drivers/net/ethernet/ti/cpsw_new.c

   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/platform_device.h>
  11 #include <linux/timer.h>
  12 #include <linux/module.h>
  13 #include <linux/irqreturn.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/if_ether.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/net_tstamp.h>
  18 #include <linux/phy.h>
  19 #include <linux/phy/phy.h>
  20 #include <linux/delay.h>
  21 #include <linux/pinctrl/consumer.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/gpio/consumer.h>
  24 #include <linux/of.h>
  25 #include <linux/of_mdio.h>
  26 #include <linux/of_net.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/kmemleak.h>
  30 #include <linux/sys_soc.h>
  31
  32 #include <net/switchdev.h>
  33 #include <net/page_pool/helpers.h>
  34 #include <net/pkt_cls.h>
  35 #include <net/devlink.h>
  36
  37 #include "cpsw.h"
  38 #include "cpsw_ale.h"
  39 #include "cpsw_priv.h"
  40 #include "cpsw_sl.h"
  41 #include "cpsw_switchdev.h"
  42 #include "cpts.h"
  43 #include "davinci_cpdma.h"
  44
  45 #include <net/pkt_sched.h>
  46
  47 static int debug_level;
  48 static int ale_ageout = CPSW_ALE_AGEOUT_DEFAULT;
  49 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
  50 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
  51
  52 struct cpsw_devlink {
  53         struct cpsw_common *cpsw;
  54 };
  55
  56 enum cpsw_devlink_param_id {
  57         CPSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
  58         CPSW_DL_PARAM_SWITCH_MODE,
  59         CPSW_DL_PARAM_ALE_BYPASS,
  60 };
  61
  62 /* struct cpsw_common is not needed, kept here for compatibility
  63  * reasons witrh the old driver
  64  */
  65 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
  66                                  struct cpsw_priv *priv)
  67 {
  68         if (priv->emac_port == HOST_PORT_NUM)
  69                 return -1;
  70
  71         return priv->emac_port - 1;
  72 }
  73
  74 static bool cpsw_is_switch_en(struct cpsw_common *cpsw)
  75 {
  76         return !cpsw->data.dual_emac;
  77 }
  78
  79 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
  80 {
  81         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
  82         bool enable_uni = false;
  83         int i;
  84
  85         if (cpsw_is_switch_en(cpsw))
  86                 return;
  87
  88         /* Enabling promiscuous mode for one interface will be
  89          * common for both the interface as the interface shares
  90          * the same hardware resource.
  91          */
  92         for (i = 0; i < cpsw->data.slaves; i++)
  93                 if (cpsw->slaves[i].ndev &&
  94                     (cpsw->slaves[i].ndev->flags & IFF_PROMISC))
  95                         enable_uni = true;
  96
  97         if (!enable && enable_uni) {
  98                 enable = enable_uni;
  99                 dev_dbg(cpsw->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
 100         }
 101
 102         if (enable) {
 103                 /* Enable unknown unicast, reg/unreg mcast */
 104                 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 105                                      ALE_P0_UNI_FLOOD, 1);
 106
 107                 dev_dbg(cpsw->dev, "promiscuity enabled\n");
 108         } else {
 109                 /* Disable unknown unicast */
 110                 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 111                                      ALE_P0_UNI_FLOOD, 0);
 112                 dev_dbg(cpsw->dev, "promiscuity disabled\n");
 113         }
 114 }
 115
 116 /**
 117  * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
 118  * if it's not deleted
 119  * @ndev: device to sync
 120  * @addr: address to be added or deleted
 121  * @vid: vlan id, if vid < 0 set/unset address for real device
 122  * @add: add address if the flag is set or remove otherwise
 123  */
 124 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
 125                        int vid, int add)
 126 {
 127         struct cpsw_priv *priv = netdev_priv(ndev);
 128         struct cpsw_common *cpsw = priv->cpsw;
 129         int mask, flags, ret, slave_no;
 130
 131         slave_no = cpsw_slave_index(cpsw, priv);
 132         if (vid < 0)
 133                 vid = cpsw->slaves[slave_no].port_vlan;
 134
 135         mask =  ALE_PORT_HOST;
 136         flags = vid ? ALE_VLAN : 0;
 137
 138         if (add)
 139                 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
 140         else
 141                 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
 142
 143         return ret;
 144 }
 145
 146 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
 147 {
 148         struct addr_sync_ctx *sync_ctx = ctx;
 149         struct netdev_hw_addr *ha;
 150         int found = 0, ret = 0;
 151
 152         if (!vdev || !(vdev->flags & IFF_UP))
 153                 return 0;
 154
 155         /* vlan address is relevant if its sync_cnt != 0 */
 156         netdev_for_each_mc_addr(ha, vdev) {
 157                 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
 158                         found = ha->sync_cnt;
 159                         break;
 160                 }
 161         }
 162
 163         if (found)
 164                 sync_ctx->consumed++;
 165
 166         if (sync_ctx->flush) {
 167                 if (!found)
 168                         cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
 169                 return 0;
 170         }
 171
 172         if (found)
 173                 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
 174
 175         return ret;
 176 }
 177
 178 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
 179 {
 180         struct addr_sync_ctx sync_ctx;
 181         int ret;
 182
 183         sync_ctx.consumed = 0;
 184         sync_ctx.addr = addr;
 185         sync_ctx.ndev = ndev;
 186         sync_ctx.flush = 0;
 187
 188         ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
 189         if (sync_ctx.consumed < num && !ret)
 190                 ret = cpsw_set_mc(ndev, addr, -1, 1);
 191
 192         return ret;
 193 }
 194
 195 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
 196 {
 197         struct addr_sync_ctx sync_ctx;
 198
 199         sync_ctx.consumed = 0;
 200         sync_ctx.addr = addr;
 201         sync_ctx.ndev = ndev;
 202         sync_ctx.flush = 1;
 203
 204         vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
 205         if (sync_ctx.consumed == num)
 206                 cpsw_set_mc(ndev, addr, -1, 0);
 207
 208         return 0;
 209 }
 210
 211 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
 212 {
 213         struct addr_sync_ctx *sync_ctx = ctx;
 214         struct netdev_hw_addr *ha;
 215         int found = 0;
 216
 217         if (!vdev || !(vdev->flags & IFF_UP))
 218                 return 0;
 219
 220         /* vlan address is relevant if its sync_cnt != 0 */
 221         netdev_for_each_mc_addr(ha, vdev) {
 222                 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
 223                         found = ha->sync_cnt;
 224                         break;
 225                 }
 226         }
 227
 228         if (!found)
 229                 return 0;
 230
 231         sync_ctx->consumed++;
 232         cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
 233         return 0;
 234 }
 235
 236 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
 237 {
 238         struct addr_sync_ctx sync_ctx;
 239
 240         sync_ctx.addr = addr;
 241         sync_ctx.ndev = ndev;
 242         sync_ctx.consumed = 0;
 243
 244         vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
 245         if (sync_ctx.consumed < num)
 246                 cpsw_set_mc(ndev, addr, -1, 0);
 247
 248         return 0;
 249 }
 250
 251 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
 252 {
 253         struct cpsw_priv *priv = netdev_priv(ndev);
 254         struct cpsw_common *cpsw = priv->cpsw;
 255
 256         if (ndev->flags & IFF_PROMISC) {
 257                 /* Enable promiscuous mode */
 258                 cpsw_set_promiscious(ndev, true);
 259                 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, priv->emac_port);
 260                 return;
 261         }
 262
 263         /* Disable promiscuous mode */
 264         cpsw_set_promiscious(ndev, false);
 265
 266         /* Restore allmulti on vlans if necessary */
 267         cpsw_ale_set_allmulti(cpsw->ale,
 268                               ndev->flags & IFF_ALLMULTI, priv->emac_port);
 269
 270         /* add/remove mcast address either for real netdev or for vlan */
 271         __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
 272                                cpsw_del_mc_addr);
 273 }
 274
 275 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
 276 {
 277         len += CPSW_HEADROOM_NA;
 278         len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 279
 280         return SKB_DATA_ALIGN(len);
 281 }
 282
 283 static void cpsw_rx_handler(void *token, int len, int status)
 284 {
 285         struct page *new_page, *page = token;
 286         void *pa = page_address(page);
 287         int headroom = CPSW_HEADROOM_NA;
 288         struct cpsw_meta_xdp *xmeta;
 289         struct cpsw_common *cpsw;
 290         struct net_device *ndev;
 291         int port, ch, pkt_size;
 292         struct cpsw_priv *priv;
 293         struct page_pool *pool;
 294         struct sk_buff *skb;
 295         struct xdp_buff xdp;
 296         int ret = 0;
 297         dma_addr_t dma;
 298
 299         xmeta = pa + CPSW_XMETA_OFFSET;
 300         cpsw = ndev_to_cpsw(xmeta->ndev);
 301         ndev = xmeta->ndev;
 302         pkt_size = cpsw->rx_packet_max;
 303         ch = xmeta->ch;
 304
 305         if (status >= 0) {
 306                 port = CPDMA_RX_SOURCE_PORT(status);
 307                 if (port)
 308                         ndev = cpsw->slaves[--port].ndev;
 309         }
 310
 311         priv = netdev_priv(ndev);
 312         pool = cpsw->page_pool[ch];
 313
 314         if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
 315                 /* In dual emac mode check for all interfaces */
 316                 if (cpsw->usage_count && status >= 0) {
 317                         /* The packet received is for the interface which
 318                          * is already down and the other interface is up
 319                          * and running, instead of freeing which results
 320                          * in reducing of the number of rx descriptor in
 321                          * DMA engine, requeue page back to cpdma.
 322                          */
 323                         new_page = page;
 324                         goto requeue;
 325                 }
 326
 327                 /* the interface is going down, pages are purged */
 328                 page_pool_recycle_direct(pool, page);
 329                 return;
 330         }
 331
 332         new_page = page_pool_dev_alloc_pages(pool);
 333         if (unlikely(!new_page)) {
 334                 new_page = page;
 335                 ndev->stats.rx_dropped++;
 336                 goto requeue;
 337         }
 338
 339         if (priv->xdp_prog) {
 340                 int size = len;
 341
 342                 xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]);
 343                 if (status & CPDMA_RX_VLAN_ENCAP) {
 344                         headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE;
 345                         size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
 346                 }
 347
 348                 xdp_prepare_buff(&xdp, pa, headroom, size, false);
 349
 350                 ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port, &len);
 351                 if (ret != CPSW_XDP_PASS)
 352                         goto requeue;
 353
 354                 headroom = xdp.data - xdp.data_hard_start;
 355
 356                 /* XDP prog can modify vlan tag, so can't use encap header */
 357                 status &= ~CPDMA_RX_VLAN_ENCAP;
 358         }
 359
 360         /* pass skb to netstack if no XDP prog or returned XDP_PASS */
 361         skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
 362         if (!skb) {
 363                 ndev->stats.rx_dropped++;
 364                 page_pool_recycle_direct(pool, page);
 365                 goto requeue;
 366         }
 367
 368         skb->offload_fwd_mark = priv->offload_fwd_mark;
 369         skb_reserve(skb, headroom);
 370         skb_put(skb, len);
 371         skb->dev = ndev;
 372         if (status & CPDMA_RX_VLAN_ENCAP)
 373                 cpsw_rx_vlan_encap(skb);
 374         if (priv->rx_ts_enabled)
 375                 cpts_rx_timestamp(cpsw->cpts, skb);
 376         skb->protocol = eth_type_trans(skb, ndev);
 377
 378         /* mark skb for recycling */
 379         skb_mark_for_recycle(skb);
 380         netif_receive_skb(skb);
 381
 382         ndev->stats.rx_bytes += len;
 383         ndev->stats.rx_packets++;
 384
 385 requeue:
 386         xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
 387         xmeta->ndev = ndev;
 388         xmeta->ch = ch;
 389
 390         dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA;
 391         ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
 392                                        pkt_size, 0);
 393         if (ret < 0) {
 394                 WARN_ON(ret == -ENOMEM);
 395                 page_pool_recycle_direct(pool, new_page);
 396         }
 397 }
 398
 399 static int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
 400                                    unsigned short vid)
 401 {
 402         struct cpsw_common *cpsw = priv->cpsw;
 403         int unreg_mcast_mask = 0;
 404         int mcast_mask;
 405         u32 port_mask;
 406         int ret;
 407
 408         port_mask = (1 << priv->emac_port) | ALE_PORT_HOST;
 409
 410         mcast_mask = ALE_PORT_HOST;
 411         if (priv->ndev->flags & IFF_ALLMULTI)
 412                 unreg_mcast_mask = mcast_mask;
 413
 414         ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
 415                                 unreg_mcast_mask);
 416         if (ret != 0)
 417                 return ret;
 418
 419         ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 420                                  HOST_PORT_NUM, ALE_VLAN, vid);
 421         if (ret != 0)
 422                 goto clean_vid;
 423
 424         ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 425                                  mcast_mask, ALE_VLAN, vid, 0);
 426         if (ret != 0)
 427                 goto clean_vlan_ucast;
 428         return 0;
 429
 430 clean_vlan_ucast:
 431         cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
 432                            HOST_PORT_NUM, ALE_VLAN, vid);
 433 clean_vid:
 434         cpsw_ale_del_vlan(cpsw->ale, vid, 0);
 435         return ret;
 436 }
 437
 438 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
 439                                     __be16 proto, u16 vid)
 440 {
 441         struct cpsw_priv *priv = netdev_priv(ndev);
 442         struct cpsw_common *cpsw = priv->cpsw;
 443         int ret, i;
 444
 445         if (cpsw_is_switch_en(cpsw)) {
 446                 dev_dbg(cpsw->dev, ".ndo_vlan_rx_add_vid called in switch mode\n");
 447                 return 0;
 448         }
 449
 450         if (vid == cpsw->data.default_vlan)
 451                 return 0;
 452
 453         ret = pm_runtime_resume_and_get(cpsw->dev);
 454         if (ret < 0)
 455                 return ret;
 456
 457         /* In dual EMAC, reserved VLAN id should not be used for
 458          * creating VLAN interfaces as this can break the dual
 459          * EMAC port separation
 460          */
 461         for (i = 0; i < cpsw->data.slaves; i++) {
 462                 if (cpsw->slaves[i].ndev &&
 463                     vid == cpsw->slaves[i].port_vlan) {
 464                         ret = -EINVAL;
 465                         goto err;
 466                 }
 467         }
 468
 469         dev_dbg(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
 470         ret = cpsw_add_vlan_ale_entry(priv, vid);
 471 err:
 472         pm_runtime_put(cpsw->dev);
 473         return ret;
 474 }
 475
 476 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
 477 {
 478         struct cpsw_priv *priv = arg;
 479
 480         if (!vdev || !vid)
 481                 return 0;
 482
 483         cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
 484         return 0;
 485 }
 486
 487 /* restore resources after port reset */
 488 static void cpsw_restore(struct cpsw_priv *priv)
 489 {
 490         struct cpsw_common *cpsw = priv->cpsw;
 491
 492         /* restore vlan configurations */
 493         vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
 494
 495         /* restore MQPRIO offload */
 496         cpsw_mqprio_resume(&cpsw->slaves[priv->emac_port - 1], priv);
 497
 498         /* restore CBS offload */
 499         cpsw_cbs_resume(&cpsw->slaves[priv->emac_port - 1], priv);
 500
 501         cpsw_qos_clsflower_resume(priv);
 502 }
 503
 504 static void cpsw_init_stp_ale_entry(struct cpsw_common *cpsw)
 505 {
 506         static const char stpa[] = {0x01, 0x80, 0xc2, 0x0, 0x0, 0x0};
 507
 508         cpsw_ale_add_mcast(cpsw->ale, stpa,
 509                            ALE_PORT_HOST, ALE_SUPER, 0,
 510                            ALE_MCAST_BLOCK_LEARN_FWD);
 511 }
 512
 513 static void cpsw_init_host_port_switch(struct cpsw_common *cpsw)
 514 {
 515         int vlan = cpsw->data.default_vlan;
 516
 517         writel(CPSW_FIFO_NORMAL_MODE, &cpsw->host_port_regs->tx_in_ctl);
 518
 519         writel(vlan, &cpsw->host_port_regs->port_vlan);
 520
 521         cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
 522                           ALE_ALL_PORTS, ALE_ALL_PORTS,
 523                           ALE_PORT_1 | ALE_PORT_2);
 524
 525         cpsw_init_stp_ale_entry(cpsw);
 526
 527         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
 528         dev_dbg(cpsw->dev, "Set P0_UNI_FLOOD\n");
 529         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
 530 }
 531
 532 static void cpsw_init_host_port_dual_mac(struct cpsw_common *cpsw)
 533 {
 534         int vlan = cpsw->data.default_vlan;
 535
 536         writel(CPSW_FIFO_DUAL_MAC_MODE, &cpsw->host_port_regs->tx_in_ctl);
 537
 538         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
 539         dev_dbg(cpsw->dev, "unset P0_UNI_FLOOD\n");
 540
 541         writel(vlan, &cpsw->host_port_regs->port_vlan);
 542
 543         cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
 544         /* learning make no sense in dual_mac mode */
 545         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
 546 }
 547
 548 static void cpsw_init_host_port(struct cpsw_priv *priv)
 549 {
 550         struct cpsw_common *cpsw = priv->cpsw;
 551         u32 control_reg;
 552
 553         /* soft reset the controller and initialize ale */
 554         soft_reset("cpsw", &cpsw->regs->soft_reset);
 555         cpsw_ale_start(cpsw->ale);
 556
 557         /* switch to vlan unaware mode */
 558         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
 559                              CPSW_ALE_VLAN_AWARE);
 560         control_reg = readl(&cpsw->regs->control);
 561         control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
 562         writel(control_reg, &cpsw->regs->control);
 563
 564         /* setup host port priority mapping */
 565         writel_relaxed(CPDMA_TX_PRIORITY_MAP,
 566                        &cpsw->host_port_regs->cpdma_tx_pri_map);
 567         writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
 568
 569         /* disable priority elevation */
 570         writel_relaxed(0, &cpsw->regs->ptype);
 571
 572         /* enable statistics collection only on all ports */
 573         writel_relaxed(0x7, &cpsw->regs->stat_port_en);
 574
 575         /* Enable internal fifo flow control */
 576         writel(0x7, &cpsw->regs->flow_control);
 577
 578         if (cpsw_is_switch_en(cpsw))
 579                 cpsw_init_host_port_switch(cpsw);
 580         else
 581                 cpsw_init_host_port_dual_mac(cpsw);
 582
 583         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 584                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 585 }
 586
 587 static void cpsw_port_add_dual_emac_def_ale_entries(struct cpsw_priv *priv,
 588                                                     struct cpsw_slave *slave)
 589 {
 590         u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
 591         struct cpsw_common *cpsw = priv->cpsw;
 592         u32 reg;
 593
 594         reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
 595                CPSW2_PORT_VLAN;
 596         slave_write(slave, slave->port_vlan, reg);
 597
 598         cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
 599                           port_mask, port_mask, 0);
 600         cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 601                            ALE_PORT_HOST, ALE_VLAN, slave->port_vlan,
 602                            ALE_MCAST_FWD);
 603         cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 604                            HOST_PORT_NUM, ALE_VLAN |
 605                            ALE_SECURE, slave->port_vlan);
 606         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 607                              ALE_PORT_DROP_UNKNOWN_VLAN, 1);
 608         /* learning make no sense in dual_mac mode */
 609         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 610                              ALE_PORT_NOLEARN, 1);
 611 }
 612
 613 static void cpsw_port_add_switch_def_ale_entries(struct cpsw_priv *priv,
 614                                                  struct cpsw_slave *slave)
 615 {
 616         u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
 617         struct cpsw_common *cpsw = priv->cpsw;
 618         u32 reg;
 619
 620         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 621                              ALE_PORT_DROP_UNKNOWN_VLAN, 0);
 622         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 623                              ALE_PORT_NOLEARN, 0);
 624         /* disabling SA_UPDATE required to make stp work, without this setting
 625          * Host MAC addresses will jump between ports.
