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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2026, Advanced Micro Devices, Inc.
*/
#include <drm/amdxdna_accel.h>
#include <drm/drm_print.h>
#include <linux/pci.h>
#include "aie.h"
#include "aie4_msg_priv.h"
#include "aie4_pci.h"
#include "amdxdna_mailbox.h"
#include "amdxdna_mailbox_helper.h"
#include "amdxdna_pci_drv.h"
static int aie4_destroy_vfs(struct amdxdna_dev_hdl *ndev)
{
DECLARE_AIE_MSG(aie4_msg_destroy_vfs, AIE4_MSG_OP_DESTROY_VFS);
int ret;
ret = aie_send_mgmt_msg_wait(&ndev->aie, &msg);
if (ret)
XDNA_ERR(ndev->aie.xdna, "destroy vfs op failed: %d", ret);
return ret;
}
static int aie4_create_vfs(struct amdxdna_dev_hdl *ndev, int num_vfs)
{
DECLARE_AIE_MSG(aie4_msg_create_vfs, AIE4_MSG_OP_CREATE_VFS);
int ret;
req.vf_cnt = num_vfs;
ret = aie_send_mgmt_msg_wait(&ndev->aie, &msg);
if (ret)
XDNA_ERR(ndev->aie.xdna, "create vfs op failed: %d", ret);
return ret;
}
int aie4_sriov_stop(struct amdxdna_dev_hdl *ndev)
{
struct amdxdna_dev *xdna = ndev->aie.xdna;
struct pci_dev *pdev = to_pci_dev(xdna->ddev.dev);
int ret;
if (!pci_num_vf(pdev))
return 0;
ret = pci_vfs_assigned(pdev);
if (ret) {
XDNA_ERR(xdna, "VFs are still assigned to VMs");
return -EPERM;
}
pci_disable_sriov(pdev);
return aie4_destroy_vfs(ndev);
}
static int aie4_sriov_start(struct amdxdna_dev_hdl *ndev, int num_vfs)
{
struct amdxdna_dev *xdna = ndev->aie.xdna;
struct pci_dev *pdev = to_pci_dev(xdna->ddev.dev);
int ret;
ret = aie4_create_vfs(ndev, num_vfs);
if (ret)
return ret;
ret = pci_enable_sriov(pdev, num_vfs);
if (ret) {
XDNA_ERR(xdna, "configure VFs failed, ret: %d", ret);
aie4_destroy_vfs(ndev);
return ret;
}
return num_vfs;
}
int aie4_sriov_configure(struct amdxdna_dev *xdna, int num_vfs)
{
struct amdxdna_dev_hdl *ndev = xdna->dev_handle;
drm_WARN_ON(&xdna->ddev, !mutex_is_locked(&xdna->dev_lock));
return (num_vfs) ? aie4_sriov_start(ndev, num_vfs) : aie4_sriov_stop(ndev);
}
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