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authorMark Bloch <mbloch@nvidia.com>2021-03-01 09:04:20 +0200
committerJason Gunthorpe <jgg@nvidia.com>2021-03-26 09:31:21 -0300
commit1fb7f8973f51ca1a7ffe61a2c779ed15f57f3d82 (patch)
tree9fee23821e374c8fb844521d88f87ea377c529f6 /drivers/infiniband/hw/usnic/usnic_ib_verbs.h
parentRDMA/hns: Support to query firmware version (diff)
downloadlinux-dev-1fb7f8973f51ca1a7ffe61a2c779ed15f57f3d82.tar.xz
linux-dev-1fb7f8973f51ca1a7ffe61a2c779ed15f57f3d82.zip
RDMA: Support more than 255 rdma ports
Current code uses many different types when dealing with a port of a RDMA device: u8, unsigned int and u32. Switch to u32 to clean up the logic. This allows us to make (at least) the core view consistent and use the same type. Unfortunately not all places can be converted. Many uverbs functions expect port to be u8 so keep those places in order not to break UAPIs. HW/Spec defined values must also not be changed. With the switch to u32 we now can support devices with more than 255 ports. U32_MAX is reserved to make control logic a bit easier to deal with. As a device with U32_MAX ports probably isn't going to happen any time soon this seems like a non issue. When a device with more than 255 ports is created uverbs will report the RDMA device as having 255 ports as this is the max currently supported. The verbs interface is not changed yet because the IBTA spec limits the port size in too many places to be u8 and all applications that relies in verbs won't be able to cope with this change. At this stage, we are extending the interfaces that are using vendor channel solely Once the limitation is lifted mlx5 in switchdev mode will be able to have thousands of SFs created by the device. As the only instance of an RDMA device that reports more than 255 ports will be a representor device and it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other ULPs aren't effected by this change and their sysfs/interfaces that are exposes to userspace can remain unchanged. While here cleanup some alignment issues and remove unneeded sanity checks (mainly in rdmavt), Link: https://lore.kernel.org/r/20210301070420.439400-1-leon@kernel.org Signed-off-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/usnic/usnic_ib_verbs.h')
-rw-r--r--drivers/infiniband/hw/usnic/usnic_ib_verbs.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.h b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
index 11fe1ba6bbc9..6b82d0f2d184 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
@@ -37,16 +37,16 @@
#include "usnic_ib.h"
enum rdma_link_layer usnic_ib_port_link_layer(struct ib_device *device,
- u8 port_num);
+ u32 port_num);
int usnic_ib_query_device(struct ib_device *ibdev,
struct ib_device_attr *props,
struct ib_udata *uhw);
-int usnic_ib_query_port(struct ib_device *ibdev, u8 port,
+int usnic_ib_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props);
int usnic_ib_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
int qp_attr_mask,
struct ib_qp_init_attr *qp_init_attr);
-int usnic_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
+int usnic_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
union ib_gid *gid);
int usnic_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata);
int usnic_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata);