From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Stultz Subject: Re: [EARLY RFC][PATCH] dma-buf: Add dma-buf heaps framework Date: Tue, 26 Feb 2019 11:21:30 -0800 Message-ID: References: <20190225143604.27511-1-afd@ti.com> <2be71bd3-c5c9-4259-c780-3c115965ee01@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by gabe.freedesktop.org (Postfix) with ESMTPS id 086316E013 for ; Tue, 26 Feb 2019 19:21:44 +0000 (UTC) Received: by mail-wr1-x443.google.com with SMTP id i12so15279066wrw.0 for ; Tue, 26 Feb 2019 11:21:43 -0800 (PST) In-Reply-To: <2be71bd3-c5c9-4259-c780-3c115965ee01@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: "Andrew F. Davis" Cc: Chenbo Feng , Alistair Strachan , Liam Mark , dri-devel List-Id: dri-devel@lists.freedesktop.org T24gVHVlLCBGZWIgMjYsIDIwMTkgYXQgNjo0NyBBTSBBbmRyZXcgRi4gRGF2aXMgPGFmZEB0aS5j b20+IHdyb3RlOgo+IE9uIDIvMjYvMTkgMTI6MjAgQU0sIEpvaG4gU3R1bHR6IHdyb3RlOgo+ID4g T24gTW9uLCBGZWIgMjUsIDIwMTkgYXQgNjozNiBBTSBBbmRyZXcgRi4gRGF2aXMgPGFmZEB0aS5j b20+IHdyb3RlOgo+ID4+IEl0IGFsbCBuZWVkcyBhIGJpdCBtb3JlIHdvcmssIGFuZCBJJ20gc3Vy ZSBJJ2xsIGZpbmQgbWlzc2luZyBwYXJ0cyB3aGVuCj4gPj4gSSBhZGQgc29tZSBtb3JlIGhlYXBz LCBidXQgaG9wZWZ1bGx5IHRoaXMgZnJhbWV3b3JrIGlzIHNpbXBsZSBlbm91Z2ggdGhhdAo+ID4+ IGl0IGRvZXMgbm90IGltcGVkZSB0aGUgaW1wbGVtZW50YXRpb24gb2YgYWxsIGZ1bmN0aW9uYWxp dHkgb25jZSBwcm92aWRlZAo+ID4+IGJ5IElPTiAoc2hyaW5rZXIsIGRlbGF5ZWQgZnJlZSksIG5v ciBhbnkgbmV3IGZ1bmN0aW9uYWxpdHkgbmVlZGVkIGZvcgo+ID4+IGZ1dHVyZSBoZWFwIGV4cG9y dGluZyBkZXZpY2VzLgo+ID4KPiA+IEkgdG9vayB5b3VyIHBhdGNoIGhlcmUsIG1hZGUgc29tZSBz bWFsbCByZXdvcmtzIGFzIEkgbWVudGlvbmVkCj4gPiBlYXJsaWVyLCBhbmQgdHJpZWQgdG8gYWRk IHNvbWUgZ2VuZXJpYyBoZWxwZXJzIGFuZCB0aGUgc3lzdGVtIGFuZCBjbWEKPiA+IGhlYXBzIGlu dGVncmF0ZWQuCj4gPgo+ID4gWW91IGNhbiBmaW5kIHRoZSBjaGFuZ2VzIGFkZGVkIG9uIHRvcCBv