gallium: squash-merge of gallium screen context

Squashed commit of the following:

commit 009598122adf5cad42bf9af067eccaf8e89e1233
Author: Christoph Bumiller <[email protected]>
Date:   Mon Feb 8 11:03:26 2010 +0000

    nouveau: fix gallium-screen-context branch fallout

commit 7b2ffc2019d72e833afea7eebf3e80121187375d
Merge: 51e190e c036d13
Author: Keith Whitwell <[email protected]>
Date:   Fri Feb 5 09:55:02 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

    Conflicts:
    	src/gallium/winsys/drm/nouveau/drm/nouveau_drm_api.c

    This branch has got a pretty tortured history now, I expect
    a squash merge will be appropriate when it is done.

commit 51e190e95acf120f72768fafb29e9721e358df1b
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 17:58:02 2010 +0000

    gallium: fix some build issues

commit f524bdaa723fb181637ad30c6ad708aeedabe25b
Merge: f906212 3aba0a2
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 17:51:32 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

commit f9062126883199eabf045714c717cd35f4b7b313
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 17:17:12 2010 +0000

    gallium/docs: small description of screen::create_context

commit efcb37bd3d5ed37f06c6105bd2d750b374ec0927
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:42:42 2010 +0000

    drm/radeon: more dead create_context wrapper removal

commit 6badc0dd9e06cf2ec936940bcf12b9ef5324b301
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:42:30 2010 +0000

    drm/i965: more dead create_context wrapper removal

commit cf04ebd5a54b18b2d894cfdab2b0f2fd55626ffc
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:42:05 2010 +0000

    st/python: more dead create_context wrapper removal

commit 444f114c3516abf71c430e6e9d0d2ae3b80679d3
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:37:58 2010 +0000

    idenity: wrapped context creation

commit 5a6d09cb9e468d1ee6c8d54b887618819d8d94f2
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:28:47 2010 +0000

    ws/gdi: remove dead context_create wrapper

commit 132b55f4bec39386ac625f09aaa11f609664024c
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:27:52 2010 +0000

    ws/gdi: remove dead context_create wrapper

commit 56d2d21a0cdcb197a364049d354c2f15a4fc026a
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:25:38 2010 +0000

    st/xorg: use screen::context_create

commit 838c5cfe56b2af6c644909bed3c5e7cdd64c336a
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:23:20 2010 +0000

    glx/xlib: simplify creation of trace-wrapped contexts

    Trace screen knows how to properly wrap context creation in the
    wrapped screen, so nothing special to do here.

commit c99404c03ebaec4175f08a2f363e43c9085f2635
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:18:24 2010 +0000

    st/python: no need to special case context creation for trace

commit 193a527a682b6877bb1faecd8092df4dfd055a18
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:15:30 2010 +0000

    drm/radeon: remove dead create_context declaration

commit bb984eecc25cf23bc77e1c818b81165ba1a07c9a
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:14:58 2010 +0000

    nv/drm: remove dead create_context ref

commit e809313a44287dc4e16c28e9e74ef3b2b5271aa1
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:12:51 2010 +0000

    st/egl: remove a layer of wrappers around screen::create_context

commit 39caa6672a04122f185c22e17aab86d1c40938bf
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:05:28 2010 +0000

    r300g: fill in screen::context_create

commit 407f12556d16ba0656774d8a1d9ebda22f82f473
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 16:04:04 2010 +0000

    cell: adapt for screen::create_context, untested

commit d02b0c6ce321a04c76fdabb09e0e4380ce1c1376
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:50:24 2010 +0000

    drm/nv: adapt for screen::create_context

    All contexts now created directly through the screen, so remove
    equivalent code here.

    Remove apparently un-needed array of contexts in the winsys.

commit 53eec5b1349aa1b6892a75a7bff7e7530957aeae
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:50:08 2010 +0000

    stw: adapt for screen::create_context, untested

commit c6a64de3eb381bc9a88e9fbdecbf87d77925aaf5
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:49:20 2010 +0000

    trace: expose the wrapped context's priv data

    If we are going to keep this priv idea, really want an accessor
    function for it so that trace and other drivers can wrap that.

commit 75d6104e11d86ec2b0749627ed58e35f856ee6eb
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:47:55 2010 +0000

    nv30: adapt to screen::context_create

commit 12f5deb6ed9723e9b5d34577052b8365813ca14e
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:44:47 2010 +0000

    nv40: adapt to screen::context_create

commit 14baccaa3b6bbb3b91056126f6521828e786dc62
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:35:27 2010 +0000

    nv50: adapt to screen::create_context

    Not build tested.  Need to figure out how to build nouveau.

commit a0e94505ccd2d7f3e604465a2ac302f1286b73b6
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:22:27 2010 +0000

    llvmpipe: update for screen::create_context, untested

commit 0eae17107c950346030e4f7e0ec232f868d3893d
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 15:16:57 2010 +0000

    xlib/llvmpipe: remove dead winsys context creation path

commit 2f69f9ffaa7e2a01d2483277246ed13051ae4ca3
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 14:58:27 2010 +0000

    gallium: convert most code to use screen::create_context

    I wish I could build all of gallium at once to find breakages.

commit d7b57f4061b82322cbcae176125913d9f0dea6c1
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 12:46:21 2010 +0000

    glx: permit building with older protocol headers

    I'd like to be able to build mesa on current distro releases without
    having to upgrade from the standard dri2proto and glproto headers.  With
    this change I'm able to build on ancient releases such as Ubuntu 9-10...

    In general, it would be nice to be able to build-test mesa to check for
    unintended breakages without having to follow the external dependencies
    of every group working on the codebase.

commit 57adedd6fb06c98572ed8d4aef19203df4c4eea2
Merge: da71847 e1906ae
Author: Keith Whitwell <[email protected]>
Date:   Thu Feb 4 11:38:15 2010 +0000

    Merge commit 'origin/master' into gallium-screen-context

    Conflicts:
    	src/gallium/drivers/softpipe/sp_video_context.h
    	src/gallium/drivers/trace/tr_context.c
    	src/gallium/state_trackers/wgl/shared/stw_context.c
    	src/gallium/winsys/gdi/gdi_softpipe_winsys.c

commit da71847ea6414d7e352c6094f8963bb4eda344dc
Author: José Fonseca <[email protected]>
Date:   Sat May 2 08:57:39 2009 +0100

    wgl: Use pipe_screen::context_create.

commit 2595a188f93fd903600ef5d8517737ee0592035d
Author: José Fonseca <[email protected]>
Date:   Sat May 2 08:56:47 2009 +0100

    trace: Implement pipe_screen::context_create.

commit f3640e4ae37a5260cbfba999d079f827de0a313a
Author: José Fonseca <[email protected]>
Date:   Sat May 2 08:56:17 2009 +0100

    softpipe: Implement pipe_screen::context_create.

commit 347266bddc8bd39c711bacb2193793759d0f3696
Author: José Fonseca <[email protected]>
Date:   Sat May 2 08:55:31 2009 +0100

    gallium: New pipe_screen::context_create callback.

