st/egl: Rename kms backend to drm.

The main use of the backend is to support EGL_MESA_drm_display.  drm
should be a better name.

3 files changed, 1005 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/egl/drm/modeset.c b/src/gallium/state_trackers/egl/drm/modeset.c
new file mode 100644
index 0000000000..5d6a07e2fd
--- /dev/null
+++ b/src/gallium/state_trackers/egl/drm/modeset.c
@@ -0,0 +1,619 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+#include "egllog.h"
+
+#include "native_drm.h"
+
+static boolean
+kms_surface_validate(struct native_surface *nsurf, uint attachment_mask,
+                     unsigned int *seq_num, struct pipe_resource **textures,
+                     int *width, int *height)
+{
+   struct kms_surface *ksurf = kms_surface(nsurf);
+
+   if (!resource_surface_add_resources(ksurf->rsurf, attachment_mask))
+      return FALSE;
+   if (textures)
+      resource_surface_get_resources(ksurf->rsurf, textures, attachment_mask);
+
+   if (seq_num)
+      *seq_num = ksurf->sequence_number;
+   if (width)
+      *width = ksurf->width;
+   if (height)
+      *height = ksurf->height;
+
+   return TRUE;
+}
+
+/**
+ * Add textures as DRM framebuffers.
+ */
+static boolean
+kms_surface_init_framebuffers(struct native_surface *nsurf, boolean need_back)
+{
+   struct kms_surface *ksurf = kms_surface(nsurf);
+   struct kms_display *kdpy = ksurf->kdpy;
+   int num_framebuffers = (need_back) ? 2 : 1;
+   int i, err;
+
+   for (i = 0; i < num_framebuffers; i++) {
+      struct kms_framebuffer *fb;
+      enum native_attachment natt;
+      struct winsys_handle whandle;
+      uint block_bits;
+
+      if (i == 0) {
+         fb = &ksurf->front_fb;
+         natt = NATIVE_ATTACHMENT_FRONT_LEFT;
+      }
+      else {
+         fb = &ksurf->back_fb;
+         natt = NATIVE_ATTACHMENT_BACK_LEFT;
+      }
+
+      if (!fb->texture) {
+         /* make sure the texture has been allocated */
+         resource_surface_add_resources(ksurf->rsurf, 1 << natt);
+         fb->texture =
+            resource_surface_get_single_resource(ksurf->rsurf, natt);
+         if (!fb->texture)
+            return FALSE;
+      }
+
+      /* already initialized */
+      if (fb->buffer_id)
+         continue;
+
+      /* TODO detect the real value */
+      fb->is_passive = TRUE;
+
+      memset(&whandle, 0, sizeof(whandle));
+      whandle.type = DRM_API_HANDLE_TYPE_KMS;
+
+      if (!kdpy->base.screen->resource_get_handle(kdpy->base.screen,
+               fb->texture, &whandle))
+         return FALSE;
+
+      block_bits = util_format_get_blocksizebits(ksurf->color_format);
+      err = drmModeAddFB(kdpy->fd, ksurf->width, ksurf->height,
+            block_bits, block_bits, whandle.stride, whandle.handle,
+            &fb->buffer_id);
+      if (err) {
+         fb->buffer_id = 0;
+         return FALSE;
+      }
+   }
+
+   return TRUE;
+}
+
+static boolean
+kms_surface_flush_frontbuffer(struct native_surface *nsurf)
+{
+#ifdef DRM_MODE_FEATURE_DIRTYFB
+   struct kms_surface *ksurf = kms_surface(nsurf);
+   struct kms_display *kdpy = ksurf->kdpy;
+
+   if (ksurf->front_fb.is_passive)
+      drmModeDirtyFB(kdpy->fd, ksurf->front_fb.buffer_id, NULL, 0);
