| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 { |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 8 | /* |
| 9 | * Direction of data: nonzero = write, zero = read. |
| 10 | * Bit 31 selects 'Reliable Write' for RPMB. |
| 11 | */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |