taskfile register set |
| 281 | * |
| 282 | * Issues PIO/MMIO write to ATA command register, with proper |
| 283 | * synchronization with interrupt handler / other threads. |
| 284 | * |
| 285 | * LOCKING: |
| 286 | * spin_lock_irqsave(host_set lock) |
| 287 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) |
| 289 | { |
| 290 | if (ap->flags & ATA_FLAG_MMIO) |
| 291 | ata_exec_command_mmio(ap, tf); |
| 292 | else |
| 293 | ata_exec_command_pio(ap, tf); |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * ata_exec - issue ATA command to host controller |
| 298 | * @ap: port to which command is being issued |
| 299 | * @tf: ATA taskfile register set |
| 300 | * |
| 301 | * Issues PIO/MMIO write to ATA command register, with proper |
| 302 | * synchronization with interrupt handler / other threads. |
| 303 | * |
| 304 | * LOCKING: |
| 305 | * Obtains host_set lock. |
| 306 | */ |
| 307 | |
| 308 | static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) |
| 309 | { |
| 310 | unsigned long flags; |
| 311 | |
| 312 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 313 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 314 | ap->ops->exec_command(ap, tf); |
| 315 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 320 | * @ap: port to which command is being issued |
| 321 | * @tf: ATA taskfile register set |
| 322 | * |
| 323 | * Issues ATA taskfile register set to ATA host controller, |
| 324 | * with proper synchronization with interrupt handler and |
| 325 | * other threads. |
| 326 | * |
| 327 | * LOCKING: |
| 328 | * Obtains host_set lock. |
| 329 | */ |
| 330 | |
| 331 | static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) |
| 332 | { |
| 333 | ap->ops->tf_load(ap, tf); |
| 334 | |
| 335 | ata_exec(ap, tf); |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * ata_tf_to_host_nolock - issue ATA taskfile to host controller |
| 340 | * @ap: port to which command is being issued |
| 341 | * @tf: ATA taskfile register set |
| 342 | * |
| 343 | * Issues ATA taskfile register set to ATA host controller, |
| 344 | * with proper synchronization with interrupt handler and |
| 345 | * other threads. |
| 346 | * |
| 347 | * LOCKING: |
| 348 | * spin_lock_irqsave(host_set lock) |
| 349 | */ |
| 350 | |
| 351 | void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) |
| 352 | { |
| 353 | ap->ops->tf_load(ap, tf); |
| 354 | ap->ops->exec_command(ap, tf); |
| 355 | } |
| 356 | |
| 357 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 358 | * ata_tf_read_pio - input device's ATA taskfile shadow registers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | * @ap: Port from which input is read |
| 360 | * @tf: ATA taskfile register set for storing input |
| 361 | * |
| 362 | * Reads ATA taskfile registers for currently-selected device |
| 363 | * into @tf. |
| 364 | * |
| 365 | * LOCKING: |
| 366 | * Inherited from caller. |
| 367 | */ |
| 368 | |
| 369 | static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 370 | { |
| 371 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 372 | |
| 373 | tf->nsect = inb(ioaddr->nsect_addr); |
| 374 | tf->lbal = inb(ioaddr->lbal_addr); |
| 375 | tf->lbam = inb(ioaddr->lbam_addr); |
| 376 | tf->lbah = inb(ioaddr->lbah_addr); |
| 377 | tf->device = inb(ioaddr->device_addr); |
| 378 | |
| 379 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 380 | outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr); |
| 381 | tf->hob_feature = inb(ioaddr->error_addr); |
| 382 | tf->hob_nsect = inb(ioaddr->nsect_addr); |
| 383 | tf->hob_lbal = inb(ioaddr->lbal_addr); |
| 384 | tf->hob_lbam = inb(ioaddr->lbam_addr); |
| 385 | tf->hob_lbah = inb(ioaddr->lbah_addr); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * ata_tf_read_mmio - input device's ATA taskfile shadow registers |
| 391 | * @ap: Port from which input is read |
| 392 | * @tf: ATA taskfile register set for storing input |
| 393 | * |
| 394 | * Reads ATA taskfile registers for currently-selected device |
| 395 | * into @tf via MMIO. |
| 396 | * |
| 397 | * LOCKING: |
| 398 | * Inherited from caller. |
| 399 | */ |
| 400 | |
| 401 | static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 402 | { |
| 403 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 404 | |
| 405 | tf->nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 406 | tf->lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 407 | tf->lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 408 | tf->lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 409 | tf->device = readb((void __iomem *)ioaddr->device_addr); |
| 410 | |
| 411 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 412 | writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr); |
| 413 | tf->hob_feature = readb((void __iomem *)ioaddr->error_addr); |
| 414 | tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 415 | tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 416 | tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 417 | tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 418 | } |
| 419 | } |
| 420 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 421 | |
| 422 | /** |
| 423 | * ata_tf_read - input device's ATA taskfile shadow registers |
| 424 | * @ap: Port from which input is read |
| 425 | * @tf: ATA taskfile register set for storing input |
| 426 | * |
| 427 | * Reads ATA taskfile registers for currently-selected device |
| 428 | * into @tf. |
| 429 | * |
| 430 | * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48 |
| 431 | * is set, also reads the hob registers. |
| 432 | * |
| 433 | * May be used as the tf_read() entry in ata_port_operations. |
| 434 | * |
| 435 | * LOCKING: |
| 436 | * Inherited from caller. |
| 437 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
| 439 | { |
| 440 | if (ap->flags & ATA_FLAG_MMIO) |
| 441 | ata_tf_read_mmio(ap, tf); |
| 442 | else |
| 443 | ata_tf_read_pio(ap, tf); |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * ata_check_status_pio - Read device status reg & clear interrupt |
| 448 | * @ap: port where the device is |
| 449 | * |
| 450 | * Reads ATA taskfile status register for currently-selected device |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 451 | * and return its value. This also clears pending interrupts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | * from this device |
| 453 | * |
| 454 | * LOCKING: |
| 455 | * Inherited from caller. |
| 456 | */ |
| 457 | static u8 ata_check_status_pio(struct ata_port *ap) |
| 458 | { |
| 459 | return inb(ap->ioaddr.status_addr); |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * ata_check_status_mmio - Read device status reg & clear interrupt |
| 464 | * @ap: port where the device is |
| 465 | * |
| 466 | * Reads ATA taskfile status register for currently-selected device |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 467 | * via MMIO and return its value. This also clears pending interrupts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | * from this device |
| 469 | * |
| 470 | * LOCKING: |
| 471 | * Inherited from caller. |
| 472 | */ |
| 473 | static u8 ata_check_status_mmio(struct ata_port *ap) |
| 474 | { |
| 475 | return readb((void __iomem *) ap->ioaddr.status_addr); |
| 476 | } |
| 477 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 478 | |
| 479 | /** |
| 480 | * ata_check_status - Read device status reg & clear interrupt |
| 481 | * @ap: port where the device is |
| 482 | * |
| 483 | * Reads ATA taskfile status register for currently-selected device |
| 484 | * and return its value. This also clears pending interrupts |
| 485 | * from this device |
| 486 | * |
| 487 | * May be used as the check_status() entry in ata_port_operations. |
| 488 | * |
| 489 | * LOCKING: |
| 490 | * Inherited from caller. |
| 491 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | u8 ata_check_status(struct ata_port *ap) |
| 493 | { |
| 494 | if (ap->flags & ATA_FLAG_MMIO) |
| 495 | return ata_check_status_mmio(ap); |
| 496 | return ata_check_status_pio(ap); |
| 497 | } |
| 498 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 499 | |
| 500 | /** |
| 501 | * ata_altstatus - Read device alternate status reg |
| 502 | * @ap: port where the device is |
| 503 | * |
| 504 | * Reads ATA taskfile alternate status register for |
| 505 | * currently-selected device and return its value. |
| 506 | * |
| 507 | * Note: may NOT be used as the check_altstatus() entry in |
| 508 | * ata_port_operations. |
| 509 | * |
| 510 | * LOCKING: |
| 511 | * Inherited from caller. |
| 512 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | u8 ata_altstatus(struct ata_port *ap) |
| 514 | { |
| 515 | if (ap->ops->check_altstatus) |
| 516 | return ap->ops->check_altstatus(ap); |
| 517 | |
| 518 | if (ap->flags & ATA_FLAG_MMIO) |
| 519 | return readb((void __iomem *)ap->ioaddr.altstatus_addr); |
| 520 | return inb(ap->ioaddr.altstatus_addr); |
| 521 | } |
| 522 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 523 | |
| 524 | /** |
| 525 | * ata_chk_err - Read device error reg |
| 526 | * @ap: port where the device is |
| 527 | * |
| 528 | * Reads ATA taskfile error register for |
| 529 | * currently-selected device and return its value. |
| 530 | * |
| 531 | * Note: may NOT be used as the check_err() entry in |
| 532 | * ata_port_operations. |
| 533 | * |
| 534 | * LOCKING: |
| 535 | * Inherited from caller. |
| 536 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | u8 ata_chk_err(struct ata_port *ap) |
| 538 | { |
| 539 | if (ap->ops->check_err) |
| 540 | return ap->ops->check_err(ap); |
| 541 | |
| 542 | if (ap->flags & ATA_FLAG_MMIO) { |
| 543 | return readb((void __iomem *) ap->ioaddr.error_addr); |
| 544 | } |
| 545 | return inb(ap->ioaddr.error_addr); |
| 546 | } |
| 547 | |
| 548 | /** |
| 549 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 550 | * @tf: Taskfile to convert |
| 551 | * @fis: Buffer into which data will output |
| 552 | * @pmp: Port multiplier port |
| 553 | * |
| 554 | * Converts a standard ATA taskfile to a Serial ATA |
| 555 | * FIS structure (Register - Host to Device). |
| 556 | * |
| 557 | * LOCKING: |
| 558 | * Inherited from caller. |
| 559 | */ |
| 560 | |
| 561 | void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) |
| 562 | { |
| 563 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 564 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, |
| 565 | bit 7 indicates Command FIS */ |
| 566 | fis[2] = tf->command; |
| 567 | fis[3] = tf->feature; |
| 568 | |
| 569 | fis[4] = tf->lbal; |
| 570 | fis[5] = tf->lbam; |
| 571 | fis[6] = tf->lbah; |
| 572 | fis[7] = tf->device; |
| 573 | |
| 574 | fis[8] = tf->hob_lbal; |
| 575 | fis[9] = tf->hob_lbam; |
| 576 | fis[10] = tf->hob_lbah; |
| 577 | fis[11] = tf->hob_feature; |
| 578 | |
| 579 | fis[12] = tf->nsect; |
| 580 | fis[13] = tf->hob_nsect; |
| 581 | fis[14] = 0; |
| 582 | fis[15] = tf->ctl; |
| 583 | |
| 584 | fis[16] = 0; |
| 585 | fis[17] = 0; |
| 586 | fis[18] = 0; |
| 587 | fis[19] = 0; |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 592 | * @fis: Buffer from which data will be input |
| 593 | * @tf: Taskfile to output |
| 594 | * |
| 595 | * Converts a standard ATA taskfile to a Serial ATA |
| 596 | * FIS structure (Register - Host to Device). |
| 597 | * |
| 598 | * LOCKING: |
| 599 | * Inherited from caller. |
| 600 | */ |
| 601 | |
| 602 | void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf) |
| 603 | { |
| 604 | tf->command = fis[2]; /* status */ |
| 605 | tf->feature = fis[3]; /* error */ |
| 606 | |
| 607 | tf->lbal = fis[4]; |
| 608 | tf->lbam = fis[5]; |
| 609 | tf->lbah = fis[6]; |
| 610 | tf->device = fis[7]; |
| 611 | |
| 612 | tf->hob_lbal = fis[8]; |
| 613 | tf->hob_lbam = fis[9]; |
| 614 | tf->hob_lbah = fis[10]; |
| 615 | |
| 616 | tf->nsect = fis[12]; |
| 617 | tf->hob_nsect = fis[13]; |
| 618 | } |
| 619 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 620 | static const u8 ata_rw_cmds[] = { |
| 621 | /* pio multi */ |
| 622 | ATA_CMD_READ_MULTI, |
| 623 | ATA_CMD_WRITE_MULTI, |
| 624 | ATA_CMD_READ_MULTI_EXT, |
| 625 | ATA_CMD_WRITE_MULTI_EXT, |
| 626 | /* pio */ |
| 627 | ATA_CMD_PIO_READ, |
| 628 | ATA_CMD_PIO_WRITE, |
| 629 | ATA_CMD_PIO_READ_EXT, |
| 630 | ATA_CMD_PIO_WRITE_EXT, |
| 631 | /* dma */ |
| 632 | ATA_CMD_READ, |
| 633 | ATA_CMD_WRITE, |
| 634 | ATA_CMD_READ_EXT, |
| 635 | ATA_CMD_WRITE_EXT |
| 636 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | |
| 638 | /** |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 639 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
| 640 | * @qc: command to examine and configure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | * |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 642 | * Examine the device configuration and tf->flags to calculate |
| 643 | * the proper read/write commands and protocol to use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | * |
| 645 | * LOCKING: |
| 646 | * caller. |
| 647 | */ |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 648 | void ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 650 | struct ata_taskfile *tf = &qc->tf; |
| 651 | struct ata_device *dev = qc->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 653 | int index, lba48, write; |
| 654 | |
| 655 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| 656 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 658 | if (dev->flags & ATA_DFLAG_PIO) { |
| 659 | tf->protocol = ATA_PROT_PIO; |
| 660 | index = dev->multi_count ? 0 : 4; |
| 661 | } else { |
| 662 | tf->protocol = ATA_PROT_DMA; |
| 663 | index = 8; |
| 664 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 666 | tf->command = ata_rw_cmds[index + lba48 + write]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | |
| 669 | static const char * xfer_mode_str[] = { |
| 670 | "UDMA/16", |
| 671 | "UDMA/25", |
| 672 | "UDMA/33", |
| 673 | "UDMA/44", |
| 674 | "UDMA/66", |
| 675 | "UDMA/100", |
| 676 | "UDMA/133", |
| 677 | "UDMA7", |
| 678 | "MWDMA0", |
| 679 | "MWDMA1", |
| 680 | "MWDMA2", |
| 681 | "PIO0", |
| 682 | "PIO1", |
| 683 | "PIO2", |
| 684 | "PIO3", |
| 685 | "PIO4", |
| 686 | }; |
| 687 | |
| 688 | /** |
| 689 | * ata_udma_string - convert UDMA bit offset to string |
| 690 | * @mask: mask of bits supported; only highest bit counts. |
| 691 | * |
| 692 | * Determine string which represents the highest speed |
| 693 | * (highest bit in @udma_mask). |
| 694 | * |
| 695 | * LOCKING: |
| 696 | * None. |
| 697 | * |
| 698 | * RETURNS: |
| 699 | * Constant C string representing highest speed listed in |
| 700 | * @udma_mask, or the constant C string "<n/a>". |
| 701 | */ |
| 702 | |
| 703 | static const char *ata_mode_string(unsigned int mask) |
| 704 | { |
| 705 | int i; |
| 706 | |
| 707 | for (i = 7; i >= 0; i--) |
| 708 | if (mask & (1 << i)) |
| 709 | goto out; |
| 710 | for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--) |
| 711 | if (mask & (1 << i)) |
| 712 | goto out; |
| 713 | for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--) |
| 714 | if (mask & (1 << i)) |
| 715 | goto out; |
| 716 | |
| 717 | return "<n/a>"; |
| 718 | |
| 719 | out: |
| 720 | return xfer_mode_str[i]; |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * ata_pio_devchk - PATA device presence detection |
| 725 | * @ap: ATA channel to examine |
| 726 | * @device: Device to examine (starting at zero) |
| 727 | * |
| 728 | * This technique was originally described in |
| 729 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 730 | * later found its way into the ATA/ATAPI spec. |
| 731 | * |
| 732 | * Write a pattern to the ATA shadow registers, |
| 733 | * and if a device is present, it will respond by |
| 734 | * correctly storing and echoing back the |
| 735 | * ATA shadow register contents. |
| 736 | * |
| 737 | * LOCKING: |
| 738 | * caller. |
| 739 | */ |
| 740 | |
| 741 | static unsigned int ata_pio_devchk(struct ata_port *ap, |
| 742 | unsigned int device) |
| 743 | { |
| 744 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 745 | u8 nsect, lbal; |
| 746 | |
| 747 | ap->ops->dev_select(ap, device); |
| 748 | |
| 749 | outb(0x55, ioaddr->nsect_addr); |
| 750 | outb(0xaa, ioaddr->lbal_addr); |
| 751 | |
| 752 | outb(0xaa, ioaddr->nsect_addr); |
| 753 | outb(0x55, ioaddr->lbal_addr); |
| 754 | |
| 755 | outb(0x55, ioaddr->nsect_addr); |
| 756 | outb(0xaa, ioaddr->lbal_addr); |
| 757 | |
| 758 | nsect = inb(ioaddr->nsect_addr); |
| 759 | lbal = inb(ioaddr->lbal_addr); |
| 760 | |
| 761 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 762 | return 1; /* we found a device */ |
| 763 | |
| 764 | return 0; /* nothing found */ |
| 765 | } |
| 766 | |
| 767 | /** |
| 768 | * ata_mmio_devchk - PATA device presence detection |
| 769 | * @ap: ATA channel to examine |
| 770 | * @device: Device to examine (starting at zero) |
| 771 | * |
| 772 | * This technique was originally described in |
| 773 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 774 | * later found its way into the ATA/ATAPI spec. |
| 775 | * |
| 776 | * Write a pattern to the ATA shadow registers, |
| 777 | * and if a device is present, it will respond by |
| 778 | * correctly storing and echoing back the |
| 779 | * ATA shadow register contents. |
| 780 | * |
| 781 | * LOCKING: |
| 782 | * caller. |
| 783 | */ |
| 784 | |
| 785 | static unsigned int ata_mmio_devchk(struct ata_port *ap, |
| 786 | unsigned int device) |
| 787 | { |
| 788 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 789 | u8 nsect, lbal; |
| 790 | |
| 791 | ap->ops->dev_select(ap, device); |
| 792 | |
| 793 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 794 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 795 | |
| 796 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); |
| 797 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); |
| 798 | |
| 799 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 800 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 801 | |
| 802 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 803 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 804 | |
| 805 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 806 | return 1; /* we found a device */ |
| 807 | |
| 808 | return 0; /* nothing found */ |
| 809 | } |
| 810 | |
| 811 | /** |
| 812 | * ata_devchk - PATA device presence detection |
| 813 | * @ap: ATA channel to examine |
| 814 | * @device: Device to examine (starting at zero) |
| 815 | * |
| 816 | * Dispatch ATA device presence detection, depending |
| 817 | * on whether we are using PIO or MMIO to talk to the |
| 818 | * ATA shadow registers. |
| 819 | * |
| 820 | * LOCKING: |
| 821 | * caller. |
| 822 | */ |
| 823 | |
| 824 | static unsigned int ata_devchk(struct ata_port *ap, |
| 825 | unsigned int device) |
| 826 | { |
| 827 | if (ap->flags & ATA_FLAG_MMIO) |
| 828 | return ata_mmio_devchk(ap, device); |
| 829 | return ata_pio_devchk(ap, device); |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 834 | * @tf: ATA taskfile register set for device to be identified |
| 835 | * |
| 836 | * Determine from taskfile register contents whether a device is |
| 837 | * ATA or ATAPI, as per "Signature and persistence" section |
| 838 | * of ATA/PI spec (volume 1, sect 5.14). |
| 839 | * |
| 840 | * LOCKING: |
| 841 | * None. |
| 842 | * |
| 843 | * RETURNS: |
| 844 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN |
| 845 | * the event of failure. |
| 846 | */ |
| 847 | |
| 848 | unsigned int ata_dev_classify(struct ata_taskfile *tf) |
| 849 | { |
| 850 | /* Apple's open source Darwin code hints that some devices only |
| 851 | * put a proper signature into the LBA mid/high registers, |
| 852 | * So, we only check those. It's sufficient for uniqueness. |
| 853 | */ |
| 854 | |
| 855 | if (((tf->lbam == 0) && (tf->lbah == 0)) || |
| 856 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { |
| 857 | DPRINTK("found ATA device by sig\n"); |
| 858 | return ATA_DEV_ATA; |
| 859 | } |
| 860 | |
| 861 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || |
| 862 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { |
| 863 | DPRINTK("found ATAPI device by sig\n"); |
| 864 | return ATA_DEV_ATAPI; |
| 865 | } |
| 866 | |
| 867 | DPRINTK("unknown device\n"); |
| 868 | return ATA_DEV_UNKNOWN; |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * ata_dev_try_classify - Parse returned ATA device signature |
| 873 | * @ap: ATA channel to examine |
| 874 | * @device: Device to examine (starting at zero) |
| 875 | * |
| 876 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 877 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 878 | * shadow registers, indicating the results of device detection |
