if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV)) { struct drm_printer p = xe_gt_dbg_printer(gt);
xe_gt_sriov_pf_service_print_runtime(gt, &p);
}
}
/** * xe_gt_sriov_pf_service_init - Early initialization of the GT SR-IOV PF services. * @gt: the &xe_gt to initialize * * Performs early initialization of the GT SR-IOV PF services, including preparation * of the runtime info that will be shared with VFs. * * This function can only be called on PF.
*/ int xe_gt_sriov_pf_service_init(struct xe_gt *gt)
{ int err;
err = pf_alloc_runtime_info(gt); if (unlikely(err)) goto failed;
return 0;
failed:
xe_gt_sriov_err(gt, "Failed to initialize service (%pe)\n", ERR_PTR(err)); return err;
}
/** * xe_gt_sriov_pf_service_update - Update PF SR-IOV services. * @gt: the &xe_gt to update * * Updates runtime data shared with VFs. * * This function can be called more than once. * This function can only be called on PF.
*/ void xe_gt_sriov_pf_service_update(struct xe_gt *gt)
{
pf_prepare_runtime_info(gt);
}
/* Return: length of the response message or a negative error code on failure. */ staticint pf_process_handshake_msg(struct xe_gt *gt, u32 origin, const u32 *request, u32 len, u32 *response, u32 size)
{
u32 wanted_major, wanted_minor;
u32 major, minor;
u32 mbz; int err;
if (unlikely(len != VF2PF_HANDSHAKE_REQUEST_MSG_LEN)) return -EMSGSIZE;
mbz = FIELD_GET(VF2PF_HANDSHAKE_REQUEST_MSG_0_MBZ, request[0]); if (unlikely(mbz)) return -EPFNOSUPPORT;
return VF2PF_QUERY_RUNTIME_RESPONSE_MSG_MIN_LEN + ret * hxg_sizeof(struct reg_data);
}
/** * xe_gt_sriov_pf_service_process_request - Service GT level SR-IOV request message from the VF. * @gt: the &xe_gt that provides the service * @origin: VF number that is requesting the service * @msg: request message * @msg_len: length of the request message (in dwords) * @response: placeholder for the response message * @resp_size: length of the response message buffer (in dwords) * * This function processes `Relay Message`_ request from the VF. * * Return: length of the response message or a negative error code on failure.
*/ int xe_gt_sriov_pf_service_process_request(struct xe_gt *gt, u32 origin, const u32 *msg, u32 msg_len,
u32 *response, u32 resp_size)
{
u32 action, data __maybe_unused; int ret;
action = FIELD_GET(GUC_HXG_REQUEST_MSG_0_ACTION, msg[0]);
data = FIELD_GET(GUC_HXG_REQUEST_MSG_0_DATA0, msg[0]);
xe_gt_sriov_dbg_verbose(gt, "service action %#x:%u from VF%u\n",
action, data, origin);
switch (action) { case GUC_RELAY_ACTION_VF2PF_HANDSHAKE:
ret = pf_process_handshake_msg(gt, origin, msg, msg_len, response, resp_size); break; case GUC_RELAY_ACTION_VF2PF_QUERY_RUNTIME:
ret = pf_process_runtime_query_msg(gt, origin, msg, msg_len, response, resp_size); break; default:
ret = -EOPNOTSUPP; break;
}
return ret;
}
/** * xe_gt_sriov_pf_service_print_runtime - Print PF runtime data shared with VFs. * @gt: the &xe_gt * @p: the &drm_printer * * This function is for PF use only.
*/ int xe_gt_sriov_pf_service_print_runtime(struct xe_gt *gt, struct drm_printer *p)
{ conststruct xe_reg *regs; unsignedint size;
u32 *values;
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