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