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16cd3c6701
linux/drivers/dma
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Peter Ujfalusi 16cd3c6701 dmaengine: ti: k3-udma: Workaround for RX teardown with stale data in peer 
When a channel is asked to be stopped (teardown) and we do not have active
descriptor to receive stale data buffered on the remote side then the
teardown will not complete as UDMA needs a descriptor to be able to flush
out the DMA pipe.
The peer is trying to push the data to UDMA in teardown, but UDMA is
pushing back because it has no descriptor which would allow it to drain the
data.

The workaround is to create 1K 'trashcan' to receive the discarded data and
set up descriptors for packet and TR mode channels.
When a channel is stopped and there is no active descriptor then a
descriptor is pushed to the ring for UDMA before the teardown is initiated.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200214091441.27535-3-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-02-19 13:09:10 +05:30
..
bestcomm
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
dw
dmaengine: dw: platform: Mark 'hclk' clock optional
2019-10-14 13:51:44 +05:30
dw-axi-dmac
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
dw-edma
dmaengine: dw-edma: fix endianess confusion
2019-07-22 20:58:15 +05:30
fsl-dpaa2-qdma
dmaengine: fsl-dpaa2-qdma: Remove unnecessary local variables in DPDMAI_CMD_CREATE macro
2019-11-02 22:03:01 +05:30
hsu
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
idxd
dmaengine: idxd: Fix error handling in idxd_wq_cdev_dev_setup()
2020-02-13 20:37:23 +05:30
ioat
dmaengine updates for v5.6-rc1
2020-01-27 10:55:50 -08:00
ipu
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
mediatek
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
ppc4xx
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7
2019-05-21 11:28:40 +02:00
qcom
dmaengine: qcom: bam_dma: Fix resource leak
2019-10-18 13:27:58 +05:30
sf-pdma
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
sh
dmaengine: rcar-dmac: Add dma-channel-mask property support
2019-10-14 12:26:58 +05:30
ti
dmaengine: ti: k3-udma: Workaround for RX teardown with stale data in peer
2020-02-19 13:09:10 +05:30
xilinx
dmaengine: zynqmp_dma: fix burst length configuration
2020-01-21 14:49:30 +05:30
acpi-dma.c
dmaengine: acpi: Add kernel doc parameter descriptions
2019-08-21 09:41:27 +05:30
altera-msgdma.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
amba-pl08x.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
at_hdmac_regs.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
at_hdmac.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
at_xdmac.c
dmaengine: at_xdmac: Use devm_platform_ioremap_resource() in at_xdmac_probe()
2019-10-14 13:21:20 +05:30
bcm2835-dma.c
dmaengine: bcm2835: do not call vchan_vdesc_fini() with lock held
2019-12-26 10:04:18 +05:30
bcm-sba-raid.c
dmaengine: bcm-sba-raid: no need to check return value of debugfs_create functions
2019-06-14 11:14:58 +05:30
coh901318_lli.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
coh901318.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
coh901318.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
dma-axi-dmac.c
dmaengine: axi-dmac: add a check for devm_regmap_init_mmio
2019-12-11 16:11:50 +05:30
dma-jz4780.c
dmaengine updates for v5.6-rc1
2020-01-27 10:55:50 -08:00
dmaengine.c
dmaengine: Cleanups for the slave <-> channel symlink support
2020-02-03 09:49:20 +05:30
dmaengine.h
dmaengine: Move dma_get_{,any_}slave_channel() to private dmaengine.h
2020-01-21 15:05:29 +05:30
dmatest.c
dmaengine: dmatest: Add support for completion polling
2019-09-04 10:14:22 +05:30
ep93xx_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
fsl_raid.c
dmaengine: fsl_raid: make of_device_ids const.
