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zircon-guest/third_party/linux/refs/heads/master/./drivers/net/ethernet/mscc/ocelot.c
blob: 67ecd0e9100297e06b3763eff7b69f97271a1cee [file] [edit]
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
* Microsemi Ocelot Switch driver
*
* Copyright (c) 2017 Microsemi Corporation
*/
#include <linux/dsa/ocelot.h>
#include <linux/if_bridge.h>
#include <linux/iopoll.h>
#include <linux/phy/phy.h>
#include <net/pkt_sched.h>
#include <soc/mscc/ocelot_hsio.h>
#include <soc/mscc/ocelot_vcap.h>
#include "ocelot.h"
#include "ocelot_vcap.h"
#define TABLE_UPDATE_SLEEP_US 10
#define TABLE_UPDATE_TIMEOUT_US 100000
#define MEM_INIT_SLEEP_US 1000
#define MEM_INIT_TIMEOUT_US 100000
#define OCELOT_RSV_VLAN_RANGE_START 4000
struct ocelot_mact_entry {
u8 mac[ETH_ALEN];
u16 vid;
enum macaccess_entry_type type;
};
/* Caller must hold &ocelot->mact_lock */
static inline u32 ocelot_mact_read_macaccess(struct ocelot *ocelot)
{
return ocelot_read(ocelot, ANA_TABLES_MACACCESS);
}
/* Caller must hold &ocelot->mact_lock */
static inline int ocelot_mact_wait_for_completion(struct ocelot *ocelot)
{
u32 val;
return readx_poll_timeout(ocelot_mact_read_macaccess,
ocelot, val,
(val & ANA_TABLES_MACACCESS_MAC_TABLE_CMD_M) ==
MACACCESS_CMD_IDLE,
TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
}
/* Caller must hold &ocelot->mact_lock */
static void ocelot_mact_select(struct ocelot *ocelot,
const unsigned char mac[ETH_ALEN],
unsigned int vid)
{
u32 macl = 0, mach = 0;
/* Set the MAC address to handle and the vlan associated in a format
* understood by the hardware.
*/
mach |= vid << 16;
mach |= mac[0] << 8;
mach |= mac[1] << 0;
macl |= mac[2] << 24;
macl |= mac[3] << 16;
macl |= mac[4] << 8;
macl |= mac[5] << 0;
ocelot_write(ocelot, macl, ANA_TABLES_MACLDATA);
ocelot_write(ocelot, mach, ANA_TABLES_MACHDATA);
}
static int __ocelot_mact_learn(struct ocelot *ocelot, int port,
const unsigned char mac[ETH_ALEN],
unsigned int vid, enum macaccess_entry_type type)
{
u32 cmd = ANA_TABLES_MACACCESS_VALID |
ANA_TABLES_MACACCESS_DEST_IDX(port) |
ANA_TABLES_MACACCESS_ENTRYTYPE(type) |
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_LEARN);
unsigned int mc_ports;
int err;
/* Set MAC_CPU_COPY if the CPU port is used by a multicast entry */
if (type == ENTRYTYPE_MACv4)
mc_ports = (mac[1] << 8) | mac[2];
else if (type == ENTRYTYPE_MACv6)
mc_ports = (mac[0] << 8) | mac[1];
else
mc_ports = 0;
if (mc_ports & BIT(ocelot->num_phys_ports))
cmd |= ANA_TABLES_MACACCESS_MAC_CPU_COPY;
ocelot_mact_select(ocelot, mac, vid);
/* Issue a write command */
ocelot_write(ocelot, cmd, ANA_TABLES_MACACCESS);
err = ocelot_mact_wait_for_completion(ocelot);
return err;
}
int ocelot_mact_learn(struct ocelot *ocelot, int port,
const unsigned char mac[ETH_ALEN],
unsigned int vid, enum macaccess_entry_type type)
{
int ret;
mutex_lock(&ocelot->mact_lock);
ret = __ocelot_mact_learn(ocelot, port, mac, vid, type);
mutex_unlock(&ocelot->mact_lock);
return ret;
}
EXPORT_SYMBOL(ocelot_mact_learn);
int ocelot_mact_forget(struct ocelot *ocelot,
const unsigned char mac[ETH_ALEN], unsigned int vid)
{
int err;
mutex_lock(&ocelot->mact_lock);
ocelot_mact_select(ocelot, mac, vid);
/* Issue a forget command */
ocelot_write(ocelot,
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_FORGET),
ANA_TABLES_MACACCESS);
err = ocelot_mact_wait_for_completion(ocelot);
mutex_unlock(&ocelot->mact_lock);
return err;
}
EXPORT_SYMBOL(ocelot_mact_forget);
int ocelot_mact_lookup(struct ocelot *ocelot, int *dst_idx,
const unsigned char mac[ETH_ALEN],
unsigned int vid, enum macaccess_entry_type *type)
{
int val;
mutex_lock(&ocelot->mact_lock);
ocelot_mact_select(ocelot, mac, vid);
/* Issue a read command with MACACCESS_VALID=1. */
ocelot_write(ocelot, ANA_TABLES_MACACCESS_VALID |
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_READ),
ANA_TABLES_MACACCESS);
if (ocelot_mact_wait_for_completion(ocelot)) {
mutex_unlock(&ocelot->mact_lock);
return -ETIMEDOUT;
}
/* Read back the entry flags */
val = ocelot_read(ocelot, ANA_TABLES_MACACCESS);
mutex_unlock(&ocelot->mact_lock);
if (!(val & ANA_TABLES_MACACCESS_VALID))
return -ENOENT;
*dst_idx = ANA_TABLES_MACACCESS_DEST_IDX_X(val);
*type = ANA_TABLES_MACACCESS_ENTRYTYPE_X(val);
return 0;
}
EXPORT_SYMBOL(ocelot_mact_lookup);
int ocelot_mact_learn_streamdata(struct ocelot *ocelot, int dst_idx,
const unsigned char mac[ETH_ALEN],
unsigned int vid,
enum macaccess_entry_type type,
int sfid, int ssid)
{
int ret;
mutex_lock(&ocelot->mact_lock);
ocelot_write(ocelot,
(sfid < 0 ? 0 : ANA_TABLES_STREAMDATA_SFID_VALID) |
ANA_TABLES_STREAMDATA_SFID(sfid) |
(ssid < 0 ? 0 : ANA_TABLES_STREAMDATA_SSID_VALID) |
ANA_TABLES_STREAMDATA_SSID(ssid),
ANA_TABLES_STREAMDATA);
ret = __ocelot_mact_learn(ocelot, dst_idx, mac, vid, type);
mutex_unlock(&ocelot->mact_lock);
return ret;
}
EXPORT_SYMBOL(ocelot_mact_learn_streamdata);
static void ocelot_mact_init(struct ocelot *ocelot)
{
/* Configure the learning mode entries attributes:
* - Do not copy the frame to the CPU extraction queues.
* - Use the vlan and mac_cpoy for dmac lookup.
*/
ocelot_rmw(ocelot, 0,
ANA_AGENCTRL_LEARN_CPU_COPY | ANA_AGENCTRL_IGNORE_DMAC_FLAGS
| ANA_AGENCTRL_LEARN_FWD_KILL
| ANA_AGENCTRL_LEARN_IGNORE_VLAN,
ANA_AGENCTRL);
/* Clear the MAC table. We are not concurrent with anyone, so
* holding &ocelot->mact_lock is pointless.
*/
ocelot_write(ocelot, MACACCESS_CMD_INIT, ANA_TABLES_MACACCESS);
}
void ocelot_pll5_init(struct ocelot *ocelot)
{
/* Configure PLL5. This will need a proper CCF driver
* The values are coming from the VTSS API for Ocelot
*/
regmap_write(ocelot->targets[HSIO], HSIO_PLL5G_CFG4,
HSIO_PLL5G_CFG4_IB_CTRL(0x7600) |
HSIO_PLL5G_CFG4_IB_BIAS_CTRL(0x8));
regmap_write(ocelot->targets[HSIO], HSIO_PLL5G_CFG0,
HSIO_PLL5G_CFG0_CORE_CLK_DIV(0x11) |
HSIO_PLL5G_CFG0_CPU_CLK_DIV(2) |
HSIO_PLL5G_CFG0_ENA_BIAS |
HSIO_PLL5G_CFG0_ENA_VCO_BUF |
HSIO_PLL5G_CFG0_ENA_CP1 |
HSIO_PLL5G_CFG0_SELCPI(2) |
HSIO_PLL5G_CFG0_LOOP_BW_RES(0xe) |
HSIO_PLL5G_CFG0_SELBGV820(4) |
HSIO_PLL5G_CFG0_DIV4 |
HSIO_PLL5G_CFG0_ENA_CLKTREE |
HSIO_PLL5G_CFG0_ENA_LANE);
regmap_write(ocelot->targets[HSIO], HSIO_PLL5G_CFG2,
HSIO_PLL5G_CFG2_EN_RESET_FRQ_DET |
HSIO_PLL5G_CFG2_EN_RESET_OVERRUN |
HSIO_PLL5G_CFG2_GAIN_TEST(0x8) |
HSIO_PLL5G_CFG2_ENA_AMPCTRL |
HSIO_PLL5G_CFG2_PWD_AMPCTRL_N |
HSIO_PLL5G_CFG2_AMPC_SEL(0x10));
}
EXPORT_SYMBOL(ocelot_pll5_init);
static void ocelot_vcap_enable(struct ocelot *ocelot, int port)
{
ocelot_write_gix(ocelot, ANA_PORT_VCAP_S2_CFG_S2_ENA |
ANA_PORT_VCAP_S2_CFG_S2_IP6_CFG(0xa),
ANA_PORT_VCAP_S2_CFG, port);
ocelot_write_gix(ocelot, ANA_PORT_VCAP_CFG_S1_ENA,
ANA_PORT_VCAP_CFG, port);
ocelot_rmw_gix(ocelot, REW_PORT_CFG_ES0_EN,
REW_PORT_CFG_ES0_EN,
REW_PORT_CFG, port);
}
static int ocelot_single_vlan_aware_bridge(struct ocelot *ocelot,
struct netlink_ext_ack *extack)
{
struct net_device *bridge = NULL;
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port || !ocelot_port->bridge ||
!br_vlan_enabled(ocelot_port->bridge))
continue;
if (!bridge) {
bridge = ocelot_port->bridge;
continue;
}
if (bridge == ocelot_port->bridge)
continue;
NL_SET_ERR_MSG_MOD(extack,
"Only one VLAN-aware bridge is supported");
return -EBUSY;
}
return 0;
}
static inline u32 ocelot_vlant_read_vlanaccess(struct ocelot *ocelot)
{
return ocelot_read(ocelot, ANA_TABLES_VLANACCESS);
}
static inline int ocelot_vlant_wait_for_completion(struct ocelot *ocelot)
{
u32 val;
return readx_poll_timeout(ocelot_vlant_read_vlanaccess,
ocelot,
val,
(val & ANA_TABLES_VLANACCESS_VLAN_TBL_CMD_M) ==
ANA_TABLES_VLANACCESS_CMD_IDLE,
TABLE_UPDATE_SLEEP_US, TABLE_UPDATE_TIMEOUT_US);
}
static int ocelot_vlant_set_mask(struct ocelot *ocelot, u16 vid, u32 mask)
{
/* Select the VID to configure */
ocelot_write(ocelot, ANA_TABLES_VLANTIDX_V_INDEX(vid),
ANA_TABLES_VLANTIDX);
/* Set the vlan port members mask and issue a write command */
ocelot_write(ocelot, ANA_TABLES_VLANACCESS_VLAN_PORT_MASK(mask) |
ANA_TABLES_VLANACCESS_CMD_WRITE,
ANA_TABLES_VLANACCESS);
return ocelot_vlant_wait_for_completion(ocelot);
}
static int ocelot_port_num_untagged_vlans(struct ocelot *ocelot, int port)
{
struct ocelot_bridge_vlan *vlan;
int num_untagged = 0;
list_for_each_entry(vlan, &ocelot->vlans, list) {
if (!(vlan->portmask & BIT(port)))
continue;
/* Ignore the VLAN added by ocelot_add_vlan_unaware_pvid(),
* because this is never active in hardware at the same time as
* the bridge VLANs, which only matter in VLAN-aware mode.
*/
if (vlan->vid >= OCELOT_RSV_VLAN_RANGE_START)
continue;
if (vlan->untagged & BIT(port))
num_untagged++;
}
return num_untagged;
}
static int ocelot_port_num_tagged_vlans(struct ocelot *ocelot, int port)
{
struct ocelot_bridge_vlan *vlan;
int num_tagged = 0;
list_for_each_entry(vlan, &ocelot->vlans, list) {
if (!(vlan->portmask & BIT(port)))
continue;
if (!(vlan->untagged & BIT(port)))
num_tagged++;
}
return num_tagged;
}
/* We use native VLAN when we have to mix egress-tagged VLANs with exactly
* _one_ egress-untagged VLAN (_the_ native VLAN)
*/
static bool ocelot_port_uses_native_vlan(struct ocelot *ocelot, int port)
{
return ocelot_port_num_tagged_vlans(ocelot, port) &&
ocelot_port_num_untagged_vlans(ocelot, port) == 1;
}
static struct ocelot_bridge_vlan *
ocelot_port_find_native_vlan(struct ocelot *ocelot, int port)
{
struct ocelot_bridge_vlan *vlan;
list_for_each_entry(vlan, &ocelot->vlans, list)
if (vlan->portmask & BIT(port) && vlan->untagged & BIT(port))
return vlan;
return NULL;
}
/* Keep in sync REW_TAG_CFG_TAG_CFG and, if applicable,
* REW_PORT_VLAN_CFG_PORT_VID, with the bridge VLAN table and VLAN awareness
* state of the port.
