nouveau: implement pipe_screen

Untested on NV3x/NV5x.  Quite possibly broken.

22 files changed, 595 insertions, 394 deletions

diff --git a/src/gallium/drivers/nouveau/nouveau_winsys.h b/src/gallium/drivers/nouveau/nouveau_winsys.h
index b5e470cfaa4..98d95e94a58 100644
--- a/src/gallium/drivers/nouveau/nouveau_winsys.h
+++ b/src/gallium/drivers/nouveau/nouveau_winsys.h
@@ -49,13 +49,22 @@ struct nouveau_winsys {
 			    unsigned, unsigned, unsigned, unsigned, unsigned);
 };
 
+extern struct pipe_screen *
+nv30_screen_create(struct pipe_winsys *ws, unsigned chipset);
+
 extern struct pipe_context *
-nv30_create(struct pipe_winsys *, struct nouveau_winsys *, unsigned chipset);
+nv30_create(struct pipe_screen *, struct nouveau_winsys *);
+
+extern struct pipe_screen *
+nv40_screen_create(struct pipe_winsys *ws, unsigned chipset);
 
 extern struct pipe_context *
-nv40_create(struct pipe_winsys *, struct nouveau_winsys *, unsigned chipset);
+nv40_create(struct pipe_screen *, struct nouveau_winsys *);
+
+extern struct pipe_screen *
+nv50_screen_create(struct pipe_winsys *ws, unsigned chipset);
 
 extern struct pipe_context *
-nv50_create(struct pipe_winsys *, struct nouveau_winsys *, unsigned chipset);
+nv50_create(struct pipe_screen *, struct nouveau_winsys *);
 
 #endif
diff --git a/src/gallium/drivers/nv30/Makefile b/src/gallium/drivers/nv30/Makefile
index b7c252fc986..3f80fb87c9b 100644
--- a/src/gallium/drivers/nv30/Makefile
+++ b/src/gallium/drivers/nv30/Makefile
@@ -11,6 +11,7 @@ DRIVER_SOURCES = \
 	nv30_fragtex.c \
 	nv30_miptree.c \
 	nv30_query.c \
+	nv30_screen.c \
 	nv30_state.c \
 	nv30_state_emit.c \
 	nv30_surface.c \
diff --git a/src/gallium/drivers/nv30/nv30_context.c b/src/gallium/drivers/nv30/nv30_context.c
index e9afeb80176..b8452e23b16 100644
--- a/src/gallium/drivers/nv30/nv30_context.c
+++ b/src/gallium/drivers/nv30/nv30_context.c
@@ -4,80 +4,7 @@
 #include "pipe/p_util.h"
 
 #include "nv30_context.h"
-
-static const char *
-nv30_get_name(struct pipe_context *pipe)
-{
-	struct nv30_context *nv30 = nv30_context(pipe);
-	static char buffer[128];
-
-	snprintf(buffer, sizeof(buffer), "NV%02X", nv30->chipset);
-	return buffer;
-}
-
-static const char *
-nv30_get_vendor(struct pipe_context *pipe)
-{
-	return "nouveau";
-}
-
-static int
-nv30_get_param(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
-		return 16;
-	case PIPE_CAP_NPOT_TEXTURES:
-		return 0;
-	case PIPE_CAP_TWO_SIDED_STENCIL:
-		return 1;
-	case PIPE_CAP_GLSL:
-		return 0;
-	case PIPE_CAP_S3TC:
-		return 0;
-	case PIPE_CAP_ANISOTROPIC_FILTER:
-		return 1;
-	case PIPE_CAP_POINT_SPRITE:
-		return 1;
-	case PIPE_CAP_MAX_RENDER_TARGETS:
-		return 2;
-	case PIPE_CAP_OCCLUSION_QUERY:
-		return 1;
-	case PIPE_CAP_TEXTURE_SHADOW_MAP:
-		return 1;
-	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
-		return 13;
-	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
-		return 10;
-	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
-		return 13;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0;
-	}
-}
-
-static float
-nv30_get_paramf(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_LINE_WIDTH:
-	case PIPE_CAP_MAX_LINE_WIDTH_AA:
-		return 10.0;
-	case PIPE_CAP_MAX_POINT_WIDTH:
-	case PIPE_CAP_MAX_POINT_WIDTH_AA:
-		return 64.0;
-	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
-		return 16.0;
-	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
-		return 4.0;
-	case PIPE_CAP_BITMAP_TEXCOORD_BIAS:
-		return 0.0;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0.0;
-	}
-}
+#include "nv30_screen.h"
 
 static void
 nv30_flush(struct pipe_context *pipe, unsigned flags)
@@ -338,9 +265,10 @@ nv30_init_hwctx(struct nv30_context *nv30, int rankine_class)
 #define NV35TCL_CHIPSET_3X_MASK 0x000001e0
 
 struct pipe_context *
-nv30_create(struct pipe_winsys *pipe_winsys, struct nouveau_winsys *nvws,
-	    unsigned chipset)
+nv30_create(struct pipe_screen *screen, struct nouveau_winsys *nvws)
 {
+	struct pipe_winsys *pipe_winsys = screen->winsys;
+	unsigned chipset = nv30_screen(screen)->chipset;
 	struct nv30_context *nv30;
 	int rankine_class = 0, ret;
 
@@ -404,12 +332,9 @@ nv30_create(struct pipe_winsys *pipe_winsys, struct nouveau_winsys *nvws,
 
