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From: Felix Fietkau <nbd@nbd.name>
Date: Sun, 11 Oct 2020 22:23:08 +0200
Subject: [PATCH] ethernet: mediatek: mtk_eth_soc: add support for
initializing the PPE
The PPE (packet processing engine) is used to offload NAT/routed or even
bridged flows. This patch brings up the PPE and uses it to get a packet
hash. It also contains some functionality that will be used to bring up
flow offloading later
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
create mode 100644 drivers/net/ethernet/mediatek/mtk_ppe.c
create mode 100644 drivers/net/ethernet/mediatek/mtk_ppe.h
create mode 100644 drivers/net/ethernet/mediatek/mtk_ppe_regs.h
--- a/drivers/net/ethernet/mediatek/Makefile
+++ b/drivers/net/ethernet/mediatek/Makefile
@@ -4,4 +4,4 @@
#
obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth.o
-mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o
+mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2301,12 +2301,17 @@ static int mtk_open(struct net_device *d
/* we run 2 netdevs on the same dma ring so we only bring it up once */
if (!refcount_read(&eth->dma_refcnt)) {
- int err = mtk_start_dma(eth);
+ u32 gdm_config = MTK_GDMA_TO_PDMA;
+ int err;
+ err = mtk_start_dma(eth);
if (err)
return err;
- mtk_gdm_config(eth, MTK_GDMA_TO_PDMA);
+ if (eth->soc->offload_version && mtk_ppe_start(&eth->ppe) == 0)
+ gdm_config = MTK_GDMA_TO_PPE;
+
+ mtk_gdm_config(eth, gdm_config);
napi_enable(&eth->tx_napi);
napi_enable(&eth->rx_napi);
@@ -2376,6 +2381,9 @@ static int mtk_stop(struct net_device *d
mtk_dma_free(eth);
+ if (eth->soc->offload_version)
+ mtk_ppe_stop(&eth->ppe);
+
return 0;
}
@@ -3162,6 +3170,13 @@ static int mtk_probe(struct platform_dev
goto err_free_dev;
}
+ if (eth->soc->offload_version) {
+ err = mtk_ppe_init(&eth->ppe, eth->dev,
+ eth->base + MTK_ETH_PPE_BASE, 2);
+ if (err)
+ goto err_free_dev;
+ }
+
for (i = 0; i < MTK_MAX_DEVS; i++) {
if (!eth->netdev[i])
continue;
@@ -3236,6 +3251,7 @@ static const struct mtk_soc_data mt7621_
.hw_features = MTK_HW_FEATURES,
.required_clks = MT7621_CLKS_BITMAP,
.required_pctl = false,
+ .offload_version = 2,
};
static const struct mtk_soc_data mt7622_data = {
@@ -3244,6 +3260,7 @@ static const struct mtk_soc_data mt7622_
.hw_features = MTK_HW_FEATURES,
.required_clks = MT7622_CLKS_BITMAP,
.required_pctl = false,
+ .offload_version = 2,
};
static const struct mtk_soc_data mt7623_data = {
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -16,6 +16,7 @@
#include <linux/refcount.h>
#include <linux/phylink.h>
#include <linux/dim.h>
+#include "mtk_ppe.h"
#define MTK_QDMA_PAGE_SIZE 2048
#define MTK_MAX_RX_LENGTH 1536
@@ -87,6 +88,7 @@
#define MTK_GDMA_TCS_EN BIT(21)
#define MTK_GDMA_UCS_EN BIT(20)
#define MTK_GDMA_TO_PDMA 0x0
+#define MTK_GDMA_TO_PPE 0x4444
#define MTK_GDMA_DROP_ALL 0x7777
/* Unicast Filter MAC Address Register - Low */
@@ -321,6 +323,12 @@
#define RX_DMA_VID(_x) ((_x) & 0xfff)
/* QDMA descriptor rxd4 */
+#define MTK_RXD4_FOE_ENTRY GENMASK(13, 0)
+#define MTK_RXD4_PPE_CPU_REASON GENMASK(18, 14)
+#define MTK_RXD4_SRC_PORT GENMASK(21, 19)
+#define MTK_RXD4_ALG GENMASK(31, 22)
+
+/* QDMA descriptor rxd4 */
#define RX_DMA_L4_VALID BIT(24)
#define RX_DMA_L4_VALID_PDMA BIT(30) /* when PDMA is used */
#define RX_DMA_FPORT_SHIFT 19
@@ -827,6 +835,7 @@ struct mtk_soc_data {
u32 caps;
u32 required_clks;
bool required_pctl;
+ u8 offload_version;
netdev_features_t hw_features;
};
@@ -938,6 +947,8 @@ struct mtk_eth {
u32 tx_int_status_reg;
u32 rx_dma_l4_valid;
int ip_align;
+
+ struct mtk_ppe ppe;
};
/* struct mtk_mac - the structure that holds the info about the MACs of the
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
+
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+#include "mtk_ppe.h"
+#include "mtk_ppe_regs.h"
+
+static void ppe_w32(struct mtk_ppe *ppe, u32 reg, u32 val)
+{
+ writel(val, ppe->base + reg);
+}
+
+static u32 ppe_r32(struct mtk_ppe *ppe, u32 reg)
+{
+ return readl(ppe->base + reg);
+}
+
+static u32 ppe_m32(struct mtk_ppe *ppe, u32 reg, u32 mask, u32 set)
+{
+ u32 val;
+
+ val = ppe_r32(ppe, reg);
+ val &= ~mask;
+ val |= set;
+ ppe_w32(ppe, reg, val);
+
+ return val;
+}
+
+static u32 ppe_set(struct mtk_ppe *ppe, u32 reg, u32 val)
