10 Jul, 2010
1 commit
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Current x86 ioremap() doesn't handle physical address higher than
32-bit properly in X86_32 PAE mode. When physical address higher than
32-bit is passed to ioremap(), higher 32-bits in physical address is
cleared wrongly. Due to this bug, ioremap() can map wrong address to
linear address space.In my case, 64-bit MMIO region was assigned to a PCI device (ioat
device) on my system. Because of the ioremap()'s bug, wrong physical
address (instead of MMIO region) was mapped to linear address space.
Because of this, loading ioatdma driver caused unexpected behavior
(kernel panic, kernel hangup, ...).Signed-off-by: Kenji Kaneshige
LKML-Reference:
Signed-off-by: H. Peter Anvin
05 May, 2008
1 commit
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We provide an ioremap_flags, so this provides a corresponding
devm_ioremap_prot. The slight name difference is at Ben
Herrenschmidt's request as he plans on changing ioremap_flags to
ioremap_prot in the future.Signed-off-by: Emil Medve
Signed-off-by: Kumar Gala
Acked-by: Tejun Heo
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Paul Mackerras
01 May, 2008
1 commit
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Use a resource_size_t instead of unsigned long since some arch's are
capable of having ioremap deal with addresses greater than the size of a
unsigned long.Signed-off-by: Kumar Gala
Cc: Tejun Heo
Cc: Jeff Garzik
Signed-off-by: Greg Kroah-Hartman
17 Jul, 2007
1 commit
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This is a rather bizarre thing to have inlined in io.h. Stick it in lib/
instead.While we're there, despaghetti it a bit, and fix its off-by-one behaviour when
passed a zero length.Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 May, 2007
1 commit
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lib/ioremap.c is presently only built in if CONFIG_MMU is set. While this
is reasonable, platforms that support both CONFIG_MMU=y or n need to be
able to call in to this regardless.As none of the current nommu platforms do anything special with ioremap(),
we assume that it's always successful.This fixes the SH-4 build with CONFIG_MMU=n.
Signed-off-by: Paul Mundt
Cc: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Apr, 2007
1 commit
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Provide an dummy implementation of devm_ioport_map() and
devm_ioport_unmap() to allow drivers (eg, pata_platform) to build for
platforms where CONFIG_NO_IOPORT is selected.Signed-off-by: Russell King
Cc: Alan Cox
Cc: Jeff Garzik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Feb, 2007
1 commit
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* Split the implementation-agnostic stuff in separate files.
* Make sure that targets using non-default request_irq() pull
kernel/irq/devres.o
* Introduce new symbols (HAS_IOPORT and HAS_IOMEM) defaulting to positive;
allow architectures to turn them off (we needed these symbols anyway for
dependencies of quite a few drivers).
* protect the ioport-related parts of lib/devres.o with CONFIG_HAS_IOPORT.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
10 Feb, 2007
3 commits
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In file included from drivers/infiniband/hw/ipath/ipath_diag.c:44:
include/linux/io.h:35: warning: 'struct device' declared inside parameter list
include/linux/io.h:35: warning: its scope is only this definition or declarationCc: Jeff Garzik
Signed-off-by: Andrew Morton
Signed-off-by: Jeff Garzik -
Implement pcim_iomap_regions(). This function takes mask of BARs to
request and iomap. No BAR should have length of zero. BARs are
iomapped using pcim_iomap_table().Signed-off-by: Tejun Heo
Signed-off-by: Jeff Garzik -
Implement device resource management, in short, devres. A device
driver can allocate arbirary size of devres data which is associated
with a release function. On driver detach, release function is
invoked on the devres data, then, devres data is freed.devreses are typed by associated release functions. Some devreses are
better represented by single instance of the type while others need
multiple instances sharing the same release function. Both usages are
supported.devreses can be grouped using devres group such that a device driver
can easily release acquired resources halfway through initialization
or selectively release resources (e.g. resources for port 1 out of 4
ports).This patch adds devres core including documentation and the following
managed interfaces.* alloc/free : devm_kzalloc(), devm_kzfree()
* IO region : devm_request_region(), devm_release_region()
* IRQ : devm_request_irq(), devm_free_irq()
* DMA : dmam_alloc_coherent(), dmam_free_coherent(),
dmam_declare_coherent_memory(), dmam_pool_create(),
dmam_pool_destroy()
* PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed()
* iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(),
devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(),
pcim_iomap(), pcim_iounmap()Signed-off-by: Tejun Heo
Signed-off-by: Jeff Garzik
12 Oct, 2006
1 commit
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There's nothing arch-specific about check_signature(), so move it to
. Use a cross between the Alpha and i386 implementations as
the generic one.Signed-off-by: Matthew Wilcox
Acked-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Oct, 2006
1 commit
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Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
01 Oct, 2006
1 commit
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This patch adds a generic implementation of ioremap_page_range() in
lib/ioremap.c based on the i386 implementation. It differs from the
i386 version in the following ways:* The PTE flags are passed as a pgprot_t argument and must be
determined up front by the arch-specific code. No additional
PTE flags are added.
* Uses set_pte_at() instead of set_pte()[bunk@stusta.de: warning fix]
]dhowells@redhat.com: nommu build fix]
Signed-off-by: Haavard Skinnemoen
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Mikael Starvik
Cc: Andi Kleen
Cc:
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Martin Schwidefsky
Cc: Paul Mundt
Signed-off-by: Adrian Bunk
Signed-off-by: David Howells
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Jun, 2006
1 commit
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Introduce __iowrite64_copy. It will be used by the Myri-10G Ethernet
driver to post requests to the NIC. This driver will be submitted soon.__iowrite64_copy copies to I/O memory in units of 64 bits when possible (on
64 bit architectures). It reverts to __iowrite32_copy on 32 bit
architectures.Signed-off-by: Brice Goglin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 Feb, 2006
1 commit
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This arch-independent routine copies data to a memory-mapped I/O region,
using 32-bit accesses. The naming is double-underscored to make it clear
that it does not guarantee write ordering, nor does it perform a memory
barrier afterwards; the kernel doc also explicitly states this. This style
of access is required by some devices.This change also introduces include/linux/io.h, at Andrew's suggestion. It
only has one occupant at the moment, but is a logical destination for
oft-replicated contents of include/asm-*/{io,iomap}.h to migrate to.Signed-off-by: Bryan O'Sullivan
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
