ethernet.c revision 39bc7513aa92b38c391dbe9649841f9f9dfcd0ac
1/********************************************************************** 2 * Author: Cavium Networks 3 * 4 * Contact: support@caviumnetworks.com 5 * This file is part of the OCTEON SDK 6 * 7 * Copyright (c) 2003-2007 Cavium Networks 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this file; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * or visit http://www.gnu.org/licenses/. 23 * 24 * This file may also be available under a different license from Cavium. 25 * Contact Cavium Networks for more information 26**********************************************************************/ 27#include <linux/platform_device.h> 28#include <linux/kernel.h> 29#include <linux/module.h> 30#include <linux/netdevice.h> 31#include <linux/etherdevice.h> 32#include <linux/phy.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/of_net.h> 36 37#include <net/dst.h> 38 39#include <asm/octeon/octeon.h> 40 41#include "ethernet-defines.h" 42#include "octeon-ethernet.h" 43#include "ethernet-mem.h" 44#include "ethernet-rx.h" 45#include "ethernet-tx.h" 46#include "ethernet-mdio.h" 47#include "ethernet-util.h" 48 49#include <asm/octeon/cvmx-pip.h> 50#include <asm/octeon/cvmx-pko.h> 51#include <asm/octeon/cvmx-fau.h> 52#include <asm/octeon/cvmx-ipd.h> 53#include <asm/octeon/cvmx-helper.h> 54 55#include <asm/octeon/cvmx-gmxx-defs.h> 56#include <asm/octeon/cvmx-smix-defs.h> 57 58static int num_packet_buffers = 1024; 59module_param(num_packet_buffers, int, 0444); 60MODULE_PARM_DESC(num_packet_buffers, "\n" 61 "\tNumber of packet buffers to allocate and store in the\n" 62 "\tFPA. By default, 1024 packet buffers are used.\n"); 63 64int pow_receive_group = 15; 65module_param(pow_receive_group, int, 0444); 66MODULE_PARM_DESC(pow_receive_group, "\n" 67 "\tPOW group to receive packets from. All ethernet hardware\n" 68 "\twill be configured to send incoming packets to this POW\n" 69 "\tgroup. Also any other software can submit packets to this\n" 70 "\tgroup for the kernel to process."); 71 72int pow_send_group = -1; 73module_param(pow_send_group, int, 0644); 74MODULE_PARM_DESC(pow_send_group, "\n" 75 "\tPOW group to send packets to other software on. This\n" 76 "\tcontrols the creation of the virtual device pow0.\n" 77 "\talways_use_pow also depends on this value."); 78 79int always_use_pow; 80module_param(always_use_pow, int, 0444); 81MODULE_PARM_DESC(always_use_pow, "\n" 82 "\tWhen set, always send to the pow group. This will cause\n" 83 "\tpackets sent to real ethernet devices to be sent to the\n" 84 "\tPOW group instead of the hardware. Unless some other\n" 85 "\tapplication changes the config, packets will still be\n" 86 "\treceived from the low level hardware. Use this option\n" 87 "\tto allow a CVMX app to intercept all packets from the\n" 88 "\tlinux kernel. You must specify pow_send_group along with\n" 89 "\tthis option."); 90 91char pow_send_list[128] = ""; 92module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444); 93MODULE_PARM_DESC(pow_send_list, "\n" 94 "\tComma separated list of ethernet devices that should use the\n" 95 "\tPOW for transmit instead of the actual ethernet hardware. This\n" 96 "\tis a per port version of always_use_pow. always_use_pow takes\n" 97 "\tprecedence over this list. For example, setting this to\n" 98 "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n" 99 "\tusing the pow_send_group."); 100 101int max_rx_cpus = -1; 102module_param(max_rx_cpus, int, 0444); 103MODULE_PARM_DESC(max_rx_cpus, "\n" 104 "\t\tThe maximum number of CPUs to use for packet reception.\n" 105 "\t\tUse -1 to use all available CPUs."); 106 107int rx_napi_weight = 32; 108module_param(rx_napi_weight, int, 0444); 109MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter."); 110 111/** 112 * cvm_oct_poll_queue - Workqueue for polling operations. 113 */ 114struct workqueue_struct *cvm_oct_poll_queue; 115 116/** 117 * cvm_oct_poll_queue_stopping - flag to indicate polling should stop. 118 * 119 * Set to one right before cvm_oct_poll_queue is destroyed. 120 */ 121atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0); 122 123/** 124 * Array of every ethernet device owned by this driver indexed by 125 * the ipd input port number. 126 */ 127struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS]; 128 129u64 cvm_oct_tx_poll_interval; 130 131static void cvm_oct_rx_refill_worker(struct work_struct *work); 132static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker); 133 134static void cvm_oct_rx_refill_worker(struct work_struct *work) 135{ 136 /* 137 * FPA 0 may have been drained, try to refill it if we need 138 * more than num_packet_buffers / 2, otherwise normal receive 139 * processing will refill it. If it were drained, no packets 140 * could be received so cvm_oct_napi_poll would never be 141 * invoked to do the refill. 142 */ 143 cvm_oct_rx_refill_pool(num_packet_buffers / 2); 144 145 if (!atomic_read(&cvm_oct_poll_queue_stopping)) 146 queue_delayed_work(cvm_oct_poll_queue, 147 &cvm_oct_rx_refill_work, HZ); 148} 149 150static void cvm_oct_periodic_worker(struct work_struct *work) 151{ 152 struct octeon_ethernet *priv = container_of(work, 153 struct octeon_ethernet, 154 port_periodic_work.work); 155 156 if (priv->poll) 157 priv->poll(cvm_oct_device[priv->port]); 158 159 cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats( 160 cvm_oct_device[priv->port]); 161 162 if (!atomic_read(&cvm_oct_poll_queue_stopping)) 163 queue_delayed_work(cvm_oct_poll_queue, 164 &priv->port_periodic_work, HZ); 165} 166 167static void cvm_oct_configure_common_hw(void) 168{ 169 /* Setup the FPA */ 170 cvmx_fpa_enable(); 171 cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, 172 num_packet_buffers); 173 cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, 174 num_packet_buffers); 175 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) 176 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, 177 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128); 178 179 if (USE_RED) 180 cvmx_helper_setup_red(num_packet_buffers / 4, 181 num_packet_buffers / 8); 182 183} 184 185/** 186 * cvm_oct_free_work- Free a work queue entry 187 * 188 * @work_queue_entry: Work queue entry to free 189 * 190 * Returns Zero on success, Negative on failure. 191 */ 192int cvm_oct_free_work(void *work_queue_entry) 193{ 194 cvmx_wqe_t *work = work_queue_entry; 195 196 int segments = work->word2.s.bufs; 197 union cvmx_buf_ptr segment_ptr = work->packet_ptr; 198 199 while (segments--) { 200 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *) 201 cvmx_phys_to_ptr(segment_ptr.s.addr - 8); 202 if (unlikely(!segment_ptr.s.i)) 203 cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr), 204 segment_ptr.s.pool, 205 DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE / 206 128)); 207 segment_ptr = next_ptr; 208 } 209 cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1)); 210 211 return 0; 212} 213EXPORT_SYMBOL(cvm_oct_free_work); 214 215/** 216 * cvm_oct_common_get_stats - get the low level ethernet statistics 217 * @dev: Device to get the statistics from 218 * 219 * Returns Pointer to the statistics 220 */ 221static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev) 222{ 223 cvmx_pip_port_status_t rx_status; 224 cvmx_pko_port_status_t tx_status; 225 struct octeon_ethernet *priv = netdev_priv(dev); 226 227 if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) { 228 if (octeon_is_simulation()) { 229 /* The simulator doesn't support statistics */ 230 memset(&rx_status, 0, sizeof(rx_status)); 231 memset(&tx_status, 0, sizeof(tx_status)); 232 } else { 233 cvmx_pip_get_port_status(priv->port, 1, &rx_status); 234 cvmx_pko_get_port_status(priv->port, 1, &tx_status); 235 } 236 237 priv->stats.rx_packets += rx_status.inb_packets; 238 priv->stats.tx_packets += tx_status.packets; 239 priv->stats.rx_bytes += rx_status.inb_octets; 240 priv->stats.tx_bytes += tx_status.octets; 241 priv->stats.multicast += rx_status.multicast_packets; 242 priv->stats.rx_crc_errors += rx_status.inb_errors; 243 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets; 244 245 /* 246 * The drop counter must be incremented atomically 247 * since the RX tasklet also increments it. 248 */ 249#ifdef CONFIG_64BIT 250 atomic64_add(rx_status.dropped_packets, 251 (atomic64_t *)&priv->stats.rx_dropped); 252#else 253 atomic_add(rx_status.dropped_packets, 254 (atomic_t *)&priv->stats.rx_dropped); 255#endif 256 } 257 258 return &priv->stats; 259} 260 261/** 262 * cvm_oct_common_change_mtu - change the link MTU 263 * @dev: Device to change 264 * @new_mtu: The new MTU 265 * 266 * Returns Zero on success 267 */ 268static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu) 269{ 270 struct octeon_ethernet *priv = netdev_priv(dev); 271 int interface = INTERFACE(priv->port); 272 int index = INDEX(priv->port); 273#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) 274 int vlan_bytes = 4; 275#else 276 int vlan_bytes = 0; 277#endif 278 279 /* 280 * Limit the MTU to make sure the ethernet packets are between 281 * 64 bytes and 65535 bytes. 282 */ 283 if ((new_mtu + 14 + 4 + vlan_bytes < 64) 284 || (new_mtu + 14 + 4 + vlan_bytes > 65392)) { 285 pr_err("MTU must be between %d and %d.\n", 286 64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes); 287 return -EINVAL; 288 } 289 dev->mtu = new_mtu; 290 291 if ((interface < 2) 292 && (cvmx_helper_interface_get_mode(interface) != 293 CVMX_HELPER_INTERFACE_MODE_SPI)) { 294 /* Add ethernet header and FCS, and VLAN if configured. */ 295 int max_packet = new_mtu + 14 + 4 + vlan_bytes; 296 297 if (OCTEON_IS_MODEL(OCTEON_CN3XXX) 298 || OCTEON_IS_MODEL(OCTEON_CN58XX)) { 299 /* Signal errors on packets larger than the MTU */ 300 cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface), 301 max_packet); 302 } else { 303 /* 304 * Set the hardware to truncate packets larger 305 * than the MTU and smaller the 64 bytes. 