1 /* 2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips 3 * Copyright (c) 2008-2009 Marvell Semiconductor 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #ifndef __LINUX_NET_DSA_H 12 #define __LINUX_NET_DSA_H 13 14 #include <linux/if_ether.h> 15 #include <linux/list.h> 16 #include <linux/timer.h> 17 #include <linux/workqueue.h> 18 #include <linux/of.h> 19 #include <linux/phy.h> 20 #include <linux/phy_fixed.h> 21 #include <linux/ethtool.h> 22 23 enum dsa_tag_protocol { 24 DSA_TAG_PROTO_NONE = 0, 25 DSA_TAG_PROTO_DSA, 26 DSA_TAG_PROTO_TRAILER, 27 DSA_TAG_PROTO_EDSA, 28 DSA_TAG_PROTO_BRCM, 29 }; 30 31 #define DSA_MAX_SWITCHES 4 32 #define DSA_MAX_PORTS 12 33 34 struct dsa_chip_data { 35 /* 36 * How to access the switch configuration registers. 37 */ 38 struct device *host_dev; 39 int sw_addr; 40 41 /* set to size of eeprom if supported by the switch */ 42 int eeprom_len; 43 44 /* Device tree node pointer for this specific switch chip 45 * used during switch setup in case additional properties 46 * and resources needs to be used 47 */ 48 struct device_node *of_node; 49 50 /* 51 * The names of the switch's ports. Use "cpu" to 52 * designate the switch port that the cpu is connected to, 53 * "dsa" to indicate that this port is a DSA link to 54 * another switch, NULL to indicate the port is unused, 55 * or any other string to indicate this is a physical port. 56 */ 57 char *port_names[DSA_MAX_PORTS]; 58 struct device_node *port_dn[DSA_MAX_PORTS]; 59 60 /* 61 * An array (with nr_chips elements) of which element [a] 62 * indicates which port on this switch should be used to 63 * send packets to that are destined for switch a. Can be 64 * NULL if there is only one switch chip. 65 */ 66 s8 *rtable; 67 }; 68 69 struct dsa_platform_data { 70 /* 71 * Reference to a Linux network interface that connects 72 * to the root switch chip of the tree. 73 */ 74 struct device *netdev; 75 76 /* 77 * Info structs describing each of the switch chips 78 * connected via this network interface. 79 */ 80 int nr_chips; 81 struct dsa_chip_data *chip; 82 }; 83 84 struct packet_type; 85 86 struct dsa_switch_tree { 87 /* 88 * Configuration data for the platform device that owns 89 * this dsa switch tree instance. 90 */ 91 struct dsa_platform_data *pd; 92 93 /* 94 * Reference to network device to use, and which tagging 95 * protocol to use. 96 */ 97 struct net_device *master_netdev; 98 int (*rcv)(struct sk_buff *skb, 99 struct net_device *dev, 100 struct packet_type *pt, 101 struct net_device *orig_dev); 102 enum dsa_tag_protocol tag_protocol; 103 104 /* 105 * The switch and port to which the CPU is attached. 106 */ 107 s8 cpu_switch; 108 s8 cpu_port; 109 110 /* 111 * Link state polling. 112 */ 113 int link_poll_needed; 114 struct work_struct link_poll_work; 115 struct timer_list link_poll_timer; 116 117 /* 118 * Data for the individual switch chips. 119 */ 120 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 121 }; 122 123 struct dsa_switch { 124 /* 125 * Parent switch tree, and switch index. 126 */ 127 struct dsa_switch_tree *dst; 128 int index; 129 130 /* 131 * Configuration data for this switch. 132 */ 133 struct dsa_chip_data *pd; 134 135 /* 136 * The used switch driver. 137 */ 138 struct dsa_switch_driver *drv; 139 140 /* 141 * Reference to host device to use. 142 */ 143 struct device *master_dev; 144 145 #ifdef CONFIG_NET_DSA_HWMON 146 /* 147 * Hardware monitoring information 148 */ 149 char hwmon_name[IFNAMSIZ + 8]; 150 struct device *hwmon_dev; 151 #endif 152 153 /* 154 * Slave mii_bus and devices for the individual ports. 