| 879 | * and diagnostics. |
| 880 | * |
| 881 | * Select the ATA device, and read the values from the ATA shadow |
| 882 | * registers. Then parse according to the Error register value, |
| 883 | * and the spec-defined values examined by ata_dev_classify(). |
| 884 | * |
| 885 | * LOCKING: |
| 886 | * caller. |
| 887 | */ |
| 888 | |
| 889 | static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device) |
| 890 | { |
| 891 | struct ata_device *dev = &ap->device[device]; |
| 892 | struct ata_taskfile tf; |
| 893 | unsigned int class; |
| 894 | u8 err; |
| 895 | |
| 896 | ap->ops->dev_select(ap, device); |
| 897 | |
| 898 | memset(&tf, 0, sizeof(tf)); |
| 899 | |
| 900 | err = ata_chk_err(ap); |
| 901 | ap->ops->tf_read(ap, &tf); |
| 902 | |
| 903 | dev->class = ATA_DEV_NONE; |
| 904 | |
| 905 | /* see if device passed diags */ |
| 906 | if (err == 1) |
| 907 | /* do nothing */ ; |
| 908 | else if ((device == 0) && (err == 0x81)) |
| 909 | /* do nothing */ ; |
| 910 | else |
| 911 | return err; |
| 912 | |
| 913 | /* determine if device if ATA or ATAPI */ |
| 914 | class = ata_dev_classify(&tf); |
| 915 | if (class == ATA_DEV_UNKNOWN) |
| 916 | return err; |
| 917 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
| 918 | return err; |
| 919 | |
| 920 | dev->class = class; |
| 921 | |
| 922 | return err; |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * ata_dev_id_string - Convert IDENTIFY DEVICE page into string |
| 927 | * @id: IDENTIFY DEVICE results we will examine |
| 928 | * @s: string into which data is output |
| 929 | * @ofs: offset into identify device page |
| 930 | * @len: length of string to return. must be an even number. |
| 931 | * |
| 932 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 933 | * 16-bit chunks. Run through the string, and output each |
| 934 | * 8-bit chunk linearly, regardless of platform. |
| 935 | * |
| 936 | * LOCKING: |
| 937 | * caller. |
| 938 | */ |
| 939 | |
| 940 | void ata_dev_id_string(u16 *id, unsigned char *s, |
| 941 | unsigned int ofs, unsigned int len) |
| 942 | { |
| 943 | unsigned int c; |
| 944 | |
| 945 | while (len > 0) { |
| 946 | c = id[ofs] >> 8; |
| 947 | *s = c; |
| 948 | s++; |
| 949 | |
| 950 | c = id[ofs] & 0xff; |
| 951 | *s = c; |
| 952 | s++; |
| 953 | |
| 954 | ofs++; |
| 955 | len -= 2; |
| 956 | } |
| 957 | } |
| 958 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 959 | |
| 960 | /** |
| 961 | * ata_noop_dev_select - Select device 0/1 on ATA bus |
| 962 | * @ap: ATA channel to manipulate |
| 963 | * @device: ATA device (numbered from zero) to select |
| 964 | * |
| 965 | * This function performs no actual function. |
| 966 | * |
| 967 | * May be used as the dev_select() entry in ata_port_operations. |
| 968 | * |
| 969 | * LOCKING: |
| 970 | * caller. |
| 971 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
| 973 | { |
| 974 | } |
| 975 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | /** |
| 978 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 979 | * @ap: ATA channel to manipulate |
| 980 | * @device: ATA device (numbered from zero) to select |
| 981 | * |
| 982 | * Use the method defined in the ATA specification to |
| 983 | * make either device 0, or device 1, active on the |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 984 | * ATA channel. Works with both PIO and MMIO. |
| 985 | * |
| 986 | * May be used as the dev_select() entry in ata_port_operations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | * |
| 988 | * LOCKING: |
| 989 | * caller. |
| 990 | */ |
| 991 | |
| 992 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) |
| 993 | { |
| 994 | u8 tmp; |
| 995 | |
| 996 | if (device == 0) |
| 997 | tmp = ATA_DEVICE_OBS; |
| 998 | else |
| 999 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 1000 | |
| 1001 | if (ap->flags & ATA_FLAG_MMIO) { |
| 1002 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); |
| 1003 | } else { |
| 1004 | outb(tmp, ap->ioaddr.device_addr); |
| 1005 | } |
| 1006 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 1007 | } |
| 1008 | |
| 1009 | /** |
| 1010 | * ata_dev_select - Select device 0/1 on ATA bus |
| 1011 | * @ap: ATA channel to manipulate |
| 1012 | * @device: ATA device (numbered from zero) to select |
| 1013 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 1014 | * @can_sleep: non-zero if context allows sleeping |
| 1015 | * |
| 1016 | * Use the method defined in the ATA specification to |
| 1017 | * make either device 0, or device 1, active on the |
| 1018 | * ATA channel. |
| 1019 | * |
| 1020 | * This is a high-level version of ata_std_dev_select(), |
| 1021 | * which additionally provides the services of inserting |
| 1022 | * the proper pauses and status polling, where needed. |
| 1023 | * |
| 1024 | * LOCKING: |
| 1025 | * caller. |
| 1026 | */ |
| 1027 | |
| 1028 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 1029 | unsigned int wait, unsigned int can_sleep) |
| 1030 | { |
| 1031 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", |
| 1032 | ap->id, device, wait); |
| 1033 | |
| 1034 | if (wait) |
| 1035 | ata_wait_idle(ap); |
| 1036 | |
| 1037 | ap->ops->dev_select(ap, device); |
| 1038 | |
| 1039 | if (wait) { |
| 1040 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) |
| 1041 | msleep(150); |
| 1042 | ata_wait_idle(ap); |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | /** |
| 1047 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
| 1048 | * @dev: Device whose IDENTIFY DEVICE page we will dump |
| 1049 | * |
| 1050 | * Dump selected 16-bit words from a detected device's |
| 1051 | * IDENTIFY PAGE page. |
| 1052 | * |
| 1053 | * LOCKING: |
| 1054 | * caller. |
| 1055 | */ |
| 1056 | |
| 1057 | static inline void ata_dump_id(struct ata_device *dev) |
| 1058 | { |
| 1059 | DPRINTK("49==0x%04x " |
| 1060 | "53==0x%04x " |
| 1061 | "63==0x%04x " |
| 1062 | "64==0x%04x " |
| 1063 | "75==0x%04x \n", |
| 1064 | dev->id[49], |
| 1065 | dev->id[53], |
| 1066 | dev->id[63], |
| 1067 | dev->id[64], |
| 1068 | dev->id[75]); |
| 1069 | DPRINTK("80==0x%04x " |
| 1070 | "81==0x%04x " |
| 1071 | "82==0x%04x " |
| 1072 | "83==0x%04x " |
| 1073 | "84==0x%04x \n", |
| 1074 | dev->id[80], |
| 1075 | dev->id[81], |
| 1076 | dev->id[82], |
| 1077 | dev->id[83], |
| 1078 | dev->id[84]); |
| 1079 | DPRINTK("88==0x%04x " |
| 1080 | "93==0x%04x\n", |
| 1081 | dev->id[88], |
| 1082 | dev->id[93]); |
| 1083 | } |
| 1084 | |
| 1085 | /** |
| 1086 | * ata_dev_identify - obtain IDENTIFY x DEVICE page |
| 1087 | * @ap: port on which device we wish to probe resides |
| 1088 | * @device: device bus address, starting at zero |
| 1089 | * |
| 1090 | * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE |
| 1091 | * command, and read back the 512-byte device information page. |
| 1092 | * The device information page is fed to us via the standard |
| 1093 | * PIO-IN protocol, but we hand-code it here. (TODO: investigate |
| 1094 | * using standard PIO-IN paths) |
| 1095 | * |
| 1096 | * After reading the device information page, we use several |
| 1097 | * bits of information from it to initialize data structures |
| 1098 | * that will be used during the lifetime of the ata_device. |
| 1099 | * Other data from the info page is used to disqualify certain |
| 1100 | * older ATA devices we do not wish to support. |
| 1101 | * |
| 1102 | * LOCKING: |
| 1103 | * Inherited from caller. Some functions called by this function |
| 1104 | * obtain the host_set lock. |
| 1105 | */ |
| 1106 | |
| 1107 | static void ata_dev_identify(struct ata_port *ap, unsigned int device) |
| 1108 | { |
| 1109 | struct ata_device *dev = &ap->device[device]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1110 | unsigned int major_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | u16 tmp; |
| 1112 | unsigned long xfer_modes; |
| 1113 | u8 status; |
| 1114 | unsigned int using_edd; |
| 1115 | DECLARE_COMPLETION(wait); |
| 1116 | struct ata_queued_cmd *qc; |
| 1117 | unsigned long flags; |
| 1118 | int rc; |
| 1119 | |
| 1120 | if (!ata_dev_present(dev)) { |
| 1121 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
| 1122 | ap->id, device); |
| 1123 | return; |
| 1124 | } |
| 1125 | |
| 1126 | if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET)) |
| 1127 | using_edd = 0; |
| 1128 | else |
| 1129 | using_edd = 1; |
| 1130 | |
| 1131 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, device); |
| 1132 | |
| 1133 | assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI || |
| 1134 | dev->class == ATA_DEV_NONE); |
| 1135 | |
| 1136 | ata_dev_select(ap, device, 1, 1); /* select device 0/1 */ |
| 1137 | |
| 1138 | qc = ata_qc_new_init(ap, dev); |
| 1139 | BUG_ON(qc == NULL); |
| 1140 | |
| 1141 | ata_sg_init_one(qc, dev->id, sizeof(dev->id)); |
| 1142 | qc->dma_dir = DMA_FROM_DEVICE; |
| 1143 | qc->tf.protocol = ATA_PROT_PIO; |
| 1144 | qc->nsect = 1; |
| 1145 | |
| 1146 | retry: |
| 1147 | if (dev->class == ATA_DEV_ATA) { |
| 1148 | qc->tf.command = ATA_CMD_ID_ATA; |
| 1149 | DPRINTK("do ATA identify\n"); |
| 1150 | } else { |
| 1151 | qc->tf.command = ATA_CMD_ID_ATAPI; |
| 1152 | DPRINTK("do ATAPI identify\n"); |
| 1153 | } |
| 1154 | |
| 1155 | qc->waiting = &wait; |
| 1156 | qc->complete_fn = ata_qc_complete_noop; |
| 1157 | |
| 1158 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 1159 | rc = ata_qc_issue(qc); |
| 1160 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 1161 | |
| 1162 | if (rc) |
| 1163 | goto err_out; |
| 1164 | else |
| 1165 | wait_for_completion(&wait); |
| 1166 | |
| 1167 | status = ata_chk_status(ap); |
| 1168 | if (status & ATA_ERR) { |
| 1169 | /* |
| 1170 | * arg! EDD works for all test cases, but seems to return |
| 1171 | * the ATA signature for some ATAPI devices. Until the |
| 1172 | * reason for this is found and fixed, we fix up the mess |
| 1173 | * here. If IDENTIFY DEVICE returns command aborted |
| 1174 | * (as ATAPI devices do), then we issue an |
| 1175 | * IDENTIFY PACKET DEVICE. |
| 1176 | * |
| 1177 | * ATA software reset (SRST, the default) does not appear |
| 1178 | * to have this problem. |
| 1179 | */ |
| 1180 | if ((using_edd) && (qc->tf.command == ATA_CMD_ID_ATA)) { |
| 1181 | u8 err = ata_chk_err(ap); |
| 1182 | if (err & ATA_ABORTED) { |
| 1183 | dev->class = ATA_DEV_ATAPI; |
| 1184 | qc->cursg = 0; |
| 1185 | qc->cursg_ofs = 0; |
| 1186 | qc->cursect = 0; |
| 1187 | qc->nsect = 1; |
| 1188 | goto retry; |
| 1189 | } |
| 1190 | } |
| 1191 | goto err_out; |
| 1192 | } |
| 1193 | |
| 1194 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
| 1195 | |
| 1196 | /* print device capabilities */ |
| 1197 | printk(KERN_DEBUG "ata%u: dev %u cfg " |
| 1198 | "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", |
| 1199 | ap->id, device, dev->id[49], |
| 1200 | dev->id[82], dev->id[83], dev->id[84], |
| 1201 | dev->id[85], dev->id[86], dev->id[87], |
| 1202 | dev->id[88]); |
| 1203 | |
| 1204 | /* |
| 1205 | * common ATA, ATAPI feature tests |
| 1206 | */ |
| 1207 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1208 | /* we require DMA support (bits 8 of word 49) */ |
| 1209 | if (!ata_id_has_dma(dev->id)) { |
| 1210 | printk(KERN_DEBUG "ata%u: no dma\n", ap->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | goto err_out_nosup; |
| 1212 | } |
| 1213 | |
| 1214 | /* quick-n-dirty find max transfer mode; for printk only */ |
| 1215 | xfer_modes = dev->id[ATA_ID_UDMA_MODES]; |
| 1216 | if (!xfer_modes) |
| 1217 | xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA; |
| 1218 | if (!xfer_modes) { |
| 1219 | xfer_modes = (dev->id[ATA_ID_PIO_MODES]) << (ATA_SHIFT_PIO + 3); |
| 1220 | xfer_modes |= (0x7 << ATA_SHIFT_PIO); |
| 1221 | } |
| 1222 | |
| 1223 | ata_dump_id(dev); |
| 1224 | |
| 1225 | /* ATA-specific feature tests */ |
| 1226 | if (dev->class == ATA_DEV_ATA) { |
| 1227 | if (!ata_id_is_ata(dev->id)) /* sanity check */ |
| 1228 | goto err_out_nosup; |
| 1229 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1230 | /* get major version */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | tmp = dev->id[ATA_ID_MAJOR_VER]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1232 | for (major_version = 14; major_version >= 1; major_version--) |
| 1233 | if (tmp & (1 << major_version)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | break; |
| 1235 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1236 | /* |
| 1237 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 1238 | * SRST RESET |
| 1239 | * IDENTIFY |
| 1240 | * INITIALIZE DEVICE PARAMETERS |
| 1241 | * anything else.. |
| 1242 | * Some drives were very specific about that exact sequence. |
| 1243 | */ |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame^] | 1244 | if (major_version < 4 || (!ata_id_has_lba(dev->id))) { |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1245 | ata_dev_init_params(ap, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame^] | 1247 | /* current CHS translation info (id[53-58]) might be |
| 1248 | * changed. reread the identify device info. |
| 1249 | */ |
| 1250 | ata_dev_reread_id(ap, dev); |
| 1251 | } |
| 1252 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1253 | if (ata_id_has_lba(dev->id)) { |
| 1254 | dev->flags |= ATA_DFLAG_LBA; |
| 1255 | |
| 1256 | if (ata_id_has_lba48(dev->id)) { |
| 1257 | dev->flags |= ATA_DFLAG_LBA48; |
| 1258 | dev->n_sectors = ata_id_u64(dev->id, 100); |
| 1259 | } else { |
| 1260 | dev->n_sectors = ata_id_u32(dev->id, 60); |
| 1261 | } |
| 1262 | |
| 1263 | /* print device info to dmesg */ |
| 1264 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n", |
| 1265 | ap->id, device, |
| 1266 | major_version, |
| 1267 | ata_mode_string(xfer_modes), |
| 1268 | (unsigned long long)dev->n_sectors, |
| 1269 | dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA"); |
| 1270 | } else { |
| 1271 | /* CHS */ |
| 1272 | |
| 1273 | /* Default translation */ |
| 1274 | dev->cylinders = dev->id[1]; |
| 1275 | dev->heads = dev->id[3]; |
| 1276 | dev->sectors = dev->id[6]; |
| 1277 | dev->n_sectors = dev->cylinders * dev->heads * dev->sectors; |
| 1278 | |
| 1279 | if (ata_id_current_chs_valid(dev->id)) { |
| 1280 | /* Current CHS translation is valid. */ |
| 1281 | dev->cylinders = dev->id[54]; |
| 1282 | dev->heads = dev->id[55]; |
| 1283 | dev->sectors = dev->id[56]; |
| 1284 | |
| 1285 | dev->n_sectors = ata_id_u32(dev->id, 57); |
| 1286 | } |
| 1287 | |
| 1288 | /* print device info to dmesg */ |
| 1289 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n", |
| 1290 | ap->id, device, |
| 1291 | major_version, |
| 1292 | ata_mode_string(xfer_modes), |
| 1293 | (unsigned long long)dev->n_sectors, |
| 1294 | (int)dev->cylinders, (int)dev->heads, (int)dev->sectors); |
| 1295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | ap->host->max_cmd_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | /* ATAPI-specific feature tests */ |
| 1302 | else { |
| 1303 | if (ata_id_is_ata(dev->id)) /* sanity check */ |
| 1304 | goto err_out_nosup; |
| 1305 | |
| 1306 | rc = atapi_cdb_len(dev->id); |
| 1307 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
| 1308 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); |
| 1309 | goto err_out_nosup; |
| 1310 | } |
| 1311 | ap->cdb_len = (unsigned int) rc; |
| 1312 | ap->host->max_cmd_len = (unsigned char) ap->cdb_len; |
| 1313 | |
| 1314 | /* print device info to dmesg */ |
| 1315 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", |
| 1316 | ap->id, device, |
| 1317 | ata_mode_string(xfer_modes)); |
| 1318 | } |
| 1319 | |
| 1320 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
| 1321 | return; |
| 1322 | |
| 1323 | err_out_nosup: |
| 1324 | printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n", |
| 1325 | ap->id, device); |
| 1326 | err_out: |
| 1327 | dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */ |
| 1328 | DPRINTK("EXIT, err\n"); |
| 1329 | } |
| 1330 | |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1331 | |
| 1332 | static inline u8 ata_dev_knobble(struct ata_port *ap) |
| 1333 | { |
| 1334 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id))); |
| 1335 | } |
| 1336 | |
| 1337 | /** |
| 1338 | * ata_dev_config - Run device specific handlers and check for |
| 1339 | * SATA->PATA bridges |
Jeff Garzik | 8a60a07 | 2005-07-31 13:13:24 -0400 | [diff] [blame] | 1340 | * @ap: Bus |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1341 | * @i: Device |
| 1342 | * |
| 1343 | * LOCKING: |
| 1344 | */ |
Jeff Garzik | 8a60a07 | 2005-07-31 13:13:24 -0400 | [diff] [blame] | 1345 | |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1346 | void ata_dev_config(struct ata_port *ap, unsigned int i) |
| 1347 | { |
| 1348 | /* limit bridge transfers to udma5, 200 sectors */ |
| 1349 | if (ata_dev_knobble(ap)) { |
| 1350 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", |
| 1351 | ap->id, ap->device->devno); |
| 1352 | ap->udma_mask &= ATA_UDMA5; |
| 1353 | ap->host->max_sectors = ATA_MAX_SECTORS; |
| 1354 | ap->host->hostt->max_sectors = ATA_MAX_SECTORS; |
| 1355 | ap->device->flags |= ATA_DFLAG_LOCK_SECTORS; |
| 1356 | } |
| 1357 | |
| 1358 | if (ap->ops->dev_config) |
| 1359 | ap->ops->dev_config(ap, &ap->device[i]); |
| 1360 | } |
| 1361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | /** |
| 1363 | * ata_bus_probe - Reset and probe ATA bus |
| 1364 | * @ap: Bus to probe |
| 1365 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1366 | * Master ATA bus probing function. Initiates a hardware-dependent |
| 1367 | * bus reset, then attempts to identify any devices found on |
| 1368 | * the bus. |
| 1369 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1371 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | * |
| 1373 | * RETURNS: |
| 1374 | * Zero on success, non-zero on error. |
| 1375 | */ |
| 1376 | |
| 1377 | static int ata_bus_probe(struct ata_port *ap) |
| 1378 | { |
| 1379 | unsigned int i, found = 0; |
| 1380 | |
| 1381 | ap->ops->phy_reset(ap); |
| 1382 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1383 | goto err_out; |
| 1384 | |
| 1385 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1386 | ata_dev_identify(ap, i); |
| 1387 | if (ata_dev_present(&ap->device[i])) { |
| 1388 | found = 1; |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1389 | ata_dev_config(ap,i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1394 | goto err_out_disable; |
| 1395 | |
| 1396 | ata_set_mode(ap); |
| 1397 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1398 | goto err_out_disable; |
| 1399 | |
| 1400 | return 0; |
| 1401 | |
| 1402 | err_out_disable: |
| 1403 | ap->ops->port_disable(ap); |
| 1404 | err_out: |
| 1405 | return -1; |
| 1406 | } |
| 1407 | |
| 1408 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1409 | * ata_port_probe - Mark port as enabled |
| 1410 | * @ap: Port for which we indicate enablement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1412 | * Modify @ap data structure such that the system |
| 1413 | * thinks that the entire port is enabled. |
| 1414 | * |
| 1415 | * LOCKING: host_set lock, or some other form of |
| 1416 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | */ |
| 1418 | |
| 1419 | void ata_port_probe(struct ata_port *ap) |
| 1420 | { |
| 1421 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; |
| 1422 | } |
| 1423 | |
| 1424 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1425 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
| 1426 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1428 | * This function issues commands to standard SATA Sxxx |
| 1429 | * PHY registers, to wake up the phy (and device), and |
| 1430 | * clear any reset condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | * |
| 1432 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1433 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | * |
| 1435 | */ |
| 1436 | void __sata_phy_reset(struct ata_port *ap) |
| 1437 | { |
| 1438 | u32 sstatus; |
| 1439 | unsigned long timeout = jiffies + (HZ * 5); |
| 1440 | |
| 1441 | if (ap->flags & ATA_FLAG_SATA_RESET) { |
Brett Russ | cdcca89 | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 1442 | /* issue phy wake/reset */ |
| 1443 | scr_write_flush(ap, SCR_CONTROL, 0x301); |
Tejun Heo | 62ba284 | 2005-06-26 23:27:19 +0900 | [diff] [blame] | 1444 | /* Couldn't find anything in SATA I/II specs, but |
| 1445 | * AHCI-1.1 10.4.2 says at least 1 ms. */ |
| 1446 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | } |
Brett Russ | cdcca89 | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 1448 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | |
| 1450 | /* wait for phy to become ready, if necessary */ |
| 1451 | do { |
| 1452 | msleep(200); |
| 1453 | sstatus = scr_read(ap, SCR_STATUS); |
| 1454 | if ((sstatus & 0xf) != 1) |
| 1455 | break; |
| 1456 | } while (time_before(jiffies, timeout)); |
| 1457 | |
| 1458 | /* TODO: phy layer with polling, timeouts, etc. */ |
| 1459 | if (sata_dev_present(ap)) |
| 1460 | ata_port_probe(ap); |
| 1461 | else { |
| 1462 | sstatus = scr_read(ap, SCR_STATUS); |
| 1463 | printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n", |
| 1464 | ap->id, sstatus); |
| 1465 | ata_port_disable(ap); |
| 1466 | } |
| 1467 | |
| 1468 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1469 | return; |
| 1470 | |
| 1471 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
| 1472 | ata_port_disable(ap); |
| 1473 | return; |
| 1474 | } |
| 1475 | |
| 1476 | ap->cbl = ATA_CBL_SATA; |
| 1477 | } |
| 1478 | |
| 1479 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1480 | * sata_phy_reset - Reset SATA bus. |
| 1481 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1483 | * This function resets the SATA bus, and then probes |
| 1484 | * the bus for devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | * |
| 1486 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1487 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | * |
| 1489 | */ |
| 1490 | void sata_phy_reset(struct ata_port *ap) |
| 1491 | { |
| 1492 | __sata_phy_reset(ap); |
| 1493 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1494 | return; |
| 1495 | ata_bus_reset(ap); |
| 1496 | } |
| 1497 | |
| 1498 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1499 | * ata_port_disable - Disable port. |
| 1500 | * @ap: Port to be disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1502 | * Modify @ap data structure such that the system |
| 1503 | * thinks that the entire port is disabled, and should |
| 1504 | * never attempt to probe or communicate with devices |
| 1505 | * on this port. |
| 1506 | * |
| 1507 | * LOCKING: host_set lock, or some other form of |
| 1508 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | */ |
| 1510 | |
| 1511 | void ata_port_disable(struct ata_port *ap) |
| 1512 | { |
| 1513 | ap->device[0].class = ATA_DEV_NONE; |
| 1514 | ap->device[1].class = ATA_DEV_NONE; |
| 1515 | ap->flags |= ATA_FLAG_PORT_DISABLED; |
| 1516 | } |
| 1517 | |
| 1518 | static struct { |
| 1519 | unsigned int shift; |
| 1520 | u8 base; |
| 1521 | } xfer_mode_classes[] = { |
| 1522 | { ATA_SHIFT_UDMA, XFER_UDMA_0 }, |
| 1523 | { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 }, |
| 1524 | { ATA_SHIFT_PIO, XFER_PIO_0 }, |
| 1525 | }; |
| 1526 | |
| 1527 | static inline u8 base_from_shift(unsigned int shift) |
| 1528 | { |
| 1529 | int i; |
| 1530 | |
| 1531 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) |
| 1532 | if (xfer_mode_classes[i].shift == shift) |
| 1533 | return xfer_mode_classes[i].base; |
| 1534 | |
| 1535 | return 0xff; |
| 1536 | } |
| 1537 | |
| 1538 | static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
| 1539 | { |
| 1540 | int ofs, idx; |
| 1541 | u8 base; |
| 1542 | |
| 1543 | if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1544 | return; |
| 1545 | |
| 1546 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 1547 | dev->flags |= ATA_DFLAG_PIO; |
| 1548 | |
| 1549 | ata_dev_set_xfermode(ap, dev); |
| 1550 | |
| 1551 | base = base_from_shift(dev->xfer_shift); |
| 1552 | ofs = dev->xfer_mode - base; |
| 1553 | idx = ofs + dev->xfer_shift; |
| 1554 | WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str)); |
| 1555 | |
| 1556 | DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n", |
| 1557 | idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs); |
| 1558 | |
| 1559 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", |
| 1560 | ap->id, dev->devno, xfer_mode_str[idx]); |
| 1561 | } |
| 1562 | |
| 1563 | static int ata_host_set_pio(struct ata_port *ap) |
| 1564 | { |
| 1565 | unsigned int mask; |
| 1566 | int x, i; |
| 1567 | u8 base, xfer_mode; |
| 1568 | |
| 1569 | mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO); |
| 1570 | x = fgb(mask); |
| 1571 | if (x < 0) { |
| 1572 | printk(KERN_WARNING "ata%u: no PIO support\n", ap->id); |
| 1573 | return -1; |
| 1574 | } |
| 1575 | |
| 1576 | base = base_from_shift(ATA_SHIFT_PIO); |
| 1577 | xfer_mode = base + x; |
| 1578 | |
| 1579 | DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n", |
| 1580 | (int)base, (int)xfer_mode, mask, x); |
| 1581 | |
| 1582 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1583 | struct ata_device *dev = &ap->device[i]; |
| 1584 | if (ata_dev_present(dev)) { |
| 1585 | dev->pio_mode = xfer_mode; |
| 1586 | dev->xfer_mode = xfer_mode; |
| 1587 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 1588 | if (ap->ops->set_piomode) |
| 1589 | ap->ops->set_piomode(ap, dev); |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | return 0; |
| 1594 | } |
| 1595 | |
| 1596 | static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode, |
| 1597 | unsigned int xfer_shift) |
| 1598 | { |
| 1599 | int i; |
| 1600 | |
| 1601 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1602 | struct ata_device *dev = &ap->device[i]; |
| 1603 | if (ata_dev_present(dev)) { |
| 1604 | dev->dma_mode = xfer_mode; |
| 1605 | dev->xfer_mode = xfer_mode; |
| 1606 | dev->xfer_shift = xfer_shift; |
| 1607 | if (ap->ops->set_dmamode) |
| 1608 | ap->ops->set_dmamode(ap, dev); |
| 1609 | } |
| 1610 | } |
| 1611 | } |
| 1612 | |
| 1613 | /** |
| 1614 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 1615 | * @ap: port on which timings will be programmed |
| 1616 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1617 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). |
| 1618 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1620 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | * |
| 1622 | */ |
| 1623 | static void ata_set_mode(struct ata_port *ap) |
| 1624 | { |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 1625 | unsigned int xfer_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | u8 xfer_mode; |
| 1627 | int rc; |
| 1628 | |
| 1629 | /* step 1: always set host PIO timings */ |
| 1630 | rc = ata_host_set_pio(ap); |
| 1631 | if (rc) |
| 1632 | goto err_out; |
| 1633 | |
| 1634 | /* step 2: choose the best data xfer mode */ |
| 1635 | xfer_mode = xfer_shift = 0; |
| 1636 | rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift); |
| 1637 | if (rc) |
| 1638 | goto err_out; |
| 1639 | |
| 1640 | /* step 3: if that xfer mode isn't PIO, set host DMA timings */ |
| 1641 | if (xfer_shift != ATA_SHIFT_PIO) |
| 1642 | ata_host_set_dma(ap, xfer_mode, xfer_shift); |
| 1643 | |
| 1644 | /* step 4: update devices' xfer mode */ |
| 1645 | ata_dev_set_mode(ap, &ap->device[0]); |
| 1646 | ata_dev_set_mode(ap, &ap->device[1]); |
| 1647 | |
| 1648 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1649 | return; |
| 1650 | |
| 1651 | if (ap->ops->post_set_mode) |
| 1652 | ap->ops->post_set_mode(ap); |
| 1653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | return; |
| 1655 | |
| 1656 | err_out: |
| 1657 | ata_port_disable(ap); |
| 1658 | } |
| 1659 | |
| 1660 | /** |
| 1661 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 1662 | * @ap: port containing status register to be polled |
| 1663 | * @tmout_pat: impatience timeout |
| 1664 | * @tmout: overall timeout |
| 1665 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1666 | * Sleep until ATA Status register bit BSY clears, |
| 1667 | * or a timeout occurs. |
| 1668 | * |
| 1669 | * LOCKING: None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | * |
| 1671 | */ |
| 1672 | |
| 1673 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 1674 | unsigned long tmout_pat, |
| 1675 | unsigned long tmout) |
| 1676 | { |
| 1677 | unsigned long timer_start, timeout; |
| 1678 | u8 status; |
| 1679 | |
| 1680 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 1681 | timer_start = jiffies; |
| 1682 | timeout = timer_start + tmout_pat; |
| 1683 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1684 | msleep(50); |
| 1685 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 1686 | } |
| 1687 | |
| 1688 | if (status & ATA_BUSY) |
| 1689 | printk(KERN_WARNING "ata%u is slow to respond, " |
| 1690 | "please be patient\n", ap->id); |
| 1691 | |
| 1692 | timeout = timer_start + tmout; |
| 1693 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1694 | msleep(50); |
| 1695 | status = ata_chk_status(ap); |
| 1696 | } |
| 1697 | |
| 1698 | if (status & ATA_BUSY) { |
| 1699 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", |
| 1700 | ap->id, tmout / HZ); |
| 1701 | return 1; |
| 1702 | } |
| 1703 | |
| 1704 | return 0; |
| 1705 | } |
| 1706 | |
| 1707 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) |
| 1708 | { |
| 1709 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1710 | unsigned int dev0 = devmask & (1 << 0); |
| 1711 | unsigned int dev1 = devmask & (1 << 1); |
| 1712 | unsigned long timeout; |
| 1713 | |
| 1714 | /* if device 0 was found in ata_devchk, wait for its |
| 1715 | * BSY bit to clear |
| 1716 | */ |
| 1717 | if (dev0) |
| 1718 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1719 | |
| 1720 | /* if device 1 was found in ata_devchk, wait for |
| 1721 | * register access, then wait for BSY to clear |
| 1722 | */ |
| 1723 | timeout = jiffies + ATA_TMOUT_BOOT; |
| 1724 | while (dev1) { |
| 1725 | u8 nsect, lbal; |
| 1726 | |
| 1727 | ap->ops->dev_select(ap, 1); |
| 1728 | if (ap->flags & ATA_FLAG_MMIO) { |
| 1729 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 1730 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 1731 | } else { |
| 1732 | nsect = inb(ioaddr->nsect_addr); |
| 1733 | lbal = inb(ioaddr->lbal_addr); |
| 1734 | } |
| 1735 | if ((nsect == 1) && (lbal == 1)) |
| 1736 | break; |
| 1737 | if (time_after(jiffies, timeout)) { |
| 1738 | dev1 = 0; |
| 1739 | break; |
| 1740 | } |
| 1741 | msleep(50); /* give drive a breather */ |
| 1742 | } |
| 1743 | if (dev1) |
| 1744 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1745 | |
| 1746 | /* is all this really necessary? */ |
| 1747 | ap->ops->dev_select(ap, 0); |
| 1748 | if (dev1) |
| 1749 | ap->ops->dev_select(ap, 1); |
| 1750 | if (dev0) |
| 1751 | ap->ops->dev_select(ap, 0); |
| 1752 | } |
| 1753 | |
| 1754 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1755 | * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command. |
| 1756 | * @ap: Port to reset and probe |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1758 | * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and |
| 1759 | * probe the bus. Not often used these days. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | * |
| 1761 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1762 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | * |
| 1764 | */ |
| 1765 | |
| 1766 | static unsigned int ata_bus_edd(struct ata_port *ap) |
| 1767 | { |
| 1768 | struct ata_taskfile tf; |
| 1769 | |
| 1770 | /* set up execute-device-diag (bus reset) taskfile */ |
| 1771 | /* also, take interrupts to a known state (disabled) */ |
| 1772 | DPRINTK("execute-device-diag\n"); |
| 1773 | ata_tf_init(ap, &tf, 0); |
| 1774 | tf.ctl |= ATA_NIEN; |
| 1775 | tf.command = ATA_CMD_EDD; |
| 1776 | tf.protocol = ATA_PROT_NODATA; |
| 1777 | |
| 1778 | /* do bus reset */ |
| 1779 | ata_tf_to_host(ap, &tf); |
| 1780 | |
| 1781 | /* spec says at least 2ms. but who knows with those |
| 1782 | * crazy ATAPI devices... |
| 1783 | */ |
| 1784 | msleep(150); |
| 1785 | |
| 1786 | return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 1787 | } |
| 1788 | |
| 1789 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
| 1790 | unsigned int devmask) |
| 1791 | { |
| 1792 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1793 | |
| 1794 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); |
| 1795 | |
| 1796 | /* software reset. causes dev0 to be selected */ |
| 1797 | if (ap->flags & ATA_FLAG_MMIO) { |
| 1798 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1799 | udelay(20); /* FIXME: flush */ |
| 1800 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); |
| 1801 | udelay(20); /* FIXME: flush */ |
| 1802 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1803 | } else { |
| 1804 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1805 | udelay(10); |
| 1806 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 1807 | udelay(10); |
| 1808 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1809 | } |
| 1810 | |
| 1811 | /* spec mandates ">= 2ms" before checking status. |
| 1812 | * We wait 150ms, because that was the magic delay used for |
| 1813 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 1814 | * between when the ATA command register is written, and then |
| 1815 | * status is checked. Because waiting for "a while" before |
| 1816 | * checking status is fine, post SRST, we perform this magic |
| 1817 | * delay here as well. |
| 1818 | */ |
| 1819 | msleep(150); |
| 1820 | |
| 1821 | ata_bus_post_reset(ap, devmask); |
| 1822 | |
| 1823 | return 0; |
| 1824 | } |
| 1825 | |
| 1826 | /** |
| 1827 | * ata_bus_reset - reset host port and associated ATA channel |
| 1828 | * @ap: port to reset |
| 1829 | * |
| 1830 | * This is typically the first time we actually start issuing |
| 1831 | * commands to the ATA channel. We wait for BSY to clear, then |
| 1832 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 1833 | * result. Determine what devices, if any, are on the channel |
| 1834 | * by looking at the device 0/1 error register. Look at the signature |
| 1835 | * stored in each device's taskfile registers, to determine if |
| 1836 | * the device is ATA or ATAPI. |
| 1837 | * |
| 1838 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1839 | * PCI/etc. bus probe sem. |
| 1840 | * Obtains host_set lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | * |
| 1842 | * SIDE EFFECTS: |
| 1843 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. |
| 1844 | */ |
| 1845 | |
| 1846 | void ata_bus_reset(struct ata_port *ap) |
| 1847 | { |
| 1848 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1849 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 1850 | u8 err; |
| 1851 | unsigned int dev0, dev1 = 0, rc = 0, devmask = 0; |
| 1852 | |
| 1853 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); |
| 1854 | |
| 1855 | /* determine if device 0/1 are present */ |
| 1856 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 1857 | dev0 = 1; |
| 1858 | else { |
| 1859 | dev0 = ata_devchk(ap, 0); |
| 1860 | if (slave_possible) |
| 1861 | dev1 = ata_devchk(ap, 1); |
| 1862 | } |
| 1863 | |
| 1864 | if (dev0) |
| 1865 | devmask |= (1 << 0); |
| 1866 | if (dev1) |
| 1867 | devmask |= (1 << 1); |
| 1868 | |
| 1869 | /* select device 0 again */ |
| 1870 | ap->ops->dev_select(ap, 0); |
| 1871 | |
| 1872 | /* issue bus reset */ |
| 1873 | if (ap->flags & ATA_FLAG_SRST) |
| 1874 | rc = ata_bus_softreset(ap, devmask); |
| 1875 | else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) { |
| 1876 | /* set up device control */ |
| 1877 | if (ap->flags & ATA_FLAG_MMIO) |
| 1878 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1879 | else |
| 1880 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1881 | rc = ata_bus_edd(ap); |
| 1882 | } |
| 1883 | |
| 1884 | if (rc) |
| 1885 | goto err_out; |
| 1886 | |
| 1887 | /* |
| 1888 | * determine by signature whether we have ATA or ATAPI devices |
| 1889 | */ |
| 1890 | err = ata_dev_try_classify(ap, 0); |
| 1891 | if ((slave_possible) && (err != 0x81)) |
| 1892 | ata_dev_try_classify(ap, 1); |
| 1893 | |
| 1894 | /* re-enable interrupts */ |
| 1895 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ |
| 1896 | ata_irq_on(ap); |
| 1897 | |
| 1898 | /* is double-select really necessary? */ |
| 1899 | if (ap->device[1].class != ATA_DEV_NONE) |
| 1900 | ap->ops->dev_select(ap, 1); |
| 1901 | if (ap->device[0].class != ATA_DEV_NONE) |
| 1902 | ap->ops->dev_select(ap, 0); |
| 1903 | |
| 1904 | /* if no devices were detected, disable this port */ |
| 1905 | if ((ap->device[0].class == ATA_DEV_NONE) && |
| 1906 | (ap->device[1].class == ATA_DEV_NONE)) |
| 1907 | goto err_out; |
| 1908 | |
| 1909 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 1910 | /* set up device control for ATA_FLAG_SATA_RESET */ |
| 1911 | if (ap->flags & ATA_FLAG_MMIO) |
| 1912 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 1913 | else |
| 1914 | outb(ap->ctl, ioaddr->ctl_addr); |
| 1915 | } |
| 1916 | |
| 1917 | DPRINTK("EXIT\n"); |
| 1918 | return; |
| 1919 | |
| 1920 | err_out: |
| 1921 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); |
| 1922 | ap->ops->port_disable(ap); |
| 1923 | |
| 1924 | DPRINTK("EXIT\n"); |
| 1925 | } |
| 1926 | |
| 1927 | static void ata_pr_blacklisted(struct ata_port *ap, struct ata_device *dev) |
| 1928 | { |
| 1929 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", |
| 1930 | ap->id, dev->devno); |
| 1931 | } |
| 1932 | |
| 1933 | static const char * ata_dma_blacklist [] = { |
| 1934 | "WDC AC11000H", |
| 1935 | "WDC AC22100H", |
| 1936 | "WDC AC32500H", |
| 1937 | "WDC AC33100H", |
| 1938 | "WDC AC31600H", |
| 1939 | "WDC AC32100H", |
| 1940 | "WDC AC23200L", |
| 1941 | "Compaq CRD-8241B", |
| 1942 | "CRD-8400B", |
| 1943 | "CRD-8480B", |
| 1944 | "CRD-8482B", |
| 1945 | "CRD-84", |
| 1946 | "SanDisk SDP3B", |
| 1947 | "SanDisk SDP3B-64", |
| 1948 | "SANYO CD-ROM CRD", |
| 1949 | "HITACHI CDR-8", |
| 1950 | "HITACHI CDR-8335", |
| 1951 | "HITACHI CDR-8435", |
| 1952 | "Toshiba CD-ROM XM-6202B", |
Jeff Garzik | e922256 | 2005-06-28 00:03:37 -0400 | [diff] [blame] | 1953 | "TOSHIBA CD-ROM XM-1702BC", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | "CD-532E-A", |
| 1955 | "E-IDE CD-ROM CR-840", |
| 1956 | "CD-ROM Drive/F5A", |
| 1957 | "WPI CDD-820", |
| 1958 | "SAMSUNG CD-ROM SC-148C", |
| 1959 | "SAMSUNG CD-ROM SC", |
| 1960 | "SanDisk SDP3B-64", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | "ATAPI CD-ROM DRIVE 40X MAXIMUM", |
| 1962 | "_NEC DV5800A", |
| 1963 | }; |
| 1964 | |
| 1965 | static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) |
| 1966 | { |
| 1967 | unsigned char model_num[40]; |
| 1968 | char *s; |
| 1969 | unsigned int len; |
| 1970 | int i; |
| 1971 | |
| 1972 | ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
| 1973 | sizeof(model_num)); |
| 1974 | s = &model_num[0]; |
| 1975 | len = strnlen(s, sizeof(model_num)); |
| 1976 | |
| 1977 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ |
| 1978 | while ((len > 0) && (s[len - 1] == ' ')) { |
| 1979 | len--; |
| 1980 | s[len] = 0; |
| 1981 | } |
| 1982 | |
| 1983 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++) |
| 1984 | if (!strncmp(ata_dma_blacklist[i], s, len)) |
| 1985 | return 1; |
| 1986 | |
| 1987 | return 0; |
| 1988 | } |
| 1989 | |
| 1990 | static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) |
| 1991 | { |
| 1992 | struct ata_device *master, *slave; |
| 1993 | unsigned int mask; |
| 1994 | |
| 1995 | master = &ap->device[0]; |
| 1996 | slave = &ap->device[1]; |
| 1997 | |
| 1998 | assert (ata_dev_present(master) || ata_dev_present(slave)); |
| 1999 | |
| 2000 | if (shift == ATA_SHIFT_UDMA) { |
| 2001 | mask = ap->udma_mask; |
| 2002 | if (ata_dev_present(master)) { |
| 2003 | mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); |
| 2004 | if (ata_dma_blacklisted(ap, master)) { |
| 2005 | mask = 0; |
| 2006 | ata_pr_blacklisted(ap, master); |
| 2007 | } |
| 2008 | } |
| 2009 | if (ata_dev_present(slave)) { |
| 2010 | mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); |
| 2011 | if (ata_dma_blacklisted(ap, slave)) { |
| 2012 | mask = 0; |
| 2013 | ata_pr_blacklisted(ap, slave); |
| 2014 | } |
| 2015 | } |
| 2016 | } |
| 2017 | else if (shift == ATA_SHIFT_MWDMA) { |
| 2018 | mask = ap->mwdma_mask; |
| 2019 | if (ata_dev_present(master)) { |
| 2020 | mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); |
| 2021 | if (ata_dma_blacklisted(ap, master)) { |
| 2022 | mask = 0; |
| 2023 | ata_pr_blacklisted(ap, master); |
| 2024 | } |
| 2025 | } |
| 2026 | if (ata_dev_present(slave)) { |
| 2027 | mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); |
| 2028 | if (ata_dma_blacklisted(ap, slave)) { |
| 2029 | mask = 0; |
| 2030 | ata_pr_blacklisted(ap, slave); |
| 2031 | } |
| 2032 | } |
| 2033 | } |
| 2034 | else if (shift == ATA_SHIFT_PIO) { |
| 2035 | mask = ap->pio_mask; |
| 2036 | if (ata_dev_present(master)) { |
| 2037 | /* spec doesn't return explicit support for |
| 2038 | * PIO0-2, so we fake it |
| 2039 | */ |
| 2040 | u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03; |
