From mboxrd@z Thu Jan 1 00:00:00 1970 From: John.C.Harrison@Intel.com Subject: [RFC 12/12] drm/i915: Cache last IRQ seqno to reduce IRQ overhead Date: Mon, 23 Nov 2015 11:34:31 +0000 Message-ID: <1448278471-31181-13-git-send-email-John.C.Harrison@Intel.com> References: <1448278471-31181-1-git-send-email-John.C.Harrison@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 A2A81721EF for ; Mon, 23 Nov 2015 03:34:48 -0800 (PST) In-Reply-To: <1448278471-31181-1-git-send-email-John.C.Harrison@Intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Intel-GFX@Lists.FreeDesktop.Org List-Id: intel-gfx@lists.freedesktop.org RnJvbTogSm9obiBIYXJyaXNvbiA8Sm9obi5DLkhhcnJpc29uQEludGVsLmNvbT4KClRoZSBub3Rp ZnkgZnVuY3Rpb24gY2FuIGJlIGNhbGxlZCBtYW55IHRpbWVzIHdpdGhvdXQgdGhlIHNlcW5vCmNo YW5naW5nLiBBIGxhcmdlIG51bWJlciBvZiBkdXBsaWNhdGVzIGFyZSB0byBwcmV2ZW50IHJhY2Vz IGR1ZSB0byB0aGUKcmVxdWlyZW1lbnQgb2Ygbm90IGVuYWJsaW5nIGludGVycnVwdHMgdW50aWwg cmVxdWVzdGVkLiBIb3dldmVyLCB3aGVuCmludGVycnVwdHMgYXJlIGVuYWJsZWQgdGhlIElSUSBo YW5kbGUgY2FuIGJlIGNhbGxlZCBtdWx0aXBsZSB0aW1lcwp3aXRob3V0IHRoZSByaW5nJ3Mgc2Vx bm8gdmFsdWUgY2hhbmdpbmcuIFRoaXMgcGF0Y2ggcmVkdWNlcyB0aGUKb3ZlcmhlYWQgb2YgdGhl c2UgZXh0cmEgY2FsbHMgYnkgY2FjaGluZyB0aGUgbGFzdCBwcm9jZXNzZWQgc2Vxbm8KdmFsdWUg YW5kIGVhcmx5IGV4aXRpbmcgaWYgaXQgaGFzIG5vdCBjaGFuZ2VkLgoKdjM6IE5ldyBwYXRjaCBm b3Igc2VyaWVzLgoKRm9yOiBWSVotNTE5MApTaWduZWQtb2ZmLWJ5OiBKb2huIEhhcnJpc29uIDxK b2huLkMuSGFycmlzb25ASW50ZWwuY29tPgotLS0KIGRyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVf Z2VtLmMgICAgICAgICB8IDE0ICsrKysrKysrKysrLS0tCiBkcml2ZXJzL2dwdS9kcm0vaTkxNS9p bnRlbF9yaW5nYnVmZmVyLmggfCAgMSArCiAyIGZpbGVzIGNoYW5nZWQsIDEyIGluc2VydGlvbnMo KyksIDMgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkx NV9nZW0uYyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2VtLmMKaW5kZXggNWM4NDg2Ni4u MGU0MTM4NiAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9nZW0uYworKysg Yi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2dlbS5jCkBAIC0yNDU3LDYgKzI0NTcsOCBAQCBp OTE1X2dlbV9pbml0X3NlcW5vKHN0cnVjdCBkcm1fZGV2aWNlICpkZXYsIHUzMiBzZXFubykKIAog CQlmb3IgKGogPSAwOyBqIDwgQVJSQVlfU0laRShyaW5nLT5zZW1hcGhvcmUuc3luY19zZXFubyk7 IGorKykKIAkJCXJpbmctPnNlbWFwaG9yZS5zeW5jX3NlcW5vW2pdID0gMDsKKworCQlyaW5nLT5s YXN0X2lycV9zZXFubyA9IDA7CiAJfQogCiAJcmV0dXJuIDA7CkBAIC0yNzg5LDExICsyNzkxLDE0 IEBAIHZvaWQgaTkxNV9nZW1fcmVxdWVzdF9ub3RpZnkoc3RydWN0IGludGVsX2VuZ2luZV9jcyAq cmluZywgYm9vbCBmZW5jZV9sb2NrZWQpCiAJCXJldHVybjsKIAl9CiAKLQlpZiAoIWZlbmNlX2xv Y2tlZCkKLQkJc3Bpbl9sb2NrX2lycXNhdmUoJnJpbmctPmZlbmNlX2xvY2ssIGZsYWdzKTsKLQog CXNlcW5vID0gcmluZy0+Z2V0X3NlcW5vKHJpbmcsIGZhbHNlKTsKIAl0cmFjZV9pOTE1X2dlbV9y ZXF1ZXN0X25vdGlmeShyaW5nLCBzZXFubyk7CisJaWYgKHNlcW5vID09IHJpbmctPmxhc3RfaXJx X3NlcW5vKQorCQlyZXR1cm47CisJcmluZy0+bGFzdF9pcnFfc2Vxbm8gPSBzZXFubzsKKworCWlm ICghZmVuY2VfbG9ja2VkKQorCQlzcGluX2xvY2tfaXJxc2F2ZSgmcmluZy0+ZmVuY2VfbG9jaywg ZmxhZ3MpOwogCiAJbGlzdF9mb3JfZWFjaF9lbnRyeV9zYWZlKHJlcSwgcmVxX25leHQsICZyaW5n LT5mZW5jZV9zaWduYWxfbGlzdCwgc2lnbmFsX2xpbmspIHsKIAkJaWYgKCFyZXEtPmNhbmNlbGxl ZCkgewpAQCAtMzE2Miw3ICszMTY3LDEwIEBAIHN0YXRpYyB2b2lkIGk5MTVfZ2VtX3Jlc2V0X3Jp bmdfY2xlYW51cChzdHJ1Y3QgZHJtX2k5MTVfcHJpdmF0ZSAqZGV2X3ByaXYsCiAJICogVGlkeSB1 cCBhbnl0aGluZyBsZWZ0IG92ZXIuIFRoaXMgaW5jbHVkZXMgYSBjYWxsIHRvCiAJICogaTkxNV9n ZW1fcmVxdWVzdF9ub3RpZnkoKSB3aGljaCB3aWxsIG1ha2Ugc3VyZSB0aGF0IGFueSByZXF1ZXN0 cwogCSAqIHRoYXQgd2VyZSBvbiB0aGUgc2lnbmFsIHBlbmRpbmcgbGlzdCBnZXQgYWxzbyBjbGVh bmVkIHVwLgorCSAqIE5COiBUaGUgc2Vxbm8gY2FjaGUgbXVzdCBiZSBjbGVhcmVkIG90aGVyd2lz ZSB0aGUgbm90aWZ5IGNhbGwgd2lsbAorCSAqIHNpbXBseSByZXR1cm4gaW1tZWRpYXRlbHkuCiAJ ICovCisJcmluZy0+bGFzdF9pcnFfc2Vxbm8gPSAwOwogCWk5MTVfZ2VtX3JldGlyZV9yZXF1ZXN0 c19yaW5nKHJpbmcpOwogCiAJLyogSGF2aW5nIGZsdXNoZWQgYWxsIHJlcXVlc3RzIGZyb20gYWxs IHF1ZXVlcywgd2Uga25vdyB0aGF0IGFsbApkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5 MTUvaW50ZWxfcmluZ2J1ZmZlci5oIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfcmluZ2J1 ZmZlci5oCmluZGV4IDlkMDllZGIuLjE5ODdhYmQgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvZ3B1L2Ry bS9pOTE1L2ludGVsX3JpbmdidWZmZXIuaAorKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRl bF9yaW5nYnVmZmVyLmgKQEAgLTM1Niw2ICszNTYsNyBAQCBzdHJ1Y3QgIGludGVsX2VuZ2luZV9j cyB7CiAJc3BpbmxvY2tfdCBmZW5jZV9sb2NrOwogCXN0cnVjdCBsaXN0X2hlYWQgZmVuY2Vfc2ln bmFsX2xpc3Q7CiAJc3RydWN0IGxpc3RfaGVhZCBmZW5jZV91bnNpZ25hbF9saXN0OworCXVpbnQz Ml90IGxhc3RfaXJxX3NlcW5vOwogfTsKIAogYm9vbCBpbnRlbF9yaW5nX2luaXRpYWxpemVkKHN0 cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmcpOwotLSAKMS45LjEKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50 ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3Jn L21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==