IB/hfi1: Optimize packet type comparison using 9B and bypass code paths
The packet type comparison used to find out if a packet is a bypass packet in the hot path is an expensive operation as seen in a profile. Determine packet's pkey and migration bit through the bypass and 9B code paths instead. Reviewed-by: Don Hiatt <don.hiatt@intel.com> Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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Jason Gunthorpe

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@@ -405,6 +405,11 @@ static inline void cacheless_memcpy(void *dst, void *src, size_t n)
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__copy_user_nocache(dst, (void __user *)src, n, 0);
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}
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static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
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{
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return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
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}
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extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
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extern const u8 hdr_len_by_opcode[];
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