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: [v3,3/3] dmaengine: imx-sdma: allocate max 20 bds for one transfer From: Lucas Stach Message-Id: <1533558590.2809.1.camel@pengutronix.de> Date: Mon, 06 Aug 2018 14:29:50 +0200 To: Robin Gong , "vkoul@kernel.org" , "dan.j.williams@intel.com" , "s.hauer@pengutronix.de" , "linux@armlinux.org.uk" Cc: "dmaengine@vger.kernel.org" , "linux-kernel@vger.kernel.org" , dl-linux-imx , "kernel@pengutronix.de" , "linux-arm-kernel@lists.infradead.org" List-ID: SGkgUm9iaW4sCgpBbSBNb250YWcsIGRlbiAwNi4wOC4yMDE4LCAwODowNCArMDAwMCBzY2hyaWVi IFJvYmluIEdvbmc6Cj4gSGVsbG8gTHVjYXMsCj4gCUFueSBjb21tZW50IGZvciBteSByZXBseT8K ClNvIEkndmUgbG9va2VkIGF0IHRoaXMgYWdhaW4gYW5kIHNhZGx5IEkgbmVlZCB0byBOQUNLIHRo aXMgcGF0Y2guIEl0IGlzCmEgdG90YWwgQVBJIGFidXNlIG9mIHRoZSBkbWFfcG9vbCBBUEkgYW5k IGV2ZW4gdGhlIHBhdGNoIGludHJvZHVjaW5nCnRoZSBkbWFfcG9vbCB1c2FnZSBpbiB0aGlzIGRy aXZlciBpcyB3cm9uZyBhbmQgc2hvdWxkIGJlIHJldmVydGVkLgoKVGhlIFNETUEgbmVlZCBjb250 aWd1b3VzIGJ1ZmZlciBkZXNjcmlwdG9ycyBmb3IgZWFjaCBjaGFubmVsLCBzb21ldGhpbmcKdGhl IGRtYV9wb29sIGFic3RyYWN0aW9uIGlzbid0IGFibGUgdG8gcHJvdmlkZS4gU28gZWl0aGVyIHRo ZSBkbWFfcG9vbAppbXBsZW1lbnRhdGlvbiBuZWVkcyB0byBiZSBleHRlbmRlZCB0byBzdXBwb3J0 IHRoaXMgdXNlLWNhc2UsIG9yIHlvdQpjYW4ndCB1c2UgdGhpcyBhdCBhbGwgaW4gdGhlIHNkbWEg ZHJpdmVyLiBBZGRpbmcgaGFja3MsIHdoaWNoIGFyZQphYnVzaW5nIHRoZSBBUEksIHRvIGNyYW0g YSBkbWFfcG9vbCBpbnRvIHRoZSBzZG1hIGRyaXZlciBpcyBub3QgYSB2YWxpZAp3YXkgdG8gaW1w bGVtZW50IHRoaW5ncyBmb3IgdXBzdHJlYW0uCgpSZWdhcmRzLApMdWNhcwoKPiA+IC0tLS0tT3Jp Z2luYWwgTWVzc2FnZS0tLS0tCj4gPiBGcm9tOiBSb2JpbiBHb25nCj4gPiBTZW50OiAyMDE45bm0 N+aciDI15pelIDk6MjUKPiA+IFRvOiAnTHVjYXMgU3RhY2gnIDxsLnN0YWNoQHBlbmd1dHJvbml4 LmRlPjsgdmtvdWxAa2VybmVsLm9yZzsKPiA+IGRhbi5qLndpbGxpYW1zQGludGVsLmNvbTsgcy5o YXVlckBwZW5ndXRyb25peC5kZTsgbGludXhAYXJtbGludXgub3IKPiA+IGcudWsKPiA+IENjOiBk bWFlbmdpbmVAdmdlci5rZXJuZWwub3JnOyBkbC1saW51eC1pbXggPGxpbnV4LWlteEBueHAuY29t PjsKPiA+IGtlcm5lbEBwZW5ndXRyb25peC5kZTsgbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZy YWRlYWQub3JnOwo+ID4gbGludXgta2VybmVsQHZnZXIua2VybmVsLm9yZwo+ID4gU3ViamVjdDog UkU6IFtQQVRDSCB2MyAzLzNdIGRtYWVuZ2luZTogaW14LXNkbWE6IGFsbG9jYXRlIG1heCAyMAo+ ID4gYmRzIGZvciBvbmUKPiA+IHRyYW5zZmVyCj4gPiAKPiA+ID4gLS0tLS1PcmlnaW5hbCBNZXNz YWdlLS0tLS0KPiA+ID4gRnJvbTogTHVjYXMgU3RhY2ggW21haWx0bzpsLnN0YWNoQHBlbmd1dHJv bml4LmRlXQo+ID4gPiBTZW50OiAyMDE45bm0N+aciDI05pelIDE3OjIyCj4gPiA+IFRvOiBSb2Jp biBHb25nIDx5aWJpbi5nb25nQG54cC5jb20+OyB2a291bEBrZXJuZWwub3JnOwo+ID4gPiBkYW4u ai53aWxsaWFtc0BpbnRlbC5jb207IHMuaGF1ZXJAcGVuZ3V0cm9uaXguZGU7Cj4gPiA+IGxpbnV4 QGFybWxpbnV4Lm9yZy51awo+ID4gPiBDYzogZG1hZW5naW5lQHZnZXIua2VybmVsLm9yZzsgZGwt bGludXgtaW14IDxsaW51eC1pbXhAbnhwLmNvbT47Cj4gPiA+IGtlcm5lbEBwZW5ndXRyb25peC5k ZTsgbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnOwo+ID4gPiBsaW51eC1rZXJu ZWxAdmdlci5rZXJuZWwub3JnCj4gPiA+IFN1YmplY3Q6IFJlOiBbUEFUQ0ggdjMgMy8zXSBkbWFl bmdpbmU6IGlteC1zZG1hOiBhbGxvY2F0ZSBtYXggMjAKPiA+ID4gYmRzCj4gPiA+IGZvciBvbmUg dHJhbnNmZXIKPiA+ID4gCj4gPiA+IEFtIE1vbnRhZywgZGVuIDIzLjA3LjIwMTgsIDEzOjU1ICsw MDAwIHNjaHJpZWIgUm9iaW4gR29uZzoKPiA+ID4gPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0t LS0tCj4gPiA+ID4gPiBGcm9tOiBMdWNhcyBTdGFjaCBbbWFpbHRvOmwuc3RhY2hAcGVuZ3V0cm9u aXguZGVdCj4gPiA+ID4gPiBTZW50OiAyMDE45bm0N+aciDIz5pelIDE4OjU0Cj4gPiA+ID4gPiBU bzogUm9iaW4gR29uZyA8eWliaW4uZ29uZ0BueHAuY29tPjsgdmtvdWxAa2VybmVsLm9yZzsKPiA+ ID4gPiA+IGRhbi5qLndpbGxpYW1zQGludGVsLmNvbTsgcy5oYXVlckBwZW5ndXRyb25peC5kZTsK PiA+ID4gPiA+IGxpbnV4QGFybWxpbnV4Lm9yIGcudWsKPiA+ID4gPiA+IENjOiBkbWFlbmdpbmVA dmdlci5rZXJuZWwub3JnOyBkbC1saW51eC1pbXggPGxpbnV4LWlteEBueHAuY28KPiA+ID4gPiA+ IG0+Owo+ID4gPiA+ID4ga2VybmVsQHBlbmd1dHJvbml4LmRlOyBsaW51eC1hcm0ta2VybmVsQGxp c3RzLmluZnJhZGVhZC5vcmc7Cj4gPiA+ID4gPiBsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3Jn Cj4gPiA+ID4gPiBTdWJqZWN0OiBSZTogW1BBVENIIHYzIDMvM10gZG1hZW5naW5lOiBpbXgtc2Rt YTogYWxsb2NhdGUgbWF4Cj4gPiA+ID4gPiAyMAo+ID4gPiA+ID4gYmRzIGZvciBvbmUgdHJhbnNm ZXIKPiA+ID4gPiA+IAo+ID4gPiA+ID4gQW0gRGllbnN0YWcsIGRlbiAyNC4wNy4yMDE4LCAwMTo0 NiArMDgwMCBzY2hyaWViIFJvYmluIEdvbmc6Cj4gPiA+ID4gPiA+IElmIG11bHRpLWJkcyB1c2Vk IGluIG9uZSB0cmFuc2ZlciwgYWxsIGJkcyBzaG91bGQgYmUKPiA+ID4gPiA+ID4gY29uc2lzdGVu Cj4gPiA+ID4gPiA+IG1lbW9yeS5UbyBlYXNpbHkgZm9sbG93IGl0LCBlbmxhcmdlIHRoZSBkbWEg cG9vbCBzaXplIGludG8KPiA+ID4gPiA+ID4gMjAKPiA+ID4gPiA+ID4gYmRzLCBhbmQgaXQgd2ls bCByZXBvcnQgZXJyb3IgaWYgdGhlIG51bWJlciBvZiBiZHMgaXMgb3Zlcgo+ID4gPiA+ID4gPiB0 aGFuCj4gPiA+ID4gPiA+IDIwLiBGb3IgZG1hdGVzdCwgdGhlIG1heCBjb3VudCBmb3Igc2luZ2xl IHRyYW5zZmVyIGlzCj4gPiA+ID4gPiA+IE5VTV9CRCAqCj4gPiA+ID4gPiAKPiA+ID4gPiA+IFNE TUFfQkRfTUFYX0NOVAo+ID4gPiA+ID4gPiA9IDIwICogNjU1MzUgPSB+MS4yOE1CLgo+ID4gPiA+ ID4gCj4gPiA+ID4gPiBCb3RoIHRoZSBjb21taXQgbWVzc2FnZSBhbmQgdGhlIGNvbW1lbnQgbmVl ZCBhIGxvdCBtb3JlIGNhcmUKPiA+ID4gPiA+IHRvCj4gPiA+ID4gPiBhY3R1YWxseSB0ZWxsIHdo YXQgdGhpcyBjb21taXQgaXMgdHJ5aW5nIHRvIGFjaGlldmUuCj4gPiA+ID4gPiBDdXJyZW50bHkg SQo+ID4gPiA+ID4gZG9uJ3QgZm9sbG93IGF0IGFsbC4gV2hhdCBkb2VzICJjb25zaXN0ZW4iIG1l YW4/IERvIHlvdSBtZWFuCj4gPiA+ID4gPiBCRHMKPiA+ID4gPiA+IHNob3VsZCBiZSBjb250aWd1 b3VzIGluIG1lbW9yeT8KPiA+ID4gPiAKPiA+ID4gPiBZZXMsIEJEcyBzaG91bGQgYmUgY29udGln dW91c8KgwqBvbmUgYnkgb25lIGluIG1lbW9yeS4KPiA+ID4gCj4gPiA+IE9rYXksIGJ1dCB0aGlz IGlzbid0IHdoYXQgdGhlIGNvZGUgY2hhbmdlIGRvZXMuIEJ5IGluY3JlYXNpbmcgdGhlCj4gPiA+ IHNpemUKPiA+ID4gcGFyYW1ldGVyIG9mIHRoZSBkbWEgcG9vbCB5b3UganVzdCBhbGxvY2F0ZSAy MCB0aW1lcyBhcyBtdWNoCj4gPiA+IG1lbW9yeSBhcwo+ID4gPiBuZWVkZWQgZm9yIGVhY2ggQkQu