kernel/linux.git/drivers/dma/Kconfig, branch v4.14.286

dmaengine: ioat: depends on !UML

2021-09-26T11:37:29+00:00

[ Upstream commit bbac7a92a46f0876e588722ebe552ddfe6fd790f ] Now that UML has PCI support, this driver must depend also on !UML since it pokes at X86_64 architecture internals that don't exist on ARCH=um. Reported-by: Geert Uytterhoeven Signed-off-by: Johannes Berg Acked-by: Dave Jiang Link: https://lore.kernel.org/r/20210809112409.a3a0974874d2.I2ffe3d11ed37f735da2f39884a74c953b258b995@changeid Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: ALTERA_MSGDMA depends on HAS_IOMEM

2021-06-30T12:48:48+00:00

[ Upstream commit 253697b93c2a1c237d34d3ae326e394aeb0ca7b3 ] When CONFIG_HAS_IOMEM is not set/enabled, certain iomap() family functions [including ioremap(), devm_ioremap(), etc.] are not available. Drivers that use these functions should depend on HAS_IOMEM so that they do not cause build errors. Repairs this build error: s390-linux-ld: drivers/dma/altera-msgdma.o: in function `request_and_map': altera-msgdma.c:(.text+0x14b0): undefined reference to `devm_ioremap' Fixes: a85c6f1b2921 ("dmaengine: Add driver for Altera / Intel mSGDMA IP core") Signed-off-by: Randy Dunlap Reported-by: kernel test robot Cc: Stefan Roese Cc: Vinod Koul Cc: dmaengine@vger.kernel.org Reviewed-by: Stefan Roese Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de Link: https://lore.kernel.org/r/20210522021313.16405-2-rdunlap@infradead.org Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: dma-jz4780: Don't depend on MACH_JZ4780

2019-11-20T16:59:51+00:00

[ Upstream commit c558ecd21c852c97ff98dc6c61f715ba420ec251 ] If we make this driver depend on MACH_JZ4780, that means it can be enabled only if we're building a kernel specially crafted for a JZ4780-based board, while most GNU/Linux distributions will want one generic MIPS kernel that works on multiple boards. Signed-off-by: Paul Cercueil Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin

dmaengine: Add driver for Altera / Intel mSGDMA IP core

2017-07-18T16:34:54+00:00

This driver adds support for the Altera / Intel modular Scatter-Gather Direct Memory Access (mSGDMA) intellectual property (IP) to the Linux DMAengine subsystem. Currently it supports the following op modes: - DMA_MEMCPY - DMA_SG - DMA_SLAVE This implementation has been tested on an Altera Cyclone FPGA connected via PCIe, both on an ARM and an x86 platform. Signed-off-by: Stefan Roese Cc: Vinod Koul Signed-off-by: Vinod Koul

Merge branch 'topic/pl08x' into for-linus

2017-07-04T04:35:10+00:00

Merge branch 'topic/mxs' into for-linus

2017-07-04T04:35:01+00:00

dmaengine: Kconfig: Simplify the help text for MXS_DMA

2017-06-17T13:02:05+00:00

Currently the help text for the MXS_DMA option is incomplete as it does not mention MX6SX, MX6ULL and MX7D, for example. Instead of extending this list everytime a new SoC comes out, let's keep the text more generic. Signed-off-by: Fabio Estevam Signed-off-by: Vinod Koul

dmaengine: Kconfig: Extend the dependency for MXS_DMA

2017-06-15T04:18:42+00:00

Currently it is not possible to select the mxs dma driver when only mx6sx or mx7 are selected. Extend the dependency to allow the mxs dma driver to be built whenever ARCH_MXS or ARCH_MXC is selected. This has the benefit to avoid having to add new entries in the MXS_DMA Kconfig everytime a new i.MX SoC shows up and it also makes it consistent with the other i.MX DMA engines, such as IMX_DMA and IMX_SDMA. While at it, also pass COMPILE_TEST for increasing the build coverage. Acked-by: Stefan Agner Signed-off-by: Fabio Estevam Signed-off-by: Vinod Koul

dmaengine: pl08x: Add support for Faraday Technology FTDMAC020

2017-05-24T04:14:32+00:00

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 Signed-off-by: Vinod Koul

dmaengine: bcm-sba-raid: fix Kconfig dependencies

2017-05-19T03:20:29+00:00

The new driver requires both mailbox and raid support for compile testing: drivers/dma/built-in.o: In function `sba_remove': edma.c:(.text+0x4414): undefined reference to `mbox_free_channel' drivers/dma/built-in.o: In function `sba_issue_pending': edma.c:(.text+0x46cc): undefined reference to `mbox_send_message' drivers/dma/built-in.o: In function `sba_probe': edma.c:(.text+0x4e60): undefined reference to `mbox_request_channel' edma.c:(.text+0x5038): undefined reference to `mbox_free_channel' drivers/dma/built-in.o: In function `sba_tx_status': edma.c:(.text+0x5210): undefined reference to `mbox_client_peek_data' drivers/dma/built-in.o: In function `sba_prep_dma_pq_req': edma.c:(.text+0x5784): undefined reference to `raid6_gflog' edma.c:(.text+0x5798): undefined reference to `raid6_gflog' This rearranges the Kconfig dependencies accordingly. Fixes: 743e1c8ffe4e ("dmaengine: Add Broadcom SBA RAID driver") Signed-off-by: Arnd Bergmann Signed-off-by: Vinod Koul