kernel.git/drivers/dma/idxd/submit.c, branch linux-5.7.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-5.7.y2020-01-24T05:48:45Zdmaengine: idxd: add char driver to expose submission portal to userland2020-01-24T05:48:45ZDave Jiang2020-01-21T23:44:29Zurn:sha1:42d279f9137ab7d5503836baec2739284b278d8f
Create a char device region that will allow acquisition of user portals in
order to allow applications to submit DMA operations. A char device will be
created per work queue that gets exposed. The workqueue type "user"
is used to mark a work queue for user char device. For example if the
workqueue 0 of DSA device 0 is marked for char device, then a device node
of /dev/dsa/wq0.0 will be created.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/157965026985.73301.976523230037106742.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: idxd: connect idxd to dmaengine subsystem2020-01-24T05:48:45ZDave Jiang2020-01-21T23:44:23Zurn:sha1:8f47d1a5e545f903cd049c42da31a3be36178447
Add plumbing for dmaengine subsystem connection. The driver register a DMA
device per DSA device. The channels are dynamically registered when a
workqueue is configured to be "kernel:dmanegine" type.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/157965026376.73301.13867988830650740445.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
dmaengine: idxd: add descriptor manipulation routines2020-01-24T05:48:45ZDave Jiang2020-01-21T23:44:17Zurn:sha1:d1dfe5b8ac644a0ffccfe7af22abed7c80b34702
This commit adds helper functions for DSA descriptor allocation,
submission, and free operations.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/157965025757.73301.12692876585357550065.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>