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/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/page_pool.h>
  32 #include <net/pkt_cls.h>
  33 #include <net/devlink.h>
  34
  35 #include "cpsw.h"
  36 #include "cpsw_ale.h"
  37 #include "cpsw_priv.h"
  38 #include "cpsw_sl.h"
  39 #include "cpsw_switchdev.h"
  40 #include "cpts.h"
  41 #include "davinci_cpdma.h"
  42
  43 #include <net/pkt_sched.h>
  44
  45 static int debug_level;
  46 static int ale_ageout = CPSW_ALE_AGEOUT_DEFAULT;
  47 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
  48 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
  49
  50 struct cpsw_devlink {
  51         struct cpsw_common *cpsw;
  52 };
  53
  54 enum cpsw_devlink_param_id {
  55         CPSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
  56         CPSW_DL_PARAM_SWITCH_MODE,
  57         CPSW_DL_PARAM_ALE_BYPASS,
  58 };
  59
  60 /* struct cpsw_common is not needed, kept here for compatibility
  61  * reasons witrh the old driver
  62  */
  63 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
  64                                  struct cpsw_priv *priv)
  65 {
  66         if (priv->emac_port == HOST_PORT_NUM)
  67                 return -1;
  68
  69         return priv->emac_port - 1;
  70 }
  71
  72 static bool cpsw_is_switch_en(struct cpsw_common *cpsw)
  73 {
  74         return !cpsw->data.dual_emac;
  75 }
  76
  77 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
  78 {
  79         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
  80         bool enable_uni = false;
  81         int i;
  82
  83         if (cpsw_is_switch_en(cpsw))
  84                 return;
  85
  86         /* Enabling promiscuous mode for one interface will be
  87          * common for both the interface as the interface shares
  88          * the same hardware resource.
  89          */
  90         for (i = 0; i < cpsw->data.slaves; i++)
  91                 if (cpsw->slaves[i].ndev &&
  92                     (cpsw->slaves[i].ndev->flags & IFF_PROMISC))
  93                         enable_uni = true;
  94
  95         if (!enable && enable_uni) {
  96                 enable = enable_uni;
  97                 dev_dbg(cpsw->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
  98         }
  99
 100         if (enable) {
 101                 /* Enable unknown unicast, reg/unreg mcast */
 102                 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 103                                      ALE_P0_UNI_FLOOD, 1);
 104
 105                 dev_dbg(cpsw->dev, "promiscuity enabled\n");
 106         } else {
 107                 /* Disable unknown unicast */
 108                 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 109                                      ALE_P0_UNI_FLOOD, 0);
 110                 dev_dbg(cpsw->dev, "promiscuity disabled\n");
 111         }
 112 }
 113
 114 /**
 115  * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
 116  * if it's not deleted
 117  * @ndev: device to sync
 118  * @addr: address to be added or deleted
 119  * @vid: vlan id, if vid < 0 set/unset address for real device
 120  * @add: add address if the flag is set or remove otherwise
 121  */
 122 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
 123                        int vid, int add)
 124 {
 125         struct cpsw_priv *priv = netdev_priv(ndev);
 126         struct cpsw_common *cpsw = priv->cpsw;
 127         int mask, flags, ret, slave_no;
 128
 129         slave_no = cpsw_slave_index(cpsw, priv);
 130         if (vid < 0)
 131                 vid = cpsw->slaves[slave_no].port_vlan;
 132
 133         mask =  ALE_PORT_HOST;
 134         flags = vid ? ALE_VLAN : 0;
 135
 136         if (add)
 137                 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
 138         else
 139                 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
 140
 141         return ret;
 142 }
 143
 144 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
 145 {
 146         struct addr_sync_ctx *sync_ctx = ctx;
 147         struct netdev_hw_addr *ha;
 148         int found = 0, ret = 0;
 149
 150         if (!vdev || !(vdev->flags & IFF_UP))
 151                 return 0;
 152
 153         /* vlan address is relevant if its sync_cnt != 0 */
 154         netdev_for_each_mc_addr(ha, vdev) {
 155                 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
 156                         found = ha->sync_cnt;
 157                         break;
 158                 }
 159         }
 160
 161         if (found)
 162                 sync_ctx->consumed++;
 163
 164         if (sync_ctx->flush) {
 165                 if (!found)
 166                         cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
 167                 return 0;
 168         }
 169
 170         if (found)
 171                 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
 172
 173         return ret;
 174 }
 175
 176 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
 177 {
 178         struct addr_sync_ctx sync_ctx;
 179         int ret;
 180
 181         sync_ctx.consumed = 0;
 182         sync_ctx.addr = addr;
 183         sync_ctx.ndev = ndev;
 184         sync_ctx.flush = 0;
 185
 186         ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
 187         if (sync_ctx.consumed < num && !ret)
 188                 ret = cpsw_set_mc(ndev, addr, -1, 1);
 189
 190         return ret;
 191 }
 192
 193 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
 194 {
 195         struct addr_sync_ctx sync_ctx;
 196
 197         sync_ctx.consumed = 0;
 198         sync_ctx.addr = addr;
 199         sync_ctx.ndev = ndev;
 200         sync_ctx.flush = 1;
 201
 202         vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
 203         if (sync_ctx.consumed == num)
 204                 cpsw_set_mc(ndev, addr, -1, 0);
 205
 206         return 0;
 207 }
 208
 209 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
 210 {
 211         struct addr_sync_ctx *sync_ctx = ctx;
 212         struct netdev_hw_addr *ha;
 213         int found = 0;
 214
 215         if (!vdev || !(vdev->flags & IFF_UP))
 216                 return 0;
 217
 218         /* vlan address is relevant if its sync_cnt != 0 */
 219         netdev_for_each_mc_addr(ha, vdev) {
 220                 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
 221                         found = ha->sync_cnt;
 222                         break;
 223                 }
 224         }
 225
 226         if (!found)
 227                 return 0;
 228
 229         sync_ctx->consumed++;
 230         cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
 231         return 0;
 232 }
 233
 234 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
 235 {
 236         struct addr_sync_ctx sync_ctx;
 237
 238         sync_ctx.addr = addr;
 239         sync_ctx.ndev = ndev;
 240         sync_ctx.consumed = 0;
 241
 242         vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
 243         if (sync_ctx.consumed < num)
 244                 cpsw_set_mc(ndev, addr, -1, 0);
 245
 246         return 0;
 247 }
 248
 249 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
 250 {
 251         struct cpsw_priv *priv = netdev_priv(ndev);
 252         struct cpsw_common *cpsw = priv->cpsw;
 253
 254         if (ndev->flags & IFF_PROMISC) {
 255                 /* Enable promiscuous mode */
 256                 cpsw_set_promiscious(ndev, true);
 257                 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, priv->emac_port);
 258                 return;
 259         }
 260
 261         /* Disable promiscuous mode */
 262         cpsw_set_promiscious(ndev, false);
 263
 264         /* Restore allmulti on vlans if necessary */
 265         cpsw_ale_set_allmulti(cpsw->ale,
 266                               ndev->flags & IFF_ALLMULTI, priv->emac_port);
 267
 268         /* add/remove mcast address either for real netdev or for vlan */
 269         __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
 270                                cpsw_del_mc_addr);
 271 }
 272
 273 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
 274 {
 275         len += CPSW_HEADROOM;
 276         len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 277
 278         return SKB_DATA_ALIGN(len);
 279 }
 280
 281 static void cpsw_rx_handler(void *token, int len, int status)
 282 {
 283         struct page *new_page, *page = token;
 284         void *pa = page_address(page);
 285         int headroom = CPSW_HEADROOM;
 286         struct cpsw_meta_xdp *xmeta;
 287         struct cpsw_common *cpsw;
 288         struct net_device *ndev;
 289         int port, ch, pkt_size;
 290         struct cpsw_priv *priv;
 291         struct page_pool *pool;
 292         struct sk_buff *skb;
 293         struct xdp_buff xdp;
 294         int ret = 0;
 295         dma_addr_t dma;
 296
 297         xmeta = pa + CPSW_XMETA_OFFSET;
 298         cpsw = ndev_to_cpsw(xmeta->ndev);
 299         ndev = xmeta->ndev;
 300         pkt_size = cpsw->rx_packet_max;
 301         ch = xmeta->ch;
 302
 303         if (status >= 0) {
 304                 port = CPDMA_RX_SOURCE_PORT(status);
 305                 if (port)
 306                         ndev = cpsw->slaves[--port].ndev;
 307         }
 308
 309         priv = netdev_priv(ndev);
 310         pool = cpsw->page_pool[ch];
 311
 312         if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
 313                 /* In dual emac mode check for all interfaces */
 314                 if (cpsw->usage_count && status >= 0) {
 315                         /* The packet received is for the interface which
 316                          * is already down and the other interface is up
 317                          * and running, instead of freeing which results
 318                          * in reducing of the number of rx descriptor in
 319                          * DMA engine, requeue page back to cpdma.
