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* common: dma-mapping: introduce dma_get_sgtable() functionMarek Szyprowski2012-07-301-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds dma_get_sgtable() function which is required to let drivers to share the buffers allocated by DMA-mapping subsystem. Right now the driver gets a dma address of the allocated buffer and the kernel virtual mapping for it. If it wants to share it with other device (= map into its dma address space) it usually hacks around kernel virtual addresses to get pointers to pages or assumes that both devices share the DMA address space. Both solutions are just hacks for the special cases, which should be avoided in the final version of buffer sharing. To solve this issue in a generic way, a new call to DMA mapping has been introduced - dma_get_sgtable(). It allocates a scatter-list which describes the allocated buffer and lets the driver(s) to use it with other device(s) by calling dma_map_sg() on it. This patch provides a generic implementation based on virt_to_page() call. Architectures which require more sophisticated translation might provide their own get_sgtable() methods. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* Merge branch 'for-linus' of ↵Linus Torvalds2012-04-041-4/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/mszyprowski/linux-dma-mapping Pull DMA mapping branch from Marek Szyprowski: "Short summary for the whole series: A few limitations have been identified in the current dma-mapping design and its implementations for various architectures. There exist more than one function for allocating and freeing the buffers: currently these 3 are used dma_{alloc, free}_coherent, dma_{alloc,free}_writecombine, dma_{alloc,free}_noncoherent. For most of the systems these calls are almost equivalent and can be interchanged. For others, especially the truly non-coherent ones (like ARM), the difference can be easily noticed in overall driver performance. Sadly not all architectures provide implementations for all of them, so the drivers might need to be adapted and cannot be easily shared between different architectures. The provided patches unify all these functions and hide the differences under the already existing dma attributes concept. The thread with more references is available here: http://www.spinics.net/lists/linux-sh/msg09777.html These patches are also a prerequisite for unifying DMA-mapping implementation on ARM architecture with the common one provided by dma_map_ops structure and extending it with IOMMU support. More information is available in the following thread: http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819 More works on dma-mapping framework are planned, especially in the area of buffer sharing and managing the shared mappings (together with the recently introduced dma_buf interface: commit d15bd7ee445d "dma-buf: Introduce dma buffer sharing mechanism"). The patches in the current set introduce a new alloc/free methods (with support for memory attributes) in dma_map_ops structure, which will later replace dma_alloc_coherent and dma_alloc_writecombine functions." People finally started piping up with support for merging this, so I'm merging it as the last of the pending stuff from the merge window. Looks like pohmelfs is going to wait for 3.5 and more external support for merging. * 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: common: DMA-mapping: add NON-CONSISTENT attribute common: DMA-mapping: add WRITE_COMBINE attribute common: dma-mapping: introduce mmap method common: dma-mapping: remove old alloc_coherent and free_coherent methods Hexagon: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes X86 & IA64: adapt for dma_map_ops changes common: dma-mapping: introduce generic alloc() and free() methods
| * common: dma-mapping: introduce mmap methodMarek Szyprowski2012-03-281-0/+3
| | | | | | | | | | | | | | | | | | | | | | Introduce new generic mmap method with attributes argument. This method lets drivers to create a userspace mapping for a DMA buffer in generic, architecture independent way. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
| * common: dma-mapping: remove old alloc_coherent and free_coherent methodsMarek Szyprowski2012-03-281-4/+0
| | | | | | | | | | | | | | | | | | Remove old, unused alloc_coherent and free_coherent methods from dma_map_ops structure. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
| * common: dma-mapping: introduce generic alloc() and free() methodsMarek Szyprowski2012-03-281-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new generic alloc and free methods with attributes argument. Existing alloc_coherent and free_coherent can be implemented on top of the new calls with NULL attributes argument. Later also dma_alloc_non_coherent can be implemented using DMA_ATTR_NONCOHERENT attribute as well as dma_alloc_writecombine with separate DMA_ATTR_WRITECOMBINE attribute. This way the drivers will get more generic, platform independent way of allocating dma buffers with specific parameters. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: David Gibson <david@gibson.dropbear.ud.au> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
* | ARM: dma-mapping: convert ARCH_HAS_DMA_SET_COHERENT_MASK to kconfig symbolRob Herring2012-03-251-1/+1
|/ | | | | | | | | | | | | | | | | | | | The only users of ARCH_HAS_DMA_SET_COHERENT_MASK are 2 ARM platforms: ixp4xx and pxa cm_x2xx. We've been getting lucky that the define is implicitly included before dma-mapping.h, but the removal of io.h broke things (c334bc1 ARM: make mach/io.h include optional). Since memory.h is the correct place, but no longer exists, convert the define to a kconfig entry. Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Nicolas Pitre <nico@linaro.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Imre Kaloz <kaloz@openwrt.org> Cc: Krzysztof Halasa <khc@pm.waw.pl> Cc: Eric Miao <eric.y.miao@gmail.com> Acked-by: Haojian Zhuang <haojian.zhuang@marvell.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com>
* Merge branch 'next' of ↵Linus Torvalds2011-11-061-0/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (106 commits) powerpc/p3060qds: Add support for P3060QDS board powerpc/83xx: Add shutdown request support to MCU handling on MPC8349 MITX powerpc/85xx: Make kexec to interate over online cpus powerpc/fsl_booke: Fix comment in head_fsl_booke.S powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver powerpc/85xx: Add 'fsl,pq3-gpio' compatiable for GPIO driver powerpc/86xx: Correct Gianfar support for GE boards powerpc/cpm: Clear muram before it is in use. drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager powerpc/fsl_msi: add support for "msi-address-64" property powerpc/85xx: Setup secondary cores PIR with hard SMP id powerpc/fsl-booke: Fix settlbcam for 64-bit powerpc/85xx: Adding DCSR node to dtsi device trees powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards powerpc/85xx: fix PHYS_64BIT selection for P1022DS powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map powerpc: respect mem= setting for early memory limit setup powerpc: Update corenet64_smp_defconfig powerpc: Update mpc85xx/corenet 32-bit defconfigs ... Fix up trivial conflicts in: - arch/powerpc/configs/40x/hcu4_defconfig removed stale file, edited elsewhere - arch/powerpc/include/asm/udbg.h, arch/powerpc/kernel/udbg.c: added opal and gelic drivers vs added ePAPR driver - drivers/tty/serial/8250.c moved UPIO_TSI to powerpc vs removed UPIO_DWAPB support
| * dma-mapping: Add get_required_mask if arch overrides defaultMilton Miller2011-09-201-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an architecture sets ARCH_HAS_DMA_GET_REQUIRED_MASK and has settable dma_map_ops, the required mask may change by the ops implementation. For example, a system that always has an mmu inline may only require 32 bits while a swiotlb would desire bits to cover all of memory. Therefore add the field if the architecture does not use the generic definition of dma_get_required_mask. The first use will by by powerpc. Note that this does add some dependency on the order in which files are visible here. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
* | include/linux/dma-mapping.h: add dma_zalloc_coherent()Andrew Morton2011-11-021-0/+10
|/ | | | | | | | | Lots of driver code does a dma_alloc_coherent() and then zeroes out the memory with a memset. Make it easy for them. Cc: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include/linux/dma-mapping.h: remove DMA_xxBIT_MASK macrosWANG Cong2011-07-261-21/+0
| | | | | | | | | | | git grep shows there are no users in tree, so we can remove them safely. Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* net: remove mm.h inclusion from netdevice.hAlexey Dobriyan2011-06-211-9/+1
| | | | | | | | | | | | | | | | | Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually). To prevent mm.h inclusion via other channels also extract "enum dma_data_direction" definition into separate header. This tiny piece is what gluing netdevice.h with mm.h via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h". Removal of mm.h from scatterlist.h was tried and was found not feasible on most archs, so the link was cutoff earlier. Hope people are OK with tiny include file. Note, that mm_types.h is still dragged in, but it is a separate story. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* arm: fix "arm: fix pci_set_consistent_dma_mask for dmabounce devices"FUJITA Tomonori2010-09-221-0/+4