IFNvIGFjdHVhbGx5IHRoZSBCRHMgZW5kIHVwIGJlaW5nIHZlcnkgbm9uLQo+ID4gPiBjb250aWd1 b3VzIGluIG1lbW9yeSBhcyB0aGVyZSBhcmUgbm93IGhvbGVzIG9mIDE5IEJEIHNpemVzCj4gPiA+ IGJldHdlZW4gdGhlCj4gPiAKPiA+IHN0YXJ0IG9mIGVhY2ggQkQuCj4gPiBQbGVhc2Ugbm90aWNl IG9ubHkgYWxsb2NhdGUgYmRzIG1lbW9yeSBmcm9tIGRtYSBwb29sIG9uZSB0aW1lIGV2ZW4KPiA+ IGluIG11bHRpCj4gPiBiZHMuCj4gPiBUaGF0J3MgZGlmZmVyZW50IHdpdGggdGhlIGNvbW1vbiB1 c2UgY2FzZSB0aGF0IGFsbG9jYXRlIG1lbW9yeSBmcm9tCj4gPiBkbWEKPiA+IHBvb2wgZXZlcnl0 aW1lIGZvciBldmVyeSBiZC4gV2h5IGRvIHRoaXMgaXMgdG8gbWFrZSBzdXJlIGFsbCBiZAo+ID4g bWVtb3J5IGlzCj4gPiBjb250aWd1b3VzIGZvciBzaW5nbGUgdHJhbnNmZXIgd2hhdGV2ZXIgc2lu Z2xlIGJkIG9yIG11bHRpLWJkcywKPiA+IHNpbmNlIHR3byBjYWxsCj4gPiBkbWFfcG9vbF9hbGxv YygpIGNhbid0IHByb21pc2UgdGhlIGFkZHJlc3MgaXMgY29udGlndW91cyBlc3BlY2lhbGx5Cj4g PiBmb3IgbXVsdGkKPiA+IHRocmVhZCBjYXNlIHN1Y2ggYXMgZG1hdGVzdCAndGhyZWFkc19wZXJf Y2hhbiA9IDUnLiBZb3UgY2FuIGNoYW5nZQo+ID4gdG8gJwo+ID4gbm9yYW5kb209dHJ1ZSAnIGFu ZCAnIHRlc3RfYnVmX3NpemUgPSAxNjM4NDAnIGluIGRtYXRlc3QuYyB0byBsb29rCj4gPiB3aGF0 IGlzc3VlCj4gPiBjb21pbmcgd2l0aG91dCB0aGlzIHBhdGNoLgo+ID4gPiAKPiA+ID4gU28gc29t ZXRoaW5nIGlzbid0IHJpZ2h0IHdpdGggdGhpcyBjaGFuZ2UuCj4gPiAKPiA+IEkgdGhpbmsgdGhp cyBwYXRjaCBpcyB0aGUgZWFzeSB3YXkgdG8gcmVzb2x2ZSB0aGUgYmQgY29udGlndW91cwo+ID4g aXNzdWUsIGJ1dCB0aGUKPiA+IGNvc3QgaXMgdG8gYWxsb2NhdGUgbW9yZSBkbWEgcG9vbCBtZW1v cnkgd2hpY2ggbWF5IG5vdCB1c2VkLgo+ID4gPiAKPiA+ID4gUmVnYXJkcywKPiA+ID4gTHVjYXMK PiA+ID4gCj4gPiA+ID4gPiAKPiA+ID4gPiA+IFdoYXQgZG8geW91IGdhaW4gYnkgb3Zlci1hbGxv Y2F0aW5nIGVhY2ggQkQgYnkgYSBmYWN0b3Igb2YKPiA+ID4gPiA+IDIwPwo+ID4gPiA+IAo+ID4g PiA+IEkgZ3Vlc3MgZG1hX3Bvb2xfYWxsb2Mgd2lsbCByZXR1cm4gZXJyb3IgaW4gc3VjaCBjYXNl LCBhbmQgdGhlbgo+ID4gPiA+IGNhdXNlIGRtYSBzZXR1cCB0cmFuc2ZlciBmYWlsdXJlLgo+ID4g PiA+ID4gCj4gPiA+ID4gPiBSZWdhcmRzLAo+ID4gPiA+ID4gTHVjYXMKPiA+ID4gPiA+IAo+ID4g