1 files changed, 436 insertions, 194 deletions

diff --git a/src/gallium/state_trackers/xorg/xorg_driver.c b/src/gallium/state_trackers/xorg/xorg_driver.c
index 26cf2dd772..b02fe68f31 100644
--- a/src/gallium/state_trackers/xorg/xorg_driver.c
+++ b/src/gallium/state_trackers/xorg/xorg_driver.c
@@ -56,32 +56,38 @@
 #include "xorg_tracker.h"
 #include "xorg_winsys.h"
 
-static void AdjustFrame(int scrnIndex, int x, int y, int flags);
-static Bool CloseScreen(int scrnIndex, ScreenPtr pScreen);
-static Bool EnterVT(int scrnIndex, int flags);
-static Bool SaveHWState(ScrnInfoPtr pScrn);
-static Bool RestoreHWState(ScrnInfoPtr pScrn);
-
-
-static ModeStatus ValidMode(int scrnIndex, DisplayModePtr mode, Bool verbose,
-			    int flags);
-static void FreeScreen(int scrnIndex, int flags);
-static void LeaveVT(int scrnIndex, int flags);
-static Bool SwitchMode(int scrnIndex, DisplayModePtr mode, int flags);
-static Bool ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc,
-		       char **argv);
-static Bool PreInit(ScrnInfoPtr pScrn, int flags);
+#ifdef HAVE_LIBKMS
+#include "libkms.h"
+#endif
+
+/*
+ * Functions and symbols exported to Xorg via pointers.
+ */
+
+static Bool drv_pre_init(ScrnInfoPtr pScrn, int flags);
+static Bool drv_screen_init(int scrnIndex, ScreenPtr pScreen, int argc,
+			    char **argv);
+static Bool drv_switch_mode(int scrnIndex, DisplayModePtr mode, int flags);
+static void drv_adjust_frame(int scrnIndex, int x, int y, int flags);
+static Bool drv_enter_vt(int scrnIndex, int flags);
+static void drv_leave_vt(int scrnIndex, int flags);
+static void drv_free_screen(int scrnIndex, int flags);
+static ModeStatus drv_valid_mode(int scrnIndex, DisplayModePtr mode, Bool verbose,
+			         int flags);
 
 typedef enum
 {
     OPTION_SW_CURSOR,
-} modesettingOpts;
+    OPTION_2D_ACCEL,
+} drv_option_enums;
 
-static const OptionInfoRec Options[] = {
+static const OptionInfoRec drv_options[] = {
     {OPTION_SW_CURSOR, "SWcursor", OPTV_BOOLEAN, {0}, FALSE},
+    {OPTION_2D_ACCEL, "2DAccel", OPTV_BOOLEAN, {0}, FALSE},
     {-1, NULL, OPTV_NONE, {0}, FALSE}
 };
 
+
 /*
  * Exported Xorg driver functions to winsys
  */
@@ -89,28 +95,39 @@ static const OptionInfoRec Options[] = {
 const OptionInfoRec *
 xorg_tracker_available_options(int chipid, int busid)
 {
-    return Options;
+    return drv_options;
 }
 
 void
 xorg_tracker_set_functions(ScrnInfoPtr scrn)
 {
-    scrn->PreInit = PreInit;
-    scrn->ScreenInit = ScreenInit;
-    scrn->SwitchMode = SwitchMode;
-    scrn->AdjustFrame = AdjustFrame;
-    scrn->EnterVT = EnterVT;
-    scrn->LeaveVT = LeaveVT;
-    scrn->FreeScreen = FreeScreen;
-    scrn->ValidMode = ValidMode;
+    scrn->PreInit = drv_pre_init;
+    scrn->ScreenInit = drv_screen_init;
+    scrn->SwitchMode = drv_switch_mode;
+    scrn->AdjustFrame = drv_adjust_frame;
+    scrn->EnterVT = drv_enter_vt;
+    scrn->LeaveVT = drv_leave_vt;
+    scrn->FreeScreen = drv_free_screen;
+    scrn->ValidMode = drv_valid_mode;
 }
 
+
+/*
+ * Internal function definitions
+ */
+
+static Bool drv_init_front_buffer_functions(ScrnInfoPtr pScrn);
+static Bool drv_close_screen(int scrnIndex, ScreenPtr pScreen);
+static Bool drv_save_hw_state(ScrnInfoPtr pScrn);
+static Bool drv_restore_hw_state(ScrnInfoPtr pScrn);
+
+
 /*
- * Static Xorg funtctions
+ * Internal functions
  */
 
 static Bool
-GetRec(ScrnInfoPtr pScrn)
+drv_get_rec(ScrnInfoPtr pScrn)
 {
     if (pScrn->driverPrivate)
 	return TRUE;
@@ -121,7 +138,7 @@ GetRec(ScrnInfoPtr pScrn)
 }
 
 static void
-FreeRec(ScrnInfoPtr pScrn)
+drv_free_rec(ScrnInfoPtr pScrn)
 {
     if (!pScrn)
 	return;
@@ -135,88 +152,21 @@ FreeRec(ScrnInfoPtr pScrn)
 }
 
 static void
-ProbeDDC(ScrnInfoPtr pScrn, int index)
+drv_probe_ddc(ScrnInfoPtr pScrn, int index)
 {
     ConfiguredMonitor = NULL;
 }
 
 static Bool
-CreateFrontBuffer(ScrnInfoPtr pScrn)
-{
-    modesettingPtr ms = modesettingPTR(pScrn);
-    unsigned handle, stride;
-    struct pipe_texture *tex;
-
-    ms->noEvict = TRUE;
-
-    tex = xorg_exa_create_root_texture(pScrn, pScrn->virtualX, pScrn->virtualY,
-				       pScrn->depth, pScrn->bitsPerPixel);
-
-    if (!tex)
-	return FALSE;
-
-    if (!ms->api->local_handle_from_texture(ms->api, ms->screen,
-					    tex,
-					    &stride,
-					    &handle))
-	return FALSE;
-
-    drmModeAddFB(ms->fd,
-		 pScrn->virtualX,
-		 pScrn->virtualY,
-		 pScrn->depth,
-		 pScrn->bitsPerPixel,
-		 stride,
-		 handle,
-                 &ms->fb_id);
-
-    pScrn->frameX0 = 0;
-    pScrn->frameY0 = 0;
-    AdjustFrame(pScrn->scrnIndex, pScrn->frameX0, pScrn->frameY0, 0);
-
-    pipe_texture_reference(&ms->root_texture, tex);
-    pipe_texture_reference(&tex, NULL);
-    return TRUE;
-}
-
-static Bool
-BindTextureToRoot(ScrnInfoPtr pScrn)
-{
-    modesettingPtr ms = modesettingPTR(pScrn);
-    ScreenPtr pScreen = pScrn->pScreen;
-    struct pipe_texture *check;
-    PixmapPtr rootPixmap;
-
-    rootPixmap = pScreen->GetScreenPixmap(pScreen);
-
-    xorg_exa_set_displayed_usage(rootPixmap);
-    xorg_exa_set_shared_usage(rootPixmap);
-    xorg_exa_set_texture(rootPixmap, ms->root_texture);
-    if (!pScreen->ModifyPixmapHeader(rootPixmap, -1, -1, -1, -1, -1, NULL))
-	FatalError("Couldn't adjust screen pixmap\n");
-
-    check = xorg_exa_get_texture(rootPixmap);
-    if (ms->root_texture != check)
-	FatalError("Created new root texture\n");
-
-    pipe_texture_reference(&check, NULL);
-
-    return TRUE;
-}
-
-static Bool
-crtc_resize(ScrnInfoPtr pScrn, int width, int height)
+drv_crtc_resize(ScrnInfoPtr pScrn, int width, int height)
 {
     modesettingPtr ms = modesettingPTR(pScrn);
-    unsigned handle, stride;
     PixmapPtr rootPixmap;
     ScreenPtr pScreen = pScrn->pScreen;
 
     if (width == pScrn->virtualX && height == pScrn->virtualY)
 	return TRUE;
 
-    ErrorF("RESIZING TO %dx%d\n", width, height);
-
     pScrn->virtualX = width;
     pScrn->virtualY = height;
 
@@ -224,44 +174,25 @@ crtc_resize(ScrnInfoPtr pScrn, int width, int height)
      * Remove the old framebuffer & texture.
      */
     drmModeRmFB(ms->fd, ms->fb_id);
-    pipe_texture_reference(&ms->root_texture, NULL);
-
+    if (!ms->destroy_front_buffer(pScrn))
+	FatalError("failed to destroy front buffer\n");
 
     rootPixmap = pScreen->GetScreenPixmap(pScreen);
     if (!pScreen->ModifyPixmapHeader(rootPixmap, width, height, -1, -1, -1, NULL))
 	return FALSE;
 
