1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Texas Instruments Ethernet Switch Driver 4 * 5 * Copyright (C) 2019 Texas Instruments 6 */ 7 8 #include <linux/io.h> 9 #include <linux/clk.h> 10 #include <linux/timer.h> 11 #include <linux/module.h> 12 #include <linux/irqreturn.h> 13 #include <linux/interrupt.h> 14 #include <linux/if_ether.h> 15 #include <linux/etherdevice.h> 16 #include <linux/net_tstamp.h> 17 #include <linux/phy.h> 18 #include <linux/phy/phy.h> 19 #include <linux/delay.h> 20 #include <linux/pinctrl/consumer.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/gpio/consumer.h> 23 #include <linux/of.h> 24 #include <linux/of_mdio.h> 25 #include <linux/of_net.h> 26 #include <linux/of_device.h> 27 #include <linux/if_vlan.h> 28 #include <linux/kmemleak.h> 29 #include <linux/sys_soc.h> 30 31 #include <net/switchdev.h> 32 #include <net/page_pool.h> 33 #include <net/pkt_cls.h> 34 #include <net/devlink.h> 35 36 #include "cpsw.h" 37 #include "cpsw_ale.h" 38 #include "cpsw_priv.h" 39 #include "cpsw_sl.h" 40 #include "cpsw_switchdev.h" 41 #include "cpts.h" 42 #include "davinci_cpdma.h" 43 44 #include <net/pkt_sched.h> 45 46 static int debug_level; 47 static int ale_ageout = CPSW_ALE_AGEOUT_DEFAULT; 48 static int rx_packet_max = CPSW_MAX_PACKET_SIZE; 49 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT; 50 51 struct cpsw_devlink { 52 struct cpsw_common *cpsw; 53 }; 54 55 enum cpsw_devlink_param_id { 56 CPSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 57 CPSW_DL_PARAM_SWITCH_MODE, 58 CPSW_DL_PARAM_ALE_BYPASS, 59 }; 60 61 /* struct cpsw_common is not needed, kept here for compatibility 62 * reasons witrh the old driver 63 */ 64 static int cpsw_slave_index_priv(struct cpsw_common *cpsw, 65 struct cpsw_priv *priv) 66 { 67 if (priv->emac_port == HOST_PORT_NUM) 68 return -1; 69 70 return priv->emac_port - 1; 71 } 72 73 static bool cpsw_is_switch_en(struct cpsw_common *cpsw) 74 { 75 return !cpsw->data.dual_emac; 76 } 77 78 static void cpsw_set_promiscious(struct net_device *ndev, bool enable) 79 { 80 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 81 bool enable_uni = false; 82 int i; 83 84 if (cpsw_is_switch_en(cpsw)) 85 return; 86 87 /* Enabling promiscuous mode for one interface will be 88 * common for both the interface as the interface shares 89 * the same hardware resource. 90 */ 91 for (i = 0; i < cpsw->data.slaves; i++) 92 if (cpsw->slaves[i].ndev && 93 (cpsw->slaves[i].ndev->flags & IFF_PROMISC)) 94 enable_uni = true; 95 96 if (!enable && enable_uni) { 97 enable = enable_uni; 98 dev_dbg(cpsw->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n"); 99 } 100 101 if (enable) { 102 /* Enable unknown unicast, reg/unreg mcast */ 103 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, 104 ALE_P0_UNI_FLOOD, 1); 105 106 dev_dbg(cpsw->dev, "promiscuity enabled\n"); 107 } else { 108 /* Disable unknown unicast */ 109 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, 110 ALE_P0_UNI_FLOOD, 0); 111 dev_dbg(cpsw->dev, "promiscuity disabled\n"); 112 } 113 } 114 115 /** 116 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes 117 * if it's not deleted 118 * @ndev: device to sync 119 * @addr: address to be added or deleted 120 * @vid: vlan id, if vid < 0 set/unset address for real device 121 * @add: add address if the flag is set or remove otherwise 122 */ 123 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr, 124 int vid, int add) 125 { 126 struct cpsw_priv *priv = netdev_priv(ndev); 127 struct cpsw_common *cpsw = priv->cpsw; 128 int mask, flags, ret, slave_no; 129 130 slave_no = cpsw_slave_index(cpsw, priv); 131 if (vid < 0) 132 vid = cpsw->slaves[slave_no].port_vlan; 133 134 mask = ALE_PORT_HOST; 135 flags = vid ? ALE_VLAN : 0; 136 137 if (add) 138 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0); 139 else 140 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid); 141 142 return ret; 143 } 144 145 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx) 146 { 147 struct addr_sync_ctx *sync_ctx = ctx; 148 struct netdev_hw_addr *ha; 149 int found = 0, ret = 0; 150 151 if (!vdev || !(vdev->flags & IFF_UP)) 152 return 0; 153 154 /* vlan address is relevant if its sync_cnt != 0 */ 155 netdev_for_each_mc_addr(ha, vdev) { 156 if (ether_addr_equal(ha->addr, sync_ctx->addr)) { 157 found = ha->sync_cnt; 158 break; 159 } 160 } 161 162 if (found) 163 sync_ctx->consumed++; 164 165 if (sync_ctx->flush) { 166 if (!found) 167 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); 168 return 0; 169 } 170 171 if (found) 172 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1); 173 174 return ret; 175 } 176 177 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num) 178 { 179 struct addr_sync_ctx sync_ctx; 180 int ret; 181 182 sync_ctx.consumed = 0; 183 sync_ctx.addr = addr; 184 sync_ctx.ndev = ndev; 185 sync_ctx.flush = 0; 186 187 ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); 188 if (sync_ctx.consumed < num && !ret) 189 ret = cpsw_set_mc(ndev, addr, -1, 1); 190 191 return ret; 192 } 193 194 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num) 195 { 196 struct addr_sync_ctx sync_ctx; 197 198 sync_ctx.consumed = 0; 199 sync_ctx.addr = addr; 200 sync_ctx.ndev = ndev; 201 sync_ctx.flush = 1; 202 203 vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx); 204 if (sync_ctx.consumed == num) 205 cpsw_set_mc(ndev, addr, -1, 0); 206 207 return 0; 208 } 209 210 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx) 211 { 212 struct addr_sync_ctx *sync_ctx = ctx; 213 struct netdev_hw_addr *ha; 214 int found = 0; 215 216 if (!vdev || !(vdev->flags & IFF_UP)) 217 return 0; 218 219 /* vlan address is relevant if its sync_cnt != 0 */ 220 netdev_for_each_mc_addr(ha, vdev) { 221 if (ether_addr_equal(ha->addr, sync_ctx->addr)) { 222 found = ha->sync_cnt; 223 break; 224 } 225 } 226 227 if (!found) 228 return 0; 229 230 sync_ctx->consumed++; 231 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0); 232 return 0; 233 } 234 235 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num) 236 { 237 struct addr_sync_ctx sync_ctx; 238 239 sync_ctx.addr = addr; 240 sync_ctx.ndev = ndev; 241 sync_ctx.consumed = 0; 242 243 vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx); 244 if (sync_ctx.consumed < num) 245 cpsw_set_mc(ndev, addr, -1, 0); 246 247 return 0; 248 } 249 250 static void cpsw_ndo_set_rx_mode(struct net_device *ndev) 251 { 252 struct cpsw_priv *priv = netdev_priv(ndev); 253 struct cpsw_common *cpsw = priv->cpsw; 254 255 if (ndev->flags & IFF_PROMISC) { 256 /* Enable promiscuous mode */ 257 cpsw_set_promiscious(ndev, true); 258 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, priv->emac_port); 259 return; 260 } 261 262 /* Disable promiscuous mode */ 263 cpsw_set_promiscious(ndev, false); 264 265 /* Restore allmulti on vlans if necessary */ 266 cpsw_ale_set_allmulti(cpsw->ale, 267 ndev->flags & IFF_ALLMULTI, priv->emac_port); 268 269 /* add/remove mcast address either for real netdev or for vlan */ 270 __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr, 271 cpsw_del_mc_addr); 272 } 273 274 static unsigned int cpsw_rxbuf_total_len(unsigned int len) 275 { 276 len += CPSW_HEADROOM_NA; 277 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); 278 279 return SKB_DATA_ALIGN(len); 280 } 281 282 static void cpsw_rx_handler(void *token, int len, int status) 283 { 284 struct page *new_page, *page = token; 285 void *pa = page_address(page); 286 int headroom = CPSW_HEADROOM_NA; 287 struct cpsw_meta_xdp *xmeta; 288 struct cpsw_common *cpsw; 289 struct net_device *ndev; 290 int port, ch, pkt_size; 291 struct cpsw_priv *priv; 292 struct page_pool *pool; 293 struct sk_buff *skb; 294 struct xdp_buff xdp; 295 int ret = 0; 296 dma_addr_t dma; 297 298 xmeta = pa + CPSW_XMETA_OFFSET; 299 cpsw = ndev_to_cpsw(xmeta->ndev); 300 ndev = xmeta->ndev; 301 pkt_size = cpsw->rx_packet_max; 302 ch = xmeta->ch; 303 304 if (status >= 0) { 305 port = CPDMA_RX_SOURCE_PORT(status); 306 if (port) 307 ndev = cpsw->slaves[--port].ndev; 308 } 309 310 priv = netdev_priv(ndev); 311 pool = cpsw->page_pool[ch]; 312 313 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) { 314 /* In dual emac mode check for all interfaces */ 315 if (cpsw->usage_count && status >= 0) { 316 /* The packet received is for the interface which 317 * is already down and the other interface is up 318 * and running, instead of freeing which results 319 * in reducing of the number of rx descriptor in 320 * DMA engine, requeue page back to cpdma. 