diff options
Diffstat (limited to 'ANDROID_3.4.5/include/scsi/scsi_tcq.h')
| -rw-r--r-- | ANDROID_3.4.5/include/scsi/scsi_tcq.h | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/ANDROID_3.4.5/include/scsi/scsi_tcq.h b/ANDROID_3.4.5/include/scsi/scsi_tcq.h deleted file mode 100644 index 81dd12ed..00000000 --- a/ANDROID_3.4.5/include/scsi/scsi_tcq.h +++ /dev/null @@ -1,175 +0,0 @@ -#ifndef _SCSI_SCSI_TCQ_H -#define _SCSI_SCSI_TCQ_H - -#include <linux/blkdev.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_host.h> - -#define MSG_SIMPLE_TAG 0x20 -#define MSG_HEAD_TAG 0x21 -#define MSG_ORDERED_TAG 0x22 -#define MSG_ACA_TAG 0x24 /* unsupported */ - -#define SCSI_NO_TAG (-1) /* identify no tag in use */ - - -#ifdef CONFIG_BLOCK - -/** - * scsi_get_tag_type - get the type of tag the device supports - * @sdev: the scsi device - * - * Notes: - * If the drive only supports simple tags, returns MSG_SIMPLE_TAG - * if it supports all tag types, returns MSG_ORDERED_TAG. - */ -static inline int scsi_get_tag_type(struct scsi_device *sdev) -{ - if (!sdev->tagged_supported) - return 0; - if (sdev->ordered_tags) - return MSG_ORDERED_TAG; - if (sdev->simple_tags) - return MSG_SIMPLE_TAG; - return 0; -} - -static inline void scsi_set_tag_type(struct scsi_device *sdev, int tag) -{ - switch (tag) { - case MSG_ORDERED_TAG: - sdev->ordered_tags = 1; - /* fall through */ - case MSG_SIMPLE_TAG: - sdev->simple_tags = 1; - break; - case 0: - /* fall through */ - default: - sdev->ordered_tags = 0; - sdev->simple_tags = 0; - break; - } -} -/** - * scsi_activate_tcq - turn on tag command queueing - * @SDpnt: device to turn on TCQ for - * @depth: queue depth - * - * Notes: - * Eventually, I hope depth would be the maximum depth - * the device could cope with and the real queue depth - * would be adjustable from 0 to depth. - **/ -static inline void scsi_activate_tcq(struct scsi_device *sdev, int depth) -{ - if (!sdev->tagged_supported) - return; - - if (!blk_queue_tagged(sdev->request_queue)) - blk_queue_init_tags(sdev->request_queue, depth, - sdev->host->bqt); - - scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth); -} - -/** - * scsi_deactivate_tcq - turn off tag command queueing - * @SDpnt: device to turn off TCQ for - **/ -static inline void scsi_deactivate_tcq(struct scsi_device *sdev, int depth) -{ - if (blk_queue_tagged(sdev->request_queue)) - blk_queue_free_tags(sdev->request_queue); - scsi_adjust_queue_depth(sdev, 0, depth); -} - -/** - * scsi_populate_tag_msg - place a tag message in a buffer - * @SCpnt: pointer to the Scsi_Cmnd for the tag - * @msg: pointer to the area to place the tag - * - * Notes: - * designed to create the correct type of tag message for the - * particular request. Returns the size of the tag message. - * May return 0 if TCQ is disabled for this device. - **/ -static inline int scsi_populate_tag_msg(struct scsi_cmnd *cmd, char *msg) -{ - struct request *req = cmd->request; - - if (blk_rq_tagged(req)) { - *msg++ = MSG_SIMPLE_TAG; - *msg++ = req->tag; - return 2; - } - - return 0; -} - -/** - * scsi_find_tag - find a tagged command by device - * @SDpnt: pointer to the ScSI device - * @tag: the tag number - * - * Notes: - * Only works with tags allocated by the generic blk layer. - **/ -static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag) -{ - - struct request *req; - - if (tag != SCSI_NO_TAG) { - req = blk_queue_find_tag(sdev->request_queue, tag); - return req ? (struct scsi_cmnd *)req->special : NULL; - } - - /* single command, look in space */ - return sdev->current_cmnd; -} - -/** - * scsi_init_shared_tag_map - create a shared tag map - * @shost: the host to share the tag map among all devices - * @depth: the total depth of the map - */ -static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth) -{ - /* - * If the shared tag map isn't already initialized, do it now. - * This saves callers from having to check ->bqt when setting up - * devices on the shared host (for libata) - */ - if (!shost->bqt) { - shost->bqt = blk_init_tags(depth); - if (!shost->bqt) - return -ENOMEM; - } - - return 0; -} - -/** - * scsi_host_find_tag - find the tagged command by host - * @shost: pointer to scsi_host - * @tag: tag of the scsi_cmnd - * - * Notes: - * Only works with tags allocated by the generic blk layer. - **/ -static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost, - int tag) -{ - struct request *req; - - if (tag != SCSI_NO_TAG) { - req = blk_map_queue_find_tag(shost->bqt, tag); - return req ? (struct scsi_cmnd *)req->special : NULL; - } - return NULL; -} - -#endif /* CONFIG_BLOCK */ -#endif /* _SCSI_SCSI_TCQ_H */ |