 	/* Pipe context setup */
 	nv30->pipe.winsys = pipe_winsys;
+	nv30->pipe.screen = screen;
 
 	nv30->pipe.destroy = nv30_destroy;
-	nv30->pipe.get_name = nv30_get_name;
-	nv30->pipe.get_vendor = nv30_get_vendor;
-	nv30->pipe.get_param = nv30_get_param;
-	nv30->pipe.get_paramf = nv30_get_paramf;
 
 	nv30->pipe.draw_arrays = nv30_draw_arrays;
 	nv30->pipe.draw_elements = nv30_draw_elements;
@@ -420,7 +345,6 @@ nv30_create(struct pipe_winsys *pipe_winsys, struct nouveau_winsys *nvws,
 	nv30_init_query_functions(nv30);
 	nv30_init_surface_functions(nv30);
 	nv30_init_state_functions(nv30);
-	nv30_init_miptree_functions(nv30);
 
 	nv30->draw = draw_create();
 	assert(nv30->draw);
diff --git a/src/gallium/drivers/nv30/nv30_context.h b/src/gallium/drivers/nv30/nv30_context.h
index d6d16ee8686..c63847a087c 100644
--- a/src/gallium/drivers/nv30/nv30_context.h
+++ b/src/gallium/drivers/nv30/nv30_context.h
@@ -91,7 +91,7 @@ nv30_context(struct pipe_context *pipe)
 
 extern void nv30_init_state_functions(struct nv30_context *nv30);
 extern void nv30_init_surface_functions(struct nv30_context *nv30);
-extern void nv30_init_miptree_functions(struct nv30_context *nv30);
+extern void nv30_init_miptree_functions(struct pipe_screen *screen);
 extern void nv30_init_query_functions(struct nv30_context *nv30);
 
 /* nv30_draw.c */
diff --git a/src/gallium/drivers/nv30/nv30_miptree.c b/src/gallium/drivers/nv30/nv30_miptree.c
index 5fb89f4cfdc..23bcef08ebc 100644
--- a/src/gallium/drivers/nv30/nv30_miptree.c
+++ b/src/gallium/drivers/nv30/nv30_miptree.c
@@ -4,6 +4,7 @@
 #include "pipe/p_inlines.h"
 
 #include "nv30_context.h"
+#include "nv30_screen.h"
 
 static void
 nv30_miptree_layout(struct nv30_miptree *nv30mt)
@@ -54,9 +55,9 @@ nv30_miptree_layout(struct nv30_miptree *nv30mt)
 }
 
 static void
-nv30_miptree_create(struct pipe_context *pipe, struct pipe_texture **pt)
+nv30_miptree_create(struct pipe_screen *screen, struct pipe_texture **pt)
 {
-	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_winsys *ws = screen->winsys;
 	struct nv30_miptree *nv30mt;
 
 	nv30mt = realloc(*pt, sizeof(struct nv30_miptree));
@@ -77,9 +78,9 @@ nv30_miptree_create(struct pipe_context *pipe, struct pipe_texture **pt)
 }
 
 static void
-nv30_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
+nv30_miptree_release(struct pipe_screen *screen, struct pipe_texture **pt)
 {
-	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_winsys *ws = screen->winsys;
 	struct pipe_texture *mt = *pt;
 
 	*pt = NULL;
@@ -96,10 +97,42 @@ nv30_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
 	}
 }
 
+static struct pipe_surface *
+nv30_miptree_surface_get(struct pipe_screen *screen, struct pipe_texture *pt,
+			 unsigned face, unsigned level, unsigned zslice)
+{
+	struct pipe_winsys *ws = screen->winsys;
+	struct nv30_miptree *nv30mt = (struct nv30_miptree *)pt;
+	struct pipe_surface *ps;
+
+	ps = ws->surface_alloc(ws);
+	if (!ps)
+		return NULL;
+	pipe_buffer_reference(ws, &ps->buffer, nv30mt->buffer);
+	ps->format = pt->format;
+	ps->cpp = pt->cpp;
+	ps->width = pt->width[level];
+	ps->height = pt->height[level];
+	ps->pitch = nv30mt->level[level].pitch / ps->cpp;
+
+	if (pt->target == PIPE_TEXTURE_CUBE) {
+		ps->offset = nv30mt->level[level].image_offset[face];
+	} else
+	if (pt->target == PIPE_TEXTURE_3D) {
+		ps->offset = nv30mt->level[level].image_offset[zslice];
+	} else {
+		ps->offset = nv30mt->level[level].image_offset[0];
+	}
+
+	return ps;
+}
 void
-nv30_init_miptree_functions(struct nv30_context *nv30)
+nv30_init_miptree_functions(struct pipe_screen *screen)
 {
-	nv30->pipe.texture_create = nv30_miptree_create;
-	nv30->pipe.texture_release = nv30_miptree_release;
+	struct nv30_screen *nv30screen = nv30_screen(screen);
+
+	nv30screen->screen.texture_create = nv30_miptree_create;
+	nv30screen->screen.texture_release = nv30_miptree_release;
+	nv30screen->screen.get_tex_surface = nv30_miptree_surface_get;
 }
 
