Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * ATAPI support. |
| 3 | */ |
| 4 | |
| 5 | #include <linux/kernel.h> |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 6 | #include <linux/cdrom.h> |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 7 | #include <linux/delay.h> |
| 8 | #include <linux/ide.h> |
Geert Uytterhoeven | 479edf0 | 2009-03-31 20:14:57 +0200 | [diff] [blame] | 9 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 10 | #include <linux/gfp.h> |
Geert Uytterhoeven | 479edf0 | 2009-03-31 20:14:57 +0200 | [diff] [blame] | 11 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 12 | #include <scsi/scsi.h> |
| 13 | |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 14 | #define DRV_NAME "ide-atapi" |
| 15 | #define PFX DRV_NAME ": " |
| 16 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 17 | #ifdef DEBUG |
| 18 | #define debug_log(fmt, args...) \ |
| 19 | printk(KERN_INFO "ide: " fmt, ## args) |
| 20 | #else |
| 21 | #define debug_log(fmt, args...) do {} while (0) |
| 22 | #endif |
| 23 | |
Borislav Petkov | 8c66285 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 24 | #define ATAPI_MIN_CDB_BYTES 12 |
| 25 | |
Borislav Petkov | 991cb26 | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 26 | static inline int dev_is_idecd(ide_drive_t *drive) |
| 27 | { |
Borislav Petkov | 5317464 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 28 | return drive->media == ide_cdrom || drive->media == ide_optical; |
Borislav Petkov | 991cb26 | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 29 | } |
| 30 | |
Bartlomiej Zolnierkiewicz | 51509ee | 2008-10-10 22:39:34 +0200 | [diff] [blame] | 31 | /* |
| 32 | * Check whether we can support a device, |
| 33 | * based on the ATAPI IDENTIFY command results. |
| 34 | */ |
| 35 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) |
| 36 | { |
| 37 | u16 *id = drive->id; |
| 38 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; |
| 39 | |
| 40 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; |
| 41 | |
| 42 | protocol = (gcw[1] & 0xC0) >> 6; |
| 43 | device_type = gcw[1] & 0x1F; |
| 44 | removable = (gcw[0] & 0x80) >> 7; |
| 45 | drq_type = (gcw[0] & 0x60) >> 5; |
| 46 | packet_size = gcw[0] & 0x03; |
| 47 | |
| 48 | #ifdef CONFIG_PPC |
| 49 | /* kludge for Apple PowerBook internal zip */ |
| 50 | if (drive->media == ide_floppy && device_type == 5 && |
| 51 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && |
| 52 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) |
| 53 | device_type = 0; |
| 54 | #endif |
| 55 | |
| 56 | if (protocol != 2) |
| 57 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", |
| 58 | s, drive->name, protocol); |
| 59 | else if ((drive->media == ide_floppy && device_type != 0) || |
| 60 | (drive->media == ide_tape && device_type != 1)) |
| 61 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", |
| 62 | s, drive->name, device_type); |
| 63 | else if (removable == 0) |
| 64 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", |
| 65 | s, drive->name); |
| 66 | else if (drive->media == ide_floppy && drq_type == 3) |
| 67 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " |
| 68 | "supported\n", s, drive->name, drq_type); |
| 69 | else if (packet_size != 0) |
| 70 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " |
| 71 | "bytes\n", s, drive->name, packet_size); |
| 72 | else |
| 73 | return 1; |
| 74 | return 0; |
| 75 | } |
| 76 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); |
| 77 | |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 78 | void ide_init_pc(struct ide_atapi_pc *pc) |
| 79 | { |
| 80 | memset(pc, 0, sizeof(*pc)); |
Bartlomiej Zolnierkiewicz | 7bf7420 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 81 | } |
| 82 | EXPORT_SYMBOL_GPL(ide_init_pc); |
| 83 | |
Bartlomiej Zolnierkiewicz | 7645c15 | 2008-10-10 22:39:37 +0200 | [diff] [blame] | 84 | /* |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 85 | * Add a special packet command request to the tail of the request queue, |
| 86 | * and wait for it to be serviced. |
| 87 | */ |
| 88 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, |
Borislav Petkov | b13345f | 2009-05-02 10:26:12 +0200 | [diff] [blame] | 89 | struct ide_atapi_pc *pc, void *buf, unsigned int bufflen) |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 90 | { |
| 91 | struct request *rq; |
| 92 | int error; |
| 93 | |
| 94 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| 95 | rq->cmd_type = REQ_TYPE_SPECIAL; |
Tejun Heo | c267cc1 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 96 | rq->special = (char *)pc; |
Borislav Petkov | 3eb76c1 | 2009-03-13 21:16:12 +0100 | [diff] [blame] | 97 | |
Borislav Petkov | b13345f | 2009-05-02 10:26:12 +0200 | [diff] [blame] | 98 | if (buf && bufflen) { |
| 99 | error = blk_rq_map_kern(drive->queue, rq, buf, bufflen, |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 100 | GFP_NOIO); |
| 101 | if (error) |
| 102 | goto put_req; |
Borislav Petkov | 3eb76c1 | 2009-03-13 21:16:12 +0100 | [diff] [blame] | 103 | } |
| 104 | |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 105 | memcpy(rq->cmd, pc->c, 12); |
| 106 | if (drive->media == ide_tape) |
| 107 | rq->cmd[13] = REQ_IDETAPE_PC1; |
