Received: by 2002:ac0:a5b6:0:0:0:0:0 with SMTP id m51-v6csp181770imm; Mon, 4 Jun 2018 15:26:33 -0700 (PDT) X-Google-Smtp-Source: ADUXVKIA2PFgdKR8EGyfAXNPbEH6IqQPCYV9RFSCqo0BSk/FRmjlPkP6hxi90tj5ApxjSbrvyMTf X-Received: by 2002:a63:7a07:: with SMTP id v7-v6mr18582901pgc.444.1528151193772; Mon, 04 Jun 2018 15:26:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1528151193; cv=none; d=google.com; s=arc-20160816; b=pe+JekA5TgCYiIWC1s0j7sKmgwxIcJZwQtE4ii9QZQeCX13lOQtHCDRie9/GDadOBh 2cNqZYGwkemcDEj6X1+fbUl/TsJ1AYy2JBHG5XNCi61rMQVWe3MkhpjcEm6VzQGCrsi/ G1XaIuLqhbdngS2n3S93vPL1xQrWnu3aQxt7kus3/+9Uk6wNeo9VFfheUjj4j0SnK/Dj MXRSkYZBdJL0LNAMNRmxd1id9ayijgikGcvhoGGaZ3i7JCQ058Ws/A0cEEmefbW44Zm4 ty5a5kQxnDorcmfIOzAMMotfweO86sEwJvFjjWwzqJwFb0cq4UIf8zZM3Cr208m9K3pR Eq+g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-language :content-transfer-encoding:in-reply-to:mime-version:user-agent:date :message-id:autocrypt:openpgp:from:references:cc:to:subject :dkim-signature:arc-authentication-results; bh=AjDwIPKI7W6IK63Kvv55jC2rXqZM0pO5WfRExnrJ0SY=; b=gIYC4YRIAUooJbylMgmPNCVFPxL5hZAPEOc8YnzJUtL5JGEJHJdKlWePGPU7lz4+3j eIIs1AaS+tRn07ouvZqW9r4gvTAlLW+g6BlG+/3qOqLHk/6HnWGA8vKktxyz8i7ww5b4 CT1iWN8lO/QDoPwGVeXh4p+W0CHhUnk+q4dcio2UFMarwjPU0gU29dFg9vqS1wZcDsf/ rpFgBlftG7mdhy1wCiGGjwlwLiXvMgiU41o30Ku7ipu4DKUi+sweWg9C89QD5L+5/cAn b6TtsvxmcvU2wfMw8ww3+WRRmEtY86HHecFAvtT8a8iTvHh7xICeQAn87em9KEIezrNa C9DA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=Hqx+aNz7; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d12-v6si37090646pgq.154.2018.06.04.15.26.19; Mon, 04 Jun 2018 15:26:33 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=Hqx+aNz7; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751832AbeFDWZL (ORCPT + 99 others); Mon, 4 Jun 2018 18:25:11 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:43448 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751619AbeFDWYo (ORCPT ); Mon, 4 Jun 2018 18:24:44 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w54ML2gv075369; Mon, 4 Jun 2018 22:24:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2017-10-26; bh=AjDwIPKI7W6IK63Kvv55jC2rXqZM0pO5WfRExnrJ0SY=; b=Hqx+aNz7XdUcFByhiCuwe0SnV9mA7W0/vyfrmuM0AXQwEcmX2Fv4+2Ftbt5I/UK2DqNm YeMVLFt1LT1wWIo1ou/FRB2lKJGY3B3/laY+ykDwLWVpL0gY/qev2uwryAZAv5Vroodl oqb9KpmleJf6LIuIec1rbj+jBGVzlKyv+QdoGnplT2CEADDZ2pX1o/yQDY8FQhH0J5/g HrvuhSXSMYCrQ23WRLt+dbeugPDEqNspKQAo7A+ASfg9Ss9KaD19xCzvnQZp9/L6zrM9 tVfSD+m00EpCeTLml6KQkCQ/4+Fp1LSOR2g4erVApok5ScRLsYWTu5blACN2Nnaj43uc Ig== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2jbvypdhp6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 