src/gallium/winsys/i915/drm/i915_drm_api.c

   1 #include <stdio.h>
   2
   3 #include "state_tracker/drm_api.h"
   4
   5 #include "i915_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 i915_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 void
  42 i915_drm_winsys_destroy(struct i915_winsys *iws)
  43 {
  44    struct i915_drm_winsys *idws = i915_drm_winsys(iws);
  45
  46    drm_intel_bufmgr_destroy(idws->pools.gem);
  47
  48    FREE(idws);
  49 }
  50
  51 static struct pipe_screen *
  52 i915_drm_create_screen(struct drm_api *api, int drmFD,
  53                        struct drm_create_screen_arg *arg)
  54 {
  55    struct i915_drm_winsys *idws;
  56    unsigned int deviceID;
  57
  58    if (arg != NULL) {
  59       switch(arg->mode) {
  60       case DRM_CREATE_NORMAL:
  61          break;
  62       default:
  63          return NULL;
  64       }
  65    }
  66
  67    idws = CALLOC_STRUCT(i915_drm_winsys);
  68    if (!idws)
  69       return NULL;
  70
  71    i915_drm_get_device_id(&deviceID);
  72
  73    i915_drm_winsys_init_batchbuffer_functions(idws);
  74    i915_drm_winsys_init_buffer_functions(idws);
  75    i915_drm_winsys_init_fence_functions(idws);
  76
  77    idws->fd = drmFD;
  78    idws->id = deviceID;
  79    idws->max_batch_size = 16 * 4096;
  80
  81    idws->base.destroy = i915_drm_winsys_destroy;
  82
  83    idws->pools.gem = drm_intel_bufmgr_gem_init(idws->fd, idws->max_batch_size);
  84    drm_intel_bufmgr_gem_enable_reuse(idws->pools.gem);
  85
  86    idws->dump_cmd = debug_get_bool_option("INTEL_DUMP_CMD", FALSE);
  87
  88    return i915_create_screen(&idws->base, deviceID);
  89 }
  90
  91 static void
  92 destroy(struct drm_api *api)
  93 {
  94
  95 }
  96
  97 struct drm_api intel_drm_api =
  98 {
  99    .name = "i915",
 100    .driver_name = "i915",
 101    .create_screen = i915_drm_create_screen,
 102    .destroy = destroy,
 103 };
 104
 105 struct drm_api *
 106 drm_api_create()
 107 {
 108    return trace_drm_create(&intel_drm_api);
 109 }