From mboxrd@z Thu Jan 1 00:00:00 1970 From: okaya-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org Subject: Re: [PATCH 1/2] drm/prime: Iterate SG DMA addresses separately Date: Thu, 12 Apr 2018 07:48:16 -0400 Message-ID: References: <0901c8c3b9adbcb851ba58dfca6b16d12ccbcb0f.1523465719.git.robin.murphy@arm.com> <67b1875d-9f77-5fb8-bfc6-53d34c15ab16@amd.com> <1523524317.4981.24.camel@pengutronix.de> <58ef1aab-6c3a-8e69-0a7e-98218ba9fe96@amd.com> <1523526540.4981.26.camel@pengutronix.de> <9e55076e-56dd-d553-63d6-2ce018199f84@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <9e55076e-56dd-d553-63d6-2ce018199f84-5C7GfCeVMHo@public.gmane.org> List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "amd-gfx" To: =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: alexander.deucher-5C7GfCeVMHo@public.gmane.org, Robin Murphy , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, Lucas Stach T24gMjAxOC0wNC0xMiAwNjozMywgQ2hyaXN0aWFuIEvDtm5pZyB3cm90ZToKPiBBbSAxMi4wNC4y MDE4IHVtIDExOjQ5IHNjaHJpZWIgTHVjYXMgU3RhY2g6Cj4+IEFtIERvbm5lcnN0YWcsIGRlbiAx Mi4wNC4yMDE4LCAxMTozNSArMDIwMCBzY2hyaWViIENocmlzdGlhbiBLw7ZuaWc6Cj4+PiBBbSAx Mi4wNC4yMDE4IHVtIDExOjExIHNjaHJpZWIgTHVjYXMgU3RhY2g6Cj4+Pj4gQW0gTWl0dHdvY2gs IGRlbiAxMS4wNC4yMDE4LCAyMDoyNiArMDIwMCBzY2hyaWViIENocmlzdGlhbiBLw7ZuaWc6Cj4+ Pj4+IEFtIDExLjA0LjIwMTggdW0gMTk6MTEgc2NocmllYiBSb2JpbiBNdXJwaHk6Cj4+Pj4+PiBG b3IgZG1hX21hcF9zZygpLCBETUEgQVBJIGltcGxlbWVudGF0aW9ucyBhcmUgZnJlZSB0byBtZXJn ZSAKPj4+Pj4+IGNvbnNlY3V0aXZlCj4+Pj4+PiBzZWdtZW50cyBpbnRvIGEgc2luZ2xlIERNQSBt YXBwaW5nIGlmIGNvbmRpdGlvbnMgYXJlIHN1aXRhYmxlLCAKPj4+Pj4+IHRodXMgdGhlCj4+Pj4+ PiByZXN1bHRpbmcgRE1BIGFkZHJlc3NlcyBtYXkgYmUgcGFja2VkIGludG8gZmV3ZXIgZW50cmll cyB0aGFuCj4+Pj4+PiB0dG0tPnNnLT5uZW50cyBpbXBsaWVzLgo+Pj4+Pj4gCj4+Pj4+PiBkcm1f