From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [RFC] drm/i915: check that rpm ref is held when writing to ringbuf in stolen mem Date: Wed, 27 Jan 2016 17:06:02 +0100 Message-ID: <20160127160602.GN11240@phenom.ffwll.local> References: <1453884940-30334-1-git-send-email-daniele.ceraolospurio@intel.com> <20160127093826.GW8281@nuc-i3427.alporthouse.com> <56A8C292.1070305@intel.com> <20160127135017.GY8281@nuc-i3427.alporthouse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wm0-f41.google.com (mail-wm0-f41.google.com [74.125.82.41]) by gabe.freedesktop.org (Postfix) with ESMTPS id 02CD36E6D7 for ; Wed, 27 Jan 2016 08:05:54 -0800 (PST) Received: by mail-wm0-f41.google.com with SMTP id p63so33635381wmp.1 for ; Wed, 27 Jan 2016 08:05:53 -0800 (PST) Content-Disposition: inline In-Reply-To: <20160127135017.GY8281@nuc-i3427.alporthouse.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , Daniele Ceraolo Spurio , intel-gfx@lists.freedesktop.org, John Harrison List-Id: intel-gfx@lists.freedesktop.org T24gV2VkLCBKYW4gMjcsIDIwMTYgYXQgMDE6NTA6MTdQTSArMDAwMCwgQ2hyaXMgV2lsc29uIHdy b3RlOgo+IE9uIFdlZCwgSmFuIDI3LCAyMDE2IGF0IDAxOjEzOjU0UE0gKzAwMDAsIERhbmllbGUg Q2VyYW9sbyBTcHVyaW8gd3JvdGU6Cj4gPiAKPiA+IAo+ID4gT24gMjcvMDEvMTYgMDk6MzgsIENo cmlzIFdpbHNvbiB3cm90ZToKPiA+ID5PbiBXZWQsIEphbiAyNywgMjAxNiBhdCAwODo1NTo0MEFN ICswMDAwLCBkYW5pZWxlLmNlcmFvbG9zcHVyaW9AaW50ZWwuY29tIHdyb3RlOgo+ID4gPj5Gcm9t OiBEYW5pZWxlIENlcmFvbG8gU3B1cmlvIDxkYW5pZWxlLmNlcmFvbG9zcHVyaW9AaW50ZWwuY29t Pgo+ID4gPj4KPiA+ID4+V2hpbGUgcnVubmluZyBzb21lIHRlc3RzIG9uIHRoZSBzY2hlZHVsZXIg cGF0Y2hlcyB3aXRoIHJwbSBlbmFibGVkIEkKPiA+ID4+Y2FtZSBhY3Jvc3MgYSBjb3JydXB0aW9u IGluIHRoZSByaW5nYnVmZmVyLCB3aGljaCB3YXMgcm9vdC1jYXVzZWQgdG8KPiA+ID4+dGhlIEdQ VSBiZWluZyBzdXNwZW5kZWQgd2hpbGUgY29tbWFuZHMgd2VyZSBiZWluZyBlbWl0dGVkIHRvIHRo ZQo+ID4gPj5yaW5nYnVmZmVyLiBUaGUgYWNjZXNzIHRvIG1lbW9yeSB3YXMgZmFpbGluZyBiZWNh