| | | | | | | | | | | | | | | | | | | This fixes the regression caused by the commit 6fee48cd330c68 ("dma-mapping: arm: use generic pci_set_dma_mask and pci_set_consistent_dma_mask"). ARM needs to clip the dma coherent mask for dmabounce devices. This restores the old trick. Note that strictly speaking, the DMA API doesn't allow architectures to do such but I'm not sure it's worth adding the new API to set the dma mask that allows architectures to clip it. Reported-by: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: fix build errors on !HAS_DMA architecturesHeiko Carstens2010-08-131-0/+2
| | | | | | | | | | | | | | | | commit 4565f0170dfc849b3629c27d769db800467baa62 "dma-mapping: unify dma_get_cache_alignment implementations" causes build errors on !HAS_DMA architectures/platforms like s390 and sun3: include/linux/dma-mapping.h:145: error: static declaration of 'dma_get_cache_alignment' follows non-static declaration include/asm-generic/dma-mapping-broken.h:73: error: previous declaration of 'dma_get_cache_alignment' was here Fix this by adding an explicit ifdef. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: unify dma_get_cache_alignment implementationsFUJITA Tomonori2010-08-111-0/+8
| | | | | | | | | | | | | | | | dma_get_cache_alignment returns the minimum DMA alignment. Architectures defines it as ARCH_DMA_MINALIGN (formally ARCH_KMALLOC_MINALIGN). So we can unify dma_get_cache_alignment implementations. Note that some architectures implement dma_get_cache_alignment wrongly. dma_get_cache_alignment() should return the minimum DMA alignment. So fully-coherent architectures should return 1. This patch also fixes this issue. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: remove deprecated dma_sync_single and dma_sync_sg APIFUJITA Tomonori2010-05-271-15/+0
| | | | | | | | | | | Since 2.6.5, it had been commented, 'for backwards compatibility, removed in 2.7.x'. Since 2.6.31, it have been marked as __deprecated. I think that we can remove the API safely now. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: remove unnecessary sync_single_range_* in dma_map_opsFUJITA Tomonori2010-05-271-10/+0
| | | | | | | | | | | sync_single_range_for_cpu and sync_single_range_for_device hooks are unnecessary because sync_single_for_cpu and sync_single_for_device can be used instead. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: dma-mapping.h: add dma_set_coherent_maskFUJITA Tomonori2010-03-121-0/+8
| | | | | | | | | | | | | | | | | | | | | dma_set_coherent_mask corresponds to pci_set_consistent_dma_mask. This is necessary to move to the generic device model DMA API from the PCI bus specific API in the long term. dma_set_coherent_mask works in the exact same way that pci_set_consistent_dma_mask does. So this patch also changes pci_set_consistent_dma_mask to call dma_set_coherent_mask. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@suse.de> Cc: David S. Miller <davem@davemloft.net> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping.h: add the dma_unmap state APIFUJITA Tomonori2010-03-121-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | Adds the following macros: DECLARE_DMA_UNMAP_ADDR(ADDR_NAME) DECLARE_DMA_UNMAP_LEN(LEN_NAME) dma_unmap_addr(PTR, ADDR_NAME) dma_unmap_addr_set(PTR, ADDR_NAME, VAL) dma_unmap_len(PTR, LEN_NAME) dma_unmap_len_set(PTR, LEN_NAME, VAL) The API corresponds to the pci_unmap state API. We'll move to this new generic API from the PCI specific API in the long term. As include/asm-generic/pci-dma-compat.h does, the pci_unmap API simply calls the new generic API for some time. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@suse.de> Cc: David S. Miller <davem@davemloft.net> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma: Add set_dma_mask hook to struct dma_map_opsFUJITA Tomonori2009-08-281-0/+1
| | | | | | | | POWERPC needs this hook. SPARC could use it too. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* remove is_buffer_dma_capable()FUJITA Tomonori2009-07-281-5/+0
| | | | | | | | | | | is_buffer_dma_capable() was replaced with dma_capable(). is_buffer_dma_capable() tells if a buffer is dma-capable or not. However, it doesn't take a pointer to struct device so it doesn't work for POWERPC. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
* dma-mapping: mark dma_sync_single and dma_sync_sg as deprecatedFUJITA Tomonori2009-06-191-3/+14
| | | | | | | | | | | | | | | dma_sync_single() and dma_sync_sg() have been described as "Backwards compat, remove in 2.7.x" for a long time (since 2.6.5). This marks dma_sync_single() and dma_sync_sg() as deprecated so the users get notified before removing them. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Ingo Molnar <mingo@elte.hu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: mark DMA_nBITS_MASK as deprecatedJiri Slaby2009-06-191-12/+14
