i915_drm_buffer.c revision c62f5c7e7bc3ed84677805b3800fbcfa93c419ea 
1
2#include "state_tracker/drm_driver.h"
3#include "i915_drm_winsys.h"
4#include "util/u_memory.h"
5
6#include "i915_drm.h"
7
8static struct i915_winsys_buffer *
9i915_drm_buffer_create(struct i915_winsys *iws,
10                        unsigned size,
11                        enum i915_winsys_buffer_type type)
12{
13   struct i915_drm_buffer *buf = CALLOC_STRUCT(i915_drm_buffer);
14   struct i915_drm_winsys *idws = i915_drm_winsys(iws);
15   char *name;
16
17   if (!buf)
18      return NULL;
19
20   buf->magic = 0xDEAD1337;
21   buf->flinked = FALSE;
22   buf->flink = 0;
23
24   if (type == I915_NEW_TEXTURE) {
25      name = "gallium3d_texture";
26   } else if (type == I915_NEW_VERTEX) {
27      name = "gallium3d_vertex";
28   } else if (type == I915_NEW_SCANOUT) {
29      name = "gallium3d_scanout";
30   } else {
31      assert(0);
32      name = "gallium3d_unknown";
33   }
34
35   buf->bo = drm_intel_bo_alloc(idws->gem_manager, name, size, 0);
36
37   if (!buf->bo)
38      goto err;
39
40   return (struct i915_winsys_buffer *)buf;
41
42err:
43   assert(0);
44   FREE(buf);
45   return NULL;
46}
47
48static struct i915_winsys_buffer *
49i915_drm_buffer_from_handle(struct i915_winsys *iws,
50                             struct winsys_handle *whandle,
51                             unsigned *stride)
52{
53   struct i915_drm_winsys *idws = i915_drm_winsys(iws);
54   struct i915_drm_buffer *buf = CALLOC_STRUCT(i915_drm_buffer);
55   uint32_t tile = 0, swizzle = 0;
56
57   if (!buf)
58      return NULL;
59
60   buf->magic = 0xDEAD1337;
61   buf->bo = drm_intel_bo_gem_create_from_name(idws->gem_manager, "gallium3d_from_handle", whandle->handle);
62   buf->flinked = TRUE;
63   buf->flink = whandle->handle;
64
65   if (!buf->bo)
66      goto err;
67
68   drm_intel_bo_get_tiling(buf->bo, &tile, &swizzle);
69
70   *stride = whandle->stride;
71
72   return (struct i915_winsys_buffer *)buf;
73
74err:
75   FREE(buf);
76   return NULL;
77}
78
79static boolean
80i915_drm_buffer_get_handle(struct i915_winsys *iws,
81                            struct i915_winsys_buffer *buffer,
82                            struct winsys_handle *whandle,
83                            unsigned stride)
84{
85   struct i915_drm_buffer *buf = i915_drm_buffer(buffer);
86
87   if (whandle->type == DRM_API_HANDLE_TYPE_SHARED) {
88      if (!buf->flinked) {
89         if (drm_intel_bo_flink(buf->bo, &buf->flink))
90            return FALSE;
91         buf->flinked = TRUE;
92      }
93
94      whandle->handle = buf->flink;
95   } else if (whandle->type == DRM_API_HANDLE_TYPE_KMS) {
96      whandle->handle = buf->bo->handle;
97   } else {
98      assert(!"unknown usage");
99      return FALSE;
100   }
101
102   whandle->stride = stride;
103   return TRUE;
104}
105
106static int
107i915_drm_buffer_set_fence_reg(struct i915_winsys *iws,
108                               struct i915_winsys_buffer *buffer,
109                               unsigned stride,
110                               enum i915_winsys_buffer_tile tile)
111{
112   struct i915_drm_buffer *buf = i915_drm_buffer(buffer);
113   assert(I915_TILING_NONE == I915_TILE_NONE);
114   assert(I915_TILING_X == I915_TILE_X);
115   assert(I915_TILING_Y == I915_TILE_Y);
116
117   if (tile != I915_TILE_NONE) {
118      assert(buf->map_count == 0);
119   }
120
121   return drm_intel_bo_set_tiling(buf->bo, &tile, stride);
122}
123
124static void *
125i915_drm_buffer_map(struct i915_winsys *iws,
126                     struct i915_winsys_buffer *buffer,
127                     boolean write)
128{
129   struct i915_drm_buffer *buf = i915_drm_buffer(buffer);
130   drm_intel_bo *bo = intel_bo(buffer);
131   int ret = 0;
132
133   assert(bo);
134
135   if (buf->map_count)
136      goto out;
137
138   ret = drm_intel_gem_bo_map_gtt(bo);
139
140   buf->ptr = bo->virtual;
141
142   assert(ret == 0);
143out:
144   if (ret)
145      return NULL;
146
147   buf->map_count++;
148   return buf->ptr;
149}
150
151static void
152i915_drm_buffer_unmap(struct i915_winsys *iws,
153                       struct i915_winsys_buffer *buffer)
154{
155   struct i915_drm_buffer *buf = i915_drm_buffer(buffer);
156
157   if (--buf->map_count)
158      return;
159
160   drm_intel_gem_bo_unmap_gtt(intel_bo(buffer));
161}
162
163static int
164i915_drm_buffer_write(struct i915_winsys *iws,
165                       struct i915_winsys_buffer *buffer,
166                       size_t offset,
167                       size_t size,
168                       const void *data)
169{
170   struct i915_drm_buffer *buf = i915_drm_buffer(buffer);
171
172   return drm_intel_bo_subdata(buf->bo, offset, size, (void*)data);
173}
174
175static void
176i915_drm_buffer_destroy(struct i915_winsys *iws,
177                         struct i915_winsys_buffer *buffer)
178{
179   drm_intel_bo_unreference(intel_bo(buffer));
180
181#ifdef DEBUG
182   i915_drm_buffer(buffer)->magic = 0;
183   i915_drm_buffer(buffer)->bo = NULL;
184#endif
185
186   FREE(buffer);
187}
188
189void
190i915_drm_winsys_init_buffer_functions(struct i915_drm_winsys *idws)
191{
192   idws->base.buffer_create = i915_drm_buffer_create;
193   idws->base.buffer_from_handle = i915_drm_buffer_from_handle;
194   idws->base.buffer_get_handle = i915_drm_buffer_get_handle;
195   idws->base.buffer_set_fence_reg = i915_drm_buffer_set_fence_reg;
196   idws->base.buffer_map = i915_drm_buffer_map;
197   idws->base.buffer_unmap = i915_drm_buffer_unmap;
198   idws->base.buffer_write = i915_drm_buffer_write;
199   idws->base.buffer_destroy = i915_drm_buffer_destroy;
200}
201