| 2041 | tmp_mode <<= 3; |
| 2042 | tmp_mode |= 0x7; |
| 2043 | mask &= tmp_mode; |
| 2044 | } |
| 2045 | if (ata_dev_present(slave)) { |
| 2046 | /* spec doesn't return explicit support for |
| 2047 | * PIO0-2, so we fake it |
| 2048 | */ |
| 2049 | u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03; |
| 2050 | tmp_mode <<= 3; |
| 2051 | tmp_mode |= 0x7; |
| 2052 | mask &= tmp_mode; |
| 2053 | } |
| 2054 | } |
| 2055 | else { |
| 2056 | mask = 0xffffffff; /* shut up compiler warning */ |
| 2057 | BUG(); |
| 2058 | } |
| 2059 | |
| 2060 | return mask; |
| 2061 | } |
| 2062 | |
| 2063 | /* find greatest bit */ |
| 2064 | static int fgb(u32 bitmap) |
| 2065 | { |
| 2066 | unsigned int i; |
| 2067 | int x = -1; |
| 2068 | |
| 2069 | for (i = 0; i < 32; i++) |
| 2070 | if (bitmap & (1 << i)) |
| 2071 | x = i; |
| 2072 | |
| 2073 | return x; |
| 2074 | } |
| 2075 | |
| 2076 | /** |
| 2077 | * ata_choose_xfer_mode - attempt to find best transfer mode |
| 2078 | * @ap: Port for which an xfer mode will be selected |
| 2079 | * @xfer_mode_out: (output) SET FEATURES - XFER MODE code |
| 2080 | * @xfer_shift_out: (output) bit shift that selects this mode |
| 2081 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2082 | * Based on host and device capabilities, determine the |
| 2083 | * maximum transfer mode that is amenable to all. |
| 2084 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2086 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | * |
| 2088 | * RETURNS: |
| 2089 | * Zero on success, negative on error. |
| 2090 | */ |
| 2091 | |
| 2092 | static int ata_choose_xfer_mode(struct ata_port *ap, |
| 2093 | u8 *xfer_mode_out, |
| 2094 | unsigned int *xfer_shift_out) |
| 2095 | { |
| 2096 | unsigned int mask, shift; |
| 2097 | int x, i; |
| 2098 | |
| 2099 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) { |
| 2100 | shift = xfer_mode_classes[i].shift; |
| 2101 | mask = ata_get_mode_mask(ap, shift); |
| 2102 | |
| 2103 | x = fgb(mask); |
| 2104 | if (x >= 0) { |
| 2105 | *xfer_mode_out = xfer_mode_classes[i].base + x; |
| 2106 | *xfer_shift_out = shift; |
| 2107 | return 0; |
| 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | return -1; |
| 2112 | } |
| 2113 | |
| 2114 | /** |
| 2115 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
| 2116 | * @ap: Port associated with device @dev |
| 2117 | * @dev: Device to which command will be sent |
| 2118 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2119 | * Issue SET FEATURES - XFER MODE command to device @dev |
| 2120 | * on port @ap. |
| 2121 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2123 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | */ |
| 2125 | |
| 2126 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) |
| 2127 | { |
| 2128 | DECLARE_COMPLETION(wait); |
| 2129 | struct ata_queued_cmd *qc; |
| 2130 | int rc; |
| 2131 | unsigned long flags; |
| 2132 | |
| 2133 | /* set up set-features taskfile */ |
| 2134 | DPRINTK("set features - xfer mode\n"); |
| 2135 | |
| 2136 | qc = ata_qc_new_init(ap, dev); |
| 2137 | BUG_ON(qc == NULL); |
| 2138 | |
| 2139 | qc->tf.command = ATA_CMD_SET_FEATURES; |
| 2140 | qc->tf.feature = SETFEATURES_XFER; |
| 2141 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2142 | qc->tf.protocol = ATA_PROT_NODATA; |
| 2143 | qc->tf.nsect = dev->xfer_mode; |
| 2144 | |
| 2145 | qc->waiting = &wait; |
| 2146 | qc->complete_fn = ata_qc_complete_noop; |
| 2147 | |
| 2148 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2149 | rc = ata_qc_issue(qc); |
| 2150 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2151 | |
| 2152 | if (rc) |
| 2153 | ata_port_disable(ap); |
| 2154 | else |
| 2155 | wait_for_completion(&wait); |
| 2156 | |
| 2157 | DPRINTK("EXIT\n"); |
| 2158 | } |
| 2159 | |
| 2160 | /** |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame^] | 2161 | * ata_dev_reread_id - Reread the device identify device info |
| 2162 | * @ap: port where the device is |
| 2163 | * @dev: device to reread the identify device info |
| 2164 | * |
| 2165 | * LOCKING: |
| 2166 | */ |
| 2167 | |
| 2168 | static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev) |
| 2169 | { |
| 2170 | DECLARE_COMPLETION(wait); |
| 2171 | struct ata_queued_cmd *qc; |
| 2172 | unsigned long flags; |
| 2173 | int rc; |
| 2174 | |
| 2175 | qc = ata_qc_new_init(ap, dev); |
| 2176 | BUG_ON(qc == NULL); |
| 2177 | |
| 2178 | ata_sg_init_one(qc, dev->id, sizeof(dev->id)); |
| 2179 | qc->dma_dir = DMA_FROM_DEVICE; |
| 2180 | |
| 2181 | if (dev->class == ATA_DEV_ATA) { |
| 2182 | qc->tf.command = ATA_CMD_ID_ATA; |
| 2183 | DPRINTK("do ATA identify\n"); |
| 2184 | } else { |
| 2185 | qc->tf.command = ATA_CMD_ID_ATAPI; |
| 2186 | DPRINTK("do ATAPI identify\n"); |
| 2187 | } |
| 2188 | |
| 2189 | qc->tf.flags |= ATA_TFLAG_DEVICE; |
| 2190 | qc->tf.protocol = ATA_PROT_PIO; |
| 2191 | qc->nsect = 1; |
| 2192 | |
| 2193 | qc->waiting = &wait; |
| 2194 | qc->complete_fn = ata_qc_complete_noop; |
| 2195 | |
| 2196 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2197 | rc = ata_qc_issue(qc); |
| 2198 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2199 | |
| 2200 | if (rc) |
| 2201 | goto err_out; |
| 2202 | |
| 2203 | wait_for_completion(&wait); |
| 2204 | |
| 2205 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
| 2206 | |
| 2207 | ata_dump_id(dev); |
| 2208 | |
| 2209 | DPRINTK("EXIT\n"); |
| 2210 | |
| 2211 | return; |
| 2212 | err_out: |
| 2213 | ata_port_disable(ap); |
| 2214 | } |
| 2215 | |
| 2216 | /** |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2217 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
| 2218 | * @ap: Port associated with device @dev |
| 2219 | * @dev: Device to which command will be sent |
| 2220 | * |
| 2221 | * LOCKING: |
| 2222 | */ |
| 2223 | |
| 2224 | static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev) |
| 2225 | { |
| 2226 | DECLARE_COMPLETION(wait); |
| 2227 | struct ata_queued_cmd *qc; |
| 2228 | int rc; |
| 2229 | unsigned long flags; |
| 2230 | u16 sectors = dev->id[6]; |
| 2231 | u16 heads = dev->id[3]; |
| 2232 | |
| 2233 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 2234 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
| 2235 | return; |
| 2236 | |
| 2237 | /* set up init dev params taskfile */ |
| 2238 | DPRINTK("init dev params \n"); |
| 2239 | |
| 2240 | qc = ata_qc_new_init(ap, dev); |
| 2241 | BUG_ON(qc == NULL); |
| 2242 | |
| 2243 | qc->tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 2244 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2245 | qc->tf.protocol = ATA_PROT_NODATA; |
| 2246 | qc->tf.nsect = sectors; |
| 2247 | qc->tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
| 2248 | |
| 2249 | qc->waiting = &wait; |
| 2250 | qc->complete_fn = ata_qc_complete_noop; |
| 2251 | |
| 2252 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2253 | rc = ata_qc_issue(qc); |
| 2254 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2255 | |
| 2256 | if (rc) |
| 2257 | ata_port_disable(ap); |
| 2258 | else |
| 2259 | wait_for_completion(&wait); |
| 2260 | |
| 2261 | DPRINTK("EXIT\n"); |
| 2262 | } |
| 2263 | |
| 2264 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2265 | * ata_sg_clean - Unmap DMA memory associated with command |
| 2266 | * @qc: Command containing DMA memory to be released |
| 2267 | * |
| 2268 | * Unmap all mapped DMA memory associated with this command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | * |
| 2270 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2271 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | */ |
| 2273 | |
| 2274 | static void ata_sg_clean(struct ata_queued_cmd *qc) |
| 2275 | { |
| 2276 | struct ata_port *ap = qc->ap; |
| 2277 | struct scatterlist *sg = qc->sg; |
| 2278 | int dir = qc->dma_dir; |
| 2279 | |
| 2280 | assert(qc->flags & ATA_QCFLAG_DMAMAP); |
| 2281 | assert(sg != NULL); |
| 2282 | |
| 2283 | if (qc->flags & ATA_QCFLAG_SINGLE) |
| 2284 | assert(qc->n_elem == 1); |
| 2285 | |
| 2286 | DPRINTK("unmapping %u sg elements\n", qc->n_elem); |
| 2287 | |
| 2288 | if (qc->flags & ATA_QCFLAG_SG) |
| 2289 | dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir); |
| 2290 | else |
| 2291 | dma_unmap_single(ap->host_set->dev, sg_dma_address(&sg[0]), |
| 2292 | sg_dma_len(&sg[0]), dir); |
| 2293 | |
| 2294 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 2295 | qc->sg = NULL; |
| 2296 | } |
| 2297 | |
| 2298 | /** |
| 2299 | * ata_fill_sg - Fill PCI IDE PRD table |
| 2300 | * @qc: Metadata associated with taskfile to be transferred |
| 2301 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2302 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2303 | * associated with the current disk command. |
| 2304 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | * LOCKING: |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2306 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | * |
| 2308 | */ |
| 2309 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 2310 | { |
| 2311 | struct scatterlist *sg = qc->sg; |
| 2312 | struct ata_port *ap = qc->ap; |
| 2313 | unsigned int idx, nelem; |
| 2314 | |
| 2315 | assert(sg != NULL); |
| 2316 | assert(qc->n_elem > 0); |
| 2317 | |
| 2318 | idx = 0; |
| 2319 | for (nelem = qc->n_elem; nelem; nelem--,sg++) { |
| 2320 | u32 addr, offset; |
| 2321 | u32 sg_len, len; |
| 2322 | |
| 2323 | /* determine if physical DMA addr spans 64K boundary. |
| 2324 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2325 | * truncate dma_addr_t to u32. |
| 2326 | */ |
| 2327 | addr = (u32) sg_dma_address(sg); |
| 2328 | sg_len = sg_dma_len(sg); |
| 2329 | |
| 2330 | while (sg_len) { |
| 2331 | offset = addr & 0xffff; |
| 2332 | len = sg_len; |
| 2333 | if ((offset + sg_len) > 0x10000) |
| 2334 | len = 0x10000 - offset; |
| 2335 | |
| 2336 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 2337 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); |
| 2338 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 2339 | |
| 2340 | idx++; |
| 2341 | sg_len -= len; |
| 2342 | addr += len; |
| 2343 | } |
| 2344 | } |
| 2345 | |
| 2346 | if (idx) |
| 2347 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 2348 | } |
| 2349 | /** |
| 2350 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 2351 | * @qc: Metadata associated with taskfile to check |
| 2352 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2353 | * Allow low-level driver to filter ATA PACKET commands, returning |
| 2354 | * a status indicating whether or not it is OK to use DMA for the |
| 2355 | * supplied PACKET command. |
| 2356 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2358 | * spin_lock_irqsave(host_set lock) |
| 2359 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | * RETURNS: 0 when ATAPI DMA can be used |
| 2361 | * nonzero otherwise |
| 2362 | */ |
| 2363 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 2364 | { |
| 2365 | struct ata_port *ap = qc->ap; |
| 2366 | int rc = 0; /* Assume ATAPI DMA is OK by default */ |
| 2367 | |
| 2368 | if (ap->ops->check_atapi_dma) |
| 2369 | rc = ap->ops->check_atapi_dma(qc); |
| 2370 | |
| 2371 | return rc; |
| 2372 | } |
| 2373 | /** |
| 2374 | * ata_qc_prep - Prepare taskfile for submission |
| 2375 | * @qc: Metadata associated with taskfile to be prepared |
| 2376 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2377 | * Prepare ATA taskfile for submission. |
| 2378 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2379 | * LOCKING: |
| 2380 | * spin_lock_irqsave(host_set lock) |
| 2381 | */ |
| 2382 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 2383 | { |
| 2384 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2385 | return; |
| 2386 | |
| 2387 | ata_fill_sg(qc); |
| 2388 | } |
| 2389 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2390 | /** |
| 2391 | * ata_sg_init_one - Associate command with memory buffer |
| 2392 | * @qc: Command to be associated |
| 2393 | * @buf: Memory buffer |
| 2394 | * @buflen: Length of memory buffer, in bytes. |
| 2395 | * |
| 2396 | * Initialize the data-related elements of queued_cmd @qc |
| 2397 | * to point to a single memory buffer, @buf of byte length @buflen. |
| 2398 | * |
| 2399 | * LOCKING: |
| 2400 | * spin_lock_irqsave(host_set lock) |
| 2401 | */ |
| 2402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
| 2404 | { |
| 2405 | struct scatterlist *sg; |
| 2406 | |
| 2407 | qc->flags |= ATA_QCFLAG_SINGLE; |
| 2408 | |
| 2409 | memset(&qc->sgent, 0, sizeof(qc->sgent)); |
| 2410 | qc->sg = &qc->sgent; |
| 2411 | qc->n_elem = 1; |
| 2412 | qc->buf_virt = buf; |
| 2413 | |
| 2414 | sg = qc->sg; |
| 2415 | sg->page = virt_to_page(buf); |
| 2416 | sg->offset = (unsigned long) buf & ~PAGE_MASK; |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2417 | sg->length = buflen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | } |
| 2419 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2420 | /** |
| 2421 | * ata_sg_init - Associate command with scatter-gather table. |
| 2422 | * @qc: Command to be associated |
| 2423 | * @sg: Scatter-gather table. |
| 2424 | * @n_elem: Number of elements in s/g table. |
| 2425 | * |
| 2426 | * Initialize the data-related elements of queued_cmd @qc |
| 2427 | * to point to a scatter-gather table @sg, containing @n_elem |
| 2428 | * elements. |
| 2429 | * |
| 2430 | * LOCKING: |
| 2431 | * spin_lock_irqsave(host_set lock) |
| 2432 | */ |
| 2433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 2435 | unsigned int n_elem) |
| 2436 | { |
| 2437 | qc->flags |= ATA_QCFLAG_SG; |
| 2438 | qc->sg = sg; |
| 2439 | qc->n_elem = n_elem; |
| 2440 | } |
| 2441 | |
| 2442 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2443 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
| 2444 | * @qc: Command with memory buffer to be mapped. |
| 2445 | * |
| 2446 | * DMA-map the memory buffer associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | * |
| 2448 | * LOCKING: |
| 2449 | * spin_lock_irqsave(host_set lock) |
| 2450 | * |
| 2451 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2452 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | */ |
| 2454 | |
| 2455 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) |
| 2456 | { |
| 2457 | struct ata_port *ap = qc->ap; |
| 2458 | int dir = qc->dma_dir; |
| 2459 | struct scatterlist *sg = qc->sg; |
| 2460 | dma_addr_t dma_address; |
| 2461 | |
| 2462 | dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2463 | sg->length, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | if (dma_mapping_error(dma_address)) |
| 2465 | return -1; |
| 2466 | |
| 2467 | sg_dma_address(sg) = dma_address; |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2468 | sg_dma_len(sg) = sg->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | |
| 2470 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
| 2471 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2472 | |
| 2473 | return 0; |
| 2474 | } |
| 2475 | |
| 2476 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2477 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| 2478 | * @qc: Command with scatter-gather table to be mapped. |
| 2479 | * |
| 2480 | * DMA-map the scatter-gather table associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | * |
| 2482 | * LOCKING: |
| 2483 | * spin_lock_irqsave(host_set lock) |
| 2484 | * |
| 2485 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2486 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | * |
| 2488 | */ |
| 2489 | |
| 2490 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 2491 | { |
| 2492 | struct ata_port *ap = qc->ap; |
| 2493 | struct scatterlist *sg = qc->sg; |
| 2494 | int n_elem, dir; |
| 2495 | |
| 2496 | VPRINTK("ENTER, ata%u\n", ap->id); |
| 2497 | assert(qc->flags & ATA_QCFLAG_SG); |
| 2498 | |
| 2499 | dir = qc->dma_dir; |
| 2500 | n_elem = dma_map_sg(ap->host_set->dev, sg, qc->n_elem, dir); |
| 2501 | if (n_elem < 1) |
| 2502 | return -1; |
| 2503 | |
| 2504 | DPRINTK("%d sg elements mapped\n", n_elem); |
| 2505 | |
| 2506 | qc->n_elem = n_elem; |
| 2507 | |
| 2508 | return 0; |
| 2509 | } |
| 2510 | |
| 2511 | /** |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2512 | * ata_poll_qc_complete - turn irq back on and finish qc |
| 2513 | * @qc: Command to complete |
| 2514 | * @drv_stat: ATA status register content |
| 2515 | * |
| 2516 | * LOCKING: |
| 2517 | * None. (grabs host lock) |
| 2518 | */ |
| 2519 | |
| 2520 | void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) |
| 2521 | { |
| 2522 | struct ata_port *ap = qc->ap; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2523 | unsigned long flags; |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2524 | |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2525 | spin_lock_irqsave(&ap->host_set->lock, flags); |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2526 | ap->flags &= ~ATA_FLAG_NOINTR; |
| 2527 | ata_irq_on(ap); |
| 2528 | ata_qc_complete(qc, drv_stat); |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2529 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2530 | } |
| 2531 | |
| 2532 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | * ata_pio_poll - |
| 2534 | * @ap: |
| 2535 | * |
| 2536 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2537 | * None. (executing in kernel thread context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | * |
| 2539 | * RETURNS: |
| 2540 | * |
| 2541 | */ |
| 2542 | |
| 2543 | static unsigned long ata_pio_poll(struct ata_port *ap) |
| 2544 | { |
| 2545 | u8 status; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2546 | unsigned int poll_state = HSM_ST_UNKNOWN; |
| 2547 | unsigned int reg_state = HSM_ST_UNKNOWN; |
| 2548 | const unsigned int tmout_state = HSM_ST_TMOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2550 | switch (ap->hsm_task_state) { |
| 2551 | case HSM_ST: |
| 2552 | case HSM_ST_POLL: |
| 2553 | poll_state = HSM_ST_POLL; |
| 2554 | reg_state = HSM_ST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | break; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2556 | case HSM_ST_LAST: |
| 2557 | case HSM_ST_LAST_POLL: |
| 2558 | poll_state = HSM_ST_LAST_POLL; |
| 2559 | reg_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | break; |
| 2561 | default: |
| 2562 | BUG(); |
| 2563 | break; |
| 2564 | } |
| 2565 | |
| 2566 | status = ata_chk_status(ap); |
| 2567 | if (status & ATA_BUSY) { |
| 2568 | if (time_after(jiffies, ap->pio_task_timeout)) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2569 | ap->hsm_task_state = tmout_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | return 0; |
| 2571 | } |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2572 | ap->hsm_task_state = poll_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | return ATA_SHORT_PAUSE; |
| 2574 | } |
| 2575 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2576 | ap->hsm_task_state = reg_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | return 0; |
| 2578 | } |
| 2579 | |
| 2580 | /** |
| 2581 | * ata_pio_complete - |
| 2582 | * @ap: |
| 2583 | * |
| 2584 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2585 | * None. (executing in kernel thread context) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2586 | * |
| 2587 | * RETURNS: |
| 2588 | * Non-zero if qc completed, zero otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | */ |
| 2590 | |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2591 | static int ata_pio_complete (struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | { |
| 2593 | struct ata_queued_cmd *qc; |
| 2594 | u8 drv_stat; |
| 2595 | |
| 2596 | /* |
Alan Cox | 31433ea | 2005-08-26 15:56:47 +0100 | [diff] [blame] | 2597 | * This is purely heuristic. This is a fast path. Sometimes when |
| 2598 | * we enter, BSY will be cleared in a chk-status or two. If not, |
| 2599 | * the drive is probably seeking or something. Snooze for a couple |
| 2600 | * msecs, then chk-status again. If still busy, fall back to |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2601 | * HSM_ST_POLL state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2602 | */ |
| 2603 | drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); |
| 2604 | if (drv_stat & (ATA_BUSY | ATA_DRQ)) { |
| 2605 | msleep(2); |
| 2606 | drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); |
| 2607 | if (drv_stat & (ATA_BUSY | ATA_DRQ)) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2608 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2610 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | } |
| 2612 | } |
| 2613 | |
| 2614 | drv_stat = ata_wait_idle(ap); |
| 2615 | if (!ata_ok(drv_stat)) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2616 | ap->hsm_task_state = HSM_ST_ERR; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2617 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | } |
| 2619 | |
| 2620 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2621 | assert(qc != NULL); |
| 2622 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2623 | ap->hsm_task_state = HSM_ST_IDLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2625 | ata_poll_qc_complete(qc, drv_stat); |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2626 | |
| 2627 | /* another command may start at this point */ |
| 2628 | |
| 2629 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | } |
| 2631 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 2632 | |
| 2633 | /** |
| 2634 | * swap_buf_le16 - |
| 2635 | * @buf: Buffer to swap |
| 2636 | * @buf_words: Number of 16-bit words in buffer. |
| 2637 | * |
| 2638 | * Swap halves of 16-bit words if needed to convert from |
| 2639 | * little-endian byte order to native cpu byte order, or |
| 2640 | * vice-versa. |
| 2641 | * |
| 2642 | * LOCKING: |
| 2643 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 2645 | { |
| 2646 | #ifdef __BIG_ENDIAN |
| 2647 | unsigned int i; |
| 2648 | |
| 2649 | for (i = 0; i < buf_words; i++) |
| 2650 | buf[i] = le16_to_cpu(buf[i]); |
| 2651 | #endif /* __BIG_ENDIAN */ |
| 2652 | } |
| 2653 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2654 | /** |
| 2655 | * ata_mmio_data_xfer - Transfer data by MMIO |
| 2656 | * @ap: port to read/write |
| 2657 | * @buf: data buffer |
| 2658 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 2659 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2660 | * |
| 2661 | * Transfer data from/to the device data register by MMIO. |
| 2662 | * |
| 2663 | * LOCKING: |
| 2664 | * Inherited from caller. |
| 2665 | * |
| 2666 | */ |
| 2667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2668 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2669 | unsigned int buflen, int write_data) |
| 2670 | { |
| 2671 | unsigned int i; |
| 2672 | unsigned int words = buflen >> 1; |
| 2673 | u16 *buf16 = (u16 *) buf; |
| 2674 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; |
| 2675 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2676 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2677 | if (write_data) { |
| 2678 | for (i = 0; i < words; i++) |
| 2679 | writew(le16_to_cpu(buf16[i]), mmio); |
| 2680 | } else { |
| 2681 | for (i = 0; i < words; i++) |
| 2682 | buf16[i] = cpu_to_le16(readw(mmio)); |
| 2683 | } |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2684 | |
| 2685 | /* Transfer trailing 1 byte, if any. */ |
| 2686 | if (unlikely(buflen & 0x01)) { |
| 2687 | u16 align_buf[1] = { 0 }; |
| 2688 | unsigned char *trailing_buf = buf + buflen - 1; |
| 2689 | |
| 2690 | if (write_data) { |
| 2691 | memcpy(align_buf, trailing_buf, 1); |
| 2692 | writew(le16_to_cpu(align_buf[0]), mmio); |
| 2693 | } else { |
| 2694 | align_buf[0] = cpu_to_le16(readw(mmio)); |
| 2695 | memcpy(trailing_buf, align_buf, 1); |
| 2696 | } |
| 2697 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2698 | } |
| 2699 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2700 | /** |
| 2701 | * ata_pio_data_xfer - Transfer data by PIO |
| 2702 | * @ap: port to read/write |
| 2703 | * @buf: data buffer |
| 2704 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 2705 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2706 | * |
| 2707 | * Transfer data from/to the device data register by PIO. |
| 2708 | * |
| 2709 | * LOCKING: |
| 2710 | * Inherited from caller. |
| 2711 | * |
| 2712 | */ |
| 2713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2714 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2715 | unsigned int buflen, int write_data) |
| 2716 | { |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2717 | unsigned int words = buflen >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2719 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | if (write_data) |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2721 | outsw(ap->ioaddr.data_addr, buf, words); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2722 | else |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2723 | insw(ap->ioaddr.data_addr, buf, words); |
| 2724 | |
| 2725 | /* Transfer trailing 1 byte, if any. */ |
| 2726 | if (unlikely(buflen & 0x01)) { |
| 2727 | u16 align_buf[1] = { 0 }; |
| 2728 | unsigned char *trailing_buf = buf + buflen - 1; |
| 2729 | |
| 2730 | if (write_data) { |
| 2731 | memcpy(align_buf, trailing_buf, 1); |
| 2732 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
| 2733 | } else { |
| 2734 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); |
| 2735 | memcpy(trailing_buf, align_buf, 1); |
| 2736 | } |
| 2737 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | } |
| 2739 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2740 | /** |
| 2741 | * ata_data_xfer - Transfer data from/to the data register. |
| 2742 | * @ap: port to read/write |
| 2743 | * @buf: data buffer |
| 2744 | * @buflen: buffer length |
| 2745 | * @do_write: read/write |
| 2746 | * |
| 2747 | * Transfer data from/to the device data register. |
| 2748 | * |
| 2749 | * LOCKING: |
| 2750 | * Inherited from caller. |
| 2751 | * |
| 2752 | */ |
| 2753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 2755 | unsigned int buflen, int do_write) |
| 2756 | { |
| 2757 | if (ap->flags & ATA_FLAG_MMIO) |
| 2758 | ata_mmio_data_xfer(ap, buf, buflen, do_write); |
| 2759 | else |
| 2760 | ata_pio_data_xfer(ap, buf, buflen, do_write); |
| 2761 | } |
| 2762 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2763 | /** |
| 2764 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. |
| 2765 | * @qc: Command on going |
| 2766 | * |
| 2767 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. |
| 2768 | * |
| 2769 | * LOCKING: |
| 2770 | * Inherited from caller. |
| 2771 | */ |
| 2772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 2774 | { |
| 2775 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2776 | struct scatterlist *sg = qc->sg; |
| 2777 | struct ata_port *ap = qc->ap; |
| 2778 | struct page *page; |
| 2779 | unsigned int offset; |
| 2780 | unsigned char *buf; |
| 2781 | |
| 2782 | if (qc->cursect == (qc->nsect - 1)) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2783 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | |
| 2785 | page = sg[qc->cursg].page; |
| 2786 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; |
| 2787 | |
| 2788 | /* get the current page and offset */ |
| 2789 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 2790 | offset %= PAGE_SIZE; |
| 2791 | |
| 2792 | buf = kmap(page) + offset; |
| 2793 | |
| 2794 | qc->cursect++; |
| 2795 | qc->cursg_ofs++; |
| 2796 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2797 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | qc->cursg++; |
| 2799 | qc->cursg_ofs = 0; |
| 2800 | } |
| 2801 | |
| 2802 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2803 | |
| 2804 | /* do the actual data transfer */ |
| 2805 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2806 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); |
| 2807 | |
| 2808 | kunmap(page); |
| 2809 | } |
| 2810 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2811 | /** |
| 2812 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 2813 | * @qc: Command on going |
| 2814 | * @bytes: number of bytes |
| 2815 | * |
| 2816 | * Transfer Transfer data from/to the ATAPI device. |
| 2817 | * |
| 2818 | * LOCKING: |
| 2819 | * Inherited from caller. |
| 2820 | * |
| 2821 | */ |
| 2822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2823 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 2824 | { |
| 2825 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2826 | struct scatterlist *sg = qc->sg; |
| 2827 | struct ata_port *ap = qc->ap; |
| 2828 | struct page *page; |
| 2829 | unsigned char *buf; |
| 2830 | unsigned int offset, count; |
| 2831 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2832 | if (qc->curbytes + bytes >= qc->nbytes) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2833 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | |
| 2835 | next_sg: |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2836 | if (unlikely(qc->cursg >= qc->n_elem)) { |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2837 | /* |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2838 | * The end of qc->sg is reached and the device expects |
| 2839 | * more data to transfer. In order not to overrun qc->sg |
| 2840 | * and fulfill length specified in the byte count register, |
| 2841 | * - for read case, discard trailing data from the device |
| 2842 | * - for write case, padding zero data to the device |
| 2843 | */ |
| 2844 | u16 pad_buf[1] = { 0 }; |
| 2845 | unsigned int words = bytes >> 1; |
| 2846 | unsigned int i; |
| 2847 | |
| 2848 | if (words) /* warning if bytes > 1 */ |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2849 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2850 | ap->id, bytes); |
| 2851 | |
| 2852 | for (i = 0; i < words; i++) |
| 2853 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); |
| 2854 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2855 | ap->hsm_task_state = HSM_ST_LAST; |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2856 | return; |
| 2857 | } |
| 2858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | sg = &qc->sg[qc->cursg]; |
| 2860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | page = sg->page; |
| 2862 | offset = sg->offset + qc->cursg_ofs; |
| 2863 | |
| 2864 | /* get the current page and offset */ |
| 2865 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 2866 | offset %= PAGE_SIZE; |
| 2867 | |
Albert Lee | 6952df0 | 2005-06-06 15:56:03 +0800 | [diff] [blame] | 2868 | /* don't overrun current sg */ |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2869 | count = min(sg->length - qc->cursg_ofs, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2870 | |
| 2871 | /* don't cross page boundaries */ |
| 2872 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 2873 | |
| 2874 | buf = kmap(page) + offset; |
| 2875 | |
| 2876 | bytes -= count; |
| 2877 | qc->curbytes += count; |
| 2878 | qc->cursg_ofs += count; |
| 2879 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2880 | if (qc->cursg_ofs == sg->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | qc->cursg++; |
| 2882 | qc->cursg_ofs = 0; |
| 2883 | } |
| 2884 | |
| 2885 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2886 | |
| 2887 | /* do the actual data transfer */ |
| 2888 | ata_data_xfer(ap, buf, count, do_write); |
| 2889 | |
| 2890 | kunmap(page); |
| 2891 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 2892 | if (bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | goto next_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2894 | } |
| 2895 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 2896 | /** |
| 2897 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 2898 | * @qc: Command on going |
| 2899 | * |
| 2900 | * Transfer Transfer data from/to the ATAPI device. |
| 2901 | * |
| 2902 | * LOCKING: |
| 2903 | * Inherited from caller. |
| 2904 | * |
| 2905 | */ |
| 2906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 2908 | { |
| 2909 | struct ata_port *ap = qc->ap; |
| 2910 | struct ata_device *dev = qc->dev; |
| 2911 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 2912 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 2913 | |
| 2914 | ap->ops->tf_read(ap, &qc->tf); |
| 2915 | ireason = qc->tf.nsect; |
| 2916 | bc_lo = qc->tf.lbam; |
| 2917 | bc_hi = qc->tf.lbah; |
| 2918 | bytes = (bc_hi << 8) | bc_lo; |
| 2919 | |
| 2920 | /* shall be cleared to zero, indicating xfer of data */ |
| 2921 | if (ireason & (1 << 0)) |
| 2922 | goto err_out; |
| 2923 | |
| 2924 | /* make sure transfer direction matches expected */ |
| 2925 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 2926 | if (do_write != i_write) |
| 2927 | goto err_out; |
| 2928 | |
| 2929 | __atapi_pio_bytes(qc, bytes); |
| 2930 | |
| 2931 | return; |
| 2932 | |
| 2933 | err_out: |
| 2934 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", |
| 2935 | ap->id, dev->devno); |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2936 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2937 | } |
| 2938 | |
| 2939 | /** |
| 2940 | * ata_pio_sector - |
| 2941 | * @ap: |
| 2942 | * |
| 2943 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2944 | * None. (executing in kernel thread context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2945 | */ |
| 2946 | |
| 2947 | static void ata_pio_block(struct ata_port *ap) |
| 2948 | { |
| 2949 | struct ata_queued_cmd *qc; |
| 2950 | u8 status; |
| 2951 | |
| 2952 | /* |
| 2953 | * This is purely hueristic. This is a fast path. |
| 2954 | * Sometimes when we enter, BSY will be cleared in |
| 2955 | * a chk-status or two. If not, the drive is probably seeking |
| 2956 | * or something. Snooze for a couple msecs, then |
| 2957 | * chk-status again. If still busy, fall back to |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2958 | * HSM_ST_POLL state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2959 | */ |
| 2960 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 2961 | if (status & ATA_BUSY) { |
| 2962 | msleep(2); |
| 2963 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 2964 | if (status & ATA_BUSY) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2965 | ap->hsm_task_state = HSM_ST_POLL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2966 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
| 2967 | return; |
| 2968 | } |
| 2969 | } |
| 2970 | |
| 2971 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2972 | assert(qc != NULL); |
| 2973 | |
| 2974 | if (is_atapi_taskfile(&qc->tf)) { |
| 2975 | /* no more data to transfer or unsupported ATAPI command */ |
| 2976 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2977 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | return; |
| 2979 | } |
| 2980 | |
| 2981 | atapi_pio_bytes(qc); |
| 2982 | } else { |
| 2983 | /* handle BSY=0, DRQ=0 as error */ |
| 2984 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2985 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | return; |
| 2987 | } |
| 2988 | |
| 2989 | ata_pio_sector(qc); |
| 2990 | } |
| 2991 | } |
| 2992 | |
| 2993 | static void ata_pio_error(struct ata_port *ap) |
| 2994 | { |
| 2995 | struct ata_queued_cmd *qc; |
| 2996 | u8 drv_stat; |
| 2997 | |
| 2998 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2999 | assert(qc != NULL); |
| 3000 | |
| 3001 | drv_stat = ata_chk_status(ap); |
| 3002 | printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n", |
| 3003 | ap->id, drv_stat); |
| 3004 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3005 | ap->hsm_task_state = HSM_ST_IDLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 3007 | ata_poll_qc_complete(qc, drv_stat | ATA_ERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3008 | } |
| 3009 | |
| 3010 | static void ata_pio_task(void *_data) |
| 3011 | { |
| 3012 | struct ata_port *ap = _data; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3013 | unsigned long timeout; |
| 3014 | int qc_completed; |
| 3015 | |
| 3016 | fsm_start: |
| 3017 | timeout = 0; |
| 3018 | qc_completed = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3019 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3020 | switch (ap->hsm_task_state) { |
| 3021 | case HSM_ST_IDLE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | return; |
| 3023 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3024 | case HSM_ST: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | ata_pio_block(ap); |
| 3026 | break; |
| 3027 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3028 | case HSM_ST_LAST: |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3029 | qc_completed = ata_pio_complete(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | break; |
| 3031 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3032 | case HSM_ST_POLL: |
| 3033 | case HSM_ST_LAST_POLL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | timeout = ata_pio_poll(ap); |
| 3035 | break; |
| 3036 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3037 | case HSM_ST_TMOUT: |
| 3038 | case HSM_ST_ERR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | ata_pio_error(ap); |
| 3040 | return; |
| 3041 | } |
| 3042 | |
| 3043 | if (timeout) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3044 | queue_delayed_work(ata_wq, &ap->pio_task, timeout); |
| 3045 | else if (!qc_completed) |
| 3046 | goto fsm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | } |
| 3048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3049 | /** |
| 3050 | * ata_qc_timeout - Handle timeout of queued command |
| 3051 | * @qc: Command that timed out |
| 3052 | * |
| 3053 | * Some part of the kernel (currently, only the SCSI layer) |
| 3054 | * has noticed that the active command on port @ap has not |
| 3055 | * completed after a specified length of time. Handle this |
| 3056 | * condition by disabling DMA (if necessary) and completing |
| 3057 | * transactions, with error if necessary. |
| 3058 | * |
| 3059 | * This also handles the case of the "lost interrupt", where |
| 3060 | * for some reason (possibly hardware bug, possibly driver bug) |
| 3061 | * an interrupt was not delivered to the driver, even though the |
| 3062 | * transaction completed successfully. |
| 3063 | * |
| 3064 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3065 | * Inherited from SCSI layer (none, can sleep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | */ |
| 3067 | |
| 3068 | static void ata_qc_timeout(struct ata_queued_cmd *qc) |
| 3069 | { |
| 3070 | struct ata_port *ap = qc->ap; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3071 | struct ata_host_set *host_set = ap->host_set; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3072 | struct ata_device *dev = qc->dev; |
| 3073 | u8 host_stat = 0, drv_stat; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3074 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | |
| 3076 | DPRINTK("ENTER\n"); |
| 3077 | |
| 3078 | /* FIXME: doesn't this conflict with timeout handling? */ |
| 3079 | if (qc->dev->class == ATA_DEV_ATAPI && qc->scsicmd) { |
| 3080 | struct scsi_cmnd *cmd = qc->scsicmd; |
| 3081 | |
Christoph Hellwig | 3111b0d | 2005-06-19 13:43:26 +0200 | [diff] [blame] | 3082 | if (!(cmd->eh_eflags & SCSI_EH_CANCEL_CMD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | |
| 3084 | /* finish completing original command */ |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3085 | spin_lock_irqsave(&host_set->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | __ata_qc_complete(qc); |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3087 | spin_unlock_irqrestore(&host_set->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | |
| 3089 | atapi_request_sense(ap, dev, cmd); |
| 3090 | |
| 3091 | cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); |
| 3092 | scsi_finish_command(cmd); |
| 3093 | |
| 3094 | goto out; |
| 3095 | } |
| 3096 | } |
| 3097 | |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3098 | spin_lock_irqsave(&host_set->lock, flags); |
| 3099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | /* hack alert! We cannot use the supplied completion |
| 3101 | * function from inside the ->eh_strategy_handler() thread. |
| 3102 | * libata is the only user of ->eh_strategy_handler() in |
| 3103 | * any kernel, so the default scsi_done() assumes it is |
| 3104 | * not being called from the SCSI EH. |
| 3105 | */ |
| 3106 | qc->scsidone = scsi_finish_command; |
| 3107 | |
| 3108 | switch (qc->tf.protocol) { |
| 3109 | |
| 3110 | case ATA_PROT_DMA: |
| 3111 | case ATA_PROT_ATAPI_DMA: |
| 3112 | host_stat = ap->ops->bmdma_status(ap); |
| 3113 | |
| 3114 | /* before we do anything else, clear DMA-Start bit */ |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3115 | ap->ops->bmdma_stop(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | |
| 3117 | /* fall through */ |
| 3118 | |
| 3119 | default: |
| 3120 | ata_altstatus(ap); |
| 3121 | drv_stat = ata_chk_status(ap); |
| 3122 | |
| 3123 | /* ack bmdma irq events */ |
| 3124 | ap->ops->irq_clear(ap); |
| 3125 | |
| 3126 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", |
| 3127 | ap->id, qc->tf.command, drv_stat, host_stat); |
| 3128 | |
| 3129 | /* complete taskfile transaction */ |
| 3130 | ata_qc_complete(qc, drv_stat); |
| 3131 | break; |
