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path: root/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
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Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c')
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c416
1 files changed, 414 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
index c8062d020d1e..0cc6ec51f45f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
@@ -16,7 +16,9 @@
#include <net/tc_act/tc_skbedit.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
+#include <net/tc_act/tc_pedit.h>
#include <net/tc_act/tc_tunnel_key.h>
+#include <net/vxlan.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
@@ -36,6 +38,8 @@
#define is_vid_exactmatch(vlan_tci_mask) \
((ntohs(vlan_tci_mask) & VLAN_VID_MASK) == VLAN_VID_MASK)
+static bool is_wildcard(void *mask, int len);
+static bool is_exactmatch(void *mask, int len);
/* Return the dst fid of the func for flow forwarding
* For PFs: src_fid is the fid of the PF
* For VF-reps: src_fid the fid of the VF
@@ -111,10 +115,182 @@ static int bnxt_tc_parse_tunnel_set(struct bnxt *bp,
return 0;
}
+/* Key & Mask from the stack comes unaligned in multiple iterations of 4 bytes
+ * each(u32).
+ * This routine consolidates such multiple unaligned values into one
+ * field each for Key & Mask (for src and dst macs separately)
+ * For example,
+ * Mask/Key Offset Iteration
+ * ========== ====== =========
+ * dst mac 0xffffffff 0 1
+ * dst mac 0x0000ffff 4 2
+ *
+ * src mac 0xffff0000 4 1
+ * src mac 0xffffffff 8 2
+ *
+ * The above combination coming from the stack will be consolidated as
+ * Mask/Key
+ * ==============
+ * src mac: 0xffffffffffff
+ * dst mac: 0xffffffffffff
+ */
+static void bnxt_set_l2_key_mask(u32 part_key, u32 part_mask,
+ u8 *actual_key, u8 *actual_mask)
+{
+ u32 key = get_unaligned((u32 *)actual_key);
+ u32 mask = get_unaligned((u32 *)actual_mask);
+
+ part_key &= part_mask;
+ part_key |= key & ~part_mask;
+
+ put_unaligned(mask | part_mask, (u32 *)actual_mask);
+ put_unaligned(part_key, (u32 *)actual_key);
+}
+
+static int
+bnxt_fill_l2_rewrite_fields(struct bnxt_tc_actions *actions,
+ u16 *eth_addr, u16 *eth_addr_mask)
+{
+ u16 *p;
+ int j;
+
+ if (unlikely(bnxt_eth_addr_key_mask_invalid(eth_addr, eth_addr_mask)))
+ return -EINVAL;
+
+ if (!is_wildcard(&eth_addr_mask[0], ETH_ALEN)) {
+ if (!is_exactmatch(&eth_addr_mask[0], ETH_ALEN))
+ return -EINVAL;
+ /* FW expects dmac to be in u16 array format */
+ p = eth_addr;
+ for (j = 0; j < 3; j++)
+ actions->l2_rewrite_dmac[j] = cpu_to_be16(*(p + j));
+ }
+
+ if (!is_wildcard(&eth_addr_mask[ETH_ALEN / 2], ETH_ALEN)) {
+ if (!is_exactmatch(&eth_addr_mask[ETH_ALEN / 2], ETH_ALEN))
+ return -EINVAL;
+ /* FW expects smac to be in u16 array format */
+ p = &eth_addr[ETH_ALEN / 2];
+ for (j = 0; j < 3; j++)
+ actions->l2_rewrite_smac[j] = cpu_to_be16(*(p + j));
+ }
+
+ return 0;
+}
+
+static int
+bnxt_tc_parse_pedit(struct bnxt *bp, struct bnxt_tc_actions *actions,
+ struct flow_action_entry *act, int act_idx, u8 *eth_addr,
+ u8 *eth_addr_mask)
+{
+ size_t offset_of_ip6_daddr = offsetof(struct ipv6hdr, daddr);
+ size_t offset_of_ip6_saddr = offsetof(struct ipv6hdr, saddr);
+ u32 mask, val, offset, idx;
+ u8 htype;
+
+ offset = act->mangle.offset;
+ htype = act->mangle.htype;
+ mask = ~act->mangle.mask;
+ val = act->mangle.val;
+
+ switch (htype) {
+ case FLOW_ACT_MANGLE_HDR_TYPE_ETH:
+ if (offset > PEDIT_OFFSET_SMAC_LAST_4_BYTES) {
+ netdev_err(bp->dev,
+ "%s: eth_hdr: Invalid pedit field\n",
+ __func__);
+ return -EINVAL;
+ }
+ actions->flags |= BNXT_TC_ACTION_FLAG_L2_REWRITE;
+
+ bnxt_set_l2_key_mask(val, mask, &eth_addr[offset],
+ &eth_addr_mask[offset]);
+ break;
+ case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
+ actions->flags |= BNXT_TC_ACTION_FLAG_NAT_XLATE;
+ actions->nat.l3_is_ipv4 = true;
+ if (offset == offsetof(struct iphdr, saddr)) {
+ actions->nat.src_xlate = true;
+ actions->nat.l3.ipv4.saddr.s_addr = htonl(val);
+ } else if (offset == offsetof(struct iphdr, daddr)) {
+ actions->nat.src_xlate = false;
+ actions->nat.l3.ipv4.daddr.s_addr = htonl(val);
+ } else {
+ netdev_err(bp->dev,
+ "%s: IPv4_hdr: Invalid pedit field\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ netdev_dbg(bp->dev, "nat.src_xlate = %d src IP: %pI4 dst ip : %pI4\n",
+ actions->nat.src_xlate, &actions->nat.l3.ipv4.saddr,
+ &actions->nat.l3.ipv4.daddr);
+ break;
+
+ case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
+ actions->flags |= BNXT_TC_ACTION_FLAG_NAT_XLATE;
+ actions->nat.l3_is_ipv4 = false;
+ if (offset >= offsetof(struct ipv6hdr, saddr) &&
+ offset < offset_of_ip6_daddr) {
+ /* 16 byte IPv6 address comes in 4 iterations of
+ * 4byte chunks each
+ */
+ actions->nat.src_xlate = true;
+ idx = (offset - offset_of_ip6_saddr) / 4;
+ /* First 4bytes will be copied to idx 0 and so on */
+ actions->nat.l3.ipv6.saddr.s6_addr32[idx] = htonl(val);
+ } else if (offset >= offset_of_ip6_daddr &&
+ offset < offset_of_ip6_daddr + 16) {
+ actions->nat.src_xlate = false;
+ idx = (offset - offset_of_ip6_daddr) / 4;
+ actions->nat.l3.ipv6.saddr.s6_addr32[idx] = htonl(val);
+ } else {
+ netdev_err(bp->dev,
+ "%s: IPv6_hdr: Invalid pedit field\n",
+ __func__);
+ return -EINVAL;
+ }
+ break;
+ case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
+ case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
+ /* HW does not support L4 rewrite alone without L3
+ * rewrite
+ */
+ if (!(actions->flags & BNXT_TC_ACTION_FLAG_NAT_XLATE)) {
+ netdev_err(bp->dev,
+ "Need to specify L3 rewrite as well\n");
+ return -EINVAL;
+ }
+ if (actions->nat.src_xlate)
+ actions->nat.l4.ports.sport = htons(val);
+ else
+ actions->nat.l4.ports.dport = htons(val);
+ netdev_dbg(bp->dev, "actions->nat.sport = %d dport = %d\n",
+ actions->nat.l4.ports.sport,
+ actions->nat.l4.ports.dport);
+ break;
+ default:
+ netdev_err(bp->dev, "%s: Unsupported pedit hdr type\n",
+ __func__);
+ return -EINVAL;
+ }
+ return 0;
+}
+
static int bnxt_tc_parse_actions(struct bnxt *bp,
struct bnxt_tc_actions *actions,
struct flow_action *flow_action)
{
+ /* Used to store the L2 rewrite mask for dmac (6 bytes) followed by
+ * smac (6 bytes) if rewrite of both is specified, otherwise either
+ * dmac or smac
+ */
+ u16 eth_addr_mask[ETH_ALEN] = { 0 };
+ /* Used to store the L2 rewrite key for dmac (6 bytes) followed by
+ * smac (6 bytes) if rewrite of both is specified, otherwise either
+ * dmac or smac
+ */
+ u16 eth_addr[ETH_ALEN] = { 0 };
struct flow_action_entry *act;
int i, rc;
@@ -148,11 +324,26 @@ static int bnxt_tc_parse_actions(struct bnxt *bp,
case FLOW_ACTION_TUNNEL_DECAP:
actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP;
break;
+ /* Packet edit: L2 rewrite, NAT, NAPT */
+ case FLOW_ACTION_MANGLE:
+ rc = bnxt_tc_parse_pedit(bp, actions, act, i,
+ (u8 *)eth_addr,
+ (u8 *)eth_addr_mask);
+ if (rc)
+ return rc;
+ break;
default:
break;
}
}
+ if (actions->flags & BNXT_TC_ACTION_FLAG_L2_REWRITE) {
+ rc = bnxt_fill_l2_rewrite_fields(actions, eth_addr,
+ eth_addr_mask);
+ if (rc)
+ return rc;
+ }
+
if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
/* dst_fid is PF's fid */
@@ -401,6 +592,76 @@ static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow,
req.src_fid = cpu_to_le16(flow->src_fid);
req.ref_flow_handle = ref_flow_handle;
+ if (actions->flags & BNXT_TC_ACTION_FLAG_L2_REWRITE) {
+ memcpy(req.l2_rewrite_dmac, actions->l2_rewrite_dmac,
+ ETH_ALEN);
+ memcpy(req.l2_rewrite_smac, actions->l2_rewrite_smac,
+ ETH_ALEN);
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
+ }
+
+ if (actions->flags & BNXT_TC_ACTION_FLAG_NAT_XLATE) {
+ if (actions->nat.l3_is_ipv4) {
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_NAT_IPV4_ADDRESS;
+
+ if (actions->nat.src_xlate) {
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_NAT_SRC;
+ /* L3 source rewrite */
+ req.nat_ip_address[0] =
+ actions->nat.l3.ipv4.saddr.s_addr;
+ /* L4 source port */
+ if (actions->nat.l4.ports.sport)
+ req.nat_port =
+ actions->nat.l4.ports.sport;
+ } else {
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_NAT_DEST;
+ /* L3 destination rewrite */
+ req.nat_ip_address[0] =
+ actions->nat.l3.ipv4.daddr.s_addr;
+ /* L4 destination port */
+ if (actions->nat.l4.ports.dport)
+ req.nat_port =
+ actions->nat.l4.ports.dport;
+ }
+ netdev_dbg(bp->dev,
+ "req.nat_ip_address: %pI4 src_xlate: %d req.nat_port: %x\n",
+ req.nat_ip_address, actions->nat.src_xlate,
+ req.nat_port);
+ } else {
+ if (actions->nat.src_xlate) {
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_NAT_SRC;
+ /* L3 source rewrite */
+ memcpy(req.nat_ip_address,
+ actions->nat.l3.ipv6.saddr.s6_addr32,
+ sizeof(req.nat_ip_address));
+ /* L4 source port */
+ if (actions->nat.l4.ports.sport)
+ req.nat_port =
+ actions->nat.l4.ports.sport;
+ } else {
+ action_flags |=
+ CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_NAT_DEST;
+ /* L3 destination rewrite */
+ memcpy(req.nat_ip_address,
+ actions->nat.l3.ipv6.daddr.s6_addr32,
+ sizeof(req.nat_ip_address));
+ /* L4 destination port */
+ if (actions->nat.l4.ports.dport)
+ req.nat_port =
+ actions->nat.l4.ports.dport;
+ }
+ netdev_dbg(bp->dev,
+ "req.nat_ip_address: %pI6 src_xlate: %d req.nat_port: %x\n",
+ req.nat_ip_address, actions->nat.src_xlate,
+ req.nat_port);
+ }
+ }
+
if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP ||
actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
req.tunnel_handle = tunnel_handle;
@@ -1274,7 +1535,8 @@ static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid,
if (!bnxt_tc_can_offload(bp, flow)) {
rc = -EOPNOTSUPP;
- goto free_node;
+ kfree_rcu(new_node, rcu);
+ return rc;
}
/* If a flow exists with the same cookie, delete it */
@@ -1580,6 +1842,147 @@ int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
}
}
+static int bnxt_tc_setup_indr_block_cb(enum tc_setup_type type,
+ void *type_data, void *cb_priv)
+{
+ struct bnxt_flower_indr_block_cb_priv *priv = cb_priv;
+ struct flow_cls_offload *flower = type_data;
+ struct bnxt *bp = priv->bp;
+
+ if (flower->common.chain_index)
+ return -EOPNOTSUPP;
+
+ switch (type) {
+ case TC_SETUP_CLSFLOWER:
+ return bnxt_tc_setup_flower(bp, bp->pf.fw_fid, flower);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static struct bnxt_flower_indr_block_cb_priv *
+bnxt_tc_indr_block_cb_lookup(struct bnxt *bp, struct net_device *netdev)
+{
+ struct bnxt_flower_indr_block_cb_priv *cb_priv;
+
+ /* All callback list access should be protected by RTNL. */
+ ASSERT_RTNL();
+
+ list_for_each_entry(cb_priv, &bp->tc_indr_block_list, list)
+ if (cb_priv->tunnel_netdev == netdev)
+ return cb_priv;
+
+ return NULL;
+}
+
+static void bnxt_tc_setup_indr_rel(void *cb_priv)
+{
+ struct bnxt_flower_indr_block_cb_priv *priv = cb_priv;
+
+ list_del(&priv->list);
+ kfree(priv);
+}
+
+static int bnxt_tc_setup_indr_block(struct net_device *netdev, struct bnxt *bp,
+ struct flow_block_offload *f)
+{
+ struct bnxt_flower_indr_block_cb_priv *cb_priv;
+ struct flow_block_cb *block_cb;
+
+ if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
+ return -EOPNOTSUPP;
+
+ switch (f->command) {
+ case FLOW_BLOCK_BIND:
+ cb_priv = kmalloc(sizeof(*cb_priv), GFP_KERNEL);
+ if (!cb_priv)
+ return -ENOMEM;
+
+ cb_priv->tunnel_netdev = netdev;
+ cb_priv->bp = bp;
+ list_add(&cb_priv->list, &bp->tc_indr_block_list);
+
+ block_cb = flow_block_cb_alloc(bnxt_tc_setup_indr_block_cb,
+ cb_priv, cb_priv,
+ bnxt_tc_setup_indr_rel);
+ if (IS_ERR(block_cb)) {
+ list_del(&cb_priv->list);
+ kfree(cb_priv);
+ return PTR_ERR(block_cb);
+ }
+
+ flow_block_cb_add(block_cb, f);
+ list_add_tail(&block_cb->driver_list, &bnxt_block_cb_list);
+ break;
+ case FLOW_BLOCK_UNBIND:
+ cb_priv = bnxt_tc_indr_block_cb_lookup(bp, netdev);
+ if (!cb_priv)
+ return -ENOENT;
+
+ block_cb = flow_block_cb_lookup(f->block,
+ bnxt_tc_setup_indr_block_cb,
+ cb_priv);
+ if (!block_cb)
+ return -ENOENT;
+
+ flow_block_cb_remove(block_cb, f);
+ list_del(&block_cb->driver_list);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+static int bnxt_tc_setup_indr_cb(struct net_device *netdev, void *cb_priv,
+ enum tc_setup_type type, void *type_data)
+{
+ switch (type) {
+ case TC_SETUP_BLOCK:
+ return bnxt_tc_setup_indr_block(netdev, cb_priv, type_data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static bool bnxt_is_netdev_indr_offload(struct net_device *netdev)
+{
+ return netif_is_vxlan(netdev);
+}
+
+static int bnxt_tc_indr_block_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *netdev;
+ struct bnxt *bp;
+ int rc;
+
+ netdev = netdev_notifier_info_to_dev(ptr);
+ if (!bnxt_is_netdev_indr_offload(netdev))
+ return NOTIFY_OK;
+
+ bp = container_of(nb, struct bnxt, tc_netdev_nb);
+
+ switch (event) {
+ case NETDEV_REGISTER:
+ rc = __flow_indr_block_cb_register(netdev, bp,
+ bnxt_tc_setup_indr_cb,
+ bp);
+ if (rc)
+ netdev_info(bp->dev,
+ "Failed to register indirect blk: dev: %s",
+ netdev->name);
+ break;
+ case NETDEV_UNREGISTER:
+ __flow_indr_block_cb_unregister(netdev,
+ bnxt_tc_setup_indr_cb,
+ bp);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
static const struct rhashtable_params bnxt_tc_flow_ht_params = {
.head_offset = offsetof(struct bnxt_tc_flow_node, node),
.key_offset = offsetof(struct bnxt_tc_flow_node, cookie),
@@ -1663,7 +2066,15 @@ int bnxt_init_tc(struct bnxt *bp)
bp->dev->hw_features |= NETIF_F_HW_TC;
bp->dev->features |= NETIF_F_HW_TC;
bp->tc_info = tc_info;
- return 0;
+
+ /* init indirect block notifications */
+ INIT_LIST_HEAD(&bp->tc_indr_block_list);
+ bp->tc_netdev_nb.notifier_call = bnxt_tc_indr_block_event;
+ rc = register_netdevice_notifier(&bp->tc_netdev_nb);
+ if (!rc)
+ return 0;
+
+ rhashtable_destroy(&tc_info->encap_table);
destroy_decap_table:
rhashtable_destroy(&tc_info->decap_table);
@@ -1685,6 +2096,7 @@ void bnxt_shutdown_tc(struct bnxt *bp)
if (!bnxt_tc_flower_enabled(bp))
return;
+ unregister_netdevice_notifier(&bp->tc_netdev_nb);
rhashtable_destroy(&tc_info->flow_table);
rhashtable_destroy(&tc_info->l2_table);
rhashtable_destroy(&tc_info->decap_l2_table);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.