-    /* takes one ref */
-    ms->root_texture = xorg_exa_get_texture(rootPixmap);
-
-    if (!ms->api->local_handle_from_texture(ms->api, ms->screen,
-					    ms->root_texture,
-					    &stride,
-					    &handle))
-	FatalError("Could not get handle and stride from texture\n");
-
-    drmModeAddFB(ms->fd,
-		 pScrn->virtualX,
-		 pScrn->virtualY,
-		 pScrn->depth,
-		 pScrn->bitsPerPixel,
-		 stride,
-		 handle,
-                 &ms->fb_id);
-
-    /* HW dependent - FIXME */
-    pScrn->displayWidth = pScrn->virtualX;
+    pScrn->displayWidth = rootPixmap->devKind / (rootPixmap->drawable.bitsPerPixel / 8);
 
     /* now create new frontbuffer */
-    return CreateFrontBuffer(pScrn) && BindTextureToRoot(pScrn);
+    return ms->create_front_buffer(pScrn) && ms->bind_front_buffer(pScrn);
 }
 
 static const xf86CrtcConfigFuncsRec crtc_config_funcs = {
-    crtc_resize
+    .resize = drv_crtc_resize
 };
 
 static Bool
-InitDRM(ScrnInfoPtr pScrn)
+drv_init_drm(ScrnInfoPtr pScrn)
 {
     modesettingPtr ms = modesettingPTR(pScrn);
 
@@ -281,18 +212,77 @@ InitDRM(ScrnInfoPtr pScrn)
 	    return FALSE;
     }
 
-    if (!ms->api) {
-	ms->api = drm_api_create();
+    return TRUE;
+}
+
+static Bool
+drv_init_resource_management(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    /*
+    ScreenPtr pScreen = pScrn->pScreen;
+    PixmapPtr rootPixmap = pScreen->GetScreenPixmap(pScreen);
+    Bool fbAccessDisabled;
+    CARD8 *fbstart;
+     */
 
-	if (!ms->api)
-	    return FALSE;
+    if (ms->screen || ms->kms)
+	return TRUE;
+
+    ms->api = drm_api_create();
+    if (ms->api) {
+	ms->screen = ms->api->create_screen(ms->api, ms->fd, NULL);
+
+	if (ms->screen)
+	    return TRUE;
+
+	if (ms->api->destroy)
+	    ms->api->destroy(ms->api);
+
+	ms->api = NULL;
     }
 
+#ifdef HAVE_LIBKMS
+    if (!kms_create(ms->fd, &ms->kms))
+	return TRUE;
+#endif
+
+    return FALSE;
+}
+
+static Bool
+drv_close_resource_management(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    int i;
+
+    if (ms->screen) {
+	assert(ms->ctx == NULL);
+
+	for (i = 0; i < XORG_NR_FENCES; i++) {
+	    if (ms->fence[i]) {
+		ms->screen->fence_finish(ms->screen, ms->fence[i], 0);
+		ms->screen->fence_reference(ms->screen, &ms->fence[i], NULL);
+	    }
+	}
+	ms->screen->destroy(ms->screen);
+    }
+    ms->screen = NULL;
+
+    if (ms->api && ms->api->destroy)
+	ms->api->destroy(ms->api);
+    ms->api = NULL;
+
+#ifdef HAVE_LIBKMS
+    if (ms->kms)
+	kms_destroy(&ms->kms);
+#endif
+
     return TRUE;
 }
 
 static Bool
-PreInit(ScrnInfoPtr pScrn, int flags)
+drv_pre_init(ScrnInfoPtr pScrn, int flags)
 {
     xf86CrtcConfigPtr xf86_config;
     modesettingPtr ms;
@@ -307,12 +297,12 @@ PreInit(ScrnInfoPtr pScrn, int flags)
     pEnt = xf86GetEntityInfo(pScrn->entityList[0]);
 
     if (flags & PROBE_DETECT) {
-	ProbeDDC(pScrn, pEnt->index);
+	drv_probe_ddc(pScrn, pEnt->index);
 	return TRUE;
     }
 
     /* Allocate driverPrivate */
-    if (!GetRec(pScrn))
+    if (!drv_get_rec(pScrn))
 	return FALSE;
 
     ms = modesettingPTR(pScrn);
@@ -349,7 +339,7 @@ PreInit(ScrnInfoPtr pScrn, int flags)
 
     ms->fd = -1;
     ms->api = NULL;
-    if (!InitDRM(pScrn))
+    if (!drv_init_drm(pScrn))
 	return FALSE;
 
     pScrn->monitor = pScrn->confScreen->monitor;
@@ -381,9 +371,9 @@ PreInit(ScrnInfoPtr pScrn, int flags)
 
     /* Process the options */
     xf86CollectOptions(pScrn, NULL);
-    if (!(ms->Options = xalloc(sizeof(Options))))
+    if (!(ms->Options = xalloc(sizeof(drv_options))))
 	return FALSE;
-    memcpy(ms->Options, Options, sizeof(Options));
+    memcpy(ms->Options, drv_options, sizeof(drv_options));
     xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, ms->Options);
 
     /* Allocate an xf86CrtcConfig */
@@ -398,18 +388,18 @@ PreInit(ScrnInfoPtr pScrn, int flags)
 	ms->SWCursor = TRUE;
     }
 
-    SaveHWState(pScrn);
+    drv_save_hw_state(pScrn);
 
-    crtc_init(pScrn);
-    output_init(pScrn);
+    xorg_crtc_init(pScrn);
+    xorg_output_init(pScrn);
 
     if (!xf86InitialConfiguration(pScrn, TRUE)) {
 	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "No valid modes.\n");
-	RestoreHWState(pScrn);
+	drv_restore_hw_state(pScrn);
 	return FALSE;
     }
 
-    RestoreHWState(pScrn);
+    drv_restore_hw_state(pScrn);
 
     /*
      * If the driver can do gamma correction, it should call xf86SetGamma() here.
@@ -433,21 +423,23 @@ PreInit(ScrnInfoPtr pScrn, int flags)
     xf86SetDpi(pScrn, 0, 0);
 
     /* Load the required sub modules */
-    if (!xf86LoadSubModule(pScrn, "fb")) {
+    if (!xf86LoadSubModule(pScrn, "fb"))
 	return FALSE;
-    }
 
-    xf86LoadSubModule(pScrn, "exa");
+    /* XXX: these aren't needed when we are using libkms */
+    if (!xf86LoadSubModule(pScrn, "exa"))
+	return FALSE;
 
 #ifdef DRI2
-    xf86LoadSubModule(pScrn, "dri2");
+    if (!xf86LoadSubModule(pScrn, "dri2"))
+	return FALSE;
 #endif
 
     return TRUE;
 }
 
 static Bool
-SaveHWState(ScrnInfoPtr pScrn)
+drv_save_hw_state(ScrnInfoPtr pScrn)
 {
     /*xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);*/
 
@@ -455,24 +447,45 @@ SaveHWState(ScrnInfoPtr pScrn)
 }
 
 static Bool
-RestoreHWState(ScrnInfoPtr pScrn)
+drv_restore_hw_state(ScrnInfoPtr pScrn)
 {
     /*xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);*/
 
     return TRUE;
 }
 
-static void xorgBlockHandler(int i, pointer blockData, pointer pTimeout,
-                             pointer pReadmask)
+static void drv_block_handler(int i, pointer blockData, pointer pTimeout,
+                              pointer pReadmask)
 {
     ScreenPtr pScreen = screenInfo.screens[i];
     modesettingPtr ms = modesettingPTR(xf86Screens[pScreen->myNum]);
 
     pScreen->BlockHandler = ms->blockHandler;
     pScreen->BlockHandler(i, blockData, pTimeout, pReadmask);
-    pScreen->BlockHandler = xorgBlockHandler;
-
-    ms->ctx->flush(ms->ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
+    pScreen->BlockHandler = drv_block_handler;
+
+    if (ms->ctx) {
+       int j;
+
+       ms->ctx->flush(ms->ctx, PIPE_FLUSH_RENDER_CACHE, &ms->fence[XORG_NR_FENCES-1]);
+       
+       if (ms->fence[0])
+          ms->ctx->screen->fence_finish(ms->ctx->screen, ms->fence[0], 0);
+  
+       /* The amount of rendering generated by a block handler can be
+        * quite small.  Let us get a fair way ahead of hardware before
+        * throttling.
+        */
+       for (j = 0; j < XORG_NR_FENCES - 1; j++)
+          ms->screen->fence_reference(ms->screen,
+                                      &ms->fence[j],
+                                      ms->fence[j+1]);
+
+       ms->screen->fence_reference(ms->screen,
+                                   &ms->fence[XORG_NR_FENCES-1],
+                                   NULL);
+    }
+        
 
