--- /dev/null
+/*
+ * Texas Instruments 3-Port Ethernet Switch Address Lookup Engine
+ *
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/stat.h>
+#include <linux/sysfs.h>
+
+#include "cpsw_ale.h"
+
+#define BITMASK(bits) (BIT(bits) - 1)
+#define ALE_ENTRY_BITS 68
+#define ALE_ENTRY_WORDS DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
+
+#define ALE_VERSION_MAJOR(rev) ((rev >> 8) & 0xff)
+#define ALE_VERSION_MINOR(rev) (rev & 0xff)
+
+/* ALE Registers */
+#define ALE_IDVER 0x00
+#define ALE_CONTROL 0x08
+#define ALE_PRESCALE 0x10
+#define ALE_UNKNOWNVLAN 0x18
+#define ALE_TABLE_CONTROL 0x20
+#define ALE_TABLE 0x34
+#define ALE_PORTCTL 0x40
+
+#define ALE_TABLE_WRITE BIT(31)
+
+#define ALE_TYPE_FREE 0
+#define ALE_TYPE_ADDR 1
+#define ALE_TYPE_VLAN 2
+#define ALE_TYPE_VLAN_ADDR 3
+
+#define ALE_UCAST_PERSISTANT 0
+#define ALE_UCAST_UNTOUCHED 1
+#define ALE_UCAST_OUI 2
+#define ALE_UCAST_TOUCHED 3
+
+static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
+{
+ int idx;
+
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+ return (ale_entry[idx] >> start) & BITMASK(bits);
+}
+
+static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
+ u32 value)
+{
+ int idx;
+
+ value &= BITMASK(bits);
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+ ale_entry[idx] &= ~(BITMASK(bits) << start);
+ ale_entry[idx] |= (value << start);
+}
+
+#define DEFINE_ALE_FIELD(name, start, bits) \
+static inline int cpsw_ale_get_##name(u32 *ale_entry) \
+{ \
+ return cpsw_ale_get_field(ale_entry, start, bits); \
+} \
+static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value) \
+{ \
+ cpsw_ale_set_field(ale_entry, start, bits, value); \
+}
+
+DEFINE_ALE_FIELD(entry_type, 60, 2)
+DEFINE_ALE_FIELD(vlan_id, 48, 12)
+DEFINE_ALE_FIELD(mcast_state, 62, 2)
+DEFINE_ALE_FIELD(port_mask, 66, 3)
+DEFINE_ALE_FIELD(super, 65, 1)
+DEFINE_ALE_FIELD(ucast_type, 62, 2)
+DEFINE_ALE_FIELD(port_num, 66, 2)
+DEFINE_ALE_FIELD(blocked, 65, 1)
+DEFINE_ALE_FIELD(secure, 64, 1)
+DEFINE_ALE_FIELD(vlan_untag_force, 24, 3)
+DEFINE_ALE_FIELD(vlan_reg_mcast, 16, 3)
+DEFINE_ALE_FIELD(vlan_unreg_mcast, 8, 3)
+DEFINE_ALE_FIELD(vlan_member_list, 0, 3)
+DEFINE_ALE_FIELD(mcast, 40, 1)
+
+/* The MAC address field in the ALE entry cannot be macroized as above */
+static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
+}
+
+static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
+}
+
+static int cpsw_ale_read(struct cpsw_ale *ale, int idx, u32 *ale_entry)
+{
+ int i;
+
+ WARN_ON(idx > ale->params.ale_entries);
+
+ __raw_writel(idx, ale->params.ale_regs + ALE_TABLE_CONTROL);
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ ale_entry[i] = __raw_readl(ale->params.ale_regs +
+ ALE_TABLE + 4 * i);
+
+ return idx;
+}
+
+static int cpsw_ale_write(struct cpsw_ale *ale, int idx, u32 *ale_entry)
+{
+ int i;
+
+ WARN_ON(idx > ale->params.ale_entries);
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ __raw_writel(ale_entry[i], ale->params.ale_regs +
+ ALE_TABLE + 4 * i);
+
+ __raw_writel(idx | ALE_TABLE_WRITE, ale->params.ale_regs +
+ ALE_TABLE_CONTROL);
+
+ return idx;
+}
+
+static int cpsw_ale_match_addr(struct cpsw_ale *ale, u8 *addr)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < ale->params.ale_entries; idx++) {
+ u8 entry_addr[6];
+
+ cpsw_ale_read(ale, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+ cpsw_ale_get_addr(ale_entry, entry_addr);
+ if (memcmp(entry_addr, addr, 6) == 0)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static int cpsw_ale_match_free(struct cpsw_ale *ale)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < ale->params.ale_entries; idx++) {
+ cpsw_ale_read(ale, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type == ALE_TYPE_FREE)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static int cpsw_ale_find_ageable(struct cpsw_ale *ale)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < ale->params.ale_entries; idx++) {
+ cpsw_ale_read(ale, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+ if (cpsw_ale_get_mcast(ale_entry))
+ continue;
+ type = cpsw_ale_get_ucast_type(ale_entry);
+ if (type != ALE_UCAST_PERSISTANT &&
+ type != ALE_UCAST_OUI)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static void cpsw_ale_flush_mcast(struct cpsw_ale *ale, u32 *ale_entry,
+ int port_mask)
+{
+ int mask;
+
+ mask = cpsw_ale_get_port_mask(ale_entry);
+ if ((mask & port_mask) == 0)
+ return; /* ports dont intersect, not interested */
+ mask &= ~port_mask;
+
+ /* free if only remaining port is host port */
+ if (mask == BIT(ale->params.ale_ports))
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+ else
+ cpsw_ale_set_port_mask(ale_entry, mask);
+}
+
+static void cpsw_ale_flush_ucast(struct cpsw_ale *ale, u32 *ale_entry,
+ int port_mask)
+{
+ int port;
+
+ port = cpsw_ale_get_port_num(ale_entry);
+ if ((BIT(port) & port_mask) == 0)
+ return; /* ports dont intersect, not interested */
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+}
+
+int cpsw_ale_flush(struct cpsw_ale *ale, int port_mask)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int ret, idx;
+
+ for (idx = 0; idx < ale->params.ale_entries; idx++) {
+ cpsw_ale_read(ale, idx, ale_entry);
+ ret = cpsw_ale_get_entry_type(ale_entry);
+ if (ret != ALE_TYPE_ADDR && ret != ALE_TYPE_VLAN_ADDR)
+ continue;
+
+ if (cpsw_ale_get_mcast(ale_entry))
+ cpsw_ale_flush_mcast(ale, ale_entry, port_mask);
+ else
+ cpsw_ale_flush_ucast(ale, ale_entry, port_mask);
+
+ cpsw_ale_write(ale, idx, ale_entry);
+ }
+ return 0;
+}
+
+int cpsw_ale_add_ucast(struct cpsw_ale *ale, u8 *addr, int port, int flags)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx;
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
+ cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
+ cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
+ cpsw_ale_set_port_num(ale_entry, port);
+
+ idx = cpsw_ale_match_addr(ale, addr);
+ if (idx < 0)
+ idx = cpsw_ale_match_free(ale);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(ale);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(ale, idx, ale_entry);
+ return 0;
+}
+
+int cpsw_ale_del_ucast(struct cpsw_ale *ale, u8 *addr, int port)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx;
+
+ idx = cpsw_ale_match_addr(ale, addr);
+ if (idx < 0)
+ return -ENOENT;
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+ cpsw_ale_write(ale, idx, ale_entry);
+ return 0;
+}
+
+int cpsw_ale_add_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask,
+ int super, int mcast_state)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx, mask;
+
+ idx = cpsw_ale_match_addr(ale, addr);
+ if (idx >= 0)
+ cpsw_ale_read(ale, idx, ale_entry);
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_super(ale_entry, super);
+ cpsw_ale_set_mcast_state(ale_entry, mcast_state);
+
+ mask = cpsw_ale_get_port_mask(ale_entry);
+ port_mask |= mask;
+ cpsw_ale_set_port_mask(ale_entry, port_mask);
+
+ if (idx < 0)
+ idx = cpsw_ale_match_free(ale);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(ale);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(ale, idx, ale_entry);
