From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: locking&resource refcounting for ttm_bo_kmap/dma_buf_vmap Date: Wed, 20 Nov 2019 13:19:40 +0100 Message-ID: References: <6540938e-b555-82c9-28e5-bbef3741863a@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-oi1-x244.google.com (mail-oi1-x244.google.com [IPv6:2607:f8b0:4864:20::244]) by gabe.freedesktop.org (Postfix) with ESMTPS id A93556E536 for ; Wed, 20 Nov 2019 12:19:52 +0000 (UTC) Received: by mail-oi1-x244.google.com with SMTP id j7so22300305oib.3 for ; Wed, 20 Nov 2019 04:19:52 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: Thomas Hellstrom , Thomas Zimmermann , dri-devel , Gerd Hoffmann List-Id: dri-devel@lists.freedesktop.org T24gV2VkLCBOb3YgMjAsIDIwMTkgYXQgMTowOSBQTSBEYW5pZWwgVmV0dGVyIDxkYW5pZWwudmV0 dGVyQGZmd2xsLmNoPiB3cm90ZToKPiBPbiBXZWQsIE5vdiAyMCwgMjAxOSBhdCAxOjAyIFBNIENo cmlzdGlhbiBLw7ZuaWcKPiA8Y2hyaXN0aWFuLmtvZW5pZ0BhbWQuY29tPiB3cm90ZToKPiA+Cj4g PiA+IFdoYXQgYW0gSSBtaXNzaW5nPwo+ID4gVGhlIGFzc3VtcHRpb24gaXMgdGhhdCB3aGVuIHlv dSB3YW50IHRvIGNyZWF0ZSBhIHZtYXAgb2YgYSBETUEtYnVmCj4gPiBidWZmZXIgdGhlIGJ1ZmZl ciBuZWVkcyB0byBiZSBwaW5uZWQgc29tZWhvdy4KPiA+Cj4gPiBFLmcuIHdpdGhvdXQgZHluYW1p YyBkbWEtYnVmIGhhbmRsaW5nIHlvdSB3b3VsZCBuZWVkIHRvIGhhdmUgYW4gYWN0aXZlCj4gPiBh dHRhY2htZW50LiBXaXRoIGR5bmFtaWMgaGFuZGxpbmcgdGhlIHJlcXVpcmVtZW50cyBjb3VsZCBi ZSBsb3dlcmVkIHRvCj4gPiB1c2luZyB0aGUgcGluKCkvdW5waW4oKSBjYWxsYmFja3MuCj4KPiBZ ZWFoIHJpZ2h0IG5vdyBldmVyeW9uZSBzZWVtcyB0byBoYXZlIGFuIGF0dGFjaG1lbnQsIGFuZCB0 aGF0J3MgaG93IHdlCj4gZ2V0IGF3YXkgd2l0aCBhbGwgdGhpcy4gQnV0IHRoZSBpbnRlcmZhY2Ug aXNuJ3Qgc3VwcG9zZWQgdG8gd29yayBsaWtlCj4gdGhhdCwgZG1hX2J1Zl92bWFwL3VubWFwIGlz IHN1cHBvc2VkIHRvIGJlIGEgc3RhbmQtYWxvbmUgdGhpbmcgKHlvdQo+IGNhbiBjYWxsIGl0IGRp cmVjdGx5IG9uIHRoZSBzdHJ1Y3QgZG1hX2J1Ziwgbm8gbmVlZCBmb3IgYW4KPiBhdHRhY2htZW50 