Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/infiniband/core/agent.c b/drivers/infiniband/core/agent.c
new file mode 100644
index 000000000..f82b4260d
--- /dev/null
+++ b/drivers/infiniband/core/agent.c
@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2004, 2005 Mellanox Technologies Ltd.  All rights reserved.
+ * Copyright (c) 2004, 2005 Infinicon Corporation.  All rights reserved.
+ * Copyright (c) 2004, 2005 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2004, 2005 Topspin Corporation.  All rights reserved.
+ * Copyright (c) 2004-2007 Voltaire Corporation.  All rights reserved.
+ * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include "agent.h"
+#include "smi.h"
+#include "mad_priv.h"
+
+#define SPFX "ib_agent: "
+
+struct ib_agent_port_private {
+	struct list_head port_list;
+	struct ib_mad_agent *agent[2];
+};
+
+static DEFINE_SPINLOCK(ib_agent_port_list_lock);
+static LIST_HEAD(ib_agent_port_list);
+
+static struct ib_agent_port_private *
+__ib_get_agent_port(const struct ib_device *device, int port_num)
+{
+	struct ib_agent_port_private *entry;
+
+	list_for_each_entry(entry, &ib_agent_port_list, port_list) {
+		if (entry->agent[1]->device == device &&
+		    entry->agent[1]->port_num == port_num)
+			return entry;
+	}
+	return NULL;
+}
+
+static struct ib_agent_port_private *
+ib_get_agent_port(const struct ib_device *device, int port_num)
+{
+	struct ib_agent_port_private *entry;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
+	entry = __ib_get_agent_port(device, port_num);
+	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
+	return entry;
+}
+
+void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
+			 const struct ib_wc *wc, const struct ib_device *device,
+			 int port_num, int qpn, size_t resp_mad_len, bool opa)
+{
+	struct ib_agent_port_private *port_priv;
+	struct ib_mad_agent *agent;
+	struct ib_mad_send_buf *send_buf;
+	struct ib_ah *ah;
+	struct ib_mad_send_wr_private *mad_send_wr;
+
+	if (rdma_cap_ib_switch(device))
+		port_priv = ib_get_agent_port(device, 0);
+	else
+		port_priv = ib_get_agent_port(device, port_num);
+
+	if (!port_priv) {
+		dev_err(&device->dev, "Unable to find port agent\n");
+		return;
+	}
+
+	agent = port_priv->agent[qpn];
+	ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
+	if (IS_ERR(ah)) {
+		dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
+			PTR_ERR(ah));
+		return;
+	}
+
+	if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION)
+		resp_mad_len = IB_MGMT_MAD_SIZE;
+
+	send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
+				      IB_MGMT_MAD_HDR,
+				      resp_mad_len - IB_MGMT_MAD_HDR,
+				      GFP_KERNEL,
+				      mad_hdr->base_version);
+	if (IS_ERR(send_buf)) {
+		dev_err(&device->dev, "ib_create_send_mad error\n");
+		goto err1;
+	}
+
+	memcpy(send_buf->mad, mad_hdr, resp_mad_len);
+	send_buf->ah = ah;
+
+	if (rdma_cap_ib_switch(device)) {
+		mad_send_wr = container_of(send_buf,
+					   struct ib_mad_send_wr_private,
+					   send_buf);
+		mad_send_wr->send_wr.port_num = port_num;
+	}
+
+	if (ib_post_send_mad(send_buf, NULL)) {
+		dev_err(&device->dev, "ib_post_send_mad error\n");
+		goto err2;
+	}
+	return;
+err2:
+	ib_free_send_mad(send_buf);
+err1:
+	rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
+}
+
+static void agent_send_handler(struct ib_mad_agent *mad_agent,
+			       struct ib_mad_send_wc *mad_send_wc)
+{
+	rdma_destroy_ah(mad_send_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE);
+	ib_free_send_mad(mad_send_wc->send_buf);
+}
+
+int ib_agent_port_open(struct ib_device *device, int port_num)
+{
+	struct ib_agent_port_private *port_priv;
+	unsigned long flags;
+	int ret;
+
+	/* Create new device info */
+	port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
+	if (!port_priv) {
+		ret = -ENOMEM;
+		goto error1;
+	}
+
+	if (rdma_cap_ib_smi(device, port_num)) {
+		/* Obtain send only MAD agent for SMI QP */
+		port_priv->agent[0] = ib_register_mad_agent(device, port_num,
+							    IB_QPT_SMI, NULL, 0,
+							    &agent_send_handler,
+							    NULL, NULL, 0);
+		if (IS_ERR(port_priv->agent[0])) {
+			ret = PTR_ERR(port_priv->agent[0]);
+			goto error2;
+		}
+	}
+
+	/* Obtain send only MAD agent for GSI QP */
+	port_priv->agent[1] = ib_register_mad_agent(device, port_num,
+						    IB_QPT_GSI, NULL, 0,
+						    &agent_send_handler,
+						    NULL, NULL, 0);
+	if (IS_ERR(port_priv->agent[1])) {
+		ret = PTR_ERR(port_priv->agent[1]);
+		goto error3;
+	}
+
+	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;
+
+error3:
+	if (port_priv->agent[0])
+		ib_unregister_mad_agent(port_priv->agent[0]);
+error2:
+	kfree(port_priv);
+error1:
+	return ret;
+}
+
+int ib_agent_port_close(struct ib_device *device, int port_num)
+{
+	struct ib_agent_port_private *port_priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ib_agent_port_list_lock, flags);
+	port_priv = __ib_get_agent_port(device, port_num);
+	if (port_priv == NULL) {
+		spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
+		dev_err(&device->dev, "Port %d not found\n", port_num);
+		return -ENODEV;
+	}
+	list_del(&port_priv->port_list);
+	spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
+
+	ib_unregister_mad_agent(port_priv->agent[1]);
+	if (port_priv->agent[0])
+		ib_unregister_mad_agent(port_priv->agent[0]);
+
+	kfree(port_priv);
+	return 0;
+}