- 05 7月, 2013 6 次提交
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由 Elen Song 提交于
In one dma transfer, the data transfer width can be configured and it is limited by source or destination peripheral width, tx_width will save the transfer width, but for memcpy, either source or destination transfer width is taken as tx_width. Signed-off-by: NElen Song <elen.song@atmel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Nicolas Ferre 提交于
No modification in CFG register configuration, just rearrange bits directives to group logically and make it more readable. Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Nicolas Ferre 提交于
Peripheral handshaking identification numbers can be bigger than 15, so new fields have been created in the CFG register. Add macros to take this modification into account and use them in at_dma_xlate() function. Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Nicolas Ferre 提交于
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Markus Pargmann 提交于
imxdma->dev is used for dev_warn before it was set. Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de> Reviewed-by: NShawn Guo <shawn.guo@linaro.org> Acked-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Markus Pargmann 提交于
Adding devicetree support for imx-dma driver. Use driver name for function 'imx_dma_is_general_purpose' because the devicename for devicetree initialized devices is different. Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de> Reviewed-by: NArnd Bergmann <arnd@arndb.de> Reviewed-by: NShawn Guo <shawn.guo@linaro.org> Acked-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 12 6月, 2013 2 次提交
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由 Lars-Peter Clausen 提交于
Both of_dma_nbcells field of the of_dma_controller and the args_count field of the dma_spec are initialized by parsing the #dma-cells attribute of their device tree node. So if the device tree nodes of a DMA controller and the dma_spec match this means that of_dma_nbcells and args_count will also match. So the second test in the of_dma_find_controller loop is redundant because given the first test yields true the second test will also yield true. So we can safely remove the test whether of_dma_nbcells matches args_count. Since this was the last user of the of_dma_nbcells field we can remove it altogether. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Lars-Peter Clausen 提交于
There is no sensible reason why #dma-cells shouldn't be allowed to be 0. It is completely up to the DMA controller how many additional parameters, besides the phandle, it needs to identify a channel. E.g. for DMA controller with only one channel or for DMA controllers which don't have a restriction on which channel can be used for which peripheral it completely legitimate to not require any additional parameters. Also fixes the following warning: drivers/dma/of-dma.c: In function 'of_dma_controller_register': drivers/dma/of-dma.c:67:7: warning: 'nbcells' may be used uninitialized in this function Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 08 6月, 2013 1 次提交
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由 Andy Shevchenko 提交于
When user interrupts ongoing transfers the dmatest may end up with console lockup, oops, or data mismatch. This patch prevents user to abort any ongoing test. Documentation is updated accordingly. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Reported-by: NWill Deacon <will.deacon@arm.com> Tested-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 27 5月, 2013 1 次提交
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由 Rabin Vincent 提交于
The pm runtime reference counting of the driver is broken for the case when there is more than one transfer queued, leading to the device being runtime suspend while active. Fix it. Signed-off-by: NRabin Vincent <rabin.vincent@stericsson.com> Acked-by: NLinus Walleij <linus.walleij@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 18 5月, 2013 1 次提交
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由 Wolfram Sang 提交于
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: NWolfram Sang <wsa@the-dreams.de> Acked-by: NStephen Warren <swarren@nvidia.com>
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- 14 5月, 2013 1 次提交
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由 Andy Shevchenko 提交于
Since we have CSRT only to get additional DMA controller resources, let's get rid of drivers/acpi/csrt.c and move its logic inside ACPI DMA helpers code. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 03 5月, 2013 3 次提交
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由 Laxman Dewangan 提交于
Implement suspend/resume callbacks to store APB DMA channel's register on suspend and restore APB DMA channel's register on resume. Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Lars-Peter Clausen 提交于