+#endif
+
+   return TRUE;
+}
+
+static boolean
+kms_surface_swap_buffers(struct native_surface *nsurf)
+{
+   struct kms_surface *ksurf = kms_surface(nsurf);
+   struct kms_crtc *kcrtc = &ksurf->current_crtc;
+   struct kms_display *kdpy = ksurf->kdpy;
+   struct kms_framebuffer tmp_fb;
+   int err;
+
+   if (!ksurf->back_fb.buffer_id) {
+      if (!kms_surface_init_framebuffers(&ksurf->base, TRUE))
+         return FALSE;
+   }
+
+   if (ksurf->is_shown && kcrtc->crtc) {
+      err = drmModeSetCrtc(kdpy->fd, kcrtc->crtc->crtc_id,
+            ksurf->back_fb.buffer_id, kcrtc->crtc->x, kcrtc->crtc->y,
+            kcrtc->connectors, kcrtc->num_connectors, &kcrtc->crtc->mode);
+      if (err)
+         return FALSE;
+   }
+
+   /* swap the buffers */
+   tmp_fb = ksurf->front_fb;
+   ksurf->front_fb = ksurf->back_fb;
+   ksurf->back_fb = tmp_fb;
+
+   resource_surface_swap_buffers(ksurf->rsurf,
+         NATIVE_ATTACHMENT_FRONT_LEFT, NATIVE_ATTACHMENT_BACK_LEFT, FALSE);
+   /* the front/back textures are swapped */
+   ksurf->sequence_number++;
+   kdpy->event_handler->invalid_surface(&kdpy->base,
+         &ksurf->base, ksurf->sequence_number);
+
+   return TRUE;
+}
+
+static void
+kms_surface_wait(struct native_surface *nsurf)
+{
+   /* no-op */
+}
+
+static void
+kms_surface_destroy(struct native_surface *nsurf)
+{
+   struct kms_surface *ksurf = kms_surface(nsurf);
+
+   if (ksurf->current_crtc.crtc)
+         drmModeFreeCrtc(ksurf->current_crtc.crtc);
+
+   if (ksurf->front_fb.buffer_id)
+      drmModeRmFB(ksurf->kdpy->fd, ksurf->front_fb.buffer_id);
+   pipe_resource_reference(&ksurf->front_fb.texture, NULL);
+
+   if (ksurf->back_fb.buffer_id)
+      drmModeRmFB(ksurf->kdpy->fd, ksurf->back_fb.buffer_id);
+   pipe_resource_reference(&ksurf->back_fb.texture, NULL);
+
+   resource_surface_destroy(ksurf->rsurf);
+   FREE(ksurf);
+}
+
+static struct kms_surface *
+kms_display_create_surface(struct native_display *ndpy,
+                           const struct native_config *nconf,
+                           uint width, uint height)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   struct kms_config *kconf = kms_config(nconf);
+   struct kms_surface *ksurf;
+
+   ksurf = CALLOC_STRUCT(kms_surface);
+   if (!ksurf)
+      return NULL;
+
+   ksurf->kdpy = kdpy;
+   ksurf->color_format = kconf->base.color_format;
+   ksurf->width = width;
+   ksurf->height = height;
+
+   ksurf->rsurf = resource_surface_create(kdpy->base.screen,
+         ksurf->color_format,
+         PIPE_BIND_RENDER_TARGET |
+         PIPE_BIND_SAMPLER_VIEW |
+         PIPE_BIND_DISPLAY_TARGET |
+         PIPE_BIND_SCANOUT);
+   if (!ksurf->rsurf) {
+      FREE(ksurf);
+      return NULL;
+   }
+
+   resource_surface_set_size(ksurf->rsurf, ksurf->width, ksurf->height);
+
+   ksurf->base.destroy = kms_surface_destroy;
+   ksurf->base.swap_buffers = kms_surface_swap_buffers;
+   ksurf->base.flush_frontbuffer = kms_surface_flush_frontbuffer;
+   ksurf->base.validate = kms_surface_validate;
+   ksurf->base.wait = kms_surface_wait;
+
+   return ksurf;
+}
+
+/**
+ * Choose a CRTC that supports all given connectors.
