Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jeff Garzik | af36d7f | 2005-08-28 20:18:39 -0400 | [diff] [blame] | 2 | * libata-scsi.c - helper library for ATA |
| 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. |
| 9 | * Copyright 2003-2004 Jeff Garzik |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2, or (at your option) |
| 15 | * any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; see the file COPYING. If not, write to |
| 24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
| 26 | * |
| 27 | * libata documentation is available via 'make {ps|pdf}docs', |
| 28 | * as Documentation/DocBook/libata.* |
| 29 | * |
| 30 | * Hardware documentation available from |
| 31 | * - http://www.t10.org/ |
| 32 | * - http://www.t13.org/ |
| 33 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/blkdev.h> |
| 38 | #include <linux/spinlock.h> |
| 39 | #include <scsi/scsi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <scsi/scsi_host.h> |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 41 | #include <scsi/scsi_eh.h> |
Jeff Garzik | 005a5a0 | 2005-10-30 23:31:48 -0500 | [diff] [blame] | 42 | #include <scsi/scsi_device.h> |
Jeff Garzik | 193515d | 2005-11-07 00:59:37 -0500 | [diff] [blame] | 43 | #include <scsi/scsi_request.h> |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 44 | #include <scsi/scsi_tcq.h> |
Tejun Heo | 30afc84 | 2006-03-18 18:40:14 +0900 | [diff] [blame] | 45 | #include <scsi/scsi_transport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/libata.h> |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 47 | #include <linux/hdreg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <asm/uaccess.h> |
| 49 | |
| 50 | #include "libata.h" |
| 51 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 52 | #define SECTOR_SIZE 512 |
| 53 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 54 | typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); |
Tejun Heo | ab5b3a5 | 2006-05-31 18:27:34 +0900 | [diff] [blame] | 55 | |
| 56 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, |
| 57 | const struct scsi_device *scsidev); |
| 58 | static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, |
| 59 | const struct scsi_device *scsidev); |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame^] | 60 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
| 61 | unsigned int id, unsigned int lun); |
Tejun Heo | ab5b3a5 | 2006-05-31 18:27:34 +0900 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 64 | #define RW_RECOVERY_MPAGE 0x1 |
| 65 | #define RW_RECOVERY_MPAGE_LEN 12 |
| 66 | #define CACHE_MPAGE 0x8 |
| 67 | #define CACHE_MPAGE_LEN 20 |
| 68 | #define CONTROL_MPAGE 0xa |
| 69 | #define CONTROL_MPAGE_LEN 12 |
| 70 | #define ALL_MPAGES 0x3f |
| 71 | #define ALL_SUB_MPAGES 0xff |
| 72 | |
| 73 | |
| 74 | static const u8 def_rw_recovery_mpage[] = { |
| 75 | RW_RECOVERY_MPAGE, |
| 76 | RW_RECOVERY_MPAGE_LEN - 2, |
| 77 | (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */ |
| 78 | (1 << 6), /* ARRE (auto read reallocation) */ |
| 79 | 0, /* read retry count */ |
| 80 | 0, 0, 0, 0, |
| 81 | 0, /* write retry count */ |
| 82 | 0, 0, 0 |
| 83 | }; |
| 84 | |
| 85 | static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = { |
| 86 | CACHE_MPAGE, |
| 87 | CACHE_MPAGE_LEN - 2, |
| 88 | 0, /* contains WCE, needs to be 0 for logic */ |
| 89 | 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 90 | 0, /* contains DRA, needs to be 0 for logic */ |
| 91 | 0, 0, 0, 0, 0, 0, 0 |
| 92 | }; |
| 93 | |
| 94 | static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { |
| 95 | CONTROL_MPAGE, |
| 96 | CONTROL_MPAGE_LEN - 2, |
| 97 | 2, /* DSENSE=0, GLTSD=1 */ |
| 98 | 0, /* [QAM+QERR may be 1, see 05-359r1] */ |
| 99 | 0, 0, 0, 0, 0xff, 0xff, |
| 100 | 0, 30 /* extended self test time, see 05-359r1 */ |
| 101 | }; |
| 102 | |
Tejun Heo | 30afc84 | 2006-03-18 18:40:14 +0900 | [diff] [blame] | 103 | /* |
| 104 | * libata transport template. libata doesn't do real transport stuff. |
| 105 | * It just needs the eh_timed_out hook. |
| 106 | */ |
| 107 | struct scsi_transport_template ata_scsi_transport_template = { |
Christoph Hellwig | 9227c33 | 2006-04-01 19:21:04 +0200 | [diff] [blame] | 108 | .eh_strategy_handler = ata_scsi_error, |
Tejun Heo | 30afc84 | 2006-03-18 18:40:14 +0900 | [diff] [blame] | 109 | .eh_timed_out = ata_scsi_timed_out, |
| 110 | }; |
| 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 113 | static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, |
| 114 | void (*done)(struct scsi_cmnd *)) |
| 115 | { |
| 116 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); |
| 117 | /* "Invalid field in cbd" */ |
| 118 | done(cmd); |
| 119 | } |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /** |
| 122 | * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. |
| 123 | * @sdev: SCSI device for which BIOS geometry is to be determined |
| 124 | * @bdev: block device associated with @sdev |
| 125 | * @capacity: capacity of SCSI device |
| 126 | * @geom: location to which geometry will be output |
| 127 | * |
| 128 | * Generic bios head/sector/cylinder calculator |
| 129 | * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS) |
| 130 | * mapping. Some situations may arise where the disk is not |
| 131 | * bootable if this is not used. |
| 132 | * |
| 133 | * LOCKING: |
| 134 | * Defined by the SCSI layer. We don't really care. |
| 135 | * |
| 136 | * RETURNS: |
| 137 | * Zero. |
| 138 | */ |
| 139 | int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, |
| 140 | sector_t capacity, int geom[]) |
| 141 | { |
| 142 | geom[0] = 255; |
| 143 | geom[1] = 63; |
| 144 | sector_div(capacity, 255*63); |
| 145 | geom[2] = capacity; |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 150 | /** |
| 151 | * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 152 | * @scsidev: Device to which we are issuing command |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 153 | * @arg: User provided data for issuing command |
| 154 | * |
| 155 | * LOCKING: |
| 156 | * Defined by the SCSI layer. We don't really care. |
| 157 | * |
| 158 | * RETURNS: |
| 159 | * Zero on success, negative errno on error. |
| 160 | */ |
| 161 | |
| 162 | int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg) |
| 163 | { |
| 164 | int rc = 0; |
| 165 | u8 scsi_cmd[MAX_COMMAND_SIZE]; |
| 166 | u8 args[4], *argbuf = NULL; |
| 167 | int argsize = 0; |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 168 | struct scsi_sense_hdr sshdr; |
| 169 | enum dma_data_direction data_dir; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 170 | |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 171 | if (arg == NULL) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 172 | return -EINVAL; |
| 173 | |
| 174 | if (copy_from_user(args, arg, sizeof(args))) |
| 175 | return -EFAULT; |
| 176 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 177 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
| 178 | |
| 179 | if (args[3]) { |
| 180 | argsize = SECTOR_SIZE * args[3]; |
| 181 | argbuf = kmalloc(argsize, GFP_KERNEL); |
Jeff Raubitschek | 54dac83 | 2005-10-04 10:21:19 -0400 | [diff] [blame] | 182 | if (argbuf == NULL) { |
| 183 | rc = -ENOMEM; |
| 184 | goto error; |
| 185 | } |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 186 | |
| 187 | scsi_cmd[1] = (4 << 1); /* PIO Data-in */ |
| 188 | scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev, |
| 189 | block count in sector count field */ |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 190 | data_dir = DMA_FROM_DEVICE; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 191 | } else { |
| 192 | scsi_cmd[1] = (3 << 1); /* Non-data */ |
| 193 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 194 | data_dir = DMA_NONE; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | scsi_cmd[0] = ATA_16; |
| 198 | |
| 199 | scsi_cmd[4] = args[2]; |
| 200 | if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */ |
| 201 | scsi_cmd[6] = args[3]; |
| 202 | scsi_cmd[8] = args[1]; |
| 203 | scsi_cmd[10] = 0x4f; |
| 204 | scsi_cmd[12] = 0xc2; |
| 205 | } else { |
| 206 | scsi_cmd[6] = args[1]; |
| 207 | } |
| 208 | scsi_cmd[14] = args[0]; |
| 209 | |
| 210 | /* Good values for timeout and retries? Values below |
| 211 | from scsi_ioctl_send_command() for default case... */ |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 212 | if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize, |
| 213 | &sshdr, (10*HZ), 5)) { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 214 | rc = -EIO; |
| 215 | goto error; |
| 216 | } |
| 217 | |
| 218 | /* Need code to retrieve data from check condition? */ |
| 219 | |
| 220 | if ((argbuf) |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 221 | && copy_to_user(arg + sizeof(args), argbuf, argsize)) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 222 | rc = -EFAULT; |
| 223 | error: |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 224 | if (argbuf) |
| 225 | kfree(argbuf); |
| 226 | |
| 227 | return rc; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 232 | * @scsidev: Device to which we are issuing command |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 233 | * @arg: User provided data for issuing command |
| 234 | * |
| 235 | * LOCKING: |
| 236 | * Defined by the SCSI layer. We don't really care. |
| 237 | * |
| 238 | * RETURNS: |
| 239 | * Zero on success, negative errno on error. |
| 240 | */ |
| 241 | int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) |
| 242 | { |
| 243 | int rc = 0; |
| 244 | u8 scsi_cmd[MAX_COMMAND_SIZE]; |
| 245 | u8 args[7]; |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 246 | struct scsi_sense_hdr sshdr; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 247 | |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 248 | if (arg == NULL) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 249 | return -EINVAL; |
| 250 | |
| 251 | if (copy_from_user(args, arg, sizeof(args))) |
| 252 | return -EFAULT; |
| 253 | |
| 254 | memset(scsi_cmd, 0, sizeof(scsi_cmd)); |
| 255 | scsi_cmd[0] = ATA_16; |
| 256 | scsi_cmd[1] = (3 << 1); /* Non-data */ |
| 257 | /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ |
| 258 | scsi_cmd[4] = args[1]; |
| 259 | scsi_cmd[6] = args[2]; |
| 260 | scsi_cmd[8] = args[3]; |
| 261 | scsi_cmd[10] = args[4]; |
| 262 | scsi_cmd[12] = args[5]; |
| 263 | scsi_cmd[14] = args[0]; |
| 264 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 265 | /* Good values for timeout and retries? Values below |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 266 | from scsi_ioctl_send_command() for default case... */ |
Mike Christie | 85837eb | 2005-11-11 16:38:53 -0600 | [diff] [blame] | 267 | if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr, |
| 268 | (10*HZ), 5)) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 269 | rc = -EIO; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 270 | |
| 271 | /* Need code to retrieve data from check condition? */ |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 272 | return rc; |
| 273 | } |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) |
| 276 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | int val = -EINVAL, rc = -EINVAL; |
| 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | switch (cmd) { |
| 280 | case ATA_IOC_GET_IO32: |
| 281 | val = 0; |
| 282 | if (copy_to_user(arg, &val, 1)) |
| 283 | return -EFAULT; |
| 284 | return 0; |
| 285 | |
| 286 | case ATA_IOC_SET_IO32: |
| 287 | val = (unsigned long) arg; |
| 288 | if (val != 0) |
| 289 | return -EINVAL; |
| 290 | return 0; |
| 291 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 292 | case HDIO_DRIVE_CMD: |
| 293 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| 294 | return -EACCES; |
| 295 | return ata_cmd_ioctl(scsidev, arg); |
| 296 | |
| 297 | case HDIO_DRIVE_TASK: |
| 298 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| 299 | return -EACCES; |
| 300 | return ata_task_ioctl(scsidev, arg); |
| 301 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | default: |
| 303 | rc = -ENOTTY; |
| 304 | break; |
| 305 | } |
| 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | return rc; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * ata_scsi_qc_new - acquire new ata_queued_cmd reference |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | * @dev: ATA device to which the new command is attached |
| 313 | * @cmd: SCSI command that originated this ATA command |
| 314 | * @done: SCSI command completion function |
| 315 | * |
| 316 | * Obtain a reference to an unused ata_queued_cmd structure, |
| 317 | * which is the basic libata structure representing a single |
| 318 | * ATA command sent to the hardware. |
| 319 | * |
| 320 | * If a command was available, fill in the SCSI-specific |
| 321 | * portions of the structure with information on the |
| 322 | * current command. |
| 323 | * |
| 324 | * LOCKING: |
| 325 | * spin_lock_irqsave(host_set lock) |
| 326 | * |
| 327 | * RETURNS: |
| 328 | * Command allocated, or %NULL if none available. |
| 329 | */ |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 330 | struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | struct scsi_cmnd *cmd, |
| 332 | void (*done)(struct scsi_cmnd *)) |
| 333 | { |
| 334 | struct ata_queued_cmd *qc; |
| 335 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 336 | qc = ata_qc_new_init(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | if (qc) { |
| 338 | qc->scsicmd = cmd; |
| 339 | qc->scsidone = done; |
| 340 | |
| 341 | if (cmd->use_sg) { |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 342 | qc->__sg = (struct scatterlist *) cmd->request_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | qc->n_elem = cmd->use_sg; |
| 344 | } else { |
Jeff Garzik | cedc9a4 | 2005-10-05 07:13:30 -0400 | [diff] [blame] | 345 | qc->__sg = &qc->sgent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | qc->n_elem = 1; |
| 347 | } |
| 348 | } else { |
| 349 | cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1); |
| 350 | done(cmd); |
| 351 | } |
| 352 | |
| 353 | return qc; |
| 354 | } |
| 355 | |
| 356 | /** |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 357 | * ata_dump_status - user friendly display of error info |
| 358 | * @id: id of the port in question |
| 359 | * @tf: ptr to filled out taskfile |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | * |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 361 | * Decode and dump the ATA error/status registers for the user so |
| 362 | * that they have some idea what really happened at the non |
| 363 | * make-believe layer. |
| 364 | * |
| 365 | * LOCKING: |
| 366 | * inherited from caller |
| 367 | */ |
| 368 | void ata_dump_status(unsigned id, struct ata_taskfile *tf) |
| 369 | { |
| 370 | u8 stat = tf->command, err = tf->feature; |
| 371 | |
| 372 | printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat); |
| 373 | if (stat & ATA_BUSY) { |
| 374 | printk("Busy }\n"); /* Data is not valid in this case */ |
| 375 | } else { |
| 376 | if (stat & 0x40) printk("DriveReady "); |
| 377 | if (stat & 0x20) printk("DeviceFault "); |
| 378 | if (stat & 0x10) printk("SeekComplete "); |
| 379 | if (stat & 0x08) printk("DataRequest "); |
| 380 | if (stat & 0x04) printk("CorrectedError "); |
| 381 | if (stat & 0x02) printk("Index "); |
| 382 | if (stat & 0x01) printk("Error "); |
| 383 | printk("}\n"); |
| 384 | |
| 385 | if (err) { |
| 386 | printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err); |
| 387 | if (err & 0x04) printk("DriveStatusError "); |
| 388 | if (err & 0x80) { |
| 389 | if (err & 0x04) printk("BadCRC "); |
| 390 | else printk("Sector "); |
| 391 | } |
| 392 | if (err & 0x40) printk("UncorrectableError "); |
| 393 | if (err & 0x10) printk("SectorIdNotFound "); |
| 394 | if (err & 0x02) printk("TrackZeroNotFound "); |
| 395 | if (err & 0x01) printk("AddrMarkNotFound "); |
| 396 | printk("}\n"); |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 401 | int ata_scsi_device_resume(struct scsi_device *sdev) |
