From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH 1/2] drm/i915/bxt: work around HW coherency issue when accessing GPU seqno Date: Tue, 09 Jun 2015 11:21:01 +0300 Message-ID: <87bngp8f82.fsf@intel.com> References: <1433780924-7673-1-git-send-email-imre.deak@intel.com> <1433780924-7673-2-git-send-email-imre.deak@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id 4FE166E767 for ; Tue, 9 Jun 2015 01:18:41 -0700 (PDT) In-Reply-To: <1433780924-7673-2-git-send-email-imre.deak@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Imre Deak , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gTW9uLCAwOCBKdW4gMjAxNSwgSW1yZSBEZWFrIDxpbXJlLmRlYWtAaW50ZWwuY29tPiB3cm90 ZToKPiBCeSBydW5uaW5nIGlndC9zdG9yZV9kd29yZF9sb29wX3JlbmRlciBvbiBCWFQgd2UgY2Fu IGhpdCBhIGNvaGVyZW5jeQo+IHByb2JsZW0gd2hlcmUgdGhlIHNlcW5vIHdyaXR0ZW4gYXQgR1BV IGNvbW1hbmQgY29tcGxldGlvbiB0aW1lIGlzIG5vdAo+IHNlZW4gYnkgdGhlIENQVS4gVGhpcyBy ZXN1bHRzIGluIF9faTkxNV93YWl0X3JlcXVlc3Qgc2VlaW5nIHRoZSBzdGFsZQo+IHNlcW5vIGFu ZCBub3QgY29tcGxldGluZyB0aGUgcmVxdWVzdCAobm90IGNvbnNpZGVyaW5nIHRoZSBsb3N0Cj4g aW50ZXJydXB0L0dQVSByZXNldCBtZWNoYW5pc20pLiBJIGFsc28gdmVyaWZpZWQgdGhhdCB0aGlz IGlzbid0IGEgY2FzZQo+IG9mIGEgbG9zdCBpbnRlcnJ1cHQsIG9yIHRoYXQgdGhlIGNvbW1hbmQg ZGlkbid0IGNvbXBsZXRlIHNvbWVob3c6IHdoZW4KPiB0aGUgY29oZXJlbmN5IGlzc3VlIG9jY3Vy ZWQgSSByZWFkIHRoZSBzZXFubyB2aWEgYW4gdW5jYWNoZWQgR1RUIG1hcHBpbmcKPiB0b28uIFdo aWxlIHRoZSBjYWNoZWQgdmVyc2lvbiBvZiB0aGUgc2Vxbm8gc3RpbGwgc2hvd2VkIHRoZSBzdGFs ZSB2YWx1ZQo+IHRoZSBvbmUgcmVhZCB2aWEgdGhlIHVuY2FjaGVkIG1hcHBpbmcgd2FzIHRoZSBj b3JyZWN0IG9uZS4KPgo+IFdvcmsgYXJvdW5kIHRoaXMgaXNzdWUgYnkgY2xmbHVzaGluZyB0aGUg Y29ycmVzcG9uZGluZyBDUFUgY2FjaGVsaW5lCj4gZm9sbG93aW5nIGFueSBzdG9yZSBvZiB0aGUg c2Vxbm8gYW5kIHByZWNlZGluZyBhbnkgcmVhZGluZyBvZiBpdC4gV2hlbgo+IHJlYWRpbmcgaXQg ZG8gdGhpcyBvbmx5IHdoZW4gdGhlIGNhbGxlciBleHBlY3RzIGEgY29oZXJlbnQgdmlldy4KPgo+ IFRlc3RjYXNlOiBpZ3Qvc3RvcmVfZHdvcmRfbG9vcF9yZW5kZXIKPiBTaWduZWQtb2ZmLWJ5OiBJ bXJlIERlYWsgPGltcmUuZGVha0BpbnRlbC5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvZ3B1L2RybS9p OTE1L2ludGVsX2xyYy5jICAgICAgICB8IDE3ICsrKysrKysrKysrKysrKysrCj4gIGRyaXZlcnMv Z3B1L2RybS9pOTE1L2ludGVsX3JpbmdidWZmZXIuaCB8ICA3ICsrKysrKysKPiAgMiBmaWxlcyBj aGFuZ2VkLCAyNCBpbnNlcnRpb25zKCspCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfbHJjLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMuYwo+IGlu ZGV4IDlmNTQ4NWQuLjg4YmM1NTI1IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1 L2ludGVsX2xyYy5jCj4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMKPiBA QCAtMTI4OCwxMiArMTI4OCwyOSBAQCBzdGF0aWMgaW50IGdlbjhfZW1pdF9mbHVzaF9yZW5kZXIo c3RydWN0IGludGVsX3JpbmdidWZmZXIgKnJpbmdidWYsCj4gIAo+ICBzdGF0aWMgdTMyIGdlbjhf Z2V0X3NlcW5vKHN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmcsIGJvb2wgbGF6eV9jb2hlcmVu Y3kpCj4gIHsKPiArCS8qCj4gKwkgKiBPbiBCWFQtQTEgdGhlcmUgaXMgYSBjb2hlcmVuY3kgaXNz dWUgd2hlcmVieSB0aGUgTUlfU1RPUkVfREFUQV9JTU0KPiArCSAqIHN0b3JpbmcgdGhlIGNvbXBs ZXRlZCByZXF1ZXN0J3Mgc2Vxbm8gb2NjYXNpb25hbGx5IGRvZXNuJ3QKPiArCSAqIGludmFsaWRh dGUgdGhlIENQVSBjYWNoZS4gV29yayBhcm91bmQgdGhpcyBieSBjbGZsdXNoaW5nIHRoZQo+ICsJ ICogY29ycmVzcG9uZGluZyBjYWNoZWxpbmUgd2hlbmV2ZXIgdGhlIGNhbGxlciB3YW50cyB0aGUg Y29oZXJlbmN5IHRvCj4gKwkgKiBiZSBndWFyYW50ZWVkLiBOb3RlIHRoYXQgdGhpcyBjYWNoZWxp bmUgaXMga25vd24gdG8gYmUKPiArCSAqIGNsZWFuIGF0IHRoaXMgcG9pbnQsIHNpbmNlIHdlIG9u bHkgd3JpdGUgaXQgaW4gZ2VuOF9zZXRfc2Vxbm8oKSwKPiArCSAqIHdoZXJlIHdlIGFsc28gZG8g YSBjbGZsdXNoIGFmdGVyIHRoZSB3cml0ZS4gU28gdGhpcyBjbGZsdXNoIGluCj4gKwkgKiBwcmFj dGljZSBiZWNvbWVzIGFuIGludmFsaWRhdGUgb3BlcmF0aW9uLgo+ICsJICovCj4gKwlpZiAoSVNf QlJPWFRPTihyaW5nLT5kZXYpICYgIWxhenlfY29oZXJlbmN5KQoKU2hvdWxkIGJlICYmLgoKQlIs CkphbmkuCgo+ICsJCWludGVsX2ZsdXNoX3N0YXR1c19wYWdlKHJpbmcsIEk5MTVfR0VNX0hXU19J TkRFWCk7Cj4gKwo+ICAJcmV0dXJuIGludGVsX3JlYWRfc3RhdHVzX3BhZ2UocmluZywgSTkxNV9H RU1fSFdTX0lOREVYKTsKPiAgfQo+ICAKPiAgc3RhdGljIHZvaWQgZ2VuOF9zZXRfc2Vxbm8oc3Ry dWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywgdTMyIHNlcW5vKQo+ICB7Cj4gIAlpbnRlbF93cml0 ZV9zdGF0dXNfcGFnZShyaW5nLCBJOTE1X0dFTV9IV1NfSU5ERVgsIHNlcW5vKTsKPiArCj4gKwkv KiBTZWUgZ2VuOF9nZXRfc2Vxbm8oKSBleHBsYWluaW5nIHRoZSByZWFzb24gZm9yIHRoZSBjbGZs dXNoLiAqLwo+ICsJaWYgKElTX0JST1hUT04ocmluZy0+ZGV2KSkKPiArCQlpbnRlbF9mbHVzaF9z dGF0dXNfcGFnZShyaW5nLCBJOTE1X0dFTV9IV1NfSU5ERVgpOwo+ICB9Cj4gIAo+ICBzdGF0aWMg aW50IGdlbjhfZW1pdF9yZXF1ZXN0KHN0cnVjdCBpbnRlbF9yaW5nYnVmZmVyICpyaW5nYnVmLAo+ IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmggYi9k cml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmgKPiBpbmRleCAzOWY2ZGZjLi4y MjRhMjViIDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3JpbmdidWZm ZXIuaAo+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX3JpbmdidWZmZXIuaAo+IEBA IC0zNTIsNiArMzUyLDEzIEBAIGludGVsX3Jpbmdfc3luY19pbmRleChzdHJ1Y3QgaW50ZWxfZW5n aW5lX2NzICpyaW5nLAo+ICAJcmV0dXJuIGlkeDsKPiAgfQo+ICAKPiArc3RhdGljIGlubGluZSB2 b2lkCj4gK2ludGVsX2ZsdXNoX3N0YXR1c19wYWdlKHN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJp bmcsIGludCByZWcpCj4gK3sKPiArCWRybV9jbGZsdXNoX3ZpcnRfcmFuZ2UoJnJpbmctPnN0YXR1 c19wYWdlLnBhZ2VfYWRkcltyZWddLAo+ICsJCQkgICAgICAgc2l6ZW9mKHVpbnQzMl90KSk7Cj4g K30KPiArCj4gIHN0YXRpYyBpbmxpbmUgdTMyCj4gIGludGVsX3JlYWRfc3RhdHVzX3BhZ2Uoc3Ry dWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywKPiAgCQkgICAgICAgaW50IHJlZykKPiAtLSAKPiAy LjEuNAo+Cj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K PiBJbnRlbC1nZnggbWFpbGluZyBsaXN0Cj4gSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9y Zwo+IGh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1n ZngKCi0tIApKYW5pIE5pa3VsYSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9neSBDZW50ZXIK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4 IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK