1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2018 Solarflare Communications Inc.
5 * Copyright 2019-2020 Xilinx Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation, incorporated herein by reference.
11 #include "net_driver.h"
12 #include "mcdi_port_common.h"
13 #include "mcdi_functions.h"
14 #include "efx_common.h"
15 #include "efx_channels.h"
16 #include "tx_common.h"
17 #include "ef100_netdev.h"
18 #include "ef100_ethtool.h"
19 #include "nic_common.h"
20 #include "ef100_nic.h"
22 #include "ef100_regs.h"
23 #include "mcdi_filters.h"
24 #include "rx_common.h"
25 #include "ef100_sriov.h"
27 static void ef100_update_name(struct efx_nic *efx)
29 strcpy(efx->name, efx->net_dev->name);
32 static int ef100_alloc_vis(struct efx_nic *efx, unsigned int *allocated_vis)
34 /* EF100 uses a single TXQ per channel, as all checksum offloading
35 * is configured in the TX descriptor, and there is no TX Pacer for
38 unsigned int tx_vis = efx->n_tx_channels + efx->n_extra_tx_channels;
39 unsigned int rx_vis = efx->n_rx_channels;
40 unsigned int min_vis, max_vis;
42 EFX_WARN_ON_PARANOID(efx->tx_queues_per_channel != 1);
44 tx_vis += efx->n_xdp_channels * efx->xdp_tx_per_channel;
46 max_vis = max(rx_vis, tx_vis);
47 /* Currently don't handle resource starvation and only accept
48 * our maximum needs and no less.
52 return efx_mcdi_alloc_vis(efx, min_vis, max_vis,
56 static int ef100_remap_bar(struct efx_nic *efx, int max_vis)
58 unsigned int uc_mem_map_size;
59 void __iomem *membase;
61 efx->max_vis = max_vis;
62 uc_mem_map_size = PAGE_ALIGN(max_vis * efx->vi_stride);
64 /* Extend the original UC mapping of the memory BAR */
65 membase = ioremap(efx->membase_phys, uc_mem_map_size);
67 netif_err(efx, probe, efx->net_dev,
68 "could not extend memory BAR to %x\n",
72 iounmap(efx->membase);
73 efx->membase = membase;
77 /* Context: process, rtnl_lock() held.
78 * Note that the kernel will ignore our return code; this method
79 * should really be a void.
81 static int ef100_net_stop(struct net_device *net_dev)
83 struct efx_nic *efx = efx_netdev_priv(net_dev);
85 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
86 raw_smp_processor_id());
89 netif_stop_queue(net_dev);
91 efx_mcdi_mac_fini_stats(efx);
92 efx_disable_interrupts(efx);
93 efx_clear_interrupt_affinity(efx);
94 efx_nic_fini_interrupt(efx);
95 efx_remove_filters(efx);
97 efx_remove_channels(efx);
98 efx_mcdi_free_vis(efx);
99 efx_remove_interrupts(efx);
101 efx->state = STATE_NET_DOWN;
106 /* Context: process, rtnl_lock() held. */
107 static int ef100_net_open(struct net_device *net_dev)
109 struct efx_nic *efx = efx_netdev_priv(net_dev);
110 unsigned int allocated_vis;
113 ef100_update_name(efx);
114 netif_dbg(efx, ifup, net_dev, "opening device on CPU %d\n",
115 raw_smp_processor_id());
117 rc = efx_check_disabled(efx);
121 rc = efx_probe_interrupts(efx);
125 rc = efx_set_channels(efx);
129 rc = efx_mcdi_free_vis(efx);
133 rc = ef100_alloc_vis(efx, &allocated_vis);
137 rc = efx_probe_channels(efx);
141 rc = ef100_remap_bar(efx, allocated_vis);
147 rc = efx_probe_filters(efx);
151 rc = efx_nic_init_interrupt(efx);
154 efx_set_interrupt_affinity(efx);
156 rc = efx_enable_interrupts(efx);
160 /* in case the MC rebooted while we were stopped, consume the change
161 * to the warm reboot count
163 (void) efx_mcdi_poll_reboot(efx);
165 rc = efx_mcdi_mac_init_stats(efx);
171 /* Link state detection is normally event-driven; we have
172 * to poll now because we could have missed a change
174 mutex_lock(&efx->mac_lock);
175 if (efx_mcdi_phy_poll(efx))
176 efx_link_status_changed(efx);
177 mutex_unlock(&efx->mac_lock);
179 efx->state = STATE_NET_UP;
180 if (netif_running(efx->net_dev))
181 efx_attach_reps(efx);
186 ef100_net_stop(net_dev);
190 /* Initiate a packet transmission. We use one channel per CPU
191 * (sharing when we have more CPUs than channels).
193 * Context: non-blocking.
194 * Note that returning anything other than NETDEV_TX_OK will cause the
195 * OS to free the skb.
