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> |
David Hardeman | 378f058 | 2005-09-17 17:55:31 +1000 | [diff] [blame] | 52 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <scsi/scsi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #include "scsi_priv.h" |
Jeff Garzik | 193515d | 2005-11-07 00:59:37 -0500 | [diff] [blame] | 55 | #include <scsi/scsi_cmnd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include <scsi/scsi_host.h> |
| 57 | #include <linux/libata.h> |
| 58 | #include <asm/io.h> |
| 59 | #include <asm/semaphore.h> |
| 60 | #include <asm/byteorder.h> |
| 61 | |
| 62 | #include "libata.h" |
| 63 | |
| 64 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 65 | unsigned long tmout_pat, |
| 66 | unsigned long tmout); |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 67 | 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] | 68 | 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] | 69 | static void ata_set_mode(struct ata_port *ap); |
| 70 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 71 | static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static int fgb(u32 bitmap); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 73 | static int ata_choose_xfer_mode(const struct ata_port *ap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | u8 *xfer_mode_out, |
| 75 | unsigned int *xfer_shift_out); |
Jeff Garzik | e33b9df | 2005-10-09 09:51:46 -0400 | [diff] [blame] | 76 | static void ata_pio_error(struct ata_port *ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | static unsigned int ata_unique_id = 1; |
| 79 | static struct workqueue_struct *ata_wq; |
| 80 | |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 81 | int atapi_enabled = 0; |
| 82 | module_param(atapi_enabled, int, 0444); |
| 83 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | MODULE_AUTHOR("Jeff Garzik"); |
| 86 | MODULE_DESCRIPTION("Library module for ATA devices"); |
| 87 | MODULE_LICENSE("GPL"); |
| 88 | MODULE_VERSION(DRV_VERSION); |
| 89 | |
| 90 | /** |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 91 | * ata_tf_load_pio - send taskfile registers to host controller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | * @ap: Port to which output is sent |
| 93 | * @tf: ATA taskfile register set |
| 94 | * |
| 95 | * Outputs ATA taskfile to standard ATA host controller. |
| 96 | * |
| 97 | * LOCKING: |
| 98 | * Inherited from caller. |
| 99 | */ |
| 100 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 101 | static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | { |
| 103 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 104 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 105 | |
| 106 | if (tf->ctl != ap->last_ctl) { |
| 107 | outb(tf->ctl, ioaddr->ctl_addr); |
| 108 | ap->last_ctl = tf->ctl; |
| 109 | ata_wait_idle(ap); |
| 110 | } |
| 111 | |
| 112 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 113 | outb(tf->hob_feature, ioaddr->feature_addr); |
| 114 | outb(tf->hob_nsect, ioaddr->nsect_addr); |
| 115 | outb(tf->hob_lbal, ioaddr->lbal_addr); |
| 116 | outb(tf->hob_lbam, ioaddr->lbam_addr); |
| 117 | outb(tf->hob_lbah, ioaddr->lbah_addr); |
| 118 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 119 | tf->hob_feature, |
| 120 | tf->hob_nsect, |
| 121 | tf->hob_lbal, |
| 122 | tf->hob_lbam, |
| 123 | tf->hob_lbah); |
| 124 | } |
| 125 | |
| 126 | if (is_addr) { |
| 127 | outb(tf->feature, ioaddr->feature_addr); |
| 128 | outb(tf->nsect, ioaddr->nsect_addr); |
| 129 | outb(tf->lbal, ioaddr->lbal_addr); |
| 130 | outb(tf->lbam, ioaddr->lbam_addr); |
| 131 | outb(tf->lbah, ioaddr->lbah_addr); |
| 132 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 133 | tf->feature, |
| 134 | tf->nsect, |
| 135 | tf->lbal, |
| 136 | tf->lbam, |
| 137 | tf->lbah); |
| 138 | } |
| 139 | |
| 140 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 141 | outb(tf->device, ioaddr->device_addr); |
| 142 | VPRINTK("device 0x%X\n", tf->device); |
| 143 | } |
| 144 | |
| 145 | ata_wait_idle(ap); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * ata_tf_load_mmio - send taskfile registers to host controller |
| 150 | * @ap: Port to which output is sent |
| 151 | * @tf: ATA taskfile register set |
| 152 | * |
| 153 | * Outputs ATA taskfile to standard ATA host controller using MMIO. |
| 154 | * |
| 155 | * LOCKING: |
| 156 | * Inherited from caller. |
| 157 | */ |
| 158 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 159 | static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
| 161 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 162 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 163 | |
| 164 | if (tf->ctl != ap->last_ctl) { |
| 165 | writeb(tf->ctl, (void __iomem *) ap->ioaddr.ctl_addr); |
| 166 | ap->last_ctl = tf->ctl; |
| 167 | ata_wait_idle(ap); |
| 168 | } |
| 169 | |
| 170 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
| 171 | writeb(tf->hob_feature, (void __iomem *) ioaddr->feature_addr); |
| 172 | writeb(tf->hob_nsect, (void __iomem *) ioaddr->nsect_addr); |
| 173 | writeb(tf->hob_lbal, (void __iomem *) ioaddr->lbal_addr); |
| 174 | writeb(tf->hob_lbam, (void __iomem *) ioaddr->lbam_addr); |
| 175 | writeb(tf->hob_lbah, (void __iomem *) ioaddr->lbah_addr); |
| 176 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 177 | tf->hob_feature, |
| 178 | tf->hob_nsect, |
| 179 | tf->hob_lbal, |
| 180 | tf->hob_lbam, |
| 181 | tf->hob_lbah); |
| 182 | } |
| 183 | |
| 184 | if (is_addr) { |
| 185 | writeb(tf->feature, (void __iomem *) ioaddr->feature_addr); |
| 186 | writeb(tf->nsect, (void __iomem *) ioaddr->nsect_addr); |
| 187 | writeb(tf->lbal, (void __iomem *) ioaddr->lbal_addr); |
| 188 | writeb(tf->lbam, (void __iomem *) ioaddr->lbam_addr); |
| 189 | writeb(tf->lbah, (void __iomem *) ioaddr->lbah_addr); |
| 190 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 191 | tf->feature, |
| 192 | tf->nsect, |
| 193 | tf->lbal, |
| 194 | tf->lbam, |
| 195 | tf->lbah); |
| 196 | } |
| 197 | |
| 198 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 199 | writeb(tf->device, (void __iomem *) ioaddr->device_addr); |
| 200 | VPRINTK("device 0x%X\n", tf->device); |
| 201 | } |
| 202 | |
| 203 | ata_wait_idle(ap); |
| 204 | } |
| 205 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 206 | |
| 207 | /** |
| 208 | * ata_tf_load - send taskfile registers to host controller |
| 209 | * @ap: Port to which output is sent |
| 210 | * @tf: ATA taskfile register set |
| 211 | * |
| 212 | * Outputs ATA taskfile to standard ATA host controller using MMIO |
| 213 | * or PIO as indicated by the ATA_FLAG_MMIO flag. |
| 214 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
| 215 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
| 216 | * hob_lbal, hob_lbam, and hob_lbah. |
| 217 | * |
| 218 | * This function waits for idle (!BUSY and !DRQ) after writing |
| 219 | * registers. If the control register has a new value, this |
| 220 | * function also waits for idle after writing control and before |
| 221 | * writing the remaining registers. |
| 222 | * |
| 223 | * May be used as the tf_load() entry in ata_port_operations. |
| 224 | * |
| 225 | * LOCKING: |
| 226 | * Inherited from caller. |
| 227 | */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 228 | void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | if (ap->flags & ATA_FLAG_MMIO) |
| 231 | ata_tf_load_mmio(ap, tf); |
| 232 | else |
| 233 | ata_tf_load_pio(ap, tf); |
| 234 | } |
| 235 | |
| 236 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 237 | * ata_exec_command_pio - issue ATA command to host controller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | * @ap: port to which command is being issued |
| 239 | * @tf: ATA taskfile register set |
| 240 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 241 | * Issues PIO write to ATA command register, with proper |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | * synchronization with interrupt handler / other threads. |
| 243 | * |
| 244 | * LOCKING: |
| 245 | * spin_lock_irqsave(host_set lock) |
| 246 | */ |
| 247 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 248 | static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | { |
| 250 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 251 | |
| 252 | outb(tf->command, ap->ioaddr.command_addr); |
| 253 | ata_pause(ap); |
| 254 | } |
| 255 | |
| 256 | |
| 257 | /** |
| 258 | * ata_exec_command_mmio - issue ATA command to host controller |
| 259 | * @ap: port to which command is being issued |
| 260 | * @tf: ATA taskfile register set |
| 261 | * |
| 262 | * Issues MMIO write to ATA command register, with proper |
| 263 | * synchronization with interrupt handler / other threads. |
| 264 | * |
| 265 | * LOCKING: |
| 266 | * spin_lock_irqsave(host_set lock) |
| 267 | */ |
| 268 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 269 | static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
| 271 | DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); |
| 272 | |
| 273 | writeb(tf->command, (void __iomem *) ap->ioaddr.command_addr); |
| 274 | ata_pause(ap); |
| 275 | } |
| 276 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 277 | |
| 278 | /** |
| 279 | * ata_exec_command - issue ATA command to host controller |
| 280 | * @ap: port to which command is being issued |
| 281 | * @tf: ATA taskfile register set |
| 282 | * |
| 283 | * Issues PIO/MMIO write to ATA command register, with proper |
| 284 | * synchronization with interrupt handler / other threads. |
| 285 | * |
| 286 | * LOCKING: |
| 287 | * spin_lock_irqsave(host_set lock) |
| 288 | */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 289 | void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | { |
| 291 | if (ap->flags & ATA_FLAG_MMIO) |
| 292 | ata_exec_command_mmio(ap, tf); |
| 293 | else |
| 294 | ata_exec_command_pio(ap, tf); |
| 295 | } |
| 296 | |
| 297 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 299 | * @ap: port to which command is being issued |
| 300 | * @tf: ATA taskfile register set |
| 301 | * |
| 302 | * Issues ATA taskfile register set to ATA host controller, |
| 303 | * with proper synchronization with interrupt handler and |
| 304 | * other threads. |
| 305 | * |
| 306 | * LOCKING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | * spin_lock_irqsave(host_set lock) |
| 308 | */ |
| 309 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 310 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 311 | const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
| 313 | ap->ops->tf_load(ap, tf); |
| 314 | ap->ops->exec_command(ap, tf); |
| 315 | } |
| 316 | |
| 317 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 318 | * ata_tf_read_pio - input device's ATA taskfile shadow registers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | * @ap: Port from which input is read |
| 320 | * @tf: ATA taskfile register set for storing input |
| 321 | * |
| 322 | * Reads ATA taskfile registers for currently-selected device |
| 323 | * into @tf. |
| 324 | * |
| 325 | * LOCKING: |
| 326 | * Inherited from caller. |
| 327 | */ |
| 328 | |
| 329 | static void ata_tf_read_pio(struct ata_port *ap, struct ata_taskfile *tf) |
| 330 | { |
| 331 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 332 | |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 333 | tf->command = ata_check_status(ap); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 334 | tf->feature = inb(ioaddr->error_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | tf->nsect = inb(ioaddr->nsect_addr); |
| 336 | tf->lbal = inb(ioaddr->lbal_addr); |
| 337 | tf->lbam = inb(ioaddr->lbam_addr); |
| 338 | tf->lbah = inb(ioaddr->lbah_addr); |
| 339 | tf->device = inb(ioaddr->device_addr); |
| 340 | |
| 341 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 342 | outb(tf->ctl | ATA_HOB, ioaddr->ctl_addr); |
| 343 | tf->hob_feature = inb(ioaddr->error_addr); |
| 344 | tf->hob_nsect = inb(ioaddr->nsect_addr); |
| 345 | tf->hob_lbal = inb(ioaddr->lbal_addr); |
| 346 | tf->hob_lbam = inb(ioaddr->lbam_addr); |
| 347 | tf->hob_lbah = inb(ioaddr->lbah_addr); |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * ata_tf_read_mmio - input device's ATA taskfile shadow registers |
| 353 | * @ap: Port from which input is read |
| 354 | * @tf: ATA taskfile register set for storing input |
| 355 | * |
| 356 | * Reads ATA taskfile registers for currently-selected device |
| 357 | * into @tf via MMIO. |
| 358 | * |
| 359 | * LOCKING: |
| 360 | * Inherited from caller. |
| 361 | */ |
| 362 | |
| 363 | static void ata_tf_read_mmio(struct ata_port *ap, struct ata_taskfile *tf) |
| 364 | { |
| 365 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 366 | |
Jeff Garzik | ac19bff | 2005-10-29 13:58:21 -0400 | [diff] [blame] | 367 | tf->command = ata_check_status(ap); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 368 | tf->feature = readb((void __iomem *)ioaddr->error_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | tf->nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 370 | tf->lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 371 | tf->lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 372 | tf->lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 373 | tf->device = readb((void __iomem *)ioaddr->device_addr); |
| 374 | |
| 375 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 376 | writeb(tf->ctl | ATA_HOB, (void __iomem *) ap->ioaddr.ctl_addr); |
| 377 | tf->hob_feature = readb((void __iomem *)ioaddr->error_addr); |
| 378 | tf->hob_nsect = readb((void __iomem *)ioaddr->nsect_addr); |
| 379 | tf->hob_lbal = readb((void __iomem *)ioaddr->lbal_addr); |
| 380 | tf->hob_lbam = readb((void __iomem *)ioaddr->lbam_addr); |
| 381 | tf->hob_lbah = readb((void __iomem *)ioaddr->lbah_addr); |
| 382 | } |
| 383 | } |
| 384 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 385 | |
| 386 | /** |
| 387 | * ata_tf_read - input device's ATA taskfile shadow registers |
| 388 | * @ap: Port from which input is read |
| 389 | * @tf: ATA taskfile register set for storing input |
| 390 | * |
| 391 | * Reads ATA taskfile registers for currently-selected device |
| 392 | * into @tf. |
| 393 | * |
| 394 | * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48 |
| 395 | * is set, also reads the hob registers. |
| 396 | * |
| 397 | * May be used as the tf_read() entry in ata_port_operations. |
| 398 | * |
| 399 | * LOCKING: |
| 400 | * Inherited from caller. |
| 401 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
| 403 | { |
| 404 | if (ap->flags & ATA_FLAG_MMIO) |
| 405 | ata_tf_read_mmio(ap, tf); |
| 406 | else |
| 407 | ata_tf_read_pio(ap, tf); |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * ata_check_status_pio - Read device status reg & clear interrupt |
| 412 | * @ap: port where the device is |
| 413 | * |
| 414 | * Reads ATA taskfile status register for currently-selected device |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 415 | * and return its value. This also clears pending interrupts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | * from this device |
| 417 | * |
| 418 | * LOCKING: |
| 419 | * Inherited from caller. |
| 420 | */ |
| 421 | static u8 ata_check_status_pio(struct ata_port *ap) |
| 422 | { |
| 423 | return inb(ap->ioaddr.status_addr); |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * ata_check_status_mmio - Read device status reg & clear interrupt |
| 428 | * @ap: port where the device is |
| 429 | * |
| 430 | * Reads ATA taskfile status register for currently-selected device |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 431 | * via MMIO and return its value. This also clears pending interrupts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | * from this device |
| 433 | * |
| 434 | * LOCKING: |
| 435 | * Inherited from caller. |
| 436 | */ |
| 437 | static u8 ata_check_status_mmio(struct ata_port *ap) |
| 438 | { |
| 439 | return readb((void __iomem *) ap->ioaddr.status_addr); |
| 440 | } |
| 441 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 442 | |
| 443 | /** |
| 444 | * ata_check_status - Read device status reg & clear interrupt |
| 445 | * @ap: port where the device is |
| 446 | * |
| 447 | * Reads ATA taskfile status register for currently-selected device |
| 448 | * and return its value. This also clears pending interrupts |
| 449 | * from this device |
| 450 | * |
| 451 | * May be used as the check_status() entry in ata_port_operations. |
| 452 | * |
| 453 | * LOCKING: |
| 454 | * Inherited from caller. |
| 455 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | u8 ata_check_status(struct ata_port *ap) |
| 457 | { |
| 458 | if (ap->flags & ATA_FLAG_MMIO) |
| 459 | return ata_check_status_mmio(ap); |
| 460 | return ata_check_status_pio(ap); |
| 461 | } |
| 462 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 463 | |
| 464 | /** |
| 465 | * ata_altstatus - Read device alternate status reg |
| 466 | * @ap: port where the device is |
| 467 | * |
| 468 | * Reads ATA taskfile alternate status register for |
| 469 | * currently-selected device and return its value. |
| 470 | * |
| 471 | * Note: may NOT be used as the check_altstatus() entry in |
| 472 | * ata_port_operations. |
| 473 | * |
| 474 | * LOCKING: |
| 475 | * Inherited from caller. |
| 476 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | u8 ata_altstatus(struct ata_port *ap) |
| 478 | { |
| 479 | if (ap->ops->check_altstatus) |
| 480 | return ap->ops->check_altstatus(ap); |
| 481 | |
| 482 | if (ap->flags & ATA_FLAG_MMIO) |
| 483 | return readb((void __iomem *)ap->ioaddr.altstatus_addr); |
| 484 | return inb(ap->ioaddr.altstatus_addr); |
| 485 | } |
| 486 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 487 | |
| 488 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| 490 | * @tf: Taskfile to convert |
| 491 | * @fis: Buffer into which data will output |
| 492 | * @pmp: Port multiplier port |
| 493 | * |
| 494 | * Converts a standard ATA taskfile to a Serial ATA |
| 495 | * FIS structure (Register - Host to Device). |
| 496 | * |
| 497 | * LOCKING: |
| 498 | * Inherited from caller. |
| 499 | */ |
| 500 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 501 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
| 503 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
| 504 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, |
| 505 | bit 7 indicates Command FIS */ |
| 506 | fis[2] = tf->command; |
| 507 | fis[3] = tf->feature; |
| 508 | |
| 509 | fis[4] = tf->lbal; |
| 510 | fis[5] = tf->lbam; |
| 511 | fis[6] = tf->lbah; |
| 512 | fis[7] = tf->device; |
| 513 | |
| 514 | fis[8] = tf->hob_lbal; |
| 515 | fis[9] = tf->hob_lbam; |
| 516 | fis[10] = tf->hob_lbah; |
| 517 | fis[11] = tf->hob_feature; |
| 518 | |
| 519 | fis[12] = tf->nsect; |
| 520 | fis[13] = tf->hob_nsect; |
| 521 | fis[14] = 0; |
| 522 | fis[15] = tf->ctl; |
| 523 | |
| 524 | fis[16] = 0; |
| 525 | fis[17] = 0; |
| 526 | fis[18] = 0; |
| 527 | fis[19] = 0; |
| 528 | } |
| 529 | |
| 530 | /** |
| 531 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| 532 | * @fis: Buffer from which data will be input |
| 533 | * @tf: Taskfile to output |
| 534 | * |
Mark Lord | e12a1be | 2005-11-12 18:55:45 -0500 | [diff] [blame] | 535 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | * |
| 537 | * LOCKING: |
| 538 | * Inherited from caller. |
| 539 | */ |
| 540 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 541 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
| 543 | tf->command = fis[2]; /* status */ |
| 544 | tf->feature = fis[3]; /* error */ |
| 545 | |
| 546 | tf->lbal = fis[4]; |
| 547 | tf->lbam = fis[5]; |
| 548 | tf->lbah = fis[6]; |
| 549 | tf->device = fis[7]; |
| 550 | |
| 551 | tf->hob_lbal = fis[8]; |
| 552 | tf->hob_lbam = fis[9]; |
| 553 | tf->hob_lbah = fis[10]; |
| 554 | |
| 555 | tf->nsect = fis[12]; |
| 556 | tf->hob_nsect = fis[13]; |
| 557 | } |
| 558 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 559 | static const u8 ata_rw_cmds[] = { |
| 560 | /* pio multi */ |
| 561 | ATA_CMD_READ_MULTI, |
| 562 | ATA_CMD_WRITE_MULTI, |
| 563 | ATA_CMD_READ_MULTI_EXT, |
| 564 | ATA_CMD_WRITE_MULTI_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 565 | 0, |
| 566 | 0, |
| 567 | 0, |
| 568 | ATA_CMD_WRITE_MULTI_FUA_EXT, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 569 | /* pio */ |
| 570 | ATA_CMD_PIO_READ, |
| 571 | ATA_CMD_PIO_WRITE, |
| 572 | ATA_CMD_PIO_READ_EXT, |
| 573 | ATA_CMD_PIO_WRITE_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 574 | 0, |
| 575 | 0, |
| 576 | 0, |
| 577 | 0, |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 578 | /* dma */ |
| 579 | ATA_CMD_READ, |
| 580 | ATA_CMD_WRITE, |
| 581 | ATA_CMD_READ_EXT, |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 582 | ATA_CMD_WRITE_EXT, |
| 583 | 0, |
| 584 | 0, |
| 585 | 0, |
| 586 | ATA_CMD_WRITE_FUA_EXT |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 587 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
| 589 | /** |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 590 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
| 591 | * @qc: command to examine and configure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | * |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 593 | * Examine the device configuration and tf->flags to calculate |
| 594 | * the proper read/write commands and protocol to use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | * |
| 596 | * LOCKING: |
| 597 | * caller. |
| 598 | */ |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 599 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | { |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 601 | struct ata_taskfile *tf = &qc->tf; |
| 602 | struct ata_device *dev = qc->dev; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 603 | u8 cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 605 | int index, fua, lba48, write; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 606 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 607 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 608 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| 609 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 611 | if (dev->flags & ATA_DFLAG_PIO) { |
| 612 | tf->protocol = ATA_PROT_PIO; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 613 | index = dev->multi_count ? 0 : 8; |
Alan Cox | 8d238e0 | 2006-01-17 20:50:31 +0000 | [diff] [blame] | 614 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
| 615 | /* Unable to use DMA due to host limitation */ |
| 616 | tf->protocol = ATA_PROT_PIO; |
| 617 | index = dev->multi_count ? 0 : 4; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 618 | } else { |
| 619 | tf->protocol = ATA_PROT_DMA; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 620 | index = 16; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 621 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 623 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| 624 | if (cmd) { |
| 625 | tf->command = cmd; |
| 626 | return 0; |
| 627 | } |
| 628 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
| 630 | |
Arjan van de Ven | 98ac62d | 2005-11-28 10:06:23 +0100 | [diff] [blame] | 631 | static const char * const xfer_mode_str[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | "UDMA/16", |
| 633 | "UDMA/25", |
| 634 | "UDMA/33", |
| 635 | "UDMA/44", |
| 636 | "UDMA/66", |
| 637 | "UDMA/100", |
| 638 | "UDMA/133", |
| 639 | "UDMA7", |
| 640 | "MWDMA0", |
| 641 | "MWDMA1", |
| 642 | "MWDMA2", |
| 643 | "PIO0", |
| 644 | "PIO1", |
| 645 | "PIO2", |
| 646 | "PIO3", |
| 647 | "PIO4", |
| 648 | }; |
| 649 | |
| 650 | /** |
| 651 | * ata_udma_string - convert UDMA bit offset to string |
| 652 | * @mask: mask of bits supported; only highest bit counts. |
| 653 | * |
| 654 | * Determine string which represents the highest speed |
| 655 | * (highest bit in @udma_mask). |
| 656 | * |
| 657 | * LOCKING: |
| 658 | * None. |
| 659 | * |
| 660 | * RETURNS: |
| 661 | * Constant C string representing highest speed listed in |
| 662 | * @udma_mask, or the constant C string "<n/a>". |
| 663 | */ |
| 664 | |
| 665 | static const char *ata_mode_string(unsigned int mask) |
| 666 | { |
| 667 | int i; |
| 668 | |
| 669 | for (i = 7; i >= 0; i--) |
| 670 | if (mask & (1 << i)) |
| 671 | goto out; |
| 672 | for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--) |
| 673 | if (mask & (1 << i)) |
| 674 | goto out; |
| 675 | for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--) |
| 676 | if (mask & (1 << i)) |
| 677 | goto out; |
| 678 | |
| 679 | return "<n/a>"; |
| 680 | |
| 681 | out: |
| 682 | return xfer_mode_str[i]; |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * ata_pio_devchk - PATA device presence detection |
| 687 | * @ap: ATA channel to examine |
| 688 | * @device: Device to examine (starting at zero) |
| 689 | * |
| 690 | * This technique was originally described in |
| 691 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 692 | * later found its way into the ATA/ATAPI spec. |
| 693 | * |
| 694 | * Write a pattern to the ATA shadow registers, |
| 695 | * and if a device is present, it will respond by |
| 696 | * correctly storing and echoing back the |
| 697 | * ATA shadow register contents. |
| 698 | * |
| 699 | * LOCKING: |
| 700 | * caller. |
| 701 | */ |
| 702 | |
| 703 | static unsigned int ata_pio_devchk(struct ata_port *ap, |
| 704 | unsigned int device) |
| 705 | { |
| 706 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 707 | u8 nsect, lbal; |
| 708 | |
| 709 | ap->ops->dev_select(ap, device); |
| 710 | |
| 711 | outb(0x55, ioaddr->nsect_addr); |
| 712 | outb(0xaa, ioaddr->lbal_addr); |
| 713 | |
| 714 | outb(0xaa, ioaddr->nsect_addr); |
| 715 | outb(0x55, ioaddr->lbal_addr); |
| 716 | |
| 717 | outb(0x55, ioaddr->nsect_addr); |
| 718 | outb(0xaa, ioaddr->lbal_addr); |
| 719 | |
| 720 | nsect = inb(ioaddr->nsect_addr); |
| 721 | lbal = inb(ioaddr->lbal_addr); |
| 722 | |
| 723 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 724 | return 1; /* we found a device */ |
| 725 | |
| 726 | return 0; /* nothing found */ |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * ata_mmio_devchk - PATA device presence detection |
| 731 | * @ap: ATA channel to examine |
| 732 | * @device: Device to examine (starting at zero) |
| 733 | * |
| 734 | * This technique was originally described in |
| 735 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 736 | * later found its way into the ATA/ATAPI spec. |
| 737 | * |
| 738 | * Write a pattern to the ATA shadow registers, |
| 739 | * and if a device is present, it will respond by |
| 740 | * correctly storing and echoing back the |
| 741 | * ATA shadow register contents. |
| 742 | * |
| 743 | * LOCKING: |
| 744 | * caller. |
| 745 | */ |
| 746 | |
| 747 | static unsigned int ata_mmio_devchk(struct ata_port *ap, |
| 748 | unsigned int device) |
| 749 | { |
| 750 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 751 | u8 nsect, lbal; |
| 752 | |
| 753 | ap->ops->dev_select(ap, device); |
| 754 | |
| 755 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 756 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 757 | |
| 758 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); |
| 759 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); |
| 760 | |
| 761 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); |
| 762 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); |
| 763 | |
| 764 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 765 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 766 | |
| 767 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 768 | return 1; /* we found a device */ |
| 769 | |
| 770 | return 0; /* nothing found */ |
| 771 | } |
| 772 | |
| 773 | /** |
| 774 | * ata_devchk - PATA device presence detection |
| 775 | * @ap: ATA channel to examine |
| 776 | * @device: Device to examine (starting at zero) |
| 777 | * |
| 778 | * Dispatch ATA device presence detection, depending |
| 779 | * on whether we are using PIO or MMIO to talk to the |
