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Date: Fri, 25 May 2018 21:53:36 -0700
From: Jakub Kicinski <jakub.kicinski@...ronome.com>
To: davem@...emloft.net
Cc: jiri@...nulli.us, xiyou.wangcong@...il.com,
john.fastabend@...il.com, netdev@...r.kernel.org,
oss-drivers@...ronome.com, alexei.starovoitov@...il.com,
nogahf@...lanox.com, yuvalm@...lanox.com, gerlitz.or@...il.com,
Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 12/14] nfp: abm: multi-queue RED offload
Add support for MQ offload and setting RED parameters
on queue-by-queue basis.
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@...ronome.com>
---
drivers/net/ethernet/netronome/nfp/abm/ctrl.c | 50 ++++-
drivers/net/ethernet/netronome/nfp/abm/main.c | 192 ++++++++++++++----
drivers/net/ethernet/netronome/nfp/abm/main.h | 14 +-
3 files changed, 208 insertions(+), 48 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/abm/ctrl.c b/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
index 79fc9147c012..b157ccd8c80f 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
@@ -111,8 +111,7 @@ nfp_abm_ctrl_stat_all(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
return 0;
}
-static int
-nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int i, u32 val)
+int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int i, u32 val)
{
struct nfp_cpp *cpp = alink->abm->app->cpp;
u32 muw;
@@ -164,6 +163,37 @@ u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i)
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_stats(struct nfp_abm_link *alink,
struct nfp_alink_stats *stats)
{
@@ -200,6 +230,22 @@ int nfp_abm_ctrl_read_stats(struct nfp_abm_link *alink,
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_read_xstats(struct nfp_abm_link *alink,
struct nfp_alink_xstats *xstats)
{
diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.c b/drivers/net/ethernet/netronome/nfp/abm/main.c
index ef77d7b0d99d..21d5af1fb061 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.c
@@ -58,43 +58,77 @@ static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
FIELD_PREP(NFP_ABM_PORTID_ID, id);
}
-static int nfp_abm_reset_stats(struct nfp_abm_link *alink)
+static int
+__nfp_abm_reset_root(struct net_device *netdev, struct nfp_abm_link *alink,
+ u32 handle, unsigned int qs, u32 init_val)
{
- int err;
+ struct nfp_port *port = nfp_port_from_netdev(netdev);
+ int ret;
- err = nfp_abm_ctrl_read_stats(alink, &alink->qdiscs[0].stats);
- if (err)
- return err;
- alink->qdiscs[0].stats.backlog_pkts = 0;
- alink->qdiscs[0].stats.backlog_bytes = 0;
+ ret = nfp_abm_ctrl_set_all_q_lvls(alink, init_val);
+ memset(alink->qdiscs, 0, sizeof(*alink->qdiscs) * alink->num_qdiscs);
- err = nfp_abm_ctrl_read_xstats(alink, &alink->qdiscs[0].xstats);
- if (err)
- return err;
+ alink->parent = handle;
+ alink->num_qdiscs = qs;
+ port->tc_offload_cnt = qs;
- return 0;
+ return ret;
+}
+
+static void
+nfp_abm_reset_root(struct net_device *netdev, struct nfp_abm_link *alink,
+ u32 handle, unsigned int qs)
+{
+ __nfp_abm_reset_root(netdev, alink, handle, qs, ~0);
+}
+
+static int
+nfp_abm_red_find(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
+{
+ unsigned int i = TC_H_MIN(opt->parent) - 1;
+
+ if (opt->parent == TC_H_ROOT)
+ i = 0;
+ else if (TC_H_MAJ(alink->parent) == TC_H_MAJ(opt->parent))
+ i = TC_H_MIN(opt->parent) - 1;
+ else
+ return -EOPNOTSUPP;
+
+ if (i >= alink->num_qdiscs || opt->handle != alink->qdiscs[i].handle)
+ return -EOPNOTSUPP;
+
+ return i;
}
static void
nfp_abm_red_destroy(struct net_device *netdev, struct nfp_abm_link *alink,
u32 handle)
{
- struct nfp_port *port = nfp_port_from_netdev(netdev);
+ unsigned int i;
- if (handle != alink->qdiscs[0].handle)
+ for (i = 0; i < alink->num_qdiscs; i++)
+ if (handle == alink->qdiscs[i].handle)
+ break;
+ if (i == alink->num_qdiscs)
return;
- alink->qdiscs[0].handle = TC_H_UNSPEC;
- port->tc_offload_cnt = 0;
- nfp_abm_ctrl_set_all_q_lvls(alink, ~0);
+ if (alink->parent == TC_H_ROOT) {
+ nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 0);
+ } else {
+ nfp_abm_ctrl_set_q_lvl(alink, i, ~0);
+ memset(&alink->qdiscs[i], 0, sizeof(*alink->qdiscs));
+ }
}
static int
nfp_abm_red_replace(struct net_device *netdev, struct nfp_abm_link *alink,
struct tc_red_qopt_offload *opt)
{
- struct nfp_port *port = nfp_port_from_netdev(netdev);
- int err;
+ bool existing;
+ int i, err;
+
+ i = nfp_abm_red_find(alink, opt);
+ existing = i >= 0;
if (opt->set.min != opt->set.max || !opt->set.is_ecn) {
nfp_warn(alink->abm->app->cpp,
@@ -102,30 +136,62 @@ nfp_abm_red_replace(struct net_device *netdev, struct nfp_abm_link *alink,
err = -EINVAL;
goto err_destroy;
}
- err = nfp_abm_ctrl_set_all_q_lvls(alink, opt->set.min);
- if (err)
- goto err_destroy;
- /* Reset stats only on new qdisc */
- if (alink->qdiscs[0].handle != opt->handle) {
- err = nfp_abm_reset_stats(alink);
+ if (existing) {
+ if (alink->parent == TC_H_ROOT)
+ err = nfp_abm_ctrl_set_all_q_lvls(alink, opt->set.min);
+ else
+ err = nfp_abm_ctrl_set_q_lvl(alink, i, opt->set.min);
if (err)
goto err_destroy;
+ return 0;
}
- alink->qdiscs[0].handle = opt->handle;
- port->tc_offload_cnt = 1;
+ if (opt->parent == TC_H_ROOT) {
+ i = 0;
+ err = __nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 1,
+ opt->set.min);
+ } else if (TC_H_MAJ(alink->parent) == TC_H_MAJ(opt->parent)) {
+ i = TC_H_MIN(opt->parent) - 1;
+ err = nfp_abm_ctrl_set_q_lvl(alink, i, opt->set.min);
+ } else {
+ return -EINVAL;
+ }
+ /* Set the handle to try full clean up, in case IO failed */
+ alink->qdiscs[i].handle = opt->handle;
+ if (err)
+ goto err_destroy;
+
+ if (opt->parent == TC_H_ROOT)
+ err = nfp_abm_ctrl_read_stats(alink, &alink->qdiscs[i].stats);
+ else
+ err = nfp_abm_ctrl_read_q_stats(alink, i,
+ &alink->qdiscs[i].stats);
+ if (err)
+ goto err_destroy;
+
+ if (opt->parent == TC_H_ROOT)
+ err = nfp_abm_ctrl_read_xstats(alink,
+ &alink->qdiscs[i].xstats);
+ else
+ err = nfp_abm_ctrl_read_q_xstats(alink, i,
+ &alink->qdiscs[i].xstats);
+ if (err)
+ goto err_destroy;
+
+ alink->qdiscs[i].stats.backlog_pkts = 0;
+ alink->qdiscs[i].stats.backlog_bytes = 0;
return 0;
err_destroy:
/* If the qdisc keeps on living, but we can't offload undo changes */
- if (alink->qdiscs[0].handle == opt->handle) {
- opt->set.qstats->qlen -= alink->qdiscs[0].stats.backlog_pkts;
+ if (existing) {
+ opt->set.qstats->qlen -= alink->qdiscs[i].stats.backlog_pkts;
opt->set.qstats->backlog -=
- alink->qdiscs[0].stats.backlog_bytes;
+ alink->qdiscs[i].stats.backlog_bytes;
}
- if (alink->qdiscs[0].handle != TC_H_UNSPEC)
- nfp_abm_red_destroy(netdev, alink, alink->qdiscs[0].handle);
+ nfp_abm_red_destroy(netdev, alink, opt->handle);
+
return err;
}
@@ -146,13 +212,17 @@ nfp_abm_red_stats(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
{
struct nfp_alink_stats *prev_stats;
struct nfp_alink_stats stats;
- int err;
+ int i, err;
- if (alink->qdiscs[0].handle != opt->handle)
- return -EOPNOTSUPP;
- prev_stats = &alink->qdiscs[0].stats;
+ i = nfp_abm_red_find(alink, opt);
+ if (i < 0)
+ return i;
+ prev_stats = &alink->qdiscs[i].stats;
- err = nfp_abm_ctrl_read_stats(alink, &stats);
+ if (alink->parent == TC_H_ROOT)
+ err = nfp_abm_ctrl_read_stats(alink, &stats);
+ else
+ err = nfp_abm_ctrl_read_q_stats(alink, i, &stats);
if (err)
return err;
@@ -168,13 +238,17 @@ nfp_abm_red_xstats(struct nfp_abm_link *alink, struct tc_red_qopt_offload *opt)
{
struct nfp_alink_xstats *prev_xstats;
struct nfp_alink_xstats xstats;
- int err;
+ int i, err;
- if (alink->qdiscs[0].handle != opt->handle)
- return -EOPNOTSUPP;
- prev_xstats = &alink->qdiscs[0].xstats;
+ i = nfp_abm_red_find(alink, opt);
+ if (i < 0)
+ return i;
+ prev_xstats = &alink->qdiscs[i].xstats;
- err = nfp_abm_ctrl_read_xstats(alink, &xstats);
+ if (alink->parent == TC_H_ROOT)
+ err = nfp_abm_ctrl_read_xstats(alink, &xstats);
+ else
+ err = nfp_abm_ctrl_read_q_xstats(alink, i, &xstats);
if (err)
return err;
