+++ /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 int
-mtk_check_entry_available(struct mtk_eth *eth, u32 hash)
-{
- struct mtk_foe_entry entry = ((struct mtk_foe_entry *)eth->foe_table)[hash];
-
- return (entry.bfib1.state == BIND)? 0:1;
-}
-
-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;
-
- if (type == FLOW_OFFLOAD_DEL) {
- flow = NULL;
- synchronize_rcu();
- return 0;
- }
-
- 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;
- }
-
- /* Two-way hash: when hash collision occurs, the hash value will be shifted to the next position. */
- if (!mtk_check_entry_available(eth, ohash)){
- if (!mtk_check_entry_available(eth, ohash + 1))
- return -EINVAL;
- ohash += 1;
- }
- if (!mtk_check_entry_available(eth, rhash)){
- if (!mtk_check_entry_available(eth, rhash + 1))
- return -EINVAL;
- rhash += 1;
- }
-
- mtk_foe_set_mac(&orig, dest->eth_src, dest->eth_dest);
- mtk_foe_set_mac(&reply, src->eth_src, src->eth_dest);
- 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);
-
- 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
-
- /* allow packets with TTL=0 */
- mtk_m32(eth, MTK_PPE_GLO_CFG_TTL0_DROP, 0, 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);
-}
projects / openwrt / staging / mkresin.git / blobdiff