696 lines
16 KiB
C
696 lines
16 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 - Virtual Open Systems
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* Author: Antonios Motakis <a.motakis@virtualopensystems.com>
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*/
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#define dev_fmt(fmt) "VFIO: " fmt
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#include <linux/device.h>
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#include <linux/acpi.h>
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#include <linux/iommu.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include <linux/vfio.h>
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#include "vfio_platform_private.h"
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#define DRIVER_VERSION "0.10"
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#define DRIVER_AUTHOR "Antonios Motakis <a.motakis@virtualopensystems.com>"
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#define DRIVER_DESC "VFIO platform base module"
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#define VFIO_PLATFORM_IS_ACPI(vdev) ((vdev)->acpihid != NULL)
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static LIST_HEAD(reset_list);
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static DEFINE_MUTEX(driver_lock);
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static vfio_platform_reset_fn_t vfio_platform_lookup_reset(const char *compat,
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struct module **module)
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{
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struct vfio_platform_reset_node *iter;
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vfio_platform_reset_fn_t reset_fn = NULL;
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mutex_lock(&driver_lock);
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list_for_each_entry(iter, &reset_list, link) {
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if (!strcmp(iter->compat, compat) &&
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try_module_get(iter->owner)) {
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*module = iter->owner;
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reset_fn = iter->of_reset;
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break;
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}
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}
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mutex_unlock(&driver_lock);
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return reset_fn;
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}
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static int vfio_platform_acpi_probe(struct vfio_platform_device *vdev,
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struct device *dev)
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{
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struct acpi_device *adev;
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if (acpi_disabled)
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return -ENOENT;
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adev = ACPI_COMPANION(dev);
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if (!adev) {
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dev_err(dev, "ACPI companion device not found for %s\n",
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vdev->name);
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return -ENODEV;
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}
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#ifdef CONFIG_ACPI
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vdev->acpihid = acpi_device_hid(adev);
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#endif
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return WARN_ON(!vdev->acpihid) ? -EINVAL : 0;
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}
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static int vfio_platform_acpi_call_reset(struct vfio_platform_device *vdev,
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const char **extra_dbg)
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{
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#ifdef CONFIG_ACPI
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struct device *dev = vdev->device;
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acpi_handle handle = ACPI_HANDLE(dev);
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acpi_status acpi_ret;
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acpi_ret = acpi_evaluate_object(handle, "_RST", NULL, NULL);
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if (ACPI_FAILURE(acpi_ret)) {
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if (extra_dbg)
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*extra_dbg = acpi_format_exception(acpi_ret);
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return -EINVAL;
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}
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return 0;
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#else
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return -ENOENT;
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#endif
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}
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static bool vfio_platform_acpi_has_reset(struct vfio_platform_device *vdev)
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{
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#ifdef CONFIG_ACPI
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struct device *dev = vdev->device;
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acpi_handle handle = ACPI_HANDLE(dev);
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return acpi_has_method(handle, "_RST");
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#else
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return false;
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#endif
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}
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static bool vfio_platform_has_reset(struct vfio_platform_device *vdev)
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{
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if (VFIO_PLATFORM_IS_ACPI(vdev))
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return vfio_platform_acpi_has_reset(vdev);
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return vdev->of_reset ? true : false;
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}
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static int vfio_platform_get_reset(struct vfio_platform_device *vdev)
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{
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if (VFIO_PLATFORM_IS_ACPI(vdev))
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return vfio_platform_acpi_has_reset(vdev) ? 0 : -ENOENT;
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vdev->of_reset = vfio_platform_lookup_reset(vdev->compat,
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&vdev->reset_module);
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if (!vdev->of_reset) {
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request_module("vfio-reset:%s", vdev->compat);
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vdev->of_reset = vfio_platform_lookup_reset(vdev->compat,
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&vdev->reset_module);
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}
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return vdev->of_reset ? 0 : -ENOENT;
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}
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static void vfio_platform_put_reset(struct vfio_platform_device *vdev)
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{
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if (VFIO_PLATFORM_IS_ACPI(vdev))
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return;
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if (vdev->of_reset)
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module_put(vdev->reset_module);
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}
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static int vfio_platform_regions_init(struct vfio_platform_device *vdev)
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{
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int cnt = 0, i;
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while (vdev->get_resource(vdev, cnt))
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cnt++;
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vdev->regions = kcalloc(cnt, sizeof(struct vfio_platform_region),
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GFP_KERNEL_ACCOUNT);
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if (!vdev->regions)
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return -ENOMEM;
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for (i = 0; i < cnt; i++) {
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struct resource *res =
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vdev->get_resource(vdev, i);
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vdev->regions[i].addr = res->start;
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vdev->regions[i].size = resource_size(res);
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vdev->regions[i].flags = 0;
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switch (resource_type(res)) {
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case IORESOURCE_MEM:
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vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_MMIO;
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vdev->regions[i].flags |= VFIO_REGION_INFO_FLAG_READ;
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if (!(res->flags & IORESOURCE_READONLY))
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vdev->regions[i].flags |=
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VFIO_REGION_INFO_FLAG_WRITE;
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/*
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* Only regions addressed with PAGE granularity may be
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* MMAPed securely.
