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drm/xe/guc: Treat non-response message after BUSY as unexpected

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Once GuC replied with GUC_HXG_TYPE_NO_RESPONSE_BUSY message then
we may expect that only RESPONSE_SUCCESS or FAILURE message will
be sent, anything else is a violation of the HXG protocol.

Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20240111154838.541-1-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
This commit is contained in:
Michal Wajdeczko 2024-01-11 16:48:38 +01:00
parent 88cbf85020
commit 3c01e01214
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/xe/xe_guc.c
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@ -731,8 +731,12 @@ int xe_guc_mmio_send_recv(struct xe_guc *guc, const u32 *request,
if (unlikely(FIELD_GET(GUC_HXG_MSG_0_ORIGIN, header) !=
GUC_HXG_ORIGIN_GUC))
goto proto;
if (unlikely(ret))
if (unlikely(ret)) {
if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) !=
GUC_HXG_TYPE_NO_RESPONSE_BUSY)
goto proto;
goto timeout;
}
}
if (FIELD_GET(GUC_HXG_MSG_0_TYPE, header) ==