 626          * As per TRM MAC address can be defined as unicast supervisory (super)
 627          * by setting both (ALE_BLOCKED | ALE_SECURE) which should prevent
 628          * SA_UPDATE, but HW seems works incorrectly and setting ALE_SECURE
 629          * causes STP packets to be dropped due to ingress filter
 630          *      if (source address found) and (secure) and
 631          *         (receive port number != port_number))
 632          *         then discard the packet
 633          */
 634         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 635                              ALE_PORT_NO_SA_UPDATE, 1);
 636
 637         cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 638                            port_mask, ALE_VLAN, slave->port_vlan,
 639                            ALE_MCAST_FWD_2);
 640         cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 641                            HOST_PORT_NUM, ALE_VLAN, slave->port_vlan);
 642
 643         reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
 644                CPSW2_PORT_VLAN;
 645         slave_write(slave, slave->port_vlan, reg);
 646 }
 647
 648 static void cpsw_adjust_link(struct net_device *ndev)
 649 {
 650         struct cpsw_priv *priv = netdev_priv(ndev);
 651         struct cpsw_common *cpsw = priv->cpsw;
 652         struct cpsw_slave *slave;
 653         struct phy_device *phy;
 654         u32 mac_control = 0;
 655
 656         slave = &cpsw->slaves[priv->emac_port - 1];
 657         phy = slave->phy;
 658
 659         if (!phy)
 660                 return;
 661
 662         if (phy->link) {
 663                 mac_control = CPSW_SL_CTL_GMII_EN;
 664
 665                 if (phy->speed == 1000)
 666                         mac_control |= CPSW_SL_CTL_GIG;
 667                 if (phy->duplex)
 668                         mac_control |= CPSW_SL_CTL_FULLDUPLEX;
 669
 670                 /* set speed_in input in case RMII mode is used in 100Mbps */
 671                 if (phy->speed == 100)
 672                         mac_control |= CPSW_SL_CTL_IFCTL_A;
 673                 /* in band mode only works in 10Mbps RGMII mode */
 674                 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
 675                         mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
 676
 677                 if (priv->rx_pause)
 678                         mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
 679
 680                 if (priv->tx_pause)
 681                         mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
 682
 683                 if (mac_control != slave->mac_control)
 684                         cpsw_sl_ctl_set(slave->mac_sl, mac_control);
 685
 686                 /* enable forwarding */
 687                 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 688                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 689
 690                 netif_tx_wake_all_queues(ndev);
 691
 692                 if (priv->shp_cfg_speed &&
 693                     priv->shp_cfg_speed != slave->phy->speed &&
 694                     !cpsw_shp_is_off(priv))
 695                         dev_warn(priv->dev, "Speed was changed, CBS shaper speeds are changed!");
 696         } else {
 697                 netif_tx_stop_all_queues(ndev);
 698
 699                 mac_control = 0;
 700                 /* disable forwarding */
 701                 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 702                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 703
 704                 cpsw_sl_wait_for_idle(slave->mac_sl, 100);
 705
 706                 cpsw_sl_ctl_reset(slave->mac_sl);
 707         }
 708
 709         if (mac_control != slave->mac_control)
 710                 phy_print_status(phy);
 711
 712         slave->mac_control = mac_control;
 713
 714         if (phy->link && cpsw_need_resplit(cpsw))
 715                 cpsw_split_res(cpsw);
 716 }
 717
 718 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
 719 {
 720         struct cpsw_common *cpsw = priv->cpsw;
 721         struct phy_device *phy;
 722
 723         cpsw_sl_reset(slave->mac_sl, 100);
 724         cpsw_sl_ctl_reset(slave->mac_sl);
 725
 726         /* setup priority mapping */
 727         cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
 728                           RX_PRIORITY_MAPPING);
 729
 730         switch (cpsw->version) {
 731         case CPSW_VERSION_1:
 732                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
 733                 /* Increase RX FIFO size to 5 for supporting fullduplex
 734                  * flow control mode
 735                  */
 736                 slave_write(slave,
 737                             (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
 738                             CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
 739                 break;
 740         case CPSW_VERSION_2:
 741         case CPSW_VERSION_3:
 742         case CPSW_VERSION_4:
 743                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
 744                 /* Increase RX FIFO size to 5 for supporting fullduplex
 745                  * flow control mode
 746                  */
 747                 slave_write(slave,
 748                             (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
 749                             CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
 750                 break;
 751         }
 752
 753         /* setup max packet size, and mac address */
 754         cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
 755                           cpsw->rx_packet_max);
 756         cpsw_set_slave_mac(slave, priv);
 757
 758         slave->mac_control = 0; /* no link yet */
 759
 760         if (cpsw_is_switch_en(cpsw))
 761                 cpsw_port_add_switch_def_ale_entries(priv, slave);
 762         else
 763                 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
 764
 765         if (!slave->data->phy_node)
 766                 dev_err(priv->dev, "no phy found on slave %d\n",
 767                         slave->slave_num);
 768         phy = of_phy_connect(priv->ndev, slave->data->phy_node,
 769                              &cpsw_adjust_link, 0, slave->data->phy_if);
 770         if (!phy) {
 771                 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
 772                         slave->data->phy_node,
 773                         slave->slave_num);
 774                 return;
 775         }
 776
 777         phy->mac_managed_pm = true;
 778
 779         slave->phy = phy;
 780
 781         phy_attached_info(slave->phy);
 782
 783         phy_start(slave->phy);
 784
 785         /* Configure GMII_SEL register */
 786         phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
 787                          slave->data->phy_if);
 788 }
 789
 790 static int cpsw_ndo_stop(struct net_device *ndev)
 791 {
 792         struct cpsw_priv *priv = netdev_priv(ndev);
 793         struct cpsw_common *cpsw = priv->cpsw;
 794         struct cpsw_slave *slave;
 795
 796         cpsw_info(priv, ifdown, "shutting down ndev\n");
 797         slave = &cpsw->slaves[priv->emac_port - 1];
 798         if (slave->phy)
 799                 phy_stop(slave->phy);
 800
 801         netif_tx_stop_all_queues(priv->ndev);
 802
 803         if (slave->phy) {
 804                 phy_disconnect(slave->phy);
 805                 slave->phy = NULL;
 806         }
 807
 808         __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
 809
 810         if (cpsw->usage_count <= 1) {
 811                 napi_disable(&cpsw->napi_rx);
 812                 napi_disable(&cpsw->napi_tx);
 813                 cpts_unregister(cpsw->cpts);
 814                 cpsw_intr_disable(cpsw);
 815                 cpdma_ctlr_stop(cpsw->dma);
 816                 cpsw_ale_stop(cpsw->ale);
 817                 cpsw_destroy_xdp_rxqs(cpsw);
 818         }
 819
 820         if (cpsw_need_resplit(cpsw))
 821                 cpsw_split_res(cpsw);
 822
 823         cpsw->usage_count--;
 824         pm_runtime_put_sync(cpsw->dev);
 825         return 0;
 826 }
 827
 828 static int cpsw_ndo_open(struct net_device *ndev)
 829 {
 830         struct cpsw_priv *priv = netdev_priv(ndev);
 831         struct cpsw_common *cpsw = priv->cpsw;
 832         int ret;
 833
 834         dev_info(priv->dev, "starting ndev. mode: %s\n",
 835                  cpsw_is_switch_en(cpsw) ? "switch" : "dual_mac");
 836         ret = pm_runtime_resume_and_get(cpsw->dev);
 837         if (ret < 0)
 838                 return ret;
 839
 840         /* Notify the stack of the actual queue counts. */
 841         ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
 842         if (ret) {
 843                 dev_err(priv->dev, "cannot set real number of tx queues\n");
 844                 goto pm_cleanup;
 845         }
 846
 847         ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
 848         if (ret) {
 849                 dev_err(priv->dev, "cannot set real number of rx queues\n");
 850                 goto pm_cleanup;
 851         }
 852
 853         /* Initialize host and slave ports */
 854         if (!cpsw->usage_count)
 855                 cpsw_init_host_port(priv);
 856         cpsw_slave_open(&cpsw->slaves[priv->emac_port - 1], priv);
 857
 858         /* initialize shared resources for every ndev */
 859         if (!cpsw->usage_count) {
 860                 /* create rxqs for both infs in dual mac as they use same pool
 861                  * and must be destroyed together when no users.
