diff options
| author | Parav Pandit <parav@nvidia.com> | 2021-02-03 15:01:32 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-02-05 12:06:01 -0400 |
| commit | 7416790e22452bfa86de6b55638eacf7780c8f6f (patch) | |
| tree | f2c25ff63ff525be7f287bc77906beb0c1b49632 /drivers/infiniband/core/device.c | |
| parent | 7a58779edd75c37352917e8fbc7769efce0e65b6 (diff) | |
RDMA/core: Introduce and use API to read port immutable data
Currently mlx5 driver caches port GID table length for 2 ports. It is
also cached by IB core as port immutable data.
When mlx5 representor ports are present, which are usually more than 2,
invalid access to port_caps array can happen while validating the GID
table length which is only for 2 ports.
To avoid this, take help of the IB cores port immutable data by exposing
an API to read the port immutable fields.
Remove mlx5 driver's internal cache, thereby reduce code and data.
Link: https://lore.kernel.org/r/20210203130133.4057329-5-leon@kernel.org
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/device.c')
| -rw-r--r-- | drivers/infiniband/core/device.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index c895d7bfa512..051c018fb73c 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -848,6 +848,20 @@ static int setup_port_data(struct ib_device *device) return 0; } +/** + * ib_port_immutable_read() - Read rdma port's immutable data + * @dev - IB device + * @port - port number whose immutable data to read. It starts with index 1 and + * valid upto including rdma_end_port(). + */ +const struct ib_port_immutable* +ib_port_immutable_read(struct ib_device *dev, unsigned int port) +{ + WARN_ON(!rdma_is_port_valid(dev, port)); + return &dev->port_data[port].immutable; +} +EXPORT_SYMBOL(ib_port_immutable_read); + void ib_get_device_fw_str(struct ib_device *dev, char *str) { if (dev->ops.get_dev_fw_str) |