From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Subject: Re: [RFC] Host1x/TegraDRM UAPI Date: Thu, 25 Jun 2020 02:18:47 +0300 Message-ID: References: <9b06b7ec-f952-2561-7afb-5653514cd5d3@kapsi.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <9b06b7ec-f952-2561-7afb-5653514cd5d3-/1wQRMveznE@public.gmane.org> Content-Language: en-US Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mikko Perttunen , Thierry Reding , Jon Hunter , David Airlie , Daniel Vetter , sumit.semwal-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, gustavo-THi1TnShQwVAfugRpC6u6w@public.gmane.org Cc: "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , dri-devel , talho-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, bhuntsman-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org List-Id: linux-tegra@vger.kernel.org 23.06.2020 15:09, Mikko Perttunen пишет: > struct drm_tegra_channel_submit { >         __u32 channel_id; >         __u32 flags; > >         /** >          * [in] Timeout in microseconds after which the kernel may >          *   consider the job to have hung and may reap it and >          *   fast-forward its syncpoint increments. >          * >          *   The value may be capped by the kernel. >          */ >         __u32 timeout; > >         __u32 num_syncpt_incrs; >         __u32 num_relocations; >         __u32 num_commands; > >         __u64 syncpt_incrs; >         __u64 relocations; >         __u64 commands; Do we really need to retain the multi-gather support? The code-bloat (both userspace and kernel driver) is very significant just for preparing and patching of the multi-buffer cmdstreams. If userspace runs out of a free space within the pushbuffer, then it should simply reallocate a larger pushbuffer. I'm suggesting that we should have a single gather per-job, any objections? 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[79.139.237.54]) by smtp.googlemail.com with ESMTPSA id d6sm1640894lja.77.2020.06.24.16.18.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jun 2020 16:18:47 -0700 (PDT) Subject: Re: [RFC] Host1x/TegraDRM UAPI To: Mikko Perttunen , Thierry Reding , Jon Hunter , David Airlie , Daniel Vetter , sumit.semwal@linaro.org, gustavo@padovan.org References: <9b06b7ec-f952-2561-7afb-5653514cd5d3@kapsi.fi> From: Dmitry Osipenko Message-ID: Date: Thu, 25 Jun 2020 02:18:47 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <9b06b7ec-f952-2561-7afb-5653514cd5d3@kapsi.fi> Content-Language: en-US X-Mailman-Approved-At: Thu, 25 Jun 2020 07:31:01 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-tegra@vger.kernel.org" , talho@nvidia.com, bhuntsman@nvidia.com, dri-devel Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" MjMuMDYuMjAyMCAxNTowOSwgTWlra28gUGVydHR1bmVuINC/0LjRiNC10YI6Cj4gc3RydWN0IGRy bV90ZWdyYV9jaGFubmVsX3N1Ym1pdCB7Cj4gwqDCoMKgwqDCoMKgwqAgX191MzIgY2hhbm5lbF9p ZDsKPiDCoMKgwqDCoMKgwqDCoCBfX3UzMiBmbGFnczsKPiAKPiDCoMKgwqDCoMKgwqDCoCAvKioK PiDCoMKgwqDCoMKgwqDCoMKgICogW2luXSBUaW1lb3V0IGluIG1pY3Jvc2Vjb25kcyBhZnRlciB3 aGljaCB0aGUga2VybmVsIG1heQo+IMKgwqDCoMKgwqDCoMKgwqAgKsKgwqAgY29uc2lkZXIgdGhl IGpvYiB0byBoYXZlIGh1bmcgYW5kIG1heSByZWFwIGl0IGFuZAo+IMKgwqDCoMKgwqDCoMKgwqAg KsKgwqAgZmFzdC1mb3J3YXJkIGl0cyBzeW5jcG9pbnQgaW5jcmVtZW50cy4KPiDCoMKgwqDCoMKg wqDCoMKgICoKPiDCoMKgwqDCoMKgwqDCoMKgICrCoMKgIFRoZSB2YWx1ZSBtYXkgYmUgY2FwcGVk IGJ5IHRoZSBrZXJuZWwuCj4gwqDCoMKgwqDCoMKgwqDCoCAqLwo+IMKgwqDCoMKgwqDCoMKgIF9f dTMyIHRpbWVvdXQ7Cj4gCj4gwqDCoMKgwqDCoMKgwqAgX191MzIgbnVtX3N5bmNwdF9pbmNyczsK PiDCoMKgwqDCoMKgwqDCoCBfX3UzMiBudW1fcmVsb2NhdGlvbnM7Cj4gwqDCoMKgwqDCoMKgwqAg X191MzIgbnVtX2NvbW1hbmRzOwo+IAo+IMKgwqDCoMKgwqDCoMKgIF9fdTY0IHN5bmNwdF9pbmNy czsKPiDCoMKgwqDCoMKgwqDCoCBfX3U2NCByZWxvY2F0aW9uczsKPiDCoMKgwqDCoMKgwqDCoCBf X3U2NCBjb21tYW5kczsKCkRvIHdlIHJlYWxseSBuZWVkIHRvIHJldGFpbiB0aGUgbXVsdGktZ2F0 aGVyIHN1cHBvcnQ/IFRoZSBjb2RlLWJsb2F0Cihib3RoIHVzZXJzcGFjZSBhbmQga2VybmVsIGRy aXZlcikgaXMgdmVyeSBzaWduaWZpY2FudCBqdXN0IGZvcgpwcmVwYXJpbmcgYW5kIHBhdGNoaW5n IG9mIHRoZSBtdWx0aS1idWZmZXIgY21kc3RyZWFtcy4KCklmIHVzZXJzcGFjZSBydW5zIG91dCBv ZiBhIGZyZWUgc3BhY2Ugd2l0aGluIHRoZSBwdXNoYnVmZmVyLCB0aGVuIGl0CnNob3VsZCBzaW1w bHkgcmVhbGxvY2F0ZSBhIGxhcmdlciBwdXNoYnVmZmVyLgoKSSdtIHN1Z2dlc3RpbmcgdGhhdCB3 ZSBzaG91bGQgaGF2ZSBhIHNpbmdsZSBnYXRoZXIgcGVyLWpvYiwgYW55IG9iamVjdGlvbnM/Cl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBt YWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo=