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/mfd/syscon.h> 28 #include <linux/sys_soc.h> 29 #include <linux/dma/ti-cppi5.h> 30 #include <linux/dma/k3-udma-glue.h> 31 #include <net/switchdev.h> 32 33 #include "cpsw_ale.h" 34 #include "cpsw_sl.h" 35 #include "am65-cpsw-nuss.h" 36 #include "am65-cpsw-switchdev.h" 37 #include "k3-cppi-desc-pool.h" 38 #include "am65-cpts.h" 39 40 #define AM65_CPSW_SS_BASE 0x0 41 #define AM65_CPSW_SGMII_BASE 0x100 42 #define AM65_CPSW_XGMII_BASE 0x2100 43 #define AM65_CPSW_CPSW_NU_BASE 0x20000 44 #define AM65_CPSW_NU_PORTS_BASE 0x1000 45 #define AM65_CPSW_NU_FRAM_BASE 0x12000 46 #define AM65_CPSW_NU_STATS_BASE 0x1a000 47 #define AM65_CPSW_NU_ALE_BASE 0x1e000 48 #define AM65_CPSW_NU_CPTS_BASE 0x1d000 49 50 #define AM65_CPSW_NU_PORTS_OFFSET 0x1000 51 #define AM65_CPSW_NU_STATS_PORT_OFFSET 0x200 52 #define AM65_CPSW_NU_FRAM_PORT_OFFSET 0x200 53 54 #define AM65_CPSW_MAX_PORTS 8 55 56 #define AM65_CPSW_MIN_PACKET_SIZE VLAN_ETH_ZLEN 57 #define AM65_CPSW_MAX_PACKET_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN) 58 59 #define AM65_CPSW_REG_CTL 0x004 60 #define AM65_CPSW_REG_STAT_PORT_EN 0x014 61 #define AM65_CPSW_REG_PTYPE 0x018 62 63 #define AM65_CPSW_P0_REG_CTL 0x004 64 #define AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET 0x008 65 66 #define AM65_CPSW_PORT_REG_PRI_CTL 0x01c 67 #define AM65_CPSW_PORT_REG_RX_PRI_MAP 0x020 68 #define AM65_CPSW_PORT_REG_RX_MAXLEN 0x024 69 70 #define AM65_CPSW_PORTN_REG_SA_L 0x308 71 #define AM65_CPSW_PORTN_REG_SA_H 0x30c 72 #define AM65_CPSW_PORTN_REG_TS_CTL 0x310 73 #define AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG 0x314 74 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG 0x318 75 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 0x31C 76 77 #define AM65_CPSW_CTL_VLAN_AWARE BIT(1) 78 #define AM65_CPSW_CTL_P0_ENABLE BIT(2) 79 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE BIT(13) 80 #define AM65_CPSW_CTL_P0_RX_PAD BIT(14) 81 82 /* AM65_CPSW_P0_REG_CTL */ 83 #define AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN BIT(0) 84 85 /* AM65_CPSW_PORT_REG_PRI_CTL */ 86 #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN BIT(8) 87 88 /* AM65_CPSW_PN_TS_CTL register fields */ 89 #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN BIT(4) 90 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN BIT(5) 91 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT2_EN BIT(6) 92 #define AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN BIT(7) 93 #define AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN BIT(10) 94 #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN BIT(11) 95 #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT 16 96 97 /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */ 98 #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT 16 99 100 /* AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 */ 101 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 BIT(16) 102 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 BIT(17) 103 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 BIT(18) 104 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 BIT(19) 105 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 BIT(20) 106 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 BIT(21) 107 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 BIT(22) 108 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO BIT(23) 109 110 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */ 111 #define AM65_CPSW_TS_EVENT_MSG_TYPE_BITS (BIT(0) | BIT(1) | BIT(2) | BIT(3)) 112 113 #define AM65_CPSW_TS_SEQ_ID_OFFSET (0x1e) 114 115 #define AM65_CPSW_TS_TX_ANX_ALL_EN \ 116 (AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN | \ 117 AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN | \ 118 AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN) 119 120 #define AM65_CPSW_ALE_AGEOUT_DEFAULT 30 121 /* Number of TX/RX descriptors */ 122 #define AM65_CPSW_MAX_TX_DESC 500 123 #define AM65_CPSW_MAX_RX_DESC 500 124 125 #define AM65_CPSW_NAV_PS_DATA_SIZE 16 126 #define AM65_CPSW_NAV_SW_DATA_SIZE 16 127 128 #define AM65_CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK | \ 129 NETIF_MSG_IFUP | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | \ 130 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR) 131 132 static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave, 133 const u8 *dev_addr) 134 { 135 u32 mac_hi = (dev_addr[0] << 0) | (dev_addr[1] << 8) | 136 (dev_addr[2] << 16) | (dev_addr[3] << 24); 137 u32 mac_lo = (dev_addr[4] << 0) | (dev_addr[5] << 8); 138 139 writel(mac_hi, slave->port_base + AM65_CPSW_PORTN_REG_SA_H); 140 writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L); 141 } 142 143 static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port) 144 { 145 cpsw_sl_reset(port->slave.mac_sl, 100); 146 /* Max length register has to be restored after MAC SL reset */ 147 writel(AM65_CPSW_MAX_PACKET_SIZE, 148 port->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN); 149 } 150 151 static void am65_cpsw_nuss_get_ver(struct am65_cpsw_common *common) 152 { 153 common->nuss_ver = readl(common->ss_base); 154 common->cpsw_ver = readl(common->cpsw_base); 155 dev_info(common->dev, 156 "initializing am65 cpsw nuss version 0x%08X, cpsw version 0x%08X Ports: %u quirks:%08x\n", 157 common->nuss_ver, 158 common->cpsw_ver, 159 common->port_num + 1, 160 common->pdata.quirks); 161 } 162 163 static int am65_cpsw_nuss_ndo_slave_add_vid(struct net_device *ndev, 164 __be16 proto, u16 vid) 165 { 166 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 167 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 168 u32 port_mask, unreg_mcast = 0; 169 int ret; 170 171 if (!common->is_emac_mode) 172 return 0; 173 174 if (!netif_running(ndev) || !vid) 175 return 0; 176 177 ret = pm_runtime_resume_and_get(common->dev); 178 if (ret < 0) 179 return ret; 180 181 port_mask = BIT(port->port_id) | ALE_PORT_HOST; 182 if (!vid) 183 unreg_mcast = port_mask; 184 dev_info(common->dev, "Adding vlan %d to vlan filter\n", vid); 185 ret = cpsw_ale_vlan_add_modify(common->ale, vid, port_mask, 186 unreg_mcast, port_mask, 0); 187 188 pm_runtime_put(common->dev); 189 return ret; 190 } 191 192 static int am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device *ndev, 193 __be16 proto, u16 vid) 194 { 195 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 196 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 197 int ret; 198 199 if (!common->is_emac_mode) 200 return 0; 201 202 if (!netif_running(ndev) || !vid) 203 return 0; 204 205 ret = pm_runtime_resume_and_get(common->dev); 206 if (ret < 0) 207 return ret; 208 209 dev_info(common->dev, "Removing vlan %d from vlan filter\n", vid); 210 ret = cpsw_ale_del_vlan(common->ale, vid, 211 BIT(port->port_id) | ALE_PORT_HOST); 212 213 pm_runtime_put(common->dev); 214 return ret; 215 } 216 217 static void am65_cpsw_slave_set_promisc(struct am65_cpsw_port *port, 218 bool promisc) 219 { 220 struct am65_cpsw_common *common = port->common; 221 222 if (promisc && !common->is_emac_mode) { 223 dev_dbg(common->dev, "promisc mode requested in switch mode"); 224 return; 225 } 226 227 if (promisc) { 228 /* Enable promiscuous mode */ 229 cpsw_ale_control_set(common->ale, port->port_id, 230 ALE_PORT_MACONLY_CAF, 1); 231 dev_dbg(common->dev, "promisc enabled\n"); 232 } else { 233 /* Disable promiscuous mode */ 234 cpsw_ale_control_set(common->ale, port->port_id, 235 ALE_PORT_MACONLY_CAF, 0); 236 dev_dbg(common->dev, "promisc disabled\n"); 237 } 238 } 239 240 static void am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device *ndev) 241 { 242 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 243 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 244 u32 port_mask; 245 bool promisc; 246 247 promisc = !!(ndev->flags & IFF_PROMISC); 248 am65_cpsw_slave_set_promisc(port, promisc); 249 250 if (promisc) 251 return; 252 253 /* Restore allmulti on vlans if necessary */ 254 cpsw_ale_set_allmulti(common->ale, 255 ndev->flags & IFF_ALLMULTI, port->port_id); 256 257 port_mask = ALE_PORT_HOST; 258 /* Clear all mcast from ALE */ 259 cpsw_ale_flush_multicast(common->ale, port_mask, -1); 260 261 if (!netdev_mc_empty(ndev)) { 262 struct netdev_hw_addr *ha; 263 264 /* program multicast address list into ALE register */ 265 netdev_for_each_mc_addr(ha, ndev) { 266 cpsw_ale_add_mcast(common->ale, ha->addr, 267 port_mask, 0, 0, 0); 268 } 269 } 270 } 271 272 static void am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device *ndev, 273 unsigned int txqueue) 274 { 275 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 276 struct am65_cpsw_tx_chn *tx_chn; 277 struct netdev_queue *netif_txq; 278 unsigned long trans_start; 279 280 netif_txq = netdev_get_tx_queue(ndev, txqueue); 281 tx_chn = &common->tx_chns[txqueue]; 282 trans_start = READ_ONCE(netif_txq->trans_start); 283 284 netdev_err(ndev, "txq:%d DRV_XOFF:%d tmo:%u dql_avail:%d free_desc:%zu\n", 285 txqueue, 286 netif_tx_queue_stopped(netif_txq), 287 jiffies_to_msecs(jiffies - trans_start), 288 dql_avail(&netif_txq->dql), 289 k3_cppi_desc_pool_avail(tx_chn->desc_pool)); 290 291 if (netif_tx_queue_stopped(netif_txq)) { 292 /* try recover if stopped by us */ 293 txq_trans_update(netif_txq); 294 netif_tx_wake_queue(netif_txq); 295 } 296 } 297 298 static int am65_cpsw_nuss_rx_push(struct am65_cpsw_common *common, 299 struct sk_buff *skb) 300 { 301 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns; 302 struct cppi5_host_desc_t *desc_rx; 303 struct device *dev = common->dev; 304 u32 pkt_len = skb_tailroom(skb); 305 dma_addr_t desc_dma; 306 dma_addr_t buf_dma; 307 void *swdata; 308 309 desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool); 310 if (!desc_rx) { 311 dev_err(dev, "Failed to allocate RXFDQ descriptor\n"); 312 return -ENOMEM; 313 } 314 desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx); 315 316 buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len, 317 DMA_FROM_DEVICE); 318 if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) { 319 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); 320 dev_err(dev, "Failed to map rx skb buffer\n"); 321 return -EINVAL; 322 } 323 324 cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT, 325 AM65_CPSW_NAV_PS_DATA_SIZE); 326 k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma); 327 cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb)); 328 swdata = cppi5_hdesc_get_swdata(desc_rx); 329 *((void **)swdata) = skb; 330 331 return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma); 332 } 333 334 void am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common *common) 335 { 336 struct am65_cpsw_host *host_p = am65_common_get_host(common); 337 u32 