1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * This file is based on code from OCTEON SDK by Cavium Networks. 4 * 5 * Copyright (c) 2003-2007 Cavium Networks 6 */ 7 8 #include <linux/platform_device.h> 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/netdevice.h> 12 #include <linux/etherdevice.h> 13 #include <linux/phy.h> 14 #include <linux/slab.h> 15 #include <linux/interrupt.h> 16 #include <linux/of_net.h> 17 #include <linux/if_ether.h> 18 #include <linux/if_vlan.h> 19 20 #include <net/dst.h> 21 22 #include <asm/octeon/octeon.h> 23 24 #include "ethernet-defines.h" 25 #include "octeon-ethernet.h" 26 #include "ethernet-mem.h" 27 #include "ethernet-rx.h" 28 #include "ethernet-tx.h" 29 #include "ethernet-mdio.h" 30 #include "ethernet-util.h" 31 32 #include <asm/octeon/cvmx-pip.h> 33 #include <asm/octeon/cvmx-pko.h> 34 #include <asm/octeon/cvmx-fau.h> 35 #include <asm/octeon/cvmx-ipd.h> 36 #include <asm/octeon/cvmx-helper.h> 37 #include <asm/octeon/cvmx-asxx-defs.h> 38 #include <asm/octeon/cvmx-gmxx-defs.h> 39 #include <asm/octeon/cvmx-smix-defs.h> 40 41 #define OCTEON_MAX_MTU 65392 42 43 static int num_packet_buffers = 1024; 44 module_param(num_packet_buffers, int, 0444); 45 MODULE_PARM_DESC(num_packet_buffers, "\n" 46 "\tNumber of packet buffers to allocate and store in the\n" 47 "\tFPA. By default, 1024 packet buffers are used.\n"); 48 49 static int pow_receive_group = 15; 50 module_param(pow_receive_group, int, 0444); 51 MODULE_PARM_DESC(pow_receive_group, "\n" 52 "\tPOW group to receive packets from. All ethernet hardware\n" 53 "\twill be configured to send incoming packets to this POW\n" 54 "\tgroup. Also any other software can submit packets to this\n" 55 "\tgroup for the kernel to process."); 56 57 static int receive_group_order; 58 module_param(receive_group_order, int, 0444); 59 MODULE_PARM_DESC(receive_group_order, "\n" 60 "\tOrder (0..4) of receive groups to take into use. Ethernet hardware\n" 61 "\twill be configured to send incoming packets to multiple POW\n" 62 "\tgroups. pow_receive_group parameter is ignored when multiple\n" 63 "\tgroups are taken into use and groups are allocated starting\n" 64 "\tfrom 0. By default, a single group is used.\n"); 65 66 int pow_send_group = -1; 67 module_param(pow_send_group, int, 0644); 68 MODULE_PARM_DESC(pow_send_group, "\n" 69 "\tPOW group to send packets to other software on. This\n" 70 "\tcontrols the creation of the virtual device pow0.\n" 71 "\talways_use_pow also depends on this value."); 72 73 int always_use_pow; 74 module_param(always_use_pow, int, 0444); 75 MODULE_PARM_DESC(always_use_pow, "\n" 76 "\tWhen set, always send to the pow group. This will cause\n" 77 "\tpackets sent to real ethernet devices to be sent to the\n" 78 "\tPOW group instead of the hardware. Unless some other\n" 79 "\tapplication changes the config, packets will still be\n" 80 "\treceived from the low level hardware. Use this option\n" 81 "\tto allow a CVMX app to intercept all packets from the\n" 82 "\tlinux kernel. You must specify pow_send_group along with\n" 83 "\tthis option."); 84 85 char pow_send_list[128] = ""; 86 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444); 87 MODULE_PARM_DESC(pow_send_list, "\n" 88 "\tComma separated list of ethernet devices that should use the\n" 89 "\tPOW for transmit instead of the actual ethernet hardware. This\n" 90 "\tis a per port version of always_use_pow. always_use_pow takes\n" 91 "\tprecedence over this list. For example, setting this to\n" 92 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n" 93 "\tusing the pow_send_group."); 94 95 int rx_napi_weight = 32; 96 module_param(rx_napi_weight, int, 0444); 97 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter."); 98 99 /* Mask indicating which receive groups are in use. */ 100 int pow_receive_groups; 101 102 /* 103 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop. 104 * 105 * Set to one right before cvm_oct_poll_queue is destroyed. 106 */ 107 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0); 108 109 /* 110 * Array of every ethernet device owned by this driver indexed by 111 * the ipd input port number. 112 */ 113 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS]; 114 115 u64 cvm_oct_tx_poll_interval; 116 117 static void cvm_oct_rx_refill_worker(struct work_struct *work); 118 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker); 119 120 static void cvm_oct_rx_refill_worker(struct work_struct *work) 121 { 122 /* 123 * FPA 0 may have been drained, try to refill it if we need 124 * more than num_packet_buffers / 2, otherwise normal receive 125 * processing will refill it. If it were drained, no packets 126 * could be received so cvm_oct_napi_poll would never be 127 * invoked to do the refill. 128 */ 129 cvm_oct_rx_refill_pool(num_packet_buffers / 2); 130 131 if (!atomic_read(&cvm_oct_poll_queue_stopping)) 132 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ); 133 } 134 135 static void cvm_oct_periodic_worker(struct work_struct *work) 136 { 137 struct octeon_ethernet *priv = container_of(work, 138 struct octeon_ethernet, 139 port_periodic_work.work); 140 141 if (priv->poll) 142 priv->poll(cvm_oct_device[priv->port]); 143 144 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats( 145 cvm_oct_device[priv->port]); 146 147 if (!atomic_read(&cvm_oct_poll_queue_stopping)) 148 schedule_delayed_work(&priv->port_periodic_work, HZ); 149 } 150 151 static void cvm_oct_configure_common_hw(void) 152 { 153 /* Setup the FPA */ 154 cvmx_fpa_enable(); 155 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, 156 num_packet_buffers); 157 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, 158 num_packet_buffers); 159 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) 160 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, 161 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 1024); 162 163 #ifdef __LITTLE_ENDIAN 164 { 165 union cvmx_ipd_ctl_status ipd_ctl_status; 166 167 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS); 168 ipd_ctl_status.s.pkt_lend = 1; 169 ipd_ctl_status.s.wqe_lend = 1; 170 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64); 171 } 172 #endif 173 174 cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8); 175 } 176 177 /** 178 * cvm_oct_free_work- Free a work queue entry 179 * 180 * @work_queue_entry: Work queue entry to free 181 * 182 * Returns Zero on success, Negative on failure. 183 */ 184 int cvm_oct_free_work(void *work_queue_entry) 185 { 186 cvmx_wqe_t *work = work_queue_entry; 187 188 int segments = work->word2.s.bufs; 189 union cvmx_buf_ptr segment_ptr = work->packet_ptr; 190 191 while (segments--) { 192 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *) 193 cvmx_phys_to_ptr(segment_ptr.s.addr - 8); 194 if (unlikely(!segment_ptr.s.i)) 195 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr), 196 segment_ptr.s.pool, 197 CVMX_FPA_PACKET_POOL_SIZE / 128); 198 segment_ptr = next_ptr; 199 } 200 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1); 201 202 return 0; 203 } 204 EXPORT_SYMBOL(cvm_oct_free_work); 205 206 /** 207 * cvm_oct_common_get_stats - get the low level ethernet statistics 208 * @dev: Device to get the statistics from 209 * 210 * Returns Pointer to the statistics 211 */ 212 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev) 213 { 214 cvmx_pip_port_status_t rx_status; 215 cvmx_pko_port_status_t tx_status; 216 struct octeon_ethernet *priv = netdev_priv(dev); 217 218 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) { 219 if (octeon_is_simulation()) { 220 /* The simulator doesn't support statistics */ 221 memset(&rx_status, 0, sizeof(rx_status)); 222 memset(&tx_status, 0, sizeof(tx_status)); 223 } else { 224 cvmx_pip_get_port_status(priv->port, 1, &rx_status); 225 cvmx_pko_get_port_status(priv->port, 1, &tx_status); 226 } 227 228 dev->stats.rx_packets += rx_status.inb_packets; 229 dev->stats.tx_packets += tx_status.packets; 230 dev->stats.rx_bytes += rx_status.inb_octets; 231 dev->stats.tx_bytes += tx_status.octets; 232 dev->stats.multicast += rx_status.multicast_packets; 233 dev->stats.rx_crc_errors += rx_status.inb_errors; 234 dev->stats.rx_frame_errors += rx_status.fcs_align_err_packets; 235 dev->stats.rx_dropped += rx_status.dropped_packets; 236 } 237 238 return &dev->stats; 239 } 240 241 /** 242 * cvm_oct_common_change_mtu - change the link MTU 243 * @dev: Device to change 244 * @new_mtu: The new MTU 245 * 246 * Returns Zero on success 247 */ 248 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu) 249 { 250 struct octeon_ethernet *priv = netdev_priv(dev); 251 int interface = INTERFACE(priv->port); 252 #if IS_ENABLED(CONFIG_VLAN_8021Q) 253 int vlan_bytes = VLAN_HLEN; 254 #else 255 int vlan_bytes = 0; 256 #endif 257 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN + vlan_bytes; 258 259 dev->mtu = new_mtu; 260 261 if ((interface < 2) && 262 (cvmx_helper_interface_get_mode(interface) != 263 CVMX_HELPER_INTERFACE_MODE_SPI)) { 264 int index = INDEX(priv->port); 265 /* Add ethernet header and FCS, and VLAN if configured. */ 266 int max_packet = new_mtu + mtu_overhead; 267 268 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || 269 OCTEON_IS_MODEL(OCTEON_CN58XX)) { 270 /* Signal errors on packets larger than the MTU */ 271 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface), 272 max_packet); 273 } else { 274 /* 275 * Set the hardware to truncate packets larger 276 * than the MTU and smaller the 64 bytes. 277 */ 278 union cvmx_pip_frm_len_chkx frm_len_chk; 279 280 frm_len_chk.u64 = 0; 281 frm_len_chk.s.minlen = VLAN_ETH_ZLEN; 282 frm_len_chk.s.maxlen = max_packet; 283 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface), 284 frm_len_chk.u64); 285 } 286 /* 287 * Set the hardware to truncate packets larger than 288 * the MTU. The jabber register must be set to a 289 * multiple of 8 bytes, so round up. 290 */ 291 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface), 292 (max_packet + 7) & ~7u); 293 } 294 return 0; 295 } 296 297 /** 298 * cvm_oct_common_set_multicast_list - set the multicast list 299 * @dev: Device to work on 300 */ 301 static void cvm_oct_common_set_multicast_list(struct net_device *dev) 302 { 303 union cvmx_gmxx_prtx_cfg gmx_cfg; 304 struct octeon_ethernet *priv = netdev_priv(dev); 305 int interface = INTERFACE(priv->port); 306 307 if ((interface < 2) && 308 (cvmx_helper_interface_get_mode(interface) != 309 CVMX_HELPER_INTERFACE_MODE_SPI)) { 310 union cvmx_gmxx_rxx_adr_ctl control; 311 int index = INDEX(priv->port); 312 313 control.u64 = 0; 314 control.s.bcst = 1; /* Allow broadcast MAC addresses */ 315 316 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) || 317 (dev->flags & IFF_PROMISC)) 318 /* Force accept multicast packets */ 319 control.s.mcst = 2; 320 else 321 /* Force reject multicast packets */ 322 control.s.mcst = 1; 323 324 if (dev->flags & IFF_PROMISC) 325 /* 326 * Reject matches if promisc. Since CAM is 327 * shut off, should accept everything. 