[PATCH v3 net-next 6/8] net: dsa: felix: add stream gate settings for psfp

Xiaoliang Yang
2021-08-31T03:36:01Z

This patch adds stream gate settings for PSFP. Use SGI table to store
stream gate entries. Disable the gate entry when it is not used by any
stream.

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
---
drivers/net/dsa/ocelot/felix_vsc9959.c | 205 ++++++++++++++++++++++++-
1 file changed, 201 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 3dbc4e991748..103f67736638 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -8,6 +8,7 @@
#include <soc/mscc/ocelot_ana.h>
#include <soc/mscc/ocelot_ptp.h>
#include <soc/mscc/ocelot_sys.h>
+#include <net/tc_act/tc_gate.h>
#include <soc/mscc/ocelot.h>
#include <linux/dsa/ocelot.h>
#include <linux/pcs-lynx.h>
@@ -1341,6 +1342,8 @@ static int vsc9959_port_setup_tc(struct dsa_switch *ds, int port,
#define VSC9959_PSFP_SFID_MAX 175
#define VSC9959_PSFP_GATE_ID_MAX 183
#define VSC9959_PSFP_POLICER_MAX 383
+#define VSC9959_PSFP_GATE_LIST_NUM 4
+#define VSC9959_PSFP_GATE_CYCLETIME_MIN 5000

struct felix_stream {
struct list_head list;
@@ -1373,6 +1376,24 @@ struct felix_stream_filter_counters {
u32 red;
};

+struct felix_stream_gate {
+ u32 index;
+ u8 enable;
+ u8 ipv_valid;
+ u8 init_ipv;
+ u64 basetime;
+ u64 cycletime;
+ u64 cycletime_ext;
+ u32 num_entries;
+ struct action_gate_entry entries[0];
+};
+
+struct felix_stream_gate_entry {
+ struct list_head list;
+ refcount_t refcount;
+ u32 index;
+};
+
static int vsc9959_stream_identify(struct flow_cls_offload *f,
struct felix_stream *stream)
{
@@ -1646,6 +1667,152 @@ static void vsc9959_psfp_sfi_table_del(struct ocelot *ocelot, u32 index)
}
}

+static void vsc9959_psfp_parse_gate(const struct flow_action_entry *entry,
+ struct felix_stream_gate *sgi)
+{
+ sgi->index = entry->gate.index;
+ sgi->ipv_valid = (entry->gate.prio < 0) ? 0 : 1;
+ sgi->init_ipv = (sgi->ipv_valid) ? entry->gate.prio : 0;
+ sgi->basetime = entry->gate.basetime;
+ sgi->cycletime = entry->gate.cycletime;
+ sgi->num_entries = entry->gate.num_entries;
+ sgi->enable = 1;
+
+ memcpy(sgi->entries, entry->gate.entries,
+ entry->gate.num_entries * sizeof(struct action_gate_entry));
+}
+
+static u32 vsc9959_sgi_cfg_status(struct ocelot *ocelot)
+{
+ return ocelot_read(ocelot, ANA_SG_ACCESS_CTRL);
+}
+
+static int vsc9959_psfp_sgi_set(struct ocelot *ocelot,
+ struct felix_stream_gate *sgi)
+{
+ struct action_gate_entry *e;
+ struct timespec64 base_ts;
+ u32 interval_sum = 0;
+ u32 val;
+ int i;
+
+ if (sgi->index > VSC9959_PSFP_GATE_ID_MAX)
+ return -EINVAL;
+
+ ocelot_write(ocelot, ANA_SG_ACCESS_CTRL_SGID(sgi->index),
+ ANA_SG_ACCESS_CTRL);
+
+ if (!sgi->enable) {
+ ocelot_rmw(ocelot, ANA_SG_CONFIG_REG_3_INIT_GATE_STATE,
+ ANA_SG_CONFIG_REG_3_INIT_GATE_STATE |
+ ANA_SG_CONFIG_REG_3_GATE_ENABLE,
+ ANA_SG_CONFIG_REG_3);
+
+ return 0;
+ }
+
+ if (sgi->cycletime < VSC9959_PSFP_GATE_CYCLETIME_MIN ||
+ sgi->cycletime > NSEC_PER_SEC)
+ return -EINVAL;
+
+ if (sgi->num_entries > VSC9959_PSFP_GATE_LIST_NUM)
+ return -EINVAL;
+
+ vsc9959_new_base_time(ocelot, sgi->basetime, sgi->cycletime, &base_ts);
+ ocelot_write(ocelot, base_ts.tv_nsec, ANA_SG_CONFIG_REG_1);
+ val = lower_32_bits(base_ts.tv_sec);
+ ocelot_write(ocelot, val, ANA_SG_CONFIG_REG_2);
+
+ val = upper_32_bits(base_ts.tv_sec);
+ ocelot_write(ocelot,
+ (sgi->ipv_valid ? ANA_SG_CONFIG_REG_3_IPV_VALID : 0) |
+ ANA_SG_CONFIG_REG_3_INIT_IPV(sgi->init_ipv) |
+ ANA_SG_CONFIG_REG_3_GATE_ENABLE |
+ ANA_SG_CONFIG_REG_3_LIST_LENGTH(sgi->num_entries) |
+ ANA_SG_CONFIG_REG_3_INIT_GATE_STATE |
+ ANA_SG_CONFIG_REG_3_BASE_TIME_SEC_MSB(val),
+ ANA_SG_CONFIG_REG_3);
+
+ ocelot_write(ocelot, sgi->cycletime, ANA_SG_CONFIG_REG_4);
+
+ e = sgi->entries;
+ for (i = 0; i < sgi->num_entries; i++) {
+ u32 ips = (e[i].ipv < 0) ? 0 : (e[i].ipv + 8);
+
+ ocelot_write_rix(ocelot, ANA_SG_GCL_GS_CONFIG_IPS(ips) |
+ (e[i].gate_state ?
+ ANA_SG_GCL_GS_CONFIG_GATE_STATE : 0),
+ ANA_SG_GCL_GS_CONFIG, i);
+
+ interval_sum += e[i].interval;
+ ocelot_write_rix(ocelot, interval_sum, ANA_SG_GCL_TI_CONFIG, i);
+ }
+
+ ocelot_rmw(ocelot, ANA_SG_ACCESS_CTRL_CONFIG_CHANGE,
+ ANA_SG_ACCESS_CTRL_CONFIG_CHANGE,
+ ANA_SG_ACCESS_CTRL);
+
+ return readx_poll_timeout(vsc9959_sgi_cfg_status, ocelot, val,
+ (!(ANA_SG_ACCESS_CTRL_CONFIG_CHANGE & val)),
+ 10, 100000);
+}
+
+static int vsc9959_psfp_sgi_table_add(struct ocelot *ocelot,
+ struct felix_stream_gate *sgi)
+{
+ struct felix_stream_gate_entry *tmp;
+ struct ocelot_psfp_list *psfp;
+ int ret;
+
+ psfp = &ocelot->psfp;
+
+ list_for_each_entry(tmp, &psfp->sgi_list, list)
+ if (tmp->index == sgi->index) {
+ refcount_inc(&tmp->refcount);
+ return 0;
+ }
+
+ tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ ret = vsc9959_psfp_sgi_set(ocelot, sgi);
+ if (ret) {
+ kfree(tmp);
+ return ret;
+ }
+
+ tmp->index = sgi->index;
+ refcount_set(&tmp->refcount, 1);
+ list_add_tail(&tmp->list, &psfp->sgi_list);
+
+ return 0;
+}
+
+static void vsc9959_psfp_sgi_table_del(struct ocelot *ocelot,
+ u32 index)
+{
+ struct felix_stream_gate_entry *tmp, *n;
+ struct felix_stream_gate sgi = {0};
+ struct ocelot_psfp_list *psfp;
+ u8 z;
+
+ psfp = &ocelot->psfp;
+
+ list_for_each_entry_safe(tmp, n, &psfp->sgi_list, list)
+ if (tmp->index == index) {
+ z = refcount_dec_and_test(&tmp->refcount);
+ if (z) {
+ sgi.index = index;
+ sgi.enable = 0;
+ vsc9959_psfp_sgi_set(ocelot, &sgi);
+ list_del(&tmp->list);
+ kfree(tmp);
+ }
+ break;
+ }
+}
+
static void vsc9959_psfp_counters_get(struct ocelot *ocelot, u32 index,
struct felix_stream_filter_counters *counters)
{
@@ -1672,8 +1839,9 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot,
struct felix_stream_filter sfi = {0};
const struct flow_action_entry *a;
struct felix_stream stream = {0};
+ struct felix_stream_gate *sgi;
struct ocelot_psfp_list *psfp;
- int ret, i;
+ int ret, i, size;

