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powerpc/powernv: Shift VF resource with an offset 

On PowerNV platform, resource position in M64 BAR implies the PE# the
resource belongs to. In some cases, adjustment of a resource is necessary
to locate it to a correct position in M64 BAR .

This patch adds pnv_pci_vf_resource_shift() to shift the 'real' PF IOV BAR
address according to an offset.

Note:

    After doing so, there would be a "hole" in the /proc/iomem when offset
    is a positive value. It looks like the device return some mmio back to
    the system, which actually no one could use it.

[bhelgaas: rework loops, rework overlap check, index resource[]
conventionally, remove pci_regs.h include, squashed with next patch]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Wei Yang 2015-03-25 16:23:57 +08:00 committed by Benjamin Herrenschmidt
parent 5350ab3fd7
commit 781a868f31
5 changed files with 553 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/include/asm/pci-bridge.h
View File

@ -180,6 +180,10 @@ struct pci_dn {
int pe_number;
#ifdef CONFIG_PCI_IOV
u16 vfs_expanded; /* number of VFs IOV BAR expanded */
u16 num_vfs; /* number of VFs enabled*/
int offset; /* PE# for the first VF PE */
#define IODA_INVALID_M64 (-1)
int m64_wins[PCI_SRIOV_NUM_BARS];
#endif /* CONFIG_PCI_IOV */
#endif
struct list_head child_list;

13
arch/powerpc/kernel/pci_dn.c
View File

@ -217,6 +217,19 @@ void remove_dev_pci_data(struct pci_dev *pdev)
struct pci_dn *pdn, *tmp;
int i;
/*
* VF and VF PE are created/released dynamically, so we need to
* bind/unbind them. Otherwise the VF and VF PE would be mismatched
* when re-enabling SR-IOV.
*/
if (pdev->is_virtfn) {
pdn = pci_get_pdn(pdev);
#ifdef CONFIG_PPC_POWERNV
pdn->pe_number = IODA_INVALID_PE;
#endif
return;
}
/* Only support IOV PF for now */
if (!pdev->is_physfn)
return;

528
arch/powerpc/platforms/powernv/pci-ioda.c
View File

@ -44,6 +44,9 @@
#include "powernv.h"
#include "pci.h"
/* 256M DMA window, 4K TCE pages, 8 bytes TCE */
#define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8)
static void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
const char *fmt, ...)
{
@ -56,11 +59,18 @@ static void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
vaf.fmt = fmt;
vaf.va = &args;
if (pe->pdev)
if (pe->flags & PNV_IODA_PE_DEV)
strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
else
else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))
sprintf(pfix, "%04x:%02x ",
pci_domain_nr(pe->pbus), pe->pbus->number);
#ifdef CONFIG_PCI_IOV
else if (pe->flags & PNV_IODA_PE_VF)
sprintf(pfix, "%04x:%02x:%2x.%d",
pci_domain_nr(pe->parent_dev->bus),
(pe->rid & 0xff00) >> 8,
PCI_SLOT(pe->rid), PCI_FUNC(pe->rid));
#endif /* CONFIG_PCI_IOV*/
printk("%spci %s: [PE# %.3d] %pV",
level, pfix, pe->pe_number, &vaf);
@ -591,7 +601,7 @@ static int pnv_ioda_set_peltv(struct pnv_phb *phb,
bool is_add)
{
struct pnv_ioda_pe *slave;
struct pci_dev *pdev;
struct pci_dev *pdev = NULL;
int ret;
/*
@ -630,8 +640,12 @@ static int pnv_ioda_set_peltv(struct pnv_phb *phb,
if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS))
pdev = pe->pbus->self;
else
else if (pe->flags & PNV_IODA_PE_DEV)
pdev = pe->pdev->bus->self;
#ifdef CONFIG_PCI_IOV
else if (pe->flags & PNV_IODA_PE_VF)
pdev = pe->parent_dev->bus->self;
#endif /* CONFIG_PCI_IOV */
while (pdev) {
struct pci_dn *pdn = pci_get_pdn(pdev);
struct pnv_ioda_pe *parent;
@ -649,6 +663,87 @@ static int pnv_ioda_set_peltv(struct pnv_phb *phb,
return 0;
}
#ifdef CONFIG_PCI_IOV
static int pnv_ioda_deconfigure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
{
struct pci_dev *parent;
uint8_t bcomp, dcomp, fcomp;
int64_t rc;
long rid_end, rid;
/* Currently, we just deconfigure VF PE. Bus PE will always there.*/
if (pe->pbus) {
int count;
dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
parent = pe->pbus->self;
if (pe->flags & PNV_IODA_PE_BUS_ALL)
count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1;
else
count = 1;
switch(count) {
case 1: bcomp = OpalPciBusAll; break;
case 2: bcomp = OpalPciBus7Bits; break;
case 4: bcomp = OpalPciBus6Bits; break;
case 8: bcomp = OpalPciBus5Bits; break;
case 16: bcomp = OpalPciBus4Bits; break;
case 32: bcomp = OpalPciBus3Bits; break;
default:
dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n",
count);
/* Do an exact match only */
bcomp = OpalPciBusAll;
}
rid_end = pe->rid + (count << 8);
} else {
if (pe->flags & PNV_IODA_PE_VF)
parent = pe->parent_dev;
else
parent = pe->pdev->bus->self;
bcomp = OpalPciBusAll;
dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
rid_end = pe->rid + 1;
}
/* Clear the reverse map */
for (rid = pe->rid; rid < rid_end; rid++)
phb->ioda.pe_rmap[rid] = 0;
/* Release from all parents PELT-V */
while (parent) {
struct pci_dn *pdn = pci_get_pdn(parent);
if (pdn && pdn->pe_number != IODA_INVALID_PE) {
rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number,
pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN);
/* XXX What to do in case of error ? */
}
parent = parent->bus->self;
}
opal_pci_eeh_freeze_set(phb->opal_id, pe->pe_number,
OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
/* Disassociate PE in PELT */
rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number,
pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN);
if (rc)
pe_warn(pe, "OPAL error %ld remove self from PELTV\n", rc);
rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
bcomp, dcomp, fcomp, OPAL_UNMAP_PE);
if (rc)
pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
pe->pbus = NULL;
pe->pdev = NULL;
pe->parent_dev = NULL;
return 0;
}
#endif /* CONFIG_PCI_IOV */
static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
{
struct pci_dev *parent;
@ -675,15 +770,19 @@ static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
case 16: bcomp = OpalPciBus4Bits; break;
case 32: bcomp = OpalPciBus3Bits; break;
default:
pr_err("%s: Number of subordinate busses %d"
" unsupported\n",
pci_name(pe->pbus->self), count);
dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n",
count);
/* Do an exact match only */
bcomp = OpalPciBusAll;
}
rid_end = pe->rid + (count << 8);
} else {
parent = pe->pdev->bus->self;
#ifdef CONFIG_PCI_IOV
if (pe->flags & PNV_IODA_PE_VF)
parent = pe->parent_dev;
else
#endif /* CONFIG_PCI_IOV */
parent = pe->pdev->bus->self;
bcomp = OpalPciBusAll;
dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
@ -774,6 +873,78 @@ static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev)
return 10;
}
#ifdef CONFIG_PCI_IOV
static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset)
{
struct pci_dn *pdn = pci_get_pdn(dev);
int i;
struct resource *res, res2;
resource_size_t size;
u16 num_vfs;
if (!dev->is_physfn)
return -EINVAL;
/*
* "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 = pdn->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 (!pnv_pci_is_mem_pref_64(res->flags))
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;
}
}
/*
* After doing so, there would be a "hole" in the /proc/iomem when
* offset is a positive value. It looks like the device return some
* mmio back to the system, which actually no one could use it.
*/
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = &dev->resource[i + PCI_IOV_RESOURCES];
if (!res->flags || !res->parent)
continue;
if (!pnv_pci_is_mem_pref_64(res->flags))
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 (enabling %d VFs shifted by %d)\n",
i, &res2, res, num_vfs, offset);
pci_update_resource(dev, i + PCI_IOV_RESOURCES);
}
return 0;
}
#endif /* CONFIG_PCI_IOV */
#if 0
static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev)
{
@ -979,8 +1150,316 @@ static void pnv_pci_ioda_setup_PEs(void)
}
#ifdef CONFIG_PCI_IOV
static int pnv_pci_vf_release_m64(struct pci_dev *pdev)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pci_dn *pdn;
int i;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
pdn = pci_get_pdn(pdev);
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
if (pdn->m64_wins[i] == IODA_INVALID_M64)
continue;
opal_pci_phb_mmio_enable(phb->opal_id,
OPAL_M64_WINDOW_TYPE, pdn->m64_wins[i], 0);
clear_bit(pdn->m64_wins[i], &phb->ioda.m64_bar_alloc);
pdn->m64_wins[i] = IODA_INVALID_M64;
}
return 0;
}
static int pnv_pci_vf_assign_m64(struct pci_dev *pdev)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pci_dn *pdn;
unsigned int win;
struct resource *res;
int i;
int64_t rc;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
pdn = pci_get_pdn(pdev);
/* Initialize the m64_wins to IODA_INVALID_M64 */
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++)
pdn->m64_wins[i] = IODA_INVALID_M64;
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_mem_pref_64(res->flags))
continue;
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)
goto m64_failed;
} while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc));
pdn->m64_wins[i] = win;
/* Map the M64 here */
rc = opal_pci_set_phb_mem_window(phb->opal_id,
OPAL_M64_WINDOW_TYPE,
pdn->m64_wins[i],
res->start,
0, /* unused */
resource_size(res));
if (rc != OPAL_SUCCESS) {
dev_err(&pdev->dev, "Failed to map M64 window #%d: %lld\n",
win, rc);
goto m64_failed;
}
rc = opal_pci_phb_mmio_enable(phb->opal_id,
OPAL_M64_WINDOW_TYPE, pdn->m64_wins[i], 1);
if (rc != OPAL_SUCCESS) {
dev_err(&pdev->dev, "Failed to enable M64 window #%d: %llx\n",
win, rc);
goto m64_failed;
}
}
return 0;
m64_failed:
pnv_pci_vf_release_m64(pdev);
return -EBUSY;
}
static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct iommu_table *tbl;
unsigned long addr;
int64_t rc;
bus = dev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
tbl = pe->tce32_table;
addr = tbl->it_base;
opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
pe->pe_number << 1, 1, __pa(addr),
0, 0x1000);
rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id,
pe->pe_number,
(pe->pe_number << 1) + 1,
pe->tce_bypass_base,
0);
if (rc)
pe_warn(pe, "OPAL error %ld release DMA window\n", rc);
iommu_free_table(tbl, of_node_full_name(dev->dev.of_node));
free_pages(addr, get_order(TCE32_TABLE_SIZE));
pe->tce32_table = NULL;
}
static void pnv_ioda_release_vf_PE(struct pci_dev *pdev)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pnv_ioda_pe *pe, *pe_n;
struct pci_dn *pdn;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
if (!pdev->is_physfn)
return;
pdn = pci_get_pdn(pdev);
list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) {
if (pe->parent_dev != pdev)
continue;
pnv_pci_ioda2_release_dma_pe(pdev, 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(phb, pe->pe_number);
}
}
void pnv_pci_sriov_disable(struct pci_dev *pdev)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pci_dn *pdn;
struct pci_sriov *iov;
u16 num_vfs;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
pdn = pci_get_pdn(pdev);
iov = pdev->sriov;
num_vfs = pdn->num_vfs;
/* Release VF PEs */
pnv_ioda_release_vf_PE(pdev);
if (phb->type == PNV_PHB_IODA2) {
pnv_pci_vf_resource_shift(pdev, -pdn->offset);
/* Release M64 windows */
pnv_pci_vf_release_m64(pdev);
/* Release PE numbers */
bitmap_clear(phb->ioda.pe_alloc, pdn->offset, num_vfs);
pdn->offset = 0;
}
}
static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
struct pnv_ioda_pe *pe);
static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pnv_ioda_pe *pe;
int pe_num;
u16 vf_index;
