[PATCH] IB: Add ib_create_ah_from_wc to IB verbs
Added new call: ib_create_ah_from_wc. Call will allocate an address handle given work completion information, including any received GRH. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Hal Rosenstock <halr@voltaire.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -41,6 +41,7 @@
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#include <linux/err.h>
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#include <ib_verbs.h>
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#include <ib_cache.h>
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/* Protection domains */
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@ -88,6 +89,40 @@ struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
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}
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EXPORT_SYMBOL(ib_create_ah);
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struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
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struct ib_grh *grh, u8 port_num)
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{
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struct ib_ah_attr ah_attr;
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u32 flow_class;
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u16 gid_index;
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int ret;
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = wc->slid;
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ah_attr.sl = wc->sl;
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ah_attr.src_path_bits = wc->dlid_path_bits;
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ah_attr.port_num = port_num;
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if (wc->wc_flags & IB_WC_GRH) {
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ah_attr.ah_flags = IB_AH_GRH;
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ah_attr.grh.dgid = grh->dgid;
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ret = ib_find_cached_gid(pd->device, &grh->sgid, &port_num,
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&gid_index);
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if (ret)
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return ERR_PTR(ret);
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ah_attr.grh.sgid_index = (u8) gid_index;
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flow_class = be32_to_cpu(&grh->version_tclass_flow);
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ah_attr.grh.flow_label = flow_class & 0xFFFFF;
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ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
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ah_attr.grh.hop_limit = grh->hop_limit;
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}
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return ib_create_ah(pd, &ah_attr);
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}
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EXPORT_SYMBOL(ib_create_ah_from_wc);
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int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
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{
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return ah->device->modify_ah ?
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@ -77,15 +77,6 @@
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#define IB_QP1_QKEY 0x80010000
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#define IB_QP_SET_QKEY 0x80000000
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struct ib_grh {
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u32 version_tclass_flow;
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u16 paylen;
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u8 next_hdr;
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u8 hop_limit;
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union ib_gid sgid;
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union ib_gid dgid;
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} __attribute__ ((packed));
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struct ib_mad_hdr {
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u8 base_version;
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u8 mgmt_class;
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@ -289,6 +289,15 @@ struct ib_global_route {
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u8 traffic_class;
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};
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struct ib_grh {
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u32 version_tclass_flow;
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u16 paylen;
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u8 next_hdr;
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u8 hop_limit;
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union ib_gid sgid;
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union ib_gid dgid;
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};
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enum {
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IB_MULTICAST_QPN = 0xffffff
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};
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@ -990,6 +999,21 @@ int ib_dealloc_pd(struct ib_pd *pd);
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*/
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struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
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/**
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* ib_create_ah_from_wc - Creates an address handle associated with the
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* sender of the specified work completion.
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* @pd: The protection domain associated with the address handle.
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* @wc: Work completion information associated with a received message.
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* @grh: References the received global route header. This parameter is
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* ignored unless the work completion indicates that the GRH is valid.
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* @port_num: The outbound port number to associate with the address.
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*
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* The address handle is used to reference a local or global destination
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* in all UD QP post sends.
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*/
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struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
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struct ib_grh *grh, u8 port_num);
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/**
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* ib_modify_ah - Modifies the address vector associated with an address
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* handle.
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