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