From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Christian_K=c3=b6nig?= Subject: Re: PCIe P2P access to GPU memory Date: Wed, 3 Oct 2018 15:37:42 +0200 Message-ID: <8433acf4-456e-c994-4dcc-3240f3190f71@gmail.com> References: <856f3ee3-5f5c-f8a3-d9e2-d8f894aaf967@amd.com> <20181003090607.GA23685@phenom.ffwll.local> Reply-To: christian.koenig@amd.com Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by gabe.freedesktop.org (Postfix) with ESMTPS id 06E4C6E4C7 for ; Wed, 3 Oct 2018 13:37:46 +0000 (UTC) Received: by mail-wr1-x441.google.com with SMTP id y16so6192486wrw.3 for ; Wed, 03 Oct 2018 06:37:45 -0700 (PDT) In-Reply-To: <20181003090607.GA23685@phenom.ffwll.local> 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: Daniel Vetter , "Koenig, Christian" Cc: "dirk.eibach@googlemail.com" , dri-devel List-Id: dri-devel@lists.freedesktop.org QW0gMDMuMTAuMjAxOCB1bSAxMTowNiBzY2hyaWViIERhbmllbCBWZXR0ZXI6Cj4gT24gV2VkLCBP Y3QgMDMsIDIwMTggYXQgMDg6NTQ6NDRBTSArMDAwMCwgS29lbmlnLCBDaHJpc3RpYW4gd3JvdGU6 Cj4+IEFtIDAzLjEwLjIwMTggdW0gMDk6MTQgc2NocmllYiBEYW5pZWwgVmV0dGVyOgo+Pj4gT24g U2F0LCBTZXAgMjksIDIwMTggYXQgOToyNyBBTSBLb2VuaWcsIENocmlzdGlhbgo+Pj4gPENocmlz dGlhbi5Lb2VuaWdAYW1kLmNvbT4gd3JvdGU6Cj4+Pj4gVGhpcyBpcyB3b3JrIGluIHByb2dyZXNz Lgo+Pj4+Cj4+Pj4gSSBwdWJsaXNoZWQgcGF0Y2hlcyB0byBlbmFibGUgRE1BX2J1ZiBQMlAgYSBm ZXcgbW9udGhzIGFnbywgYnV0IG5vdyBJJ20gd2FpdGluZyBmb3IgdGhlIFBDSSBzdWJzeXN0ZW0g dG8gcGljayB1cCBjb3JlIHN1cHBvcnQgZm9yIHRoaXMuCj4+Pj4KPj4+PiBJIGNhbiBwcmVwYXJl IHlvdSBhIGJyYW5jaCBiYXNlZCBvbiBjdXJyZW50IHVwc3RyZWFtIGtlcm5lbCBuZXh0IHdlZWsg aWYgeW91IHdhbnQgdG8gdGVzdCB0aGlzLgo+Pj4gVGhyZWFkIGhpamFjaywgc2luY2UgSSBqdXN0 IHJlYWQgdGhlIGx3biBhcnRpY2xlIG9uIHAycCBmb3Igc3RvcmFnZSBmb2xrczoKPj4+Cj4+PiBo dHRwczovL2x3bi5uZXQvQXJ0aWNsZXMvNzY3MjgxLwo+Pj4KPj4+IFRvdGFsbHkgZG9lc24ndCBt YXRjaCB3aGF0IEkgcmVtZW1iZXIgb2YgeW91ciBkbWEtYnVmIHAycCB3b3JrLiBEbyB3ZQo+Pj4g bmVlZCB0byByZXdvcmssIG9yIGlzIHRoaXMgc29tZSBraW5kIG9mIGhpZ2hlci1sZXZlbCBpbnRl cmZhY2Ugb24gdG9wCj4+PiBvZiB0aGUgcmF3IHAycCBwY2kgc3R1ZmY/IE9yIGRvIEkgbWlzcmVt ZW1iZXIuCj4+IFRoZSBQMlAgZnJvbSB0aGUgc3RvcmFnZSBmb2xrcyBhcmUgc29tZSBtaXggb2Yg