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/irqdomain.h>
  13 #include <linux/kernel.h>
  14 #include <linux/kmemleak.h>
  15 #include <linux/module.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/net_tstamp.h>
  18 #include <linux/of.h>
  19 #include <linux/of_mdio.h>
  20 #include <linux/of_net.h>
  21 #include <linux/of_device.h>
  22 #include <linux/phylink.h>
  23 #include <linux/phy/phy.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/regmap.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/mfd/syscon.h>
  29 #include <linux/sys_soc.h>
  30 #include <linux/dma/ti-cppi5.h>
  31 #include <linux/dma/k3-udma-glue.h>
  32 #include <net/switchdev.h>
  33
  34 #include "cpsw_ale.h"
  35 #include "cpsw_sl.h"
  36 #include "am65-cpsw-nuss.h"
  37 #include "am65-cpsw-switchdev.h"
  38 #include "k3-cppi-desc-pool.h"
  39 #include "am65-cpts.h"
  40
  41 #define AM65_CPSW_SS_BASE       0x0
  42 #define AM65_CPSW_SGMII_BASE    0x100
  43 #define AM65_CPSW_XGMII_BASE    0x2100
  44 #define AM65_CPSW_CPSW_NU_BASE  0x20000
  45 #define AM65_CPSW_NU_PORTS_BASE 0x1000
  46 #define AM65_CPSW_NU_FRAM_BASE  0x12000
  47 #define AM65_CPSW_NU_STATS_BASE 0x1a000
  48 #define AM65_CPSW_NU_ALE_BASE   0x1e000
  49 #define AM65_CPSW_NU_CPTS_BASE  0x1d000
  50
  51 #define AM65_CPSW_NU_PORTS_OFFSET       0x1000
  52 #define AM65_CPSW_NU_STATS_PORT_OFFSET  0x200
  53 #define AM65_CPSW_NU_FRAM_PORT_OFFSET   0x200
  54
  55 #define AM65_CPSW_MAX_PORTS     8
  56
  57 #define AM65_CPSW_MIN_PACKET_SIZE       VLAN_ETH_ZLEN
  58 #define AM65_CPSW_MAX_PACKET_SIZE       (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
  59
  60 #define AM65_CPSW_REG_CTL               0x004
  61 #define AM65_CPSW_REG_STAT_PORT_EN      0x014
  62 #define AM65_CPSW_REG_PTYPE             0x018
  63
  64 #define AM65_CPSW_P0_REG_CTL                    0x004
  65 #define AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET      0x008
  66
  67 #define AM65_CPSW_PORT_REG_PRI_CTL              0x01c
  68 #define AM65_CPSW_PORT_REG_RX_PRI_MAP           0x020
  69 #define AM65_CPSW_PORT_REG_RX_MAXLEN            0x024
  70
  71 #define AM65_CPSW_PORTN_REG_SA_L                0x308
  72 #define AM65_CPSW_PORTN_REG_SA_H                0x30c
  73 #define AM65_CPSW_PORTN_REG_TS_CTL              0x310
  74 #define AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG    0x314
  75 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG   0x318
  76 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2       0x31C
  77
  78 #define AM65_CPSW_SGMII_CONTROL_REG             0x010
  79 #define AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE    BIT(0)
  80
  81 #define AM65_CPSW_CTL_VLAN_AWARE                BIT(1)
  82 #define AM65_CPSW_CTL_P0_ENABLE                 BIT(2)
  83 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE          BIT(13)
  84 #define AM65_CPSW_CTL_P0_RX_PAD                 BIT(14)
  85
  86 /* AM65_CPSW_P0_REG_CTL */
  87 #define AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN     BIT(0)
  88
  89 /* AM65_CPSW_PORT_REG_PRI_CTL */
  90 #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN      BIT(8)
  91
  92 /* AM65_CPSW_PN_TS_CTL register fields */
  93 #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN         BIT(4)
  94 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN      BIT(5)
  95 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT2_EN      BIT(6)
  96 #define AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN         BIT(7)
  97 #define AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN         BIT(10)
  98 #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN       BIT(11)
  99 #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT   16
 100
 101 /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */
 102 #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT     16
 103
 104 /* AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 */
 105 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107       BIT(16)
 106 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129       BIT(17)
 107 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130       BIT(18)
 108 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131       BIT(19)
 109 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132       BIT(20)
 110 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319       BIT(21)
 111 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320       BIT(22)
 112 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO BIT(23)
 113
 114 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
 115 #define AM65_CPSW_TS_EVENT_MSG_TYPE_BITS (BIT(0) | BIT(1) | BIT(2) | BIT(3))
 116
 117 #define AM65_CPSW_TS_SEQ_ID_OFFSET (0x1e)
 118
 119 #define AM65_CPSW_TS_TX_ANX_ALL_EN              \
 120         (AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN |      \
 121          AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN |      \
 122          AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN)
 123
 124 #define AM65_CPSW_ALE_AGEOUT_DEFAULT    30
 125 /* Number of TX/RX descriptors */
 126 #define AM65_CPSW_MAX_TX_DESC   500
 127 #define AM65_CPSW_MAX_RX_DESC   500
 128
 129 #define AM65_CPSW_NAV_PS_DATA_SIZE 16
 130 #define AM65_CPSW_NAV_SW_DATA_SIZE 16
 131
 132 #define AM65_CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK | \
 133                          NETIF_MSG_IFUP | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | \
 134                          NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
 135
 136 static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave,
 137                                       const u8 *dev_addr)
 138 {
 139         u32 mac_hi = (dev_addr[0] << 0) | (dev_addr[1] << 8) |
 140                      (dev_addr[2] << 16) | (dev_addr[3] << 24);
 141         u32 mac_lo = (dev_addr[4] << 0) | (dev_addr[5] << 8);
 142
 143         writel(mac_hi, slave->port_base + AM65_CPSW_PORTN_REG_SA_H);
 144         writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L);
 145 }
 146
 147 static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port)
 148 {
 149         cpsw_sl_reset(port->slave.mac_sl, 100);
 150         /* Max length register has to be restored after MAC SL reset */
 151         writel(AM65_CPSW_MAX_PACKET_SIZE,
 152                port->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 153 }
 154
 155 static void am65_cpsw_nuss_get_ver(struct am65_cpsw_common *common)
 156 {
 157         common->nuss_ver = readl(common->ss_base);
 158         common->cpsw_ver = readl(common->cpsw_base);
 159         dev_info(common->dev,
 160                  "initializing am65 cpsw nuss version 0x%08X, cpsw version 0x%08X Ports: %u quirks:%08x\n",
 161                 common->nuss_ver,
 162                 common->cpsw_ver,
 163                 common->port_num + 1,
 164                 common->pdata.quirks);
 165 }
 166
 167 static int am65_cpsw_nuss_ndo_slave_add_vid(struct net_device *ndev,
 168                                             __be16 proto, u16 vid)
 169 {
 170         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 171         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 172         u32 port_mask, unreg_mcast = 0;
 173         int ret;
 174
 175         if (!common->is_emac_mode)
 176                 return 0;
 177
 178         if (!netif_running(ndev) || !vid)
 179                 return 0;
 180
 181         ret = pm_runtime_resume_and_get(common->dev);
 182         if (ret < 0)
 183                 return ret;
 184
 185         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
 186         if (!vid)
 187                 unreg_mcast = port_mask;
 188         dev_info(common->dev, "Adding vlan %d to vlan filter\n", vid);
 189         ret = cpsw_ale_vlan_add_modify(common->ale, vid, port_mask,
 190                                        unreg_mcast, port_mask, 0);
 191
 192         pm_runtime_put(common->dev);
 193         return ret;
 194 }
 195
 196 static int am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device *ndev,
 197                                              __be16 proto, u16 vid)
 198 {
 199         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 200         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 201         int ret;
 202
 203         if (!common->is_emac_mode)
 204                 return 0;
 205
 206         if (!netif_running(ndev) || !vid)
 207                 return 0;
 208
 209         ret = pm_runtime_resume_and_get(common->dev);
 210         if (ret < 0)
 211                 return ret;
 212
 213         dev_info(common->dev, "Removing vlan %d from vlan filter\n", vid);
 214         ret = cpsw_ale_del_vlan(common->ale, vid,
 215                                 BIT(port->port_id) | ALE_PORT_HOST);
 216
 217         pm_runtime_put(common->dev);
 218         return ret;
 219 }
 220
 221 static void am65_cpsw_slave_set_promisc(struct am65_cpsw_port *port,
 222                                         bool promisc)
 223 {
 224         struct am65_cpsw_common *common = port->common;
 225
 226         if (promisc && !common->is_emac_mode) {
 227                 dev_dbg(common->dev, "promisc mode requested in switch mode");
 228                 return;
 229         }
 230
 231         if (promisc) {
 232                 /* Enable promiscuous mode */
 233                 cpsw_ale_control_set(common->ale, port->port_id,
 234                                      ALE_PORT_MACONLY_CAF, 1);
 235                 dev_dbg(common->dev, "promisc enabled\n");
 236         } else {
 237                 /* Disable promiscuous mode */
 238                 cpsw_ale_control_set(common->ale, port->port_id,
 239                                      ALE_PORT_MACONLY_CAF, 0);
 240                 dev_dbg(common->dev, "promisc disabled\n");
 241         }
 242 }
 243
 244 static void am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device *ndev)
 245 {
 246         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 247         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 248         u32 port_mask;
 249         bool promisc;
 250
 251         promisc = !!(ndev->flags & IFF_PROMISC);
 252         am65_cpsw_slave_set_promisc(port, promisc);
 253
 254         if (promisc)
 255                 return;
 256
 257         /* Restore allmulti on vlans if necessary */
 258         cpsw_ale_set_allmulti(common->ale,
 259                               ndev->flags & IFF_ALLMULTI, port->port_id);
 260
 261         port_mask = ALE_PORT_HOST;
 262         /* Clear all mcast from ALE */
 263         cpsw_ale_flush_multicast(common->ale, port_mask, -1);
 264
 265         if (!netdev_mc_empty(ndev)) {
 266                 struct netdev_hw_addr *ha;
 267
 268                 /* program multicast address list into ALE register */
 269                 netdev_for_each_mc_addr(ha, ndev) {
 270                         cpsw_ale_add_mcast(common->ale, ha->addr,
 271                                            port_mask, 0, 0, 0);
 272                 }
 273         }
 274 }
 275
 276 static void am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device *ndev,
 277                                                unsigned int txqueue)
 278 {
 279         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 280         struct am65_cpsw_tx_chn *tx_chn;
 281         struct netdev_queue *netif_txq;
 282         unsigned long trans_start;
 283
 284         netif_txq = netdev_get_tx_queue(ndev, txqueue);
 285         tx_chn = &common->tx_chns[txqueue];
 286         trans_start = READ_ONCE(netif_txq->trans_start);
 287
 288         netdev_err(ndev, "txq:%d DRV_XOFF:%d tmo:%u dql_avail:%d free_desc:%zu\n",
 289                    txqueue,
 290                    netif_tx_queue_stopped(netif_txq),
 291                    jiffies_to_msecs(jiffies - trans_start),
 292                    dql_avail(&netif_txq->dql),
 293                    k3_cppi_desc_pool_avail(tx_chn->desc_pool));
 294
 295         if (netif_tx_queue_stopped(netif_txq)) {
 296                 /* try recover if stopped by us */
 297                 txq_trans_update(netif_txq);
 298                 netif_tx_wake_queue(netif_txq);
 299         }
 300 }
 301
 302 static int am65_cpsw_nuss_rx_push(struct am65_cpsw_common *common,
 303                                   struct sk_buff *skb)
 304 {
 305         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 306         struct cppi5_host_desc_t *desc_rx;
 307         struct device *dev = common->dev;
 308         u32 pkt_len = skb_tailroom(skb);
 309         dma_addr_t desc_dma;
 310         dma_addr_t buf_dma;
 311         void *swdata;
 312
 313         desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
 314         if (!desc_rx) {
 315                 dev_err(dev, "Failed to allocate RXFDQ descriptor\n");
 316                 return -ENOMEM;
 317         }
 318         desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
 319
 320         buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len,
 321                                  DMA_FROM_DEVICE);
 322         if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) {
 323                 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 324                 dev_err(dev, "Failed to map rx skb buffer\n");
 325                 return -EINVAL;
 326         }
 327
 328         cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
 329                          AM65_CPSW_NAV_PS_DATA_SIZE);
 330         k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma);
 331         cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb));
 332         swdata = cppi5_hdesc_get_swdata(desc_rx);
 333         *((void **)swdata) = skb;
 334
 335         return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma);
 336 }
 337
 338 void am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common *common)
 339 {
 340         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 341         u32 val, pri_map;
 342
 343         /* P0 set Receive Priority Type */
 344         val = readl(host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 345
 346         if (common->pf_p0_rx_ptype_rrobin) {
 347                 val |= AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 348                 /* Enet Ports fifos works in fixed priority mode only, so
 349                  * reset P0_Rx_Pri_Map so all packet will go in Enet fifo 0
 350                  */
 351                 pri_map = 0x0;
 352         } else {
 353                 val &= ~AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
 354                 /* restore P0_Rx_Pri_Map */
 355                 pri_map = 0x76543210;
 356         }
 357
 358         writel(pri_map, host_p->port_base + AM65_CPSW_PORT_REG_RX_PRI_MAP);
 359         writel(val, host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
 360 }
 361
 362 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common);
 363 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common);
 364 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port);
 365 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port);
 366
 367 static int am65_cpsw_nuss_common_open(struct am65_cpsw_common *common)
 368 {
 369         struct am65_cpsw_host *host_p = am65_common_get_host(common);
 370         int port_idx, i, ret;
 371         struct sk_buff *skb;
 372         u32 val, port_mask;
