Squash commits for public release

kernel/include/drivers/storage/virtio_block.h

@@ -0,0 +1,58 @@
+#ifndef _KERNEL_DRIVERS_STORAGE_VIRTIO_BLOCK_H
+#define _KERNEL_DRIVERS_STORAGE_VIRTIO_BLOCK_H
+
+#include <drivers/driver_manager.h>
+#include <drivers/virtio/virtio.h>
+#include <libkern/types.h>
+#include <mem/kmalloc.h>
+
+#define VIRTIO_BLK_T_IN (0)
+#define VIRTIO_BLK_T_OUT (1)
+#define VIRTIO_BLK_T_FLUSH (4)
+#define VIRTIO_BLK_T_DISCARD (11)
+#define VIRTIO_BLK_T_WRITE_ZEROES (13)
+
+// Status values
+#define VIRTIO_BLK_S_OK (0)
+#define VIRTIO_BLK_S_IOERR (1)
+#define VIRTIO_BLK_S_UNSUPP (2)
+
+// Feature bits
+#define VIRTIO_BLK_F_SIZE_MAX (1)
+#define VIRTIO_BLK_F_SEG_MAX (2)
+#define VIRTIO_BLK_F_GEOMETRY (4)
+#define VIRTIO_BLK_F_RO (5)
+#define VIRTIO_BLK_F_BLK_SIZE (6)
+#define VIRTIO_BLK_F_FLUSH (9)
+#define VIRTIO_BLK_F_TOPOLOGY (10)
+#define VIRTIO_BLK_F_CONFIG_WCE (11)
+#define VIRTIO_BLK_F_DISCARD (13)
+#define VIRTIO_BLK_F_WRITE_ZEROES (14)
+
+struct block_dev {
+    virtio_queue_desc_t queue_desc;
+    void* ptr;
+    uint32_t idx;
+    uint32_t ack_used_idx;
+    virtio_buffer_desc_t buffer_desc;
+};
+typedef struct block_dev block_dev_t;
+
+typedef struct {
+    uint32_t blktype;
+    uint32_t reserved;
+    uint64_t sector;
+} block_header_t;
+
+typedef struct {
+    uint8_t status;
+} block_status_t;
+
+typedef struct {
+    block_header_t header;
+    block_status_t status;
+    uint16_t head;
+    uint16_t watcher;
+} block_request_t;
+
+#endif //_KERNEL_DRIVERS_STORAGE_VIRTIO_BLOCK_H