1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
3
4 #include "mlx5hws_internal.h"
5
mlx5hws_vport_init_vports(struct mlx5hws_context * ctx)6 int 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
mlx5hws_vport_uninit_vports(struct mlx5hws_context * ctx)27 void 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
hws_vport_add_gvmi(struct mlx5hws_context * ctx,u16 vport)33 static 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
hws_vport_is_esw_mgr_vport(struct mlx5hws_context * ctx,u16 vport)50 static 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
mlx5hws_vport_get_gvmi(struct mlx5hws_context * ctx,u16 vport,u16 * vport_gvmi)56 int 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
74 load_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 }
87