 373
 374         if (common->usage_count)
 375                 return 0;
 376
 377         /* Control register */
 378         writel(AM65_CPSW_CTL_P0_ENABLE | AM65_CPSW_CTL_P0_TX_CRC_REMOVE |
 379                AM65_CPSW_CTL_VLAN_AWARE | AM65_CPSW_CTL_P0_RX_PAD,
 380                common->cpsw_base + AM65_CPSW_REG_CTL);
 381         /* Max length register */
 382         writel(AM65_CPSW_MAX_PACKET_SIZE,
 383                host_p->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
 384         /* set base flow_id */
 385         writel(common->rx_flow_id_base,
 386                host_p->port_base + AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET);
 387         /* en tx crc offload */
 388         writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN, host_p->port_base + AM65_CPSW_P0_REG_CTL);
 389
 390         am65_cpsw_nuss_set_p0_ptype(common);
 391
 392         /* enable statistic */
 393         val = BIT(HOST_PORT_NUM);
 394         for (port_idx = 0; port_idx < common->port_num; port_idx++) {
 395                 struct am65_cpsw_port *port = &common->ports[port_idx];
 396
 397                 if (!port->disabled)
 398                         val |=  BIT(port->port_id);
 399         }
 400         writel(val, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 401
 402         /* disable priority elevation */
 403         writel(0, common->cpsw_base + AM65_CPSW_REG_PTYPE);
 404
 405         cpsw_ale_start(common->ale);
 406
 407         /* limit to one RX flow only */
 408         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 409                              ALE_DEFAULT_THREAD_ID, 0);
 410         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 411                              ALE_DEFAULT_THREAD_ENABLE, 1);
 412         /* switch to vlan unaware mode */
 413         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 1);
 414         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 415                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 416
 417         /* default vlan cfg: create mask based on enabled ports */
 418         port_mask = GENMASK(common->port_num, 0) &
 419                     ~common->disabled_ports_mask;
 420
 421         cpsw_ale_add_vlan(common->ale, 0, port_mask,
 422                           port_mask, port_mask,
 423                           port_mask & ~ALE_PORT_HOST);
 424
 425         if (common->is_emac_mode)
 426                 am65_cpsw_init_host_port_emac(common);
 427         else
 428                 am65_cpsw_init_host_port_switch(common);
 429
 430         for (i = 0; i < common->rx_chns.descs_num; i++) {
 431                 skb = __netdev_alloc_skb_ip_align(NULL,
 432                                                   AM65_CPSW_MAX_PACKET_SIZE,
 433                                                   GFP_KERNEL);
 434                 if (!skb) {
 435                         dev_err(common->dev, "cannot allocate skb\n");
 436                         return -ENOMEM;
 437                 }
 438
 439                 ret = am65_cpsw_nuss_rx_push(common, skb);
 440                 if (ret < 0) {
 441                         dev_err(common->dev,
 442                                 "cannot submit skb to channel rx, error %d\n",
 443                                 ret);
 444                         kfree_skb(skb);
 445                         return ret;
 446                 }
 447                 kmemleak_not_leak(skb);
 448         }
 449         k3_udma_glue_enable_rx_chn(common->rx_chns.rx_chn);
 450
 451         for (i = 0; i < common->tx_ch_num; i++) {
 452                 ret = k3_udma_glue_enable_tx_chn(common->tx_chns[i].tx_chn);
 453                 if (ret)
 454                         return ret;
 455                 napi_enable(&common->tx_chns[i].napi_tx);
 456         }
 457
 458         napi_enable(&common->napi_rx);
 459         if (common->rx_irq_disabled) {
 460                 common->rx_irq_disabled = false;
 461                 enable_irq(common->rx_chns.irq);
 462         }
 463
 464         dev_dbg(common->dev, "cpsw_nuss started\n");
 465         return 0;
 466 }
 467
 468 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma);
 469 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma);
 470
 471 static int am65_cpsw_nuss_common_stop(struct am65_cpsw_common *common)
 472 {
 473         int i;
 474
 475         if (common->usage_count != 1)
 476                 return 0;
 477
 478         cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
 479                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 480
 481         /* shutdown tx channels */
 482         atomic_set(&common->tdown_cnt, common->tx_ch_num);
 483         /* ensure new tdown_cnt value is visible */
 484         smp_mb__after_atomic();
 485         reinit_completion(&common->tdown_complete);
 486
 487         for (i = 0; i < common->tx_ch_num; i++)
 488                 k3_udma_glue_tdown_tx_chn(common->tx_chns[i].tx_chn, false);
 489
 490         i = wait_for_completion_timeout(&common->tdown_complete,
 491                                         msecs_to_jiffies(1000));
 492         if (!i)
 493                 dev_err(common->dev, "tx timeout\n");
 494         for (i = 0; i < common->tx_ch_num; i++)
 495                 napi_disable(&common->tx_chns[i].napi_tx);
 496
 497         for (i = 0; i < common->tx_ch_num; i++) {
 498                 k3_udma_glue_reset_tx_chn(common->tx_chns[i].tx_chn,
 499                                           &common->tx_chns[i],
 500                                           am65_cpsw_nuss_tx_cleanup);
 501                 k3_udma_glue_disable_tx_chn(common->tx_chns[i].tx_chn);
 502         }
 503
 504         k3_udma_glue_tdown_rx_chn(common->rx_chns.rx_chn, true);
 505         napi_disable(&common->napi_rx);
 506
 507         for (i = 0; i < AM65_CPSW_MAX_RX_FLOWS; i++)
 508                 k3_udma_glue_reset_rx_chn(common->rx_chns.rx_chn, i,
 509                                           &common->rx_chns,
 510                                           am65_cpsw_nuss_rx_cleanup, !!i);
 511
 512         k3_udma_glue_disable_rx_chn(common->rx_chns.rx_chn);
 513
 514         cpsw_ale_stop(common->ale);
 515
 516         writel(0, common->cpsw_base + AM65_CPSW_REG_CTL);
 517         writel(0, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
 518
 519         dev_dbg(common->dev, "cpsw_nuss stopped\n");
 520         return 0;
 521 }
 522
 523 static int am65_cpsw_nuss_ndo_slave_stop(struct net_device *ndev)
 524 {
 525         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 526         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 527         int ret;
 528
 529         phylink_stop(port->slave.phylink);
 530
 531         netif_tx_stop_all_queues(ndev);
 532
 533         phylink_disconnect_phy(port->slave.phylink);
 534
 535         ret = am65_cpsw_nuss_common_stop(common);
 536         if (ret)
 537                 return ret;
 538
 539         common->usage_count--;
 540         pm_runtime_put(common->dev);
 541         return 0;
 542 }
 543
 544 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
 545 {
 546         struct am65_cpsw_port *port = arg;
 547
 548         if (!vdev)
 549                 return 0;
 550
 551         return am65_cpsw_nuss_ndo_slave_add_vid(port->ndev, 0, vid);
 552 }
 553
 554 static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
 555 {
 556         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
 557         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
 558         int ret, i;
 559         u32 reg;
 560
 561         ret = pm_runtime_resume_and_get(common->dev);
 562         if (ret < 0)
 563                 return ret;
 564
 565         /* Idle MAC port */
 566         cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
 567         cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
 568         cpsw_sl_ctl_reset(port->slave.mac_sl);
 569
 570         /* soft reset MAC */
 571         cpsw_sl_reg_write(port->slave.mac_sl, CPSW_SL_SOFT_RESET, 1);
 572         mdelay(1);
 573         reg = cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_SOFT_RESET);
 574         if (reg) {
 575                 dev_err(common->dev, "soft RESET didn't complete\n");
 576                 ret = -ETIMEDOUT;
 577                 goto runtime_put;
 578         }
 579
 580         /* Notify the stack of the actual queue counts. */
 581         ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num);
 582         if (ret) {
 583                 dev_err(common->dev, "cannot set real number of tx queues\n");
 584                 goto runtime_put;
 585         }
 586
 587         ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES);
 588         if (ret) {
 589                 dev_err(common->dev, "cannot set real number of rx queues\n");
 590                 goto runtime_put;
 591         }
 592
 593         for (i = 0; i < common->tx_ch_num; i++)
 594                 netdev_tx_reset_queue(netdev_get_tx_queue(ndev, i));
 595
 596         ret = am65_cpsw_nuss_common_open(common);
 597         if (ret)
 598                 goto runtime_put;
 599
 600         common->usage_count++;
 601
 602         am65_cpsw_port_set_sl_mac(port, ndev->dev_addr);
 603
 604         if (common->is_emac_mode)
 605                 am65_cpsw_init_port_emac_ale(port);
 606         else
 607                 am65_cpsw_init_port_switch_ale(port);
 608
 609         /* mac_sl should be configured via phy-link interface */
 610         am65_cpsw_sl_ctl_reset(port);
 611
 612         ret = phylink_of_phy_connect(port->slave.phylink, port->slave.phy_node, 0);
 613         if (ret)
 614                 goto error_cleanup;
 615
 616         /* restore vlan configurations */
 617         vlan_for_each(ndev, cpsw_restore_vlans, port);
 618
 619         phylink_start(port->slave.phylink);
 620
 621         return 0;
 622
 623 error_cleanup:
 624         am65_cpsw_nuss_ndo_slave_stop(ndev);
 625         return ret;
 626
 627 runtime_put:
 628         pm_runtime_put(common->dev);
 629         return ret;
 630 }
 631
 632 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)
 633 {
 634         struct am65_cpsw_rx_chn *rx_chn = data;
 635         struct cppi5_host_desc_t *desc_rx;
 636         struct sk_buff *skb;
 637         dma_addr_t buf_dma;
 638         u32 buf_dma_len;
 639         void **swdata;
 640
 641         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 642         swdata = cppi5_hdesc_get_swdata(desc_rx);
 643         skb = *swdata;
 644         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 645         k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
 646
 647         dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 648         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 649
 650         dev_kfree_skb_any(skb);
 651 }
 652
 653 static void am65_cpsw_nuss_rx_ts(struct sk_buff *skb, u32 *psdata)
 654 {
 655         struct skb_shared_hwtstamps *ssh;
 656         u64 ns;
 657
 658         ns = ((u64)psdata[1] << 32) | psdata[0];
 659
 660         ssh = skb_hwtstamps(skb);
 661         memset(ssh, 0, sizeof(*ssh));
 662         ssh->hwtstamp = ns_to_ktime(ns);
 663 }
 664
 665 /* RX psdata[2] word format - checksum information */
 666 #define AM65_CPSW_RX_PSD_CSUM_ADD       GENMASK(15, 0)
 667 #define AM65_CPSW_RX_PSD_CSUM_ERR       BIT(16)
 668 #define AM65_CPSW_RX_PSD_IS_FRAGMENT    BIT(17)
 669 #define AM65_CPSW_RX_PSD_IS_TCP         BIT(18)
 670 #define AM65_CPSW_RX_PSD_IPV6_VALID     BIT(19)
 671 #define AM65_CPSW_RX_PSD_IPV4_VALID     BIT(20)
 672
 673 static void am65_cpsw_nuss_rx_csum(struct sk_buff *skb, u32 csum_info)
 674 {
 675         /* HW can verify IPv4/IPv6 TCP/UDP packets checksum
 676          * csum information provides in psdata[2] word:
 677          * AM65_CPSW_RX_PSD_CSUM_ERR bit - indicates csum error
 678          * AM65_CPSW_RX_PSD_IPV6_VALID and AM65_CPSW_RX_PSD_IPV4_VALID
 679          * bits - indicates IPv4/IPv6 packet
 680          * AM65_CPSW_RX_PSD_IS_FRAGMENT bit - indicates fragmented packet
 681          * AM65_CPSW_RX_PSD_CSUM_ADD has value 0xFFFF for non fragmented packets
 682          * or csum value for fragmented packets if !AM65_CPSW_RX_PSD_CSUM_ERR
 683          */
 684         skb_checksum_none_assert(skb);
 685
 686         if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM)))
 687                 return;
 688
 689         if ((csum_info & (AM65_CPSW_RX_PSD_IPV6_VALID |
 690                           AM65_CPSW_RX_PSD_IPV4_VALID)) &&
 691                           !(csum_info & AM65_CPSW_RX_PSD_CSUM_ERR)) {
 692                 /* csum for fragmented packets is unsupported */
 693                 if (!(csum_info & AM65_CPSW_RX_PSD_IS_FRAGMENT))
 694                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 695         }
 696 }
 697
 698 static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common,
 699                                      u32 flow_idx)
 700 {
 701         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
 702         u32 buf_dma_len, pkt_len, port_id = 0, csum_info;
 703         struct am65_cpsw_ndev_priv *ndev_priv;
 704         struct am65_cpsw_ndev_stats *stats;
 705         struct cppi5_host_desc_t *desc_rx;
 706         struct device *dev = common->dev;
 707         struct sk_buff *skb, *new_skb;
 708         dma_addr_t desc_dma, buf_dma;
 709         struct am65_cpsw_port *port;
 710         struct net_device *ndev;
 711         void **swdata;
 712         u32 *psdata;
 713         int ret = 0;
 714
 715         ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_idx, &desc_dma);
 716         if (ret) {
 717                 if (ret != -ENODATA)
 718                         dev_err(dev, "RX: pop chn fail %d\n", ret);
 719                 return ret;
 720         }
 721
 722         if (cppi5_desc_is_tdcm(desc_dma)) {
 723                 dev_dbg(dev, "%s RX tdown flow: %u\n", __func__, flow_idx);
 724                 return 0;
 725         }
 726
 727         desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
 728         dev_dbg(dev, "%s flow_idx: %u desc %pad\n",
 729                 __func__, flow_idx, &desc_dma);
 730
 731         swdata = cppi5_hdesc_get_swdata(desc_rx);
 732         skb = *swdata;
 733         cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 734         k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
 735         pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
 736         cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
 737         dev_dbg(dev, "%s rx port_id:%d\n", __func__, port_id);
 738         port = am65_common_get_port(common, port_id);
 739         ndev = port->ndev;
 740         skb->dev = ndev;
 741
 742         psdata = cppi5_hdesc_get_psdata(desc_rx);
 743         /* add RX timestamp */
 744         if (port->rx_ts_enabled)
 745                 am65_cpsw_nuss_rx_ts(skb, psdata);
 746         csum_info = psdata[2];
 747         dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info);
 748
 749         dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
 750
 751         k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
 752
 753         new_skb = netdev_alloc_skb_ip_align(ndev, AM65_CPSW_MAX_PACKET_SIZE);
 754         if (new_skb) {
 755                 ndev_priv = netdev_priv(ndev);
 756                 am65_cpsw_nuss_set_offload_fwd_mark(skb, ndev_priv->offload_fwd_mark);
