diff options
| author | Yonatan Cohen <yonatanc@mellanox.com> | 2017-11-13 11:51:13 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-11-14 00:59:22 +0300 |
| commit | 869ddcf8b351ace5bf8860f3cd6265dccb382426 (patch) | |
| tree | 52e0134b73d34d90a96c6a0c036c8ca8da0fc4ed /drivers/infiniband | |
| parent | bc52e9ca74b9a395897bb640c6671b2cbf716032 (diff) | |
| download | linux-869ddcf8b351ace5bf8860f3cd6265dccb382426.tar.xz | |
IB/uverbs: Allow CQ moderation with modify CQ
Uverbs support in modify_cq for CQ moderation only.
Gives ability to change cq_max_count and cq_period.
CQ moderation enhance performance by moderating the number
of CQEs needed to create an event instead of application
having to suffer from event per-CQE.
To achieve CQ moderation the application needs to set cq_max_count
and cq_period.
cq_max_count - defines the number of CQEs needed to create an event.
cq_period - defines the timeout (micro seconds) between last
event and a new one that will occur even if
cq_max_count was not satisfied
Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 42 | ||||
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 1 |
3 files changed, 44 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h index ee2739ae4305..deccefb71a6b 100644 --- a/drivers/infiniband/core/uverbs.h +++ b/drivers/infiniband/core/uverbs.h @@ -306,5 +306,6 @@ IB_UVERBS_DECLARE_EX_CMD(destroy_wq); IB_UVERBS_DECLARE_EX_CMD(create_rwq_ind_table); IB_UVERBS_DECLARE_EX_CMD(destroy_rwq_ind_table); IB_UVERBS_DECLARE_EX_CMD(modify_qp); +IB_UVERBS_DECLARE_EX_CMD(modify_cq); #endif /* UVERBS_H */ diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 8ca36843ef38..3c2673cd4090 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -3856,3 +3856,45 @@ end: err = ib_copy_to_udata(ucore, &resp, resp.response_length); return err; } + +int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file, + struct ib_device *ib_dev, + struct ib_udata *ucore, + struct ib_udata *uhw) +{ + struct ib_uverbs_ex_modify_cq cmd = {}; + struct ib_cq *cq; + size_t required_cmd_sz; + int ret; + + required_cmd_sz = offsetof(typeof(cmd), reserved) + + sizeof(cmd.reserved); + if (ucore->inlen < required_cmd_sz) + return -EINVAL; + + /* sanity checks */ + if (ucore->inlen > sizeof(cmd) && + !ib_is_udata_cleared(ucore, sizeof(cmd), + ucore->inlen - sizeof(cmd))) + return -EOPNOTSUPP; + + ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen)); + if (ret) + return ret; + + if (!cmd.attr_mask || cmd.reserved) + return -EINVAL; + + if (cmd.attr_mask > IB_CQ_MODERATE) + return -EOPNOTSUPP; + + cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext); + if (!cq) + return -EINVAL; + + ret = ib_modify_cq(cq, cmd.attr.cq_count, cmd.attr.cq_period); + + uobj_put_obj_read(cq); + + return ret; +} diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index b5febfd84ee5..381fd9c096ae 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -128,6 +128,7 @@ static int (*uverbs_ex_cmd_table[])(struct ib_uverbs_file *file, [IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL] = ib_uverbs_ex_create_rwq_ind_table, [IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL] = ib_uverbs_ex_destroy_rwq_ind_table, [IB_USER_VERBS_EX_CMD_MODIFY_QP] = ib_uverbs_ex_modify_qp, + [IB_USER_VERBS_EX_CMD_MODIFY_CQ] = ib_uverbs_ex_modify_cq, }; static void ib_uverbs_add_one(struct ib_device *device); |