cHJpbWVfc2dfdG9fcGFnZV9hZGRyX2FycmF5cygpIGRvZXMgbm90IGFjY291bnQgZm9yIHRoaXMs IAo+Pj4+Pj4gbWVhbmluZwo+Pj4+Pj4gaXRzIGNhbGxlcnMgZWl0aGVyIGhhdmUgdG8gcmVqZWN0 IHRoZSAwIDwgY291bnQgPCBuZW50cyBjYXNlIG9yIAo+Pj4+Pj4gcmlzawo+Pj4+Pj4gZ2V0dGlu ZyBib2d1cyBhZGRyZXNzZXMgYmFjayBsYXRlci4gRm9ydHVuYXRlbHkgdGhpcyBpcyByZWxhdGl2 ZWx5IAo+Pj4+Pj4gZWFzeQo+Pj4+Pj4gdG8gZGVhbCB3aXRoIGhhdmluZyB0byByZWppZyBzdHJ1 Y3R1cmVzIHRvIGFsc28gc3RvcmUgdGhlIG1hcHBlZCAKPj4+Pj4+IGNvdW50LAo+Pj4+Pj4gc2lu Y2UgdGhlIHRvdGFsIERNQSBsZW5ndGggc2hvdWxkIHN0aWxsIGJlIGVxdWFsIHRvIHRoZSB0b3Rh bCAKPj4+Pj4+IGJ1ZmZlcgo+Pj4+Pj4gbGVuZ3RoLiBBbGwgd2UgbmVlZCBpcyBhIHNlcGFyYXRl IHNjYXR0ZXJsaXN0IGN1cnNvciB0byBpdGVyYXRlIAo+Pj4+Pj4gdGhlIERNQQo+Pj4+Pj4gYWRk cmVzc2VzIHNlcGFyYXRlbHkgZnJvbSB0aGUgQ1BVIGFkZHJlc3Nlcy4KPj4+Pj4gTWhtLCBJIHRo aW5rIEkgbGlrZSBTaW5hcyBhcHByb2FjaCBiZXR0ZXIuCj4+Pj4+IAo+Pj4+PiBTZWUgdGhlIGhh cmR3YXJlIGFjdHVhbGx5IG5lZWRzIHRoZSBkbWFfYWRkcmVzcyBvbiBhIHBhZ2UgYnkgcGFnZSAK Pj4+Pj4gYmFzaXMuCj4+Pj4+IAo+Pj4+PiBKb2luaW5nIG11bHRpcGxlIGNvbnNlY3V0aXZlIHBh Z2VzIGludG8gb25lIGVudHJ5IGlzIGp1c3QgCj4+Pj4+IGFkZGl0aW9uYWwKPj4+Pj4gb3Zlcmhl YWQgd2hpY2ggd2UgZG9uJ3QgbmVlZC4KPj4+PiBCdXQgc2V0dGluZyBNQVhfU0VHTUVOVF9TSVpF IHdpbGwgcHJvYmFibHkgcHJldmVudCBhbiBJT01NVSB0aGF0IAo+Pj4+IG1pZ2h0Cj4+Pj4gYmUg aW4gZnJvbnQgb2YgeW91ciBHUFUgdG8gbWFwIGxhcmdlIHBhZ2VzIGFzIHN1Y2gsIGNhdXNpbmcg Cj4+Pj4gYWRkaXRpb25hbAo+Pj4+IG92ZXJoZWFkIGJ5IG1lYW5zIG9mIGFkZGl0aW9uYWwgVExC IG1pc3NlcyBhbmQgcGFnZSB3YWxrcyBvbiB0aGUgCj4+Pj4gSU9NTVUKPj4+PiBzaWRlLgo+Pj4+ IAo+Pj4+IEFuZCB3b3VsZG4ndCB5b3UgbGlrZSB0byB1c2UgaHVnZSBwYWdlcyBhdCB0aGUgR1BV IHNpZGUsIGlmIHRoZSAKPj4+PiBJT01NVQo+Pj4+IGFscmVhZHkgcHJvdmlkZXMgeW91IHRoZSBz ZXJ2aWNlIG9mIHByb2R1Y2luZyBvbmUgbGFyZ2UgY29uc2VjdXRpdmUKPj4+PiBhZGRyZXNzIHJh bmdlLCByYXRoZXIgdGhhbiBtYXBwaW5nIHRoZW0gdmlhIGEgbnVtYmVyIG9mIHNtYWxsIHBhZ2Vz