#include "bcm_sf2.h"
#include "bcm_sf2_regs.h"
+struct cfp_rule {
+ int port;
+ struct ethtool_rx_flow_spec fs;
+ struct list_head next;
+};
+
struct cfp_udf_slice_layout {
u8 slices[UDFS_PER_SLICE];
u32 mask_value;
core_writel(priv, reg, offset);
}
+static struct cfp_rule *bcm_sf2_cfp_rule_find(struct bcm_sf2_priv *priv,
+ int port, u32 location)
+{
+ struct cfp_rule *rule = NULL;
+
+ list_for_each_entry(rule, &priv->cfp.rules_list, next) {
+ if (rule->port == port && rule->fs.location == location)
+ break;
+ };
+
+ return rule;
+}
+
+static int bcm_sf2_cfp_rule_cmp(struct bcm_sf2_priv *priv, int port,
+ struct ethtool_rx_flow_spec *fs)
+{
+ struct cfp_rule *rule = NULL;
+ size_t fs_size = 0;
+ int ret = 1;
+
+ if (list_empty(&priv->cfp.rules_list))
+ return ret;
+
+ list_for_each_entry(rule, &priv->cfp.rules_list, next) {
+ ret = 1;
+ if (rule->port != port)
+ continue;
+
+ if (rule->fs.flow_type != fs->flow_type ||
+ rule->fs.ring_cookie != fs->ring_cookie ||
+ rule->fs.m_ext.data[0] != fs->m_ext.data[0])
+ continue;
+
+ switch (fs->flow_type & ~FLOW_EXT) {
+ case TCP_V6_FLOW:
+ case UDP_V6_FLOW:
+ fs_size = sizeof(struct ethtool_tcpip6_spec);
+ break;
+ case TCP_V4_FLOW:
+ case UDP_V4_FLOW:
+ fs_size = sizeof(struct ethtool_tcpip4_spec);
+ break;
+ default:
+ continue;
+ }
+
+ ret = memcmp(&rule->fs.h_u, &fs->h_u, fs_size);
+ ret |= memcmp(&rule->fs.m_u, &fs->m_u, fs_size);
+ if (ret == 0)
+ break;
+ }
+
+ return ret;
+}
+
static int bcm_sf2_cfp_ipv6_rule_set(struct bcm_sf2_priv *priv, int port,
unsigned int port_num,
unsigned int queue_num,
return ret;
}
-static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
- struct ethtool_rx_flow_spec *fs)
+static int bcm_sf2_cfp_rule_insert(struct dsa_switch *ds, int port,
+ struct ethtool_rx_flow_spec *fs)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
s8 cpu_port = ds->ports[port].cpu_dp->index;
__u64 ring_cookie = fs->ring_cookie;
unsigned int queue_num, port_num;
- int ret = -EINVAL;
-
- /* Check for unsupported extensions */
- if ((fs->flow_type & FLOW_EXT) && (fs->m_ext.vlan_etype ||
- fs->m_ext.data[1]))
- return -EINVAL;
-
- if (fs->location != RX_CLS_LOC_ANY &&
- test_bit(fs->location, priv->cfp.used))
- return -EBUSY;
-
- if (fs->location != RX_CLS_LOC_ANY &&
- fs->location > bcm_sf2_cfp_rule_size(priv))
- return -EINVAL;
+ int ret;
/* This rule is a Wake-on-LAN filter and we must specifically
* target the CPU port in order for it to be working.
queue_num, fs);
break;
default:
+ ret = -EINVAL;
break;
}
return ret;
}
+static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
+ struct ethtool_rx_flow_spec *fs)
+{
+ struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
+ struct cfp_rule *rule = NULL;
+ int ret = -EINVAL;
+
+ /* Check for unsupported extensions */
+ if ((fs->flow_type & FLOW_EXT) && (fs->m_ext.vlan_etype ||
+ fs->m_ext.data[1]))
+ return -EINVAL;
+
+ if (fs->location != RX_CLS_LOC_ANY &&
+ test_bit(fs->location, priv->cfp.used))
+ return -EBUSY;
+
+ if (fs->location != RX_CLS_LOC_ANY &&
+ fs->location > bcm_sf2_cfp_rule_size(priv))
+ return -EINVAL;
+
+ ret = bcm_sf2_cfp_rule_cmp(priv, port, fs);
+ if (ret == 0)
+ return -EEXIST;
+
+ rule = kzalloc(sizeof(*rule), GFP_KERNEL);
+ if (!rule)
+ return -ENOMEM;
+
+ ret = bcm_sf2_cfp_rule_insert(ds, port, fs);
+ if (ret) {
+ kfree(rule);
+ return ret;
+ }
+
+ rule->port = port;
+ memcpy(&rule->fs, fs, sizeof(*fs));
+ list_add_tail(&rule->next, &priv->cfp.rules_list);
+
+ return ret;
+}
+
static int bcm_sf2_cfp_rule_del_one(struct bcm_sf2_priv *priv, int port,
u32 loc, u32 *next_loc)
{
return 0;
}
-static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port,
- u32 loc)
+static int bcm_sf2_cfp_rule_remove(struct bcm_sf2_priv *priv, int port,
+ u32 loc)
{
u32 next_loc = 0;
int ret;
- /* Refuse deleting unused rules, and those that are not unique since
- * that could leave IPv6 rules with one of the chained rule in the
- * table.
- */
- if (!test_bit(loc, priv->cfp.unique) || loc == 0)
- return -EINVAL;
-
ret = bcm_sf2_cfp_rule_del_one(priv, port, loc, &next_loc);
if (ret)
return ret;
return ret;
}
-static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow)
+static int bcm_sf2_cfp_rule_del(struct bcm_sf2_priv *priv, int port, u32 loc)
{
- unsigned int i;
-
- for (i = 0; i < sizeof(flow->m_u); i++)
- flow->m_u.hdata[i] ^= 0xff;
-
- flow->m_ext.vlan_etype ^= cpu_to_be16(~0);
- flow->m_ext.vlan_tci ^= cpu_to_be16(~0);
- flow->m_ext.data[0] ^= cpu_to_be32(~0);
- flow->m_ext.data[1] ^= cpu_to_be32(~0);
-}
-
-static int bcm_sf2_cfp_unslice_ipv4(struct bcm_sf2_priv *priv,
- struct ethtool_tcpip4_spec *v4_spec,
- bool mask)
-{
- u32 reg, offset, ipv4;
- u16 src_dst_port;
-
- if (mask)
- offset = CORE_CFP_MASK_PORT(3);
- else
- offset = CORE_CFP_DATA_PORT(3);
-
- reg = core_readl(priv, offset);
- /* src port [15:8] */
- src_dst_port = reg << 8;
-
- if (mask)
- offset = CORE_CFP_MASK_PORT(2);
- else
- offset = CORE_CFP_DATA_PORT(2);
-
- reg = core_readl(priv, offset);
- /* src port [7:0] */
- src_dst_port |= (reg >> 24);
-
- v4_spec->pdst = cpu_to_be16(src_dst_port);
- v4_spec->psrc = cpu_to_be16((u16)(reg >> 8));
-
- /* IPv4 dst [15:8] */
- ipv4 = (reg & 0xff) << 8;
-
- if (mask)
- offset = CORE_CFP_MASK_PORT(1);
- else
- offset = CORE_CFP_DATA_PORT(1);
-
- reg = core_readl(priv, offset);
- /* IPv4 dst [31:16] */
- ipv4 |= ((reg >> 8) & 0xffff) << 16;
- /* IPv4 dst [7:0] */
- ipv4 |= (reg >> 24) & 0xff;
- v4_spec->ip4dst = cpu_to_be32(ipv4);
-
- /* IPv4 src [15:8] */
- ipv4 = (reg & 0xff) << 8;
-
- if (mask)
- offset = CORE_CFP_MASK_PORT(0);
- else
- offset = CORE_CFP_DATA_PORT(0);
- reg = core_readl(priv, offset);
+ struct cfp_rule *rule;
+ int ret;
- /* Once the TCAM is programmed, the mask reflects the slice number
- * being matched, don't bother checking it when reading back the
- * mask spec
+ /* Refuse deleting unused rules, and those that are not unique since
+ * that could leave IPv6 rules with one of the chained rule in the
+ * table.
*/
- if (!mask && !(reg & SLICE_VALID))
+ if (!test_bit(loc, priv->cfp.unique) || loc == 0)
return -EINVAL;
- /* IPv4 src [7:0] */
- ipv4 |= (reg >> 24) & 0xff;
- /* IPv4 src [31:16] */
- ipv4 |= ((reg >> 8) & 0xffff) << 16;
- v4_spec->ip4src = cpu_to_be32(ipv4);
-
- return 0;
-}
-
-static int bcm_sf2_cfp_ipv4_rule_get(struct bcm_sf2_priv *priv, int port,
- struct ethtool_rx_flow_spec *fs)
-{
- struct ethtool_tcpip4_spec *v4_spec = NULL, *v4_m_spec = NULL;
- u32 reg;
- int ret;
-
- reg = core_readl(priv, CORE_CFP_DATA_PORT(6));
-
- switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {
- case IPPROTO_TCP:
- fs->flow_type = TCP_V4_FLOW;
- v4_spec = &fs->h_u.tcp_ip4_spec;
- v4_m_spec = &fs->m_u.tcp_ip4_spec;
- break;
- case IPPROTO_UDP:
- fs->flow_type = UDP_V4_FLOW;
- v4_spec = &fs->h_u.udp_ip4_spec;
- v4_m_spec = &fs->m_u.udp_ip4_spec;
- break;
- default:
+ rule = bcm_sf2_cfp_rule_find(priv, port, loc);
+ if (!rule)
return -EINVAL;
- }
-
- fs->m_ext.data[0] = cpu_to_be32((reg >> IP_FRAG_SHIFT) & 1);
- v4_spec->tos = (reg >> IPTOS_SHIFT) & IPTOS_MASK;
-
- ret = bcm_sf2_cfp_unslice_ipv4(priv, v4_spec, false);
- if (ret)
- return ret;
-
- return bcm_sf2_cfp_unslice_ipv4(priv, v4_m_spec, true);
-}
-static int bcm_sf2_cfp_unslice_ipv6(struct bcm_sf2_priv *priv,
- __be32 *ip6_addr, __be16 *port,
- bool mask)
-{
- u32 reg, tmp, offset;
+ ret = bcm_sf2_cfp_rule_remove(priv, port, loc);
- /* C-Tag [31:24]
- * UDF_n_B8 [23:8] (port)
- * UDF_n_B7 (upper) [7:0] (addr[15:8])
- */
- if (mask)
- offset = CORE_CFP_MASK_PORT(4);
- else
- offset = CORE_CFP_DATA_PORT(4);
- reg = core_readl(priv, offset);
- *port = cpu_to_be32(reg) >> 8;
- tmp = (u32)(reg & 0xff) << 8;
+ list_del(&rule->next);
+ kfree(rule);
- /* UDF_n_B7 (lower) [31:24] (addr[7:0])
- * UDF_n_B6 [23:8] (addr[31:16])
- * UDF_n_B5 (upper) [7:0] (addr[47:40])
- */
- if (mask)
- offset = CORE_CFP_MASK_PORT(3);
- else
- offset = CORE_CFP_DATA_PORT(3);
- reg = core_readl(priv, offset);
- tmp |= (reg >> 24) & 0xff;
- tmp |= (u32)((reg >> 8) << 16);
- ip6_addr[3] = cpu_to_be32(tmp);
- tmp = (u32)(reg & 0xff) << 8;
-
- /* UDF_n_B5 (lower) [31:24] (addr[39:32])
- * UDF_n_B4 [23:8] (addr[63:48])
- * UDF_n_B3 (upper) [7:0] (addr[79:72])
- */
- if (mask)
- offset = CORE_CFP_MASK_PORT(2);
- else
- offset = CORE_CFP_DATA_PORT(2);
- reg = core_readl(priv, offset);
- tmp |= (reg >> 24) & 0xff;
- tmp |= (u32)((reg >> 8) << 16);
- ip6_addr[2] = cpu_to_be32(tmp);
- tmp = (u32)(reg & 0xff) << 8;
-
- /* UDF_n_B3 (lower) [31:24] (addr[71:64])
- * UDF_n_B2 [23:8] (addr[95:80])
- * UDF_n_B1 (upper) [7:0] (addr[111:104])
- */
- if (mask)
- offset = CORE_CFP_MASK_PORT(1);
- else
- offset = CORE_CFP_DATA_PORT(1);
