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/etherdevice.h>
   9 #include <linux/if_vlan.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/kernel.h>
  12 #include <linux/kmemleak.h>
  13 #include <linux/module.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/net_tstamp.h>
  16 #include <linux/of.h>
  17 #include <linux/of_mdio.h>
  18 #include <linux/of_net.h>
  19 #include <linux/of_device.h>
  20 #include <linux/phy.h>
  21 #include <linux/phy/phy.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/regmap.h>
  25 #include <linux/mfd/syscon.h>
  26 #include <linux/dma/ti-cppi5.h>
  27 #include <linux/dma/k3-udma-glue.h>
  28
  29 #include "cpsw_ale.h"
  30 #include "cpsw_sl.h"
  31 #include "am65-cpsw-nuss.h"
  32 #include "k3-cppi-desc-pool.h"
  33
  34 #define AM65_CPSW_SS_BASE       0x0
  35 #define AM65_CPSW_SGMII_BASE    0x100
  36 #define AM65_CPSW_XGMII_BASE    0x2100
  37 #define AM65_CPSW_CPSW_NU_BASE  0x20000
  38 #define AM65_CPSW_NU_PORTS_BASE 0x1000
  39 #define AM65_CPSW_NU_STATS_BASE 0x1a000
  40 #define AM65_CPSW_NU_ALE_BASE   0x1e000
  41 #define AM65_CPSW_NU_CPTS_BASE  0x1d000
  42
  43 #define AM65_CPSW_NU_PORTS_OFFSET       0x1000
  44 #define AM65_CPSW_NU_STATS_PORT_OFFSET  0x200
  45
  46 #define AM65_CPSW_MAX_PORTS     8
  47
  48 #define AM65_CPSW_MIN_PACKET_SIZE       VLAN_ETH_ZLEN
  49 #define AM65_CPSW_MAX_PACKET_SIZE       (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
  50
  51 #define AM65_CPSW_REG_CTL               0x004
  52 #define AM65_CPSW_REG_STAT_PORT_EN      0x014
  53 #define AM65_CPSW_REG_PTYPE             0x018
  54
  55 #define AM65_CPSW_P0_REG_CTL                    0x004
  56 #define AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET      0x008
  57
  58 #define AM65_CPSW_PORT_REG_PRI_CTL              0x01c
  59 #define AM65_CPSW_PORT_REG_RX_PRI_MAP           0x020
  60 #define AM65_CPSW_PORT_REG_RX_MAXLEN            0x024
  61
  62 #define AM65_CPSW_PORTN_REG_SA_L                0x308
  63 #define AM65_CPSW_PORTN_REG_SA_H                0x30c
  64 #define AM65_CPSW_PORTN_REG_TS_CTL              0x310
  65 #define AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG    0x314
  66 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG   0x318
  67 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2       0x31C
  68
  69 #define AM65_CPSW_CTL_VLAN_AWARE                BIT(1)
  70 #define AM65_CPSW_CTL_P0_ENABLE                 BIT(2)
  71 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE          BIT(13)
  72 #define AM65_CPSW_CTL_P0_RX_PAD                 BIT(14)
  73
  74 /* AM65_CPSW_P0_REG_CTL */
  75 #define AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN     BIT(0)
  76
  77 /* AM65_CPSW_PORT_REG_PRI_CTL */
  78 #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN      BIT(8)
  79
  80 /* AM65_CPSW_PN_TS_CTL register fields */
  81 #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN         BIT(4)
  82 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN      BIT(5)
  83 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT2_EN      BIT(6)
  84 #define AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN         BIT(7)
  85 #define AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN         BIT(10)
  86 #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN       BIT(11)
  87 #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT   16
  88
  89 /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */
  90 #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT     16
  91
  92 /* AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 */
  93 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107       BIT(16)
  94 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129       BIT(17)
  95 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130       BIT(18)
  96 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131       BIT(19)
  97 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132       BIT(20)
  98 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319       BIT(21)
  99 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320       BIT(22)
 100 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO BIT(23)
 101
 102 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
 103 #define AM65_CPSW_TS_EVENT_MSG_TYPE_BITS (BIT(0) | BIT(1) | BIT(2) | BIT(3))
 104
 105 #define AM65_CPSW_TS_SEQ_ID_OFFSET (0x1e)
 106
 107 #define AM65_CPSW_TS_TX_ANX_ALL_EN              \
 108         (AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN |      \
 109          AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN |      \
 110          AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN)
 111
 112 #define AM65_CPSW_ALE_AGEOUT_DEFAULT    30
 113 /* Number of TX/RX descriptors */
 114 #define AM65_CPSW_MAX_TX_DESC   500
 115 #define AM65_CPSW_MAX_RX_DESC   500
 116
 117 #define AM65_CPSW_NAV_PS_DATA_SIZE 16
 118 #define AM65_CPSW_NAV_SW_DATA_SIZE 16
 119
 120 #define AM65_CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK | \
 121                          NETIF_MSG_IFUP | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | \
 122                          NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
 123
 124 static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave,
 125                                       const u8 *dev_addr)
 126 {
 127         u32 mac_hi = (dev_addr[0] << 0) | (dev_addr[1] << 8) |
 128                      (dev_addr[2] << 16) | (dev_addr[3] << 24);
 129         u32 mac_lo = (dev_addr[4] << 0) | (dev_addr[5] << 8);
 130
 131         writel(mac_hi, slave->port_base + AM65_CPSW_PORTN_REG_SA_H);
 132         writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L);
 133 }
 134
 135 static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port)
 136 {
 137         cpsw_sl_reset(port->slave.mac_sl, 100);
 138         /* Max length register has to be restored after MAC SL reset */
 139         writel(AM65_CPSW_MAX_PACKET_SIZE,
 140                port->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 141 }
 142
 143 static void am65_cpsw_nuss_get_ver(struct am65_cpsw_common *common)
 144 {
 145         common->nuss_ver = readl(common->ss_base);
 146         common->cpsw_ver = readl(common->cpsw_base);
 147         dev_info(common->dev,
 148                  "initializing am65 cpsw nuss version 0x%08X, cpsw version 0x%08X Ports: %u\n",
 149                 common->nuss_ver,
 150                 common->cpsw_ver,
 151                 common->port_num + 1);
 152 }
 153
 154 void am65_cpsw_nuss_adjust_link(struct net_device *ndev)
 155 {
 156         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 157         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 158         struct phy_device *phy = port->slave.phy;
 159         u32 mac_control = 0;
 160
 161         if (!phy)
 162                 return;
 163
 164         if (phy->link) {
 165                 mac_control = CPSW_SL_CTL_GMII_EN;
 166
 167                 if (phy->speed == 1000)
 168                         mac_control |= CPSW_SL_CTL_GIG;
 169                 if (phy->speed == 10 && phy_interface_is_rgmii(phy))
 170                         /* Can be used with in band mode only */
 171                         mac_control |= CPSW_SL_CTL_EXT_EN;
 172                 if (phy->duplex)
 173                         mac_control |= CPSW_SL_CTL_FULLDUPLEX;
 174
 175                 /* RGMII speed is 100M if !CPSW_SL_CTL_GIG*/
 176
 177                 /* rx_pause/tx_pause */
 178                 if (port->slave.rx_pause)
 179                         mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
 180
 181                 if (port->slave.tx_pause)
 182                         mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
 183
 184                 cpsw_sl_ctl_set(port->slave.mac_sl, mac_control);
 185
 186                 /* enable forwarding */
 187                 cpsw_ale_control_set(common->ale, port->port_id,
 188                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 189
 190                 netif_tx_wake_all_queues(ndev);
 191         } else {
 192                 int tmo;
 193                 /* disable forwarding */
 194                 cpsw_ale_control_set(common->ale, port->port_id,
 195                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 196
 197                 cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
 198
 199                 tmo = cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
 200                 dev_dbg(common->dev, "donw msc_sl %08x tmo %d\n",
 201                         cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_MACSTATUS),
 202                         tmo);
 203
 204                 cpsw_sl_ctl_reset(port->slave.mac_sl);
 205
 206                 netif_tx_stop_all_queues(ndev);
 207         }
 208
 209         phy_print_status(phy);
 210 }
 211
 212 static int am65_cpsw_nuss_ndo_slave_add_vid(struct net_device *ndev,
 213                                             __be16 proto, u16 vid)
 214 {
 215         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 216         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 217         u32 port_mask, unreg_mcast = 0;
 218         int ret;
 219
 220         ret = pm_runtime_get_sync(common->dev);
 221         if (ret < 0) {
 222                 pm_runtime_put_noidle(common->dev);
 223                 return ret;
 224         }
 225
 226         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
 227         if (!vid)
 228                 unreg_mcast = port_mask;
 229         dev_info(common->dev, "Adding vlan %d to vlan filter\n", vid);
 230         ret = cpsw_ale_add_vlan(common->ale, vid, port_mask,
 231                                 unreg_mcast, port_mask, 0);
 232
 233         pm_runtime_put(common->dev);
 234         return ret;
 235 }
 236
 237 static int am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device *ndev,
