linux/drivers/dma/Kconfig

726 lines
20 KiB

dmaengine: pl08x: Add support for Faraday Technology FTDMAC020 After reading the specs for the Faraday Technology FTDMAC020 found in the Gemini platform, it becomes pretty evident that this is just another PL08x derivative, and should be handled like such by simply extending the existing PL08x driver to handle the quirks in this hardware. This patch makes memcpy work and has been tested on the Gemini and also regression-tested on the Nomadik NHK15 using dmatest with 10 threads per channel without a hinch for hours. I have not implemented slave DMA in those codepaths, because this device (Gemini) does not use slave DMA, and it seems like devices using FTDMAC020 for device DMA have a slightly different register layout so some real hardware is needed to proceed with this. I left some FIXME etc in the code for this. I had to do some refactorings of some helper functions, but I have not split those into separate patches because these refactorings do not make much sense without the increased complexity of handling the FTDMAC020. The DMA test would hang the platform on me on the Gemini after a few thousand iterations, however after turning of the caches the problem immediately disappeared and I could run the DMA engine with 10 threads pers physical channel for days in a row without a crash. I think there is no problem with the DMA driver: instead it is something fishy in the FA526 cache handling code that get pretty heavily exercised by the DMA engine and we need to go and fix that instead. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-05-20 23:42:53 +02:00
dmaengine updates for 4.3-rc1 This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Others - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJV5+nSAAoJEHwUBw8lI4NHiXQQAI/++7PmUGZ6BDZGu0B9Bj7U JalNijm43p858nka1zVhDea8pi7Cq3zJdE8EAB7FPQGESvCODWr62oZBr+mSaQ1C oU1RTIRTSiU2HPE4EFeGUvVGrnmTbHR2b1apI1SU41gKn+oQ5RJRRoQwEVwO6uuZ 1VYcUqhurIAZs1FrMIAUa2vg7KTcK9UotfwR2gGBmSvXMf1aJ/dNZC7i/pBJjoyt v6KrLuYjEBAJvY7l368+NhLY/MS+2xdCMQo84B+HNEG7eA7y2MFOcRPXQA3a7dzr NwNuAZcTYDU11r2jiAPcnBM5sPo4bokX6Td0oDbYH6Rn2uIWlof7jGIceUaWLQQq QGZc4QPI4KdjTGNedRN8g9zqv0irFVfDr5v1A+B7N7ehvlubnB4jV8LmLpqN6UQH B38VnDJ3hqdZ6j9RHQTyUoQskSYMPbOAUYbL0qQLkyx8AnLc8TRv7DgtSvZjnz5W oF6So2A5SWZ7UmXKupd6TKtdyG3xtFAh+/MGVQ1RS9bCmnyhaIxJRiJwfftCBTBx IZePOsqlwl2dojM62BDlGS4CLRZve2VgiUEJaPINsdm/On3tQs9+iDbNY3cpvLQS P9u4po1TQPZnKG732vPAxEqdlq709kta7Fj5KIEvNjuWBBGKfypNP8BHKRvTLFlR kcbO03NzwSO6PZpmiUsx =gQZ6 -----END PGP SIGNATURE----- Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine updates from Vinod Koul: "This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Other: - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers" [ The Kconfig and Makefile entries got re-sorted alphabetically, and I handled the conflict with the new Intel integrated IDMA driver by slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in order to keep the Intel entries together. I think it might be a good idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make the sorting be a true sort, not this mismash. Also, this merge disables the COMPILE_TEST for the sun4i DMA controller, because it does not compile cleanly at all. - Linus ] * tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits) dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs dmaengine :ipu: change ipu_irq_handler() to remove compile warning dmaengine: ioatdma: Fix variable array length dmaengine: ioatdma: fix sparse "error" with prep lock dmaengine: hdmac: Add memset capabilities dmaengine: sort the sh Makefile dmaengine: sort the sh Kconfig dmaengine: sort the dw Kconfig dmaengine: sort the Kconfig dmaengine: sort the makefile drivers/dma: make mv_xor.c driver explicitly non-modular dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller devicetree: Add bindings documentation for Analog Devices AXI-DMAC dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests dmaengine: ioatdma: fix coccinelle warning dmaengine: ioatdma: fix zero day warning on incompatible pointer type dmaengine: tegra-apb: Simplify locking for device using global pause dmaengine: tegra-apb: Remove unnecessary return statements and variables dmaengine: tegra-apb: Avoid unnecessary channel base address calculation dmaengine: tegra-apb: Remove unused variables ...
