[dpdk-dev] [PATCH v2 27/27] config: add configurations for enabling 'Extended Tag' or resetting 'Max Read Request Size'

[Helin Zhang]

Sys files of 'extended_tag' and 'max_read_request_size' have been
supported in igb_uio, and can be changed during probing PCI. Three
items in configuration files are needed to support them at compile
time. Those three items are,
 - CONFIG_RTE_PCI_CONFIG
 - CONFIG_RTE_PCI_EXTENDED_TAG
 - CONFIG_RTE_PCI_MAX_READ_REQUEST_SIZE

Signed-off-by: Helin Zhang <helin.zhang at intel.com>
Signed-off-by: Jing Chen <jing.d.chen at intel.com>
Acked-by: Cunming Liang <cunming.liang at intel.com>
Acked-by: Jijiang Liu <jijiang.liu at intel.com>
Acked-by: Jingjing Wu <jingjing.wu at intel.com>
Tested-by: Waterman Cao <waterman.cao at intel.com>
---
 config/common_linuxapp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/config/common_linuxapp b/config/common_linuxapp
index da20011..a020451 100644
--- a/config/common_linuxapp
+++ b/config/common_linuxapp
@@ -125,6 +125,16 @@ CONFIG_RTE_EAL_ALLOW_INV_SOCKET_ID=n
 CONFIG_RTE_EAL_ALWAYS_PANIC_ON_ERROR=n
 
 #
+# Special configurations in PCI Config Space for high performance
+# CONFIG_RTE_PCI_CONFIG is the compile switch for two features below
+# CONFIG_RTE_PCI_EXTENDED_TAG can be "on", "off"
+# CONFIG_RTE_PCI_MAX_READ_REQUEST_SIZE can be 128, 256, 512, 1024, 2048, 4096
+#
+CONFIG_RTE_PCI_CONFIG=n
+CONFIG_RTE_PCI_EXTENDED_TAG=""
+CONFIG_RTE_PCI_MAX_READ_REQUEST_SIZE=0
+
+#
 # Compile Environment Abstraction Layer for linux
 #
 CONFIG_RTE_LIBRTE_EAL_LINUXAPP=y
-- 
1.8.1.4