drivers/net/dsa/bcm_sf2.h

   1 /*
   2  * Broadcom Starfighter2 private context
   3  *
   4  * Copyright (C) 2014, Broadcom Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #ifndef __BCM_SF2_H
  13 #define __BCM_SF2_H
  14
  15 #include <linux/platform_device.h>
  16 #include <linux/kernel.h>
  17 #include <linux/io.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/mutex.h>
  20 #include <linux/mii.h>
  21 #include <linux/ethtool.h>
  22 #include <linux/types.h>
  23 #include <linux/bitops.h>
  24 #include <linux/if_vlan.h>
  25
  26 #include <net/dsa.h>
  27
  28 #include "bcm_sf2_regs.h"
  29 #include "b53/b53_priv.h"
  30
  31 struct bcm_sf2_hw_params {
  32         u16     top_rev;
  33         u16     core_rev;
  34         u16     gphy_rev;
  35         u32     num_gphy;
  36         u8      num_acb_queue;
  37         u8      num_rgmii;
  38         u8      num_ports;
  39         u8      fcb_pause_override:1;
  40         u8      acb_packets_inflight:1;
  41 };
  42
  43 #define BCM_SF2_REGS_NAME {\
  44         "core", "reg", "intrl2_0", "intrl2_1", "fcb", "acb" \
  45 }
  46
  47 #define BCM_SF2_REGS_NUM        6
  48
  49 struct bcm_sf2_port_status {
  50         unsigned int link;
  51
  52         struct ethtool_eee eee;
  53 };
  54
  55 struct bcm_sf2_cfp_priv {
  56         /* Mutex protecting concurrent accesses to the CFP registers */
  57         struct mutex lock;
  58         DECLARE_BITMAP(used, CFP_NUM_RULES);
  59         unsigned int rules_cnt;
  60 };
  61
  62 struct bcm_sf2_priv {
  63         /* Base registers, keep those in order with BCM_SF2_REGS_NAME */
  64         void __iomem                    *core;
  65         void __iomem                    *reg;
  66         void __iomem                    *intrl2_0;
  67         void __iomem                    *intrl2_1;
  68         void __iomem                    *fcb;
  69         void __iomem                    *acb;
  70
  71         /* Register offsets indirection tables */
  72         u32                             type;
  73         const u16                       *reg_offsets;
  74         unsigned int                    core_reg_align;
  75         unsigned int                    num_cfp_rules;
  76
  77         /* spinlock protecting access to the indirect registers */
  78         spinlock_t                      indir_lock;
  79
  80         int                             irq0;
  81         int                             irq1;
  82         u32                             irq0_stat;
  83         u32                             irq0_mask;
  84         u32                             irq1_stat;
  85         u32                             irq1_mask;
  86
  87         /* Backing b53_device */
  88         struct b53_device               *dev;
  89
  90         /* Mutex protecting access to the MIB counters */
  91         struct mutex                    stats_mutex;
  92
  93         struct bcm_sf2_hw_params        hw_params;
  94
  95         struct bcm_sf2_port_status      port_sts[DSA_MAX_PORTS];
  96
  97         /* Mask of ports enabled for Wake-on-LAN */
  98         u32                             wol_ports_mask;
  99
 100         /* MoCA port location */
 101         int                             moca_port;
 102
 103         /* Bitmask of ports having an integrated PHY */
 104         unsigned int                    int_phy_mask;
 105
 106         /* Master and slave MDIO bus controller */
 107         unsigned int                    indir_phy_mask;
 108         struct device_node              *master_mii_dn;
 109         struct mii_bus                  *slave_mii_bus;
 110         struct mii_bus                  *master_mii_bus;
 111
 112         /* Bitmask of ports needing BRCM tags */
 113         unsigned int                    brcm_tag_mask;
 114
 115         /* CFP rules context */
 116         struct bcm_sf2_cfp_priv         cfp;
 117 };
 118
 119 static inline struct bcm_sf2_priv *bcm_sf2_to_priv(struct dsa_switch *ds)
 120 {
 121         struct b53_device *dev = ds->priv;
 122
 123         return dev->priv;
 124 }
 125
 126 static inline u32 bcm_sf2_mangle_addr(struct bcm_sf2_priv *priv, u32 off)
 127 {
 128         return off << priv->core_reg_align;
 129 }
 130
 131 #define SF2_IO_MACRO(name) \
 132 static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off)      \
 133 {                                                                       \
 134         return readl_relaxed(priv->name + off);                         \
 135 }                                                                       \
 136 static inline void name##_writel(struct bcm_sf2_priv *priv,             \
 137                                   u32 val, u32 off)                     \
 138 {                                                                       \
 139         writel_relaxed(val, priv->name + off);                          \
 140 }                                                                       \
 141
 142 /* Accesses to 64-bits register requires us to latch the hi/lo pairs
 143  * using the REG_DIR_DATA_{READ,WRITE} ancillary registers. The 'indir_lock'
 144  * spinlock is automatically grabbed and released to provide relative
 145  * atomiticy with latched reads/writes.