+{
+ return ppe_m32(ppe, reg, 0, val);
+}
+
+static u32 ppe_clear(struct mtk_ppe *ppe, u32 reg, u32 val)
+{
+ return ppe_m32(ppe, reg, val, 0);
+}
+
+static int mtk_ppe_wait_busy(struct mtk_ppe *ppe)
+{
+ unsigned long timeout = jiffies + HZ;
+
+ while (time_is_after_jiffies(timeout)) {
+ if (!(ppe_r32(ppe, MTK_PPE_GLO_CFG) & MTK_PPE_GLO_CFG_BUSY))
+ return 0;
+
+ usleep_range(10, 20);
+ }
+
+ dev_err(ppe->dev, "PPE table busy");
+
+ return -ETIMEDOUT;
+}
+
+static void mtk_ppe_cache_clear(struct mtk_ppe *ppe)
+{
+ ppe_set(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_CLEAR);
+ ppe_clear(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_CLEAR);
+}
+
+static void mtk_ppe_cache_enable(struct mtk_ppe *ppe, bool enable)
+{
+ mtk_ppe_cache_clear(ppe);
+
+ ppe_m32(ppe, MTK_PPE_CACHE_CTL, MTK_PPE_CACHE_CTL_EN,
+ enable * MTK_PPE_CACHE_CTL_EN);
+}
+
+static u32 mtk_ppe_hash_entry(struct mtk_foe_entry *e)
+{
+ u32 hv1, hv2, hv3;
+ u32 hash;
+
+ switch (FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, e->ib1)) {
+ case MTK_PPE_PKT_TYPE_BRIDGE:
+ hv1 = e->bridge.src_mac_lo;
+ hv1 ^= ((e->bridge.src_mac_hi & 0xffff) << 16);
+ hv2 = e->bridge.src_mac_hi >> 16;
+ hv2 ^= e->bridge.dest_mac_lo;
+ hv3 = e->bridge.dest_mac_hi;
+ break;
+ case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
+ case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
+ hv1 = e->ipv4.orig.ports;
+ hv2 = e->ipv4.orig.dest_ip;
+ hv3 = e->ipv4.orig.src_ip;
+ break;
+ case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
+ case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
+ hv1 = e->ipv6.src_ip[3] ^ e->ipv6.dest_ip[3];
+ hv1 ^= e->ipv6.ports;
+
+ hv2 = e->ipv6.src_ip[2] ^ e->ipv6.dest_ip[2];
+ hv2 ^= e->ipv6.dest_ip[0];
+
+ hv3 = e->ipv6.src_ip[1] ^ e->ipv6.dest_ip[1];
+ hv3 ^= e->ipv6.src_ip[0];
+ break;
+ case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
+ case MTK_PPE_PKT_TYPE_IPV6_6RD:
+ default:
+ WARN_ON_ONCE(1);
+ return MTK_PPE_HASH_MASK;
+ }
+
+ hash = (hv1 & hv2) | ((~hv1) & hv3);
+ hash = (hash >> 24) | ((hash & 0xffffff) << 8);
+ hash ^= hv1 ^ hv2 ^ hv3;
+ hash ^= hash >> 16;
+ hash <<= 1;
+ hash &= MTK_PPE_ENTRIES - 1;
+
+ return hash;
+}
+
+static inline struct mtk_foe_mac_info *
+mtk_foe_entry_l2(struct mtk_foe_entry *entry)
+{
+ int type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
+
+ if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE)
+ return &entry->ipv6.l2;
+
+ return &entry->ipv4.l2;
+}
+
+static inline u32 *
+mtk_foe_entry_ib2(struct mtk_foe_entry *entry)
+{
+ int type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
+
+ if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE)
+ return &entry->ipv6.ib2;
+
+ return &entry->ipv4.ib2;
+}
+
+int mtk_foe_entry_prepare(struct mtk_foe_entry *entry, int type, int l4proto,
+ u8 pse_port, u8 *src_mac, u8 *dest_mac)
+{
+ struct mtk_foe_mac_info *l2;
+ u32 ports_pad, val;
+
+ memset(entry, 0, sizeof(*entry));
+
+ val = FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_BIND) |
+ FIELD_PREP(MTK_FOE_IB1_PACKET_TYPE, type) |
+ FIELD_PREP(MTK_FOE_IB1_UDP, l4proto == IPPROTO_UDP) |
+ MTK_FOE_IB1_BIND_TTL |
+ MTK_FOE_IB1_BIND_CACHE |
+ MTK_FOE_IB1_BIND_KEEPALIVE;
+ entry->ib1 = val;
+
+ val = FIELD_PREP(MTK_FOE_IB2_PORT_MG, 0x3f) |
+ FIELD_PREP(MTK_FOE_IB2_PORT_AG, 0x1f) |
+ FIELD_PREP(MTK_FOE_IB2_DEST_PORT, pse_port);
+
+ if (is_multicast_ether_addr(dest_mac))
+ val |= MTK_FOE_IB2_MULTICAST;
+
+ ports_pad = 0xa5a5a500 | (l4proto & 0xff);
+ if (type == MTK_PPE_PKT_TYPE_IPV4_ROUTE)
+ entry->ipv4.orig.ports = ports_pad;
+ if (type == MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T)
+ entry->ipv6.ports = ports_pad;
+
+ if (type >= MTK_PPE_PKT_TYPE_IPV4_DSLITE) {
+ entry->ipv6.ib2 = val;
+ l2 = &entry->ipv6.l2;
+ } else {
+ entry->ipv4.ib2 = val;
+ l2 = &entry->ipv4.l2;
+ }
+
+ l2->dest_mac_hi = get_unaligned_be32(dest_mac);
+ l2->dest_mac_lo = get_unaligned_be16(dest_mac + 4);
+ l2->src_mac_hi = get_unaligned_be32(src_mac);
+ l2->src_mac_lo = get_unaligned_be16(src_mac + 4);
+
+ if (type >= MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T)
+ l2->etype = ETH_P_IPV6;
+ else
+ l2->etype = ETH_P_IP;
+
+ return 0;
+}
+