 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                 stats = this_cpu_ptr(ndev_priv->stats);
 763
 764                 u64_stats_update_begin(&stats->syncp);
 765                 stats->rx_packets++;
 766                 stats->rx_bytes += pkt_len;
 767                 u64_stats_update_end(&stats->syncp);
 768                 kmemleak_not_leak(new_skb);
 769         } else {
 770                 ndev->stats.rx_dropped++;
 771                 new_skb = skb;
 772         }
 773
 774         if (netif_dormant(ndev)) {
 775                 dev_kfree_skb_any(new_skb);
 776                 ndev->stats.rx_dropped++;
 777                 return 0;
 778         }
 779
 780         ret = am65_cpsw_nuss_rx_push(common, new_skb);
 781         if (WARN_ON(ret < 0)) {
 782                 dev_kfree_skb_any(new_skb);
 783                 ndev->stats.rx_errors++;
 784                 ndev->stats.rx_dropped++;
 785         }
 786
 787         return ret;
 788 }
 789
 790 static int am65_cpsw_nuss_rx_poll(struct napi_struct *napi_rx, int budget)
 791 {
 792         struct am65_cpsw_common *common = am65_cpsw_napi_to_common(napi_rx);
 793         int flow = AM65_CPSW_MAX_RX_FLOWS;
 794         int cur_budget, ret;
 795         int num_rx = 0;
 796
 797         /* process every flow */
 798         while (flow--) {
 799                 cur_budget = budget - num_rx;
 800
 801                 while (cur_budget--) {
 802                         ret = am65_cpsw_nuss_rx_packets(common, flow);
 803                         if (ret)
 804                                 break;
 805                         num_rx++;
 806                 }
 807
 808                 if (num_rx >= budget)
 809                         break;
 810         }
 811
 812         dev_dbg(common->dev, "%s num_rx:%d %d\n", __func__, num_rx, budget);
 813
 814         if (num_rx < budget && napi_complete_done(napi_rx, num_rx)) {
 815                 if (common->rx_irq_disabled) {
 816                         common->rx_irq_disabled = false;
 817                         enable_irq(common->rx_chns.irq);
 818                 }
 819         }
 820
 821         return num_rx;
 822 }
 823
 824 static void am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn *tx_chn,
 825                                      struct cppi5_host_desc_t *desc)
 826 {
 827         struct cppi5_host_desc_t *first_desc, *next_desc;
 828         dma_addr_t buf_dma, next_desc_dma;
 829         u32 buf_dma_len;
 830
 831         first_desc = desc;
 832         next_desc = first_desc;
 833
 834         cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
 835         k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
 836
 837         dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE);
 838
 839         next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
 840         k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
 841         while (next_desc_dma) {
 842                 next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 843                                                        next_desc_dma);
 844                 cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
 845                 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
 846
 847                 dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len,
 848                                DMA_TO_DEVICE);
 849
 850                 next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
 851                 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
 852
 853                 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
 854         }
 855
 856         k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
 857 }
 858
 859 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma)
 860 {
 861         struct am65_cpsw_tx_chn *tx_chn = data;
 862         struct cppi5_host_desc_t *desc_tx;
 863         struct sk_buff *skb;
 864         void **swdata;
 865
 866         desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
 867         swdata = cppi5_hdesc_get_swdata(desc_tx);
 868         skb = *(swdata);
 869         am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 870
 871         dev_kfree_skb_any(skb);
 872 }
 873
 874 static struct sk_buff *
 875 am65_cpsw_nuss_tx_compl_packet(struct am65_cpsw_tx_chn *tx_chn,
 876                                dma_addr_t desc_dma)
 877 {
 878         struct am65_cpsw_ndev_priv *ndev_priv;
 879         struct am65_cpsw_ndev_stats *stats;
 880         struct cppi5_host_desc_t *desc_tx;
 881         struct net_device *ndev;
 882         struct sk_buff *skb;
 883         void **swdata;
 884
 885         desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
 886                                              desc_dma);
 887         swdata = cppi5_hdesc_get_swdata(desc_tx);
 888         skb = *(swdata);
 889         am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
 890
 891         ndev = skb->dev;
 892
 893         am65_cpts_tx_timestamp(tx_chn->common->cpts, skb);
 894
 895         ndev_priv = netdev_priv(ndev);
 896         stats = this_cpu_ptr(ndev_priv->stats);
 897         u64_stats_update_begin(&stats->syncp);
 898         stats->tx_packets++;
 899         stats->tx_bytes += skb->len;
 900         u64_stats_update_end(&stats->syncp);
 901
 902         return skb;
 903 }
 904
 905 static void am65_cpsw_nuss_tx_wake(struct am65_cpsw_tx_chn *tx_chn, struct net_device *ndev,
 906                                    struct netdev_queue *netif_txq)
 907 {
 908         if (netif_tx_queue_stopped(netif_txq)) {
 909                 /* Check whether the queue is stopped due to stalled
 910                  * tx dma, if the queue is stopped then wake the queue
 911                  * as we have free desc for tx
 912                  */
 913                 __netif_tx_lock(netif_txq, smp_processor_id());
 914                 if (netif_running(ndev) &&
 915                     (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS))
 916                         netif_tx_wake_queue(netif_txq);
 917
 918                 __netif_tx_unlock(netif_txq);
 919         }
 920 }
 921
 922 static int am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common *common,
 923                                            int chn, unsigned int budget)
 924 {
 925         struct device *dev = common->dev;
 926         struct am65_cpsw_tx_chn *tx_chn;
 927         struct netdev_queue *netif_txq;
 928         unsigned int total_bytes = 0;
 929         struct net_device *ndev;
 930         struct sk_buff *skb;
 931         dma_addr_t desc_dma;
 932         int res, num_tx = 0;
 933
 934         tx_chn = &common->tx_chns[chn];
 935
 936         while (true) {
 937                 spin_lock(&tx_chn->lock);
 938                 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
 939                 spin_unlock(&tx_chn->lock);
 940                 if (res == -ENODATA)
 941                         break;
 942
 943                 if (cppi5_desc_is_tdcm(desc_dma)) {
 944                         if (atomic_dec_and_test(&common->tdown_cnt))
 945                                 complete(&common->tdown_complete);
 946                         break;
 947                 }
 948
 949                 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
 950                 total_bytes = skb->len;
 951                 ndev = skb->dev;
 952                 napi_consume_skb(skb, budget);
 953                 num_tx++;
 954
 955                 netif_txq = netdev_get_tx_queue(ndev, chn);
 956
 957                 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
 958
 959                 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
 960         }
 961
 962         dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
 963
 964         return num_tx;
 965 }
 966
 967 static int am65_cpsw_nuss_tx_compl_packets_2g(struct am65_cpsw_common *common,
 968                                               int chn, unsigned int budget)
 969 {
 970         struct device *dev = common->dev;
 971         struct am65_cpsw_tx_chn *tx_chn;
 972         struct netdev_queue *netif_txq;
 973         unsigned int total_bytes = 0;
 974         struct net_device *ndev;
 975         struct sk_buff *skb;
 976         dma_addr_t desc_dma;
 977         int res, num_tx = 0;
 978
 979         tx_chn = &common->tx_chns[chn];
 980
 981         while (true) {
 982                 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
 983                 if (res == -ENODATA)
 984                         break;
 985
 986                 if (cppi5_desc_is_tdcm(desc_dma)) {
 987                         if (atomic_dec_and_test(&common->tdown_cnt))
 988                                 complete(&common->tdown_complete);
 989                         break;
 990                 }
 991
 992                 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
 993
 994                 ndev = skb->dev;
 995                 total_bytes += skb->len;
 996                 napi_consume_skb(skb, budget);
 997                 num_tx++;
 998         }
 999
1000         if (!num_tx)
1001                 return 0;
1002
1003         netif_txq = netdev_get_tx_queue(ndev, chn);
1004
1005         netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
1006
1007         am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
1008
1009         dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
1010
1011         return num_tx;
1012 }
1013
1014 static int am65_cpsw_nuss_tx_poll(struct napi_struct *napi_tx, int budget)
1015 {
1016         struct am65_cpsw_tx_chn *tx_chn = am65_cpsw_napi_to_tx_chn(napi_tx);
1017         int num_tx;
1018
1019         if (AM65_CPSW_IS_CPSW2G(tx_chn->common))
1020                 num_tx = am65_cpsw_nuss_tx_compl_packets_2g(tx_chn->common, tx_chn->id, budget);
1021         else
1022                 num_tx = am65_cpsw_nuss_tx_compl_packets(tx_chn->common, tx_chn->id, budget);
1023
1024         if (num_tx >= budget)
1025                 return budget;
1026
1027         if (napi_complete_done(napi_tx, num_tx))
1028                 enable_irq(tx_chn->irq);
1029
1030         return 0;
1031 }
1032
1033 static irqreturn_t am65_cpsw_nuss_rx_irq(int irq, void *dev_id)
1034 {
1035         struct am65_cpsw_common *common = dev_id;
1036
1037         common->rx_irq_disabled = true;
1038         disable_irq_nosync(irq);
1039         napi_schedule(&common->napi_rx);
1040
1041         return IRQ_HANDLED;
1042 }
1043
1044 static irqreturn_t am65_cpsw_nuss_tx_irq(int irq, void *dev_id)
1045 {
1046         struct am65_cpsw_tx_chn *tx_chn = dev_id;
1047
1048         disable_irq_nosync(irq);
1049         napi_schedule(&tx_chn->napi_tx);
1050
1051         return IRQ_HANDLED;
1052 }
1053
1054 static netdev_tx_t am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff *skb,
1055                                                  struct net_device *ndev)
1056 {
1057         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1058         struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
1059         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1060         struct device *dev = common->dev;
1061         struct am65_cpsw_tx_chn *tx_chn;
1062         struct netdev_queue *netif_txq;
1063         dma_addr_t desc_dma, buf_dma;
1064         int ret, q_idx, i;
1065         void **swdata;
1066         u32 *psdata;
1067         u32 pkt_len;
1068
1069         /* padding enabled in hw */
1070         pkt_len = skb_headlen(skb);
1071
1072         /* SKB TX timestamp */
1073         if (port->tx_ts_enabled)
1074                 am65_cpts_prep_tx_timestamp(common->cpts, skb);
1075
1076         q_idx = skb_get_queue_mapping(skb);
1077         dev_dbg(dev, "%s skb_queue:%d\n", __func__, q_idx);
1078
1079         tx_chn = &common->tx_chns[q_idx];
1080         netif_txq = netdev_get_tx_queue(ndev, q_idx);
1081
1082         /* Map the linear buffer */
1083         buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len,
1084                                  DMA_TO_DEVICE);
1085         if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1086                 dev_err(dev, "Failed to map tx skb buffer\n");
1087                 ndev->stats.tx_errors++;
1088                 goto err_free_skb;
1089         }
1090
1091         first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1092         if (!first_desc) {
1093                 dev_dbg(dev, "Failed to allocate descriptor\n");
1094                 dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len,
1095                                  DMA_TO_DEVICE);
1096                 goto busy_stop_q;
1097         }
1098
1099         cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
1100                          AM65_CPSW_NAV_PS_DATA_SIZE);
1101         cppi5_desc_set_pktids(&first_desc->hdr, 0, 0x3FFF);
1102         cppi5_hdesc_set_pkttype(first_desc, 0x7);
1103         cppi5_desc_set_tags_ids(&first_desc->hdr, 0, port->port_id);
1104
1105         k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1106         cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
1107         swdata = cppi5_hdesc_get_swdata(first_desc);
1108         *(swdata) = skb;
1109         psdata = cppi5_hdesc_get_psdata(first_desc);
1110
1111         /* HW csum offload if enabled */
1112         psdata[2] = 0;
1113         if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1114                 unsigned int cs_start, cs_offset;
1115
1116                 cs_start = skb_transport_offset(skb);
1117                 cs_offset = cs_start + skb->csum_offset;
1118                 /* HW numerates bytes starting from 1 */
1119                 psdata[2] = ((cs_offset + 1) << 24) |
1120                             ((cs_start + 1) << 16) | (skb->len - cs_start);
1121                 dev_dbg(dev, "%s tx psdata:%#x\n", __func__, psdata[2]);
1122         }
1123
1124         if (!skb_is_nonlinear(skb))
1125                 goto done_tx;
1126
1127         dev_dbg(dev, "fragmented SKB\n");
1128
1129         /* Handle the case where skb is fragmented in pages */
1130         cur_desc = first_desc;
1131         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1132                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1133                 u32 frag_size = skb_frag_size(frag);
1134
1135                 next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1136                 if (!next_desc) {
1137                         dev_err(dev, "Failed to allocate descriptor\n");
1138                         goto busy_free_descs;
1139                 }
1140
1141                 buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size,
1142                                            DMA_TO_DEVICE);
1143                 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1144                         dev_err(dev, "Failed to map tx skb page\n");
1145                         k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
1146                         ndev->stats.tx_errors++;
1147                         goto err_free_descs;
1148                 }
1149
1150                 cppi5_hdesc_reset_hbdesc(next_desc);
1151                 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1152                 cppi5_hdesc_attach_buf(next_desc,
1153                                        buf_dma, frag_size, buf_dma, frag_size);
1154
1155                 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
1156                                                       next_desc);
1157                 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma);
1158                 cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
1159
1160                 pkt_len += frag_size;
1161                 cur_desc = next_desc;
1162         }
1163         WARN_ON(pkt_len != skb->len);
1164
1165 done_tx:
1166         skb_tx_timestamp(skb);
1167
1168         /* report bql before sending packet */
1169         netdev_tx_sent_queue(netif_txq, pkt_len);
1170
1171         cppi5_hdesc_set_pktlen(first_desc, pkt_len);
1172         desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
1173         if (AM65_CPSW_IS_CPSW2G(common)) {
1174                 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1175         } else {
1176                 spin_lock_bh(&tx_chn->lock);
1177                 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1178                 spin_unlock_bh(&tx_chn->lock);
1179         }
1180         if (ret) {
1181                 dev_err(dev, "can't push desc %d\n", ret);
1182                 /* inform bql */
1183                 netdev_tx_completed_queue(netif_txq, 1, pkt_len);
1184                 ndev->stats.tx_errors++;
1185                 goto err_free_descs;
1186         }
1187
1188         if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
1189                 netif_tx_stop_queue(netif_txq);
1190                 /* Barrier, so that stop_queue visible to other cpus */
1191                 smp_mb__after_atomic();
1192                 dev_dbg(dev, "netif_tx_stop_queue %d\n", q_idx);
1193
1194                 /* re-check for smp */
1195                 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
1196                     MAX_SKB_FRAGS) {
1197                         netif_tx_wake_queue(netif_txq);
1198                         dev_dbg(dev, "netif_tx_wake_queue %d\n", q_idx);
1199                 }
1200         }
1201
1202         return NETDEV_TX_OK;
1203
1204 err_free_descs:
1205         am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1206 err_free_skb:
1207         ndev->stats.tx_dropped++;
1208         dev_kfree_skb_any(skb);
1209         return NETDEV_TX_OK;
1210
1211 busy_free_descs:
1212         am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1213 busy_stop_q:
1214         netif_tx_stop_queue(netif_txq);
1215         return NETDEV_TX_BUSY;
1216 }
1217
1218 static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev,
1219                                                     void *addr)
1220 {
1221         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1222         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1223         struct sockaddr *sockaddr = (struct sockaddr *)addr;
1224         int ret;
1225
1226         ret = eth_prepare_mac_addr_change(ndev, addr);
1227         if (ret < 0)
1228                 return ret;
1229
1230         ret = pm_runtime_resume_and_get(common->dev);
1231         if (ret < 0)
1232                 return ret;
1233
1234         cpsw_ale_del_ucast(common->ale, ndev->dev_addr,
1235                            HOST_PORT_NUM, 0, 0);
1236         cpsw_ale_add_ucast(common->ale, sockaddr->sa_data,
1237                            HOST_PORT_NUM, ALE_SECURE, 0);
1238
1239         am65_cpsw_port_set_sl_mac(port, addr);
1240         eth_commit_mac_addr_change(ndev, sockaddr);
1241
1242         pm_runtime_put(common->dev);
1243
1244         return 0;
1245 }
1246
1247 static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev,
1248                                        struct ifreq *ifr)
1249 {
1250         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1251         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1252         u32 ts_ctrl, seq_id, ts_ctrl_ltype2, ts_vlan_ltype;
1253         struct hwtstamp_config cfg;
1254
1255         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1256                 return -EOPNOTSUPP;
1257
1258         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1259                 return -EFAULT;
1260
1261         /* TX HW timestamp */
1262         switch (cfg.tx_type) {
1263         case HWTSTAMP_TX_OFF:
1264         case HWTSTAMP_TX_ON:
1265                 break;
1266         default:
1267                 return -ERANGE;
1268         }
1269
1270         switch (cfg.rx_filter) {
1271         case HWTSTAMP_FILTER_NONE:
1272                 port->rx_ts_enabled = false;
1273                 break;
1274         case HWTSTAMP_FILTER_ALL:
1275         case HWTSTAMP_FILTER_SOME:
1276         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1277         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1278         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1279         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1280         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1281         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1282         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1283         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1284         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1285         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1286         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1287         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1288         case HWTSTAMP_FILTER_NTP_ALL:
1289                 port->rx_ts_enabled = true;
1290                 cfg.rx_filter = HWTSTAMP_FILTER_ALL;
1291                 break;
1292         default:
1293                 return -ERANGE;
1294         }
1295
1296         port->tx_ts_enabled = (cfg.tx_type == HWTSTAMP_TX_ON);
1297
1298         /* cfg TX timestamp */
1299         seq_id = (AM65_CPSW_TS_SEQ_ID_OFFSET <<
1300                   AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT) | ETH_P_1588;
1301
1302         ts_vlan_ltype = ETH_P_8021Q;
1303
1304         ts_ctrl_ltype2 = ETH_P_1588 |
1305                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 |
1306                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 |
1307                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 |
1308                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 |
1309                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 |
1310                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 |
1311                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 |
1312                          AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO;
1313
1314         ts_ctrl = AM65_CPSW_TS_EVENT_MSG_TYPE_BITS <<
1315                   AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT;
1316
1317         if (port->tx_ts_enabled)
1318                 ts_ctrl |= AM65_CPSW_TS_TX_ANX_ALL_EN |
1319                            AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN;
1320
1321         writel(seq_id, port->port_base + AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG);
1322         writel(ts_vlan_ltype, port->port_base +
1323                AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG);
1324         writel(ts_ctrl_ltype2, port->port_base +
1325                AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2);
1326         writel(ts_ctrl, port->port_base + AM65_CPSW_PORTN_REG_TS_CTL);
1327
1328         /* en/dis RX timestamp */
1329         am65_cpts_rx_enable(common->cpts, port->rx_ts_enabled);
1330
1331         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1332 }
1333
1334 static int am65_cpsw_nuss_hwtstamp_get(struct net_device *ndev,
1335                                        struct ifreq *ifr)
1336 {
1337         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1338         struct hwtstamp_config cfg;
1339
1340         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1341                 return -EOPNOTSUPP;
1342
1343         cfg.flags = 0;
1344         cfg.tx_type = port->tx_ts_enabled ?
1345                       HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
1346         cfg.rx_filter = port->rx_ts_enabled ?
1347                         HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
1348
1349         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1350 }
1351
1352 static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev,
1353                                           struct ifreq *req, int cmd)
1354 {
1355         struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1356
1357         if (!netif_running(ndev))
1358                 return -EINVAL;
1359
1360         switch (cmd) {
1361         case SIOCSHWTSTAMP:
1362                 return am65_cpsw_nuss_hwtstamp_set(ndev, req);
1363         case SIOCGHWTSTAMP:
1364                 return am65_cpsw_nuss_hwtstamp_get(ndev, req);
1365         }
1366
1367         return phylink_mii_ioctl(port->slave.phylink, req, cmd);
1368 }
1369
1370 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev,
1371                                          struct rtnl_link_stats64 *stats)
1372 {
1373         struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev);
1374         unsigned int start;
1375         int cpu;
1376
1377         for_each_possible_cpu(cpu) {
1378                 struct am65_cpsw_ndev_stats *cpu_stats;
1379                 u64 rx_packets;
1380                 u64 rx_bytes;
1381                 u64 tx_packets;
1382                 u64 tx_bytes;
1383
1384                 cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu);
1385                 do {
1386                         start = u64_stats_fetch_begin(&cpu_stats->syncp);
1387                         rx_packets = cpu_stats->rx_packets;
1388                         rx_bytes   = cpu_stats->rx_bytes;
1389                         tx_packets = cpu_stats->tx_packets;
1390                         tx_bytes   = cpu_stats->tx_bytes;
1391                 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
1392
1393                 stats->rx_packets += rx_packets;
1394                 stats->rx_bytes   += rx_bytes;
1395                 stats->tx_packets += tx_packets;
1396                 stats->tx_bytes   += tx_bytes;
1397         }
1398
1399         stats->rx_errors        = dev->stats.rx_errors;
1400         stats->rx_dropped       = dev->stats.rx_dropped;
1401         stats->tx_dropped       = dev->stats.tx_dropped;
1402 }
1403
1404 static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
1405         .ndo_open               = am65_cpsw_nuss_ndo_slave_open,
1406         .ndo_stop               = am65_cpsw_nuss_ndo_slave_stop,
1407         .ndo_start_xmit         = am65_cpsw_nuss_ndo_slave_xmit,
1408         .ndo_set_rx_mode        = am65_cpsw_nuss_ndo_slave_set_rx_mode,
1409         .ndo_get_stats64        = am65_cpsw_nuss_ndo_get_stats,
1410         .ndo_validate_addr      = eth_validate_addr,
1411         .ndo_set_mac_address    = am65_cpsw_nuss_ndo_slave_set_mac_address,
1412         .ndo_tx_timeout         = am65_cpsw_nuss_ndo_host_tx_timeout,
1413         .ndo_vlan_rx_add_vid    = am65_cpsw_nuss_ndo_slave_add_vid,
1414         .ndo_vlan_rx_kill_vid   = am65_cpsw_nuss_ndo_slave_kill_vid,
1415         .ndo_eth_ioctl          = am65_cpsw_nuss_ndo_slave_ioctl,
1416         .ndo_setup_tc           = am65_cpsw_qos_ndo_setup_tc,
1417 };
1418
1419 static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode,
1420                                       const struct phylink_link_state *state)
1421 {
1422         struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1423                                                           phylink_config);
1424         struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1425         struct am65_cpsw_common *common = port->common;
1426
1427         if (common->pdata.extra_modes & BIT(state->interface))
1428                 writel(AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE,
1429                        port->sgmii_base + AM65_CPSW_SGMII_CONTROL_REG);
1430 }
1431
1432 static void am65_cpsw_nuss_mac_link_down(struct phylink_config *config, unsigned int mode,
1433                                          phy_interface_t interface)
1434 {
1435         struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1436                                                           phylink_config);
1437         struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1438         struct am65_cpsw_common *common = port->common;
1439         struct net_device *ndev = port->ndev;
1440         int tmo;
1441
1442         /* disable forwarding */
1443         cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1444
1445         cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
1446
1447         tmo = cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
1448         dev_dbg(common->dev, "down msc_sl %08x tmo %d\n",
1449                 cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_MACSTATUS), tmo);
1450
1451         cpsw_sl_ctl_reset(port->slave.mac_sl);
1452
1453         am65_cpsw_qos_link_down(ndev);
1454         netif_tx_stop_all_queues(ndev);
1455 }
1456
1457 static void am65_cpsw_nuss_mac_link_up(struct phylink_config *config, struct phy_device *phy,
1458                                        unsigned int mode, phy_interface_t interface, int speed,
1459                                        int duplex, bool tx_pause, bool rx_pause)
1460 {
1461         struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1462                                                           phylink_config);
1463         struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1464         struct am65_cpsw_common *common = port->common;
1465         u32 mac_control = CPSW_SL_CTL_GMII_EN;
1466         struct net_device *ndev = port->ndev;
1467
1468         if (speed == SPEED_1000)
1469                 mac_control |= CPSW_SL_CTL_GIG;
1470         if (speed == SPEED_10 && phy_interface_mode_is_rgmii(interface))
1471                 /* Can be used with in band mode only */
1472                 mac_control |= CPSW_SL_CTL_EXT_EN;
1473         if (speed == SPEED_100 && interface == PHY_INTERFACE_MODE_RMII)
1474                 mac_control |= CPSW_SL_CTL_IFCTL_A;
1475         if (duplex)
1476                 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
1477
1478         /* rx_pause/tx_pause */
1479         if (rx_pause)
1480                 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
1481
1482         if (tx_pause)
1483                 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
1484
1485         cpsw_sl_ctl_set(port->slave.mac_sl, mac_control);
1486
1487         /* enable forwarding */
1488         cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
1489
1490         am65_cpsw_qos_link_up(ndev, speed);
1491         netif_tx_wake_all_queues(ndev);
1492 }
1493
1494 static const struct phylink_mac_ops am65_cpsw_phylink_mac_ops = {
1495         .mac_config = am65_cpsw_nuss_mac_config,
1496         .mac_link_down = am65_cpsw_nuss_mac_link_down,
1497         .mac_link_up = am65_cpsw_nuss_mac_link_up,
1498 };
1499
1500 static void am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port *port)
1501 {
1502         struct am65_cpsw_common *common = port->common;
1503
1504         if (!port->disabled)
1505                 return;
1506
1507         cpsw_ale_control_set(common->ale, port->port_id,