| 108 | error = blk_execute_rq(drive->queue, disk, rq, 0); |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 109 | put_req: |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 110 | blk_put_request(rq); |
Bartlomiej Zolnierkiewicz | 2ac07d9 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 111 | return error; |
| 112 | } |
| 113 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); |
| 114 | |
Bartlomiej Zolnierkiewicz | de699ad | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 115 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
| 116 | { |
| 117 | struct ide_atapi_pc pc; |
| 118 | |
| 119 | ide_init_pc(&pc); |
| 120 | pc.c[0] = TEST_UNIT_READY; |
| 121 | |
Borislav Petkov | b13345f | 2009-05-02 10:26:12 +0200 | [diff] [blame] | 122 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
Bartlomiej Zolnierkiewicz | de699ad | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 123 | } |
| 124 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); |
| 125 | |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 126 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
| 127 | { |
| 128 | struct ide_atapi_pc pc; |
| 129 | |
| 130 | ide_init_pc(&pc); |
| 131 | pc.c[0] = START_STOP; |
| 132 | pc.c[4] = start; |
| 133 | |
| 134 | if (drive->media == ide_tape) |
| 135 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; |
| 136 | |
Borislav Petkov | b13345f | 2009-05-02 10:26:12 +0200 | [diff] [blame] | 137 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
Bartlomiej Zolnierkiewicz | 0c8a6c7 | 2008-10-10 22:39:39 +0200 | [diff] [blame] | 138 | } |
| 139 | EXPORT_SYMBOL_GPL(ide_do_start_stop); |
| 140 | |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 141 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
| 142 | { |
| 143 | struct ide_atapi_pc pc; |
| 144 | |
Bartlomiej Zolnierkiewicz | 42619d3 | 2008-10-17 18:09:11 +0200 | [diff] [blame] | 145 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 146 | return 0; |
| 147 | |
| 148 | ide_init_pc(&pc); |
| 149 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; |
| 150 | pc.c[4] = on; |
| 151 | |
Borislav Petkov | b13345f | 2009-05-02 10:26:12 +0200 | [diff] [blame] | 152 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
Bartlomiej Zolnierkiewicz | 0578042 | 2008-10-10 22:39:38 +0200 | [diff] [blame] | 153 | } |
| 154 | EXPORT_SYMBOL_GPL(ide_set_media_lock); |
| 155 | |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 156 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
| 157 | { |
| 158 | ide_init_pc(pc); |
| 159 | pc->c[0] = REQUEST_SENSE; |
| 160 | if (drive->media == ide_floppy) { |
| 161 | pc->c[4] = 255; |
| 162 | pc->req_xfer = 18; |
| 163 | } else { |
| 164 | pc->c[4] = 20; |
| 165 | pc->req_xfer = 20; |
| 166 | } |
| 167 | } |
| 168 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); |
| 169 | |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 170 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
| 171 | { |
| 172 | struct request_sense *sense = &drive->sense_data; |
| 173 | struct request *sense_rq = &drive->sense_rq; |
| 174 | unsigned int cmd_len, sense_len; |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 175 | int err; |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 176 | |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 177 | switch (drive->media) { |
| 178 | case ide_floppy: |
| 179 | cmd_len = 255; |
| 180 | sense_len = 18; |
| 181 | break; |
| 182 | case ide_tape: |
| 183 | cmd_len = 20; |
| 184 | sense_len = 20; |
| 185 | break; |
| 186 | default: |
| 187 | cmd_len = 18; |
| 188 | sense_len = 18; |
| 189 | } |
| 190 | |
| 191 | BUG_ON(sense_len > sizeof(*sense)); |
| 192 | |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 193 | if (rq->cmd_type == REQ_TYPE_SENSE || drive->sense_rq_armed) |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 194 | return; |
| 195 | |
| 196 | memset(sense, 0, sizeof(*sense)); |
| 197 | |
| 198 | blk_rq_init(rq->q, sense_rq); |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 199 | |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 200 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
| 201 | GFP_NOIO); |
| 202 | if (unlikely(err)) { |
| 203 | if (printk_ratelimit()) |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 204 | printk(KERN_WARNING PFX "%s: failed to map sense " |
| 205 | "buffer\n", drive->name); |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 206 | return; |
| 207 | } |
| 208 | |
| 209 | sense_rq->rq_disk = rq->rq_disk; |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 210 | sense_rq->cmd[0] = GPCMD_REQUEST_SENSE; |
| 211 | sense_rq->cmd[4] = cmd_len; |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 212 | sense_rq->cmd_type = REQ_TYPE_SENSE; |
| 213 | sense_rq->cmd_flags |= REQ_PREEMPT; |
| 214 | |
| 215 | if (drive->media == ide_tape) |
| 216 | sense_rq->cmd[13] = REQ_IDETAPE_PC1; |
| 217 | |
| 218 | drive->sense_rq_armed = true; |
| 219 | } |
| 220 | EXPORT_SYMBOL_GPL(ide_prep_sense); |
| 221 | |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 222 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 223 | { |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 224 | /* deferred failure from ide_prep_sense() */ |