Currently the OF DMA code uses a spin lock to protect the of_dma_list from concurrent access and a per controller reference count to protect the controller from being freed while a request operation is in progress. If of_dma_controller_free() is called for a controller who's reference count is not zero it will return -EBUSY and not remove the controller. This is fine up until here, but leaves the question what the caller of of_dma_controller_free() is supposed to do if the controller couldn't be freed. The only viable solution for the caller is to spin on of_dma_controller_free() until it returns success. E.g. do { ret = of_dma_controller_free(dev->of_node) } while (ret != -EBUSY); This is rather ugly and unnecessary and none of the current users of of_dma_controller_free() check it's return value anyway. Instead protect the list by a mutex. The mutex will be held as long as a request operation is in progress. So if of_dma_controller_free() is called while a request operation is in progress it will be put to sleep and only wake up once the request operation has finished. This means that it is no longer possible to register or unregister OF DMA controllers from a context where it's not possible to sleep. But I doubt that we'll ever need this. Also rename of_dma_get_controller back to of_dma_find_controller. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Lars-Peter Clausen 提交于
of_dma_request_slave_channel() currently does not drop the reference to the dma_spec of_node if no DMA controller matching the of_node could be found. This patch fixes it by always calling of_node_put(). Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Acked-by: NArnd Bergmann <arnd@arndb.de> Reviewed-by: NJon Hunter <jon-hunter@ti.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 02 5月, 2013 1 次提交
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由 Barry Song 提交于
if we initilize dma driver by module_init, there are still many devices which will be initilized earlier than dma. these devices will fail to get dma channel. this moves dmaengine earlier than device_initcall and make dma available for all devices. Reported-by: NRenwei Wu <Renwei.Wu@csr.com> Signed-off-by: NBarry Song <Baohua.Song@csr.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 30 4月, 2013 3 次提交
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由 Shimoda, Yoshihiro 提交于
Some Renesas USB modules have SUDMAC. This patch supports it using the shdma-base driver. Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Shimoda, Yoshihiro 提交于
This patch adds Kconfig in the drivers/dma/sh. This patch also adds a new config "SH_DMAE_BASE" and the "config SH_DMAE" depends on it. Since some drivers (e.g. sh_mmcif.c) depends on shdma-base.c if CONFIG_DMA_ENGINE=y, the "config SH_DMAE_BASE" is set as "bool". Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Ludovic Desroches 提交于
Update at_hdmac driver to support generic DMA device tree binding. Devices can still request channel with dma_request_channel() then it doesn't break DMA for non DT boards. Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com> Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 18 4月, 2013 1 次提交
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由 Ludovic Desroches 提交于
The BUG_ON() directive is triggered probably due to a latency modification following inclusion of commit c10d7367 ("softirq: reduce latencies"). This condition has not been met before 3.9-rc1 and doesn't trigger without this patch. We now make sure that DMA channel is idle before calling atc_complete_all() which makes the BUG_ON() "protection" useless. Signed-off-by: NLudovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NVinod Koul <vinod.koul@intel.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 16 4月, 2013 8 次提交
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由 Fengguang Wu 提交于
Reported-by: NFengguang Wu <fengguang.wu@intel.com> Signed-off-by: NFengguang Wu <fengguang.wu@intel.com> Acked-by: NDave Jiang <dave.jiang@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
v3.3 provides support for write back descriptor error status. This allows reporting of errors in a descriptor field. In supporting this, certain errors such as P/Q validation errors no longer halts the channel. The DMA engine can continue to execute until the end of the chain and allow software to report the "errors" up the stack. We are also going to mask those error interrupts and handle them when the "chain" has completed at the end. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
This workaround checks for channel 2&3 and remove RAID cap. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
v3.3 introduced 16 sources PQ operations. This also introduced super extended descriptors to support the 16 srcs operations. This patch adds support for the 16 sources ops and in turn adds the super extended descriptors for those ops. 5 SED pools are created depending on the descriptor sizes. An SED can be a 64 bytes sized descriptor or larger and must be physically contiguous. A kmem cache pool is created for allocating the software descriptor that manages the hardware descriptor. The super extended descriptor will take place of extended descriptor under certain operations and be "attached" to the op descriptor during operation. This is a new feature for ioatdma v3.3. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
CB3.2 and earlier hardware has silicon bugs that are no longer needed with the new hardware. We don't have to use a NULL op to signal interrupt for RAID ops any longer. This code make sure the legacy workarounds only happen on legacy hardware. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
Since we have proper ACPI DMA helpers implemented, the driver may use it. This patch introduces custom filter function together with acpi_device_id table. Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