 #ifdef DRM_MODE_FEATURE_DIRTYFB
     {
@@ -482,7 +495,7 @@ static void xorgBlockHandler(int i, pointer blockData, pointer pTimeout,
 	if (num_cliprects) {
 	    drmModeClip *clip = alloca(num_cliprects * sizeof(drmModeClip));
 	    BoxPtr rect = REGION_RECTS(dirty);
-	    int i;
+	    int i, ret;
 
 	    /* XXX no need for copy? */
 	    for (i = 0; i < num_cliprects; i++, rect++) {
@@ -493,7 +506,11 @@ static void xorgBlockHandler(int i, pointer blockData, pointer pTimeout,
 	    }
 
 	    /* TODO query connector property to see if this is needed */
-	    drmModeDirtyFB(ms->fd, ms->fb_id, clip, num_cliprects);
+	    ret = drmModeDirtyFB(ms->fd, ms->fb_id, clip, num_cliprects);
+	    if (ret) {
+		debug_printf("%s: failed to send dirty (%i, %s)\n",
+			     __func__, ret, strerror(-ret));
+	    }
 
 	    DamageEmpty(ms->damage);
 	}
@@ -502,7 +519,7 @@ static void xorgBlockHandler(int i, pointer blockData, pointer pTimeout,
 }
 
 static Bool
-CreateScreenResources(ScreenPtr pScreen)
+drv_create_screen_resources(ScreenPtr pScreen)
 {
     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
     modesettingPtr ms = modesettingPTR(pScrn);
@@ -513,13 +530,13 @@ CreateScreenResources(ScreenPtr pScreen)
 
     pScreen->CreateScreenResources = ms->createScreenResources;
     ret = pScreen->CreateScreenResources(pScreen);
-    pScreen->CreateScreenResources = CreateScreenResources;
+    pScreen->CreateScreenResources = drv_create_screen_resources;
 
-    BindTextureToRoot(pScrn);
+    ms->bind_front_buffer(pScrn);
 
     ms->noEvict = FALSE;
 
-    AdjustFrame(pScrn->scrnIndex, pScrn->frameX0, pScrn->frameY0, 0);
+    drv_adjust_frame(pScrn->scrnIndex, pScrn->frameX0, pScrn->frameY0, 0);
 
 #ifdef DRM_MODE_FEATURE_DIRTYFB
     rootPixmap = pScreen->GetScreenPixmap(pScreen);
@@ -543,22 +560,25 @@ CreateScreenResources(ScreenPtr pScreen)
 }
 
 static Bool
-ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
+drv_screen_init(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 {
     ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
     modesettingPtr ms = modesettingPTR(pScrn);
     VisualPtr visual;
 
-    if (!InitDRM(pScrn))
+    if (!drv_init_drm(pScrn)) {
+	FatalError("Could not init DRM");
 	return FALSE;
+    }
 
-    if (!ms->screen) {
-	ms->screen = ms->api->create_screen(ms->api, ms->fd, NULL);
+    if (!drv_init_resource_management(pScrn)) {
+	FatalError("Could not init resource management (!pipe_screen && !libkms)");
+	return FALSE;
+    }
 
-	if (!ms->screen) {
-	    FatalError("Could not init pipe_screen\n");
-	    return FALSE;
-	}
+    if (!drv_init_front_buffer_functions(pScrn)) {
+	FatalError("Could not init front buffer manager");
+	return FALSE;
     }
 
     pScrn->pScreen = pScreen;
@@ -603,16 +623,22 @@ ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
     fbPictureInit(pScreen, NULL, 0);
 
     ms->blockHandler = pScreen->BlockHandler;
-    pScreen->BlockHandler = xorgBlockHandler;
+    pScreen->BlockHandler = drv_block_handler;
     ms->createScreenResources = pScreen->CreateScreenResources;
-    pScreen->CreateScreenResources = CreateScreenResources;
+    pScreen->CreateScreenResources = drv_create_screen_resources;
 
     xf86SetBlackWhitePixels(pScreen);
 