 238                                              __be16 proto, u16 vid)
 239 {
 240         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 241         int ret;
 242
 243         ret = pm_runtime_get_sync(common->dev);
 244         if (ret < 0) {
 245                 pm_runtime_put_noidle(common->dev);
 246                 return ret;
 247         }
 248
 249         dev_info(common->dev, "Removing vlan %d from vlan filter\n", vid);
 250         ret = cpsw_ale_del_vlan(common->ale, vid, 0);
 251
 252         pm_runtime_put(common->dev);
 253         return ret;
 254 }
 255
 256 static void am65_cpsw_slave_set_promisc_2g(struct am65_cpsw_port *port,
 257                                            bool promisc)
 258 {
 259         struct am65_cpsw_common *common = port->common;
 260
 261         if (promisc) {
 262                 /* Enable promiscuous mode */
 263                 cpsw_ale_control_set(common->ale, port->port_id,
 264                                      ALE_PORT_MACONLY_CAF, 1);
 265                 dev_dbg(common->dev, "promisc enabled\n");
 266         } else {
 267                 /* Disable promiscuous mode */
 268                 cpsw_ale_control_set(common->ale, port->port_id,
 269                                      ALE_PORT_MACONLY_CAF, 0);
 270                 dev_dbg(common->dev, "promisc disabled\n");
 271         }
 272 }
 273
 274 static void am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device *ndev)
 275 {
 276         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 277         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 278         u32 port_mask;
 279         bool promisc;
 280
 281         promisc = !!(ndev->flags & IFF_PROMISC);
 282         am65_cpsw_slave_set_promisc_2g(port, promisc);
 283
 284         if (promisc)
 285                 return;
 286
 287         /* Restore allmulti on vlans if necessary */
 288         cpsw_ale_set_allmulti(common->ale,
 289                               ndev->flags & IFF_ALLMULTI, port->port_id);
 290
 291         port_mask = ALE_PORT_HOST;
 292         /* Clear all mcast from ALE */
 293         cpsw_ale_flush_multicast(common->ale, port_mask, -1);
 294
 295         if (!netdev_mc_empty(ndev)) {
 296                 struct netdev_hw_addr *ha;
 297
 298                 /* program multicast address list into ALE register */
 299                 netdev_for_each_mc_addr(ha, ndev) {
 300                         cpsw_ale_add_mcast(common->ale, ha->addr,
 301                                            port_mask, 0, 0, 0);
 302                 }
 303         }
 304 }
 305
 306 static void am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device *ndev,
 307                                                unsigned int txqueue)
 308 {
 309         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 310         struct am65_cpsw_tx_chn *tx_chn;
 311         struct netdev_queue *netif_txq;
 312         unsigned long trans_start;
 313
 314         netif_txq = netdev_get_tx_queue(ndev, txqueue);
 315         tx_chn = &common->tx_chns[txqueue];
 316         trans_start = netif_txq->trans_start;
 317
 318         netdev_err(ndev, "txq:%d DRV_XOFF:%d tmo:%u dql_avail:%d free_desc:%zu\n",
 319                    txqueue,
 320                    netif_tx_queue_stopped(netif_txq),
 321                    jiffies_to_msecs(jiffies - trans_start),
 322                    dql_avail(&netif_txq->dql),
 323                    k3_cppi_desc_pool_avail(tx_chn->desc_pool));
 324
 325         if (netif_tx_queue_stopped(netif_txq)) {
 326                 /* try recover if stopped by us */
 327                 txq_trans_update(netif_txq);
 328                 netif_tx_wake_queue(netif_txq);
 329         }
 330 }
 331
 332 static int am65_cpsw_nuss_rx_push(struct am65_cpsw_common *common,
 333                                   struct sk_buff *skb)
 334 {
 335         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 336         struct cppi5_host_desc_t *desc_rx;
 337         struct device *dev = common->dev;
 338         u32 pkt_len = skb_tailroom(skb);
 339         dma_addr_t desc_dma;
 340         dma_addr_t buf_dma;
 341         void *swdata;
 342
 343         desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
 344         if (!desc_rx) {
 345                 dev_err(dev, "Failed to allocate RXFDQ descriptor\n");
 346                 return -ENOMEM;
 347         }
 348         desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
 349
 350         buf_dma = dma_map_single(dev, skb->data, pkt_len, DMA_FROM_DEVICE);
 351         if (unlikely(dma_mapping_error(dev, buf_dma))) {
 352                 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 353                 dev_err(dev, "Failed to map rx skb buffer\n");
 354                 return -EINVAL;
 355         }
 356
 357         cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
 358                          AM65_CPSW_NAV_PS_DATA_SIZE);
 359         cppi5_hdesc_attach_buf(desc_rx, 0, 0, buf_dma, skb_tailroom(skb));
 360         swdata = cppi5_hdesc_get_swdata(desc_rx);
 361         *((void **)swdata) = skb;
 362
 363         return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma);
 364 }
 365
 366 void am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common *common)
 367 {
 368         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 369         u32 val, pri_map;
 370
 371         /* P0 set Receive Priority Type */
 372         val = readl(host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 373
 374         if (common->pf_p0_rx_ptype_rrobin) {
 375                 val |= AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 376                 /* Enet Ports fifos works in fixed priority mode only, so
 377                  * reset P0_Rx_Pri_Map so all packet will go in Enet fifo 0
 378                  */
 379                 pri_map = 0x0;
 380         } else {
 381                 val &= ~AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 382                 /* restore P0_Rx_Pri_Map */
 383                 pri_map = 0x76543210;
 384         }
 385
 386         writel(pri_map, host_p->port_base + AM65_CPSW_PORT_REG_RX_PRI_MAP);
 387         writel(val, host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 388 }
 389
 390 static int am65_cpsw_nuss_common_open(struct am65_cpsw_common *common,
 391                                       netdev_features_t features)
 392 {
 393         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 394         int port_idx, i, ret;
 395         struct sk_buff *skb;
 396         u32 val, port_mask;
 397
 398         if (common->usage_count)
 399                 return 0;
 400
 401         /* Control register */
 402         writel(AM65_CPSW_CTL_P0_ENABLE | AM65_CPSW_CTL_P0_TX_CRC_REMOVE |
 403                AM65_CPSW_CTL_VLAN_AWARE | AM65_CPSW_CTL_P0_RX_PAD,
 404                common->cpsw_base + AM65_CPSW_REG_CTL);
 405         /* Max length register */
 406         writel(AM65_CPSW_MAX_PACKET_SIZE,
 407                host_p->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 408         /* set base flow_id */
 409         writel(common->rx_flow_id_base,
 410                host_p->port_base + AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET);
 411         /* en tx crc offload */
 412         if (features & NETIF_F_HW_CSUM)
 413                 writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN,
 414                        host_p->port_base + AM65_CPSW_P0_REG_CTL);
 415
 416         am65_cpsw_nuss_set_p0_ptype(common);
 417
 418         /* enable statistic */
 419         val = BIT(HOST_PORT_NUM);
 420         for (port_idx = 0; port_idx < common->port_num; port_idx++) {
 421                 struct am65_cpsw_port *port = &common->ports[port_idx];
 422
 423                 if (!port->disabled)
 424                         val |=  BIT(port->port_id);
 425         }
 426         writel(val, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 427
 428         /* disable priority elevation */
 429         writel(0, common->cpsw_base + AM65_CPSW_REG_PTYPE);
 430
 431         cpsw_ale_start(common->ale);
 432
 433         /* limit to one RX flow only */
 434         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 435                              ALE_DEFAULT_THREAD_ID, 0);
 436         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 437                              ALE_DEFAULT_THREAD_ENABLE, 1);
 438         if (AM65_CPSW_IS_CPSW2G(common))
 439                 cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 440                                      ALE_PORT_NOLEARN, 1);
 441         /* switch to vlan unaware mode */
 442         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 1);
 443         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 444                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 445
 446         /* default vlan cfg: create mask based on enabled ports */
 447         port_mask = GENMASK(common->port_num, 0) &
 448                     ~common->disabled_ports_mask;
 449
 450         cpsw_ale_add_vlan(common->ale, 0, port_mask,
 451                           port_mask, port_mask,
 452                           port_mask & ~ALE_PORT_HOST);
 453
 454         for (i = 0; i < common->rx_chns.descs_num; i++) {
 455                 skb = __netdev_alloc_skb_ip_align(NULL,
 456                                                   AM65_CPSW_MAX_PACKET_SIZE,
 457                                                   GFP_KERNEL);
 458                 if (!skb) {
 459                         dev_err(common->dev, "cannot allocate skb\n");
 460                         return -ENOMEM;
 461                 }
 462
 463                 ret = am65_cpsw_nuss_rx_push(common, skb);
 464                 if (ret < 0) {
 465                         dev_err(common->dev,
 466                                 "cannot submit skb to channel rx, error %d\n",
 467                                 ret);
 468                         kfree_skb(skb);
