Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

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 static int num_packet_buffers = 1024;
 59 module_param(num_packet_buffers, int, 0444);
 60 MODULE_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 
 64 int pow_receive_group = 15;
 65 module_param(pow_receive_group, int, 0444);
 66 MODULE_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 
 72 int pow_send_group = -1;
 73 module_param(pow_send_group, int, 0644);
 74 MODULE_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 
 79 int always_use_pow;
 80 module_param(always_use_pow, int, 0444);
 81 MODULE_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 
 91 char pow_send_list[128] = "";
 92 module_param_string(pow_send_list, pow_send_list, sizeof(pow_send_list), 0444);
 93 MODULE_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 
101 int rx_napi_weight = 32;
102 module_param(rx_napi_weight, int, 0444);
103 MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter.");
104 
105 /**
106  * cvm_oct_poll_queue - Workqueue for polling operations.
107  */
108 struct workqueue_struct *cvm_oct_poll_queue;
109 
110 /**
111  * cvm_oct_poll_queue_stopping - flag to indicate polling should stop.
112  *
113  * Set to one right before cvm_oct_poll_queue is destroyed.
114  */
115 atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0);
116 
117 /**
118  * Array of every ethernet device owned by this driver indexed by
119  * the ipd input port number.
120  */
121 struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS];
122 
123 u64 cvm_oct_tx_poll_interval;
124 
125 static void cvm_oct_rx_refill_worker(struct work_struct *work);
126 static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker);
127 
128 static void cvm_oct_rx_refill_worker(struct work_struct *work)
129 {
130         /*
131          * FPA 0 may have been drained, try to refill it if we need
132          * more than num_packet_buffers / 2, otherwise normal receive
133          * processing will refill it.  If it were drained, no packets
134          * could be received so cvm_oct_napi_poll would never be
135          * invoked to do the refill.
136          */
137         cvm_oct_rx_refill_pool(num_packet_buffers / 2);
138 
139         if (!atomic_read(&cvm_oct_poll_queue_stopping))
140                 queue_delayed_work(cvm_oct_poll_queue,
141                                    &cvm_oct_rx_refill_work, HZ);
142 }
143 
144 static void cvm_oct_periodic_worker(struct work_struct *work)
145 {
146         struct octeon_ethernet *priv = container_of(work,
147                                                     struct octeon_ethernet,
148                                                     port_periodic_work.work);
149 
150         if (priv->poll)
151                 priv->poll(cvm_oct_device[priv->port]);
152 
153         cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(
154                                                 cvm_oct_device[priv->port]);
155 
156         if (!atomic_read(&cvm_oct_poll_queue_stopping))
157                 queue_delayed_work(cvm_oct_poll_queue,
158                                                 &priv->port_periodic_work, HZ);
159 }
160 
161 static void cvm_oct_configure_common_hw(void)
162 {
163         /* Setup the FPA */
164         cvmx_fpa_enable();
165         cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
166                              num_packet_buffers);
167         cvm_oct_mem_fill_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
168                              num_packet_buffers);
169         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
170                 cvm_oct_mem_fill_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
171                                      CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
172 
173 #ifdef __LITTLE_ENDIAN
174         {
175                 union cvmx_ipd_ctl_status ipd_ctl_status;
176                 ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
177                 ipd_ctl_status.s.pkt_lend = 1;
178                 ipd_ctl_status.s.wqe_lend = 1;
179                 cvmx_write_csr(CVMX_IPD_CTL_STATUS, ipd_ctl_status.u64);
180         }
181 #endif
182 
183         if (USE_RED)
184                 cvmx_helper_setup_red(num_packet_buffers / 4,
185                                       num_packet_buffers / 8);
186 
187 }
188 
189 /**
190  * cvm_oct_free_work- Free a work queue entry
191  *
192  * @work_queue_entry: Work queue entry to free
193  *
194  * Returns Zero on success, Negative on failure.
195  */
196 int cvm_oct_free_work(void *work_queue_entry)
197 {
198         cvmx_wqe_t *work = work_queue_entry;
199 
200         int segments = work->word2.s.bufs;
201         union cvmx_buf_ptr segment_ptr = work->packet_ptr;
202 
203         while (segments--) {
204                 union cvmx_buf_ptr next_ptr = *(union cvmx_buf_ptr *)
205                         cvmx_phys_to_ptr(segment_ptr.s.addr - 8);
206                 if (unlikely(!segment_ptr.s.i))
207                         cvmx_fpa_free(cvm_oct_get_buffer_ptr(segment_ptr),
208                                       segment_ptr.s.pool,
209                                       DONT_WRITEBACK(CVMX_FPA_PACKET_POOL_SIZE /
210                                                      128));
211                 segment_ptr = next_ptr;
212         }
213         cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
214 
215         return 0;
216 }
217 EXPORT_SYMBOL(cvm_oct_free_work);
218 
219 /**
220  * cvm_oct_common_get_stats - get the low level ethernet statistics
221  * @dev:    Device to get the statistics from
222  *
223  * Returns Pointer to the statistics
224  */
225 static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev)
226 {
227         cvmx_pip_port_status_t rx_status;
228         cvmx_pko_port_status_t tx_status;
229         struct octeon_ethernet *priv = netdev_priv(dev);
230 
231         if (priv->port < CVMX_PIP_NUM_INPUT_PORTS) {
232                 if (octeon_is_simulation()) {
233                         /* The simulator doesn't support statistics */
234                         memset(&rx_status, 0, sizeof(rx_status));
235                         memset(&tx_status, 0, sizeof(tx_status));
236                 } else {
237                         cvmx_pip_get_port_status(priv->port, 1, &rx_status);
238                         cvmx_pko_get_port_status(priv->port, 1, &tx_status);
239                 }
240 
241                 priv->stats.rx_packets += rx_status.inb_packets;
242                 priv->stats.tx_packets += tx_status.packets;
243                 priv->stats.rx_bytes += rx_status.inb_octets;
244                 priv->stats.tx_bytes += tx_status.octets;
245                 priv->stats.multicast += rx_status.multicast_packets;
246                 priv->stats.rx_crc_errors += rx_status.inb_errors;
247                 priv->stats.rx_frame_errors += rx_status.fcs_align_err_packets;
248 
249                 /*
250                  * The drop counter must be incremented atomically
251                  * since the RX tasklet also increments it.
252                  */
253 #ifdef CONFIG_64BIT
254                 atomic64_add(rx_status.dropped_packets,
255                              (atomic64_t *)&priv->stats.rx_dropped);
256 #else
257                 atomic_add(rx_status.dropped_packets,
258                              (atomic_t *)&priv->stats.rx_dropped);
259 #endif
260         }
261 
262         return &priv->stats;
263 }
264 
265 /**
266  * cvm_oct_common_change_mtu - change the link MTU
267  * @dev:     Device to change
268  * @new_mtu: The new MTU
269  *
270  * Returns Zero on success
271  */
272 static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu)
273 {
274         struct octeon_ethernet *priv = netdev_priv(dev);
275         int interface = INTERFACE(priv->port);
276         int index = INDEX(priv->port);
277 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
278         int vlan_bytes = 4;
279 #else
280         int vlan_bytes = 0;
281 #endif
282 
283         /*
284          * Limit the MTU to make sure the ethernet packets are between
285          * 64 bytes and 65535 bytes.
286          */
287         if ((new_mtu + 14 + 4 + vlan_bytes < 64)
288             || (new_mtu + 14 + 4 + vlan_bytes > 65392)) {
289                 pr_err("MTU must be between %d and %d.\n",
290                        64 - 14 - 4 - vlan_bytes, 65392 - 14 - 4 - vlan_bytes);
291                 return -EINVAL;
292         }
293         dev->mtu = new_mtu;
294 
295         if ((interface < 2)
296             && (cvmx_helper_interface_get_mode(interface) !=
297                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
298                 /* Add ethernet header and FCS, and VLAN if configured. */
299                 int max_packet = new_mtu + 14 + 4 + vlan_bytes;
300 
301                 if (OCTEON_IS_MODEL(OCTEON_CN3XXX)
302                     || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
303                         /* Signal errors on packets larger than the MTU */
304                         cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(index, interface),
305                                        max_packet);
306                 } else {
307                         /*
308                          * Set the hardware to truncate packets larger
309                          * than the MTU and smaller the 64 bytes.
310                          */
311                         union cvmx_pip_frm_len_chkx frm_len_chk;
312 
313                         frm_len_chk.u64 = 0;
314                         frm_len_chk.s.minlen = 64;
315                         frm_len_chk.s.maxlen = max_packet;
316                         cvmx_write_csr(CVMX_PIP_FRM_LEN_CHKX(interface),
317                                        frm_len_chk.u64);
318                 }
319                 /*
320                  * Set the hardware to truncate packets larger than
321                  * the MTU. The jabber register must be set to a
322                  * multiple of 8 bytes, so round up.
323                  */
324                 cvmx_write_csr(CVMX_GMXX_RXX_JABBER(index, interface),
325                                (max_packet + 7) & ~7u);
326         }
327         return 0;
328 }
329 
330 /**
331  * cvm_oct_common_set_multicast_list - set the multicast list
332  * @dev:    Device to work on
333  */
334 static void cvm_oct_common_set_multicast_list(struct net_device *dev)
335 {
336         union cvmx_gmxx_prtx_cfg gmx_cfg;
337         struct octeon_ethernet *priv = netdev_priv(dev);
338         int interface = INTERFACE(priv->port);
339         int index = INDEX(priv->port);
340 
341         if ((interface < 2)
342             && (cvmx_helper_interface_get_mode(interface) !=
343                 CVMX_HELPER_INTERFACE_MODE_SPI)) {
344                 union cvmx_gmxx_rxx_adr_ctl control;
345 
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 
407                 for (i = 0; i < 6; i++)
408                         mac = (mac << 8) | (uint64_t)ptr[i];
409 
410                 gmx_cfg.u64 =
411                     cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
412                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
413                                gmx_cfg.u64 & ~1ull);
414 
415                 cvmx_write_csr(CVMX_GMXX_SMACX(index, interface), mac);
416                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM0(index, interface),
417                                ptr[0]);
418                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM1(index, interface),
419                                ptr[1]);
420                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM2(index, interface),
421                                ptr[2]);
422                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM3(index, interface),
423                                ptr[3]);
424                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM4(index, interface),
425                                ptr[4]);
426                 cvmx_write_csr(CVMX_GMXX_RXX_ADR_CAM5(index, interface),
427                                ptr[5]);
428                 cvm_oct_common_set_multicast_list(dev);
429                 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
430                                gmx_cfg.u64);
431         }
432         return 0;
433 }
434 
435 static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr)
436 {
437         int r = eth_mac_addr(dev, addr);
438 
439         if (r)
440                 return r;
441         return cvm_oct_set_mac_filter(dev);
442 }
443 
444 /**
445  * cvm_oct_common_init - per network device initialization
446  * @dev:    Device to initialize
447  *
448  * Returns Zero on success
449  */
450 int cvm_oct_common_init(struct net_device *dev)
451 {
452         struct octeon_ethernet *priv = netdev_priv(dev);
453         const u8 *mac = NULL;
454 
455         if (priv->of_node)
456                 mac = of_get_mac_address(priv->of_node);
457 
458         if (mac)
459                 ether_addr_copy(dev->dev_addr, mac);
460         else
461                 eth_hw_addr_random(dev);
462 
463         /*
464          * Force the interface to use the POW send if always_use_pow
465          * was specified or it is in the pow send list.
466          */
467         if ((pow_send_group != -1)
468             && (always_use_pow || strstr(pow_send_list, dev->name)))
469                 priv->queue = -1;
470 
471         if (priv->queue != -1) {
472                 dev->features |= NETIF_F_SG;
473                 if (USE_HW_TCPUDP_CHECKSUM)
474                         dev->features |= NETIF_F_IP_CSUM;
475         }
476 
477         /* We do our own locking, Linux doesn't need to */
478         dev->features |= NETIF_F_LLTX;
479         dev->ethtool_ops = &cvm_oct_ethtool_ops;
480 
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 static struct device_node *cvm_oct_of_get_child(
587                                 const struct device_node *parent, int reg_val)
588 {
589         struct device_node *node = NULL;
590         int size;
591         const __be32 *addr;
592 
593         for (;;) {
594                 node = of_get_next_child(parent, node);
595                 if (!node)
596                         break;
597                 addr = of_get_property(node, "reg", &size);
598                 if (addr && (be32_to_cpu(*addr) == reg_val))
599                         break;
600         }
601         return node;
602 }
603 
604 static struct device_node *cvm_oct_node_for_port(struct device_node *pip,
605                                                         int interface, int port)
606 {
607         struct device_node *ni, *np;
608 
609         ni = cvm_oct_of_get_child(pip, interface);
610         if (!ni)
611                 return NULL;
612 
613         np = cvm_oct_of_get_child(ni, port);
614         of_node_put(ni);
615 
616         return np;
617 }
618 
619 static int cvm_oct_probe(struct platform_device *pdev)
620 {
621         int num_interfaces;
622         int interface;
623         int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
624         int qos;
625         struct device_node *pip;
626 
627         octeon_mdiobus_force_mod_depencency();
628         pr_notice("cavium-ethernet %s\n", OCTEON_ETHERNET_VERSION);
629 
630         pip = pdev->dev.of_node;
631         if (!pip) {
632                 pr_err("Error: No 'pip' in /aliases\n");
633                 return -EINVAL;
634         }
635 
636         cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet");
637         if (cvm_oct_poll_queue == NULL) {
638                 pr_err("octeon-ethernet: Cannot create workqueue");
639                 return -ENOMEM;
640         }
641 
642         cvm_oct_configure_common_hw();
643 
644         cvmx_helper_initialize_packet_io_global();
645 
646         /* Change the input group for all ports before input is enabled */
647         num_interfaces = cvmx_helper_get_number_of_interfaces();
648         for (interface = 0; interface < num_interfaces; interface++) {
649                 int num_ports = cvmx_helper_ports_on_interface(interface);
650                 int port;
651 
652                 for (port = cvmx_helper_get_ipd_port(interface, 0);
653                      port < cvmx_helper_get_ipd_port(interface, num_ports);
654                      port++) {
655                         union cvmx_pip_prt_tagx pip_prt_tagx;
656 
657                         pip_prt_tagx.u64 =
658                             cvmx_read_csr(CVMX_PIP_PRT_TAGX(port));
659                         pip_prt_tagx.s.grp = pow_receive_group;
660                         cvmx_write_csr(CVMX_PIP_PRT_TAGX(port),
661                                        pip_prt_tagx.u64);
662                 }
663         }
664 
665         cvmx_helper_ipd_and_packet_input_enable();
666 
667         memset(cvm_oct_device, 0, sizeof(cvm_oct_device));
668 
669         /*
670          * Initialize the FAU used for counting packet buffers that
671          * need to be freed.
672          */
673         cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
674 
675         /* Initialize the FAU used for counting tx SKBs that need to be freed */
676         cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0);
677 
678         if ((pow_send_group != -1)) {
679                 struct net_device *dev;
680 
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",
726                                        port);
727                                 continue;
728                         }
729 
730                         /* Initialize the device private structure. */
731                         priv = netdev_priv(dev);
732                         priv->netdev = dev;
733                         priv->of_node = cvm_oct_node_for_port(pip, interface,
734                                                                 port_index);
735 
736                         INIT_DELAYED_WORK(&priv->port_periodic_work,
737                                           cvm_oct_periodic_worker);
738                         priv->imode = imode;
739                         priv->port = port;
740                         priv->queue = cvmx_pko_get_base_queue(priv->port);
741                         priv->fau = fau - cvmx_pko_get_num_queues(port) * 4;
742                         for (qos = 0; qos < 16; qos++)
743                                 skb_queue_head_init(&priv->tx_free_list[qos]);
744                         for (qos = 0; qos < cvmx_pko_get_num_queues(port);
745                              qos++)
746                                 cvmx_fau_atomic_write32(priv->fau + qos * 4, 0);
747 
748                         switch (priv->imode) {
749 
750                         /* These types don't support ports to IPD/PKO */
751                         case CVMX_HELPER_INTERFACE_MODE_DISABLED:
752                         case CVMX_HELPER_INTERFACE_MODE_PCIE:
753                         case CVMX_HELPER_INTERFACE_MODE_PICMG:
754                                 break;
755 
756                         case CVMX_HELPER_INTERFACE_MODE_NPI:
757                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
758                                 strcpy(dev->name, "npi%d");
759                                 break;
760 
761                         case CVMX_HELPER_INTERFACE_MODE_XAUI:
762                                 dev->netdev_ops = &cvm_oct_xaui_netdev_ops;
763                                 strcpy(dev->name, "xaui%d");
764                                 break;
765 