diff --git a/src/gallium/drivers/nv30/nv30_screen.c b/src/gallium/drivers/nv30/nv30_screen.c
new file mode 100644
index 00000000000..6d64025528f
--- /dev/null
+++ b/src/gallium/drivers/nv30/nv30_screen.c
@@ -0,0 +1,151 @@
+#include "pipe/p_screen.h"
+#include "pipe/p_util.h"
+
+#include "nv30_context.h"
+#include "nv30_screen.h"
+
+static const char *
+nv30_screen_get_name(struct pipe_screen *screen)
+{
+	struct nv30_screen *nv30screen = nv30_screen(screen);
+	static char buffer[128];
+
+	snprintf(buffer, sizeof(buffer), "NV%02X", nv30screen->chipset);
+	return buffer;
+}
+
+static const char *
+nv30_screen_get_vendor(struct pipe_screen *screen)
+{
+	return "nouveau";
+}
+
+static int
+nv30_screen_get_param(struct pipe_screen *screen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
+		return 16;
+	case PIPE_CAP_NPOT_TEXTURES:
+		return 0;
+	case PIPE_CAP_TWO_SIDED_STENCIL:
+		return 1;
+	case PIPE_CAP_GLSL:
+		return 0;
+	case PIPE_CAP_S3TC:
+		return 0;
+	case PIPE_CAP_ANISOTROPIC_FILTER:
+		return 1;
+	case PIPE_CAP_POINT_SPRITE:
+		return 1;
+	case PIPE_CAP_MAX_RENDER_TARGETS:
+		return 2;
+	case PIPE_CAP_OCCLUSION_QUERY:
+		return 1;
+	case PIPE_CAP_TEXTURE_SHADOW_MAP:
+		return 1;
+	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
+		return 13;
+	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
+		return 10;
+	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
+		return 13;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0;
+	}
+}
+
+static float
+nv30_screen_get_paramf(struct pipe_screen *screen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_LINE_WIDTH:
+	case PIPE_CAP_MAX_LINE_WIDTH_AA:
+		return 10.0;
+	case PIPE_CAP_MAX_POINT_WIDTH:
+	case PIPE_CAP_MAX_POINT_WIDTH_AA:
+		return 64.0;
+	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
+		return 16.0;
+	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
+		return 4.0;
+	case PIPE_CAP_BITMAP_TEXCOORD_BIAS:
+		return 0.0;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0.0;
+	}
+}
+
+static boolean
+nv30_screen_is_format_supported(struct pipe_screen *screen,
+				enum pipe_format format, uint type)
+{
+	switch (type) {
+	case PIPE_SURFACE:
+		switch (format) {
+		case PIPE_FORMAT_A8R8G8B8_UNORM:
+		case PIPE_FORMAT_R5G6B5_UNORM: 
+		case PIPE_FORMAT_Z24S8_UNORM:
+		case PIPE_FORMAT_Z16_UNORM:
+			return TRUE;
+		default:
+			break;
+		}
+		break;
+	case PIPE_TEXTURE:
+		switch (format) {
+		case PIPE_FORMAT_A8R8G8B8_UNORM:
+		case PIPE_FORMAT_A1R5G5B5_UNORM:
+		case PIPE_FORMAT_A4R4G4B4_UNORM:
+		case PIPE_FORMAT_R5G6B5_UNORM: 
+		case PIPE_FORMAT_U_L8:
+		case PIPE_FORMAT_U_A8:
+		case PIPE_FORMAT_U_I8:
+		case PIPE_FORMAT_U_A8_L8:
+		case PIPE_FORMAT_Z16_UNORM:
+		case PIPE_FORMAT_Z24S8_UNORM:
+			return TRUE;
+		default:
+			break;
+		}
+		break;
+	default:
+		assert(0);
+	};
+
+	return FALSE;
+}
+
+static void
+nv30_screen_destroy(struct pipe_screen *screen)
+{
+	FREE(screen);
+}
+
+struct pipe_screen *
+nv30_screen_create(struct pipe_winsys *winsys, unsigned chipset)
+{
+	struct nv30_screen *nv30screen = CALLOC_STRUCT(nv30_screen);
+
+	if (!nv30screen)
+		return NULL;
+
+	nv30screen->chipset = chipset;
+
+	nv30screen->screen.winsys = winsys;
+
+	nv30screen->screen.destroy = nv30_screen_destroy;
+
+	nv30screen->screen.get_name = nv30_screen_get_name;
+	nv30screen->screen.get_vendor = nv30_screen_get_vendor;
+	nv30screen->screen.get_param = nv30_screen_get_param;
+	nv30screen->screen.get_paramf = nv30_screen_get_paramf;
+	nv30screen->screen.is_format_supported = 
+		nv30_screen_is_format_supported;
+
+	nv30_init_miptree_functions(&nv30screen->screen);
+	return &nv30screen->screen;
+}
+
diff --git a/src/gallium/drivers/nv30/nv30_screen.h b/src/gallium/drivers/nv30/nv30_screen.h
new file mode 100644
index 00000000000..e55242fbf7f
--- /dev/null
+++ b/src/gallium/drivers/nv30/nv30_screen.h
@@ -0,0 +1,20 @@
+#ifndef __NV30_SCREEN_H__
+#define __NV30_SCREEN_H__
+
+#include "pipe/p_screen.h"
+
+struct nv30_screen {
+	struct pipe_screen screen;
+	unsigned chipset;
+};
+
+static INLINE struct nv30_screen *
+nv30_screen(struct pipe_screen *screen)
+{
+	return (struct nv30_screen *)screen;
+}
+
+extern struct pipe_screen *
+nv30_screen_create(struct pipe_winsys *winsys, unsigned chipset);
+
+#endif
diff --git a/src/gallium/drivers/nv30/nv30_surface.c b/src/gallium/drivers/nv30/nv30_surface.c
index 974965679f5..b20a3dd4c15 100644
--- a/src/gallium/drivers/nv30/nv30_surface.c
+++ b/src/gallium/drivers/nv30/nv30_surface.c
@@ -33,76 +33,6 @@
 #include "pipe/p_inlines.h"
 #include "util/p_tile.h"
 
