lwn.git/arch/sparc/kernel/pci.c, branch docs-6.1

sparc: Use generic pci_mmap_resource_range()

2022-07-29T17:09:32+00:00

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 9eff02e2042f ("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 Signed-off-by: Bjorn Helgaas

PCI: Remove pci_mmap_page_range() wrapper

2022-07-29T17:08:44+00:00

The ARCH_GENERIC_PCI_MMAP_RESOURCE symbol came up in a recent discussion, and I noticed that this was left behind by an unfinished cleanup from 2017. The only architecture that still relies on providing its own pci_mmap_page_range() helper instead of using the generic pci_mmap_resource_range() is sparc. Presumably the reasons for this have not changed, but at least this can be simplified by converting sparc to use the same interface as the others. The only difference between the two is the device-specific offset that gets added to or subtracted from vma->vm_pgoff. Change the only caller of pci_mmap_page_range() in common code to subtract this offset and call the modern interface, while adding it back in the sparc implementation to preserve the existing behavior. This removes the complexities of the dual interfaces from the common code, and keeps it all specific to the sparc architecture code. According to David Miller, the sparc code lets user space poke into the VGA I/O port registers by mmapping the I/O space of the parent bridge device, which is something that the generic pci_mmap_resource_range() code apparently does not. Link: https://lore.kernel.org/lkml/1519887203.622.3.camel@infradead.org/t/ Link: https://lore.kernel.org/lkml/20220714214657.2402250-3-shorne@gmail.com/ Link: https://lore.kernel.org/r/20220715153617.3393420-1-arnd@kernel.org Signed-off-by: Arnd Bergmann Signed-off-by: Bjorn Helgaas Cc: David Woodhouse Cc: David S. Miller Cc: Stafford Horne

PCI: Rename pcibios_add_device() to pcibios_device_add()

2021-09-21T20:26:09+00:00

The general convention for pcibios_* hooks is that they're named after the corresponding pci_* function they provide a hook for. The exception is pcibios_add_device() which provides a hook for pci_device_add(). Rename pcibios_add_device() to pcibios_device_add() so it matches pci_device_add(). Also, remove the export of the microblaze version. The only caller must be compiled as a built-in so there's no reason for the export. Link: https://lore.kernel.org/r/20210913152709.48013-1-oohall@gmail.com Signed-off-by: Oliver O'Halloran Signed-off-by: Bjorn Helgaas Acked-by: Niklas Schnelle # s390

sparc: use for_each_child_of_node() macro

2020-08-06T00:51:51+00:00

Use for_each_child_of_node() macro instead of open coding it. Signed-off-by: Qinglang Miao Signed-off-by: David S. Miller

mm: reorder includes after introduction of linux/pgtable.h

2020-06-09T16:39:13+00:00

The replacement of with made the include of the latter in the middle of asm includes. Fix this up with the aid of the below script and manual adjustments here and there. import sys import re if len(sys.argv) is not 3: print "USAGE: %s

" % (sys.argv[0]) sys.exit(1) hdr_to_move="#include " % sys.argv[2] moved = False in_hdrs = False with open(sys.argv[1], "r") as f: lines = f.readlines() for _line in lines: line = _line.rstrip(' ') if line == hdr_to_move: continue if line.startswith("#include Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org Signed-off-by: Linus Torvalds

mm: introduce include/linux/pgtable.h

2020-06-09T16:39:13+00:00

The include/linux/pgtable.h is going to be the home of generic page table manipulation functions. Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and make the latter include asm/pgtable.h. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org Signed-off-by: Linus Torvalds

sparc: use scnprintf() in show_pciobppath_attr() in pci.c

2020-05-13T22:35:58+00:00

snprintf() returns the number of bytes that would be written, which may be greater than the the actual length to be written. show_pciobppath_attr() should return the number of bytes printed into the buffer. This is the return value of scnprintf(). Signed-off-by: Chen Zhou Signed-off-by: David S. Miller

sparc64: refactor the ali DMA quirk

2019-02-20T14:28:53+00:00

Do the quirk first in the dma_supported routines, as we don't need any of the other checks for it, and remove the duplicate mask checking that is already done by the callers. Signed-off-by: Christoph Hellwig Acked-by: David S. Miller

sparc: Use device_type helpers to access the node type

2018-11-18T21:35:21+00:00

Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Replace the open coded iterating over child nodes with for_each_child_of_node() while we're here. Cc: "David S. Miller" Cc: sparclinux@vger.kernel.org Signed-off-by: Rob Herring Signed-off-by: David S. Miller

sparc: Use of_node_name_eq for node name comparisons

2018-11-18T21:35:21+00:00

Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. Cc: "David S. Miller" Cc: sparclinux@vger.kernel.org Signed-off-by: Rob Herring Signed-off-by: David S. Miller