+ return 0;
+}
+
+int cpsw_ale_del_mcast(struct cpsw_ale *ale, u8 *addr, int port_mask)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx;
+
+ idx = cpsw_ale_match_addr(ale, addr);
+ if (idx < 0)
+ return -EINVAL;
+
+ cpsw_ale_read(ale, idx, ale_entry);
+
+ if (port_mask)
+ cpsw_ale_set_port_mask(ale_entry, port_mask);
+ else
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_FREE);
+
+ cpsw_ale_write(ale, idx, ale_entry);
+ return 0;
+}
+
+struct ale_control_info {
+ const char *name;
+ int offset, port_offset;
+ int shift, port_shift;
+ int bits;
+};
+
+static const struct ale_control_info ale_controls[ALE_NUM_CONTROLS] = {
+ [ALE_ENABLE] = {
+ .name = "enable",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 31,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_CLEAR] = {
+ .name = "clear",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 30,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_AGEOUT] = {
+ .name = "ageout",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 29,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_VLAN_NOLEARN] = {
+ .name = "vlan_nolearn",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 7,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_NO_PORT_VLAN] = {
+ .name = "no_port_vlan",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 6,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_OUI_DENY] = {
+ .name = "oui_deny",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 5,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_BYPASS] = {
+ .name = "bypass",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 4,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_RATE_LIMIT_TX] = {
+ .name = "rate_limit_tx",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 3,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_VLAN_AWARE] = {
+ .name = "vlan_aware",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 2,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_AUTH_ENABLE] = {
+ .name = "auth_enable",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 1,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_RATE_LIMIT] = {
+ .name = "rate_limit",
+ .offset = ALE_CONTROL,
+ .port_offset = 0,
+ .shift = 0,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_PORT_STATE] = {
+ .name = "port_state",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 0,
+ .port_shift = 0,
+ .bits = 2,
+ },
+ [ALE_PORT_DROP_UNTAGGED] = {
+ .name = "drop_untagged",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 2,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_PORT_DROP_UNKNOWN_VLAN] = {
+ .name = "drop_unknown",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 3,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_PORT_NOLEARN] = {
+ .name = "nolearn",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 4,
+ .port_shift = 0,
+ .bits = 1,
+ },
+ [ALE_PORT_MCAST_LIMIT] = {
+ .name = "mcast_limit",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 16,
+ .port_shift = 0,
+ .bits = 8,
+ },
+ [ALE_PORT_BCAST_LIMIT] = {
+ .name = "bcast_limit",
+ .offset = ALE_PORTCTL,
+ .port_offset = 4,
+ .shift = 24,
+ .port_shift = 0,
+ .bits = 8,
+ },
+ [ALE_PORT_UNKNOWN_VLAN_MEMBER] = {
+ .name = "unknown_vlan_member",
+ .offset = ALE_UNKNOWNVLAN,
+ .port_offset = 0,
+ .shift = 0,
+ .port_shift = 0,
+ .bits = 6,
+ },
+ [ALE_PORT_UNKNOWN_MCAST_FLOOD] = {
+ .name = "unknown_mcast_flood",
+ .offset = ALE_UNKNOWNVLAN,