dXNlIHRoZSBHUFUgbmVlZHMgdG8KPiA+ID4+YmUgYXdha2Ugd2hlbiBhY2Nlc3Npbmcgc3RvbGVu IG1lbW9yeSAod2hlcmUgbXkgcmluZ2J1ZmZlciB3YXMgbG9jYXRlZCkuCj4gPiA+PlNpbmNlIHdl IGhhdmUgdGhpcyBjb25zdHJhaW50IGl0IGxvb2tzIGxpa2UgYSBzZW5zaWJsZSBpZGVhIHRvIGNo ZWNrIHRoYXQKPiA+ID4+d2UgaG9sZCBhIHJlZmNvdW50IHdoZW4gd2UgZW1pdCBjb21tYW5kcy4K PiA+ID4+Cj4gPiA+PkNjOiBKb2huIEhhcnJpc29uIDxKb2huLkMuSGFycmlzb25ASW50ZWwuY29t Pgo+ID4gPj5TaWduZWQtb2ZmLWJ5OiBEYW5pZWxlIENlcmFvbG8gU3B1cmlvIDxkYW5pZWxlLmNl cmFvbG9zcHVyaW9AaW50ZWwuY29tPgo+ID4gPj4tLS0KPiA+ID4+ICBkcml2ZXJzL2dwdS9kcm0v aTkxNS9pbnRlbF9scmMuYyB8IDUgKysrKysKPiA+ID4+ICAxIGZpbGUgY2hhbmdlZCwgNSBpbnNl cnRpb25zKCspCj4gPiA+Pgo+ID4gPj5kaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUv aW50ZWxfbHJjLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMuYwo+ID4gPj5pbmRl eCAzNzYxZWFmLi5mOWU4ZDc0IDEwMDY0NAo+ID4gPj4tLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkx NS9pbnRlbF9scmMuYwo+ID4gPj4rKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9scmMu Ywo+ID4gPj5AQCAtMTEwNSw2ICsxMTA1LDExIEBAIGludCBpbnRlbF9sb2dpY2FsX3JpbmdfYmVn aW4oc3RydWN0IGRybV9pOTE1X2dlbV9yZXF1ZXN0ICpyZXEsIGludCBudW1fZHdvcmRzKQo+ID4g Pj4gIAlpZiAocmV0KQo+ID4gPj4gIAkJcmV0dXJuIHJldDsKPiA+ID4+KwkvLyBJZiB0aGUgcmlu Z2J1ZmZlciBpcyBpbiBzdG9sZW4gbWVtb3J5IHdlIG5lZWQgdG8gYmUgc3VyZSB0aGF0IHRoZQo+ ID4gPj4rCS8vIGdwdSBpcyBhd2FrZSBiZWZvcmUgd3JpdGluZyB0byBpdAo+ID4gPj4rCWlmIChy ZXEtPnJpbmdidWYtPm9iai0+c3RvbGVuICYmIG51bV9kd29yZHMgPiAwKQo+ID4gPj4rCQlhc3Nl cnRfcnBtX3dha2Vsb2NrX2hlbGQoZGV2X3ByaXYpOwo+ID4gPlRoZSBhc3NlcnRpb24geW91IHdh bnQgaXMgdGhhdCB3aGVuIGlvbWFwcGluZyB0aHJvdWdoIHRoZSBHVFQgdGhhdCB3ZQo+ID4gPmhv bGQgYSB3YWtlcmVmLgo+ID4gPi1DaHJpcwo+ID4gCj4gPiBJZiBJJ20gbm90IG1pc3NpbmcgYW55 dGhpbmcsIHdlIGlvbWFwIHRoZSByaW5nYnVmZmVyIGF0IHJlcXVlc3QKPiA+IGFsbG9jYXRpb24g dGltZTsKPiAKPiBTdHJpY3RseSwgdGhlIHJpbmcgaXMgcGlubmVkIGZvciB3aGlsc3Qgd2UgYWNj ZXNzIGl0IGZvciB3cml0aW5nIHRoZQo+IHJlcXVlc3QgaS5lLiBvbmx5IGR1cmluZyByZXF1ZXN0 