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Message-Id: <1491979207-18686-5-git-send-email-niranjana.vishwanathapura@intel.com>
Date: Tue, 11 Apr 2017 23:39:59 -0700
From: "Vishwanathapura, Niranjana" <niranjana.vishwanathapura@...el.com>
To: dledford@...hat.com
Cc: linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
dennis.dalessandro@...el.com, ira.weiny@...el.com,
Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>,
Sadanand Warrier <sadanand.warrier@...el.com>,
Sudeep Dutt <sudeep.dutt@...el.com>,
Andrzej Kacprowski <andrzej.kacprowski@...el.com>
Subject: [PATCH rdma-next v1 04/12] IB/opa-vnic: Virtual Network Interface Controller (VNIC) netdev
OPA VNIC netdev function supports Ethernet functionality over Omni-Path
fabric by encapsulating Ethernet packets inside Omni-Path packet header.
It allocates a rdma netdev device and interfaces with the network stack to
provide standard Ethernet network interfaces. It overrides HFI1 device's
netdev operations where it is required.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@...el.com>
Reviewed-by: Ira Weiny <ira.weiny@...el.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>
Signed-off-by: Sadanand Warrier <sadanand.warrier@...el.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@...el.com>
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@...el.com>
---
MAINTAINERS | 7 +
drivers/infiniband/Kconfig | 1 +
drivers/infiniband/ulp/Makefile | 1 +
drivers/infiniband/ulp/opa_vnic/Kconfig | 8 +
drivers/infiniband/ulp/opa_vnic/Makefile | 6 +
drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c | 239 +++++++++++++++++++++
drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h | 62 ++++++
drivers/infiniband/ulp/opa_vnic/opa_vnic_ethtool.c | 65 ++++++
.../infiniband/ulp/opa_vnic/opa_vnic_internal.h | 186 ++++++++++++++++
drivers/infiniband/ulp/opa_vnic/opa_vnic_netdev.c | 229 ++++++++++++++++++++
10 files changed, 804 insertions(+)
create mode 100644 drivers/infiniband/ulp/opa_vnic/Kconfig
create mode 100644 drivers/infiniband/ulp/opa_vnic/Makefile
create mode 100644 drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c
create mode 100644 drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h
create mode 100644 drivers/infiniband/ulp/opa_vnic/opa_vnic_ethtool.c
create mode 100644 drivers/infiniband/ulp/opa_vnic/opa_vnic_internal.h
create mode 100644 drivers/infiniband/ulp/opa_vnic/opa_vnic_netdev.c
diff --git a/MAINTAINERS b/MAINTAINERS
index c776906..fc32256 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5843,6 +5843,13 @@ F: drivers/block/cciss*
F: include/linux/cciss_ioctl.h
F: include/uapi/linux/cciss_ioctl.h
+OPA-VNIC DRIVER
+M: Dennis Dalessandro <dennis.dalessandro@...el.com>
+M: Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>
+L: linux-rdma@...r.kernel.org
+S: Supported
+F: drivers/infiniband/ulp/opa_vnic
+
HFI1 DRIVER
M: Mike Marciniszyn <mike.marciniszyn@...el.com>
M: Dennis Dalessandro <dennis.dalessandro@...el.com>
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
index 66f8602..234fe01 100644
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -85,6 +85,7 @@ source "drivers/infiniband/ulp/srpt/Kconfig"
source "drivers/infiniband/ulp/iser/Kconfig"
source "drivers/infiniband/ulp/isert/Kconfig"
+source "drivers/infiniband/ulp/opa_vnic/Kconfig"
source "drivers/infiniband/sw/rdmavt/Kconfig"
source "drivers/infiniband/sw/rxe/Kconfig"
diff --git a/drivers/infiniband/ulp/Makefile b/drivers/infiniband/ulp/Makefile
index f3c7dcf..c28af18 100644
--- a/drivers/infiniband/ulp/Makefile
+++ b/drivers/infiniband/ulp/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_INFINIBAND_SRP) += srp/
obj-$(CONFIG_INFINIBAND_SRPT) += srpt/
obj-$(CONFIG_INFINIBAND_ISER) += iser/
obj-$(CONFIG_INFINIBAND_ISERT) += isert/
+obj-$(CONFIG_INFINIBAND_OPA_VNIC) += opa_vnic/
diff --git a/drivers/infiniband/ulp/opa_vnic/Kconfig b/drivers/infiniband/ulp/opa_vnic/Kconfig
new file mode 100644
index 0000000..48132ab
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/Kconfig
@@ -0,0 +1,8 @@
+config INFINIBAND_OPA_VNIC
+ tristate "Intel OPA VNIC support"
+ depends on X86_64 && INFINIBAND
+ ---help---
+ This is Omni-Path (OPA) Virtual Network Interface Controller (VNIC)
+ driver for Ethernet over Omni-Path feature. It implements the HW
+ independent VNIC functionality. It interfaces with Linux stack for
+ data path and IB MAD for the control path.