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*/
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if (!(vdev->regions[i].addr & ~PAGE_MASK) &&
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!(vdev->regions[i].size & ~PAGE_MASK))
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vdev->regions[i].flags |=
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VFIO_REGION_INFO_FLAG_MMAP;
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break;
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case IORESOURCE_IO:
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vdev->regions[i].type = VFIO_PLATFORM_REGION_TYPE_PIO;
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break;
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default:
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goto err;
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}
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}
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vdev->num_regions = cnt;
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return 0;
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err:
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kfree(vdev->regions);
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return -EINVAL;
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}
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static void vfio_platform_regions_cleanup(struct vfio_platform_device *vdev)
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{
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int i;
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for (i = 0; i < vdev->num_regions; i++)
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iounmap(vdev->regions[i].ioaddr);
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vdev->num_regions = 0;
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kfree(vdev->regions);
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}
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static int vfio_platform_call_reset(struct vfio_platform_device *vdev,
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const char **extra_dbg)
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{
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if (VFIO_PLATFORM_IS_ACPI(vdev)) {
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dev_info(vdev->device, "reset\n");
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return vfio_platform_acpi_call_reset(vdev, extra_dbg);
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} else if (vdev->of_reset) {
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dev_info(vdev->device, "reset\n");
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return vdev->of_reset(vdev);
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}
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dev_warn(vdev->device, "no reset function found!\n");
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return -EINVAL;
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}
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void vfio_platform_close_device(struct vfio_device *core_vdev)
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{
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struct vfio_platform_device *vdev =
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container_of(core_vdev, struct vfio_platform_device, vdev);
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const char *extra_dbg = NULL;
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int ret;
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ret = vfio_platform_call_reset(vdev, &extra_dbg);
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if (WARN_ON(ret && vdev->reset_required)) {
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dev_warn(
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vdev->device,
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"reset driver is required and reset call failed in release (%d) %s\n",
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ret, extra_dbg ? extra_dbg : "");
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}
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pm_runtime_put(vdev->device);
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vfio_platform_regions_cleanup(vdev);
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vfio_platform_irq_cleanup(vdev);
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}
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EXPORT_SYMBOL_GPL(vfio_platform_close_device);
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int vfio_platform_open_device(struct vfio_device *core_vdev)
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{
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struct vfio_platform_device *vdev =
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container_of(core_vdev, struct vfio_platform_device, vdev);
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const char *extra_dbg = NULL;
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int ret;
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ret = vfio_platform_regions_init(vdev);
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if (ret)
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return ret;
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ret = vfio_platform_irq_init(vdev);
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if (ret)
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goto err_irq;
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ret = pm_runtime_get_sync(vdev->device);
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if (ret < 0)
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goto err_rst;
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ret = vfio_platform_call_reset(vdev, &extra_dbg);
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if (ret && vdev->reset_required) {
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dev_warn(
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vdev->device,
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"reset driver is required and reset call failed in open (%d) %s\n",
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ret, extra_dbg ? extra_dbg : "");
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goto err_rst;
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}
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return 0;
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err_rst:
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pm_runtime_put(vdev->device);
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vfio_platform_irq_cleanup(vdev);
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err_irq:
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vfio_platform_regions_cleanup(vdev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(vfio_platform_open_device);
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long vfio_platform_ioctl(struct vfio_device *core_vdev,
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unsigned int cmd, unsigned long arg)
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{
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struct vfio_platform_device *vdev =
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container_of(core_vdev, struct vfio_platform_device, vdev);
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unsigned long minsz;
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if (cmd == VFIO_DEVICE_GET_INFO) {
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struct vfio_device_info info;
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minsz = offsetofend(struct vfio_device_info, num_irqs);
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if (copy_from_user(&info, (void __user *)arg, minsz))
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return -EFAULT;
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if (info.argsz < minsz)
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return -EINVAL;
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if (vfio_platform_has_reset(vdev))
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vdev->flags |= VFIO_DEVICE_FLAGS_RESET;
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info.flags = vdev->flags;
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info.num_regions = vdev->num_regions;
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info.num_irqs = vdev->num_irqs;
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return copy_to_user((void __user *)arg, &info, minsz) ?