306 */ 307 union cvmx_pip_frm_len_chkx frm_len_chk; 308 309 frm_len_chk.u64 = 0; 310 frm_len_chk.s.minlen = 64; 311 frm_len_chk.s.maxlen = max_packet; 312 cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface), 313 frm_len_chk.u64); 314 } 315 /* 316 * Set the hardware to truncate packets larger than 317 * the MTU. The jabber register must be set to a 318 * multiple of 8 bytes, so round up. 319 */ 320 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface), 321 (max_packet + 7) & ~7u); 322 } 323 return 0; 324} 325 326/** 327 * cvm_oct_common_set_multicast_list - set the multicast list 328 * @dev: Device to work on 329 */ 330static void cvm_oct_common_set_multicast_list(struct net_device *dev) 331{ 332 union cvmx_gmxx_prtx_cfg gmx_cfg; 333 struct octeon_ethernet *priv = netdev_priv(dev); 334 int interface = INTERFACE(priv->port); 335 int index = INDEX(priv->port); 336 337 if ((interface < 2) 338 && (cvmx_helper_interface_get_mode(interface) != 339 CVMX_HELPER_INTERFACE_MODE_SPI)) { 340 union cvmx_gmxx_rxx_adr_ctl control; 341 342 control.u64 = 0; 343 control.s.bcst = 1; /* Allow broadcast MAC addresses */ 344 345 if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) || 346 (dev->flags & IFF_PROMISC)) 347 /* Force accept multicast packets */ 348 control.s.mcst = 2; 349 else 350 /* Force reject multicast packets */ 351 control.s.mcst = 1; 352 353 if (dev->flags & IFF_PROMISC) 354 /* 355 * Reject matches if promisc. Since CAM is 356 * shut off, should accept everything. 357 */ 358 control.s.cam_mode = 0; 359 else 360 /* Filter packets based on the CAM */ 361 control.s.cam_mode = 1; 362 363 gmx_cfg.u64 = 364 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 365 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 366 gmx_cfg.u64 & ~1ull); 367 368 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CTL(index, interface), 369 control.u64); 370 if (dev->flags & IFF_PROMISC) 371 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN 372 (index, interface), 0); 373 else 374 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM_EN 375 (index, interface), 1); 376 377 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 378 gmx_cfg.u64); 379 } 380} 381 382/** 383 * cvm_oct_common_set_mac_address - set the hardware MAC address for a device 384 * @dev: The device in question. 385 * @addr: Address structure to change it too. 386 387 * Returns Zero on success 388 */ 389static int cvm_oct_set_mac_filter(struct net_device *dev) 390{ 391 struct octeon_ethernet *priv = netdev_priv(dev); 392 union cvmx_gmxx_prtx_cfg gmx_cfg; 393 int interface = INTERFACE(priv->port); 394 int index = INDEX(priv->port); 395 396 if ((interface < 2) 397 && (cvmx_helper_interface_get_mode(interface) != 398 CVMX_HELPER_INTERFACE_MODE_SPI)) { 399 int i; 400 uint8_t *ptr = dev->dev_addr; 401 uint64_t mac = 0; 402 403 for (i = 0; i < 6; i++) 404 mac = (mac << 8) | (uint64_t)ptr[i]; 405 406 gmx_cfg.u64 = 407 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 408 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 409 gmx_cfg.u64 & ~1ull); 410 411 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac); 412 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface), 413 ptr[0]); 414 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface), 415 ptr[1]); 416 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface), 417 ptr[2]); 418 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface), 419 ptr[3]); 420 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface), 421 ptr[4]); 422 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface), 423 ptr[5]); 424 cvm_oct_common_set_multicast_list(dev); 425 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 426 gmx_cfg.u64); 427 } 428 return 0; 429} 430 431static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr) 432{ 433 int r = eth_mac_addr(dev, addr); 