 320                          */
 321                         new_page = page;
 322                         goto requeue;
 323                 }
 324
 325                 /* the interface is going down, pages are purged */
 326                 page_pool_recycle_direct(pool, page);
 327                 return;
 328         }
 329
 330         new_page = page_pool_dev_alloc_pages(pool);
 331         if (unlikely(!new_page)) {
 332                 new_page = page;
 333                 ndev->stats.rx_dropped++;
 334                 goto requeue;
 335         }
 336
 337         if (priv->xdp_prog) {
 338                 if (status & CPDMA_RX_VLAN_ENCAP) {
 339                         xdp.data = pa + CPSW_HEADROOM +
 340                                    CPSW_RX_VLAN_ENCAP_HDR_SIZE;
 341                         xdp.data_end = xdp.data + len -
 342                                        CPSW_RX_VLAN_ENCAP_HDR_SIZE;
 343                 } else {
 344                         xdp.data = pa + CPSW_HEADROOM;
 345                         xdp.data_end = xdp.data + len;
 346                 }
 347
 348                 xdp_set_data_meta_invalid(&xdp);
 349
 350                 xdp.data_hard_start = pa;
 351                 xdp.rxq = &priv->xdp_rxq[ch];
 352                 xdp.frame_sz = PAGE_SIZE;
 353
 354                 ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port);
 355                 if (ret != CPSW_XDP_PASS)
 356                         goto requeue;
 357
 358                 /* XDP prog might have changed packet data and boundaries */
 359                 len = xdp.data_end - xdp.data;
 360                 headroom = xdp.data - xdp.data_hard_start;
 361
 362                 /* XDP prog can modify vlan tag, so can't use encap header */
 363                 status &= ~CPDMA_RX_VLAN_ENCAP;
 364         }
 365
 366         /* pass skb to netstack if no XDP prog or returned XDP_PASS */
 367         skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
 368         if (!skb) {
 369                 ndev->stats.rx_dropped++;
 370                 page_pool_recycle_direct(pool, page);
 371                 goto requeue;
 372         }
 373
 374         skb->offload_fwd_mark = priv->offload_fwd_mark;
 375         skb_reserve(skb, headroom);
 376         skb_put(skb, len);
 377         skb->dev = ndev;
 378         if (status & CPDMA_RX_VLAN_ENCAP)
 379                 cpsw_rx_vlan_encap(skb);
 380         if (priv->rx_ts_enabled)
 381                 cpts_rx_timestamp(cpsw->cpts, skb);
 382         skb->protocol = eth_type_trans(skb, ndev);
 383
 384         /* unmap page as no netstack skb page recycling */
 385         page_pool_release_page(pool, page);
 386         netif_receive_skb(skb);
 387
 388         ndev->stats.rx_bytes += len;
 389         ndev->stats.rx_packets++;
 390
 391 requeue:
 392         xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
 393         xmeta->ndev = ndev;
 394         xmeta->ch = ch;
 395
 396         dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM;
 397         ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
 398                                        pkt_size, 0);
 399         if (ret < 0) {
 400                 WARN_ON(ret == -ENOMEM);
 401                 page_pool_recycle_direct(pool, new_page);
 402         }
 403 }
 404
 405 static int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
 406                                    unsigned short vid)
 407 {
 408         struct cpsw_common *cpsw = priv->cpsw;
 409         int unreg_mcast_mask = 0;
 410         int mcast_mask;
 411         u32 port_mask;
 412         int ret;
 413
 414         port_mask = (1 << priv->emac_port) | ALE_PORT_HOST;
 415
 416         mcast_mask = ALE_PORT_HOST;
 417         if (priv->ndev->flags & IFF_ALLMULTI)
 418                 unreg_mcast_mask = mcast_mask;
 419
 420         ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
 421                                 unreg_mcast_mask);
 422         if (ret != 0)
 423                 return ret;
 424
 425         ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 426                                  HOST_PORT_NUM, ALE_VLAN, vid);
 427         if (ret != 0)
 428                 goto clean_vid;
 429
 430         ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 431                                  mcast_mask, ALE_VLAN, vid, 0);
 432         if (ret != 0)
 433                 goto clean_vlan_ucast;
 434         return 0;
 435
 436 clean_vlan_ucast:
 437         cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
 438                            HOST_PORT_NUM, ALE_VLAN, vid);
 439 clean_vid:
 440         cpsw_ale_del_vlan(cpsw->ale, vid, 0);
 441         return ret;
 442 }
 443
 444 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
 445                                     __be16 proto, u16 vid)
 446 {
 447         struct cpsw_priv *priv = netdev_priv(ndev);
 448         struct cpsw_common *cpsw = priv->cpsw;
 449         int ret, i;
 450
 451         if (cpsw_is_switch_en(cpsw)) {
 452                 dev_dbg(cpsw->dev, ".ndo_vlan_rx_add_vid called in switch mode\n");
 453                 return 0;
 454         }
 455
 456         if (vid == cpsw->data.default_vlan)
 457                 return 0;
 458
 459         ret = pm_runtime_get_sync(cpsw->dev);
 460         if (ret < 0) {
 461                 pm_runtime_put_noidle(cpsw->dev);
 462                 return ret;
 463         }
 464
 465         /* In dual EMAC, reserved VLAN id should not be used for
 466          * creating VLAN interfaces as this can break the dual
 467          * EMAC port separation
 468          */
 469         for (i = 0; i < cpsw->data.slaves; i++) {
 470                 if (cpsw->slaves[i].ndev &&
 471                     vid == cpsw->slaves[i].port_vlan) {
 472                         ret = -EINVAL;
 473                         goto err;
 474                 }
 475         }
 476
 477         dev_dbg(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
 478         ret = cpsw_add_vlan_ale_entry(priv, vid);
 479 err:
 480         pm_runtime_put(cpsw->dev);
 481         return ret;
 482 }
 483
 484 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
 485 {
 486         struct cpsw_priv *priv = arg;
 487
 488         if (!vdev || !vid)
 489                 return 0;
 490
 491         cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
 492         return 0;
 493 }
 494
 495 /* restore resources after port reset */
 496 static void cpsw_restore(struct cpsw_priv *priv)
 497 {
 498         struct cpsw_common *cpsw = priv->cpsw;
 499
 500         /* restore vlan configurations */
 501         vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
 502
 503         /* restore MQPRIO offload */
 504         cpsw_mqprio_resume(&cpsw->slaves[priv->emac_port - 1], priv);
 505
 506         /* restore CBS offload */
 507         cpsw_cbs_resume(&cpsw->slaves[priv->emac_port - 1], priv);
 508 }
 509
 510 static void cpsw_init_stp_ale_entry(struct cpsw_common *cpsw)
 511 {
 512         char stpa[] = {0x01, 0x80, 0xc2, 0x0, 0x0, 0x0};
 513
 514         cpsw_ale_add_mcast(cpsw->ale, stpa,
 515                            ALE_PORT_HOST, ALE_SUPER, 0,
 516                            ALE_MCAST_BLOCK_LEARN_FWD);
 517 }
 518
 519 static void cpsw_init_host_port_switch(struct cpsw_common *cpsw)
 520 {
 521         int vlan = cpsw->data.default_vlan;
 522
 523         writel(CPSW_FIFO_NORMAL_MODE, &cpsw->host_port_regs->tx_in_ctl);
 524
 525         writel(vlan, &cpsw->host_port_regs->port_vlan);
 526
 527         cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
 528                           ALE_ALL_PORTS, ALE_ALL_PORTS,
 529                           ALE_PORT_1 | ALE_PORT_2);
 530
 531         cpsw_init_stp_ale_entry(cpsw);
 532
 533         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
 534         dev_dbg(cpsw->dev, "Set P0_UNI_FLOOD\n");
 535         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
 536 }
 537
 538 static void cpsw_init_host_port_dual_mac(struct cpsw_common *cpsw)
 539 {
 540         int vlan = cpsw->data.default_vlan;
 541
 542         writel(CPSW_FIFO_DUAL_MAC_MODE, &cpsw->host_port_regs->tx_in_ctl);
 543
 544         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
 545         dev_dbg(cpsw->dev, "unset P0_UNI_FLOOD\n");
 546
 547         writel(vlan, &cpsw->host_port_regs->port_vlan);
 548
 549         cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
 550         /* learning make no sense in dual_mac mode */
 551         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
 552 }
 553
 554 static void cpsw_init_host_port(struct cpsw_priv *priv)
 555 {
 556         struct cpsw_common *cpsw = priv->cpsw;
 557         u32 control_reg;
 558
 559         /* soft reset the controller and initialize ale */
 560         soft_reset("cpsw", &cpsw->regs->soft_reset);
 561         cpsw_ale_start(cpsw->ale);
 562
 563         /* switch to vlan unaware mode */
 564         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
 565                              CPSW_ALE_VLAN_AWARE);
 566         control_reg = readl(&cpsw->regs->control);
 567         control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
 568         writel(control_reg, &cpsw->regs->control);
 569
 570         /* setup host port priority mapping */
 571         writel_relaxed(CPDMA_TX_PRIORITY_MAP,
 572                        &cpsw->host_port_regs->cpdma_tx_pri_map);
 573         writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
 574
 575         /* disable priority elevation */
 576         writel_relaxed(0, &cpsw->regs->ptype);
 577
 578         /* enable statistics collection only on all ports */
 579         writel_relaxed(0x7, &cpsw->regs->stat_port_en);
 580
 581         /* Enable internal fifo flow control */
 582         writel(0x7, &cpsw->regs->flow_control);
 583
 584         if (cpsw_is_switch_en(cpsw))
 585                 cpsw_init_host_port_switch(cpsw);
 586         else
 587                 cpsw_init_host_port_dual_mac(cpsw);
 588
 589         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
 590                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 591 }
 592
 593 static void cpsw_port_add_dual_emac_def_ale_entries(struct cpsw_priv *priv,
 594                                                     struct cpsw_slave *slave)
 595 {
 596         u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
 597         struct cpsw_common *cpsw = priv->cpsw;
 598         u32 reg;
 599
 600         reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
 601                CPSW2_PORT_VLAN;
 602         slave_write(slave, slave->port_vlan, reg);
 603
 604         cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
 605                           port_mask, port_mask, 0);
 606         cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 607                            ALE_PORT_HOST, ALE_VLAN, slave->port_vlan,
 608                            ALE_MCAST_FWD);
 609         cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 610                            HOST_PORT_NUM, ALE_VLAN |
 611                            ALE_SECURE, slave->port_vlan);
 612         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 613                              ALE_PORT_DROP_UNKNOWN_VLAN, 1);
 614         /* learning make no sense in dual_mac mode */
 615         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 616                              ALE_PORT_NOLEARN, 1);
 617 }
 618
 619 static void cpsw_port_add_switch_def_ale_entries(struct cpsw_priv *priv,
 620                                                  struct cpsw_slave *slave)
 621 {
 622         u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
 623         struct cpsw_common *cpsw = priv->cpsw;
 624         u32 reg;
 625
 626         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 627                              ALE_PORT_DROP_UNKNOWN_VLAN, 0);
 628         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 629                              ALE_PORT_NOLEARN, 0);
 630         /* disabling SA_UPDATE required to make stp work, without this setting
 631          * Host MAC addresses will jump between ports.
