[PATCH 3/8] net: thunderx: make CFG_DONE message to run through generic send-ack sequence

Vadim Lomovtsev
2019-02-06T10:15:45Z

At the end of NIC VF initialization it send CFG_DONE message to PF without
using nicvf_msg_send_to_pf routine. This potentially could re-write data in
mailbox. This commit is to implement common way of sending CFG_DONE message
by the same way with other configuration messages by using
nicvf_send_msg_to_pf() routine.

Signed-off-by: Vadim Lomovtsev <vlomovtsev@marvell.com>
---
drivers/net/ethernet/cavium/thunder/nic_main.c | 2 +-
.../net/ethernet/cavium/thunder/nicvf_main.c | 18 +++++++++++++++---
2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index 6c8dcb65ff03..90497a27df18 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -1039,7 +1039,7 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
case NIC_MBOX_MSG_CFG_DONE:
/* Last message of VF config msg sequence */
nic_enable_vf(nic, vf, true);
- goto unlock;
+ break;
case NIC_MBOX_MSG_SHUTDOWN:
/* First msg in VF teardown sequence */
if (vf >= nic->num_vf_en)
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index abf24e7dff2d..b0e8a04e0f1e 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -169,6 +169,20 @@ static int nicvf_check_pf_ready(struct nicvf *nic)
return 1;
}

+static int nicvf_send_cfg_done(struct nicvf *nic)
+{
+ union nic_mbx mbx = {};
+
+ mbx.msg.msg = NIC_MBOX_MSG_CFG_DONE;
+ if (nicvf_send_msg_to_pf(nic, &mbx)) {
+ netdev_err(nic->netdev,
+ "PF didn't respond to CFG DONE msg\n");
+ return 0;
+ }
+
+ return 1;
+}
+
static void nicvf_read_bgx_stats(struct nicvf *nic, struct bgx_stats_msg *bgx)
{
if (bgx->rx)
@@ -1416,7 +1430,6 @@ int nicvf_open(struct net_device *netdev)
struct nicvf *nic = netdev_priv(netdev);
struct queue_set *qs = nic->qs;
struct nicvf_cq_poll *cq_poll = NULL;
- union nic_mbx mbx = {};

/* wait till all queued set_rx_mode tasks completes if any */
drain_workqueue(nic->nicvf_rx_mode_wq);
@@ -1515,8 +1528,7 @@ int nicvf_open(struct net_device *netdev)
nicvf_enable_intr(nic, NICVF_INTR_RBDR, qidx);

/* Send VF config done msg to PF */
- mbx.msg.msg = NIC_MBOX_MSG_CFG_DONE;
- nicvf_write_to_mbx(nic, &mbx);
+ nicvf_send_cfg_done(nic);

return 0;