197 static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
198 struct net_device *net_dev)
200 struct efx_nic *efx = efx_netdev_priv(net_dev);
202 return __ef100_hard_start_xmit(skb, efx, net_dev, NULL);
205 netdev_tx_t __ef100_hard_start_xmit(struct sk_buff *skb,
207 struct net_device *net_dev,
210 struct efx_tx_queue *tx_queue;
211 struct efx_channel *channel;
214 channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb));
215 netif_vdbg(efx, tx_queued, efx->net_dev,
216 "%s len %d data %d channel %d\n", __func__,
217 skb->len, skb->data_len, channel->channel);
218 if (!efx->n_channels || !efx->n_tx_channels || !channel) {
219 netif_stop_queue(net_dev);
223 tx_queue = &channel->tx_queue[0];
224 rc = __ef100_enqueue_skb(tx_queue, skb, efv);
229 net_dev->stats.tx_dropped++;
233 static const struct net_device_ops ef100_netdev_ops = {
234 .ndo_open = ef100_net_open,
235 .ndo_stop = ef100_net_stop,
236 .ndo_start_xmit = ef100_hard_start_xmit,
237 .ndo_tx_timeout = efx_watchdog,
238 .ndo_get_stats64 = efx_net_stats,
239 .ndo_change_mtu = efx_change_mtu,
240 .ndo_validate_addr = eth_validate_addr,
241 .ndo_set_mac_address = efx_set_mac_address,
242 .ndo_set_rx_mode = efx_set_rx_mode, /* Lookout */
243 .ndo_set_features = efx_set_features,
244 .ndo_get_phys_port_id = efx_get_phys_port_id,
245 .ndo_get_phys_port_name = efx_get_phys_port_name,
246 #ifdef CONFIG_RFS_ACCEL
247 .ndo_rx_flow_steer = efx_filter_rfs,
251 /* Netdev registration
253 int ef100_netdev_event(struct notifier_block *this,
254 unsigned long event, void *ptr)
256 struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier);
257 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
259 if (efx->net_dev == net_dev &&
260 (event == NETDEV_CHANGENAME || event == NETDEV_REGISTER))
261 ef100_update_name(efx);
266 static int ef100_register_netdev(struct efx_nic *efx)
268 struct net_device *net_dev = efx->net_dev;
271 net_dev->watchdog_timeo = 5 * HZ;
272 net_dev->irq = efx->pci_dev->irq;
273 net_dev->netdev_ops = &ef100_netdev_ops;
274 net_dev->min_mtu = EFX_MIN_MTU;
275 net_dev->max_mtu = EFX_MAX_MTU;
276 net_dev->ethtool_ops = &ef100_ethtool_ops;
280 rc = dev_alloc_name(net_dev, net_dev->name);
283 ef100_update_name(efx);
285 rc = register_netdevice(net_dev);
289 /* Always start with carrier off; PHY events will detect the link */
290 netif_carrier_off(net_dev);
292 efx->state = STATE_NET_DOWN;
294 efx_init_mcdi_logging(efx);
300 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
304 static void ef100_unregister_netdev(struct efx_nic *efx)
306 if (efx_dev_registered(efx)) {
307 efx_fini_mcdi_logging(efx);
308 efx->state = STATE_PROBED;
309 unregister_netdev(efx->net_dev);
313 void ef100_remove_netdev(struct efx_probe_data *probe_data)
315 struct efx_nic *efx = &probe_data->efx;
321 dev_close(efx->net_dev);
324 unregister_netdevice_notifier(&efx->netdev_notifier);
325 #if defined(CONFIG_SFC_SRIOV)
326 if (!efx->type->is_vf)
327 efx_ef100_pci_sriov_disable(efx, true);
330 ef100_unregister_netdev(efx);
332 #ifdef CONFIG_SFC_SRIOV
336 down_write(&efx->filter_sem);
337 efx_mcdi_filter_table_remove(efx);
338 up_write(&efx->filter_sem);
339 efx_fini_channels(efx);
340 kfree(efx->phy_data);
341 efx->phy_data = NULL;
343 free_netdev(efx->net_dev);
345 efx->state = STATE_PROBED;
348 int ef100_probe_netdev(struct efx_probe_data *probe_data)
350 struct efx_nic *efx = &probe_data->efx;
351 struct efx_probe_data **probe_ptr;
352 struct net_device *net_dev;
355 if (efx->mcdi->fn_flags &
356 (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
357 pci_info(efx->pci_dev, "No network port on this PCI function");
361 /* Allocate and initialise a struct net_device */
362 net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
365 probe_ptr = netdev_priv(net_dev);
366 *probe_ptr = probe_data;
367 efx->net_dev = net_dev;
368 SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
370 net_dev->features |= efx->type->offload_features;
371 net_dev->hw_features |= efx->type->offload_features;
372 net_dev->hw_enc_features |= efx->type->offload_features;
373 net_dev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_SG |
374 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO;
375 netif_set_tso_max_segs(net_dev,
376 ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS_DEFAULT);
377 efx->mdio.dev = net_dev;
379 rc = efx_ef100_init_datapath_caps(efx);
383 rc = ef100_phy_probe(efx);
387 rc = efx_init_channels(efx);
391 down_write(&efx->filter_sem);
392 rc = ef100_filter_table_probe(efx);
393 up_write(&efx->filter_sem);
397 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
398 sizeof(efx->rss_context.rx_hash_key));
400 /* Don't fail init if RSS setup doesn't work. */
401 efx_mcdi_push_default_indir_table(efx, efx->n_rx_channels);
403 rc = ef100_register_netdev(efx);
407 if (!efx->type->is_vf) {
408 rc = ef100_probe_netdev_pf(efx);
413 efx->netdev_notifier.notifier_call = ef100_netdev_event;
414 rc = register_netdevice_notifier(&efx->netdev_notifier);
416 netif_err(efx, probe, efx->net_dev,
417 "Failed to register netdevice notifier, rc=%d\n", rc);