Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 1 | /* |
Dave Jones | f3a03b0 | 2007-07-16 11:23:03 -0400 | [diff] [blame] | 2 | * libata-sff.c - helper library for PCI IDE BMDMA |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2003-2006 Red Hat, Inc. All rights reserved. |
| 9 | * Copyright 2003-2006 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 | * |
| 33 | */ |
| 34 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 35 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/gfp.h> |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 37 | #include <linux/pci.h> |
| 38 | #include <linux/libata.h> |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 39 | #include <linux/highmem.h> |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 40 | |
| 41 | #include "libata.h" |
| 42 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 43 | static struct workqueue_struct *ata_sff_wq; |
| 44 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 45 | const struct ata_port_operations ata_sff_port_ops = { |
| 46 | .inherits = &ata_base_port_ops, |
| 47 | |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 48 | .qc_prep = ata_noop_qc_prep, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 49 | .qc_issue = ata_sff_qc_issue, |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 50 | .qc_fill_rtf = ata_sff_qc_fill_rtf, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 51 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 52 | .freeze = ata_sff_freeze, |
| 53 | .thaw = ata_sff_thaw, |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 54 | .prereset = ata_sff_prereset, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 55 | .softreset = ata_sff_softreset, |
Tejun Heo | 57c9efd | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 56 | .hardreset = sata_sff_hardreset, |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 57 | .postreset = ata_sff_postreset, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 58 | .error_handler = ata_sff_error_handler, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 59 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 60 | .sff_dev_select = ata_sff_dev_select, |
| 61 | .sff_check_status = ata_sff_check_status, |
| 62 | .sff_tf_load = ata_sff_tf_load, |
| 63 | .sff_tf_read = ata_sff_tf_read, |
| 64 | .sff_exec_command = ata_sff_exec_command, |
| 65 | .sff_data_xfer = ata_sff_data_xfer, |
Tejun Heo | 8244cd0 | 2010-05-10 21:41:36 +0200 | [diff] [blame] | 66 | .sff_drain_fifo = ata_sff_drain_fifo, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 67 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 68 | .lost_interrupt = ata_sff_lost_interrupt, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 69 | }; |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 70 | EXPORT_SYMBOL_GPL(ata_sff_port_ops); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 71 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 72 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 73 | * ata_sff_check_status - Read device status reg & clear interrupt |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 74 | * @ap: port where the device is |
| 75 | * |
| 76 | * Reads ATA taskfile status register for currently-selected device |
| 77 | * and return its value. This also clears pending interrupts |
| 78 | * from this device |
| 79 | * |
| 80 | * LOCKING: |
| 81 | * Inherited from caller. |
| 82 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 83 | u8 ata_sff_check_status(struct ata_port *ap) |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 84 | { |
| 85 | return ioread8(ap->ioaddr.status_addr); |
| 86 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 87 | EXPORT_SYMBOL_GPL(ata_sff_check_status); |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 88 | |
| 89 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 90 | * ata_sff_altstatus - Read device alternate status reg |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 91 | * @ap: port where the device is |
| 92 | * |
| 93 | * Reads ATA taskfile alternate status register for |
| 94 | * currently-selected device and return its value. |
| 95 | * |
| 96 | * Note: may NOT be used as the check_altstatus() entry in |
| 97 | * ata_port_operations. |
| 98 | * |
| 99 | * LOCKING: |
| 100 | * Inherited from caller. |
| 101 | */ |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 102 | static u8 ata_sff_altstatus(struct ata_port *ap) |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 103 | { |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 104 | if (ap->ops->sff_check_altstatus) |
| 105 | return ap->ops->sff_check_altstatus(ap); |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 106 | |
| 107 | return ioread8(ap->ioaddr.altstatus_addr); |
| 108 | } |
| 109 | |
| 110 | /** |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 111 | * ata_sff_irq_status - Check if the device is busy |
| 112 | * @ap: port where the device is |
| 113 | * |
| 114 | * Determine if the port is currently busy. Uses altstatus |
| 115 | * if available in order to avoid clearing shared IRQ status |
| 116 | * when finding an IRQ source. Non ctl capable devices don't |
| 117 | * share interrupt lines fortunately for us. |
| 118 | * |
| 119 | * LOCKING: |
| 120 | * Inherited from caller. |
| 121 | */ |
| 122 | static u8 ata_sff_irq_status(struct ata_port *ap) |
| 123 | { |
| 124 | u8 status; |
| 125 | |
| 126 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { |
| 127 | status = ata_sff_altstatus(ap); |
| 128 | /* Not us: We are busy */ |
| 129 | if (status & ATA_BUSY) |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 130 | return status; |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 131 | } |
| 132 | /* Clear INTRQ latch */ |
Hugh Dickins | 6311c90 | 2008-06-05 14:44:39 +0100 | [diff] [blame] | 133 | status = ap->ops->sff_check_status(ap); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 134 | return status; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * ata_sff_sync - Flush writes |
| 139 | * @ap: Port to wait for. |
| 140 | * |
| 141 | * CAUTION: |
| 142 | * If we have an mmio device with no ctl and no altstatus |
| 143 | * method this will fail. No such devices are known to exist. |
| 144 | * |
| 145 | * LOCKING: |
| 146 | * Inherited from caller. |
| 147 | */ |
| 148 | |
| 149 | static void ata_sff_sync(struct ata_port *ap) |
| 150 | { |
| 151 | if (ap->ops->sff_check_altstatus) |
| 152 | ap->ops->sff_check_altstatus(ap); |
| 153 | else if (ap->ioaddr.altstatus_addr) |
| 154 | ioread8(ap->ioaddr.altstatus_addr); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * ata_sff_pause - Flush writes and wait 400nS |
| 159 | * @ap: Port to pause for. |
| 160 | * |
| 161 | * CAUTION: |
| 162 | * If we have an mmio device with no ctl and no altstatus |
| 163 | * method this will fail. No such devices are known to exist. |
| 164 | * |
| 165 | * LOCKING: |
| 166 | * Inherited from caller. |
| 167 | */ |
| 168 | |
| 169 | void ata_sff_pause(struct ata_port *ap) |
| 170 | { |
| 171 | ata_sff_sync(ap); |
| 172 | ndelay(400); |
| 173 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 174 | EXPORT_SYMBOL_GPL(ata_sff_pause); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 175 | |
| 176 | /** |
| 177 | * ata_sff_dma_pause - Pause before commencing DMA |
| 178 | * @ap: Port to pause for. |
| 179 | * |
| 180 | * Perform I/O fencing and ensure sufficient cycle delays occur |
| 181 | * for the HDMA1:0 transition |
| 182 | */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 183 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 184 | void ata_sff_dma_pause(struct ata_port *ap) |
| 185 | { |
| 186 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { |
| 187 | /* An altstatus read will cause the needed delay without |
| 188 | messing up the IRQ status */ |
| 189 | ata_sff_altstatus(ap); |
| 190 | return; |
| 191 | } |
| 192 | /* There are no DMA controllers without ctl. BUG here to ensure |
| 193 | we never violate the HDMA1:0 transition timing and risk |
| 194 | corruption. */ |
| 195 | BUG(); |
| 196 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 197 | EXPORT_SYMBOL_GPL(ata_sff_dma_pause); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 198 | |
| 199 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 200 | * ata_sff_busy_sleep - sleep until BSY clears, or timeout |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 201 | * @ap: port containing status register to be polled |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 202 | * @tmout_pat: impatience timeout in msecs |
| 203 | * @tmout: overall timeout in msecs |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 204 | * |
| 205 | * Sleep until ATA Status register bit BSY clears, |
| 206 | * or a timeout occurs. |
| 207 | * |
| 208 | * LOCKING: |
| 209 | * Kernel thread context (may sleep). |
| 210 | * |
| 211 | * RETURNS: |
| 212 | * 0 on success, -errno otherwise. |
| 213 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 214 | int ata_sff_busy_sleep(struct ata_port *ap, |
| 215 | unsigned long tmout_pat, unsigned long tmout) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 216 | { |
| 217 | unsigned long timer_start, timeout; |
| 218 | u8 status; |
| 219 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 220 | status = ata_sff_busy_wait(ap, ATA_BUSY, 300); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 221 | timer_start = jiffies; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 222 | timeout = ata_deadline(timer_start, tmout_pat); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 223 | while (status != 0xff && (status & ATA_BUSY) && |
| 224 | time_before(jiffies, timeout)) { |
| 225 | msleep(50); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 226 | status = ata_sff_busy_wait(ap, ATA_BUSY, 3); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | if (status != 0xff && (status & ATA_BUSY)) |
| 230 | ata_port_printk(ap, KERN_WARNING, |
| 231 | "port is slow to respond, please be patient " |
| 232 | "(Status 0x%x)\n", status); |
| 233 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 234 | timeout = ata_deadline(timer_start, tmout); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 235 | while (status != 0xff && (status & ATA_BUSY) && |
| 236 | time_before(jiffies, timeout)) { |
| 237 | msleep(50); |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 238 | status = ap->ops->sff_check_status(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | if (status == 0xff) |
| 242 | return -ENODEV; |
| 243 | |
| 244 | if (status & ATA_BUSY) { |
| 245 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
| 246 | "(%lu secs, Status 0x%x)\n", |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 247 | DIV_ROUND_UP(tmout, 1000), status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 248 | return -EBUSY; |
| 249 | } |
| 250 | |
| 251 | return 0; |
| 252 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 253 | EXPORT_SYMBOL_GPL(ata_sff_busy_sleep); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 254 | |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 255 | static int ata_sff_check_ready(struct ata_link *link) |
| 256 | { |
| 257 | u8 status = link->ap->ops->sff_check_status(link->ap); |
| 258 | |
Tejun Heo | 78ab88f | 2008-05-01 23:41:41 +0900 | [diff] [blame] | 259 | return ata_check_ready(status); |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 260 | } |
| 261 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 262 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 263 | * ata_sff_wait_ready - sleep until BSY clears, or timeout |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 264 | * @link: SFF link to wait ready status for |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 265 | * @deadline: deadline jiffies for the operation |
| 266 | * |
| 267 | * Sleep until ATA Status register bit BSY clears, or timeout |
| 268 | * occurs. |
| 269 | * |
| 270 | * LOCKING: |
| 271 | * Kernel thread context (may sleep). |
| 272 | * |
| 273 | * RETURNS: |
| 274 | * 0 on success, -errno otherwise. |
| 275 | */ |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 276 | int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 277 | { |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 278 | return ata_wait_ready(link, deadline, ata_sff_check_ready); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 279 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 280 | EXPORT_SYMBOL_GPL(ata_sff_wait_ready); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 281 | |
| 282 | /** |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 283 | * ata_sff_set_devctl - Write device control reg |
| 284 | * @ap: port where the device is |
| 285 | * @ctl: value to write |
| 286 | * |
| 287 | * Writes ATA taskfile device control register. |
| 288 | * |
| 289 | * Note: may NOT be used as the sff_set_devctl() entry in |
| 290 | * ata_port_operations. |
| 291 | * |
| 292 | * LOCKING: |
| 293 | * Inherited from caller. |
| 294 | */ |
| 295 | static void ata_sff_set_devctl(struct ata_port *ap, u8 ctl) |
| 296 | { |
| 297 | if (ap->ops->sff_set_devctl) |
| 298 | ap->ops->sff_set_devctl(ap, ctl); |
| 299 | else |
| 300 | iowrite8(ctl, ap->ioaddr.ctl_addr); |
| 301 | } |
| 302 | |
| 303 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 304 | * ata_sff_dev_select - Select device 0/1 on ATA bus |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 305 | * @ap: ATA channel to manipulate |
| 306 | * @device: ATA device (numbered from zero) to select |
| 307 | * |
| 308 | * Use the method defined in the ATA specification to |
| 309 | * make either device 0, or device 1, active on the |
| 310 | * ATA channel. Works with both PIO and MMIO. |
| 311 | * |
| 312 | * May be used as the dev_select() entry in ata_port_operations. |
| 313 | * |
| 314 | * LOCKING: |
| 315 | * caller. |
| 316 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 317 | void ata_sff_dev_select(struct ata_port *ap, unsigned int device) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 318 | { |
| 319 | u8 tmp; |
| 320 | |
| 321 | if (device == 0) |
| 322 | tmp = ATA_DEVICE_OBS; |
| 323 | else |
| 324 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 325 | |
| 326 | iowrite8(tmp, ap->ioaddr.device_addr); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 327 | ata_sff_pause(ap); /* needed; also flushes, for mmio */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 328 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 329 | EXPORT_SYMBOL_GPL(ata_sff_dev_select); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 330 | |
| 331 | /** |
| 332 | * ata_dev_select - Select device 0/1 on ATA bus |
| 333 | * @ap: ATA channel to manipulate |
| 334 | * @device: ATA device (numbered from zero) to select |
| 335 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 336 | * @can_sleep: non-zero if context allows sleeping |
| 337 | * |
| 338 | * Use the method defined in the ATA specification to |
| 339 | * make either device 0, or device 1, active on the |
| 340 | * ATA channel. |
| 341 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 342 | * This is a high-level version of ata_sff_dev_select(), which |
| 343 | * additionally provides the services of inserting the proper |
| 344 | * pauses and status polling, where needed. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 345 | * |
| 346 | * LOCKING: |
| 347 | * caller. |
| 348 | */ |
Tejun Heo | c7a8209 | 2010-05-10 21:41:29 +0200 | [diff] [blame] | 349 | static void ata_dev_select(struct ata_port *ap, unsigned int device, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 350 | unsigned int wait, unsigned int can_sleep) |
| 351 | { |
| 352 | if (ata_msg_probe(ap)) |
| 353 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
| 354 | "device %u, wait %u\n", device, wait); |
| 355 | |
| 356 | if (wait) |
| 357 | ata_wait_idle(ap); |
| 358 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 359 | ap->ops->sff_dev_select(ap, device); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 360 | |
| 361 | if (wait) { |
| 362 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
| 363 | msleep(150); |
| 364 | ata_wait_idle(ap); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 369 | * ata_sff_irq_on - Enable interrupts on a port. |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 370 | * @ap: Port on which interrupts are enabled. |
| 371 | * |
| 372 | * Enable interrupts on a legacy IDE device using MMIO or PIO, |
| 373 | * wait for idle, clear any pending interrupts. |
| 374 | * |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 375 | * Note: may NOT be used as the sff_irq_on() entry in |
| 376 | * ata_port_operations. |
| 377 | * |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 378 | * LOCKING: |
| 379 | * Inherited from caller. |
| 380 | */ |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 381 | void ata_sff_irq_on(struct ata_port *ap) |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 382 | { |
| 383 | struct ata_ioports *ioaddr = &ap->ioaddr; |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 384 | |
| 385 | if (ap->ops->sff_irq_on) { |
| 386 | ap->ops->sff_irq_on(ap); |
| 387 | return; |
| 388 | } |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 389 | |
| 390 | ap->ctl &= ~ATA_NIEN; |
| 391 | ap->last_ctl = ap->ctl; |
| 392 | |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 393 | if (ap->ops->sff_set_devctl || ioaddr->ctl_addr) |
| 394 | ata_sff_set_devctl(ap, ap->ctl); |
| 395 | ata_wait_idle(ap); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 396 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 397 | if (ap->ops->sff_irq_clear) |
| 398 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 399 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 400 | EXPORT_SYMBOL_GPL(ata_sff_irq_on); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 401 | |
| 402 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 403 | * ata_sff_tf_load - send taskfile registers to host controller |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 404 | * @ap: Port to which output is sent |
| 405 | * @tf: ATA taskfile register set |
| 406 | * |
| 407 | * Outputs ATA taskfile to standard ATA host controller. |
| 408 | * |
| 409 | * LOCKING: |
| 410 | * Inherited from caller. |
| 411 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 412 | void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 413 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 414 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 415 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 416 | |
