Vinod Koul
60c10db9b1
Merge tag 'dmaengine-fix-5.17' into next
...
This merges dmaengine/dmaengine-fix-5.17 tag into next as that is
already merged mainline and resolves depencency in patches
2022-03-10 10:12:25 +05:30
Sanjay R Mehta
b6ccf01975
dmaengine: ptdma: handle the cases based on DMA is complete
...
There is a need to segregate the cases when DMA is complete or not.
In case if DMA is already complete there is no need to handle it
again and gracefully exit from the function.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1643814880-3882-3-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2022-02-15 10:54:54 +05:30
Sanjay R Mehta
6fa7e0e836
dmaengine: ptdma: fix concurrency issue with multiple dma transfer
...
The command should be submitted only if the engine is idle,
for this, the next available descriptor is checked and set the flag
to false in case the descriptor is non-empty.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1643814880-3882-2-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2022-02-15 10:54:54 +05:30
Christophe JAILLET
3c62fd3406
dmaengine: ptdma: Fix the error handling path in pt_core_init()
...
In order to free resources correctly in the error handling path of
pt_core_init(), 2 goto's have to be switched. Otherwise, some resources
will leak and we will try to release things that have not been allocated
yet.
Also move a dev_err() to a place where it is more meaningful.
Fixes: fa5d823b16christophe.jaillet@wanadoo.fr >
Acked-by: Sanjay R Mehta <sanju.mehta@amd.com >
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com >
Link: https://lore.kernel.org/r/41a963a35173f89c874f5c44df5530dc09fea8da.1644044244.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2022-02-15 10:47:36 +05:30
Sanjay R Mehta
e037e36c35
dmaengine: ptdma: remove PT_OFFSET to avoid redefnition
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Building on ARCH=um causes a "redefined" warning, so remove this
PT_OFFSET macro to avoid the warning.
drivers/dma/ptdma/ptdma.h:34: warning: "PT_OFFSET" redefined
34 | #define PT_OFFSET 0x0
|
In file included from ./arch/um/include/asm/thread_info.h:17,
from ./include/linux/thread_info.h:60,
from ./include/asm-generic/preempt.h:5,
from ./arch/um/include/generated/asm/preempt.h:1,
from ./include/linux/preempt.h:78,
from ./include/linux/spinlock.h:55,
from ./include/linux/wait.h:9,
from ./include/linux/wait_bit.h:8,
from ./include/linux/fs.h:6,
from ./include/linux/debugfs.h:15,
from drivers/dma/ptdma/ptdma-debugfs.c:12:
./arch/x86/um/shared/sysdep/ptrace_user.h:4: note: this is the location of the previous definition
4 | #define PT_OFFSET(r) ((r) * sizeof(long))
Reported-by: kernel test robot <lkp@intel.com >
Fixes: 2a99524459ce ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1630178908-54973-1-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2021-08-29 19:14:21 +05:30
Sanjay R Mehta
e2fb2e2a33
dmaengine: ptdma: Add debugfs entries for PTDMA
...
Expose data about the configuration and operation of the
PTDMA through debugfs entries: device name, capabilities,
configuration, statistics.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1629208559-51964-4-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2021-08-29 19:14:20 +05:30
Sanjay R Mehta
b0b4a6b105
dmaengine: ptdma: register PTDMA controller as a DMA resource
...
Register ptdma queue to Linux dmaengine framework as general-purpose
DMA channels.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1629208559-51964-3-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2021-08-29 19:14:20 +05:30
Sanjay R Mehta
fa5d823b16
dmaengine: ptdma: Initial driver for the AMD PTDMA
...
Add support for AMD PTDMA controller. It performs high-bandwidth
memory to memory and IO copy operation. Device commands are managed
via a circular queue of 'descriptors', each of which specifies source
and destination addresses for copying a single buffer of data.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com >
Link: https://lore.kernel.org/r/1629208559-51964-2-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org >
2021-08-29 19:14:20 +05:30