diff --git a/drivers/infiniband/ulp/opa_vnic/Makefile b/drivers/infiniband/ulp/opa_vnic/Makefile
new file mode 100644
index 0000000..975c313
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/Makefile
@@ -0,0 +1,6 @@
+# Makefile - Intel Omni-Path Virtual Network Controller driver
+# Copyright(c) 2017, Intel Corporation.
+#
+obj-$(CONFIG_INFINIBAND_OPA_VNIC) += opa_vnic.o
+
+opa_vnic-y := opa_vnic_netdev.o opa_vnic_encap.o opa_vnic_ethtool.o
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c b/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c
new file mode 100644
index 0000000..c74d02a
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.c
@@ -0,0 +1,239 @@
+/*
+ * Copyright(c) 2017 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.
+ *
+ */
+
+/*
+ * This file contains OPA VNIC encapsulation/decapsulation function.
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+
+#include "opa_vnic_internal.h"
+
+/* OPA 16B Header fields */
+#define OPA_16B_LID_MASK 0xFFFFFull
+#define OPA_16B_SLID_HIGH_SHFT 8
+#define OPA_16B_SLID_MASK 0xF00ull
+#define OPA_16B_DLID_MASK 0xF000ull
+#define OPA_16B_DLID_HIGH_SHFT 12
+#define OPA_16B_LEN_SHFT 20
+#define OPA_16B_SC_SHFT 20
+#define OPA_16B_RC_SHFT 25
+#define OPA_16B_PKEY_SHFT 16
+
+#define OPA_VNIC_L4_HDR_SHFT 16
+
+/* L2+L4 hdr len is 20 bytes (5 quad words) */
+#define OPA_VNIC_HDR_QW_LEN 5
+
+static inline void opa_vnic_make_header(u8 *hdr, u32 slid, u32 dlid, u16 len,
+ u16 pkey, u16 entropy, u8 sc, u8 rc,
+ u8 l4_type, u16 l4_hdr)
+{
+ /* h[1]: LT=1, 16B L2=10 */
+ u32 h[OPA_VNIC_HDR_QW_LEN] = {0, 0xc0000000, 0, 0, 0};
+
+ h[2] = l4_type;
+ h[3] = entropy;
+ h[4] = l4_hdr << OPA_VNIC_L4_HDR_SHFT;
+
+ /* Extract and set 4 upper bits and 20 lower bits of the lids */
+ h[0] |= (slid & OPA_16B_LID_MASK);
+ h[2] |= ((slid >> (20 - OPA_16B_SLID_HIGH_SHFT)) & OPA_16B_SLID_MASK);
+
+ h[1] |= (dlid & OPA_16B_LID_MASK);
+ h[2] |= ((dlid >> (20 - OPA_16B_DLID_HIGH_SHFT)) & OPA_16B_DLID_MASK);
+
+ h[0] |= (len << OPA_16B_LEN_SHFT);
+ h[1] |= (rc << OPA_16B_RC_SHFT);
+ h[1] |= (sc << OPA_16B_SC_SHFT);
+ h[2] |= ((u32)pkey << OPA_16B_PKEY_SHFT);
+
+ memcpy(hdr, h, OPA_VNIC_HDR_LEN);
+}
+
+/* opa_vnic_get_dlid - find and return the DLID */
