nvfx: new 2D: rewrite transfer code to use staging transfers

This greatly simplifies the code, and avoids ad-hoc copy code.

Also, these new transfers work for buffers too, even though they
are still used for miptrees only.

1 files changed, 52 insertions, 163 deletions

diff --git a/src/gallium/drivers/nvfx/nvfx_transfer.c b/src/gallium/drivers/nvfx/nvfx_transfer.c
index 957e586f81d..e9c3dd7e551 100644
--- a/src/gallium/drivers/nvfx/nvfx_transfer.c
+++ b/src/gallium/drivers/nvfx/nvfx_transfer.c
@@ -4,199 +4,88 @@
 #include "util/u_format.h"
 #include "util/u_memory.h"
 #include "util/u_math.h"
-#include "nouveau/nouveau_winsys.h"
+#include "util/u_staging.h"
 #include "nvfx_context.h"
 #include "nvfx_screen.h"
 #include "nvfx_state.h"
 #include "nvfx_resource.h"
 #include "nvfx_transfer.h"
 
-struct nvfx_transfer {
-	struct pipe_transfer base;
-	struct pipe_surface *surface;
-	boolean direct;
-};
-
-static void
-nvfx_compatible_transfer_tex(struct pipe_resource *pt, unsigned width, unsigned height,
-			     unsigned bind,
-                             struct pipe_resource *template)
-{
-	memset(template, 0, sizeof(struct pipe_resource));
-	template->target = pt->target;
-	template->format = pt->format;
-	template->width0 = width;
-	template->height0 = height;
-	template->depth0 = 1;
-	template->last_level = 0;
-	template->nr_samples = pt->nr_samples;
-	template->bind = bind;
-	template->usage = PIPE_USAGE_DYNAMIC;
-	template->flags = NVFX_RESOURCE_FLAG_LINEAR;
-}
-
-
-static unsigned nvfx_transfer_bind_flags( unsigned transfer_usage )
+struct nvfx_staging_transfer
 {
-	unsigned bind = 0;
+	struct util_staging_transfer base;
 
-#if 0
-	if (transfer_usage & PIPE_TRANSFER_WRITE)
-		bind |= PIPE_BIND_BLIT_SOURCE;
-
-	if (transfer_usage & PIPE_TRANSFER_READ)
-		bind |= PIPE_BIND_BLIT_DESTINATION;
-#endif
-
-	return bind;
-}
+	unsigned offset;
+	unsigned map_count;
+};
 
 struct pipe_transfer *
-nvfx_miptree_transfer_new(struct pipe_context *pipe,
+nvfx_transfer_new(struct pipe_context *pipe,
 			  struct pipe_resource *pt,
 			  struct pipe_subresource sr,
 			  unsigned usage,
 			  const struct pipe_box *box)
 {
-	struct pipe_screen *pscreen = pipe->screen;
-	struct nvfx_transfer *tx;
-	struct pipe_resource tx_tex_template, *tx_tex;
-	unsigned bind = nvfx_transfer_bind_flags(usage);
+	struct nvfx_staging_transfer* tx;
+	bool direct = !nvfx_resource_on_gpu(pt) && pt->flags & NVFX_RESOURCE_FLAG_LINEAR;
 
-	tx = CALLOC_STRUCT(nvfx_transfer);
-	if (!tx)
+	tx = CALLOC_STRUCT(nvfx_staging_transfer);
+	if(!tx)
 		return NULL;
 
-	/* Don't handle 3D transfers yet.
-	 */
-	assert(box->depth == 1);
-
-	pipe_resource_reference(&tx->base.resource, pt);
-	tx->base.sr = sr;
-	tx->base.stride = nvfx_subresource_pitch(pt, sr.level);
-	tx->base.slice_stride = tx->base.stride * u_minify(pt->height0, sr.level);
-	tx->base.usage = usage;
-	tx->base.box = *box;
+	util_staging_transfer_init(pipe, pt, sr, usage, box, direct, tx);
 
