| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Marvell 88E6xxx VLAN [Spanning Tree] Translation Unit (VTU [STU]) support |
| * |
| * Copyright (c) 2008 Marvell Semiconductor |
| * Copyright (c) 2015 CMC Electronics, Inc. |
| * Copyright (c) 2017 Savoir-faire Linux, Inc. |
| */ |
| |
| #include <linux/bitfield.h> |
| #include <linux/interrupt.h> |
| #include <linux/irqdomain.h> |
| |
| #include "chip.h" |
| #include "global1.h" |
| |
| /* Offset 0x02: VTU FID Register */ |
| |
| static int mv88e6xxx_g1_vtu_fid_read(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val; |
| int err; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_FID, &val); |
| if (err) |
| return err; |
| |
| entry->fid = val & MV88E6352_G1_VTU_FID_MASK; |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g1_vtu_fid_write(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val = entry->fid & MV88E6352_G1_VTU_FID_MASK; |
| |
| return mv88e6xxx_g1_write(chip, MV88E6352_G1_VTU_FID, val); |
| } |
| |
| /* Offset 0x03: VTU SID Register */ |
| |
| static int mv88e6xxx_g1_vtu_sid_read(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val; |
| int err; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_SID, &val); |
| if (err) |
| return err; |
| |
| entry->sid = val & MV88E6352_G1_VTU_SID_MASK; |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g1_vtu_sid_write(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val = entry->sid & MV88E6352_G1_VTU_SID_MASK; |
| |
| return mv88e6xxx_g1_write(chip, MV88E6352_G1_VTU_SID, val); |
| } |
| |
| /* Offset 0x05: VTU Operation Register */ |
| |
| static int mv88e6xxx_g1_vtu_op_wait(struct mv88e6xxx_chip *chip) |
| { |
| int bit = __bf_shf(MV88E6XXX_G1_VTU_OP_BUSY); |
| |
| return mv88e6xxx_g1_wait_bit(chip, MV88E6XXX_G1_VTU_OP, bit, 0); |
| } |
| |
| static int mv88e6xxx_g1_vtu_op(struct mv88e6xxx_chip *chip, u16 op) |
| { |
| int err; |
| |
| err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_OP, |
| MV88E6XXX_G1_VTU_OP_BUSY | op); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g1_vtu_op_wait(chip); |
| } |
| |
| /* Offset 0x06: VTU VID Register */ |
| |
| static int mv88e6xxx_g1_vtu_vid_read(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val; |
| int err; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_VID, &val); |
| if (err) |
| return err; |
| |
| entry->vid = val & 0xfff; |
| |
| if (val & MV88E6390_G1_VTU_VID_PAGE) |
| entry->vid |= 0x1000; |
| |
| entry->valid = !!(val & MV88E6XXX_G1_VTU_VID_VALID); |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g1_vtu_vid_write(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val = entry->vid & 0xfff; |
| |
| if (entry->vid & 0x1000) |
| val |= MV88E6390_G1_VTU_VID_PAGE; |
| |
| if (entry->valid) |
| val |= MV88E6XXX_G1_VTU_VID_VALID; |
| |
| return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_VID, val); |
| } |
| |
| /* Offset 0x07: VTU/STU Data Register 1 |
| * Offset 0x08: VTU/STU Data Register 2 |
| * Offset 0x09: VTU/STU Data Register 3 |
| */ |
| |
| static int mv88e6185_g1_vtu_data_read(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 regs[3]; |
| int i; |
| |
| /* Read all 3 VTU/STU Data registers */ |
| for (i = 0; i < 3; ++i) { |
| u16 *reg = ®s[i]; |
| int err; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg); |
| if (err) |
| return err; |
| } |
| |
| /* Extract MemberTag and PortState data */ |
| for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) { |
| unsigned int member_offset = (i % 4) * 4; |
| unsigned int state_offset = member_offset + 2; |
| |
| entry->member[i] = (regs[i / 4] >> member_offset) & 0x3; |
| entry->state[i] = (regs[i / 4] >> state_offset) & 0x3; |
| } |
| |
| return 0; |
| } |
| |
| static int mv88e6185_g1_vtu_data_write(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 regs[3] = { 0 }; |
| int i; |
| |
| /* Insert MemberTag and PortState data */ |
| for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) { |
| unsigned int member_offset = (i % 4) * 4; |
| unsigned int state_offset = member_offset + 2; |
| |
| regs[i / 4] |= (entry->member[i] & 0x3) << member_offset; |
| regs[i / 4] |= (entry->state[i] & 0x3) << state_offset; |
| } |
| |
| /* Write all 3 VTU/STU Data registers */ |
| for (i = 0; i < 3; ++i) { |
| u16 reg = regs[i]; |
| int err; |
| |
| err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int mv88e6390_g1_vtu_data_read(struct mv88e6xxx_chip *chip, u8 *data) |
| { |
| u16 regs[2]; |
| int i; |
| |
| /* Read the 2 VTU/STU Data registers */ |
| for (i = 0; i < 2; ++i) { |
| u16 *reg = ®s[i]; |
| int err; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg); |
| if (err) |
| return err; |
| } |
| |
| /* Extract data */ |
| for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) { |
| unsigned int offset = (i % 8) * 2; |
| |
| data[i] = (regs[i / 8] >> offset) & 0x3; |
| } |
| |
| return 0; |
| } |
| |
| static int mv88e6390_g1_vtu_data_write(struct mv88e6xxx_chip *chip, u8 *data) |
| { |
| u16 regs[2] = { 0 }; |
| int i; |
| |
| /* Insert data */ |
| for (i = 0; i < mv88e6xxx_num_ports(chip); ++i) { |
| unsigned int offset = (i % 8) * 2; |
| |
| regs[i / 8] |= (data[i] & 0x3) << offset; |
| } |
| |
| /* Write the 2 VTU/STU Data registers */ |
| for (i = 0; i < 2; ++i) { |
| u16 reg = regs[i]; |
| int err; |
| |
| err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_VTU_DATA1 + i, reg); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| /* VLAN Translation Unit Operations */ |
| |
| static int mv88e6xxx_g1_vtu_stu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_sid_write(chip, entry); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_STU_GET_NEXT); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_sid_read(chip, entry); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g1_vtu_vid_read(chip, entry); |
| } |
| |
| static int mv88e6xxx_g1_vtu_stu_get(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *vtu) |
| { |
| struct mv88e6xxx_vtu_entry stu; |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_sid_read(chip, vtu); |
| if (err) |
| return err; |
| |
| stu.sid = vtu->sid - 1; |
| |
| err = mv88e6xxx_g1_vtu_stu_getnext(chip, &stu); |
| if (err) |
| return err; |
| |
| if (stu.sid != vtu->sid || !stu.valid) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_op_wait(chip); |
| if (err) |
| return err; |
| |
| /* To get the next higher active VID, the VTU GetNext operation can be |
| * started again without setting the VID registers since it already |
| * contains the last VID. |
| * |
| * To save a few hardware accesses and abstract this to the caller, |
| * write the VID only once, when the entry is given as invalid. |
| */ |
| if (!entry->valid) { |
| err = mv88e6xxx_g1_vtu_vid_write(chip, entry); |
| if (err) |
| return err; |
| } |
| |
| err = mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_GET_NEXT); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g1_vtu_vid_read(chip, entry); |
| } |
| |
| int mv88e6250_g1_vtu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val; |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_getnext(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| err = mv88e6185_g1_vtu_data_read(chip, entry); |
| if (err) |
| return err; |
| |
| /* VTU DBNum[3:0] are located in VTU Operation 3:0 |
| * VTU DBNum[5:4] are located in VTU Operation 9:8 |
| */ |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val); |
| if (err) |
| return err; |
| |
| entry->fid = val & 0x000f; |
| entry->fid |= (val & 0x0300) >> 4; |
| } |
| |
| return 0; |
| } |
| |
| int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 val; |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_getnext(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| err = mv88e6185_g1_vtu_data_read(chip, entry); |
| if (err) |
| return err; |
| |
| /* VTU DBNum[3:0] are located in VTU Operation 3:0 |
| * VTU DBNum[7:4] are located in VTU Operation 11:8 |
| */ |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val); |
| if (err) |
| return err; |
| |
| entry->fid = val & 0x000f; |
| entry->fid |= (val & 0x0f00) >> 4; |
| } |
| |
| return 0; |
| } |
| |
| int mv88e6352_g1_vtu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| /* Fetch VLAN MemberTag data from the VTU */ |
| err = mv88e6xxx_g1_vtu_getnext(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| /* Fetch (and mask) VLAN PortState data from the STU */ |
| err = mv88e6xxx_g1_vtu_stu_get(chip, entry); |
| if (err) |
| return err; |
| |
| err = mv88e6185_g1_vtu_data_read(chip, entry); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_fid_read(chip, entry); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| int mv88e6390_g1_vtu_getnext(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| /* Fetch VLAN MemberTag data from the VTU */ |
| err = mv88e6xxx_g1_vtu_getnext(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| err = mv88e6390_g1_vtu_data_read(chip, entry->member); |
| if (err) |
| return err; |
| |
| /* Fetch VLAN PortState data from the STU */ |
| err = mv88e6xxx_g1_vtu_stu_get(chip, entry); |
| if (err) |
| return err; |
| |
| err = mv88e6390_g1_vtu_data_read(chip, entry->state); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_fid_read(chip, entry); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| int mv88e6250_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 op = MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE; |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_op_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_vid_write(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| err = mv88e6185_g1_vtu_data_write(chip, entry); |
| if (err) |
| return err; |
| |
| /* VTU DBNum[3:0] are located in VTU Operation 3:0 |
| * VTU DBNum[5:4] are located in VTU Operation 9:8 |
| */ |
| op |= entry->fid & 0x000f; |
| op |= (entry->fid & 0x0030) << 4; |
| } |
| |
| return mv88e6xxx_g1_vtu_op(chip, op); |
| } |
| |
| int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| u16 op = MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE; |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_op_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_vid_write(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| err = mv88e6185_g1_vtu_data_write(chip, entry); |
| if (err) |
| return err; |
| |
| /* VTU DBNum[3:0] are located in VTU Operation 3:0 |
| * VTU DBNum[7:4] are located in VTU Operation 11:8 |
| */ |
| op |= entry->fid & 0x000f; |
| op |= (entry->fid & 0x00f0) << 4; |
| } |
| |
| return mv88e6xxx_g1_vtu_op(chip, op); |
| } |
| |
| int mv88e6352_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_op_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_vid_write(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| /* Write MemberTag and PortState data */ |