| 3132 | } |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3133 | |
| 3134 | spin_unlock_irqrestore(&host_set->lock, flags); |
| 3135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3136 | out: |
| 3137 | DPRINTK("EXIT\n"); |
| 3138 | } |
| 3139 | |
| 3140 | /** |
| 3141 | * ata_eng_timeout - Handle timeout of queued command |
| 3142 | * @ap: Port on which timed-out command is active |
| 3143 | * |
| 3144 | * Some part of the kernel (currently, only the SCSI layer) |
| 3145 | * has noticed that the active command on port @ap has not |
| 3146 | * completed after a specified length of time. Handle this |
| 3147 | * condition by disabling DMA (if necessary) and completing |
| 3148 | * transactions, with error if necessary. |
| 3149 | * |
| 3150 | * This also handles the case of the "lost interrupt", where |
| 3151 | * for some reason (possibly hardware bug, possibly driver bug) |
| 3152 | * an interrupt was not delivered to the driver, even though the |
| 3153 | * transaction completed successfully. |
| 3154 | * |
| 3155 | * LOCKING: |
| 3156 | * Inherited from SCSI layer (none, can sleep) |
| 3157 | */ |
| 3158 | |
| 3159 | void ata_eng_timeout(struct ata_port *ap) |
| 3160 | { |
| 3161 | struct ata_queued_cmd *qc; |
| 3162 | |
| 3163 | DPRINTK("ENTER\n"); |
| 3164 | |
| 3165 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Jeff Garzik | e12669e | 2005-10-05 18:39:23 -0400 | [diff] [blame] | 3166 | if (qc) |
| 3167 | ata_qc_timeout(qc); |
| 3168 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3169 | printk(KERN_ERR "ata%u: BUG: timeout without command\n", |
| 3170 | ap->id); |
| 3171 | goto out; |
| 3172 | } |
| 3173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3174 | out: |
| 3175 | DPRINTK("EXIT\n"); |
| 3176 | } |
| 3177 | |
| 3178 | /** |
| 3179 | * ata_qc_new - Request an available ATA command, for queueing |
| 3180 | * @ap: Port associated with device @dev |
| 3181 | * @dev: Device from whom we request an available command structure |
| 3182 | * |
| 3183 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3184 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | */ |
| 3186 | |
| 3187 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 3188 | { |
| 3189 | struct ata_queued_cmd *qc = NULL; |
| 3190 | unsigned int i; |
| 3191 | |
| 3192 | for (i = 0; i < ATA_MAX_QUEUE; i++) |
| 3193 | if (!test_and_set_bit(i, &ap->qactive)) { |
| 3194 | qc = ata_qc_from_tag(ap, i); |
| 3195 | break; |
| 3196 | } |
| 3197 | |
| 3198 | if (qc) |
| 3199 | qc->tag = i; |
| 3200 | |
| 3201 | return qc; |
| 3202 | } |
| 3203 | |
| 3204 | /** |
| 3205 | * ata_qc_new_init - Request an available ATA command, and initialize it |
| 3206 | * @ap: Port associated with device @dev |
| 3207 | * @dev: Device from whom we request an available command structure |
| 3208 | * |
| 3209 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3210 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | */ |
| 3212 | |
| 3213 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, |
| 3214 | struct ata_device *dev) |
| 3215 | { |
| 3216 | struct ata_queued_cmd *qc; |
| 3217 | |
| 3218 | qc = ata_qc_new(ap); |
| 3219 | if (qc) { |
| 3220 | qc->sg = NULL; |
| 3221 | qc->flags = 0; |
| 3222 | qc->scsicmd = NULL; |
| 3223 | qc->ap = ap; |
| 3224 | qc->dev = dev; |
| 3225 | qc->cursect = qc->cursg = qc->cursg_ofs = 0; |
| 3226 | qc->nsect = 0; |
| 3227 | qc->nbytes = qc->curbytes = 0; |
| 3228 | |
| 3229 | ata_tf_init(ap, &qc->tf, dev->devno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3230 | } |
| 3231 | |
| 3232 | return qc; |
| 3233 | } |
| 3234 | |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 3235 | int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3236 | { |
| 3237 | return 0; |
| 3238 | } |
| 3239 | |
| 3240 | static void __ata_qc_complete(struct ata_queued_cmd *qc) |
| 3241 | { |
| 3242 | struct ata_port *ap = qc->ap; |
| 3243 | unsigned int tag, do_clear = 0; |
| 3244 | |
| 3245 | qc->flags = 0; |
| 3246 | tag = qc->tag; |
| 3247 | if (likely(ata_tag_valid(tag))) { |
| 3248 | if (tag == ap->active_tag) |
| 3249 | ap->active_tag = ATA_TAG_POISON; |
| 3250 | qc->tag = ATA_TAG_POISON; |
| 3251 | do_clear = 1; |
| 3252 | } |
| 3253 | |
| 3254 | if (qc->waiting) { |
| 3255 | struct completion *waiting = qc->waiting; |
| 3256 | qc->waiting = NULL; |
| 3257 | complete(waiting); |
| 3258 | } |
| 3259 | |
| 3260 | if (likely(do_clear)) |
| 3261 | clear_bit(tag, &ap->qactive); |
| 3262 | } |
| 3263 | |
| 3264 | /** |
| 3265 | * ata_qc_free - free unused ata_queued_cmd |
| 3266 | * @qc: Command to complete |
| 3267 | * |
| 3268 | * Designed to free unused ata_queued_cmd object |
| 3269 | * in case something prevents using it. |
| 3270 | * |
| 3271 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3272 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | * |
| 3274 | */ |
| 3275 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 3276 | { |
| 3277 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 3278 | assert(qc->waiting == NULL); /* nothing should be waiting */ |
| 3279 | |
| 3280 | __ata_qc_complete(qc); |
| 3281 | } |
| 3282 | |
| 3283 | /** |
| 3284 | * ata_qc_complete - Complete an active ATA command |
| 3285 | * @qc: Command to complete |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3286 | * @drv_stat: ATA Status register contents |
| 3287 | * |
| 3288 | * Indicate to the mid and upper layers that an ATA |
| 3289 | * command has completed, with either an ok or not-ok status. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3290 | * |
| 3291 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3292 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | * |
| 3294 | */ |
| 3295 | |
| 3296 | void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) |
| 3297 | { |
| 3298 | int rc; |
| 3299 | |
| 3300 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 3301 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 3302 | |
| 3303 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 3304 | ata_sg_clean(qc); |
| 3305 | |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 3306 | /* atapi: mark qc as inactive to prevent the interrupt handler |
| 3307 | * from completing the command twice later, before the error handler |
| 3308 | * is called. (when rc != 0 and atapi request sense is needed) |
| 3309 | */ |
| 3310 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
| 3311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3312 | /* call completion callback */ |
| 3313 | rc = qc->complete_fn(qc, drv_stat); |
| 3314 | |
| 3315 | /* if callback indicates not to complete command (non-zero), |
| 3316 | * return immediately |
| 3317 | */ |
| 3318 | if (rc != 0) |
| 3319 | return; |
| 3320 | |
| 3321 | __ata_qc_complete(qc); |
| 3322 | |
| 3323 | VPRINTK("EXIT\n"); |
| 3324 | } |
| 3325 | |
| 3326 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
| 3327 | { |
| 3328 | struct ata_port *ap = qc->ap; |
| 3329 | |
| 3330 | switch (qc->tf.protocol) { |
| 3331 | case ATA_PROT_DMA: |
| 3332 | case ATA_PROT_ATAPI_DMA: |
| 3333 | return 1; |
| 3334 | |
| 3335 | case ATA_PROT_ATAPI: |
| 3336 | case ATA_PROT_PIO: |
| 3337 | case ATA_PROT_PIO_MULT: |
| 3338 | if (ap->flags & ATA_FLAG_PIO_DMA) |
| 3339 | return 1; |
| 3340 | |
| 3341 | /* fall through */ |
| 3342 | |
| 3343 | default: |
| 3344 | return 0; |
| 3345 | } |
| 3346 | |
| 3347 | /* never reached */ |
| 3348 | } |
| 3349 | |
| 3350 | /** |
| 3351 | * ata_qc_issue - issue taskfile to device |
| 3352 | * @qc: command to issue to device |
| 3353 | * |
| 3354 | * Prepare an ATA command to submission to device. |
| 3355 | * This includes mapping the data into a DMA-able |
| 3356 | * area, filling in the S/G table, and finally |
| 3357 | * writing the taskfile to hardware, starting the command. |
| 3358 | * |
| 3359 | * LOCKING: |
| 3360 | * spin_lock_irqsave(host_set lock) |
| 3361 | * |
| 3362 | * RETURNS: |
| 3363 | * Zero on success, negative on error. |
| 3364 | */ |
| 3365 | |
| 3366 | int ata_qc_issue(struct ata_queued_cmd *qc) |
| 3367 | { |
| 3368 | struct ata_port *ap = qc->ap; |
| 3369 | |
| 3370 | if (ata_should_dma_map(qc)) { |
| 3371 | if (qc->flags & ATA_QCFLAG_SG) { |
| 3372 | if (ata_sg_setup(qc)) |
| 3373 | goto err_out; |
| 3374 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
| 3375 | if (ata_sg_setup_one(qc)) |
| 3376 | goto err_out; |
| 3377 | } |
| 3378 | } else { |
| 3379 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 3380 | } |
| 3381 | |
| 3382 | ap->ops->qc_prep(qc); |
| 3383 | |
| 3384 | qc->ap->active_tag = qc->tag; |
| 3385 | qc->flags |= ATA_QCFLAG_ACTIVE; |
| 3386 | |
| 3387 | return ap->ops->qc_issue(qc); |
| 3388 | |
| 3389 | err_out: |
| 3390 | return -1; |
| 3391 | } |
| 3392 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3394 | /** |
| 3395 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 3396 | * @qc: command to issue to device |
| 3397 | * |
| 3398 | * Using various libata functions and hooks, this function |
| 3399 | * starts an ATA command. ATA commands are grouped into |
| 3400 | * classes called "protocols", and issuing each type of protocol |
| 3401 | * is slightly different. |
| 3402 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3403 | * May be used as the qc_issue() entry in ata_port_operations. |
| 3404 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | * LOCKING: |
| 3406 | * spin_lock_irqsave(host_set lock) |
| 3407 | * |
| 3408 | * RETURNS: |
| 3409 | * Zero on success, negative on error. |
| 3410 | */ |
| 3411 | |
| 3412 | int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
| 3413 | { |
| 3414 | struct ata_port *ap = qc->ap; |
| 3415 | |
| 3416 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 3417 | |
| 3418 | switch (qc->tf.protocol) { |
| 3419 | case ATA_PROT_NODATA: |
| 3420 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3421 | break; |
| 3422 | |
| 3423 | case ATA_PROT_DMA: |
| 3424 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 3425 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 3426 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 3427 | break; |
| 3428 | |
| 3429 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ |
| 3430 | ata_qc_set_polling(qc); |
| 3431 | ata_tf_to_host_nolock(ap, &qc->tf); |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3432 | ap->hsm_task_state = HSM_ST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3433 | queue_work(ata_wq, &ap->pio_task); |
| 3434 | break; |
| 3435 | |
| 3436 | case ATA_PROT_ATAPI: |
| 3437 | ata_qc_set_polling(qc); |
| 3438 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3439 | queue_work(ata_wq, &ap->packet_task); |
| 3440 | break; |
| 3441 | |
| 3442 | case ATA_PROT_ATAPI_NODATA: |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3443 | ap->flags |= ATA_FLAG_NOINTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | ata_tf_to_host_nolock(ap, &qc->tf); |
| 3445 | queue_work(ata_wq, &ap->packet_task); |
| 3446 | break; |
| 3447 | |
| 3448 | case ATA_PROT_ATAPI_DMA: |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3449 | ap->flags |= ATA_FLAG_NOINTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3450 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 3451 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 3452 | queue_work(ata_wq, &ap->packet_task); |
| 3453 | break; |
| 3454 | |
| 3455 | default: |
| 3456 | WARN_ON(1); |
| 3457 | return -1; |
| 3458 | } |
| 3459 | |
| 3460 | return 0; |
| 3461 | } |
| 3462 | |
| 3463 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3464 | * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3465 | * @qc: Info associated with this ATA transaction. |
| 3466 | * |
| 3467 | * LOCKING: |
| 3468 | * spin_lock_irqsave(host_set lock) |
| 3469 | */ |
| 3470 | |
| 3471 | static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc) |
| 3472 | { |
| 3473 | struct ata_port *ap = qc->ap; |
| 3474 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 3475 | u8 dmactl; |
| 3476 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3477 | |
| 3478 | /* load PRD table addr. */ |
| 3479 | mb(); /* make sure PRD table writes are visible to controller */ |
| 3480 | writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS); |
| 3481 | |
| 3482 | /* specify data direction, triple-check start bit is clear */ |
| 3483 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 3484 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 3485 | if (!rw) |
| 3486 | dmactl |= ATA_DMA_WR; |
| 3487 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 3488 | |
| 3489 | /* issue r/w command */ |
| 3490 | ap->ops->exec_command(ap, &qc->tf); |
| 3491 | } |
| 3492 | |
| 3493 | /** |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3494 | * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3495 | * @qc: Info associated with this ATA transaction. |
| 3496 | * |
| 3497 | * LOCKING: |
| 3498 | * spin_lock_irqsave(host_set lock) |
| 3499 | */ |
| 3500 | |
| 3501 | static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc) |
| 3502 | { |
| 3503 | struct ata_port *ap = qc->ap; |
| 3504 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3505 | u8 dmactl; |
| 3506 | |
| 3507 | /* start host DMA transaction */ |
| 3508 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 3509 | writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD); |
| 3510 | |
| 3511 | /* Strictly, one may wish to issue a readb() here, to |
| 3512 | * flush the mmio write. However, control also passes |
| 3513 | * to the hardware at this point, and it will interrupt |
| 3514 | * us when we are to resume control. So, in effect, |
| 3515 | * we don't care when the mmio write flushes. |
| 3516 | * Further, a read of the DMA status register _immediately_ |
| 3517 | * following the write may not be what certain flaky hardware |
| 3518 | * is expected, so I think it is best to not add a readb() |
| 3519 | * without first all the MMIO ATA cards/mobos. |
| 3520 | * Or maybe I'm just being paranoid. |
| 3521 | */ |
| 3522 | } |
| 3523 | |
| 3524 | /** |
| 3525 | * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO) |
| 3526 | * @qc: Info associated with this ATA transaction. |
| 3527 | * |
| 3528 | * LOCKING: |
| 3529 | * spin_lock_irqsave(host_set lock) |
| 3530 | */ |
| 3531 | |
| 3532 | static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc) |
| 3533 | { |
| 3534 | struct ata_port *ap = qc->ap; |
| 3535 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 3536 | u8 dmactl; |
| 3537 | |
| 3538 | /* load PRD table addr. */ |
| 3539 | outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); |
| 3540 | |
| 3541 | /* specify data direction, triple-check start bit is clear */ |
| 3542 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3543 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 3544 | if (!rw) |
| 3545 | dmactl |= ATA_DMA_WR; |
| 3546 | outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3547 | |
| 3548 | /* issue r/w command */ |
| 3549 | ap->ops->exec_command(ap, &qc->tf); |
| 3550 | } |
| 3551 | |
| 3552 | /** |
| 3553 | * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO) |
| 3554 | * @qc: Info associated with this ATA transaction. |
| 3555 | * |
| 3556 | * LOCKING: |
| 3557 | * spin_lock_irqsave(host_set lock) |
| 3558 | */ |
| 3559 | |
| 3560 | static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) |
| 3561 | { |
| 3562 | struct ata_port *ap = qc->ap; |
| 3563 | u8 dmactl; |
| 3564 | |
| 3565 | /* start host DMA transaction */ |
| 3566 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3567 | outb(dmactl | ATA_DMA_START, |
| 3568 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3569 | } |
| 3570 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3571 | |
| 3572 | /** |
| 3573 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction |
| 3574 | * @qc: Info associated with this ATA transaction. |
| 3575 | * |
| 3576 | * Writes the ATA_DMA_START flag to the DMA command register. |
| 3577 | * |
| 3578 | * May be used as the bmdma_start() entry in ata_port_operations. |
| 3579 | * |
| 3580 | * LOCKING: |
| 3581 | * spin_lock_irqsave(host_set lock) |
| 3582 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
| 3584 | { |
| 3585 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 3586 | ata_bmdma_start_mmio(qc); |
| 3587 | else |
| 3588 | ata_bmdma_start_pio(qc); |
| 3589 | } |
| 3590 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3591 | |
| 3592 | /** |
| 3593 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction |
| 3594 | * @qc: Info associated with this ATA transaction. |
| 3595 | * |
| 3596 | * Writes address of PRD table to device's PRD Table Address |
| 3597 | * register, sets the DMA control register, and calls |
| 3598 | * ops->exec_command() to start the transfer. |
| 3599 | * |
| 3600 | * May be used as the bmdma_setup() entry in ata_port_operations. |
| 3601 | * |
| 3602 | * LOCKING: |
| 3603 | * spin_lock_irqsave(host_set lock) |
| 3604 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
| 3606 | { |
| 3607 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 3608 | ata_bmdma_setup_mmio(qc); |
| 3609 | else |
| 3610 | ata_bmdma_setup_pio(qc); |
| 3611 | } |
| 3612 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3613 | |
| 3614 | /** |
| 3615 | * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. |
Jeff Garzik | decc6d0 | 2005-06-02 18:42:33 -0400 | [diff] [blame] | 3616 | * @ap: Port associated with this ATA transaction. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3617 | * |
| 3618 | * Clear interrupt and error flags in DMA status register. |
| 3619 | * |
| 3620 | * May be used as the irq_clear() entry in ata_port_operations. |
| 3621 | * |
| 3622 | * LOCKING: |
| 3623 | * spin_lock_irqsave(host_set lock) |
| 3624 | */ |
| 3625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3626 | void ata_bmdma_irq_clear(struct ata_port *ap) |
| 3627 | { |
| 3628 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3629 | void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS; |
| 3630 | writeb(readb(mmio), mmio); |
| 3631 | } else { |
| 3632 | unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS; |
| 3633 | outb(inb(addr), addr); |
| 3634 | } |
| 3635 | |
| 3636 | } |
| 3637 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3638 | |
| 3639 | /** |
| 3640 | * ata_bmdma_status - Read PCI IDE BMDMA status |
Jeff Garzik | decc6d0 | 2005-06-02 18:42:33 -0400 | [diff] [blame] | 3641 | * @ap: Port associated with this ATA transaction. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3642 | * |
| 3643 | * Read and return BMDMA status register. |
| 3644 | * |
| 3645 | * May be used as the bmdma_status() entry in ata_port_operations. |
| 3646 | * |
| 3647 | * LOCKING: |
| 3648 | * spin_lock_irqsave(host_set lock) |
| 3649 | */ |
| 3650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3651 | u8 ata_bmdma_status(struct ata_port *ap) |
| 3652 | { |
| 3653 | u8 host_stat; |
| 3654 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3655 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3656 | host_stat = readb(mmio + ATA_DMA_STATUS); |
| 3657 | } else |
Albert Lee | ee500aa | 2005-09-27 17:34:38 +0800 | [diff] [blame] | 3658 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | return host_stat; |
| 3660 | } |
| 3661 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3662 | |
| 3663 | /** |
| 3664 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3665 | * @qc: Command we are ending DMA for |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3666 | * |
| 3667 | * Clears the ATA_DMA_START flag in the dma control register |
| 3668 | * |
| 3669 | * May be used as the bmdma_stop() entry in ata_port_operations. |
| 3670 | * |
| 3671 | * LOCKING: |
| 3672 | * spin_lock_irqsave(host_set lock) |
| 3673 | */ |
| 3674 | |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3675 | void ata_bmdma_stop(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | { |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3677 | struct ata_port *ap = qc->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3678 | if (ap->flags & ATA_FLAG_MMIO) { |
| 3679 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 3680 | |
| 3681 | /* clear start/stop bit */ |
| 3682 | writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3683 | mmio + ATA_DMA_CMD); |
| 3684 | } else { |
| 3685 | /* clear start/stop bit */ |
| 3686 | outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3687 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3688 | } |
| 3689 | |
| 3690 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ |
| 3691 | ata_altstatus(ap); /* dummy read */ |
| 3692 | } |
| 3693 | |
| 3694 | /** |
