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 
7 struct 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  */
55 struct 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 */
76