diff options
author | Yishai Hadas <yishaih@mellanox.com> | 2016-05-23 15:20:51 +0300 |
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committer | Doug Ledford <dledford@redhat.com> | 2016-06-23 11:02:43 -0400 |
commit | 6d39786bf116e476d75eca91f7cfa22586a32e5f (patch) | |
tree | 26387c5a3539940d640b362422185f608e7d6f14 /drivers/infiniband/core/verbs.c | |
parent | 79b20a6c3014c789253fcb1ac4f09f8bdee2e94b (diff) |
IB/core: Introduce Receive Work Queue indirection table
Introduce Receive Work Queue (WQ) indirection table.
This object can be used to spread incoming traffic to different
receive Work Queues.
A Receive WQ indirection table points to variable size of WQs.
This table is given to a QP in downstream patches.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimerg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/verbs.c')
-rw-r--r-- | drivers/infiniband/core/verbs.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index c096cadc6e23..6b548d7f8753 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1636,6 +1636,68 @@ int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr, } EXPORT_SYMBOL(ib_modify_wq); +/* + * ib_create_rwq_ind_table - Creates a RQ Indirection Table. + * @device: The device on which to create the rwq indirection table. + * @ib_rwq_ind_table_init_attr: A list of initial attributes required to + * create the Indirection Table. + * + * Note: The life time of ib_rwq_ind_table_init_attr->ind_tbl is not less + * than the created ib_rwq_ind_table object and the caller is responsible + * for its memory allocation/free. + */ +struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device, + struct ib_rwq_ind_table_init_attr *init_attr) +{ + struct ib_rwq_ind_table *rwq_ind_table; + int i; + u32 table_size; + + if (!device->create_rwq_ind_table) + return ERR_PTR(-ENOSYS); + + table_size = (1 << init_attr->log_ind_tbl_size); + rwq_ind_table = device->create_rwq_ind_table(device, + init_attr, NULL); + if (IS_ERR(rwq_ind_table)) + return rwq_ind_table; + + rwq_ind_table->ind_tbl = init_attr->ind_tbl; + rwq_ind_table->log_ind_tbl_size = init_attr->log_ind_tbl_size; + rwq_ind_table->device = device; + rwq_ind_table->uobject = NULL; + atomic_set(&rwq_ind_table->usecnt, 0); + + for (i = 0; i < table_size; i++) + atomic_inc(&rwq_ind_table->ind_tbl[i]->usecnt); + + return rwq_ind_table; +} +EXPORT_SYMBOL(ib_create_rwq_ind_table); + +/* + * ib_destroy_rwq_ind_table - Destroys the specified Indirection Table. + * @wq_ind_table: The Indirection Table to destroy. +*/ +int ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *rwq_ind_table) +{ + int err, i; + u32 table_size = (1 << rwq_ind_table->log_ind_tbl_size); + struct ib_wq **ind_tbl = rwq_ind_table->ind_tbl; + + if (atomic_read(&rwq_ind_table->usecnt)) + return -EBUSY; + + err = rwq_ind_table->device->destroy_rwq_ind_table(rwq_ind_table); + if (!err) { + for (i = 0; i < table_size; i++) + atomic_dec(&ind_tbl[i]->usecnt); + } + + return err; +} +EXPORT_SYMBOL(ib_destroy_rwq_ind_table); + struct ib_flow *ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_attr, int domain) |