[PATCH net-next 6/6] RDMA/mana_ib: Allocate interrupt contexts on EQs
From: Long Li <longli@microsoft.com>
Date: 2026-02-28 02:11:57
Also in:
linux-hyperv, linux-rdma, lkml
Subsystem:
infiniband subsystem, microsoft mana rdma driver, networking [general], the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Long Li, Konstantin Taranov, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Use the GIC functions to allocate interrupt contexts for RDMA EQs. These interrupt contexts may be shared with Ethernet EQs when MSI-X vectors are limited. The driver now supports allocating dedicated MSI-X for each EQ. Indicate this capability through driver capability bits. Signed-off-by: Long Li <longli@microsoft.com> --- drivers/infiniband/hw/mana/main.c | 33 ++++++++++++++++++++++++++----- include/net/mana/gdma.h | 5 ++++- 2 files changed, 32 insertions(+), 6 deletions(-)
diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
index cfa954460585..029609fb91c5 100644
--- a/drivers/infiniband/hw/mana/main.c
+++ b/drivers/infiniband/hw/mana/main.c@@ -787,6 +787,7 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev) { struct gdma_context *gc = mdev_to_gc(mdev); struct gdma_queue_spec spec = {}; + struct gdma_irq_context *gic; int err, i; spec.type = GDMA_EQ;
@@ -797,9 +798,15 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev) spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; spec.eq.msix_index = 0; + gic = mana_gd_get_gic(gc, false, &spec.eq.msix_index); + if (!gic) + return -ENOMEM; + err = mana_gd_create_mana_eq(mdev->gdma_dev, &spec, &mdev->fatal_err_eq); - if (err) + if (err) { + mana_gd_put_gic(gc, false, 0); return err; + } mdev->eqs = kcalloc(mdev->ib_dev.num_comp_vectors, sizeof(struct gdma_queue *), GFP_KERNEL);
@@ -810,31 +817,47 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev) spec.eq.callback = NULL; for (i = 0; i < mdev->ib_dev.num_comp_vectors; i++) { spec.eq.msix_index = (i + 1) % gc->num_msix_usable; + + gic = mana_gd_get_gic(gc, false, &spec.eq.msix_index); + if (!gic) { + err = -ENOMEM; + goto destroy_eqs; + } + err = mana_gd_create_mana_eq(mdev->gdma_dev, &spec, &mdev->eqs[i]); - if (err) + if (err) { + mana_gd_put_gic(gc, false, spec.eq.msix_index); goto destroy_eqs; + } } return 0; destroy_eqs: - while (i-- > 0) + while (i-- > 0) { mana_gd_destroy_queue(gc, mdev->eqs[i]); + mana_gd_put_gic(gc, false, (i + 1) % gc->num_msix_usable); + } kfree(mdev->eqs); destroy_fatal_eq: mana_gd_destroy_queue(gc, mdev->fatal_err_eq); + mana_gd_put_gic(gc, false, 0); return err; } void mana_ib_destroy_eqs(struct mana_ib_dev *mdev) { struct gdma_context *gc = mdev_to_gc(mdev); - int i; + int i, msi; mana_gd_destroy_queue(gc, mdev->fatal_err_eq); + mana_gd_put_gic(gc, false, 0); - for (i = 0; i < mdev->ib_dev.num_comp_vectors; i++) + for (i = 0; i < mdev->ib_dev.num_comp_vectors; i++) { mana_gd_destroy_queue(gc, mdev->eqs[i]); + msi = (i + 1) % gc->num_msix_usable; + mana_gd_put_gic(gc, false, msi); + } kfree(mdev->eqs); }
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index 4eb94d1df439..f0d5c873f856 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h@@ -610,6 +610,8 @@ enum { /* Driver supports dynamic MSI-X vector allocation */ #define GDMA_DRV_CAP_FLAG_1_DYNAMIC_IRQ_ALLOC_SUPPORT BIT(13) +/* Driver supports separate EQ/MSIs for each vPort */ +#define GDMA_DRV_CAP_FLAG_1_EQ_MSI_UNSHARE_MULTI_VPORT BIT(19) /* Driver can self reset on EQE notification */ #define GDMA_DRV_CAP_FLAG_1_SELF_RESET_ON_EQE BIT(14)
@@ -644,7 +646,8 @@ enum { GDMA_DRV_CAP_FLAG_1_PERIODIC_STATS_QUERY | \ GDMA_DRV_CAP_FLAG_1_SKB_LINEARIZE | \ GDMA_DRV_CAP_FLAG_1_PROBE_RECOVERY | \ - GDMA_DRV_CAP_FLAG_1_HANDLE_STALL_SQ_RECOVERY) + GDMA_DRV_CAP_FLAG_1_HANDLE_STALL_SQ_RECOVERY | \ + GDMA_DRV_CAP_FLAG_1_EQ_MSI_UNSHARE_MULTI_VPORT) #define GDMA_DRV_CAP_FLAGS2 0
--
2.43.0