sfc_ef100: implement ndo_open/close and EVQ probing
Channels are probed, but actual event handling is still stubbed out.
Stub implementation of check_caps is needed because ptp.c will call into
it from efx_ptp_use_mac_tx_timestamps() to decide if it wants TXQs.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c
index f900b37..d1753ed 100644
--- a/drivers/net/ethernet/sfc/ef100_netdev.c
+++ b/drivers/net/ethernet/sfc/ef100_netdev.c
@@ -29,6 +29,147 @@ 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 = netdev_priv(net_dev);
+
+ netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
+ raw_smp_processor_id());
+
+ netif_stop_queue(net_dev);
+ efx_stop_all(efx);
+ efx_disable_interrupts(efx);
+ efx_clear_interrupt_affinity(efx);
+ efx_nic_fini_interrupt(efx);
+ efx_fini_napi(efx);
+ efx_remove_channels(efx);
+ efx_mcdi_free_vis(efx);
+ efx_remove_interrupts(efx);
+
+ return 0;
+}
+
+/* Context: process, rtnl_lock() held. */
+static int ef100_net_open(struct net_device *net_dev)
+{
+ struct efx_nic *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_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);
+
+ 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);
+
+ 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).
*
@@ -64,6 +205,8 @@ static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
}
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,
};
