Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 193 insertions, 0 deletions

diff --git a/drivers/infiniband/sw/rdmavt/ah.c b/drivers/infiniband/sw/rdmavt/ah.c
new file mode 100644
index 000000000..084bb4bae
--- /dev/null
+++ b/drivers/infiniband/sw/rdmavt/ah.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright(c) 2016 Intel Corporation.
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * 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.
+ *  - Neither the name of Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/slab.h>
+#include "ah.h"
+#include "vt.h" /* for prints */
+
+/**
+ * rvt_check_ah - validate the attributes of AH
+ * @ibdev: the ib device
+ * @ah_attr: the attributes of the AH
+ *
+ * If driver supports a more detailed check_ah function call back to it
+ * otherwise just check the basics.
+ *
+ * Return: 0 on success
+ */
+int rvt_check_ah(struct ib_device *ibdev,
+		 struct rdma_ah_attr *ah_attr)
+{
+	int err;
+	int port_num = rdma_ah_get_port_num(ah_attr);
+	struct ib_port_attr port_attr;
+	struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+	u8 ah_flags = rdma_ah_get_ah_flags(ah_attr);
+	u8 static_rate = rdma_ah_get_static_rate(ah_attr);
+
+	err = ib_query_port(ibdev, port_num, &port_attr);
+	if (err)
+		return -EINVAL;
+	if (port_num < 1 ||
+	    port_num > ibdev->phys_port_cnt)
+		return -EINVAL;
+	if (static_rate != IB_RATE_PORT_CURRENT &&
+	    ib_rate_to_mbps(static_rate) < 0)
+		return -EINVAL;
+	if ((ah_flags & IB_AH_GRH) &&
+	    rdma_ah_read_grh(ah_attr)->sgid_index >= port_attr.gid_tbl_len)
+		return -EINVAL;
+	if (rdi->driver_f.check_ah)
+		return rdi->driver_f.check_ah(ibdev, ah_attr);
+	return 0;
+}
+EXPORT_SYMBOL(rvt_check_ah);
+
+/**
+ * rvt_create_ah - create an address handle
+ * @pd: the protection domain
+ * @ah_attr: the attributes of the AH
+ * @udata: pointer to user's input output buffer information.
+ *
+ * This may be called from interrupt context.
+ *
+ * Return: newly allocated ah
+ */
+struct ib_ah *rvt_create_ah(struct ib_pd *pd,
+			    struct rdma_ah_attr *ah_attr,
+			    struct ib_udata *udata)
+{
+	struct rvt_ah *ah;
+	struct rvt_dev_info *dev = ib_to_rvt(pd->device);
+	unsigned long flags;
+
+	if (rvt_check_ah(pd->device, ah_attr))
+		return ERR_PTR(-EINVAL);
+
+	ah = kmalloc(sizeof(*ah), GFP_ATOMIC);
+	if (!ah)
+		return ERR_PTR(-ENOMEM);
+
+	spin_lock_irqsave(&dev->n_ahs_lock, flags);
+	if (dev->n_ahs_allocated == dev->dparms.props.max_ah) {
+		spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+		kfree(ah);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	dev->n_ahs_allocated++;
+	spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+	rdma_copy_ah_attr(&ah->attr, ah_attr);
+
+	atomic_set(&ah->refcount, 0);
+
+	if (dev->driver_f.notify_new_ah)
+		dev->driver_f.notify_new_ah(pd->device, ah_attr, ah);
+
+	return &ah->ibah;
+}
+
+/**
+ * rvt_destory_ah - Destory an address handle
+ * @ibah: address handle
+ *
+ * Return: 0 on success
+ */
+int rvt_destroy_ah(struct ib_ah *ibah)
+{
+	struct rvt_dev_info *dev = ib_to_rvt(ibah->device);
+	struct rvt_ah *ah = ibah_to_rvtah(ibah);
+	unsigned long flags;
+
+	if (atomic_read(&ah->refcount) != 0)
+		return -EBUSY;
+
+	spin_lock_irqsave(&dev->n_ahs_lock, flags);
+	dev->n_ahs_allocated--;
+	spin_unlock_irqrestore(&dev->n_ahs_lock, flags);
+
+	rdma_destroy_ah_attr(&ah->attr);
+	kfree(ah);
+
+	return 0;
+}
+
+/**
+ * rvt_modify_ah - modify an ah with given attrs
+ * @ibah: address handle to modify
+ * @ah_attr: attrs to apply
+ *
+ * Return: 0 on success
+ */
+int rvt_modify_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
+{
+	struct rvt_ah *ah = ibah_to_rvtah(ibah);
+
+	if (rvt_check_ah(ibah->device, ah_attr))
+		return -EINVAL;
+
+	ah->attr = *ah_attr;
+
+	return 0;
+}
+
+/**
+ * rvt_query_ah - return attrs for ah
+ * @ibah: address handle to query
+ * @ah_attr: return info in this
+ *
+ * Return: always 0
+ */
+int rvt_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr)
+{
+	struct rvt_ah *ah = ibah_to_rvtah(ibah);
+
+	*ah_attr = ah->attr;
+
+	return 0;
+}