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Mon, 17 Aug 2026 22:54:13 -0700 (PDT) X-Received: by 2002:a05:6300:141:b0:3c8:e10b:7a9b with SMTP id adf61e73a8af0-3cc71b19c7emr37663839637.16.1787032453547; Mon, 17 Aug 2026 22:54:13 -0700 (PDT) Received: from [10.219.56.166] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cc13bf26a0esm1592712a12.8.2026.08.17.22.54.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 Aug 2026 22:54:13 -0700 (PDT) Message-ID: <376e0fa0-c863-45ae-a8f8-6d4b74ef0b8b@oss.qualcomm.com> Date: Tue, 18 Aug 2026 11:24:03 +0530 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 10/15] accel/qda: Add GEM_CREATE and GEM_MMAP_OFFSET IOCTLs To: Dmitry Baryshkov Cc: Oded Gabbay , Jonathan Corbet , Shuah Khan , Randy Dunlap , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Bharath Kumar , Chenna Kesava Raju , srinivas.kandagatla@oss.qualcomm.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-arm-msm@vger.kernel.org, llvm@lists.linux.dev, iommu@lists.linux.dev, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org References: <20260817-qda-v2-v2-0-69a02e9090d4@oss.qualcomm.com> <20260817-qda-v2-v2-10-69a02e9090d4@oss.qualcomm.com> Content-Language: en-US From: Ekansh Gupta In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODE4MDA0MiBTYWx0ZWRfX1SvJYSVaCSAo nWimAHGezW4CDAgrUMZA2tVMVrkrSno8jpByJZItRGiILu0ZDx7hA35bCmeyrSwsvZtfIphN00S gujxR/eT3gYM3dV3sz+ZHW+M5XRYoAk= X-Proofpoint-ORIG-GUID: wPOT_2OOf97MI41kMH3zYT-6TdW-ZR83 X-Authority-Analysis: v=2.4 cv=UfFhjqSN c=1 sm=1 tr=0 ts=6a83f386 cx=c_pps a=rz3CxIlbcmazkYymdCej/Q==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=cA8Zc-eO91vsJqbwH70A:9 a=QEXdDO2ut3YA:10 a=bFCP_H2QrGi7Okbo017w:22 X-Proofpoint-GUID: wPOT_2OOf97MI41kMH3zYT-6TdW-ZR83 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE4MDA0MiBTYWx0ZWRfX52F8PoaFUBGk SMVcpFRSzb/fCtRsMfcbaIjGoCulD7uLAVGRB9QLNYdF/qdiQSsLKIDEg8JY0Mh//aHVAecmh79 8Sm4vvf02RfUGnINVXXzHibQs5vTZbq4Ocwagv48MqoBC29aIkHYCIcKWkC4BMoa2WH4dRNgDz0 OZFCmRaQFKeOsNjVzEtjvujYLFPPkQbIwz5nw3Zc+14eYl1kuA8BO1Qmfl+dQwKMnwqE+d4fcEq Ns6eaQ+oRbz+WkhAJO7fupITX3yHayv+ad7HoKTEQ5fpRmPfmpSFdiq5Q0BpaniTeqJPP2j8HFE 3xQMfD2GkRlMx6Qnxj8Bb8l2q6bJgqcjK/VhtRvlc7LxJ/Kpd32Q2R23P2hfUKeN4syaIQaJsJV PgFBEwIMcLzYFPg7lsZ8D5NlREIqzqVFpa6oIWJXexbfQaZ9R3xfHndFs208klr1MGVdiFog/wO lJE8IbLX3gcPXO9fxew== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-17_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 impostorscore=0 suspectscore=0 adultscore=0 spamscore=0 priorityscore=1501 clxscore=1015 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608180042 On 18-08-2026 09:19, Dmitry Baryshkov wrote: > On Mon, Aug 17, 2026 at 10:17:45AM +0530, Ekansh Gupta wrote: >> Expose two new DRM IOCTLs that allow user-space to allocate DMA-backed >> GEM buffer objects and retrieve their mmap offsets. >> >> DRM_IOCTL_QDA_GEM_CREATE (drm_qda_gem_create) >> Allocates a DMA-coherent GEM buffer of the requested size. The >> memory manager assigns an IOMMU context bank to the calling process >> on first use and performs the DMA allocation against that bank. >> Returns a GEM handle that identifies the buffer for subsequent >> operations. >> >> DRM_IOCTL_QDA_GEM_MMAP_OFFSET (drm_qda_gem_mmap_offset) >> Returns the mmap offset for an existing GEM handle. The offset can >> be passed directly to mmap() to map the buffer into user-space. >> Imported DMA-BUF objects are rejected by drm_gem_dumb_map_offset(). >> >> DRIVER_GEM is added to driver_features now that GEM IOCTLs are >> present. >> >> Assisted-by: Claude:claude-sonnet-5 >> Signed-off-by: Ekansh Gupta >> --- >> drivers/accel/qda/qda_drv.c | 4 +++- >> drivers/accel/qda/qda_ioctl.c | 50 +++++++++++++++++++++++++++++++++++++++++++ >> drivers/accel/qda/qda_ioctl.h | 2 ++ >> include/uapi/drm/qda_accel.h | 36 +++++++++++++++++++++++++++++++ >> 4 files changed, 91 insertions(+), 1 deletion(-) >> > > The patch LGTM. THe commit messages needs a rewrite will fix to commit message, thanks.>