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IB/mad: Enhance SMI for switch support

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Extend the SMI with switch (intermediate hop) support. Care has been
taken to ensure that the CA (and router) code paths are changed as
little as possible.

Signed-off-by: Suresh Shelvapille <suri@baymicrosystems.com>
Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Hal Rosenstock
2007-05-14 17:21:52 -04:00
committed by Roland Dreier
parent 71780f59e1
commit 1bae4dbf95
4 changed files with 72 additions and 15 deletions
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50
drivers/infiniband/core/mad.c
View File

@@ -675,10 +675,16 @@ static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv,
struct ib_mad_port_private *port_priv;
struct ib_mad_agent_private *recv_mad_agent = NULL;
struct ib_device *device = mad_agent_priv->agent.device;
u8 port_num = mad_agent_priv->agent.port_num;
u8 port_num;
struct ib_wc mad_wc;
struct ib_send_wr *send_wr = &mad_send_wr->send_wr;
if (device->node_type == RDMA_NODE_IB_SWITCH &&
smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
port_num = send_wr->wr.ud.port_num;
else
port_num = mad_agent_priv->agent.port_num;
/*
* Directed route handling starts if the initial LID routed part of
* a request or the ending LID routed part of a response is empty.
@@ -1839,6 +1845,7 @@ static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
struct ib_mad_private *recv, *response;
struct ib_mad_list_head *mad_list;
struct ib_mad_agent_private *mad_agent;
int port_num;
response = kmem_cache_alloc(ib_mad_cache, GFP_KERNEL);
if (!response)
@@ -1872,25 +1879,50 @@ static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
if (!validate_mad(&recv->mad.mad, qp_info->qp->qp_num))
goto out;
if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH)
port_num = wc->port_num;
else
port_num = port_priv->port_num;
if (recv->mad.mad.mad_hdr.mgmt_class ==
IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
enum smi_forward_action retsmi;
if (smi_handle_dr_smp_recv(&recv->mad.smp,
port_priv->device->node_type,
port_priv->port_num,
port_num,
port_priv->device->phys_port_cnt) ==
IB_SMI_DISCARD)
goto out;
if (smi_check_forward_dr_smp(&recv->mad.smp) == IB_SMI_LOCAL)
retsmi = smi_check_forward_dr_smp(&recv->mad.smp);
if (retsmi == IB_SMI_LOCAL)
goto local;
if (smi_handle_dr_smp_send(&recv->mad.smp,
port_priv->device->node_type,
port_priv->port_num) == IB_SMI_DISCARD)
goto out;
if (retsmi == IB_SMI_SEND) { /* don't forward */
if (smi_handle_dr_smp_send(&recv->mad.smp,
port_priv->device->node_type,
port_num) == IB_SMI_DISCARD)
goto out;
if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD)
goto out;
} else if (port_priv->device->node_type == RDMA_NODE_IB_SWITCH) {
/* forward case for switches */
memcpy(response, recv, sizeof(*response));
response->header.recv_wc.wc = &response->header.wc;
response->header.recv_wc.recv_buf.mad = &response->mad.mad;
response->header.recv_wc.recv_buf.grh = &response->grh;
if (!agent_send_response(&response->mad.mad,
&response->grh, wc,
port_priv->device,
smi_get_fwd_port(&recv->mad.smp),
qp_info->qp->qp_num))
response = NULL;
if (smi_check_local_smp(&recv->mad.smp, port_priv->device) == IB_SMI_DISCARD)
goto out;
}
}
local:
@@ -1919,7 +1951,7 @@ local:
agent_send_response(&response->mad.mad,
&recv->grh, wc,
port_priv->device,
port_priv->port_num,
port_num,
qp_info->qp->qp_num);
goto out;
}