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From: "K. Y. Srinivasan" <kys@microsoft.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
	devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com,
	vkuznets@redhat.com, jasowang@redhat.com
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Subject: [PATCH 08/21] Drivers: hv: util: introduce state machine for util drivers
Date: Sat, 11 Apr 2015 18:07:46 -0700	[thread overview]
Message-ID: <1428800879-25816-8-git-send-email-kys@microsoft.com> (raw)
In-Reply-To: <1428800879-25816-1-git-send-email-kys@microsoft.com>

From: Vitaly Kuznetsov <vkuznets@redhat.com>

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 <vkuznets@redhat.com>
Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
 drivers/hv/hyperv_vmbus.h |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 2f30456..138d663 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -755,4 +755,13 @@ 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 */
-- 
1.7.4.1


  parent reply	other threads:[~2015-04-11 23:50 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-12  1:07 [PATCH 00/21] Drivers: hv: utils: re-implement the kernel/userspace communication layer K. Y. Srinivasan
2015-04-12  1:07 ` [PATCH 01/21] Drivers: hv: util: move kvp/vss function declarations to hyperv_vmbus.h K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 02/21] Drivers: hv: kvp: reset kvp_context K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 03/21] Drivers: hv: kvp: move poll_channel() to hyperv_vmbus.h K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 04/21] Drivers: hv: fcopy: process deferred messages when we complete the transaction K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 05/21] Drivers: hv: vss: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 06/21] Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 07/21] Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work K. Y. Srinivasan
2015-04-12  1:07   ` K. Y. Srinivasan [this message]
2015-04-12  1:07   ` [PATCH 09/21] Drivers: hv: kvp: switch to using the hvutil_device_state state machine K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 10/21] Drivers: hv: vss: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 11/21] Drivers: hv: fcopy: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 12/21] Drivers: hv: fcopy: set .owner reference for file operations K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 13/21] Drivers: hv: util: introduce hv_utils_transport abstraction K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 14/21] Drivers: hv: vss: convert to hv_utils_transport K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 15/21] Drivers: hv: fcopy: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 16/21] Drivers: hv: kvp: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 17/21] Tools: hv: kvp: use misc char device to communicate with kernel K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 18/21] Tools: hv: vss: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 19/21] Drivers: hv: vss: full handshake support K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 20/21] Drivers: hv: fcopy: " K. Y. Srinivasan
2015-04-12  1:07   ` [PATCH 21/21] Drivers: hv: utils: unify driver registration reporting K. Y. Srinivasan

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