--- /dev/null
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * 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.
+ *
+ * Copyright (C) 2014-2016 Sean Wang <sean.wang@mediatek.com>
+ * Copyright (C) 2016-2017 John Crispin <blogic@openwrt.org>
+ */
+
+#include "mtk_offload.h"
+
+static const char *mtk_foe_entry_state_str[] = {
+ "INVALID",
+ "UNBIND",
+ "BIND",
+ "FIN"
+};
+
+static const char *mtk_foe_packet_type_str[] = {
+ "IPV4_HNAPT",
+ "IPV4_HNAT",
+ "IPV6_1T_ROUTE",
+ "IPV4_DSLITE",
+ "IPV6_3T_ROUTE",
+ "IPV6_5T_ROUTE",
+ "IPV6_6RD",
+};
+
+#define IPV4_HNAPT 0
+#define IPV4_HNAT 1
+#define IS_IPV4_HNAPT(x) (((x)->bfib1.pkt_type == IPV4_HNAPT) ? 1: 0)
+struct mtk_eth *_eth;
+#define es(entry) (mtk_foe_entry_state_str[entry->bfib1.state])
+//#define ei(entry, end) (MTK_PPE_TBL_SZ - (int)(end - entry))
+#define ei(entry, end) (MTK_PPE_ENTRY_CNT - (int)(end - entry))
+#define pt(entry) (mtk_foe_packet_type_str[entry->ipv4_hnapt.bfib1.pkt_type])
+
+static int mtk_ppe_debugfs_foe_show(struct seq_file *m, void *private)
+{
+ struct mtk_eth *eth = _eth;
+ struct mtk_foe_entry *entry, *end;
+ int i = 0;
+
+ entry = eth->foe_table;
+ end = eth->foe_table + MTK_PPE_ENTRY_CNT;
+
+ while (entry < end) {
+ if (IS_IPV4_HNAPT(entry)) {
+ __be32 saddr = htonl(entry->ipv4_hnapt.sip);
+ __be32 daddr = htonl(entry->ipv4_hnapt.dip);
+ __be32 nsaddr = htonl(entry->ipv4_hnapt.new_sip);
+ __be32 ndaddr = htonl(entry->ipv4_hnapt.new_dip);
+ unsigned char h_dest[ETH_ALEN];
+ unsigned char h_source[ETH_ALEN];
+
+ *((u32*) h_source) = swab32(entry->ipv4_hnapt.smac_hi);
+ *((u16*) &h_source[4]) = swab16(entry->ipv4_hnapt.smac_lo);
+ *((u32*) h_dest) = swab32(entry->ipv4_hnapt.dmac_hi);
+ *((u16*) &h_dest[4]) = swab16(entry->ipv4_hnapt.dmac_lo);
+ seq_printf(m,
+ "(%x)0x%05x|state=%s|type=%s|"
+ "%pI4:%d->%pI4:%d=>%pI4:%d->%pI4:%d|%pM=>%pM|"
+ "etype=0x%04x|info1=0x%x|info2=0x%x|"
+ "vlan1=%d|vlan2=%d\n",
+ i,
+ ei(entry, end), es(entry), pt(entry),
+ &saddr, entry->ipv4_hnapt.sport,
+ &daddr, entry->ipv4_hnapt.dport,
+ &nsaddr, entry->ipv4_hnapt.new_sport,
+ &ndaddr, entry->ipv4_hnapt.new_dport, h_source,
+ h_dest, ntohs(entry->ipv4_hnapt.etype),
+ entry->ipv4_hnapt.info_blk1,
+ entry->ipv4_hnapt.info_blk2,
+ entry->ipv4_hnapt.vlan1,
+ entry->ipv4_hnapt.vlan2);
+ } else
+ seq_printf(m, "0x%05x state=%s\n",
+ ei(entry, end), es(entry));
+ entry++;
+ i++;
+ }
+
+ return 0;
+}
+
+static int mtk_ppe_debugfs_foe_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mtk_ppe_debugfs_foe_show, file->private_data);
+}
+
+static const struct file_operations mtk_ppe_debugfs_foe_fops = {
+ .open = mtk_ppe_debugfs_foe_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int mtk_ppe_debugfs_init(struct mtk_eth *eth)
+{
+ struct dentry *root;
+
+ _eth = eth;
+
+ root = debugfs_create_dir("mtk_ppe", NULL);
+ if (!root)
+ return -ENOMEM;
+
+ debugfs_create_file("all_entry", S_IRUGO, root, eth, &mtk_ppe_debugfs_foe_fops);
+
+ return 0;
+}
--- /dev/null
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * 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.