| 225 | if (!drive->sense_rq_armed) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 226 | printk(KERN_WARNING PFX "%s: error queuing a sense request\n", |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 227 | drive->name); |
| 228 | return -ENOMEM; |
| 229 | } |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 230 | |
| 231 | drive->sense_rq.special = special; |
| 232 | drive->sense_rq_armed = false; |
| 233 | |
| 234 | drive->hwif->rq = NULL; |
| 235 | |
| 236 | elv_add_request(drive->queue, &drive->sense_rq, |
| 237 | ELEVATOR_INSERT_FRONT, 0); |
Tejun Heo | 5c4be57 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 238 | return 0; |
Borislav Petkov | a1df516 | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 239 | } |
| 240 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); |
| 241 | |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 242 | /* |
| 243 | * Called when an error was detected during the last packet command. |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 244 | * We queue a request sense packet command at the head of the request |
| 245 | * queue. |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 246 | */ |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 247 | void ide_retry_pc(ide_drive_t *drive) |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 248 | { |
Tejun Heo | 8f6205c | 2009-05-08 11:53:59 +0900 | [diff] [blame] | 249 | struct request *failed_rq = drive->hwif->rq; |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 250 | struct request *sense_rq = &drive->sense_rq; |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 251 | struct ide_atapi_pc *pc = &drive->request_sense_pc; |
| 252 | |
| 253 | (void)ide_read_error(drive); |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 254 | |
| 255 | /* init pc from sense_rq */ |
| 256 | ide_init_pc(pc); |
| 257 | memcpy(pc->c, sense_rq->cmd, 12); |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 258 | |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 259 | if (drive->media == ide_tape) |
Borislav Petkov | 626542c | 2009-06-07 15:37:05 +0200 | [diff] [blame] | 260 | drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC; |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 261 | |
Tejun Heo | 8f6205c | 2009-05-08 11:53:59 +0900 | [diff] [blame] | 262 | /* |
| 263 | * Push back the failed request and put request sense on top |
| 264 | * of it. The failed command will be retried after sense data |
| 265 | * is acquired. |
| 266 | */ |
Tejun Heo | 8f6205c | 2009-05-08 11:53:59 +0900 | [diff] [blame] | 267 | drive->hwif->rq = NULL; |
Herbert Xu | 1af1850 | 2010-03-31 20:13:39 +0000 | [diff] [blame] | 268 | ide_requeue_and_plug(drive, failed_rq); |
Tejun Heo | 8f6205c | 2009-05-08 11:53:59 +0900 | [diff] [blame] | 269 | if (ide_queue_sense_rq(drive, pc)) { |
Tejun Heo | 9934c8c | 2009-05-08 11:54:16 +0900 | [diff] [blame] | 270 | blk_start_request(failed_rq); |
Tejun Heo | 8f6205c | 2009-05-08 11:53:59 +0900 | [diff] [blame] | 271 | ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq)); |
| 272 | } |
Bartlomiej Zolnierkiewicz | 6b0da28 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 273 | } |
| 274 | EXPORT_SYMBOL_GPL(ide_retry_pc); |
| 275 | |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 276 | int ide_cd_expiry(ide_drive_t *drive) |
| 277 | { |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 278 | struct request *rq = drive->hwif->rq; |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 279 | unsigned long wait = 0; |
| 280 | |
| 281 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); |
| 282 | |
| 283 | /* |
| 284 | * Some commands are *slow* and normally take a long time to complete. |
| 285 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all |
| 286 | * commands/drives support that. Let ide_timer_expiry keep polling us |
| 287 | * for these. |
| 288 | */ |
| 289 | switch (rq->cmd[0]) { |
| 290 | case GPCMD_BLANK: |
| 291 | case GPCMD_FORMAT_UNIT: |
| 292 | case GPCMD_RESERVE_RZONE_TRACK: |
| 293 | case GPCMD_CLOSE_TRACK: |
| 294 | case GPCMD_FLUSH_CACHE: |
| 295 | wait = ATAPI_WAIT_PC; |
| 296 | break; |
| 297 | default: |
| 298 | if (!(rq->cmd_flags & REQ_QUIET)) |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 299 | printk(KERN_INFO PFX "cmd 0x%x timed out\n", |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 300 | rq->cmd[0]); |
| 301 | wait = 0; |
| 302 | break; |
| 303 | } |
| 304 | return wait; |
| 305 | } |
| 306 | EXPORT_SYMBOL_GPL(ide_cd_expiry); |
| 307 | |
Borislav Petkov | 392de1d | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 308 | int ide_cd_get_xferlen(struct request *rq) |
| 309 | { |
Christoph Hellwig | 4c4762d | 2010-06-19 17:26:47 +0200 | [diff] [blame] | 310 | switch (rq->cmd_type) { |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 311 | case REQ_TYPE_FS: |
Borislav Petkov | 392de1d | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 312 | return 32768; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 313 | case REQ_TYPE_SENSE: |
| 314 | case REQ_TYPE_BLOCK_PC: |
| 315 | case REQ_TYPE_ATA_PC: |
Tejun Heo | 34b7d2c | 2009-05-07 22:24:43 +0900 | [diff] [blame] | 316 | return blk_rq_bytes(rq); |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 317 | default: |