-	/* Direct access to texture */
-	if ((util_format_is_s3tc(pt->format) || pt->usage & PIPE_USAGE_DYNAMIC) &&
-	    pt->flags & NVFX_RESOURCE_FLAG_LINEAR)
+	if(pt->target == PIPE_BUFFER)
 	{
-		tx->direct = true;
-
-		/* XXX: just call the internal nvfx function.  
-		 */
-		tx->surface = pscreen->get_tex_surface(pscreen, pt,
-	                                               sr.face, sr.level,
-						       box->z,
-	                                               bind);
-		return &tx->base;
+		tx->base.base.slice_stride = tx->base.base.stride = ((struct nvfx_resource*)tx->base.staging_resource)->bo->size;
+		if(direct)
+			tx->offset = util_format_get_stride(pt->format, box->x);
+		else
+			tx->offset = 0;
 	}
-
-	tx->direct = false;
-
-	nvfx_compatible_transfer_tex(pt, box->width, box->height, bind, &tx_tex_template);
-
-	tx_tex = pscreen->resource_create(pscreen, &tx_tex_template);
-	if (!tx_tex)
+	else
 	{
-		FREE(tx);
-		return NULL;
+		if(direct)
+		{
+			tx->base.base.stride = nvfx_subresource_pitch(pt, sr.level);
+			tx->base.base.slice_stride = tx->base.base.stride * u_minify(pt->height0, sr.level);
+			tx->offset = nvfx_subresource_offset(pt, sr.face, sr.level, box->z)
+				+ util_format_get_2d_size(pt->format, tx->base.base.stride, box->y)
+				+ util_format_get_stride(pt->format, box->x);
+		}
+		else
+		{
+			tx->base.base.stride = nvfx_subresource_pitch(tx->base.staging_resource, 0);
+			tx->base.base.slice_stride = tx->base.base.stride * tx->base.staging_resource->height0;
+			tx->offset = 0;
+		}
+
+		assert(tx->base.base.stride);
+
+		return &tx->base.base;
 	}
-
-	tx->base.stride = ((struct nvfx_miptree*)tx_tex)->linear_pitch;
-	tx->base.slice_stride = tx->base.stride * box->height;
-
-	tx->surface = pscreen->get_tex_surface(pscreen, tx_tex,
-	                                       0, 0, 0,
-	                                       bind);
-
-	pipe_resource_reference(&tx_tex, NULL);
-
-	if (!tx->surface)
-	{
-		pipe_surface_reference(&tx->surface, NULL);
-		FREE(tx);
-		return NULL;
-	}
-
-	if (usage & PIPE_TRANSFER_READ) {
-		struct nvfx_screen *nvscreen = nvfx_screen(pscreen);
-		struct pipe_surface *src;
-
-		src = pscreen->get_tex_surface(pscreen, pt,
-	                                       sr.face, sr.level, box->z,
-	                                       0 /*PIPE_BIND_BLIT_SOURCE*/);
-
-		/* TODO: Check if SIFM can deal with x,y,w,h when swizzling */
-		/* TODO: Check if SIFM can un-swizzle */
-		nvscreen->eng2d->copy(nvscreen->eng2d,
-		                      tx->surface, 0, 0,
-		                      src,
-				      box->x, box->y,
-		                      box->width, box->height);
-
-		pipe_surface_reference(&src, NULL);
-	}
-
-	return &tx->base;
-}
-
-void
-nvfx_miptree_transfer_del(struct pipe_context *pipe,
-			  struct pipe_transfer *ptx)
-{
-	struct nvfx_transfer *tx = (struct nvfx_transfer *)ptx;
-
-	if (!tx->direct && (ptx->usage & PIPE_TRANSFER_WRITE)) {
-		struct pipe_screen *pscreen = pipe->screen;
-		struct nvfx_screen *nvscreen = nvfx_screen(pscreen);
-		struct pipe_surface *dst;
-
-		dst = pscreen->get_tex_surface(pscreen,
-					       ptx->resource,
-	                                       ptx->sr.face,
-					       ptx->sr.level,
-					       ptx->box.z,
-	                                       0 /*PIPE_BIND_BLIT_DESTINATION*/);
-
-		/* TODO: Check if SIFM can deal with x,y,w,h when swizzling */
-		nvscreen->eng2d->copy(nvscreen->eng2d,
-		                      dst, ptx->box.x, ptx->box.y,
-		                      tx->surface, 0, 0,
-		                      ptx->box.width, ptx->box.height);
-
-		pipe_surface_reference(&dst, NULL);
-	}
-
-	pipe_surface_reference(&tx->surface, NULL);
-	pipe_resource_reference(&ptx->resource, NULL);
-	FREE(ptx);
 }
 
 void *
-nvfx_miptree_transfer_map(struct pipe_context *pipe, struct pipe_transfer *ptx)
+nvfx_transfer_map(struct pipe_context *pipe, struct pipe_transfer *ptx)
 {
-	struct nvfx_transfer *tx = (struct nvfx_transfer *)ptx;
-	struct nv04_surface *ns = (struct nv04_surface *)tx->surface;
-	struct nvfx_miptree *mt = (struct nvfx_miptree *)tx->surface->texture;
-
-	uint8_t *map = nouveau_screen_bo_map(pipe->screen, mt->base.bo,
-					     nouveau_screen_transfer_flags(ptx->usage));
-
-	if(!tx->direct)
-		return map + ns->base.offset;
-	else
-		return map + ns->base.offset
-		+ util_format_get_2d_size(ns->base.format, ns->pitch, ptx->box.y)
-		+ util_format_get_stride(ptx->resource->format, ptx->box.x);
+	struct nvfx_staging_transfer *tx = (struct nvfx_staging_transfer *)ptx;
+	if(!ptx->data)
+	{
+		struct nvfx_miptree *mt = (struct nvfx_miptree *)tx->base.staging_resource;
+		uint8_t *map = nouveau_screen_bo_map(pipe->screen, mt->base.bo, nouveau_screen_transfer_flags(ptx->usage));
+		ptx->data = map + tx->offset;
+	}
+	++tx->map_count;
+	return ptx->data;
 }
 
 void
-nvfx_miptree_transfer_unmap(struct pipe_context *pipe, struct pipe_transfer *ptx)
+nvfx_transfer_unmap(struct pipe_context *pipe, struct pipe_transfer *ptx)
 {
-	struct nvfx_transfer *tx = (struct nvfx_transfer *)ptx;
-	struct nvfx_miptree *mt = (struct nvfx_miptree *)tx->surface->texture;
+	struct nvfx_staging_transfer *tx = (struct nvfx_staging_transfer *)ptx;
+	struct nvfx_miptree *mt = (struct nvfx_miptree *)tx->base.staging_resource;
 
-	nouveau_screen_bo_unmap(pipe->screen, mt->base.bo);
+	if(!--tx->map_count)
+		nouveau_screen_bo_unmap(pipe->screen, mt->base.bo);
 }