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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef LINUX_MMC_IOCTL_H
3#define LINUX_MMC_IOCTL_H
4
5#include <linux/types.h>
6
7struct mmc_ioc_cmd {
8 /* Implies direction of data. true = write, false = read */
9 int write_flag;
10
11 /* Application-specific command. true = precede with CMD55 */
12 int is_acmd;
13
14 __u32 opcode;
15 __u32 arg;
16 __u32 response[4]; /* CMD response */
17 unsigned int flags;
18 unsigned int blksz;
19 unsigned int blocks;
20
21 /*
22 * Sleep at least postsleep_min_us useconds, and at most
23 * postsleep_max_us useconds *after* issuing command. Needed for
24 * some read commands for which cards have no other way of indicating
25 * they're ready for the next command (i.e. there is no equivalent of
26 * a "busy" indicator for read operations).
27 */
28 unsigned int postsleep_min_us;
29 unsigned int postsleep_max_us;
30
31 /*
32 * Override driver-computed timeouts. Note the difference in units!
33 */
34 unsigned int data_timeout_ns;
35 unsigned int cmd_timeout_ms;
36
37 /*
38 * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to
39 * be 8-byte aligned. Make sure this struct is the same size when
40 * built for 32-bit.
41 */
42 __u32 __pad;
43
44 /* DAT buffer */
45 __u64 data_ptr;
46};
47#define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
48
49/**
50 * struct mmc_ioc_multi_cmd - multi command information
51 * @num_of_cmds: Number of commands to send. Must be equal to or less than
52 * MMC_IOC_MAX_CMDS.
53 * @cmds: Array of commands with length equal to 'num_of_cmds'
54 */
55struct mmc_ioc_multi_cmd {
56 __u64 num_of_cmds;
57 struct mmc_ioc_cmd cmds[0];
58};
59
60#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
61/*
62 * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by
63 * the structure mmc_ioc_multi_cmd. The MMC driver will issue all
64 * commands in array in sequence to card.
65 */
66#define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)
67/*
68 * Since this ioctl is only meant to enhance (and not replace) normal access
69 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
70 * is enforced per ioctl call. For larger data transfers, use the normal
71 * block device operations.
72 */
73#define MMC_IOC_MAX_BYTES (512L * 1024)
74#define MMC_IOC_MAX_CMDS 255
75#endif /* LINUX_MMC_IOCTL_H */