#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/log2.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_NUM_PRIOS_SYM_NAME "_abi_pci_dscp_num_prio_%u"
#define NFP_NUM_BANDS_SYM_NAME "_abi_pci_dscp_num_band_%u"
#define NFP_ACT_MASK_SYM_NAME "_abi_nfd_out_q_actions_%u"
#define NFP_RED_SUPPORT_SYM_NAME "_abi_nfd_out_red_offload_%u"
#define NFP_QLVL_SYM_NAME "_abi_nfd_out_q_lvls_%u%s"
#define NFP_QLVL_STRIDE 16
#define NFP_QLVL_BLOG_BYTES 0
#define NFP_QLVL_BLOG_PKTS 4
#define NFP_QLVL_THRS 8
#define NFP_QLVL_ACT 12
#define NFP_QMSTAT_SYM_NAME "_abi_nfdqm%u_stats%s"
#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
#define NFP_Q_STAT_SYM_NAME "_abi_nfd_rxq_stats%u%s"
#define NFP_Q_STAT_STRIDE 16
#define NFP_Q_STAT_PKTS 0
#define NFP_Q_STAT_BYTES 8
#define NFP_NET_ABM_MBOX_CMD NFP_NET_CFG_MBOX_SIMPLE_CMD
#define NFP_NET_ABM_MBOX_RET NFP_NET_CFG_MBOX_SIMPLE_RET
#define NFP_NET_ABM_MBOX_DATALEN NFP_NET_CFG_MBOX_SIMPLE_VAL
#define NFP_NET_ABM_MBOX_RESERVED (NFP_NET_CFG_MBOX_SIMPLE_VAL + 4)
#define NFP_NET_ABM_MBOX_DATA (NFP_NET_CFG_MBOX_SIMPLE_VAL + 8)
static int
nfp_abm_ctrl_stat(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
unsigned int stride, unsigned int offset, unsigned int band,
unsigned int queue, bool is_u64, u64 *res)
{
struct nfp_cpp *cpp = alink->abm->app->cpp;
u64 val, sym_offset;
unsigned int qid;
u32 val32;
int err;
qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
sym_offset = qid * 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 band %d queue %d (+ %d)\n",
alink->id, band, queue, alink->queue_base);
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 band,
unsigned int queue, u32 val)
{
unsigned int threshold;
threshold = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
return __nfp_abm_ctrl_set_q_lvl(alink->abm, threshold, val);
}
int __nfp_abm_ctrl_set_q_act(struct nfp_abm *abm, unsigned int id,
enum nfp_abm_q_action act)
{
struct nfp_cpp *cpp = abm->app->cpp;
u64 sym_offset;
int err;
if (abm->actions[id] == act)
return 0;
sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_ACT;
err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, act);
if (err) {
nfp_err(cpp,
"RED offload setting action failed on subqueue %d\n",
id);
return err;
}
abm->actions[id] = act;
return 0;
}
int nfp_abm_ctrl_set_q_act(struct nfp_abm_link *alink, unsigned int band,
unsigned int queue, enum nfp_abm_q_action act)
{
unsigned int qid;
qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
return __nfp_abm_ctrl_set_q_act(alink->abm, qid, act);
}
u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int queue)
{
unsigned int band;
u64 val, sum = 0;
for (band = 0; band < alink->abm->num_bands; band++) {
if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_NON_STO,
band, queue, true, &val))
return 0;
sum += val;
}
return sum;
}
u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int queue)
{
unsigned int band;
u64 val, sum = 0;
for (band = 0; band < alink->abm->num_bands; band++) {
if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_STO,
band, queue, true, &val))
return 0;
sum += val;
}
return sum;
}
static int
nfp_abm_ctrl_stat_basic(struct nfp_abm_link *alink, unsigned int band,
unsigned int queue, unsigned int off, u64 *val)
{
if (!nfp_abm_has_prio(alink->abm)) {
if (!band) {
unsigned int id = alink->queue_base + queue;
*val = nn_readq(alink->vnic,
NFP_NET_CFG_RXR_STATS(id) + off);
} else {
*val = 0;
}
return 0;
} else {
return nfp_abm_ctrl_stat(alink, alink->abm->q_stats,
NFP_Q_STAT_STRIDE, off, band, queue,
true, val);
}
}
int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int band,
unsigned int queue, struct nfp_alink_stats *stats)
{
int err;
err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_PKTS,
&stats->tx_pkts);
if (err)
return err;
err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_BYTES,
&stats->tx_bytes);
if (err)
return err;
err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls, NFP_QLVL_STRIDE,
NFP_QLVL_BLOG_BYTES, band, queue, 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,
band, queue, false, &stats->backlog_pkts);
if (err)
return err;
