Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/staging/octeon/ethernet.c

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

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