434 435 if (r) 436 return r; 437 return cvm_oct_set_mac_filter(dev); 438} 439 440/** 441 * cvm_oct_common_init - per network device initialization 442 * @dev: Device to initialize 443 * 444 * Returns Zero on success 445 */ 446int cvm_oct_common_init(struct net_device *dev) 447{ 448 struct octeon_ethernet *priv = netdev_priv(dev); 449 const u8 *mac = NULL; 450 451 if (priv->of_node) 452 mac = of_get_mac_address(priv->of_node); 453 454 if (mac) 455 memcpy(dev->dev_addr, mac, ETH_ALEN); 456 else 457 eth_hw_addr_random(dev); 458 459 /* 460 * Force the interface to use the POW send if always_use_pow 461 * was specified or it is in the pow send list. 462 */ 463 if ((pow_send_group != -1) 464 && (always_use_pow || strstr(pow_send_list, dev->name))) 465 priv->queue = -1; 466 467 if (priv->queue != -1) { 468 dev->features |= NETIF_F_SG; 469 if (USE_HW_TCPUDP_CHECKSUM) 470 dev->features |= NETIF_F_IP_CSUM; 471 } 472 473 /* We do our own locking, Linux doesn't need to */ 474 dev->features |= NETIF_F_LLTX; 475 dev->ethtool_ops = &cvm_oct_ethtool_ops; 476 477 cvm_oct_set_mac_filter(dev); 478 dev->netdev_ops->ndo_change_mtu(dev, dev->mtu); 479 480 /* 481 * Zero out stats for port so we won't mistakenly show 482 * counters from the bootloader. 483 */ 484 memset(dev->netdev_ops->ndo_get_stats(dev), 0, 485 sizeof(struct net_device_stats)); 486 487 return 0; 488} 489 490void cvm_oct_common_uninit(struct net_device *dev) 491{ 492 struct octeon_ethernet *priv = netdev_priv(dev); 493 494 if (priv->phydev) 495 phy_disconnect(priv->phydev); 496} 497 498static const struct net_device_ops cvm_oct_npi_netdev_ops = { 499 .ndo_init = cvm_oct_common_init, 500 .ndo_uninit = cvm_oct_common_uninit, 501 .ndo_start_xmit = cvm_oct_xmit, 502 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 503 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 504 .ndo_do_ioctl = cvm_oct_ioctl, 505 .ndo_change_mtu = cvm_oct_common_change_mtu, 506 .ndo_get_stats = cvm_oct_common_get_stats, 507#ifdef CONFIG_NET_POLL_CONTROLLER 508 .ndo_poll_controller = cvm_oct_poll_controller, 509#endif 510}; 511static const struct net_device_ops cvm_oct_xaui_netdev_ops = { 512 .ndo_init = cvm_oct_xaui_init, 513 .ndo_uninit = cvm_oct_xaui_uninit, 514 .ndo_open = cvm_oct_xaui_open, 515 .ndo_stop = cvm_oct_xaui_stop, 516 .ndo_start_xmit = cvm_oct_xmit, 517 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 518 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 519 .ndo_do_ioctl = cvm_oct_ioctl, 520 .ndo_change_mtu = cvm_oct_common_change_mtu, 521 .ndo_get_stats = cvm_oct_common_get_stats, 522#ifdef CONFIG_NET_POLL_CONTROLLER 523 .ndo_poll_controller = cvm_oct_poll_controller, 524#endif 525}; 526static const struct net_device_ops cvm_oct_sgmii_netdev_ops = { 527 .ndo_init = cvm_oct_sgmii_init, 528 .ndo_uninit = cvm_oct_sgmii_uninit, 529 .ndo_open = cvm_oct_sgmii_open, 530 .ndo_stop = cvm_oct_sgmii_stop, 531 .ndo_start_xmit = cvm_oct_xmit, 532 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 533 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 534 .ndo_do_ioctl = cvm_oct_ioctl, 535 .ndo_change_mtu = cvm_oct_common_change_mtu, 536 .ndo_get_stats = cvm_oct_common_get_stats, 537#ifdef CONFIG_NET_POLL_CONTROLLER 538 .ndo_poll_controller = cvm_oct_poll_controller, 539#endif 540}; 541static const struct net_device_ops cvm_oct_spi_netdev_ops = { 542 .ndo_init = cvm_oct_spi_init, 543 .ndo_uninit = cvm_oct_spi_uninit, 544 .ndo_start_xmit = cvm_oct_xmit, 545 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 546 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 547 .ndo_do_ioctl = cvm_oct_ioctl, 548 .ndo_change_mtu = cvm_oct_common_change_mtu, 549 .ndo_get_stats = cvm_oct_common_get_stats, 550#ifdef CONFIG_NET_POLL_CONTROLLER 551 .ndo_poll_controller = cvm_oct_poll_controller, 552#endif 553}; 554static const struct net_device_ops cvm_oct_rgmii_netdev_ops = { 555 .ndo_init = cvm_oct_rgmii_init, 556 .ndo_uninit = cvm_oct_rgmii_uninit, 557 .ndo_open = cvm_oct_rgmii_open, 558 .ndo_stop = cvm_oct_rgmii_stop, 559 .ndo_start_xmit = cvm_oct_xmit, 560 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 561 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 562 .ndo_do_ioctl = cvm_oct_ioctl, 563 .ndo_change_mtu = cvm_oct_common_change_mtu, 564 .ndo_get_stats = cvm_oct_common_get_stats, 565#ifdef CONFIG_NET_POLL_CONTROLLER 566 .ndo_poll_controller = cvm_oct_poll_controller, 567#endif 568}; 569static const struct net_device_ops cvm_oct_pow_netdev_ops = { 570 .ndo_init = cvm_oct_common_init, 571 .ndo_start_xmit = cvm_oct_xmit_pow, 572 .ndo_set_rx_mode = cvm_oct_common_set_multicast_list, 573 .ndo_set_mac_address = cvm_oct_common_set_mac_address, 574 .ndo_do_ioctl = cvm_oct_ioctl, 575 .ndo_change_mtu = cvm_oct_common_change_mtu, 576 .ndo_get_stats = cvm_oct_common_get_stats, 577#ifdef CONFIG_NET_POLL_CONTROLLER 578 .ndo_poll_controller = cvm_oct_poll_controller, 579#endif 580}; 581 582extern void octeon_mdiobus_force_mod_depencency(void); 583 584static struct device_node *cvm_oct_of_get_child( 585 const struct device_node *parent, int reg_val) 586{ 587 struct device_node *node = NULL; 588 int size; 589 const __be32 *addr; 590 591 for (;;) { 592 node = of_get_next_child(parent, node); 593 if (!node) 594 break; 595 addr = of_get_property(node, "reg", &size); 596 if (addr && (be32_to_cpu(*addr) == reg_val)) 597 break; 598 } 599 return node; 600} 601 602static struct device_node *cvm_oct_node_for_port(struct device_node *pip, 603 int interface, int port) 604{ 605 struct device_node *ni, *np; 606 607 ni = cvm_oct_of_get_child(pip, interface); 608 if (!ni) 609 return NULL; 610 611 np = cvm_oct_of_get_child(ni, port); 612 of_node_put(ni); 613 614 return np; 615} 616 617static int cvm_oct_probe(struct platform_device *pdev) 618{ 619 int num_interfaces; 620 int interface; 621 int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE; 622 int qos; 623 struct device_node *pip; 624 625 octeon_mdiobus_force_mod_depencency(); 626 pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION); 627 628 pip = pdev->dev.of_node; 629 if (!pip) { 630 pr_err("Error: No 'pip' in /aliases\n"); 631 return -EINVAL; 632 } 633 634 cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet"); 635 if (cvm_oct_poll_queue == NULL) { 636 pr_err("octeon-ethernet: Cannot create workqueue"); 637 return -ENOMEM; 638 } 639 640 cvm_oct_configure_common_hw(); 641 642 cvmx_helper_initialize_packet_io_global(); 643 644 /* Change the input group for all ports before input is enabled */ 645 num_interfaces = cvmx_helper_get_number_of_interfaces(); 646 for (interface = 0; interface < num_interfaces; interface++) { 647 int num_ports = cvmx_helper_ports_on_interface(interface); 648 int port; 649 650 for (port = cvmx_helper_get_ipd_port(interface, 0); 651 port < cvmx_helper_get_ipd_port(interface, num_ports); 652 port++) { 653 union cvmx_pip_prt_tagx pip_prt_tagx; 654 655 pip_prt_tagx.u64 = 656 cvmx_read_csr(CVMX_PIP_PRT_TAGX(port)); 657 pip_prt_tagx.s.grp = pow_receive_group; 658 cvmx_write_csr(CVMX_PIP_PRT_TAGX(port), 659 pip_prt_tagx.u64); 660 } 661 } 662 663 cvmx_helper_ipd_and_packet_input_enable(); 664 665 memset(cvm_oct_device, 0, sizeof(cvm_oct_device)); 666 667 /* 668 * Initialize the FAU used for counting packet buffers that 669 * need to be freed. 