+ .port_offset = 0,
+ .shift = 8,
+ .port_shift = 0,
+ .bits = 6,
+ },
+ [ALE_PORT_UNKNOWN_REG_MCAST_FLOOD] = {
+ .name = "unknown_reg_flood",
+ .offset = ALE_UNKNOWNVLAN,
+ .port_offset = 0,
+ .shift = 16,
+ .port_shift = 0,
+ .bits = 6,
+ },
+ [ALE_PORT_UNTAGGED_EGRESS] = {
+ .name = "untagged_egress",
+ .offset = ALE_UNKNOWNVLAN,
+ .port_offset = 0,
+ .shift = 24,
+ .port_shift = 0,
+ .bits = 6,
+ },
+};
+
+int cpsw_ale_control_set(struct cpsw_ale *ale, int port, int control,
+ int value)
+{
+ const struct ale_control_info *info;
+ int offset, shift;
+ u32 tmp, mask;
+
+ if (control < 0 || control >= ARRAY_SIZE(ale_controls))
+ return -EINVAL;
+
+ info = &ale_controls[control];
+ if (info->port_offset == 0 && info->port_shift == 0)
+ port = 0; /* global, port is a dont care */
+
+ if (port < 0 || port > ale->params.ale_ports)
+ return -EINVAL;
+
+ mask = BITMASK(info->bits);
+ if (value & ~mask)
+ return -EINVAL;
+
+ offset = info->offset + (port * info->port_offset);
+ shift = info->shift + (port * info->port_shift);
+
+ tmp = __raw_readl(ale->params.ale_regs + offset);
+ tmp = (tmp & ~(mask << shift)) | (value << shift);
+ __raw_writel(tmp, ale->params.ale_regs + offset);
+
+ return 0;
+}
+
+int cpsw_ale_control_get(struct cpsw_ale *ale, int port, int control)
+{
+ const struct ale_control_info *info;
+ int offset, shift;
+ u32 tmp;
+
+ if (control < 0 || control >= ARRAY_SIZE(ale_controls))
+ return -EINVAL;
+
+ info = &ale_controls[control];
+ if (info->port_offset == 0 && info->port_shift == 0)
+ port = 0; /* global, port is a dont care */
+
+ if (port < 0 || port > ale->params.ale_ports)
+ return -EINVAL;
+
+ offset = info->offset + (port * info->port_offset);
+ shift = info->shift + (port * info->port_shift);
+
+ tmp = __raw_readl(ale->params.ale_regs + offset) >> shift;
+ return tmp & BITMASK(info->bits);
+}
+
+static void cpsw_ale_timer(unsigned long arg)
+{
+ struct cpsw_ale *ale = (struct cpsw_ale *)arg;
+
+ cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
+
+ if (ale->ageout) {
+ ale->timer.expires = jiffies + ale->ageout;
+ add_timer(&ale->timer);
+ }
+}
+
+int cpsw_ale_set_ageout(struct cpsw_ale *ale, int ageout)
+{
+ del_timer_sync(&ale->timer);
+ ale->ageout = ageout * HZ;
+ if (ale->ageout) {
+ ale->timer.expires = jiffies + ale->ageout;
+ add_timer(&ale->timer);
+ }
+ return 0;
+}
+
+void cpsw_ale_start(struct cpsw_ale *ale)
+{
+ u32 rev;
+
+ rev = __raw_readl(ale->params.ale_regs + ALE_IDVER);
+ dev_dbg(ale->params.dev, "initialized cpsw ale revision %d.%d\n",
+ ALE_VERSION_MAJOR(rev), ALE_VERSION_MINOR(rev));
+ cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
+ cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
+
+ init_timer(&ale->timer);
+ ale->timer.data = (unsigned long)ale;
+ ale->timer.function = cpsw_ale_timer;
+ if (ale->ageout) {
+ ale->timer.expires = jiffies + ale->ageout;
+ add_timer(&ale->timer);
+ }
+}
+
+void cpsw_ale_stop(struct cpsw_ale *ale)
+{
+ del_timer_sync(&ale->timer);
+}
+
+struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params)
+{
+ struct cpsw_ale *ale;
+
+ ale = kzalloc(sizeof(*ale), GFP_KERNEL);
+ if (!ale)
+ return NULL;
+
+ ale->params = *params;
+ ale->ageout = ale->params.ale_ageout * HZ;
+
+ return ale;
+}
+
+int cpsw_ale_destroy(struct cpsw_ale *ale)
+{
+ if (!ale)
+ return -EINVAL;
+ cpsw_ale_stop(ale);
+ cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
+ kfree(ale);
+ return 0;
+}
projects / mirror_ubuntu-eoan-kernel.git / commitdiff