+ */
+static uint32_t
+kms_display_choose_crtc(struct native_display *ndpy,
+                        uint32_t *connectors, int num_connectors)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   int idx;
+
+   for (idx = 0; idx < kdpy->resources->count_crtcs; idx++) {
+      boolean found_crtc = TRUE;
+      int i, j;
+
+      for (i = 0; i < num_connectors; i++) {
+         drmModeConnectorPtr connector;
+         int encoder_idx = -1;
+
+         connector = drmModeGetConnector(kdpy->fd, connectors[i]);
+         if (!connector) {
+            found_crtc = FALSE;
+            break;
+         }
+
+         /* find an encoder the CRTC supports */
+         for (j = 0; j < connector->count_encoders; j++) {
+            drmModeEncoderPtr encoder =
+               drmModeGetEncoder(kdpy->fd, connector->encoders[j]);
+            if (encoder->possible_crtcs & (1 << idx)) {
+               encoder_idx = j;
+               break;
+            }
+            drmModeFreeEncoder(encoder);
+         }
+
+         drmModeFreeConnector(connector);
+         if (encoder_idx < 0) {
+            found_crtc = FALSE;
+            break;
+         }
+      }
+
+      if (found_crtc)
+         break;
+   }
+
+   if (idx >= kdpy->resources->count_crtcs) {
+      _eglLog(_EGL_WARNING,
+            "failed to find a CRTC that supports the given %d connectors",
+            num_connectors);
+      return 0;
+   }
+
+   return kdpy->resources->crtcs[idx];
+}
+
+/**
+ * Remember the original CRTC status and set the CRTC
+ */
+static boolean
+kms_display_set_crtc(struct native_display *ndpy, int crtc_idx,
+                     uint32_t buffer_id, uint32_t x, uint32_t y,
+                     uint32_t *connectors, int num_connectors,
+                     drmModeModeInfoPtr mode)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   struct kms_crtc *kcrtc = &kdpy->saved_crtcs[crtc_idx];
+   uint32_t crtc_id;
+   int err;
+
+   if (kcrtc->crtc) {
+      crtc_id = kcrtc->crtc->crtc_id;
+   }
+   else {
+      int count = 0, i;
+
+      /*
+       * Choose the CRTC once.  It could be more dynamic, but let's keep it
+       * simple for now.
+       */
+      crtc_id = kms_display_choose_crtc(&kdpy->base,
+            connectors, num_connectors);
+
+      /* save the original CRTC status */
+      kcrtc->crtc = drmModeGetCrtc(kdpy->fd, crtc_id);
+      if (!kcrtc->crtc)
+         return FALSE;
+
+      for (i = 0; i < kdpy->num_connectors; i++) {
+         struct kms_connector *kconn = &kdpy->connectors[i];
+         drmModeConnectorPtr connector = kconn->connector;
+         drmModeEncoderPtr encoder;
+
+         encoder = drmModeGetEncoder(kdpy->fd, connector->encoder_id);
+         if (encoder) {
+            if (encoder->crtc_id == crtc_id) {
+               kcrtc->connectors[count++] = connector->connector_id;
+               if (count >= Elements(kcrtc->connectors))
+                  break;
+            }
+            drmModeFreeEncoder(encoder);
+         }
+      }
+
+      kcrtc->num_connectors = count;
+   }
+
+   err = drmModeSetCrtc(kdpy->fd, crtc_id, buffer_id, x, y,
+         connectors, num_connectors, mode);
+   if (err) {
+      drmModeFreeCrtc(kcrtc->crtc);
+      kcrtc->crtc = NULL;
+      kcrtc->num_connectors = 0;
+
+      return FALSE;
+   }
+
+   return TRUE;
+}
+
+static boolean
+kms_display_program(struct native_display *ndpy, int crtc_idx,
+                    struct native_surface *nsurf, uint x, uint y,
+                    const struct native_connector **nconns, int num_nconns,
+                    const struct native_mode *nmode)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   struct kms_surface *ksurf = kms_surface(nsurf);
+   const struct kms_mode *kmode = kms_mode(nmode);
+   uint32_t connector_ids[32];
+   uint32_t buffer_id;
+   drmModeModeInfo mode_tmp, *mode;
+   int i;
+
+   if (num_nconns > Elements(connector_ids)) {
