cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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otx2_devlink.c (3295B)

      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, ctx->val.vu16);
     44	otx2_tc_alloc_ent_bitmap(pfvf);
     45
     46	return 0;
     47}
     48
     49static int otx2_dl_mcam_count_get(struct devlink *devlink, u32 id,
     50				  struct devlink_param_gset_ctx *ctx)
     51{
     52	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
     53	struct otx2_nic *pfvf = otx2_dl->pfvf;
     54	struct otx2_flow_config *flow_cfg;
     55
     56	if (!pfvf->flow_cfg) {
     57		ctx->val.vu16 = 0;
     58		return 0;
     59	}
     60
     61	flow_cfg = pfvf->flow_cfg;
     62	ctx->val.vu16 = flow_cfg->max_flows;
     63
     64	return 0;
     65}
     66
     67enum otx2_dl_param_id {
     68	OTX2_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
     69	OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
     70};
     71
     72static const struct devlink_param otx2_dl_params[] = {
     73	DEVLINK_PARAM_DRIVER(OTX2_DEVLINK_PARAM_ID_MCAM_COUNT,
     74			     "mcam_count", DEVLINK_PARAM_TYPE_U16,
     75			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
     76			     otx2_dl_mcam_count_get, otx2_dl_mcam_count_set,
     77			     otx2_dl_mcam_count_validate),
     78};
     79
     80/* Devlink OPs */
     81static int otx2_devlink_info_get(struct devlink *devlink,
     82				 struct devlink_info_req *req,
     83				 struct netlink_ext_ack *extack)
     84{
     85	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
     86	struct otx2_nic *pfvf = otx2_dl->pfvf;
     87
     88	if (is_otx2_vf(pfvf->pcifunc))
     89		return devlink_info_driver_name_put(req, "rvu_nicvf");
     90
     91	return devlink_info_driver_name_put(req, "rvu_nicpf");
     92}
     93
     94static const struct devlink_ops otx2_devlink_ops = {
     95	.info_get = otx2_devlink_info_get,
     96};
     97
     98int otx2_register_dl(struct otx2_nic *pfvf)
     99{
    100	struct otx2_devlink *otx2_dl;
    101	struct devlink *dl;
    102	int err;
    103
    104	dl = devlink_alloc(&otx2_devlink_ops,
    105			   sizeof(struct otx2_devlink), pfvf->dev);
    106	if (!dl) {
    107		dev_warn(pfvf->dev, "devlink_alloc failed\n");
    108		return -ENOMEM;
    109	}
    110
    111	otx2_dl = devlink_priv(dl);
    112	otx2_dl->dl = dl;
    113	otx2_dl->pfvf = pfvf;
    114	pfvf->dl = otx2_dl;
    115
    116	err = devlink_params_register(dl, otx2_dl_params,
    117				      ARRAY_SIZE(otx2_dl_params));
    118	if (err) {
    119		dev_err(pfvf->dev,
    120			"devlink params register failed with error %d", err);
    121		goto err_dl;
    122	}
    123
    124	devlink_register(dl);
    125	return 0;
    126
    127err_dl:
    128	devlink_free(dl);
    129	return err;
    130}
    131
    132void otx2_unregister_dl(struct otx2_nic *pfvf)
    133{
    134	struct otx2_devlink *otx2_dl = pfvf->dl;
    135	struct devlink *dl = otx2_dl->dl;
    136
    137	devlink_unregister(dl);
    138	devlink_params_unregister(dl, otx2_dl_params,
    139				  ARRAY_SIZE(otx2_dl_params));
    140	devlink_free(dl);
    141}