1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Texas Instruments ICSSG Ethernet driver 3 * 4 * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/ 5 * 6 */ 7 8 #ifndef __NET_TI_ICSSG_PRUETH_H 9 #define __NET_TI_ICSSG_PRUETH_H 10 11 #include <linux/bpf.h> 12 #include <linux/bpf_trace.h> 13 #include <linux/etherdevice.h> 14 #include <linux/genalloc.h> 15 #include <linux/if_vlan.h> 16 #include <linux/if_hsr.h> 17 #include <linux/interrupt.h> 18 #include <linux/kernel.h> 19 #include <linux/mfd/syscon.h> 20 #include <linux/module.h> 21 #include <linux/mutex.h> 22 #include <linux/net_tstamp.h> 23 #include <linux/of.h> 24 #include <linux/of_irq.h> 25 #include <linux/of_mdio.h> 26 #include <linux/of_net.h> 27 #include <linux/of_platform.h> 28 #include <linux/phy.h> 29 #include <linux/remoteproc/pruss.h> 30 #include <linux/pruss_driver.h> 31 #include <linux/ptp_clock_kernel.h> 32 #include <linux/remoteproc.h> 33 34 #include <linux/dma-mapping.h> 35 #include <linux/dma/ti-cppi5.h> 36 #include <linux/dma/k3-udma-glue.h> 37 38 #include <net/devlink.h> 39 #include <net/xdp.h> 40 #include <net/page_pool/helpers.h> 41 42 #include "icssg_config.h" 43 #include "icss_iep.h" 44 #include "icssg_switch_map.h" 45 46 #define PRUETH_MAX_MTU (2000 - ETH_HLEN - ETH_FCS_LEN) 47 #define PRUETH_MIN_PKT_SIZE (VLAN_ETH_ZLEN) 48 #define PRUETH_MAX_PKT_SIZE (PRUETH_MAX_MTU + ETH_HLEN + ETH_FCS_LEN) 49 50 #define ICSS_SLICE0 0 51 #define ICSS_SLICE1 1 52 53 #define ICSS_FW_PRU 0 54 #define ICSS_FW_RTU 1 55 56 #define ICSSG_MAX_RFLOWS 8 /* per slice */ 57 58 #define ICSSG_NUM_PA_STATS 32 59 #define ICSSG_NUM_MIIG_STATS 60 60 /* Number of ICSSG related stats */ 61 #define ICSSG_NUM_STATS (ICSSG_NUM_MIIG_STATS + ICSSG_NUM_PA_STATS) 62 #define ICSSG_NUM_STANDARD_STATS 31 63 #define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS) 64 65 #define IEP_DEFAULT_CYCLE_TIME_NS 1000000 /* 1 ms */ 66 67 #define PRUETH_UNDIRECTED_PKT_DST_TAG 0 68 #define PRUETH_UNDIRECTED_PKT_TAG_INS BIT(30) 69 70 /* Firmware status codes */ 71 #define ICSS_HS_FW_READY 0x55555555 72 #define ICSS_HS_FW_DEAD 0xDEAD0000 /* lower 16 bits contain error code */ 73 74 /* Firmware command codes */ 75 #define ICSS_HS_CMD_BUSY 0x40000000 76 #define ICSS_HS_CMD_DONE 0x80000000 77 #define ICSS_HS_CMD_CANCEL 0x10000000 78 79 /* Firmware commands */ 80 #define ICSS_CMD_SPAD 0x20 81 #define ICSS_CMD_RXTX 0x10 82 #define ICSS_CMD_ADD_FDB 0x1 83 #define ICSS_CMD_DEL_FDB 0x2 84 #define ICSS_CMD_SET_RUN 0x4 85 #define ICSS_CMD_GET_FDB_SLOT 0x5 86 #define ICSS_CMD_ENABLE_VLAN 0x5 87 #define ICSS_CMD_DISABLE_VLAN 0x6 88 #define ICSS_CMD_ADD_FILTER 0x7 89 #define ICSS_CMD_ADD_MAC 0x8 90 91 /* VLAN Filtering Related MACROs */ 92 #define PRUETH_DFLT_VLAN_HSR 1 93 #define PRUETH_DFLT_VLAN_SW 1 94 #define PRUETH_DFLT_VLAN_MAC 0 95 #define MAX_VLAN_ID 256 96 97 /* In switch mode there are 3 real ports i.e. 3 mac addrs. 98 * however Linux sees only the host side port. The other 2 ports 99 * are the switch ports. 100 * In emac mode there are 2 real ports i.e. 2 mac addrs. 101 * Linux sees both the ports. 102 */ 103 enum prueth_port { 104 PRUETH_PORT_HOST = 0, /* host side port */ 105 PRUETH_PORT_MII0, /* physical port RG/SG MII 0 */ 106 PRUETH_PORT_MII1, /* physical port RG/SG MII 1 */ 107 PRUETH_PORT_INVALID, /* Invalid prueth port */ 108 }; 109 110 enum prueth_mac { 111 PRUETH_MAC0 = 0, 112 PRUETH_MAC1, 113 PRUETH_NUM_MACS, 114 PRUETH_MAC_INVALID, 115 }; 116 117 struct prueth_tx_chn { 118 struct device *dma_dev; 119 struct napi_struct napi_tx; 120 struct k3_cppi_desc_pool *desc_pool; 121 struct k3_udma_glue_tx_channel *tx_chn; 122 struct prueth_emac *emac; 123 u32 id; 124 u32 descs_num; 125 unsigned int irq; 126 char name[32]; 127 struct hrtimer tx_hrtimer; 128 unsigned long tx_pace_timeout_ns; 129 }; 130 131 struct prueth_rx_chn { 132 struct device *dev; 133 struct device *dma_dev; 134 struct k3_cppi_desc_pool *desc_pool; 135 struct k3_udma_glue_rx_channel *rx_chn; 136 u32 descs_num; 137 unsigned int irq[ICSSG_MAX_RFLOWS]; /* separate irq per flow */ 138 char name[32]; 139 struct page_pool *pg_pool; 140 struct xdp_rxq_info xdp_rxq; 141 }; 142 143 enum prueth_swdata_type { 144 PRUETH_SWDATA_INVALID = 0, 145 PRUETH_SWDATA_SKB, 146 PRUETH_SWDATA_PAGE, 147 PRUETH_SWDATA_CMD, 148 PRUETH_SWDATA_XDPF, 149 }; 150 151 struct prueth_swdata { 152 enum prueth_swdata_type type; 153 union prueth_data { 154 struct sk_buff *skb; 155 struct page *page; 156 u32 cmd; 157 struct xdp_frame *xdpf; 158 } data; 159 }; 160 161 /* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3) 162 * and lower three are lower priority channels or threads. 163 */ 164 #define PRUETH_MAX_TX_QUEUES 4 165 166 #define PRUETH_MAX_TX_TS_REQUESTS 50 /* Max simultaneous TX_TS requests */ 167 168 /* XDP BPF state */ 169 #define ICSSG_XDP_PASS 0 170 #define ICSSG_XDP_CONSUMED BIT(0) 171 #define ICSSG_XDP_TX BIT(1) 172 #define ICSSG_XDP_REDIR BIT(2) 173 174 /* Minimum coalesce time in usecs for both Tx and Rx */ 175 #define ICSSG_MIN_COALESCE_USECS 20 176 177 /* data for each emac port */ 178 struct prueth_emac { 179 bool is_sr1; 180 struct prueth *prueth; 181 struct net_device *ndev; 182 u8 mac_addr[6]; 183 struct napi_struct napi_rx; 184 u32 msg_enable; 185 186 int link; 187 int speed; 188 int duplex; 189 190 const char *phy_id; 191 struct device_node *phy_node; 192 phy_interface_t phy_if; 193 enum prueth_port port_id; 194 struct icss_iep *iep; 195 unsigned int rx_ts_enabled : 1; 196 unsigned int tx_ts_enabled : 1; 197 unsigned int half_duplex : 1; 198 199 /* DMA related */ 200 struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES]; 201 struct completion tdown_complete; 202 atomic_t tdown_cnt; 203 struct prueth_rx_chn rx_chns; 204 int rx_flow_id_base; 205 int tx_ch_num; 206 207 /* SR1.0 Management channel */ 208 struct prueth_rx_chn rx_mgm_chn; 209 int rx_mgm_flow_id_base; 210 211 spinlock_t lock; /* serialize access */ 212 213 /* TX HW Timestamping */ 214 /* TX TS cookie will be index to the tx_ts_skb array */ 215 struct sk_buff *tx_ts_skb[PRUETH_MAX_TX_TS_REQUESTS]; 216 atomic_t tx_ts_pending; 217 int tx_ts_irq; 218 219 u8 cmd_seq; 220 /* shutdown related */ 221 __le32 cmd_data[4]; 222 struct completion cmd_complete; 223 /* Mutex to serialize access to firmware command interface */ 224 struct mutex cmd_lock; 225 struct work_struct rx_mode_work; 226 struct workqueue_struct *cmd_wq; 227 228 struct pruss_mem_region dram; 229 230 bool offload_fwd_mark; 231 int port_vlan; 232 233 struct delayed_work stats_work; 234 u64 stats[ICSSG_NUM_MIIG_STATS]; 235 u64 pa_stats[ICSSG_NUM_PA_STATS]; 236 237 /* RX IRQ Coalescing Related */ 238 struct hrtimer rx_hrtimer; 239 unsigned long rx_pace_timeout_ns; 240 241 struct netdev_hw_addr_list vlan_mcast_list[MAX_VLAN_ID]; 242 struct bpf_prog *xdp_prog; 243 struct xdp_attachment_info xdpi; 244 }; 245 246 /* The buf includes headroom compatible with both skb and xdpf */ 247 #define PRUETH_HEADROOM_NA (max(XDP_PACKET_HEADROOM, NET_SKB_PAD) + NET_IP_ALIGN) 248 #define PRUETH_HEADROOM ALIGN(PRUETH_HEADROOM_NA, sizeof(long)) 249 250 /** 251 * struct prueth_pdata - PRUeth platform data 252 * @fdqring_mode: Free desc queue mode 253 * @quirk_10m_link_issue: 10M link detect errata 254 * @switch_mode: switch firmware support 255 * @banked_ms_ram: banked memory support 256 */ 257 struct prueth_pdata { 258 enum k3_ring_mode fdqring_mode; 259 u32 quirk_10m_link_issue:1; 260 u32 switch_mode:1; 261 u32 banked_ms_ram:1; 262 }; 263 264 struct icssg_firmwares { 265 const char *pru; 266 const char *rtu; 267 const char *txpru; 268 }; 269 270 /** 271 * struct prueth - PRUeth structure 272 * @dev: device 273 * @pruss: pruss handle 274 * @pru: rproc instances of PRUs 275 * @rtu: rproc instances of RTUs 276 * @txpru: rproc instances of TX_PRUs 277 * @shram: PRUSS shared RAM region 278 * @sram_pool: MSMC RAM pool for buffers 279 * @msmcram: MSMC RAM region 280 * @eth_node: DT node for the port 281 * @emac: private EMAC data structure 282 * @registered_netdevs: list of registered netdevs 283 * @miig_rt: regmap to mii_g_rt block 284 * @mii_rt: regmap to mii_rt block 285 * @pa_stats: regmap to pa_stats block 286 * @pru_id: ID for each of the PRUs 287 * @pdev: pointer to ICSSG platform device 288 * @pdata: pointer to platform data for ICSSG driver 289 * @icssg_hwcmdseq: seq counter or HWQ messages 290 * @emacs_initialized: num of EMACs/ext ports that are up/running 291 * @iep0: pointer to IEP0 device 292 * @iep1: pointer to IEP1 device 293 * @vlan_tbl: VLAN-FID table pointer 294 * @hw_bridge_dev: pointer to HW bridge net device 295 * @hsr_dev: pointer to the HSR net device 296 * @hsr_prp_version: enum to store the protocol version of hsr master 297 * @br_members: bitmask of bridge member ports 298 * @hsr_members: bitmask of hsr member ports 299 * @prueth_netdevice_nb: netdevice notifier block 300 * @prueth_switchdev_nb: switchdev notifier block 301 * @prueth_switchdev_bl_nb: switchdev blocking notifier block 302 * @is_switch_mode: flag to indicate if device is in Switch mode 303 * @is_hsr_offload_mode: flag to indicate if device is in hsr offload mode 304 * @is_switchmode_supported: indicates platform support for switch mode 305 * @switch_id: ID for mapping switch ports to bridge 306 * @default_vlan: Default VLAN for host 307 * @icssg_emac_firmwares: Firmware names for EMAC mode, indexed per MAC 308 * @icssg_switch_firmwares: Firmware names for SWITCH mode, indexed per MAC 309 * @icssg_hsr_firmwares: Firmware names for HSR mode, indexed per MAC 310 * @icssg_prp_firmwares: Firmware names for PRP mode, indexed per MAC 311 */ 312 struct prueth { 313 struct device *dev; 314 struct pruss *pruss; 315 struct rproc *pru[PRUSS_NUM_PRUS]; 316 struct rproc *rtu[PRUSS_NUM_PRUS]; 317 struct rproc *txpru[PRUSS_NUM_PRUS]; 318 struct pruss_mem_region shram; 319 struct gen_pool *sram_pool; 320 struct pruss_mem_region msmcram; 321 322 struct device_node *eth_node[PRUETH_NUM_MACS]; 323 struct prueth_emac *emac[PRUETH_NUM_MACS]; 324 struct net_device *registered_netdevs[PRUETH_NUM_MACS]; 325 struct regmap *miig_rt; 326 struct regmap *mii_rt; 327 struct regmap *pa_stats; 328 329 enum pruss_pru_id pru_id[PRUSS_NUM_PRUS]; 330 struct platform_device *pdev; 331 struct prueth_pdata pdata; 332 u8 icssg_hwcmdseq; 333 int emacs_initialized; 334 struct icss_iep *iep0; 335 struct icss_iep *iep1; 336 struct prueth_vlan_tbl *vlan_tbl; 337 338 struct net_device *hw_bridge_dev; 339 struct net_device *hsr_dev; 340 enum hsr_version hsr_prp_version; 341 u8 br_members; 342 u8 hsr_members; 343 struct notifier_block prueth_netdevice_nb; 344 struct notifier_block prueth_switchdev_nb; 345 struct notifier_block prueth_switchdev_bl_nb; 346 bool is_switch_mode; 347 bool is_hsr_offload_mode; 348 bool is_switchmode_supported; 349 unsigned char switch_id[MAX_PHYS_ITEM_ID_LEN]; 350 int default_vlan; 351 /** @vtbl_lock: Lock for vtbl in shared memory */ 352 spinlock_t vtbl_lock; 353 /** @stats_lock: Lock for reading icssg stats */ 354 spinlock_t stats_lock; 355 struct icssg_firmwares icssg_emac_firmwares[PRUETH_NUM_MACS]; 356 struct icssg_firmwares icssg_switch_firmwares[PRUETH_NUM_MACS]; 357 struct icssg_firmwares icssg_hsr_firmwares[PRUETH_NUM_MACS]; 358 struct icssg_firmwares icssg_prp_firmwares[PRUETH_NUM_MACS]; 359 }; 360 361 struct emac_tx_ts_response { 362 u32 reserved[2]; 363 u32 cookie; 364 u32 lo_ts; 365 u32 hi_ts; 366 }; 367 368 struct emac_tx_ts_response_sr1 { 369 __le32 lo_ts; 370 __le32 hi_ts; 371 __le32 reserved; 372 __le32 cookie; 373 }; 374 375 /* get PRUSS SLICE number from prueth_emac */ 376 static inline int prueth_emac_slice(struct prueth_emac *emac) 377 { 378 switch (emac->port_id) { 379 case PRUETH_PORT_MII0: 380 return ICSS_SLICE0; 381 case PRUETH_PORT_MII1: 382 return ICSS_SLICE1; 383 default: 384 return -EINVAL; 385 } 386 } 387 388 extern const struct ethtool_ops icssg_ethtool_ops; 389 extern const struct dev_pm_ops prueth_dev_pm_ops; 390 391 static inline u64 icssg_read_time(const void __iomem *addr) 392 { 393 u32 low, high; 394 395 do { 396 high = readl(addr + 4); 397 low = readl(addr); 398 } while (high != readl(addr + 4)); 399 400 return low + ((u64)high << 32); 401 } 402 403 /* Classifier helpers */ 404 void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac); 405 void icssg_class_set_host_mac_addr(struct regmap *miig_rt, const u8 *mac); 406 void icssg_class_disable(struct regmap *miig_rt, int slice); 407 void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti, 408 bool is_sr1); 409 void icssg_class_promiscuous_sr1(struct regmap *miig_rt, int slice); 410 void icssg_class_add_mcast_sr1(struct regmap *miig_rt, int slice, 411 struct net_device *ndev); 412 void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr); 413 414 /* config helpers */ 415 void icssg_config_ipg(struct prueth_emac *emac); 416 int icssg_config(struct prueth *prueth, struct prueth_emac *emac, 417 int slice); 418 int icssg_set_port_state(struct prueth_emac *emac, 419 enum icssg_port_state_cmd state); 420 void icssg_config_set_speed(struct prueth_emac *emac); 421 void icssg_config_half_duplex(struct prueth_emac *emac); 422 void icssg_init_emac_mode(struct prueth *prueth); 423 void icssg_init_fw_offload_mode(struct prueth *prueth); 424 425 /* Buffer queue helpers */ 426 int icssg_queue_pop(struct prueth *prueth, u8 queue); 427 void icssg_queue_push(struct prueth *prueth, int queue, u16 addr); 428 u32 icssg_queue_level(struct prueth *prueth, int queue); 429 430 int icssg_send_fdb_msg(struct prueth_emac *emac, struct mgmt_cmd *cmd, 431 struct mgmt_cmd_rsp *rsp); 432 int icssg_fdb_add_del(struct prueth_emac *emac, const unsigned char *addr, 433 u8 vid, u8 fid_c2, bool add); 434 int icssg_fdb_lookup(struct prueth_emac *emac, const unsigned char *addr, 435 u8 vid); 436 void icssg_vtbl_modify(struct prueth_emac *emac, u8 vid, u8 port_mask, 437 u8 untag_mask, bool add); 438 u16 icssg_get_pvid(struct prueth_emac *emac); 439 void icssg_set_pvid(struct prueth *prueth, u8 vid, u8 port); 440 int emac_fdb_flow_id_updated(struct prueth_emac *emac); 441 #define prueth_napi_to_tx_chn(pnapi) \ 442 container_of(pnapi, struct prueth_tx_chn, napi_tx) 443 444 void icssg_stats_work_handler(struct work_struct *work); 445 void emac_update_hardware_stats(struct prueth_emac *emac); 446 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name); 447 448 /* Common functions */ 449 void prueth_cleanup_rx_chns(struct prueth_emac *emac, 450 struct prueth_rx_chn *rx_chn, 451 int max_rflows); 452 void prueth_cleanup_tx_chns(struct prueth_emac *emac); 453 void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num); 454 void prueth_xmit_free(struct prueth_tx_chn *tx_chn, 455 struct cppi5_host_desc_t *desc); 456 int emac_tx_complete_packets(struct prueth_emac *emac, int chn, 457 int budget, bool *tdown); 458 int prueth_ndev_add_tx_napi(struct prueth_emac *emac); 459 int prueth_init_tx_chns(struct prueth_emac *emac); 460 int prueth_init_rx_chns(struct prueth_emac *emac, 461 struct prueth_rx_chn *rx_chn, 462 char *name, u32 max_rflows, 463 u32 max_desc_num); 464 int prueth_dma_rx_push_mapped(struct prueth_emac *emac, 465 struct prueth_rx_chn *rx_chn, 466 struct page *page, u32 buf_len); 467 unsigned int prueth_rxbuf_total_len(unsigned int len); 468 void emac_rx_timestamp(struct prueth_emac *emac, 469 struct sk_buff *skb, u32 *psdata); 470 enum netdev_tx icssg_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev); 471 irqreturn_t prueth_rx_irq(int irq, void *dev_id); 472 void prueth_cleanup_tx_ts(struct prueth_emac *emac); 473 int icssg_napi_rx_poll(struct napi_struct *napi_rx, int budget); 474 int prueth_prepare_rx_chan(struct prueth_emac *emac, 475 struct prueth_rx_chn *chn, 476 int buf_size); 477 void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num, 478 bool free_skb); 479 void prueth_reset_rx_chan(struct prueth_rx_chn *chn, 480 int num_flows, bool disable); 481 void icssg_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue); 482 int icssg_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd); 483 void icssg_ndo_get_stats64(struct net_device *ndev, 484 struct rtnl_link_stats64 *stats); 485 int icssg_ndo_get_phys_port_name(struct net_device *ndev, char *name, 486 size_t len); 487 int prueth_node_port(struct device_node *eth_node); 488 int prueth_node_mac(struct device_node *eth_node); 489 void prueth_netdev_exit(struct prueth *prueth, 490 struct device_node *eth_node); 491 int prueth_get_cores(struct prueth *prueth, int slice, bool is_sr1); 492 void prueth_put_cores(struct prueth *prueth, int slice); 493 494 /* Revision specific helper */ 495 u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns); 496 u32 emac_xmit_xdp_frame(struct prueth_emac *emac, 497 struct xdp_frame *xdpf, 498 struct page *page, 499 unsigned int q_idx); 500 501 #endif /* __NET_TI_ICSSG_PRUETH_H */ 502