KS4gQWxzbyBJIGRvbid0IHRoaW5rIG5vbi1keW5hbWljIGRyaXZlcnMgc2hvdWxkIGV2ZXIgY2Fs bAo+IHBpbi91bnBpbiwgbm90IHRoZWlyIGpvYiwgaG9sZGluZyBvbnRvIGEgbWFwcGluZyBzaG91 bGQgYmUgZW5vdWdoIHRvCj4gZ2V0IHRoaW5ncyBwaW5uZWQuCj4KPiA+IFlvdSBhbHNvIGNhbid0 IGxvY2svdW5sb2NrIGluc2lkZSB5b3VyIHZtYXAgY2FsbGJhY2sgYmVjYXVzZSB5b3UgZG9uJ3QK PiA+IGhhdmUgYW55IGd1YXJhbnRlZSB0aGF0IHRoZSBwb2ludGVyIHN0YXlzIHZhbGlkIGFzIHNv b24gYXMgeW91ciBkcm9wCj4gPiB5b3VyIGxvY2suCj4KPiBXZWxsIHRoYXQncyB3aHkgSSBhc2tl ZCB3aGVyZSB0aGUgcGluL3VucGluIHBhaXIgaXMuIElmIHlvdSBsb2NrJnBpbiwKPiB0aGVuIHlv dSBkbyBrbm93IHRoYXQgdGhlIHBvaW50ZXIgd2lsbCBzdGF5IGFyb3VuZC4gQnV0IGxvb2tzIGxp a2UgdGhlCj4gb3JpZ2luYWwgcGF0Y2ggZnJvbSBEYXZlIGZvciB0dG0gYmFzZWQgZHJpdmVycyBw bGF5ZWQgZmFzdCZsb29zZSBoZXJlCj4gd2l0aCB3aGF0IHNob3VsZCBiZSBkb25lLgo+Cj4gPiBC VFc6IFdoYXQgaXMgdm1hcCgpIHN0aWxsIHVzZWQgZm9yPwo+Cj4gdWRsLCBidW5jaCBvZiBvdGhl ciB0aGluZ3MgKGUuZy4gYnVuY2ggb2YgdGlueSBkcml2ZXJzKS4gTm90IG11Y2gsIGJ1dAo+IG5v dCBzdHVmZiB3ZSBjYW4gZHJvcC4KCklmIHdlJ3JlIHVubHVja3kgd2UnbGwgYWN0dWFsbHkgaGF2 ZSBhIHByb2JsZW0gd2l0aCB0aGVzZSBub3cuIEZvcgpzb21lIG9mIHRoZXNlIHRoZSBhdHRhY2hl ZCBkZXZpY2UgaXMgbm90IGRtYS1jYXBhYmxlLCBzbyBkbWFfbWFwX3NnCndpbGwgZ28gYm9vbS4g V2l0aCB0aGUgY2FjaGVkIG1hcHBpbmcgbG9naWMgd2Ugbm93IGhhdmUgdGhpcyBtaWdodCBnbwpz aWRld2F5cyBmb3IgZHluYW1pYyBleHBvcnRlcnMuIERpZCB5b3UgdGVzdCB5b3VyIGR5bmFtaWMg ZG1hLWJ1ZgpzdXBwb3J0IGZvciBhbWRncHUgd2l0aCB1ZGw/IFdvcnN0IGNhc2Ugd2UgbmVlZCB0 byBnZXQgcmlkIG9mIHRoZSBmYWtlCmF0dGFjaG1lbnQsIGZpeCB0aGUgdm1hcCBsb2NraW5nL3Bp bm5pbmcsIGFuZCBtYXliZSBzb21lIG1vcmUKaGVhZGFjaGVzIHRvIHNvcnQgdGhpcyBvdXQuCi1E YW5pZWwKCgo+IC1EYW5pZWwKPgo+ID4KPiA+IFJlZ2FyZHMsCj4gPiBDaHJpc3RpYW4uCj4gPgo+ ID4gQW0gMjAuMTEuMTkgdW0gMTI6NDcgc2NocmllYiBEYW5pZWwgVmV0dGVyOgo+ID4gPiBIaSBh bGwsCj4gPiA+Cj4gPiA+IEkndmUgYmVlbiBsb29raW5nIGF0IGRtYV9idWZfdih1biltYXAsIHdp