nouveau: add valid range tracking to nouveau_buffer

This logic is borrowed from the radeon code. The transfer logic will
only get called for PIPE_BUFFER resources, so it shouldn't be necessary
to worry about them becoming render targets.

Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Christoph Bumiller <[email protected]>

2 files changed, 6 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_resource.c b/src/gallium/drivers/nouveau/nvc0/nvc0_resource.c
index 4e70903b538..12b5a025064 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_resource.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_resource.c
@@ -36,6 +36,8 @@ nvc0_surface_create(struct pipe_context *pipe,
                     struct pipe_resource *pres,
                     const struct pipe_surface *templ)
 {
+   /* surfaces are assumed to be miptrees all over the place. */
+   assert(pres->target != PIPE_BUFFER);
    if (unlikely(pres->target == PIPE_BUFFER))
       return nv50_surface_from_buffer(pipe, pres, templ);
    return nvc0_miptree_surface_new(pipe, pres, templ);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_state.c b/src/gallium/drivers/nouveau/nvc0/nvc0_state.c
index 0213a8e22ac..dec535532d8 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_state.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_state.c
@@ -992,6 +992,7 @@ nvc0_so_target_create(struct pipe_context *pipe,
                       struct pipe_resource *res,
                       unsigned offset, unsigned size)
 {
+   struct nv04_resource *buf = (struct nv04_resource *)res;
    struct nvc0_so_target *targ = MALLOC_STRUCT(nvc0_so_target);
    if (!targ)
       return NULL;
@@ -1010,6 +1011,9 @@ nvc0_so_target_create(struct pipe_context *pipe,
    pipe_resource_reference(&targ->pipe.buffer, res);
    pipe_reference_init(&targ->pipe.reference, 1);
 
+   assert(buf->base.target == PIPE_BUFFER);
+   util_range_add(&buf->valid_buffer_range, offset, offset + size);
+
    return &targ->pipe;
 }