When ECPF eswitch manager is at offloads mode, it monitors functions changed event from host PF side and acts according to the number of VFs enabled/disabled. As ECPF and host PF work in two independent hosts, it's possible that host PF OS reboots but ECPF system is still kept on and continues monitoring events from host PF. When kernel from host PF side is booting, PCI iov driver does sriov_init and compute_max_vf_buses by iterating over all valid num of VFs. This triggers FLR and generates functions changed events, even though host PF HCA is not enabled at this time. However, ECPF is not aware of this information, and still handles these events as usual. ECPF system will see massive number of reps are created, but destroyed immediately once creation finished. To eliminate this noise, a bit is added to host parameter context to indicate host PF is disabled. ECPF will not handle the VF changed event if this bit is set.
Unified · Split
| @@ -2026,6 +2026,7 @@ static void esw_functions_changed_event_handler(struct work_struct *work) · 2025 unmodified lines | |||
| 2026 | u32 out[MLX5_ST_SZ_DW(query_esw_functions_out)] = {}; | 2026 | u32 out[MLX5_ST_SZ_DW(query_esw_functions_out)] = {}; |
| 2027 | struct mlx5_host_work *host_work; | 2027 | struct mlx5_host_work *host_work; |
| 2028 | struct mlx5_eswitch *esw; | 2028 | struct mlx5_eswitch *esw; |
| 2029 | bool host_pf_disabled; | ||
| 2029 | u16 num_vfs = 0; | 2030 | u16 num_vfs = 0; |
| 2030 | int err; | 2031 | int err; |
| 2031 | 2032 | ||
| @@ -2035,7 +2036,9 @@ static void esw_functions_changed_event_handler(struct work_struct *work) · 3 unmodified lines | |||
| 2035 | err = mlx5_esw_query_functions(esw->dev, out, sizeof(out)); | 2036 | err = mlx5_esw_query_functions(esw->dev, out, sizeof(out)); |
| 2036 | num_vfs = MLX5_GET(query_esw_functions_out, out, | 2037 | num_vfs = MLX5_GET(query_esw_functions_out, out, |
| 2037 | host_params_context.host_num_of_vfs); | 2038 | host_params_context.host_num_of_vfs); |
| 2038 | if (err || num_vfs == esw->esw_funcs.num_vfs) | 2039 | host_pf_disabled = MLX5_GET(query_esw_functions_out, out, |
| 2040 | host_params_context.host_pf_disabled); | ||
| 2041 | if (err || host_pf_disabled || num_vfs == esw->esw_funcs.num_vfs) | ||
| 2039 | goto out; | 2042 | goto out; |
| 2040 | 2043 | ||
| 2041 | /* Number of VFs can only change from "0 to x" or "x to 0". */ | 2044 | /* Number of VFs can only change from "0 to x" or "x to 0". */ |
| @@ -9823,7 +9823,8 @@ struct mlx5_ifc_mtrc_ctrl_bits { · 9822 unmodified lines | |||
| 9823 | 9823 | ||
| 9824 | struct mlx5_ifc_host_params_context_bits { | 9824 | struct mlx5_ifc_host_params_context_bits { |
| 9825 | u8 host_number[0x8]; | 9825 | u8 host_number[0x8]; |
| 9826 | u8 reserved_at_8[0x8]; | 9826 | u8 reserved_at_8[0x7]; |
| 9827 | u8 host_pf_disabled[0x1]; | ||
| 9827 | u8 host_num_of_vfs[0x10]; | 9828 | u8 host_num_of_vfs[0x10]; |
| 9828 | 9829 | ||
| 9829 | u8 host_total_vfs[0x10]; | 9830 | u8 host_total_vfs[0x10]; |