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: [v3,4/5] dmaengine: xilinx_dma: autodetect whether the HW supports scatter-gather From: Vinod Koul Message-Id: <20180629073707.GZ22377@vkoul-mobl> Date: Fri, 29 Jun 2018 13:07:07 +0530 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, Rob Herring , Mark Rutland , devicetree@vger.kernel.org, Radhey Shyam Pandey List-ID: T24gMjUtMDYtMTgsIDExOjI3LCBBbmRyZWEgTWVyZWxsbyB3cm90ZToKPiBUaGUgQVhJRE1BIGFu ZCBDRE1BIEhXIGNhbiBiZSBlaXRoZXIgZGlyZWN0LWFjY2VzcyBvciBzY2F0dGVyLWdhdGhlcgo+ IHZlcnNpb24uIFRoZXNlIGFyZSBTVyBpbmNvbXBhdGlibGUuCj4gCj4gVGhlIGRyaXZlciBjYW4g aGFuZGxlIGJvdGggdmVyc2lvbjogYSBEVCBwcm9wZXJ0eSB3YXMgdXNlZCB0bwogICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgIF5eXl4KdmVyc2lvbnMKCj4gdGVsbCB0aGUgZHJpdmVyIHdo ZXRoZXIgdG8gYXNzdW1lIHRoZSBIVyBpcyBpcyBzY2F0dGVyLWdhdGhlciBtb2RlLgogICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgXl5eXl4KaXMgaW4/Cgo+IAo+IFRo aXMgcGF0Y2ggbWFrZXMgdGhlIGRyaXZlciB0byBhdXRvZGV0ZWN0IHRoaXMgaW5mb3JtYXRpb24u IFRoZSBEVAo+IHByb3BlcnR5IGlzIG5vdCByZXF1aXJlZCBhbnltb3JlLgo+IAo+IE5vIGNoYW5n ZXMgZm9yIFZETUEuCj4gCj4gQ2M6IFJvYiBIZXJyaW5nIDxyb2JoK2R0QGtlcm5lbC5vcmc+Cj4g Q2M6IE1hcmsgUnV0bGFuZCA8bWFyay5ydXRsYW5kQGFybS5jb20+Cj4gQ2M6IGRldmljZXRyZWVA dmdlci5rZXJuZWwub3JnCj4gQ2M6IFJhZGhleSBTaHlhbSBQYW5kZXkgPHJhZGhleS5zaHlhbS5w YW5kZXlAeGlsaW54LmNvbT4KPiBTaWduZWQtb2ZmLWJ5OiBBbmRyZWEgTWVyZWxsbyA8YW5kcmVh Lm1lcmVsbG9AZ21haWwuY29tPgo+IFJldmlld2VkLWJ5OiBSYWRoZXkgU2h5YW0gUGFuZGV5IDxy YWRoZXkuc2h5YW0ucGFuZGV5QHhpbGlueC5jb20+Cj4gLS0tCj4gQ2hhbmdlcyBpbiB2MjoKPiAJ LSBhdXRvZGV0ZWN0IG9ubHkgaW4gIVZETUEgY2FzZQo+IENoYW5nZXMgaW4gdjM6Cj4gCS0gY2Mg RFQgbWFpbnRhaW5lcnMvTUwKPiAtLS0KPiAgZHJpdmVycy9kbWEveGlsaW54L3hpbGlueF9kbWEu YyB8IDE0ICsrKysrKysrKystLS0tCj4gIDEgZmlsZSBjaGFuZ2VkLCAxMCBpbnNlcnRpb25zKCsp LCA0IGRlbGV0aW9ucygtKQo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2RtYS94aWxpbngveGls aW54X2RtYS5jIGIvZHJpdmVycy9kbWEveGlsaW54L3hpbGlueF9kbWEuYwo+IGluZGV4IDdmMGFi OTA0Yjc0OS4uNDNmY2M3MWZmMjg3IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZG1hL3hpbGlueC94 aWxpbnhfZG1hLmMKPiArKysgYi9kcml2ZXJzL2RtYS94aWxpbngveGlsaW54X2RtYS5jCj4gQEAg LTg2LDYgKzg2LDcgQEAKPiAgI2RlZmluZSBYSUxJTlhfRE1BX0RNQVNSX0RNQV9ERUNfRVJSCQlC SVQoNikKPiAgI2RlZmluZSBYSUxJTlhfRE1BX0RNQVNSX0RNQV9TTEFWRV9FUlIJCUJJVCg1KQo+ ICAjZGVmaW5lIFhJTElOWF9ETUFfRE1BU1JfRE1BX0lOVF9FUlIJCUJJVCg0KQo+ICsjZGVmaW5l