+int mtk_foe_entry_set_ipv4_tuple(struct mtk_foe_entry *entry, bool egress,
+ __be32 src_addr, __be16 src_port,
+ __be32 dest_addr, __be16 dest_port)
+{
+ int type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
+ struct mtk_ipv4_tuple *t;
+
+ switch (type) {
+ case MTK_PPE_PKT_TYPE_IPV4_HNAPT:
+ if (egress) {
+ t = &entry->ipv4.new;
+ break;
+ }
+ fallthrough;
+ case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
+ case MTK_PPE_PKT_TYPE_IPV4_ROUTE:
+ t = &entry->ipv4.orig;
+ break;
+ case MTK_PPE_PKT_TYPE_IPV6_6RD:
+ entry->ipv6_6rd.tunnel_src_ip = be32_to_cpu(src_addr);
+ entry->ipv6_6rd.tunnel_dest_ip = be32_to_cpu(dest_addr);
+ return 0;
+ default:
+ WARN_ON_ONCE(1);
+ return -EINVAL;
+ }
+
+ t->src_ip = be32_to_cpu(src_addr);
+ t->dest_ip = be32_to_cpu(dest_addr);
+
+ if (type == MTK_PPE_PKT_TYPE_IPV4_ROUTE)
+ return 0;
+
+ t->src_port = be16_to_cpu(src_port);
+ t->dest_port = be16_to_cpu(dest_port);
+
+ return 0;
+}
+
+int mtk_foe_entry_set_ipv6_tuple(struct mtk_foe_entry *entry,
+ __be32 *src_addr, __be16 src_port,
+ __be32 *dest_addr, __be16 dest_port)
+{
+ int type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
+ u32 *src, *dest;
+ int i;
+
+ switch (type) {
+ case MTK_PPE_PKT_TYPE_IPV4_DSLITE:
+ src = entry->dslite.tunnel_src_ip;
+ dest = entry->dslite.tunnel_dest_ip;
+ break;
+ case MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T:
+ case MTK_PPE_PKT_TYPE_IPV6_6RD:
+ entry->ipv6.src_port = be16_to_cpu(src_port);
+ entry->ipv6.dest_port = be16_to_cpu(dest_port);
+ fallthrough;
+ case MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T:
+ src = entry->ipv6.src_ip;
+ dest = entry->ipv6.dest_ip;
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return -EINVAL;
+ };
+
+ for (i = 0; i < 4; i++)
+ src[i] = be32_to_cpu(src_addr[i]);
+ for (i = 0; i < 4; i++)
+ dest[i] = be32_to_cpu(dest_addr[i]);
+
+ return 0;
+}
+
+int mtk_foe_entry_set_dsa(struct mtk_foe_entry *entry, int port)
+{
+ struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(entry);
+
+ l2->etype = BIT(port);
+
+ if (!(entry->ib1 & MTK_FOE_IB1_BIND_VLAN_LAYER))
+ entry->ib1 |= FIELD_PREP(MTK_FOE_IB1_BIND_VLAN_LAYER, 1);
+ else
+ l2->etype |= BIT(8);
+
+ entry->ib1 &= ~MTK_FOE_IB1_BIND_VLAN_TAG;
+
+ return 0;
+}
+
+int mtk_foe_entry_set_vlan(struct mtk_foe_entry *entry, int vid)
+{
+ struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(entry);
+
+ switch (FIELD_GET(MTK_FOE_IB1_BIND_VLAN_LAYER, entry->ib1)) {
+ case 0:
+ entry->ib1 |= MTK_FOE_IB1_BIND_VLAN_TAG |
+ FIELD_PREP(MTK_FOE_IB1_BIND_VLAN_LAYER, 1);
+ l2->vlan1 = vid;
+ return 0;
+ case 1:
+ if (!(entry->ib1 & MTK_FOE_IB1_BIND_VLAN_TAG)) {
+ l2->vlan1 = vid;
+ l2->etype |= BIT(8);
+ } else {
+ l2->vlan2 = vid;
+ entry->ib1 += FIELD_PREP(MTK_FOE_IB1_BIND_VLAN_LAYER, 1);
+ }
+ return 0;
+ default:
+ return -ENOSPC;
+ }
+}
+
+int mtk_foe_entry_set_pppoe(struct mtk_foe_entry *entry, int sid)
+{
+ struct mtk_foe_mac_info *l2 = mtk_foe_entry_l2(entry);
+
+ if (!(entry->ib1 & MTK_FOE_IB1_BIND_VLAN_LAYER) ||
+ (entry->ib1 & MTK_FOE_IB1_BIND_VLAN_TAG))
+ l2->etype = ETH_P_PPP_SES;
+
+ entry->ib1 |= MTK_FOE_IB1_BIND_PPPOE;
+ l2->pppoe_id = sid;
+
+ return 0;
+}
+
+static inline bool mtk_foe_entry_usable(struct mtk_foe_entry *entry)
+{
+ return !(entry->ib1 & MTK_FOE_IB1_STATIC) &&
+ FIELD_GET(MTK_FOE_IB1_STATE, entry->ib1) != MTK_FOE_STATE_BIND;
+}
+
+int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_foe_entry *entry,
+ u16 timestamp)
+{
+ struct mtk_foe_entry *hwe;
+ u32 hash;
+
+ timestamp &= MTK_FOE_IB1_BIND_TIMESTAMP;
+ entry->ib1 &= ~MTK_FOE_IB1_BIND_TIMESTAMP;
+ entry->ib1 |= FIELD_PREP(MTK_FOE_IB1_BIND_TIMESTAMP, timestamp);
+
+ hash = mtk_ppe_hash_entry(entry);
+ hwe = &ppe->foe_table[hash];
+ if (!mtk_foe_entry_usable(hwe)) {
+ hwe++;
+ hash++;
+
+ if (!mtk_foe_entry_usable(hwe))
+ return -ENOSPC;
+ }
+
+ memcpy(&hwe->data, &entry->data, sizeof(hwe->data));
+ wmb();
+ hwe->ib1 = entry->ib1;
+
+ dma_wmb();
+
+ mtk_ppe_cache_clear(ppe);
+
+ return hash;
+}
+
+int mtk_ppe_init(struct mtk_ppe *ppe, struct device *dev, void __iomem *base,
+ int version)
+{
+ struct mtk_foe_entry *foe;
+
+ /* need to allocate a separate device, since it PPE DMA access is
+ * not coherent.