 632          * As per TRM MAC address can be defined as unicast supervisory (super)
 633          * by setting both (ALE_BLOCKED | ALE_SECURE) which should prevent
 634          * SA_UPDATE, but HW seems works incorrectly and setting ALE_SECURE
 635          * causes STP packets to be dropped due to ingress filter
 636          *      if (source address found) and (secure) and
 637          *         (receive port number != port_number))
 638          *         then discard the packet
 639          */
 640         cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 641                              ALE_PORT_NO_SA_UPDATE, 1);
 642
 643         cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
 644                            port_mask, ALE_VLAN, slave->port_vlan,
 645                            ALE_MCAST_FWD_2);
 646         cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
 647                            HOST_PORT_NUM, ALE_VLAN, slave->port_vlan);
 648
 649         reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
 650                CPSW2_PORT_VLAN;
 651         slave_write(slave, slave->port_vlan, reg);
 652 }
 653
 654 static void cpsw_adjust_link(struct net_device *ndev)
 655 {
 656         struct cpsw_priv *priv = netdev_priv(ndev);
 657         struct cpsw_common *cpsw = priv->cpsw;
 658         struct cpsw_slave *slave;
 659         struct phy_device *phy;
 660         u32 mac_control = 0;
 661
 662         slave = &cpsw->slaves[priv->emac_port - 1];
 663         phy = slave->phy;
 664
 665         if (!phy)
 666                 return;
 667
 668         if (phy->link) {
 669                 mac_control = CPSW_SL_CTL_GMII_EN;
 670
 671                 if (phy->speed == 1000)
 672                         mac_control |= CPSW_SL_CTL_GIG;
 673                 if (phy->duplex)
 674                         mac_control |= CPSW_SL_CTL_FULLDUPLEX;
 675
 676                 /* set speed_in input in case RMII mode is used in 100Mbps */
 677                 if (phy->speed == 100)
 678                         mac_control |= CPSW_SL_CTL_IFCTL_A;
 679                 /* in band mode only works in 10Mbps RGMII mode */
 680                 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
 681                         mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
 682
 683                 if (priv->rx_pause)
 684                         mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
 685
 686                 if (priv->tx_pause)
 687                         mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
 688
 689                 if (mac_control != slave->mac_control)
 690                         cpsw_sl_ctl_set(slave->mac_sl, mac_control);
 691
 692                 /* enable forwarding */
 693                 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 694                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 695
 696                 netif_tx_wake_all_queues(ndev);
 697
 698                 if (priv->shp_cfg_speed &&
 699                     priv->shp_cfg_speed != slave->phy->speed &&
 700                     !cpsw_shp_is_off(priv))
 701                         dev_warn(priv->dev, "Speed was changed, CBS shaper speeds are changed!");
 702         } else {
 703                 netif_tx_stop_all_queues(ndev);
 704
 705                 mac_control = 0;
 706                 /* disable forwarding */
 707                 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
 708                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 709
 710                 cpsw_sl_wait_for_idle(slave->mac_sl, 100);
 711
 712                 cpsw_sl_ctl_reset(slave->mac_sl);
 713         }
 714
 715         if (mac_control != slave->mac_control)
 716                 phy_print_status(phy);
 717
 718         slave->mac_control = mac_control;
 719
 720         if (phy->link && cpsw_need_resplit(cpsw))
 721                 cpsw_split_res(cpsw);
 722 }
 723
 724 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
 725 {
 726         struct cpsw_common *cpsw = priv->cpsw;
 727         struct phy_device *phy;
 728
 729         cpsw_sl_reset(slave->mac_sl, 100);
 730         cpsw_sl_ctl_reset(slave->mac_sl);
 731
 732         /* setup priority mapping */
 733         cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
 734                           RX_PRIORITY_MAPPING);
 735
 736         switch (cpsw->version) {
 737         case CPSW_VERSION_1:
 738                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
 739                 /* Increase RX FIFO size to 5 for supporting fullduplex
 740                  * flow control mode
 741                  */
 742                 slave_write(slave,
 743                             (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
 744                             CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
 745                 break;
 746         case CPSW_VERSION_2:
 747         case CPSW_VERSION_3:
 748         case CPSW_VERSION_4:
 749                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
 750                 /* Increase RX FIFO size to 5 for supporting fullduplex
 751                  * flow control mode
 752                  */
 753                 slave_write(slave,
 754                             (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
 755                             CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
 756                 break;
 757         }
 758
 759         /* setup max packet size, and mac address */
 760         cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
 761                           cpsw->rx_packet_max);
 762         cpsw_set_slave_mac(slave, priv);
 763
 764         slave->mac_control = 0; /* no link yet */
 765
 766         if (cpsw_is_switch_en(cpsw))
 767                 cpsw_port_add_switch_def_ale_entries(priv, slave);
 768         else
 769                 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
 770
 771         if (!slave->data->phy_node)
 772                 dev_err(priv->dev, "no phy found on slave %d\n",
 773                         slave->slave_num);
 774         phy = of_phy_connect(priv->ndev, slave->data->phy_node,
 775                              &cpsw_adjust_link, 0, slave->data->phy_if);
 776         if (!phy) {
 777                 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
 778                         slave->data->phy_node,
 779                         slave->slave_num);
 780                 return;
 781         }
 782         slave->phy = phy;
 783
 784         phy_attached_info(slave->phy);
 785
 786         phy_start(slave->phy);
 787
 788         /* Configure GMII_SEL register */
 789         phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
 790                          slave->data->phy_if);
 791 }
 792
 793 static int cpsw_ndo_stop(struct net_device *ndev)
 794 {
 795         struct cpsw_priv *priv = netdev_priv(ndev);
 796         struct cpsw_common *cpsw = priv->cpsw;
 797         struct cpsw_slave *slave;
 798
 799         cpsw_info(priv, ifdown, "shutting down ndev\n");
 800         slave = &cpsw->slaves[priv->emac_port - 1];
 801         if (slave->phy)
 802                 phy_stop(slave->phy);
 803
 804         netif_tx_stop_all_queues(priv->ndev);
 805
 806         if (slave->phy) {
 807                 phy_disconnect(slave->phy);
 808                 slave->phy = NULL;
 809         }
 810
 811         __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
 812
 813         if (cpsw->usage_count <= 1) {
 814                 napi_disable(&cpsw->napi_rx);
 815                 napi_disable(&cpsw->napi_tx);
 816                 cpts_unregister(cpsw->cpts);
 817                 cpsw_intr_disable(cpsw);
 818                 cpdma_ctlr_stop(cpsw->dma);
 819                 cpsw_ale_stop(cpsw->ale);
 820                 cpsw_destroy_xdp_rxqs(cpsw);
 821         }
 822
 823         if (cpsw_need_resplit(cpsw))
 824                 cpsw_split_res(cpsw);
 825
 826         cpsw->usage_count--;
 827         pm_runtime_put_sync(cpsw->dev);
 828         return 0;
 829 }
 830
 831 static int cpsw_ndo_open(struct net_device *ndev)
 832 {
 833         struct cpsw_priv *priv = netdev_priv(ndev);
 834         struct cpsw_common *cpsw = priv->cpsw;
 835         int ret;
 836
 837         dev_info(priv->dev, "starting ndev. mode: %s\n",
 838                  cpsw_is_switch_en(cpsw) ? "switch" : "dual_mac");
 839         ret = pm_runtime_get_sync(cpsw->dev);
 840         if (ret < 0) {
 841                 pm_runtime_put_noidle(cpsw->dev);
 842                 return ret;
 843         }
 844
 845         /* Notify the stack of the actual queue counts. */
 846         ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
 847         if (ret) {
 848                 dev_err(priv->dev, "cannot set real number of tx queues\n");
 849                 goto pm_cleanup;
 850         }
 851
 852         ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
 853         if (ret) {
 854                 dev_err(priv->dev, "cannot set real number of rx queues\n");
 855                 goto pm_cleanup;
 856         }
 857
 858         /* Initialize host and slave ports */
 859         if (!cpsw->usage_count)
 860                 cpsw_init_host_port(priv);
 861         cpsw_slave_open(&cpsw->slaves[priv->emac_port - 1], priv);
 862
 863         /* initialize shared resources for every ndev */
 864         if (!cpsw->usage_count) {
 865                 /* create rxqs for both infs in dual mac as they use same pool
 866                  * and must be destroyed together when no users.