Pwo+Pj4gTm8sIEkgd291bGRuJ3QgbGlrZSB0byB1c2UgdGhhdC4gV2UncmUgYWxyZWFkeSB1c2lu ZyB0aGF0IDopCj4+PiAKPj4+IEJ1dCB3ZSB1c2UgaHVnZSBwYWdlcyBieSBhbGxvY2F0aW5nIGNv bnNlY3V0aXZlIGNodW5rcyBvZiBtZW1vcnkgc28gCj4+PiB0aGF0Cj4+PiBib3RoIHRoZSBDUFUg YXMgd2VsbCBhcyB0aGUgR1BVIGNhbiBpbmNyZWFzZSB0aGVpciBUTEIgaGl0IHJhdGUuCj4+IEkn bSBub3QgY29udmluY2VkIHRoYXQgdGhpcyBpcyBhIHVuaXZlcnNhbCB3aW4uIE1hbnkgR1BVIGJ1 ZmZlcnMgCj4+IGFyZW4ndAo+PiBhY2Nlc3NlZCBieSB0aGUgQ1BVIGFuZCBhbGxvY2F0aW5nIGh1 Z2UgcGFnZXMgcHV0cyBtdWNoIG1vcmUgc3RyYWluIG9uCj4+IHRoZSBrZXJuZWwgTU0gc3Vic3lz dGVtLgo+IAo+IFllYWgsIHdlIGluZGVlZCBzZWUgdGhlIGV4dHJhIG92ZXJoZWFkIGR1cmluZyBh bGxvY2F0aW9uLgo+IAo+Pj4gV2hhdCBjdXJyZW50bHkgaGFwcGVucyBpcyB0aGF0IHRoZSBETUEg c3Vic3lzdGVtIHRyaWVzIHRvIGNvYWxlc2NlCj4+PiBtdWx0aXBsZSBwYWdlcyBpbnRvIG9uIFNH IGVudHJ5IGFuZCB3ZSBkZS1jb2FsZXNjZSB0aGF0IGluc2lkZSB0aGUKPj4+IGRyaXZlciBhZ2Fp biB0byBjcmVhdGUgb3VyIHJhbmRvbSBhY2Nlc3MgYXJyYXkuCj4+IEkgZ3Vlc3MgdGhlIHJpZ2h0 IHRoaW5nIHdvdWxkIGJlIHRvIGhhdmUgYSBmbGFnIHRoYXQgdGVsbHMgdGhlIHRoZSBETUEKPj4g aW1wbGVtZW50YXRpb24gdG8gbm90IGNvYWxlc2NlIHRoZSBlbnRyaWVzLiBCdXQgKGFiLSl1c2lu ZyBtYXggc2VnbWVudAo+PiBzaXplIHRlbGxzIHRoZSBETUEgQVBJIHRvIHNwbGl0IHRoZSBzZWdt ZW50cyBpZiB0aGV5IGFyZSBsYXJnZXIgdGhhbgo+PiB0aGUgZ2l2ZW4gc2l6ZSwgd2hpY2ggaXMg cHJvYmFibHkgbm90IHdoYXQgeW91IHdhbnQgZWl0aGVyIGFzIHlvdSBub3cKPj4gbmVlZCB0byBj b2FsZXNjZSB0aGUgc2VnbWVudHMgYWdhaW4gd2hlbiB5b3UgYXJlIG1hcHBpbmcgcmVhbCBodWdl Cj4+IHBhZ2VzLgo+IAo+IE5vLCBldmVuIHdpdGggaHVnZSBwYWdlcyBJIG5lZWQgYW4gYXJyYXkg d2l0aCBldmVyeSBzaW5nbGUgZG1hIGFkZHJlc3MKPiBmb3IgYSA0SyBwYWdlcyAob3Igd2hhdGV2 ZXIgdGhlIG5vcm1hbCBwYWdlIHNpemUgaXMpLgo+IAo+IFRoZSBwcm9ibGVtIGlzIHRoYXQgSSBu ZWVkIGEgcmFuZG9tIGFjY2VzcyBhcnJheSBmb3IgdGhlIERNQQo+IGFkZHJlc3NlcywgZXZlbiB3 aGVuIHRoZXkgYXJlIGNvbnRpbnVvdXNseS4KPiAKPiBJIGFncmVlIHRoYXQgbWF4IHNlZ21lbnQg