 862                  */
 863                 ret = cpsw_create_xdp_rxqs(cpsw);
 864                 if (ret < 0)
 865                         goto err_cleanup;
 866
 867                 ret = cpsw_fill_rx_channels(priv);
 868                 if (ret < 0)
 869                         goto err_cleanup;
 870
 871                 if (cpsw->cpts) {
 872                         if (cpts_register(cpsw->cpts))
 873                                 dev_err(priv->dev, "error registering cpts device\n");
 874                         else
 875                                 writel(0x10, &cpsw->wr_regs->misc_en);
 876                 }
 877
 878                 napi_enable(&cpsw->napi_rx);
 879                 napi_enable(&cpsw->napi_tx);
 880
 881                 if (cpsw->tx_irq_disabled) {
 882                         cpsw->tx_irq_disabled = false;
 883                         enable_irq(cpsw->irqs_table[1]);
 884                 }
 885
 886                 if (cpsw->rx_irq_disabled) {
 887                         cpsw->rx_irq_disabled = false;
 888                         enable_irq(cpsw->irqs_table[0]);
 889                 }
 890         }
 891
 892         cpsw_restore(priv);
 893
 894         /* Enable Interrupt pacing if configured */
 895         if (cpsw->coal_intvl != 0) {
 896                 struct ethtool_coalesce coal;
 897
 898                 coal.rx_coalesce_usecs = cpsw->coal_intvl;
 899                 cpsw_set_coalesce(ndev, &coal, NULL, NULL);
 900         }
 901
 902         cpdma_ctlr_start(cpsw->dma);
 903         cpsw_intr_enable(cpsw);
 904         cpsw->usage_count++;
 905
 906         return 0;
 907
 908 err_cleanup:
 909         cpsw_ndo_stop(ndev);
 910
 911 pm_cleanup:
 912         pm_runtime_put_sync(cpsw->dev);
 913         return ret;
 914 }
 915
 916 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
 917                                        struct net_device *ndev)
 918 {
 919         struct cpsw_priv *priv = netdev_priv(ndev);
 920         struct cpsw_common *cpsw = priv->cpsw;
 921         struct cpts *cpts = cpsw->cpts;
 922         struct netdev_queue *txq;
 923         struct cpdma_chan *txch;
 924         int ret, q_idx;
 925
 926         if (skb_put_padto(skb, READ_ONCE(priv->tx_packet_min))) {
 927                 cpsw_err(priv, tx_err, "packet pad failed\n");
 928                 ndev->stats.tx_dropped++;
 929                 return NET_XMIT_DROP;
 930         }
 931
 932         if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
 933             priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
 934                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
 935
 936         q_idx = skb_get_queue_mapping(skb);
 937         if (q_idx >= cpsw->tx_ch_num)
 938                 q_idx = q_idx % cpsw->tx_ch_num;
 939
 940         txch = cpsw->txv[q_idx].ch;
 941         txq = netdev_get_tx_queue(ndev, q_idx);
 942         skb_tx_timestamp(skb);
 943         ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
 944                                 priv->emac_port);
 945         if (unlikely(ret != 0)) {
 946                 cpsw_err(priv, tx_err, "desc submit failed\n");
 947                 goto fail;
 948         }
 949
 950         /* If there is no more tx desc left free then we need to
 951          * tell the kernel to stop sending us tx frames.
 952          */
 953         if (unlikely(!cpdma_check_free_tx_desc(txch))) {
 954                 netif_tx_stop_queue(txq);
 955
 956                 /* Barrier, so that stop_queue visible to other cpus */
 957                 smp_mb__after_atomic();
 958
 959                 if (cpdma_check_free_tx_desc(txch))
 960                         netif_tx_wake_queue(txq);
 961         }
 962
 963         return NETDEV_TX_OK;
 964 fail:
 965         ndev->stats.tx_dropped++;
 966         netif_tx_stop_queue(txq);
 967
 968         /* Barrier, so that stop_queue visible to other cpus */
 969         smp_mb__after_atomic();
 970
 971         if (cpdma_check_free_tx_desc(txch))
 972                 netif_tx_wake_queue(txq);
 973
 974         return NETDEV_TX_BUSY;
 975 }
 976
 977 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
 978 {
 979         struct sockaddr *addr = (struct sockaddr *)p;
 980         struct cpsw_priv *priv = netdev_priv(ndev);
 981         struct cpsw_common *cpsw = priv->cpsw;
 982         int ret, slave_no;
 983         int flags = 0;
 984         u16 vid = 0;
 985
 986         slave_no = cpsw_slave_index(cpsw, priv);
 987         if (!is_valid_ether_addr(addr->sa_data))
 988                 return -EADDRNOTAVAIL;
 989
 990         ret = pm_runtime_resume_and_get(cpsw->dev);
 991         if (ret < 0)
 992                 return ret;
 993
 994         vid = cpsw->slaves[slave_no].port_vlan;
 995         flags = ALE_VLAN | ALE_SECURE;
 996
 997         cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
 998                            flags, vid);
 999         cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
1000                            flags, vid);
1001
1002         ether_addr_copy(priv->mac_addr, addr->sa_data);
1003         eth_hw_addr_set(ndev, priv->mac_addr);
1004         cpsw_set_slave_mac(&cpsw->slaves[slave_no], priv);
1005
1006         pm_runtime_put(cpsw->dev);
1007
1008         return 0;
1009 }
1010
1011 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1012                                      __be16 proto, u16 vid)
1013 {
1014         struct cpsw_priv *priv = netdev_priv(ndev);
1015         struct cpsw_common *cpsw = priv->cpsw;
1016         int ret;
1017         int i;
1018
1019         if (cpsw_is_switch_en(cpsw)) {
1020                 dev_dbg(cpsw->dev, "ndo del vlan is called in switch mode\n");
1021                 return 0;
1022         }
1023
1024         if (vid == cpsw->data.default_vlan)
1025                 return 0;
1026
1027         ret = pm_runtime_resume_and_get(cpsw->dev);
1028         if (ret < 0)
1029                 return ret;
1030
1031         /* reset the return code as pm_runtime_get_sync() can return
1032          * non zero values as well.