+ *
+ * Copyright (C) 2018 John Crispin <john@phrozen.org>
+ */
+
+#include "mtk_offload.h"
+
+#define INVALID 0
+#define UNBIND 1
+#define BIND 2
+#define FIN 3
+
+#define IPV4_HNAPT 0
+#define IPV4_HNAT 1
+
+static u32
+mtk_flow_hash_v4(struct flow_offload_tuple *tuple)
+{
+ u32 ports = ntohs(tuple->src_port) << 16 | ntohs(tuple->dst_port);
+ u32 src = ntohl(tuple->dst_v4.s_addr);
+ u32 dst = ntohl(tuple->src_v4.s_addr);
+ u32 hash = (ports & src) | ((~ports) & dst);
+ u32 hash_23_0 = hash & 0xffffff;
+ u32 hash_31_24 = hash & 0xff000000;
+
+ hash = ports ^ src ^ dst ^ ((hash_23_0 << 8) | (hash_31_24 >> 24));
+ hash = ((hash & 0xffff0000) >> 16 ) ^ (hash & 0xfffff);
+ hash &= 0x7ff;
+ hash *= 2;;
+
+ return hash;
+}
+
+static int
+mtk_foe_prepare_v4(struct mtk_foe_entry *entry,
+ struct flow_offload_tuple *tuple,
+ struct flow_offload_tuple *dest_tuple,
+ struct flow_offload_hw_path *src,
+ struct flow_offload_hw_path *dest)
+{
+ int is_mcast = !!is_multicast_ether_addr(dest->eth_dest);
+
+ if (tuple->l4proto == IPPROTO_UDP)
+ entry->ipv4_hnapt.bfib1.udp = 1;
+
+ entry->ipv4_hnapt.etype = htons(ETH_P_IP);
+ entry->ipv4_hnapt.bfib1.pkt_type = IPV4_HNAPT;
+ entry->ipv4_hnapt.iblk2.fqos = 0;
+ entry->ipv4_hnapt.bfib1.ttl = 1;
+ entry->ipv4_hnapt.bfib1.cah = 1;
+ entry->ipv4_hnapt.bfib1.ka = 1;
+ entry->ipv4_hnapt.iblk2.mcast = is_mcast;
+ entry->ipv4_hnapt.iblk2.dscp = 0;
+ entry->ipv4_hnapt.iblk2.port_mg = 0x3f;
+ entry->ipv4_hnapt.iblk2.port_ag = 0x1f;
+#ifdef CONFIG_NET_MEDIATEK_HW_QOS
+ entry->ipv4_hnapt.iblk2.qid = 1;
+ entry->ipv4_hnapt.iblk2.fqos = 1;
+#endif
+#ifdef CONFIG_RALINK
+ entry->ipv4_hnapt.iblk2.dp = 1;
+ if ((dest->flags & FLOW_OFFLOAD_PATH_VLAN) && (dest->vlan_id > 1))
+ entry->ipv4_hnapt.iblk2.qid += 8;
+#else
+ entry->ipv4_hnapt.iblk2.dp = (dest->dev->name[3] - '0') + 1;
+#endif
+
+ entry->ipv4_hnapt.sip = ntohl(tuple->src_v4.s_addr);
+ entry->ipv4_hnapt.dip = ntohl(tuple->dst_v4.s_addr);
+ entry->ipv4_hnapt.sport = ntohs(tuple->src_port);
+ entry->ipv4_hnapt.dport = ntohs(tuple->dst_port);
+
+ entry->ipv4_hnapt.new_sip = ntohl(dest_tuple->dst_v4.s_addr);
+ entry->ipv4_hnapt.new_dip = ntohl(dest_tuple->src_v4.s_addr);
+ entry->ipv4_hnapt.new_sport = ntohs(dest_tuple->dst_port);
+ entry->ipv4_hnapt.new_dport = ntohs(dest_tuple->src_port);
+
+ entry->bfib1.state = BIND;
+
+ if (dest->flags & FLOW_OFFLOAD_PATH_PPPOE) {
+ entry->bfib1.psn = 1;
+ entry->ipv4_hnapt.etype = htons(ETH_P_PPP_SES);
+ entry->ipv4_hnapt.pppoe_id = dest->pppoe_sid;
+ }
+
+ if (dest->flags & FLOW_OFFLOAD_PATH_VLAN) {
+ entry->ipv4_hnapt.vlan1 = dest->vlan_id;
+ entry->bfib1.vlan_layer = 1;
+
+ switch (dest->vlan_proto) {
+ case htons(ETH_P_8021Q):
+ entry->ipv4_hnapt.bfib1.vpm = 1;
+ break;
+ case htons(ETH_P_8021AD):
+ entry->ipv4_hnapt.bfib1.vpm = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static void
+mtk_foe_set_mac(struct mtk_foe_entry *entry, u8 *smac, u8 *dmac)
