Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=727792da2bc22e2ce125faef84aeca3b3e2f4a90
Commit: 727792da2bc22e2ce125faef84aeca3b3e2f4a90
Parent: f9b403532235520ec248c024f621efcaf6ba7b93
Author: Steve Welch <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 23 15:06:10 2007 -0700
Committer: Roland Dreier <[EMAIL PROTECTED]>
CommitDate: Fri Jan 25 14:15:25 2008 -0800
IB/mad: Enable loopback of DR SMP responses from userspace
The local loopback of an outgoing DR SMP response is limited to those
that originate at the driver specific SMA implementation during the
driver specific process_mad() function. This patch enables a
returning DR SMP originating in userspace (or elsewhere) to be
delivered to the local managment stack. In this specific case the
driver process_mad() function does not consume or process the MAD, so
a reponse mad has not be created and the original MAD must manually be
copied to the MAD buffer that is to be handed off to the local agent.
Signed-off-by: Steve Welch <[EMAIL PROTECTED]>
Acked-by: Hal Rosenstock <[EMAIL PROTECTED]>
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
---
drivers/infiniband/core/mad.c | 6 +++---
drivers/infiniband/core/smi.h | 18 +++++++++++++++++-
2 files changed, 20 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index f82900d..649335a 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -701,7 +701,8 @@ static int handle_outgoing_dr_smp(struct
ib_mad_agent_private *mad_agent_priv,
}
/* Check to post send on QP or process locally */
- if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD)
+ if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD &&
+ smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD)
goto out;
local = kmalloc(sizeof *local, GFP_ATOMIC);
@@ -752,8 +753,7 @@ static int handle_outgoing_dr_smp(struct
ib_mad_agent_private *mad_agent_priv,
port_priv = ib_get_mad_port(mad_agent_priv->agent.device,
mad_agent_priv->agent.port_num);
if (port_priv) {
- mad_priv->mad.mad.mad_hdr.tid =
- ((struct ib_mad *)smp)->mad_hdr.tid;
+ memcpy(&mad_priv->mad.mad, smp, sizeof(struct ib_mad));
recv_mad_agent = find_mad_agent(port_priv,
&mad_priv->mad.mad);
}
diff --git a/drivers/infiniband/core/smi.h b/drivers/infiniband/core/smi.h
index 1cfc298..aff96ba 100644
--- a/drivers/infiniband/core/smi.h
+++ b/drivers/infiniband/core/smi.h
@@ -59,7 +59,8 @@ extern enum smi_action smi_handle_dr_smp_send(struct ib_smp
*smp,
u8 node_type, int port_num);
/*
- * Return 1 if the SMP should be handled by the local SMA/SM via process_mad
+ * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
+ * via process_mad
*/
static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
struct ib_device *device)
@@ -71,4 +72,19 @@ static inline enum smi_action smi_check_local_smp(struct
ib_smp *smp,
(smp->hop_ptr == smp->hop_cnt + 1)) ?
IB_SMI_HANDLE : IB_SMI_DISCARD);
}
+
+/*
+ * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
+ * via process_mad
+ */
+static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
+ struct ib_device *device)
+{
+ /* C14-13:3 -- We're at the end of the DR segment of path */
+ /* C14-13:4 -- Hop Pointer == 0 -> give to SM */
+ return ((device->process_mad &&
+ ib_get_smp_direction(smp) &&
+ !smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
+}
+
#endif /* __SMI_H_ */
-
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