c2l6ZSBpcyBhIGJpdCB1Z2x5IGhlcmUsIGJ1dCBhdCBsZWFzdCBmb3IKPiByYWRlb24sIGFtZGdw dSBhbmQgcHJldHR5IG11Y2ggVFRNIGluIGdlbmVyYWwgaXQgaXMgZXhhY3RseSB3aGF0IEkKPiBu ZWVkLgo+IAo+IEkgY291bGQgZml4IFRUTSB0byBub3QgbmVlZCB0aGF0LCBidXQgZm9yIHJhZGVv biBhbmQgYW1kZ3B1IGl0IGlzIHRoZQo+IGhhcmR3YXJlIHdoaWNoIG5lZWRzIHRoaXMuCgpJIGNh biBpbXBsZW1lbnQgaTkxNSBhcHByb2FjaCBhcyBSb2JpbiBzdWdnZXN0ZWQgYXMgYW4gYWx0ZXJu YXRpdmUuIElzIAp0aGF0IGJldHRlcj8KCgo+IAo+IENocmlzdGlhbi4KPiAKPj4gCj4+PiBUaGF0 IGlzIGEgaHVnZSB3YXN0ZSBvZiBtZW1vcnkgYW5kIENQVSBjeWNsZXMgYW5kIEkgYWN0dWFsbHkg d2FudGVkIAo+Pj4gdG8KPj4+IGdldCByaWQgb2YgaXQgZm9yIHF1aXRlIHNvbWUgdGltZSBub3cu IFNpbmFzIGFwcHJvYWNoIHNlZW1zIHRvIGJlIGEgCj4+PiBnb29kCj4+PiBzdGVwIGludG8gdGhl IHJpZ2h0IGRpcmVjdGlvbiB0byBtZSB0byBhY3R1YWxseSBjbGVhbiB0aGF0IHVwLgo+Pj4gCj4+ Pj4gRGV0ZWN0aW5nIHN1Y2ggYSBjb25kaXRpb24gaXMgbXVjaCBlYXNpZXIgaWYgdGhlIERNQSBt YXAgCj4+Pj4gaW1wbGVtZW50YXRpb24KPj4+PiBnaXZlcyB5b3UgdGhlIGNvYWxlc2NlZCBzY2F0 dGVyIGVudHJpZXMuCj4+PiBBIHdheSB3aGljaCBwcmVzZXJ2ZXMgYm90aCBwYXRoIHdvdWxkIGJl IGluZGVlZCBuaWNlIHRvIGhhdmUsIGJ1dCAKPj4+IHRoYXQKPj4+IG9ubHkgYWxsb3dzIGZvciB0 aGUgVExCIG9wdGltaXphdGlvbiBmb3IgdGhlIEdQVSBhbmQgbm90IHRoZSBDUFUgYW55Cj4+PiBt b3JlLiBTbyBJIGFjdHVhbGx5IHNlZSB0aGF0IGFzIHJlYWxseSBtaW5vciB1c2UgY2FzZS4KPj4g U29tZSBvZiB0aGUgVGVncmFzIGhhdmUgbXVjaCBsYXJnZXIgVExCcyBhbmQgYmV0dGVyIHBhZ2Ut d2Fsawo+PiBwZXJmb3JtYW5jZSBvbiB0aGUgc3lzdGVtIElPTU1VIGNvbXBhcmVkIHRvIHRoZSBH UFUgTU1VLCBzbyB0aGV5IHdvdWxkCj4+IHByb2JhYmx5IGJlbmVmaXQgYSBnb29kIGRlYWwgZXZl biBpZiB0aGUgaHVnZXBhZ2Ugb3B0aW1pemF0aW9uIG9ubHkKPj4gdGFyZ2V0cyB0aGUgR1BVIHNp ZGUuCj4+IAo+PiBSZWdhcmRzLAo+PiBMdWNhcwpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwphbWQtZ2Z4IG1haWxpbmcgbGlzdAphbWQtZ2Z4QGxpc3RzLmZy ZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2FtZC1nZngK