From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?utf-8?B?QWxsZW4gSHN1ICjoqLHlmInpipgp?= Subject: RE: [PATCH v2 1/2] usb: dwc2: alloc dma aligned buffer for isoc split in Date: Mon, 7 May 2018 07:19:46 +0000 Message-ID: References: <1525230288-6014-1-git-send-email-william.wu@rock-chips.com> <1525230288-6014-2-git-send-email-william.wu@rock-chips.com> <8ce56264-cdd1-1a12-c642-79224c65f639@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: Content-Language: zh-TW List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+glpar-linux-rockchip=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Doug Anderson , wlf Cc: "felipe.balbi-VuQAYsv1563Yd54FQh9/CA@public.gmane.org" , =?utf-8?B?6buE5rab?= , =?utf-8?B?546L5b6B5aKe?= , =?utf-8?B?SGVpa28gU3TDvGJuZXI=?= , Sergei Shtylyov , "open list:ARM/Rockchip SoC..." , Frank Wang , Greg Kroah-Hartman , "linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "zsq-TNX95d0MmH7DzftRWevZcw@public.gmane.org" , LKML , John Youn , "hminas-HKixBCOQz3hWk0Htik3J/w@public.gmane.org" , William Wu , Stan Tsui , "daniel.meng" , =?utf-8?B?Q2xhdWQgQ2hhbmcgKOW8teaBreeviSk=?= List-Id: linux-rockchip.vger.kernel.org QWRkIG1vcmU6DQoNCg0KQmVzdCByZWdhcmRzLA0KQlU0IEVFDQpBbGxlbiBIc3UNClFDSSA4ODYt My0zMjctMjM0NSBleHQgMTU0MTANCg0KLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCkZyb206 IERvdWcgQW5kZXJzb24gW21haWx0bzpkaWFuZGVyc0Bnb29nbGUuY29tXSANClNlbnQ6IEZyaWRh eSwgTWF5IDQsIDIwMTggMTE6NTggUE0NClRvOiB3bGYgPHd1bGZAcm9jay1jaGlwcy5jb20+DQpD YzogV2lsbGlhbSBXdSA8d2lsbGlhbS53dUByb2NrLWNoaXBzLmNvbT47IGhtaW5hc0BzeW5vcHN5 cy5jb207IGZlbGlwZS5iYWxiaUBsaW51eC5pbnRlbC5jb207IEdyZWcgS3JvYWgtSGFydG1hbiA8 Z3JlZ2toQGxpbnV4Zm91bmRhdGlvbi5vcmc+OyBTZXJnZWkgU2h0eWx5b3YgPHNlcmdlaS5zaHR5 