[PATCH net-next v2 1/4] ibmveth: change rx buffer default allocation for CMO

[Thomas Falcon <tlfalcon@linux.vnet.ibm.com>]

This patch enables 64k rx buffer pools by default.  If Cooperative
Memory Overcommitment (CMO) is enabled, the number of 64k buffers
is reduced to save memory.

Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmveth.c | 3 +++
 drivers/net/ethernet/ibm/ibmveth.h | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index cd7675a..0210622 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1424,6 +1424,9 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 
 	memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN);
 
+	if (firmware_has_feature(FW_FEATURE_CMO))
+		memcpy(pool_count, pool_count_cmo, sizeof(pool_count));
+
 	for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
 		struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
 		int error;
diff --git a/drivers/net/ethernet/ibm/ibmveth.h b/drivers/net/ethernet/ibm/ibmveth.h
index 1f37499..0dc664b 100644
--- a/drivers/net/ethernet/ibm/ibmveth.h
+++ b/drivers/net/ethernet/ibm/ibmveth.h
@@ -104,7 +104,8 @@ static inline long h_illan_attributes(unsigned long unit_address,
 
 static int pool_size[] = { 512, 1024 * 2, 1024 * 16, 1024 * 32, 1024 * 64 };
 static int pool_count[] = { 256, 512, 256, 256, 256 };
-static int pool_active[] = { 1, 1, 0, 0, 0};
+static int pool_count_cmo[] = { 256, 512, 256, 256, 64 };
+static int pool_active[] = { 1, 1, 0, 0, 1};
 
 #define IBM_VETH_INVALID_MAP ((u16)0xffff)
 
-- 
1.9.3