+{
+ entry->ipv4_hnapt.dmac_hi = swab32(*((u32*) dmac));
+ entry->ipv4_hnapt.dmac_lo = swab16(*((u16*) &dmac[4]));
+ entry->ipv4_hnapt.smac_hi = swab32(*((u32*) smac));
+ entry->ipv4_hnapt.smac_lo = swab16(*((u16*) &smac[4]));
+}
+
+static void
+mtk_foe_write(struct mtk_eth *eth, u32 hash,
+ struct mtk_foe_entry *entry)
+{
+ struct mtk_foe_entry *table = (struct mtk_foe_entry *)eth->foe_table;
+
+ memcpy(&table[hash], entry, sizeof(*entry));
+}
+
+int mtk_flow_offload(struct mtk_eth *eth,
+ enum flow_offload_type type,
+ struct flow_offload *flow,
+ struct flow_offload_hw_path *src,
+ struct flow_offload_hw_path *dest)
+{
+ struct flow_offload_tuple *otuple = &flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple;
+ struct flow_offload_tuple *rtuple = &flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple;
+ u32 time_stamp = mtk_r32(eth, 0x0010) & (0x7fff);
+ u32 ohash, rhash;
+ struct mtk_foe_entry orig = {
+ .bfib1.time_stamp = time_stamp,
+ .bfib1.psn = 0,
+ };
+ struct mtk_foe_entry reply = {
+ .bfib1.time_stamp = time_stamp,
+ .bfib1.psn = 0,
+ };
+
+ if (otuple->l4proto != IPPROTO_TCP && otuple->l4proto != IPPROTO_UDP)
+ return -EINVAL;
+
+ switch (otuple->l3proto) {
+ case AF_INET:
+ if (mtk_foe_prepare_v4(&orig, otuple, rtuple, src, dest) ||
+ mtk_foe_prepare_v4(&reply, rtuple, otuple, dest, src))
+ return -EINVAL;
+
+ ohash = mtk_flow_hash_v4(otuple);
+ rhash = mtk_flow_hash_v4(rtuple);
+ break;
+
+ case AF_INET6:
+ return -EINVAL;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (type == FLOW_OFFLOAD_DEL) {
+ orig.bfib1.state = INVALID;
+ reply.bfib1.state = INVALID;
+ flow = NULL;
+ goto write;
+ }
+
+ mtk_foe_set_mac(&orig, dest->eth_src, dest->eth_dest);
+ mtk_foe_set_mac(&reply, src->eth_src, src->eth_dest);
+
+write:
+ mtk_foe_write(eth, ohash, &orig);
+ mtk_foe_write(eth, rhash, &reply);
+ rcu_assign_pointer(eth->foe_flow_table[ohash], flow);
+ rcu_assign_pointer(eth->foe_flow_table[rhash], flow);
+
+ if (type == FLOW_OFFLOAD_DEL)
+ synchronize_rcu();
+
+ return 0;
+}
+
+#ifdef CONFIG_NET_MEDIATEK_HW_QOS
+
+#define QDMA_TX_SCH_TX 0x1a14
+
+static void mtk_ppe_scheduler(struct mtk_eth *eth, int id, u32 rate)
+{
+ int exp = 0, shift = 0;
+ u32 reg = mtk_r32(eth, QDMA_TX_SCH_TX);
+ u32 val = 0;
+
+ if (rate)
+ val = BIT(11);
+
+ while (rate > 127) {
+ rate /= 10;
+ exp++;
+ }
+
+ val |= (rate & 0x7f) << 4;
+ val |= exp & 0xf;
+ if (id)
+ shift = 16;
+ reg &= ~(0xffff << shift);
+ reg |= val << shift;
+ mtk_w32(eth, val, QDMA_TX_SCH_TX);
+}
+
+#define QTX_CFG(x) (0x1800 + (x * 0x10))
+#define QTX_SCH(x) (0x1804 + (x * 0x10))
+
+static void mtk_ppe_queue(struct mtk_eth *eth, int id, int sched, int weight, int resv, u32 min_rate, u32 max_rate)
+{
+ int max_exp = 0, min_exp = 0;
+ u32 reg;
+
+ if (id >= 16)
+ return;
+
+ reg = mtk_r32(eth, QTX_SCH(id));
+ reg &= 0x70000000;
+
+ if (sched)
+ reg |= BIT(31);
+
+ if (min_rate)
+ reg |= BIT(27);