Borislav Petkov | 392de1d | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 318 | return 0; |
Christoph Hellwig | 33659eb | 2010-08-07 18:17:56 +0200 | [diff] [blame] | 319 | } |
Borislav Petkov | 392de1d | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 320 | } |
| 321 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); |
| 322 | |
Bartlomiej Zolnierkiewicz | 0d6a975 | 2009-03-24 23:22:46 +0100 | [diff] [blame] | 323 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
| 324 | { |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 325 | struct ide_taskfile tf; |
Bartlomiej Zolnierkiewicz | 0d6a975 | 2009-03-24 23:22:46 +0100 | [diff] [blame] | 326 | |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 327 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
| 328 | IDE_VALID_LBAM | IDE_VALID_LBAH); |
Bartlomiej Zolnierkiewicz | 0d6a975 | 2009-03-24 23:22:46 +0100 | [diff] [blame] | 329 | |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 330 | *bcount = (tf.lbah << 8) | tf.lbam; |
| 331 | *ireason = tf.nsect & 3; |
Bartlomiej Zolnierkiewicz | 0d6a975 | 2009-03-24 23:22:46 +0100 | [diff] [blame] | 332 | } |
| 333 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); |
| 334 | |
Bartlomiej Zolnierkiewicz | aa5d2de7 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 335 | /* |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 336 | * Check the contents of the interrupt reason register and attempt to recover if |
| 337 | * there are problems. |
| 338 | * |
| 339 | * Returns: |
| 340 | * - 0 if everything's ok |
| 341 | * - 1 if the request has to be terminated. |
| 342 | */ |
| 343 | int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len, |
| 344 | int ireason, int rw) |
| 345 | { |
| 346 | ide_hwif_t *hwif = drive->hwif; |
| 347 | |
| 348 | debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw); |
| 349 | |
| 350 | if (ireason == (!rw << 1)) |
| 351 | return 0; |
| 352 | else if (ireason == (rw << 1)) { |
| 353 | printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", |
| 354 | drive->name, __func__); |
| 355 | |
| 356 | if (dev_is_idecd(drive)) |
| 357 | ide_pad_transfer(drive, rw, len); |
| 358 | } else if (!rw && ireason == ATAPI_COD) { |
| 359 | if (dev_is_idecd(drive)) { |
| 360 | /* |
| 361 | * Some drives (ASUS) seem to tell us that status info |
| 362 | * is available. Just get it and ignore. |
| 363 | */ |
| 364 | (void)hwif->tp_ops->read_status(hwif); |
| 365 | return 0; |
| 366 | } |
| 367 | } else { |
| 368 | if (ireason & ATAPI_COD) |
| 369 | printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name, |
| 370 | __func__); |
| 371 | |
| 372 | /* drive wants a command packet, or invalid ireason... */ |
| 373 | printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", |
| 374 | drive->name, __func__, ireason); |
| 375 | } |
| 376 | |
| 377 | if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC) |
| 378 | rq->cmd_flags |= REQ_FAILED; |
| 379 | |
| 380 | return 1; |
| 381 | } |
| 382 | EXPORT_SYMBOL_GPL(ide_check_ireason); |
| 383 | |
| 384 | /* |
Bartlomiej Zolnierkiewicz | aa5d2de7 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 385 | * This is the usual interrupt handler which will be called during a packet |
| 386 | * command. We will transfer some of the data (as requested by the drive) |
| 387 | * and will re-point interrupt handler to us. |
| 388 | */ |
| 389 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 390 | { |
Bartlomiej Zolnierkiewicz | 2b9efba | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 391 | struct ide_atapi_pc *pc = drive->pc; |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 392 | ide_hwif_t *hwif = drive->hwif; |
Bartlomiej Zolnierkiewicz | f094d4d8 | 2009-03-31 20:15:24 +0200 | [diff] [blame] | 393 | struct ide_cmd *cmd = &hwif->cmd; |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 394 | struct request *rq = hwif->rq; |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 395 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 396 | unsigned int timeout, done; |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 397 | u16 bcount; |
Borislav Petkov | 5d655a0 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 398 | u8 stat, ireason, dsc = 0; |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 399 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 400 | |
| 401 | debug_log("Enter %s - interrupt handler\n", __func__); |
| 402 | |
Borislav Petkov | 5d655a0 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 403 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
| 404 | : WAIT_TAPE_CMD; |
Bartlomiej Zolnierkiewicz | 844b946 | 2008-10-13 21:39:31 +0200 | [diff] [blame] | 405 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 406 | /* Clear the interrupt */ |
Bartlomiej Zolnierkiewicz | 374e042 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 407 | stat = tp_ops->read_status(hwif); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 408 | |
| 409 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
Bartlomiej Zolnierkiewicz | 88b4132 | 2009-03-31 20:15:22 +0200 | [diff] [blame] | 410 | int rc; |
Bartlomiej Zolnierkiewicz | 4453011 | 2009-03-31 20:15:20 +0200 | [diff] [blame] | 411 | |
