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Wed, 26 Mar 2025 16:16:03 +0100 Date: Wed, 26 Mar 2025 16:16:03 +0100 From: Johan Hovold To: Jeff Johnson Cc: Johan Hovold , Jeff Johnson , Stephan Gerhold , ath12k@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] wifi: ath12k: extend dma mask to 36 bits Message-ID: References: <20250321162331.19507-1-johan+linaro@kernel.org> <8edf77d9-1afd-402a-b966-d1b3e5b4ba1b@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8edf77d9-1afd-402a-b966-d1b3e5b4ba1b@oss.qualcomm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250326_081603_160447_28E6CF6F X-CRM114-Status: GOOD ( 15.46 ) X-BeenThere: ath12k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath12k" Errors-To: ath12k-bounces+ath12k=archiver.kernel.org@lists.infradead.org On Wed, Mar 26, 2025 at 08:11:11AM -0700, Jeff Johnson wrote: > On 3/21/2025 9:23 AM, Johan Hovold wrote: > > Extend the DMA mask to 36 bits to avoid using bounce buffers on machines > > without an iommu (under OS control) similar to what was done for ath11k > > in commit dbd73acb22d8 ("wifi: ath11k: enable 36 bit mask for stream > > DMA"). > > > > This specifically avoids using bounce buffers on Qualcomm Snapdragon X > > Elite machines like the Lenovo ThinkPad T14s when running at EL1. > > > > Note that the mask could possibly be extended further but unresolved DMA > > issues with 64 GiB X Elite machines currently prevents that from being > > tested. > > > > Also note that the driver is limited to 32 bits for coherent > > allocations and that there is no need to check for errors when setting > > masks larger than 32 bits. > > > > Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 > > > > Signed-off-by: Johan Hovold > > --- > > Please make sure to include linux-wireless for all ath.git patches so that > they are processed by patchwork.kernel.org Ok, I'll try to remember that, but it seems you need to update MAINTAINERS to include that list: $ scripts/get_maintainer.pl 0001-wifi-ath12k-extend-dma-mask-to-36-bits.patch Jeff Johnson (supporter:QUALCOMM ATH12K WIRELESS DRIVER) ath12k@lists.infradead.org (open list:QUALCOMM ATH12K WIRELESS DRIVER) linux-kernel@vger.kernel.org (open list) Do you want me to resend? Johan