 146  */
 147 #define SF2_IO64_MACRO(name) \
 148 static inline u64 name##_readq(struct bcm_sf2_priv *priv, u32 off)      \
 149 {                                                                       \
 150         u32 indir, dir;                                                 \
 151         spin_lock(&priv->indir_lock);                                   \
 152         dir = name##_readl(priv, off);                                  \
 153         indir = reg_readl(priv, REG_DIR_DATA_READ);                     \
 154         spin_unlock(&priv->indir_lock);                                 \
 155         return (u64)indir << 32 | dir;                                  \
 156 }                                                                       \
 157 static inline void name##_writeq(struct bcm_sf2_priv *priv, u64 val,    \
 158                                                         u32 off)        \
 159 {                                                                       \
 160         spin_lock(&priv->indir_lock);                                   \
 161         reg_writel(priv, upper_32_bits(val), REG_DIR_DATA_WRITE);       \
 162         name##_writel(priv, lower_32_bits(val), off);                   \
 163         spin_unlock(&priv->indir_lock);                                 \
 164 }
 165
 166 #define SWITCH_INTR_L2(which)                                           \
 167 static inline void intrl2_##which##_mask_clear(struct bcm_sf2_priv *priv, \
 168                                                 u32 mask)               \
 169 {                                                                       \
 170         priv->irq##which##_mask &= ~(mask);                             \
 171         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
 172 }                                                                       \
 173 static inline void intrl2_##which##_mask_set(struct bcm_sf2_priv *priv, \
 174                                                 u32 mask)               \
 175 {                                                                       \
 176         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
 177         priv->irq##which##_mask |= (mask);                              \
 178 }                                                                       \
 179
 180 static inline u32 core_readl(struct bcm_sf2_priv *priv, u32 off)
 181 {
 182         u32 tmp = bcm_sf2_mangle_addr(priv, off);
 183         return readl_relaxed(priv->core + tmp);
 184 }
 185
 186 static inline void core_writel(struct bcm_sf2_priv *priv, u32 val, u32 off)
 187 {
 188         u32 tmp = bcm_sf2_mangle_addr(priv, off);
 189         writel_relaxed(val, priv->core + tmp);
 190 }
 191
 192 static inline u32 reg_readl(struct bcm_sf2_priv *priv, u16 off)
 193 {
 194         return readl_relaxed(priv->reg + priv->reg_offsets[off]);
 195 }
 196
 197 static inline void reg_writel(struct bcm_sf2_priv *priv, u32 val, u16 off)
 198 {
 199         writel_relaxed(val, priv->reg + priv->reg_offsets[off]);
 200 }
 201
 202 SF2_IO64_MACRO(core);
 203 SF2_IO_MACRO(intrl2_0);
 204 SF2_IO_MACRO(intrl2_1);
 205 SF2_IO_MACRO(fcb);
 206 SF2_IO_MACRO(acb);
 207
 208 SWITCH_INTR_L2(0);
 209 SWITCH_INTR_L2(1);
 210
 211 /* RXNFC */
 212 int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
 213                       struct ethtool_rxnfc *nfc, u32 *rule_locs);
 214 int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
 215                       struct ethtool_rxnfc *nfc);
 216 int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv);
 217
 218 #endif /* __BCM_SF2_H */