Bartlomiej Zolnierkiewicz | 88b4132 | 2009-03-31 20:15:22 +0200 | [diff] [blame] | 412 | drive->waiting_for_dma = 0; |
| 413 | rc = hwif->dma_ops->dma_end(drive); |
Bartlomiej Zolnierkiewicz | f094d4d8 | 2009-03-31 20:15:24 +0200 | [diff] [blame] | 414 | ide_dma_unmap_sg(drive, cmd); |
Bartlomiej Zolnierkiewicz | 4453011 | 2009-03-31 20:15:20 +0200 | [diff] [blame] | 415 | |
| 416 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { |
Borislav Petkov | 5d655a0 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 417 | if (drive->media == ide_floppy) |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 418 | printk(KERN_ERR PFX "%s: DMA %s error\n", |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 419 | drive->name, rq_data_dir(pc->rq) |
| 420 | ? "write" : "read"); |
| 421 | pc->flags |= PC_FLAG_DMA_ERROR; |
Tejun Heo | 6d70038 | 2009-04-19 08:46:03 +0900 | [diff] [blame] | 422 | } else |
Borislav Petkov | 077e6db | 2009-05-01 21:21:02 +0200 | [diff] [blame] | 423 | rq->resid_len = 0; |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 424 | debug_log("%s: DMA finished\n", drive->name); |
| 425 | } |
| 426 | |
| 427 | /* No more interrupts */ |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 428 | if ((stat & ATA_DRQ) == 0) { |
Borislav Petkov | 5b6c942 | 2009-03-31 20:15:34 +0200 | [diff] [blame] | 429 | int uptodate, error; |
Bartlomiej Zolnierkiewicz | 03a2faa | 2009-03-27 12:46:36 +0100 | [diff] [blame] | 430 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 431 | debug_log("Packet command completed, %d bytes transferred\n", |
Borislav Petkov | 077e6db | 2009-05-01 21:21:02 +0200 | [diff] [blame] | 432 | blk_rq_bytes(rq)); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 433 | |
| 434 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; |
| 435 | |
| 436 | local_irq_enable_in_hardirq(); |
| 437 | |
Borislav Petkov | 5d655a0 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 438 | if (drive->media == ide_tape && |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 439 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
| 440 | stat &= ~ATA_ERR; |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 441 | |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 442 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 443 | /* Error detected */ |
| 444 | debug_log("%s: I/O error\n", drive->name); |
| 445 | |
Borislav Petkov | 5d655a0 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 446 | if (drive->media != ide_tape) |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 447 | pc->rq->errors++; |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 448 | |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 449 | if (rq->cmd[0] == REQUEST_SENSE) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 450 | printk(KERN_ERR PFX "%s: I/O error in request " |
| 451 | "sense command\n", drive->name); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 452 | return ide_do_reset(drive); |
| 453 | } |
| 454 | |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 455 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 456 | |
| 457 | /* Retry operation */ |
Borislav Petkov | 6b544fc | 2009-04-19 07:00:42 +0900 | [diff] [blame] | 458 | ide_retry_pc(drive); |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 459 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 460 | /* queued, but not started */ |
| 461 | return ide_stopped; |
| 462 | } |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 463 | pc->error = 0; |
Bartlomiej Zolnierkiewicz | b14c721 | 2008-10-13 21:39:30 +0200 | [diff] [blame] | 464 | |
| 465 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) |
| 466 | dsc = 1; |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 467 | |
Tejun Heo | b3071d1 | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 468 | /* |
| 469 | * ->pc_callback() might change rq->data_len for |
| 470 | * residual count, cache total length. |
| 471 | */ |
Tejun Heo | 21d9c5d | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 472 | done = blk_rq_bytes(rq); |
Tejun Heo | b3071d1 | 2009-04-19 08:46:02 +0900 | [diff] [blame] | 473 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 474 | /* Command finished - Call the callback function */ |
Bartlomiej Zolnierkiewicz | 03a2faa | 2009-03-27 12:46:36 +0100 | [diff] [blame] | 475 | uptodate = drive->pc_callback(drive, dsc); |
| 476 | |
| 477 | if (uptodate == 0) |
| 478 | drive->failed_pc = NULL; |
| 479 | |
Christoph Hellwig | 4c4762d | 2010-06-19 17:26:47 +0200 | [diff] [blame] | 480 | if (rq->cmd_type == REQ_TYPE_SPECIAL) { |
Bartlomiej Zolnierkiewicz | 6902a53 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 481 | rq->errors = 0; |
Borislav Petkov | 5b6c942 | 2009-03-31 20:15:34 +0200 | [diff] [blame] | 482 | error = 0; |
Bartlomiej Zolnierkiewicz | 89f78b3 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 483 | } else { |
Bartlomiej Zolnierkiewicz | 349d12a | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 484 | |
Christoph Hellwig | 4c4762d | 2010-06-19 17:26:47 +0200 | [diff] [blame] | 485 | if (rq->cmd_type != REQ_TYPE_FS && uptodate <= 0) { |
Bartlomiej Zolnierkiewicz | 89f78b3 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 486 | if (rq->errors == 0) |
| 487 | rq->errors = -EIO; |
| 488 | } |
