IB/hns: Add driver files for hns RoCE driver

These are the various new source code files for the Hisilicon
RoCE driver for ARM architecture.

Signed-off-by: Wei Hu <xavier.huwei@huawei.com>
Signed-off-by: Nenglong Zhao <zhaonenglong@hisilicon.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 128 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c b/drivers/infiniband/hw/hns/hns_roce_ah.c
new file mode 100644
index 000000000000..24f79ee39fdf
--- /dev/null
+++ b/drivers/infiniband/hw/hns/hns_roce_ah.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2016 Hisilicon Limited.
+ *
+ * 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/platform_device.h>
+#include <rdma/ib_addr.h>
+#include <rdma/ib_cache.h>
+#include "hns_roce_device.h"
+
+#define HNS_ROCE_PORT_NUM_SHIFT		24
+#define HNS_ROCE_VLAN_SL_BIT_MASK	7
+#define HNS_ROCE_VLAN_SL_SHIFT		13
+
+struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *ah_attr)
+{
+	struct hns_roce_dev *hr_dev = to_hr_dev(ibpd->device);
+	struct device *dev = &hr_dev->pdev->dev;
+	struct ib_gid_attr gid_attr;
+	struct hns_roce_ah *ah;
+	u16 vlan_tag = 0xffff;
+	struct in6_addr in6;
+	union ib_gid sgid;
+	int ret;
+
+	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
+	if (!ah)
+		return ERR_PTR(-ENOMEM);
+
+	/* Get mac address */
+	memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(ah_attr->grh.dgid.raw));
+	if (rdma_is_multicast_addr(&in6))
+		rdma_get_mcast_mac(&in6, ah->av.mac);
+	else
+		memcpy(ah->av.mac, ah_attr->dmac, sizeof(ah_attr->dmac));
+
+	/* Get source gid */
+	ret = ib_get_cached_gid(ibpd->device, ah_attr->port_num,
+				ah_attr->grh.sgid_index, &sgid, &gid_attr);
+	if (ret) {
+		dev_err(dev, "get sgid failed! ret = %d\n", ret);
+		kfree(ah);
+		return ERR_PTR(ret);
+	}
+
+	if (gid_attr.ndev) {
+		if (is_vlan_dev(gid_attr.ndev))
+			vlan_tag = vlan_dev_vlan_id(gid_attr.ndev);
+		dev_put(gid_attr.ndev);
+	}
+
+	if (vlan_tag < 0x1000)
+		vlan_tag |= (ah_attr->sl & HNS_ROCE_VLAN_SL_BIT_MASK) <<
+			     HNS_ROCE_VLAN_SL_SHIFT;
+
+	ah->av.port_pd = cpu_to_be32(to_hr_pd(ibpd)->pdn | (ah_attr->port_num <<
+				     HNS_ROCE_PORT_NUM_SHIFT));
+	ah->av.gid_index = ah_attr->grh.sgid_index;
+	ah->av.vlan = cpu_to_le16(vlan_tag);
+	dev_dbg(dev, "gid_index = 0x%x,vlan = 0x%x\n", ah->av.gid_index,
+		ah->av.vlan);
+
+	if (ah_attr->static_rate)
+		ah->av.stat_rate = IB_RATE_10_GBPS;
+
+	memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, HNS_ROCE_GID_SIZE);
+	ah->av.sl_tclass_flowlabel = cpu_to_le32(ah_attr->sl <<
+						 HNS_ROCE_SL_SHIFT);
+
+	return &ah->ibah;
+}
+
+int hns_roce_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
+{
+	struct hns_roce_ah *ah = to_hr_ah(ibah);
+
+	memset(ah_attr, 0, sizeof(*ah_attr));
+
+	ah_attr->sl = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
+				  HNS_ROCE_SL_SHIFT;
+	ah_attr->port_num = le32_to_cpu(ah->av.port_pd) >>
+					HNS_ROCE_PORT_NUM_SHIFT;
+	ah_attr->static_rate = ah->av.stat_rate;
+	ah_attr->ah_flags = IB_AH_GRH;
+	ah_attr->grh.traffic_class = le32_to_cpu(ah->av.sl_tclass_flowlabel) >>
+						 HNS_ROCE_TCLASS_SHIFT;
+	ah_attr->grh.flow_label = le32_to_cpu(ah->av.sl_tclass_flowlabel) &
+					      HNS_ROCE_FLOW_LABLE_MASK;
+	ah_attr->grh.hop_limit = ah->av.hop_limit;
+	ah_attr->grh.sgid_index = ah->av.gid_index;
+	memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, HNS_ROCE_GID_SIZE);
+
+	return 0;
+}
+
+int hns_roce_destroy_ah(struct ib_ah *ah)
+{
+	kfree(to_hr_ah(ah));
+
+	return 0;
+}