| | | | | | | | | | | | Mark them deprecated so that out-of-tree developers get notified about this before their modules break when these macros are removed. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Yang Hongyang <yanghy@cn.fujitsu.com> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)Yang Hongyang2009-04-071-1/+1
| | | | | | | | Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* generic: add common struct for dma map operationsFUJITA Tomonori2009-01-061-0/+48
| | | | | | | | This adds struct dma_map_ops include/linux/dma-mapping.h, which, is used to handle multiple sets of dma mapping API. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* convert swiotlb to use dma_get_maskFUJITA Tomonori2008-09-191-1/+1
| | | | | | | | swiotlb can use dma_get_mask() instead of the homegrown function. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: tony.luck@intel.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
* iommu: add dma_get_mask helper functionFUJITA Tomonori2008-09-141-0/+7
| | | | | | | | Several IOMMUs do the same thing to get the dma_mask of a device. This adds a helper function to do the same thing to sweep them. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* add is_buffer_dma_capable helper functionFUJITA Tomonori2008-09-101-0/+5
| | | | | | | | | | | is_buffer_dma_capable helper function is to see if a memory region is DMA-capable or not. The arugments are the dma_mask (or coherent_dma_mask) of a device and the address and size of a memory region. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* dma: add dma_*map*_attrs() interfacesArthur Kepner2008-04-291-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | Introduce new interfaces, dma_*map*_attrs(), for passing architecture-specific attributes when memory is mapped and unmapped for DMA. Give the interfaces default implementations which ignore attributes. Also introduce the dma_{set|get}_attr() interfaces for setting and retrieving individual attributes. Define one attribute, DMA_ATTR_WRITE_BARRIER, in anticipation of its use by ia64/sn. Select whether architectures implement arch-specific versions of the dma_*map*_attrs() interfaces via HAVE_DMA_ATTRS in Kconfig. [markn@au1.ibm.com: dma_{set,get}_attr() have to be static inline] Signed-off-by: Arthur Kepner <akepner@sgi.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Jes Sorensen <jes@sgi.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Roland Dreier <rdreier@cisco.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Mark Nelson <markn@au1.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* iommu sg merging: add accessors for segment_boundary_mask in ↵FUJITA Tomonori2008-02-051-0/+15
| | | | | | | | | | | | | | | | | | | | device_dma_parameters() This adds new accessors for segment_boundary_mask in device_dma_parameters structure in the same way I did for max_segment_size. So we can easily change where to place struct device_dma_parameters in the future. dma_get_segment boundary returns 0xffffffff if dma_parms in struct device isn't set up properly. 0xffffffff is the default value used in the block layer and the scsi mid layer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Greg KH <greg@kroah.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* iommu sg merging: add device_dma_parameters structureFUJITA Tomonori2008-02-051-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IOMMUs merges scatter/gather segments without considering a low level driver's restrictions. The problem is that IOMMUs can't access to the limitations because they are in request_queue. This patchset introduces a new structure, device_dma_parameters, including dma information. A pointer to device_dma_parameters is added to struct device. The bus specific structures (like pci_dev) includes device_dma_parameters. Low level drivers can use dma_set_max_seg_size to tell IOMMUs about the restrictions. We can move more dma stuff in struct device (like dma_mask) to struct device_dma_parameters later (needs some cleanups before that). This includes patches for all the IOMMUs that could merge sg (x86_64, ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was tested. The patches for other IOMMUs are only compile tested. This patch: Add a new structure, device_dma_parameters, including dma information. A pointer to device_dma_parameters is added to struct device. - there are only max_segment_size and segment_boundary_mask there but we'll move more dma stuff in struct device (like dma_mask) to struct device_dma_parameters later. segment_boundary_mask is not supported yet. - new accessors for the dma parameters are added. So we can easily change where to place struct device_dma_parameters in the future. - dma_get_max_seg_size returns 64K if dma_parms in struct device isn't set up properly. 64K is the default max_segment_size in the block layer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* linux/dma-mapping.h: rename macro to prevent multiple inclusionRobert P. J. Day2008-02-031-2/+2