| 402 | { |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 403 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
Tejun Heo | 3153436 | 2006-05-31 18:27:36 +0900 | [diff] [blame] | 404 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 405 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 406 | return ata_device_resume(dev); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 407 | } |
| 408 | |
Nigel Cunningham | 082776e | 2006-03-23 23:22:16 +1000 | [diff] [blame] | 409 | int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 410 | { |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 411 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
Tejun Heo | 3153436 | 2006-05-31 18:27:36 +0900 | [diff] [blame] | 412 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 413 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 414 | return ata_device_suspend(dev, state); |
Jens Axboe | 9b84754 | 2006-01-06 09:28:07 +0100 | [diff] [blame] | 415 | } |
| 416 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 417 | /** |
| 418 | * ata_to_sense_error - convert ATA error to SCSI error |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 419 | * @id: ATA device number |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 420 | * @drv_stat: value contained in ATA status register |
| 421 | * @drv_err: value contained in ATA error register |
| 422 | * @sk: the sense key we'll fill out |
| 423 | * @asc: the additional sense code we'll fill out |
| 424 | * @ascq: the additional sense code qualifier we'll fill out |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 425 | * @verbose: be verbose |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 426 | * |
| 427 | * Converts an ATA error into a SCSI error. Fill out pointers to |
| 428 | * SK, ASC, and ASCQ bytes for later use in fixed or descriptor |
| 429 | * format sense blocks. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | * |
| 431 | * LOCKING: |
| 432 | * spin_lock_irqsave(host_set lock) |
| 433 | */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 434 | void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc, |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 435 | u8 *ascq, int verbose) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 437 | int i; |
Jeff Garzik | ffe75ef | 2005-10-09 10:40:44 -0400 | [diff] [blame] | 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | /* Based on the 3ware driver translation table */ |
Arjan van de Ven | 98ac62d | 2005-11-28 10:06:23 +0100 | [diff] [blame] | 440 | static const unsigned char sense_table[][4] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | /* BBD|ECC|ID|MAR */ |
| 442 | {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command |
| 443 | /* BBD|ECC|ID */ |
| 444 | {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command |
| 445 | /* ECC|MC|MARK */ |
| 446 | {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error |
| 447 | /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */ |
| 448 | {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error |
| 449 | /* MC|ID|ABRT|TRK0|MARK */ |
| 450 | {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready |
| 451 | /* MCR|MARK */ |
| 452 | {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready |
| 453 | /* Bad address mark */ |
| 454 | {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field |
| 455 | /* TRK0 */ |
| 456 | {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error |
| 457 | /* Abort & !ICRC */ |
| 458 | {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command |
| 459 | /* Media change request */ |
| 460 | {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline |
| 461 | /* SRV */ |
| 462 | {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found |
| 463 | /* Media change */ |
| 464 | {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline |
| 465 | /* ECC */ |
| 466 | {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error |
| 467 | /* BBD - block marked bad */ |
| 468 | {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error |
| 469 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark |
| 470 | }; |
Arjan van de Ven | 98ac62d | 2005-11-28 10:06:23 +0100 | [diff] [blame] | 471 | static const unsigned char stat_table[][4] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | /* Must be first because BUSY means no other bits valid */ |
| 473 | {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now |
| 474 | {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault |
| 475 | {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now |
| 476 | {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered |
| 477 | {0xFF, 0xFF, 0xFF, 0xFF}, // END mark |
| 478 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | /* |
| 481 | * Is this an error we can process/parse |
| 482 | */ |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 483 | if (drv_stat & ATA_BUSY) { |
| 484 | drv_err = 0; /* Ignore the err bits, they're invalid */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 487 | if (drv_err) { |
| 488 | /* Look for drv_err */ |
| 489 | for (i = 0; sense_table[i][0] != 0xFF; i++) { |
| 490 | /* Look for best matches first */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 491 | if ((sense_table[i][0] & drv_err) == |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 492 | sense_table[i][0]) { |
| 493 | *sk = sense_table[i][1]; |
| 494 | *asc = sense_table[i][2]; |
| 495 | *ascq = sense_table[i][3]; |
| 496 | goto translate_done; |
| 497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 499 | /* No immediate match */ |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 500 | if (verbose) |
| 501 | printk(KERN_WARNING "ata%u: no sense translation for " |
| 502 | "error 0x%02x\n", id, drv_err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
| 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | /* Fall back to interpreting status bits */ |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 506 | for (i = 0; stat_table[i][0] != 0xFF; i++) { |
| 507 | if (stat_table[i][0] & drv_stat) { |
| 508 | *sk = stat_table[i][1]; |
| 509 | *asc = stat_table[i][2]; |
| 510 | *ascq = stat_table[i][3]; |
| 511 | goto translate_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 514 | /* No error? Undecoded? */ |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 515 | if (verbose) |
| 516 | printk(KERN_WARNING "ata%u: no sense translation for " |
| 517 | "status: 0x%02x\n", id, drv_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
Alan Cox | 2d20202 | 2006-03-21 15:53:46 +0000 | [diff] [blame] | 519 | /* We need a sensible error return here, which is tricky, and one |
| 520 | that won't cause people to do things like return a disk wrongly */ |
| 521 | *sk = ABORTED_COMMAND; |
| 522 | *asc = 0x00; |
| 523 | *ascq = 0x00; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 524 | |
| 525 | translate_done: |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 526 | if (verbose) |
| 527 | printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x " |
| 528 | "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", |
| 529 | id, drv_stat, drv_err, *sk, *asc, *ascq); |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 530 | return; |
| 531 | } |
| 532 | |
| 533 | /* |
| 534 | * ata_gen_ata_desc_sense - Generate check condition sense block. |
| 535 | * @qc: Command that completed. |
| 536 | * |
| 537 | * This function is specific to the ATA descriptor format sense |
| 538 | * block specified for the ATA pass through commands. Regardless |
| 539 | * of whether the command errored or not, return a sense |
| 540 | * block. Copy all controller registers into the sense |
| 541 | * block. Clear sense key, ASC & ASCQ if there is no error. |
| 542 | * |
| 543 | * LOCKING: |
| 544 | * spin_lock_irqsave(host_set lock) |
| 545 | */ |
| 546 | void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) |
| 547 | { |
| 548 | struct scsi_cmnd *cmd = qc->scsicmd; |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 549 | struct ata_taskfile *tf = &qc->result_tf; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 550 | unsigned char *sb = cmd->sense_buffer; |
| 551 | unsigned char *desc = sb + 8; |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 552 | int verbose = qc->ap->ops->error_handler == NULL; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 553 | |
| 554 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); |
| 555 | |
Jeff Garzik | 0e5dec4 | 2005-10-06 09:40:20 -0400 | [diff] [blame] | 556 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 557 | |
| 558 | /* |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 559 | * Use ata_to_sense_error() to map status register bits |
| 560 | * onto sense key, asc & ascq. |
| 561 | */ |
Tejun Heo | 058e55e | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 562 | if (qc->err_mask || |
| 563 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 564 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 565 | &sb[1], &sb[2], &sb[3], verbose); |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 566 | sb[1] &= 0x0f; |
| 567 | } |
| 568 | |
| 569 | /* |
| 570 | * Sense data is current and format is descriptor. |
| 571 | */ |
| 572 | sb[0] = 0x72; |
| 573 | |
| 574 | desc[0] = 0x09; |
| 575 | |
| 576 | /* |
| 577 | * Set length of additional sense data. |
| 578 | * Since we only populate descriptor 0, the total |
| 579 | * length is the same (fixed) length as descriptor 0. |
| 580 | */ |
| 581 | desc[1] = sb[7] = 14; |
| 582 | |
| 583 | /* |
| 584 | * Copy registers into sense buffer. |
| 585 | */ |
| 586 | desc[2] = 0x00; |
| 587 | desc[3] = tf->feature; /* == error reg */ |
| 588 | desc[5] = tf->nsect; |
| 589 | desc[7] = tf->lbal; |
| 590 | desc[9] = tf->lbam; |
| 591 | desc[11] = tf->lbah; |
| 592 | desc[12] = tf->device; |
| 593 | desc[13] = tf->command; /* == status reg */ |
| 594 | |
| 595 | /* |
| 596 | * Fill in Extend bit, and the high order bytes |
| 597 | * if applicable. |
| 598 | */ |
| 599 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 600 | desc[2] |= 0x01; |
| 601 | desc[4] = tf->hob_nsect; |
| 602 | desc[6] = tf->hob_lbal; |
| 603 | desc[8] = tf->hob_lbam; |
| 604 | desc[10] = tf->hob_lbah; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * ata_gen_fixed_sense - generate a SCSI fixed sense block |
| 610 | * @qc: Command that we are erroring out |
| 611 | * |
| 612 | * Leverage ata_to_sense_error() to give us the codes. Fit our |
| 613 | * LBA in here if there's room. |
| 614 | * |
| 615 | * LOCKING: |
| 616 | * inherited from caller |
| 617 | */ |
| 618 | void ata_gen_fixed_sense(struct ata_queued_cmd *qc) |
| 619 | { |
| 620 | struct scsi_cmnd *cmd = qc->scsicmd; |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 621 | struct ata_taskfile *tf = &qc->result_tf; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 622 | unsigned char *sb = cmd->sense_buffer; |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 623 | int verbose = qc->ap->ops->error_handler == NULL; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 624 | |
| 625 | memset(sb, 0, SCSI_SENSE_BUFFERSIZE); |
| 626 | |
Jeff Garzik | 0e5dec4 | 2005-10-06 09:40:20 -0400 | [diff] [blame] | 627 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 628 | |
| 629 | /* |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 630 | * Use ata_to_sense_error() to map status register bits |
| 631 | * onto sense key, asc & ascq. |
| 632 | */ |
Tejun Heo | 058e55e | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 633 | if (qc->err_mask || |
| 634 | tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 635 | ata_to_sense_error(qc->ap->id, tf->command, tf->feature, |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 636 | &sb[2], &sb[12], &sb[13], verbose); |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 637 | sb[2] &= 0x0f; |
| 638 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | sb[0] = 0x70; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 641 | sb[7] = 0x0a; |
Jeff Garzik | 0274aa2 | 2005-06-22 13:50:56 -0400 | [diff] [blame] | 642 | |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 643 | if (tf->flags & ATA_TFLAG_LBA48) { |
| 644 | /* TODO: find solution for LBA48 descriptors */ |
| 645 | } |
| 646 | |
| 647 | else if (tf->flags & ATA_TFLAG_LBA) { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 648 | /* A small (28b) LBA will fit in the 32b info field */ |
| 649 | sb[0] |= 0x80; /* set valid bit */ |
| 650 | sb[3] = tf->device & 0x0f; |
| 651 | sb[4] = tf->lbah; |
| 652 | sb[5] = tf->lbam; |
| 653 | sb[6] = tf->lbal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 655 | |
| 656 | else { |
| 657 | /* TODO: C/H/S */ |
| 658 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | } |
| 660 | |
Brian King | a6cce2a | 2006-03-17 17:04:15 -0600 | [diff] [blame] | 661 | static void ata_scsi_sdev_config(struct scsi_device *sdev) |
| 662 | { |
| 663 | sdev->use_10_for_rw = 1; |
| 664 | sdev->use_10_for_ms = 1; |
| 665 | } |
| 666 | |
| 667 | static void ata_scsi_dev_config(struct scsi_device *sdev, |
| 668 | struct ata_device *dev) |
| 669 | { |
| 670 | unsigned int max_sectors; |
| 671 | |
| 672 | /* TODO: 2048 is an arbitrary number, not the |
| 673 | * hardware maximum. This should be increased to |
| 674 | * 65534 when Jens Axboe's patch for dynamically |
| 675 | * determining max_sectors is merged. |
| 676 | */ |
| 677 | max_sectors = ATA_MAX_SECTORS; |
| 678 | if (dev->flags & ATA_DFLAG_LBA48) |
Tejun Heo | 200d5a7 | 2006-02-15 16:24:49 +0900 | [diff] [blame] | 679 | max_sectors = ATA_MAX_SECTORS_LBA48; |
Brian King | a6cce2a | 2006-03-17 17:04:15 -0600 | [diff] [blame] | 680 | if (dev->max_sectors) |
| 681 | max_sectors = dev->max_sectors; |
| 682 | |
| 683 | blk_queue_max_sectors(sdev->request_queue, max_sectors); |
| 684 | |
| 685 | /* |
| 686 | * SATA DMA transfers must be multiples of 4 byte, so |
| 687 | * we need to pad ATAPI transfers using an extra sg. |
| 688 | * Decrement max hw segments accordingly. |
| 689 | */ |
| 690 | if (dev->class == ATA_DEV_ATAPI) { |
| 691 | request_queue_t *q = sdev->request_queue; |
| 692 | blk_queue_max_hw_segments(q, q->max_hw_segments - 1); |
| 693 | } |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 694 | |
| 695 | if (dev->flags & ATA_DFLAG_NCQ) { |
| 696 | int depth; |
| 697 | |
| 698 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); |
| 699 | depth = min(ATA_MAX_QUEUE - 1, depth); |
| 700 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth); |
| 701 | } |
Brian King | a6cce2a | 2006-03-17 17:04:15 -0600 | [diff] [blame] | 702 | } |
| 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | /** |
| 705 | * ata_scsi_slave_config - Set SCSI device attributes |
| 706 | * @sdev: SCSI device to examine |
| 707 | * |
| 708 | * This is called before we actually start reading |
| 709 | * and writing to the device, to configure certain |
| 710 | * SCSI mid-layer behaviors. |
| 711 | * |
| 712 | * LOCKING: |
| 713 | * Defined by SCSI layer. We don't really care. |
| 714 | */ |
| 715 | |
| 716 | int ata_scsi_slave_config(struct scsi_device *sdev) |
| 717 | { |
Tejun Heo | 3153436 | 2006-05-31 18:27:36 +0900 | [diff] [blame] | 718 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
| 719 | struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
| 720 | |
Brian King | a6cce2a | 2006-03-17 17:04:15 -0600 | [diff] [blame] | 721 | ata_scsi_sdev_config(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
| 723 | blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); |
| 724 | |
Tejun Heo | 3153436 | 2006-05-31 18:27:36 +0900 | [diff] [blame] | 725 | if (dev) |
Brian King | a6cce2a | 2006-03-17 17:04:15 -0600 | [diff] [blame] | 726 | ata_scsi_dev_config(sdev, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | return 0; /* scsi layer doesn't check return value, sigh */ |
| 729 | } |
| 730 | |
| 731 | /** |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame^] | 732 | * ata_scsi_slave_destroy - SCSI device is about to be destroyed |