| 3695 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 3696 | * @ap: Port on which interrupt arrived (possibly...) |
| 3697 | * @qc: Taskfile currently active in engine |
| 3698 | * |
| 3699 | * Handle host interrupt for given queued command. Currently, |
| 3700 | * only DMA interrupts are handled. All other commands are |
| 3701 | * handled via polling with interrupts disabled (nIEN bit). |
| 3702 | * |
| 3703 | * LOCKING: |
| 3704 | * spin_lock_irqsave(host_set lock) |
| 3705 | * |
| 3706 | * RETURNS: |
| 3707 | * One if interrupt was handled, zero if not (shared irq). |
| 3708 | */ |
| 3709 | |
| 3710 | inline unsigned int ata_host_intr (struct ata_port *ap, |
| 3711 | struct ata_queued_cmd *qc) |
| 3712 | { |
| 3713 | u8 status, host_stat; |
| 3714 | |
| 3715 | switch (qc->tf.protocol) { |
| 3716 | |
| 3717 | case ATA_PROT_DMA: |
| 3718 | case ATA_PROT_ATAPI_DMA: |
| 3719 | case ATA_PROT_ATAPI: |
| 3720 | /* check status of DMA engine */ |
| 3721 | host_stat = ap->ops->bmdma_status(ap); |
| 3722 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); |
| 3723 | |
| 3724 | /* if it's not our irq... */ |
| 3725 | if (!(host_stat & ATA_DMA_INTR)) |
| 3726 | goto idle_irq; |
| 3727 | |
| 3728 | /* before we do anything else, clear DMA-Start bit */ |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3729 | ap->ops->bmdma_stop(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | |
| 3731 | /* fall through */ |
| 3732 | |
| 3733 | case ATA_PROT_ATAPI_NODATA: |
| 3734 | case ATA_PROT_NODATA: |
| 3735 | /* check altstatus */ |
| 3736 | status = ata_altstatus(ap); |
| 3737 | if (status & ATA_BUSY) |
| 3738 | goto idle_irq; |
| 3739 | |
| 3740 | /* check main status, clearing INTRQ */ |
| 3741 | status = ata_chk_status(ap); |
| 3742 | if (unlikely(status & ATA_BUSY)) |
| 3743 | goto idle_irq; |
| 3744 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", |
| 3745 | ap->id, qc->tf.protocol, status); |
| 3746 | |
| 3747 | /* ack bmdma irq events */ |
| 3748 | ap->ops->irq_clear(ap); |
| 3749 | |
| 3750 | /* complete taskfile transaction */ |
| 3751 | ata_qc_complete(qc, status); |
| 3752 | break; |
| 3753 | |
| 3754 | default: |
| 3755 | goto idle_irq; |
| 3756 | } |
| 3757 | |
| 3758 | return 1; /* irq handled */ |
| 3759 | |
| 3760 | idle_irq: |
| 3761 | ap->stats.idle_irq++; |
| 3762 | |
| 3763 | #ifdef ATA_IRQ_TRAP |
| 3764 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 3765 | handled = 1; |
| 3766 | ata_irq_ack(ap, 0); /* debug trap */ |
| 3767 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); |
| 3768 | } |
| 3769 | #endif |
| 3770 | return 0; /* irq not handled */ |
| 3771 | } |
| 3772 | |
| 3773 | /** |
| 3774 | * ata_interrupt - Default ATA host interrupt handler |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3775 | * @irq: irq line (unused) |
| 3776 | * @dev_instance: pointer to our ata_host_set information structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | * @regs: unused |
| 3778 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3779 | * Default interrupt handler for PCI IDE devices. Calls |
| 3780 | * ata_host_intr() for each port that is not disabled. |
| 3781 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3782 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3783 | * Obtains host_set lock during operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3784 | * |
| 3785 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3786 | * IRQ_NONE or IRQ_HANDLED. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3787 | * |
| 3788 | */ |
| 3789 | |
| 3790 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) |
| 3791 | { |
| 3792 | struct ata_host_set *host_set = dev_instance; |
| 3793 | unsigned int i; |
| 3794 | unsigned int handled = 0; |
| 3795 | unsigned long flags; |
| 3796 | |
| 3797 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 3798 | spin_lock_irqsave(&host_set->lock, flags); |
| 3799 | |
| 3800 | for (i = 0; i < host_set->n_ports; i++) { |
| 3801 | struct ata_port *ap; |
| 3802 | |
| 3803 | ap = host_set->ports[i]; |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3804 | if (ap && |
| 3805 | !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3806 | struct ata_queued_cmd *qc; |
| 3807 | |
| 3808 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Albert Lee | 21b1ed7 | 2005-04-29 17:34:59 +0800 | [diff] [blame] | 3809 | if (qc && (!(qc->tf.ctl & ATA_NIEN)) && |
| 3810 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3811 | handled |= ata_host_intr(ap, qc); |
| 3812 | } |
| 3813 | } |
| 3814 | |
| 3815 | spin_unlock_irqrestore(&host_set->lock, flags); |
| 3816 | |
| 3817 | return IRQ_RETVAL(handled); |
| 3818 | } |
| 3819 | |
| 3820 | /** |
| 3821 | * atapi_packet_task - Write CDB bytes to hardware |
| 3822 | * @_data: Port to which ATAPI device is attached. |
| 3823 | * |
| 3824 | * When device has indicated its readiness to accept |
| 3825 | * a CDB, this function is called. Send the CDB. |
| 3826 | * If DMA is to be performed, exit immediately. |
| 3827 | * Otherwise, we are in polling mode, so poll |
| 3828 | * status under operation succeeds or fails. |
| 3829 | * |
| 3830 | * LOCKING: |
| 3831 | * Kernel thread context (may sleep) |
| 3832 | */ |
| 3833 | |
| 3834 | static void atapi_packet_task(void *_data) |
| 3835 | { |
| 3836 | struct ata_port *ap = _data; |
| 3837 | struct ata_queued_cmd *qc; |
| 3838 | u8 status; |
| 3839 | |
| 3840 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3841 | assert(qc != NULL); |
| 3842 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 3843 | |
| 3844 | /* sleep-wait for BSY to clear */ |
| 3845 | DPRINTK("busy wait\n"); |
| 3846 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) |
| 3847 | goto err_out; |
| 3848 | |
| 3849 | /* make sure DRQ is set */ |
| 3850 | status = ata_chk_status(ap); |
| 3851 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) |
| 3852 | goto err_out; |
| 3853 | |
| 3854 | /* send SCSI cdb */ |
| 3855 | DPRINTK("send cdb\n"); |
| 3856 | assert(ap->cdb_len >= 12); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3857 | |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3858 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || |
| 3859 | qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { |
| 3860 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3861 | |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3862 | /* Once we're done issuing command and kicking bmdma, |
| 3863 | * irq handler takes over. To not lose irq, we need |
| 3864 | * to clear NOINTR flag before sending cdb, but |
| 3865 | * interrupt handler shouldn't be invoked before we're |
| 3866 | * finished. Hence, the following locking. |
| 3867 | */ |
| 3868 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 3869 | ap->flags &= ~ATA_FLAG_NOINTR; |
| 3870 | ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1); |
| 3871 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) |
| 3872 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 3873 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 3874 | } else { |
| 3875 | ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3876 | |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 3877 | /* PIO commands are handled by polling */ |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3878 | ap->hsm_task_state = HSM_ST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3879 | queue_work(ata_wq, &ap->pio_task); |
| 3880 | } |
| 3881 | |
| 3882 | return; |
| 3883 | |
| 3884 | err_out: |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 3885 | ata_poll_qc_complete(qc, ATA_ERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3886 | } |
| 3887 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3888 | |
| 3889 | /** |
| 3890 | * ata_port_start - Set port up for dma. |
| 3891 | * @ap: Port to initialize |
| 3892 | * |
| 3893 | * Called just after data structures for each port are |
| 3894 | * initialized. Allocates space for PRD table. |
| 3895 | * |
| 3896 | * May be used as the port_start() entry in ata_port_operations. |
| 3897 | * |
| 3898 | * LOCKING: |
| 3899 | */ |
| 3900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | int ata_port_start (struct ata_port *ap) |
| 3902 | { |
| 3903 | struct device *dev = ap->host_set->dev; |
| 3904 | |
| 3905 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); |
| 3906 | if (!ap->prd) |
| 3907 | return -ENOMEM; |
| 3908 | |
| 3909 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
| 3910 | |
| 3911 | return 0; |
| 3912 | } |
| 3913 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3914 | |
| 3915 | /** |
| 3916 | * ata_port_stop - Undo ata_port_start() |
| 3917 | * @ap: Port to shut down |
| 3918 | * |
| 3919 | * Frees the PRD table. |
| 3920 | * |
| 3921 | * May be used as the port_stop() entry in ata_port_operations. |
| 3922 | * |
| 3923 | * LOCKING: |
| 3924 | */ |
| 3925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3926 | void ata_port_stop (struct ata_port *ap) |
| 3927 | { |
| 3928 | struct device *dev = ap->host_set->dev; |
| 3929 | |
| 3930 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
| 3931 | } |
| 3932 | |
Jeff Garzik | aa8f0dc | 2005-05-26 21:54:27 -0400 | [diff] [blame] | 3933 | void ata_host_stop (struct ata_host_set *host_set) |
| 3934 | { |
| 3935 | if (host_set->mmio_base) |
| 3936 | iounmap(host_set->mmio_base); |
| 3937 | } |
| 3938 | |
| 3939 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3940 | /** |
| 3941 | * ata_host_remove - Unregister SCSI host structure with upper layers |
| 3942 | * @ap: Port to unregister |
| 3943 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port |
| 3944 | * |
| 3945 | * LOCKING: |
| 3946 | */ |
| 3947 | |
| 3948 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) |
| 3949 | { |
| 3950 | struct Scsi_Host *sh = ap->host; |
| 3951 | |
| 3952 | DPRINTK("ENTER\n"); |
| 3953 | |
| 3954 | if (do_unregister) |
| 3955 | scsi_remove_host(sh); |
| 3956 | |
| 3957 | ap->ops->port_stop(ap); |
| 3958 | } |
| 3959 | |
| 3960 | /** |
| 3961 | * ata_host_init - Initialize an ata_port structure |
| 3962 | * @ap: Structure to initialize |
| 3963 | * @host: associated SCSI mid-layer structure |
| 3964 | * @host_set: Collection of hosts to which @ap belongs |
| 3965 | * @ent: Probe information provided by low-level driver |
| 3966 | * @port_no: Port number associated with this ata_port |
| 3967 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3968 | * Initialize a new ata_port structure, and its associated |
| 3969 | * scsi_host. |
| 3970 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3971 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3972 | * Inherited from caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3973 | * |
| 3974 | */ |
| 3975 | |
| 3976 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, |
| 3977 | struct ata_host_set *host_set, |
| 3978 | struct ata_probe_ent *ent, unsigned int port_no) |
| 3979 | { |
| 3980 | unsigned int i; |
| 3981 | |
| 3982 | host->max_id = 16; |
| 3983 | host->max_lun = 1; |
| 3984 | host->max_channel = 1; |
| 3985 | host->unique_id = ata_unique_id++; |
| 3986 | host->max_cmd_len = 12; |
Christoph Hellwig | 1241319 | 2005-06-11 01:05:01 +0200 | [diff] [blame] | 3987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3988 | scsi_assign_lock(host, &host_set->lock); |
| 3989 | |
| 3990 | ap->flags = ATA_FLAG_PORT_DISABLED; |
| 3991 | ap->id = host->unique_id; |
| 3992 | ap->host = host; |
| 3993 | ap->ctl = ATA_DEVCTL_OBS; |
| 3994 | ap->host_set = host_set; |
| 3995 | ap->port_no = port_no; |
| 3996 | ap->hard_port_no = |
| 3997 | ent->legacy_mode ? ent->hard_port_no : port_no; |
| 3998 | ap->pio_mask = ent->pio_mask; |
| 3999 | ap->mwdma_mask = ent->mwdma_mask; |
| 4000 | ap->udma_mask = ent->udma_mask; |
| 4001 | ap->flags |= ent->host_flags; |
| 4002 | ap->ops = ent->port_ops; |
| 4003 | ap->cbl = ATA_CBL_NONE; |
| 4004 | ap->active_tag = ATA_TAG_POISON; |
| 4005 | ap->last_ctl = 0xFF; |
| 4006 | |
| 4007 | INIT_WORK(&ap->packet_task, atapi_packet_task, ap); |
| 4008 | INIT_WORK(&ap->pio_task, ata_pio_task, ap); |
| 4009 | |
| 4010 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 4011 | ap->device[i].devno = i; |
| 4012 | |
| 4013 | #ifdef ATA_IRQ_TRAP |
| 4014 | ap->stats.unhandled_irq = 1; |
| 4015 | ap->stats.idle_irq = 1; |
| 4016 | #endif |
| 4017 | |
| 4018 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); |
| 4019 | } |
| 4020 | |
| 4021 | /** |
| 4022 | * ata_host_add - Attach low-level ATA driver to system |
| 4023 | * @ent: Information provided by low-level driver |
| 4024 | * @host_set: Collections of ports to which we add |
| 4025 | * @port_no: Port number associated with this host |
| 4026 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4027 | * Attach low-level ATA driver to system. |
| 4028 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4029 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4030 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4031 | * |
| 4032 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4033 | * New ata_port on success, for NULL on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4034 | * |
| 4035 | */ |
| 4036 | |
| 4037 | static struct ata_port * ata_host_add(struct ata_probe_ent *ent, |
| 4038 | struct ata_host_set *host_set, |
| 4039 | unsigned int port_no) |
| 4040 | { |
| 4041 | struct Scsi_Host *host; |
| 4042 | struct ata_port *ap; |
| 4043 | int rc; |
| 4044 | |
| 4045 | DPRINTK("ENTER\n"); |
| 4046 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
| 4047 | if (!host) |
| 4048 | return NULL; |
| 4049 | |
| 4050 | ap = (struct ata_port *) &host->hostdata[0]; |
| 4051 | |
| 4052 | ata_host_init(ap, host, host_set, ent, port_no); |
| 4053 | |
| 4054 | rc = ap->ops->port_start(ap); |
| 4055 | if (rc) |
| 4056 | goto err_out; |
| 4057 | |
| 4058 | return ap; |
| 4059 | |
| 4060 | err_out: |
| 4061 | scsi_host_put(host); |
| 4062 | return NULL; |
| 4063 | } |
| 4064 | |
| 4065 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4066 | * ata_device_add - Register hardware device with ATA and SCSI layers |
| 4067 | * @ent: Probe information describing hardware device to be registered |
| 4068 | * |
| 4069 | * This function processes the information provided in the probe |
| 4070 | * information struct @ent, allocates the necessary ATA and SCSI |
| 4071 | * host information structures, initializes them, and registers |
| 4072 | * everything with requisite kernel subsystems. |
| 4073 | * |
| 4074 | * This function requests irqs, probes the ATA bus, and probes |
| 4075 | * the SCSI bus. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4076 | * |
| 4077 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4078 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4079 | * |
| 4080 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4081 | * Number of ports registered. Zero on error (no ports registered). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | * |
| 4083 | */ |
| 4084 | |
| 4085 | int ata_device_add(struct ata_probe_ent *ent) |
| 4086 | { |
| 4087 | unsigned int count = 0, i; |
| 4088 | struct device *dev = ent->dev; |
| 4089 | struct ata_host_set *host_set; |
| 4090 | |
| 4091 | DPRINTK("ENTER\n"); |
| 4092 | /* alloc a container for our list of ATA ports (buses) */ |
| 4093 | host_set = kmalloc(sizeof(struct ata_host_set) + |
| 4094 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
| 4095 | if (!host_set) |
| 4096 | return 0; |
| 4097 | memset(host_set, 0, sizeof(struct ata_host_set) + (ent->n_ports * sizeof(void *))); |
| 4098 | spin_lock_init(&host_set->lock); |
| 4099 | |
| 4100 | host_set->dev = dev; |
| 4101 | host_set->n_ports = ent->n_ports; |
| 4102 | host_set->irq = ent->irq; |
| 4103 | host_set->mmio_base = ent->mmio_base; |
| 4104 | host_set->private_data = ent->private_data; |
| 4105 | host_set->ops = ent->port_ops; |
| 4106 | |
| 4107 | /* register each port bound to this device */ |
| 4108 | for (i = 0; i < ent->n_ports; i++) { |
| 4109 | struct ata_port *ap; |
| 4110 | unsigned long xfer_mode_mask; |
| 4111 | |
| 4112 | ap = ata_host_add(ent, host_set, i); |
| 4113 | if (!ap) |
| 4114 | goto err_out; |
| 4115 | |
| 4116 | host_set->ports[i] = ap; |
| 4117 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | |
| 4118 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | |
| 4119 | (ap->pio_mask << ATA_SHIFT_PIO); |
| 4120 | |
| 4121 | /* print per-port info to dmesg */ |
| 4122 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " |
| 4123 | "bmdma 0x%lX irq %lu\n", |
| 4124 | ap->id, |
| 4125 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', |
| 4126 | ata_mode_string(xfer_mode_mask), |
| 4127 | ap->ioaddr.cmd_addr, |
| 4128 | ap->ioaddr.ctl_addr, |
| 4129 | ap->ioaddr.bmdma_addr, |
| 4130 | ent->irq); |
| 4131 | |
| 4132 | ata_chk_status(ap); |
| 4133 | host_set->ops->irq_clear(ap); |
| 4134 | count++; |
| 4135 | } |
| 4136 | |
| 4137 | if (!count) { |
| 4138 | kfree(host_set); |
| 4139 | return 0; |
| 4140 | } |
| 4141 | |
| 4142 | /* obtain irq, that is shared between channels */ |
| 4143 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, |
| 4144 | DRV_NAME, host_set)) |
| 4145 | goto err_out; |
| 4146 | |
| 4147 | /* perform each probe synchronously */ |
| 4148 | DPRINTK("probe begin\n"); |
| 4149 | for (i = 0; i < count; i++) { |
| 4150 | struct ata_port *ap; |
| 4151 | int rc; |
| 4152 | |
| 4153 | ap = host_set->ports[i]; |
| 4154 | |
| 4155 | DPRINTK("ata%u: probe begin\n", ap->id); |
| 4156 | rc = ata_bus_probe(ap); |
| 4157 | DPRINTK("ata%u: probe end\n", ap->id); |
| 4158 | |
| 4159 | if (rc) { |
| 4160 | /* FIXME: do something useful here? |
| 4161 | * Current libata behavior will |
| 4162 | * tear down everything when |
| 4163 | * the module is removed |
| 4164 | * or the h/w is unplugged. |
| 4165 | */ |
| 4166 | } |
| 4167 | |
| 4168 | rc = scsi_add_host(ap->host, dev); |
| 4169 | if (rc) { |
| 4170 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", |
| 4171 | ap->id); |
| 4172 | /* FIXME: do something useful here */ |
| 4173 | /* FIXME: handle unconditional calls to |
| 4174 | * scsi_scan_host and ata_host_remove, below, |
| 4175 | * at the very least |
| 4176 | */ |
| 4177 | } |
| 4178 | } |
| 4179 | |
| 4180 | /* probes are done, now scan each port's disk(s) */ |
| 4181 | DPRINTK("probe begin\n"); |
| 4182 | for (i = 0; i < count; i++) { |
| 4183 | struct ata_port *ap = host_set->ports[i]; |
| 4184 | |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 4185 | ata_scsi_scan_host(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4186 | } |
| 4187 | |
| 4188 | dev_set_drvdata(dev, host_set); |
| 4189 | |
| 4190 | VPRINTK("EXIT, returning %u\n", ent->n_ports); |
| 4191 | return ent->n_ports; /* success */ |
| 4192 | |
| 4193 | err_out: |
| 4194 | for (i = 0; i < count; i++) { |
| 4195 | ata_host_remove(host_set->ports[i], 1); |
| 4196 | scsi_host_put(host_set->ports[i]->host); |
| 4197 | } |
| 4198 | kfree(host_set); |
| 4199 | VPRINTK("EXIT, returning 0\n"); |
| 4200 | return 0; |
| 4201 | } |
| 4202 | |
| 4203 | /** |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 4204 | * ata_host_set_remove - PCI layer callback for device removal |
| 4205 | * @host_set: ATA host set that was removed |
| 4206 | * |
| 4207 | * Unregister all objects associated with this host set. Free those |
| 4208 | * objects. |
| 4209 | * |
| 4210 | * LOCKING: |
| 4211 | * Inherited from calling layer (may sleep). |
| 4212 | */ |
| 4213 | |
| 4214 | |
| 4215 | void ata_host_set_remove(struct ata_host_set *host_set) |
| 4216 | { |
| 4217 | struct ata_port *ap; |
| 4218 | unsigned int i; |
| 4219 | |
| 4220 | for (i = 0; i < host_set->n_ports; i++) { |
| 4221 | ap = host_set->ports[i]; |
| 4222 | scsi_remove_host(ap->host); |
| 4223 | } |
| 4224 | |
| 4225 | free_irq(host_set->irq, host_set); |
| 4226 | |
| 4227 | for (i = 0; i < host_set->n_ports; i++) { |
| 4228 | ap = host_set->ports[i]; |
| 4229 | |
| 4230 | ata_scsi_release(ap->host); |
| 4231 | |
| 4232 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { |
| 4233 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 4234 | |
| 4235 | if (ioaddr->cmd_addr == 0x1f0) |
| 4236 | release_region(0x1f0, 8); |
| 4237 | else if (ioaddr->cmd_addr == 0x170) |
| 4238 | release_region(0x170, 8); |
| 4239 | } |
| 4240 | |
| 4241 | scsi_host_put(ap->host); |
| 4242 | } |
| 4243 | |
| 4244 | if (host_set->ops->host_stop) |
| 4245 | host_set->ops->host_stop(host_set); |
| 4246 | |
| 4247 | kfree(host_set); |
| 4248 | } |
| 4249 | |
| 4250 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | * ata_scsi_release - SCSI layer callback hook for host unload |
