From mboxrd@z Thu Jan 1 00:00:00 1970 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,SPF_PASS,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 BF9B6C07E9B for ; Wed, 7 Jul 2021 15:51:51 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 729E861CBF for ; Wed, 7 Jul 2021 15:51:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 729E861CBF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.152539.281809 (Exim 4.92) (envelope-from ) id 1m19ps-0000xw-Gy; Wed, 07 Jul 2021 15:51:40 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 152539.281809; Wed, 07 Jul 2021 15:51:40 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m19ps-0000x5-DE; Wed, 07 Jul 2021 15:51:40 +0000 Received: by outflank-mailman (input) for mailman id 152539; Wed, 07 Jul 2021 15:51:38 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m19mT-0002ed-6y for xen-devel@lists.xenproject.org; Wed, 07 Jul 2021 15:48:09 +0000 Received: from mail-pj1-x1031.google.com (unknown [2607:f8b0:4864:20::1031]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id ca43c959-8a80-44c2-a26d-38b2ca2f8494; Wed, 07 Jul 2021 15:47:13 +0000 (UTC) Received: by mail-pj1-x1031.google.com with SMTP id b8-20020a17090a4888b02901725eedd346so1909825pjh.4 for ; Wed, 07 Jul 2021 08:47:13 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:38:6b47:cf3e:bbf2:d229]) by smtp.gmail.com with ESMTPSA id q18sm23093560pgj.8.2021.07.07.08.47.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jul 2021 08:47:12 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ca43c959-8a80-44c2-a26d-38b2ca2f8494 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=HlyScOtQVoYnoHAZopBay4tlsKScaz3uD66IFgkGB/I=; b=gnz1C+yn2F6jk2O7gk2x9gxUHURZsfF5XLUJ9QUqZxW9QQ8vYC3vvegOxXO9R4DFYN 9aEKSS0P/WP8FXlRkhBlICHCsZgnUNkAuXj8nx6L5YTV+kaDmrwF8i4/jBsHqeF8WqH7 uFGPQwROQWFNjwC6rT/V+bBbNRJ2h7/YJRFCtUaL3fJS2vdOnzLy6vNSOHFb5ZFLk3r/ hrKiKbbfpfSkPOvJuQ53To6i9/z5+AfF1kbKl+tWygqCe8kJqljt+E/DlC7f9zYoimIN 99hqd8fWGEIOble3BEp3B9fbFL/yoNtxRUiHgHZHOu1QD9tOlArcAoHYdogTxetcVgku eGIA== 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=HlyScOtQVoYnoHAZopBay4tlsKScaz3uD66IFgkGB/I=; b=Wcx/2ypl9wXKp5JR+qZXaWF+QXt4UePVULaonGcit7OZMCsNnmwcty/L7x1m8qQGYG aEtj78pOQpPbSkVTgZgYWPpNrvZ5IIOzc2LJsch5YxPzEOhfo62EZVgTYknEyBDhOcGh yBpr/R/U+HWAIyV9nHCtSGynrZcykZ6MNazgG2YfdSYMcCUrJa4JAnhINDptW+dXGkLw H1UtcJtEk+LyicP3He/YEk+c/PgnhA0wnAHdn3pXKNuZWgKZVhdhDH42yw/aoH5hrzMI rPGUFnjMQibU6upv0N1o4BdOqnoLkILZASv2zqjTI3EwQCPkf1I+aHkoIGk4DnJCFxKG z7Pw== X-Gm-Message-State: AOAM5324GiAYRCVsCqqsBhTx5LmFbLwsngbPEdY7K9eFCIZcXvkYCpXY qzMzvaljDQMEjKVYgsH6yG4= X-Google-Smtp-Source: ABdhPJyKzXN9u1DVm1W6X3qXZ/nh6euE9GS3yVqvO9By160QCA1G6fa3xLr2paYIAzHzvblMoOF23g== X-Received: by 2002:a17:90a:3c8d:: with SMTP id g13mr198396pjc.229.1625672833174; Wed, 07 Jul 2021 08:47:13 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, rppt@kernel.org, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, ardb@kernel.org, robh@kernel.org, nramas@linux.microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, david@redhat.