Commit 513789ed authored by Hal Rosenstock's avatar Hal Rosenstock Committed by Linus Torvalds
Browse files

[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: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarHal Rosenstock <halr@voltaire.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent cabe3cbc
......@@ -41,6 +41,7 @@
#include <linux/err.h>
#include <ib_verbs.h>
#include <ib_cache.h>
/* Protection domains */
......@@ -88,6 +89,40 @@ struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
}
EXPORT_SYMBOL(ib_create_ah);
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;
u32 flow_class;
u16 gid_index;
int ret;
memset(&ah_attr, 0, sizeof ah_attr);
ah_attr.dlid = wc->slid;
ah_attr.sl = wc->sl;
ah_attr.src_path_bits = wc->dlid_path_bits;
ah_attr.port_num = port_num;
if (wc->wc_flags & IB_WC_GRH) {
ah_attr.ah_flags = IB_AH_GRH;
ah_attr.grh.dgid = grh->dgid;
ret = ib_find_cached_gid(pd->device, &grh->sgid, &port_num,
&gid_index);
if (ret)
return ERR_PTR(ret);
ah_attr.grh.sgid_index = (u8) gid_index;
flow_class = be32_to_cpu(&grh->version_tclass_flow);
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;
}
return ib_create_ah(pd, &ah_attr);
}
EXPORT_SYMBOL(ib_create_ah_from_wc);
int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
{
return ah->device->modify_ah ?
......
......@@ -77,15 +77,6 @@
#define IB_QP1_QKEY 0x80010000
#define IB_QP_SET_QKEY 0x80000000
struct ib_grh {
u32 version_tclass_flow;
u16 paylen;
u8 next_hdr;
u8 hop_limit;
union ib_gid sgid;
union ib_gid dgid;
} __attribute__ ((packed));
struct ib_mad_hdr {
u8 base_version;
u8 mgmt_class;
......
......@@ -289,6 +289,15 @@ struct ib_global_route {
u8 traffic_class;
};
struct ib_grh {
u32 version_tclass_flow;
u16 paylen;
u8 next_hdr;
u8 hop_limit;
union ib_gid sgid;
union ib_gid dgid;
};
enum {
IB_MULTICAST_QPN = 0xffffff
};
......@@ -990,6 +999,21 @@ int ib_dealloc_pd(struct ib_pd *pd);
*/
struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
/**
* ib_create_ah_from_wc - Creates an address handle associated with the
* sender of the specified work completion.
* @pd: The protection domain associated with the address handle.
* @wc: Work completion information associated with a received message.
* @grh: References the received global route header. This parameter is
* ignored unless the work completion indicates that the GRH is valid.
* @port_num: The outbound port number to associate with the address.
*
* The address handle is used to reference a local or global destination
* in all UD QP post sends.
*/
struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
struct ib_grh *grh, u8 port_num);
/**
* ib_modify_ah - Modifies the address vector associated with an address
* handle.
......
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