| 417 | if (tf->ctl != ap->last_ctl) { |
Tejun Heo | f659f0e4 | 2008-03-06 13:12:54 +0900 | [diff] [blame] | 418 | if (ioaddr->ctl_addr) |
| 419 | iowrite8(tf->ctl, ioaddr->ctl_addr); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 420 | ap->last_ctl = tf->ctl; |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 424 | WARN_ON_ONCE(!ioaddr->ctl_addr); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 425 | iowrite8(tf->hob_feature, ioaddr->feature_addr); |
| 426 | iowrite8(tf->hob_nsect, ioaddr->nsect_addr); |
| 427 | iowrite8(tf->hob_lbal, ioaddr->lbal_addr); |
| 428 | iowrite8(tf->hob_lbam, ioaddr->lbam_addr); |
| 429 | iowrite8(tf->hob_lbah, ioaddr->lbah_addr); |
| 430 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 431 | tf->hob_feature, |
| 432 | tf->hob_nsect, |
| 433 | tf->hob_lbal, |
| 434 | tf->hob_lbam, |
| 435 | tf->hob_lbah); |
| 436 | } |
| 437 | |
| 438 | if (is_addr) { |
| 439 | iowrite8(tf->feature, ioaddr->feature_addr); |
| 440 | iowrite8(tf->nsect, ioaddr->nsect_addr); |
| 441 | iowrite8(tf->lbal, ioaddr->lbal_addr); |
| 442 | iowrite8(tf->lbam, ioaddr->lbam_addr); |
| 443 | iowrite8(tf->lbah, ioaddr->lbah_addr); |
| 444 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 445 | tf->feature, |
| 446 | tf->nsect, |
| 447 | tf->lbal, |
| 448 | tf->lbam, |
| 449 | tf->lbah); |
| 450 | } |
| 451 | |
| 452 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 453 | iowrite8(tf->device, ioaddr->device_addr); |
| 454 | VPRINTK("device 0x%X\n", tf->device); |
| 455 | } |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 456 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 457 | EXPORT_SYMBOL_GPL(ata_sff_tf_load); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 458 | |
| 459 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 460 | * ata_sff_tf_read - input device's ATA taskfile shadow registers |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 461 | * @ap: Port from which input is read |
| 462 | * @tf: ATA taskfile register set for storing input |
| 463 | * |
| 464 | * Reads ATA taskfile registers for currently-selected device |
Alan Cox | 76548ed | 2007-11-19 14:34:56 +0000 | [diff] [blame] | 465 | * into @tf. Assumes the device has a fully SFF compliant task file |
| 466 | * layout and behaviour. If you device does not (eg has a different |
| 467 | * status method) then you will need to provide a replacement tf_read |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 468 | * |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 469 | * LOCKING: |
| 470 | * Inherited from caller. |
| 471 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 472 | void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 473 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 474 | struct ata_ioports *ioaddr = &ap->ioaddr; |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 475 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 476 | tf->command = ata_sff_check_status(ap); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 477 | tf->feature = ioread8(ioaddr->error_addr); |
| 478 | tf->nsect = ioread8(ioaddr->nsect_addr); |
| 479 | tf->lbal = ioread8(ioaddr->lbal_addr); |
| 480 | tf->lbam = ioread8(ioaddr->lbam_addr); |
| 481 | tf->lbah = ioread8(ioaddr->lbah_addr); |
| 482 | tf->device = ioread8(ioaddr->device_addr); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 483 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 484 | if (tf->flags & ATA_TFLAG_LBA48) { |
Tejun Heo | f659f0e4 | 2008-03-06 13:12:54 +0900 | [diff] [blame] | 485 | if (likely(ioaddr->ctl_addr)) { |
| 486 | iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr); |
| 487 | tf->hob_feature = ioread8(ioaddr->error_addr); |
| 488 | tf->hob_nsect = ioread8(ioaddr->nsect_addr); |
| 489 | tf->hob_lbal = ioread8(ioaddr->lbal_addr); |
| 490 | tf->hob_lbam = ioread8(ioaddr->lbam_addr); |
| 491 | tf->hob_lbah = ioread8(ioaddr->lbah_addr); |
| 492 | iowrite8(tf->ctl, ioaddr->ctl_addr); |
| 493 | ap->last_ctl = tf->ctl; |
| 494 | } else |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 495 | WARN_ON_ONCE(1); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 496 | } |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 497 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 498 | EXPORT_SYMBOL_GPL(ata_sff_tf_read); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 499 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 500 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 501 | * ata_sff_exec_command - issue ATA command to host controller |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 502 | * @ap: port to which command is being issued |
| 503 | * @tf: ATA taskfile register set |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 504 | * |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 505 | * Issues ATA command, with proper synchronization with interrupt |
| 506 | * handler / other threads. |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 507 | * |
| 508 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 509 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 510 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 511 | void ata_sff_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 512 | { |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 513 | DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 514 | |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 515 | iowrite8(tf->command, ap->ioaddr.command_addr); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 516 | ata_sff_pause(ap); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 517 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 518 | EXPORT_SYMBOL_GPL(ata_sff_exec_command); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 519 | |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 520 | /** |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 521 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 522 | * @ap: port to which command is being issued |
| 523 | * @tf: ATA taskfile register set |
| 524 | * |
| 525 | * Issues ATA taskfile register set to ATA host controller, |
| 526 | * with proper synchronization with interrupt handler and |
| 527 | * other threads. |
| 528 | * |
| 529 | * LOCKING: |
| 530 | * spin_lock_irqsave(host lock) |
| 531 | */ |
| 532 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 533 | const struct ata_taskfile *tf) |
| 534 | { |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 535 | ap->ops->sff_tf_load(ap, tf); |
| 536 | ap->ops->sff_exec_command(ap, tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 540 | * ata_sff_data_xfer - Transfer data by PIO |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 541 | * @dev: device to target |
| 542 | * @buf: data buffer |
| 543 | * @buflen: buffer length |
| 544 | * @rw: read/write |
| 545 | * |
| 546 | * Transfer data from/to the device data register by PIO. |
| 547 | * |
| 548 | * LOCKING: |
| 549 | * Inherited from caller. |
| 550 | * |
| 551 | * RETURNS: |
| 552 | * Bytes consumed. |
| 553 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 554 | unsigned int ata_sff_data_xfer(struct ata_device *dev, unsigned char *buf, |
| 555 | unsigned int buflen, int rw) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 556 | { |
| 557 | struct ata_port *ap = dev->link->ap; |
| 558 | void __iomem *data_addr = ap->ioaddr.data_addr; |
| 559 | unsigned int words = buflen >> 1; |
| 560 | |
| 561 | /* Transfer multiple of 2 bytes */ |
| 562 | if (rw == READ) |
| 563 | ioread16_rep(data_addr, buf, words); |
| 564 | else |
| 565 | iowrite16_rep(data_addr, buf, words); |
| 566 | |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 567 | /* Transfer trailing byte, if any. */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 568 | if (unlikely(buflen & 0x01)) { |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 569 | unsigned char pad[2]; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 570 | |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 571 | /* Point buf to the tail of buffer */ |
| 572 | buf += buflen - 1; |
| 573 | |
| 574 | /* |
| 575 | * Use io*16_rep() accessors here as well to avoid pointlessly |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 576 | * swapping bytes to and from on the big endian machines... |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 577 | */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 578 | if (rw == READ) { |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 579 | ioread16_rep(data_addr, pad, 1); |
| 580 | *buf = pad[0]; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 581 | } else { |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 582 | pad[0] = *buf; |
| 583 | iowrite16_rep(data_addr, pad, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 584 | } |
| 585 | words++; |
| 586 | } |
| 587 | |
| 588 | return words << 1; |
| 589 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 590 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 591 | |
| 592 | /** |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 593 | * ata_sff_data_xfer32 - Transfer data by PIO |
| 594 | * @dev: device to target |
| 595 | * @buf: data buffer |
| 596 | * @buflen: buffer length |
| 597 | * @rw: read/write |
| 598 | * |
| 599 | * Transfer data from/to the device data register by PIO using 32bit |
| 600 | * I/O operations. |
| 601 | * |
| 602 | * LOCKING: |
| 603 | * Inherited from caller. |
| 604 | * |
| 605 | * RETURNS: |
| 606 | * Bytes consumed. |
| 607 | */ |
| 608 | |
| 609 | unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf, |
| 610 | unsigned int buflen, int rw) |
| 611 | { |
| 612 | struct ata_port *ap = dev->link->ap; |
| 613 | void __iomem *data_addr = ap->ioaddr.data_addr; |
| 614 | unsigned int words = buflen >> 2; |
| 615 | int slop = buflen & 3; |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 616 | |
Alan Cox | e3cf95d | 2009-04-09 17:31:17 +0100 | [diff] [blame] | 617 | if (!(ap->pflags & ATA_PFLAG_PIO32)) |
| 618 | return ata_sff_data_xfer(dev, buf, buflen, rw); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 619 | |
| 620 | /* Transfer multiple of 4 bytes */ |
| 621 | if (rw == READ) |
| 622 | ioread32_rep(data_addr, buf, words); |
| 623 | else |
| 624 | iowrite32_rep(data_addr, buf, words); |
| 625 | |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 626 | /* Transfer trailing bytes, if any */ |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 627 | if (unlikely(slop)) { |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 628 | unsigned char pad[4]; |
| 629 | |
| 630 | /* Point buf to the tail of buffer */ |
| 631 | buf += buflen - slop; |
| 632 | |
| 633 | /* |
| 634 | * Use io*_rep() accessors here as well to avoid pointlessly |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 635 | * swapping bytes to and from on the big endian machines... |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 636 | */ |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 637 | if (rw == READ) { |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 638 | if (slop < 3) |
| 639 | ioread16_rep(data_addr, pad, 1); |
| 640 | else |
| 641 | ioread32_rep(data_addr, pad, 1); |
| 642 | memcpy(buf, pad, slop); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 643 | } else { |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 644 | memcpy(pad, buf, slop); |
| 645 | if (slop < 3) |
| 646 | iowrite16_rep(data_addr, pad, 1); |
| 647 | else |
| 648 | iowrite32_rep(data_addr, pad, 1); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 649 | } |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 650 | } |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 651 | return (buflen + 1) & ~1; |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 652 | } |
| 653 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer32); |
| 654 | |
| 655 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 656 | * ata_sff_data_xfer_noirq - Transfer data by PIO |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 657 | * @dev: device to target |
| 658 | * @buf: data buffer |
| 659 | * @buflen: buffer length |
| 660 | * @rw: read/write |
| 661 | * |
| 662 | * Transfer data from/to the device data register by PIO. Do the |
| 663 | * transfer with interrupts disabled. |
| 664 | * |
| 665 | * LOCKING: |
| 666 | * Inherited from caller. |
| 667 | * |
| 668 | * RETURNS: |
| 669 | * Bytes consumed. |
| 670 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 671 | unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
| 672 | unsigned int buflen, int rw) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 673 | { |
| 674 | unsigned long flags; |
| 675 | unsigned int consumed; |
| 676 | |
| 677 | local_irq_save(flags); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 678 | consumed = ata_sff_data_xfer(dev, buf, buflen, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 679 | local_irq_restore(flags); |
| 680 | |
| 681 | return consumed; |
| 682 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 683 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer_noirq); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 684 | |
| 685 | /** |
| 686 | * ata_pio_sector - Transfer a sector of data. |
| 687 | * @qc: Command on going |
| 688 | * |
| 689 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
| 690 | * |
| 691 | * LOCKING: |
| 692 | * Inherited from caller. |
| 693 | */ |
| 694 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 695 | { |
| 696 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 697 | struct ata_port *ap = qc->ap; |
| 698 | struct page *page; |
| 699 | unsigned int offset; |
| 700 | unsigned char *buf; |
| 701 | |
| 702 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
| 703 | ap->hsm_task_state = HSM_ST_LAST; |
| 704 | |
| 705 | page = sg_page(qc->cursg); |
| 706 | offset = qc->cursg->offset + qc->cursg_ofs; |
| 707 | |
| 708 | /* get the current page and offset */ |
| 709 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 710 | offset %= PAGE_SIZE; |
| 711 | |
| 712 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 713 | |
| 714 | if (PageHighMem(page)) { |
| 715 | unsigned long flags; |
| 716 | |
| 717 | /* FIXME: use a bounce buffer */ |
| 718 | local_irq_save(flags); |
| 719 | buf = kmap_atomic(page, KM_IRQ0); |
| 720 | |
| 721 | /* do the actual data transfer */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 722 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
| 723 | do_write); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 724 | |
| 725 | kunmap_atomic(buf, KM_IRQ0); |
| 726 | local_irq_restore(flags); |
| 727 | } else { |
| 728 | buf = page_address(page); |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 729 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
| 730 | do_write); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 731 | } |
| 732 | |
Sebastian Andrzej Siewior | 3842e83 | 2010-03-21 22:52:23 +0100 | [diff] [blame] | 733 | if (!do_write && !PageSlab(page)) |
Catalin Marinas | 2d68b7f | 2010-02-04 01:04:50 -0500 | [diff] [blame] | 734 | flush_dcache_page(page); |
| 735 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 736 | qc->curbytes += qc->sect_size; |
| 737 | qc->cursg_ofs += qc->sect_size; |
| 738 | |
| 739 | if (qc->cursg_ofs == qc->cursg->length) { |
| 740 | qc->cursg = sg_next(qc->cursg); |
| 741 | qc->cursg_ofs = 0; |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | /** |
| 746 | * ata_pio_sectors - Transfer one or many sectors. |
| 747 | * @qc: Command on going |
| 748 | * |
| 749 | * Transfer one or many sectors of data from/to the |
| 750 | * ATA device for the DRQ request. |
| 751 | * |
| 752 | * LOCKING: |
| 753 | * Inherited from caller. |
| 754 | */ |
| 755 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 756 | { |
| 757 | if (is_multi_taskfile(&qc->tf)) { |
| 758 | /* READ/WRITE MULTIPLE */ |
| 759 | unsigned int nsect; |
| 760 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 761 | WARN_ON_ONCE(qc->dev->multi_count == 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 762 | |
| 763 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
| 764 | qc->dev->multi_count); |
| 765 | while (nsect--) |
| 766 | ata_pio_sector(qc); |
| 767 | } else |
| 768 | ata_pio_sector(qc); |
| 769 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 770 | ata_sff_sync(qc->ap); /* flush */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | /** |
| 774 | * atapi_send_cdb - Write CDB bytes to hardware |
| 775 | * @ap: Port to which ATAPI device is attached. |
| 776 | * @qc: Taskfile currently active |
| 777 | * |
| 778 | * When device has indicated its readiness to accept |
| 779 | * a CDB, this function is called. Send the CDB. |
| 780 | * |
| 781 | * LOCKING: |
| 782 | * caller. |
| 783 | */ |
| 784 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 785 | { |
| 786 | /* send SCSI cdb */ |
| 787 | DPRINTK("send cdb\n"); |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 788 | WARN_ON_ONCE(qc->dev->cdb_len < 12); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 789 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 790 | ap->ops->sff_data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 791 | ata_sff_sync(ap); |
| 792 | /* FIXME: If the CDB is for DMA do we need to do the transition delay |
| 793 | or is bmdma_start guaranteed to do it ? */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 794 | switch (qc->tf.protocol) { |
| 795 | case ATAPI_PROT_PIO: |
| 796 | ap->hsm_task_state = HSM_ST; |
| 797 | break; |
| 798 | case ATAPI_PROT_NODATA: |
| 799 | ap->hsm_task_state = HSM_ST_LAST; |
| 800 | break; |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 801 | #ifdef CONFIG_ATA_BMDMA |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 802 | case ATAPI_PROT_DMA: |
| 803 | ap->hsm_task_state = HSM_ST_LAST; |
| 804 | /* initiate bmdma */ |
| 805 | ap->ops->bmdma_start(qc); |
| 806 | break; |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 807 | #endif /* CONFIG_ATA_BMDMA */ |
| 808 | default: |
| 809 | BUG(); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 810 | } |
| 811 | } |
| 812 | |
| 813 | /** |
| 814 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 815 | * @qc: Command on going |
| 816 | * @bytes: number of bytes |
| 817 | * |
| 818 | * Transfer Transfer data from/to the ATAPI device. |
| 819 | * |
| 820 | * LOCKING: |
| 821 | * Inherited from caller. |
| 822 | * |
| 823 | */ |
| 824 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 825 | { |
| 826 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; |
| 827 | struct ata_port *ap = qc->ap; |
| 828 | struct ata_device *dev = qc->dev; |
| 829 | struct ata_eh_info *ehi = &dev->link->eh_info; |
| 830 | struct scatterlist *sg; |
| 831 | struct page *page; |
| 832 | unsigned char *buf; |
| 833 | unsigned int offset, count, consumed; |
| 834 | |
| 835 | next_sg: |
| 836 | sg = qc->cursg; |
| 837 | if (unlikely(!sg)) { |
| 838 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " |
| 839 | "buf=%u cur=%u bytes=%u", |
| 840 | qc->nbytes, qc->curbytes, bytes); |
| 841 | return -1; |
| 842 | } |
| 843 | |
| 844 | page = sg_page(sg); |
| 845 | offset = sg->offset + qc->cursg_ofs; |
| 846 | |
| 847 | /* get the current page and offset */ |
| 848 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 849 | offset %= PAGE_SIZE; |
| 850 | |
| 851 | /* don't overrun current sg */ |
| 852 | count = min(sg->length - qc->cursg_ofs, bytes); |
| 853 | |
| 854 | /* don't cross page boundaries */ |
| 855 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 856 | |
| 857 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 858 | |
| 859 | if (PageHighMem(page)) { |
| 860 | unsigned long flags; |
| 861 | |
| 862 | /* FIXME: use bounce buffer */ |
| 863 | local_irq_save(flags); |
| 864 | buf = kmap_atomic(page, KM_IRQ0); |
| 865 | |
| 866 | /* do the actual data transfer */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 867 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
| 868 | count, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 869 | |
| 870 | kunmap_atomic(buf, KM_IRQ0); |
| 871 | local_irq_restore(flags); |
| 872 | } else { |
| 873 | buf = page_address(page); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 874 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
| 875 | count, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | bytes -= min(bytes, consumed); |
| 879 | qc->curbytes += count; |
| 880 | qc->cursg_ofs += count; |
| 881 | |
| 882 | if (qc->cursg_ofs == sg->length) { |
| 883 | qc->cursg = sg_next(qc->cursg); |
| 884 | qc->cursg_ofs = 0; |
| 885 | } |
| 886 | |
Christian Borntraeger | a0f79f7 | 2009-01-13 10:38:36 +0100 | [diff] [blame] | 887 | /* |
| 888 | * There used to be a WARN_ON_ONCE(qc->cursg && count != consumed); |
| 889 | * Unfortunately __atapi_pio_bytes doesn't know enough to do the WARN |
| 890 | * check correctly as it doesn't know if it is the last request being |
| 891 | * made. Somebody should implement a proper sanity check. |
| 892 | */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 893 | if (bytes) |
| 894 | goto next_sg; |
| 895 | return 0; |
| 896 | } |
| 897 | |
| 898 | /** |
| 899 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 900 | * @qc: Command on going |
| 901 | * |
| 902 | * Transfer Transfer data from/to the ATAPI device. |
| 903 | * |
| 904 | * LOCKING: |
| 905 | * Inherited from caller. |
| 906 | */ |
| 907 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 908 | { |
| 909 | struct ata_port *ap = qc->ap; |
| 910 | struct ata_device *dev = qc->dev; |
| 911 | struct ata_eh_info *ehi = &dev->link->eh_info; |
| 912 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 913 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 914 | |
| 915 | /* Abuse qc->result_tf for temp storage of intermediate TF |
| 916 | * here to save some kernel stack usage. |
| 917 | * For normal completion, qc->result_tf is not relevant. For |
| 918 | * error, qc->result_tf is later overwritten by ata_qc_complete(). |
| 919 | * So, the correctness of qc->result_tf is not affected. |
| 920 | */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 921 | ap->ops->sff_tf_read(ap, &qc->result_tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 922 | ireason = qc->result_tf.nsect; |
| 923 | bc_lo = qc->result_tf.lbam; |
| 924 | bc_hi = qc->result_tf.lbah; |
| 925 | bytes = (bc_hi << 8) | bc_lo; |
| 926 | |
| 927 | /* shall be cleared to zero, indicating xfer of data */ |
| 928 | if (unlikely(ireason & (1 << 0))) |
| 929 | goto atapi_check; |
| 930 | |
| 931 | /* make sure transfer direction matches expected */ |
| 932 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 933 | if (unlikely(do_write != i_write)) |
| 934 | goto atapi_check; |
| 935 | |
| 936 | if (unlikely(!bytes)) |
| 937 | goto atapi_check; |
| 938 | |
| 939 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
| 940 | |
| 941 | if (unlikely(__atapi_pio_bytes(qc, bytes))) |
| 942 | goto err_out; |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 943 | ata_sff_sync(ap); /* flush */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 944 | |
| 945 | return; |
| 946 | |
| 947 | atapi_check: |
| 948 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", |
| 949 | ireason, bytes); |
| 950 | err_out: |
| 951 | qc->err_mask |= AC_ERR_HSM; |
| 952 | ap->hsm_task_state = HSM_ST_ERR; |
| 953 | } |
| 954 | |
| 955 | /** |
| 956 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
| 957 | * @ap: the target ata_port |
| 958 | * @qc: qc on going |
| 959 | * |
| 960 | * RETURNS: |
| 961 | * 1 if ok in workqueue, 0 otherwise. |
| 962 | */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 963 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, |
| 964 | struct ata_queued_cmd *qc) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 965 | { |
| 966 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 967 | return 1; |
| 968 | |
| 969 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
| 970 | if (qc->tf.protocol == ATA_PROT_PIO && |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 971 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 972 | return 1; |
| 973 | |
| 974 | if (ata_is_atapi(qc->tf.protocol) && |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 975 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 976 | return 1; |
| 977 | } |
| 978 | |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | /** |
| 983 | * ata_hsm_qc_complete - finish a qc running on standard HSM |
| 984 | * @qc: Command to complete |
| 985 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 986 | * |
| 987 | * Finish @qc which is running on standard HSM. |
| 988 | * |
| 989 | * LOCKING: |
| 990 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
| 991 | * Otherwise, none on entry and grabs host lock. |
| 992 | */ |
| 993 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) |
| 994 | { |
| 995 | struct ata_port *ap = qc->ap; |
| 996 | unsigned long flags; |
| 997 | |
| 998 | if (ap->ops->error_handler) { |
| 999 | if (in_wq) { |
| 1000 | spin_lock_irqsave(ap->lock, flags); |
| 1001 | |
| 1002 | /* EH might have kicked in while host lock is |
| 1003 | * released. |
| 1004 | */ |
| 1005 | qc = ata_qc_from_tag(ap, qc->tag); |
| 1006 | if (qc) { |
| 1007 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1008 | ata_sff_irq_on(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1009 | ata_qc_complete(qc); |
| 1010 | } else |
| 1011 | ata_port_freeze(ap); |
| 1012 | } |
| 1013 | |
| 1014 | spin_unlock_irqrestore(ap->lock, flags); |
| 1015 | } else { |
| 1016 | if (likely(!(qc->err_mask & AC_ERR_HSM))) |
| 1017 | ata_qc_complete(qc); |
| 1018 | else |
| 1019 | ata_port_freeze(ap); |
| 1020 | } |
| 1021 | } else { |
| 1022 | if (in_wq) { |
| 1023 | spin_lock_irqsave(ap->lock, flags); |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1024 | ata_sff_irq_on(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1025 | ata_qc_complete(qc); |
| 1026 | spin_unlock_irqrestore(ap->lock, flags); |
| 1027 | } else |
| 1028 | ata_qc_complete(qc); |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1033 | * ata_sff_hsm_move - move the HSM to the next state. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1034 | * @ap: the target ata_port |
| 1035 | * @qc: qc on going |
| 1036 | * @status: current device status |
| 1037 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 1038 | * |
| 1039 | * RETURNS: |
| 1040 | * 1 when poll next status needed, 0 otherwise. |
| 1041 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1042 | int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 1043 | u8 status, int in_wq) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1044 | { |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1045 | struct ata_eh_info *ehi = &ap->link.eh_info; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1046 | unsigned long flags = 0; |
| 1047 | int poll_next; |
| 1048 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1049 | WARN_ON_ONCE((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1050 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1051 | /* Make sure ata_sff_qc_issue() does not throw things |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1052 | * like DMA polling into the workqueue. Notice that |
| 1053 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). |
| 1054 | */ |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1055 | WARN_ON_ONCE(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1056 | |
| 1057 | fsm_start: |
| 1058 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
| 1059 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
| 1060 | |
| 1061 | switch (ap->hsm_task_state) { |
| 1062 | case HSM_ST_FIRST: |
| 1063 | /* Send first data block or PACKET CDB */ |
| 1064 | |
| 1065 | /* If polling, we will stay in the work queue after |
| 1066 | * sending the data. Otherwise, interrupt handler |
| 1067 | * takes over after sending the data. |
| 1068 | */ |
| 1069 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 1070 | |
| 1071 | /* check device status */ |
| 1072 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 1073 | /* handle BSY=0, DRQ=0 as error */ |
| 1074 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 1075 | /* device stops HSM for abort/error */ |
| 1076 | qc->err_mask |= AC_ERR_DEV; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1077 | else { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1078 | /* HSM violation. Let EH handle this */ |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1079 | ata_ehi_push_desc(ehi, |
| 1080 | "ST_FIRST: !(DRQ|ERR|DF)"); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1081 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1082 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1083 | |
| 1084 | ap->hsm_task_state = HSM_ST_ERR; |
| 1085 | goto fsm_start; |
| 1086 | } |
| 1087 | |
| 1088 | /* Device should not ask for data transfer (DRQ=1) |
| 1089 | * when it finds something wrong. |
| 1090 | * We ignore DRQ here and stop the HSM by |
| 1091 | * changing hsm_task_state to HSM_ST_ERR and |
| 1092 | * let the EH abort the command or reset the device. |
| 1093 | */ |
| 1094 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
| 1095 | /* Some ATAPI tape drives forget to clear the ERR bit |
| 1096 | * when doing the next command (mostly request sense). |
| 1097 | * We ignore ERR here to workaround and proceed sending |
| 1098 | * the CDB. |
| 1099 | */ |
| 1100 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1101 | ata_ehi_push_desc(ehi, "ST_FIRST: " |
| 1102 | "DRQ=1 with device error, " |
| 1103 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1104 | qc->err_mask |= AC_ERR_HSM; |
| 1105 | ap->hsm_task_state = HSM_ST_ERR; |
| 1106 | goto fsm_start; |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 1111 | * During the state transition, interrupt handler shouldn't |
| 1112 | * be invoked before the data transfer is complete and |
| 1113 | * hsm_task_state is changed. Hence, the following locking. |
| 1114 | */ |
| 1115 | if (in_wq) |
| 1116 | spin_lock_irqsave(ap->lock, flags); |
| 1117 | |
| 1118 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 1119 | /* PIO data out protocol. |
| 1120 | * send first data block. |
| 1121 | */ |
| 1122 | |
| 1123 | /* ata_pio_sectors() might change the state |
| 1124 | * to HSM_ST_LAST. so, the state is changed here |
| 1125 | * before ata_pio_sectors(). |
| 1126 | */ |
| 1127 | ap->hsm_task_state = HSM_ST; |
| 1128 | ata_pio_sectors(qc); |
| 1129 | } else |
| 1130 | /* send CDB */ |
| 1131 | atapi_send_cdb(ap, qc); |
| 1132 | |
| 1133 | if (in_wq) |
| 1134 | spin_unlock_irqrestore(ap->lock, flags); |
| 1135 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1136 | /* if polling, ata_sff_pio_task() handles the rest. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1137 | * otherwise, interrupt handler takes over from here. |
| 1138 | */ |
| 1139 | break; |
| 1140 | |
| 1141 | case HSM_ST: |
| 1142 | /* complete command or read/write the data register */ |
| 1143 | if (qc->tf.protocol == ATAPI_PROT_PIO) { |
| 1144 | /* ATAPI PIO protocol */ |
| 1145 | if ((status & ATA_DRQ) == 0) { |
| 1146 | /* No more data to transfer or device error. |
| 1147 | * Device error will be tagged in HSM_ST_LAST. |
| 1148 | */ |
| 1149 | ap->hsm_task_state = HSM_ST_LAST; |
| 1150 | goto fsm_start; |
| 1151 | } |
| 1152 | |
| 1153 | /* Device should not ask for data transfer (DRQ=1) |
| 1154 | * when it finds something wrong. |
| 1155 | * We ignore DRQ here and stop the HSM by |
| 1156 | * changing hsm_task_state to HSM_ST_ERR and |
| 1157 | * let the EH abort the command or reset the device. |
| 1158 | */ |
| 1159 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1160 | ata_ehi_push_desc(ehi, "ST-ATAPI: " |
| 1161 | "DRQ=1 with device error, " |
| 1162 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1163 | qc->err_mask |= AC_ERR_HSM; |
| 1164 | ap->hsm_task_state = HSM_ST_ERR; |
| 1165 | goto fsm_start; |
| 1166 | } |
| 1167 | |
| 1168 | atapi_pio_bytes(qc); |
| 1169 | |
| 1170 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 1171 | /* bad ireason reported by device */ |
| 1172 | goto fsm_start; |
| 1173 | |
| 1174 | } else { |
| 1175 | /* ATA PIO protocol */ |
| 1176 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 1177 | /* handle BSY=0, DRQ=0 as error */ |
Tejun Heo | 6a6b97d | 2008-11-13 10:04:46 +0900 | [diff] [blame] | 1178 | if (likely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1179 | /* device stops HSM for abort/error */ |
| 1180 | qc->err_mask |= AC_ERR_DEV; |
Tejun Heo | 6a6b97d | 2008-11-13 10:04:46 +0900 | [diff] [blame] | 1181 | |
| 1182 | /* If diagnostic failed and this is |
| 1183 | * IDENTIFY, it's likely a phantom |
| 1184 | * device. Mark hint. |
| 1185 | */ |
| 1186 | if (qc->dev->horkage & |
| 1187 | ATA_HORKAGE_DIAGNOSTIC) |
| 1188 | qc->err_mask |= |
| 1189 | AC_ERR_NODEV_HINT; |
| 1190 | } else { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1191 | /* HSM violation. Let EH handle this. |
| 1192 | * Phantom devices also trigger this |
| 1193 | * condition. Mark hint. |
| 1194 | */ |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1195 | ata_ehi_push_desc(ehi, "ST-ATA: " |
Tejun Heo | 80ee6f5 | 2009-01-23 14:12:59 +0900 | [diff] [blame] | 1196 | "DRQ=0 without device error, " |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1197 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1198 | qc->err_mask |= AC_ERR_HSM | |
| 1199 | AC_ERR_NODEV_HINT; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1200 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1201 | |
| 1202 | ap->hsm_task_state = HSM_ST_ERR; |
| 1203 | goto fsm_start; |
| 1204 | } |
| 1205 | |
| 1206 | /* For PIO reads, some devices may ask for |
| 1207 | * data transfer (DRQ=1) alone with ERR=1. |
| 1208 | * We respect DRQ here and transfer one |
| 1209 | * block of junk data before changing the |
| 1210 | * hsm_task_state to HSM_ST_ERR. |
| 1211 | * |
| 1212 | * For PIO writes, ERR=1 DRQ=1 doesn't make |
| 1213 | * sense since the data block has been |
| 1214 | * transferred to the device. |
| 1215 | */ |
| 1216 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
| 1217 | /* data might be corrputed */ |
| 1218 | qc->err_mask |= AC_ERR_DEV; |
| 1219 | |
| 1220 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { |
| 1221 | ata_pio_sectors(qc); |
| 1222 | status = ata_wait_idle(ap); |
| 1223 | } |
| 1224 | |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1225 | if (status & (ATA_BUSY | ATA_DRQ)) { |
| 1226 | ata_ehi_push_desc(ehi, "ST-ATA: " |
| 1227 | "BUSY|DRQ persists on ERR|DF, " |
| 1228 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1229 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1230 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1231 | |
Tejun Heo | b919930 | 2009-01-25 10:26:00 +0900 | [diff] [blame] | 1232 | /* There are oddball controllers with |
| 1233 | * status register stuck at 0x7f and |
| 1234 | * lbal/m/h at zero which makes it |
| 1235 | * pass all other presence detection |
| 1236 | * mechanisms we have. Set NODEV_HINT |
| 1237 | * for it. Kernel bz#7241. |
| 1238 | */ |
| 1239 | if (status == 0x7f) |
| 1240 | qc->err_mask |= AC_ERR_NODEV_HINT; |
| 1241 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1242 | /* ata_pio_sectors() might change the |
| 1243 | * state to HSM_ST_LAST. so, the state |
| 1244 | * is changed after ata_pio_sectors(). |
| 1245 | */ |
| 1246 | ap->hsm_task_state = HSM_ST_ERR; |
| 1247 | goto fsm_start; |
| 1248 | } |
| 1249 | |
| 1250 | ata_pio_sectors(qc); |
| 1251 | |
| 1252 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 1253 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 1254 | /* all data read */ |
| 1255 | status = ata_wait_idle(ap); |
| 1256 | goto fsm_start; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | poll_next = 1; |
| 1261 | break; |
| 1262 | |
| 1263 | case HSM_ST_LAST: |
| 1264 | if (unlikely(!ata_ok(status))) { |
| 1265 | qc->err_mask |= __ac_err_mask(status); |
| 1266 | ap->hsm_task_state = HSM_ST_ERR; |
| 1267 | goto fsm_start; |
| 1268 | } |
| 1269 | |
| 1270 | /* no more data to transfer */ |
| 1271 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
| 1272 | ap->print_id, qc->dev->devno, status); |
| 1273 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1274 | WARN_ON_ONCE(qc->err_mask & (AC_ERR_DEV | AC_ERR_HSM)); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1275 | |
| 1276 | ap->hsm_task_state = HSM_ST_IDLE; |
| 1277 | |
| 1278 | /* complete taskfile transaction */ |
| 1279 | ata_hsm_qc_complete(qc, in_wq); |
| 1280 | |
| 1281 | poll_next = 0; |
| 1282 | break; |
| 1283 | |
| 1284 | case HSM_ST_ERR: |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1285 | ap->hsm_task_state = HSM_ST_IDLE; |
