From: Birger Koblitz Date: Fri, 10 Sep 2021 13:06:24 +0000 (+0200) Subject: realtek: Add SoC-specific routing offload implementation X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1f402512ae0474ffd03c34bcfa54b2882d927861;p=openwrt%2Fstaging%2Fjow.git realtek: Add SoC-specific routing offload implementation Adds SoC specific routing offload implementations for RTL8380/90 and RTL9300. RTL83xx supports merely nexthop routing, RTL9300 full host and prefix routes. Signed-off-by: Birger Koblitz --- diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.c index 15a486d724..7470fff5eb 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl838x.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0-only #include +#include + #include "rtl83xx.h" extern struct mutex smi_lock; @@ -290,9 +292,10 @@ static void rtl838x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) e->suspended = !!(r[1] & BIT(29)); e->next_hop = !!(r[1] & BIT(28)); if (e->next_hop) { - pr_info("Found next hop entry, need to read extra data\n"); + pr_debug("Found next hop entry, need to read extra data\n"); e->nh_vlan_target = !!(r[0] & BIT(9)); e->nh_route_id = r[0] & 0x1ff; + e->vid = e->rvid; } e->age = (r[0] >> 17) & 0x3; e->valid = true; @@ -304,7 +307,7 @@ static void rtl838x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) else e->type = L2_UNICAST; } else { // L2 multicast - pr_info("Got L2 MC entry: %08x %08x %08x\n", r[0], r[1], r[2]); + pr_debug("Got L2 MC entry: %08x %08x %08x\n", r[0], r[1], r[2]); e->valid = true; e->type = L2_MULTICAST; e->mc_portmask_index = (r[0] >> 12) & 0x1ff; @@ -312,9 +315,8 @@ static void rtl838x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) } else { // IPv4 and IPv6 multicast e->valid = true; e->mc_portmask_index = (r[0] >> 12) & 0x1ff; - e->mc_gip = r[1]; - e->mc_sip = r[2]; - e->rvid = r[0] & 0xfff; + e->mc_gip = (r[1] << 20) | (r[2] >> 12); + e->rvid = r[2] & 0xfff; } if (e->is_ip_mc) e->type = IP4_MULTICAST; @@ -353,19 +355,20 @@ static void rtl838x_fill_l2_row(u32 r[], struct rtl838x_l2_entry *e) if (e->next_hop) { r[1] |= BIT(28); r[0] |= e->nh_vlan_target ? BIT(9) : 0; - r[0] |= e->nh_route_id &0x1ff; + r[0] |= e->nh_route_id & 0x1ff; } r[0] |= (e->age & 0x3) << 17; } else { // L2 Multicast r[0] |= (e->mc_portmask_index & 0x1ff) << 12; r[2] |= e->rvid & 0xfff; r[0] |= e->vid & 0xfff; - pr_info("FILL MC: %08x %08x %08x\n", r[0], r[1], r[2]); + pr_debug("FILL MC: %08x %08x %08x\n", r[0], r[1], r[2]); } } else { // IPv4 and IPv6 multicast - r[1] = e->mc_gip; - r[2] = e->mc_sip; - r[0] |= e->rvid; + r[0] |= (e->mc_portmask_index & 0x1ff) << 12; + r[1] = e->mc_gip >> 20; + r[2] = e->mc_gip << 12; + r[2] |= e->rvid; } } @@ -392,7 +395,7 @@ static u64 rtl838x_read_l2_entry_using_hash(u32 hash, u32 pos, struct rtl838x_l2 if (!e->valid) return 0; - entry = (((u64) r[1]) << 32) | (r[2] & 0xfffff000) | (r[0] & 0xfff); + entry = (((u64) r[1]) << 32) | (r[2]); // mac and vid concatenated as hash seed return entry; } @@ -433,7 +436,7 @@ static u64 rtl838x_read_cam(int idx, struct rtl838x_l2_entry *e) pr_debug("Found in CAM: R1 %x R2 %x R3 %x\n", r[0], r[1], r[2]); // Return MAC with concatenated VID ac concatenated ID - entry = (((u64) r[1]) << 32) | (r[2] & 0xfffff000) | (r[0] & 0xfff); + entry = (((u64) r[1]) << 32) | r[2]; return entry; } @@ -509,16 +512,6 @@ static void rtl838x_l2_learning_setup(void) sw_w32(0, RTL838X_SPCL_TRAP_ARP_CTRL); } -static inline int rtl838x_vlan_port_egr_filter(int port) -{ - return RTL838X_VLAN_PORT_EGR_FLTR; -} - -static inline int rtl838x_vlan_port_igr_filter(int port) -{ - return RTL838X_VLAN_PORT_IGR_FLTR(port); -} - static void rtl838x_stp_get(struct rtl838x_switch_priv *priv, u16 msti, u32 port_state[]) { int i; @@ -1553,6 +1546,41 @@ static void rtl838x_packet_cntr_clear(int counter) rtl_table_release(r); } +static void rtl838x_route_read(int idx, struct rtl83xx_route *rt) +{ + // Read ROUTING table (2) via register RTL8380_TBL_1 + struct table_reg *r = rtl_table_get(RTL8380_TBL_1, 2); + + pr_debug("In %s, id %d\n", __func__, idx); + rtl_table_read(r, idx); + + // The table has a size of 2 registers + rt->nh.gw = sw_r32(rtl_table_data(r, 0)); + rt->nh.gw <<= 32; + rt->nh.gw |= sw_r32(rtl_table_data(r, 1)); + + rtl_table_release(r); +} + +static void rtl838x_route_write(int idx, struct rtl83xx_route *rt) +{ + // Access ROUTING table (2) via register RTL8380_TBL_1 + struct table_reg *r = rtl_table_get(RTL8380_TBL_1, 2); + + pr_debug("In %s, id %d, gw: %016llx\n", __func__, idx, rt->nh.gw); + sw_w32(rt->nh.gw >> 32, rtl_table_data(r, 0)); + sw_w32(rt->nh.gw, rtl_table_data(r, 1)); + rtl_table_write(r, idx); + + rtl_table_release(r); +} + +static int rtl838x_l3_setup(struct rtl838x_switch_priv *priv) +{ + // Nothing to be done + return 0; +} + const struct rtl838x_reg rtl838x_reg = { .mask_port_reg_be = rtl838x_mask_port_reg, .set_port_reg_be = rtl838x_set_port_reg, @@ -1605,7 +1633,7 @@ const struct rtl838x_reg rtl838x_reg = { .read_cam = rtl838x_read_cam, .write_cam = rtl838x_write_cam, .vlan_port_egr_filter = RTL838X_VLAN_PORT_EGR_FLTR, - .vlan_port_igr_filter = RTL838X_VLAN_PORT_IGR_FLTR(0), + .vlan_port_igr_filter = RTL838X_VLAN_PORT_IGR_FLTR, .vlan_port_pb = RTL838X_VLAN_PORT_PB_VLAN, .vlan_port_tag_sts_ctrl = RTL838X_VLAN_PORT_TAG_STS_CTRL, .trk_mbr_ctr = rtl838x_trk_mbr_ctr, @@ -1626,6 +1654,9 @@ const struct rtl838x_reg rtl838x_reg = { .l2_learning_setup = rtl838x_l2_learning_setup, .packet_cntr_read = rtl838x_packet_cntr_read, .packet_cntr_clear = rtl838x_packet_cntr_clear, + .route_read = rtl838x_route_read, + .route_write = rtl838x_route_write, + .l3_setup = rtl838x_l3_setup, }; irqreturn_t rtl838x_switch_irq(int irq, void *dev_id) diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c index 4ed2184efa..cca8824ce5 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c @@ -300,7 +300,7 @@ static void rtl839x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) e->is_ip_mc = !!(r[2] & BIT(31)); e->is_ipv6_mc = !!(r[2] & BIT(30)); e->type = L2_INVALID; - if (!e->is_ip_mc) { + if (!e->is_ip_mc && !e->is_ipv6_mc) { e->mac[0] = (r[0] >> 12); e->mac[1] = (r[0] >> 4); e->mac[2] = ((r[1] >> 28) | (r[0] << 4)); @@ -308,18 +308,23 @@ static void rtl839x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) e->mac[4] = (r[1] >> 12); e->mac[5] = (r[1] >> 4); + e->vid = (r[2] >> 4) & 0xfff; + e->rvid = (r[0] >> 20) & 0xfff; + /* Is it a unicast entry? check multicast bit */ if (!(e->mac[0] & 1)) { e->is_static = !!((r[2] >> 18) & 1); - e->vid = (r[2] >> 4) & 0xfff; - e->rvid = (r[0] >> 20) & 0xfff; e->port = (r[2] >> 24) & 0x3f; e->block_da = !!(r[2] & (1 << 19)); e->block_sa = !!(r[2] & (1 << 20)); e->suspended = !!(r[2] & (1 << 17)); e->next_hop = !!(r[2] & (1 << 16)); - if (e->next_hop) - pr_info("Found next hop entry, need to read data\n"); + if (e->next_hop) { + pr_debug("Found next hop entry, need to read data\n"); + e->nh_vlan_target = !!(r[2] & BIT(15)); + e->nh_route_id = (r[2] >> 4) & 0x1ff; + e->vid = e->rvid; + } e->age = (r[2] >> 21) & 3; e->valid = true; if (!(r[2] & 0xc0fd0000)) /* Check for valid entry */ @@ -329,8 +334,13 @@ static void rtl839x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) } else { e->valid = true; e->type = L2_MULTICAST; - e->mc_portmask_index = (r[2]>>6) & 0xfff; + e->mc_portmask_index = (r[2] >> 6) & 0xfff; + e->vid = e->rvid; } + } else { // IPv4 and IPv6 multicast + e->vid = e->rvid = (r[0] << 20) & 0xfff; + e->mc_gip = r[1]; + e->mc_portmask_index = (r[2] >> 6) & 0xfff; } if (e->is_ip_mc) { e->valid = true; @@ -340,10 +350,11 @@ static void rtl839x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) e->valid = true; e->type = IP6_MULTICAST; } + // pr_info("%s: vid %d, rvid: %d\n", __func__, e->vid, e->rvid); } /* - * Fills the 3 SoC table registers r[] with the information of in the rtl838x_l2_entry + * Fills the 3 SoC table registers r[] with the information in the rtl838x_l2_entry */ static void rtl839x_fill_l2_row(u32 r[], struct rtl838x_l2_entry *e) { @@ -366,27 +377,28 @@ static void rtl839x_fill_l2_row(u32 r[], struct rtl838x_l2_entry *e) if (!(e->mac[0] & 1)) { // Not multicast r[2] |= e->is_static ? BIT(18) : 0; - r[2] |= e->vid << 4; r[0] |= ((u32)e->rvid) << 20; r[2] |= e->port << 24; r[2] |= e->block_da ? BIT(19) : 0; r[2] |= e->block_sa ? BIT(20) : 0; r[2] |= e->suspended ? BIT(17) : 0; + r[2] |= ((u32)e->age) << 21; if (e->next_hop) { r[2] |= BIT(16); r[2] |= e->nh_vlan_target ? BIT(15) : 0; r[2] |= (e->nh_route_id & 0x7ff) << 4; + } else { + r[2] |= e->vid << 4; } - r[2] |= ((u32)e->age) << 21; + pr_debug("Write L2 NH: %08x %08x %08x\n", r[0], r[1], r[2]); } else { // L2 Multicast r[0] |= ((u32)e->rvid) << 20; r[2] |= ((u32)e->mc_portmask_index) << 6; - pr_debug("Write L2 MC entry: %08x %08x %08x\n", r[0], r[1], r[2]); } } else { // IPv4 or IPv6 MC entry r[0] = ((u32)e->rvid) << 20; - r[2] |= ((u32)e->mc_portmask_index) << 6; r[1] = e->mc_gip; + r[2] |= ((u32)e->mc_portmask_index) << 6; } } @@ -512,16 +524,6 @@ static void rtl839x_vlan_profile_setup(int profile) rtl839x_write_mcast_pmask(UNKNOWN_MC_PMASK, 0x001fffffffffffff); } -static inline int rtl839x_vlan_port_egr_filter(int port) -{ - return RTL839X_VLAN_PORT_EGR_FLTR(port); -} - -static inline int rtl839x_vlan_port_igr_filter(int port) -{ - return RTL839X_VLAN_PORT_IGR_FLTR(port); -} - u64 rtl839x_traffic_get(int source) { return rtl839x_get_port_reg_be(rtl839x_port_iso_ctrl(source)); @@ -1621,6 +1623,69 @@ static void rtl839x_packet_cntr_clear(int counter) rtl_table_release(r); } +static void rtl839x_route_read(int idx, struct rtl83xx_route *rt) +{ + u64 v; + // Read ROUTING table (2) via register RTL8390_TBL_1 + struct table_reg *r = rtl_table_get(RTL8390_TBL_1, 2); + + pr_debug("In %s\n", __func__); + rtl_table_read(r, idx); + + // The table has a size of 2 registers + v = sw_r32(rtl_table_data(r, 0)); + v <<= 32; + v |= sw_r32(rtl_table_data(r, 1)); + rt->switch_mac_id = (v >> 12) & 0xf; + rt->nh.gw = v >> 16; + + rtl_table_release(r); +} + +static void rtl839x_route_write(int idx, struct rtl83xx_route *rt) +{ + u32 v; + + // Read ROUTING table (2) via register RTL8390_TBL_1 + struct table_reg *r = rtl_table_get(RTL8390_TBL_1, 2); + + pr_debug("In %s\n", __func__); + sw_w32(rt->nh.gw >> 16, rtl_table_data(r, 0)); + v = rt->nh.gw << 16; + v |= rt->switch_mac_id << 12; + sw_w32(v, rtl_table_data(r, 1)); + rtl_table_write(r, idx); + + rtl_table_release(r); +} + +/* + * Configure the switch's own MAC addresses used when routing packets + */ +static void rtl839x_setup_port_macs(struct rtl838x_switch_priv *priv) +{ + int i; + struct net_device *dev; + u64 mac; + + pr_debug("%s: got port %08x\n", __func__, (u32)priv->ports[priv->cpu_port].dp); + dev = priv->ports[priv->cpu_port].dp->slave; + mac = ether_addr_to_u64(dev->dev_addr); + + for (i = 0; i < 15; i++) { + mac++; // BUG: VRRP for testing + sw_w32(mac >> 32, RTL839X_ROUTING_SA_CTRL + i * 8); + sw_w32(mac, RTL839X_ROUTING_SA_CTRL + i * 8 + 4); + } +} + +int rtl839x_l3_setup(struct rtl838x_switch_priv *priv) +{ + rtl839x_setup_port_macs(priv); + + return 0; +} + const struct rtl838x_reg rtl839x_reg = { .mask_port_reg_be = rtl839x_mask_port_reg_be, .set_port_reg_be = rtl839x_set_port_reg_be, @@ -1672,8 +1737,8 @@ const struct rtl838x_reg rtl839x_reg = { .write_l2_entry_using_hash = rtl839x_write_l2_entry_using_hash, .read_cam = rtl839x_read_cam, .write_cam = rtl839x_write_cam, - .vlan_port_egr_filter = RTL839X_VLAN_PORT_EGR_FLTR(0), - .vlan_port_igr_filter = RTL839X_VLAN_PORT_IGR_FLTR(0), + .vlan_port_egr_filter = RTL839X_VLAN_PORT_EGR_FLTR, + .vlan_port_igr_filter = RTL839X_VLAN_PORT_IGR_FLTR, .vlan_port_pb = RTL839X_VLAN_PORT_PB_VLAN, .vlan_port_tag_sts_ctrl = RTL839X_VLAN_PORT_TAG_STS_CTRL, .trk_mbr_ctr = rtl839x_trk_mbr_ctr, @@ -1694,4 +1759,7 @@ const struct rtl838x_reg rtl839x_reg = { .l2_learning_setup = rtl839x_l2_learning_setup, .packet_cntr_read = rtl839x_packet_cntr_read, .packet_cntr_clear = rtl839x_packet_cntr_clear, + .route_read = rtl839x_route_read, + .route_write = rtl839x_route_write, + .l3_setup = rtl839x_l3_setup, }; diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl930x.