-    ms->exa = xorg_exa_init(pScrn);
-    ms->debug_fallback = debug_get_bool_option("XORG_DEBUG_FALLBACK", TRUE);
+    if (ms->screen) {
+	ms->exa = xorg_exa_init(pScrn, xf86ReturnOptValBool(ms->Options,
+							    OPTION_2D_ACCEL, TRUE));
+	ms->debug_fallback = debug_get_bool_option("XORG_DEBUG_FALLBACK", TRUE);
 
-    xorg_init_video(pScreen);
+	xorg_xv_init(pScreen);
+#ifdef DRI2
+	xorg_dri2_init(pScreen);
+#endif
+    }
 
     miInitializeBackingStore(pScreen);
     xf86SetBackingStore(pScreen);
@@ -631,7 +657,7 @@ ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 
     pScreen->SaveScreen = xf86SaveScreen;
     ms->CloseScreen = pScreen->CloseScreen;
-    pScreen->CloseScreen = CloseScreen;
+    pScreen->CloseScreen = drv_close_screen;
 
     if (!xf86CrtcScreenInit(pScreen))
 	return FALSE;
@@ -644,17 +670,14 @@ ScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
     if (serverGeneration == 1)
 	xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
 
-#if 1
-#ifdef DRI2
-    driScreenInit(pScreen);
-#endif
-#endif
+    if (ms->winsys_screen_init)
+	ms->winsys_screen_init(pScrn);
 
-    return EnterVT(scrnIndex, 1);
+    return drv_enter_vt(scrnIndex, 1);
 }
 
 static void
-AdjustFrame(int scrnIndex, int x, int y, int flags)
+drv_adjust_frame(int scrnIndex, int x, int y, int flags)
 {
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
     xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
@@ -670,23 +693,26 @@ AdjustFrame(int scrnIndex, int x, int y, int flags)
 }
 
 static void
-FreeScreen(int scrnIndex, int flags)
+drv_free_screen(int scrnIndex, int flags)
 {
-    FreeRec(xf86Screens[scrnIndex]);
+    drv_free_rec(xf86Screens[scrnIndex]);
 }
 
 static void
-LeaveVT(int scrnIndex, int flags)
+drv_leave_vt(int scrnIndex, int flags)
 {
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
     modesettingPtr ms = modesettingPTR(pScrn);
     xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
     int o;
 
+    if (ms->winsys_leave_vt)
+	ms->winsys_leave_vt(pScrn);
+
     for (o = 0; o < config->num_crtc; o++) {
 	xf86CrtcPtr crtc = config->crtc[o];
 
-	crtc_cursor_destroy(crtc);
+	xorg_crtc_cursor_destroy(crtc);
 
 	if (crtc->rotatedPixmap || crtc->rotatedData) {
 	    crtc->funcs->shadow_destroy(crtc, crtc->rotatedPixmap,
@@ -698,7 +724,7 @@ LeaveVT(int scrnIndex, int flags)
 
     drmModeRmFB(ms->fd, ms->fb_id);
 
-    RestoreHWState(pScrn);
+    drv_restore_hw_state(pScrn);
 
     if (drmDropMaster(ms->fd))
 	xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
@@ -711,7 +737,7 @@ LeaveVT(int scrnIndex, int flags)
  * This gets called when gaining control of the VT, and from ScreenInit().
  */
 static Bool
-EnterVT(int scrnIndex, int flags)
+drv_enter_vt(int scrnIndex, int flags)
 {
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
     modesettingPtr ms = modesettingPTR(pScrn);
@@ -733,23 +759,26 @@ EnterVT(int scrnIndex, int flags)
      */
     if (ms->SaveGeneration != serverGeneration) {
 	ms->SaveGeneration = serverGeneration;
-	SaveHWState(pScrn);
+	drv_save_hw_state(pScrn);
     }
 
-    if (!CreateFrontBuffer(pScrn))
+    if (!ms->create_front_buffer(pScrn))
 	return FALSE;
 
-    if (!flags && !BindTextureToRoot(pScrn))
+    if (!flags && !ms->bind_front_buffer(pScrn))
 	return FALSE;
 
     if (!xf86SetDesiredModes(pScrn))
 	return FALSE;
 
+    if (ms->winsys_enter_vt)
+	ms->winsys_enter_vt(pScrn);
+
     return TRUE;
 }
 
 static Bool
-SwitchMode(int scrnIndex, DisplayModePtr mode, int flags)
+drv_switch_mode(int scrnIndex, DisplayModePtr mode, int flags)
 {
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
 
