diff options
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/bcm_sf2.c | 236 | ||||
| -rw-r--r-- | drivers/net/dsa/bcm_sf2.h | 56 | ||||
| -rw-r--r-- | drivers/net/dsa/bcm_sf2_regs.h | 43 |
3 files changed, 335 insertions, 0 deletions
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index 9d56515f4c4d..4f32b8a530bf 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -25,6 +25,8 @@ #include <linux/ethtool.h> #include <linux/if_bridge.h> #include <linux/brcmphy.h> +#include <linux/etherdevice.h> +#include <net/switchdev.h> #include "bcm_sf2.h" #include "bcm_sf2_regs.h" @@ -555,6 +557,236 @@ static int bcm_sf2_sw_br_set_stp_state(struct dsa_switch *ds, int port, return 0; } +/* Address Resolution Logic routines */ +static int bcm_sf2_arl_op_wait(struct bcm_sf2_priv *priv) +{ + unsigned int timeout = 10; + u32 reg; + + do { + reg = core_readl(priv, CORE_ARLA_RWCTL); + if (!(reg & ARL_STRTDN)) + return 0; + + usleep_range(1000, 2000); + } while (timeout--); + + return -ETIMEDOUT; +} + +static int bcm_sf2_arl_rw_op(struct bcm_sf2_priv *priv, unsigned int op) +{ + u32 cmd; + + if (op > ARL_RW) + return -EINVAL; + + cmd = core_readl(priv, CORE_ARLA_RWCTL); + cmd &= ~IVL_SVL_SELECT; + cmd |= ARL_STRTDN; + if (op) + cmd |= ARL_RW; + else + cmd &= ~ARL_RW; + core_writel(priv, cmd, CORE_ARLA_RWCTL); + + return bcm_sf2_arl_op_wait(priv); +} + +static int bcm_sf2_arl_read(struct bcm_sf2_priv *priv, u64 mac, + u16 vid, struct bcm_sf2_arl_entry *ent, u8 *idx, + bool is_valid) +{ + unsigned int i; + int ret; + + ret = bcm_sf2_arl_op_wait(priv); + if (ret) + return ret; + + /* Read the 4 bins */ + for (i = 0; i < 4; i++) { + u64 mac_vid; + u32 fwd_entry; + + mac_vid = core_readq(priv, CORE_ARLA_MACVID_ENTRY(i)); + fwd_entry = core_readl(priv, CORE_ARLA_FWD_ENTRY(i)); + bcm_sf2_arl_to_entry(ent, mac_vid, fwd_entry); + + if (ent->is_valid && is_valid) { + *idx = i; + return 0; + } + + /* This is the MAC we just deleted */ + if (!is_valid && (mac_vid & mac)) + return 0; + } + + return -ENOENT; +} + +static int bcm_sf2_arl_op(struct bcm_sf2_priv *priv, int op, int port, + const unsigned char *addr, u16 vid, bool is_valid) +{ + struct bcm_sf2_arl_entry ent; + u32 fwd_entry; + u64 mac, mac_vid = 0; + u8 idx = 0; + int ret; + + /* Convert the array into a 64-bit MAC */ + mac = bcm_sf2_mac_to_u64(addr); + + /* Perform a read for the given MAC and VID */ + core_writeq(priv, mac, CORE_ARLA_MAC); + core_writel(priv, vid, CORE_ARLA_VID); + + /* Issue a read operation for this MAC */ + ret = bcm_sf2_arl_rw_op(priv, 1); + if (ret) + return ret; + + ret = bcm_sf2_arl_read(priv, mac, vid, &ent, &idx, is_valid); + /* If this is a read, just finish now */ + if (op) + return ret; + + /* We could not find a matching MAC, so reset to a new entry */ + if (ret) { + fwd_entry = 0; + idx = 0; + } + + memset(&ent, 0, sizeof(ent)); + ent.port = port; + ent.is_valid = is_valid; + ent.vid = vid; + ent.is_static = true; + memcpy(ent.mac, addr, ETH_ALEN); + bcm_sf2_arl_from_entry(&mac_vid, &fwd_entry, &ent); + + core_writeq(priv, mac_vid, CORE_ARLA_MACVID_ENTRY(idx)); + core_writel(priv, fwd_entry, CORE_ARLA_FWD_ENTRY(idx)); + + ret = bcm_sf2_arl_rw_op(priv, 0); + if (ret) + return ret; + + /* Re-read the entry to check */ + return