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* x86, ioremap: Fix incorrect physical address handling in PAE modeKenji Kaneshige2010-07-09
| | | | | | | | | | | | | | | | | | 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 <kaneshige.kenji@jp.fujitsu.com> LKML-Reference: <4C1AE680.7090408@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* [POWERPC] devres: Add devm_ioremap_prot()Emil Medve2008-05-05
| | | | | | | | | | | | | | 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 <Emilian.Medve@Freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Tejun Heo <htejun@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* devres: support addresses greater than an unsigned long via dev_ioremapKumar Gala2008-04-30
| | | | | | | | | | | | 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 <galak@kernel.crashing.org> Cc: Tejun Heo <htejun@gmail.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* uninline check_signature()Andrew Morton2007-07-16
| | | | | | | | | | | 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 <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* nommu: add ioremap_page_range()Paul Mundt2007-05-15
| | | | | | | | | | | | | | | | 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 <lethal@linux-sh.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Provide dummy devm_ioport_* if !HAS_IOPORTRussell King2007-04-17
| | | | | | | | | | | | 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 <rmk+kernel@arm.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] sort the devres mess outAl Viro2007-02-11
| | | | | | | | | | | | | * 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 <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git-libata-all: forward declare struct deviceAndrew Morton2007-02-09
| | | | | | | | | | 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 declaration Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* devres: implement pcim_iomap_regions()Tejun Heo2007-02-09
| | | | | | | | | 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 <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* devres: device resource managementTejun Heo2007-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] Consolidate check_signatureMatthew Wilcox2006-10-11
| | | | | | | | | | | There's nothing arch-specific about check_signature(), so move it to <linux/io.h>. Use a cross between the Alpha and i386 implementations as the generic one. Signed-off-by: Matthew Wilcox <willy@parisc-linux.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] linux/io.h needs types.hAl Viro2006-10-08
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Generic ioremap_page_range: implementationHaavard Skinnemoen2006-10-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <hskinnemoen@atmel.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Andi Kleen <ak@suse.de> Cc: <linux-m32r@ml.linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] add __iowrite64_copyBrice Goglin2006-06-20
| | | | | | | | | | | | | 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 <brice@myri.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Introduce __iowrite32_copyBryan O'Sullivan2006-02-01
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 <bos@pathscale.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>