 867                  */
 868                 ret = cpsw_create_xdp_rxqs(cpsw);
 869                 if (ret < 0)
 870                         goto err_cleanup;
 871
 872                 ret = cpsw_fill_rx_channels(priv);
 873                 if (ret < 0)
 874                         goto err_cleanup;
 875
 876                 if (cpsw->cpts) {
 877                         if (cpts_register(cpsw->cpts))
 878                                 dev_err(priv->dev, "error registering cpts device\n");
 879                         else
 880                                 writel(0x10, &cpsw->wr_regs->misc_en);
 881                 }
 882
 883                 napi_enable(&cpsw->napi_rx);
 884                 napi_enable(&cpsw->napi_tx);
 885
 886                 if (cpsw->tx_irq_disabled) {
 887                         cpsw->tx_irq_disabled = false;
 888                         enable_irq(cpsw->irqs_table[1]);
 889                 }
 890
 891                 if (cpsw->rx_irq_disabled) {
 892                         cpsw->rx_irq_disabled = false;
 893                         enable_irq(cpsw->irqs_table[0]);
 894                 }
 895         }
 896
 897         cpsw_restore(priv);
 898
 899         /* Enable Interrupt pacing if configured */
 900         if (cpsw->coal_intvl != 0) {
 901                 struct ethtool_coalesce coal;
 902
 903                 coal.rx_coalesce_usecs = cpsw->coal_intvl;
 904                 cpsw_set_coalesce(ndev, &coal);
 905         }
 906
 907         cpdma_ctlr_start(cpsw->dma);
 908         cpsw_intr_enable(cpsw);
 909         cpsw->usage_count++;
 910
 911         return 0;
 912
 913 err_cleanup:
 914         cpsw_ndo_stop(ndev);
 915
 916 pm_cleanup:
 917         pm_runtime_put_sync(cpsw->dev);
 918         return ret;
 919 }
 920
 921 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
 922                                        struct net_device *ndev)
 923 {
 924         struct cpsw_priv *priv = netdev_priv(ndev);
 925         struct cpsw_common *cpsw = priv->cpsw;
 926         struct cpts *cpts = cpsw->cpts;
 927         struct netdev_queue *txq;
 928         struct cpdma_chan *txch;
 929         int ret, q_idx;
 930
 931         if (skb_put_padto(skb, READ_ONCE(priv->tx_packet_min))) {
 932                 cpsw_err(priv, tx_err, "packet pad failed\n");
 933                 ndev->stats.tx_dropped++;
 934                 return NET_XMIT_DROP;
 935         }
 936
 937         if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
 938             priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
 939                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
 940
 941         q_idx = skb_get_queue_mapping(skb);
 942         if (q_idx >= cpsw->tx_ch_num)
 943                 q_idx = q_idx % cpsw->tx_ch_num;
 944
 945         txch = cpsw->txv[q_idx].ch;
 946         txq = netdev_get_tx_queue(ndev, q_idx);
 947         skb_tx_timestamp(skb);
 948         ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
 949                                 priv->emac_port);
 950         if (unlikely(ret != 0)) {
 951                 cpsw_err(priv, tx_err, "desc submit failed\n");
 952                 goto fail;
 953         }
 954
 955         /* If there is no more tx desc left free then we need to
 956          * tell the kernel to stop sending us tx frames.
 957          */
 958         if (unlikely(!cpdma_check_free_tx_desc(txch))) {
 959                 netif_tx_stop_queue(txq);
 960
 961                 /* Barrier, so that stop_queue visible to other cpus */
 962                 smp_mb__after_atomic();
 963
 964                 if (cpdma_check_free_tx_desc(txch))
 965                         netif_tx_wake_queue(txq);
 966         }
 967
 968         return NETDEV_TX_OK;
 969 fail:
 970         ndev->stats.tx_dropped++;
 971         netif_tx_stop_queue(txq);
 972
 973         /* Barrier, so that stop_queue visible to other cpus */
 974         smp_mb__after_atomic();
 975
 976         if (cpdma_check_free_tx_desc(txch))
 977                 netif_tx_wake_queue(txq);
 978
 979         return NETDEV_TX_BUSY;
 980 }
 981
 982 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
 983 {
 984         struct sockaddr *addr = (struct sockaddr *)p;
 985         struct cpsw_priv *priv = netdev_priv(ndev);
 986         struct cpsw_common *cpsw = priv->cpsw;
 987         int ret, slave_no;
 988         int flags = 0;
 989         u16 vid = 0;
 990
 991         slave_no = cpsw_slave_index(cpsw, priv);
 992         if (!is_valid_ether_addr(addr->sa_data))
 993                 return -EADDRNOTAVAIL;
 994
 995         ret = pm_runtime_get_sync(cpsw->dev);
 996         if (ret < 0) {
 997                 pm_runtime_put_noidle(cpsw->dev);
 998                 return ret;
 999         }
1000
1001         vid = cpsw->slaves[slave_no].port_vlan;
1002         flags = ALE_VLAN | ALE_SECURE;
1003
1004         cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
1005                            flags, vid);
1006         cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
1007                            flags, vid);
1008
1009         ether_addr_copy(priv->mac_addr, addr->sa_data);
1010         ether_addr_copy(ndev->dev_addr, priv->mac_addr);
1011         cpsw_set_slave_mac(&cpsw->slaves[slave_no], priv);
1012
1013         pm_runtime_put(cpsw->dev);
1014
1015         return 0;
1016 }
1017
1018 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1019                                      __be16 proto, u16 vid)
1020 {
1021         struct cpsw_priv *priv = netdev_priv(ndev);
1022         struct cpsw_common *cpsw = priv->cpsw;
1023         int ret;
1024         int i;
1025
1026         if (cpsw_is_switch_en(cpsw)) {
1027                 dev_dbg(cpsw->dev, "ndo del vlan is called in switch mode\n");
1028                 return 0;
1029         }
1030
1031         if (vid == cpsw->data.default_vlan)
1032                 return 0;
1033
1034         ret = pm_runtime_get_sync(cpsw->dev);
1035         if (ret < 0) {
1036                 pm_runtime_put_noidle(cpsw->dev);
1037                 return ret;
1038         }
1039
1040         /* reset the return code as pm_runtime_get_sync() can return
1041          * non zero values as well.
1042          */
1043         ret = 0;
1044         for (i = 0; i < cpsw->data.slaves; i++) {
1045                 if (cpsw->slaves[i].ndev &&
1046                     vid == cpsw->slaves[i].port_vlan) {
1047                         ret = -EINVAL;
1048                         goto err;
1049                 }
1050         }
1051
1052         dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1053         ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1054         if (ret)
1055                 dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
1056         ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1057                                  HOST_PORT_NUM, ALE_VLAN, vid);
1058         if (ret)
1059                 dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
1060                         ret);
1061         ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1062                                  0, ALE_VLAN, vid);
1063         if (ret)
1064                 dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
1065                         ret);
1066         cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1067         ret = 0;
1068 err:
1069         pm_runtime_put(cpsw->dev);
1070         return ret;
1071 }
1072
1073 static int cpsw_ndo_get_phys_port_name(struct net_device *ndev, char *name,
1074                                        size_t len)
1075 {
1076         struct cpsw_priv *priv = netdev_priv(ndev);
1077         int err;
1078
1079         err = snprintf(name, len, "p%d", priv->emac_port);
1080
1081         if (err >= len)
1082                 return -EINVAL;
1083
1084         return 0;
1085 }
1086
1087 #ifdef CONFIG_NET_POLL_CONTROLLER
1088 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1089 {
1090         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1091
1092         cpsw_intr_disable(cpsw);
1093         cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1094         cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1095         cpsw_intr_enable(cpsw);
1096 }
1097 #endif
1098
1099 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1100                              struct xdp_frame **frames, u32 flags)
1101 {
1102         struct cpsw_priv *priv = netdev_priv(ndev);
1103         struct xdp_frame *xdpf;
1104         int i, drops = 0;
1105
1106         if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1107                 return -EINVAL;
1108
1109         for (i = 0; i < n; i++) {
1110                 xdpf = frames[i];
1111                 if (xdpf->len < READ_ONCE(priv->tx_packet_min)) {
1112                         xdp_return_frame_rx_napi(xdpf);
1113                         drops++;
1114                         continue;
1115                 }
1116
1117                 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, priv->emac_port))
1118                         drops++;
1119         }
1120
1121         return n - drops;
1122 }
1123
1124 static int cpsw_get_port_parent_id(struct net_device *ndev,
1125                                    struct netdev_phys_item_id *ppid)
1126 {
1127         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1128
1129         ppid->id_len = sizeof(cpsw->base_mac);
1130         memcpy(&ppid->id, &cpsw->base_mac, ppid->id_len);
1131
1132         return 0;
1133 }
1134
1135 static const struct net_device_ops cpsw_netdev_ops = {
1136         .ndo_open               = cpsw_ndo_open,
1137         .ndo_stop               = cpsw_ndo_stop,
1138         .ndo_start_xmit         = cpsw_ndo_start_xmit,
1139         .ndo_set_mac_address    = cpsw_ndo_set_mac_address,
1140         .ndo_do_ioctl           = cpsw_ndo_ioctl,
1141         .ndo_validate_addr      = eth_validate_addr,
1142         .ndo_tx_timeout         = cpsw_ndo_tx_timeout,
1143         .ndo_set_rx_mode        = cpsw_ndo_set_rx_mode,
1144         .ndo_set_tx_maxrate     = cpsw_ndo_set_tx_maxrate,
1145 #ifdef CONFIG_NET_POLL_CONTROLLER
1146         .ndo_poll_controller    = cpsw_ndo_poll_controller,
1147 #endif
1148         .ndo_vlan_rx_add_vid    = cpsw_ndo_vlan_rx_add_vid,
1149         .ndo_vlan_rx_kill_vid   = cpsw_ndo_vlan_rx_kill_vid,
1150         .ndo_setup_tc           = cpsw_ndo_setup_tc,
1151         .ndo_get_phys_port_name = cpsw_ndo_get_phys_port_name,
1152         .ndo_bpf                = cpsw_ndo_bpf,
1153         .ndo_xdp_xmit           = cpsw_ndo_xdp_xmit,
1154         .ndo_get_port_parent_id = cpsw_get_port_parent_id,
1155 };
1156
1157 static void cpsw_get_drvinfo(struct net_device *ndev,
1158                              struct ethtool_drvinfo *info)
1159 {
1160         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1161         struct platform_device *pdev;
1162
1163         pdev = to_platform_device(cpsw->dev);
1164         strlcpy(info->driver, "cpsw-switch", sizeof(info->driver));
1165         strlcpy(info->version, "2.0", sizeof(info->version));
1166         strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1167 }
1168
1169 static int cpsw_set_pauseparam(struct net_device *ndev,
1170                                struct ethtool_pauseparam *pause)
1171 {
1172         struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1173         struct cpsw_priv *priv = netdev_priv(ndev);
1174         int slave_no;
1175
1176         slave_no = cpsw_slave_index(cpsw, priv);
1177         if (!cpsw->slaves[slave_no].phy)
1178                 return -EINVAL;
1179
1180         if (!phy_validate_pause(cpsw->slaves[slave_no].phy, pause))
1181                 return -EINVAL;
1182
1183         priv->rx_pause = pause->rx_pause ? true : false;
1184         priv->tx_pause = pause->tx_pause ? true : false;
1185
1186         phy_set_asym_pause(cpsw->slaves[slave_no].phy,
1187                            priv->rx_pause, priv->tx_pause);
1188
1189         return 0;
1190 }
1191
1192 static int cpsw_set_channels(struct net_device *ndev,
1193                              struct ethtool_channels *chs)
1194 {
1195         return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1196 }
1197
1198 static const struct ethtool_ops cpsw_ethtool_ops = {
1199         .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1200         .get_drvinfo            = cpsw_get_drvinfo,
1201         .get_msglevel           = cpsw_get_msglevel,
1202         .set_msglevel           = cpsw_set_msglevel,
1203         .get_link               = ethtool_op_get_link,
1204         .get_ts_info            = cpsw_get_ts_info,
1205         .get_coalesce           = cpsw_get_coalesce,
1206         .set_coalesce           = cpsw_set_coalesce,
1207         .get_sset_count         = cpsw_get_sset_count,
1208         .get_strings            = cpsw_get_strings,
1209         .get_ethtool_stats      = cpsw_get_ethtool_stats,
1210         .get_pauseparam         = cpsw_get_pauseparam,
1211         .set_pauseparam         = cpsw_set_pauseparam,
1212         .get_wol                = cpsw_get_wol,
1213         .set_wol                = cpsw_set_wol,
1214         .get_regs_len           = cpsw_get_regs_len,
1215         .get_regs               = cpsw_get_regs,
1216         .begin                  = cpsw_ethtool_op_begin,
1217         .complete               = cpsw_ethtool_op_complete,
1218         .get_channels           = cpsw_get_channels,
1219         .set_channels           = cpsw_set_channels,
1220         .get_link_ksettings     = cpsw_get_link_ksettings,
1221         .set_link_ksettings     = cpsw_set_link_ksettings,
1222         .get_eee                = cpsw_get_eee,
1223         .set_eee                = cpsw_set_eee,
1224         .nway_reset             = cpsw_nway_reset,
1225         .get_ringparam          = cpsw_get_ringparam,
1226         .set_ringparam          = cpsw_set_ringparam,
1227 };
1228
1229 static int cpsw_probe_dt(struct cpsw_common *cpsw)
1230 {
1231         struct device_node *node = cpsw->dev->of_node, *tmp_node, *port_np;
1232         struct cpsw_platform_data *data = &cpsw->data;
1233         struct device *dev = cpsw->dev;
1234         int ret;
1235         u32 prop;
1236
1237         if (!node)
1238                 return -EINVAL;
1239
1240         tmp_node = of_get_child_by_name(node, "ethernet-ports");
1241         if (!tmp_node)
1242                 return -ENOENT;
1243         data->slaves = of_get_child_count(tmp_node);
1244         if (data->slaves != CPSW_SLAVE_PORTS_NUM) {
1245                 of_node_put(tmp_node);
1246                 return -ENOENT;
1247         }
1248
1249         data->active_slave = 0;
1250         data->channels = CPSW_MAX_QUEUES;
1251         data->dual_emac = true;
1252         data->bd_ram_size = CPSW_BD_RAM_SIZE;
1253         data->mac_control = 0;
1254
1255         data->slave_data = devm_kcalloc(dev, CPSW_SLAVE_PORTS_NUM,
1256                                         sizeof(struct cpsw_slave_data),
1257                                         GFP_KERNEL);
1258         if (!data->slave_data) {
1259                 of_node_put(tmp_node);
1260                 return -ENOMEM;
1261         }
1262
1263         /* Populate all the child nodes here...