+static uint32_t opa_vnic_get_dlid(struct opa_vnic_adapter *adapter,
+ struct sk_buff *skb, u8 def_port)
+{
+ struct __opa_veswport_info *info = &adapter->info;
+ struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
+ u32 dlid;
+
+ if (is_multicast_ether_addr(mac_hdr->h_dest)) {
+ dlid = info->vesw.u_mcast_dlid;
+ } else {
+ if (is_local_ether_addr(mac_hdr->h_dest)) {
+ dlid = ((uint32_t)mac_hdr->h_dest[5] << 16) |
+ ((uint32_t)mac_hdr->h_dest[4] << 8) |
+ mac_hdr->h_dest[3];
+ if (unlikely(!dlid))
+ v_warn("Null dlid in MAC address\n");
+ } else if (def_port != OPA_VNIC_INVALID_PORT) {
+ dlid = info->vesw.u_ucast_dlid[def_port];
+ }
+ }
+
+ return dlid;
+}
+
+/* opa_vnic_get_sc - return the service class */
+static u8 opa_vnic_get_sc(struct __opa_veswport_info *info,
+ struct sk_buff *skb)
+{
+ struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
+ u16 vlan_tci;
+ u8 sc;
+
+ if (!__vlan_get_tag(skb, &vlan_tci)) {
+ u8 pcp = OPA_VNIC_VLAN_PCP(vlan_tci);
+
+ if (is_multicast_ether_addr(mac_hdr->h_dest))
+ sc = info->vport.pcp_to_sc_mc[pcp];
+ else
+ sc = info->vport.pcp_to_sc_uc[pcp];
+ } else {
+ if (is_multicast_ether_addr(mac_hdr->h_dest))
+ sc = info->vport.non_vlan_sc_mc;
+ else
+ sc = info->vport.non_vlan_sc_uc;
+ }
+
+ return sc;
+}
+
+u8 opa_vnic_get_vl(struct opa_vnic_adapter *adapter, struct sk_buff *skb)
+{
+ struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
+ struct __opa_veswport_info *info = &adapter->info;
+ u8 vl;
+
+ if (skb_vlan_tag_present(skb)) {
+ u8 pcp = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
+
+ if (is_multicast_ether_addr(mac_hdr->h_dest))
+ vl = info->vport.pcp_to_vl_mc[pcp];
+ else
+ vl = info->vport.pcp_to_vl_uc[pcp];
+ } else {
+ if (is_multicast_ether_addr(mac_hdr->h_dest))
+ vl = info->vport.non_vlan_vl_mc;
+ else
+ vl = info->vport.non_vlan_vl_uc;
+ }
+
+ return vl;
+}
+
+/* opa_vnic_calc_entropy - calculate the packet entropy */
+u8 opa_vnic_calc_entropy(struct opa_vnic_adapter *adapter, struct sk_buff *skb)
+{
+ u16 hash16;
+
+ /*
+ * Get flow based 16-bit hash and then XOR the upper and lower bytes
+ * to get the entropy.
+ * __skb_tx_hash limits qcount to 16 bits. Hence, get 15-bit hash.
