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 struct net_device *bridge_dev;
55};
56
57struct bcm_sf2_arl_entry {
58 u8 port;
59 u8 mac[ETH_ALEN];
60 u16 vid;
61 u8 is_valid:1;
62 u8 is_age:1;
63 u8 is_static:1;
64};
65
66static inline void bcm_sf2_mac_from_u64(u64 src, u8 *dst)
67{
68 unsigned int i;
69
70 for (i = 0; i < ETH_ALEN; i++)
71 dst[ETH_ALEN - 1 - i] = (src >> (8 * i)) & 0xff;
72}
73
74static inline u64 bcm_sf2_mac_to_u64(const u8 *src)
75{
76 unsigned int i;
77 u64 dst = 0;
78
79 for (i = 0; i < ETH_ALEN; i++)
80 dst |= (u64)src[ETH_ALEN - 1 - i] << (8 * i);
81
82 return dst;
83}
84
85static inline void bcm_sf2_arl_to_entry(struct bcm_sf2_arl_entry *ent,
86 u64 mac_vid, u32 fwd_entry)
87{
88 memset(ent, 0, sizeof(*ent));
89 ent->port = fwd_entry & PORTID_MASK;
90 ent->is_valid = !!(fwd_entry & ARL_VALID);
91 ent->is_age = !!(fwd_entry & ARL_AGE);
92 ent->is_static = !!(fwd_entry & ARL_STATIC);
93 bcm_sf2_mac_from_u64(mac_vid, ent->mac);
94 ent->vid = mac_vid >> VID_SHIFT;
95}
96
97static inline void bcm_sf2_arl_from_entry(u64 *mac_vid, u32 *fwd_entry,
98 const struct bcm_sf2_arl_entry *ent)
99{
100 *mac_vid = bcm_sf2_mac_to_u64(ent->mac);
101 *mac_vid |= (u64)(ent->vid & VID_MASK) << VID_SHIFT;
102 *fwd_entry = ent->port & PORTID_MASK;
103 if (ent->is_valid)
104 *fwd_entry |= ARL_VALID;
105 if (ent->is_static)
106 *fwd_entry |= ARL_STATIC;
107 if (ent->is_age)
108 *fwd_entry |= ARL_AGE;
109}
110
111struct bcm_sf2_priv {
112 /* Base registers, keep those in order with BCM_SF2_REGS_NAME */
113 void __iomem *core;
114 void __iomem *reg;
115 void __iomem *intrl2_0;
116 void __iomem *intrl2_1;
117 void __iomem *fcb;
118 void __iomem *acb;
119
120 /* spinlock protecting access to the indirect registers */
121 spinlock_t indir_lock;
122
123 int irq0;
124 int irq1;
125 u32 irq0_stat;
126 u32 irq0_mask;
127 u32 irq1_stat;
128 u32 irq1_mask;
129
130 /* Mutex protecting access to the MIB counters */
131 struct mutex stats_mutex;
132
133 struct bcm_sf2_hw_params hw_params;
134
135 struct bcm_sf2_port_status port_sts[DSA_MAX_PORTS];
136
137 /* Mask of ports enabled for Wake-on-LAN */
138 u32 wol_ports_mask;
139
140 /* MoCA port location */
141 int moca_port;
142
143 /* Bitmask of ports having an integrated PHY */
144 unsigned int int_phy_mask;
145};
146
147struct bcm_sf2_hw_stats {
148 const char *string;
149 u16 reg;
150 u8 sizeof_stat;
151};
152
153#define SF2_IO_MACRO(name) \
154static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off) \
155{ \
156 return __raw_readl(priv->name + off); \
157} \
158static inline void name##_writel(struct bcm_sf2_priv *priv, \
159 u32 val, u32 off) \
160{ \
161 __raw_writel(val, priv->name + off); \
162} \
163
164/* Accesses to 64-bits register requires us to latch the hi/lo pairs
165 * using the REG_DIR_DATA_{READ,WRITE} ancillary registers. The 'indir_lock'
166 * spinlock is automatically grabbed and released to provide relative
167 * atomiticy with latched reads/writes.
168 */
169#define SF2_IO64_MACRO(name) \
170static inline u64 name##_readq(struct bcm_sf2_priv *priv, u32 off) \
171{ \
172 u32 indir, dir; \
173 spin_lock(&priv->indir_lock); \
174 dir = __raw_readl(priv->name + off); \
175 indir = reg_readl(priv, REG_DIR_DATA_READ); \
176 spin_unlock(&priv->indir_lock); \
177 return (u64)indir << 32 | dir; \
178} \
179static inline void name##_writeq(struct bcm_sf2_priv *priv, u64 val, \
180 u32 off) \
181{ \
182 spin_lock(&priv->indir_lock); \
183 reg_writel(priv, upper_32_bits(val), REG_DIR_DATA_WRITE); \
184 __raw_writel(lower_32_bits(val), priv->name + off); \
185 spin_unlock(&priv->indir_lock); \
186}
187
188#define SWITCH_INTR_L2(which) \
189static inline void intrl2_##which##_mask_clear(struct bcm_sf2_priv *priv, \
190 u32 mask) \
191{ \
192 intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \
193 priv->irq##which##_mask &= ~(mask); \
194} \
195static inline void intrl2_##which##_mask_set(struct bcm_sf2_priv *priv, \
196 u32 mask) \
197{ \
198 intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \
199 priv->irq##which##_mask |= (mask); \
200} \
201
202SF2_IO_MACRO(core);
203SF2_IO_MACRO(reg);
204SF2_IO64_MACRO(core);
205SF2_IO_MACRO(intrl2_0);
206SF2_IO_MACRO(intrl2_1);
207SF2_IO_MACRO(fcb);
208SF2_IO_MACRO(acb);
209
210SWITCH_INTR_L2(0);
211SWITCH_INTR_L2(1);
212
213#endif /* __BCM_SF2_H */