1033          */
1034         ret = 0;
1035         for (i = 0; i < cpsw->data.slaves; i++) {
1036                 if (cpsw->slaves[i].ndev &&
1037                     vid == cpsw->slaves[i].port_vlan) {
1038                         ret = -EINVAL;
1039                         goto err;
1040                 }
1041         }
1042
1043         dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1044         ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1045         if (ret)
1046                 dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
1047         ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1048                                  HOST_PORT_NUM, ALE_VLAN, vid);
1049         if (ret)
1050                 dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
1051                         ret);
1052         ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1053                                  0, ALE_VLAN, vid);
1054         if (ret)
1055                 dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
1056                         ret);
1057         cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1058         ret = 0;
1059 err:
1060         pm_runtime_put(cpsw->dev);
1061         return ret;
1062 }
1063
1064 static int cpsw_ndo_get_phys_port_name(struct net_device *ndev, char *name,
1065                                        size_t len)
1066 {
1067         struct cpsw_priv *priv = netdev_priv(ndev);
1068         int err;
1069
1070         err = snprintf(name, len, "p%d", priv->emac_port);
1071
1072         if (err >= len)
1073                 return -EINVAL;
1074
1075         return 0;
1076 }
1077
1078 #ifdef CONFIG_NET_POLL_CONTROLLER
1079 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1080 {
1081         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1082
1083         cpsw_intr_disable(cpsw);
1084         cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1085         cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1086         cpsw_intr_enable(cpsw);
1087 }
1088 #endif
1089
1090 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1091                              struct xdp_frame **frames, u32 flags)
1092 {
1093         struct cpsw_priv *priv = netdev_priv(ndev);
1094         struct xdp_frame *xdpf;
1095         int i, nxmit = 0;
1096
1097         if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1098                 return -EINVAL;
1099
1100         for (i = 0; i < n; i++) {
1101                 xdpf = frames[i];
1102                 if (xdpf->len < READ_ONCE(priv->tx_packet_min))
1103                         break;
1104
1105                 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, priv->emac_port))
1106                         break;
1107                 nxmit++;
1108         }
1109
1110         return nxmit;
1111 }
1112
1113 static int cpsw_get_port_parent_id(struct net_device *ndev,
1114                                    struct netdev_phys_item_id *ppid)
1115 {
1116         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1117
1118         ppid->id_len = sizeof(cpsw->base_mac);
1119         memcpy(&ppid->id, &cpsw->base_mac, ppid->id_len);
1120
1121         return 0;
1122 }
1123
1124 static const struct net_device_ops cpsw_netdev_ops = {
1125         .ndo_open               = cpsw_ndo_open,
1126         .ndo_stop               = cpsw_ndo_stop,
1127         .ndo_start_xmit         = cpsw_ndo_start_xmit,
1128         .ndo_set_mac_address    = cpsw_ndo_set_mac_address,
1129         .ndo_eth_ioctl          = cpsw_ndo_ioctl,
1130         .ndo_validate_addr      = eth_validate_addr,
1131         .ndo_tx_timeout         = cpsw_ndo_tx_timeout,
1132         .ndo_set_rx_mode        = cpsw_ndo_set_rx_mode,
1133         .ndo_set_tx_maxrate     = cpsw_ndo_set_tx_maxrate,
1134 #ifdef CONFIG_NET_POLL_CONTROLLER
1135         .ndo_poll_controller    = cpsw_ndo_poll_controller,
1136 #endif
1137         .ndo_vlan_rx_add_vid    = cpsw_ndo_vlan_rx_add_vid,
1138         .ndo_vlan_rx_kill_vid   = cpsw_ndo_vlan_rx_kill_vid,
1139         .ndo_setup_tc           = cpsw_ndo_setup_tc,
1140         .ndo_get_phys_port_name = cpsw_ndo_get_phys_port_name,
1141         .ndo_bpf                = cpsw_ndo_bpf,
1142         .ndo_xdp_xmit           = cpsw_ndo_xdp_xmit,
1143         .ndo_get_port_parent_id = cpsw_get_port_parent_id,
1144 };
1145
1146 static void cpsw_get_drvinfo(struct net_device *ndev,
1147                              struct ethtool_drvinfo *info)
1148 {
1149         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1150         struct platform_device *pdev;
1151
1152         pdev = to_platform_device(cpsw->dev);
1153         strscpy(info->driver, "cpsw-switch", sizeof(info->driver));
1154         strscpy(info->version, "2.0", sizeof(info->version));
1155         strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1156 }
1157
1158 static int cpsw_set_pauseparam(struct net_device *ndev,
1159                                struct ethtool_pauseparam *pause)
1160 {
1161         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1162         struct cpsw_priv *priv = netdev_priv(ndev);
1163         int slave_no;
1164
1165         slave_no = cpsw_slave_index(cpsw, priv);
1166         if (!cpsw->slaves[slave_no].phy)
1167                 return -EINVAL;
1168
1169         if (!phy_validate_pause(cpsw->slaves[slave_no].phy, pause))
1170                 return -EINVAL;
1171
1172         priv->rx_pause = pause->rx_pause ? true : false;
1173         priv->tx_pause = pause->tx_pause ? true : false;
1174
1175         phy_set_asym_pause(cpsw->slaves[slave_no].phy,
1176                            priv->rx_pause, priv->tx_pause);
1177
1178         return 0;
1179 }
1180
1181 static int cpsw_set_channels(struct net_device *ndev,
1182                              struct ethtool_channels *chs)
1183 {
1184         return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1185 }
1186
1187 static const struct ethtool_ops cpsw_ethtool_ops = {
1188         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1189         .get_drvinfo            = cpsw_get_drvinfo,
1190         .get_msglevel           = cpsw_get_msglevel,
1191         .set_msglevel           = cpsw_set_msglevel,
1192         .get_link               = ethtool_op_get_link,
1193         .get_ts_info            = cpsw_get_ts_info,
1194         .get_coalesce           = cpsw_get_coalesce,
1195         .set_coalesce           = cpsw_set_coalesce,
1196         .get_sset_count         = cpsw_get_sset_count,
1197         .get_strings            = cpsw_get_strings,
1198         .get_ethtool_stats      = cpsw_get_ethtool_stats,
1199         .get_pauseparam         = cpsw_get_pauseparam,
1200         .set_pauseparam         = cpsw_set_pauseparam,
1201         .get_wol                = cpsw_get_wol,
1202         .set_wol                = cpsw_set_wol,
1203         .get_regs_len           = cpsw_get_regs_len,
1204         .get_regs               = cpsw_get_regs,
1205         .begin                  = cpsw_ethtool_op_begin,
1206         .complete               = cpsw_ethtool_op_complete,
1207         .get_channels           = cpsw_get_channels,
1208         .set_channels           = cpsw_set_channels,
1209         .get_link_ksettings     = cpsw_get_link_ksettings,
1210         .set_link_ksettings     = cpsw_set_link_ksettings,
1211         .get_eee                = cpsw_get_eee,
1212         .set_eee                = cpsw_set_eee,
1213         .nway_reset             = cpsw_nway_reset,
1214         .get_ringparam          = cpsw_get_ringparam,
1215         .set_ringparam          = cpsw_set_ringparam,
1216 };
1217
1218 static int cpsw_probe_dt(struct cpsw_common *cpsw)
1219 {
1220         struct device_node *node = cpsw->dev->of_node, *tmp_node, *port_np;
1221         struct cpsw_platform_data *data = &cpsw->data;
1222         struct device *dev = cpsw->dev;
1223         int ret;
1224         u32 prop;
1225
1226         if (!node)
1227                 return -EINVAL;
1228
1229         tmp_node = of_get_child_by_name(node, "ethernet-ports");
1230         if (!tmp_node)
1231                 return -ENOENT;
1232         data->slaves = of_get_child_count(tmp_node);
1233         if (data->slaves != CPSW_SLAVE_PORTS_NUM) {
1234                 of_node_put(tmp_node);
1235                 return -ENOENT;
1236         }
1237
1238         data->active_slave = 0;
1239         data->channels = CPSW_MAX_QUEUES;
1240         data->dual_emac = true;
1241         data->bd_ram_size = CPSW_BD_RAM_SIZE;
1242         data->mac_control = 0;
1243
1244         data->slave_data = devm_kcalloc(dev, CPSW_SLAVE_PORTS_NUM,
1245                                         sizeof(struct cpsw_slave_data),
1246                                         GFP_KERNEL);
1247         if (!data->slave_data) {
1248                 of_node_put(tmp_node);
1249                 return -ENOMEM;
1250         }
1251
1252         /* Populate all the child nodes here...
1253          */
1254         ret = devm_of_platform_populate(dev);
1255         /* We do not want to force this, as in some cases may not have child */
1256         if (ret)
1257                 dev_warn(dev, "Doesn't have any child node\n");
1258
1259         for_each_child_of_node(tmp_node, port_np) {
1260                 struct cpsw_slave_data *slave_data;
1261                 u32 port_id;
1262
1263                 ret = of_property_read_u32(port_np, "reg", &port_id);
1264                 if (ret < 0) {
1265                         dev_err(dev, "%pOF error reading port_id %d\n",
1266                                 port_np, ret);
1267                         goto err_node_put;
1268                 }
1269
1270                 if (!port_id || port_id > CPSW_SLAVE_PORTS_NUM) {
1271                         dev_err(dev, "%pOF has invalid port_id %u\n",
1272                                 port_np, port_id);
1273                         ret = -EINVAL;
1274                         goto err_node_put;
1275                 }
1276
1277                 slave_data = &data->slave_data[port_id - 1];
1278
1279                 slave_data->disabled = !of_device_is_available(port_np);
1280                 if (slave_data->disabled)
1281                         continue;
1282
1283                 slave_data->slave_node = port_np;
1284                 slave_data->ifphy = devm_of_phy_get(dev, port_np, NULL);
1285                 if (IS_ERR(slave_data->ifphy)) {
1286                         ret = PTR_ERR(slave_data->ifphy);
1287                         dev_err(dev, "%pOF: Error retrieving port phy: %d\n",
1288                                 port_np, ret);
1289                         goto err_node_put;
1290                 }
1291
1292                 if (of_phy_is_fixed_link(port_np)) {
1293                         ret = of_phy_register_fixed_link(port_np);
1294                         if (ret) {
1295                                 dev_err_probe(dev, ret, "%pOF failed to register fixed-link phy\n",
1296                                               port_np);
1297                                 goto err_node_put;
1298                         }
1299                         slave_data->phy_node = of_node_get(port_np);
1300                 } else {
1301                         slave_data->phy_node =
1302                                 of_parse_phandle(port_np, "phy-handle", 0);
1303                 }
1304
1305                 if (!slave_data->phy_node) {
1306                         dev_err(dev, "%pOF no phy found\n", port_np);
1307                         ret = -ENODEV;
1308                         goto err_node_put;
1309                 }
1310
1311                 ret = of_get_phy_mode(port_np, &slave_data->phy_if);
1312                 if (ret) {
1313                         dev_err(dev, "%pOF read phy-mode err %d\n",
1314                                 port_np, ret);
1315                         goto err_node_put;
1316                 }
1317
1318                 ret = of_get_mac_address(port_np, slave_data->mac_addr);
1319                 if (ret) {
