From patchwork Wed Apr 14 14:49:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 421443 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75DBEC001E7 for ; Wed, 14 Apr 2021 14:50:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D6C86117A for ; Wed, 14 Apr 2021 14:50:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352080AbhDNOvI (ORCPT ); Wed, 14 Apr 2021 10:51:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352003AbhDNOu5 (ORCPT ); Wed, 14 Apr 2021 10:50:57 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7A99C061756; Wed, 14 Apr 2021 07:50:35 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id d10so14564546pgf.12; Wed, 14 Apr 2021 07:50:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=FJbcZ8KnexDAAQ5C4Sah9FWkqLY6Pv3HeJbolDJY4aA=; b=pJqRunkA+uvhxmvikCt8JBi6ru5mMAHBSouNbpNF9rJ0/UZBeBZbNJBCihskZckNdz VF19al63x7JcKIwSaI+KgRMKfSCSAY1Rw9bm3SeZTFumtAQ1F6F2t95WHbTa7fd9i7Tn oYWyOXXwTN9+AehaDQOGu3IYPhNL0uJPAF/Y5xrfhILPXupgDCaiPCDkfxwVRVWqt8q+ v1FJRcKkKffDj4UMUcXDwJEin7yz4TBxBoW5ErGESAAdJKNwJ1ukgEYbn+s0z/MPExFU EV7Gn16e8uqLMsjL1/Ua5qlsNxwABA+5vNnnX0j44xHWZEyyVt04dkbZk7p6QtVwr46f qTdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=FJbcZ8KnexDAAQ5C4Sah9FWkqLY6Pv3HeJbolDJY4aA=; b=GvNpKmeYZCewxMj0gRCDXVdOYeh3MQ+MeNV8pKu3jhgw/kVZ8J2zvbxrBbvyksOm0S 3vOKTdwaaNX6Ik2Sg4yR2auW25wWkQplZqArGOtHuaCTL5+D/tZV9K9ZGBpLNZcWL90P ymxJ6i7rczWFuvBk9gGbKNTBx5OuHEpSlFHU+C/hLqP122iLaMDoIyLxI6z+YlU2Zk7C u19mOOuaSQqqzp0brUhBt2bviw7ZoMg2X4gaotqHDKrtrKA1fcCGeE8FjW9D4YPgTi7O nym2F5zriPEz0mJC8ODj7X1sd4dl2yyc8/eivA+HembqYyUBNs7nzGTGMEakh0C0wLIY 3YkA== X-Gm-Message-State: AOAM533X0H9AFVC1D6IT0Dl2YDG0eK7eSMQCSeObnhKoiAIrecBnPlgF VXjh1zdDMqm1xfd8bghS/j0= X-Google-Smtp-Source: ABdhPJxHAv83JdLDizjV20z7u62dRC/ZGAyfJ/XHZQUwINjnLav8NcwqNU6XQrZbUuAS+bM3Dz+Utw== X-Received: by 2002:a63:1646:: with SMTP id 6mr39049996pgw.321.1618411835543; Wed, 14 Apr 2021 07:50:35 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:35:ebad:12c1:f579:e332]) by smtp.gmail.com with ESMTPSA id w67sm17732522pgb.87.2021.04.14.07.50.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Apr 2021 07:50:35 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, akpm@linux-foundation.org, gregkh@linuxfoundation.org, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: Tianyu Lan , iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [Resend RFC PATCH V2 12/12] HV/Storvsc: Add Isolation VM support for storvsc driver Date: Wed, 14 Apr 2021 10:49:45 -0400 Message-Id: <20210414144945.3460554-13-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210414144945.3460554-1-ltykernel@gmail.com> References: <20210414144945.3460554-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Tianyu Lan In Isolation VM, all shared memory with host needs to mark visible to host via hvcall. vmbus_establish_gpadl() has already done it for netvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_ mpb_desc() still need to handle. Use DMA API to map/umap these memory during sending/receiving packet and Hyper-V DMA ops callback will use swiotlb fucntion to allocate bounce buffer and copy data from/to bounce buffer. Signed-off-by: Tianyu Lan --- drivers/scsi/storvsc_drv.c | 67 +++++++++++++++++++++++++++++++++++++- 1 file changed, 66 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 2e4fa77445fd..d271578b1811 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -21,6 +21,8 @@ #include #include #include +#include +#include #include #include #include @@ -414,6 +416,11 @@ static void storvsc_on_channel_callback(void *context); #define STORVSC_IDE_MAX_TARGETS 1 #define STORVSC_IDE_MAX_CHANNELS 1 +struct dma_range { + dma_addr_t dma; + u32 mapping_size; +}; + struct storvsc_cmd_request { struct scsi_cmnd *cmd; @@ -427,6 +434,8 @@ struct storvsc_cmd_request { u32 