This page covers the Linux driver for the Xilinx Soft DMA IPs, including AXI DMA, AXI CDMA, AXI MCMDA and AXI VDMA for Zynq, Zynq Ultrascale+ MPSoC, Versal and Microblaze.
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axidmatest_1: axidmatest@1 {
compatible ="xlnx,axi-dma-test-1.00.a";
dmas = <&axi_mcdma_0 0
&axi_mcdma_0 16>;
dma-names = "axidma0", "axidma1";
} ; |
| theme | Midnight |
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dmatest: Started 1 threads using dma0chan0 dma0chan1
dma0chan0-dma0c: terminating after 5 tests, 0 failures (status 0) |
AXI CDMA
Generic kernel dmatest client is used to test the functionality of IP which reads the data from one location of memory and compare the data after copying data to other location of memory....
The test client can be configured as loadable or in-built kernel module.
Device-tree Node for the test client
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vdmatest_1: vdmatest@1 {
compatible ="xlnx,axi-vdma-test-1.00.a";
xlnx,num-fstores = <0x3>;
dmas = <&axi_vdma_0 0
&axi_vdma_0 1>;
dma-names = "vdma0", "vdma1";
} ; |
Running the test client will display the message when the test is successful,
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vdmatest: Started 1 threads using dma0chan0 dma0chan1 dma0chan0-dma0c: terminating after 1 tests, 0 failures (status 0) |
Mainline Status
The current driver available in the Xilinx Linux git is in sync with the open source 5.4 kernel driver except for the following- DMA Client driver (axidmatest and vdmatest - these are xilinx specific dma client driver and not streamable)
Change Log
2023.2
- Mainline fix pulled in to handle child node error path
https://github.com/Xilinx/linux-xlnx/commits/xilinx-v2023.2/drivers/dma/xilinx/xilinx_dma.c
2023.1
- Error path handling and kernel doc fix
https://github.com/Xilinx/linux-xlnx/commits/xilinx-v2023.1/drivers/dma/xilinx/xilinx_dma.c
2022.2
No changes
2022.1
- Bugfix for IRQ mapping errors to allow deferred probe.
https://github.com/Xilinx/linux-xlnx/commits/master/drivers/dma/xilinx/xilinx_dma.c
2021.2
- Update DMA mask for high memory access.
- Documentation and smatch warning fixes.
2021.1
- 5.10 kernel rebase
- Trivial coverity fixes.
cf3db08cef1b dmaengine: xilinx_dma: Typecast with enum to fix the coverity warning
e7007bc989ff dmaengine: xilinx_dma: Modify variable type to fix the incompatible warning
c1d6cd7cde88 dmaengine: xilinx_dma: Add condition to check return value
2020.2
- MCDMA fixes (SG capability, usage of xilinx_aximcdma_tx_segment)
- Add missing check for empty list in xilinx_dma_tx_status
- use readl_poll_timeout_atomic variant
7a34a475cf62 dmaengine: xilinx_dma: Fix SG capability check for MCDMA
a44799713f85 dmaengine: xilinx_dma: Fix usage of xilinx_aximcdma_tx_segment
2aefe65f2861 dmaengine: xilinx_dma: Add missing check for empty list
d2798ec3512e dmaengine: xilinx_dma: use readl_poll_timeout_atomic variant
2020.1
- Fix dma channel node order dependency.
- MCDMA IP support.
- 5.4 kernel upgrade (Merge tag 'dmaengine-5.3-rc1' of slave tree + xilinx tree rebase patches)
Commits:
b6848e6 dmaengine: xilinx_dma: In dma channel probe fix node order dependency
87e34b2 dmaengine: xilinx_dma: Extend dma_config structure to store max channel count
9fef941 dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support
<snip>
47ebe00 Merge tag 'dmaengine-5.3-rc1' of slave tree
2019.2
- Fix SG internal error in cdma prep_dma_sg mode.
- Clear desc_pendingcount in xilinx_dma_reset.
- Check for both idle and halted state in axidma stop.
- Residue calculation and reporting.
- Remove cdmatest client. Now onwards we have to use generic dmatest client for cdma validation.
Commits:
552d3f1 dmaengine: xilinx_dma: Fix SG internal error in cdma prep_dma_sg mode
e4a9ef8 dmaengine: xilinx: Clear desc_pendingcount in xilinx_dma_reset
136cd70 dmaengine: xilinx: Check for both idle and halted state in axidma stop_transfer
478500b dmaengine: xilinx: Print debug message when no free tx segments
8eab5a1 dmaengine: xilinx: Remove residue from channel data
0f7b82f dmaengine: xilinx: Add callback_result support
bc6a6ab dmaengine: xilinx: Introduce xilinx_dma_get_residue
41176b9 dmaengine: xilinx: Merge get_callback and _invoke
976bab6 dmaengine: xilinx_dma: Remove desc_callback_valid check
2019.1
- Remove axidma multi-channel mode support
- Fix 64-bit simple AXIDMA transfer
- Fix control reg update in vdma_channel_set_config
Commits:
8c8e3b1 dmaengine: xilinx_dma: Remove axidma multi-channel mode support
c3b6c45 dmaengine: xilinx_dma: Fix 64-bit simple AXIDMA transfer
965442b dmaengine: xilinx_dma: Introduce helper macro for preparing dma address
fbde9af dmaengine: xilinx_dma: Fix control reg update in vdma_channel_set_config
2018.3
- Reset DMA channel in dma_terminate_all.
- Fix 64-bit simple CDMA transfer.
- Code refactoring.
Commits:
1c8b3af dmaengine: xilinx_dma: Reset DMA channel in dma_terminate_all
cf9dfe6 dmaengine: xilinx_dma: Minor refactoring
44b796e dmaengine: xilinx_dma: Fix 64-bit simple CDMA transfer
113e03d dmaengine: xilinx_dma: Move enum xdma_ip_type to driver file
55ea663 dmaengine: xilinx_dma: Fix typos
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