From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753247AbbB1SY6 (ORCPT ); Sat, 28 Feb 2015 13:24:58 -0500 Received: from p3plsmtps2ded01.prod.phx3.secureserver.net ([208.109.80.58]:39264 "EHLO p3plsmtps2ded01.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752510AbbB1SXs (ORCPT ); Sat, 28 Feb 2015 13:23:48 -0500 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 6/7] Drivers: hv: vmbus: Suport an API to send pagebuffers with additional control Date: Sat, 28 Feb 2015 11:39:03 -0800 Message-Id: <1425152344-4953-6-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1425152344-4953-1-git-send-email-kys@microsoft.com> References: <1425152321-4914-1-git-send-email-kys@microsoft.com> <1425152344-4953-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement an API for sending pagebuffers that gives more control to the client in terms of setting the vmbus flags as well as deciding when to notify the host. This will be useful for enabling batch processing. Signed-off-by: K. Y. Srinivasan --- drivers/hv/channel.c | 33 +++++++++++++++++++++++++++------ include/linux/hyperv.h | 9 +++++++++ 2 files changed, 36 insertions(+), 6 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 9b79aca..f060d1f 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -636,13 +636,18 @@ int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, EXPORT_SYMBOL(vmbus_sendpacket); /* - * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer - * packets using a GPADL Direct packet type. + * vmbus_sendpacket_pagebuffer_ctl - Send a range of single-page buffer + * packets using a GPADL Direct packet type. This interface allows you + * to control notifying the host. This will be useful for sending + * batched data. Also the sender can control the send flags + * explicitly. */ -int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, +int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel, struct hv_page_buffer pagebuffers[], u32 pagecount, void *buffer, u32 bufferlen, - u64 requestid) + u64 requestid, + u32 flags, + bool kick_q) { int ret; int i; @@ -670,7 +675,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, /* Setup the descriptor */ desc.type = VM_PKT_DATA_USING_GPA_DIRECT; - desc.flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; + desc.flags = flags; desc.dataoffset8 = descsize >> 3; /* in 8-bytes grandularity */ desc.length8 = (u16)(packetlen_aligned >> 3); desc.transactionid = requestid; @@ -691,11 +696,27 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); - if (ret == 0 && signal) + if ((ret == 0) && kick_q && signal) vmbus_setevent(channel); return ret; } + +/* + * vmbus_sendpacket_pagebuffer - Send a range of single-page buffer + * packets using a GPADL Direct packet type. + */ +int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, + struct hv_page_buffer pagebuffers[], + u32 pagecount, void *buffer, u32 bufferlen, + u64 requestid) +{ + u32 flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; + return vmbus_sendpacket_pagebuffer_ctl(channel, pagebuffers, pagecount, + buffer, bufferlen, requestid, + flags, true); + +} EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); /* diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 1ca5824..86e1a7a 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -874,6 +874,15 @@ extern int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, u32 bufferlen, u64 requestid); +extern int vmbus_sendpacket_pagebuffer_ctl(struct vmbus_channel *channel, + struct hv_page_buffer pagebuffers[], + u32 pagecount, + void *buffer, + u32 bufferlen, + u64 requestid, + u32 flags, + bool kick_q); + extern int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, struct hv_multipage_buffer *mpb, void *buffer, -- 1.7.4.1