IGNvbnN0dWN0aW9uLiBJdCBjYW4gYmUgdW5waW5uZWQgYXQgYW55Cj4gcG9pbnQgYWZ0ZXJ3YXJk cy4gSXQgaXMgdW5waW5uZWQgbGF0ZSB0b2RheSB0byBwYXBlciBvdmVyIGEgZmV3IG90aGVyCj4g aXNzdWVzIHdpdGggY29udGV4dCBwaW5uaW5nIGFuZCB0aGUgb3ZlcmhlYWQgb2YgaGF2aW5nIHRv IGRvIHRoZSBpb21hcC4KPiAKPiA+IGhvd2V2ZXIsIHdpdGggdGhlIHNjaGVkdWxlciBhIHJlcXVl c3QgY291bGQKPiA+IHBvdGVudGlhbGx5IHdhaXQgaW4gdGhlIHF1ZXVlIGZvciBhIHRpbWUgbG9u ZyBlbm91Z2ggdG8gYWxsb3cgUlBNIHRvCj4gPiBraWNrIGluLCBlc3BlY2lhbGx5IGlmIHRoZSBy ZXF1ZXN0IGlzIHdhaXRpbmcgb24gYSBmZW5jZSBvYmplY3QKPiA+IGNvbWluZyBmcm9tIGEgZGlm ZmVyZW50IGRyaXZlci4gSW4gdGhpcyBzaXR1YXRpb24gdGhlIHJwbSByZWZlcmVuY2UKPiA+IHRh a2VuIHRvIGNvdmVyIHRoZSByZXF1ZXN0IGFsbG9jYXRpb24gd291bGQgaGF2ZSBhbHJlYWR5IGJl ZW4KPiA+IHJlbGVhc2VkIGFuZCBzbyB3ZSBuZWVkIHRvIGVuc3VyZSB0aGF0IGEgbmV3IG9uZSBo YXMgYmVlbiB0YWtlbgo+ID4gYmVmb3JlIHdyaXRpbmcgdG8gdGhlIHJpbmdidWZmZXI7IHRoYXQn cyB3aHkgSSBvcmlnaW5hbGx5IHBsYWNlZCB0aGUKPiA+IGFzc2VydCBpbiByaW5nX2JlZ2luLgo+ IAo+IE5vLCBvbmNlIHRoZSByZXF1ZXN0IGlzIHF1ZXVlZCB3ZSBhcmUgbm90IG1vZGlmeWluZyB0 aGUgcmluZy4gSWYgdGhlCj4gc2NoZWR1bGVyIG5lZWRzIHRvIG1hbmlwdWxhdGUgaXQgKHdoaWNo IGl0IHNob3VsZG4ndCkgdGhlbiBpdCBoYXMgdG8KPiBhY3F1aXJlIGl0cyBvd24gcGluIGZvciBp dHMgYWNjZXNzIChvciBleHRlbmQgdGhlIG9yaWdpbmFsIHBpbm5pbmcgdG8KPiBzdWl0IHdoaWNo IHdvdWxkIGFsc28gYmUgbGVzcyB0aGFuIGlkZWFsKS4KClllYWgsIHdpdGggZXhlY2xpc3QgYWxs IHRoZSBzY2hlZHVsaW5nIHNob3VsZCBoYXBwZW4gYXQgdGhlIGNvbnRleHQgbGV2ZWwuCldlbGws IGFsbCB0aGUgc2NoZWR1bGluZyBzaG91bGQgYWx3YXlzIGhhcHBlbiBhdCB0aGUgY29udGV4dCBs ZXZlbCwgYnV0CndpdGggZXhlY2xpc3QgdGhlIGh3IG1ha2VzIGl0IG11Y2ggc21vb3RoZXIuIFNj aGVkdWxlciB0b3VjaGluZyB0aGUgcmluZ3MKaW4gdGhlIGN0eCBvYmplY3Qgc291bmRzIGxpa2Ug YSBidWcuCi1EYW5pZWwKLS0gCkRhbmllbCBWZXR0ZXIKU29mdHdhcmUgRW5naW5lZXIsIEludGVs IENvcnBvcmF0aW9uCmh0dHA6Ly9ibG9nLmZmd2xsLmNoCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4 QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxt YW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==