1508                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1509
1510         cpsw_sl_reset(port->slave.mac_sl, 100);
1511         cpsw_sl_ctl_reset(port->slave.mac_sl);
1512 }
1513
1514 static void am65_cpsw_nuss_free_tx_chns(void *data)
1515 {
1516         struct am65_cpsw_common *common = data;
1517         int i;
1518
1519         for (i = 0; i < common->tx_ch_num; i++) {
1520                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1521
1522                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1523                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1524
1525                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1526                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1527
1528                 memset(tx_chn, 0, sizeof(*tx_chn));
1529         }
1530 }
1531
1532 void am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common *common)
1533 {
1534         struct device *dev = common->dev;
1535         int i;
1536
1537         devm_remove_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1538
1539         for (i = 0; i < common->tx_ch_num; i++) {
1540                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1541
1542                 if (tx_chn->irq)
1543                         devm_free_irq(dev, tx_chn->irq, tx_chn);
1544
1545                 netif_napi_del(&tx_chn->napi_tx);
1546
1547                 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1548                         k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1549
1550                 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1551                         k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1552
1553                 memset(tx_chn, 0, sizeof(*tx_chn));
1554         }
1555 }
1556
1557 static int am65_cpsw_nuss_ndev_add_tx_napi(struct am65_cpsw_common *common)
1558 {
1559         struct device *dev = common->dev;
1560         int i, ret = 0;
1561
1562         for (i = 0; i < common->tx_ch_num; i++) {
1563                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1564
1565                 netif_napi_add_tx(common->dma_ndev, &tx_chn->napi_tx,
1566                                   am65_cpsw_nuss_tx_poll);
1567
1568                 ret = devm_request_irq(dev, tx_chn->irq,
1569                                        am65_cpsw_nuss_tx_irq,
1570                                        IRQF_TRIGGER_HIGH,
1571                                        tx_chn->tx_chn_name, tx_chn);
1572                 if (ret) {
1573                         dev_err(dev, "failure requesting tx%u irq %u, %d\n",
1574                                 tx_chn->id, tx_chn->irq, ret);
1575                         goto err;
1576                 }
1577         }
1578
1579 err:
1580         return ret;
1581 }
1582
1583 static int am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common *common)
1584 {
1585         u32  max_desc_num = ALIGN(AM65_CPSW_MAX_TX_DESC, MAX_SKB_FRAGS);
1586         struct k3_udma_glue_tx_channel_cfg tx_cfg = { 0 };
1587         struct device *dev = common->dev;
1588         struct k3_ring_cfg ring_cfg = {
1589                 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1590                 .mode = K3_RINGACC_RING_MODE_RING,
1591                 .flags = 0
1592         };
1593         u32 hdesc_size;
1594         int i, ret = 0;
1595
1596         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1597                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1598
1599         tx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1600         tx_cfg.tx_cfg = ring_cfg;
1601         tx_cfg.txcq_cfg = ring_cfg;
1602         tx_cfg.tx_cfg.size = max_desc_num;
1603         tx_cfg.txcq_cfg.size = max_desc_num;
1604
1605         for (i = 0; i < common->tx_ch_num; i++) {
1606                 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1607
1608                 snprintf(tx_chn->tx_chn_name,
1609                          sizeof(tx_chn->tx_chn_name), "tx%d", i);
1610
1611                 spin_lock_init(&tx_chn->lock);
1612                 tx_chn->common = common;
1613                 tx_chn->id = i;
1614                 tx_chn->descs_num = max_desc_num;
1615
1616                 tx_chn->tx_chn =
1617                         k3_udma_glue_request_tx_chn(dev,
1618                                                     tx_chn->tx_chn_name,
1619                                                     &tx_cfg);
1620                 if (IS_ERR(tx_chn->tx_chn)) {
1621                         ret = dev_err_probe(dev, PTR_ERR(tx_chn->tx_chn),
1622                                             "Failed to request tx dma channel\n");
1623                         goto err;
1624                 }
1625                 tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn);
1626
1627                 tx_chn->desc_pool = k3_cppi_desc_pool_create_name(tx_chn->dma_dev,
1628                                                                   tx_chn->descs_num,
1629                                                                   hdesc_size,
1630                                                                   tx_chn->tx_chn_name);
1631                 if (IS_ERR(tx_chn->desc_pool)) {
1632                         ret = PTR_ERR(tx_chn->desc_pool);
1633                         dev_err(dev, "Failed to create poll %d\n", ret);
1634                         goto err;
1635                 }
1636
1637                 tx_chn->irq = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
1638                 if (tx_chn->irq <= 0) {
1639                         dev_err(dev, "Failed to get tx dma irq %d\n",
1640                                 tx_chn->irq);
1641                         goto err;
1642                 }
1643
1644                 snprintf(tx_chn->tx_chn_name,
1645                          sizeof(tx_chn->tx_chn_name), "%s-tx%d",
1646                          dev_name(dev), tx_chn->id);
1647         }
1648
1649         ret = am65_cpsw_nuss_ndev_add_tx_napi(common);
1650         if (ret) {
1651                 dev_err(dev, "Failed to add tx NAPI %d\n", ret);
1652                 goto err;
1653         }
1654
1655 err:
1656         i = devm_add_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1657         if (i) {
1658                 dev_err(dev, "Failed to add free_tx_chns action %d\n", i);
1659                 return i;
1660         }
1661
1662         return ret;
1663 }
1664
1665 static void am65_cpsw_nuss_free_rx_chns(void *data)
1666 {
1667         struct am65_cpsw_common *common = data;
1668         struct am65_cpsw_rx_chn *rx_chn;
1669
1670         rx_chn = &common->rx_chns;
1671
1672         if (!IS_ERR_OR_NULL(rx_chn->desc_pool))
1673                 k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
1674
1675         if (!IS_ERR_OR_NULL(rx_chn->rx_chn))
1676                 k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
1677 }
1678
1679 static void am65_cpsw_nuss_remove_rx_chns(void *data)
1680 {
1681         struct am65_cpsw_common *common = data;
1682         struct am65_cpsw_rx_chn *rx_chn;
1683         struct device *dev = common->dev;
1684
1685         rx_chn = &common->rx_chns;
1686         devm_remove_action(dev, am65_cpsw_nuss_free_rx_chns, common);
1687
1688         if (!(rx_chn->irq < 0))
1689                 devm_free_irq(dev, rx_chn->irq, common);
1690
1691         netif_napi_del(&common->napi_rx);
1692
1693         if (!IS_ERR_OR_NULL(rx_chn->desc_pool))
1694                 k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
1695
1696         if (!IS_ERR_OR_NULL(rx_chn->rx_chn))
1697                 k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
1698
1699         common->rx_flow_id_base = -1;
1700 }
1701
1702 static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
1703 {
1704         struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
1705         struct k3_udma_glue_rx_channel_cfg rx_cfg = { 0 };
1706         u32  max_desc_num = AM65_CPSW_MAX_RX_DESC;
1707         struct device *dev = common->dev;
1708         u32 hdesc_size;
1709         u32 fdqring_id;
1710         int i, ret = 0;
1711
1712         hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1713                                            AM65_CPSW_NAV_SW_DATA_SIZE);
1714
1715         rx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1716         rx_cfg.flow_id_num = AM65_CPSW_MAX_RX_FLOWS;
1717         rx_cfg.flow_id_base = common->rx_flow_id_base;
1718
1719         /* init all flows */
1720         rx_chn->dev = dev;
1721         rx_chn->descs_num = max_desc_num;
1722
1723         rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, "rx", &rx_cfg);
1724         if (IS_ERR(rx_chn->rx_chn)) {
1725                 ret = dev_err_probe(dev, PTR_ERR(rx_chn->rx_chn),
1726                                     "Failed to request rx dma channel\n");
1727                 goto err;
1728         }
1729         rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn);
1730
1731         rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev,
1732                                                           rx_chn->descs_num,
1733                                                           hdesc_size, "rx");
1734         if (IS_ERR(rx_chn->desc_pool)) {
1735                 ret = PTR_ERR(rx_chn->desc_pool);
1736                 dev_err(dev, "Failed to create rx poll %d\n", ret);
1737                 goto err;
1738         }
1739
1740         common->rx_flow_id_base =
1741                         k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
1742         dev_info(dev, "set new flow-id-base %u\n", common->rx_flow_id_base);
1743
1744         fdqring_id = K3_RINGACC_RING_ID_ANY;
1745         for (i = 0; i < rx_cfg.flow_id_num; i++) {
1746                 struct k3_ring_cfg rxring_cfg = {
1747                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1748                         .mode = K3_RINGACC_RING_MODE_RING,
1749                         .flags = 0,
1750                 };
1751                 struct k3_ring_cfg fdqring_cfg = {
1752                         .elm_size = K3_RINGACC_RING_ELSIZE_8,
1753                         .flags = K3_RINGACC_RING_SHARED,
1754                 };
1755                 struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
1756                         .rx_cfg = rxring_cfg,
1757                         .rxfdq_cfg = fdqring_cfg,
1758                         .ring_rxq_id = K3_RINGACC_RING_ID_ANY,
1759                         .src_tag_lo_sel =
1760                                 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
1761                 };
1762
1763                 rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
1764                 rx_flow_cfg.rx_cfg.size = max_desc_num;
1765                 rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
1766                 rx_flow_cfg.rxfdq_cfg.mode = common->pdata.fdqring_mode;
1767
1768                 ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
1769                                                 i, &rx_flow_cfg);
1770                 if (ret) {
1771                         dev_err(dev, "Failed to init rx flow%d %d\n", i, ret);
1772                         goto err;
1773                 }
1774                 if (!i)
1775                         fdqring_id =
1776                                 k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
1777                                                                 i);
1778
1779                 rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
1780
1781                 if (rx_chn->irq <= 0) {
1782                         dev_err(dev, "Failed to get rx dma irq %d\n",
1783                                 rx_chn->irq);
1784                         ret = -ENXIO;
1785                         goto err;
1786                 }
1787         }
1788
1789         netif_napi_add(common->dma_ndev, &common->napi_rx,
1790                        am65_cpsw_nuss_rx_poll);
1791
1792         ret = devm_request_irq(dev, rx_chn->irq,
1793                                am65_cpsw_nuss_rx_irq,
1794                                IRQF_TRIGGER_HIGH, dev_name(dev), common);
1795         if (ret) {
1796                 dev_err(dev, "failure requesting rx irq %u, %d\n",
1797                         rx_chn->irq, ret);
1798                 goto err;
1799         }
1800
1801 err:
1802         i = devm_add_action(dev, am65_cpsw_nuss_free_rx_chns, common);
1803         if (i) {
1804                 dev_err(dev, "Failed to add free_rx_chns action %d\n", i);
1805                 return i;
1806         }
1807
1808         return ret;
1809 }
1810
1811 static int am65_cpsw_nuss_init_host_p(struct am65_cpsw_common *common)
1812 {
1813         struct am65_cpsw_host *host_p = am65_common_get_host(common);
1814
1815         host_p->common = common;
1816         host_p->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE;
1817         host_p->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE;
1818
1819         return 0;
1820 }
1821
1822 static int am65_cpsw_am654_get_efuse_macid(struct device_node *of_node,
1823                                            int slave, u8 *mac_addr)
1824 {
1825         u32 mac_lo, mac_hi, offset;
1826         struct regmap *syscon;
1827         int ret;
1828
1829         syscon = syscon_regmap_lookup_by_phandle(of_node, "ti,syscon-efuse");
1830         if (IS_ERR(syscon)) {
1831                 if (PTR_ERR(syscon) == -ENODEV)
1832                         return 0;
1833                 return PTR_ERR(syscon);
1834         }
1835
1836         ret = of_property_read_u32_index(of_node, "ti,syscon-efuse", 1,
1837                                          &offset);
1838         if (ret)
1839                 return ret;
1840
1841         regmap_read(syscon, offset, &mac_lo);
1842         regmap_read(syscon, offset + 4, &mac_hi);
1843
1844         mac_addr[0] = (mac_hi >> 8) & 0xff;
1845         mac_addr[1] = mac_hi & 0xff;
1846         mac_addr[2] = (mac_lo >> 24) & 0xff;
1847         mac_addr[3] = (mac_lo >> 16) & 0xff;
1848         mac_addr[4] = (mac_lo >> 8) & 0xff;
1849         mac_addr[5] = mac_lo & 0xff;
1850
1851         return 0;
1852 }
1853
1854 static int am65_cpsw_init_cpts(struct am65_cpsw_common *common)
1855 {
1856         struct device *dev = common->dev;
1857         struct device_node *node;
1858         struct am65_cpts *cpts;
1859         void __iomem *reg_base;
1860
1861         if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1862                 return 0;
1863
1864         node = of_get_child_by_name(dev->of_node, "cpts");
1865         if (!node) {
1866                 dev_err(dev, "%s cpts not found\n", __func__);
1867                 return -ENOENT;
1868         }
1869
1870         reg_base = common->cpsw_base + AM65_CPSW_NU_CPTS_BASE;
1871         cpts = am65_cpts_create(dev, reg_base, node);
1872         if (IS_ERR(cpts)) {
1873                 int ret = PTR_ERR(cpts);
1874
1875                 of_node_put(node);
1876                 if (ret == -EOPNOTSUPP) {
1877                         dev_info(dev, "cpts disabled\n");
1878                         return 0;
1879                 }
1880
1881                 dev_err(dev, "cpts create err %d\n", ret);
1882                 return ret;
1883         }
1884         common->cpts = cpts;
1885         /* Forbid PM runtime if CPTS is running.