val, pri_map; 338 339 /* P0 set Receive Priority Type */ 340 val = readl(host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL); 341 342 if (common->pf_p0_rx_ptype_rrobin) { 343 val |= AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN; 344 /* Enet Ports fifos works in fixed priority mode only, so 345 * reset P0_Rx_Pri_Map so all packet will go in Enet fifo 0 346 */ 347 pri_map = 0x0; 348 } else { 349 val &= ~AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN; 350 /* restore P0_Rx_Pri_Map */ 351 pri_map = 0x76543210; 352 } 353 354 writel(pri_map, host_p->port_base + AM65_CPSW_PORT_REG_RX_PRI_MAP); 355 writel(val, host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL); 356 } 357 358 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common); 359 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common); 360 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port); 361 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port); 362 363 static int am65_cpsw_nuss_common_open(struct am65_cpsw_common *common, 364 netdev_features_t features) 365 { 366 struct am65_cpsw_host *host_p = am65_common_get_host(common); 367 int port_idx, i, ret; 368 struct sk_buff *skb; 369 u32 val, port_mask; 370 371 if (common->usage_count) 372 return 0; 373 374 /* Control register */ 375 writel(AM65_CPSW_CTL_P0_ENABLE | AM65_CPSW_CTL_P0_TX_CRC_REMOVE | 376 AM65_CPSW_CTL_VLAN_AWARE | AM65_CPSW_CTL_P0_RX_PAD, 377 common->cpsw_base + AM65_CPSW_REG_CTL); 378 /* Max length register */ 379 writel(AM65_CPSW_MAX_PACKET_SIZE, 380 host_p->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN); 381 /* set base flow_id */ 382 writel(common->rx_flow_id_base, 383 host_p->port_base + AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET); 384 /* en tx crc offload */ 385 writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN, host_p->port_base + AM65_CPSW_P0_REG_CTL); 386 387 am65_cpsw_nuss_set_p0_ptype(common); 388 389 /* enable statistic */ 390 val = BIT(HOST_PORT_NUM); 391 for (port_idx = 0; port_idx < common->port_num; port_idx++) { 392 struct am65_cpsw_port *port = &common->ports[port_idx]; 393 394 if (!port->disabled) 395 val |= BIT(port->port_id); 396 } 397 writel(val, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN); 398 399 /* disable priority elevation */ 400 writel(0, common->cpsw_base + AM65_CPSW_REG_PTYPE); 401 402 cpsw_ale_start(common->ale); 403 404 /* limit to one RX flow only */ 405 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, 406 ALE_DEFAULT_THREAD_ID, 0); 407 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, 408 ALE_DEFAULT_THREAD_ENABLE, 1); 409 /* switch to vlan unaware mode */ 410 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 1); 411 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, 412 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 413 414 /* default vlan cfg: create mask based on enabled ports */ 415 port_mask = GENMASK(common->port_num, 0) & 416 ~common->disabled_ports_mask; 417 418 cpsw_ale_add_vlan(common->ale, 0, port_mask, 419 port_mask, port_mask, 420 port_mask & ~ALE_PORT_HOST); 421 422 if (common->is_emac_mode) 423 am65_cpsw_init_host_port_emac(common); 424 else 425 am65_cpsw_init_host_port_switch(common); 426 427 for (i = 0; i < common->rx_chns.descs_num; i++) { 428 skb = __netdev_alloc_skb_ip_align(NULL, 429 AM65_CPSW_MAX_PACKET_SIZE, 430 GFP_KERNEL); 431 if (!skb) { 432 dev_err(common->dev, "cannot allocate skb\n"); 433 return -ENOMEM; 434 } 435 436 ret = am65_cpsw_nuss_rx_push(common, skb); 437 if (ret < 0) { 438 dev_err(common->dev, 439 "cannot submit skb to channel rx, error %d\n", 440 ret); 441 kfree_skb(skb); 442 return ret; 443 } 444 kmemleak_not_leak(skb); 445 } 446 k3_udma_glue_enable_rx_chn(common->rx_chns.rx_chn); 447 448 for (i = 0; i < common->tx_ch_num; i++) { 449 ret = k3_udma_glue_enable_tx_chn(common->tx_chns[i].tx_chn); 450 if (ret) 451 return ret; 452 napi_enable(&common->tx_chns[i].napi_tx); 453 } 454 455 napi_enable(&common->napi_rx); 456 if (common->rx_irq_disabled) { 457 common->rx_irq_disabled = false; 458 enable_irq(common->rx_chns.irq); 459 } 460 461 dev_dbg(common->dev, "cpsw_nuss started\n"); 462 return 0; 463 } 464 465 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma); 466 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma); 467 468 static int am65_cpsw_nuss_common_stop(struct am65_cpsw_common *common) 469 { 470 int i; 471 472 if (common->usage_count != 1) 473 return 0; 474 475 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, 476 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 477 478 /* shutdown tx channels */ 479 atomic_set(&common->tdown_cnt, common->tx_ch_num); 480 /* ensure new tdown_cnt value is visible */ 481 smp_mb__after_atomic(); 482 reinit_completion(&common->tdown_complete); 483 484 for (i = 0; i < common->tx_ch_num; i++) 485 k3_udma_glue_tdown_tx_chn(common->tx_chns[i].tx_chn, false); 486 487 i = wait_for_completion_timeout(&common->tdown_complete, 488 msecs_to_jiffies(1000)); 489 if (!i) 490 dev_err(common->dev, "tx timeout\n"); 491 for (i = 0; i < common->tx_ch_num; i++) 492 napi_disable(&common->tx_chns[i].napi_tx); 493 494 for (i = 0; i < common->tx_ch_num; i++) { 495 k3_udma_glue_reset_tx_chn(common->tx_chns[i].tx_chn, 496 &common->tx_chns[i], 497 am65_cpsw_nuss_tx_cleanup); 498 k3_udma_glue_disable_tx_chn(common->tx_chns[i].tx_chn); 499 } 500 501 k3_udma_glue_tdown_rx_chn(common->rx_chns.rx_chn, true); 502 napi_disable(&common->napi_rx); 503 504 for (i = 0; i < AM65_CPSW_MAX_RX_FLOWS; i++) 505 k3_udma_glue_reset_rx_chn(common->rx_chns.rx_chn, i, 506 &common->rx_chns, 507 am65_cpsw_nuss_rx_cleanup, !!i); 508 509 k3_udma_glue_disable_rx_chn(common->rx_chns.rx_chn); 510 511 cpsw_ale_stop(common->ale); 512 513 writel(0, common->cpsw_base + AM65_CPSW_REG_CTL); 514 writel(0, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN); 515 516 dev_dbg(common->dev, "cpsw_nuss stopped\n"); 517 return 0; 518 } 519 520 static int am65_cpsw_nuss_ndo_slave_stop(struct net_device *ndev) 521 { 522 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 523 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 524 int ret; 525 526 phylink_stop(port->slave.phylink); 527 528 netif_tx_stop_all_queues(ndev); 529 530 phylink_disconnect_phy(port->slave.phylink); 531 532 ret = am65_cpsw_nuss_common_stop(common); 533 if (ret) 534 return ret; 535 536 common->usage_count--; 537 pm_runtime_put(common->dev); 538 return 0; 539 } 540 541 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg) 542 { 543 struct am65_cpsw_port *port = arg; 544 545 if (!vdev) 546 return 0; 547 548 return am65_cpsw_nuss_ndo_slave_add_vid(port->ndev, 0, vid); 549 } 550 551 static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev) 552 { 553 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 554 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 555 int ret, i; 556 557 ret = pm_runtime_resume_and_get(common->dev); 558 if (ret < 0) 559 return ret; 560 561 /* Notify the stack of the actual queue counts. */ 562 ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num); 563 if (ret) { 564 dev_err(common->dev, "cannot set real number of tx queues\n"); 565 return ret; 566 } 567 568 ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES); 569 if (ret) { 570 dev_err(common->dev, "cannot set real number of rx queues\n"); 571 return ret; 572 } 573 574 for (i = 0; i < common->tx_ch_num; i++) 575 netdev_tx_reset_queue(netdev_get_tx_queue(ndev, i)); 576 577 ret = am65_cpsw_nuss_common_open(common, ndev->features); 578 if (ret) 579 return ret; 580 581 common->usage_count++; 582 583 am65_cpsw_port_set_sl_mac(port, ndev->dev_addr); 584 585 if (common->is_emac_mode) 586 am65_cpsw_init_port_emac_ale(port); 587 else 588 am65_cpsw_init_port_switch_ale(port); 589 590 /* mac_sl should be configured via phy-link interface */ 591 am65_cpsw_sl_ctl_reset(port); 592 593 ret = phy_set_mode_ext(port->slave.ifphy, PHY_MODE_ETHERNET, 594 port->slave.phy_if); 595 if (ret) 596 goto error_cleanup; 597 598 ret = phylink_of_phy_connect(port->slave.phylink, port->slave.phy_node, 0); 599 if (ret) 600 goto error_cleanup; 601 602 /* restore vlan configurations */ 603 vlan_for_each(ndev, cpsw_restore_vlans, port); 604 605 phylink_start(port->slave.phylink); 606 607 return 0; 608 609 error_cleanup: 610 am65_cpsw_nuss_ndo_slave_stop(ndev); 611 return ret; 612 } 613 614 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma) 615 { 616 struct am65_cpsw_rx_chn *rx_chn = data; 617 struct cppi5_host_desc_t *desc_rx; 618 struct sk_buff *skb; 619 dma_addr_t buf_dma; 620 u32 buf_dma_len; 621 void **swdata; 622 623 desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma); 624 swdata = cppi5_hdesc_get_swdata(desc_rx); 625 skb = *swdata; 626 cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len); 627 k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma); 628 629 dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE); 630 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); 631 632 dev_kfree_skb_any(skb); 633 } 634 635 static void am65_cpsw_nuss_rx_ts(struct sk_buff *skb, u32 *psdata) 636 { 637 struct skb_shared_hwtstamps *ssh; 638 u64 ns; 639 640 ns = ((u64)psdata[1] << 32) | psdata[0]; 641 642 ssh = skb_hwtstamps(skb); 643 memset(ssh, 0, sizeof(*ssh)); 644 ssh->hwtstamp = ns_to_ktime(ns); 645 } 646 647 /* RX psdata[2] word format - checksum information */ 648 #define AM65_CPSW_RX_PSD_CSUM_ADD GENMASK(15, 0) 649 #define AM65_CPSW_RX_PSD_CSUM_ERR BIT(16) 650 #define AM65_CPSW_RX_PSD_IS_FRAGMENT BIT(17) 651 #define AM65_CPSW_RX_PSD_IS_TCP BIT(18) 652 #define AM65_CPSW_RX_PSD_IPV6_VALID BIT(19) 653 #define AM65_CPSW_RX_PSD_IPV4_VALID BIT(20) 654 655 static void am65_cpsw_nuss_rx_csum(struct sk_buff *skb, u32 csum_info) 656 { 657 /* HW can verify IPv4/IPv6 TCP/UDP packets checksum 658 * csum information provides in psdata[2] word: 659 * AM65_CPSW_RX_PSD_CSUM_ERR bit - indicates csum error 660 * AM65_CPSW_RX_PSD_IPV6_VALID and AM65_CPSW_RX_PSD_IPV4_VALID 661 * bits - indicates IPv4/IPv6 packet 662 * AM65_CPSW_RX_PSD_IS_FRAGMENT bit - indicates fragmented packet 663 * AM65_CPSW_RX_PSD_CSUM_ADD has value 0xFFFF for non fragmented packets 664 * or csum value for fragmented packets if !AM65_CPSW_RX_PSD_CSUM_ERR 665 */ 666 skb_checksum_none_assert(skb); 667 668 if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM))) 669 return; 670 671 if ((csum_info & (AM65_CPSW_RX_PSD_IPV6_VALID | 672 AM65_CPSW_RX_PSD_IPV4_VALID)) && 673 !(csum_info & AM65_CPSW_RX_PSD_CSUM_ERR)) { 674 /* csum for fragmented packets is unsupported */ 675 if (!