| 733 | * @sdev: SCSI device to be destroyed |
| 734 | * |
| 735 | * @sdev is about to be destroyed for hot/warm unplugging. If |
| 736 | * this unplugging was initiated by libata as indicated by NULL |
| 737 | * dev->sdev, this function doesn't have to do anything. |
| 738 | * Otherwise, SCSI layer initiated warm-unplug is in progress. |
| 739 | * Clear dev->sdev, schedule the device for ATA detach and invoke |
| 740 | * EH. |
| 741 | * |
| 742 | * LOCKING: |
| 743 | * Defined by SCSI layer. We don't really care. |
| 744 | */ |
| 745 | void ata_scsi_slave_destroy(struct scsi_device *sdev) |
| 746 | { |
| 747 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
| 748 | unsigned long flags; |
| 749 | struct ata_device *dev; |
| 750 | |
| 751 | if (!ap->ops->error_handler) |
| 752 | return; |
| 753 | |
| 754 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 755 | dev = __ata_scsi_find_dev(ap, sdev); |
| 756 | if (dev && dev->sdev) { |
| 757 | /* SCSI device already in CANCEL state, no need to offline it */ |
| 758 | dev->sdev = NULL; |
| 759 | dev->flags |= ATA_DFLAG_DETACH; |
| 760 | ata_port_schedule_eh(ap); |
| 761 | } |
| 762 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 763 | } |
| 764 | |
| 765 | /** |
Tejun Heo | a6e6ce8 | 2006-05-15 21:03:48 +0900 | [diff] [blame] | 766 | * ata_scsi_change_queue_depth - SCSI callback for queue depth config |
| 767 | * @sdev: SCSI device to configure queue depth for |
| 768 | * @queue_depth: new queue depth |
| 769 | * |
| 770 | * This is libata standard hostt->change_queue_depth callback. |
| 771 | * SCSI will call into this callback when user tries to set queue |
| 772 | * depth via sysfs. |
| 773 | * |
| 774 | * LOCKING: |
| 775 | * SCSI layer (we don't care) |
| 776 | * |
| 777 | * RETURNS: |
| 778 | * Newly configured queue depth. |
| 779 | */ |
| 780 | int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) |
| 781 | { |
| 782 | struct ata_port *ap = ata_shost_to_port(sdev->host); |
| 783 | struct ata_device *dev; |
| 784 | int max_depth; |
| 785 | |
| 786 | if (queue_depth < 1) |
| 787 | return sdev->queue_depth; |
| 788 | |
| 789 | dev = ata_scsi_find_dev(ap, sdev); |
| 790 | if (!dev || !ata_dev_enabled(dev)) |
| 791 | return sdev->queue_depth; |
| 792 | |
| 793 | max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); |
| 794 | max_depth = min(ATA_MAX_QUEUE - 1, max_depth); |
| 795 | if (queue_depth > max_depth) |
| 796 | queue_depth = max_depth; |
| 797 | |
| 798 | scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth); |
| 799 | return queue_depth; |
| 800 | } |
| 801 | |
| 802 | /** |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 803 | * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command |
| 804 | * @qc: Storage for translated ATA taskfile |
| 805 | * @scsicmd: SCSI command to translate |
| 806 | * |
| 807 | * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY |
| 808 | * (to start). Perhaps these commands should be preceded by |
| 809 | * CHECK POWER MODE to see what power mode the device is already in. |
| 810 | * [See SAT revision 5 at www.t10.org] |
| 811 | * |
| 812 | * LOCKING: |
| 813 | * spin_lock_irqsave(host_set lock) |
| 814 | * |
| 815 | * RETURNS: |
| 816 | * Zero on success, non-zero on error. |
| 817 | */ |
| 818 | |
| 819 | static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 820 | const u8 *scsicmd) |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 821 | { |
| 822 | struct ata_taskfile *tf = &qc->tf; |
| 823 | |
| 824 | tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| 825 | tf->protocol = ATA_PROT_NODATA; |
| 826 | if (scsicmd[1] & 0x1) { |
| 827 | ; /* ignore IMMED bit, violates sat-r05 */ |
| 828 | } |
| 829 | if (scsicmd[4] & 0x2) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 830 | goto invalid_fld; /* LOEJ bit set not supported */ |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 831 | if (((scsicmd[4] >> 4) & 0xf) != 0) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 832 | goto invalid_fld; /* power conditions not supported */ |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 833 | if (scsicmd[4] & 0x1) { |
| 834 | tf->nsect = 1; /* 1 sector, lba=0 */ |
Albert Lee | 9d5b130 | 2005-10-04 08:48:17 -0400 | [diff] [blame] | 835 | |
| 836 | if (qc->dev->flags & ATA_DFLAG_LBA) { |
Tejun Heo | c44078c | 2006-05-15 20:57:21 +0900 | [diff] [blame] | 837 | tf->flags |= ATA_TFLAG_LBA; |
Albert Lee | 9d5b130 | 2005-10-04 08:48:17 -0400 | [diff] [blame] | 838 | |
| 839 | tf->lbah = 0x0; |
| 840 | tf->lbam = 0x0; |
| 841 | tf->lbal = 0x0; |
| 842 | tf->device |= ATA_LBA; |
| 843 | } else { |
| 844 | /* CHS */ |
| 845 | tf->lbal = 0x1; /* sect */ |
| 846 | tf->lbam = 0x0; /* cyl low */ |
| 847 | tf->lbah = 0x0; /* cyl high */ |
| 848 | } |
| 849 | |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 850 | tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ |
| 851 | } else { |
| 852 | tf->nsect = 0; /* time period value (0 implies now) */ |
| 853 | tf->command = ATA_CMD_STANDBY; |
| 854 | /* Consider: ATA STANDBY IMMEDIATE command */ |
| 855 | } |
| 856 | /* |
| 857 | * Standby and Idle condition timers could be implemented but that |
| 858 | * would require libata to implement the Power condition mode page |
| 859 | * and allow the user to change it. Changing mode pages requires |
| 860 | * MODE SELECT to be implemented. |
| 861 | */ |
| 862 | |
| 863 | return 0; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 864 | |
| 865 | invalid_fld: |
| 866 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); |
| 867 | /* "Invalid field in cbd" */ |
| 868 | return 1; |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 869 | } |
| 870 | |
| 871 | |
| 872 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command |
| 874 | * @qc: Storage for translated ATA taskfile |
| 875 | * @scsicmd: SCSI command to translate (ignored) |
| 876 | * |
| 877 | * Sets up an ATA taskfile to issue FLUSH CACHE or |
| 878 | * FLUSH CACHE EXT. |
| 879 | * |
| 880 | * LOCKING: |
| 881 | * spin_lock_irqsave(host_set lock) |
| 882 | * |
| 883 | * RETURNS: |
| 884 | * Zero on success, non-zero on error. |
| 885 | */ |
| 886 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 887 | static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | { |
| 889 | struct ata_taskfile *tf = &qc->tf; |
| 890 | |
| 891 | tf->flags |= ATA_TFLAG_DEVICE; |
| 892 | tf->protocol = ATA_PROT_NODATA; |
| 893 | |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 894 | if ((qc->dev->flags & ATA_DFLAG_LBA48) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | (ata_id_has_flush_ext(qc->dev->id))) |
| 896 | tf->command = ATA_CMD_FLUSH_EXT; |
| 897 | else |
| 898 | tf->command = ATA_CMD_FLUSH; |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | |
| 903 | /** |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 904 | * scsi_6_lba_len - Get LBA and transfer length |
| 905 | * @scsicmd: SCSI command to translate |
| 906 | * |
| 907 | * Calculate LBA and transfer length for 6-byte commands. |
| 908 | * |
| 909 | * RETURNS: |
| 910 | * @plba: the LBA |
| 911 | * @plen: the transfer length |
| 912 | */ |
| 913 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 914 | static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 915 | { |
| 916 | u64 lba = 0; |
| 917 | u32 len = 0; |
| 918 | |
| 919 | VPRINTK("six-byte command\n"); |
| 920 | |
| 921 | lba |= ((u64)scsicmd[2]) << 8; |
| 922 | lba |= ((u64)scsicmd[3]); |
| 923 | |
| 924 | len |= ((u32)scsicmd[4]); |
| 925 | |
| 926 | *plba = lba; |
| 927 | *plen = len; |
| 928 | } |
| 929 | |
| 930 | /** |
| 931 | * scsi_10_lba_len - Get LBA and transfer length |
| 932 | * @scsicmd: SCSI command to translate |
| 933 | * |
| 934 | * Calculate LBA and transfer length for 10-byte commands. |
| 935 | * |
| 936 | * RETURNS: |
| 937 | * @plba: the LBA |
| 938 | * @plen: the transfer length |
| 939 | */ |
| 940 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 941 | static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 942 | { |
| 943 | u64 lba = 0; |
| 944 | u32 len = 0; |
| 945 | |
| 946 | VPRINTK("ten-byte command\n"); |
| 947 | |
| 948 | lba |= ((u64)scsicmd[2]) << 24; |
| 949 | lba |= ((u64)scsicmd[3]) << 16; |
| 950 | lba |= ((u64)scsicmd[4]) << 8; |
| 951 | lba |= ((u64)scsicmd[5]); |
| 952 | |
| 953 | len |= ((u32)scsicmd[7]) << 8; |
| 954 | len |= ((u32)scsicmd[8]); |
| 955 | |
| 956 | *plba = lba; |
| 957 | *plen = len; |
| 958 | } |
| 959 | |
| 960 | /** |
| 961 | * scsi_16_lba_len - Get LBA and transfer length |
| 962 | * @scsicmd: SCSI command to translate |
| 963 | * |
| 964 | * Calculate LBA and transfer length for 16-byte commands. |
| 965 | * |
| 966 | * RETURNS: |
| 967 | * @plba: the LBA |
| 968 | * @plen: the transfer length |
| 969 | */ |
| 970 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 971 | static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 972 | { |
| 973 | u64 lba = 0; |
| 974 | u32 len = 0; |
| 975 | |
| 976 | VPRINTK("sixteen-byte command\n"); |
| 977 | |
| 978 | lba |= ((u64)scsicmd[2]) << 56; |
| 979 | lba |= ((u64)scsicmd[3]) << 48; |
| 980 | lba |= ((u64)scsicmd[4]) << 40; |
| 981 | lba |= ((u64)scsicmd[5]) << 32; |
| 982 | lba |= ((u64)scsicmd[6]) << 24; |
| 983 | lba |= ((u64)scsicmd[7]) << 16; |
| 984 | lba |= ((u64)scsicmd[8]) << 8; |
| 985 | lba |= ((u64)scsicmd[9]); |
| 986 | |
| 987 | len |= ((u32)scsicmd[10]) << 24; |
| 988 | len |= ((u32)scsicmd[11]) << 16; |
| 989 | len |= ((u32)scsicmd[12]) << 8; |
| 990 | len |= ((u32)scsicmd[13]); |
| 991 | |
| 992 | *plba = lba; |
| 993 | *plen = len; |
| 994 | } |
| 995 | |
| 996 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one |
| 998 | * @qc: Storage for translated ATA taskfile |
| 999 | * @scsicmd: SCSI command to translate |
| 1000 | * |
| 1001 | * Converts SCSI VERIFY command to an ATA READ VERIFY command. |
| 1002 | * |
| 1003 | * LOCKING: |
| 1004 | * spin_lock_irqsave(host_set lock) |
| 1005 | * |
| 1006 | * RETURNS: |
| 1007 | * Zero on success, non-zero on error. |
| 1008 | */ |
| 1009 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1010 | static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | { |
| 1012 | struct ata_taskfile *tf = &qc->tf; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1013 | struct ata_device *dev = qc->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | u64 dev_sectors = qc->dev->n_sectors; |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1015 | u64 block; |
| 1016 | u32 n_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
| 1018 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 1019 | tf->protocol = ATA_PROT_NODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1021 | if (scsicmd[0] == VERIFY) |
| 1022 | scsi_10_lba_len(scsicmd, &block, &n_block); |
| 1023 | else if (scsicmd[0] == VERIFY_16) |
| 1024 | scsi_16_lba_len(scsicmd, &block, &n_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | else |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1026 | goto invalid_fld; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1028 | if (!n_block) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1029 | goto nothing_to_do; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1030 | if (block >= dev_sectors) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1031 | goto out_of_range; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1032 | if ((block + n_block) > dev_sectors) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1033 | goto out_of_range; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 1035 | if (dev->flags & ATA_DFLAG_LBA) { |
| 1036 | tf->flags |= ATA_TFLAG_LBA; |
| 1037 | |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1038 | if (lba_28_ok(block, n_block)) { |
| 1039 | /* use LBA28 */ |
| 1040 | tf->command = ATA_CMD_VERIFY; |
| 1041 | tf->device |= (block >> 24) & 0xf; |
| 1042 | } else if (lba_48_ok(block, n_block)) { |
| 1043 | if (!(dev->flags & ATA_DFLAG_LBA48)) |
| 1044 | goto out_of_range; |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 1045 | |
| 1046 | /* use LBA48 */ |
| 1047 | tf->flags |= ATA_TFLAG_LBA48; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1048 | tf->command = ATA_CMD_VERIFY_EXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1050 | tf->hob_nsect = (n_block >> 8) & 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1052 | tf->hob_lbah = (block >> 40) & 0xff; |
| 1053 | tf->hob_lbam = (block >> 32) & 0xff; |
| 1054 | tf->hob_lbal = (block >> 24) & 0xff; |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1055 | } else |
| 1056 | /* request too large even for LBA48 */ |
| 1057 | goto out_of_range; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1058 | |
| 1059 | tf->nsect = n_block & 0xff; |
| 1060 | |
| 1061 | tf->lbah = (block >> 16) & 0xff; |
| 1062 | tf->lbam = (block >> 8) & 0xff; |
| 1063 | tf->lbal = block & 0xff; |
| 1064 | |
| 1065 | tf->device |= ATA_LBA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | } else { |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1067 | /* CHS */ |
| 1068 | u32 sect, head, cyl, track; |
| 1069 | |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1070 | if (!lba_28_ok(block, n_block)) |
| 1071 | goto out_of_range; |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 1072 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1073 | /* Convert LBA to CHS */ |
| 1074 | track = (u32)block / dev->sectors; |
| 1075 | cyl = track / dev->heads; |
| 1076 | head = track % dev->heads; |
| 1077 | sect = (u32)block % dev->sectors + 1; |
| 1078 | |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1079 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| 1080 | (u32)block, track, cyl, head, sect); |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1081 | |
| 1082 | /* Check whether the converted CHS can fit. |
| 1083 | Cylinder: 0-65535 |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1084 | Head: 0-15 |
| 1085 | Sector: 1-255*/ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1086 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1087 | goto out_of_range; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | tf->command = ATA_CMD_VERIFY; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1090 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| 1091 | tf->lbal = sect; |
| 1092 | tf->lbam = cyl; |
| 1093 | tf->lbah = cyl >> 8; |
| 1094 | tf->device |= head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | } |
| 1096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | return 0; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1098 | |
| 1099 | invalid_fld: |
| 1100 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); |
| 1101 | /* "Invalid field in cbd" */ |
| 1102 | return 1; |
| 1103 | |
| 1104 | out_of_range: |
| 1105 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); |
| 1106 | /* "Logical Block Address out of range" */ |
| 1107 | return 1; |
| 1108 | |
| 1109 | nothing_to_do: |
| 1110 | qc->scsicmd->result = SAM_STAT_GOOD; |
| 1111 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one |
| 1116 | * @qc: Storage for translated ATA taskfile |
| 1117 | * @scsicmd: SCSI command to translate |
| 1118 | * |
| 1119 | * Converts any of six SCSI read/write commands into the |
| 1120 | * ATA counterpart, including starting sector (LBA), |
| 1121 | * sector count, and taking into account the device's LBA48 |
| 1122 | * support. |
| 1123 | * |
| 1124 | * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and |
| 1125 | * %WRITE_16 are currently supported. |
| 1126 | * |
| 1127 | * LOCKING: |
| 1128 | * spin_lock_irqsave(host_set lock) |
| 1129 | * |
| 1130 | * RETURNS: |
| 1131 | * Zero on success, non-zero on error. |
| 1132 | */ |
| 1133 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 1134 | static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | { |
| 1136 | struct ata_taskfile *tf = &qc->tf; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1137 | struct ata_device *dev = qc->dev; |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1138 | u64 block; |
