diff options
Diffstat (limited to 'qemu/hw/block/xen_blkif.h')
| -rw-r--r-- | qemu/hw/block/xen_blkif.h | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/qemu/hw/block/xen_blkif.h b/qemu/hw/block/xen_blkif.h deleted file mode 100644 index c68487cb3..000000000 --- a/qemu/hw/block/xen_blkif.h +++ /dev/null @@ -1,119 +0,0 @@ -#ifndef __XEN_BLKIF_H__ -#define __XEN_BLKIF_H__ - -#include <xen/io/ring.h> -#include <xen/io/blkif.h> -#include <xen/io/protocols.h> - -/* Not a real protocol. Used to generate ring structs which contain - * the elements common to all protocols only. This way we get a - * compiler-checkable way to use common struct elements, so we can - * avoid using switch(protocol) in a number of places. */ -struct blkif_common_request { - char dummy; -}; -struct blkif_common_response { - char dummy; -}; - -/* i386 protocol version */ -#pragma pack(push, 4) -struct blkif_x86_32_request { - uint8_t operation; /* BLKIF_OP_??? */ - uint8_t nr_segments; /* number of segments */ - blkif_vdev_t handle; /* only for read/write requests */ - uint64_t id; /* private guest value, echoed in resp */ - blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */ - struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; -}; -struct blkif_x86_32_response { - uint64_t id; /* copied from request */ - uint8_t operation; /* copied from request */ - int16_t status; /* BLKIF_RSP_??? */ -}; -typedef struct blkif_x86_32_request blkif_x86_32_request_t; -typedef struct blkif_x86_32_response blkif_x86_32_response_t; -#pragma pack(pop) - -/* x86_64 protocol version */ -struct blkif_x86_64_request { - uint8_t operation; /* BLKIF_OP_??? */ - uint8_t nr_segments; /* number of segments */ - blkif_vdev_t handle; /* only for read/write requests */ - uint64_t __attribute__((__aligned__(8))) id; - blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */ - struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; -}; -struct blkif_x86_64_response { - uint64_t __attribute__((__aligned__(8))) id; - uint8_t operation; /* copied from request */ - int16_t status; /* BLKIF_RSP_??? */ -}; -typedef struct blkif_x86_64_request blkif_x86_64_request_t; -typedef struct blkif_x86_64_response blkif_x86_64_response_t; - -DEFINE_RING_TYPES(blkif_common, struct blkif_common_request, struct blkif_common_response); -DEFINE_RING_TYPES(blkif_x86_32, struct blkif_x86_32_request, struct blkif_x86_32_response); -DEFINE_RING_TYPES(blkif_x86_64, struct blkif_x86_64_request, struct blkif_x86_64_response); - -union blkif_back_rings { - blkif_back_ring_t native; - blkif_common_back_ring_t common; - blkif_x86_32_back_ring_t x86_32_part; - blkif_x86_64_back_ring_t x86_64_part; -}; -typedef union blkif_back_rings blkif_back_rings_t; - -enum blkif_protocol { - BLKIF_PROTOCOL_NATIVE = 1, - BLKIF_PROTOCOL_X86_32 = 2, - BLKIF_PROTOCOL_X86_64 = 3, -}; - -static inline void blkif_get_x86_32_req(blkif_request_t *dst, blkif_x86_32_request_t *src) -{ - int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST; - - dst->operation = src->operation; - dst->nr_segments = src->nr_segments; - dst->handle = src->handle; - dst->id = src->id; - dst->sector_number = src->sector_number; - if (src->operation == BLKIF_OP_DISCARD) { - struct blkif_request_discard *s = (void *)src; - struct blkif_request_discard *d = (void *)dst; - d->nr_sectors = s->nr_sectors; - return; - } - /* prevent the compiler from optimizing the code and using src->nr_segments instead */ - barrier(); - if (n > dst->nr_segments) - n = dst->nr_segments; - for (i = 0; i < n; i++) - dst->seg[i] = src->seg[i]; -} - -static inline void blkif_get_x86_64_req(blkif_request_t *dst, blkif_x86_64_request_t *src) -{ - int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST; - - dst->operation = src->operation; - dst->nr_segments = src->nr_segments; - dst->handle = src->handle; - dst->id = src->id; - dst->sector_number = src->sector_number; - if (src->operation == BLKIF_OP_DISCARD) { - struct blkif_request_discard *s = (void *)src; - struct blkif_request_discard *d = (void *)dst; - d->nr_sectors = s->nr_sectors; - return; - } - /* prevent the compiler from optimizing the code and using src->nr_segments instead */ - barrier(); - if (n > dst->nr_segments) - n = dst->nr_segments; - for (i = 0; i < n; i++) - dst->seg[i] = src->seg[i]; -} - -#endif /* __XEN_BLKIF_H__ */ |