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Krzysztof WilczyńskiandBjorn Helgaas
4e14b965a6
Currently, legacy_io and legacy_mem are dynamically allocated and created by pci_create_legacy_files(), with pci_adjust_legacy_attr() updating the attributes at runtime on Alpha to rename them and shift the size for sparse addressing. Convert to four static const attributes (legacy_io, legacy_io_sparse, legacy_mem, legacy_mem_sparse) with .is_bin_visible() callbacks that use pci_legacy_has_sparse() to select the appropriate variant per bus. The sizes are compile-time constants and .size is set directly on each attribute. Register the groups in pcibus_groups[] under a HAVE_PCI_LEGACY guard so the driver model handles creation and removal automatically. Stub out pci_create_legacy_files() and pci_remove_legacy_files() as the dynamic creation is no longer needed. Remove the __weak pci_adjust_legacy_attr(), Alpha's override, and its declaration from both Alpha and PowerPC asm/pci.h headers. Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com> Link: https://patch.msgid.link/20260508043543.217179-23-kwilczynski@kernel.org
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ALPHA_PCI_H
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#define __ALPHA_PCI_H
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#ifdef __KERNEL__
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#include <linux/spinlock.h>
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#include <linux/dma-mapping.h>
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#include <linux/scatterlist.h>
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#include <asm/machvec.h>
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/*
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* The following structure is used to manage multiple PCI busses.
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*/
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struct pci_iommu_arena;
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struct page;
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/* A controller. Used to manage multiple PCI busses. */
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struct pci_controller {
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struct pci_controller *next;
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struct pci_bus *bus;
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struct resource *io_space;
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struct resource *mem_space;
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/* The following are for reporting to userland. The invariant is
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that if we report a BWX-capable dense memory, we do not report
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a sparse memory at all, even if it exists. */
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unsigned long sparse_mem_base;
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unsigned long dense_mem_base;
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unsigned long sparse_io_base;
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unsigned long dense_io_base;
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/* This one's for the kernel only. It's in KSEG somewhere. */
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unsigned long config_space_base;
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unsigned int index;
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/* For compatibility with current (as of July 2003) pciutils
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and XFree86. Eventually will be removed. */
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unsigned int need_domain_info;
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struct pci_iommu_arena *sg_pci;
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struct pci_iommu_arena *sg_isa;
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void *sysdata;
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};
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/* Override the logic in pci_scan_bus for skipping already-configured
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bus numbers. */
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#define pcibios_assign_all_busses() 1
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#define PCIBIOS_MIN_IO alpha_mv.min_io_address
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#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
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/* IOMMU controls. */
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#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
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static inline int pci_proc_domain(struct pci_bus *bus)
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{
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struct pci_controller *hose = bus->sysdata;
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return hose->need_domain_info;
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}
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#endif /* __KERNEL__ */
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/* Values for the `which' argument to sys_pciconfig_iobase. */
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#define IOBASE_HOSE 0
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#define IOBASE_SPARSE_MEM 1
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#define IOBASE_DENSE_MEM 2
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#define IOBASE_SPARSE_IO 3
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#define IOBASE_DENSE_IO 4
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#define IOBASE_ROOT_BUS 5
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#define IOBASE_FROM_HOSE 0x10000
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extern struct pci_dev *isa_bridge;
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extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
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size_t count);
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extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
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size_t count);
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extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
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struct vm_area_struct *vma,
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enum pci_mmap_state mmap_state);
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extern bool pci_legacy_has_sparse(struct pci_bus *bus,
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enum pci_mmap_state type);
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#define HAVE_PCI_LEGACY 1
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extern const struct attribute_group pci_dev_resource_attr_group;
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extern const struct attribute_group pci_dev_resource_sparse_attr_group;
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extern const struct attribute_group pci_dev_resource_dense_attr_group;
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#define ARCH_PCI_DEV_GROUPS \
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&pci_dev_resource_attr_group, \
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&pci_dev_resource_sparse_attr_group, \
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&pci_dev_resource_dense_attr_group,
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#endif /* __ALPHA_PCI_H */
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