*/
static void ocelot_port_manage_port_tag(struct ocelot *ocelot, int port)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
enum ocelot_port_tag_config tag_cfg;
bool uses_native_vlan = false;
if (ocelot_port->vlan_aware) {
uses_native_vlan = ocelot_port_uses_native_vlan(ocelot, port);
if (uses_native_vlan)
tag_cfg = OCELOT_PORT_TAG_NATIVE;
else if (ocelot_port_num_untagged_vlans(ocelot, port))
tag_cfg = OCELOT_PORT_TAG_DISABLED;
else
tag_cfg = OCELOT_PORT_TAG_TRUNK;
} else {
tag_cfg = OCELOT_PORT_TAG_DISABLED;
}
ocelot_rmw_gix(ocelot, REW_TAG_CFG_TAG_CFG(tag_cfg),
REW_TAG_CFG_TAG_CFG_M,
REW_TAG_CFG, port);
if (uses_native_vlan) {
struct ocelot_bridge_vlan *native_vlan;
/* Not having a native VLAN is impossible, because
* ocelot_port_num_untagged_vlans has returned 1.
* So there is no use in checking for NULL here.
*/
native_vlan = ocelot_port_find_native_vlan(ocelot, port);
ocelot_rmw_gix(ocelot,
REW_PORT_VLAN_CFG_PORT_VID(native_vlan->vid),
REW_PORT_VLAN_CFG_PORT_VID_M,
REW_PORT_VLAN_CFG, port);
}
}
int ocelot_bridge_num_find(struct ocelot *ocelot,
const struct net_device *bridge)
{
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (ocelot_port && ocelot_port->bridge == bridge)
return ocelot_port->bridge_num;
}
return -1;
}
EXPORT_SYMBOL_GPL(ocelot_bridge_num_find);
static u16 ocelot_vlan_unaware_pvid(struct ocelot *ocelot,
const struct net_device *bridge)
{
int bridge_num;
/* Standalone ports use VID 0 */
if (!bridge)
return 0;
bridge_num = ocelot_bridge_num_find(ocelot, bridge);
if (WARN_ON(bridge_num < 0))
return 0;
/* VLAN-unaware bridges use a reserved VID going from 4095 downwards */
return VLAN_N_VID - bridge_num - 1;
}
/**
* ocelot_update_vlan_reclassify_rule() - Make switch aware only to bridge VLAN TPID
*
* @ocelot: Switch private data structure
* @port: Index of ingress port
*
* IEEE 802.1Q-2018 clauses "5.5 C-VLAN component conformance" and "5.6 S-VLAN
* component conformance" suggest that a C-VLAN component should only recognize
* and filter on C-Tags, and an S-VLAN component should only recognize and
* process based on C-Tags.
*
* In Linux, as per commit 1a0b20b25732 ("Merge branch 'bridge-next'"), C-VLAN
* components are largely represented by a bridge with vlan_protocol 802.1Q,
* and S-VLAN components by a bridge with vlan_protocol 802.1ad.
*
* Currently the driver only offloads vlan_protocol 802.1Q, but the hardware
* design is non-conformant, because the switch assigns each frame to a VLAN
* based on an entirely different question, as detailed in figure "Basic VLAN
* Classification Flow" from its manual and reproduced below.
*
* Set TAG_TYPE, PCP, DEI, VID to port-default values in VLAN_CFG register
* if VLAN_AWARE_ENA[port] and frame has outer tag then:
* if VLAN_INNER_TAG_ENA[port] and frame has inner tag then:
* TAG_TYPE = (Frame.InnerTPID <> 0x8100)
* Set PCP, DEI, VID to values from inner VLAN header
* else:
* TAG_TYPE = (Frame.OuterTPID <> 0x8100)
* Set PCP, DEI, VID to values from outer VLAN header
* if VID == 0 then:
* VID = VLAN_CFG.VLAN_VID
*
* Summarized, the switch will recognize both 802.1Q and 802.1ad TPIDs as VLAN
* "with equal rights", and just set the TAG_TYPE bit to 0 (if 802.1Q) or to 1
* (if 802.1ad). It will classify based on whichever of the tags is "outer", no
* matter what TPID that may have (or "inner", if VLAN_INNER_TAG_ENA[port]).
*
* In the VLAN Table, the TAG_TYPE information is not accessible - just the
* classified VID is - so it is as if each VLAN Table entry is for 2 VLANs:
* C-VLAN X, and S-VLAN X.
*
* Whereas the Linux bridge behavior is to only filter on frames with a TPID
* equal to the vlan_protocol, and treat everything else as VLAN-untagged.
*
* Consider an ingress packet tagged with 802.1ad VID=3 and 802.1Q VID=5,
* received on a bridge vlan_filtering=1 vlan_protocol=802.1Q port. This frame
* should be treated as 802.1Q-untagged, and classified to the PVID of that
* bridge port. Not to VID=3, and not to VID=5.
*
* The VCAP IS1 TCAM has everything we need to overwrite the choices made in
* the basic VLAN classification pipeline: it can match on TAG_TYPE in the key,
* and it can modify the classified VID in the action. Thus, for each port
* under a vlan_filtering bridge, we can insert a rule in VCAP IS1 lookup 0 to
* match on 802.1ad tagged frames and modify their classified VID to the 802.1Q
* PVID of the port. This effectively makes it appear to the outside world as
* if those packets were processed as VLAN-untagged.
*
* The rule needs to be updated each time the bridge PVID changes, and needs
* to be deleted if the bridge PVID is deleted, or if the port becomes
* VLAN-unaware.
*/
static int ocelot_update_vlan_reclassify_rule(struct ocelot *ocelot, int port)
{
unsigned long cookie = OCELOT_VCAP_IS1_VLAN_RECLASSIFY(ocelot, port);
struct ocelot_vcap_block *block_vcap_is1 = &ocelot->block[VCAP_IS1];
struct ocelot_port *ocelot_port = ocelot->ports[port];
const struct ocelot_bridge_vlan *pvid_vlan;
struct ocelot_vcap_filter *filter;
int err, val, pcp, dei;
bool vid_replace_ena;
u16 vid;
pvid_vlan = ocelot_port->pvid_vlan;
vid_replace_ena = ocelot_port->vlan_aware && pvid_vlan;
filter = ocelot_vcap_block_find_filter_by_id(block_vcap_is1, cookie,
false);
if (!vid_replace_ena) {
/* If the reclassification filter doesn't need to exist, delete
* it if it was previously installed, and exit doing nothing
* otherwise.
*/
if (filter)
return ocelot_vcap_filter_del(ocelot, filter);
return 0;
}
/* The reclassification rule must apply. See if it already exists
* or if it must be created.
*/
/* Treating as VLAN-untagged means using as classified VID equal to
* the bridge PVID, and PCP/DEI set to the port default QoS values.
*/
vid = pvid_vlan->vid;
val = ocelot_read_gix(ocelot, ANA_PORT_QOS_CFG, port);
pcp = ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL_X(val);
dei = !!(val & ANA_PORT_QOS_CFG_DP_DEFAULT_VAL);
if (filter) {
bool changed = false;
/* Filter exists, just update it */
if (filter->action.vid != vid) {
filter->action.vid = vid;
changed = true;
}
if (filter->action.pcp != pcp) {
filter->action.pcp = pcp;
changed = true;
}
if (filter->action.dei != dei) {
filter->action.dei = dei;
changed = true;
}
if (!changed)
return 0;
return ocelot_vcap_filter_replace(ocelot, filter);
}
/* Filter doesn't exist, create it */
filter = kzalloc_obj(*filter);
if (!filter)
return -ENOMEM;
filter->key_type = OCELOT_VCAP_KEY_ANY;
filter->ingress_port_mask = BIT(port);
filter->vlan.tpid = OCELOT_VCAP_BIT_1;
filter->prio = 1;
filter->id.cookie = cookie;
filter->id.tc_offload = false;
filter->block_id = VCAP_IS1;
filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
filter->lookup = 0;
filter->action.vid_replace_ena = true;
filter->action.pcp_dei_ena = true;
filter->action.vid = vid;
filter->action.pcp = pcp;
filter->action.dei = dei;
err = ocelot_vcap_filter_add(ocelot, filter, NULL);
if (err)
kfree(filter);
return err;
}
/* Default vlan to clasify for untagged frames (may be zero) */
static int ocelot_port_set_pvid(struct ocelot *ocelot, int port,
const struct ocelot_bridge_vlan *pvid_vlan)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
u16 pvid = ocelot_vlan_unaware_pvid(ocelot, ocelot_port->bridge);
u32 val = 0;
ocelot_port->pvid_vlan = pvid_vlan;
if (ocelot_port->vlan_aware && pvid_vlan)
pvid = pvid_vlan->vid;
ocelot_rmw_gix(ocelot,
ANA_PORT_VLAN_CFG_VLAN_VID(pvid),
ANA_PORT_VLAN_CFG_VLAN_VID_M,
ANA_PORT_VLAN_CFG, port);
/* If there's no pvid, we should drop not only untagged traffic (which
* happens automatically), but also 802.1p traffic which gets
* classified to VLAN 0, but that is always in our RX filter, so it
* would get accepted were it not for this setting.
*
* Also, we only support the bridge 802.1Q VLAN protocol, so
* 802.1ad-tagged frames (carrying S-Tags) should be considered
* 802.1Q-untagged, and also dropped.
*/
if (!pvid_vlan && ocelot_port->vlan_aware)
val = ANA_PORT_DROP_CFG_DROP_PRIO_S_TAGGED_ENA |
ANA_PORT_DROP_CFG_DROP_PRIO_C_TAGGED_ENA |
ANA_PORT_DROP_CFG_DROP_S_TAGGED_ENA;
ocelot_rmw_gix(ocelot, val,
ANA_PORT_DROP_CFG_DROP_PRIO_S_TAGGED_ENA |
ANA_PORT_DROP_CFG_DROP_PRIO_C_TAGGED_ENA |
ANA_PORT_DROP_CFG_DROP_S_TAGGED_ENA,
ANA_PORT_DROP_CFG, port);
return ocelot_update_vlan_reclassify_rule(ocelot, port);
}
static struct ocelot_bridge_vlan *ocelot_bridge_vlan_find(struct ocelot *ocelot,
u16 vid)
{
struct ocelot_bridge_vlan *vlan;
list_for_each_entry(vlan, &ocelot->vlans, list)
if (vlan->vid == vid)
return vlan;
return NULL;
}
static int ocelot_vlan_member_add(struct ocelot *ocelot, int port, u16 vid,
bool untagged)
{
struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
unsigned long portmask;
int err;
if (vlan) {
portmask = vlan->portmask | BIT(port);
err = ocelot_vlant_set_mask(ocelot, vid, portmask);
if (err)
return err;
vlan->portmask = portmask;
/* Bridge VLANs can be overwritten with a different
* egress-tagging setting, so make sure to override an untagged
* with a tagged VID if that's going on.
*/
if (untagged)
vlan->untagged |= BIT(port);
else
vlan->untagged &= ~BIT(port);
return 0;
}
vlan = kzalloc_obj(*vlan);
if (!vlan)
return -ENOMEM;
portmask = BIT(port);
err = ocelot_vlant_set_mask(ocelot, vid, portmask);
if (err) {
kfree(vlan);
return err;
}
vlan->vid = vid;
vlan->portmask = portmask;
if (untagged)
vlan->untagged = BIT(port);
INIT_LIST_HEAD(&vlan->list);
list_add_tail(&vlan->list, &ocelot->vlans);
return 0;
}
static int ocelot_vlan_member_del(struct ocelot *ocelot, int port, u16 vid)
{
struct ocelot_bridge_vlan *vlan = ocelot_bridge_vlan_find(ocelot, vid);
unsigned long portmask;
int err;
if (!vlan)
return 0;
portmask = vlan->portmask & ~BIT(port);
err = ocelot_vlant_set_mask(ocelot, vid, portmask);
if (err)
return err;
vlan->portmask = portmask;
if (vlan->portmask)
return 0;
list_del(&vlan->list);
kfree(vlan);
return 0;
}
static int ocelot_add_vlan_unaware_pvid(struct ocelot *ocelot, int port,
const struct net_device *bridge)
{
u16 vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
return ocelot_vlan_member_add(ocelot, port, vid, true);
}
static int ocelot_del_vlan_unaware_pvid(struct ocelot *ocelot, int port,
const struct net_device *bridge)
{
u16 vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
return ocelot_vlan_member_del(ocelot, port, vid);
}
int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
bool vlan_aware, struct netlink_ext_ack *extack)
{
struct ocelot_vcap_block *block = &ocelot->block[VCAP_IS1];
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct ocelot_vcap_filter *filter;
int err = 0;
u32 val;
list_for_each_entry(filter, &block->rules, list) {
if (filter->ingress_port_mask & BIT(port) &&
filter->action.vid_replace_ena) {
NL_SET_ERR_MSG_MOD(extack,
"Cannot change VLAN state with vlan modify rules active");
return -EBUSY;
}
}
err = ocelot_single_vlan_aware_bridge(ocelot, extack);
if (err)
return err;
if (vlan_aware)
err = ocelot_del_vlan_unaware_pvid(ocelot, port,
ocelot_port->bridge);
else if (ocelot_port->bridge)
err = ocelot_add_vlan_unaware_pvid(ocelot, port,
ocelot_port->bridge);
if (err)
return err;
ocelot_port->vlan_aware = vlan_aware;
if (vlan_aware)
val = ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
ANA_PORT_VLAN_CFG_VLAN_POP_CNT(1);
else
val = 0;
ocelot_rmw_gix(ocelot, val,
ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
ANA_PORT_VLAN_CFG_VLAN_POP_CNT_M,
ANA_PORT_VLAN_CFG, port);
err = ocelot_port_set_pvid(ocelot, port, ocelot_port->pvid_vlan);
if (err)
return err;
ocelot_port_manage_port_tag(ocelot, port);
return 0;
}
EXPORT_SYMBOL(ocelot_port_vlan_filtering);
int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
bool untagged, struct netlink_ext_ack *extack)
{
if (untagged) {
/* We are adding an egress-tagged VLAN */
if (ocelot_port_uses_native_vlan(ocelot, port)) {
NL_SET_ERR_MSG_MOD(extack,
"Port with egress-tagged VLANs cannot have more than one egress-untagged (native) VLAN");
return -EBUSY;
}
} else {
/* We are adding an egress-tagged VLAN */
if (ocelot_port_num_untagged_vlans(ocelot, port) > 1) {
NL_SET_ERR_MSG_MOD(extack,
"Port with more than one egress-untagged VLAN cannot have egress-tagged VLANs");
return -EBUSY;
}
}
if (vid > OCELOT_RSV_VLAN_RANGE_START) {
NL_SET_ERR_MSG_MOD(extack,
"VLAN range 4000-4095 reserved for VLAN-unaware bridging");
return -EBUSY;
}
return 0;
}
EXPORT_SYMBOL(ocelot_vlan_prepare);
int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
bool untagged)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int err;
/* Ignore VID 0 added to our RX filter by the 8021q module, since
* that collides with OCELOT_STANDALONE_PVID and changes it from
* egress-untagged to egress-tagged.
