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drm/xe/pf: Don't attempt to process FAST_REQ or EVENT relays

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Currently defined VF/PF relay actions use regular REQUEST messages
only and the PF shouldn't attempt to handle FAST_REQUEST nor EVENT
messages as this would result in breaking the VFPF ABI protocol
and also might trigger an assert on the PF side.

Fixes: 98e6280592 ("drm/xe/pf: Add SR-IOV GuC Relay PF services")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Link: https://patch.msgid.link/20260527183735.22616-1-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2026-05-27 20:37:35 +02:00
parent b623bd790d
commit 1714d360fc
1 changed files with 9 additions and 4 deletions
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13
drivers/gpu/drm/xe/xe_guc_relay.c
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@@ -689,12 +689,17 @@ static int relay_action_handler(struct xe_guc_relay *relay, u32 origin,
return relay_testloop_action_handler(relay, origin, msg, len, response, size);
type = FIELD_GET(GUC_HXG_MSG_0_TYPE, msg[0]);
relay_assert(relay, guc_hxg_type_is_action(type));
if (IS_SRIOV_PF(relay_to_xe(relay)))
ret = xe_gt_sriov_pf_service_process_request(gt, origin, msg, len, response, size);
else
if (IS_SRIOV_PF(relay_to_xe(relay))) {
if (type == GUC_HXG_TYPE_REQUEST)
ret = xe_gt_sriov_pf_service_process_request(gt, origin, msg, len,
response, size);
else
ret = -EOPNOTSUPP;
} else {
ret = -EOPNOTSUPP;
}
if (type == GUC_HXG_TYPE_EVENT)
relay_assert(relay, ret <= 0);