(csum_info & AM65_CPSW_RX_PSD_IS_FRAGMENT)) 676 skb->ip_summed = CHECKSUM_UNNECESSARY; 677 } 678 } 679 680 static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common, 681 u32 flow_idx) 682 { 683 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns; 684 u32 buf_dma_len, pkt_len, port_id = 0, csum_info; 685 struct am65_cpsw_ndev_priv *ndev_priv; 686 struct am65_cpsw_ndev_stats *stats; 687 struct cppi5_host_desc_t *desc_rx; 688 struct device *dev = common->dev; 689 struct sk_buff *skb, *new_skb; 690 dma_addr_t desc_dma, buf_dma; 691 struct am65_cpsw_port *port; 692 struct net_device *ndev; 693 void **swdata; 694 u32 *psdata; 695 int ret = 0; 696 697 ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_idx, &desc_dma); 698 if (ret) { 699 if (ret != -ENODATA) 700 dev_err(dev, "RX: pop chn fail %d\n", ret); 701 return ret; 702 } 703 704 if (cppi5_desc_is_tdcm(desc_dma)) { 705 dev_dbg(dev, "%s RX tdown flow: %u\n", __func__, flow_idx); 706 return 0; 707 } 708 709 desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma); 710 dev_dbg(dev, "%s flow_idx: %u desc %pad\n", 711 __func__, flow_idx, &desc_dma); 712 713 swdata = cppi5_hdesc_get_swdata(desc_rx); 714 skb = *swdata; 715 cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len); 716 k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma); 717 pkt_len = cppi5_hdesc_get_pktlen(desc_rx); 718 cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL); 719 dev_dbg(dev, "%s rx port_id:%d\n", __func__, port_id); 720 port = am65_common_get_port(common, port_id); 721 ndev = port->ndev; 722 skb->dev = ndev; 723 724 psdata = cppi5_hdesc_get_psdata(desc_rx); 725 /* add RX timestamp */ 726 if (port->rx_ts_enabled) 727 am65_cpsw_nuss_rx_ts(skb, psdata); 728 csum_info = psdata[2]; 729 dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info); 730 731 dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE); 732 733 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx); 734 735 new_skb = netdev_alloc_skb_ip_align(ndev, AM65_CPSW_MAX_PACKET_SIZE); 736 if (new_skb) { 737 ndev_priv = netdev_priv(ndev); 738 am65_cpsw_nuss_set_offload_fwd_mark(skb, ndev_priv->offload_fwd_mark); 739 skb_put(skb, pkt_len); 740 skb->protocol = eth_type_trans(skb, ndev); 741 am65_cpsw_nuss_rx_csum(skb, csum_info); 742 napi_gro_receive(&common->napi_rx, skb); 743 744 stats = this_cpu_ptr(ndev_priv->stats); 745 746 u64_stats_update_begin(&stats->syncp); 747 stats->rx_packets++; 748 stats->rx_bytes += pkt_len; 749 u64_stats_update_end(&stats->syncp); 750 kmemleak_not_leak(new_skb); 751 } else { 752 ndev->stats.rx_dropped++; 753 new_skb = skb; 754 } 755 756 if (netif_dormant(ndev)) { 757 dev_kfree_skb_any(new_skb); 758 ndev->stats.rx_dropped++; 759 return 0; 760 } 761 762 ret = am65_cpsw_nuss_rx_push(common, new_skb); 763 if (WARN_ON(ret < 0)) { 764 dev_kfree_skb_any(new_skb); 765 ndev->stats.rx_errors++; 766 ndev->stats.rx_dropped++; 767 } 768 769 return ret; 770 } 771 772 static int am65_cpsw_nuss_rx_poll(struct napi_struct *napi_rx, int budget) 773 { 774 struct am65_cpsw_common *common = am65_cpsw_napi_to_common(napi_rx); 775 int flow = AM65_CPSW_MAX_RX_FLOWS; 776 int cur_budget, ret; 777 int num_rx = 0; 778 779 /* process every flow */ 780 while (flow--) { 781 cur_budget = budget - num_rx; 782 783 while (cur_budget--) { 784 ret = am65_cpsw_nuss_rx_packets(common, flow); 785 if (ret) 786 break; 787 num_rx++; 788 } 789 790 if (num_rx >= budget) 791 break; 792 } 793 794 dev_dbg(common->dev, "%s num_rx:%d %d\n", __func__, num_rx, budget); 795 796 if (num_rx < budget && napi_complete_done(napi_rx, num_rx)) { 797 if (common->rx_irq_disabled) { 798 common->rx_irq_disabled = false; 799 enable_irq(common->rx_chns.irq); 800 } 801 } 802 803 return num_rx; 804 } 805 806 static void am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn *tx_chn, 807 struct cppi5_host_desc_t *desc) 808 { 809 struct cppi5_host_desc_t *first_desc, *next_desc; 810 dma_addr_t buf_dma, next_desc_dma; 811 u32 buf_dma_len; 812 813 first_desc = desc; 814 next_desc = first_desc; 815 816 cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len); 817 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma); 818 819 dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE); 820 821 next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc); 822 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma); 823 while (next_desc_dma) { 824 next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, 825 next_desc_dma); 826 cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len); 827 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma); 828 829 dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len, 830 DMA_TO_DEVICE); 831 832 next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc); 833 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma); 834 835 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc); 836 } 837 838 k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc); 839 } 840 841 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma) 842 { 843 struct am65_cpsw_tx_chn *tx_chn = data; 844 struct cppi5_host_desc_t *desc_tx; 845 struct sk_buff *skb; 846 void **swdata; 847 848 desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma); 849 swdata = cppi5_hdesc_get_swdata(desc_tx); 850 skb = *(swdata); 851 am65_cpsw_nuss_xmit_free(tx_chn, desc_tx); 852 853 dev_kfree_skb_any(skb); 854 } 855 856 static struct sk_buff * 857 am65_cpsw_nuss_tx_compl_packet(struct am65_cpsw_tx_chn *tx_chn, 858 dma_addr_t desc_dma) 859 { 860 struct am65_cpsw_ndev_priv *ndev_priv; 861 struct am65_cpsw_ndev_stats *stats; 862 struct cppi5_host_desc_t *desc_tx; 863 struct net_device *ndev; 864 struct sk_buff *skb; 865 void **swdata; 866 867 desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, 868 desc_dma); 869 swdata = cppi5_hdesc_get_swdata(desc_tx); 870 skb = *(swdata); 871 am65_cpsw_nuss_xmit_free(tx_chn, desc_tx); 872 873 ndev = skb->dev; 874 875 am65_cpts_tx_timestamp(tx_chn->common->cpts, skb); 876 877 ndev_priv = netdev_priv(ndev); 878 stats = this_cpu_ptr(ndev_priv->stats); 879 u64_stats_update_begin(&stats->syncp); 880 stats->tx_packets++; 881 stats->tx_bytes += skb->len; 882 u64_stats_update_end(&stats->syncp); 883 884 return skb; 885 } 886 887 static void am65_cpsw_nuss_tx_wake(struct am65_cpsw_tx_chn *tx_chn, struct net_device *ndev, 888 struct netdev_queue *netif_txq) 889 { 890 if (netif_tx_queue_stopped(netif_txq)) { 891 /* Check whether the queue is stopped due to stalled 892 * tx dma, if the queue is stopped then wake the queue 893 * as we have free desc for tx 894 */ 895 __netif_tx_lock(netif_txq, smp_processor_id()); 896 if (netif_running(ndev) && 897 (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS)) 898 netif_tx_wake_queue(netif_txq); 899 900 __netif_tx_unlock(netif_txq); 901 } 902 } 903 904 static int am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common *common, 905 int chn, unsigned int budget) 906 { 907 struct device *dev = common->dev; 908 struct am65_cpsw_tx_chn *tx_chn; 909 struct netdev_queue *netif_txq; 910 unsigned int total_bytes = 0; 911 struct net_device *ndev; 912 struct sk_buff *skb; 913 dma_addr_t desc_dma; 914 int res, num_tx = 0; 915 916 tx_chn = &common->tx_chns[chn]; 917 918 while (true) { 919 spin_lock(&tx_chn->lock); 920 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma); 921 spin_unlock(&tx_chn->lock); 922 if (res == -ENODATA) 923 break; 924 925 if (cppi5_desc_is_tdcm(desc_dma)) { 926 if (atomic_dec_and_test(&common->tdown_cnt)) 927 complete(&common->tdown_complete); 928 break; 929 } 930 931 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma); 932 total_bytes = skb->len; 933 ndev = skb->dev; 934 napi_consume_skb(skb, budget); 935 num_tx++; 936 937 netif_txq = netdev_get_tx_queue(ndev, chn); 938 939 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes); 940 941 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq); 942 } 943 944 dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx); 945 946 return num_tx; 947 } 948 949 static int am65_cpsw_nuss_tx_compl_packets_2g(struct am65_cpsw_common *common, 950 int chn, unsigned int budget) 951 { 952 struct device *dev = common->dev; 953 struct am65_cpsw_tx_chn *tx_chn; 954 struct netdev_queue *netif_txq; 955 unsigned int total_bytes = 0; 956 struct net_device *ndev; 957 struct sk_buff *skb; 958 dma_addr_t desc_dma; 959 int res, num_tx = 0; 960 961 tx_chn = &common->tx_chns[chn]; 962 963 while (true) { 964 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma); 965 if (res == -ENODATA) 966 break; 967 968 if (cppi5_desc_is_tdcm(desc_dma)) { 969 if (atomic_dec_and_test(&common->tdown_cnt)) 970 complete(&common->tdown_complete); 971 break; 972 } 973 974 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma); 975 976 ndev = skb->dev; 977 total_bytes += skb->len; 978 napi_consume_skb(skb, budget); 979 num_tx++; 980 } 981 982 if (!num_tx) 983 return 0; 984 985 netif_txq = netdev_get_tx_queue(ndev, chn); 986 987 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes); 988 989 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq); 990 991 dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx); 992 993 return num_tx; 994 } 995 996 static int am65_cpsw_nuss_tx_poll(struct napi_struct *napi_tx, int budget) 997 { 998 struct am65_cpsw_tx_chn *tx_chn = am65_cpsw_napi_to_tx_chn(napi_tx); 999 int num_tx; 1000 1001 if (AM65_CPSW_IS_CPSW2G(tx_chn->common)) 1002 num_tx = am65_cpsw_nuss_tx_compl_packets_2g(tx_chn->common, tx_chn->id, budget); 1003 else 1004 num_tx = am65_cpsw_nuss_tx_compl_packets(tx_chn->common, tx_chn->id, budget); 1005 1006 if (num_tx >= budget) 1007 return budget; 1008 1009 if (napi_complete_done(napi_tx, num_tx)) 1010 enable_irq(tx_chn->irq); 1011 1012 return 0; 1013 } 1014 1015 static irqreturn_t am65_cpsw_nuss_rx_irq(int irq, void *dev_id) 1016 { 1017 struct am65_cpsw_common *common = dev_id; 1018 1019 common->rx_irq_disabled = true; 1020 disable_irq_nosync(irq); 1021 napi_schedule(&common->napi_rx); 1022 1023 return IRQ_HANDLED; 1024 } 1025 1026 static irqreturn_t am65_cpsw_nuss_tx_irq(int irq, void *dev_id) 1027 { 1028 struct am65_cpsw_tx_chn *tx_chn = dev_id; 1029 1030 disable_irq_nosync(irq); 1031 napi_schedule(&tx_chn->napi_tx); 1032 1033 return IRQ_HANDLED; 1034 } 1035 1036 static netdev_tx_t am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff *skb, 1037 struct net_device *ndev) 1038 { 1039 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 1040 struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc; 1041 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1042 struct device *dev = common->dev; 1043 struct am65_cpsw_tx_chn *tx_chn; 1044 struct netdev_queue *netif_txq; 1045 dma_addr_t desc_dma, buf_dma; 1046 int ret, q_idx, i; 1047 void **swdata; 1048 u32 *psdata; 1049 u32 pkt_len; 1050 1051 /* padding enabled in hw */ 1052 pkt_len = skb_headlen(skb); 1053 1054 /* SKB TX timestamp */ 