1#ifndef MMC_QUEUE_H
 2#define MMC_QUEUE_H
 3
 4#define MMC_REQ_SPECIAL_MASK	(REQ_DISCARD | REQ_FLUSH)
 5
 6struct request;
 7struct task_struct;
 8
 9struct mmc_blk_request {
10	struct mmc_request	mrq;
11	struct mmc_command	sbc;
12	struct mmc_command	cmd;
13	struct mmc_command	stop;
14	struct mmc_data		data;
15};
16
17enum mmc_packed_type {
18	MMC_PACKED_NONE = 0,
19	MMC_PACKED_WRITE,
20};
21
22#define mmc_packed_cmd(type)	((type) != MMC_PACKED_NONE)
23#define mmc_packed_wr(type)	((type) == MMC_PACKED_WRITE)
24
25struct mmc_packed {
26	struct list_head	list;
27	u32			cmd_hdr[1024];
28	unsigned int		blocks;
29	u8			nr_entries;
30	u8			retries;
31	s16			idx_failure;
32};
33
34struct mmc_queue_req {
35	struct request		*req;
36	struct mmc_blk_request	brq;
37	struct scatterlist	*sg;
38	char			*bounce_buf;
39	struct scatterlist	*bounce_sg;
40	unsigned int		bounce_sg_len;
41	struct mmc_async_req	mmc_active;
42	enum mmc_packed_type	cmd_type;
43	struct mmc_packed	*packed;
44};
45
46struct mmc_queue {
47	struct mmc_card		*card;
48	struct task_struct	*thread;
49	struct semaphore	thread_sem;
50	unsigned int		flags;
51#define MMC_QUEUE_SUSPENDED	(1 << 0)
52#define MMC_QUEUE_NEW_REQUEST	(1 << 1)
53
54	int			(*issue_fn)(struct mmc_queue *, struct request *);
55	void			*data;
56	struct request_queue	*queue;
57	struct mmc_queue_req	mqrq[2];
58	struct mmc_queue_req	*mqrq_cur;
59	struct mmc_queue_req	*mqrq_prev;
60};
61
62extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
63			  const char *);
64extern void mmc_cleanup_queue(struct mmc_queue *);
65extern void mmc_queue_suspend(struct mmc_queue *);
66extern void mmc_queue_resume(struct mmc_queue *);
67
68extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
69				     struct mmc_queue_req *);
70extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
71extern void mmc_queue_bounce_post(struct mmc_queue_req *);
72
73extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
74extern void mmc_packed_clean(struct mmc_queue *);
75
76#endif