nouveau: Use swizzled textures & render targets on nv40 when possible.

5 files changed, 130 insertions, 10 deletions

diff --git a/src/gallium/drivers/nv40/nv40_fragtex.c b/src/gallium/drivers/nv40/nv40_fragtex.c
index 566d5a8d5ba..0227d22620d 100644
--- a/src/gallium/drivers/nv40/nv40_fragtex.c
+++ b/src/gallium/drivers/nv40/nv40_fragtex.c
@@ -66,7 +66,6 @@ nv40_fragtex_build(struct nv40_context *nv40, int unit)
 	struct nv40_texture_format *tf;
 	struct nouveau_stateobj *so;
 	uint32_t txf, txs, txp;
-	int swizzled = 0; /*XXX: implement in region code? */
 	unsigned tex_flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_RD;
 
 	tf = nv40_fragtex_format(pt->format);
@@ -98,7 +97,7 @@ nv40_fragtex_build(struct nv40_context *nv40, int unit)
 		return NULL;
 	}
 
-	if (swizzled) {
+	if (!(pt->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)) {
 		txp = 0;
 	} else {
 		txp  = nv40mt->level[0].pitch;
diff --git a/src/gallium/drivers/nv40/nv40_miptree.c b/src/gallium/drivers/nv40/nv40_miptree.c
index f321b721492..6516bff4b81 100644
--- a/src/gallium/drivers/nv40/nv40_miptree.c
+++ b/src/gallium/drivers/nv40/nv40_miptree.c
@@ -65,9 +65,32 @@ nv40_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
 	mt->base = *pt;
 	mt->base.refcount = 1;
 	mt->base.screen = pscreen;
+	mt->shadow_tex = NULL;
+	mt->shadow_surface = NULL;
 
 	nv40_miptree_layout(mt);
 
+	/* Swizzled textures must be POT */
+	if (pt->width[0] & (pt->width[0] - 1) ||
+	    pt->height[0] & (pt->height[0] - 1))
+		mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
+	else
+	if (pt->tex_usage & (PIPE_TEXTURE_USAGE_PRIMARY |
+	                     PIPE_TEXTURE_USAGE_DISPLAY_TARGET))
+		mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
+	else {
+		switch (pt->format) {
+		/* TODO: Figure out which formats can be swizzled */
+		case PIPE_FORMAT_A8R8G8B8_UNORM:
+		case PIPE_FORMAT_X8R8G8B8_UNORM:
+		/* XXX: Re-enable when SIFM size limits are fixed */
+		/*case PIPE_FORMAT_R16_SNORM:*/
+			break;
+		default:
+			mt->base.tex_usage |= NOUVEAU_TEXTURE_USAGE_LINEAR;
+		}
+	}
+
 	mt->buffer = ws->buffer_create(ws, 256,
 				       PIPE_BUFFER_USAGE_PIXEL |
 				       NOUVEAU_BUFFER_USAGE_TEXTURE,
@@ -91,13 +114,18 @@ nv40_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
 	if (--pt->refcount)
 		return;
 
-
 	pipe_buffer_reference(pscreen, &mt->buffer, NULL);
 	for (l = 0; l <= pt->last_level; l++) {
 		if (mt->level[l].image_offset)
 			FREE(mt->level[l].image_offset);
 	}
 
+	if (mt->shadow_tex) {
+		assert(mt->shadow_surface);
+		pscreen->tex_surface_release(pscreen, &mt->shadow_surface);
+		nv40_miptree_release(pscreen, &mt->shadow_tex);
+	}
+
 	FREE(mt);
 }
 
@@ -125,6 +153,9 @@ nv40_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
 	ps->status = PIPE_SURFACE_STATUS_DEFINED;
 	ps->refcount = 1;
 	ps->winsys = pscreen->winsys;
+	ps->face = face;
+	ps->level = level;
+	ps->zslice = zslice;
 
 	if (pt->target == PIPE_TEXTURE_CUBE) {
 		ps->offset = mt->level[level].image_offset[face];
diff --git a/src/gallium/drivers/nv40/nv40_screen.c b/src/gallium/drivers/nv40/nv40_screen.c
index ada0238511d..25c78682961 100644
--- a/src/gallium/drivers/nv40/nv40_screen.c
+++ b/src/gallium/drivers/nv40/nv40_screen.c
@@ -137,22 +137,73 @@ static void *
 nv40_surface_map(struct pipe_screen *screen, struct pipe_surface *surface,
 		 unsigned flags )
 {
-	struct pipe_winsys *ws = screen->winsys;
-	void *map;
+	struct pipe_winsys	*ws = screen->winsys;
+	struct pipe_surface	*surface_to_map;
+	void			*map;
+
+	if (!(surface->texture->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)) {
+		struct nv40_miptree *mt = (struct nv40_miptree *)surface->texture;
+
+		if (!mt->shadow_tex) {
+			unsigned old_tex_usage = surface->texture->tex_usage;
+			surface->texture->tex_usage = NOUVEAU_TEXTURE_USAGE_LINEAR;
+			mt->shadow_tex = screen->texture_create(screen, surface->texture);
+			surface->texture->tex_usage = old_tex_usage;
+
+			assert(mt->shadow_tex->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR);
+			mt->shadow_surface = screen->get_tex_surface
+			(
+				screen, mt->shadow_tex,
+				surface->face, surface->level, surface->zslice,
+				surface->usage
+			);
+		}
+
+		surface_to_map = mt->shadow_surface;
+	}
+	else
+		surface_to_map = surface;
 