*/
if (!vid)
return 0;
err = ocelot_vlan_member_add(ocelot, port, vid, untagged);
if (err)
return err;
/* Default ingress vlan classification */
if (pvid) {
err = ocelot_port_set_pvid(ocelot, port,
ocelot_bridge_vlan_find(ocelot, vid));
if (err)
return err;
} else if (ocelot_port->pvid_vlan &&
ocelot_bridge_vlan_find(ocelot, vid) == ocelot_port->pvid_vlan) {
err = ocelot_port_set_pvid(ocelot, port, NULL);
if (err)
return err;
}
/* Untagged egress vlan clasification */
ocelot_port_manage_port_tag(ocelot, port);
return 0;
}
EXPORT_SYMBOL(ocelot_vlan_add);
int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
bool del_pvid = false;
int err;
if (!vid)
return 0;
if (ocelot_port->pvid_vlan && ocelot_port->pvid_vlan->vid == vid)
del_pvid = true;
err = ocelot_vlan_member_del(ocelot, port, vid);
if (err)
return err;
/* Ingress */
if (del_pvid) {
err = ocelot_port_set_pvid(ocelot, port, NULL);
if (err)
return err;
}
/* Egress */
ocelot_port_manage_port_tag(ocelot, port);
return 0;
}
EXPORT_SYMBOL(ocelot_vlan_del);
static void ocelot_vlan_init(struct ocelot *ocelot)
{
unsigned long all_ports = GENMASK(ocelot->num_phys_ports - 1, 0);
u16 port, vid;
/* Clear VLAN table, by default all ports are members of all VLANs */
ocelot_write(ocelot, ANA_TABLES_VLANACCESS_CMD_INIT,
ANA_TABLES_VLANACCESS);
ocelot_vlant_wait_for_completion(ocelot);
/* Configure the port VLAN memberships */
for (vid = 1; vid < VLAN_N_VID; vid++)
ocelot_vlant_set_mask(ocelot, vid, 0);
/* We need VID 0 to get traffic on standalone ports.
* It is added automatically if the 8021q module is loaded, but we
* can't rely on that since it might not be.
*/
ocelot_vlant_set_mask(ocelot, OCELOT_STANDALONE_PVID, all_ports);
/* Set vlan ingress filter mask to all ports but the CPU port by
* default.
*/
ocelot_write(ocelot, all_ports, ANA_VLANMASK);
for (port = 0; port < ocelot->num_phys_ports; port++) {
ocelot_write_gix(ocelot, 0, REW_PORT_VLAN_CFG, port);
ocelot_write_gix(ocelot, 0, REW_TAG_CFG, port);
}
}
static u32 ocelot_read_eq_avail(struct ocelot *ocelot, int port)
{
return ocelot_read_rix(ocelot, QSYS_SW_STATUS, port);
}
static int ocelot_port_flush(struct ocelot *ocelot, int port)
{
unsigned int pause_ena;
int err, val;
/* Disable dequeuing from the egress queues */
ocelot_rmw_rix(ocelot, QSYS_PORT_MODE_DEQUEUE_DIS,
QSYS_PORT_MODE_DEQUEUE_DIS,
QSYS_PORT_MODE, port);
/* Disable flow control */
ocelot_fields_read(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, &pause_ena);
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 0);
/* Disable priority flow control */
ocelot_fields_write(ocelot, port,
QSYS_SWITCH_PORT_MODE_TX_PFC_ENA, 0);
/* Wait at least the time it takes to receive a frame of maximum length
* at the port.
* Worst-case delays for 10 kilobyte jumbo frames are:
* 8 ms on a 10M port
* 800 μs on a 100M port
* 80 μs on a 1G port
* 32 μs on a 2.5G port
*/
usleep_range(8000, 10000);
/* Disable half duplex backpressure. */
ocelot_rmw_rix(ocelot, 0, SYS_FRONT_PORT_MODE_HDX_MODE,
SYS_FRONT_PORT_MODE, port);
/* Flush the queues associated with the port. */
ocelot_rmw_gix(ocelot, REW_PORT_CFG_FLUSH_ENA, REW_PORT_CFG_FLUSH_ENA,
REW_PORT_CFG, port);
/* Enable dequeuing from the egress queues. */
ocelot_rmw_rix(ocelot, 0, QSYS_PORT_MODE_DEQUEUE_DIS, QSYS_PORT_MODE,
port);
/* Wait until flushing is complete. */
err = read_poll_timeout(ocelot_read_eq_avail, val, !val,
100, 2000000, false, ocelot, port);
/* Clear flushing again. */
ocelot_rmw_gix(ocelot, 0, REW_PORT_CFG_FLUSH_ENA, REW_PORT_CFG, port);
/* Re-enable flow control */
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, pause_ena);
return err;
}
int ocelot_port_configure_serdes(struct ocelot *ocelot, int port,
struct device_node *portnp)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct device *dev = ocelot->dev;
int err;
/* Ensure clock signals and speed are set on all QSGMII links */
if (ocelot_port->phy_mode == PHY_INTERFACE_MODE_QSGMII)
ocelot_port_rmwl(ocelot_port, 0,
DEV_CLOCK_CFG_MAC_TX_RST |
DEV_CLOCK_CFG_MAC_RX_RST,
DEV_CLOCK_CFG);
if (ocelot_port->phy_mode != PHY_INTERFACE_MODE_INTERNAL) {
struct phy *serdes = of_phy_get(portnp, NULL);
if (IS_ERR(serdes)) {
err = PTR_ERR(serdes);
dev_err_probe(dev, err,
"missing SerDes phys for port %d\n",
port);
return err;
}
err = phy_set_mode_ext(serdes, PHY_MODE_ETHERNET,
ocelot_port->phy_mode);
of_phy_put(serdes);
if (err) {
dev_err(dev, "Could not SerDes mode on port %d: %pe\n",
port, ERR_PTR(err));
return err;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_configure_serdes);
void ocelot_phylink_mac_config(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
const struct phylink_link_state *state)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
/* Disable HDX fast control */
ocelot_port_writel(ocelot_port, DEV_PORT_MISC_HDX_FAST_DIS,
DEV_PORT_MISC);
/* SGMII only for now */
ocelot_port_writel(ocelot_port, PCS1G_MODE_CFG_SGMII_MODE_ENA,
PCS1G_MODE_CFG);
ocelot_port_writel(ocelot_port, PCS1G_SD_CFG_SD_SEL, PCS1G_SD_CFG);
/* Enable PCS */
ocelot_port_writel(ocelot_port, PCS1G_CFG_PCS_ENA, PCS1G_CFG);
/* No aneg on SGMII */
ocelot_port_writel(ocelot_port, 0, PCS1G_ANEG_CFG);
/* No loopback */
ocelot_port_writel(ocelot_port, 0, PCS1G_LB_CFG);
}
EXPORT_SYMBOL_GPL(ocelot_phylink_mac_config);
void ocelot_phylink_mac_link_down(struct ocelot *ocelot, int port,
unsigned int link_an_mode,
phy_interface_t interface,
unsigned long quirks)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int err;
ocelot_port->speed = SPEED_UNKNOWN;
ocelot_port_rmwl(ocelot_port, 0, DEV_MAC_ENA_CFG_RX_ENA,
DEV_MAC_ENA_CFG);
if (ocelot->ops->cut_through_fwd) {
mutex_lock(&ocelot->fwd_domain_lock);
ocelot->ops->cut_through_fwd(ocelot);
mutex_unlock(&ocelot->fwd_domain_lock);
}
ocelot_fields_write(ocelot, port, QSYS_SWITCH_PORT_MODE_PORT_ENA, 0);
err = ocelot_port_flush(ocelot, port);
if (err)
dev_err(ocelot->dev, "failed to flush port %d: %d\n",
port, err);
/* Put the port in reset. */
if (interface != PHY_INTERFACE_MODE_QSGMII ||
!(quirks & OCELOT_QUIRK_QSGMII_PORTS_MUST_BE_UP))
ocelot_port_rmwl(ocelot_port,
DEV_CLOCK_CFG_MAC_TX_RST |
DEV_CLOCK_CFG_MAC_RX_RST,
DEV_CLOCK_CFG_MAC_TX_RST |
DEV_CLOCK_CFG_MAC_RX_RST,
DEV_CLOCK_CFG);
}
EXPORT_SYMBOL_GPL(ocelot_phylink_mac_link_down);
void ocelot_phylink_mac_link_up(struct ocelot *ocelot, int port,
struct phy_device *phydev,
unsigned int link_an_mode,
phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause,
unsigned long quirks)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int mac_speed, mode = 0;
u32 mac_fc_cfg;
ocelot_port->speed = speed;
/* The MAC might be integrated in systems where the MAC speed is fixed
* and it's the PCS who is performing the rate adaptation, so we have
* to write "1000Mbps" into the LINK_SPEED field of DEV_CLOCK_CFG
* (which is also its default value).
*/
if ((quirks & OCELOT_QUIRK_PCS_PERFORMS_RATE_ADAPTATION) ||
speed == SPEED_1000) {
mac_speed = OCELOT_SPEED_1000;
mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA;
} else if (speed == SPEED_2500) {
mac_speed = OCELOT_SPEED_2500;
mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA;
} else if (speed == SPEED_100) {
mac_speed = OCELOT_SPEED_100;
} else {
mac_speed = OCELOT_SPEED_10;
}
if (duplex == DUPLEX_FULL)
mode |= DEV_MAC_MODE_CFG_FDX_ENA;
ocelot_port_writel(ocelot_port, mode, DEV_MAC_MODE_CFG);
/* Take port out of reset by clearing the MAC_TX_RST, MAC_RX_RST and
* PORT_RST bits in DEV_CLOCK_CFG.
*/
ocelot_port_writel(ocelot_port, DEV_CLOCK_CFG_LINK_SPEED(mac_speed),
DEV_CLOCK_CFG);
switch (speed) {
case SPEED_10:
mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_10);
break;
case SPEED_100:
mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_100);
break;
case SPEED_1000:
case SPEED_2500:
mac_fc_cfg = SYS_MAC_FC_CFG_FC_LINK_SPEED(OCELOT_SPEED_1000);
break;
default:
dev_err(ocelot->dev, "Unsupported speed on port %d: %d\n",
port, speed);
return;
}
if (rx_pause)
mac_fc_cfg |= SYS_MAC_FC_CFG_RX_FC_ENA;
if (tx_pause)
mac_fc_cfg |= SYS_MAC_FC_CFG_TX_FC_ENA |
SYS_MAC_FC_CFG_PAUSE_VAL_CFG(0xffff) |
SYS_MAC_FC_CFG_FC_LATENCY_CFG(0x7) |
SYS_MAC_FC_CFG_ZERO_PAUSE_ENA;
/* Flow control. Link speed is only used here to evaluate the time
* specification in incoming pause frames.
*/
ocelot_write_rix(ocelot, mac_fc_cfg, SYS_MAC_FC_CFG, port);
ocelot_write_rix(ocelot, 0, ANA_POL_FLOWC, port);
/* Don't attempt to send PAUSE frames on the NPI port, it's broken */
if (port != ocelot->npi)
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA,
tx_pause);
/* Undo the effects of ocelot_phylink_mac_link_down:
* enable MAC module
*/
ocelot_port_writel(ocelot_port, DEV_MAC_ENA_CFG_RX_ENA |
DEV_MAC_ENA_CFG_TX_ENA, DEV_MAC_ENA_CFG);
/* If the port supports cut-through forwarding, update the masks before
* enabling forwarding on the port.
*/
if (ocelot->ops->cut_through_fwd) {
mutex_lock(&ocelot->fwd_domain_lock);
/* Workaround for hardware bug - FP doesn't work
* at all link speeds for all PHY modes. The function
* below also calls ocelot->ops->cut_through_fwd(),
* so we don't need to do it twice.
*/
ocelot_port_update_active_preemptible_tcs(ocelot, port);
mutex_unlock(&ocelot->fwd_domain_lock);
}
/* Core: Enable port for frame transfer */
ocelot_fields_write(ocelot, port,
QSYS_SWITCH_PORT_MODE_PORT_ENA, 1);
}
EXPORT_SYMBOL_GPL(ocelot_phylink_mac_link_up);
static int ocelot_rx_frame_word(struct ocelot *ocelot, u8 grp, bool ifh,
u32 *rval)
{
u32 bytes_valid, val;
val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
if (val == XTR_NOT_READY) {
if (ifh)
return -EIO;
do {
val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
} while (val == XTR_NOT_READY);
}
switch (val) {
case XTR_ABORT:
return -EIO;
case XTR_EOF_0:
case XTR_EOF_1:
case XTR_EOF_2:
case XTR_EOF_3:
case XTR_PRUNED:
bytes_valid = XTR_VALID_BYTES(val);
val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
if (val == XTR_ESCAPE)
*rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
else
*rval = val;
return bytes_valid;
case XTR_ESCAPE:
*rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
return 4;
default:
*rval = val;
return 4;
}
}
static int ocelot_xtr_poll_xfh(struct ocelot *ocelot, int grp, u32 *xfh)
{
int i, err = 0;
for (i = 0; i < OCELOT_TAG_LEN / 4; i++) {
err = ocelot_rx_frame_word(ocelot, grp, true, &xfh[i]);
if (err != 4)
return (err < 0) ? err : -EIO;
}
return 0;
}
void ocelot_ptp_rx_timestamp(struct ocelot *ocelot, struct sk_buff *skb,
u64 timestamp)
{
struct skb_shared_hwtstamps *shhwtstamps;
u64 tod_in_ns, full_ts_in_ns;
struct timespec64 ts;
ocelot_ptp_gettime64(&ocelot->ptp_info, &ts);
tod_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec);
if ((tod_in_ns & 0xffffffff) < timestamp)
full_ts_in_ns = (((tod_in_ns >> 32) - 1) << 32) |
timestamp;
else
full_ts_in_ns = (tod_in_ns & GENMASK_ULL(63, 32)) |
timestamp;
shhwtstamps = skb_hwtstamps(skb);
memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
shhwtstamps->hwtstamp = full_ts_in_ns;
}
EXPORT_SYMBOL(ocelot_ptp_rx_timestamp);
void ocelot_lock_inj_grp(struct ocelot *ocelot, int grp)
__acquires(&ocelot->inj_lock)
{
spin_lock(&ocelot->inj_lock);
}
EXPORT_SYMBOL_GPL(ocelot_lock_inj_grp);
void ocelot_unlock_inj_grp(struct ocelot *ocelot, int grp)
__releases(&ocelot->inj_lock)
{
spin_unlock(&ocelot->inj_lock);
}
EXPORT_SYMBOL_GPL(ocelot_unlock_inj_grp);
void ocelot_lock_xtr_grp(struct ocelot *ocelot, int grp)
__acquires(&ocelot->inj_lock)
{
spin_lock(&ocelot->inj_lock);
}
EXPORT_SYMBOL_GPL(ocelot_lock_xtr_grp);
void ocelot_unlock_xtr_grp(struct ocelot *ocelot, int grp)
__releases(&ocelot->inj_lock)
{
spin_unlock(&ocelot->inj_lock);
}
EXPORT_SYMBOL_GPL(ocelot_unlock_xtr_grp);
void ocelot_lock_xtr_grp_bh(struct ocelot *ocelot, int grp)
__acquires(&ocelot->xtr_lock)
{
spin_lock_bh(&ocelot->xtr_lock);
}
EXPORT_SYMBOL_GPL(ocelot_lock_xtr_grp_bh);
void ocelot_unlock_xtr_grp_bh(struct ocelot *ocelot, int grp)
__releases(&ocelot->xtr_lock)
{
spin_unlock_bh(&ocelot->xtr_lock);
}
EXPORT_SYMBOL_GPL(ocelot_unlock_xtr_grp_bh);
int ocelot_xtr_poll_frame(struct ocelot *ocelot, int grp, struct sk_buff **nskb)
{
u64 timestamp, src_port, len;
u32 xfh[OCELOT_TAG_LEN / 4];
struct net_device *dev;
struct sk_buff *skb;
int sz, buf_len;
u32 val, *buf;
int err;
lockdep_assert_held(&ocelot->xtr_lock);
err = ocelot_xtr_poll_xfh(ocelot, grp, xfh);
if (err)
return err;
ocelot_xfh_get_src_port(xfh, &src_port);
ocelot_xfh_get_len(xfh, &len);
ocelot_xfh_get_rew_val(xfh, &timestamp);
if (WARN_ON(src_port >= ocelot->num_phys_ports))
return -EINVAL;
dev = ocelot->ops->port_to_netdev(ocelot, src_port);
if (!dev)
return -EINVAL;
skb = netdev_alloc_skb(dev, len);
if (unlikely(!skb)) {
netdev_err(dev, "Unable to allocate sk_buff\n");
return -ENOMEM;
}
buf_len = len - ETH_FCS_LEN;
buf = (u32 *)skb_put(skb, buf_len);
len = 0;
do {
sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
if (sz < 0) {
err = sz;
goto out_free_skb;
}
*buf++ = val;
len += sz;
} while (len < buf_len);
/* Read the FCS */
sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
if (sz < 0) {
err = sz;
goto out_free_skb;
}
/* Update the statistics if part of the FCS was read before */
len -= ETH_FCS_LEN - sz;
if (unlikely(dev->features & NETIF_F_RXFCS)) {
buf = (u32 *)skb_put(skb, ETH_FCS_LEN);
*buf = val;
}
if (ocelot->ptp)
ocelot_ptp_rx_timestamp(ocelot, skb, timestamp);
/* Everything we see on an interface that is in the HW bridge
* has already been forwarded.
*/
if (ocelot->ports[src_port]->bridge)
skb->offload_fwd_mark = 1;
skb->protocol = eth_type_trans(skb, dev);
*nskb = skb;
return 0;
out_free_skb:
kfree_skb(skb);
return err;
}
EXPORT_SYMBOL(ocelot_xtr_poll_frame);
bool ocelot_can_inject(struct ocelot *ocelot, int grp)
{
u32 val = ocelot_read(ocelot, QS_INJ_STATUS);
lockdep_assert_held(&ocelot->inj_lock);
if (!(val & QS_INJ_STATUS_FIFO_RDY(BIT(grp))))
return false;
if (val & QS_INJ_STATUS_WMARK_REACHED(BIT(grp)))
return false;
return true;
}
EXPORT_SYMBOL(ocelot_can_inject);
/**
* ocelot_ifh_set_basic - Set basic information in Injection Frame Header
* @ifh: Pointer to Injection Frame Header memory
* @ocelot: Switch private data structure
* @port: Egress port number
* @rew_op: Egress rewriter operation for PTP
* @skb: Pointer to socket buffer (packet)
*
* Populate the Injection Frame Header with basic information for this skb: the
* analyzer bypass bit, destination port, VLAN info, egress rewriter info.
*/
void ocelot_ifh_set_basic(void *ifh, struct ocelot *ocelot, int port,
u32 rew_op, struct sk_buff *skb)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct net_device *dev = skb->dev;
u64 vlan_tci, tag_type;
int qos_class;
ocelot_xmit_get_vlan_info(skb, ocelot_port->bridge, &vlan_tci,
&tag_type);
qos_class = netdev_get_num_tc(dev) ?
netdev_get_prio_tc_map(dev, skb->priority) : skb->priority;
memset(ifh, 0, OCELOT_TAG_LEN);
ocelot_ifh_set_bypass(ifh, 1);
ocelot_ifh_set_src(ifh, ocelot->num_phys_ports);
ocelot_ifh_set_dest(ifh, BIT_ULL(port));
ocelot_ifh_set_qos_class(ifh, qos_class);
ocelot_ifh_set_tag_type(ifh, tag_type);
ocelot_ifh_set_vlan_tci(ifh, vlan_tci);
if (rew_op)
ocelot_ifh_set_rew_op(ifh, rew_op);
}
EXPORT_SYMBOL(ocelot_ifh_set_basic);
void ocelot_port_inject_frame(struct ocelot *ocelot, int port, int grp,
u32 rew_op, struct sk_buff *skb)
{
u32 ifh[OCELOT_TAG_LEN / 4];
unsigned int i, count, last;
lockdep_assert_held(&ocelot->inj_lock);
ocelot_write_rix(ocelot, QS_INJ_CTRL_GAP_SIZE(1) |
QS_INJ_CTRL_SOF, QS_INJ_CTRL, grp);
ocelot_ifh_set_basic(ifh, ocelot, port, rew_op, skb);
for (i = 0; i < OCELOT_TAG_LEN / 4; i++)
ocelot_write_rix(ocelot, ifh[i], QS_INJ_WR, grp);
count = DIV_ROUND_UP(skb->len, 4);
last = skb->len % 4;
for (i = 0; i < count; i++)
ocelot_write_rix(ocelot, ((u32 *)skb->data)[i], QS_INJ_WR, grp);
/* Add padding */
while (i < (OCELOT_BUFFER_CELL_SZ / 4)) {
ocelot_write_rix(ocelot, 0, QS_INJ_WR, grp);
i++;
}
/* Indicate EOF and valid bytes in last word */
ocelot_write_rix(ocelot, QS_INJ_CTRL_GAP_SIZE(1) |
QS_INJ_CTRL_VLD_BYTES(skb->len < OCELOT_BUFFER_CELL_SZ ? 0 : last) |
QS_INJ_CTRL_EOF,
QS_INJ_CTRL, grp);
/* Add dummy CRC */
ocelot_write_rix(ocelot, 0, QS_INJ_WR, grp);
skb_tx_timestamp(skb);
skb->dev->stats.tx_packets++;
skb->dev->stats.tx_bytes += skb->len;
}
EXPORT_SYMBOL(ocelot_port_inject_frame);
void ocelot_drain_cpu_queue(struct ocelot *ocelot, int grp)
{
lockdep_assert_held(&ocelot->xtr_lock);
while (ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp))
ocelot_read_rix(ocelot, QS_XTR_RD, grp);
}
EXPORT_SYMBOL(ocelot_drain_cpu_queue);
int ocelot_fdb_add(struct ocelot *ocelot, int port, const unsigned char *addr,
u16 vid, const struct net_device *bridge)
{
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
return ocelot_mact_learn(ocelot, port, addr, vid, ENTRYTYPE_LOCKED);
}
EXPORT_SYMBOL(ocelot_fdb_add);
int ocelot_fdb_del(struct ocelot *ocelot, int port, const unsigned char *addr,
u16 vid, const struct net_device *bridge)
{
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
return ocelot_mact_forget(ocelot, addr, vid);
}
EXPORT_SYMBOL(ocelot_fdb_del);
/* Caller must hold &ocelot->mact_lock */
static int ocelot_mact_read(struct ocelot *ocelot, int port, int row, int col,
struct ocelot_mact_entry *entry)
{
u32 val, dst, macl, mach;
char mac[ETH_ALEN];
/* Set row and column to read from */
ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_M_INDEX, row);
ocelot_field_write(ocelot, ANA_TABLES_MACTINDX_BUCKET, col);
/* Issue a read command */
ocelot_write(ocelot,
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_READ),
ANA_TABLES_MACACCESS);
if (ocelot_mact_wait_for_completion(ocelot))
return -ETIMEDOUT;
/* Read the entry flags */
val = ocelot_read(ocelot, ANA_TABLES_MACACCESS);
if (!(val & ANA_TABLES_MACACCESS_VALID))
return -EINVAL;
/* If the entry read has another port configured as its destination,
* do not report it.
*/
dst = (val & ANA_TABLES_MACACCESS_DEST_IDX_M) >> 3;
if (dst != port)
return -EINVAL;
/* Get the entry's MAC address and VLAN id */
macl = ocelot_read(ocelot, ANA_TABLES_MACLDATA);
mach = ocelot_read(ocelot, ANA_TABLES_MACHDATA);
mac[0] = (mach >> 8) & 0xff;
mac[1] = (mach >> 0) & 0xff;
mac[2] = (macl >> 24) & 0xff;
mac[3] = (macl >> 16) & 0xff;
mac[4] = (macl >> 8) & 0xff;
mac[5] = (macl >> 0) & 0xff;
entry->vid = (mach >> 16) & 0xfff;
ether_addr_copy(entry->mac, mac);
return 0;
}
int ocelot_mact_flush(struct ocelot *ocelot, int port)
{
int err;
mutex_lock(&ocelot->mact_lock);
/* Program ageing filter for a single port */
ocelot_write(ocelot, ANA_ANAGEFIL_PID_EN | ANA_ANAGEFIL_PID_VAL(port),
ANA_ANAGEFIL);
/* Flushing dynamic FDB entries requires two successive age scans */
ocelot_write(ocelot,
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_AGE),
ANA_TABLES_MACACCESS);
err = ocelot_mact_wait_for_completion(ocelot);
if (err) {
mutex_unlock(&ocelot->mact_lock);
return err;
}
/* And second... */
ocelot_write(ocelot,
ANA_TABLES_MACACCESS_MAC_TABLE_CMD(MACACCESS_CMD_AGE),
ANA_TABLES_MACACCESS);
err = ocelot_mact_wait_for_completion(ocelot);
/* Restore ageing filter */
ocelot_write(ocelot, 0, ANA_ANAGEFIL);
mutex_unlock(&ocelot->mact_lock);
return err;
}
EXPORT_SYMBOL_GPL(ocelot_mact_flush);
int ocelot_fdb_dump(struct ocelot *ocelot, int port,
dsa_fdb_dump_cb_t *cb, void *data)
{
int err = 0;
int i, j;
/* We could take the lock just around ocelot_mact_read, but doing so
* thousands of times in a row seems rather pointless and inefficient.
*/
mutex_lock(&ocelot->mact_lock);
/* Loop through all the mac tables entries. */
for (i = 0; i < ocelot->num_mact_rows; i++) {
for (j = 0; j < 4; j++) {
struct ocelot_mact_entry entry;
bool is_static;
err = ocelot_mact_read(ocelot, port, i, j, &entry);
/* If the entry is invalid (wrong port, invalid...),
* skip it.
*/
if (err == -EINVAL)
continue;
else if (err)
break;
is_static = (entry.type == ENTRYTYPE_LOCKED);
/* Hide the reserved VLANs used for
* VLAN-unaware bridging.