321 */ 322 new_page = page; 323 goto requeue; 324 } 325 326 /* the interface is going down, pages are purged */ 327 page_pool_recycle_direct(pool, page); 328 return; 329 } 330 331 new_page = page_pool_dev_alloc_pages(pool); 332 if (unlikely(!new_page)) { 333 new_page = page; 334 ndev->stats.rx_dropped++; 335 goto requeue; 336 } 337 338 if (priv->xdp_prog) { 339 int size = len; 340 341 xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]); 342 if (status & CPDMA_RX_VLAN_ENCAP) { 343 headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE; 344 size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE; 345 } 346 347 xdp_prepare_buff(&xdp, pa, headroom, size, false); 348 349 ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port, &len); 350 if (ret != CPSW_XDP_PASS) 351 goto requeue; 352 353 headroom = xdp.data - xdp.data_hard_start; 354 355 /* XDP prog can modify vlan tag, so can't use encap header */ 356 status &= ~CPDMA_RX_VLAN_ENCAP; 357 } 358 359 /* pass skb to netstack if no XDP prog or returned XDP_PASS */ 360 skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size)); 361 if (!skb) { 362 ndev->stats.rx_dropped++; 363 page_pool_recycle_direct(pool, page); 364 goto requeue; 365 } 366 367 skb->offload_fwd_mark = priv->offload_fwd_mark; 368 skb_reserve(skb, headroom); 369 skb_put(skb, len); 370 skb->dev = ndev; 371 if (status & CPDMA_RX_VLAN_ENCAP) 372 cpsw_rx_vlan_encap(skb); 373 if (priv->rx_ts_enabled) 374 cpts_rx_timestamp(cpsw->cpts, skb); 375 skb->protocol = eth_type_trans(skb, ndev); 376 377 /* mark skb for recycling */ 378 skb_mark_for_recycle(skb); 379 netif_receive_skb(skb); 380 381 ndev->stats.rx_bytes += len; 382 ndev->stats.rx_packets++; 383 384 requeue: 385 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET; 386 xmeta->ndev = ndev; 387 xmeta->ch = ch; 388 389 dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA; 390 ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma, 391 pkt_size, 0); 392 if (ret < 0) { 393 WARN_ON(ret == -ENOMEM); 394 page_pool_recycle_direct(pool, new_page); 395 } 396 } 397 398 static int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv, 399 unsigned short vid) 400 { 401 struct cpsw_common *cpsw = priv->cpsw; 402 int unreg_mcast_mask = 0; 403 int mcast_mask; 404 u32 port_mask; 405 int ret; 406 407 port_mask = (1 << priv->emac_port) | ALE_PORT_HOST; 408 409 mcast_mask = ALE_PORT_HOST; 410 if (priv->ndev->flags & IFF_ALLMULTI) 411 unreg_mcast_mask = mcast_mask; 412 413 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask, 414 unreg_mcast_mask); 415 if (ret != 0) 416 return ret; 417 418 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, 419 HOST_PORT_NUM, ALE_VLAN, vid); 420 if (ret != 0) 421 goto clean_vid; 422 423 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 424 mcast_mask, ALE_VLAN, vid, 0); 425 if (ret != 0) 426 goto clean_vlan_ucast; 427 return 0; 428 429 clean_vlan_ucast: 430 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, 431 HOST_PORT_NUM, ALE_VLAN, vid); 432 clean_vid: 433 cpsw_ale_del_vlan(cpsw->ale, vid, 0); 434 return ret; 435 } 436 437 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev, 438 __be16 proto, u16 vid) 439 { 440 struct cpsw_priv *priv = netdev_priv(ndev); 441 struct cpsw_common *cpsw = priv->cpsw; 442 int ret, i; 443 444 if (cpsw_is_switch_en(cpsw)) { 445 dev_dbg(cpsw->dev, ".ndo_vlan_rx_add_vid called in switch mode\n"); 446 return 0; 447 } 448 449 if (vid == cpsw->data.default_vlan) 450 return 0; 451 452 ret = pm_runtime_resume_and_get(cpsw->dev); 453 if (ret < 0) 454 return ret; 455 456 /* In dual EMAC, reserved VLAN id should not be used for 457 * creating VLAN interfaces as this can break the dual 458 * EMAC port separation 459 */ 460 for (i = 0; i < cpsw->data.slaves; i++) { 461 if (cpsw->slaves[i].ndev && 462 vid == cpsw->slaves[i].port_vlan) { 463 ret = -EINVAL; 464 goto err; 465 } 466 } 467 468 dev_dbg(priv->dev, "Adding vlanid %d to vlan filter\n", vid); 469 ret = cpsw_add_vlan_ale_entry(priv, vid); 470 err: 471 pm_runtime_put(cpsw->dev); 472 return ret; 473 } 474 475 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg) 476 { 477 struct cpsw_priv *priv = arg; 478 479 if (!vdev || !vid) 480 return 0; 481 482 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid); 483 return 0; 484 } 485 486 /* restore resources after port reset */ 487 static void cpsw_restore(struct cpsw_priv *priv) 488 { 489 struct cpsw_common *cpsw = priv->cpsw; 490 491 /* restore vlan configurations */ 492 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv); 493 494 /* restore MQPRIO offload */ 495 cpsw_mqprio_resume(&cpsw->slaves[priv->emac_port - 1], priv); 496 497 /* restore CBS offload */ 498 cpsw_cbs_resume(&cpsw->slaves[priv->emac_port - 1], priv); 499 500 cpsw_qos_clsflower_resume(priv); 501 } 502 503 static void cpsw_init_stp_ale_entry(struct cpsw_common *cpsw) 504 { 505 static const char stpa[] = {0x01, 0x80, 0xc2, 0x0, 0x0, 0x0}; 506 507 cpsw_ale_add_mcast(cpsw->ale, stpa, 508 ALE_PORT_HOST, ALE_SUPER, 0, 509 ALE_MCAST_BLOCK_LEARN_FWD); 510 } 511 512 static void cpsw_init_host_port_switch(struct cpsw_common *cpsw) 513 { 514 int vlan = cpsw->data.default_vlan; 515 516 writel(CPSW_FIFO_NORMAL_MODE, &cpsw->host_port_regs->tx_in_ctl); 517 518 writel(vlan, &cpsw->host_port_regs->port_vlan); 519 520 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, 521 ALE_ALL_PORTS, ALE_ALL_PORTS, 522 ALE_PORT_1 | ALE_PORT_2); 523 524 cpsw_init_stp_ale_entry(cpsw); 525 526 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1); 527 dev_dbg(cpsw->dev, "Set P0_UNI_FLOOD\n"); 528 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0); 529 } 530 531 static void cpsw_init_host_port_dual_mac(struct cpsw_common *cpsw) 532 { 533 int vlan = cpsw->data.default_vlan; 534 535 writel(CPSW_FIFO_DUAL_MAC_MODE, &cpsw->host_port_regs->tx_in_ctl); 536 537 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0); 538 dev_dbg(cpsw->dev, "unset P0_UNI_FLOOD\n"); 539 540 writel(vlan, &cpsw->host_port_regs->port_vlan); 541 542 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0); 543 /* learning make no sense in dual_mac mode */ 544 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1); 545 } 546 547 static void cpsw_init_host_port(struct cpsw_priv *priv) 548 { 549 struct cpsw_common *cpsw = priv->cpsw; 550 u32 control_reg; 551 552 /* soft reset the controller and initialize ale */ 553 