155 */ 156 u32 dsa_port_mask; 157 u32 phys_port_mask; 158 u32 phys_mii_mask; 159 struct mii_bus *slave_mii_bus; 160 struct net_device *ports[DSA_MAX_PORTS]; 161 }; 162 163 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 164 { 165 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); 166 } 167 168 static inline u8 dsa_upstream_port(struct dsa_switch *ds) 169 { 170 struct dsa_switch_tree *dst = ds->dst; 171 172 /* 173 * If this is the root switch (i.e. the switch that connects 174 * to the CPU), return the cpu port number on this switch. 175 * Else return the (DSA) port number that connects to the 176 * switch that is one hop closer to the cpu. 177 */ 178 if (dst->cpu_switch == ds->index) 179 return dst->cpu_port; 180 else 181 return ds->pd->rtable[dst->cpu_switch]; 182 } 183 184 struct dsa_switch_driver { 185 struct list_head list; 186 187 enum dsa_tag_protocol tag_protocol; 188 int priv_size; 189 190 /* 191 * Probing and setup. 192 */ 193 char *(*probe)(struct device *host_dev, int sw_addr); 194 int (*setup)(struct dsa_switch *ds); 195 int (*set_addr)(struct dsa_switch *ds, u8 *addr); 196 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 197 198 /* 199 * Access to the switch's PHY registers. 200 */ 201 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 202 int (*phy_write)(struct dsa_switch *ds, int port, 203 int regnum, u16 val); 204 205 /* 206 * Link state polling and IRQ handling. 207 */ 208 void (*poll_link)(struct dsa_switch *ds); 209 210 /* 211 * Link state adjustment (called from libphy) 212 */ 213 void (*adjust_link)(struct dsa_switch *ds, int port, 214 struct phy_device *phydev); 215 void (*fixed_link_update)(struct dsa_switch *ds, int port, 216 struct fixed_phy_status *st); 217 218 /* 219 * ethtool hardware statistics. 220 */ 221 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data); 222 void (*get_ethtool_stats)(struct dsa_switch *ds, 223 int port, uint64_t *data); 224 int (*get_sset_count)(struct dsa_switch *ds); 225 226 /* 227 * ethtool Wake-on-LAN 228 */ 229 void (*get_wol)(struct dsa_switch *ds, int port, 230 struct ethtool_wolinfo *w); 231 int (*set_wol)(struct dsa_switch *ds, int port, 232 struct ethtool_wolinfo *w); 233 234 /* 235 * Suspend and resume 236 */ 237 int (*suspend)(struct dsa_switch *ds); 238 int (*resume)(struct dsa_switch *ds); 239 240 /* 241 * Port enable/disable 242 */ 243 int (*port_enable)(struct dsa_switch *ds, int port, 244 struct phy_device *phy); 245 void (*port_disable)(struct dsa_switch *ds, int port, 246 struct phy_device *phy); 247 248 /* 249 * EEE setttings 250 */ 251 int (*set_eee)(struct dsa_switch *ds, int port, 252 struct phy_device *phydev, 253 struct ethtool_eee *e); 254 int (*get_eee)(struct dsa_switch *ds, int port, 255 struct ethtool_eee *e); 256 257 #ifdef CONFIG_NET_DSA_HWMON 258 /* Hardware monitoring */ 259 int (*get_temp)(struct dsa_switch *ds, int *temp); 260 int (*get_temp_limit)(struct dsa_switch *ds, int *temp); 261 int (*set_temp_limit)(struct dsa_switch *ds, int temp); 262 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm); 263 #endif 264 265 /* EEPROM access */ 266 int (*get_eeprom_len)(struct dsa_switch *ds); 267 int (*get_eeprom)(struct dsa_switch *ds, 268 struct ethtool_eeprom *eeprom, u8 *data); 269 int (*set_eeprom)(struct dsa_switch *ds, 270 struct ethtool_eeprom *eeprom, u8 *data); 271 272 /* 273 * Register access. 274 */ 275 int (*get_regs_len)(struct dsa_switch *ds, int port); 276 void (*get_regs)(struct dsa_switch *ds, int port, 277 struct ethtool_regs *regs, void *p); 278 }; 279 280 void register_switch_driver(struct dsa_switch_driver *type); 281 void unregister_switch_driver(struct dsa_switch_driver *type); 282 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); 283 284 static inline void *ds_to_priv(struct dsa_switch *ds) 285 { 286 return (void *)(ds + 1); 287 } 288 289 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) 290 { 291 return dst->rcv != NULL; 292 } 293 #endif 294