1886          * K3 CPSWxG modules may completely lose context during ON->OFF
1887          * transitions depending on integration.
1888          * AM65x/J721E MCU CPSW2G: false
1889          * J721E MAIN_CPSW9G: true
1890          */
1891         pm_runtime_forbid(dev);
1892
1893         return 0;
1894 }
1895
1896 static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
1897 {
1898         struct device_node *node, *port_np;
1899         struct device *dev = common->dev;
1900         int ret;
1901
1902         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
1903         if (!node)
1904                 return -ENOENT;
1905
1906         for_each_child_of_node(node, port_np) {
1907                 struct am65_cpsw_port *port;
1908                 u32 port_id;
1909
1910                 /* it is not a slave port node, continue */
1911                 if (strcmp(port_np->name, "port"))
1912                         continue;
1913
1914                 ret = of_property_read_u32(port_np, "reg", &port_id);
1915                 if (ret < 0) {
1916                         dev_err(dev, "%pOF error reading port_id %d\n",
1917                                 port_np, ret);
1918                         goto of_node_put;
1919                 }
1920
1921                 if (!port_id || port_id > common->port_num) {
1922                         dev_err(dev, "%pOF has invalid port_id %u %s\n",
1923                                 port_np, port_id, port_np->name);
1924                         ret = -EINVAL;
1925                         goto of_node_put;
1926                 }
1927
1928                 port = am65_common_get_port(common, port_id);
1929                 port->port_id = port_id;
1930                 port->common = common;
1931                 port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE +
1932                                   AM65_CPSW_NU_PORTS_OFFSET * (port_id);
1933                 if (common->pdata.extra_modes)
1934                         port->sgmii_base = common->ss_base + AM65_CPSW_SGMII_BASE * (port_id);
1935                 port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE +
1936                                   (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id);
1937                 port->name = of_get_property(port_np, "label", NULL);
1938                 port->fetch_ram_base =
1939                                 common->cpsw_base + AM65_CPSW_NU_FRAM_BASE +
1940                                 (AM65_CPSW_NU_FRAM_PORT_OFFSET * (port_id - 1));
1941
1942                 port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base);
1943                 if (IS_ERR(port->slave.mac_sl)) {
1944                         ret = PTR_ERR(port->slave.mac_sl);
1945                         goto of_node_put;
1946                 }
1947
1948                 port->disabled = !of_device_is_available(port_np);
1949                 if (port->disabled) {
1950                         common->disabled_ports_mask |= BIT(port->port_id);
1951                         continue;
1952                 }
1953
1954                 port->slave.ifphy = devm_of_phy_get(dev, port_np, NULL);
1955                 if (IS_ERR(port->slave.ifphy)) {
1956                         ret = PTR_ERR(port->slave.ifphy);
1957                         dev_err(dev, "%pOF error retrieving port phy: %d\n",
1958                                 port_np, ret);
1959                         goto of_node_put;
1960                 }
1961
1962                 port->slave.mac_only =
1963                                 of_property_read_bool(port_np, "ti,mac-only");
1964
1965                 /* get phy/link info */
1966                 port->slave.phy_node = port_np;
1967                 ret = of_get_phy_mode(port_np, &port->slave.phy_if);
1968                 if (ret) {
1969                         dev_err(dev, "%pOF read phy-mode err %d\n",
1970                                 port_np, ret);
1971                         goto of_node_put;
1972                 }
1973
1974                 ret = phy_set_mode_ext(port->slave.ifphy, PHY_MODE_ETHERNET, port->slave.phy_if);
1975                 if (ret)
1976                         goto of_node_put;
1977
1978                 ret = of_get_mac_address(port_np, port->slave.mac_addr);
1979                 if (ret) {
1980                         am65_cpsw_am654_get_efuse_macid(port_np,
1981                                                         port->port_id,
1982                                                         port->slave.mac_addr);
1983                         if (!is_valid_ether_addr(port->slave.mac_addr)) {
1984                                 eth_random_addr(port->slave.mac_addr);
1985                                 dev_err(dev, "Use random MAC address\n");
1986                         }
1987                 }
1988         }
1989         of_node_put(node);
1990
1991         /* is there at least one ext.port */
1992         if (!(~common->disabled_ports_mask & GENMASK(common->port_num, 1))) {
1993                 dev_err(dev, "No Ext. port are available\n");
1994                 return -ENODEV;
1995         }
1996
1997         return 0;
1998
1999 of_node_put:
2000         of_node_put(port_np);
2001         of_node_put(node);
2002         return ret;
2003 }
2004
2005 static void am65_cpsw_pcpu_stats_free(void *data)
2006 {
2007         struct am65_cpsw_ndev_stats __percpu *stats = data;
2008
2009         free_percpu(stats);
2010 }
2011
2012 static void am65_cpsw_nuss_phylink_cleanup(struct am65_cpsw_common *common)
2013 {
2014         struct am65_cpsw_port *port;
2015         int i;
2016
2017         for (i = 0; i < common->port_num; i++) {
2018                 port = &common->ports[i];
2019                 if (port->slave.phylink)
2020                         phylink_destroy(port->slave.phylink);
2021         }
2022 }
2023
2024 static int
2025 am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
2026 {
2027         struct am65_cpsw_ndev_priv *ndev_priv;
2028         struct device *dev = common->dev;
2029         struct am65_cpsw_port *port;
2030         struct phylink *phylink;
2031         int ret;
2032
2033         port = &common->ports[port_idx];
2034
2035         if (port->disabled)
2036                 return 0;
2037
2038         /* alloc netdev */
2039         port->ndev = devm_alloc_etherdev_mqs(common->dev,
2040                                              sizeof(struct am65_cpsw_ndev_priv),
2041                                              AM65_CPSW_MAX_TX_QUEUES,
2042                                              AM65_CPSW_MAX_RX_QUEUES);
2043         if (!port->ndev) {
2044                 dev_err(dev, "error allocating slave net_device %u\n",
2045                         port->port_id);
2046                 return -ENOMEM;
2047         }
2048
2049         ndev_priv = netdev_priv(port->ndev);
2050         ndev_priv->port = port;
2051         ndev_priv->msg_enable = AM65_CPSW_DEBUG;
2052         SET_NETDEV_DEV(port->ndev, dev);
2053
2054         eth_hw_addr_set(port->ndev, port->slave.mac_addr);
2055
2056         port->ndev->min_mtu = AM65_CPSW_MIN_PACKET_SIZE;
2057         port->ndev->max_mtu = AM65_CPSW_MAX_PACKET_SIZE;
2058         port->ndev->hw_features = NETIF_F_SG |
2059                                   NETIF_F_RXCSUM |
2060                                   NETIF_F_HW_CSUM |
2061                                   NETIF_F_HW_TC;
2062         port->ndev->features = port->ndev->hw_features |
2063                                NETIF_F_HW_VLAN_CTAG_FILTER;
2064         port->ndev->vlan_features |=  NETIF_F_SG;
2065         port->ndev->netdev_ops = &am65_cpsw_nuss_netdev_ops;
2066         port->ndev->ethtool_ops = &am65_cpsw_ethtool_ops_slave;
2067
2068         /* Configuring Phylink */
2069         port->slave.phylink_config.dev = &port->ndev->dev;
2070         port->slave.phylink_config.type = PHYLINK_NETDEV;
2071         port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD;
2072         port->slave.phylink_config.mac_managed_pm = true; /* MAC does PM */
2073
2074         if (phy_interface_mode_is_rgmii(port->slave.phy_if)) {
2075                 phy_interface_set_rgmii(port->slave.phylink_config.supported_interfaces);
2076         } else if (port->slave.phy_if == PHY_INTERFACE_MODE_RMII) {
2077                 __set_bit(PHY_INTERFACE_MODE_RMII,
2078                           port->slave.phylink_config.supported_interfaces);
2079         } else if (common->pdata.extra_modes & BIT(port->slave.phy_if)) {
2080                 __set_bit(PHY_INTERFACE_MODE_QSGMII,
2081                           port->slave.phylink_config.supported_interfaces);
2082         } else {
2083                 dev_err(dev, "selected phy-mode is not supported\n");
2084                 return -EOPNOTSUPP;
2085         }
2086
2087         phylink = phylink_create(&port->slave.phylink_config,
2088                                  of_node_to_fwnode(port->slave.phy_node),
2089                                  port->slave.phy_if,
2090                                  &am65_cpsw_phylink_mac_ops);
2091         if (IS_ERR(phylink))
2092                 return PTR_ERR(phylink);
2093
2094         port->slave.phylink = phylink;
2095
2096         /* Disable TX checksum offload by default due to HW bug */
2097         if (common->pdata.quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM)
2098                 port->ndev->features &= ~NETIF_F_HW_CSUM;
2099
2100         ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats);
2101         if (!ndev_priv->stats)
2102                 return -ENOMEM;
2103
2104         ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free,
2105                                        ndev_priv->stats);
2106         if (ret)
2107                 dev_err(dev, "failed to add percpu stat free action %d\n", ret);
2108
2109         if (!common->dma_ndev)
2110                 common->dma_ndev = port->ndev;
2111
2112         return ret;
2113 }
2114
2115 static int am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common *common)
2116 {
2117         int ret;
2118         int i;
2119
2120         for (i = 0; i < common->port_num; i++) {
2121                 ret = am65_cpsw_nuss_init_port_ndev(common, i);
2122                 if (ret)
2123                         return ret;
2124         }
2125
2126         return ret;
2127 }
2128
2129 static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common)
2130 {
2131         struct am65_cpsw_port *port;
2132         int i;
2133
2134         for (i = 0; i < common->port_num; i++) {
2135                 port = &common->ports[i];
2136                 if (port->ndev && port->ndev->reg_state == NETREG_REGISTERED)
2137                         unregister_netdev(port->ndev);
2138         }
2139 }
2140
2141 static void am65_cpsw_port_offload_fwd_mark_update(struct am65_cpsw_common *common)
2142 {
2143         int set_val = 0;
2144         int i;
2145
2146         if (common->br_members == (GENMASK(common->port_num, 1) & ~common->disabled_ports_mask))
2147                 set_val = 1;
2148
2149         dev_dbg(common->dev, "set offload_fwd_mark %d\n", set_val);
2150
2151         for (i = 1; i <= common->port_num; i++) {
2152                 struct am65_cpsw_port *port = am65_common_get_port(common, i);
2153                 struct am65_cpsw_ndev_priv *priv;
2154
2155                 if (!port->ndev)
2156                         continue;
2157
2158                 priv = am65_ndev_to_priv(port->ndev);
2159                 priv->offload_fwd_mark = set_val;
2160         }
2161 }
2162
2163 bool am65_cpsw_port_dev_check(const struct net_device *ndev)
2164 {
2165         if (ndev->netdev_ops == &am65_cpsw_nuss_netdev_ops) {
2166                 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2167
2168                 return !common->is_emac_mode;
2169         }
2170
2171         return false;
2172 }
2173
2174 static int am65_cpsw_netdevice_port_link(struct net_device *ndev,
2175                                          struct net_device *br_ndev,
2176                                          struct netlink_ext_ack *extack)
2177 {
2178         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2179         struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2180         int err;
2181
2182         if (!common->br_members) {
2183                 common->hw_bridge_dev = br_ndev;
2184         } else {
2185                 /* This is adding the port to a second bridge, this is
2186                  * unsupported
2187                  */
2188                 if (common->hw_bridge_dev != br_ndev)
2189                         return -EOPNOTSUPP;
2190         }
2191
2192         err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
2193                                             false, extack);
2194         if (err)
2195                 return err;
2196
2197         common->br_members |= BIT(priv->port->port_id);
2198
2199         am65_cpsw_port_offload_fwd_mark_update(common);
2200
2201         return NOTIFY_DONE;
2202 }
2203
2204 static void am65_cpsw_netdevice_port_unlink(struct net_device *ndev)
2205 {
2206         struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2207         struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2208
2209         switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL);
2210
2211         common->br_members &= ~BIT(priv->port->port_id);
2212
2213         am65_cpsw_port_offload_fwd_mark_update(common);
2214
2215         if (!common->br_members)
2216                 common->hw_bridge_dev = NULL;
2217 }
2218
2219 /* netdev notifier */
2220 static int am65_cpsw_netdevice_event(struct notifier_block *unused,
2221                                      unsigned long event, void *ptr)
2222 {
2223         struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
2224         struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
2225         struct netdev_notifier_changeupper_info *info;
2226         int ret = NOTIFY_DONE;
2227
2228         if (!am65_cpsw_port_dev_check(ndev))
2229                 return NOTIFY_DONE;
2230
2231         switch (event) {
2232         case NETDEV_CHANGEUPPER:
2233                 info = ptr;
2234
2235                 if (netif_is_bridge_master(info->upper_dev)) {
2236                         if (info->linking)
2237                                 ret = am65_cpsw_netdevice_port_link(ndev,
2238                                                                     info->upper_dev,
2239                                                                     extack);
2240                         else
2241                                 am65_cpsw_netdevice_port_unlink(ndev);
2242                 }
2243                 break;
2244         default:
2245                 return NOTIFY_DONE;
2246         }
2247
2248         return notifier_from_errno(ret);
2249 }
2250
2251 static int am65_cpsw_register_notifiers(struct am65_cpsw_common *cpsw)
2252 {
2253         int ret = 0;
2254
2255         if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2256             !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2257                 return 0;
2258
2259         cpsw->am65_cpsw_netdevice_nb.notifier_call = &am65_cpsw_netdevice_event;
2260         ret = register_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2261         if (ret) {
2262                 dev_err(cpsw->dev, "can't register netdevice notifier\n");
2263                 return ret;
2264         }
2265
2266         ret = am65_cpsw_switchdev_register_notifiers(cpsw);
2267         if (ret)
2268                 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2269
2270         return ret;
2271 }
2272
2273 static void am65_cpsw_unregister_notifiers(struct am65_cpsw_common *cpsw)
2274 {
2275         if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2276             !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2277                 return;
2278
2279         am65_cpsw_switchdev_unregister_notifiers(cpsw);
2280         unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2281 }
2282
2283 static const struct devlink_ops am65_cpsw_devlink_ops = {};
2284
2285 static void am65_cpsw_init_stp_ale_entry(struct am65_cpsw_common *cpsw)
2286 {
2287         cpsw_ale_add_mcast(cpsw->ale, eth_stp_addr, ALE_PORT_HOST, ALE_SUPER, 0,
2288                            ALE_MCAST_BLOCK_LEARN_FWD);
2289 }
2290
2291 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common)
2292 {
2293         struct am65_cpsw_host *host = am65_common_get_host(common);
2294
2295         writel(common->default_vlan, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2296
2297         am65_cpsw_init_stp_ale_entry(common);
2298
2299         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
2300         dev_dbg(common->dev, "Set P0_UNI_FLOOD\n");
2301         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
2302 }
2303
2304 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common)
2305 {
2306         struct am65_cpsw_host *host = am65_common_get_host(common);
2307
2308         writel(0, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2309
2310         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
2311         dev_dbg(common->dev, "unset P0_UNI_FLOOD\n");
2312
2313         /* learning make no sense in multi-mac mode */
2314         cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
2315 }
2316
2317 static int am65_cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
2318                                         struct devlink_param_gset_ctx *ctx)
2319 {
2320         struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2321         struct am65_cpsw_common *common = dl_priv->common;
2322
2323         dev_dbg(common->dev, "%s id:%u\n", __func__, id);
2324
2325         if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2326                 return -EOPNOTSUPP;
2327
2328         ctx->val.vbool = !common->is_emac_mode;
2329
2330         return 0;
2331 }
2332
2333 static void am65_cpsw_init_port_emac_ale(struct  am65_cpsw_port *port)
2334 {
2335         struct am65_cpsw_slave_data *slave = &port->slave;
2336         struct am65_cpsw_common *common = port->common;
2337         u32 port_mask;
2338
2339         writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2340
2341         if (slave->mac_only)
2342                 /* enable mac-only mode on port */
2343                 cpsw_ale_control_set(common->ale, port->port_id,
2344                                      ALE_PORT_MACONLY, 1);
2345
2346         cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_NOLEARN, 1);
2347
2348         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2349
2350         cpsw_ale_add_ucast(common->ale, port->ndev->dev_addr,
2351                            HOST_PORT_NUM, ALE_SECURE, slave->port_vlan);
2352         cpsw_ale_add_mcast(common->ale, port->ndev->broadcast,
2353                            port_mask, ALE_VLAN, slave->port_vlan, ALE_MCAST_FWD_2);
2354 }
2355
2356 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port)
2357 {
2358         struct am65_cpsw_slave_data *slave = &port->slave;
2359         struct am65_cpsw_common *cpsw = port->common;
2360         u32 port_mask;
2361
2362         cpsw_ale_control_set(cpsw->ale, port->port_id,
2363                              ALE_PORT_NOLEARN, 0);
2364
2365         cpsw_ale_add_ucast(cpsw->ale, port->ndev->dev_addr,
2366                            HOST_PORT_NUM, ALE_SECURE | ALE_BLOCKED | ALE_VLAN,
2367                            slave->port_vlan);
2368
2369         port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2370
2371         cpsw_ale_add_mcast(cpsw->ale, port->ndev->broadcast,
2372                            port_mask, ALE_VLAN, slave->port_vlan,
2373                            ALE_MCAST_FWD_2);
2374
2375         writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2376
2377         cpsw_ale_control_set(cpsw->ale, port->port_id,
2378                              ALE_PORT_MACONLY, 0);
2379 }
2380
2381 static int am65_cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
2382                                         struct devlink_param_gset_ctx *ctx)
2383 {
2384         struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2385         struct am65_cpsw_common *cpsw = dl_priv->common;
2386         bool switch_en = ctx->val.vbool;
2387         bool if_running = false;
2388         int i;
2389
2390         dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
2391
2392         if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2393                 return -EOPNOTSUPP;
2394
2395         if (switch_en == !cpsw->is_emac_mode)
2396                 return 0;
2397
2398         if (!switch_en && cpsw->br_members) {
2399                 dev_err(cpsw->dev, "Remove ports from bridge before disabling switch mode\n");
2400                 return -EINVAL;
2401         }
2402
2403         rtnl_lock();
2404
2405         cpsw->is_emac_mode = !switch_en;
2406
2407         for (i = 0; i < cpsw->port_num; i++) {
2408                 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2409
2410                 if (!sl_ndev || !netif_running(sl_ndev))
2411                         continue;
2412
2413                 if_running = true;
2414         }
2415
2416         if (!if_running) {
2417                 /* all ndevs are down */
2418                 for (i = 0; i < cpsw->port_num; i++) {
2419                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2420                         struct am65_cpsw_slave_data *slave;
2421
2422                         if (!sl_ndev)
2423                                 continue;
2424
2425                         slave = am65_ndev_to_slave(sl_ndev);
2426                         if (switch_en)
2427                                 slave->port_vlan = cpsw->default_vlan;
2428                         else
2429                                 slave->port_vlan = 0;
2430                 }
2431
2432                 goto exit;
2433         }
2434
2435         cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
2436         /* clean up ALE table */
2437         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_CLEAR, 1);
2438         cpsw_ale_control_get(cpsw->ale, HOST_PORT_NUM, ALE_AGEOUT);
2439
2440         if (switch_en) {
2441                 dev_info(cpsw->dev, "Enable switch mode\n");
2442
2443                 am65_cpsw_init_host_port_switch(cpsw);
2444
2445                 for (i = 0; i < cpsw->port_num; i++) {
2446                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2447                         struct am65_cpsw_slave_data *slave;
2448                         struct am65_cpsw_port *port;
2449
2450                         if (!sl_ndev)
2451                                 continue;
2452
2453                         port = am65_ndev_to_port(sl_ndev);
2454                         slave = am65_ndev_to_slave(sl_ndev);
2455                         slave->port_vlan = cpsw->default_vlan;
2456
2457                         if (netif_running(sl_ndev))
2458                                 am65_cpsw_init_port_switch_ale(port);
2459                 }
2460
2461         } else {
2462                 dev_info(cpsw->dev, "Disable switch mode\n");
2463
2464                 am65_cpsw_init_host_port_emac(cpsw);
2465
2466                 for (i = 0; i < cpsw->port_num; i++) {
2467                         struct net_device *sl_ndev = cpsw->ports[i].ndev;
2468                         struct am65_cpsw_port *port;
2469
2470                         if (!sl_ndev)
2471                                 continue;
2472
2473                         port = am65_ndev_to_port(sl_ndev);
2474                         port->slave.port_vlan = 0;
2475                         if (netif_running(sl_ndev))
2476                                 am65_cpsw_init_port_emac_ale(port);
2477                 }
2478         }
2479         cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_BYPASS, 0);
2480 exit:
2481         rtnl_unlock();
2482
2483         return 0;
2484 }
2485
2486 static const struct devlink_param am65_cpsw_devlink_params[] = {
2487         DEVLINK_PARAM_DRIVER(AM65_CPSW_DL_PARAM_SWITCH_MODE, "switch_mode",
2488                              DEVLINK_PARAM_TYPE_BOOL,
2489                              BIT(DEVLINK_PARAM_CMODE_RUNTIME),
2490                              am65_cpsw_dl_switch_mode_get,
2491                              am65_cpsw_dl_switch_mode_set, NULL),
2492 };
2493
2494 static int am65_cpsw_nuss_register_devlink(struct am65_cpsw_common *common)
2495 {
2496         struct devlink_port_attrs attrs = {};
2497         struct am65_cpsw_devlink *dl_priv;
2498         struct device *dev = common->dev;
2499         struct devlink_port *dl_port;
2500         struct am65_cpsw_port *port;
2501         int ret = 0;
2502         int i;
2503
2504         common->devlink =
2505                 devlink_alloc(&am65_cpsw_devlink_ops, sizeof(*dl_priv), dev);
2506         if (!common->devlink)
2507                 return -ENOMEM;
2508
2509         dl_priv = devlink_priv(common->devlink);
2510         dl_priv->common = common;
2511
2512         /* Provide devlink hook to switch mode when multiple external ports
2513          * are present NUSS switchdev driver is enabled.
