linux/drivers/gpu/drm/xe/xe_sriov.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2023 Intel Corporation
 */

#include <drm/drm_managed.h>

#include "regs/xe_regs.h"

#include "xe_assert.h"
#include "xe_device.h"
#include "xe_mmio.h"
#include "xe_sriov.h"
#include "xe_sriov_pf.h"

/**
 * xe_sriov_mode_to_string - Convert enum value to string.
 * @mode: the &xe_sriov_mode to convert
 *
 * Returns: SR-IOV mode as a user friendly string.
 */
const char *xe_sriov_mode_to_string(enum xe_sriov_mode mode)
{ … }

static bool test_is_vf(struct xe_device *xe)
{ … }

/**
 * xe_sriov_probe_early - Probe a SR-IOV mode.
 * @xe: the &xe_device to probe mode on
 *
 * This function should be called only once and as soon as possible during
 * driver probe to detect whether we are running a SR-IOV Physical Function
 * (PF) or a Virtual Function (VF) device.
 *
 * SR-IOV PF mode detection is based on PCI @dev_is_pf() function.
 * SR-IOV VF mode detection is based on dedicated MMIO register read.
 */
void xe_sriov_probe_early(struct xe_device *xe)
{ … }

static void fini_sriov(struct drm_device *drm, void *arg)
{ … }

/**
 * xe_sriov_init - Initialize SR-IOV specific data.
 * @xe: the &xe_device to initialize
 *
 * In this function we create dedicated workqueue that will be used
 * by the SR-IOV specific workers.
 *
 * Return: 0 on success or a negative error code on failure.
 */
int xe_sriov_init(struct xe_device *xe)
{ … }

/**
 * xe_sriov_print_info - Print basic SR-IOV information.
 * @xe: the &xe_device to print info from
 * @p: the &drm_printer
 *
 * Print SR-IOV related information into provided DRM printer.
 */
void xe_sriov_print_info(struct xe_device *xe, struct drm_printer *p)
{ … }

/**
 * xe_sriov_function_name() - Get SR-IOV Function name.
 * @n: the Function number (identifier) to get name of
 * @buf: the buffer to format to
 * @size: size of the buffer (shall be at least 5 bytes)
 *
 * Return: formatted function name ("PF" or "VF%u").
 */
const char *xe_sriov_function_name(unsigned int n, char *buf, size_t size)
{ … }