55 files changed, 156 insertions, 124 deletions

diff --git a/src/gallium/drivers/cell/ppu/cell_context.c b/src/gallium/drivers/cell/ppu/cell_context.c
index 30aa04482e3..5bff9869fd0 100644
--- a/src/gallium/drivers/cell/ppu/cell_context.c
+++ b/src/gallium/drivers/cell/ppu/cell_context.c
@@ -124,7 +124,7 @@ cell_is_buffer_referenced( struct pipe_context *pipe,
 
 struct pipe_context *
 cell_create_context(struct pipe_screen *screen,
-                    struct cell_winsys *cws)
+                    void *priv )
 {
    struct cell_context *cell;
    uint i;
@@ -136,9 +136,10 @@ cell_create_context(struct pipe_screen *screen,
 
    memset(cell, 0, sizeof(*cell));
 
-   cell->winsys = cws;
+   cell->winsys = NULL;		/* XXX: fixme - get this from screen? */
    cell->pipe.winsys = screen->winsys;
    cell->pipe.screen = screen;
+   cell->pipe.priv = priv;
    cell->pipe.destroy = cell_destroy_context;
 
    cell->pipe.clear = cell_clear;
diff --git a/src/gallium/drivers/cell/ppu/cell_context.h b/src/gallium/drivers/cell/ppu/cell_context.h
index e402ed29220..905cd5db390 100644
--- a/src/gallium/drivers/cell/ppu/cell_context.h
+++ b/src/gallium/drivers/cell/ppu/cell_context.h
@@ -188,8 +188,9 @@ cell_context(struct pipe_context *pipe)
 }
 
 
-extern struct pipe_context *
-cell_create_context(struct pipe_screen *screen, struct cell_winsys *cws);
+struct pipe_context *
+cell_create_context(struct pipe_screen *screen,
+                    void *priv );
 
 extern void
 cell_vertex_shader_queue_flush(struct draw_context *draw);
diff --git a/src/gallium/drivers/cell/ppu/cell_screen.c b/src/gallium/drivers/cell/ppu/cell_screen.c
index c329c6682dd..7681e3411e8 100644
--- a/src/gallium/drivers/cell/ppu/cell_screen.c
+++ b/src/gallium/drivers/cell/ppu/cell_screen.c
@@ -174,6 +174,7 @@ cell_create_screen(struct pipe_winsys *winsys)
    screen->get_param = cell_get_param;
    screen->get_paramf = cell_get_paramf;
    screen->is_format_supported = cell_is_format_supported;
+   screen->context_create = cell_create_context;
 
    cell_init_screen_texture_funcs(screen);
    u_simple_screen_init(screen);
diff --git a/src/gallium/drivers/cell/ppu/cell_winsys.h b/src/gallium/drivers/cell/ppu/cell_winsys.h
index ae2af5696b5..e227e065ff3 100644
--- a/src/gallium/drivers/cell/ppu/cell_winsys.h
+++ b/src/gallium/drivers/cell/ppu/cell_winsys.h
@@ -38,13 +38,10 @@
  */
 struct cell_winsys
 {
-   uint preferredFormat;
+   uint dummy;
 };
 
 
-extern struct cell_winsys *
-cell_get_winsys(uint format);
-
 
 
 #endif
diff --git a/src/gallium/drivers/i915/i915_context.c b/src/gallium/drivers/i915/i915_context.c
index f8219c9f299..3d45a22b7e7 100644
--- a/src/gallium/drivers/i915/i915_context.c
+++ b/src/gallium/drivers/i915/i915_context.c
@@ -183,7 +183,7 @@ static void i915_destroy(struct pipe_context *pipe)
 }
 
 struct pipe_context *
-i915_create_context(struct pipe_screen *screen)
+i915_create_context(struct pipe_screen *screen, void *priv)
 {
    struct i915_context *i915;
 
@@ -194,6 +194,7 @@ i915_create_context(struct pipe_screen *screen)
    i915->iws = i915_screen(screen)->iws;
    i915->base.winsys = NULL;
    i915->base.screen = screen;
+   i915->base.priv = priv;
 
    i915->base.destroy = i915_destroy;
 
diff --git a/src/gallium/drivers/i915/i915_context.h b/src/gallium/drivers/i915/i915_context.h
index 6ec5566d5df..1479d2201a9 100644
--- a/src/gallium/drivers/i915/i915_context.h
+++ b/src/gallium/drivers/i915/i915_context.h
@@ -334,6 +334,11 @@ void i915_init_flush_functions( struct i915_context *i915 );
 void i915_init_string_functions( struct i915_context *i915 );
 
 
+/************************************************************************
+ * i915_context.c
+ */
+struct pipe_context *i915_create_context(struct pipe_screen *screen,
+					 void *priv);
 
 
 /***********************************************************************
diff --git a/src/gallium/drivers/i915/i915_screen.c b/src/gallium/drivers/i915/i915_screen.c
index e6b560bc212..c450854c982 100644
--- a/src/gallium/drivers/i915/i915_screen.c
+++ b/src/gallium/drivers/i915/i915_screen.c
@@ -294,6 +294,8 @@ i915_create_screen(struct intel_winsys *iws, uint pci_id)
    is->base.get_paramf = i915_get_paramf;
    is->base.is_format_supported = i915_is_format_supported;
 
+   is->base.context_create = i915_create_context;
+
    is->base.fence_reference = i915_fence_reference;
    is->base.fence_signalled = i915_fence_signalled;
    is->base.fence_finish = i915_fence_finish;
diff --git a/src/gallium/drivers/i915/intel_winsys.h b/src/gallium/drivers/i915/intel_winsys.h
index c6bf6e6f7f1..b3a802b0e29 100644
--- a/src/gallium/drivers/i915/intel_winsys.h
+++ b/src/gallium/drivers/i915/intel_winsys.h
@@ -203,10 +203,6 @@ struct intel_winsys {
  */
 struct pipe_screen *i915_create_screen(struct intel_winsys *iws, unsigned pci_id);
 
-/**
- * Create a i915 pipe_context.
- */
-struct pipe_context *i915_create_context(struct pipe_screen *screen);
 
 /**
  * Get the intel_winsys buffer backing the texture.
diff --git a/src/gallium/drivers/i965/brw_context.c b/src/gallium/drivers/i965/brw_context.c
index 7cbda05ac58..3dbe2b91308 100644
--- a/src/gallium/drivers/i965/brw_context.c
+++ b/src/gallium/drivers/i965/brw_context.c
@@ -102,7 +102,8 @@ static void brw_destroy_context( struct pipe_context *pipe )
 }
 
 
-struct pipe_context *brw_create_context(struct pipe_screen *screen)
+struct pipe_context *brw_create_context(struct pipe_screen *screen,
+					void *priv)
 {
    struct brw_context *brw = (struct brw_context *) CALLOC_STRUCT(brw_context);
 
@@ -112,6 +113,7 @@ struct pipe_context *brw_create_context(struct pipe_screen *screen)
    }
 
    brw->base.screen = screen;
+   brw->base.priv = priv;
    brw->base.destroy = brw_destroy_context;
    brw->sws = brw_screen(screen)->sws;
    brw->chipset = brw_screen(screen)->chipset;
diff --git a/src/gallium/drivers/i965/brw_context.h b/src/gallium/drivers/i965/brw_context.h
index 8c006bb95b2..19fda423de0 100644
--- a/src/gallium/drivers/i965/brw_context.h
+++ b/src/gallium/drivers/i965/brw_context.h
@@ -837,6 +837,10 @@ int brw_upload_urb_fence(struct brw_context *brw);
  */
 int brw_upload_cs_urb_state(struct brw_context *brw);
 