*/
if (entry.vid > OCELOT_RSV_VLAN_RANGE_START)
entry.vid = 0;
err = cb(entry.mac, entry.vid, is_static, data);
if (err)
break;
}
}
mutex_unlock(&ocelot->mact_lock);
return err;
}
EXPORT_SYMBOL(ocelot_fdb_dump);
int ocelot_trap_add(struct ocelot *ocelot, int port,
unsigned long cookie, bool take_ts,
void (*populate)(struct ocelot_vcap_filter *f))
{
struct ocelot_vcap_block *block_vcap_is2;
struct ocelot_vcap_filter *trap;
bool new = false;
int err;
block_vcap_is2 = &ocelot->block[VCAP_IS2];
trap = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, cookie,
false);
if (!trap) {
trap = kzalloc_obj(*trap);
if (!trap)
return -ENOMEM;
populate(trap);
trap->prio = 1;
trap->id.cookie = cookie;
trap->id.tc_offload = false;
trap->block_id = VCAP_IS2;
trap->type = OCELOT_VCAP_FILTER_OFFLOAD;
trap->lookup = 0;
trap->action.cpu_copy_ena = true;
trap->action.mask_mode = OCELOT_MASK_MODE_PERMIT_DENY;
trap->action.port_mask = 0;
trap->take_ts = take_ts;
trap->is_trap = true;
new = true;
}
trap->ingress_port_mask |= BIT(port);
if (new)
err = ocelot_vcap_filter_add(ocelot, trap, NULL);
else
err = ocelot_vcap_filter_replace(ocelot, trap);
if (err) {
trap->ingress_port_mask &= ~BIT(port);
if (!trap->ingress_port_mask)
kfree(trap);
return err;
}
return 0;
}
int ocelot_trap_del(struct ocelot *ocelot, int port, unsigned long cookie)
{
struct ocelot_vcap_block *block_vcap_is2;
struct ocelot_vcap_filter *trap;
block_vcap_is2 = &ocelot->block[VCAP_IS2];
trap = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, cookie,
false);
if (!trap)
return 0;
trap->ingress_port_mask &= ~BIT(port);
if (!trap->ingress_port_mask)
return ocelot_vcap_filter_del(ocelot, trap);
return ocelot_vcap_filter_replace(ocelot, trap);
}
static u32 ocelot_get_bond_mask(struct ocelot *ocelot, struct net_device *bond)
{
u32 mask = 0;
int port;
lockdep_assert_held(&ocelot->fwd_domain_lock);
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port)
continue;
if (ocelot_port->bond == bond)
mask |= BIT(port);
}
return mask;
}
/* The logical port number of a LAG is equal to the lowest numbered physical
* port ID present in that LAG. It may change if that port ever leaves the LAG.
*/
int ocelot_bond_get_id(struct ocelot *ocelot, struct net_device *bond)
{
int bond_mask = ocelot_get_bond_mask(ocelot, bond);
if (!bond_mask)
return -ENOENT;
return __ffs(bond_mask);
}
EXPORT_SYMBOL_GPL(ocelot_bond_get_id);
/* Returns the mask of user ports assigned to this DSA tag_8021q CPU port.
* Note that when CPU ports are in a LAG, the user ports are assigned to the
* 'primary' CPU port, the one whose physical port number gives the logical
* port number of the LAG.
*
* We leave PGID_SRC poorly configured for the 'secondary' CPU port in the LAG
* (to which no user port is assigned), but it appears that forwarding from
* this secondary CPU port looks at the PGID_SRC associated with the logical
* port ID that it's assigned to, which *is* configured properly.
*/
static u32 ocelot_dsa_8021q_cpu_assigned_ports(struct ocelot *ocelot,
struct ocelot_port *cpu)
{
u32 mask = 0;
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port)
continue;
if (ocelot_port->dsa_8021q_cpu == cpu)
mask |= BIT(port);
}
if (cpu->bond)
mask &= ~ocelot_get_bond_mask(ocelot, cpu->bond);
return mask;
}
/* Returns the DSA tag_8021q CPU port that the given port is assigned to,
* or the bit mask of CPU ports if said CPU port is in a LAG.
*/
u32 ocelot_port_assigned_dsa_8021q_cpu_mask(struct ocelot *ocelot, int port)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct ocelot_port *cpu_port = ocelot_port->dsa_8021q_cpu;
if (!cpu_port)
return 0;
if (cpu_port->bond)
return ocelot_get_bond_mask(ocelot, cpu_port->bond);
return BIT(cpu_port->index);
}
EXPORT_SYMBOL_GPL(ocelot_port_assigned_dsa_8021q_cpu_mask);
u32 ocelot_get_bridge_fwd_mask(struct ocelot *ocelot, int src_port)
{
struct ocelot_port *ocelot_port = ocelot->ports[src_port];
const struct net_device *bridge;
u32 mask = 0;
int port;
if (!ocelot_port || ocelot_port->stp_state != BR_STATE_FORWARDING)
return 0;
bridge = ocelot_port->bridge;
if (!bridge)
return 0;
for (port = 0; port < ocelot->num_phys_ports; port++) {
ocelot_port = ocelot->ports[port];
if (!ocelot_port)
continue;
if (ocelot_port->stp_state == BR_STATE_FORWARDING &&
ocelot_port->bridge == bridge)
mask |= BIT(port);
}
return mask;
}
EXPORT_SYMBOL_GPL(ocelot_get_bridge_fwd_mask);
static void ocelot_apply_bridge_fwd_mask(struct ocelot *ocelot, bool joining)
{
int port;
lockdep_assert_held(&ocelot->fwd_domain_lock);
/* If cut-through forwarding is supported, update the masks before a
* port joins the forwarding domain, to avoid potential underruns if it
* has the highest speed from the new domain.
*/
if (joining && ocelot->ops->cut_through_fwd)
ocelot->ops->cut_through_fwd(ocelot);
/* Apply FWD mask. The loop is needed to add/remove the current port as
* a source for the other ports.
*/
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
unsigned long mask;
if (!ocelot_port) {
/* Unused ports can't send anywhere */
mask = 0;
} else if (ocelot_port->is_dsa_8021q_cpu) {
/* The DSA tag_8021q CPU ports need to be able to
* forward packets to all ports assigned to them.
*/
mask = ocelot_dsa_8021q_cpu_assigned_ports(ocelot,
ocelot_port);
} else if (ocelot_port->bridge) {
struct net_device *bond = ocelot_port->bond;
mask = ocelot_get_bridge_fwd_mask(ocelot, port);
mask &= ~BIT(port);
mask |= ocelot_port_assigned_dsa_8021q_cpu_mask(ocelot,
port);
if (bond)
mask &= ~ocelot_get_bond_mask(ocelot, bond);
} else {
/* Standalone ports forward only to DSA tag_8021q CPU
* ports (if those exist), or to the hardware CPU port
* module otherwise.
*/
mask = ocelot_port_assigned_dsa_8021q_cpu_mask(ocelot,
port);
}
ocelot_write_rix(ocelot, mask, ANA_PGID_PGID, PGID_SRC + port);
}
/* If cut-through forwarding is supported and a port is leaving, there
* is a chance that cut-through was disabled on the other ports due to
* the port which is leaving (it has a higher link speed). We need to
* update the cut-through masks of the remaining ports no earlier than
* after the port has left, to prevent underruns from happening between
* the cut-through update and the forwarding domain update.
*/
if (!joining && ocelot->ops->cut_through_fwd)
ocelot->ops->cut_through_fwd(ocelot);
}
/* Update PGID_CPU which is the destination port mask used for whitelisting
* unicast addresses filtered towards the host. In the normal and NPI modes,
* this points to the analyzer entry for the CPU port module, while in DSA
* tag_8021q mode, it is a bit mask of all active CPU ports.
* PGID_SRC will take care of forwarding a packet from one user port to
* no more than a single CPU port.
*/
static void ocelot_update_pgid_cpu(struct ocelot *ocelot)
{
int pgid_cpu = 0;
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port || !ocelot_port->is_dsa_8021q_cpu)
continue;
pgid_cpu |= BIT(port);
}
if (!pgid_cpu)
pgid_cpu = BIT(ocelot->num_phys_ports);
ocelot_write_rix(ocelot, pgid_cpu, ANA_PGID_PGID, PGID_CPU);
}
void ocelot_port_setup_dsa_8021q_cpu(struct ocelot *ocelot, int cpu)
{
struct ocelot_port *cpu_port = ocelot->ports[cpu];
u16 vid;
mutex_lock(&ocelot->fwd_domain_lock);
cpu_port->is_dsa_8021q_cpu = true;
for (vid = OCELOT_RSV_VLAN_RANGE_START; vid < VLAN_N_VID; vid++)
ocelot_vlan_member_add(ocelot, cpu, vid, true);
ocelot_update_pgid_cpu(ocelot);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL_GPL(ocelot_port_setup_dsa_8021q_cpu);
void ocelot_port_teardown_dsa_8021q_cpu(struct ocelot *ocelot, int cpu)
{
struct ocelot_port *cpu_port = ocelot->ports[cpu];
u16 vid;
mutex_lock(&ocelot->fwd_domain_lock);
cpu_port->is_dsa_8021q_cpu = false;
for (vid = OCELOT_RSV_VLAN_RANGE_START; vid < VLAN_N_VID; vid++)
ocelot_vlan_member_del(ocelot, cpu_port->index, vid);
ocelot_update_pgid_cpu(ocelot);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL_GPL(ocelot_port_teardown_dsa_8021q_cpu);
void ocelot_port_assign_dsa_8021q_cpu(struct ocelot *ocelot, int port,
int cpu)
{
struct ocelot_port *cpu_port = ocelot->ports[cpu];
mutex_lock(&ocelot->fwd_domain_lock);
ocelot->ports[port]->dsa_8021q_cpu = cpu_port;
ocelot_apply_bridge_fwd_mask(ocelot, true);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL_GPL(ocelot_port_assign_dsa_8021q_cpu);
void ocelot_port_unassign_dsa_8021q_cpu(struct ocelot *ocelot, int port)
{
mutex_lock(&ocelot->fwd_domain_lock);
ocelot->ports[port]->dsa_8021q_cpu = NULL;
ocelot_apply_bridge_fwd_mask(ocelot, true);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL_GPL(ocelot_port_unassign_dsa_8021q_cpu);
void ocelot_bridge_stp_state_set(struct ocelot *ocelot, int port, u8 state)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
u32 learn_ena = 0;
mutex_lock(&ocelot->fwd_domain_lock);
ocelot_port->stp_state = state;
if ((state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING) &&
ocelot_port->learn_ena)
learn_ena = ANA_PORT_PORT_CFG_LEARN_ENA;
ocelot_rmw_gix(ocelot, learn_ena, ANA_PORT_PORT_CFG_LEARN_ENA,
ANA_PORT_PORT_CFG, port);
ocelot_apply_bridge_fwd_mask(ocelot, state == BR_STATE_FORWARDING);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_bridge_stp_state_set);
void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs)
{
unsigned int age_period = ANA_AUTOAGE_AGE_PERIOD(msecs / 2000);
/* Setting AGE_PERIOD to zero effectively disables automatic aging,
* which is clearly not what our intention is. So avoid that.
*/
if (!age_period)
age_period = 1;
ocelot_rmw(ocelot, age_period, ANA_AUTOAGE_AGE_PERIOD_M, ANA_AUTOAGE);
}
EXPORT_SYMBOL(ocelot_set_ageing_time);
static struct ocelot_multicast *ocelot_multicast_get(struct ocelot *ocelot,
const unsigned char *addr,
u16 vid)
{
struct ocelot_multicast *mc;
list_for_each_entry(mc, &ocelot->multicast, list) {
if (ether_addr_equal(mc->addr, addr) && mc->vid == vid)
return mc;
}
return NULL;
}
static enum macaccess_entry_type ocelot_classify_mdb(const unsigned char *addr)
{
if (addr[0] == 0x01 && addr[1] == 0x00 && addr[2] == 0x5e)
return ENTRYTYPE_MACv4;
if (addr[0] == 0x33 && addr[1] == 0x33)
return ENTRYTYPE_MACv6;
return ENTRYTYPE_LOCKED;
}
static struct ocelot_pgid *ocelot_pgid_alloc(struct ocelot *ocelot, int index,
unsigned long ports)
{
struct ocelot_pgid *pgid;
pgid = kzalloc_obj(*pgid);
if (!pgid)
return ERR_PTR(-ENOMEM);
pgid->ports = ports;
pgid->index = index;
refcount_set(&pgid->refcount, 1);
list_add_tail(&pgid->list, &ocelot->pgids);
return pgid;
}
static void ocelot_pgid_free(struct ocelot *ocelot, struct ocelot_pgid *pgid)
{
if (!refcount_dec_and_test(&pgid->refcount))
return;
list_del(&pgid->list);
kfree(pgid);
}
static struct ocelot_pgid *ocelot_mdb_get_pgid(struct ocelot *ocelot,
const struct ocelot_multicast *mc)
{
struct ocelot_pgid *pgid;
int index;
/* According to VSC7514 datasheet 3.9.1.5 IPv4 Multicast Entries and
* 3.9.1.6 IPv6 Multicast Entries, "Instead of a lookup in the
* destination mask table (PGID), the destination set is programmed as
* part of the entry MAC address.", and the DEST_IDX is set to 0.
*/
if (mc->entry_type == ENTRYTYPE_MACv4 ||
mc->entry_type == ENTRYTYPE_MACv6)
return ocelot_pgid_alloc(ocelot, 0, mc->ports);
list_for_each_entry(pgid, &ocelot->pgids, list) {
/* When searching for a nonreserved multicast PGID, ignore the
* dummy PGID of zero that we have for MACv4/MACv6 entries
*/
if (pgid->index && pgid->ports == mc->ports) {
refcount_inc(&pgid->refcount);
return pgid;
}
}
/* Search for a free index in the nonreserved multicast PGID area */
for_each_nonreserved_multicast_dest_pgid(ocelot, index) {
bool used = false;
list_for_each_entry(pgid, &ocelot->pgids, list) {
if (pgid->index == index) {
used = true;
break;
}
}
if (!used)
return ocelot_pgid_alloc(ocelot, index, mc->ports);
}
return ERR_PTR(-ENOSPC);
}
static void ocelot_encode_ports_to_mdb(unsigned char *addr,
struct ocelot_multicast *mc)
{
ether_addr_copy(addr, mc->addr);
if (mc->entry_type == ENTRYTYPE_MACv4) {
addr[0] = 0;
addr[1] = mc->ports >> 8;
addr[2] = mc->ports & 0xff;
} else if (mc->entry_type == ENTRYTYPE_MACv6) {
addr[0] = mc->ports >> 8;
addr[1] = mc->ports & 0xff;
}
}
int ocelot_port_mdb_add(struct ocelot *ocelot, int port,
const struct switchdev_obj_port_mdb *mdb,
const struct net_device *bridge)
{
unsigned char addr[ETH_ALEN];
struct ocelot_multicast *mc;
struct ocelot_pgid *pgid;
u16 vid = mdb->vid;
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
if (!mc) {
/* New entry */
mc = devm_kzalloc(ocelot->dev, sizeof(*mc), GFP_KERNEL);
if (!mc)
return -ENOMEM;
mc->entry_type = ocelot_classify_mdb(mdb->addr);
ether_addr_copy(mc->addr, mdb->addr);
mc->vid = vid;
list_add_tail(&mc->list, &ocelot->multicast);
} else {
/* Existing entry. Clean up the current port mask from
* hardware now, because we'll be modifying it.
*/
ocelot_pgid_free(ocelot, mc->pgid);
ocelot_encode_ports_to_mdb(addr, mc);
ocelot_mact_forget(ocelot, addr, vid);
}
mc->ports |= BIT(port);
pgid = ocelot_mdb_get_pgid(ocelot, mc);
if (IS_ERR(pgid)) {
dev_err(ocelot->dev,
"Cannot allocate PGID for mdb %pM vid %d\n",
mc->addr, mc->vid);
devm_kfree(ocelot->dev, mc);
return PTR_ERR(pgid);
}
mc->pgid = pgid;
ocelot_encode_ports_to_mdb(addr, mc);
if (mc->entry_type != ENTRYTYPE_MACv4 &&
mc->entry_type != ENTRYTYPE_MACv6)
ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
pgid->index);
return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_add);
int ocelot_port_mdb_del(struct ocelot *ocelot, int port,
const struct switchdev_obj_port_mdb *mdb,
const struct net_device *bridge)
{
unsigned char addr[ETH_ALEN];
struct ocelot_multicast *mc;
struct ocelot_pgid *pgid;
u16 vid = mdb->vid;
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
mc = ocelot_multicast_get(ocelot, mdb->addr, vid);
if (!mc)
return -ENOENT;
ocelot_encode_ports_to_mdb(addr, mc);
ocelot_mact_forget(ocelot, addr, vid);
ocelot_pgid_free(ocelot, mc->pgid);
mc->ports &= ~BIT(port);
if (!mc->ports) {
list_del(&mc->list);
devm_kfree(ocelot->dev, mc);
return 0;
}
/* We have a PGID with fewer ports now */
pgid = ocelot_mdb_get_pgid(ocelot, mc);
if (IS_ERR(pgid))
return PTR_ERR(pgid);
mc->pgid = pgid;
ocelot_encode_ports_to_mdb(addr, mc);
if (mc->entry_type != ENTRYTYPE_MACv4 &&
mc->entry_type != ENTRYTYPE_MACv6)
ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
pgid->index);
return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
mc->entry_type);
}
EXPORT_SYMBOL(ocelot_port_mdb_del);
int ocelot_port_bridge_join(struct ocelot *ocelot, int port,
struct net_device *bridge, int bridge_num,
struct netlink_ext_ack *extack)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int err;
err = ocelot_single_vlan_aware_bridge(ocelot, extack);
if (err)
return err;
mutex_lock(&ocelot->fwd_domain_lock);
ocelot_port->bridge = bridge;
ocelot_port->bridge_num = bridge_num;
ocelot_apply_bridge_fwd_mask(ocelot, true);
mutex_unlock(&ocelot->fwd_domain_lock);
if (br_vlan_enabled(bridge))
return 0;
return ocelot_add_vlan_unaware_pvid(ocelot, port, bridge);
}
EXPORT_SYMBOL(ocelot_port_bridge_join);
void ocelot_port_bridge_leave(struct ocelot *ocelot, int port,
struct net_device *bridge)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
mutex_lock(&ocelot->fwd_domain_lock);
if (!br_vlan_enabled(bridge))
ocelot_del_vlan_unaware_pvid(ocelot, port, bridge);
ocelot_port->bridge = NULL;
ocelot_port->bridge_num = -1;
ocelot_port_set_pvid(ocelot, port, NULL);
ocelot_port_manage_port_tag(ocelot, port);
ocelot_apply_bridge_fwd_mask(ocelot, false);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_bridge_leave);
static void ocelot_set_aggr_pgids(struct ocelot *ocelot)
{
unsigned long visited = GENMASK(ocelot->num_phys_ports - 1, 0);
int i, port, lag;
/* Reset destination and aggregation PGIDS */
for_each_unicast_dest_pgid(ocelot, port)
ocelot_write_rix(ocelot, BIT(port), ANA_PGID_PGID, port);
for_each_aggr_pgid(ocelot, i)
ocelot_write_rix(ocelot, GENMASK(ocelot->num_phys_ports - 1, 0),
ANA_PGID_PGID, i);
/* The visited ports bitmask holds the list of ports offloading any
* bonding interface. Initially we mark all these ports as unvisited,
* then every time we visit a port in this bitmask, we know that it is
* the lowest numbered port, i.e. the one whose logical ID == physical
* port ID == LAG ID. So we mark as visited all further ports in the
* bitmask that are offloading the same bonding interface. This way,
* we set up the aggregation PGIDs only once per bonding interface.
*/
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port || !ocelot_port->bond)
continue;
visited &= ~BIT(port);
}
/* Now, set PGIDs for each active LAG */
for (lag = 0; lag < ocelot->num_phys_ports; lag++) {
struct ocelot_port *ocelot_port = ocelot->ports[lag];
int num_active_ports = 0;
struct net_device *bond;
unsigned long bond_mask;
u8 aggr_idx[16];
if (!ocelot_port || !ocelot_port->bond || (visited & BIT(lag)))
continue;
bond = ocelot_port->bond;
bond_mask = ocelot_get_bond_mask(ocelot, bond);
for_each_set_bit(port, &bond_mask, ocelot->num_phys_ports) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
// Destination mask
ocelot_write_rix(ocelot, bond_mask,
ANA_PGID_PGID, port);
if (ocelot_port->lag_tx_active)
aggr_idx[num_active_ports++] = port;
}
for_each_aggr_pgid(ocelot, i) {
u32 ac;
ac = ocelot_read_rix(ocelot, ANA_PGID_PGID, i);
ac &= ~bond_mask;
/* Don't do division by zero if there was no active
* port. Just make all aggregation codes zero.
*/
if (num_active_ports)
ac |= BIT(aggr_idx[i % num_active_ports]);
ocelot_write_rix(ocelot, ac, ANA_PGID_PGID, i);
}
/* Mark all ports in the same LAG as visited to avoid applying
* the same config again.
*/
for (port = lag; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port)
continue;
if (ocelot_port->bond == bond)
visited |= BIT(port);
}
}
}
/* When offloading a bonding interface, the switch ports configured under the
* same bond must have the same logical port ID, equal to the physical port ID
* of the lowest numbered physical port in that bond. Otherwise, in standalone/
* bridged mode, each port has a logical port ID equal to its physical port ID.
*/
static void ocelot_setup_logical_port_ids(struct ocelot *ocelot)
{
int port;
for (port = 0; port < ocelot->num_phys_ports; port++) {
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct net_device *bond;
if (!ocelot_port)
continue;
bond = ocelot_port->bond;
if (bond) {
int lag = ocelot_bond_get_id(ocelot, bond);
ocelot_rmw_gix(ocelot,
ANA_PORT_PORT_CFG_PORTID_VAL(lag),
ANA_PORT_PORT_CFG_PORTID_VAL_M,
ANA_PORT_PORT_CFG, port);
} else {
ocelot_rmw_gix(ocelot,
ANA_PORT_PORT_CFG_PORTID_VAL(port),
ANA_PORT_PORT_CFG_PORTID_VAL_M,
ANA_PORT_PORT_CFG, port);
}
}
}
static int ocelot_migrate_mc(struct ocelot *ocelot, struct ocelot_multicast *mc,
unsigned long from_mask, unsigned long to_mask)
{
unsigned char addr[ETH_ALEN];
struct ocelot_pgid *pgid;
u16 vid = mc->vid;
dev_dbg(ocelot->dev,
"Migrating multicast %pM vid %d from port mask 0x%lx to 0x%lx\n",
mc->addr, mc->vid, from_mask, to_mask);
/* First clean up the current port mask from hardware, because
* we'll be modifying it.
*/
ocelot_pgid_free(ocelot, mc->pgid);
ocelot_encode_ports_to_mdb(addr, mc);
ocelot_mact_forget(ocelot, addr, vid);
mc->ports &= ~from_mask;
mc->ports |= to_mask;
pgid = ocelot_mdb_get_pgid(ocelot, mc);
if (IS_ERR(pgid)) {
dev_err(ocelot->dev,
"Cannot allocate PGID for mdb %pM vid %d\n",
mc->addr, mc->vid);
devm_kfree(ocelot->dev, mc);
return PTR_ERR(pgid);
}
mc->pgid = pgid;
ocelot_encode_ports_to_mdb(addr, mc);
if (mc->entry_type != ENTRYTYPE_MACv4 &&
mc->entry_type != ENTRYTYPE_MACv6)
ocelot_write_rix(ocelot, pgid->ports, ANA_PGID_PGID,
pgid->index);
return ocelot_mact_learn(ocelot, pgid->index, addr, vid,
mc->entry_type);
}
int ocelot_migrate_mdbs(struct ocelot *ocelot, unsigned long from_mask,
unsigned long to_mask)
{
struct ocelot_multicast *mc;
int err;
list_for_each_entry(mc, &ocelot->multicast, list) {
if (!(mc->ports & from_mask))
continue;
err = ocelot_migrate_mc(ocelot, mc, from_mask, to_mask);
if (err)
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_migrate_mdbs);
/* Documentation for PORTID_VAL says:
* Logical port number for front port. If port is not a member of a LLAG,
* then PORTID must be set to the physical port number.
* If port is a member of a LLAG, then PORTID must be set to the common
* PORTID_VAL used for all member ports of the LLAG.
* The value must not exceed the number of physical ports on the device.
*
* This means we have little choice but to migrate FDB entries pointing towards
* a logical port when that changes.
*/
static void ocelot_migrate_lag_fdbs(struct ocelot *ocelot,
struct net_device *bond,
int lag)
{
struct ocelot_lag_fdb *fdb;
int err;
lockdep_assert_held(&ocelot->fwd_domain_lock);
list_for_each_entry(fdb, &ocelot->lag_fdbs, list) {
if (fdb->bond != bond)
continue;
err = ocelot_mact_forget(ocelot, fdb->addr, fdb->vid);
if (err) {
dev_err(ocelot->dev,
"failed to delete LAG %s FDB %pM vid %d: %pe\n",
bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
}
err = ocelot_mact_learn(ocelot, lag, fdb->addr, fdb->vid,
ENTRYTYPE_LOCKED);
if (err) {
dev_err(ocelot->dev,
"failed to migrate LAG %s FDB %pM vid %d: %pe\n",
bond->name, fdb->addr, fdb->vid, ERR_PTR(err));
}
}
}
int ocelot_port_lag_join(struct ocelot *ocelot, int port,
struct net_device *bond,
struct netdev_lag_upper_info *info,
struct netlink_ext_ack *extack)
{
if (info->tx_type != NETDEV_LAG_TX_TYPE_HASH) {
NL_SET_ERR_MSG_MOD(extack,
"Can only offload LAG using hash TX type");
return -EOPNOTSUPP;
}
mutex_lock(&ocelot->fwd_domain_lock);
ocelot->ports[port]->bond = bond;
ocelot_setup_logical_port_ids(ocelot);
ocelot_apply_bridge_fwd_mask(ocelot, true);
ocelot_set_aggr_pgids(ocelot);
mutex_unlock(&ocelot->fwd_domain_lock);
return 0;
}
EXPORT_SYMBOL(ocelot_port_lag_join);
void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
struct net_device *bond)
{
int old_lag_id, new_lag_id;
mutex_lock(&ocelot->fwd_domain_lock);
old_lag_id = ocelot_bond_get_id(ocelot, bond);
ocelot->ports[port]->bond = NULL;
ocelot_setup_logical_port_ids(ocelot);
ocelot_apply_bridge_fwd_mask(ocelot, false);
ocelot_set_aggr_pgids(ocelot);
new_lag_id = ocelot_bond_get_id(ocelot, bond);
if (new_lag_id >= 0 && old_lag_id != new_lag_id)
ocelot_migrate_lag_fdbs(ocelot, bond, new_lag_id);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_lag_leave);
void ocelot_port_lag_change(struct ocelot *ocelot, int port, bool lag_tx_active)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
mutex_lock(&ocelot->fwd_domain_lock);
ocelot_port->lag_tx_active = lag_tx_active;
/* Rebalance the LAGs */
ocelot_set_aggr_pgids(ocelot);
mutex_unlock(&ocelot->fwd_domain_lock);
}
EXPORT_SYMBOL(ocelot_port_lag_change);
int ocelot_lag_fdb_add(struct ocelot *ocelot, struct net_device *bond,
const unsigned char *addr, u16 vid,
const struct net_device *bridge)
{
struct ocelot_lag_fdb *fdb;
int lag, err;
fdb = kzalloc_obj(*fdb);
if (!fdb)
return -ENOMEM;
mutex_lock(&ocelot->fwd_domain_lock);
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
ether_addr_copy(fdb->addr, addr);
fdb->vid = vid;
fdb->bond = bond;
lag = ocelot_bond_get_id(ocelot, bond);
err = ocelot_mact_learn(ocelot, lag, addr, vid, ENTRYTYPE_LOCKED);
if (err) {
mutex_unlock(&ocelot->fwd_domain_lock);
kfree(fdb);
return err;
}
list_add_tail(&fdb->list, &ocelot->lag_fdbs);
mutex_unlock(&ocelot->fwd_domain_lock);
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_lag_fdb_add);
int ocelot_lag_fdb_del(struct ocelot *ocelot, struct net_device *bond,
const unsigned char *addr, u16 vid,
const struct net_device *bridge)
{
struct ocelot_lag_fdb *fdb, *tmp;
mutex_lock(&ocelot->fwd_domain_lock);
if (!vid)
vid = ocelot_vlan_unaware_pvid(ocelot, bridge);
list_for_each_entry_safe(fdb, tmp, &ocelot->lag_fdbs, list) {
if (!ether_addr_equal(fdb->addr, addr) || fdb->vid != vid ||
fdb->bond != bond)
continue;
ocelot_mact_forget(ocelot, addr, vid);
list_del(&fdb->list);
mutex_unlock(&ocelot->fwd_domain_lock);
kfree(fdb);
return 0;
}
mutex_unlock(&ocelot->fwd_domain_lock);
return -ENOENT;
}
EXPORT_SYMBOL_GPL(ocelot_lag_fdb_del);
/* Configure the maximum SDU (L2 payload) on RX to the value specified in @sdu.
* The length of VLAN tags is accounted for automatically via DEV_MAC_TAGS_CFG.
* In the special case that it's the NPI port that we're configuring, the
* length of the tag and optional prefix needs to be accounted for privately,
* in order to be able to sustain communication at the requested @sdu.
*/
void ocelot_port_set_maxlen(struct ocelot *ocelot, int port, size_t sdu)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int maxlen = sdu + ETH_HLEN + ETH_FCS_LEN;
int pause_start, pause_stop;
int atop, atop_tot;
if (port == ocelot->npi) {
maxlen += OCELOT_TAG_LEN;
if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_SHORT)
maxlen += OCELOT_SHORT_PREFIX_LEN;
else if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_LONG)
maxlen += OCELOT_LONG_PREFIX_LEN;
}
ocelot_port_writel(ocelot_port, maxlen, DEV_MAC_MAXLEN_CFG);
/* Set Pause watermark hysteresis */
pause_start = 6 * maxlen / OCELOT_BUFFER_CELL_SZ;
pause_stop = 4 * maxlen / OCELOT_BUFFER_CELL_SZ;
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_START,
pause_start);
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_STOP,
pause_stop);
/* Tail dropping watermarks */
atop_tot = (ocelot->packet_buffer_size - 9 * maxlen) /
OCELOT_BUFFER_CELL_SZ;
atop = (9 * maxlen) / OCELOT_BUFFER_CELL_SZ;
ocelot_write_rix(ocelot, ocelot->ops->wm_enc(atop), SYS_ATOP, port);
ocelot_write(ocelot, ocelot->ops->wm_enc(atop_tot), SYS_ATOP_TOT_CFG);
}
EXPORT_SYMBOL(ocelot_port_set_maxlen);
int ocelot_get_max_mtu(struct ocelot *ocelot, int port)
{
int max_mtu = 65535 - ETH_HLEN - ETH_FCS_LEN;
if (port == ocelot->npi) {
max_mtu -= OCELOT_TAG_LEN;
if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_SHORT)
max_mtu -= OCELOT_SHORT_PREFIX_LEN;
else if (ocelot->npi_inj_prefix == OCELOT_TAG_PREFIX_LONG)
max_mtu -= OCELOT_LONG_PREFIX_LEN;
}
return max_mtu;
}
EXPORT_SYMBOL(ocelot_get_max_mtu);
static void ocelot_port_set_learning(struct ocelot *ocelot, int port,
bool enabled)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
u32 val = 0;
if (enabled)
val = ANA_PORT_PORT_CFG_LEARN_ENA;
ocelot_rmw_gix(ocelot, val, ANA_PORT_PORT_CFG_LEARN_ENA,
ANA_PORT_PORT_CFG, port);
ocelot_port->learn_ena = enabled;
}
static void ocelot_port_set_ucast_flood(struct ocelot *ocelot, int port,
bool enabled)
{
u32 val = 0;
if (enabled)
val = BIT(port);
ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_UC);
}
static void ocelot_port_set_mcast_flood(struct ocelot *ocelot, int port,
bool enabled)
{
u32 val = 0;
if (enabled)
val = BIT(port);
ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MC);
ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MCIPV4);
ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_MCIPV6);
}
static void ocelot_port_set_bcast_flood(struct ocelot *ocelot, int port,
bool enabled)
{
u32 val = 0;
if (enabled)
val = BIT(port);
ocelot_rmw_rix(ocelot, val, BIT(port), ANA_PGID_PGID, PGID_BC);
}
int ocelot_port_pre_bridge_flags(struct ocelot *ocelot, int port,
struct switchdev_brport_flags flags)
{
if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
BR_BCAST_FLOOD))
return -EINVAL;
return 0;
}
EXPORT_SYMBOL(ocelot_port_pre_bridge_flags);
void ocelot_port_bridge_flags(struct ocelot *ocelot, int port,
struct switchdev_brport_flags flags)
{
if (flags.mask & BR_LEARNING)
ocelot_port_set_learning(ocelot, port,
!!(flags.val & BR_LEARNING));
if (flags.mask & BR_FLOOD)
ocelot_port_set_ucast_flood(ocelot, port,
!!(flags.val & BR_FLOOD));
if (flags.mask & BR_MCAST_FLOOD)
ocelot_port_set_mcast_flood(ocelot, port,
!!(flags.val & BR_MCAST_FLOOD));
if (flags.mask & BR_BCAST_FLOOD)
ocelot_port_set_bcast_flood(ocelot, port,
!!(flags.val & BR_BCAST_FLOOD));
}
EXPORT_SYMBOL(ocelot_port_bridge_flags);
int ocelot_port_get_default_prio(struct ocelot *ocelot, int port)
{
int val = ocelot_read_gix(ocelot, ANA_PORT_QOS_CFG, port);
return ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL_X(val);
}
EXPORT_SYMBOL_GPL(ocelot_port_get_default_prio);
int ocelot_port_set_default_prio(struct ocelot *ocelot, int port, u8 prio)
{
if (prio >= OCELOT_NUM_TC)
return -ERANGE;
ocelot_rmw_gix(ocelot,
ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL(prio),
ANA_PORT_QOS_CFG_QOS_DEFAULT_VAL_M,
ANA_PORT_QOS_CFG,
port);
return ocelot_update_vlan_reclassify_rule(ocelot, port);
}
EXPORT_SYMBOL_GPL(ocelot_port_set_default_prio);
int ocelot_port_get_dscp_prio(struct ocelot *ocelot, int port, u8 dscp)
{
int qos_cfg = ocelot_read_gix(ocelot, ANA_PORT_QOS_CFG, port);
int dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);
/* Return error if DSCP prioritization isn't enabled */
if (!(qos_cfg & ANA_PORT_QOS_CFG_QOS_DSCP_ENA))
return -EOPNOTSUPP;
if (qos_cfg & ANA_PORT_QOS_CFG_DSCP_TRANSLATE_ENA) {
dscp = ANA_DSCP_CFG_DSCP_TRANSLATE_VAL_X(dscp_cfg);
/* Re-read ANA_DSCP_CFG for the translated DSCP */
dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);
}
/* If the DSCP value is not trusted, the QoS classification falls back
* to VLAN PCP or port-based default.
*/
if (!(dscp_cfg & ANA_DSCP_CFG_DSCP_TRUST_ENA))
return -EOPNOTSUPP;
return ANA_DSCP_CFG_QOS_DSCP_VAL_X(dscp_cfg);
}
EXPORT_SYMBOL_GPL(ocelot_port_get_dscp_prio);
int ocelot_port_add_dscp_prio(struct ocelot *ocelot, int port, u8 dscp, u8 prio)
{
int mask, val;
if (prio >= OCELOT_NUM_TC)
return -ERANGE;
/* There is at least one app table priority (this one), so we need to
* make sure DSCP prioritization is enabled on the port.
* Also make sure DSCP translation is disabled
* (dcbnl doesn't support it).
*/
mask = ANA_PORT_QOS_CFG_QOS_DSCP_ENA |
ANA_PORT_QOS_CFG_DSCP_TRANSLATE_ENA;
ocelot_rmw_gix(ocelot, ANA_PORT_QOS_CFG_QOS_DSCP_ENA, mask,
ANA_PORT_QOS_CFG, port);
/* Trust this DSCP value and map it to the given QoS class */
val = ANA_DSCP_CFG_DSCP_TRUST_ENA | ANA_DSCP_CFG_QOS_DSCP_VAL(prio);
ocelot_write_rix(ocelot, val, ANA_DSCP_CFG, dscp);
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_add_dscp_prio);
int ocelot_port_del_dscp_prio(struct ocelot *ocelot, int port, u8 dscp, u8 prio)
{
int dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, dscp);
int mask, i;
/* During a "dcb app replace" command, the new app table entry will be
* added first, then the old one will be deleted. But the hardware only
* supports one QoS class per DSCP value (duh), so if we blindly delete
* the app table entry for this DSCP value, we end up deleting the
* entry with the new priority. Avoid that by checking whether user
* space wants to delete the priority which is currently configured, or
* something else which is no longer current.
*/
if (ANA_DSCP_CFG_QOS_DSCP_VAL_X(dscp_cfg) != prio)
return 0;
/* Untrust this DSCP value */
ocelot_write_rix(ocelot, 0, ANA_DSCP_CFG, dscp);
for (i = 0; i < 64; i++) {
int dscp_cfg = ocelot_read_rix(ocelot, ANA_DSCP_CFG, i);
/* There are still app table entries on the port, so we need to
* keep DSCP enabled, nothing to do.
*/
if (dscp_cfg & ANA_DSCP_CFG_DSCP_TRUST_ENA)
return 0;
}
/* Disable DSCP QoS classification if there isn't any trusted
* DSCP value left.
*/
mask = ANA_PORT_QOS_CFG_QOS_DSCP_ENA |
ANA_PORT_QOS_CFG_DSCP_TRANSLATE_ENA;
ocelot_rmw_gix(ocelot, 0, mask, ANA_PORT_QOS_CFG, port);
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_del_dscp_prio);
struct ocelot_mirror *ocelot_mirror_get(struct ocelot *ocelot, int to,
struct netlink_ext_ack *extack)
{
struct ocelot_mirror *m = ocelot->mirror;
if (m) {
if (m->to != to) {
NL_SET_ERR_MSG_MOD(extack,
"Mirroring already configured towards different egress port");
return ERR_PTR(-EBUSY);
}
refcount_inc(&m->refcount);
return m;
}
m = kzalloc_obj(*m);
if (!m)
return ERR_PTR(-ENOMEM);
m->to = to;
refcount_set(&m->refcount, 1);
ocelot->mirror = m;
/* Program the mirror port to hardware */
ocelot_write(ocelot, BIT(to), ANA_MIRRORPORTS);
return m;
}
void ocelot_mirror_put(struct ocelot *ocelot)
{
struct ocelot_mirror *m = ocelot->mirror;
if (!refcount_dec_and_test(&m->refcount))
return;
ocelot_write(ocelot, 0, ANA_MIRRORPORTS);
ocelot->mirror = NULL;
kfree(m);
}
int ocelot_port_mirror_add(struct ocelot *ocelot, int from, int to,
bool ingress, struct netlink_ext_ack *extack)
{
struct ocelot_mirror *m = ocelot_mirror_get(ocelot, to, extack);
if (IS_ERR(m))
return PTR_ERR(m);
if (ingress) {
ocelot_rmw_gix(ocelot, ANA_PORT_PORT_CFG_SRC_MIRROR_ENA,
ANA_PORT_PORT_CFG_SRC_MIRROR_ENA,
ANA_PORT_PORT_CFG, from);
} else {
ocelot_rmw(ocelot, BIT(from), BIT(from),
ANA_EMIRRORPORTS);
}
return 0;
}
EXPORT_SYMBOL_GPL(ocelot_port_mirror_add);
void ocelot_port_mirror_del(struct ocelot *ocelot, int from, bool ingress)
{
if (ingress) {
ocelot_rmw_gix(ocelot, 0, ANA_PORT_PORT_CFG_SRC_MIRROR_ENA,
ANA_PORT_PORT_CFG, from);
} else {
ocelot_rmw(ocelot, 0, BIT(from), ANA_EMIRRORPORTS);
}
ocelot_mirror_put(ocelot);
}
EXPORT_SYMBOL_GPL(ocelot_port_mirror_del);
static void ocelot_port_reset_mqprio(struct ocelot *ocelot, int port)
{
struct net_device *dev = ocelot->ops->port_to_netdev(ocelot, port);
netdev_reset_tc(dev);
ocelot_port_change_fp(ocelot, port, 0);
}
int ocelot_port_mqprio(struct ocelot *ocelot, int port,
struct tc_mqprio_qopt_offload *mqprio)
{
struct net_device *dev = ocelot->ops->port_to_netdev(ocelot, port);
struct netlink_ext_ack *extack = mqprio->extack;
struct tc_mqprio_qopt *qopt = &mqprio->qopt;
int num_tc = qopt->num_tc;
int tc, err;
if (!num_tc) {
ocelot_port_reset_mqprio(ocelot, port);
return 0;
}
err = netdev_set_num_tc(dev, num_tc);
if (err)
return err;
for (tc = 0; tc < num_tc; tc++) {
if (qopt->count[tc] != 1) {
NL_SET_ERR_MSG_MOD(extack,
"Only one TXQ per TC supported");
return -EINVAL;
}
err = netdev_set_tc_queue(dev, tc, 1, qopt->offset[tc]);
if (err)
goto err_reset_tc;
}
err = netif_set_real_num_tx_queues(dev, num_tc);
if (err)
goto err_reset_tc;
ocelot_port_change_fp(ocelot, port, mqprio->preemptible_tcs);
return 0;
err_reset_tc:
ocelot_port_reset_mqprio(ocelot, port);
return err;
}
EXPORT_SYMBOL_GPL(ocelot_port_mqprio);
void ocelot_init_port(struct ocelot *ocelot, int port)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
skb_queue_head_init(&ocelot_port->tx_skbs);
/* Basic L2 initialization */
/* Set MAC IFG Gaps
* FDX: TX_IFG = 5, RX_IFG1 = RX_IFG2 = 0
* !FDX: TX_IFG = 5, RX_IFG1 = RX_IFG2 = 5
*/
ocelot_port_writel(ocelot_port, DEV_MAC_IFG_CFG_TX_IFG(5),
DEV_MAC_IFG_CFG);
/* Load seed (0) and set MAC HDX late collision */
ocelot_port_writel(ocelot_port, DEV_MAC_HDX_CFG_LATE_COL_POS(67) |
DEV_MAC_HDX_CFG_SEED_LOAD,
DEV_MAC_HDX_CFG);
mdelay(1);
ocelot_port_writel(ocelot_port, DEV_MAC_HDX_CFG_LATE_COL_POS(67),
DEV_MAC_HDX_CFG);
/* Set Max Length and maximum tags allowed */
ocelot_port_set_maxlen(ocelot, port, ETH_DATA_LEN);
ocelot_port_writel(ocelot_port, DEV_MAC_TAGS_CFG_TAG_ID(ETH_P_8021AD) |
DEV_MAC_TAGS_CFG_VLAN_AWR_ENA |
DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA |
DEV_MAC_TAGS_CFG_VLAN_LEN_AWR_ENA,
DEV_MAC_TAGS_CFG);
/* Set SMAC of Pause frame (00:00:00:00:00:00) */
ocelot_port_writel(ocelot_port, 0, DEV_MAC_FC_MAC_HIGH_CFG);
ocelot_port_writel(ocelot_port, 0, DEV_MAC_FC_MAC_LOW_CFG);
/* Enable transmission of pause frames */
ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, 1);
/* Drop frames with multicast source address */
ocelot_rmw_gix(ocelot, ANA_PORT_DROP_CFG_DROP_MC_SMAC_ENA,
ANA_PORT_DROP_CFG_DROP_MC_SMAC_ENA,
ANA_PORT_DROP_CFG, port);
/* Set default VLAN and tag type to 8021Q. */
ocelot_rmw_gix(ocelot, REW_PORT_VLAN_CFG_PORT_TPID(ETH_P_8021Q),
REW_PORT_VLAN_CFG_PORT_TPID_M,
REW_PORT_VLAN_CFG, port);
/* Disable source address learning for standalone mode */
ocelot_port_set_learning(ocelot, port, false);
/* Set the port's initial logical port ID value, enable receiving
* frames on it, and configure the MAC address learning type to
* automatic.
