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 struct net_device *of_netdev; 76 77 /* 78 * Info structs describing each of the switch chips 79 * connected via this network interface. 80 */ 81 int nr_chips; 82 struct dsa_chip_data *chip; 83 }; 84 85 struct packet_type; 86 87 struct dsa_switch_tree { 88 /* 89 * Configuration data for the platform device that owns 90 * this dsa switch tree instance. 91 */ 92 struct dsa_platform_data *pd; 93 94 /* 95 * Reference to network device to use, and which tagging 96 * protocol to use. 97 */ 98 struct net_device *master_netdev; 99 int (*rcv)(struct sk_buff *skb, 100 struct net_device *dev, 101 struct packet_type *pt, 102 struct net_device *orig_dev); 103 enum dsa_tag_protocol tag_protocol; 104 105 /* 106 * The switch and port to which the CPU is attached. 107 */ 108 s8 cpu_switch; 109 s8 cpu_port; 110 111 /* 112 * Link state polling. 113 */ 114 int link_poll_needed; 115 struct work_struct link_poll_work; 116 struct timer_list link_poll_timer; 117 118 /* 119 * Data for the individual switch chips. 120 */ 121 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 122 }; 123 124 struct dsa_switch { 125 /* 126 * Parent switch tree, and switch index. 127 */ 128 struct dsa_switch_tree *dst; 129 int index; 130 131 /* 132 * Tagging protocol understood by this switch 133 */ 134 enum dsa_tag_protocol tag_protocol; 135 136 /* 137 * Configuration data for this switch. 138 */ 139 struct dsa_chip_data *pd; 140 141 /* 142 * The used switch driver. 143 */ 144 struct dsa_switch_driver *drv; 145 146 /* 147 * Reference to host device to use. 148 */ 149 struct device *master_dev; 150 151 #ifdef CONFIG_NET_DSA_HWMON 152 /* 153 * Hardware monitoring information 154 */ 155 char hwmon_name[IFNAMSIZ + 8]; 156 struct device *hwmon_dev; 157 #endif 158 159 /* 160 * Slave mii_bus and devices for the individual ports. 161 */ 162 u32 dsa_port_mask; 163 u32 phys_port_mask; 164 u32 phys_mii_mask; 165 struct mii_bus *slave_mii_bus; 166 struct net_device *ports[DSA_MAX_PORTS]; 167 }; 168 169 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 170 { 171 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); 172 } 173 174 static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p) 175 { 176 return ds->phys_port_mask & (1 << p) && ds->ports[p]; 177 } 178 179 static inline u8 dsa_upstream_port(struct dsa_switch *ds) 180 { 181 struct dsa_switch_tree *dst = ds->dst; 182 183 /* 184 * If this is the root switch (i.e. the switch that connects 185 * to the CPU), return the cpu port number on this switch. 186 * Else return the (DSA) port number that connects to the 187 * switch that is one hop closer to the cpu. 188 */ 189 if (dst->cpu_switch == ds->index) 190 return dst->cpu_port; 191 else 192 return ds->pd->rtable[dst->cpu_switch]; 193 } 194 195 struct dsa_switch_driver { 196 struct list_head list; 197 198 enum dsa_tag_protocol tag_protocol; 199 int priv_size; 200 201 /* 202 * Probing and setup. 203 */ 204 char *(*probe)(struct device *host_dev, int sw_addr); 205 int (*setup)(struct dsa_switch *ds); 206 int (*set_addr)(struct dsa_switch *ds, u8 *addr); 207 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 208 209 /* 210 * Access to the switch's PHY registers. 211 */ 212 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 213 int (*phy_write)(struct dsa_switch *ds, int port, 214 int regnum, u16 val); 215 216 /* 217 * Link state polling and IRQ handling. 218 */ 219 void (*poll_link)(struct dsa_switch *ds); 220 221 /* 222 * Link state adjustment (called from libphy) 223 */ 224 void (*adjust_link)(struct dsa_switch *ds, int port, 225 struct phy_device *phydev); 226 void (*fixed_link_update)(struct dsa_switch *ds, int port, 227 struct fixed_phy_status *st); 228 229 /* 230 * ethtool hardware statistics. 231 */ 232 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data); 233 void (*get_ethtool_stats)(struct dsa_switch *ds, 234 int port, uint64_t *data); 235 int (*get_sset_count)(struct dsa_switch *ds); 236 237 /* 238 * ethtool Wake-on-LAN 239 */ 240 void (*get_wol)(struct dsa_switch *ds, int port, 241 struct ethtool_wolinfo *w); 242 int (*set_wol)(struct dsa_switch *ds, int port, 243 struct ethtool_wolinfo *w); 244 245 /* 246 * Suspend and resume 247 */ 248 int (*suspend)(struct dsa_switch *ds); 249 int (*resume)(struct dsa_switch *ds); 250 251 /* 252 * Port enable/disable 253 */ 254 int (*port_enable)(struct dsa_switch *ds, int port, 255 struct phy_device *phy); 256 void (*port_disable)(struct dsa_switch *ds, int port, 257 struct phy_device *phy); 258 259 /* 260 * EEE setttings 261 */ 262 int (*set_eee)(struct dsa_switch *ds, int port, 263 struct phy_device *phydev, 264 struct ethtool_eee *e); 265 int (*get_eee)(struct dsa_switch *ds, int port, 266 struct ethtool_eee *e); 267 268 #ifdef CONFIG_NET_DSA_HWMON 269 /* Hardware monitoring */ 270 int (*get_temp)(struct dsa_switch *ds, int *temp); 271 int (*get_temp_limit)(struct dsa_switch *ds, int *temp); 272 int (*set_temp_limit)(struct dsa_switch *ds, int temp); 273 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm); 274 #endif 275 276 /* EEPROM access */ 277 int (*get_eeprom_len)(struct dsa_switch *ds); 278 int (*get_eeprom)(struct dsa_switch *ds, 279 struct ethtool_eeprom *eeprom, u8 *data); 280 int (*set_eeprom)(struct dsa_switch *ds, 281 struct ethtool_eeprom *eeprom, u8 *data); 282 283 /* 284 * Register access. 285 */ 286 int (*get_regs_len)(struct dsa_switch *ds, int port); 287 void (*get_regs)(struct dsa_switch *ds, int port, 288 struct ethtool_regs *regs, void *p); 289 290 /* 291 * Bridge integration 292 */ 293 int (*port_join_bridge)(struct dsa_switch *ds, int port, 294 u32 br_port_mask); 295 int (*port_leave_bridge)(struct dsa_switch *ds, int port, 296 u32 br_port_mask); 297 int (*port_stp_update)(struct dsa_switch *ds, int port, 298 u8 state); 299 int (*fdb_add)(struct dsa_switch *ds, int port, 300 const unsigned char *addr, u16 vid); 301 int (*fdb_del)(struct dsa_switch *ds, int port, 302 const unsigned char *addr, u16 vid); 303 int (*fdb_getnext)(struct dsa_switch *ds, int port, 304 unsigned char *addr, bool *is_static); 305 }; 306 307 void register_switch_driver(struct dsa_switch_driver *type); 308 void unregister_switch_driver(struct dsa_switch_driver *type); 309 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); 310 311 static inline void *ds_to_priv(struct dsa_switch *ds) 312 { 313 return (void *)(ds + 1); 314 } 315 316 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) 317 { 318 return dst->rcv != NULL; 319 } 320 #endif 321