From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Kuoppala Subject: Re: [PATCH 1/2] drm/i915/bxt: work around HW coherency issue when accessing GPU seqno Date: Wed, 01 Jul 2015 16:53:49 +0300 Message-ID: <87y4j0nfv6.fsf@gaia.fi.intel.com> References: <1433780924-7673-1-git-send-email-imre.deak@intel.com> <1433780924-7673-2-git-send-email-imre.deak@intel.com> <871tgsov22.fsf@gaia.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTP id 589F06E559 for ; Wed, 1 Jul 2015 06:54:05 -0700 (PDT) In-Reply-To: <871tgsov22.fsf@gaia.fi.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 TWlrYSBLdW9wcGFsYSA8bWlrYS5rdW9wcGFsYUBsaW51eC5pbnRlbC5jb20+IHdyaXRlczoKCj4g SW1yZSBEZWFrIDxpbXJlLmRlYWtAaW50ZWwuY29tPiB3cml0ZXM6Cj4KPj4gQnkgcnVubmluZyBp Z3Qvc3RvcmVfZHdvcmRfbG9vcF9yZW5kZXIgb24gQlhUIHdlIGNhbiBoaXQgYSBjb2hlcmVuY3kK Pj4gcHJvYmxlbSB3aGVyZSB0aGUgc2Vxbm8gd3JpdHRlbiBhdCBHUFUgY29tbWFuZCBjb21wbGV0 aW9uIHRpbWUgaXMgbm90Cj4+IHNlZW4gYnkgdGhlIENQVS4gVGhpcyByZXN1bHRzIGluIF9faTkx NV93YWl0X3JlcXVlc3Qgc2VlaW5nIHRoZSBzdGFsZQo+PiBzZXFubyBhbmQgbm90IGNvbXBsZXRp bmcgdGhlIHJlcXVlc3QgKG5vdCBjb25zaWRlcmluZyB0aGUgbG9zdAo+PiBpbnRlcnJ1cHQvR1BV IHJlc2V0IG1lY2hhbmlzbSkuIEkgYWxzbyB2ZXJpZmllZCB0aGF0IHRoaXMgaXNuJ3QgYSBjYXNl Cj4+IG9mIGEgbG9zdCBpbnRlcnJ1cHQsIG9yIHRoYXQgdGhlIGNvbW1hbmQgZGlkbid0IGNvbXBs ZXRlIHNvbWVob3c6IHdoZW4KPj4gdGhlIGNvaGVyZW5jeSBpc3N1ZSBvY2N1cmVkIEkgcmVhZCB0 aGUgc2Vxbm8gdmlhIGFuIHVuY2FjaGVkIEdUVCBtYXBwaW5nCj4+IHRvby4gV2hpbGUgdGhlIGNh Y2hlZCB2ZXJzaW9uIG9mIHRoZSBzZXFubyBzdGlsbCBzaG93ZWQgdGhlIHN0YWxlIHZhbHVlCj4+ IHRoZSBvbmUgcmVhZCB2aWEgdGhlIHVuY2FjaGVkIG1hcHBpbmcgd2FzIHRoZSBjb3JyZWN0IG9u ZS4KPj4KPj4gV29yayBhcm91bmQgdGhpcyBpc3N1ZSBieSBjbGZsdXNoaW5nIHRoZSBjb3JyZXNw b25kaW5nIENQVSBjYWNoZWxpbmUKPj4gZm9sbG93aW5nIGFueSBzdG9yZSBvZiB0aGUgc2Vxbm8g YW5kIHByZWNlZGluZyBhbnkgcmVhZGluZyBvZiBpdC4gV2hlbgo+PiByZWFkaW5nIGl0IGRvIHRo aXMgb25seSB3aGVuIHRoZSBjYWxsZXIgZXhwZWN0cyBhIGNvaGVyZW50IHZpZXcuCj4+Cj4+IFRl c3RjYXNlOiBpZ3Qvc3RvcmVfZHdvcmRfbG9vcF9yZW5kZXIKPj4gU2lnbmVkLW9mZi1ieTogSW1y