[PATCH v3] PCI: ABI change request for adding new field in rte_pci_id structure

[Ziye Yang <ziye.yang@intel.com>]

From: Ziye <ziye.yang@intel.com>

The purpose of this patch is used to add a new field
"class" in rte_pci_id structure. The new class field includes
class_id, subcalss_id, programming interface of a pci device.
With this field, we can identify pci device by its class info,
which can be more flexible instead of probing the device by
vendor_id OR device_id OR subvendor_id OR subdevice_id.
For example, we can probe all nvme devices by class field, which
can be quite convenient.

Signed-off-by: Ziye Yang <ziye.yang@intel.com>
---
 doc/guides/rel_notes/deprecation.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index e94d4a2..9fa2433 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -49,3 +49,9 @@ Deprecation Notices
   commands (such as RETA update in testpmd).  This should impact
   CMDLINE_PARSE_RESULT_BUFSIZE, STR_TOKEN_SIZE and RDLINE_BUF_SIZE.
   It should be integrated in release 2.3.
+
+* ABI changes are planned for struct rte_pci_id, i.e., add new field ``class``.
+  This new added ``class`` field can be used to probe pci device by class
+  related info. This change should impact size of struct rte_pci_id and struct
+  rte_pci_device. The release 16.04 does not contain these ABI changes, but
+  release 16.07 will.
-- 
1.9.3