bHlvdkBjb2dlbnRlbWJlZGRlZC5jb20+OyBIZWlrbyBTdMO8Ym5lciA8aGVpa29Ac250ZWNoLmRl PjsgTEtNTCA8bGludXgta2VybmVsQHZnZXIua2VybmVsLm9yZz47IGxpbnV4LXVzYkB2Z2VyLmtl cm5lbC5vcmc7IG9wZW4gbGlzdDpBUk0vUm9ja2NoaXAgU29DLi4uIDxsaW51eC1yb2NrY2hpcEBs aXN0cy5pbmZyYWRlYWQub3JnPjsgRnJhbmsgV2FuZyA8ZnJhbmsud2FuZ0Byb2NrLWNoaXBzLmNv bT47IOm7hOa2myA8aHVhbmd0YW9Acm9jay1jaGlwcy5jb20+OyBkYW5pZWwubWVuZyA8ZGFuaWVs Lm1lbmdAcm9jay1jaGlwcy5jb20+OyBKb2huIFlvdW4gPEpvaG4uWW91bkBzeW5vcHN5cy5jb20+ OyDnjovlvoHlop4gPHd6ekByb2NrLWNoaXBzLmNvbT47IHpzcUByb2NrLWNoaXBzLmNvbTsgQWxs ZW4gSHN1ICjoqLHlmInpipgpIDxBbGxlbi5Ic3VAcXVhbnRhdHcuY29tPjsgU3RhbiBUc3VpIDxT dGFuVHN1aUBhb3Blbi5jb20+DQpTdWJqZWN0OiBSZTogW1BBVENIIHYyIDEvMl0gdXNiOiBkd2My OiBhbGxvYyBkbWEgYWxpZ25lZCBidWZmZXIgZm9yIGlzb2Mgc3BsaXQgaW4NCg0KSGksDQoNCk9u IFdlZCwgTWF5IDIsIDIwMTggYXQgMTA6MTQgQU0sIHdsZiA8d3VsZkByb2NrLWNoaXBzLmNvbT4g d3JvdGU6DQo+IEl0J3MgYSBnb29kIHdheSB0byBhbGxvY2F0ZSBhbiBleHRyYSAzIGJ5dGVzIGlu IHRoZSBvcmlnaW5hbCBib3VuY2UgDQo+IGJ1ZmZlciBmb3IgdGhpcyB1bmFsaWduZWQNCj4gaXNz dWXvvIwgaXQncyBzaW1pbGFyIHRvIHRoZSB0YWlscm9vbSBvZiBza19idWZmLiBIb3dldmVyLCBq dXN0IGFzIHlvdSANCj4gc2FpZCwgd2UnZCBiZXR0ZXIgZmluZCB0aGUgc3BlY2lhbCBjYXNlcyB3 aGVyZSB3ZSBuZWVkIGFuIG92ZXJzaXplZCANCj4gYm91bmNlIGJ1ZmZlciwgb3RoZXJ3aXNl77yM d2UNCj4gbmVlZCB0byBhbGxvY2F0ZQ0KPiBhIGJvdW5jZSBidWZmZXIgZm9yIGFsbCBvZiB1cmJz Lg0KPg0KPiBJdCdzIGhhcmQgZm9yIG1lIHRvIGtub3cgdGhlIHNwZWNpYWwgY2FzZXMgaW4gdGhl IA0KPiBkd2MyX2FsbG9jX2RtYV9hbGlnbmVkX2J1ZmZlcigpLCBiZWNhdXNlIGl0J3MgY2FsbGVk IGZyb20gDQo+IHVzYl9zdWJtaXRfdXJiKCkgaW4gdGhlIGRldmljZSBjbGFzcyBkcml2ZXIsIGFu ZCBJIGhhcmRseSBrbm93IHRoZSANCj4gc3BsaXQgc3RhdGUgaW4gdGhpcyBwcm9jZXNzLCBtdWNo IGxlc3MgaWYgdGhlIHNwbGl0IHRyYW5zYWN0aW9uIG5lZWQgDQo+IGFsaWduZWQgYnVmZmVyLiBE byB5b3UgaGF2ZSBhbnkgaWRlYT8NCj4NCj4gSSBzdXBwb3NlIHRoYXQgd2UgY2FuJ3QgZmluZCB0 