+ */
+ ppe->base = base;
+ ppe->dev = dev;
+ ppe->version = version;
+
+ foe = dmam_alloc_coherent(ppe->dev, MTK_PPE_ENTRIES * sizeof(*foe),
+ &ppe->foe_phys, GFP_KERNEL);
+ if (!foe)
+ return -ENOMEM;
+
+ ppe->foe_table = foe;
+
+ return 0;
+}
+
+static void mtk_ppe_init_foe_table(struct mtk_ppe *ppe)
+{
+ static const u8 skip[] = { 12, 25, 38, 51, 76, 89, 102 };
+ int i, k;
+
+ memset(ppe->foe_table, 0, MTK_PPE_ENTRIES * sizeof(ppe->foe_table));
+
+ if (!IS_ENABLED(CONFIG_SOC_MT7621))
+ return;
+
+ /* skip all entries that cross the 1024 byte boundary */
+ for (i = 0; i < MTK_PPE_ENTRIES; i += 128)
+ for (k = 0; k < ARRAY_SIZE(skip); k++)
+ ppe->foe_table[i + skip[k]].ib1 |= MTK_FOE_IB1_STATIC;
+}
+
+int mtk_ppe_start(struct mtk_ppe *ppe)
+{
+ u32 val;
+
+ mtk_ppe_init_foe_table(ppe);
+ ppe_w32(ppe, MTK_PPE_TB_BASE, ppe->foe_phys);
+
+ val = MTK_PPE_TB_CFG_ENTRY_80B |
+ MTK_PPE_TB_CFG_AGE_NON_L4 |
+ MTK_PPE_TB_CFG_AGE_UNBIND |
+ MTK_PPE_TB_CFG_AGE_TCP |
+ MTK_PPE_TB_CFG_AGE_UDP |
+ MTK_PPE_TB_CFG_AGE_TCP_FIN |
+ FIELD_PREP(MTK_PPE_TB_CFG_SEARCH_MISS,
+ MTK_PPE_SEARCH_MISS_ACTION_FORWARD_BUILD) |
+ FIELD_PREP(MTK_PPE_TB_CFG_KEEPALIVE,
+ MTK_PPE_KEEPALIVE_DUP_CPU) |
+ FIELD_PREP(MTK_PPE_TB_CFG_HASH_MODE, 1) |
+ FIELD_PREP(MTK_PPE_TB_CFG_SCAN_MODE,
+ MTK_PPE_SCAN_MODE_KEEPALIVE_AGE) |
+ FIELD_PREP(MTK_PPE_TB_CFG_ENTRY_NUM,
+ MTK_PPE_ENTRIES_SHIFT);
+ ppe_w32(ppe, MTK_PPE_TB_CFG, val);
+
+ ppe_w32(ppe, MTK_PPE_IP_PROTO_CHK,
+ MTK_PPE_IP_PROTO_CHK_IPV4 | MTK_PPE_IP_PROTO_CHK_IPV6);
+
+ mtk_ppe_cache_enable(ppe, true);
+
+ val = MTK_PPE_FLOW_CFG_IP4_TCP_FRAG |
+ MTK_PPE_FLOW_CFG_IP4_UDP_FRAG |
+ MTK_PPE_FLOW_CFG_IP6_3T_ROUTE |
+ MTK_PPE_FLOW_CFG_IP6_5T_ROUTE |
+ MTK_PPE_FLOW_CFG_IP6_6RD |
+ MTK_PPE_FLOW_CFG_IP4_NAT |
+ MTK_PPE_FLOW_CFG_IP4_NAPT |
+ MTK_PPE_FLOW_CFG_IP4_DSLITE |
+ MTK_PPE_FLOW_CFG_L2_BRIDGE |
+ MTK_PPE_FLOW_CFG_IP4_NAT_FRAG;
+ ppe_w32(ppe, MTK_PPE_FLOW_CFG, val);
+
+ val = FIELD_PREP(MTK_PPE_UNBIND_AGE_MIN_PACKETS, 1000) |
+ FIELD_PREP(MTK_PPE_UNBIND_AGE_DELTA, 3);
+ ppe_w32(ppe, MTK_PPE_UNBIND_AGE, val);
+
+ val = FIELD_PREP(MTK_PPE_BIND_AGE0_DELTA_UDP, 12) |
+ FIELD_PREP(MTK_PPE_BIND_AGE0_DELTA_NON_L4, 1);
+ ppe_w32(ppe, MTK_PPE_BIND_AGE0, val);
+
+ val = FIELD_PREP(MTK_PPE_BIND_AGE1_DELTA_TCP_FIN, 1) |
+ FIELD_PREP(MTK_PPE_BIND_AGE1_DELTA_TCP, 7);
+ ppe_w32(ppe, MTK_PPE_BIND_AGE1, val);
+
+ val = MTK_PPE_BIND_LIMIT0_QUARTER | MTK_PPE_BIND_LIMIT0_HALF;
+ ppe_w32(ppe, MTK_PPE_BIND_LIMIT0, val);
+
+ val = MTK_PPE_BIND_LIMIT1_FULL |
+ FIELD_PREP(MTK_PPE_BIND_LIMIT1_NON_L4, 1);
+ ppe_w32(ppe, MTK_PPE_BIND_LIMIT1, val);
+
+ val = FIELD_PREP(MTK_PPE_BIND_RATE_BIND, 30) |
+ FIELD_PREP(MTK_PPE_BIND_RATE_PREBIND, 1);
+ ppe_w32(ppe, MTK_PPE_BIND_RATE, val);
+
+ /* enable PPE */
+ val = MTK_PPE_GLO_CFG_EN |
+ MTK_PPE_GLO_CFG_IP4_L4_CS_DROP |
+ MTK_PPE_GLO_CFG_IP4_CS_DROP |
+ MTK_PPE_GLO_CFG_FLOW_DROP_UPDATE;
+ ppe_w32(ppe, MTK_PPE_GLO_CFG, val);
+
+ ppe_w32(ppe, MTK_PPE_DEFAULT_CPU_PORT, 0);