soft_reset("cpsw", &cpsw->regs->soft_reset); 554 cpsw_ale_start(cpsw->ale); 555 556 /* switch to vlan unaware mode */ 557 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 558 CPSW_ALE_VLAN_AWARE); 559 control_reg = readl(&cpsw->regs->control); 560 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP; 561 writel(control_reg, &cpsw->regs->control); 562 563 /* setup host port priority mapping */ 564 writel_relaxed(CPDMA_TX_PRIORITY_MAP, 565 &cpsw->host_port_regs->cpdma_tx_pri_map); 566 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map); 567 568 /* disable priority elevation */ 569 writel_relaxed(0, &cpsw->regs->ptype); 570 571 /* enable statistics collection only on all ports */ 572 writel_relaxed(0x7, &cpsw->regs->stat_port_en); 573 574 /* Enable internal fifo flow control */ 575 writel(0x7, &cpsw->regs->flow_control); 576 577 if (cpsw_is_switch_en(cpsw)) 578 cpsw_init_host_port_switch(cpsw); 579 else 580 cpsw_init_host_port_dual_mac(cpsw); 581 582 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, 583 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 584 } 585 586 static void cpsw_port_add_dual_emac_def_ale_entries(struct cpsw_priv *priv, 587 struct cpsw_slave *slave) 588 { 589 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST; 590 struct cpsw_common *cpsw = priv->cpsw; 591 u32 reg; 592 593 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN : 594 CPSW2_PORT_VLAN; 595 slave_write(slave, slave->port_vlan, reg); 596 597 cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask, 598 port_mask, port_mask, 0); 599 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 600 ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 601 ALE_MCAST_FWD); 602 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, 603 HOST_PORT_NUM, ALE_VLAN | 604 ALE_SECURE, slave->port_vlan); 605 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 606 ALE_PORT_DROP_UNKNOWN_VLAN, 1); 607 /* learning make no sense in dual_mac mode */ 608 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 609 ALE_PORT_NOLEARN, 1); 610 } 611 612 static void cpsw_port_add_switch_def_ale_entries(struct cpsw_priv *priv, 613 struct cpsw_slave *slave) 614 { 615 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST; 616 struct cpsw_common *cpsw = priv->cpsw; 617 u32 reg; 618 619 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 620 ALE_PORT_DROP_UNKNOWN_VLAN, 0); 621 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 622 ALE_PORT_NOLEARN, 0); 623 /* disabling SA_UPDATE required to make stp work, without this setting 624 * Host MAC addresses will jump between ports. 625 * As per TRM MAC address can be defined as unicast supervisory (super) 626 * by setting both (ALE_BLOCKED | ALE_SECURE) which should prevent 627 * SA_UPDATE, but HW seems works incorrectly and setting ALE_SECURE 628 * causes STP packets to be dropped due to ingress filter 629 * if (source address found) and (secure) and 630 * (receive port number != port_number)) 631 * then discard the packet 632 */ 633 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 634 ALE_PORT_NO_SA_UPDATE, 1); 635 636 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast, 637 port_mask, ALE_VLAN, slave->port_vlan, 638 ALE_MCAST_FWD_2); 639 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, 640 HOST_PORT_NUM, ALE_VLAN, slave->port_vlan); 641 642 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN : 643 CPSW2_PORT_VLAN; 644 slave_write(slave, slave->port_vlan, reg); 645 } 646 647 static void cpsw_adjust_link(struct net_device *ndev) 648 { 649 struct cpsw_priv *priv = netdev_priv(ndev); 650 struct cpsw_common *cpsw = priv->cpsw; 651 struct cpsw_slave *slave; 652 struct phy_device *phy; 653 u32 mac_control = 0; 654 655 slave = &cpsw->slaves[priv->emac_port - 1]; 656 phy = slave->phy; 657 658 if (!phy) 659 return; 660 661 if (phy->link) { 662 mac_control = CPSW_SL_CTL_GMII_EN; 663 664 if (phy->speed == 1000) 665 mac_control |= CPSW_SL_CTL_GIG; 666 if (phy->duplex) 667 mac_control |= CPSW_SL_CTL_FULLDUPLEX; 668 669 /* set speed_in input in case RMII mode is used in 100Mbps */ 670 if (phy->speed == 100) 671 mac_control |= CPSW_SL_CTL_IFCTL_A; 672 /* in band mode only works in 10Mbps RGMII mode */ 673 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy)) 674 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */ 675 676 if (priv->rx_pause) 677 mac_control |= CPSW_SL_CTL_RX_FLOW_EN; 678 679 if (priv->tx_pause) 680 mac_control |= CPSW_SL_CTL_TX_FLOW_EN; 681 682 if (mac_control != slave->mac_control) 683 cpsw_sl_ctl_set(slave->mac_sl, mac_control); 684 685 /* enable forwarding */ 686 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 687 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 688 689 netif_tx_wake_all_queues(ndev); 690 691 if (priv->shp_cfg_speed && 692 priv->shp_cfg_speed != slave->phy->speed && 693 !cpsw_shp_is_off(priv)) 694 dev_warn(priv->dev, "Speed was changed, CBS shaper speeds are changed!"); 695 } else { 696 netif_tx_stop_all_queues(ndev); 697 698 mac_control = 0; 699 /* disable forwarding */ 700 cpsw_ale_control_set(cpsw->ale, priv->emac_port, 701 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 702 703 cpsw_sl_wait_for_idle(slave->mac_sl, 100); 704 705 cpsw_sl_ctl_reset(slave->mac_sl); 706 } 707 708 if (mac_control != slave->mac_control) 709 phy_print_status(phy); 710 711 slave->mac_control = mac_control; 712 713 if (phy->link && cpsw_need_resplit(cpsw)) 714 cpsw_split_res(cpsw); 715 } 716 717 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv) 718 { 719 struct cpsw_common *cpsw = priv->cpsw; 720 struct phy_device *phy; 721 722 cpsw_sl_reset(slave->mac_sl, 100); 723 cpsw_sl_ctl_reset(slave->mac_sl); 724 725 /* setup priority mapping */ 726 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP, 727 RX_PRIORITY_MAPPING); 728 729 switch (cpsw->version) { 730 case CPSW_VERSION_1: 731 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP); 732 /* Increase RX FIFO size to 5 for supporting fullduplex 733 * flow control mode 734 */ 735 slave_write(slave, 736 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | 737 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS); 738 break; 739 case CPSW_VERSION_2: 740 case CPSW_VERSION_3: 741 case CPSW_VERSION_4: 742 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP); 743 /* Increase RX FIFO size to 5 for supporting fullduplex 744 * flow control mode 745 */ 746 slave_write(slave, 747 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) | 748 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS); 749 break; 750 } 751 752 /* setup max packet size, and mac address */ 753 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN, 754 cpsw->rx_packet_max); 755 cpsw_set_slave_mac(slave, priv); 756 757 slave->mac_control = 0; /* no link yet */ 758 759 if (cpsw_is_switch_en(cpsw)) 760 cpsw_port_add_switch_def_ale_entries(priv, slave); 761 else 762 cpsw_port_add_dual_emac_def_ale_entries(priv, slave); 763 764 if (!slave->data->phy_node) 765 dev_err(priv->dev, "no phy found on slave %d\n", 766 slave->slave_num); 767 phy = of_phy_connect(priv->ndev, slave->data->phy_node, 768 &cpsw_adjust_link, 0, slave->data->phy_if); 769 if (!phy) { 770 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n", 771 slave->data->phy_node, 772 slave->slave_num); 773 return; 774 } 775 slave->phy = phy; 776 777 phy_attached_info(slave->phy); 778 779 phy_start(slave->phy); 780 781 /* Configure GMII_SEL register */ 782 