diff options
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r-- | include/linux/libata.h | 71 |
1 files changed, 54 insertions, 17 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index ed3f26eb5df1..3449de597eff 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h | |||
@@ -213,10 +213,11 @@ enum { | |||
213 | ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ | 213 | ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ |
214 | ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ | 214 | ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ |
215 | ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ | 215 | ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ |
216 | ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ | ||
217 | ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ | 216 | ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ |
218 | ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ | 217 | ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ |
219 | ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ | 218 | ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */ |
219 | ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ | ||
220 | ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ | ||
220 | 221 | ||
221 | ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ | 222 | ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ |
222 | ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ | 223 | ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ |
@@ -1285,26 +1286,62 @@ static inline int ata_link_active(struct ata_link *link) | |||
1285 | return ata_tag_valid(link->active_tag) || link->sactive; | 1286 | return ata_tag_valid(link->active_tag) || link->sactive; |
1286 | } | 1287 | } |
1287 | 1288 | ||
1288 | extern struct ata_link *__ata_port_next_link(struct ata_port *ap, | 1289 | /* |
1289 | struct ata_link *link, | 1290 | * Iterators |
1290 | bool dev_only); | 1291 | * |
1292 | * ATA_LITER_* constants are used to select link iteration mode and | ||
1293 | * ATA_DITER_* device iteration mode. | ||
1294 | * | ||
1295 | * For a custom iteration directly using ata_{link|dev}_next(), if | ||
1296 | * @link or @dev, respectively, is NULL, the first element is | ||
1297 | * returned. @dev and @link can be any valid device or link and the | ||
1298 | * next element according to the iteration mode will be returned. | ||
1299 | * After the last element, NULL is returned. | ||
1300 | */ | ||
1301 | enum ata_link_iter_mode { | ||
1302 | ATA_LITER_EDGE, /* if present, PMP links only; otherwise, | ||
1303 | * host link. no slave link */ | ||
1304 | ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */ | ||
1305 | ATA_LITER_PMP_FIRST, /* PMP links followed by host link, | ||
1306 | * slave link still comes after host link */ | ||
1307 | }; | ||
1291 | 1308 | ||
1292 | #define __ata_port_for_each_link(link, ap) \ | 1309 | enum ata_dev_iter_mode { |
1293 | for ((link) = __ata_port_next_link((ap), NULL, false); (link); \ | 1310 | ATA_DITER_ENABLED, |
1294 | (link) = __ata_port_next_link((ap), (link), false)) | 1311 | ATA_DITER_ENABLED_REVERSE, |
1312 | ATA_DITER_ALL, | ||
1313 | ATA_DITER_ALL_REVERSE, | ||
1314 | }; | ||
1295 | 1315 | ||
1296 | #define ata_port_for_each_link(link, ap) \ | 1316 | extern struct ata_link *ata_link_next(struct ata_link *link, |
1297 | for ((link) = __ata_port_next_link((ap), NULL, true); (link); \ | 1317 | struct ata_port *ap, |
1298 | (link) = __ata_port_next_link((ap), (link), true)) | 1318 | enum ata_link_iter_mode mode); |
1299 | 1319 | ||
1300 | #define ata_link_for_each_dev(dev, link) \ | 1320 | extern struct ata_device *ata_dev_next(struct ata_device *dev, |
1301 | for ((dev) = (link)->device; \ | 1321 | struct ata_link *link, |
1302 | (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ | 1322 | enum ata_dev_iter_mode mode); |
1303 | (dev)++) | 1323 | |
1324 | /* | ||
1325 | * Shortcut notation for iterations | ||
1326 | * | ||
1327 | * ata_for_each_link() iterates over each link of @ap according to | ||
1328 | * @mode. @link points to the current link in the loop. @link is | ||
1329 | * NULL after loop termination. ata_for_each_dev() works the same way | ||
1330 | * except that it iterates over each device of @link. | ||
1331 | * | ||
1332 | * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be | ||
1333 | * specified when using the following shorthand notations. Only the | ||
1334 | * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be | ||
1335 | * specified. This not only increases brevity but also makes it | ||
1336 | * impossible to use ATA_LITER_* for device iteration or vice-versa. | ||
1337 | */ | ||
1338 | #define ata_for_each_link(link, ap, mode) \ | ||
1339 | for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \ | ||
1340 | (link) = ata_link_next((link), (ap), ATA_LITER_##mode)) | ||
1304 | 1341 | ||
1305 | #define ata_link_for_each_dev_reverse(dev, link) \ | 1342 | #define ata_for_each_dev(dev, link, mode) \ |
1306 | for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ | 1343 | for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \ |
1307 | (dev) >= (link)->device || ((dev) = NULL); (dev)--) | 1344 | (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode)) |
1308 | 1345 | ||
1309 | /** | 1346 | /** |
1310 | * ata_ncq_enabled - Test whether NCQ is enabled | 1347 | * ata_ncq_enabled - Test whether NCQ is enabled |