| 1286 | |
| 1287 | /* complete taskfile transaction */ |
| 1288 | ata_hsm_qc_complete(qc, in_wq); |
| 1289 | |
| 1290 | poll_next = 0; |
| 1291 | break; |
| 1292 | default: |
| 1293 | poll_next = 0; |
| 1294 | BUG(); |
| 1295 | } |
| 1296 | |
| 1297 | return poll_next; |
| 1298 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1299 | EXPORT_SYMBOL_GPL(ata_sff_hsm_move); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1300 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1301 | void ata_sff_queue_pio_task(struct ata_port *ap, unsigned long delay) |
| 1302 | { |
| 1303 | /* may fail if ata_sff_flush_pio_task() in progress */ |
| 1304 | queue_delayed_work(ata_sff_wq, &ap->sff_pio_task, |
| 1305 | msecs_to_jiffies(delay)); |
| 1306 | } |
| 1307 | EXPORT_SYMBOL_GPL(ata_sff_queue_pio_task); |
| 1308 | |
| 1309 | void ata_sff_flush_pio_task(struct ata_port *ap) |
| 1310 | { |
| 1311 | DPRINTK("ENTER\n"); |
| 1312 | |
| 1313 | cancel_rearming_delayed_work(&ap->sff_pio_task); |
| 1314 | ap->hsm_task_state = HSM_ST_IDLE; |
| 1315 | |
| 1316 | if (ata_msg_ctl(ap)) |
| 1317 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
| 1318 | } |
| 1319 | |
| 1320 | static void ata_sff_pio_task(struct work_struct *work) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1321 | { |
| 1322 | struct ata_port *ap = |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1323 | container_of(work, struct ata_port, sff_pio_task.work); |
| 1324 | struct ata_queued_cmd *qc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1325 | u8 status; |
| 1326 | int poll_next; |
| 1327 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1328 | /* qc can be NULL if timeout occurred */ |
| 1329 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
| 1330 | if (!qc) |
| 1331 | return; |
| 1332 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1333 | fsm_start: |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1334 | WARN_ON_ONCE(ap->hsm_task_state == HSM_ST_IDLE); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1335 | |
| 1336 | /* |
| 1337 | * This is purely heuristic. This is a fast path. |
| 1338 | * Sometimes when we enter, BSY will be cleared in |
| 1339 | * a chk-status or two. If not, the drive is probably seeking |
| 1340 | * or something. Snooze for a couple msecs, then |
| 1341 | * chk-status again. If still busy, queue delayed work. |
| 1342 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1343 | status = ata_sff_busy_wait(ap, ATA_BUSY, 5); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1344 | if (status & ATA_BUSY) { |
| 1345 | msleep(2); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1346 | status = ata_sff_busy_wait(ap, ATA_BUSY, 10); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1347 | if (status & ATA_BUSY) { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1348 | ata_sff_queue_pio_task(ap, ATA_SHORT_PAUSE); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1349 | return; |
| 1350 | } |
| 1351 | } |
| 1352 | |
| 1353 | /* move the HSM */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1354 | poll_next = ata_sff_hsm_move(ap, qc, status, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1355 | |
| 1356 | /* another command or interrupt handler |
| 1357 | * may be running at this point. |
| 1358 | */ |
| 1359 | if (poll_next) |
| 1360 | goto fsm_start; |
| 1361 | } |
| 1362 | |
| 1363 | /** |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1364 | * ata_sff_qc_issue - issue taskfile to a SFF controller |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1365 | * @qc: command to issue to device |
| 1366 | * |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1367 | * This function issues a PIO or NODATA command to a SFF |
| 1368 | * controller. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1369 | * |
| 1370 | * LOCKING: |
| 1371 | * spin_lock_irqsave(host lock) |
| 1372 | * |
| 1373 | * RETURNS: |
| 1374 | * Zero on success, AC_ERR_* mask on failure |
| 1375 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1376 | unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1377 | { |
| 1378 | struct ata_port *ap = qc->ap; |
| 1379 | |
| 1380 | /* Use polling pio if the LLD doesn't handle |
| 1381 | * interrupt driven pio and atapi CDB interrupt. |
| 1382 | */ |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1383 | if (ap->flags & ATA_FLAG_PIO_POLLING) |
| 1384 | qc->tf.flags |= ATA_TFLAG_POLLING; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1385 | |
| 1386 | /* select the device */ |
| 1387 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 1388 | |
| 1389 | /* start the command */ |
| 1390 | switch (qc->tf.protocol) { |
| 1391 | case ATA_PROT_NODATA: |
| 1392 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1393 | ata_qc_set_polling(qc); |
| 1394 | |
| 1395 | ata_tf_to_host(ap, &qc->tf); |
| 1396 | ap->hsm_task_state = HSM_ST_LAST; |
| 1397 | |
| 1398 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1399 | ata_sff_queue_pio_task(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1400 | |
| 1401 | break; |
| 1402 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1403 | case ATA_PROT_PIO: |
| 1404 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1405 | ata_qc_set_polling(qc); |
| 1406 | |
| 1407 | ata_tf_to_host(ap, &qc->tf); |
| 1408 | |
| 1409 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 1410 | /* PIO data out protocol */ |
| 1411 | ap->hsm_task_state = HSM_ST_FIRST; |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1412 | ata_sff_queue_pio_task(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1413 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1414 | /* always send first data block using the |
| 1415 | * ata_sff_pio_task() codepath. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1416 | */ |
| 1417 | } else { |
| 1418 | /* PIO data in protocol */ |
| 1419 | ap->hsm_task_state = HSM_ST; |
| 1420 | |
| 1421 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1422 | ata_sff_queue_pio_task(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1423 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1424 | /* if polling, ata_sff_pio_task() handles the |
| 1425 | * rest. otherwise, interrupt handler takes |
| 1426 | * over from here. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1427 | */ |
| 1428 | } |
| 1429 | |
| 1430 | break; |
| 1431 | |
| 1432 | case ATAPI_PROT_PIO: |
| 1433 | case ATAPI_PROT_NODATA: |
| 1434 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1435 | ata_qc_set_polling(qc); |
| 1436 | |
| 1437 | ata_tf_to_host(ap, &qc->tf); |
| 1438 | |
| 1439 | ap->hsm_task_state = HSM_ST_FIRST; |
| 1440 | |
| 1441 | /* send cdb by polling if no cdb interrupt */ |
| 1442 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 1443 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1444 | ata_sff_queue_pio_task(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1445 | break; |
| 1446 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1447 | default: |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1448 | WARN_ON_ONCE(1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1449 | return AC_ERR_SYSTEM; |
| 1450 | } |
| 1451 | |
| 1452 | return 0; |
| 1453 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1454 | EXPORT_SYMBOL_GPL(ata_sff_qc_issue); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1455 | |
| 1456 | /** |
Tejun Heo | 22183bf | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 1457 | * ata_sff_qc_fill_rtf - fill result TF using ->sff_tf_read |
| 1458 | * @qc: qc to fill result TF for |
| 1459 | * |
| 1460 | * @qc is finished and result TF needs to be filled. Fill it |
| 1461 | * using ->sff_tf_read. |
| 1462 | * |
| 1463 | * LOCKING: |
| 1464 | * spin_lock_irqsave(host lock) |
| 1465 | * |
| 1466 | * RETURNS: |
| 1467 | * true indicating that result TF is successfully filled. |
| 1468 | */ |
| 1469 | bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc) |
| 1470 | { |
| 1471 | qc->ap->ops->sff_tf_read(qc->ap, &qc->result_tf); |
| 1472 | return true; |
| 1473 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1474 | EXPORT_SYMBOL_GPL(ata_sff_qc_fill_rtf); |
Tejun Heo | 22183bf | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 1475 | |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1476 | static unsigned int ata_sff_idle_irq(struct ata_port *ap) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1477 | { |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1478 | ap->stats.idle_irq++; |
| 1479 | |
| 1480 | #ifdef ATA_IRQ_TRAP |
| 1481 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 1482 | ap->ops->sff_check_status(ap); |
| 1483 | if (ap->ops->sff_irq_clear) |
| 1484 | ap->ops->sff_irq_clear(ap); |
| 1485 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
| 1486 | return 1; |
| 1487 | } |
| 1488 | #endif |
| 1489 | return 0; /* irq not handled */ |
| 1490 | } |
| 1491 | |
| 1492 | static unsigned int __ata_sff_port_intr(struct ata_port *ap, |
| 1493 | struct ata_queued_cmd *qc, |
| 1494 | bool hsmv_on_idle) |
| 1495 | { |
| 1496 | u8 status; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1497 | |
| 1498 | VPRINTK("ata%u: protocol %d task_state %d\n", |
| 1499 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
| 1500 | |
| 1501 | /* Check whether we are expecting interrupt in this state */ |
| 1502 | switch (ap->hsm_task_state) { |
| 1503 | case HSM_ST_FIRST: |
| 1504 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 1505 | * at this state when ready to receive CDB. |
| 1506 | */ |
| 1507 | |
| 1508 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 1509 | * The flag was turned on only for atapi devices. No |
| 1510 | * need to check ata_is_atapi(qc->tf.protocol) again. |
| 1511 | */ |
| 1512 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1513 | return ata_sff_idle_irq(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1514 | break; |
| 1515 | case HSM_ST: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1516 | case HSM_ST_LAST: |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1517 | break; |
| 1518 | default: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1519 | return ata_sff_idle_irq(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1520 | } |
| 1521 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 1522 | /* check main status, clearing INTRQ if needed */ |
| 1523 | status = ata_sff_irq_status(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1524 | if (status & ATA_BUSY) { |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1525 | if (hsmv_on_idle) { |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1526 | /* BMDMA engine is already stopped, we're screwed */ |
| 1527 | qc->err_mask |= AC_ERR_HSM; |
| 1528 | ap->hsm_task_state = HSM_ST_ERR; |
| 1529 | } else |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1530 | return ata_sff_idle_irq(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1531 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1532 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 1533 | /* clear irq events */ |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1534 | if (ap->ops->sff_irq_clear) |
| 1535 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1536 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1537 | ata_sff_hsm_move(ap, qc, status, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1538 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1539 | return 1; /* irq handled */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1540 | } |
| 1541 | |
| 1542 | /** |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1543 | * ata_sff_port_intr - Handle SFF port interrupt |
| 1544 | * @ap: Port on which interrupt arrived (possibly...) |
| 1545 | * @qc: Taskfile currently active in engine |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1546 | * |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1547 | * Handle port interrupt for given queued command. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1548 | * |
| 1549 | * LOCKING: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1550 | * spin_lock_irqsave(host lock) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1551 | * |
| 1552 | * RETURNS: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1553 | * One if interrupt was handled, zero if not (shared irq). |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1554 | */ |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1555 | unsigned int ata_sff_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 1556 | { |
| 1557 | return __ata_sff_port_intr(ap, qc, false); |
| 1558 | } |
| 1559 | EXPORT_SYMBOL_GPL(ata_sff_port_intr); |
| 1560 | |
| 1561 | static inline irqreturn_t __ata_sff_interrupt(int irq, void *dev_instance, |
| 1562 | unsigned int (*port_intr)(struct ata_port *, struct ata_queued_cmd *)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1563 | { |
| 1564 | struct ata_host *host = dev_instance; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1565 | bool retried = false; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1566 | unsigned int i; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1567 | unsigned int handled, idle, polling; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1568 | unsigned long flags; |
| 1569 | |
| 1570 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 1571 | spin_lock_irqsave(&host->lock, flags); |
| 1572 | |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1573 | retry: |
| 1574 | handled = idle = polling = 0; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1575 | for (i = 0; i < host->n_ports; i++) { |
Tejun Heo | d88ec2e | 2010-01-19 10:46:32 +0900 | [diff] [blame] | 1576 | struct ata_port *ap = host->ports[i]; |
| 1577 | struct ata_queued_cmd *qc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1578 | |
Tejun Heo | d88ec2e | 2010-01-19 10:46:32 +0900 | [diff] [blame] | 1579 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1580 | if (qc) { |
| 1581 | if (!(qc->tf.flags & ATA_TFLAG_POLLING)) |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1582 | handled |= port_intr(ap, qc); |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1583 | else |
| 1584 | polling |= 1 << i; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1585 | } else |
| 1586 | idle |= 1 << i; |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1587 | } |
| 1588 | |
| 1589 | /* |
| 1590 | * If no port was expecting IRQ but the controller is actually |
| 1591 | * asserting IRQ line, nobody cared will ensue. Check IRQ |
| 1592 | * pending status if available and clear spurious IRQ. |
| 1593 | */ |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1594 | if (!handled && !retried) { |
| 1595 | bool retry = false; |
| 1596 | |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1597 | for (i = 0; i < host->n_ports; i++) { |
| 1598 | struct ata_port *ap = host->ports[i]; |
| 1599 | |
| 1600 | if (polling & (1 << i)) |
| 1601 | continue; |
| 1602 | |
| 1603 | if (!ap->ops->sff_irq_check || |
| 1604 | !ap->ops->sff_irq_check(ap)) |
| 1605 | continue; |
| 1606 | |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1607 | if (idle & (1 << i)) { |
| 1608 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1609 | if (ap->ops->sff_irq_clear) |
| 1610 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1611 | } else { |
| 1612 | /* clear INTRQ and check if BUSY cleared */ |
| 1613 | if (!(ap->ops->sff_check_status(ap) & ATA_BUSY)) |
| 1614 | retry |= true; |
| 1615 | /* |
| 1616 | * With command in flight, we can't do |
| 1617 | * sff_irq_clear() w/o racing with completion. |
| 1618 | */ |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | if (retry) { |
| 1623 | retried = true; |
| 1624 | goto retry; |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1625 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1626 | } |
| 1627 | |
| 1628 | spin_unlock_irqrestore(&host->lock, flags); |
| 1629 | |
| 1630 | return IRQ_RETVAL(handled); |
| 1631 | } |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1632 | |
| 1633 | /** |
| 1634 | * ata_sff_interrupt - Default SFF ATA host interrupt handler |
| 1635 | * @irq: irq line (unused) |
| 1636 | * @dev_instance: pointer to our ata_host information structure |
| 1637 | * |
| 1638 | * Default interrupt handler for PCI IDE devices. Calls |
| 1639 | * ata_sff_port_intr() for each port that is not disabled. |
| 1640 | * |
| 1641 | * LOCKING: |
| 1642 | * Obtains host lock during operation. |
| 1643 | * |
| 1644 | * RETURNS: |
| 1645 | * IRQ_NONE or IRQ_HANDLED. |
| 1646 | */ |
| 1647 | irqreturn_t ata_sff_interrupt(int irq, void *dev_instance) |
| 1648 | { |
| 1649 | return __ata_sff_interrupt(irq, dev_instance, ata_sff_port_intr); |
| 1650 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1651 | EXPORT_SYMBOL_GPL(ata_sff_interrupt); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1652 | |
| 1653 | /** |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1654 | * ata_sff_lost_interrupt - Check for an apparent lost interrupt |
| 1655 | * @ap: port that appears to have timed out |
| 1656 | * |
| 1657 | * Called from the libata error handlers when the core code suspects |
| 1658 | * an interrupt has been lost. If it has complete anything we can and |
| 1659 | * then return. Interface must support altstatus for this faster |
| 1660 | * recovery to occur. |
| 1661 | * |
| 1662 | * Locking: |
| 1663 | * Caller holds host lock |
| 1664 | */ |
| 1665 | |
| 1666 | void ata_sff_lost_interrupt(struct ata_port *ap) |
| 1667 | { |
| 1668 | u8 status; |
| 1669 | struct ata_queued_cmd *qc; |
| 1670 | |
| 1671 | /* Only one outstanding command per SFF channel */ |
| 1672 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 3e4ec34 | 2010-05-10 21:41:30 +0200 | [diff] [blame] | 1673 | /* We cannot lose an interrupt on a non-existent or polled command */ |
| 1674 | if (!qc || qc->tf.flags & ATA_TFLAG_POLLING) |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1675 | return; |
| 1676 | /* See if the controller thinks it is still busy - if so the command |
| 1677 | isn't a lost IRQ but is still in progress */ |
| 1678 | status = ata_sff_altstatus(ap); |
| 1679 | if (status & ATA_BUSY) |
| 1680 | return; |
| 1681 | |
| 1682 | /* There was a command running, we are no longer busy and we have |
| 1683 | no interrupt. */ |
| 1684 | ata_port_printk(ap, KERN_WARNING, "lost interrupt (Status 0x%x)\n", |
| 1685 | status); |
| 1686 | /* Run the host interrupt logic as if the interrupt had not been |
