src/gallium/winsys/drm/intel/gem/intel_drm_api.c

   1
   2 #include "state_tracker/drm_api.h"
   3
   4 #include "intel_drm_winsys.h"
   5 #include "util/u_memory.h"
   6
   7 #include "i915/i915_context.h"
   8 #include "i915/i915_screen.h"
   9
  10 #include "trace/tr_drm.h"
  11
  12 /*
  13  * Helper functions
  14  */
  15
  16
  17 static void
  18 intel_drm_get_device_id(unsigned int *device_id)
  19 {
  20    char path[512];
  21    FILE *file;
  22    void *shutup_gcc;
  23
  24    /*
  25     * FIXME: Fix this up to use a drm ioctl or whatever.
  26     */
  27
  28    snprintf(path, sizeof(path), "/sys/class/drm/card0/device/device");
  29    file = fopen(path, "r");
  30    if (!file) {
  31       return;
  32    }
  33
  34    shutup_gcc = fgets(path, sizeof(path), file);
  35    (void) shutup_gcc;
  36    sscanf(path, "%x", device_id);
  37    fclose(file);
  38 }
  39
  40 static struct intel_buffer *
  41 intel_drm_buffer_from_handle(struct intel_drm_winsys *idws,
  42                              const char* name, unsigned handle)
  43 {
  44    struct intel_drm_buffer *buf = CALLOC_STRUCT(intel_drm_buffer);
  45    uint32_t tile = 0, swizzle = 0;
  46
  47    if (!buf)
  48       return NULL;
  49
  50    buf->magic = 0xDEAD1337;
  51    buf->bo = drm_intel_bo_gem_create_from_name(idws->pools.gem, name, handle);
  52    buf->flinked = TRUE;
  53    buf->flink = handle;
  54
  55    if (!buf->bo)
  56       goto err;
  57
  58    drm_intel_bo_get_tiling(buf->bo, &tile, &swizzle);
  59    if (tile != INTEL_TILE_NONE)
  60       buf->map_gtt = TRUE;
  61
  62    return (struct intel_buffer *)buf;
  63
  64 err:
  65    FREE(buf);
  66    return NULL;
  67 }
  68
  69
  70 /*
  71  * Exported functions
  72  */
  73
  74
  75 static struct pipe_texture *
  76 intel_drm_texture_from_shared_handle(struct drm_api *api,
  77                                      struct pipe_screen *screen,
  78                                      struct pipe_texture *templ,
  79                                      const char* name,
  80                                      unsigned pitch,
  81                                      unsigned handle)
  82 {
  83    struct intel_drm_winsys *idws = intel_drm_winsys(i915_screen(screen)->iws);
  84    struct intel_buffer *buffer;
  85
  86    buffer = intel_drm_buffer_from_handle(idws, name, handle);
  87    if (!buffer)
  88       return NULL;
  89
  90    return i915_texture_blanket_intel(screen, templ, pitch, buffer);
  91 }
  92
  93 static boolean
  94 intel_drm_shared_handle_from_texture(struct drm_api *api,
  95                                      struct pipe_screen *screen,
  96                                      struct pipe_texture *texture,
  97                                      unsigned *pitch,
  98                                      unsigned *handle)
  99 {
 100    struct intel_drm_buffer *buf = NULL;
 101    struct intel_buffer *buffer = NULL;
 102    if (!i915_get_texture_buffer_intel(texture, &buffer, pitch))
 103       return FALSE;
 104
 105    buf = intel_drm_buffer(buffer);
 106    if (!buf->flinked) {
 107       if (drm_intel_bo_flink(buf->bo, &buf->flink))
 108          return FALSE;
 109       buf->flinked = TRUE;
 110    }
 111
 112    *handle = buf->flink;
 113
 114    return TRUE;
 115 }
 116
 117 static boolean
 118 intel_drm_local_handle_from_texture(struct drm_api *api,
 119                                     struct pipe_screen *screen,
 120                                     struct pipe_texture *texture,
 121                                     unsigned *pitch,
 122                                     unsigned *handle)
 123 {
 124    struct intel_buffer *buffer = NULL;
 125    if (!i915_get_texture_buffer_intel(texture, &buffer, pitch))
 126       return FALSE;
 127
 128    *handle = intel_drm_buffer(buffer)->bo->handle;
 129
 130    return TRUE;
 131 }
 132
 133 static void
 134 intel_drm_winsys_destroy(struct intel_winsys *iws)
 135 {
 136    struct intel_drm_winsys *idws = intel_drm_winsys(iws);
 137
 138    drm_intel_bufmgr_destroy(idws->pools.gem);
 139
 140    FREE(idws);
 141 }
 142
 143 static struct pipe_screen *
 144 intel_drm_create_screen(struct drm_api *api, int drmFD,
 145                         struct drm_create_screen_arg *arg)
 146 {
 147    struct intel_drm_winsys *idws;
 148    unsigned int deviceID;
 149
 150    if (arg != NULL) {
 151       switch(arg->mode) {
 152       case DRM_CREATE_NORMAL:
 153          break;
 154       default:
 155          return NULL;
 156       }
 157    }
 158
 159    idws = CALLOC_STRUCT(intel_drm_winsys);
 160    if (!idws)
 161       return NULL;
 162
 163    intel_drm_get_device_id(&deviceID);
 164
 165    intel_drm_winsys_init_batchbuffer_functions(idws);
 166    intel_drm_winsys_init_buffer_functions(idws);
 167    intel_drm_winsys_init_fence_functions(idws);
 168
 169    idws->fd = drmFD;
 170    idws->id = deviceID;
 171    idws->max_batch_size = 16 * 4096;
 172
 173    idws->base.destroy = intel_drm_winsys_destroy;
 174
 175    idws->pools.gem = drm_intel_bufmgr_gem_init(idws->fd, idws->max_batch_size);
 176    drm_intel_bufmgr_gem_enable_reuse(idws->pools.gem);
 177
 178    idws->softpipe = FALSE;
 179    idws->dump_cmd = debug_get_bool_option("INTEL_DUMP_CMD", FALSE);
 180
 181    return i915_create_screen(&idws->base, deviceID);
 182 }
 183
 184 static struct pipe_context *
 185 intel_drm_create_context(struct drm_api *api, struct pipe_screen *screen)
 186 {
 187    return i915_create_context(screen);
 188 }
 189
 190 static void
 191 destroy(struct drm_api *api)
 192 {
 193
 194 }
 195
 196 struct drm_api intel_drm_api =
 197 {
 198    .name = "i915",
 199    .driver_name = "i915",
 200    .create_context = intel_drm_create_context,
 201    .create_screen = intel_drm_create_screen,
 202    .texture_from_shared_handle = intel_drm_texture_from_shared_handle,
 203    .shared_handle_from_texture = intel_drm_shared_handle_from_texture,
 204    .local_handle_from_texture = intel_drm_local_handle_from_texture,
 205    .destroy = destroy,
 206 };
 207
 208 struct drm_api *
 209 drm_api_create()
 210 {
 211    return trace_drm_create(&intel_drm_api);
 212 }