| 1139 | u32 n_block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
Tejun Heo | 2719736 | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 1141 | qc->flags |= ATA_QCFLAG_IO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 1144 | if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || |
| 1145 | scsicmd[0] == WRITE_16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | tf->flags |= ATA_TFLAG_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1148 | /* Calculate the SCSI LBA, transfer length and FUA. */ |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1149 | switch (scsicmd[0]) { |
| 1150 | case READ_10: |
| 1151 | case WRITE_10: |
| 1152 | scsi_10_lba_len(scsicmd, &block, &n_block); |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1153 | if (unlikely(scsicmd[1] & (1 << 3))) |
| 1154 | tf->flags |= ATA_TFLAG_FUA; |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1155 | break; |
| 1156 | case READ_6: |
| 1157 | case WRITE_6: |
| 1158 | scsi_6_lba_len(scsicmd, &block, &n_block); |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1159 | |
| 1160 | /* for 6-byte r/w commands, transfer length 0 |
| 1161 | * means 256 blocks of data, not 0 block. |
| 1162 | */ |
Jeff Garzik | 76b2bf9 | 2005-08-29 19:24:43 -0400 | [diff] [blame] | 1163 | if (!n_block) |
| 1164 | n_block = 256; |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1165 | break; |
| 1166 | case READ_16: |
| 1167 | case WRITE_16: |
| 1168 | scsi_16_lba_len(scsicmd, &block, &n_block); |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1169 | if (unlikely(scsicmd[1] & (1 << 3))) |
| 1170 | tf->flags |= ATA_TFLAG_FUA; |
Albert Lee | 3aef523 | 2005-10-04 08:47:43 -0400 | [diff] [blame] | 1171 | break; |
| 1172 | default: |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1173 | DPRINTK("no-byte command\n"); |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1174 | goto invalid_fld; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | } |
| 1176 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1177 | /* Check and compose ATA command */ |
| 1178 | if (!n_block) |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1179 | /* For 10-byte and 16-byte SCSI R/W commands, transfer |
| 1180 | * length 0 means transfer 0 block of data. |
| 1181 | * However, for ATA R/W commands, sector count 0 means |
| 1182 | * 256 or 65536 sectors, not 0 sectors as in SCSI. |
Alan Cox | f51750d | 2005-11-07 17:06:33 +0000 | [diff] [blame] | 1183 | * |
| 1184 | * WARNING: one or two older ATA drives treat 0 as 0... |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1185 | */ |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1186 | goto nothing_to_do; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1187 | |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 1188 | if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) { |
| 1189 | /* yay, NCQ */ |
| 1190 | if (!lba_48_ok(block, n_block)) |
| 1191 | goto out_of_range; |
| 1192 | |
| 1193 | tf->protocol = ATA_PROT_NCQ; |
| 1194 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| 1195 | |
| 1196 | if (tf->flags & ATA_TFLAG_WRITE) |
| 1197 | tf->command = ATA_CMD_FPDMA_WRITE; |
| 1198 | else |
| 1199 | tf->command = ATA_CMD_FPDMA_READ; |
| 1200 | |
| 1201 | qc->nsect = n_block; |
| 1202 | |
| 1203 | tf->nsect = qc->tag << 3; |
| 1204 | tf->hob_feature = (n_block >> 8) & 0xff; |
| 1205 | tf->feature = n_block & 0xff; |
| 1206 | |
| 1207 | tf->hob_lbah = (block >> 40) & 0xff; |
| 1208 | tf->hob_lbam = (block >> 32) & 0xff; |
| 1209 | tf->hob_lbal = (block >> 24) & 0xff; |
| 1210 | tf->lbah = (block >> 16) & 0xff; |
| 1211 | tf->lbam = (block >> 8) & 0xff; |
| 1212 | tf->lbal = block & 0xff; |
| 1213 | |
| 1214 | tf->device = 1 << 6; |
| 1215 | if (tf->flags & ATA_TFLAG_FUA) |
| 1216 | tf->device |= 1 << 7; |
| 1217 | } else if (dev->flags & ATA_DFLAG_LBA) { |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 1218 | tf->flags |= ATA_TFLAG_LBA; |
| 1219 | |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1220 | if (lba_28_ok(block, n_block)) { |
| 1221 | /* use LBA28 */ |
| 1222 | tf->device |= (block >> 24) & 0xf; |
| 1223 | } else if (lba_48_ok(block, n_block)) { |
| 1224 | if (!(dev->flags & ATA_DFLAG_LBA48)) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1225 | goto out_of_range; |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1226 | |
Albert Lee | 0750669 | 2005-10-12 15:04:18 +0800 | [diff] [blame] | 1227 | /* use LBA48 */ |
| 1228 | tf->flags |= ATA_TFLAG_LBA48; |
| 1229 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1230 | tf->hob_nsect = (n_block >> 8) & 0xff; |
| 1231 | |
| 1232 | tf->hob_lbah = (block >> 40) & 0xff; |
| 1233 | tf->hob_lbam = (block >> 32) & 0xff; |
| 1234 | tf->hob_lbal = (block >> 24) & 0xff; |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1235 | } else |
| 1236 | /* request too large even for LBA48 */ |
| 1237 | goto out_of_range; |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1238 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1239 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) |
| 1240 | goto invalid_fld; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 1241 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1242 | qc->nsect = n_block; |
| 1243 | tf->nsect = n_block & 0xff; |
| 1244 | |
| 1245 | tf->lbah = (block >> 16) & 0xff; |
| 1246 | tf->lbam = (block >> 8) & 0xff; |
| 1247 | tf->lbal = block & 0xff; |
| 1248 | |
| 1249 | tf->device |= ATA_LBA; |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1250 | } else { |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1251 | /* CHS */ |
| 1252 | u32 sect, head, cyl, track; |
| 1253 | |
| 1254 | /* The request -may- be too large for CHS addressing. */ |
Albert Lee | c6a33e2 | 2005-10-12 15:12:26 +0800 | [diff] [blame] | 1255 | if (!lba_28_ok(block, n_block)) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1256 | goto out_of_range; |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1257 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1258 | if (unlikely(ata_rwcmd_protocol(qc) < 0)) |
| 1259 | goto invalid_fld; |
Albert Lee | 8cbd6df | 2005-10-12 15:06:27 +0800 | [diff] [blame] | 1260 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1261 | /* Convert LBA to CHS */ |
| 1262 | track = (u32)block / dev->sectors; |
| 1263 | cyl = track / dev->heads; |
| 1264 | head = track % dev->heads; |
| 1265 | sect = (u32)block % dev->sectors + 1; |
| 1266 | |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1267 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1268 | (u32)block, track, cyl, head, sect); |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1269 | |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1270 | /* Check whether the converted CHS can fit. |
| 1271 | Cylinder: 0-65535 |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1272 | Head: 0-15 |
| 1273 | Sector: 1-255*/ |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1274 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1275 | goto out_of_range; |
Albert Lee | c187c4b | 2005-10-04 08:46:51 -0400 | [diff] [blame] | 1276 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 1277 | qc->nsect = n_block; |
| 1278 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| 1279 | tf->lbal = sect; |
| 1280 | tf->lbam = cyl; |
| 1281 | tf->lbah = cyl >> 8; |
| 1282 | tf->device |= head; |
| 1283 | } |
| 1284 | |
| 1285 | return 0; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1286 | |
| 1287 | invalid_fld: |
| 1288 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); |
| 1289 | /* "Invalid field in cbd" */ |
| 1290 | return 1; |
| 1291 | |
| 1292 | out_of_range: |
| 1293 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); |
| 1294 | /* "Logical Block Address out of range" */ |
| 1295 | return 1; |
| 1296 | |
| 1297 | nothing_to_do: |
| 1298 | qc->scsicmd->result = SAM_STAT_GOOD; |
| 1299 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | } |
| 1301 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1302 | static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | { |
| 1304 | struct scsi_cmnd *cmd = qc->scsicmd; |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 1305 | u8 *cdb = cmd->cmnd; |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 1306 | int need_sense = (qc->err_mask != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 1308 | /* For ATA pass thru (SAT) commands, generate a sense block if |
| 1309 | * user mandated it or if there's an error. Note that if we |
| 1310 | * generate because the user forced us to, a check condition |
| 1311 | * is generated and the ATA register values are returned |
| 1312 | * whether the command completed successfully or not. If there |
| 1313 | * was no error, SK, ASC and ASCQ will all be zero. |
| 1314 | */ |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 1315 | if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && |
| 1316 | ((cdb[2] & 0x20) || need_sense)) { |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 1317 | ata_gen_ata_desc_sense(qc); |
| 1318 | } else { |
| 1319 | if (!need_sense) { |
| 1320 | cmd->result = SAM_STAT_GOOD; |
| 1321 | } else { |
| 1322 | /* TODO: decide which descriptor format to use |
| 1323 | * for 48b LBA devices and call that here |
| 1324 | * instead of the fixed desc, which is only |
| 1325 | * good for smaller LBA (and maybe CHS?) |
| 1326 | * devices. |
| 1327 | */ |
| 1328 | ata_gen_fixed_sense(qc); |
| 1329 | } |
| 1330 | } |
| 1331 | |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 1332 | if (need_sense && !qc->ap->ops->error_handler) |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 1333 | ata_dump_status(qc->ap->id, &qc->result_tf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | |
| 1335 | qc->scsidone(cmd); |
| 1336 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 1337 | ata_qc_free(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | } |
| 1339 | |
| 1340 | /** |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 1341 | * ata_scmd_need_defer - Check whether we need to defer scmd |
| 1342 | * @dev: ATA device to which the command is addressed |
| 1343 | * @is_io: Is the command IO (and thus possibly NCQ)? |
| 1344 | * |
| 1345 | * NCQ and non-NCQ commands cannot run together. As upper layer |
| 1346 | * only knows the queue depth, we are responsible for maintaining |
| 1347 | * exclusion. This function checks whether a new command can be |
| 1348 | * issued to @dev. |
| 1349 | * |
| 1350 | * LOCKING: |
| 1351 | * spin_lock_irqsave(host_set lock) |
| 1352 | * |
| 1353 | * RETURNS: |
| 1354 | * 1 if deferring is needed, 0 otherwise. |
| 1355 | */ |
| 1356 | static int ata_scmd_need_defer(struct ata_device *dev, int is_io) |
| 1357 | { |
| 1358 | struct ata_port *ap = dev->ap; |
| 1359 | |
| 1360 | if (!(dev->flags & ATA_DFLAG_NCQ)) |
| 1361 | return 0; |
| 1362 | |
| 1363 | if (is_io) { |
| 1364 | if (!ata_tag_valid(ap->active_tag)) |
| 1365 | return 0; |
| 1366 | } else { |
| 1367 | if (!ata_tag_valid(ap->active_tag) && !ap->sactive) |
| 1368 | return 0; |
| 1369 | } |
| 1370 | return 1; |
| 1371 | } |
| 1372 | |
| 1373 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | * ata_scsi_translate - Translate then issue SCSI command to ATA device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | * @dev: ATA device to which the command is addressed |
| 1376 | * @cmd: SCSI command to execute |
| 1377 | * @done: SCSI command completion function |
| 1378 | * @xlat_func: Actor which translates @cmd to an ATA taskfile |
| 1379 | * |
| 1380 | * Our ->queuecommand() function has decided that the SCSI |
| 1381 | * command issued can be directly translated into an ATA |
| 1382 | * command, rather than handled internally. |
| 1383 | * |
| 1384 | * This function sets up an ata_queued_cmd structure for the |
| 1385 | * SCSI command, and sends that ata_queued_cmd to the hardware. |
| 1386 | * |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1387 | * The xlat_func argument (actor) returns 0 if ready to execute |
| 1388 | * ATA command, else 1 to finish translation. If 1 is returned |
| 1389 | * then cmd->result (and possibly cmd->sense_buffer) are assumed |
| 1390 | * to be set reflecting an error condition or clean (early) |
| 1391 | * termination. |
| 1392 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | * LOCKING: |
| 1394 | * spin_lock_irqsave(host_set lock) |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 1395 | * |
| 1396 | * RETURNS: |
| 1397 | * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command |
| 1398 | * needs to be deferred. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | */ |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 1400 | static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd, |
| 1401 | void (*done)(struct scsi_cmnd *), |
| 1402 | ata_xlat_func_t xlat_func) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | { |
| 1404 | struct ata_queued_cmd *qc; |
| 1405 | u8 *scsicmd = cmd->cmnd; |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 1406 | int is_io = xlat_func == ata_scsi_rw_xlat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | |
| 1408 | VPRINTK("ENTER\n"); |
| 1409 | |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 1410 | if (unlikely(ata_scmd_need_defer(dev, is_io))) |
| 1411 | goto defer; |
| 1412 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 1413 | qc = ata_scsi_qc_new(dev, cmd, done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | if (!qc) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1415 | goto err_mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | |
| 1417 | /* data is present; dma-map it */ |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 1418 | if (cmd->sc_data_direction == DMA_FROM_DEVICE || |
| 1419 | cmd->sc_data_direction == DMA_TO_DEVICE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | if (unlikely(cmd->request_bufflen < 1)) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 1421 | ata_dev_printk(dev, KERN_WARNING, |
| 1422 | "WARNING: zero len r/w req\n"); |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1423 | goto err_did; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | } |
| 1425 | |
| 1426 | if (cmd->use_sg) |
| 1427 | ata_sg_init(qc, cmd->request_buffer, cmd->use_sg); |
| 1428 | else |
| 1429 | ata_sg_init_one(qc, cmd->request_buffer, |
| 1430 | cmd->request_bufflen); |
| 1431 | |
| 1432 | qc->dma_dir = cmd->sc_data_direction; |
| 1433 | } |
| 1434 | |
| 1435 | qc->complete_fn = ata_scsi_qc_complete; |
| 1436 | |
| 1437 | if (xlat_func(qc, scsicmd)) |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1438 | goto early_finish; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
| 1440 | /* select device, send command to hardware */ |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 1441 | ata_qc_issue(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
| 1443 | VPRINTK("EXIT\n"); |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 1444 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1446 | early_finish: |
| 1447 | ata_qc_free(qc); |
| 1448 | done(cmd); |
| 1449 | DPRINTK("EXIT - early finish (good or error)\n"); |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 1450 | return 0; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1451 | |
| 1452 | err_did: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | ata_qc_free(qc); |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1454 | err_mem: |
| 1455 | cmd->result = (DID_ERROR << 16); |
| 1456 | done(cmd); |
| 1457 | DPRINTK("EXIT - internal\n"); |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 1458 | return 0; |
Tejun Heo | 3dc1d88 | 2006-05-15 21:03:45 +0900 | [diff] [blame] | 1459 | |
| 1460 | defer: |
| 1461 | DPRINTK("EXIT - defer\n"); |
| 1462 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
| 1465 | /** |
| 1466 | * ata_scsi_rbuf_get - Map response buffer. |
| 1467 | * @cmd: SCSI command containing buffer to be mapped. |
