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