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IB: Add ib_init_ah_from_wc()

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Add a function to initialize address handle attributes from a work
completion.  This functionality is duplicated by both verbs and the CM.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty 2006-06-17 20:37:39 -07:00 committed by Roland Dreier
parent 75af908851
commit 4e00d69454
2 changed files with 42 additions and 16 deletions
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44
drivers/infiniband/core/verbs.c
View File

@ -125,35 +125,47 @@ struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
} }
EXPORT_SYMBOL(ib_create_ah); EXPORT_SYMBOL(ib_create_ah);
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc, int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
struct ib_grh *grh, u8 port_num) struct ib_grh *grh, struct ib_ah_attr *ah_attr)
{ {
struct ib_ah_attr ah_attr;
u32 flow_class; u32 flow_class;
u16 gid_index; u16 gid_index;
int ret; int ret;
memset(&ah_attr, 0, sizeof ah_attr); memset(ah_attr, 0, sizeof *ah_attr);
ah_attr.dlid = wc->slid; ah_attr->dlid = wc->slid;
ah_attr.sl = wc->sl; ah_attr->sl = wc->sl;
ah_attr.src_path_bits = wc->dlid_path_bits; ah_attr->src_path_bits = wc->dlid_path_bits;
ah_attr.port_num = port_num; ah_attr->port_num = port_num;
if (wc->wc_flags & IB_WC_GRH) { if (wc->wc_flags & IB_WC_GRH) {
ah_attr.ah_flags = IB_AH_GRH; ah_attr->ah_flags = IB_AH_GRH;
ah_attr.grh.dgid = grh->sgid; ah_attr->grh.dgid = grh->sgid;
ret = ib_find_cached_gid(pd->device, &grh->dgid, &port_num, ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
&gid_index); &gid_index);
if (ret) if (ret)
return ERR_PTR(ret); return ret;
ah_attr.grh.sgid_index = (u8) gid_index; ah_attr->grh.sgid_index = (u8) gid_index;
flow_class = be32_to_cpu(grh->version_tclass_flow); flow_class = be32_to_cpu(grh->version_tclass_flow);
ah_attr.grh.flow_label = flow_class & 0xFFFFF; ah_attr->grh.flow_label = flow_class & 0xFFFFF;
ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF; ah_attr->grh.hop_limit = grh->hop_limit;
ah_attr.grh.hop_limit = grh->hop_limit; ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
} }
return 0;
}
EXPORT_SYMBOL(ib_init_ah_from_wc);
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
struct ib_grh *grh, u8 port_num)
{
struct ib_ah_attr ah_attr;
int ret;
ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
if (ret)
return ERR_PTR(ret);
return ib_create_ah(pd, &ah_attr); return ib_create_ah(pd, &ah_attr);
} }

14
include/rdma/ib_verbs.h
View File

@ -1087,6 +1087,20 @@ int ib_dealloc_pd(struct ib_pd *pd);
*/ */
struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr); struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
/**
* ib_init_ah_from_wc - Initializes address handle attributes from a
* work completion.
* @device: Device on which the received message arrived.
* @port_num: Port on which the received message arrived.
* @wc: Work completion associated with the received message.
* @grh: References the received global route header. This parameter is
* ignored unless the work completion indicates that the GRH is valid.
* @ah_attr: Returned attributes that can be used when creating an address
* handle for replying to the message.
*/
int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
struct ib_grh *grh, struct ib_ah_attr *ah_attr);
/** /**
* ib_create_ah_from_wc - Creates an address handle associated with the * ib_create_ah_from_wc - Creates an address handle associated with the
* sender of the specified work completion. * sender of the specified work completion.