| 780 | * ATA shadow registers. |
| 781 | * |
| 782 | * LOCKING: |
| 783 | * caller. |
| 784 | */ |
| 785 | |
| 786 | static unsigned int ata_devchk(struct ata_port *ap, |
| 787 | unsigned int device) |
| 788 | { |
| 789 | if (ap->flags & ATA_FLAG_MMIO) |
| 790 | return ata_mmio_devchk(ap, device); |
| 791 | return ata_pio_devchk(ap, device); |
| 792 | } |
| 793 | |
| 794 | /** |
| 795 | * ata_dev_classify - determine device type based on ATA-spec signature |
| 796 | * @tf: ATA taskfile register set for device to be identified |
| 797 | * |
| 798 | * Determine from taskfile register contents whether a device is |
| 799 | * ATA or ATAPI, as per "Signature and persistence" section |
| 800 | * of ATA/PI spec (volume 1, sect 5.14). |
| 801 | * |
| 802 | * LOCKING: |
| 803 | * None. |
| 804 | * |
| 805 | * RETURNS: |
| 806 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN |
| 807 | * the event of failure. |
| 808 | */ |
| 809 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 810 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | { |
| 812 | /* Apple's open source Darwin code hints that some devices only |
| 813 | * put a proper signature into the LBA mid/high registers, |
| 814 | * So, we only check those. It's sufficient for uniqueness. |
| 815 | */ |
| 816 | |
| 817 | if (((tf->lbam == 0) && (tf->lbah == 0)) || |
| 818 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { |
| 819 | DPRINTK("found ATA device by sig\n"); |
| 820 | return ATA_DEV_ATA; |
| 821 | } |
| 822 | |
| 823 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || |
| 824 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { |
| 825 | DPRINTK("found ATAPI device by sig\n"); |
| 826 | return ATA_DEV_ATAPI; |
| 827 | } |
| 828 | |
| 829 | DPRINTK("unknown device\n"); |
| 830 | return ATA_DEV_UNKNOWN; |
| 831 | } |
| 832 | |
| 833 | /** |
| 834 | * ata_dev_try_classify - Parse returned ATA device signature |
| 835 | * @ap: ATA channel to examine |
| 836 | * @device: Device to examine (starting at zero) |
| 837 | * |
| 838 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 839 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 840 | * shadow registers, indicating the results of device detection |
| 841 | * and diagnostics. |
| 842 | * |
| 843 | * Select the ATA device, and read the values from the ATA shadow |
| 844 | * registers. Then parse according to the Error register value, |
| 845 | * and the spec-defined values examined by ata_dev_classify(). |
| 846 | * |
| 847 | * LOCKING: |
| 848 | * caller. |
| 849 | */ |
| 850 | |
| 851 | static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device) |
| 852 | { |
| 853 | struct ata_device *dev = &ap->device[device]; |
| 854 | struct ata_taskfile tf; |
| 855 | unsigned int class; |
| 856 | u8 err; |
| 857 | |
| 858 | ap->ops->dev_select(ap, device); |
| 859 | |
| 860 | memset(&tf, 0, sizeof(tf)); |
| 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | ap->ops->tf_read(ap, &tf); |
Jeff Garzik | 0169e28 | 2005-10-29 21:25:10 -0400 | [diff] [blame] | 863 | err = tf.feature; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
| 865 | dev->class = ATA_DEV_NONE; |
| 866 | |
| 867 | /* see if device passed diags */ |
| 868 | if (err == 1) |
| 869 | /* do nothing */ ; |
| 870 | else if ((device == 0) && (err == 0x81)) |
| 871 | /* do nothing */ ; |
| 872 | else |
| 873 | return err; |
| 874 | |
| 875 | /* determine if device if ATA or ATAPI */ |
| 876 | class = ata_dev_classify(&tf); |
| 877 | if (class == ATA_DEV_UNKNOWN) |
| 878 | return err; |
| 879 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
| 880 | return err; |
| 881 | |
| 882 | dev->class = class; |
| 883 | |
| 884 | return err; |
| 885 | } |
| 886 | |
| 887 | /** |
| 888 | * ata_dev_id_string - Convert IDENTIFY DEVICE page into string |
| 889 | * @id: IDENTIFY DEVICE results we will examine |
| 890 | * @s: string into which data is output |
| 891 | * @ofs: offset into identify device page |
| 892 | * @len: length of string to return. must be an even number. |
| 893 | * |
| 894 | * The strings in the IDENTIFY DEVICE page are broken up into |
| 895 | * 16-bit chunks. Run through the string, and output each |
| 896 | * 8-bit chunk linearly, regardless of platform. |
| 897 | * |
| 898 | * LOCKING: |
| 899 | * caller. |
| 900 | */ |
| 901 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 902 | void ata_dev_id_string(const u16 *id, unsigned char *s, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | unsigned int ofs, unsigned int len) |
| 904 | { |
| 905 | unsigned int c; |
| 906 | |
| 907 | while (len > 0) { |
| 908 | c = id[ofs] >> 8; |
| 909 | *s = c; |
| 910 | s++; |
| 911 | |
| 912 | c = id[ofs] & 0xff; |
| 913 | *s = c; |
| 914 | s++; |
| 915 | |
| 916 | ofs++; |
| 917 | len -= 2; |
| 918 | } |
| 919 | } |
| 920 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 921 | |
| 922 | /** |
| 923 | * ata_noop_dev_select - Select device 0/1 on ATA bus |
| 924 | * @ap: ATA channel to manipulate |
| 925 | * @device: ATA device (numbered from zero) to select |
| 926 | * |
| 927 | * This function performs no actual function. |
| 928 | * |
| 929 | * May be used as the dev_select() entry in ata_port_operations. |
| 930 | * |
| 931 | * LOCKING: |
| 932 | * caller. |
| 933 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
| 935 | { |
| 936 | } |
| 937 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | /** |
| 940 | * ata_std_dev_select - Select device 0/1 on ATA bus |
| 941 | * @ap: ATA channel to manipulate |
| 942 | * @device: ATA device (numbered from zero) to select |
| 943 | * |
| 944 | * Use the method defined in the ATA specification to |
| 945 | * make either device 0, or device 1, active on the |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 946 | * ATA channel. Works with both PIO and MMIO. |
| 947 | * |
| 948 | * May be used as the dev_select() entry in ata_port_operations. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | * |
| 950 | * LOCKING: |
| 951 | * caller. |
| 952 | */ |
| 953 | |
| 954 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) |
| 955 | { |
| 956 | u8 tmp; |
| 957 | |
| 958 | if (device == 0) |
| 959 | tmp = ATA_DEVICE_OBS; |
| 960 | else |
| 961 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 962 | |
| 963 | if (ap->flags & ATA_FLAG_MMIO) { |
| 964 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); |
| 965 | } else { |
| 966 | outb(tmp, ap->ioaddr.device_addr); |
| 967 | } |
| 968 | ata_pause(ap); /* needed; also flushes, for mmio */ |
| 969 | } |
| 970 | |
| 971 | /** |
| 972 | * ata_dev_select - Select device 0/1 on ATA bus |
| 973 | * @ap: ATA channel to manipulate |
| 974 | * @device: ATA device (numbered from zero) to select |
| 975 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 976 | * @can_sleep: non-zero if context allows sleeping |
| 977 | * |
| 978 | * Use the method defined in the ATA specification to |
| 979 | * make either device 0, or device 1, active on the |
| 980 | * ATA channel. |
| 981 | * |
| 982 | * This is a high-level version of ata_std_dev_select(), |
| 983 | * which additionally provides the services of inserting |
| 984 | * the proper pauses and status polling, where needed. |
| 985 | * |
| 986 | * LOCKING: |
| 987 | * caller. |
| 988 | */ |
| 989 | |
| 990 | void ata_dev_select(struct ata_port *ap, unsigned int device, |
| 991 | unsigned int wait, unsigned int can_sleep) |
| 992 | { |
| 993 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", |
| 994 | ap->id, device, wait); |
| 995 | |
| 996 | if (wait) |
| 997 | ata_wait_idle(ap); |
| 998 | |
| 999 | ap->ops->dev_select(ap, device); |
| 1000 | |
| 1001 | if (wait) { |
| 1002 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) |
| 1003 | msleep(150); |
| 1004 | ata_wait_idle(ap); |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /** |
| 1009 | * ata_dump_id - IDENTIFY DEVICE info debugging output |
| 1010 | * @dev: Device whose IDENTIFY DEVICE page we will dump |
| 1011 | * |
| 1012 | * Dump selected 16-bit words from a detected device's |
| 1013 | * IDENTIFY PAGE page. |
| 1014 | * |
| 1015 | * LOCKING: |
| 1016 | * caller. |
| 1017 | */ |
| 1018 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1019 | static inline void ata_dump_id(const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | { |
| 1021 | DPRINTK("49==0x%04x " |
| 1022 | "53==0x%04x " |
| 1023 | "63==0x%04x " |
| 1024 | "64==0x%04x " |
| 1025 | "75==0x%04x \n", |
| 1026 | dev->id[49], |
| 1027 | dev->id[53], |
| 1028 | dev->id[63], |
| 1029 | dev->id[64], |
| 1030 | dev->id[75]); |
| 1031 | DPRINTK("80==0x%04x " |
| 1032 | "81==0x%04x " |
| 1033 | "82==0x%04x " |
| 1034 | "83==0x%04x " |
| 1035 | "84==0x%04x \n", |
| 1036 | dev->id[80], |
| 1037 | dev->id[81], |
| 1038 | dev->id[82], |
| 1039 | dev->id[83], |
| 1040 | dev->id[84]); |
| 1041 | DPRINTK("88==0x%04x " |
| 1042 | "93==0x%04x\n", |
| 1043 | dev->id[88], |
| 1044 | dev->id[93]); |
| 1045 | } |
| 1046 | |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1047 | /* |
| 1048 | * Compute the PIO modes available for this device. This is not as |
| 1049 | * trivial as it seems if we must consider early devices correctly. |
| 1050 | * |
| 1051 | * FIXME: pre IDE drive timing (do we care ?). |
| 1052 | */ |
| 1053 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1054 | static unsigned int ata_pio_modes(const struct ata_device *adev) |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1055 | { |
| 1056 | u16 modes; |
| 1057 | |
Alan Cox | ffa2945 | 2006-01-09 17:14:40 +0000 | [diff] [blame] | 1058 | /* Usual case. Word 53 indicates word 64 is valid */ |
| 1059 | if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1060 | modes = adev->id[ATA_ID_PIO_MODES] & 0x03; |
| 1061 | modes <<= 3; |
| 1062 | modes |= 0x7; |
| 1063 | return modes; |
| 1064 | } |
| 1065 | |
Alan Cox | ffa2945 | 2006-01-09 17:14:40 +0000 | [diff] [blame] | 1066 | /* If word 64 isn't valid then Word 51 high byte holds the PIO timing |
| 1067 | number for the maximum. Turn it into a mask and return it */ |
| 1068 | modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ; |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1069 | return modes; |
Alan Cox | ffa2945 | 2006-01-09 17:14:40 +0000 | [diff] [blame] | 1070 | /* But wait.. there's more. Design your standards by committee and |
| 1071 | you too can get a free iordy field to process. However its the |
| 1072 | speeds not the modes that are supported... Note drivers using the |
| 1073 | timing API will get this right anyway */ |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1074 | } |
| 1075 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1076 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
Jeff Garzik | 64f043d | 2005-11-17 10:50:01 -0500 | [diff] [blame] | 1077 | { |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1078 | struct completion *waiting = qc->private_data; |
Jeff Garzik | 64f043d | 2005-11-17 10:50:01 -0500 | [diff] [blame] | 1079 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1080 | qc->ap->ops->tf_read(qc->ap, &qc->tf); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1081 | complete(waiting); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1082 | } |
Jeff Garzik | 64f043d | 2005-11-17 10:50:01 -0500 | [diff] [blame] | 1083 | |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1084 | /** |
| 1085 | * ata_exec_internal - execute libata internal command |
| 1086 | * @ap: Port to which the command is sent |
| 1087 | * @dev: Device to which the command is sent |
| 1088 | * @tf: Taskfile registers for the command and the result |
| 1089 | * @dma_dir: Data tranfer direction of the command |
| 1090 | * @buf: Data buffer of the command |
| 1091 | * @buflen: Length of data buffer |
| 1092 | * |
| 1093 | * Executes libata internal command with timeout. @tf contains |
| 1094 | * command on entry and result on return. Timeout and error |
| 1095 | * conditions are reported via return value. No recovery action |
| 1096 | * is taken after a command times out. It's caller's duty to |
| 1097 | * clean up after timeout. |
| 1098 | * |
| 1099 | * LOCKING: |
| 1100 | * None. Should be called with kernel context, might sleep. |
| 1101 | */ |
| 1102 | |
| 1103 | static unsigned |
| 1104 | ata_exec_internal(struct ata_port *ap, struct ata_device *dev, |
| 1105 | struct ata_taskfile *tf, |
| 1106 | int dma_dir, void *buf, unsigned int buflen) |
| 1107 | { |
| 1108 | u8 command = tf->command; |
| 1109 | struct ata_queued_cmd *qc; |
| 1110 | DECLARE_COMPLETION(wait); |
| 1111 | unsigned long flags; |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1112 | unsigned int err_mask; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1113 | |
| 1114 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 1115 | |
| 1116 | qc = ata_qc_new_init(ap, dev); |
| 1117 | BUG_ON(qc == NULL); |
| 1118 | |
| 1119 | qc->tf = *tf; |
| 1120 | qc->dma_dir = dma_dir; |
| 1121 | if (dma_dir != DMA_NONE) { |
| 1122 | ata_sg_init_one(qc, buf, buflen); |
| 1123 | qc->nsect = buflen / ATA_SECT_SIZE; |
Jeff Garzik | 64f043d | 2005-11-17 10:50:01 -0500 | [diff] [blame] | 1124 | } |
| 1125 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1126 | qc->private_data = &wait; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1127 | qc->complete_fn = ata_qc_complete_internal; |
| 1128 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1129 | qc->err_mask = ata_qc_issue(qc); |
| 1130 | if (qc->err_mask) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1131 | ata_qc_complete(qc); |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1132 | |
| 1133 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 1134 | |
| 1135 | if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { |
| 1136 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 1137 | |
| 1138 | /* We're racing with irq here. If we lose, the |
| 1139 | * following test prevents us from completing the qc |
| 1140 | * again. If completion irq occurs after here but |
| 1141 | * before the caller cleans up, it will result in a |
| 1142 | * spurious interrupt. We can live with that. |
| 1143 | */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1144 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1145 | qc->err_mask = AC_ERR_TIMEOUT; |
Tejun Heo | a2a7a66 | 2005-12-13 14:48:31 +0900 | [diff] [blame] | 1146 | ata_qc_complete(qc); |
| 1147 | printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", |
| 1148 | ap->id, command); |
| 1149 | } |
| 1150 | |
| 1151 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 1152 | } |
| 1153 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1154 | *tf = qc->tf; |
| 1155 | err_mask = qc->err_mask; |
| 1156 | |
| 1157 | ata_qc_free(qc); |
| 1158 | |
| 1159 | return err_mask; |
Jeff Garzik | 64f043d | 2005-11-17 10:50:01 -0500 | [diff] [blame] | 1160 | } |
| 1161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | /** |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 1163 | * ata_pio_need_iordy - check if iordy needed |
| 1164 | * @adev: ATA device |
| 1165 | * |
| 1166 | * Check if the current speed of the device requires IORDY. Used |
| 1167 | * by various controllers for chip configuration. |
| 1168 | */ |
| 1169 | |
| 1170 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| 1171 | { |
| 1172 | int pio; |
| 1173 | int speed = adev->pio_mode - XFER_PIO_0; |
| 1174 | |
| 1175 | if (speed < 2) |
| 1176 | return 0; |
| 1177 | if (speed > 2) |
| 1178 | return 1; |
| 1179 | |
| 1180 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
| 1181 | |
| 1182 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
| 1183 | pio = adev->id[ATA_ID_EIDE_PIO]; |
| 1184 | /* Is the speed faster than the drive allows non IORDY ? */ |
| 1185 | if (pio) { |
| 1186 | /* This is cycle times not frequency - watch the logic! */ |
| 1187 | if (pio > 240) /* PIO2 is 240nS per cycle */ |
| 1188 | return 1; |
| 1189 | return 0; |
| 1190 | } |
| 1191 | } |
| 1192 | return 0; |
| 1193 | } |
| 1194 | |
| 1195 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | * ata_dev_identify - obtain IDENTIFY x DEVICE page |
| 1197 | * @ap: port on which device we wish to probe resides |
| 1198 | * @device: device bus address, starting at zero |
| 1199 | * |
| 1200 | * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE |
| 1201 | * command, and read back the 512-byte device information page. |
| 1202 | * The device information page is fed to us via the standard |
| 1203 | * PIO-IN protocol, but we hand-code it here. (TODO: investigate |
| 1204 | * using standard PIO-IN paths) |
| 1205 | * |
| 1206 | * After reading the device information page, we use several |
| 1207 | * bits of information from it to initialize data structures |
| 1208 | * that will be used during the lifetime of the ata_device. |
| 1209 | * Other data from the info page is used to disqualify certain |
| 1210 | * older ATA devices we do not wish to support. |
| 1211 | * |
| 1212 | * LOCKING: |
| 1213 | * Inherited from caller. Some functions called by this function |
| 1214 | * obtain the host_set lock. |
| 1215 | */ |
| 1216 | |
| 1217 | static void ata_dev_identify(struct ata_port *ap, unsigned int device) |
| 1218 | { |
| 1219 | struct ata_device *dev = &ap->device[device]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1220 | unsigned int major_version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | u16 tmp; |
| 1222 | unsigned long xfer_modes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | unsigned int using_edd; |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1224 | struct ata_taskfile tf; |
| 1225 | unsigned int err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | int rc; |
| 1227 | |
| 1228 | if (!ata_dev_present(dev)) { |
| 1229 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
| 1230 | ap->id, device); |
| 1231 | return; |
| 1232 | } |
| 1233 | |
| 1234 | if (ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET)) |
| 1235 | using_edd = 0; |
| 1236 | else |
| 1237 | using_edd = 1; |
| 1238 | |
| 1239 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, device); |
| 1240 | |
| 1241 | assert (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ATAPI || |
| 1242 | dev->class == ATA_DEV_NONE); |
| 1243 | |
| 1244 | ata_dev_select(ap, device, 1, 1); /* select device 0/1 */ |
| 1245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | retry: |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1247 | ata_tf_init(ap, &tf, device); |
| 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | if (dev->class == ATA_DEV_ATA) { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1250 | tf.command = ATA_CMD_ID_ATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | DPRINTK("do ATA identify\n"); |
| 1252 | } else { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1253 | tf.command = ATA_CMD_ID_ATAPI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | DPRINTK("do ATAPI identify\n"); |
| 1255 | } |
| 1256 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1257 | tf.protocol = ATA_PROT_PIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1259 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, |
| 1260 | dev->id, sizeof(dev->id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1262 | if (err_mask) { |
| 1263 | if (err_mask & ~AC_ERR_DEV) |
| 1264 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | /* |
| 1267 | * arg! EDD works for all test cases, but seems to return |
| 1268 | * the ATA signature for some ATAPI devices. Until the |
| 1269 | * reason for this is found and fixed, we fix up the mess |
| 1270 | * here. If IDENTIFY DEVICE returns command aborted |
| 1271 | * (as ATAPI devices do), then we issue an |
| 1272 | * IDENTIFY PACKET DEVICE. |
| 1273 | * |
| 1274 | * ATA software reset (SRST, the default) does not appear |
| 1275 | * to have this problem. |
| 1276 | */ |
Albert Lee | 7c39833 | 2005-11-09 13:03:30 +0800 | [diff] [blame] | 1277 | if ((using_edd) && (dev->class == ATA_DEV_ATA)) { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 1278 | u8 err = tf.feature; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | if (err & ATA_ABORTED) { |
| 1280 | dev->class = ATA_DEV_ATAPI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | goto retry; |
| 1282 | } |
| 1283 | } |
| 1284 | goto err_out; |
| 1285 | } |
| 1286 | |
| 1287 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
| 1288 | |
| 1289 | /* print device capabilities */ |
| 1290 | printk(KERN_DEBUG "ata%u: dev %u cfg " |
| 1291 | "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", |
| 1292 | ap->id, device, dev->id[49], |
| 1293 | dev->id[82], dev->id[83], dev->id[84], |
| 1294 | dev->id[85], dev->id[86], dev->id[87], |
| 1295 | dev->id[88]); |
| 1296 | |
| 1297 | /* |
| 1298 | * common ATA, ATAPI feature tests |
| 1299 | */ |
| 1300 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1301 | /* we require DMA support (bits 8 of word 49) */ |
| 1302 | if (!ata_id_has_dma(dev->id)) { |
| 1303 | printk(KERN_DEBUG "ata%u: no dma\n", ap->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | goto err_out_nosup; |
| 1305 | } |
| 1306 | |
| 1307 | /* quick-n-dirty find max transfer mode; for printk only */ |
| 1308 | xfer_modes = dev->id[ATA_ID_UDMA_MODES]; |
| 1309 | if (!xfer_modes) |
| 1310 | xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA; |
Alan Cox | 11e29e2 | 2005-10-21 18:46:32 -0400 | [diff] [blame] | 1311 | if (!xfer_modes) |
| 1312 | xfer_modes = ata_pio_modes(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
| 1314 | ata_dump_id(dev); |
| 1315 | |
| 1316 | /* ATA-specific feature tests */ |
| 1317 | if (dev->class == ATA_DEV_ATA) { |
| 1318 | if (!ata_id_is_ata(dev->id)) /* sanity check */ |
| 1319 | goto err_out_nosup; |
| 1320 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1321 | /* get major version */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | tmp = dev->id[ATA_ID_MAJOR_VER]; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1323 | for (major_version = 14; major_version >= 1; major_version--) |
| 1324 | if (tmp & (1 << major_version)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | break; |
| 1326 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1327 | /* |
| 1328 | * The exact sequence expected by certain pre-ATA4 drives is: |
| 1329 | * SRST RESET |
| 1330 | * IDENTIFY |
| 1331 | * INITIALIZE DEVICE PARAMETERS |
| 1332 | * anything else.. |
| 1333 | * Some drives were very specific about that exact sequence. |
| 1334 | */ |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 1335 | if (major_version < 4 || (!ata_id_has_lba(dev->id))) { |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1336 | ata_dev_init_params(ap, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 1338 | /* current CHS translation info (id[53-58]) might be |
| 1339 | * changed. reread the identify device info. |
| 1340 | */ |
| 1341 | ata_dev_reread_id(ap, dev); |
| 1342 | } |
| 1343 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1344 | if (ata_id_has_lba(dev->id)) { |
| 1345 | dev->flags |= ATA_DFLAG_LBA; |
| 1346 | |
| 1347 | if (ata_id_has_lba48(dev->id)) { |
| 1348 | dev->flags |= ATA_DFLAG_LBA48; |
| 1349 | dev->n_sectors = ata_id_u64(dev->id, 100); |
| 1350 | } else { |
| 1351 | dev->n_sectors = ata_id_u32(dev->id, 60); |
| 1352 | } |
| 1353 | |
| 1354 | /* print device info to dmesg */ |
| 1355 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n", |
| 1356 | ap->id, device, |
| 1357 | major_version, |
| 1358 | ata_mode_string(xfer_modes), |
| 1359 | (unsigned long long)dev->n_sectors, |
| 1360 | dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA"); |
| 1361 | } else { |
| 1362 | /* CHS */ |
| 1363 | |
| 1364 | /* Default translation */ |
| 1365 | dev->cylinders = dev->id[1]; |
| 1366 | dev->heads = dev->id[3]; |
| 1367 | dev->sectors = dev->id[6]; |
| 1368 | dev->n_sectors = dev->cylinders * dev->heads * dev->sectors; |
| 1369 | |
| 1370 | if (ata_id_current_chs_valid(dev->id)) { |
| 1371 | /* Current CHS translation is valid. */ |
| 1372 | dev->cylinders = dev->id[54]; |
| 1373 | dev->heads = dev->id[55]; |
| 1374 | dev->sectors = dev->id[56]; |
| 1375 | |
| 1376 | dev->n_sectors = ata_id_u32(dev->id, 57); |
| 1377 | } |
| 1378 | |
| 1379 | /* print device info to dmesg */ |
| 1380 | printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n", |
| 1381 | ap->id, device, |
| 1382 | major_version, |
| 1383 | ata_mode_string(xfer_modes), |
| 1384 | (unsigned long long)dev->n_sectors, |
| 1385 | (int)dev->cylinders, (int)dev->heads, (int)dev->sectors); |
| 1386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | } |
| 1388 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 1389 | if (dev->id[59] & 0x100) { |
| 1390 | dev->multi_count = dev->id[59] & 0xff; |
| 1391 | DPRINTK("ata%u: dev %u multi count %u\n", |
| 1392 | ap->id, device, dev->multi_count); |
| 1393 | } |
| 1394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | ap->host->max_cmd_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | /* ATAPI-specific feature tests */ |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 1399 | else if (dev->class == ATA_DEV_ATAPI) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | if (ata_id_is_ata(dev->id)) /* sanity check */ |
| 1401 | goto err_out_nosup; |
| 1402 | |
| 1403 | rc = atapi_cdb_len(dev->id); |
| 1404 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
| 1405 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); |
| 1406 | goto err_out_nosup; |
| 1407 | } |
| 1408 | ap->cdb_len = (unsigned int) rc; |
| 1409 | ap->host->max_cmd_len = (unsigned char) ap->cdb_len; |
| 1410 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 1411 | if (ata_id_cdb_intr(dev->id)) |
| 1412 | dev->flags |= ATA_DFLAG_CDB_INTR; |
| 1413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | /* print device info to dmesg */ |
| 1415 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", |
| 1416 | ap->id, device, |
| 1417 | ata_mode_string(xfer_modes)); |
| 1418 | } |
| 1419 | |
| 1420 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
| 1421 | return; |
| 1422 | |
| 1423 | err_out_nosup: |
| 1424 | printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n", |
| 1425 | ap->id, device); |
| 1426 | err_out: |
| 1427 | dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */ |
| 1428 | DPRINTK("EXIT, err\n"); |
| 1429 | } |
| 1430 | |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1431 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1432 | static inline u8 ata_dev_knobble(const struct ata_port *ap) |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1433 | { |
| 1434 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id))); |
| 1435 | } |
| 1436 | |
| 1437 | /** |
| 1438 | * ata_dev_config - Run device specific handlers and check for |
| 1439 | * SATA->PATA bridges |
Jeff Garzik | 8a60a07 | 2005-07-31 13:13:24 -0400 | [diff] [blame] | 1440 | * @ap: Bus |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1441 | * @i: Device |
| 1442 | * |
| 1443 | * LOCKING: |
| 1444 | */ |
Jeff Garzik | 8a60a07 | 2005-07-31 13:13:24 -0400 | [diff] [blame] | 1445 | |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1446 | void ata_dev_config(struct ata_port *ap, unsigned int i) |
| 1447 | { |
| 1448 | /* limit bridge transfers to udma5, 200 sectors */ |
| 1449 | if (ata_dev_knobble(ap)) { |
| 1450 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", |
| 1451 | ap->id, ap->device->devno); |
| 1452 | ap->udma_mask &= ATA_UDMA5; |
| 1453 | ap->host->max_sectors = ATA_MAX_SECTORS; |
| 1454 | ap->host->hostt->max_sectors = ATA_MAX_SECTORS; |
Alan Cox | 9d824d0 | 2006-01-17 20:51:55 +0000 | [diff] [blame] | 1455 | ap->device[i].flags |= ATA_DFLAG_LOCK_SECTORS; |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1456 | } |
| 1457 | |
| 1458 | if (ap->ops->dev_config) |
| 1459 | ap->ops->dev_config(ap, &ap->device[i]); |
| 1460 | } |
| 1461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | /** |
| 1463 | * ata_bus_probe - Reset and probe ATA bus |
| 1464 | * @ap: Bus to probe |
| 1465 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1466 | * Master ATA bus probing function. Initiates a hardware-dependent |
| 1467 | * bus reset, then attempts to identify any devices found on |
| 1468 | * the bus. |
| 1469 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1471 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | * |
| 1473 | * RETURNS: |
| 1474 | * Zero on success, non-zero on error. |
| 1475 | */ |
| 1476 | |
| 1477 | static int ata_bus_probe(struct ata_port *ap) |
| 1478 | { |
| 1479 | unsigned int i, found = 0; |
| 1480 | |
| 1481 | ap->ops->phy_reset(ap); |
| 1482 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1483 | goto err_out; |
| 1484 | |
| 1485 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1486 | ata_dev_identify(ap, i); |
| 1487 | if (ata_dev_present(&ap->device[i])) { |
| 1488 | found = 1; |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 1489 | ata_dev_config(ap,i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1494 | goto err_out_disable; |
| 1495 | |
| 1496 | ata_set_mode(ap); |
| 1497 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1498 | goto err_out_disable; |
| 1499 | |
| 1500 | return 0; |
| 1501 | |
| 1502 | err_out_disable: |
| 1503 | ap->ops->port_disable(ap); |
| 1504 | err_out: |
| 1505 | return -1; |
| 1506 | } |
| 1507 | |
| 1508 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1509 | * ata_port_probe - Mark port as enabled |
| 1510 | * @ap: Port for which we indicate enablement |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1512 | * Modify @ap data structure such that the system |
| 1513 | * thinks that the entire port is enabled. |
| 1514 | * |
| 1515 | * LOCKING: host_set lock, or some other form of |
| 1516 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | */ |
| 1518 | |
| 1519 | void ata_port_probe(struct ata_port *ap) |
| 1520 | { |
| 1521 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; |
| 1522 | } |
| 1523 | |
| 1524 | /** |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 1525 | * sata_print_link_status - Print SATA link status |
| 1526 | * @ap: SATA port to printk link status about |
| 1527 | * |
| 1528 | * This function prints link speed and status of a SATA link. |
| 1529 | * |
| 1530 | * LOCKING: |
| 1531 | * None. |
| 1532 | */ |
| 1533 | static void sata_print_link_status(struct ata_port *ap) |
| 1534 | { |
| 1535 | u32 sstatus, tmp; |
| 1536 | const char *speed; |
| 1537 | |
| 1538 | if (!ap->ops->scr_read) |
| 1539 | return; |
| 1540 | |
| 1541 | sstatus = scr_read(ap, SCR_STATUS); |
| 1542 | |
| 1543 | if (sata_dev_present(ap)) { |
| 1544 | tmp = (sstatus >> 4) & 0xf; |
| 1545 | if (tmp & (1 << 0)) |
| 1546 | speed = "1.5"; |
| 1547 | else if (tmp & (1 << 1)) |
| 1548 | speed = "3.0"; |
| 1549 | else |
| 1550 | speed = "<unknown>"; |
| 1551 | printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n", |
| 1552 | ap->id, speed, sstatus); |
| 1553 | } else { |
| 1554 | printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", |
| 1555 | ap->id, sstatus); |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1560 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
| 1561 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1563 | * This function issues commands to standard SATA Sxxx |
| 1564 | * PHY registers, to wake up the phy (and device), and |
| 1565 | * clear any reset condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | * |
| 1567 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1568 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | * |
| 1570 | */ |
| 1571 | void __sata_phy_reset(struct ata_port *ap) |
| 1572 | { |
| 1573 | u32 sstatus; |
| 1574 | unsigned long timeout = jiffies + (HZ * 5); |
| 1575 | |
| 1576 | if (ap->flags & ATA_FLAG_SATA_RESET) { |
Brett Russ | cdcca89 | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 1577 | /* issue phy wake/reset */ |
| 1578 | scr_write_flush(ap, SCR_CONTROL, 0x301); |
Tejun Heo | 62ba284 | 2005-06-26 23:27:19 +0900 | [diff] [blame] | 1579 | /* Couldn't find anything in SATA I/II specs, but |
| 1580 | * AHCI-1.1 10.4.2 says at least 1 ms. */ |
| 1581 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | } |
Brett Russ | cdcca89 | 2005-03-28 15:10:27 -0500 | [diff] [blame] | 1583 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | |
| 1585 | /* wait for phy to become ready, if necessary */ |
| 1586 | do { |
| 1587 | msleep(200); |
| 1588 | sstatus = scr_read(ap, SCR_STATUS); |
| 1589 | if ((sstatus & 0xf) != 1) |
| 1590 | break; |
| 1591 | } while (time_before(jiffies, timeout)); |
| 1592 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 1593 | /* print link status */ |
| 1594 | sata_print_link_status(ap); |
Jeff Garzik | 656563e | 2005-11-20 03:36:45 -0500 | [diff] [blame] | 1595 | |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 1596 | /* TODO: phy layer with polling, timeouts, etc. */ |
| 1597 | if (sata_dev_present(ap)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | ata_port_probe(ap); |
Tejun Heo | 3be680b | 2005-12-19 22:35:02 +0900 | [diff] [blame] | 1599 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | ata_port_disable(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | |
| 1602 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1603 | return; |
| 1604 | |
| 1605 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
| 1606 | ata_port_disable(ap); |
| 1607 | return; |
| 1608 | } |
| 1609 | |
| 1610 | ap->cbl = ATA_CBL_SATA; |
| 1611 | } |
| 1612 | |
| 1613 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1614 | * sata_phy_reset - Reset SATA bus. |
| 1615 | * @ap: SATA port associated with target SATA PHY. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1617 | * This function resets the SATA bus, and then probes |
| 1618 | * the bus for devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | * |
| 1620 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1621 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | * |
| 1623 | */ |
| 1624 | void sata_phy_reset(struct ata_port *ap) |
| 1625 | { |
| 1626 | __sata_phy_reset(ap); |
| 1627 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1628 | return; |
| 1629 | ata_bus_reset(ap); |
| 1630 | } |
| 1631 | |
| 1632 | /** |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1633 | * ata_port_disable - Disable port. |
| 1634 | * @ap: Port to be disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1636 | * Modify @ap data structure such that the system |
| 1637 | * thinks that the entire port is disabled, and should |
| 1638 | * never attempt to probe or communicate with devices |
| 1639 | * on this port. |
| 1640 | * |
| 1641 | * LOCKING: host_set lock, or some other form of |
| 1642 | * serialization. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | */ |
| 1644 | |
| 1645 | void ata_port_disable(struct ata_port *ap) |
| 1646 | { |
| 1647 | ap->device[0].class = ATA_DEV_NONE; |
| 1648 | ap->device[1].class = ATA_DEV_NONE; |
| 1649 | ap->flags |= ATA_FLAG_PORT_DISABLED; |
| 1650 | } |
| 1651 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 1652 | /* |
| 1653 | * This mode timing computation functionality is ported over from |
| 1654 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| 1655 | */ |
| 1656 | /* |
| 1657 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
| 1658 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
| 1659 | * for PIO 5, which is a nonstandard extension and UDMA6, which |
| 1660 | * is currently supported only by Maxtor drives. |
| 1661 | */ |
| 1662 | |
| 1663 | static const struct ata_timing ata_timing[] = { |
| 1664 | |
| 1665 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, |
| 1666 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| 1667 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| 1668 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| 1669 | |
| 1670 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| 1671 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| 1672 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| 1673 | |
| 1674 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
| 1675 | |
| 1676 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
| 1677 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, |
| 1678 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
| 1679 | |
| 1680 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
| 1681 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, |
| 1682 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
| 1683 | |
| 1684 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ |
| 1685 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
| 1686 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, |
| 1687 | |
| 1688 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, |
| 1689 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, |
| 1690 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, |
| 1691 | |
| 1692 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
| 1693 | |
| 1694 | { 0xFF } |
| 1695 | }; |
| 1696 | |
| 1697 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) |
| 1698 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) |
| 1699 | |
| 1700 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| 1701 | { |
| 1702 | q->setup = EZ(t->setup * 1000, T); |
| 1703 | q->act8b = EZ(t->act8b * 1000, T); |
| 1704 | q->rec8b = EZ(t->rec8b * 1000, T); |
| 1705 | q->cyc8b = EZ(t->cyc8b * 1000, T); |
| 1706 | q->active = EZ(t->active * 1000, T); |
| 1707 | q->recover = EZ(t->recover * 1000, T); |
| 1708 | q->cycle = EZ(t->cycle * 1000, T); |
| 1709 | q->udma = EZ(t->udma * 1000, UT); |
| 1710 | } |
| 1711 | |
| 1712 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| 1713 | struct ata_timing *m, unsigned int what) |
| 1714 | { |
| 1715 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| 1716 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| 1717 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| 1718 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| 1719 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| 1720 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| 1721 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| 1722 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| 1723 | } |
| 1724 | |
| 1725 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) |
| 1726 | { |
| 1727 | const struct ata_timing *t; |
| 1728 | |
| 1729 | for (t = ata_timing; t->mode != speed; t++) |
Alan Cox | 9119075 | 2005-10-26 12:17:46 -0400 | [diff] [blame] | 1730 | if (t->mode == 0xFF) |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 1731 | return NULL; |
| 1732 | return t; |
| 1733 | } |
| 1734 | |
| 1735 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| 1736 | struct ata_timing *t, int T, int UT) |
| 1737 | { |
| 1738 | const struct ata_timing *s; |
| 1739 | struct ata_timing p; |
| 1740 | |
| 1741 | /* |
| 1742 | * Find the mode. |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 1743 | */ |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 1744 | |
| 1745 | if (!(s = ata_timing_find_mode(speed))) |
| 1746 | return -EINVAL; |
| 1747 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 1748 | memcpy(t, s, sizeof(*s)); |
| 1749 | |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 1750 | /* |
| 1751 | * If the drive is an EIDE drive, it can tell us it needs extended |
| 1752 | * PIO/MW_DMA cycle timing. |
| 1753 | */ |
| 1754 | |
| 1755 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| 1756 | memset(&p, 0, sizeof(p)); |
| 1757 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
| 1758 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
| 1759 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; |
| 1760 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
| 1761 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
| 1762 | } |
| 1763 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| 1764 | } |
| 1765 | |
| 1766 | /* |
| 1767 | * Convert the timing to bus clock counts. |
| 1768 | */ |
| 1769 | |
Albert Lee | 75b1f2f | 2005-11-16 17:06:18 +0800 | [diff] [blame] | 1770 | ata_timing_quantize(t, t, T, UT); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 1771 | |
| 1772 | /* |
| 1773 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T |
| 1774 | * and some other commands. We have to ensure that the DMA cycle timing is |
| 1775 | * slower/equal than the fastest PIO timing. |
| 1776 | */ |
| 1777 | |
| 1778 | if (speed > XFER_PIO_4) { |
| 1779 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
| 1780 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); |
| 1781 | } |
| 1782 | |
| 1783 | /* |
| 1784 | * Lenghten active & recovery time so that cycle time is correct. |
| 1785 | */ |
| 1786 | |
| 1787 | if (t->act8b + t->rec8b < t->cyc8b) { |
| 1788 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; |
| 1789 | t->rec8b = t->cyc8b - t->act8b; |
| 1790 | } |
| 1791 | |
| 1792 | if (t->active + t->recover < t->cycle) { |
| 1793 | t->active += (t->cycle - (t->active + t->recover)) / 2; |
| 1794 | t->recover = t->cycle - t->active; |
| 1795 | } |
| 1796 | |
| 1797 | return 0; |
| 1798 | } |
| 1799 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1800 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | unsigned int shift; |
| 1802 | u8 base; |
| 1803 | } xfer_mode_classes[] = { |
| 1804 | { ATA_SHIFT_UDMA, XFER_UDMA_0 }, |
| 1805 | { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 }, |
| 1806 | { ATA_SHIFT_PIO, XFER_PIO_0 }, |
| 1807 | }; |
| 1808 | |
Arjan van de Ven | 858119e | 2006-01-14 13:20:43 -0800 | [diff] [blame] | 1809 | static u8 base_from_shift(unsigned int shift) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | { |
| 1811 | int i; |
| 1812 | |
| 1813 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) |
| 1814 | if (xfer_mode_classes[i].shift == shift) |
| 1815 | return xfer_mode_classes[i].base; |
| 1816 | |
| 1817 | return 0xff; |
| 1818 | } |
| 1819 | |
| 1820 | static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
| 1821 | { |
| 1822 | int ofs, idx; |
| 1823 | u8 base; |
| 1824 | |
| 1825 | if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED)) |
| 1826 | return; |
| 1827 | |
| 1828 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
| 1829 | dev->flags |= ATA_DFLAG_PIO; |
| 1830 | |
| 1831 | ata_dev_set_xfermode(ap, dev); |
| 1832 | |
| 1833 | base = base_from_shift(dev->xfer_shift); |
| 1834 | ofs = dev->xfer_mode - base; |
| 1835 | idx = ofs + dev->xfer_shift; |
| 1836 | WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str)); |
| 1837 | |
| 1838 | DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n", |
| 1839 | idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs); |
| 1840 | |
| 1841 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", |
| 1842 | ap->id, dev->devno, xfer_mode_str[idx]); |
| 1843 | } |
| 1844 | |
| 1845 | static int ata_host_set_pio(struct ata_port *ap) |
| 1846 | { |
| 1847 | unsigned int mask; |
| 1848 | int x, i; |
| 1849 | u8 base, xfer_mode; |
| 1850 | |
| 1851 | mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO); |
| 1852 | x = fgb(mask); |
| 1853 | if (x < 0) { |
| 1854 | printk(KERN_WARNING "ata%u: no PIO support\n", ap->id); |
| 1855 | return -1; |
| 1856 | } |
| 1857 | |
| 1858 | base = base_from_shift(ATA_SHIFT_PIO); |
| 1859 | xfer_mode = base + x; |
| 1860 | |
| 1861 | DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n", |
| 1862 | (int)base, (int)xfer_mode, mask, x); |
| 1863 | |
| 1864 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1865 | struct ata_device *dev = &ap->device[i]; |
| 1866 | if (ata_dev_present(dev)) { |
| 1867 | dev->pio_mode = xfer_mode; |
| 1868 | dev->xfer_mode = xfer_mode; |
| 1869 | dev->xfer_shift = ATA_SHIFT_PIO; |
| 1870 | if (ap->ops->set_piomode) |
| 1871 | ap->ops->set_piomode(ap, dev); |
| 1872 | } |
| 1873 | } |
| 1874 | |
| 1875 | return 0; |
| 1876 | } |
| 1877 | |
| 1878 | static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode, |
| 1879 | unsigned int xfer_shift) |
| 1880 | { |
| 1881 | int i; |
| 1882 | |
| 1883 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 1884 | struct ata_device *dev = &ap->device[i]; |
| 1885 | if (ata_dev_present(dev)) { |
| 1886 | dev->dma_mode = xfer_mode; |
| 1887 | dev->xfer_mode = xfer_mode; |
| 1888 | dev->xfer_shift = xfer_shift; |
| 1889 | if (ap->ops->set_dmamode) |
| 1890 | ap->ops->set_dmamode(ap, dev); |
| 1891 | } |
| 1892 | } |
| 1893 | } |
| 1894 | |
| 1895 | /** |
| 1896 | * ata_set_mode - Program timings and issue SET FEATURES - XFER |
| 1897 | * @ap: port on which timings will be programmed |
| 1898 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1899 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). |
| 1900 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1902 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | * |
| 1904 | */ |
| 1905 | static void ata_set_mode(struct ata_port *ap) |
| 1906 | { |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 1907 | unsigned int xfer_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | u8 xfer_mode; |
| 1909 | int rc; |
| 1910 | |
| 1911 | /* step 1: always set host PIO timings */ |
| 1912 | rc = ata_host_set_pio(ap); |
| 1913 | if (rc) |
| 1914 | goto err_out; |
| 1915 | |
| 1916 | /* step 2: choose the best data xfer mode */ |
| 1917 | xfer_mode = xfer_shift = 0; |
| 1918 | rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift); |
| 1919 | if (rc) |
| 1920 | goto err_out; |
| 1921 | |
| 1922 | /* step 3: if that xfer mode isn't PIO, set host DMA timings */ |
| 1923 | if (xfer_shift != ATA_SHIFT_PIO) |
| 1924 | ata_host_set_dma(ap, xfer_mode, xfer_shift); |
| 1925 | |
| 1926 | /* step 4: update devices' xfer mode */ |
| 1927 | ata_dev_set_mode(ap, &ap->device[0]); |
| 1928 | ata_dev_set_mode(ap, &ap->device[1]); |
| 1929 | |
| 1930 | if (ap->flags & ATA_FLAG_PORT_DISABLED) |
| 1931 | return; |
| 1932 | |
| 1933 | if (ap->ops->post_set_mode) |
| 1934 | ap->ops->post_set_mode(ap); |
| 1935 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | return; |
| 1937 | |
| 1938 | err_out: |
| 1939 | ata_port_disable(ap); |
| 1940 | } |
| 1941 | |
| 1942 | /** |
| 1943 | * ata_busy_sleep - sleep until BSY clears, or timeout |
| 1944 | * @ap: port containing status register to be polled |
| 1945 | * @tmout_pat: impatience timeout |
| 1946 | * @tmout: overall timeout |
| 1947 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 1948 | * Sleep until ATA Status register bit BSY clears, |
| 1949 | * or a timeout occurs. |
| 1950 | * |
| 1951 | * LOCKING: None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | * |
| 1953 | */ |
| 1954 | |
| 1955 | static unsigned int ata_busy_sleep (struct ata_port *ap, |
| 1956 | unsigned long tmout_pat, |
| 1957 | unsigned long tmout) |
| 1958 | { |
| 1959 | unsigned long timer_start, timeout; |
| 1960 | u8 status; |
| 1961 | |
| 1962 | status = ata_busy_wait(ap, ATA_BUSY, 300); |
| 1963 | timer_start = jiffies; |
| 1964 | timeout = timer_start + tmout_pat; |
| 1965 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1966 | msleep(50); |
| 1967 | status = ata_busy_wait(ap, ATA_BUSY, 3); |
| 1968 | } |
| 1969 | |
| 1970 | if (status & ATA_BUSY) |
| 1971 | printk(KERN_WARNING "ata%u is slow to respond, " |
| 1972 | "please be patient\n", ap->id); |
| 1973 | |
| 1974 | timeout = timer_start + tmout; |
| 1975 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { |
| 1976 | msleep(50); |
| 1977 | status = ata_chk_status(ap); |
| 1978 | } |
| 1979 | |
| 1980 | if (status & ATA_BUSY) { |
| 1981 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", |
| 1982 | ap->id, tmout / HZ); |
| 1983 | return 1; |
| 1984 | } |
| 1985 | |
| 1986 | return 0; |
| 1987 | } |
| 1988 | |
| 1989 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) |
| 1990 | { |
| 1991 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1992 | unsigned int dev0 = devmask & (1 << 0); |
| 1993 | unsigned int dev1 = devmask & (1 << 1); |
| 1994 | unsigned long timeout; |
| 1995 | |
| 1996 | /* if device 0 was found in ata_devchk, wait for its |
| 1997 | * BSY bit to clear |
| 1998 | */ |
| 1999 | if (dev0) |
| 2000 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 2001 | |
| 2002 | /* if device 1 was found in ata_devchk, wait for |
| 2003 | * register access, then wait for BSY to clear |
| 2004 | */ |
| 2005 | timeout = jiffies + ATA_TMOUT_BOOT; |
| 2006 | while (dev1) { |
| 2007 | u8 nsect, lbal; |
| 2008 | |
| 2009 | ap->ops->dev_select(ap, 1); |
| 2010 | if (ap->flags & ATA_FLAG_MMIO) { |
| 2011 | nsect = readb((void __iomem *) ioaddr->nsect_addr); |
| 2012 | lbal = readb((void __iomem *) ioaddr->lbal_addr); |
| 2013 | } else { |
| 2014 | nsect = inb(ioaddr->nsect_addr); |
| 2015 | lbal = inb(ioaddr->lbal_addr); |
| 2016 | } |
| 2017 | if ((nsect == 1) && (lbal == 1)) |
| 2018 | break; |
| 2019 | if (time_after(jiffies, timeout)) { |
| 2020 | dev1 = 0; |
| 2021 | break; |
| 2022 | } |
| 2023 | msleep(50); /* give drive a breather */ |
| 2024 | } |
| 2025 | if (dev1) |
| 2026 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 2027 | |
| 2028 | /* is all this really necessary? */ |
| 2029 | ap->ops->dev_select(ap, 0); |
| 2030 | if (dev1) |
| 2031 | ap->ops->dev_select(ap, 1); |
| 2032 | if (dev0) |
| 2033 | ap->ops->dev_select(ap, 0); |
| 2034 | } |
| 2035 | |
| 2036 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2037 | * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command. |
| 2038 | * @ap: Port to reset and probe |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2040 | * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and |
| 2041 | * probe the bus. Not often used these days. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | * |
| 2043 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2044 | * PCI/etc. bus probe sem. |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 2045 | * Obtains host_set lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | * |
| 2047 | */ |
| 2048 | |
| 2049 | static unsigned int ata_bus_edd(struct ata_port *ap) |
| 2050 | { |
| 2051 | struct ata_taskfile tf; |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 2052 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | |
| 2054 | /* set up execute-device-diag (bus reset) taskfile */ |
| 2055 | /* also, take interrupts to a known state (disabled) */ |
| 2056 | DPRINTK("execute-device-diag\n"); |
| 2057 | ata_tf_init(ap, &tf, 0); |
| 2058 | tf.ctl |= ATA_NIEN; |
| 2059 | tf.command = ATA_CMD_EDD; |
| 2060 | tf.protocol = ATA_PROT_NODATA; |
| 2061 | |
| 2062 | /* do bus reset */ |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 2063 | spin_lock_irqsave(&ap->host_set->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | ata_tf_to_host(ap, &tf); |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 2065 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | |
| 2067 | /* spec says at least 2ms. but who knows with those |
| 2068 | * crazy ATAPI devices... |
| 2069 | */ |
| 2070 | msleep(150); |
| 2071 | |
| 2072 | return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); |
| 2073 | } |
| 2074 | |
| 2075 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
| 2076 | unsigned int devmask) |
| 2077 | { |
| 2078 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2079 | |
| 2080 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); |
| 2081 | |
| 2082 | /* software reset. causes dev0 to be selected */ |
| 2083 | if (ap->flags & ATA_FLAG_MMIO) { |
| 2084 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 2085 | udelay(20); /* FIXME: flush */ |
| 2086 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); |
| 2087 | udelay(20); /* FIXME: flush */ |
| 2088 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 2089 | } else { |
| 2090 | outb(ap->ctl, ioaddr->ctl_addr); |
| 2091 | udelay(10); |
| 2092 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 2093 | udelay(10); |
| 2094 | outb(ap->ctl, ioaddr->ctl_addr); |
| 2095 | } |
| 2096 | |
| 2097 | /* spec mandates ">= 2ms" before checking status. |
| 2098 | * We wait 150ms, because that was the magic delay used for |
| 2099 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time |
| 2100 | * between when the ATA command register is written, and then |
| 2101 | * status is checked. Because waiting for "a while" before |
| 2102 | * checking status is fine, post SRST, we perform this magic |
| 2103 | * delay here as well. |
| 2104 | */ |
| 2105 | msleep(150); |
| 2106 | |
| 2107 | ata_bus_post_reset(ap, devmask); |
| 2108 | |
| 2109 | return 0; |
| 2110 | } |
| 2111 | |
| 2112 | /** |
| 2113 | * ata_bus_reset - reset host port and associated ATA channel |
| 2114 | * @ap: port to reset |
| 2115 | * |
| 2116 | * This is typically the first time we actually start issuing |
| 2117 | * commands to the ATA channel. We wait for BSY to clear, then |
| 2118 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its |
| 2119 | * result. Determine what devices, if any, are on the channel |
| 2120 | * by looking at the device 0/1 error register. Look at the signature |
| 2121 | * stored in each device's taskfile registers, to determine if |
| 2122 | * the device is ATA or ATAPI. |
| 2123 | * |
| 2124 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2125 | * PCI/etc. bus probe sem. |
| 2126 | * Obtains host_set lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | * |
| 2128 | * SIDE EFFECTS: |
| 2129 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. |
| 2130 | */ |
| 2131 | |
| 2132 | void ata_bus_reset(struct ata_port *ap) |
| 2133 | { |
| 2134 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2135 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 2136 | u8 err; |
| 2137 | unsigned int dev0, dev1 = 0, rc = 0, devmask = 0; |
| 2138 | |
| 2139 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); |
| 2140 | |
| 2141 | /* determine if device 0/1 are present */ |
| 2142 | if (ap->flags & ATA_FLAG_SATA_RESET) |
| 2143 | dev0 = 1; |
| 2144 | else { |
| 2145 | dev0 = ata_devchk(ap, 0); |
| 2146 | if (slave_possible) |
| 2147 | dev1 = ata_devchk(ap, 1); |
| 2148 | } |
| 2149 | |
| 2150 | if (dev0) |
| 2151 | devmask |= (1 << 0); |
| 2152 | if (dev1) |
| 2153 | devmask |= (1 << 1); |
| 2154 | |
| 2155 | /* select device 0 again */ |
| 2156 | ap->ops->dev_select(ap, 0); |
| 2157 | |
| 2158 | /* issue bus reset */ |
| 2159 | if (ap->flags & ATA_FLAG_SRST) |
| 2160 | rc = ata_bus_softreset(ap, devmask); |
| 2161 | else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) { |
| 2162 | /* set up device control */ |
| 2163 | if (ap->flags & ATA_FLAG_MMIO) |
| 2164 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 2165 | else |
| 2166 | outb(ap->ctl, ioaddr->ctl_addr); |
| 2167 | rc = ata_bus_edd(ap); |
| 2168 | } |
| 2169 | |
| 2170 | if (rc) |
| 2171 | goto err_out; |
| 2172 | |
| 2173 | /* |
| 2174 | * determine by signature whether we have ATA or ATAPI devices |
| 2175 | */ |
| 2176 | err = ata_dev_try_classify(ap, 0); |
| 2177 | if ((slave_possible) && (err != 0x81)) |
| 2178 | ata_dev_try_classify(ap, 1); |
| 2179 | |
| 2180 | /* re-enable interrupts */ |
| 2181 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ |
| 2182 | ata_irq_on(ap); |
| 2183 | |
| 2184 | /* is double-select really necessary? */ |
| 2185 | if (ap->device[1].class != ATA_DEV_NONE) |
| 2186 | ap->ops->dev_select(ap, 1); |
| 2187 | if (ap->device[0].class != ATA_DEV_NONE) |
| 2188 | ap->ops->dev_select(ap, 0); |
| 2189 | |
| 2190 | /* if no devices were detected, disable this port */ |
| 2191 | if ((ap->device[0].class == ATA_DEV_NONE) && |
| 2192 | (ap->device[1].class == ATA_DEV_NONE)) |
| 2193 | goto err_out; |
| 2194 | |
| 2195 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { |
| 2196 | /* set up device control for ATA_FLAG_SATA_RESET */ |
| 2197 | if (ap->flags & ATA_FLAG_MMIO) |
| 2198 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); |
| 2199 | else |
| 2200 | outb(ap->ctl, ioaddr->ctl_addr); |
| 2201 | } |
| 2202 | |
| 2203 | DPRINTK("EXIT\n"); |
| 2204 | return; |
| 2205 | |
| 2206 | err_out: |
| 2207 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); |