1264          */
1265         ret = devm_of_platform_populate(dev);
1266         /* We do not want to force this, as in some cases may not have child */
1267         if (ret)
1268                 dev_warn(dev, "Doesn't have any child node\n");
1269
1270         for_each_child_of_node(tmp_node, port_np) {
1271                 struct cpsw_slave_data *slave_data;
1272                 const void *mac_addr;
1273                 u32 port_id;
1274
1275                 ret = of_property_read_u32(port_np, "reg", &port_id);
1276                 if (ret < 0) {
1277                         dev_err(dev, "%pOF error reading port_id %d\n",
1278                                 port_np, ret);
1279                         goto err_node_put;
1280                 }
1281
1282                 if (!port_id || port_id > CPSW_SLAVE_PORTS_NUM) {
1283                         dev_err(dev, "%pOF has invalid port_id %u\n",
1284                                 port_np, port_id);
1285                         ret = -EINVAL;
1286                         goto err_node_put;
1287                 }
1288
1289                 slave_data = &data->slave_data[port_id - 1];
1290
1291                 slave_data->disabled = !of_device_is_available(port_np);
1292                 if (slave_data->disabled)
1293                         continue;
1294
1295                 slave_data->slave_node = port_np;
1296                 slave_data->ifphy = devm_of_phy_get(dev, port_np, NULL);
1297                 if (IS_ERR(slave_data->ifphy)) {
1298                         ret = PTR_ERR(slave_data->ifphy);
1299                         dev_err(dev, "%pOF: Error retrieving port phy: %d\n",
1300                                 port_np, ret);
1301                         goto err_node_put;
1302                 }
1303
1304                 if (of_phy_is_fixed_link(port_np)) {
1305                         ret = of_phy_register_fixed_link(port_np);
1306                         if (ret) {
1307                                 if (ret != -EPROBE_DEFER)
1308                                         dev_err(dev, "%pOF failed to register fixed-link phy: %d\n",
1309                                                 port_np, ret);
1310                                 goto err_node_put;
1311                         }
1312                         slave_data->phy_node = of_node_get(port_np);
1313                 } else {
1314                         slave_data->phy_node =
1315                                 of_parse_phandle(port_np, "phy-handle", 0);
1316                 }
1317
1318                 if (!slave_data->phy_node) {
1319                         dev_err(dev, "%pOF no phy found\n", port_np);
1320                         ret = -ENODEV;
1321                         goto err_node_put;
1322                 }
1323
1324                 ret = of_get_phy_mode(port_np, &slave_data->phy_if);
1325                 if (ret) {
1326                         dev_err(dev, "%pOF read phy-mode err %d\n",
1327                                 port_np, ret);
1328                         goto err_node_put;
1329                 }
1330
1331                 mac_addr = of_get_mac_address(port_np);
1332                 if (!IS_ERR(mac_addr)) {
1333                         ether_addr_copy(slave_data->mac_addr, mac_addr);
1334                 } else {
1335                         ret = ti_cm_get_macid(dev, port_id - 1,
1336                                               slave_data->mac_addr);
1337                         if (ret)
1338                                 goto err_node_put;
1339                 }
1340
1341                 if (of_property_read_u32(port_np, "ti,dual-emac-pvid",
1342                                          &prop)) {
1343                         dev_err(dev, "%pOF Missing dual_emac_res_vlan in DT.\n",
1344                                 port_np);
1345                         slave_data->dual_emac_res_vlan = port_id;
1346                         dev_err(dev, "%pOF Using %d as Reserved VLAN\n",
1347                                 port_np, slave_data->dual_emac_res_vlan);
1348                 } else {
1349                         slave_data->dual_emac_res_vlan = prop;
1350                 }
1351         }
1352
1353         of_node_put(tmp_node);
1354         return 0;
1355
1356 err_node_put:
1357         of_node_put(port_np);
1358         of_node_put(tmp_node);
1359         return ret;
1360 }
1361
1362 static void cpsw_remove_dt(struct cpsw_common *cpsw)
1363 {
1364         struct cpsw_platform_data *data = &cpsw->data;
1365         int i = 0;
1366
1367         for (i = 0; i < cpsw->data.slaves; i++) {
1368                 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1369                 struct device_node *port_np = slave_data->phy_node;
1370
1371                 if (port_np) {
1372                         if (of_phy_is_fixed_link(port_np))
1373                                 of_phy_deregister_fixed_link(port_np);
1374
1375                         of_node_put(port_np);
1376                 }
1377         }
1378 }
1379
1380 static int cpsw_create_ports(struct cpsw_common *cpsw)
1381 {
1382         struct cpsw_platform_data *data = &cpsw->data;
1383         struct net_device *ndev, *napi_ndev = NULL;
1384         struct device *dev = cpsw->dev;
1385         struct cpsw_priv *priv;
1386         int ret = 0, i = 0;
1387
1388         for (i = 0; i < cpsw->data.slaves; i++) {
1389                 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1390
1391                 if (slave_data->disabled)
1392                         continue;
1393
1394                 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1395                                                CPSW_MAX_QUEUES,
1396                                                CPSW_MAX_QUEUES);
1397                 if (!ndev) {
1398                         dev_err(dev, "error allocating net_device\n");
1399                         return -ENOMEM;
1400                 }
1401
1402                 priv = netdev_priv(ndev);
1403                 priv->cpsw = cpsw;
1404                 priv->ndev = ndev;
1405                 priv->dev  = dev;
1406                 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1407                 priv->emac_port = i + 1;
1408                 priv->tx_packet_min = CPSW_MIN_PACKET_SIZE;
1409
1410                 if (is_valid_ether_addr(slave_data->mac_addr)) {
1411                         ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1412                         dev_info(cpsw->dev, "Detected MACID = %pM\n",
1413                                  priv->mac_addr);
1414                 } else {
1415                         eth_random_addr(slave_data->mac_addr);
1416                         dev_info(cpsw->dev, "Random MACID = %pM\n",
1417                                  priv->mac_addr);
1418                 }
1419                 ether_addr_copy(ndev->dev_addr, slave_data->mac_addr);
1420                 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1421
1422                 cpsw->slaves[i].ndev = ndev;
1423
1424                 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1425                                   NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_NETNS_LOCAL;
1426
1427                 ndev->netdev_ops = &cpsw_netdev_ops;
1428                 ndev->ethtool_ops = &cpsw_ethtool_ops;
1429                 SET_NETDEV_DEV(ndev, dev);
1430
1431                 if (!napi_ndev) {
1432                         /* CPSW Host port CPDMA interface is shared between
1433                          * ports and there is only one TX and one RX IRQs
1434                          * available for all possible TX and RX channels
1435                          * accordingly.
1436                          */
1437                         netif_napi_add(ndev, &cpsw->napi_rx,
1438                                        cpsw->quirk_irq ?
1439                                        cpsw_rx_poll : cpsw_rx_mq_poll,
1440                                        CPSW_POLL_WEIGHT);
1441                         netif_tx_napi_add(ndev, &cpsw->napi_tx,
1442                                           cpsw->quirk_irq ?
1443                                           cpsw_tx_poll : cpsw_tx_mq_poll,
1444                                           CPSW_POLL_WEIGHT);
1445                 }
1446
1447                 napi_ndev = ndev;
1448         }
1449
1450         return ret;
1451 }
1452
1453 static void cpsw_unregister_ports(struct cpsw_common *cpsw)
1454 {
1455         int i = 0;
1456
1457         for (i = 0; i < cpsw->data.slaves; i++) {
1458                 if (!cpsw->slaves[i].ndev)
1459                         continue;
1460
1461                 unregister_netdev(cpsw->slaves[i].ndev);
1462         }
1463 }
1464
1465 static int cpsw_register_ports(struct cpsw_common *cpsw)
1466 {
1467         int ret = 0, i = 0;
1468
1469         for (i = 0; i < cpsw->data.slaves; i++) {
1470                 if (!cpsw->slaves[i].ndev)
1471                         continue;
1472
1473                 /* register the network device */
1474                 ret = register_netdev(cpsw->slaves[i].ndev);
1475                 if (ret) {
1476                         dev_err(cpsw->dev,
1477                                 "cpsw: err registering net device%d\n", i);
1478                         cpsw->slaves[i].ndev = NULL;
1479                         break;
1480                 }
1481         }
1482
1483         if (ret)
1484                 cpsw_unregister_ports(cpsw);
1485         return ret;
1486 }
1487
1488 bool cpsw_port_dev_check(const struct net_device *ndev)
1489 {
1490         if (ndev->netdev_ops == &cpsw_netdev_ops) {
1491                 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1492
1493                 return !cpsw->data.dual_emac;
1494         }
1495
1496         return false;
1497 }
1498
1499 static void cpsw_port_offload_fwd_mark_update(struct cpsw_common *cpsw)
1500 {
1501         int set_val = 0;
1502         int i;
1503
1504         if (!cpsw->ale_bypass &&
1505             (cpsw->br_members == (ALE_PORT_1 | ALE_PORT_2)))
1506                 set_val = 1;
1507
1508         dev_dbg(cpsw->dev, "set offload_fwd_mark %d\n", set_val);
1509
1510         for (i = 0; i < cpsw->data.slaves; i++) {
1511                 struct net_device *sl_ndev = cpsw->slaves[i].ndev;
1512                 struct cpsw_priv *priv = netdev_priv(sl_ndev);
1513
1514                 priv->offload_fwd_mark = set_val;
1515         }
1516 }
1517
1518 static int cpsw_netdevice_port_link(struct net_device *ndev,
1519                                     struct net_device *br_ndev)
1520 {
1521         struct cpsw_priv *priv = netdev_priv(ndev);
1522         struct cpsw_common *cpsw = priv->cpsw;
1523
1524         if (!cpsw->br_members) {
1525                 cpsw->hw_bridge_dev = br_ndev;
1526         } else {
1527                 /* This is adding the port to a second bridge, this is
1528                  * unsupported
1529                  */
1530                 if (cpsw->hw_bridge_dev != br_ndev)
1531                         return -EOPNOTSUPP;
1532         }
1533
1534         cpsw->br_members |= BIT(priv->emac_port);
1535
1536         cpsw_port_offload_fwd_mark_update(cpsw);
1537
1538         return NOTIFY_DONE;
1539 }
1540
1541 static void cpsw_netdevice_port_unlink(struct net_device *ndev)
1542 {
1543         struct cpsw_priv *priv = netdev_priv(ndev);
1544         struct cpsw_common *cpsw = priv->cpsw;
1545
1546         cpsw->br_members &= ~BIT(priv->emac_port);
1547
1548         cpsw_port_offload_fwd_mark_update(cpsw);
1549
1550         if (!cpsw->br_members)
1551                 cpsw->hw_bridge_dev = NULL;
1552 }
1553
1554 /* netdev notifier */
1555 static int cpsw_netdevice_event(struct notifier_block *unused,
1556                                 unsigned long event, void *ptr)
1557 {
1558         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
1559         struct netdev_notifier_changeupper_info *info;
1560         int ret = NOTIFY_DONE;
1561
1562         if (!cpsw_port_dev_check(ndev))
1563                 return NOTIFY_DONE;
1564
1565         switch (event) {
1566         case NETDEV_CHANGEUPPER:
1567                 info = ptr;
1568
1569                 if (netif_is_bridge_master(info->upper_dev)) {
1570                         if (info->linking)
1571                                 ret = cpsw_netdevice_port_link(ndev,
1572                                                                info->upper_dev);
1573                         else
1574                                 cpsw_netdevice_port_unlink(ndev);
1575                 }
1576                 break;
