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path: root/drivers/dma/fsl-edma-common.c
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2023-12-11dmaengine: fsl-edma: fix DMA channel leak in eDMAv4Frank Li1-0/+1
Allocate channel count consistently increases due to a missing source ID (srcid) cleanup in the fsl_edma_free_chan_resources() function at imx93 eDMAv4. Reset 'srcid' at fsl_edma_free_chan_resources(). Cc: stable@vger.kernel.org Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support") Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20231127214325.2477247-1-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-09-28dmaengine: fsl-edma: fix edma4 channel enable failure on second attemptFrank Li1-2/+8
When attempting to start DMA for the second time using fsl_edma3_enable_request(), channel never start. CHn_MUX must have a unique value when selecting a peripheral slot in the channel mux configuration. The only value that may overlap is source 0. If there is an attempt to write a mux configuration value that is already consumed by another channel, a mux configuration of 0 (SRC = 0) will be written. Check CHn_MUX before writing in fsl_edma3_enable_request(). Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support") Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230823182635.2618118-1-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-09-28dmaengine: fsl-dma: fix DMA error when enabling sg if 'DONE' bit is setFrank Li1-1/+14
In eDMAv3, clearing 'DONE' bit (bit 30) of CHn_CSR is required when enabling scatter-gather (SG). eDMAv4 does not require this change. Cc: stable@vger.kernel.org Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support") Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230921144652.3259813-1-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: integrate v3 supportFrank Li1-15/+143
Significant alterations have been made to the EDMA v3's register layout. Now, each channel possesses a separate address space, encapsulating all channel-related controls and statuses, including IRQs. There are changes in bit position definitions as well. However, the fundamental control flow remains analogous to the previous versions. EDMA v3 was utilized in imx8qm, imx93, and will be in forthcoming chips. Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-13-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: move tcd into struct fsl_dma_chanFrank Li1-24/+14
Relocates the tcd into the fsl_dma_chan structure. This adjustment reduces the need to reference back to fsl_edma_engine, paving the way for EDMA V3 support. Unified the edma_writel and edma_writew functions for accessing TCD (Transfer Control Descriptor) registers. A new macro is added that can automatically detect whether a 32-bit or 16-bit access should be used based on the structure field definition. This provide better support 64-bit TCD with future v5 version. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202305271951.gmRobs3a-lkp@intel.com/ Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-11-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: simply ATTR_DSIZE and ATTR_SSIZE by using ffs()Frank Li1-13/+8
Removes all ATTR_DSIZE_*BIT(BYTE) and ATTR_SSIZE_*BIT(BYTE) definitions in edma. Uses ffs() instead, as it gives identical results. This simplifies the code and avoids adding more similar definitions in future V3 version. Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-7-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: move common IRQ handler to common.cFrank Li1-0/+26
Move the common part of IRQ handler from fsl-edma-main.c and mcf-edma-main.c to fsl-edma-common.c. This eliminates redundant code, as the both files contains mostly identical code. Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-6-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: Remove enum edma_versionFrank Li1-28/+19
The enum edma_version, which defines v1, v2, and v3, is a software concept used to distinguish IP differences. However, it is not aligned with the chip reference manual. According to the 7ulp reference manual, it should be edma2. In the future, there will be edma3, edma4, and edma5, which could cause confusion. To avoid this confusion, remove the edma_version and instead use drvdata->flags to distinguish the IP difference. Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-5-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: transition from bool fields to bitmask flags in drvdataFrank Li1-1/+1
Replace individual bool fields with bitmask flags within drvdata. This will facilitate future extensions, making it easier to add more flags to accommodate new versions of the edma IP. Signed-off-by: Frank Li <Frank.Li@nxp.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-4-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2023-08-22dmaengine: fsl-edma: clean up EXPORT_SYMBOL_GPL in fsl-edma-common.cFrank Li1-17/+0
