queue.h 1.3 KB
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#ifndef MMC_QUEUE_H
#define MMC_QUEUE_H

struct request;
struct task_struct;

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struct mmc_blk_request {
	struct mmc_request	mrq;
	struct mmc_command	sbc;
	struct mmc_command	cmd;
	struct mmc_command	stop;
	struct mmc_data		data;
};

struct mmc_queue_req {
	struct request		*req;
	struct mmc_blk_request	brq;
	struct scatterlist	*sg;
	char			*bounce_buf;
	struct scatterlist	*bounce_sg;
	unsigned int		bounce_sg_len;
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	struct mmc_async_req	mmc_active;
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};

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struct mmc_queue {
	struct mmc_card		*card;
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	struct task_struct	*thread;
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	struct semaphore	thread_sem;
	unsigned int		flags;
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#define MMC_QUEUE_SUSPENDED	(1 << 0)
#define MMC_QUEUE_NEW_REQUEST	(1 << 1)

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	int			(*issue_fn)(struct mmc_queue *, struct request *);
	void			*data;
	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 *,
			  const char *);
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extern void mmc_cleanup_queue(struct mmc_queue *);
extern void mmc_queue_suspend(struct mmc_queue *);
extern void mmc_queue_resume(struct mmc_queue *);

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extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
				     struct mmc_queue_req *);
extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
extern void mmc_queue_bounce_post(struct mmc_queue_req *);
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#endif