144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* VFIO ZPCI devices support
|
|
*
|
|
* Copyright (C) IBM Corp. 2020. All rights reserved.
|
|
* Author(s): Pierre Morel <pmorel@linux.ibm.com>
|
|
* Matthew Rosato <mjrosato@linux.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/vfio.h>
|
|
#include <linux/vfio_zdev.h>
|
|
#include <asm/pci_clp.h>
|
|
#include <asm/pci_io.h>
|
|
|
|
#include "vfio_pci_private.h"
|
|
|
|
/*
|
|
* Add the Base PCI Function information to the device info region.
|
|
*/
|
|
static int zpci_base_cap(struct zpci_dev *zdev, struct vfio_info_cap *caps)
|
|
{
|
|
struct vfio_device_info_cap_zpci_base cap = {
|
|
.header.id = VFIO_DEVICE_INFO_CAP_ZPCI_BASE,
|
|
.header.version = 1,
|
|
.start_dma = zdev->start_dma,
|
|
.end_dma = zdev->end_dma,
|
|
.pchid = zdev->pchid,
|
|
.vfn = zdev->vfn,
|
|
.fmb_length = zdev->fmb_length,
|
|
.pft = zdev->pft,
|
|
.gid = zdev->pfgid
|
|
};
|
|
|
|
return vfio_info_add_capability(caps, &cap.header, sizeof(cap));
|
|
}
|
|
|
|
/*
|
|
* Add the Base PCI Function Group information to the device info region.
|
|
*/
|
|
static int zpci_group_cap(struct zpci_dev *zdev, struct vfio_info_cap *caps)
|
|
{
|
|
struct vfio_device_info_cap_zpci_group cap = {
|
|
.header.id = VFIO_DEVICE_INFO_CAP_ZPCI_GROUP,
|
|
.header.version = 1,
|
|
.dasm = zdev->dma_mask,
|
|
.msi_addr = zdev->msi_addr,
|
|
.flags = VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH,
|
|
.mui = zdev->fmb_update,
|
|
.noi = zdev->max_msi,
|
|
.maxstbl = ZPCI_MAX_WRITE_SIZE,
|
|
.version = zdev->version
|
|
};
|
|
|
|
return vfio_info_add_capability(caps, &cap.header, sizeof(cap));
|
|
}
|
|
|
|
/*
|
|
* Add the device utility string to the device info region.
|
|
*/
|
|
static int zpci_util_cap(struct zpci_dev *zdev, struct vfio_info_cap *caps)
|
|
{
|
|
struct vfio_device_info_cap_zpci_util *cap;
|
|
int cap_size = sizeof(*cap) + CLP_UTIL_STR_LEN;
|
|
int ret;
|
|
|
|
cap = kmalloc(cap_size, GFP_KERNEL);
|
|
if (!cap)
|
|
return -ENOMEM;
|
|
|
|
cap->header.id = VFIO_DEVICE_INFO_CAP_ZPCI_UTIL;
|
|
cap->header.version = 1;
|
|
cap->size = CLP_UTIL_STR_LEN;
|
|
memcpy(cap->util_str, zdev->util_str, cap->size);
|
|
|
|
ret = vfio_info_add_capability(caps, &cap->header, cap_size);
|
|
|
|
kfree(cap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Add the function path string to the device info region.
|
|
*/
|
|
static int zpci_pfip_cap(struct zpci_dev *zdev, struct vfio_info_cap *caps)
|
|
{
|
|
struct vfio_device_info_cap_zpci_pfip *cap;
|
|
int cap_size = sizeof(*cap) + CLP_PFIP_NR_SEGMENTS;
|
|
int ret;
|
|
|
|
cap = kmalloc(cap_size, GFP_KERNEL);
|
|
if (!cap)
|
|
return -ENOMEM;
|
|
|
|
cap->header.id = VFIO_DEVICE_INFO_CAP_ZPCI_PFIP;
|
|
cap->header.version = 1;
|
|
cap->size = CLP_PFIP_NR_SEGMENTS;
|
|
memcpy(cap->pfip, zdev->pfip, cap->size);
|
|
|
|
ret = vfio_info_add_capability(caps, &cap->header, cap_size);
|
|
|
|
kfree(cap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Add all supported capabilities to the VFIO_DEVICE_GET_INFO capability chain.
|
|
*/
|
|
int vfio_pci_info_zdev_add_caps(struct vfio_pci_device *vdev,
|
|
struct vfio_info_cap *caps)
|
|
{
|
|
struct zpci_dev *zdev = to_zpci(vdev->pdev);
|
|
int ret;
|
|
|
|
if (!zdev)
|
|
return -ENODEV;
|
|
|
|
ret = zpci_base_cap(zdev, caps);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = zpci_group_cap(zdev, caps);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (zdev->util_str_avail) {
|
|
ret = zpci_util_cap(zdev, caps);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = zpci_pfip_cap(zdev, caps);
|
|
|
|
return ret;
|
|
}
|