516 lines
11 KiB
C
516 lines
11 KiB
C
/*
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* Marvell 88E6xxx VLAN [Spanning Tree] Translation Unit (VTU [STU]) support
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*
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* Copyright (c) 2008 Marvell Semiconductor
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* Copyright (c) 2015 CMC Electronics, Inc.
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* Copyright (c) 2017 Savoir-faire Linux, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include "chip.h"
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#include "global1.h"
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/* Offset 0x02: VTU FID Register */
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static int mv88e6xxx_g1_vtu_fid_read(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val;
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int err;
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err = mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_FID, &val);
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if (err)
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return err;
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entry->fid = val & MV88E6352_G1_VTU_FID_MASK;
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return 0;
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}
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static int mv88e6xxx_g1_vtu_fid_write(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val = entry->fid & MV88E6352_G1_VTU_FID_MASK;
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return mv88e6xxx_g1_write(chip, MV88E6352_G1_VTU_FID, val);
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}
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/* Offset 0x03: VTU SID Register */
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static int mv88e6xxx_g1_vtu_sid_read(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val;
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int err;
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err = mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_SID, &val);
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if (err)
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return err;
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entry->sid = val & MV88E6352_G1_VTU_SID_MASK;
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return 0;
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}
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static int mv88e6xxx_g1_vtu_sid_write(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val = entry->sid & MV88E6352_G1_VTU_SID_MASK;
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return mv88e6xxx_g1_write(chip, MV88E6352_G1_VTU_SID, val);
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}
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/* Offset 0x05: VTU Operation Register */
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static int mv88e6xxx_g1_vtu_op_wait(struct mv88e6xxx_chip *chip)
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{
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return mv88e6xxx_g1_wait(chip, MV88E6XXX_G1_VTU_OP,
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MV88E6XXX_G1_VTU_OP_BUSY);
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}
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static int mv88e6xxx_g1_vtu_op(struct mv88e6xxx_chip *chip, u16 op)
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{
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int err;
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err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_OP,
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MV88E6XXX_G1_VTU_OP_BUSY | op);
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if (err)
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return err;
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return mv88e6xxx_g1_vtu_op_wait(chip);
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}
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/* Offset 0x06: VTU VID Register */
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static int mv88e6xxx_g1_vtu_vid_read(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val;
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int err;
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err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_VID, &val);
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if (err)
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return err;
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entry->vid = val & 0xfff;
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if (val & MV88E6390_G1_VTU_VID_PAGE)
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entry->vid |= 0x1000;
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entry->valid = !!(val & MV88E6XXX_G1_VTU_VID_VALID);
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return 0;
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}
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static int mv88e6xxx_g1_vtu_vid_write(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val = entry->vid & 0xfff;
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if (entry->vid & 0x1000)
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val |= MV88E6390_G1_VTU_VID_PAGE;
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if (entry->valid)
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val |= MV88E6XXX_G1_VTU_VID_VALID;
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return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_VID, val);
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}
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/* Offset 0x07: VTU/STU Data Register 1
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* Offset 0x08: VTU/STU Data Register 2
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* Offset 0x09: VTU/STU Data Register 3
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*/
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static int mv88e6185_g1_vtu_data_read(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 regs[3];
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int i;
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/* Read all 3 VTU/STU Data registers */
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for (i = 0; i < 3; ++i) {
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u16 *reg = ®s[i];
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int err;
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err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg);
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if (err)
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return err;
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}
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/* Extract MemberTag and PortState data */
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for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) {
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unsigned int member_offset = (i % 4) * 4;
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unsigned int state_offset = member_offset + 2;
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entry->member[i] = (regs[i / 4] >> member_offset) & 0x3;
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entry->state[i] = (regs[i / 4] >> state_offset) & 0x3;
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}
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return 0;
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}
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static int mv88e6185_g1_vtu_data_write(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 regs[3] = { 0 };
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int i;
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/* Insert MemberTag and PortState data */
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for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) {
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unsigned int member_offset = (i % 4) * 4;
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unsigned int state_offset = member_offset + 2;
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regs[i / 4] |= (entry->member[i] & 0x3) << member_offset;
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regs[i / 4] |= (entry->state[i] & 0x3) << state_offset;
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}
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/* Write all 3 VTU/STU Data registers */
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for (i = 0; i < 3; ++i) {
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u16 reg = regs[i];
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int err;
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err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg);
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if (err)
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return err;
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}
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return 0;
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}
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static int mv88e6390_g1_vtu_data_read(struct mv88e6xxx_chip *chip, u8 *data)
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{
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u16 regs[2];
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int i;
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/* Read the 2 VTU/STU Data registers */
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for (i = 0; i < 2; ++i) {
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u16 *reg = ®s[i];
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int err;
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err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg);
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if (err)
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return err;
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}
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/* Extract data */
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for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) {
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unsigned int offset = (i % 8) * 2;
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data[i] = (regs[i / 8] >> offset) & 0x3;
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}
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return 0;
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}
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static int mv88e6390_g1_vtu_data_write(struct mv88e6xxx_chip *chip, u8 *data)
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{
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u16 regs[2] = { 0 };
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int i;
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/* Insert data */
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for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) {
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unsigned int offset = (i % 8) * 2;
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regs[i / 8] |= (data[i] & 0x3) << offset;
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}
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/* Write the 2 VTU/STU Data registers */
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for (i = 0; i < 2; ++i) {
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u16 reg = regs[i];
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int err;
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err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg);
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if (err)
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return err;
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}
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return 0;
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}
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/* VLAN Translation Unit Operations */
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static int mv88e6xxx_g1_vtu_stu_getnext(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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err = mv88e6xxx_g1_vtu_sid_write(chip, entry);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_STU_GET_NEXT);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_sid_read(chip, entry);
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if (err)
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return err;
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return mv88e6xxx_g1_vtu_vid_read(chip, entry);
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}
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static int mv88e6xxx_g1_vtu_stu_get(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *vtu)
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{
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struct mv88e6xxx_vtu_entry stu;
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int err;
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err = mv88e6xxx_g1_vtu_sid_read(chip, vtu);
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if (err)
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return err;
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stu.sid = vtu->sid - 1;
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err = mv88e6xxx_g1_vtu_stu_getnext(chip, &stu);
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if (err)
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return err;
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if (stu.sid != vtu->sid || !stu.valid)
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return -EINVAL;
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return 0;
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}
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static int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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err = mv88e6xxx_g1_vtu_op_wait(chip);
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if (err)
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return err;
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/* To get the next higher active VID, the VTU GetNext operation can be
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* started again without setting the VID registers since it already
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* contains the last VID.
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*
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* To save a few hardware accesses and abstract this to the caller,
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* write the VID only once, when the entry is given as invalid.
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*/
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if (!entry->valid) {
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err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
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if (err)
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return err;
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}
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err = mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_GET_NEXT);
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if (err)
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return err;
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return mv88e6xxx_g1_vtu_vid_read(chip, entry);
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}
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int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 val;
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int err;
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err = mv88e6xxx_g1_vtu_getnext(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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err = mv88e6185_g1_vtu_data_read(chip, entry);
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if (err)
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return err;
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/* VTU DBNum[3:0] are located in VTU Operation 3:0
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* VTU DBNum[7:4] are located in VTU Operation 11:8
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*/
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err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val);
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if (err)
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return err;
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entry->fid = val & 0x000f;
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entry->fid |= (val & 0x0f00) >> 4;
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}
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return 0;
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}
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int mv88e6352_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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/* Fetch VLAN MemberTag data from the VTU */
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err = mv88e6xxx_g1_vtu_getnext(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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/* Fetch (and mask) VLAN PortState data from the STU */
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err = mv88e6xxx_g1_vtu_stu_get(chip, entry);
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if (err)
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return err;
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err = mv88e6185_g1_vtu_data_read(chip, entry);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_fid_read(chip, entry);
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if (err)
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return err;
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}
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return 0;
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}
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int mv88e6390_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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/* Fetch VLAN MemberTag data from the VTU */
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err = mv88e6xxx_g1_vtu_getnext(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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err = mv88e6390_g1_vtu_data_read(chip, entry->member);
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if (err)
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return err;
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/* Fetch VLAN PortState data from the STU */
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err = mv88e6xxx_g1_vtu_stu_get(chip, entry);
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if (err)
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return err;
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err = mv88e6390_g1_vtu_data_read(chip, entry->state);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_fid_read(chip, entry);
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if (err)
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return err;
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}
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return 0;
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}
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int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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u16 op = MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE;
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int err;
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err = mv88e6xxx_g1_vtu_op_wait(chip);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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err = mv88e6185_g1_vtu_data_write(chip, entry);
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if (err)
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return err;
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/* VTU DBNum[3:0] are located in VTU Operation 3:0
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* VTU DBNum[7:4] are located in VTU Operation 11:8
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*/
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op |= entry->fid & 0x000f;
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op |= (entry->fid & 0x00f0) << 8;
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}
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return mv88e6xxx_g1_vtu_op(chip, op);
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}
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int mv88e6352_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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err = mv88e6xxx_g1_vtu_op_wait(chip);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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/* Write MemberTag and PortState data */
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err = mv88e6185_g1_vtu_data_write(chip, entry);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_sid_write(chip, entry);
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if (err)
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return err;
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/* Load STU entry */
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err = mv88e6xxx_g1_vtu_op(chip,
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MV88E6XXX_G1_VTU_OP_STU_LOAD_PURGE);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_fid_write(chip, entry);
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if (err)
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return err;
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}
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/* Load/Purge VTU entry */
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return mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE);
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}
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int mv88e6390_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
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struct mv88e6xxx_vtu_entry *entry)
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{
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int err;
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err = mv88e6xxx_g1_vtu_op_wait(chip);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_vid_write(chip, entry);
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if (err)
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return err;
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if (entry->valid) {
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/* Write PortState data */
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err = mv88e6390_g1_vtu_data_write(chip, entry->state);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_sid_write(chip, entry);
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if (err)
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return err;
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/* Load STU entry */
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err = mv88e6xxx_g1_vtu_op(chip,
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MV88E6XXX_G1_VTU_OP_STU_LOAD_PURGE);
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if (err)
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return err;
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/* Write MemberTag data */
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err = mv88e6390_g1_vtu_data_write(chip, entry->member);
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if (err)
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return err;
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err = mv88e6xxx_g1_vtu_fid_write(chip, entry);
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if (err)
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return err;
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}
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/* Load/Purge VTU entry */
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return mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE);
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}
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int mv88e6xxx_g1_vtu_flush(struct mv88e6xxx_chip *chip)
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{
|
|
int err;
|
|
|
|
err = mv88e6xxx_g1_vtu_op_wait(chip);
|
|
if (err)
|
|
return err;
|
|
|
|
return mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_FLUSH_ALL);
|
|
}
|