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 | 33 ++++++++++++++++++++++++++++++ include/rdma/restrack.h | 2 ++ 2 files changed, 35 insertions(+) diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index c9a0daf46499..08f282c91116 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -13,6 +13,15 @@ #include "cma_priv.h" +/** + * FIXME: Replace with official xa_array_cyclic(), once it is merged + * http://git.infradead.org/users/willy/linux-dax.git/commit/8bcca93a53949d20877e82c2aaae0fd7c385b90d + */ +struct rt_xa_limit { + u32 min; + u32 max; +}; + /** * struct rdma_restrack_root - main resource tracking management * entity, per-device @@ -27,6 +36,10 @@ struct rdma_restrack_root { * @xa: Array of XArray structure to hold restrack entries. */ struct xarray xa; + /** + * @range: Allocation ID range between min and max + */ + struct rt_xa_limit range; }; /** @@ -49,6 +62,7 @@ int rdma_restrack_init(struct ib_device *dev) for (i = 0 ; i < RDMA_RESTRACK_MAX; i++) { init_rwsem(&rt[i].rwsem); xa_init_flags(&rt[i].xa, XA_FLAGS_ALLOC); + rt[i].range.max = U32_MAX; } return 0; @@ -399,3 +413,22 @@ void rdma_restrack_del(struct rdma_restrack_entry *res) } } EXPORT_SYMBOL(rdma_restrack_del); + +/** + * 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) +{ + struct rdma_restrack_root *rt = dev->res; + + rt[type].range.max = max; + rt[type].range.min = reserved; +} +EXPORT_SYMBOL(rdma_rt_set_id_range); diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h index d66b0b052354..0706f51bb1f8 100644 --- a/include/rdma/restrack.h +++ b/include/rdma/restrack.h @@ -157,4 +157,6 @@ struct xarray *rdma_dev_to_xa(struct ib_device *dev, enum rdma_restrack_type type); void rdma_rt_read_lock(struct ib_device *dev, enum rdma_restrack_type type); void rdma_rt_read_unlock(struct ib_device *dev, enum rdma_restrack_type type); +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
