From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D1E2443E4A for ; Tue, 25 Aug 2026 12:45:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.98 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787661926; cv=none; b=L/4E2tYB7BMU6CikKKcyrlMvwz7zEDUNnZkV0Esaf0iHJxK3rGagWB3aVkaTqE09aRg2VNykuxC4dhUBrIsDBt3lo7x+3WNZhQttG4um91I4x/aDSQG+MLIST5SWmJ3lHdOwJRE0HXwf9zZoOEEeauh7VOmK5K0stHPGA3CBNMQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787661926; c=relaxed/simple; bh=9XPt/5iVbc+NiTB1mC1J4CUZMkWZpH6XxZwso8dsxEo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=PFIRDKqgDDxRaxj3MP/LIA3s3jH3RKus/vVm+6nJiXFUIGS3JAu2wN7d9oHL8dhOmIesMAqys7p5YT84CNtGlYK6lnRwd7GY1HxbVRDEiz4GFSKJdudZ82zzxPYGK9dEArHQiYbC5V18MldfMAMvj+114u/F8MHGSlyeDImz3uE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=BsBPBful; arc=none smtp.client-ip=115.124.30.98 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="BsBPBful" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1787661916; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=jvk03kh5puiCWZn8LHcj658G3qDnEUnCcC9bX8yWAs4=; b=BsBPBfulCGePuQsTHFH/v1e5VLpa5/8BTW0hQh7jvfUzOQBZkYWKTUf3bI1V3KxdmiV1tLnd2yGsoVbSzhsM3AgVicjqmB2T9WMtO6vWxkLwt0KoErMBl5r6vwyeyPlSYF5gO13cfUiWVfgM/KG55TtsrGdbgn07Be2hXzyQWt0= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045133197;MF=chengyou@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0X9dy.X1_1787661915; Received: from localhost(mailfrom:chengyou@linux.alibaba.com fp:SMTPD_---0X9dy.X1_1787661915 cluster:ay36) by smtp.aliyun-inc.com; Tue, 25 Aug 2026 20:45:16 +0800 From: Cheng Xu To: jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, KaiShen@linux.alibaba.com Subject: [PATCH for-next 0/4] RDMA/erdma: Support non-contiguous kernel queue buffers Date: Tue, 25 Aug 2026 20:45:06 +0800 Message-ID: <20260825124515.99370-1-chengyou@linux.alibaba.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, This small patchset introduces support for non-contiguous kernel queue buffers. Kernel QP and CQ buffers currently use a single coherent DMA allocation, which can fail for large queues when memory is fragmented. To address this, we allocate page-sized coherent buffers and describe them with the existing MTT. - #1 adds support for non-contiguous kernel QP buffers. - #2 adds support for non-contiguous kernel CQ buffers. - #3 unifies userspace and kernel space queue buffer management. - #4 moves kernel QP helpers after the shared memory helpers. Thanks, Cheng Xu Cheng Xu (4): RDMA/erdma: Support non-contiguous kernel QP buffers RDMA/erdma: Support non-contiguous kernel CQ buffers RDMA/erdma: Unify userspace and kernel queue buffer management RDMA/erdma: Move kernel QP helpers after memory helpers drivers/infiniband/hw/erdma/erdma_cq.c | 19 +- drivers/infiniband/hw/erdma/erdma_qp.c | 38 +- drivers/infiniband/hw/erdma/erdma_verbs.c | 579 +++++++++++++--------- drivers/infiniband/hw/erdma/erdma_verbs.h | 64 ++- 4 files changed, 420 insertions(+), 280 deletions(-) -- 2.31.1