openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

net: dsa: sja1105: add configuration of port policers 

This adds partial configuration support for the L2 Policing Table. Out
of the 45 policing entries, only 5 are used (one for each port), in a
shared manner. All 8 traffic classes, and the broadcast policer, are
redirected to a common instance which belongs to the ingress port.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-03-29 14:52:01 +03:00 committed by David S. Miller
parent fc411eaac8
commit a7cc081cab
1 changed files with 100 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
drivers/net/dsa/sja1105/sja1105_main.c
View File

@ -516,23 +516,56 @@ static int sja1105_init_avb_params(struct sja1105_private *priv)
return 0;
}
/* The L2 policing table is 2-stage. The table is looked up for each frame
* according to the ingress port, whether it was broadcast or not, and the
* classified traffic class (given by VLAN PCP). This portion of the lookup is
* fixed, and gives access to the SHARINDX, an indirection register pointing
* within the policing table itself, which is used to resolve the policer that
* will be used for this frame.
*
* Stage 1 Stage 2
* +------------+--------+ +---------------------------------+
* |Port 0 TC 0 |SHARINDX| | Policer 0: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 0 TC 1 |SHARINDX| | Policer 1: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 2: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 0 TC 7 |SHARINDX| | Policer 3: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 1 TC 0 |SHARINDX| | Policer 4: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 5: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 1 TC 7 |SHARINDX| | Policer 6: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* ... | Policer 7: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
* |Port 4 TC 7 |SHARINDX| ...
* +------------+--------+
* |Port 0 BCAST|SHARINDX| ...
* +------------+--------+
* |Port 1 BCAST|SHARINDX| ...
* +------------+--------+
* ... ...
* +------------+--------+ +---------------------------------+
* |Port 4 BCAST|SHARINDX| | Policer 44: Rate, Burst, MTU |
* +------------+--------+ +---------------------------------+
*
* In this driver, we shall use policers 0-4 as statically alocated port
* (matchall) policers. So we need to make the SHARINDX for all lookups
* corresponding to this ingress port (8 VLAN PCP lookups and 1 broadcast
* lookup) equal.
* The remaining policers (40) shall be dynamically allocated for flower
* policers, where the key is either vlan_prio or dst_mac ff:ff:ff:ff:ff:ff.
*/
#define SJA1105_RATE_MBPS(speed) (((speed) * 64000) / 1000)
static void sja1105_setup_policer(struct sja1105_l2_policing_entry *policing,
int index, int mtu)
{
policing[index].sharindx = index;
policing[index].smax = 65535; /* Burst size in bytes */
policing[index].rate = SJA1105_RATE_MBPS(1000);
policing[index].maxlen = mtu;
policing[index].partition = 0;
}
static int sja1105_init_l2_policing(struct sja1105_private *priv)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_table *table;
int i, j, k;
int port, tc;
table = &priv->static_config.tables[BLK_IDX_L2_POLICING];
@ -551,22 +584,29 @@ static int sja1105_init_l2_policing(struct sja1105_private *priv)
policing = table->entries;
/* k sweeps through all unicast policers (0-39).
* bcast sweeps through policers 40-44.
*/
for (i = 0, k = 0; i < SJA1105_NUM_PORTS; i++) {
int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + i;
/* Setup shared indices for the matchall policers */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + port;
for (tc = 0; tc < SJA1105_NUM_TC; tc++)
policing[port * SJA1105_NUM_TC + tc].sharindx = port;
policing[bcast].sharindx = port;
}
/* Setup the matchall policer parameters */
for (port = 0; port < SJA1105_NUM_PORTS; port++) {
int mtu = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN;
if (dsa_is_cpu_port(priv->ds, i))
if (dsa_is_cpu_port(priv->ds, port))
mtu += VLAN_HLEN;
for (j = 0; j < SJA1105_NUM_TC; j++, k++)
sja1105_setup_policer(policing, k, mtu);
/* Set up this port's policer for broadcast traffic */
sja1105_setup_policer(policing, bcast, mtu);
policing[port].smax = 65535; /* Burst size in bytes */
policing[port].rate = SJA1105_RATE_MBPS(1000);
policing[port].maxlen = mtu;
policing[port].partition = 0;
}
return 0;
}
@ -2129,10 +2169,8 @@ static int sja1105_set_ageing_time(struct dsa_switch *ds,
static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + port;
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
int tc;
new_mtu += VLAN_ETH_HLEN + ETH_FCS_LEN;
@ -2141,16 +2179,10 @@ static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
/* We set all 9 port policers to the same value, so just checking the
* broadcast one is fine.
*/
if (policing[bcast].maxlen == new_mtu)
if (policing[port].maxlen == new_mtu)
return 0;
for (tc = 0; tc < SJA1105_NUM_TC; tc++)
policing[port * SJA1105_NUM_TC + tc].maxlen = new_mtu;
policing[bcast].maxlen = new_mtu;
policing[port].maxlen = new_mtu;
return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
@ -2250,6 +2282,40 @@ static void sja1105_mirror_del(struct dsa_switch *ds, int port,
mirror->ingress, false);
}
static int sja1105_port_policer_add(struct dsa_switch *ds, int port,
struct dsa_mall_policer_tc_entry *policer)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
/* In hardware, every 8 microseconds the credit level is incremented by
* the value of RATE bytes divided by 64, up to a maximum of SMAX
* bytes.
*/
policing[port].rate = div_u64(512 * policer->rate_bytes_per_sec,
1000000);
policing[port].smax = div_u64(policer->rate_bytes_per_sec *
PSCHED_NS2TICKS(policer->burst),
PSCHED_TICKS_PER_SEC);
return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
static void sja1105_port_policer_del(struct dsa_switch *ds, int port)
{
struct sja1105_l2_policing_entry *policing;
struct sja1105_private *priv = ds->priv;
policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries;
policing[port].rate = SJA1105_RATE_MBPS(1000);
policing[port].smax = 65535;
sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING);
}
static const struct dsa_switch_ops sja1105_switch_ops = {
.get_tag_protocol = sja1105_get_tag_protocol,
.setup = sja1105_setup,
@ -2288,6 +2354,8 @@ static const struct dsa_switch_ops sja1105_switch_ops = {
.port_setup_tc = sja1105_port_setup_tc,
.port_mirror_add = sja1105_mirror_add,
.port_mirror_del = sja1105_mirror_del,
.port_policer_add = sja1105_port_policer_add,
.port_policer_del = sja1105_port_policer_del,
};
static int sja1105_check_device_id(struct sja1105_private *priv)