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-EFAULT : 0;
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} else if (cmd == VFIO_DEVICE_GET_REGION_INFO) {
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struct vfio_region_info info;
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minsz = offsetofend(struct vfio_region_info, offset);
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if (copy_from_user(&info, (void __user *)arg, minsz))
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return -EFAULT;
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if (info.argsz < minsz)
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return -EINVAL;
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if (info.index >= vdev->num_regions)
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return -EINVAL;
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/* map offset to the physical address */
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info.offset = VFIO_PLATFORM_INDEX_TO_OFFSET(info.index);
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info.size = vdev->regions[info.index].size;
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info.flags = vdev->regions[info.index].flags;
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return copy_to_user((void __user *)arg, &info, minsz) ?
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-EFAULT : 0;
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} else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) {
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struct vfio_irq_info info;
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minsz = offsetofend(struct vfio_irq_info, count);
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if (copy_from_user(&info, (void __user *)arg, minsz))
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return -EFAULT;
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if (info.argsz < minsz)
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return -EINVAL;
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if (info.index >= vdev->num_irqs)
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return -EINVAL;
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info.flags = vdev->irqs[info.index].flags;
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info.count = vdev->irqs[info.index].count;
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return copy_to_user((void __user *)arg, &info, minsz) ?
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-EFAULT : 0;
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} else if (cmd == VFIO_DEVICE_SET_IRQS) {
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struct vfio_irq_set hdr;
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u8 *data = NULL;
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int ret = 0;
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size_t data_size = 0;
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minsz = offsetofend(struct vfio_irq_set, count);
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if (copy_from_user(&hdr, (void __user *)arg, minsz))
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return -EFAULT;
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ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs,
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vdev->num_irqs, &data_size);
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if (ret)
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return ret;
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if (data_size) {
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data = memdup_user((void __user *)(arg + minsz),
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data_size);
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if (IS_ERR(data))
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return PTR_ERR(data);
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}
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mutex_lock(&vdev->igate);
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ret = vfio_platform_set_irqs_ioctl(vdev, hdr.flags, hdr.index,
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hdr.start, hdr.count, data);
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mutex_unlock(&vdev->igate);
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kfree(data);
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return ret;
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||
|
|
} else if (cmd == VFIO_DEVICE_RESET) {
|
||
|
|
return vfio_platform_call_reset(vdev, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
