On Tue, Mar 15, 2016 at 12:50:06PM +0200, Netanel Belgazal wrote:
[...]
> diff --git a/drivers/net/ethernet/amazon/Kconfig
> b/drivers/net/ethernet/amazon/Kconfig
> new file mode 100644
> index 0000000..bc4f240d
> --- /dev/null
> +++ b/drivers/net/ethernet/amazon/Kconfig
> @@ -0,0 +1,27 @@
> +#
> +# Amazon network device configuration
> +#
> +
> +config NET_VENDOR_AMAZON
> + bool "Amazon Devices"
> + default y
> + ---help---
> + If you have a network (Ethernet) device belonging to this class, say
> Y.
> +
> + Note that the answer to this question doesn't directly affect the
> + kernel: saying N will just cause the configurator to skip all
> + the questions about amazon devices. If you say Y, you will be asked
> + for your specific device in the following questions.
> +
> +if NET_VENDOR_AMAZON
> +
> +config ENA_ETHERNET
> + tristate "Elastic Network Adapter (ENA) support"
> + depends on (PCI_MSI && X86) || COMPILE_TEST
Remove COMPILE_TEST so that the kbuild-all robot won't complain. I
imagine that the drier should work on other systems that have MSI-X...
> + ---help---
> + This driver supports Elastic Network Adapter (ENA) adapter"
> +
> + To compile this driver as a module, choose M here.
> + The module will be called ena.
> +
> +endif #NET_VENDOR_AMAZON
[...]
> diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> new file mode 100644
> index 0000000..41d7265
> --- /dev/null
> +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
[...]
> +static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
> +{
> + u32 i;
> + int rc;
> +
> + adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_queues);
> + if (!adapter->netdev->rx_cpu_rmap)
> + return -ENOMEM;
> + for (i = 0; i < adapter->num_queues; i++) {
> + int irq_idx = ENA_IO_IRQ_IDX(i);
> +
> + rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
> + adapter->msix_entries[irq_idx].vector);
> + if (rc) {
> + free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
> + adapter->netdev->rx_cpu_rmap = NULL;
> + return rc;
> + }
> + }
> + return 0;
> +}
This should be in #ifdef CONFIG_RSS_ACCEL (and elsewhere where
netdev->rx_cpu_rmap is touched).
--msw