| 1687 | lost */ |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1688 | ata_sff_port_intr(ap, qc); |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1689 | } |
| 1690 | EXPORT_SYMBOL_GPL(ata_sff_lost_interrupt); |
| 1691 | |
| 1692 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1693 | * ata_sff_freeze - Freeze SFF controller port |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1694 | * @ap: port to freeze |
| 1695 | * |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 1696 | * Freeze SFF controller port. |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1697 | * |
| 1698 | * LOCKING: |
| 1699 | * Inherited from caller. |
| 1700 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1701 | void ata_sff_freeze(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1702 | { |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1703 | ap->ctl |= ATA_NIEN; |
| 1704 | ap->last_ctl = ap->ctl; |
| 1705 | |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 1706 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) |
| 1707 | ata_sff_set_devctl(ap, ap->ctl); |
Tejun Heo | 0f0a3ad | 2006-11-17 12:24:22 +0900 | [diff] [blame] | 1708 | |
| 1709 | /* Under certain circumstances, some controllers raise IRQ on |
| 1710 | * ATA_NIEN manipulation. Also, many controllers fail to mask |
| 1711 | * previously pending IRQ on ATA_NIEN assertion. Clear it. |
| 1712 | */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1713 | ap->ops->sff_check_status(ap); |
Tejun Heo | 0f0a3ad | 2006-11-17 12:24:22 +0900 | [diff] [blame] | 1714 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1715 | if (ap->ops->sff_irq_clear) |
| 1716 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1717 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1718 | EXPORT_SYMBOL_GPL(ata_sff_freeze); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1719 | |
| 1720 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1721 | * ata_sff_thaw - Thaw SFF controller port |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1722 | * @ap: port to thaw |
| 1723 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1724 | * Thaw SFF controller port. |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1725 | * |
| 1726 | * LOCKING: |
| 1727 | * Inherited from caller. |
| 1728 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1729 | void ata_sff_thaw(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1730 | { |
| 1731 | /* clear & re-enable interrupts */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1732 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1733 | if (ap->ops->sff_irq_clear) |
| 1734 | ap->ops->sff_irq_clear(ap); |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1735 | ata_sff_irq_on(ap); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1736 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1737 | EXPORT_SYMBOL_GPL(ata_sff_thaw); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1738 | |
| 1739 | /** |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1740 | * ata_sff_prereset - prepare SFF link for reset |
| 1741 | * @link: SFF link to be reset |
| 1742 | * @deadline: deadline jiffies for the operation |
| 1743 | * |
| 1744 | * SFF link @link is about to be reset. Initialize it. It first |
| 1745 | * calls ata_std_prereset() and wait for !BSY if the port is |
| 1746 | * being softreset. |
| 1747 | * |
| 1748 | * LOCKING: |
| 1749 | * Kernel thread context (may sleep) |
| 1750 | * |
| 1751 | * RETURNS: |
| 1752 | * 0 on success, -errno otherwise. |
| 1753 | */ |
| 1754 | int ata_sff_prereset(struct ata_link *link, unsigned long deadline) |
| 1755 | { |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1756 | struct ata_eh_context *ehc = &link->eh_context; |
| 1757 | int rc; |
| 1758 | |
| 1759 | rc = ata_std_prereset(link, deadline); |
| 1760 | if (rc) |
| 1761 | return rc; |
| 1762 | |
| 1763 | /* if we're about to do hardreset, nothing more to do */ |
| 1764 | if (ehc->i.action & ATA_EH_HARDRESET) |
| 1765 | return 0; |
| 1766 | |
| 1767 | /* wait for !BSY if we don't know that no device is attached */ |
| 1768 | if (!ata_link_offline(link)) { |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1769 | rc = ata_sff_wait_ready(link, deadline); |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1770 | if (rc && rc != -ENODEV) { |
| 1771 | ata_link_printk(link, KERN_WARNING, "device not ready " |
| 1772 | "(errno=%d), forcing hardreset\n", rc); |
| 1773 | ehc->i.action |= ATA_EH_HARDRESET; |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | return 0; |
| 1778 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1779 | EXPORT_SYMBOL_GPL(ata_sff_prereset); |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1780 | |
| 1781 | /** |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1782 | * ata_devchk - PATA device presence detection |
| 1783 | * @ap: ATA channel to examine |
| 1784 | * @device: Device to examine (starting at zero) |
| 1785 | * |
| 1786 | * This technique was originally described in |
| 1787 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 1788 | * later found its way into the ATA/ATAPI spec. |
| 1789 | * |
| 1790 | * Write a pattern to the ATA shadow registers, |
| 1791 | * and if a device is present, it will respond by |
| 1792 | * correctly storing and echoing back the |
| 1793 | * ATA shadow register contents. |
| 1794 | * |
| 1795 | * LOCKING: |
| 1796 | * caller. |
| 1797 | */ |
| 1798 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
| 1799 | { |
| 1800 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1801 | u8 nsect, lbal; |
| 1802 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1803 | ap->ops->sff_dev_select(ap, device); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1804 | |
| 1805 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1806 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1807 | |
| 1808 | iowrite8(0xaa, ioaddr->nsect_addr); |
| 1809 | iowrite8(0x55, ioaddr->lbal_addr); |
| 1810 | |
| 1811 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1812 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1813 | |
| 1814 | nsect = ioread8(ioaddr->nsect_addr); |
| 1815 | lbal = ioread8(ioaddr->lbal_addr); |
| 1816 | |
| 1817 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 1818 | return 1; /* we found a device */ |
| 1819 | |
| 1820 | return 0; /* nothing found */ |
| 1821 | } |
| 1822 | |
| 1823 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1824 | * ata_sff_dev_classify - Parse returned ATA device signature |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1825 | * @dev: ATA device to classify (starting at zero) |
| 1826 | * @present: device seems present |
| 1827 | * @r_err: Value of error register on completion |
| 1828 | * |
| 1829 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 1830 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 1831 | * shadow registers, indicating the results of device detection |
| 1832 | * and diagnostics. |
| 1833 | * |
| 1834 | * Select the ATA device, and read the values from the ATA shadow |
| 1835 | * registers. Then parse according to the Error register value, |
| 1836 | * and the spec-defined values examined by ata_dev_classify(). |
| 1837 | * |
| 1838 | * LOCKING: |
| 1839 | * caller. |
| 1840 | * |
| 1841 | * RETURNS: |
| 1842 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. |
| 1843 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1844 | unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1845 | u8 *r_err) |
| 1846 | { |
| 1847 | struct ata_port *ap = dev->link->ap; |
| 1848 | struct ata_taskfile tf; |
| 1849 | unsigned int class; |
| 1850 | u8 err; |
| 1851 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1852 | ap->ops->sff_dev_select(ap, dev->devno); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1853 | |
| 1854 | memset(&tf, 0, sizeof(tf)); |
| 1855 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1856 | ap->ops->sff_tf_read(ap, &tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1857 | err = tf.feature; |
| 1858 | if (r_err) |
| 1859 | *r_err = err; |
| 1860 | |
| 1861 | /* see if device passed diags: continue and warn later */ |
| 1862 | if (err == 0) |
| 1863 | /* diagnostic fail : do nothing _YET_ */ |
| 1864 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
| 1865 | else if (err == 1) |
| 1866 | /* do nothing */ ; |
| 1867 | else if ((dev->devno == 0) && (err == 0x81)) |
| 1868 | /* do nothing */ ; |
| 1869 | else |
| 1870 | return ATA_DEV_NONE; |
| 1871 | |
| 1872 | /* determine if device is ATA or ATAPI */ |
| 1873 | class = ata_dev_classify(&tf); |
| 1874 | |
| 1875 | if (class == ATA_DEV_UNKNOWN) { |
| 1876 | /* If the device failed diagnostic, it's likely to |
| 1877 | * have reported incorrect device signature too. |
| 1878 | * Assume ATA device if the device seems present but |
| 1879 | * device signature is invalid with diagnostic |
| 1880 | * failure. |
| 1881 | */ |
| 1882 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) |
| 1883 | class = ATA_DEV_ATA; |
| 1884 | else |
| 1885 | class = ATA_DEV_NONE; |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1886 | } else if ((class == ATA_DEV_ATA) && |
| 1887 | (ap->ops->sff_check_status(ap) == 0)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1888 | class = ATA_DEV_NONE; |
| 1889 | |
| 1890 | return class; |
| 1891 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1892 | EXPORT_SYMBOL_GPL(ata_sff_dev_classify); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1893 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1894 | /** |
| 1895 | * ata_sff_wait_after_reset - wait for devices to become ready after reset |
| 1896 | * @link: SFF link which is just reset |
| 1897 | * @devmask: mask of present devices |
| 1898 | * @deadline: deadline jiffies for the operation |
| 1899 | * |
| 1900 | * Wait devices attached to SFF @link to become ready after |
| 1901 | * reset. It contains preceding 150ms wait to avoid accessing TF |
| 1902 | * status register too early. |
| 1903 | * |
| 1904 | * LOCKING: |
| 1905 | * Kernel thread context (may sleep). |
| 1906 | * |
| 1907 | * RETURNS: |
| 1908 | * 0 on success, -ENODEV if some or all of devices in @devmask |
| 1909 | * don't seem to exist. -errno on other errors. |
| 1910 | */ |
| 1911 | int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, |
| 1912 | unsigned long deadline) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1913 | { |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1914 | struct ata_port *ap = link->ap; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1915 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1916 | unsigned int dev0 = devmask & (1 << 0); |
| 1917 | unsigned int dev1 = devmask & (1 << 1); |
| 1918 | int rc, ret = 0; |
| 1919 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 1920 | msleep(ATA_WAIT_AFTER_RESET); |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1921 | |
| 1922 | /* always check readiness of the master device */ |
| 1923 | rc = ata_sff_wait_ready(link, deadline); |
| 1924 | /* -ENODEV means the odd clown forgot the D7 pulldown resistor |
| 1925 | * and TF status is 0xff, bail out on it too. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1926 | */ |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1927 | if (rc) |
| 1928 | return rc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1929 | |
| 1930 | /* if device 1 was found in ata_devchk, wait for register |
| 1931 | * access briefly, then wait for BSY to clear. |
| 1932 | */ |
| 1933 | if (dev1) { |
| 1934 | int i; |
| 1935 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1936 | ap->ops->sff_dev_select(ap, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1937 | |
| 1938 | /* Wait for register access. Some ATAPI devices fail |
| 1939 | * to set nsect/lbal after reset, so don't waste too |
| 1940 | * much time on it. We're gonna wait for !BSY anyway. |
| 1941 | */ |
| 1942 | for (i = 0; i < 2; i++) { |
| 1943 | u8 nsect, lbal; |
| 1944 | |
| 1945 | nsect = ioread8(ioaddr->nsect_addr); |
| 1946 | lbal = ioread8(ioaddr->lbal_addr); |
| 1947 | if ((nsect == 1) && (lbal == 1)) |
| 1948 | break; |
| 1949 | msleep(50); /* give drive a breather */ |
| 1950 | } |
| 1951 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1952 | rc = ata_sff_wait_ready(link, deadline); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1953 | if (rc) { |
| 1954 | if (rc != -ENODEV) |
| 1955 | return rc; |
| 1956 | ret = rc; |
| 1957 | } |
| 1958 | } |
| 1959 | |
| 1960 | /* is all this really necessary? */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1961 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1962 | if (dev1) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1963 | ap->ops->sff_dev_select(ap, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1964 | if (dev0) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1965 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1966 | |
| 1967 | return ret; |
| 1968 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1969 | EXPORT_SYMBOL_GPL(ata_sff_wait_after_reset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1970 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1971 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
| 1972 | unsigned long deadline) |
| 1973 | { |
| 1974 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1975 | |
| 1976 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
| 1977 | |
| 1978 | /* software reset. causes dev0 to be selected */ |
| 1979 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
| 1980 | udelay(20); /* FIXME: flush */ |
| 1981 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 1982 | udelay(20); /* FIXME: flush */ |
| 1983 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Stuart MENEFY | e3e4385 | 2009-03-10 11:38:13 +0000 | [diff] [blame] | 1984 | ap->last_ctl = ap->ctl; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1985 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1986 | /* wait the port to become ready */ |
| 1987 | return ata_sff_wait_after_reset(&ap->link, devmask, deadline); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1988 | } |
| 1989 | |
| 1990 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1991 | * ata_sff_softreset - reset host port via ATA SRST |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1992 | * @link: ATA link to reset |
| 1993 | * @classes: resulting classes of attached devices |
| 1994 | * @deadline: deadline jiffies for the operation |
| 1995 | * |
| 1996 | * Reset host port using ATA SRST. |
| 1997 | * |
| 1998 | * LOCKING: |
| 1999 | * Kernel thread context (may sleep) |
| 2000 | * |
| 2001 | * RETURNS: |
| 2002 | * 0 on success, -errno otherwise. |
| 2003 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2004 | int ata_sff_softreset(struct ata_link *link, unsigned int *classes, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2005 | unsigned long deadline) |
| 2006 | { |
| 2007 | struct ata_port *ap = link->ap; |
| 2008 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 2009 | unsigned int devmask = 0; |
| 2010 | int rc; |
| 2011 | u8 err; |
| 2012 | |
| 2013 | DPRINTK("ENTER\n"); |
| 2014 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2015 | /* determine if device 0/1 are present */ |
| 2016 | if (ata_devchk(ap, 0)) |
| 2017 | devmask |= (1 << 0); |
| 2018 | if (slave_possible && ata_devchk(ap, 1)) |
| 2019 | devmask |= (1 << 1); |
| 2020 | |
| 2021 | /* select device 0 again */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2022 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2023 | |
| 2024 | /* issue bus reset */ |
| 2025 | DPRINTK("about to softreset, devmask=%x\n", devmask); |
| 2026 | rc = ata_bus_softreset(ap, devmask, deadline); |
| 2027 | /* if link is occupied, -ENODEV too is an error */ |
| 2028 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
| 2029 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
| 2030 | return rc; |
| 2031 | } |
| 2032 | |
| 2033 | /* determine by signature whether we have ATA or ATAPI devices */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2034 | classes[0] = ata_sff_dev_classify(&link->device[0], |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2035 | devmask & (1 << 0), &err); |
| 2036 | if (slave_possible && err != 0x81) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2037 | classes[1] = ata_sff_dev_classify(&link->device[1], |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2038 | devmask & (1 << 1), &err); |
| 2039 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2040 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
| 2041 | return 0; |
| 2042 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2043 | EXPORT_SYMBOL_GPL(ata_sff_softreset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2044 | |
| 2045 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2046 | * sata_sff_hardreset - reset host port via SATA phy reset |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2047 | * @link: link to reset |
| 2048 | * @class: resulting class of attached device |
| 2049 | * @deadline: deadline jiffies for the operation |
| 2050 | * |
| 2051 | * SATA phy-reset host port using DET bits of SControl register, |
| 2052 | * wait for !BSY and classify the attached device. |
| 2053 | * |
| 2054 | * LOCKING: |
| 2055 | * Kernel thread context (may sleep) |
| 2056 | * |
| 2057 | * RETURNS: |
| 2058 | * 0 on success, -errno otherwise. |
| 2059 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2060 | int sata_sff_hardreset(struct ata_link *link, unsigned int *class, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2061 | unsigned long deadline) |
| 2062 | { |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2063 | struct ata_eh_context *ehc = &link->eh_context; |
| 2064 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
| 2065 | bool online; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2066 | int rc; |
| 2067 | |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2068 | rc = sata_link_hardreset(link, timing, deadline, &online, |
| 2069 | ata_sff_check_ready); |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2070 | if (online) |
| 2071 | *class = ata_sff_dev_classify(link->device, 1, NULL); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2072 | |
| 2073 | DPRINTK("EXIT, class=%u\n", *class); |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2074 | return rc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2075 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2076 | EXPORT_SYMBOL_GPL(sata_sff_hardreset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2077 | |