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl930x.c index aa6306c1c6..92426be1f3 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl930x.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl930x.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0-only #include +#include + #include "rtl83xx.h" extern struct mutex smi_lock; @@ -412,7 +414,7 @@ static void rtl930x_fill_l2_entry(u32 r[], struct rtl838x_l2_entry *e) e->valid = true; // the UC_VID field in hardware is used for the VID or for the route id if (e->next_hop) { - e->nh_route_id = r[2] & 0xfff; + e->nh_route_id = r[2] & 0x7ff; e->vid = 0; } else { e->vid = r[2] & 0xfff; @@ -463,7 +465,7 @@ static void rtl930x_fill_l2_row(u32 r[], struct rtl838x_l2_entry *e) r[2] |= (e->age & 0x3) << 17; // the UC_VID field in hardware is used for the VID or for the route id if (e->next_hop) - r[2] |= e->nh_route_id & 0xfff; + r[2] |= e->nh_route_id & 0x7ff; else r[2] |= e->vid & 0xfff; } else { // L2_MULTICAST @@ -529,8 +531,8 @@ static void rtl930x_write_l2_entry_using_hash(u32 hash, u32 pos, struct rtl838x_ u32 idx = (0 << 14) | (hash << 2) | pos; // Access SRAM, with hash and at pos in bucket int i; - pr_info("%s: hash %d, pos %d\n", __func__, hash, pos); - pr_info("%s: index %d -> mac %02x:%02x:%02x:%02x:%02x:%02x\n", __func__, idx, + pr_debug("%s: hash %d, pos %d\n", __func__, hash, pos); + pr_debug("%s: index %d -> mac %02x:%02x:%02x:%02x:%02x:%02x\n", __func__, idx, e->mac[0], e->mac[1], e->mac[2], e->mac[3],e->mac[4],e->mac[5]); rtl930x_fill_l2_row(r, e); @@ -593,80 +595,6 @@ static void dump_l2_entry(struct rtl838x_l2_entry *e) e->stack_dev, e->nh_route_id, e->port); } -/* - * Add an L2 nexthop entry for the L3 routing system in the SoC - * Use VID and MAC in rtl838x_l2_entry to identify either a free slot in the L2 hash table - * or mark an existing entry as a nexthop by setting it's nexthop bit - * Called from the L3 layer - * The index in the L2 hash table is filled into nh->l2_id; - */ -static int rtl930x_l2_nexthop_add(struct rtl838x_switch_priv *priv, struct rtl838x_nexthop *nh) -{ - struct rtl838x_l2_entry e; - u64 seed = rtl930x_l2_hash_seed(nh->mac, nh->vid); - u32 key = rtl930x_l2_hash_key(priv, seed); - int i, idx = -1; - u64 entry; - - pr_info("%s searching for %08llx vid %d with key %d, seed: %016llx\n", - __func__, nh->mac, nh->vid, key, seed); - - e.type = L2_UNICAST; - e.rvid = nh->fid; // Verify its the forwarding ID!!! l2_entry.un.unicast.fid - u64_to_ether_addr(nh->mac, &e.mac[0]); - e.port = RTL930X_PORT_IGNORE; - - // Loop over all entries in the hash-bucket and over the second block on 93xx SoCs - for (i = 0; i < priv->l2_bucket_size; i++) { - entry = rtl930x_read_l2_entry_using_hash(key, i, &e); - pr_info("%s i: %d, entry %016llx, seed %016llx\n", __func__, i, entry, seed); - if (e.valid && e.next_hop) - continue; - if (!e.valid || ((entry & 0x0fffffffffffffffULL) == seed)) { - idx = i > 3 ? ((key >> 14) & 0xffff) | i >> 1 - : ((key << 2) | i) & 0xffff; - break; - } - } - - pr_info("%s: found idx %d and i %d\n", __func__, idx, i); - - if (idx < 0) { - pr_err("%s: No more L2 forwarding entries available\n", __func__); - return -1; - } - - // Found an existing or empty entry, make it a nexthop entry - pr_info("%s BEFORE -> key %d, pos: %d, index: %d\n", __func__, key, i, idx); - dump_l2_entry(&e); - nh->l2_id = idx; - - // Found an existing (e->valid is true) or empty entry, make it a nexthop entry - if (e.valid) { - nh->port = e.port; - nh->fid = e.rvid; - nh->vid = e.vid; - nh->dev_id = e.stack_dev; - } else { - e.valid = true; - e.is_static = false; - e.vid = nh->vid; - e.rvid = nh->fid; - e.port = RTL930X_PORT_IGNORE; - u64_to_ether_addr(nh->mac, &e.mac[0]); - } - e.next_hop = true; - // For nexthop entries, the vid field in the table is used to denote the dest mac_id - e.nh_route_id = nh->mac_id; - pr_info("%s AFTER\n", __func__); - dump_l2_entry(&e); - - rtl930x_write_l2_entry_using_hash(idx >> 2, idx & 0x3, &e); - - // _dal_longan_l2_nexthop_add - return 0; -} - static u64 rtl930x_read_mcast_pmask(int idx) { u32 portmask; @@ -767,9 +695,6 @@ irqreturn_t rtl930x_switch_irq(int irq, void *dev_id) /* Clear status */ sw_w32(ports, RTL930X_ISR_PORT_LINK_STS_CHG); - pr_info("RTL9300 Link change: status: %x, ports %x\n", status, ports); - - rtl9300_dump_debug(); for (i = 0; i < 28; i++) { if (ports & BIT(i)) { @@ -787,41 +712,6 @@ irqreturn_t rtl930x_switch_irq(int irq, void *dev_id) return IRQ_HANDLED; } -int rtl9300_sds_power(int mac, int val) -{ - int sds_num; - u32 mode; - - // TODO: these numbers are hard-coded for the Zyxel XGS1210 12 Switch - pr_info("SerDes: %s %d\n", __func__, mac); - switch (mac) { - case 24: - sds_num = 6; - mode = 0x12; // HISGMII - break; - case 25: - sds_num = 7; - mode = 0x12; // HISGMII - break; - case 26: - sds_num = 8; - mode = 0x1b; // 10GR/1000BX auto - break; - case 27: - sds_num = 9; - mode = 0x1b; // 10GR/1000BX auto - break; - default: - return -1; - } - if (!val) - mode = 0x1f; // OFF - - rtl9300_sds_rst(sds_num, mode); - - return 0; -} - int rtl930x_write_phy(u32 port, u32 page, u32 reg, u32 val) { u32 v; @@ -1077,6 +967,562 @@ static void rtl930x_init_eee(struct