@@ -757,16 +786,21 @@ SwitchMode(int scrnIndex, DisplayModePtr mode, int flags)
 }
 
 static Bool
-CloseScreen(int scrnIndex, ScreenPtr pScreen)
+drv_close_screen(int scrnIndex, ScreenPtr pScreen)
 {
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
     modesettingPtr ms = modesettingPTR(pScrn);
 
     if (pScrn->vtSema) {
-	LeaveVT(scrnIndex, 0);
+	drv_leave_vt(scrnIndex, 0);
     }
+
+    if (ms->winsys_screen_close)
+	ms->winsys_screen_close(pScrn);
+
 #ifdef DRI2
-    driCloseScreen(pScreen);
+    if (ms->screen)
+	xorg_dri2_close(pScreen);
 #endif
 
     pScreen->BlockHandler = ms->blockHandler;
@@ -780,14 +814,14 @@ CloseScreen(int scrnIndex, ScreenPtr pScreen)
     }
 #endif
 
-    pipe_texture_reference(&ms->root_texture, NULL);
+    drmModeRmFB(ms->fd, ms->fb_id);
+    ms->destroy_front_buffer(pScrn);
 
     if (ms->exa)
 	xorg_exa_close(pScrn);
+    ms->exa = NULL;
 
-    if (ms->api && ms->api->destroy)
-	ms->api->destroy(ms->api);
-    ms->api = NULL;
+    drv_close_resource_management(pScrn);
 
     drmClose(ms->fd);
     ms->fd = -1;
@@ -798,9 +832,217 @@ CloseScreen(int scrnIndex, ScreenPtr pScreen)
 }
 
 static ModeStatus
-ValidMode(int scrnIndex, DisplayModePtr mode, Bool verbose, int flags)
+drv_valid_mode(int scrnIndex, DisplayModePtr mode, Bool verbose, int flags)
 {
     return MODE_OK;
 }
 
