> This supports both manual mapping of lots of SGEs, as well as using MRs
> from the QP's MR pool, for iWarp or other cases where it's more optimal.
> For now, MRs are only used for iWARP transports. The user of the RDMA-RW
> API must allocate the QP MR pool as well as size the SQ accordingly.
>
> Thanks to Steve Wise for testing, fixing and rewriting the iWarp support,
> and to Sagi Grimberg for ideas, reviews and fixes.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/infiniband/core/Makefile | 2 +-
> drivers/infiniband/core/mr_pool.c | 4 +-
> drivers/infiniband/core/rw.c | 419 ++++++++++++++++++++++++++++++++++++++
> drivers/infiniband/core/verbs.c | 25 +++
> include/rdma/ib_verbs.h | 14 +-
> include/rdma/rw.h | 69 +++++++
> 6 files changed, 530 insertions(+), 3 deletions(-)
> create mode 100644 drivers/infiniband/core/rw.c
> create mode 100644 include/rdma/rw.h
>
> diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile
> index 48bd9d8..26987d9 100644
> --- a/drivers/infiniband/core/Makefile
> +++ b/drivers/infiniband/core/Makefile
> @@ -8,7 +8,7 @@ obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
> obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o \
> $(user_access-y)
>
> -ib_core-y := packer.o ud_header.o verbs.o cq.o sysfs.o \
> +ib_core-y := packer.o ud_header.o verbs.o cq.o rw.o sysfs.o \
> device.o fmr_pool.o cache.o netlink.o \
> roce_gid_mgmt.o mr_pool.o
> ib_core-$(CONFIG_INFINIBAND_USER_MEM) += umem.o
> diff --git a/drivers/infiniband/core/mr_pool.c b/drivers/infiniband/core/mr_pool.c
> index b1eb27a..9751bb1 100644
> --- a/drivers/infiniband/core/mr_pool.c
> +++ b/drivers/infiniband/core/mr_pool.c
> @@ -20,8 +20,10 @@ struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list)
>
> spin_lock_irqsave(&qp->mr_lock, flags);
> mr = list_first_entry_or_null(list, struct ib_mr, qp_entry);
> - if (mr)
> + if (mr) {
> + list_del(&mr->qp_entry);
> qp->mrs_used++;
> + }
> spin_unlock_irqrestore(&qp->mr_lock, flags);
>
Should the above be squashed into the mr_pool patch?
Also, in your isert WIP patch from your git repo:
patch 46debb67 ("IB/core: add a MR pool for signature MRs")
You accidentally undid the above change:
@@ -20,10 +20,8 @@ struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list)
spin_lock_irqsave(&qp->mr_lock, flags);
mr = list_first_entry_or_null(list, struct ib_mr, qp_entry);
- if (mr) {
- list_del(&mr->qp_entry);
+ if (mr)
qp->mrs_used++;
- }
spin_unlock_irqrestore(&qp->mr_lock, flags);
return mr;
It causes a few Oopses... :)
Steve.
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