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET, 783 slave->data->phy_if); 784 } 785 786 static int cpsw_ndo_stop(struct net_device *ndev) 787 { 788 struct cpsw_priv *priv = netdev_priv(ndev); 789 struct cpsw_common *cpsw = priv->cpsw; 790 struct cpsw_slave *slave; 791 792 cpsw_info(priv, ifdown, "shutting down ndev\n"); 793 slave = &cpsw->slaves[priv->emac_port - 1]; 794 if (slave->phy) 795 phy_stop(slave->phy); 796 797 netif_tx_stop_all_queues(priv->ndev); 798 799 if (slave->phy) { 800 phy_disconnect(slave->phy); 801 slave->phy = NULL; 802 } 803 804 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc); 805 806 if (cpsw->usage_count <= 1) { 807 napi_disable(&cpsw->napi_rx); 808 napi_disable(&cpsw->napi_tx); 809 cpts_unregister(cpsw->cpts); 810 cpsw_intr_disable(cpsw); 811 cpdma_ctlr_stop(cpsw->dma); 812 cpsw_ale_stop(cpsw->ale); 813 cpsw_destroy_xdp_rxqs(cpsw); 814 } 815 816 if (cpsw_need_resplit(cpsw)) 817 cpsw_split_res(cpsw); 818 819 cpsw->usage_count--; 820 pm_runtime_put_sync(cpsw->dev); 821 return 0; 822 } 823 824 static int cpsw_ndo_open(struct net_device *ndev) 825 { 826 struct cpsw_priv *priv = netdev_priv(ndev); 827 struct cpsw_common *cpsw = priv->cpsw; 828 int ret; 829 830 dev_info(priv->dev, "starting ndev. mode: %s\n", 831 cpsw_is_switch_en(cpsw) ? "switch" : "dual_mac"); 832 ret = pm_runtime_resume_and_get(cpsw->dev); 833 if (ret < 0) 834 return ret; 835 836 /* Notify the stack of the actual queue counts. */ 837 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num); 838 if (ret) { 839 dev_err(priv->dev, "cannot set real number of tx queues\n"); 840 goto pm_cleanup; 841 } 842 843 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num); 844 if (ret) { 845 dev_err(priv->dev, "cannot set real number of rx queues\n"); 846 goto pm_cleanup; 847 } 848 849 /* Initialize host and slave ports */ 850 if (!cpsw->usage_count) 851 cpsw_init_host_port(priv); 852 cpsw_slave_open(&cpsw->slaves[priv->emac_port - 1], priv); 853 854 /* initialize shared resources for every ndev */ 855 if (!cpsw->usage_count) { 856 /* create rxqs for both infs in dual mac as they use same pool 857 * and must be destroyed together when no users. 858 */ 859 ret = cpsw_create_xdp_rxqs(cpsw); 860 if (ret < 0) 861 goto err_cleanup; 862 863 ret = cpsw_fill_rx_channels(priv); 864 if (ret < 0) 865 goto err_cleanup; 866 867 if (cpsw->cpts) { 868 if (cpts_register(cpsw->cpts)) 869 dev_err(priv->dev, "error registering cpts device\n"); 870 else 871 writel(0x10, &cpsw->wr_regs->misc_en); 872 } 873 874 napi_enable(&cpsw->napi_rx); 875 napi_enable(&cpsw->napi_tx); 876 877 if (cpsw->tx_irq_disabled) { 878 cpsw->tx_irq_disabled = false; 879 enable_irq(cpsw->irqs_table[1]); 880 } 881 882 if (cpsw->rx_irq_disabled) { 883 cpsw->rx_irq_disabled = false; 884 enable_irq(cpsw->irqs_table[0]); 885 } 886 } 887 888 cpsw_restore(priv); 889 890 /* Enable Interrupt pacing if configured */ 891 if (cpsw->coal_intvl != 0) { 892 struct ethtool_coalesce coal; 893 894 coal.rx_coalesce_usecs = cpsw->coal_intvl; 895 cpsw_set_coalesce(ndev, &coal, NULL, NULL); 896 } 897 898 cpdma_ctlr_start(cpsw->dma); 899 cpsw_intr_enable(cpsw); 900 cpsw->usage_count++; 901 902 return 0; 903 904 err_cleanup: 905 cpsw_ndo_stop(ndev); 906 907 pm_cleanup: 908 pm_runtime_put_sync(cpsw->dev); 909 return ret; 910 } 911 912 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb, 913 struct net_device *ndev) 914 { 915 struct cpsw_priv *priv = netdev_priv(ndev); 916 struct cpsw_common *cpsw = priv->cpsw; 917 struct cpts *cpts = cpsw->cpts; 918 struct netdev_queue *txq; 919 struct cpdma_chan *txch; 920 int ret, q_idx; 921 922 if (skb_put_padto(skb, READ_ONCE(priv->tx_packet_min))) { 923 cpsw_err(priv, tx_err, "packet pad failed\n"); 924 ndev->stats.tx_dropped++; 925 return NET_XMIT_DROP; 926 } 927 928 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 929 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb)) 930 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 931 932 q_idx = skb_get_queue_mapping(skb); 933 if (q_idx >= cpsw->tx_ch_num) 934 q_idx = q_idx % cpsw->tx_ch_num; 935 936 txch = cpsw->txv[q_idx].ch; 937 txq = netdev_get_tx_queue(ndev, q_idx); 938 skb_tx_timestamp(skb); 939 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len, 940 priv->emac_port); 941 if (unlikely(ret != 0)) { 942 cpsw_err(priv, tx_err, "desc submit failed\n"); 943 goto fail; 944 } 945 946 /* If there is no more tx desc left free then we need to 947 * tell the kernel to stop sending us tx frames. 948 */ 949 if (unlikely(!cpdma_check_free_tx_desc(txch))) { 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 } 958 959 return NETDEV_TX_OK; 960 fail: 961 ndev->stats.tx_dropped++; 962 netif_tx_stop_queue(txq); 963 964 /* Barrier, so that stop_queue visible to other cpus */ 965 smp_mb__after_atomic(); 966 967 if (cpdma_check_free_tx_desc(txch)) 968 netif_tx_wake_queue(txq); 969 970 return NETDEV_TX_BUSY; 971 } 972 973 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p) 974 { 975 struct sockaddr *addr = (struct sockaddr *)p; 976 struct cpsw_priv *priv = netdev_priv(ndev); 977 struct cpsw_common *cpsw = priv->cpsw; 978 int ret, slave_no; 979 int flags = 0; 980 u16 vid = 0; 981 982 slave_no = cpsw_slave_index(cpsw, priv); 983 if (!is_valid_ether_addr(addr->sa_data)) 984 return -EADDRNOTAVAIL; 985 986 ret = pm_runtime_resume_and_get(cpsw->dev); 987 if (ret < 0) 988 return ret; 989 990 vid = cpsw->slaves[slave_no].port_vlan; 991 flags = ALE_VLAN | ALE_SECURE; 992 993 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM, 994 flags, vid); 995 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM, 996 flags, vid); 997 998 ether_addr_copy(priv->mac_addr, addr->sa_data); 999 eth_hw_addr_set(ndev, priv->mac_addr); 1000 cpsw_set_slave_mac(&cpsw->slaves[slave_no], priv); 1001 1002 pm_runtime_put(cpsw->dev); 1003 1004 return 0; 1005 } 1006 1007 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev, 1008 __be16 proto, u16 vid) 1009 { 1010 struct cpsw_priv *priv = netdev_priv(ndev); 1011 struct cpsw_common *cpsw = priv->cpsw; 1012 int ret; 1013 int i; 1014 1015 if (cpsw_is_switch_en(cpsw)) { 1016 dev_dbg(cpsw->dev, "ndo del vlan is called in switch mode\n"); 1017 return 0; 1018 } 1019 1020 if (vid == cpsw->data.default_vlan) 1021 return 0; 1022 1023 ret = pm_runtime_resume_and_get(cpsw->dev); 1024 if (ret < 0) 1025 return ret; 1026 1027 /* reset the return code as pm_runtime_get_sync() can return 1028 * non zero values as well. 1029 */ 1030 ret = 0; 1031 for (i = 0; i < cpsw->data.slaves; i++) { 1032 if (cpsw->slaves[i].ndev && 1033 vid == cpsw->slaves[i].port_vlan) { 1034 ret = -EINVAL; 1035 goto err; 1036 } 1037 } 1038 1039 dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid); 1040 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0); 1041 if (ret) 1042 dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret); 1043 ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, 1044 HOST_PORT_NUM, ALE_VLAN, vid); 1045 if (ret) 1046 dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n", 1047 ret); 1048 ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast, 1049 0, ALE_VLAN, vid); 1050 if (ret) 1051 dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n", 1052 ret); 1053 cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid); 1054 ret = 0; 1055 err: 1056 pm_runtime_put(cpsw->dev); 1057 return ret; 1058 } 1059 1060 static int cpsw_ndo_get_phys_port_name(struct net_device *ndev, char *name, 1061 size_t len) 1062 { 1063 struct cpsw_priv *priv = netdev_priv(ndev); 1064 int err; 1065 1066 err = snprintf(name, len, "p%d", priv->emac_port); 1067 1068 if (err >= len) 1069 return -EINVAL; 1070 1071 return 0; 1072 } 1073 1074 #ifdef CONFIG_NET_POLL_CONTROLLER 1075 static void cpsw_ndo_poll_controller(struct net_device *ndev) 1076 { 1077 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1078 1079 cpsw_intr_disable(cpsw); 1080 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw); 1081 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw); 1082 cpsw_intr_enable(cpsw); 1083 } 1084 #endif 1085 1086 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n, 1087 struct xdp_frame **frames, u32 flags) 1088 { 1089 struct cpsw_priv *priv = netdev_priv(ndev); 1090 struct xdp_frame *xdpf; 1091 int i, nxmit = 0; 1092 1093 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 1094 return -EINVAL; 1095 1096 for (i = 0; i < n; i++) { 1097 xdpf = frames[i]; 1098 if (xdpf->len < READ_ONCE(priv->tx_packet_min)) 1099 break; 1100 1101 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, priv->emac_port)) 1102 break; 1103 nxmit++; 1104 } 1105 1106 return nxmit; 1107 } 1108 1109 static int cpsw_get_port_parent_id(struct net_device *ndev, 1110 struct netdev_phys_item_id *ppid) 1111 { 1112 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1113 1114 ppid->id_len = sizeof(cpsw->base_mac); 1115 memcpy(&ppid->id, &cpsw->base_mac, ppid->id_len); 1116 1117 return 0; 1118 } 1119 1120 static const struct net_device_ops cpsw_netdev_ops = { 1121 .ndo_open = cpsw_ndo_open, 1122 .ndo_stop = cpsw_ndo_stop, 1123 .ndo_start_xmit = cpsw_ndo_start_xmit, 1124 .ndo_set_mac_address = cpsw_ndo_set_mac_address, 1125 .ndo_eth_ioctl = cpsw_ndo_ioctl, 1126 .ndo_validate_addr = eth_validate_addr, 1127 .ndo_tx_timeout = cpsw_ndo_tx_timeout, 1128 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode, 1129 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate, 1130 #ifdef CONFIG_NET_POLL_CONTROLLER 1131 .ndo_poll_controller = cpsw_ndo_poll_controller, 1132 #endif 1133 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid, 1134 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid, 1135 .ndo_setup_tc = cpsw_ndo_setup_tc, 1136 .ndo_get_phys_port_name = cpsw_ndo_get_phys_port_name, 1137 .ndo_bpf = cpsw_ndo_bpf, 1138 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit, 1139 .ndo_get_port_parent_id = cpsw_get_port_parent_id, 1140 }; 1141 1142 static void cpsw_get_drvinfo(struct net_device *ndev, 1143 struct ethtool_drvinfo *info) 1144 { 1145 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1146 struct platform_device *pdev; 1147 1148 pdev = to_platform_device(cpsw->dev); 1149 strscpy(info->driver, "cpsw-switch", sizeof(info->driver)); 1150 strscpy(info->version, "2.0", sizeof(info->version)); 1151 strscpy(info->bus_info, pdev->name, sizeof(info->bus_info)); 1152 } 1153 1154 static int cpsw_set_pauseparam(struct net_device *ndev, 1155 struct ethtool_pauseparam *pause) 1156 { 1157 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1158 struct cpsw_priv *priv = netdev_priv(ndev); 1159 int slave_no; 1160 1161 slave_no = cpsw_slave_index(cpsw, priv); 1162 if (!cpsw->slaves[slave_no].phy) 1163 return -EINVAL; 1164 1165 if (!phy_validate_pause(cpsw->slaves[slave_no].phy, pause)) 1166 return -EINVAL; 1167 1168 priv->rx_pause = pause->rx_pause ? true : false; 1169 priv->tx_pause = pause->tx_pause ? true : false; 1170 1171 phy_set_asym_pause(cpsw->slaves[slave_no].phy, 1172 priv->rx_pause, priv->tx_pause); 1173 1174 return 0; 1175 } 1176 1177 static int cpsw_set_channels(struct net_device *ndev, 1178 struct ethtool_channels *chs) 1179 { 1180 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler); 1181 } 1182 1183 static const struct ethtool_ops cpsw_ethtool_ops = { 1184 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS, 1185 .get_drvinfo = cpsw_get_drvinfo, 1186 .get_msglevel = cpsw_get_msglevel, 1187 .set_msglevel = cpsw_set_msglevel, 1188 .get_link = ethtool_op_get_link, 1189 .get_ts_info = cpsw_get_ts_info, 1190 .get_coalesce = cpsw_get_coalesce, 1191 .set_coalesce = cpsw_set_coalesce, 1192 .get_sset_count = cpsw_get_sset_count, 1193 .get_strings = cpsw_get_strings, 1194 .get_ethtool_stats = cpsw_get_ethtool_stats, 1195 .get_pauseparam = cpsw_get_pauseparam, 1196 .set_pauseparam = cpsw_set_pauseparam, 1197 .get_wol = cpsw_get_wol, 1198 .set_wol = cpsw_set_wol, 1199 .get_regs_len = cpsw_get_regs_len, 1200 .get_regs = cpsw_get_regs, 1201 .begin = cpsw_ethtool_op_begin, 1202 .complete = cpsw_ethtool_op_complete, 1203 .get_channels = cpsw_get_channels, 1204 .set_channels = cpsw_set_channels, 1205 .get_link_ksettings = cpsw_get_link_ksettings, 1206 .set_link_ksettings = cpsw_set_link_ksettings, 1207 .get_eee = cpsw_get_eee, 1208 .set_eee = cpsw_set_eee, 1209 .nway_reset = cpsw_nway_reset, 1210 .get_ringparam = cpsw_get_ringparam, 1211 .set_ringparam = cpsw_set_ringparam, 1212 }; 1213 1214 static int cpsw_probe_dt(struct cpsw_common *cpsw) 1215 { 1216 struct device_node *node = cpsw->dev->of_node, *tmp_node, *port_np; 1217 struct cpsw_platform_data *data = &cpsw->data; 1218 struct device *dev = cpsw->dev; 1219 int ret; 1220 u32 prop; 1221 1222 if (!node) 1223 return -EINVAL; 1224 1225 tmp_node = of_get_child_by_name(node, "ethernet-ports"); 1226 if (!tmp_node) 1227 return -ENOENT; 1228 data->slaves = of_get_child_count(tmp_node); 1229 if (data->slaves != CPSW_SLAVE_PORTS_NUM) { 1230 of_node_put(tmp_node); 1231 return -ENOENT; 1232 } 1233 1234 data->active_slave = 0; 1235 data->channels = CPSW_MAX_QUEUES; 1236 data->dual_emac = true; 1237 data->bd_ram_size = CPSW_BD_RAM_SIZE; 1238 data->mac_control = 0; 1239 1240 data->slave_data = devm_kcalloc(dev, CPSW_SLAVE_PORTS_NUM, 1241 sizeof(struct cpsw_slave_data), 1242 GFP_KERNEL); 1243 if (!data->slave_data) { 1244 of_node_put(tmp_node); 1245 return -ENOMEM; 1246 } 1247 1248 /* Populate all the child nodes here... 1249 */ 1250 ret = devm_of_platform_populate(dev); 1251 /* We do not want to force this, as in some cases may not have child */ 1252 if (ret) 1253 dev_warn(dev, "Doesn't have any child node\n"); 1254 1255 for_each_child_of_node(tmp_node, port_np) { 1256 struct cpsw_slave_data *slave_data; 1257 u32 port_id; 1258 1259 ret = of_property_read_u32(port_np, "reg", &port_id); 1260 if (ret < 0) { 1261 dev_err(dev, "%pOF error reading port_id %d\n", 1262 port_np, ret); 1263 goto err_node_put; 1264 } 1265 1266 if (!port_id || port_id > CPSW_SLAVE_PORTS_NUM) { 1267 dev_err(dev, "%pOF has invalid port_id %u\n", 1268 port_np, port_id); 1269 ret = -EINVAL; 1270 goto err_node_put; 1271 } 1272 1273 slave_data = &data->slave_data[port_id - 1]; 1274 1275 slave_data->disabled = !of_device_is_available(port_np); 1276 if (slave_data->disabled) 1277 continue; 1278 1279 slave_data->slave_node = port_np; 1280 slave_data->ifphy = devm_of_phy_get(dev, port_np, NULL); 1281 if (IS_ERR(slave_data->ifphy)) { 1282 ret = PTR_ERR(slave_data->ifphy); 1283 dev_err(dev, "%pOF: Error retrieving port phy: %d\n", 1284 port_np, ret); 1285 goto err_node_put; 1286 } 1287 1288 if (of_phy_is_fixed_link(port_np)) { 1289 ret = of_phy_register_fixed_link(port_np); 1290 if (ret) { 1291 dev_err_probe(dev, ret, "%pOF failed to register fixed-link phy\n", 1292 port_np); 1293 goto err_node_put; 1294 } 1295 slave_data->phy_node = of_node_get(port_np); 1296 } else { 1297 slave_data->phy_node = 1298 of_parse_phandle(port_np, "phy-handle", 0); 1299 } 1300 1301 if (!slave_data->phy_node) { 1302 dev_err(dev, "%pOF no phy found\n", port_np); 1303 ret = -ENODEV; 1304 goto err_node_put; 1305 } 1306 1307 ret = of_get_phy_mode(port_np, &slave_data->phy_if); 1308 if (ret) { 1309 dev_err(dev, "%pOF read phy-mode err %d\n", 1310 port_np, ret); 1311 goto err_node_put; 1312 } 1313 1314 ret = of_get_mac_address(port_np, slave_data->mac_addr); 1315 if (ret) { 1316 ret = ti_cm_get_macid(dev, port_id - 1, 1317 slave_data->mac_addr); 1318 if (ret) 1319 goto err_node_put; 1320 } 1321 1322 if (of_property_read_u32(port_np, "ti,dual-emac-pvid", 1323 &prop)) { 1324 dev_err(dev, "%pOF Missing dual_emac_res_vlan in DT.