[PATCH v0 1/1] doc: announce inter-device DMA capability support in dmadev

[PATCH v0 1/1] doc: announce inter-device DMA capability support in dmadev

[Vamsi Krishna]

From: Vamsi Attunuru <vattunuru@marvell.com>

Modern DMA hardware supports data transfer between multiple
DMA devices, enabling data communication across isolated domains or
containers. To facilitate this, the ``dmadev`` library requires changes
to allow devices to register with or unregisters from DMA groups for
inter-device communication. This feature is planned for inclusion
in DPDK 25.11.

Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com>
---
 doc/guides/rel_notes/deprecation.rst | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index e2d4125308..46836244dd 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -152,3 +152,10 @@ Deprecation Notices
 * bus/vmbus: Starting DPDK 25.11, all the vmbus API defined in
   ``drivers/bus/vmbus/rte_bus_vmbus.h`` will become internal to DPDK.
   Those API functions are used internally by DPDK core and netvsc PMD.
+
+* dmadev: a new capability flag ``RTE_DMA_CAPA_INTER_DEV`` will be added
+  to advertise DMA device's inter-device DMA copy capability. To enable
+  this functionality, a few dmadev APIs will be added to configure the DMA
+  access groups, facilitating coordinated data communication between devices.
+  A new ``dev_idx`` field will be added to the ``struct rte_dma_vchan_conf``
+  structure to configure a vchan for data transfers between any two DMA devices.
-- 
2.34.1