dGggYSBnb2FsIHRvIHN0YW5kYXJkaXplCj4gPiA+IGxvY2tpbmcgZm9yIGF0IGxlYXN0IGR5bmFt aWMgZG1hLWJ1ZiBleHBvcnRlcnMvaW1wb3J0ZXJzLCBtb3N0IGxpa2VseQo+ID4gPiBieSByZXF1 aXJpbmcgZG1hX3Jlc3ZfbG9jay4gQW5kIEkgZ290IHF1ZXN0aW9ucyBhcm91bmQgaG93IHRoaXMg aXMKPiA+ID4gc3VwcG9zZWQgdG8gd29yaywgc2luY2UgYSBiaWcgY2h1bmsgb2YgZHJpdmVycyBz ZWVtIHRvIGVudGlyZWx5IGxhY2sKPiA+ID4gbG9ja2luZyBhcm91bmQgdHRtX2JvX2ttYXAuIFR3 byBiaWcgb25lczoKPiA+ID4KPiA+ID4gLSB0dG1fYm9fa21hcCBsb29rcyBhdCBiby0+bWVtIHRv IGZpZ3VyZSBvdXQgd2hhdC93aGVyZSB0byBrbWFwIHRvIGdldAo+ID4gPiBhdCB0aGF0IGJ1ZmZl ci4gYm8tPm1lbSBpcyBzdXBwb3NlZCB0byBiZSBwcm90ZWN0ZWQgd2l0aAo+ID4gPiBkbWFfcmVz dl9sb2NrLCBidXQgYXQgbGVhc3QgYW1ncHUvbm91dmVhdS9yYWRlb24vcXhsIGRvbid0IGdyYWIg dGhhdAo+ID4gPiBpbiB0aGVpciBwcmltZSB2bWFwIGZ1bmN0aW9uLgo+ID4gPgo+ID4gPiAtIGJl dHdlZW4gdGhlIHZtYXAgYW5kIHZ1bm1hcCBzb21ldGhpbmcgbmVlZHMgdG8gbWFrZSBzdXJlIHRo ZSBiYWNraW5nCj4gPiA+IHN0b3JhZ2UgZG9lc24ndCBtb3ZlIGFyb3VuZC4gSSBkaWRuJ3QgZmlu ZCB0aGF0IGVpdGhlciBhbnl3aGVyZSwKPiA+ID4gdHRtX2JvX2ttYXAgc2ltcGx5IHNlZW1zIHRv IHNldCB1cCB0aGUgbWFwcGluZywgbGVhdmluZyBsb2NraW5nIGFuZAo+ID4gPiByZWZjb3VudGlu ZyB0byBjYWxsZXJzLgo+ID4gPgo+ID4gPiAtIHZyYW0gaGVscGVycyBoYXZlIGF0IGxlYXN0IGxv Y2tpbmcsIGJ1dCBJJ20gc3RpbGwgbWlzc2luZyB0aGUKPiA+ID4gcmVmY291bnRpbmcuIHZtd2dm eCBkb2Vzbid0IGJvdGhlciB3aXRoIHZtYXAuCj4gPiA+Cj4gPiA+IFdoYXQgYW0gSSBtaXNzaW5n Pwo+ID4gPgo+ID4gPiBUaGFua3MsIERhbmllbAo+ID4KPgo+Cj4gLS0KPiBEYW5pZWwgVmV0dGVy Cj4gU29mdHdhcmUgRW5naW5lZXIsIEludGVsIENvcnBvcmF0aW9uCj4gKzQxICgwKSA3OSAzNjUg NTcgNDggLSBodHRwOi8vYmxvZy5mZndsbC5jaAoKCgotLSAKRGFuaWVsIFZldHRlcgpTb2Z0d2Fy ZSBFbmdpbmVlciwgSW50ZWwgQ29ycG9yYXRpb24KKzQxICgwKSA3OSAzNjUgNTcgNDggLSBodHRw Oi8vYmxvZy5mZndsbC5jaApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3Rv cC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmkt ZGV2ZWw=