+/* brw_context.c
+ */
+struct pipe_context *brw_create_context(struct pipe_screen *screen,
+					void *priv);
 
 /*======================================================================
  * Inline conversion functions.  These are better-typed than the
diff --git a/src/gallium/drivers/i965/brw_screen.c b/src/gallium/drivers/i965/brw_screen.c
index 1d79d84dc65..184cd490e55 100644
--- a/src/gallium/drivers/i965/brw_screen.c
+++ b/src/gallium/drivers/i965/brw_screen.c
@@ -397,6 +397,7 @@ brw_create_screen(struct brw_winsys_screen *sws, uint pci_id)
    bscreen->base.get_param = brw_get_param;
    bscreen->base.get_paramf = brw_get_paramf;
    bscreen->base.is_format_supported = brw_is_format_supported;
+   bscreen->base.context_create = brw_create_context;
    bscreen->base.fence_reference = brw_fence_reference;
    bscreen->base.fence_signalled = brw_fence_signalled;
    bscreen->base.fence_finish = brw_fence_finish;
diff --git a/src/gallium/drivers/i965/brw_winsys.h b/src/gallium/drivers/i965/brw_winsys.h
index 8841de2611e..c82d00f4a47 100644
--- a/src/gallium/drivers/i965/brw_winsys.h
+++ b/src/gallium/drivers/i965/brw_winsys.h
@@ -256,10 +256,6 @@ bo_reference(struct brw_winsys_buffer **ptr, struct brw_winsys_buffer *buf)
  */
 struct pipe_screen *brw_create_screen(struct brw_winsys_screen *iws, unsigned pci_id);
 
-/**
- * Create a brw pipe_context.
- */
-struct pipe_context *brw_create_context(struct pipe_screen *screen);
 
 /**
  * Get the brw_winsys buffer backing the texture.
diff --git a/src/gallium/drivers/identity/id_context.c b/src/gallium/drivers/identity/id_context.c
index f9063d90fb1..40962a3ccf6 100644
--- a/src/gallium/drivers/identity/id_context.c
+++ b/src/gallium/drivers/identity/id_context.c
@@ -692,7 +692,7 @@ identity_context_create(struct pipe_screen *_screen, struct pipe_context *pipe)
 
    id_pipe->base.winsys = NULL;
    id_pipe->base.screen = _screen;
-   id_pipe->base.priv = pipe->priv;
+   id_pipe->base.priv = pipe->priv; /* expose wrapped data */
    id_pipe->base.draw = NULL;
 
    id_pipe->base.destroy = identity_destroy;
diff --git a/src/gallium/drivers/identity/id_context.h b/src/gallium/drivers/identity/id_context.h
index 75b73fc7df6..6d3c1899d59 100644
--- a/src/gallium/drivers/identity/id_context.h
+++ b/src/gallium/drivers/identity/id_context.h
@@ -39,6 +39,10 @@ struct identity_context {
 };
 
 
+struct pipe_context *
+identity_context_create(struct pipe_screen *screen, struct pipe_context *pipe);
+
+
 static INLINE struct identity_context *
 identity_context(struct pipe_context *pipe)
 {
diff --git a/src/gallium/drivers/identity/id_drm.c b/src/gallium/drivers/identity/id_drm.c
index 14f68ac0d00..12b516b445f 100644
--- a/src/gallium/drivers/identity/id_drm.c
+++ b/src/gallium/drivers/identity/id_drm.c
@@ -63,22 +63,6 @@ identity_drm_create_screen(struct drm_api *_api, int fd,
    return identity_screen_create(screen);
 }
 
-static struct pipe_context *
-identity_drm_create_context(struct drm_api *_api,
-                            struct pipe_screen *_screen)
-{
-   struct identity_screen *id_screen = identity_screen(_screen);
-   struct identity_drm_api *id_api = identity_drm_api(_api);
-   struct pipe_screen *screen = id_screen->screen;
-   struct drm_api *api = id_api->api;
-   struct pipe_context *pipe;
-
-   pipe = api->create_context(api, screen);
-
-   pipe = identity_context_create(_screen, pipe);
-
-   return pipe;
-}
 
 static struct pipe_texture *
 identity_drm_texture_from_shared_handle(struct drm_api *_api,
@@ -159,7 +143,6 @@ identity_drm_create(struct drm_api *api)
       goto error;
 
    id_api->base.create_screen = identity_drm_create_screen;
-   id_api->base.create_context = identity_drm_create_context;
    id_api->base.texture_from_shared_handle = identity_drm_texture_from_shared_handle;
    id_api->base.shared_handle_from_texture = identity_drm_shared_handle_from_texture;
    id_api->base.local_handle_from_texture = identity_drm_local_handle_from_texture;
diff --git a/src/gallium/drivers/identity/id_public.h b/src/gallium/drivers/identity/id_public.h
index 3d2862eaa01..d0d5847c61c 100644
--- a/src/gallium/drivers/identity/id_public.h
+++ b/src/gallium/drivers/identity/id_public.h
@@ -34,7 +34,4 @@ struct pipe_context;
 struct pipe_screen *
 identity_screen_create(struct pipe_screen *screen);
 
-struct pipe_context *
-identity_context_create(struct pipe_screen *screen, struct pipe_context *pipe);
-
 #endif /* ID_PUBLIC_H */
diff --git a/src/gallium/drivers/identity/id_screen.c b/src/gallium/drivers/identity/id_screen.c
index 53eae3ef544..b85492114a3 100644
--- a/src/gallium/drivers/identity/id_screen.c
+++ b/src/gallium/drivers/identity/id_screen.c
@@ -32,6 +32,7 @@
 
 #include "id_public.h"
 #include "id_screen.h"
+#include "id_context.h"
 #include "id_objects.h"
 
 
@@ -103,6 +104,20 @@ identity_screen_is_format_supported(struct pipe_screen *_screen,
                                       geom_flags);
 }
 
+static struct pipe_context *
+identity_screen_context_create(struct pipe_screen *_screen,
+                               void *priv)
+{
+   struct identity_screen *id_screen = identity_screen(_screen);
+   struct pipe_screen *screen = id_screen->screen;
+   struct pipe_context *result;
+
+   result = screen->context_create(screen, priv);
+   if (result)
+      return identity_context_create(_screen, result);
+   return NULL;
+}
+
 static struct pipe_texture *
 identity_screen_texture_create(struct pipe_screen *_screen,
                                const struct pipe_texture *templat)
@@ -478,6 +493,7 @@ identity_screen_create(struct pipe_screen *screen)
    id_screen->base.get_param = identity_screen_get_param;
    id_screen->base.get_paramf = identity_screen_get_paramf;
    id_screen->base.is_format_supported = identity_screen_is_format_supported;
+   id_screen->base.context_create = identity_screen_context_create;
    id_screen->base.texture_create = identity_screen_texture_create;
    id_screen->base.texture_blanket = identity_screen_texture_blanket;
    id_screen->base.texture_destroy = identity_screen_texture_destroy;
diff --git a/src/gallium/drivers/llvmpipe/lp_context.c b/src/gallium/drivers/llvmpipe/lp_context.c
index a76bde39054..43d610631da 100644
--- a/src/gallium/drivers/llvmpipe/lp_context.c
+++ b/src/gallium/drivers/llvmpipe/lp_context.c
@@ -104,7 +104,7 @@ llvmpipe_is_buffer_referenced( struct pipe_context *pipe,
 }
 
 struct pipe_context *
-llvmpipe_create( struct pipe_screen *screen )
+llvmpipe_create_context( struct pipe_screen *screen, void *priv )
 {
    struct llvmpipe_context *llvmpipe;
 
