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c1ef322491
The main feature of the sparc-specific implementation of
pci_mmap_resource_range() is that it allows mapping the entire PCI I/O
space for a PCI host bridge using the /proc/bus/pci interface on a bridge
device.
The generic implementation cannot do this, but it also appears that this
got broken for sparc by commit 9eff02e204 ("PCI: check mmap range of
/proc/bus/pci files too"), which enforces that each address is part of a
BAR for kernels after 2.6.28.
Remove it all, assuming that the corresponding user space code has already
been changed to access /dev/ioport instead a long time ago. Add
pci_iobar_pfn() to make it possible to map I/O resources. This is adapted
from the powerpc version.
Link: https://lore.kernel.org/lkml/1519887203.622.3.camel@infradead.org/t/
Link: https://lore.kernel.org/r/20220715153617.3393420-2-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ___ASM_SPARC_PCI_H
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#define ___ASM_SPARC_PCI_H
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/* Can be used to override the logic in pci_scan_bus for skipping
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* already-configured bus numbers - to be used for buggy BIOSes
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* or architectures with incomplete PCI setup by the loader.
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*/
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#define pcibios_assign_all_busses() 0
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#define PCIBIOS_MIN_IO 0UL
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#define PCIBIOS_MIN_MEM 0UL
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#define PCI_IRQ_NONE 0xffffffff
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#ifdef CONFIG_SPARC64
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/* PCI IOMMU mapping bypass support. */
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/* PCI 64-bit addressing works for all slots on all controller
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* types on sparc64. However, it requires that the device
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* can drive enough of the 64 bits.
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*/
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#define PCI64_REQUIRED_MASK (~(u64)0)
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#define PCI64_ADDR_BASE 0xfffc000000000000UL
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/* Return the index of the PCI controller for device PDEV. */
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int pci_domain_nr(struct pci_bus *bus);
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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return 1;
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}
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/* Platform support for /proc/bus/pci/X/Y mmap()s. */
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#define HAVE_PCI_MMAP
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#define arch_can_pci_mmap_io() 1
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#define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
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#define ARCH_GENERIC_PCI_MMAP_RESOURCE
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#define get_pci_unmapped_area get_fb_unmapped_area
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#endif /* CONFIG_SPARC64 */
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#if defined(CONFIG_SPARC64) || defined(CONFIG_LEON_PCI)
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static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
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{
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return PCI_IRQ_NONE;
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}
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#else
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#include <asm-generic/pci.h>
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#endif
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#endif /* ___ASM_SPARC_PCI_H */
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