 469                         return ret;
 470                 }
 471                 kmemleak_not_leak(skb);
 472         }
 473         k3_udma_glue_enable_rx_chn(common->rx_chns.rx_chn);
 474
 475         for (i = 0; i < common->tx_ch_num; i++) {
 476                 ret = k3_udma_glue_enable_tx_chn(common->tx_chns[i].tx_chn);
 477                 if (ret)
 478                         return ret;
 479                 napi_enable(&common->tx_chns[i].napi_tx);
 480         }
 481
 482         napi_enable(&common->napi_rx);
 483
 484         dev_dbg(common->dev, "cpsw_nuss started\n");
 485         return 0;
 486 }
 487
 488 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma);
 489 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma);
 490
 491 static int am65_cpsw_nuss_common_stop(struct am65_cpsw_common *common)
 492 {
 493         int i;
 494
 495         if (common->usage_count != 1)
 496                 return 0;
 497
 498         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 499                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 500
 501         /* shutdown tx channels */
 502         atomic_set(&common->tdown_cnt, common->tx_ch_num);
 503         /* ensure new tdown_cnt value is visible */
 504         smp_mb__after_atomic();
 505         reinit_completion(&common->tdown_complete);
 506
 507         for (i = 0; i < common->tx_ch_num; i++)
 508                 k3_udma_glue_tdown_tx_chn(common->tx_chns[i].tx_chn, false);
 509
 510         i = wait_for_completion_timeout(&common->tdown_complete,
 511                                         msecs_to_jiffies(1000));
 512         if (!i)
 513                 dev_err(common->dev, "tx timeout\n");
 514         for (i = 0; i < common->tx_ch_num; i++)
 515                 napi_disable(&common->tx_chns[i].napi_tx);
 516
 517         for (i = 0; i < common->tx_ch_num; i++) {
 518                 k3_udma_glue_reset_tx_chn(common->tx_chns[i].tx_chn,
 519                                           &common->tx_chns[i],
 520                                           am65_cpsw_nuss_tx_cleanup);
 521                 k3_udma_glue_disable_tx_chn(common->tx_chns[i].tx_chn);
 522         }
 523
 524         k3_udma_glue_tdown_rx_chn(common->rx_chns.rx_chn, true);
 525         napi_disable(&common->napi_rx);
 526
 527         for (i = 0; i < AM65_CPSW_MAX_RX_FLOWS; i++)
 528                 k3_udma_glue_reset_rx_chn(common->rx_chns.rx_chn, i,
 529                                           &common->rx_chns,
 530                                           am65_cpsw_nuss_rx_cleanup, !!i);
 531
 532         k3_udma_glue_disable_rx_chn(common->rx_chns.rx_chn);
 533
 534         cpsw_ale_stop(common->ale);
 535
 536         writel(0, common->cpsw_base + AM65_CPSW_REG_CTL);
 537         writel(0, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 538
 539         dev_dbg(common->dev, "cpsw_nuss stopped\n");
 540         return 0;
 541 }
 542
 543 static int am65_cpsw_nuss_ndo_slave_stop(struct net_device *ndev)
 544 {
 545         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 546         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 547         int ret;
 548
 549         if (port->slave.phy)
 550                 phy_stop(port->slave.phy);
 551
 552         netif_tx_stop_all_queues(ndev);
 553
 554         if (port->slave.phy) {
 555                 phy_disconnect(port->slave.phy);
 556                 port->slave.phy = NULL;
 557         }
 558
 559         ret = am65_cpsw_nuss_common_stop(common);
 560         if (ret)
 561                 return ret;
 562
 563         common->usage_count--;
 564         pm_runtime_put(common->dev);
 565         return 0;
 566 }
 567
 568 static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
 569 {
 570         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 571         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 572         u32 port_mask;
 573         int ret, i;
 574
 575         ret = pm_runtime_get_sync(common->dev);
 576         if (ret < 0) {
 577                 pm_runtime_put_noidle(common->dev);
 578                 return ret;
 579         }
 580
 581         /* Notify the stack of the actual queue counts. */
 582         ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num);
 583         if (ret) {
 584                 dev_err(common->dev, "cannot set real number of tx queues\n");
 585                 return ret;
 586         }
 587
 588         ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES);
 589         if (ret) {
 590                 dev_err(common->dev, "cannot set real number of rx queues\n");
 591                 return ret;
 592         }
 593
 594         for (i = 0; i < common->tx_ch_num; i++)
 595                 netdev_tx_reset_queue(netdev_get_tx_queue(ndev, i));
 596
 597         ret = am65_cpsw_nuss_common_open(common, ndev->features);
 598         if (ret)
 599                 return ret;
 600
 601         common->usage_count++;
 602
 603         am65_cpsw_port_set_sl_mac(port, ndev->dev_addr);
 604
 605         if (port->slave.mac_only)
 606                 /* enable mac-only mode on port */
 607                 cpsw_ale_control_set(common->ale, port->port_id,
 608                                      ALE_PORT_MACONLY, 1);
 609         if (AM65_CPSW_IS_CPSW2G(common))
 610                 cpsw_ale_control_set(common->ale, port->port_id,
 611                                      ALE_PORT_NOLEARN, 1);
 612
 613         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
 614         cpsw_ale_add_ucast(common->ale, ndev->dev_addr,
 615                            HOST_PORT_NUM, ALE_SECURE, 0);
 616         cpsw_ale_add_mcast(common->ale, ndev->broadcast,
 617                            port_mask, 0, 0, ALE_MCAST_FWD_2);
 618
 619         /* mac_sl should be configured via phy-link interface */
 620         am65_cpsw_sl_ctl_reset(port);
 621
 622         ret = phy_set_mode_ext(port->slave.ifphy, PHY_MODE_ETHERNET,
 623                                port->slave.phy_if);
 624         if (ret)
 625                 goto error_cleanup;
 626
 627         if (port->slave.phy_node) {
 628                 port->slave.phy = of_phy_connect(ndev,
 629                                                  port->slave.phy_node,
 630                                                  &am65_cpsw_nuss_adjust_link,
 631                                                  0, port->slave.phy_if);
 632                 if (!port->slave.phy) {
 633                         dev_err(common->dev, "phy %pOF not found on slave %d\n",
 634                                 port->slave.phy_node,
 635                                 port->port_id);
 636                         ret = -ENODEV;
 637                         goto error_cleanup;
 638                 }
 639         }
 640
 641         phy_attached_info(port->slave.phy);
 642         phy_start(port->slave.phy);
 643
 644         return 0;
 645
 646 error_cleanup:
 647         am65_cpsw_nuss_ndo_slave_stop(ndev);
 648         return ret;
 649 }
 650
 651 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)
 652 {
 653         struct am65_cpsw_rx_chn *rx_chn = data;
 654         struct cppi5_host_desc_t *desc_rx;
 655         struct sk_buff *skb;
 656         dma_addr_t buf_dma;
 657         u32 buf_dma_len;
 658         void **swdata;
 659
 660         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 661         swdata = cppi5_hdesc_get_swdata(desc_rx);
 662         skb = *swdata;
 663         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 664
 665         dma_unmap_single(rx_chn->dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 666         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 667
 668         dev_kfree_skb_any(skb);
 669 }
 670
 671 /* RX psdata[2] word format - checksum information */
 672 #define AM65_CPSW_RX_PSD_CSUM_ADD       GENMASK(15, 0)
 673 #define AM65_CPSW_RX_PSD_CSUM_ERR       BIT(16)
 674 #define AM65_CPSW_RX_PSD_IS_FRAGMENT    BIT(17)
 675 #define AM65_CPSW_RX_PSD_IS_TCP         BIT(18)
 676 #define AM65_CPSW_RX_PSD_IPV6_VALID     BIT(19)
 677 #define AM65_CPSW_RX_PSD_IPV4_VALID     BIT(20)
 678
 679 static void am65_cpsw_nuss_rx_csum(struct sk_buff *skb, u32 csum_info)
 680 {
 681         /* HW can verify IPv4/IPv6 TCP/UDP packets checksum
 682          * csum information provides in psdata[2] word:
 683          * AM65_CPSW_RX_PSD_CSUM_ERR bit - indicates csum error
 684          * AM65_CPSW_RX_PSD_IPV6_VALID and AM65_CPSW_RX_PSD_IPV4_VALID
 685          * bits - indicates IPv4/IPv6 packet
 686          * AM65_CPSW_RX_PSD_IS_FRAGMENT bit - indicates fragmented packet
 687          * AM65_CPSW_RX_PSD_CSUM_ADD has value 0xFFFF for non fragmented packets
 688          * or csum value for fragmented packets if !AM65_CPSW_RX_PSD_CSUM_ERR
 689          */
 690         skb_checksum_none_assert(skb);
 691
 692         if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM)))
 693                 return;
 694
 695         if ((csum_info & (AM65_CPSW_RX_PSD_IPV6_VALID |
 696                           AM65_CPSW_RX_PSD_IPV4_VALID)) &&
 697                           !(csum_info & AM65_CPSW_RX_PSD_CSUM_ERR)) {
 698                 /* csum for fragmented packets is unsupported */
 699                 if (!(csum_info & AM65_CPSW_RX_PSD_IS_FRAGMENT))
 700                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 701         }
 702 }
 703
 704 static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common,
 705                                      u32 flow_idx)
 706 {
 707         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 708         u32 buf_dma_len, pkt_len, port_id = 0, csum_info;
 709         struct am65_cpsw_ndev_priv *ndev_priv;
 710         struct am65_cpsw_ndev_stats *stats;
 711         struct cppi5_host_desc_t *desc_rx;
 712         struct device *dev = common->dev;
 713         struct sk_buff *skb, *new_skb;
 714         dma_addr_t desc_dma, buf_dma;
 715         struct am65_cpsw_port *port;
 716         struct net_device *ndev;
 717         void **swdata;
 718         u32 *psdata;
 719         int ret = 0;
 720
 721         ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_idx, &desc_dma);
 722         if (ret) {
 723                 if (ret != -ENODATA)
 724                         dev_err(dev, "RX: pop chn fail %d\n", ret);
 725                 return ret;
 726         }
 727
 728         if (desc_dma & 0x1) {
 729                 dev_dbg(dev, "%s RX tdown flow: %u\n", __func__, flow_idx);
 730                 return 0;
 731         }
 732
 733         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 734         dev_dbg(dev, "%s flow_idx: %u desc %pad\n",
 735                 __func__, flow_idx, &desc_dma);
 736
 737         swdata = cppi5_hdesc_get_swdata(desc_rx);
 738         skb = *swdata;
 739         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 740         pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
 741         cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
 742         dev_dbg(dev, "%s rx port_id:%d\n", __func__, port_id);
 743         port = am65_common_get_port(common, port_id);
 744         ndev = port->ndev;
 745         skb->dev = ndev;
 746
 747         psdata = cppi5_hdesc_get_psdata(desc_rx);
 748         csum_info = psdata[2];
 749         dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info);
 750
 751         dma_unmap_single(dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 752
 753         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 754
 755         new_skb = netdev_alloc_skb_ip_align(ndev, AM65_CPSW_MAX_PACKET_SIZE);
 756         if (new_skb) {
 757                 skb_put(skb, pkt_len);
 758                 skb->protocol = eth_type_trans(skb, ndev);
 759                 am65_cpsw_nuss_rx_csum(skb, csum_info);
 760                 napi_gro_receive(&common->napi_rx, skb);
 761
 762                 ndev_priv = netdev_priv(ndev);
 763                 stats = this_cpu_ptr(ndev_priv->stats);
 764
 765                 u64_stats_update_begin(&stats->syncp);
 766                 stats->rx_packets++;
 767                 stats->rx_bytes += pkt_len;
 768                 u64_stats_update_end(&stats->syncp);
 769                 kmemleak_not_leak(new_skb);
 770         } else {
 771                 ndev->stats.rx_dropped++;
 772                 new_skb = skb;
 773         }
 774
 775         if (netif_dormant(ndev)) {
 776                 dev_kfree_skb_any(new_skb);
 777                 ndev->stats.rx_dropped++;
 778                 return 0;
 779         }
 780
 781         ret = am65_cpsw_nuss_rx_push(common, new_skb);
 782         if (WARN_ON(ret < 0)) {
 783                 dev_kfree_skb_any(new_skb);
 784                 ndev->stats.rx_errors++;
 785                 ndev->stats.rx_dropped++;
 786         }
 787
 788         return ret;
 789 }
 790
 791 static int am65_cpsw_nuss_rx_poll(struct napi_struct *napi_rx, int budget)
 792 {
 793         struct am65_cpsw_common *common = am65_cpsw_napi_to_common(napi_rx);
 794         int flow = AM65_CPSW_MAX_RX_FLOWS;
 795         int cur_budget, ret;
 796         int num_rx = 0;
 797
 798         /* process every flow */
 799         while (flow--) {
 800                 cur_budget = budget - num_rx;
 801
 802                 while (cur_budget--) {
 803                         ret = am65_cpsw_nuss_rx_packets(common, flow);
 804                         if (ret)
 805                                 break;
 806                         num_rx++;
 807                 }
 808
 809                 if (num_rx >= budget)
 810                         break;
 811         }
 812
 813         dev_dbg(common->dev, "%s num_rx:%d %d\n", __func__, num_rx, budget);
 814
 815         if (num_rx < budget && napi_complete_done(napi_rx, num_rx))
 816                 enable_irq(common->rx_chns.irq);
 817
 818         return num_rx;
 819 }
 820
 821 static void am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn *tx_chn,
 822                                      struct device *dev,
 823                                      struct cppi5_host_desc_t *desc)
 824 {
 825         struct cppi5_host_desc_t *first_desc, *next_desc;
 826         dma_addr_t buf_dma, next_desc_dma;
 827         u32 buf_dma_len;
 828
 829         first_desc = desc;
 830         next_desc = first_desc;
 831
 832         cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
 833
 834         dma_unmap_single(dev, buf_dma, buf_dma_len,
 835                          DMA_TO_DEVICE);
 836
 837         next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
 838         while (next_desc_dma) {
 839                 next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 840                                                        next_desc_dma);
 841                 cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
 842
 843                 dma_unmap_page(dev, buf_dma, buf_dma_len,
 844                                DMA_TO_DEVICE);
 845
 846                 next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
 847
 848                 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
 849         }
 850
 851         k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
 852 }
 853
 854 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma)
 855 {
 856         struct am65_cpsw_tx_chn *tx_chn = data;
 857         struct cppi5_host_desc_t *desc_tx;
 858         struct sk_buff *skb;
 859         void **swdata;
 860
 861         desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
 862         swdata = cppi5_hdesc_get_swdata(desc_tx);
 863         skb = *(swdata);
 864         am65_cpsw_nuss_xmit_free(tx_chn, tx_chn->common->dev, desc_tx);
 865
 866         dev_kfree_skb_any(skb);
 867 }
 868
 869 static int am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common *common,
 870                                            int chn, unsigned int budget)
 871 {
 872         struct cppi5_host_desc_t *desc_tx;
 873         struct device *dev = common->dev;
 874         struct am65_cpsw_tx_chn *tx_chn;
 875         struct netdev_queue *netif_txq;
 876         unsigned int total_bytes = 0;
 877         struct net_device *ndev;
 878         struct sk_buff *skb;
 879         dma_addr_t desc_dma;
 880         int res, num_tx = 0;
 881         void **swdata;
 882
 883         tx_chn = &common->tx_chns[chn];
 884
 885         while (true) {
 886                 struct am65_cpsw_ndev_priv *ndev_priv;
 887                 struct am65_cpsw_ndev_stats *stats;
 888
 889                 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
 890                 if (res == -ENODATA)
 891                         break;
 892
 893                 if (desc_dma & 0x1) {
 894                         if (atomic_dec_and_test(&common->tdown_cnt))
 895                                 complete(&common->tdown_complete);
 896                         break;
 897                 }
 898
 899                 desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 900                                                      desc_dma);
 901                 swdata = cppi5_hdesc_get_swdata(desc_tx);
 902                 skb = *(swdata);
 903                 am65_cpsw_nuss_xmit_free(tx_chn, dev, desc_tx);
 904
 905                 ndev = skb->dev;
 906
 907                 ndev_priv = netdev_priv(ndev);
 908                 stats = this_cpu_ptr(ndev_priv->stats);
 909                 u64_stats_update_begin(&stats->syncp);
 910                 stats->tx_packets++;
 911                 stats->tx_bytes += skb->len;
 912                 u64_stats_update_end(&stats->syncp);
 913
 914                 total_bytes += skb->len;
 915                 napi_consume_skb(skb, budget);
 916                 num_tx++;
 917         }
 918
 919         if (!num_tx)
 920                 return 0;
 921
 922         netif_txq = netdev_get_tx_queue(ndev, chn);
 923
 924         netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
 925
 926         if (netif_tx_queue_stopped(netif_txq)) {
 927                 /* Check whether the queue is stopped due to stalled tx dma,
 928                  * if the queue is stopped then wake the queue as
 929                  * we have free desc for tx
 930                  */
 931                 __netif_tx_lock(netif_txq, smp_processor_id());
 932                 if (netif_running(ndev) &&
 933                     (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
 934                      MAX_SKB_FRAGS))
 935                         netif_tx_wake_queue(netif_txq);
 936
 937                 __netif_tx_unlock(netif_txq);
 938         }
 939         dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
 940
 941         return num_tx;
 942 }
 943
 944 static int am65_cpsw_nuss_tx_poll(struct napi_struct *napi_tx, int budget)
 945 {
 946         struct am65_cpsw_tx_chn *tx_chn = am65_cpsw_napi_to_tx_chn(napi_tx);
 947         int num_tx;
 948
 949         num_tx = am65_cpsw_nuss_tx_compl_packets(tx_chn->common, tx_chn->id,
 950                                                  budget);
 951         num_tx = min(num_tx, budget);
 952         if (num_tx < budget) {
 953                 napi_complete(napi_tx);
 954                 enable_irq(tx_chn->irq);
 955         }
 956
 957         return num_tx;
 958 }
 959
 960 static irqreturn_t am65_cpsw_nuss_rx_irq(int irq, void *dev_id)
 961 {
 962         struct am65_cpsw_common *common = dev_id;
 963
 964         disable_irq_nosync(irq);
 965         napi_schedule(&common->napi_rx);
 966
 967         return IRQ_HANDLED;
 968 }
 969
 970 static irqreturn_t am65_cpsw_nuss_tx_irq(int irq, void *dev_id)
 971 {
 972         struct am65_cpsw_tx_chn *tx_chn = dev_id;
 973
 974         disable_irq_nosync(irq);
 975         napi_schedule(&tx_chn->napi_tx);
 976
 977         return IRQ_HANDLED;
 978 }
 979
 980 static netdev_tx_t am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff *skb,