@@ -190,9 +264,6 @@ static int
nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink,
struct tc_red_qopt_offload *opt)
{
- if (opt->parent != TC_H_ROOT)
- return -EOPNOTSUPP;
-
switch (opt->command) {
case TC_RED_REPLACE:
return nfp_abm_red_replace(netdev, alink, opt);
@@ -208,6 +279,24 @@ nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink,
}
}
+static int
+nfp_abm_setup_tc_mq(struct net_device *netdev, struct nfp_abm_link *alink,
+ struct tc_mq_qopt_offload *opt)
+{
+ switch (opt->command) {
+ case TC_MQ_CREATE:
+ nfp_abm_reset_root(netdev, alink, opt->handle,
+ alink->total_queues);
+ return 0;
+ case TC_MQ_DESTROY:
+ if (opt->handle == alink->parent)
+ nfp_abm_reset_root(netdev, alink, TC_H_ROOT, 0);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
static int
nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
enum tc_setup_type type, void *type_data)
@@ -220,6 +309,8 @@ nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
return -EOPNOTSUPP;
switch (type) {
+ case TC_SETUP_QDISC_MQ:
+ return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data);
case TC_SETUP_QDISC_RED:
return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
default:
@@ -473,13 +564,21 @@ nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
alink->abm = abm;
alink->vnic = nn;
alink->id = id;
+ alink->parent = TC_H_ROOT;
+ alink->total_queues = alink->vnic->max_rx_rings;
+ alink->qdiscs = kvzalloc(sizeof(*alink->qdiscs) * alink->total_queues,
+ GFP_KERNEL);
+ if (!alink->qdiscs) {
+ err = -ENOMEM;
+ goto err_free_alink;
+ }
/* This is a multi-host app, make sure MAC/PHY is up, but don't
* make the MAC/PHY state follow the state of any of the ports.
*/
err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
if (err < 0)
- goto err_free_alink;
+ goto err_free_qdiscs;
netif_keep_dst(nn->dp.netdev);
@@ -488,6 +587,8 @@ nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
return 0;
+err_free_qdiscs:
+ kvfree(alink->qdiscs);
err_free_alink:
kfree(alink);
return err;
@@ -498,6 +599,7 @@ static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
struct nfp_abm_link *alink = nn->app_priv;
nfp_abm_kill_reprs(alink->abm, alink);
+ kvfree(alink->qdiscs);
kfree(alink);
}
diff --git a/drivers/net/ethernet/netronome/nfp/abm/main.h b/drivers/net/ethernet/netronome/nfp/abm/main.h
index 09fd15847961..934a70835473 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/main.h
+++ b/drivers/net/ethernet/netronome/nfp/abm/main.h
@@ -106,6 +106,9 @@ struct nfp_red_qdisc {
* @vnic: data vNIC
* @id: id of the data vNIC
* @queue_base: id of base to host queue within PCIe (not QC idx)
+ * @total_queues: number of PF queues
+ * @parent: handle of expected parent, i.e. handle of MQ, or TC_H_ROOT
+ * @num_qdiscs: number of currently used qdiscs
* @qdiscs: array of qdiscs
*/
struct nfp_abm_link {
@@ -113,16 +116,25 @@ struct nfp_abm_link {
struct nfp_net *vnic;
unsigned int id;
unsigned int queue_base;
- struct nfp_red_qdisc qdiscs[1];
+ unsigned int total_queues;
+ u32 parent;
+ unsigned int num_qdiscs;
+ struct nfp_red_qdisc *qdiscs;
};
void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink);
int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm);
int nfp_abm_ctrl_set_all_q_lvls(struct nfp_abm_link *alink, u32 val);
+int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int i,
+ u32 val);
int nfp_abm_ctrl_read_stats(struct nfp_abm_link *alink,
struct nfp_alink_stats *stats);
+int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int i,
+ struct nfp_alink_stats *stats);
int nfp_abm_ctrl_read_xstats(struct nfp_abm_link *alink,
struct nfp_alink_xstats *xstats);
+int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, unsigned int i,
+ struct nfp_alink_xstats *xstats);
u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i);
u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i);
int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm);
--
2.17.0
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