drivers/net/ethernet/ti/am65-cpsw-nuss.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Texas Instruments K3 AM65 Ethernet Switch SubSystem Driver
   3  *
   4  * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
   5  *
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/etherdevice.h>
  10 #include <linux/if_vlan.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/kernel.h>
  13 #include <linux/kmemleak.h>
  14 #include <linux/module.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/net_tstamp.h>
  17 #include <linux/of.h>
  18 #include <linux/of_mdio.h>
  19 #include <linux/of_net.h>
  20 #include <linux/of_device.h>
  21 #include <linux/phy.h>
  22 #include <linux/phy/phy.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/regmap.h>
  26 #include <linux/mfd/syscon.h>
  27 #include <linux/sys_soc.h>
  28 #include <linux/dma/ti-cppi5.h>
  29 #include <linux/dma/k3-udma-glue.h>
  30 #include <net/switchdev.h>
  31
  32 #include "cpsw_ale.h"
  33 #include "cpsw_sl.h"
  34 #include "am65-cpsw-nuss.h"
  35 #include "am65-cpsw-switchdev.h"
  36 #include "k3-cppi-desc-pool.h"
  37 #include "am65-cpts.h"
  38
  39 #define AM65_CPSW_SS_BASE       0x0
  40 #define AM65_CPSW_SGMII_BASE    0x100
  41 #define AM65_CPSW_XGMII_BASE    0x2100
  42 #define AM65_CPSW_CPSW_NU_BASE  0x20000
  43 #define AM65_CPSW_NU_PORTS_BASE 0x1000
  44 #define AM65_CPSW_NU_FRAM_BASE  0x12000
  45 #define AM65_CPSW_NU_STATS_BASE 0x1a000
  46 #define AM65_CPSW_NU_ALE_BASE   0x1e000
  47 #define AM65_CPSW_NU_CPTS_BASE  0x1d000
  48
  49 #define AM65_CPSW_NU_PORTS_OFFSET       0x1000
  50 #define AM65_CPSW_NU_STATS_PORT_OFFSET  0x200
  51 #define AM65_CPSW_NU_FRAM_PORT_OFFSET   0x200
  52
  53 #define AM65_CPSW_MAX_PORTS     8
  54
  55 #define AM65_CPSW_MIN_PACKET_SIZE       VLAN_ETH_ZLEN
  56 #define AM65_CPSW_MAX_PACKET_SIZE       (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
  57
  58 #define AM65_CPSW_REG_CTL               0x004
  59 #define AM65_CPSW_REG_STAT_PORT_EN      0x014
  60 #define AM65_CPSW_REG_PTYPE             0x018
  61
  62 #define AM65_CPSW_P0_REG_CTL                    0x004
  63 #define AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET      0x008
  64
  65 #define AM65_CPSW_PORT_REG_PRI_CTL              0x01c
  66 #define AM65_CPSW_PORT_REG_RX_PRI_MAP           0x020
  67 #define AM65_CPSW_PORT_REG_RX_MAXLEN            0x024
  68
  69 #define AM65_CPSW_PORTN_REG_SA_L                0x308
  70 #define AM65_CPSW_PORTN_REG_SA_H                0x30c
  71 #define AM65_CPSW_PORTN_REG_TS_CTL              0x310
  72 #define AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG    0x314
  73 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG   0x318
  74 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2       0x31C
  75
  76 #define AM65_CPSW_CTL_VLAN_AWARE                BIT(1)
  77 #define AM65_CPSW_CTL_P0_ENABLE                 BIT(2)
  78 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE          BIT(13)
  79 #define AM65_CPSW_CTL_P0_RX_PAD                 BIT(14)
  80
  81 /* AM65_CPSW_P0_REG_CTL */
  82 #define AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN     BIT(0)
  83
  84 /* AM65_CPSW_PORT_REG_PRI_CTL */
  85 #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN      BIT(8)
  86
  87 /* AM65_CPSW_PN_TS_CTL register fields */
  88 #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN         BIT(4)
  89 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN      BIT(5)
  90 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT2_EN      BIT(6)
  91 #define AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN         BIT(7)
  92 #define AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN         BIT(10)
  93 #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN       BIT(11)
  94 #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT   16
  95
  96 /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */
  97 #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT     16
  98
  99 /* AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 */
 100 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107       BIT(16)
 101 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129       BIT(17)
 102 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130       BIT(18)
 103 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131       BIT(19)
 104 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132       BIT(20)
 105 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319       BIT(21)
 106 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320       BIT(22)
 107 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO BIT(23)
 108
 109 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
 110 #define AM65_CPSW_TS_EVENT_MSG_TYPE_BITS (BIT(0) | BIT(1) | BIT(2) | BIT(3))
 111
 112 #define AM65_CPSW_TS_SEQ_ID_OFFSET (0x1e)
 113
 114 #define AM65_CPSW_TS_TX_ANX_ALL_EN              \
 115         (AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN |      \
 116          AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN |      \
 117          AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN)
 118
 119 #define AM65_CPSW_ALE_AGEOUT_DEFAULT    30
 120 /* Number of TX/RX descriptors */
 121 #define AM65_CPSW_MAX_TX_DESC   500
 122 #define AM65_CPSW_MAX_RX_DESC   500
 123
 124 #define AM65_CPSW_NAV_PS_DATA_SIZE 16
 125 #define AM65_CPSW_NAV_SW_DATA_SIZE 16
 126
 127 #define AM65_CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK | \
 128                          NETIF_MSG_IFUP | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | \
 129                          NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
 130
 131 static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave,
 132                                       const u8 *dev_addr)
 133 {
 134         u32 mac_hi = (dev_addr[0] << 0) | (dev_addr[1] << 8) |
 135                      (dev_addr[2] << 16) | (dev_addr[3] << 24);
 136         u32 mac_lo = (dev_addr[4] << 0) | (dev_addr[5] << 8);
 137
 138         writel(mac_hi, slave->port_base + AM65_CPSW_PORTN_REG_SA_H);
 139         writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L);
 140 }
 141
 142 static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port)
 143 {
 144         cpsw_sl_reset(port->slave.mac_sl, 100);
 145         /* Max length register has to be restored after MAC SL reset */
 146         writel(AM65_CPSW_MAX_PACKET_SIZE,
 147                port->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 148 }
 149
 150 static void am65_cpsw_nuss_get_ver(struct am65_cpsw_common *common)
 151 {
 152         common->nuss_ver = readl(common->ss_base);
 153         common->cpsw_ver = readl(common->cpsw_base);
 154         dev_info(common->dev,
 155                  "initializing am65 cpsw nuss version 0x%08X, cpsw version 0x%08X Ports: %u quirks:%08x\n",
 156                 common->nuss_ver,
 157                 common->cpsw_ver,
 158                 common->port_num + 1,
 159                 common->pdata.quirks);
 160 }
 161
 162 void am65_cpsw_nuss_adjust_link(struct net_device *ndev)
 163 {
 164         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 165         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 166         struct phy_device *phy = port->slave.phy;
 167         u32 mac_control = 0;
 168
 169         if (!phy)
 170                 return;
 171
 172         if (phy->link) {
 173                 mac_control = CPSW_SL_CTL_GMII_EN;
 174
 175                 if (phy->speed == 1000)
 176                         mac_control |= CPSW_SL_CTL_GIG;
 177                 if (phy->speed == 10 && phy_interface_is_rgmii(phy))
 178                         /* Can be used with in band mode only */
 179                         mac_control |= CPSW_SL_CTL_EXT_EN;
 180                 if (phy->speed == 100 && phy->interface == PHY_INTERFACE_MODE_RMII)
 181                         mac_control |= CPSW_SL_CTL_IFCTL_A;
 182                 if (phy->duplex)
 183                         mac_control |= CPSW_SL_CTL_FULLDUPLEX;
 184
 185                 /* RGMII speed is 100M if !CPSW_SL_CTL_GIG*/
 186
 187                 /* rx_pause/tx_pause */
 188                 if (port->slave.rx_pause)
 189                         mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
 190
 191                 if (port->slave.tx_pause)
 192                         mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
 193
 194                 cpsw_sl_ctl_set(port->slave.mac_sl, mac_control);
 195
 196                 /* enable forwarding */
 197                 cpsw_ale_control_set(common->ale, port->port_id,
 198                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 199
 200                 am65_cpsw_qos_link_up(ndev, phy->speed);
 201                 netif_tx_wake_all_queues(ndev);
 202         } else {
 203                 int tmo;
 204
 205                 /* disable forwarding */
 206                 cpsw_ale_control_set(common->ale, port->port_id,
 207                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 208
 209                 cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
 210
 211                 tmo = cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
 212                 dev_dbg(common->dev, "donw msc_sl %08x tmo %d\n",
 213                         cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_MACSTATUS),
 214                         tmo);
 215
 216                 cpsw_sl_ctl_reset(port->slave.mac_sl);
 217
 218                 am65_cpsw_qos_link_down(ndev);
 219                 netif_tx_stop_all_queues(ndev);
 220         }
 221
 222         phy_print_status(phy);
 223 }
 224
 225 static int am65_cpsw_nuss_ndo_slave_add_vid(struct net_device *ndev,
 226                                             __be16 proto, u16 vid)
 227 {
 228         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 229         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 230         u32 port_mask, unreg_mcast = 0;
 231         int ret;
 232
 233         if (!common->is_emac_mode)
 234                 return 0;
 235
 236         if (!netif_running(ndev) || !vid)
 237                 return 0;
 238
 239         ret = pm_runtime_get_sync(common->dev);
 240         if (ret < 0) {
 241                 pm_runtime_put_noidle(common->dev);
 242                 return ret;
 243         }
 244
 245         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
 246         if (!vid)
 247                 unreg_mcast = port_mask;
 248         dev_info(common->dev, "Adding vlan %d to vlan filter\n", vid);
 249         ret = cpsw_ale_vlan_add_modify(common->ale, vid, port_mask,
 250                                        unreg_mcast, port_mask, 0);
 251
 252         pm_runtime_put(common->dev);
 253         return ret;
 254 }
 255
 256 static int am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device *ndev,
 257                                              __be16 proto, u16 vid)
 258 {
 259         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 260         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 261         int ret;
 262
 263         if (!common->is_emac_mode)
 264                 return 0;
 265
 266         if (!netif_running(ndev) || !vid)
 267                 return 0;
 268
 269         ret = pm_runtime_get_sync(common->dev);
 270         if (ret < 0) {
 271                 pm_runtime_put_noidle(common->dev);
 272                 return ret;
 273         }
 274
 275         dev_info(common->dev, "Removing vlan %d from vlan filter\n", vid);
 276         ret = cpsw_ale_del_vlan(common->ale, vid,
 277                                 BIT(port->port_id) | ALE_PORT_HOST);
 278
 279         pm_runtime_put(common->dev);
 280         return ret;
 281 }
 282
 283 static void am65_cpsw_slave_set_promisc(struct am65_cpsw_port *port,
 284                                         bool promisc)
 285 {
 286         struct am65_cpsw_common *common = port->common;
 287
 288         if (promisc && !common->is_emac_mode) {
 289                 dev_dbg(common->dev, "promisc mode requested in switch mode");
 290                 return;
 291         }
 292
 293         if (promisc) {
 294                 /* Enable promiscuous mode */
 295                 cpsw_ale_control_set(common->ale, port->port_id,
 296                                      ALE_PORT_MACONLY_CAF, 1);
 297                 dev_dbg(common->dev, "promisc enabled\n");
 298         } else {
 299                 /* Disable promiscuous mode */
 300                 cpsw_ale_control_set(common->ale, port->port_id,
 301                                      ALE_PORT_MACONLY_CAF, 0);
 302                 dev_dbg(common->dev, "promisc disabled\n");
 303         }
 304 }
 305
 306 static void am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device *ndev)
 307 {
 308         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 309         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 310         u32 port_mask;
 311         bool promisc;
 312
 313         promisc = !!(ndev->flags & IFF_PROMISC);
 314         am65_cpsw_slave_set_promisc(port, promisc);
 315
 316         if (promisc)
 317                 return;
 318
 319         /* Restore allmulti on vlans if necessary */
 320         cpsw_ale_set_allmulti(common->ale,
 321                               ndev->flags & IFF_ALLMULTI, port->port_id);
 322
 323         port_mask = ALE_PORT_HOST;
 324         /* Clear all mcast from ALE */
 325         cpsw_ale_flush_multicast(common->ale, port_mask, -1);
 326
 327         if (!netdev_mc_empty(ndev)) {
 328                 struct netdev_hw_addr *ha;
 329
 330                 /* program multicast address list into ALE register */
 331                 netdev_for_each_mc_addr(ha, ndev) {
 332                         cpsw_ale_add_mcast(common->ale, ha->addr,
 333                                            port_mask, 0, 0, 0);
 334                 }
 335         }
 336 }
 337
 338 static void am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device *ndev,
 339                                                unsigned int txqueue)
 340 {
 341         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 342         struct am65_cpsw_tx_chn *tx_chn;
 343         struct netdev_queue *netif_txq;
 344         unsigned long trans_start;
 345
 346         netif_txq = netdev_get_tx_queue(ndev, txqueue);
 347         tx_chn = &common->tx_chns[txqueue];
