- 23 Dec, 2014 6 commits
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Jürg Billeter authored
If the atomic DMA coherent pool is too small, disable use of hardware descriptor lists instead of crashing the system: ERROR: 256 KiB atomic DMA coherent pool is too small! Please increase it with coherent_pool= kernel parameter! Unable to handle kernel NULL pointer dereference at virtual address 00000004 Internal error: Oops: a07 [#1] PREEMPT SMP ARM PC is at rcar_dmac_chan_reinit+0x3c/0x160 LR is at _raw_spin_lock_irqsave+0x18/0x5c [<802132c0>] (rcar_dmac_chan_reinit) from [<80214818>] (rcar_dmac_isr_error+0x84/0xa0) [<80214818>] (rcar_dmac_isr_error) from [<80060484>] (handle_irq_event_percpu+0x50/0x150) [<80060484>] (handle_irq_event_percpu) from [<800605c0>] (handle_irq_event+0x3c/0x5c) [<800605c0>] (handle_irq_event) from [<8006350c>] (handle_fasteoi_irq+0xb8/0x198) [<8006350c>] (handle_fasteoi_irq) from [<8005fdb0>] (generic_handle_irq+0x20/0x30) [<8005fdb0>] (generic_handle_irq) from [<8000fcd0>] (handle_IRQ+0x50/0xc4) [<8000fcd0>] (handle_IRQ) from [<800092cc>] (gic_handle_irq+0x28/0x5c) [<800092cc>] (gic_handle_irq) from [<80012700>] (__irq_svc+0x40/0x70) Kernel panic - not syncing: Fatal exception in interrupt Signed-off-by:
Jürg Billeter <j@bitron.ch> Signed-off-by:
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
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Laurent Pinchart authored
Unlike DMA transfers descriptors that are preallocated and cached, memory used to store hardware descriptors is allocated and freed with the DMA coherent allocation API for every transfer. Besides degrading performances, this creates a CMA stress test that seems to cause issues. Running dmatest with the noverify option produces [ 50.066539] alloc_contig_range test_pages_isolated(6b845, 6b846) failed [ 50.235180] alloc_contig_range test_pages_isolated(6b848, 6b84e) failed [ 52.964584] alloc_contig_range test_pages_isolated(6b847, 6b848) failed [ 54.127113] alloc_contig_range test_pages_isolated(6b843, 6b844) failed [ 56.270253] alloc_contig_range test_pages_isolated(6b84c, 6b850) failed The root cause needs to be fixed, but in the meantime, as a workaround and a performance improvement, cache hardware descriptors. Signed-off-by:
Wolfram Sang <wsa+renesas@sang-engineering.com>
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Laurent Pinchart authored
The DMAC supports hardware-based auto-configuration from descriptor lists. This reduces the number of interrupts required for processing a DMA transfer. Support that mode in the driver. Signed-off-by:
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Laurent Pinchart authored
The DMAC is a general purpose multi-channel DMA controller that supports both slave and memcpy transfers. The driver currently supports the DMAC found in the r8a7790 and r8a7791 SoCs. Support for compatible DMA controllers (such as the audio DMAC) will be added later. Feature-wise, automatic hardware handling of descriptors chains isn't supported yet. LPAE support is implemented. Signed-off-by:
Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Tested-by:
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Laurent Pinchart authored
DT bindings are complex enough without expressing the same information twice in a slightly different way. Remove the duplicate. Reported-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
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Laurent Pinchart authored
The widths are missing, add them. Signed-off-by:
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- 22 Dec, 2014 34 commits
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Vinod Koul authored
driver comment refers to DMA_PAUSE which needs to be updated to .device_pause Signed-off-by:Vinod Koul <vinod.koul@intel.com>
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Vinod Koul authored
driver comment refers to DMA_SLAVE_CONFIG which needs to be updated to .device_config Signed-off-by: -
Vinod Koul authored
driver comment refers to DMA_SLAVE_CONFIG which needs to be updated to .device_config Signed-off-by: -
Vinod Koul authored
driver comment refers to DMA_SLAVE_CONFIG which needs to be updated to .device_config Signed-off-by: -
Vinod Koul authored
drivers/dma/tegra20-apb-dma.c:1428:37: warning: assignment from incompatible pointer type [enabled by default] drivers/dma/ste_dma40.c: In function 'd40_terminate_all': The function prototype expects return type 'int' whereas these where void Signed-off-by: -
Vinod Koul authored
drivers/dma/ste_dma40.c:2627:3: warning: 'return' with a value, in function returning void [enabled by default] drivers/dma/ste_dma40.c: In function 'd40_ops_init': drivers/dma/ste_dma40.c:2869:28: warning: assignment from incompatible pointer type [enabled by default] The function prototype expects return type 'int' whereas these where void Signed-off-by: -
Vinod Koul authored
drivers/dma/mxs-dma.c: In function 'mxs_dma_terminate_all': drivers/dma/mxs-dma.c:662:23: warning: unused variable 'mxs_chan'[-Wunused-variable] Signed-off-by: -
Vinod Koul authored
drivers/dma/mxs-dma.c: In function 'mxs_dma_probe': drivers/dma/mxs-dma.c:848:35: warning: assignment from incompatible pointer type [enabled by default] drivers/dma/mxs-dma.c:849:36: warning: assignment from incompatible pointer type [enabled by default] The function prototype expects return type 'int' whereas these where void Signed-off-by: -
Vinod Koul authored
dma_slave_config is expected to be set for slave operations Only, not for memcpy ones Signed-off-by: -
Vinod Koul authored
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Vinod Koul authored
mxs_dma_reset_chan() expects struct dma_chan * as argument but we were providing struct dma_chan, so fix this Signed-off-by: -
Maxime Ripard authored
Now that we have splitted device_control and removed device_slave_caps in favor of a few dma_device variables, update the documentation accordingly. Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Maxime Ripard authored
Now that device_control has been split into several functions, and device_slave_caps rendered useless, we can safely remove them. Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
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Maxime Ripard authored
For the slave caps retrieval to be really useful, most drivers need to implement it. Hence, we need to be slightly more aggressive, and trigger a warning at registration time for drivers that don't fill their caps infos in order to encourage them to implement it. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
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Maxime Ripard authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
Stephen Warren <swarren@wwwdotorg.org> Signed-off-by:
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Ludovic Desroches authored
Now that the generic slave caps code can make use of the device assigned capabilities, instead of relying on a callback to be implemented. Make use of this code. Signed-off-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by:
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Maxime Ripard authored
Rename the device_control callback of the TXX9 DMA driver to terminate_all since it's all it's really doing. That will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Rename the device_control callback of the TXX9 DMA driver to terminate_all since it's all it's really doing. That will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Rename the device_control callback of the Timberdal DMA driver to terminate_all since it's all it's really doing. That will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Rename the device_control callback of the Intel PCH DMA driver to terminate_all since it's all it's really doing. That will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
The Marvell XOR engine doesn't allow any operations that use to be defined in device_control, it shouldn't need to be defined. Since it's going to be deprecated, remove it altogether. Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the Xilinx VDMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the NVidia Tegra20 APB DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the ST-Ericsson DMA 40 driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the Allwinner A31 DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the SiRF Prima 2 DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
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Maxime Ripard authored
Split the device_control callback of the Super-H DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by:
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