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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/ethernet/sfc/ef100_netdev.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/sfc/ef100_netdev.c')
-rw-r--r--drivers/net/ethernet/sfc/ef100_netdev.c430
1 files changed, 430 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
new file mode 100644
index 000000000..c6b9ba680
--- /dev/null
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2018 Solarflare Communications Inc.
+ * Copyright 2019-2020 Xilinx Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+#include "net_driver.h"
+#include "mcdi_port_common.h"
+#include "mcdi_functions.h"
+#include "efx_common.h"
+#include "efx_channels.h"
+#include "tx_common.h"
+#include "ef100_netdev.h"
+#include "ef100_ethtool.h"
+#include "nic_common.h"
+#include "ef100_nic.h"
+#include "ef100_tx.h"
+#include "ef100_regs.h"
+#include "mcdi_filters.h"
+#include "rx_common.h"
+#include "ef100_sriov.h"
+#include "tc_bindings.h"
+
+static void ef100_update_name(struct efx_nic *efx)
+{
+ strcpy(efx->name, efx->net_dev->name);
+}
+
+static int ef100_alloc_vis(struct efx_nic *efx, unsigned int *allocated_vis)
+{
+ /* EF100 uses a single TXQ per channel, as all checksum offloading
+ * is configured in the TX descriptor, and there is no TX Pacer for
+ * HIGHPRI queues.
+ */
+ unsigned int tx_vis = efx->n_tx_channels + efx->n_extra_tx_channels;
+ unsigned int rx_vis = efx->n_rx_channels;
+ unsigned int min_vis, max_vis;
+
+ EFX_WARN_ON_PARANOID(efx->tx_queues_per_channel != 1);
+
+ tx_vis += efx->n_xdp_channels * efx->xdp_tx_per_channel;
+
+ max_vis = max(rx_vis, tx_vis);
+ /* Currently don't handle resource starvation and only accept
+ * our maximum needs and no less.
+ */
+ min_vis = max_vis;
+
+ return efx_mcdi_alloc_vis(efx, min_vis, max_vis,
+ NULL, allocated_vis);
+}
+
+static int ef100_remap_bar(struct efx_nic *efx, int max_vis)
+{
+ unsigned int uc_mem_map_size;
+ void __iomem *membase;
+
+ efx->max_vis = max_vis;
+ uc_mem_map_size = PAGE_ALIGN(max_vis * efx->vi_stride);
+
+ /* Extend the original UC mapping of the memory BAR */
+ membase = ioremap(efx->membase_phys, uc_mem_map_size);
+ if (!membase) {
+ netif_err(efx, probe, efx->net_dev,
+ "could not extend memory BAR to %x\n",
+ uc_mem_map_size);
+ return -ENOMEM;
+ }
+ iounmap(efx->membase);
+ efx->membase = membase;
+ return 0;
+}
+
+/* Context: process, rtnl_lock() held.
+ * Note that the kernel will ignore our return code; this method
+ * should really be a void.
+ */
+static int ef100_net_stop(struct net_device *net_dev)
+{
+ struct efx_nic *efx = efx_netdev_priv(net_dev);
+
+ netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
+ raw_smp_processor_id());
+
+ efx_detach_reps(efx);
+ netif_stop_queue(net_dev);
+ efx_stop_all(efx);
+ efx_mcdi_mac_fini_stats(efx);
+ efx_disable_interrupts(efx);
+ efx_clear_interrupt_affinity(efx);
+ efx_nic_fini_interrupt(efx);
+ efx_remove_filters(efx);
+ efx_fini_napi(efx);
+ efx_remove_channels(efx);
+ efx_mcdi_free_vis(efx);
+ efx_remove_interrupts(efx);
+
+ efx->state = STATE_NET_DOWN;
+
+ return 0;
+}
+
+/* Context: process, rtnl_lock() held. */
+static int ef100_net_open(struct net_device *net_dev)
+{
+ struct efx_nic *efx = efx_netdev_priv(net_dev);
+ unsigned int allocated_vis;
+ int rc;
+
+ ef100_update_name(efx);
+ netif_dbg(efx, ifup, net_dev, "opening device on CPU %d\n",
+ raw_smp_processor_id());
+
+ rc = efx_check_disabled(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_probe_interrupts(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_set_channels(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_mcdi_free_vis(efx);
+ if (rc)
+ goto fail;
+
+ rc = ef100_alloc_vis(efx, &allocated_vis);
+ if (rc)
+ goto fail;
+
+ rc = efx_probe_channels(efx);
+ if (rc)
+ return rc;
+
+ rc = ef100_remap_bar(efx, allocated_vis);
+ if (rc)
+ goto fail;
+
+ efx_init_napi(efx);
+
+ rc = efx_probe_filters(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_nic_init_interrupt(efx);
+ if (rc)
+ goto fail;
+ efx_set_interrupt_affinity(efx);
+
+ rc = efx_enable_interrupts(efx);
+ if (rc)
+ goto fail;
+
+ /* in case the MC rebooted while we were stopped, consume the change
+ * to the warm reboot count
+ */
+ (void) efx_mcdi_poll_reboot(efx);
+
+ rc = efx_mcdi_mac_init_stats(efx);
+ if (rc)
+ goto fail;
+
+ efx_start_all(efx);
+
+ /* Link state detection is normally event-driven; we have
+ * to poll now because we could have missed a change
+ */
+ mutex_lock(&efx->mac_lock);
+ if (efx_mcdi_phy_poll(efx))
+ efx_link_status_changed(efx);
+ mutex_unlock(&efx->mac_lock);
+
+ efx->state = STATE_NET_UP;
+ if (netif_running(efx->net_dev))
+ efx_attach_reps(efx);
+
+ return 0;
+
+fail:
+ ef100_net_stop(net_dev);
+ return rc;
+}
+
+/* Initiate a packet transmission. We use one channel per CPU
+ * (sharing when we have more CPUs than channels).
