1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Texas Instruments Ethernet Switch Driver 4 * 5 * Copyright (C) 2012 Texas Instruments 6 * 7 */ 8 9#include <linux/kernel.h> 10#include <linux/io.h> 11#include <linux/clk.h> 12#include <linux/timer.h> 13#include <linux/module.h> 14#include <linux/platform_device.h> 15#include <linux/irqreturn.h> 16#include <linux/interrupt.h> 17#include <linux/if_ether.h> 18#include <linux/etherdevice.h> 19#include <linux/netdevice.h> 20#include <linux/net_tstamp.h> 21#include <linux/phy.h> 22#include <linux/phy/phy.h> 23#include <linux/workqueue.h> 24#include <linux/delay.h> 25#include <linux/pm_runtime.h> 26#include <linux/gpio/consumer.h> 27#include <linux/of.h> 28#include <linux/of_mdio.h> 29#include <linux/of_net.h> 30#include <linux/of_platform.h> 31#include <linux/if_vlan.h> 32#include <linux/kmemleak.h> 33#include <linux/sys_soc.h> 34#include <net/page_pool/helpers.h> 35#include <linux/bpf.h> 36#include <linux/bpf_trace.h> 37 38#include <linux/pinctrl/consumer.h> 39#include <net/pkt_cls.h> 40 41#include "cpsw.h" 42#include "cpsw_ale.h" 43#include "cpsw_priv.h" 44#include "cpsw_sl.h" 45#include "cpts.h" 46#include "davinci_cpdma.h" 47 48#include <net/pkt_sched.h> 49 50static int debug_level; 51module_param(debug_level, int, 0); 52MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)"); 53 54static int ale_ageout = 10; 55module_param(ale_ageout, int, 0); 56MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)"); 57 58static int rx_packet_max = CPSW_MAX_PACKET_SIZE; 59module_param(rx_packet_max, int, 0); 60MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)"); 61 62static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT; 63module_param(descs_pool_size, int, 0444); 64MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool"); 65 66#define for_each_slave(priv, func, arg...) \ 67 do { \ 68 struct cpsw_slave *slave; \ 69 struct cpsw_common *cpsw = (priv)->cpsw; \ 70 int n; \ 71 if (cpsw->data.dual_emac) \ 72 (func)((cpsw)->slaves + priv->emac_port, ##arg);\ 73 else \ 74 for (n = cpsw->data.slaves, \ 75 slave = cpsw->slaves; \ 76 n; n--) \ 77 (func)(slave++, ##arg); \ 78 } while (0) 79 80static int cpsw_slave_index_priv(struct cpsw_common *cpsw, 81 struct cpsw_priv *priv) 82{ 83 return cpsw->data.dual_emac ? priv->emac_port : cpsw->data.active_slave; 84} 85 86static int cpsw_get_slave_port(u32 slave_num) 87{ 88 return slave_num + 1; 89} 90 91static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev, 92 __be16 proto, u16 vid); 93 94static void cpsw_set_promiscious(struct net_device *ndev, bool enable) 95{ 96 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 97 struct cpsw_ale *ale = cpsw->ale; 98 int i; 99 100 if (cpsw->data.dual_emac) { 101 bool flag = false; 102 103 /* Enabling promiscuous mode for one interface will be 104 * common for both the interface as the interface shares 105 * the same hardware resource. 106 */ 107 for (i = 0; i < cpsw->data.slaves; i++) 108 if (cpsw->slaves[i].ndev->flags & IFF_PROMISC) 109 flag = true; 110 111 if (!enable && flag) { 112 enable = true; 113 dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n"); 114 } 115 116 if (enable) { 117 /* Enable Bypass */ 118 cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1); 119 120 dev_dbg(&ndev->dev, "promiscuity enabled\n"); 121 } else { 122 /* Disable Bypass */ 123 cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0); 124 dev_dbg(&ndev->dev, "promiscuity disabled\n"); 125 } 126 } else { 127 if (enable) { 128 unsigned long timeout = jiffies + HZ; 129 130 /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */ 131 for (i = 0; i <= cpsw->data.slaves; i++) { 132 cpsw_ale_control_set(ale, i, 133 ALE_PORT_NOLEARN, 1); 134 cpsw_ale_control_set(ale, i, 135 ALE_PORT_NO_SA_UPDATE, 1); 136 } 137 138 /* Clear All Untouched entries */ 139 cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1); 140 do { 141 cpu_relax(); 142 if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT)) 143 break; 144 } while (time_after(timeout, jiffies)); 145 cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1); 146 147 /* Clear all mcast from ALE */ 148 cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1); 149 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL); 150 151 /* Flood All Unicast Packets to Host port */ 152 cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1); 153 dev_dbg(&ndev->dev, "promiscuity enabled\n"); 154 } else { 155 /* Don't Flood All Unicast Packets to Host port */ 156 cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0); 157 158 /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */ 159 for (i = 0; i <= cpsw->data.slaves; i++) { 160 cpsw_ale_control_set(ale, i, 161 ALE_PORT_NOLEARN, 0); 162 cpsw_ale_control_set(ale, i, 163 ALE_PORT_NO_SA_UPDATE, 0); 164 } 165 dev_dbg(&ndev->dev, "promiscuity disabled\n"); 166 } 167 } 168} 169 170/** 171 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes 172 * if it's not deleted 173 * @ndev: device to sync 174 * @addr: address to be added or deleted 175 * @vid: vlan id, if vid < 0 set/unset address for real device 176 * @add: add address if the flag is set or remove otherwise 177 */ 178static int cpsw_set_mc(struct net_device *ndev, const u8 *addr, 179 int vid, int add) 180{ 181 struct cpsw_priv *priv = netdev_priv(ndev); 182 struct cpsw_common *cpsw = priv->cpsw; 183 int mask, flags, ret; 184 185 if (vid < 0) { 186 if (cpsw->data.dual_emac) 187 vid = cpsw->slaves[priv->emac_port].port_vlan; 188 else 189 vid = 0; 190 } 191 192 mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS; 193 flags = vid ? ALE_VLAN : 0; 194 195 if (add) 196 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0); 197 else 198 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid); 199 200 return ret; 201} 202 203static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx) 204{ 205 struct addr_sync_ctx *sync_ctx = ctx; 206 struct netdev_hw_addr *ha; 207 int found = 0, ret = 0; 208 209 if (!vdev || !