+      _eglLog(_EGL_WARNING, "too many connectors (%d)", num_nconns);
+      num_nconns = Elements(connector_ids);
+   }
+
+   if (ksurf) {
+      if (!kms_surface_init_framebuffers(&ksurf->base, FALSE))
+         return FALSE;
+
+      buffer_id = ksurf->front_fb.buffer_id;
+      /* the mode argument of drmModeSetCrtc is not constified */
+      mode_tmp = kmode->mode;
+      mode = &mode_tmp;
+   }
+   else {
+      /* disable the CRTC */
+      buffer_id = 0;
+      mode = NULL;
+      num_nconns = 0;
+   }
+
+   for (i = 0; i < num_nconns; i++) {
+      struct kms_connector *kconn = kms_connector(nconns[i]);
+      connector_ids[i] = kconn->connector->connector_id;
+   }
+
+   if (!kms_display_set_crtc(&kdpy->base, crtc_idx, buffer_id, x, y,
+            connector_ids, num_nconns, mode)) {
+      _eglLog(_EGL_WARNING, "failed to set CRTC %d", crtc_idx);
+
+      return FALSE;
+   }
+
+   if (kdpy->shown_surfaces[crtc_idx])
+      kdpy->shown_surfaces[crtc_idx]->is_shown = FALSE;
+   kdpy->shown_surfaces[crtc_idx] = ksurf;
+
+   /* remember the settings for buffer swapping */
+   if (ksurf) {
+      uint32_t crtc_id = kdpy->saved_crtcs[crtc_idx].crtc->crtc_id;
+      struct kms_crtc *kcrtc = &ksurf->current_crtc;
+
+      if (kcrtc->crtc)
+         drmModeFreeCrtc(kcrtc->crtc);
+      kcrtc->crtc = drmModeGetCrtc(kdpy->fd, crtc_id);
+
+      assert(num_nconns < Elements(kcrtc->connectors));
+      memcpy(kcrtc->connectors, connector_ids,
+            sizeof(*connector_ids) * num_nconns);
+      kcrtc->num_connectors = num_nconns;
+
+      ksurf->is_shown = TRUE;
+   }
+
+   return TRUE;
+}
+
+static const struct native_mode **
+kms_display_get_modes(struct native_display *ndpy,
+                      const struct native_connector *nconn,
+                      int *num_modes)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   struct kms_connector *kconn = kms_connector(nconn);
+   const struct native_mode **nmodes_return;
+   int count, i;
+
+   /* delete old data */
+   if (kconn->connector) {
+      drmModeFreeConnector(kconn->connector);
+      FREE(kconn->kms_modes);
+
+      kconn->connector = NULL;
+      kconn->kms_modes = NULL;
+      kconn->num_modes = 0;
+   }
+
+   /* detect again */
+   kconn->connector = drmModeGetConnector(kdpy->fd, kconn->connector_id);
+   if (!kconn->connector)
+      return NULL;
+
+   count = kconn->connector->count_modes;
+   kconn->kms_modes = CALLOC(count, sizeof(*kconn->kms_modes));
+   if (!kconn->kms_modes) {
+      drmModeFreeConnector(kconn->connector);
+      kconn->connector = NULL;
+
+      return NULL;
+   }
+
+   for (i = 0; i < count; i++) {
+      struct kms_mode *kmode = &kconn->kms_modes[i];
+      drmModeModeInfoPtr mode = &kconn->connector->modes[i];
+
+      kmode->mode = *mode;
+
+      kmode->base.desc = kmode->mode.name;
+      kmode->base.width = kmode->mode.hdisplay;
+      kmode->base.height = kmode->mode.vdisplay;
+      kmode->base.refresh_rate = kmode->mode.vrefresh;
+      /* not all kernels have vrefresh = refresh_rate * 1000 */
+      if (kmode->base.refresh_rate > 1000)
+         kmode->base.refresh_rate = (kmode->base.refresh_rate + 500) / 1000;
+   }
+
+   nmodes_return = MALLOC(count * sizeof(*nmodes_return));
+   if (nmodes_return) {
+      for (i = 0; i < count; i++)
+         nmodes_return[i] = &kconn->kms_modes[i].base;
+      if (num_modes)
+         *num_modes = count;
+   }
+
+   return nmodes_return;
+}
+
+static const struct native_connector **
+kms_display_get_connectors(struct native_display *ndpy, int *num_connectors,
+                           int *num_crtc)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   const struct native_connector **connectors;
+   int i;
+
+   if (!kdpy->connectors) {
+      kdpy->connectors =
+         CALLOC(kdpy->resources->count_connectors, sizeof(*kdpy->connectors));
+      if (!kdpy->connectors)
+         return NULL;