| 2208 | ap->ops->port_disable(ap); |
| 2209 | |
| 2210 | DPRINTK("EXIT\n"); |
| 2211 | } |
| 2212 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2213 | static void ata_pr_blacklisted(const struct ata_port *ap, |
| 2214 | const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | { |
| 2216 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", |
| 2217 | ap->id, dev->devno); |
| 2218 | } |
| 2219 | |
Arjan van de Ven | 98ac62d | 2005-11-28 10:06:23 +0100 | [diff] [blame] | 2220 | static const char * const ata_dma_blacklist [] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | "WDC AC11000H", |
| 2222 | "WDC AC22100H", |
| 2223 | "WDC AC32500H", |
| 2224 | "WDC AC33100H", |
| 2225 | "WDC AC31600H", |
| 2226 | "WDC AC32100H", |
| 2227 | "WDC AC23200L", |
| 2228 | "Compaq CRD-8241B", |
| 2229 | "CRD-8400B", |
| 2230 | "CRD-8480B", |
| 2231 | "CRD-8482B", |
| 2232 | "CRD-84", |
| 2233 | "SanDisk SDP3B", |
| 2234 | "SanDisk SDP3B-64", |
| 2235 | "SANYO CD-ROM CRD", |
| 2236 | "HITACHI CDR-8", |
| 2237 | "HITACHI CDR-8335", |
| 2238 | "HITACHI CDR-8435", |
| 2239 | "Toshiba CD-ROM XM-6202B", |
Jeff Garzik | e922256 | 2005-06-28 00:03:37 -0400 | [diff] [blame] | 2240 | "TOSHIBA CD-ROM XM-1702BC", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | "CD-532E-A", |
| 2242 | "E-IDE CD-ROM CR-840", |
| 2243 | "CD-ROM Drive/F5A", |
| 2244 | "WPI CDD-820", |
| 2245 | "SAMSUNG CD-ROM SC-148C", |
| 2246 | "SAMSUNG CD-ROM SC", |
| 2247 | "SanDisk SDP3B-64", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | "ATAPI CD-ROM DRIVE 40X MAXIMUM", |
| 2249 | "_NEC DV5800A", |
| 2250 | }; |
| 2251 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2252 | static int ata_dma_blacklisted(const struct ata_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | { |
| 2254 | unsigned char model_num[40]; |
| 2255 | char *s; |
| 2256 | unsigned int len; |
| 2257 | int i; |
| 2258 | |
| 2259 | ata_dev_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
| 2260 | sizeof(model_num)); |
| 2261 | s = &model_num[0]; |
| 2262 | len = strnlen(s, sizeof(model_num)); |
| 2263 | |
| 2264 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ |
| 2265 | while ((len > 0) && (s[len - 1] == ' ')) { |
| 2266 | len--; |
| 2267 | s[len] = 0; |
| 2268 | } |
| 2269 | |
| 2270 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++) |
| 2271 | if (!strncmp(ata_dma_blacklist[i], s, len)) |
| 2272 | return 1; |
| 2273 | |
| 2274 | return 0; |
| 2275 | } |
| 2276 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2277 | static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | { |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2279 | const struct ata_device *master, *slave; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | unsigned int mask; |
| 2281 | |
| 2282 | master = &ap->device[0]; |
| 2283 | slave = &ap->device[1]; |
| 2284 | |
| 2285 | assert (ata_dev_present(master) || ata_dev_present(slave)); |
| 2286 | |
| 2287 | if (shift == ATA_SHIFT_UDMA) { |
| 2288 | mask = ap->udma_mask; |
| 2289 | if (ata_dev_present(master)) { |
| 2290 | mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2291 | if (ata_dma_blacklisted(master)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | mask = 0; |
| 2293 | ata_pr_blacklisted(ap, master); |
| 2294 | } |
| 2295 | } |
| 2296 | if (ata_dev_present(slave)) { |
| 2297 | mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2298 | if (ata_dma_blacklisted(slave)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | mask = 0; |
| 2300 | ata_pr_blacklisted(ap, slave); |
| 2301 | } |
| 2302 | } |
| 2303 | } |
| 2304 | else if (shift == ATA_SHIFT_MWDMA) { |
| 2305 | mask = ap->mwdma_mask; |
| 2306 | if (ata_dev_present(master)) { |
| 2307 | mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2308 | if (ata_dma_blacklisted(master)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | mask = 0; |
| 2310 | ata_pr_blacklisted(ap, master); |
| 2311 | } |
| 2312 | } |
| 2313 | if (ata_dev_present(slave)) { |
| 2314 | mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2315 | if (ata_dma_blacklisted(slave)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | mask = 0; |
| 2317 | ata_pr_blacklisted(ap, slave); |
| 2318 | } |
| 2319 | } |
| 2320 | } |
| 2321 | else if (shift == ATA_SHIFT_PIO) { |
| 2322 | mask = ap->pio_mask; |
| 2323 | if (ata_dev_present(master)) { |
| 2324 | /* spec doesn't return explicit support for |
| 2325 | * PIO0-2, so we fake it |
| 2326 | */ |
| 2327 | u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03; |
| 2328 | tmp_mode <<= 3; |
| 2329 | tmp_mode |= 0x7; |
| 2330 | mask &= tmp_mode; |
| 2331 | } |
| 2332 | if (ata_dev_present(slave)) { |
| 2333 | /* spec doesn't return explicit support for |
| 2334 | * PIO0-2, so we fake it |
| 2335 | */ |
| 2336 | u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03; |
| 2337 | tmp_mode <<= 3; |
| 2338 | tmp_mode |= 0x7; |
| 2339 | mask &= tmp_mode; |
| 2340 | } |
| 2341 | } |
| 2342 | else { |
| 2343 | mask = 0xffffffff; /* shut up compiler warning */ |
| 2344 | BUG(); |
| 2345 | } |
| 2346 | |
| 2347 | return mask; |
| 2348 | } |
| 2349 | |
| 2350 | /* find greatest bit */ |
| 2351 | static int fgb(u32 bitmap) |
| 2352 | { |
| 2353 | unsigned int i; |
| 2354 | int x = -1; |
| 2355 | |
| 2356 | for (i = 0; i < 32; i++) |
| 2357 | if (bitmap & (1 << i)) |
| 2358 | x = i; |
| 2359 | |
| 2360 | return x; |
| 2361 | } |
| 2362 | |
| 2363 | /** |
| 2364 | * ata_choose_xfer_mode - attempt to find best transfer mode |
| 2365 | * @ap: Port for which an xfer mode will be selected |
| 2366 | * @xfer_mode_out: (output) SET FEATURES - XFER MODE code |
| 2367 | * @xfer_shift_out: (output) bit shift that selects this mode |
| 2368 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2369 | * Based on host and device capabilities, determine the |
| 2370 | * maximum transfer mode that is amenable to all. |
| 2371 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2373 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | * |
| 2375 | * RETURNS: |
| 2376 | * Zero on success, negative on error. |
| 2377 | */ |
| 2378 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2379 | static int ata_choose_xfer_mode(const struct ata_port *ap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | u8 *xfer_mode_out, |
| 2381 | unsigned int *xfer_shift_out) |
| 2382 | { |
| 2383 | unsigned int mask, shift; |
| 2384 | int x, i; |
| 2385 | |
| 2386 | for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) { |
| 2387 | shift = xfer_mode_classes[i].shift; |
| 2388 | mask = ata_get_mode_mask(ap, shift); |
| 2389 | |
| 2390 | x = fgb(mask); |
| 2391 | if (x >= 0) { |
| 2392 | *xfer_mode_out = xfer_mode_classes[i].base + x; |
| 2393 | *xfer_shift_out = shift; |
| 2394 | return 0; |
| 2395 | } |
| 2396 | } |
| 2397 | |
| 2398 | return -1; |
| 2399 | } |
| 2400 | |
| 2401 | /** |
| 2402 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
| 2403 | * @ap: Port associated with device @dev |
| 2404 | * @dev: Device to which command will be sent |
| 2405 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2406 | * Issue SET FEATURES - XFER MODE command to device @dev |
| 2407 | * on port @ap. |
| 2408 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2410 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | */ |
| 2412 | |
| 2413 | static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) |
| 2414 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2415 | struct ata_taskfile tf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | |
| 2417 | /* set up set-features taskfile */ |
| 2418 | DPRINTK("set features - xfer mode\n"); |
| 2419 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2420 | ata_tf_init(ap, &tf, dev->devno); |
| 2421 | tf.command = ATA_CMD_SET_FEATURES; |
| 2422 | tf.feature = SETFEATURES_XFER; |
| 2423 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2424 | tf.protocol = ATA_PROT_NODATA; |
| 2425 | tf.nsect = dev->xfer_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2427 | if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) { |
| 2428 | printk(KERN_ERR "ata%u: failed to set xfermode, disabled\n", |
| 2429 | ap->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | ata_port_disable(ap); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2431 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | |
| 2433 | DPRINTK("EXIT\n"); |
| 2434 | } |
| 2435 | |
| 2436 | /** |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2437 | * ata_dev_reread_id - Reread the device identify device info |
| 2438 | * @ap: port where the device is |
| 2439 | * @dev: device to reread the identify device info |
| 2440 | * |
| 2441 | * LOCKING: |
| 2442 | */ |
| 2443 | |
| 2444 | static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev) |
| 2445 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2446 | struct ata_taskfile tf; |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2447 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2448 | ata_tf_init(ap, &tf, dev->devno); |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2449 | |
| 2450 | if (dev->class == ATA_DEV_ATA) { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2451 | tf.command = ATA_CMD_ID_ATA; |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2452 | DPRINTK("do ATA identify\n"); |
| 2453 | } else { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2454 | tf.command = ATA_CMD_ID_ATAPI; |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2455 | DPRINTK("do ATAPI identify\n"); |
| 2456 | } |
| 2457 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2458 | tf.flags |= ATA_TFLAG_DEVICE; |
| 2459 | tf.protocol = ATA_PROT_PIO; |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2460 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2461 | if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, |
| 2462 | dev->id, sizeof(dev->id))) |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2463 | goto err_out; |
| 2464 | |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2465 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
| 2466 | |
| 2467 | ata_dump_id(dev); |
| 2468 | |
| 2469 | DPRINTK("EXIT\n"); |
| 2470 | |
| 2471 | return; |
| 2472 | err_out: |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2473 | printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id); |
Albert Lee | 59a10b1 | 2005-10-12 15:09:42 +0800 | [diff] [blame] | 2474 | ata_port_disable(ap); |
| 2475 | } |
| 2476 | |
| 2477 | /** |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2478 | * ata_dev_init_params - Issue INIT DEV PARAMS command |
| 2479 | * @ap: Port associated with device @dev |
| 2480 | * @dev: Device to which command will be sent |
| 2481 | * |
| 2482 | * LOCKING: |
| 2483 | */ |
| 2484 | |
| 2485 | static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev) |
| 2486 | { |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2487 | struct ata_taskfile tf; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2488 | u16 sectors = dev->id[6]; |
| 2489 | u16 heads = dev->id[3]; |
| 2490 | |
| 2491 | /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| 2492 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
| 2493 | return; |
| 2494 | |
| 2495 | /* set up init dev params taskfile */ |
| 2496 | DPRINTK("init dev params \n"); |
| 2497 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2498 | ata_tf_init(ap, &tf, dev->devno); |
| 2499 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| 2500 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2501 | tf.protocol = ATA_PROT_NODATA; |
| 2502 | tf.nsect = sectors; |
| 2503 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2504 | |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2505 | if (ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0)) { |
| 2506 | printk(KERN_ERR "ata%u: failed to init parameters, disabled\n", |
| 2507 | ap->id); |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2508 | ata_port_disable(ap); |
Tejun Heo | a012370 | 2005-12-13 14:49:31 +0900 | [diff] [blame] | 2509 | } |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2510 | |
| 2511 | DPRINTK("EXIT\n"); |
| 2512 | } |
| 2513 | |
| 2514 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2515 | * ata_sg_clean - Unmap DMA memory associated with command |
| 2516 | * @qc: Command containing DMA memory to be released |
| 2517 | * |
| 2518 | * Unmap all mapped DMA memory associated with this command. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | * |
| 2520 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2521 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | */ |
| 2523 | |
| 2524 | static void ata_sg_clean(struct ata_queued_cmd *qc) |
| 2525 | { |
| 2526 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2527 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2528 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2529 | void *pad_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | |
| 2531 | assert(qc->flags & ATA_QCFLAG_DMAMAP); |
| 2532 | assert(sg != NULL); |
| 2533 | |
| 2534 | if (qc->flags & ATA_QCFLAG_SINGLE) |
| 2535 | assert(qc->n_elem == 1); |
| 2536 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 2537 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2539 | /* if we padded the buffer out to 32-bit bound, and data |
| 2540 | * xfer direction is from-device, we must copy from the |
| 2541 | * pad buffer back into the supplied buffer |
| 2542 | */ |
| 2543 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) |
| 2544 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 2545 | |
| 2546 | if (qc->flags & ATA_QCFLAG_SG) { |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2547 | if (qc->n_elem) |
| 2548 | dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2549 | /* restore last sg */ |
| 2550 | sg[qc->orig_n_elem - 1].length += qc->pad_len; |
| 2551 | if (pad_buf) { |
| 2552 | struct scatterlist *psg = &qc->pad_sgent; |
| 2553 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 2554 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 2555 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2556 | } |
| 2557 | } else { |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2558 | if (sg_dma_len(&sg[0]) > 0) |
| 2559 | dma_unmap_single(ap->host_set->dev, |
| 2560 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
| 2561 | dir); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2562 | /* restore sg */ |
| 2563 | sg->length += qc->pad_len; |
| 2564 | if (pad_buf) |
| 2565 | memcpy(qc->buf_virt + sg->length - qc->pad_len, |
| 2566 | pad_buf, qc->pad_len); |
| 2567 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | |
| 2569 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2570 | qc->__sg = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | } |
| 2572 | |
| 2573 | /** |
| 2574 | * ata_fill_sg - Fill PCI IDE PRD table |
| 2575 | * @qc: Metadata associated with taskfile to be transferred |
| 2576 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2577 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2578 | * associated with the current disk command. |
| 2579 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | * LOCKING: |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2581 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | * |
| 2583 | */ |
| 2584 | static void ata_fill_sg(struct ata_queued_cmd *qc) |
| 2585 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2587 | struct scatterlist *sg; |
| 2588 | unsigned int idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2590 | assert(qc->__sg != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | assert(qc->n_elem > 0); |
| 2592 | |
| 2593 | idx = 0; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2594 | ata_for_each_sg(sg, qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | u32 addr, offset; |
| 2596 | u32 sg_len, len; |
| 2597 | |
| 2598 | /* determine if physical DMA addr spans 64K boundary. |
| 2599 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2600 | * truncate dma_addr_t to u32. |
| 2601 | */ |
| 2602 | addr = (u32) sg_dma_address(sg); |
| 2603 | sg_len = sg_dma_len(sg); |
| 2604 | |
| 2605 | while (sg_len) { |
| 2606 | offset = addr & 0xffff; |
| 2607 | len = sg_len; |
| 2608 | if ((offset + sg_len) > 0x10000) |
| 2609 | len = 0x10000 - offset; |
| 2610 | |
| 2611 | ap->prd[idx].addr = cpu_to_le32(addr); |
| 2612 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); |
| 2613 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); |
| 2614 | |
| 2615 | idx++; |
| 2616 | sg_len -= len; |
| 2617 | addr += len; |
| 2618 | } |
| 2619 | } |
| 2620 | |
| 2621 | if (idx) |
| 2622 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
| 2623 | } |
| 2624 | /** |
| 2625 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| 2626 | * @qc: Metadata associated with taskfile to check |
| 2627 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2628 | * Allow low-level driver to filter ATA PACKET commands, returning |
| 2629 | * a status indicating whether or not it is OK to use DMA for the |
| 2630 | * supplied PACKET command. |
| 2631 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2633 | * spin_lock_irqsave(host_set lock) |
| 2634 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2635 | * RETURNS: 0 when ATAPI DMA can be used |
| 2636 | * nonzero otherwise |
| 2637 | */ |
| 2638 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| 2639 | { |
| 2640 | struct ata_port *ap = qc->ap; |
| 2641 | int rc = 0; /* Assume ATAPI DMA is OK by default */ |
| 2642 | |
| 2643 | if (ap->ops->check_atapi_dma) |
| 2644 | rc = ap->ops->check_atapi_dma(qc); |
| 2645 | |
| 2646 | return rc; |
| 2647 | } |
| 2648 | /** |
| 2649 | * ata_qc_prep - Prepare taskfile for submission |
| 2650 | * @qc: Metadata associated with taskfile to be prepared |
| 2651 | * |
Jeff Garzik | 780a87f | 2005-05-30 15:41:05 -0400 | [diff] [blame] | 2652 | * Prepare ATA taskfile for submission. |
| 2653 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | * LOCKING: |
| 2655 | * spin_lock_irqsave(host_set lock) |
| 2656 | */ |
| 2657 | void ata_qc_prep(struct ata_queued_cmd *qc) |
| 2658 | { |
| 2659 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2660 | return; |
| 2661 | |
| 2662 | ata_fill_sg(qc); |
| 2663 | } |
| 2664 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2665 | /** |
| 2666 | * ata_sg_init_one - Associate command with memory buffer |
| 2667 | * @qc: Command to be associated |
| 2668 | * @buf: Memory buffer |
| 2669 | * @buflen: Length of memory buffer, in bytes. |
| 2670 | * |
| 2671 | * Initialize the data-related elements of queued_cmd @qc |
| 2672 | * to point to a single memory buffer, @buf of byte length @buflen. |
| 2673 | * |
| 2674 | * LOCKING: |
| 2675 | * spin_lock_irqsave(host_set lock) |
| 2676 | */ |
| 2677 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
| 2679 | { |
| 2680 | struct scatterlist *sg; |
| 2681 | |
| 2682 | qc->flags |= ATA_QCFLAG_SINGLE; |
| 2683 | |
| 2684 | memset(&qc->sgent, 0, sizeof(qc->sgent)); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2685 | qc->__sg = &qc->sgent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | qc->n_elem = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2687 | qc->orig_n_elem = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2688 | qc->buf_virt = buf; |
| 2689 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2690 | sg = qc->__sg; |
Jeff Garzik | f0612bb | 2005-10-30 01:58:18 -0500 | [diff] [blame] | 2691 | sg_init_one(sg, buf, buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | } |
| 2693 | |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2694 | /** |
| 2695 | * ata_sg_init - Associate command with scatter-gather table. |
| 2696 | * @qc: Command to be associated |
| 2697 | * @sg: Scatter-gather table. |
| 2698 | * @n_elem: Number of elements in s/g table. |
| 2699 | * |
| 2700 | * Initialize the data-related elements of queued_cmd @qc |
| 2701 | * to point to a scatter-gather table @sg, containing @n_elem |
| 2702 | * elements. |
| 2703 | * |
| 2704 | * LOCKING: |
| 2705 | * spin_lock_irqsave(host_set lock) |
| 2706 | */ |
| 2707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2708 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 2709 | unsigned int n_elem) |
| 2710 | { |
| 2711 | qc->flags |= ATA_QCFLAG_SG; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2712 | qc->__sg = sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2713 | qc->n_elem = n_elem; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2714 | qc->orig_n_elem = n_elem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | } |
| 2716 | |
| 2717 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2718 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
| 2719 | * @qc: Command with memory buffer to be mapped. |
| 2720 | * |
| 2721 | * DMA-map the memory buffer associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2722 | * |
| 2723 | * LOCKING: |
| 2724 | * spin_lock_irqsave(host_set lock) |
| 2725 | * |
| 2726 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2727 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2728 | */ |
| 2729 | |
| 2730 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) |
| 2731 | { |
| 2732 | struct ata_port *ap = qc->ap; |
| 2733 | int dir = qc->dma_dir; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2734 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2735 | dma_addr_t dma_address; |
| 2736 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2737 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 2738 | qc->pad_len = sg->length & 3; |
| 2739 | if (qc->pad_len) { |
| 2740 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 2741 | struct scatterlist *psg = &qc->pad_sgent; |
| 2742 | |
| 2743 | assert(qc->dev->class == ATA_DEV_ATAPI); |
| 2744 | |
| 2745 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 2746 | |
| 2747 | if (qc->tf.flags & ATA_TFLAG_WRITE) |
| 2748 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, |
| 2749 | qc->pad_len); |
| 2750 | |
| 2751 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 2752 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 2753 | /* trim sg */ |
| 2754 | sg->length -= qc->pad_len; |
| 2755 | |
| 2756 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", |
| 2757 | sg->length, qc->pad_len); |
| 2758 | } |
| 2759 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2760 | if (!sg->length) { |
| 2761 | sg_dma_address(sg) = 0; |
| 2762 | goto skip_map; |
| 2763 | } |
| 2764 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2766 | sg->length, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 2767 | if (dma_mapping_error(dma_address)) { |
| 2768 | /* restore sg */ |
| 2769 | sg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 2771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | |
| 2773 | sg_dma_address(sg) = dma_address; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2774 | skip_map: |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 2775 | sg_dma_len(sg) = sg->length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | |
| 2777 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
| 2778 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 2779 | |
| 2780 | return 0; |
| 2781 | } |
| 2782 | |
| 2783 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2784 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| 2785 | * @qc: Command with scatter-gather table to be mapped. |
| 2786 | * |
| 2787 | * DMA-map the scatter-gather table associated with queued_cmd @qc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2788 | * |
| 2789 | * LOCKING: |
| 2790 | * spin_lock_irqsave(host_set lock) |
| 2791 | * |
| 2792 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2793 | * Zero on success, negative on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | * |
| 2795 | */ |
| 2796 | |
| 2797 | static int ata_sg_setup(struct ata_queued_cmd *qc) |
| 2798 | { |
| 2799 | struct ata_port *ap = qc->ap; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2800 | struct scatterlist *sg = qc->__sg; |
| 2801 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2802 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | |
| 2804 | VPRINTK("ENTER, ata%u\n", ap->id); |
| 2805 | assert(qc->flags & ATA_QCFLAG_SG); |
| 2806 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2807 | /* we must lengthen transfers to end on a 32-bit boundary */ |
| 2808 | qc->pad_len = lsg->length & 3; |
| 2809 | if (qc->pad_len) { |
| 2810 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); |
| 2811 | struct scatterlist *psg = &qc->pad_sgent; |
| 2812 | unsigned int offset; |
| 2813 | |
| 2814 | assert(qc->dev->class == ATA_DEV_ATAPI); |
| 2815 | |
| 2816 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); |
| 2817 | |
| 2818 | /* |
| 2819 | * psg->page/offset are used to copy to-be-written |
| 2820 | * data in this function or read data in ata_sg_clean. |
| 2821 | */ |
| 2822 | offset = lsg->offset + lsg->length - qc->pad_len; |
| 2823 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); |
| 2824 | psg->offset = offset_in_page(offset); |
| 2825 | |
| 2826 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 2827 | void *addr = kmap_atomic(psg->page, KM_IRQ0); |
| 2828 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); |
Mark Lord | dfa1598 | 2005-12-12 23:19:28 -0500 | [diff] [blame] | 2829 | kunmap_atomic(addr, KM_IRQ0); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2830 | } |
| 2831 | |
| 2832 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); |
| 2833 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; |
| 2834 | /* trim last sg */ |
| 2835 | lsg->length -= qc->pad_len; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2836 | if (lsg->length == 0) |
| 2837 | trim_sg = 1; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 2838 | |
| 2839 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", |
| 2840 | qc->n_elem - 1, lsg->length, qc->pad_len); |
| 2841 | } |
| 2842 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2843 | pre_n_elem = qc->n_elem; |
| 2844 | if (trim_sg && pre_n_elem) |
| 2845 | pre_n_elem--; |
| 2846 | |
| 2847 | if (!pre_n_elem) { |
| 2848 | n_elem = 0; |
| 2849 | goto skip_map; |
| 2850 | } |
| 2851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | dir = qc->dma_dir; |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2853 | n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir); |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 2854 | if (n_elem < 1) { |
| 2855 | /* restore last sg */ |
| 2856 | lsg->length += qc->pad_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | return -1; |
Tejun Heo | 537a95d | 2005-11-05 14:29:01 -0500 | [diff] [blame] | 2858 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | |
| 2860 | DPRINTK("%d sg elements mapped\n", n_elem); |
| 2861 | |
Jeff Garzik | e1410f2 | 2005-11-14 14:06:26 -0500 | [diff] [blame] | 2862 | skip_map: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | qc->n_elem = n_elem; |
| 2864 | |
| 2865 | return 0; |
| 2866 | } |
| 2867 | |
| 2868 | /** |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2869 | * ata_poll_qc_complete - turn irq back on and finish qc |
| 2870 | * @qc: Command to complete |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 2871 | * @err_mask: ATA status register content |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2872 | * |
| 2873 | * LOCKING: |
| 2874 | * None. (grabs host lock) |
| 2875 | */ |
| 2876 | |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 2877 | void ata_poll_qc_complete(struct ata_queued_cmd *qc) |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2878 | { |
| 2879 | struct ata_port *ap = qc->ap; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2880 | unsigned long flags; |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2881 | |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2882 | spin_lock_irqsave(&ap->host_set->lock, flags); |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2883 | ata_irq_on(ap); |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 2884 | ata_qc_complete(qc); |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 2885 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