 981                                                  struct net_device *ndev)
 982 {
 983         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 984         struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
 985         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 986         struct device *dev = common->dev;
 987         struct am65_cpsw_tx_chn *tx_chn;
 988         struct netdev_queue *netif_txq;
 989         dma_addr_t desc_dma, buf_dma;
 990         int ret, q_idx, i;
 991         void **swdata;
 992         u32 *psdata;
 993         u32 pkt_len;
 994
 995         /* padding enabled in hw */
 996         pkt_len = skb_headlen(skb);
 997
 998         q_idx = skb_get_queue_mapping(skb);
 999         dev_dbg(dev, "%s skb_queue:%d\n", __func__, q_idx);
1000
1001         tx_chn = &common->tx_chns[q_idx];
1002         netif_txq = netdev_get_tx_queue(ndev, q_idx);
1003
1004         /* Map the linear buffer */
1005         buf_dma = dma_map_single(dev, skb->data, pkt_len,
1006                                  DMA_TO_DEVICE);
1007         if (unlikely(dma_mapping_error(dev, buf_dma))) {
1008                 dev_err(dev, "Failed to map tx skb buffer\n");
1009                 ndev->stats.tx_errors++;
1010                 goto err_free_skb;
1011         }
1012
1013         first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1014         if (!first_desc) {
1015                 dev_dbg(dev, "Failed to allocate descriptor\n");
1016                 dma_unmap_single(dev, buf_dma, pkt_len, DMA_TO_DEVICE);
1017                 goto busy_stop_q;
1018         }
1019
1020         cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
1021                          AM65_CPSW_NAV_PS_DATA_SIZE);
1022         cppi5_desc_set_pktids(&first_desc->hdr, 0, 0x3FFF);
1023         cppi5_hdesc_set_pkttype(first_desc, 0x7);
1024         cppi5_desc_set_tags_ids(&first_desc->hdr, 0, port->port_id);
1025
1026         cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
1027         swdata = cppi5_hdesc_get_swdata(first_desc);
1028         *(swdata) = skb;
1029         psdata = cppi5_hdesc_get_psdata(first_desc);
1030
1031         /* HW csum offload if enabled */
1032         psdata[2] = 0;
1033         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1034                 unsigned int cs_start, cs_offset;
1035
1036                 cs_start = skb_transport_offset(skb);
1037                 cs_offset = cs_start + skb->csum_offset;
1038                 /* HW numerates bytes starting from 1 */
1039                 psdata[2] = ((cs_offset + 1) << 24) |
1040                             ((cs_start + 1) << 16) | (skb->len - cs_start);
1041                 dev_dbg(dev, "%s tx psdata:%#x\n", __func__, psdata[2]);
1042         }
1043
1044         if (!skb_is_nonlinear(skb))
1045                 goto done_tx;
1046
1047         dev_dbg(dev, "fragmented SKB\n");
1048
1049         /* Handle the case where skb is fragmented in pages */
1050         cur_desc = first_desc;
1051         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1052                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1053                 u32 frag_size = skb_frag_size(frag);
1054
1055                 next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1056                 if (!next_desc) {
1057                         dev_err(dev, "Failed to allocate descriptor\n");
1058                         goto busy_free_descs;
1059                 }
1060
1061                 buf_dma = skb_frag_dma_map(dev, frag, 0, frag_size,
1062                                            DMA_TO_DEVICE);
1063                 if (unlikely(dma_mapping_error(dev, buf_dma))) {
1064                         dev_err(dev, "Failed to map tx skb page\n");
1065                         k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
1066                         ndev->stats.tx_errors++;
1067                         goto err_free_descs;
1068                 }
1069
1070                 cppi5_hdesc_reset_hbdesc(next_desc);
1071                 cppi5_hdesc_attach_buf(next_desc,
1072                                        buf_dma, frag_size, buf_dma, frag_size);
1073
1074                 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
1075                                                       next_desc);
1076                 cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
1077
1078                 pkt_len += frag_size;
1079                 cur_desc = next_desc;
1080         }
1081         WARN_ON(pkt_len != skb->len);
1082
1083 done_tx:
1084         skb_tx_timestamp(skb);
1085
1086         /* report bql before sending packet */
1087         netdev_tx_sent_queue(netif_txq, pkt_len);
1088
1089         cppi5_hdesc_set_pktlen(first_desc, pkt_len);
1090         desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
1091         ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1092         if (ret) {
1093                 dev_err(dev, "can't push desc %d\n", ret);
1094                 /* inform bql */
1095                 netdev_tx_completed_queue(netif_txq, 1, pkt_len);
1096                 ndev->stats.tx_errors++;
1097                 goto err_free_descs;
1098         }
1099
1100         if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
1101                 netif_tx_stop_queue(netif_txq);
1102                 /* Barrier, so that stop_queue visible to other cpus */
1103                 smp_mb__after_atomic();
1104                 dev_dbg(dev, "netif_tx_stop_queue %d\n", q_idx);
1105
1106                 /* re-check for smp */
1107                 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
1108                     MAX_SKB_FRAGS) {
1109                         netif_tx_wake_queue(netif_txq);
1110                         dev_dbg(dev, "netif_tx_wake_queue %d\n", q_idx);
1111                 }
1112         }
1113
1114         return NETDEV_TX_OK;
1115
1116 err_free_descs:
1117         am65_cpsw_nuss_xmit_free(tx_chn, dev, first_desc);
1118 err_free_skb:
1119         ndev->stats.tx_dropped++;
1120         dev_kfree_skb_any(skb);
1121         return NETDEV_TX_OK;
1122
1123 busy_free_descs:
1124         am65_cpsw_nuss_xmit_free(tx_chn, dev, first_desc);
1125 busy_stop_q:
1126         netif_tx_stop_queue(netif_txq);
1127         return NETDEV_TX_BUSY;
1128 }
1129
1130 static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev,
1131                                                     void *addr)
1132 {
1133         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1134         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1135         struct sockaddr *sockaddr = (struct sockaddr *)addr;
1136         int ret;
1137
1138         ret = eth_prepare_mac_addr_change(ndev, addr);
1139         if (ret < 0)
1140                 return ret;
1141
1142         ret = pm_runtime_get_sync(common->dev);
1143         if (ret < 0) {
1144                 pm_runtime_put_noidle(common->dev);
1145                 return ret;
1146         }
1147
1148         cpsw_ale_del_ucast(common->ale, ndev->dev_addr,
1149                            HOST_PORT_NUM, 0, 0);
1150         cpsw_ale_add_ucast(common->ale, sockaddr->sa_data,
1151                            HOST_PORT_NUM, ALE_SECURE, 0);
1152
1153         am65_cpsw_port_set_sl_mac(port, addr);
1154         eth_commit_mac_addr_change(ndev, sockaddr);
1155
1156         pm_runtime_put(common->dev);
1157
1158         return 0;
1159 }
1160
1161 static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev,
1162                                           struct ifreq *req, int cmd)
1163 {
1164         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1165
1166         if (!netif_running(ndev))
1167                 return -EINVAL;
1168
1169         if (!port->slave.phy)
1170                 return -EOPNOTSUPP;
1171
1172         return phy_mii_ioctl(port->slave.phy, req, cmd);
1173 }
1174
1175 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev,
1176                                          struct rtnl_link_stats64 *stats)
1177 {
1178         struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev);
1179         unsigned int start;
1180         int cpu;
1181
1182         for_each_possible_cpu(cpu) {
1183                 struct am65_cpsw_ndev_stats *cpu_stats;
1184                 u64 rx_packets;
1185                 u64 rx_bytes;
1186                 u64 tx_packets;
1187                 u64 tx_bytes;
1188
1189                 cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu);
1190                 do {
1191                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1192                         rx_packets = cpu_stats->rx_packets;
1193                         rx_bytes   = cpu_stats->rx_bytes;
1194                         tx_packets = cpu_stats->tx_packets;
1195                         tx_bytes   = cpu_stats->tx_bytes;
1196                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1197
1198                 stats->rx_packets += rx_packets;
1199                 stats->rx_bytes   += rx_bytes;
1200                 stats->tx_packets += tx_packets;
1201                 stats->tx_bytes   += tx_bytes;
1202         }
1203
1204         stats->rx_errors        = dev->stats.rx_errors;
1205         stats->rx_dropped       = dev->stats.rx_dropped;
1206         stats->tx_dropped       = dev->stats.tx_dropped;
1207 }
1208
1209 static int am65_cpsw_nuss_ndo_slave_set_features(struct net_device *ndev,
1210                                                  netdev_features_t features)
1211 {
1212         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1213         netdev_features_t changes = features ^ ndev->features;
1214         struct am65_cpsw_host *host_p;
1215
1216         host_p = am65_common_get_host(common);
1217
1218         if (changes & NETIF_F_HW_CSUM) {
1219                 bool enable = !!(features & NETIF_F_HW_CSUM);
1220
1221                 dev_info(common->dev, "Turn %s tx-checksum-ip-generic\n",
1222                          enable ? "ON" : "OFF");
