Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 287 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
new file mode 100644
index 000000000..32aaa4ef4
--- /dev/null
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
@@ -0,0 +1,287 @@
+/* This file is part of the Emulex RoCE Device Driver for
+ * RoCE (RDMA over Converged Ethernet) adapters.
+ * Copyright (C) 2012-2015 Emulex. All rights reserved.
+ * EMULEX and SLI are trademarks of Emulex.
+ * www.emulex.com
+ *
+ * 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 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.
+ *
+ * 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 HOLDER 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.
+ *
+ * Contact Information:
+ * linux-drivers@emulex.com
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ */
+
+#include <net/neighbour.h>
+#include <net/netevent.h>
+
+#include <rdma/ib_addr.h>
+#include <rdma/ib_mad.h>
+#include <rdma/ib_cache.h>
+
+#include "ocrdma.h"
+#include "ocrdma_verbs.h"
+#include "ocrdma_ah.h"
+#include "ocrdma_hw.h"
+#include "ocrdma_stats.h"
+
+#define OCRDMA_VID_PCP_SHIFT	0xD
+
+static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
+{
+	switch (hdr_type) {
+	case OCRDMA_L3_TYPE_IB_GRH:
+		return (u16)ETH_P_IBOE;
+	case OCRDMA_L3_TYPE_IPV4:
+		return (u16)0x0800;
+	case OCRDMA_L3_TYPE_IPV6:
+		return (u16)0x86dd;
+	default:
+		pr_err("ocrdma%d: Invalid network header\n", devid);
+		return 0;
+	}
+}
+
+static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
+			struct rdma_ah_attr *attr, const union ib_gid *sgid,
+			int pdid, bool *isvlan, u16 vlan_tag)
+{
+	int status;
+	struct ocrdma_eth_vlan eth;
+	struct ocrdma_grh grh;
+	int eth_sz;
+	u16 proto_num = 0;
+	u8 nxthdr = 0x11;
+	struct iphdr ipv4;
+	const struct ib_global_route *ib_grh;
+	union {
+		struct sockaddr_in  _sockaddr_in;
+		struct sockaddr_in6 _sockaddr_in6;
+	} sgid_addr, dgid_addr;
+
+	memset(&eth, 0, sizeof(eth));
+	memset(&grh, 0, sizeof(grh));
+
+	/* Protocol Number */
+	proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
+	if (!proto_num)
+		return -EINVAL;
+	nxthdr = (proto_num == ETH_P_IBOE) ? 0x1b : 0x11;
+	/* VLAN */
+	if (!vlan_tag || (vlan_tag > 0xFFF))
+		vlan_tag = dev->pvid;
+	if (vlan_tag || dev->pfc_state) {
+		if (!vlan_tag) {
+			pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
+				dev->id);
+			pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
+				dev->id);
+		}
+		eth.eth_type = cpu_to_be16(0x8100);
+		eth.roce_eth_type = cpu_to_be16(proto_num);
+		vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
+		eth.vlan_tag = cpu_to_be16(vlan_tag);
+		eth_sz = sizeof(struct ocrdma_eth_vlan);
+		*isvlan = true;
+	} else {
+		eth.eth_type = cpu_to_be16(proto_num);
+		eth_sz = sizeof(struct ocrdma_eth_basic);
+	}
+	/* MAC */
+	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
+	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
+	if (status)
+		return status;
+	ib_grh = rdma_ah_read_grh(attr);
+	ah->sgid_index = ib_grh->sgid_index;
+	/* Eth HDR */
+	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
+	if (ah->hdr_type == RDMA_NETWORK_IPV4) {
+		*((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
+					   ib_grh->traffic_class);
+		ipv4.id = cpu_to_be16(pdid);
+		ipv4.frag_off = htons(IP_DF);
+		ipv4.tot_len = htons(0);
+		ipv4.ttl = ib_grh->hop_limit;
+		ipv4.protocol = nxthdr;
+		rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid);
+		ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
+		rdma_gid2ip((struct sockaddr*)&dgid_addr, &ib_grh->dgid);
+		ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
+		memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
+	} else {
+		memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
+		grh.tclass_flow = cpu_to_be32((6 << 28) |
+					      (ib_grh->traffic_class << 24) |
+					      ib_grh->flow_label);
+		memcpy(&grh.dgid[0], ib_grh->dgid.raw,
+		       sizeof(ib_grh->dgid.raw));