ZSBEZWFrIDxpbXJlLmRlYWtAaW50ZWwuY29tPgo+PiAtLS0KPj4gIGRyaXZlcnMvZ3B1L2RybS9p OTE1L2ludGVsX2xyYy5jICAgICAgICB8IDE3ICsrKysrKysrKysrKysrKysrCj4+ICBkcml2ZXJz L2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5nYnVmZmVyLmggfCAgNyArKysrKysrCj4+ICAyIGZpbGVz IGNoYW5nZWQsIDI0IGluc2VydGlvbnMoKykKPj4KPj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1 L2RybS9pOTE1L2ludGVsX2xyYy5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfbHJjLmMK Pj4gaW5kZXggOWY1NDg1ZC4uODhiYzU1MjUgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvZ3B1L2Ry bS9pOTE1L2ludGVsX2xyYy5jCj4+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2xy Yy5jCj4+IEBAIC0xMjg4LDEyICsxMjg4LDI5IEBAIHN0YXRpYyBpbnQgZ2VuOF9lbWl0X2ZsdXNo X3JlbmRlcihzdHJ1Y3QgaW50ZWxfcmluZ2J1ZmZlciAqcmluZ2J1ZiwKPj4gIAo+PiAgc3RhdGlj IHUzMiBnZW44X2dldF9zZXFubyhzdHJ1Y3QgaW50ZWxfZW5naW5lX2NzICpyaW5nLCBib29sIGxh enlfY29oZXJlbmN5KQo+PiAgewo+PiArCS8qCj4+ICsJICogT24gQlhULUExIHRoZXJlIGlzIGEg Y29oZXJlbmN5IGlzc3VlIHdoZXJlYnkgdGhlIE1JX1NUT1JFX0RBVEFfSU1NCj4+ICsJICogc3Rv cmluZyB0aGUgY29tcGxldGVkIHJlcXVlc3QncyBzZXFubyBvY2Nhc2lvbmFsbHkgZG9lc24ndAo+ PiArCSAqIGludmFsaWRhdGUgdGhlIENQVSBjYWNoZS4gV29yayBhcm91bmQgdGhpcyBieSBjbGZs dXNoaW5nIHRoZQo+PiArCSAqIGNvcnJlc3BvbmRpbmcgY2FjaGVsaW5lIHdoZW5ldmVyIHRoZSBj YWxsZXIgd2FudHMgdGhlIGNvaGVyZW5jeSB0bwo+PiArCSAqIGJlIGd1YXJhbnRlZWQuIE5vdGUg dGhhdCB0aGlzIGNhY2hlbGluZSBpcyBrbm93biB0byBiZQo+PiArCSAqIGNsZWFuIGF0IHRoaXMg cG9pbnQsIHNpbmNlIHdlIG9ubHkgd3JpdGUgaXQgaW4gZ2VuOF9zZXRfc2Vxbm8oKSwKPj4gKwkg KiB3aGVyZSB3ZSBhbHNvIGRvIGEgY2xmbHVzaCBhZnRlciB0aGUgd3JpdGUuIFNvIHRoaXMgY2xm bHVzaCBpbgo+PiArCSAqIHByYWN0aWNlIGJlY29tZXMgYW4gaW52YWxpZGF0ZSBvcGVyYXRpb24u Cj4+ICsJICovCj4+ICsJaWYgKElTX0JST1hUT04ocmluZy0+ZGV2KSAmICFsYXp5X2NvaGVyZW5j eSkKPgo+IHMvJi8mJiA/CgpzLy9SZWFkIFRoZSBXaG9sZSBUaHJlYWQgQmVmb3JlIFJlcGx5aW5n CgotTWlrYQoKPiAtTWlrYQo+Cj4+ICsJCWludGVsX2ZsdXNoX3N0YXR1c19wYWdlKHJpbmcsIEk5 MTVfR0VNX0hXU19JTkRFWCk7Cj4+ICsKPj4gIAlyZXR1cm4gaW50ZWxfcmVhZF9zdGF0dXNfcGFn ZShyaW5nLCBJOTE1X0dFTV9IV1NfSU5ERVgpOwo+PiAgfQo+PiAgCj4+ICBzdGF0aWMgdm9pZCBn