rtl838x_switch_priv *priv, bool enable) priv->eee_enabled = enable; } +#define HASH_PICK(val, lsb, len) ((val & (((1 << len) - 1) << lsb)) >> lsb) + +static u32 rtl930x_l3_hash4(u32 ip, int algorithm, bool move_dip) +{ + u32 rows[4]; + u32 hash; + u32 s0, s1, pH; + + memset(rows, 0, sizeof(rows)); + + rows[0] = HASH_PICK(ip, 27, 5); + rows[1] = HASH_PICK(ip, 18, 9); + rows[2] = HASH_PICK(ip, 9, 9); + + if (!move_dip) + rows[3] = HASH_PICK(ip, 0, 9); + + if (!algorithm) { + hash = rows[0] ^ rows[1] ^ rows[2] ^ rows[3]; + } else { + s0 = rows[0] + rows[1] + rows[2]; + s1 = (s0 & 0x1ff) + ((s0 & (0x1ff << 9)) >> 9); + pH = (s1 & 0x1ff) + ((s1 & (0x1ff << 9)) >> 9); + hash = pH ^ rows[3]; + } + return hash; +} + +static u32 rtl930x_l3_hash6(struct in6_addr *ip6, int algorithm, bool move_dip) +{ + u32 rows[16]; + u32 hash; + u32 s0, s1, pH; + + rows[0] = (HASH_PICK(ip6->s6_addr[0], 6, 2) << 0); + rows[1] = (HASH_PICK(ip6->s6_addr[0], 0, 6) << 3) | HASH_PICK(ip6->s6_addr[1], 5, 3); + rows[2] = (HASH_PICK(ip6->s6_addr[1], 0, 5) << 4) | HASH_PICK(ip6->s6_addr[2], 4, 4); + rows[3] = (HASH_PICK(ip6->s6_addr[2], 0, 4) << 5) | HASH_PICK(ip6->s6_addr[3], 3, 5); + rows[4] = (HASH_PICK(ip6->s6_addr[3], 0, 3) << 6) | HASH_PICK(ip6->s6_addr[4], 2, 6); + rows[5] = (HASH_PICK(ip6->s6_addr[4], 0, 2) << 7) | HASH_PICK(ip6->s6_addr[5], 1, 7); + rows[6] = (HASH_PICK(ip6->s6_addr[5], 0, 1) << 8) | HASH_PICK(ip6->s6_addr[6], 0, 8); + rows[7] = (HASH_PICK(ip6->s6_addr[7], 0, 8) << 1) | HASH_PICK(ip6->s6_addr[8], 7, 1); + rows[8] = (HASH_PICK(ip6->s6_addr[8], 0, 7) << 2) | HASH_PICK(ip6->s6_addr[9], 6, 2); + rows[9] = (HASH_PICK(ip6->s6_addr[9], 0, 6) << 3) | HASH_PICK(ip6->s6_addr[10], 5, 3); + rows[10] = (HASH_PICK(ip6->s6_addr[10], 0, 5) << 4) | HASH_PICK(ip6->s6_addr[11], 4, 4); + if (!algorithm) { + rows[11] = (HASH_PICK(ip6->s6_addr[11], 0, 4) << 5) + | (HASH_PICK(ip6->s6_addr[12], 3, 5) << 0); + rows[12] = (HASH_PICK(ip6->s6_addr[12], 0, 3) << 6) + | (HASH_PICK(ip6->s6_addr[13], 2, 6) << 0); + rows[13] = (HASH_PICK(ip6->s6_addr[13], 0, 2) << 7) + | (HASH_PICK(ip6->s6_addr[14], 1, 7) << 0); + if (!move_dip) { + rows[14] = (HASH_PICK(ip6->s6_addr[14], 0, 1) << 8) + | (HASH_PICK(ip6->s6_addr[15], 0, 8) << 0); + } + hash = rows[0] ^ rows[1] ^ rows[2] ^ rows[3] ^ rows[4] ^ rows[5] ^ rows[6] + ^ rows[7] ^ rows[8] ^ rows[9] ^ rows[10] ^ rows[11] ^ rows[12] + ^ rows[13] ^ rows[14]; + } else { + rows[11] = (HASH_PICK(ip6->s6_addr[11], 0, 4) << 5); + rows[12] = (HASH_PICK(ip6->s6_addr[12], 3, 5) << 0); + rows[13] = (HASH_PICK(ip6->s6_addr[12], 0, 3) << 6) + | HASH_PICK(ip6->s6_addr[13], 2, 6); + rows[14] = (HASH_PICK(ip6->s6_addr[13], 0, 2) << 7) + | HASH_PICK(ip6->s6_addr[14], 1, 7); + if (!move_dip) { + rows[15] = (HASH_PICK(ip6->s6_addr[14], 0, 1) << 8) + | (HASH_PICK(ip6->s6_addr[15], 0, 8) << 0); + } + s0 = rows[12] + rows[13] + rows[14]; + s1 = (s0 & 0x1ff) + ((s0 & (0x1ff << 9)) >> 9); + pH = (s1 & 0x1ff) + ((s1 & (0x1ff << 9)) >> 9); + hash = rows[0] ^ rows[1] ^ rows[2] ^ rows[3] ^ rows[4] ^ rows[5] ^ rows[6] + ^ rows[7] ^ rows[8] ^ rows[9] ^ rows[10] ^ rows[11] ^ pH ^ rows[15]; + } + return hash; +} + +/* + * Read a prefix route entry from the L3_PREFIX_ROUTE_IPUC table + * We currently only support IPv4 and IPv6 unicast route + */ +static void rtl930x_route_read(int idx, struct rtl83xx_route *rt) +{ + u32 v, ip4_m; + bool host_route, default_route; + struct in6_addr ip6_m; + + // Read L3_PREFIX_ROUTE_IPUC table (2) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 2); + + rtl_table_read(r, idx); + // The table has a size of 11 registers + rt->attr.valid = !!(sw_r32(rtl_table_data(r, 0)) & BIT(31)); + if (!rt->attr.valid) + goto out; + + rt->attr.type = (sw_r32(rtl_table_data(r, 0)) >> 29) & 0x3; + + v = sw_r32(rtl_table_data(r, 10)); + host_route = !!(v & BIT(21)); + default_route = !!(v & BIT(20)); + rt->prefix_len = -1; + pr_info("%s: host route %d, default_route %d\n", __func__, host_route, default_route); + + switch (rt->attr.type) { + case 0: // IPv4 Unicast route + rt->dst_ip = sw_r32(rtl_table_data(r, 4)); + ip4_m = sw_r32(rtl_table_data(r, 9)); + pr_info("%s: Read ip4 mask: %08x\n", __func__, ip4_m); + rt->prefix_len = host_route ? 32 : -1; + rt->prefix_len = (rt->prefix_len < 0 && default_route) ? 0 : -1; + if (rt->prefix_len < 0) + rt->prefix_len = inet_mask_len(ip4_m); + break; + case 2: // IPv6 Unicast route + ipv6_addr_set(&rt->dst_ip6, + sw_r32(rtl_table_data(r, 1)), sw_r32(rtl_table_data(r, 2)), + sw_r32(rtl_table_data(r, 3)), sw_r32(rtl_table_data(r, 4))); + ipv6_addr_set(&ip6_m, + sw_r32(rtl_table_data(r, 6)), sw_r32(rtl_table_data(r, 7)), + sw_r32(rtl_table_data(r, 8)), sw_r32(rtl_table_data(r, 9))); + rt->prefix_len = host_route ? 128 : 0; + rt->prefix_len = (rt->prefix_len < 0 && default_route) ? 0 : -1; + if (rt->prefix_len < 0) + rt->prefix_len = find_last_bit((unsigned long int *)&ip6_m.s6_addr32, + 128); + break; + case 1: // IPv4 Multicast route + case 3: // IPv6 Multicast route + pr_warn("%s: route type not supported\n", __func__); + goto out; + } + + rt->attr.hit = !!(v & BIT(22)); + rt->attr.action = (v >> 18) & 3; + rt->nh.id = (v >> 7) & 0x7ff; + rt->attr.ttl_dec = !!(v & BIT(6)); + rt->attr.ttl_check = !!(v & BIT(5)); + rt->attr.dst_null = !!(v & BIT(4)); + rt->attr.qos_as = !!(v & BIT(3)); + rt->attr.qos_prio = v & 0x7; + pr_info("%s: index %d is valid: %d\n", __func__, idx, rt->attr.valid); + pr_info("%s: next_hop: %d, hit: %d, action :%d, ttl_dec %d, ttl_check %d, dst_null %d\n", + __func__, rt->nh.id, rt->attr.hit, rt->attr.action, + rt->attr.ttl_dec, rt->attr.ttl_check, rt->attr.dst_null); + pr_info("%s: GW: %pI4, prefix_len: %d\n", __func__, &rt->dst_ip, rt->prefix_len); +out: + rtl_table_release(r); +} + +static void rtl930x_net6_mask(int prefix_len, struct in6_addr *ip6_m) +{ + int o, b; + // Define network mask + o = prefix_len >> 3; + b = prefix_len & 0x7; + memset(ip6_m->s6_addr, 0xff, o); + ip6_m->s6_addr[o] |= b ? 