// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/bitmap.h>
#include <linux/pci.h>
#include <asm/opal.h>
#include "pci.h"
/*
* The majority of the complexity in supporting SR-IOV on PowerNV comes from
* the need to put the MMIO space for each VF into a separate PE. Internally
* the PHB maps MMIO addresses to a specific PE using the "Memory BAR Table".
* The MBT historically only applied to the 64bit MMIO window of the PHB
* so it's common to see it referred to as the "M64BT".
*
* An MBT entry stores the mapped range as an <base>,<mask> pair. This forces
* the address range that we want to map to be power-of-two sized and aligned.
* For conventional PCI devices this isn't really an issue since PCI device BARs
* have the same requirement.
*
* For a SR-IOV BAR things are a little more awkward since size and alignment
* are not coupled. The alignment is set based on the per-VF BAR size, but
* the total BAR area is: number-of-vfs * per-vf-size. The number of VFs
* isn't necessarily a power of two, so neither is the total size. To fix that
* we need to finesse (read: hack) the Linux BAR allocator so that it will
* allocate the SR-IOV BARs in a way that lets us map them using the MBT.
*
* The changes to size and alignment that we need to do depend on the "mode"
* of MBT entry that we use. We only support SR-IOV on PHB3 (IODA2) and above,
* so as a baseline we can assume that we have the following BAR modes
* available:
*
* NB: $PE_COUNT is the number of PEs that the PHB supports.
*
* a) A segmented BAR that splits the mapped range into $PE_COUNT equally sized
* segments. The n'th segment is mapped to the n'th PE.
* b) An un-segmented BAR that maps the whole address range to a specific PE.
*
*
* We prefer to use mode a) since it only requires one MBT entry per SR-IOV BAR
* For comparison b) requires one entry per-VF per-BAR, or:
* (num-vfs * num-sriov-bars) in total. To use a) we need the size of each segment
* to equal the size of the per-VF BAR area. So:
*
* new_size = per-vf-size * number-of-PEs
*
* The alignment for the SR-IOV BAR also needs to be changed from per-vf-size
* to "new_size", calculated above. Implementing this is a convoluted process
* which requires several hooks in the PCI core:
*
* 1. In pcibios_device_add() we call pnv_pci_ioda_fixup_iov().
*
* At this point the device has been probed and the device's BARs are sized,
* but no resource allocations have been done. The SR-IOV BARs are sized
* based on the maximum number of VFs supported by the device and we need
* to increase that to new_size.
*
* 2. Later, when Linux actually assigns resources it tries to make the resource
* allocations for each PCI bus as compact as possible. As a part of that it
* sorts the BARs on a bus by their required alignment, which is calculated
* using pci_resource_alignment().
*
* For IOV resources this goes:
* pci_resource_alignment()
* pci_sriov_resource_alignment()
* pcibios_sriov_resource_alignment()
* pnv_pci_iov_resource_alignment()
*
* Our hook overrides the default alignment, equal to the per-vf-size, with
* new_size computed above.
*
* 3. When userspace enables VFs for a device:
*
* sriov_enable()
* pcibios_sriov_enable()
* pnv_pcibios_sriov_enable()
*
* This is where we actually allocate PE numbers for each VF and setup the
* MBT mapping for each SR-IOV BAR. In steps 1) and 2) we setup an "arena"
* where each MBT segment is equal in size to the VF BAR so we can shift
* around the actual SR-IOV BAR location within this arena. We need this
* ability because the PE space is shared by all devices on the same PHB.
* When using mode a) described above segment 0 in maps to PE#0 which might
* be already being used by another device on the PHB.
*
* As a result we need allocate a contigious range of PE numbers, then shift
* the address programmed into the SR-IOV BAR of the PF so that the address
* of VF0 matches up with the segment corresponding to the first allocated
* PE number. This is handled in pnv_pci_vf_resource_shift().