aGUgc3BlY2lhbCBjYXNlcyB3aGVyZSB3ZSBuZWVkIGFuIA0KPiBvdmVyc2l6ZWQgYm91bmNlIGJ1 ZmZlciBpbiB0aGUgZHdjMl9hbGxvY19kbWFfYWxpZ25lZF9idWZmZXIoKSwgYW5kIGlmIA0KPiB3 ZSBzdGlsbCB3YW50IHRvIHJlLXVzZSB0aGUgb3JpZ2luYWwgYm91bmNlIGJ1ZmZlciB3aXRoIGV4 dHJhIDMgYnl0ZXMsIA0KPiB0aGVuIHdlIG5lZWQgdG8gYWxsb2NhdGUgYSAgYm91bmNlIGJ1ZmZl ciBmb3IgYWxsIG9mIHVyYnMsIGFuZCBkbyANCj4gdW5uZWNlc3NhcnkgIGRhdGEgY29weSBmb3Ig dGhlc2UgdXJicyAgd2hvc2UgdHJhbnNmZXJfYnVmZmVyIHdlcmUgDQo+IGFscmVhZHkgYWxpZ25l ZC4gIFRoaXMgbWF5IHJlZHVjZSB0aGUgdHJhbnNtaXNzaW9uIHJhdGUgb2YgVVNCLg0KPg0KPiBD YW4gd2UganVzdCBwcmUtYWxsb2NhdGUgYW4gYWRkaXRpb25hbCBhbGlnbmVkIGJ1ZmZlciAodGhl IHNpemUgaXMgMjAwDQo+IGJ5dGVzKSBmb3Igc3BsaXQgdHJhbnNhY3Rpb24NCj4gaW4gZHdjMl9t YXBfdXJiX2Zvcl9kbWEgZm9yIGFsbCBvZiB1cmJzLiBBbmQgaWYgd2UgZmluZCB0aGUgc3BsaXQg DQo+IHRyYW5zYWN0aW9uIGlzIHVuYWxpZ25lZO+8jA0KPiB3ZSBjYW4gZWFzaWx5IHVzZSB0aGUg cHJlLWFsbG9jYXRlZCBhbGlnbmVkIGJ1ZmZlci4NCg0KT0ssIHNvIHRoaW5raW5nIGFib3V0IHRo aXMgbW9yZS4uLg0KDQpQcmV2aW91c2x5IHRoaW5ncyBnb3QgcmVhbGx5IHNsb3cgYXQgaW50ZXJy dXB0IHRpbWUgYmVjYXVzZSB3ZSB3ZXJlIHRyeWluZyB0byBhbGxvY2F0ZSBhcyBtdWNoIGFzIDY0 SyBhdCBpbnRlcnJ1cHQgdGltZS4gIFRoYXQgd2Fzbid0IHNvIGdyZWF0LiAgSW4geW91ciBjYXNl LCB5b3UncmUgb25seSBhbGxvY2F0aW5nIDIwMCBieXRlcy4gIEFzIEkgdW5kZXJzdGFuZCB0aGlu Z3MsIGFsbG9jYXRpbmcgMjAwIGJ5dGVzIGF0IGludGVycnVwdCB0aW1lIGlzIHByb2JhYmx5IG5v dCBhIGh1Z2UgZGVhbC4NCg0KLi4uc28gSSBndWVzcyBpdCBjb21lIGRvd24gdG8gYSB0cmFkZW9m ZiBoZXJlOiBpcyBpdCB3b3J0aCBlYXRpbmcgMjAwIGJ5dGVzIGZvciBlYWNoIFVSQiB0byBzYXZl IGFuIDIwMCBieXRlIGFsbG9jYXRpb24gYXQgaW50ZXJydXB0IHRpbWUgaW4gdGhpcyBvbmUgcmFy ZSBjYXNlLg0KDQpJJ2QgY2VydGFpbmx5IHdlbGNvbWUgYW55b25lJ3Mgb3BpbmlvbiBoZXJlLCBi dXQgSSdtIGdvaW5nIHRvIGdvIHdpdGggc2F5aW5nIGl0J3MgZmluZSB0byBhbGxvY2F0ZSB0aGUg MjAwIGJ5dGVzIGF0IGludGVycnVwdCB0aW1lIChsaWtlIHlvdXIgcGF0Y2ggZG9lcykuICAuLi5i