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linuxkpi: handle ARI

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Stop trying to manually calculate RID, which cannot be done correctly
by PCI_DEVFN().  Use PCI_GET_RID() method instead.

Do not use pci_find_dbsf() to go from the linux pci_dev to freebsd
device_t.  First, device is readily available as dev.bsddev.  Second,
using pci_find_dbsf() fails for ARI-enabled functions with large
function numbers, because PCI_SLOT()/PCI_FUNC() are for non-ARI.

Reviewed by:	bz, hselasky, manu
Tested by:	manu (drm)
Sponsored by:	Mellanox Technologies/NVidia Networking
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D27960
This commit is contained in:
Konstantin Belousov 2021-01-04 23:41:12 +02:00
parent 04a3ba363d
commit de27805fee
2 changed files with 15 additions and 6 deletions
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20
sys/compat/linuxkpi/common/src/linux_pci.c
View File

@ -68,6 +68,7 @@ __FBSDID("$FreeBSD$");
#include <linux/backlight.h>
#include "backlight_if.h"
#include "pcib_if.h"
static device_probe_t linux_pci_probe;
static device_attach_t linux_pci_attach;
@ -247,12 +248,16 @@ linux_pci_attach_device(device_t dev, struct pci_driver *pdrv,
struct pci_bus *pbus;
struct pci_devinfo *dinfo;
device_t parent;
uintptr_t rid;
int error;
bool isdrm;
linux_set_current(curthread);
if (pdrv != NULL && pdrv->isdrm) {
parent = device_get_parent(dev);
parent = device_get_parent(dev);
isdrm = pdrv != NULL && pdrv->isdrm;
if (isdrm) {
dinfo = device_get_ivars(parent);
device_set_ivars(dev, dinfo);
} else {
@ -262,7 +267,11 @@ linux_pci_attach_device(device_t dev, struct pci_driver *pdrv,
pdev->dev.parent = &linux_root_device;
pdev->dev.bsddev = dev;
INIT_LIST_HEAD(&pdev->dev.irqents);
pdev->devfn = PCI_DEVFN(pci_get_slot(dev), pci_get_function(dev));
if (isdrm)
PCI_GET_ID(device_get_parent(parent), parent, PCI_ID_RID, &rid);
else
PCI_GET_ID(parent, dev, PCI_ID_RID, &rid);
pdev->devfn = rid;
pdev->device = dinfo->cfg.device;
pdev->vendor = dinfo->cfg.vendor;
pdev->subsystem_vendor = dinfo->cfg.subvendor;
@ -487,9 +496,8 @@ pci_resource_start(struct pci_dev *pdev, int bar)
if ((rle = linux_pci_get_bar(pdev, bar)) == NULL)
return (0);
dev = pci_find_dbsf(pdev->bus->domain, pdev->bus->number,
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
MPASS(dev != NULL);
dev = pdev->pdrv != NULL && pdev->pdrv->isdrm ?
device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev;
if (BUS_TRANSLATE_RESOURCE(dev, rle->type, rle->start, &newstart)) {
device_printf(pdev->dev.bsddev, "translate of %#jx failed\n",
(uintmax_t)rle->start);

1
sys/conf/kmod.mk
View File

@ -96,6 +96,7 @@ LINUXKPI_GENSRCS+= \
device_if.h \
pci_if.h \
pci_iov_if.h \
pcib_if.h \
vnode_if.h \
usb_if.h \
opt_usb.h \