2015-09-04 11:10:18 -07:00
dmaengine updates for 4.3-rc1 This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Others - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJV5+nSAAoJEHwUBw8lI4NHiXQQAI/++7PmUGZ6BDZGu0B9Bj7U JalNijm43p858nka1zVhDea8pi7Cq3zJdE8EAB7FPQGESvCODWr62oZBr+mSaQ1C oU1RTIRTSiU2HPE4EFeGUvVGrnmTbHR2b1apI1SU41gKn+oQ5RJRRoQwEVwO6uuZ 1VYcUqhurIAZs1FrMIAUa2vg7KTcK9UotfwR2gGBmSvXMf1aJ/dNZC7i/pBJjoyt v6KrLuYjEBAJvY7l368+NhLY/MS+2xdCMQo84B+HNEG7eA7y2MFOcRPXQA3a7dzr NwNuAZcTYDU11r2jiAPcnBM5sPo4bokX6Td0oDbYH6Rn2uIWlof7jGIceUaWLQQq QGZc4QPI4KdjTGNedRN8g9zqv0irFVfDr5v1A+B7N7ehvlubnB4jV8LmLpqN6UQH B38VnDJ3hqdZ6j9RHQTyUoQskSYMPbOAUYbL0qQLkyx8AnLc8TRv7DgtSvZjnz5W oF6So2A5SWZ7UmXKupd6TKtdyG3xtFAh+/MGVQ1RS9bCmnyhaIxJRiJwfftCBTBx IZePOsqlwl2dojM62BDlGS4CLRZve2VgiUEJaPINsdm/On3tQs9+iDbNY3cpvLQS P9u4po1TQPZnKG732vPAxEqdlq709kta7Fj5KIEvNjuWBBGKfypNP8BHKRvTLFlR kcbO03NzwSO6PZpmiUsx =gQZ6 -----END PGP SIGNATURE----- Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine updates from Vinod Koul: "This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Other: - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers" [ The Kconfig and Makefile entries got re-sorted alphabetically, and I handled the conflict with the new Intel integrated IDMA driver by slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in order to keep the Intel entries together. I think it might be a good idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make the sorting be a true sort, not this mismash. Also, this merge disables the COMPILE_TEST for the sun4i DMA controller, because it does not compile cleanly at all. - Linus ] * tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits) dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs dmaengine :ipu: change ipu_irq_handler() to remove compile warning dmaengine: ioatdma: Fix variable array length dmaengine: ioatdma: fix sparse "error" with prep lock dmaengine: hdmac: Add memset capabilities dmaengine: sort the sh Makefile dmaengine: sort the sh Kconfig dmaengine: sort the dw Kconfig dmaengine: sort the Kconfig dmaengine: sort the makefile drivers/dma: make mv_xor.c driver explicitly non-modular dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller devicetree: Add bindings documentation for Analog Devices AXI-DMAC dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests dmaengine: ioatdma: fix coccinelle warning dmaengine: ioatdma: fix zero day warning on incompatible pointer type dmaengine: tegra-apb: Simplify locking for device using global pause dmaengine: tegra-apb: Remove unnecessary return statements and variables dmaengine: tegra-apb: Avoid unnecessary channel base address calculation dmaengine: tegra-apb: Remove unused variables ...