*/
ocelot_write_gix(ocelot, ANA_PORT_PORT_CFG_LEARNAUTO |
ANA_PORT_PORT_CFG_RECV_ENA |
ANA_PORT_PORT_CFG_PORTID_VAL(port),
ANA_PORT_PORT_CFG, port);
/* Enable vcap lookups */
ocelot_vcap_enable(ocelot, port);
}
EXPORT_SYMBOL(ocelot_init_port);
/* Configure and enable the CPU port module, which is a set of queues
* accessible through register MMIO, frame DMA or Ethernet (in case
* NPI mode is used).
*/
static void ocelot_cpu_port_init(struct ocelot *ocelot)
{
int cpu = ocelot->num_phys_ports;
/* The unicast destination PGID for the CPU port module is unused */
ocelot_write_rix(ocelot, 0, ANA_PGID_PGID, cpu);
/* Instead set up a multicast destination PGID for traffic copied to
* the CPU. Whitelisted MAC addresses like the port netdevice MAC
* addresses will be copied to the CPU via this PGID.
*/
ocelot_write_rix(ocelot, BIT(cpu), ANA_PGID_PGID, PGID_CPU);
ocelot_write_gix(ocelot, ANA_PORT_PORT_CFG_RECV_ENA |
ANA_PORT_PORT_CFG_PORTID_VAL(cpu),
ANA_PORT_PORT_CFG, cpu);
/* Enable CPU port module */
ocelot_fields_write(ocelot, cpu, QSYS_SWITCH_PORT_MODE_PORT_ENA, 1);
/* CPU port Injection/Extraction configuration */
ocelot_fields_write(ocelot, cpu, SYS_PORT_MODE_INCL_XTR_HDR,
OCELOT_TAG_PREFIX_NONE);
ocelot_fields_write(ocelot, cpu, SYS_PORT_MODE_INCL_INJ_HDR,
OCELOT_TAG_PREFIX_NONE);
/* Configure the CPU port to be VLAN aware */
ocelot_write_gix(ocelot,
ANA_PORT_VLAN_CFG_VLAN_VID(OCELOT_STANDALONE_PVID) |
ANA_PORT_VLAN_CFG_VLAN_AWARE_ENA |
ANA_PORT_VLAN_CFG_VLAN_POP_CNT(1),
ANA_PORT_VLAN_CFG, cpu);
}
static void ocelot_detect_features(struct ocelot *ocelot)
{
int mmgt, eq_ctrl;
/* For Ocelot, Felix, Seville, Serval etc, SYS:MMGT:MMGT:FREECNT holds
* the number of 240-byte free memory words (aka 4-cell chunks) and not
* 192 bytes as the documentation incorrectly says.
*/
mmgt = ocelot_read(ocelot, SYS_MMGT);
ocelot->packet_buffer_size = 240 * SYS_MMGT_FREECNT(mmgt);
eq_ctrl = ocelot_read(ocelot, QSYS_EQ_CTRL);
ocelot->num_frame_refs = QSYS_MMGT_EQ_CTRL_FP_FREE_CNT(eq_ctrl);
}
static int ocelot_mem_init_status(struct ocelot *ocelot)
{
unsigned int val;
int err;
err = regmap_field_read(ocelot->regfields[SYS_RESET_CFG_MEM_INIT],
&val);
return err ?: val;
}
int ocelot_reset(struct ocelot *ocelot)
{
int err;
u32 val;
err = regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_INIT], 1);
if (err)
return err;
err = regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
if (err)
return err;
/* MEM_INIT is a self-clearing bit. Wait for it to be cleared (should be
* 100us) before enabling the switch core.
*/
err = readx_poll_timeout(ocelot_mem_init_status, ocelot, val, !val,
MEM_INIT_SLEEP_US, MEM_INIT_TIMEOUT_US);
if (err)
return err;
err = regmap_field_write(ocelot->regfields[SYS_RESET_CFG_MEM_ENA], 1);
if (err)
return err;
return regmap_field_write(ocelot->regfields[SYS_RESET_CFG_CORE_ENA], 1);
}
EXPORT_SYMBOL(ocelot_reset);
int ocelot_init(struct ocelot *ocelot)
{
int i, ret;
u32 port;
if (ocelot->ops->reset) {
ret = ocelot->ops->reset(ocelot);
if (ret) {
dev_err(ocelot->dev, "Switch reset failed\n");
return ret;
}
}
mutex_init(&ocelot->mact_lock);
mutex_init(&ocelot->fwd_domain_lock);
spin_lock_init(&ocelot->ptp_clock_lock);
spin_lock_init(&ocelot->ts_id_lock);
spin_lock_init(&ocelot->inj_lock);
spin_lock_init(&ocelot->xtr_lock);
ocelot->owq = alloc_ordered_workqueue("ocelot-owq", 0);
if (!ocelot->owq)
return -ENOMEM;
ret = ocelot_stats_init(ocelot);
if (ret)
goto err_stats_init;
INIT_LIST_HEAD(&ocelot->multicast);
INIT_LIST_HEAD(&ocelot->pgids);
INIT_LIST_HEAD(&ocelot->vlans);
INIT_LIST_HEAD(&ocelot->lag_fdbs);
ocelot_detect_features(ocelot);
ocelot_mact_init(ocelot);
ocelot_vlan_init(ocelot);
ocelot_vcap_init(ocelot);
ocelot_cpu_port_init(ocelot);
if (ocelot->ops->psfp_init)
ocelot->ops->psfp_init(ocelot);
if (ocelot->mm_supported) {
ret = ocelot_mm_init(ocelot);
if (ret)
goto err_mm_init;
}
for (port = 0; port < ocelot->num_phys_ports; port++) {
/* Clear all counters (5 groups) */
ocelot_write(ocelot, SYS_STAT_CFG_STAT_VIEW(port) |
SYS_STAT_CFG_STAT_CLEAR_SHOT(0x7f),
SYS_STAT_CFG);
}
/* Only use S-Tag */
ocelot_write(ocelot, ETH_P_8021AD, SYS_VLAN_ETYPE_CFG);
/* Aggregation mode */
ocelot_write(ocelot, ANA_AGGR_CFG_AC_SMAC_ENA |
ANA_AGGR_CFG_AC_DMAC_ENA |
ANA_AGGR_CFG_AC_IP4_SIPDIP_ENA |
ANA_AGGR_CFG_AC_IP4_TCPUDP_ENA |
ANA_AGGR_CFG_AC_IP6_FLOW_LBL_ENA |
ANA_AGGR_CFG_AC_IP6_TCPUDP_ENA,
ANA_AGGR_CFG);
/* Set MAC age time to default value. The entry is aged after
* 2*AGE_PERIOD
*/
ocelot_write(ocelot,
ANA_AUTOAGE_AGE_PERIOD(BR_DEFAULT_AGEING_TIME / 2 / HZ),
ANA_AUTOAGE);
/* Disable learning for frames discarded by VLAN ingress filtering */
regmap_field_write(ocelot->regfields[ANA_ADVLEARN_VLAN_CHK], 1);
/* Setup frame ageing - fixed value "2 sec" - in 6.5 us units */
ocelot_write(ocelot, SYS_FRM_AGING_AGE_TX_ENA |
SYS_FRM_AGING_MAX_AGE(307692), SYS_FRM_AGING);
/* Setup flooding PGIDs */
for (i = 0; i < ocelot->num_flooding_pgids; i++)
ocelot_write_rix(ocelot, ANA_FLOODING_FLD_MULTICAST(PGID_MC) |
ANA_FLOODING_FLD_BROADCAST(PGID_BC) |
ANA_FLOODING_FLD_UNICAST(PGID_UC),
ANA_FLOODING, i);
ocelot_write(ocelot, ANA_FLOODING_IPMC_FLD_MC6_DATA(PGID_MCIPV6) |
ANA_FLOODING_IPMC_FLD_MC6_CTRL(PGID_MC) |
ANA_FLOODING_IPMC_FLD_MC4_DATA(PGID_MCIPV4) |
ANA_FLOODING_IPMC_FLD_MC4_CTRL(PGID_MC),
ANA_FLOODING_IPMC);
for (port = 0; port < ocelot->num_phys_ports; port++) {
/* Transmit the frame to the local port. */
ocelot_write_rix(ocelot, BIT(port), ANA_PGID_PGID, port);
/* Do not forward BPDU frames to the front ports. */
ocelot_write_gix(ocelot,
ANA_PORT_CPU_FWD_BPDU_CFG_BPDU_REDIR_ENA(0xffff),
ANA_PORT_CPU_FWD_BPDU_CFG,
port);
/* Ensure bridging is disabled */
ocelot_write_rix(ocelot, 0, ANA_PGID_PGID, PGID_SRC + port);
}
for_each_nonreserved_multicast_dest_pgid(ocelot, i) {
u32 val = ANA_PGID_PGID_PGID(GENMASK(ocelot->num_phys_ports - 1, 0));
ocelot_write_rix(ocelot, val, ANA_PGID_PGID, i);
}
ocelot_write_rix(ocelot, 0, ANA_PGID_PGID, PGID_BLACKHOLE);
/* Allow broadcast and unknown L2 multicast to the CPU. */
ocelot_rmw_rix(ocelot, ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports)),
ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports)),
ANA_PGID_PGID, PGID_MC);
ocelot_rmw_rix(ocelot, ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports)),
ANA_PGID_PGID_PGID(BIT(ocelot->num_phys_ports)),
ANA_PGID_PGID, PGID_BC);
ocelot_write_rix(ocelot, 0, ANA_PGID_PGID, PGID_MCIPV4);
ocelot_write_rix(ocelot, 0, ANA_PGID_PGID, PGID_MCIPV6);
/* Allow manual injection via DEVCPU_QS registers, and byte swap these
* registers endianness.
*/
ocelot_write_rix(ocelot, QS_INJ_GRP_CFG_BYTE_SWAP |
QS_INJ_GRP_CFG_MODE(1), QS_INJ_GRP_CFG, 0);
ocelot_write_rix(ocelot, QS_XTR_GRP_CFG_BYTE_SWAP |
QS_XTR_GRP_CFG_MODE(1), QS_XTR_GRP_CFG, 0);
ocelot_write(ocelot, ANA_CPUQ_CFG_CPUQ_MIRROR(2) |
ANA_CPUQ_CFG_CPUQ_LRN(2) |
ANA_CPUQ_CFG_CPUQ_MAC_COPY(2) |
ANA_CPUQ_CFG_CPUQ_SRC_COPY(2) |
ANA_CPUQ_CFG_CPUQ_LOCKED_PORTMOVE(2) |
ANA_CPUQ_CFG_CPUQ_ALLBRIDGE(6) |
ANA_CPUQ_CFG_CPUQ_IPMC_CTRL(6) |
ANA_CPUQ_CFG_CPUQ_IGMP(6) |
ANA_CPUQ_CFG_CPUQ_MLD(6), ANA_CPUQ_CFG);
for (i = 0; i < 16; i++)
ocelot_write_rix(ocelot, ANA_CPUQ_8021_CFG_CPUQ_GARP_VAL(6) |
ANA_CPUQ_8021_CFG_CPUQ_BPDU_VAL(6),
ANA_CPUQ_8021_CFG, i);
return 0;
err_mm_init:
ocelot_stats_deinit(ocelot);
err_stats_init:
destroy_workqueue(ocelot->owq);
return ret;
}
EXPORT_SYMBOL(ocelot_init);
void ocelot_deinit(struct ocelot *ocelot)
{
ocelot_stats_deinit(ocelot);
destroy_workqueue(ocelot->owq);
}
EXPORT_SYMBOL(ocelot_deinit);
void ocelot_deinit_port(struct ocelot *ocelot, int port)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
skb_queue_purge(&ocelot_port->tx_skbs);
}
EXPORT_SYMBOL(ocelot_deinit_port);
MODULE_DESCRIPTION("Microsemi Ocelot switch family library");
MODULE_LICENSE("Dual MIT/GPL");