*
* Once all that is done we return to the PCI core which then enables VFs,
* scans them and creates pci_devs for each. The init process for a VF is
* largely the same as a normal device, but the VF is inserted into the IODA
* PE that we allocated for it rather than the PE associated with the bus.
*
* 4. When userspace disables VFs we unwind the above in
* pnv_pcibios_sriov_disable(). Fortunately this is relatively simple since
* we don't need to validate anything, just tear down the mappings and
* move SR-IOV resource back to its "proper" location.
*
* That's how mode a) works. In theory mode b) (single PE mapping) is less work
* since we can map each individual VF with a separate BAR. However, there's a
* few limitations:
*
* 1) For IODA2 mode b) has a minimum alignment requirement of 32MB. This makes
* it only usable for devices with very large per-VF BARs. Such devices are
* similar to Big Foot. They definitely exist, but I've never seen one.
*
* 2) The number of MBT entries that we have is limited. PHB3 and PHB4 only
* 16 total and some are needed for. Most SR-IOV capable network cards can support
* more than 16 VFs on each port.
*
* We use b) when using a) would use more than 1/4 of the entire 64 bit MMIO
* window of the PHB.
*
*
*
* PHB4 (IODA3) added a few new features that would be useful for SR-IOV. It
* allowed the MBT to map 32bit MMIO space in addition to 64bit which allows
* us to support SR-IOV BARs in the 32bit MMIO window. This is useful since
* the Linux BAR allocation will place any BAR marked as non-prefetchable into
* the non-prefetchable bridge window, which is 32bit only. It also added two
* new modes:
*
* c) A segmented BAR similar to a), but each segment can be individually
* mapped to any PE. This is matches how the 32bit MMIO window worked on
* IODA1&2.
*
* d) A segmented BAR with 8, 64, or 128 segments. This works similarly to a),
* but with fewer segments and configurable base PE.
*
* i.e. The n'th segment maps to the (n + base)'th PE.
*
* The base PE is also required to be a multiple of the window size.
*
* Unfortunately, the OPAL API doesn't currently (as of skiboot v6.6) allow us
* to exploit any of the IODA3 features.
*/
static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
{
struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
struct resource *res;
int i;
resource_size_t vf_bar_sz;
struct pnv_iov_data *iov;
int mul;
iov = kzalloc(sizeof(*iov), GFP_KERNEL);
if (!iov)
goto disable_iov;
pdev->dev.archdata.iov_data = iov;
mul = phb->ioda.total_pe_num;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &pdev->resource[i + PCI_IOV_RESOURCES];
if (!res->flags || res->parent)
continue;
if (!pnv_pci_is_m64_flags(res->flags)) {
dev_warn(&pdev->dev, "Don't support SR-IOV with non M64 VF BAR%d: %pR. \n",
i, res);
goto disable_iov;
}
vf_bar_sz = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES);
/*
* Generally, one segmented M64 BAR maps one IOV BAR. However,
* if a VF BAR is too large we end up wasting a lot of space.
* If each VF needs more than 1/4 of the default m64 segment
* then each VF BAR should be mapped in single-PE mode to reduce
* the amount of space required. This does however limit the
* number of VFs we can support.
*
* The 1/4 limit is arbitrary and can be tweaked.
*/
if (vf_bar_sz > (phb->ioda.m64_segsize >> 2)) {
/*
* On PHB3, the minimum size alignment of M64 BAR in
* single mode is 32MB. If this VF BAR is smaller than
* 32MB, but still too large for a segmented window
* then we can't map it and need to disable SR-IOV for
* this device.
*/
if (vf_bar_sz < SZ_32M) {
pci_err(pdev, "VF BAR%d: %pR can't be mapped in single PE mode\n",
i, res);
goto disable_iov;
}
iov->m64_single_mode[i] = true;
continue;
}
/*
* This BAR can be mapped with one segmented window, so adjust
* te resource size to accommodate.