struct pci_dn *pdn;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
pdn = pci_get_pdn(pdev);
if (!pdev->is_physfn)
return;
/* Reserve PE for each VF */
for (vf_index = 0; vf_index < num_vfs; vf_index++) {
pe_num = pdn->offset + vf_index;
pe = &phb->ioda.pe_array[pe_num];
pe->pe_number = pe_num;
pe->phb = phb;
pe->flags = PNV_IODA_PE_VF;
pe->pbus = NULL;
pe->parent_dev = pdev;
pe->tce32_seg = -1;
pe->mve_number = -1;
pe->rid = (pci_iov_virtfn_bus(pdev, vf_index) << 8) |
pci_iov_virtfn_devfn(pdev, vf_index);
pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%d\n",
hose->global_number, pdev->bus->number,
PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)),
PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pe_num);
if (pnv_ioda_configure_pe(phb, pe)) {
/* XXX What do we do here ? */
if (pe_num)
pnv_ioda_free_pe(phb, pe_num);
pe->pdev = NULL;
continue;
}
pe->tce32_table = kzalloc_node(sizeof(struct iommu_table),
GFP_KERNEL, hose->node);
pe->tce32_table->data = pe;
/* 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);
pnv_pci_ioda2_setup_dma_pe(phb, pe);
}
}
int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
{
struct pci_bus *bus;
struct pci_controller *hose;
struct pnv_phb *phb;
struct pci_dn *pdn;
int ret;
bus = pdev->bus;
hose = pci_bus_to_host(bus);
phb = hose->private_data;
pdn = pci_get_pdn(pdev);
if (phb->type == PNV_PHB_IODA2) {
/* Calculate available PE for required VFs */
mutex_lock(&phb->ioda.pe_alloc_mutex);
pdn->offset = bitmap_find_next_zero_area(
phb->ioda.pe_alloc, phb->ioda.total_pe,
0, num_vfs, 0);
if (pdn->offset >= phb->ioda.total_pe) {
mutex_unlock(&phb->ioda.pe_alloc_mutex);
dev_info(&pdev->dev, "Failed to enable VF%d\n", num_vfs);
pdn->offset = 0;
return -EBUSY;
}
bitmap_set(phb->ioda.pe_alloc, pdn->offset, num_vfs);
pdn->num_vfs = num_vfs;
mutex_unlock(&phb->ioda.pe_alloc_mutex);
/* Assign M64 window accordingly */
ret = pnv_pci_vf_assign_m64(pdev);
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.
*/
ret = pnv_pci_vf_resource_shift(pdev, pdn->offset);
if (ret)
goto m64_failed;
}
/* Setup VF PEs */
pnv_ioda_setup_vf_PE(pdev, num_vfs);
return 0;
m64_failed:
bitmap_clear(phb->ioda.pe_alloc, pdn->offset, num_vfs);
pdn->offset = 0;
return ret;
}
int pcibios_sriov_disable(struct pci_dev *pdev)
{
pnv_pci_sriov_disable(pdev);
/* Release PCI data */
remove_dev_pci_data(pdev);
return 0;
@ -990,6 +1469,8 @@ int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
{
/* Allocate PCI data */
add_dev_pci_data(pdev);
pnv_pci_sriov_enable(pdev, num_vfs);
return 0;
}
#endif /* CONFIG_PCI_IOV */
@ -1186,9 +1667,6 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
int64_t rc;
void *addr;
/* 256M DMA window, 4K TCE pages, 8 bytes TCE */
#define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8)
/* XXX FIXME: Handle 64-bit only DMA devices */
/* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
/* XXX FIXME: Allocate multi-level tables on PHB3 */
@ -1251,12 +1729,19 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
TCE_PCI_SWINV_PAIR);
}
iommu_init_table(tbl, phb->hose->node);
iommu_register_group(tbl, phb->hose->global_number, pe->pe_number);
if (pe->pdev)
if (pe->flags & PNV_IODA_PE_DEV) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
set_iommu_table_base_and_group(&pe->pdev->dev, tbl);
else
} else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
pnv_ioda_setup_bus_dma(pe, pe->pbus, true);
} else if (pe->flags & PNV_IODA_PE_VF) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
}
return;
fail:
@ -1383,12 +1868,19 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
}
iommu_init_table(tbl, phb->hose->node);
iommu_register_group(tbl, phb->hose->global_number, pe->pe_number);
if (pe->pdev)
if (pe->flags & PNV_IODA_PE_DEV) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
set_iommu_table_base_and_group(&pe->pdev->dev, tbl);
else
} else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
pnv_ioda_setup_bus_dma(pe, pe->pbus, true);
} else if (pe->flags & PNV_IODA_PE_VF) {
iommu_register_group(tbl, phb->hose->global_number,
pe->pe_number);
}
/* Also create a bypass window */
if (!pnv_iommu_bypass_disabled)
@ -2068,6 +2560,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
phb->hub_id = hub_id;
phb->opal_id = phb_id;
phb->type = ioda_type;
mutex_init(&phb->ioda.pe_alloc_mutex);
/* Detect specific models for error handling */
if (of_device_is_compatible(np, "ibm,p7ioc-pciex"))
@ -2127,6 +2620,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
INIT_LIST_HEAD(&phb->ioda.pe_dma_list);
INIT_LIST_HEAD(&phb->ioda.pe_list);
mutex_init(&phb->ioda.pe_list_mutex);
/* Calculate how many 32-bit TCE segments we have */
phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28;

