1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /* Copyright (c) 2019 Mellanox Technologies. */
3
4 #include "ecpf.h"
5
mlx5_read_embedded_cpu(struct mlx5_core_dev * dev)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
mlx5_peer_pf_enable_hca(struct mlx5_core_dev * dev)11 static int mlx5_peer_pf_enable_hca(struct mlx5_core_dev *dev)
12 {
13 u32 out[MLX5_ST_SZ_DW(enable_hca_out)] = {};
14 u32 in[MLX5_ST_SZ_DW(enable_hca_in)] = {};
15
16 MLX5_SET(enable_hca_in, in, opcode, MLX5_CMD_OP_ENABLE_HCA);
17 MLX5_SET(enable_hca_in, in, function_id, 0);
18 MLX5_SET(enable_hca_in, in, embedded_cpu_function, 0);
19 return mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
20 }
21
mlx5_peer_pf_disable_hca(struct mlx5_core_dev * dev)22 static int mlx5_peer_pf_disable_hca(struct mlx5_core_dev *dev)
23 {
24 u32 out[MLX5_ST_SZ_DW(disable_hca_out)] = {};
25 u32 in[MLX5_ST_SZ_DW(disable_hca_in)] = {};
26
27 MLX5_SET(disable_hca_in, in, opcode, MLX5_CMD_OP_DISABLE_HCA);
28 MLX5_SET(disable_hca_in, in, function_id, 0);
29 MLX5_SET(disable_hca_in, in, embedded_cpu_function, 0);
30 return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
31 }
32
mlx5_peer_pf_init(struct mlx5_core_dev * dev)33 static int mlx5_peer_pf_init(struct mlx5_core_dev *dev)
34 {
35 int err;
36
37 err = mlx5_peer_pf_enable_hca(dev);
38 if (err)
39 mlx5_core_err(dev, "Failed to enable peer PF HCA err(%d)\n",
40 err);
41
42 return err;
43 }
44
mlx5_peer_pf_cleanup(struct mlx5_core_dev * dev)45 static void mlx5_peer_pf_cleanup(struct mlx5_core_dev *dev)
46 {
47 int err;
48
49 err = mlx5_peer_pf_disable_hca(dev);
50 if (err) {
51 mlx5_core_err(dev, "Failed to disable peer PF HCA err(%d)\n",
52 err);
53 return;
54 }
55
56 err = mlx5_wait_for_pages(dev, &dev->priv.peer_pf_pages);
57 if (err)
58 mlx5_core_warn(dev, "Timeout reclaiming peer PF pages err(%d)\n",
59 err);
60 }
61
mlx5_ec_init(struct mlx5_core_dev * dev)62 int mlx5_ec_init(struct mlx5_core_dev *dev)
63 {
64 int err = 0;
65
66 if (!mlx5_core_is_ecpf(dev))
67 return 0;
68
69 /* ECPF shall enable HCA for peer PF in the same way a PF
70 * does this for its VFs.
71 */
72 err = mlx5_peer_pf_init(dev);
73 if (err)
74 return err;
75
76 return 0;
77 }
78
mlx5_ec_cleanup(struct mlx5_core_dev * dev)79 void mlx5_ec_cleanup(struct mlx5_core_dev *dev)
80 {
81 if (!mlx5_core_is_ecpf(dev))
82 return;
83
84 mlx5_peer_pf_cleanup(dev);
85 }
86