Bartlomiej Zolnierkiewicz | 349d12a | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 489 | |
Borislav Petkov | 5b6c942 | 2009-03-31 20:15:34 +0200 | [diff] [blame] | 490 | error = uptodate ? 0 : -EIO; |
Bartlomiej Zolnierkiewicz | 89f78b3 | 2009-03-27 12:46:43 +0100 | [diff] [blame] | 491 | } |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 492 | |
Tejun Heo | c3a4d78 | 2009-05-07 22:24:37 +0900 | [diff] [blame] | 493 | ide_complete_rq(drive, error, blk_rq_bytes(rq)); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 494 | return ide_stopped; |
| 495 | } |
| 496 | |
| 497 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
| 498 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 499 | printk(KERN_ERR PFX "%s: The device wants to issue more " |
| 500 | "interrupts in DMA mode\n", drive->name); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 501 | ide_dma_off(drive); |
| 502 | return ide_do_reset(drive); |
| 503 | } |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 504 | |
Bartlomiej Zolnierkiewicz | 1823649 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 505 | /* Get the number of bytes to transfer on this interrupt. */ |
| 506 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 507 | |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 508 | if (ide_check_ireason(drive, rq, bcount, ireason, write)) |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 509 | return ide_do_reset(drive); |
Borislav Petkov | 8fccf89 | 2008-07-23 19:56:01 +0200 | [diff] [blame] | 510 | |
Tejun Heo | 6d70038 | 2009-04-19 08:46:03 +0900 | [diff] [blame] | 511 | done = min_t(unsigned int, bcount, cmd->nleft); |
| 512 | ide_pio_bytes(drive, cmd, write, done); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 513 | |
Tejun Heo | 6d70038 | 2009-04-19 08:46:03 +0900 | [diff] [blame] | 514 | /* Update transferred byte count */ |
Borislav Petkov | 077e6db | 2009-05-01 21:21:02 +0200 | [diff] [blame] | 515 | rq->resid_len -= done; |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 516 | |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 517 | bcount -= done; |
| 518 | |
| 519 | if (bcount) |
| 520 | ide_pad_transfer(drive, write, bcount); |
| 521 | |
Borislav Petkov | 077e6db | 2009-05-01 21:21:02 +0200 | [diff] [blame] | 522 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n", |
| 523 | rq->cmd[0], done, bcount, rq->resid_len); |
Bartlomiej Zolnierkiewicz | d93bc45 | 2009-03-31 20:15:26 +0200 | [diff] [blame] | 524 | |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 525 | /* And set the interrupt handler again */ |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 526 | ide_set_handler(drive, ide_pc_intr, timeout); |
Bartlomiej Zolnierkiewicz | 646c0cb | 2008-07-15 21:22:03 +0200 | [diff] [blame] | 527 | return ide_started; |
| 528 | } |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 529 | |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 530 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 531 | u16 bcount, u8 dma) |
Bartlomiej Zolnierkiewicz | 7a254df | 2009-03-24 23:22:39 +0100 | [diff] [blame] | 532 | { |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 533 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
| 534 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | |
| 535 | IDE_VALID_FEATURE | valid_tf; |
Bartlomiej Zolnierkiewicz | 35b5d0b | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 536 | cmd->tf.command = ATA_CMD_PACKET; |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 537 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
| 538 | cmd->tf.lbam = bcount & 0xff; |
| 539 | cmd->tf.lbah = (bcount >> 8) & 0xff; |
Bartlomiej Zolnierkiewicz | 7a254df | 2009-03-24 23:22:39 +0100 | [diff] [blame] | 540 | } |
| 541 | |
Bartlomiej Zolnierkiewicz | 88a7210 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 542 | static u8 ide_read_ireason(ide_drive_t *drive) |
| 543 | { |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 544 | struct ide_taskfile tf; |
Bartlomiej Zolnierkiewicz | 88a7210 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 545 | |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 546 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
Bartlomiej Zolnierkiewicz | 88a7210 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 547 | |
Sergei Shtylyov | 3153c26 | 2009-04-08 14:13:03 +0200 | [diff] [blame] | 548 | return tf.nsect & 3; |
Bartlomiej Zolnierkiewicz | 88a7210 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 549 | } |
| 550 | |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 551 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
| 552 | { |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 553 | int retries = 100; |
| 554 | |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 555 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
| 556 | (ireason & ATAPI_IO))) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 557 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing " |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 558 | "a packet command, retrying\n", drive->name); |
| 559 | udelay(100); |
