diff options
Diffstat (limited to 'drivers/infiniband/core/smi.c')
| -rw-r--r-- | drivers/infiniband/core/smi.c | 80 |
1 files changed, 46 insertions, 34 deletions
diff --git a/drivers/infiniband/core/smi.c b/drivers/infiniband/core/smi.c index e6c6810c8c41..b6dedc0918fe 100644 --- a/drivers/infiniband/core/smi.c +++ b/drivers/infiniband/core/smi.c @@ -39,84 +39,80 @@ #include <rdma/ib_smi.h> #include "smi.h" -/* - * Fixup a directed route SMP for sending - * Return IB_SMI_DISCARD if the SMP should be discarded - */ -enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp, - u8 node_type, int port_num) +static enum smi_action __smi_handle_dr_smp_send(u8 node_type, int port_num, + u8 *hop_ptr, u8 hop_cnt, + const u8 *initial_path, + const u8 *return_path, + u8 direction, + bool dr_dlid_is_permissive, + bool dr_slid_is_permissive) { - u8 hop_ptr, hop_cnt; - - hop_ptr = smp->hop_ptr; - hop_cnt = smp->hop_cnt; - /* See section 14.2.2.2, Vol 1 IB spec */ /* C14-6 -- valid hop_cnt values are from 0 to 63 */ if (hop_cnt >= IB_SMP_MAX_PATH_HOPS) return IB_SMI_DISCARD; - if (!ib_get_smp_direction(smp)) { + if (!direction) { /* C14-9:1 */ - if (hop_cnt && hop_ptr == 0) { - smp->hop_ptr++; - return (smp->initial_path[smp->hop_ptr] == + if (hop_cnt && *hop_ptr == 0) { + (*hop_ptr)++; + return (initial_path[*hop_ptr] == port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-9:2 */ - if (hop_ptr && hop_ptr < hop_cnt) { + if (*hop_ptr && *hop_ptr < hop_cnt) { if (node_type != RDMA_NODE_IB_SWITCH) return IB_SMI_DISCARD; - /* smp->return_path set when received */ - smp->hop_ptr++; - return (smp->initial_path[smp->hop_ptr] == + /* return_path set when received */ + (*hop_ptr)++; + return (initial_path[*hop_ptr] == port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-9:3 -- We're at the end of the DR segment of path */ - if (hop_ptr == hop_cnt) { - /* smp->return_path set when received */ - smp->hop_ptr++; + if (*hop_ptr == hop_cnt) { + /* return_path set when received */ + (*hop_ptr)++; return (node_type == RDMA_NODE_IB_SWITCH || - smp->dr_dlid == IB_LID_PERMISSIVE ? + dr_dlid_is_permissive ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-9:4 -- hop_ptr = hop_cnt + 1 -> give to SMA/SM */ /* C14-9:5 -- Fail unreasonable hop pointer */ - return (hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD); + return (*hop_ptr == hop_cnt + 1 ? IB_SMI_HANDLE : IB_SMI_DISCARD); } else { /* C14-13:1 */ - if (hop_cnt && hop_ptr == hop_cnt + 1) { - smp->hop_ptr--; - return (smp->return_path[smp->hop_ptr] == + if (hop_cnt && *hop_ptr == hop_cnt + 1) { + (*hop_ptr)--; + return (return_path[*hop_ptr] == port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-13:2 */ - if (2 <= hop_ptr && hop_ptr <= hop_cnt) { + if (2 <= *hop_ptr && *hop_ptr <= hop_cnt) { if (node_type != RDMA_NODE_IB_SWITCH) return IB_SMI_DISCARD; - smp->hop_ptr--; - return (smp->return_path[smp->hop_ptr] == + (*hop_ptr)--; + return (return_path[*hop_ptr] == port_num ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-13:3 -- at the end of the DR segment of path */ - if (hop_ptr == 1) { - smp->hop_ptr--; + if (*hop_ptr == 1) { + (*hop_ptr)--; /* C14-13:3 -- SMPs destined for SM shouldn't be here */ return (node_type == RDMA_NODE_IB_SWITCH || - smp->dr_slid == IB_LID_PERMISSIVE ? + dr_slid_is_permissive ? IB_SMI_HANDLE : IB_SMI_DISCARD); } /* C14-13:4 -- hop_ptr = 0 -> should have gone to SM */ - if (hop_ptr == 0) + if (*hop_ptr == 0) return IB_SMI_HANDLE; /* C14-13:5 -- Check for unreasonable hop pointer */ @@ -125,6 +121,22 @@ enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp, } /* + * Fixup a directed route SMP for sending + * Return IB_SMI_DISCARD if the SMP should be discarded + */ +enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp, + u8 node_type, int port_num) +{ + return __smi_handle_dr_smp_send(node_type, port_num, + &smp->hop_ptr, smp->hop_cnt, + smp->initial_path, + smp->return_path, + ib_get_smp_direction(smp), + smp->dr_dlid == IB_LID_PERMISSIVE, + smp->dr_slid == IB_LID_PERMISSIVE); +} + +/* * Adjust information for a received SMP * Return IB_SMI_DISCARD if the SMP should be dropped */ |