| err = mv88e6185_g1_vtu_data_write(chip, entry); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_sid_write(chip, entry); |
| if (err) |
| return err; |
| |
| /* Load STU entry */ |
| err = mv88e6xxx_g1_vtu_op(chip, |
| MV88E6XXX_G1_VTU_OP_STU_LOAD_PURGE); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_fid_write(chip, entry); |
| if (err) |
| return err; |
| } |
| |
| /* Load/Purge VTU entry */ |
| return mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE); |
| } |
| |
| int mv88e6390_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip, |
| struct mv88e6xxx_vtu_entry *entry) |
| { |
| int err; |
| |
| err = mv88e6xxx_g1_vtu_op_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_vid_write(chip, entry); |
| if (err) |
| return err; |
| |
| if (entry->valid) { |
| /* Write PortState data */ |
| err = mv88e6390_g1_vtu_data_write(chip, entry->state); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_sid_write(chip, entry); |
| if (err) |
| return err; |
| |
| /* Load STU entry */ |
| err = mv88e6xxx_g1_vtu_op(chip, |
| MV88E6XXX_G1_VTU_OP_STU_LOAD_PURGE); |
| if (err) |
| return err; |
| |
| /* Write MemberTag data */ |
| err = mv88e6390_g1_vtu_data_write(chip, entry->member); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g1_vtu_fid_write(chip, entry); |
| if (err) |
| return err; |
| } |
| |
| /* Load/Purge VTU entry */ |
| return mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_VTU_LOAD_PURGE); |
| } |
| |
| int mv88e6xxx_g1_vtu_flush(struct mv88e6xxx_chip *chip) |
| { |
| 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); |
| } |
| |
| static irqreturn_t mv88e6xxx_g1_vtu_prob_irq_thread_fn(int irq, void *dev_id) |
| { |
| struct mv88e6xxx_chip *chip = dev_id; |
| struct mv88e6xxx_vtu_entry entry; |
| int spid; |
| int err; |
| u16 val; |
| |
| mv88e6xxx_reg_lock(chip); |
| |
| err = mv88e6xxx_g1_vtu_op(chip, MV88E6XXX_G1_VTU_OP_GET_CLR_VIOLATION); |
| if (err) |
| goto out; |
| |
| err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP, &val); |
| if (err) |
| goto out; |
| |
| err = mv88e6xxx_g1_vtu_vid_read(chip, &entry); |
| if (err) |
| goto out; |
| |
| spid = val & MV88E6XXX_G1_VTU_OP_SPID_MASK; |
| |
| if (val & MV88E6XXX_G1_VTU_OP_MEMBER_VIOLATION) { |
| dev_err_ratelimited(chip->dev, "VTU member violation for vid %d, source port %d\n", |
| entry.vid, spid); |
| chip->ports[spid].vtu_member_violation++; |
| } |
| |
| if (val & MV88E6XXX_G1_VTU_OP_MISS_VIOLATION) { |
| dev_dbg_ratelimited(chip->dev, "VTU miss violation for vid %d, source port %d\n", |
| entry.vid, spid); |
| chip->ports[spid].vtu_miss_violation++; |
| } |
| |
| mv88e6xxx_reg_unlock(chip); |
| |
| return IRQ_HANDLED; |
| |
| out: |
| mv88e6xxx_reg_unlock(chip); |
| |
| dev_err(chip->dev, "VTU problem: error %d while handling interrupt\n", |
| err); |
| |
| return IRQ_HANDLED; |
| } |
| |
| int mv88e6xxx_g1_vtu_prob_irq_setup(struct mv88e6xxx_chip *chip) |
| { |
| int err; |
| |
| chip->vtu_prob_irq = irq_find_mapping(chip->g1_irq.domain, |
| MV88E6XXX_G1_STS_IRQ_VTU_PROB); |
| if (chip->vtu_prob_irq < 0) |
| return chip->vtu_prob_irq; |
| |
| snprintf(chip->vtu_prob_irq_name, sizeof(chip->vtu_prob_irq_name), |
| "mv88e6xxx-%s-g1-vtu-prob", dev_name(chip->dev)); |
| |
| err = request_threaded_irq(chip->vtu_prob_irq, NULL, |
| mv88e6xxx_g1_vtu_prob_irq_thread_fn, |
| IRQF_ONESHOT, chip->vtu_prob_irq_name, |
| chip); |
| if (err) |
| irq_dispose_mapping(chip->vtu_prob_irq); |
| |
| return err; |
| } |
| |
| void mv88e6xxx_g1_vtu_prob_irq_free(struct mv88e6xxx_chip *chip) |
| { |
| free_irq(chip->vtu_prob_irq, chip); |
| irq_dispose_mapping(chip->vtu_prob_irq); |
| } |