(vdev->flags & IFF_UP)) 210 return 0; 211 212 /* vlan address is relevant if its sync_cnt != 0 */ 213 netdev_for_each_mc_addr(ha, vdev) { 214 if (ether_addr_equal(ha->addr, sync_ctx->addr)) { 215 found = ha->sync_cnt; 216 break; 217 } 218 } 219 220 if (found) 221 sync_ctx->consumed++; 222 223 if (sync_ctx->flush) { 224 if (!found) 225 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); 226 return 0; 227 } 228 229 if (found) 230 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1); 231 232 return ret; 233} 234 235static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num) 236{ 237 struct addr_sync_ctx sync_ctx; 238 int ret; 239 240 sync_ctx.consumed = 0; 241 sync_ctx.addr = addr; 242 sync_ctx.ndev = ndev; 243 sync_ctx.flush = 0; 244 245 ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); 246 if (sync_ctx.consumed < num && !ret) 247 ret = cpsw_set_mc(ndev, addr, -1, 1); 248 249 return ret; 250} 251 252static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num) 253{ 254 struct addr_sync_ctx sync_ctx; 255 256 sync_ctx.consumed = 0; 257 sync_ctx.addr = addr; 258 sync_ctx.ndev = ndev; 259 sync_ctx.flush = 1; 260 261 vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); 262 if (sync_ctx.consumed == num) 263 cpsw_set_mc(ndev, addr, -1, 0); 264 265 return 0; 266} 267 268static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx) 269{ 270 struct addr_sync_ctx *sync_ctx = ctx; 271 struct netdev_hw_addr *ha; 272 int found = 0; 273 274 if (!vdev || !(vdev->flags & IFF_UP)) 275 return 0; 276 277 /* vlan address is relevant if its sync_cnt != 0 */ 278 netdev_for_each_mc_addr(ha, vdev) { 279 if (ether_addr_equal(ha->addr, sync_ctx->addr)) { 280 found = ha->sync_cnt; 281 break; 282 } 283 } 284 285 if (!found) 286 return 0; 287 288 sync_ctx->consumed++; 289 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); 290 return 0; 291} 292 293static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num) 294{ 295 struct addr_sync_ctx sync_ctx; 296 297 sync_ctx.addr = addr; 298 sync_ctx.ndev = ndev; 299 sync_ctx.consumed = 0; 300 301 vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx); 302 if (sync_ctx.consumed < num) 303 cpsw_set_mc(ndev, addr, -1, 0); 304 305 return 0; 306} 307 308static void cpsw_ndo_set_rx_mode(struct net_device *ndev) 309{ 310 struct cpsw_priv *priv = netdev_priv(ndev); 311 struct cpsw_common *cpsw = priv->cpsw; 312 int slave_port = -1; 313 314 if (cpsw->data.dual_emac) 315 slave_port = priv->emac_port + 1; 316 317 if (ndev->flags & IFF_PROMISC) { 318 /* Enable promiscuous mode */ 319 cpsw_set_promiscious(ndev, true); 320 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port); 321 return; 322 } else { 323 /* Disable promiscuous mode */ 324 cpsw_set_promiscious(ndev, false); 325 } 326 327 /* Restore allmulti on vlans if necessary */ 328 cpsw_ale_set_allmulti(cpsw->ale, 329 ndev->flags & IFF_ALLMULTI, slave_port); 330 331 /* add/remove mcast address either for real netdev or for vlan */ 332 __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr, 333 cpsw_del_mc_addr); 334} 335 336static unsigned int cpsw_rxbuf_total_len(unsigned int len) 337{ 338 len += CPSW_HEADROOM_NA; 339 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 340 341 return SKB_DATA_ALIGN(len); 342} 343 344static void cpsw_rx_handler(void *token, int len, int status) 345{ 346 struct page *new_page, *page = token; 347 void *pa = page_address(page); 348 struct cpsw_meta_xdp *xmeta = pa + CPSW_XMETA_OFFSET; 349 struct cpsw_common *cpsw = ndev_to_cpsw(xmeta->ndev); 350 int pkt_size = cpsw->rx_packet_max; 351 int ret = 0, port, ch = xmeta->ch; 352 int headroom = CPSW_HEADROOM_NA; 353 struct net_device *ndev = xmeta->ndev; 354 struct cpsw_priv *priv; 355 struct page_pool *pool; 356 struct sk_buff *skb; 357 struct xdp_buff xdp; 358 dma_addr_t dma; 359 360 if (cpsw->data.dual_emac && status >= 0) { 361 port = CPDMA_RX_SOURCE_PORT(status); 362 if (port) 363 ndev = cpsw->slaves[--port].ndev; 364 } 365 366 priv = netdev_priv(ndev); 367 pool = cpsw->page_pool[ch]; 368 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) { 369 /* In dual emac mode check for all interfaces */ 370 if (cpsw->data.dual_emac && cpsw->usage_count && 371 (status >= 0)) { 372 /* The packet received is for the interface which 373 * is already down and the other interface is up 374 * and running, instead of freeing which results 375 * in reducing of the number of rx descriptor in 376 * DMA engine, requeue page back to cpdma. 377 */ 378 new_page = page; 379 goto requeue; 380 } 381 382 /* the interface is going down, pages are purged */ 383 page_pool_recycle_direct(pool, page); 384 return; 385 } 386 387 new_page = page_pool_dev_alloc_pages(pool); 388 if (unlikely(!new_page)) { 389 new_page = page; 390 ndev->stats.rx_dropped++; 391 goto requeue; 392 } 393 394 if (priv->xdp_prog) { 395 int size = len; 396 397 xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]); 398 if (status & CPDMA_RX_VLAN_ENCAP) { 399 headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE; 400 size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE; 401 } 402 403 xdp_prepare_buff(&xdp, pa, headroom, size, false); 404 405 port = priv->emac_port + cpsw->data.dual_emac; 406 ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len); 407 if (ret != CPSW_XDP_PASS) 408 goto requeue; 409 410 headroom = xdp.data - xdp.data_hard_start; 411 412 /* XDP prog can modify vlan tag, so can't use encap header */ 413 status &= ~CPDMA_RX_VLAN_ENCAP; 414 } 415 416 /* pass skb to netstack if no XDP prog or returned XDP_PASS */ 417 skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size)); 418 if (!skb) { 419 ndev->stats.rx_dropped++; 420 page_pool_recycle_direct(pool, page); 421 goto requeue; 422 } 423 424 skb_reserve(skb, headroom); 425 skb_put(skb, len); 426 skb->dev = ndev; 427 if (status & CPDMA_RX_VLAN_ENCAP) 428 cpsw_rx_vlan_encap(skb); 429 if (priv->rx_ts_enabled) 430 cpts_rx_timestamp(cpsw->cpts, skb); 431 skb->protocol = eth_type_trans(skb, ndev); 432 433 /* mark skb for recycling */ 434 skb_mark_for_recycle(skb); 435 netif_receive_skb(skb); 436 437 ndev->stats.rx_bytes += len; 438 ndev->stats.rx_packets++; 439 440requeue: 441 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET; 442 xmeta->ndev = ndev; 443 xmeta->ch = ch; 444 445 dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA; 446 ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma, 447 pkt_size, 0); 448 if (ret < 0) { 449 WARN_ON(ret == -ENOMEM); 450 page_pool_recycle_direct(pool, new_page); 451 } 452} 453 454static void _cpsw_adjust_link(struct cpsw_slave *slave, 455 struct cpsw_priv *priv, bool *link) 456{ 457 struct phy_device *phy = slave->phy; 458 u32 mac_control = 0; 459 u32 slave_port; 460 struct cpsw_common *cpsw = priv->cpsw; 461 462 if (!phy) 463 return; 464 465 slave_port = cpsw_get_slave_port(slave->slave_num); 466 467 if (phy->link) { 468 mac_control = CPSW_SL_CTL_GMII_EN; 469 470 if (phy->speed == 1000) 471 mac_control |= CPSW_SL_CTL_GIG; 