Introduce Receive Work Queue indirection table.
This object can be used to spread incoming traffic to different
receieve Work Queues.
Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxxxx>
---
drivers/infiniband/core/verbs.c | 52 +++++++++++++++++++++++++++++++++++++++
include/rdma/ib_verbs.h | 44 +++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index c63c622..12e1a82 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1494,6 +1494,58 @@ int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
}
EXPORT_SYMBOL(ib_modify_wq);
+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);
+
+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 (!rwq_ind_table->device->destroy_rwq_ind_table)
+ return -ENOSYS;
+
+ 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)
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 808ccee..d517abe 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1355,6 +1355,21 @@ struct ib_wq_attr {
enum ib_wq_state curr_wq_state;
};
+struct ib_rwq_ind_table {
+ struct ib_device *device;
+ struct ib_uobject *uobject;
+ atomic_t usecnt;
+ u32 ind_tbl_num;
+ u32 log_ind_tbl_size;
+ struct ib_wq **ind_tbl;
+};
+
+struct ib_rwq_ind_table_init_attr {
+ u32 log_ind_tbl_size;
+ /* Each entry is a pointer to Receive Work Queue */
+ struct ib_wq **ind_tbl;
+};
+
struct ib_qp {
struct ib_device *device;
struct ib_pd *pd;
@@ -1824,6 +1839,11 @@ struct ib_device {
struct ib_wq_attr *attr,
enum ib_wq_attr_mask attr_mask,
struct ib_udata *udata);
+ struct ib_rwq_ind_table * (*create_rwq_ind_table)(struct ib_device *device,
+ struct ib_rwq_ind_table_init_attr *init_attr,
+ struct ib_udata *udata);
+ int (*destroy_rwq_ind_table)(struct ib_rwq_ind_table *wq_ind_table);
+
struct ib_dma_mapping_ops *dma_ops;
@@ -3115,4 +3135,28 @@ int ib_destroy_wq(struct ib_wq *wq);
int ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *attr,
enum ib_wq_attr_mask attr_mask);
+/*
+ * ib_create_rwq_ind_table - Creates a RQ Indirection Table associated
+ * with the specified protection domain.
+ * @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.
+ *
+ * Return Value:
+ * ib_create_rwq_ind_table returns a pointer to the created
+ * Indirection Table, or NULL if the request fails.
+ */
+struct ib_rwq_ind_table *ib_create_rwq_ind_table(struct ib_device *device,
+ struct ib_rwq_ind_table_init_attr*
+ wq_ind_table_init_attr);
+/*
+ * 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 *wq_ind_table);
+
#endif /* IB_VERBS_H */
--
1.7.1
--
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