*/
#define BLKIF_MAX_SEGMENTS_PER_REQUEST 11
+/*
+ * NB. first_sect and last_sect in blkif_request_segment, as well as
+ * sector_number in blkif_request, are always expressed in 512-byte units.
+ * However they must be properly aligned to the real sector size of the
+ * physical disk, which is reported in the "sector-size" node in the backend
+ * xenbus info. Also the xenbus "sectors" node is expressed in 512-byte units.
+ */
struct blkif_request_segment {
grant_ref_t gref; /* reference to I/O buffer frame */
/* @first_sect: first sector in frame to transfer (inclusive). */
--- /dev/null
+/******************************************************************************
+ * tmem.h
+ *
+ * Guest OS interface to Xen Transcendent Memory.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Copyright (c) 2004, K A Fraser
+ */
+
+#ifndef __XEN_PUBLIC_TMEM_H__
+#define __XEN_PUBLIC_TMEM_H__
+
+#include "xen.h"
+
+/* Commands to HYPERVISOR_tmem_op() */
+#define TMEM_CONTROL 0
+#define TMEM_NEW_POOL 1
+#define TMEM_DESTROY_POOL 2
+#define TMEM_NEW_PAGE 3
+#define TMEM_PUT_PAGE 4
+#define TMEM_GET_PAGE 5
+#define TMEM_FLUSH_PAGE 6
+#define TMEM_FLUSH_OBJECT 7
+#define TMEM_READ 8
+#define TMEM_WRITE 9
+#define TMEM_XCHG 10
+
+/* Subops for HYPERVISOR_tmem_op(TMEM_CONTROL) */
+#define TMEMC_THAW 0
+#define TMEMC_FREEZE 1
+#define TMEMC_FLUSH 2
+#define TMEMC_DESTROY 3
+#define TMEMC_LIST 4
+#define TMEMC_SET_WEIGHT 5
+#define TMEMC_SET_CAP 6
+#define TMEMC_SET_COMPRESS 7
+
+/* Bits for HYPERVISOR_tmem_op(TMEM_NEW_POOL) */
+#define TMEM_POOL_PERSIST 1
+#define TMEM_POOL_SHARED 2
+#define TMEM_POOL_PAGESIZE_SHIFT 4
+#define TMEM_POOL_PAGESIZE_MASK 0xf
+#define TMEM_POOL_VERSION_SHIFT 24
+#define TMEM_POOL_VERSION_MASK 0xff
+
+/* Special errno values */
+#define EFROZEN 1000
+#define EEMPTY 1001
+
+
+#ifndef __ASSEMBLY__
+typedef xen_pfn_t tmem_cli_mfn_t;
+typedef XEN_GUEST_HANDLE(char) tmem_cli_va_t;
+struct tmem_op {
+ uint32_t cmd;
+ int32_t pool_id; /* private > 0; shared < 0; 0 is invalid */
+ union {
+ struct { /* for cmd == TMEM_NEW_POOL */
+ uint64_t uuid[2];
+ uint32_t flags;
+ } new;
+ struct { /* for cmd == TMEM_CONTROL */
+ uint32_t subop;
+ uint32_t cli_id;
+ uint32_t arg1;
+ uint32_t arg2;
+ tmem_cli_va_t buf;
+ } ctrl;
+ struct {
+ uint64_t object;
+ uint32_t index;
+ uint32_t tmem_offset;
+ uint32_t pfn_offset;
+ uint32_t len;
+ tmem_cli_mfn_t cmfn; /* client machine page frame */
+ } gen;
+ } u;
+};
+typedef struct tmem_op tmem_op_t;
+DEFINE_XEN_GUEST_HANDLE(tmem_op_t);
+
+#endif
+
+#endif /* __XEN_PUBLIC_TMEM_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
projects / legacy / linux-2.6.18-xen.git / commitdiff