 348         trans_start = netif_txq->trans_start;
 349
 350         netdev_err(ndev, "txq:%d DRV_XOFF:%d tmo:%u dql_avail:%d free_desc:%zu\n",
 351                    txqueue,
 352                    netif_tx_queue_stopped(netif_txq),
 353                    jiffies_to_msecs(jiffies - trans_start),
 354                    dql_avail(&netif_txq->dql),
 355                    k3_cppi_desc_pool_avail(tx_chn->desc_pool));
 356
 357         if (netif_tx_queue_stopped(netif_txq)) {
 358                 /* try recover if stopped by us */
 359                 txq_trans_update(netif_txq);
 360                 netif_tx_wake_queue(netif_txq);
 361         }
 362 }
 363
 364 static int am65_cpsw_nuss_rx_push(struct am65_cpsw_common *common,
 365                                   struct sk_buff *skb)
 366 {
 367         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 368         struct cppi5_host_desc_t *desc_rx;
 369         struct device *dev = common->dev;
 370         u32 pkt_len = skb_tailroom(skb);
 371         dma_addr_t desc_dma;
 372         dma_addr_t buf_dma;
 373         void *swdata;
 374
 375         desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
 376         if (!desc_rx) {
 377                 dev_err(dev, "Failed to allocate RXFDQ descriptor\n");
 378                 return -ENOMEM;
 379         }
 380         desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
 381
 382         buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len,
 383                                  DMA_FROM_DEVICE);
 384         if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) {
 385                 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 386                 dev_err(dev, "Failed to map rx skb buffer\n");
 387                 return -EINVAL;
 388         }
 389
 390         cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
 391                          AM65_CPSW_NAV_PS_DATA_SIZE);
 392         k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma);
 393         cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb));
 394         swdata = cppi5_hdesc_get_swdata(desc_rx);
 395         *((void **)swdata) = skb;
 396
 397         return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma);
 398 }
 399
 400 void am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common *common)
 401 {
 402         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 403         u32 val, pri_map;
 404
 405         /* P0 set Receive Priority Type */
 406         val = readl(host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 407
 408         if (common->pf_p0_rx_ptype_rrobin) {
 409                 val |= AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 410                 /* Enet Ports fifos works in fixed priority mode only, so
 411                  * reset P0_Rx_Pri_Map so all packet will go in Enet fifo 0
 412                  */
 413                 pri_map = 0x0;
 414         } else {
 415                 val &= ~AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 416                 /* restore P0_Rx_Pri_Map */
 417                 pri_map = 0x76543210;
 418         }
 419
 420         writel(pri_map, host_p->port_base + AM65_CPSW_PORT_REG_RX_PRI_MAP);
 421         writel(val, host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 422 }
 423
 424 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common);
 425 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common);
 426 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port);
 427 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port);
 428
 429 static int am65_cpsw_nuss_common_open(struct am65_cpsw_common *common,
 430                                       netdev_features_t features)
 431 {
 432         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 433         int port_idx, i, ret;
 434         struct sk_buff *skb;
 435         u32 val, port_mask;
 436
 437         if (common->usage_count)
 438                 return 0;
 439
 440         /* Control register */
 441         writel(AM65_CPSW_CTL_P0_ENABLE | AM65_CPSW_CTL_P0_TX_CRC_REMOVE |
 442                AM65_CPSW_CTL_VLAN_AWARE | AM65_CPSW_CTL_P0_RX_PAD,
 443                common->cpsw_base + AM65_CPSW_REG_CTL);
 444         /* Max length register */
 445         writel(AM65_CPSW_MAX_PACKET_SIZE,
 446                host_p->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 447         /* set base flow_id */
 448         writel(common->rx_flow_id_base,
 449                host_p->port_base + AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET);
 450         /* en tx crc offload */
 451         writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN, host_p->port_base + AM65_CPSW_P0_REG_CTL);
 452
 453         am65_cpsw_nuss_set_p0_ptype(common);
 454
 455         /* enable statistic */
 456         val = BIT(HOST_PORT_NUM);
 457         for (port_idx = 0; port_idx < common->port_num; port_idx++) {
 458                 struct am65_cpsw_port *port = &common->ports[port_idx];
 459
 460                 if (!port->disabled)
 461                         val |=  BIT(port->port_id);
 462         }
 463         writel(val, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 464
 465         /* disable priority elevation */
 466         writel(0, common->cpsw_base + AM65_CPSW_REG_PTYPE);
 467
 468         cpsw_ale_start(common->ale);
 469
 470         /* limit to one RX flow only */
 471         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 472                              ALE_DEFAULT_THREAD_ID, 0);
 473         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 474                              ALE_DEFAULT_THREAD_ENABLE, 1);
 475         /* switch to vlan unaware mode */
 476         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 1);
 477         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 478                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 479
 480         /* default vlan cfg: create mask based on enabled ports */
 481         port_mask = GENMASK(common->port_num, 0) &
 482                     ~common->disabled_ports_mask;
 483
 484         cpsw_ale_add_vlan(common->ale, 0, port_mask,
 485                           port_mask, port_mask,
 486                           port_mask & ~ALE_PORT_HOST);
 487
 488         if (common->is_emac_mode)
 489                 am65_cpsw_init_host_port_emac(common);
 490         else
 491                 am65_cpsw_init_host_port_switch(common);
 492
 493         for (i = 0; i < common->rx_chns.descs_num; i++) {
 494                 skb = __netdev_alloc_skb_ip_align(NULL,
 495                                                   AM65_CPSW_MAX_PACKET_SIZE,
 496                                                   GFP_KERNEL);
 497                 if (!skb) {
 498                         dev_err(common->dev, "cannot allocate skb\n");
 499                         return -ENOMEM;
 500                 }
 501
 502                 ret = am65_cpsw_nuss_rx_push(common, skb);
 503                 if (ret < 0) {
 504                         dev_err(common->dev,
 505                                 "cannot submit skb to channel rx, error %d\n",
 506                                 ret);
 507                         kfree_skb(skb);
 508                         return ret;
 509                 }
 510                 kmemleak_not_leak(skb);
 511         }
 512         k3_udma_glue_enable_rx_chn(common->rx_chns.rx_chn);
 513
 514         for (i = 0; i < common->tx_ch_num; i++) {
 515                 ret = k3_udma_glue_enable_tx_chn(common->tx_chns[i].tx_chn);
 516                 if (ret)
 517                         return ret;
 518                 napi_enable(&common->tx_chns[i].napi_tx);
 519         }
 520
 521         napi_enable(&common->napi_rx);
 522         if (common->rx_irq_disabled) {
 523                 common->rx_irq_disabled = false;
 524                 enable_irq(common->rx_chns.irq);
 525         }
 526
 527         dev_dbg(common->dev, "cpsw_nuss started\n");
 528         return 0;
 529 }
 530
 531 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma);
 532 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma);
 533
 534 static int am65_cpsw_nuss_common_stop(struct am65_cpsw_common *common)
 535 {
 536         int i;
 537
 538         if (common->usage_count != 1)
 539                 return 0;
 540
 541         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 542                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 543
 544         /* shutdown tx channels */
 545         atomic_set(&common->tdown_cnt, common->tx_ch_num);
 546         /* ensure new tdown_cnt value is visible */
 547         smp_mb__after_atomic();
 548         reinit_completion(&common->tdown_complete);
 549
 550         for (i = 0; i < common->tx_ch_num; i++)
 551                 k3_udma_glue_tdown_tx_chn(common->tx_chns[i].tx_chn, false);
 552
 553         i = wait_for_completion_timeout(&common->tdown_complete,
 554                                         msecs_to_jiffies(1000));
 555         if (!i)
 556                 dev_err(common->dev, "tx timeout\n");
 557         for (i = 0; i < common->tx_ch_num; i++)
 558                 napi_disable(&common->tx_chns[i].napi_tx);
 559
 560         for (i = 0; i < common->tx_ch_num; i++) {
 561                 k3_udma_glue_reset_tx_chn(common->tx_chns[i].tx_chn,
 562                                           &common->tx_chns[i],
 563                                           am65_cpsw_nuss_tx_cleanup);
 564                 k3_udma_glue_disable_tx_chn(common->tx_chns[i].tx_chn);
 565         }
 566
 567         k3_udma_glue_tdown_rx_chn(common->rx_chns.rx_chn, true);
 568         napi_disable(&common->napi_rx);
 569
 570         for (i = 0; i < AM65_CPSW_MAX_RX_FLOWS; i++)
 571                 k3_udma_glue_reset_rx_chn(common->rx_chns.rx_chn, i,
 572                                           &common->rx_chns,
 573                                           am65_cpsw_nuss_rx_cleanup, !!i);
 574
 575         k3_udma_glue_disable_rx_chn(common->rx_chns.rx_chn);
 576
 577         cpsw_ale_stop(common->ale);
 578
 579         writel(0, common->cpsw_base + AM65_CPSW_REG_CTL);
 580         writel(0, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 581
 582         dev_dbg(common->dev, "cpsw_nuss stopped\n");
 583         return 0;
 584 }
 585
 586 static int am65_cpsw_nuss_ndo_slave_stop(struct net_device *ndev)
 587 {
 588         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 589         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 590         int ret;
 591
 592         if (port->slave.phy)
 593                 phy_stop(port->slave.phy);
 594
 595         netif_tx_stop_all_queues(ndev);
 596
 597         if (port->slave.phy) {
 598                 phy_disconnect(port->slave.phy);
 599                 port->slave.phy = NULL;
 600         }
 601
 602         ret = am65_cpsw_nuss_common_stop(common);
 603         if (ret)
 604                 return ret;
 605
 606         common->usage_count--;
 607         pm_runtime_put(common->dev);
 608         return 0;
 609 }
 610
 611 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
 612 {
 613         struct am65_cpsw_port *port = arg;
 614
 615         if (!vdev)
 616                 return 0;
 617
 618         return am65_cpsw_nuss_ndo_slave_add_vid(port->ndev, 0, vid);
 619 }
 620
 621 static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
 622 {
 623         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 624         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 625         int ret, i;
 626
 627         ret = pm_runtime_get_sync(common->dev);
 628         if (ret < 0) {
 629                 pm_runtime_put_noidle(common->dev);
 630                 return ret;
 631         }
 632
 633         /* Notify the stack of the actual queue counts. */
 634         ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num);
 635         if (ret) {
 636                 dev_err(common->dev, "cannot set real number of tx queues\n");
 637                 return ret;
 638         }
 639
 640         ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES);
 641         if (ret) {
 642                 dev_err(common->dev, "cannot set real number of rx queues\n");
 643                 return ret;
 644         }
 645
 646         for (i = 0; i < common->tx_ch_num; i++)
 647                 netdev_tx_reset_queue(netdev_get_tx_queue(ndev, i));
 648
 649         ret = am65_cpsw_nuss_common_open(common, ndev->features);
 650         if (ret)
 651                 return ret;
 652
 653         common->usage_count++;
 654
 655         am65_cpsw_port_set_sl_mac(port, ndev->dev_addr);
 656
 657         if (common->is_emac_mode)
 658                 am65_cpsw_init_port_emac_ale(port);
 659         else
 660                 am65_cpsw_init_port_switch_ale(port);
 661
 662         /* mac_sl should be configured via phy-link interface */
 663         am65_cpsw_sl_ctl_reset(port);
 664
 665         ret = phy_set_mode_ext(port->slave.ifphy, PHY_MODE_ETHERNET,
 666                                port->slave.phy_if);
 667         if (ret)
 668                 goto error_cleanup;
 669
 670         if (port->slave.phy_node) {
 671                 port->slave.phy = of_phy_connect(ndev,
 672                                                  port->slave.phy_node,
 673                                                  &am65_cpsw_nuss_adjust_link,
 674                                                  0, port->slave.phy_if);
 675                 if (!port->slave.phy) {
 676                         dev_err(common->dev, "phy %pOF not found on slave %d\n",
 677                                 port->slave.phy_node,
 678                                 port->port_id);
 679                         ret = -ENODEV;
 680                         goto error_cleanup;
 681                 }
 682         }
 683
 684         /* restore vlan configurations */
 685         vlan_for_each(ndev, cpsw_restore_vlans, port);
 686
 687         phy_attached_info(port->slave.phy);
 688         phy_start(port->slave.phy);
 689
 690         return 0;
 691
 692 error_cleanup:
 693         am65_cpsw_nuss_ndo_slave_stop(ndev);
 694         return ret;
 695 }
 696
 697 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)
 698 {
 699         struct am65_cpsw_rx_chn *rx_chn = data;
 700         struct cppi5_host_desc_t *desc_rx;
