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| author | Bjorn Helgaas <bhelgaas@google.com> | 2016-06-17 14:43:34 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-06-17 14:45:03 -0500 |
| commit | 3b146b24a40096d1a42f288e237e24352c93269e (patch) | |
| tree | 30d6f0f41d58bcd0270f9d018f549fb2ec94a9df /arch | |
| parent | 38301358573be7398e43115170f2d76598c8d43b (diff) | |
| download | linux-stable-3b146b24a40096d1a42f288e237e24352c93269e.tar.gz linux-stable-3b146b24a40096d1a42f288e237e24352c93269e.tar.bz2 linux-stable-3b146b24a40096d1a42f288e237e24352c93269e.zip | |
sparc/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()
"User" addresses are shown in /sys/devices/pci.../.../resource and
/proc/bus/pci/devices and used as mmap offsets for /proc/bus/pci/BB/DD.F
files. On sparc, these are PCI bus addresses, i.e., raw BAR values.
Previously pci_resource_to_user() computed the user address by
subtracting either pbm->io_space.start or pbm->mem_space.start from the
resource start.
We've already told the PCI core about those offsets here:
pci_scan_one_pbm()
pci_add_resource_offset(&resources, &pbm->io_space, pbm->io_space.start);
pci_add_resource_offset(&resources, &pbm->mem_space, pbm->mem_space.start);
pci_add_resource_offset(&resources, &pbm->mem64_space, pbm->mem_space.start);
so pcibios_resource_to_bus() knows how to do that translation.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/kernel/pci.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index c2b202d763a1..9c1878f4fa9f 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -986,16 +986,18 @@ void pci_resource_to_user(const struct pci_dev *pdev, int bar, const struct resource *rp, resource_size_t *start, resource_size_t *end) { - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long offset; - - if (rp->flags & IORESOURCE_IO) - offset = pbm->io_space.start; - else - offset = pbm->mem_space.start; + struct pci_bus_region region; - *start = rp->start - offset; - *end = rp->end - offset; + /* + * "User" addresses are shown in /sys/devices/pci.../.../resource + * and /proc/bus/pci/devices and used as mmap offsets for + * /proc/bus/pci/BB/DD.F files (see proc_bus_pci_mmap()). + * + * On sparc, these are PCI bus addresses, i.e., raw BAR values. + */ + pcibios_resource_to_bus(pdev->bus, ®ion, (struct resource *) rp); + *start = region.start; + *end = region.end; } void pcibios_set_master(struct pci_dev *dev) |