\n", 1325 port_np); 1326 slave_data->dual_emac_res_vlan = port_id; 1327 dev_err(dev, "%pOF Using %d as Reserved VLAN\n", 1328 port_np, slave_data->dual_emac_res_vlan); 1329 } else { 1330 slave_data->dual_emac_res_vlan = prop; 1331 } 1332 } 1333 1334 of_node_put(tmp_node); 1335 return 0; 1336 1337 err_node_put: 1338 of_node_put(port_np); 1339 of_node_put(tmp_node); 1340 return ret; 1341 } 1342 1343 static void cpsw_remove_dt(struct cpsw_common *cpsw) 1344 { 1345 struct cpsw_platform_data *data = &cpsw->data; 1346 int i = 0; 1347 1348 for (i = 0; i < cpsw->data.slaves; i++) { 1349 struct cpsw_slave_data *slave_data = &data->slave_data[i]; 1350 struct device_node *port_np = slave_data->phy_node; 1351 1352 if (port_np) { 1353 if (of_phy_is_fixed_link(port_np)) 1354 of_phy_deregister_fixed_link(port_np); 1355 1356 of_node_put(port_np); 1357 } 1358 } 1359 } 1360 1361 static int cpsw_create_ports(struct cpsw_common *cpsw) 1362 { 1363 struct cpsw_platform_data *data = &cpsw->data; 1364 struct net_device *ndev, *napi_ndev = NULL; 1365 struct device *dev = cpsw->dev; 1366 struct cpsw_priv *priv; 1367 int ret = 0, i = 0; 1368 1369 for (i = 0; i < cpsw->data.slaves; i++) { 1370 struct cpsw_slave_data *slave_data = &data->slave_data[i]; 1371 1372 if (slave_data->disabled) 1373 continue; 1374 1375 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv), 1376 CPSW_MAX_QUEUES, 1377 CPSW_MAX_QUEUES); 1378 if (!ndev) { 1379 dev_err(dev, "error allocating net_device\n"); 1380 return -ENOMEM; 1381 } 1382 1383 priv = netdev_priv(ndev); 1384 priv->cpsw = cpsw; 1385 priv->ndev = ndev; 1386 priv->dev = dev; 1387 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG); 1388 priv->emac_port = i + 1; 1389 priv->tx_packet_min = CPSW_MIN_PACKET_SIZE; 1390 1391 if (is_valid_ether_addr(slave_data->mac_addr)) { 1392 ether_addr_copy(priv->mac_addr, slave_data->mac_addr); 1393 dev_info(cpsw->dev, "Detected MACID = %pM\n", 1394 priv->mac_addr); 1395 } else { 1396 eth_random_addr(slave_data->mac_addr); 1397 dev_info(cpsw->dev, "Random MACID = %pM\n", 1398 priv->mac_addr); 1399 } 1400 eth_hw_addr_set(ndev, slave_data->mac_addr); 1401 ether_addr_copy(priv->mac_addr, slave_data->mac_addr); 1402 1403 cpsw->slaves[i].ndev = ndev; 1404 1405 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | 1406 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_NETNS_LOCAL | NETIF_F_HW_TC; 1407 1408 ndev->netdev_ops = &cpsw_netdev_ops; 1409 ndev->ethtool_ops = &cpsw_ethtool_ops; 1410 SET_NETDEV_DEV(ndev, dev); 1411 1412 if (!napi_ndev) { 1413 /* CPSW Host port CPDMA interface is shared between 1414 * ports and there is only one TX and one RX IRQs 1415 * available for all possible TX and RX channels 1416 * accordingly. 1417 */ 1418 netif_napi_add(ndev, &cpsw->napi_rx, 1419 cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll); 1420 netif_napi_add_tx(ndev, &cpsw->napi_tx, 1421 cpsw->quirk_irq ? 1422 cpsw_tx_poll : cpsw_tx_mq_poll); 1423 } 1424 1425 napi_ndev = ndev; 1426 } 1427 1428 return ret; 1429 } 1430 1431 static void cpsw_unregister_ports(struct cpsw_common *cpsw) 1432 { 1433 int i = 0; 1434 1435 for (i = 0; i < cpsw->data.slaves; i++) { 1436 if (!cpsw->slaves[i].ndev) 1437 continue; 1438 1439 unregister_netdev(cpsw->slaves[i].ndev); 1440 } 1441 } 1442 1443 static int cpsw_register_ports(struct cpsw_common *cpsw) 1444 { 1445 int ret = 0, i = 0; 1446 1447 for (i = 0; i < cpsw->data.slaves; i++) { 1448 if (!cpsw->slaves[i].ndev) 1449 continue; 1450 1451 /* register the network device */ 1452 ret = register_netdev(cpsw->slaves[i].ndev); 1453 if (ret) { 1454 dev_err(cpsw->dev, 1455 "cpsw: err registering net device%d\n", i); 1456 cpsw->slaves[i].ndev = NULL; 1457 break; 1458 } 1459 } 1460 1461 if (ret) 1462 cpsw_unregister_ports(cpsw); 1463 return ret; 1464 } 1465 1466 bool cpsw_port_dev_check(const struct net_device *ndev) 1467 { 1468 if (ndev->netdev_ops == &cpsw_netdev_ops) { 1469 struct cpsw_common *cpsw = ndev_to_cpsw(ndev); 1470 1471 return !cpsw->data.dual_emac; 1472 } 1473 1474 return false; 1475 } 1476 1477 static void cpsw_port_offload_fwd_mark_update(struct cpsw_common *cpsw) 1478 { 1479 int set_val = 0; 1480 int i; 1481 1482 if (!cpsw->ale_bypass && 1483 (cpsw->br_members == (ALE_PORT_1 | ALE_PORT_2))) 1484 set_val = 1; 1485 1486 dev_dbg(cpsw->dev, "set offload_fwd_mark %d\n", set_val); 1487 1488 for (i = 0; i < cpsw->data.slaves; i++) { 1489 struct net_device *sl_ndev = cpsw->slaves[i].ndev; 1490 struct cpsw_priv *priv = netdev_priv(sl_ndev); 1491 1492 priv->offload_fwd_mark = set_val; 1493 } 1494 } 1495 1496 static int cpsw_netdevice_port_link(struct net_device *ndev, 1497 struct net_device *br_ndev, 1498 struct netlink_ext_ack *extack) 1499 { 1500 struct cpsw_priv *priv = netdev_priv(ndev); 1501 struct cpsw_common *cpsw = priv->cpsw; 1502 int err; 1503 1504 if (!cpsw->br_members) { 1505 cpsw->hw_bridge_dev = br_ndev; 1506 } else { 1507 /* This is adding the port to a second bridge, this is 1508 * unsupported 1509 */ 1510 if (cpsw->hw_bridge_dev != br_ndev) 1511 return -EOPNOTSUPP; 1512 } 1513 1514 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL, 1515 false, extack); 1516 if (err) 1517 return err; 1518 1519 cpsw->br_members |= BIT(priv->emac_port); 1520 1521 cpsw_port_offload_fwd_mark_update(cpsw); 1522 1523 return NOTIFY_DONE; 1524 } 1525 1526 static void cpsw_netdevice_port_unlink(struct net_device *ndev) 1527 { 1528 struct cpsw_priv *priv = netdev_priv(ndev); 1529 struct cpsw_common *cpsw = priv->cpsw; 1530 1531 switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL); 1532 1533 cpsw->br_members &= ~BIT(priv->emac_port); 1534 1535 cpsw_port_offload_fwd_mark_update(cpsw); 1536 1537 if (!cpsw->br_members) 1538 cpsw->hw_bridge_dev = NULL; 1539 } 1540 1541 /* netdev notifier */ 1542 static int cpsw_netdevice_event(struct notifier_block *unused, 1543 unsigned long event, void *ptr) 1544 { 1545 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 1546 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 1547 struct netdev_notifier_changeupper_info *info; 1548 int ret = NOTIFY_DONE; 1549 1550 if (!cpsw_port_dev_check(ndev)) 1551 return NOTIFY_DONE; 1552 1553 switch (event) { 1554 case NETDEV_CHANGEUPPER: 1555 info = ptr; 1556 1557 if (netif_is_bridge_master(info->upper_dev)) { 1558 if (info->linking) 1559 ret = cpsw_netdevice_port_link(ndev, 1560 info->upper_dev, 1561 extack); 1562 else 1563 cpsw_netdevice_port_unlink(ndev); 1564 } 1565 break; 1566 default: 1567 return NOTIFY_DONE; 1568 } 1569 1570 return notifier_from_errno(ret); 1571 } 1572 1573 static struct notifier_block cpsw_netdevice_nb __read_mostly = { 1574 .notifier_call = cpsw_netdevice_event, 1575 }; 1576 1577 static int cpsw_register_notifiers(struct cpsw_common *cpsw) 1578 { 1579 int ret = 0; 1580 1581 ret = register_netdevice_notifier(&cpsw_netdevice_nb); 1582 if (ret) { 1583 dev_err(cpsw->dev, "can't register netdevice notifier\n"); 1584 return ret; 1585 } 1586 1587 ret = cpsw_switchdev_register_notifiers(cpsw); 1588 if (ret) 1589 unregister_netdevice_notifier(&cpsw_netdevice_nb); 1590 1591 return ret; 1592 } 1593 1594 static void cpsw_unregister_notifiers(struct cpsw_common *cpsw) 1595 { 1596 cpsw_switchdev_unregister_notifiers(cpsw); 1597 unregister_netdevice_notifier(&cpsw_netdevice_nb); 1598 } 1599 1600 static const struct devlink_ops cpsw_devlink_ops = { 1601 }; 1602 1603 static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id, 1604 struct devlink_param_gset_ctx *ctx) 1605 { 1606 struct cpsw_devlink *dl_priv = devlink_priv(dl); 1607 struct cpsw_common *cpsw = dl_priv->cpsw; 1608 1609 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id); 1610 1611 if (id != CPSW_DL_PARAM_SWITCH_MODE) 1612 return -EOPNOTSUPP; 1613 1614 ctx->val.vbool = !cpsw->data.dual_emac; 1615 1616 return 0; 1617 } 1618 1619 static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id, 1620 struct devlink_param_gset_ctx *ctx) 1621 { 1622 struct cpsw_devlink *dl_priv = devlink_priv(dl); 1623 struct cpsw_common *cpsw = dl_priv->cpsw; 1624 int vlan = cpsw->data.default_vlan; 1625 bool switch_en = ctx->val.vbool; 1626 bool if_running = false; 1627 int i; 1628 1629 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id); 1630 1631 if (id != CPSW_DL_PARAM_SWITCH_MODE) 1632 return -EOPNOTSUPP; 1633 1634 if (switch_en == !cpsw->data.dual_emac) 1635 return 0; 1636 1637 if (!switch_en && cpsw->br_members) { 1638 dev_err(cpsw->dev, "Remove ports from BR before disabling switch mode\n"); 1639 return -EINVAL; 1640 } 1641 1642 rtnl_lock(); 1643 1644 for (i = 0; i < cpsw->data.slaves; i++) { 1645 struct cpsw_slave *slave = &cpsw->slaves[i]; 1646 struct net_device *sl_ndev = slave->ndev; 1647 1648 if (!sl_ndev || !netif_running(sl_ndev)) 1649 continue; 1650 1651 if_running = true; 1652 } 1653 1654 if (!if_running) { 1655 /* all ndevs are down */ 1656 cpsw->data.dual_emac = !switch_en; 1657 for (i = 0; i < cpsw->data.slaves; i++) { 1658 struct cpsw_slave *slave = &cpsw->slaves[i]; 1659 struct net_device *sl_ndev = slave->ndev; 1660 1661 if (!sl_ndev) 1662 continue; 1663 1664 if (switch_en) 1665 vlan = cpsw->data.default_vlan; 1666 else 1667 vlan = slave->data->dual_emac_res_vlan; 1668 slave->port_vlan = vlan; 1669 } 1670 goto exit; 1671 } 1672 1673 if (switch_en) { 1674 dev_info(cpsw->dev, "Enable switch mode\n"); 1675 1676 /* enable bypass - no forwarding; all traffic goes to Host */ 1677 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1); 1678 1679 /* clean up ALE table */ 1680 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1); 1681 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT); 1682 1683 cpsw_init_host_port_switch(cpsw); 1684 1685 for (i = 0; i < cpsw->data.slaves; i++) { 1686 struct cpsw_slave *slave = &cpsw->slaves[i]; 1687 struct net_device *sl_ndev = slave->ndev; 1688 struct cpsw_priv *priv; 1689 1690 if (!sl_ndev) 1691 continue; 1692 1693 priv = netdev_priv(sl_ndev); 1694 slave->port_vlan = vlan; 1695 WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE_VLAN); 1696 if (netif_running(sl_ndev)) 1697 cpsw_port_add_switch_def_ale_entries(priv, 1698 slave); 1699 } 1700 1701 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0); 1702 cpsw->data.dual_emac = false; 1703 } else { 1704 dev_info(cpsw->dev, "Disable switch mode\n"); 1705 1706 /* enable bypass - no forwarding; all traffic goes to Host */ 1707 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1); 1708 1709 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1); 1710 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT); 1711 1712 cpsw_init_host_port_dual_mac(cpsw); 1713 1714 for (i = 0; i < cpsw->data.slaves; i++) { 1715 struct cpsw_slave *slave = &cpsw->slaves[i]; 1716 struct net_device *sl_ndev = slave->ndev; 1717 struct cpsw_priv *priv; 1718 1719 if (!sl_ndev) 1720 continue; 1721 1722 priv = netdev_priv(slave->ndev); 1723 slave->port_vlan = slave->data->dual_emac_res_vlan; 1724 WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE); 1725 cpsw_port_add_dual_emac_def_ale_entries(priv, slave); 1726 } 1727 1728 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0); 1729 cpsw->data.dual_emac = true; 1730 } 1731 exit: 1732 rtnl_unlock(); 1733 1734 return 0; 1735 } 1736 1737 static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id, 1738 struct devlink_param_gset_ctx *ctx) 1739 { 1740 struct cpsw_devlink *dl_priv = devlink_priv(dl); 1741 struct cpsw_common *cpsw = dl_priv->cpsw; 1742 1743 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id); 1744 1745 switch (id) { 1746 case CPSW_DL_PARAM_ALE_BYPASS: 1747 ctx->val.vbool = cpsw_ale_control_get(cpsw->ale, 0, ALE_BYPASS); 1748 break; 1749 default: 1750 return -EOPNOTSUPP; 1751 } 1752 1753 return 0; 1754 } 1755 1756 static int cpsw_dl_ale_ctrl_set(struct devlink *dl, u32 id, 1757 struct devlink_param_gset_ctx *ctx) 1758 { 1759 struct cpsw_devlink *dl_priv = devlink_priv(dl); 1760 struct cpsw_common *cpsw = dl_priv->cpsw; 1761 int ret = -EOPNOTSUPP; 1762 1763 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id); 1764 1765 switch (id) { 1766 case CPSW_DL_PARAM_ALE_BYPASS: 1767 ret = cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1768 ctx->val.vbool); 1769 if (!ret) { 1770 cpsw->ale_bypass = ctx->val.vbool; 1771 cpsw_port_offload_fwd_mark_update(cpsw); 1772 } 1773 break; 1774 default: 1775 return -EOPNOTSUPP; 1776 } 1777 1778 return 0; 1779 } 1780 1781 static const struct devlink_param cpsw_devlink_params[] = { 1782 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_SWITCH_MODE, 1783 "switch_mode", DEVLINK_PARAM_TYPE_BOOL, 1784 BIT(DEVLINK_PARAM_CMODE_RUNTIME), 1785 cpsw_dl_switch_mode_get, cpsw_dl_switch_mode_set, 1786 NULL), 1787 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_ALE_BYPASS, 1788 "ale_bypass", DEVLINK_PARAM_TYPE_BOOL, 1789 BIT(DEVLINK_PARAM_CMODE_RUNTIME), 1790 cpsw_dl_ale_ctrl_get, cpsw_dl_ale_ctrl_set, NULL), 1791 }; 1792 1793 static int cpsw_register_devlink(struct cpsw_common *cpsw) 1794 { 1795 struct device *dev = cpsw->dev; 1796 struct cpsw_devlink *dl_priv; 1797 int ret = 0; 1798 1799 cpsw->devlink = devlink_alloc(&cpsw_devlink_ops, sizeof(*dl_priv), dev); 1800 if (!cpsw->devlink) 1801 return -ENOMEM; 1802 1803 dl_priv = devlink_priv(cpsw->devlink); 1804 dl_priv->cpsw = cpsw; 1805 1806 ret = devlink_params_register(cpsw->devlink, cpsw_devlink_params, 1807 ARRAY_SIZE(cpsw_devlink_params)); 1808 if (ret) { 1809 dev_err(dev, "DL params reg fail ret:%d\n", ret); 1810 goto dl_unreg; 1811 } 1812 1813 devlink_register(cpsw->devlink); 1814 return ret; 1815 1816 dl_unreg: 1817 devlink_free(cpsw->devlink); 1818 return ret; 1819 } 1820 1821 static void cpsw_unregister_devlink(struct cpsw_common *cpsw) 1822 { 1823 devlink_unregister(cpsw->devlink); 1824 devlink_params_unregister(cpsw->devlink, cpsw_devlink_params, 1825 ARRAY_SIZE(cpsw_devlink_params)); 1826 devlink_free(cpsw->devlink); 1827 } 1828 1829 static const struct of_device_id cpsw_of_mtable[] = { 1830 { .compatible = "ti,cpsw-switch"}, 1831 { .compatible = "ti,am335x-cpsw-switch"}, 1832 { .compatible = "ti,am4372-cpsw-switch"}, 1833 { .compatible = "ti,dra7-cpsw-switch"}, 1834 { /* sentinel */ }, 1835 }; 1836 MODULE_DEVICE_TABLE(of, cpsw_of_mtable); 1837 1838 static const struct soc_device_attribute cpsw_soc_devices[] = { 