dXQsIEkgX3RoaW5rXyB5b3Ugd2FudCB0byB1c2UNCmttZW1fY2FjaGVfY3JlYXRlKCkgdG8gY3Jl YXRlIGEgY2FjaGUgYW5kIHRoZW4ga21lbV9jYWNoZV96YWxsb2MoKS4NClNpbmNlIGFsbCBhbGxv Y2F0aW9ucyBhcmUgdGhlIHNhbWUgc2l6ZSBhbmQgeW91IHdhbnQgdGhpcyB0byBiZSBmYXN0LCBJ IHRoaW5rIHVzaW5nIGttZW1fY2FjaGUgaXMgZ29vZC4NCg0KDQoNCj4+PiArICAgICAgIC8qIEZv ciBub24tZHdvcmQgYWxpZ25lZCBidWZmZXJzICovDQo+Pj4gKyAgICAgICBpZiAoaHNvdGctPnBh cmFtcy5ob3N0X2RtYSA+IDAgJiYgcWgtPmRvX3NwbGl0ICYmDQo+Pj4gKyAgICAgICAgICAgY2hh bi0+ZXBfaXNfaW4gJiYgKGNoYW4tPnhmZXJfZG1hICYgMHgzKSkgew0KPj4NCj4+IFNvIHdoYXQg aGFwcGVucyBpZiB3ZXJlIHVuYWxpZ25lZCAoQUtBIChjaGFuLT54ZmVyX2RtYSAmIDB4MykpIGJ1 dCANCj4+IHdlJ3JlIG5vdCBkb2luZyBzcGxpdCBvciBpdCdzIG5vdCBhbiBJTiBFUD8gIERvIHdl IGp1c3QgZmFpbCB0aGVuPw0KPj4NCj4+IEkgZ3Vlc3MgdGhlIHJlc3Qgb2YgdGhpcyBwYXRjaCBv bmx5IGhhbmRsZXMgdGhlICJpbiIgY2FzZSBhbmQgbWF5YmUgDQo+PiB5b3UgZXhwZWN0IHRoYXQg dGhlIHByb2JsZW1zIHdpbGwgb25seSBjb21lIGFib3V0IGZvciBkb19zcGxpdCwgYnV0IA0KPj4g aXQgc3RpbGwgbWlnaHQgYmUgd2lzZSB0byBhdCBsZWFzdCBwcmludCBhIHdhcm5pbmcgaW4gdGhl IG90aGVyIGNhc2VzPw0KPj4gPkZyb20gcmVhZGluZyBkd2MyX2hjX2luaXRfeGZlcigpIGl0IHNl ZW1zIGxpa2UgeW91IGNvdWxkIHJ1biBpbnRvIA0KPj4gPnRoaXMNCj4+IHNhbWUgcHJvYmxlbSBp biB0aGUgIm91dCIgY2FzZT8NCj4NCj4gQWN0dWFsbHksIEkgb25seSBmaW5kIG5vbi1kd29yZCBh bGlnbmVkIGlzc3VlIGluIHRoZSBjYXNlIG9mIHNwbGl0IGluIA0KPiB0cmFuc2FjdGlvbi4NCj4g QW5kIEkgdGhpbmsgdGhhdCBpZiB3ZSdyZSBub3QgZG9pbmcgc3BsaXQgb3IgaXQncyBhbiBPVVQg RVAsIHdlIGNhbiANCj4gYWx3YXlzIGdldCBhbGlnbmVkIGJ1ZmZlciBpbiB0aGUgY3VycmVudCBj b2RlLiBGb3Igbm9uLXNwbGl0IGNhc2UsIHRoZSANCj4gZHdjMl9hbGxvY19kbWFfYWxpZ25lZF9i dWZmZXIoKSBpcyBlbm91Z2guIEFuZCBmb3Igc3BsaXQgb3V0IGNhc2UsIGlmIA0KPiB0aGUgdHJh bnNhY3Rpb24gaXMgc3ViZGl2aWRlZCBpbnRvIG11bHRpcGxlIHN0YXJ0LXNwbGl0cywgZWFjaCB3 aXRoIGEgDQo+IGRhdGEgcGF5bG9hZCBvZiAxODggYnl0ZXMgb3IgbGVzcywgc28gdGhlIERNQSBh