psfp = &ocelot->psfp;

@@ -1686,6 +1854,18 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot,
flow_action_for_each(i, a, &f->rule->action) {
switch (a->id) {
case FLOW_ACTION_GATE:
+ size = struct_size(sgi, entries, a->gate.num_entries);
+ sgi = kzalloc(size, GFP_KERNEL);
+ vsc9959_psfp_parse_gate(a, sgi);
+ ret = vsc9959_psfp_sgi_table_add(ocelot, sgi);
+ if (ret) {
+ kfree(sgi);
+ return ret;
+ }
+ sfi.sg_valid = 1;
+ sfi.sgid = sgi->index;
+ kfree(sgi);
+ break;
case FLOW_ACTION_POLICE:
default:
return -EOPNOTSUPP;
@@ -1696,7 +1876,8 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot,
ret = vsc9959_stream_table_lookup(&psfp->stream_list, &stream);
if (ret) {
NL_SET_ERR_MSG_MOD(extack, "This stream is already added");
- return -EEXIST;
+ ret = -EEXIST;
+ goto err;
}

sfi.prio_valid = (stream.prio < 0 ? 0 : 1);
@@ -1705,14 +1886,22 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot,

ret = vsc9959_psfp_sfi_table_add(ocelot, &sfi);
if (ret)
- return ret;
+ goto err;

stream.sfid = sfi.index;
stream.sfid_valid = 1;
ret = vsc9959_stream_table_add(ocelot, &psfp->stream_list,
&stream, extack);
- if (ret)
+ if (ret) {
vsc9959_psfp_sfi_table_del(ocelot, stream.sfid);
+ goto err;
+ }
+
+ return 0;
+
+err:
+ if (sfi.sg_valid)
+ vsc9959_psfp_sgi_table_del(ocelot, sfi.sgid);

return ret;
}
@@ -1720,6 +1909,7 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot,
static int vsc9959_psfp_filter_del(struct ocelot *ocelot,
struct flow_cls_offload *f)
{
+ static struct felix_stream_filter *sfi;
struct ocelot_psfp_list *psfp;
struct felix_stream *stream;

@@ -1729,6 +1919,13 @@ static int vsc9959_psfp_filter_del(struct ocelot *ocelot,
if (!stream)
return -ENOMEM;

+ sfi = vsc9959_psfp_sfi_table_get(&psfp->sfi_list, stream->sfid);
+ if (!sfi)
+ return -ENOMEM;
+
+ if (sfi->sg_valid)
+ vsc9959_psfp_sgi_table_del(ocelot, sfi->sgid);
+
vsc9959_psfp_sfi_table_del(ocelot, stream->sfid);

stream->sfid_valid = 0;
--
2.17.1