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 <Frank.Li@nxp.com> Reviewed-by: Peng Fan <peng.fan@nxp.com> Link: https://lore.kernel.org/r/20230821161617.2142561-3-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2022-07-01dmaengine: fsl-edma: remove redundant assignment to pointer last_sgColin Ian King1-3/+0
The pointer last_sg is being assigned a value at the start of a loop however it is never read and is being re-assigned later on in both brances of an if-statement. The assignment is redundant and can be removed. Cleans up clang scan-build warning: drivers/dma/fsl-edma-common.c:563:3: warning: Value stored to 'last_sg' is never read [deadcode.DeadStores] Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Link: https://lore.kernel.org/r/20220614184759.164379-1-colin.i.king@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-28dmaengine: fsl-edma: support edma memcpyJoy Zou1-0/+31
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 <joy.zou@nxp.com> Link: https://lore.kernel.org/r/20211026090025.2777292-1-joy.zou@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-10-25dmaengine: fsl-edma: fix for missing dmamux moduleAngelo Dureghello1-1/+3
Fix following panic on system halt: Requesting system halt [ 10.600000] spi spi0.1: spi_device 0.1 cleanup [ 10.630000] fsl_edma_chan_mux() fsl_chan->edma->n_chans 64 dmamux_nr 0 [ 10.630000] *** ZERO DIVIDE *** FORMAT=4 [ 10.630000] Current process id is 38 [ 10.630000] BAD KERNEL TRAP: 00000000 [ 10.630000] PC: [<402f09ba>] fsl_edma_chan_mux+0x7c/0x12e ... Some architecture as mcf5441x (ColdFire) may not have a dmamux, so dmamux_nr is set to 0. This patch considers this case. Signed-off-by: Angelo Dureghello <angelo.dureghello@timesys.com> Link: https://lore.kernel.org/r/20210901211610.662077-1-angelo.dureghello@timesys.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-06dmaengine: fsl-edma: fix wrong tcd endianness for big-endian cpuAngelo Dureghello1-12/+14
Due to recent fixes in m68k arch-specific I/O accessor macros, this driver is not working anymore for ColdFire. Fix wrong tcd endianness removing additional swaps, since edma_writex() functions should already take care of any eventual swap if needed. Note, i could only test the change in ColdFire mcf54415 and Vybrid vf50 / Colibri where i don't see any issue. So, every feedback and test for all other SoCs involved is really appreciated. Signed-off-by: Angelo Dureghello <angelo.dureghello@timesys.com> Reported-by: kbuild test robot <lkp@intel.com> Link: https://lore.kernel.org/r/20200701225205.1674463-1-angelo.dureghello@timesys.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-06-24dmaengine: fsl-edma: Add lockdep assert for exported functionKrzysztof Kozlowski1-0/+2
Add lockdep assert for an exported function expected to be called under spin lock. Since this function is called in different modules, the lockdep assert will be self-documenting note about need for locking. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Robin Gong <yibin.gong@nxp.com> Link: https://lore.kernel.org/r/1591877861-28156-1-git-send-email-krzk@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-12-18dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platformPeng Ma1-0/+5
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 <peng.ma@nxp.com> Reviewed-by: Robin Gong <yibin.gong@nxp.com> Link: https://lore.kernel.org/r/20191212033714.4090-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-08-20dmaengine: change alignment of mux_configure32 and fsl_edma_chan_muxMao Wenan1-2/+2
The alignment of mux_configure32() and fsl_edma_chan_mux() need to be adjusted, it must start precisely at the first column after the openning parenthesis of the first line. Fixes: 9d831528a656 ("dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior intended)") Signed-off-by: Mao Wenan <maowenan@huawei.com> Link: https://lore.kernel.org/r/20190814072105.144107-3-maowenan@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-08-20dmaengine: make mux_configure32 staticMao Wenan1-1/+1
There is one sparse warning in drivers/dma/fsl-edma-common.c: drivers/dma/fsl-edma-common.c:93:6: warning: symbol 'mux_configure32' was not declared. Should it be static? Fix it by setting mux_configure32() as static. Fixes: 232a7f18cf8ec ("dmaengine: fsl-edma: add i.mx7ulp edma2 version support") Signed-off-by: Mao Wenan <maowenan@huawei.com> Link: https://lore.kernel.org/r/20190814072105.144107-2-maowenan@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-08-08dmaengine: fsl-edma: add i.mx7ulp edma2 version supportRobin Gong1-1/+17
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 <yibin.gong@nxp.com> Link: https://lore.kernel.org/r/1563952834-7731-1-git-send-email-yibin.gong@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-08dmaengine: Revert "dmaengine: fsl-edma: add i.mx7ulp edma2 version support"Vinod Koul1-17/+1
