path: root/drivers/net/ethernet/marvell/octeon_ep_vf/octep_vf_main.c

// SPDX-License-Identifier: GPL-2.0
/* Marvell Octeon EP (EndPoint) VF Ethernet Driver
 *
 * Copyright (C) 2020 Marvell.
 *
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/aer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/vmalloc.h>
#include <net/netdev_queues.h>

#include "octep_vf_config.h"
#include "octep_vf_main.h"

struct workqueue_struct *octep_vf_wq;

/* Supported Devices */
static const struct pci_device_id octep_vf_pci_id_tbl[] = {
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN93_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF95N_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN98_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KA_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KA_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CNF10KB_VF)},
	{PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, OCTEP_PCI_DEVICE_ID_CN10KB_VF)},
	{0, },
};
MODULE_DEVICE_TABLE(pci, octep_vf_pci_id_tbl);

MODULE_AUTHOR("Veerasenareddy Burru <vburru@marvell.com>");
MODULE_DESCRIPTION(OCTEP_VF_DRV_STRING);
MODULE_LICENSE("GPL");

/**
 * octep_vf_alloc_ioq_vectors() - Allocate Tx/Rx Queue interrupt info.
 *
 * @oct: Octeon device private data structure.
 *
 * Allocate resources to hold per Tx/Rx queue interrupt info.
 * This is the information passed to interrupt handler, from which napi poll
 * is scheduled and includes quick access to private data of Tx/Rx queue
 * corresponding to the interrupt being handled.
 *
 * Return: 0, on successful allocation of resources for all queue interrupts.
 *         -1, if failed to allocate any resource.
 */
static int octep_vf_alloc_ioq_vectors(struct octep_vf_device *oct)
{
	struct octep_vf_ioq_vector *ioq_vector;
	int i;

	for (i = 0; i < oct->num_oqs; i++) {
		oct->ioq_vector[i] = vzalloc(sizeof(*oct->ioq_vector[i]));
		if (!oct->ioq_vector[i])
			goto free_ioq_vector;

		ioq_vector = oct->ioq_vector[i];
		ioq_vector->iq = oct->iq[i];
		ioq_vector->oq = oct->oq[i];
		ioq_vector->octep_vf_dev = oct;
	}

	dev_info(&oct->pdev->dev, "Allocated %d IOQ vectors\n", oct->num_oqs);
	return 0;

free_ioq_vector:
	while (i) {
		i--;
		vfree(oct->ioq_vector[i]);
		oct->ioq_vector[i] = NULL;
	}
	return -1;
}

/**
 * octep_vf_free_ioq_vectors() - Free Tx/Rx Queue interrupt vector info.
 *
 * @oct: Octeon device private data structure.
 */
static void octep_vf_free_ioq_vectors(struct octep_vf_device *oct)
{
	int i;

	for (i = 0; i < oct->num_oqs; i++) {
		if (oct->ioq_vector[i]) {
			vfree(oct->ioq_vector[i]);
			oct->ioq_vector[i] = NULL;
		}
	}
	netdev_info(oct->netdev, "Freed IOQ Vectors\n");
}

/**
 * octep_vf_enable_msix_range() - enable MSI-x interrupts.
 *
 * @oct: Octeon device private data structure.
 *
 * Allocate and enable all MSI-x interrupts (queue and non-queue interrupts)
 * for the Octeon device.
 *
 * Return: 0, on successfully enabling all MSI-x interrupts.
 *         -1, if failed to enable any MSI-x interrupt.
 */
static int octep_vf_enable_msix_range(struct octep_vf_device *oct)
{
	int num_msix, msix_allocated;
	int i;

	/* Generic interrupts apart from input/output queues */
	//num_msix = oct->num_oqs + CFG_GET_NON_IOQ_MSIX(oct->conf);
	num_msix = oct->num_oqs;
	oct->msix_entries = kcalloc(num_msix, sizeof(struct msix_entry), GFP_KERNEL);
	if (!oct->msix_entries)
		goto msix_alloc_err;

	for (i = 0; i < num_msix; i++)
		oct->