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path: root/drivers/infiniband/hw/mlx4/qp.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx4/qp.c')
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 65e4ec549368..519919d15474 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -3943,3 +3943,73 @@ int mlx4_ib_destroy_wq(struct ib_wq *ibwq)
return 0;
}
+
+struct ib_rwq_ind_table
+*mlx4_ib_create_rwq_ind_table(struct ib_device *device,
+ struct ib_rwq_ind_table_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ struct ib_rwq_ind_table *rwq_ind_table;
+ struct mlx4_ib_create_rwq_ind_tbl_resp resp = {};
+ unsigned int ind_tbl_size = 1 << init_attr->log_ind_tbl_size;
+ unsigned int base_wqn;
+ size_t min_resp_len;
+ int i;
+ int err;
+
+ if (udata->inlen > 0 &&
+ !ib_is_udata_cleared(udata, 0,
+ udata->inlen))
+ return ERR_PTR(-EOPNOTSUPP);
+
+ min_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
+ if (udata->outlen && udata->outlen < min_resp_len)
+ return ERR_PTR(-EINVAL);
+
+ if (ind_tbl_size >
+ device->attrs.rss_caps.max_rwq_indirection_table_size) {
+ pr_debug("log_ind_tbl_size = %d is bigger than supported = %d\n",
+ ind_tbl_size,
+ device->attrs.rss_caps.max_rwq_indirection_table_size);
+ return ERR_PTR(-EINVAL);
+ }
+
+ base_wqn = init_attr->ind_tbl[0]->wq_num;
+
+ if (base_wqn % ind_tbl_size) {
+ pr_debug("WQN=0x%x isn't aligned with indirection table size\n",
+ base_wqn);
+ return ERR_PTR(-EINVAL);
+ }
+
+ for (i = 1; i < ind_tbl_size; i++) {
+ if (++base_wqn != init_attr->ind_tbl[i]->wq_num) {
+ pr_debug("indirection table's WQNs aren't consecutive\n");
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ rwq_ind_table = kzalloc(sizeof(*rwq_ind_table), GFP_KERNEL);
+ if (!rwq_ind_table)
+ return ERR_PTR(-ENOMEM);
+
+ if (udata->outlen) {
+ resp.response_length = offsetof(typeof(resp), response_length) +
+ sizeof(resp.response_length);
+ err = ib_copy_to_udata(udata, &resp, resp.response_length);
+ if (err)
+ goto err;
+ }
+
+ return rwq_ind_table;
+
+err:
+ kfree(rwq_ind_table);
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_destroy_rwq_ind_table(struct ib_rwq_ind_table *ib_rwq_ind_tbl)
+{
+ kfree(ib_rwq_ind_tbl);
+ return 0;
+}

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