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 #include <linux/major.h>
7
8 struct mmc_ioc_cmd {
9 /*
10 * Direction of data: nonzero = write, zero = read.
11 * Bit 31 selects 'Reliable Write' for RPMB.
12 */
13 int write_flag;
14
15 /* Application-specific command. true = precede with CMD55 */
16 int is_acmd;
17
18 __u32 opcode;
19 __u32 arg;
20 __u32 response[4]; /* CMD response */
21 unsigned int flags;
22 unsigned int blksz;
23 unsigned int blocks;
24
25 /*
26 * Sleep at least postsleep_min_us useconds, and at most
27 * postsleep_max_us useconds *after* issuing command. Needed for
28 * some read commands for which cards have no other way of indicating
29 * they're ready for the next command (i.e. there is no equivalent of
30 * a "busy" indicator for read operations).
31 */
32 unsigned int postsleep_min_us;
33 unsigned int postsleep_max_us;
34
35 /*
36 * Override driver-computed timeouts. Note the difference in units!
37 */
38 unsigned int data_timeout_ns;
39 unsigned int cmd_timeout_ms;
40
41 /*
42 * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to
43 * be 8-byte aligned. Make sure this struct is the same size when
44 * built for 32-bit.
45 */
46 __u32 __pad;
47
48 /* DAT buffer */
49 __u64 data_ptr;
50 };
51 #define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
52
53 /**
54 * struct mmc_ioc_multi_cmd - multi command information
55 * @num_of_cmds: Number of commands to send. Must be equal to or less than
56 * MMC_IOC_MAX_CMDS.
57 * @cmds: Array of commands with length equal to 'num_of_cmds'
58 */
59 struct mmc_ioc_multi_cmd {
60 __u64 num_of_cmds;
61 struct mmc_ioc_cmd cmds[0];
62 };
63
64 #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
65 /*
66 * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by
67 * the structure mmc_ioc_multi_cmd. The MMC driver will issue all
68 * commands in array in sequence to card.
69 */
70 #define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)
71 /*
72 * Since this ioctl is only meant to enhance (and not replace) normal access
73 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
74 * is enforced per ioctl call. For larger data transfers, use the normal
75 * block device operations.
76 */
77 #define MMC_IOC_MAX_BYTES (512L * 1024)
78 #define MMC_IOC_MAX_CMDS 255
79 #endif /* LINUX_MMC_IOCTL_H */