| 1468 | * @buf_out: Pointer to mapped area. |
| 1469 | * |
| 1470 | * Maps buffer contained within SCSI command @cmd. |
| 1471 | * |
| 1472 | * LOCKING: |
| 1473 | * spin_lock_irqsave(host_set lock) |
| 1474 | * |
| 1475 | * RETURNS: |
| 1476 | * Length of response buffer. |
| 1477 | */ |
| 1478 | |
| 1479 | static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out) |
| 1480 | { |
| 1481 | u8 *buf; |
| 1482 | unsigned int buflen; |
| 1483 | |
| 1484 | if (cmd->use_sg) { |
| 1485 | struct scatterlist *sg; |
| 1486 | |
| 1487 | sg = (struct scatterlist *) cmd->request_buffer; |
| 1488 | buf = kmap_atomic(sg->page, KM_USER0) + sg->offset; |
| 1489 | buflen = sg->length; |
| 1490 | } else { |
| 1491 | buf = cmd->request_buffer; |
| 1492 | buflen = cmd->request_bufflen; |
| 1493 | } |
| 1494 | |
| 1495 | *buf_out = buf; |
| 1496 | return buflen; |
| 1497 | } |
| 1498 | |
| 1499 | /** |
| 1500 | * ata_scsi_rbuf_put - Unmap response buffer. |
| 1501 | * @cmd: SCSI command containing buffer to be unmapped. |
| 1502 | * @buf: buffer to unmap |
| 1503 | * |
| 1504 | * Unmaps response buffer contained within @cmd. |
| 1505 | * |
| 1506 | * LOCKING: |
| 1507 | * spin_lock_irqsave(host_set lock) |
| 1508 | */ |
| 1509 | |
| 1510 | static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) |
| 1511 | { |
| 1512 | if (cmd->use_sg) { |
| 1513 | struct scatterlist *sg; |
| 1514 | |
| 1515 | sg = (struct scatterlist *) cmd->request_buffer; |
| 1516 | kunmap_atomic(buf - sg->offset, KM_USER0); |
| 1517 | } |
| 1518 | } |
| 1519 | |
| 1520 | /** |
| 1521 | * ata_scsi_rbuf_fill - wrapper for SCSI command simulators |
| 1522 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1523 | * @actor: Callback hook for desired SCSI command simulator |
| 1524 | * |
| 1525 | * Takes care of the hard work of simulating a SCSI command... |
| 1526 | * Mapping the response buffer, calling the command's handler, |
| 1527 | * and handling the handler's return value. This return value |
| 1528 | * indicates whether the handler wishes the SCSI command to be |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1529 | * completed successfully (0), or not (in which case cmd->result |
| 1530 | * and sense buffer are assumed to be set). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | * |
| 1532 | * LOCKING: |
| 1533 | * spin_lock_irqsave(host_set lock) |
| 1534 | */ |
| 1535 | |
| 1536 | void ata_scsi_rbuf_fill(struct ata_scsi_args *args, |
| 1537 | unsigned int (*actor) (struct ata_scsi_args *args, |
| 1538 | u8 *rbuf, unsigned int buflen)) |
| 1539 | { |
| 1540 | u8 *rbuf; |
| 1541 | unsigned int buflen, rc; |
| 1542 | struct scsi_cmnd *cmd = args->cmd; |
| 1543 | |
| 1544 | buflen = ata_scsi_rbuf_get(cmd, &rbuf); |
| 1545 | memset(rbuf, 0, buflen); |
| 1546 | rc = actor(args, rbuf, buflen); |
| 1547 | ata_scsi_rbuf_put(cmd, rbuf); |
| 1548 | |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1549 | if (rc == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | cmd->result = SAM_STAT_GOOD; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1551 | args->done(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | } |
| 1553 | |
| 1554 | /** |
| 1555 | * ata_scsiop_inq_std - Simulate INQUIRY command |
| 1556 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1557 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1558 | * @buflen: Response buffer length. |
| 1559 | * |
| 1560 | * Returns standard device identification data associated |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1561 | * with non-VPD INQUIRY command output. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | * |
| 1563 | * LOCKING: |
| 1564 | * spin_lock_irqsave(host_set lock) |
| 1565 | */ |
| 1566 | |
| 1567 | unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, |
| 1568 | unsigned int buflen) |
| 1569 | { |
| 1570 | u8 hdr[] = { |
| 1571 | TYPE_DISK, |
| 1572 | 0, |
| 1573 | 0x5, /* claim SPC-3 version compatibility */ |
| 1574 | 2, |
| 1575 | 95 - 4 |
| 1576 | }; |
| 1577 | |
| 1578 | /* set scsi removeable (RMB) bit per ata bit */ |
| 1579 | if (ata_id_removeable(args->id)) |
| 1580 | hdr[1] |= (1 << 7); |
| 1581 | |
| 1582 | VPRINTK("ENTER\n"); |
| 1583 | |
| 1584 | memcpy(rbuf, hdr, sizeof(hdr)); |
| 1585 | |
| 1586 | if (buflen > 35) { |
| 1587 | memcpy(&rbuf[8], "ATA ", 8); |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1588 | ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); |
| 1589 | ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | if (rbuf[32] == 0 || rbuf[32] == ' ') |
| 1591 | memcpy(&rbuf[32], "n/a ", 4); |
| 1592 | } |
| 1593 | |
| 1594 | if (buflen > 63) { |
| 1595 | const u8 versions[] = { |
| 1596 | 0x60, /* SAM-3 (no version claimed) */ |
| 1597 | |
| 1598 | 0x03, |
| 1599 | 0x20, /* SBC-2 (no version claimed) */ |
| 1600 | |
| 1601 | 0x02, |
| 1602 | 0x60 /* SPC-3 (no version claimed) */ |
| 1603 | }; |
| 1604 | |
| 1605 | memcpy(rbuf + 59, versions, sizeof(versions)); |
| 1606 | } |
| 1607 | |
| 1608 | return 0; |
| 1609 | } |
| 1610 | |
| 1611 | /** |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1612 | * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1614 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1615 | * @buflen: Response buffer length. |
| 1616 | * |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1617 | * Returns list of inquiry VPD pages available. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | * |
| 1619 | * LOCKING: |
| 1620 | * spin_lock_irqsave(host_set lock) |
| 1621 | */ |
| 1622 | |
| 1623 | unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf, |
| 1624 | unsigned int buflen) |
| 1625 | { |
| 1626 | const u8 pages[] = { |
| 1627 | 0x00, /* page 0x00, this page */ |
| 1628 | 0x80, /* page 0x80, unit serial no page */ |
| 1629 | 0x83 /* page 0x83, device ident page */ |
| 1630 | }; |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1631 | rbuf[3] = sizeof(pages); /* number of supported VPD pages */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | |
| 1633 | if (buflen > 6) |
| 1634 | memcpy(rbuf + 4, pages, sizeof(pages)); |
| 1635 | |
| 1636 | return 0; |
| 1637 | } |
| 1638 | |
| 1639 | /** |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1640 | * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1642 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1643 | * @buflen: Response buffer length. |
| 1644 | * |
| 1645 | * Returns ATA device serial number. |
| 1646 | * |
| 1647 | * LOCKING: |
| 1648 | * spin_lock_irqsave(host_set lock) |
| 1649 | */ |
| 1650 | |
| 1651 | unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf, |
| 1652 | unsigned int buflen) |
| 1653 | { |
| 1654 | const u8 hdr[] = { |
| 1655 | 0, |
| 1656 | 0x80, /* this page code */ |
| 1657 | 0, |
| 1658 | ATA_SERNO_LEN, /* page len */ |
| 1659 | }; |
| 1660 | memcpy(rbuf, hdr, sizeof(hdr)); |
| 1661 | |
| 1662 | if (buflen > (ATA_SERNO_LEN + 4 - 1)) |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1663 | ata_id_string(args->id, (unsigned char *) &rbuf[4], |
| 1664 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | |
| 1666 | return 0; |
| 1667 | } |
| 1668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | /** |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1670 | * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1672 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1673 | * @buflen: Response buffer length. |
| 1674 | * |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1675 | * Yields two logical unit device identification designators: |
| 1676 | * - vendor specific ASCII containing the ATA serial number |
| 1677 | * - SAT defined "t10 vendor id based" containing ASCII vendor |
| 1678 | * name ("ATA "), model and serial numbers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | * |
| 1680 | * LOCKING: |
| 1681 | * spin_lock_irqsave(host_set lock) |
| 1682 | */ |
| 1683 | |
| 1684 | unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, |
| 1685 | unsigned int buflen) |
| 1686 | { |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1687 | int num; |
| 1688 | const int sat_model_serial_desc_len = 68; |
| 1689 | const int ata_model_byte_len = 40; |
| 1690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | rbuf[1] = 0x83; /* this page code */ |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1692 | num = 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1694 | if (buflen > (ATA_SERNO_LEN + num + 3)) { |
| 1695 | /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1696 | rbuf[num + 0] = 2; |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1697 | rbuf[num + 3] = ATA_SERNO_LEN; |
| 1698 | num += 4; |
| 1699 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
| 1700 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); |
| 1701 | num += ATA_SERNO_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | } |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1703 | if (buflen > (sat_model_serial_desc_len + num + 3)) { |
| 1704 | /* SAT defined lu model and serial numbers descriptor */ |
| 1705 | /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */ |
Jeff Garzik | 2e9edbf | 2006-03-24 09:56:57 -0500 | [diff] [blame] | 1706 | rbuf[num + 0] = 2; |
| 1707 | rbuf[num + 1] = 1; |
Jeff Garzik | b142eb6 | 2006-03-21 20:37:47 -0500 | [diff] [blame] | 1708 | rbuf[num + 3] = sat_model_serial_desc_len; |
| 1709 | num += 4; |
| 1710 | memcpy(rbuf + num, "ATA ", 8); |
| 1711 | num += 8; |
| 1712 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
| 1713 | ATA_ID_PROD_OFS, ata_model_byte_len); |
| 1714 | num += ata_model_byte_len; |
| 1715 | ata_id_string(args->id, (unsigned char *) rbuf + num, |
| 1716 | ATA_ID_SERNO_OFS, ATA_SERNO_LEN); |
| 1717 | num += ATA_SERNO_LEN; |
| 1718 | } |
| 1719 | rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | return 0; |
| 1721 | } |
| 1722 | |
| 1723 | /** |
Jeff Garzik | 0cba632 | 2005-05-30 19:49:12 -0400 | [diff] [blame] | 1724 | * ata_scsiop_noop - Command handler that simply returns success. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1726 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1727 | * @buflen: Response buffer length. |
| 1728 | * |
| 1729 | * No operation. Simply returns success to caller, to indicate |
| 1730 | * that the caller should successfully complete this SCSI command. |
| 1731 | * |
| 1732 | * LOCKING: |
| 1733 | * spin_lock_irqsave(host_set lock) |
| 1734 | */ |
| 1735 | |
| 1736 | unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf, |
| 1737 | unsigned int buflen) |
| 1738 | { |
| 1739 | VPRINTK("ENTER\n"); |
| 1740 | return 0; |
| 1741 | } |
| 1742 | |
| 1743 | /** |
| 1744 | * ata_msense_push - Push data onto MODE SENSE data output buffer |
| 1745 | * @ptr_io: (input/output) Location to store more output data |
| 1746 | * @last: End of output data buffer |
| 1747 | * @buf: Pointer to BLOB being added to output buffer |
| 1748 | * @buflen: Length of BLOB |
| 1749 | * |
| 1750 | * Store MODE SENSE data on an output buffer. |
| 1751 | * |
| 1752 | * LOCKING: |
| 1753 | * None. |
| 1754 | */ |
| 1755 | |
| 1756 | static void ata_msense_push(u8 **ptr_io, const u8 *last, |
| 1757 | const u8 *buf, unsigned int buflen) |
| 1758 | { |
| 1759 | u8 *ptr = *ptr_io; |
| 1760 | |
| 1761 | if ((ptr + buflen - 1) > last) |
| 1762 | return; |
| 1763 | |
| 1764 | memcpy(ptr, buf, buflen); |
| 1765 | |
| 1766 | ptr += buflen; |
| 1767 | |
| 1768 | *ptr_io = ptr; |
| 1769 | } |
| 1770 | |
| 1771 | /** |
| 1772 | * ata_msense_caching - Simulate MODE SENSE caching info page |
| 1773 | * @id: device IDENTIFY data |
| 1774 | * @ptr_io: (input/output) Location to store more output data |
| 1775 | * @last: End of output data buffer |
| 1776 | * |
| 1777 | * Generate a caching info page, which conditionally indicates |
| 1778 | * write caching to the SCSI layer, depending on device |
| 1779 | * capabilities. |
| 1780 | * |
| 1781 | * LOCKING: |
| 1782 | * None. |
| 1783 | */ |
| 1784 | |
| 1785 | static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io, |
| 1786 | const u8 *last) |
| 1787 | { |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1788 | u8 page[CACHE_MPAGE_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1790 | memcpy(page, def_cache_mpage, sizeof(page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | if (ata_id_wcache_enabled(id)) |
| 1792 | page[2] |= (1 << 2); /* write cache enable */ |
| 1793 | if (!ata_id_rahead_enabled(id)) |
| 1794 | page[12] |= (1 << 5); /* disable read ahead */ |
| 1795 | |
| 1796 | ata_msense_push(ptr_io, last, page, sizeof(page)); |
| 1797 | return sizeof(page); |
| 1798 | } |
| 1799 | |
| 1800 | /** |
| 1801 | * ata_msense_ctl_mode - Simulate MODE SENSE control mode page |
| 1802 | * @dev: Device associated with this MODE SENSE command |
| 1803 | * @ptr_io: (input/output) Location to store more output data |
| 1804 | * @last: End of output data buffer |
| 1805 | * |
| 1806 | * Generate a generic MODE SENSE control mode page. |
| 1807 | * |
| 1808 | * LOCKING: |
| 1809 | * None. |
| 1810 | */ |
| 1811 | |
| 1812 | static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last) |
| 1813 | { |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1814 | ata_msense_push(ptr_io, last, def_control_mpage, |
| 1815 | sizeof(def_control_mpage)); |
| 1816 | return sizeof(def_control_mpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | } |
| 1818 | |
| 1819 | /** |
| 1820 | * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page |
| 1821 | * @dev: Device associated with this MODE SENSE command |
| 1822 | * @ptr_io: (input/output) Location to store more output data |
| 1823 | * @last: End of output data buffer |
| 1824 | * |
| 1825 | * Generate a generic MODE SENSE r/w error recovery page. |
| 1826 | * |
| 1827 | * LOCKING: |
| 1828 | * None. |
| 1829 | */ |
| 1830 | |
| 1831 | static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last) |
| 1832 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1834 | ata_msense_push(ptr_io, last, def_rw_recovery_mpage, |
| 1835 | sizeof(def_rw_recovery_mpage)); |
| 1836 | return sizeof(def_rw_recovery_mpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | } |
| 1838 | |
Jens Axboe | 48bdc8e | 2006-01-30 16:09:35 +0100 | [diff] [blame] | 1839 | /* |
| 1840 | * We can turn this into a real blacklist if it's needed, for now just |
| 1841 | * blacklist any Maxtor BANC1G10 revision firmware |
| 1842 | */ |
| 1843 | static int ata_dev_supports_fua(u16 *id) |
| 1844 | { |
| 1845 | unsigned char model[41], fw[9]; |
| 1846 | |
Jeff Garzik | c3c013a | 2006-02-27 22:31:19 -0500 | [diff] [blame] | 1847 | if (!libata_fua) |
| 1848 | return 0; |
Jens Axboe | 48bdc8e | 2006-01-30 16:09:35 +0100 | [diff] [blame] | 1849 | if (!ata_id_has_fua(id)) |
| 1850 | return 0; |
| 1851 | |
Tejun Heo | 6a62a04 | 2006-02-13 10:02:46 +0900 | [diff] [blame] | 1852 | ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model)); |
| 1853 | ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw)); |
Jens Axboe | 48bdc8e | 2006-01-30 16:09:35 +0100 | [diff] [blame] | 1854 | |
Tejun Heo | 2e02671 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1855 | if (strcmp(model, "Maxtor")) |
Jens Axboe | 48bdc8e | 2006-01-30 16:09:35 +0100 | [diff] [blame] | 1856 | return 1; |
Tejun Heo | 2e02671 | 2006-02-12 22:47:04 +0900 | [diff] [blame] | 1857 | if (strcmp(fw, "BANC1G10")) |
Jens Axboe | 48bdc8e | 2006-01-30 16:09:35 +0100 | [diff] [blame] | 1858 | return 1; |
| 1859 | |
| 1860 | return 0; /* blacklisted */ |
| 1861 | } |
| 1862 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | /** |
| 1864 | * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands |
| 1865 | * @args: device IDENTIFY data / SCSI command of interest. |
| 1866 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 1867 | * @buflen: Response buffer length. |
| 1868 | * |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1869 | * Simulate MODE SENSE commands. Assume this is invoked for direct |
| 1870 | * access devices (e.g. disks) only. There should be no block |