-static boolean
-nv30_surface_format_supported(struct pipe_context *pipe,
-			      enum pipe_format format, uint type)
-{
-	switch (type) {
-	case PIPE_SURFACE:
-		switch (format) {
-		case PIPE_FORMAT_A8R8G8B8_UNORM:
-		case PIPE_FORMAT_R5G6B5_UNORM: 
-		case PIPE_FORMAT_Z24S8_UNORM:
-		case PIPE_FORMAT_Z16_UNORM:
-			return TRUE;
-		default:
-			break;
-		}
-		break;
-	case PIPE_TEXTURE:
-		switch (format) {
-		case PIPE_FORMAT_A8R8G8B8_UNORM:
-		case PIPE_FORMAT_A1R5G5B5_UNORM:
-		case PIPE_FORMAT_A4R4G4B4_UNORM:
-		case PIPE_FORMAT_R5G6B5_UNORM: 
-		case PIPE_FORMAT_U_L8:
-		case PIPE_FORMAT_U_A8:
-		case PIPE_FORMAT_U_I8:
-		case PIPE_FORMAT_U_A8_L8:
-		case PIPE_FORMAT_Z16_UNORM:
-		case PIPE_FORMAT_Z24S8_UNORM:
-			return TRUE;
-		default:
-			break;
-		}
-		break;
-	default:
-		assert(0);
-	};
-
-	return FALSE;
-}
-
-static struct pipe_surface *
-nv30_get_tex_surface(struct pipe_context *pipe, struct pipe_texture *pt,
-                     unsigned face, unsigned level, unsigned zslice)
-{
-	struct pipe_winsys *ws = pipe->winsys;
-	struct nv30_miptree *nv30mt = (struct nv30_miptree *)pt;
-	struct pipe_surface *ps;
-
-	ps = ws->surface_alloc(ws);
-	if (!ps)
-		return NULL;
-	pipe_buffer_reference(ws, &ps->buffer, nv30mt->buffer);
-	ps->format = pt->format;
-	ps->cpp = pt->cpp;
-	ps->width = pt->width[level];
-	ps->height = pt->height[level];
-	ps->pitch = nv30mt->level[level].pitch / ps->cpp;
-
-	if (pt->target == PIPE_TEXTURE_CUBE) {
-		ps->offset = nv30mt->level[level].image_offset[face];
-	} else
-	if (pt->target == PIPE_TEXTURE_3D) {
-		ps->offset = nv30mt->level[level].image_offset[zslice];
-	} else {
-		ps->offset = nv30mt->level[level].image_offset[0];
-	}
-
-	return ps;
-}
-
 static void
 nv30_surface_copy(struct pipe_context *pipe, unsigned do_flip,
 		  struct pipe_surface *dest, unsigned destx, unsigned desty,
@@ -130,8 +60,6 @@ nv30_surface_fill(struct pipe_context *pipe, struct pipe_surface *dest,
 void
 nv30_init_surface_functions(struct nv30_context *nv30)
 {
-	nv30->pipe.is_format_supported = nv30_surface_format_supported;
-	nv30->pipe.get_tex_surface = nv30_get_tex_surface;
 	nv30->pipe.surface_copy = nv30_surface_copy;
 	nv30->pipe.surface_fill = nv30_surface_fill;
 }
diff --git a/src/gallium/drivers/nv40/Makefile b/src/gallium/drivers/nv40/Makefile
index fd002b54e78..3369a21574f 100644
--- a/src/gallium/drivers/nv40/Makefile
+++ b/src/gallium/drivers/nv40/Makefile
@@ -11,6 +11,7 @@ DRIVER_SOURCES = \
 	nv40_fragtex.c \
 	nv40_miptree.c \
 	nv40_query.c \
+	nv40_screen.c \
 	nv40_state.c \
 	nv40_state_blend.c \
 	nv40_state_clip.c \
diff --git a/src/gallium/drivers/nv40/nv40_context.c b/src/gallium/drivers/nv40/nv40_context.c
index 8b5cc693de0..a7f64c6e9e5 100644
--- a/src/gallium/drivers/nv40/nv40_context.c
+++ b/src/gallium/drivers/nv40/nv40_context.c
@@ -4,85 +4,12 @@
 #include "pipe/p_util.h"
 
 #include "nv40_context.h"
+#include "nv40_screen.h"
 
 #define NV4X_GRCLASS4097_CHIPSETS 0x00000baf
 #define NV4X_GRCLASS4497_CHIPSETS 0x00005450
 #define NV6X_GRCLASS4497_CHIPSETS 0x00000088
 
-static const char *
-nv40_get_name(struct pipe_context *pipe)
-{
-	struct nv40_context *nv40 = nv40_context(pipe);
-	static char buffer[128];
-
-	snprintf(buffer, sizeof(buffer), "NV%02X", nv40->chipset);
-	return buffer;
-}
-
-static const char *
-nv40_get_vendor(struct pipe_context *pipe)
-{
-	return "nouveau";
-}
-
-static int
-nv40_get_param(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
-		return 16;
-	case PIPE_CAP_NPOT_TEXTURES:
-		return 1;
-	case PIPE_CAP_TWO_SIDED_STENCIL:
-		return 1;
-	case PIPE_CAP_GLSL:
-		return 0;
-	case PIPE_CAP_S3TC:
-		return 0;
-	case PIPE_CAP_ANISOTROPIC_FILTER:
-		return 1;
-	case PIPE_CAP_POINT_SPRITE:
-		return 1;
-	case PIPE_CAP_MAX_RENDER_TARGETS:
-		return 4;
-	case PIPE_CAP_OCCLUSION_QUERY:
-		return 1;
-	case PIPE_CAP_TEXTURE_SHADOW_MAP:
-		return 1;
-	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
-		return 13;
-	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
-		return 10;
-	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
-		return 13;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0;
-	}
-}
-
-static float
-nv40_get_paramf(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_LINE_WIDTH:
-	case PIPE_CAP_MAX_LINE_WIDTH_AA:
-		return 10.0;
-	case PIPE_CAP_MAX_POINT_WIDTH:
-	case PIPE_CAP_MAX_POINT_WIDTH_AA:
-		return 64.0;
-	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
-		return 16.0;
-	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
-		return 16.0;
-	case PIPE_CAP_BITMAP_TEXCOORD_BIAS:
-		return 0.0;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0.0;
-	}
-}
-
 static void
 nv40_flush(struct pipe_context *pipe, unsigned flags)
 {
@@ -269,10 +196,11 @@ nv40_destroy(struct pipe_context *pipe)
 }
 
 struct pipe_context *
-nv40_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws,
-	    unsigned chipset)
+nv40_create(struct pipe_screen *pscreen, struct nouveau_winsys *nvws)
 {
+	struct pipe_winsys *ws = pscreen->winsys;
 	struct nv40_context *nv40;
+	unsigned chipset = nv40_screen(pscreen)->chipset;
 
 	nv40 = CALLOC(1, sizeof(struct nv40_context));
 	if (!nv40)
@@ -288,11 +216,8 @@ nv40_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws,
 	nv40->nvws = nvws;
 
 	nv40->pipe.winsys = ws;
+	nv40->pipe.screen = pscreen;
 	nv40->pipe.destroy = nv40_destroy;
-	nv40->pipe.get_name = nv40_get_name;
-	nv40->pipe.get_vendor = nv40_get_vendor;
-	nv40->pipe.get_param = nv40_get_param;
-	nv40->pipe.get_paramf = nv40_get_paramf;
 	nv40->pipe.draw_arrays = nv40_draw_arrays;
 	nv40->pipe.draw_elements = nv40_draw_elements;
 	nv40->pipe.clear = nv40_clear;
diff --git a/src/gallium/drivers/nv40/nv40_context.h b/src/gallium/drivers/nv40/nv40_context.h
index 16cc053ad9f..3ddfbd43f60 100644
--- a/src/gallium/drivers/nv40/nv40_context.h
+++ b/src/gallium/drivers/nv40/nv40_context.h
@@ -178,6 +178,8 @@ extern void nv40_init_surface_functions(struct nv40_context *nv40);
 extern void nv40_init_miptree_functions(struct nv40_context *nv40);
 extern void nv40_init_query_functions(struct nv40_context *nv40);
 