328 */ 329 control.s.cam_mode = 0; 330 else 331 /* Filter packets based on the CAM */ 332 control.s.cam_mode = 1; 333 334 gmx_cfg.u64 = 335 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 336 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 337 gmx_cfg.u64 & ~1ull); 338 339 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface), 340 control.u64); 341 if (dev->flags & IFF_PROMISC) 342 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN 343 (index, interface), 0); 344 else 345 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN 346 (index, interface), 1); 347 348 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 349 gmx_cfg.u64); 350 } 351 } 352 353 static int cvm_oct_set_mac_filter(struct net_device *dev) 354 { 355 struct octeon_ethernet *priv = netdev_priv(dev); 356 union cvmx_gmxx_prtx_cfg gmx_cfg; 357 int interface = INTERFACE(priv->port); 358 359 if ((interface < 2) && 360 (cvmx_helper_interface_get_mode(interface) != 361 CVMX_HELPER_INTERFACE_MODE_SPI)) { 362 int i; 363 u8 *ptr = dev->dev_addr; 364 u64 mac = 0; 365 int index = INDEX(priv->port); 366 367 for (i = 0; i < 6; i++) 368 mac = (mac << 8) | (u64)ptr[i]; 369 370 gmx_cfg.u64 = 371 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 372 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 373 gmx_cfg.u64 & ~1ull); 374 375 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac); 376 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface), 377 ptr[0]); 378 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface), 379 ptr[1]); 380 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface), 381 ptr[2]); 382 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface), 383 ptr[3]); 384 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface), 385 ptr[4]); 386 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface), 387 ptr[5]); 388 cvm_oct_common_set_multicast_list(dev); 389 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 390 gmx_cfg.u64); 391 } 392 return 0; 393 } 394 395 /** 396 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device 397 * @dev: The device in question. 398 * @addr: Socket address. 399 * 400 * Returns Zero on success 401 */ 402 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr) 403 { 404 int r = eth_mac_addr(dev, addr); 405 406 if (r) 407 return r; 408 return cvm_oct_set_mac_filter(dev); 409 } 410 411 /** 412 * cvm_oct_common_init - per network device initialization 413 * @dev: Device to initialize 414 * 415 * Returns Zero on success 416 */ 417 int cvm_oct_common_init(struct net_device *dev) 418 { 419 struct octeon_ethernet *priv = netdev_priv(dev); 420 const u8 *mac = NULL; 421 422 if (priv->of_node) 423 mac = of_get_mac_address(priv->of_node); 424 425 if (mac) 426 ether_addr_copy(dev->dev_addr, mac); 427 else 428 eth_hw_addr_random(dev); 429 430 /* 431 * Force the interface to use the POW send if always_use_pow 432 * was specified or it is in the pow send list. 433 */ 434 if ((pow_send_group != -1) && 435 (always_use_pow || strstr(pow_send_list, dev->name))) 436 priv->queue = -1; 437 438 if (priv->queue != -1) 439 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; 440 441 /* We do our own locking, Linux doesn't need to */ 442 dev->features |= NETIF_F_LLTX; 443 dev->ethtool_ops = &cvm_oct_ethtool_ops; 444 445 cvm_oct_set_mac_filter(dev); 446 dev_set_mtu(dev, dev->mtu); 447 448 /* 449 * Zero out stats for port so we won't mistakenly show 450 * counters from the bootloader. 451 */ 452 memset(dev->netdev_ops->ndo_get_stats(dev), 0, 453 sizeof(struct net_device_stats)); 454 455 if (dev->netdev_ops->ndo_stop) 456 dev->netdev_ops->ndo_stop(dev); 457 458 return 0; 459 } 460 461 void cvm_oct_common_uninit(struct net_device *dev) 462 { 463 if (dev->phydev) 464 phy_disconnect(dev->phydev); 465 } 466 467 int cvm_oct_common_open(struct net_device *dev, 468 void (*link_poll)(struct net_device *)) 469 { 470 union cvmx_gmxx_prtx_cfg gmx_cfg; 471 struct octeon_ethernet *priv = netdev_priv(dev); 472 int interface = INTERFACE(priv->port); 473 int index = INDEX(priv->port); 474 cvmx_helper_link_info_t link_info; 475 int rv; 476 477 rv = cvm_oct_phy_setup_device(dev); 