-	map = ws->buffer_map(ws, surface->buffer, flags);
+	assert(surface_to_map);
+
+	map = ws->buffer_map(ws, surface_to_map->buffer, flags);
 	if (!map)
 		return NULL;
 
-	return map + surface->offset;
+	return map + surface_to_map->offset;
 }
 
 static void
 nv40_surface_unmap(struct pipe_screen *screen, struct pipe_surface *surface)
 {
-	struct pipe_winsys *ws = screen->winsys;
+	struct pipe_winsys	*ws = screen->winsys;
+	struct pipe_surface	*surface_to_unmap;
+
+	/* TODO: Copy from shadow just before push buffer is flushed instead.
+	         There are probably some programs that map/unmap excessively
+	         before rendering. */
+	if (!(surface->texture->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)) {
+		struct nv40_miptree *mt = (struct nv40_miptree *)surface->texture;
+
+		assert(mt->shadow_tex);
 
-	ws->buffer_unmap(ws, surface->buffer);
+		surface_to_unmap = mt->shadow_surface;
+	}
+	else
+		surface_to_unmap = surface;
+
+	assert(surface_to_unmap);
+
+	ws->buffer_unmap(ws, surface_to_unmap->buffer);
+
+	if (surface_to_unmap != surface) {
+		struct nv40_screen *nvscreen = nv40_screen(screen);
+
+		nvscreen->nvws->surface_copy(nvscreen->nvws,
+		                             surface, 0, 0,
+		                             surface_to_unmap, 0, 0,
+		                             surface->width, surface->height);
+	}
 }
 
 static void
diff --git a/src/gallium/drivers/nv40/nv40_state.h b/src/gallium/drivers/nv40/nv40_state.h
index 8a9d8c8fdf6..9c55903ae30 100644
--- a/src/gallium/drivers/nv40/nv40_state.h
+++ b/src/gallium/drivers/nv40/nv40_state.h
@@ -79,6 +79,9 @@ struct nv40_miptree {
 	struct pipe_buffer *buffer;
 	uint total_size;
 
+	struct pipe_texture *shadow_tex;
+	struct pipe_surface *shadow_surface;
+
 	struct {
 		uint pitch;
 		uint *image_offset;
diff --git a/src/gallium/drivers/nv40/nv40_state_fb.c b/src/gallium/drivers/nv40/nv40_state_fb.c
index 0e4e60eaa75..f903b22ba09 100644
--- a/src/gallium/drivers/nv40/nv40_state_fb.c
+++ b/src/gallium/drivers/nv40/nv40_state_fb.c
@@ -1,5 +1,31 @@
 #include "nv40_context.h"
 
+static INLINE int log2i(int i)
+{
+	int r = 0;
+
+	if (i & 0xffff0000) {
+		i >>= 16;
+		r += 16;
+	}
+	if (i & 0x0000ff00) {
+		i >>= 8;
+		r += 8;
+	}
+	if (i & 0x000000f0) {
+		i >>= 4;
+		r += 4;
+	}
+	if (i & 0x0000000c) {
+		i >>= 2;
+		r += 2;
+	}
+	if (i & 0x00000002) {
+		r += 1;
+	}
+	return r;
+}
+
 static boolean
 nv40_state_framebuffer_validate(struct nv40_context *nv40)
 {
@@ -32,7 +58,17 @@ nv40_state_framebuffer_validate(struct nv40_context *nv40)
 		zeta = fb->zsbuf;
 	}
 
-	rt_format = NV40TCL_RT_FORMAT_TYPE_LINEAR;
+	if (!(rt[0]->texture->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)) {
+		assert(!(fb->width & (fb->width - 1)) && !(fb->height & (fb->height - 1)));
+		for (i = 1; i < fb->num_cbufs; i++)
+			assert(!(rt[i]->texture->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR));
+
+		rt_format = NV40TCL_RT_FORMAT_TYPE_SWIZZLED |
+		            log2i(fb->width) << NV40TCL_RT_FORMAT_LOG2_WIDTH_SHIFT |
+		            log2i(fb->height) << NV40TCL_RT_FORMAT_LOG2_HEIGHT_SHIFT;
+	}
+	else
+		rt_format = NV40TCL_RT_FORMAT_TYPE_LINEAR;
 
 	switch (colour_format) {
 	case PIPE_FORMAT_A8R8G8B8_UNORM: