From patchwork Tue Nov 23 14:30:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12634411 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 E8D19C4167E for ; Tue, 23 Nov 2021 14:37:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238382AbhKWOkQ (ORCPT ); Tue, 23 Nov 2021 09:40:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238276AbhKWOkK (ORCPT ); Tue, 23 Nov 2021 09:40:10 -0500 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BE7DC061714; Tue, 23 Nov 2021 06:37:02 -0800 (PST) Received: by mail-pl1-x634.google.com with SMTP id m24so17219075pls.10; Tue, 23 Nov 2021 06:37:02 -0800 (PST) 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=Ak926pCUpNKs+47FmVVMlYhwNY9vAunl0LxYrKNKSNw=; b=QxxMavfWDAJAz7jNhCS3lNTNa0flyv5hNihdQPccb5eNCjHF55hQpWrnsEQkCVJghc 7GPdcT9HSD5QViryH0UX4Aun2WA+mGBa3Amr3ad9iSXIuSGQC24/bMpDjGgiFb4k/a9a ZAYNXQoeZmxJm3HiW7hj+JkREkiGe8NUYb/+S8lBQGh4bi3TU+N+GfremM9Ba5JS8SPD 8wNuTIzD34QP1Pzt5TU42nLmCmWJm3r5yxYzZS/tIc11jyeaKntaaRsqcB2DjiSxqBe2 zqVd2p6oiNp4mOxg/CZiswjoXfCt/DOMgeHrMN9AL4KvPtBfL8X+QWcwzsFyPSdJLLkC 5TOA== 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=Ak926pCUpNKs+47FmVVMlYhwNY9vAunl0LxYrKNKSNw=; b=sFGAdlQagtppb99w3GQ3jVDZn4EV/42BsWKCrOTDl4OwcSj0fJnyHhxmoV8kkr1V1f ZxYasktru//6wTMRQVxSJOWysEz+HaPS2hkrYDzyIVwTkGxZrG4pb4Ul8kc8ZN9FON5k 9kAx3bqQF3aO46XBeyPq1friz0WGtf0cji/hVsDpn4vJcxVP1yepgDAWTEkBbzlxPoA5 BU63d44I+wSBjh+/cwMJ4YGpc7BW6B+z9kQegYvhQo8XKa+rhn1gF80vfY161Bo/StBp 9WqtfXNzESqUE/RtDECfTopFzWMGDMWGEehaZD6sr09VEt/hsIotc1VmVsjIEACFDMZk Kv+Q== X-Gm-Message-State: AOAM531wCnDjFbpOU/QH3qkNgfiAYDTfNqr/tx7KZHj79hNsW0UUdDJ+ mTDyayJjY4gRJBbTSDbUh54= X-Google-Smtp-Source: ABdhPJxTU1w0vUGn7mvy7jQu/10DsjPZwfyCqNOGRf+62qAFrRBW+AJvObLD7wd2mtZecQ+9K9O66g== X-Received: by 2002:a17:90b:1e4e:: with SMTP id pi14mr3462656pjb.161.1637678221896; Tue, 23 Nov 2021 06:37:01 -0800 (PST) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:1:af65:c3d4:6df:5a8b]) by smtp.gmail.com with ESMTPSA id j13sm11926127pfc.151.2021.11.23.06.37.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Nov 2021 06:37:01 -0800 (PST) From: Tianyu Lan To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, luto@kernel.org, peterz@infradead.org, jgross@suse.com, sstabellini@kernel.org, boris.ostrovsky@oracle.com, kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, xen-devel@lists.xenproject.org, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.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, konrad.wilk@oracle.com, parri.andrea@gmail.com, dave.hansen@intel.com Subject: [PATCH V2 6/6] scsi: storvsc: Add Isolation VM support for storvsc driver Date: Tue, 23 Nov 2021 09:30:37 -0500 Message-Id: <20211123143039.331929-7-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211123143039.331929-1-ltykernel@gmail.com> References: <20211123143039.331929-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@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 storvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_ mpb_desc() still needs to be handled. Use DMA API(scsi_dma_map/unmap) to map these memory during sending/receiving packet and return swiotlb bounce buffer dma address. In Isolation VM, swiotlb bounce buffer is marked to be visible to host and the swiotlb force mode is enabled. Set device's dma min align mask to HV_HYP_PAGE_SIZE - 1 in order to keep the original data offset in the bounce buffer. Signed-off-by: Tianyu Lan --- drivers/scsi/storvsc_drv.c | 37 +++++++++++++++++++++---------------- include/linux/hyperv.h | 1 + 2 files changed, 22 insertions(+), 16 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 20595c0ba0ae..ae293600d799 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -21,6 +21,8 @@ #include #include #include +#include + #include #include #include @@ -1336,6 +1338,7 @@ static void storvsc_on_channel_callback(void *context) continue; } request = (struct storvsc_cmd_request *)scsi_cmd_priv(scmnd); + scsi_dma_unmap(scmnd); } storvsc_on_receive(stor_device, packet, request); @@ -1749,7 +1752,6 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) struct hv_host_device *host_dev = shost_priv(host); struct hv_device *dev = host_dev->dev; struct storvsc_cmd_request *cmd_request = scsi_cmd_priv(scmnd); - int i; struct scatterlist *sgl; unsigned int sg_count; struct vmscsi_request *vm_srb; @@ -1831,10 +1833,11 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) payload_sz = sizeof(cmd_request->mpb); if (sg_count) { - 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); - u64 hvpfn; + struct scatterlist *sg; + unsigned long hvpfn, hvpfns_to_add; + int j, i = 0; if (hvpg_count > MAX_PAGE_BUFFER_COUNT) { @@ -1848,21 +1851,22 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) payload->range.len = length; payload->range.offset = offset_in_hvpg; + sg_count = scsi_dma_map(scmnd); + if (sg_count < 0) + return SCSI_MLQUEUE_DEVICE_BUSY; - for (i = 0; sgl != NULL; sgl = sg_next(sgl)) { + for_each_sg(sgl, sg, sg_count, j) { /* - * Init values for the current sgl entry. hvpgoff - * and hvpfns_to_add are in units of Hyper-V size - * pages. Handling the PAGE_SIZE != HV_HYP_PAGE_SIZE - * case also handles values of sgl->offset that are - * larger than PAGE_SIZE. Such offsets are handled - * even on other than the first sgl entry, provided - * they are a multiple of PAGE_SIZE. + * Init values for the current sgl entry. hvpfns_to_add + * is in units of Hyper-V size pages. Handling the + * PAGE_SIZE != HV_HYP_PAGE_SIZE case also handles + * values of sgl->offset that are larger than PAGE_SIZE. + * Such offsets are handled even on other than the first + * sgl entry, provided they are a multiple of PAGE_SIZE. */ - hvpgoff = HVPFN_DOWN(sgl->offset); - hvpfn = page_to_hvpfn(sg_page(sgl)) + hvpgoff; - hvpfns_to_add = HVPFN_UP(sgl->offset + sgl->length) - - hvpgoff; + hvpfn = HVPFN_DOWN(sg_dma_address(sg)); + hvpfns_to_add = HVPFN_UP(sg_dma_address(sg) + + sg_dma_len(sg)) - hvpfn; /* * Fill the next portion of the PFN array with @@ -1872,7 +1876,7 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd) * the PFN array is filled. */ while (hvpfns_to_add--) - payload->range.pfn_array[i++] = hvpfn++; + payload->range.pfn_array[i++] = hvpfn++; } } @@ -2016,6 +2020,7 @@ static int storvsc_probe(struct hv_device *device, stor_device->vmscsi_size_delta = sizeof(struct vmscsi_win8_extension); spin_lock_init(&stor_device->lock); hv_set_drvdata(device, stor_device); + dma_set_min_align_mask(&device->device, HV_HYP_PAGE_SIZE - 1); stor_device->port_number = host->host_no; ret = storvsc_connect_to_vsp(device, storvsc_ringbuffer_size, is_fc); diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 8882e46d1070..2840e51ee5c5 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1262,6 +1262,7 @@ struct hv_device { struct vmbus_channel *channel; struct kset *channels_kset; + struct device_dma_parameters dma_parms; /* place holder to keep track of the dir for hv device in debugfs */ struct dentry *debug_dir;