1055 if (port->tx_ts_enabled) 1056 am65_cpts_prep_tx_timestamp(common->cpts, skb); 1057 1058 q_idx = skb_get_queue_mapping(skb); 1059 dev_dbg(dev, "%s skb_queue:%d\n", __func__, q_idx); 1060 1061 tx_chn = &common->tx_chns[q_idx]; 1062 netif_txq = netdev_get_tx_queue(ndev, q_idx); 1063 1064 /* Map the linear buffer */ 1065 buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len, 1066 DMA_TO_DEVICE); 1067 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) { 1068 dev_err(dev, "Failed to map tx skb buffer\n"); 1069 ndev->stats.tx_errors++; 1070 goto err_free_skb; 1071 } 1072 1073 first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool); 1074 if (!first_desc) { 1075 dev_dbg(dev, "Failed to allocate descriptor\n"); 1076 dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, 1077 DMA_TO_DEVICE); 1078 goto busy_stop_q; 1079 } 1080 1081 cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT, 1082 AM65_CPSW_NAV_PS_DATA_SIZE); 1083 cppi5_desc_set_pktids(&first_desc->hdr, 0, 0x3FFF); 1084 cppi5_hdesc_set_pkttype(first_desc, 0x7); 1085 cppi5_desc_set_tags_ids(&first_desc->hdr, 0, port->port_id); 1086 1087 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma); 1088 cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len); 1089 swdata = cppi5_hdesc_get_swdata(first_desc); 1090 *(swdata) = skb; 1091 psdata = cppi5_hdesc_get_psdata(first_desc); 1092 1093 /* HW csum offload if enabled */ 1094 psdata[2] = 0; 1095 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { 1096 unsigned int cs_start, cs_offset; 1097 1098 cs_start = skb_transport_offset(skb); 1099 cs_offset = cs_start + skb->csum_offset; 1100 /* HW numerates bytes starting from 1 */ 1101 psdata[2] = ((cs_offset + 1) << 24) | 1102 ((cs_start + 1) << 16) | (skb->len - cs_start); 1103 dev_dbg(dev, "%s tx psdata:%#x\n", __func__, psdata[2]); 1104 } 1105 1106 if (!skb_is_nonlinear(skb)) 1107 goto done_tx; 1108 1109 dev_dbg(dev, "fragmented SKB\n"); 1110 1111 /* Handle the case where skb is fragmented in pages */ 1112 cur_desc = first_desc; 1113 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1114 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1115 u32 frag_size = skb_frag_size(frag); 1116 1117 next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool); 1118 if (!next_desc) { 1119 dev_err(dev, "Failed to allocate descriptor\n"); 1120 goto busy_free_descs; 1121 } 1122 1123 buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size, 1124 DMA_TO_DEVICE); 1125 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) { 1126 dev_err(dev, "Failed to map tx skb page\n"); 1127 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc); 1128 ndev->stats.tx_errors++; 1129 goto err_free_descs; 1130 } 1131 1132 cppi5_hdesc_reset_hbdesc(next_desc); 1133 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma); 1134 cppi5_hdesc_attach_buf(next_desc, 1135 buf_dma, frag_size, buf_dma, frag_size); 1136 1137 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, 1138 next_desc); 1139 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma); 1140 cppi5_hdesc_link_hbdesc(cur_desc, desc_dma); 1141 1142 pkt_len += frag_size; 1143 cur_desc = next_desc; 1144 } 1145 WARN_ON(pkt_len != skb->len); 1146 1147 done_tx: 1148 skb_tx_timestamp(skb); 1149 1150 /* report bql before sending packet */ 1151 netdev_tx_sent_queue(netif_txq, pkt_len); 1152 1153 cppi5_hdesc_set_pktlen(first_desc, pkt_len); 1154 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc); 1155 if (AM65_CPSW_IS_CPSW2G(common)) { 1156 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma); 1157 } else { 1158 spin_lock_bh(&tx_chn->lock); 1159 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma); 1160 spin_unlock_bh(&tx_chn->lock); 1161 } 1162 if (ret) { 1163 dev_err(dev, "can't push desc %d\n", ret); 1164 /* inform bql */ 1165 netdev_tx_completed_queue(netif_txq, 1, pkt_len); 1166 ndev->stats.tx_errors++; 1167 goto err_free_descs; 1168 } 1169 1170 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) { 1171 netif_tx_stop_queue(netif_txq); 1172 /* Barrier, so that stop_queue visible to other cpus */ 1173 smp_mb__after_atomic(); 1174 dev_dbg(dev, "netif_tx_stop_queue %d\n", q_idx); 1175 1176 /* re-check for smp */ 1177 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= 1178 MAX_SKB_FRAGS) { 1179 netif_tx_wake_queue(netif_txq); 1180 dev_dbg(dev, "netif_tx_wake_queue %d\n", q_idx); 1181 } 1182 } 1183 1184 return NETDEV_TX_OK; 1185 1186 err_free_descs: 1187 am65_cpsw_nuss_xmit_free(tx_chn, first_desc); 1188 err_free_skb: 1189 ndev->stats.tx_dropped++; 1190 dev_kfree_skb_any(skb); 1191 return NETDEV_TX_OK; 1192 1193 busy_free_descs: 1194 am65_cpsw_nuss_xmit_free(tx_chn, first_desc); 1195 busy_stop_q: 1196 netif_tx_stop_queue(netif_txq); 1197 return NETDEV_TX_BUSY; 1198 } 1199 1200 static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev, 1201 void *addr) 1202 { 1203 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 1204 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1205 struct sockaddr *sockaddr = (struct sockaddr *)addr; 1206 int ret; 1207 1208 ret = eth_prepare_mac_addr_change(ndev, addr); 1209 if (ret < 0) 1210 return ret; 1211 1212 ret = pm_runtime_resume_and_get(common->dev); 1213 if (ret < 0) 1214 return ret; 1215 1216 cpsw_ale_del_ucast(common->ale, ndev->dev_addr, 1217 HOST_PORT_NUM, 0, 0); 1218 cpsw_ale_add_ucast(common->ale, sockaddr->sa_data, 1219 HOST_PORT_NUM, ALE_SECURE, 0); 1220 1221 am65_cpsw_port_set_sl_mac(port, addr); 1222 eth_commit_mac_addr_change(ndev, sockaddr); 1223 1224 pm_runtime_put(common->dev); 1225 1226 return 0; 1227 } 1228 1229 static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, 1230 struct ifreq *ifr) 1231 { 1232 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 1233 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1234 u32 ts_ctrl, seq_id, ts_ctrl_ltype2, ts_vlan_ltype; 1235 struct hwtstamp_config cfg; 1236 1237 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS)) 1238 return -EOPNOTSUPP; 1239 1240 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 1241 return -EFAULT; 1242 1243 /* TX HW timestamp */ 1244 switch (cfg.tx_type) { 1245 case HWTSTAMP_TX_OFF: 1246 case HWTSTAMP_TX_ON: 1247 break; 1248 default: 1249 return -ERANGE; 1250 } 1251 1252 switch (cfg.rx_filter) { 1253 case HWTSTAMP_FILTER_NONE: 1254 port->rx_ts_enabled = false; 1255 break; 1256 case HWTSTAMP_FILTER_ALL: 1257 case HWTSTAMP_FILTER_SOME: 1258 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 1259 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 1260 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 1261 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 1262 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 1263 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 1264 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 1265 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 1266 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 1267 case HWTSTAMP_FILTER_PTP_V2_EVENT: 1268 case HWTSTAMP_FILTER_PTP_V2_SYNC: 1269 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 1270 case HWTSTAMP_FILTER_NTP_ALL: 1271 port->rx_ts_enabled = true; 1272 cfg.rx_filter = HWTSTAMP_FILTER_ALL; 1273 break; 1274 default: 1275 return -ERANGE; 1276 } 1277 1278 port->tx_ts_enabled = (cfg.tx_type == HWTSTAMP_TX_ON); 1279 1280 /* cfg TX timestamp */ 1281 seq_id = (AM65_CPSW_TS_SEQ_ID_OFFSET << 1282 AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT) | ETH_P_1588; 1283 1284 ts_vlan_ltype = ETH_P_8021Q; 1285 1286 ts_ctrl_ltype2 = ETH_P_1588 | 1287 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 | 1288 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 | 1289 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 | 1290 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 | 1291 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 | 1292 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 | 1293 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 | 1294 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO; 1295 1296 ts_ctrl = AM65_CPSW_TS_EVENT_MSG_TYPE_BITS << 1297 AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT; 1298 1299 if (port->tx_ts_enabled) 1300 ts_ctrl |= AM65_CPSW_TS_TX_ANX_ALL_EN | 1301 AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN; 1302 1303 writel(seq_id, port->port_base + AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG); 1304 writel(ts_vlan_ltype, port->port_base + 1305 AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG); 1306 writel(ts_ctrl_ltype2, port->port_base + 1307 AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2); 1308 writel(ts_ctrl, port->port_base + AM65_CPSW_PORTN_REG_TS_CTL); 1309 1310 /* en/dis RX timestamp */ 1311 am65_cpts_rx_enable(common->cpts, port->rx_ts_enabled); 1312 1313 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; 1314 } 1315 1316 static int am65_cpsw_nuss_hwtstamp_get(struct net_device *ndev, 1317 struct ifreq *ifr) 1318 { 1319 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1320 struct hwtstamp_config cfg; 1321 1322 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS)) 1323 return -EOPNOTSUPP; 1324 1325 cfg.flags = 0; 1326 cfg.tx_type = port->tx_ts_enabled ? 1327 HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; 1328 cfg.rx_filter = port->rx_ts_enabled ? 