+
+ if (max_rate)
+ reg |= BIT(11);
+
+ while (max_rate > 127) {
+ max_rate /= 10;
+ max_exp++;
+ }
+
+ while (min_rate > 127) {
+ min_rate /= 10;
+ min_exp++;
+ }
+
+ reg |= (min_rate & 0x7f) << 20;
+ reg |= (min_exp & 0xf) << 16;
+ reg |= (weight & 0xf) << 12;
+ reg |= (max_rate & 0x7f) << 4;
+ reg |= max_exp & 0xf;
+ mtk_w32(eth, reg, QTX_SCH(id));
+
+ resv &= 0xff;
+ reg = mtk_r32(eth, QTX_CFG(id));
+ reg &= 0xffff0000;
+ reg |= (resv << 8) | resv;
+ mtk_w32(eth, reg, QTX_CFG(id));
+}
+#endif
+
+static int mtk_init_foe_table(struct mtk_eth *eth)
+{
+ if (eth->foe_table)
+ return 0;
+
+ eth->foe_flow_table = devm_kcalloc(eth->dev, MTK_PPE_ENTRY_CNT,
+ sizeof(*eth->foe_flow_table),
+ GFP_KERNEL);
+ if (!eth->foe_flow_table)
+ return -EINVAL;
+
+ /* map the FOE table */
+ eth->foe_table = dmam_alloc_coherent(eth->dev, MTK_PPE_TBL_SZ,
+ ð->foe_table_phys, GFP_KERNEL);
+ if (!eth->foe_table) {
+ dev_err(eth->dev, "failed to allocate foe table\n");
+ kfree(eth->foe_flow_table);
+ return -ENOMEM;
+ }
+
+
+ return 0;
+}
+
+static int mtk_ppe_start(struct mtk_eth *eth)
+{
+ int ret;
+
+ ret = mtk_init_foe_table(eth);
+ if (ret)
+ return ret;
+
+ /* tell the PPE about the tables base address */
+ mtk_w32(eth, eth->foe_table_phys, MTK_REG_PPE_TB_BASE);
+
+ /* flush the table */
+ memset(eth->foe_table, 0, MTK_PPE_TBL_SZ);
+
+ /* setup hashing */
+ mtk_m32(eth,
+ MTK_PPE_TB_CFG_HASH_MODE_MASK | MTK_PPE_TB_CFG_TBL_SZ_MASK,
+ MTK_PPE_TB_CFG_HASH_MODE1 | MTK_PPE_TB_CFG_TBL_SZ_4K,
+ MTK_REG_PPE_TB_CFG);
+
+ /* set the default hashing seed */
+ mtk_w32(eth, MTK_PPE_HASH_SEED, MTK_REG_PPE_HASH_SEED);
+
+ /* each foe entry is 64bytes and is setup by cpu forwarding*/
+ mtk_m32(eth, MTK_PPE_CAH_CTRL_X_MODE | MTK_PPE_TB_CFG_ENTRY_SZ_MASK |
+ MTK_PPE_TB_CFG_SMA_MASK,
+ MTK_PPE_TB_CFG_ENTRY_SZ_64B | MTK_PPE_TB_CFG_SMA_FWD_CPU,
+ MTK_REG_PPE_TB_CFG);
+
+ /* set ip proto */
+ mtk_w32(eth, 0xFFFFFFFF, MTK_REG_PPE_IP_PROT_CHK);
+
+ /* setup caching */
+ mtk_m32(eth, 0, MTK_PPE_CAH_CTRL_X_MODE, MTK_REG_PPE_CAH_CTRL);
+ mtk_m32(eth, MTK_PPE_CAH_CTRL_X_MODE, MTK_PPE_CAH_CTRL_EN,
+ MTK_REG_PPE_CAH_CTRL);
+
+ /* enable FOE */
+ mtk_m32(eth, 0, MTK_PPE_FLOW_CFG_IPV4_NAT_FRAG_EN |
+ MTK_PPE_FLOW_CFG_IPV4_NAPT_EN | MTK_PPE_FLOW_CFG_IPV4_NAT_EN |
+ MTK_PPE_FLOW_CFG_IPV4_GREK_EN,
+ MTK_REG_PPE_FLOW_CFG);
+
+ /* setup flow entry un/bind aging */
+ mtk_m32(eth, 0,
+ MTK_PPE_TB_CFG_UNBD_AGE | MTK_PPE_TB_CFG_NTU_AGE |
+ MTK_PPE_TB_CFG_FIN_AGE | MTK_PPE_TB_CFG_UDP_AGE |
+ MTK_PPE_TB_CFG_TCP_AGE,
+ MTK_REG_PPE_TB_CFG);
+
+ mtk_m32(eth, MTK_PPE_UNB_AGE_MNP_MASK | MTK_PPE_UNB_AGE_DLTA_MASK,
+ MTK_PPE_UNB_AGE_MNP | MTK_PPE_UNB_AGE_DLTA,
+ MTK_REG_PPE_UNB_AGE);
+ mtk_m32(eth, MTK_PPE_BND_AGE0_NTU_DLTA_MASK |
+ MTK_PPE_BND_AGE0_UDP_DLTA_MASK,
+ MTK_PPE_BND_AGE0_NTU_DLTA | MTK_PPE_BND_AGE0_UDP_DLTA,
+ MTK_REG_PPE_BND_AGE0);
+ mtk_m32(eth, MTK_PPE_BND_AGE1_FIN_DLTA_MASK |
+ MTK_PPE_BND_AGE1_TCP_DLTA_MASK,