+
+      for (i = 0; i < kdpy->resources->count_connectors; i++) {
+         struct kms_connector *kconn = &kdpy->connectors[i];
+
+         kconn->connector_id = kdpy->resources->connectors[i];
+         /* kconn->connector is allocated when the modes are asked */
+      }
+
+      kdpy->num_connectors = kdpy->resources->count_connectors;
+   }
+
+   connectors = MALLOC(kdpy->num_connectors * sizeof(*connectors));
+   if (connectors) {
+      for (i = 0; i < kdpy->num_connectors; i++)
+         connectors[i] = &kdpy->connectors[i].base;
+      if (num_connectors)
+         *num_connectors = kdpy->num_connectors;
+   }
+
+   if (num_crtc)
+      *num_crtc = kdpy->resources->count_crtcs;
+
+   return connectors;
+}
+
+static struct native_surface *
+kms_display_create_scanout_surface(struct native_display *ndpy,
+                                   const struct native_config *nconf,
+                                   uint width, uint height)
+{
+   struct kms_surface *ksurf;
+
+   ksurf = kms_display_create_surface(ndpy, nconf, width, height);
+   return &ksurf->base;
+}
+
+static struct native_display_modeset kms_display_modeset = {
+   .get_connectors = kms_display_get_connectors,
+   .get_modes = kms_display_get_modes,
+   .create_scanout_surface = kms_display_create_scanout_surface,
+   .program = kms_display_program
+};
+
+void
+kms_display_fini_modeset(struct native_display *ndpy)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   int i;
+
+   if (kdpy->connectors) {
+      for (i = 0; i < kdpy->num_connectors; i++) {
+         struct kms_connector *kconn = &kdpy->connectors[i];
+         if (kconn->connector) {
+            drmModeFreeConnector(kconn->connector);
+            FREE(kconn->kms_modes);
+         }
+      }
+      FREE(kdpy->connectors);
+   }
+
+   if (kdpy->shown_surfaces) {
+      FREE(kdpy->shown_surfaces);
+      kdpy->shown_surfaces = NULL;
+   }
+
+   if (kdpy->saved_crtcs) {
+      for (i = 0; i < kdpy->resources->count_crtcs; i++) {
+         struct kms_crtc *kcrtc = &kdpy->saved_crtcs[i];
+
+         if (kcrtc->crtc) {
+            /* restore crtc */
+            drmModeSetCrtc(kdpy->fd, kcrtc->crtc->crtc_id,
+                  kcrtc->crtc->buffer_id, kcrtc->crtc->x, kcrtc->crtc->y,
+                  kcrtc->connectors, kcrtc->num_connectors,
+                  &kcrtc->crtc->mode);
+
+            drmModeFreeCrtc(kcrtc->crtc);
+         }
+      }
+      FREE(kdpy->saved_crtcs);
+   }
+
+   if (kdpy->resources) {
+      drmModeFreeResources(kdpy->resources);
+      kdpy->resources = NULL;
+   }
+
+   kdpy->base.modeset = NULL;
+}
+
+boolean
+kms_display_init_modeset(struct native_display *ndpy)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+
+   /* resources are fixed, unlike crtc, connector, or encoder */
+   kdpy->resources = drmModeGetResources(kdpy->fd);
+   if (!kdpy->resources) {
+      _eglLog(_EGL_DEBUG, "Failed to get KMS resources.  Disable modeset.");
+      return FALSE;
+   }
+
+   kdpy->saved_crtcs =
+      CALLOC(kdpy->resources->count_crtcs, sizeof(*kdpy->saved_crtcs));
+   if (!kdpy->saved_crtcs) {
+      kms_display_fini_modeset(&kdpy->base);
+      return FALSE;
+   }
+
+   kdpy->shown_surfaces =
+      CALLOC(kdpy->resources->count_crtcs, sizeof(*kdpy->shown_surfaces));
+   if (!kdpy->shown_surfaces) {
+      kms_display_fini_modeset(&kdpy->base);
+      return FALSE;
+   }
+
+   kdpy->base.modeset = &kms_display_modeset;
+
+   return TRUE;
+}
diff --git a/src/gallium/state_trackers/egl/drm/native_drm.c b/src/gallium/state_trackers/egl/drm/native_drm.c
new file mode 100644
index 0000000000..8ffdde66ba
--- /dev/null
+++ b/src/gallium/state_trackers/egl/drm/native_drm.c
@@ -0,0 +1,240 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.8
+ *
+ * Copyright (C) 2010 Chia-I Wu <olv@0xlab.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "util/u_memory.h"
+#include "egllog.h"
