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: [v5,1/7] dmaengine: xilinx_dma: commonize DMA copy size calculation From: Andrea Merello Message-Id: <20180907062502.8241-1-andrea.merello@gmail.com> Date: Fri, 7 Sep 2018 08:24:56 +0200 To: vkoul@kernel.org, dan.j.williams@intel.com, michal.simek@xilinx.com, appana.durga.rao@xilinx.com, dmaengine@vger.kernel.org Cc: 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, Andrea Merello List-ID: VGhpcyBwYXRjaCByZW1vdmVzIGEgYml0IG9mIGR1cGxpY2F0ZWQgY29kZSBieSBpbnRyb2R1Y2lu ZyBhIG5ldwpmdW5jdGlvbiB0aGF0IGltcGxlbWVudHMgY2FsY3VsYXRpb25zIGZvciBETUEgY29w eSBzaXplLgoKU3VnZ2VzdGVkLWJ5OiBWaW5vZCBLb3VsIDx2a291bEBrZXJuZWwub3JnPgpTaWdu ZWQtb2ZmLWJ5OiBBbmRyZWEgTWVyZWxsbyA8YW5kcmVhLm1lcmVsbG9AZ21haWwuY29tPgotLS0K Q2hhbmdlcyBpbiB2NDoKCS0gaW50cm9kdWNlIHRoaXMgcGF0Y2ggaW4gdGhlIHBhdGNoIHNlcmll cwpDaGFuZ2VzIGluIHY1OgoJTm9uZQotLS0KIGRyaXZlcnMvZG1hL3hpbGlueC94aWxpbnhfZG1h LmMgfCAyMCArKysrKysrKysrKysrKysrLS0tLQogMSBmaWxlIGNoYW5nZWQsIDE2IGluc2VydGlv bnMoKyksIDQgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9kbWEveGlsaW54L3hp bGlueF9kbWEuYyBiL2RyaXZlcnMvZG1hL3hpbGlueC94aWxpbnhfZG1hLmMKaW5kZXggMjdiNTIz NTMwYzRhLi5hM2FhYTBlMzRjYzcgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvZG1hL3hpbGlueC94aWxp bnhfZG1hLmMKKysrIGIvZHJpdmVycy9kbWEveGlsaW54L3hpbGlueF9kbWEuYwpAQCAtOTUyLDYg Kzk1MiwxOSBAQCBzdGF0aWMgaW50IHhpbGlueF9kbWFfYWxsb2NfY2hhbl9yZXNvdXJjZXMoc3Ry dWN0IGRtYV9jaGFuICpkY2hhbikKIAlyZXR1cm4gMDsKIH0KIAorLyoqCisgKiB4aWxpbnhfZG1h X2NhbGNfY29weXNpemUgLSBDYWxjdWxhdGUgdGhlIGFtb3VudCBvZiBkYXRhIHRvIGNvcHkKKyAq IEBzaXplOiBUb3RhbCBkYXRhIHRoYXQgbmVlZHMgdG8gYmUgY29waWVkCisgKiBAZG9uZTogQW1v dW50IG9mIGRhdGEgdGhhdCBoYXMgYmVlbiBhbHJlYWR5IGNvcGllZAorICoKKyAqIFJldHVybjog QW1vdW50IG9mIGRhdGEgdGhhdCBoYXMgdG8gYmUgY29waWVkCisgKi8KK3N0YXRpYyBpbnQgeGls aW54X2RtYV9jYWxjX2NvcHlzaXplKGludCBzaXplLCBpbnQgZG9uZSkKK3sKKwlyZXR1cm4gbWlu X3Qoc2l6ZV90LCBzaXplIC0gZG9uZSwKKwkJICAgICBYSUxJTlhfRE1BX01BWF9UUkFOU19MRU4p OworfQorCiAvKioKICAqIHhpbGlueF9kbWFfdHhfc3RhdHVzIC0gR2V0IERNQSB0cmFuc2FjdGlv biBzdGF0dXMKICAqIEBkY2hhbjogRE1BIGNoYW5uZWwKQEAgLTE3OTEsOCArMTgwNCw4IEBAIHN0 YXRpYyBzdHJ1Y3QgZG1hX2FzeW5jX3R4X2Rlc2NyaXB0b3IgKnhpbGlueF9kbWFfcHJlcF9zbGF2 ZV9zZygKIAkJCSAqIENhbGN1bGF0ZSB0aGUgbWF4aW11bSBudW1iZXIgb2YgYnl0ZXMgdG8gdHJh bnNmZXIsCiAJCQkgKiBtYWtpbmcgc3VyZSBpdCBpcyBsZXNzIHRoYW4gdGhlIGh3IGxpbWl0CiAJ CQkgKi8KLQkJCWNvcHkgPSBtaW5fdChzaXplX3QsIHNnX2RtYV9sZW4oc2cpIC0gc2dfdXNlZCwK LQkJCQkgICAgIFhJTElOWF9ETUFfTUFYX1RSQU5TX0xFTik7CisJCQljb3B5ID0geGlsaW54X2Rt YV9jYWxjX2NvcHlzaXplKHNnX2RtYV9sZW4oc2cpLAorCQkJCQkJCXNnX3VzZWQpOwogCQkJaHcg PSAmc2VnbWVudC0+aHc7CiAKIAkJCS8qIEZpbGwgaW4gdGhlIGRlc2NyaXB0b3IgKi8KQEAgLTE4 OTYsOCArMTkwOSw3IEBAIHN0YXRpYyBzdHJ1Y3QgZG1hX2FzeW5jX3R4X2Rlc2NyaXB0b3IgKnhp bGlueF9kbWFfcHJlcF9kbWFfY3ljbGljKAogCQkJICogQ2FsY3VsYXRlIHRoZSBtYXhpbXVtIG51 bWJlciBvZiBieXRlcyB0byB0cmFuc2ZlciwKIAkJCSAqIG1ha2luZyBzdXJlIGl0IGlzIGxlc3Mg dGhhbiB0aGUgaHcgbGltaXQKIAkJCSAqLwotCQkJY29weSA9IG1pbl90KHNpemVfdCwgcGVyaW9k X2xlbiAtIHNnX3VzZWQsCi0JCQkJICAgICBYSUxJTlhfRE1BX01BWF9UUkFOU19MRU4pOworCQkJ Y29weSA9IHhpbGlueF9kbWFfY2FsY19jb3B5c2l6ZShwZXJpb2RfbGVuLCBzZ191c2VkKTsKIAkJ CWh3ID0gJnNlZ21lbnQtPmh3OwogCQkJeGlsaW54X2F4aWRtYV9idWYoY2hhbiwgaHcsIGJ1Zl9h ZGRyLCBzZ191c2VkLAogCQkJCQkgIHBlcmlvZF9sZW4gKiBpKTsK