1 #ifndef _GPXE_BLOCKDEV_H 2 #define _GPXE_BLOCKDEV_H 3 4 /** 5 * @file 6 * 7 * Block devices 8 * 9 */ 10 11 FILE_LICENCE ( GPL2_OR_LATER ); 12 13 #include <gpxe/uaccess.h> 14 15 struct block_device; 16 17 /** Block device operations */ 18 struct block_device_operations { 19 /** 20 * Read block 21 * 22 * @v blockdev Block device 23 * @v block Block number 24 * @v count Block count 25 * @v buffer Data buffer 26 * @ret rc Return status code 27 */ 28 int ( * read ) ( struct block_device *blockdev, uint64_t block, 29 unsigned long count, userptr_t buffer ); 30 /** 31 * Write block 32 * 33 * @v blockdev Block device 34 * @v block Block number 35 * @v count Block count 36 * @v buffer Data buffer 37 * @ret rc Return status code 38 */ 39 int ( * write ) ( struct block_device *blockdev, uint64_t block, 40 unsigned long count, userptr_t buffer ); 41 }; 42 43 /** A block device */ 44 struct block_device { 45 /** Block device operations */ 46 struct block_device_operations *op; 47 /** Block size */ 48 size_t blksize; 49 /** Total number of blocks */ 50 uint64_t blocks; 51 }; 52 53 #endif /* _GPXE_BLOCKDEV_H */ 54
