[PATCH 3.19.y-ckt 250/251] net/mlx4_core: Enhance the MAD_IFC wrapper to convert VF port to physical

[Kamal Mostafa]

3.19.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Or Gerlitz <ogerlitz at mellanox.com>

commit 7c35ef4525c3255c747b935fe5af9ef4d1fbbf93 upstream.

Single port VFs always provide port = 1 (even if the actual physical
port used is port 2). As such, we need to convert the port provided
by the VF to the physical port before calling into the firmware.

It turns out that the Linux mlx4 VF RoCE driver maintains a copy of
the GID table and hence this change became critical only for single
ported IB VFs, but it could be needed for other RoCE VF drivers too.

Fixes: 449fc48866f7 ('net/mlx4: Adapt code for N-Port VF')
Signed-off-by: Or Gerlitz <ogerlitz at mellanox.com>
Signed-off-by: Jack Morgenstein <jackm at dev.mellanox.co.il>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/ethernet/mellanox/mlx4/cmd.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 9842bf9..782bd10 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -725,7 +725,7 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
 {
 	struct ib_smp *smp = inbox->buf;
 	u32 index;
-	u8 port;
+	u8 port, slave_port;
 	u8 opcode_modifier;
 	u16 *table;
 	int err;
@@ -737,7 +737,8 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
 	__be32 slave_cap_mask;
 	__be64 slave_node_guid;
 
-	port = vhcr->in_modifier;
+	slave_port = vhcr->in_modifier;
+	port = mlx4_slave_convert_port(dev, slave, slave_port);
 
 	/* network-view bit is for driver use only, and should not be passed to FW */
 	opcode_modifier = vhcr->op_modifier & ~0x8; /* clear netw view bit */
@@ -771,8 +772,9 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
 			if (smp->attr_id == IB_SMP_ATTR_PORT_INFO) {
 				/*get the slave specific caps:*/
 				/*do the command */
+				smp->attr_mod = cpu_to_be32(port);
 				err = mlx4_cmd_box(dev, inbox->dma, outbox->dma,
-					    vhcr->in_modifier, opcode_modifier,
+					    port, opcode_modifier,
 					    vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
 				/* modify the response for slaves */
 				if (!err && slave != mlx4_master_func_num(dev)) {
@@ -803,7 +805,7 @@ static int mlx4_MAD_IFC_wrapper(struct mlx4_dev *dev, int slave,
 			}
 			if (smp->attr_id == IB_SMP_ATTR_NODE_INFO) {
 				err = mlx4_cmd_box(dev, inbox->dma, outbox->dma,
-					     vhcr->in_modifier, opcode_modifier,
+					     port, opcode_modifier,
 					     vhcr->op, MLX4_CMD_TIME_CLASS_C, MLX4_CMD_NATIVE);
 				if (!err) {
 					slave_node_guid =  mlx4_get_slave_node_guid(dev, slave);
-- 
1.9.1