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ide: add TRIM support

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Add support for TRIM sub function of the data set management command,
and wire it up to the qemu discard infrastructure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christoph Hellwig 2011-05-19 10:58:19 +02:00 • committed by Kevin Wolf
parent 4e1e00515e
commit d353fb72f5
5 changed files with 124 additions and 5 deletions
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14
hw/ide/internal.h
View file

@ -62,7 +62,11 @@ typedef struct IDEDMAOps IDEDMAOps;
*/
#define CFA_REQ_EXT_ERROR_CODE 0x03 /* CFA Request Extended Error Code */
/*
* 0x04->0x07 Reserved
* 0x04->0x05 Reserved
*/
#define WIN_DSM 0x06
/*
* 0x07 Reserved
*/
#define WIN_SRST 0x08 /* ATAPI soft reset command */
#define WIN_DEVICE_RESET 0x08
@ -190,6 +194,9 @@ typedef struct IDEDMAOps IDEDMAOps;
#define IDE_DMA_BUF_SECTORS 256
/* feature values for Data Set Management */
#define DSM_TRIM 0x01
#if (IDE_DMA_BUF_SECTORS < MAX_MULT_SECTORS)
#error "IDE_DMA_BUF_SECTORS must be bigger or equal to MAX_MULT_SECTORS"
#endif
@ -382,6 +389,7 @@ struct unreported_events {
enum ide_dma_cmd {
IDE_DMA_READ,
IDE_DMA_WRITE,
IDE_DMA_TRIM,
};
#define ide_cmd_is_read(s) \
@ -521,6 +529,7 @@ struct IDEDeviceInfo {
#define BM_STATUS_PIO_RETRY 0x10
#define BM_STATUS_RETRY_READ 0x20
#define BM_STATUS_RETRY_FLUSH 0x40
#define BM_STATUS_RETRY_TRIM 0x80
#define BM_MIGRATION_COMPAT_STATUS_BITS \
(BM_STATUS_DMA_RETRY | BM_STATUS_PIO_RETRY | \
@ -591,6 +600,9 @@ void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
EndTransferFunc *end_transfer_func);
void ide_transfer_stop(IDEState *s);
void ide_set_inactive(IDEState *s);
BlockDriverAIOCB *ide_issue_trim(BlockDriverState *bs,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque);
/* hw/ide/atapi.c */
void ide_atapi_cmd(IDEState *s);