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net: bcmgenet: add support for ethtool rxnfc flows

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This commit enables driver support for ethtool commands of this form:
ethtool -N|-U|--config-nfc|--config-ntuple devname
    flow-type ether|ip4
    [src xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]]
    [dst xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [proto N [m N]]
    [src-ip x.x.x.x [m x.x.x.x]] [dst-ip x.x.x.x [m x.x.x.x]] [tos N [m N]]
    [l4proto N [m N]] [src-port N [m N]] [dst-port N [m N]] [spi N [m N]]
    [l4data N [m N]] [vlan-etype N [m N]] [vlan N [m N]]
    [dst-mac xx:yy:zz:aa:bb:cc [m xx:yy:zz:aa:bb:cc]] [action 0] [loc N] |
    delete N

Since there is only one Rx Ring in this implementation action 0 behaves no
differently from not specifying a rule.

The rules can be seen with ethtool commands of this form:
ethtool -n|-u|--show-nfc|--show-ntuple devname [rule N]

Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Doug Berger 2020-04-29 13:02:05 -07:00 committed by David S. Miller
parent 854295d03c
commit 3e37095228
2 changed files with 488 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

483
drivers/net/ethernet/broadcom/genet/bcmgenet.c
View File

@ -479,6 +479,30 @@ static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
reg = bcmgenet_hfb_reg_readl(priv, offset);
reg |= (1 << (f_index % 32));
bcmgenet_hfb_reg_writel(priv, reg, offset);
reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
reg |= RBUF_HFB_EN;
bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
}
static void bcmgenet_hfb_disable_filter(struct bcmgenet_priv *priv, u32 f_index)
{
u32 offset, reg, reg1;
offset = HFB_FLT_ENABLE_V3PLUS;
reg = bcmgenet_hfb_reg_readl(priv, offset);
reg1 = bcmgenet_hfb_reg_readl(priv, offset + sizeof(u32));
if (f_index < 32) {
reg1 &= ~(1 << (f_index % 32));
bcmgenet_hfb_reg_writel(priv, reg1, offset + sizeof(u32));
} else {
reg &= ~(1 << (f_index % 32));
bcmgenet_hfb_reg_writel(priv, reg, offset);
}
if (!reg && !reg1) {
reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
reg &= ~RBUF_HFB_EN;
bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
}
}
static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
@ -513,13 +537,213 @@ static int bcmgenet_hfb_find_unused_filter(struct bcmgenet_priv *priv)
{
u32 f_index;
for (f_index = 0; f_index < priv->hw_params->hfb_filter_cnt; f_index++)
/* First MAX_NUM_OF_FS_RULES are reserved for Rx NFC filters */
for (f_index = MAX_NUM_OF_FS_RULES;
f_index < priv->hw_params->hfb_filter_cnt; f_index++)
if (!bcmgenet_hfb_is_filter_enabled(priv, f_index))
return f_index;
return -ENOMEM;
}
static int bcmgenet_hfb_validate_mask(void *mask, size_t size)
{
while (size) {
switch (*(unsigned char *)mask++) {
case 0x00:
case 0x0f:
case 0xf0:
case 0xff:
size--;
continue;
default:
return -EINVAL;
}
}
return 0;
}
#define VALIDATE_MASK(x) \
bcmgenet_hfb_validate_mask(&(x), sizeof(x))
static int bcmgenet_hfb_insert_data(u32 *f, int offset,
void *val, void *mask, size_t size)
{
int index;
u32 tmp;
index = offset / 2;
tmp = f[index];
while (size--) {
if (offset++ & 1) {
tmp &= ~0x300FF;
tmp |= (*(unsigned char *)val++);
switch ((*(unsigned char *)mask++)) {
case 0xFF:
tmp |= 0x30000;
break;
case 0xF0:
tmp |= 0x20000;
break;
case 0x0F:
