nouveau: rewrite winsys in terms of drm_api, support dri2 state tracker

drm_api is a set of hooks used by the dri2 state tracker, this wraps our
dri1 code around the same set of hooks.

Currently the dri2 build will produce nouveau_dri2.so which you'll need
to install as nouveau_dri.so if you wish to try it.  The dri2 state
tracker doesn't make it easy for a driver to support both paths in the
same binary.

1 files changed, 118 insertions, 0 deletions

diff --git a/src/gallium/winsys/drm/nouveau/dri/nouveau_context.c b/src/gallium/winsys/drm/nouveau/dri/nouveau_context.c
new file mode 100644
index 0000000000..deb6ffcff1
--- /dev/null
+++ b/src/gallium/winsys/drm/nouveau/dri/nouveau_context.c
@@ -0,0 +1,118 @@
+#include <main/glheader.h>
+#include <glapi/glthread.h>
+#include <GL/internal/glcore.h>
+#include <utils.h>
+
+#include <state_tracker/st_public.h>
+#include <state_tracker/st_context.h>
+#include <state_tracker/drm_api.h>
+#include <pipe/p_defines.h>
+#include <pipe/p_context.h>
+#include <pipe/p_screen.h>
+
+#include "nouveau_context.h"
+#include "nouveau_screen.h"
+
+#include "nouveau_drmif.h"
+
+GLboolean
+nouveau_context_create(const __GLcontextModes *glVis,
+		       __DRIcontextPrivate *driContextPriv,
+		       void *sharedContextPrivate)
+{
+	__DRIscreenPrivate *driScrnPriv = driContextPriv->driScreenPriv;
+	struct nouveau_screen  *nv_screen = driScrnPriv->private;
+	struct nouveau_context *nv;
+	struct pipe_context *pipe;
+	struct st_context *st_share = NULL;
+
+	if (sharedContextPrivate)
+		st_share = ((struct nouveau_context *)sharedContextPrivate)->st;
+
+	nv = CALLOC_STRUCT(nouveau_context);
+	if (!nv)
+		return GL_FALSE;
+
+	{
+		struct nouveau_device_priv *nvdev =
+			nouveau_device(nv_screen->device);
+
+		nvdev->ctx  = driContextPriv->hHWContext;
+		nvdev->lock = (drmLock *)&driScrnPriv->pSAREA->lock;
+	}
+
+	pipe = drm_api_hooks.create_context(nv_screen->pscreen);
+	if (!pipe) {
+		FREE(nv);
+		return GL_FALSE;
+	}
+	pipe->priv = nv;
+
+	driContextPriv->driverPrivate = nv;
+	nv->dri_screen = driScrnPriv;
+
+	driParseConfigFiles(&nv->dri_option_cache, &nv_screen->option_cache,
+			    nv->dri_screen->myNum, "nouveau");
+
+	nv->st = st_create_context(pipe, glVis, st_share);
+	return GL_TRUE;
+}
+
+void
+nouveau_context_destroy(__DRIcontextPrivate *driContextPriv)
+{
+	struct nouveau_context *nv = driContextPriv->driverPrivate;
+
+	assert(nv);
+
+	st_finish(nv->st);
+	st_destroy_context(nv->st);
+
+	FREE(nv);
+}
+
+GLboolean
+nouveau_context_bind(__DRIcontextPrivate *driContextPriv,
+		     __DRIdrawablePrivate *driDrawPriv,
+		     __DRIdrawablePrivate *driReadPriv)
+{
+	struct nouveau_context *nv;
+	struct nouveau_framebuffer *draw, *read;
+
+	if (!driContextPriv) {
+		st_make_current(NULL, NULL, NULL);
+		return GL_TRUE;
+	}
+
+	nv = driContextPriv->driverPrivate;
+	draw = driDrawPriv->driverPrivate;
+	read = driReadPriv->driverPrivate;
+
+	st_make_current(nv->st, draw->stfb, read->stfb);
+
+	if ((nv->dri_drawable != driDrawPriv) ||
+	    (nv->last_stamp != driDrawPriv->lastStamp)) {
+		nv->dri_drawable = driDrawPriv;
+		st_resize_framebuffer(draw->stfb, driDrawPriv->w,
+				      driDrawPriv->h);
+		nv->last_stamp = driDrawPriv->lastStamp;
+	}
+
+	if (driDrawPriv != driReadPriv) {
+		st_resize_framebuffer(read->stfb, driReadPriv->w,
+				      driReadPriv->h);
+	}
+
+	return GL_TRUE;
+}
+
+GLboolean
+nouveau_context_unbind(__DRIcontextPrivate *driContextPriv)
+{
+	struct nouveau_context *nv = driContextPriv->driverPrivate;
+	(void)nv;
+
+	st_flush(nv->st, 0, NULL);
+	return GL_TRUE;
+}
+