*/
pci_dbg(pdev, " Fixing VF BAR%d: %pR to\n", i, res);
res->end = res->start + vf_bar_sz * mul - 1;
pci_dbg(pdev, " %pR\n", res);
pci_info(pdev, "VF BAR%d: %pR (expanded to %d VFs for PE alignment)",
i, res, mul);
iov->need_shift = true;
}
return;
disable_iov:
/* Save ourselves some MMIO space by disabling the unusable BARs */
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &pdev->resource[i + PCI_IOV_RESOURCES];
res->flags = 0;
res->end = res->start - 1;
}
pdev->dev.archdata.iov_data = NULL;
kfree(iov);
}
void pnv_pci_ioda_fixup_iov(struct pci_dev *pdev)
{
if (pdev->is_virtfn) {
struct pnv_ioda_pe *pe = pnv_ioda_get_pe(pdev);
/*
* VF PEs are single-device PEs so their pdev pointer needs to
* be set. The pdev doesn't exist when the PE is allocated (in
* (pcibios_sriov_enable()) so we fix it up here.
*/
pe->pdev = pdev;
WARN_ON(!(pe->flags & PNV_IODA_PE_VF));
} else if (pdev->is_physfn) {
/*
* For PFs adjust their allocated IOV resources to match what
* the PHB can support using it's M64 BAR table.
*/
pnv_pci_ioda_fixup_iov_resources(pdev);
}
}
resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev,
int resno)
{
resource_size_t align = pci_iov_resource_size(pdev, resno);
struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
struct pnv_iov_data *iov = pnv_iov_get(pdev);
/*
* iov can be null if we have an SR-IOV device with IOV BAR that can't
* be placed in the m64 space (i.e. The BAR is 32bit or non-prefetch).
* In that case we don't allow VFs to be enabled since one of their
* BARs would not be placed in the correct PE.
*/
if (!iov)
return align;
/*
* If we're using single mode then we can just use the native VF BAR
* alignment. We validated that it's possible to use a single PE
* window above when we did the fixup.
*/
if (iov->m64_single_mode[resno - PCI_IOV_RESOURCES])
return align;
/*
* On PowerNV platform, IOV BAR is mapped by M64 BAR to enable the
* SR-IOV. While from hardware perspective, the range mapped by M64
* BAR should be size aligned.
*
* This function returns the total IOV BAR size if M64 BAR is in
* Shared PE mode or just VF BAR size if not.
* If the M64 BAR is in Single PE mode, return the VF BAR size or
* M64 segment size if IOV BAR size is less.
*/
return phb->ioda.total_pe_num * align;
}
static int pnv_pci_vf_release_m64(struct pci_dev *pdev, u16 num_vfs)
{
struct pnv_iov_data *iov;
struct pnv_phb *phb;
int window_id;
phb = pci_bus_to_pnvhb(pdev->bus);
iov = pnv_iov_get(pdev);
for_each_set_bit(window_id, iov->used_m64_bar_mask, MAX_M64_BARS) {
opal_pci_phb_mmio_enable(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
window_id,
0);
clear_bit(window_id, &phb->ioda.m64_bar_alloc);
}
return 0;
}
/*
* PHB3 and beyond support segmented windows. The window's address range
* is subdivided into phb->ioda.total_pe_num segments and there's a 1-1
* mapping between PEs and segments.
*/
static int64_t pnv_ioda_map_m64_segmented(struct pnv_phb *phb,
int window_id,
resource_size_t start,
resource_size_t size)
{
int64_t rc;
rc = opal_pci_set_phb_mem_window(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
window_id,
start,
0, /* unused */
size);
if (rc)
goto out;
rc = opal_pci_phb_mmio_enable(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
window_id,
OPAL_ENABLE_M64_SPLIT);
out:
if (rc)
pr_err("Failed to map M64 window #%d: %lld\n", window_id, rc);
return rc;
}
static int64_t pnv_ioda_map_m64_single(struct pnv_phb *phb,
int pe_num,
int window_id,
resource_size_t start,
resource_size_t size)
{
int64_t rc;
/*
* The API for setting up m64 mmio windows seems to have been designed
* with P7-IOC in mind. For that chip each M64 BAR (window) had a fixed
* split of 8 equally sized segments each of which could individually
* assigned to a PE.
*
* The problem with this is that the API doesn't have any way to
* communicate the number of segments we want on a BAR. This wasn't
* a problem for p7-ioc since you didn't have a choice, but the
* single PE windows added in PHB3 don't map cleanly to this API.
*
* As a result we've got this slightly awkward process where we
* call opal_pci_map_pe_mmio_window() to put the single in single
* PE mode, and set the PE for the window before setting the address
* bounds. We need to do it this way because the single PE windows
* for PHB3 have different alignment requirements on PHB3.
*/
rc = opal_pci_map_pe_mmio_window(phb->opal_id,
pe_num,
OPAL_M64_WINDOW_TYPE,
window_id,
0);
if (rc)
goto out;
/*
* NB: In single PE mode the window needs to be aligned to 32MB
*/
rc = opal_pci_set_phb_mem_window(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
window_id,
start,
0, /* ignored by FW, m64 is 1-1 */
size);
if (rc)
goto out;
/*
* Now actually enable it. We specified the BAR should be in "non-split"
* mode so FW will validate that the BAR is in single PE mode.
*/
rc = opal_pci_phb_mmio_enable(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
window_id,
OPAL_ENABLE_M64_NON_SPLIT);
out:
if (rc)
pr_err("Error mapping single PE BAR\n");
return rc;
}
static int pnv_pci_alloc_m64_bar(struct pnv_phb *phb, struct pnv_iov_data *iov)
{
int win;
do {
win = find_next_zero_bit(&phb->ioda.m64_bar_alloc,
phb->ioda.m64_bar_idx + 1, 0);
if (win >= phb->ioda.m64_bar_idx + 1)
return -1;
} while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc));
set_bit(win, iov->used_m64_bar_mask);
return win;
}
static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs)
{
struct pnv_iov_data *iov;
struct pnv_phb *phb;
int win;
struct resource *res;
int i, j;
int64_t rc;
resource_size_t size, start;
int base_pe_num;
phb = pci_bus_to_pnvhb(pdev->bus);
iov = pnv_iov_get(pdev);
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &pdev->resource[i + PCI_IOV_RESOURCES];
if (!res->flags || !res->parent)
continue;
/* don't need single mode? map everything in one go! */
if (!iov->m64_single_mode[i]) {
win = pnv_pci_alloc_m64_bar(phb, iov);
if (win < 0)
goto m64_failed;
size = resource_size(res);
start = res->start;
rc = pnv_ioda_map_m64_segmented(phb, win, start, size);
if (rc)
goto m64_failed;
continue;
}
/* otherwise map each VF with single PE BARs */
size = pci_iov_resource_size(pdev, PCI_IOV_RESOURCES + i);
base_pe_num = iov->vf_pe_arr[0].pe_number;
for (j = 0; j < num_vfs; j++) {
win = pnv_pci_alloc_m64_bar(phb, iov);
if (win < 0)
goto m64_failed;
start = res->start + size * j;
rc = pnv_ioda_map_m64_single(phb, win,
base_pe_num + j,
start,
size);
if (rc)
goto m64_failed;
}
}
return 0;
m64_failed:
pnv_pci_vf_release_m64(pdev, num_vfs);
return -EBUSY;
}
static void pnv_ioda_release_vf_PE(struct pci_dev *pdev)
{
struct pnv_phb *phb;
struct pnv_ioda_pe *pe, *pe_n;
phb = pci_bus_to_pnvhb(pdev->bus);
if (!pdev->is_physfn)
return;
/* FIXME: Use pnv_ioda_release_pe()? */
list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) {
if (pe->parent_dev != pdev)
continue;
pnv_pci_ioda2_release_pe_dma(pe);
/* Remove from list */
mutex_lock(&phb->ioda.pe_list_mutex);
list_del(&pe->list);
mutex_unlock(&phb->ioda.pe_list_mutex);
pnv_ioda_deconfigure_pe(phb, pe);
pnv_ioda_free_pe(pe);
}
}
static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset)
{
struct resource *res, res2;
struct pnv_iov_data *iov;
resource_size_t size;
u16 num_vfs;
int i;
if (!dev->is_physfn)
return -EINVAL;
iov = pnv_iov_get(dev);
/*
* "offset" is in VFs. The M64 windows are sized so that when they
* are segmented, each segment is the same size as the IOV BAR.
