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 <[email protected]> --- drivers/infiniband/hw/mana/main.c | 41 +++++++++++++++++++++++++------ include/net/mana/gdma.h | 7 ++++-- 2 files changed, 38 insertions(+), 10 deletions(-) diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c index 8000ab6e8beb..0dc47540fb6f 100644 --- a/drivers/infiniband/hw/mana/main.c +++ b/drivers/infiniband/hw/mana/main.c @@ -749,7 +749,8 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev) { struct gdma_context *gc = mdev_to_gc(mdev); struct gdma_queue_spec spec = {}; - int err, i; + struct gdma_irq_context *gic; + int err, i, msi; spec.type = GDMA_EQ; spec.monitor_avl_buf = false; @@ -757,11 +758,18 @@ int mana_ib_create_eqs(struct mana_ib_dev *mdev) spec.eq.callback = mana_ib_event_handler; spec.eq.context = mdev; spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE; - spec.eq.msix_index = 0; + + msi = 0; + gic = mana_gd_get_gic(gc, false, &msi); + if (!gic) + return -ENOMEM; + spec.eq.msix_index = msi; 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 = kzalloc_objs(struct gdma_queue *, mdev->ib_dev.num_comp_vectors); @@ -771,32 +779,49 @@ 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; + msi = (i + 1) % gc->num_msix_usable; + + gic = mana_gd_get_gic(gc, false, &msi); + if (!gic) { + err = -ENOMEM; + goto destroy_eqs; + } + spec.eq.msix_index = msi; + err = mana_gd_create_mana_eq(mdev->gdma_dev, &spec, &mdev->eqs[i]); - if (err) + if (err) { + mana_gd_put_gic(gc, false, msi); 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 6c138cc77407..d84e474309a3 100644 --- a/include/net/mana/gdma.h +++ b/include/net/mana/gdma.h @@ -615,6 +615,7 @@ enum { #define GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG BIT(3) #define GDMA_DRV_CAP_FLAG_1_GDMA_PAGES_4MB_1GB_2GB BIT(4) #define GDMA_DRV_CAP_FLAG_1_VARIABLE_INDIRECTION_TABLE_SUPPORT BIT(5) +#define GDMA_DRV_CAP_FLAG_1_HW_VPORT_LINK_AWARE BIT(6) /* Driver can handle holes (zeros) in the device list */ #define GDMA_DRV_CAP_FLAG_1_DEV_LIST_HOLES_SUP BIT(11) @@ -631,7 +632,8 @@ enum { /* Driver detects stalled send queues and recovers them */ #define GDMA_DRV_CAP_FLAG_1_HANDLE_STALL_SQ_RECOVERY BIT(18) -#define GDMA_DRV_CAP_FLAG_1_HW_VPORT_LINK_AWARE BIT(6) +/* Driver supports separate EQ/MSIs for each vPort */ +#define GDMA_DRV_CAP_FLAG_1_EQ_MSI_UNSHARE_MULTI_VPORT BIT(19) /* Driver supports linearizing the skb when num_sge exceeds hardware limit */ #define GDMA_DRV_CAP_FLAG_1_SKB_LINEARIZE BIT(20) @@ -659,7 +661,8 @@ enum { 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_HWC_TIMEOUT_RECOVERY) + GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECOVERY | \ + GDMA_DRV_CAP_FLAG_1_EQ_MSI_UNSHARE_MULTI_VPORT) #define GDMA_DRV_CAP_FLAGS2 0 -- 2.43.0
