tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
25#include <net/dsa.h>
26
27#include "bcm_sf2_regs.h"
28
29struct bcm_sf2_hw_params {
30 u16 top_rev;
31 u16 core_rev;
32 u16 gphy_rev;
33 u32 num_gphy;
34 u8 num_acb_queue;
35 u8 num_rgmii;
36 u8 num_ports;
37 u8 fcb_pause_override:1;
38 u8 acb_packets_inflight:1;
39};
40
41#define BCM_SF2_REGS_NAME {\
42 "core", "reg", "intrl2_0", "intrl2_1", "fcb", "acb" \
43}
44
45#define BCM_SF2_REGS_NUM 6
46
47struct bcm_sf2_port_status {
48 unsigned int link;
49
50 struct ethtool_eee eee;
51
52 u32 vlan_ctl_mask;
53};
54
55struct bcm_sf2_arl_entry {
56 u8 port;
57 u8 mac[ETH_ALEN];
58 u16 vid;
59 u8 is_valid:1;
60 u8 is_age:1;
61 u8 is_static:1;
62};
63
64static inline void bcm_sf2_mac_from_u64(u64 src, u8 *dst)
65{
66 unsigned int i;
67
68 for (i = 0; i < ETH_ALEN; i++)
69 dst[ETH_ALEN - 1 - i] = (src >> (8 * i)) & 0xff;
70}
71
72static inline u64 bcm_sf2_mac_to_u64(const u8 *src)
73{
74 unsigned int i;
75 u64 dst = 0;
76
77 for (i = 0; i < ETH_ALEN; i++)
78 dst |= (u64)src[ETH_ALEN - 1 - i] << (8 * i);
79
80 return dst;
81}
82
83static inline void bcm_sf2_arl_to_entry(struct bcm_sf2_arl_entry *ent,
84 u64 mac_vid, u32 fwd_entry)
85{
86 memset(ent, 0, sizeof(*ent));
87 ent->port = fwd_entry & PORTID_MASK;
88 ent->is_valid = !!(fwd_entry & ARL_VALID);
89 ent->is_age = !!(fwd_entry & ARL_AGE);
90 ent->is_static = !!(fwd_entry & ARL_STATIC);
91 bcm_sf2_mac_from_u64(mac_vid, ent->mac);
92 ent->vid = mac_vid >> VID_SHIFT;
93}
94
95static inline void bcm_sf2_arl_from_entry(u64 *mac_vid, u32 *fwd_entry,
96 const struct bcm_sf2_arl_entry *ent)
97{
98 *mac_vid = bcm_sf2_mac_to_u64(ent->mac);
99 *mac_vid |= (u64)(ent->vid & VID_MASK) << VID_SHIFT;
100 *fwd_entry = ent->port & PORTID_MASK;
101 if (ent->is_valid)
102 *fwd_entry |= ARL_VALID;
103 if (ent->is_static)
104 *fwd_entry |= ARL_STATIC;
105 if (ent->is_age)
106 *fwd_entry |= ARL_AGE;
107}
108
109struct bcm_sf2_priv {
110 /* Base registers, keep those in order with BCM_SF2_REGS_NAME */
111 void __iomem *core;
112 void __iomem *reg;
113 void __iomem *intrl2_0;
114 void __iomem *intrl2_1;
115 void __iomem *fcb;
116 void __iomem *acb;
117
118 /* spinlock protecting access to the indirect registers */
119 spinlock_t indir_lock;
120
121 int irq0;
122 int irq1;
123 u32 irq0_stat;
124 u32 irq0_mask;
125 u32 irq1_stat;
126 u32 irq1_mask;
127
128 /* Mutex protecting access to the MIB counters */
129 struct mutex stats_mutex;
130
131 struct bcm_sf2_hw_params hw_params;
132
133 struct bcm_sf2_port_status port_sts[DSA_MAX_PORTS];
134
135 /* Mask of ports enabled for Wake-on-LAN */
136 u32 wol_ports_mask;
137
138 /* MoCA port location */
139 int moca_port;
140
141 /* Bitmask of ports having an integrated PHY */
142 unsigned int int_phy_mask;
143};
144
145struct bcm_sf2_hw_stats {
146 const char *string;
147 u16 reg;
148 u8 sizeof_stat;
149};
150
151#define SF2_IO_MACRO(name) \
152static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off) \
153{ \
154 return __raw_readl(priv->name + off); \
155} \
156static inline void name##_writel(struct bcm_sf2_priv *priv, \
157 u32 val, u32 off) \
158{ \
159 __raw_writel(val, priv->name + off); \
160} \
161
162/* Accesses to 64-bits register requires us to latch the hi/lo pairs
163 * using the REG_DIR_DATA_{READ,WRITE} ancillary registers. The 'indir_lock'
164 * spinlock is automatically grabbed and released to provide relative
165 * atomiticy with latched reads/writes.
166 */
167#define SF2_IO64_MACRO(name) \
168static inline u64 name##_readq(struct bcm_sf2_priv *priv, u32 off) \
169{ \
170 u32 indir, dir; \
171 spin_lock(&priv->indir_lock); \
172 dir = __raw_readl(priv->name + off); \
173 indir = reg_readl(priv, REG_DIR_DATA_READ); \
174 spin_unlock(&priv->indir_lock); \
175 return (u64)indir << 32 | dir; \
176} \
177static inline void name##_writeq(struct bcm_sf2_priv *priv, u64 val, \
178 u32 off) \
179{ \
180 spin_lock(&priv->indir_lock); \
181 reg_writel(priv, upper_32_bits(val), REG_DIR_DATA_WRITE); \
182 __raw_writel(lower_32_bits(val), priv->name + off); \
183 spin_unlock(&priv->indir_lock); \
184}
185
186#define SWITCH_INTR_L2(which) \
187static inline void intrl2_##which##_mask_clear(struct bcm_sf2_priv *priv, \
188 u32 mask) \
189{ \
190 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
191 priv->irq##which##_mask &= ~(mask); \
192} \
193static inline void intrl2_##which##_mask_set(struct bcm_sf2_priv *priv, \
194 u32 mask) \
195{ \
196 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
197 priv->irq##which##_mask |= (mask); \
198} \
199
200SF2_IO_MACRO(core);
201SF2_IO_MACRO(reg);
202SF2_IO64_MACRO(core);
203SF2_IO_MACRO(intrl2_0);
204SF2_IO_MACRO(intrl2_1);
205SF2_IO_MACRO(fcb);
206SF2_IO_MACRO(acb);
207
208SWITCH_INTR_L2(0);
209SWITCH_INTR_L2(1);
210
211#endif /* __BCM_SF2_H */