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
  53 struct bcm_sf2_cfp_priv {
  54         /* Mutex protecting concurrent accesses to the CFP registers */
  55         struct mutex lock;
  56         DECLARE_BITMAP(used, CFP_NUM_RULES);
  57         DECLARE_BITMAP(unique, CFP_NUM_RULES);
  58         unsigned int rules_cnt;
  59 };
  60
  61 struct bcm_sf2_priv {
  62         /* Base registers, keep those in order with BCM_SF2_REGS_NAME */
  63         void __iomem                    *core;
  64         void __iomem                    *reg;
  65         void __iomem                    *intrl2_0;
  66         void __iomem                    *intrl2_1;
  67         void __iomem                    *fcb;
  68         void __iomem                    *acb;
  69
  70         /* Register offsets indirection tables */
  71         u32                             type;
  72         const u16                       *reg_offsets;
  73         unsigned int                    core_reg_align;
  74         unsigned int                    num_cfp_rules;
  75
  76         /* spinlock protecting access to the indirect registers */
  77         spinlock_t                      indir_lock;
  78
  79         int                             irq0;
  80         int                             irq1;
  81         u32                             irq0_stat;
  82         u32                             irq0_mask;
  83         u32                             irq1_stat;
  84         u32                             irq1_mask;
  85
  86         /* Backing b53_device */
  87         struct b53_device               *dev;
  88
  89         /* Mutex protecting access to the MIB counters */
  90         struct mutex                    stats_mutex;
  91
  92         struct bcm_sf2_hw_params        hw_params;
  93
  94         struct bcm_sf2_port_status      port_sts[DSA_MAX_PORTS];
  95
  96         /* Mask of ports enabled for Wake-on-LAN */
  97         u32                             wol_ports_mask;
  98
  99         /* MoCA port location */
 100         int                             moca_port;
 101
 102         /* Bitmask of ports having an integrated PHY */
 103         unsigned int                    int_phy_mask;
 104
 105         /* Master and slave MDIO bus controller */
 106         unsigned int                    indir_phy_mask;
 107         struct device_node              *master_mii_dn;
 108         struct mii_bus                  *slave_mii_bus;
 109         struct mii_bus                  *master_mii_bus;
 110
 111         /* Bitmask of ports needing BRCM tags */
 112         unsigned int                    brcm_tag_mask;
 113
 114         /* CFP rules context */
 115         struct bcm_sf2_cfp_priv         cfp;
 116 };
 117
 118 static inline struct bcm_sf2_priv *bcm_sf2_to_priv(struct dsa_switch *ds)
 119 {
 120         struct b53_device *dev = ds->priv;
 121
 122         return dev->priv;
 123 }
 124
 125 static inline u32 bcm_sf2_mangle_addr(struct bcm_sf2_priv *priv, u32 off)
 126 {
 127         return off << priv->core_reg_align;
 128 }
 129
 130 #define SF2_IO_MACRO(name) \
 131 static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off)      \
 132 {                                                                       \
 133         return readl_relaxed(priv->name + off);                         \
 134 }                                                                       \
 135 static inline void name##_writel(struct bcm_sf2_priv *priv,             \
 136                                   u32 val, u32 off)                     \
 137 {                                                                       \
 138         writel_relaxed(val, priv->name + off);                          \
 139 }                                                                       \
 140
 141 /* Accesses to 64-bits register requires us to latch the hi/lo pairs
 142  * using the REG_DIR_DATA_{READ,WRITE} ancillary registers. The 'indir_lock'
 143  * spinlock is automatically grabbed and released to provide relative
 144  * atomiticy with latched reads/writes.
 145  */
 146 #define SF2_IO64_MACRO(name) \
 147 static inline u64 name##_readq(struct bcm_sf2_priv *priv, u32 off)      \
 148 {                                                                       \
 149         u32 indir, dir;                                                 \
 150         spin_lock(&priv->indir_lock);                                   \
 151         dir = name##_readl(priv, off);                                  \
 152         indir = reg_readl(priv, REG_DIR_DATA_READ);                     \
 153         spin_unlock(&priv->indir_lock);                                 \
 154         return (u64)indir << 32 | dir;                                  \
 155 }                                                                       \
 156 static inline void name##_writeq(struct bcm_sf2_priv *priv, u64 val,    \
 157                                                         u32 off)        \
 158 {                                                                       \
 159         spin_lock(&priv->indir_lock);                                   \
 160         reg_writel(priv, upper_32_bits(val), REG_DIR_DATA_WRITE);       \
 161         name##_writel(priv, lower_32_bits(val), off);                   \
 162         spin_unlock(&priv->indir_lock);                                 \
 163 }
 164
 165 #define SWITCH_INTR_L2(which)                                           \
 166 static inline void intrl2_##which##_mask_clear(struct bcm_sf2_priv *priv, \
 167                                                 u32 mask)               \
 168 {                                                                       \
 169         priv->irq##which##_mask &= ~(mask);                             \
 170         intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);     \
 171 }                                                                       \
 172 static inline void intrl2_##which##_mask_set(struct bcm_sf2_priv *priv, \
 173                                                 u32 mask)               \
 174 {                                                                       \
 175         intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);      \
 176         priv->irq##which##_mask |= (mask);                              \
 177 }                                                                       \
 178
 179 static inline u32 core_readl(struct bcm_sf2_priv *priv, u32 off)
 180 {
 181         u32 tmp = bcm_sf2_mangle_addr(priv, off);
 182         return readl_relaxed(priv->core + tmp);
 183 }
 184
 185 static inline void core_writel(struct bcm_sf2_priv *priv, u32 val, u32 off)
 186 {
 187         u32 tmp = bcm_sf2_mangle_addr(priv, off);
 188         writel_relaxed(val, priv->core + tmp);
 189 }
 190
 191 static inline u32 reg_readl(struct bcm_sf2_priv *priv, u16 off)
 192 {
 193         return readl_relaxed(priv->reg + priv->reg_offsets[off]);
 194 }
 195
 196 static inline void reg_writel(struct bcm_sf2_priv *priv, u32 val, u16 off)
 197 {
 198         writel_relaxed(val, priv->reg + priv->reg_offsets[off]);
 199 }
 200
 201 SF2_IO64_MACRO(core);
 202 SF2_IO_MACRO(intrl2_0);
 203 SF2_IO_MACRO(intrl2_1);
 204 SF2_IO_MACRO(fcb);
 205 SF2_IO_MACRO(acb);
 206
 207 SWITCH_INTR_L2(0);
 208 SWITCH_INTR_L2(1);
 209
 210 /* RXNFC */
 211 int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
 212                       struct ethtool_rxnfc *nfc, u32 *rule_locs);
 213 int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
 214                       struct ethtool_rxnfc *nfc);
 215 int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv);
 216
 217 #endif /* __BCM_SF2_H */