+ MTK_PPE_BND_AGE1_FIN_DLTA | MTK_PPE_BND_AGE1_TCP_DLTA,
+ MTK_REG_PPE_BND_AGE1);
+
+ /* setup flow entry keep alive */
+ mtk_m32(eth, MTK_PPE_TB_CFG_KA_MASK, MTK_PPE_TB_CFG_KA,
+ MTK_REG_PPE_TB_CFG);
+ mtk_w32(eth, MTK_PPE_KA_UDP | MTK_PPE_KA_TCP | MTK_PPE_KA_T, MTK_REG_PPE_KA);
+
+ /* setup flow entry rate limit */
+ mtk_w32(eth, (0x3fff << 16) | 0x3fff, MTK_REG_PPE_BIND_LMT_0);
+ mtk_w32(eth, MTK_PPE_NTU_KA | 0x3fff, MTK_REG_PPE_BIND_LMT_1);
+ mtk_m32(eth, MTK_PPE_BNDR_RATE_MASK, 1, MTK_REG_PPE_BNDR);
+
+ /* enable the PPE */
+ mtk_m32(eth, 0, MTK_PPE_GLO_CFG_EN, MTK_REG_PPE_GLO_CFG);
+
+#ifdef CONFIG_RALINK
+ /* set the default forwarding port to QDMA */
+ mtk_w32(eth, 0x0, MTK_REG_PPE_DFT_CPORT);
+#else
+ /* set the default forwarding port to QDMA */
+ mtk_w32(eth, 0x55555555, MTK_REG_PPE_DFT_CPORT);
+#endif
+
+ /* drop packets with TTL=0 */
+ mtk_m32(eth, 0, MTK_PPE_GLO_CFG_TTL0_DROP, MTK_REG_PPE_GLO_CFG);
+
+ /* send all traffic from gmac to the ppe */
+ mtk_m32(eth, 0xffff, 0x4444, MTK_GDMA_FWD_CFG(0));
+ mtk_m32(eth, 0xffff, 0x4444, MTK_GDMA_FWD_CFG(1));
+
+ dev_info(eth->dev, "PPE started\n");
+
+#ifdef CONFIG_NET_MEDIATEK_HW_QOS
+ mtk_ppe_scheduler(eth, 0, 500000);
+ mtk_ppe_scheduler(eth, 1, 500000);
+ mtk_ppe_queue(eth, 0, 0, 7, 32, 250000, 0);
+ mtk_ppe_queue(eth, 1, 0, 7, 32, 250000, 0);
+ mtk_ppe_queue(eth, 8, 1, 7, 32, 250000, 0);
+ mtk_ppe_queue(eth, 9, 1, 7, 32, 250000, 0);
+#endif
+
+ return 0;
+}
+
+static int mtk_ppe_busy_wait(struct mtk_eth *eth)
+{
+ unsigned long t_start = jiffies;
+ u32 r = 0;
+
+ while (1) {
+ r = mtk_r32(eth, MTK_REG_PPE_GLO_CFG);
+ if (!(r & MTK_PPE_GLO_CFG_BUSY))
+ return 0;
+ if (time_after(jiffies, t_start + HZ))
+ break;
+ usleep_range(10, 20);
+ }
+
+ dev_err(eth->dev, "ppe: table busy timeout - resetting\n");
+ reset_control_reset(eth->rst_ppe);
+
+ return -ETIMEDOUT;
+}
+
+static int mtk_ppe_stop(struct mtk_eth *eth)
+{
+ u32 r1 = 0, r2 = 0;
+ int i;
+
+ /* discard all traffic while we disable the PPE */
+ mtk_m32(eth, 0xffff, 0x7777, MTK_GDMA_FWD_CFG(0));
+ mtk_m32(eth, 0xffff, 0x7777, MTK_GDMA_FWD_CFG(1));
+
+ if (mtk_ppe_busy_wait(eth))
+ return -ETIMEDOUT;
+
+ /* invalidate all flow table entries */
+ for (i = 0; i < MTK_PPE_ENTRY_CNT; i++)
+ eth->foe_table[i].bfib1.state = FOE_STATE_INVALID;
+
+ /* disable caching */
+ mtk_m32(eth, 0, MTK_PPE_CAH_CTRL_X_MODE, MTK_REG_PPE_CAH_CTRL);
+ mtk_m32(eth, MTK_PPE_CAH_CTRL_X_MODE | MTK_PPE_CAH_CTRL_EN, 0,
+ MTK_REG_PPE_CAH_CTRL);
+
+ /* flush cache has to be ahead of hnat diable --*/
+ mtk_m32(eth, MTK_PPE_GLO_CFG_EN, 0, MTK_REG_PPE_GLO_CFG);
+
+ /* disable FOE */
+ mtk_m32(eth,
+ MTK_PPE_FLOW_CFG_IPV4_NAT_FRAG_EN |
+ MTK_PPE_FLOW_CFG_IPV4_NAPT_EN | MTK_PPE_FLOW_CFG_IPV4_NAT_EN |
+ MTK_PPE_FLOW_CFG_FUC_FOE | MTK_PPE_FLOW_CFG_FMC_FOE,
+ 0, MTK_REG_PPE_FLOW_CFG);
+
+ /* disable FOE aging */
+ mtk_m32(eth, 0,
+ MTK_PPE_TB_CFG_FIN_AGE | MTK_PPE_TB_CFG_UDP_AGE |
