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 %s pitch %d handle 0x%x\n", __FUNCTION__,
  97                    name, pitch, handle);
  98
  99    buffer = i965_libdrm_buffer_from_handle(idws, name, handle);
 100    if (!buffer)
 101       return NULL;
 102
 103    return brw_texture_blanket_winsys_buffer(screen, template, pitch, &buffer->base);
 104 }
 105
 106
 107 static boolean
 108 i965_libdrm_shared_handle_from_texture(struct drm_api *api,
 109                                        struct pipe_screen *screen,
 110                                        struct pipe_texture *texture,
 111                                        unsigned *pitch,
 112                                        unsigned *handle)
 113 {
 114    struct i965_libdrm_buffer *buf = NULL;
 115    struct brw_winsys_buffer *buffer = NULL;
 116
 117    if (BRW_DUMP)
 118       debug_printf("%s\n", __FUNCTION__);
 119
 120    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 121       return FALSE;
 122
 123    buf = i965_libdrm_buffer(buffer);
 124    if (!buf->flinked) {
 125       if (drm_intel_bo_flink(buf->bo, &buf->flink))
 126          return FALSE;
 127       buf->flinked = TRUE;
 128    }
 129
 130    *handle = buf->flink;
 131
 132    if (BRW_DUMP)
 133       debug_printf("   -> pitch %d handle 0x%x\n", *pitch, *handle);
 134
 135    return TRUE;
 136 }
 137
 138 static boolean
 139 i965_libdrm_local_handle_from_texture(struct drm_api *api,
 140                                       struct pipe_screen *screen,
 141                                       struct pipe_texture *texture,
 142                                       unsigned *pitch,
 143                                       unsigned *handle)
 144 {
 145    struct brw_winsys_buffer *buffer = NULL;
 146
 147    if (BRW_DUMP)
 148       debug_printf("%s\n", __FUNCTION__);
 149
 150    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 151       return FALSE;
 152
 153    *handle = i965_libdrm_buffer(buffer)->bo->handle;
 154
 155    if (BRW_DUMP)
 156       debug_printf("   -> pitch %d handle 0x%x\n", *pitch, *handle);
 157
 158    return TRUE;
 159 }
 160
 161 static void
 162 i965_libdrm_winsys_destroy(struct brw_winsys_screen *iws)
 163 {
 164    struct i965_libdrm_winsys *idws = i965_libdrm_winsys(iws);
 165
 166    if (BRW_DUMP)
 167       debug_printf("%s\n", __FUNCTION__);
 168
 169    drm_intel_bufmgr_destroy(idws->gem);
 170
 171    FREE(idws);
 172 }
 173
 174 static struct pipe_screen *
 175 i965_libdrm_create_screen(struct drm_api *api, int drmFD,
 176                           struct drm_create_screen_arg *arg)
 177 {
 178    struct i965_libdrm_winsys *idws;
 179    unsigned int deviceID;
 180
 181    debug_printf("%s\n", __FUNCTION__);
 182
 183    if (arg != NULL) {
 184       switch(arg->mode) {
 185       case DRM_CREATE_NORMAL:
 186          break;
 187       default:
 188          return NULL;
 189       }
 190    }
 191
 192    idws = CALLOC_STRUCT(i965_libdrm_winsys);
 193    if (!idws)
 194       return NULL;
 195
 196    i965_libdrm_get_device_id(&deviceID);
 197
 198    i965_libdrm_winsys_init_buffer_functions(idws);
 199
 200    idws->fd = drmFD;
 201    idws->id = deviceID;
 202
 203    idws->base.destroy = i965_libdrm_winsys_destroy;
 204
 205    idws->gem = drm_intel_bufmgr_gem_init(idws->fd, BRW_BATCH_SIZE);
 206    drm_intel_bufmgr_gem_enable_reuse(idws->gem);
 207
 208    idws->send_cmd = !debug_get_bool_option("BRW_NO_HW", FALSE);
 209
 210    return brw_create_screen(&idws->base, deviceID);
 211 }
 212
 213 static struct pipe_context *
 214 i965_libdrm_create_context(struct drm_api *api, struct pipe_screen *screen)
 215 {
 216    return brw_create_context(screen);
 217 }
 218
 219 static void
 220 destroy(struct drm_api *api)
 221 {
 222    if (BRW_DUMP)
 223       debug_printf("%s\n", __FUNCTION__);
 224
 225 }
 226
 227 struct drm_api i965_libdrm_api =
 228 {
 229    .create_context = i965_libdrm_create_context,
 230    .create_screen = i965_libdrm_create_screen,
 231    .texture_from_shared_handle = i965_libdrm_texture_from_shared_handle,
 232    .shared_handle_from_texture = i965_libdrm_shared_handle_from_texture,
 233    .local_handle_from_texture = i965_libdrm_local_handle_from_texture,
 234    .destroy = destroy,
 235 };
 236
 237 struct drm_api *
 238 drm_api_create()
 239 {
 240    return trace_drm_create(&i965_libdrm_api);
 241 }