766                         case CVMX_HELPER_INTERFACE_MODE_LOOP:
767                                 dev->netdev_ops = &cvm_oct_npi_netdev_ops;
768                                 strcpy(dev->name, "loop%d");
769                                 break;
770 
771                         case CVMX_HELPER_INTERFACE_MODE_SGMII:
772                                 dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
773                                 strcpy(dev->name, "eth%d");
774                                 break;
775 
776                         case CVMX_HELPER_INTERFACE_MODE_SPI:
777                                 dev->netdev_ops = &cvm_oct_spi_netdev_ops;
778                                 strcpy(dev->name, "spi%d");
779                                 break;
780 
781                         case CVMX_HELPER_INTERFACE_MODE_RGMII:
782                         case CVMX_HELPER_INTERFACE_MODE_GMII:
783                                 dev->netdev_ops = &cvm_oct_rgmii_netdev_ops;
784                                 strcpy(dev->name, "eth%d");
785                                 break;
786                         }
787 
788                         if (!dev->netdev_ops) {
789                                 free_netdev(dev);
790                         } else if (register_netdev(dev) < 0) {
791                                 pr_err("Failed to register ethernet device for interface %d, port %d\n",
792                                          interface, priv->port);
793                                 free_netdev(dev);
794                         } else {
795                                 cvm_oct_device[priv->port] = dev;
796                                 fau -=
797                                     cvmx_pko_get_num_queues(priv->port) *
798                                     sizeof(uint32_t);
799                                 queue_delayed_work(cvm_oct_poll_queue,
800                                                 &priv->port_periodic_work, HZ);
801                         }
802                 }
803         }
804 
805         cvm_oct_tx_initialize();
806         cvm_oct_rx_initialize();
807 
808         /*
809          * 150 uS: about 10 1500-byte packets at 1GE.
810          */
811         cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000);
812 
813         queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ);
814 
815         return 0;
816 }
817 
818 static int cvm_oct_remove(struct platform_device *pdev)
819 {
820         int port;
821 
822         /* Disable POW interrupt */
823         cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0);
824 
825         cvmx_ipd_disable();
826 
827         /* Free the interrupt handler */
828         free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device);
829 
830         atomic_inc_return(&cvm_oct_poll_queue_stopping);
831         cancel_delayed_work_sync(&cvm_oct_rx_refill_work);
832 
833         cvm_oct_rx_shutdown();
834         cvm_oct_tx_shutdown();
835 
836         cvmx_pko_disable();
837 
838         /* Free the ethernet devices */
839         for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
840                 if (cvm_oct_device[port]) {
841                         struct net_device *dev = cvm_oct_device[port];
842                         struct octeon_ethernet *priv = netdev_priv(dev);
843 
844                         cancel_delayed_work_sync(&priv->port_periodic_work);
845 
846                         cvm_oct_tx_shutdown_dev(dev);
847                         unregister_netdev(dev);
848                         free_netdev(dev);
849                         cvm_oct_device[port] = NULL;
850                 }
851         }
852 
853         destroy_workqueue(cvm_oct_poll_queue);
854 
855         cvmx_pko_shutdown();
856 
857         cvmx_ipd_free_ptr();
858 
859         /* Free the HW pools */
860         cvm_oct_mem_empty_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE,
861                               num_packet_buffers);
862         cvm_oct_mem_empty_fpa(CVMX_FPA_WQE_POOL, CVMX_FPA_WQE_POOL_SIZE,
863                               num_packet_buffers);
864         if (CVMX_FPA_OUTPUT_BUFFER_POOL != CVMX_FPA_PACKET_POOL)
865                 cvm_oct_mem_empty_fpa(CVMX_FPA_OUTPUT_BUFFER_POOL,
866                                       CVMX_FPA_OUTPUT_BUFFER_POOL_SIZE, 128);
867         return 0;
868 }
869 
870 static const struct of_device_id cvm_oct_match[] = {
871         {
872                 .compatible = "cavium,octeon-3860-pip",
873         },
874         {},
875 };
876 MODULE_DEVICE_TABLE(of, cvm_oct_match);
877 
878 static struct platform_driver cvm_oct_driver = {
879         .probe          = cvm_oct_probe,
880         .remove         = cvm_oct_remove,
881         .driver         = {
882                 .name   = KBUILD_MODNAME,
883                 .of_match_table = cvm_oct_match,
884         },
885 };
886 
887 module_platform_driver(cvm_oct_driver);
888 
889 MODULE_LICENSE("GPL");
890 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
891 MODULE_DESCRIPTION("Cavium Networks Octeon ethernet driver.");
892 

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