This reverts commit 7144afd025b2 ("dmaengine: fsl-edma: add i.mx7ulp edma2 version support") as this fails to build with module option due to usage of of_irq_count() which is not an exported symbol as kernel drivers are *not* expected to use it (rightly so). Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-03dmaengine: fsl-edma: add i.mx7ulp edma2 version supportRobin Gong1-1/+17
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 <yibin.gong@nxp.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-03dmaengine: fsl-edma-common: version check for v2 insteadRobin Gong1-20/+20
The next v3 i.mx7ulp edma is based on v1, so change version check logic for v2 instead. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-03dmaengine: fsl-edma-common: move dmamux register to another single functionRobin Gong1-4/+14
Prepare for edmav2 on i.mx7ulp whose dmamux register is 32bit. No function impacted. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-03dmaengine: fsl-edma: add drvdata for fsl-edmaRobin Gong1-14/+15
There are some differences between vf610 and next i.mx7ulp. Put such differences into static driver data for distinguishing easily at driver level. Change mcf-edma accordingly. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-07-03dmaengine: Revert "dmaengine: fsl-edma: support little endian for edma driver"Fabio Estevam1-5/+0
This reverts commit 002905eca5bedab08bafd9e325bbbb41670c7712. Commit 002905eca5be ("dmaengine: fsl-edma: support little endian for edma driver") incorrectly assumed that there was not little endian support in the driver. This causes hangs on Vybrid, so revert it so that Vybrid systems could boot again. Reported-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Fabio Estevam <festevam@gmail.com> Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-06-25dmaengine: fsl-edma: support little endian for edma driverPeng Ma1-0/+5
Our platforms with below registers(CHCFG0 - CHCFG15) of eDMA *-----------------------------------------------------------* | Offset | Big endian Register| Little endian Register| |--------------|--------------------|-----------------------| | 0x0 | CHCFG0 | CHCFG3 | |--------------|--------------------|-----------------------| | 0x1 | CHCFG1 | CHCFG2 | |--------------|--------------------|-----------------------| | 0x2 | CHCFG2 | CHCFG1 | |--------------|--------------------|-----------------------| | 0x3 | CHCFG3 | CHCFG0 | |--------------|--------------------|-----------------------| | ... | ...... | ...... | |--------------|--------------------|-----------------------| | 0xC | CHCFG12 | CHCFG15 | |--------------|--------------------|-----------------------| | 0xD | CHCFG13 | CHCFG14 | |--------------|--------------------|-----------------------| | 0xE | CHCFG14 | CHCFG13 | |--------------|--------------------|-----------------------| | 0xF | CHCFG15 | CHCFG12 | *-----------------------------------------------------------* Current eDMA driver does not support Little endian, so this patch is to improve edma driver to support little endian. Signed-off-by: Peng Ma <peng.ma@nxp.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-02-04dmaengine: fsl-edma: dma map slave device addressLaurentiu Tudor1-4/+62
This mapping needs to be created in order for slave dma transfers to work on systems with SMMU. The implementation mostly mimics the one in pl330 dma driver, authored by Robin Murphy. Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Suggested-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-01-07dmaengine: fsl-edma: use struct_size() in kzalloc()Gustavo A. R. Silva1-3/+1
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-10-09dmaengine: fsl-edma: remove dma_slave_config direction usageVinod Koul1-31/+43
dma_slave_config direction was marked as deprecated quite some time back, remove the usage from this driver so that the field can be removed Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-09-11dmaengine: fsl-edma: add ColdFire mcf5441x edma supportAngelo Dureghello1-4/+20
This patch adds support for ColdFire mcf5441x-family edma module. The ColdFire edma module is slightly different from fsl-edma, so a new driver is added. But most of the code is common between fsl-edma and mcf-edma so it has been collected into a separate common module fsl-edma-common (patch 1/3). Signed-off-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-09-11dmaengine: fsl-edma: add edma version and configurable registersAngelo Dureghello1-30/+76
This patch adds configurable registers (using __iomem addresses) to allow the use of fsl-edma-common code with slightly different edma module versions, as Vybrid (v1) and ColdFire (v2) are. Signed-off-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-09-11dmaengine: fsl-edma: extract common fsl-edma code (no changes in behavior ↵Angelo Dureghello1-0/+552
intended) This patch adds a new fsl-edma-common module to allow new mcf-edma module code to use most of the fsl-edma code. Signed-off-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
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