 701         struct sk_buff *skb;
 702         dma_addr_t buf_dma;
 703         u32 buf_dma_len;
 704         void **swdata;
 705
 706         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 707         swdata = cppi5_hdesc_get_swdata(desc_rx);
 708         skb = *swdata;
 709         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 710         k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
 711
 712         dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 713         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 714
 715         dev_kfree_skb_any(skb);
 716 }
 717
 718 static void am65_cpsw_nuss_rx_ts(struct sk_buff *skb, u32 *psdata)
 719 {
 720         struct skb_shared_hwtstamps *ssh;
 721         u64 ns;
 722
 723         ns = ((u64)psdata[1] << 32) | psdata[0];
 724
 725         ssh = skb_hwtstamps(skb);
 726         memset(ssh, 0, sizeof(*ssh));
 727         ssh->hwtstamp = ns_to_ktime(ns);
 728 }
 729
 730 /* RX psdata[2] word format - checksum information */
 731 #define AM65_CPSW_RX_PSD_CSUM_ADD       GENMASK(15, 0)
 732 #define AM65_CPSW_RX_PSD_CSUM_ERR       BIT(16)
 733 #define AM65_CPSW_RX_PSD_IS_FRAGMENT    BIT(17)
 734 #define AM65_CPSW_RX_PSD_IS_TCP         BIT(18)
 735 #define AM65_CPSW_RX_PSD_IPV6_VALID     BIT(19)
 736 #define AM65_CPSW_RX_PSD_IPV4_VALID     BIT(20)
 737
 738 static void am65_cpsw_nuss_rx_csum(struct sk_buff *skb, u32 csum_info)
 739 {
 740         /* HW can verify IPv4/IPv6 TCP/UDP packets checksum
 741          * csum information provides in psdata[2] word:
 742          * AM65_CPSW_RX_PSD_CSUM_ERR bit - indicates csum error
 743          * AM65_CPSW_RX_PSD_IPV6_VALID and AM65_CPSW_RX_PSD_IPV4_VALID
 744          * bits - indicates IPv4/IPv6 packet
 745          * AM65_CPSW_RX_PSD_IS_FRAGMENT bit - indicates fragmented packet
 746          * AM65_CPSW_RX_PSD_CSUM_ADD has value 0xFFFF for non fragmented packets
 747          * or csum value for fragmented packets if !AM65_CPSW_RX_PSD_CSUM_ERR
 748          */
 749         skb_checksum_none_assert(skb);
 750
 751         if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM)))
 752                 return;
 753
 754         if ((csum_info & (AM65_CPSW_RX_PSD_IPV6_VALID |
 755                           AM65_CPSW_RX_PSD_IPV4_VALID)) &&
 756                           !(csum_info & AM65_CPSW_RX_PSD_CSUM_ERR)) {
 757                 /* csum for fragmented packets is unsupported */
 758                 if (!(csum_info & AM65_CPSW_RX_PSD_IS_FRAGMENT))
 759                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 760         }
 761 }
 762
 763 static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common,
 764                                      u32 flow_idx)
 765 {
 766         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 767         u32 buf_dma_len, pkt_len, port_id = 0, csum_info;
 768         struct am65_cpsw_ndev_priv *ndev_priv;
 769         struct am65_cpsw_ndev_stats *stats;
 770         struct cppi5_host_desc_t *desc_rx;
 771         struct device *dev = common->dev;
 772         struct sk_buff *skb, *new_skb;
 773         dma_addr_t desc_dma, buf_dma;
 774         struct am65_cpsw_port *port;
 775         struct net_device *ndev;
 776         void **swdata;
 777         u32 *psdata;
 778         int ret = 0;
 779
 780         ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_idx, &desc_dma);
 781         if (ret) {
 782                 if (ret != -ENODATA)
 783                         dev_err(dev, "RX: pop chn fail %d\n", ret);
 784                 return ret;
 785         }
 786
 787         if (cppi5_desc_is_tdcm(desc_dma)) {
 788                 dev_dbg(dev, "%s RX tdown flow: %u\n", __func__, flow_idx);
 789                 return 0;
 790         }
 791
 792         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 793         dev_dbg(dev, "%s flow_idx: %u desc %pad\n",
 794                 __func__, flow_idx, &desc_dma);
 795
 796         swdata = cppi5_hdesc_get_swdata(desc_rx);
 797         skb = *swdata;
 798         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 799         k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
 800         pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
 801         cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
 802         dev_dbg(dev, "%s rx port_id:%d\n", __func__, port_id);
 803         port = am65_common_get_port(common, port_id);
 804         ndev = port->ndev;
 805         skb->dev = ndev;
 806
 807         psdata = cppi5_hdesc_get_psdata(desc_rx);
 808         /* add RX timestamp */
 809         if (port->rx_ts_enabled)
 810                 am65_cpsw_nuss_rx_ts(skb, psdata);
 811         csum_info = psdata[2];
 812         dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info);
 813
 814         dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 815
 816         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 817
 818         new_skb = netdev_alloc_skb_ip_align(ndev, AM65_CPSW_MAX_PACKET_SIZE);
 819         if (new_skb) {
 820                 ndev_priv = netdev_priv(ndev);
 821                 am65_cpsw_nuss_set_offload_fwd_mark(skb, ndev_priv->offload_fwd_mark);
 822                 skb_put(skb, pkt_len);
 823                 skb->protocol = eth_type_trans(skb, ndev);
 824                 am65_cpsw_nuss_rx_csum(skb, csum_info);
 825                 napi_gro_receive(&common->napi_rx, skb);
 826
 827                 stats = this_cpu_ptr(ndev_priv->stats);
 828
 829                 u64_stats_update_begin(&stats->syncp);
 830                 stats->rx_packets++;
 831                 stats->rx_bytes += pkt_len;
 832                 u64_stats_update_end(&stats->syncp);
 833                 kmemleak_not_leak(new_skb);
 834         } else {
 835                 ndev->stats.rx_dropped++;
 836                 new_skb = skb;
 837         }
 838
 839         if (netif_dormant(ndev)) {
 840                 dev_kfree_skb_any(new_skb);
 841                 ndev->stats.rx_dropped++;
 842                 return 0;
 843         }
 844
 845         ret = am65_cpsw_nuss_rx_push(common, new_skb);
 846         if (WARN_ON(ret < 0)) {
 847                 dev_kfree_skb_any(new_skb);
 848                 ndev->stats.rx_errors++;
 849                 ndev->stats.rx_dropped++;
 850         }
 851
 852         return ret;
 853 }
 854
 855 static int am65_cpsw_nuss_rx_poll(struct napi_struct *napi_rx, int budget)
 856 {
 857         struct am65_cpsw_common *common = am65_cpsw_napi_to_common(napi_rx);
 858         int flow = AM65_CPSW_MAX_RX_FLOWS;
 859         int cur_budget, ret;
 860         int num_rx = 0;
 861
 862         /* process every flow */
 863         while (flow--) {
 864                 cur_budget = budget - num_rx;
 865
 866                 while (cur_budget--) {
 867                         ret = am65_cpsw_nuss_rx_packets(common, flow);
 868                         if (ret)
 869                                 break;
 870                         num_rx++;
 871                 }
 872
 873                 if (num_rx >= budget)
 874                         break;
 875         }
 876
 877         dev_dbg(common->dev, "%s num_rx:%d %d\n", __func__, num_rx, budget);
 878
 879         if (num_rx < budget && napi_complete_done(napi_rx, num_rx)) {
 880                 if (common->rx_irq_disabled) {
 881                         common->rx_irq_disabled = false;
 882                         enable_irq(common->rx_chns.irq);
 883                 }
 884         }
 885
 886         return num_rx;
 887 }
 888
 889 static void am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn *tx_chn,
 890                                      struct cppi5_host_desc_t *desc)
 891 {
 892         struct cppi5_host_desc_t *first_desc, *next_desc;
 893         dma_addr_t buf_dma, next_desc_dma;
 894         u32 buf_dma_len;
 895
 896         first_desc = desc;
 897         next_desc = first_desc;
 898
 899         cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
 900         k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
 901
 902         dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE);
 903
 904         next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
 905         k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
 906         while (next_desc_dma) {
 907                 next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 908                                                        next_desc_dma);
 909                 cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
 910                 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
 911
 912                 dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len,
 913                                DMA_TO_DEVICE);
 914
 915                 next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
 916                 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
 917
 918                 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
 919         }
 920
 921         k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
 922 }
 923
 924 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma)
 925 {
 926         struct am65_cpsw_tx_chn *tx_chn = data;
 927         struct cppi5_host_desc_t *desc_tx;
 928         struct sk_buff *skb;
 929         void **swdata;
 930
 931         desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
 932         swdata = cppi5_hdesc_get_swdata(desc_tx);
 933         skb = *(swdata);
 934         am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 935
 936         dev_kfree_skb_any(skb);
 937 }
 938
 939 static struct sk_buff *
 940 am65_cpsw_nuss_tx_compl_packet(struct am65_cpsw_tx_chn *tx_chn,
 941                                dma_addr_t desc_dma)
 942 {
 943         struct am65_cpsw_ndev_priv *ndev_priv;
 944         struct am65_cpsw_ndev_stats *stats;
 945         struct cppi5_host_desc_t *desc_tx;
 946         struct net_device *ndev;
 947         struct sk_buff *skb;
 948         void **swdata;
 949
 950         desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 951                                              desc_dma);
 952         swdata = cppi5_hdesc_get_swdata(desc_tx);
 953         skb = *(swdata);
 954         am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 955
 956         ndev = skb->dev;
 957
 958         am65_cpts_tx_timestamp(tx_chn->common->cpts, skb);
 959
 960         ndev_priv = netdev_priv(ndev);
 961         stats = this_cpu_ptr(ndev_priv->stats);
 962         u64_stats_update_begin(&stats->syncp);
 963         stats->tx_packets++;
 964         stats->tx_bytes += skb->len;
 965         u64_stats_update_end(&stats->syncp);
 966
 967         return skb;
 968 }
 969
 970 static void am65_cpsw_nuss_tx_wake(struct am65_cpsw_tx_chn *tx_chn, struct net_device *ndev,
 971                                    struct netdev_queue *netif_txq)
 972 {
 973         if (netif_tx_queue_stopped(netif_txq)) {
 974                 /* Check whether the queue is stopped due to stalled
 975                  * tx dma, if the queue is stopped then wake the queue
 976                  * as we have free desc for tx
 977                  */
 978                 __netif_tx_lock(netif_txq, smp_processor_id());
 979                 if (netif_running(ndev) &&
 980                     (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS))
 981                         netif_tx_wake_queue(netif_txq);
 982
 983                 __netif_tx_unlock(netif_txq);
 984         }
 985 }
 986
 987 static int am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common *common,
 988                                            int chn, unsigned int budget)
 989 {
 990         struct device *dev = common->dev;
 991         struct am65_cpsw_tx_chn *tx_chn;
 992         struct netdev_queue *netif_txq;
 993         unsigned int total_bytes = 0;
 994         struct net_device *ndev;
 995         struct sk_buff *skb;
 996         dma_addr_t desc_dma;
 997         int res, num_tx = 0;
 998
 999         tx_chn = &common->tx_chns[chn];
1000
1001         while (true) {
1002                 spin_lock(&tx_chn->lock);
1003                 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
1004                 spin_unlock(&tx_chn->lock);
1005                 if (res == -ENODATA)
1006                         break;
1007
1008                 if (cppi5_desc_is_tdcm(desc_dma)) {
1009                         if (atomic_dec_and_test(&common->tdown_cnt))
1010                                 complete(&common->tdown_complete);
1011                         break;
1012                 }
1013
1014                 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
1015                 total_bytes = skb->len;
1016                 ndev = skb->dev;
1017                 napi_consume_skb(skb, budget);
1018                 num_tx++;
1019
1020                 netif_txq = netdev_get_tx_queue(ndev, chn);
1021
1022                 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
1023
1024                 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
1025         }
1026
1027         dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
1028
1029         return num_tx;
1030 }
1031
1032 static int am65_cpsw_nuss_tx_compl_packets_2g(struct am65_cpsw_common *common,
1033                                               int chn, unsigned int budget)
1034 {
1035         struct device *dev = common->dev;
1036         struct am65_cpsw_tx_chn *tx_chn;
1037         struct netdev_queue *netif_txq;
1038         unsigned int total_bytes = 0;
1039         struct net_device *ndev;
1040         struct sk_buff *skb;
1041         dma_addr_t desc_dma;
1042         int res, num_tx = 0;
1043
1044         tx_chn = &common->tx_chns[chn];
1045
1046         while (true) {
1047                 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
1048                 if (res == -ENODATA)
1049                         break;
1050
1051                 if (cppi5_desc_is_tdcm(desc_dma)) {
1052                         if (atomic_dec_and_test(&common->tdown_cnt))
1053                                 complete(&common->tdown_complete);
1054                         break;
1055                 }
1056
1057                 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
1058
1059                 ndev = skb->dev;
1060                 total_bytes += skb->len;
1061                 napi_consume_skb(skb, budget);