+extern void nv40_screen_init_miptree_functions(struct pipe_screen *pscreen);
+
 /* nv40_draw.c */
 extern struct draw_stage *nv40_draw_render_stage(struct nv40_context *nv40);
 
diff --git a/src/gallium/drivers/nv40/nv40_miptree.c b/src/gallium/drivers/nv40/nv40_miptree.c
index 5e1c7ade31b..94ba05b7104 100644
--- a/src/gallium/drivers/nv40/nv40_miptree.c
+++ b/src/gallium/drivers/nv40/nv40_miptree.c
@@ -54,9 +54,9 @@ nv40_miptree_layout(struct nv40_miptree *nv40mt)
 }
 
 static struct pipe_texture *
-nv40_miptree_create(struct pipe_context *pipe, const struct pipe_texture *pt)
+nv40_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
 {
-	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_winsys *ws = pscreen->winsys;
 	struct nv40_miptree *mt;
 
 	mt = MALLOC(sizeof(struct nv40_miptree));
@@ -64,6 +64,8 @@ nv40_miptree_create(struct pipe_context *pipe, const struct pipe_texture *pt)
 		return NULL;
 	mt->base = *pt;
 	mt->base.refcount = 1;
+	mt->base.screen = pscreen;
+
 	nv40_miptree_layout(mt);
 
 	mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
@@ -77,9 +79,9 @@ nv40_miptree_create(struct pipe_context *pipe, const struct pipe_texture *pt)
 }
 
 static void
-nv40_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
+nv40_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **pt)
 {
-	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_winsys *ws = pscreen->winsys;
 	struct pipe_texture *mt = *pt;
 
 	*pt = NULL;
@@ -102,10 +104,10 @@ nv40_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt)
 }
 
 static struct pipe_surface *
-nv40_miptree_surface(struct pipe_context *pipe, struct pipe_texture *pt,
+nv40_miptree_surface(struct pipe_screen *pscreen, struct pipe_texture *pt,
                      unsigned face, unsigned level, unsigned zslice)
 {
-	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_winsys *ws = pscreen->winsys;
 	struct nv40_miptree *nv40mt = (struct nv40_miptree *)pt;
 	struct pipe_surface *ps;
 
@@ -134,9 +136,14 @@ nv40_miptree_surface(struct pipe_context *pipe, struct pipe_texture *pt,
 void
 nv40_init_miptree_functions(struct nv40_context *nv40)
 {
-	nv40->pipe.texture_create = nv40_miptree_create;
-	nv40->pipe.texture_release = nv40_miptree_release;
 	nv40->pipe.texture_update = nv40_miptree_update;
-	nv40->pipe.get_tex_surface = nv40_miptree_surface;
+}
+
+void
+nv40_screen_init_miptree_functions(struct pipe_screen *pscreen)
+{
+	pscreen->texture_create = nv40_miptree_create;
+	pscreen->texture_release = nv40_miptree_release;
+	pscreen->get_tex_surface = nv40_miptree_surface;
 }
 
