linux-dev/drivers/dma/ptdma/ptdma-dev.c, branch linus/masterLinux kernel development work - see feature brancheshttps://git.zx2c4.com/linux-dev/atom/drivers/dma/ptdma/ptdma-dev.c?h=linus%2Fmaster2022-04-20T11:08:19Zdmaengine: PTDMA: support polled mode2022-04-20T11:08:19ZIlya Novikovi.m.novikov@yadro.com2022-04-13T11:37:33Zurn:sha1:d965068259d13fde49487b45064106d3d0c57a74
If the DMA_PREP_INTERRUPT flag is not provided, run in polled mode,
which significantly improves IOPS: more than twice on chunks < 4K.
Signed-off-by: Ilya Novikov <i.m.novikov@yadro.com>
Link: https://lore.kernel.org/r/20220413113733.59041-1-i.m.novikov@yadro.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: ptdma: Fix the error handling path in pt_core_init()2022-02-15T05:17:36ZChristophe JAILLETchristophe.jaillet@wanadoo.fr2022-02-05T06:58:44Zurn:sha1:3c62fd3406e0b2277c76a6984d3979c7f3f1d129
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: fa5d823b16a9 ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: Christophe JAILLET <christophe.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>
dmaengine: ptdma: Add debugfs entries for PTDMA2021-08-29T13:44:20ZSanjay R Mehtasanju.mehta@amd.com2021-08-17T13:55:59Zurn:sha1:e2fb2e2a33fae6009bf68574a7eec8fcfdf9c78e
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>
dmaengine: ptdma: register PTDMA controller as a DMA resource2021-08-29T13:44:20ZSanjay R Mehtasanju.mehta@amd.com2021-08-17T13:55:58Zurn:sha1:b0b4a6b10577a2e7eaf36f46781f4759b03321a7
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>
dmaengine: ptdma: Initial driver for the AMD PTDMA2021-08-29T13:44:20ZSanjay R Mehtasanju.mehta@amd.com2021-08-17T13:55:57Zurn:sha1:fa5d823b16a9442d609617abeec31da8b6afa224
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>