+ MTK_PPE_TB_CFG_TCP_AGE | MTK_PPE_TB_CFG_UNBD_AGE |
+ MTK_PPE_TB_CFG_NTU_AGE, MTK_REG_PPE_TB_CFG);
+
+ r1 = mtk_r32(eth, 0x100);
+ r2 = mtk_r32(eth, 0x10c);
+
+ dev_info(eth->dev, "0x100 = 0x%x, 0x10c = 0x%x\n", r1, r2);
+
+ if (((r1 & 0xff00) >> 0x8) >= (r1 & 0xff) ||
+ ((r1 & 0xff00) >> 0x8) >= (r2 & 0xff)) {
+ dev_info(eth->dev, "reset pse\n");
+ mtk_w32(eth, 0x1, 0x4);
+ }
+
+ /* set the foe entry base address to 0 */
+ mtk_w32(eth, 0, MTK_REG_PPE_TB_BASE);
+
+ if (mtk_ppe_busy_wait(eth))
+ return -ETIMEDOUT;
+
+ /* send all traffic back to the DMA engine */
+#ifdef CONFIG_RALINK
+ mtk_m32(eth, 0xffff, 0x0, MTK_GDMA_FWD_CFG(0));
+ mtk_m32(eth, 0xffff, 0x0, MTK_GDMA_FWD_CFG(1));
+#else
+ mtk_m32(eth, 0xffff, 0x5555, MTK_GDMA_FWD_CFG(0));
+ mtk_m32(eth, 0xffff, 0x5555, MTK_GDMA_FWD_CFG(1));
+#endif
+ return 0;
+}
+
+static void mtk_offload_keepalive(struct fe_priv *eth, unsigned int hash)
+{
+ struct flow_offload *flow;
+
+ rcu_read_lock();
+ flow = rcu_dereference(eth->foe_flow_table[hash]);
+ if (flow)
+ flow->timeout = jiffies + 30 * HZ;
+ rcu_read_unlock();
+}
+
+int mtk_offload_check_rx(struct fe_priv *eth, struct sk_buff *skb, u32 rxd4)
+{
+ unsigned int hash;
+
+ switch (FIELD_GET(MTK_RXD4_CPU_REASON, rxd4)) {
+ case MTK_CPU_REASON_KEEPALIVE_UC_OLD_HDR:
+ case MTK_CPU_REASON_KEEPALIVE_MC_NEW_HDR:
+ case MTK_CPU_REASON_KEEPALIVE_DUP_OLD_HDR:
+ hash = FIELD_GET(MTK_RXD4_FOE_ENTRY, rxd4);
+ mtk_offload_keepalive(eth, hash);
+ return -1;
+ case MTK_CPU_REASON_PACKET_SAMPLING:
+ return -1;
+ default:
+ return 0;
+ }
+}
+
+int mtk_ppe_probe(struct mtk_eth *eth)
+{
+ int err;
+
+ err = mtk_ppe_start(eth);
+ if (err)
+ return err;
+
+ err = mtk_ppe_debugfs_init(eth);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+void mtk_ppe_remove(struct mtk_eth *eth)
+{
+ mtk_ppe_stop(eth);
+}
--- /dev/null
+/* This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * 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.
+ *
+ * Copyright (C) 2014-2016 Sean Wang <sean.wang@mediatek.com>
+ * Copyright (C) 2016-2017 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/if.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/netfilter.h>
+#include <linux/netdevice.h>
+#include <net/netfilter/nf_flow_table.h>
+#include <linux/debugfs.h>
+#include <linux/etherdevice.h>
+#include <linux/bitfield.h>
+
+#include "mtk_eth_soc.h"
+
+#ifdef CONFIG_RALINK
+/* ramips compat */
+#define mtk_eth fe_priv
+#define MTK_GDMA_FWD_CFG(x) (0x500 + (x * 0x1000))
+#define mtk_m32 fe_m32
+
+static inline u32
+mtk_r32(struct mtk_eth *eth, u32 reg)
+{
+ return fe_r32(reg);
+}
+
+static inline void
+mtk_w32(struct mtk_eth *eth, u32 val, u32 reg)
+{
+ fe_w32(val, reg);
+}
+#endif
+
+#define MTK_REG_PPE_GLO_CFG 0xe00
+#define MTK_PPE_GLO_CFG_BUSY BIT(31)
+#define MTK_PPE_GLO_CFG_TTL0_DROP BIT(4)
+#define MTK_PPE_GLO_CFG_EN BIT(0)
+
+#define MTK_REG_PPE_FLOW_CFG 0xe04
+#define MTK_PPE_FLOW_CFG_IPV4_GREK_EN BIT(19)