+
+#include "native_drm.h"
+
+/* see get_drm_screen_name */
+#include <radeon_drm.h>
+#include "radeon/drm/radeon_drm.h"
+
+static boolean
+kms_display_is_format_supported(struct native_display *ndpy,
+                                enum pipe_format fmt, boolean is_color)
+{
+   return ndpy->screen->is_format_supported(ndpy->screen,
+         fmt, PIPE_TEXTURE_2D, 0,
+         (is_color) ? PIPE_BIND_RENDER_TARGET :
+         PIPE_BIND_DEPTH_STENCIL, 0);
+}
+
+static const struct native_config **
+kms_display_get_configs(struct native_display *ndpy, int *num_configs)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   const struct native_config **configs;
+
+   /* first time */
+   if (!kdpy->config) {
+      struct native_config *nconf;
+      enum pipe_format format;
+
+      kdpy->config = CALLOC(1, sizeof(*kdpy->config));
+      if (!kdpy->config)
+         return NULL;
+
+      nconf = &kdpy->config->base;
+
+      nconf->buffer_mask =
+         (1 << NATIVE_ATTACHMENT_FRONT_LEFT) |
+         (1 << NATIVE_ATTACHMENT_BACK_LEFT);
+
+      format = PIPE_FORMAT_B8G8R8A8_UNORM;
+      if (!kms_display_is_format_supported(&kdpy->base, format, TRUE)) {
+         format = PIPE_FORMAT_A8R8G8B8_UNORM;
+         if (!kms_display_is_format_supported(&kdpy->base, format, TRUE))
+            format = PIPE_FORMAT_NONE;
+      }
+      if (format == PIPE_FORMAT_NONE) {
+         FREE(kdpy->config);
+         kdpy->config = NULL;
+         return NULL;
+      }
+
+      nconf->color_format = format;
+
+      /* support KMS */
+      if (kdpy->resources)
+         nconf->scanout_bit = TRUE;
+   }
+
+   configs = MALLOC(sizeof(*configs));
+   if (configs) {
+      configs[0] = &kdpy->config->base;
+      if (num_configs)
+         *num_configs = 1;
+   }
+
+   return configs;
+}
+
+static int
+kms_display_get_param(struct native_display *ndpy,
+                      enum native_param_type param)
+{
+   int val;
+
+   switch (param) {
+   default:
+      val = 0;
+      break;
+   }
+
+   return val;
+}
+
+static void
+kms_display_destroy(struct native_display *ndpy)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+
+   if (kdpy->config)
+      FREE(kdpy->config);
+
+   kms_display_fini_modeset(&kdpy->base);
+
+   if (kdpy->base.screen)
+      kdpy->base.screen->destroy(kdpy->base.screen);
+
+   if (kdpy->fd >= 0)
+      close(kdpy->fd);
+
+   FREE(kdpy);
+}
+
+static const char *
+get_drm_screen_name(int fd, drmVersionPtr version)
+{
+   const char *name = version->name;
+
+   if (name && !strcmp(name, "radeon")) {
+      int chip_id;
+      struct drm_radeon_info info;
+
+      memset(&info, 0, sizeof(info));
+      info.request = RADEON_INFO_DEVICE_ID;
+      info.value = pointer_to_intptr(&chip_id);
+      if (drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info)) != 0)
+         return NULL;
+
+      name = is_r3xx(chip_id) ? "r300" : "r600";
+   }
+
+   return name;
+}
+
+/**
+ * Initialize KMS and pipe screen.
+ */
+static boolean
+kms_display_init_screen(struct native_display *ndpy)
+{
+   struct kms_display *kdpy = kms_display(ndpy);
+   drmVersionPtr version;
+   const char *name;
+
+   version = drmGetVersion(kdpy->fd);
+   if (!version) {
+      _eglLog(_EGL_WARNING, "invalid fd %d", kdpy->fd);
+      return FALSE;
+   }
+
+   name = get_drm_screen_name(kdpy->fd, version);
+   if (name) {
+      kdpy->base.screen =
+         kdpy->event_handler->new_drm_screen(&kdpy->base, name, kdpy->fd);
+   }
+   drmFreeVersion(version);
+
+   if (!kdpy->base.screen) {
+      _eglLog(_EGL_WARNING, "failed to create DRM screen");
+      return FALSE;
+   }
+
+   return TRUE;
+}
+
+static struct native_display *
+kms_create_display(int fd, struct native_event_handler *event_handler,
+                   void *user_data)
+{
+   struct kms_display *kdpy;
+
+   kdpy = CALLOC_STRUCT(kms_display);
+   if (!kdpy)
+      return NULL;
+