IFhJTElOWF9ETUFfRE1BU1JfU0dfTUFTSwkJQklUKDMpCj4gICNkZWZpbmUgWElMSU5YX0RNQV9E TUFTUl9JRExFCQkJQklUKDEpCj4gICNkZWZpbmUgWElMSU5YX0RNQV9ETUFTUl9IQUxURUQJCUJJ VCgwKQo+ICAjZGVmaW5lIFhJTElOWF9ETUFfRE1BU1JfREVMQVlfTUFTSwkJR0VOTUFTSygzMSwg MjQpCj4gQEAgLTQwNiw3ICs0MDcsNiBAQCBzdHJ1Y3QgeGlsaW54X2RtYV9jb25maWcgewo+ICAg KiBAZGV2OiBEZXZpY2UgU3RydWN0dXJlCj4gICAqIEBjb21tb246IERNQSBkZXZpY2Ugc3RydWN0 dXJlCj4gICAqIEBjaGFuOiBEcml2ZXIgc3BlY2lmaWMgRE1BIGNoYW5uZWwKPiAtICogQGhhc19z ZzogU3BlY2lmaWVzIHdoZXRoZXIgU2NhdHRlci1HYXRoZXIgaXMgcHJlc2VudCBvciBub3QKPiAg ICogQG1jZG1hOiBTcGVjaWZpZXMgd2hldGhlciBNdWx0aS1DaGFubmVsIGlzIHByZXNlbnQgb3Ig bm90Cj4gICAqIEBmbHVzaF9vbl9mc3luYzogRmx1c2ggb24gZnJhbWUgc3luYwo+ICAgKiBAZXh0 X2FkZHI6IEluZGljYXRlcyA2NCBiaXQgYWRkcmVzc2luZyBpcyBzdXBwb3J0ZWQgYnkgZG1hIGRl dmljZQo+IEBAIC00MjYsNyArNDI2LDYgQEAgc3RydWN0IHhpbGlueF9kbWFfZGV2aWNlIHsKPiAg CXN0cnVjdCBkZXZpY2UgKmRldjsKPiAgCXN0cnVjdCBkbWFfZGV2aWNlIGNvbW1vbjsKPiAgCXN0 cnVjdCB4aWxpbnhfZG1hX2NoYW4gKmNoYW5bWElMSU5YX0RNQV9NQVhfQ0hBTlNfUEVSX0RFVklD RV07Cj4gLQlib29sIGhhc19zZzsKPiAgCWJvb2wgbWNkbWE7Cj4gIAl1MzIgZmx1c2hfb25fZnN5 bmM7Cj4gIAlib29sIGV4dF9hZGRyOwo+IEBAIC0yMzkzLDcgKzIzOTIsNiBAQCBzdGF0aWMgaW50 IHhpbGlueF9kbWFfY2hhbl9wcm9iZShzdHJ1Y3QgeGlsaW54X2RtYV9kZXZpY2UgKnhkZXYsCj4g IAo+ICAJY2hhbi0+ZGV2ID0geGRldi0+ZGV2Owo+ICAJY2hhbi0+eGRldiA9IHhkZXY7Cj4gLQlj aGFuLT5oYXNfc2cgPSB4ZGV2LT5oYXNfc2c7Cj4gIAljaGFuLT5kZXNjX3BlbmRpbmdjb3VudCA9 IDB4MDsKPiAgCWNoYW4tPmV4dF9hZGRyID0geGRldi0+ZXh0X2FkZHI7Cj4gIAkvKiBUaGlzIHZh cmlhYmxlIGVuc3VyZXMgdGhhdCBkZXNjcmlwdG9ycyBhcmUgbm90Cj4gQEAgLTI0ODYsNiArMjQ4 NCwxNSBAQCBzdGF0aWMgaW50IHhpbGlueF9kbWFfY2hhbl9wcm9iZShzdHJ1Y3QgeGlsaW54X2Rt YV9kZXZpY2UgKnhkZXYsCj4gIAkJY2hhbi0+c3RvcF90cmFuc2ZlciA9IHhpbGlueF9kbWFfc3Rv cF90cmFuc2ZlcjsKPiAgCX0KPiAgCj4gKwkvKiBjaGVjayBpZiBTRyBpcyBlbmFibGVkIChvbmx5 IGZvciBBWElETUEgYW5kIENETUEpICovCj4gKwlpZiAoeGRldi0+ZG1hX2NvbmZpZy0+ZG1hdHlw ZSAhPSBYRE1BX1RZUEVfVkRNQSkgewo+ICsJCWlmIChkbWFfY3RybF9yZWFkKGNoYW4sIFhJTElO WF9ETUFfUkVHX0RNQVNSKSAmCj4gKwkJICAgIFhJTElOWF9ETUFfRE1BU1JfU0dfTUFTSykKCndo eSBub3QgcmVhZCB0aGlzIGZvciBWRE1BIHRvbywgd2lsbCBpdCByZXR1cm4gZmFsc2U/Cgo+ICsJ CQljaGFuLT5oYXNfc2cgPSB0cnVlOwo+ICsJCWRldl9kYmcoY2hhbi0+ZGV2LCAiY2ggJWQ6IFNH ICVzXG4iLCBjaGFuLT5pZCwKPiArCQkJY2hhbi0+aGFzX3NnID8gImVuYWJsZWQiIDogImRpc2Fi bGVkIik7Cgp0aGlzIGRlYnVnIHByaW50IGNhbiBiZSByZW1vdmVkCg==