@@ -118,6 +118,7 @@ llvmpipe_create( struct pipe_screen *screen )
 
    llvmpipe->pipe.winsys = screen->winsys;
    llvmpipe->pipe.screen = screen;
+   llvmpipe->pipe.priv = priv;
    llvmpipe->pipe.destroy = llvmpipe_destroy;
 
    /* state setters */
diff --git a/src/gallium/drivers/llvmpipe/lp_context.h b/src/gallium/drivers/llvmpipe/lp_context.h
index 3af7b62a53b..3bde485ac0c 100644
--- a/src/gallium/drivers/llvmpipe/lp_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_context.h
@@ -108,6 +108,10 @@ struct llvmpipe_context {
 };
 
 
+struct pipe_context *
+llvmpipe_create_context( struct pipe_screen *screen, void *priv );
+
+
 static INLINE struct llvmpipe_context *
 llvmpipe_context( struct pipe_context *pipe )
 {
diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index ca64c418276..1cd3ea9a840 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -37,6 +37,7 @@
 #include "lp_winsys.h"
 #include "lp_jit.h"
 #include "lp_screen.h"
+#include "lp_context.h"
 #include "lp_debug.h"
 
 #ifdef DEBUG
@@ -310,6 +311,7 @@ llvmpipe_create_screen(struct llvmpipe_winsys *winsys)
    screen->base.is_format_supported = llvmpipe_is_format_supported;
 
    screen->base.surface_buffer_create = llvmpipe_surface_buffer_create;
+   screen->base.context_create = llvmpipe_create_context;
    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 
    llvmpipe_init_screen_texture_funcs(&screen->base);
diff --git a/src/gallium/drivers/llvmpipe/lp_winsys.h b/src/gallium/drivers/llvmpipe/lp_winsys.h
index 74b472b6531..ce11fa93041 100644
--- a/src/gallium/drivers/llvmpipe/lp_winsys.h
+++ b/src/gallium/drivers/llvmpipe/lp_winsys.h
@@ -113,9 +113,6 @@ struct llvmpipe_winsys
 };
 
 
-struct pipe_context *
-llvmpipe_create( struct pipe_screen * );
-
 
 struct pipe_screen *
 llvmpipe_create_screen( struct llvmpipe_winsys * );
diff --git a/src/gallium/drivers/nouveau/nouveau_winsys.h b/src/gallium/drivers/nouveau/nouveau_winsys.h
index 4c5d2f8b1c1..af9ddd558c8 100644
--- a/src/gallium/drivers/nouveau/nouveau_winsys.h
+++ b/src/gallium/drivers/nouveau/nouveau_winsys.h
@@ -29,19 +29,10 @@
 extern struct pipe_screen *
 nv30_screen_create(struct pipe_winsys *ws, struct nouveau_device *);
 
-extern struct pipe_context *
-nv30_create(struct pipe_screen *, unsigned pctx_id);
-
 extern struct pipe_screen *
 nv40_screen_create(struct pipe_winsys *ws, struct nouveau_device *);
 
-extern struct pipe_context *
-nv40_create(struct pipe_screen *, unsigned pctx_id);
-
 extern struct pipe_screen *
 nv50_screen_create(struct pipe_winsys *ws, struct nouveau_device *);
 
-extern struct pipe_context *
-nv50_create(struct pipe_screen *, unsigned pctx_id);
-
 #endif
diff --git a/src/gallium/drivers/nv30/nv30_context.c b/src/gallium/drivers/nv30/nv30_context.c
index 8a40cea2e50..8bfd7b2c909 100644
--- a/src/gallium/drivers/nv30/nv30_context.c
+++ b/src/gallium/drivers/nv30/nv30_context.c
@@ -43,7 +43,7 @@ nv30_destroy(struct pipe_context *pipe)
 }
 
 struct pipe_context *
-nv30_create(struct pipe_screen *pscreen, unsigned pctx_id)
+nv30_create(struct pipe_screen *pscreen, void *priv)
 {
 	struct nv30_screen *screen = nv30_screen(pscreen);
 	struct pipe_winsys *ws = pscreen->winsys;
@@ -54,12 +54,12 @@ nv30_create(struct pipe_screen *pscreen, unsigned pctx_id)
 	if (!nv30)
 		return NULL;
 	nv30->screen = screen;
-	nv30->pctx_id = pctx_id;
 
 	nv30->nvws = nvws;
 
 	nv30->pipe.winsys = ws;
 	nv30->pipe.screen = pscreen;
+	nv30->pipe.priv = priv;
 	nv30->pipe.destroy = nv30_destroy;
 	nv30->pipe.draw_arrays = nv30_draw_arrays;
 	nv30->pipe.draw_elements = nv30_draw_elements;
diff --git a/src/gallium/drivers/nv30/nv30_context.h b/src/gallium/drivers/nv30/nv30_context.h
index 7d053383278..b3b26f7f94a 100644
--- a/src/gallium/drivers/nv30/nv30_context.h
+++ b/src/gallium/drivers/nv30/nv30_context.h
@@ -111,7 +111,6 @@ struct nv30_context {
 
 	struct nouveau_winsys *nvws;
 	struct nv30_screen *screen;
-	unsigned pctx_id;
 
 	struct draw_context *draw;
 
@@ -209,4 +208,8 @@ extern void nv30_draw_elements(struct pipe_context *pipe,
 extern void nv30_clear(struct pipe_context *pipe, unsigned buffers,
 		       const float *rgba, double depth, unsigned stencil);
 
+/* nv30_context.c */
+struct pipe_context *
+nv30_create(struct pipe_screen *pscreen, void *priv);
+
 #endif
diff --git a/src/gallium/drivers/nv30/nv30_screen.c b/src/gallium/drivers/nv30/nv30_screen.c
index 62ee2e7697a..8f9b26ea56f 100644
--- a/src/gallium/drivers/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nv30/nv30_screen.c
@@ -20,9 +20,6 @@ struct nouveau_winsys {
 
 	struct pipe_screen *pscreen;
 
-	unsigned nr_pctx;
-	struct pipe_context **pctx;
-
 	struct pipe_surface *front;
 };
 
@@ -212,6 +209,7 @@ nv30_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->get_param = nv30_screen_get_param;
 	pscreen->get_paramf = nv30_screen_get_paramf;
 	pscreen->is_format_supported = nv30_screen_surface_format_supported;
+	pscreen->context_create = nv30_create;
 
 	nv30_screen_init_miptree_functions(pscreen);
 	nv30_screen_init_transfer_functions(pscreen);
diff --git a/src/gallium/drivers/nv30/nv30_screen.h b/src/gallium/drivers/nv30/nv30_screen.h
index 744a72de91a..8591cd31cab 100644
--- a/src/gallium/drivers/nv30/nv30_screen.h
+++ b/src/gallium/drivers/nv30/nv30_screen.h
@@ -10,7 +10,7 @@ struct nv30_screen {
 
 	struct nouveau_winsys *nvws;
 