+   kdpy->fd = fd;
+   kdpy->event_handler = event_handler;
+   kdpy->base.user_data = user_data;
+
+   if (!kms_display_init_screen(&kdpy->base)) {
+      kms_display_destroy(&kdpy->base);
+      return NULL;
+   }
+
+   kdpy->base.destroy = kms_display_destroy;
+   kdpy->base.get_param = kms_display_get_param;
+   kdpy->base.get_configs = kms_display_get_configs;
+
+   kms_display_init_modeset(&kdpy->base);
+
+   return &kdpy->base;
+}
+
+static struct native_display *
+native_create_display(void *dpy, struct native_event_handler *event_handler,
+                      void *user_data)
+{
+   int fd;
+
+   if (dpy) {
+      fd = dup((int) pointer_to_intptr(dpy));
+   }
+   else {
+      fd = open("/dev/dri/card0", O_RDWR);
+   }
+   if (fd < 0)
+      return NULL;
+
+   return kms_create_display(fd, event_handler, user_data);
+}
+
+static const struct native_platform drm_platform = {
+   "DRM", /* name */
+   native_create_display
+};
+
+const struct native_platform *
+native_get_drm_platform(void)
+{
+   return &drm_platform;
+}
diff --git a/src/gallium/state_trackers/egl/drm/native_drm.h b/src/gallium/state_trackers/egl/drm/native_drm.h
new file mode 100644
index 0000000000..3a9b1a6788
--- /dev/null
+++ b/src/gallium/state_trackers/egl/drm/native_drm.h
@@ -0,0 +1,146 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.8
+ *
+ * Copyright (C) 2010 Chia-I Wu <olv@0xlab.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _NATIVE_KMS_H_
+#define _NATIVE_KMS_H_
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include "pipe/p_compiler.h"
+#include "util/u_format.h"
+#include "pipe/p_state.h"
+#include "state_tracker/drm_driver.h"
+
+#include "common/native.h"
+#include "common/native_helper.h"
+
+struct kms_config;
+struct kms_crtc;
+struct kms_connector;
+struct kms_mode;
+struct kms_surface;
+
+struct kms_display {
+   struct native_display base;
+
+   struct native_event_handler *event_handler;
+
+   int fd;
+   struct kms_config *config;
+
+   /* for modesetting */
+   drmModeResPtr resources;
+   struct kms_connector *connectors;
+   int num_connectors;
+
+   struct kms_surface **shown_surfaces;
+   /* save the original settings of the CRTCs */
+   struct kms_crtc *saved_crtcs;
+};
+
+struct kms_config {
+   struct native_config base;
+};
+
+struct kms_crtc {
+   drmModeCrtcPtr crtc;
+   uint32_t connectors[32];
+   int num_connectors;
+};
+
+struct kms_framebuffer {
+   struct pipe_resource *texture;
+   boolean is_passive;
+
+   uint32_t buffer_id;
+};
+
+struct kms_surface {
+   struct native_surface base;
+   struct kms_display *kdpy;
+
+   struct resource_surface *rsurf;
+   enum pipe_format color_format;
+   int width, height;
+
+   unsigned int sequence_number;
+   struct kms_framebuffer front_fb, back_fb;
+
+   boolean is_shown;
+   struct kms_crtc current_crtc;
+};
+
+struct kms_connector {
+   struct native_connector base;
+
+   uint32_t connector_id;
+   drmModeConnectorPtr connector;
+   struct kms_mode *kms_modes;
+   int num_modes;
+};
+
+struct kms_mode {
+   struct native_mode base;
+   drmModeModeInfo mode;
+};
+
+static INLINE struct kms_display *
+kms_display(const struct native_display *ndpy)
+{
+   return (struct kms_display *) ndpy;
+}
+
+static INLINE struct kms_config *
+kms_config(const struct native_config *nconf)
+{
+   return (struct kms_config *) nconf;
+}
+
+static INLINE struct kms_surface *
+kms_surface(const struct native_surface *nsurf)
+{
+   return (struct kms_surface *) nsurf;
+}
+
+static INLINE struct kms_connector *
+kms_connector(const struct native_connector *nconn)
+{
+   return (struct kms_connector *) nconn;
+}
+
+static INLINE struct kms_mode *
+kms_mode(const struct native_mode *nmode)
+{
+   return (struct kms_mode *) nmode;
+}
+
+boolean
+kms_display_init_modeset(struct native_display *ndpy);
+
+void
+kms_display_fini_modeset(struct native_display *ndpy);
+
+#endif /* _NATIVE_KMS_H_ */