670 */ 671 cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0); 672 673 /* Initialize the FAU used for counting tx SKBs that need to be freed */ 674 cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0); 675 676 if ((pow_send_group != -1)) { 677 struct net_device *dev; 678 679 pr_info("\tConfiguring device for POW only access\n"); 680 dev = alloc_etherdev(sizeof(struct octeon_ethernet)); 681 if (dev) { 682 /* Initialize the device private structure. */ 683 struct octeon_ethernet *priv = netdev_priv(dev); 684 685 dev->netdev_ops = &cvm_oct_pow_netdev_ops; 686 priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED; 687 priv->port = CVMX_PIP_NUM_INPUT_PORTS; 688 priv->queue = -1; 689 strcpy(dev->name, "pow%d"); 690 for (qos = 0; qos < 16; qos++) 691 skb_queue_head_init(&priv->tx_free_list[qos]); 692 693 if (register_netdev(dev) < 0) { 694 pr_err("Failed to register ethernet device for POW\n"); 695 free_netdev(dev); 696 } else { 697 cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev; 698 pr_info("%s: POW send group %d, receive group %d\n", 699 dev->name, pow_send_group, 700 pow_receive_group); 701 } 702 } else { 703 pr_err("Failed to allocate ethernet device for POW\n"); 704 } 705 } 706 707 num_interfaces = cvmx_helper_get_number_of_interfaces(); 708 for (interface = 0; interface < num_interfaces; interface++) { 709 cvmx_helper_interface_mode_t imode = 710 cvmx_helper_interface_get_mode(interface); 711 int num_ports = cvmx_helper_ports_on_interface(interface); 712 int port; 713 int port_index; 714 715 for (port_index = 0, 716 port = cvmx_helper_get_ipd_port(interface, 0); 717 port < cvmx_helper_get_ipd_port(interface, num_ports); 718 port_index++, port++) { 719 struct octeon_ethernet *priv; 720 struct net_device *dev = 721 alloc_etherdev(sizeof(struct octeon_ethernet)); 722 if (!dev) { 723 pr_err("Failed to allocate ethernet device for port %d\n", port); 724 continue; 725 } 726 727 /* Initialize the device private structure. */ 728 priv = netdev_priv(dev); 729 priv->netdev = dev; 730 priv->of_node = cvm_oct_node_for_port(pip, interface, 731 port_index); 732 733 INIT_DELAYED_WORK(&priv->port_periodic_work, 734 cvm_oct_periodic_worker); 735 priv->imode = imode; 736 priv->port = port; 737 priv->queue = cvmx_pko_get_base_queue(priv->port); 738 priv->fau = fau - cvmx_pko_get_num_queues(port) * 4; 739 for (qos = 0; qos < 16; qos++) 740 skb_queue_head_init(&priv->tx_free_list[qos]); 741 for (qos = 0; qos < cvmx_pko_get_num_queues(port); 742 qos++) 743 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0); 744 745 switch (priv->imode) { 746 747 /* These types don't support ports to IPD/PKO */ 748 case CVMX_HELPER_INTERFACE_MODE_DISABLED: 749 case CVMX_HELPER_INTERFACE_MODE_PCIE: 750 case CVMX_HELPER_INTERFACE_MODE_PICMG: 751 break; 752 753 case CVMX_HELPER_INTERFACE_MODE_NPI: 754 dev->netdev_ops = &cvm_oct_npi_netdev_ops; 755 strcpy(dev->name, "npi%d"); 756 break; 757 758 case CVMX_HELPER_INTERFACE_MODE_XAUI: 759 dev->netdev_ops = &cvm_oct_xaui_netdev_ops; 760 strcpy(dev->name, "xaui%d"); 