ZGRyZXNzIGlzIGFsd2F5cyANCj4gYWxpZ25lZC4NCg0KQ2FuIHlvdSBhdCBsZWFzdCBwcmludCBh biBlcnJvciBtZXNzYWdlIGlmIHlvdSBlbmQgdXAgd2l0aCBub24tYWxpZ25lZCBETUEgaW4gb25l IG9mIHRoZSBvdGhlciBjYXNlcz8NCg0KDQo+Pj4gRE1BX0ZST01fREVWSUNFKTsNCj4+PiArICAg ICAgICAgICAgICAgbWVtY3B5KHF0ZC0+dXJiLT5idWYgKyBmcmFtZV9kZXNjLT5vZmZzZXQgKw0K Pj4+ICsgICAgICAgICAgICAgICAgICAgICAgcXRkLT5pc29jX3NwbGl0X29mZnNldCwgDQo+Pj4g KyBjaGFuLT5xaC0+ZHdfYWxpZ25fYnVmLA0KPj4+IGxlbik7DQo+Pg0KPj4gQXNzdW1pbmcgSSdt IHVuZGVyc3RhbmRpbmcgdGhpcyBwYXRjaCBjb3JyZWN0bHksIEkgdGhpbmsgaXQgd291bGQgYmUg DQo+PiBiZXR0ZXIgdG8gd3JpdGU6DQo+Pg0KPj4gICAgbWVtY3B5KHF0ZC0+eGZlcl9kbWEsIGNo YW4tPnFoLT5kd19hbGlnbl9idWYsIGxlbik7DQo+DQo+IFNvcnJ5LCB0aGVyZSdzIG5vICJ4ZmVy X2J1ZiIgaW4gcXRkLCBkbyB5b3UgbWVhbnMgdGhlIA0KPiAiY2hhbi0+eGZlcl9kbWEiPyBJZiBp dCdzLCBJIHRoaW5rIHdlIGNhbid0IGRvIG1lbWNweSBmcm9tIGEgdHJhbnNmZXIgDQo+IGJ1ZmZl ciB0byBhIERNQSBhZGRyZXNzLiBNYXliZSBjaGFuLT54ZmVyX2J1ZiBpcyBtb3JlIHN1aXRhYmxl LCBidXQgaXQgDQo+IHNlZW1zIHRoYXQgdGhlIGR3YzIgZHJpdmVyIGRvZXNuJ3QgdXBkYXRlIHRo ZSBjaGFuLT54ZmVyX2J1ZiBmb3IgaXNvYyANCj4gdHJhbnNmZXIgd2l0aCBkbWEgZW5hYmxlZCBp biBkd2MyX2hjX2luaXRfeGZlcigpLg0KDQpZZXMsIEkgbWVhbnQgY2hhbi0+eGZlcl9kbWEuICBB aCwgcmlnaHQuICB4ZmVyX2RtYSBpcyBhIERNQSBhZGRyZXNzLg0KDQpJIGd1ZXNzIHlvdSBjb3Vs ZCBpbiB0aGVvcnkgeW91IGNvdWxkIGRvOg0KDQptZW1jcHkocXRkLT51cmItPmJ1ZiArIChjaGFu LT54ZmVyX2RtYSAtIHVyYi0+ZG1hKSwNCiAgICBjaGFuLT5xaC0+ZHdfYWxpZ25fYnVmKTsNCg0K VGhhdCBhdCBsZWFzdCBhdm9pZHMgZHVwbGljYXRpbmcgdGhlIG1hdGguICBNYXliZSBlaXRoZXIg ZG8gdGhhdCwgb3IgaWYgeW91IGRvbid0IGxpa2UgaXQgYXQgbGVhc3QgYWRkIGEgY29tbWVudCBz YXlpbmcgdGhhdCB0aGUgbWF0aCBuZWVkcyB0byBtYXRjaCB0aGUgbWF0aCBpbiBkd2MyX2hjX2lu aXRfeGZlcigpLg0KDQoNCj4+IFRoZW4gaWYgeW91IGV2ZXIgZW5kIHVwIGhhdmluZyB0byBhbGln biBhIHRyYW5zZmVyIG90aGVyIHRoYW4gYSBzcGxpdCANCj4+IHlvdSB3b24ndCBiZSBkb2luZyB0 