This series moves EQ ownership from the shared mana_context to per-vPort
mana_port_context, enabling each vPort to have dedicated MSI-X vectors
when the hardware provides enough vectors. When vectors are limited, the
driver falls back to sharing MSI-X among vPorts.
The series introduces a GDMA IRQ Context (GIC) abstraction with reference
counting to manage interrupt context lifecycle. This allows both Ethernet
and RDMA EQs to dynamically acquire dedicated or shared MSI-X vectors at
vPort creation time rather than pre-allocating all vectors at probe time.
Key changes:
- Per-vPort EQ allocation with exported lifecycle functions for RDMA use
- Device capability query to determine dedicated vs shared MSI-X mode
- GIC context with refcounting for flexible interrupt management
- On-demand interrupt context allocation when creating vPort EQs
- RDMA EQ integration with the GIC framework
Changes in v8:
- Fix comment to reference per-vPort queue count instead of
gc->max_num_queues (patch 2)
- Remove duplicate irq_update_affinity_hint() calls from error paths
and mana_gd_remove_irqs(); the clearing is now centralized in
mana_gd_put_gic() (patch 4)
- Note the IRQ name change (mana_q -> mana_msi) in the commit
message (patch 4)
- Remove dead conditional write to spec.eq.msix_index (patch 5)
- Document GIC ownership contract and msix_index invariant change
in commit message (patch 5)
- Populate eq.irq on RDMA EQs for consistency with the Ethernet
path (patch 6)
- Document BIT(6) relocation and capability flag semantics in
commit message (patch 6)
- Fix checkpatch --strict alignment and line length warnings
Changes in v7:
- Use rounddown_pow_of_two() instead of roundup_pow_of_two() when
computing per-vPort queue count to avoid unnecessarily forcing shared
MSI-X mode (patch 2)
- Call mana_gd_setup_remaining_irqs() unconditionally to ensure
irq_contexts are populated in both dedicated and shared MSI-X modes,
fixing bisectability between patches 2 and 5 (patch 2)
- Guard ibdev_dbg() in mana_ib_cfg_vport() with error check so the
vport handle is not logged on the failure path (patch 1)
- Use cached gic->irq instead of pci_irq_vector() lookup in
mana_gd_put_gic() for consistency with the allocation path (patch 3)
- Fix unsigned int* to int* pointer type mismatch when calling
mana_gd_get_gic() by using a local int variable for the MSI index
(patches 5, 6)
Changes in v6:
- Rebased on net-next/main (v7.1-rc1)
Changes in v5:
- Rebased on net-next/main
Changes in v4:
- Rebased on net-next/main 7.0-rc4
- Patch 2: Use MANA_DEF_NUM_QUEUES instead of hardcoded 16 for
max_num_queues clamping
- Patch 3: Track dyn_msix in GIC context instead of re-checking
pci_msix_can_alloc_dyn() on each call; improved remove_irqs iteration
to skip unallocated entries
Changes in v3:
- Rebased on net-next/main
- Patch 1: Added NULL check for mpc->eqs in mana_ib_create_qp_rss() to
prevent NULL pointer dereference when RSS QP is created before a raw QP
has configured the vport and allocated EQs
Changes in v2:
- Rebased on net-next/main (adapted to kzalloc_objs/kzalloc_obj macros,
new GDMA_DRV_CAP_FLAG definitions)
- Patch 2: Fixed misleading comment for max_num_queues vs
max_num_queues_vport in gdma.h
- Patch 3: Fixed spelling typo in gdma_main.c ("difference" -> "different")
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 | 62 +++-
drivers/infiniband/hw/mana/qp.c | 16 +-
.../net/ethernet/microsoft/mana/gdma_main.c | 316 +++++++++++++-----
drivers/net/ethernet/microsoft/mana/mana_en.c | 169 ++++++----
include/net/mana/gdma.h | 33 +-
include/net/mana/mana.h | 7 +-
6 files changed, 434 insertions(+), 169 deletions(-)
--
2.43.0