tmp |= 0x10000;
break;
}
f[index++] = tmp;
if (size)
tmp = f[index];
} else {
tmp &= ~0xCFF00;
tmp |= (*(unsigned char *)val++) << 8;
switch ((*(unsigned char *)mask++)) {
case 0xFF:
tmp |= 0xC0000;
break;
case 0xF0:
tmp |= 0x80000;
break;
case 0x0F:
tmp |= 0x40000;
break;
}
if (!size)
f[index] = tmp;
}
}
return 0;
}
static void bcmgenet_hfb_set_filter(struct bcmgenet_priv *priv, u32 *f_data,
u32 f_length, u32 rx_queue, int f_index)
{
u32 base = f_index * priv->hw_params->hfb_filter_size;
int i;
for (i = 0; i < f_length; i++)
bcmgenet_hfb_writel(priv, f_data[i], (base + i) * sizeof(u32));
bcmgenet_hfb_set_filter_length(priv, f_index, 2 * f_length);
bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f_index, rx_queue);
}
static int bcmgenet_hfb_create_rxnfc_filter(struct bcmgenet_priv *priv,
struct bcmgenet_rxnfc_rule *rule)
{
struct ethtool_rx_flow_spec *fs = &rule->fs;
int err = 0, offset = 0, f_length = 0;
u16 val_16, mask_16;
u8 val_8, mask_8;
size_t size;
u32 *f_data;
f_data = kcalloc(priv->hw_params->hfb_filter_size, sizeof(u32),
GFP_KERNEL);
if (!f_data)
return -ENOMEM;
if (fs->flow_type & FLOW_MAC_EXT) {
bcmgenet_hfb_insert_data(f_data, 0,
&fs->h_ext.h_dest, &fs->m_ext.h_dest,
sizeof(fs->h_ext.h_dest));
}
if (fs->flow_type & FLOW_EXT) {
if (fs->m_ext.vlan_etype ||
fs->m_ext.vlan_tci) {
bcmgenet_hfb_insert_data(f_data, 12,
&fs->h_ext.vlan_etype,
&fs->m_ext.vlan_etype,
sizeof(fs->h_ext.vlan_etype));
bcmgenet_hfb_insert_data(f_data, 14,
&fs->h_ext.vlan_tci,
&fs->m_ext.vlan_tci,
sizeof(fs->h_ext.vlan_tci));
offset += VLAN_HLEN;
f_length += DIV_ROUND_UP(VLAN_HLEN, 2);
}
}
switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
case ETHER_FLOW:
f_length += DIV_ROUND_UP(ETH_HLEN, 2);
bcmgenet_hfb_insert_data(f_data, 0,
&fs->h_u.ether_spec.h_dest,
&fs->m_u.ether_spec.h_dest,
sizeof(fs->h_u.ether_spec.h_dest));
bcmgenet_hfb_insert_data(f_data, ETH_ALEN,
&fs->h_u.ether_spec.h_source,
&fs->m_u.ether_spec.h_source,
sizeof(fs->h_u.ether_spec.h_source));
bcmgenet_hfb_insert_data(f_data, (2 * ETH_ALEN) + offset,
&fs->h_u.ether_spec.h_proto,
&fs->m_u.ether_spec.h_proto,
sizeof(fs->h_u.ether_spec.h_proto));
break;
case IP_USER_FLOW:
f_length += DIV_ROUND_UP(ETH_HLEN + 20, 2);
/* Specify IP Ether Type */
val_16 = htons(ETH_P_IP);
mask_16 = 0xFFFF;
bcmgenet_hfb_insert_data(f_data, (2 * ETH_ALEN) + offset,
&val_16, &mask_16, sizeof(val_16));
bcmgenet_hfb_insert_data(f_data, 15 + offset,
&fs->h_u.usr_ip4_spec.tos,
&fs->m_u.usr_ip4_spec.tos,
sizeof(fs->h_u.usr_ip4_spec.tos));
bcmgenet_hfb_insert_data(f_data, 23 + offset,
&fs->h_u.usr_ip4_spec.proto,
&fs->m_u.usr_ip4_spec.proto,
sizeof(fs->h_u.usr_ip4_spec.proto));
bcmgenet_hfb_insert_data(f_data, 26 + offset,
&fs->h_u.usr_ip4_spec.ip4src,
&fs->m_u.usr_ip4_spec.ip4src,
sizeof(fs->h_u.usr_ip4_spec.ip4src));
bcmgenet_hfb_insert_data(f_data, 30 + offset,
&fs->h_u.usr_ip4_spec.ip4dst,
&fs->m_u.usr_ip4_spec.ip4dst,
sizeof(fs->h_u.usr_ip4_spec.ip4dst));
if (!fs->m_u.usr_ip4_spec.l4_4_bytes)
break;
/* Only supports 20 byte IPv4 header */
val_8 = 0x45;
mask_8 = 0xFF;
bcmgenet_hfb_insert_data(f_data, ETH_HLEN + offset,
&val_8, &mask_8,
sizeof(val_8));
size = sizeof(fs->h_u.usr_ip4_spec.l4_4_bytes);
bcmgenet_hfb_insert_data(f_data,
ETH_HLEN + 20 + offset,
&fs->h_u.usr_ip4_spec.l4_4_bytes,
&fs->m_u.usr_ip4_spec.l4_4_bytes,
size);
f_length += DIV_ROUND_UP(size, 2);
break;
}
if (!fs->ring_cookie) {
/* Ring 0 flows can be handled by the default Descriptor Ring
* We'll map them to ring 0, but don't enable the filter
*/
bcmgenet_hfb_set_filter(priv, f_data, f_length, 0,
fs->location);
rule->state = BCMGENET_RXNFC_STATE_DISABLED;
} else {
/* Other Rx rings are direct mapped here */
bcmgenet_hfb_set_filter(priv, f_data, f_length,
fs->ring_cookie, fs->location);
bcmgenet_hfb_enable_filter(priv, fs->location);
rule->state = BCMGENET_RXNFC_STATE_ENABLED;
}
kfree(f_data);
return err;
}
/* bcmgenet_hfb_add_filter
*
* Add new filter to Hardware Filter Block to match and direct Rx traffic to
@ -559,7 +783,6 @@ int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
u32 f_length, u32 rx_queue)
{
int f_index;
u32 i;
f_index = bcmgenet_hfb_find_unused_filter(priv);
if (f_index < 0)
@ -568,15 +791,8 @@ int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
if (f_length > priv->hw_params->hfb_filter_size)
return -EINVAL;
for (i = 0; i < f_length; i++)
bcmgenet_hfb_writel(priv, f_data[i],
(f_index * priv->hw_params->hfb_filter_size + i) *
sizeof(u32));
bcmgenet_hfb_set_filter_length(priv, f_index, 2 * f_length);
bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f_index, rx_queue);
bcmgenet_hfb_set_filter(priv, f_data, f_length, rx_queue, f_index);
bcmgenet_hfb_enable_filter(priv, f_index);
bcmgenet_hfb_reg_writel(priv, 0x1, HFB_CTRL);
return 0;
}
@ -607,9 +823,17 @@ static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
{
int i;
if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
return;
INIT_LIST_HEAD(&priv->rxnfc_list);
for (i = 0; i < MAX_NUM_OF_FS_RULES; i++) {
INIT_LIST_HEAD(&priv->rxnfc_rules[i].list);
priv->rxnfc_rules[i].state = BCMGENET_RXNFC_STATE_UNUSED;
}
bcmgenet_hfb_clear(priv);
}
@ -1197,6 +1421,228 @@ static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
return phy_ethtool_set_eee(dev->phydev, e);
}
static int bcmgenet_validate_flow(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct ethtool_usrip4_spec *l4_mask;
struct ethhdr *eth_mask;
if (cmd->fs.location >= MAX_NUM_OF_FS_RULES) {
netdev_err(dev, "rxnfc: Invalid location (%d)\n",
cmd->fs.location);
return -EINVAL;
}
switch (cmd->fs.flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
case IP_USER_FLOW:
l4_mask = &cmd->fs.m_u.usr_ip4_spec;
/* don't allow mask which isn't valid */
if (VALIDATE_MASK(l4_mask->ip4src) ||
VALIDATE_MASK(l4_mask->ip4dst) ||
VALIDATE_MASK(l4_mask->l4_4_bytes) ||
VALIDATE_MASK(l4_mask->proto) ||
VALIDATE_MASK(l4_mask->ip_ver) ||
VALIDATE_MASK(l4_mask->tos)) {
netdev_err(dev, "rxnfc: Unsupported mask\n");
return -EINVAL;
}
break;
case ETHER_FLOW:
eth_mask = &cmd->fs.m_u.ether_spec;
/* don't allow mask which isn't valid */
if (VALIDATE_MASK(eth_mask->h_source) ||
VALIDATE_MASK(eth_mask->h_source) ||
VALIDATE_MASK(eth_mask->h_proto)) {
netdev_err(dev, "rxnfc: Unsupported mask\n");
return -EINVAL;
}
break;
default:
netdev_err(dev, "rxnfc: Unsupported flow type (0x%x)\n",
cmd->fs.flow_type);
return -EINVAL;
}
if ((cmd->fs.flow_type & FLOW_EXT)) {
/* don't allow mask which isn't valid */
if (VALIDATE_MASK(cmd->fs.m_ext.vlan_etype) ||
VALIDATE_MASK(cmd->fs.m_ext.vlan_tci)) {
netdev_err(dev, "rxnfc: Unsupported mask\n");
return -EINVAL;
}
if (cmd->fs.m_ext.data[0] || cmd->fs.m_ext.data[1]) {
netdev_err(dev, "rxnfc: user-def not supported\n");
return -EINVAL;
}
}
if ((cmd->fs.flow_type & FLOW_MAC_EXT)) {
/* don't allow mask which isn't valid */
if (VALIDATE_MASK(cmd->fs.m_ext.h_dest)) {
netdev_err(dev, "rxnfc: Unsupported mask\n");
return -EINVAL;
}
}
return 0;
}
static int bcmgenet_insert_flow(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct bcmgenet_rxnfc_rule *loc_rule;
int err;
if (priv->hw_params->hfb_filter_size < 128) {
netdev_err(dev, "rxnfc: Not supported by this device\n");
return -EINVAL;
}
if (cmd->fs.ring_cookie > priv->hw_params->rx_queues) {
netdev_err(dev, "rxnfc: Unsupported action (%llu)\n",
cmd->fs.ring_cookie);
return -EINVAL;
}
err = bcmgenet_validate_flow(dev, cmd);
if (err)
return err;
loc_rule = &priv->rxnfc_rules[cmd->fs.location];
if (loc_rule->state == BCMGENET_RXNFC_STATE_ENABLED)
bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
if (loc_rule->state != BCMGENET_RXNFC_STATE_UNUSED)
list_del(&loc_rule->list);
loc_rule->state = BCMGENET_RXNFC_STATE_UNUSED;
memcpy(&loc_rule->fs, &cmd->fs,
sizeof(struct ethtool_rx_flow_spec));
err = bcmgenet_hfb_create_rxnfc_filter(priv, loc_rule);
if (err) {
netdev_err(dev, "rxnfc: Could not install rule (%d)\n",
err);
return err;
}
list_add_tail(&loc_rule->list, &priv->rxnfc_list);
return 0;
}
static int bcmgenet_delete_flow(struct net_device *dev,
struct ethtool_rxnfc *cmd)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct bcmgenet_rxnfc_rule *rule;
int err = 0;
if (cmd->fs.location >= MAX_NUM_OF_FS_RULES)
return -EINVAL;
rule = &priv->rxnfc_rules[cmd->fs.location];
if (rule->state == BCMGENET_RXNFC_STATE_UNUSED) {
err = -ENOENT;
goto out;
}
if (rule->state == BCMGENET_RXNFC_STATE_ENABLED)
bcmgenet_hfb_disable_filter(priv, cmd->fs.location);
if (rule->state != BCMGENET_RXNFC_STATE_UNUSED)
list_del(&rule->list);
rule->state = BCMGENET_RXNFC_STATE_UNUSED;
memset(&rule->fs, 0, sizeof(struct ethtool_rx_flow_spec));
out:
return err;
}
static int bcmgenet_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
int err = 0;
switch (cmd->cmd) {
case ETHTOOL_SRXCLSRLINS:
err = bcmgenet_insert_flow(dev, cmd);
break;
case ETHTOOL_SRXCLSRLDEL:
err = bcmgenet_delete_flow(dev, cmd);
break;
default:
netdev_warn(priv->dev, "Unsupported ethtool command. (%d)\n",
cmd->cmd);
return -EINVAL;
}
return err;
}
static int bcmgenet_get_flow(struct net_device *dev, struct ethtool_rxnfc *cmd,
int loc)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct bcmgenet_rxnfc_rule *rule;
int err = 0;
if (loc < 0 || loc >= MAX_NUM_OF_FS_RULES)
return -EINVAL;
rule = &priv->rxnfc_rules[loc];
if (rule->state == BCMGENET_RXNFC_STATE_UNUSED)
err = -ENOENT;
else
memcpy(&cmd->fs, &rule->fs,
sizeof(struct ethtool_rx_flow_spec));
return err;
}
static int bcmgenet_get_num_flows(struct bcmgenet_priv *priv)
{
struct list_head *pos;
int res = 0;
list_for_each(pos, &priv->rxnfc_list)
res++;
return res;
}
static int bcmgenet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
u32 *rule_locs)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct bcmgenet_rxnfc_rule *rule;
int err = 0;
int i = 0;
switch (cmd->cmd) {
case ETHTOOL_GRXRINGS:
cmd->data = priv->hw_params->rx_queues ?: 1;
break;
case ETHTOOL_GRXCLSRLCNT:
cmd->rule_cnt = bcmgenet_get_num_flows(priv);
cmd->data = MAX_NUM_OF_FS_RULES;
break;
case ETHTOOL_GRXCLSRULE:
