From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Subject: Re: [PATCH v2 04/13] gpu: host1x: Use direct DMA with IOMMU API usage Date: Mon, 28 Jan 2019 17:30:28 +0300 Message-ID: <8d10a092-e970-2bc1-5d6c-81fbf0472abb@gmail.com> References: <20190124180254.20080-1-thierry.reding@gmail.com> <20190124180254.20080-5-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9727E6E0DB for ; Mon, 28 Jan 2019 14:30:35 +0000 (UTC) Received: by mail-pg1-x542.google.com with SMTP id m1so7278705pgq.8 for ; Mon, 28 Jan 2019 06:30:35 -0800 (PST) In-Reply-To: <20190124180254.20080-5-thierry.reding@gmail.com> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Thierry Reding Cc: linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, Mikko Perttunen List-Id: dri-devel@lists.freedesktop.org MjQuMDEuMjAxOSAyMTowMiwgVGhpZXJyeSBSZWRpbmcg0L/QuNGI0LXRgjoKPiBGcm9tOiBUaGll cnJ5IFJlZGluZyA8dHJlZGluZ0BudmlkaWEuY29tPgo+IAo+IElmIHdlIHVzZSB0aGUgSU9NTVUg QVBJIGRpcmVjdGx5IHRvIG1hcCBidWZmZXJzIGludG8gaG9zdDF4JyBJT1ZBIHNwYWNlLAo+IHdl IG11c3QgbWFrZSBzdXJlIHRoYXQgdGhlIERNQSBBUEkgZG9lc24ndCBhbHJlYWR5IHNldCB1cCBh IG1hcHBpbmcsIG9yCj4gZWxzZSB0cmFuc2xhdGlvbiB3aWxsIGZhaWwuCj4gCj4gVGhlIGRpcmVj dCBETUEgQVBJIGFsbG93cyB1cyB0byBhbGxvY2F0ZSBtZW1vcnkgdGhhdCB3aWxsIG5vdCBiZSBt YXBwZWQKPiB0aHJvdWdoIGFuIElPTU1VIGF1dG9tYXRpY2FsbHkuCj4gCj4gU2lnbmVkLW9mZi1i eTogVGhpZXJyeSBSZWRpbmcgPHRyZWRpbmdAbnZpZGlhLmNvbT4KPiAtLS0KPiAgZHJpdmVycy9n cHUvaG9zdDF4L2NkbWEuYyB8IDExICsrKysrKysrLS0tCj4gIDEgZmlsZSBjaGFuZ2VkLCA4IGlu c2VydGlvbnMoKyksIDMgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1 L2hvc3QxeC9jZG1hLmMgYi9kcml2ZXJzL2dwdS9ob3N0MXgvY2RtYS5jCj4gaW5kZXggOTFkZjUx ZTYzMWIyLi5jY2RlMjNhMDEwOWMgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvaG9zdDF4L2Nk bWEuYwo+ICsrKyBiL2RyaXZlcnMvZ3B1L2hvc3QxeC9jZG1hLmMKPiBAQCAtMTksNiArMTksNyBA QAo+ICAKPiAgI2luY2x1ZGUgPGFzbS9jYWNoZWZsdXNoLmg+Cj4gICNpbmNsdWRlIDxsaW51eC9k ZXZpY2UuaD4KPiArI2luY2x1ZGUgPGxpbnV4L2RtYS1kaXJlY3QuaD4KPiAgI2luY2x1ZGUgPGxp bnV4L2RtYS1tYXBwaW5nLmg+Cj4gICNpbmNsdWRlIDxsaW51eC9ob3N0MXguaD4KPiAgI2luY2x1 ZGUgPGxpbnV4L2ludGVycnVwdC5oPgo+IEBAIC03MCw2ICs3MSw3IEBAIHN0YXRpYyB2b2lkIGhv c3QxeF9wdXNoYnVmZmVyX2Rlc3Ryb3koc3RydWN0IHB1c2hfYnVmZmVyICpwYikKPiAgICovCj4g IHN0YXRpYyBpbnQgaG9zdDF4X3B1c2hidWZmZXJfaW5pdChzdHJ1Y3QgcHVzaF9idWZmZXIgKnBi KQo+ICB7Cj4gKwl1bnNpZ25lZCBsb25nIGF0dHJzID0gRE1BX0FUVFJfV1JJVEVfQ09NQklORTsK PiAgCXN0cnVjdCBob3N0MXhfY2RtYSAqY2RtYSA9IHBiX3RvX2NkbWEocGIpOwo+ICAJc3RydWN0 IGhvc3QxeCAqaG9zdDF4ID0gY2RtYV90b19ob3N0MXgoY2RtYSk7Cj4gIAlzdHJ1Y3QgaW92YSAq YWxsb2M7Cj4gQEAgLTkxLDggKzkzLDggQEAgc3RhdGljIGludCBob3N0MXhfcHVzaGJ1ZmZlcl9p bml0KHN0cnVjdCBwdXNoX2J1ZmZlciAqcGIpCj4gIAo+ICAJCXNpemUgPSBpb3ZhX2FsaWduKCZo b3N0MXgtPmlvdmEsIHNpemUpOwo+ICAKPiAtCQlwYi0+bWFwcGVkID0gZG1hX2FsbG9jX3djKGhv c3QxeC0+ZGV2LCBzaXplLCAmcGItPnBoeXMsCj4gLQkJCQkJICBHRlBfS0VSTkVMKTsKPiArCQlw Yi0+bWFwcGVkID0gZG1hX2RpcmVjdF9hbGxvYyhob3N0MXgtPmRldiwgc2l6ZSwgJnBiLT5waHlz LAo+ICsJCQkJCSAgICAgIEdGUF9LRVJORUwsIGF0dHJzKTsKPiAgCQlpZiAoIXBiLT5tYXBwZWQp Cj4gIAkJCXJldHVybiAtRU5PTUVNOwo+ICAKPiBAQCAtMTI3LDcgKzEyOSwxMCBAQCBzdGF0aWMg aW50IGhvc3QxeF9wdXNoYnVmZmVyX2luaXQoc3RydWN0IHB1c2hfYnVmZmVyICpwYikKPiAgaW9t bXVfZnJlZV9pb3ZhOgo+ICAJX19mcmVlX2lvdmEoJmhvc3QxeC0+aW92YSwgYWxsb2MpOwo+ICBp b21tdV9mcmVlX21lbToKPiAtCWRtYV9mcmVlX3djKGhvc3QxeC0+ZGV2LCBzaXplLCBwYi0+bWFw cGVkLCBwYi0+cGh5cyk7Cj4gKwlpZiAoaG9zdDF4LT5kb21haW4pCj4gKwkJZG1hX2RpcmVjdF9m cmVlKGhvc3QxeC0+ZGV2LCBzaXplLCBwYi0+bWFwcGVkLCBwYi0+cGh5cywgYXR0cnMpOwo+ICsJ ZWxzZQo+ICsJCWRtYV9mcmVlX3djKGhvc3QxeC0+ZGV2LCBzaXplLCBwYi0+bWFwcGVkLCBwYi0+ cGh5cyk7Cj4gIAo+ICAJcmV0dXJuIGVycjsKPiAgfQo+IAoKVGhpcyB2YXJpYW50IGxvb2tzIGdv b2QgZm9yIHRoZSBjdXJyZW50IHVwc3RyZWFtIGNvZGUuIEFsdGVybmF0aXZlbHkgd2UgY291bGQg Y2hlY2sgdGhlIGRvbWFpbi0+dHlwZT09SU9NTVVfRE9NQUlOX0RNQSBhbmQgc2tpcCBJT01NVSBp bml0aWFsaXphdGlvbiBvbiBwcm9iZS4KCkkgbWF5IHRlc3QgdGhhdCBub3RoaW5nIGJyZWFrcyB3 aXRoIHRoaXMgc2VyaWVzIGZvciBvbGRlciBUZWdyYSdzIG9uY2UgaXQgYWxsIHdpbGwgYXBwZWFy IGluIC1uZXh0LiBQbGVhc2UgYWRkcmVzcyBNaWtrbydzIHJldmlldy1jb21tZW50cyBhbmQgcHVz aCB0aGUgcGF0Y2hlcyBvbmNlIHJlYWR5LgoKUmV2aWV3ZWQtYnk6IERtaXRyeSBPc2lwZW5rbyA8 ZGlnZXR4QGdtYWlsLmNvbT4KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0 b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJp LWRldmVsCg==