diff options
Diffstat (limited to 'include/rdma/ib_user_mad.h')
| -rw-r--r-- | include/rdma/ib_user_mad.h | 70 |
1 files changed, 69 insertions, 1 deletions
diff --git a/include/rdma/ib_user_mad.h b/include/rdma/ib_user_mad.h index d66b15ea82c..29d2c7205a9 100644 --- a/include/rdma/ib_user_mad.h +++ b/include/rdma/ib_user_mad.h @@ -52,7 +52,50 @@ */ /** + * ib_user_mad_hdr_old - Old version of MAD packet header without pkey_index + * @id - ID of agent MAD received with/to be sent with + * @status - 0 on successful receive, ETIMEDOUT if no response + * received (transaction ID in data[] will be set to TID of original + * request) (ignored on send) + * @timeout_ms - Milliseconds to wait for response (unset on receive) + * @retries - Number of automatic retries to attempt + * @qpn - Remote QP number received from/to be sent to + * @qkey - Remote Q_Key to be sent with (unset on receive) + * @lid - Remote lid received from/to be sent to + * @sl - Service level received with/to be sent with + * @path_bits - Local path bits received with/to be sent with + * @grh_present - If set, GRH was received/should be sent + * @gid_index - Local GID index to send with (unset on receive) + * @hop_limit - Hop limit in GRH + * @traffic_class - Traffic class in GRH + * @gid - Remote GID in GRH + * @flow_label - Flow label in GRH + */ +struct ib_user_mad_hdr_old { + __u32 id; + __u32 status; + __u32 timeout_ms; + __u32 retries; + __u32 length; + __be32 qpn; + __be32 qkey; + __be16 lid; + __u8 sl; + __u8 path_bits; + __u8 grh_present; + __u8 gid_index; + __u8 hop_limit; + __u8 traffic_class; + __u8 gid[16]; + __be32 flow_label; +}; + +/** * ib_user_mad_hdr - MAD packet header + * This layout allows specifying/receiving the P_Key index. To use + * this capability, an application must call the + * IB_USER_MAD_ENABLE_PKEY ioctl on the user MAD file handle before + * any other actions with the file handle. * @id - ID of agent MAD received with/to be sent with * @status - 0 on successful receive, ETIMEDOUT if no response * received (transaction ID in data[] will be set to TID of original @@ -70,6 +113,7 @@ * @traffic_class - Traffic class in GRH * @gid - Remote GID in GRH * @flow_label - Flow label in GRH + * @pkey_index - P_Key index */ struct ib_user_mad_hdr { __u32 id; @@ -88,6 +132,8 @@ struct ib_user_mad_hdr { __u8 traffic_class; __u8 gid[16]; __be32 flow_label; + __u16 pkey_index; + __u8 reserved[6]; }; /** @@ -101,6 +147,26 @@ struct ib_user_mad { __u64 data[0]; }; +/* + * Earlier versions of this interface definition declared the + * method_mask[] member as an array of __u32 but treated it as a + * bitmap made up of longs in the kernel. This ambiguity meant that + * 32-bit big-endian applications that can run on both 32-bit and + * 64-bit kernels had no consistent ABI to rely on, and 64-bit + * big-endian applications that treated method_mask as being made up + * of 32-bit words would have their bitmap misinterpreted. + * + * To clear up this confusion, we change the declaration of + * method_mask[] to use unsigned long and handle the conversion from + * 32-bit userspace to 64-bit kernel for big-endian systems in the + * compat_ioctl method. Unfortunately, to keep the structure layout + * the same, we need the method_mask[] array to be aligned only to 4 + * bytes even when long is 64 bits, which forces us into this ugly + * typedef. + */ +typedef unsigned long __attribute__((aligned(4))) packed_ulong; +#define IB_USER_MAD_LONGS_PER_METHOD_MASK (128 / (8 * sizeof (long))) + /** * ib_user_mad_reg_req - MAD registration request * @id - Set by the kernel; used to identify agent in future requests. @@ -119,7 +185,7 @@ struct ib_user_mad { */ struct ib_user_mad_reg_req { __u32 id; - __u32 method_mask[4]; + packed_ulong method_mask[IB_USER_MAD_LONGS_PER_METHOD_MASK]; __u8 qpn; __u8 mgmt_class; __u8 mgmt_class_version; @@ -134,4 +200,6 @@ struct ib_user_mad_reg_req { #define IB_USER_MAD_UNREGISTER_AGENT _IOW(IB_IOCTL_MAGIC, 2, __u32) +#define IB_USER_MAD_ENABLE_PKEY _IO(IB_IOCTL_MAGIC, 3) + #endif /* IB_USER_MAD_H */ |