[PATCH] IB: Update MAD client API

Automatically allocate a MR when registering a MAD agent.
MAD clients are modified to use this updated API.
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>

drivers/infiniband/core/agent.c

@@ -134,7 +134,7 @@ static int agent_mad_send(struct ib_mad_agent *mad_agent,
 					  sizeof(mad_priv->mad),
 					  DMA_TO_DEVICE);
 	gather_list.length = sizeof(mad_priv->mad);
-	gather_list.lkey = (*port_priv->mr).lkey;
+	gather_list.lkey = mad_agent->mr->lkey;
 
 	send_wr.next = NULL;
 	send_wr.opcode = IB_WR_SEND;
@@ -322,22 +322,12 @@ int ib_agent_port_open(struct ib_device *device, int port_num)
 		goto error3;
 	}
 
-	port_priv->mr = ib_get_dma_mr(port_priv->smp_agent->qp->pd,
-				      IB_ACCESS_LOCAL_WRITE);
-	if (IS_ERR(port_priv->mr)) {
-		printk(KERN_ERR SPFX "Couldn't get DMA MR\n");
-		ret = PTR_ERR(port_priv->mr);
-		goto error4;
-	}
-
 	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
 	list_add_tail(&port_priv->port_list, &ib_agent_port_list);
 	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
 
 	return 0;
 
-error4:
-	ib_unregister_mad_agent(port_priv->perf_mgmt_agent);
 error3:
 	ib_unregister_mad_agent(port_priv->smp_agent);
 error2:
@@ -361,8 +351,6 @@ int ib_agent_port_close(struct ib_device *device, int port_num)
 	list_del(&port_priv->port_list);
 	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
 
-	ib_dereg_mr(port_priv->mr);
-
 	ib_unregister_mad_agent(port_priv->perf_mgmt_agent);
 	ib_unregister_mad_agent(port_priv->smp_agent);
 	kfree(port_priv);

drivers/infiniband/core/agent_priv.h

@@ -33,7 +33,7 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
- * $Id: agent_priv.h 1389 2004-12-27 22:56:47Z roland $
+ * $Id: agent_priv.h 1640 2005-01-24 22:39:02Z halr $
  */
 
 #ifndef __IB_AGENT_PRIV_H__
@@ -57,7 +57,6 @@ struct ib_agent_port_private {
 	int port_num;
 	struct ib_mad_agent *smp_agent;	      /* SM class */
 	struct ib_mad_agent *perf_mgmt_agent; /* PerfMgmt class */
-	struct ib_mr *mr;
 };
 
 #endif	/* __IB_AGENT_PRIV_H__ */

drivers/infiniband/core/mad.c

@@ -261,19 +261,26 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 		ret = ERR_PTR(-ENOMEM);
 		goto error1;
 	}
+	memset(mad_agent_priv, 0, sizeof *mad_agent_priv);
+
+	mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd,
+						 IB_ACCESS_LOCAL_WRITE);
+	if (IS_ERR(mad_agent_priv->agent.mr)) {
+		ret = ERR_PTR(-ENOMEM);
+		goto error2;
+	}
 
 	if (mad_reg_req) {
 		reg_req = kmalloc(sizeof *reg_req, GFP_KERNEL);
 		if (!reg_req) {
 			ret = ERR_PTR(-ENOMEM);
-			goto error2;
+			goto error3;
 		}
 		/* Make a copy of the MAD registration request */
 		memcpy(reg_req, mad_reg_req, sizeof *reg_req);
 	}
 
 	/* Now, fill in the various structures */
-	memset(mad_agent_priv, 0, sizeof *mad_agent_priv);
 	mad_agent_priv->qp_info = &port_priv->qp_info[qpn];
 	mad_agent_priv->reg_req = reg_req;
 	mad_agent_priv->rmpp_version = rmpp_version;
@@ -301,7 +308,7 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 				if (method) {
 					if (method_in_use(&method,
 							   mad_reg_req))
-						goto error3;
+						goto error4;
 				}
 			}
 			ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv,
@@ -317,14 +324,14 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 					if (is_vendor_method_in_use(
 							vendor_class,
 							mad_reg_req))
-						goto error3;
+						goto error4;
 				}
 			}
 			ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv);
 		}
 		if (ret2) {
 			ret = ERR_PTR(ret2);
-			goto error3;
+			goto error4;
 		}
 	}
 