| 2078 | /** |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2079 | * ata_sff_postreset - SFF postreset callback |
| 2080 | * @link: the target SFF ata_link |
| 2081 | * @classes: classes of attached devices |
| 2082 | * |
| 2083 | * This function is invoked after a successful reset. It first |
| 2084 | * calls ata_std_postreset() and performs SFF specific postreset |
| 2085 | * processing. |
| 2086 | * |
| 2087 | * LOCKING: |
| 2088 | * Kernel thread context (may sleep) |
| 2089 | */ |
| 2090 | void ata_sff_postreset(struct ata_link *link, unsigned int *classes) |
| 2091 | { |
| 2092 | struct ata_port *ap = link->ap; |
| 2093 | |
| 2094 | ata_std_postreset(link, classes); |
| 2095 | |
| 2096 | /* is double-select really necessary? */ |
| 2097 | if (classes[0] != ATA_DEV_NONE) |
| 2098 | ap->ops->sff_dev_select(ap, 1); |
| 2099 | if (classes[1] != ATA_DEV_NONE) |
| 2100 | ap->ops->sff_dev_select(ap, 0); |
| 2101 | |
| 2102 | /* bail out if no device is present */ |
| 2103 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 2104 | DPRINTK("EXIT, no device\n"); |
| 2105 | return; |
| 2106 | } |
| 2107 | |
| 2108 | /* set up device control */ |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 2109 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) { |
| 2110 | ata_sff_set_devctl(ap, ap->ctl); |
Stuart MENEFY | e3e4385 | 2009-03-10 11:38:13 +0000 | [diff] [blame] | 2111 | ap->last_ctl = ap->ctl; |
| 2112 | } |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2113 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2114 | EXPORT_SYMBOL_GPL(ata_sff_postreset); |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2115 | |
| 2116 | /** |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2117 | * ata_sff_drain_fifo - Stock FIFO drain logic for SFF controllers |
| 2118 | * @qc: command |
| 2119 | * |
| 2120 | * Drain the FIFO and device of any stuck data following a command |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 2121 | * failing to complete. In some cases this is necessary before a |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2122 | * reset will recover the device. |
| 2123 | * |
| 2124 | */ |
| 2125 | |
| 2126 | void ata_sff_drain_fifo(struct ata_queued_cmd *qc) |
| 2127 | { |
| 2128 | int count; |
| 2129 | struct ata_port *ap; |
| 2130 | |
| 2131 | /* We only need to flush incoming data when a command was running */ |
| 2132 | if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE) |
| 2133 | return; |
| 2134 | |
| 2135 | ap = qc->ap; |
| 2136 | /* Drain up to 64K of data before we give up this recovery method */ |
| 2137 | for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) |
Robert Hancock | 9a8fd68 | 2009-12-08 20:48:10 -0600 | [diff] [blame] | 2138 | && count < 65536; count += 2) |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2139 | ioread16(ap->ioaddr.data_addr); |
| 2140 | |
| 2141 | /* Can become DEBUG later */ |
| 2142 | if (count) |
| 2143 | ata_port_printk(ap, KERN_DEBUG, |
| 2144 | "drained %d bytes to clear DRQ.\n", count); |
| 2145 | |
| 2146 | } |
| 2147 | EXPORT_SYMBOL_GPL(ata_sff_drain_fifo); |
| 2148 | |
| 2149 | /** |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2150 | * ata_sff_error_handler - Stock error handler for SFF controller |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2151 | * @ap: port to handle error for |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2152 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2153 | * Stock error handler for SFF controller. It can handle both |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2154 | * PATA and SATA controllers. Many controllers should be able to |
| 2155 | * use this EH as-is or with some added handling before and |
| 2156 | * after. |
| 2157 | * |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2158 | * LOCKING: |
| 2159 | * Kernel thread context (may sleep) |
| 2160 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2161 | void ata_sff_error_handler(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2162 | { |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2163 | ata_reset_fn_t softreset = ap->ops->softreset; |
| 2164 | ata_reset_fn_t hardreset = ap->ops->hardreset; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2165 | struct ata_queued_cmd *qc; |
| 2166 | unsigned long flags; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2167 | |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2168 | qc = __ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2169 | if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) |
| 2170 | qc = NULL; |
| 2171 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 2172 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2173 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2174 | /* |
| 2175 | * We *MUST* do FIFO draining before we issue a reset as |
| 2176 | * several devices helpfully clear their internal state and |
| 2177 | * will lock solid if we touch the data port post reset. Pass |
| 2178 | * qc in case anyone wants to do different PIO/DMA recovery or |
| 2179 | * has per command fixups |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2180 | */ |
Tejun Heo | 8244cd0 | 2010-05-10 21:41:36 +0200 | [diff] [blame] | 2181 | if (ap->ops->sff_drain_fifo) |
| 2182 | ap->ops->sff_drain_fifo(qc); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2183 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 2184 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2185 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2186 | /* ignore ata_sff_softreset if ctl isn't accessible */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2187 | if (softreset == ata_sff_softreset && !ap->ioaddr.ctl_addr) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2188 | softreset = NULL; |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2189 | |
| 2190 | /* ignore built-in hardresets if SCR access is not available */ |
| 2191 | if ((hardreset == sata_std_hardreset || |
| 2192 | hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link)) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2193 | hardreset = NULL; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2194 | |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2195 | ata_do_eh(ap, ap->ops->prereset, softreset, hardreset, |
| 2196 | ap->ops->postreset); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2197 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2198 | EXPORT_SYMBOL_GPL(ata_sff_error_handler); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2199 | |
| 2200 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2201 | * ata_sff_std_ports - initialize ioaddr with standard port offsets. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2202 | * @ioaddr: IO address structure to be initialized |
| 2203 | * |
| 2204 | * Utility function which initializes data_addr, error_addr, |
| 2205 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 2206 | * device_addr, status_addr, and command_addr to standard offsets |
| 2207 | * relative to cmd_addr. |
| 2208 | * |
| 2209 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
| 2210 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2211 | void ata_sff_std_ports(struct ata_ioports *ioaddr) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2212 | { |
| 2213 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 2214 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 2215 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 2216 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 2217 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 2218 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 2219 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 2220 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 2221 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 2222 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 2223 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2224 | EXPORT_SYMBOL_GPL(ata_sff_std_ports); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2225 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2226 | #ifdef CONFIG_PCI |
Alan | 4112e16 | 2007-01-08 12:10:05 +0000 | [diff] [blame] | 2227 | |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 2228 | static int ata_resources_present(struct pci_dev *pdev, int port) |
| 2229 | { |
| 2230 | int i; |
| 2231 | |
| 2232 | /* Check the PCI resources for this channel are enabled */ |
| 2233 | port = port * 2; |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2234 | for (i = 0; i < 2; i++) { |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 2235 | if (pci_resource_start(pdev, port + i) == 0 || |
| 2236 | pci_resource_len(pdev, port + i) == 0) |
| 2237 | return 0; |
| 2238 | } |
| 2239 | return 1; |
| 2240 | } |
| 2241 | |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2242 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2243 | * ata_pci_sff_init_host - acquire native PCI ATA resources and init host |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2244 | * @host: target ATA host |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2245 | * |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2246 | * Acquire native PCI ATA resources for @host and initialize the |
| 2247 | * first two ports of @host accordingly. Ports marked dummy are |
| 2248 | * skipped and allocation failure makes the port dummy. |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2249 | * |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 2250 | * Note that native PCI resources are valid even for legacy hosts |
| 2251 | * as we fix up pdev resources array early in boot, so this |
| 2252 | * function can be used for both native and legacy SFF hosts. |
| 2253 | * |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2254 | * LOCKING: |
| 2255 | * Inherited from calling layer (may sleep). |
| 2256 | * |
| 2257 | * RETURNS: |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2258 | * 0 if at least one port is initialized, -ENODEV if no port is |
| 2259 | * available. |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2260 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2261 | int ata_pci_sff_init_host(struct ata_host *host) |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2262 | { |
| 2263 | struct device *gdev = host->dev; |
| 2264 | struct pci_dev *pdev = to_pci_dev(gdev); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2265 | unsigned int mask = 0; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2266 | int i, rc; |
| 2267 | |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2268 | /* request, iomap BARs and init port addresses accordingly */ |
| 2269 | for (i = 0; i < 2; i++) { |
| 2270 | struct ata_port *ap = host->ports[i]; |
| 2271 | int base = i * 2; |
| 2272 | void __iomem * const *iomap; |
| 2273 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2274 | if (ata_port_is_dummy(ap)) |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2275 | continue; |
| 2276 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2277 | /* Discard disabled ports. Some controllers show |
| 2278 | * their unused channels this way. Disabled ports are |
| 2279 | * made dummy. |
| 2280 | */ |
| 2281 | if (!ata_resources_present(pdev, i)) { |
| 2282 | ap->ops = &ata_dummy_port_ops; |
| 2283 | continue; |
| 2284 | } |
| 2285 | |
Tejun Heo | 35a10a8 | 2008-01-04 18:42:21 +0900 | [diff] [blame] | 2286 | rc = pcim_iomap_regions(pdev, 0x3 << base, |
| 2287 | dev_driver_string(gdev)); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2288 | if (rc) { |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2289 | dev_printk(KERN_WARNING, gdev, |
| 2290 | "failed to request/iomap BARs for port %d " |
| 2291 | "(errno=%d)\n", i, rc); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2292 | if (rc == -EBUSY) |
| 2293 | pcim_pin_device(pdev); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2294 | ap->ops = &ata_dummy_port_ops; |
| 2295 | continue; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2296 | } |
| 2297 | host->iomap = iomap = pcim_iomap_table(pdev); |
| 2298 | |
| 2299 | ap->ioaddr.cmd_addr = iomap[base]; |
| 2300 | ap->ioaddr.altstatus_addr = |
| 2301 | ap->ioaddr.ctl_addr = (void __iomem *) |
| 2302 | ((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2303 | ata_sff_std_ports(&ap->ioaddr); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2304 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 2305 | ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", |
| 2306 | (unsigned long long)pci_resource_start(pdev, base), |
| 2307 | (unsigned long long)pci_resource_start(pdev, base + 1)); |
| 2308 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2309 | mask |= 1 << i; |
| 2310 | } |
| 2311 | |
| 2312 | if (!mask) { |
| 2313 | dev_printk(KERN_ERR, gdev, "no available native port\n"); |
| 2314 | return -ENODEV; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2315 | } |
| 2316 | |
| 2317 | return 0; |
| 2318 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2319 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_host); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2320 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2321 | /** |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2322 | * ata_pci_sff_prepare_host - helper to prepare PCI PIO-only SFF ATA host |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2323 | * @pdev: target PCI device |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2324 | * @ppi: array of port_info, must be enough for two ports |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2325 | * @r_host: out argument for the initialized ATA host |
| 2326 | * |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2327 | * Helper to allocate PIO-only SFF ATA host for @pdev, acquire |
| 2328 | * all PCI resources and initialize it accordingly in one go. |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2329 | * |
| 2330 | * LOCKING: |
| 2331 | * Inherited from calling layer (may sleep). |
| 2332 | * |
| 2333 | * RETURNS: |
| 2334 | * 0 on success, -errno otherwise. |
| 2335 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2336 | int ata_pci_sff_prepare_host(struct pci_dev *pdev, |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2337 | const struct ata_port_info * const *ppi, |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 2338 | struct ata_host **r_host) |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2339 | { |
| 2340 | struct ata_host *host; |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2341 | int rc; |
| 2342 | |
| 2343 | if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) |
| 2344 | return -ENOMEM; |
| 2345 | |
| 2346 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); |
| 2347 | if (!host) { |
| 2348 | dev_printk(KERN_ERR, &pdev->dev, |
| 2349 | "failed to allocate ATA host\n"); |
| 2350 | rc = -ENOMEM; |
| 2351 | goto err_out; |
| 2352 | } |
| 2353 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2354 | rc = ata_pci_sff_init_host(host); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2355 | if (rc) |
| 2356 | goto err_out; |
| 2357 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2358 | devres_remove_group(&pdev->dev, NULL); |
| 2359 | *r_host = host; |
| 2360 | return 0; |
| 2361 | |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2362 | err_out: |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2363 | devres_release_group(&pdev->dev, NULL); |
| 2364 | return rc; |
| 2365 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2366 | EXPORT_SYMBOL_GPL(ata_pci_sff_prepare_host); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2367 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2368 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2369 | * ata_pci_sff_activate_host - start SFF host, request IRQ and register it |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2370 | * @host: target SFF ATA host |
| 2371 | * @irq_handler: irq_handler used when requesting IRQ(s) |
| 2372 | * @sht: scsi_host_template to use when registering the host |
| 2373 | * |
| 2374 | * This is the counterpart of ata_host_activate() for SFF ATA |
| 2375 | * hosts. This separate helper is necessary because SFF hosts |
| 2376 | * use two separate interrupts in legacy mode. |
| 2377 | * |
| 2378 | * LOCKING: |
| 2379 | * Inherited from calling layer (may sleep). |
| 2380 | * |
| 2381 | * RETURNS: |
| 2382 | * 0 on success, -errno otherwise. |
| 2383 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2384 | int ata_pci_sff_activate_host(struct ata_host *host, |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2385 | irq_handler_t irq_handler, |
| 2386 | struct scsi_host_template *sht) |
| 2387 | { |
| 2388 | struct device *dev = host->dev; |
| 2389 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2390 | const char *drv_name = dev_driver_string(host->dev); |
| 2391 | int legacy_mode = 0, rc; |
| 2392 | |
| 2393 | rc = ata_host_start(host); |
| 2394 | if (rc) |
| 2395 | return rc; |
| 2396 | |
| 2397 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { |
| 2398 | u8 tmp8, mask; |
| 2399 | |
| 2400 | /* TODO: What if one channel is in native mode ... */ |
| 2401 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); |
| 2402 | mask = (1 << 2) | (1 << 0); |
| 2403 | if ((tmp8 & mask) != mask) |
| 2404 | legacy_mode = 1; |
| 2405 | #if defined(CONFIG_NO_ATA_LEGACY) |
| 2406 | /* Some platforms with PCI limits cannot address compat |
| 2407 | port space. In that case we punt if their firmware has |
| 2408 | left a device in compatibility mode */ |
| 2409 | if (legacy_mode) { |
| 2410 | printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); |
| 2411 | return -EOPNOTSUPP; |
| 2412 | } |
| 2413 | #endif |
| 2414 | } |
| 2415 | |
| 2416 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 2417 | return -ENOMEM; |
| 2418 | |
| 2419 | if (!legacy_mode && pdev->irq) { |
| 2420 | rc = devm_request_irq(dev, pdev->irq, irq_handler, |
| 2421 | IRQF_SHARED, drv_name, host); |
| 2422 | if (rc) |
| 2423 | goto out; |
| 2424 | |
| 2425 | ata_port_desc(host->ports[0], "irq %d", pdev->irq); |
| 2426 | ata_port_desc(host->ports[1], "irq %d", pdev->irq); |
| 2427 | } else if (legacy_mode) { |
| 2428 | if (!ata_port_is_dummy(host->ports[0])) { |
| 2429 | rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev), |
| 2430 | irq_handler, IRQF_SHARED, |
| 2431 | drv_name, host); |
| 2432 | if (rc) |
| 2433 | goto out; |
| 2434 | |
| 2435 | ata_port_desc(host->ports[0], "irq %d", |
| 2436 | ATA_PRIMARY_IRQ(pdev)); |
| 2437 | } |
| 2438 | |
| 2439 | if (!ata_port_is_dummy(host->ports[1])) { |
| 2440 | rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev), |
| 2441 | irq_handler, IRQF_SHARED, |
| 2442 | drv_name, host); |
| 2443 | if (rc) |
| 2444 | goto out; |
| 2445 | |
| 2446 | ata_port_desc(host->ports[1], "irq %d", |
| 2447 | ATA_SECONDARY_IRQ(pdev)); |
| 2448 | } |
| 2449 | } |
| 2450 | |
| 2451 | rc = ata_host_register(host, sht); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2452 | out: |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2453 | if (rc == 0) |
| 2454 | devres_remove_group(dev, NULL); |
| 2455 | else |
| 2456 | devres_release_group(dev, NULL); |
| 2457 | |
| 2458 | return rc; |
| 2459 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2460 | EXPORT_SYMBOL_GPL(ata_pci_sff_activate_host); |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2461 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2462 | static const struct ata_port_info *ata_sff_find_valid_pi( |
| 2463 | const struct ata_port_info * const *ppi) |
| 2464 | { |
| 2465 | int i; |
| 2466 | |
| 2467 | /* look up the first valid port_info */ |
| 2468 | for (i = 0; i < 2 && ppi[i]; i++) |
| 2469 | if (ppi[i]->port_ops != &ata_dummy_port_ops) |
| 2470 | return ppi[i]; |
| 2471 | |
| 2472 | return NULL; |
| 2473 | } |
| 2474 | |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2475 | /** |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2476 | * ata_pci_sff_init_one - Initialize/register PIO-only PCI IDE controller |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2477 | * @pdev: Controller to be initialized |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2478 | * @ppi: array of port_info, must be enough for two ports |
Tejun Heo | 1bd5b71 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 2479 | * @sht: scsi_host_template to use when registering the host |
Tejun Heo | 887125e | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 2480 | * @host_priv: host private_data |
Alan Cox | 16ea0fc | 2010-02-23 02:26:06 -0500 | [diff] [blame] | 2481 | * @hflag: host flags |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2482 | * |
| 2483 | * This is a helper function which can be called from a driver's |
| 2484 | * xxx_init_one() probe function if the hardware uses traditional |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2485 | * IDE taskfile registers and is PIO only. |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2486 | * |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 2487 | * ASSUMPTION: |
| 2488 | * Nobody makes a single channel controller that appears solely as |
| 2489 | * the secondary legacy port on PCI. |
| 2490 | * |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2491 | * LOCKING: |
| 2492 | * Inherited from PCI layer (may sleep). |
| 2493 | * |
| 2494 | * RETURNS: |
| 2495 | * Zero on success, negative on errno-based value on error. |
| 2496 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2497 | int ata_pci_sff_init_one(struct pci_dev *pdev, |
Alan Cox | 16ea0fc | 2010-02-23 02:26:06 -0500 | [diff] [blame] | 2498 | const struct ata_port_info * const *ppi, |
| 2499 | struct scsi_host_template *sht, void *host_priv, int hflag) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2500 | { |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 2501 | struct device *dev = &pdev->dev; |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2502 | const struct ata_port_info *pi; |
Tejun Heo | 0f834de | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2503 | struct ata_host *host = NULL; |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2504 | int rc; |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2505 | |
| 2506 | DPRINTK("ENTER\n"); |
| 2507 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2508 | pi = ata_sff_find_valid_pi(ppi); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2509 | if (!pi) { |
| 2510 | dev_printk(KERN_ERR, &pdev->dev, |
| 2511 | "no valid port_info specified\n"); |
| 2512 | return -EINVAL; |
| 2513 | } |
| 2514 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 2515 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 2516 | return -ENOMEM; |
| 2517 | |
Tejun Heo | f0d36ef | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 2518 | rc = pcim_enable_device(pdev); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2519 | if (rc) |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2520 | goto out; |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2521 | |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2522 | /* prepare and activate SFF host */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2523 | rc = ata_pci_sff_prepare_host(pdev, ppi, &host); |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 2524 | if (rc) |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2525 | goto out; |
Tejun Heo | 887125e | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 2526 | host->private_data = host_priv; |
Alan Cox | 16ea0fc | 2010-02-23 02:26:06 -0500 | [diff] [blame] | 2527 | host->flags |= hflag; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2528 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2529 | rc = ata_pci_sff_activate_host(host, ata_sff_interrupt, sht); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2530 | out: |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2531 | if (rc == 0) |
| 2532 | devres_remove_group(&pdev->dev, NULL); |
| 2533 | else |
| 2534 | devres_release_group(&pdev->dev, NULL); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2535 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2536 | return rc; |
| 2537 | } |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2538 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_one); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2539 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2540 | #endif /* CONFIG_PCI */ |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2541 | |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 2542 | /* |
| 2543 | * BMDMA support |
| 2544 | */ |
| 2545 | |
| 2546 | #ifdef CONFIG_ATA_BMDMA |
| 2547 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2548 | const struct ata_port_operations ata_bmdma_port_ops = { |
| 2549 | .inherits = &ata_sff_port_ops, |
| 2550 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2551 | .error_handler = ata_bmdma_error_handler, |
| 2552 | .post_internal_cmd = ata_bmdma_post_internal_cmd, |
| 2553 | |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2554 | .qc_prep = ata_bmdma_qc_prep, |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2555 | .qc_issue = ata_bmdma_qc_issue, |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2556 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2557 | .sff_irq_clear = ata_bmdma_irq_clear, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2558 | .bmdma_setup = ata_bmdma_setup, |
| 2559 | .bmdma_start = ata_bmdma_start, |
| 2560 | .bmdma_stop = ata_bmdma_stop, |
| 2561 | .bmdma_status = ata_bmdma_status, |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 2562 | |
| 2563 | .port_start = ata_bmdma_port_start, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2564 | }; |
| 2565 | EXPORT_SYMBOL_GPL(ata_bmdma_port_ops); |
| 2566 | |
| 2567 | const struct ata_port_operations ata_bmdma32_port_ops = { |
| 2568 | .inherits = &ata_bmdma_port_ops, |
| 2569 | |
| 2570 | .sff_data_xfer = ata_sff_data_xfer32, |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 2571 | .port_start = ata_bmdma_port_start32, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2572 | }; |
| 2573 | EXPORT_SYMBOL_GPL(ata_bmdma32_port_ops); |
| 2574 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2575 | /** |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2576 | * ata_bmdma_fill_sg - Fill PCI IDE PRD table |
| 2577 | * @qc: Metadata associated with taskfile to be transferred |
| 2578 | * |
| 2579 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2580 | * associated with the current disk command. |
| 2581 | * |
| 2582 | * LOCKING: |
| 2583 | * spin_lock_irqsave(host lock) |
| 2584 | * |
| 2585 | */ |
| 2586 | static void ata_bmdma_fill_sg(struct ata_queued_cmd *qc) |
| 2587 | { |
| 2588 | struct ata_port *ap = qc->ap; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2589 | struct ata_bmdma_prd *prd = ap->bmdma_prd; |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2590 | struct scatterlist *sg; |
| 2591 | unsigned int si, pi; |
| 2592 | |
| 2593 | pi = 0; |
| 2594 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
| 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 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2611 | prd[pi].addr = cpu_to_le32(addr); |
| 2612 | prd[pi].flags_len = cpu_to_le32(len & 0xffff); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2613 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
| 2614 | |
| 2615 | pi++; |
| 2616 | sg_len -= len; |
| 2617 | addr += len; |
| 2618 | } |
| 2619 | } |
| 2620 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2621 | prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2622 | } |
| 2623 | |
| 2624 | /** |
| 2625 | * ata_bmdma_fill_sg_dumb - Fill PCI IDE PRD table |
| 2626 | * @qc: Metadata associated with taskfile to be transferred |
| 2627 | * |
| 2628 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2629 | * associated with the current disk command. Perform the fill |
| 2630 | * so that we avoid writing any length 64K records for |
| 2631 | * controllers that don't follow the spec. |
| 2632 | * |
| 2633 | * LOCKING: |
| 2634 | * spin_lock_irqsave(host lock) |
| 2635 | * |
| 2636 | */ |
| 2637 | static void ata_bmdma_fill_sg_dumb(struct ata_queued_cmd *qc) |
| 2638 | { |
| 2639 | struct ata_port *ap = qc->ap; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2640 | struct ata_bmdma_prd *prd = ap->bmdma_prd; |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2641 | struct scatterlist *sg; |
| 2642 | unsigned int si, pi; |
| 2643 | |
| 2644 | pi = 0; |
| 2645 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
| 2646 | u32 addr, offset; |
| 2647 | u32 sg_len, len, blen; |
| 2648 | |
| 2649 | /* determine if physical DMA addr spans 64K boundary. |
| 2650 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2651 | * truncate dma_addr_t to u32. |
| 2652 | */ |
| 2653 | addr = (u32) sg_dma_address(sg); |
| 2654 | sg_len = sg_dma_len(sg); |
| 2655 | |
| 2656 | while (sg_len) { |
| 2657 | offset = addr & 0xffff; |
| 2658 | len = sg_len; |
| 2659 | if ((offset + sg_len) > 0x10000) |
| 2660 | len = 0x10000 - offset; |
| 2661 | |
| 2662 | blen = len & 0xffff; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2663 | prd[pi].addr = cpu_to_le32(addr); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2664 | if (blen == 0) { |
| 2665 | /* Some PATA chipsets like the CS5530 can't |
| 2666 | cope with 0x0000 meaning 64K as the spec |
| 2667 | says */ |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2668 | prd[pi].flags_len = cpu_to_le32(0x8000); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2669 | blen = 0x8000; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2670 | prd[++pi].addr = cpu_to_le32(addr + 0x8000); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2671 | } |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2672 | prd[pi].flags_len = cpu_to_le32(blen); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2673 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
| 2674 | |
| 2675 | pi++; |
| 2676 | sg_len -= len; |
| 2677 | addr += len; |
| 2678 | } |
| 2679 | } |
| 2680 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2681 | prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2682 | } |
| 2683 | |
| 2684 | /** |
| 2685 | * ata_bmdma_qc_prep - Prepare taskfile for submission |
| 2686 | * @qc: Metadata associated with taskfile to be prepared |
| 2687 | * |
| 2688 | * Prepare ATA taskfile for submission. |
| 2689 | * |
| 2690 | * LOCKING: |
| 2691 | * spin_lock_irqsave(host lock) |
| 2692 | */ |
| 2693 | void ata_bmdma_qc_prep(struct ata_queued_cmd *qc) |
| 2694 | { |
| 2695 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2696 | return; |
| 2697 | |
| 2698 | ata_bmdma_fill_sg(qc); |
| 2699 | } |
| 2700 | EXPORT_SYMBOL_GPL(ata_bmdma_qc_prep); |
| 2701 | |
| 2702 | /** |
| 2703 | * ata_bmdma_dumb_qc_prep - Prepare taskfile for submission |
| 2704 | * @qc: Metadata associated with taskfile to be prepared |
| 2705 | * |
| 2706 | * Prepare ATA taskfile for submission. |
| 2707 | * |
| 2708 | * LOCKING: |
| 2709 | * spin_lock_irqsave(host lock) |
| 2710 | */ |
| 2711 | void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc) |
| 2712 | { |
| 2713 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2714 | return; |
| 2715 | |
| 2716 | ata_bmdma_fill_sg_dumb(qc); |
| 2717 | } |
| 2718 | EXPORT_SYMBOL_GPL(ata_bmdma_dumb_qc_prep); |
| 2719 | |
| 2720 | /** |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2721 | * ata_bmdma_qc_issue - issue taskfile to a BMDMA controller |
| 2722 | * @qc: command to issue to device |
| 2723 | * |
| 2724 | * This function issues a PIO, NODATA or DMA command to a |
| 2725 | * SFF/BMDMA controller. PIO and NODATA are handled by |
| 2726 | * ata_sff_qc_issue(). |
| 2727 | * |
| 2728 | * LOCKING: |
| 2729 | * spin_lock_irqsave(host lock) |
| 2730 | * |
| 2731 | * RETURNS: |
| 2732 | * Zero on success, AC_ERR_* mask on failure |
| 2733 | */ |
| 2734 | unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc) |
| 2735 | { |
| 2736 | struct ata_port *ap = qc->ap; |
| 2737 | |
| 2738 | /* see ata_dma_blacklisted() */ |
| 2739 | BUG_ON((ap->flags & ATA_FLAG_PIO_POLLING) && |
| 2740 | qc->tf.protocol == ATAPI_PROT_DMA); |
| 2741 | |
| 2742 | /* defer PIO handling to sff_qc_issue */ |
| 2743 | if (!ata_is_dma(qc->tf.protocol)) |
| 2744 | return ata_sff_qc_issue(qc); |
| 2745 | |
| 2746 | /* select the device */ |
| 2747 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 2748 | |
| 2749 | /* start the command */ |
| 2750 | switch (qc->tf.protocol) { |
| 2751 | case ATA_PROT_DMA: |
| 2752 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
| 2753 | |
| 2754 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
| 2755 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 2756 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 2757 | ap->hsm_task_state = HSM_ST_LAST; |
| 2758 | break; |
| 2759 | |
| 2760 | case ATAPI_PROT_DMA: |
| 2761 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
| 2762 | |
| 2763 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
| 2764 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 2765 | ap->hsm_task_state = HSM_ST_FIRST; |
| 2766 | |
| 2767 | /* send cdb by polling if no cdb interrupt */ |
| 2768 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
| 2769 | ata_sff_queue_pio_task(ap, 0); |
| 2770 | break; |
| 2771 | |
| 2772 | default: |
| 2773 | WARN_ON(1); |
| 2774 | return AC_ERR_SYSTEM; |
| 2775 | } |
| 2776 | |
| 2777 | return 0; |
| 2778 | } |
| 2779 | EXPORT_SYMBOL_GPL(ata_bmdma_qc_issue); |
| 2780 | |
| 2781 | /** |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 2782 | * ata_bmdma_port_intr - Handle BMDMA port interrupt |
| 2783 | * @ap: Port on which interrupt arrived (possibly...) |
| 2784 | * @qc: Taskfile currently active in engine |
| 2785 | * |
| 2786 | * Handle port interrupt for given queued command. |
| 2787 | * |
| 2788 | * LOCKING: |
| 2789 | * spin_lock_irqsave(host lock) |
| 2790 | * |
| 2791 | * RETURNS: |
| 2792 | * One if interrupt was handled, zero if not (shared irq). |
| 2793 | */ |
| 2794 | unsigned int ata_bmdma_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 2795 | { |
| 2796 | struct ata_eh_info *ehi = &ap->link.eh_info; |
| 2797 | u8 host_stat = 0; |
| 2798 | bool bmdma_stopped = false; |
| 2799 | unsigned int handled; |
| 2800 | |
| 2801 | if (ap->hsm_task_state == HSM_ST_LAST && ata_is_dma(qc->tf.protocol)) { |
| 2802 | /* check status of DMA engine */ |
| 2803 | host_stat = ap->ops->bmdma_status(ap); |
| 2804 | VPRINTK("ata%u: host_stat 0x%X\n", ap->print_id, host_stat); |
| 2805 | |
| 2806 | /* if it's not our irq... */ |
| 2807 | if (!(host_stat & ATA_DMA_INTR)) |
| 2808 | return ata_sff_idle_irq(ap); |
| 2809 | |
| 2810 | /* before we do anything else, clear DMA-Start bit */ |
| 2811 | ap->ops->bmdma_stop(qc); |
| 2812 | bmdma_stopped = true; |
| 2813 | |
| 2814 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
| 2815 | /* error when transfering data to/from memory */ |
| 2816 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 2817 | ap->hsm_task_state = HSM_ST_ERR; |
| 2818 | } |
| 2819 | } |
| 2820 | |
| 2821 | handled = __ata_sff_port_intr(ap, qc, bmdma_stopped); |
| 2822 | |
| 2823 | if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol)) |
| 2824 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 2825 | |
| 2826 | return handled; |
| 2827 | } |
| 2828 | EXPORT_SYMBOL_GPL(ata_bmdma_port_intr); |
| 2829 | |
| 2830 | /** |
| 2831 | * ata_bmdma_interrupt - Default BMDMA ATA host interrupt handler |
| 2832 | * @irq: irq line (unused) |
| 2833 | * @dev_instance: pointer to our ata_host information structure |
| 2834 | * |
| 2835 | * Default interrupt handler for PCI IDE devices. Calls |
| 2836 | * ata_bmdma_port_intr() for each port that is not disabled. |
| 2837 | * |
| 2838 | * LOCKING: |
| 2839 | * Obtains host lock during operation. |
| 2840 | * |
| 2841 | * RETURNS: |
| 2842 | * IRQ_NONE or IRQ_HANDLED. |
| 2843 | */ |
| 2844 | irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance) |
| 2845 | { |
| 2846 | return __ata_sff_interrupt(irq, dev_instance, ata_bmdma_port_intr); |
| 2847 | } |
| 2848 | EXPORT_SYMBOL_GPL(ata_bmdma_interrupt); |
| 2849 | |
| 2850 | /** |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2851 | * ata_bmdma_error_handler - Stock error handler for BMDMA controller |
| 2852 | * @ap: port to handle error for |
| 2853 | * |
| 2854 | * Stock error handler for BMDMA controller. It can handle both |
| 2855 | * PATA and SATA controllers. Most BMDMA controllers should be |
| 2856 | * able to use this EH as-is or with some added handling before |
| 2857 | * and after. |
| 2858 | * |
| 2859 | * LOCKING: |
| 2860 | * Kernel thread context (may sleep) |
| 2861 | */ |
| 2862 | void ata_bmdma_error_handler(struct ata_port *ap) |
| 2863 | { |
| 2864 | struct ata_queued_cmd *qc; |
| 2865 | unsigned long flags; |
| 2866 | bool thaw = false; |
| 2867 | |
| 2868 | qc = __ata_qc_from_tag(ap, ap->link.active_tag); |
| 2869 | if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) |
| 2870 | qc = NULL; |
| 2871 | |
| 2872 | /* reset PIO HSM and stop DMA engine */ |
| 2873 | spin_lock_irqsave(ap->lock, flags); |
| 2874 | |
| 2875 | if (qc && ata_is_dma(qc->tf.protocol)) { |
| 2876 | u8 host_stat; |
| 2877 | |
| 2878 | host_stat = ap->ops->bmdma_status(ap); |
| 2879 | |
| 2880 | /* BMDMA controllers indicate host bus error by |
| 2881 | * setting DMA_ERR bit and timing out. As it wasn't |
| 2882 | * really a timeout event, adjust error mask and |
| 2883 | * cancel frozen state. |
| 2884 | */ |
| 2885 | if (qc->err_mask == AC_ERR_TIMEOUT && (host_stat & ATA_DMA_ERR)) { |
| 2886 | qc->err_mask = AC_ERR_HOST_BUS; |
| 2887 | thaw = true; |
| 2888 | } |
| 2889 | |
| 2890 | ap->ops->bmdma_stop(qc); |
| 2891 | |
| 2892 | /* if we're gonna thaw, make sure IRQ is clear */ |
| 2893 | if (thaw) { |
| 2894 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2895 | if (ap->ops->sff_irq_clear) |
| 2896 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2897 | } |
| 2898 | } |
| 2899 | |
| 2900 | spin_unlock_irqrestore(ap->lock, flags); |
| 2901 | |
| 2902 | if (thaw) |
| 2903 | ata_eh_thaw_port(ap); |
| 2904 | |
| 2905 | ata_sff_error_handler(ap); |
| 2906 | } |
| 2907 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); |
| 2908 | |
| 2909 | /** |
| 2910 | * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for BMDMA |
| 2911 | * @qc: internal command to clean up |
| 2912 | * |
| 2913 | * LOCKING: |
| 2914 | * Kernel thread context (may sleep) |
| 2915 | */ |
| 2916 | void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc) |
| 2917 | { |
| 2918 | struct ata_port *ap = qc->ap; |
| 2919 | unsigned long flags; |
| 2920 | |
| 2921 | if (ata_is_dma(qc->tf.protocol)) { |
| 2922 | spin_lock_irqsave(ap->lock, flags); |
| 2923 | ap->ops->bmdma_stop(qc); |
| 2924 | spin_unlock_irqrestore(ap->lock, flags); |
| 2925 | } |
| 2926 | } |
| 2927 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); |
| 2928 | |
| 2929 | /** |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2930 | * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. |
| 2931 | * @ap: Port associated with this ATA transaction. |
| 2932 | * |
| 2933 | * Clear interrupt and error flags in DMA status register. |
| 2934 | * |
| 2935 | * May be used as the irq_clear() entry in ata_port_operations. |
| 2936 | * |
| 2937 | * LOCKING: |
| 2938 | * spin_lock_irqsave(host lock) |
| 2939 | */ |
| 2940 | void ata_bmdma_irq_clear(struct ata_port *ap) |
| 2941 | { |
| 2942 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
| 2943 | |
| 2944 | if (!mmio) |
| 2945 | return; |
| 2946 | |
| 2947 | iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS); |
| 2948 | } |
| 2949 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 2950 | |
| 2951 | /** |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2952 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction |
| 2953 | * @qc: Info associated with this ATA transaction. |
| 2954 | * |
| 2955 | * LOCKING: |
| 2956 | * spin_lock_irqsave(host lock) |
| 2957 | */ |
| 2958 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
| 2959 | { |
| 2960 | struct ata_port *ap = qc->ap; |
| 2961 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 2962 | u8 dmactl; |
| 2963 | |
| 2964 | /* load PRD table addr. */ |
| 2965 | mb(); /* make sure PRD table writes are visible to controller */ |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2966 | iowrite32(ap->bmdma_prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2967 | |
| 2968 | /* specify data direction, triple-check start bit is clear */ |
| 2969 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 2970 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 2971 | if (!rw) |
| 2972 | dmactl |= ATA_DMA_WR; |
| 2973 | iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 2974 | |
| 2975 | /* issue r/w command */ |
| 2976 | ap->ops->sff_exec_command(ap, &qc->tf); |
| 2977 | } |
| 2978 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 2979 | |
| 2980 | /** |
| 2981 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction |
| 2982 | * @qc: Info associated with this ATA transaction. |
| 2983 | * |
| 2984 | * LOCKING: |
| 2985 | * spin_lock_irqsave(host lock) |
| 2986 | */ |
| 2987 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
| 2988 | { |
| 2989 | struct ata_port *ap = qc->ap; |
| 2990 | u8 dmactl; |
| 2991 | |
| 2992 | /* start host DMA transaction */ |
| 2993 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 2994 | iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 2995 | |
| 2996 | /* Strictly, one may wish to issue an ioread8() here, to |
| 2997 | * flush the mmio write. However, control also passes |
| 2998 | * to the hardware at this point, and it will interrupt |
| 2999 | * us when we are to resume control. So, in effect, |
| 3000 | * we don't care when the mmio write flushes. |
| 3001 | * Further, a read of the DMA status register _immediately_ |
| 3002 | * following the write may not be what certain flaky hardware |
| 3003 | * is expected, so I think it is best to not add a readb() |
| 3004 | * without first all the MMIO ATA cards/mobos. |
| 3005 | * Or maybe I'm just being paranoid. |
| 3006 | * |
| 3007 | * FIXME: The posting of this write means I/O starts are |
| 3008 | * unneccessarily delayed for MMIO |
| 3009 | */ |
| 3010 | } |
| 3011 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 3012 | |
| 3013 | /** |
| 3014 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer |
| 3015 | * @qc: Command we are ending DMA for |
| 3016 | * |
| 3017 | * Clears the ATA_DMA_START flag in the dma control register |
| 3018 | * |
| 3019 | * May be used as the bmdma_stop() entry in ata_port_operations. |
| 3020 | * |
| 3021 | * LOCKING: |
| 3022 | * spin_lock_irqsave(host lock) |
| 3023 | */ |
| 3024 | void ata_bmdma_stop(struct ata_queued_cmd *qc) |
| 3025 | { |
| 3026 | struct ata_port *ap = qc->ap; |
| 3027 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
| 3028 | |
| 3029 | /* clear start/stop bit */ |
| 3030 | iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3031 | mmio + ATA_DMA_CMD); |
| 3032 | |
| 3033 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ |
| 3034 | ata_sff_dma_pause(ap); |
| 3035 | } |
| 3036 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
| 3037 | |
| 3038 | /** |
| 3039 | * ata_bmdma_status - Read PCI IDE BMDMA status |
| 3040 | * @ap: Port associated with this ATA transaction. |
| 3041 | * |
| 3042 | * Read and return BMDMA status register. |
| 3043 | * |
| 3044 | * May be used as the bmdma_status() entry in ata_port_operations. |
| 3045 | * |
| 3046 | * LOCKING: |
| 3047 | * spin_lock_irqsave(host lock) |
| 3048 | */ |
| 3049 | u8 ata_bmdma_status(struct ata_port *ap) |
| 3050 | { |
| 3051 | return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 3052 | } |
| 3053 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 3054 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3055 | |
| 3056 | /** |
| 3057 | * ata_bmdma_port_start - Set port up for bmdma. |
| 3058 | * @ap: Port to initialize |
| 3059 | * |
| 3060 | * Called just after data structures for each port are |
| 3061 | * initialized. Allocates space for PRD table. |
| 3062 | * |
| 3063 | * May be used as the port_start() entry in ata_port_operations. |
| 3064 | * |
| 3065 | * LOCKING: |
| 3066 | * Inherited from caller. |
| 3067 | */ |
| 3068 | int ata_bmdma_port_start(struct ata_port *ap) |
| 3069 | { |
| 3070 | if (ap->mwdma_mask || ap->udma_mask) { |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 3071 | ap->bmdma_prd = |
| 3072 | dmam_alloc_coherent(ap->host->dev, ATA_PRD_TBL_SZ, |
| 3073 | &ap->bmdma_prd_dma, GFP_KERNEL); |
| 3074 | if (!ap->bmdma_prd) |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3075 | return -ENOMEM; |
| 3076 | } |
| 3077 | |
| 3078 | return 0; |
| 3079 | } |
| 3080 | EXPORT_SYMBOL_GPL(ata_bmdma_port_start); |
| 3081 | |
| 3082 | /** |
| 3083 | * ata_bmdma_port_start32 - Set port up for dma. |
| 3084 | * @ap: Port to initialize |
| 3085 | * |
| 3086 | * Called just after data structures for each port are |
| 3087 | * initialized. Enables 32bit PIO and allocates space for PRD |
| 3088 | * table. |
| 3089 | * |
| 3090 | * May be used as the port_start() entry in ata_port_operations for |
| 3091 | * devices that are capable of 32bit PIO. |
| 3092 | * |
| 3093 | * LOCKING: |
| 3094 | * Inherited from caller. |
| 3095 | */ |
| 3096 | int ata_bmdma_port_start32(struct ata_port *ap) |
| 3097 | { |
| 3098 | ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE; |
| 3099 | return ata_bmdma_port_start(ap); |
| 3100 | } |
| 3101 | EXPORT_SYMBOL_GPL(ata_bmdma_port_start32); |
| 3102 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3103 | #ifdef CONFIG_PCI |
| 3104 | |
| 3105 | /** |
| 3106 | * ata_pci_bmdma_clear_simplex - attempt to kick device out of simplex |
| 3107 | * @pdev: PCI device |
| 3108 | * |
| 3109 | * Some PCI ATA devices report simplex mode but in fact can be told to |
| 3110 | * enter non simplex mode. This implements the necessary logic to |
| 3111 | * perform the task on such devices. Calling it on other devices will |
| 3112 | * have -undefined- behaviour. |
| 3113 | */ |
| 3114 | int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev) |
| 3115 | { |
| 3116 | unsigned long bmdma = pci_resource_start(pdev, 4); |
| 3117 | u8 simplex; |
| 3118 | |
| 3119 | if (bmdma == 0) |
| 3120 | return -ENOENT; |
| 3121 | |
| 3122 | simplex = inb(bmdma + 0x02); |
| 3123 | outb(simplex & 0x60, bmdma + 0x02); |
| 3124 | simplex = inb(bmdma + 0x02); |
| 3125 | if (simplex & 0x80) |
| 3126 | return -EOPNOTSUPP; |
| 3127 | return 0; |
| 3128 | } |
| 3129 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_clear_simplex); |
| 3130 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3131 | static void ata_bmdma_nodma(struct ata_host *host, const char *reason) |
| 3132 | { |
| 3133 | int i; |
| 3134 | |
| 3135 | dev_printk(KERN_ERR, host->dev, "BMDMA: %s, falling back to PIO\n", |
| 3136 | reason); |
| 3137 | |
| 3138 | for (i = 0; i < 2; i++) { |
| 3139 | host->ports[i]->mwdma_mask = 0; |
| 3140 | host->ports[i]->udma_mask = 0; |
| 3141 | } |
| 3142 | } |
| 3143 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3144 | /** |
| 3145 | * ata_pci_bmdma_init - acquire PCI BMDMA resources and init ATA host |
| 3146 | * @host: target ATA host |
| 3147 | * |
| 3148 | * Acquire PCI BMDMA resources and initialize @host accordingly. |
| 3149 | * |
| 3150 | * LOCKING: |
| 3151 | * Inherited from calling layer (may sleep). |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3152 | */ |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3153 | void ata_pci_bmdma_init(struct ata_host *host) |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3154 | { |
| 3155 | struct device *gdev = host->dev; |
| 3156 | struct pci_dev *pdev = to_pci_dev(gdev); |
| 3157 | int i, rc; |
| 3158 | |
| 3159 | /* No BAR4 allocation: No DMA */ |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3160 | if (pci_resource_start(pdev, 4) == 0) { |
| 3161 | ata_bmdma_nodma(host, "BAR4 is zero"); |
| 3162 | return; |
| 3163 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3164 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3165 | /* |
| 3166 | * Some controllers require BMDMA region to be initialized |
| 3167 | * even if DMA is not in use to clear IRQ status via |
| 3168 | * ->sff_irq_clear method. Try to initialize bmdma_addr |
| 3169 | * regardless of dma masks. |
| 3170 | */ |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3171 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 3172 | if (rc) |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3173 | ata_bmdma_nodma(host, "failed to set dma mask"); |
| 3174 | if (!rc) { |
| 3175 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 3176 | if (rc) |
| 3177 | ata_bmdma_nodma(host, |
| 3178 | "failed to set consistent dma mask"); |
| 3179 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3180 | |
| 3181 | /* request and iomap DMA region */ |
| 3182 | rc = pcim_iomap_regions(pdev, 1 << 4, dev_driver_string(gdev)); |
| 3183 | if (rc) { |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3184 | ata_bmdma_nodma(host, "failed to request/iomap BAR4"); |
| 3185 | return; |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3186 | } |
| 3187 | host->iomap = pcim_iomap_table(pdev); |
| 3188 | |
| 3189 | for (i = 0; i < 2; i++) { |
| 3190 | struct ata_port *ap = host->ports[i]; |
| 3191 | void __iomem *bmdma = host->iomap[4] + 8 * i; |
| 3192 | |
| 3193 | if (ata_port_is_dummy(ap)) |
| 3194 | continue; |
| 3195 | |
| 3196 | ap->ioaddr.bmdma_addr = bmdma; |
| 3197 | if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) && |
| 3198 | (ioread8(bmdma + 2) & 0x80)) |
| 3199 | host->flags |= ATA_HOST_SIMPLEX; |
| 3200 | |
| 3201 | ata_port_desc(ap, "bmdma 0x%llx", |
| 3202 | (unsigned long long)pci_resource_start(pdev, 4) + 8 * i); |
| 3203 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3204 | } |
| 3205 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_init); |
| 3206 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 3207 | /** |
| 3208 | * ata_pci_bmdma_prepare_host - helper to prepare PCI BMDMA ATA host |
| 3209 | * @pdev: target PCI device |
| 3210 | * @ppi: array of port_info, must be enough for two ports |
| 3211 | * @r_host: out argument for the initialized ATA host |
| 3212 | * |
| 3213 | * Helper to allocate BMDMA ATA host for @pdev, acquire all PCI |
| 3214 | * resources and initialize it accordingly in one go. |
| 3215 | * |
| 3216 | * LOCKING: |
| 3217 | * Inherited from calling layer (may sleep). |
| 3218 | * |
| 3219 | * RETURNS: |
| 3220 | * 0 on success, -errno otherwise. |
| 3221 | */ |
| 3222 | int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, |
| 3223 | const struct ata_port_info * const * ppi, |
| 3224 | struct ata_host **r_host) |
| 3225 | { |
| 3226 | int rc; |
| 3227 | |
| 3228 | rc = ata_pci_sff_prepare_host(pdev, ppi, r_host); |
| 3229 | if (rc) |
| 3230 | return rc; |
| 3231 | |
| 3232 | ata_pci_bmdma_init(*r_host); |
| 3233 | return 0; |
| 3234 | } |
| 3235 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_prepare_host); |
| 3236 | |
| 3237 | /** |
| 3238 | * ata_pci_bmdma_init_one - Initialize/register BMDMA PCI IDE controller |
| 3239 | * @pdev: Controller to be initialized |
| 3240 | * @ppi: array of port_info, must be enough for two ports |
| 3241 | * @sht: scsi_host_template to use when registering the host |
| 3242 | * @host_priv: host private_data |
| 3243 | * @hflags: host flags |
| 3244 | * |
| 3245 | * This function is similar to ata_pci_sff_init_one() but also |
| 3246 | * takes care of BMDMA initialization. |
| 3247 | * |
| 3248 | * LOCKING: |
| 3249 | * Inherited from PCI layer (may sleep). |
| 3250 | * |
| 3251 | * RETURNS: |
| 3252 | * Zero on success, negative on errno-based value on error. |
| 3253 | */ |
| 3254 | int ata_pci_bmdma_init_one(struct pci_dev *pdev, |
| 3255 | const struct ata_port_info * const * ppi, |
| 3256 | struct scsi_host_template *sht, void *host_priv, |
| 3257 | int hflags) |
| 3258 | { |
| 3259 | struct device *dev = &pdev->dev; |
| 3260 | const struct ata_port_info *pi; |
| 3261 | struct ata_host *host = NULL; |
| 3262 | int rc; |
| 3263 | |
| 3264 | DPRINTK("ENTER\n"); |
| 3265 | |
| 3266 | pi = ata_sff_find_valid_pi(ppi); |
| 3267 | if (!pi) { |
| 3268 | dev_printk(KERN_ERR, &pdev->dev, |
| 3269 | "no valid port_info specified\n"); |
| 3270 | return -EINVAL; |
| 3271 | } |
| 3272 | |
| 3273 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 3274 | return -ENOMEM; |
| 3275 | |
| 3276 | rc = pcim_enable_device(pdev); |
| 3277 | if (rc) |
| 3278 | goto out; |
| 3279 | |
| 3280 | /* prepare and activate BMDMA host */ |
| 3281 | rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host); |
| 3282 | if (rc) |
| 3283 | goto out; |
| 3284 | host->private_data = host_priv; |
| 3285 | host->flags |= hflags; |
| 3286 | |
| 3287 | pci_set_master(pdev); |
| 3288 | rc = ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht); |
| 3289 | out: |
| 3290 | if (rc == 0) |
| 3291 | devres_remove_group(&pdev->dev, NULL); |
| 3292 | else |
| 3293 | devres_release_group(&pdev->dev, NULL); |
| 3294 | |
| 3295 | return rc; |
| 3296 | } |
| 3297 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_init_one); |
| 3298 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3299 | #endif /* CONFIG_PCI */ |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 3300 | #endif /* CONFIG_ATA_BMDMA */ |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3301 | |
| 3302 | /** |
| 3303 | * ata_sff_port_init - Initialize SFF/BMDMA ATA port |
| 3304 | * @ap: Port to initialize |
| 3305 | * |
| 3306 | * Called on port allocation to initialize SFF/BMDMA specific |
| 3307 | * fields. |
| 3308 | * |
| 3309 | * LOCKING: |
| 3310 | * None. |
| 3311 | */ |
| 3312 | void ata_sff_port_init(struct ata_port *ap) |
| 3313 | { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3314 | INIT_DELAYED_WORK(&ap->sff_pio_task, ata_sff_pio_task); |
Tejun Heo | 5fe7454 | 2010-05-10 21:41:37 +0200 | [diff] [blame] | 3315 | ap->ctl = ATA_DEVCTL_OBS; |
| 3316 | ap->last_ctl = 0xFF; |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3317 | } |
| 3318 | |
| 3319 | int __init ata_sff_init(void) |
| 3320 | { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3321 | /* |
| 3322 | * FIXME: In UP case, there is only one workqueue thread and if you |
| 3323 | * have more than one PIO device, latency is bloody awful, with |
| 3324 | * occasional multi-second "hiccups" as one PIO device waits for |
| 3325 | * another. It's an ugly wart that users DO occasionally complain |
| 3326 | * about; luckily most users have at most one PIO polled device. |
| 3327 | */ |
| 3328 | ata_sff_wq = create_workqueue("ata_sff"); |
| 3329 | if (!ata_sff_wq) |
| 3330 | return -ENOMEM; |
| 3331 | |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3332 | return 0; |
| 3333 | } |
| 3334 | |
| 3335 | void __exit ata_sff_exit(void) |
| 3336 | { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3337 | destroy_workqueue(ata_sff_wq); |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3338 | } |