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