0xff00 >> b : 0x00; +} + +/* + * Read a host route entry from the table using its index + * We currently only support IPv4 and IPv6 unicast route + */ +static void rtl930x_host_route_read(int idx, struct rtl83xx_route *rt) +{ + u32 v; + // Read L3_HOST_ROUTE_IPUC table (1) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 1); + + idx = ((idx / 6) * 8) + (idx % 6); + + pr_debug("In %s, physical index %d\n", __func__, idx); + rtl_table_read(r, idx); + // The table has a size of 5 (for UC, 11 for MC) registers + v = sw_r32(rtl_table_data(r, 0)); + rt->attr.valid = !!(v & BIT(31)); + if (!rt->attr.valid) + goto out; + rt->attr.type = (v >> 29) & 0x3; + switch (rt->attr.type) { + case 0: // IPv4 Unicast route + rt->dst_ip = sw_r32(rtl_table_data(r, 4)); + break; + case 2: // IPv6 Unicast route + ipv6_addr_set(&rt->dst_ip6, + sw_r32(rtl_table_data(r, 3)), sw_r32(rtl_table_data(r, 2)), + sw_r32(rtl_table_data(r, 1)), sw_r32(rtl_table_data(r, 0))); + break; + case 1: // IPv4 Multicast route + case 3: // IPv6 Multicast route + pr_warn("%s: route type not supported\n", __func__); + goto out; + } + + rt->attr.hit = !!(v & BIT(20)); + rt->attr.dst_null = !!(v & BIT(19)); + rt->attr.action = (v >> 17) & 3; + rt->nh.id = (v >> 6) & 0x7ff; + rt->attr.ttl_dec = !!(v & BIT(5)); + rt->attr.ttl_check = !!(v & BIT(4)); + rt->attr.qos_as = !!(v & BIT(3)); + rt->attr.qos_prio = v & 0x7; + pr_debug("%s: index %d is valid: %d\n", __func__, idx, rt->attr.valid); + pr_debug("%s: next_hop: %d, hit: %d, action :%d, ttl_dec %d, ttl_check %d, dst_null %d\n", + __func__, rt->nh.id, rt->attr.hit, rt->attr.action, rt->attr.ttl_dec, rt->attr.ttl_check, + rt->attr.dst_null); + pr_debug("%s: Destination: %pI4\n", __func__, &rt->dst_ip); + +out: + rtl_table_release(r); +} + +/* + * Write a host route entry from the table using its index + * We currently only support IPv4 and IPv6 unicast route + */ +static void rtl930x_host_route_write(int idx, struct rtl83xx_route *rt) +{ + u32 v; + // Access L3_HOST_ROUTE_IPUC table (1) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 1); + // The table has a size of 5 (for UC, 11 for MC) registers + + idx = ((idx / 6) * 8) + (idx % 6); + + pr_debug("%s: index %d is valid: %d\n", __func__, idx, rt->attr.valid); + pr_debug("%s: next_hop: %d, hit: %d, action :%d, ttl_dec %d, ttl_check %d, dst_null %d\n", + __func__, rt->nh.id, rt->attr.hit, rt->attr.action, rt->attr.ttl_dec, rt->attr.ttl_check, + rt->attr.dst_null); + pr_debug("%s: GW: %pI4, prefix_len: %d\n", __func__, &rt->dst_ip, rt->prefix_len); + + v = BIT(31); // Entry is valid + v |= (rt->attr.type & 0x3) << 29; + v |= rt->attr.hit ? BIT(20) : 0; + v |= rt->attr.dst_null ? BIT(19) : 0; + v |= (rt->attr.action & 0x3) << 17; + v |= (rt->nh.id & 0x7ff) << 6; + v |= rt->attr.ttl_dec ? BIT(5) : 0; + v |= rt->attr.ttl_check ? BIT(4) : 0; + v |= rt->attr.qos_as ? BIT(3) : 0; + v |= rt->attr.qos_prio & 0x7; + + sw_w32(v, rtl_table_data(r, 0)); + switch (rt->attr.type) { + case 0: // IPv4 Unicast route + sw_w32(0, rtl_table_data(r, 1)); + sw_w32(0, rtl_table_data(r, 2)); + sw_w32(0, rtl_table_data(r, 3)); + sw_w32(rt->dst_ip, rtl_table_data(r, 4)); + break; + case 2: // IPv6 Unicast route + sw_w32(rt->dst_ip6.s6_addr32[0], rtl_table_data(r, 1)); + sw_w32(rt->dst_ip6.s6_addr32[1], rtl_table_data(r, 2)); + sw_w32(rt->dst_ip6.s6_addr32[2], rtl_table_data(r, 3)); + sw_w32(rt->dst_ip6.s6_addr32[3], rtl_table_data(r, 4)); + break; + case 1: // IPv4 Multicast route + case 3: // IPv6 Multicast route + pr_warn("%s: route type not supported\n", __func__); + goto out; + } + + rtl_table_write(r, idx); + +out: + rtl_table_release(r); +} + +/* + * Look up the index of a prefix route in the routing table CAM for unicast IPv4/6 routes + * using hardware offload. + */ +static int rtl930x_route_lookup_hw(struct rtl83xx_route *rt) +{ + u32 ip4_m, v; + struct in6_addr ip6_m; + int i; + + if (rt->attr.type == 1 || rt->attr.type == 3) // Hardware only supports UC routes + return -1; + + sw_w32_mask(0x3 << 19, rt->attr.type, RTL930X_L3_HW_LU_KEY_CTRL); + if (rt->attr.type) { // IPv6 + rtl930x_net6_mask(rt->prefix_len, &ip6_m); + for (i = 0; i < 4; i++) + sw_w32(rt->dst_ip6.s6_addr32[0] & ip6_m.s6_addr32[0], + RTL930X_L3_HW_LU_KEY_IP_CTRL + (i << 2)); + } else { // IPv4 + ip4_m = inet_make_mask(rt->prefix_len); + sw_w32(0, RTL930X_L3_HW_LU_KEY_IP_CTRL); + sw_w32(0, RTL930X_L3_HW_LU_KEY_IP_CTRL + 4); + sw_w32(0, RTL930X_L3_HW_LU_KEY_IP_CTRL + 8); + v = rt->dst_ip & ip4_m; + pr_info("%s: searching for %pI4\n", __func__, &v); + sw_w32(v, RTL930X_L3_HW_LU_KEY_IP_CTRL + 12); + } + + // Execute CAM lookup in SoC + sw_w32(BIT(15), RTL930X_L3_HW_LU_CTRL); + + // Wait until execute bit clears and result is ready + do { + v = sw_r32(RTL930X_L3_HW_LU_CTRL); + } while (v & BIT(15)); + + pr_info("%s: found: %d, index: %d\n", __func__, !!(v & BIT(14)), v & 0x1ff); + + // Test if search successful (BIT 14 set) + if (v & BIT(14)) + return v & 0x1ff; + + return -1; +} + +static int rtl930x_find_l3_slot(struct rtl83xx_route *rt, bool must_exist) +{ + int t, s, slot_width, algorithm, addr, idx; + u32 hash; + struct rtl83xx_route route_entry; + + // IPv6 entries take up 3 slots + slot_width = (rt->attr.type == 0) || (rt->attr.type == 2) ? 