2015-09-04 11:10:18 -07:00
dmaengine updates for 4.3-rc1 This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Others - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJV5+nSAAoJEHwUBw8lI4NHiXQQAI/++7PmUGZ6BDZGu0B9Bj7U JalNijm43p858nka1zVhDea8pi7Cq3zJdE8EAB7FPQGESvCODWr62oZBr+mSaQ1C oU1RTIRTSiU2HPE4EFeGUvVGrnmTbHR2b1apI1SU41gKn+oQ5RJRRoQwEVwO6uuZ 1VYcUqhurIAZs1FrMIAUa2vg7KTcK9UotfwR2gGBmSvXMf1aJ/dNZC7i/pBJjoyt v6KrLuYjEBAJvY7l368+NhLY/MS+2xdCMQo84B+HNEG7eA7y2MFOcRPXQA3a7dzr NwNuAZcTYDU11r2jiAPcnBM5sPo4bokX6Td0oDbYH6Rn2uIWlof7jGIceUaWLQQq QGZc4QPI4KdjTGNedRN8g9zqv0irFVfDr5v1A+B7N7ehvlubnB4jV8LmLpqN6UQH B38VnDJ3hqdZ6j9RHQTyUoQskSYMPbOAUYbL0qQLkyx8AnLc8TRv7DgtSvZjnz5W oF6So2A5SWZ7UmXKupd6TKtdyG3xtFAh+/MGVQ1RS9bCmnyhaIxJRiJwfftCBTBx IZePOsqlwl2dojM62BDlGS4CLRZve2VgiUEJaPINsdm/On3tQs9+iDbNY3cpvLQS P9u4po1TQPZnKG732vPAxEqdlq709kta7Fj5KIEvNjuWBBGKfypNP8BHKRvTLFlR kcbO03NzwSO6PZpmiUsx =gQZ6 -----END PGP SIGNATURE----- Merge tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine updates from Vinod Koul: "This time we have aded a new capability for scatter-gathered memset using dmaengine APIs. This is supported in xdmac & hdmac drivers We have added support for reusing descriptors for examples like video buffers etc. Driver will follow The behaviour of descriptor ack has been clarified and documented New devices added are: - dma controller in sun[457]i SoCs - lpc18xx dmamux - ZTE ZX296702 dma controller - Analog Devices AXI-DMAC DMA controller - eDMA support for dma-crossbar - imx6sx support in imx-sdma driver - imx-sdma device to device support Other: - jz4780 fixes - ioatdma large refactor and cleanup for removal of ioat v1 and v2 which is deprecated and fixes - ACPI support in X-Gene DMA engine driver - ipu irq fixes - mvxor fixes - minor fixes spread thru drivers" [ The Kconfig and Makefile entries got re-sorted alphabetically, and I handled the conflict with the new Intel integrated IDMA driver by slightly mis-sorting it on purpose: "IDMA64" got sorted after "IMX" in order to keep the Intel entries together. I think it might be a good idea to just rename the IDMA64 config entry to INTEL_IDMA64 to make the sorting be a true sort, not this mismash. Also, this merge disables the COMPILE_TEST for the sun4i DMA controller, because it does not compile cleanly at all. - Linus ] * tag 'dmaengine-4.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits) dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs dmaengine :ipu: change ipu_irq_handler() to remove compile warning dmaengine: ioatdma: Fix variable array length dmaengine: ioatdma: fix sparse "error" with prep lock dmaengine: hdmac: Add memset capabilities dmaengine: sort the sh Makefile dmaengine: sort the sh Kconfig dmaengine: sort the dw Kconfig dmaengine: sort the Kconfig dmaengine: sort the makefile drivers/dma: make mv_xor.c driver explicitly non-modular dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller devicetree: Add bindings documentation for Analog Devices AXI-DMAC dmaengine: xgene-dma: Fix the lock to allow client for further submission of requests dmaengine: ioatdma: fix coccinelle warning dmaengine: ioatdma: fix zero day warning on incompatible pointer type dmaengine: tegra-apb: Simplify locking for device using global pause dmaengine: tegra-apb: Remove unnecessary return statements and variables dmaengine: tegra-apb: Avoid unnecessary channel base address calculation dmaengine: tegra-apb: Remove unused variables ...