+#define MTK_PPE_FLOW_CFG_IPV4_NAT_FRAG_EN BIT(17)
+#define MTK_PPE_FLOW_CFG_IPV4_NAPT_EN BIT(13)
+#define MTK_PPE_FLOW_CFG_IPV4_NAT_EN BIT(12)
+#define MTK_PPE_FLOW_CFG_FUC_FOE BIT(2)
+#define MTK_PPE_FLOW_CFG_FMC_FOE BIT(1)
+
+#define MTK_REG_PPE_IP_PROT_CHK 0xe08
+
+#define MTK_REG_PPE_TB_BASE 0xe20
+
+#define MTK_REG_PPE_BNDR 0xe28
+#define MTK_PPE_BNDR_RATE_MASK 0xffff
+
+#define MTK_REG_PPE_BIND_LMT_0 0xe2C
+
+#define MTK_REG_PPE_BIND_LMT_1 0xe30
+#define MTK_PPE_NTU_KA BIT(16)
+
+#define MTK_REG_PPE_KA 0xe34
+#define MTK_PPE_KA_T BIT(0)
+#define MTK_PPE_KA_TCP BIT(16)
+#define MTK_PPE_KA_UDP BIT(24)
+
+#define MTK_REG_PPE_UNB_AGE 0xe38
+#define MTK_PPE_UNB_AGE_MNP_MASK (0xffff << 16)
+#define MTK_PPE_UNB_AGE_MNP (1000 << 16)
+#define MTK_PPE_UNB_AGE_DLTA_MASK 0xff
+#define MTK_PPE_UNB_AGE_DLTA 3
+
+#define MTK_REG_PPE_BND_AGE0 0xe3c
+#define MTK_PPE_BND_AGE0_NTU_DLTA_MASK (0xffff << 16)
+#define MTK_PPE_BND_AGE0_NTU_DLTA (5 << 16)
+#define MTK_PPE_BND_AGE0_UDP_DLTA_MASK 0xffff
+#define MTK_PPE_BND_AGE0_UDP_DLTA 5
+
+#define MTK_REG_PPE_BND_AGE1 0xe40
+#define MTK_PPE_BND_AGE1_FIN_DLTA_MASK (0xffff << 16)
+#define MTK_PPE_BND_AGE1_FIN_DLTA (5 << 16)
+#define MTK_PPE_BND_AGE1_TCP_DLTA_MASK 0xffff
+#define MTK_PPE_BND_AGE1_TCP_DLTA 5
+
+#define MTK_REG_PPE_DFT_CPORT 0xe48
+
+#define MTK_REG_PPE_TB_CFG 0xe1c
+#define MTK_PPE_TB_CFG_X_MODE_MASK (3 << 18)
+#define MTK_PPE_TB_CFG_HASH_MODE1 BIT(14)
+#define MTK_PPE_TB_CFG_HASH_MODE_MASK (0x3 << 14)
+#define MTK_PPE_TB_CFG_KA (3 << 12)
+#define MTK_PPE_TB_CFG_KA_MASK (0x3 << 12)
+#define MTK_PPE_TB_CFG_FIN_AGE BIT(11)
+#define MTK_PPE_TB_CFG_UDP_AGE BIT(10)
+#define MTK_PPE_TB_CFG_TCP_AGE BIT(9)
+#define MTK_PPE_TB_CFG_UNBD_AGE BIT(8)
+#define MTK_PPE_TB_CFG_NTU_AGE BIT(7)
+#define MTK_PPE_TB_CFG_SMA_FWD_CPU (0x3 << 4)
+#define MTK_PPE_TB_CFG_SMA_MASK (0x3 << 4)
+#define MTK_PPE_TB_CFG_ENTRY_SZ_64B 0
+#define MTK_PPE_TB_CFG_ENTRY_SZ_MASK BIT(3)
+#define MTK_PPE_TB_CFG_TBL_SZ_4K 2
+#define MTK_PPE_TB_CFG_TBL_SZ_MASK 0x7
+
+#define MTK_REG_PPE_HASH_SEED 0xe44
+#define MTK_PPE_HASH_SEED 0x12345678
+
+
+#define MTK_REG_PPE_CAH_CTRL 0xf20
+#define MTK_PPE_CAH_CTRL_X_MODE BIT(9)
+#define MTK_PPE_CAH_CTRL_EN BIT(0)
+
+struct mtk_foe_unbind_info_blk {
+ u32 time_stamp:8;
+ u32 pcnt:16; /* packet count */
+ u32 preb:1;
+ u32 pkt_type:3;
+ u32 state:2;
+ u32 udp:1;
+ u32 sta:1; /* static entry */
+} __attribute__ ((packed));
+
+struct mtk_foe_bind_info_blk {
+ u32 time_stamp:15;
+ u32 ka:1; /* keep alive */
+ u32 vlan_layer:3;
+ u32 psn:1; /* egress packet has PPPoE session */
+#ifdef CONFIG_RALINK
+ u32 vpm:2; /* 0:ethertype remark, 1:0x8100(CR default) */
+#else
+ u32 vpm:1; /* 0:ethertype remark, 1:0x8100(CR default) */
+ u32 ps:1; /* packet sampling */
+#endif
+ u32 cah:1; /* cacheable flag */
+ u32 rmt:1; /* remove tunnel ip header (6rd/dslite only) */
+ u32 ttl:1;
+ u32 pkt_type:3;
+ u32 state:2;
+ u32 udp:1;