bcm_sf2_arl_read(priv, mac, vid, &ent, &idx, is_valid); +} + +static int bcm_sf2_sw_fdb_prepare(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + /* We do not need to do anything specific here yet */ + return 0; +} + +static int bcm_sf2_sw_fdb_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + struct bcm_sf2_priv *priv = ds_to_priv(ds); + + return bcm_sf2_arl_op(priv, 0, port, fdb->addr, fdb->vid, true); +} + +static int bcm_sf2_sw_fdb_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb) +{ + struct bcm_sf2_priv *priv = ds_to_priv(ds); + + return bcm_sf2_arl_op(priv, 0, port, fdb->addr, fdb->vid, false); +} + +static int bcm_sf2_arl_search_wait(struct bcm_sf2_priv *priv) +{ + unsigned timeout = 1000; + u32 reg; + + do { + reg = core_readl(priv, CORE_ARLA_SRCH_CTL); + if (!(reg & ARLA_SRCH_STDN)) + return 0; + + if (reg & ARLA_SRCH_VLID) + return 0; + + usleep_range(1000, 2000); + } while (timeout--); + + return -ETIMEDOUT; +} + +static void bcm_sf2_arl_search_rd(struct bcm_sf2_priv *priv, u8 idx, + struct bcm_sf2_arl_entry *ent) +{ + u64 mac_vid; + u32 fwd_entry; + + mac_vid = core_readq(priv, CORE_ARLA_SRCH_RSLT_MACVID(idx)); + fwd_entry = core_readl(priv, CORE_ARLA_SRCH_RSLT(idx)); + bcm_sf2_arl_to_entry(ent, mac_vid, fwd_entry); +} + +static int bcm_sf2_sw_fdb_copy(struct net_device *dev, int port, + const struct bcm_sf2_arl_entry *ent, + struct switchdev_obj_port_fdb *fdb, + int (*cb)(struct switchdev_obj *obj)) +{ + if (!ent->is_valid) + return 0; + + if (port != ent->port) + return 0; + + ether_addr_copy(fdb->addr, ent->mac); + fdb->vid = ent->vid; + fdb->ndm_state = ent->is_static ? NUD_NOARP : NUD_REACHABLE; + + return cb(&fdb->obj); +} + +static int bcm_sf2_sw_fdb_dump(struct dsa_switch *ds, int port, + struct switchdev_obj_port_fdb *fdb, + int (*cb)(struct switchdev_obj *obj)) +{ + struct bcm_sf2_priv *priv = ds_to_priv(ds); + struct net_device *dev = ds->ports[port]; + struct bcm_sf2_arl_entry results[2]; + unsigned int count = 0; + int ret; + + /* Start search operation */ + core_writel(priv, ARLA_SRCH_STDN, CORE_ARLA_SRCH_CTL); + + do { + ret = bcm_sf2_arl_search_wait(priv); + if (ret) + return ret; + + /* Read both entries, then return their values back */ + bcm_sf2_arl_search_rd(priv, 0, &results[0]); + ret = bcm_sf2_sw_fdb_copy(dev, port, &results[0], fdb, cb); + if (ret) + return ret; + + bcm_sf2_arl_search_rd(priv, 1, &results[1]); + ret = bcm_sf2_sw_fdb_copy(dev, port, &results[1], fdb, cb); + if (ret) + return ret; + + if (!results[0].is_valid && !results[1].is_valid) + break; + + } while (count++ < CORE_ARLA_NUM_ENTRIES); + + return 0; +} + static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id) { struct bcm_sf2_priv *priv = dev_id; @@ -1076,6 +1308,10 @@ static struct dsa_switch_driver bcm_sf2_switch_driver = { .port_join_bridge = bcm_sf2_sw_br_join, .port_leave_bridge = bcm_sf2_sw_br_leave, .port_stp_update = bcm_sf2_sw_br_set_stp_state, + .port_fdb_prepare = bcm_sf2_sw_fdb_prepare, + .port_fdb_add = bcm_sf2_sw_fdb_add, + .port_fdb_del = bcm_sf2_sw_fdb_del, + .port_fdb_dump = bcm_sf2_sw_fdb_dump, }; static int __init bcm_sf2_init(void) diff --git a/drivers/net/dsa/bcm_sf2.h b/drivers/net/dsa/bcm_sf2.h index 789d7b7737da..cc98abc0aaf3 100644 --- a/drivers/net/dsa/bcm_sf2.h +++ b/drivers/net/dsa/bcm_sf2.h @@ -19,6 +19,8 @@ #include <linux/mutex.h> #include <linux/mii.h> #include <linux/ethtool.h> +#include <linux/types.h> +#include <linux/bitops.h> #include <net/dsa.h> @@ -50,6 +52,60 @@ struct bcm_sf2_port_status { u32 vlan_ctl_mask; }; +struct bcm_sf2_arl_entry { + u8 port; + u8 mac[ETH_ALEN]; + u16 vid; + u8 is_valid:1; + u8 is_age:1; + u8 is_static:1; +}; + +static inline void bcm_sf2_mac_from_u64(u64 src, u8 *dst) +{ + unsigned int i; + + for (i = 0; i < ETH_ALEN; i++) + dst[ETH_ALEN - 1 - i] = (src >> (8 * i)) & 0xff; +} + +static inline u64 bcm_sf2_mac_to_u64(const u8 *src) +{ + unsigned int i; + u64 dst = 0; + + for (i = 0; i < ETH_ALEN; i++) + dst |= (u64)src[ETH_ALEN - 1 - i] << (8 * i); + + return dst; +} + +static inline void bcm_sf2_arl_to_entry(struct bcm_sf2_arl_entry *ent, + u64 mac_vid, u32 fwd_entry) +{ + memset(ent, 0, sizeof(*ent)); + ent->port = fwd_entry & PORTID_MASK; + ent->is_valid = !!(fwd_entry & ARL_VALID); + ent->is_age = !!(fwd_entry & ARL_AGE); + ent->is_static = !!(fwd_entry & ARL_STATIC); + bcm_sf2_mac_from_u64(mac_vid, ent->mac); + ent->vid = mac_vid >> VID_SHIFT; +} + +static inline void bcm_sf2_arl_from_entry(u64 *mac_vid, u32 *fwd_entry, + const struct bcm_sf2_arl_entry *ent) +{ + *mac_vid = bcm_sf2_mac_to_u64(ent->mac); + *mac_vid |= (u64)(ent->vid & VID_MASK) << VID_SHIFT; + *fwd_entry = ent->port & PORTID_MASK; + if (ent->is_valid) + *fwd_entry |= ARL_VALID; + if (ent->is_static) + *fwd_entry |= ARL_STATIC; + if (ent->is_age) + *fwd_entry |= ARL_AGE; +} + struct bcm_sf2_priv { /* Base registers, keep those in order with BCM_SF2_REGS_NAME */ void __iomem *core; diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h index fa4e6e78c9ea..97780d43b5c0 100644 --- a/drivers/net/dsa/bcm_sf2_regs.h +++ b/drivers/net/dsa/bcm_sf2_regs.h @@ -231,6 +231,49 @@ #define CORE_BRCM_HDR_RX_DIS 0x0980 #define CORE_BRCM_HDR_TX_DIS 0x0988 +#define CORE_ARLA_NUM_ENTRIES 1024 + +#define CORE_ARLA_RWCTL 0x1400 +#define ARL_RW (1 << 0) +#define IVL_SVL_SELECT (1 << 6) +#define ARL_STRTDN (1 << 7) + +#define CORE_ARLA_MAC 0x1408 +#define CORE_ARLA_VID 0x1420 +#define ARLA_VIDTAB_INDX_MASK 0x1fff + +#define CORE_ARLA_MACVID0 0x1440 +#define MAC_MASK 0xffffffffff +#define VID_SHIFT 48 +#define VID_MASK 0xfff + +#define CORE_ARLA_FWD_ENTRY0 0x1460 +#define PORTID_MASK 0x1ff +#define ARL_CON_SHIFT 9 +#define ARL_CON_MASK 0x3 +#define ARL_PRI_SHIFT 11 +#define ARL_PRI_MASK 0x7 +#define ARL_AGE (1 << 14) +#define ARL_STATIC (1 << 15) +#define ARL_VALID (1 << 16) + +#define CORE_ARLA_MACVID_ENTRY(x) (CORE_ARLA_MACVID0 + ((x) * 0x40)) +#define CORE_ARLA_FWD_ENTRY(x) (CORE_ARLA_FWD_ENTRY0 + ((x) * 0x40)) + +#define CORE_ARLA_SRCH_CTL 0x1540 +#define ARLA_SRCH_VLID (1 << 0) +#define IVL_SVL_SELECT (1 << 6) +#define ARLA_SRCH_STDN (1 << 7) + +#define CORE_ARLA_SRCH_ADR 0x1544 +#define ARLA_SRCH_ADR_VALID (1 << 15) + +#define CORE_ARLA_SRCH_RSLT_0_MACVID 0x1580 +#define CORE_ARLA_SRCH_RSLT_0 0x15a0 + +#define CORE_ARLA_SRCH_RSLT_MACVID(x) (CORE_ARLA_SRCH_RSLT_0_MACVID + ((x) * 0x40)) +#define CORE_ARLA_SRCH_RSLT(x) (CORE_ARLA_SRCH_RSLT_0 + ((x) * 0x40)) + #define CORE_MEM_PSM_VDD_CTRL 0x2380 #define P_TXQ_PSM_VDD_SHIFT 2 #define P_TXQ_PSM_VDD_MASK 0x3 |