From eca5757f804f046dfaab4e9d3ea39af1f2523990 Mon Sep 17 00:00:00 2001 From: Gal Pressman Date: Mon, 20 Apr 2020 09:22:12 +0300 Subject: [PATCH] RDMA/efa: Count mmap failures Add a new stat that counts mmap failures, which might help when debugging different issues. Link: https://lore.kernel.org/r/20200420062213.44577-3-galpress@amazon.com Reviewed-by: Firas JahJah Reviewed-by: Yossi Leybovich Signed-off-by: Gal Pressman Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/efa/efa.h | 3 ++- drivers/infiniband/hw/efa/efa_verbs.c | 9 +++++++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/efa/efa.h b/drivers/infiniband/hw/efa/efa.h index 45d519edb4c3..1889dd172a25 100644 --- a/drivers/infiniband/hw/efa/efa.h +++ b/drivers/infiniband/hw/efa/efa.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */ /* - * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All rights reserved. */ #ifndef _EFA_H_ @@ -40,6 +40,7 @@ struct efa_sw_stats { atomic64_t reg_mr_err; atomic64_t alloc_ucontext_err; atomic64_t create_ah_err; + atomic64_t mmap_err; }; /* Don't use anything other than atomic64 */ diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 43cc93b19569..1f8162b2067d 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -44,7 +44,8 @@ struct efa_user_mmap_entry { op(EFA_CREATE_CQ_ERR, "create_cq_err") \ op(EFA_REG_MR_ERR, "reg_mr_err") \ op(EFA_ALLOC_UCONTEXT_ERR, "alloc_ucontext_err") \ - op(EFA_CREATE_AH_ERR, "create_ah_err") + op(EFA_CREATE_AH_ERR, "create_ah_err") \ + op(EFA_MMAP_ERR, "mmap_err") #define EFA_STATS_ENUM(ename, name) ename, #define EFA_STATS_STR(ename, name) [ename] = name, @@ -1569,6 +1570,7 @@ static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext, ibdev_dbg(&dev->ibdev, "pgoff[%#lx] does not have valid entry\n", vma->vm_pgoff); + atomic64_inc(&dev->stats.sw_stats.mmap_err); return -EINVAL; } entry = to_emmap(rdma_entry); @@ -1604,12 +1606,14 @@ static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext, err = -EINVAL; } - if (err) + if (err) { ibdev_dbg( &dev->ibdev, "Couldn't mmap address[%#llx] length[%#zx] mmap_flag[%d] err[%d]\n", entry->address, rdma_entry->npages * PAGE_SIZE, entry->mmap_flag, err); + atomic64_inc(&dev->stats.sw_stats.mmap_err); + } rdma_user_mmap_entry_put(rdma_entry); return err; @@ -1758,6 +1762,7 @@ int efa_get_hw_stats(struct ib_device *ibdev, struct rdma_hw_stats *stats, stats->value[EFA_REG_MR_ERR] = atomic64_read(&s->sw_stats.reg_mr_err); stats->value[EFA_ALLOC_UCONTEXT_ERR] = atomic64_read(&s->sw_stats.alloc_ucontext_err); stats->value[EFA_CREATE_AH_ERR] = atomic64_read(&s->sw_stats.create_ah_err); + stats->value[EFA_MMAP_ERR] = atomic64_read(&s->sw_stats.mmap_err); return ARRAY_SIZE(efa_stats_names); } -- 2.11.0