-	unsigned cur_pctx;
+	struct nv30_context *cur_ctx;
 
 	/* HW graphics objects */
 	struct nv04_surface_2d *eng2d;
diff --git a/src/gallium/drivers/nv30/nv30_state_emit.c b/src/gallium/drivers/nv30/nv30_state_emit.c
index ac52d946f02..d9650f63eb2 100644
--- a/src/gallium/drivers/nv30/nv30_state_emit.c
+++ b/src/gallium/drivers/nv30/nv30_state_emit.c
@@ -44,13 +44,15 @@ nv30_state_emit(struct nv30_context *nv30)
 	unsigned i;
 	uint64_t states;
 
-	if (nv30->pctx_id != screen->cur_pctx) {
+	/* XXX: racy!
+	 */
+	if (nv30 != screen->cur_ctx) {
 		for (i = 0; i < NV30_STATE_MAX; i++) {
 			if (state->hw[i] && screen->state[i] != state->hw[i])
 				state->dirty |= (1ULL << i);
 		}
 
-		screen->cur_pctx = nv30->pctx_id;
+		screen->cur_ctx = nv30;
 	}
 
 	for (i = 0, states = state->dirty; states; i++) {
diff --git a/src/gallium/drivers/nv40/nv40_context.c b/src/gallium/drivers/nv40/nv40_context.c
index ffe25ffebd5..b0b90032de1 100644
--- a/src/gallium/drivers/nv40/nv40_context.c
+++ b/src/gallium/drivers/nv40/nv40_context.c
@@ -43,7 +43,7 @@ nv40_destroy(struct pipe_context *pipe)
 }
 
 struct pipe_context *
-nv40_create(struct pipe_screen *pscreen, unsigned pctx_id)
+nv40_create(struct pipe_screen *pscreen, void *priv)
 {
 	struct nv40_screen *screen = nv40_screen(pscreen);
 	struct pipe_winsys *ws = pscreen->winsys;
@@ -54,11 +54,11 @@ nv40_create(struct pipe_screen *pscreen, unsigned pctx_id)
 	if (!nv40)
 		return NULL;
 	nv40->screen = screen;
-	nv40->pctx_id = pctx_id;
 
 	nv40->nvws = nvws;
 
 	nv40->pipe.winsys = ws;
+	nv40->pipe.priv = priv;
 	nv40->pipe.screen = pscreen;
 	nv40->pipe.destroy = nv40_destroy;
 	nv40->pipe.draw_arrays = nv40_draw_arrays;
diff --git a/src/gallium/drivers/nv40/nv40_context.h b/src/gallium/drivers/nv40/nv40_context.h
index 3998cf2dd35..958a48f2a4a 100644
--- a/src/gallium/drivers/nv40/nv40_context.h
+++ b/src/gallium/drivers/nv40/nv40_context.h
@@ -111,7 +111,6 @@ struct nv40_context {
 
 	struct nouveau_winsys *nvws;
 	struct nv40_screen *screen;
-	unsigned pctx_id;
 
 	struct draw_context *draw;
 
@@ -230,4 +229,8 @@ extern void nv40_draw_elements(struct pipe_context *pipe,
 extern void nv40_clear(struct pipe_context *pipe, unsigned buffers,
 		       const float *rgba, double depth, unsigned stencil);
 
+/* nv40_context.c */
+struct pipe_context *
+nv40_create(struct pipe_screen *pscreen, void *priv);
+
 #endif
diff --git a/src/gallium/drivers/nv40/nv40_screen.c b/src/gallium/drivers/nv40/nv40_screen.c
index 56fb80975cc..001147e752f 100644
--- a/src/gallium/drivers/nv40/nv40_screen.c
+++ b/src/gallium/drivers/nv40/nv40_screen.c
@@ -196,6 +196,7 @@ nv40_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->get_param = nv40_screen_get_param;
 	pscreen->get_paramf = nv40_screen_get_paramf;
 	pscreen->is_format_supported = nv40_screen_surface_format_supported;
+	pscreen->context_create = nv40_create;
 
 	nv40_screen_init_miptree_functions(pscreen);
 	nv40_screen_init_transfer_functions(pscreen);
diff --git a/src/gallium/drivers/nv40/nv40_screen.h b/src/gallium/drivers/nv40/nv40_screen.h
index 98fde8755b9..9437aa050d4 100644
--- a/src/gallium/drivers/nv40/nv40_screen.h
+++ b/src/gallium/drivers/nv40/nv40_screen.h
@@ -9,7 +9,7 @@ struct nv40_screen {
 
 	struct nouveau_winsys *nvws;
 
-	unsigned cur_pctx;
+	struct nv40_context *cur_ctx;
 
 	/* HW graphics objects */
 	struct nv04_surface_2d *eng2d;
diff --git a/src/gallium/drivers/nv40/nv40_state_emit.c b/src/gallium/drivers/nv40/nv40_state_emit.c
index 13fe854915b..1c4007a129e 100644
--- a/src/gallium/drivers/nv40/nv40_state_emit.c
+++ b/src/gallium/drivers/nv40/nv40_state_emit.c
@@ -61,13 +61,15 @@ nv40_state_emit(struct nv40_context *nv40)
 	unsigned i;
 	uint64_t states;
 
-	if (nv40->pctx_id != screen->cur_pctx) {
+	/* XXX: race conditions
+	 */
+	if (nv40 != screen->cur_ctx) {
 		for (i = 0; i < NV40_STATE_MAX; i++) {
 			if (state->hw[i] && screen->state[i] != state->hw[i])
 				state->dirty |= (1ULL << i);
 		}
 
-		screen->cur_pctx = nv40->pctx_id;
+		screen->cur_ctx = nv40;
 	}
 
 	for (i = 0, states = state->dirty; states; i++) {
diff --git a/src/gallium/drivers/nv50/nv50_context.c b/src/gallium/drivers/nv50/nv50_context.c
index ac1abc1d5cc..867bd03e69d 100644
--- a/src/gallium/drivers/nv50/nv50_context.c
+++ b/src/gallium/drivers/nv50/nv50_context.c
@@ -95,7 +95,7 @@ nv50_destroy(struct pipe_context *pipe)
 
 
 struct pipe_context *
-nv50_create(struct pipe_screen *pscreen, unsigned pctx_id)
+nv50_create(struct pipe_screen *pscreen, void *priv)
 {
 	struct pipe_winsys *pipe_winsys = pscreen->winsys;
 	struct nv50_screen *screen = nv50_screen(pscreen);
@@ -105,10 +105,10 @@ nv50_create(struct pipe_screen *pscreen, unsigned pctx_id)
 	if (!nv50)
 		return NULL;
 	nv50->screen = screen;
-	nv50->pctx_id = pctx_id;
 
 	nv50->pipe.winsys = pipe_winsys;
 	nv50->pipe.screen = pscreen;
+	nv50->pipe.priv = priv;
 
 	nv50->pipe.destroy = nv50_destroy;
 
diff --git a/src/gallium/drivers/nv50/nv50_context.h b/src/gallium/drivers/nv50/nv50_context.h
index 44d8f613427..14cef4c0bf8 100644
--- a/src/gallium/drivers/nv50/nv50_context.h
+++ b/src/gallium/drivers/nv50/nv50_context.h
@@ -145,7 +145,6 @@ struct nv50_context {
 	struct pipe_context pipe;
 
 	struct nv50_screen *screen;
-	unsigned pctx_id;
 
 	struct draw_context *draw;
 
