xref: /openbmc/linux/drivers/net/dsa/bcm_sf2.h (revision 55fd7e02)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Broadcom Starfighter2 private context
4  *
5  * Copyright (C) 2014, Broadcom Corporation
6  */
7 
8 #ifndef __BCM_SF2_H
9 #define __BCM_SF2_H
10 
11 #include <linux/platform_device.h>
12 #include <linux/kernel.h>
13 #include <linux/io.h>
14 #include <linux/spinlock.h>
15 #include <linux/mutex.h>
16 #include <linux/mii.h>
17 #include <linux/ethtool.h>
18 #include <linux/types.h>
19 #include <linux/bitops.h>
20 #include <linux/if_vlan.h>
21 #include <linux/reset.h>
22 
23 #include <net/dsa.h>
24 
25 #include "bcm_sf2_regs.h"
26 #include "b53/b53_priv.h"
27 
28 struct bcm_sf2_hw_params {
29 	u16	top_rev;
30 	u16	core_rev;
31 	u16	gphy_rev;
32 	u32	num_gphy;
33 	u8	num_acb_queue;
34 	u8	num_rgmii;
35 	u8	num_ports;
36 	u8	fcb_pause_override:1;
37 	u8	acb_packets_inflight:1;
38 };
39 
40 #define BCM_SF2_REGS_NAME {\
41 	"core", "reg", "intrl2_0", "intrl2_1", "fcb", "acb" \
42 }
43 
44 #define BCM_SF2_REGS_NUM	6
45 
46 struct bcm_sf2_port_status {
47 	unsigned int link;
48 };
49 
50 struct bcm_sf2_cfp_priv {
51 	/* Mutex protecting concurrent accesses to the CFP registers */
52 	struct mutex lock;
53 	DECLARE_BITMAP(used, CFP_NUM_RULES);
54 	DECLARE_BITMAP(unique, CFP_NUM_RULES);
55 	unsigned int rules_cnt;
56 	struct list_head rules_list;
57 };
58 
59 struct bcm_sf2_priv {
60 	/* Base registers, keep those in order with BCM_SF2_REGS_NAME */
61 	void __iomem			*core;
62 	void __iomem			*reg;
63 	void __iomem			*intrl2_0;
64 	void __iomem			*intrl2_1;
65 	void __iomem			*fcb;
66 	void __iomem			*acb;
67 
68 	struct reset_control		*rcdev;
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 	struct bcm_sf2_hw_params	hw_params;
90 
91 	struct bcm_sf2_port_status	port_sts[DSA_MAX_PORTS];
92 
93 	/* Mask of ports enabled for Wake-on-LAN */
94 	u32				wol_ports_mask;
95 
96 	/* MoCA port location */
97 	int				moca_port;
98 
99 	/* Bitmask of ports having an integrated PHY */
100 	unsigned int			int_phy_mask;
101 
102 	/* Master and slave MDIO bus controller */
103 	unsigned int			indir_phy_mask;
104 	struct device_node		*master_mii_dn;
105 	struct mii_bus			*slave_mii_bus;
106 	struct mii_bus			*master_mii_bus;
107 
108 	/* Bitmask of ports needing BRCM tags */
109 	unsigned int			brcm_tag_mask;
110 
111 	/* CFP rules context */
112 	struct bcm_sf2_cfp_priv		cfp;
113 };
114 
115 static inline struct bcm_sf2_priv *bcm_sf2_to_priv(struct dsa_switch *ds)
116 {
117 	struct b53_device *dev = ds->priv;
118 
119 	return dev->priv;
120 }
121 
122 static inline u32 bcm_sf2_mangle_addr(struct bcm_sf2_priv *priv, u32 off)
123 {
124 	return off << priv->core_reg_align;
125 }
126 
127 #define SF2_IO_MACRO(name) \
128 static inline u32 name##_readl(struct bcm_sf2_priv *priv, u32 off)	\
129 {									\
130 	return readl_relaxed(priv->name + off);				\
131 }									\
132 static inline void name##_writel(struct bcm_sf2_priv *priv,		\
133 				  u32 val, u32 off)			\
134 {									\
135 	writel_relaxed(val, priv->name + off);				\
136 }									\
137 
138 /* Accesses to 64-bits register requires us to latch the hi/lo pairs
139  * using the REG_DIR_DATA_{READ,WRITE} ancillary registers. The 'indir_lock'
140  * spinlock is automatically grabbed and released to provide relative
141  * atomiticy with latched reads/writes.