1223                 if (enable)
1224                         writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN,
1225                                host_p->port_base + AM65_CPSW_P0_REG_CTL);
1226                 else
1227                         writel(0,
1228                                host_p->port_base + AM65_CPSW_P0_REG_CTL);
1229         }
1230
1231         return 0;
1232 }
1233
1234 static const struct net_device_ops am65_cpsw_nuss_netdev_ops_2g = {
1235         .ndo_open               = am65_cpsw_nuss_ndo_slave_open,
1236         .ndo_stop               = am65_cpsw_nuss_ndo_slave_stop,
1237         .ndo_start_xmit         = am65_cpsw_nuss_ndo_slave_xmit,
1238         .ndo_set_rx_mode        = am65_cpsw_nuss_ndo_slave_set_rx_mode,
1239         .ndo_get_stats64        = am65_cpsw_nuss_ndo_get_stats,
1240         .ndo_validate_addr      = eth_validate_addr,
1241         .ndo_set_mac_address    = am65_cpsw_nuss_ndo_slave_set_mac_address,
1242         .ndo_tx_timeout         = am65_cpsw_nuss_ndo_host_tx_timeout,
1243         .ndo_vlan_rx_add_vid    = am65_cpsw_nuss_ndo_slave_add_vid,
1244         .ndo_vlan_rx_kill_vid   = am65_cpsw_nuss_ndo_slave_kill_vid,
1245         .ndo_do_ioctl           = am65_cpsw_nuss_ndo_slave_ioctl,
1246         .ndo_set_features       = am65_cpsw_nuss_ndo_slave_set_features,
1247 };
1248
1249 static void am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port *port)
1250 {
1251         struct am65_cpsw_common *common = port->common;
1252
1253         if (!port->disabled)
1254                 return;
1255
1256         common->disabled_ports_mask |= BIT(port->port_id);
1257         cpsw_ale_control_set(common->ale, port->port_id,
1258                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1259
1260         cpsw_sl_reset(port->slave.mac_sl, 100);
1261         cpsw_sl_ctl_reset(port->slave.mac_sl);
1262 }
1263
1264 static void am65_cpsw_nuss_free_tx_chns(void *data)
1265 {
1266         struct am65_cpsw_common *common = data;
1267         int i;
1268
1269         for (i = 0; i < common->tx_ch_num; i++) {
1270                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1271
1272                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1273                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1274
1275                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1276                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1277
1278                 memset(tx_chn, 0, sizeof(*tx_chn));
1279         }
1280 }
1281
1282 void am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common *common)
1283 {
1284         struct device *dev = common->dev;
1285         int i;
1286
1287         devm_remove_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1288
1289         for (i = 0; i < common->tx_ch_num; i++) {
1290                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1291
1292                 if (tx_chn->irq)
1293                         devm_free_irq(dev, tx_chn->irq, tx_chn);
1294
1295                 netif_napi_del(&tx_chn->napi_tx);
1296
1297                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1298                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1299
1300                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1301                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1302
1303                 memset(tx_chn, 0, sizeof(*tx_chn));
1304         }
1305 }
1306
1307 static int am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common *common)
1308 {
1309         u32  max_desc_num = ALIGN(AM65_CPSW_MAX_TX_DESC, MAX_SKB_FRAGS);
1310         struct k3_udma_glue_tx_channel_cfg tx_cfg = { 0 };
1311         struct device *dev = common->dev;
1312         struct k3_ring_cfg ring_cfg = {
1313                 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1314                 .mode = K3_RINGACC_RING_MODE_RING,
1315                 .flags = 0
1316         };
1317         u32 hdesc_size;
1318         int i, ret = 0;
1319
1320         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1321                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1322
1323         tx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1324         tx_cfg.tx_cfg = ring_cfg;
1325         tx_cfg.txcq_cfg = ring_cfg;
1326         tx_cfg.tx_cfg.size = max_desc_num;
1327         tx_cfg.txcq_cfg.size = max_desc_num;
1328
1329         for (i = 0; i < common->tx_ch_num; i++) {
1330                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1331
1332                 snprintf(tx_chn->tx_chn_name,
1333                          sizeof(tx_chn->tx_chn_name), "tx%d", i);
1334
1335                 tx_chn->common = common;
1336                 tx_chn->id = i;
1337                 tx_chn->descs_num = max_desc_num;
1338                 tx_chn->desc_pool =
1339                         k3_cppi_desc_pool_create_name(dev,
1340                                                       tx_chn->descs_num,
1341                                                       hdesc_size,
1342                                                       tx_chn->tx_chn_name);
1343                 if (IS_ERR(tx_chn->desc_pool)) {
1344                         ret = PTR_ERR(tx_chn->desc_pool);
1345                         dev_err(dev, "Failed to create poll %d\n", ret);
1346                         goto err;
1347                 }
1348
1349                 tx_chn->tx_chn =
1350                         k3_udma_glue_request_tx_chn(dev,
1351                                                     tx_chn->tx_chn_name,
1352                                                     &tx_cfg);
1353                 if (IS_ERR(tx_chn->tx_chn)) {
1354                         ret = PTR_ERR(tx_chn->tx_chn);
1355                         dev_err(dev, "Failed to request tx dma channel %d\n",
1356                                 ret);
1357                         goto err;
1358                 }
1359
1360                 tx_chn->irq = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
1361                 if (tx_chn->irq <= 0) {
1362                         dev_err(dev, "Failed to get tx dma irq %d\n",
1363                                 tx_chn->irq);
1364                         goto err;
1365                 }
1366
1367                 snprintf(tx_chn->tx_chn_name,
1368                          sizeof(tx_chn->tx_chn_name), "%s-tx%d",
1369                          dev_name(dev), tx_chn->id);
1370         }
1371
1372 err:
1373         i = devm_add_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1374         if (i) {
1375                 dev_err(dev, "failed to add free_tx_chns action %d", i);
1376                 return i;
1377         }
1378
1379         return ret;
1380 }
1381
1382 static void am65_cpsw_nuss_free_rx_chns(void *data)
1383 {
1384         struct am65_cpsw_common *common = data;
1385         struct am65_cpsw_rx_chn *rx_chn;
1386
1387         rx_chn = &common->rx_chns;
1388
1389         if (!IS_ERR_OR_NULL(rx_chn->rx_chn))
1390                 k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
1391
1392         if (!IS_ERR_OR_NULL(rx_chn->desc_pool))
1393                 k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
1394 }
1395
1396 static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
1397 {
1398         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
1399         struct k3_udma_glue_rx_channel_cfg rx_cfg = { 0 };
1400         u32  max_desc_num = AM65_CPSW_MAX_RX_DESC;
1401         struct device *dev = common->dev;
1402         u32 hdesc_size;
1403         u32 fdqring_id;
1404         int i, ret = 0;
1405
1406         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1407                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1408
1409         rx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1410         rx_cfg.flow_id_num = AM65_CPSW_MAX_RX_FLOWS;
1411         rx_cfg.flow_id_base = common->rx_flow_id_base;
1412
1413         /* init all flows */
1414         rx_chn->dev = dev;
1415         rx_chn->descs_num = max_desc_num;
1416         rx_chn->desc_pool = k3_cppi_desc_pool_create_name(dev,
1417                                                           rx_chn->descs_num,
1418                                                           hdesc_size, "rx");
1419         if (IS_ERR(rx_chn->desc_pool)) {
1420                 ret = PTR_ERR(rx_chn->desc_pool);
1421                 dev_err(dev, "Failed to create rx poll %d\n", ret);
1422                 goto err;
1423         }
1424
1425         rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, "rx", &rx_cfg);
1426         if (IS_ERR(rx_chn->rx_chn)) {
1427                 ret = PTR_ERR(rx_chn->rx_chn);
1428                 dev_err(dev, "Failed to request rx dma channel %d\n", ret);
1429                 goto err;
1430         }
1431
1432         common->rx_flow_id_base =
1433                         k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
1434         dev_info(dev, "set new flow-id-base %u\n", common->rx_flow_id_base);
1435
1436         fdqring_id = K3_RINGACC_RING_ID_ANY;
1437         for (i = 0; i < rx_cfg.flow_id_num; i++) {
1438                 struct k3_ring_cfg rxring_cfg = {
1439                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1440                         .mode = K3_RINGACC_RING_MODE_RING,
1441                         .flags = 0,
1442                 };
1443                 struct k3_ring_cfg fdqring_cfg = {
1444                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1445                         .mode = K3_RINGACC_RING_MODE_MESSAGE,
1446                         .flags = K3_RINGACC_RING_SHARED,
1447                 };
1448                 struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
1449                         .rx_cfg = rxring_cfg,
1450                         .rxfdq_cfg = fdqring_cfg,
1451                         .ring_rxq_id = K3_RINGACC_RING_ID_ANY,
1452                         .src_tag_lo_sel =
