drm/xe/guc: Do not assert CTB state while sending MMIO

During VF post-migration recovery, MMIO communication channel to GuC
is used, despite CTB channel being enabled. This behavior is rooted
in the save-restore architecture specification.

Therefore, a VF driver cannot assert that CTB is disabled while sending
MMIO messages to GuC. Such assertion needs to be PF only, or be removed.

This patch simply removes the assertion.

Signed-off-by: Tomasz Lis <tomasz.lis@intel.com>
Suggested-by: Michał Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241107151357.1623733-2-tomasz.lis@intel.com

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 7224593c9ce9b924eb64de2730c6ee0a1c650ddd..df1ba94cf4ca3820a710d5533b0b3a941c24df98 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -945,7 +945,6 @@ int xe_guc_mmio_send_recv(struct xe_guc *guc, const u32 *request,
 
        BUILD_BUG_ON(VF_SW_FLAG_COUNT != MED_VF_SW_FLAG_COUNT);
 
-       xe_assert(xe, !xe_guc_ct_enabled(&guc->ct));
        xe_assert(xe, len);
        xe_assert(xe, len <= VF_SW_FLAG_COUNT);
        xe_assert(xe, len <= MED_VF_SW_FLAG_COUNT);