1062                 num_tx++;
1063         }
1064
1065         if (!num_tx)
1066                 return 0;
1067
1068         netif_txq = netdev_get_tx_queue(ndev, chn);
1069
1070         netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
1071
1072         am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
1073
1074         dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
1075
1076         return num_tx;
1077 }
1078
1079 static int am65_cpsw_nuss_tx_poll(struct napi_struct *napi_tx, int budget)
1080 {
1081         struct am65_cpsw_tx_chn *tx_chn = am65_cpsw_napi_to_tx_chn(napi_tx);
1082         int num_tx;
1083
1084         if (AM65_CPSW_IS_CPSW2G(tx_chn->common))
1085                 num_tx = am65_cpsw_nuss_tx_compl_packets_2g(tx_chn->common, tx_chn->id, budget);
1086         else
1087                 num_tx = am65_cpsw_nuss_tx_compl_packets(tx_chn->common, tx_chn->id, budget);
1088
1089         if (num_tx >= budget)
1090                 return budget;
1091
1092         if (napi_complete_done(napi_tx, num_tx))
1093                 enable_irq(tx_chn->irq);
1094
1095         return 0;
1096 }
1097
1098 static irqreturn_t am65_cpsw_nuss_rx_irq(int irq, void *dev_id)
1099 {
1100         struct am65_cpsw_common *common = dev_id;
1101
1102         common->rx_irq_disabled = true;
1103         disable_irq_nosync(irq);
1104         napi_schedule(&common->napi_rx);
1105
1106         return IRQ_HANDLED;
1107 }
1108
1109 static irqreturn_t am65_cpsw_nuss_tx_irq(int irq, void *dev_id)
1110 {
1111         struct am65_cpsw_tx_chn *tx_chn = dev_id;
1112
1113         disable_irq_nosync(irq);
1114         napi_schedule(&tx_chn->napi_tx);
1115
1116         return IRQ_HANDLED;
1117 }
1118
1119 static netdev_tx_t am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff *skb,
1120                                                  struct net_device *ndev)
1121 {
1122         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1123         struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
1124         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1125         struct device *dev = common->dev;
1126         struct am65_cpsw_tx_chn *tx_chn;
1127         struct netdev_queue *netif_txq;
1128         dma_addr_t desc_dma, buf_dma;
1129         int ret, q_idx, i;
1130         void **swdata;
1131         u32 *psdata;
1132         u32 pkt_len;
1133
1134         /* padding enabled in hw */
1135         pkt_len = skb_headlen(skb);
1136
1137         /* SKB TX timestamp */
1138         if (port->tx_ts_enabled)
1139                 am65_cpts_prep_tx_timestamp(common->cpts, skb);
1140
1141         q_idx = skb_get_queue_mapping(skb);
1142         dev_dbg(dev, "%s skb_queue:%d\n", __func__, q_idx);
1143
1144         tx_chn = &common->tx_chns[q_idx];
1145         netif_txq = netdev_get_tx_queue(ndev, q_idx);
1146
1147         /* Map the linear buffer */
1148         buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len,
1149                                  DMA_TO_DEVICE);
1150         if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1151                 dev_err(dev, "Failed to map tx skb buffer\n");
1152                 ndev->stats.tx_errors++;
1153                 goto err_free_skb;
1154         }
1155
1156         first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1157         if (!first_desc) {
1158                 dev_dbg(dev, "Failed to allocate descriptor\n");
1159                 dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len,
1160                                  DMA_TO_DEVICE);
1161                 goto busy_stop_q;
1162         }
1163
1164         cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
1165                          AM65_CPSW_NAV_PS_DATA_SIZE);
1166         cppi5_desc_set_pktids(&first_desc->hdr, 0, 0x3FFF);
1167         cppi5_hdesc_set_pkttype(first_desc, 0x7);
1168         cppi5_desc_set_tags_ids(&first_desc->hdr, 0, port->port_id);
1169
1170         k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1171         cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
1172         swdata = cppi5_hdesc_get_swdata(first_desc);
1173         *(swdata) = skb;
1174         psdata = cppi5_hdesc_get_psdata(first_desc);
1175
1176         /* HW csum offload if enabled */
1177         psdata[2] = 0;
1178         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1179                 unsigned int cs_start, cs_offset;
1180
1181                 cs_start = skb_transport_offset(skb);
1182                 cs_offset = cs_start + skb->csum_offset;
1183                 /* HW numerates bytes starting from 1 */
1184                 psdata[2] = ((cs_offset + 1) << 24) |
1185                             ((cs_start + 1) << 16) | (skb->len - cs_start);
1186                 dev_dbg(dev, "%s tx psdata:%#x\n", __func__, psdata[2]);
1187         }
1188
1189         if (!skb_is_nonlinear(skb))
1190                 goto done_tx;
1191
1192         dev_dbg(dev, "fragmented SKB\n");
1193
1194         /* Handle the case where skb is fragmented in pages */
1195         cur_desc = first_desc;
1196         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1197                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1198                 u32 frag_size = skb_frag_size(frag);
1199
1200                 next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1201                 if (!next_desc) {
1202                         dev_err(dev, "Failed to allocate descriptor\n");
1203                         goto busy_free_descs;
1204                 }
1205
1206                 buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size,
1207                                            DMA_TO_DEVICE);
1208                 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1209                         dev_err(dev, "Failed to map tx skb page\n");
1210                         k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
1211                         ndev->stats.tx_errors++;
1212                         goto err_free_descs;
1213                 }
1214
1215                 cppi5_hdesc_reset_hbdesc(next_desc);
1216                 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1217                 cppi5_hdesc_attach_buf(next_desc,
1218                                        buf_dma, frag_size, buf_dma, frag_size);
1219
1220                 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
1221                                                       next_desc);
1222                 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma);
1223                 cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
1224
1225                 pkt_len += frag_size;
1226                 cur_desc = next_desc;
1227         }
1228         WARN_ON(pkt_len != skb->len);
1229
1230 done_tx:
1231         skb_tx_timestamp(skb);
1232
1233         /* report bql before sending packet */
1234         netdev_tx_sent_queue(netif_txq, pkt_len);
1235
1236         cppi5_hdesc_set_pktlen(first_desc, pkt_len);
1237         desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
1238         if (AM65_CPSW_IS_CPSW2G(common)) {
1239                 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1240         } else {
1241                 spin_lock_bh(&tx_chn->lock);
1242                 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1243                 spin_unlock_bh(&tx_chn->lock);
1244         }
1245         if (ret) {
1246                 dev_err(dev, "can't push desc %d\n", ret);
1247                 /* inform bql */
1248                 netdev_tx_completed_queue(netif_txq, 1, pkt_len);
1249                 ndev->stats.tx_errors++;
1250                 goto err_free_descs;
1251         }
1252
1253         if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
1254                 netif_tx_stop_queue(netif_txq);
1255                 /* Barrier, so that stop_queue visible to other cpus */
1256                 smp_mb__after_atomic();
1257                 dev_dbg(dev, "netif_tx_stop_queue %d\n", q_idx);
1258
1259                 /* re-check for smp */
1260                 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
1261                     MAX_SKB_FRAGS) {
1262                         netif_tx_wake_queue(netif_txq);
1263                         dev_dbg(dev, "netif_tx_wake_queue %d\n", q_idx);
1264                 }
1265         }
1266
1267         return NETDEV_TX_OK;
1268
1269 err_free_descs:
1270         am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1271 err_free_skb:
1272         ndev->stats.tx_dropped++;
1273         dev_kfree_skb_any(skb);
1274         return NETDEV_TX_OK;
1275
1276 busy_free_descs:
1277         am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1278 busy_stop_q:
1279         netif_tx_stop_queue(netif_txq);
1280         return NETDEV_TX_BUSY;
1281 }
1282
1283 static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev,
1284                                                     void *addr)
1285 {
1286         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1287         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1288         struct sockaddr *sockaddr = (struct sockaddr *)addr;
1289         int ret;
1290
1291         ret = eth_prepare_mac_addr_change(ndev, addr);
1292         if (ret < 0)
1293                 return ret;
1294
1295         ret = pm_runtime_get_sync(common->dev);
1296         if (ret < 0) {
1297                 pm_runtime_put_noidle(common->dev);
1298                 return ret;
1299         }
1300
1301         cpsw_ale_del_ucast(common->ale, ndev->dev_addr,
1302                            HOST_PORT_NUM, 0, 0);
1303         cpsw_ale_add_ucast(common->ale, sockaddr->sa_data,
1304                            HOST_PORT_NUM, ALE_SECURE, 0);
1305
1306         am65_cpsw_port_set_sl_mac(port, addr);
1307         eth_commit_mac_addr_change(ndev, sockaddr);
1308
1309         pm_runtime_put(common->dev);
1310
1311         return 0;
1312 }
1313
1314 static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev,
1315                                        struct ifreq *ifr)
1316 {
1317         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1318         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1319         u32 ts_ctrl, seq_id, ts_ctrl_ltype2, ts_vlan_ltype;
1320         struct hwtstamp_config cfg;
1321
1322         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1323                 return -EOPNOTSUPP;
1324
1325         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1326                 return -EFAULT;
1327
1328         /* TX HW timestamp */
1329         switch (cfg.tx_type) {
1330         case HWTSTAMP_TX_OFF:
1331         case HWTSTAMP_TX_ON:
1332                 break;
1333         default:
1334                 return -ERANGE;
1335         }
1336
1337         switch (cfg.rx_filter) {
1338         case HWTSTAMP_FILTER_NONE:
1339                 port->rx_ts_enabled = false;
1340                 break;
1341         case HWTSTAMP_FILTER_ALL:
1342         case HWTSTAMP_FILTER_SOME:
1343         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1344         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1345         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1346         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1347         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1348         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1349         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1350         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1351         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1352         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1353         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1354         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1355         case HWTSTAMP_FILTER_NTP_ALL:
1356                 port->rx_ts_enabled = true;
1357                 cfg.rx_filter = HWTSTAMP_FILTER_ALL;
1358                 break;
1359         default:
1360                 return -ERANGE;
1361         }
1362
1363         port->tx_ts_enabled = (cfg.tx_type == HWTSTAMP_TX_ON);
1364
1365         /* cfg TX timestamp */
1366         seq_id = (AM65_CPSW_TS_SEQ_ID_OFFSET <<
1367                   AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT) | ETH_P_1588;
1368
1369         ts_vlan_ltype = ETH_P_8021Q;
1370
1371         ts_ctrl_ltype2 = ETH_P_1588 |
1372                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 |
1373                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 |
1374                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 |
1375                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 |
1376                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 |
1377                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 |
1378                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 |
1379                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO;
1380
1381         ts_ctrl = AM65_CPSW_TS_EVENT_MSG_TYPE_BITS <<
1382                   AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT;
1383
1384         if (port->tx_ts_enabled)
1385                 ts_ctrl |= AM65_CPSW_TS_TX_ANX_ALL_EN |
1386                            AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN;
1387
1388         writel(seq_id, port->port_base + AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG);
1389         writel(ts_vlan_ltype, port->port_base +
1390                AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG);
1391         writel(ts_ctrl_ltype2, port->port_base +
1392                AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2);
1393         writel(ts_ctrl, port->port_base + AM65_CPSW_PORTN_REG_TS_CTL);
1394
1395         /* en/dis RX timestamp */
1396         am65_cpts_rx_enable(common->cpts, port->rx_ts_enabled);
1397
1398         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1399 }
1400
1401 static int am65_cpsw_nuss_hwtstamp_get(struct net_device *ndev,
1402                                        struct ifreq *ifr)
1403 {
1404         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1405         struct hwtstamp_config cfg;
1406
1407         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1408                 return -EOPNOTSUPP;
1409
1410         cfg.flags = 0;
1411         cfg.tx_type = port->tx_ts_enabled ?
