From: Long Li <longli@microsoft.com>
To: "K . Y . Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Shradha Gupta <shradhagupta@linux.microsoft.com>,
Simon Horman <horms@kernel.org>,
Konstantin Taranov <kotaranov@microsoft.com>,
Souradeep Chakrabarti <schakrabarti@linux.microsoft.com>,
Erick Archer <erick.archer@outlook.com>,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org
Cc: Long Li <longli@microsoft.com>
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 [thread overview]
Message-ID: <20260304000017.333312-1-longli@microsoft.com> (raw)
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
next reply other threads:[~2026-03-04 0:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 0:00 Long Li [this message]
2026-03-04 0:00 ` [PATCH v2 net-next 1/6] net: mana: Create separate EQs for each vPort Long Li
2026-03-04 14:58 ` Leon Romanovsky
2026-03-06 16:08 ` [v2,net-next,1/6] " Simon Horman
2026-03-06 20:45 ` [EXTERNAL] " Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 2/6] net: mana: Query device capabilities and configure MSI-X sharing for EQs Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 3/6] net: mana: Introduce GIC context with refcounting for interrupt management Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 4/6] net: mana: Use GIC functions to allocate global EQs Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 5/6] net: mana: Allocate interrupt context for each EQ when creating vPort Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 6/6] RDMA/mana_ib: Allocate interrupt contexts on EQs Long Li
2026-03-04 14:59 ` Leon Romanovsky
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