| 1871 | * descriptor for other device types. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | * |
| 1873 | * LOCKING: |
| 1874 | * spin_lock_irqsave(host_set lock) |
| 1875 | */ |
| 1876 | |
| 1877 | unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, |
| 1878 | unsigned int buflen) |
| 1879 | { |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1880 | struct ata_device *dev = args->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | u8 *scsicmd = args->cmd->cmnd, *p, *last; |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1882 | const u8 sat_blk_desc[] = { |
| 1883 | 0, 0, 0, 0, /* number of blocks: sat unspecified */ |
| 1884 | 0, |
| 1885 | 0, 0x2, 0x0 /* block length: 512 bytes */ |
| 1886 | }; |
| 1887 | u8 pg, spg; |
| 1888 | unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1889 | u8 dpofua; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | |
| 1891 | VPRINTK("ENTER\n"); |
| 1892 | |
| 1893 | six_byte = (scsicmd[0] == MODE_SENSE); |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1894 | ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */ |
| 1895 | /* |
| 1896 | * LLBA bit in msense(10) ignored (compliant) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | */ |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1898 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | page_control = scsicmd[2] >> 6; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1900 | switch (page_control) { |
| 1901 | case 0: /* current */ |
| 1902 | break; /* supported */ |
| 1903 | case 3: /* saved */ |
| 1904 | goto saving_not_supp; |
| 1905 | case 1: /* changeable */ |
| 1906 | case 2: /* defaults */ |
| 1907 | default: |
| 1908 | goto invalid_fld; |
| 1909 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1911 | if (six_byte) { |
| 1912 | output_len = 4 + (ebd ? 8 : 0); |
| 1913 | alloc_len = scsicmd[4]; |
| 1914 | } else { |
| 1915 | output_len = 8 + (ebd ? 8 : 0); |
| 1916 | alloc_len = (scsicmd[7] << 8) + scsicmd[8]; |
| 1917 | } |
| 1918 | minlen = (alloc_len < buflen) ? alloc_len : buflen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | |
| 1920 | p = rbuf + output_len; |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1921 | last = rbuf + minlen - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1923 | pg = scsicmd[2] & 0x3f; |
| 1924 | spg = scsicmd[3]; |
| 1925 | /* |
| 1926 | * No mode subpages supported (yet) but asking for _all_ |
| 1927 | * subpages may be valid |
| 1928 | */ |
| 1929 | if (spg && (spg != ALL_SUB_MPAGES)) |
| 1930 | goto invalid_fld; |
| 1931 | |
| 1932 | switch(pg) { |
| 1933 | case RW_RECOVERY_MPAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | output_len += ata_msense_rw_recovery(&p, last); |
| 1935 | break; |
| 1936 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1937 | case CACHE_MPAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | output_len += ata_msense_caching(args->id, &p, last); |
| 1939 | break; |
| 1940 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1941 | case CONTROL_MPAGE: { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | output_len += ata_msense_ctl_mode(&p, last); |
| 1943 | break; |
| 1944 | } |
| 1945 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1946 | case ALL_MPAGES: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | output_len += ata_msense_rw_recovery(&p, last); |
| 1948 | output_len += ata_msense_caching(args->id, &p, last); |
| 1949 | output_len += ata_msense_ctl_mode(&p, last); |
| 1950 | break; |
| 1951 | |
| 1952 | default: /* invalid page code */ |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1953 | goto invalid_fld; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | } |
| 1955 | |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1956 | if (minlen < 1) |
| 1957 | return 0; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1958 | |
| 1959 | dpofua = 0; |
Alan Cox | f79d409 | 2006-05-22 16:55:11 +0100 | [diff] [blame] | 1960 | if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) && |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1961 | (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count)) |
| 1962 | dpofua = 1 << 4; |
| 1963 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | if (six_byte) { |
| 1965 | output_len--; |
| 1966 | rbuf[0] = output_len; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1967 | if (minlen > 2) |
| 1968 | rbuf[2] |= dpofua; |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1969 | if (ebd) { |
| 1970 | if (minlen > 3) |
| 1971 | rbuf[3] = sizeof(sat_blk_desc); |
| 1972 | if (minlen > 11) |
| 1973 | memcpy(rbuf + 4, sat_blk_desc, |
| 1974 | sizeof(sat_blk_desc)); |
| 1975 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | } else { |
| 1977 | output_len -= 2; |
| 1978 | rbuf[0] = output_len >> 8; |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1979 | if (minlen > 1) |
| 1980 | rbuf[1] = output_len; |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 1981 | if (minlen > 3) |
| 1982 | rbuf[3] |= dpofua; |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 1983 | if (ebd) { |
| 1984 | if (minlen > 7) |
| 1985 | rbuf[7] = sizeof(sat_blk_desc); |
| 1986 | if (minlen > 15) |
| 1987 | memcpy(rbuf + 8, sat_blk_desc, |
| 1988 | sizeof(sat_blk_desc)); |
| 1989 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | return 0; |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 1992 | |
| 1993 | invalid_fld: |
| 1994 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); |
| 1995 | /* "Invalid field in cbd" */ |
| 1996 | return 1; |
| 1997 | |
| 1998 | saving_not_supp: |
| 1999 | ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); |
| 2000 | /* "Saving parameters not supported" */ |
| 2001 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | } |
| 2003 | |
| 2004 | /** |
| 2005 | * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands |
| 2006 | * @args: device IDENTIFY data / SCSI command of interest. |
| 2007 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 2008 | * @buflen: Response buffer length. |
| 2009 | * |
| 2010 | * Simulate READ CAPACITY commands. |
| 2011 | * |
| 2012 | * LOCKING: |
| 2013 | * spin_lock_irqsave(host_set lock) |
| 2014 | */ |
| 2015 | |
| 2016 | unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, |
| 2017 | unsigned int buflen) |
| 2018 | { |
| 2019 | u64 n_sectors; |
| 2020 | u32 tmp; |
| 2021 | |
| 2022 | VPRINTK("ENTER\n"); |
| 2023 | |
Albert Lee | 8bf62ec | 2005-05-12 15:29:42 -0400 | [diff] [blame] | 2024 | if (ata_id_has_lba(args->id)) { |
| 2025 | if (ata_id_has_lba48(args->id)) |
| 2026 | n_sectors = ata_id_u64(args->id, 100); |
| 2027 | else |
| 2028 | n_sectors = ata_id_u32(args->id, 60); |
| 2029 | } else { |
| 2030 | /* CHS default translation */ |
| 2031 | n_sectors = args->id[1] * args->id[3] * args->id[6]; |
| 2032 | |
| 2033 | if (ata_id_current_chs_valid(args->id)) |
| 2034 | /* CHS current translation */ |
| 2035 | n_sectors = ata_id_u32(args->id, 57); |
| 2036 | } |
| 2037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | n_sectors--; /* ATA TotalUserSectors - 1 */ |
| 2039 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | if (args->cmd->cmnd[0] == READ_CAPACITY) { |
Philip Pokorny | 0c144d0 | 2005-05-28 01:24:47 -0700 | [diff] [blame] | 2041 | if( n_sectors >= 0xffffffffULL ) |
| 2042 | tmp = 0xffffffff ; /* Return max count on overflow */ |
| 2043 | else |
| 2044 | tmp = n_sectors ; |
| 2045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | /* sector count, 32-bit */ |
| 2047 | rbuf[0] = tmp >> (8 * 3); |
| 2048 | rbuf[1] = tmp >> (8 * 2); |
| 2049 | rbuf[2] = tmp >> (8 * 1); |
| 2050 | rbuf[3] = tmp; |
| 2051 | |
| 2052 | /* sector size */ |
| 2053 | tmp = ATA_SECT_SIZE; |
| 2054 | rbuf[6] = tmp >> 8; |
| 2055 | rbuf[7] = tmp; |
| 2056 | |
| 2057 | } else { |
| 2058 | /* sector count, 64-bit */ |
Philip Pokorny | 0c144d0 | 2005-05-28 01:24:47 -0700 | [diff] [blame] | 2059 | tmp = n_sectors >> (8 * 4); |
| 2060 | rbuf[2] = tmp >> (8 * 3); |
| 2061 | rbuf[3] = tmp >> (8 * 2); |
| 2062 | rbuf[4] = tmp >> (8 * 1); |
| 2063 | rbuf[5] = tmp; |
| 2064 | tmp = n_sectors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | rbuf[6] = tmp >> (8 * 3); |
| 2066 | rbuf[7] = tmp >> (8 * 2); |
| 2067 | rbuf[8] = tmp >> (8 * 1); |
| 2068 | rbuf[9] = tmp; |
| 2069 | |
| 2070 | /* sector size */ |
| 2071 | tmp = ATA_SECT_SIZE; |
| 2072 | rbuf[12] = tmp >> 8; |
| 2073 | rbuf[13] = tmp; |
| 2074 | } |
| 2075 | |
| 2076 | return 0; |
| 2077 | } |
| 2078 | |
| 2079 | /** |
| 2080 | * ata_scsiop_report_luns - Simulate REPORT LUNS command |
| 2081 | * @args: device IDENTIFY data / SCSI command of interest. |
| 2082 | * @rbuf: Response buffer, to which simulated SCSI cmd output is sent. |
| 2083 | * @buflen: Response buffer length. |
| 2084 | * |
| 2085 | * Simulate REPORT LUNS command. |
| 2086 | * |
| 2087 | * LOCKING: |
| 2088 | * spin_lock_irqsave(host_set lock) |
| 2089 | */ |
| 2090 | |
| 2091 | unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, |
| 2092 | unsigned int buflen) |
| 2093 | { |
| 2094 | VPRINTK("ENTER\n"); |
| 2095 | rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */ |
| 2096 | |
| 2097 | return 0; |
| 2098 | } |
| 2099 | |
| 2100 | /** |
Douglas Gilbert | 845c583 | 2005-10-09 08:55:41 -0400 | [diff] [blame] | 2101 | * ata_scsi_set_sense - Set SCSI sense data and status |
| 2102 | * @cmd: SCSI request to be handled |
| 2103 | * @sk: SCSI-defined sense key |
| 2104 | * @asc: SCSI-defined additional sense code |
| 2105 | * @ascq: SCSI-defined additional sense code qualifier |
| 2106 | * |
| 2107 | * Helper function that builds a valid fixed format, current |
| 2108 | * response code and the given sense key (sk), additional sense |
| 2109 | * code (asc) and additional sense code qualifier (ascq) with |
| 2110 | * a SCSI command status of %SAM_STAT_CHECK_CONDITION and |
| 2111 | * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . |
| 2112 | * |
| 2113 | * LOCKING: |
| 2114 | * Not required |
| 2115 | */ |
| 2116 | |
| 2117 | void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) |
| 2118 | { |
| 2119 | cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
| 2120 | |
| 2121 | cmd->sense_buffer[0] = 0x70; /* fixed format, current */ |
| 2122 | cmd->sense_buffer[2] = sk; |
| 2123 | cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ |
| 2124 | cmd->sense_buffer[12] = asc; |
| 2125 | cmd->sense_buffer[13] = ascq; |
| 2126 | } |
| 2127 | |
| 2128 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | * ata_scsi_badcmd - End a SCSI request with an error |
| 2130 | * @cmd: SCSI request to be handled |
| 2131 | * @done: SCSI command completion function |
| 2132 | * @asc: SCSI-defined additional sense code |
| 2133 | * @ascq: SCSI-defined additional sense code qualifier |
| 2134 | * |
| 2135 | * Helper function that completes a SCSI command with |
| 2136 | * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST |
| 2137 | * and the specified additional sense codes. |
| 2138 | * |
| 2139 | * LOCKING: |
| 2140 | * spin_lock_irqsave(host_set lock) |
| 2141 | */ |
| 2142 | |
| 2143 | void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) |
| 2144 | { |
| 2145 | DPRINTK("ENTER\n"); |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2146 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | |
| 2148 | done(cmd); |
| 2149 | } |
| 2150 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2151 | static void atapi_sense_complete(struct ata_queued_cmd *qc) |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2152 | { |
Tejun Heo | 74e6c8c | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2153 | if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2154 | /* FIXME: not quite right; we don't want the |
| 2155 | * translation of taskfile registers into |
| 2156 | * a sense descriptors, since that's only |
| 2157 | * correct for ATA, not ATAPI |
| 2158 | */ |
| 2159 | ata_gen_ata_desc_sense(qc); |
Tejun Heo | 74e6c8c | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2160 | } |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2161 | |
| 2162 | qc->scsidone(qc->scsicmd); |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2163 | ata_qc_free(qc); |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2164 | } |
| 2165 | |
| 2166 | /* is it pointless to prefer PIO for "safety reasons"? */ |
| 2167 | static inline int ata_pio_use_silly(struct ata_port *ap) |
| 2168 | { |
| 2169 | return (ap->flags & ATA_FLAG_PIO_DMA); |
| 2170 | } |
| 2171 | |
| 2172 | static void atapi_request_sense(struct ata_queued_cmd *qc) |
| 2173 | { |
| 2174 | struct ata_port *ap = qc->ap; |
| 2175 | struct scsi_cmnd *cmd = qc->scsicmd; |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2176 | |
| 2177 | DPRINTK("ATAPI request sense\n"); |
| 2178 | |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2179 | /* FIXME: is this needed? */ |
| 2180 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); |
| 2181 | |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2182 | ap->ops->tf_read(ap, &qc->tf); |
| 2183 | |
| 2184 | /* fill these in, for the case where they are -not- overwritten */ |
| 2185 | cmd->sense_buffer[0] = 0x70; |
| 2186 | cmd->sense_buffer[2] = qc->tf.feature >> 4; |
| 2187 | |
| 2188 | ata_qc_reinit(qc); |
| 2189 | |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2190 | ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); |
| 2191 | qc->dma_dir = DMA_FROM_DEVICE; |
| 2192 | |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 2193 | memset(&qc->cdb, 0, qc->dev->cdb_len); |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2194 | qc->cdb[0] = REQUEST_SENSE; |
| 2195 | qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; |
| 2196 | |
| 2197 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| 2198 | qc->tf.command = ATA_CMD_PACKET; |
| 2199 | |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2200 | if (ata_pio_use_silly(ap)) { |
| 2201 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; |
| 2202 | qc->tf.feature |= ATAPI_PKT_DMA; |
| 2203 | } else { |
| 2204 | qc->tf.protocol = ATA_PROT_ATAPI; |
| 2205 | qc->tf.lbam = (8 * 1024) & 0xff; |
| 2206 | qc->tf.lbah = (8 * 1024) >> 8; |
| 2207 | } |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2208 | qc->nbytes = SCSI_SENSE_BUFFERSIZE; |
| 2209 | |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2210 | qc->complete_fn = atapi_sense_complete; |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2211 | |
Tejun Heo | 8e0e694 | 2006-03-31 20:41:11 +0900 | [diff] [blame] | 2212 | ata_qc_issue(qc); |
Jeff Garzik | a939c96 | 2005-10-05 17:09:16 -0400 | [diff] [blame] | 2213 | |
| 2214 | DPRINTK("EXIT\n"); |
| 2215 | } |
| 2216 | |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2217 | static void atapi_qc_complete(struct ata_queued_cmd *qc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | { |
| 2219 | struct scsi_cmnd *cmd = qc->scsicmd; |
Albert Lee | a22e2eb | 2005-12-05 15:38:02 +0800 | [diff] [blame] | 2220 | unsigned int err_mask = qc->err_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 2222 | VPRINTK("ENTER, err_mask 0x%X\n", err_mask); |
Jeff Garzik | e12669e | 2005-10-05 18:39:23 -0400 | [diff] [blame] | 2223 | |
Tejun Heo | 246619d | 2006-05-15 20:58:16 +0900 | [diff] [blame] | 2224 | /* handle completion from new EH */ |
| 2225 | if (unlikely(qc->ap->ops->error_handler && |
| 2226 | (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) { |
| 2227 | |
| 2228 | if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) { |
| 2229 | /* FIXME: not quite right; we don't want the |
| 2230 | * translation of taskfile registers into a |
| 2231 | * sense descriptors, since that's only |
| 2232 | * correct for ATA, not ATAPI |
| 2233 | */ |
| 2234 | ata_gen_ata_desc_sense(qc); |
| 2235 | } |
| 2236 | |
| 2237 | qc->scsicmd->result = SAM_STAT_CHECK_CONDITION; |
| 2238 | qc->scsidone(cmd); |
| 2239 | ata_qc_free(qc); |
| 2240 | return; |
| 2241 | } |
| 2242 | |
| 2243 | /* successful completion or old EH failure path */ |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 2244 | if (unlikely(err_mask & AC_ERR_DEV)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | cmd->result = SAM_STAT_CHECK_CONDITION; |
Jeff Garzik | c6e6e66 | 2005-11-14 14:50:05 -0500 | [diff] [blame] | 2246 | atapi_request_sense(qc); |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2247 | return; |
Tejun Heo | 74e6c8c | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2248 | } else if (unlikely(err_mask)) { |
Jeff Garzik | a7dac44 | 2005-10-30 04:44:42 -0500 | [diff] [blame] | 2249 | /* FIXME: not quite right; we don't want the |
| 2250 | * translation of taskfile registers into |
| 2251 | * a sense descriptors, since that's only |
| 2252 | * correct for ATA, not ATAPI |
| 2253 | */ |
| 2254 | ata_gen_ata_desc_sense(qc); |
Tejun Heo | 74e6c8c | 2006-04-02 18:51:53 +0900 | [diff] [blame] | 2255 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | u8 *scsicmd = cmd->cmnd; |
| 2257 | |
Tony Battersby | fd71da4 | 2005-12-21 16:35:44 -0500 | [diff] [blame] | 2258 | if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | u8 *buf = NULL; |
| 2260 | unsigned int buflen; |
| 2261 | |
| 2262 | buflen = ata_scsi_rbuf_get(cmd, &buf); |
Jeff Garzik | a15dbeb | 2005-10-05 15:02:14 -0400 | [diff] [blame] | 2263 | |
| 2264 | /* ATAPI devices typically report zero for their SCSI version, |
| 2265 | * and sometimes deviate from the spec WRT response data |
| 2266 | * format. If SCSI version is reported as zero like normal, |
| 2267 | * then we make the following fixups: 1) Fake MMC-5 version, |
| 2268 | * to indicate to the Linux scsi midlayer this is a modern |
| 2269 | * device. 2) Ensure response data format / ATAPI information |
| 2270 | * are always correct. |
| 2271 | */ |
Jeff Garzik | a15dbeb | 2005-10-05 15:02:14 -0400 | [diff] [blame] | 2272 | if (buf[2] == 0) { |
| 2273 | buf[2] = 0x5; |
| 2274 | buf[3] = 0x32; |
| 2275 | } |
| 2276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | ata_scsi_rbuf_put(cmd, buf); |
| 2278 | } |
Jeff Garzik | a15dbeb | 2005-10-05 15:02:14 -0400 | [diff] [blame] | 2279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | cmd->result = SAM_STAT_GOOD; |
| 2281 | } |
| 2282 | |
| 2283 | qc->scsidone(cmd); |
Tejun Heo | 77853bf | 2006-01-23 13:09:36 +0900 | [diff] [blame] | 2284 | ata_qc_free(qc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | } |
| 2286 | /** |
| 2287 | * atapi_xlat - Initialize PACKET taskfile |
| 2288 | * @qc: command structure to be initialized |
| 2289 | * @scsicmd: SCSI CDB associated with this PACKET command |
| 2290 | * |
| 2291 | * LOCKING: |
| 2292 | * spin_lock_irqsave(host_set lock) |
| 2293 | * |
| 2294 | * RETURNS: |
| 2295 | * Zero on success, non-zero on failure. |
| 2296 | */ |
| 2297 | |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2298 | static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | { |
| 2300 | struct scsi_cmnd *cmd = qc->scsicmd; |
| 2301 | struct ata_device *dev = qc->dev; |
| 2302 | int using_pio = (dev->flags & ATA_DFLAG_PIO); |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 2303 | int nodata = (cmd->sc_data_direction == DMA_NONE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | |
| 2305 | if (!using_pio) |
| 2306 | /* Check whether ATAPI DMA is safe */ |
| 2307 | if (ata_check_atapi_dma(qc)) |
| 2308 | using_pio = 1; |
| 2309 | |
Tejun Heo | 6e7846e | 2006-02-12 23:32:58 +0900 | [diff] [blame] | 2310 | memcpy(&qc->cdb, scsicmd, dev->cdb_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | |
| 2312 | qc->complete_fn = atapi_qc_complete; |
| 2313 | |
| 2314 | qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 2315 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | qc->tf.flags |= ATA_TFLAG_WRITE; |
| 2317 | DPRINTK("direction: write\n"); |
| 2318 | } |
| 2319 | |
| 2320 | qc->tf.command = ATA_CMD_PACKET; |
| 2321 | |
| 2322 | /* no data, or PIO data xfer */ |
| 2323 | if (using_pio || nodata) { |
| 2324 | if (nodata) |
| 2325 | qc->tf.protocol = ATA_PROT_ATAPI_NODATA; |
| 2326 | else |
| 2327 | qc->tf.protocol = ATA_PROT_ATAPI; |
| 2328 | qc->tf.lbam = (8 * 1024) & 0xff; |
| 2329 | qc->tf.lbah = (8 * 1024) >> 8; |
| 2330 | } |
| 2331 | |
| 2332 | /* DMA data xfer */ |
| 2333 | else { |
| 2334 | qc->tf.protocol = ATA_PROT_ATAPI_DMA; |
| 2335 | qc->tf.feature |= ATAPI_PKT_DMA; |
| 2336 | |
Albert Lee | 95de719 | 2006-04-04 10:57:18 +0800 | [diff] [blame] | 2337 | if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE)) |
| 2338 | /* some SATA bridges need us to indicate data xfer direction */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | qc->tf.feature |= ATAPI_DMADIR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | } |
| 2341 | |
| 2342 | qc->nbytes = cmd->bufflen; |
| 2343 | |
| 2344 | return 0; |
| 2345 | } |
| 2346 | |
Tejun Heo | ab5b3a5 | 2006-05-31 18:27:34 +0900 | [diff] [blame] | 2347 | static struct ata_device * ata_find_dev(struct ata_port *ap, int id) |
| 2348 | { |
| 2349 | if (likely(id < ATA_MAX_DEVICES)) |
| 2350 | return &ap->device[id]; |
| 2351 | return NULL; |
| 2352 | } |
| 2353 | |
| 2354 | static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, |
| 2355 | const struct scsi_device *scsidev) |
| 2356 | { |
| 2357 | /* skip commands not addressed to targets we simulate */ |
| 2358 | if (unlikely(scsidev->channel || scsidev->lun)) |
| 2359 | return NULL; |
| 2360 | |
| 2361 | return ata_find_dev(ap, scsidev->id); |
| 2362 | } |
| 2363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | /** |
| 2365 | * ata_scsi_find_dev - lookup ata_device from scsi_cmnd |
| 2366 | * @ap: ATA port to which the device is attached |
| 2367 | * @scsidev: SCSI device from which we derive the ATA device |
| 2368 | * |
| 2369 | * Given various information provided in struct scsi_cmnd, |
| 2370 | * map that onto an ATA bus, and using that mapping |
| 2371 | * determine which ata_device is associated with the |
| 2372 | * SCSI command to be sent. |
| 2373 | * |
| 2374 | * LOCKING: |
| 2375 | * spin_lock_irqsave(host_set lock) |
| 2376 | * |
| 2377 | * RETURNS: |
| 2378 | * Associated ATA device, or %NULL if not found. |
| 2379 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | static struct ata_device * |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2381 | ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | { |
Tejun Heo | ab5b3a5 | 2006-05-31 18:27:34 +0900 | [diff] [blame] | 2383 | struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2384 | |
Tejun Heo | ab5b3a5 | 2006-05-31 18:27:34 +0900 | [diff] [blame] | 2385 | if (unlikely(!dev || !ata_dev_enabled(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | return NULL; |
| 2387 | |
Jeff Garzik | 5063019 | 2005-12-13 02:29:45 -0500 | [diff] [blame] | 2388 | if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) { |
| 2389 | if (unlikely(dev->class == ATA_DEV_ATAPI)) { |
Tejun Heo | f15a1da | 2006-05-15 20:57:56 +0900 | [diff] [blame] | 2390 | ata_dev_printk(dev, KERN_WARNING, |
| 2391 | "WARNING: ATAPI is %s, device ignored.\n", |
| 2392 | atapi_enabled ? "not supported with this driver" : "disabled"); |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 2393 | return NULL; |
Jeff Garzik | 5063019 | 2005-12-13 02:29:45 -0500 | [diff] [blame] | 2394 | } |
Jeff Garzik | 1623c81 | 2005-08-30 03:37:42 -0400 | [diff] [blame] | 2395 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | |
| 2397 | return dev; |
| 2398 | } |
| 2399 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2400 | /* |
| 2401 | * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value. |
| 2402 | * @byte1: Byte 1 from pass-thru CDB. |
| 2403 | * |
| 2404 | * RETURNS: |
| 2405 | * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise. |
| 2406 | */ |
| 2407 | static u8 |
| 2408 | ata_scsi_map_proto(u8 byte1) |
| 2409 | { |
| 2410 | switch((byte1 & 0x1e) >> 1) { |
| 2411 | case 3: /* Non-data */ |
| 2412 | return ATA_PROT_NODATA; |
| 2413 | |
| 2414 | case 6: /* DMA */ |
| 2415 | return ATA_PROT_DMA; |
| 2416 | |
| 2417 | case 4: /* PIO Data-in */ |
| 2418 | case 5: /* PIO Data-out */ |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2419 | return ATA_PROT_PIO; |
| 2420 | |
| 2421 | case 10: /* Device Reset */ |
| 2422 | case 0: /* Hard Reset */ |
| 2423 | case 1: /* SRST */ |
| 2424 | case 2: /* Bus Idle */ |
| 2425 | case 7: /* Packet */ |
| 2426 | case 8: /* DMA Queued */ |
| 2427 | case 9: /* Device Diagnostic */ |
| 2428 | case 11: /* UDMA Data-in */ |
| 2429 | case 12: /* UDMA Data-Out */ |
| 2430 | case 13: /* FPDMA */ |
| 2431 | default: /* Reserved */ |
| 2432 | break; |
| 2433 | } |
| 2434 | |
| 2435 | return ATA_PROT_UNKNOWN; |
| 2436 | } |
| 2437 | |
| 2438 | /** |
| 2439 | * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile |
| 2440 | * @qc: command structure to be initialized |
Randy Dunlap | 8e8b77d | 2005-11-01 21:29:27 -0800 | [diff] [blame] | 2441 | * @scsicmd: SCSI command to convert |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2442 | * |
| 2443 | * Handles either 12 or 16-byte versions of the CDB. |
| 2444 | * |
| 2445 | * RETURNS: |
| 2446 | * Zero on success, non-zero on failure. |
| 2447 | */ |
| 2448 | static unsigned int |
Douglas Gilbert | 00ac37f | 2005-10-28 15:58:28 -0400 | [diff] [blame] | 2449 | ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2450 | { |
| 2451 | struct ata_taskfile *tf = &(qc->tf); |
| 2452 | struct scsi_cmnd *cmd = qc->scsicmd; |
Alan Cox | f79d409 | 2006-05-22 16:55:11 +0100 | [diff] [blame] | 2453 | struct ata_device *dev = qc->dev; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2454 | |
| 2455 | if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) |
Tejun Heo | 9a40525 | 2005-12-02 11:49:11 +0900 | [diff] [blame] | 2456 | goto invalid_fld; |
Jeff Garzik | 8190bdb | 2006-05-24 01:53:39 -0400 | [diff] [blame] | 2457 | |
Alan Cox | f79d409 | 2006-05-22 16:55:11 +0100 | [diff] [blame] | 2458 | /* We may not issue DMA commands if no DMA mode is set */ |
| 2459 | if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) |
| 2460 | goto invalid_fld; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2461 | |
Albert Lee | f59b0cf | 2006-03-16 17:59:22 +0800 | [diff] [blame] | 2462 | if (scsicmd[1] & 0xe0) |
| 2463 | /* PIO multi not supported yet */ |
| 2464 | goto invalid_fld; |
| 2465 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2466 | /* |
| 2467 | * 12 and 16 byte CDBs use different offsets to |
| 2468 | * provide the various register values. |
| 2469 | */ |
| 2470 | if (scsicmd[0] == ATA_16) { |
| 2471 | /* |
| 2472 | * 16-byte CDB - may contain extended commands. |
| 2473 | * |
| 2474 | * If that is the case, copy the upper byte register values. |
| 2475 | */ |
| 2476 | if (scsicmd[1] & 0x01) { |
| 2477 | tf->hob_feature = scsicmd[3]; |
| 2478 | tf->hob_nsect = scsicmd[5]; |
| 2479 | tf->hob_lbal = scsicmd[7]; |
| 2480 | tf->hob_lbam = scsicmd[9]; |
| 2481 | tf->hob_lbah = scsicmd[11]; |
| 2482 | tf->flags |= ATA_TFLAG_LBA48; |
| 2483 | } else |
| 2484 | tf->flags &= ~ATA_TFLAG_LBA48; |
| 2485 | |
| 2486 | /* |
| 2487 | * Always copy low byte, device and command registers. |
| 2488 | */ |
| 2489 | tf->feature = scsicmd[4]; |
| 2490 | tf->nsect = scsicmd[6]; |
| 2491 | tf->lbal = scsicmd[8]; |
| 2492 | tf->lbam = scsicmd[10]; |
| 2493 | tf->lbah = scsicmd[12]; |
| 2494 | tf->device = scsicmd[13]; |
| 2495 | tf->command = scsicmd[14]; |
| 2496 | } else { |
| 2497 | /* |
| 2498 | * 12-byte CDB - incapable of extended commands. |
| 2499 | */ |
| 2500 | tf->flags &= ~ATA_TFLAG_LBA48; |
| 2501 | |
| 2502 | tf->feature = scsicmd[3]; |
| 2503 | tf->nsect = scsicmd[4]; |
| 2504 | tf->lbal = scsicmd[5]; |
| 2505 | tf->lbam = scsicmd[6]; |
| 2506 | tf->lbah = scsicmd[7]; |
| 2507 | tf->device = scsicmd[8]; |
| 2508 | tf->command = scsicmd[9]; |
| 2509 | } |
Mark Lord | dcc2d1e | 2005-11-13 16:22:06 -0500 | [diff] [blame] | 2510 | /* |
| 2511 | * If slave is possible, enforce correct master/slave bit |
| 2512 | */ |
| 2513 | if (qc->ap->flags & ATA_FLAG_SLAVE_POSS) |
| 2514 | tf->device = qc->dev->devno ? |
| 2515 | tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2516 | |
| 2517 | /* |
| 2518 | * Filter SET_FEATURES - XFER MODE command -- otherwise, |
| 2519 | * SET_FEATURES - XFER MODE must be preceded/succeeded |
| 2520 | * by an update to hardware-specific registers for each |
| 2521 | * controller (i.e. the reason for ->set_piomode(), |
| 2522 | * ->set_dmamode(), and ->post_set_mode() hooks). |
| 2523 | */ |
| 2524 | if ((tf->command == ATA_CMD_SET_FEATURES) |
| 2525 | && (tf->feature == SETFEATURES_XFER)) |
Tejun Heo | 9a40525 | 2005-12-02 11:49:11 +0900 | [diff] [blame] | 2526 | goto invalid_fld; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2527 | |
| 2528 | /* |
| 2529 | * Set flags so that all registers will be written, |
| 2530 | * and pass on write indication (used for PIO/DMA |
| 2531 | * setup.) |
| 2532 | */ |
| 2533 | tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE); |
| 2534 | |
Jeff Garzik | 0274aa2 | 2005-06-22 13:50:56 -0400 | [diff] [blame] | 2535 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2536 | tf->flags |= ATA_TFLAG_WRITE; |
| 2537 | |
| 2538 | /* |
| 2539 | * Set transfer length. |
| 2540 | * |
| 2541 | * TODO: find out if we need to do more here to |
| 2542 | * cover scatter/gather case. |
| 2543 | */ |
| 2544 | qc->nsect = cmd->bufflen / ATA_SECT_SIZE; |
| 2545 | |
Tejun Heo | e61e067 | 2006-05-15 20:57:40 +0900 | [diff] [blame] | 2546 | /* request result TF */ |
| 2547 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
| 2548 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2549 | return 0; |
Tejun Heo | 9a40525 | 2005-12-02 11:49:11 +0900 | [diff] [blame] | 2550 | |
| 2551 | invalid_fld: |
| 2552 | ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00); |
| 2553 | /* "Invalid field in cdb" */ |
| 2554 | return 1; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2555 | } |
| 2556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | /** |
| 2558 | * ata_get_xlat_func - check if SCSI to ATA translation is possible |
| 2559 | * @dev: ATA device |
| 2560 | * @cmd: SCSI command opcode to consider |
| 2561 | * |
| 2562 | * Look up the SCSI command given, and determine whether the |
| 2563 | * SCSI command is to be translated or simulated. |
| 2564 | * |
| 2565 | * RETURNS: |
| 2566 | * Pointer to translation function if possible, %NULL if not. |
| 2567 | */ |
| 2568 | |
| 2569 | static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) |
| 2570 | { |
| 2571 | switch (cmd) { |
| 2572 | case READ_6: |
| 2573 | case READ_10: |
| 2574 | case READ_16: |
| 2575 | |
| 2576 | case WRITE_6: |
| 2577 | case WRITE_10: |
| 2578 | case WRITE_16: |
| 2579 | return ata_scsi_rw_xlat; |
| 2580 | |
| 2581 | case SYNCHRONIZE_CACHE: |
| 2582 | if (ata_try_flush_cache(dev)) |
| 2583 | return ata_scsi_flush_xlat; |
| 2584 | break; |
| 2585 | |
| 2586 | case VERIFY: |
| 2587 | case VERIFY_16: |
| 2588 | return ata_scsi_verify_xlat; |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2589 | |
| 2590 | case ATA_12: |
| 2591 | case ATA_16: |
| 2592 | return ata_scsi_pass_thru; |
Jeff Garzik | da61396 | 2005-08-29 19:01:43 -0400 | [diff] [blame] | 2593 | |
Douglas Gilbert | 972dcaf | 2005-08-11 03:35:53 -0400 | [diff] [blame] | 2594 | case START_STOP: |
| 2595 | return ata_scsi_start_stop_xlat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | } |
| 2597 | |
| 2598 | return NULL; |
| 2599 | } |
| 2600 | |
| 2601 | /** |
| 2602 | * ata_scsi_dump_cdb - dump SCSI command contents to dmesg |
| 2603 | * @ap: ATA port to which the command was being sent |
| 2604 | * @cmd: SCSI command to dump |
| 2605 | * |
| 2606 | * Prints the contents of a SCSI command via printk(). |
| 2607 | */ |
| 2608 | |
| 2609 | static inline void ata_scsi_dump_cdb(struct ata_port *ap, |
| 2610 | struct scsi_cmnd *cmd) |
| 2611 | { |
| 2612 | #ifdef ATA_DEBUG |
| 2613 | struct scsi_device *scsidev = cmd->device; |
| 2614 | u8 *scsicmd = cmd->cmnd; |
| 2615 | |
| 2616 | DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", |