1329 HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE; 1330 1331 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; 1332 } 1333 1334 static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev, 1335 struct ifreq *req, int cmd) 1336 { 1337 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1338 1339 if (!netif_running(ndev)) 1340 return -EINVAL; 1341 1342 switch (cmd) { 1343 case SIOCSHWTSTAMP: 1344 return am65_cpsw_nuss_hwtstamp_set(ndev, req); 1345 case SIOCGHWTSTAMP: 1346 return am65_cpsw_nuss_hwtstamp_get(ndev, req); 1347 } 1348 1349 return phylink_mii_ioctl(port->slave.phylink, req, cmd); 1350 } 1351 1352 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev, 1353 struct rtnl_link_stats64 *stats) 1354 { 1355 struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev); 1356 unsigned int start; 1357 int cpu; 1358 1359 for_each_possible_cpu(cpu) { 1360 struct am65_cpsw_ndev_stats *cpu_stats; 1361 u64 rx_packets; 1362 u64 rx_bytes; 1363 u64 tx_packets; 1364 u64 tx_bytes; 1365 1366 cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu); 1367 do { 1368 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1369 rx_packets = cpu_stats->rx_packets; 1370 rx_bytes = cpu_stats->rx_bytes; 1371 tx_packets = cpu_stats->tx_packets; 1372 tx_bytes = cpu_stats->tx_bytes; 1373 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1374 1375 stats->rx_packets += rx_packets; 1376 stats->rx_bytes += rx_bytes; 1377 stats->tx_packets += tx_packets; 1378 stats->tx_bytes += tx_bytes; 1379 } 1380 1381 stats->rx_errors = dev->stats.rx_errors; 1382 stats->rx_dropped = dev->stats.rx_dropped; 1383 stats->tx_dropped = dev->stats.tx_dropped; 1384 } 1385 1386 static struct devlink_port *am65_cpsw_ndo_get_devlink_port(struct net_device *ndev) 1387 { 1388 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 1389 1390 return &port->devlink_port; 1391 } 1392 1393 static const struct net_device_ops am65_cpsw_nuss_netdev_ops = { 1394 .ndo_open = am65_cpsw_nuss_ndo_slave_open, 1395 .ndo_stop = am65_cpsw_nuss_ndo_slave_stop, 1396 .ndo_start_xmit = am65_cpsw_nuss_ndo_slave_xmit, 1397 .ndo_set_rx_mode = am65_cpsw_nuss_ndo_slave_set_rx_mode, 1398 .ndo_get_stats64 = am65_cpsw_nuss_ndo_get_stats, 1399 .ndo_validate_addr = eth_validate_addr, 1400 .ndo_set_mac_address = am65_cpsw_nuss_ndo_slave_set_mac_address, 1401 .ndo_tx_timeout = am65_cpsw_nuss_ndo_host_tx_timeout, 1402 .ndo_vlan_rx_add_vid = am65_cpsw_nuss_ndo_slave_add_vid, 1403 .ndo_vlan_rx_kill_vid = am65_cpsw_nuss_ndo_slave_kill_vid, 1404 .ndo_eth_ioctl = am65_cpsw_nuss_ndo_slave_ioctl, 1405 .ndo_setup_tc = am65_cpsw_qos_ndo_setup_tc, 1406 .ndo_get_devlink_port = am65_cpsw_ndo_get_devlink_port, 1407 }; 1408 1409 static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode, 1410 const struct phylink_link_state *state) 1411 { 1412 /* Currently not used */ 1413 } 1414 1415 static void am65_cpsw_nuss_mac_link_down(struct phylink_config *config, unsigned int mode, 1416 phy_interface_t interface) 1417 { 1418 struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data, 1419 phylink_config); 1420 struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave); 1421 struct am65_cpsw_common *common = port->common; 1422 struct net_device *ndev = port->ndev; 1423 int tmo; 1424 1425 /* disable forwarding */ 1426 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 1427 1428 cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE); 1429 1430 tmo = cpsw_sl_wait_for_idle(port->slave.mac_sl, 100); 1431 dev_dbg(common->dev, "down msc_sl %08x tmo %d\n", 1432 cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_MACSTATUS), tmo); 1433 1434 cpsw_sl_ctl_reset(port->slave.mac_sl); 1435 1436 am65_cpsw_qos_link_down(ndev); 1437 netif_tx_stop_all_queues(ndev); 1438 } 1439 1440 static void am65_cpsw_nuss_mac_link_up(struct phylink_config *config, struct phy_device *phy, 1441 unsigned int mode, phy_interface_t interface, int speed, 1442 int duplex, bool tx_pause, bool rx_pause) 1443 { 1444 struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data, 1445 phylink_config); 1446 struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave); 1447 struct am65_cpsw_common *common = port->common; 1448 u32 mac_control = CPSW_SL_CTL_GMII_EN; 1449 struct net_device *ndev = port->ndev; 1450 1451 if (speed == SPEED_1000) 1452 mac_control |= CPSW_SL_CTL_GIG; 1453 if (speed == SPEED_10 && interface == PHY_INTERFACE_MODE_RGMII) 1454 /* Can be used with in band mode only */ 1455 mac_control |= CPSW_SL_CTL_EXT_EN; 1456 if (speed == SPEED_100 && interface == PHY_INTERFACE_MODE_RMII) 1457 mac_control |= CPSW_SL_CTL_IFCTL_A; 1458 if (duplex) 1459 mac_control |= CPSW_SL_CTL_FULLDUPLEX; 1460 1461 /* rx_pause/tx_pause */ 1462 if (rx_pause) 1463 mac_control |= CPSW_SL_CTL_RX_FLOW_EN; 1464 1465 if (tx_pause) 1466 mac_control |= CPSW_SL_CTL_TX_FLOW_EN; 1467 1468 cpsw_sl_ctl_set(port->slave.mac_sl, mac_control); 1469 1470 /* enable forwarding */ 1471 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_FORWARD); 1472 1473 am65_cpsw_qos_link_up(ndev, speed); 1474 netif_tx_wake_all_queues(ndev); 1475 } 1476 1477 static const struct phylink_mac_ops am65_cpsw_phylink_mac_ops = { 1478 .validate = phylink_generic_validate, 1479 .mac_config = am65_cpsw_nuss_mac_config, 1480 .mac_link_down = am65_cpsw_nuss_mac_link_down, 1481 .mac_link_up = am65_cpsw_nuss_mac_link_up, 1482 }; 1483 1484 static void am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port *port) 1485 { 1486 struct am65_cpsw_common *common = port->common; 1487 1488 if (!port->disabled) 1489 return; 1490 1491 cpsw_ale_control_set(common->ale, port->port_id, 1492 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE); 1493 1494 cpsw_sl_reset(port->slave.mac_sl, 100); 1495 cpsw_sl_ctl_reset(port->slave.mac_sl); 1496 } 1497 1498 static void am65_cpsw_nuss_free_tx_chns(void *data) 1499 { 1500 struct am65_cpsw_common *common = data; 1501 int i; 1502 1503 for (i = 0; i < common->tx_ch_num; i++) { 1504 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i]; 1505 1506 if (!IS_ERR_OR_NULL(tx_chn->desc_pool)) 1507 k3_cppi_desc_pool_destroy(tx_chn->desc_pool); 1508 1509 if (!IS_ERR_OR_NULL(tx_chn->tx_chn)) 1510 k3_udma_glue_release_tx_chn(tx_chn->tx_chn); 1511 1512 memset(tx_chn, 0, sizeof(*tx_chn)); 1513 } 1514 } 1515 1516 void am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common *common) 1517 { 1518 struct device *dev = common->dev; 1519 int i; 1520 1521 devm_remove_action(dev, am65_cpsw_nuss_free_tx_chns, common); 1522 1523 for (i = 0; i < common->tx_ch_num; i++) { 1524 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i]; 1525 1526 if (tx_chn->irq) 1527 devm_free_irq(dev, tx_chn->irq, tx_chn); 1528 1529 netif_napi_del(&tx_chn->napi_tx); 1530 1531 if (!IS_ERR_OR_NULL(tx_chn->desc_pool)) 1532 k3_cppi_desc_pool_destroy(tx_chn->desc_pool); 1533 1534 if (!IS_ERR_OR_NULL(tx_chn->tx_chn)) 1535 k3_udma_glue_release_tx_chn(tx_chn->tx_chn); 1536 1537 memset(tx_chn, 0, sizeof(*tx_chn)); 1538 } 1539 } 1540 1541 static int am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common *common) 1542 { 1543 u32 max_desc_num = ALIGN(AM65_CPSW_MAX_TX_DESC, MAX_SKB_FRAGS); 1544 struct k3_udma_glue_tx_channel_cfg tx_cfg = { 0 }; 1545 struct device *dev = common->dev; 1546 struct k3_ring_cfg ring_cfg = { 1547 .elm_size = K3_RINGACC_RING_ELSIZE_8, 1548 .mode = K3_RINGACC_RING_MODE_RING, 1549 .flags = 0 1550 }; 1551 u32 hdesc_size; 1552 int i, ret = 0; 1553 1554 hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE, 1555 AM65_CPSW_NAV_SW_DATA_SIZE); 1556 1557 tx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE; 1558 tx_cfg.tx_cfg = ring_cfg; 1559 tx_cfg.txcq_cfg = ring_cfg; 1560 tx_cfg.tx_cfg.size = max_desc_num; 1561 tx_cfg.txcq_cfg.size = max_desc_num; 1562 1563 for (i = 0; i < common->tx_ch_num; i++) { 1564 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i]; 1565 1566 snprintf(tx_chn->tx_chn_name, 1567 sizeof(tx_chn->tx_chn_name), "tx%d", i); 1568 1569 spin_lock_init(&tx_chn->lock); 1570 tx_chn->common = common; 1571 tx_chn->id = i; 1572 tx_chn->descs_num = max_desc_num; 1573 1574 tx_chn->tx_chn = 1575 k3_udma_glue_request_tx_chn(dev, 1576 tx_chn->tx_chn_name, 1577 &tx_cfg); 1578 if (IS_ERR(tx_chn->tx_chn)) { 1579 ret = dev_err_probe(dev, PTR_ERR(tx_chn->tx_chn), 1580 "Failed to request tx dma channel\n"); 1581 goto err; 1582 } 1583 tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn); 1584 1585 tx_chn->desc_pool = k3_cppi_desc_pool_create_name(tx_chn->dma_dev, 1586 tx_chn->descs_num, 1587 hdesc_size, 1588 tx_chn->tx_chn_name); 1589 if (IS_ERR(tx_chn->desc_pool)) { 1590 ret = PTR_ERR(tx_chn->desc_pool); 1591 dev_err(dev, "Failed to create poll %d\n", ret); 1592 goto err; 1593 } 1594 1595 tx_chn->irq = k3_udma_glue_tx_get_irq(tx_chn->tx_chn); 1596 if (tx_chn->irq <= 0) { 1597 dev_err(dev, "Failed to get tx dma irq %d\n", 1598 tx_chn->irq); 1599 goto err; 1600 } 1601 1602 snprintf(tx_chn->tx_chn_name, 1603 sizeof(tx_chn->tx_chn_name), "%s-tx%d", 1604 dev_name(dev), tx_chn->id); 1605 } 1606 1607 err: 1608 i = devm_add_action(dev, am65_cpsw_nuss_free_tx_chns, common); 1609 if (i) { 1610 dev_err(dev, "Failed to add free_tx_chns action %d\n", i); 1611 return i; 1612 } 1613 1614 return ret; 1615 } 1616 1617 static void am65_cpsw_nuss_free_rx_chns(void *data) 1618 { 1619 struct am65_cpsw_common *common = data; 1620 struct am65_cpsw_rx_chn *rx_chn; 1621 1622 rx_chn = &common->rx_chns; 1623 1624 if (!IS_ERR_OR_NULL(rx_chn->desc_pool)) 1625 k3_cppi_desc_pool_destroy(rx_chn->desc_pool); 1626 1627 if (!IS_ERR_OR_NULL(rx_chn->rx_chn)) 1628 k3_udma_glue_release_rx_chn(rx_chn->rx_chn); 1629 } 1630 1631 static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common) 1632 { 1633 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns; 1634 struct k3_udma_glue_rx_channel_cfg rx_cfg = { 0 }; 1635 u32 max_desc_num = AM65_CPSW_MAX_RX_DESC; 1636 struct device *dev = common->dev; 1637 u32 hdesc_size; 1638 u32 fdqring_id; 1639 int i, ret = 0; 1640 1641 hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE, 1642 AM65_CPSW_NAV_SW_DATA_SIZE); 1643 1644 rx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE; 1645 rx_cfg.flow_id_num = AM65_CPSW_MAX_RX_FLOWS; 1646 rx_cfg.flow_id_base = common->rx_flow_id_base; 1647 1648 /* init all flows */ 1649 rx_chn->dev = dev; 1650 rx_chn->descs_num = max_desc_num; 1651 1652 rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, "rx", &rx_cfg); 1653 if (IS_ERR(rx_chn->rx_chn)) { 1654 ret = dev_err_probe(dev, PTR_ERR(rx_chn->rx_chn), 1655 "Failed to request rx dma channel\n"); 1656 goto err; 1657 } 1658 rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn); 1659 1660 rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev, 1661 rx_chn->descs_num, 1662 hdesc_size, "rx"); 1663 if (IS_ERR(rx_chn->desc_pool)) { 1664 ret = PTR_ERR(rx_chn->desc_pool); 1665 dev_err(dev, "Failed to create rx poll %d\n", ret); 1666 goto err; 1667 } 1668 1669 common->rx_flow_id_base = 1670 k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn); 1671 dev_info(dev, "set new flow-id-base %u\n", common->rx_flow_id_base); 1672 1673 fdqring_id = K3_RINGACC_RING_ID_ANY; 1674 for (i = 0; i < rx_cfg.flow_id_num; i++) { 1675 struct k3_ring_cfg rxring_cfg = { 1676 .elm_size = K3_RINGACC_RING_ELSIZE_8, 1677 .mode = K3_RINGACC_RING_MODE_RING, 1678 .flags = 0, 1679 }; 1680 struct k3_ring_cfg fdqring_cfg = { 1681 .elm_size = K3_RINGACC_RING_ELSIZE_8, 1682 .flags = K3_RINGACC_RING_SHARED, 1683 }; 1684 struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = { 1685 .rx_cfg = rxring_cfg, 1686 .rxfdq_cfg = fdqring_cfg, 1687 .ring_rxq_id = K3_RINGACC_RING_ID_ANY, 1688 .src_tag_lo_sel = 1689 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG, 1690 }; 1691 1692 rx_flow_cfg.ring_rxfdq0_id = fdqring_id; 1693 rx_flow_cfg.rx_cfg.size = max_desc_num; 1694 rx_flow_cfg.rxfdq_cfg.size = max_desc_num; 1695 rx_flow_cfg.rxfdq_cfg.mode = common->pdata.fdqring_mode; 1696 1697 ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn, 1698 i, &rx_flow_cfg); 1699 if (ret) { 1700 dev_err(dev, "Failed to init rx flow%d %d\n", i, ret); 1701 goto err; 1702 } 1703 if (!i) 1704 fdqring_id = 1705 k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn, 1706 