1 : 3; + + for (t = 0; t < 2; t++) { + algorithm = (sw_r32(RTL930X_L3_HOST_TBL_CTRL) >> (2 + t)) & 0x1; + hash = rtl930x_l3_hash4(rt->dst_ip, algorithm, false); + + pr_debug("%s: table %d, algorithm %d, hash %04x\n", __func__, t, algorithm, hash); + + for (s = 0; s < 6; s += slot_width) { + addr = (t << 12) | ((hash & 0x1ff) << 3) | s; + pr_debug("%s physical address %d\n", __func__, addr); + idx = ((addr / 8) * 6) + (addr % 8); + pr_debug("%s logical address %d\n", __func__, idx); + + rtl930x_host_route_read(idx, &route_entry); + pr_debug("%s route valid %d, route dest: %pI4, hit %d\n", __func__, + rt->attr.valid, &rt->dst_ip, rt->attr.hit); + if (!must_exist && rt->attr.valid) + return idx; + if (must_exist && route_entry.dst_ip == rt->dst_ip) + return idx; + } + } + + return -1; +} + +/* + * Write a prefix route into the routing table CAM at position idx + * Currently only IPv4 and IPv6 unicast routes are supported + */ +static void rtl930x_route_write(int idx, struct rtl83xx_route *rt) +{ + u32 v, ip4_m; + struct in6_addr ip6_m; + // Access L3_PREFIX_ROUTE_IPUC table (2) via register RTL9300_TBL_1 + // The table has a size of 11 registers (20 for MC) + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 2); + + pr_debug("%s: index %d is valid: %d\n", __func__, idx, rt->attr.valid); + pr_debug("%s: nexthop: %d, hit: %d, action :%d, ttl_dec %d, ttl_check %d, dst_null %d\n", + __func__, rt->nh.id, rt->attr.hit, rt->attr.action, + rt->attr.ttl_dec, rt->attr.ttl_check, rt->attr.dst_null); + pr_debug("%s: GW: %pI4, prefix_len: %d\n", __func__, &rt->dst_ip, rt->prefix_len); + + v = rt->attr.valid ? BIT(31) : 0; + v |= (rt->attr.type & 0x3) << 29; + sw_w32(v, rtl_table_data(r, 0)); + + v = rt->attr.hit ? BIT(22) : 0; + v |= (rt->attr.action & 0x3) << 18; + v |= (rt->nh.id & 0x7ff) << 7; + v |= rt->attr.ttl_dec ? BIT(6) : 0; + v |= rt->attr.ttl_check ? BIT(5) : 0; + v |= rt->attr.dst_null ? BIT(6) : 0; + v |= rt->attr.qos_as ? BIT(6) : 0; + v |= rt->attr.qos_prio & 0x7; + v |= rt->prefix_len == 0 ? BIT(20) : 0; // set default route bit + + // set bit mask for entry type always to 0x3 + sw_w32(0x3 << 29, rtl_table_data(r, 5)); + + switch (rt->attr.type) { + case 0: // IPv4 Unicast route + sw_w32(0, rtl_table_data(r, 1)); + sw_w32(0, rtl_table_data(r, 2)); + sw_w32(0, rtl_table_data(r, 3)); + sw_w32(rt->dst_ip, rtl_table_data(r, 4)); + + v |= rt->prefix_len == 32 ? BIT(21) : 0; // set host-route bit + ip4_m = inet_make_mask(rt->prefix_len); + sw_w32(0, rtl_table_data(r, 6)); + sw_w32(0, rtl_table_data(r, 7)); + sw_w32(0, rtl_table_data(r, 8)); + sw_w32(ip4_m, rtl_table_data(r, 9)); + break; + case 2: // IPv6 Unicast route + sw_w32(rt->dst_ip6.s6_addr32[0], rtl_table_data(r, 1)); + sw_w32(rt->dst_ip6.s6_addr32[1], rtl_table_data(r, 2)); + sw_w32(rt->dst_ip6.s6_addr32[2], rtl_table_data(r, 3)); + sw_w32(rt->dst_ip6.s6_addr32[3], rtl_table_data(r, 4)); + + v |= rt->prefix_len == 128 ? BIT(21) : 0; // set host-route bit + + rtl930x_net6_mask(rt->prefix_len, &ip6_m); + + sw_w32(ip6_m.s6_addr32[0], rtl_table_data(r, 6)); + sw_w32(ip6_m.s6_addr32[1], rtl_table_data(r, 7)); + sw_w32(ip6_m.s6_addr32[2], rtl_table_data(r, 8)); + sw_w32(ip6_m.s6_addr32[3], rtl_table_data(r, 9)); + break; + case 1: // IPv4 Multicast route + case 3: // IPv6 Multicast route + pr_warn("%s: route type not supported\n", __func__); + rtl_table_release(r); + return; + } + sw_w32(v, rtl_table_data(r, 10)); + + pr_debug("%s: %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", __func__, + sw_r32(rtl_table_data(r, 0)), sw_r32(rtl_table_data(r, 1)), sw_r32(rtl_table_data(r, 2)), + sw_r32(rtl_table_data(r, 3)), sw_r32(rtl_table_data(r, 4)), sw_r32(rtl_table_data(r, 5)), + sw_r32(rtl_table_data(r, 6)), sw_r32(rtl_table_data(r, 7)), sw_r32(rtl_table_data(r, 8)), + sw_r32(rtl_table_data(r, 9)), sw_r32(rtl_table_data(r, 10))); + + rtl_table_write(r, idx); + rtl_table_release(r); +} + + +/* + * Get the destination MAC and L3 egress interface ID of a nexthop entry from + * the SoC's L3_NEXTHOP table + */ +static void rtl930x_get_l3_nexthop(int idx, u16 *dmac_id, u16 *interface) +{ + u32 v; + // Read L3_NEXTHOP table (3) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 3); + + rtl_table_read(r, idx); + // The table has a size of 1 register + v = sw_r32(rtl_table_data(r, 0)); + rtl_table_release(r); + + *dmac_id = (v >> 7) & 0x7fff; + *interface = v & 0x7f; +} + +static int rtl930x_l3_mtu_del(struct rtl838x_switch_priv *priv, int mtu) +{ + int i; + + for (i = 0; i < MAX_INTF_MTUS; i++) { + if (mtu == priv->intf_mtus[i]) + break; + } + if (i >= MAX_INTF_MTUS || !priv->intf_mtu_count[i]) { + pr_err("%s: No MTU slot found for MTU: %d\n", __func__, mtu); + return -EINVAL; + } + + priv->intf_mtu_count[i]--; +} + +static int rtl930x_l3_mtu_add(struct rtl838x_switch_priv *priv, int mtu) +{ + int i, free_mtu; + int mtu_id; + + // Try to find an existing mtu-value or a free slot + free_mtu = MAX_INTF_MTUS; + for (i = 0; i < MAX_INTF_MTUS && priv->intf_mtus[i] != mtu; i++) { + if ((!priv->intf_mtu_count[i]) && (free_mtu == MAX_INTF_MTUS)) + free_mtu = i; + } + i = (i < MAX_INTF_MTUS) ? i : free_mtu; + if (i < MAX_INTF_MTUS) { + mtu_id = i; + } else { + pr_err("%s: No free MTU slot available!\n", __func__); + return -EINVAL; + } + + priv->intf_mtus[i] = mtu; + pr_info("Writing MTU %d to slot %d\n", priv->intf_mtus[i], i); + // Set MTU-value of the slot TODO: distinguish between IPv4/IPv6 routes / slots + sw_w32_mask(0xffff << ((i % 2) * 16), priv->intf_mtus[i] << ((i % 2) * 16), + RTL930X_L3_IP_MTU_CTRL(i)); + sw_w32_mask(0xffff << ((i % 2) * 16), priv->intf_mtus[i] << ((i % 2) * 16), + RTL930X_L3_IP6_MTU_CTRL(i)); + + priv->intf_mtu_count[i]++; + + return mtu_id; +} + +/* + * Creates an interface for a route by setting up the HW tables in the SoC + */ +static int rtl930x_l3_intf_add(struct rtl838x_switch_priv *priv, struct rtl838x_l3_intf *intf) +{ + int i, intf_id, mtu_id; + // number of MTU-values < 16384 + + // Use the same IPv6 mtu as the ip4 mtu for this route if unset + intf->ip6_mtu = intf->ip6_mtu ? intf->ip6_mtu : intf->ip4_mtu; + + mtu_id = rtl930x_l3_mtu_add(priv, intf->ip4_mtu); + pr_info("%s: added mtu %d with mtu-id %d\n", __func__, intf->ip4_mtu, mtu_id); + if (mtu_id < 0) + return -ENOSPC; + intf->ip4_mtu_id = mtu_id; + intf->ip6_mtu_id = mtu_id; + + for (i = 0; i < MAX_INTERFACES; i++) { + if (!priv->interfaces[i]) + break; + } + if (i >= MAX_INTERFACES) { + pr_err("%s: cannot find free interface entry\n", __func__); + return -EINVAL; + } + intf_id = i; + priv->interfaces[i] = kzalloc(sizeof(struct rtl838x_l3_intf), GFP_KERNEL); + if (!priv->interfaces[i]) { + pr_err("%s: no memory to allocate new interface\n", __func__); + return -ENOMEM; + } +} + +/* + * Set the destination MAC and L3 egress interface ID for a nexthop entry in the SoC's + * L3_NEXTHOP table. The nexthop entry is identified by idx. + * dmac_id is the reference to the L2 entry in the L2 forwarding table, special values are + * 0x7ffe: TRAP2CPU + * 0x7ffd: TRAP2MASTERCPU + * 0x7fff: DMAC_ID_DROP + */ +static void rtl930x_set_l3_nexthop(int idx, u16 dmac_id, u16 interface) +{ + // Access L3_NEXTHOP table (3) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 3); + + pr_info("%s: Writing to L3_NEXTHOP table, index %d, dmac_id %d, interface %d\n", + __func__, idx, dmac_id, interface); + sw_w32(((dmac_id & 0x7fff) << 7) | (interface & 0x7f), rtl_table_data(r, 0)); + + pr_info("%s: %08x\n", __func__, sw_r32(rtl_table_data(r,0))); + rtl_table_write(r, idx); + rtl_table_release(r); +} static void rtl930x_pie_lookup_enable(struct rtl838x_switch_priv *priv, int index) { @@ -1618,6 +2064,219 @@ static void rtl930x_pie_init(struct rtl838x_switch_priv *priv) } +/* + * Sets up an egress interface for L3 actions + * Actions for ip4/6_icmp_redirect, ip4/6_pbr_icmp_redirect are: + * 0: FORWARD, 1: DROP, 2: TRAP2CPU, 3: COPY2CPU, 4: TRAP2MASTERCPU 5: COPY2MASTERCPU + * 6: HARDDROP + * idx is the index in the HW interface table: idx < 0x80 + */ +static void rtl930x_set_l3_egress_intf(int idx, struct rtl838x_l3_intf *intf) +{ + u32 u, v; + // Read L3_EGR_INTF table (4) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 4); + + // The table has 2 registers + u = (intf->vid & 0xfff) << 9; + u |= (intf->smac_idx & 0x3f) << 3; + u |= (intf->ip4_mtu_id & 0x7); + + v = (intf->ip6_mtu_id & 0x7) << 28; + v |= (intf->ttl_scope & 0xff) << 20; + v |= (intf->hl_scope & 0xff) << 12; + v |= (intf->ip4_icmp_redirect & 0x7) << 9; + v |= (intf->ip6_icmp_redirect & 0x7)<< 6; + v |= (intf->ip4_pbr_icmp_redirect & 0x7) << 3; + v |= (intf->ip6_pbr_icmp_redirect & 0x7); + + sw_w32(u, rtl_table_data(r, 0)); + sw_w32(v, rtl_table_data(r, 1)); + + pr_info("%s writing to index %d: %08x %08x\n", __func__, idx, u, v); + rtl_table_write(r, idx & 0x7f); + rtl_table_release(r); +} + +/* + * Reads a MAC entry for L3 termination as entry point for routing + * from the hardware table + * idx is the index into the L3_ROUTER_MAC table + */ +static void rtl930x_get_l3_router_mac(u32 idx, struct rtl93xx_rt_mac *m) +{ + u32 v, w; + // Read L3_ROUTER_MAC table (0) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 0); + + rtl_table_read(r, idx); + // The table has a size of 7 registers, 64 entries + v = sw_r32(rtl_table_data(r, 0)); + w = sw_r32(rtl_table_data(r, 3)); + m->valid = !!(v & BIT(20)); + if (!m->valid) + goto out; + + m->p_type = !!(v & BIT(19)); + m->p_id = (v >> 13) & 0x3f; // trunk id of port + m->vid = v & 0xfff; + m->vid_mask = w & 0xfff; + m->action = sw_r32(rtl_table_data(r, 6)) & 0x7; + m->mac_mask = ((((u64)sw_r32(rtl_table_data(r, 5))) << 32) & 0xffffffffffffULL) + | (sw_r32(rtl_table_data(r, 4))); + m->mac = ((((u64)sw_r32(rtl_table_data(r, 1))) << 32) & 0xffffffffffffULL) + | (sw_r32(rtl_table_data(r, 2))); + // Bits L3_INTF and BMSK_L3_INTF are 0 + +out: + rtl_table_release(r); +} + +/* + * Writes a MAC entry for L3 termination as entry point for routing + * into the hardware table + * idx is the index into the L3_ROUTER_MAC table + */ +static void rtl930x_set_l3_router_mac(u32 idx, struct rtl93xx_rt_mac *m) +{ + u32 v, w; + // Read L3_ROUTER_MAC table (0) via register RTL9300_TBL_1 + struct table_reg *r = rtl_table_get(RTL9300_TBL_1, 0); + + // The table has a size of 7 registers, 64 entries + v = BIT(20); // mac entry valid, port type is 0: individual + v |= (m->p_id & 0x3f) << 13; + v |= (m->vid & 0xfff); // Set the interface_id to the vlan id + + w = m->vid_mask; + w |= (m->p_id_mask & 0x3f) << 13; + + sw_w32(v, rtl_table_data(r, 0)); + sw_w32(w, rtl_table_data(r, 3)); + + // Set MAC address, L3_INTF (bit 12 in register 1) needs to be 0 + sw_w32((u32)(m->mac), rtl_table_data(r, 2)); + sw_w32(m->mac >> 32, rtl_table_data(r, 1)); + + // Set MAC address mask, BMSK_L3_INTF (bit 12 in register 5) needs to be 0 + sw_w32((u32)(m->mac_mask >> 32), rtl_table_data(r, 4)); + sw_w32((u32)m->mac_mask, rtl_table_data(r, 5)); + + sw_w32(m->action & 0x7, rtl_table_data(r, 6)); + + pr_debug("%s writing index %d: %08x %08x %08x %08x %08x %08x %08x\n", __func__, idx, + sw_r32(rtl_table_data(r, 0)), sw_r32(rtl_table_data(r, 1)), sw_r32(rtl_table_data(r, 2)), + sw_r32(rtl_table_data(r, 3)), sw_r32(rtl_table_data(r, 4)), sw_r32(rtl_table_data(r, 5)), + sw_r32(rtl_table_data(r, 6)) + ); + rtl_table_write(r, idx); + rtl_table_release(r); +} + +/* + * Get the Destination-MAC of an L3 egress interface or the Source MAC for routed packets + * from the SoC's L3_EGR_INTF_MAC table + * Indexes 0-2047 are DMACs, 2048+ are SMACs + */ +static u64 rtl930x_get_l3_egress_mac(u32 idx) +{ + u64 mac; + // Read L3_EGR_INTF_MAC table (2) via register RTL9300_TBL_2 + struct table_reg *r = rtl_table_get(RTL9300_TBL_2, 2); + + rtl_table_read(r, idx); + // The table has a size of 2 registers + mac = sw_r32(rtl_table_data(r, 0)); + mac <<= 32; + mac |= sw_r32(rtl_table_data(r, 1)); + rtl_table_release(r); + + return