ZW44X3NldF9zZXFubyhzdHJ1Y3QgaW50ZWxfZW5naW5lX2NzICpyaW5nLCB1MzIgc2Vxbm8pCj4+ ICB7Cj4+ICAJaW50ZWxfd3JpdGVfc3RhdHVzX3BhZ2UocmluZywgSTkxNV9HRU1fSFdTX0lOREVY LCBzZXFubyk7Cj4+ICsKPj4gKwkvKiBTZWUgZ2VuOF9nZXRfc2Vxbm8oKSBleHBsYWluaW5nIHRo ZSByZWFzb24gZm9yIHRoZSBjbGZsdXNoLiAqLwo+PiArCWlmIChJU19CUk9YVE9OKHJpbmctPmRl dikpCj4+ICsJCWludGVsX2ZsdXNoX3N0YXR1c19wYWdlKHJpbmcsIEk5MTVfR0VNX0hXU19JTkRF WCk7Cj4+ICB9Cj4+ICAKPj4gIHN0YXRpYyBpbnQgZ2VuOF9lbWl0X3JlcXVlc3Qoc3RydWN0IGlu dGVsX3JpbmdidWZmZXIgKnJpbmdidWYsCj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0v aTkxNS9pbnRlbF9yaW5nYnVmZmVyLmggYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9yaW5n YnVmZmVyLmgKPj4gaW5kZXggMzlmNmRmYy4uMjI0YTI1YiAxMDA2NDQKPj4gLS0tIGEvZHJpdmVy cy9ncHUvZHJtL2k5MTUvaW50ZWxfcmluZ2J1ZmZlci5oCj4+ICsrKyBiL2RyaXZlcnMvZ3B1L2Ry bS9pOTE1L2ludGVsX3JpbmdidWZmZXIuaAo+PiBAQCAtMzUyLDYgKzM1MiwxMyBAQCBpbnRlbF9y aW5nX3N5bmNfaW5kZXgoc3RydWN0IGludGVsX2VuZ2luZV9jcyAqcmluZywKPj4gIAlyZXR1cm4g aWR4Owo+PiAgfQo+PiAgCj4+ICtzdGF0aWMgaW5saW5lIHZvaWQKPj4gK2ludGVsX2ZsdXNoX3N0 YXR1c19wYWdlKHN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmcsIGludCByZWcpCj4+ICt7Cj4+ ICsJZHJtX2NsZmx1c2hfdmlydF9yYW5nZSgmcmluZy0+c3RhdHVzX3BhZ2UucGFnZV9hZGRyW3Jl Z10sCj4+ICsJCQkgICAgICAgc2l6ZW9mKHVpbnQzMl90KSk7Cj4+ICt9Cj4+ICsKPj4gIHN0YXRp YyBpbmxpbmUgdTMyCj4+ICBpbnRlbF9yZWFkX3N0YXR1c19wYWdlKHN0cnVjdCBpbnRlbF9lbmdp bmVfY3MgKnJpbmcsCj4+ICAJCSAgICAgICBpbnQgcmVnKQo+PiAtLSAKPj4gMi4xLjQKPj4KPj4g X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KPj4gSW50ZWwt Z2Z4IG1haWxpbmcgbGlzdAo+PiBJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCj4+IGh0 dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngKPiBf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwo+IEludGVsLWdm eCBtYWlsaW5nIGxpc3QKPiBJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCj4gaHR0cDov L2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeApfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGlu ZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVk ZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=