diff --git a/src/gallium/drivers/nv40/nv40_screen.c b/src/gallium/drivers/nv40/nv40_screen.c
new file mode 100644
index 00000000000..1941598c641
--- /dev/null
+++ b/src/gallium/drivers/nv40/nv40_screen.c
@@ -0,0 +1,151 @@
+#include "pipe/p_screen.h"
+#include "pipe/p_util.h"
+
+#include "nv40_context.h"
+#include "nv40_screen.h"
+
+static const char *
+nv40_screen_get_name(struct pipe_screen *pscreen)
+{
+	struct nv40_screen *screen = nv40_screen(pscreen);
+	static char buffer[128];
+
+	snprintf(buffer, sizeof(buffer), "NV%02X", screen->chipset);
+	return buffer;
+}
+
+static const char *
+nv40_screen_get_vendor(struct pipe_screen *pscreen)
+{
+	return "nouveau";
+}
+
+static int
+nv40_screen_get_param(struct pipe_screen *pscreen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
+		return 16;
+	case PIPE_CAP_NPOT_TEXTURES:
+		return 1;
+	case PIPE_CAP_TWO_SIDED_STENCIL:
+		return 1;
+	case PIPE_CAP_GLSL:
+		return 0;
+	case PIPE_CAP_S3TC:
+		return 0;
+	case PIPE_CAP_ANISOTROPIC_FILTER:
+		return 1;
+	case PIPE_CAP_POINT_SPRITE:
+		return 1;
+	case PIPE_CAP_MAX_RENDER_TARGETS:
+		return 4;
+	case PIPE_CAP_OCCLUSION_QUERY:
+		return 1;
+	case PIPE_CAP_TEXTURE_SHADOW_MAP:
+		return 1;
+	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
+		return 13;
+	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
+		return 10;
+	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
+		return 13;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0;
+	}
+}
+
+static float
+nv40_screen_get_paramf(struct pipe_screen *pscreen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_LINE_WIDTH:
+	case PIPE_CAP_MAX_LINE_WIDTH_AA:
+		return 10.0;
+	case PIPE_CAP_MAX_POINT_WIDTH:
+	case PIPE_CAP_MAX_POINT_WIDTH_AA:
+		return 64.0;
+	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
+		return 16.0;
+	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
+		return 16.0;
+	case PIPE_CAP_BITMAP_TEXCOORD_BIAS:
+		return 0.0;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0.0;
+	}
+}
+
+static boolean
+nv40_screen_surface_format_supported(struct pipe_screen *pscreen,
+				     enum pipe_format format, uint type)
+{
+	switch (type) {
+	case PIPE_SURFACE:
+		switch (format) {
+		case PIPE_FORMAT_A8R8G8B8_UNORM:
+		case PIPE_FORMAT_R5G6B5_UNORM: 
+		case PIPE_FORMAT_Z24S8_UNORM:
+		case PIPE_FORMAT_Z16_UNORM:
+			return TRUE;
+		default:
+			break;
+		}
+		break;
+	case PIPE_TEXTURE:
+		switch (format) {
+		case PIPE_FORMAT_A8R8G8B8_UNORM:
+		case PIPE_FORMAT_A1R5G5B5_UNORM:
+		case PIPE_FORMAT_A4R4G4B4_UNORM:
+		case PIPE_FORMAT_R5G6B5_UNORM: 
+		case PIPE_FORMAT_U_L8:
+		case PIPE_FORMAT_U_A8:
+		case PIPE_FORMAT_U_I8:
+		case PIPE_FORMAT_U_A8_L8:
+		case PIPE_FORMAT_Z16_UNORM:
+		case PIPE_FORMAT_Z24S8_UNORM:
+			return TRUE;
+		default:
+			break;
+		}
+		break;
+	default:
+		assert(0);
+	};
+
+	return FALSE;
+}
+
+static void
+nv40_screen_destroy(struct pipe_screen *pscreen)
+{
+	FREE(pscreen);
+}
+
+struct pipe_screen *
+nv40_screen_create(struct pipe_winsys *ws, unsigned chipset)
+{
+	struct nv40_screen *screen = CALLOC_STRUCT(nv40_screen);
+
+	if (!screen)
+		return NULL;
+
+	screen->chipset = chipset;
+
+	screen->pipe.winsys = ws;
+	screen->pipe.destroy = nv40_screen_destroy;
+
+	screen->pipe.get_name = nv40_screen_get_name;
+	screen->pipe.get_vendor = nv40_screen_get_vendor;
+	screen->pipe.get_param = nv40_screen_get_param;
+	screen->pipe.get_paramf = nv40_screen_get_paramf;
+
+	screen->pipe.is_format_supported = nv40_screen_surface_format_supported;
+
+	nv40_screen_init_miptree_functions(&screen->pipe);
+
+	return &screen->pipe;
+}
+
diff --git a/src/gallium/drivers/nv40/nv40_screen.h b/src/gallium/drivers/nv40/nv40_screen.h
new file mode 100644
index 00000000000..b30a6c5ad57
--- /dev/null
+++ b/src/gallium/drivers/nv40/nv40_screen.h
@@ -0,0 +1,20 @@
+#ifndef __NV40_SCREEN_H__
+#define __NV40_SCREEN_H__
+
+#include "pipe/p_screen.h"
+
+struct nv40_screen {
+	struct pipe_screen pipe;
+	unsigned chipset;
+};
+
+static INLINE struct nv40_screen *
+nv40_screen(struct pipe_screen *screen)
+{
+	return (struct nv40_screen *)screen;
+}
+
+extern struct pipe_screen *
+nv40_screen_create(struct pipe_winsys *winsys, unsigned chipset);
+
+#endif
diff --git a/src/gallium/drivers/nv40/nv40_surface.c b/src/gallium/drivers/nv40/nv40_surface.c
index df5d7abdbfc..e8a60116964 100644
--- a/src/gallium/drivers/nv40/nv40_surface.c
+++ b/src/gallium/drivers/nv40/nv40_surface.c
@@ -33,46 +33,6 @@
 #include "pipe/p_inlines.h"
 #include "util/p_tile.h"
 
-static boolean
-nv40_surface_format_supported(struct pipe_context *pipe,
-			      enum pipe_format format, uint type)
-{
-	switch (type) {
-	case PIPE_SURFACE:
-		switch (format) {
-		case PIPE_FORMAT_A8R8G8B8_UNORM:
-		case PIPE_FORMAT_R5G6B5_UNORM: 
-		case PIPE_FORMAT_Z24S8_UNORM:
-		case PIPE_FORMAT_Z16_UNORM:
-			return TRUE;
-		default:
-			break;
-		}
-		break;
-	case PIPE_TEXTURE:
-		switch (format) {
-		case PIPE_FORMAT_A8R8G8B8_UNORM:
-		case PIPE_FORMAT_A1R5G5B5_UNORM:
-		case PIPE_FORMAT_A4R4G4B4_UNORM:
-		case PIPE_FORMAT_R5G6B5_UNORM: 
-		case PIPE_FORMAT_U_L8:
-		case PIPE_FORMAT_U_A8:
-		case PIPE_FORMAT_U_I8:
-		case PIPE_FORMAT_U_A8_L8:
-		case PIPE_FORMAT_Z16_UNORM:
-		case PIPE_FORMAT_Z24S8_UNORM:
-			return TRUE;
-		default:
-			break;
-		}
-		break;
-	default:
-		assert(0);
-	};
-
-	return FALSE;
-}
-
 static void
 nv40_surface_copy(struct pipe_context *pipe, unsigned do_flip,
 		  struct pipe_surface *dest, unsigned destx, unsigned desty,
@@ -100,7 +60,6 @@ nv40_surface_fill(struct pipe_context *pipe, struct pipe_surface *dest,
 void
 nv40_init_surface_functions(struct nv40_context *nv40)
 {
-	nv40->pipe.is_format_supported = nv40_surface_format_supported;
 	nv40->pipe.surface_copy = nv40_surface_copy;
 	nv40->pipe.surface_fill = nv40_surface_fill;
 }
diff --git a/src/gallium/drivers/nv50/Makefile b/src/gallium/drivers/nv50/Makefile
index 68eb49ff2a3..1c0b82887a1 100644
--- a/src/gallium/drivers/nv50/Makefile
+++ b/src/gallium/drivers/nv50/Makefile
@@ -9,6 +9,7 @@ DRIVER_SOURCES = \
 	nv50_draw.c \
 	nv50_miptree.c \
 	nv50_query.c \
+	nv50_screen.c \
 	nv50_state.c \
 	nv50_surface.c \
 	nv50_vbo.c
diff --git a/src/gallium/drivers/nv50/nv50_context.c b/src/gallium/drivers/nv50/nv50_context.c
index 3c5a54bfd38..98022809a6c 100644
--- a/src/gallium/drivers/nv50/nv50_context.c
+++ b/src/gallium/drivers/nv50/nv50_context.c
@@ -4,85 +4,7 @@
 #include "pipe/p_util.h"
 
 #include "nv50_context.h"
-
-static boolean
-nv50_is_format_supported(struct pipe_context *pipe, enum pipe_format format,
-			 uint type)
-{
-	return FALSE;
-}
-
-static const char *
-nv50_get_name(struct pipe_context *pipe)
-{
-	struct nv50_context *nv50 = (struct nv50_context *)pipe;
-	static char buffer[128];
-
-	snprintf(buffer, sizeof(buffer), "NV%02X", nv50->chipset);
-	return buffer;
-}
-
-static const char *
-nv50_get_vendor(struct pipe_context *pipe)
-{
-	return "nouveau";
-}
-
-static int
-nv50_get_param(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
-		return 32;
-	case PIPE_CAP_NPOT_TEXTURES:
-		return 0;
-	case PIPE_CAP_TWO_SIDED_STENCIL:
-		return 1;
-	case PIPE_CAP_GLSL:
-		return 0;
-	case PIPE_CAP_S3TC:
-		return 0;
-	case PIPE_CAP_ANISOTROPIC_FILTER:
-		return 0;
-	case PIPE_CAP_POINT_SPRITE:
-		return 0;
-	case PIPE_CAP_MAX_RENDER_TARGETS:
-		return 8;
-	case PIPE_CAP_OCCLUSION_QUERY:
-		return 0;
-	case PIPE_CAP_TEXTURE_SHADOW_MAP:
-		return 0;
-	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
-		return 13;
-	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
-		return 10;
-	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
-		return 13;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0;
-	}
-}
-
-static float
-nv50_get_paramf(struct pipe_context *pipe, int param)
-{
-	switch (param) {
-	case PIPE_CAP_MAX_LINE_WIDTH:
-	case PIPE_CAP_MAX_LINE_WIDTH_AA:
-		return 10.0;
-	case PIPE_CAP_MAX_POINT_WIDTH:
-	case PIPE_CAP_MAX_POINT_WIDTH_AA:
-		return 64.0;
-	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
-		return 16.0;
-	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
-		return 4.0;
-	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
-		return 0.0;
-	}
-}
+#include "nv50_screen.h"
 
 static void
 nv50_flush(struct pipe_context *pipe, unsigned flags)
@@ -134,9 +56,10 @@ nv50_init_hwctx(struct nv50_context *nv50, int tesla_class)
 #define GRCLASS5097_CHIPSETS 0x00000000
 #define GRCLASS8297_CHIPSETS 0x00000010
 struct pipe_context *
-nv50_create(struct pipe_winsys *pipe_winsys, struct nouveau_winsys *nvws,
-	    unsigned chipset)
+nv50_create(struct pipe_screen *pscreen, struct nouveau_winsys *nvws)
 {
+	struct pipe_winsys *pipe_winsys = pscreen->winsys;
+	unsigned chipset = nv50_screen(pscreen)->chipset;
 	struct nv50_context *nv50;
 	int tesla_class, ret;
 
@@ -173,13 +96,9 @@ nv50_create(struct pipe_winsys *pipe_winsys, struct nouveau_winsys *nvws,
 	}
 
 	nv50->pipe.winsys = pipe_winsys;
+	nv50->pipe.screen = pscreen;
 
 	nv50->pipe.destroy = nv50_destroy;
-	nv50->pipe.is_format_supported = nv50_is_format_supported;
-	nv50->pipe.get_name = nv50_get_name;
-	nv50->pipe.get_vendor = nv50_get_vendor;
-	nv50->pipe.get_param = nv50_get_param;
-	nv50->pipe.get_paramf = nv50_get_paramf;
 
 	nv50->pipe.draw_arrays = nv50_draw_arrays;
 	nv50->pipe.draw_elements = nv50_draw_elements;
diff --git a/src/gallium/drivers/nv50/nv50_context.h b/src/gallium/drivers/nv50/nv50_context.h
index b99254f6191..a529bf3c3e3 100644
--- a/src/gallium/drivers/nv50/nv50_context.h
+++ b/src/gallium/drivers/nv50/nv50_context.h
@@ -38,6 +38,8 @@ extern void nv50_init_surface_functions(struct nv50_context *nv50);
 extern void nv50_init_state_functions(struct nv50_context *nv50);
 extern void nv50_init_query_functions(struct nv50_context *nv50);
 
+extern void nv50_screen_init_miptree_functions(struct pipe_screen *pscreen);
+
 /* nv50_draw.c */
 extern struct draw_stage *nv50_draw_render_stage(struct nv50_context *nv50);
 
diff --git a/src/gallium/drivers/nv50/nv50_miptree.c b/src/gallium/drivers/nv50/nv50_miptree.c
index 0c034ed4387..720d33fda91 100644
--- a/src/gallium/drivers/nv50/nv50_miptree.c
+++ b/src/gallium/drivers/nv50/nv50_miptree.c
@@ -1,25 +1,46 @@
 #include "pipe/p_state.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_util.h"
+#include "pipe/p_screen.h"
 
 #include "nv50_context.h"
 
 static struct pipe_texture *
-nv50_miptree_create(struct pipe_context *pipe, const struct pipe_texture *pt)
+nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
 {
 	NOUVEAU_ERR("unimplemented\n");
 	return NULL;
 }
 
 static void
-nv50_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
+nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **pt)
 {
 	NOUVEAU_ERR("unimplemented\n");
 }
 
