From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: Re: [PATCH 04/17] drm/i915: Wrap around the tail offset before setting ring->tail Date: Mon, 11 Jun 2018 13:40:00 +0300 Message-ID: <87o9ghwqrj.fsf@gaia.fi.intel.com> References: <20180610194325.13467-1-chris@chris-wilson.co.uk> <20180610194325.13467-5-chris@chris-wilson.co.uk> <87sh5twrv5.fsf@gaia.fi.intel.com> <152871277723.1522.12195794580256136212@mail.alporthouse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 22F5D6E2DD for ; Mon, 11 Jun 2018 10:40:29 +0000 (UTC) In-Reply-To: <152871277723.1522.12195794580256136212@mail.alporthouse.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Q2hyaXMgV2lsc29uIDxjaHJpc0BjaHJpcy13aWxzb24uY28udWs+IHdyaXRlczoKCj4gUXVvdGlu ZyBNaWthIEt1b3BwYWxhICgyMDE4LTA2LTExIDExOjE2OjE0KQo+PiBDaHJpcyBXaWxzb24gPGNo cmlzQGNocmlzLXdpbHNvbi5jby51az4gd3JpdGVzOgo+PiA+IGRpZmYgLS1naXQgYS9kcml2ZXJz L2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9p bnRlbF9yaW5nYnVmZmVyLmMKPj4gPiBpbmRleCA0MDlmNDk5YzBhNDUuLjc5NzBlY2IxOTllMiAx MDA2NDQKPj4gPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmMK Pj4gPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmMKPj4gPiBA QCAtNDk2LDYgKzQ5NiwxMCBAQCBzdGF0aWMgaW50IGluaXRfcmluZ19jb21tb24oc3RydWN0IGlu dGVsX2VuZ2luZV9jcyAqZW5naW5lKQo+PiA+ICAgICAgICAgICAgICAgRFJNX0RFQlVHX0RSSVZF UigiJXMgaW5pdGlhbGl6YXRpb24gZmFpbGVkIFtoZWFkPSUwOHhdLCBmdWRnaW5nXG4iLAo+PiA+ ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBlbmdpbmUtPm5hbWUsIEk5MTVfUkVBRF9I RUFEKGVuZ2luZSkpOwo+PiA+ICAKPj4gPiArICAgICAvKiBDaGVjayB0aGF0IHRoZSByaW5nIG9m ZnNldHMgcG9pbnQgd2l0aGluIHRoZSByaW5nISAqLwo+PiA+ICsgICAgIEdFTV9CVUdfT04oIWlu dGVsX3Jpbmdfb2Zmc2V0X3ZhbGlkKHJpbmcsIHJpbmctPmhlYWQpKTsKPj4gPiArICAgICBHRU1f QlVHX09OKCFpbnRlbF9yaW5nX29mZnNldF92YWxpZChyaW5nLCByaW5nLT50YWlsKSk7Cj4+ID4g Kwo+PiA+ICAgICAgIGludGVsX3JpbmdfdXBkYXRlX3NwYWNlKHJpbmcpOwo+PiA+ICAgICAgIEk5 MTVfV1JJVEVfSEVBRChlbmdpbmUsIHJpbmctPmhlYWQpOwo+PiA+ICAgICAgIEk5MTVfV1JJVEVf VEFJTChlbmdpbmUsIHJpbmctPnRhaWwpOwo+PiA+IEBAIC0xMDY0LDYgKzEwNjgsNyBAQCBpbnQg aW50ZWxfcmluZ19waW4oc3RydWN0IGludGVsX3JpbmcgKnJpbmcsCj4+ID4gIAo+PiA+ICB2b2lk IGludGVsX3JpbmdfcmVzZXQoc3RydWN0IGludGVsX3JpbmcgKnJpbmcsIHUzMiB0YWlsKQo+PiA+ ICB7Cj4+ID4gKyAgICAgdGFpbCA9IGludGVsX3Jpbmdfd3JhcChyaW5nLCB0YWlsKTsKPj4gCj4+ IEkgYW0gcG9uZGVyaW5nIHRoaXMgd3JhcCBoZXJlIGFuZCBpdCdzIHVzZWZ1bG5lc3MuIFdoZXJl Cj4+IGNvdWxkIHdlIGV2ZXIgZ2V0IGEgdGFpbCB3aGljaCBpcyBub3QgdmFsaWQ/IEZyb20gY29y cnVwdGVkCj4+IGNvbnRleHQ/Cj4KPiBJdCdzIGp1c3QgYmVpbmcgZGVmZW5zaXZlLiBXZSBjb3Vs ZCBtYWtlIHRoaXMKPiBHRU1fQlVHX09OKCFvZmZzZXRfdmFsaWQoKSkgaW5zdGVhZD8KPgo+IFlv dXIgY2hvaWNlPwoKVGhhdCB3b3VsZCBiZSBiZXN0IHRvIGFzc2VydCBpdC4KCkZvciBmYW5jeW5l c3MsIHlvdSBjb3VsZCBkbyBhIHJpbmdfb2Zmc2V0X3ZhbGlkIGNoZWNrIGZyb20KYXNzZXJ0X3Jp bmdfdGFpbF92YWxpZCBhcyBpdCBpcyBhIHN1YnNldCBhbmQgc2hhcmUKc29tZSBvZiB0aGUgY2hl Y2tzLgoKLU1pa2EKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3Jn Cmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4 Cg==