@@ -250,4 +249,8 @@ nv50_upload_sifc(struct nv50_context *nv50,
 		 void *src, unsigned src_format, int src_pitch,
 		 int x, int y, int w, int h, int cpp);
 
+/* nv50_context.c */
+struct pipe_context *
+nv50_create(struct pipe_screen *pscreen, void *priv);
+
 #endif
diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index 48c7b19584f..8c4478e483b 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -251,6 +251,7 @@ nv50_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->get_param = nv50_screen_get_param;
 	pscreen->get_paramf = nv50_screen_get_paramf;
 	pscreen->is_format_supported = nv50_screen_is_format_supported;
+	pscreen->context_create = nv50_create;
 	screen->base.pre_pipebuffer_map_callback = nv50_pre_pipebuffer_map;
 
 	nv50_screen_init_miptree_functions(pscreen);
diff --git a/src/gallium/drivers/nv50/nv50_screen.h b/src/gallium/drivers/nv50/nv50_screen.h
index 0d786b0f2e3..2687b721277 100644
--- a/src/gallium/drivers/nv50/nv50_screen.h
+++ b/src/gallium/drivers/nv50/nv50_screen.h
@@ -9,7 +9,6 @@ struct nv50_screen {
 
 	struct nouveau_winsys *nvws;
 
-	unsigned cur_pctx;
 	struct nv50_context *cur_ctx;
 
 	struct nouveau_grobj *tesla;
diff --git a/src/gallium/drivers/nv50/nv50_state_validate.c b/src/gallium/drivers/nv50/nv50_state_validate.c
index 956da9b304c..ee28fa63c14 100644
--- a/src/gallium/drivers/nv50/nv50_state_validate.c
+++ b/src/gallium/drivers/nv50/nv50_state_validate.c
@@ -185,10 +185,10 @@ nv50_state_emit(struct nv50_context *nv50)
 	struct nv50_screen *screen = nv50->screen;
 	struct nouveau_channel *chan = screen->base.channel;
 
-	/* I don't want to copy headers from the winsys. */
-	screen->cur_ctx = nv50;
-
-	if (nv50->pctx_id != screen->cur_pctx) {
+	/* XXX: this is racy for multiple contexts active on separate
+	 * threads.
+	 */
+	if (screen->cur_ctx != nv50) {
 		if (nv50->state.fb)
 			nv50->state.dirty |= NV50_NEW_FRAMEBUFFER;
 		if (nv50->state.blend)
@@ -217,7 +217,7 @@ nv50_state_emit(struct nv50_context *nv50)
 			nv50->state.dirty |= NV50_NEW_TEXTURE;
 		if (nv50->state.vtxfmt && nv50->state.vtxbuf)
 			nv50->state.dirty |= NV50_NEW_ARRAYS;
-		screen->cur_pctx = nv50->pctx_id;
+		screen->cur_ctx = nv50;
 	}
 
 	if (nv50->state.dirty & NV50_NEW_FRAMEBUFFER)
diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c
index 2df2dcfcad9..14820ca8547 100644
--- a/src/gallium/drivers/r300/r300_context.c
+++ b/src/gallium/drivers/r300/r300_context.c
@@ -131,10 +131,11 @@ static void r300_setup_atoms(struct r300_context* r300)
 }
 
 struct pipe_context* r300_create_context(struct pipe_screen* screen,
-                                         struct radeon_winsys* radeon_winsys)
+                                         void *priv)
 {
     struct r300_context* r300 = CALLOC_STRUCT(r300_context);
     struct r300_screen* r300screen = r300_screen(screen);
+    struct radeon_winsys* radeon_winsys = r300screen->radeon_winsys;
 
     if (!r300)
         return NULL;
@@ -143,6 +144,7 @@ struct pipe_context* r300_create_context(struct pipe_screen* screen,
 
     r300->context.winsys = (struct pipe_winsys*)radeon_winsys;
     r300->context.screen = screen;
+    r300->context.priv = priv;
 
     r300->context.destroy = r300_destroy_context;
 
diff --git a/src/gallium/drivers/r300/r300_context.h b/src/gallium/drivers/r300/r300_context.h
index ea9b4abfdeb..84617578128 100644
--- a/src/gallium/drivers/r300/r300_context.h
+++ b/src/gallium/drivers/r300/r300_context.h
@@ -336,6 +336,10 @@ static INLINE struct r300_context* r300_context(struct pipe_context* context)
     return (struct r300_context*)context;
 }
 
+
+struct pipe_context* r300_create_context(struct pipe_screen* screen,
+                                         void *priv);
+
 /* Context initialization. */
 struct draw_stage* r300_draw_stage(struct r300_context* r300);
 void r300_init_state_functions(struct r300_context* r300);
diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 2e04e313767..da4ec542ade 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -30,6 +30,7 @@
 #include "r300_texture.h"
 
 #include "radeon_winsys.h"
+#include "r300_winsys.h"
 
 /* Return the identifier behind whom the brave coders responsible for this
  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
@@ -391,6 +392,7 @@ struct pipe_screen* r300_create_screen(struct radeon_winsys* radeon_winsys)
     r300_parse_chipset(caps);
 
     r300screen->caps = caps;
+    r300screen->radeon_winsys = radeon_winsys;
     r300screen->screen.winsys = (struct pipe_winsys*)radeon_winsys;
     r300screen->screen.destroy = r300_destroy_screen;
     r300screen->screen.get_name = r300_get_name;
@@ -398,6 +400,7 @@ struct pipe_screen* r300_create_screen(struct radeon_winsys* radeon_winsys)
     r300screen->screen.get_param = r300_get_param;
     r300screen->screen.get_paramf = r300_get_paramf;
     r300screen->screen.is_format_supported = r300_is_format_supported;
+    r300screen->screen.context_create = r300_create_context;
     r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
     r300screen->screen.tex_transfer_destroy = r300_tex_transfer_destroy;
     r300screen->screen.transfer_map = r300_transfer_map;
diff --git a/src/gallium/drivers/r300/r300_screen.h b/src/gallium/drivers/r300/r300_screen.h
index 580fda3984e..502fbfa5a24 100644
--- a/src/gallium/drivers/r300/r300_screen.h
+++ b/src/gallium/drivers/r300/r300_screen.h
@@ -33,6 +33,8 @@ struct r300_screen {
     /* Parent class */
     struct pipe_screen screen;
 
+    struct radeon_winsys* radeon_winsys;
+
     /* Chipset capabilities */
     struct r300_capabilities* caps;
 
@@ -60,9 +62,6 @@ r300_transfer(struct pipe_transfer* transfer)
     return (struct r300_transfer*)transfer;
 }
 
-/* Creates a new r300 screen. */
-struct pipe_screen* r300_create_screen(struct radeon_winsys* radeon_winsys);
-
 /* Debug functionality. */
 