Tejun Heo | 40e8c82 | 2005-08-22 17:12:45 +0900 | [diff] [blame] | 2886 | } |
| 2887 | |
| 2888 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | * ata_pio_poll - |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 2890 | * @ap: the target ata_port |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | * |
| 2892 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2893 | * None. (executing in kernel thread context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2894 | * |
| 2895 | * RETURNS: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 2896 | * timeout value to use |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | */ |
| 2898 | |
| 2899 | static unsigned long ata_pio_poll(struct ata_port *ap) |
| 2900 | { |
Albert Lee | c14b833 | 2005-12-05 15:36:08 +0800 | [diff] [blame] | 2901 | struct ata_queued_cmd *qc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2902 | u8 status; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2903 | unsigned int poll_state = HSM_ST_UNKNOWN; |
| 2904 | unsigned int reg_state = HSM_ST_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | |
Albert Lee | c14b833 | 2005-12-05 15:36:08 +0800 | [diff] [blame] | 2906 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2907 | assert(qc != NULL); |
| 2908 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2909 | switch (ap->hsm_task_state) { |
| 2910 | case HSM_ST: |
| 2911 | case HSM_ST_POLL: |
| 2912 | poll_state = HSM_ST_POLL; |
| 2913 | reg_state = HSM_ST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2914 | break; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2915 | case HSM_ST_LAST: |
| 2916 | case HSM_ST_LAST_POLL: |
| 2917 | poll_state = HSM_ST_LAST_POLL; |
| 2918 | reg_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | break; |
| 2920 | default: |
| 2921 | BUG(); |
| 2922 | break; |
| 2923 | } |
| 2924 | |
| 2925 | status = ata_chk_status(ap); |
| 2926 | if (status & ATA_BUSY) { |
| 2927 | if (time_after(jiffies, ap->pio_task_timeout)) { |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2928 | qc->err_mask |= AC_ERR_TIMEOUT; |
Albert Lee | 7c39833 | 2005-11-09 13:03:30 +0800 | [diff] [blame] | 2929 | ap->hsm_task_state = HSM_ST_TMOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | return 0; |
| 2931 | } |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2932 | ap->hsm_task_state = poll_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | return ATA_SHORT_PAUSE; |
| 2934 | } |
| 2935 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2936 | ap->hsm_task_state = reg_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2937 | return 0; |
| 2938 | } |
| 2939 | |
| 2940 | /** |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 2941 | * ata_pio_complete - check if drive is busy or idle |
| 2942 | * @ap: the target ata_port |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | * |
| 2944 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 2945 | * None. (executing in kernel thread context) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2946 | * |
| 2947 | * RETURNS: |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 2948 | * Zero if qc completed. |
| 2949 | * Non-zero if has next. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2950 | */ |
| 2951 | |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2952 | static int ata_pio_complete (struct ata_port *ap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | { |
| 2954 | struct ata_queued_cmd *qc; |
| 2955 | u8 drv_stat; |
| 2956 | |
| 2957 | /* |
Alan Cox | 31433ea | 2005-08-26 15:56:47 +0100 | [diff] [blame] | 2958 | * This is purely heuristic. This is a fast path. Sometimes when |
| 2959 | * we enter, BSY will be cleared in a chk-status or two. If not, |
| 2960 | * the drive is probably seeking or something. Snooze for a couple |
| 2961 | * msecs, then chk-status again. If still busy, fall back to |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 2962 | * HSM_ST_LAST_POLL state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2963 | */ |
Albert Lee | fe79e68 | 2005-12-06 11:34:59 +0800 | [diff] [blame] | 2964 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
| 2965 | if (drv_stat & ATA_BUSY) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2966 | msleep(2); |
Albert Lee | fe79e68 | 2005-12-06 11:34:59 +0800 | [diff] [blame] | 2967 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
| 2968 | if (drv_stat & ATA_BUSY) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2969 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2970 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 2971 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | } |
| 2973 | } |
| 2974 | |
Albert Lee | c14b833 | 2005-12-05 15:36:08 +0800 | [diff] [blame] | 2975 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 2976 | assert(qc != NULL); |
| 2977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | drv_stat = ata_wait_idle(ap); |
| 2979 | if (!ata_ok(drv_stat)) { |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 2980 | qc->err_mask |= __ac_err_mask(drv_stat); |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2981 | ap->hsm_task_state = HSM_ST_ERR; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 2982 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | } |
| 2984 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 2985 | ap->hsm_task_state = HSM_ST_IDLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 2987 | assert(qc->err_mask == 0); |
| 2988 | ata_poll_qc_complete(qc); |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 2989 | |
| 2990 | /* another command may start at this point */ |
| 2991 | |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 2992 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2993 | } |
| 2994 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 2995 | |
| 2996 | /** |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 2997 | * swap_buf_le16 - swap halves of 16-words in place |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 2998 | * @buf: Buffer to swap |
| 2999 | * @buf_words: Number of 16-bit words in buffer. |
| 3000 | * |
| 3001 | * Swap halves of 16-bit words if needed to convert from |
| 3002 | * little-endian byte order to native cpu byte order, or |
| 3003 | * vice-versa. |
| 3004 | * |
| 3005 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 3006 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3007 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3008 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| 3009 | { |
| 3010 | #ifdef __BIG_ENDIAN |
| 3011 | unsigned int i; |
| 3012 | |
| 3013 | for (i = 0; i < buf_words; i++) |
| 3014 | buf[i] = le16_to_cpu(buf[i]); |
| 3015 | #endif /* __BIG_ENDIAN */ |
| 3016 | } |
| 3017 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3018 | /** |
| 3019 | * ata_mmio_data_xfer - Transfer data by MMIO |
| 3020 | * @ap: port to read/write |
| 3021 | * @buf: data buffer |
| 3022 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 3023 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3024 | * |
| 3025 | * Transfer data from/to the device data register by MMIO. |
| 3026 | * |
| 3027 | * LOCKING: |
| 3028 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3029 | */ |
| 3030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3031 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 3032 | unsigned int buflen, int write_data) |
| 3033 | { |
| 3034 | unsigned int i; |
| 3035 | unsigned int words = buflen >> 1; |
| 3036 | u16 *buf16 = (u16 *) buf; |
| 3037 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; |
| 3038 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3039 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | if (write_data) { |
| 3041 | for (i = 0; i < words; i++) |
| 3042 | writew(le16_to_cpu(buf16[i]), mmio); |
| 3043 | } else { |
| 3044 | for (i = 0; i < words; i++) |
| 3045 | buf16[i] = cpu_to_le16(readw(mmio)); |
| 3046 | } |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3047 | |
| 3048 | /* Transfer trailing 1 byte, if any. */ |
| 3049 | if (unlikely(buflen & 0x01)) { |
| 3050 | u16 align_buf[1] = { 0 }; |
| 3051 | unsigned char *trailing_buf = buf + buflen - 1; |
| 3052 | |
| 3053 | if (write_data) { |
| 3054 | memcpy(align_buf, trailing_buf, 1); |
| 3055 | writew(le16_to_cpu(align_buf[0]), mmio); |
| 3056 | } else { |
| 3057 | align_buf[0] = cpu_to_le16(readw(mmio)); |
| 3058 | memcpy(trailing_buf, align_buf, 1); |
| 3059 | } |
| 3060 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | } |
| 3062 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3063 | /** |
| 3064 | * ata_pio_data_xfer - Transfer data by PIO |
| 3065 | * @ap: port to read/write |
| 3066 | * @buf: data buffer |
| 3067 | * @buflen: buffer length |
Jeff Garzik | 344baba | 2005-09-07 01:15:17 -0400 | [diff] [blame] | 3068 | * @write_data: read/write |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3069 | * |
| 3070 | * Transfer data from/to the device data register by PIO. |
| 3071 | * |
| 3072 | * LOCKING: |
| 3073 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3074 | */ |
| 3075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3076 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 3077 | unsigned int buflen, int write_data) |
| 3078 | { |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3079 | unsigned int words = buflen >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3080 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3081 | /* Transfer multiple of 2 bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | if (write_data) |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3083 | outsw(ap->ioaddr.data_addr, buf, words); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | else |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3085 | insw(ap->ioaddr.data_addr, buf, words); |
| 3086 | |
| 3087 | /* Transfer trailing 1 byte, if any. */ |
| 3088 | if (unlikely(buflen & 0x01)) { |
| 3089 | u16 align_buf[1] = { 0 }; |
| 3090 | unsigned char *trailing_buf = buf + buflen - 1; |
| 3091 | |
| 3092 | if (write_data) { |
| 3093 | memcpy(align_buf, trailing_buf, 1); |
| 3094 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
| 3095 | } else { |
| 3096 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); |
| 3097 | memcpy(trailing_buf, align_buf, 1); |
| 3098 | } |
| 3099 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | } |
| 3101 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3102 | /** |
| 3103 | * ata_data_xfer - Transfer data from/to the data register. |
| 3104 | * @ap: port to read/write |
| 3105 | * @buf: data buffer |
| 3106 | * @buflen: buffer length |
| 3107 | * @do_write: read/write |
| 3108 | * |
| 3109 | * Transfer data from/to the device data register. |
| 3110 | * |
| 3111 | * LOCKING: |
| 3112 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3113 | */ |
| 3114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3115 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
| 3116 | unsigned int buflen, int do_write) |
| 3117 | { |
Alan Cox | a1bd9e6 | 2006-01-17 20:53:50 +0000 | [diff] [blame] | 3118 | /* Make the crap hardware pay the costs not the good stuff */ |
| 3119 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { |
| 3120 | unsigned long flags; |
| 3121 | local_irq_save(flags); |
| 3122 | if (ap->flags & ATA_FLAG_MMIO) |
| 3123 | ata_mmio_data_xfer(ap, buf, buflen, do_write); |
| 3124 | else |
| 3125 | ata_pio_data_xfer(ap, buf, buflen, do_write); |
| 3126 | local_irq_restore(flags); |
| 3127 | } else { |
| 3128 | if (ap->flags & ATA_FLAG_MMIO) |
| 3129 | ata_mmio_data_xfer(ap, buf, buflen, do_write); |
| 3130 | else |
| 3131 | ata_pio_data_xfer(ap, buf, buflen, do_write); |
| 3132 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3133 | } |
| 3134 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3135 | /** |
| 3136 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. |
| 3137 | * @qc: Command on going |
| 3138 | * |
| 3139 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. |
| 3140 | * |
| 3141 | * LOCKING: |
| 3142 | * Inherited from caller. |
| 3143 | */ |
| 3144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3145 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 3146 | { |
| 3147 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3148 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | struct ata_port *ap = qc->ap; |
| 3150 | struct page *page; |
| 3151 | unsigned int offset; |
| 3152 | unsigned char *buf; |
| 3153 | |
| 3154 | if (qc->cursect == (qc->nsect - 1)) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3155 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | |
| 3157 | page = sg[qc->cursg].page; |
| 3158 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; |
| 3159 | |
| 3160 | /* get the current page and offset */ |
| 3161 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 3162 | offset %= PAGE_SIZE; |
| 3163 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3164 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 3165 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3166 | if (PageHighMem(page)) { |
| 3167 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3168 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3169 | local_irq_save(flags); |
| 3170 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 3171 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3172 | /* do the actual data transfer */ |
| 3173 | ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); |
| 3174 | |
| 3175 | kunmap_atomic(buf, KM_IRQ0); |
| 3176 | local_irq_restore(flags); |
| 3177 | } else { |
| 3178 | buf = page_address(page); |
| 3179 | ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); |
| 3180 | } |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | qc->cursect++; |
| 3183 | qc->cursg_ofs++; |
| 3184 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 3185 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | qc->cursg++; |
| 3187 | qc->cursg_ofs = 0; |
| 3188 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | } |
| 3190 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3191 | /** |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 3192 | * ata_pio_sectors - Transfer one or many 512-byte sectors. |
| 3193 | * @qc: Command on going |
| 3194 | * |
| 3195 | * Transfer one or many ATA_SECT_SIZE of data from/to the |
| 3196 | * ATA device for the DRQ request. |
| 3197 | * |
| 3198 | * LOCKING: |
| 3199 | * Inherited from caller. |
| 3200 | */ |
| 3201 | |
| 3202 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 3203 | { |
| 3204 | if (is_multi_taskfile(&qc->tf)) { |
| 3205 | /* READ/WRITE MULTIPLE */ |
| 3206 | unsigned int nsect; |
| 3207 | |
| 3208 | assert(qc->dev->multi_count); |
| 3209 | |
| 3210 | nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count); |
| 3211 | while (nsect--) |
| 3212 | ata_pio_sector(qc); |
| 3213 | } else |
| 3214 | ata_pio_sector(qc); |
| 3215 | } |
| 3216 | |
| 3217 | /** |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3218 | * atapi_send_cdb - Write CDB bytes to hardware |
| 3219 | * @ap: Port to which ATAPI device is attached. |
| 3220 | * @qc: Taskfile currently active |
| 3221 | * |
| 3222 | * When device has indicated its readiness to accept |
| 3223 | * a CDB, this function is called. Send the CDB. |
| 3224 | * |
| 3225 | * LOCKING: |
| 3226 | * caller. |
| 3227 | */ |
| 3228 | |
| 3229 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 3230 | { |
| 3231 | /* send SCSI cdb */ |
| 3232 | DPRINTK("send cdb\n"); |
| 3233 | assert(ap->cdb_len >= 12); |
| 3234 | |
| 3235 | ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1); |
| 3236 | ata_altstatus(ap); /* flush */ |
| 3237 | |
| 3238 | switch (qc->tf.protocol) { |
| 3239 | case ATA_PROT_ATAPI: |
| 3240 | ap->hsm_task_state = HSM_ST; |
| 3241 | break; |
| 3242 | case ATA_PROT_ATAPI_NODATA: |
| 3243 | ap->hsm_task_state = HSM_ST_LAST; |
| 3244 | break; |
| 3245 | case ATA_PROT_ATAPI_DMA: |
| 3246 | ap->hsm_task_state = HSM_ST_LAST; |
| 3247 | /* initiate bmdma */ |
| 3248 | ap->ops->bmdma_start(qc); |
| 3249 | break; |
| 3250 | } |
| 3251 | } |
| 3252 | |
| 3253 | /** |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3254 | * ata_pio_first_block - Write first data block to hardware |
| 3255 | * @ap: Port to which ATA/ATAPI device is attached. |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3256 | * |
| 3257 | * When device has indicated its readiness to accept |
| 3258 | * the data, this function sends out the CDB or |
| 3259 | * the first data block by PIO. |
| 3260 | * After this, |
| 3261 | * - If polling, ata_pio_task() handles the rest. |
| 3262 | * - Otherwise, interrupt handler takes over. |
| 3263 | * |
| 3264 | * LOCKING: |
| 3265 | * Kernel thread context (may sleep) |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3266 | * |
| 3267 | * RETURNS: |
| 3268 | * Zero if irq handler takes over |
| 3269 | * Non-zero if has next (polling). |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3270 | */ |
| 3271 | |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3272 | static int ata_pio_first_block(struct ata_port *ap) |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3273 | { |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3274 | struct ata_queued_cmd *qc; |
| 3275 | u8 status; |
| 3276 | unsigned long flags; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3277 | int has_next; |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3278 | |
| 3279 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3280 | assert(qc != NULL); |
| 3281 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 3282 | |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3283 | /* if polling, we will stay in the work queue after sending the data. |
| 3284 | * otherwise, interrupt handler takes over after sending the data. |
| 3285 | */ |
| 3286 | has_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 3287 | |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3288 | /* sleep-wait for BSY to clear */ |
| 3289 | DPRINTK("busy wait\n"); |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3290 | if (ata_busy_sleep(ap, ATA_TMOUT_DATAOUT_QUICK, ATA_TMOUT_DATAOUT)) { |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 3291 | qc->err_mask |= AC_ERR_ATA_BUS; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3292 | ap->hsm_task_state = HSM_ST_TMOUT; |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3293 | goto err_out; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3294 | } |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3295 | |
| 3296 | /* make sure DRQ is set */ |
| 3297 | status = ata_chk_status(ap); |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3298 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { |
| 3299 | /* device status error */ |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 3300 | qc->err_mask |= AC_ERR_ATA_BUS; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3301 | ap->hsm_task_state = HSM_ST_ERR; |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3302 | goto err_out; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3303 | } |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3304 | |
| 3305 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 3306 | * During the state transition, interrupt handler shouldn't |
| 3307 | * be invoked before the data transfer is complete and |
| 3308 | * hsm_task_state is changed. Hence, the following locking. |
| 3309 | */ |
| 3310 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 3311 | |
| 3312 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 3313 | /* PIO data out protocol. |
| 3314 | * send first data block. |
| 3315 | */ |
| 3316 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 3317 | /* ata_pio_sectors() might change the state to HSM_ST_LAST. |
| 3318 | * so, the state is changed here before ata_pio_sectors(). |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3319 | */ |
| 3320 | ap->hsm_task_state = HSM_ST; |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 3321 | ata_pio_sectors(qc); |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3322 | ata_altstatus(ap); /* flush */ |
| 3323 | } else |
| 3324 | /* send CDB */ |
| 3325 | atapi_send_cdb(ap, qc); |
| 3326 | |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3327 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 3328 | |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3329 | /* if polling, ata_pio_task() handles the rest. |
| 3330 | * otherwise, interrupt handler takes over from here. |
| 3331 | */ |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3332 | return has_next; |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3333 | |
| 3334 | err_out: |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3335 | return 1; /* has next */ |
Albert Lee | c71c185 | 2005-10-04 06:03:45 -0400 | [diff] [blame] | 3336 | } |
| 3337 | |
| 3338 | /** |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3339 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 3340 | * @qc: Command on going |
| 3341 | * @bytes: number of bytes |
| 3342 | * |
| 3343 | * Transfer Transfer data from/to the ATAPI device. |
| 3344 | * |
| 3345 | * LOCKING: |
| 3346 | * Inherited from caller. |
| 3347 | * |
| 3348 | */ |
| 3349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3350 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 3351 | { |
| 3352 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3353 | struct scatterlist *sg = qc->__sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | struct ata_port *ap = qc->ap; |
| 3355 | struct page *page; |
| 3356 | unsigned char *buf; |
| 3357 | unsigned int offset, count; |
| 3358 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3359 | if (qc->curbytes + bytes >= qc->nbytes) |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3360 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | |
| 3362 | next_sg: |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3363 | if (unlikely(qc->cursg >= qc->n_elem)) { |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3364 | /* |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3365 | * The end of qc->sg is reached and the device expects |
| 3366 | * more data to transfer. In order not to overrun qc->sg |
| 3367 | * and fulfill length specified in the byte count register, |
| 3368 | * - for read case, discard trailing data from the device |
| 3369 | * - for write case, padding zero data to the device |
| 3370 | */ |
| 3371 | u16 pad_buf[1] = { 0 }; |
| 3372 | unsigned int words = bytes >> 1; |
| 3373 | unsigned int i; |
| 3374 | |
| 3375 | if (words) /* warning if bytes > 1 */ |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3376 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3377 | ap->id, bytes); |
| 3378 | |
| 3379 | for (i = 0; i < words; i++) |
| 3380 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); |
| 3381 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3382 | ap->hsm_task_state = HSM_ST_LAST; |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3383 | return; |
| 3384 | } |
| 3385 | |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 3386 | sg = &qc->__sg[qc->cursg]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3388 | page = sg->page; |
| 3389 | offset = sg->offset + qc->cursg_ofs; |
| 3390 | |
| 3391 | /* get the current page and offset */ |
| 3392 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 3393 | offset %= PAGE_SIZE; |
| 3394 | |
Albert Lee | 6952df0 | 2005-06-06 15:56:03 +0800 | [diff] [blame] | 3395 | /* don't overrun current sg */ |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 3396 | count = min(sg->length - qc->cursg_ofs, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3397 | |
| 3398 | /* don't cross page boundaries */ |
| 3399 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 3400 | |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3401 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 3402 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3403 | if (PageHighMem(page)) { |
| 3404 | unsigned long flags; |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3405 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3406 | local_irq_save(flags); |
| 3407 | buf = kmap_atomic(page, KM_IRQ0); |
Albert Lee | 083958d | 2005-10-09 09:47:31 -0400 | [diff] [blame] | 3408 | |
Albert Lee | 91b8b31 | 2005-10-09 09:48:44 -0400 | [diff] [blame] | 3409 | /* do the actual data transfer */ |
| 3410 | ata_data_xfer(ap, buf + offset, count, do_write); |
| 3411 | |
| 3412 | kunmap_atomic(buf, KM_IRQ0); |
| 3413 | local_irq_restore(flags); |
| 3414 | } else { |
| 3415 | buf = page_address(page); |
| 3416 | ata_data_xfer(ap, buf + offset, count, do_write); |
| 3417 | } |
Albert Lee | 7282aa4 | 2005-10-09 09:46:07 -0400 | [diff] [blame] | 3418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3419 | bytes -= count; |
| 3420 | qc->curbytes += count; |
| 3421 | qc->cursg_ofs += count; |
| 3422 | |
Albert Lee | 32529e0 | 2005-05-26 03:49:42 -0400 | [diff] [blame] | 3423 | if (qc->cursg_ofs == sg->length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | qc->cursg++; |
| 3425 | qc->cursg_ofs = 0; |
| 3426 | } |
| 3427 | |
Albert Lee | 563a6e1 | 2005-08-12 14:17:50 +0800 | [diff] [blame] | 3428 | if (bytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3429 | goto next_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3430 | } |
| 3431 | |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3432 | /** |
| 3433 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 3434 | * @qc: Command on going |
| 3435 | * |
| 3436 | * Transfer Transfer data from/to the ATAPI device. |
| 3437 | * |
| 3438 | * LOCKING: |
| 3439 | * Inherited from caller. |
Albert Lee | 6ae4cfb | 2005-08-12 14:15:34 +0800 | [diff] [blame] | 3440 | */ |
| 3441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3442 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 3443 | { |
| 3444 | struct ata_port *ap = qc->ap; |
| 3445 | struct ata_device *dev = qc->dev; |
| 3446 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 3447 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 3448 | |
| 3449 | ap->ops->tf_read(ap, &qc->tf); |
| 3450 | ireason = qc->tf.nsect; |
| 3451 | bc_lo = qc->tf.lbam; |
| 3452 | bc_hi = qc->tf.lbah; |
| 3453 | bytes = (bc_hi << 8) | bc_lo; |
| 3454 | |
| 3455 | /* shall be cleared to zero, indicating xfer of data */ |
| 3456 | if (ireason & (1 << 0)) |
| 3457 | goto err_out; |
| 3458 | |
| 3459 | /* make sure transfer direction matches expected */ |
| 3460 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 3461 | if (do_write != i_write) |
| 3462 | goto err_out; |
| 3463 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3464 | VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); |
| 3465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3466 | __atapi_pio_bytes(qc, bytes); |
| 3467 | |
| 3468 | return; |
| 3469 | |
| 3470 | err_out: |
| 3471 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", |
| 3472 | ap->id, dev->devno); |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3473 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3474 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3475 | } |
| 3476 | |
| 3477 | /** |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 3478 | * ata_pio_block - start PIO on a block |
| 3479 | * @ap: the target ata_port |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3480 | * |
| 3481 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3482 | * None. (executing in kernel thread context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3483 | */ |
| 3484 | |
| 3485 | static void ata_pio_block(struct ata_port *ap) |
| 3486 | { |
| 3487 | struct ata_queued_cmd *qc; |
| 3488 | u8 status; |
| 3489 | |
| 3490 | /* |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 3491 | * This is purely heuristic. This is a fast path. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3492 | * Sometimes when we enter, BSY will be cleared in |
| 3493 | * a chk-status or two. If not, the drive is probably seeking |
| 3494 | * or something. Snooze for a couple msecs, then |
| 3495 | * chk-status again. If still busy, fall back to |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3496 | * HSM_ST_POLL state. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3497 | */ |
| 3498 | status = ata_busy_wait(ap, ATA_BUSY, 5); |
| 3499 | if (status & ATA_BUSY) { |
| 3500 | msleep(2); |
| 3501 | status = ata_busy_wait(ap, ATA_BUSY, 10); |
| 3502 | if (status & ATA_BUSY) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3503 | ap->hsm_task_state = HSM_ST_POLL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3504 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
| 3505 | return; |
| 3506 | } |
| 3507 | } |
| 3508 | |
| 3509 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3510 | assert(qc != NULL); |
| 3511 | |
Albert Lee | fe79e68 | 2005-12-06 11:34:59 +0800 | [diff] [blame] | 3512 | /* check error */ |
| 3513 | if (status & (ATA_ERR | ATA_DF)) { |
| 3514 | qc->err_mask |= AC_ERR_DEV; |
| 3515 | ap->hsm_task_state = HSM_ST_ERR; |
| 3516 | return; |
| 3517 | } |
| 3518 | |
| 3519 | /* transfer data if any */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3520 | if (is_atapi_taskfile(&qc->tf)) { |
Albert Lee | fe79e68 | 2005-12-06 11:34:59 +0800 | [diff] [blame] | 3521 | /* DRQ=0 means no more data to transfer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3522 | if ((status & ATA_DRQ) == 0) { |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3523 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3524 | return; |
| 3525 | } |
| 3526 | |
| 3527 | atapi_pio_bytes(qc); |
| 3528 | } else { |
| 3529 | /* handle BSY=0, DRQ=0 as error */ |
| 3530 | if ((status & ATA_DRQ) == 0) { |
Tejun Heo | 11a56d2 | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3531 | qc->err_mask |= AC_ERR_HSM; |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3532 | ap->hsm_task_state = HSM_ST_ERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3533 | return; |
| 3534 | } |
| 3535 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 3536 | ata_pio_sectors(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3537 | } |
Albert Lee | 467b16d | 2005-11-01 19:19:01 +0800 | [diff] [blame] | 3538 | |
| 3539 | ata_altstatus(ap); /* flush */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3540 | } |
| 3541 | |
| 3542 | static void ata_pio_error(struct ata_port *ap) |
| 3543 | { |
| 3544 | struct ata_queued_cmd *qc; |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 3545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | qc = ata_qc_from_tag(ap, ap->active_tag); |
| 3547 | assert(qc != NULL); |
| 3548 | |
Albert Lee | 000080c | 2005-12-26 16:48:00 +0800 | [diff] [blame] | 3549 | if (qc->tf.command != ATA_CMD_PACKET) |
| 3550 | printk(KERN_WARNING "ata%u: PIO error\n", ap->id); |
| 3551 | |
Albert Lee | 1c84898 | 2005-12-05 15:40:15 +0800 | [diff] [blame] | 3552 | /* make sure qc->err_mask is available to |
| 3553 | * know what's wrong and recover |
| 3554 | */ |
| 3555 | assert(qc->err_mask); |
| 3556 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3557 | ap->hsm_task_state = HSM_ST_IDLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3558 | |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 3559 | ata_poll_qc_complete(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3560 | } |
| 3561 | |
| 3562 | static void ata_pio_task(void *_data) |
| 3563 | { |
| 3564 | struct ata_port *ap = _data; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3565 | unsigned long timeout; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3566 | int has_next; |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3567 | |
| 3568 | fsm_start: |
| 3569 | timeout = 0; |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3570 | has_next = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3571 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3572 | switch (ap->hsm_task_state) { |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3573 | case HSM_ST_FIRST: |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3574 | has_next = ata_pio_first_block(ap); |
| 3575 | break; |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3576 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3577 | case HSM_ST: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3578 | ata_pio_block(ap); |
| 3579 | break; |
| 3580 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3581 | case HSM_ST_LAST: |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3582 | has_next = ata_pio_complete(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | break; |
| 3584 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3585 | case HSM_ST_POLL: |
| 3586 | case HSM_ST_LAST_POLL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | timeout = ata_pio_poll(ap); |
| 3588 | break; |
| 3589 | |
Albert Lee | 14be71f | 2005-09-27 17:36:35 +0800 | [diff] [blame] | 3590 | case HSM_ST_TMOUT: |
| 3591 | case HSM_ST_ERR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3592 | ata_pio_error(ap); |
| 3593 | return; |
Albert Lee | 467b16d | 2005-11-01 19:19:01 +0800 | [diff] [blame] | 3594 | |
| 3595 | default: |
| 3596 | BUG(); |
| 3597 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3598 | } |
| 3599 | |
| 3600 | if (timeout) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3601 | queue_delayed_work(ata_wq, &ap->pio_task, timeout); |
Albert Lee | fbcdd80 | 2005-11-01 19:30:05 +0800 | [diff] [blame] | 3602 | else if (has_next) |
Jeff Garzik | 7fb6ec2 | 2005-09-16 06:01:48 -0400 | [diff] [blame] | 3603 | goto fsm_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3604 | } |
| 3605 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3606 | /** |
| 3607 | * ata_qc_timeout - Handle timeout of queued command |
| 3608 | * @qc: Command that timed out |
| 3609 | * |
| 3610 | * Some part of the kernel (currently, only the SCSI layer) |
| 3611 | * has noticed that the active command on port @ap has not |
| 3612 | * completed after a specified length of time. Handle this |
| 3613 | * condition by disabling DMA (if necessary) and completing |
| 3614 | * transactions, with error if necessary. |
| 3615 | * |
| 3616 | * This also handles the case of the "lost interrupt", where |
| 3617 | * for some reason (possibly hardware bug, possibly driver bug) |
| 3618 | * an interrupt was not delivered to the driver, even though the |
| 3619 | * transaction completed successfully. |
| 3620 | * |
| 3621 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3622 | * Inherited from SCSI layer (none, can sleep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | */ |
| 3624 | |
| 3625 | static void ata_qc_timeout(struct ata_queued_cmd *qc) |
| 3626 | { |
| 3627 | struct ata_port *ap = qc->ap; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3628 | struct ata_host_set *host_set = ap->host_set; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | u8 host_stat = 0, drv_stat; |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3630 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3631 | |
| 3632 | DPRINTK("ENTER\n"); |
| 3633 | |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3634 | spin_lock_irqsave(&host_set->lock, flags); |
| 3635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3636 | switch (qc->tf.protocol) { |
| 3637 | |
| 3638 | case ATA_PROT_DMA: |
| 3639 | case ATA_PROT_ATAPI_DMA: |
| 3640 | host_stat = ap->ops->bmdma_status(ap); |
| 3641 | |
| 3642 | /* before we do anything else, clear DMA-Start bit */ |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 3643 | ap->ops->bmdma_stop(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3644 | |
| 3645 | /* fall through */ |
| 3646 | |
| 3647 | default: |
| 3648 | ata_altstatus(ap); |
| 3649 | drv_stat = ata_chk_status(ap); |
| 3650 | |
| 3651 | /* ack bmdma irq events */ |
| 3652 | ap->ops->irq_clear(ap); |
| 3653 | |
| 3654 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", |
| 3655 | ap->id, qc->tf.command, drv_stat, host_stat); |
| 3656 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3657 | ap->hsm_task_state = HSM_ST_IDLE; |
| 3658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | /* complete taskfile transaction */ |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 3660 | qc->err_mask |= ac_err_mask(drv_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3661 | break; |
| 3662 | } |
Jeff Garzik | b8f6153 | 2005-08-25 22:01:20 -0400 | [diff] [blame] | 3663 | |
| 3664 | spin_unlock_irqrestore(&host_set->lock, flags); |
| 3665 | |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 3666 | ata_eh_qc_complete(qc); |
| 3667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3668 | DPRINTK("EXIT\n"); |
| 3669 | } |
| 3670 | |
| 3671 | /** |
| 3672 | * ata_eng_timeout - Handle timeout of queued command |
| 3673 | * @ap: Port on which timed-out command is active |
| 3674 | * |
| 3675 | * Some part of the kernel (currently, only the SCSI layer) |
| 3676 | * has noticed that the active command on port @ap has not |
| 3677 | * completed after a specified length of time. Handle this |
| 3678 | * condition by disabling DMA (if necessary) and completing |
| 3679 | * transactions, with error if necessary. |
| 3680 | * |
| 3681 | * This also handles the case of the "lost interrupt", where |
| 3682 | * for some reason (possibly hardware bug, possibly driver bug) |
| 3683 | * an interrupt was not delivered to the driver, even though the |
| 3684 | * transaction completed successfully. |
| 3685 | * |
| 3686 | * LOCKING: |
| 3687 | * Inherited from SCSI layer (none, can sleep) |
| 3688 | */ |
| 3689 | |
| 3690 | void ata_eng_timeout(struct ata_port *ap) |
| 3691 | { |
| 3692 | struct ata_queued_cmd *qc; |
| 3693 | |
| 3694 | DPRINTK("ENTER\n"); |
| 3695 | |
| 3696 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Jeff Garzik | e12669e | 2005-10-05 18:39:23 -0400 | [diff] [blame] | 3697 | if (qc) |
| 3698 | ata_qc_timeout(qc); |
| 3699 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | printk(KERN_ERR "ata%u: BUG: timeout without command\n", |
| 3701 | ap->id); |
| 3702 | goto out; |
| 3703 | } |
| 3704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3705 | out: |
| 3706 | DPRINTK("EXIT\n"); |
| 3707 | } |
| 3708 | |
| 3709 | /** |
| 3710 | * ata_qc_new - Request an available ATA command, for queueing |
| 3711 | * @ap: Port associated with device @dev |
| 3712 | * @dev: Device from whom we request an available command structure |
| 3713 | * |
| 3714 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3715 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3716 | */ |
| 3717 | |
| 3718 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| 3719 | { |
| 3720 | struct ata_queued_cmd *qc = NULL; |
| 3721 | unsigned int i; |
| 3722 | |
| 3723 | for (i = 0; i < ATA_MAX_QUEUE; i++) |
| 3724 | if (!test_and_set_bit(i, &ap->qactive)) { |
| 3725 | qc = ata_qc_from_tag(ap, i); |
| 3726 | break; |
| 3727 | } |
| 3728 | |
| 3729 | if (qc) |
| 3730 | qc->tag = i; |
| 3731 | |
| 3732 | return qc; |
| 3733 | } |
| 3734 | |
| 3735 | /** |
| 3736 | * ata_qc_new_init - Request an available ATA command, and initialize it |
| 3737 | * @ap: Port associated with device @dev |
| 3738 | * @dev: Device from whom we request an available command structure |
| 3739 | * |
| 3740 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3741 | * None. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | */ |
| 3743 | |
| 3744 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, |
| 3745 | struct ata_device *dev) |
| 3746 | { |
| 3747 | struct ata_queued_cmd *qc; |
| 3748 | |
| 3749 | qc = ata_qc_new(ap); |
| 3750 | if (qc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3751 | qc->scsicmd = NULL; |
| 3752 | qc->ap = ap; |
| 3753 | qc->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3754 | |
Jeff Garzik | 2c13b7c | 2005-11-14 14:14:16 -0500 | [diff] [blame] | 3755 | ata_qc_reinit(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3756 | } |
| 3757 | |
| 3758 | return qc; |
| 3759 | } |
| 3760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | /** |
| 3762 | * ata_qc_free - free unused ata_queued_cmd |
| 3763 | * @qc: Command to complete |
| 3764 | * |
| 3765 | * Designed to free unused ata_queued_cmd object |
| 3766 | * in case something prevents using it. |
| 3767 | * |
| 3768 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3769 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3770 | */ |
| 3771 | void ata_qc_free(struct ata_queued_cmd *qc) |
| 3772 | { |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3773 | struct ata_port *ap = qc->ap; |
| 3774 | unsigned int tag; |
| 3775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3776 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | |
Tejun Heo | 4ba946e | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3778 | qc->flags = 0; |
| 3779 | tag = qc->tag; |
| 3780 | if (likely(ata_tag_valid(tag))) { |
| 3781 | if (tag == ap->active_tag) |
| 3782 | ap->active_tag = ATA_TAG_POISON; |
| 3783 | qc->tag = ATA_TAG_POISON; |
| 3784 | clear_bit(tag, &ap->qactive); |
| 3785 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3786 | } |
| 3787 | |
| 3788 | /** |
| 3789 | * ata_qc_complete - Complete an active ATA command |
| 3790 | * @qc: Command to complete |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 3791 | * @err_mask: ATA Status register contents |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3792 | * |
| 3793 | * Indicate to the mid and upper layers that an ATA |
| 3794 | * command has completed, with either an ok or not-ok status. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3795 | * |
| 3796 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 3797 | * spin_lock_irqsave(host_set lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | */ |
| 3799 | |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 3800 | void ata_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3801 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3802 | assert(qc != NULL); /* ata_qc_from_tag _might_ return NULL */ |
| 3803 | assert(qc->flags & ATA_QCFLAG_ACTIVE); |
| 3804 | |
| 3805 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 3806 | ata_sg_clean(qc); |
| 3807 | |
Albert Lee | 3f3791d | 2005-08-16 14:25:38 +0800 | [diff] [blame] | 3808 | /* atapi: mark qc as inactive to prevent the interrupt handler |
| 3809 | * from completing the command twice later, before the error handler |
| 3810 | * is called. (when rc != 0 and atapi request sense is needed) |
| 3811 | */ |
| 3812 | qc->flags &= ~ATA_QCFLAG_ACTIVE; |
| 3813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3814 | /* call completion callback */ |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3815 | qc->complete_fn(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3816 | } |
| 3817 | |
| 3818 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
| 3819 | { |
| 3820 | struct ata_port *ap = qc->ap; |
| 3821 | |
| 3822 | switch (qc->tf.protocol) { |
| 3823 | case ATA_PROT_DMA: |
| 3824 | case ATA_PROT_ATAPI_DMA: |
| 3825 | return 1; |
| 3826 | |
| 3827 | case ATA_PROT_ATAPI: |
| 3828 | case ATA_PROT_PIO: |
| 3829 | case ATA_PROT_PIO_MULT: |
| 3830 | if (ap->flags & ATA_FLAG_PIO_DMA) |
| 3831 | return 1; |
| 3832 | |
| 3833 | /* fall through */ |
| 3834 | |
| 3835 | default: |
| 3836 | return 0; |
| 3837 | } |
| 3838 | |
| 3839 | /* never reached */ |
| 3840 | } |
| 3841 | |
| 3842 | /** |
| 3843 | * ata_qc_issue - issue taskfile to device |
| 3844 | * @qc: command to issue to device |
| 3845 | * |
| 3846 | * Prepare an ATA command to submission to device. |
| 3847 | * This includes mapping the data into a DMA-able |
| 3848 | * area, filling in the S/G table, and finally |
| 3849 | * writing the taskfile to hardware, starting the command. |
| 3850 | * |
| 3851 | * LOCKING: |
| 3852 | * spin_lock_irqsave(host_set lock) |
| 3853 | * |
| 3854 | * RETURNS: |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3855 | * Zero on success, AC_ERR_* mask on failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3856 | */ |
| 3857 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3858 | unsigned int ata_qc_issue(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | { |
| 3860 | struct ata_port *ap = qc->ap; |
| 3861 | |
| 3862 | if (ata_should_dma_map(qc)) { |
| 3863 | if (qc->flags & ATA_QCFLAG_SG) { |
| 3864 | if (ata_sg_setup(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3865 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3866 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
| 3867 | if (ata_sg_setup_one(qc)) |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3868 | goto sg_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | } |
| 3870 | } else { |
| 3871 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| 3872 | } |
| 3873 | |
| 3874 | ap->ops->qc_prep(qc); |
| 3875 | |
| 3876 | qc->ap->active_tag = qc->tag; |
| 3877 | qc->flags |= ATA_QCFLAG_ACTIVE; |
| 3878 | |
| 3879 | return ap->ops->qc_issue(qc); |
| 3880 | |
Tejun Heo | 8e436af | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3881 | sg_err: |
| 3882 | qc->flags &= ~ATA_QCFLAG_DMAMAP; |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3883 | return AC_ERR_SYSTEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3884 | } |
| 3885 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | /** |
| 3888 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner |
| 3889 | * @qc: command to issue to device |
| 3890 | * |
| 3891 | * Using various libata functions and hooks, this function |
| 3892 | * starts an ATA command. ATA commands are grouped into |
| 3893 | * classes called "protocols", and issuing each type of protocol |
| 3894 | * is slightly different. |
| 3895 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 3896 | * May be used as the qc_issue() entry in ata_port_operations. |
| 3897 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3898 | * LOCKING: |
| 3899 | * spin_lock_irqsave(host_set lock) |
| 3900 | * |
| 3901 | * RETURNS: |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3902 | * Zero on success, AC_ERR_* mask on failure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3903 | */ |
| 3904 | |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 3905 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3906 | { |
| 3907 | struct ata_port *ap = qc->ap; |
| 3908 | |
Albert Lee | e50362e | 2005-09-27 17:39:50 +0800 | [diff] [blame] | 3909 | /* Use polling pio if the LLD doesn't handle |
| 3910 | * interrupt driven pio and atapi CDB interrupt. |
| 3911 | */ |
| 3912 | if (ap->flags & ATA_FLAG_PIO_POLLING) { |
| 3913 | switch (qc->tf.protocol) { |
| 3914 | case ATA_PROT_PIO: |
| 3915 | case ATA_PROT_ATAPI: |
| 3916 | case ATA_PROT_ATAPI_NODATA: |
| 3917 | qc->tf.flags |= ATA_TFLAG_POLLING; |
| 3918 | break; |
| 3919 | case ATA_PROT_ATAPI_DMA: |
| 3920 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
| 3921 | BUG(); |
| 3922 | break; |
| 3923 | default: |
| 3924 | break; |
| 3925 | } |
| 3926 | } |
| 3927 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3928 | /* select the device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3929 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 3930 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3931 | /* start the command */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3932 | switch (qc->tf.protocol) { |
| 3933 | case ATA_PROT_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3934 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 3935 | ata_qc_set_polling(qc); |
| 3936 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 3937 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3938 | ap->hsm_task_state = HSM_ST_LAST; |
| 3939 | |
| 3940 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 3941 | queue_work(ata_wq, &ap->pio_task); |
| 3942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | break; |
| 3944 | |
| 3945 | case ATA_PROT_DMA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3946 | assert(!(qc->tf.flags & ATA_TFLAG_POLLING)); |
| 3947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 3949 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 3950 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3951 | ap->hsm_task_state = HSM_ST_LAST; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3952 | break; |
| 3953 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3954 | case ATA_PROT_PIO: |
| 3955 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 3956 | ata_qc_set_polling(qc); |
| 3957 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 3958 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3959 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3960 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 3961 | /* PIO data out protocol */ |
| 3962 | ap->hsm_task_state = HSM_ST_FIRST; |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3963 | queue_work(ata_wq, &ap->pio_task); |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3964 | |
| 3965 | /* always send first data block using |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3966 | * the ata_pio_task() codepath. |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3967 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3968 | } else { |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3969 | /* PIO data in protocol */ |
| 3970 | ap->hsm_task_state = HSM_ST; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3971 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3972 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 3973 | queue_work(ata_wq, &ap->pio_task); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3974 | |
Albert Lee | 54f0038 | 2005-09-30 19:14:19 +0800 | [diff] [blame] | 3975 | /* if polling, ata_pio_task() handles the rest. |
| 3976 | * otherwise, interrupt handler takes over from here. |
| 3977 | */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3978 | } |
| 3979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3980 | break; |
| 3981 | |
| 3982 | case ATA_PROT_ATAPI: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3983 | case ATA_PROT_ATAPI_NODATA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3984 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 3985 | ata_qc_set_polling(qc); |
| 3986 | |
Jeff Garzik | e533825 | 2005-10-30 21:37:17 -0500 | [diff] [blame] | 3987 | ata_tf_to_host(ap, &qc->tf); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3988 | ap->hsm_task_state = HSM_ST_FIRST; |
| 3989 | |
| 3990 | /* send cdb by polling if no cdb interrupt */ |
| 3991 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 3992 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 3993 | queue_work(ata_wq, &ap->pio_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3994 | break; |
| 3995 | |
| 3996 | case ATA_PROT_ATAPI_DMA: |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 3997 | assert(!(qc->tf.flags & ATA_TFLAG_POLLING)); |
| 3998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3999 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
| 4000 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4001 | ap->hsm_task_state = HSM_ST_FIRST; |
| 4002 | |
| 4003 | /* send cdb by polling if no cdb interrupt */ |
| 4004 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Albert Lee | e27486d | 2005-11-01 19:24:49 +0800 | [diff] [blame] | 4005 | queue_work(ata_wq, &ap->pio_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4006 | break; |
| 4007 | |
| 4008 | default: |
| 4009 | WARN_ON(1); |
Tejun Heo | 9a3d9eb | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 4010 | return AC_ERR_SYSTEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4011 | } |
| 4012 | |
| 4013 | return 0; |
| 4014 | } |
| 4015 | |
| 4016 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4017 | * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4018 | * @qc: Info associated with this ATA transaction. |
| 4019 | * |
| 4020 | * LOCKING: |
| 4021 | * spin_lock_irqsave(host_set lock) |
| 4022 | */ |
| 4023 | |
| 4024 | static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc) |
| 4025 | { |
| 4026 | struct ata_port *ap = qc->ap; |
| 4027 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 4028 | u8 dmactl; |
| 4029 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 4030 | |
| 4031 | /* load PRD table addr. */ |
| 4032 | mb(); /* make sure PRD table writes are visible to controller */ |
| 4033 | writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS); |
| 4034 | |
| 4035 | /* specify data direction, triple-check start bit is clear */ |
| 4036 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 4037 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 4038 | if (!rw) |
| 4039 | dmactl |= ATA_DMA_WR; |
| 4040 | writeb(dmactl, mmio + ATA_DMA_CMD); |
| 4041 | |
| 4042 | /* issue r/w command */ |
| 4043 | ap->ops->exec_command(ap, &qc->tf); |
| 4044 | } |
| 4045 | |
| 4046 | /** |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 4047 | * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4048 | * @qc: Info associated with this ATA transaction. |
| 4049 | * |
| 4050 | * LOCKING: |
| 4051 | * spin_lock_irqsave(host_set lock) |
| 4052 | */ |
| 4053 | |
| 4054 | static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc) |
| 4055 | { |
| 4056 | struct ata_port *ap = qc->ap; |
| 4057 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 4058 | u8 dmactl; |
| 4059 | |
| 4060 | /* start host DMA transaction */ |
| 4061 | dmactl = readb(mmio + ATA_DMA_CMD); |
| 4062 | writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD); |
| 4063 | |
| 4064 | /* Strictly, one may wish to issue a readb() here, to |
| 4065 | * flush the mmio write. However, control also passes |
| 4066 | * to the hardware at this point, and it will interrupt |
| 4067 | * us when we are to resume control. So, in effect, |
| 4068 | * we don't care when the mmio write flushes. |
| 4069 | * Further, a read of the DMA status register _immediately_ |
| 4070 | * following the write may not be what certain flaky hardware |
| 4071 | * is expected, so I think it is best to not add a readb() |
| 4072 | * without first all the MMIO ATA cards/mobos. |
| 4073 | * Or maybe I'm just being paranoid. |
| 4074 | */ |
| 4075 | } |
| 4076 | |
| 4077 | /** |
| 4078 | * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO) |
| 4079 | * @qc: Info associated with this ATA transaction. |
| 4080 | * |
| 4081 | * LOCKING: |
| 4082 | * spin_lock_irqsave(host_set lock) |
| 4083 | */ |
| 4084 | |
| 4085 | static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc) |
| 4086 | { |
| 4087 | struct ata_port *ap = qc->ap; |
| 4088 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 4089 | u8 dmactl; |
| 4090 | |
| 4091 | /* load PRD table addr. */ |
| 4092 | outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); |
| 4093 | |
| 4094 | /* specify data direction, triple-check start bit is clear */ |
| 4095 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 4096 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 4097 | if (!rw) |
| 4098 | dmactl |= ATA_DMA_WR; |
| 4099 | outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 4100 | |
| 4101 | /* issue r/w command */ |
| 4102 | ap->ops->exec_command(ap, &qc->tf); |
| 4103 | } |
| 4104 | |
| 4105 | /** |
| 4106 | * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO) |
| 4107 | * @qc: Info associated with this ATA transaction. |
| 4108 | * |
| 4109 | * LOCKING: |
| 4110 | * spin_lock_irqsave(host_set lock) |
| 4111 | */ |
| 4112 | |
| 4113 | static void ata_bmdma_start_pio (struct ata_queued_cmd *qc) |
| 4114 | { |
| 4115 | struct ata_port *ap = qc->ap; |
| 4116 | u8 dmactl; |
| 4117 | |
| 4118 | /* start host DMA transaction */ |
| 4119 | dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 4120 | outb(dmactl | ATA_DMA_START, |
| 4121 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 4122 | } |