761 break; 762 763 case CVMX_HELPER_INTERFACE_MODE_LOOP: 764 dev->netdev_ops = &cvm_oct_npi_netdev_ops; 765 strcpy(dev->name, "loop%d"); 766 break; 767 768 case CVMX_HELPER_INTERFACE_MODE_SGMII: 769 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops; 770 strcpy(dev->name, "eth%d"); 771 break; 772 773 case CVMX_HELPER_INTERFACE_MODE_SPI: 774 dev->netdev_ops = &cvm_oct_spi_netdev_ops; 775 strcpy(dev->name, "spi%d"); 776 break; 777 778 case CVMX_HELPER_INTERFACE_MODE_RGMII: 779 case CVMX_HELPER_INTERFACE_MODE_GMII: 780 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops; 781 strcpy(dev->name, "eth%d"); 782 break; 783 } 784 785 if (!dev->netdev_ops) { 786 free_netdev(dev); 787 } else if (register_netdev(dev) < 0) { 788 pr_err("Failed to register ethernet device " 789 "for interface %d, port %d\n", 790 interface, priv->port); 791 free_netdev(dev); 792 } else { 793 cvm_oct_device[priv->port] = dev; 794 fau -= 795 cvmx_pko_get_num_queues(priv->port) * 796 sizeof(uint32_t); 797 queue_delayed_work(cvm_oct_poll_queue, 798 &priv->port_periodic_work, HZ); 799 } 800 } 801 } 802 803 cvm_oct_tx_initialize(); 804 cvm_oct_rx_initialize(); 805 806 /* 807 * 150 uS: about 10 1500-byte packtes at 1GE. 808 */ 809 cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000); 810 811 queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ); 812 813 return 0; 814} 815 816static int cvm_oct_remove(struct platform_device *pdev) 817{ 818 int port; 819 820 /* Disable POW interrupt */ 821 cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0); 822 823 cvmx_ipd_disable(); 824 825 /* Free the interrupt handler */ 826 free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device); 827 828 atomic_inc_return(&cvm_oct_poll_queue_stopping); 829 cancel_delayed_work_sync(&cvm_oct_rx_refill_work); 830 831 cvm_oct_rx_shutdown(); 832 cvm_oct_tx_shutdown(); 833 834 cvmx_pko_disable(); 835 836 /* Free the ethernet devices */ 837 for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) { 838 if (cvm_oct_device[port]) { 839 struct net_device *dev = cvm_oct_device[port]; 840 struct octeon_ethernet *priv = netdev_priv(dev); 841 842 cancel_delayed_work_sync(&priv->port_periodic_work); 843 844 cvm_oct_tx_shutdown_dev(dev); 845 unregister_netdev(dev); 846 free_netdev(dev); 847 cvm_oct_device[port] = NULL; 848 } 849 } 850 851 destroy_workqueue(cvm_oct_poll_queue); 852 853 cvmx_pko_shutdown(); 854 855 cvmx_ipd_free_ptr(); 856 857 /* Free the HW pools */ 858 cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, 859 num_packet_buffers); 860 cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE, 861 num_packet_buffers); 862 if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL) 863 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL, 864 CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128); 865 return 0; 866} 867 868static struct of_device_id cvm_oct_match[] = { 869 { 870 .compatible = "cavium,octeon-3860-pip", 871 }, 872 {}, 873}; 874MODULE_DEVICE_TABLE(of, cvm_oct_match); 875 876static struct platform_driver cvm_oct_driver = { 877 .probe = cvm_oct_probe, 878 .remove = cvm_oct_remove, 879 .driver = { 880 .owner = THIS_MODULE, 881 .name = KBUILD_MODNAME, 882 .of_match_table = cvm_oct_match, 883 }, 884}; 885 886module_platform_driver(cvm_oct_driver); 887 888MODULE_LICENSE("GPL"); 889MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>"); 890MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver."); 891