1412                       HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
1413         cfg.rx_filter = port->rx_ts_enabled ?
1414                         HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
1415
1416         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1417 }
1418
1419 static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev,
1420                                           struct ifreq *req, int cmd)
1421 {
1422         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1423
1424         if (!netif_running(ndev))
1425                 return -EINVAL;
1426
1427         switch (cmd) {
1428         case SIOCSHWTSTAMP:
1429                 return am65_cpsw_nuss_hwtstamp_set(ndev, req);
1430         case SIOCGHWTSTAMP:
1431                 return am65_cpsw_nuss_hwtstamp_get(ndev, req);
1432         }
1433
1434         if (!port->slave.phy)
1435                 return -EOPNOTSUPP;
1436
1437         return phy_mii_ioctl(port->slave.phy, req, cmd);
1438 }
1439
1440 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev,
1441                                          struct rtnl_link_stats64 *stats)
1442 {
1443         struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev);
1444         unsigned int start;
1445         int cpu;
1446
1447         for_each_possible_cpu(cpu) {
1448                 struct am65_cpsw_ndev_stats *cpu_stats;
1449                 u64 rx_packets;
1450                 u64 rx_bytes;
1451                 u64 tx_packets;
1452                 u64 tx_bytes;
1453
1454                 cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu);
1455                 do {
1456                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1457                         rx_packets = cpu_stats->rx_packets;
1458                         rx_bytes   = cpu_stats->rx_bytes;
1459                         tx_packets = cpu_stats->tx_packets;
1460                         tx_bytes   = cpu_stats->tx_bytes;
1461                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1462
1463                 stats->rx_packets += rx_packets;
1464                 stats->rx_bytes   += rx_bytes;
1465                 stats->tx_packets += tx_packets;
1466                 stats->tx_bytes   += tx_bytes;
1467         }
1468
1469         stats->rx_errors        = dev->stats.rx_errors;
1470         stats->rx_dropped       = dev->stats.rx_dropped;
1471         stats->tx_dropped       = dev->stats.tx_dropped;
1472 }
1473
1474 static struct devlink_port *am65_cpsw_ndo_get_devlink_port(struct net_device *ndev)
1475 {
1476         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1477
1478         return &port->devlink_port;
1479 }
1480
1481 static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
1482         .ndo_open               = am65_cpsw_nuss_ndo_slave_open,
1483         .ndo_stop               = am65_cpsw_nuss_ndo_slave_stop,
1484         .ndo_start_xmit         = am65_cpsw_nuss_ndo_slave_xmit,
1485         .ndo_set_rx_mode        = am65_cpsw_nuss_ndo_slave_set_rx_mode,
1486         .ndo_get_stats64        = am65_cpsw_nuss_ndo_get_stats,
1487         .ndo_validate_addr      = eth_validate_addr,
1488         .ndo_set_mac_address    = am65_cpsw_nuss_ndo_slave_set_mac_address,
1489         .ndo_tx_timeout         = am65_cpsw_nuss_ndo_host_tx_timeout,
1490         .ndo_vlan_rx_add_vid    = am65_cpsw_nuss_ndo_slave_add_vid,
1491         .ndo_vlan_rx_kill_vid   = am65_cpsw_nuss_ndo_slave_kill_vid,
1492         .ndo_eth_ioctl          = am65_cpsw_nuss_ndo_slave_ioctl,
1493         .ndo_setup_tc           = am65_cpsw_qos_ndo_setup_tc,
1494         .ndo_get_devlink_port   = am65_cpsw_ndo_get_devlink_port,
1495 };
1496
1497 static void am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port *port)
1498 {
1499         struct am65_cpsw_common *common = port->common;
1500
1501         if (!port->disabled)
1502                 return;
1503
1504         cpsw_ale_control_set(common->ale, port->port_id,
1505                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1506
1507         cpsw_sl_reset(port->slave.mac_sl, 100);
1508         cpsw_sl_ctl_reset(port->slave.mac_sl);
1509 }
1510
1511 static void am65_cpsw_nuss_free_tx_chns(void *data)
1512 {
1513         struct am65_cpsw_common *common = data;
1514         int i;
1515
1516         for (i = 0; i < common->tx_ch_num; i++) {
1517                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1518
1519                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1520                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1521
1522                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1523                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1524
1525                 memset(tx_chn, 0, sizeof(*tx_chn));
1526         }
1527 }
1528
1529 void am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common *common)
1530 {
1531         struct device *dev = common->dev;
1532         int i;
1533
1534         devm_remove_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1535
1536         for (i = 0; i < common->tx_ch_num; i++) {
1537                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1538
1539                 if (tx_chn->irq)
1540                         devm_free_irq(dev, tx_chn->irq, tx_chn);
1541
1542                 netif_napi_del(&tx_chn->napi_tx);
1543
1544                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1545                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1546
1547                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1548                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1549
1550                 memset(tx_chn, 0, sizeof(*tx_chn));
1551         }
1552 }
1553
1554 static int am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common *common)
1555 {
1556         u32  max_desc_num = ALIGN(AM65_CPSW_MAX_TX_DESC, MAX_SKB_FRAGS);
1557         struct k3_udma_glue_tx_channel_cfg tx_cfg = { 0 };
1558         struct device *dev = common->dev;
1559         struct k3_ring_cfg ring_cfg = {
1560                 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1561                 .mode = K3_RINGACC_RING_MODE_RING,
1562                 .flags = 0
1563         };
1564         u32 hdesc_size;
1565         int i, ret = 0;
1566
1567         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1568                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1569
1570         tx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1571         tx_cfg.tx_cfg = ring_cfg;
1572         tx_cfg.txcq_cfg = ring_cfg;
1573         tx_cfg.tx_cfg.size = max_desc_num;
1574         tx_cfg.txcq_cfg.size = max_desc_num;
1575
1576         for (i = 0; i < common->tx_ch_num; i++) {
1577                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1578
1579                 snprintf(tx_chn->tx_chn_name,
1580                          sizeof(tx_chn->tx_chn_name), "tx%d", i);
1581
1582                 spin_lock_init(&tx_chn->lock);
1583                 tx_chn->common = common;
1584                 tx_chn->id = i;
1585                 tx_chn->descs_num = max_desc_num;
1586
1587                 tx_chn->tx_chn =
1588                         k3_udma_glue_request_tx_chn(dev,
1589                                                     tx_chn->tx_chn_name,
1590                                                     &tx_cfg);
1591                 if (IS_ERR(tx_chn->tx_chn)) {
1592                         ret = dev_err_probe(dev, PTR_ERR(tx_chn->tx_chn),
1593                                             "Failed to request tx dma channel\n");
1594                         goto err;
1595                 }
1596                 tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn);
1597
1598                 tx_chn->desc_pool = k3_cppi_desc_pool_create_name(tx_chn->dma_dev,
1599                                                                   tx_chn->descs_num,
1600                                                                   hdesc_size,
1601                                                                   tx_chn->tx_chn_name);
1602                 if (IS_ERR(tx_chn->desc_pool)) {
1603                         ret = PTR_ERR(tx_chn->desc_pool);
1604                         dev_err(dev, "Failed to create poll %d\n", ret);
1605                         goto err;
1606                 }
1607
1608                 tx_chn->irq = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
1609                 if (tx_chn->irq <= 0) {
1610                         dev_err(dev, "Failed to get tx dma irq %d\n",
1611                                 tx_chn->irq);
1612                         goto err;
1613                 }
1614
1615                 snprintf(tx_chn->tx_chn_name,
1616                          sizeof(tx_chn->tx_chn_name), "%s-tx%d",
1617                          dev_name(dev), tx_chn->id);
1618         }
1619
1620 err:
1621         i = devm_add_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1622         if (i) {
1623                 dev_err(dev, "Failed to add free_tx_chns action %d\n", i);
1624                 return i;
1625         }
1626
1627         return ret;
1628 }
1629
1630 static void am65_cpsw_nuss_free_rx_chns(void *data)
1631 {
1632         struct am65_cpsw_common *common = data;
1633         struct am65_cpsw_rx_chn *rx_chn;
1634
1635         rx_chn = &common->rx_chns;
1636
1637         if (!IS_ERR_OR_NULL(rx_chn->desc_pool))
1638                 k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
1639
1640         if (!IS_ERR_OR_NULL(rx_chn->rx_chn))
1641                 k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
1642 }
1643
1644 static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
1645 {
1646         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
1647         struct k3_udma_glue_rx_channel_cfg rx_cfg = { 0 };
1648         u32  max_desc_num = AM65_CPSW_MAX_RX_DESC;
1649         struct device *dev = common->dev;
1650         u32 hdesc_size;
1651         u32 fdqring_id;
1652         int i, ret = 0;
1653
1654         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1655                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1656
1657         rx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1658         rx_cfg.flow_id_num = AM65_CPSW_MAX_RX_FLOWS;
1659         rx_cfg.flow_id_base = common->rx_flow_id_base;
1660
1661         /* init all flows */
1662         rx_chn->dev = dev;
1663         rx_chn->descs_num = max_desc_num;
1664
1665         rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, "rx", &rx_cfg);
1666         if (IS_ERR(rx_chn->rx_chn)) {
1667                 ret = dev_err_probe(dev, PTR_ERR(rx_chn->rx_chn),
1668                                     "Failed to request rx dma channel\n");
1669                 goto err;
1670         }
1671         rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn);
1672
1673         rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev,
1674                                                           rx_chn->descs_num,
1675                                                           hdesc_size, "rx");
1676         if (IS_ERR(rx_chn->desc_pool)) {
1677                 ret = PTR_ERR(rx_chn->desc_pool);
1678                 dev_err(dev, "Failed to create rx poll %d\n", ret);
1679                 goto err;
1680         }
1681
1682         common->rx_flow_id_base =
1683                         k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
1684         dev_info(dev, "set new flow-id-base %u\n", common->rx_flow_id_base);
1685
1686         fdqring_id = K3_RINGACC_RING_ID_ANY;
1687         for (i = 0; i < rx_cfg.flow_id_num; i++) {
1688                 struct k3_ring_cfg rxring_cfg = {
1689                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1690                         .mode = K3_RINGACC_RING_MODE_RING,
1691                         .flags = 0,
1692                 };
1693                 struct k3_ring_cfg fdqring_cfg = {
1694                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1695                         .flags = K3_RINGACC_RING_SHARED,
1696                 };
1697                 struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
1698                         .rx_cfg = rxring_cfg,
1699                         .rxfdq_cfg = fdqring_cfg,
1700                         .ring_rxq_id = K3_RINGACC_RING_ID_ANY,
1701                         .src_tag_lo_sel =
1702                                 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
1703                 };
1704
1705                 rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
1706                 rx_flow_cfg.rx_cfg.size = max_desc_num;
1707                 rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
1708                 rx_flow_cfg.rxfdq_cfg.mode = common->pdata.fdqring_mode;
1709
1710                 ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
1711                                                 i, &rx_flow_cfg);
1712                 if (ret) {
1713                         dev_err(dev, "Failed to init rx flow%d %d\n", i, ret);
1714                         goto err;
1715                 }
1716                 if (!i)
1717                         fdqring_id =
1718                                 k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
1719                                                                 i);
1720
1721                 rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
1722
1723                 if (rx_chn->irq <= 0) {
1724                         dev_err(dev, "Failed to get rx dma irq %d\n",
1725                                 rx_chn->irq);
1726                         ret = -ENXIO;
1727                         goto err;
1728                 }
1729         }
1730
1731 err:
1732         i = devm_add_action(dev, am65_cpsw_nuss_free_rx_chns, common);
1733         if (i) {
1734                 dev_err(dev, "Failed to add free_rx_chns action %d\n", i);
1735                 return i;
1736         }
1737
1738         return ret;
1739 }
1740
1741 static int am65_cpsw_nuss_init_host_p(struct am65_cpsw_common *common)
1742 {
1743         struct am65_cpsw_host *host_p = am65_common_get_host(common);
1744
1745         host_p->common = common;
1746         host_p->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE;
1747         host_p->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE;
1748
1749         return 0;
1750 }
1751
1752 static int am65_cpsw_am654_get_efuse_macid(struct device_node *of_node,
1753                                            int slave, u8 *mac_addr)
1754 {
1755         u32 mac_lo, mac_hi, offset;
1756         struct regmap *syscon;
1757         int ret;
1758
1759         syscon = syscon_regmap_lookup_by_phandle(of_node, "ti,syscon-efuse");
1760         if (IS_ERR(syscon)) {
1761                 if (PTR_ERR(syscon) == -ENODEV)
1762                         return 0;
1763                 return PTR_ERR(syscon);
1764         }
1765
1766         ret = of_property_read_u32_index(of_node, "ti,syscon-efuse", 1,
1767                                          &offset);
1768         if (ret)
1769                 return ret;
1770
1771         regmap_read(syscon, offset, &mac_lo);
1772         regmap_read(syscon, offset + 4, &mac_hi);
1773
1774         mac_addr[0] = (mac_hi >> 8) & 0xff;
1775         mac_addr[1] = mac_hi & 0xff;
1776         mac_addr[2] = (mac_lo >> 24) & 0xff;
1777         mac_addr[3] = (mac_lo >> 16) & 0xff;
1778         mac_addr[4] = (mac_lo >> 8) & 0xff;
1779         mac_addr[5] = mac_lo & 0xff;
1780
1781         return 0;
1782 }
1783
1784 static int am65_cpsw_init_cpts(struct am65_cpsw_common *common)
1785 {
1786         struct device *dev = common->dev;
1787         struct device_node *node;
1788         struct am65_cpts *cpts;
1789         void __iomem *reg_base;
1790
1791         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1792                 return 0;
1793
1794         node = of_get_child_by_name(dev->of_node, "cpts");
1795         if (!node) {
1796                 dev_err(dev, "%s cpts not found\n", __func__);
1797                 return -ENOENT;
1798         }
1799
1800         reg_base = common->cpsw_base + AM65_CPSW_NU_CPTS_BASE;
1801         cpts = am65_cpts_create(dev, reg_base, node);
1802         if (IS_ERR(cpts)) {
1803                 int ret = PTR_ERR(cpts);
1804
1805                 if (ret == -EOPNOTSUPP) {
1806                         dev_info(dev, "cpts disabled\n");
1807                         return 0;
1808                 }
1809
1810                 dev_err(dev, "cpts create err %d\n", ret);
1811                 return ret;
1812         }
1813         common->cpts = cpts;
1814         /* Forbid PM runtime if CPTS is running.