+ u32 sta:1; /* static entry */
+} __attribute__ ((packed));
+
+struct mtk_foe_info_blk2 {
+ u32 qid:4; /* QID in Qos Port */
+ u32 fqos:1; /* force to PSE QoS port */
+ u32 dp:3; /* force to PSE port x
+ 0:PSE,1:GSW, 2:GMAC,4:PPE,5:QDMA,7=DROP */
+ u32 mcast:1; /* multicast this packet to CPU */
+ u32 pcpl:1; /* OSBN */
+ u32 mlen:1; /* 0:post 1:pre packet length in meter */
+ u32 alen:1; /* 0:post 1:pre packet length in accounting */
+ u32 port_mg:6; /* port meter group */
+ u32 port_ag:6; /* port account group */
+ u32 dscp:8; /* DSCP value */
+} __attribute__ ((packed));
+
+struct mtk_foe_ipv4_hnapt {
+ union {
+ struct mtk_foe_bind_info_blk bfib1;
+ struct mtk_foe_unbind_info_blk udib1;
+ u32 info_blk1;
+ };
+ u32 sip;
+ u32 dip;
+ u16 dport;
+ u16 sport;
+ union {
+ struct mtk_foe_info_blk2 iblk2;
+ u32 info_blk2;
+ };
+ u32 new_sip;
+ u32 new_dip;
+ u16 new_dport;
+ u16 new_sport;
+ u32 resv1;
+ u32 resv2;
+ u32 resv3:26;
+ u32 act_dp:6; /* UDF */
+ u16 vlan1;
+ u16 etype;
+ u32 dmac_hi;
+ u16 vlan2;
+ u16 dmac_lo;
+ u32 smac_hi;
+ u16 pppoe_id;
+ u16 smac_lo;
+} __attribute__ ((packed));
+
+struct mtk_foe_entry {
+ union {
+ struct mtk_foe_unbind_info_blk udib1;
+ struct mtk_foe_bind_info_blk bfib1;
+ struct mtk_foe_ipv4_hnapt ipv4_hnapt;
+ };
+};
+
+enum mtk_foe_entry_state {
+ FOE_STATE_INVALID = 0,
+ FOE_STATE_UNBIND = 1,
+ FOE_STATE_BIND = 2,
+ FOE_STATE_FIN = 3
+};
+
+
+#define MTK_RXD4_FOE_ENTRY GENMASK(13, 0)
+#define MTK_RXD4_CPU_REASON GENMASK(18, 14)
+#define MTK_RXD4_SRC_PORT GENMASK(21, 19)
+#define MTK_RXD4_ALG GENMASK(31, 22)
+
+enum mtk_foe_cpu_reason {
+ MTK_CPU_REASON_TTL_EXCEEDED = 0x02,
+ MTK_CPU_REASON_OPTION_HEADER = 0x03,
+ MTK_CPU_REASON_NO_FLOW = 0x07,
+ MTK_CPU_REASON_IPV4_FRAG = 0x08,
+ MTK_CPU_REASON_IPV4_DSLITE_FRAG = 0x09,
+ MTK_CPU_REASON_IPV4_DSLITE_NO_TCP_UDP = 0x0a,
+ MTK_CPU_REASON_IPV6_6RD_NO_TCP_UDP = 0x0b,
+ MTK_CPU_REASON_TCP_FIN_SYN_RST = 0x0c,
+ MTK_CPU_REASON_UN_HIT = 0x0d,
+ MTK_CPU_REASON_HIT_UNBIND = 0x0e,
+ MTK_CPU_REASON_HIT_UNBIND_RATE_REACHED = 0x0f,
+ MTK_CPU_REASON_HIT_BIND_TCP_FIN = 0x10,
+ MTK_CPU_REASON_HIT_TTL_1 = 0x11,
+ MTK_CPU_REASON_HIT_BIND_VLAN_VIOLATION = 0x12,
+ MTK_CPU_REASON_KEEPALIVE_UC_OLD_HDR = 0x13,
+ MTK_CPU_REASON_KEEPALIVE_MC_NEW_HDR = 0x14,
+ MTK_CPU_REASON_KEEPALIVE_DUP_OLD_HDR = 0x15,
+ MTK_CPU_REASON_HIT_BIND_FORCE_CPU = 0x16,
+ MTK_CPU_REASON_TUNNEL_OPTION_HEADER = 0x17,
+ MTK_CPU_REASON_MULTICAST_TO_CPU = 0x18,
+ MTK_CPU_REASON_MULTICAST_TO_GMAC1_CPU = 0x19,
+ MTK_CPU_REASON_HIT_PRE_BIND = 0x1a,
+ MTK_CPU_REASON_PACKET_SAMPLING = 0x1b,
+ MTK_CPU_REASON_EXCEED_MTU = 0x1c,
+ MTK_CPU_REASON_PPE_BYPASS = 0x1e,
+ MTK_CPU_REASON_INVALID = 0x1f,
+};
+
+
+/* our table size is 4K */
+#define MTK_PPE_ENTRY_CNT 0x1000
+#define MTK_PPE_TBL_SZ \
+ (MTK_PPE_ENTRY_CNT * sizeof(struct mtk_foe_entry))
+
+int mtk_ppe_debugfs_init(struct mtk_eth *eth);
+
+
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