The slave device could be enumerated by ACPI. In that case the dma_request_slave_channel should use the acpi_dma_request_slave_channel() helper. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
There is a new generic API to get a DMA channel for a slave device (commit 9a6cecc8 "dmaengine: add helper function to request a slave DMA channel"). In similar fashion to the DT case (commit aa3da644 "of: Add generic device tree DMA helpers") we introduce helpers to the DMAC drivers which are enumerated by ACPI. The proposed extension provides the following API calls: acpi_dma_controller_register(), devm_acpi_dma_controller_register() acpi_dma_controller_free(), devm_acpi_dma_controller_free() acpi_dma_simple_xlate() acpi_dma_request_slave_chan_by_index() acpi_dma_request_slave_chan_by_name() The first two should be used, for example, at probe() and remove() of the corresponding DMAC driver. At the register stage the DMAC driver supplies a custom xlate() function to translate a struct dma_spec into struct dma_chan. Accordingly to the ACPI Fixed DMA resource specification the only two pieces of information the slave device has are the channel id and the request line (slave id). Those two are represented by struct dma_spec. The acpi_dma_request_slave_chan_by_index() provides access to the specifix FixedDMA resource by its index. Whereas dma_request_slave_channel() takes a string parameter to identify the DMA resources required by the slave device. To make a slave device driver work with both DeviceTree and ACPI enumeration a simple convention is established: "tx" corresponds to the index 0 and "rx" to the index 1. In case of robust configuration the slave device driver unfortunately needs to call acpi_dma_request_slave_chan_by_index() directly. Additionally the patch provides "managed" version of the register/free pair i.e. devm_acpi_dma_controller_register() and devm_acpi_dma_controller_free(). Usually, the driver uses only devm_acpi_dma_controller_register(). Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 15 4月, 2013 12 次提交
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由 Lars-Peter Clausen 提交于
list_for_each_entry is able to handle empty lists just fine, there is no need to make sure that the list is non empty. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Viresh Kumar 提交于
In of_dma_controller_register() routine we are calling of_get_property() as an parameter to be32_to_cpup(). In case the property doesn't exist we will get a crash. This patch changes this code to check if we got a valid property first and then runs be32_to_cpup() on it. Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Markus Pargmann 提交于
No DMA of-function alters the name, so this patch changes the name arguments to be constant. Most drivers will probably request DMA channels using a constant name. Signed-off-by: NMarkus Pargmann <mpa@pengutronix.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
The alignment workaround is only necessary for cb3.2 or earlier platforms. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
The PQ Val ops work on the newer hardware so we should actually provide support for it and remove the disabling bits. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
Make it so only 3.2 and earlier platform need the PCI config register clearings since this implementation does not have the registers. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
The Intel Atom S1200 family ioatdma changed the channel reset behavior. It does a reset similar to PCI FLR by resetting all the MSIX registers. We have to re-init msix interrupts because of this. This workaround is only specific to this platform and is not expected to carry over to the later generations. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
The channel status register for v3.3 is now 64bit. Use readq if available on v3.3 platforms. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
These should be good for the IOAT DMA devices on the Intel Atom S1269, S1279, and S1289 platforms. We are also adding IOAT v3.3 definition for the new DMA engine. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Dave Jiang 提交于
Adding Haswell PCI device IDs for ioatdma and simplify the detection of certain Xeon CPUs that has alignment bugs so that modifications can be changed at a single place going forward. Signed-off-by: NDave Jiang <dave.jiang@intel.com> Acked-by: NDan Williams <djbw@fb.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Jon Hunter 提交于
If the device-tree blob is present during boot, then register the SDMA controller with the device-tree DMA driver so that we can use device-tree to look-up DMA client information. Signed-off-by: NJon Hunter <jon-hunter@ti.com> Reviewed-by: NFelipe Balbi <balbi@ti.com> Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: NSantosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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由 Andy Shevchenko 提交于
If CONFIG_OF is not set the of_node of the device will always be NULL. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: NViresh Kumar <viresh.kumar@linaro.org> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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