| 4123 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4124 | |
| 4125 | /** |
| 4126 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction |
| 4127 | * @qc: Info associated with this ATA transaction. |
| 4128 | * |
| 4129 | * Writes the ATA_DMA_START flag to the DMA command register. |
| 4130 | * |
| 4131 | * May be used as the bmdma_start() entry in ata_port_operations. |
| 4132 | * |
| 4133 | * LOCKING: |
| 4134 | * spin_lock_irqsave(host_set lock) |
| 4135 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4136 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
| 4137 | { |
| 4138 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 4139 | ata_bmdma_start_mmio(qc); |
| 4140 | else |
| 4141 | ata_bmdma_start_pio(qc); |
| 4142 | } |
| 4143 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4144 | |
| 4145 | /** |
| 4146 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction |
| 4147 | * @qc: Info associated with this ATA transaction. |
| 4148 | * |
| 4149 | * Writes address of PRD table to device's PRD Table Address |
| 4150 | * register, sets the DMA control register, and calls |
| 4151 | * ops->exec_command() to start the transfer. |
| 4152 | * |
| 4153 | * May be used as the bmdma_setup() entry in ata_port_operations. |
| 4154 | * |
| 4155 | * LOCKING: |
| 4156 | * spin_lock_irqsave(host_set lock) |
| 4157 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
| 4159 | { |
| 4160 | if (qc->ap->flags & ATA_FLAG_MMIO) |
| 4161 | ata_bmdma_setup_mmio(qc); |
| 4162 | else |
| 4163 | ata_bmdma_setup_pio(qc); |
| 4164 | } |
| 4165 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4166 | |
| 4167 | /** |
| 4168 | * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. |
Jeff Garzik | decc6d0 | 2005-06-02 18:42:33 -0400 | [diff] [blame] | 4169 | * @ap: Port associated with this ATA transaction. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4170 | * |
| 4171 | * Clear interrupt and error flags in DMA status register. |
| 4172 | * |
| 4173 | * May be used as the irq_clear() entry in ata_port_operations. |
| 4174 | * |
| 4175 | * LOCKING: |
| 4176 | * spin_lock_irqsave(host_set lock) |
| 4177 | */ |
| 4178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | void ata_bmdma_irq_clear(struct ata_port *ap) |
| 4180 | { |
| 4181 | if (ap->flags & ATA_FLAG_MMIO) { |
| 4182 | void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS; |
| 4183 | writeb(readb(mmio), mmio); |
| 4184 | } else { |
| 4185 | unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS; |
| 4186 | outb(inb(addr), addr); |
| 4187 | } |
| 4188 | |
| 4189 | } |
| 4190 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4191 | |
| 4192 | /** |
| 4193 | * ata_bmdma_status - Read PCI IDE BMDMA status |
Jeff Garzik | decc6d0 | 2005-06-02 18:42:33 -0400 | [diff] [blame] | 4194 | * @ap: Port associated with this ATA transaction. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4195 | * |
| 4196 | * Read and return BMDMA status register. |
| 4197 | * |
| 4198 | * May be used as the bmdma_status() entry in ata_port_operations. |
| 4199 | * |
| 4200 | * LOCKING: |
| 4201 | * spin_lock_irqsave(host_set lock) |
| 4202 | */ |
| 4203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4204 | u8 ata_bmdma_status(struct ata_port *ap) |
| 4205 | { |
| 4206 | u8 host_stat; |
| 4207 | if (ap->flags & ATA_FLAG_MMIO) { |
| 4208 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 4209 | host_stat = readb(mmio + ATA_DMA_STATUS); |
| 4210 | } else |
Albert Lee | ee500aa | 2005-09-27 17:34:38 +0800 | [diff] [blame] | 4211 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4212 | return host_stat; |
| 4213 | } |
| 4214 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4215 | |
| 4216 | /** |
| 4217 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 4218 | * @qc: Command we are ending DMA for |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4219 | * |
| 4220 | * Clears the ATA_DMA_START flag in the dma control register |
| 4221 | * |
| 4222 | * May be used as the bmdma_stop() entry in ata_port_operations. |
| 4223 | * |
| 4224 | * LOCKING: |
| 4225 | * spin_lock_irqsave(host_set lock) |
| 4226 | */ |
| 4227 | |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 4228 | void ata_bmdma_stop(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4229 | { |
Alan Cox | b73fc89 | 2005-08-26 16:03:19 +0100 | [diff] [blame] | 4230 | struct ata_port *ap = qc->ap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4231 | if (ap->flags & ATA_FLAG_MMIO) { |
| 4232 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; |
| 4233 | |
| 4234 | /* clear start/stop bit */ |
| 4235 | writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 4236 | mmio + ATA_DMA_CMD); |
| 4237 | } else { |
| 4238 | /* clear start/stop bit */ |
| 4239 | outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 4240 | ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 4241 | } |
| 4242 | |
| 4243 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ |
| 4244 | ata_altstatus(ap); /* dummy read */ |
| 4245 | } |
| 4246 | |
| 4247 | /** |
| 4248 | * ata_host_intr - Handle host interrupt for given (port, task) |
| 4249 | * @ap: Port on which interrupt arrived (possibly...) |
| 4250 | * @qc: Taskfile currently active in engine |
| 4251 | * |
| 4252 | * Handle host interrupt for given queued command. Currently, |
| 4253 | * only DMA interrupts are handled. All other commands are |
| 4254 | * handled via polling with interrupts disabled (nIEN bit). |
| 4255 | * |
| 4256 | * LOCKING: |
| 4257 | * spin_lock_irqsave(host_set lock) |
| 4258 | * |
| 4259 | * RETURNS: |
| 4260 | * One if interrupt was handled, zero if not (shared irq). |
| 4261 | */ |
| 4262 | |
| 4263 | inline unsigned int ata_host_intr (struct ata_port *ap, |
| 4264 | struct ata_queued_cmd *qc) |
| 4265 | { |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4266 | u8 status, host_stat = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4267 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4268 | VPRINTK("ata%u: protocol %d task_state %d\n", |
| 4269 | ap->id, qc->tf.protocol, ap->hsm_task_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4271 | /* Check whether we are expecting interrupt in this state */ |
| 4272 | switch (ap->hsm_task_state) { |
| 4273 | case HSM_ST_FIRST: |
| 4274 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 4275 | * The flag was turned on only for atapi devices. |
| 4276 | * No need to check is_atapi_taskfile(&qc->tf) again. |
| 4277 | */ |
| 4278 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4279 | goto idle_irq; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4280 | break; |
| 4281 | case HSM_ST_LAST: |
| 4282 | if (qc->tf.protocol == ATA_PROT_DMA || |
| 4283 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { |
| 4284 | /* check status of DMA engine */ |
| 4285 | host_stat = ap->ops->bmdma_status(ap); |
| 4286 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4288 | /* if it's not our irq... */ |
| 4289 | if (!(host_stat & ATA_DMA_INTR)) |
| 4290 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4291 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4292 | /* before we do anything else, clear DMA-Start bit */ |
| 4293 | ap->ops->bmdma_stop(qc); |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4294 | |
| 4295 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 4296 | /* error when transfering data to/from memory */ |
| 4297 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 4298 | ap->hsm_task_state = HSM_ST_ERR; |
| 4299 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4300 | } |
| 4301 | break; |
| 4302 | case HSM_ST: |
| 4303 | break; |
| 4304 | default: |
| 4305 | goto idle_irq; |
| 4306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4307 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4308 | /* check altstatus */ |
| 4309 | status = ata_altstatus(ap); |
| 4310 | if (status & ATA_BUSY) |
| 4311 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4312 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4313 | /* check main status, clearing INTRQ */ |
| 4314 | status = ata_chk_status(ap); |
| 4315 | if (unlikely(status & ATA_BUSY)) |
| 4316 | goto idle_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4317 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4318 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
| 4319 | ap->id, qc->tf.protocol, ap->hsm_task_state, status); |
| 4320 | |
| 4321 | /* ack bmdma irq events */ |
| 4322 | ap->ops->irq_clear(ap); |
| 4323 | |
| 4324 | /* check error */ |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4325 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
| 4326 | qc->err_mask |= AC_ERR_DEV; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4327 | ap->hsm_task_state = HSM_ST_ERR; |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4328 | } |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4329 | |
| 4330 | fsm_start: |
| 4331 | switch (ap->hsm_task_state) { |
| 4332 | case HSM_ST_FIRST: |
| 4333 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 4334 | * at this state when ready to receive CDB. |
| 4335 | */ |
| 4336 | |
| 4337 | /* check device status */ |
| 4338 | if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) { |
| 4339 | /* Wrong status. Let EH handle this */ |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4340 | qc->err_mask |= AC_ERR_ATA_BUS; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4341 | ap->hsm_task_state = HSM_ST_ERR; |
| 4342 | goto fsm_start; |
| 4343 | } |
| 4344 | |
| 4345 | atapi_send_cdb(ap, qc); |
| 4346 | |
| 4347 | break; |
| 4348 | |
| 4349 | case HSM_ST: |
| 4350 | /* complete command or read/write the data register */ |
| 4351 | if (qc->tf.protocol == ATA_PROT_ATAPI) { |
| 4352 | /* ATAPI PIO protocol */ |
| 4353 | if ((status & ATA_DRQ) == 0) { |
| 4354 | /* no more data to transfer */ |
| 4355 | ap->hsm_task_state = HSM_ST_LAST; |
| 4356 | goto fsm_start; |
| 4357 | } |
| 4358 | |
| 4359 | atapi_pio_bytes(qc); |
| 4360 | |
| 4361 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 4362 | /* bad ireason reported by device */ |
| 4363 | goto fsm_start; |
| 4364 | |
| 4365 | } else { |
| 4366 | /* ATA PIO protocol */ |
| 4367 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 4368 | /* handle BSY=0, DRQ=0 as error */ |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4369 | qc->err_mask |= AC_ERR_ATA_BUS; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4370 | ap->hsm_task_state = HSM_ST_ERR; |
| 4371 | goto fsm_start; |
| 4372 | } |
| 4373 | |
Albert Lee | 07f6f7d | 2005-11-01 19:33:20 +0800 | [diff] [blame] | 4374 | ata_pio_sectors(qc); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4375 | |
| 4376 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 4377 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 4378 | /* all data read */ |
| 4379 | ata_altstatus(ap); |
| 4380 | status = ata_chk_status(ap); |
| 4381 | goto fsm_start; |
| 4382 | } |
| 4383 | } |
| 4384 | |
| 4385 | ata_altstatus(ap); /* flush */ |
| 4386 | break; |
| 4387 | |
| 4388 | case HSM_ST_LAST: |
| 4389 | if (unlikely(status & ATA_DRQ)) { |
| 4390 | /* handle DRQ=1 as error */ |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4391 | qc->err_mask |= AC_ERR_ATA_BUS; |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4392 | ap->hsm_task_state = HSM_ST_ERR; |
| 4393 | goto fsm_start; |
| 4394 | } |
| 4395 | |
| 4396 | /* no more data to transfer */ |
| 4397 | DPRINTK("ata%u: command complete, drv_stat 0x%x\n", |
| 4398 | ap->id, status); |
| 4399 | |
| 4400 | ap->hsm_task_state = HSM_ST_IDLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4401 | |
| 4402 | /* complete taskfile transaction */ |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 4403 | qc->err_mask |= ac_err_mask(status); |
| 4404 | ata_qc_complete(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4405 | break; |
| 4406 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4407 | case HSM_ST_ERR: |
Albert Lee | 000080c | 2005-12-26 16:48:00 +0800 | [diff] [blame] | 4408 | if (qc->tf.command != ATA_CMD_PACKET) |
| 4409 | printk(KERN_ERR "ata%u: command error, drv_stat 0x%x host_stat 0x%x\n", |
| 4410 | ap->id, status, host_stat); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4411 | |
Albert Lee | a4f1661 | 2005-12-26 16:40:53 +0800 | [diff] [blame] | 4412 | /* make sure qc->err_mask is available to |
| 4413 | * know what's wrong and recover |
| 4414 | */ |
| 4415 | assert(qc->err_mask); |
| 4416 | |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4417 | ap->hsm_task_state = HSM_ST_IDLE; |
Jeff Garzik | 278efe9 | 2005-12-06 05:01:27 -0500 | [diff] [blame] | 4418 | ata_qc_complete(qc); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4419 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4420 | default: |
| 4421 | goto idle_irq; |
| 4422 | } |
| 4423 | |
| 4424 | return 1; /* irq handled */ |
| 4425 | |
| 4426 | idle_irq: |
| 4427 | ap->stats.idle_irq++; |
| 4428 | |
| 4429 | #ifdef ATA_IRQ_TRAP |
| 4430 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 4431 | handled = 1; |
| 4432 | ata_irq_ack(ap, 0); /* debug trap */ |
| 4433 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); |
| 4434 | } |
| 4435 | #endif |
| 4436 | return 0; /* irq not handled */ |
| 4437 | } |
| 4438 | |
| 4439 | /** |
| 4440 | * ata_interrupt - Default ATA host interrupt handler |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4441 | * @irq: irq line (unused) |
| 4442 | * @dev_instance: pointer to our ata_host_set information structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4443 | * @regs: unused |
| 4444 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4445 | * Default interrupt handler for PCI IDE devices. Calls |
| 4446 | * ata_host_intr() for each port that is not disabled. |
| 4447 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4448 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4449 | * Obtains host_set lock during operation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4450 | * |
| 4451 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4452 | * IRQ_NONE or IRQ_HANDLED. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4453 | */ |
| 4454 | |
| 4455 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) |
| 4456 | { |
| 4457 | struct ata_host_set *host_set = dev_instance; |
| 4458 | unsigned int i; |
| 4459 | unsigned int handled = 0; |
| 4460 | unsigned long flags; |
| 4461 | |
| 4462 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 4463 | spin_lock_irqsave(&host_set->lock, flags); |
| 4464 | |
| 4465 | for (i = 0; i < host_set->n_ports; i++) { |
| 4466 | struct ata_port *ap; |
| 4467 | |
| 4468 | ap = host_set->ports[i]; |
Tejun Heo | c138950 | 2005-08-22 14:59:24 +0900 | [diff] [blame] | 4469 | if (ap && |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4470 | !(ap->flags & ATA_FLAG_PORT_DISABLED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4471 | struct ata_queued_cmd *qc; |
| 4472 | |
| 4473 | qc = ata_qc_from_tag(ap, ap->active_tag); |
Albert Lee | 312f7da | 2005-09-27 17:38:03 +0800 | [diff] [blame] | 4474 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
Albert Lee | 21b1ed7 | 2005-04-29 17:34:59 +0800 | [diff] [blame] | 4475 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4476 | handled |= ata_host_intr(ap, qc); |
| 4477 | } |
| 4478 | } |
| 4479 | |
| 4480 | spin_unlock_irqrestore(&host_set->lock, flags); |
| 4481 | |
| 4482 | return IRQ_RETVAL(handled); |
| 4483 | } |
| 4484 | |
| 4485 | /** |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4486 | * ata_port_start - Set port up for dma. |
| 4487 | * @ap: Port to initialize |
| 4488 | * |
| 4489 | * Called just after data structures for each port are |
| 4490 | * initialized. Allocates space for PRD table. |
| 4491 | * |
| 4492 | * May be used as the port_start() entry in ata_port_operations. |
| 4493 | * |
| 4494 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4495 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4496 | */ |
| 4497 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 4498 | /* |
| 4499 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, |
| 4500 | * without filling any other registers |
| 4501 | */ |
| 4502 | static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, |
| 4503 | u8 cmd) |
| 4504 | { |
| 4505 | struct ata_taskfile tf; |
| 4506 | int err; |
| 4507 | |
| 4508 | ata_tf_init(ap, &tf, dev->devno); |
| 4509 | |
| 4510 | tf.command = cmd; |
| 4511 | tf.flags |= ATA_TFLAG_DEVICE; |
| 4512 | tf.protocol = ATA_PROT_NODATA; |
| 4513 | |
| 4514 | err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
| 4515 | if (err) |
| 4516 | printk(KERN_ERR "%s: ata command failed: %d\n", |
| 4517 | __FUNCTION__, err); |
| 4518 | |
| 4519 | return err; |
| 4520 | } |
| 4521 | |
| 4522 | static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) |
| 4523 | { |
| 4524 | u8 cmd; |
| 4525 | |
| 4526 | if (!ata_try_flush_cache(dev)) |
| 4527 | return 0; |
| 4528 | |
| 4529 | if (ata_id_has_flush_ext(dev->id)) |
| 4530 | cmd = ATA_CMD_FLUSH_EXT; |
| 4531 | else |
| 4532 | cmd = ATA_CMD_FLUSH; |
| 4533 | |
| 4534 | return ata_do_simple_cmd(ap, dev, cmd); |
| 4535 | } |
| 4536 | |
| 4537 | static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) |
| 4538 | { |
| 4539 | return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); |
| 4540 | } |
| 4541 | |
| 4542 | static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) |
| 4543 | { |
| 4544 | return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); |
| 4545 | } |
| 4546 | |
| 4547 | /** |
| 4548 | * ata_device_resume - wakeup a previously suspended devices |
| 4549 | * |
| 4550 | * Kick the drive back into action, by sending it an idle immediate |
| 4551 | * command and making sure its transfer mode matches between drive |
| 4552 | * and host. |
| 4553 | * |
| 4554 | */ |
| 4555 | int ata_device_resume(struct ata_port *ap, struct ata_device *dev) |
| 4556 | { |
| 4557 | if (ap->flags & ATA_FLAG_SUSPENDED) { |
| 4558 | ap->flags &= ~ATA_FLAG_SUSPENDED; |
| 4559 | ata_set_mode(ap); |
| 4560 | } |
| 4561 | if (!ata_dev_present(dev)) |
| 4562 | return 0; |
| 4563 | if (dev->class == ATA_DEV_ATA) |
| 4564 | ata_start_drive(ap, dev); |
| 4565 | |
| 4566 | return 0; |
| 4567 | } |
| 4568 | |
| 4569 | /** |
| 4570 | * ata_device_suspend - prepare a device for suspend |
| 4571 | * |
| 4572 | * Flush the cache on the drive, if appropriate, then issue a |
| 4573 | * standbynow command. |
| 4574 | * |
| 4575 | */ |
| 4576 | int ata_device_suspend(struct ata_port *ap, struct ata_device *dev) |
| 4577 | { |
| 4578 | if (!ata_dev_present(dev)) |
| 4579 | return 0; |
| 4580 | if (dev->class == ATA_DEV_ATA) |
| 4581 | ata_flush_cache(ap, dev); |
| 4582 | |
| 4583 | ata_standby_drive(ap, dev); |
| 4584 | ap->flags |= ATA_FLAG_SUSPENDED; |
| 4585 | return 0; |
| 4586 | } |
| 4587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4588 | int ata_port_start (struct ata_port *ap) |
| 4589 | { |
| 4590 | struct device *dev = ap->host_set->dev; |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 4591 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4592 | |
| 4593 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); |
| 4594 | if (!ap->prd) |
| 4595 | return -ENOMEM; |
| 4596 | |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 4597 | rc = ata_pad_alloc(ap, dev); |
| 4598 | if (rc) { |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4599 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 4600 | return rc; |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 4601 | } |
| 4602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4603 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
| 4604 | |
| 4605 | return 0; |
| 4606 | } |
| 4607 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4608 | |
| 4609 | /** |
| 4610 | * ata_port_stop - Undo ata_port_start() |
| 4611 | * @ap: Port to shut down |
| 4612 | * |
| 4613 | * Frees the PRD table. |
| 4614 | * |
| 4615 | * May be used as the port_stop() entry in ata_port_operations. |
| 4616 | * |
| 4617 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4618 | * Inherited from caller. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4619 | */ |
| 4620 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4621 | void ata_port_stop (struct ata_port *ap) |
| 4622 | { |
| 4623 | struct device *dev = ap->host_set->dev; |
| 4624 | |
| 4625 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
Jeff Garzik | 6037d6b | 2005-11-04 22:08:00 -0500 | [diff] [blame] | 4626 | ata_pad_free(ap, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4627 | } |
| 4628 | |
Jeff Garzik | aa8f0dc | 2005-05-26 21:54:27 -0400 | [diff] [blame] | 4629 | void ata_host_stop (struct ata_host_set *host_set) |
| 4630 | { |
| 4631 | if (host_set->mmio_base) |
| 4632 | iounmap(host_set->mmio_base); |
| 4633 | } |
| 4634 | |
| 4635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4636 | /** |
| 4637 | * ata_host_remove - Unregister SCSI host structure with upper layers |
| 4638 | * @ap: Port to unregister |
| 4639 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port |
| 4640 | * |
| 4641 | * LOCKING: |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 4642 | * Inherited from caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4643 | */ |
| 4644 | |
| 4645 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) |
| 4646 | { |
| 4647 | struct Scsi_Host *sh = ap->host; |
| 4648 | |
| 4649 | DPRINTK("ENTER\n"); |
| 4650 | |
| 4651 | if (do_unregister) |
| 4652 | scsi_remove_host(sh); |
| 4653 | |
| 4654 | ap->ops->port_stop(ap); |
| 4655 | } |
| 4656 | |
| 4657 | /** |
| 4658 | * ata_host_init - Initialize an ata_port structure |
| 4659 | * @ap: Structure to initialize |
| 4660 | * @host: associated SCSI mid-layer structure |
| 4661 | * @host_set: Collection of hosts to which @ap belongs |
| 4662 | * @ent: Probe information provided by low-level driver |
| 4663 | * @port_no: Port number associated with this ata_port |
| 4664 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4665 | * Initialize a new ata_port structure, and its associated |
| 4666 | * scsi_host. |
| 4667 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4668 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4669 | * Inherited from caller. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4670 | */ |
| 4671 | |
| 4672 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, |
| 4673 | struct ata_host_set *host_set, |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 4674 | const struct ata_probe_ent *ent, unsigned int port_no) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4675 | { |
| 4676 | unsigned int i; |
| 4677 | |
| 4678 | host->max_id = 16; |
| 4679 | host->max_lun = 1; |
| 4680 | host->max_channel = 1; |
| 4681 | host->unique_id = ata_unique_id++; |
| 4682 | host->max_cmd_len = 12; |
Christoph Hellwig | 1241319 | 2005-06-11 01:05:01 +0200 | [diff] [blame] | 4683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4684 | ap->flags = ATA_FLAG_PORT_DISABLED; |
| 4685 | ap->id = host->unique_id; |
| 4686 | ap->host = host; |
| 4687 | ap->ctl = ATA_DEVCTL_OBS; |
| 4688 | ap->host_set = host_set; |
| 4689 | ap->port_no = port_no; |
| 4690 | ap->hard_port_no = |
| 4691 | ent->legacy_mode ? ent->hard_port_no : port_no; |
| 4692 | ap->pio_mask = ent->pio_mask; |
| 4693 | ap->mwdma_mask = ent->mwdma_mask; |
| 4694 | ap->udma_mask = ent->udma_mask; |
| 4695 | ap->flags |= ent->host_flags; |
| 4696 | ap->ops = ent->port_ops; |
| 4697 | ap->cbl = ATA_CBL_NONE; |
| 4698 | ap->active_tag = ATA_TAG_POISON; |
| 4699 | ap->last_ctl = 0xFF; |
| 4700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4701 | INIT_WORK(&ap->pio_task, ata_pio_task, ap); |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 4702 | INIT_LIST_HEAD(&ap->eh_done_q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4703 | |
| 4704 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
| 4705 | ap->device[i].devno = i; |
| 4706 | |
| 4707 | #ifdef ATA_IRQ_TRAP |
| 4708 | ap->stats.unhandled_irq = 1; |
| 4709 | ap->stats.idle_irq = 1; |
| 4710 | #endif |
| 4711 | |
| 4712 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); |
| 4713 | } |
| 4714 | |
| 4715 | /** |
| 4716 | * ata_host_add - Attach low-level ATA driver to system |
| 4717 | * @ent: Information provided by low-level driver |
| 4718 | * @host_set: Collections of ports to which we add |
| 4719 | * @port_no: Port number associated with this host |
| 4720 | * |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4721 | * Attach low-level ATA driver to system. |
| 4722 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4723 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4724 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4725 | * |
| 4726 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4727 | * New ata_port on success, for NULL on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4728 | */ |
| 4729 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 4730 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4731 | struct ata_host_set *host_set, |
| 4732 | unsigned int port_no) |
| 4733 | { |
| 4734 | struct Scsi_Host *host; |
| 4735 | struct ata_port *ap; |
| 4736 | int rc; |
| 4737 | |
| 4738 | DPRINTK("ENTER\n"); |
| 4739 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
| 4740 | if (!host) |
| 4741 | return NULL; |
| 4742 | |
| 4743 | ap = (struct ata_port *) &host->hostdata[0]; |
| 4744 | |
| 4745 | ata_host_init(ap, host, host_set, ent, port_no); |
| 4746 | |
| 4747 | rc = ap->ops->port_start(ap); |
| 4748 | if (rc) |
| 4749 | goto err_out; |
| 4750 | |
| 4751 | return ap; |
| 4752 | |
| 4753 | err_out: |
| 4754 | scsi_host_put(host); |
| 4755 | return NULL; |
| 4756 | } |
| 4757 | |
| 4758 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4759 | * ata_device_add - Register hardware device with ATA and SCSI layers |
| 4760 | * @ent: Probe information describing hardware device to be registered |
| 4761 | * |
| 4762 | * This function processes the information provided in the probe |
| 4763 | * information struct @ent, allocates the necessary ATA and SCSI |
| 4764 | * host information structures, initializes them, and registers |
| 4765 | * everything with requisite kernel subsystems. |
| 4766 | * |
| 4767 | * This function requests irqs, probes the ATA bus, and probes |
| 4768 | * the SCSI bus. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4769 | * |
| 4770 | * LOCKING: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4771 | * PCI/etc. bus probe sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4772 | * |
| 4773 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 4774 | * Number of ports registered. Zero on error (no ports registered). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4775 | */ |
| 4776 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 4777 | int ata_device_add(const struct ata_probe_ent *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4778 | { |
| 4779 | unsigned int count = 0, i; |
| 4780 | struct device *dev = ent->dev; |
| 4781 | struct ata_host_set *host_set; |
| 4782 | |
| 4783 | DPRINTK("ENTER\n"); |
| 4784 | /* alloc a container for our list of ATA ports (buses) */ |
Randy Dunlap | 57f3bda | 2005-10-28 20:37:23 -0700 | [diff] [blame] | 4785 | host_set = kzalloc(sizeof(struct ata_host_set) + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4786 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
| 4787 | if (!host_set) |
| 4788 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4789 | spin_lock_init(&host_set->lock); |
| 4790 | |
| 4791 | host_set->dev = dev; |
| 4792 | host_set->n_ports = ent->n_ports; |
| 4793 | host_set->irq = ent->irq; |
| 4794 | host_set->mmio_base = ent->mmio_base; |
| 4795 | host_set->private_data = ent->private_data; |
| 4796 | host_set->ops = ent->port_ops; |
| 4797 | |
| 4798 | /* register each port bound to this device */ |
| 4799 | for (i = 0; i < ent->n_ports; i++) { |