+
+/*
+ * Front buffer backing store functions.
+ */
+
+static Bool
+drv_destroy_front_buffer_ga3d(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    pipe_texture_reference(&ms->root_texture, NULL);
+    return TRUE;
+}
+
+static Bool
+drv_create_front_buffer_ga3d(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    unsigned handle, stride;
+    struct pipe_texture *tex;
+    int ret;
+
+    ms->noEvict = TRUE;
+
+    tex = xorg_exa_create_root_texture(pScrn, pScrn->virtualX, pScrn->virtualY,
+				       pScrn->depth, pScrn->bitsPerPixel);
+
+    if (!tex)
+	return FALSE;
+
+    if (!ms->api->local_handle_from_texture(ms->api, ms->screen,
+					    tex,
+					    &stride,
+					    &handle))
+	goto err_destroy;
+
+    ret = drmModeAddFB(ms->fd,
+		       pScrn->virtualX,
+		       pScrn->virtualY,
+		       pScrn->depth,
+		       pScrn->bitsPerPixel,
+		       stride,
+		       handle,
+		       &ms->fb_id);
+    if (ret) {
+	debug_printf("%s: failed to create framebuffer (%i, %s)",
+		     __func__, ret, strerror(-ret));
+	goto err_destroy;
+    }
+
+    pScrn->frameX0 = 0;
+    pScrn->frameY0 = 0;
+    drv_adjust_frame(pScrn->scrnIndex, pScrn->frameX0, pScrn->frameY0, 0);
+
+    pipe_texture_reference(&ms->root_texture, tex);
+    pipe_texture_reference(&tex, NULL);
+
+    return TRUE;
+
+err_destroy:
+    pipe_texture_reference(&tex, NULL);
+    return FALSE;
+}
+
+static Bool
+drv_bind_front_buffer_ga3d(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    ScreenPtr pScreen = pScrn->pScreen;
+    PixmapPtr rootPixmap = pScreen->GetScreenPixmap(pScreen);
+    struct pipe_texture *check;
+
+    xorg_exa_set_displayed_usage(rootPixmap);
+    xorg_exa_set_shared_usage(rootPixmap);
+    xorg_exa_set_texture(rootPixmap, ms->root_texture);
+    if (!pScreen->ModifyPixmapHeader(rootPixmap, -1, -1, -1, -1, -1, NULL))
+	FatalError("Couldn't adjust screen pixmap\n");
+
+    check = xorg_exa_get_texture(rootPixmap);
+    if (ms->root_texture != check)
+	FatalError("Created new root texture\n");
+
+    pipe_texture_reference(&check, NULL);
+    return TRUE;
+}
+
+#ifdef HAVE_LIBKMS
+static Bool
+drv_destroy_front_buffer_kms(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    ScreenPtr pScreen = pScrn->pScreen;
+    PixmapPtr rootPixmap = pScreen->GetScreenPixmap(pScreen);
+
+    /* XXX Do something with the rootPixmap.
+     * This currently works fine but if we are getting crashes in
+     * the fb functions after VT switches maybe look more into it.
+     */
+    (void)rootPixmap;
+
+    if (!ms->root_bo)
+	return TRUE;
+
+    kms_bo_unmap(ms->root_bo);
+    kms_bo_destroy(&ms->root_bo);
+    return TRUE;
+}
+
+static Bool
+drv_create_front_buffer_kms(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    unsigned handle, stride;
+    struct kms_bo *bo;
+    unsigned attr[8];
+    int ret;
+
+    attr[0] = KMS_BO_TYPE;
+    attr[1] = KMS_BO_TYPE_SCANOUT;
+    attr[2] = KMS_WIDTH;
+    attr[3] = pScrn->virtualX;
+    attr[4] = KMS_HEIGHT;
+    attr[5] = pScrn->virtualY;
+    attr[6] = 0;
+
+    if (kms_bo_create(ms->kms, attr, &bo))
+	return FALSE;
+
+    if (kms_bo_get_prop(bo, KMS_PITCH, &stride))
+	goto err_destroy;
+
+    if (kms_bo_get_prop(bo, KMS_HANDLE, &handle))
+	goto err_destroy;
+
+    ret = drmModeAddFB(ms->fd,
+		       pScrn->virtualX,
+		       pScrn->virtualY,
+		       pScrn->depth,
+		       pScrn->bitsPerPixel,
+		       stride,
+		       handle,
+		       &ms->fb_id);
+    if (ret) {
+	debug_printf("%s: failed to create framebuffer (%i, %s)",
+		     __func__, ret, strerror(-ret));
+	goto err_destroy;
+    }
+
+    pScrn->frameX0 = 0;
+    pScrn->frameY0 = 0;
+    drv_adjust_frame(pScrn->scrnIndex, pScrn->frameX0, pScrn->frameY0, 0);
+    ms->root_bo = bo;
+
+    return TRUE;
+
+err_destroy:
+    kms_bo_destroy(&bo);
+    return FALSE;
+}
+
+static Bool
+drv_bind_front_buffer_kms(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    ScreenPtr pScreen = pScrn->pScreen;
+    PixmapPtr rootPixmap = pScreen->GetScreenPixmap(pScreen);
+    unsigned stride;
+    void *ptr;
+
+    if (kms_bo_get_prop(ms->root_bo, KMS_PITCH, &stride))
+	return FALSE;
+
+    if (kms_bo_map(ms->root_bo, &ptr))
+	goto err_destroy;
+
+    pScreen->ModifyPixmapHeader(rootPixmap,
+				pScreen->width,
+				pScreen->height,
+				pScreen->rootDepth,
+				pScrn->bitsPerPixel,
+				stride,
+				ptr);
+    return TRUE;
+
+err_destroy:
+    kms_bo_destroy(&ms->root_bo);
+    return FALSE;
+}
+#endif /* HAVE_LIBKMS */
+
+static Bool drv_init_front_buffer_functions(ScrnInfoPtr pScrn)
+{
+    modesettingPtr ms = modesettingPTR(pScrn);
+    if (ms->screen) {
+	ms->destroy_front_buffer = drv_destroy_front_buffer_ga3d;
+	ms->create_front_buffer = drv_create_front_buffer_ga3d;
+	ms->bind_front_buffer = drv_bind_front_buffer_ga3d;
+#ifdef HAVE_LIBKMS
+    } else if (ms->kms) {
+	ms->destroy_front_buffer = drv_destroy_front_buffer_kms;
+	ms->create_front_buffer = drv_create_front_buffer_kms;
+	ms->bind_front_buffer = drv_bind_front_buffer_kms;
+#endif
+    } else
+	return FALSE;
+
+    return TRUE;
+}
+
 /* vim: set sw=4 ts=8 sts=4: */