return -ENOTTY;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_ioctl);
|
||
|
|
|
||
|
|
static ssize_t vfio_platform_read_mmio(struct vfio_platform_region *reg,
|
||
|
|
char __user *buf, size_t count,
|
||
|
|
loff_t off)
|
||
|
|
{
|
||
|
|
unsigned int done = 0;
|
||
|
|
|
||
|
|
if (!reg->ioaddr) {
|
||
|
|
reg->ioaddr =
|
||
|
|
ioremap(reg->addr, reg->size);
|
||
|
|
|
||
|
|
if (!reg->ioaddr)
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (count) {
|
||
|
|
size_t filled;
|
||
|
|
|
||
|
|
if (count >= 4 && !(off % 4)) {
|
||
|
|
u32 val;
|
||
|
|
|
||
|
|
val = ioread32(reg->ioaddr + off);
|
||
|
|
if (copy_to_user(buf, &val, 4))
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
filled = 4;
|
||
|
|
} else if (count >= 2 && !(off % 2)) {
|
||
|
|
u16 val;
|
||
|
|
|
||
|
|
val = ioread16(reg->ioaddr + off);
|
||
|
|
if (copy_to_user(buf, &val, 2))
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
filled = 2;
|
||
|
|
} else {
|
||
|
|
u8 val;
|
||
|
|
|
||
|
|
val = ioread8(reg->ioaddr + off);
|
||
|
|
if (copy_to_user(buf, &val, 1))
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
filled = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
count -= filled;
|
||
|
|
done += filled;
|
||
|
|
off += filled;
|
||
|
|
buf += filled;
|
||
|
|
}
|
||
|
|
|
||
|
|
return done;
|
||
|
|
err:
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
ssize_t vfio_platform_read(struct vfio_device *core_vdev,
|
||
|
|
char __user *buf, size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct vfio_platform_device *vdev =
|
||
|
|
container_of(core_vdev, struct vfio_platform_device, vdev);
|
||
|
|
unsigned int index = VFIO_PLATFORM_OFFSET_TO_INDEX(*ppos);
|
||
|
|
loff_t off = *ppos & VFIO_PLATFORM_OFFSET_MASK;
|
||
|
|
|
||
|
|
if (index >= vdev->num_regions)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)
|
||
|
|
return vfio_platform_read_mmio(&vdev->regions[index],
|
||
|
|
buf, count, off);
|
||
|
|
else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)
|
||
|
|
return -EINVAL; /* not implemented */
|
||
|
|
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_read);
|
||
|
|
|
||
|
|
static ssize_t vfio_platform_write_mmio(struct vfio_platform_region *reg,
|
||
|
|
const char __user *buf, size_t count,
|
||
|
|
loff_t off)
|
||
|
|
{
|
||
|
|
unsigned int done = 0;
|
||
|
|
|
||
|
|
if (!reg->ioaddr) {
|
||
|
|
reg->ioaddr =
|
||
|
|
ioremap(reg->addr, reg->size);
|
||
|
|
|
||
|
|
if (!reg->ioaddr)
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (count) {
|
||
|
|
size_t filled;
|
||
|
|
|
||
|
|
if (count >= 4 && !(off % 4)) {
|
||
|
|
u32 val;
|
||
|
|
|
||
|
|
if (copy_from_user(&val, buf, 4))
|
||
|
|
goto err;
|
||
|
|
iowrite32(val, reg->ioaddr + off);
|
||
|
|
|
||
|
|
filled = 4;
|
||
|
|
} else if (count >= 2 && !(off % 2)) {
|
||
|
|
u16 val;
|
||
|
|
|
||
|
|
if (copy_from_user(&val, buf, 2))
|
||
|
|
goto err;
|
||
|
|
iowrite16(val, reg->ioaddr + off);
|
||
|
|
|
||
|
|
filled = 2;
|
||
|
|
} else {
|
||
|
|
u8 val;
|
||
|
|
|
||
|
|
if (copy_from_user(&val, buf, 1))
|
||
|
|
goto err;
|
||
|
|
iowrite8(val, reg->ioaddr + off);
|
||
|
|
|
||
|
|
filled = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
count -= filled;
|
||
|
|
done += filled;
|
||
|
|
off += filled;
|
||
|
|
buf += filled;
|
||
|
|
}
|
||
|
|
|
||
|
|
return done;
|
||
|
|
err:
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
ssize_t vfio_platform_write(struct vfio_device *core_vdev, const char __user *buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct vfio_platform_device *vdev =
|
||
|
|
container_of(core_vdev, struct vfio_platform_device, vdev);
|
||
|
|
unsigned int index = VFIO_PLATFORM_OFFSET_TO_INDEX(*ppos);
|
||
|
|
loff_t off = *ppos & VFIO_PLATFORM_OFFSET_MASK;
|
||
|
|
|
||
|
|
if (index >= vdev->num_regions)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)
|
||
|
|
return vfio_platform_write_mmio(&vdev->regions[index],
|
||
|
|
buf, count, off);
|
||
|
|
else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)
|
||
|
|
return -EINVAL; /* not implemented */
|
||
|
|
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_write);
|
||
|
|
|
||
|
|
static int vfio_platform_mmap_mmio(struct vfio_platform_region region,
|
||
|
|
struct vm_area_struct *vma)
|
||
|
|
{
|
||
|
|
u64 req_len, pgoff, req_start;
|
||
|
|
|
||
|
|
req_len = vma->vm_end - vma->vm_start;
|
||
|
|
pgoff = vma->vm_pgoff &
|
||
|
|
((1U << (VFIO_PLATFORM_OFFSET_SHIFT - PAGE_SHIFT)) - 1);
|
||
|
|
req_start = pgoff << PAGE_SHIFT;
|
||
|
|
|
||
|
|
if (region.size < PAGE_SIZE || req_start + req_len > region.size)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