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, keescook@chromium.org, rientjes@google.com, hannes@cmpxchg.org, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, brijesh.singh@amd.com, anparri@microsoft.com Subject: [Resend RFC PATCH V4 12/13] HV/Storvsc: Add Isolation VM support for storvsc driver Date: Wed, 7 Jul 2021 11:46:26 -0400 Message-Id: <20210707154629.3977369-13-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210707154629.3977369-1-ltykernel@gmail.com> References: <20210707154629.3977369-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 storvsc 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 function to allocate bounce buffer and copy data from/to bounce buffer. Signed-off-by: Tianyu Lan --- drivers/scsi/storvsc_drv.c | 68 +++++++++++++++++++++++++++++++++++--- 1 file changed, 63 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 403753929320..cc9cb32f6621 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 @@ -427,6 +429,8 @@ struct storvsc_cmd_request { u32 payload_sz; struct vstor_packet vstor_packet; + u32 hvpg_count; + struct hv_dma_range *dma_range; }; @@ -509,6 +513,14 @@ struct storvsc_scan_work { u8 tgt_id; }; +#define storvsc_dma_map(dev, page, offset, size, dir) \ + dma_map_page(dev, page, offset, size, dir) + +#define storvsc_dma_unmap(dev, dma_range, dir) \ + dma_unmap_page(dev, dma_range.dma, \ + dma_range.mapping_size, \ + dir ? DMA_FROM_DEVICE : DMA_TO_DEVICE) + static void storvsc_device_scan(struct work_struct *work) { struct storvsc_scan_work *wrk; @@ -1267,6 +1279,7 @@ static void storvsc_on_channel_callback(void *context) struct hv_device *device; struct storvsc_device *stor_device; struct Scsi_Host *shost; + int i; if (channel->primary_channel != NULL) device = channel->primary_channel->device_obj; @@ -1321,6 +1334,15 @@ static void storvsc_on_channel_callback(void *context) request = (struct storvsc_cmd_request *)scsi_cmd_priv(scmnd); } + if (request->dma_range) { + for (i = 0; i < request->hvpg_count; i++) + storvsc_dma_unmap(&device->device, + request->dma_range[i], + request->vstor_packet.vm_srb.data_in == READ_TYPE); + + kfree(request->dma_range); + } + storvsc_on_receive(stor_device, packet, request); continue; } @@ -1817,7 +1839,9 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) unsigned int hvpgoff, hvpfns_to_add; unsigned long offset_in_hvpg = offset_in_hvpage(sgl->offset); unsigned int hvpg_count = HVPFN_UP(offset_in_hvpg + length); + dma_addr_t dma; u64 hvpfn; + u32 size; if (hvpg_count > MAX_PAGE_BUFFER_COUNT) { @@ -1831,6 +1855,13 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) payload->range.len = length; payload->range.offset = offset_in_hvpg; + cmd_request->dma_range = kcalloc(hvpg_count, + sizeof(*cmd_request->dma_range), + GFP_ATOMIC); + if (!cmd_request->dma_range) { + ret = -ENOMEM; + goto free_payload; + } for (i = 0; sgl != NULL; sgl = sg_next(sgl)) { /* @@ -1854,9 +1885,29 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) * last sgl should be reached at the same time that * the PFN array is filled. */ - while (hvpfns_to_add--) - payload->range.pfn_array[i++] = hvpfn++; + while (hvpfns_to_add--) { + size = min(HV_HYP_PAGE_SIZE - offset_in_hvpg, + (unsigned long)length); + dma = storvsc_dma_map(&dev->device, pfn_to_page(hvpfn++), + offset_in_hvpg, size, + scmnd->sc_data_direction); + if (dma_mapping_error(&dev->device, dma)) { + 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; @@ -1867,13 +1918,20 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) put_cpu(); if (ret == -EAGAIN) { - if (payload_sz > sizeof(cmd_request->mpb)) - kfree(payload); /* no more space */ - return SCSI_MLQUEUE_DEVICE_BUSY; + ret = SCSI_MLQUEUE_DEVICE_BUSY; + goto free_dma_range; } return 0; + +free_dma_range: + kfree(cmd_request->dma_range); + +free_payload: + if (payload_sz > sizeof(cmd_request->mpb)) + kfree(payload); + return ret; } static struct scsi_host_template scsi_driver = { -- 2.25.1