From 7dad08d738222e998bc27f67f73be713d64cecb8 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Thu, 13 Aug 2015 12:52:21 -0400 Subject: [PATCH] net: dsa: mv88e6xxx: add VLAN Purge support Add support for the VTU Load Purge operation and implement the port_vlan_del driver function to remove a port from a VLAN entry, and delete the VLAN if the given port was its last member. Signed-off-by: Vivien Didelot Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6352.c | 1 + drivers/net/dsa/mv88e6xxx.c | 113 ++++++++++++++++++++++++++++++++++++ drivers/net/dsa/mv88e6xxx.h | 2 + 3 files changed, 116 insertions(+) diff --git a/drivers/net/dsa/mv88e6352.c b/drivers/net/dsa/mv88e6352.c index e6767ce98b73..cec38bb12340 100644 --- a/drivers/net/dsa/mv88e6352.c +++ b/drivers/net/dsa/mv88e6352.c @@ -344,6 +344,7 @@ struct dsa_switch_driver mv88e6352_switch_driver = { .port_leave_bridge = mv88e6xxx_leave_bridge, .port_stp_update = mv88e6xxx_port_stp_update, .port_pvid_get = mv88e6xxx_port_pvid_get, + .port_vlan_del = mv88e6xxx_port_vlan_del, .vlan_getnext = mv88e6xxx_vlan_getnext, .port_fdb_add = mv88e6xxx_port_fdb_add, .port_fdb_del = mv88e6xxx_port_fdb_del, diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 6c86bad25c61..842392428df0 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -1254,6 +1254,32 @@ static int _mv88e6xxx_vtu_stu_data_read(struct dsa_switch *ds, return 0; } +static int _mv88e6xxx_vtu_stu_data_write(struct dsa_switch *ds, + struct mv88e6xxx_vtu_stu_entry *entry, + unsigned int nibble_offset) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + u16 regs[3] = { 0 }; + int i; + int ret; + + for (i = 0; i < ps->num_ports; ++i) { + unsigned int shift = (i % 4) * 4 + nibble_offset; + u8 data = entry->data[i]; + + regs[i / 4] |= (data & GLOBAL_VTU_STU_DATA_MASK) << shift; + } + + for (i = 0; i < 3; ++i) { + ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, + GLOBAL_VTU_DATA_0_3 + i, regs[i]); + if (ret < 0) + return ret; + } + + return 0; +} + static int _mv88e6xxx_vtu_getnext(struct dsa_switch *ds, u16 vid, struct mv88e6xxx_vtu_stu_entry *entry) { @@ -1307,6 +1333,93 @@ static int _mv88e6xxx_vtu_getnext(struct dsa_switch *ds, u16 vid, return 0; } +static int _mv88e6xxx_vtu_loadpurge(struct dsa_switch *ds, + struct mv88e6xxx_vtu_stu_entry *entry) +{ + u16 reg = 0; + int ret; + + ret = _mv88e6xxx_vtu_wait(ds); + if (ret < 0) + return ret; + + if (!entry->valid) + goto loadpurge; + + /* Write port member tags */ + ret = _mv88e6xxx_vtu_stu_data_write(ds, entry, 0); + if (ret < 0) + return ret; + + if (mv88e6xxx_6097_family(ds) || mv88e6xxx_6165_family(ds) || + mv88e6xxx_6351_family(ds) || mv88e6xxx_6352_family(ds)) { + reg = entry->sid & GLOBAL_VTU_SID_MASK; + ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_SID, reg); + if (ret < 0) + return ret; + + reg = entry->fid & GLOBAL_VTU_FID_MASK; + ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_FID, reg); + if (ret < 0) + return ret; + } + + reg = GLOBAL_VTU_VID_VALID; +loadpurge: + reg |= entry->vid & GLOBAL_VTU_VID_MASK; + ret = _mv88e6xxx_reg_write(ds, REG_GLOBAL, GLOBAL_VTU_VID, reg); + if (ret < 0) + return ret; + + return _mv88e6xxx_vtu_cmd(ds, GLOBAL_VTU_OP_VTU_LOAD_PURGE); +} + +int mv88e6xxx_port_vlan_del(struct dsa_switch *ds, int port, u16 vid) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + struct mv88e6xxx_vtu_stu_entry vlan; + bool keep = false; + int i, err; + + mutex_lock(&ps->smi_mutex); + + err = _mv88e6xxx_vtu_getnext(ds, vid - 1, &vlan); + if (err) + goto unlock; + + if (vlan.vid != vid || !vlan.valid || + vlan.data[port] == GLOBAL_VTU_DATA_MEMBER_TAG_NON_MEMBER) { + err = -ENOENT; + goto unlock; + } + + vlan.data[port] = GLOBAL_VTU_DATA_MEMBER_TAG_NON_MEMBER; + + /* keep the VLAN unless all ports are excluded */ + for (i = 0; i < ps->num_ports; ++i) { + if (dsa_is_cpu_port(ds, i)) + continue; + + if (vlan.data[i] != GLOBAL_VTU_DATA_MEMBER_TAG_NON_MEMBER) { + keep = true; + break; + } + } + + vlan.valid = keep; + err = _mv88e6xxx_vtu_loadpurge(ds, &vlan); + if (err) + goto unlock; + + if (!keep) + clear_bit(vlan.fid, ps->fid_bitmap); + +unlock: + mutex_unlock(&ps->smi_mutex); + + return err; +} + static int _mv88e6xxx_port_vtu_getnext(struct dsa_switch *ds, int port, u16 vid, struct mv88e6xxx_vtu_stu_entry *entry) { diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h index bb6fa9a641de..c70a3c1fcc2b 100644 --- a/drivers/net/dsa/mv88e6xxx.h +++ b/drivers/net/dsa/mv88e6xxx.h @@ -195,6 +195,7 @@ #define GLOBAL_VTU_OP 0x05 #define GLOBAL_VTU_OP_BUSY BIT(15) #define GLOBAL_VTU_OP_FLUSH_ALL ((0x01 << 12) | GLOBAL_VTU_OP_BUSY) +#define GLOBAL_VTU_OP_VTU_LOAD_PURGE ((0x03 << 12) | GLOBAL_VTU_OP_BUSY) #define GLOBAL_VTU_OP_VTU_GET_NEXT ((0x04 << 12) | GLOBAL_VTU_OP_BUSY) #define GLOBAL_VTU_VID 0x06 #define GLOBAL_VTU_VID_MASK 0xfff @@ -453,6 +454,7 @@ int mv88e6xxx_join_bridge(struct dsa_switch *ds, int port, u32 br_port_mask); int mv88e6xxx_leave_bridge(struct dsa_switch *ds, int port, u32 br_port_mask); int mv88e6xxx_port_stp_update(struct dsa_switch *ds, int port, u8 state); int mv88e6xxx_port_pvid_get(struct dsa_switch *ds, int port, u16 *vid); +int mv88e6xxx_port_vlan_del(struct dsa_switch *ds, int port, u16 vid); int mv88e6xxx_vlan_getnext(struct dsa_switch *ds, u16 *vid, unsigned long *ports, unsigned long *untagged); int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port, -- 2.20.1