04 Jun 2018 22:24:35 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w54MOZpg032341 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 4 Jun 2018 22:24:35 GMT Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w54MOYWq013983; Mon, 4 Jun 2018 22:24:34 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 04 Jun 2018 15:24:33 -0700 Subject: Re: [PATCH v2 8/9] xen/gntdev: Implement dma-buf import functionality To: Oleksandr Andrushchenko , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, jgross@suse.com, konrad.wilk@oracle.com Cc: daniel.vetter@intel.com, dongwon.kim@intel.com, matthew.d.roper@intel.com, Oleksandr Andrushchenko References: <20180601114132.22596-1-andr2000@gmail.com> <20180601114132.22596-9-andr2000@gmail.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; prefer-encrypt=mutual; keydata= xsFNBFH8CgsBEAC0KiOi9siOvlXatK2xX99e/J3OvApoYWjieVQ9232Eb7GzCWrItCzP8FUV PQg8rMsSd0OzIvvjbEAvaWLlbs8wa3MtVLysHY/DfqRK9Zvr/RgrsYC6ukOB7igy2PGqZd+M MDnSmVzik0sPvB6xPV7QyFsykEgpnHbvdZAUy/vyys8xgT0PVYR5hyvhyf6VIfGuvqIsvJw5 C8+P71CHI+U/IhsKrLrsiYHpAhQkw+Zvyeml6XSi5w4LXDbF+3oholKYCkPwxmGdK8MUIdkM d7iYdKqiP4W6FKQou/lC3jvOceGupEoDV9botSWEIIlKdtm6C4GfL45RD8V4B9iy24JHPlom woVWc0xBZboQguhauQqrBFooHO3roEeM1pxXjLUbDtH4t3SAI3gt4dpSyT3EvzhyNQVVIxj2 FXnIChrYxR6S0ijSqUKO0cAduenhBrpYbz9qFcB/GyxD+ZWY7OgQKHUZMWapx5bHGQ8bUZz2 SfjZwK+GETGhfkvNMf6zXbZkDq4kKB/ywaKvVPodS1Poa44+B9sxbUp1jMfFtlOJ3AYB0WDS Op3d7F2ry20CIf1Ifh0nIxkQPkTX7aX5rI92oZeu5u038dHUu/dO2EcuCjl1eDMGm5PLHDSP 0QUw5xzk1Y8MG1JQ56PtqReO33inBXG63yTIikJmUXFTw6lLJwARAQABzTNCb3JpcyBPc3Ry b3Zza3kgKFdvcmspIDxib3Jpcy5vc3Ryb3Zza3lAb3JhY2xlLmNvbT7CwXgEEwECACIFAlH8 CgsCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEIredpCGysGyasEP/j5xApopUf4g 9Fl3UxZuBx+oduuw3JHqgbGZ2siA3EA4bKwtKq8eT7ekpApn4c0HA8TWTDtgZtLSV5IdH+9z JimBDrhLkDI3Zsx2CafL4pMJvpUavhc5mEU8myp4dWCuIylHiWG65agvUeFZYK4P33fGqoaS VGx3tsQIAr7MsQxilMfRiTEoYH0WWthhE0YVQzV6kx4wj4yLGYPPBtFqnrapKKC8yFTpgjaK jImqWhU9CSUAXdNEs/oKVR1XlkDpMCFDl88vKAuJwugnixjbPFTVPyoC7+4Bm/FnL3iwlJVE qIGQRspt09r+datFzPqSbp5Fo/9m4JSvgtPp2X2+gIGgLPWp2ft1NXHHVWP19sPgEsEJXSr9 tskM8ScxEkqAUuDs6+x/ISX8wa5Pvmo65drN+JWA8EqKOHQG6LUsUdJolFM2i4Z0k40BnFU/ kjTARjrXW94LwokVy4x+ZYgImrnKWeKac6fMfMwH2aKpCQLlVxdO4qvJkv92SzZz4538az1T m+3ekJAimou89cXwXHCFb5WqJcyjDfdQF857vTn1z4qu7udYCuuV/4xDEhslUq1+GcNDjAhB nNYPzD+SvhWEsrjuXv+fDONdJtmLUpKs4Jtak3smGGhZsqpcNv8nQzUGDQZjuCSmDqW8vn2o hWwveNeRTkxh+2x1Qb3GT46uzsFNBFH8CgsBEADGC/yx5ctcLQlB9hbq7KNqCDyZNoYu1HAB Hal3MuxPfoGKObEktawQPQaSTB5vNlDxKihezLnlT/PKjcXC2R1OjSDinlu5XNGc6mnky03q yymUPyiMtWhBBftezTRxWRslPaFWlg/h/Y1iDuOcklhpr7K1h1jRPCrf1yIoxbIpDbffnuyz