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 metadata_ops for dma_async_tx_descriptor From: Peter Ujfalusi Message-Id: <38aa48ba-5cf9-da12-bef8-b75e22f8b822@ti.com> Date: Fri, 17 Aug 2018 09:30:30 +0300 To: Radhey Shyam Pandey , "dan.j.williams@intel.com" , "vkoul@kernel.org" Cc: "dmaengine@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "lars@metafoo.de" List-ID: UmFkaGV5LAoKT24gMjAxOC0wOC0xNiAxNjoyOSwgUmFkaGV5IFNoeWFtIFBhbmRleSB3cm90ZToK Pj4gKy8qKgo+PiArICogZW51bSBkbWFfZGVzY19tZXRhZGF0YV9tb2RlIC0gcGVyIGRlc2NyaXB0 b3IgbWV0YWRhdGEgbW9kZSB0eXBlcwo+PiBzdXBwb3J0ZWQKPj4gKyAqIEBERVNDX01FVEFEQVRB X0NMSUVOVCAtIHRoZSBtZXRhZGF0YSBidWZmZXIgaXMgYWxsb2NhdGVkL3Byb3ZpZGVkIGJ5Cj4+ IHRoZQo+PiArICogIGNsaWVudCBkcml2ZXIgYW5kIGl0IGlzIGF0dGFjaGVkICh2aWEgdGhlIGRt YWVuZ2luZV9kZXNjX2F0dGFjaF9tZXRhZGF0YSgpCj4+ICsgKiAgaGVscGVyKSB0byB0aGUgZGVz Y3JpcHRvci4KPj4gKyAqIEBERVNDX01FVEFEQVRBX0VNQkVEREVEIC0gdGhlIG1ldGFkYXRhIGJ1 ZmZlciBpcwo+PiBhbGxvY2F0ZWQvbWFuYWdlZCBieSB0aGUgRE1BCj4gSnVzdCBhIHRob3VnaHQg LSBXZSBjYW4gcmVuYW1lIGl0IHRvIERFU0NfTUVUQURBVEFfRU5HSU5FPyAKPiBpLmUgbWV0YWRh dGEgYWxsb2NhdGlvbiBwbGFjZSAtID4gIGRtYSBjbGllbnQvZW5naW5lLgoKU291bmRzIGdvb2Qu Cgo+IAo+PiArICogIGRyaXZlci4gVGhlIGNsaWVudCBkcml2ZXIgY2FuIGFzayBmb3IgdGhlIHBv aW50ZXIsIG1heGltdW0gc2l6ZSBhbmQgdGhlCj4+ICsgKiAgY3VycmVudGx5IHVzZWQgc2l6ZSBv ZiB0aGUgbWV0YWRhdGEgYW5kIGNhbiBkaXJlY3RseSB1cGRhdGEgb3IgcmVhZCBpdC4KPiAvcy91 cGRhdGEvdXBkYXRlCj4gCj4+ICsgKiAgZG1hZW5naW5lX2Rlc2NfZ2V0X21ldGFkYXRhX3B0cigp IGFuZAo+PiBkbWFlbmdpbmVfZGVzY19zZXRfbWV0YWRhdGFfbGVuKCkgaXMKPj4gKyAqICBwcm92 aWRlZCBhcyBoZWxwZXIgZnVuY3Rpb25zLgo+IEl0IHdpbGwgYmUgaGVscGZ1bCBpZiB3ZSBhZGQg ZGVzY3JpcHRpb24gZm9yIGJvdGggREVTQ19NRVRBREFUQV9FTUJFRERFRCAKPiBtb2RlcyBpLmUg RE1BX0RFVl9UT19NRU0gYW5kIE1FTV9UT19ERVYgdHlwZXMuIEkgdGhpbmsgaW4gREVWX1RPX01F TQo+IHdlIGRvbid0IG5lZWQgdG8gc2V0X21ldGFkYXRhX2xlbigpLiBMZW5ndGggd2lsbCBwcm92 aWRlZCBieSBETUEgZW5naW5lLgoKSSBhZ3JlZSwgaXQgaXMgYmV0dGVyIHRvIGV4dGVuZCB0aGUg ZXhwbGFuYXRpb24gb24gdGhlIHR3byBtb2Rlcy4KCi4uLgoKPj4gK3N0YXRpYyBpbmxpbmUgaW50 IF9kZXNjX2NoZWNrX2FuZF9zZXRfbWV0YWRhdGFfbW9kZSgKPj4gKwlzdHJ1Y3QgZG1hX2FzeW5j X3R4X2Rlc2NyaXB0b3IgKmRlc2MsIGVudW0KPj4gZG1hX2Rlc2NfbWV0YWRhdGFfbW9kZSBtb2Rl KQo+PiArewo+PiArCS8qIE1ha2Ugc3VyZSB0aGF0IHRoZSBtZXRhZGF0YSBtb2RlIGlzIG5vdCBt aXhlZCAqLwo+PiArCWlmICghZGVzYy0+ZGVzY19tZXRhZGF0YV9tb2RlKSB7Cj4gTWlub3Igbml0 IC0gd2UgY2FuIHJlZmFjdG9yIHRoaXMgY29kZSB0byBoYXZlIGZhaWx1cmUgcGF0aCBlYXJseS4K CkkgZG9uJ3QgdGhpbmsgaXQgd291bGQgaGVscCByZWFkYWJpbGl0eSwgdG8gbW92ZSB0aGUgZmFp bHVyZSBjYXNlIGZpcnN0OgoKaWYgKGRlc2MtPmRlc2NfbWV0YWRhdGFfbW9kZSAmJgogICAgKGRl c2MtPmRlc2NfbWV0YWRhdGFfbW9kZSAhPSBtb2RlKSkgewoJcmV0dXJuIC1FSU5WQUw7Cn0gZWxz ZSBpZiAoIWRlc2MtPmRlc2NfbWV0YWRhdGFfbW9kZSkgewoJaWYgKGRtYWVuZ2luZV9pc19tZXRh ZGF0YV9tb2RlX3N1cHBvcnRlZChkZXNjLT5jaGFuLCBtb2RlKSkKCQkJZGVzYy0+ZGVzY19tZXRh ZGF0YV9tb2RlID0gbW9kZTsKCQllbHNlCgkJCXJldHVybiAtRU5PVFNVUFA7Cn0KCnJldHVybiAw OwoKPiAKPj4gKwkJaWYgKGRtYWVuZ2luZV9pc19tZXRhZGF0YV9tb2RlX3N1cHBvcnRlZChkZXNj LT5jaGFuLAo+PiBtb2RlKSkKPj4gKwkJCWRlc2MtPmRlc2NfbWV0YWRhdGFfbW9kZSA9IG1vZGU7 Cj4+ICsJCWVsc2UKPj4gKwkJCXJldHVybiAtRU5PVFNVUFA7Cj4+ICsJfSBlbHNlIGlmIChkZXNj LT5kZXNjX21ldGFkYXRhX21vZGUgIT0gbW9kZSkgewo+PiArCQlyZXR1cm4gLUVJTlZBTDsKPj4g Kwl9Cj4+ICsKPj4gKwlyZXR1cm4gMDsKPj4gK30KCi0gUMOpdGVyCgpUZXhhcyBJbnN0cnVtZW50 cyBGaW5sYW5kIE95LCBQb3Jra2FsYW5rYXR1IDIyLCAwMDE4MCBIZWxzaW5raS4KWS10dW5udXMv QnVzaW5lc3MgSUQ6IDA2MTU1MjEtNC4gS290aXBhaWtrYS9Eb21pY2lsZTogSGVsc2lua2kK