octeontx2/nic/otx2_devlink.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Marvell RVU PF/VF Netdev Devlink
0003  *
0004  * Copyright (C) 2021 Marvell.
0005  */
0006
0007 #include "otx2_common.h"
0008
0009 /* Devlink Params APIs */
0010 static int otx2_dl_mcam_count_validate(struct devlink *devlink, u32 id,
0011                        union devlink_param_value val,
0012                        struct netlink_ext_ack *extack)
0013 {
0014     struct otx2_devlink *otx2_dl = devlink_priv(devlink);
0015     struct otx2_nic *pfvf = otx2_dl->pfvf;
0016     struct otx2_flow_config *flow_cfg;
0017
0018     if (!pfvf->flow_cfg) {
0019         NL_SET_ERR_MSG_MOD(extack,
0020                    "pfvf->flow_cfg not initialized");
0021         return -EINVAL;
0022     }
0023
0024     flow_cfg = pfvf->flow_cfg;
0025     if (flow_cfg && flow_cfg->nr_flows) {
0026         NL_SET_ERR_MSG_MOD(extack,
0027                    "Cannot modify count when there are active rules");
0028         return -EINVAL;
0029     }
0030
0031     return 0;
0032 }
0033
0034 static int otx2_dl_mcam_count_set(struct devlink *devlink, u32 id,
0035                   struct devlink_param_gset_ctx *ctx)
0036 {
0037     struct otx2_devlink *otx2_dl = devlink_priv(devlink);
0038     struct otx2_nic *pfvf = otx2_dl->pfvf;
0039
0040     if (!pfvf->flow_cfg)
0041         return 0;
0042
0043     otx2_alloc_mcam_entries(pfvf, ctx->val.vu16);
0044     otx2_tc_alloc_ent_bitmap(pfvf);
0045
0046     return 0;
0047 }
0048
0049 static int otx2_dl_mcam_count_get(struct devlink *devlink, u32 id,
0050                   struct devlink_param_gset_ctx *ctx)
0051 {
0052     struct otx2_devlink *otx2_dl = devlink_priv(devlink);
0053     struct otx2_nic *pfvf = otx2_dl->pfvf;
0054     struct otx2_flow_config *flow_cfg;
0055
0056     if (!pfvf->flow_cfg) {
0057         ctx->val.vu16 = 0;
0058         return 0;
0059     }
0060
0061     flow_cfg = pfvf->flow_cfg;
0062     ctx->val.vu16 = flow_cfg->max_flows;
0063
0064     return 0;
0065 }
0066
0067 enum otx2_dl_param_id {
0068     OTX2_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
0069     OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
0070 };
0071
0072 static const struct devlink_param otx2_dl_params[] = {
0073     DEVLINK_PARAM_DRIVER(OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
0074                  "mcam_count", DEVLINK_PARAM_TYPE_U16,
0075                  BIT(DEVLINK_PARAM_CMODE_RUNTIME),
0076                  otx2_dl_mcam_count_get, otx2_dl_mcam_count_set,
0077                  otx2_dl_mcam_count_validate),
0078 };
0079
0080 /* Devlink OPs */
0081 static int otx2_devlink_info_get(struct devlink *devlink,
0082                  struct devlink_info_req *req,
0083                  struct netlink_ext_ack *extack)
0084 {
0085     struct otx2_devlink *otx2_dl = devlink_priv(devlink);
0086     struct otx2_nic *pfvf = otx2_dl->pfvf;
0087
0088     if (is_otx2_vf(pfvf->pcifunc))
0089         return devlink_info_driver_name_put(req, "rvu_nicvf");
0090
0091     return devlink_info_driver_name_put(req, "rvu_nicpf");
0092 }
0093
0094 static const struct devlink_ops otx2_devlink_ops = {
0095     .info_get = otx2_devlink_info_get,
0096 };
0097
0098 int otx2_register_dl(struct otx2_nic *pfvf)
0099 {
0100     struct otx2_devlink *otx2_dl;
0101     struct devlink *dl;
0102     int err;
0103
0104     dl = devlink_alloc(&otx2_devlink_ops,
0105                sizeof(struct otx2_devlink), pfvf->dev);
0106     if (!dl) {
0107         dev_warn(pfvf->dev, "devlink_alloc failed\n");
0108         return -ENOMEM;
0109     }
0110
0111     otx2_dl = devlink_priv(dl);
0112     otx2_dl->dl = dl;
0113     otx2_dl->pfvf = pfvf;
0114     pfvf->dl = otx2_dl;
0115
0116     err = devlink_params_register(dl, otx2_dl_params,
0117                       ARRAY_SIZE(otx2_dl_params));
0118     if (err) {
0119         dev_err(pfvf->dev,
0120             "devlink params register failed with error %d", err);
0121         goto err_dl;
0122     }
0123
0124     devlink_register(dl);
0125     return 0;
0126
0127 err_dl:
0128     devlink_free(dl);
0129     return err;
0130 }
0131
0132 void otx2_unregister_dl(struct otx2_nic *pfvf)
0133 {
0134     struct otx2_devlink *otx2_dl = pfvf->dl;
0135     struct devlink *dl = otx2_dl->dl;
0136
0137     devlink_unregister(dl);
0138     devlink_params_unregister(dl, otx2_dl_params,
0139                   ARRAY_SIZE(otx2_dl_params));
0140     devlink_free(dl);
0141 }