|
|
@@ -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);
|
|
|
+}
|
Vishwanathapura, Niranjana