From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [RFC] dmaengine: Add metadat_ops for dma_async_tx_descriptor From: Vinod Koul Message-Id: <20180719092224.GK3219@vkoul-mobl> Date: Thu, 19 Jul 2018 14:52:24 +0530 To: Peter Ujfalusi Cc: radheys@xilinx.com, vinod.koul@intel.com, lars@metafoo.de, michal.simek@xilinx.com, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, dan.j.williams@intel.com, appanad@xilinx.com, linux-arm-kernel@lists.infradead.org List-ID: SGkgUGV0ZXIsCgpPbiAxOC0wNy0xOCwgMTM6MDYsIFBldGVyIFVqZmFsdXNpIHdyb3RlOgoKPiA+ PiArc3RydWN0IGRtYV9hc3luY190eF9kZXNjcmlwdG9yOwo+ID4+ICsKPiA+PiArc3RydWN0IGRt YV9kZXNjcmlwdG9yX21ldGFkYXRhX29wcyB7Cj4gPj4gKwlpbnQgKCphdHRhY2gpKHN0cnVjdCBk bWFfYXN5bmNfdHhfZGVzY3JpcHRvciAqZGVzYywgdm9pZCAqZGF0YSwKPiA+PiArCQkgICAgICBz aXplX3QgbGVuKTsKPiA+IAo+ID4gSG93IGRvZXMgb25lIGRldGFjaD8KPiAKPiBJIGhhdmUgbm90 IHRob3VnaHQgYWJvdXQgZGV0YWNoLCBidXQgY2xpZW50cyBjYW4ganVzdCBhdHRhY2ggTlVMTCBJ IGd1ZXNzLgoKU28gd2hhdCBhcmUgdGhlIGltcGxpY2F0aW9uIG9mIGF0dGFjaCBhbmQgZGV0YWNo IGhlcmUsIHNob3VsZCB0aGUgZGF0YQpiZSBkZXJlZiBieSBkbWFlbmdpbmUgZHJpdmVyIGFuZCBk cm9wIHRoZSByZWYuCgpTaG91bGQgYW55b25lIGRvIHJlZmNvdW50aW5nPwoKPiAKPiA+IFdoZW4g c2hvdWxkIHRoZSBjbGllbnQgZnJlZSB1cCB0aGUgbWVtb3J5LCBJT1cgd2hlbgo+ID4gZG9lcyBk bWEgZHJpdmVyIGRyb3AgcmVmIHRvIGRhdGEuCj4gCj4gVGhlIG1ldGFkYXRhIGlzIGZvciB0aGUg ZGVzY3JpcHRvciBzbyB0aGUgRE1BIGRyaXZlciBtaWdodCB3YW50IHRvCj4gYWNjZXNzIHRvIGl0 IHdoaWxlIHRoZSBkZXNjcmlwdG9yIGlzIHZhbGlkLgo+IAo+IFR5cGljYWxseSBjbGllbnRzIGNh biBmcmVlIHVwIHRoZWlyIG1ldGFkYXRhIHN0b3JhZ2UgYWZ0ZXIgdGhlIGRtYQo+IGNvbXBsZXRp b24gY2FsbGJhY2suIE9uIERFVl9UT19NRU0gdGhlIG1ldGFkYXRhIGlzIGdvaW5nIHRvIGJlIHBs YWNlZCBpbgo+IHRoZSBwcm92aWRlZCBidWZmZXIgd2hlbiB0aGUgdHJhbnNmZXIgaXMgY29tcGxl dGVkLgoKVGhhdCBzb3VuZHMgb2theSB0byBtZQoKPiA+PiArCXZvaWQgKigqZ2V0X3B0cikoc3Ry dWN0IGRtYV9hc3luY190eF9kZXNjcmlwdG9yICpkZXNjLAo+ID4+ICsJCQkgc2l6ZV90ICpwYXls b2FkX2xlbiwgc2l6ZV90ICptYXhfbGVuKTsKPiA+IAo+ID4gc28gd2hhdCBpcyB0aGlzIHN1cHBv c2VkIHRvIGRvLi4/Cj4gCj4gTXkgaXNzdWUgd2l0aCB0aGUgYXR0YWNoIGluIGdlbmVyYWwgaXMg dGhhdCBpdCB3aWxsIG5lZWQgYWRkaXRpb25hbAo+IG1lbWNweSB0byBtb3ZlIHRoZSBtZXRhZGF0 YSBmcm9tL3RvIHRoZSBjbGllbnQgYnVmZmVyIHRvIGl0J3MgcGxhY2UuCj4gCj4gV2l0aCBnZXRf