ioctl.h (2354B) - Raw
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[]; 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 */