1453                                 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
1454                 };
1455
1456                 rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
1457                 rx_flow_cfg.rx_cfg.size = max_desc_num;
1458                 rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
1459
1460                 ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
1461                                                 i, &rx_flow_cfg);
1462                 if (ret) {
1463                         dev_err(dev, "Failed to init rx flow%d %d\n", i, ret);
1464                         goto err;
1465                 }
1466                 if (!i)
1467                         fdqring_id =
1468                                 k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
1469                                                                 i);
1470
1471                 rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
1472
1473                 if (rx_chn->irq <= 0) {
1474                         dev_err(dev, "Failed to get rx dma irq %d\n",
1475                                 rx_chn->irq);
1476                         ret = -ENXIO;
1477                         goto err;
1478                 }
1479         }
1480
1481 err:
1482         i = devm_add_action(dev, am65_cpsw_nuss_free_rx_chns, common);
1483         if (i) {
1484                 dev_err(dev, "failed to add free_rx_chns action %d", i);
1485                 return i;
1486         }
1487
1488         return ret;
1489 }
1490
1491 static int am65_cpsw_nuss_init_host_p(struct am65_cpsw_common *common)
1492 {
1493         struct am65_cpsw_host *host_p = am65_common_get_host(common);
1494
1495         host_p->common = common;
1496         host_p->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE;
1497         host_p->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE;
1498
1499         return 0;
1500 }
1501
1502 static int am65_cpsw_am654_get_efuse_macid(struct device_node *of_node,
1503                                            int slave, u8 *mac_addr)
1504 {
1505         u32 mac_lo, mac_hi, offset;
1506         struct regmap *syscon;
1507         int ret;
1508
1509         syscon = syscon_regmap_lookup_by_phandle(of_node, "ti,syscon-efuse");
1510         if (IS_ERR(syscon)) {
1511                 if (PTR_ERR(syscon) == -ENODEV)
1512                         return 0;
1513                 return PTR_ERR(syscon);
1514         }
1515
1516         ret = of_property_read_u32_index(of_node, "ti,syscon-efuse", 1,
1517                                          &offset);
1518         if (ret)
1519                 return ret;
1520
1521         regmap_read(syscon, offset, &mac_lo);
1522         regmap_read(syscon, offset + 4, &mac_hi);
1523
1524         mac_addr[0] = (mac_hi >> 8) & 0xff;
1525         mac_addr[1] = mac_hi & 0xff;
1526         mac_addr[2] = (mac_lo >> 24) & 0xff;
1527         mac_addr[3] = (mac_lo >> 16) & 0xff;
1528         mac_addr[4] = (mac_lo >> 8) & 0xff;
1529         mac_addr[5] = mac_lo & 0xff;
1530
1531         return 0;
1532 }
1533
1534 static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
1535 {
1536         struct device_node *node, *port_np;
1537         struct device *dev = common->dev;
1538         int ret;
1539
1540         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
1541         if (!node)
1542                 return -ENOENT;
1543
1544         for_each_child_of_node(node, port_np) {
1545                 struct am65_cpsw_port *port;
1546                 const void *mac_addr;
1547                 u32 port_id;
1548
1549                 /* it is not a slave port node, continue */
1550                 if (strcmp(port_np->name, "port"))
1551                         continue;
1552
1553                 ret = of_property_read_u32(port_np, "reg", &port_id);
1554                 if (ret < 0) {
1555                         dev_err(dev, "%pOF error reading port_id %d\n",
1556                                 port_np, ret);
1557                         return ret;
1558                 }
1559
1560                 if (!port_id || port_id > common->port_num) {
1561                         dev_err(dev, "%pOF has invalid port_id %u %s\n",
1562                                 port_np, port_id, port_np->name);
1563                         return -EINVAL;
1564                 }
1565
1566                 port = am65_common_get_port(common, port_id);
1567                 port->port_id = port_id;
1568                 port->common = common;
1569                 port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE +
1570                                   AM65_CPSW_NU_PORTS_OFFSET * (port_id);
1571                 port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE +
1572                                   (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id);
1573                 port->name = of_get_property(port_np, "label", NULL);
1574
1575                 port->disabled = !of_device_is_available(port_np);
1576                 if (port->disabled)
1577                         continue;
1578
1579                 port->slave.ifphy = devm_of_phy_get(dev, port_np, NULL);
1580                 if (IS_ERR(port->slave.ifphy)) {
1581                         ret = PTR_ERR(port->slave.ifphy);
1582                         dev_err(dev, "%pOF error retrieving port phy: %d\n",
1583                                 port_np, ret);
1584                         return ret;
1585                 }
1586
1587                 port->slave.mac_only =
1588                                 of_property_read_bool(port_np, "ti,mac-only");
1589
1590                 /* get phy/link info */
1591                 if (of_phy_is_fixed_link(port_np)) {
1592                         ret = of_phy_register_fixed_link(port_np);
1593                         if (ret) {
1594                                 if (ret != -EPROBE_DEFER)
1595                                         dev_err(dev, "%pOF failed to register fixed-link phy: %d\n",
1596                                                 port_np, ret);
1597                                 return ret;
1598                         }
1599                         port->slave.phy_node = of_node_get(port_np);
1600                 } else {
1601                         port->slave.phy_node =
1602                                 of_parse_phandle(port_np, "phy-handle", 0);
1603                 }
1604
1605                 if (!port->slave.phy_node) {
1606                         dev_err(dev,
1607                                 "slave[%d] no phy found\n", port_id);
1608                         return -ENODEV;
1609                 }
1610
1611                 ret = of_get_phy_mode(port_np, &port->slave.phy_if);
1612                 if (ret) {
1613                         dev_err(dev, "%pOF read phy-mode err %d\n",
1614                                 port_np, ret);
1615                         return ret;
1616                 }
1617
1618                 port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base);
1619                 if (IS_ERR(port->slave.mac_sl))
1620                         return PTR_ERR(port->slave.mac_sl);
1621
1622                 mac_addr = of_get_mac_address(port_np);
1623                 if (!IS_ERR(mac_addr)) {
1624                         ether_addr_copy(port->slave.mac_addr, mac_addr);
1625                 } else if (am65_cpsw_am654_get_efuse_macid(port_np,
1626                                                            port->port_id,
1627                                                            port->slave.mac_addr) ||
1628                            !is_valid_ether_addr(port->slave.mac_addr)) {
1629                         random_ether_addr(port->slave.mac_addr);
1630                         dev_err(dev, "Use rundom MAC address\n");
1631                 }
1632         }
1633         of_node_put(node);
1634
1635         return 0;
1636 }
1637
1638 static void am65_cpsw_pcpu_stats_free(void *data)
1639 {
1640         struct am65_cpsw_ndev_stats __percpu *stats = data;
1641
1642         free_percpu(stats);
1643 }
1644
1645 static int am65_cpsw_nuss_init_ndev_2g(struct am65_cpsw_common *common)
1646 {
1647         struct am65_cpsw_ndev_priv *ndev_priv;
1648         struct device *dev = common->dev;
1649         struct am65_cpsw_port *port;
1650         int ret;
1651
1652         port = am65_common_get_port(common, 1);
1653
1654         /* alloc netdev */
1655         port->ndev = devm_alloc_etherdev_mqs(common->dev,
1656                                              sizeof(struct am65_cpsw_ndev_priv),
1657                                              AM65_CPSW_MAX_TX_QUEUES,
1658                                              AM65_CPSW_MAX_RX_QUEUES);
1659         if (!port->ndev) {
1660                 dev_err(dev, "error allocating slave net_device %u\n",
1661                         port->port_id);
1662                 return -ENOMEM;
1663         }
1664
1665         ndev_priv = netdev_priv(port->ndev);
1666         ndev_priv->port = port;
1667         ndev_priv->msg_enable = AM65_CPSW_DEBUG;
1668         SET_NETDEV_DEV(port->ndev, dev);
1669
1670         ether_addr_copy(port->ndev->dev_addr, port->slave.mac_addr);
1671
1672         port->ndev->min_mtu = AM65_CPSW_MIN_PACKET_SIZE;
1673         port->ndev->max_mtu = AM65_CPSW_MAX_PACKET_SIZE;
1674         port->ndev->hw_features = NETIF_F_SG |
1675                                   NETIF_F_RXCSUM |
1676                                   NETIF_F_HW_CSUM;
1677         port->ndev->features = port->ndev->hw_features |
1678                                NETIF_F_HW_VLAN_CTAG_FILTER;
1679         port->ndev->vlan_features |=  NETIF_F_SG;
1680         port->ndev->netdev_ops = &am65_cpsw_nuss_netdev_ops_2g;
1681         port->ndev->ethtool_ops = &am65_cpsw_ethtool_ops_slave;
1682
1683         /* Disable TX checksum offload by default due to HW bug */
1684         if (common->pdata->quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM)
1685                 port->ndev->features &= ~NETIF_F_HW_CSUM;
1686
1687         ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats);
1688         if (!ndev_priv->stats)
1689                 return -ENOMEM;
1690
1691         ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free,
1692                                        ndev_priv->stats);
1693         if (ret) {
1694                 dev_err(dev, "failed to add percpu stat free action %d", ret);
1695                 return ret;
1696         }
1697
1698         netif_napi_add(port->ndev, &common->napi_rx,
1699                        am65_cpsw_nuss_rx_poll, NAPI_POLL_WEIGHT);
1700
1701         common->pf_p0_rx_ptype_rrobin = false;
1702
1703         return ret;
1704 }
1705
1706 static int am65_cpsw_nuss_ndev_add_napi_2g(struct am65_cpsw_common *common)
1707 {
1708         struct device *dev = common->dev;
1709         struct am65_cpsw_port *port;
1710         int i, ret = 0;
1711
1712         port = am65_common_get_port(common, 1);
1713
1714         for (i = 0; i < common->tx_ch_num; i++) {
1715                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1716
1717                 netif_tx_napi_add(port->ndev, &tx_chn->napi_tx,
1718                                   am65_cpsw_nuss_tx_poll, NAPI_POLL_WEIGHT);
1719
1720                 ret = devm_request_irq(dev, tx_chn->irq,
1721                                        am65_cpsw_nuss_tx_irq,
1722                                        0, tx_chn->tx_chn_name, tx_chn);
1723                 if (ret) {
1724                         dev_err(dev, "failure requesting tx%u irq %u, %d\n",
1725                                 tx_chn->id, tx_chn->irq, ret);
1726                         goto err;
1727                 }
1728         }
1729
1730 err:
1731         return ret;
1732 }
1733
1734 static int am65_cpsw_nuss_ndev_reg_2g(struct am65_cpsw_common *common)
1735 {
1736         struct device *dev = common->dev;
1737         struct am65_cpsw_port *port;
1738         int ret = 0;
1739
1740         port = am65_common_get_port(common, 1);
1741         ret = am65_cpsw_nuss_ndev_add_napi_2g(common);
1742         if (ret)
1743                 goto err;
1744
1745         ret = devm_request_irq(dev, common->rx_chns.irq,
1746                                am65_cpsw_nuss_rx_irq,
1747                                0, dev_name(dev), common);
1748         if (ret) {
1749                 dev_err(dev, "failure requesting rx irq %u, %d\n",
1750                         common->rx_chns.irq, ret);
1751                 goto err;
1752         }
1753
1754         ret = register_netdev(port->ndev);
1755         if (ret)
1756                 dev_err(dev, "error registering slave net device %d\n", ret);
1757
1758         /* can't auto unregister ndev using devm_add_action() due to
1759          * devres release sequence in DD core for DMA
1760          */
1761 err:
1762         return ret;
1763 }
1764
1765 int am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common *common, int num_tx)
1766 {
1767         int ret;
1768
1769         common->tx_ch_num = num_tx;
1770         ret = am65_cpsw_nuss_init_tx_chns(common);
1771         if (ret)
1772                 return ret;
1773
1774         return am65_cpsw_nuss_ndev_add_napi_2g(common);
1775 }
1776
1777 static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common)
1778 {
1779         struct am65_cpsw_port *port;
1780         int i;
1781
1782         for (i = 0; i < common->port_num; i++) {
1783                 port = &common->ports[i];
1784                 if (port->ndev)
1785                         unregister_netdev(port->ndev);
1786         }
1787 }
1788
1789 static const struct am65_cpsw_pdata am65x_sr1_0 = {
1790         .quirks = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
1791 };
1792
1793 static const struct am65_cpsw_pdata j721e_sr1_0 = {
1794         .quirks = 0,
1795 };
1796
1797 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
1798         { .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0 },
1799         { .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_sr1_0 },
1800         { /* sentinel */ },
1801 };
1802 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);
1803
1804 static int am65_cpsw_nuss_probe(struct platform_device *pdev)
1805 {
1806         struct cpsw_ale_params ale_params;
1807         const struct of_device_id *of_id;
1808         struct device *dev = &pdev->dev;
1809         struct am65_cpsw_common *common;
1810         struct device_node *node;
1811         struct resource *res;
1812         int ret, i;
1813
1814         common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
1815         if (!common)
1816                 return -ENOMEM;
1817         common->dev = dev;
1818
1819         of_id = of_match_device(am65_cpsw_nuss_of_mtable, dev);
1820         if (!of_id)
1821                 return -EINVAL;
1822         common->pdata = of_id->data;
1823
1824         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cpsw_nuss");
1825         common->ss_base = devm_ioremap_resource(&pdev->dev, res);
1826         if (IS_ERR(common->ss_base))
1827                 return PTR_ERR(common->ss_base);
1828         common->cpsw_base = common->ss_base + AM65_CPSW_CPSW_NU_BASE;
1829
1830         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
1831         if (!node)
1832                 return -ENOENT;
1833         common->port_num = of_get_child_count(node);
1834         if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS)
1835                 return -ENOENT;
1836         of_node_put(node);
1837
1838         if (common->port_num != 1)
1839                 return -EOPNOTSUPP;
1840
1841         common->rx_flow_id_base = -1;
1842         init_completion(&common->tdown_complete);
1843         common->tx_ch_num = 1;
1844
1845         ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(48));
1846         if (ret) {
1847                 dev_err(dev, "error setting dma mask: %d\n", ret);
1848                 return ret;
1849         }
1850
1851         common->ports = devm_kcalloc(dev, common->port_num,
1852                                      sizeof(*common->ports),
1853                                      GFP_KERNEL);
1854         if (!common->ports)
1855                 return -ENOMEM;
1856
1857         pm_runtime_enable(dev);
1858         ret = pm_runtime_get_sync(dev);
1859         if (ret < 0) {
1860                 pm_runtime_put_noidle(dev);
1861                 pm_runtime_disable(dev);
1862                 return ret;
1863         }
1864
1865         ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
1866         /* We do not want to force this, as in some cases may not have child */
1867         if (ret)
1868                 dev_warn(dev, "populating child nodes err:%d\n", ret);
1869
1870         am65_cpsw_nuss_get_ver(common);
1871
1872         /* init tx channels */
1873         ret = am65_cpsw_nuss_init_tx_chns(common);
1874         if (ret)
1875                 goto err_of_clear;
1876         ret = am65_cpsw_nuss_init_rx_chns(common);
1877         if (ret)
1878                 goto err_of_clear;
1879
1880         ret = am65_cpsw_nuss_init_host_p(common);
1881         if (ret)
1882                 goto err_of_clear;
1883
1884         ret = am65_cpsw_nuss_init_slave_ports(common);
1885         if (ret)
1886                 goto err_of_clear;
1887
1888         /* init common data */
1889         ale_params.dev = dev;
1890         ale_params.ale_ageout = AM65_CPSW_ALE_AGEOUT_DEFAULT;
1891         ale_params.ale_entries = 0;
1892         ale_params.ale_ports = common->port_num + 1;
1893         ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE;
1894         ale_params.nu_switch_ale = true;
1895
1896         common->ale = cpsw_ale_create(&ale_params);
1897         if (!common->ale) {
1898                 dev_err(dev, "error initializing ale engine\n");
1899                 goto err_of_clear;
1900         }
1901
1902         /* init ports */
1903         for (i = 0; i < common->port_num; i++)
1904                 am65_cpsw_nuss_slave_disable_unused(&common->ports[i]);
1905
1906         dev_set_drvdata(dev, common);
1907
1908         ret = am65_cpsw_nuss_init_ndev_2g(common);
1909         if (ret)
1910                 goto err_of_clear;
1911
1912         ret = am65_cpsw_nuss_ndev_reg_2g(common);
1913         if (ret)
1914                 goto err_of_clear;
1915
1916         pm_runtime_put(dev);
1917         return 0;
1918
1919 err_of_clear:
1920         of_platform_depopulate(dev);
1921         pm_runtime_put_sync(dev);
1922         pm_runtime_disable(dev);
1923         return ret;
1924 }
1925
1926 static int am65_cpsw_nuss_remove(struct platform_device *pdev)
1927 {
1928         struct device *dev = &pdev->dev;
1929         struct am65_cpsw_common *common;
1930         int ret;
1931
1932         common = dev_get_drvdata(dev);
1933
1934         ret = pm_runtime_get_sync(&pdev->dev);
1935         if (ret < 0) {
1936                 pm_runtime_put_noidle(&pdev->dev);
1937                 return ret;
1938         }
1939
1940         /* must unregister ndevs here because DD release_driver routine calls
1941          * dma_deconfigure(dev) before devres_release_all(dev)
1942          */
1943         am65_cpsw_nuss_cleanup_ndev(common);
1944
1945         of_platform_depopulate(dev);
1946
1947         pm_runtime_put_sync(&pdev->dev);
1948         pm_runtime_disable(&pdev->dev);
1949         return 0;
1950 }
1951
1952 static struct platform_driver am65_cpsw_nuss_driver = {
1953         .driver = {
1954                 .name    = AM65_CPSW_DRV_NAME,
1955                 .of_match_table = am65_cpsw_nuss_of_mtable,
1956         },
1957         .probe = am65_cpsw_nuss_probe,
1958         .remove = am65_cpsw_nuss_remove,
1959 };
1960
1961 module_platform_driver(am65_cpsw_nuss_driver);
1962
1963 MODULE_LICENSE("GPL v2");
1964 MODULE_AUTHOR("Grygorii Strashko <grygorii.strashko@ti.com>");
1965 MODULE_DESCRIPTION("TI AM65 CPSW Ethernet driver");