src/vulkan/anv_gem_stubs.c

   1 /*
   2  * Copyright © 2015 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #define _DEFAULT_SOURCE
  25
  26 #include <linux/memfd.h>
  27 #include <sys/mman.h>
  28 #include <sys/syscall.h>
  29
  30 #include "anv_private.h"
  31
  32 static inline int
  33 memfd_create(const char *name, unsigned int flags)
  34 {
  35    return syscall(SYS_memfd_create, name, flags);
  36 }
  37
  38 uint32_t
  39 anv_gem_create(struct anv_device *device, size_t size)
  40 {
  41    int fd = memfd_create("fake bo", MFD_CLOEXEC);
  42    if (fd == -1)
  43       return 0;
  44
  45    assert(fd != 0);
  46
  47    if (ftruncate(fd, size) == -1)
  48       return 0;
  49
  50    return fd;
  51 }
  52
  53 void
  54 anv_gem_close(struct anv_device *device, int gem_handle)
  55 {
  56    close(gem_handle);
  57 }
  58
  59 void*
  60 anv_gem_mmap(struct anv_device *device, uint32_t gem_handle,
  61              uint64_t offset, uint64_t size)
  62 {
  63    return mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
  64                gem_handle, offset);
  65 }
  66
  67 /* This is just a wrapper around munmap, but it also notifies valgrind that
  68  * this map is no longer valid.  Pair this with anv_gem_mmap().
  69  */
  70 void
  71 anv_gem_munmap(void *p, uint64_t size)
  72 {
  73    munmap(p, size);
  74 }
  75
  76 int
  77 anv_gem_userptr(struct anv_device *device, void *mem, size_t size)
  78 {
  79    return -1;
  80 }
  81
  82 int
  83 anv_gem_wait(struct anv_device *device, int gem_handle, int64_t *timeout_ns)
  84 {
  85    return 0;
  86 }
  87
  88 int
  89 anv_gem_execbuffer(struct anv_device *device,
  90                    struct drm_i915_gem_execbuffer2 *execbuf)
  91 {
  92    return 0;
  93 }
  94
  95 int
  96 anv_gem_set_tiling(struct anv_device *device,
  97                    int gem_handle, uint32_t stride, uint32_t tiling)
  98 {
  99    return 0;
 100 }
 101
 102 int
 103 anv_gem_get_param(int fd, uint32_t param)
 104 {
 105    unreachable("Unused");
 106 }
 107
 108 int
 109 anv_gem_create_context(struct anv_device *device)
 110 {
 111    unreachable("Unused");
 112 }
 113
 114 int
 115 anv_gem_destroy_context(struct anv_device *device, int context)
 116 {
 117    unreachable("Unused");
 118 }
 119
 120 int
 121 anv_gem_get_aperture(int fd, uint64_t *size)
 122 {
 123    unreachable("Unused");
 124 }
 125
 126 int
 127 anv_gem_handle_to_fd(struct anv_device *device, int gem_handle)
 128 {
 129    unreachable("Unused");
 130 }
 131
 132 int
 133 anv_gem_fd_to_handle(struct anv_device *device, int fd)
 134 {
 135    unreachable("Unused");
 136 }