diff options
| -rw-r--r-- | include/linux/ata.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index 6617c9f..cb79b7a 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -29,6 +29,8 @@ #ifndef __LINUX_ATA_H__ #define __LINUX_ATA_H__ +#include <linux/kernel.h> +#include <linux/string.h> #include <linux/types.h> #include <asm/byteorder.h> @@ -91,6 +93,7 @@ enum { ATA_ID_CFA_POWER = 160, ATA_ID_CFA_KEY_MGMT = 162, ATA_ID_CFA_MODES = 163, + ATA_ID_DATA_SET_MGMT = 169, ATA_ID_ROT_SPEED = 217, ATA_ID_PIO4 = (1 << 1), @@ -248,6 +251,7 @@ enum { ATA_CMD_SMART = 0xB0, ATA_CMD_MEDIA_LOCK = 0xDE, ATA_CMD_MEDIA_UNLOCK = 0xDF, + ATA_CMD_DSM = 0x06, /* marked obsolete in the ATA/ATAPI-7 spec */ ATA_CMD_RESTORE = 0x10, @@ -321,6 +325,9 @@ enum { ATA_SMART_READ_VALUES = 0xD0, ATA_SMART_READ_THRESHOLDS = 0xD1, + /* feature values for Data Set Management */ + ATA_DSM_TRIM = 0x01, + /* password used in LBA Mid / LBA High for executing SMART commands */ ATA_SMART_LBAM_PASS = 0x4F, ATA_SMART_LBAH_PASS = 0xC2, @@ -723,6 +730,14 @@ static inline int ata_id_has_unload(const u16 *id) return 0; } +static inline int ata_id_has_trim(const u16 *id) +{ + if (ata_id_major_version(id) >= 7 && + (id[ATA_ID_DATA_SET_MGMT] & 1)) + return 1; + return 0; +} + static inline int ata_id_current_chs_valid(const u16 *id) { /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command @@ -863,6 +878,32 @@ static inline void ata_id_to_hd_driveid(u16 *id) #endif } +/* + * Write up to 'max' LBA Range Entries to the buffer that will cover the + * extent from sector to sector + count. This is used for TRIM and for + * ADD LBA(S) TO NV CACHE PINNED SET. + */ +static inline unsigned ata_set_lba_range_entries(void *_buffer, unsigned max, + u64 sector, unsigned long count) +{ + __le64 *buffer = _buffer; + unsigned i = 0; + + while (i < max) { + u64 entry = sector | + ((u64)(count > 0xffff ? 0xffff : count) << 48); + buffer[i++] = __cpu_to_le64(entry); + if (count <= 0xffff) + break; + count -= 0xffff; + sector += 0xffff; + } + + max = ALIGN(i * 8, 512); + memset(buffer + i, 0, max - i * 8); + return max; +} + static inline int is_multi_taskfile(struct ata_taskfile *tf) { return (tf->command == ATA_CMD_READ_MULTI) || |