From afbd68378a4d052c4ff02cac3cd4739d7fd13336 Mon Sep 17 00:00:00 2001 From: Erik Faye-Lund Date: Thu, 4 Apr 2019 17:27:52 +0200 Subject: [PATCH] virgl: support write-back with staged transfers We currently don't support writing to resources that uses a temporary staging-resource to resolve the pixels. If a write-bit was set, we forgot to perform a blit back to the old resource, followed by trying to update the wrong resource, which lacks backing-storage. The end-result would be that nothing useful happened. This approach also fixes a few smaller bugs, like using the wrong box (without x y and z zeroed out), which means a partial update of a multisampled texture could result in the wrong part of the texture being updated. Signed-off-by: Erik Faye-Lund Reviewed-by: Gurchetan Singh --- src/gallium/drivers/virgl/virgl_resource.h | 2 +- src/gallium/drivers/virgl/virgl_texture.c | 69 +++++++++++++++++++++--------- 2 files changed, 49 insertions(+), 22 deletions(-) diff --git a/src/gallium/drivers/virgl/virgl_resource.h b/src/gallium/drivers/virgl/virgl_resource.h index f127d45..abe8578 100644 --- a/src/gallium/drivers/virgl/virgl_resource.h +++ b/src/gallium/drivers/virgl/virgl_resource.h @@ -57,7 +57,7 @@ struct virgl_transfer { uint32_t offset, l_stride; struct util_range range; struct list_head queue_link; - struct virgl_resource *resolve_tmp; + struct pipe_transfer *resolve_transfer; }; void virgl_resource_destroy(struct pipe_screen *screen, diff --git a/src/gallium/drivers/virgl/virgl_texture.c b/src/gallium/drivers/virgl/virgl_texture.c index 5a7ce71..e0c152d 100644 --- a/src/gallium/drivers/virgl/virgl_texture.c +++ b/src/gallium/drivers/virgl/virgl_texture.c @@ -125,7 +125,7 @@ static void *texture_transfer_map_plain(struct pipe_context *ctx, trans = virgl_resource_create_transfer(&vctx->transfer_pool, resource, &vtex->metadata, level, usage, box); - trans->resolve_tmp = NULL; + trans->resolve_transfer = NULL; assert(resource->nr_samples <= 1); @@ -156,7 +156,16 @@ static void *texture_transfer_map_resolve(struct pipe_context *ctx, const struct pipe_box *box, struct pipe_transfer **transfer) { + struct virgl_context *vctx = virgl_context(ctx); struct pipe_resource templ, *resolve_tmp; + struct virgl_transfer *trans; + + trans = virgl_resource_create_transfer(&vctx->transfer_pool, resource, + &virgl_resource(resource)->metadata, + level, usage, box); + if (!trans) + return NULL; + virgl_init_temp_resource_from_box(&templ, resource, box, level, 0); resolve_tmp = ctx->screen->resource_create(ctx->screen, &templ); @@ -169,21 +178,20 @@ static void *texture_transfer_map_resolve(struct pipe_context *ctx, virgl_copy_region_with_blit(ctx, resolve_tmp, 0, &dst_box, resource, level, box); ctx->flush(ctx, NULL, 0); - void *ptr = texture_transfer_map_plain(ctx, resolve_tmp, 0, usage, box, - transfer); - if (!ptr) { - pipe_resource_reference(&resolve_tmp, NULL); - return NULL; - } - - virgl_transfer(*transfer)->resolve_tmp = virgl_resource(resolve_tmp); - - struct virgl_resource_metadata *data = &virgl_resource(resolve_tmp)->metadata; - assert((*transfer)->stride == data->stride[0]); - assert((*transfer)->layer_stride == data->layer_stride[0]); - assert(virgl_transfer(*transfer)->offset == 0); + void *ptr = texture_transfer_map_plain(ctx, resolve_tmp, 0, usage, &dst_box, + &trans->resolve_transfer); + if (!ptr) + goto fail; + *transfer = &trans->base; + trans->base.stride = trans->resolve_transfer->stride; + trans->base.layer_stride = trans->resolve_transfer->layer_stride; return ptr; + +fail: + pipe_resource_reference(&resolve_tmp, NULL); + virgl_resource_destroy_transfer(&vctx->transfer_pool, trans); + return NULL; } static void *virgl_texture_transfer_map(struct pipe_context *ctx, @@ -200,26 +208,45 @@ static void *virgl_texture_transfer_map(struct pipe_context *ctx, return texture_transfer_map_plain(ctx, resource, level, usage, box, transfer); } +static void flush_data(struct pipe_context *ctx, + struct virgl_transfer *trans, + const struct pipe_box *box) +{ + struct virgl_winsys *vws = virgl_screen(ctx->screen)->vws; + vws->transfer_put(vws, virgl_resource(trans->base.resource)->hw_res, box, + trans->base.stride, trans->l_stride, trans->offset, + trans->base.level); +} + static void virgl_texture_transfer_unmap(struct pipe_context *ctx, struct pipe_transfer *transfer) { struct virgl_context *vctx = virgl_context(ctx); struct virgl_transfer *trans = virgl_transfer(transfer); - struct virgl_resource *vtex = virgl_resource(transfer->resource); bool queue_unmap = false; if (transfer->usage & PIPE_TRANSFER_WRITE && (transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT) == 0) { - if (trans->resolve_tmp) { - struct virgl_winsys *vws = virgl_screen(ctx->screen)->vws; - vws->transfer_put(vws, vtex->hw_res, &transfer->box, - trans->base.stride, trans->l_stride, - trans->offset, transfer->level); + + if (trans->resolve_transfer) { + flush_data(ctx, virgl_transfer(trans->resolve_transfer), + &trans->resolve_transfer->box); + + virgl_copy_region_with_blit(ctx, + trans->base.resource, trans->base.level, + &transfer->box, + trans->resolve_transfer->resource, 0, + &trans->resolve_transfer->box); + ctx->flush(ctx, NULL, 0); } else queue_unmap = true; } - pipe_resource_reference((struct pipe_resource **)&trans->resolve_tmp, NULL); + if (trans->resolve_transfer) { + pipe_resource_reference(&trans->resolve_transfer->resource, NULL); + virgl_resource_destroy_transfer(&vctx->transfer_pool, + virgl_transfer(trans->resolve_transfer)); + } if (queue_unmap) virgl_transfer_queue_unmap(&vctx->queue, trans); -- 2.7.4