1577         default:
1578                 return NOTIFY_DONE;
1579         }
1580
1581         return notifier_from_errno(ret);
1582 }
1583
1584 static struct notifier_block cpsw_netdevice_nb __read_mostly = {
1585         .notifier_call = cpsw_netdevice_event,
1586 };
1587
1588 static int cpsw_register_notifiers(struct cpsw_common *cpsw)
1589 {
1590         int ret = 0;
1591
1592         ret = register_netdevice_notifier(&cpsw_netdevice_nb);
1593         if (ret) {
1594                 dev_err(cpsw->dev, "can't register netdevice notifier\n");
1595                 return ret;
1596         }
1597
1598         ret = cpsw_switchdev_register_notifiers(cpsw);
1599         if (ret)
1600                 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1601
1602         return ret;
1603 }
1604
1605 static void cpsw_unregister_notifiers(struct cpsw_common *cpsw)
1606 {
1607         cpsw_switchdev_unregister_notifiers(cpsw);
1608         unregister_netdevice_notifier(&cpsw_netdevice_nb);
1609 }
1610
1611 static const struct devlink_ops cpsw_devlink_ops = {
1612 };
1613
1614 static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
1615                                    struct devlink_param_gset_ctx *ctx)
1616 {
1617         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1618         struct cpsw_common *cpsw = dl_priv->cpsw;
1619
1620         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1621
1622         if (id != CPSW_DL_PARAM_SWITCH_MODE)
1623                 return  -EOPNOTSUPP;
1624
1625         ctx->val.vbool = !cpsw->data.dual_emac;
1626
1627         return 0;
1628 }
1629
1630 static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
1631                                    struct devlink_param_gset_ctx *ctx)
1632 {
1633         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1634         struct cpsw_common *cpsw = dl_priv->cpsw;
1635         int vlan = cpsw->data.default_vlan;
1636         bool switch_en = ctx->val.vbool;
1637         bool if_running = false;
1638         int i;
1639
1640         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1641
1642         if (id != CPSW_DL_PARAM_SWITCH_MODE)
1643                 return  -EOPNOTSUPP;
1644
1645         if (switch_en == !cpsw->data.dual_emac)
1646                 return 0;
1647
1648         if (!switch_en && cpsw->br_members) {
1649                 dev_err(cpsw->dev, "Remove ports from BR before disabling switch mode\n");
1650                 return -EINVAL;
1651         }
1652
1653         rtnl_lock();
1654
1655         for (i = 0; i < cpsw->data.slaves; i++) {
1656                 struct cpsw_slave *slave = &cpsw->slaves[i];
1657                 struct net_device *sl_ndev = slave->ndev;
1658
1659                 if (!sl_ndev || !netif_running(sl_ndev))
1660                         continue;
1661
1662                 if_running = true;
1663         }
1664
1665         if (!if_running) {
1666                 /* all ndevs are down */
1667                 cpsw->data.dual_emac = !switch_en;
1668                 for (i = 0; i < cpsw->data.slaves; i++) {
1669                         struct cpsw_slave *slave = &cpsw->slaves[i];
1670                         struct net_device *sl_ndev = slave->ndev;
1671
1672                         if (!sl_ndev)
1673                                 continue;
1674
1675                         if (switch_en)
1676                                 vlan = cpsw->data.default_vlan;
1677                         else
1678                                 vlan = slave->data->dual_emac_res_vlan;
1679                         slave->port_vlan = vlan;
1680                 }
1681                 goto exit;
1682         }
1683
1684         if (switch_en) {
1685                 dev_info(cpsw->dev, "Enable switch mode\n");
1686
1687                 /* enable bypass - no forwarding; all traffic goes to Host */
1688                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1689
1690                 /* clean up ALE table */
1691                 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1692                 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1693
1694                 cpsw_init_host_port_switch(cpsw);
1695
1696                 for (i = 0; i < cpsw->data.slaves; i++) {
1697                         struct cpsw_slave *slave = &cpsw->slaves[i];
1698                         struct net_device *sl_ndev = slave->ndev;
1699                         struct cpsw_priv *priv;
1700
1701                         if (!sl_ndev)
1702                                 continue;
1703
1704                         priv = netdev_priv(sl_ndev);
1705                         slave->port_vlan = vlan;
1706                         WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE_VLAN);
1707                         if (netif_running(sl_ndev))
1708                                 cpsw_port_add_switch_def_ale_entries(priv,
1709                                                                      slave);
1710                 }
1711
1712                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1713                 cpsw->data.dual_emac = false;
1714         } else {
1715                 dev_info(cpsw->dev, "Disable switch mode\n");
1716
1717                 /* enable bypass - no forwarding; all traffic goes to Host */
1718                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1719
1720                 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1721                 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1722
1723                 cpsw_init_host_port_dual_mac(cpsw);
1724
1725                 for (i = 0; i < cpsw->data.slaves; i++) {
1726                         struct cpsw_slave *slave = &cpsw->slaves[i];
1727                         struct net_device *sl_ndev = slave->ndev;
1728                         struct cpsw_priv *priv;
1729
1730                         if (!sl_ndev)
1731                                 continue;
1732
1733                         priv = netdev_priv(slave->ndev);
1734                         slave->port_vlan = slave->data->dual_emac_res_vlan;
1735                         WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE);
1736                         cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
1737                 }
1738
1739                 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1740                 cpsw->data.dual_emac = true;
1741         }
1742 exit:
1743         rtnl_unlock();
1744
1745         return 0;
1746 }
1747
1748 static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id,
1749                                 struct devlink_param_gset_ctx *ctx)
1750 {
1751         struct cpsw_devlink *dl_priv = devlink_priv(dl);
1752         struct cpsw_common *cpsw = dl_priv->cpsw;
1753
1754         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1755
1756         switch (id) {
1757         case CPSW_DL_PARAM_ALE_BYPASS:
1758                 ctx->val.vbool = cpsw_ale_control_get(cpsw->ale, 0, ALE_BYPASS);
1759                 break;
1760         default:
1761                 return -EOPNOTSUPP;
1762         }
1763
1764         return 0;
1765 }
1766
1767 static int cpsw_dl_ale_ctrl_set(struct devlink *dl, u32 id,
1768                                 struct devlink_param_gset_ctx *ctx)
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));
1811         if (!cpsw->devlink)
1812                 return -ENOMEM;
1813
1814         dl_priv = devlink_priv(cpsw->devlink);
1815         dl_priv->cpsw = cpsw;
1816
1817         ret = devlink_register(cpsw->devlink, dev);
1818         if (ret) {
1819                 dev_err(dev, "DL reg fail ret:%d\n", ret);
1820                 goto dl_free;
1821         }
1822
1823         ret = devlink_params_register(cpsw->devlink, cpsw_devlink_params,
1824                                       ARRAY_SIZE(cpsw_devlink_params));
1825         if (ret) {
1826                 dev_err(dev, "DL params reg fail ret:%d\n", ret);
1827                 goto dl_unreg;
1828         }
1829
1830         devlink_params_publish(cpsw->devlink);
1831         return ret;
1832
1833 dl_unreg:
1834         devlink_unregister(cpsw->devlink);
1835 dl_free:
1836         devlink_free(cpsw->devlink);
1837         return ret;
1838 }
1839
1840 static void cpsw_unregister_devlink(struct cpsw_common *cpsw)
1841 {
1842         devlink_params_unpublish(cpsw->devlink);
1843         devlink_params_unregister(cpsw->devlink, cpsw_devlink_params,
1844                                   ARRAY_SIZE(cpsw_devlink_params));
1845         devlink_unregister(cpsw->devlink);
1846         devlink_free(cpsw->devlink);
1847 }
1848
1849 static const struct of_device_id cpsw_of_mtable[] = {
1850         { .compatible = "ti,cpsw-switch"},
1851         { .compatible = "ti,am335x-cpsw-switch"},
1852         { .compatible = "ti,am4372-cpsw-switch"},
1853         { .compatible = "ti,dra7-cpsw-switch"},
1854         { /* sentinel */ },
1855 };
1856 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1857
1858 static const struct soc_device_attribute cpsw_soc_devices[] = {
1859         { .family = "AM33xx", .revision = "ES1.0"},
1860         { /* sentinel */ }
1861 };
1862
1863 static int cpsw_probe(struct platform_device *pdev)
1864 {
1865         const struct soc_device_attribute *soc;
1866         struct device *dev = &pdev->dev;
1867         struct cpsw_common *cpsw;
1868         struct resource *ss_res;
1869         struct gpio_descs *mode;
1870         void __iomem *ss_regs;
1871         int ret = 0, ch;
1872         struct clk *clk;
1873         int irq;
1874
1875         cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1876         if (!cpsw)
1877                 return -ENOMEM;
1878
1879         cpsw_slave_index = cpsw_slave_index_priv;
1880
1881         cpsw->dev = dev;
1882
1883         cpsw->slaves = devm_kcalloc(dev,
1884                                     CPSW_SLAVE_PORTS_NUM,
1885                                     sizeof(struct cpsw_slave),
1886                                     GFP_KERNEL);
1887         if (!cpsw->slaves)
1888                 return -ENOMEM;
1889
1890         mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1891         if (IS_ERR(mode)) {
1892                 ret = PTR_ERR(mode);
1893                 dev_err(dev, "gpio request failed, ret %d\n", ret);
1894                 return ret;
1895         }
1896
1897         clk = devm_clk_get(dev, "fck");
1898         if (IS_ERR(clk)) {
1899                 ret = PTR_ERR(clk);
1900                 dev_err(dev, "fck is not found %d\n", ret);
1901                 return ret;
1902         }
1903         cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1904
1905         ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1906         ss_regs = devm_ioremap_resource(dev, ss_res);
1907         if (IS_ERR(ss_regs)) {
1908                 ret = PTR_ERR(ss_regs);
1909                 return ret;
1910         }
1911         cpsw->regs = ss_regs;
1912
1913         irq = platform_get_irq_byname(pdev, "rx");
1914         if (irq < 0)
1915                 return irq;
1916         cpsw->irqs_table[0] = irq;
1917
1918         irq = platform_get_irq_byname(pdev, "tx");
1919         if (irq < 0)
1920                 return irq;
1921         cpsw->irqs_table[1] = irq;
1922
1923         irq = platform_get_irq_byname(pdev, "misc");
1924         if (irq <= 0)
1925                 return irq;
1926         cpsw->misc_irq = irq;
1927
1928         platform_set_drvdata(pdev, cpsw);
1929         /* This may be required here for child devices. */
1930         pm_runtime_enable(dev);
1931
1932         /* Need to enable clocks with runtime PM api to access module
1933          * registers
1934          */
1935         ret = pm_runtime_get_sync(dev);
1936         if (ret < 0) {
1937                 pm_runtime_put_noidle(dev);
1938                 pm_runtime_disable(dev);
1939                 return ret;
1940         }
1941
1942         ret = cpsw_probe_dt(cpsw);
1943         if (ret)
1944                 goto clean_dt_ret;
1945
1946         soc = soc_device_match(cpsw_soc_devices);
1947         if (soc)
1948                 cpsw->quirk_irq = true;
1949
1950         cpsw->rx_packet_max = rx_packet_max;
1951         cpsw->descs_pool_size = descs_pool_size;
1952         eth_random_addr(cpsw->base_mac);
1953
1954         ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1955                                (u32 __force)ss_res->start + CPSW2_BD_OFFSET,
1956                                descs_pool_size);
1957         if (ret)
1958                 goto clean_dt_ret;
1959
1960         cpsw->wr_regs = cpsw->version == CPSW_VERSION_1 ?
