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

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