2015-09-04 11:10:18 -07:00
dmaengine: pxa: add pxa dmaengine driver This is a new driver for pxa SoCs, which is also compatible with the former mmp_pdma. The rationale behind a new driver (as opposed to incremental patching) was : - the new driver relies on virt-dma, which obsoletes all the internal structures of mmp_pdma (sw_desc, hw_desc, ...), and by consequence all the functions - mmp_pdma allocates dma coherent descriptors containing not only hardware descriptors but linked list information The new driver only puts the dma hardware descriptors (ie. 4 u32) into the dma pool allocated memory. This changes completely the way descriptors are handled - the architecture behind the interrupt/tasklet management was rewritten to be more conforming to virt-dma - the buffers alignment is handled differently The former driver assumed that the DMA channel stopped between each descriptor. The new one chains descriptors to let the channel running. This is a necessary guarantee for real-time high bandwidth usecases such as video capture on "old" architectures such as pxa. - hot chaining / cold chaining / no chaining Whenever possible, submitting a descriptor "hot chains" it to a running channel. There is still no guarantee that the descriptor will be issued, as the channel might be stopped just before the descriptor is submitted. Yet this allows to submit several video buffers, and resubmit a buffer while another is under handling. As before, dma_async_issue_pending() is the only guarantee to have all the buffers issued. When an alignment issue is detected (ie. one address in a descriptor is not a multiple of 8), if the already running channel is in "aligned mode", the channel will stop, and restarted in "misaligned mode" to finished the issued list. - descriptors reusing A submitted, issued and completed descriptor can be reused, ie resubmitted if it was prepared with the proper flag (DMA_PREP_ACK). Only a channel resources release will in this case release that buffer. This allows a rolling ring of buffers to be reused, where there are several thousands of hardware descriptors used (video buffer for example). Additionally, a set of more casual features is introduced : - debugging traces - lockless way to know if a descriptor is terminated or not The driver was tested on zylonite board (pxa3xx) and mioa701 (pxa27x), with dmatest, pxa_camera and pxamci. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-05-25 23:29:20 +02:00
dmaengine: pxa: add pxa dmaengine driver This is a new driver for pxa SoCs, which is also compatible with the former mmp_pdma. The rationale behind a new driver (as opposed to incremental patching) was : - the new driver relies on virt-dma, which obsoletes all the internal structures of mmp_pdma (sw_desc, hw_desc, ...), and by consequence all the functions - mmp_pdma allocates dma coherent descriptors containing not only hardware descriptors but linked list information The new driver only puts the dma hardware descriptors (ie. 4 u32) into the dma pool allocated memory. This changes completely the way descriptors are handled - the architecture behind the interrupt/tasklet management was rewritten to be more conforming to virt-dma - the buffers alignment is handled differently The former driver assumed that the DMA channel stopped between each descriptor. The new one chains descriptors to let the channel running. This is a necessary guarantee for real-time high bandwidth usecases such as video capture on "old" architectures such as pxa. - hot chaining / cold chaining / no chaining Whenever possible, submitting a descriptor "hot chains" it to a running channel. There is still no guarantee that the descriptor will be issued, as the channel might be stopped just before the descriptor is submitted. Yet this allows to submit several video buffers, and resubmit a buffer while another is under handling. As before, dma_async_issue_pending() is the only guarantee to have all the buffers issued. When an alignment issue is detected (ie. one address in a descriptor is not a multiple of 8), if the already running channel is in "aligned mode", the channel will stop, and restarted in "misaligned mode" to finished the issued list. - descriptors reusing A submitted, issued and completed descriptor can be reused, ie resubmitted if it was prepared with the proper flag (DMA_PREP_ACK). Only a channel resources release will in this case release that buffer. This allows a rolling ring of buffers to be reused, where there are several thousands of hardware descriptors used (video buffer for example). Additionally, a set of more casual features is introduced : - debugging traces - lockless way to know if a descriptor is terminated or not The driver was tested on zylonite board (pxa3xx) and mioa701 (pxa27x), with dmatest, pxa_camera and pxamci. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-05-25 23:29:20 +02:00