478 if (rv) 479 return rv; 480 481 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 482 gmx_cfg.s.en = 1; 483 if (octeon_has_feature(OCTEON_FEATURE_PKND)) 484 gmx_cfg.s.pknd = priv->port; 485 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); 486 487 if (octeon_is_simulation()) 488 return 0; 489 490 if (dev->phydev) { 491 int r = phy_read_status(dev->phydev); 492 493 if (r == 0 && dev->phydev->link == 0) 494 netif_carrier_off(dev); 495 cvm_oct_adjust_link(dev); 496 } else { 497 link_info = cvmx_helper_link_get(priv->port); 498 if (!link_info.s.link_up) 499 netif_carrier_off(dev); 500 priv->poll = link_poll; 501 link_poll(dev); 502 } 503 504 return 0; 505 } 506 507 void cvm_oct_link_poll(struct net_device *dev) 508 { 509 struct octeon_ethernet *priv = netdev_priv(dev); 510 cvmx_helper_link_info_t link_info; 511 512 link_info = cvmx_helper_link_get(priv->port); 513 if (link_info.u64 == priv->link_info) 514 return; 515 516 if (cvmx_helper_link_set(priv->port, link_info)) 517 link_info.u64 = priv->link_info; 518 else 519 priv->link_info = link_info.u64; 520 521 if (link_info.s.link_up) { 522 if (!netif_carrier_ok(dev)) 523 netif_carrier_on(dev); 524 } else if (netif_carrier_ok(dev)) { 525 netif_carrier_off(dev); 526 } 527 cvm_oct_note_carrier(priv, link_info); 528 } 529 530 static int cvm_oct_xaui_open(struct net_device *dev) 531 { 532 return cvm_oct_common_open(dev, cvm_oct_link_poll); 533 } 534 535 static const struct net_device_ops cvm_oct_npi_netdev_ops = { 536 .ndo_init = cvm_oct_common_init, 537 .ndo_uninit = cvm_oct_common_uninit, 538 .ndo_start_xmit = cvm_oct_xmit, 539 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 540 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 541 .ndo_do_ioctl = cvm_oct_ioctl, 542 .ndo_change_mtu = cvm_oct_common_change_mtu, 543 .ndo_get_stats = cvm_oct_common_get_stats, 544 #ifdef CONFIG_NET_POLL_CONTROLLER 545 .ndo_poll_controller = cvm_oct_poll_controller, 546 #endif 547 }; 548 549 static const struct net_device_ops cvm_oct_xaui_netdev_ops = { 550 .ndo_init = cvm_oct_common_init, 551 .ndo_uninit = cvm_oct_common_uninit, 552 .ndo_open = cvm_oct_xaui_open, 553 .ndo_stop = cvm_oct_common_stop, 554 .ndo_start_xmit = cvm_oct_xmit, 555 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 556 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 557 .ndo_do_ioctl = cvm_oct_ioctl, 558 .ndo_change_mtu = cvm_oct_common_change_mtu, 559 .ndo_get_stats = cvm_oct_common_get_stats, 560 #ifdef CONFIG_NET_POLL_CONTROLLER 561 .ndo_poll_controller = cvm_oct_poll_controller, 562 #endif 563 }; 564 565 static const struct net_device_ops cvm_oct_sgmii_netdev_ops = { 566 .ndo_init = cvm_oct_sgmii_init, 567 .ndo_uninit = cvm_oct_common_uninit, 568 .ndo_open = cvm_oct_sgmii_open, 569 .ndo_stop = cvm_oct_common_stop, 570 .ndo_start_xmit = cvm_oct_xmit, 571 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 572 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 573 .ndo_do_ioctl = cvm_oct_ioctl, 574 .ndo_change_mtu = cvm_oct_common_change_mtu, 575 .ndo_get_stats = cvm_oct_common_get_stats, 576 #ifdef CONFIG_NET_POLL_CONTROLLER 577 .ndo_poll_controller = cvm_oct_poll_controller, 578 #endif 579 }; 580 581 static const struct net_device_ops cvm_oct_spi_netdev_ops = { 582 .ndo_init = cvm_oct_spi_init, 583 .ndo_uninit = cvm_oct_spi_uninit, 584 .ndo_start_xmit = cvm_oct_xmit, 585 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 586 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 587 .ndo_do_ioctl = cvm_oct_ioctl, 588 .ndo_change_mtu = cvm_oct_common_change_mtu, 589 .ndo_get_stats = cvm_oct_common_get_stats, 590 #ifdef CONFIG_NET_POLL_CONTROLLER 591 .ndo_poll_controller = cvm_oct_poll_controller, 592 #endif 593 }; 594 595 static const struct net_device_ops