vport.c

 1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
 2/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
 3
 4#include "internal.h"
 5
 6int mlx5hws_vport_init_vports(struct mlx5hws_context *ctx)
 7{
 8	int ret;
 9
10	if (!ctx->caps->eswitch_manager)
11		return 0;
12
13	xa_init(&ctx->vports.vport_gvmi_xa);
14
15	/* Set gvmi for eswitch manager and uplink vports only. Rest of the vports
16	 * (vport 0 of other function, VFs and SFs) will be queried dynamically.
17	 */
18
19	ret = mlx5hws_cmd_query_gvmi(ctx->mdev, false, 0, &ctx->vports.esw_manager_gvmi);
20	if (ret)
21		return ret;
22
23	ctx->vports.uplink_gvmi = 0;
24	return 0;
25}
26
27void mlx5hws_vport_uninit_vports(struct mlx5hws_context *ctx)
28{
29	if (ctx->caps->eswitch_manager)
30		xa_destroy(&ctx->vports.vport_gvmi_xa);
31}
32
33static int hws_vport_add_gvmi(struct mlx5hws_context *ctx, u16 vport)
34{
35	u16 vport_gvmi;
36	int ret;
37
38	ret = mlx5hws_cmd_query_gvmi(ctx->mdev, true, vport, &vport_gvmi);
39	if (ret)
40		return -EINVAL;
41
42	ret = xa_insert(&ctx->vports.vport_gvmi_xa, vport,
43			xa_mk_value(vport_gvmi), GFP_KERNEL);
44	if (ret)
45		mlx5hws_dbg(ctx, "Couldn't insert new vport gvmi into xarray (%d)\n", ret);
46
47	return ret;
48}
49
50static bool hws_vport_is_esw_mgr_vport(struct mlx5hws_context *ctx, u16 vport)
51{
52	return ctx->caps->is_ecpf ? vport == MLX5_VPORT_ECPF :
53				    vport == MLX5_VPORT_PF;
54}
55
56int mlx5hws_vport_get_gvmi(struct mlx5hws_context *ctx, u16 vport, u16 *vport_gvmi)
57{
58	void *entry;
59	int ret;
60
61	if (!ctx->caps->eswitch_manager)
62		return -EINVAL;
63
64	if (hws_vport_is_esw_mgr_vport(ctx, vport)) {
65		*vport_gvmi = ctx->vports.esw_manager_gvmi;
66		return 0;
67	}
68
69	if (vport == MLX5_VPORT_UPLINK) {
70		*vport_gvmi = ctx->vports.uplink_gvmi;
71		return 0;
72	}
73
74load_entry:
75	entry = xa_load(&ctx->vports.vport_gvmi_xa, vport);
76
77	if (!xa_is_value(entry)) {
78		ret = hws_vport_add_gvmi(ctx, vport);
79		if (ret && ret != -EBUSY)
80			return ret;
81		goto load_entry;
82	}
83
84	*vport_gvmi = (u16)xa_to_value(entry);
85	return 0;
86}