net/mlx4_core: Add basic support for QP max-rate limiting
Add the low-level device commands and definitions used for QP max-rate limiting.
This is done through the following elements:
- read rate-limit device caps in QUERY_DEV_CAP: number of different
rates and the min/max rates in Kbs/Mbs/Gbs units
- enhance the QP context struct to contain rate limit units and value
- allow to do run time rate-limit setting to QPs through the
update-qp firmware command
- QP rate-limiting is disallowed for VFs
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index d43e259..c258f86 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -2947,8 +2947,12 @@
qp_type = (be32_to_cpu(qp_ctx->flags) >> 16) & 0xff;
optpar = be32_to_cpu(*(__be32 *) inbox->buf);
- if (slave != mlx4_master_func_num(dev))
+ if (slave != mlx4_master_func_num(dev)) {
qp_ctx->params2 &= ~MLX4_QP_BIT_FPP;
+ /* setting QP rate-limit is disallowed for VFs */
+ if (qp_ctx->rate_limit_params)
+ return -EPERM;
+ }
switch (qp_type) {
case MLX4_QP_ST_RC: