From patchwork Mon Mar 28 14:42:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrea Parri X-Patchwork-Id: 12793733 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7ECD3C433F5 for ; Mon, 28 Mar 2022 14:43:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244018AbiC1OpJ (ORCPT ); Mon, 28 Mar 2022 10:45:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39892 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244017AbiC1Oo6 (ORCPT ); Mon, 28 Mar 2022 10:44:58 -0400 Received: from mail-ej1-x634.google.com (mail-ej1-x634.google.com [IPv6:2a00:1450:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BC695DE56; Mon, 28 Mar 2022 07:43:17 -0700 (PDT) Received: by mail-ej1-x634.google.com with SMTP id bq8so15198731ejb.10; Mon, 28 Mar 2022 07:43:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=UMTqeBE3FIxp8HTVbYedcaXO9nqf4rXvpBaCDQ8h5rQ=; b=CP+jLK3XyRPt1s6LHqva5mG7v49WF71cPG7ErelvKANJ2MvpGpqbPTU3JJyZ+wMuYg roi1o0Kafl4dUQBQ95pGBSA94E4xl8L4gBvGcOFEF7dkPPtAnhz9e4T6OCA9VFw6sN+l FRhoTVfmpzWq9F79aiCqQBak2WPCwzEthUcAZPFmoyOgUCXhLewkvfgaKl65lmUUbiwN BmVukxngnR4hdrzP6pr7OuszH0G56FvJG0hsMDylPA4shj/HeGhpyBVwr0h5eDdYXDfA egcA2l7VBsL+OXjatrquWYZJYLRviuWILY6wS9k9HgBVh2g/pbcyTsR8TcmX0nZCz5Kh vPrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=UMTqeBE3FIxp8HTVbYedcaXO9nqf4rXvpBaCDQ8h5rQ=; b=8GkgeOOCg+cFdsqZgcJp60HDXgIqrmiNJedODvxVXBxkNJfHefhKSWhZfUK/jAC6db HPOxAl5wKn9PMS3mJzGOkUIoumFg9phnQAg9c4d8jioEk28c7GLo0ir5cvbNEeVlJTEw rgPCcYb1mdn4yZMSESpGaHpG6Uz8farP8LToAKtJzeWsV+pfoX0BTS4oHFXN3PBof0NL pDMJaGz+j/1tEyFMiYDAn6FdXSYfr1MmYiJ3f5/92dzcaPgeo1g2ICMgaPv+Ckt7TMYz HY/rZ/9kGwr1XuRevObwo3kFVFVykwDYfsoloNIMvYQ4TskWEh3CW2J8Ivz36KofAiV4 QWqg== X-Gm-Message-State: AOAM533/TYW4YI8g8QDJt/hh/3OvTlCTlmxgzLWZafeGdybuo3iu2D9Y IlypUnNhN/blzfbvxM0FE8I= X-Google-Smtp-Source: ABdhPJw7+9S0v7Xhf9hyaSMHMFA0ERycLJFI8Zejti6gd8HlXDWNirXQ/nL4Vr/YSz2PIjP+SVGURg== X-Received: by 2002:a17:907:6089:b0:6db:a3d7:3fa9 with SMTP id ht9-20020a170907608900b006dba3d73fa9mr29289697ejc.593.1648478594893; Mon, 28 Mar 2022 07:43:14 -0700 (PDT) Received: from anparri.mshome.net (host-82-59-4-232.retail.telecomitalia.it. [82.59.4.232]) by smtp.gmail.com with ESMTPSA id g2-20020aa7c842000000b0041314b98872sm7008983edt.22.2022.03.28.07.43.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Mar 2022 07:43:14 -0700 (PDT) From: "Andrea Parri (Microsoft)" To: KY Srinivasan , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Michael Kelley , Wei Hu , Lorenzo Pieralisi , Rob Herring , Krzysztof Wilczynski , Bjorn Helgaas Cc: linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, "Andrea Parri (Microsoft)" Subject: [RFC PATCH 3/4] Drivers: hv: vmbus: Introduce vmbus_sendpacket_getid() Date: Mon, 28 Mar 2022 16:42:43 +0200 Message-Id: <20220328144244.100228-4-parri.andrea@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220328144244.100228-1-parri.andrea@gmail.com> References: <20220328144244.100228-1-parri.andrea@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The function can be used to send a VMbus packet and retrieve the corresponding transaction ID. It will be used by hv_pci. No functional change. Suggested-by: Michael Kelley Signed-off-by: Andrea Parri (Microsoft) --- drivers/hv/channel.c | 38 ++++++++++++++++++++++++++++++++------ drivers/hv/hyperv_vmbus.h | 2 +- drivers/hv/ring_buffer.c | 4 +++- include/linux/hyperv.h | 7 +++++++ 4 files changed, 43 insertions(+), 8 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index a253eee3aeb1a..3eaa41c7ce15f 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -1022,11 +1022,13 @@ void vmbus_close(struct vmbus_channel *channel) EXPORT_SYMBOL_GPL(vmbus_close); /** - * vmbus_sendpacket() - Send the specified buffer on the given channel + * vmbus_sendpacket_getid() - Send the specified buffer on the given channel * @channel: Pointer to vmbus_channel structure * @buffer: Pointer to the buffer you want to send the data from. * @bufferlen: Maximum size of what the buffer holds. * @requestid: Identifier of the request + * @trans_id: Identifier of the transaction associated to this request, if + * the send is successful; undefined, otherwise. * @type: Type of packet that is being sent e.g. negotiate, time * packet etc. * @flags: 0 or VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED @@ -1036,8 +1038,8 @@ EXPORT_SYMBOL_GPL(vmbus_close); * * Mainly used by Hyper-V drivers. */ -int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, - u32 bufferlen, u64 requestid, +int vmbus_sendpacket_getid(struct vmbus_channel *channel, void *buffer, + u32 bufferlen, u64 requestid, u64 *trans_id, enum vmbus_packet_type type, u32 flags) { struct vmpacket_descriptor desc; @@ -1063,7 +1065,31 @@ int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, bufferlist[2].iov_base = &aligned_data; bufferlist[2].iov_len = (packetlen_aligned - packetlen); - return hv_ringbuffer_write(channel, bufferlist, num_vecs, requestid); + return hv_ringbuffer_write(channel, bufferlist, num_vecs, requestid, trans_id); +} +EXPORT_SYMBOL(vmbus_sendpacket_getid); + +/** + * vmbus_sendpacket() - Send the specified buffer on the given channel + * @channel: Pointer to vmbus_channel structure + * @buffer: Pointer to the buffer you want to send the data from. + * @bufferlen: Maximum size of what the buffer holds. + * @requestid: Identifier of the request + * @type: Type of packet that is being sent e.g. negotiate, time + * packet etc. + * @flags: 0 or VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED + * + * Sends data in @buffer directly to Hyper-V via the vmbus. + * This will send the data unparsed to Hyper-V. + * + * Mainly used by Hyper-V drivers. + */ +int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, + u32 bufferlen, u64 requestid, + enum vmbus_packet_type type, u32 flags) +{ + return vmbus_sendpacket_getid(channel, buffer, bufferlen, + requestid, NULL, type, flags); } EXPORT_SYMBOL(vmbus_sendpacket); @@ -1122,7 +1148,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, bufferlist[2].iov_base = &aligned_data; bufferlist[2].iov_len = (packetlen_aligned - packetlen); - return hv_ringbuffer_write(channel, bufferlist, 3, requestid); + return hv_ringbuffer_write(channel, bufferlist, 3, requestid, NULL); } EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer); @@ -1160,7 +1186,7 @@ int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, bufferlist[2].iov_base = &aligned_data; bufferlist[2].iov_len = (packetlen_aligned - packetlen); - return hv_ringbuffer_write(channel, bufferlist, 3, requestid); + return hv_ringbuffer_write(channel, bufferlist, 3, requestid, NULL); } EXPORT_SYMBOL_GPL(vmbus_sendpacket_mpb_desc); diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 3a1f007b678a0..64c0b9cbe183b 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -181,7 +181,7 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); int hv_ringbuffer_write(struct vmbus_channel *channel, const struct kvec *kv_list, u32 kv_count, - u64 requestid); + u64 requestid, u64 *trans_id); int hv_ringbuffer_read(struct vmbus_channel *channel, void *buffer, u32 buflen, u32 *buffer_actual_len, diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 71efacb909659..c8561c80c460c 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -283,7 +283,7 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info) /* Write to the ring buffer. */ int hv_ringbuffer_write(struct vmbus_channel *channel, const struct kvec *kv_list, u32 kv_count, - u64 requestid) + u64 requestid, u64 *trans_id) { int i; u32 bytes_avail_towrite; @@ -354,6 +354,8 @@ int hv_ringbuffer_write(struct vmbus_channel *channel, } desc = hv_get_ring_buffer(outring_info) + old_write; desc->trans_id = (rqst_id == VMBUS_NO_RQSTOR) ? requestid : rqst_id; + if (trans_id) + *trans_id = desc->trans_id; /* Set previous packet start */ prev_indices = hv_get_ring_bufferindices(outring_info); diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index fe2e0179ed51e..a7cb596d893b1 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1161,6 +1161,13 @@ extern int vmbus_open(struct vmbus_channel *channel, extern void vmbus_close(struct vmbus_channel *channel); +extern int vmbus_sendpacket_getid(struct vmbus_channel *channel, + void *buffer, + u32 bufferLen, + u64 requestid, + u64 *trans_id, + enum vmbus_packet_type type, + u32 flags); extern int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, u32 bufferLen,