cvm_oct_rgmii_netdev_ops = { 596 .ndo_init = cvm_oct_common_init, 597 .ndo_uninit = cvm_oct_common_uninit, 598 .ndo_open = cvm_oct_rgmii_open, 599 .ndo_stop = cvm_oct_common_stop, 600 .ndo_start_xmit = cvm_oct_xmit, 601 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 602 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 603 .ndo_do_ioctl = cvm_oct_ioctl, 604 .ndo_change_mtu = cvm_oct_common_change_mtu, 605 .ndo_get_stats = cvm_oct_common_get_stats, 606 #ifdef CONFIG_NET_POLL_CONTROLLER 607 .ndo_poll_controller = cvm_oct_poll_controller, 608 #endif 609 }; 610 611 static const struct net_device_ops cvm_oct_pow_netdev_ops = { 612 .ndo_init = cvm_oct_common_init, 613 .ndo_start_xmit = cvm_oct_xmit_pow, 614 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 615 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 616 .ndo_do_ioctl = cvm_oct_ioctl, 617 .ndo_change_mtu = cvm_oct_common_change_mtu, 618 .ndo_get_stats = cvm_oct_common_get_stats, 619 #ifdef CONFIG_NET_POLL_CONTROLLER 620 .ndo_poll_controller = cvm_oct_poll_controller, 621 #endif 622 }; 623 624 static struct device_node *cvm_oct_of_get_child( 625 const struct device_node *parent, int reg_val) 626 { 627 struct device_node *node = NULL; 628 int size; 629 const __be32 *addr; 630 631 for (;;) { 632 node = of_get_next_child(parent, node); 633 if (!node) 634 break; 635 addr = of_get_property(node, "reg", &size); 636 if (addr && (be32_to_cpu(*addr) == reg_val)) 637 break; 638 } 639 return node; 640 } 641 642 static struct device_node *cvm_oct_node_for_port(struct device_node *pip, 643 int interface, int port) 644 { 645 struct device_node *ni, *np; 646 647 ni = cvm_oct_of_get_child(pip, interface); 648 if (!ni) 649 return NULL; 650 651 np = cvm_oct_of_get_child(ni, port); 652 of_node_put(ni); 653 654 return np; 655 } 656 657 static void cvm_set_rgmii_delay(struct device_node *np, int iface, int port) 658 { 659 u32 delay_value; 660 661 if (!of_property_read_u32(np, "rx-delay", &delay_value)) 662 cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, iface), delay_value); 663 if (!of_property_read_u32(np, "tx-delay", &delay_value)) 664 cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, iface), delay_value); 665 } 666 667 static int cvm_oct_probe(struct platform_device *pdev) 668 { 669 int num_interfaces; 670 int interface; 671 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE; 672 int qos; 673 struct device_node *pip; 674 int mtu_overhead = ETH_HLEN + ETH_FCS_LEN; 675 676 #if IS_ENABLED(CONFIG_VLAN_8021Q) 677 mtu_overhead += VLAN_HLEN; 678 #endif 679 680 octeon_mdiobus_force_mod_depencency(); 681 682 pip = pdev->dev.of_node; 683 if (!pip) { 684 pr_err("Error: No 'pip' in /aliases\n"); 685 return -EINVAL; 686 } 687 688 cvm_oct_configure_common_hw(); 689 690 cvmx_helper_initialize_packet_io_global(); 691 692 if (receive_group_order) { 693 if (receive_group_order > 4) 694 receive_group_order = 4; 695 pow_receive_groups = (1 << (1 << receive_group_order)) - 1; 696 } else { 697 pow_receive_groups = BIT(pow_receive_group); 698 } 699 700 /* Change the input group for all ports before input is enabled */ 701 num_interfaces = cvmx_helper_get_number_of_interfaces(); 702 for (interface = 0; interface < num_interfaces; interface++) { 703 int num_ports = cvmx_helper_ports_on_interface(interface); 704 int port; 705 706 for (port = cvmx_helper_get_ipd_port(interface, 0); 707 port < cvmx_helper_get_ipd_port(interface, num_ports); 708 port++) { 709 union cvmx_pip_prt_tagx pip_prt_tagx; 710 711 pip_prt_tagx.u64 = 712 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port)); 713 714 if (receive_group_order) { 715 int tag_mask; 716 717 /* We support only 16 groups at the moment, so 718 * always disable the two additional "hidden" 719 * tag_mask bits