cmF3IHAycCBjYXBhYmlsaXR5Cj4+IGRldGVjdGlvbiBmb3IgUENJIGFuZCBoaWdoZXIgbGV2ZWwg aW50ZXJmYWNlLgo+Pgo+PiBJJ20gYWN0dWFsbHkgd2FpdGluZyBmb3IgdGhhdCBzdHVmZiB0byBs YW5kIHRvIGV4dHJhY3QgdGhlIHAycAo+PiBjYXBhYmlsaXR5IGRldGVjdGlvbiBhbmQgdXNlIGl0 IGZvciB0aGlzIERNQS1idWYgc3R1ZmYgYXMgd2VsbC4KPj4KPj4gQWx0ZXJuYXRpdmUgd291bGQg YmUgdG8gY29udmluY2UgTG9nYW4gdG8gZXh0cmFjdCB0aGUgY2FwYWJpbGl0eQo+PiBkZXRlY3Rp b24gaW4gaGlzIHBhdGNoIHNldCBhcyB3ZWxsLCBidXQgc28gZmFyIGhlIHdhc24ndCB2ZXJ5IGtl ZW4gYWJvdXQKPj4gdGhhdC4KPiBTbyBubyBwbGFuIHRvIG1ha2UgZG1hLWJ1ZiBzb21lIGtpbmQg b2Ygb3JjaGVzdHJhdG9yIGFuZCB1c2UgdGhlIHAycAo+IG1hcF9zZyBzdHVmZj8KCk5vdCBzdXJl IGFib3V0IHRoYXQgeWV0LiBEaWRuJ3QgaGFkIHRpbWUgdG8gdGFrZSBhIGNsb3NlciBsb29rLgoK Q2hyaXN0aWFuLgoKPiAgIFRoYXQgc2VlbXMgdG8gYmUgdGhlIG5ldy9hZGRpdGlvbmFsIGJpdHMg SSBoYXZlbid0IHNlZW4geWV0LAo+IGFuZCBJJ20gd29uZGVyZWQgaG93IHdlIHNob3VsZCBmaXQg ZG1hLWJ1ZiBpbnRvIHRoYXQgcGljdHVyZS4KPiAtRGFuaWVsCj4KPj4gQ2hyaXN0aWFuLgo+Pgo+ Pj4gVGhhbmtzLCBEYW5pZWwKPj4+Cj4+Pj4gUmVnYXJkcywKPj4+PiBDaHJpc3RpYW4uCj4+Pj4K Pj4+PiBBbSAyOS4wOS4yMDE4IDA5OjAxIHNjaHJpZWIgRGlyayBFaWJhY2ggPGRpcmsuZWliYWNo QGdvb2dsZW1haWwuY29tPjoKPj4+PiBJIHdhbnQgdG8gYWNjZXNzIEdQVSBWUkFNIHZpYSBQQ0ll IFAyUCBhY2Nlc3MsIGxpa2UgRGlyZWN0R01BIGJ1dCB3aXRoCj4+Pj4gbWFpbmxpbmUgZHJpdmVy cy4KPj4+PiBJIGNhbiBhY3F1aXJlIGEgZG1hYnVmIGZyb20gdGhlIEdQVSBhbmQgcGFzcyBpdCB0 byBteSBQQ0llCj4+Pj4gZnJhbWVncmFiYmVyLiBCdXQgSSBkb24ndCBzZWUgYSB3YXkgdG8gZ2V0 IHRoZSBQQ0llIGJ1cyBhZGRyZXNzIG9mIHRoZQo+Pj4+IHZpZGVvIG1lbW9yeSB3aGljaCBJIG5l ZWQgZm9yIHRoZSBQMlAgdHJhbnNmZXIuIElzIHRoZXJlIGFscmVhZHkgYW55Cj4+Pj4gaW5mcmFz dHJ1Y3R1cmUgaW4gcGxhY2UgZm9yIGRvaW5nIHRoaXM/IElmIG5vdCwgd2hhdCB3b3VsZCBiZSB0 aGUKPj4+PiByaWdodCB3YXkgdG8gaW1wbGVtZW50IHRoaXM/IEFkZCBhbm90aGVyIGNhbGxiYWNr IHRvIHRoZSBkbWFidWYKPj4+PiBzdHJ1Y3Q/Cj4+Pj4KPj4+PiBDaGVlcnMKPj4+PiBEaXJrCj4+ Pj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KPj4+PiBk cmktZGV2ZWwgbWFpbGluZyBsaXN0Cj4+Pj4gZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9y Zwo+Pj4+IGh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJp LWRldmVsCj4+PgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3Jn Cmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVs Cg==