PiA+ID4gPiBTaWduZWQtb2ZmLWJ5OiBSb2JpbiBHb25nIDx5aWJpbi5nb25nQG54cC5jb20+Cj4g PiA+ID4gPiA+IC0tLQo+ID4gPiA+ID4gPiDCoGRyaXZlcnMvZG1hL2lteC1zZG1hLmMgfCAxNyAr KysrKysrKysrKysrKysrLQo+ID4gPiA+ID4gPiDCoDEgZmlsZSBjaGFuZ2VkLCAxNiBpbnNlcnRp b25zKCspLCAxIGRlbGV0aW9uKC0pCj4gPiA+ID4gPiA+IAo+ID4gPiA+ID4gPiBkaWZmIC0tZ2l0 IGEvZHJpdmVycy9kbWEvaW14LXNkbWEuYyBiL2RyaXZlcnMvZG1hL2lteC0KPiA+ID4gPiA+ID4g c2RtYS5jCj4gPiA+ID4gPiA+IGluZGV4Cj4gPiA+ID4gPiA+IGI0ZWMyZDIuLjU5NzM0ODkgMTAw NjQ0Cj4gPiA+ID4gPiA+IC0tLSBhL2RyaXZlcnMvZG1hL2lteC1zZG1hLmMKPiA+ID4gPiA+ID4g KysrIGIvZHJpdmVycy9kbWEvaW14LXNkbWEuYwo+ID4gPiA+ID4gPiBAQCAtMjk4LDYgKzI5OCwx NSBAQCBzdHJ1Y3Qgc2RtYV9jb250ZXh0X2RhdGEgewo+ID4gPiA+ID4gPiA+IMKgCXUzMsKgwqBz Y3JhdGNoNzsKPiA+ID4gPiA+ID4gCj4gPiA+ID4gPiA+IMKgfSBfX2F0dHJpYnV0ZV9fICgocGFj a2VkKSk7Cj4gPiA+ID4gPiA+IAo+ID4gPiA+ID4gPiArLyoKPiA+ID4gPiA+ID4gKyAqIEFsbCBi ZHMgaW4gb25lIHRyYW5zZmVyIHNob3VsZCBiZSBjb25zaXRlbnQgb24gU0RNQS4gVG8KPiA+ID4g PiA+ID4gZWFzaWx5Cj4gPiA+ID4gPiA+ICtmb2xsb3cgaXQsanVzdAo+ID4gPiA+ID4gPiArICog c2V0IHRoZSBkbWEgcG9vbCBzaXplIGFzIHRoZSBlbm91Z2ggYmRzLiBGb3IgZXhhbXBsZSwKPiA+ ID4gPiA+ID4gaW4KPiA+ID4gPiA+ID4gZG1hdGVzdAo+ID4gPiA+ID4gPiArY2FzZSwgdGhlCj4g PiA+ID4gPiA+ICsgKiBtYXggMjAgYmRzIG1lYW5zIHRoZSBtYXggZm9yIHNpbmdsZSB0cmFuc2Zl ciBpcyBOVU1fQkQKPiA+ID4gPiA+ID4gKgo+ID4gPiA+ID4gPiArU0RNQV9CRF9NQVhfQ05UID0g MjAKPiA+ID4gPiA+ID4gKyAqICogNjU1MzUgPSB+MS4yOE1CLiAyMCBiZHMgc3VwcG9zZWQgdG8g YmUgZW5vdWdoCj4gPiA+ID4gPiA+IGJhc2ljYWxseS5JZgo+ID4gPiA+ID4gPiBpdCdzCj4gPiA+ ID4gPiA+ICtzdGlsbCBub3QKPiA+ID4gPiA+ID4gKyAqIGVub3VnaCBpbiBzb21lIHNwZWNpZmlj IGNhc2VzLCBlbmxhcmdlIGl0IGhlcmUuV2FybmluZwo+ID4gPiA+ID4gPiBtZXNzYWdlCj4gPiA+ ID4gPiA+ICt3b3VsZCBhbHNvCj4gPiA+ID4gPiA+ICsgKiBhcHBlYXIgaWYgdGhlIGJkIG51bWJl cnMgaXMgb3ZlciB0aGFuIDIwLgo+ID4gPiA+ID4gPiArICovCj4gPiA+ID4gPiA+ICsjZGVmaW5l