1320                         ret = ti_cm_get_macid(dev, port_id - 1,
1321                                               slave_data->mac_addr);
1322                         if (ret)
1323                                 goto err_node_put;
1324                 }
1325
1326                 if (of_property_read_u32(port_np, "ti,dual-emac-pvid",
1327                                          &prop)) {
1328                         dev_err(dev, "%pOF Missing dual_emac_res_vlan in DT.\n",
1329                                 port_np);
1330                         slave_data->dual_emac_res_vlan = port_id;
1331                         dev_err(dev, "%pOF Using %d as Reserved VLAN\n",
1332                                 port_np, slave_data->dual_emac_res_vlan);
1333                 } else {
1334                         slave_data->dual_emac_res_vlan = prop;
1335                 }
1336         }
1337
1338         of_node_put(tmp_node);
1339         return 0;
1340
1341 err_node_put:
1342         of_node_put(port_np);
1343         of_node_put(tmp_node);
1344         return ret;
1345 }
1346
1347 static void cpsw_remove_dt(struct cpsw_common *cpsw)
1348 {
1349         struct cpsw_platform_data *data = &cpsw->data;
1350         int i = 0;
1351
1352         for (i = 0; i < cpsw->data.slaves; i++) {
1353                 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1354                 struct device_node *port_np = slave_data->phy_node;
1355
1356                 if (port_np) {
1357                         if (of_phy_is_fixed_link(port_np))
1358                                 of_phy_deregister_fixed_link(port_np);
1359
1360                         of_node_put(port_np);
1361                 }
1362         }
1363 }
1364
1365 static int cpsw_create_ports(struct cpsw_common *cpsw)
1366 {
1367         struct cpsw_platform_data *data = &cpsw->data;
1368         struct net_device *ndev, *napi_ndev = NULL;
1369         struct device *dev = cpsw->dev;
1370         struct cpsw_priv *priv;
1371         int ret = 0, i = 0;
1372
1373         for (i = 0; i < cpsw->data.slaves; i++) {
1374                 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1375
1376                 if (slave_data->disabled)
1377                         continue;
1378
1379                 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1380                                                CPSW_MAX_QUEUES,
1381                                                CPSW_MAX_QUEUES);
1382                 if (!ndev) {
1383                         dev_err(dev, "error allocating net_device\n");
1384                         return -ENOMEM;
1385                 }
1386
1387                 priv = netdev_priv(ndev);
1388                 priv->cpsw = cpsw;
1389                 priv->ndev = ndev;
1390                 priv->dev  = dev;
1391                 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1392                 priv->emac_port = i + 1;
1393                 priv->tx_packet_min = CPSW_MIN_PACKET_SIZE;
1394
1395                 if (is_valid_ether_addr(slave_data->mac_addr)) {
1396                         ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1397                         dev_info(cpsw->dev, "Detected MACID = %pM\n",
1398                                  priv->mac_addr);
1399                 } else {
1400                         eth_random_addr(slave_data->mac_addr);
1401                         dev_info(cpsw->dev, "Random MACID = %pM\n",
1402                                  priv->mac_addr);
1403                 }
1404                 eth_hw_addr_set(ndev, slave_data->mac_addr);
1405                 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1406
1407                 cpsw->slaves[i].ndev = ndev;
1408
1409                 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1410                                   NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_TC;
1411                 ndev->netns_local = true;
1412
1413                 ndev->xdp_features = NETDEV_XDP_ACT_BASIC |
1414                                      NETDEV_XDP_ACT_REDIRECT |
1415                                      NETDEV_XDP_ACT_NDO_XMIT;
1416
1417                 ndev->netdev_ops = &cpsw_netdev_ops;
1418                 ndev->ethtool_ops = &cpsw_ethtool_ops;
1419                 SET_NETDEV_DEV(ndev, dev);
1420
1421                 if (!napi_ndev) {
1422                         /* CPSW Host port CPDMA interface is shared between
1423                          * ports and there is only one TX and one RX IRQs
1424                          * available for all possible TX and RX channels
1425                          * accordingly.
1426                          */
1427                         netif_napi_add(ndev, &cpsw->napi_rx,
1428                                        cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
1429                         netif_napi_add_tx(ndev, &cpsw->napi_tx,
1430                                           cpsw->quirk_irq ?
1431                                           cpsw_tx_poll : cpsw_tx_mq_poll);
1432                 }
1433
1434                 napi_ndev = ndev;
1435         }
1436
1437         return ret;
1438 }
1439
1440 static void cpsw_unregister_ports(struct cpsw_common *cpsw)
1441 {
1442         int i = 0;
1443
1444         for (i = 0; i < cpsw->data.slaves; i++) {
1445                 if (!cpsw->slaves[i].ndev)
1446                         continue;
1447
1448                 unregister_netdev(cpsw->slaves[i].ndev);
1449         }
1450 }
1451
1452 static int cpsw_register_ports(struct cpsw_common *cpsw)
1453 {
1454         int ret = 0, i = 0;
1455
1456         for (i = 0; i < cpsw->data.slaves; i++) {
1457                 if (!cpsw->slaves[i].ndev)
1458                         continue;
1459
1460                 /* register the network device */
1461                 ret = register_netdev(cpsw->slaves[i].ndev);
1462                 if (ret) {
1463                         dev_err(cpsw->dev,
1464                                 "cpsw: err registering net device%d\n", i);
1465                         cpsw->slaves[i].ndev = NULL;
1466                         break;
1467                 }
1468         }
1469
1470         if (ret)
1471                 cpsw_unregister_ports(cpsw);
1472         return ret;
1473 }
1474
1475 bool cpsw_port_dev_check(const struct net_device *ndev)
1476 {
1477         if (ndev->netdev_ops == &cpsw_netdev_ops) {
1478                 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1479
1480                 return !cpsw->data.dual_emac;
1481         }
1482
1483         return false;
1484 }
1485
1486 static void cpsw_port_offload_fwd_mark_update(struct cpsw_common *cpsw)
1487 {
1488         int set_val = 0;
1489         int i;
1490
1491         if (!cpsw->ale_bypass &&
1492             (cpsw->br_members == (ALE_PORT_1 | ALE_PORT_2)))
1493                 set_val = 1;
1494
1495         dev_dbg(cpsw->dev, "set offload_fwd_mark %d\n", set_val);
1496
1497         for (i = 0; i < cpsw->data.slaves; i++) {
1498                 struct net_device *sl_ndev = cpsw->slaves[i].ndev;
1499                 struct cpsw_priv *priv = netdev_priv(sl_ndev);
1500
1501                 priv->offload_fwd_mark = set_val;
1502         }
1503 }
1504
1505 static int cpsw_netdevice_port_link(struct net_device *ndev,
1506                                     struct net_device *br_ndev,
1507                                     struct netlink_ext_ack *extack)
1508 {
1509         struct cpsw_priv *priv = netdev_priv(ndev);
1510         struct cpsw_common *cpsw = priv->cpsw;
1511         int err;
1512
1513         if (!cpsw->br_members) {
1514                 cpsw->hw_bridge_dev = br_ndev;
1515         } else {
1516                 /* This is adding the port to a second bridge, this is
1517                  * unsupported
1518                  */
1519                 if (cpsw->hw_bridge_dev != br_ndev)
1520                         return -EOPNOTSUPP;
1521         }
1522
1523         err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
1524                                             false, extack);
1525         if (err)
1526                 return err;
1527
1528         cpsw->br_members |= BIT(priv->emac_port);
1529
1530         cpsw_port_offload_fwd_mark_update(cpsw);
1531
1532         return NOTIFY_DONE;
1533 }
1534
1535 static void cpsw_netdevice_port_unlink(struct net_device *ndev)
1536 {
1537         struct cpsw_priv *priv = netdev_priv(ndev);
1538         struct cpsw_common *cpsw = priv->cpsw;
1539
1540         switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL);
1541
1542         cpsw->br_members &= ~BIT(priv->emac_port);
1543
1544         cpsw_port_offload_fwd_mark_update(cpsw);
1545
1546         if (!cpsw->br_members)
1547                 cpsw->hw_bridge_dev = NULL;
1548 }
1549
1550 /* netdev notifier */
1551 static int cpsw_netdevice_event(struct notifier_block *unused,
1552                                 unsigned long event, void *ptr)
1553 {
1554         struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
1555         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
1556         struct netdev_notifier_changeupper_info *info;
1557         int ret = NOTIFY_DONE;
1558
1559         if (!cpsw_port_dev_check(ndev))
1560                 return NOTIFY_DONE;
1561
1562         switch (event) {
1563         case NETDEV_CHANGEUPPER:
1564                 info = ptr;
1565
1566                 if (netif_is_bridge_master(info->upper_dev)) {
1567                         if (info->linking)
1568                                 ret = cpsw_netdevice_port_link(ndev,
1569                                                                info->upper_dev,
1570                                                                extack);
1571                         else
1572                                 cpsw_netdevice_port_unlink(ndev);
1573                 }
1574                 break;
1575         default:
1576                 return NOTIFY_DONE;
1577         }
1578
1579         return notifier_from_errno(ret);
1580 }
1581
1582 static struct notifier_block cpsw_netdevice_nb __read_mostly = {
1583         .notifier_call = cpsw_netdevice_event,
1584 };
1585
1586 static int cpsw_register_notifiers(struct cpsw_common *cpsw)
1587 {
1588         int ret = 0;
1589
1590         ret = register_netdevice_notifier(&cpsw_netdevice_nb);
1591         if (ret) {
1592                 dev_err(cpsw->dev, "can't register netdevice notifier\n");
1593                 return ret;
1594         }
1595
1596         ret = cpsw_switchdev_register_notifiers(cpsw);
1597         if (ret)
1598                 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1599
1600         return ret;
1601 }
1602
1603 static void cpsw_unregister_notifiers(struct cpsw_common *cpsw)
1604 {
1605         cpsw_switchdev_unregister_notifiers(cpsw);
1606         unregister_netdevice_notifier(&cpsw_netdevice_nb);
1607 }
1608
1609 static const struct devlink_ops cpsw_devlink_ops = {
1610 };
1611
1612 static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
1613                                    struct devlink_param_gset_ctx *ctx)
1614 {
1615         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1616         struct cpsw_common *cpsw = dl_priv->cpsw;
1617
1618         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1619
1620         if (id != CPSW_DL_PARAM_SWITCH_MODE)
1621                 return  -EOPNOTSUPP;
1622
1623         ctx->val.vbool = !cpsw->data.dual_emac;
1624
1625         return 0;
1626 }
1627
1628 static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
1629                                    struct devlink_param_gset_ctx *ctx,
1630                                    struct netlink_ext_ack *extack)
1631 {
1632         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1633         struct cpsw_common *cpsw = dl_priv->cpsw;
1634         int vlan = cpsw->data.default_vlan;
1635         bool switch_en = ctx->val.vbool;
1636         bool if_running = false;
1637         int i;