||
|
|
vma->vm_pgoff = (region.addr >> PAGE_SHIFT) + pgoff;
|
||
|
|
|
||
|
|
return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
|
||
|
|
req_len, vma->vm_page_prot);
|
||
|
|
}
|
||
|
|
|
||
|
|
int vfio_platform_mmap(struct vfio_device *core_vdev, struct vm_area_struct *vma)
|
||
|
|
{
|
||
|
|
struct vfio_platform_device *vdev =
|
||
|
|
container_of(core_vdev, struct vfio_platform_device, vdev);
|
||
|
|
unsigned int index;
|
||
|
|
|
||
|
|
index = vma->vm_pgoff >> (VFIO_PLATFORM_OFFSET_SHIFT - PAGE_SHIFT);
|
||
|
|
|
||
|
|
if (vma->vm_end < vma->vm_start)
|
||
|
|
return -EINVAL;
|
||
|
|
if (!(vma->vm_flags & VM_SHARED))
|
||
|
|
return -EINVAL;
|
||
|
|
if (index >= vdev->num_regions)
|
||
|
|
return -EINVAL;
|
||
|
|
if (vma->vm_start & ~PAGE_MASK)
|
||
|
|
return -EINVAL;
|
||
|
|
if (vma->vm_end & ~PAGE_MASK)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_MMAP))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_READ)
|
||
|
|
&& (vma->vm_flags & VM_READ))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!(vdev->regions[index].flags & VFIO_REGION_INFO_FLAG_WRITE)
|
||
|
|
&& (vma->vm_flags & VM_WRITE))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
vma->vm_private_data = vdev;
|
||
|
|
|
||
|
|
if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)
|
||
|
|
return vfio_platform_mmap_mmio(vdev->regions[index], vma);
|
||
|
|
|
||
|
|
else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)
|
||
|
|
return -EINVAL; /* not implemented */
|
||
|
|
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_mmap);
|
||
|
|
|
||
|
|
static int vfio_platform_of_probe(struct vfio_platform_device *vdev,
|
||
|
|
struct device *dev)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = device_property_read_string(dev, "compatible",
|
||
|
|
&vdev->compat);
|
||
|
|
if (ret)
|
||
|
|
dev_err(dev, "Cannot retrieve compat for %s\n", vdev->name);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* There can be two kernel build combinations. One build where
|
||
|
|
* ACPI is not selected in Kconfig and another one with the ACPI Kconfig.
|
||
|
|
*
|
||
|
|
* In the first case, vfio_platform_acpi_probe will return since
|
||
|
|
* acpi_disabled is 1. DT user will not see any kind of messages from
|
||
|
|
* ACPI.
|
||
|
|
*
|
||
|
|
* In the second case, both DT and ACPI is compiled in but the system is
|
||
|
|
* booting with any of these combinations.
|
||
|
|
*
|
||
|
|
* If the firmware is DT type, then acpi_disabled is 1. The ACPI probe routine
|
||
|
|
* terminates immediately without any messages.
|
||
|
|
*
|
||
|
|
* If the firmware is ACPI type, then acpi_disabled is 0. All other checks are
|
||
|
|
* valid checks. We cannot claim that this system is DT.
|
||
|
|
*/
|
||
|
|
int vfio_platform_init_common(struct vfio_platform_device *vdev)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct device *dev = vdev->vdev.dev;
|
||
|
|
|
||
|
|
ret = vfio_platform_acpi_probe(vdev, dev);
|
||
|
|
if (ret)
|
||
|
|
ret = vfio_platform_of_probe(vdev, dev);
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
vdev->device = dev;
|
||
|
|
mutex_init(&vdev->igate);
|
||
|
|
|
||
|
|
ret = vfio_platform_get_reset(vdev);
|
||
|
|
if (ret && vdev->reset_required) {
|
||
|
|
dev_err(dev, "No reset function found for device %s\n",
|
||
|
|
vdev->name);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_init_common);
|
||
|
|
|
||
|
|
void vfio_platform_release_common(struct vfio_platform_device *vdev)
|
||
|
|
{
|
||
|
|
vfio_platform_put_reset(vdev);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_release_common);
|
||
|
|
|
||
|
|
void __vfio_platform_register_reset(struct vfio_platform_reset_node *node)
|
||
|
|
{
|
||
|
|
mutex_lock(&driver_lock);
|
||
|
|
list_add(&node->link, &reset_list);
|
||
|
|
mutex_unlock(&driver_lock);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(__vfio_platform_register_reset);
|
||
|
|
|
||
|
|
void vfio_platform_unregister_reset(const char *compat,
|
||
|
|
vfio_platform_reset_fn_t fn)
|
||
|
|
{
|
||
|
|
struct vfio_platform_reset_node *iter, *temp;
|
||
|
|
|
||
|
|
mutex_lock(&driver_lock);
|
||
|
|
list_for_each_entry_safe(iter, temp, &reset_list, link) {
|
||
|
|
if (!strcmp(iter->compat, compat) && (iter->of_reset == fn)) {
|
||
|
|
list_del(&iter->link);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
mutex_unlock(&driver_lock);
|
||
|
|
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_platform_unregister_reset);
|
||
|
|
|
||
|
|
MODULE_VERSION(DRIVER_VERSION);
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|