mac; +} +/* + * Set the Destination-MAC of a route or the Source MAC of an L3 egress interface + * in the SoC's L3_EGR_INTF_MAC table + * Indexes 0-2047 are DMACs, 2048+ are SMACs + */ +static void rtl930x_set_l3_egress_mac(u32 idx, u64 mac) +{ + // Access L3_EGR_INTF_MAC table (2) via register RTL9300_TBL_2 + struct table_reg *r = rtl_table_get(RTL9300_TBL_2, 2); + + // The table has a size of 2 registers + sw_w32(mac >> 32, rtl_table_data(r, 0)); + sw_w32(mac, rtl_table_data(r, 1)); + + pr_debug("%s: setting index %d to %016llx\n", __func__, idx, mac); + rtl_table_write(r, idx); + rtl_table_release(r); +} + +/* + * Configure L3 routing settings of the device: + * - MTUs + * - Egress interface + * - The router's MAC address on which routed packets are expected + * - MAC addresses used as source macs of routed packets + */ +int rtl930x_l3_setup(struct rtl838x_switch_priv *priv) +{ + int i; + + // Setup MTU with id 0 for default interface + for (i = 0; i < MAX_INTF_MTUS; i++) + priv->intf_mtu_count[i] = priv->intf_mtus[i] = 0; + + priv->intf_mtu_count[0] = 0; // Needs to stay forever + priv->intf_mtus[0] = DEFAULT_MTU; + sw_w32_mask(0xffff, DEFAULT_MTU, RTL930X_L3_IP_MTU_CTRL(0)); + sw_w32_mask(0xffff, DEFAULT_MTU, RTL930X_L3_IP6_MTU_CTRL(0)); + priv->intf_mtus[1] = DEFAULT_MTU; + sw_w32_mask(0xffff0000, DEFAULT_MTU << 16, RTL930X_L3_IP_MTU_CTRL(0)); + sw_w32_mask(0xffff0000, DEFAULT_MTU << 16, RTL930X_L3_IP6_MTU_CTRL(0)); + + sw_w32_mask(0xffff, DEFAULT_MTU, RTL930X_L3_IP_MTU_CTRL(1)); + sw_w32_mask(0xffff, DEFAULT_MTU, RTL930X_L3_IP6_MTU_CTRL(1)); + sw_w32_mask(0xffff0000, DEFAULT_MTU << 16, RTL930X_L3_IP_MTU_CTRL(1)); + sw_w32_mask(0xffff0000, DEFAULT_MTU << 16, RTL930X_L3_IP6_MTU_CTRL(1)); + + // Clear all source port MACs + for (i = 0; i < MAX_SMACS; i++) + rtl930x_set_l3_egress_mac(L3_EGRESS_DMACS + i, 0ULL); + + // Configure the default L3 hash algorithm + sw_w32_mask(BIT(2), 0, RTL930X_L3_HOST_TBL_CTRL); // Algorithm selection 0 = 0 + sw_w32_mask(0, BIT(3), RTL930X_L3_HOST_TBL_CTRL); // Algorithm selection 1 = 1 + + pr_info("L3_IPUC_ROUTE_CTRL %08x, IPMC_ROUTE %08x, IP6UC_ROUTE %08x, IP6MC_ROUTE %08x\n", + sw_r32(RTL930X_L3_IPUC_ROUTE_CTRL), sw_r32(RTL930X_L3_IPMC_ROUTE_CTRL), + sw_r32(RTL930X_L3_IP6UC_ROUTE_CTRL), sw_r32(RTL930X_L3_IP6MC_ROUTE_CTRL)); + sw_w32_mask(0, 1, RTL930X_L3_IPUC_ROUTE_CTRL); + sw_w32_mask(0, 1, RTL930X_L3_IP6UC_ROUTE_CTRL); + sw_w32_mask(0, 1, RTL930X_L3_IPMC_ROUTE_CTRL); + sw_w32_mask(0, 1, RTL930X_L3_IP6MC_ROUTE_CTRL); + + sw_w32(0x00002001, RTL930X_L3_IPUC_ROUTE_CTRL); + sw_w32(0x00014581, RTL930X_L3_IP6UC_ROUTE_CTRL); + sw_w32(0x00000501, RTL930X_L3_IPMC_ROUTE_CTRL); + sw_w32(0x00012881, RTL930X_L3_IP6MC_ROUTE_CTRL); + + pr_info("L3_IPUC_ROUTE_CTRL %08x, IPMC_ROUTE %08x, IP6UC_ROUTE %08x, IP6MC_ROUTE %08x\n", + sw_r32(RTL930X_L3_IPUC_ROUTE_CTRL), sw_r32(RTL930X_L3_IPMC_ROUTE_CTRL), + sw_r32(RTL930X_L3_IP6UC_ROUTE_CTRL), sw_r32(RTL930X_L3_IP6MC_ROUTE_CTRL)); + + // Trap non-ip traffic to the CPU-port (e.g. ARP so we stay reachable) + sw_w32_mask(0x3 << 8, 0x1 << 8, RTL930X_L3_IP_ROUTE_CTRL); + pr_info("L3_IP_ROUTE_CTRL %08x\n", sw_r32(RTL930X_L3_IP_ROUTE_CTRL)); + + // PORT_ISO_RESTRICT_ROUTE_CTRL ? + + // Do not use prefix route 0 because of HW limitations + set_bit(0, priv->route_use_bm); + + return 0; +} + static u32 rtl930x_packet_cntr_read(int counter) { u32 v; @@ -1709,7 +2368,7 @@ const struct rtl838x_reg rtl930x_reg = { .read_cam = rtl930x_read_cam, .write_cam = rtl930x_write_cam, .vlan_port_egr_filter = RTL930X_VLAN_PORT_EGR_FLTR, - .vlan_port_igr_filter = RTL930X_VLAN_PORT_IGR_FLTR(0), + .vlan_port_igr_filter = RTL930X_VLAN_PORT_IGR_FLTR, .vlan_port_pb = RTL930X_VLAN_PORT_PB_VLAN, .vlan_port_tag_sts_ctrl = RTL930X_VLAN_PORT_TAG_STS_CTRL, .trk_mbr_ctr = rtl930x_trk_mbr_ctr, @@ -1717,6 +2376,8 @@ const struct rtl838x_reg rtl930x_reg = { .init_eee = rtl930x_init_eee, .port_eee_set = rtl930x_port_eee_set, .eee_port_ability = rtl930x_eee_port_ability, + .l2_hash_seed = rtl930x_l2_hash_seed, + .l2_hash_key = rtl930x_l2_hash_key, .read_mcast_pmask = rtl930x_read_mcast_pmask, .write_mcast_pmask = rtl930x_write_mcast_pmask, .pie_init = rtl930x_pie_init, @@ -1726,4 +2387,17 @@ const struct rtl838x_reg rtl930x_reg = { .l2_learning_setup = rtl930x_l2_learning_setup, .packet_cntr_read = rtl930x_packet_cntr_read, .packet_cntr_clear = rtl930x_packet_cntr_clear, + .route_read = rtl930x_route_read, + .route_write = rtl930x_route_write, + .host_route_write = rtl930x_host_route_write, + .l3_setup = rtl930x_l3_setup, + .set_l3_nexthop = rtl930x_set_l3_nexthop, + .get_l3_nexthop = rtl930x_get_l3_nexthop, + .get_l3_egress_mac = rtl930x_get_l3_egress_mac, + .set_l3_egress_mac = rtl930x_set_l3_egress_mac, + .find_l3_slot = rtl930x_find_l3_slot, + .route_lookup_hw = rtl930x_route_lookup_hw, + .get_l3_router_mac = rtl930x_get_l3_router_mac, + .set_l3_router_mac = rtl930x_set_l3_router_mac, + .set_l3_egress_intf = rtl930x_set_l3_egress_intf, }; diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl931x.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl931x.c index f98bf7df29..d347b9543e 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl931x.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl931x.c @@ -384,8 +384,8 @@ const struct rtl838x_reg rtl931x_reg = { .mac_tx_pause_sts = RTL931X_MAC_TX_PAUSE_STS, .read_l2_entry_using_hash = rtl931x_read_l2_entry_using_hash, .read_cam = rtl931x_read_cam, - .vlan_port_egr_filter = RTL931X_VLAN_PORT_EGR_FLTR(0), - .vlan_port_igr_filter = RTL931X_VLAN_PORT_IGR_FLTR(0), + .vlan_port_egr_filter = RTL931X_VLAN_PORT_EGR_FLTR, + .vlan_port_igr_filter = RTL931X_VLAN_PORT_IGR_FLTR, // .vlan_port_pb = does not exist .vlan_port_tag_sts_ctrl = RTL931X_VLAN_PORT_TAG_CTRL, .trk_mbr_ctr = rtl931x_trk_mbr_ctr,