1// SPDX-License-Identifier: GPL-2.0
2/* Marvell RVU PF/VF Netdev Devlink
3 *
4 * Copyright (C) 2021 Marvell.
5 */
6
7#include "otx2_common.h"
8
9/* Devlink Params APIs */
10static int otx2_dl_mcam_count_validate(struct devlink *devlink, u32 id,
11 union devlink_param_value val,
12 struct netlink_ext_ack *extack)
13{
14 struct otx2_devlink *otx2_dl = devlink_priv(devlink);
15 struct otx2_nic *pfvf = otx2_dl->pfvf;
16 struct otx2_flow_config *flow_cfg;
17
18 if (!pfvf->flow_cfg) {
19 NL_SET_ERR_MSG_MOD(extack,
20 "pfvf->flow_cfg not initialized");
21 return -EINVAL;
22 }
23
24 flow_cfg = pfvf->flow_cfg;
25 if (flow_cfg && flow_cfg->nr_flows) {
26 NL_SET_ERR_MSG_MOD(extack,
27 "Cannot modify count when there are active rules");
28 return -EINVAL;
29 }
30
31 return 0;
32}
33
34static int otx2_dl_mcam_count_set(struct devlink *devlink, u32 id,
35 struct devlink_param_gset_ctx *ctx)
36{
37 struct otx2_devlink *otx2_dl = devlink_priv(devlink);
38 struct otx2_nic *pfvf = otx2_dl->pfvf;
39
40 if (!pfvf->flow_cfg)
41 return 0;
42
43 otx2_alloc_mcam_entries(pfvf, count: ctx->val.vu16);
44
45 return 0;
46}
47
48static int otx2_dl_mcam_count_get(struct devlink *devlink, u32 id,
49 struct devlink_param_gset_ctx *ctx)
50{
51 struct otx2_devlink *otx2_dl = devlink_priv(devlink);
52 struct otx2_nic *pfvf = otx2_dl->pfvf;
53 struct otx2_flow_config *flow_cfg;
54
55 if (!pfvf->flow_cfg) {
56 ctx->val.vu16 = 0;
57 return 0;
58 }
59
60 flow_cfg = pfvf->flow_cfg;
61 ctx->val.vu16 = flow_cfg->max_flows;
62
63 return 0;
64}
65
66enum otx2_dl_param_id {
67 OTX2_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
68 OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
69};
70
71static const struct devlink_param otx2_dl_params[] = {
72 DEVLINK_PARAM_DRIVER(OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
73 "mcam_count", DEVLINK_PARAM_TYPE_U16,
74 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
75 otx2_dl_mcam_count_get, otx2_dl_mcam_count_set,
76 otx2_dl_mcam_count_validate),
77};
78
79static const struct devlink_ops otx2_devlink_ops = {
80};
81
82int otx2_register_dl(struct otx2_nic *pfvf)
83{
84 struct otx2_devlink *otx2_dl;
85 struct devlink *dl;
86 int err;
87
88 dl = devlink_alloc(ops: &otx2_devlink_ops,
89 priv_size: sizeof(struct otx2_devlink), dev: pfvf->dev);
90 if (!dl) {
91 dev_warn(pfvf->dev, "devlink_alloc failed\n");
92 return -ENOMEM;
93 }
94
95 otx2_dl = devlink_priv(devlink: dl);
96 otx2_dl->dl = dl;
97 otx2_dl->pfvf = pfvf;
98 pfvf->dl = otx2_dl;
99
100 err = devlink_params_register(devlink: dl, params: otx2_dl_params,
101 ARRAY_SIZE(otx2_dl_params));
102 if (err) {
103 dev_err(pfvf->dev,
104 "devlink params register failed with error %d", err);
105 goto err_dl;
106 }
107
108 devlink_register(devlink: dl);
109 return 0;
110
111err_dl:
112 devlink_free(devlink: dl);
113 return err;
114}
115
116void otx2_unregister_dl(struct otx2_nic *pfvf)
117{
118 struct otx2_devlink *otx2_dl = pfvf->dl;
119 struct devlink *dl = otx2_dl->dl;
120
121 devlink_unregister(devlink: dl);
122 devlink_params_unregister(devlink: dl, params: otx2_dl_params,
123 ARRAY_SIZE(otx2_dl_params));
124 devlink_free(devlink: dl);
125}
126

source code of linux/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c