ZiB5b3VyIHBhdGNoIGhlcmU6Cj4gPiBodHRwczovL2dpdC5saW5hcm8ub3JnL3Blb3BsZS9qb2hu LnN0dWx0ei9hbmRyb2lkLWRldi5naXQvbG9nLz9oPWRldi9kbWEtYnVmLWhlYXAKPiA+Cj4gPiBJ IHByb3Bvc2Ugd2Ugc2hvdWxkIHNxdWlzaCBkb3duIHRoZSBmaXJzdCB0aHJlZSBjaGFuZ2VzIGRv d24gaW50byB0aGUKPiA+IGNvcmUgcGF0Y2ggaWYgeW91IGFncmVlLgo+ID4KPgo+IEFsbCBsb29r cyBnb29kIHRvIG1lLiBPbmUgdGhpbmcgSSdtIHN0aWxsIHVuc3VyZSBvZiBpcyBtb3Zpbmcgc3Ry dWN0Cj4gZG1hX2hlYXAgb3V0IGludG8gdGhlIHB1YmxpYyBpbnRlcmZhY2UgaGVhZGVyLiBUaGF0 IHN0cnVjdCBjb250YWlucwo+IGZyYW1ld29yayBpbnRlcm5hbCBvbmx5IGluZm8gKGRldmljZSBu b2Rlcywgc3RhdHMsIGV0Yy4pIHRoYXQgc2hvdWxkIG5vdAo+IGJlIGV4cG9zZWQgdG8gdGhlIG91 dHNpZGUgd29ybGQuIEkgdGhpbmsgb2YgdGhlbSBhcyBwcml2YXRlIG1lbWJlcnMgb2YKPiBvdXIg Y2xhc3MgKHRvbyBtdWNoIEMrKyB3b3JrIGxhdGVseSksIGlmIHdlIG5lZWQgdG8gZXhwb3NlIGFu eSBtZW1iZXJzCj4gb2YgdGhhdCBzdHJ1Y3QgdGhlbiB3ZSBjYW4gYWRkIGFjY2Vzc29ycyBhcyBu ZWVkZWQuCgpIcm0uIFRoZSB0cm91YmxlIGlzIHRoYXQgdGhlIGhlYXBzIG5lZWQgc29tZSB3YXkg dG8gaW5kZXggYmFjayB0bwp0aGVpciBvd24gcGVyLWhlYXAgZGF0YSAoc2ltaWxhciB0byBob3cg dGhlIGhlYXBzIGFsc28gbmVlZCB0aGVpciBvd24KcGVyLWJ1ZmZlciBkYXRhKSBsaWtlIHRoZSBj bWEgc3RydWN0IGZvciB0aGUgc3BlY2lmaWMgY21hIHJlZ2lvbiwgZm9yCmluc3RhbmNlLiBNYXli ZSB0aGlzIGRvZXNuJ3QgYWRkcmVzcyB5b3VyIGNvbmNlcm4sIGJ1dCBvbmUgd2F5IEkndmUKZGVh bHQgd2l0aCAic3Vic3lzdGVtIGludGVybmFsIiBzdHJ1Y3R1cmVzIGlzIHRvIGhhdmUgbG9jYWwg LmggZmlsZXMsCnNvIG9ubHkgdGhlIGhlYXAgaW1wbGVtZW50YXRpb25zIGNhbiBzZWUgaXQuICBJ IG1heSBiZSBtaXNzaW5nIGEKZGlmZmVyZW50IGFwcHJvYWNoIHRoYXQgeW91ciB0aGlua2luZyBv Ziwgc28gcGxlYXNlIGxldCBtZSBrbm93LiA6KQoKPiA+IFRoZSBoZWxwZXIgZnVuY3Rpb25zIG5l ZWQgc29tZSB3b3JrIGFuZCBjbGVhbnVwLCByaWdodCBub3cgSSdtIG9ubHkKPiA+IGV4cG9zaW5n IHRoZSBkbWFidWYgb3BzIGFuZCByZWFsaXN0aWNhbGx5IGZvbGtzIHdpbGwgcHJvYmFibHkgd2Fu dCB0bwo+ID4gZmlsbCBwYXJ0IG9mIHRoZSBvcHMgd2l0aCBjdXN0b20gdGhpbmdzLgo+ID4KPgo+ IFllcywgdGhlIGN1cnJlbnQgc2V0IG9mIGhlbHBlciBkbWEtYnVmLW9wcyB3b3JrIHdlbGwgZm9y IHByZS1hbGxvY2F0ZWQKPiBwYWdlLXN0cnVjdC1iYWNrZWQgbWVtb3J5IGJ1ZmZlcnMgKGJhc2lj YWxseSBzZyBsaXN0KS4gRm9yIGJ1ZmZlcnMKPiBhbGxvY2F0ZWQgb3V0c2lkZSBvZiBub3JtYWwg UkFNLCBzZWN1cmUgKHVubWFwcGVkKSBoZWFwcywgYW5kIGF0dGFjaAo+IHRpbWUgYWxsb2NhdGVk IGhlYXBzIGFsbCBraW5kYSBicmVhayBkb3duIHdpdGggdGhlIGN1cnJlbnQgaGVscGVycy4gQnV0 Cj4gdGhhdCdzIHRoZSBiZXN0IHBhcnQgb2YgaGVscGVycywgeW91IGRvbid0IG5lZWQgdG8gdXNl IHRoZW0gaWYgeW91IGRvbid0Cj4gd2FudCA6KQo+Cj4gPiBJdCBib290cyB3LyBBT1NQLCBhbmQg YWxsb2NhdGlvbnMgc2VlbSB0byB3b3JrLCBidXQgdGhlcmUncyBzb21ldGhpbmcKPiA+IHdyb25n IHdpdGggdGhlIGRtYWJ1ZiBtbWFwaW5nIHdoaWNoIGNhc3VlcyB0aGUgaG9tZXNjcmVlbiB0byBj cmFzaAo+ID4gb3ZlciBhbmQgb3Zlci4KPiA+ICh1c2VybGFuZCBwYXRjaGVzIHVwZGF0ZWQgaGVy ZToKPiA+IGh0dHBzOi8vYW5kcm9pZC1yZXZpZXcuZ29vZ2xlc291cmNlLmNvbS9jL2RldmljZS9s aW5hcm8vaGlrZXkvKy85MDk0MzYpCj4gPgo+Cj4gSW50ZXJlc3RpbmcsIEkgd29uZGVyIGlmIHRo ZSBjYWNoaW5nIHN0dWZmIGlzIG5vdCByaWdodCBoZXJlLCBJJ2xsIHNlZQo+IGlmIEkgY2FuIGdl dCB0aGlzIHdvcmtpbmcgb24gbXkgc2lkZSAoQU9TUCBvbiBCZWFnbGUgeDE1KS4KPgoKTGV0IG1l IGtub3cgaWYgeW91IGZpZ3VyZSBhbnl0aGluZyBvdXQsIEknbGwgYWxzbyBiZSBsb29raW5nIGF0 IHRoaXMgdG9kYXkuCgpJIGFsc28gcmVhbGl6ZWQgc29tZSBvZiBCZW5ham1pbidzIGVycm9yIHBh dGggaW1wcm92ZW1lbnRzIGFyZSBnb2luZwp0byBiZSBoYXJkIHRvIGZpeCB3LyBteSBjdXJyZW50 IGNvZGUsIHNwZWNpZmljYWxseSBoYXZpbmcgdGhlIGFsbG9jYXRlCm9wIGRvIHRoZSBhbGxvY2F0 aW9uIG9mIHRoZSBkbWFfaGVhcF9idWZmZXIgKHNpbmNlIHdlIGRvbid0IGhhdmUgYQpmcmVlIG9w LCBpZiBzb21ldGhpbmcgZmFpbHMgY3JlYXRpbmcgdGhlIGRtYWJ1ZiBmZCBpbiB0aGUgY29yZSwg d2UKZG9uJ3QgaGF2ZSBhIGhvb2sgdG8gcmVsZWFzZSB0aGUgZG1hX2hlYXBfYnVmZmVyIGFuZCBo ZWFwIHByaXZhdGUKZGF0YSkuCgp0aGFua3MKLWpvaG4KX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxA bGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxt YW4vbGlzdGluZm8vZHJpLWRldmVs