1815          * K3 CPSWxG modules may completely lose context during ON->OFF
1816          * transitions depending on integration.
1817          * AM65x/J721E MCU CPSW2G: false
1818          * J721E MAIN_CPSW9G: true
1819          */
1820         pm_runtime_forbid(dev);
1821
1822         return 0;
1823 }
1824
1825 static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
1826 {
1827         struct device_node *node, *port_np;
1828         struct device *dev = common->dev;
1829         int ret;
1830
1831         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
1832         if (!node)
1833                 return -ENOENT;
1834
1835         for_each_child_of_node(node, port_np) {
1836                 struct am65_cpsw_port *port;
1837                 u32 port_id;
1838
1839                 /* it is not a slave port node, continue */
1840                 if (strcmp(port_np->name, "port"))
1841                         continue;
1842
1843                 ret = of_property_read_u32(port_np, "reg", &port_id);
1844                 if (ret < 0) {
1845                         dev_err(dev, "%pOF error reading port_id %d\n",
1846                                 port_np, ret);
1847                         return ret;
1848                 }
1849
1850                 if (!port_id || port_id > common->port_num) {
1851                         dev_err(dev, "%pOF has invalid port_id %u %s\n",
1852                                 port_np, port_id, port_np->name);
1853                         return -EINVAL;
1854                 }
1855
1856                 port = am65_common_get_port(common, port_id);
1857                 port->port_id = port_id;
1858                 port->common = common;
1859                 port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE +
1860                                   AM65_CPSW_NU_PORTS_OFFSET * (port_id);
1861                 port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE +
1862                                   (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id);
1863                 port->name = of_get_property(port_np, "label", NULL);
1864                 port->fetch_ram_base =
1865                                 common->cpsw_base + AM65_CPSW_NU_FRAM_BASE +
1866                                 (AM65_CPSW_NU_FRAM_PORT_OFFSET * (port_id - 1));
1867
1868                 port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base);
1869                 if (IS_ERR(port->slave.mac_sl))
1870                         return PTR_ERR(port->slave.mac_sl);
1871
1872                 port->disabled = !of_device_is_available(port_np);
1873                 if (port->disabled) {
1874                         common->disabled_ports_mask |= BIT(port->port_id);
1875                         continue;
1876                 }
1877
1878                 port->slave.ifphy = devm_of_phy_get(dev, port_np, NULL);
1879                 if (IS_ERR(port->slave.ifphy)) {
1880                         ret = PTR_ERR(port->slave.ifphy);
1881                         dev_err(dev, "%pOF error retrieving port phy: %d\n",
1882                                 port_np, ret);
1883                         return ret;
1884                 }
1885
1886                 port->slave.mac_only =
1887                                 of_property_read_bool(port_np, "ti,mac-only");
1888
1889                 /* get phy/link info */
1890                 if (of_phy_is_fixed_link(port_np)) {
1891                         ret = of_phy_register_fixed_link(port_np);
1892                         if (ret)
1893                                 return dev_err_probe(dev, ret,
1894                                                      "failed to register fixed-link phy %pOF\n",
1895                                                      port_np);
1896                         port->slave.phy_node = of_node_get(port_np);
1897                 } else {
1898                         port->slave.phy_node =
1899                                 of_parse_phandle(port_np, "phy-handle", 0);
1900                 }
1901
1902                 if (!port->slave.phy_node) {
1903                         dev_err(dev,
1904                                 "slave[%d] no phy found\n", port_id);
1905                         return -ENODEV;
1906                 }
1907
1908                 ret = of_get_phy_mode(port_np, &port->slave.phy_if);
1909                 if (ret) {
1910                         dev_err(dev, "%pOF read phy-mode err %d\n",
1911                                 port_np, ret);
1912                         return ret;
1913                 }
1914
1915                 ret = of_get_mac_address(port_np, port->slave.mac_addr);
1916                 if (ret) {
1917                         am65_cpsw_am654_get_efuse_macid(port_np,
1918                                                         port->port_id,
1919                                                         port->slave.mac_addr);
1920                         if (!is_valid_ether_addr(port->slave.mac_addr)) {
1921                                 eth_random_addr(port->slave.mac_addr);
1922                                 dev_err(dev, "Use random MAC address\n");
1923                         }
1924                 }
1925         }
1926         of_node_put(node);
1927
1928         /* is there at least one ext.port */
1929         if (!(~common->disabled_ports_mask & GENMASK(common->port_num, 1))) {
1930                 dev_err(dev, "No Ext. port are available\n");
1931                 return -ENODEV;
1932         }
1933
1934         return 0;
1935 }
1936
1937 static void am65_cpsw_pcpu_stats_free(void *data)
1938 {
1939         struct am65_cpsw_ndev_stats __percpu *stats = data;
1940
1941         free_percpu(stats);
1942 }
1943
1944 static int
1945 am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
1946 {
1947         struct am65_cpsw_ndev_priv *ndev_priv;
1948         struct device *dev = common->dev;
1949         struct am65_cpsw_port *port;
1950         int ret;
1951
1952         port = &common->ports[port_idx];
1953
1954         if (port->disabled)
1955                 return 0;
1956
1957         /* alloc netdev */
1958         port->ndev = devm_alloc_etherdev_mqs(common->dev,
1959                                              sizeof(struct am65_cpsw_ndev_priv),
1960                                              AM65_CPSW_MAX_TX_QUEUES,
1961                                              AM65_CPSW_MAX_RX_QUEUES);
1962         if (!port->ndev) {
1963                 dev_err(dev, "error allocating slave net_device %u\n",
1964                         port->port_id);
1965                 return -ENOMEM;
1966         }
1967
1968         ndev_priv = netdev_priv(port->ndev);
1969         ndev_priv->port = port;
1970         ndev_priv->msg_enable = AM65_CPSW_DEBUG;
1971         SET_NETDEV_DEV(port->ndev, dev);
1972
1973         eth_hw_addr_set(port->ndev, port->slave.mac_addr);
1974
1975         port->ndev->min_mtu = AM65_CPSW_MIN_PACKET_SIZE;
1976         port->ndev->max_mtu = AM65_CPSW_MAX_PACKET_SIZE;
1977         port->ndev->hw_features = NETIF_F_SG |
1978                                   NETIF_F_RXCSUM |
1979                                   NETIF_F_HW_CSUM |
1980                                   NETIF_F_HW_TC;
1981         port->ndev->features = port->ndev->hw_features |
1982                                NETIF_F_HW_VLAN_CTAG_FILTER;
1983         port->ndev->vlan_features |=  NETIF_F_SG;
1984         port->ndev->netdev_ops = &am65_cpsw_nuss_netdev_ops;
1985         port->ndev->ethtool_ops = &am65_cpsw_ethtool_ops_slave;
1986
1987         /* Disable TX checksum offload by default due to HW bug */
1988         if (common->pdata.quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM)
1989                 port->ndev->features &= ~NETIF_F_HW_CSUM;
1990
1991         ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats);
1992         if (!ndev_priv->stats)
1993                 return -ENOMEM;
1994
1995         ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free,
1996                                        ndev_priv->stats);
1997         if (ret)
1998                 dev_err(dev, "failed to add percpu stat free action %d\n", ret);
1999
2000         if (!common->dma_ndev)
2001                 common->dma_ndev = port->ndev;
2002
2003         return ret;
2004 }
2005
2006 static int am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common *common)
2007 {
2008         int ret;
2009         int i;
2010
2011         for (i = 0; i < common->port_num; i++) {
2012                 ret = am65_cpsw_nuss_init_port_ndev(common, i);
2013                 if (ret)
2014                         return ret;
2015         }
2016
2017         netif_napi_add(common->dma_ndev, &common->napi_rx,
2018                        am65_cpsw_nuss_rx_poll, NAPI_POLL_WEIGHT);
2019
2020         return ret;
2021 }
2022
2023 static int am65_cpsw_nuss_ndev_add_tx_napi(struct am65_cpsw_common *common)
2024 {
2025         struct device *dev = common->dev;
2026         int i, ret = 0;
2027
2028         for (i = 0; i < common->tx_ch_num; i++) {
2029                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
2030
2031                 netif_tx_napi_add(common->dma_ndev, &tx_chn->napi_tx,
2032                                   am65_cpsw_nuss_tx_poll, NAPI_POLL_WEIGHT);
2033
2034                 ret = devm_request_irq(dev, tx_chn->irq,
2035                                        am65_cpsw_nuss_tx_irq,
2036                                        IRQF_TRIGGER_HIGH,
2037                                        tx_chn->tx_chn_name, tx_chn);
2038                 if (ret) {
2039                         dev_err(dev, "failure requesting tx%u irq %u, %d\n",
2040                                 tx_chn->id, tx_chn->irq, ret);
2041                         goto err;
2042                 }
2043         }
2044
2045 err:
2046         return ret;
2047 }
2048
2049 static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common)
2050 {
2051         struct am65_cpsw_port *port;
2052         int i;
2053
2054         for (i = 0; i < common->port_num; i++) {
2055                 port = &common->ports[i];
2056                 if (port->ndev)
2057                         unregister_netdev(port->ndev);
2058         }
2059 }
2060
2061 static void am65_cpsw_port_offload_fwd_mark_update(struct am65_cpsw_common *common)
2062 {
2063         int set_val = 0;
2064         int i;
2065
2066         if (common->br_members == (GENMASK(common->port_num, 1) & ~common->disabled_ports_mask))
2067                 set_val = 1;
2068
2069         dev_dbg(common->dev, "set offload_fwd_mark %d\n", set_val);
2070
2071         for (i = 1; i <= common->port_num; i++) {
2072                 struct am65_cpsw_port *port = am65_common_get_port(common, i);
2073                 struct am65_cpsw_ndev_priv *priv;
2074
2075                 if (!port->ndev)
2076                         continue;
2077
2078                 priv = am65_ndev_to_priv(port->ndev);
2079                 priv->offload_fwd_mark = set_val;
2080         }
2081 }
2082
2083 bool am65_cpsw_port_dev_check(const struct net_device *ndev)
2084 {
2085         if (ndev->netdev_ops == &am65_cpsw_nuss_netdev_ops) {
2086                 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2087
2088                 return !common->is_emac_mode;
2089         }
2090
2091         return false;
2092 }
2093
2094 static int am65_cpsw_netdevice_port_link(struct net_device *ndev,
2095                                          struct net_device *br_ndev,
2096                                          struct netlink_ext_ack *extack)
2097 {
2098         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2099         struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2100         int err;
2101
2102         if (!common->br_members) {
2103                 common->hw_bridge_dev = br_ndev;
2104         } else {
2105                 /* This is adding the port to a second bridge, this is
2106                  * unsupported
2107                  */
2108                 if (common->hw_bridge_dev != br_ndev)
2109                         return -EOPNOTSUPP;
2110         }
2111
2112         err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
2113                                             false, extack);
2114         if (err)
2115                 return err;
2116