2017-06-29 09:25:28 +05:30
fsl_raid.h
…
fsl-edma-common.c
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-edma-common.h
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-edma.c
dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
2019-12-18 11:55:46 +05:30
fsl-qdma.c
dmaengine: fsl-qdma: fix duplicated argument to &&
2020-01-21 13:15:37 +05:30
fsldma.c
dmaengine: fsldma: Mark expected switch fall-through
2019-08-20 19:42:34 -05:00
fsldma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 40
2019-05-24 17:27:12 +02:00
hisi_dma.c
dmaengine: hisilicon: Add Kunpeng DMA engine support
2020-01-24 11:18:45 +05:30
idma64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
idma64.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
img-mdc-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 422
2019-06-05 17:37:15 +02:00
imx-dma.c
dmaengine: imx-dma: Mark expected switch fall-through
2019-07-31 20:49:04 +05:30
imx-sdma.c
dmaengine: imx-sdma: Fix memory leak
2019-12-26 10:04:19 +05:30
iop-adma.c
dmaengine: iop-adma: clean up an indentation issue
2019-11-14 10:27:37 +05:30
iop-adma.h
dma: iop-adma: allow building without platform headers
2019-08-14 15:36:22 +02:00
k3dma.c
dmaengine: k3dma: Avoid null pointer traversal
2019-12-23 13:21:14 +05:30
Kconfig
dmaengine: hisilicon: Add Kunpeng DMA engine support
2020-01-24 11:18:45 +05:30
lpc18xx-dmamux.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
Makefile
dmaengine: hisilicon: Add Kunpeng DMA engine support
2020-01-24 11:18:45 +05:30
mcf-edma.c
dmaengine: fsl-edma: add drvdata for fsl-edma
2019-07-03 13:28:22 +05:30
mic_x100_dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
mic_x100_dma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 290
2019-06-05 17:36:38 +02:00
milbeaut-hdmac.c
dmaengine: milbeaut-hdmac: remove redundant error log
2019-11-08 09:26:17 +05:30
milbeaut-xdmac.c
dmaengine: milbeaut-xdmac: remove redundant error log
2019-11-08 09:26:17 +05:30
mmp_pdma.c
dmaengine: mmp_pdma: add missed of_dma_controller_free
2019-11-22 10:51:30 +05:30
mmp_tdma.c
dmaengine: mmp_tdma: add missed of_dma_controller_free
2019-11-22 10:51:29 +05:30
moxart-dma.c
treewide: Use struct_size() for kmalloc()-family
2018-06-06 11:15:43 -07:00
mpc512x_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7
2019-05-21 11:28:40 +02:00
mv_xor_v2.c
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
mv_xor.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
mv_xor.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
2019-06-05 17:36:37 +02:00
mxs-dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
nbpfaxi.c
dmaengine: nbpfaxi: Use dev_get_drvdata()
2019-04-29 10:47:15 +05:30
of-dma.c
dmaengine: Move dma_get_{,any_}slave_channel() to private dmaengine.h
2020-01-21 15:05:29 +05:30
owl-dma.c
dmaengine: virt-dma: Add missing locking
2019-12-26 10:04:18 +05:30
pch_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
pl330.c
dmaengine: pl330: Convert to the *_late and *_early system sleep callbacks
2019-12-10 11:39:04 +05:30
plx_dma.c
dmaengine: plx-dma: Implement descriptor submission
2020-01-15 19:40:51 +05:30
pxa_dma.c
dmaengine updates for v5.3-rc1
2019-07-17 09:55:43 -07:00
s3c24xx-dma.c
dmaengine: s3c24xx-dma: fix spelling mistake "to" -> "too"
2020-01-23 17:03:25 +05:30
sa11x0-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
sirf-dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4
2019-05-21 11:28:40 +02:00
sprd-dma.c
dmaengine: sprd: Add wrap address support for link-list mode
2019-11-14 16:03:35 +05:30
st_fdma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
st_fdma.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
ste_dma40_ll.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
ste_dma40_ll.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
2019-05-30 11:29:22 -07:00
ste_dma40.c
dmaengine: ste_dma40: fix unneeded variable warning
2019-07-22 20:58:33 +05:30
stm32-dma.c
dmaengine: stm32-dma: Use struct_size() helper
2019-09-04 10:25:08 +05:30
stm32-dmamux.c
dmaengine: stm32-dmamux: Switch to use device_property_count_u32()
2019-07-29 12:25:21 +05:30
stm32-mdma.c
dmaengine updates for v5.4-rc1
2019-09-17 19:04:40 -07:00
sun4i-dma.c
dmaengine: sun4i: Add support for cyclic requests with dedicated DMA
2020-01-21 14:04:29 +05:30
sun6i-dma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
tegra20-apb-dma.c
dmaengine: tegra-apb: Support per-burst residue granularity
2019-07-25 15:55:51 +05:30
tegra210-adma.c
dmaengine: tegra210-adma: fix transfer failure
2019-10-14 12:40:38 +05:30
timb_dma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
TODO
…
txx9dmac.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
txx9dmac.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
uniphier-mdmac.c
dmaengine: uniphier-mdmac: use devm_platform_ioremap_resource()
2019-10-11 15:45:41 +05:30
virt-dma.c
dmaengine updates for v5.6-rc1
2020-01-27 10:55:50 -08:00
virt-dma.h
dmaengine: virt-dma: Add missing locking around list operations
2019-12-26 10:04:18 +05:30
xgene-dma.c
dmaengine: Remove dev_err() usage after platform_get_irq()
2019-07-31 20:50:53 +05:30
zx_dma.c
dmaengine: zx: remove: removed dmam_pool_destroy
2019-11-14 12:16:53 +05:30