| | | | | | | | | Having the macro to prevent multiple inclusion of include/linux/dma-mapping.h contain the prefix "_ASM" is just begging for possible confusion some day. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* stop using DMA_xxBIT_MASKAndrew Morton2007-10-181-2/+8
| | | | | | | | Now that we have DMA_BIT_MASK(), these macros are pointless. Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* unify DMA_..BIT_MASK definitions: v3.1Borislav Petkov2007-10-181-10/+14
| | | | | | | | | | | | | | | | Remove redundant DMA_..BIT_MASK definitions across two drivers. The computation of the majority of the bitmasks is done by the compiler. The initial split of the patch touching each a different file got removed due to possible git bisect breakage. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Reviewed-by: Satyam Sharma <satyam@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* introduce DMA_MASK_NONE as a signal for unable to do DMAJames Bottomley2007-10-161-0/+7
| | | | | | | | | | | | | | | | | Some devices are incapable of DMA and need to be recognised as such. Introduce a NONE dma mask to facilitate this plus an inline function: is_device_dma_capable() to check this. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Tejun Heo <htejun@gmail.com> Cc: Natalie Protasevich <protasnb@gmail.com> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma-mapping: prevent dma dependent code from linking on !HAS_DMA archsDan Williams2007-07-161-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | Continuing the work started in 411f0f3edc141a582190d3605cadd1d993abb6df ... This enables code with a dma path, that compiles away, to build without requiring additional code factoring. It also prevents code that calls dma_alloc_coherent and dma_free_coherent from linking whereas previously the code would hit a BUG() at run time. Finally, it allows archs that set !HAS_DMA to delete their asm/dma-mapping.h file. Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: John W. Linville <linville@tuxdriver.com> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: James Bottomley <James.Bottomley@SteelEye.com> Cc: Tejun Heo <htejun@gmail.com> Cc: Jeff Garzik <jeff@garzik.org> Cc: <geert@linux-m68k.org> Cc: <zippel@linux-m68k.org> Cc: <spyro@f2s.com> Cc: <ysato@users.sourceforge.jp> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* devres: device resource managementTejun Heo2007-02-091-1/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] Move valid_dma_direction() from x86_64 to generic codeRolf Eike Beer2006-09-291-0/+7
| | | | | | | | | | | As suggested by Muli Ben-Yehuda this function is moved to generic code as may be useful for all archs. [akpm@osdl.org: fix] Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* dl2k: use DMA_48BIT_MASK constantFrancois Romieu2006-05-101-0/+1
| | | | | | | Typo will be harder with this one. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
* [PATCH] Last DMA_xBIT_MASK cleanupsTobias Klauser2006-04-111-1/+1
| | | | | | | | | | These are the last conversions of pci_set_dma_mask(), pci_set_consistent_dma_mask() and pci_dma_supported() to use DMA_xBIT_MASK constants from linux/dma-mapping.h Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Replace 0xff.. with correct DMA_xBIT_MASKMatthias Gehre2006-03-281-0/+1
| | | | | | | | | | Replace all occurences of 0xff.. in calls to function pci_set_dma_mask() and pci_set_consistant_dma_mask() with the corresponding DMA_xBIT_MASK from linux/dma-mapping.h. Signed-off-by: Matthias Gehre <M.Gehre@gmx.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Intruduce DMA_28BIT_MASKTobias Klauser2006-03-221-0/+1
| | | | | | | | | This patch introduces the DMA_28BIT_MASK constant in dma-mapping.h ALSA drivers using this mask are changed to use the new constant. Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Acked-by: Takashi Iwai <tiwai@suse.de> Acked-by: Jaroslav Kysela <perex@suse.cz>
* [SCSI] Add DMA mask constants other than 32 and 64 bitLee Revell2005-06-171-0/+5
| | | | | Signed-Off-By: Lee Revell <rlrevell@joe-job.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* Linux-2.6.12-rc2Linus Torvalds2005-04-161-0/+56
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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