| 2617 | ap->id, |
| 2618 | scsidev->channel, scsidev->id, scsidev->lun, |
| 2619 | scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3], |
| 2620 | scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7], |
| 2621 | scsicmd[8]); |
| 2622 | #endif |
| 2623 | } |
| 2624 | |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2625 | static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd, |
| 2626 | void (*done)(struct scsi_cmnd *), |
| 2627 | struct ata_device *dev) |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2628 | { |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2629 | int rc = 0; |
| 2630 | |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2631 | if (dev->class == ATA_DEV_ATA) { |
| 2632 | ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, |
| 2633 | cmd->cmnd[0]); |
| 2634 | |
| 2635 | if (xlat_func) |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2636 | rc = ata_scsi_translate(dev, cmd, done, xlat_func); |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2637 | else |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2638 | ata_scsi_simulate(dev, cmd, done); |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2639 | } else |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2640 | rc = ata_scsi_translate(dev, cmd, done, atapi_xlat); |
| 2641 | |
| 2642 | return rc; |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2643 | } |
| 2644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2645 | /** |
| 2646 | * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device |
| 2647 | * @cmd: SCSI command to be sent |
| 2648 | * @done: Completion function, called when command is complete |
| 2649 | * |
| 2650 | * In some cases, this function translates SCSI commands into |
| 2651 | * ATA taskfiles, and queues the taskfiles to be sent to |
| 2652 | * hardware. In other cases, this function simulates a |
| 2653 | * SCSI device by evaluating and responding to certain |
| 2654 | * SCSI commands. This creates the overall effect of |
| 2655 | * ATA and ATAPI devices appearing as SCSI devices. |
| 2656 | * |
| 2657 | * LOCKING: |
| 2658 | * Releases scsi-layer-held lock, and obtains host_set lock. |
| 2659 | * |
| 2660 | * RETURNS: |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2661 | * Return value from __ata_scsi_queuecmd() if @cmd can be queued, |
| 2662 | * 0 otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2664 | int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
| 2665 | { |
| 2666 | struct ata_port *ap; |
| 2667 | struct ata_device *dev; |
| 2668 | struct scsi_device *scsidev = cmd->device; |
Jeff Garzik | 005a5a0 | 2005-10-30 23:31:48 -0500 | [diff] [blame] | 2669 | struct Scsi_Host *shost = scsidev->host; |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2670 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | |
Jeff Garzik | 35bb94b | 2006-04-11 13:12:34 -0400 | [diff] [blame] | 2672 | ap = ata_shost_to_port(shost); |
Jeff Garzik | 005a5a0 | 2005-10-30 23:31:48 -0500 | [diff] [blame] | 2673 | |
| 2674 | spin_unlock(shost->host_lock); |
| 2675 | spin_lock(&ap->host_set->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2676 | |
| 2677 | ata_scsi_dump_cdb(ap, cmd); |
| 2678 | |
| 2679 | dev = ata_scsi_find_dev(ap, scsidev); |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2680 | if (likely(dev)) |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2681 | rc = __ata_scsi_queuecmd(cmd, done, dev); |
Brian King | eb3f0f9 | 2006-03-23 17:30:02 -0600 | [diff] [blame] | 2682 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | cmd->result = (DID_BAD_TARGET << 16); |
| 2684 | done(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | } |
| 2686 | |
Jeff Garzik | 005a5a0 | 2005-10-30 23:31:48 -0500 | [diff] [blame] | 2687 | spin_unlock(&ap->host_set->lock); |
| 2688 | spin_lock(shost->host_lock); |
Tejun Heo | 2115ea9 | 2006-05-15 21:03:39 +0900 | [diff] [blame] | 2689 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | } |
| 2691 | |
| 2692 | /** |
| 2693 | * ata_scsi_simulate - simulate SCSI command on ATA device |
Randy Dunlap | c893a3a | 2006-01-28 13:15:32 -0500 | [diff] [blame] | 2694 | * @dev: the target device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2695 | * @cmd: SCSI command being sent to device. |
| 2696 | * @done: SCSI command completion function. |
| 2697 | * |
| 2698 | * Interprets and directly executes a select list of SCSI commands |
| 2699 | * that can be handled internally. |
| 2700 | * |
| 2701 | * LOCKING: |
| 2702 | * spin_lock_irqsave(host_set lock) |
| 2703 | */ |
| 2704 | |
Tejun Heo | 3373efd | 2006-05-15 20:57:53 +0900 | [diff] [blame] | 2705 | void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | void (*done)(struct scsi_cmnd *)) |
| 2707 | { |
| 2708 | struct ata_scsi_args args; |
Jeff Garzik | 057ace5 | 2005-10-22 14:27:05 -0400 | [diff] [blame] | 2709 | const u8 *scsicmd = cmd->cmnd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | |
Tejun Heo | 9a3dccc | 2006-01-06 09:56:18 +0100 | [diff] [blame] | 2711 | args.dev = dev; |
| 2712 | args.id = dev->id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2713 | args.cmd = cmd; |
| 2714 | args.done = done; |
| 2715 | |
| 2716 | switch(scsicmd[0]) { |
| 2717 | /* no-op's, complete with success */ |
| 2718 | case SYNCHRONIZE_CACHE: |
| 2719 | case REZERO_UNIT: |
| 2720 | case SEEK_6: |
| 2721 | case SEEK_10: |
| 2722 | case TEST_UNIT_READY: |
| 2723 | case FORMAT_UNIT: /* FIXME: correct? */ |
| 2724 | case SEND_DIAGNOSTIC: /* FIXME: correct? */ |
| 2725 | ata_scsi_rbuf_fill(&args, ata_scsiop_noop); |
| 2726 | break; |
| 2727 | |
| 2728 | case INQUIRY: |
| 2729 | if (scsicmd[1] & 2) /* is CmdDt set? */ |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2730 | ata_scsi_invalid_field(cmd, done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ |
| 2732 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); |
| 2733 | else if (scsicmd[2] == 0x00) |
| 2734 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00); |
| 2735 | else if (scsicmd[2] == 0x80) |
| 2736 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80); |
| 2737 | else if (scsicmd[2] == 0x83) |
| 2738 | ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); |
| 2739 | else |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2740 | ata_scsi_invalid_field(cmd, done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | break; |
| 2742 | |
| 2743 | case MODE_SENSE: |
| 2744 | case MODE_SENSE_10: |
| 2745 | ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense); |
| 2746 | break; |
| 2747 | |
| 2748 | case MODE_SELECT: /* unconditionally return */ |
| 2749 | case MODE_SELECT_10: /* bad-field-in-cdb */ |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2750 | ata_scsi_invalid_field(cmd, done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | break; |
| 2752 | |
| 2753 | case READ_CAPACITY: |
| 2754 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
| 2755 | break; |
| 2756 | |
| 2757 | case SERVICE_ACTION_IN: |
| 2758 | if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) |
| 2759 | ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); |
| 2760 | else |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2761 | ata_scsi_invalid_field(cmd, done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | break; |
| 2763 | |
| 2764 | case REPORT_LUNS: |
| 2765 | ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); |
| 2766 | break; |
| 2767 | |
Jeff Garzik | b095518 | 2005-05-12 15:45:22 -0400 | [diff] [blame] | 2768 | /* mandatory commands we haven't implemented yet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | case REQUEST_SENSE: |
| 2770 | |
| 2771 | /* all other commands */ |
| 2772 | default: |
Douglas Gilbert | ae00651 | 2005-10-09 09:09:35 -0400 | [diff] [blame] | 2773 | ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); |
| 2774 | /* "Invalid command operation code" */ |
| 2775 | done(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | break; |
| 2777 | } |
| 2778 | } |
| 2779 | |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 2780 | void ata_scsi_scan_host(struct ata_port *ap) |
| 2781 | { |
| 2782 | unsigned int i; |
| 2783 | |
Tejun Heo | 198e0fe | 2006-04-02 18:51:52 +0900 | [diff] [blame] | 2784 | if (ap->flags & ATA_FLAG_DISABLED) |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 2785 | return; |
| 2786 | |
Jeff Garzik | 3f19ee8 | 2005-10-03 21:36:41 -0400 | [diff] [blame] | 2787 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
Tejun Heo | 3edebac | 2006-05-31 18:27:40 +0900 | [diff] [blame] | 2788 | struct ata_device *dev = &ap->device[i]; |
| 2789 | struct scsi_device *sdev; |
Jeff Garzik | 3f19ee8 | 2005-10-03 21:36:41 -0400 | [diff] [blame] | 2790 | |
Tejun Heo | 3edebac | 2006-05-31 18:27:40 +0900 | [diff] [blame] | 2791 | if (!ata_dev_enabled(dev) || dev->sdev) |
| 2792 | continue; |
| 2793 | |
| 2794 | sdev = __scsi_add_device(ap->host, 0, i, 0, NULL); |
| 2795 | if (!IS_ERR(sdev)) { |
| 2796 | dev->sdev = sdev; |
| 2797 | scsi_device_put(sdev); |
| 2798 | } |
Jeff Garzik | 3f19ee8 | 2005-10-03 21:36:41 -0400 | [diff] [blame] | 2799 | } |
Jeff Garzik | 644dd0c | 2005-10-03 15:55:19 -0400 | [diff] [blame] | 2800 | } |
Tejun Heo | 0ea035a | 2006-05-31 18:28:01 +0900 | [diff] [blame] | 2801 | |
| 2802 | /** |
| 2803 | * ata_scsi_offline_dev - offline attached SCSI device |
| 2804 | * @dev: ATA device to offline attached SCSI device for |
| 2805 | * |
| 2806 | * This function is called from ata_eh_hotplug() and responsible |
| 2807 | * for taking the SCSI device attached to @dev offline. This |
| 2808 | * function is called with host_set lock which protects dev->sdev |
| 2809 | * against clearing. |
| 2810 | * |
| 2811 | * LOCKING: |
| 2812 | * spin_lock_irqsave(host_set lock) |
| 2813 | * |
| 2814 | * RETURNS: |
| 2815 | * 1 if attached SCSI device exists, 0 otherwise. |
| 2816 | */ |
| 2817 | int ata_scsi_offline_dev(struct ata_device *dev) |
| 2818 | { |
| 2819 | if (dev->sdev) { |
| 2820 | scsi_device_set_state(dev->sdev, SDEV_OFFLINE); |
| 2821 | return 1; |
| 2822 | } |
| 2823 | return 0; |
| 2824 | } |
Tejun Heo | 580b210 | 2006-05-31 18:28:05 +0900 | [diff] [blame] | 2825 | |
| 2826 | /** |
| 2827 | * ata_scsi_remove_dev - remove attached SCSI device |
| 2828 | * @dev: ATA device to remove attached SCSI device for |
| 2829 | * |
| 2830 | * This function is called from ata_eh_scsi_hotplug() and |
| 2831 | * responsible for removing the SCSI device attached to @dev. |
| 2832 | * |
| 2833 | * LOCKING: |
| 2834 | * Kernel thread context (may sleep). |
| 2835 | */ |
| 2836 | static void ata_scsi_remove_dev(struct ata_device *dev) |
| 2837 | { |
| 2838 | struct ata_port *ap = dev->ap; |
| 2839 | struct scsi_device *sdev; |
| 2840 | unsigned long flags; |
| 2841 | |
| 2842 | /* Alas, we need to grab scan_mutex to ensure SCSI device |
| 2843 | * state doesn't change underneath us and thus |
| 2844 | * scsi_device_get() always succeeds. The mutex locking can |
| 2845 | * be removed if there is __scsi_device_get() interface which |
| 2846 | * increments reference counts regardless of device state. |
| 2847 | */ |
| 2848 | mutex_lock(&ap->host->scan_mutex); |
| 2849 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2850 | |
| 2851 | /* clearing dev->sdev is protected by host_set lock */ |
| 2852 | sdev = dev->sdev; |
| 2853 | dev->sdev = NULL; |
| 2854 | |
| 2855 | if (sdev) { |
| 2856 | /* If user initiated unplug races with us, sdev can go |
| 2857 | * away underneath us after the host_set lock and |
| 2858 | * scan_mutex are released. Hold onto it. |
| 2859 | */ |
| 2860 | if (scsi_device_get(sdev) == 0) { |
| 2861 | /* The following ensures the attached sdev is |
| 2862 | * offline on return from ata_scsi_offline_dev() |
| 2863 | * regardless it wins or loses the race |
| 2864 | * against this function. |
| 2865 | */ |
| 2866 | scsi_device_set_state(sdev, SDEV_OFFLINE); |
| 2867 | } else { |
| 2868 | WARN_ON(1); |
| 2869 | sdev = NULL; |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2874 | mutex_unlock(&ap->host->scan_mutex); |
| 2875 | |
| 2876 | if (sdev) { |
| 2877 | ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n", |
| 2878 | sdev->sdev_gendev.bus_id); |
| 2879 | |
| 2880 | scsi_remove_device(sdev); |
| 2881 | scsi_device_put(sdev); |
| 2882 | } |
| 2883 | } |
| 2884 | |
| 2885 | /** |
| 2886 | * ata_scsi_hotplug - SCSI part of hotplug |
| 2887 | * @data: Pointer to ATA port to perform SCSI hotplug on |
| 2888 | * |
| 2889 | * Perform SCSI part of hotplug. It's executed from a separate |
| 2890 | * workqueue after EH completes. This is necessary because SCSI |
| 2891 | * hot plugging requires working EH and hot unplugging is |
| 2892 | * synchronized with hot plugging with a mutex. |
| 2893 | * |
| 2894 | * LOCKING: |
| 2895 | * Kernel thread context (may sleep). |
| 2896 | */ |
| 2897 | void ata_scsi_hotplug(void *data) |
| 2898 | { |
| 2899 | struct ata_port *ap = data; |
| 2900 | int i; |
| 2901 | |
| 2902 | if (ap->flags & ATA_FLAG_UNLOADING) { |
| 2903 | DPRINTK("ENTER/EXIT - unloading\n"); |
| 2904 | return; |
| 2905 | } |
| 2906 | |
| 2907 | DPRINTK("ENTER\n"); |
| 2908 | |
| 2909 | /* unplug detached devices */ |
| 2910 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2911 | struct ata_device *dev = &ap->device[i]; |
| 2912 | unsigned long flags; |
| 2913 | |
| 2914 | if (!(dev->flags & ATA_DFLAG_DETACHED)) |
| 2915 | continue; |
| 2916 | |
| 2917 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2918 | dev->flags &= ~ATA_DFLAG_DETACHED; |
| 2919 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2920 | |
| 2921 | ata_scsi_remove_dev(dev); |
| 2922 | } |
| 2923 | |
| 2924 | /* scan for new ones */ |
| 2925 | ata_scsi_scan_host(ap); |
| 2926 | |
| 2927 | /* If we scanned while EH was in progress, scan would have |
| 2928 | * failed silently. Requeue if there are enabled but |
| 2929 | * unattached devices. |
| 2930 | */ |
| 2931 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| 2932 | struct ata_device *dev = &ap->device[i]; |
| 2933 | if (ata_dev_enabled(dev) && !dev->sdev) { |
| 2934 | queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ); |
| 2935 | break; |
| 2936 | } |
| 2937 | } |
| 2938 | |
| 2939 | DPRINTK("EXIT\n"); |
| 2940 | } |
Tejun Heo | 83c47bc | 2006-05-31 18:28:07 +0900 | [diff] [blame^] | 2941 | |
| 2942 | /** |
| 2943 | * ata_scsi_user_scan - indication for user-initiated bus scan |
| 2944 | * @shost: SCSI host to scan |
| 2945 | * @channel: Channel to scan |
| 2946 | * @id: ID to scan |
| 2947 | * @lun: LUN to scan |
| 2948 | * |
| 2949 | * This function is called when user explicitly requests bus |
| 2950 | * scan. Set probe pending flag and invoke EH. |
| 2951 | * |
| 2952 | * LOCKING: |
| 2953 | * SCSI layer (we don't care) |
| 2954 | * |
| 2955 | * RETURNS: |
| 2956 | * Zero. |
| 2957 | */ |
| 2958 | static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, |
| 2959 | unsigned int id, unsigned int lun) |
| 2960 | { |
| 2961 | struct ata_port *ap = ata_shost_to_port(shost); |
| 2962 | unsigned long flags; |
| 2963 | int rc = 0; |
| 2964 | |
| 2965 | if (!ap->ops->error_handler) |
| 2966 | return -EOPNOTSUPP; |
| 2967 | |
| 2968 | if ((channel != SCAN_WILD_CARD && channel != 0) || |
| 2969 | (lun != SCAN_WILD_CARD && lun != 0)) |
| 2970 | return -EINVAL; |
| 2971 | |
| 2972 | spin_lock_irqsave(&ap->host_set->lock, flags); |
| 2973 | |
| 2974 | if (id == SCAN_WILD_CARD) { |
| 2975 | ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; |
| 2976 | ap->eh_info.action |= ATA_EH_SOFTRESET; |
| 2977 | } else { |
| 2978 | struct ata_device *dev = ata_find_dev(ap, id); |
| 2979 | |
| 2980 | if (dev) { |
| 2981 | ap->eh_info.probe_mask |= 1 << dev->devno; |
| 2982 | ap->eh_info.action |= ATA_EH_SOFTRESET; |
| 2983 | } else |
| 2984 | rc = -EINVAL; |
| 2985 | } |
| 2986 | |
| 2987 | if (rc == 0) |
| 2988 | ata_port_schedule_eh(ap); |
| 2989 | |
| 2990 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
| 2991 | |
| 2992 | return rc; |
| 2993 | } |