on CN68XX. 720 */ 721 if (OCTEON_IS_MODEL(OCTEON_CN68XX)) 722 pip_prt_tagx.u64 |= 0x3ull << 44; 723 724 tag_mask = ~((1 << receive_group_order) - 1); 725 pip_prt_tagx.s.grptagbase = 0; 726 pip_prt_tagx.s.grptagmask = tag_mask; 727 pip_prt_tagx.s.grptag = 1; 728 pip_prt_tagx.s.tag_mode = 0; 729 pip_prt_tagx.s.inc_prt_flag = 1; 730 pip_prt_tagx.s.ip6_dprt_flag = 1; 731 pip_prt_tagx.s.ip4_dprt_flag = 1; 732 pip_prt_tagx.s.ip6_sprt_flag = 1; 733 pip_prt_tagx.s.ip4_sprt_flag = 1; 734 pip_prt_tagx.s.ip6_dst_flag = 1; 735 pip_prt_tagx.s.ip4_dst_flag = 1; 736 pip_prt_tagx.s.ip6_src_flag = 1; 737 pip_prt_tagx.s.ip4_src_flag = 1; 738 pip_prt_tagx.s.grp = 0; 739 } else { 740 pip_prt_tagx.s.grptag = 0; 741 pip_prt_tagx.s.grp = pow_receive_group; 742 } 743 744 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port), 745 pip_prt_tagx.u64); 746 } 747 } 748 749 cvmx_helper_ipd_and_packet_input_enable(); 750 751 memset(cvm_oct_device, 0, sizeof(cvm_oct_device)); 752 753 /* 754 * Initialize the FAU used for counting packet buffers that 755 * need to be freed. 756 */ 757 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0); 758 759 /* Initialize the FAU used for counting tx SKBs that need to be freed */ 760 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0); 761 762 if ((pow_send_group != -1)) { 763 struct net_device *dev; 764 765 dev = alloc_etherdev(sizeof(struct octeon_ethernet)); 766 if (dev) { 767 /* Initialize the device private structure. */ 768 struct octeon_ethernet *priv = netdev_priv(dev); 769 770 SET_NETDEV_DEV(dev, &pdev->dev); 771 dev->netdev_ops = &cvm_oct_pow_netdev_ops; 772 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED; 773 priv->port = CVMX_PIP_NUM_INPUT_PORTS; 774 priv->queue = -1; 775 strcpy(dev->name, "pow%d"); 776 for (qos = 0; qos < 16; qos++) 777 skb_queue_head_init(&priv->tx_free_list[qos]); 778 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead; 779 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead; 780 781 if (register_netdev(dev) < 0) { 782 pr_err("Failed to register ethernet device for POW\n"); 783 free_netdev(dev); 784 } else { 785 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev; 786 pr_info("%s: POW send group %d, receive group %d\n", 787 dev->name, pow_send_group, 788 pow_receive_group); 789 } 790 } else { 791 pr_err("Failed to allocate ethernet device for POW\n"); 792 } 793 } 794 795 num_interfaces = cvmx_helper_get_number_of_interfaces(); 796 for (interface = 0; interface < num_interfaces; interface++) { 797 cvmx_helper_interface_mode_t imode = 798 cvmx_helper_interface_get_mode(interface); 799 int num_ports = cvmx_helper_ports_on_interface(interface); 800 int port; 801 int port_index; 802 803 for (port_index = 0, 804 port = cvmx_helper_get_ipd_port(interface, 0); 805 port < cvmx_helper_get_ipd_port(interface, num_ports); 806 port_index++, port++) { 807 struct octeon_ethernet *priv; 808 struct net_device *dev = 809 alloc_etherdev(sizeof(struct octeon_ethernet)); 810 if (!dev) { 811 pr_err("Failed to allocate ethernet device for port %d\n", 812 port); 813 continue; 814 } 815 816 /* Initialize the device private structure. */ 817 SET_NETDEV_DEV(dev, &pdev->dev); 818 priv = netdev_priv(dev); 819 priv->netdev = dev; 820 priv->of_node = cvm_oct_node_for_port(pip, interface, 821 port_index); 822 823 INIT_DELAYED_WORK(&priv->port_periodic_work, 824 cvm_oct_periodic_worker); 825 priv->imode = imode; 826 priv->port = port; 827 priv->queue = cvmx_pko_get_base_queue(priv->port); 828 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4; 829 for (qos = 0; qos < 16; qos++) 830 skb_queue_head_init(&priv->tx_free_list[qos]); 831 for (qos = 0; qos < cvmx_pko_get_num_queues(port); 832 qos++) 833 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0); 834 dev->min_mtu = VLAN_ETH_ZLEN - mtu_overhead; 835 dev->max_mtu = OCTEON_MAX_MTU - mtu_overhead; 836 837 switch (priv->imode) { 838 /* These types don't support ports to IPD/PKO */ 839 case CVMX_HELPER_INTERFACE_MODE_DISABLED: 840 case CVMX_HELPER_INTERFACE_MODE_PCIE: 841 case CVMX_HELPER_INTERFACE_MODE_PICMG: 842 break; 843 844 case CVMX_HELPER_INTERFACE_MODE_NPI: 845 dev->netdev_ops = &cvm_oct_npi_netdev_ops; 846 strcpy(dev->name, "npi%d"); 847 break; 848 849 case CVMX_HELPER_INTERFACE_MODE_XAUI: 850 dev->netdev_ops = &cvm_oct_xaui_netdev_ops; 851 strcpy(dev->name, "xaui%d"); 852 break; 853 854 case CVMX_HELPER_INTERFACE_MODE_LOOP: 855 dev->netdev_ops = &cvm_oct_npi_netdev_ops; 856 strcpy(dev->name, "loop%d"); 857 break; 858 859 case CVMX_HELPER_INTERFACE_MODE_SGMII: 860 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops; 861 strcpy(dev->name, "eth%d"); 862 break; 863 864 case CVMX_HELPER_INTERFACE_MODE_SPI: 865 dev->netdev_ops = &cvm_oct_spi_netdev_ops; 866 strcpy(dev->name, "spi%d"); 867 break; 868 869 case CVMX_HELPER_INTERFACE_MODE_RGMII: 870 case CVMX_HELPER_INTERFACE_MODE_GMII: 871 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops; 872 strcpy(dev->name, "eth%d"); 873 cvm_set_rgmii_delay(priv->of_node, interface, 874 port_index); 875 break; 876 } 877 878 if (!dev->netdev_ops) { 879 free_netdev(dev); 880 } else if (register_netdev(dev) < 0) { 881 pr_err("Failed to register ethernet device for interface %d, port %d\n", 882 interface, priv->port); 883 free_netdev(dev); 884 } else { 885 cvm_oct_device[priv->port] = dev; 886 fau -= 887 cvmx_pko_get_num_queues(priv->port) * 888 sizeof(u32); 889 schedule_delayed_work(&priv->port_periodic_work, 890 HZ); 891 } 892 } 893 } 894 895 cvm_oct_tx_initialize(); 896 cvm_oct_rx_initialize(); 897 898 /* 899 * 150 uS: about 10 1500-byte packets at 1GE. 900 */ 901 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000); 902 903 schedule_delayed_work(&cvm_oct_rx_refill_work, HZ); 904 905 return 0; 906 } 907 908 static int cvm_oct_remove(struct platform_device *pdev) 909 { 910 int port; 911 912 cvmx_ipd_disable(); 913 914 atomic_inc_return(&cvm_oct_poll_queue_stopping); 915 cancel_delayed_work_sync(&cvm_oct_rx_refill_work); 916 917 cvm_oct_rx_shutdown(); 918 cvm_oct_tx_shutdown(); 919 920 cvmx_pko_disable(); 921 922 /* Free the ethernet devices */ 923 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) { 924 if (cvm_oct_device[port]) { 925 struct net_device *dev = cvm_oct_device[port]; 926 struct octeon_ethernet *priv = netdev_priv(dev); 927 928 cancel_delayed_work_sync(&priv->port_periodic_work); 929 930 cvm_oct_tx_shutdown_dev(dev); 931 unregister_netdev(dev); 932 free_netdev(dev); 933 cvm_oct_device[port] = NULL; 934 } 935 } 936 937 cvmx_pko_shutdown(); 938 939 cvmx_ipd_free_ptr(); 940 941 /* Free the HW pools */ 942 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, 943 num_packet_buffers); 944 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, 945 num_packet_buffers); 946 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) 947 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, 948 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128); 949 return 0; 950 } 951 952 static const struct of_device_id cvm_oct_match[] = { 953 { 954 .compatible = "cavium,octeon-3860-pip", 955 }, 956 {}, 957 }; 958 MODULE_DEVICE_TABLE(of, cvm_oct_match); 959 960 static struct platform_driver cvm_oct_driver = { 961 .probe = cvm_oct_probe, 962 .remove = cvm_oct_remove, 963 .driver = { 964 .name = KBUILD_MODNAME, 965 .of_match_table = cvm_oct_match, 966 }, 967 }; 968 969 module_platform_driver(cvm_oct_driver); 970 971 MODULE_LICENSE("GPL"); 972 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>"); 973 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver."); 974