+static struct pipe_surface *
+nv50_miptree_surface(struct pipe_screen *pscreen, struct pipe_texture *pt,
+		     unsigned face, unsigned level, unsigned zslice)
+{
+	NOUVEAU_ERR("unimplemented\n");
+	return NULL;
+}
+
+void
+nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
+{
+	pscreen->texture_create = nv50_miptree_create;
+	pscreen->texture_release = nv50_miptree_release;
+	pscreen->get_tex_surface = nv50_miptree_surface;
+}
+
+static void
+nv50_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt)
+{
+}
+
 void
 nv50_init_miptree_functions(struct nv50_context *nv50)
 {
-	nv50->pipe.texture_create = nv50_miptree_create;
-	nv50->pipe.texture_release = nv50_miptree_release;
+	nv50->pipe.texture_update = nv50_miptree_update;
 }
diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
new file mode 100644
index 00000000000..8bf82eb0bc0
--- /dev/null
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -0,0 +1,117 @@
+#include "pipe/p_screen.h"
+#include "pipe/p_util.h"
+
+#include "nv50_context.h"
+#include "nv50_screen.h"
+
+static boolean
+nv50_screen_is_format_supported(struct pipe_screen *pscreen,
+				enum pipe_format format, uint type)
+{
+	return FALSE;
+}
+
+static const char *
+nv50_screen_get_name(struct pipe_screen *pscreen)
+{
+	struct nv50_screen *screen = nv50_screen(pscreen);
+	static char buffer[128];
+
+	snprintf(buffer, sizeof(buffer), "NV%02X", screen->chipset);
+	return buffer;
+}
+
+static const char *
+nv50_screen_get_vendor(struct pipe_screen *pscreen)
+{
+	return "nouveau";
+}
+
+static int
+nv50_screen_get_param(struct pipe_screen *pscreen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
+		return 32;
+	case PIPE_CAP_NPOT_TEXTURES:
+		return 0;
+	case PIPE_CAP_TWO_SIDED_STENCIL:
+		return 1;
+	case PIPE_CAP_GLSL:
+		return 0;
+	case PIPE_CAP_S3TC:
+		return 0;
+	case PIPE_CAP_ANISOTROPIC_FILTER:
+		return 0;
+	case PIPE_CAP_POINT_SPRITE:
+		return 0;
+	case PIPE_CAP_MAX_RENDER_TARGETS:
+		return 8;
+	case PIPE_CAP_OCCLUSION_QUERY:
+		return 0;
+	case PIPE_CAP_TEXTURE_SHADOW_MAP:
+		return 0;
+	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
+		return 13;
+	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
+		return 10;
+	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
+		return 13;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0;
+	}
+}
+
+static float
+nv50_screen_get_paramf(struct pipe_screen *pscreen, int param)
+{
+	switch (param) {
+	case PIPE_CAP_MAX_LINE_WIDTH:
+	case PIPE_CAP_MAX_LINE_WIDTH_AA:
+		return 10.0;
+	case PIPE_CAP_MAX_POINT_WIDTH:
+	case PIPE_CAP_MAX_POINT_WIDTH_AA:
+		return 64.0;
+	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
+		return 16.0;
+	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
+		return 4.0;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0.0;
+	}
+}
+
+static void
+nv50_screen_destroy(struct pipe_screen *pscreen)
+{
+	FREE(pscreen);
+}
+
+struct pipe_screen *
+nv50_screen_create(struct pipe_winsys *ws, unsigned chipset)
+{
+	struct nv50_screen *screen = CALLOC_STRUCT(nv50_screen);
+
+	if (!screen)
+		return NULL;
+
+	screen->chipset = chipset;
+
+	screen->pipe.winsys = ws;
+
+	screen->pipe.destroy = nv50_screen_destroy;
+
+	screen->pipe.get_name = nv50_screen_get_name;
+	screen->pipe.get_vendor = nv50_screen_get_vendor;
+	screen->pipe.get_param = nv50_screen_get_param;
+	screen->pipe.get_paramf = nv50_screen_get_paramf;
+
+	screen->pipe.is_format_supported = nv50_screen_is_format_supported;
+
+	nv50_screen_init_miptree_functions(&screen->pipe);
+
+	return &screen->pipe;
+}
+
diff --git a/src/gallium/drivers/nv50/nv50_screen.h b/src/gallium/drivers/nv50/nv50_screen.h
new file mode 100644
index 00000000000..45ebbb8051b
--- /dev/null
+++ b/src/gallium/drivers/nv50/nv50_screen.h
@@ -0,0 +1,20 @@
+#ifndef __NV50_SCREEN_H__
+#define __NV50_SCREEN_H__
+
+#include "pipe/p_screen.h"
+
+struct nv50_screen {
+	struct pipe_screen pipe;
+	unsigned chipset;
+};
+
+static INLINE struct nv50_screen *
+nv50_screen(struct pipe_screen *screen)
+{
+	return (struct nv50_screen *)screen;
+}
+
+extern struct pipe_screen *
+nv50_screen_create(struct pipe_winsys *winsys, unsigned chipset);
+
+#endif
diff --git a/src/gallium/drivers/nv50/nv50_surface.c b/src/gallium/drivers/nv50/nv50_surface.c
index ca92ff02b89..39cf675a57c 100644
--- a/src/gallium/drivers/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nv50/nv50_surface.c
@@ -33,15 +33,6 @@
 #include "pipe/p_inlines.h"
 #include "util/p_tile.h"
 
-static struct pipe_surface *
-nv50_get_tex_surface(struct pipe_context *pipe,
-                     struct pipe_texture *pt,
-                     unsigned face, unsigned level, unsigned zslice)
-{
-	NOUVEAU_ERR("unimplemented\n");
-	return NULL;
-}
-
 static void
 nv50_surface_copy(struct pipe_context *pipe, unsigned flip,
 		  struct pipe_surface *dest, unsigned destx, unsigned desty,
@@ -69,7 +60,6 @@ nv50_surface_fill(struct pipe_context *pipe, struct pipe_surface *dest,
 void
 nv50_init_surface_functions(struct nv50_context *nv50)
 {
-   nv50->pipe.get_tex_surface = nv50_get_tex_surface;
    nv50->pipe.surface_copy = nv50_surface_copy;
    nv50->pipe.surface_fill = nv50_surface_fill;
 }