payload_sz; struct vstor_packet vstor_packet; + u32 hvpg_count; + struct dma_range *dma_range; }; @@ -1236,6 +1245,7 @@ static void storvsc_on_channel_callback(void *context) const struct vmpacket_descriptor *desc; struct hv_device *device; struct storvsc_device *stor_device; + int i; if (channel->primary_channel != NULL) device = channel->primary_channel->device_obj; @@ -1249,6 +1259,8 @@ static void storvsc_on_channel_callback(void *context) foreach_vmbus_pkt(desc, channel) { void *packet = hv_pkt_data(desc); struct storvsc_cmd_request *request; + enum dma_data_direction dir; + u32 attrs; u64 cmd_rqst; cmd_rqst = vmbus_request_addr(&channel->requestor, @@ -1261,6 +1273,22 @@ static void storvsc_on_channel_callback(void *context) request = (struct storvsc_cmd_request *)(unsigned long)cmd_rqst; + if (request->vstor_packet.vm_srb.data_in == READ_TYPE) + dir = DMA_FROM_DEVICE; + else + dir = DMA_TO_DEVICE; + + if (request->dma_range) { + for (i = 0; i < request->hvpg_count; i++) + dma_unmap_page_attrs(&device->device, + request->dma_range[i].dma, + request->dma_range[i].mapping_size, + request->vstor_packet.vm_srb.data_in + == READ_TYPE ? + DMA_FROM_DEVICE : DMA_TO_DEVICE, attrs); + kfree(request->dma_range); + } + if (request == &stor_device->init_request || request == &stor_device->reset_request) { memcpy(&request->vstor_packet, packet, @@ -1682,8 +1710,10 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) struct vmscsi_request *vm_srb; struct scatterlist *cur_sgl; struct vmbus_packet_mpb_array *payload; + enum dma_data_direction dir; u32 payload_sz; u32 length; + u32 attrs; if (vmstor_proto_version <= VMSTOR_PROTO_VERSION_WIN8) { /* @@ -1722,14 +1752,17 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) case DMA_TO_DEVICE: vm_srb->data_in = WRITE_TYPE; vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_OUT; + dir = DMA_TO_DEVICE; break; case DMA_FROM_DEVICE: vm_srb->data_in = READ_TYPE; vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_IN; + dir = DMA_FROM_DEVICE; break; case DMA_NONE: vm_srb->data_in = UNKNOWN_TYPE; vm_srb->win8_extension.srb_flags |= SRB_FLAGS_NO_DATA_TRANSFER; + dir = DMA_NONE; break; default: /* @@ -1786,6 +1819,12 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) hvpgoff = sgl->offset >> HV_HYP_PAGE_SHIFT; cur_sgl = sgl; + + cmd_request->dma_range = kzalloc(sizeof(struct dma_range) * hvpg_count, + GFP_ATOMIC); + if (!cmd_request->dma_range) + return -ENOMEM; + for (i = 0; i < hvpg_count; i++) { /* * 'i' is the index of hv pages in the payload and @@ -1805,6 +1844,8 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) */ unsigned int hvpgoff_in_page = (i + hvpgoff) % NR_HV_HYP_PAGES_IN_PAGE; + dma_addr_t dma; + u32 size; /* * Two cases that we need to fetch a page: @@ -1817,8 +1858,28 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) cur_sgl = sg_next(cur_sgl); } - payload->range.pfn_array[i] = hvpfn + hvpgoff_in_page; + size = min(HV_HYP_PAGE_SIZE - offset_in_hvpg, (unsigned long)length); + dma = dma_map_page_attrs(&dev->device, + pfn_to_page(hvpfn), + offset_in_hvpg, size, + scmnd->sc_data_direction, attrs); + if (dma_mapping_error(&dev->device, dma)) { + pr_warn("dma map error.\n"); + ret = -ENOMEM; + goto free_dma_range; + } + + if (offset_in_hvpg) { + payload->range.offset = dma & ~HV_HYP_PAGE_MASK; + offset_in_hvpg = 0; + } + + cmd_request->dma_range[i].dma = dma; + cmd_request->dma_range[i].mapping_size = size; + payload->range.pfn_array[i] = dma >> HV_HYP_PAGE_SHIFT; + length -= size; } + cmd_request->hvpg_count = hvpg_count; } cmd_request->payload = payload; @@ -1836,6 +1897,10 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) } return 0; + +free_dma_range: + kfree(cmd_request->dma_range); + return ret; } static struct scsi_host_template scsi_driver = {