2117         common->br_members |= BIT(priv->port->port_id);
2118
2119         am65_cpsw_port_offload_fwd_mark_update(common);
2120
2121         return NOTIFY_DONE;
2122 }
2123
2124 static void am65_cpsw_netdevice_port_unlink(struct net_device *ndev)
2125 {
2126         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2127         struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2128
2129         switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL);
2130
2131         common->br_members &= ~BIT(priv->port->port_id);
2132
2133         am65_cpsw_port_offload_fwd_mark_update(common);
2134
2135         if (!common->br_members)
2136                 common->hw_bridge_dev = NULL;
2137 }
2138
2139 /* netdev notifier */
2140 static int am65_cpsw_netdevice_event(struct notifier_block *unused,
2141                                      unsigned long event, void *ptr)
2142 {
2143         struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
2144         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
2145         struct netdev_notifier_changeupper_info *info;
2146         int ret = NOTIFY_DONE;
2147
2148         if (!am65_cpsw_port_dev_check(ndev))
2149                 return NOTIFY_DONE;
2150
2151         switch (event) {
2152         case NETDEV_CHANGEUPPER:
2153                 info = ptr;
2154
2155                 if (netif_is_bridge_master(info->upper_dev)) {
2156                         if (info->linking)
2157                                 ret = am65_cpsw_netdevice_port_link(ndev,
2158                                                                     info->upper_dev,
2159                                                                     extack);
2160                         else
2161                                 am65_cpsw_netdevice_port_unlink(ndev);
2162                 }
2163                 break;
2164         default:
2165                 return NOTIFY_DONE;
2166         }
2167
2168         return notifier_from_errno(ret);
2169 }
2170
2171 static int am65_cpsw_register_notifiers(struct am65_cpsw_common *cpsw)
2172 {
2173         int ret = 0;
2174
2175         if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2176             !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2177                 return 0;
2178
2179         cpsw->am65_cpsw_netdevice_nb.notifier_call = &am65_cpsw_netdevice_event;
2180         ret = register_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2181         if (ret) {
2182                 dev_err(cpsw->dev, "can't register netdevice notifier\n");
2183                 return ret;
2184         }
2185
2186         ret = am65_cpsw_switchdev_register_notifiers(cpsw);
2187         if (ret)
2188                 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2189
2190         return ret;
2191 }
2192
2193 static void am65_cpsw_unregister_notifiers(struct am65_cpsw_common *cpsw)
2194 {
2195         if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2196             !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2197                 return;
2198
2199         am65_cpsw_switchdev_unregister_notifiers(cpsw);
2200         unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2201 }
2202
2203 static const struct devlink_ops am65_cpsw_devlink_ops = {};
2204
2205 static void am65_cpsw_init_stp_ale_entry(struct am65_cpsw_common *cpsw)
2206 {
2207         cpsw_ale_add_mcast(cpsw->ale, eth_stp_addr, ALE_PORT_HOST, ALE_SUPER, 0,
2208                            ALE_MCAST_BLOCK_LEARN_FWD);
2209 }
2210
2211 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common)
2212 {
2213         struct am65_cpsw_host *host = am65_common_get_host(common);
2214
2215         writel(common->default_vlan, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2216
2217         am65_cpsw_init_stp_ale_entry(common);
2218
2219         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
2220         dev_dbg(common->dev, "Set P0_UNI_FLOOD\n");
2221         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
2222 }
2223
2224 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common)
2225 {
2226         struct am65_cpsw_host *host = am65_common_get_host(common);
2227
2228         writel(0, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2229
2230         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
2231         dev_dbg(common->dev, "unset P0_UNI_FLOOD\n");
2232
2233         /* learning make no sense in multi-mac mode */
2234         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
2235 }
2236
2237 static int am65_cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
2238                                         struct devlink_param_gset_ctx *ctx)
2239 {
2240         struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2241         struct am65_cpsw_common *common = dl_priv->common;
2242
2243         dev_dbg(common->dev, "%s id:%u\n", __func__, id);
2244
2245         if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2246                 return -EOPNOTSUPP;
2247
2248         ctx->val.vbool = !common->is_emac_mode;
2249
2250         return 0;
2251 }
2252
2253 static void am65_cpsw_init_port_emac_ale(struct  am65_cpsw_port *port)
2254 {
2255         struct am65_cpsw_slave_data *slave = &port->slave;
2256         struct am65_cpsw_common *common = port->common;
2257         u32 port_mask;
2258
2259         writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2260
2261         if (slave->mac_only)
2262                 /* enable mac-only mode on port */
2263                 cpsw_ale_control_set(common->ale, port->port_id,
2264                                      ALE_PORT_MACONLY, 1);
2265
2266         cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_NOLEARN, 1);
2267
2268         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2269
2270         cpsw_ale_add_ucast(common->ale, port->ndev->dev_addr,
2271                            HOST_PORT_NUM, ALE_SECURE, slave->port_vlan);
2272         cpsw_ale_add_mcast(common->ale, port->ndev->broadcast,
2273                            port_mask, ALE_VLAN, slave->port_vlan, ALE_MCAST_FWD_2);
2274 }
2275
2276 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port)
2277 {
2278         struct am65_cpsw_slave_data *slave = &port->slave;
2279         struct am65_cpsw_common *cpsw = port->common;
2280         u32 port_mask;
2281
2282         cpsw_ale_control_set(cpsw->ale, port->port_id,
2283                              ALE_PORT_NOLEARN, 0);
2284
2285         cpsw_ale_add_ucast(cpsw->ale, port->ndev->dev_addr,
2286                            HOST_PORT_NUM, ALE_SECURE | ALE_BLOCKED | ALE_VLAN,
2287                            slave->port_vlan);
2288
2289         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2290
2291         cpsw_ale_add_mcast(cpsw->ale, port->ndev->broadcast,
2292                            port_mask, ALE_VLAN, slave->port_vlan,
2293                            ALE_MCAST_FWD_2);
2294
2295         writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2296
2297         cpsw_ale_control_set(cpsw->ale, port->port_id,
2298                              ALE_PORT_MACONLY, 0);
2299 }
2300
2301 static int am65_cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
2302                                         struct devlink_param_gset_ctx *ctx)
2303 {
2304         struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2305         struct am65_cpsw_common *cpsw = dl_priv->common;
2306         bool switch_en = ctx->val.vbool;
2307         bool if_running = false;
2308         int i;
2309
2310         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
2311
2312         if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2313                 return -EOPNOTSUPP;
2314
2315         if (switch_en == !cpsw->is_emac_mode)
2316                 return 0;
2317
2318         if (!switch_en && cpsw->br_members) {
2319                 dev_err(cpsw->dev, "Remove ports from bridge before disabling switch mode\n");
2320                 return -EINVAL;
2321         }
2322
2323         rtnl_lock();
2324
2325         cpsw->is_emac_mode = !switch_en;
2326
2327         for (i = 0; i < cpsw->port_num; i++) {
2328                 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2329
2330                 if (!sl_ndev || !netif_running(sl_ndev))
2331                         continue;
2332
2333                 if_running = true;
2334         }
2335
2336         if (!if_running) {
2337                 /* all ndevs are down */
2338                 for (i = 0; i < cpsw->port_num; i++) {
2339                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2340                         struct am65_cpsw_slave_data *slave;
2341
2342                         if (!sl_ndev)
2343                                 continue;
2344
2345                         slave = am65_ndev_to_slave(sl_ndev);
2346                         if (switch_en)
2347                                 slave->port_vlan = cpsw->default_vlan;
2348                         else
2349                                 slave->port_vlan = 0;
2350                 }
2351
2352                 goto exit;
2353         }
2354
2355         cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
2356         /* clean up ALE table */
2357         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_CLEAR, 1);
2358         cpsw_ale_control_get(cpsw->ale, HOST_PORT_NUM, ALE_AGEOUT);
2359
2360         if (switch_en) {
2361                 dev_info(cpsw->dev, "Enable switch mode\n");
2362
2363                 am65_cpsw_init_host_port_switch(cpsw);
2364
2365                 for (i = 0; i < cpsw->port_num; i++) {
2366                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2367                         struct am65_cpsw_slave_data *slave;
2368                         struct am65_cpsw_port *port;
2369
2370                         if (!sl_ndev)
2371                                 continue;
2372
2373                         port = am65_ndev_to_port(sl_ndev);
2374                         slave = am65_ndev_to_slave(sl_ndev);
2375                         slave->port_vlan = cpsw->default_vlan;
2376
2377                         if (netif_running(sl_ndev))
2378                                 am65_cpsw_init_port_switch_ale(port);
2379                 }
2380
2381         } else {
2382                 dev_info(cpsw->dev, "Disable switch mode\n");
2383
2384                 am65_cpsw_init_host_port_emac(cpsw);
2385
2386                 for (i = 0; i < cpsw->port_num; i++) {
2387                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2388                         struct am65_cpsw_port *port;
2389
2390                         if (!sl_ndev)
2391                                 continue;
2392
2393                         port = am65_ndev_to_port(sl_ndev);
2394                         port->slave.port_vlan = 0;
2395                         if (netif_running(sl_ndev))
2396                                 am65_cpsw_init_port_emac_ale(port);
2397                 }
2398         }
2399         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_BYPASS, 0);
2400 exit:
2401         rtnl_unlock();
2402
2403         return 0;
2404 }
2405
2406 static const struct devlink_param am65_cpsw_devlink_params[] = {
2407         DEVLINK_PARAM_DRIVER(AM65_CPSW_DL_PARAM_SWITCH_MODE, "switch_mode",
2408                              DEVLINK_PARAM_TYPE_BOOL,
2409                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
2410                              am65_cpsw_dl_switch_mode_get,
2411                              am65_cpsw_dl_switch_mode_set, NULL),
2412 };
2413
2414 static int am65_cpsw_nuss_register_devlink(struct am65_cpsw_common *common)
2415 {
2416         struct devlink_port_attrs attrs = {};
2417         struct am65_cpsw_devlink *dl_priv;
2418         struct device *dev = common->dev;
2419         struct devlink_port *dl_port;
2420         struct am65_cpsw_port *port;
2421         int ret = 0;
2422         int i;
2423
2424         common->devlink =
2425                 devlink_alloc(&am65_cpsw_devlink_ops, sizeof(*dl_priv), dev);
2426         if (!common->devlink)
2427                 return -ENOMEM;
2428
2429         dl_priv = devlink_priv(common->devlink);
2430         dl_priv->common = common;
2431
2432         /* Provide devlink hook to switch mode when multiple external ports
2433          * are present NUSS switchdev driver is enabled.