IE5VTV9CRCAyMAo+ID4gPiA+ID4gPiAKPiA+ID4gPiA+ID4gwqBzdHJ1Y3Qgc2RtYV9lbmdpbmU7 Cj4gPiA+ID4gPiA+IAo+ID4gPiA+ID4gPiBAQCAtMTI3Myw3ICsxMjgyLDcgQEAgc3RhdGljIGlu dAo+ID4gPiA+ID4gPiBzZG1hX2FsbG9jX2NoYW5fcmVzb3VyY2VzKHN0cnVjdCBkbWFfY2hhbiAq Y2hhbikKPiA+ID4gPiA+ID4gPiDCoAkJZ290byBkaXNhYmxlX2Nsa19haGI7Cj4gPiA+ID4gPiA+ ID4gwqAJc2RtYWMtPmJkX3Bvb2wgPSBkbWFfcG9vbF9jcmVhdGUoImJkX3Bvb2wiLAo+ID4gPiA+ ID4gPiA+IGNoYW4tCj4gPiA+ID4gPiA+ID4gPiBkZXZpY2UtPmRldiwKPiA+ID4gPiA+ID4gPiAK PiA+ID4gPiA+ID4gPiAtCQkJCXNpemVvZihzdHJ1Y3QKPiA+ID4gPiA+ID4gPiBzZG1hX2J1ZmZl cl9kZXNjcmlwdG9yKSwKPiA+ID4gPiA+ID4gPiArCQkJCU5VTV9CRCAqIHNpemVvZihzdHJ1Y3QK PiA+ID4gPiA+ID4gPiBzZG1hX2J1ZmZlcl9kZXNjcmlwdG9yKSwKPiA+ID4gPiA+ID4gPiDCoAkJ CQkzMiwgMCk7Cj4gPiA+ID4gPiA+ID4gwqAJcmV0dXJuIDA7Cj4gPiA+ID4gPiA+IAo+ID4gPiA+ ID4gPiBAQCAtMTMxNCw2ICsxMzIzLDEyIEBAIHN0YXRpYyBzdHJ1Y3Qgc2RtYV9kZXNjCj4gPiA+ ID4gPiA+ICpzZG1hX3RyYW5zZmVyX2luaXQoc3RydWN0IHNkbWFfY2hhbm5lbCAqc2RtYWMsCj4g PiA+ID4gPiA+IMKgewo+ID4gPiA+ID4gPiA+IMKgCXN0cnVjdCBzZG1hX2Rlc2MgKmRlc2M7Cj4g PiA+ID4gPiA+ID4gKwlpZiAoYmRzID4gTlVNX0JEKSB7Cj4gPiA+ID4gPiA+ID4gKwkJZGV2X2Vy cihzZG1hYy0+c2RtYS0+ZGV2LCAiJWQgYmRzIGV4Y2VlZAo+ID4gPiA+ID4gPiA+IHRoZQo+ID4g PiA+ID4gPiA+IG1heCAlZFxuIiwKPiA+ID4gPiA+ID4gPiArCQkJYmRzLCBOVU1fQkQpOwo+ID4g PiA+ID4gPiA+ICsJCWdvdG8gZXJyX291dDsKPiA+ID4gPiA+ID4gPiArCX0KPiA+ID4gPiA+ID4g Cj4gPiA+ID4gPiA+ICsKPiA+ID4gPiA+ID4gPiDCoAlkZXNjID0ga3phbGxvYygoc2l6ZW9mKCpk ZXNjKSksIEdGUF9OT1dBSVQpOwo+ID4gPiA+ID4gPiA+IMKgCWlmICghZGVzYykKPiA+ID4gPiA+ ID4gPiDCoAkJZ290byBlcnJfb3V0OwotLS0KVG8gdW5zdWJzY3JpYmUgZnJvbSB0aGlzIGxpc3Q6 IHNlbmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlIGRtYWVuZ2luZSIgaW4KdGhlIGJvZHkgb2YgYSBt ZXNzYWdlIHRvIG1ham9yZG9tb0B2Z2VyLmtlcm5lbC5vcmcKTW9yZSBtYWpvcmRvbW8gaW5mbyBh dCAgaHR0cDovL3ZnZXIua2VybmVsLm9yZy9tYWpvcmRvbW8taW5mby5odG1sCg==