| 4252 | * @host: libata host to be unloaded |
| 4253 | * |
| 4254 | * Performs all duties necessary to shut down a libata port... |
| 4255 | * Kill port kthread, disable port, and release resources. |
| 4256 | * |
| 4257 | * LOCKING: |
| 4258 | * Inherited from SCSI layer. |
| 4259 | * |
| 4260 | * RETURNS: |
| 4261 | * One. |
| 4262 | */ |
| 4263 | |
| 4264 | int ata_scsi_release(struct Scsi_Host *host) |
| 4265 | { |
| 4266 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; |
| 4267 | |
| 4268 | DPRINTK("ENTER\n"); |
| 4269 | |
| 4270 | ap->ops->port_disable(ap); |
| 4271 | ata_host_remove(ap, 0); |
| 4272 | |
| 4273 | DPRINTK("EXIT\n"); |
| 4274 | return 1; |
| 4275 | } |
| 4276 | |
| 4277 | /** |
| 4278 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 4279 | * @ioaddr: IO address structure to be initialized |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4280 | * |
| 4281 | * Utility function which initializes data_addr, error_addr, |
| 4282 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 4283 | * device_addr, status_addr, and command_addr to standard offsets |
| 4284 | * relative to cmd_addr. |
| 4285 | * |
| 4286 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | */ |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4289 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 4290 | { |
| 4291 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 4292 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 4293 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 4294 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 4295 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 4296 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 4297 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 4298 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 4299 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 4300 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 4301 | } |
| 4302 | |
| 4303 | static struct ata_probe_ent * |
| 4304 | ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) |
| 4305 | { |
| 4306 | struct ata_probe_ent *probe_ent; |
| 4307 | |
| 4308 | probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); |
| 4309 | if (!probe_ent) { |
| 4310 | printk(KERN_ERR DRV_NAME "(%s): out of memory\n", |
| 4311 | kobject_name(&(dev->kobj))); |
| 4312 | return NULL; |
| 4313 | } |
| 4314 | |
| 4315 | memset(probe_ent, 0, sizeof(*probe_ent)); |
| 4316 | |
| 4317 | INIT_LIST_HEAD(&probe_ent->node); |
| 4318 | probe_ent->dev = dev; |
| 4319 | |
| 4320 | probe_ent->sht = port->sht; |
| 4321 | probe_ent->host_flags = port->host_flags; |
| 4322 | probe_ent->pio_mask = port->pio_mask; |
| 4323 | probe_ent->mwdma_mask = port->mwdma_mask; |
| 4324 | probe_ent->udma_mask = port->udma_mask; |
| 4325 | probe_ent->port_ops = port->port_ops; |
| 4326 | |
| 4327 | return probe_ent; |
| 4328 | } |
| 4329 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4330 | |
| 4331 | |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 4332 | #ifdef CONFIG_PCI |
| 4333 | |
| 4334 | void ata_pci_host_stop (struct ata_host_set *host_set) |
| 4335 | { |
| 4336 | struct pci_dev *pdev = to_pci_dev(host_set->dev); |
| 4337 | |
| 4338 | pci_iounmap(pdev, host_set->mmio_base); |
| 4339 | } |
| 4340 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4341 | /** |
| 4342 | * ata_pci_init_native_mode - Initialize native-mode driver |
| 4343 | * @pdev: pci device to be initialized |
| 4344 | * @port: array[2] of pointers to port info structures. |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4345 | * @ports: bitmap of ports present |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4346 | * |
| 4347 | * Utility function which allocates and initializes an |
| 4348 | * ata_probe_ent structure for a standard dual-port |
| 4349 | * PIO-based IDE controller. The returned ata_probe_ent |
| 4350 | * structure can be passed to ata_device_add(). The returned |
| 4351 | * ata_probe_ent structure should then be freed with kfree(). |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4352 | * |
| 4353 | * The caller need only pass the address of the primary port, the |
| 4354 | * secondary will be deduced automatically. If the device has non |
| 4355 | * standard secondary port mappings this function can be called twice, |
| 4356 | * once for each interface. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4357 | */ |
| 4358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4359 | struct ata_probe_ent * |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4360 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4361 | { |
| 4362 | struct ata_probe_ent *probe_ent = |
| 4363 | ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4364 | int p = 0; |
| 4365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4366 | if (!probe_ent) |
| 4367 | return NULL; |
| 4368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4369 | probe_ent->irq = pdev->irq; |
| 4370 | probe_ent->irq_flags = SA_SHIRQ; |
| 4371 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4372 | if (ports & ATA_PORT_PRIMARY) { |
| 4373 | probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0); |
| 4374 | probe_ent->port[p].altstatus_addr = |
| 4375 | probe_ent->port[p].ctl_addr = |
| 4376 | pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS; |
| 4377 | probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4); |
| 4378 | ata_std_ports(&probe_ent->port[p]); |
| 4379 | p++; |
| 4380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4381 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4382 | if (ports & ATA_PORT_SECONDARY) { |
| 4383 | probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2); |
| 4384 | probe_ent->port[p].altstatus_addr = |
| 4385 | probe_ent->port[p].ctl_addr = |
| 4386 | pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS; |
| 4387 | probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8; |
| 4388 | ata_std_ports(&probe_ent->port[p]); |
| 4389 | p++; |
| 4390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4391 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4392 | probe_ent->n_ports = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4393 | return probe_ent; |
| 4394 | } |
| 4395 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4396 | static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info **port, int port_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4397 | { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4398 | struct ata_probe_ent *probe_ent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4399 | |
| 4400 | probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); |
| 4401 | if (!probe_ent) |
| 4402 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4403 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4405 | probe_ent->legacy_mode = 1; |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4406 | probe_ent->n_ports = 1; |
| 4407 | probe_ent->hard_port_no = port_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4408 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4409 | switch(port_num) |
| 4410 | { |
| 4411 | case 0: |
| 4412 | probe_ent->irq = 14; |
| 4413 | probe_ent->port[0].cmd_addr = 0x1f0; |
| 4414 | probe_ent->port[0].altstatus_addr = |
| 4415 | probe_ent->port[0].ctl_addr = 0x3f6; |
| 4416 | break; |
| 4417 | case 1: |
| 4418 | probe_ent->irq = 15; |
| 4419 | probe_ent->port[0].cmd_addr = 0x170; |
| 4420 | probe_ent->port[0].altstatus_addr = |
| 4421 | probe_ent->port[0].ctl_addr = 0x376; |
| 4422 | break; |
| 4423 | } |
| 4424 | probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4425 | ata_std_ports(&probe_ent->port[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4426 | return probe_ent; |
| 4427 | } |
| 4428 | |
| 4429 | /** |
| 4430 | * ata_pci_init_one - Initialize/register PCI IDE host controller |
| 4431 | * @pdev: Controller to be initialized |
| 4432 | * @port_info: Information from low-level host driver |
| 4433 | * @n_ports: Number of ports attached to host controller |
| 4434 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4435 | * This is a helper function which can be called from a driver's |
| 4436 | * xxx_init_one() probe function if the hardware uses traditional |
| 4437 | * IDE taskfile registers. |
| 4438 | * |
| 4439 | * This function calls pci_enable_device(), reserves its register |
| 4440 | * regions, sets the dma mask, enables bus master mode, and calls |
| 4441 | * ata_device_add() |
| 4442 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4443 | * LOCKING: |
| 4444 | * Inherited from PCI layer (may sleep). |
| 4445 | * |
| 4446 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4447 | * Zero on success, negative on errno-based value on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4448 | * |
| 4449 | */ |
| 4450 | |
| 4451 | int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, |
| 4452 | unsigned int n_ports) |
| 4453 | { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4454 | struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4455 | struct ata_port_info *port[2]; |
| 4456 | u8 tmp8, mask; |
| 4457 | unsigned int legacy_mode = 0; |
| 4458 | int disable_dev_on_err = 1; |
| 4459 | int rc; |
| 4460 | |
| 4461 | DPRINTK("ENTER\n"); |
| 4462 | |
| 4463 | port[0] = port_info[0]; |
| 4464 | if (n_ports > 1) |
| 4465 | port[1] = port_info[1]; |
| 4466 | else |
| 4467 | port[1] = port[0]; |
| 4468 | |
| 4469 | if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0 |
| 4470 | && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4471 | /* TODO: What if one channel is in native mode ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); |
| 4473 | mask = (1 << 2) | (1 << 0); |
| 4474 | if ((tmp8 & mask) != mask) |
| 4475 | legacy_mode = (1 << 3); |
| 4476 | } |
| 4477 | |
| 4478 | /* FIXME... */ |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4479 | if ((!legacy_mode) && (n_ports > 2)) { |
| 4480 | printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n"); |
| 4481 | n_ports = 2; |
| 4482 | /* For now */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4483 | } |
| 4484 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4485 | /* FIXME: Really for ATA it isn't safe because the device may be |
| 4486 | multi-purpose and we want to leave it alone if it was already |
| 4487 | enabled. Secondly for shared use as Arjan says we want refcounting |
| 4488 | |
| 4489 | Checking dev->is_enabled is insufficient as this is not set at |
| 4490 | boot for the primary video which is BIOS enabled |
| 4491 | */ |
| 4492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4493 | rc = pci_enable_device(pdev); |
| 4494 | if (rc) |
| 4495 | return rc; |
| 4496 | |
| 4497 | rc = pci_request_regions(pdev, DRV_NAME); |
| 4498 | if (rc) { |
| 4499 | disable_dev_on_err = 0; |
| 4500 | goto err_out; |
| 4501 | } |
| 4502 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4503 | /* FIXME: Should use platform specific mappers for legacy port ranges */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4504 | if (legacy_mode) { |
| 4505 | if (!request_region(0x1f0, 8, "libata")) { |
| 4506 | struct resource *conflict, res; |
| 4507 | res.start = 0x1f0; |
| 4508 | res.end = 0x1f0 + 8 - 1; |
| 4509 | conflict = ____request_resource(&ioport_resource, &res); |
| 4510 | if (!strcmp(conflict->name, "libata")) |
| 4511 | legacy_mode |= (1 << 0); |
| 4512 | else { |
| 4513 | disable_dev_on_err = 0; |
| 4514 | printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n"); |
| 4515 | } |
| 4516 | } else |
| 4517 | legacy_mode |= (1 << 0); |
| 4518 | |
| 4519 | if (!request_region(0x170, 8, "libata")) { |
| 4520 | struct resource *conflict, res; |
| 4521 | res.start = 0x170; |
| 4522 | res.end = 0x170 + 8 - 1; |
| 4523 | conflict = ____request_resource(&ioport_resource, &res); |
| 4524 | if (!strcmp(conflict->name, "libata")) |
| 4525 | legacy_mode |= (1 << 1); |
| 4526 | else { |
| 4527 | disable_dev_on_err = 0; |
| 4528 | printk(KERN_WARNING "ata: 0x170 IDE port busy\n"); |
| 4529 | } |
| 4530 | } else |
| 4531 | legacy_mode |= (1 << 1); |
| 4532 | } |
| 4533 | |
| 4534 | /* we have legacy mode, but all ports are unavailable */ |
| 4535 | if (legacy_mode == (1 << 3)) { |
| 4536 | rc = -EBUSY; |
| 4537 | goto err_out_regions; |
| 4538 | } |
| 4539 | |
| 4540 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 4541 | if (rc) |
| 4542 | goto err_out_regions; |
| 4543 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 4544 | if (rc) |
| 4545 | goto err_out_regions; |
| 4546 | |
| 4547 | if (legacy_mode) { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 4548 | if (legacy_mode & (1 << 0)) |
| 4549 | probe_ent = ata_pci_init_legacy_port(pdev, port, 0); |
| 4550 | if (legacy_mode & (1 << 1)) |
| 4551 | probe_ent2 = ata_pci_init_legacy_port(pdev, port, 1); |
| 4552 | } else { |
| 4553 | if (n_ports == 2) |
| 4554 | probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); |
| 4555 | else |
| 4556 | probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY); |
| 4557 | } |
| 4558 | if (!probe_ent && !probe_ent2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4559 | rc = -ENOMEM; |
| 4560 | goto err_out_regions; |
| 4561 | } |
| 4562 | |
| 4563 | pci_set_master(pdev); |
| 4564 | |
| 4565 | /* FIXME: check ata_device_add return */ |
| 4566 | if (legacy_mode) { |
| 4567 | if (legacy_mode & (1 << 0)) |
| 4568 | ata_device_add(probe_ent); |
| 4569 | if (legacy_mode & (1 << 1)) |
| 4570 | ata_device_add(probe_ent2); |
| 4571 | } else |
| 4572 | ata_device_add(probe_ent); |
| 4573 | |
| 4574 | kfree(probe_ent); |
| 4575 | kfree(probe_ent2); |
| 4576 | |
| 4577 | return 0; |
| 4578 | |
| 4579 | err_out_regions: |
| 4580 | if (legacy_mode & (1 << 0)) |
| 4581 | release_region(0x1f0, 8); |
| 4582 | if (legacy_mode & (1 << 1)) |
| 4583 | release_region(0x170, 8); |
| 4584 | pci_release_regions(pdev); |
| 4585 | err_out: |
| 4586 | if (disable_dev_on_err) |
| 4587 | pci_disable_device(pdev); |
| 4588 | return rc; |
| 4589 | } |
| 4590 | |
| 4591 | /** |
| 4592 | * ata_pci_remove_one - PCI layer callback for device removal |
| 4593 | * @pdev: PCI device that was removed |
| 4594 | * |
| 4595 | * PCI layer indicates to libata via this hook that |
| 4596 | * hot-unplug or module unload event has occured. |
| 4597 | * Handle this by unregistering all objects associated |
| 4598 | * with this PCI device. Free those objects. Then finally |
| 4599 | * release PCI resources and disable device. |
| 4600 | * |
| 4601 | * LOCKING: |
| 4602 | * Inherited from PCI layer (may sleep). |
| 4603 | */ |
| 4604 | |
| 4605 | void ata_pci_remove_one (struct pci_dev *pdev) |
| 4606 | { |
| 4607 | struct device *dev = pci_dev_to_dev(pdev); |
| 4608 | struct ata_host_set *host_set = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4609 | |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 4610 | ata_host_set_remove(host_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4611 | pci_release_regions(pdev); |
| 4612 | pci_disable_device(pdev); |
| 4613 | dev_set_drvdata(dev, NULL); |
| 4614 | } |
| 4615 | |
| 4616 | /* move to PCI subsystem */ |
| 4617 | int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits) |
| 4618 | { |
| 4619 | unsigned long tmp = 0; |
| 4620 | |
| 4621 | switch (bits->width) { |
| 4622 | case 1: { |
| 4623 | u8 tmp8 = 0; |
| 4624 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 4625 | tmp = tmp8; |
| 4626 | break; |
| 4627 | } |
| 4628 | case 2: { |
| 4629 | u16 tmp16 = 0; |
| 4630 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 4631 | tmp = tmp16; |
| 4632 | break; |
| 4633 | } |
| 4634 | case 4: { |
| 4635 | u32 tmp32 = 0; |
| 4636 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 4637 | tmp = tmp32; |
| 4638 | break; |
| 4639 | } |
| 4640 | |
| 4641 | default: |
| 4642 | return -EINVAL; |
| 4643 | } |
| 4644 | |
| 4645 | tmp &= bits->mask; |
| 4646 | |
| 4647 | return (tmp == bits->val) ? 1 : 0; |
| 4648 | } |
| 4649 | #endif /* CONFIG_PCI */ |
| 4650 | |
| 4651 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4652 | static int __init ata_init(void) |
| 4653 | { |
| 4654 | ata_wq = create_workqueue("ata"); |
| 4655 | if (!ata_wq) |
| 4656 | return -ENOMEM; |
| 4657 | |
| 4658 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 4659 | return 0; |
| 4660 | } |
| 4661 | |
| 4662 | static void __exit ata_exit(void) |
| 4663 | { |
| 4664 | destroy_workqueue(ata_wq); |
| 4665 | } |
| 4666 | |
| 4667 | module_init(ata_init); |
| 4668 | module_exit(ata_exit); |
| 4669 | |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 4670 | static unsigned long ratelimit_time; |
| 4671 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; |
| 4672 | |
| 4673 | int ata_ratelimit(void) |
| 4674 | { |
| 4675 | int rc; |
| 4676 | unsigned long flags; |
| 4677 | |
| 4678 | spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| 4679 | |
| 4680 | if (time_after(jiffies, ratelimit_time)) { |
| 4681 | rc = 1; |
| 4682 | ratelimit_time = jiffies + (HZ/5); |
| 4683 | } else |
| 4684 | rc = 0; |
| 4685 | |
| 4686 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| 4687 | |
| 4688 | return rc; |
| 4689 | } |
| 4690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4691 | /* |
| 4692 | * libata is essentially a library of internal helper functions for |
| 4693 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 4694 | * likely to change as new drivers are added and updated. |
| 4695 | * Do not depend on ABI/API stability. |
| 4696 | */ |
| 4697 | |
| 4698 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 4699 | EXPORT_SYMBOL_GPL(ata_std_ports); |
| 4700 | EXPORT_SYMBOL_GPL(ata_device_add); |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 4701 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4702 | EXPORT_SYMBOL_GPL(ata_sg_init); |
| 4703 | EXPORT_SYMBOL_GPL(ata_sg_init_one); |
| 4704 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
| 4705 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
| 4706 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
| 4707 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 4708 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 4709 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 4710 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
| 4711 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 4712 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| 4713 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 4714 | EXPORT_SYMBOL_GPL(ata_altstatus); |
| 4715 | EXPORT_SYMBOL_GPL(ata_chk_err); |
| 4716 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 4717 | EXPORT_SYMBOL_GPL(ata_port_start); |
| 4718 | EXPORT_SYMBOL_GPL(ata_port_stop); |
Jeff Garzik | aa8f0dc | 2005-05-26 21:54:27 -0400 | [diff] [blame] | 4719 | EXPORT_SYMBOL_GPL(ata_host_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4720 | EXPORT_SYMBOL_GPL(ata_interrupt); |
| 4721 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
| 4722 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 4723 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 4724 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 4725 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 4726 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
| 4727 | EXPORT_SYMBOL_GPL(ata_port_probe); |
| 4728 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
| 4729 | EXPORT_SYMBOL_GPL(__sata_phy_reset); |
| 4730 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
| 4731 | EXPORT_SYMBOL_GPL(ata_port_disable); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 4732 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4733 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 4734 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
| 4735 | EXPORT_SYMBOL_GPL(ata_scsi_error); |
| 4736 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
| 4737 | EXPORT_SYMBOL_GPL(ata_scsi_release); |
| 4738 | EXPORT_SYMBOL_GPL(ata_host_intr); |
| 4739 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 4740 | EXPORT_SYMBOL_GPL(ata_dev_id_string); |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 4741 | EXPORT_SYMBOL_GPL(ata_dev_config); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4742 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| 4743 | |
| 4744 | #ifdef CONFIG_PCI |
| 4745 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 4746 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4747 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
| 4748 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 4749 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
| 4750 | #endif /* CONFIG_PCI */ |