| 4800 | struct ata_port *ap; |
| 4801 | unsigned long xfer_mode_mask; |
| 4802 | |
| 4803 | ap = ata_host_add(ent, host_set, i); |
| 4804 | if (!ap) |
| 4805 | goto err_out; |
| 4806 | |
| 4807 | host_set->ports[i] = ap; |
| 4808 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | |
| 4809 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | |
| 4810 | (ap->pio_mask << ATA_SHIFT_PIO); |
| 4811 | |
| 4812 | /* print per-port info to dmesg */ |
| 4813 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " |
| 4814 | "bmdma 0x%lX irq %lu\n", |
| 4815 | ap->id, |
| 4816 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', |
| 4817 | ata_mode_string(xfer_mode_mask), |
| 4818 | ap->ioaddr.cmd_addr, |
| 4819 | ap->ioaddr.ctl_addr, |
| 4820 | ap->ioaddr.bmdma_addr, |
| 4821 | ent->irq); |
| 4822 | |
| 4823 | ata_chk_status(ap); |
| 4824 | host_set->ops->irq_clear(ap); |
| 4825 | count++; |
| 4826 | } |
| 4827 | |
Randy Dunlap | 57f3bda | 2005-10-28 20:37:23 -0700 | [diff] [blame] | 4828 | if (!count) |
| 4829 | goto err_free_ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4830 | |
| 4831 | /* obtain irq, that is shared between channels */ |
| 4832 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, |
| 4833 | DRV_NAME, host_set)) |
| 4834 | goto err_out; |
| 4835 | |
| 4836 | /* perform each probe synchronously */ |
| 4837 | DPRINTK("probe begin\n"); |
| 4838 | for (i = 0; i < count; i++) { |
| 4839 | struct ata_port *ap; |
| 4840 | int rc; |
| 4841 | |
| 4842 | ap = host_set->ports[i]; |
| 4843 | |
| 4844 | DPRINTK("ata%u: probe begin\n", ap->id); |
| 4845 | rc = ata_bus_probe(ap); |
| 4846 | DPRINTK("ata%u: probe end\n", ap->id); |
| 4847 | |
| 4848 | if (rc) { |
| 4849 | /* FIXME: do something useful here? |
| 4850 | * Current libata behavior will |
| 4851 | * tear down everything when |
| 4852 | * the module is removed |
| 4853 | * or the h/w is unplugged. |
| 4854 | */ |
| 4855 | } |
| 4856 | |
| 4857 | rc = scsi_add_host(ap->host, dev); |
| 4858 | if (rc) { |
| 4859 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", |
| 4860 | ap->id); |
| 4861 | /* FIXME: do something useful here */ |
| 4862 | /* FIXME: handle unconditional calls to |
| 4863 | * scsi_scan_host and ata_host_remove, below, |
| 4864 | * at the very least |
| 4865 | */ |
| 4866 | } |
| 4867 | } |
| 4868 | |
| 4869 | /* probes are done, now scan each port's disk(s) */ |
| 4870 | DPRINTK("probe begin\n"); |
| 4871 | for (i = 0; i < count; i++) { |
| 4872 | struct ata_port *ap = host_set->ports[i]; |
| 4873 | |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 4874 | ata_scsi_scan_host(ap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4875 | } |
| 4876 | |
| 4877 | dev_set_drvdata(dev, host_set); |
| 4878 | |
| 4879 | VPRINTK("EXIT, returning %u\n", ent->n_ports); |
| 4880 | return ent->n_ports; /* success */ |
| 4881 | |
| 4882 | err_out: |
| 4883 | for (i = 0; i < count; i++) { |
| 4884 | ata_host_remove(host_set->ports[i], 1); |
| 4885 | scsi_host_put(host_set->ports[i]->host); |
| 4886 | } |
Randy Dunlap | 57f3bda | 2005-10-28 20:37:23 -0700 | [diff] [blame] | 4887 | err_free_ret: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4888 | kfree(host_set); |
| 4889 | VPRINTK("EXIT, returning 0\n"); |
| 4890 | return 0; |
| 4891 | } |
| 4892 | |
| 4893 | /** |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 4894 | * ata_host_set_remove - PCI layer callback for device removal |
| 4895 | * @host_set: ATA host set that was removed |
| 4896 | * |
| 4897 | * Unregister all objects associated with this host set. Free those |
| 4898 | * objects. |
| 4899 | * |
| 4900 | * LOCKING: |
| 4901 | * Inherited from calling layer (may sleep). |
| 4902 | */ |
| 4903 | |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 4904 | void ata_host_set_remove(struct ata_host_set *host_set) |
| 4905 | { |
| 4906 | struct ata_port *ap; |
| 4907 | unsigned int i; |
| 4908 | |
| 4909 | for (i = 0; i < host_set->n_ports; i++) { |
| 4910 | ap = host_set->ports[i]; |
| 4911 | scsi_remove_host(ap->host); |
| 4912 | } |
| 4913 | |
| 4914 | free_irq(host_set->irq, host_set); |
| 4915 | |
| 4916 | for (i = 0; i < host_set->n_ports; i++) { |
| 4917 | ap = host_set->ports[i]; |
| 4918 | |
| 4919 | ata_scsi_release(ap->host); |
| 4920 | |
| 4921 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { |
| 4922 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 4923 | |
| 4924 | if (ioaddr->cmd_addr == 0x1f0) |
| 4925 | release_region(0x1f0, 8); |
| 4926 | else if (ioaddr->cmd_addr == 0x170) |
| 4927 | release_region(0x170, 8); |
| 4928 | } |
| 4929 | |
| 4930 | scsi_host_put(ap->host); |
| 4931 | } |
| 4932 | |
| 4933 | if (host_set->ops->host_stop) |
| 4934 | host_set->ops->host_stop(host_set); |
| 4935 | |
| 4936 | kfree(host_set); |
| 4937 | } |
| 4938 | |
| 4939 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4940 | * ata_scsi_release - SCSI layer callback hook for host unload |
| 4941 | * @host: libata host to be unloaded |
| 4942 | * |
| 4943 | * Performs all duties necessary to shut down a libata port... |
| 4944 | * Kill port kthread, disable port, and release resources. |
| 4945 | * |
| 4946 | * LOCKING: |
| 4947 | * Inherited from SCSI layer. |
| 4948 | * |
| 4949 | * RETURNS: |
| 4950 | * One. |
| 4951 | */ |
| 4952 | |
| 4953 | int ata_scsi_release(struct Scsi_Host *host) |
| 4954 | { |
| 4955 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; |
| 4956 | |
| 4957 | DPRINTK("ENTER\n"); |
| 4958 | |
| 4959 | ap->ops->port_disable(ap); |
| 4960 | ata_host_remove(ap, 0); |
| 4961 | |
| 4962 | DPRINTK("EXIT\n"); |
| 4963 | return 1; |
| 4964 | } |
| 4965 | |
| 4966 | /** |
| 4967 | * ata_std_ports - initialize ioaddr with standard port offsets. |
| 4968 | * @ioaddr: IO address structure to be initialized |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4969 | * |
| 4970 | * Utility function which initializes data_addr, error_addr, |
| 4971 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 4972 | * device_addr, status_addr, and command_addr to standard offsets |
| 4973 | * relative to cmd_addr. |
| 4974 | * |
| 4975 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4976 | */ |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 4977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4978 | void ata_std_ports(struct ata_ioports *ioaddr) |
| 4979 | { |
| 4980 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 4981 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 4982 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 4983 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 4984 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 4985 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 4986 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 4987 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 4988 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 4989 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 4990 | } |
| 4991 | |
| 4992 | static struct ata_probe_ent * |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 4993 | ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4994 | { |
| 4995 | struct ata_probe_ent *probe_ent; |
| 4996 | |
Randy Dunlap | 57f3bda | 2005-10-28 20:37:23 -0700 | [diff] [blame] | 4997 | probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4998 | if (!probe_ent) { |
| 4999 | printk(KERN_ERR DRV_NAME "(%s): out of memory\n", |
| 5000 | kobject_name(&(dev->kobj))); |
| 5001 | return NULL; |
| 5002 | } |
| 5003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5004 | INIT_LIST_HEAD(&probe_ent->node); |
| 5005 | probe_ent->dev = dev; |
| 5006 | |
| 5007 | probe_ent->sht = port->sht; |
| 5008 | probe_ent->host_flags = port->host_flags; |
| 5009 | probe_ent->pio_mask = port->pio_mask; |
| 5010 | probe_ent->mwdma_mask = port->mwdma_mask; |
| 5011 | probe_ent->udma_mask = port->udma_mask; |
| 5012 | probe_ent->port_ops = port->port_ops; |
| 5013 | |
| 5014 | return probe_ent; |
| 5015 | } |
| 5016 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5017 | |
| 5018 | |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 5019 | #ifdef CONFIG_PCI |
| 5020 | |
| 5021 | void ata_pci_host_stop (struct ata_host_set *host_set) |
| 5022 | { |
| 5023 | struct pci_dev *pdev = to_pci_dev(host_set->dev); |
| 5024 | |
| 5025 | pci_iounmap(pdev, host_set->mmio_base); |
| 5026 | } |
| 5027 | |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5028 | /** |
| 5029 | * ata_pci_init_native_mode - Initialize native-mode driver |
| 5030 | * @pdev: pci device to be initialized |
| 5031 | * @port: array[2] of pointers to port info structures. |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5032 | * @ports: bitmap of ports present |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5033 | * |
| 5034 | * Utility function which allocates and initializes an |
| 5035 | * ata_probe_ent structure for a standard dual-port |
| 5036 | * PIO-based IDE controller. The returned ata_probe_ent |
| 5037 | * structure can be passed to ata_device_add(). The returned |
| 5038 | * ata_probe_ent structure should then be freed with kfree(). |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5039 | * |
| 5040 | * The caller need only pass the address of the primary port, the |
| 5041 | * secondary will be deduced automatically. If the device has non |
| 5042 | * standard secondary port mappings this function can be called twice, |
| 5043 | * once for each interface. |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5044 | */ |
| 5045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5046 | struct ata_probe_ent * |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5047 | 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] | 5048 | { |
| 5049 | struct ata_probe_ent *probe_ent = |
| 5050 | ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5051 | int p = 0; |
| 5052 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5053 | if (!probe_ent) |
| 5054 | return NULL; |
| 5055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5056 | probe_ent->irq = pdev->irq; |
| 5057 | probe_ent->irq_flags = SA_SHIRQ; |
Alan Cox | e99f8b5 | 2005-11-08 14:09:44 +0000 | [diff] [blame] | 5058 | probe_ent->private_data = port[0]->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5059 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5060 | if (ports & ATA_PORT_PRIMARY) { |
| 5061 | probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0); |
| 5062 | probe_ent->port[p].altstatus_addr = |
| 5063 | probe_ent->port[p].ctl_addr = |
| 5064 | pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS; |
| 5065 | probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4); |
| 5066 | ata_std_ports(&probe_ent->port[p]); |
| 5067 | p++; |
| 5068 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5069 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5070 | if (ports & ATA_PORT_SECONDARY) { |
| 5071 | probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2); |
| 5072 | probe_ent->port[p].altstatus_addr = |
| 5073 | probe_ent->port[p].ctl_addr = |
| 5074 | pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS; |
| 5075 | probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8; |
| 5076 | ata_std_ports(&probe_ent->port[p]); |
| 5077 | p++; |
| 5078 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5079 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5080 | probe_ent->n_ports = p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5081 | return probe_ent; |
| 5082 | } |
| 5083 | |
Jeff Garzik | 0f0d519 | 2005-10-30 06:41:29 -0500 | [diff] [blame] | 5084 | 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] | 5085 | { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5086 | struct ata_probe_ent *probe_ent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5087 | |
Jeff Garzik | 0f0d519 | 2005-10-30 06:41:29 -0500 | [diff] [blame] | 5088 | probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5089 | if (!probe_ent) |
| 5090 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5092 | probe_ent->legacy_mode = 1; |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5093 | probe_ent->n_ports = 1; |
| 5094 | probe_ent->hard_port_no = port_num; |
Alan Cox | e99f8b5 | 2005-11-08 14:09:44 +0000 | [diff] [blame] | 5095 | probe_ent->private_data = port->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5096 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5097 | switch(port_num) |
| 5098 | { |
| 5099 | case 0: |
| 5100 | probe_ent->irq = 14; |
| 5101 | probe_ent->port[0].cmd_addr = 0x1f0; |
| 5102 | probe_ent->port[0].altstatus_addr = |
| 5103 | probe_ent->port[0].ctl_addr = 0x3f6; |
| 5104 | break; |
| 5105 | case 1: |
| 5106 | probe_ent->irq = 15; |
| 5107 | probe_ent->port[0].cmd_addr = 0x170; |
| 5108 | probe_ent->port[0].altstatus_addr = |
| 5109 | probe_ent->port[0].ctl_addr = 0x376; |
| 5110 | break; |
| 5111 | } |
| 5112 | 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] | 5113 | ata_std_ports(&probe_ent->port[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5114 | return probe_ent; |
| 5115 | } |
| 5116 | |
| 5117 | /** |
| 5118 | * ata_pci_init_one - Initialize/register PCI IDE host controller |
| 5119 | * @pdev: Controller to be initialized |
| 5120 | * @port_info: Information from low-level host driver |
| 5121 | * @n_ports: Number of ports attached to host controller |
| 5122 | * |
Edward Falk | 0baab86 | 2005-06-02 18:17:13 -0400 | [diff] [blame] | 5123 | * This is a helper function which can be called from a driver's |
| 5124 | * xxx_init_one() probe function if the hardware uses traditional |
| 5125 | * IDE taskfile registers. |
| 5126 | * |
| 5127 | * This function calls pci_enable_device(), reserves its register |
| 5128 | * regions, sets the dma mask, enables bus master mode, and calls |
| 5129 | * ata_device_add() |
| 5130 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5131 | * LOCKING: |
| 5132 | * Inherited from PCI layer (may sleep). |
| 5133 | * |
| 5134 | * RETURNS: |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 5135 | * Zero on success, negative on errno-based value on error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5136 | */ |
| 5137 | |
| 5138 | int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, |
| 5139 | unsigned int n_ports) |
| 5140 | { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5141 | struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5142 | struct ata_port_info *port[2]; |
| 5143 | u8 tmp8, mask; |
| 5144 | unsigned int legacy_mode = 0; |
| 5145 | int disable_dev_on_err = 1; |
| 5146 | int rc; |
| 5147 | |
| 5148 | DPRINTK("ENTER\n"); |
| 5149 | |
| 5150 | port[0] = port_info[0]; |
| 5151 | if (n_ports > 1) |
| 5152 | port[1] = port_info[1]; |
| 5153 | else |
| 5154 | port[1] = port[0]; |
| 5155 | |
| 5156 | if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0 |
| 5157 | && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5158 | /* TODO: What if one channel is in native mode ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5159 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); |
| 5160 | mask = (1 << 2) | (1 << 0); |
| 5161 | if ((tmp8 & mask) != mask) |
| 5162 | legacy_mode = (1 << 3); |
| 5163 | } |
| 5164 | |
| 5165 | /* FIXME... */ |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5166 | if ((!legacy_mode) && (n_ports > 2)) { |
| 5167 | printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n"); |
| 5168 | n_ports = 2; |
| 5169 | /* For now */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5170 | } |
| 5171 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5172 | /* FIXME: Really for ATA it isn't safe because the device may be |
| 5173 | multi-purpose and we want to leave it alone if it was already |
| 5174 | enabled. Secondly for shared use as Arjan says we want refcounting |
| 5175 | |
| 5176 | Checking dev->is_enabled is insufficient as this is not set at |
| 5177 | boot for the primary video which is BIOS enabled |
| 5178 | */ |
| 5179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5180 | rc = pci_enable_device(pdev); |
| 5181 | if (rc) |
| 5182 | return rc; |
| 5183 | |
| 5184 | rc = pci_request_regions(pdev, DRV_NAME); |
| 5185 | if (rc) { |
| 5186 | disable_dev_on_err = 0; |
| 5187 | goto err_out; |
| 5188 | } |
| 5189 | |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5190 | /* FIXME: Should use platform specific mappers for legacy port ranges */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5191 | if (legacy_mode) { |
| 5192 | if (!request_region(0x1f0, 8, "libata")) { |
| 5193 | struct resource *conflict, res; |
| 5194 | res.start = 0x1f0; |
| 5195 | res.end = 0x1f0 + 8 - 1; |
| 5196 | conflict = ____request_resource(&ioport_resource, &res); |
| 5197 | if (!strcmp(conflict->name, "libata")) |
| 5198 | legacy_mode |= (1 << 0); |
| 5199 | else { |
| 5200 | disable_dev_on_err = 0; |
| 5201 | printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n"); |
| 5202 | } |
| 5203 | } else |
| 5204 | legacy_mode |= (1 << 0); |
| 5205 | |
| 5206 | if (!request_region(0x170, 8, "libata")) { |
| 5207 | struct resource *conflict, res; |
| 5208 | res.start = 0x170; |
| 5209 | res.end = 0x170 + 8 - 1; |
| 5210 | conflict = ____request_resource(&ioport_resource, &res); |
| 5211 | if (!strcmp(conflict->name, "libata")) |
| 5212 | legacy_mode |= (1 << 1); |
| 5213 | else { |
| 5214 | disable_dev_on_err = 0; |
| 5215 | printk(KERN_WARNING "ata: 0x170 IDE port busy\n"); |
| 5216 | } |
| 5217 | } else |
| 5218 | legacy_mode |= (1 << 1); |
| 5219 | } |
| 5220 | |
| 5221 | /* we have legacy mode, but all ports are unavailable */ |
| 5222 | if (legacy_mode == (1 << 3)) { |
| 5223 | rc = -EBUSY; |
| 5224 | goto err_out_regions; |
| 5225 | } |
| 5226 | |
| 5227 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 5228 | if (rc) |
| 5229 | goto err_out_regions; |
| 5230 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 5231 | if (rc) |
| 5232 | goto err_out_regions; |
| 5233 | |
| 5234 | if (legacy_mode) { |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5235 | if (legacy_mode & (1 << 0)) |
Jeff Garzik | 0f0d519 | 2005-10-30 06:41:29 -0500 | [diff] [blame] | 5236 | probe_ent = ata_pci_init_legacy_port(pdev, port[0], 0); |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5237 | if (legacy_mode & (1 << 1)) |
Jeff Garzik | 0f0d519 | 2005-10-30 06:41:29 -0500 | [diff] [blame] | 5238 | probe_ent2 = ata_pci_init_legacy_port(pdev, port[1], 1); |
Alan Cox | 47a8659 | 2005-10-04 08:09:19 -0400 | [diff] [blame] | 5239 | } else { |
| 5240 | if (n_ports == 2) |
| 5241 | probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); |
| 5242 | else |
| 5243 | probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY); |
| 5244 | } |
| 5245 | if (!probe_ent && !probe_ent2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5246 | rc = -ENOMEM; |
| 5247 | goto err_out_regions; |
| 5248 | } |
| 5249 | |
| 5250 | pci_set_master(pdev); |
| 5251 | |
| 5252 | /* FIXME: check ata_device_add return */ |
| 5253 | if (legacy_mode) { |
| 5254 | if (legacy_mode & (1 << 0)) |
| 5255 | ata_device_add(probe_ent); |
| 5256 | if (legacy_mode & (1 << 1)) |
| 5257 | ata_device_add(probe_ent2); |
| 5258 | } else |
| 5259 | ata_device_add(probe_ent); |
| 5260 | |
| 5261 | kfree(probe_ent); |
| 5262 | kfree(probe_ent2); |
| 5263 | |
| 5264 | return 0; |
| 5265 | |
| 5266 | err_out_regions: |
| 5267 | if (legacy_mode & (1 << 0)) |
| 5268 | release_region(0x1f0, 8); |
| 5269 | if (legacy_mode & (1 << 1)) |
| 5270 | release_region(0x170, 8); |
| 5271 | pci_release_regions(pdev); |
| 5272 | err_out: |
| 5273 | if (disable_dev_on_err) |
| 5274 | pci_disable_device(pdev); |
| 5275 | return rc; |
| 5276 | } |
| 5277 | |
| 5278 | /** |
| 5279 | * ata_pci_remove_one - PCI layer callback for device removal |
| 5280 | * @pdev: PCI device that was removed |
| 5281 | * |
| 5282 | * PCI layer indicates to libata via this hook that |
Randy Dunlap | 6f0ef4f | 2005-10-25 01:44:30 -0400 | [diff] [blame] | 5283 | * hot-unplug or module unload event has occurred. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5284 | * Handle this by unregistering all objects associated |
| 5285 | * with this PCI device. Free those objects. Then finally |
| 5286 | * release PCI resources and disable device. |
| 5287 | * |
| 5288 | * LOCKING: |
| 5289 | * Inherited from PCI layer (may sleep). |
| 5290 | */ |
| 5291 | |
| 5292 | void ata_pci_remove_one (struct pci_dev *pdev) |
| 5293 | { |
| 5294 | struct device *dev = pci_dev_to_dev(pdev); |
| 5295 | struct ata_host_set *host_set = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5296 | |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 5297 | ata_host_set_remove(host_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5298 | pci_release_regions(pdev); |
| 5299 | pci_disable_device(pdev); |
| 5300 | dev_set_drvdata(dev, NULL); |
| 5301 | } |
| 5302 | |
| 5303 | /* move to PCI subsystem */ |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 5304 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5305 | { |
| 5306 | unsigned long tmp = 0; |
| 5307 | |
| 5308 | switch (bits->width) { |
| 5309 | case 1: { |
| 5310 | u8 tmp8 = 0; |
| 5311 | pci_read_config_byte(pdev, bits->reg, &tmp8); |
| 5312 | tmp = tmp8; |
| 5313 | break; |
| 5314 | } |
| 5315 | case 2: { |
| 5316 | u16 tmp16 = 0; |
| 5317 | pci_read_config_word(pdev, bits->reg, &tmp16); |
| 5318 | tmp = tmp16; |
| 5319 | break; |
| 5320 | } |
| 5321 | case 4: { |
| 5322 | u32 tmp32 = 0; |
| 5323 | pci_read_config_dword(pdev, bits->reg, &tmp32); |
| 5324 | tmp = tmp32; |
| 5325 | break; |
| 5326 | } |
| 5327 | |
| 5328 | default: |
| 5329 | return -EINVAL; |
| 5330 | } |
| 5331 | |
| 5332 | tmp &= bits->mask; |
| 5333 | |
| 5334 | return (tmp == bits->val) ? 1 : 0; |
| 5335 | } |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5336 | |
| 5337 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) |
| 5338 | { |
| 5339 | pci_save_state(pdev); |
| 5340 | pci_disable_device(pdev); |
| 5341 | pci_set_power_state(pdev, PCI_D3hot); |
| 5342 | return 0; |
| 5343 | } |
| 5344 | |
| 5345 | int ata_pci_device_resume(struct pci_dev *pdev) |
| 5346 | { |
| 5347 | pci_set_power_state(pdev, PCI_D0); |
| 5348 | pci_restore_state(pdev); |
| 5349 | pci_enable_device(pdev); |
| 5350 | pci_set_master(pdev); |
| 5351 | return 0; |
| 5352 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5353 | #endif /* CONFIG_PCI */ |
| 5354 | |
| 5355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5356 | static int __init ata_init(void) |
| 5357 | { |
| 5358 | ata_wq = create_workqueue("ata"); |
| 5359 | if (!ata_wq) |
| 5360 | return -ENOMEM; |
| 5361 | |
| 5362 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| 5363 | return 0; |
| 5364 | } |
| 5365 | |
| 5366 | static void __exit ata_exit(void) |
| 5367 | { |
| 5368 | destroy_workqueue(ata_wq); |
| 5369 | } |
| 5370 | |
| 5371 | module_init(ata_init); |
| 5372 | module_exit(ata_exit); |
| 5373 | |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 5374 | static unsigned long ratelimit_time; |
| 5375 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; |
| 5376 | |
| 5377 | int ata_ratelimit(void) |
| 5378 | { |
| 5379 | int rc; |
| 5380 | unsigned long flags; |
| 5381 | |
| 5382 | spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| 5383 | |
| 5384 | if (time_after(jiffies, ratelimit_time)) { |
| 5385 | rc = 1; |
| 5386 | ratelimit_time = jiffies + (HZ/5); |
| 5387 | } else |
| 5388 | rc = 0; |
| 5389 | |
| 5390 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| 5391 | |
| 5392 | return rc; |
| 5393 | } |
| 5394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5395 | /* |
| 5396 | * libata is essentially a library of internal helper functions for |
| 5397 | * low-level ATA host controller drivers. As such, the API/ABI is |
| 5398 | * likely to change as new drivers are added and updated. |
| 5399 | * Do not depend on ABI/API stability. |
| 5400 | */ |
| 5401 | |
| 5402 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| 5403 | EXPORT_SYMBOL_GPL(ata_std_ports); |
| 5404 | EXPORT_SYMBOL_GPL(ata_device_add); |
Alan Cox | 17b1445 | 2005-09-15 15:44:00 +0100 | [diff] [blame] | 5405 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5406 | EXPORT_SYMBOL_GPL(ata_sg_init); |
| 5407 | EXPORT_SYMBOL_GPL(ata_sg_init_one); |
| 5408 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
| 5409 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
| 5410 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
| 5411 | EXPORT_SYMBOL_GPL(ata_tf_load); |
| 5412 | EXPORT_SYMBOL_GPL(ata_tf_read); |
| 5413 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| 5414 | EXPORT_SYMBOL_GPL(ata_std_dev_select); |
| 5415 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| 5416 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| 5417 | EXPORT_SYMBOL_GPL(ata_check_status); |
| 5418 | EXPORT_SYMBOL_GPL(ata_altstatus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5419 | EXPORT_SYMBOL_GPL(ata_exec_command); |
| 5420 | EXPORT_SYMBOL_GPL(ata_port_start); |
| 5421 | EXPORT_SYMBOL_GPL(ata_port_stop); |
Jeff Garzik | aa8f0dc | 2005-05-26 21:54:27 -0400 | [diff] [blame] | 5422 | EXPORT_SYMBOL_GPL(ata_host_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5423 | EXPORT_SYMBOL_GPL(ata_interrupt); |
| 5424 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
| 5425 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 5426 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 5427 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 5428 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 5429 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
| 5430 | EXPORT_SYMBOL_GPL(ata_port_probe); |
| 5431 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
| 5432 | EXPORT_SYMBOL_GPL(__sata_phy_reset); |
| 5433 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
| 5434 | EXPORT_SYMBOL_GPL(ata_port_disable); |
Jeff Garzik | 67846b3 | 2005-10-05 02:58:32 -0400 | [diff] [blame] | 5435 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5436 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| 5437 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
| 5438 | EXPORT_SYMBOL_GPL(ata_scsi_error); |
| 5439 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
| 5440 | EXPORT_SYMBOL_GPL(ata_scsi_release); |
| 5441 | EXPORT_SYMBOL_GPL(ata_host_intr); |
| 5442 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
| 5443 | EXPORT_SYMBOL_GPL(ata_dev_id_string); |
Brad Campbell | 6f2f381 | 2005-05-12 15:07:47 -0400 | [diff] [blame] | 5444 | EXPORT_SYMBOL_GPL(ata_dev_config); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5445 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
Tejun Heo | a72ec4c | 2006-01-23 13:09:37 +0900 | [diff] [blame] | 5446 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
| 5447 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5448 | |
Alan Cox | 1bc4ccf | 2006-01-09 17:18:14 +0000 | [diff] [blame] | 5449 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
Alan Cox | 452503f | 2005-10-21 19:01:32 -0400 | [diff] [blame] | 5450 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
| 5451 | EXPORT_SYMBOL_GPL(ata_timing_merge); |
| 5452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5453 | #ifdef CONFIG_PCI |
| 5454 | EXPORT_SYMBOL_GPL(pci_test_config_bits); |
Jeff Garzik | 374b187 | 2005-08-30 05:42:52 -0400 | [diff] [blame] | 5455 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5456 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
| 5457 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
| 5458 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5459 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
| 5460 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5461 | #endif /* CONFIG_PCI */ |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 5462 | |
| 5463 | EXPORT_SYMBOL_GPL(ata_device_suspend); |
| 5464 | EXPORT_SYMBOL_GPL(ata_device_resume); |
| 5465 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); |
| 5466 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); |