dmaengine: pxa: add pxa dmaengine driver This is a new driver for pxa SoCs, which is also compatible with the former mmp_pdma. The rationale behind a new driver (as opposed to incremental patching) was : - the new driver relies on virt-dma, which obsoletes all the internal structures of mmp_pdma (sw_desc, hw_desc, ...), and by consequence all the functions - mmp_pdma allocates dma coherent descriptors containing not only hardware descriptors but linked list information The new driver only puts the dma hardware descriptors (ie. 4 u32) into the dma pool allocated memory. This changes completely the way descriptors are handled - the architecture behind the interrupt/tasklet management was rewritten to be more conforming to virt-dma - the buffers alignment is handled differently The former driver assumed that the DMA channel stopped between each descriptor. The new one chains descriptors to let the channel running. This is a necessary guarantee for real-time high bandwidth usecases such as video capture on "old" architectures such as pxa. - hot chaining / cold chaining / no chaining Whenever possible, submitting a descriptor "hot chains" it to a running channel. There is still no guarantee that the descriptor will be issued, as the channel might be stopped just before the descriptor is submitted. Yet this allows to submit several video buffers, and resubmit a buffer while another is under handling. As before, dma_async_issue_pending() is the only guarantee to have all the buffers issued. When an alignment issue is detected (ie. one address in a descriptor is not a multiple of 8), if the already running channel is in "aligned mode", the channel will stop, and restarted in "misaligned mode" to finished the issued list. - descriptors reusing A submitted, issued and completed descriptor can be reused, ie resubmitted if it was prepared with the proper flag (DMA_PREP_ACK). Only a channel resources release will in this case release that buffer. This allows a rolling ring of buffers to be reused, where there are several thousands of hardware descriptors used (video buffer for example). Additionally, a set of more casual features is introduced : - debugging traces - lockless way to know if a descriptor is terminated or not The driver was tested on zylonite board (pxa3xx) and mioa701 (pxa27x), with dmatest, pxa_camera and pxamci. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-05-25 23:29:20 +02:00
dmaengine updates for v5.4-rc1 - Move Dmaengine DT bindings to YAML and convert Allwinner to schema. - FSL dma device_synchronize implementation - DW split acpi and of helpers and updates to driver and support for Elkhart Lake - Move filter fn as private for omap-dma and edma drivers and improvements to these drivers - Mark expected switch fall-through in couple of drivers - Renames of shdma and nbpfaxi binding document - Minor updates to bunch of drivers -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJdgKdzAAoJEHwUBw8lI4NHpS8P/R9goCZa+8gheQbgJKR7lyH0 a+6wTUA3z8bAw0Z8QiOtZkeYbSYUQSWYzPIjjOkpZXLLXvzHfDLBZ9LBEQORhPU6 hVC3RZ4hey/HFC1pyZcua6dniFIXicD/zIUvqeYTnC7gb+q7J2WgJaTub/OuZKL0 JQ45dDE219nkFWZ37wUJgAEWq2r429JoxkJwFUZeKKldpMy3pKRSCt+FPnDZZBtt n6DBSbWbzPZ6DtKGc6Sh75bFm12xHhuCS0uB6k7g3APY6T8NslpGTsFwtp5PB/Q0 5BLwLAZZjeya6RgPBne0cjZ75YFb+Rf+yLM5AErYPLZTy07/88BtMDWXSjJbDDlh BFu93hDqB/0rp28HJF9ZoH5MNp181cyvkQztt83gB97Lkk8wBGAyvqIExe2ZeHw6 XJibCDjS9A1xjxWi4IBx/YyiSOesrnWvRvFcCXnEcsRM74m2xX9oLC+dwQgx2o9f 92V5edxojDlKk8J2ZNX8meojIXx955/et6SgUC61S/hhpZAMnJgNfBJ0FtrR2q3Q qnpYsy1Ef9399laQGRzPQ2wgs6PRQfoNTZUa1evTQW3fBdoy+yF19tsVhVwhxXt8 LqKL6Y/fKlL7/wtdBQIeyJLp3CF1EyaePuZcaUnd/BM8ZKLetCT64iM6nJLjoZY9 xpYkmce5/u+65x0mQJ/B =Q8bz -----END PGP SIGNATURE----- Merge tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine updates from Vinod Koul: - Move Dmaengine DT bindings to YAML and convert Allwinner to schema. - FSL dma device_synchronize implementation - DW split acpi and of helpers and updates to driver and support for Elkhart Lake - Move filter fn as private for omap-dma and edma drivers and improvements to these drivers - Mark expected switch fall-through in couple of drivers - Renames of shdma and nbpfaxi binding document - Minor updates to bunch of drivers * tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (55 commits) dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits() dmaengine: ti: edma: Only reset region0 access registers dmaengine: ti: edma: Do not reset reserved paRAM slots dmaengine: iop-adma.c: fix printk format warning dmaengine: stm32-dma: Use struct_size() helper dt-bindings: dmaengine: dma-common: Fix the dma-channel-mask property dmanegine: ioat/dca: Use struct_size() helper dmaengine: iop-adma: remove set but not used variable 'slots_per_op' dmaengine: dmatest: Add support for completion polling dmaengine: ti: omap-dma: Remove variable override in omap_dma_tx_status() dmaengine: ti: omap-dma: Remove 'Assignment in if condition' dmaengine: ti: edma: Remove 'Assignment in if condition' dmaengine: dw: platform: Split OF helpers to separate module dmaengine: dw: platform: Split ACPI helpers to separate module dmaengine: dw: platform: Move handle check to dw_dma_acpi_controller_register() dmaengine: dw: platform: Switch to acpi_dma_controller_register() dmaengine: dw: platform: Use devm_platform_ioremap_resource() dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake dmaengine: dw: platform: Use struct dw_dma_chip_pdata dmaengine: dw: Export struct dw_dma_chip_pdata for wider use ...
2019-09-17 19:04:40 -07:00
dmaengine: Add Synopsys eDMA IP core driver Add Synopsys PCIe Endpoint eDMA IP core driver to kernel. This IP is generally distributed with Synopsys PCIe Endpoint IP (depends of the use and licensing agreement). This core driver, initializes and configures the eDMA IP using vma-helpers functions and dma-engine subsystem. This driver can be compile as built-in or external module in kernel. To enable this driver just select DW_EDMA option in kernel configuration, however it requires and selects automatically DMA_ENGINE and DMA_VIRTUAL_CHANNELS option too. In order to transfer data from point A to B as fast as possible this IP requires a dedicated memory space containing linked list of elements. All elements of this linked list are continuous and each one describes a data transfer (source and destination addresses, length and a control variable). For the sake of simplicity, lets assume a memory space for channel write 0 which allows about 42 elements. +---------+ | Desc #0 |-+ +---------+ | V +----------+ | Chunk #0 |-+ | CB = 1 | | +----------+ +-----+ +-----------+ +-----+ +----------+ +->| Burst #0 |->| ... |->| Burst #41 |->| llp | | +----------+ +-----+ +-----------+ +-----+ V +----------+ | Chunk #1 |-+ | CB = 0 | | +-----------+ +-----+ +-----------+ +-----+ +----------+ +->| Burst #42 |->| ... |->| Burst #83 |->| llp | | +-----------+ +-----+ +-----------+ +-----+ V +----------+ | Chunk #2 |-+ | CB = 1 | | +-----------+ +-----+ +------------+ +-----+ +----------+ +->| Burst #84 |->| ... |->| Burst #125 |->| llp | | +-----------+ +-----+ +------------+ +-----+ V +----------+ | Chunk #3 |-+ | CB = 0 | | +------------+ +-----+ +------------+ +-----+ +----------+ +->| Burst #126 |->| ... |->| Burst #129 |->| llp | +------------+ +-----+ +------------+ +-----+ Legend: - Linked list, also know as Chunk - Linked list element*, also know as Burst *CB*, also know as Change Bit, it's a control bit (and typically is toggled) that allows to easily identify and differentiate between the current linked list and the previous or the next one. - LLP, is a special element that indicates the end of the linked list element stream also informs that the next CB should be toggle On every last Burst of the Chunk (Burst #41, Burst #83, Burst #125 or even Burst #129) is set some flags on their control variable (RIE and LIE bits) that will trigger the send of "done" interruption. On the interruptions callback, is decided whether to recycle the linked list memory space by writing a new set of Bursts elements (if still exists Chunks to transfer) or is considered completed (if there is no Chunks available to transfer). On scatter-gather transfer mode, the client will submit a scatter-gather list of n (on this case 130) elements, that will be divide in multiple Chunks, each Chunk will have (on this case 42) a limited number of Bursts and after transferring all Bursts, an interrupt will be triggered, which will allow to recycle the all linked list dedicated memory again with the new information relative to the next Chunk and respective Burst associated and repeat the whole cycle again. On cyclic transfer mode, the client will submit a buffer pointer, length of it and number of repetitions, in this case each burst will correspond directly to each repetition. Each Burst can describes a data transfer from point A(source) to point B(destination) with a length that can be from 1 byte up to 4 GB. Since dedicated the memory space where the linked list will reside is limited, the whole n burst elements will be organized in several Chunks, that will be used later to recycle the dedicated memory space to initiate a new sequence of data transfers. The whole transfer is considered has completed when it was transferred all bursts. Currently this IP has a set well-known register map, which includes support for legacy and unroll modes. Legacy mode is version of this register map that has multiplexer register that allows to switch registers between all write and read channels and the unroll modes repeats all write and read channels registers with an offset between them. This register map is called v0. The IP team is creating a new register map more suitable to the latest PCIe features, that very likely will change the map register, which this version will be called v1. As soon as this new version is released by the IP team the support for this version in be included on this driver. According to the logic, patches 1, 2 and 3 should be squashed into 1 unique patch, but for the sake of simplicity of review, it was divided in this 3 patches files. Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Cc: Vinod Koul <vkoul@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Joao Pinto <jpinto@synopsys.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-06-04 15:29:22 +02:00
dma: acpi-dma: introduce ACPI DMA helpers 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: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-09 14:05:43 +03:00