+ */
+ hash16 = __skb_tx_hash(adapter->netdev, skb, BIT(15));
+ return (u8)((hash16 >> 8) ^ (hash16 & 0xff));
+}
+
+/* opa_vnic_get_def_port - get default port based on entropy */
+static inline u8 opa_vnic_get_def_port(struct opa_vnic_adapter *adapter,
+ u8 entropy)
+{
+ u8 flow_id;
+
+ /* Add the upper and lower 4-bits of entropy to get the flow id */
+ flow_id = ((entropy & 0xf) + (entropy >> 4));
+ return adapter->flow_tbl[flow_id & (OPA_VNIC_FLOW_TBL_SIZE - 1)];
+}
+
+/* Calculate packet length including OPA header, crc and padding */
+static inline int opa_vnic_wire_length(struct sk_buff *skb)
+{
+ u32 pad_len;
+
+ /* padding for 8 bytes size alignment */
+ pad_len = -(skb->len + OPA_VNIC_ICRC_TAIL_LEN) & 0x7;
+ pad_len += OPA_VNIC_ICRC_TAIL_LEN;
+
+ return (skb->len + pad_len) >> 3;
+}
+
+/* opa_vnic_encap_skb - encapsulate skb packet with OPA header and meta data */
+void opa_vnic_encap_skb(struct opa_vnic_adapter *adapter, struct sk_buff *skb)
+{
+ struct __opa_veswport_info *info = &adapter->info;
+ struct opa_vnic_skb_mdata *mdata;
+ u8 def_port, sc, entropy, *hdr;
+ u16 len, l4_hdr;
+ u32 dlid;
+
+ hdr = skb_push(skb, OPA_VNIC_HDR_LEN);
+
+ entropy = opa_vnic_calc_entropy(adapter, skb);
+ def_port = opa_vnic_get_def_port(adapter, entropy);
+ len = opa_vnic_wire_length(skb);
+ dlid = opa_vnic_get_dlid(adapter, skb, def_port);
+ sc = opa_vnic_get_sc(info, skb);
+ l4_hdr = info->vesw.vesw_id;
+
+ mdata = (struct opa_vnic_skb_mdata *)skb_push(skb, sizeof(*mdata));
+ mdata->vl = opa_vnic_get_vl(adapter, skb);
+ mdata->entropy = entropy;
+ mdata->flags = 0;
+ if (unlikely(!dlid)) {
+ mdata->flags = OPA_VNIC_SKB_MDATA_ENCAP_ERR;
+ return;
+ }
+
+ opa_vnic_make_header(hdr, info->vport.encap_slid, dlid, len,
+ info->vesw.pkey, entropy, sc, 0,
+ OPA_VNIC_L4_ETHR, l4_hdr);
+}
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h b/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h
new file mode 100644
index 0000000..176fca9
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_encap.h
@@ -0,0 +1,62 @@
+#ifndef _OPA_VNIC_ENCAP_H
+#define _OPA_VNIC_ENCAP_H
+/*
+ * Copyright(c) 2017 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.
+ *
+ */
+
+/*
+ * This file contains all OPA VNIC declaration required for encapsulation
+ * and decapsulation of Ethernet packets
+ */
+
+/* VNIC configured and operational state values */
+#define OPA_VNIC_STATE_DROP_ALL 0x1
+#define OPA_VNIC_STATE_FORWARDING 0x3
+
+#define OPA_VESW_MAX_NUM_DEF_PORT 16
+#define OPA_VNIC_MAX_NUM_PCP 8
+
+#endif /* _OPA_VNIC_ENCAP_H */
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_ethtool.c b/drivers/infiniband/ulp/opa_vnic/opa_vnic_ethtool.c
new file mode 100644
index 0000000..b74f6ad
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_ethtool.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright(c) 2017 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.
+ *
+ */
+
+/*
+ * This file contains OPA VNIC ethtool functions
+ */
+
+#include <linux/ethtool.h>
+
+#include "opa_vnic_internal.h"
+
+/* ethtool ops */
+static const struct ethtool_ops opa_vnic_ethtool_ops = {
+ .get_link = ethtool_op_get_link,
+};
+
+/* opa_vnic_set_ethtool_ops - set ethtool ops */
+void opa_vnic_set_ethtool_ops(struct net_device *netdev)
+{
+ netdev->ethtool_ops = &opa_vnic_ethtool_ops;
+}
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_internal.h b/drivers/infiniband/ulp/opa_vnic/opa_vnic_internal.h
new file mode 100644
index 0000000..83ffa91
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_internal.h
@@ -0,0 +1,186 @@
+#ifndef _OPA_VNIC_INTERNAL_H
+#define _OPA_VNIC_INTERNAL_H
+/*
+ * Copyright(c) 2017 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.
+ *
+ */
+
+/*
+ * This file contains OPA VNIC driver internal declarations
+ */
+
+#include <linux/bitops.h>
+#include <linux/etherdevice.h>
+#include <linux/hashtable.h>
+#include <linux/sizes.h>
+#include <rdma/opa_vnic.h>
+
+#include "opa_vnic_encap.h"
+
+#define OPA_VNIC_VLAN_PCP(vlan_tci) \
+ (((vlan_tci) & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT)
+
+/* Flow to default port redirection table size */
+#define OPA_VNIC_FLOW_TBL_SIZE 32
+
+/* Invalid port number */
+#define OPA_VNIC_INVALID_PORT 0xff
+
+struct opa_vnic_adapter;
+
+/**
+ * struct __opa_vesw_info - OPA vnic virtual switch info
+ */
+struct __opa_vesw_info {
+ u16 fabric_id;
+ u16 vesw_id;
+
+ u8 rsvd0[6];
+ u16 def_port_mask;
+
+ u8 rsvd1[2];
+ u16 pkey;
+
+ u8 rsvd2[4];
+ u32 u_mcast_dlid;
+ u32 u_ucast_dlid[OPA_VESW_MAX_NUM_DEF_PORT];
+
+ u8 rsvd3[44];
+ u16 eth_mtu[OPA_VNIC_MAX_NUM_PCP];
+ u16 eth_mtu_non_vlan;
+ u8 rsvd4[2];
+} __packed;
+
+/**
+ * struct __opa_per_veswport_info - OPA vnic per port info
+ */
+struct __opa_per_veswport_info {
+ u32 port_num;
+
+ u8 eth_link_status;
+ u8 rsvd0[3];
+
+ u8 base_mac_addr[ETH_ALEN];
+ u8 config_state;
+ u8 oper_state;
+
+ u16 max_mac_tbl_ent;
+ u16 max_smac_ent;
+ u32 mac_tbl_digest;
+ u8 rsvd1[4];
+
+ u32 encap_slid;
+
+ u8 pcp_to_sc_uc[OPA_VNIC_MAX_NUM_PCP];
+ u8 pcp_to_vl_uc[OPA_VNIC_MAX_NUM_PCP];
+ u8 pcp_to_sc_mc[OPA_VNIC_MAX_NUM_PCP];
+ u8 pcp_to_vl_mc[OPA_VNIC_MAX_NUM_PCP];
+
+ u8 non_vlan_sc_uc;
+ u8 non_vlan_vl_uc;
+ u8 non_vlan_sc_mc;
+ u8 non_vlan_vl_mc;
+
+ u8 rsvd2[48];
+
+ u16 uc_macs_gen_count;
+ u16 mc_macs_gen_count;
+
+ u8 rsvd3[8];
+} __packed;
+
+/**
+ * struct __opa_veswport_info - OPA vnic port info
+ */
+struct __opa_veswport_info {
+ struct __opa_vesw_info vesw;
+ struct __opa_per_veswport_info vport;
+};
+
+/**
+ * struct opa_vnic_adapter - OPA VNIC netdev private data structure
+ * @netdev: pointer to associated netdev
+ * @ibdev: ib device
+ * @rn_ops: rdma netdev's net_device_ops
+ * @port_num: OPA port number
+ * @vport_num: vesw port number
+ * @lock: adapter lock
+ * @info: virtual ethernet switch port information
+ * @flow_tbl: flow to default port redirection table
+ */
+struct opa_vnic_adapter {
+ struct net_device *netdev;
+ struct ib_device *ibdev;
+ const struct net_device_ops *rn_ops;
+
+ u8 port_num;
+ u8 vport_num;
+
+ /* Lock used around concurrent updates to netdev */
+ struct mutex lock;
+
+ struct __opa_veswport_info info;
+
+ u8 flow_tbl[OPA_VNIC_FLOW_TBL_SIZE];
+};
+
+#define v_dbg(format, arg...) \
+ netdev_dbg(adapter->netdev, format, ## arg)
+#define v_err(format, arg...) \
+ netdev_err(adapter->netdev, format, ## arg)
+#define v_info(format, arg...) \
+ netdev_info(adapter->netdev, format, ## arg)
+#define v_warn(format, arg...) \
+ netdev_warn(adapter->netdev, format, ## arg)
+
+struct opa_vnic_adapter *opa_vnic_add_netdev(struct ib_device *ibdev,
+ u8 port_num, u8 vport_num);
+void opa_vnic_rem_netdev(struct opa_vnic_adapter *adapter);
+void opa_vnic_encap_skb(struct opa_vnic_adapter *adapter, struct sk_buff *skb);
+u8 opa_vnic_get_vl(struct opa_vnic_adapter *adapter, struct sk_buff *skb);
+u8 opa_vnic_calc_entropy(struct opa_vnic_adapter *adapter, struct sk_buff *skb);
+void opa_vnic_set_ethtool_ops(struct net_device *netdev);
+
+#endif /* _OPA_VNIC_INTERNAL_H */
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_netdev.c b/drivers/infiniband/ulp/opa_vnic/opa_vnic_netdev.c
new file mode 100644
index 0000000..17e8d36
--- /dev/null
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_netdev.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright(c) 2017 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.
+ *
+ */
+
+/*
+ * This file contains OPA Virtual Network Interface Controller (VNIC) driver
+ * netdev functionality.
+ */
+
+#include <linux/module.h>
+#include <linux/if_vlan.h>
+
+#include "opa_vnic_internal.h"
+
+#define OPA_TX_TIMEOUT_MS 1000
+
+#define OPA_VNIC_SKB_HEADROOM \
+ ALIGN((OPA_VNIC_HDR_LEN + OPA_VNIC_SKB_MDATA_LEN), 8)
+
+/* opa_netdev_start_xmit - transmit function */
+static netdev_tx_t opa_netdev_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
+
+ v_dbg("xmit: queue %d skb len %d\n", skb->queue_mapping, skb->len);
+ /* pad to ensure mininum ethernet packet length */
+ if (unlikely(skb->len < ETH_ZLEN)) {
+ if (skb_padto(skb, ETH_ZLEN))
+ return NETDEV_TX_OK;
+
+ skb_put(skb, ETH_ZLEN - skb->len);
+ }
+
+ opa_vnic_encap_skb(adapter, skb);
+ return adapter->rn_ops->ndo_start_xmit(skb, netdev);
+}
+
+static u16 opa_vnic_select_queue(struct net_device *netdev, struct sk_buff *skb,
+ void *accel_priv,
+ select_queue_fallback_t fallback)
+{
+ struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
+ struct opa_vnic_skb_mdata *mdata;
+ int rc;
+
+ /* pass entropy and vl as metadata in skb */
+ mdata = (struct opa_vnic_skb_mdata *)skb_push(skb, sizeof(*mdata));
+ mdata->entropy = opa_vnic_calc_entropy(adapter, skb);
+ mdata->vl = opa_vnic_get_vl(adapter, skb);
+ rc = adapter->rn_ops->ndo_select_queue(netdev, skb,
+ accel_priv, fallback);
+ skb_pull(skb, sizeof(*mdata));
+ return rc;
+}
+
+/* opa_vnic_set_mac_addr - change mac address */
+static int opa_vnic_set_mac_addr(struct net_device *netdev, void *addr)
+{
+ struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
+ struct sockaddr *sa = addr;
+ int rc;
+
+ if (!memcmp(netdev->dev_addr, sa->sa_data, ETH_ALEN))
+ return 0;
+
+ mutex_lock(&adapter->lock);
+ rc = eth_mac_addr(netdev, addr);
+ mutex_unlock(&adapter->lock);
+
+ return rc;
+}
+
+/* opa_netdev_open - activate network interface */
+static int opa_netdev_open(struct net_device *netdev)
+{
+ struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
+ int rc;
+
+ rc = adapter->rn_ops->ndo_open(adapter->netdev);
+ if (rc) {
+ v_dbg("open failed %d\n", rc);
+ return rc;
+ }
+
+ v_info("opened\n");
+ return 0;
+}
+
+/* opa_netdev_close - disable network interface */
+static int opa_netdev_close(struct net_device *netdev)
+{
+ struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
+ int rc;
+
+ rc = adapter->rn_ops->ndo_stop(adapter->netdev);
+ if (rc) {
+ v_dbg("close failed %d\n", rc);
+ return rc;
+ }
+
+ v_info("closed\n");
+ return 0;
+}
+
+/* netdev ops */
+static const struct net_device_ops opa_netdev_ops = {
+ .ndo_open = opa_netdev_open,
+ .ndo_stop = opa_netdev_close,
+ .ndo_start_xmit = opa_netdev_start_xmit,
+ .ndo_select_queue = opa_vnic_select_queue,
+ .ndo_set_mac_address = opa_vnic_set_mac_addr,
+};
+
+/* opa_vnic_add_netdev - create vnic netdev interface */
+struct opa_vnic_adapter *opa_vnic_add_netdev(struct ib_device *ibdev,
+ u8 port_num, u8 vport_num)
+{
+ struct opa_vnic_adapter *adapter;
+ struct net_device *netdev;
+ struct rdma_netdev *rn;
+ int rc;
+
+ netdev = ibdev->alloc_rdma_netdev(ibdev, port_num,
+ RDMA_NETDEV_OPA_VNIC,
+ "veth%d", NET_NAME_UNKNOWN,
+ ether_setup);
+ if (!netdev)
+ return ERR_PTR(-ENOMEM);
+ else if (IS_ERR(netdev))
+ return ERR_CAST(netdev);
+
+ adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
+ if (!adapter) {
+ rc = -ENOMEM;
+ goto adapter_err;
+ }
+
+ rn = netdev_priv(netdev);
+ rn->clnt_priv = adapter;
+ rn->hca = ibdev;
+ rn->port_num = port_num;
+ adapter->netdev = netdev;
+ adapter->ibdev = ibdev;
+ adapter->port_num = port_num;
+ adapter->vport_num = vport_num;
+ adapter->rn_ops = netdev->netdev_ops;
+
+ netdev->netdev_ops = &opa_netdev_ops;
+ netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+ netdev->hard_header_len += OPA_VNIC_SKB_HEADROOM;
+ mutex_init(&adapter->lock);
+
+ SET_NETDEV_DEV(netdev, ibdev->dev.parent);
+
+ opa_vnic_set_ethtool_ops(netdev);
+ rc = register_netdev(netdev);
+ if (rc)
+ goto netdev_err;
+
+ netif_carrier_off(netdev);
+ netif_dormant_on(netdev);
+ v_info("initialized\n");
+
+ return adapter;
+netdev_err:
+ mutex_destroy(&adapter->lock);
+ kfree(adapter);
+adapter_err:
+ ibdev->free_rdma_netdev(netdev);
+
+ return ERR_PTR(rc);
+}
+
+/* opa_vnic_rem_netdev - remove vnic netdev interface */
+void opa_vnic_rem_netdev(struct opa_vnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct ib_device *ibdev = adapter->ibdev;
+
+ v_info("removing\n");
+ unregister_netdev(netdev);
+ mutex_destroy(&adapter->lock);
+ kfree(adapter);
+ ibdev->free_rdma_netdev(netdev);
+}
--
1.8.3.1
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