18
arch/powerpc/platforms/powernv/pci.c
View File

@ -714,6 +714,24 @@ static void pnv_pci_dma_dev_setup(struct pci_dev *pdev)
{
struct pci_controller *hose = pci_bus_to_host(pdev->bus);
struct pnv_phb *phb = hose->private_data;
#ifdef CONFIG_PCI_IOV
struct pnv_ioda_pe *pe;
struct pci_dn *pdn;
/* Fix the VF pdn PE number */
if (pdev->is_virtfn) {
pdn = pci_get_pdn(pdev);
WARN_ON(pdn->pe_number != IODA_INVALID_PE);
list_for_each_entry(pe, &phb->ioda.pe_list, list) {
if (pe->rid == ((pdev->bus->number << 8) |
(pdev->devfn & 0xff))) {
pdn->pe_number = pe->pe_number;
pe->pdev = pdev;
break;
}
}
}
#endif /* CONFIG_PCI_IOV */
/* If we have no phb structure, try to setup a fallback based on
* the device-tree (RTAS PCI for example)

7
arch/powerpc/platforms/powernv/pci.h
View File

@ -23,6 +23,7 @@ enum pnv_phb_model {
#define PNV_IODA_PE_BUS_ALL (1 << 2) /* PE has subordinate buses */
#define PNV_IODA_PE_MASTER (1 << 3) /* Master PE in compound case */
#define PNV_IODA_PE_SLAVE (1 << 4) /* Slave PE in compound case */
#define PNV_IODA_PE_VF (1 << 5) /* PE for one VF */
/* Data associated with a PE, including IOMMU tracking etc.. */
struct pnv_phb;
@ -34,6 +35,9 @@ struct pnv_ioda_pe {
* entire bus (& children). In the former case, pdev
* is populated, in the later case, pbus is.
*/
#ifdef CONFIG_PCI_IOV
struct pci_dev *parent_dev;
#endif
struct pci_dev *pdev;
struct pci_bus *pbus;
@ -145,6 +149,8 @@ struct pnv_phb {
/* PE allocation bitmap */
unsigned long *pe_alloc;
/* PE allocation mutex */
struct mutex pe_alloc_mutex;
/* M32 & IO segment maps */
unsigned int *m32_segmap;
@ -159,6 +165,7 @@ struct pnv_phb {
* on the sequence of creation
*/
struct list_head pe_list;
struct mutex pe_list_mutex;
/* Reverse map of PEs, will have to extend if
* we are to support more than 256 PEs, indexed