Bartlomiej Zolnierkiewicz | 88a7210 | 2008-07-23 19:55:54 +0200 | [diff] [blame] | 560 | ireason = ide_read_ireason(drive); |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 561 | if (retries == 0) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 562 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing" |
| 563 | " a packet command, ignoring\n", |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 564 | drive->name); |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 565 | ireason |= ATAPI_COD; |
| 566 | ireason &= ~ATAPI_IO; |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 567 | } |
| 568 | } |
| 569 | |
| 570 | return ireason; |
| 571 | } |
| 572 | |
Bartlomiej Zolnierkiewicz | baf08f0 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 573 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
| 574 | { |
| 575 | /* Send the actual packet */ |
| 576 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); |
| 577 | |
| 578 | /* Timeout for the packet command */ |
| 579 | return WAIT_FLOPPY_CMD; |
| 580 | } |
| 581 | |
| 582 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 583 | { |
Borislav Petkov | b16aabc | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 584 | struct ide_atapi_pc *uninitialized_var(pc); |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 585 | ide_hwif_t *hwif = drive->hwif; |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 586 | struct request *rq = hwif->rq; |
Bartlomiej Zolnierkiewicz | baf08f0 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 587 | ide_expiry_t *expiry; |
| 588 | unsigned int timeout; |
Borislav Petkov | 8c66285 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 589 | int cmd_len; |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 590 | ide_startstop_t startstop; |
| 591 | u8 ireason; |
| 592 | |
Bartlomiej Zolnierkiewicz | 3a7d248 | 2008-10-10 22:39:21 +0200 | [diff] [blame] | 593 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 594 | printk(KERN_ERR PFX "%s: Strange, packet command initiated yet " |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 595 | "DRQ isn't asserted\n", drive->name); |
| 596 | return startstop; |
| 597 | } |
| 598 | |
Borislav Petkov | 5f25843 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 599 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
| 600 | if (drive->dma) |
| 601 | drive->waiting_for_dma = 1; |
| 602 | } |
| 603 | |
Borislav Petkov | 8c66285 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 604 | if (dev_is_idecd(drive)) { |
| 605 | /* ATAPI commands get padded out to 12 bytes minimum */ |
| 606 | cmd_len = COMMAND_SIZE(rq->cmd[0]); |
| 607 | if (cmd_len < ATAPI_MIN_CDB_BYTES) |
| 608 | cmd_len = ATAPI_MIN_CDB_BYTES; |
Borislav Petkov | def860d | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 609 | |
| 610 | timeout = rq->timeout; |
| 611 | expiry = ide_cd_expiry; |
| 612 | } else { |
Borislav Petkov | b16aabc | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 613 | pc = drive->pc; |
| 614 | |
Borislav Petkov | 8c66285 | 2009-01-02 16:12:54 +0100 | [diff] [blame] | 615 | cmd_len = ATAPI_MIN_CDB_BYTES; |
| 616 | |
Borislav Petkov | def860d | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 617 | /* |
| 618 | * If necessary schedule the packet transfer to occur 'timeout' |
Martin Olsson | 19af5cd | 2009-04-23 11:37:37 +0200 | [diff] [blame] | 619 | * milliseconds later in ide_delayed_transfer_pc() after the |
Borislav Petkov | def860d | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 620 | * device says it's ready for a packet. |
| 621 | */ |
| 622 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { |
| 623 | timeout = drive->pc_delay; |
| 624 | expiry = &ide_delayed_transfer_pc; |
| 625 | } else { |
| 626 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
| 627 | : WAIT_TAPE_CMD; |
| 628 | expiry = NULL; |
| 629 | } |
Borislav Petkov | 06cc277 | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 630 | |
| 631 | ireason = ide_read_ireason(drive); |
| 632 | if (drive->media == ide_tape) |
| 633 | ireason = ide_wait_ireason(drive, ireason); |
| 634 | |
| 635 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { |
Borislav Petkov | 103f703 | 2009-04-26 10:39:07 +0200 | [diff] [blame] | 636 | printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while " |
| 637 | "issuing a packet command\n", drive->name); |
Borislav Petkov | 06cc277 | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 638 | |
| 639 | return ide_do_reset(drive); |
| 640 | } |
Bartlomiej Zolnierkiewicz | baf08f0 | 2008-10-13 21:39:32 +0200 | [diff] [blame] | 641 | } |
| 642 | |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 643 | hwif->expiry = expiry; |
| 644 | |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 645 | /* Set the interrupt routine */ |
Borislav Petkov | d6251d4 | 2009-01-06 17:20:58 +0100 | [diff] [blame] | 646 | ide_set_handler(drive, |
| 647 | (dev_is_idecd(drive) ? drive->irq_handler |
| 648 | : ide_pc_intr), |
Bartlomiej Zolnierkiewicz | 60c0cd0 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 649 | timeout); |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 650 | |
Borislav Petkov | 2eba082 | 2009-03-31 20:14:58 +0200 | [diff] [blame] | 651 | /* Send the actual packet */ |
| 652 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) |
| 653 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); |
