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ibmvnic: Enable TSO support

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This patch enables TSO support. It includes additional
buffers reserved exclusively for large packets. Throughput
is greatly increased with TSO enabled, from about 1 Gb/s to
9 Gb/s on our test systems.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon
2017-10-17 12:36:55 -05:00
committed by David S. Miller
parent 154820563d
commit fdb061056f
2 changed files with 53 additions and 8 deletions
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5
drivers/net/ethernet/ibm/ibmvnic.h
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@@ -39,6 +39,9 @@
#define IBMVNIC_BUFFS_PER_POOL 100
#define IBMVNIC_MAX_TX_QUEUES 5
#define IBMVNIC_TSO_BUF_SZ 65536
#define IBMVNIC_TSO_BUFS 64
struct ibmvnic_login_buffer {
__be32 len;
__be32 version;
@@ -896,6 +899,8 @@ struct ibmvnic_tx_pool {
wait_queue_head_t ibmvnic_tx_comp_q;
struct task_struct *work_thread;
struct ibmvnic_long_term_buff long_term_buff;
struct ibmvnic_long_term_buff tso_ltb;
int tso_index;
};
struct ibmvnic_rx_buff {