 /**
diff --git a/src/gallium/drivers/r300/r300_winsys.h b/src/gallium/drivers/r300/r300_winsys.h
index d4842e94ae9..f4a8ae120c8 100644
--- a/src/gallium/drivers/r300/r300_winsys.h
+++ b/src/gallium/drivers/r300/r300_winsys.h
@@ -29,7 +29,7 @@ extern "C" {
 
 /* The public interface header for the r300 pipe driver.
  * Any winsys hosting this pipe needs to implement r300_winsys and then
- * call r300_create_context to start things. */
+ * call r300_create_screen to start things. */
 
 #include "pipe/p_defines.h"
 #include "pipe/p_state.h"
@@ -37,8 +37,9 @@ extern "C" {
 
 #include "radeon_winsys.h"
 
-struct pipe_context* r300_create_context(struct pipe_screen* screen,
-                                         struct radeon_winsys* radeon_winsys);
+/* Creates a new r300 screen. */
+struct pipe_screen* r300_create_screen(struct radeon_winsys* radeon_winsys);
+
 
 boolean r300_get_texture_buffer(struct pipe_screen* screen,
                                 struct pipe_texture* texture,
diff --git a/src/gallium/drivers/softpipe/sp_context.c b/src/gallium/drivers/softpipe/sp_context.c
index b1cfe59bc18..480b269e7f5 100644
--- a/src/gallium/drivers/softpipe/sp_context.c
+++ b/src/gallium/drivers/softpipe/sp_context.c
@@ -194,7 +194,8 @@ softpipe_render_condition( struct pipe_context *pipe,
 
 
 struct pipe_context *
-softpipe_create( struct pipe_screen *screen )
+softpipe_create_context( struct pipe_screen *screen,
+			 void *priv )
 {
    struct softpipe_context *softpipe = CALLOC_STRUCT(softpipe_context);
    uint i;
@@ -213,6 +214,7 @@ softpipe_create( struct pipe_screen *screen )
    softpipe->pipe.winsys = screen->winsys;
    softpipe->pipe.screen = screen;
    softpipe->pipe.destroy = softpipe_destroy;
+   softpipe->pipe.priv = priv;
 
    /* state setters */
    softpipe->pipe.create_blend_state = softpipe_create_blend_state;
diff --git a/src/gallium/drivers/softpipe/sp_context.h b/src/gallium/drivers/softpipe/sp_context.h
index be4613b6228..62f9e7aad3d 100644
--- a/src/gallium/drivers/softpipe/sp_context.h
+++ b/src/gallium/drivers/softpipe/sp_context.h
@@ -166,5 +166,8 @@ softpipe_context( struct pipe_context *pipe )
 void
 softpipe_reset_sampler_varients(struct softpipe_context *softpipe);
 
+struct pipe_context *
+softpipe_create_context( struct pipe_screen *, void *priv );
+
 
 #endif /* SP_CONTEXT_H */
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index ee6969e60fb..87415f43404 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -35,6 +35,7 @@
 #include "sp_texture.h"
 #include "sp_winsys.h"
 #include "sp_screen.h"
+#include "sp_context.h"
 
 
 static const char *
@@ -204,6 +205,7 @@ softpipe_create_screen(struct pipe_winsys *winsys)
    screen->base.get_param = softpipe_get_param;
    screen->base.get_paramf = softpipe_get_paramf;
    screen->base.is_format_supported = softpipe_is_format_supported;
+   screen->base.context_create = softpipe_create_context;
 
    softpipe_init_screen_texture_funcs(&screen->base);
    u_simple_screen_init(&screen->base);
diff --git a/src/gallium/drivers/softpipe/sp_video_context.c b/src/gallium/drivers/softpipe/sp_video_context.c
index 7a8b132ddcd..f3dab83fa61 100644
--- a/src/gallium/drivers/softpipe/sp_video_context.c
+++ b/src/gallium/drivers/softpipe/sp_video_context.c
@@ -250,7 +250,7 @@ sp_mpeg12_create(struct pipe_screen *screen, enum pipe_video_profile profile,
    ctx->base.set_decode_target = sp_mpeg12_set_decode_target;
    ctx->base.set_csc_matrix = sp_mpeg12_set_csc_matrix;
 
-   ctx->pipe = softpipe_create(screen);
+   ctx->pipe = screen->context_create(screen, NULL);
    if (!ctx->pipe) {
       FREE(ctx);
       return NULL;
diff --git a/src/gallium/drivers/softpipe/sp_winsys.h b/src/gallium/drivers/softpipe/sp_winsys.h
index 3042e01a05c..6e3920c49b2 100644
--- a/src/gallium/drivers/softpipe/sp_winsys.h
+++ b/src/gallium/drivers/softpipe/sp_winsys.h
@@ -47,7 +47,6 @@ struct pipe_texture;
 struct pipe_buffer;
 
 
-struct pipe_context *softpipe_create( struct pipe_screen * );
 
 /**
  * Create a softpipe screen that uses the
diff --git a/src/gallium/drivers/svga/svga_context.c b/src/gallium/drivers/svga/svga_context.c
index c4181c3f5b7..d499ae6acc9 100644
--- a/src/gallium/drivers/svga/svga_context.c
+++ b/src/gallium/drivers/svga/svga_context.c
@@ -126,7 +126,8 @@ svga_is_buffer_referenced( struct pipe_context *pipe,
 }
 
 
-struct pipe_context *svga_context_create( struct pipe_screen *screen )
+struct pipe_context *svga_context_create( struct pipe_screen *screen,
+					  void *priv )
 {
    struct svga_screen *svgascreen = svga_screen(screen);
    struct svga_context *svga = NULL;
@@ -138,6 +139,7 @@ struct pipe_context *svga_context_create( struct pipe_screen *screen )
 
    svga->pipe.winsys = screen->winsys;
    svga->pipe.screen = screen;
+   svga->pipe.priv = priv;
    svga->pipe.destroy = svga_destroy;
    svga->pipe.clear = svga_clear;
 
diff --git a/src/gallium/drivers/svga/svga_context.h b/src/gallium/drivers/svga/svga_context.h
index ba86256eb26..e93acc5f9f7 100644
--- a/src/gallium/drivers/svga/svga_context.h
+++ b/src/gallium/drivers/svga/svga_context.h
@@ -426,6 +426,10 @@ void svga_context_flush( struct svga_context *svga,
 
 void svga_hwtnl_flush_retry( struct svga_context *svga );
 
+struct pipe_context *
+svga_context_create(struct pipe_screen *screen,
+		    void *priv);
+
 
 /***********************************************************************
  * Inline conversion functions.  These are better-typed than the
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 6933d515629..5e11163d180 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -366,6 +366,7 @@ svga_screen_create(struct svga_winsys_screen *sws)
    screen->get_param = svga_get_param;
    screen->get_paramf = svga_get_paramf;
    screen->is_format_supported = svga_is_format_supported;
+   screen->context_create = svga_context_create;
    screen->fence_reference = svga_fence_reference;
    screen->fence_signalled = svga_fence_signalled;
    screen->fence_finish = svga_fence_finish;
diff --git a/src/gallium/drivers/svga/svga_winsys.h b/src/gallium/drivers/svga/svga_winsys.h
index 27b99fe4c10..b4e3af0eafc 100644
--- a/src/gallium/drivers/svga/svga_winsys.h
+++ b/src/gallium/drivers/svga/svga_winsys.h
@@ -272,9 +272,6 @@ struct svga_winsys_screen
 };
 