+
+ return 0;
+}
+
+int mtk_ppe_stop(struct mtk_ppe *ppe)
+{
+ u32 val;
+ int i;
+
+ for (i = 0; i < MTK_PPE_ENTRIES; i++)
+ ppe->foe_table[i].ib1 = FIELD_PREP(MTK_FOE_IB1_STATE,
+ MTK_FOE_STATE_INVALID);
+
+ mtk_ppe_cache_enable(ppe, false);
+
+ /* disable offload engine */
+ ppe_clear(ppe, MTK_PPE_GLO_CFG, MTK_PPE_GLO_CFG_EN);
+ ppe_w32(ppe, MTK_PPE_FLOW_CFG, 0);
+
+ /* disable aging */
+ val = MTK_PPE_TB_CFG_AGE_NON_L4 |
+ MTK_PPE_TB_CFG_AGE_UNBIND |
+ MTK_PPE_TB_CFG_AGE_TCP |
+ MTK_PPE_TB_CFG_AGE_UDP |
+ MTK_PPE_TB_CFG_AGE_TCP_FIN;
+ ppe_clear(ppe, MTK_PPE_TB_CFG, val);
+
+ return mtk_ppe_wait_busy(ppe);
+}
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
@@ -0,0 +1,274 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
+
+#ifndef __MTK_PPE_H
+#define __MTK_PPE_H
+
+#include <linux/kernel.h>
+#include <linux/bitfield.h>
+
+#define MTK_ETH_PPE_BASE 0xc00
+
+#define MTK_PPE_ENTRIES_SHIFT 3
+#define MTK_PPE_ENTRIES (1024 << MTK_PPE_ENTRIES_SHIFT)
+#define MTK_PPE_HASH_MASK (MTK_PPE_ENTRIES - 1)
+
+#define MTK_FOE_IB1_UNBIND_TIMESTAMP GENMASK(7, 0)
+#define MTK_FOE_IB1_UNBIND_PACKETS GENMASK(23, 8)
+#define MTK_FOE_IB1_UNBIND_PREBIND BIT(24)
+
+#define MTK_FOE_IB1_BIND_TIMESTAMP GENMASK(14, 0)
+#define MTK_FOE_IB1_BIND_KEEPALIVE BIT(15)
+#define MTK_FOE_IB1_BIND_VLAN_LAYER GENMASK(18, 16)
+#define MTK_FOE_IB1_BIND_PPPOE BIT(19)
+#define MTK_FOE_IB1_BIND_VLAN_TAG BIT(20)
+#define MTK_FOE_IB1_BIND_PKT_SAMPLE BIT(21)
+#define MTK_FOE_IB1_BIND_CACHE BIT(22)
+#define MTK_FOE_IB1_BIND_TUNNEL_DECAP BIT(23)
+#define MTK_FOE_IB1_BIND_TTL BIT(24)
+
+#define MTK_FOE_IB1_PACKET_TYPE GENMASK(27, 25)
+#define MTK_FOE_IB1_STATE GENMASK(29, 28)
+#define MTK_FOE_IB1_UDP BIT(30)
+#define MTK_FOE_IB1_STATIC BIT(31)
+
+enum {
+ MTK_PPE_PKT_TYPE_IPV4_HNAPT = 0,
+ MTK_PPE_PKT_TYPE_IPV4_ROUTE = 1,
+ MTK_PPE_PKT_TYPE_BRIDGE = 2,
+ MTK_PPE_PKT_TYPE_IPV4_DSLITE = 3,
+ MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T = 4,
+ MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T = 5,
+ MTK_PPE_PKT_TYPE_IPV6_6RD = 7,
+};
+
+#define MTK_FOE_IB2_QID GENMASK(3, 0)
+#define MTK_FOE_IB2_PSE_QOS BIT(4)
+#define MTK_FOE_IB2_DEST_PORT GENMASK(7, 5)
+#define MTK_FOE_IB2_MULTICAST BIT(8)
+
+#define MTK_FOE_IB2_WHNAT_QID2 GENMASK(13, 12)
+#define MTK_FOE_IB2_WHNAT_DEVIDX BIT(16)
+#define MTK_FOE_IB2_WHNAT_NAT BIT(17)
+
+#define MTK_FOE_IB2_PORT_MG GENMASK(17, 12)
+
+#define MTK_FOE_IB2_PORT_AG GENMASK(23, 18)
+
+#define MTK_FOE_IB2_DSCP GENMASK(31, 24)
+
+#define MTK_FOE_VLAN2_WHNAT_BSS GEMMASK(5, 0)
+#define MTK_FOE_VLAN2_WHNAT_WCID GENMASK(13, 6)
+#define MTK_FOE_VLAN2_WHNAT_RING GENMASK(15, 14)
+
+enum {
+ MTK_FOE_STATE_INVALID,
+ MTK_FOE_STATE_UNBIND,
+ MTK_FOE_STATE_BIND,
+ MTK_FOE_STATE_FIN
+};
+
+struct mtk_foe_mac_info {
+ u16 vlan1;
+ u16 etype;
+
+ u32 dest_mac_hi;
+
+ u16 vlan2;
+ u16 dest_mac_lo;
+
+ u32 src_mac_hi;
+
+ u16 pppoe_id;
+ u16 src_mac_lo;
+};
+
+struct mtk_foe_bridge {
