1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
 2/* Copyright (c) 2019 Mellanox Technologies. */
 3
 4#include "ecpf.h"
 5
 6bool mlx5_read_embedded_cpu(struct mlx5_core_dev *dev)
 7{
 8	return (ioread32be(&dev->iseg->initializing) >> MLX5_ECPU_BIT_NUM) & 1;
 9}
10
11static 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
20int 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
31int 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
42static 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
59static 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
73int 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
81void 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}