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path: root/drivers/dma/mmp_pdma.c
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2013-02-26Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds1-4/+2
Pull slave-dmaengine updates from Vinod Koul: "This is fairly big pull by my standards as I had missed last merge window. So we have the support for device tree for slave-dmaengine, large updates to dw_dmac driver from Andy for reusing on different architectures. Along with this we have fixes on bunch of the drivers" Fix up trivial conflicts, usually due to #include line movement next to each other. * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (111 commits) Revert "ARM: SPEAr13xx: Pass DW DMAC platform data from DT" ARM: dts: pl330: Add #dma-cells for generic dma binding support DMA: PL330: Register the DMA controller with the generic DMA helpers DMA: PL330: Add xlate function DMA: PL330: Add new pl330 filter for DT case. dma: tegra20-apb-dma: remove unnecessary assignment edma: do not waste memory for dma_mask dma: coh901318: set residue only if dma is in progress dma: coh901318: avoid unbalanced locking dmaengine.h: remove redundant else keyword dma: of-dma: protect list write operation by spin_lock dmaengine: ste_dma40: do not remove descriptors for cyclic transfers dma: of-dma.c: fix memory leakage dw_dmac: apply default dma_mask if needed dmaengine: ioat - fix spare sparse complain dmaengine: move drivers/of/dma.c -> drivers/dma/of-dma.c ioatdma: fix race between updating ioat->head and IOAT_COMPLETION_PENDING dw_dmac: add support for Lynxpoint DMA controllers dw_dmac: return proper residue value dw_dmac: fill individual length of descriptor ...
2013-01-25dma: Convert to devm_ioremap_resource()Thierry Reding1-3/+4
Convert all uses of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. devm_ioremap_resource() provides its own error messages so all explicit error messages can be removed from the failure code paths. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-20dma: remove unnecessary null pointer check in mmp_pdma.cCong Ding1-4/+2
the pointer cfg is dereferenced in line 594, so it's no reason to check null again in line 620. Signed-off-by: Cong Ding <dinggnu@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-01-03Drivers: dma: remove __dev* attributes.Greg Kroah-Hartman1-1/+1
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Viresh Kumar <viresh.linux@gmail.com> Cc: Dan Williams <djbw@fb.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Barry Song <baohua.song@csr.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Jassi Brar <jassisinghbrar@gmail.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devinitBill Pemberton1-2/+2
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Li Yang <leoli@freescale.com> Cc: Zhang Wei <zw@zh-kernel.org> Cc: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28dma: remove use of __devexit_pBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Acked-by: Barry Song <baohua.song@csr.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-14dmaengine: mmp-pdma supportZhangfei Gao1-0/+875
1. virtual channel vs. physical channel Virtual channel is managed by dmaengine Physical channel handling resource, such as irq Physical channel is alloced dynamically as descending priority, freed immediately when irq done. The availble highest priority physically channel will alwayes be alloced Issue pending list -> alloc highest dma physically channel available -> dma done -> free physically channel 2. list: running list & pending list submit: desc list -> pending list issue_pending_list: if (IDLE) pending list -> running list; free pending list (RUN) irq: free running list (IDLE) check pendlist -> pending list -> running list; free pending list (RUN) 3. irq: Each list generate one irq, calling callback One list may contain several desc chain, in such case, make sure only the last desc list generate irq. 4. async Submit will add desc chain to pending list, which can be multi-called If multi desc chain is submitted, only the last desc would generate irq -> call back If IDLE, issue_pending_list start pending_list, transforming pendlist to running list If RUN, irq will start pending list 5. test 5.1 pxa3xx_nand on pxa910 5.2 insmod dmatest.ko (threads_per_chan=y) By default drivers/dma/dmatest.c test every channel and test memcpy with 1 threads per channel Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>