142  */
143 #define SF2_IO64_MACRO(name) \
144 static inline u64 name##_readq(struct bcm_sf2_priv *priv, u32 off)	\
145 {									\
146 	u32 indir, dir;							\
147 	spin_lock(&priv->indir_lock);					\
148 	dir = name##_readl(priv, off);					\
149 	indir = reg_readl(priv, REG_DIR_DATA_READ);			\
150 	spin_unlock(&priv->indir_lock);					\
151 	return (u64)indir << 32 | dir;					\
152 }									\
153 static inline void name##_writeq(struct bcm_sf2_priv *priv, u64 val,	\
154 							u32 off)	\
155 {									\
156 	spin_lock(&priv->indir_lock);					\
157 	reg_writel(priv, upper_32_bits(val), REG_DIR_DATA_WRITE);	\
158 	name##_writel(priv, lower_32_bits(val), off);			\
159 	spin_unlock(&priv->indir_lock);					\
160 }
161 
162 #define SWITCH_INTR_L2(which)						\
163 static inline void intrl2_##which##_mask_clear(struct bcm_sf2_priv *priv, \
164 						u32 mask)		\
165 {									\
166 	priv->irq##which##_mask &= ~(mask);				\
167 	intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR);	\
168 }									\
169 static inline void intrl2_##which##_mask_set(struct bcm_sf2_priv *priv, \
170 						u32 mask)		\
171 {									\
172 	intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET);	\
173 	priv->irq##which##_mask |= (mask);				\
174 }									\
175 
176 static inline u32 core_readl(struct bcm_sf2_priv *priv, u32 off)
177 {
178 	u32 tmp = bcm_sf2_mangle_addr(priv, off);
179 	return readl_relaxed(priv->core + tmp);
180 }
181 
182 static inline void core_writel(struct bcm_sf2_priv *priv, u32 val, u32 off)
183 {
184 	u32 tmp = bcm_sf2_mangle_addr(priv, off);
185 	writel_relaxed(val, priv->core + tmp);
186 }
187 
188 static inline u32 reg_readl(struct bcm_sf2_priv *priv, u16 off)
189 {
190 	return readl_relaxed(priv->reg + priv->reg_offsets[off]);
191 }
192 
193 static inline void reg_writel(struct bcm_sf2_priv *priv, u32 val, u16 off)
194 {
195 	writel_relaxed(val, priv->reg + priv->reg_offsets[off]);
196 }
197 
198 SF2_IO64_MACRO(core);
199 SF2_IO_MACRO(intrl2_0);
200 SF2_IO_MACRO(intrl2_1);
201 SF2_IO_MACRO(fcb);
202 SF2_IO_MACRO(acb);
203 
204 SWITCH_INTR_L2(0);
205 SWITCH_INTR_L2(1);
206 
207 /* RXNFC */
208 int bcm_sf2_get_rxnfc(struct dsa_switch *ds, int port,
209 		      struct ethtool_rxnfc *nfc, u32 *rule_locs);
210 int bcm_sf2_set_rxnfc(struct dsa_switch *ds, int port,
211 		      struct ethtool_rxnfc *nfc);
212 int bcm_sf2_cfp_rst(struct bcm_sf2_priv *priv);
213 void bcm_sf2_cfp_exit(struct dsa_switch *ds);
214 int bcm_sf2_cfp_resume(struct dsa_switch *ds);
215 void bcm_sf2_cfp_get_strings(struct dsa_switch *ds, int port,
216 			     u32 stringset, uint8_t *data);
217 void bcm_sf2_cfp_get_ethtool_stats(struct dsa_switch *ds, int port,
218 				   uint64_t *data);
219 int bcm_sf2_cfp_get_sset_count(struct dsa_switch *ds, int port, int sset);
220 
221 #endif /* __BCM_SF2_H */
222