From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753955AbbCKNaR (ORCPT ); Wed, 11 Mar 2015 09:30:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53082 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753843AbbCKNaC (ORCPT ); Wed, 11 Mar 2015 09:30:02 -0400 From: Vitaly Kuznetsov To: "K. Y. Srinivasan" , devel@linuxdriverproject.org Cc: Haiyang Zhang , linux-kernel@vger.kernel.org, Dexuan Cui , Radim Krcmar , Greg Kroah-Hartman , linux-api@vger.kernel.org Subject: [PATCH RFCv2 08/21] Drivers: hv: util: introduce state machine for util drivers Date: Wed, 11 Mar 2015 14:29:21 +0100 Message-Id: <1426080574-9011-9-git-send-email-vkuznets@redhat.com> In-Reply-To: <1426080574-9011-1-git-send-email-vkuznets@redhat.com> References: <1426080574-9011-1-git-send-email-vkuznets@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org KVP/VSS/FCOPY drivers work in fully serialized mode: we wait till userspace daemon registers, wait for a message from the host, send this message to the daemon, get the reply, send it back to host, wait for another message. Introduce enum hvutil_device_state to represend this state in all 3 drivers. Signed-off-by: Vitaly Kuznetsov --- drivers/hv/hyperv_vmbus.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 177dbec..62efcce 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -724,4 +724,13 @@ static inline void hv_poll_channel(struct vmbus_channel *channel, cb(channel); } +enum hvutil_device_state { + HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */ + HVUTIL_READY, /* userspace is registered */ + HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */ + HVUTIL_USERSPACE_REQ, /* request to userspace was sent */ + HVUTIL_USERSPACE_RECV, /* reply from userspace was received */ + HVUTIL_DEVICE_DYING, /* driver unload is in progress */ +}; + #endif /* _HYPERV_VMBUS_H */ -- 1.9.3