| 654 | |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 655 | /* Begin DMA, if necessary */ |
Borislav Petkov | b16aabc | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 656 | if (dev_is_idecd(drive)) { |
| 657 | if (drive->dma) |
| 658 | hwif->dma_ops->dma_start(drive); |
| 659 | } else { |
| 660 | if (pc->flags & PC_FLAG_DMA_OK) { |
| 661 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; |
| 662 | hwif->dma_ops->dma_start(drive); |
| 663 | } |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 664 | } |
| 665 | |
Bartlomiej Zolnierkiewicz | 594c16d | 2008-07-15 21:21:58 +0200 | [diff] [blame] | 666 | return ide_started; |
| 667 | } |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 668 | |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 669 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 670 | { |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 671 | struct ide_atapi_pc *pc; |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 672 | ide_hwif_t *hwif = drive->hwif; |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 673 | ide_expiry_t *expiry = NULL; |
Bartlomiej Zolnierkiewicz | e6830a8 | 2009-03-27 12:46:37 +0100 | [diff] [blame] | 674 | struct request *rq = hwif->rq; |
Borislav Petkov | dfb7e62 | 2009-05-01 20:35:21 +0200 | [diff] [blame] | 675 | unsigned int timeout, bytes; |
Borislav Petkov | 392de1d | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 676 | u16 bcount; |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 677 | u8 valid_tf; |
Bartlomiej Zolnierkiewicz | 35b5d0b | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 678 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 679 | |
Borislav Petkov | ed48554 | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 680 | if (dev_is_idecd(drive)) { |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 681 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
Bartlomiej Zolnierkiewicz | e6830a8 | 2009-03-27 12:46:37 +0100 | [diff] [blame] | 682 | bcount = ide_cd_get_xferlen(rq); |
Borislav Petkov | 4cad085 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 683 | expiry = ide_cd_expiry; |
Borislav Petkov | 28ad91d | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 684 | timeout = ATAPI_WAIT_PC; |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 685 | |
Bartlomiej Zolnierkiewicz | 5ae5412 | 2009-03-31 20:15:20 +0200 | [diff] [blame] | 686 | if (drive->dma) |
| 687 | drive->dma = !ide_dma_prepare(drive, cmd); |
Borislav Petkov | ed48554 | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 688 | } else { |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 689 | pc = drive->pc; |
| 690 | |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 691 | valid_tf = IDE_VALID_DEVICE; |
Borislav Petkov | dfb7e62 | 2009-05-01 20:35:21 +0200 | [diff] [blame] | 692 | bytes = blk_rq_bytes(rq); |
Borislav Petkov | dfb7e62 | 2009-05-01 20:35:21 +0200 | [diff] [blame] | 693 | bcount = ((drive->media == ide_tape) ? bytes |
| 694 | : min_t(unsigned int, |
| 695 | bytes, 63 * 1024)); |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 696 | |
Borislav Petkov | 077e6db | 2009-05-01 21:21:02 +0200 | [diff] [blame] | 697 | /* We haven't transferred any data yet */ |
| 698 | rq->resid_len = bcount; |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 699 | |
| 700 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
| 701 | pc->flags &= ~PC_FLAG_DMA_ERROR; |
| 702 | ide_dma_off(drive); |
| 703 | } |
| 704 | |
Bartlomiej Zolnierkiewicz | 5ae5412 | 2009-03-31 20:15:20 +0200 | [diff] [blame] | 705 | if (pc->flags & PC_FLAG_DMA_OK) |
| 706 | drive->dma = !ide_dma_prepare(drive, cmd); |
Borislav Petkov | d77612a | 2009-01-02 16:12:55 +0100 | [diff] [blame] | 707 | |
| 708 | if (!drive->dma) |
| 709 | pc->flags &= ~PC_FLAG_DMA_OK; |
Borislav Petkov | 28ad91d | 2009-01-02 16:12:56 +0100 | [diff] [blame] | 710 | |
| 711 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
| 712 | : WAIT_TAPE_CMD; |
Borislav Petkov | ed48554 | 2009-01-02 16:12:52 +0100 | [diff] [blame] | 713 | } |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 714 | |
Sergei Shtylyov | 60f8501 | 2009-04-08 14:13:01 +0200 | [diff] [blame] | 715 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
Bartlomiej Zolnierkiewicz | b788ee9 | 2009-03-27 12:46:46 +0100 | [diff] [blame] | 716 | |
| 717 | (void)do_rw_taskfile(drive, cmd); |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 718 | |
Bartlomiej Zolnierkiewicz | 35b5d0b | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 719 | if (drq_int) { |
Borislav Petkov | 5f25843 | 2009-01-02 16:12:53 +0100 | [diff] [blame] | 720 | if (drive->dma) |
| 721 | drive->waiting_for_dma = 0; |
Bartlomiej Zolnierkiewicz | 22117d6 | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 722 | hwif->expiry = expiry; |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 723 | } |
Bartlomiej Zolnierkiewicz | 35b5d0b | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 724 | |
| 725 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); |
| 726 | |
| 727 | return drq_int ? ide_started : ide_transfer_pc(drive); |
Bartlomiej Zolnierkiewicz | 6bf1641 | 2008-07-15 21:22:00 +0200 | [diff] [blame] | 728 | } |
| 729 | EXPORT_SYMBOL_GPL(ide_issue_pc); |