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