aGUgd3JvbmcgbWF0aC4gIEFzIGl0IGlzIGl0J3MgdmVyeSBub24tb2J2aW91cyANCj4+IHRoYXQg eW91J3JlIGhhcmRjb2RpbmcgdGhlIHNhbWUgZm9ybXVsYSB0aGF0J3MgaW4gZHdjMl9oY19pbml0 X3hmZXIoKQ0KPg0KPiBBY3R1YWxseSwgSSdtIGhhcmRjb2RpbmcgdGhlIHNhbWUgZm9ybXVsYSBm cm9tIHRoZSBvbGQgY29kZSB3aGljaCBoYXMgDQo+IGJlZW4gcmlwcGVkIG91dCBpbiB0aGUgY29t bWl0IDNiYzA0ZTI4YTAzMCAoInVzYjogZHdjMjogaG9zdDogR2V0IA0KPiBhbGlnbmVkIERNQSBp biBhIG1vcmUgc3VwcG9ydGVkIHdheSIpLg0KDQpBaCwgZ290IGl0LiAgV2VsbCwgSSB0aGluayB0 aGUgb2xkIGNvZGUgd2FzIGp1c3QgaGFyZGNvZGluZyB0aGUgc2FtZSBmb3JtdWxhIGluIHR3byBw bGFjZXMgdGhlbi4gIDstKQ0KDQoNCj4+PiAtICAgICAgIGlmIChxaC0+ZGVzY19saXN0KQ0KPj4+ ICsgICAgICAgaWYgKHFoLT5kZXNjX2xpc3QpIHsNCj4+PiAgICAgICAgICAgICAgICAgIGR3YzJf aGNkX3FoX2ZyZWVfZGRtYShoc290ZywgcWgpOw0KPj4+ICsgICAgICAgfSBlbHNlIHsNCj4+PiAr ICAgICAgICAgICAgICAgLyoga2ZyZWUoTlVMTCkgaXMgc2FmZSAqLw0KPj4+ICsgICAgICAgICAg ICAgICBrZnJlZShxaC0+ZHdfYWxpZ25fYnVmKTsNCj4+PiArICAgICAgICAgICAgICAgcWgtPmR3 X2FsaWduX2J1Zl9kbWEgPSAoZG1hX2FkZHJfdCkwOw0KPj4NCj4+IFdoeSBhc3NpZ24gcWgtPmR3 X2FsaWduX2J1Zl9kbWEgdG8gMD8gIFRoZSBuZXh0IHRoaW5nIHlvdSdyZSBkb2luZyBpcyANCj4+ IGtmcmVlKHFoKS4gIElmIHlvdSB3YW50IGV4dHJhIGRlYnVnZ2luZywgdHVybiBvbiBzbHViX2Rl YnVnLg0KPg0KPiBJIGp1c3QgY29weSB0aGUgc2FtZSBjb2RlIGZyb20gdGhlIG9sZCBjb2RlIHdo aWNoIGhhcyBiZWVuIHJpcHBlZCBvdXQgDQo+IGluIHRoZSBjb21taXQgM2JjMDRlMjhhMDMwICgi dXNiOiBkd2MyOiBob3N0OiBHZXQgYWxpZ25lZCBETUEgaW4gYSANCj4gbW9yZSBzdXBwb3J0ZWQg d2F5IikuDQo+IEkgcmVhbGx5IGRvbid0IGtub3cgd2h5IGFzc2lnbiBxaC0+ZHdfYWxpZ25fYnVm X2RtYSB0byAwLg0KDQpUaGVyZSdzIG5vIHJlYXNvbi4gIEp1c3QgcmVtb3ZlIGl0Lg0KDQoNCi1E b3VnDQpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51 eC1yb2NrY2hpcCBtYWlsaW5nIGxpc3QKTGludXgtcm9ja2NoaXBAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJvY2tj aGlwCg==