From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
The IDs are supposed to be generated in ranges with reserved slots for
HW management, (e.g. reserved_pd in mlx4 and hns), so provide extra
function to set supported range.
This function was names rdma_rt_* and not rdma_restrack_* to simplify
the usage and spread across drivers.
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/core/restrack.c | 18 ++++++++++++++++++
include/rdma/restrack.h | 11 +++++++++++
2 files changed, 29 insertions(+)
diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c
index c50e95a82915..a3c94fe910a2 100644
--- a/drivers/infiniband/core/restrack.c
+++ b/drivers/infiniband/core/restrack.c
@@ -27,6 +27,14 @@ struct rdma_restrack_root {
* @xa: Array of XArray structure to hold restrack entries.
*/
struct xarray xa;
+ /**
+ * @reserved: Keep aside this number of indexes
+ */
+ u32 reserved;
+ /**
+ * @max: Maximal supported numer of indexes
+ */
+ u32 max;
};
int rdma_restrack_init(struct ib_device *dev)
@@ -354,3 +362,13 @@ void rdma_restrack_del(struct rdma_restrack_entry *res)
}
}
EXPORT_SYMBOL(rdma_restrack_del);
+
+void rdma_rt_set_id_range(struct ib_device *dev, enum rdma_restrack_type type,
+ u32 reserved, u32 max)
+{
+ struct rdma_restrack_root *rt = dev->res;
+
+ rt[type].max = max;
+ rt[type].reserved = reserved;
+}
+EXPORT_SYMBOL(rdma_rt_set_id_range);
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h
index 09cc4eff3f9d..4dba2e0ec90e 100644
--- a/include/rdma/restrack.h
+++ b/include/rdma/restrack.h
@@ -195,4 +195,15 @@ void rdma_rt_read_lock(struct ib_device *dev, enum rdma_restrack_type type);
* @type: resource track type
*/
void rdma_rt_read_unlock(struct ib_device *dev, enum rdma_restrack_type type);
+/**
+ * rdma_rt_set_id_range() - initialize IDs range. Devices which are able
+ * to manage thos IDs in HW will leave max and reserved
+ * as zero.
+ * @dev: IB device to work
+ * @type: resource track type
+ * @reserved: number of entries to keep aside
+ * @max: maximal possible value
+ */
+void rdma_rt_set_id_range(struct ib_device *dev, enum rdma_restrack_type type,
+ u32 reserved, u32 max);
#endif /* _RDMA_RESTRACK_H_ */
--
2.19.1
