[dpdk-dev] [PATCH v1 1/1] doc: announce ethdev ABI change for rte_eth_dev_info.
Ian Stokes
ian.stokes at intel.com
Thu Nov 22 13:09:09 CET 2018
Maximum and minimum MTU values vary between hardware devices. In
hardware agnostic DPDK applications access to such information would
allow a more accurate way of validating and setting supported MTU values on
a per device basis rather than using a defined default for all devices.
The following solution was proposed:
http://mails.dpdk.org/archives/dev/2018-September/110959.html
This patch adds a depreciation notice for ``rte_eth_dev_info`` as new
members will be added to represent min and max MTU values. These can be
added to fit a hole in the existing structure for amd64 but not for 32 bit,
as such ABI change will occur as size of the structure will be impacted.
Signed-off-by: Ian Stokes <ian.stokes at intel.com>
---
doc/guides/rel_notes/deprecation.rst | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 34b28234c..da2b1ce15 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -49,6 +49,18 @@ Deprecation Notices
Target release for removal of the legacy API will be defined once most
PMDs have switched to rte_flow.
+* ethdev: Maximum and minimum MTU values vary between hardware devices. In
+ hardware agnostic DPDK applications access to such information would allow
+ a more accurate way of validating and setting supported MTU values on a per
+ device basis rather than using a defined default for all devices. To
+ resolve this, the following members will be added to ``rte_eth_dev_info``.
+ Note: these can be added to fit a hole in the existing structure for amd64
+ but not for 32 bit, as such ABI change will occur as size of the structure
+ will increase.
+
+ - Member ``uint16_t min_mtu`` the minimum MTU allowed.
+ - Member ``uint16_t max_mtu`` the maximum MTU allowed.
+
* pdump: As we changed to use generic IPC, some changes in APIs and structure
are expected in subsequent release.
--
2.13.6
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