472 if (phy->duplex) 473 mac_control |= CPSW_SL_CTL_FULLDUPLEX; 474 475 /* set speed_in input in case RMII mode is used in 100Mbps */ 476 if (phy->speed == 100) 477 mac_control |= CPSW_SL_CTL_IFCTL_A; 478 /* in band mode only works in 10Mbps RGMII mode */ 479 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy)) 480 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */ 481 482 if (priv->rx_pause) 483 mac_control |= CPSW_SL_CTL_RX_FLOW_EN; 484 485 if (priv->tx_pause) 486 mac_control |= CPSW_SL_CTL_TX_FLOW_EN; 487 488 if (mac_control != slave->mac_control) 489 cpsw_sl_ctl_set(slave->mac_sl, mac_control); 490 491 /* enable forwarding */ 492 cpsw_ale_control_set(cpsw->ale, slave_port, 493 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 494 495 *link = true; 496 497 if (priv->shp_cfg_speed && 498 priv->shp_cfg_speed != slave->phy->speed && 499 !cpsw_shp_is_off(priv)) 500 dev_warn(priv->dev, 501 "Speed was changed, CBS shaper speeds are changed!"); 502 } else { 503 mac_control = 0; 504 /* disable forwarding */ 505 cpsw_ale_control_set(cpsw->ale, slave_port, 506 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 507 508 cpsw_sl_wait_for_idle(slave->mac_sl, 100); 509 510 cpsw_sl_ctl_reset(slave->mac_sl); 511 } 512 513 if (mac_control != slave->mac_control) 514 phy_print_status(phy); 515 516 slave->mac_control = mac_control; 517} 518 519static void cpsw_adjust_link(struct net_device *ndev) 520{ 521 struct cpsw_priv *priv = netdev_priv(ndev); 522 struct cpsw_common *cpsw = priv->cpsw; 523 bool link = false; 524 525 for_each_slave(priv, _cpsw_adjust_link, priv, &link); 526 527 if (link) { 528 if (cpsw_need_resplit(cpsw)) 529 cpsw_split_res(cpsw); 530 531 netif_carrier_on(ndev); 532 if (netif_running(ndev)) 533 netif_tx_wake_all_queues(ndev); 534 } else { 535 netif_carrier_off(ndev); 536 netif_tx_stop_all_queues(ndev); 537 } 538} 539 540static inline void cpsw_add_dual_emac_def_ale_entries( 541 struct cpsw_priv *priv, struct cpsw_slave *slave, 542 u32 slave_port) 543{ 544 struct cpsw_common *cpsw = priv->cpsw; 545 u32 port_mask = 1 << slave_port | ALE_PORT_HOST; 546 547 if (cpsw->version == CPSW_VERSION_1) 548 slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN); 549 else 550 slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN); 551 cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask, 552 port_mask, port_mask, 0); 553 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 554 ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0); 555 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, 556 HOST_PORT_NUM, ALE_VLAN | 557 ALE_SECURE, slave->port_vlan); 558 cpsw_ale_control_set(cpsw->ale, slave_port, 559 ALE_PORT_DROP_UNKNOWN_VLAN, 1); 560} 561 562static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv) 563{ 564 u32 slave_port; 565 struct phy_device *phy; 566 struct cpsw_common *cpsw = priv->cpsw; 567 568 cpsw_sl_reset(slave->mac_sl, 100); 569 cpsw_sl_ctl_reset(slave->mac_sl); 570 571 /* setup priority mapping */ 572 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP, 573 RX_PRIORITY_MAPPING); 574 575 switch (cpsw->version) { 576 case CPSW_VERSION_1: 577 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP); 578 /* Increase RX FIFO size to 5 for supporting fullduplex 579 * flow control mode 580 */ 581 slave_write(slave, 582 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | 583 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS); 584 break; 585 case CPSW_VERSION_2: 586 case CPSW_VERSION_3: 587 case CPSW_VERSION_4: 588 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP); 589 /* Increase RX FIFO size to 5 for supporting fullduplex 590 * flow control mode 591 */ 592 slave_write(slave, 593 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | 594 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS); 595 break; 596 } 597 598 /* setup max packet size, and mac address */ 599 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN, 600 cpsw->rx_packet_max); 601 cpsw_set_slave_mac(slave, priv); 602 603 slave->mac_control = 0; /* no link yet */ 604 605 slave_port = cpsw_get_slave_port(slave->slave_num); 606 607 if (cpsw->data.dual_emac) 608 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port); 609 else 610 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 611 1 << slave_port, 0, 0, ALE_MCAST_FWD_2); 612 613 if (slave->data->phy_node) { 614 phy = of_phy_connect(priv->ndev, slave->data->phy_node, 615 &cpsw_adjust_link, 0, slave->data->phy_if); 616 if (!phy) { 617 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n", 618 slave->data->phy_node, 619 slave->slave_num); 620 return; 621 } 622 } else { 623 phy = phy_connect(priv->ndev, slave->data->phy_id, 624 &cpsw_adjust_link, slave->data->phy_if); 625 if (IS_ERR(phy)) { 626 dev_err(priv->dev, 627 "phy \"%s\" not found on slave %d, err %ld\n", 628 slave->data->phy_id, slave->slave_num, 629 PTR_ERR(phy)); 630 return; 631 } 632 } 633 634 phy->mac_managed_pm = true; 635 636 slave->phy = phy; 637 638 phy_attached_info(slave->phy); 639 640 phy_start(slave->phy); 641 642 /* Configure GMII_SEL register */ 643 if (!IS_ERR(slave->data->ifphy)) 644 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET, 645 slave->data->phy_if); 646 else 647 cpsw_phy_sel(cpsw->dev, slave->phy->interface, 648 slave->slave_num); 649} 650 651static inline void cpsw_add_default_vlan(struct cpsw_priv *priv) 652{ 653 struct cpsw_common *cpsw = priv->cpsw; 654 const int vlan = cpsw->data.default_vlan; 655 u32 reg; 656 int i; 657 int unreg_mcast_mask; 658 659 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN : 660 CPSW2_PORT_VLAN; 661 662 writel(vlan, &cpsw->host_port_regs->port_vlan); 663 664 for (i = 0; i < cpsw->data.slaves; i++) 665 slave_write(cpsw->slaves + i, vlan, reg); 666 667 if (priv->ndev->flags & IFF_ALLMULTI) 668 unreg_mcast_mask = ALE_ALL_PORTS; 669 else 670 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2; 671 672 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, 673 ALE_ALL_PORTS, ALE_ALL_PORTS, 674 unreg_mcast_mask); 675} 676 677static void cpsw_init_host_port(struct cpsw_priv *priv) 678{ 679 u32 fifo_mode; 680 u32 control_reg; 681 struct cpsw_common *cpsw = priv->cpsw; 682 683 /* soft reset the controller and initialize ale */ 684 soft_reset("cpsw", &cpsw->regs->soft_reset); 685 cpsw_ale_start(cpsw->ale); 686 687 /* switch to vlan unaware mode */ 688 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 689 CPSW_ALE_VLAN_AWARE); 690 control_reg = readl(&cpsw->regs->control); 691 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP; 692 writel(control_reg, &cpsw->regs->control); 693 fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE : 694 CPSW_FIFO_NORMAL_MODE; 695 writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl); 696 697 /* setup host port priority mapping */ 698 writel_relaxed(CPDMA_TX_PRIORITY_MAP, 699 &cpsw->host_port_regs->cpdma_tx_pri_map); 700 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map); 701 702 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, 703 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 704 705 if (!cpsw->data.dual_emac) { 706 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM, 707 0, 0); 708 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 709 ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2); 710 } 711} 712 713static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw) 714{ 715 u32 slave_port; 716 717 slave_port = cpsw_get_slave_port(slave->slave_num); 718 719 if (!slave->phy) 720 return; 721 phy_stop(slave->phy); 722 phy_disconnect(slave->phy); 723 slave->phy = NULL; 724 cpsw_ale_control_set(cpsw->ale, slave_port, 725 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 726 cpsw_sl_reset(slave->mac_sl, 100); 727 cpsw_sl_ctl_reset(slave->mac_sl); 728} 729 730static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg) 731{ 732 struct cpsw_priv *priv = arg; 733 734 if (!vdev) 735 return 0; 736 737 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid); 738 return 0; 739} 740 741/* restore resources after port reset */ 742static void cpsw_restore(struct cpsw_priv *priv) 743{ 744 /* restore vlan configurations */ 745 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv); 746 747 /* restore MQPRIO offload */ 748 for_each_slave(priv, cpsw_mqprio_resume, priv); 749 750 /* restore CBS offload */ 751 for_each_slave(priv, cpsw_cbs_resume, priv); 752} 753 754static int cpsw_ndo_open(struct net_device *ndev) 755{ 756 struct cpsw_priv *priv = netdev_priv(ndev); 757 struct cpsw_common *cpsw = priv->cpsw; 758 int ret; 759 u32 reg; 760 761 ret = pm_runtime_resume_and_get(cpsw->dev); 762 if (ret < 0) 763 return ret; 764 765 netif_carrier_off(ndev); 766 767 /* Notify the stack of the actual queue counts. */ 768 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num); 769 if (ret) { 770 dev_err(priv->dev, "cannot set real number of tx queues\n"); 771 goto err_cleanup; 772 } 773 774 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num); 775 if (ret) { 776 dev_err(priv->dev, "cannot set real number of rx queues\n"); 777 goto err_cleanup; 778 } 779 780 reg = cpsw->version; 781 782 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n", 783 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg), 784 CPSW_RTL_VERSION(reg)); 785 786 /* Initialize host and slave ports */ 787 if (!cpsw->usage_count) 788 cpsw_init_host_port(priv); 789 for_each_slave(priv, cpsw_slave_open, priv); 790 791 /* Add default VLAN */ 792 if (!cpsw->data.dual_emac) 793 cpsw_add_default_vlan(priv); 794 else 795 cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan, 796 ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0); 797 798 /* initialize shared resources for every ndev */ 799 if (!cpsw->usage_count) { 800 /* disable priority elevation */ 801 writel_relaxed(0, &cpsw->regs->ptype); 802 803 /* enable statistics collection only on all ports */ 804 writel_relaxed(0x7, &cpsw->regs->stat_port_en); 805 806 /* Enable internal fifo flow control */ 807 writel(0x7, &cpsw->regs->flow_control); 808 809 napi_enable(&cpsw->napi_rx); 810 napi_enable(&cpsw->napi_tx); 811 812 if (cpsw->tx_irq_disabled) { 813 cpsw->tx_irq_disabled = false; 814 enable_irq(cpsw->irqs_table[1]); 815 } 816 817 if (cpsw->rx_irq_disabled) { 818 cpsw->rx_irq_disabled = false; 819 enable_irq(cpsw->irqs_table[0]); 820 } 821 822 /* create rxqs for both infs in dual mac as they use same pool 823 * and must be destroyed together when no users. 824 */ 825 ret = cpsw_create_xdp_rxqs(cpsw); 826 if (ret < 0) 827 goto err_cleanup; 828 829 ret = cpsw_fill_rx_channels(priv); 830 if (ret < 0) 831 goto err_cleanup; 832 833 if (cpsw->cpts) { 834 if (cpts_register(cpsw->cpts)) 835 dev_err(priv->dev, "error registering cpts device\n"); 836 else 837 writel(0x10, &cpsw->wr_regs->misc_en); 838 } 839 } 840 841 cpsw_restore(priv); 842 843 /* Enable Interrupt pacing if configured */ 844 if (cpsw->coal_intvl != 0) { 845 struct ethtool_coalesce coal; 846 847 coal.rx_coalesce_usecs = cpsw->coal_intvl; 848 cpsw_set_coalesce(ndev, &coal, NULL, NULL); 849 } 850 851 cpdma_ctlr_start(cpsw->dma); 852 cpsw_intr_enable(cpsw); 853 cpsw->usage_count++; 854 855 return 0; 856 857err_cleanup: 858 if (!cpsw->usage_count) { 859 napi_disable(&cpsw->napi_rx); 860 napi_disable(&cpsw->napi_tx); 861 cpdma_ctlr_stop(cpsw->dma); 862 cpsw_destroy_xdp_rxqs(cpsw); 863 } 864 865 for_each_slave(priv, cpsw_slave_stop, cpsw); 866 pm_runtime_put_sync(cpsw->dev); 867 netif_carrier_off(priv->ndev); 868 return ret; 869} 870 871static int cpsw_ndo_stop(struct net_device *ndev) 872{ 873 struct cpsw_priv *priv = netdev_priv(ndev); 874 struct cpsw_common *cpsw = priv->cpsw; 875 876 cpsw_info(priv, ifdown, "shutting down cpsw device\n"); 877 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc); 878 netif_tx_stop_all_queues(priv->ndev); 879 netif_carrier_off(priv->ndev); 880 881 if (cpsw->usage_count <= 1) { 882 napi_disable(&cpsw->napi_rx); 883 napi_disable(&cpsw->napi_tx); 884 cpts_unregister(cpsw->cpts); 885 cpsw_intr_disable(cpsw); 886 cpdma_ctlr_stop(cpsw->dma); 887 cpsw_ale_stop(cpsw->ale); 888 cpsw_destroy_xdp_rxqs(cpsw); 889 } 890 for_each_slave(priv, cpsw_slave_stop, cpsw); 891 892 if (cpsw_need_resplit(cpsw)) 893 cpsw_split_res(cpsw); 894 895 cpsw->usage_count--; 896 pm_runtime_put_sync(cpsw->dev); 897 return 0; 898} 899 900static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb, 901 struct net_device *ndev) 902{ 903 struct cpsw_priv *priv = netdev_priv(ndev); 904 struct cpsw_common *cpsw = priv->cpsw; 905 struct cpts *cpts = cpsw->cpts; 906 struct netdev_queue *txq; 907 struct cpdma_chan *txch; 908 int ret, q_idx; 909 910 if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) { 911 cpsw_err(priv, tx_err, "packet pad failed\n"); 912 ndev->stats.tx_dropped++; 913 return NET_XMIT_DROP; 914 } 915 916 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 917 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb)) 918 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 919 920 q_idx = skb_get_queue_mapping(skb); 921 if (q_idx >= cpsw->tx_ch_num) 922 q_idx = q_idx % cpsw->tx_ch_num; 923 924 txch = cpsw->txv[q_idx].ch; 925 txq = netdev_get_tx_queue(ndev, q_idx); 926 skb_tx_timestamp(skb); 927 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len, 928 priv->emac_port + cpsw->data.dual_emac); 929 if (unlikely(ret != 0)) { 930 cpsw_err(priv, tx_err, "desc submit failed\n"); 931 goto fail; 932 } 933 934 /* If there is no more tx desc left free then we need to 935 * tell the kernel to stop sending us tx frames. 936 */ 937 if (unlikely(!cpdma_check_free_tx_desc(txch))) { 938 netif_tx_stop_queue(txq); 939 940 /* Barrier, so that stop_queue visible to other cpus */ 941 smp_mb__after_atomic(); 942 943 if (cpdma_check_free_tx_desc(txch)) 944 netif_tx_wake_queue(txq); 945 } 946 947 return NETDEV_TX_OK; 948fail: 949 ndev->stats.tx_dropped++; 950 netif_tx_stop_queue(txq); 951 952 /* Barrier, so that stop_queue visible to other cpus */ 953 smp_mb__after_atomic(); 954 955 if (cpdma_check_free_tx_desc(txch)) 956 netif_tx_wake_queue(txq); 957 958 return NETDEV_TX_BUSY; 959} 960 961static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p) 962{ 963 struct cpsw_priv *priv = netdev_priv(ndev); 964 struct sockaddr *addr = (struct sockaddr *)p; 965 struct cpsw_common *cpsw = priv->cpsw; 966 int flags = 0; 967 u16 vid = 0; 968 int ret; 969 970 if (!is_valid_ether_addr(addr->sa_data)) 971 return -EADDRNOTAVAIL; 972 973 ret = pm_runtime_resume_and_get(cpsw->dev); 974 if (ret < 0) 975 return ret; 976 977 if (cpsw->data.dual_emac) { 978 vid = cpsw->slaves[priv->emac_port].port_vlan; 979 flags = ALE_VLAN; 980 } 981 982 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM, 983 flags, vid); 984 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM, 985 flags, vid); 986 987 memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN); 988 eth_hw_addr_set(ndev, priv->mac_addr); 989 for_each_slave(priv, cpsw_set_slave_mac, priv); 990 991 pm_runtime_put(cpsw->dev); 992 993 return 0; 994} 995 996static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv, 997 unsigned short vid) 998{ 999 int ret; 1000 int unreg_mcast_mask = 0; 1001 int mcast_mask; 1002 u32 port_mask; 1003 struct cpsw_common *cpsw = priv->cpsw; 1004 1005 if (cpsw->data.dual_emac) { 1006 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST; 1007 1008 mcast_mask = ALE_PORT_HOST; 1009 if (priv->ndev->flags & IFF_ALLMULTI) 1010 unreg_mcast_mask = mcast_mask; 1011 } else { 1012 port_mask = ALE_ALL_PORTS; 1013 mcast_mask = port_mask; 1014 1015 if (priv->ndev->flags & IFF_ALLMULTI) 1016 unreg_mcast_mask = ALE_ALL_PORTS; 1017 else 1018 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2; 1019 } 1020 1021 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask, 1022 unreg_mcast_mask); 1023 if (ret != 0) 1024 return ret; 1025 1026 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, 1027 HOST_PORT_NUM, ALE_VLAN, vid); 1028 if (ret != 0) 1029 goto clean_vid; 1030 1031 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 1032 mcast_mask, ALE_VLAN, vid, 0); 1033 if (ret != 0) 1034 goto clean_vlan_ucast; 1035 return 0; 1036 1037clean_vlan_ucast: 1038 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, 1039 HOST_PORT_NUM, ALE_VLAN, vid); 1040clean_vid: 1041 cpsw_ale_del_vlan(cpsw->ale, vid, 0); 1042 return ret; 1043} 1044 1045static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev, 1046 __be16 proto, u16 vid) 1047{ 1048 struct cpsw_priv *priv = netdev_priv(ndev); 1049 struct cpsw_common *cpsw = priv->cpsw; 1050 int ret; 1051 1052 if (vid == cpsw->data.default_vlan) 1053 return 0; 1054 1055 ret = pm_runtime_resume_and_get(cpsw->dev); 1056 if (ret < 0) 1057 return ret; 1058 1059 if (cpsw->data.dual_emac) { 1060 /* In dual EMAC, reserved VLAN id should not be used for 1061 * creating VLAN interfaces as this can break the dual 1062 * EMAC port separation 1063 */ 1064 int i; 1065 1066 for (i = 0; i < cpsw->data.slaves; i++) { 1067 if (vid == cpsw->slaves[i].port_vlan) { 1068 ret = -EINVAL; 1069 goto err; 1070 } 1071 } 1072 } 1073 1074 dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid); 1075 ret = cpsw_add_vlan_ale_entry(priv, vid); 1076err: 1077 pm_runtime_put(cpsw->dev); 1078 return ret; 1079} 1080 1081static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev, 1082 __be16 proto, u16 vid) 1083{ 1084 struct cpsw_priv *priv = netdev_priv(ndev); 1085 struct cpsw_common *cpsw = priv->cpsw; 1086 int ret; 1087 1088 if (vid == cpsw->data.default_vlan) 1089 return 0; 1090 1091 ret = pm_runtime_resume_and_get(cpsw->dev); 1092 if (ret < 0) 1093 return ret; 1094 1095 if (cpsw->data.dual_emac) { 1096 int i; 1097 1098 for (i = 0; i < cpsw->data.slaves; i++) { 1099 if (vid == cpsw->slaves[i].port_vlan) 1100 goto err; 1101 } 1102 } 1103 1104 dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid); 1105 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0); 1106 ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, 1107 HOST_PORT_NUM, ALE_VLAN, vid); 1108 ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast, 1109 0, ALE_VLAN, vid); 1110 ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid); 1111err: 1112 pm_runtime_put(cpsw->dev); 1113 return ret; 1114} 1115 1116static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n, 1117 struct xdp_frame **frames, u32 flags) 1118{ 1119 struct cpsw_priv *priv = netdev_priv(ndev); 1120 struct cpsw_common *cpsw = priv->cpsw; 1121 struct xdp_frame *xdpf; 1122 int i, nxmit = 0, port; 1123 1124 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 1125 return -EINVAL; 1126 1127 for (i = 0; i < n; i++) { 1128 xdpf = frames[i]; 1129 if (xdpf->len < CPSW_MIN_PACKET_SIZE) 1130 break; 1131 1132 port = priv->emac_port + cpsw->data.dual_emac; 1133 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port)) 1134 break; 1135 nxmit++; 1136 } 1137 1138 return nxmit; 1139} 1140 1141#ifdef CONFIG_NET_POLL_CONTROLLER 1142static void cpsw_ndo_poll_controller(struct net_device *ndev) 1143{ 1144 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1145 1146 cpsw_intr_disable(cpsw); 1147 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw); 1148 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw); 1149 cpsw_intr_enable(cpsw); 1150} 1151#endif 1152 1153static const struct net_device_ops cpsw_netdev_ops = { 1154 .ndo_open = cpsw_ndo_open, 1155 .ndo_stop = cpsw_ndo_stop, 1156 .ndo_start_xmit = cpsw_ndo_start_xmit, 1157 .ndo_set_mac_address = cpsw_ndo_set_mac_address, 1158 .ndo_eth_ioctl = cpsw_ndo_ioctl, 1159 .ndo_validate_addr = eth_validate_addr, 1160 .ndo_tx_timeout = cpsw_ndo_tx_timeout, 1161 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode, 1162 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate, 1163#ifdef CONFIG_NET_POLL_CONTROLLER 1164 .ndo_poll_controller = cpsw_ndo_poll_controller, 1165#endif 1166 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid, 1167 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid, 1168 .ndo_setup_tc = cpsw_ndo_setup_tc, 1169 .ndo_bpf = cpsw_ndo_bpf, 1170 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit, 1171}; 1172 1173static void cpsw_get_drvinfo(struct net_device *ndev, 1174 struct ethtool_drvinfo *info) 1175{ 1176 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1177 struct platform_device *pdev = to_platform_device(cpsw->dev); 1178 1179 strscpy(info->driver, "cpsw", sizeof(info->driver)); 1180 strscpy(info->version, "1.0", sizeof(info->version)); 1181 strscpy(info->bus_info, pdev->name, sizeof(info->bus_info)); 1182} 1183 1184static int cpsw_set_pauseparam(struct net_device *ndev, 1185 struct ethtool_pauseparam *pause) 1186{ 1187 struct cpsw_priv *priv = netdev_priv(ndev); 1188 bool link; 1189 1190 priv->rx_pause = pause->rx_pause ? true : false; 1191 priv->tx_pause = pause->tx_pause ? true : false; 1192 1193 for_each_slave(priv, _cpsw_adjust_link, priv, &link); 1194 return 0; 1195} 1196 1197static int cpsw_set_channels(struct net_device *ndev, 1198 struct ethtool_channels *chs) 1199{ 1200 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler); 1201} 1202 1203static const struct ethtool_ops cpsw_ethtool_ops = { 1204 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS, 1205 .get_drvinfo = cpsw_get_drvinfo, 1206 .get_msglevel = cpsw_get_msglevel, 1207 .set_msglevel = cpsw_set_msglevel, 1208 .get_link = ethtool_op_get_link, 1209 .get_ts_info = cpsw_get_ts_info, 1210 .get_coalesce = cpsw_get_coalesce, 1211 .set_coalesce = cpsw_set_coalesce, 1212 .get_sset_count = cpsw_get_sset_count, 1213 .get_strings = cpsw_get_strings, 1214 .get_ethtool_stats = cpsw_get_ethtool_stats, 1215 .get_pauseparam = cpsw_get_pauseparam, 1216 .set_pauseparam = cpsw_set_pauseparam, 1217 .get_wol = cpsw_get_wol, 1218 .set_wol = cpsw_set_wol, 1219 .get_regs_len = cpsw_get_regs_len, 1220 .get_regs = cpsw_get_regs, 1221 .begin = cpsw_ethtool_op_begin, 1222 .complete = cpsw_ethtool_op_complete, 1223 .get_channels = cpsw_get_channels, 1224 .set_channels = cpsw_set_channels, 1225 .get_link_ksettings = cpsw_get_link_ksettings, 1226 .set_link_ksettings = cpsw_set_link_ksettings, 1227 .get_eee = cpsw_get_eee, 1228 .set_eee = cpsw_set_eee, 1229 .nway_reset = cpsw_nway_reset, 1230 .get_ringparam = cpsw_get_ringparam, 1231 .set_ringparam = cpsw_set_ringparam, 1232}; 1233 1234static int cpsw_probe_dt(struct cpsw_platform_data *data, 1235 struct platform_device *pdev) 1236{ 1237 struct device_node *node = pdev->dev.of_node; 1238 struct device_node *slave_node; 1239 int i = 0, ret; 1240 u32 prop; 1241 1242 if (!node) 1243 return -EINVAL; 1244 1245 if (of_property_read_u32(node, "slaves", &prop)) { 1246 dev_err(&pdev->dev, "Missing slaves property in the DT.\n"); 1247 return -EINVAL; 1248 } 1249 data->slaves = prop; 1250 1251 if (of_property_read_u32(node, "active_slave", &prop)) { 1252 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n"); 1253 return -EINVAL; 1254 } 1255 data->active_slave = prop; 1256 1257 data->slave_data = devm_kcalloc(&pdev->dev, 1258 data->slaves, 1259 sizeof(struct cpsw_slave_data), 1260 GFP_KERNEL); 1261 if (!data->slave_data) 1262 return -ENOMEM; 1263 1264 if (of_property_read_u32(node, "cpdma_channels", &prop)) { 1265 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n"); 1266 return -EINVAL; 1267 } 1268 data->channels = prop; 1269 1270 if (of_property_read_u32(node, "bd_ram_size", &prop)) { 1271 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n"); 1272 return -EINVAL; 1273 } 1274 data->bd_ram_size = prop; 1275 1276 if (of_property_read_u32(node, "mac_control", &prop)) { 1277 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n"); 1278 return -EINVAL; 1279 } 1280 data->mac_control = prop; 1281 1282 if (of_property_read_bool(node, "dual_emac")) 1283 data->dual_emac = true; 1284 1285 /* 1286 * Populate all the child nodes here... 1287 */ 1288 ret = of_platform_populate(node, NULL, NULL, &pdev->dev); 1289 /* We do not want to force this, as in some cases may not have child */ 1290 if (ret) 1291 dev_warn(&pdev->dev, "Doesn't have any child node\n"); 1292 1293 for_each_available_child_of_node(node, slave_node) { 1294 struct cpsw_slave_data *slave_data = data->slave_data + i; 1295 int lenp; 1296 const __be32 *parp; 1297 1298 /* This is no slave child node, continue */ 1299 if (!of_node_name_eq(slave_node, "slave")) 1300 continue; 1301 1302 slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node, 1303 NULL); 1304 if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) && 1305 IS_ERR(slave_data->ifphy)) { 1306 ret = PTR_ERR(slave_data->ifphy); 1307 dev_err(&pdev->dev, 1308 "%d: Error retrieving port phy: %d\n", i, ret); 1309 goto err_node_put; 1310 } 1311 1312 slave_data->slave_node = slave_node; 1313 slave_data->phy_node = of_parse_phandle(slave_node, 1314 "phy-handle", 0); 1315 parp = of_get_property(slave_node, "phy_id", &lenp); 1316 if (slave_data->phy_node) { 1317 dev_dbg(&pdev->dev, 1318 "slave[%d] using phy-handle=\"%pOF\"\n", 1319 i, slave_data->phy_node); 1320 } else if (of_phy_is_fixed_link(slave_node)) { 1321 /* In the case of a fixed PHY, the DT node associated 1322 * to the PHY is the Ethernet MAC DT node. 1323 */ 1324 ret = of_phy_register_fixed_link(slave_node); 1325 if (ret) { 1326 dev_err_probe(&pdev->dev, ret, "failed to register fixed-link phy\n"); 1327 goto err_node_put; 1328 } 1329 slave_data->phy_node = of_node_get(slave_node); 1330 } else if (parp) { 1331 u32 phyid; 1332 struct device_node *mdio_node; 1333 struct platform_device *mdio; 1334 1335 if (lenp != (sizeof(__be32) * 2)) { 1336 dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i); 1337 goto no_phy_slave; 1338 } 1339 mdio_node = of_find_node_by_phandle(be32_to_cpup(parp)); 1340 phyid = be32_to_cpup(parp+1); 1341 mdio = of_find_device_by_node(mdio_node); 1342 of_node_put(mdio_node); 1343 if (!mdio) { 1344 dev_err(&pdev->dev, "Missing mdio platform device\n"); 1345 ret = -EINVAL; 1346 goto err_node_put; 1347 } 1348 snprintf(slave_data->phy_id, sizeof(slave_data->phy_id), 1349 PHY_ID_FMT, mdio->name, phyid); 1350 put_device(&mdio->dev); 1351 } else { 1352 dev_err(&pdev->dev, 1353 "No slave[%d] phy_id, phy-handle, or fixed-link property\n", 1354 i); 1355 goto no_phy_slave; 1356 } 1357 ret = of_get_phy_mode(slave_node, &slave_data->phy_if); 1358 if (ret) { 1359 dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n", 1360 i); 1361 goto err_node_put; 1362 } 1363 1364no_phy_slave: 1365 ret = of_get_mac_address(slave_node, slave_data->mac_addr); 1366 if (ret) { 1367 ret = ti_cm_get_macid(&pdev->dev, i, 1368 slave_data->mac_addr); 1369 if (ret) 1370 goto err_node_put; 1371 } 1372 if (data->dual_emac) { 1373 if (of_property_read_u32(slave_node, "dual_emac_res_vlan", 1374 &prop)) { 1375 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n"); 1376 slave_data->dual_emac_res_vlan = i+1; 1377 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n", 1378 slave_data->dual_emac_res_vlan, i); 1379 } else { 1380 slave_data->dual_emac_res_vlan = prop; 1381 } 1382 } 1383 1384 i++; 1385 if (i == data->slaves) { 1386 ret = 0; 1387 goto err_node_put; 1388 } 1389 } 1390 1391 return 0; 1392 1393err_node_put: 1394 of_node_put(slave_node); 1395 return ret; 1396} 1397 1398static void cpsw_remove_dt(struct platform_device *pdev) 1399{ 1400 struct cpsw_common *cpsw = platform_get_drvdata(pdev); 1401 struct cpsw_platform_data *data = &cpsw->data; 1402 struct device_node *node = pdev->dev.of_node; 1403 struct device_node *slave_node; 1404 int i = 0; 1405 1406 for_each_available_child_of_node(node, slave_node) { 1407 struct cpsw_slave_data *slave_data = &data->slave_data[i]; 1408 1409 if (!of_node_name_eq(slave_node, "slave")) 1410 continue; 1411 1412 if (of_phy_is_fixed_link(slave_node)) 1413 of_phy_deregister_fixed_link(slave_node); 1414 1415 of_node_put(slave_data->phy_node); 1416 1417 i++; 1418 if (i == data->slaves) { 1419 of_node_put(slave_node); 1420 break; 1421 } 1422 } 1423 1424 of_platform_depopulate(&pdev->dev); 1425} 1426 1427static int cpsw_probe_dual_emac(struct cpsw_priv *priv) 1428{ 1429 struct cpsw_common *cpsw = priv->cpsw; 1430 struct cpsw_platform_data *data = &cpsw->data; 1431 struct net_device *ndev; 1432 struct cpsw_priv *priv_sl2; 1433 int ret = 0; 1434 1435 ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv), 1436 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES); 1437 if (!ndev) { 1438 dev_err(cpsw->dev, "cpsw: error allocating net_device\n"); 1439 return -ENOMEM; 1440 } 1441 1442 priv_sl2 = netdev_priv(ndev); 1443 priv_sl2->cpsw = cpsw; 1444 priv_sl2->ndev = ndev; 1445 priv_sl2->dev = &ndev->dev; 1446 priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG); 1447 1448 if (is_valid_ether_addr(data->slave_data[1].mac_addr)) { 1449 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr, 1450 ETH_ALEN); 1451 dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n", 1452 priv_sl2->mac_addr); 1453 } else { 1454 eth_random_addr(priv_sl2->mac_addr); 1455 dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n", 1456 priv_sl2->mac_addr); 1457 } 1458 eth_hw_addr_set(ndev, priv_sl2->mac_addr); 1459 1460 priv_sl2->emac_port = 1; 1461 cpsw->slaves[1].ndev = ndev; 1462 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX; 1463 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | 1464 NETDEV_XDP_ACT_NDO_XMIT; 1465 1466 ndev->netdev_ops = &cpsw_netdev_ops; 1467 ndev->ethtool_ops = &cpsw_ethtool_ops; 1468 1469 /* register the network device */ 1470 SET_NETDEV_DEV(ndev, cpsw->dev); 1471 ndev->dev.of_node = cpsw->slaves[1].data->slave_node; 1472 ret = register_netdev(ndev); 1473 if (ret) 1474 dev_err(cpsw->dev, "cpsw: error registering net device\n"); 1475 1476 return ret; 1477} 1478 1479static const struct of_device_id cpsw_of_mtable[] = { 1480 { .compatible = "ti,cpsw"}, 1481 { .compatible = "ti,am335x-cpsw"}, 1482 { .compatible = "ti,am4372-cpsw"}, 1483 { .compatible = "ti,dra7-cpsw"}, 1484 { /* sentinel */ }, 1485}; 1486MODULE_DEVICE_TABLE(of, cpsw_of_mtable); 1487 1488static const struct soc_device_attribute cpsw_soc_devices[] = { 1489 { .family = "AM33xx", .revision = "ES1.0"}, 1490 { /* sentinel */ } 1491}; 1492 1493static int cpsw_probe(struct platform_device *pdev) 1494{ 1495 struct device *dev = &pdev->dev; 1496 struct clk *clk; 1497 struct cpsw_platform_data *data; 1498 struct net_device *ndev; 1499 struct cpsw_priv *priv; 1500 void __iomem *ss_regs; 1501 struct resource *ss_res; 1502 struct gpio_descs *mode; 1503 const struct soc_device_attribute *soc; 1504 struct cpsw_common *cpsw; 1505 int ret = 0, ch; 1506 int irq; 1507 1508 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL); 1509 if (!cpsw) 1510 return -ENOMEM; 1511 1512 platform_set_drvdata(pdev, cpsw); 1513 cpsw_slave_index = cpsw_slave_index_priv; 1514 1515 cpsw->dev = dev; 1516 1517 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW); 1518 if (IS_ERR(mode)) { 1519 ret = PTR_ERR(mode); 1520 dev_err(dev, "gpio request failed, ret %d\n", ret); 1521 return ret; 1522 } 1523 1524 clk = devm_clk_get(dev, "fck"); 1525 if (IS_ERR(clk)) { 1526 ret = PTR_ERR(clk); 1527 dev_err(dev, "fck is not found %d\n", ret); 1528 return ret; 1529 } 1530 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000; 1531 1532 ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res); 1533 if (IS_ERR(ss_regs)) 1534 return PTR_ERR(ss_regs); 1535 cpsw->regs = ss_regs; 1536 1537 cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1); 1538 if (IS_ERR(cpsw->wr_regs)) 1539 return PTR_ERR(cpsw->wr_regs); 1540 1541 /* RX IRQ */ 1542 irq = platform_get_irq(pdev, 1); 1543 if (irq < 0) 1544 return irq; 1545 cpsw->irqs_table[0] = irq; 1546 1547 /* TX IRQ */ 1548 irq = platform_get_irq(pdev, 2); 1549 if (irq < 0) 1550 return irq; 1551 cpsw->irqs_table[1] = irq; 1552 1553 /* get misc irq*/ 1554 irq = platform_get_irq(pdev, 3); 1555 if (irq <= 0) 1556 return irq; 1557 cpsw->misc_irq = irq; 1558 1559 /* 1560 * This may be required here for child devices. 1561 */ 1562 pm_runtime_enable(dev); 1563 1564 /* Need to enable clocks with runtime PM api to access module 1565 * registers 1566 */ 1567 ret = pm_runtime_resume_and_get(dev); 1568 if (ret < 0) 1569 goto clean_runtime_disable_ret; 1570 1571 ret = cpsw_probe_dt(&cpsw->data, pdev); 1572 if (ret) 1573 goto clean_dt_ret; 1574 1575 soc = soc_device_match(cpsw_soc_devices); 1576 if (soc) 1577 cpsw->quirk_irq = true; 1578 1579 data = &cpsw->data; 1580 cpsw->slaves = devm_kcalloc(dev, 1581 data->slaves, sizeof(struct cpsw_slave), 1582 GFP_KERNEL); 1583 if (!cpsw->slaves) { 1584 ret = -ENOMEM; 1585 goto clean_dt_ret; 1586 } 1587 1588 cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE); 1589 cpsw->descs_pool_size = descs_pool_size; 1590 1591 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout, 1592 ss_res->start + CPSW2_BD_OFFSET, 1593 descs_pool_size); 1594 if (ret) 1595 goto clean_dt_ret; 1596 1597 ch = cpsw->quirk_irq ? 0 : 7; 1598 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0); 1599 if (IS_ERR(cpsw->txv[0].ch)) { 1600 dev_err(dev, "error initializing tx dma channel\n"); 1601 ret = PTR_ERR(cpsw->txv[0].ch); 1602 goto clean_cpts; 1603 } 1604 1605 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1); 1606 if (IS_ERR(cpsw->rxv[0].ch)) { 1607 dev_err(dev, "error initializing rx dma channel\n"); 1608 ret = PTR_ERR(cpsw->rxv[0].ch); 1609 goto clean_cpts; 1610 } 1611 cpsw_split_res(cpsw); 1612 1613 /* setup netdev */ 1614 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv), 1615 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES); 1616 if (!ndev) { 1617 dev_err(dev, "error allocating net_device\n"); 1618 ret = -ENOMEM; 1619 goto clean_cpts; 1620 } 1621 1622 priv = netdev_priv(ndev); 1623 priv->cpsw = cpsw; 1624 priv->ndev = ndev; 1625 priv->dev = dev; 1626 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG); 1627 priv->emac_port = 0; 1628 1629 if (is_valid_ether_addr(data->slave_data[0].mac_addr)) { 1630 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN); 1631 dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr); 1632 } else { 1633 eth_random_addr(priv->mac_addr); 1634 dev_info(dev, "Random MACID = %pM\n", priv->mac_addr); 1635 } 1636 1637 eth_hw_addr_set(ndev, priv->mac_addr); 1638 1639 cpsw->slaves[0].ndev = ndev; 1640 1641 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX; 1642 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT | 1643 NETDEV_XDP_ACT_NDO_XMIT; 1644 1645 ndev->netdev_ops = &cpsw_netdev_ops; 1646 ndev->ethtool_ops = &cpsw_ethtool_ops; 1647 netif_napi_add(ndev, &cpsw->napi_rx, 1648 cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll); 1649 netif_napi_add_tx(ndev, &cpsw->napi_tx, 1650 cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll); 1651 1652 /* register the network device */ 1653 SET_NETDEV_DEV(ndev, dev); 1654 ndev->dev.of_node = cpsw->slaves[0].data->slave_node; 1655 ret = register_netdev(ndev); 1656 if (ret) { 1657 dev_err(dev, "error registering net device\n"); 1658 ret = -ENODEV; 1659 goto clean_cpts; 1660 } 1661 1662 if (cpsw->data.dual_emac) { 1663 ret = cpsw_probe_dual_emac(priv); 1664 if (ret) { 1665 cpsw_err(priv, probe, "error probe slave 2 emac interface\n"); 1666 goto clean_unregister_netdev_ret; 1667 } 1668 } 1669 1670 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and 1671 * MISC IRQs which are always kept disabled with this driver so 1672 * we will not request them. 1673 * 1674 * If anyone wants to implement support for those, make sure to 1675 * first request and append them to irqs_table array. 1676 */ 1677 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt, 1678 0, dev_name(dev), cpsw); 1679 if (ret < 0) { 1680 dev_err(dev, "error attaching irq (%d)\n", ret); 1681 goto clean_unregister_netdev_ret; 1682 } 1683 1684 1685 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt, 1686 0, dev_name(&pdev->dev), cpsw); 1687 if (ret < 0) { 1688 dev_err(dev, "error attaching irq (%d)\n", ret); 1689 goto clean_unregister_netdev_ret; 1690 } 1691 1692 if (!cpsw->cpts) 1693 goto skip_cpts; 1694 1695 ret = devm_request_irq(&pdev->dev, cpsw->misc_irq, cpsw_misc_interrupt, 1696 0, dev_name(&pdev->dev), cpsw); 1697 if (ret < 0) { 1698 dev_err(dev, "error attaching misc irq (%d)\n", ret); 1699 goto clean_unregister_netdev_ret; 1700 } 1701 1702 /* Enable misc CPTS evnt_pend IRQ */ 1703 cpts_set_irqpoll(cpsw->cpts, false); 1704 1705skip_cpts: 1706 cpsw_notice(priv, probe, 1707 "initialized device (regs %pa, irq %d, pool size %d)\n", 1708 &ss_res->start, cpsw->irqs_table[0], descs_pool_size); 1709 1710 pm_runtime_put(&pdev->dev); 1711 1712 return 0; 1713 1714clean_unregister_netdev_ret: 1715 unregister_netdev(ndev); 1716clean_cpts: 1717 cpts_release(cpsw->cpts); 1718 cpdma_ctlr_destroy(cpsw->dma); 1719clean_dt_ret: 1720 cpsw_remove_dt(pdev); 1721 pm_runtime_put_sync(&pdev->dev); 1722clean_runtime_disable_ret: 1723 pm_runtime_disable(&pdev->dev); 1724 return ret; 1725} 1726 1727static int cpsw_remove(struct platform_device *pdev) 1728{ 1729 struct cpsw_common *cpsw = platform_get_drvdata(pdev); 1730 int i, ret; 1731 1732 ret = pm_runtime_resume_and_get(&pdev->dev); 1733 if (ret < 0) 1734 return ret; 1735 1736 for (i = 0; i < cpsw->data.slaves; i++) 1737 if (cpsw->slaves[i].ndev) 1738 unregister_netdev(cpsw->slaves[i].ndev); 1739 1740 cpts_release(cpsw->cpts); 1741 cpdma_ctlr_destroy(cpsw->dma); 1742 cpsw_remove_dt(pdev); 1743 pm_runtime_put_sync(&pdev->dev); 1744 pm_runtime_disable(&pdev->dev); 1745 return 0; 1746} 1747 1748#ifdef CONFIG_PM_SLEEP 1749static int cpsw_suspend(struct device *dev) 1750{ 1751 struct cpsw_common *cpsw = dev_get_drvdata(dev); 1752 int i; 1753 1754 rtnl_lock(); 1755 1756 for (i = 0; i < cpsw->data.slaves; i++) 1757 if (cpsw->slaves[i].ndev) 1758 if (netif_running(cpsw->slaves[i].ndev)) 1759 cpsw_ndo_stop(cpsw->slaves[i].ndev); 1760 1761 rtnl_unlock(); 1762 1763 /* Select sleep pin state */ 1764 pinctrl_pm_select_sleep_state(dev); 1765 1766 return 0; 1767} 1768 1769static int cpsw_resume(struct device *dev) 1770{ 1771 struct cpsw_common *cpsw = dev_get_drvdata(dev); 1772 int i; 1773 1774 /* Select default pin state */ 1775 pinctrl_pm_select_default_state(dev); 1776 1777 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */ 1778 rtnl_lock(); 1779 1780 for (i = 0; i < cpsw->data.slaves; i++) 1781 if (cpsw->slaves[i].ndev) 1782 if (netif_running(cpsw->slaves[i].ndev)) 1783 cpsw_ndo_open(cpsw->slaves[i].ndev); 1784 1785 rtnl_unlock(); 1786 1787 return 0; 1788} 1789#endif 1790 1791static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume); 1792 1793static struct platform_driver cpsw_driver = { 1794 .driver = { 1795 .name = "cpsw", 1796 .pm = &cpsw_pm_ops, 1797 .of_match_table = cpsw_of_mtable, 1798 }, 1799 .probe = cpsw_probe, 1800 .remove = cpsw_remove, 1801}; 1802 1803module_platform_driver(cpsw_driver); 1804 1805MODULE_LICENSE("GPL"); 1806MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>"); 1807MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>"); 1808MODULE_DESCRIPTION("TI CPSW Ethernet driver"); 1809