+		grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
+						(nxthdr << 8) |
+						ib_grh->hop_limit);
+		memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
+	}
+	if (*isvlan)
+		ah->av->valid |= OCRDMA_AV_VLAN_VALID;
+	ah->av->valid = cpu_to_le32(ah->av->valid);
+	return status;
+}
+
+struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct rdma_ah_attr *attr,
+			       struct ib_udata *udata)
+{
+	u32 *ahid_addr;
+	int status;
+	struct ocrdma_ah *ah;
+	bool isvlan = false;
+	u16 vlan_tag = 0xffff;
+	const struct ib_gid_attr *sgid_attr;
+	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
+
+	if ((attr->type != RDMA_AH_ATTR_TYPE_ROCE) ||
+	    !(rdma_ah_get_ah_flags(attr) & IB_AH_GRH))
+		return ERR_PTR(-EINVAL);
+
+	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
+		ocrdma_init_service_level(dev);
+
+	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
+	if (!ah)
+		return ERR_PTR(-ENOMEM);
+
+	status = ocrdma_alloc_av(dev, ah);
+	if (status)
+		goto av_err;
+
+	sgid_attr = attr->grh.sgid_attr;
+	if (is_vlan_dev(sgid_attr->ndev))
+		vlan_tag = vlan_dev_vlan_id(sgid_attr->ndev);
+
+	/* Get network header type for this GID */
+	ah->hdr_type = rdma_gid_attr_network_type(sgid_attr);
+
+	status = set_av_attr(dev, ah, attr, &sgid_attr->gid, pd->id,
+			     &isvlan, vlan_tag);
+	if (status)
+		goto av_conf_err;
+
+	/* if pd is for the user process, pass the ah_id to user space */
+	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
+		ahid_addr = pd->uctx->ah_tbl.va + rdma_ah_get_dlid(attr);
+		*ahid_addr = 0;
+		*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
+		if (ocrdma_is_udp_encap_supported(dev)) {
+			*ahid_addr |= ((u32)ah->hdr_type &
+				       OCRDMA_AH_L3_TYPE_MASK) <<
+				       OCRDMA_AH_L3_TYPE_SHIFT;
+		}
+		if (isvlan)
+			*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
+				       OCRDMA_AH_VLAN_VALID_SHIFT);
+	}
+
+	return &ah->ibah;
+
+av_conf_err:
+	ocrdma_free_av(dev, ah);
+av_err:
+	kfree(ah);
+	return ERR_PTR(status);
+}
+
+int ocrdma_destroy_ah(struct ib_ah *ibah)
+{
+	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
+	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);
+
+	ocrdma_free_av(dev, ah);
+	kfree(ah);
+	return 0;
+}
+
+int ocrdma_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *attr)
+{
+	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
+	struct ocrdma_av *av = ah->av;
+	struct ocrdma_grh *grh;
+
+	attr->type = ibah->type;
+	if (ah->av->valid & OCRDMA_AV_VALID) {
+		grh = (struct ocrdma_grh *)((u8 *)ah->av +
+				sizeof(struct ocrdma_eth_vlan));
+		rdma_ah_set_sl(attr, be16_to_cpu(av->eth_hdr.vlan_tag) >> 13);
+	} else {
+		grh = (struct ocrdma_grh *)((u8 *)ah->av +
+					sizeof(struct ocrdma_eth_basic));
+		rdma_ah_set_sl(attr, 0);
+	}
+	rdma_ah_set_grh(attr, NULL,
+			be32_to_cpu(grh->tclass_flow) & 0xffffffff,
+			ah->sgid_index,
+			be32_to_cpu(grh->pdid_hoplimit) & 0xff,
+			be32_to_cpu(grh->tclass_flow) >> 24);
+	rdma_ah_set_dgid_raw(attr, &grh->dgid[0]);
+	return 0;
+}
+
+int ocrdma_process_mad(struct ib_device *ibdev,
+		       int process_mad_flags,
+		       u8 port_num,
+		       const struct ib_wc *in_wc,
+		       const struct ib_grh *in_grh,
+		       const struct ib_mad_hdr *in, size_t in_mad_size,
+		       struct ib_mad_hdr *out, size_t *out_mad_size,
+		       u16 *out_mad_pkey_index)
+{
+	int status;
+	struct ocrdma_dev *dev;
+	const struct ib_mad *in_mad = (const struct ib_mad *)in;
+	struct ib_mad *out_mad = (struct ib_mad *)out;
+
+	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
+			 *out_mad_size != sizeof(*out_mad)))
+		return IB_MAD_RESULT_FAILURE;
+
+	switch (in_mad->mad_hdr.mgmt_class) {
+	case IB_MGMT_CLASS_PERF_MGMT:
+		dev = get_ocrdma_dev(ibdev);
+		if (!ocrdma_pma_counters(dev, out_mad))
+			status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
+		else
+			status = IB_MAD_RESULT_SUCCESS;
+		break;
+	default:
+		status = IB_MAD_RESULT_SUCCESS;
+		break;
+	}
+	return status;
+}