* Each segment is in a separate PE, and the high order bits of the
* address are the PE number. Therefore, each VF's BAR is in a
* separate PE, and changing the IOV BAR start address changes the
* range of PEs the VFs are in.
*/
num_vfs = iov->num_vfs;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &dev->resource[i + PCI_IOV_RESOURCES];
if (!res->flags || !res->parent)
continue;
if (iov->m64_single_mode[i])
continue;
/*
* The actual IOV BAR range is determined by the start address
* and the actual size for num_vfs VFs BAR. This check is to
* make sure that after shifting, the range will not overlap
* with another device.
*/
size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES);
res2.flags = res->flags;
res2.start = res->start + (size * offset);
res2.end = res2.start + (size * num_vfs) - 1;
if (res2.end > res->end) {
dev_err(&dev->dev, "VF BAR%d: %pR would extend past %pR (trying to enable %d VFs shifted by %d)\n",
i, &res2, res, num_vfs, offset);
return -EBUSY;
}
}
/*
* Since M64 BAR shares segments among all possible 256 PEs,
* we have to shift the beginning of PF IOV BAR to make it start from
* the segment which belongs to the PE number assigned to the first VF.
* This creates a "hole" in the /proc/iomem which could be used for
* allocating other resources so we reserve this area below and
* release when IOV is released.
*/
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &dev->resource[i + PCI_IOV_RESOURCES];
if (!res->flags || !res->parent)
continue;
if (iov->m64_single_mode[i])
continue;
size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES);
res2 = *res;
res->start += size * offset;
dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (%sabling %d VFs shifted by %d)\n",
i, &res2, res, (offset > 0) ? "En" : "Dis",
num_vfs, offset);
if (offset < 0) {
devm_release_resource(&dev->dev, &iov->holes[i]);
memset(&iov->holes[i], 0, sizeof(iov->holes[i]));
}
pci_update_resource(dev, i + PCI_IOV_RESOURCES);
if (offset > 0) {
iov->holes[i].start = res2.start;
iov->holes[i].end = res2.start + size * offset - 1;
iov->holes[i].flags = IORESOURCE_BUS;
iov->holes[i].name = "pnv_iov_reserved";
devm_request_resource(&dev->dev, res->parent,
&iov->holes[i]);
}
}
return 0;
}
static void pnv_pci_sriov_disable(struct pci_dev *pdev)
{
u16 num_vfs, base_pe;
struct pnv_iov_data *iov;
iov = pnv_iov_get(pdev);
if (WARN_ON(!iov))
return;
num_vfs = iov->num_vfs;
base_pe = iov->vf_pe_arr[0].pe_number;
/* Release VF PEs */
pnv_ioda_release_vf_PE(pdev);
/* Un-shift the IOV BARs if we need to */
if (iov->need_shift)
pnv_pci_vf_resource_shift(pdev, -base_pe);
/* Release M64 windows */
pnv_pci_vf_release_m64(pdev, num_vfs);
}
static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
{
struct pnv_phb *phb;
struct pnv_ioda_pe *pe;
int pe_num;
u16 vf_index;
struct pnv_iov_data *iov;
struct pci_dn *pdn;
if (!pdev->is_physfn)
return;
phb = pci_bus_to_pnvhb(pdev->bus);
pdn = pci_get_pdn(pdev);
iov = pnv_iov_get(pdev);
