From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 586842AD03; Wed, 4 Mar 2026 00:00:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772582425; cv=none; b=OFsRKPQvsQCLwJswNtXJiSPLPjuZrWfs/gtq48IMakmt3ex5mi8gwP1KCXIv/ZfuoHM9C8gIY4aO33F3+CCd12PtOYrOvee/LrJav2x53qp/kdlQQRRkiDVSHcFUwsOVQ20IUNXyDEC8gLSEjfoqVamfpW9HrGZ4ocunpkwHyfs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772582425; c=relaxed/simple; bh=wlHXxl94c3FVzCJgGlKQh8b5W5pdN7iksMq3/nW5ymI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cxq+kwBRfDYRGO/Gj3U89imG4J3GOfc1zN/gMdcFrIcnk/3+yUUOzsLMazR5XtQwQXU1vGW74i93+74MYLwemOwXHucDS5tyl7mp79hCma2MEiY+ls7vKnZ273zutP8hfuJ4JjmKwoMG435p03U3AIrMQwGwuvKdo7JJ9qhQiKk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Received: by linux.microsoft.com (Postfix, from userid 1202) id 0B3E020B6F02; Tue, 3 Mar 2026 16:00:24 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 0B3E020B6F02 From: Long Li To: "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shradha Gupta , Simon Horman , Konstantin Taranov , Souradeep Chakrabarti , Erick Archer , linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Long Li Subject: [PATCH v2 net-next 0/6] net: mana: Per-vPort EQ and MSI-X interrupt management Date: Tue, 3 Mar 2026 16:00:11 -0800 Message-ID: <20260304000017.333312-1-longli@microsoft.com> X-Mailer: git-send-email 2.43.7 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series adds per-vPort Event Queue (EQ) allocation and MSI-X interrupt management for the MANA driver. Previously, all vPorts shared a single set of EQs. This change enables dedicated EQs per vPort with support for both dedicated and shared MSI-X vector allocation modes. Patch 1 moves EQ ownership from mana_context to per-vPort mana_port_context and exports create/destroy functions for the RDMA driver. Patch 2 adds device capability queries to determine whether MSI-X vectors should be dedicated per-vPort or shared. When the number of available MSI-X vectors is insufficient for dedicated allocation, the driver enables sharing mode with bitmap-based vector assignment. Patch 3 introduces the GIC (GDMA IRQ Context) abstraction with reference counting, allowing multiple EQs to safely share a single MSI-X vector. Patch 4 converts the global EQ allocation in probe/resume to use the new GIC functions. Patch 5 adds per-vPort GIC lifecycle management, calling get/put on each EQ creation and destruction during vPort open/close. Patch 6 extends the same GIC lifecycle management to the RDMA driver's EQ allocation path and advertises the EQ_MSI_UNSHARE_MULTI_VPORT capability. Tested on Azure VMs with 2, 3, and 4 NIC configurations: - Both MSI sharing modes verified: mode 0 (dedicated) and mode 1 (shared) - NIC up/down with clean VF data path switch on all interfaces - Bulk NIC down/up (all interfaces simultaneously) - iperf3 throughput: up to 181 Gbps (16 streams, Boost192) Changes in v2: - Rebased onto net-next/main - Fixed spelling typo in patch 3 ("difference" -> "different") - Moved HW_VPORT_LINK_AWARE define to numerical order in patch 6 Long Li (6): net: mana: Create separate EQs for each vPort net: mana: Query device capabilities and configure MSI-X sharing for EQs net: mana: Introduce GIC context with refcounting for interrupt management net: mana: Use GIC functions to allocate global EQs net: mana: Allocate interrupt context for each EQ when creating vPort RDMA/mana_ib: Allocate interrupt contexts on EQs drivers/infiniband/hw/mana/main.c | 47 ++- drivers/infiniband/hw/mana/qp.c | 4 +- .../net/ethernet/microsoft/mana/gdma_main.c | 309 +++++++++++++----- drivers/net/ethernet/microsoft/mana/mana_en.c | 162 +++++---- include/net/mana/gdma.h | 31 +- include/net/mana/mana.h | 7 +- 6 files changed, 402 insertions(+), 158 deletions(-) -- 2.43.0