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: [v5,2/7] dmaengine: xilinx_dma: in axidma slave_sg and dma_cyclic mode align split descriptors From: Vinod Koul Message-Id: <20180918162105.GC2613@vkoul-mobl> Date: Tue, 18 Sep 2018 09:21:05 -0700 To: Andrea Merello Cc: dan.j.williams@intel.com, michal.simek@xilinx.com, appana.durga.rao@xilinx.com, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, radhey.shyam.pandey@xilinx.com List-ID: T24gMDctMDktMTgsIDA4OjI0LCBBbmRyZWEgTWVyZWxsbyB3cm90ZToKPiBXaGVuZXZlciBhIHNp bmdsZSBvciBjeWNsaWMgdHJhbnNhY3Rpb24gaXMgcHJlcGFyZWQsIHRoZSBkcml2ZXIKPiBjb3Vs ZCBldmVudHVhbGx5IHNwbGl0IGl0IG92ZXIgc2V2ZXJhbCBTRyBkZXNjcmlwdG9ycyBpbiBvcmRl cgo+IHRvIGRlYWwgd2l0aCB0aGUgSFcgbWF4aW11bSB0cmFuc2ZlciBsZW5ndGguCj4gCj4gVGhp cyBjb3VsZCBlbmQgdXAgaW4gRE1BIG9wZXJhdGlvbnMgc3RhcnRpbmcgZnJvbSBhIG1pc2FsaWdu ZWQKPiBhZGRyZXNzLiBUaGlzIHNlZW1zIGZhdGFsIGZvciB0aGUgSFcgaWYgRFJFIChEYXRhIFJl YWxpZ25tZW50IEVuZ2luZSkKPiBpcyBub3QgZW5hYmxlZC4KPiAKPiBUaGlzIHBhdGNoIGV2ZW50 dWFsbHkgYWRqdXN0cyB0aGUgdHJhbnNmZXIgc2l6ZSBpbiBvcmRlciB0byBtYWtlIHN1cmUKPiBh bGwgb3BlcmF0aW9ucyBzdGFydCBmcm9tIGFuIGFsaWduZWQgYWRkcmVzcy4KPiAKPiBDYzogUmFk aGV5IFNoeWFtIFBhbmRleSA8cmFkaGV5LnNoeWFtLnBhbmRleUB4aWxpbnguY29tPgo+IFNpZ25l ZC1vZmYtYnk6IEFuZHJlYSBNZXJlbGxvIDxhbmRyZWEubWVyZWxsb0BnbWFpbC5jb20+Cj4gUmV2 aWV3ZWQtYnk6IFJhZGhleSBTaHlhbSBQYW5kZXkgPHJhZGhleS5zaHlhbS5wYW5kZXlAeGlsaW54 LmNvbT4KPiAtLS0KPiBDaGFuZ2VzIGluIHYyOgo+ICAgICAgICAgLSBkb24ndCBpbnRyb2R1Y2Ug Y29weV9tYXNrIGZpZWxkLCByYXRoZXIgcmVseSBvbiBhbHJlYWR5LWVzaXN0ZW50Cj4gICAgICAg ICAgIGNvcHlfYWxpZ24gZmllbGQuIFN1Z2dlc3RlZCBieSBSYWRoZXkgU2h5YW0gUGFuZGV5Cj4g ICAgICAgICAtIHJld29yZCB0aXRsZQo+IENoYW5nZXMgaW4gdjM6Cj4gCS0gZml4IGJ1ZyBpbnRy b2R1Y2VkIGluIHYyOiB3cm9uZyBjb3B5IHNpemUgd2hlbiBEUkUgaXMgZW5hYmxlZAo+IAktIHVz ZSBpbXBsZW1lbnRhdGlvbiBzdWdnZXN0ZWQgYnkgUmFkaGV5IFNoeWFtIFBhbmRleQo+IENoYW5n ZXMgaW4gdjQ6Cj4gCS0gcmV3b3JrIG9uIHRoZSB0b3Agb2YgMS82Cj4gQ2hhbmdlcyBpbiB2NToK PiAJLSBmaXggdHlwbyBpbiBjb21taXQgdGl0bGUKPiAJLSBhZGQgaGludCBhYm91dCAiRFJFIiBt ZWFuaW5nIGluIGNvbW1pdCBtZXNzYWdlCj4gLS0tCj4gIGRyaXZlcnMvZG1hL3hpbGlueC94aWxp bnhfZG1hLmMgfCAyMiArKysrKysrKysrKysrKysrKystLS0tCj4gIDEgZmlsZSBjaGFuZ2VkLCAx OCBpbnNlcnRpb25zKCspLCA0IGRlbGV0aW9ucygtKQo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJz L2RtYS94aWxpbngveGlsaW54X2RtYS5jIGIvZHJpdmVycy9kbWEveGlsaW54L3hpbGlueF9kbWEu Ywo+IGluZGV4IGEzYWFhMGUzNGNjNy4uYWFhNmRlOGE3MGU0IDEwMDY0NAo+IC0tLSBhL2RyaXZl