1961                         ss_regs + CPSW1_WR_OFFSET :
1962                         ss_regs + CPSW2_WR_OFFSET;
1963
1964         ch = cpsw->quirk_irq ? 0 : 7;
1965         cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1966         if (IS_ERR(cpsw->txv[0].ch)) {
1967                 dev_err(dev, "error initializing tx dma channel\n");
1968                 ret = PTR_ERR(cpsw->txv[0].ch);
1969                 goto clean_cpts;
1970         }
1971
1972         cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1973         if (IS_ERR(cpsw->rxv[0].ch)) {
1974                 dev_err(dev, "error initializing rx dma channel\n");
1975                 ret = PTR_ERR(cpsw->rxv[0].ch);
1976                 goto clean_cpts;
1977         }
1978         cpsw_split_res(cpsw);
1979
1980         /* setup netdevs */
1981         ret = cpsw_create_ports(cpsw);
1982         if (ret)
1983                 goto clean_unregister_netdev;
1984
1985         /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1986          * MISC IRQs which are always kept disabled with this driver so
1987          * we will not request them.
1988          *
1989          * If anyone wants to implement support for those, make sure to
1990          * first request and append them to irqs_table array.
1991          */
1992
1993         ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1994                                0, dev_name(dev), cpsw);
1995         if (ret < 0) {
1996                 dev_err(dev, "error attaching irq (%d)\n", ret);
1997                 goto clean_unregister_netdev;
1998         }
1999
2000         ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
2001                                0, dev_name(dev), cpsw);
2002         if (ret < 0) {
2003                 dev_err(dev, "error attaching irq (%d)\n", ret);
2004                 goto clean_unregister_netdev;
2005         }
2006
2007         if (!cpsw->cpts)
2008                 goto skip_cpts;
2009
2010         ret = devm_request_irq(dev, cpsw->misc_irq, cpsw_misc_interrupt,
2011                                0, dev_name(&pdev->dev), cpsw);
2012         if (ret < 0) {
2013                 dev_err(dev, "error attaching misc irq (%d)\n", ret);
2014                 goto clean_unregister_netdev;
2015         }
2016
2017         /* Enable misc CPTS evnt_pend IRQ */
2018         cpts_set_irqpoll(cpsw->cpts, false);
2019
2020 skip_cpts:
2021         ret = cpsw_register_notifiers(cpsw);
2022         if (ret)
2023                 goto clean_unregister_netdev;
2024
2025         ret = cpsw_register_devlink(cpsw);
2026         if (ret)
2027                 goto clean_unregister_notifiers;
2028
2029         ret = cpsw_register_ports(cpsw);
2030         if (ret)
2031                 goto clean_unregister_notifiers;
2032
2033         dev_notice(dev, "initialized (regs %pa, pool size %d) hw_ver:%08X %d.%d (%d)\n",
2034                    &ss_res->start, descs_pool_size,
2035                    cpsw->version, CPSW_MAJOR_VERSION(cpsw->version),
2036                    CPSW_MINOR_VERSION(cpsw->version),
2037                    CPSW_RTL_VERSION(cpsw->version));
2038
2039         pm_runtime_put(dev);
2040
2041         return 0;
2042
2043 clean_unregister_notifiers:
2044         cpsw_unregister_notifiers(cpsw);
2045 clean_unregister_netdev:
2046         cpsw_unregister_ports(cpsw);
2047 clean_cpts:
2048         cpts_release(cpsw->cpts);
2049         cpdma_ctlr_destroy(cpsw->dma);
2050 clean_dt_ret:
2051         cpsw_remove_dt(cpsw);
2052         pm_runtime_put_sync(dev);
2053         pm_runtime_disable(dev);
2054         return ret;
2055 }
2056
2057 static int cpsw_remove(struct platform_device *pdev)
2058 {
2059         struct cpsw_common *cpsw = platform_get_drvdata(pdev);
2060         int ret;
2061
2062         ret = pm_runtime_get_sync(&pdev->dev);
2063         if (ret < 0) {
2064                 pm_runtime_put_noidle(&pdev->dev);
2065                 return ret;
2066         }
2067
2068         cpsw_unregister_notifiers(cpsw);
2069         cpsw_unregister_devlink(cpsw);
2070         cpsw_unregister_ports(cpsw);
2071
2072         cpts_release(cpsw->cpts);
2073         cpdma_ctlr_destroy(cpsw->dma);
2074         cpsw_remove_dt(cpsw);
2075         pm_runtime_put_sync(&pdev->dev);
2076         pm_runtime_disable(&pdev->dev);
2077         return 0;
2078 }
2079
2080 static int __maybe_unused cpsw_suspend(struct device *dev)
2081 {
2082         struct cpsw_common *cpsw = dev_get_drvdata(dev);
2083         int i;
2084
2085         rtnl_lock();
2086
2087         for (i = 0; i < cpsw->data.slaves; i++) {
2088                 struct net_device *ndev = cpsw->slaves[i].ndev;
2089
2090                 if (!(ndev && netif_running(ndev)))
2091                         continue;
2092
2093                 cpsw_ndo_stop(ndev);
2094         }
2095
2096         rtnl_unlock();
2097
2098         /* Select sleep pin state */
2099         pinctrl_pm_select_sleep_state(dev);
2100
2101         return 0;
2102 }
2103
2104 static int __maybe_unused cpsw_resume(struct device *dev)
2105 {
2106         struct cpsw_common *cpsw = dev_get_drvdata(dev);
2107         int i;
2108
2109         /* Select default pin state */
2110         pinctrl_pm_select_default_state(dev);
2111
2112         /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
2113         rtnl_lock();
2114
2115         for (i = 0; i < cpsw->data.slaves; i++) {
2116                 struct net_device *ndev = cpsw->slaves[i].ndev;
2117
2118                 if (!(ndev && netif_running(ndev)))
2119                         continue;
2120
2121                 cpsw_ndo_open(ndev);
2122         }
2123
2124         rtnl_unlock();
2125
2126         return 0;
2127 }
2128
2129 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2130
2131 static struct platform_driver cpsw_driver = {
2132         .driver = {
2133                 .name    = "cpsw-switch",
2134                 .pm      = &cpsw_pm_ops,
2135                 .of_match_table = cpsw_of_mtable,
2136         },
2137         .probe = cpsw_probe,
2138         .remove = cpsw_remove,
2139 };
2140
2141 module_platform_driver(cpsw_driver);
2142
2143 MODULE_LICENSE("GPL");
2144 MODULE_DESCRIPTION("TI CPSW switchdev Ethernet driver");