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: [v4,1/7] dmaengine: xilinx_dma: commonize DMA copy size calculation From: Andrea Merello Message-Id: <20180802141012.19970-1-andrea.merello@gmail.com> Date: Thu, 2 Aug 2018 16:10:06 +0200 To: vkoul@kernel.org, dan.j.williams@intel.com, michal.simek@xilinx.com, appana.durga.rao@xilinx.com, dmaengine@vger.kernel.org Cc: v4-000linux-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 cwotLS0KIGRyaXZlcnMvZG1hL3hpbGlueC94aWxpbnhfZG1hLmMgfCAyMCArKysrKysrKysrKysr KysrLS0tLQogMSBmaWxlIGNoYW5nZWQsIDE2IGluc2VydGlvbnMoKyksIDQgZGVsZXRpb25zKC0p CgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9kbWEveGlsaW54L3hpbGlueF9kbWEuYyBiL2RyaXZlcnMv ZG1hL3hpbGlueC94aWxpbnhfZG1hLmMKaW5kZXggMjdiNTIzNTMwYzRhLi5hM2FhYTBlMzRjYzcg MTAwNjQ0Ci0tLSBhL2RyaXZlcnMvZG1hL3hpbGlueC94aWxpbnhfZG1hLmMKKysrIGIvZHJpdmVy cy9kbWEveGlsaW54L3hpbGlueF9kbWEuYwpAQCAtOTUyLDYgKzk1MiwxOSBAQCBzdGF0aWMgaW50 IHhpbGlueF9kbWFfYWxsb2NfY2hhbl9yZXNvdXJjZXMoc3RydWN0IGRtYV9jaGFuICpkY2hhbikK IAlyZXR1cm4gMDsKIH0KIAorLyoqCisgKiB4aWxpbnhfZG1hX2NhbGNfY29weXNpemUgLSBDYWxj dWxhdGUgdGhlIGFtb3VudCBvZiBkYXRhIHRvIGNvcHkKKyAqIEBzaXplOiBUb3RhbCBkYXRhIHRo YXQgbmVlZHMgdG8gYmUgY29waWVkCisgKiBAZG9uZTogQW1vdW50IG9mIGRhdGEgdGhhdCBoYXMg YmVlbiBhbHJlYWR5IGNvcGllZAorICoKKyAqIFJldHVybjogQW1vdW50IG9mIGRhdGEgdGhhdCBo YXMgdG8gYmUgY29waWVkCisgKi8KK3N0YXRpYyBpbnQgeGlsaW54X2RtYV9jYWxjX2NvcHlzaXpl KGludCBzaXplLCBpbnQgZG9uZSkKK3sKKwlyZXR1cm4gbWluX3Qoc2l6ZV90LCBzaXplIC0gZG9u ZSwKKwkJICAgICBYSUxJTlhfRE1BX01BWF9UUkFOU19MRU4pOworfQorCiAvKioKICAqIHhpbGlu eF9kbWFfdHhfc3RhdHVzIC0gR2V0IERNQSB0cmFuc2FjdGlvbiBzdGF0dXMKICAqIEBkY2hhbjog RE1BIGNoYW5uZWwKQEAgLTE3OTEsOCArMTgwNCw4IEBAIHN0YXRpYyBzdHJ1Y3QgZG1hX2FzeW5j X3R4X2Rlc2NyaXB0b3IgKnhpbGlueF9kbWFfcHJlcF9zbGF2ZV9zZygKIAkJCSAqIENhbGN1bGF0 ZSB0aGUgbWF4aW11bSBudW1iZXIgb2YgYnl0ZXMgdG8gdHJhbnNmZXIsCiAJCQkgKiBtYWtpbmcg c3VyZSBpdCBpcyBsZXNzIHRoYW4gdGhlIGh3IGxpbWl0CiAJCQkgKi8KLQkJCWNvcHkgPSBtaW5f dChzaXplX3QsIHNnX2RtYV9sZW4oc2cpIC0gc2dfdXNlZCwKLQkJCQkgICAgIFhJTElOWF9ETUFf TUFYX1RSQU5TX0xFTik7CisJCQljb3B5ID0geGlsaW54X2RtYV9jYWxjX2NvcHlzaXplKHNnX2Rt YV9sZW4oc2cpLAorCQkJCQkJCXNnX3VzZWQpOwogCQkJaHcgPSAmc2VnbWVudC0+aHc7CiAKIAkJ CS8qIEZpbGwgaW4gdGhlIGRlc2NyaXB0b3IgKi8KQEAgLTE4OTYsOCArMTkwOSw3IEBAIHN0YXRp YyBzdHJ1Y3QgZG1hX2FzeW5jX3R4X2Rlc2NyaXB0b3IgKnhpbGlueF9kbWFfcHJlcF9kbWFfY3lj bGljKAogCQkJICogQ2FsY3VsYXRlIHRoZSBtYXhpbXVtIG51bWJlciBvZiBieXRlcyB0byB0cmFu c2ZlciwKIAkJCSAqIG1ha2luZyBzdXJlIGl0IGlzIGxlc3MgdGhhbiB0aGUgaHcgbGltaXQKIAkJ CSAqLwotCQkJY29weSA9IG1pbl90KHNpemVfdCwgcGVyaW9kX2xlbiAtIHNnX3VzZWQsCi0JCQkJ ICAgICBYSUxJTlhfRE1BX01BWF9UUkFOU19MRU4pOworCQkJY29weSA9IHhpbGlueF9kbWFfY2Fs Y19jb3B5c2l6ZShwZXJpb2RfbGVuLCBzZ191c2VkKTsKIAkJCWh3ID0gJnNlZ21lbnQtPmh3Owog CQkJeGlsaW54X2F4aWRtYV9idWYoY2hhbiwgaHcsIGJ1Zl9hZGRyLCBzZ191c2VkLAogCQkJCQkg IHBlcmlvZF9sZW4gKiBpKTsK