1638
1639         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1640
1641         if (id != CPSW_DL_PARAM_SWITCH_MODE)
1642                 return  -EOPNOTSUPP;
1643
1644         if (switch_en == !cpsw->data.dual_emac)
1645                 return 0;
1646
1647         if (!switch_en && cpsw->br_members) {
1648                 dev_err(cpsw->dev, "Remove ports from BR before disabling switch mode\n");
1649                 return -EINVAL;
1650         }
1651
1652         rtnl_lock();
1653
1654         for (i = 0; i < cpsw->data.slaves; i++) {
1655                 struct cpsw_slave *slave = &cpsw->slaves[i];
1656                 struct net_device *sl_ndev = slave->ndev;
1657
1658                 if (!sl_ndev || !netif_running(sl_ndev))
1659                         continue;
1660
1661                 if_running = true;
1662         }
1663
1664         if (!if_running) {
1665                 /* all ndevs are down */
1666                 cpsw->data.dual_emac = !switch_en;
1667                 for (i = 0; i < cpsw->data.slaves; i++) {
1668                         struct cpsw_slave *slave = &cpsw->slaves[i];
1669                         struct net_device *sl_ndev = slave->ndev;
1670
1671                         if (!sl_ndev)
1672                                 continue;
1673
1674                         if (switch_en)
1675                                 vlan = cpsw->data.default_vlan;
1676                         else
1677                                 vlan = slave->data->dual_emac_res_vlan;
1678                         slave->port_vlan = vlan;
1679                 }
1680                 goto exit;
1681         }
1682
1683         if (switch_en) {
1684                 dev_info(cpsw->dev, "Enable switch mode\n");
1685
1686                 /* enable bypass - no forwarding; all traffic goes to Host */
1687                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1688
1689                 /* clean up ALE table */
1690                 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1691                 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1692
1693                 cpsw_init_host_port_switch(cpsw);
1694
1695                 for (i = 0; i < cpsw->data.slaves; i++) {
1696                         struct cpsw_slave *slave = &cpsw->slaves[i];
1697                         struct net_device *sl_ndev = slave->ndev;
1698                         struct cpsw_priv *priv;
1699
1700                         if (!sl_ndev)
1701                                 continue;
1702
1703                         priv = netdev_priv(sl_ndev);
1704                         slave->port_vlan = vlan;
1705                         WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE_VLAN);
1706                         if (netif_running(sl_ndev))
1707                                 cpsw_port_add_switch_def_ale_entries(priv,
1708                                                                      slave);
1709                 }
1710
1711                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1712                 cpsw->data.dual_emac = false;
1713         } else {
1714                 dev_info(cpsw->dev, "Disable switch mode\n");
1715
1716                 /* enable bypass - no forwarding; all traffic goes to Host */
1717                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1718
1719                 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1720                 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1721
1722                 cpsw_init_host_port_dual_mac(cpsw);
1723
1724                 for (i = 0; i < cpsw->data.slaves; i++) {
1725                         struct cpsw_slave *slave = &cpsw->slaves[i];
1726                         struct net_device *sl_ndev = slave->ndev;
1727                         struct cpsw_priv *priv;
1728
1729                         if (!sl_ndev)
1730                                 continue;
1731
1732                         priv = netdev_priv(slave->ndev);
1733                         slave->port_vlan = slave->data->dual_emac_res_vlan;
1734                         WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE);
1735                         cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
1736                 }
1737
1738                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1739                 cpsw->data.dual_emac = true;
1740         }
1741 exit:
1742         rtnl_unlock();
1743
1744         return 0;
1745 }
1746
1747 static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id,
1748                                 struct devlink_param_gset_ctx *ctx)
1749 {
1750         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1751         struct cpsw_common *cpsw = dl_priv->cpsw;
1752
1753         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1754
1755         switch (id) {
1756         case CPSW_DL_PARAM_ALE_BYPASS:
1757                 ctx->val.vbool = cpsw_ale_control_get(cpsw->ale, 0, ALE_BYPASS);
1758                 break;
1759         default:
1760                 return -EOPNOTSUPP;
1761         }
1762
1763         return 0;
1764 }
1765
1766 static int cpsw_dl_ale_ctrl_set(struct devlink *dl, u32 id,
1767                                 struct devlink_param_gset_ctx *ctx,
1768                                 struct netlink_ext_ack *extack)
1769 {
1770         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1771         struct cpsw_common *cpsw = dl_priv->cpsw;
1772         int ret = -EOPNOTSUPP;
1773
1774         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1775
1776         switch (id) {
1777         case CPSW_DL_PARAM_ALE_BYPASS:
1778                 ret = cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS,
1779                                            ctx->val.vbool);
1780                 if (!ret) {
1781                         cpsw->ale_bypass = ctx->val.vbool;
1782                         cpsw_port_offload_fwd_mark_update(cpsw);
1783                 }
1784                 break;
1785         default:
1786                 return -EOPNOTSUPP;
1787         }
1788
1789         return 0;
1790 }
1791
1792 static const struct devlink_param cpsw_devlink_params[] = {
1793         DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_SWITCH_MODE,
1794                              "switch_mode", DEVLINK_PARAM_TYPE_BOOL,
1795                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1796                              cpsw_dl_switch_mode_get, cpsw_dl_switch_mode_set,
1797                              NULL),
1798         DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_ALE_BYPASS,
1799                              "ale_bypass", DEVLINK_PARAM_TYPE_BOOL,
1800                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1801                              cpsw_dl_ale_ctrl_get, cpsw_dl_ale_ctrl_set, NULL),
1802 };
1803
1804 static int cpsw_register_devlink(struct cpsw_common *cpsw)
1805 {
1806         struct device *dev = cpsw->dev;
1807         struct cpsw_devlink *dl_priv;
1808         int ret = 0;
1809
1810         cpsw->devlink = devlink_alloc(&cpsw_devlink_ops, sizeof(*dl_priv), dev);
1811         if (!cpsw->devlink)
1812                 return -ENOMEM;
1813
1814         dl_priv = devlink_priv(cpsw->devlink);
1815         dl_priv->cpsw = cpsw;
1816
1817         ret = devlink_params_register(cpsw->devlink, cpsw_devlink_params,
1818                                       ARRAY_SIZE(cpsw_devlink_params));
1819         if (ret) {
1820                 dev_err(dev, "DL params reg fail ret:%d\n", ret);
1821                 goto dl_unreg;
1822         }
1823
1824         devlink_register(cpsw->devlink);
1825         return ret;
1826
1827 dl_unreg:
1828         devlink_free(cpsw->devlink);
1829         return ret;
1830 }
1831
1832 static void cpsw_unregister_devlink(struct cpsw_common *cpsw)
1833 {
1834         devlink_unregister(cpsw->devlink);
1835         devlink_params_unregister(cpsw->devlink, cpsw_devlink_params,
1836                                   ARRAY_SIZE(cpsw_devlink_params));
1837         devlink_free(cpsw->devlink);
1838 }
1839
1840 static const struct of_device_id cpsw_of_mtable[] = {
1841         { .compatible = "ti,cpsw-switch"},
1842         { .compatible = "ti,am335x-cpsw-switch"},
1843         { .compatible = "ti,am4372-cpsw-switch"},
1844         { .compatible = "ti,dra7-cpsw-switch"},
1845         { /* sentinel */ },
1846 };
1847 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1848
1849 static const struct soc_device_attribute cpsw_soc_devices[] = {
1850         { .family = "AM33xx", .revision = "ES1.0"},
1851         { /* sentinel */ }
1852 };
1853
1854 static int cpsw_probe(struct platform_device *pdev)
1855 {
1856         const struct soc_device_attribute *soc;
1857         struct device *dev = &pdev->dev;
1858         struct cpsw_common *cpsw;
1859         struct resource *ss_res;
1860         struct gpio_descs *mode;
1861         void __iomem *ss_regs;
1862         int ret = 0, ch;
1863         struct clk *clk;
1864         int irq;
1865
1866         cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1867         if (!cpsw)
1868                 return -ENOMEM;
1869
1870         cpsw_slave_index = cpsw_slave_index_priv;
1871
1872         cpsw->dev = dev;
1873
1874         cpsw->slaves = devm_kcalloc(dev,
1875                                     CPSW_SLAVE_PORTS_NUM,
1876                                     sizeof(struct cpsw_slave),
1877                                     GFP_KERNEL);
1878         if (!cpsw->slaves)
1879                 return -ENOMEM;
1880
1881         mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1882         if (IS_ERR(mode)) {
1883                 ret = PTR_ERR(mode);
1884                 dev_err(dev, "gpio request failed, ret %d\n", ret);
1885                 return ret;
1886         }
1887
1888         clk = devm_clk_get(dev, "fck");
1889         if (IS_ERR(clk)) {
1890                 ret = PTR_ERR(clk);
1891                 dev_err(dev, "fck is not found %d\n", ret);
1892                 return ret;
1893         }
1894         cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1895
1896         ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res);
1897         if (IS_ERR(ss_regs)) {
1898                 ret = PTR_ERR(ss_regs);
1899                 return ret;
1900         }
1901         cpsw->regs = ss_regs;
1902
1903         irq = platform_get_irq_byname(pdev, "rx");
1904         if (irq < 0)
1905                 return irq;
1906         cpsw->irqs_table[0] = irq;
1907
1908         irq = platform_get_irq_byname(pdev, "tx");
1909         if (irq < 0)
1910                 return irq;
1911         cpsw->irqs_table[1] = irq;
1912
1913         irq = platform_get_irq_byname(pdev, "misc");
1914         if (irq <= 0)
1915                 return irq;
1916         cpsw->misc_irq = irq;
1917
1918         platform_set_drvdata(pdev, cpsw);
1919         /* This may be required here for child devices. */
1920         pm_runtime_enable(dev);
1921
1922         /* Need to enable clocks with runtime PM api to access module
1923          * registers
1924          */
1925         ret = pm_runtime_resume_and_get(dev);
1926         if (ret < 0) {
1927                 pm_runtime_disable(dev);
1928                 return ret;
1929         }
1930
1931         ret = cpsw_probe_dt(cpsw);
1932         if (ret)
1933                 goto clean_dt_ret;
1934
1935         soc = soc_device_match(cpsw_soc_devices);
1936         if (soc)
1937                 cpsw->quirk_irq = true;
1938
1939         cpsw->rx_packet_max = rx_packet_max;
1940         cpsw->descs_pool_size = descs_pool_size;
1941         eth_random_addr(cpsw->base_mac);
1942
1943         ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1944                                (u32 __force)ss_res->start + CPSW2_BD_OFFSET,
1945                                descs_pool_size);
1946         if (ret)
1947                 goto clean_dt_ret;
1948
1949         cpsw->wr_regs = cpsw->version == CPSW_VERSION_1 ?
