80 lines · c
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef LINUX_MMC_IOCTL_H3#define LINUX_MMC_IOCTL_H4 5#include <linux/types.h>6#include <linux/major.h>7 8struct 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 most27 * postsleep_max_us useconds *after* issuing command. Needed for28 * some read commands for which cards have no other way of indicating29 * they're ready for the next command (i.e. there is no equivalent of30 * 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 to43 * be 8-byte aligned. Make sure this struct is the same size when44 * 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) ptr52 53/**54 * struct mmc_ioc_multi_cmd - multi command information55 * @num_of_cmds: Number of commands to send. Must be equal to or less than56 * MMC_IOC_MAX_CMDS.57 * @cmds: Array of commands with length equal to 'num_of_cmds'58 */59struct mmc_ioc_multi_cmd {60 __u64 num_of_cmds;61 struct mmc_ioc_cmd cmds[];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 by67 * the structure mmc_ioc_multi_cmd. The MMC driver will issue all68 * 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 access73 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES74 * is enforced per ioctl call. For larger data transfers, use the normal75 * block device operations.76 */77#define MMC_IOC_MAX_BYTES (512L * 1024)78#define MMC_IOC_MAX_CMDS 25579#endif /* LINUX_MMC_IOCTL_H */80