kernel/git/stable/linux.git/drivers/dma/fsl-edma.c, branch master

dmaengine: fsl-edma: clean up EXPORT_SYMBOL_GPL in fsl-edma-common.c

2023-08-22T14:41:02+00:00

Exported functions in fsl-edma-common.c are only used within fsl-edma.c and mcf-edma.c. Global export is unnecessary. This commit removes all EXPORT_SYMBOL_GPL in fsl-edma-common.c, and renames fsl-edma.c and mcf-edma.c to maintain the same final module names as before, thereby simplifying the codebase. Signed-off-by: Frank Li Reviewed-by: Peng Fan Link: https://lore.kernel.org/r/20230821161617.2142561-3-Frank.Li@nxp.com Signed-off-by: Vinod Koul

dmaengine: fsl-edma: use struct_size() helper

2023-08-21T13:05:23+00:00

Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Signed-off-by: Yu Liao Link: https://lore.kernel.org/r/20230821073600.4078584-1-liaoyu15@huawei.com Signed-off-by: Vinod Koul

dmaengine: drivers: Use devm_platform_ioremap_resource()

2023-01-18T16:46:47+00:00

platform_get_resource() and devm_ioremap_resource() are wrapped up in the devm_platform_ioremap_resource() helper. Use the helper and get rid of the local variable for struct resource *. We now have a function call less. Signed-off-by: Tudor Ambarus Acked-by: Jernej Skrabec Acked-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20221110152528.7821-1-tudor.ambarus@microchip.com Signed-off-by: Vinod Koul

dmaengine: fsl-edma: support edma memcpy

2021-10-28T17:26:24+00:00

Add memcpy in edma. The edma has the capability to transfer data by software trigger so that it could be used for memory copy. Enable MEMCPY for edma driver and it could be test directly by dmatest. Signed-off-by: Joy Zou Link: https://lore.kernel.org/r/20211026090025.2777292-1-joy.zou@nxp.com Signed-off-by: Vinod Koul

dmaengine: fsl-edma: Fix NULL pointer exception in fsl_edma_tx_handler

2020-06-24T07:35:01+00:00

NULL pointer exception happens occasionally on serial output initiated by login timeout. This was reproduced only if kernel was built with significant debugging options and EDMA driver is used with serial console. col-vf50 login: root Password: Login timed out after 60 seconds. Unable to handle kernel NULL pointer dereference at virtual address 00000044 Internal error: Oops: 5 [#1] ARM CPU: 0 PID: 157 Comm: login Not tainted 5.7.0-next-20200610-dirty #4 Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) (fsl_edma_tx_handler) from [<8016eb10>] (__handle_irq_event_percpu+0x64/0x304) (__handle_irq_event_percpu) from [<8016eddc>] (handle_irq_event_percpu+0x2c/0x7c) (handle_irq_event_percpu) from [<8016ee64>] (handle_irq_event+0x38/0x5c) (handle_irq_event) from [<801729e4>] (handle_fasteoi_irq+0xa4/0x160) (handle_fasteoi_irq) from [<8016ddcc>] (generic_handle_irq+0x34/0x44) (generic_handle_irq) from [<8016e40c>] (__handle_domain_irq+0x54/0xa8) (__handle_domain_irq) from [<80508bc8>] (gic_handle_irq+0x4c/0x80) (gic_handle_irq) from [<80100af0>] (__irq_svc+0x70/0x98) Exception stack(0x8459fe80 to 0x8459fec8) fe80: 72286b00 e3359f64 00000001 0000412d a0070013 85c98840 85c98840 a0070013 fea0: 8054e0d4 00000000 00000002 00000000 00000002 8459fed0 8081fbe8 8081fbec fec0: 60070013 ffffffff (__irq_svc) from [<8081fbec>] (_raw_spin_unlock_irqrestore+0x30/0x58) (_raw_spin_unlock_irqrestore) from [<8056cb48>] (uart_flush_buffer+0x88/0xf8) (uart_flush_buffer) from [<80554e60>] (tty_ldisc_hangup+0x38/0x1ac) (tty_ldisc_hangup) from [<8054c7f4>] (__tty_hangup+0x158/0x2bc) (__tty_hangup) from [<80557b90>] (disassociate_ctty.part.1+0x30/0x23c) (disassociate_ctty.part.1) from [<8011fc18>] (do_exit+0x580/0xba0) (do_exit) from [<801214f8>] (do_group_exit+0x3c/0xb4) (do_group_exit) from [<80121580>] (__wake_up_parent+0x0/0x14) Issue looks like race condition between interrupt handler fsl_edma_tx_handler() (called as result of fsl_edma_xfer_desc()) and terminating the transfer with fsl_edma_terminate_all(). The fsl_edma_tx_handler() handles interrupt for a transfer with already freed edesc and idle==true. Fixes: d6be34fbd39b ("dma: Add Freescale eDMA engine driver support") Signed-off-by: Krzysztof Kozlowski Reviewed-by: Robin Gong Cc: Link: https://lore.kernel.org/r/1591877861-28156-2-git-send-email-krzk@kernel.org Signed-off-by: Vinod Koul

dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform

2019-12-18T06:25:46+00:00

Our platforms(such as LS1021A, LS1012A, LS1043A, LS1046A, LS1028A) with below registers(CHCFG0 - CHCFG15) of eDMA as follows: *-----------------------------------------------------------* | Offset | OTHERS | LS1028A | |--------------|--------------------|-----------------------| | 0x0 | CHCFG0 | CHCFG3 | |--------------|--------------------|-----------------------| | 0x1 | CHCFG1 | CHCFG2 | |--------------|--------------------|-----------------------| | 0x2 | CHCFG2 | CHCFG1 | |--------------|--------------------|-----------------------| | 0x3 | CHCFG3 | CHCFG0 | |--------------|--------------------|-----------------------| | ... | ...... | ...... | |--------------|--------------------|-----------------------| | 0xC | CHCFG12 | CHCFG15 | |--------------|--------------------|-----------------------| | 0xD | CHCFG13 | CHCFG14 | |--------------|--------------------|-----------------------| | 0xE | CHCFG14 | CHCFG13 | |--------------|--------------------|-----------------------| | 0xF | CHCFG15 | CHCFG12 | *-----------------------------------------------------------* This patch is to improve edma driver to fit LS1028A platform. Signed-off-by: Peng Ma Reviewed-by: Robin Gong Link: https://lore.kernel.org/r/20191212033714.4090-1-peng.ma@nxp.com Signed-off-by: Vinod Koul

dmaengine: fsl-edma: implement .device_synchronize callback

2019-08-08T13:31:58+00:00

Implement .device_synchronize callback in order to be able to use dmaengine_terminate_sync() and other primitives relying on said callback. Signed-off-by: Andrey Smirnov Cc: Stefan Agner Cc: Chris Healy Cc: Vinod Koul Cc: linux-imx@nxp.com Cc: dmaengine@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: https://lore.kernel.org/r/20190731173659.14778-1-andrew.smirnov@gmail.com Signed-off-by: Vinod Koul

dmaengine: fsl-edma: add i.mx7ulp edma2 version support

2019-08-08T12:24:36+00:00

Add edma2 for i.mx7ulp by version v3, since v2 has already been used by mcf-edma. The big changes based on v1 are belows: 1. only one dmamux. 2. another clock dma_clk except dmamux clk. 3. 16 independent interrupts instead of only one interrupt for all channels. Signed-off-by: Robin Gong Link: https://lore.kernel.org/r/1563952834-7731-1-git-send-email-yibin.gong@nxp.com Signed-off-by: Vinod Koul

dmaengine: Remove dev_err() usage after platform_get_irq()

2019-07-31T15:20:53+00:00

We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // While we're here, remove braces on if statements that only have one statement (manually). Cc: Vinod Koul Cc: Dan Williams Cc: dmaengine@vger.kernel.org Cc: Greg Kroah-Hartman Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20190730181557.90391-11-swboyd@chromium.org Signed-off-by: Vinod Koul

Merge tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2019-07-17T16:55:43+00:00

Pull dmaengine updates from Vinod Koul: - Add support in dmaengine core to do device node checks for DT devices and update bunch of drivers to use that and remove open coding from drivers - New driver/driver support for new hardware, namely: - MediaTek UART APDMA - Freescale i.mx7ulp edma2 - Synopsys eDMA IP core version 0 - Allwinner H6 DMA - Updates to axi-dma and support for interleaved cyclic transfers - Greg's debugfs return value check removals on drivers - Updates to stm32-dma, hsu, dw, pl330, tegra drivers * tag 'dmaengine-5.3-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (68 commits) dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support" dmaengine: at_xdmac: check for non-empty xfers_list before invoking callback Documentation: dmaengine: clean up description of dmatest usage dmaengine: tegra210-adma: remove PM_CLK dependency dmaengine: fsl-edma: add i.mx7ulp edma2 version support dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma dmaengine: fsl-edma-common: version check for v2 instead dmaengine: fsl-edma-common: move dmamux register to another single function dmaengine: fsl-edma: add drvdata for fsl-edma dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver" dmaengine: rcar-dmac: Reject zero-length slave DMA requests dmaengine: dw: Enable iDMA 32-bit on Intel Elkhart Lake dmaengine: dw-edma: fix semicolon.cocci warnings dmaengine: sh: usb-dmac: Use [] to denote a flexible array member dmaengine: dmatest: timeout value of -1 should specify infinite wait dmaengine: dw: Distinguish ->remove() between DW and iDMA 32-bit dmaengine: fsl-edma: support little endian for edma driver dmaengine: hsu: Revert "set HSU_CH_MTSR to memory width" dmagengine: pl330: add code to get reset property dt-bindings: pl330: document the optional resets property ...