i); 1707 1708 rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i); 1709 1710 if (rx_chn->irq <= 0) { 1711 dev_err(dev, "Failed to get rx dma irq %d\n", 1712 rx_chn->irq); 1713 ret = -ENXIO; 1714 goto err; 1715 } 1716 } 1717 1718 err: 1719 i = devm_add_action(dev, am65_cpsw_nuss_free_rx_chns, common); 1720 if (i) { 1721 dev_err(dev, "Failed to add free_rx_chns action %d\n", i); 1722 return i; 1723 } 1724 1725 return ret; 1726 } 1727 1728 static int am65_cpsw_nuss_init_host_p(struct am65_cpsw_common *common) 1729 { 1730 struct am65_cpsw_host *host_p = am65_common_get_host(common); 1731 1732 host_p->common = common; 1733 host_p->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE; 1734 host_p->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE; 1735 1736 return 0; 1737 } 1738 1739 static int am65_cpsw_am654_get_efuse_macid(struct device_node *of_node, 1740 int slave, u8 *mac_addr) 1741 { 1742 u32 mac_lo, mac_hi, offset; 1743 struct regmap *syscon; 1744 int ret; 1745 1746 syscon = syscon_regmap_lookup_by_phandle(of_node, "ti,syscon-efuse"); 1747 if (IS_ERR(syscon)) { 1748 if (PTR_ERR(syscon) == -ENODEV) 1749 return 0; 1750 return PTR_ERR(syscon); 1751 } 1752 1753 ret = of_property_read_u32_index(of_node, "ti,syscon-efuse", 1, 1754 &offset); 1755 if (ret) 1756 return ret; 1757 1758 regmap_read(syscon, offset, &mac_lo); 1759 regmap_read(syscon, offset + 4, &mac_hi); 1760 1761 mac_addr[0] = (mac_hi >> 8) & 0xff; 1762 mac_addr[1] = mac_hi & 0xff; 1763 mac_addr[2] = (mac_lo >> 24) & 0xff; 1764 mac_addr[3] = (mac_lo >> 16) & 0xff; 1765 mac_addr[4] = (mac_lo >> 8) & 0xff; 1766 mac_addr[5] = mac_lo & 0xff; 1767 1768 return 0; 1769 } 1770 1771 static int am65_cpsw_init_cpts(struct am65_cpsw_common *common) 1772 { 1773 struct device *dev = common->dev; 1774 struct device_node *node; 1775 struct am65_cpts *cpts; 1776 void __iomem *reg_base; 1777 1778 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS)) 1779 return 0; 1780 1781 node = of_get_child_by_name(dev->of_node, "cpts"); 1782 if (!node) { 1783 dev_err(dev, "%s cpts not found\n", __func__); 1784 return -ENOENT; 1785 } 1786 1787 reg_base = common->cpsw_base + AM65_CPSW_NU_CPTS_BASE; 1788 cpts = am65_cpts_create(dev, reg_base, node); 1789 if (IS_ERR(cpts)) { 1790 int ret = PTR_ERR(cpts); 1791 1792 of_node_put(node); 1793 if (ret == -EOPNOTSUPP) { 1794 dev_info(dev, "cpts disabled\n"); 1795 return 0; 1796 } 1797 1798 dev_err(dev, "cpts create err %d\n", ret); 1799 return ret; 1800 } 1801 common->cpts = cpts; 1802 /* Forbid PM runtime if CPTS is running. 1803 * K3 CPSWxG modules may completely lose context during ON->OFF 1804 * transitions depending on integration. 1805 * AM65x/J721E MCU CPSW2G: false 1806 * J721E MAIN_CPSW9G: true 1807 */ 1808 pm_runtime_forbid(dev); 1809 1810 return 0; 1811 } 1812 1813 static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common) 1814 { 1815 struct device_node *node, *port_np; 1816 struct device *dev = common->dev; 1817 int ret; 1818 1819 node = of_get_child_by_name(dev->of_node, "ethernet-ports"); 1820 if (!node) 1821 return -ENOENT; 1822 1823 for_each_child_of_node(node, port_np) { 1824 struct am65_cpsw_port *port; 1825 u32 port_id; 1826 1827 /* it is not a slave port node, continue */ 1828 if (strcmp(port_np->name, "port")) 1829 continue; 1830 1831 ret = of_property_read_u32(port_np, "reg", &port_id); 1832 if (ret < 0) { 1833 dev_err(dev, "%pOF error reading port_id %d\n", 1834 port_np, ret); 1835 goto of_node_put; 1836 } 1837 1838 if (!port_id || port_id > common->port_num) { 1839 dev_err(dev, "%pOF has invalid port_id %u %s\n", 1840 port_np, port_id, port_np->name); 1841 ret = -EINVAL; 1842 goto of_node_put; 1843 } 1844 1845 port = am65_common_get_port(common, port_id); 1846 port->port_id = port_id; 1847 port->common = common; 1848 port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE + 1849 AM65_CPSW_NU_PORTS_OFFSET * (port_id); 1850 port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE + 1851 (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id); 1852 port->name = of_get_property(port_np, "label", NULL); 1853 port->fetch_ram_base = 1854 common->cpsw_base + AM65_CPSW_NU_FRAM_BASE + 1855 (AM65_CPSW_NU_FRAM_PORT_OFFSET * (port_id - 1)); 1856 1857 port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base); 1858 if (IS_ERR(port->slave.mac_sl)) { 1859 ret = PTR_ERR(port->slave.mac_sl); 1860 goto of_node_put; 1861 } 1862 1863 port->disabled = !of_device_is_available(port_np); 1864 if (port->disabled) { 1865 common->disabled_ports_mask |= BIT(port->port_id); 1866 continue; 1867 } 1868 1869 port->slave.ifphy = devm_of_phy_get(dev, port_np, NULL); 1870 if (IS_ERR(port->slave.ifphy)) { 1871 ret = PTR_ERR(port->slave.ifphy); 1872 dev_err(dev, "%pOF error retrieving port phy: %d\n", 1873 port_np, ret); 1874 goto of_node_put; 1875 } 1876 1877 port->slave.mac_only = 1878 of_property_read_bool(port_np, "ti,mac-only"); 1879 1880 /* get phy/link info */ 1881 port->slave.phy_node = port_np; 1882 ret = of_get_phy_mode(port_np, &port->slave.phy_if); 1883 if (ret) { 1884 dev_err(dev, "%pOF read phy-mode err %d\n", 1885 port_np, ret); 1886 goto of_node_put; 1887 } 1888 1889 ret = of_get_mac_address(port_np, port->slave.mac_addr); 1890 if (ret) { 1891 am65_cpsw_am654_get_efuse_macid(port_np, 1892 port->port_id, 1893 port->slave.mac_addr); 1894 if (!is_valid_ether_addr(port->slave.mac_addr)) { 1895 eth_random_addr(port->slave.mac_addr); 1896 dev_err(dev, "Use random MAC address\n"); 1897 } 1898 } 1899 } 1900 of_node_put(node); 1901 1902 /* is there at least one ext.port */ 1903 if (!(~common->disabled_ports_mask & GENMASK(common->port_num, 1))) { 1904 dev_err(dev, "No Ext. port are available\n"); 1905 return -ENODEV; 1906 } 1907 1908 return 0; 1909 1910 of_node_put: 1911 of_node_put(port_np); 1912 of_node_put(node); 1913 return ret; 1914 } 1915 1916 static void am65_cpsw_pcpu_stats_free(void *data) 1917 { 1918 struct am65_cpsw_ndev_stats __percpu *stats = data; 1919 1920 free_percpu(stats); 1921 } 1922 1923 static void am65_cpsw_nuss_phylink_cleanup(struct am65_cpsw_common *common) 1924 { 1925 struct am65_cpsw_port *port; 1926 int i; 1927 1928 for (i = 0; i < common->port_num; i++) { 1929 port = &common->ports[i]; 1930 if (port->slave.phylink) 1931 phylink_destroy(port->slave.phylink); 1932 } 1933 } 1934 1935 static int 1936 am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx) 1937 { 1938 struct am65_cpsw_ndev_priv *ndev_priv; 1939 struct device *dev = common->dev; 1940 struct am65_cpsw_port *port; 1941 struct phylink *phylink; 1942 int ret; 1943 1944 port = &common->ports[port_idx]; 1945 1946 if (port->disabled) 1947 return 0; 1948 1949 /* alloc netdev */ 1950 port->ndev = devm_alloc_etherdev_mqs(common->dev, 1951 sizeof(struct am65_cpsw_ndev_priv), 1952 AM65_CPSW_MAX_TX_QUEUES, 1953 AM65_CPSW_MAX_RX_QUEUES); 1954 if (!port->ndev) { 1955 dev_err(dev, "error allocating slave net_device %u\n", 1956 port->port_id); 1957 return -ENOMEM; 1958 } 1959 1960 ndev_priv = netdev_priv(port->ndev); 1961 ndev_priv->port = port; 1962 ndev_priv->msg_enable = AM65_CPSW_DEBUG; 1963 SET_NETDEV_DEV(port->ndev, dev); 1964 1965 eth_hw_addr_set(port->ndev, port->slave.mac_addr); 1966 1967 port->ndev->min_mtu = AM65_CPSW_MIN_PACKET_SIZE; 1968 port->ndev->max_mtu = AM65_CPSW_MAX_PACKET_SIZE; 1969 port->ndev->hw_features = NETIF_F_SG | 1970 NETIF_F_RXCSUM | 1971 NETIF_F_HW_CSUM | 1972 NETIF_F_HW_TC; 1973 port->ndev->features = port->ndev->hw_features | 1974 NETIF_F_HW_VLAN_CTAG_FILTER; 1975 port->ndev->vlan_features |= NETIF_F_SG; 1976 port->ndev->netdev_ops = &am65_cpsw_nuss_netdev_ops; 1977 port->ndev->ethtool_ops = &am65_cpsw_ethtool_ops_slave; 1978 1979 /* Configuring Phylink */ 1980 port->slave.phylink_config.dev = &port->ndev->dev; 1981 port->slave.phylink_config.type = PHYLINK_NETDEV; 1982 port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD; 1983 1984 phy_interface_set_rgmii(port->slave.phylink_config.supported_interfaces); 1985 1986 phylink = phylink_create(&port->slave.phylink_config, 1987 of_node_to_fwnode(port->slave.phy_node), 1988 port->slave.phy_if, 1989 &am65_cpsw_phylink_mac_ops); 1990 if (IS_ERR(phylink)) 1991 return PTR_ERR(phylink); 1992 1993 port->slave.phylink = phylink; 1994 1995 /* Disable TX checksum offload by default due to HW bug */ 1996 if (common->pdata.quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM) 1997 port->ndev->features &= ~NETIF_F_HW_CSUM; 1998 1999 ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats); 2000 if (!ndev_priv->stats) 2001 return -ENOMEM; 2002 2003 ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free, 2004 ndev_priv->stats); 2005 if (ret) 2006 dev_err(dev, "failed to add percpu stat free action %d\n", ret); 2007 2008 if (!common->dma_ndev) 2009 common->dma_ndev = port->ndev; 2010 2011 return ret; 2012 } 2013 2014 static int am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common *common) 2015 { 2016 int ret; 2017 int i; 2018 2019 for (i = 0; i < common->port_num; i++) { 2020 ret = am65_cpsw_nuss_init_port_ndev(common, i); 2021 if (ret) 2022 return ret; 2023 } 2024 2025 netif_napi_add(common->dma_ndev, &common->napi_rx, 2026 am65_cpsw_nuss_rx_poll, NAPI_POLL_WEIGHT); 2027 2028 return ret; 2029 } 2030 2031 static int am65_cpsw_nuss_ndev_add_tx_napi(struct am65_cpsw_common *common) 2032 { 2033 struct device *dev = common->dev; 2034 int i, ret = 0; 2035 2036 for (i = 0; i < common->tx_ch_num; i++) { 2037 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i]; 2038 2039 netif_napi_add_tx(common->dma_ndev, &tx_chn->napi_tx, 2040 am65_cpsw_nuss_tx_poll); 2041 2042 ret = devm_request_irq(dev, tx_chn->irq, 2043 am65_cpsw_nuss_tx_irq, 2044 IRQF_TRIGGER_HIGH, 2045 tx_chn->tx_chn_name, tx_chn); 2046 if (ret) { 2047 dev_err(dev, "failure requesting tx%u irq %u, %d\n", 2048 tx_chn->id, tx_chn->irq, ret); 2049 goto err; 2050 } 2051 } 2052 2053 err: 2054 return ret; 2055 } 2056 2057 static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common) 2058 { 2059 struct am65_cpsw_port *port; 2060 int i; 2061 2062 for (i = 0; i < common->port_num; i++) { 2063 port = &common->ports[i]; 2064 if (port->ndev) 2065 unregister_netdev(port->ndev); 2066 } 2067 } 2068 2069 static void am65_cpsw_port_offload_fwd_mark_update(struct am65_cpsw_common *common) 2070 { 2071 int set_val = 0; 2072 int i; 2073 2074 if (common->br_members == (GENMASK(common->port_num, 1) & ~common->disabled_ports_mask)) 2075 set_val = 1; 2076 2077 dev_dbg(common->dev, "set offload_fwd_mark %d\n", set_val); 2078 2079 for (i = 1; i <= common->port_num; i++) { 2080 struct am65_cpsw_port *port = am65_common_get_port(common, i); 2081 struct am65_cpsw_ndev_priv *priv; 2082 2083 if (!port->ndev) 2084 continue; 2085 2086 priv = am65_ndev_to_priv(port->ndev); 