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
4#include <linux/types.h>
5#include <linux/blkdev.h>
6#include <linux/blk-mq.h>
7#include <linux/mmc/core.h>
8#include <linux/mmc/host.h>
9
10static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
11{
12 return blk_mq_rq_to_pdu(rq);
13}
14
15struct mmc_queue_req;
16
17static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
18{
19 return blk_mq_rq_from_pdu(mqr);
20}
21
22struct task_struct;
23struct mmc_blk_data;
24struct mmc_blk_ioc_data;
25
26struct mmc_blk_request {
27 struct mmc_request mrq;
28 struct mmc_command sbc;
29 struct mmc_command cmd;
30 struct mmc_command stop;
31 struct mmc_data data;
32 int retune_retry_done;
33};
34
35/**
36 * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
37 * @MMC_DRV_OP_IOCTL: ioctl operation
38 * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
39 */
40enum mmc_drv_op {
41 MMC_DRV_OP_IOCTL,
42 MMC_DRV_OP_BOOT_WP,
43};
44
45struct mmc_queue_req {
46 struct mmc_blk_request brq;
47 struct scatterlist *sg;
48 char *bounce_buf;
49 struct scatterlist *bounce_sg;
50 unsigned int bounce_sg_len;
51 struct mmc_async_req areq;
52 enum mmc_drv_op drv_op;
53 int drv_op_result;
54 struct mmc_blk_ioc_data **idata;
55 unsigned int ioc_count;
56};
57
58struct mmc_queue {
59 struct mmc_card *card;
60 struct task_struct *thread;
61 struct semaphore thread_sem;
62 bool suspended;
63 bool asleep;
64 struct mmc_blk_data *blkdata;
65 struct request_queue *queue;
66 /*
67 * FIXME: this counter is not a very reliable way of keeping
68 * track of how many requests that are ongoing. Switch to just
69 * letting the block core keep track of requests and per-request
70 * associated mmc_queue_req data.
71 */
72 int qcnt;
73};
74
75extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
76 const char *);
77extern void mmc_cleanup_queue(struct mmc_queue *);
78extern void mmc_queue_suspend(struct mmc_queue *);
79extern void mmc_queue_resume(struct mmc_queue *);
80
81extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
82 struct mmc_queue_req *);
83extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
84extern void mmc_queue_bounce_post(struct mmc_queue_req *);
85
86extern int mmc_access_rpmb(struct mmc_queue *);
87
88#endif