2434          */
2435         if (!AM65_CPSW_IS_CPSW2G(common) &&
2436             IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) {
2437                 ret = devlink_params_register(common->devlink,
2438                                               am65_cpsw_devlink_params,
2439                                               ARRAY_SIZE(am65_cpsw_devlink_params));
2440                 if (ret) {
2441                         dev_err(dev, "devlink params reg fail ret:%d\n", ret);
2442                         goto dl_unreg;
2443                 }
2444         }
2445
2446         for (i = 1; i <= common->port_num; i++) {
2447                 port = am65_common_get_port(common, i);
2448                 dl_port = &port->devlink_port;
2449
2450                 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
2451                 attrs.phys.port_number = port->port_id;
2452                 attrs.switch_id.id_len = sizeof(resource_size_t);
2453                 memcpy(attrs.switch_id.id, common->switch_id, attrs.switch_id.id_len);
2454                 devlink_port_attrs_set(dl_port, &attrs);
2455
2456                 ret = devlink_port_register(common->devlink, dl_port, port->port_id);
2457                 if (ret) {
2458                         dev_err(dev, "devlink_port reg fail for port %d, ret:%d\n",
2459                                 port->port_id, ret);
2460                         goto dl_port_unreg;
2461                 }
2462                 devlink_port_type_eth_set(dl_port, port->ndev);
2463         }
2464         devlink_register(common->devlink);
2465         return ret;
2466
2467 dl_port_unreg:
2468         for (i = i - 1; i >= 1; i--) {
2469                 port = am65_common_get_port(common, i);
2470                 dl_port = &port->devlink_port;
2471
2472                 devlink_port_unregister(dl_port);
2473         }
2474 dl_unreg:
2475         devlink_free(common->devlink);
2476         return ret;
2477 }
2478
2479 static void am65_cpsw_unregister_devlink(struct am65_cpsw_common *common)
2480 {
2481         struct devlink_port *dl_port;
2482         struct am65_cpsw_port *port;
2483         int i;
2484
2485         devlink_unregister(common->devlink);
2486
2487         for (i = 1; i <= common->port_num; i++) {
2488                 port = am65_common_get_port(common, i);
2489                 dl_port = &port->devlink_port;
2490
2491                 devlink_port_unregister(dl_port);
2492         }
2493
2494         if (!AM65_CPSW_IS_CPSW2G(common) &&
2495             IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2496                 devlink_params_unregister(common->devlink,
2497                                           am65_cpsw_devlink_params,
2498                                           ARRAY_SIZE(am65_cpsw_devlink_params));
2499
2500         devlink_free(common->devlink);
2501 }
2502
2503 static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common)
2504 {
2505         struct device *dev = common->dev;
2506         struct am65_cpsw_port *port;
2507         int ret = 0, i;
2508
2509         ret = am65_cpsw_nuss_ndev_add_tx_napi(common);
2510         if (ret)
2511                 return ret;
2512
2513         ret = devm_request_irq(dev, common->rx_chns.irq,
2514                                am65_cpsw_nuss_rx_irq,
2515                                IRQF_TRIGGER_HIGH, dev_name(dev), common);
2516         if (ret) {
2517                 dev_err(dev, "failure requesting rx irq %u, %d\n",
2518                         common->rx_chns.irq, ret);
2519                 return ret;
2520         }
2521
2522         for (i = 0; i < common->port_num; i++) {
2523                 port = &common->ports[i];
2524
2525                 if (!port->ndev)
2526                         continue;
2527
2528                 ret = register_netdev(port->ndev);
2529                 if (ret) {
2530                         dev_err(dev, "error registering slave net device%i %d\n",
2531                                 i, ret);
2532                         goto err_cleanup_ndev;
2533                 }
2534         }
2535
2536         ret = am65_cpsw_register_notifiers(common);
2537         if (ret)
2538                 goto err_cleanup_ndev;
2539
2540         ret = am65_cpsw_nuss_register_devlink(common);
2541         if (ret)
2542                 goto clean_unregister_notifiers;
2543
2544         /* can't auto unregister ndev using devm_add_action() due to
2545          * devres release sequence in DD core for DMA
2546          */
2547
2548         return 0;
2549 clean_unregister_notifiers:
2550         am65_cpsw_unregister_notifiers(common);
2551 err_cleanup_ndev:
2552         am65_cpsw_nuss_cleanup_ndev(common);
2553
2554         return ret;
2555 }
2556
2557 int am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common *common, int num_tx)
2558 {
2559         int ret;
2560
2561         common->tx_ch_num = num_tx;
2562         ret = am65_cpsw_nuss_init_tx_chns(common);
2563         if (ret)
2564                 return ret;
2565
2566         return am65_cpsw_nuss_ndev_add_tx_napi(common);
2567 }
2568
2569 struct am65_cpsw_soc_pdata {
2570         u32     quirks_dis;
2571 };
2572
2573 static const struct am65_cpsw_soc_pdata am65x_soc_sr2_0 = {
2574         .quirks_dis = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2575 };
2576
2577 static const struct soc_device_attribute am65_cpsw_socinfo[] = {
2578         { .family = "AM65X",
2579           .revision = "SR2.0",
2580           .data = &am65x_soc_sr2_0
2581         },
2582         {/* sentinel */}
2583 };
2584
2585 static const struct am65_cpsw_pdata am65x_sr1_0 = {
2586         .quirks = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2587         .ale_dev_id = "am65x-cpsw2g",
2588         .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2589 };
2590
2591 static const struct am65_cpsw_pdata j721e_pdata = {
2592         .quirks = 0,
2593         .ale_dev_id = "am65x-cpsw2g",
2594         .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2595 };
2596
2597 static const struct am65_cpsw_pdata am64x_cpswxg_pdata = {
2598         .quirks = 0,
2599         .ale_dev_id = "am64-cpswxg",
2600         .fdqring_mode = K3_RINGACC_RING_MODE_RING,
2601 };
2602
2603 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
2604         { .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0},
2605         { .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata},
2606         { .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata},
2607         { /* sentinel */ },
2608 };
2609 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);
2610
2611 static void am65_cpsw_nuss_apply_socinfo(struct am65_cpsw_common *common)
2612 {
2613         const struct soc_device_attribute *soc;
2614
2615         soc = soc_device_match(am65_cpsw_socinfo);
2616         if (soc && soc->data) {
2617                 const struct am65_cpsw_soc_pdata *socdata = soc->data;
2618
2619                 /* disable quirks */
2620                 common->pdata.quirks &= ~socdata->quirks_dis;
2621         }
2622 }
2623
2624 static int am65_cpsw_nuss_probe(struct platform_device *pdev)
2625 {
2626         struct cpsw_ale_params ale_params = { 0 };
2627         const struct of_device_id *of_id;
2628         struct device *dev = &pdev->dev;
2629         struct am65_cpsw_common *common;
2630         struct device_node *node;
2631         struct resource *res;
2632         struct clk *clk;
2633         u64 id_temp;
2634         int ret, i;
2635
2636         common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
2637         if (!common)
2638                 return -ENOMEM;
2639         common->dev = dev;
2640
2641         of_id = of_match_device(am65_cpsw_nuss_of_mtable, dev);
2642         if (!of_id)
2643                 return -EINVAL;
2644         common->pdata = *(const struct am65_cpsw_pdata *)of_id->data;
2645
2646         am65_cpsw_nuss_apply_socinfo(common);
2647
2648         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cpsw_nuss");
2649         common->ss_base = devm_ioremap_resource(&pdev->dev, res);
2650         if (IS_ERR(common->ss_base))
2651                 return PTR_ERR(common->ss_base);
2652         common->cpsw_base = common->ss_base + AM65_CPSW_CPSW_NU_BASE;
2653         /* Use device's physical base address as switch id */
2654         id_temp = cpu_to_be64(res->start);
2655         memcpy(common->switch_id, &id_temp, sizeof(res->start));
2656
2657         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
2658         if (!node)
2659                 return -ENOENT;
2660         common->port_num = of_get_child_count(node);
2661         if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS)
2662                 return -ENOENT;
2663         of_node_put(node);
2664
2665         common->rx_flow_id_base = -1;
2666         init_completion(&common->tdown_complete);
2667         common->tx_ch_num = 1;
2668         common->pf_p0_rx_ptype_rrobin = false;
2669         common->default_vlan = 1;
2670
2671         common->ports = devm_kcalloc(dev, common->port_num,
2672                                      sizeof(*common->ports),
2673                                      GFP_KERNEL);
2674         if (!common->ports)
2675                 return -ENOMEM;
2676
2677         clk = devm_clk_get(dev, "fck");
2678         if (IS_ERR(clk))
2679                 return dev_err_probe(dev, PTR_ERR(clk), "getting fck clock\n");
2680         common->bus_freq = clk_get_rate(clk);
2681
2682         pm_runtime_enable(dev);
2683         ret = pm_runtime_get_sync(dev);
2684         if (ret < 0) {
2685                 pm_runtime_put_noidle(dev);
2686                 pm_runtime_disable(dev);
2687                 return ret;
2688         }
2689
2690         node = of_get_child_by_name(dev->of_node, "mdio");
2691         if (!node) {
2692                 dev_warn(dev, "MDIO node not found\n");
2693         } else if (of_device_is_available(node)) {
2694                 struct platform_device *mdio_pdev;
2695
2696                 mdio_pdev = of_platform_device_create(node, NULL, dev);
2697                 if (!mdio_pdev) {
2698                         ret = -ENODEV;
2699                         goto err_pm_clear;
2700                 }
2701
2702                 common->mdio_dev =  &mdio_pdev->dev;
2703         }
2704         of_node_put(node);
2705
2706         am65_cpsw_nuss_get_ver(common);
2707
2708         /* init tx channels */
2709         ret = am65_cpsw_nuss_init_tx_chns(common);
2710         if (ret)
2711                 goto err_of_clear;
2712         ret = am65_cpsw_nuss_init_rx_chns(common);
2713         if (ret)
2714                 goto err_of_clear;
2715
2716         ret = am65_cpsw_nuss_init_host_p(common);
2717         if (ret)
2718                 goto err_of_clear;
2719
2720         ret = am65_cpsw_nuss_init_slave_ports(common);
2721         if (ret)
2722                 goto err_of_clear;
2723
2724         /* init common data */
2725         ale_params.dev = dev;
2726         ale_params.ale_ageout = AM65_CPSW_ALE_AGEOUT_DEFAULT;
2727         ale_params.ale_ports = common->port_num + 1;
2728         ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE;
2729         ale_params.dev_id = common->pdata.ale_dev_id;
2730         ale_params.bus_freq = common->bus_freq;
2731
2732         common->ale = cpsw_ale_create(&ale_params);
2733         if (IS_ERR(common->ale)) {
2734                 dev_err(dev, "error initializing ale engine\n");
2735                 ret = PTR_ERR(common->ale);
2736                 goto err_of_clear;
2737         }
2738
2739         ret = am65_cpsw_init_cpts(common);
2740         if (ret)
2741                 goto err_of_clear;
2742
2743         /* init ports */
2744         for (i = 0; i < common->port_num; i++)
2745                 am65_cpsw_nuss_slave_disable_unused(&common->ports[i]);
2746
2747         dev_set_drvdata(dev, common);
2748
2749         common->is_emac_mode = true;
2750
2751         ret = am65_cpsw_nuss_init_ndevs(common);
2752         if (ret)
2753                 goto err_of_clear;
2754
2755         ret = am65_cpsw_nuss_register_ndevs(common);
2756         if (ret)
2757                 goto err_of_clear;
2758
2759         pm_runtime_put(dev);
2760         return 0;
2761
2762 err_of_clear:
2763         of_platform_device_destroy(common->mdio_dev, NULL);
2764 err_pm_clear:
2765         pm_runtime_put_sync(dev);
2766         pm_runtime_disable(dev);
2767         return ret;
2768 }
2769
2770 static int am65_cpsw_nuss_remove(struct platform_device *pdev)
2771 {
2772         struct device *dev = &pdev->dev;
2773         struct am65_cpsw_common *common;
2774         int ret;
2775
2776         common = dev_get_drvdata(dev);
2777
2778         ret = pm_runtime_get_sync(&pdev->dev);
2779         if (ret < 0) {
2780                 pm_runtime_put_noidle(&pdev->dev);
2781                 return ret;
2782         }
2783
2784         am65_cpsw_unregister_devlink(common);
2785         am65_cpsw_unregister_notifiers(common);
2786
2787         /* must unregister ndevs here because DD release_driver routine calls
2788          * dma_deconfigure(dev) before devres_release_all(dev)
2789          */
2790         am65_cpsw_nuss_cleanup_ndev(common);
2791
2792         of_platform_device_destroy(common->mdio_dev, NULL);
2793
2794         pm_runtime_put_sync(&pdev->dev);
2795         pm_runtime_disable(&pdev->dev);
2796         return 0;
2797 }
2798
2799 static struct platform_driver am65_cpsw_nuss_driver = {
2800         .driver = {
2801                 .name    = AM65_CPSW_DRV_NAME,
2802                 .of_match_table = am65_cpsw_nuss_of_mtable,
2803         },
2804         .probe = am65_cpsw_nuss_probe,
2805         .remove = am65_cpsw_nuss_remove,
2806 };
2807
2808 module_platform_driver(am65_cpsw_nuss_driver);
2809
2810 MODULE_LICENSE("GPL v2");
2811 MODULE_AUTHOR("Grygorii Strashko <[email protected]>");
2812 MODULE_DESCRIPTION("TI AM65 CPSW Ethernet driver");