1839 { .family = "AM33xx", .revision = "ES1.0"}, 1840 { /* sentinel */ } 1841 }; 1842 1843 static int cpsw_probe(struct platform_device *pdev) 1844 { 1845 const struct soc_device_attribute *soc; 1846 struct device *dev = &pdev->dev; 1847 struct cpsw_common *cpsw; 1848 struct resource *ss_res; 1849 struct gpio_descs *mode; 1850 void __iomem *ss_regs; 1851 int ret = 0, ch; 1852 struct clk *clk; 1853 int irq; 1854 1855 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL); 1856 if (!cpsw) 1857 return -ENOMEM; 1858 1859 cpsw_slave_index = cpsw_slave_index_priv; 1860 1861 cpsw->dev = dev; 1862 1863 cpsw->slaves = devm_kcalloc(dev, 1864 CPSW_SLAVE_PORTS_NUM, 1865 sizeof(struct cpsw_slave), 1866 GFP_KERNEL); 1867 if (!cpsw->slaves) 1868 return -ENOMEM; 1869 1870 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW); 1871 if (IS_ERR(mode)) { 1872 ret = PTR_ERR(mode); 1873 dev_err(dev, "gpio request failed, ret %d\n", ret); 1874 return ret; 1875 } 1876 1877 clk = devm_clk_get(dev, "fck"); 1878 if (IS_ERR(clk)) { 1879 ret = PTR_ERR(clk); 1880 dev_err(dev, "fck is not found %d\n", ret); 1881 return ret; 1882 } 1883 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000; 1884 1885 ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res); 1886 if (IS_ERR(ss_regs)) { 1887 ret = PTR_ERR(ss_regs); 1888 return ret; 1889 } 1890 cpsw->regs = ss_regs; 1891 1892 irq = platform_get_irq_byname(pdev, "rx"); 1893 if (irq < 0) 1894 return irq; 1895 cpsw->irqs_table[0] = irq; 1896 1897 irq = platform_get_irq_byname(pdev, "tx"); 1898 if (irq < 0) 1899 return irq; 1900 cpsw->irqs_table[1] = irq; 1901 1902 irq = platform_get_irq_byname(pdev, "misc"); 1903 if (irq <= 0) 1904 return irq; 1905 cpsw->misc_irq = irq; 1906 1907 platform_set_drvdata(pdev, cpsw); 1908 /* This may be required here for child devices. */ 1909 pm_runtime_enable(dev); 1910 1911 /* Need to enable clocks with runtime PM api to access module 1912 * registers 1913 */ 1914 ret = pm_runtime_resume_and_get(dev); 1915 if (ret < 0) { 1916 pm_runtime_disable(dev); 1917 return ret; 1918 } 1919 1920 ret = cpsw_probe_dt(cpsw); 1921 if (ret) 1922 goto clean_dt_ret; 1923 1924 soc = soc_device_match(cpsw_soc_devices); 1925 if (soc) 1926 cpsw->quirk_irq = true; 1927 1928 cpsw->rx_packet_max = rx_packet_max; 1929 cpsw->descs_pool_size = descs_pool_size; 1930 eth_random_addr(cpsw->base_mac); 1931 1932 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout, 1933 (u32 __force)ss_res->start + CPSW2_BD_OFFSET, 1934 descs_pool_size); 1935 if (ret) 1936 goto clean_dt_ret; 1937 1938 cpsw->wr_regs = cpsw->version == CPSW_VERSION_1 ? 1939 ss_regs + CPSW1_WR_OFFSET : 1940 ss_regs + CPSW2_WR_OFFSET; 1941 1942 ch = cpsw->quirk_irq ? 0 : 7; 1943 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0); 1944 if (IS_ERR(cpsw->txv[0].ch)) { 1945 dev_err(dev, "error initializing tx dma channel\n"); 1946 ret = PTR_ERR(cpsw->txv[0].ch); 1947 goto clean_cpts; 1948 } 1949 1950 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1); 1951 if (IS_ERR(cpsw->rxv[0].ch)) { 1952 dev_err(dev, "error initializing rx dma channel\n"); 1953 ret = PTR_ERR(cpsw->rxv[0].ch); 1954 goto clean_cpts; 1955 } 1956 cpsw_split_res(cpsw); 1957 1958 /* setup netdevs */ 1959 ret = cpsw_create_ports(cpsw); 1960 if (ret) 1961 goto clean_unregister_netdev; 1962 1963 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and 1964 * MISC IRQs which are always kept disabled with this driver so 1965 * we will not request them. 1966 * 1967 * If anyone wants to implement support for those, make sure to 1968 * first request and append them to irqs_table array. 1969 */ 1970 1971 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt, 1972 0, dev_name(dev), cpsw); 1973 if (ret < 0) { 1974 dev_err(dev, "error attaching irq (%d)\n", ret); 1975 goto clean_unregister_netdev; 1976 } 1977 1978 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt, 1979 0, dev_name(dev), cpsw); 1980 if (ret < 0) { 1981 dev_err(dev, "error attaching irq (%d)\n", ret); 1982 goto clean_unregister_netdev; 1983 } 1984 1985 if (!cpsw->cpts) 1986 goto skip_cpts; 1987 1988 ret = devm_request_irq(dev, cpsw->misc_irq, cpsw_misc_interrupt, 1989 0, dev_name(&pdev->dev), cpsw); 1990 if (ret < 0) { 1991 dev_err(dev, "error attaching misc irq (%d)\n", ret); 1992 goto clean_unregister_netdev; 1993 } 1994 1995 /* Enable misc CPTS evnt_pend IRQ */ 1996 cpts_set_irqpoll(cpsw->cpts, false); 1997 1998 skip_cpts: 1999 ret = cpsw_register_notifiers(cpsw); 2000 if (ret) 2001 goto clean_unregister_netdev; 2002 2003 ret = cpsw_register_devlink(cpsw); 2004 if (ret) 2005 goto clean_unregister_notifiers; 2006 2007 ret = cpsw_register_ports(cpsw); 2008 if (ret) 2009 goto clean_unregister_notifiers; 2010 2011 dev_notice(dev, "initialized (regs %pa, pool size %d) hw_ver:%08X %d.%d (%d)\n", 2012 &ss_res->start, descs_pool_size, 2013 cpsw->version, CPSW_MAJOR_VERSION(cpsw->version), 2014 CPSW_MINOR_VERSION(cpsw->version), 2015 CPSW_RTL_VERSION(cpsw->version)); 2016 2017 pm_runtime_put(dev); 2018 2019 return 0; 2020 2021 clean_unregister_notifiers: 2022 cpsw_unregister_notifiers(cpsw); 2023 clean_unregister_netdev: 2024 cpsw_unregister_ports(cpsw); 2025 clean_cpts: 2026 cpts_release(cpsw->cpts); 2027 cpdma_ctlr_destroy(cpsw->dma); 2028 clean_dt_ret: 2029 cpsw_remove_dt(cpsw); 2030 pm_runtime_put_sync(dev); 2031 pm_runtime_disable(dev); 2032 return ret; 2033 } 2034 2035 static int cpsw_remove(struct platform_device *pdev) 2036 { 2037 struct cpsw_common *cpsw = platform_get_drvdata(pdev); 2038 int ret; 2039 2040 ret = pm_runtime_resume_and_get(&pdev->dev); 2041 if (ret < 0) 2042 return ret; 2043 2044 cpsw_unregister_notifiers(cpsw); 2045 cpsw_unregister_devlink(cpsw); 2046 cpsw_unregister_ports(cpsw); 2047 2048 cpts_release(cpsw->cpts); 2049 cpdma_ctlr_destroy(cpsw->dma); 2050 cpsw_remove_dt(cpsw); 2051 pm_runtime_put_sync(&pdev->dev); 2052 pm_runtime_disable(&pdev->dev); 2053 return 0; 2054 } 2055 2056 static int __maybe_unused cpsw_suspend(struct device *dev) 2057 { 2058 struct cpsw_common *cpsw = dev_get_drvdata(dev); 2059 int i; 2060 2061 rtnl_lock(); 2062 2063 for (i = 0; i < cpsw->data.slaves; i++) { 2064 struct net_device *ndev = cpsw->slaves[i].ndev; 2065 2066 if (!(ndev && netif_running(ndev))) 2067 continue; 2068 2069 cpsw_ndo_stop(ndev); 2070 } 2071 2072 rtnl_unlock(); 2073 2074 /* Select sleep pin state */ 2075 pinctrl_pm_select_sleep_state(dev); 2076 2077 return 0; 2078 } 2079 2080 static int __maybe_unused cpsw_resume(struct device *dev) 2081 { 2082 struct cpsw_common *cpsw = dev_get_drvdata(dev); 2083 int i; 2084 2085 /* Select default pin state */ 2086 pinctrl_pm_select_default_state(dev); 2087 2088 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */ 2089 rtnl_lock(); 2090 2091 for (i = 0; i < cpsw->data.slaves; i++) { 2092 struct net_device *ndev = cpsw->slaves[i].ndev; 2093 2094 if (!(ndev && netif_running(ndev))) 2095 continue; 2096 2097 cpsw_ndo_open(ndev); 2098 } 2099 2100 rtnl_unlock(); 2101 2102 return 0; 2103 } 2104 2105 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume); 2106 2107 static struct platform_driver cpsw_driver = { 2108 .driver = { 2109 .name = "cpsw-switch", 2110 .pm = &cpsw_pm_ops, 2111 .of_match_table = cpsw_of_mtable, 2112 }, 2113 .probe = cpsw_probe, 2114 .remove = cpsw_remove, 2115 }; 2116 2117 module_platform_driver(cpsw_driver); 2118 2119 MODULE_LICENSE("GPL"); 2120 MODULE_DESCRIPTION("TI CPSW switchdev Ethernet driver"); 2121