+ *
+ * Context: non-blocking.
+ * Note that returning anything other than NETDEV_TX_OK will cause the
+ * OS to free the skb.
+ */
+static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *net_dev)
+{
+ struct efx_nic *efx = efx_netdev_priv(net_dev);
+
+ return __ef100_hard_start_xmit(skb, efx, net_dev, NULL);
+}
+
+netdev_tx_t __ef100_hard_start_xmit(struct sk_buff *skb,
+ struct efx_nic *efx,
+ struct net_device *net_dev,
+ struct efx_rep *efv)
+{
+ struct efx_tx_queue *tx_queue;
+ struct efx_channel *channel;
+ int rc;
+
+ channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb));
+ netif_vdbg(efx, tx_queued, efx->net_dev,
+ "%s len %d data %d channel %d\n", __func__,
+ skb->len, skb->data_len, channel->channel);
+ if (!efx->n_channels || !efx->n_tx_channels || !channel) {
+ netif_stop_queue(net_dev);
+ dev_kfree_skb_any(skb);
+ goto err;
+ }
+
+ tx_queue = &channel->tx_queue[0];
+ rc = __ef100_enqueue_skb(tx_queue, skb, efv);
+ if (rc == 0)
+ return NETDEV_TX_OK;
+
+err:
+ net_dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+}
+
+static const struct net_device_ops ef100_netdev_ops = {
+ .ndo_open = ef100_net_open,
+ .ndo_stop = ef100_net_stop,
+ .ndo_start_xmit = ef100_hard_start_xmit,
+ .ndo_tx_timeout = efx_watchdog,
+ .ndo_get_stats64 = efx_net_stats,
+ .ndo_change_mtu = efx_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = efx_set_mac_address,
+ .ndo_set_rx_mode = efx_set_rx_mode, /* Lookout */
+ .ndo_set_features = efx_set_features,
+ .ndo_get_phys_port_id = efx_get_phys_port_id,
+ .ndo_get_phys_port_name = efx_get_phys_port_name,
+#ifdef CONFIG_RFS_ACCEL
+ .ndo_rx_flow_steer = efx_filter_rfs,
+#endif
+#ifdef CONFIG_SFC_SRIOV
+ .ndo_setup_tc = efx_tc_setup,
+#endif
+};
+
+/* Netdev registration
+ */
+int ef100_netdev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier);
+ struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
+
+ if (efx->net_dev == net_dev &&
+ (event == NETDEV_CHANGENAME || event == NETDEV_REGISTER))
+ ef100_update_name(efx);
+
+ return NOTIFY_DONE;
+}
+
+static int ef100_register_netdev(struct efx_nic *efx)
+{
+ struct net_device *net_dev = efx->net_dev;
+ int rc;
+
+ net_dev->watchdog_timeo = 5 * HZ;
+ net_dev->irq = efx->pci_dev->irq;
+ net_dev->netdev_ops = &ef100_netdev_ops;
+ net_dev->min_mtu = EFX_MIN_MTU;
+ net_dev->max_mtu = EFX_MAX_MTU;
+ net_dev->ethtool_ops = &ef100_ethtool_ops;
+
+ rtnl_lock();
+
+ rc = dev_alloc_name(net_dev, net_dev->name);
+ if (rc < 0)
+ goto fail_locked;
+ ef100_update_name(efx);
+
+ rc = register_netdevice(net_dev);
+ if (rc)
+ goto fail_locked;
+
+ /* Always start with carrier off; PHY events will detect the link */
+ netif_carrier_off(net_dev);
+
+ efx->state = STATE_NET_DOWN;
+ rtnl_unlock();
+ efx_init_mcdi_logging(efx);
+
+ return 0;
+
+fail_locked:
+ rtnl_unlock();
+ netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
+ return rc;
+}
+
+static void ef100_unregister_netdev(struct efx_nic *efx)
+{
+ if (efx_dev_registered(efx)) {
+ efx_fini_mcdi_logging(efx);
+ efx->state = STATE_PROBED;
+ unregister_netdev(efx->net_dev);
+ }
+}
+
+void ef100_remove_netdev(struct efx_probe_data *probe_data)
+{
+ struct efx_nic *efx = &probe_data->efx;
+
+ if (!efx->net_dev)
+ return;
+
+ rtnl_lock();
+ dev_close(efx->net_dev);
+ rtnl_unlock();
+
+ unregister_netdevice_notifier(&efx->netdev_notifier);
+#if defined(CONFIG_SFC_SRIOV)
+ if (!efx->type->is_vf)
+ efx_ef100_pci_sriov_disable(efx, true);
+#endif
+
+ ef100_unregister_netdev(efx);
+
+#ifdef CONFIG_SFC_SRIOV
+ efx_fini_tc(efx);
+#endif
+
+ down_write(&efx->filter_sem);
+ efx_mcdi_filter_table_remove(efx);
+ up_write(&efx->filter_sem);
+ efx_fini_channels(efx);
+ kfree(efx->phy_data);
+ efx->phy_data = NULL;
+
+ free_netdev(efx->net_dev);
+ efx->net_dev = NULL;
+ efx->state = STATE_PROBED;
+}
+
+int ef100_probe_netdev(struct efx_probe_data *probe_data)
+{
+ struct efx_nic *efx = &probe_data->efx;
+ struct efx_probe_data **probe_ptr;
+ struct net_device *net_dev;
+ int rc;
+
+ if (efx->mcdi->fn_flags &
+ (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
+ pci_info(efx->pci_dev, "No network port on this PCI function");
+ return 0;
+ }
+
+ /* Allocate and initialise a struct net_device */
+ net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
+ if (!net_dev)
+ return -ENOMEM;
+ probe_ptr = netdev_priv(net_dev);
+ *probe_ptr = probe_data;
+ efx->net_dev = net_dev;
+ SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
+
+ /* enable all supported features except rx-fcs and rx-all */
+ net_dev->features |= efx->type->offload_features &
+ ~(NETIF_F_RXFCS | NETIF_F_RXALL);
+ net_dev->hw_features |= efx->type->offload_features;
+ net_dev->hw_enc_features |= efx->type->offload_features;
+ net_dev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_SG |
+ NETIF_F_HIGHDMA | NETIF_F_ALL_TSO;
+ netif_set_tso_max_segs(net_dev,
+ ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS_DEFAULT);
+ efx->mdio.dev = net_dev;
+
+ rc = efx_ef100_init_datapath_caps(efx);
+ if (rc < 0)
+ goto fail;
+
+ rc = ef100_phy_probe(efx);
+ if (rc)
+ goto fail;
+
+ rc = efx_init_channels(efx);
+ if (rc)
+ goto fail;
+
+ down_write(&efx->filter_sem);
+ rc = ef100_filter_table_probe(efx);
+ up_write(&efx->filter_sem);
+ if (rc)
+ goto fail;
+
+ netdev_rss_key_fill(efx->rss_context.rx_hash_key,
+ sizeof(efx->rss_context.rx_hash_key));
+
+ /* Don't fail init if RSS setup doesn't work. */
+ efx_mcdi_push_default_indir_table(efx, efx->n_rx_channels);
+
+ rc = ef100_register_netdev(efx);
+ if (rc)
+ goto fail;
+
+ if (!efx->type->is_vf) {
+ rc = ef100_probe_netdev_pf(efx);
+ if (rc)
+ goto fail;
+ }
+
+ efx->netdev_notifier.notifier_call = ef100_netdev_event;
+ rc = register_netdevice_notifier(&efx->netdev_notifier);
+ if (rc) {
+ netif_err(efx, probe, efx->net_dev,
+ "Failed to register netdevice notifier, rc=%d\n", rc);
+ goto fail;
+ }
+
+fail:
+ return rc;
+}