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3a5e02ced1
This adds a REQ_OP_FLUSH operation that is sent to request_fn based drivers by the block layer's flush code, instead of sending requests with the request->cmd_flags REQ_FLUSH bit set. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
#ifndef MMC_QUEUE_H
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#define MMC_QUEUE_H
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static inline bool mmc_req_is_special(struct request *req)
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{
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return req &&
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(req_op(req) == REQ_OP_FLUSH || req_op(req) == REQ_OP_DISCARD);
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}
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struct request;
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struct task_struct;
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struct mmc_blk_request {
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struct mmc_request mrq;
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struct mmc_command sbc;
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struct mmc_command cmd;
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struct mmc_command stop;
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struct mmc_data data;
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int retune_retry_done;
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};
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enum mmc_packed_type {
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MMC_PACKED_NONE = 0,
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MMC_PACKED_WRITE,
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};
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#define mmc_packed_cmd(type) ((type) != MMC_PACKED_NONE)
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#define mmc_packed_wr(type) ((type) == MMC_PACKED_WRITE)
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struct mmc_packed {
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struct list_head list;
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u32 cmd_hdr[1024];
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unsigned int blocks;
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u8 nr_entries;
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u8 retries;
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s16 idx_failure;
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};
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struct mmc_queue_req {
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struct request *req;
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struct mmc_blk_request brq;
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struct scatterlist *sg;
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char *bounce_buf;
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struct scatterlist *bounce_sg;
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unsigned int bounce_sg_len;
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struct mmc_async_req mmc_active;
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enum mmc_packed_type cmd_type;
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struct mmc_packed *packed;
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};
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struct mmc_queue {
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struct mmc_card *card;
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struct task_struct *thread;
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struct semaphore thread_sem;
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unsigned int flags;
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#define MMC_QUEUE_SUSPENDED (1 << 0)
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#define MMC_QUEUE_NEW_REQUEST (1 << 1)
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int (*issue_fn)(struct mmc_queue *, struct request *);
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void *data;
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struct request_queue *queue;
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struct mmc_queue_req mqrq[2];
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struct mmc_queue_req *mqrq_cur;
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struct mmc_queue_req *mqrq_prev;
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};
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extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
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const char *);
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extern void mmc_cleanup_queue(struct mmc_queue *);
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extern void mmc_queue_suspend(struct mmc_queue *);
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extern void mmc_queue_resume(struct mmc_queue *);
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extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
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struct mmc_queue_req *);
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extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
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extern void mmc_queue_bounce_post(struct mmc_queue_req *);
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extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
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extern void mmc_packed_clean(struct mmc_queue *);
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extern int mmc_access_rpmb(struct mmc_queue *);
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#endif
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