/* Reserve PE for each VF */
for (vf_index = 0; vf_index < num_vfs; vf_index++) {
int vf_devfn = pci_iov_virtfn_devfn(pdev, vf_index);
int vf_bus = pci_iov_virtfn_bus(pdev, vf_index);
struct pci_dn *vf_pdn;
pe = &iov->vf_pe_arr[vf_index];
pe->phb = phb;
pe->flags = PNV_IODA_PE_VF;
pe->pbus = NULL;
pe->parent_dev = pdev;
pe->mve_number = -1;
pe->rid = (vf_bus << 8) | vf_devfn;
pe_num = pe->pe_number;
pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%x\n",
pci_domain_nr(pdev->bus), pdev->bus->number,
PCI_SLOT(vf_devfn), PCI_FUNC(vf_devfn), pe_num);
if (pnv_ioda_configure_pe(phb, pe)) {
/* XXX What do we do here ? */
pnv_ioda_free_pe(pe);
pe->pdev = NULL;
continue;
}
/* Put PE to the list */
mutex_lock(&phb->ioda.pe_list_mutex);
list_add_tail(&pe->list, &phb->ioda.pe_list);
mutex_unlock(&phb->ioda.pe_list_mutex);
/* associate this pe to it's pdn */
list_for_each_entry(vf_pdn, &pdn->parent->child_list, list) {
if (vf_pdn->busno == vf_bus &&
vf_pdn->devfn == vf_devfn) {
vf_pdn->pe_number = pe_num;
break;
}
}
pnv_pci_ioda2_setup_dma_pe(phb, pe);
}
}
static int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
{
struct pnv_ioda_pe *base_pe;
struct pnv_iov_data *iov;
struct pnv_phb *phb;
int ret;
u16 i;
phb = pci_bus_to_pnvhb(pdev->bus);
iov = pnv_iov_get(pdev);
/*
* There's a calls to IODA2 PE setup code littered throughout. We could
* probably fix that, but we'd still have problems due to the
* restriction inherent on IODA1 PHBs.
*
* NB: We class IODA3 as IODA2 since they're very similar.
*/
if (phb->type != PNV_PHB_IODA2) {
pci_err(pdev, "SR-IOV is not supported on this PHB\n");
return -ENXIO;
}
if (!iov) {
dev_info(&pdev->dev, "don't support this SRIOV device with non 64bit-prefetchable IOV BAR\n");
return -ENOSPC;
}
/* allocate a contiguous block of PEs for our VFs */
base_pe = pnv_ioda_alloc_pe(phb, num_vfs);
if (!base_pe) {
pci_err(pdev, "Unable to allocate PEs for %d VFs\n", num_vfs);
return -EBUSY;
}
iov->vf_pe_arr = base_pe;
iov->num_vfs = num_vfs;
/* Assign M64 window accordingly */
ret = pnv_pci_vf_assign_m64(pdev, num_vfs);
if (ret) {
dev_info(&pdev->dev, "Not enough M64 window resources\n");
goto m64_failed;
}
/*
* When using one M64 BAR to map one IOV BAR, we need to shift
* the IOV BAR according to the PE# allocated to the VFs.
* Otherwise, the PE# for the VF will conflict with others.
*/
if (iov->need_shift) {
ret = pnv_pci_vf_resource_shift(pdev, base_pe->pe_number);
if (ret)
goto shift_failed;
}
/* Setup VF PEs */
pnv_ioda_setup_vf_PE(pdev, num_vfs);
return 0;
shift_failed:
pnv_pci_vf_release_m64(pdev, num_vfs);
m64_failed:
for (i = 0; i < num_vfs; i++)
pnv_ioda_free_pe(&iov->vf_pe_arr[i]);
return ret;
}
int pnv_pcibios_sriov_disable(struct pci_dev *pdev)
{
pnv_pci_sriov_disable(pdev);
/* Release PCI data */
remove_sriov_vf_pdns(pdev);
return 0;
}
int pnv_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
{
/* Allocate PCI data */
add_sriov_vf_pdns(pdev);
return pnv_pci_sriov_enable(pdev, num_vfs);
}