+ u32 dest_mac_hi;
+
+ u16 src_mac_lo;
+ u16 dest_mac_lo;
+
+ u32 src_mac_hi;
+
+ u32 ib2;
+
+ u32 _rsv[5];
+
+ u32 udf_tsid;
+ struct mtk_foe_mac_info l2;
+};
+
+struct mtk_ipv4_tuple {
+ u32 src_ip;
+ u32 dest_ip;
+ union {
+ struct {
+ u16 dest_port;
+ u16 src_port;
+ };
+ struct {
+ u8 protocol;
+ u8 _pad[3]; /* fill with 0xa5a5a5 */
+ };
+ u32 ports;
+ };
+};
+
+struct mtk_foe_ipv4 {
+ struct mtk_ipv4_tuple orig;
+
+ u32 ib2;
+
+ struct mtk_ipv4_tuple new;
+
+ u16 timestamp;
+ u16 _rsv0[3];
+
+ u32 udf_tsid;
+
+ struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv4_dslite {
+ struct mtk_ipv4_tuple ip4;
+
+ u32 tunnel_src_ip[4];
+ u32 tunnel_dest_ip[4];
+
+ u8 flow_label[3];
+ u8 priority;
+
+ u32 udf_tsid;
+
+ u32 ib2;
+
+ struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv6 {
+ u32 src_ip[4];
+ u32 dest_ip[4];
+
+ union {
+ struct {
+ u8 protocol;
+ u8 _pad[3]; /* fill with 0xa5a5a5 */
+ }; /* 3-tuple */
+ struct {
+ u16 dest_port;
+ u16 src_port;
+ }; /* 5-tuple */
+ u32 ports;
+ };
+
+ u32 _rsv[3];
+
+ u32 udf;
+
+ u32 ib2;
+ struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_ipv6_6rd {
+ u32 src_ip[4];
+ u32 dest_ip[4];
+ u16 dest_port;
+ u16 src_port;
+
+ u32 tunnel_src_ip;
+ u32 tunnel_dest_ip;
+
+ u16 hdr_csum;
+ u8 dscp;
+ u8 ttl;
+
+ u8 flag;
+ u8 pad;
+ u8 per_flow_6rd_id;
+ u8 pad2;
+
+ u32 ib2;
+ struct mtk_foe_mac_info l2;
+};
+
+struct mtk_foe_entry {
+ u32 ib1;
+
+ union {
+ struct mtk_foe_bridge bridge;
+ struct mtk_foe_ipv4 ipv4;
+ struct mtk_foe_ipv4_dslite dslite;
+ struct mtk_foe_ipv6 ipv6;
+ struct mtk_foe_ipv6_6rd ipv6_6rd;
+ u32 data[19];
+ };
+};
+
+enum {
+ MTK_PPE_CPU_REASON_TTL_EXCEEDED = 0x02,
+ MTK_PPE_CPU_REASON_OPTION_HEADER = 0x03,
+ MTK_PPE_CPU_REASON_NO_FLOW = 0x07,
+ MTK_PPE_CPU_REASON_IPV4_FRAG = 0x08,
+ MTK_PPE_CPU_REASON_IPV4_DSLITE_FRAG = 0x09,
+ MTK_PPE_CPU_REASON_IPV4_DSLITE_NO_TCP_UDP = 0x0a,
+ MTK_PPE_CPU_REASON_IPV6_6RD_NO_TCP_UDP = 0x0b,
+ MTK_PPE_CPU_REASON_TCP_FIN_SYN_RST = 0x0c,
+ MTK_PPE_CPU_REASON_UN_HIT = 0x0d,
+ MTK_PPE_CPU_REASON_HIT_UNBIND = 0x0e,
+ MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED = 0x0f,
+ MTK_PPE_CPU_REASON_HIT_BIND_TCP_FIN = 0x10,
+ MTK_PPE_CPU_REASON_HIT_TTL_1 = 0x11,
+ MTK_PPE_CPU_REASON_HIT_BIND_VLAN_VIOLATION = 0x12,
+ MTK_PPE_CPU_REASON_KEEPALIVE_UC_OLD_HDR = 0x13,
+ MTK_PPE_CPU_REASON_KEEPALIVE_MC_NEW_HDR = 0x14,
+ MTK_PPE_CPU_REASON_KEEPALIVE_DUP_OLD_HDR = 0x15,
+ MTK_PPE_CPU_REASON_HIT_BIND_FORCE_CPU = 0x16,
+ MTK_PPE_CPU_REASON_TUNNEL_OPTION_HEADER = 0x17,
+ MTK_PPE_CPU_REASON_MULTICAST_TO_CPU = 0x18,
+ MTK_PPE_CPU_REASON_MULTICAST_TO_GMAC1_CPU = 0x19,
+ MTK_PPE_CPU_REASON_HIT_PRE_BIND = 0x1a,
+ MTK_PPE_CPU_REASON_PACKET_SAMPLING = 0x1b,
+ MTK_PPE_CPU_REASON_EXCEED_MTU = 0x1c,
+ MTK_PPE_CPU_REASON_PPE_BYPASS = 0x1e,
+ MTK_PPE_CPU_REASON_INVALID = 0x1f,
+};
+
+struct mtk_ppe {
+ struct device *dev;
+ void __iomem *base;
+ int version;
+
+ struct mtk_foe_entry *foe_table;
