1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* Copyright (c) 2019 Mellanox Technologies. */ 3 4 #include "ecpf.h" 5 6 bool mlx5_read_embedded_cpu(struct mlx5_core_dev *dev) 7 { 8 return (ioread32be(&dev->iseg->initializing) >> MLX5_ECPU_BIT_NUM) & 1; 9 } 10 11 static bool mlx5_ecpf_esw_admins_host_pf(const struct mlx5_core_dev *dev) 12 { 13 /* In separate host mode, PF enables itself. 14 * When ECPF is eswitch manager, eswitch enables host PF after 15 * eswitch is setup. 16 */ 17 return mlx5_core_is_ecpf_esw_manager(dev); 18 } 19 20 int mlx5_cmd_host_pf_enable_hca(struct mlx5_core_dev *dev) 21 { 22 u32 out[MLX5_ST_SZ_DW(enable_hca_out)] = {}; 23 u32 in[MLX5_ST_SZ_DW(enable_hca_in)] = {}; 24 25 MLX5_SET(enable_hca_in, in, opcode, MLX5_CMD_OP_ENABLE_HCA); 26 MLX5_SET(enable_hca_in, in, function_id, 0); 27 MLX5_SET(enable_hca_in, in, embedded_cpu_function, 0); 28 return mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); 29 } 30 31 int mlx5_cmd_host_pf_disable_hca(struct mlx5_core_dev *dev) 32 { 33 u32 out[MLX5_ST_SZ_DW(disable_hca_out)] = {}; 34 u32 in[MLX5_ST_SZ_DW(disable_hca_in)] = {}; 35 36 MLX5_SET(disable_hca_in, in, opcode, MLX5_CMD_OP_DISABLE_HCA); 37 MLX5_SET(disable_hca_in, in, function_id, 0); 38 MLX5_SET(disable_hca_in, in, embedded_cpu_function, 0); 39 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); 40 } 41 42 static int mlx5_host_pf_init(struct mlx5_core_dev *dev) 43 { 44 int err; 45 46 if (mlx5_ecpf_esw_admins_host_pf(dev)) 47 return 0; 48 49 /* ECPF shall enable HCA for host PF in the same way a PF 50 * does this for its VFs when ECPF is not a eswitch manager. 51 */ 52 err = mlx5_cmd_host_pf_enable_hca(dev); 53 if (err) 54 mlx5_core_err(dev, "Failed to enable external host PF HCA err(%d)\n", err); 55 56 return err; 57 } 58 59 static void mlx5_host_pf_cleanup(struct mlx5_core_dev *dev) 60 { 61 int err; 62 63 if (mlx5_ecpf_esw_admins_host_pf(dev)) 64 return; 65 66 err = mlx5_cmd_host_pf_disable_hca(dev); 67 if (err) { 68 mlx5_core_err(dev, "Failed to disable external host PF HCA err(%d)\n", err); 69 return; 70 } 71 } 72 73 int mlx5_ec_init(struct mlx5_core_dev *dev) 74 { 75 if (!mlx5_core_is_ecpf(dev)) 76 return 0; 77 78 return mlx5_host_pf_init(dev); 79 } 80 81 void mlx5_ec_cleanup(struct mlx5_core_dev *dev) 82 { 83 int err; 84 85 if (!mlx5_core_is_ecpf(dev)) 86 return; 87 88 mlx5_host_pf_cleanup(dev); 89 90 err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_HOST_PF]); 91 if (err) 92 mlx5_core_warn(dev, "Timeout reclaiming external host PF pages err(%d)\n", err); 93 94 err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_VF]); 95 if (err) 96 mlx5_core_warn(dev, "Timeout reclaiming external host VFs pages err(%d)\n", err); 97 } 98