2514          */
2515         if (!AM65_CPSW_IS_CPSW2G(common) &&
2516             IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) {
2517                 ret = devlink_params_register(common->devlink,
2518                                               am65_cpsw_devlink_params,
2519                                               ARRAY_SIZE(am65_cpsw_devlink_params));
2520                 if (ret) {
2521                         dev_err(dev, "devlink params reg fail ret:%d\n", ret);
2522                         goto dl_unreg;
2523                 }
2524         }
2525
2526         for (i = 1; i <= common->port_num; i++) {
2527                 port = am65_common_get_port(common, i);
2528                 dl_port = &port->devlink_port;
2529
2530                 if (port->ndev)
2531                         attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
2532                 else
2533                         attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED;
2534                 attrs.phys.port_number = port->port_id;
2535                 attrs.switch_id.id_len = sizeof(resource_size_t);
2536                 memcpy(attrs.switch_id.id, common->switch_id, attrs.switch_id.id_len);
2537                 devlink_port_attrs_set(dl_port, &attrs);
2538
2539                 ret = devlink_port_register(common->devlink, dl_port, port->port_id);
2540                 if (ret) {
2541                         dev_err(dev, "devlink_port reg fail for port %d, ret:%d\n",
2542                                 port->port_id, ret);
2543                         goto dl_port_unreg;
2544                 }
2545         }
2546         devlink_register(common->devlink);
2547         return ret;
2548
2549 dl_port_unreg:
2550         for (i = i - 1; i >= 1; i--) {
2551                 port = am65_common_get_port(common, i);
2552                 dl_port = &port->devlink_port;
2553
2554                 devlink_port_unregister(dl_port);
2555         }
2556 dl_unreg:
2557         devlink_free(common->devlink);
2558         return ret;
2559 }
2560
2561 static void am65_cpsw_unregister_devlink(struct am65_cpsw_common *common)
2562 {
2563         struct devlink_port *dl_port;
2564         struct am65_cpsw_port *port;
2565         int i;
2566
2567         devlink_unregister(common->devlink);
2568
2569         for (i = 1; i <= common->port_num; i++) {
2570                 port = am65_common_get_port(common, i);
2571                 dl_port = &port->devlink_port;
2572
2573                 devlink_port_unregister(dl_port);
2574         }
2575
2576         if (!AM65_CPSW_IS_CPSW2G(common) &&
2577             IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2578                 devlink_params_unregister(common->devlink,
2579                                           am65_cpsw_devlink_params,
2580                                           ARRAY_SIZE(am65_cpsw_devlink_params));
2581
2582         devlink_free(common->devlink);
2583 }
2584
2585 static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common)
2586 {
2587         struct device *dev = common->dev;
2588         struct am65_cpsw_port *port;
2589         int ret = 0, i;
2590
2591         /* init tx channels */
2592         ret = am65_cpsw_nuss_init_tx_chns(common);
2593         if (ret)
2594                 return ret;
2595         ret = am65_cpsw_nuss_init_rx_chns(common);
2596         if (ret)
2597                 return ret;
2598
2599         ret = am65_cpsw_nuss_register_devlink(common);
2600         if (ret)
2601                 return ret;
2602
2603         for (i = 0; i < common->port_num; i++) {
2604                 port = &common->ports[i];
2605
2606                 if (!port->ndev)
2607                         continue;
2608
2609                 SET_NETDEV_DEVLINK_PORT(port->ndev, &port->devlink_port);
2610
2611                 ret = register_netdev(port->ndev);
2612                 if (ret) {
2613                         dev_err(dev, "error registering slave net device%i %d\n",
2614                                 i, ret);
2615                         goto err_cleanup_ndev;
2616                 }
2617         }
2618
2619         ret = am65_cpsw_register_notifiers(common);
2620         if (ret)
2621                 goto err_cleanup_ndev;
2622
2623         /* can't auto unregister ndev using devm_add_action() due to
2624          * devres release sequence in DD core for DMA
2625          */
2626
2627         return 0;
2628
2629 err_cleanup_ndev:
2630         am65_cpsw_nuss_cleanup_ndev(common);
2631         am65_cpsw_unregister_devlink(common);
2632
2633         return ret;
2634 }
2635
2636 int am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common *common, int num_tx)
2637 {
2638         int ret;
2639
2640         common->tx_ch_num = num_tx;
2641         ret = am65_cpsw_nuss_init_tx_chns(common);
2642
2643         return ret;
2644 }
2645
2646 struct am65_cpsw_soc_pdata {
2647         u32     quirks_dis;
2648 };
2649
2650 static const struct am65_cpsw_soc_pdata am65x_soc_sr2_0 = {
2651         .quirks_dis = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2652 };
2653
2654 static const struct soc_device_attribute am65_cpsw_socinfo[] = {
2655         { .family = "AM65X",
2656           .revision = "SR2.0",
2657           .data = &am65x_soc_sr2_0
2658         },
2659         {/* sentinel */}
2660 };
2661
2662 static const struct am65_cpsw_pdata am65x_sr1_0 = {
2663         .quirks = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2664         .ale_dev_id = "am65x-cpsw2g",
2665         .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2666 };
2667
2668 static const struct am65_cpsw_pdata j721e_pdata = {
2669         .quirks = 0,
2670         .ale_dev_id = "am65x-cpsw2g",
2671         .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2672 };
2673
2674 static const struct am65_cpsw_pdata am64x_cpswxg_pdata = {
2675         .quirks = 0,
2676         .ale_dev_id = "am64-cpswxg",
2677         .fdqring_mode = K3_RINGACC_RING_MODE_RING,
2678 };
2679
2680 static const struct am65_cpsw_pdata j7200_cpswxg_pdata = {
2681         .quirks = 0,
2682         .ale_dev_id = "am64-cpswxg",
2683         .fdqring_mode = K3_RINGACC_RING_MODE_RING,
2684         .extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
2685 };
2686
2687 static const struct am65_cpsw_pdata j721e_cpswxg_pdata = {
2688         .quirks = 0,
2689         .ale_dev_id = "am64-cpswxg",
2690         .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2691         .extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
2692 };
2693
2694 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
2695         { .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0},
2696         { .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata},
2697         { .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata},
2698         { .compatible = "ti,j7200-cpswxg-nuss", .data = &j7200_cpswxg_pdata},
2699         { .compatible = "ti,j721e-cpswxg-nuss", .data = &j721e_cpswxg_pdata},
2700         { /* sentinel */ },
2701 };
2702 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);
2703
2704 static void am65_cpsw_nuss_apply_socinfo(struct am65_cpsw_common *common)
2705 {
2706         const struct soc_device_attribute *soc;
2707
2708         soc = soc_device_match(am65_cpsw_socinfo);
2709         if (soc && soc->data) {
2710                 const struct am65_cpsw_soc_pdata *socdata = soc->data;
2711
2712                 /* disable quirks */
2713                 common->pdata.quirks &= ~socdata->quirks_dis;
2714         }
2715 }
2716
2717 static int am65_cpsw_nuss_probe(struct platform_device *pdev)
2718 {
2719         struct cpsw_ale_params ale_params = { 0 };
2720         const struct of_device_id *of_id;
2721         struct device *dev = &pdev->dev;
2722         struct am65_cpsw_common *common;
2723         struct device_node *node;
2724         struct resource *res;
2725         struct clk *clk;
2726         u64 id_temp;
2727         int ret, i;
2728         int ale_entries;
2729
2730         common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
2731         if (!common)
2732                 return -ENOMEM;
2733         common->dev = dev;
2734
2735         of_id = of_match_device(am65_cpsw_nuss_of_mtable, dev);
2736         if (!of_id)
2737                 return -EINVAL;
2738         common->pdata = *(const struct am65_cpsw_pdata *)of_id->data;
2739
2740         am65_cpsw_nuss_apply_socinfo(common);
2741
2742         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cpsw_nuss");
2743         common->ss_base = devm_ioremap_resource(&pdev->dev, res);
2744         if (IS_ERR(common->ss_base))
2745                 return PTR_ERR(common->ss_base);
2746         common->cpsw_base = common->ss_base + AM65_CPSW_CPSW_NU_BASE;
2747         /* Use device's physical base address as switch id */
2748         id_temp = cpu_to_be64(res->start);
2749         memcpy(common->switch_id, &id_temp, sizeof(res->start));
2750
2751         node = of_get_child_by_name(dev->of_node, "ethernet-ports");
2752         if (!node)
2753                 return -ENOENT;
2754         common->port_num = of_get_child_count(node);
2755         of_node_put(node);
2756         if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS)
2757                 return -ENOENT;
2758
2759         common->rx_flow_id_base = -1;
2760         init_completion(&common->tdown_complete);
2761         common->tx_ch_num = 1;
2762         common->pf_p0_rx_ptype_rrobin = false;
2763         common->default_vlan = 1;
2764
2765         common->ports = devm_kcalloc(dev, common->port_num,
2766                                      sizeof(*common->ports),
2767                                      GFP_KERNEL);
2768         if (!common->ports)
2769                 return -ENOMEM;
2770
2771         clk = devm_clk_get(dev, "fck");
2772         if (IS_ERR(clk))
2773                 return dev_err_probe(dev, PTR_ERR(clk), "getting fck clock\n");
2774         common->bus_freq = clk_get_rate(clk);
2775
2776         pm_runtime_enable(dev);
2777         ret = pm_runtime_resume_and_get(dev);
2778         if (ret < 0) {
2779                 pm_runtime_disable(dev);
2780                 return ret;
2781         }
2782
2783         node = of_get_child_by_name(dev->of_node, "mdio");
2784         if (!node) {
2785                 dev_warn(dev, "MDIO node not found\n");
2786         } else if (of_device_is_available(node)) {
2787                 struct platform_device *mdio_pdev;
2788
2789                 mdio_pdev = of_platform_device_create(node, NULL, dev);
2790                 if (!mdio_pdev) {
2791                         ret = -ENODEV;
2792                         goto err_pm_clear;
2793                 }
2794
2795                 common->mdio_dev =  &mdio_pdev->dev;
2796         }
2797         of_node_put(node);
2798
2799         am65_cpsw_nuss_get_ver(common);
2800
2801         ret = am65_cpsw_nuss_init_host_p(common);
2802         if (ret)
2803                 goto err_of_clear;
2804
2805         ret = am65_cpsw_nuss_init_slave_ports(common);
2806         if (ret)
2807                 goto err_of_clear;
2808
2809         /* init common data */
2810         ale_params.dev = dev;
2811         ale_params.ale_ageout = AM65_CPSW_ALE_AGEOUT_DEFAULT;
2812         ale_params.ale_ports = common->port_num + 1;
2813         ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE;
2814         ale_params.dev_id = common->pdata.ale_dev_id;
2815         ale_params.bus_freq = common->bus_freq;
2816
2817         common->ale = cpsw_ale_create(&ale_params);
2818         if (IS_ERR(common->ale)) {
2819                 dev_err(dev, "error initializing ale engine\n");
2820                 ret = PTR_ERR(common->ale);
2821                 goto err_of_clear;
2822         }
2823
2824         ale_entries = common->ale->params.ale_entries;
2825         common->ale_context = devm_kzalloc(dev,
2826                                            ale_entries * ALE_ENTRY_WORDS * sizeof(u32),
2827                                            GFP_KERNEL);
2828         ret = am65_cpsw_init_cpts(common);
2829         if (ret)
2830                 goto err_of_clear;
2831
2832         /* init ports */
2833         for (i = 0; i < common->port_num; i++)
2834                 am65_cpsw_nuss_slave_disable_unused(&common->ports[i]);
2835
2836         dev_set_drvdata(dev, common);
2837
2838         common->is_emac_mode = true;
2839
2840         ret = am65_cpsw_nuss_init_ndevs(common);
2841         if (ret)
2842                 goto err_free_phylink;
2843
2844         ret = am65_cpsw_nuss_register_ndevs(common);
2845         if (ret)
2846                 goto err_free_phylink;
2847
2848         pm_runtime_put(dev);
2849         return 0;
2850
2851 err_free_phylink:
2852         am65_cpsw_nuss_phylink_cleanup(common);
2853 err_of_clear:
2854         of_platform_device_destroy(common->mdio_dev, NULL);
2855 err_pm_clear:
2856         pm_runtime_put_sync(dev);
2857         pm_runtime_disable(dev);
2858         return ret;
2859 }
2860
2861 static int am65_cpsw_nuss_remove(struct platform_device *pdev)
2862 {
2863         struct device *dev = &pdev->dev;
2864         struct am65_cpsw_common *common;
2865         int ret;
2866
2867         common = dev_get_drvdata(dev);
2868
2869         ret = pm_runtime_resume_and_get(&pdev->dev);
2870         if (ret < 0)
2871                 return ret;
2872
2873         am65_cpsw_unregister_devlink(common);
2874         am65_cpsw_unregister_notifiers(common);
2875
2876         /* must unregister ndevs here because DD release_driver routine calls
2877          * dma_deconfigure(dev) before devres_release_all(dev)
2878          */
2879         am65_cpsw_nuss_cleanup_ndev(common);
2880         am65_cpsw_nuss_phylink_cleanup(common);
2881
2882         of_platform_device_destroy(common->mdio_dev, NULL);
2883
2884         pm_runtime_put_sync(&pdev->dev);
2885         pm_runtime_disable(&pdev->dev);
2886         return 0;
2887 }
2888
2889 static int am65_cpsw_nuss_suspend(struct device *dev)
2890 {
2891         struct am65_cpsw_common *common = dev_get_drvdata(dev);
2892         struct am65_cpsw_host *host_p = am65_common_get_host(common);
2893         struct am65_cpsw_port *port;
2894         struct net_device *ndev;
2895         int i, ret;
2896
2897         cpsw_ale_dump(common->ale, common->ale_context);
2898         host_p->vid_context = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2899         for (i = 0; i < common->port_num; i++) {
2900                 port = &common->ports[i];
2901                 ndev = port->ndev;
2902
2903                 if (!ndev)
2904                         continue;
2905
2906                 port->vid_context = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2907                 netif_device_detach(ndev);
2908                 if (netif_running(ndev)) {
2909                         rtnl_lock();
2910                         ret = am65_cpsw_nuss_ndo_slave_stop(ndev);
2911                         rtnl_unlock();
2912                         if (ret < 0) {
2913                                 netdev_err(ndev, "failed to stop: %d", ret);
2914                                 return ret;
2915                         }
2916                 }
2917         }
2918
2919         am65_cpts_suspend(common->cpts);
2920
2921         am65_cpsw_nuss_remove_rx_chns(common);
2922         am65_cpsw_nuss_remove_tx_chns(common);
2923
2924         return 0;
2925 }
2926
2927 static int am65_cpsw_nuss_resume(struct device *dev)
2928 {
2929         struct am65_cpsw_common *common = dev_get_drvdata(dev);
2930         struct am65_cpsw_port *port;
2931         struct net_device *ndev;
2932         int i, ret;
2933         struct am65_cpsw_host *host_p = am65_common_get_host(common);
2934
2935         ret = am65_cpsw_nuss_init_tx_chns(common);
2936         if (ret)
2937                 return ret;
2938         ret = am65_cpsw_nuss_init_rx_chns(common);
2939         if (ret)
2940                 return ret;
2941
2942         /* If RX IRQ was disabled before suspend, keep it disabled */
2943         if (common->rx_irq_disabled)
2944                 disable_irq(common->rx_chns.irq);
2945
2946         am65_cpts_resume(common->cpts);
2947
2948         for (i = 0; i < common->port_num; i++) {
2949                 port = &common->ports[i];
2950                 ndev = port->ndev;
2951
2952                 if (!ndev)
2953                         continue;
2954
2955                 if (netif_running(ndev)) {
2956                         rtnl_lock();
2957                         ret = am65_cpsw_nuss_ndo_slave_open(ndev);
2958                         rtnl_unlock();
2959                         if (ret < 0) {
2960                                 netdev_err(ndev, "failed to start: %d", ret);
2961                                 return ret;
2962                         }
2963                 }
2964
2965                 netif_device_attach(ndev);
2966                 writel(port->vid_context, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2967         }
2968
2969         writel(host_p->vid_context, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2970         cpsw_ale_restore(common->ale, common->ale_context);
2971
2972         return 0;
2973 }
2974
2975 static const struct dev_pm_ops am65_cpsw_nuss_dev_pm_ops = {
2976         SYSTEM_SLEEP_PM_OPS(am65_cpsw_nuss_suspend, am65_cpsw_nuss_resume)
2977 };
2978
2979 static struct platform_driver am65_cpsw_nuss_driver = {
2980         .driver = {
2981                 .name    = AM65_CPSW_DRV_NAME,
2982                 .of_match_table = am65_cpsw_nuss_of_mtable,
2983                 .pm = &am65_cpsw_nuss_dev_pm_ops,
2984         },
2985         .probe = am65_cpsw_nuss_probe,
2986         .remove = am65_cpsw_nuss_remove,
2987 };
2988
2989 module_platform_driver(am65_cpsw_nuss_driver);
2990
2991 MODULE_LICENSE("GPL v2");
2992 MODULE_AUTHOR("Grygorii Strashko <grygorii.strashko@ti.com>");
2993 MODULE_DESCRIPTION("TI AM65 CPSW Ethernet driver");