kuto4AahRvBU4Js4sU7f/btU+h+e0AcLVzIhTVPIz7PM+Gk2LNzZ3/on4dnEc/qd+ZZFlOQ4 KDN/hPqlwA/YJsKzAPX51L6Vv344pqTm6Z0f9M7YALB/11FO2nBB7zw7HAUYqJeHutCwxm7i BDNt0g9fhviNcJzagqJ1R7aPjtjBoYvKkbwNu5sWDpQ4idnsnck4YT6ctzN4I+6lfkU8zMzC gM2R4qqUXmxFIS4Bee+gnJi0Pc3KcBYBZsDK44FtM//5Cp9DrxRQOh19kNHBlxkmEb8kL/pw XIDcEq8MXzPBbxwHKJ3QRWRe5jPNpf8HCjnZz0XyJV0/4M1JvOua7IZftOttQ6KnM4m6WNIZ 2ydg7dBhDa6iv1oKdL7wdp/rCulVWn8R7+3cRK95SnWiJ0qKDlMbIN8oGMhHdin8cSRYdmHK kTnvSGJNlkis5a+048o0C6jI3LozQYD/W9wq7MvgChgVQw1iEOB4u/3FXDEGulRVko6xCBU4 SQARAQABwsFfBBgBAgAJBQJR/AoLAhsMAAoJEIredpCGysGyfvMQAIywR6jTqix6/fL0Ip8G jpt3uk//QNxGJE3ZkUNLX6N786vnEJvc1beCu6EwqD1ezG9fJKMl7F3SEgpYaiKEcHfoKGdh 30B3Hsq44vOoxR6zxw2B/giADjhmWTP5tWQ9548N4VhIZMYQMQCkdqaueSL+8asp8tBNP+TJ PAIIANYvJaD8xA7sYUXGTzOXDh2THWSvmEWWmzok8er/u6ZKdS1YmZkUy8cfzrll/9hiGCTj u3qcaOM6i/m4hqtvsI1cOORMVwjJF4+IkC5ZBoeRs/xW5zIBdSUoC8L+OCyj5JETWTt40+lu qoqAF/AEGsNZTrwHJYu9rbHH260C0KYCNqmxDdcROUqIzJdzDKOrDmebkEVnxVeLJBIhYZUd t3Iq9hdjpU50TA6sQ3mZxzBdfRgg+vaj2DsJqI5Xla9QGKD+xNT6v14cZuIMZzO7w0DoojM4 ByrabFsOQxGvE0w9Dch2BDSI2Xyk1zjPKxG1VNBQVx3flH37QDWpL2zlJikW29Ws86PHdthh Fm5PY8YtX576DchSP6qJC57/eAAe/9ztZdVAdesQwGb9hZHJc75B+VNm4xrh/PJO6c1THqdQ 19WVJ+7rDx3PhVncGlbAOiiiE3NOFPJ1OQYxPKtpBUukAlOTnkKE6QcA4zckFepUkfmBV1wM Jg6OxFYd01z+a+oL Message-ID: <7ef4f26e-4225-ea7e-8183-9a6c3fe69345@oracle.com> Date: Mon, 4 Jun 2018 18:28:18 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180601114132.22596-9-andr2000@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8914 signatures=668702 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=672 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1805220000 definitions=main-1806040254 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote: > /* ------------------------------------------------------------------ */ > > +static int > +dmabuf_imp_grant_foreign_access(struct page **pages, u32 *refs, > + int count, int domid) > +{ > + grant_ref_t priv_gref_head; > + int i, ret; > + > + ret = gnttab_alloc_grant_references(count, &priv_gref_head); > + if (ret < 0) { > + pr_err("Cannot allocate grant references, ret %d\n", ret); > + return ret; > + } > + > + for (i = 0; i < count; i++) { > + int cur_ref; > + > + cur_ref = gnttab_claim_grant_reference(&priv_gref_head); > + if (cur_ref < 0) { > + ret = cur_ref; > + pr_err("Cannot claim grant reference, ret %d\n", ret); > + goto out; > + } > + > + gnttab_grant_foreign_access_ref(cur_ref, domid, > + xen_page_to_gfn(pages[i]), 0); > + refs[i] = cur_ref; > + } > + > + ret = 0; return 0? > + > +out: > + gnttab_free_grant_references(priv_gref_head); > + return ret; > +} > +