@@ -346,11 +353,13 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
 
 	return &mad_agent_priv->agent;
 
-error3:
+error4:
 	spin_unlock_irqrestore(&port_priv->reg_lock, flags);
 	kfree(reg_req);
-error2:
+error3:
 	kfree(mad_agent_priv);
+error2:
+	ib_dereg_mr(mad_agent_priv->agent.mr);
 error1:
 	return ret;
 }
@@ -487,18 +496,15 @@ static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
 	 * MADs, preventing us from queuing additional work
 	 */
 	cancel_mads(mad_agent_priv);
-
 	port_priv = mad_agent_priv->qp_info->port_priv;
-
 	cancel_delayed_work(&mad_agent_priv->timed_work);
-	flush_workqueue(port_priv->wq);
 
 	spin_lock_irqsave(&port_priv->reg_lock, flags);
 	remove_mad_reg_req(mad_agent_priv);
 	list_del(&mad_agent_priv->agent_list);
 	spin_unlock_irqrestore(&port_priv->reg_lock, flags);
 
-	/* XXX: Cleanup pending RMPP receives for this agent */
+	flush_workqueue(port_priv->wq);
 
 	atomic_dec(&mad_agent_priv->refcount);
 	wait_event(mad_agent_priv->wait,
@@ -506,6 +512,7 @@ static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
 
 	if (mad_agent_priv->reg_req)
 		kfree(mad_agent_priv->reg_req);
+	ib_dereg_mr(mad_agent_priv->agent.mr);
 	kfree(mad_agent_priv);
 }
 

drivers/infiniband/core/sa_query.c

@@ -77,7 +77,6 @@ struct ib_sa_sm_ah {
 
 struct ib_sa_port {
 	struct ib_mad_agent *agent;
-	struct ib_mr        *mr;
 	struct ib_sa_sm_ah  *sm_ah;
 	struct work_struct   update_task;
 	spinlock_t           ah_lock;
@@ -492,7 +491,7 @@ static int send_mad(struct ib_sa_query *query, int timeout_ms)
 					    sizeof (struct ib_sa_mad),
 					    DMA_TO_DEVICE);
 	gather_list.length = sizeof (struct ib_sa_mad);
-	gather_list.lkey   = port->mr->lkey;
+	gather_list.lkey   = port->agent->mr->lkey;
 	pci_unmap_addr_set(query, mapping, gather_list.addr);
 
 	ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
@@ -780,7 +779,6 @@ static void ib_sa_add_one(struct ib_device *device)
 	sa_dev->end_port   = e;
 
 	for (i = 0; i <= e - s; ++i) {
-		sa_dev->port[i].mr       = NULL;
 		sa_dev->port[i].sm_ah    = NULL;
 		sa_dev->port[i].port_num = i + s;
 		spin_lock_init(&sa_dev->port[i].ah_lock);
@@ -792,13 +790,6 @@ static void ib_sa_add_one(struct ib_device *device)
 		if (IS_ERR(sa_dev->port[i].agent))
 			goto err;
 
-		sa_dev->port[i].mr = ib_get_dma_mr(sa_dev->port[i].agent->qp->pd,
-						   IB_ACCESS_LOCAL_WRITE);
-		if (IS_ERR(sa_dev->port[i].mr)) {
-			ib_unregister_mad_agent(sa_dev->port[i].agent);
-			goto err;
-		}
-
 		INIT_WORK(&sa_dev->port[i].update_task,
 			  update_sm_ah, &sa_dev->port[i]);
 	}
@@ -822,10 +813,8 @@ static void ib_sa_add_one(struct ib_device *device)
 	return;
 
 err:
-	while (--i >= 0) {
-		ib_dereg_mr(sa_dev->port[i].mr);
+	while (--i >= 0)
 		ib_unregister_mad_agent(sa_dev->port[i].agent);
-	}
 
 	kfree(sa_dev);
 

drivers/infiniband/include/ib_mad.h

@@ -180,6 +180,7 @@ typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
 struct ib_mad_agent {
 	struct ib_device	*device;
 	struct ib_qp		*qp;
+	struct ib_mr		*mr;
 	ib_mad_recv_handler	recv_handler;
 	ib_mad_send_handler	send_handler;
 	ib_mad_snoop_handler	snoop_handler;