1950                         ss_regs + CPSW1_WR_OFFSET :
1951                         ss_regs + CPSW2_WR_OFFSET;
1952
1953         ch = cpsw->quirk_irq ? 0 : 7;
1954         cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1955         if (IS_ERR(cpsw->txv[0].ch)) {
1956                 dev_err(dev, "error initializing tx dma channel\n");
1957                 ret = PTR_ERR(cpsw->txv[0].ch);
1958                 goto clean_cpts;
1959         }
1960
1961         cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1962         if (IS_ERR(cpsw->rxv[0].ch)) {
1963                 dev_err(dev, "error initializing rx dma channel\n");
1964                 ret = PTR_ERR(cpsw->rxv[0].ch);
1965                 goto clean_cpts;
1966         }
1967         cpsw_split_res(cpsw);
1968
1969         /* setup netdevs */
1970         ret = cpsw_create_ports(cpsw);
1971         if (ret)
1972                 goto clean_unregister_netdev;
1973
1974         /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1975          * MISC IRQs which are always kept disabled with this driver so
1976          * we will not request them.
1977          *
1978          * If anyone wants to implement support for those, make sure to
1979          * first request and append them to irqs_table array.
1980          */
1981
1982         ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1983                                0, dev_name(dev), cpsw);
1984         if (ret < 0) {
1985                 dev_err(dev, "error attaching irq (%d)\n", ret);
1986                 goto clean_unregister_netdev;
1987         }
1988
1989         ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1990                                0, dev_name(dev), cpsw);
1991         if (ret < 0) {
1992                 dev_err(dev, "error attaching irq (%d)\n", ret);
1993                 goto clean_unregister_netdev;
1994         }
1995
1996         if (!cpsw->cpts)
1997                 goto skip_cpts;
1998
1999         ret = devm_request_irq(dev, cpsw->misc_irq, cpsw_misc_interrupt,
2000                                0, dev_name(&pdev->dev), cpsw);
2001         if (ret < 0) {
2002                 dev_err(dev, "error attaching misc irq (%d)\n", ret);
2003                 goto clean_unregister_netdev;
2004         }
2005
2006         /* Enable misc CPTS evnt_pend IRQ */
2007         cpts_set_irqpoll(cpsw->cpts, false);
2008
2009 skip_cpts:
2010         ret = cpsw_register_notifiers(cpsw);
2011         if (ret)
2012                 goto clean_unregister_netdev;
2013
2014         ret = cpsw_register_devlink(cpsw);
2015         if (ret)
2016                 goto clean_unregister_notifiers;
2017
2018         ret = cpsw_register_ports(cpsw);
2019         if (ret)
2020                 goto clean_unregister_notifiers;
2021
2022         dev_notice(dev, "initialized (regs %pa, pool size %d) hw_ver:%08X %d.%d (%d)\n",
2023                    &ss_res->start, descs_pool_size,
2024                    cpsw->version, CPSW_MAJOR_VERSION(cpsw->version),
2025                    CPSW_MINOR_VERSION(cpsw->version),
2026                    CPSW_RTL_VERSION(cpsw->version));
2027
2028         pm_runtime_put(dev);
2029
2030         return 0;
2031
2032 clean_unregister_notifiers:
2033         cpsw_unregister_notifiers(cpsw);
2034 clean_unregister_netdev:
2035         cpsw_unregister_ports(cpsw);
2036 clean_cpts:
2037         cpts_release(cpsw->cpts);
2038         cpdma_ctlr_destroy(cpsw->dma);
2039 clean_dt_ret:
2040         cpsw_remove_dt(cpsw);
2041         pm_runtime_put_sync(dev);
2042         pm_runtime_disable(dev);
2043         return ret;
2044 }
2045
2046 static void cpsw_remove(struct platform_device *pdev)
2047 {
2048         struct cpsw_common *cpsw = platform_get_drvdata(pdev);
2049         int ret;
2050
2051         ret = pm_runtime_resume_and_get(&pdev->dev);
2052         if (ret < 0) {
2053                 /* Note, if this error path is taken, we're leaking some
2054                  * resources.
2055                  */
2056                 dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
2057                         ERR_PTR(ret));
2058                 return;
2059         }
2060
2061         cpsw_unregister_notifiers(cpsw);
2062         cpsw_unregister_devlink(cpsw);
2063         cpsw_unregister_ports(cpsw);
2064
2065         cpts_release(cpsw->cpts);
2066         cpdma_ctlr_destroy(cpsw->dma);
2067         cpsw_remove_dt(cpsw);
2068         pm_runtime_put_sync(&pdev->dev);
2069         pm_runtime_disable(&pdev->dev);
2070 }
2071
2072 static int __maybe_unused cpsw_suspend(struct device *dev)
2073 {
2074         struct cpsw_common *cpsw = dev_get_drvdata(dev);
2075         int i;
2076
2077         rtnl_lock();
2078
2079         for (i = 0; i < cpsw->data.slaves; i++) {
2080                 struct net_device *ndev = cpsw->slaves[i].ndev;
2081
2082                 if (!(ndev && netif_running(ndev)))
2083                         continue;
2084
2085                 cpsw_ndo_stop(ndev);
2086         }
2087
2088         rtnl_unlock();
2089
2090         /* Select sleep pin state */
2091         pinctrl_pm_select_sleep_state(dev);
2092
2093         return 0;
2094 }
2095
2096 static int __maybe_unused cpsw_resume(struct device *dev)
2097 {
2098         struct cpsw_common *cpsw = dev_get_drvdata(dev);
2099         int i;
2100
2101         /* Select default pin state */
2102         pinctrl_pm_select_default_state(dev);
2103
2104         /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
2105         rtnl_lock();
2106
2107         for (i = 0; i < cpsw->data.slaves; i++) {
2108                 struct net_device *ndev = cpsw->slaves[i].ndev;
2109
2110                 if (!(ndev && netif_running(ndev)))
2111                         continue;
2112
2113                 cpsw_ndo_open(ndev);
2114         }
2115
2116         rtnl_unlock();
2117
2118         return 0;
2119 }
2120
2121 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2122
2123 static struct platform_driver cpsw_driver = {
2124         .driver = {
2125                 .name    = "cpsw-switch",
2126                 .pm      = &cpsw_pm_ops,
2127                 .of_match_table = cpsw_of_mtable,
2128         },
2129         .probe = cpsw_probe,
2130         .remove = cpsw_remove,
2131 };
2132
2133 module_platform_driver(cpsw_driver);
2134
2135 MODULE_LICENSE("GPL");
2136 MODULE_DESCRIPTION("TI CPSW switchdev Ethernet driver");