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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */
#include <linux/kernel.h>
#include "../nfpcore/nfp_cpp.h"
#include "../nfpcore/nfp_nffw.h"
#include "../nfp_app.h"
#include "../nfp_abi.h"
#include "../nfp_main.h"
#include "../nfp_net.h"
#include "main.h"
#define NFP_QLVL_SYM_NAME "_abi_nfd_out_q_lvls_%u"
#define NFP_QLVL_STRIDE 16
#define NFP_QLVL_BLOG_BYTES 0
#define NFP_QLVL_BLOG_PKTS 4
#define NFP_QLVL_THRS 8
#define NFP_QMSTAT_SYM_NAME "_abi_nfdqm%u_stats"
#define NFP_QMSTAT_STRIDE 32
#define NFP_QMSTAT_NON_STO 0
#define NFP_QMSTAT_STO 8
#define NFP_QMSTAT_DROP 16
#define NFP_QMSTAT_ECN 24
static int
nfp_abm_ctrl_stat(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
unsigned int stride, unsigned int offset, unsigned int i,
bool is_u64, u64 *res)
{
struct nfp_cpp *cpp = alink->abm->app->cpp;
u64 val, sym_offset;
u32 val32;
int err;
sym_offset = (alink->queue_base + i) * stride + offset;
if (is_u64)
err = __nfp_rtsym_readq(cpp, sym, 3, 0, sym_offset, &val);
else
err = __nfp_rtsym_readl(cpp, sym, 3, 0, sym_offset, &val32);
if (err) {
nfp_err(cpp,
"RED offload reading stat failed on vNIC %d queue %d\n",
alink->id, i);
return err;
}
*res = is_u64 ? val : val32;
return 0;
}
int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val)
{
struct nfp_cpp *cpp = abm->app->cpp;
u64 sym_offset;
int err;
__clear_bit(id, abm->threshold_undef);
if (abm->thresholds[id] == val)
return 0;
sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_THRS;
err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, val);
if (err) {
nfp_err(cpp,
"RED offload setting level failed on subqueue %d\n",
id);
return err;
}
abm->thresholds[id] = val;
return 0;
}
int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int queue,
u32 val)
{
unsigned int threshold;
threshold = alink->queue_base + queue;
return __nfp_abm_ctrl_set_q_lvl(alink->abm, threshold, val);
}
u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i)
{
u64 val;
if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats, NFP_QMSTAT_STRIDE,
NFP_QMSTAT_NON_STO, i, true, &val))
return 0;
return val;
}
u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i)
{
u64 val;
if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats, NFP_QMSTAT_STRIDE,
NFP_QMSTAT_STO, i, true, &val))
return 0;
return val;
}
int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int i,
struct nfp_alink_stats *stats)
{
int err;
stats->tx_pkts = nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i));
stats->tx_bytes = nn_readq(alink->vnic, NFP_NET_CFG_RXR_STATS(i) + 8);
err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls,
NFP_QLVL_STRIDE, NFP_QLVL_BLOG_BYTES,
i, false, &stats->backlog_bytes);
if (err)
return err;
err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls,
NFP_QLVL_STRIDE, NFP_QLVL_BLOG_PKTS,
i, false, &stats->backlog_pkts);
if (err)
return err;
err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
i, true, &stats->drops);
if (err)
return err;
return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
i, true, &stats->overlimits);
}
int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, unsigned int i,
struct nfp_alink_xstats *xstats)
{
int err;
err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
i, true, &xstats->pdrop);
if (err)
return err;
return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
i, true, &xstats->ecn_marked);
}
int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm)
{
return nfp_mbox_cmd(abm->app->pf, NFP_MBOX_PCIE_ABM_ENABLE,
NULL, 0, NULL, 0);
}
int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm)
{
return nfp_mbox_cmd(abm->app->pf, NFP_MBOX_PCIE_ABM_DISABLE,
NULL, 0, NULL, 0);
}
void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink)
{
alink->queue_base = nn_readl(alink->vnic, NFP_NET_CFG_START_RXQ);
alink->queue_base /= alink->vnic->stride_rx;
}
static const struct nfp_rtsym *
nfp_abm_ctrl_find_rtsym(struct nfp_pf *pf, const char *name, unsigned int size)
{
const struct nfp_rtsym *sym;
sym = nfp_rtsym_lookup(pf->rtbl, name);
if (!sym) {
nfp_err(pf->cpp, "Symbol '%s' not found\n", name);
return ERR_PTR(-ENOENT);
}
if (nfp_rtsym_size(sym) != size) {
nfp_err(pf->cpp,
"Symbol '%s' wrong size: expected %u got %llu\n",
name, size, nfp_rtsym_size(sym));
return ERR_PTR(-EINVAL);
}
return sym;
}
static const struct nfp_rtsym *
nfp_abm_ctrl_find_q_rtsym(struct nfp_pf *pf, const char *name,
unsigned int size)
{
return nfp_abm_ctrl_find_rtsym(pf, name, size * NFP_NET_MAX_RX_RINGS);
}
int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm)
{
struct nfp_pf *pf = abm->app->pf;
const struct nfp_rtsym *sym;
unsigned int pf_id;
char pf_symbol[64];
pf_id = nfp_cppcore_pcie_unit(pf->cpp);
abm->pf_id = pf_id;
snprintf(pf_symbol, sizeof(pf_symbol), NFP_QLVL_SYM_NAME, pf_id);
sym = nfp_abm_ctrl_find_q_rtsym(pf, pf_symbol, NFP_QLVL_STRIDE);
if (IS_ERR(sym))
return PTR_ERR(sym);
abm->q_lvls = sym;
snprintf(pf_symbol, sizeof(pf_symbol), NFP_QMSTAT_SYM_NAME, pf_id);
sym = nfp_abm_ctrl_find_q_rtsym(pf, pf_symbol, NFP_QMSTAT_STRIDE);
if (IS_ERR(sym))
return PTR_ERR(sym);
abm->qm_stats = sym;
return 0;
}
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