err = bcmgenet_get_flow(dev, cmd, cmd->fs.location);
break;
case ETHTOOL_GRXCLSRLALL:
list_for_each_entry(rule, &priv->rxnfc_list, list)
if (i < cmd->rule_cnt)
rule_locs[i++] = rule->fs.location;
cmd->rule_cnt = i;
cmd->data = MAX_NUM_OF_FS_RULES;
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
/* standard ethtool support functions. */
static const struct ethtool_ops bcmgenet_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
@ -1221,6 +1667,8 @@ static const struct ethtool_ops bcmgenet_ethtool_ops = {
.get_link_ksettings = bcmgenet_get_link_ksettings,
.set_link_ksettings = bcmgenet_set_link_ksettings,
.get_ts_info = ethtool_op_get_ts_info,
.get_rxnfc = bcmgenet_get_rxnfc,
.set_rxnfc = bcmgenet_set_rxnfc,
};
/* Power down the unimac, based on mode. */
@ -3730,8 +4178,8 @@ static int bcmgenet_resume(struct device *d)
struct net_device *dev = dev_get_drvdata(d);
struct bcmgenet_priv *priv = netdev_priv(dev);
unsigned long dma_ctrl;
u32 offset, reg;
int ret;
u32 reg;
if (!netif_running(dev))
return 0;
@ -3766,6 +4214,11 @@ static int bcmgenet_resume(struct device *d)
bcmgenet_set_hw_addr(priv, dev->dev_addr);
offset = HFB_FLT_ENABLE_V3PLUS;
bcmgenet_hfb_reg_writel(priv, priv->hfb_en[1], offset);
bcmgenet_hfb_reg_writel(priv, priv->hfb_en[2], offset + sizeof(u32));
bcmgenet_hfb_reg_writel(priv, priv->hfb_en[0], HFB_CTRL);
if (priv->internal_phy) {
reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
reg |= EXT_ENERGY_DET_MASK;
@ -3809,6 +4262,7 @@ static int bcmgenet_suspend(struct device *d)
struct net_device *dev = dev_get_drvdata(d);
struct bcmgenet_priv *priv = netdev_priv(dev);
int ret = 0;
u32 offset;
if (!netif_running(dev))
return 0;
@ -3820,6 +4274,13 @@ static int bcmgenet_suspend(struct device *d)
if (!device_may_wakeup(d))
phy_suspend(dev->phydev);
/* Preserve filter state and disable filtering */
priv->hfb_en[0] = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
offset = HFB_FLT_ENABLE_V3PLUS;
priv->hfb_en[1] = bcmgenet_hfb_reg_readl(priv, offset);
priv->hfb_en[2] = bcmgenet_hfb_reg_readl(priv, offset + sizeof(u32));
bcmgenet_hfb_reg_writel(priv, 0, HFB_CTRL);
/* Prepare the device for Wake-on-LAN and switch to the slow clock */
if (device_may_wakeup(d) && priv->wolopts)
ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);

16
drivers/net/ethernet/broadcom/genet/bcmgenet.h
View File

@ -32,6 +32,7 @@
#define DMA_MAX_BURST_LENGTH 0x10
/* misc. configuration */
#define MAX_NUM_OF_FS_RULES 16
#define CLEAR_ALL_HFB 0xFF
#define DMA_FC_THRESH_HI (TOTAL_DESC >> 4)
#define DMA_FC_THRESH_LO 5
@ -609,6 +610,18 @@ struct bcmgenet_rx_ring {
struct bcmgenet_priv *priv;
};
enum bcmgenet_rxnfc_state {
BCMGENET_RXNFC_STATE_UNUSED = 0,
BCMGENET_RXNFC_STATE_DISABLED,
BCMGENET_RXNFC_STATE_ENABLED
};
struct bcmgenet_rxnfc_rule {
struct list_head list;
struct ethtool_rx_flow_spec fs;
enum bcmgenet_rxnfc_state state;
};
/* device context */
struct bcmgenet_priv {
void __iomem *base;
@ -627,6 +640,8 @@ struct bcmgenet_priv {
struct enet_cb *rx_cbs;
unsigned int num_rx_bds;
unsigned int rx_buf_len;
struct bcmgenet_rxnfc_rule rxnfc_rules[MAX_NUM_OF_FS_RULES];
struct list_head rxnfc_list;
struct bcmgenet_rx_ring rx_rings[DESC_INDEX + 1];
@ -679,6 +694,7 @@ struct bcmgenet_priv {
u32 wolopts;
u8 sopass[SOPASS_MAX];
bool wol_active;
u32 hfb_en[3];
struct bcmgenet_mib_counters mib;