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 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, &buf->tiling, &swizzle);
  64    if (buf->tiling != 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,
 104                                             buffer->tiling,
 105                                             &buffer->base);
 106 }
 107
 108
 109 static boolean
 110 i965_libdrm_shared_handle_from_texture(struct drm_api *api,
 111                                        struct pipe_screen *screen,
 112                                        struct pipe_texture *texture,
 113                                        unsigned *pitch,
 114                                        unsigned *handle)
 115 {
 116    struct i965_libdrm_buffer *buf = NULL;
 117    struct brw_winsys_buffer *buffer = NULL;
 118
 119    if (BRW_DUMP)
 120       debug_printf("%s\n", __FUNCTION__);
 121
 122    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 123       return FALSE;
 124
 125    buf = i965_libdrm_buffer(buffer);
 126    if (!buf->flinked) {
 127       if (drm_intel_bo_flink(buf->bo, &buf->flink))
 128          return FALSE;
 129       buf->flinked = TRUE;
 130    }
 131
 132    *handle = buf->flink;
 133
 134    if (BRW_DUMP)
 135       debug_printf("   -> pitch %d handle 0x%x\n", *pitch, *handle);
 136
 137    return TRUE;
 138 }
 139
 140 static boolean
 141 i965_libdrm_local_handle_from_texture(struct drm_api *api,
 142                                       struct pipe_screen *screen,
 143                                       struct pipe_texture *texture,
 144                                       unsigned *pitch,
 145                                       unsigned *handle)
 146 {
 147    struct brw_winsys_buffer *buffer = NULL;
 148
 149    if (BRW_DUMP)
 150       debug_printf("%s\n", __FUNCTION__);
 151
 152    if (!brw_texture_get_winsys_buffer(texture, &buffer, pitch))
 153       return FALSE;
 154
 155    *handle = i965_libdrm_buffer(buffer)->bo->handle;
 156
 157    if (BRW_DUMP)
 158       debug_printf("   -> pitch %d handle 0x%x\n", *pitch, *handle);
 159
 160    return TRUE;
 161 }
 162
 163 static void
 164 i965_libdrm_winsys_destroy(struct brw_winsys_screen *iws)
 165 {
 166    struct i965_libdrm_winsys *idws = i965_libdrm_winsys(iws);
 167
 168    if (BRW_DUMP)
 169       debug_printf("%s\n", __FUNCTION__);
 170
 171    drm_intel_bufmgr_destroy(idws->gem);
 172
 173    FREE(idws);
 174 }
 175
 176 static struct pipe_screen *
 177 i965_libdrm_create_screen(struct drm_api *api, int drmFD,
 178                           struct drm_create_screen_arg *arg)
 179 {
 180    struct i965_libdrm_winsys *idws;
 181    unsigned int deviceID;
 182
 183    debug_printf("%s\n", __FUNCTION__);
 184
 185    if (arg != NULL) {
 186       switch(arg->mode) {
 187       case DRM_CREATE_NORMAL:
 188          break;
 189       default:
 190          return NULL;
 191       }
 192    }
 193
 194    idws = CALLOC_STRUCT(i965_libdrm_winsys);
 195    if (!idws)
 196       return NULL;
 197
 198    i965_libdrm_get_device_id(&deviceID);
 199
 200    i965_libdrm_winsys_init_buffer_functions(idws);
 201
 202    idws->fd = drmFD;
 203    idws->id = deviceID;
 204
 205    idws->base.destroy = i965_libdrm_winsys_destroy;
 206
 207    idws->gem = drm_intel_bufmgr_gem_init(idws->fd, BRW_BATCH_SIZE);
 208    drm_intel_bufmgr_gem_enable_reuse(idws->gem);
 209
 210    idws->send_cmd = !debug_get_bool_option("BRW_NO_HW", FALSE);
 211
 212    return brw_create_screen(&idws->base, deviceID);
 213 }
 214
 215
 216 static void
 217 destroy(struct drm_api *api)
 218 {
 219    if (BRW_DUMP)
 220       debug_printf("%s\n", __FUNCTION__);
 221
 222 }
 223
 224 struct drm_api i965_libdrm_api =
 225 {
 226    .name = "i965",
 227    .create_screen = i965_libdrm_create_screen,
 228    .texture_from_shared_handle = i965_libdrm_texture_from_shared_handle,
 229    .shared_handle_from_texture = i965_libdrm_shared_handle_from_texture,
 230    .local_handle_from_texture = i965_libdrm_local_handle_from_texture,
 231    .destroy = destroy,
 232 };
 233
 234 struct drm_api *
 235 drm_api_create()
 236 {
 237    return trace_drm_create(&i965_libdrm_api);
 238 }