2087 priv->offload_fwd_mark = set_val; 2088 } 2089 } 2090 2091 bool am65_cpsw_port_dev_check(const struct net_device *ndev) 2092 { 2093 if (ndev->netdev_ops == &am65_cpsw_nuss_netdev_ops) { 2094 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 2095 2096 return !common->is_emac_mode; 2097 } 2098 2099 return false; 2100 } 2101 2102 static int am65_cpsw_netdevice_port_link(struct net_device *ndev, 2103 struct net_device *br_ndev, 2104 struct netlink_ext_ack *extack) 2105 { 2106 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 2107 struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev); 2108 int err; 2109 2110 if (!common->br_members) { 2111 common->hw_bridge_dev = br_ndev; 2112 } else { 2113 /* This is adding the port to a second bridge, this is 2114 * unsupported 2115 */ 2116 if (common->hw_bridge_dev != br_ndev) 2117 return -EOPNOTSUPP; 2118 } 2119 2120 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL, 2121 false, extack); 2122 if (err) 2123 return err; 2124 2125 common->br_members |= BIT(priv->port->port_id); 2126 2127 am65_cpsw_port_offload_fwd_mark_update(common); 2128 2129 return NOTIFY_DONE; 2130 } 2131 2132 static void am65_cpsw_netdevice_port_unlink(struct net_device *ndev) 2133 { 2134 struct am65_cpsw_common *common = am65_ndev_to_common(ndev); 2135 struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev); 2136 2137 switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL); 2138 2139 common->br_members &= ~BIT(priv->port->port_id); 2140 2141 am65_cpsw_port_offload_fwd_mark_update(common); 2142 2143 if (!common->br_members) 2144 common->hw_bridge_dev = NULL; 2145 } 2146 2147 /* netdev notifier */ 2148 static int am65_cpsw_netdevice_event(struct notifier_block *unused, 2149 unsigned long event, void *ptr) 2150 { 2151 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 2152 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 2153 struct netdev_notifier_changeupper_info *info; 2154 int ret = NOTIFY_DONE; 2155 2156 if (!am65_cpsw_port_dev_check(ndev)) 2157 return NOTIFY_DONE; 2158 2159 switch (event) { 2160 case NETDEV_CHANGEUPPER: 2161 info = ptr; 2162 2163 if (netif_is_bridge_master(info->upper_dev)) { 2164 if (info->linking) 2165 ret = am65_cpsw_netdevice_port_link(ndev, 2166 info->upper_dev, 2167 extack); 2168 else 2169 am65_cpsw_netdevice_port_unlink(ndev); 2170 } 2171 break; 2172 default: 2173 return NOTIFY_DONE; 2174 } 2175 2176 return notifier_from_errno(ret); 2177 } 2178 2179 static int am65_cpsw_register_notifiers(struct am65_cpsw_common *cpsw) 2180 { 2181 int ret = 0; 2182 2183 if (AM65_CPSW_IS_CPSW2G(cpsw) || 2184 !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) 2185 return 0; 2186 2187 cpsw->am65_cpsw_netdevice_nb.notifier_call = &am65_cpsw_netdevice_event; 2188 ret = register_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb); 2189 if (ret) { 2190 dev_err(cpsw->dev, "can't register netdevice notifier\n"); 2191 return ret; 2192 } 2193 2194 ret = am65_cpsw_switchdev_register_notifiers(cpsw); 2195 if (ret) 2196 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb); 2197 2198 return ret; 2199 } 2200 2201 static void am65_cpsw_unregister_notifiers(struct am65_cpsw_common *cpsw) 2202 { 2203 if (AM65_CPSW_IS_CPSW2G(cpsw) || 2204 !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) 2205 return; 2206 2207 am65_cpsw_switchdev_unregister_notifiers(cpsw); 2208 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb); 2209 } 2210 2211 static const struct devlink_ops am65_cpsw_devlink_ops = {}; 2212 2213 static void am65_cpsw_init_stp_ale_entry(struct am65_cpsw_common *cpsw) 2214 { 2215 cpsw_ale_add_mcast(cpsw->ale, eth_stp_addr, ALE_PORT_HOST, ALE_SUPER, 0, 2216 ALE_MCAST_BLOCK_LEARN_FWD); 2217 } 2218 2219 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common) 2220 { 2221 struct am65_cpsw_host *host = am65_common_get_host(common); 2222 2223 writel(common->default_vlan, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 2224 2225 am65_cpsw_init_stp_ale_entry(common); 2226 2227 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1); 2228 dev_dbg(common->dev, "Set P0_UNI_FLOOD\n"); 2229 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0); 2230 } 2231 2232 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common) 2233 { 2234 struct am65_cpsw_host *host = am65_common_get_host(common); 2235 2236 writel(0, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 2237 2238 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0); 2239 dev_dbg(common->dev, "unset P0_UNI_FLOOD\n"); 2240 2241 /* learning make no sense in multi-mac mode */ 2242 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1); 2243 } 2244 2245 static int am65_cpsw_dl_switch_mode_get(struct devlink *dl, u32 id, 2246 struct devlink_param_gset_ctx *ctx) 2247 { 2248 struct am65_cpsw_devlink *dl_priv = devlink_priv(dl); 2249 struct am65_cpsw_common *common = dl_priv->common; 2250 2251 dev_dbg(common->dev, "%s id:%u\n", __func__, id); 2252 2253 if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE) 2254 return -EOPNOTSUPP; 2255 2256 ctx->val.vbool = !common->is_emac_mode; 2257 2258 return 0; 2259 } 2260 2261 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port) 2262 { 2263 struct am65_cpsw_slave_data *slave = &port->slave; 2264 struct am65_cpsw_common *common = port->common; 2265 u32 port_mask; 2266 2267 writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 2268 2269 if (slave->mac_only) 2270 /* enable mac-only mode on port */ 2271 cpsw_ale_control_set(common->ale, port->port_id, 2272 ALE_PORT_MACONLY, 1); 2273 2274 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_NOLEARN, 1); 2275 2276 port_mask = BIT(port->port_id) | ALE_PORT_HOST; 2277 2278 cpsw_ale_add_ucast(common->ale, port->ndev->dev_addr, 2279 HOST_PORT_NUM, ALE_SECURE, slave->port_vlan); 2280 cpsw_ale_add_mcast(common->ale, port->ndev->broadcast, 2281 port_mask, ALE_VLAN, slave->port_vlan, ALE_MCAST_FWD_2); 2282 } 2283 2284 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port) 2285 { 2286 struct am65_cpsw_slave_data *slave = &port->slave; 2287 struct am65_cpsw_common *cpsw = port->common; 2288 u32 port_mask; 2289 2290 cpsw_ale_control_set(cpsw->ale, port->port_id, 2291 ALE_PORT_NOLEARN, 0); 2292 2293 cpsw_ale_add_ucast(cpsw->ale, port->ndev->dev_addr, 2294 HOST_PORT_NUM, ALE_SECURE | ALE_BLOCKED | ALE_VLAN, 2295 slave->port_vlan); 2296 2297 port_mask = BIT(port->port_id) | ALE_PORT_HOST; 2298 2299 cpsw_ale_add_mcast(cpsw->ale, port->ndev->broadcast, 2300 port_mask, ALE_VLAN, slave->port_vlan, 2301 ALE_MCAST_FWD_2); 2302 2303 writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 2304 2305 cpsw_ale_control_set(cpsw->ale, port->port_id, 2306 ALE_PORT_MACONLY, 0); 2307 } 2308 2309 static int am65_cpsw_dl_switch_mode_set(struct devlink *dl, u32 id, 2310 struct devlink_param_gset_ctx *ctx) 2311 { 2312 struct am65_cpsw_devlink *dl_priv = devlink_priv(dl); 2313 struct am65_cpsw_common *cpsw = dl_priv->common; 2314 bool switch_en = ctx->val.vbool; 2315 bool if_running = false; 2316 int i; 2317 2318 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id); 2319 2320 if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE) 2321 return -EOPNOTSUPP; 2322 2323 if (switch_en == !cpsw->is_emac_mode) 2324 return 0; 2325 2326 if (!switch_en && cpsw->br_members) { 2327 dev_err(cpsw->dev, "Remove ports from bridge before disabling switch mode\n"); 2328 return -EINVAL; 2329 } 2330 2331 rtnl_lock(); 2332 2333 cpsw->is_emac_mode = !switch_en; 2334 2335 for (i = 0; i < cpsw->port_num; i++) { 2336 struct net_device *sl_ndev = cpsw->ports[i].ndev; 2337 2338 if (!sl_ndev || !netif_running(sl_ndev)) 2339 continue; 2340 2341 if_running = true; 2342 } 2343 2344 if (!if_running) { 2345 /* all ndevs are down */ 2346 for (i = 0; i < cpsw->port_num; i++) { 2347 struct net_device *sl_ndev = cpsw->ports[i].ndev; 2348 struct am65_cpsw_slave_data *slave; 2349 2350 if (!sl_ndev) 2351 continue; 2352 2353 slave = am65_ndev_to_slave(sl_ndev); 2354 if (switch_en) 2355 slave->port_vlan = cpsw->default_vlan; 2356 else 2357 slave->port_vlan = 0; 2358 } 2359 2360 goto exit; 2361 } 2362 2363 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1); 2364 /* clean up ALE table */ 2365 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_CLEAR, 1); 2366 cpsw_ale_control_get(cpsw->ale, HOST_PORT_NUM, ALE_AGEOUT); 2367 2368 if (switch_en) { 2369 dev_info(cpsw->dev, "Enable switch mode\n"); 2370 2371 am65_cpsw_init_host_port_switch(cpsw); 2372 2373 for (i = 0; i < cpsw->port_num; i++) { 2374 struct net_device *sl_ndev = cpsw->ports[i].ndev; 2375 struct am65_cpsw_slave_data *slave; 2376 struct am65_cpsw_port *port; 2377 2378 if (!sl_ndev) 2379 continue; 2380 2381 port = am65_ndev_to_port(sl_ndev); 2382 slave = am65_ndev_to_slave(sl_ndev); 2383 slave->port_vlan = cpsw->default_vlan; 2384 2385 if (netif_running(sl_ndev)) 2386 am65_cpsw_init_port_switch_ale(port); 2387 } 2388 2389 } else { 2390 dev_info(cpsw->dev, "Disable switch mode\n"); 2391 2392 am65_cpsw_init_host_port_emac(cpsw); 2393 2394 for (i = 0; i < cpsw->port_num; i++) { 2395 struct net_device *sl_ndev = cpsw->ports[i].ndev; 2396 struct am65_cpsw_port *port; 2397 2398 if (!sl_ndev) 2399 continue; 2400 2401 port = am65_ndev_to_port(sl_ndev); 2402 port->slave.port_vlan = 0; 2403 if (netif_running(sl_ndev)) 2404 am65_cpsw_init_port_emac_ale(port); 2405 } 2406 } 2407 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_BYPASS, 0); 2408 exit: 2409 rtnl_unlock(); 2410 2411 return 0; 2412 } 2413 2414 static const struct devlink_param am65_cpsw_devlink_params[] = { 2415 DEVLINK_PARAM_DRIVER(AM65_CPSW_DL_PARAM_SWITCH_MODE, "switch_mode", 2416 DEVLINK_PARAM_TYPE_BOOL, 2417 BIT(DEVLINK_PARAM_CMODE_RUNTIME), 2418 am65_cpsw_dl_switch_mode_get, 2419 am65_cpsw_dl_switch_mode_set, NULL), 2420 }; 2421 2422 static int am65_cpsw_nuss_register_devlink(struct am65_cpsw_common *common) 2423 { 2424 struct devlink_port_attrs attrs = {}; 2425 struct am65_cpsw_devlink *dl_priv; 2426 struct device *dev = common->dev; 2427 struct devlink_port *dl_port; 2428 struct am65_cpsw_port *port; 2429 int ret = 0; 2430 int i; 2431 2432 common->devlink = 2433 devlink_alloc(&am65_cpsw_devlink_ops, sizeof(*dl_priv), dev); 2434 if (!common->devlink) 2435 return -ENOMEM; 2436 2437 dl_priv = devlink_priv(common->devlink); 2438 dl_priv->common = common; 2439 2440 /* Provide devlink hook to switch mode when multiple external ports 2441 * are present NUSS switchdev driver is enabled. 