+ dma_addr_t foe_phys;
+
+ void *acct_table;
+};
+
+int mtk_ppe_init(struct mtk_ppe *ppe, struct device *dev, void __iomem *base,
+ int version);
+int mtk_ppe_start(struct mtk_ppe *ppe);
+int mtk_ppe_stop(struct mtk_ppe *ppe);
+
+static inline void
+mtk_foe_entry_clear(struct mtk_ppe *ppe, u16 hash)
+{
+ ppe->foe_table[hash].ib1 = 0;
+ dma_wmb();
+}
+
+int mtk_foe_entry_prepare(struct mtk_foe_entry *entry, int type, int l4proto,
+ u8 pse_port, u8 *src_mac, u8 *dest_mac);
+int mtk_foe_entry_set_ipv4_tuple(struct mtk_foe_entry *entry, bool orig,
+ __be32 src_addr, __be16 src_port,
+ __be32 dest_addr, __be16 dest_port);
+int mtk_foe_entry_set_ipv6_tuple(struct mtk_foe_entry *entry,
+ __be32 *src_addr, __be16 src_port,
+ __be32 *dest_addr, __be16 dest_port);
+int mtk_foe_entry_set_dsa(struct mtk_foe_entry *entry, int port);
+int mtk_foe_entry_set_vlan(struct mtk_foe_entry *entry, int vid);
+int mtk_foe_entry_set_pppoe(struct mtk_foe_entry *entry, int sid);
+int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_foe_entry *entry,
+ u16 timestamp);
+
+#endif
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_regs.h
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> */
+
+#ifndef __MTK_PPE_REGS_H
+#define __MTK_PPE_REGS_H
+
+#define MTK_PPE_GLO_CFG 0x200
+#define MTK_PPE_GLO_CFG_EN BIT(0)
+#define MTK_PPE_GLO_CFG_TSID_EN BIT(1)
+#define MTK_PPE_GLO_CFG_IP4_L4_CS_DROP BIT(2)
+#define MTK_PPE_GLO_CFG_IP4_CS_DROP BIT(3)
+#define MTK_PPE_GLO_CFG_TTL0_DROP BIT(4)
+#define MTK_PPE_GLO_CFG_PPE_BSWAP BIT(5)
+#define MTK_PPE_GLO_CFG_PSE_HASH_OFS BIT(6)
+#define MTK_PPE_GLO_CFG_MCAST_TB_EN BIT(7)
+#define MTK_PPE_GLO_CFG_FLOW_DROP_KA BIT(8)
+#define MTK_PPE_GLO_CFG_FLOW_DROP_UPDATE BIT(9)
+#define MTK_PPE_GLO_CFG_UDP_LITE_EN BIT(10)
+#define MTK_PPE_GLO_CFG_UDP_LEN_DROP BIT(11)
+#define MTK_PPE_GLO_CFG_MCAST_ENTRIES GNEMASK(13, 12)
+#define MTK_PPE_GLO_CFG_BUSY BIT(31)
+
+#define MTK_PPE_FLOW_CFG 0x204
+#define MTK_PPE_FLOW_CFG_IP4_TCP_FRAG BIT(6)
+#define MTK_PPE_FLOW_CFG_IP4_UDP_FRAG BIT(7)
+#define MTK_PPE_FLOW_CFG_IP6_3T_ROUTE BIT(8)
+#define MTK_PPE_FLOW_CFG_IP6_5T_ROUTE BIT(9)
+#define MTK_PPE_FLOW_CFG_IP6_6RD BIT(10)
+#define MTK_PPE_FLOW_CFG_IP4_NAT BIT(12)
+#define MTK_PPE_FLOW_CFG_IP4_NAPT BIT(13)
+#define MTK_PPE_FLOW_CFG_IP4_DSLITE BIT(14)
+#define MTK_PPE_FLOW_CFG_L2_BRIDGE BIT(15)
+#define MTK_PPE_FLOW_CFG_IP_PROTO_BLACKLIST BIT(16)
+#define MTK_PPE_FLOW_CFG_IP4_NAT_FRAG BIT(17)
+#define MTK_PPE_FLOW_CFG_IP4_HASH_FLOW_LABEL BIT(18)
+#define MTK_PPE_FLOW_CFG_IP4_HASH_GRE_KEY BIT(19)
+#define MTK_PPE_FLOW_CFG_IP6_HASH_GRE_KEY BIT(20)
+
+#define MTK_PPE_IP_PROTO_CHK 0x208
+#define MTK_PPE_IP_PROTO_CHK_IPV4 GENMASK(15, 0)
+#define MTK_PPE_IP_PROTO_CHK_IPV6 GENMASK(31, 16)
+
+#define MTK_PPE_TB_CFG 0x21c
+#define MTK_PPE_TB_CFG_ENTRY_NUM GENMASK(2, 0)
+#define MTK_PPE_TB_CFG_ENTRY_80B BIT(3)
+#define MTK_PPE_TB_CFG_SEARCH_MISS GENMASK(5, 4)
+#define MTK_PPE_TB_CFG_AGE_PREBIND BIT(6)
