src/gallium/winsys/drm/i965/gem/i965_drm_api.c

   1
   2 #include <stdio.h>
   3 #include "state_tracker/drm_api.h"
   4
   5 #include "i965_drm_winsys.h"
   6 #include "util/u_memory.h"
   7
   8 #include "i965/brw_context.h"        /* XXX: shouldn't be doing this */
   9 #include "i965/brw_screen.h"         /* XXX: shouldn't be doing this */
  10
  11 #include "trace/tr_drm.h"
  12
  13 /*
  14  * Helper functions
  15  */
  16
  17
  18 static void
  19 i965_libdrm_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    sscanf(path, "%x", device_id);
  37    fclose(file);
  38 }
  39
  40 static struct i965_libdrm_buffer *
  41 i965_libdrm_buffer_from_handle(struct i965_libdrm_winsys *idws,
  42                                const char* name, unsigned handle)
  43 {
  44    struct i965_libdrm_buffer *buf = CALLOC_STRUCT(i965_libdrm_buffer);
  45    uint32_t tile = 0, swizzle = 0;
  46
  47    if (BRW_DUMP)
  48       debug_printf("%s\n", __FUNCTION__);
  49
  50    if (!buf)
  51       return NULL;
  52    pipe_reference_init(&buf->base.reference, 1);
  53    buf->bo = drm_intel_bo_gem_create_from_name(idws->gem, name, handle);
  54    buf->base.size = buf->bo->size;
  55    buf->base.sws = &idws->base;
  56    buf->flinked = TRUE;
  57    buf->flink = handle;
  58
  59
  60    if (!buf->bo)
  61       goto err;
  62
  63    drm_intel_bo_get_tiling(buf->bo, &tile, &swizzle);
  64    if (tile != 0)
  65       buf->map_gtt = TRUE;
  66
  67    return buf;
  68
  69 err:
  70    FREE(buf);
  71    return NULL;
  72 }
  73
  74
  75 /*
  76  * Exported functions
  77  */
  78
  79
  80 static struct pipe_texture *
  81 i965_libdrm_texture_from_shared_handle(struct drm_api *api,
  82                                        struct pipe_screen *screen,
  83                                        struct pipe_texture *template,
  84                                        const char* name,
  85                                        unsigned pitch,
  86                                        unsigned handle)
  87 {
  88    /* XXX: this is silly -- there should be a way to get directly from
  89     * the "drm_api" struct to ourselves, without peering into
  90     * unrelated code:
  91     */
  92    struct i965_libdrm_winsys *idws = i965_libdrm_winsys(brw_screen(screen)->sws);
  93    struct i965_libdrm_buffer *buffer;
  94
  95    if (BRW_DUMP)
  96       debug_printf("%s\n", __FUNCTION__);
  97
  98    buffer = i965_libdrm_buffer_from_handle(idws, name, handle);
  99    if (!buffer)
 100       return NULL;
 101
 102    return brw_texture_blanket_winsys_buffer(screen, template, pitch, &buffer->base);
 103 }
 104
 105
 106 static boolean
 107 i965_libdrm_shared_handle_from_texture(struct drm_api *api,
 108                                        struct pipe_screen *screen,
 109                                        struct pipe_texture *texture,
 110                                        unsigned *pitch,
 111                                        unsigned *handle)
 112 {
 113    struct i965_libdrm_buffer *buf = NULL;
 114    struct brw_winsys_buffer *buffer = NULL;
 115
 116    if (BRW_DUMP)
 117       debug_printf("%s\n", __FUNCTION__);
 118
 119    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 120       return FALSE;
 121
 122    buf = i965_libdrm_buffer(buffer);
 123    if (!buf->flinked) {
 124       if (drm_intel_bo_flink(buf->bo, &buf->flink))
 125          return FALSE;
 126       buf->flinked = TRUE;
 127    }
 128
 129    *handle = buf->flink;
 130
 131    return TRUE;
 132 }
 133
 134 static boolean
 135 i965_libdrm_local_handle_from_texture(struct drm_api *api,
 136                                       struct pipe_screen *screen,
 137                                       struct pipe_texture *texture,
 138                                       unsigned *pitch,
 139                                       unsigned *handle)
 140 {
 141    struct brw_winsys_buffer *buffer = NULL;
 142
 143    if (BRW_DUMP)
 144       debug_printf("%s\n", __FUNCTION__);
 145
 146    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 147       return FALSE;
 148
 149    *handle = i965_libdrm_buffer(buffer)->bo->handle;
 150
 151    return TRUE;
 152 }
 153
 154 static void
 155 i965_libdrm_winsys_destroy(struct brw_winsys_screen *iws)
 156 {
 157    struct i965_libdrm_winsys *idws = i965_libdrm_winsys(iws);
 158
 159    if (BRW_DUMP)
 160       debug_printf("%s\n", __FUNCTION__);
 161
 162    drm_intel_bufmgr_destroy(idws->gem);
 163
 164    FREE(idws);
 165 }
 166
 167 static struct pipe_screen *
 168 i965_libdrm_create_screen(struct drm_api *api, int drmFD,
 169                           struct drm_create_screen_arg *arg)
 170 {
 171    struct i965_libdrm_winsys *idws;
 172    unsigned int deviceID;
 173
 174    debug_printf("%s\n", __FUNCTION__);
 175
 176    if (arg != NULL) {
 177       switch(arg->mode) {
 178       case DRM_CREATE_NORMAL:
 179          break;
 180       default:
 181          return NULL;
 182       }
 183    }
 184
 185    idws = CALLOC_STRUCT(i965_libdrm_winsys);
 186    if (!idws)
 187       return NULL;
 188
 189    i965_libdrm_get_device_id(&deviceID);
 190
 191    i965_libdrm_winsys_init_buffer_functions(idws);
 192
 193    idws->fd = drmFD;
 194    idws->id = deviceID;
 195
 196    idws->base.destroy = i965_libdrm_winsys_destroy;
 197
 198    idws->gem = drm_intel_bufmgr_gem_init(idws->fd, BRW_BATCH_SIZE);
 199    drm_intel_bufmgr_gem_enable_reuse(idws->gem);
 200
 201    idws->send_cmd = !debug_get_bool_option("BRW_NO_HW", FALSE);
 202
 203    return brw_create_screen(&idws->base, deviceID);
 204 }
 205
 206 static struct pipe_context *
 207 i965_libdrm_create_context(struct drm_api *api, struct pipe_screen *screen)
 208 {
 209    return brw_create_context(screen);
 210 }
 211
 212 static void
 213 destroy(struct drm_api *api)
 214 {
 215    if (BRW_DUMP)
 216       debug_printf("%s\n", __FUNCTION__);
 217
 218 }
 219
 220 struct drm_api i965_libdrm_api =
 221 {
 222    .create_context = i965_libdrm_create_context,
 223    .create_screen = i965_libdrm_create_screen,
 224    .texture_from_shared_handle = i965_libdrm_texture_from_shared_handle,
 225    .shared_handle_from_texture = i965_libdrm_shared_handle_from_texture,
 226    .local_handle_from_texture = i965_libdrm_local_handle_from_texture,
 227    .destroy = destroy,
 228 };
 229
 230 struct drm_api *
 231 drm_api_create()
 232 {
 233    return trace_drm_create(&i965_libdrm_api);
 234 }