2442 */ 2443 if (!AM65_CPSW_IS_CPSW2G(common) && 2444 IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) { 2445 ret = devlink_params_register(common->devlink, 2446 am65_cpsw_devlink_params, 2447 ARRAY_SIZE(am65_cpsw_devlink_params)); 2448 if (ret) { 2449 dev_err(dev, "devlink params reg fail ret:%d\n", ret); 2450 goto dl_unreg; 2451 } 2452 } 2453 2454 for (i = 1; i <= common->port_num; i++) { 2455 port = am65_common_get_port(common, i); 2456 dl_port = &port->devlink_port; 2457 2458 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL; 2459 attrs.phys.port_number = port->port_id; 2460 attrs.switch_id.id_len = sizeof(resource_size_t); 2461 memcpy(attrs.switch_id.id, common->switch_id, attrs.switch_id.id_len); 2462 devlink_port_attrs_set(dl_port, &attrs); 2463 2464 ret = devlink_port_register(common->devlink, dl_port, port->port_id); 2465 if (ret) { 2466 dev_err(dev, "devlink_port reg fail for port %d, ret:%d\n", 2467 port->port_id, ret); 2468 goto dl_port_unreg; 2469 } 2470 } 2471 devlink_register(common->devlink); 2472 return ret; 2473 2474 dl_port_unreg: 2475 for (i = i - 1; i >= 1; i--) { 2476 port = am65_common_get_port(common, i); 2477 dl_port = &port->devlink_port; 2478 2479 devlink_port_unregister(dl_port); 2480 } 2481 dl_unreg: 2482 devlink_free(common->devlink); 2483 return ret; 2484 } 2485 2486 static void am65_cpsw_unregister_devlink(struct am65_cpsw_common *common) 2487 { 2488 struct devlink_port *dl_port; 2489 struct am65_cpsw_port *port; 2490 int i; 2491 2492 devlink_unregister(common->devlink); 2493 2494 for (i = 1; i <= common->port_num; i++) { 2495 port = am65_common_get_port(common, i); 2496 dl_port = &port->devlink_port; 2497 2498 devlink_port_unregister(dl_port); 2499 } 2500 2501 if (!AM65_CPSW_IS_CPSW2G(common) && 2502 IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) 2503 devlink_params_unregister(common->devlink, 2504 am65_cpsw_devlink_params, 2505 ARRAY_SIZE(am65_cpsw_devlink_params)); 2506 2507 devlink_free(common->devlink); 2508 } 2509 2510 static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common) 2511 { 2512 struct device *dev = common->dev; 2513 struct devlink_port *dl_port; 2514 struct am65_cpsw_port *port; 2515 int ret = 0, i; 2516 2517 ret = am65_cpsw_nuss_ndev_add_tx_napi(common); 2518 if (ret) 2519 return ret; 2520 2521 ret = devm_request_irq(dev, common->rx_chns.irq, 2522 am65_cpsw_nuss_rx_irq, 2523 IRQF_TRIGGER_HIGH, dev_name(dev), common); 2524 if (ret) { 2525 dev_err(dev, "failure requesting rx irq %u, %d\n", 2526 common->rx_chns.irq, ret); 2527 return ret; 2528 } 2529 2530 ret = am65_cpsw_nuss_register_devlink(common); 2531 if (ret) 2532 return ret; 2533 2534 for (i = 0; i < common->port_num; i++) { 2535 port = &common->ports[i]; 2536 2537 if (!port->ndev) 2538 continue; 2539 2540 ret = register_netdev(port->ndev); 2541 if (ret) { 2542 dev_err(dev, "error registering slave net device%i %d\n", 2543 i, ret); 2544 goto err_cleanup_ndev; 2545 } 2546 2547 dl_port = &port->devlink_port; 2548 devlink_port_type_eth_set(dl_port, port->ndev); 2549 } 2550 2551 ret = am65_cpsw_register_notifiers(common); 2552 if (ret) 2553 goto err_cleanup_ndev; 2554 2555 /* can't auto unregister ndev using devm_add_action() due to 2556 * devres release sequence in DD core for DMA 2557 */ 2558 2559 return 0; 2560 2561 err_cleanup_ndev: 2562 am65_cpsw_nuss_cleanup_ndev(common); 2563 am65_cpsw_unregister_devlink(common); 2564 2565 return ret; 2566 } 2567 2568 int am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common *common, int num_tx) 2569 { 2570 int ret; 2571 2572 common->tx_ch_num = num_tx; 2573 ret = am65_cpsw_nuss_init_tx_chns(common); 2574 if (ret) 2575 return ret; 2576 2577 return am65_cpsw_nuss_ndev_add_tx_napi(common); 2578 } 2579 2580 struct am65_cpsw_soc_pdata { 2581 u32 quirks_dis; 2582 }; 2583 2584 static const struct am65_cpsw_soc_pdata am65x_soc_sr2_0 = { 2585 .quirks_dis = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM, 2586 }; 2587 2588 static const struct soc_device_attribute am65_cpsw_socinfo[] = { 2589 { .family = "AM65X", 2590 .revision = "SR2.0", 2591 .data = &am65x_soc_sr2_0 2592 }, 2593 {/* sentinel */} 2594 }; 2595 2596 static const struct am65_cpsw_pdata am65x_sr1_0 = { 2597 .quirks = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM, 2598 .ale_dev_id = "am65x-cpsw2g", 2599 .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE, 2600 }; 2601 2602 static const struct am65_cpsw_pdata j721e_pdata = { 2603 .quirks = 0, 2604 .ale_dev_id = "am65x-cpsw2g", 2605 .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE, 2606 }; 2607 2608 static const struct am65_cpsw_pdata am64x_cpswxg_pdata = { 2609 .quirks = 0, 2610 .ale_dev_id = "am64-cpswxg", 2611 .fdqring_mode = K3_RINGACC_RING_MODE_RING, 2612 }; 2613 2614 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = { 2615 { .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0}, 2616 { .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata}, 2617 { .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata}, 2618 { /* sentinel */ }, 2619 }; 2620 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable); 2621 2622 static void am65_cpsw_nuss_apply_socinfo(struct am65_cpsw_common *common) 2623 { 2624 const struct soc_device_attribute *soc; 2625 2626 soc = soc_device_match(am65_cpsw_socinfo); 2627 if (soc && soc->data) { 2628 const struct am65_cpsw_soc_pdata *socdata = soc->data; 2629 2630 /* disable quirks */ 2631 common->pdata.quirks &= ~socdata->quirks_dis; 2632 } 2633 } 2634 2635 static int am65_cpsw_nuss_probe(struct platform_device *pdev) 2636 { 2637 struct cpsw_ale_params ale_params = { 0 }; 2638 const struct of_device_id *of_id; 2639 struct device *dev = &pdev->dev; 2640 struct am65_cpsw_common *common; 2641 struct device_node *node; 2642 struct resource *res; 2643 struct clk *clk; 2644 u64 id_temp; 2645 int ret, i; 2646 2647 common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL); 2648 if (!common) 2649 return -ENOMEM; 2650 common->dev = dev; 2651 2652 of_id = of_match_device(am65_cpsw_nuss_of_mtable, dev); 2653 if (!of_id) 2654 return -EINVAL; 2655 common->pdata = *(const struct am65_cpsw_pdata *)of_id->data; 2656 2657 am65_cpsw_nuss_apply_socinfo(common); 2658 2659 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cpsw_nuss"); 2660 common->ss_base = devm_ioremap_resource(&pdev->dev, res); 2661 if (IS_ERR(common->ss_base)) 2662 return PTR_ERR(common->ss_base); 2663 common->cpsw_base = common->ss_base + AM65_CPSW_CPSW_NU_BASE; 2664 /* Use device's physical base address as switch id */ 2665 id_temp = cpu_to_be64(res->start); 2666 memcpy(common->switch_id, &id_temp, sizeof(res->start)); 2667 2668 node = of_get_child_by_name(dev->of_node, "ethernet-ports"); 2669 if (!node) 2670 return -ENOENT; 2671 common->port_num = of_get_child_count(node); 2672 of_node_put(node); 2673 if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS) 2674 return -ENOENT; 2675 2676 common->rx_flow_id_base = -1; 2677 init_completion(&common->tdown_complete); 2678 common->tx_ch_num = 1; 2679 common->pf_p0_rx_ptype_rrobin = false; 2680 common->default_vlan = 1; 2681 2682 common->ports = devm_kcalloc(dev, common->port_num, 2683 sizeof(*common->ports), 2684 GFP_KERNEL); 2685 if (!common->ports) 2686 return -ENOMEM; 2687 2688 clk = devm_clk_get(dev, "fck"); 2689 if (IS_ERR(clk)) 2690 return dev_err_probe(dev, PTR_ERR(clk), "getting fck clock\n"); 2691 common->bus_freq = clk_get_rate(clk); 2692 2693 pm_runtime_enable(dev); 2694 ret = pm_runtime_resume_and_get(dev); 2695 if (ret < 0) { 2696 pm_runtime_disable(dev); 2697 return ret; 2698 } 2699 2700 node = of_get_child_by_name(dev->of_node, "mdio"); 2701 if (!node) { 2702 dev_warn(dev, "MDIO node not found\n"); 2703 } else if (of_device_is_available(node)) { 2704 struct platform_device *mdio_pdev; 2705 2706 mdio_pdev = of_platform_device_create(node, NULL, dev); 2707 if (!mdio_pdev) { 2708 ret = -ENODEV; 2709 goto err_pm_clear; 2710 } 2711 2712 common->mdio_dev = &mdio_pdev->dev; 2713 } 2714 of_node_put(node); 2715 2716 am65_cpsw_nuss_get_ver(common); 2717 2718 /* init tx channels */ 2719 ret = am65_cpsw_nuss_init_tx_chns(common); 2720 if (ret) 2721 goto err_of_clear; 2722 ret = am65_cpsw_nuss_init_rx_chns(common); 2723 if (ret) 2724 goto err_of_clear; 2725 2726 ret = am65_cpsw_nuss_init_host_p(common); 2727 if (ret) 2728 goto err_of_clear; 2729 2730 ret = am65_cpsw_nuss_init_slave_ports(common); 2731 if (ret) 2732 goto err_of_clear; 2733 2734 /* init common data */ 2735 ale_params.dev = dev; 2736 ale_params.ale_ageout = AM65_CPSW_ALE_AGEOUT_DEFAULT; 2737 ale_params.ale_ports = common->port_num + 1; 2738 ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE; 2739 ale_params.dev_id = common->pdata.ale_dev_id; 2740 ale_params.bus_freq = common->bus_freq; 2741 2742 common->ale = cpsw_ale_create(&ale_params); 2743 if (IS_ERR(common->ale)) { 2744 dev_err(dev, "error initializing ale engine\n"); 2745 ret = PTR_ERR(common->ale); 2746 goto err_of_clear; 2747 } 2748 2749 ret = am65_cpsw_init_cpts(common); 2750 if (ret) 2751 goto err_of_clear; 2752 2753 /* init ports */ 2754 for (i = 0; i < common->port_num; i++) 2755 am65_cpsw_nuss_slave_disable_unused(&common->ports[i]); 2756 2757 dev_set_drvdata(dev, common); 2758 2759 common->is_emac_mode = true; 2760 2761 ret = am65_cpsw_nuss_init_ndevs(common); 2762 if (ret) 2763 goto err_free_phylink; 2764 2765 ret = am65_cpsw_nuss_register_ndevs(common); 2766 if (ret) 2767 goto err_free_phylink; 2768 2769 pm_runtime_put(dev); 2770 return 0; 2771 2772 err_free_phylink: 2773 am65_cpsw_nuss_phylink_cleanup(common); 2774 err_of_clear: 2775 of_platform_device_destroy(common->mdio_dev, NULL); 2776 err_pm_clear: 2777 pm_runtime_put_sync(dev); 2778 pm_runtime_disable(dev); 2779 return ret; 2780 } 2781 2782 static int am65_cpsw_nuss_remove(struct platform_device *pdev) 2783 { 2784 struct device *dev = &pdev->dev; 2785 struct am65_cpsw_common *common; 2786 int ret; 2787 2788 common = dev_get_drvdata(dev); 2789 2790 ret = pm_runtime_resume_and_get(&pdev->dev); 2791 if (ret < 0) 2792 return ret; 2793 2794 am65_cpsw_nuss_phylink_cleanup(common); 2795 am65_cpsw_unregister_devlink(common); 2796 am65_cpsw_unregister_notifiers(common); 2797 2798 /* must unregister ndevs here because DD release_driver routine calls 2799 * dma_deconfigure(dev) before devres_release_all(dev) 2800 */ 2801 am65_cpsw_nuss_cleanup_ndev(common); 2802 2803 of_platform_device_destroy(common->mdio_dev, NULL); 2804 2805 pm_runtime_put_sync(&pdev->dev); 2806 pm_runtime_disable(&pdev->dev); 2807 return 0; 2808 } 2809 2810 static struct platform_driver am65_cpsw_nuss_driver = { 2811 .driver = { 2812 .name = AM65_CPSW_DRV_NAME, 2813 .of_match_table = am65_cpsw_nuss_of_mtable, 2814 }, 2815 .probe = am65_cpsw_nuss_probe, 2816 .remove = am65_cpsw_nuss_remove, 2817 }; 2818 2819 module_platform_driver(am65_cpsw_nuss_driver); 2820 2821 MODULE_LICENSE("GPL v2"); 2822 MODULE_AUTHOR("Grygorii Strashko <grygorii.strashko@ti.com>"); 2823 MODULE_DESCRIPTION("TI AM65 CPSW Ethernet driver"); 2824