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Tue, 31 Aug 2021 11:31:22 +0800 Message-ID: Subject: Re: [PATCH v12 2/6] PCI: mediatek: Add new method to get shared pcie-cfg base address From: Chuanjia Liu To: Bjorn Helgaas CC: , , , , , , , , , , , Date: Tue, 31 Aug 2021 11:31:24 +0800 In-Reply-To: <20210830214317.GA27606@bjorn-Precision-5520> References: <20210830214317.GA27606@bjorn-Precision-5520> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gTW9uLCAyMDIxLTA4LTMwIGF0IDE2OjQzIC0wNTAwLCBCam9ybiBIZWxnYWFzIHdyb3RlOg0K PiBPbiBNb24sIEF1ZyAzMCwgMjAyMSBhdCAwMzowOTo0NFBNICswODAwLCBDaHVhbmppYSBMaXUg d3JvdGU6DQo+ID4gT24gRnJpLCAyMDIxLTA4LTI3IGF0IDExOjQ2IC0wNTAwLCBCam9ybiBIZWxn YWFzIHdyb3RlOg0KPiA+ID4gT24gTW9uLCBBdWcgMjMsIDIwMjEgYXQgMTE6Mjc6NTZBTSArMDgw MCwgQ2h1YW5qaWEgTGl1IHdyb3RlOg0KPiA+ID4gPiBAQCAtOTk1LDYgKzEwMDQsMTQgQEAgc3Rh dGljIGludCBtdGtfcGNpZV9zdWJzeXNfcG93ZXJ1cChzdHJ1Y3QNCj4gPiA+ID4gbXRrX3BjaWUg KnBjaWUpDQo+ID4gPiA+ICAJCQlyZXR1cm4gUFRSX0VSUihwY2llLT5iYXNlKTsNCj4gPiA+ID4g IAl9DQo+ID4gPiA+ICANCj4gPiA+ID4gKwljZmdfbm9kZSA9IG9mX2ZpbmRfY29tcGF0aWJsZV9u b2RlKE5VTEwsIE5VTEwsDQo+ID4gPiA+ICsJCQkJCSAgICJtZWRpYXRlayxnZW5lcmljLQ0KPiA+ ID4gPiBwY2llY2ZnIik7DQo+ID4gPiA+ICsJaWYgKGNmZ19ub2RlKSB7DQo+ID4gPiA+ICsJCXBj aWUtPmNmZyA9IHN5c2Nvbl9ub2RlX3RvX3JlZ21hcChjZmdfbm9kZSk7DQo+ID4gPiANCj4gPiA+ IE90aGVyIGRyaXZlcnMgaW4gZHJpdmVycy9wY2kvY29udHJvbGxlci8gdXNlDQo+ID4gPiBzeXNj b25fcmVnbWFwX2xvb2t1cF9ieV9waGFuZGxlKCkgKGo3MjFlLCBkcmE3eHgsIGtleXN0b25lLA0K PiA+ID4gbGF5ZXJzY2FwZSwgYXJ0cGVjNikgb3Igc3lzY29uX3JlZ21hcF9sb29rdXBfYnlfY29t cGF0aWJsZSgpDQo+ID4gPiAoaW14NiwNCj4gPiA+IGtpcmluLCB2My1zZW1pKS4NCj4gPiA+IA0K PiA+ID4gWW91IHNob3VsZCBkbyBpdCB0aGUgc2FtZSB3YXkgdW5sZXNzIHRoZXJlJ3MgYSBuZWVk IHRvIGJlDQo+ID4gPiBkaWZmZXJlbnQuDQo+ID4gDQo+ID4gSSBoYXZlIHVzZWQgcGhhbmRsZSwg YnV0IFJvYiBzdWdnZXN0ZWQgdG8gc2VhcmNoIGZvciB0aGUgbm9kZSBieSANCj4gPiBjb21wYXRp YmxlLg0KPiA+IFRoZSByZWFzb24gd2h5IHN5c2Nvbl9yZWdtYXBfbG9va3VwX2J5X2NvbXBhdGli bGUoKSBpcyBub3QgDQo+ID4gdXNlZCBoZXJlIGlzIHRoYXQgdGhlIHBjaWVjZmcgbm9kZSBpcyBv cHRpb25hbCwgYW5kIHRoZXJlIGlzIG5vDQo+ID4gbmVlZCB0bw0KPiA+IHJldHVybiBlcnJvciB3 aGVuIHRoZSBub2RlIGlzIG5vdCBzZWFyY2hlZC4NCj4gDQo+IEhvdyBhYm91dCB0aGlzPw0KPiAN Cj4gICByZWdtYXAgPSBzeXNjb25fcmVnbWFwX2xvb2t1cF9ieV9jb21wYXRpYmxlKCJtZWRpYXRl ayxnZW5lcmljLQ0KPiBwY2llY2ZnIik7DQo+ICAgaWYgKCFJU19FUlIocmVnbWFwKSkNCj4gICAg IHBjaWUtPmNmZyA9IHJlZ21hcDsNCg0KSGkgQmpvcm4sDQoNCldlIG5lZWQgdG8gZGVhbCB3aXRo IHRocmVlIHNpdHVhdGlvbnMNCjEpIE5vIGVycm9yDQoyKSBUaGUgZXJyb3Igb2YgdGhlIG5vZGUg bm90IGZvdW5kLCBkb24ndCBkbyBhbnl0aGluZyANCjMpIE90aGVyIGVycm9ycywgcmV0dXJuIGVy cm9ycw0KDQpJIGd1ZXNzIHlvdSBtZWFuDQoNCnJlZ21hcCA9IHN5c2Nvbl9yZWdtYXBfbG9va3Vw X2J5X2NvbXBhdGlibGUoIm1lZGlhdGVrLGdlbmVyaWMtDQpwY2llY2ZnIik7DQogIGlmICghSVNf RVJSKHJlZ21hcCkpDQogICAgICBwY2llLT5jZmcgPSByZWdtYXA7DQogIGVsc2UgaWYgKElTX0VS UihyZWdtYXApICYmIFBUUl9FUlIocmVnbWFwKSAhPSAtRU5PREVWKQ0KICAgICAgcmV0dXJuIFBU Ul9FUlIocmVnbWFwKTsNCg0KSSdtIG5vdCBzdXJlIGlmIHdlIG5lZWQgdGhpcywgaXQgc2VlbXMg YSBsaXR0bGUgd2VpcmQgYW5kIHRoZXJlIGFyZQ0KbWFueSBkcml2ZXJzIGluIG90aGVyIHN1YnN5 c3RlbXMgdGhhdCB1c2Ugc3lzY29uX25vZGVfdG9fcmVnbWFwKCkuDQoNClRoYW5rcw0KQ2h1YW5q aWENCg==