radeonsi: add a debug flag to zero vram allocations

This allows to avoid having to see garbage in Dying Light loading screen
at least, which probably expects Windows/NV behavior of all allocations
being zeroed by default.

Analogous to radv flag with the same name.

Reviewed-by: Marek Olšák <[email protected]>

5 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 1e7c9916a8f..8f16b2bf8e6 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -82,6 +82,7 @@ static const struct debug_named_value debug_options[] = {
 	{ "nowc", DBG(NO_WC), "Disable GTT write combining" },
 	{ "check_vm", DBG(CHECK_VM), "Check VM faults and dump debug info." },
 	{ "reserve_vmid", DBG(RESERVE_VMID), "Force VMID reservation per context." },
+	{ "zerovram", DBG(ZERO_VRAM), "Clear VRAM allocations." },
 
 	/* 3D engine options: */
 	{ "switch_on_eop", DBG(SWITCH_ON_EOP), "Program WD/IA to switch on end-of-packet." },
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h
index 61109477d44..d73ee600443 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -141,6 +141,7 @@ enum {
 	DBG_NO_WC,
 	DBG_CHECK_VM,
 	DBG_RESERVE_VMID,
+	DBG_ZERO_VRAM,
 
 	/* 3D engine options: */
 	DBG_SWITCH_ON_EOP,
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
index cd75fe83488..e3d56613dfa 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c
@@ -428,6 +428,9 @@ static struct amdgpu_winsys_bo *amdgpu_create_bo(struct amdgpu_winsys *ws,
    if (flags & RADEON_FLAG_NO_INTERPROCESS_SHARING &&
        ws->info.has_local_buffers)
       request.flags |= AMDGPU_GEM_CREATE_VM_ALWAYS_VALID;
+   if (ws->zero_all_vram_allocs &&
+       (request.preferred_heap & AMDGPU_GEM_DOMAIN_VRAM))
+      request.flags |= AMDGPU_GEM_CREATE_VRAM_CLEARED;
 
    r = amdgpu_bo_alloc(ws->dev, &request, &buf_handle);
    if (r) {
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
index 69202dc7e77..d60b3640f61 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.c
@@ -62,6 +62,7 @@ static bool do_winsys_init(struct amdgpu_winsys *ws, int fd)
    ws->check_vm = strstr(debug_get_option("R600_DEBUG", ""), "check_vm") != NULL;
    ws->debug_all_bos = debug_get_option_all_bos();
    ws->reserve_vmid = strstr(debug_get_option("R600_DEBUG", ""), "reserve_vmid") != NULL;
+   ws->zero_all_vram_allocs = strstr(debug_get_option("R600_DEBUG", ""), "zerovram") != NULL;
 
    return true;
 
diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.h b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.h
index a6784e85c02..8079255e4cf 100644
--- a/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.h
+++ b/src/gallium/winsys/amdgpu/drm/amdgpu_winsys.h
@@ -79,6 +79,7 @@ struct amdgpu_winsys {
    bool check_vm;
    bool debug_all_bos;
    bool reserve_vmid;
+   bool zero_all_vram_allocs;
 
    /* List of all allocated buffers */
    simple_mtx_t global_bo_list_lock;