cnMvZG1hL3hpbGlueC94aWxpbnhfZG1hLmMKPiArKysgYi9kcml2ZXJzL2RtYS94aWxpbngveGls aW54X2RtYS5jCj4gQEAgLTk1NCwxNSArOTU0LDI4IEBAIHN0YXRpYyBpbnQgeGlsaW54X2RtYV9h bGxvY19jaGFuX3Jlc291cmNlcyhzdHJ1Y3QgZG1hX2NoYW4gKmRjaGFuKQo+ICAKPiAgLyoqCj4g ICAqIHhpbGlueF9kbWFfY2FsY19jb3B5c2l6ZSAtIENhbGN1bGF0ZSB0aGUgYW1vdW50IG9mIGRh dGEgdG8gY29weQo+ICsgKiBAY2hhbjogRHJpdmVyIHNwZWNpZmljIERNQSBjaGFubmVsCj4gICAq IEBzaXplOiBUb3RhbCBkYXRhIHRoYXQgbmVlZHMgdG8gYmUgY29waWVkCj4gICAqIEBkb25lOiBB bW91bnQgb2YgZGF0YSB0aGF0IGhhcyBiZWVuIGFscmVhZHkgY29waWVkCj4gICAqCj4gICAqIFJl dHVybjogQW1vdW50IG9mIGRhdGEgdGhhdCBoYXMgdG8gYmUgY29waWVkCj4gICAqLwo+IC1zdGF0 aWMgaW50IHhpbGlueF9kbWFfY2FsY19jb3B5c2l6ZShpbnQgc2l6ZSwgaW50IGRvbmUpCj4gK3N0 YXRpYyBpbnQgeGlsaW54X2RtYV9jYWxjX2NvcHlzaXplKHN0cnVjdCB4aWxpbnhfZG1hX2NoYW4g KmNoYW4sCj4gKwkJCQkgICAgaW50IHNpemUsIGludCBkb25lKQoKYWxpZ24gdG8gcHJlY2VlZGlu ZyBsaW5lIG9wZW5pbmcgYnJhY2UgcGxlYXNlCgo+ICB7Cj4gLQlyZXR1cm4gbWluX3Qoc2l6ZV90 LCBzaXplIC0gZG9uZSwKPiArCXNpemVfdCBjb3B5ID0gbWluX3Qoc2l6ZV90LCBzaXplIC0gZG9u ZSwKPiAgCQkgICAgIFhJTElOWF9ETUFfTUFYX1RSQU5TX0xFTik7CgpzbyB3ZSBjYW4gZG8gdGhp cyB3YXkgaW4gcGF0Y2ggMToKCiAgICAgICAgc2l6ZSB0IGNvcHk7CgogICAgICAgIGNvcHkgPSAg bWluX3Qoc2l6ZV90LCBzaXplIC0gZG9uZSwKICAgICAgICAgICAgICAgICAgICAgIFhJTElOWF9E TUFfTUFYX1RSQU5TX0xFTik7CgogICAgICAgIHJldHVybiBjb3B5OwoKYW5kIHRoZW4gYWRkIHRo ZXNlIGhlcmUsIGZlZWxzIGxpa2Ugd2UgYXJlIHJlZG9pbmcgY2hhbmdlIGludHJvZHVjZWQgaW4K cGF0Y2ggMS4uCgoKPiArCWlmICgoY29weSArIGRvbmUgPCBzaXplKSAmJgo+ICsJICAgIGNoYW4t PnhkZXYtPmNvbW1vbi5jb3B5X2FsaWduKSB7Cj4gKwkJLyoKPiArCQkgKiBJZiB0aGlzIGlzIG5v dCB0aGUgbGFzdCBkZXNjcmlwdG9yLCBtYWtlIHN1cmUKPiArCQkgKiB0aGUgbmV4dCBvbmUgd2ls bCBiZSBwcm9wZXJseSBhbGlnbmVkCj4gKwkJICovCj4gKwkJY29weSA9IHJvdW5kZG93bihjb3B5 LAo+ICsJCQkJICgxIDw8IGNoYW4tPnhkZXYtPmNvbW1vbi5jb3B5X2FsaWduKSk7Cj4gKwl9Cj4g KwlyZXR1cm4gY29weTsKPiAgfQo+ICAKPiAgLyoqCj4gQEAgLTE4MDQsNyArMTgxNyw3IEBAIHN0 YXRpYyBzdHJ1Y3QgZG1hX2FzeW5jX3R4X2Rlc2NyaXB0b3IgKnhpbGlueF9kbWFfcHJlcF9zbGF2 ZV9zZygKPiAgCQkJICogQ2FsY3VsYXRlIHRoZSBtYXhpbXVtIG51bWJlciBvZiBieXRlcyB0byB0 cmFuc2ZlciwKPiAgCQkJICogbWFraW5nIHN1cmUgaXQgaXMgbGVzcyB0aGFuIHRoZSBodyBsaW1p dAo+ICAJCQkgKi8KPiAtCQkJY29weSA9IHhpbGlueF9kbWFfY2FsY19jb3B5c2l6ZShzZ19kbWFf bGVuKHNnKSwKPiArCQkJY29weSA9IHhpbGlueF9kbWFfY2FsY19jb3B5c2l6ZShjaGFuLCBzZ19k bWFfbGVuKHNnKSwKCndoeSBub3Qga2VlcCBjaGFuIGluIHBhdGNoIDEgYW5kIGFkZCBvbmx5IGhh bmRsaW5nIGluIHBhdGNoIDIsIHNlZW1zCmxlc3MgY2h1cm4gdG8gbWUuLgo=