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RDMA/efa: Expose RDMA read related attributes

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Query the device attributes for RDMA operations, including maximum
transfer size and maximum number of SGEs per RDMA WR, and report them
back to the userspace library.

Link: https://lore.kernel.org/r/20191121141509.59297-4-galpress@amazon.com
Signed-off-by: Daniel Kranzdorf <dkkranzd@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Daniel Kranzdorf
2019-11-21 16:15:09 +02:00
committed by Jason Gunthorpe
parent e6c4f3ff43
commit 666e8ff535
5 changed files with 46 additions and 5 deletions
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6
include/uapi/rdma/efa-abi.h
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@@ -90,12 +90,18 @@ struct efa_ibv_create_ah_resp {
__u8 reserved_30[2];
};
enum {
EFA_QUERY_DEVICE_CAPS_RDMA_READ = 1 << 0,
};
struct efa_ibv_ex_query_device_resp {
__u32 comp_mask;
__u32 max_sq_wr;
__u32 max_rq_wr;
__u16 max_sq_sge;
__u16 max_rq_sge;
__u32 max_rdma_size;
__u32 device_caps;
};
#endif /* EFA_ABI_USER_H */