err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
band, queue, true, &stats->drops);
if (err)
return err;
return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
band, queue, true, &stats->overlimits);
}
int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink,
unsigned int band, unsigned int queue,
struct nfp_alink_xstats *xstats)
{
int err;
err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
band, queue, true, &xstats->pdrop);
if (err)
return err;
return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
band, queue, 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);
}
int nfp_abm_ctrl_prio_map_update(struct nfp_abm_link *alink, u32 *packed)
{
const u32 cmd = NFP_NET_CFG_MBOX_CMD_PCI_DSCP_PRIOMAP_SET;
struct nfp_net *nn = alink->vnic;
unsigned int i;
int err;
err = nfp_net_mbox_lock(nn, alink->abm->prio_map_len);
if (err)
return err;
nn_writeq(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATALEN,
alink->abm->prio_map_len);
for (i = 0; i < alink->abm->prio_map_len; i += sizeof(u32))
nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATA + i,
packed[i / sizeof(u32)]);
err = nfp_net_mbox_reconfig_and_unlock(nn, cmd);
if (err)
nfp_err(alink->abm->app->cpp,
"setting DSCP -> VQ map failed with error %d\n", err);
return err;
}
static int nfp_abm_ctrl_prio_check_params(struct nfp_abm_link *alink)
{
struct nfp_abm *abm = alink->abm;
struct nfp_net *nn = alink->vnic;
unsigned int min_mbox_sz;
if (!nfp_abm_has_prio(alink->abm))
return 0;
min_mbox_sz = NFP_NET_ABM_MBOX_DATA + alink->abm->prio_map_len;
if (nn->tlv_caps.mbox_len < min_mbox_sz) {
nfp_err(abm->app->pf->cpp, "vNIC mailbox too small for prio offload: %u, need: %u\n",
nn->tlv_caps.mbox_len, min_mbox_sz);
return -EINVAL;
}
return 0;
}
int 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;
return nfp_abm_ctrl_prio_check_params(alink);
}
static unsigned int nfp_abm_ctrl_prio_map_size(struct nfp_abm *abm)
{
unsigned int size;
size = roundup_pow_of_two(order_base_2(abm->num_bands));
size = DIV_ROUND_UP(size * abm->num_prios, BITS_PER_BYTE);
size = round_up(size, sizeof(u32));
return size;
}
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_abm *abm, const char *name_fmt,
size_t size)
{
char pf_symbol[64];
size = array3_size(size, abm->num_bands, NFP_NET_MAX_RX_RINGS);
snprintf(pf_symbol, sizeof(pf_symbol), name_fmt,
abm->pf_id, nfp_abm_has_prio(abm) ? "_per_band" : "");
return nfp_abm_ctrl_find_rtsym(abm->app->pf, pf_symbol, size);
}
int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm)
{
struct nfp_pf *pf = abm->app->pf;
const struct nfp_rtsym *sym;
int res;
abm->pf_id = nfp_cppcore_pcie_unit(pf->cpp);
res = nfp_pf_rtsym_read_optional(pf, NFP_RED_SUPPORT_SYM_NAME, 1);
if (res < 0)
return res;
abm->red_support = res;
res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_BANDS_SYM_NAME, 1);
if (res < 0)
return res;
abm->num_bands = res;
res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_PRIOS_SYM_NAME, 1);
if (res < 0)
return res;
abm->num_prios = res;
res = nfp_pf_rtsym_read_optional(pf, NFP_ACT_MASK_SYM_NAME,
BIT(NFP_ABM_ACT_MARK_DROP));
if (res < 0)
return res;
abm->action_mask = res;
abm->prio_map_len = nfp_abm_ctrl_prio_map_size(abm);
abm->dscp_mask = GENMASK(7, 8 - order_base_2(abm->num_prios));
if (!is_power_of_2(abm->num_bands) || !is_power_of_2(abm->num_prios) ||
abm->num_bands > U16_MAX || abm->num_prios > U16_MAX ||
(abm->num_bands == 1) != (abm->num_prios == 1)) {
nfp_err(pf->cpp,
"invalid priomap description num bands: %u and num prios: %u\n",
abm->num_bands, abm->num_prios);
return -EINVAL;
}
if (!abm->red_support)
return 0;
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QLVL_SYM_NAME,
NFP_QLVL_STRIDE);
if (IS_ERR(sym))
return PTR_ERR(sym);
abm->q_lvls = sym;
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QMSTAT_SYM_NAME,
NFP_QMSTAT_STRIDE);
if (IS_ERR(sym))
return PTR_ERR(sym);
abm->qm_stats = sym;
if (nfp_abm_has_prio(abm)) {
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_Q_STAT_SYM_NAME,
NFP_Q_STAT_STRIDE);
if (IS_ERR(sym))
return PTR_ERR(sym);
abm->q_stats = sym;
}
return 0;
}
