kernel/linux.git/include/linux/io.h, branch v6.6.132

x86/mm: Add early_memremap_pgprot_adjust() prototype

2023-05-18T18:56:18+00:00

early_memremap_pgprot_adjust() is a __weak function with a local prototype, but x86 has a custom implementation that does not see the prototype, causing a W=1 warning: arch/x86/mm/ioremap.c:785:17: error: no previous prototype for 'early_memremap_pgprot_adjust' [-Werror=missing-prototypes] Move the declaration into the global linux/io.h header to avoid this. Signed-off-by: Arnd Bergmann Signed-off-by: Dave Hansen Reviewed-by: Alexander Lobakin Link: https://lore.kernel.org/all/20230516193549.544673-19-arnd%40kernel.org

devres: remove devm_ioremap_np

2022-09-01T16:04:43+00:00

devm_ioremap_np has never been used anywhere since it was added in early 2021, so remove it. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220822061424.151819-1-hch@lst.de Signed-off-by: Greg Kroah-Hartman

lib: devres: Add managed arch_io_reserve_memtype_wc()

2021-09-23T07:25:59+00:00

Add devm_arch_io_reserve_memtype_wc() as managed wrapper around arch_io_reserve_memtype_wc(). Useful for several graphics drivers that set framebuffer memory to write combining. v2: * fix typo in commit description Signed-off-by: Thomas Zimmermann Reviewed-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20210916181601.9146-3-tzimmermann@suse.de

lib: devres: Add managed arch_phys_wc_add()

2021-09-23T07:25:30+00:00

Add devm_arch_phys_wc_add() as managed wrapper around arch_phys_wc_add(). Useful for several graphics drivers that set framebuffer memory to write combining. v2: * fix typo in commit description Signed-off-by: Thomas Zimmermann Reviewed-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20210916181601.9146-2-tzimmermann@suse.de

mm: HUGE_VMAP arch support cleanup

2021-04-30T18:20:40+00:00

This changes the awkward approach where architectures provide init functions to determine which levels they can provide large mappings for, to one where the arch is queried for each call. This removes code and indirection, and allows constant-folding of dead code for unsupported levels. This also adds a prot argument to the arch query. This is unused currently but could help with some architectures (e.g., some powerpc processors can't map uncacheable memory with large pages). Link: https://lkml.kernel.org/r/20210317062402.533919-7-npiggin@gmail.com Signed-off-by: Nicholas Piggin Reviewed-by: Ding Tianhong Acked-by: Catalin Marinas [arm64] Cc: Will Deacon Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Christoph Hellwig Cc: Miaohe Lin Cc: Michael Ellerman Cc: Russell King Cc: Uladzislau Rezki (Sony) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

asm-generic/io.h: implement pci_remap_cfgspace using ioremap_np

2021-04-08T11:18:38+00:00

Now that we have ioremap_np(), we can make pci_remap_cfgspace() default to it, falling back to ioremap() on platforms where it is not available. Remove the arm64 implementation, since that is now redundant. Future cleanups should be able to do the same for other arches, and eventually make the generic pci_remap_cfgspace() unconditional. Acked-by: Will Deacon Signed-off-by: Hector Martin

asm-generic/io.h: Add a non-posted variant of ioremap()

2021-04-08T11:18:38+00:00

ARM64 currently defaults to posted MMIO (nGnRE), but some devices require the use of non-posted MMIO (nGnRnE). Introduce a new ioremap() variant to handle this case. ioremap_np() returns NULL on arches that do not implement this variant. sparc64 is the only architecture that needs to be touched directly, because it includes neither of the generic io.h or iomap.h headers. This adds the IORESOURCE_MEM_NONPOSTED flag, which maps to this variant and marks a given resource as requiring non-posted mappings. This is implemented in the resource system because it is a SoC-level requirement, so existing drivers do not need special-case code to pick this ioremap variant. Then this is implemented in devres by introducing devm_ioremap_np(), and making devm_ioremap_resource() automatically select this variant when the resource has the IORESOURCE_MEM_NONPOSTED flag set. Acked-by: Marc Zyngier Signed-off-by: Hector Martin

mm/memremap_pages: Kill unused __devm_memremap_pages()

2020-02-19T19:21:41+00:00

Kill this definition that was introduced in commit 41e94a851304 ("add devm_memremap_pages") add never used. Cc: Christoph Hellwig Reviewed-by: Aneesh Kumar K.V Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/158041476158.3889308.4221100673554151124.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams

remove ioremap_nocache and devm_ioremap_nocache

2020-01-06T08:45:59+00:00

ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig Acked-by: Arnd Bergmann

lib: devres: add a helper function for ioremap_uc

2019-11-11T08:40:18+00:00

Implement a resource managed strongly uncachable ioremap function. Cc: # v4.19+ Tested-by: AceLan Kao Signed-off-by: Tuowen Zhao Acked-by: Mika Westerberg Acked-by: Andy Shevchenko Acked-by: Luis Chamberlain Signed-off-by: Lee Jones