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Sat, 27 Mar 2021 19:44:42 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lQErN-005SpN-FB; Sat, 27 Mar 2021 19:44:39 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0C6D86198D; Sat, 27 Mar 2021 19:44:34 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1lQErH-004BIN-UC; Sat, 27 Mar 2021 19:44:32 +0000 Date: Sat, 27 Mar 2021 19:44:30 +0000 Message-ID: <87o8f4fkkh.wl-maz@kernel.org> From: Marc Zyngier To: Pali =?UTF-8?B?Um9ow6Fy?= Cc: Jianjun Wang , Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , Ryder Lee , Philipp Zabel , Matthias Brugger , linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, youlin.pei@mediatek.com, chuanjia.liu@mediatek.com, qizhong.cheng@mediatek.com, sin_jieyang@mediatek.com, drinkcat@chromium.org, Rex-BC.Chen@mediatek.com, anson.chuang@mediatek.com, Krzysztof Wilczyski Subject: Re: [v9,5/7] PCI: mediatek-gen3: Add MSI support In-Reply-To: <20210327192837.4rr46oeiuokritlc@pali> References: <20210324030510.29177-1-jianjun.wang@mediatek.com> <20210324030510.29177-6-jianjun.wang@mediatek.com> <20210327192837.4rr46oeiuokritlc@pali> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: pali@kernel.org, jianjun.wang@mediatek.com, bhelgaas@google.com, robh+dt@kernel.org, lorenzo.pieralisi@arm.com, ryder.lee@mediatek.com, p.zabel@pengutronix.de, matthias.bgg@gmail.com, linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, youlin.pei@mediatek.com, chuanjia.liu@mediatek.com, qizhong.cheng@mediatek.com, sin_jieyang@mediatek.com, drinkcat@chromium.org, Rex-BC.Chen@mediatek.com, anson.chuang@mediatek.com, kw@linux.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210327_194437_895459_35ACE932 X-CRM114-Status: GOOD ( 26.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gU2F0LCAyNyBNYXIgMjAyMSAxOToyODozNyArMDAwMCwKUGFsaSBSb2jDoXIgPHBhbGlAa2Vy bmVsLm9yZz4gd3JvdGU6Cj4gCj4gT24gV2VkbmVzZGF5IDI0IE1hcmNoIDIwMjEgMTE6MDU6MDgg Smlhbmp1biBXYW5nIHdyb3RlOgo+ID4gK3N0YXRpYyB2b2lkIG10a19wY2llX21zaV9oYW5kbGVy KHN0cnVjdCBtdGtfcGNpZV9wb3J0ICpwb3J0LCBpbnQgc2V0X2lkeCkKPiA+ICt7Cj4gPiArCXN0 cnVjdCBtdGtfbXNpX3NldCAqbXNpX3NldCA9ICZwb3J0LT5tc2lfc2V0c1tzZXRfaWR4XTsKPiA+ ICsJdW5zaWduZWQgbG9uZyBtc2lfZW5hYmxlLCBtc2lfc3RhdHVzOwo+ID4gKwl1bnNpZ25lZCBp bnQgdmlycTsKPiA+ICsJaXJxX2h3X251bWJlcl90IGJpdCwgaHdpcnE7Cj4gPiArCj4gPiArCW1z aV9lbmFibGUgPSByZWFkbF9yZWxheGVkKG1zaV9zZXQtPmJhc2UgKyBQQ0lFX01TSV9TRVRfRU5B QkxFX09GRlNFVCk7Cj4gPiArCj4gPiArCWRvIHsKPiA+ICsJCW1zaV9zdGF0dXMgPSByZWFkbF9y ZWxheGVkKG1zaV9zZXQtPmJhc2UgKwo+ID4gKwkJCQkJICAgUENJRV9NU0lfU0VUX1NUQVRVU19P RkZTRVQpOwo+ID4gKwkJbXNpX3N0YXR1cyAmPSBtc2lfZW5hYmxlOwo+ID4gKwkJaWYgKCFtc2lf c3RhdHVzKQo+ID4gKwkJCWJyZWFrOwo+ID4gKwo+ID4gKwkJZm9yX2VhY2hfc2V0X2JpdChiaXQs ICZtc2lfc3RhdHVzLCBQQ0lFX01TSV9JUlFTX1BFUl9TRVQpIHsKPiA+ICsJCQlod2lycSA9IGJp dCArIHNldF9pZHggKiBQQ0lFX01TSV9JUlFTX1BFUl9TRVQ7Cj4gPiArCQkJdmlycSA9IGlycV9m aW5kX21hcHBpbmcocG9ydC0+bXNpX2JvdHRvbV9kb21haW4sIGh3aXJxKTsKPiA+ICsJCQlnZW5l cmljX2hhbmRsZV9pcnEodmlycSk7Cj4gPiArCQl9Cj4gPiArCX0gd2hpbGUgKHRydWUpOwo+IAo+ IEhlbGxvIQo+IAo+IEp1c3QgYSBxdWVzdGlvbiwgY2Fubm90IHRoaXMgd2hpbGUtbG9vcCBjYXVz ZSBibG9jayBvZiBwcm9jZXNzaW5nIG90aGVyCj4gaW50ZXJydXB0cz8KClRoaXMgaXMgYSBsZXZl bCBpbnRlcnJ1cHQuIFlvdSBkb24ndCBoYXZlIG11Y2ggY2hvaWNlIGJ1dCB0byBoYW5kbGUgaXQK aW1tZWRpYXRlbHksIGFsdGhvdWdoIGFuIGFsdGVybmF0aXZlIHdvdWxkIGJlIHRvIG1hc2sgaXQg YW5kIGRlYWwgd2l0aAppdCBpbiBhIHRocmVhZC4gQW5kIHNpbmNlIExpbnV4IGRvZXNuJ3QgZGVh bCB3aXRoIGludGVycnVwdCBwcmlvcml0eSwKYSBzY3JlYW1pbmcgaW50ZXJydXB0IGlzIG5ldmVy IGEgZ29vZCB0aGluZy4KCj4gSSBoYXZlIGRvbmUgdGVzdHMgd2l0aCBkaWZmZXJlbnQgSFcgKGFh cmR2YXJrKSBidXQgd2l0aCBzYW1lIHdoaWxlKHRydWUpCj4gbG9vcCBsb2dpYy4gT25lIFhIQ0kg UENJZSBjb250cm9sbGVyIHdhcyBzZW5kaW5nIE1TSSBpbnRlcnJ1cHRzIHRvbyBmYXN0Cj4gYW5k IGludGVycnVwdCBoYW5kbGVyIHdpdGggdGhpcyB3aGlsZSh0cnVlKSBsb2dpYyB3YXMgaW4gaW5m aW5pdGUgbG9vcC4KPiBEdXJpbmcgb25lIElSUSBpdCB3YXMgY2FsbGluZyBpbmZpbml0ZSBtYW55 IHRpbWVzIGdlbmVyaWNfaGFuZGxlX2lycSgpCj4gYXMgSFcgd2FzIGZlZWRpbmcgbmV3IGFuZCBu ZXcgTVNJIGh3aXJxIGludG8gc3RhdHVzIHJlZ2lzdGVyLgoKRGVmaW5lICJ0b28gZmFzdCIuIElm IHNvbWV0aGluZyBpbiB0aGUgc3lzdGVtIGlzIGFibGUgdG8gcHJvZ3JhbSB0aGUKWEhDSSBkZXZp Y2UgaW4gc3VjaCBhIHdheSB0aGF0IGl0IGNhdXNlcyBhIHNjcmVhbWluZyBpbnRlcnJ1cHQsIHRo YXQncwp0aGUgcGxhY2UgdG8gbG9vayBmb3IgcHJvYmxlbXMsIGFuZCBwcm9iYWJseSBub3QgaW4g dGhlIGludGVycnVwdApoYW5kbGluZyBpdHNlbGYsIHdoaWNoIGRvZXMgd2hhdCBpdCBpcyBzdXBw b3NlZCB0byBkby4KCj4gQnV0IHRoaXMgaXMgZGlmZmVyZW50IEhXLCBzbyBpdCBjYW4gaGF2ZSBk aWZmZXJlbnQgYmVoYXZpb3IgYW5kIGRvZXMgbm90Cj4gaGF2ZSB0byBjYXVzZSBhYm92ZSBpc3N1 ZS4KPiAKPiBJIGhhdmUganVzdCBzcG90dGVkIHNhbWUgY29kZSBwYXR0ZXJuIGZvciBwcm9jZXNz aW5nIE1TSSBpbnRlcnJ1cHRzLi4uCgpUaGlzIGlzIGEgY29tbW9uIHBhdHRlcm4gdGhhdCB5b3Ug d2lsbCBmaW5kIGluIHByZXR0eSBtdWNoIGFueQppbnRlcnJ1cHQgaGFuZGxpbmcvZGVtdXhpbmcs IGFuZCBpcyBkb25lIHRoaXMgd2F5IHdoZW4gdGhlIGNvc3Qgb2YKdGFraW5nIHRoZSBleGNlcHRp b24gaXMgaGlnaCBjb21wYXJlZCB0byB0aGF0IG9mIGhhbmRsaW5nIGl0LgoKV2hpY2ggaXMgcHJl dHR5IG11Y2ggYW55IG9mIHRoZSBiYWRseSBkZXNpZ25lZCwgbGV2ZWwtZHJpdmluZywKRFctaW5z cGlyZWQsIHNvcnJ5IGV4Y3VzZSBmb3IgTVNJIGltcGxlbWVudGF0aW9ucyB0aGF0IGFyZSBwb3B1 bGFyIG9uCmxvdy1lbmQgQVJNIFNvQ3MuCgpUaGFua3MsCgoJTS4KCi0tIApXaXRob3V0IGRldmlh dGlvbiBmcm9tIHRoZSBub3JtLCBwcm9ncmVzcyBpcyBub3QgcG9zc2libGUuCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1h aWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xp c3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==