+#define MTK_PPE_TB_CFG_AGE_NON_L4 BIT(7)
+#define MTK_PPE_TB_CFG_AGE_UNBIND BIT(8)
+#define MTK_PPE_TB_CFG_AGE_TCP BIT(9)
+#define MTK_PPE_TB_CFG_AGE_UDP BIT(10)
+#define MTK_PPE_TB_CFG_AGE_TCP_FIN BIT(11)
+#define MTK_PPE_TB_CFG_KEEPALIVE GENMASK(13, 12)
+#define MTK_PPE_TB_CFG_HASH_MODE GENMASK(15, 14)
+#define MTK_PPE_TB_CFG_SCAN_MODE GENMASK(17, 16)
+#define MTK_PPE_TB_CFG_HASH_DEBUG GENMASK(19, 18)
+
+enum {
+ MTK_PPE_SCAN_MODE_DISABLED,
+ MTK_PPE_SCAN_MODE_CHECK_AGE,
+ MTK_PPE_SCAN_MODE_KEEPALIVE_AGE,
+};
+
+enum {
+ MTK_PPE_KEEPALIVE_DISABLE,
+ MTK_PPE_KEEPALIVE_UNICAST_CPU,
+ MTK_PPE_KEEPALIVE_DUP_CPU = 3,
+};
+
+enum {
+ MTK_PPE_SEARCH_MISS_ACTION_DROP,
+ MTK_PPE_SEARCH_MISS_ACTION_FORWARD = 2,
+ MTK_PPE_SEARCH_MISS_ACTION_FORWARD_BUILD = 3,
+};
+
+#define MTK_PPE_TB_BASE 0x220
+
+#define MTK_PPE_TB_USED 0x224
+#define MTK_PPE_TB_USED_NUM GENMASK(13, 0)
+
+#define MTK_PPE_BIND_RATE 0x228
+#define MTK_PPE_BIND_RATE_BIND GENMASK(15, 0)
+#define MTK_PPE_BIND_RATE_PREBIND GENMASK(31, 16)
+
+#define MTK_PPE_BIND_LIMIT0 0x22c
+#define MTK_PPE_BIND_LIMIT0_QUARTER GENMASK(13, 0)
+#define MTK_PPE_BIND_LIMIT0_HALF GENMASK(29, 16)
+
+#define MTK_PPE_BIND_LIMIT1 0x230
+#define MTK_PPE_BIND_LIMIT1_FULL GENMASK(13, 0)
+#define MTK_PPE_BIND_LIMIT1_NON_L4 GENMASK(23, 16)
+
+#define MTK_PPE_KEEPALIVE 0x234
+#define MTK_PPE_KEEPALIVE_TIME GENMASK(15, 0)
+#define MTK_PPE_KEEPALIVE_TIME_TCP GENMASK(23, 16)
+#define MTK_PPE_KEEPALIVE_TIME_UDP GENMASK(31, 24)
+
+#define MTK_PPE_UNBIND_AGE 0x238
+#define MTK_PPE_UNBIND_AGE_MIN_PACKETS GENMASK(31, 16)
+#define MTK_PPE_UNBIND_AGE_DELTA GENMASK(7, 0)
+
+#define MTK_PPE_BIND_AGE0 0x23c
+#define MTK_PPE_BIND_AGE0_DELTA_NON_L4 GENMASK(30, 16)
+#define MTK_PPE_BIND_AGE0_DELTA_UDP GENMASK(14, 0)
+
+#define MTK_PPE_BIND_AGE1 0x240
+#define MTK_PPE_BIND_AGE1_DELTA_TCP_FIN GENMASK(30, 16)
+#define MTK_PPE_BIND_AGE1_DELTA_TCP GENMASK(14, 0)
+
+#define MTK_PPE_HASH_SEED 0x244
+
+#define MTK_PPE_DEFAULT_CPU_PORT 0x248
+#define MTK_PPE_DEFAULT_CPU_PORT_MASK(_n) (GENMASK(2, 0) << ((_n) * 4))
+
+#define MTK_PPE_MTU_DROP 0x308
+
+#define MTK_PPE_VLAN_MTU0 0x30c
+#define MTK_PPE_VLAN_MTU0_NONE GENMASK(13, 0)
+#define MTK_PPE_VLAN_MTU0_1TAG GENMASK(29, 16)
+
+#define MTK_PPE_VLAN_MTU1 0x310
+#define MTK_PPE_VLAN_MTU1_2TAG GENMASK(13, 0)
+#define MTK_PPE_VLAN_MTU1_3TAG GENMASK(29, 16)
+
+#define MTK_PPE_VPM_TPID 0x318
+
+#define MTK_PPE_CACHE_CTL 0x320
+#define MTK_PPE_CACHE_CTL_EN BIT(0)
+#define MTK_PPE_CACHE_CTL_LOCK_CLR BIT(4)
+#define MTK_PPE_CACHE_CTL_REQ BIT(8)
+#define MTK_PPE_CACHE_CTL_CLEAR BIT(9)
+#define MTK_PPE_CACHE_CTL_CMD GENMASK(13, 12)
+
+#define MTK_PPE_MIB_CFG 0x334
+#define MTK_PPE_MIB_CFG_EN BIT(0)
+#define MTK_PPE_MIB_CFG_RD_CLR BIT(1)
+
+#define MTK_PPE_MIB_TB_BASE 0x338
+
+#define MTK_PPE_MIB_CACHE_CTL 0x350
+#define MTK_PPE_MIB_CACHE_CTL_EN BIT(0)
+#define MTK_PPE_MIB_CACHE_CTL_FLUSH BIT(2)
+
+#endif
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