cHRyIHRoZSBjbGllbnQgY2FuIGdldCB0aGUgcG9pbnRlciB0byB0aGUgYWN0dWFsIHBsYWNlIHdo ZXJlCj4gdGhlIG1ldGFkYXRhIHJlc2lkZXMgYW5kIG1vZGlmeS9yZWFkIGl0IGluIHBsYWNlIHcv byBtZW1jcHkuCj4gCj4gSSBrbm93LCBJIGtub3cuLi4gV2UgbmVlZCB0byB0cnVzdCB0aGUgY2xp ZW50cywgYnV0IHdpdGggaGlnaCB0aHJvdWdocHV0Cj4gcGVyaXBoZXJhbHMgdGhlIG1lbWNweSBp cyB0YXhpbmcuCgpPa2F5IEkgYW0gbm90IHN1cmUgSSBoYXZlIHVuZGVyc3Rvb2QgZnVsbHksIHNv IHdpdGggYXR0YWNoIHlvdSBzZXQKYSBwb2ludGVyIChjb250YWluaW5nIG1ldGRhdGE/KSBzbyB3 aHkgZG8geW91IG5lZWQgYWRkaXRpb25hbCBvbmUuLgoKPiAKPiA+IAo+ID4+ICsJaW50ICgqc2V0 X2xlbikoc3RydWN0IGRtYV9hc3luY190eF9kZXNjcmlwdG9yICpkZXNjLAo+ID4+ICsJCSAgICAg ICBzaXplX3QgcGF5bG9hZF9sZW4pOwo+ID4gCj4gPiBhdHRhY2ggYWxyZWFkeSBoYXMgbGVuZ3Ro LCBzbyBob3cgZG9lcyB0aGlzIGhlbHA/Cj4gCj4gU28sIERNQSBkcml2ZXJzIGNhbiBpbXBsZW1l bnQgZWl0aGVyIG9yIGJvdGg6Cj4gMS4gYXR0YWNoKCkKPiAyLiBnZXRfcHRyKCkgLyBzZXRfbGVu KCkKCkFoIG9rYXksIHdoYXQgYXJlIHRoZSByZWFzb25zIGZvciBwcm92aWRpbmcgdHdvIG1ldGhv ZHMgYW5kIG5vdCBhIHNpbmdsZQpvbmUKCj4gCj4gQ2xpZW50cyBtdXN0IG5vdCBtaXggdGhlIHR3 byB3YXkgb2YgaGFuZGxpbmcgdGhlIG1ldGFkYXRhLgo+IFRoZSBzZXRfbGVuKCkgaXMgaW50ZW5k ZWQgdG8gdGVsbCB0aGUgRE1BIGRyaXZlciB0aGUgY2xpZW50IHByb3ZpZGVkCj4gbWV0YWRhdGEg c2l6ZSAoaW4gTUVNX1RPX0RFViBjYXNlIG1vc3RseSkuCj4gCj4gTUVNX1RPX0RFViBmbG93IG9u IGNsaWVudCBzaWRlOgo+IGdldF9wdHIoKQo+IGZpbGwgaW4gdGhlIG1ldGFkYXRhIHRvIHRoZSBw b2ludGVyIChub3QgZXhjZWVkaW5nIG1heF9sZW4pCj4gc2V0X2xlbigpIHRvIHRlbGwgdGhlIERN QSBkcml2ZXIgdGhlIGFtb3VudCBvZiB2YWxpZCBieXRlcyB3cml0dGVuCj4gCj4gREVWX1RPX01F TSBmbG93IG9uIGNsaWVudCBzaWRlOgo+IEluIHRoZSBjb21wbGV0aW9uIGNhbGxiYWNrLCBnZXRf cHRyKCkKPiB0aGUgbWV0YWRhdGEgaXMgcGF5bG9hZF9sZW4gYnl0ZXMgYW5kIGNhbiBiZSBhY2Nl c3NlZCBpbiB0aGUgcmV0dXJuIHBvaW50ZXIuCgpJIHdvdWxkIHRoaW5rIHRvIHVuaWZ5IHRoaXMu LgoKPiBCVFc6IFRoZSBkcml2ZXIgd2hpY2ggaXMgZ29pbmcgdG8gbmVlZCB0aGlzIGlzIG5vdyBh Y2Nlc3NpYmxlIGluIHB1YmxpYzoKPiBodHRwczovL2dpdC50aS5jb20vdGktbGludXgta2VybmVs L3RpLWxpbnV4LWtlcm5lbC90cmVlcy90aS1saW51eC00LjE0LnkvZHJpdmVycy9kbWEvdGkKPiAK PiBvciBpbiBteSB3aXAgdHJlZToKPiBodHRwczovL2dpdGh1Yi5jb20vb21hcC1hdWRpby9saW51 eC1hdWRpby90cmVlL3BldGVyL3RpLWxpbnV4LTQuMTQueS93aXAvZHJpdmVycy9kbWEvdGkKPiAK PiBwcmVmaXhlZCB3aXRoIGszLSoKPgo=