 
-struct pipe_context *
-svga_context_create(struct pipe_screen *screen);
-
 struct pipe_screen *
 svga_screen_create(struct svga_winsys_screen *sws);
 
diff --git a/src/gallium/drivers/trace/tr_context.c b/src/gallium/drivers/trace/tr_context.c
index 5a9f0fc6901..34ceaa41c15 100644
--- a/src/gallium/drivers/trace/tr_context.c
+++ b/src/gallium/drivers/trace/tr_context.c
@@ -1236,12 +1236,10 @@ static const struct debug_named_value rbug_blocker_flags[] = {
 };
 
 struct pipe_context *
-trace_context_create(struct pipe_screen *_screen,
+trace_context_create(struct trace_screen *tr_scr,
                      struct pipe_context *pipe)
 {
-   struct trace_screen *tr_scr;
    struct trace_context *tr_ctx;
-   struct pipe_screen *screen;
 
    if(!pipe)
       goto error1;
@@ -1249,13 +1247,13 @@ trace_context_create(struct pipe_screen *_screen,
    if(!trace_enabled())
       goto error1;
 
-   tr_scr = trace_screen(_screen);
-   screen = tr_scr->screen;
-
    tr_ctx = CALLOC_STRUCT(trace_context);
    if(!tr_ctx)
       goto error1;
 
+   tr_ctx->base.winsys = NULL;
+   tr_ctx->base.priv = pipe->priv; /* expose wrapped priv data */
+   tr_ctx->base.screen = &tr_scr->base;
    tr_ctx->draw_blocker = debug_get_flags_option("RBUG_BLOCK",
                                                  rbug_blocker_flags,
                                                  0);
@@ -1264,8 +1262,6 @@ trace_context_create(struct pipe_screen *_screen,
    pipe_mutex_init(tr_ctx->list_mutex);
    make_empty_list(&tr_ctx->shaders);
 
-   tr_ctx->base.winsys = _screen->winsys;
-   tr_ctx->base.screen = _screen;
    tr_ctx->base.destroy = trace_context_destroy;
    tr_ctx->base.draw_arrays = trace_context_draw_arrays;
    tr_ctx->base.draw_elements = trace_context_draw_elements;
@@ -1316,11 +1312,6 @@ trace_context_create(struct pipe_screen *_screen,
 
    tr_ctx->pipe = pipe;
 
-   trace_dump_call_begin("", "pipe_context_create");
-   trace_dump_arg(ptr, screen);
-   trace_dump_ret(ptr, pipe);
-   trace_dump_call_end();
-
    trace_screen_add_to_list(tr_scr, contexts, tr_ctx);
 
    return &tr_ctx->base;
diff --git a/src/gallium/drivers/trace/tr_context.h b/src/gallium/drivers/trace/tr_context.h
index 852b480765a..14284232485 100644
--- a/src/gallium/drivers/trace/tr_context.h
+++ b/src/gallium/drivers/trace/tr_context.h
@@ -40,6 +40,8 @@ extern "C" {
 #endif
 
 
+struct trace_screen;
+   
 struct trace_context
 {
    struct pipe_context base;
@@ -95,9 +97,8 @@ trace_context(struct pipe_context *pipe)
 }
 
 
-
 struct pipe_context *
-trace_context_create(struct pipe_screen *screen,
+trace_context_create(struct trace_screen *tr_scr,
                      struct pipe_context *pipe);
 
 void
diff --git a/src/gallium/drivers/trace/tr_drm.c b/src/gallium/drivers/trace/tr_drm.c
index e7ca3a86ead..919dc1b309f 100644
--- a/src/gallium/drivers/trace/tr_drm.c
+++ b/src/gallium/drivers/trace/tr_drm.c
@@ -65,24 +65,6 @@ trace_drm_create_screen(struct drm_api *_api, int fd,
    return trace_screen_create(screen);
 }
 
-static struct pipe_context *
-trace_drm_create_context(struct drm_api *_api,
-                         struct pipe_screen *_screen)
-{
-   struct trace_screen *tr_screen = trace_screen(_screen);
-   struct trace_drm_api *tr_api = trace_drm_api(_api);
-   struct pipe_screen *screen = tr_screen->screen;
-   struct drm_api *api = tr_api->api;
-   struct pipe_context *pipe;
-
-   /* TODO trace call */
-
-   pipe = api->create_context(api, screen);
-
-   pipe = trace_context_create(_screen, pipe);
-
-   return pipe;
-}
 
 static struct pipe_texture *
 trace_drm_texture_from_shared_handle(struct drm_api *_api,
@@ -175,7 +157,6 @@ trace_drm_create(struct drm_api *api)
 
    tr_api->base.driver_name = api->driver_name;
    tr_api->base.create_screen = trace_drm_create_screen;
-   tr_api->base.create_context = trace_drm_create_context;
    tr_api->base.texture_from_shared_handle = trace_drm_texture_from_shared_handle;
    tr_api->base.shared_handle_from_texture = trace_drm_shared_handle_from_texture;
    tr_api->base.local_handle_from_texture = trace_drm_local_handle_from_texture;
diff --git a/src/gallium/drivers/trace/tr_screen.c b/src/gallium/drivers/trace/tr_screen.c
index 6cdb4c04a81..388d83eb5c2 100644
--- a/src/gallium/drivers/trace/tr_screen.c
+++ b/src/gallium/drivers/trace/tr_screen.c
@@ -33,6 +33,7 @@
 #include "tr_dump.h"
 #include "tr_dump_state.h"
 #include "tr_texture.h"
+#include "tr_context.h"
 #include "tr_screen.h"
 
 #include "util/u_inlines.h"
@@ -159,6 +160,29 @@ trace_screen_is_format_supported(struct pipe_screen *_screen,
 }
 
 
+static struct pipe_context *
+trace_screen_context_create(struct pipe_screen *_screen, void *priv)
+{
+   struct trace_screen *tr_scr = trace_screen(_screen);
+   struct pipe_screen *screen = tr_scr->screen;
+   struct pipe_context *result;
+
+   trace_dump_call_begin("pipe_screen", "context_create");
+
+   trace_dump_arg(ptr, screen);
+
+   result = screen->context_create(screen, priv);
+
+   trace_dump_ret(ptr, result);
+
+   trace_dump_call_end();
+
+   result = trace_context_create(tr_scr, result);
+
+   return result;
+}
+
+
 static void
 trace_screen_flush_frontbuffer(struct pipe_screen *_screen,
                                struct pipe_surface *_surface,
@@ -904,6 +928,8 @@ trace_screen_create(struct pipe_screen *screen)
    tr_scr->base.get_param = trace_screen_get_param;
    tr_scr->base.get_paramf = trace_screen_get_paramf;
    tr_scr->base.is_format_supported = trace_screen_is_format_supported;
+   assert(screen->context_create);
+   tr_scr->base.context_create = trace_screen_context_create;
    tr_scr->base.texture_create = trace_screen_texture_create;
    tr_scr->base.texture_blanket = trace_screen_texture_blanket;
    tr_scr->base.texture_destroy = trace_screen_texture_destroy;