- reg = core_readl(priv, offset);
- tmp |= (reg >> 24) & 0xff;
- tmp |= (u32)((reg >> 8) << 16);
- ip6_addr[1] = cpu_to_be32(tmp);
- tmp = (u32)(reg & 0xff) << 8;
-
- /* UDF_n_B1 (lower) [31:24] (addr[103:96])
- * UDF_n_B0 [23:8] (addr[127:112])
- * Reserved [7:4]
- * Slice ID [3:2]
- * Slice valid [1:0]
- */
- if (mask)
- offset = CORE_CFP_MASK_PORT(0);
- else
- offset = CORE_CFP_DATA_PORT(0);
- reg = core_readl(priv, offset);
- tmp |= (reg >> 24) & 0xff;
- tmp |= (u32)((reg >> 8) << 16);
- ip6_addr[0] = cpu_to_be32(tmp);
-
- if (!mask && !(reg & SLICE_VALID))
- return -EINVAL;
-
- return 0;
+ return ret;
}
-static int bcm_sf2_cfp_ipv6_rule_get(struct bcm_sf2_priv *priv, int port,
- struct ethtool_rx_flow_spec *fs,
- u32 next_loc)
+static void bcm_sf2_invert_masks(struct ethtool_rx_flow_spec *flow)
{
- struct ethtool_tcpip6_spec *v6_spec = NULL, *v6_m_spec = NULL;
- u32 reg;
- int ret;
-
- /* UDPv6 and TCPv6 both use ethtool_tcpip6_spec so we are fine
- * assuming tcp_ip6_spec here being an union.
- */
- v6_spec = &fs->h_u.tcp_ip6_spec;
- v6_m_spec = &fs->m_u.tcp_ip6_spec;
-
- /* Read the second half first */
- ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_spec->ip6dst, &v6_spec->pdst,
- false);
- if (ret)
- return ret;
-
- ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_m_spec->ip6dst,
- &v6_m_spec->pdst, true);
- if (ret)
- return ret;
-
- /* Read last to avoid next entry clobbering the results during search
- * operations. We would not have the port enabled for this rule, so
- * don't bother checking it.
- */
- (void)core_readl(priv, CORE_CFP_DATA_PORT(7));
-
- /* The slice number is valid, so read the rule we are chained from now
- * which is our first half.
- */
- bcm_sf2_cfp_rule_addr_set(priv, next_loc);
- ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);
- if (ret)
- return ret;
-
- reg = core_readl(priv, CORE_CFP_DATA_PORT(6));
-
- switch ((reg & IPPROTO_MASK) >> IPPROTO_SHIFT) {
- case IPPROTO_TCP:
- fs->flow_type = TCP_V6_FLOW;
- break;
- case IPPROTO_UDP:
- fs->flow_type = UDP_V6_FLOW;
- break;
- default:
- return -EINVAL;
- }
+ unsigned int i;
- ret = bcm_sf2_cfp_unslice_ipv6(priv, v6_spec->ip6src, &v6_spec->psrc,
- false);
- if (ret)
- return ret;
+ for (i = 0; i < sizeof(flow->m_u); i++)
+ flow->m_u.hdata[i] ^= 0xff;
- return bcm_sf2_cfp_unslice_ipv6(priv, v6_m_spec->ip6src,
- &v6_m_spec->psrc, true);
+ flow->m_ext.vlan_etype ^= cpu_to_be16(~0);
+ flow->m_ext.vlan_tci ^= cpu_to_be16(~0);
+ flow->m_ext.data[0] ^= cpu_to_be32(~0);
+ flow->m_ext.data[1] ^= cpu_to_be32(~0);
}
static int bcm_sf2_cfp_rule_get(struct bcm_sf2_priv *priv, int port,
struct ethtool_rxnfc *nfc)
{
- u32 reg, ipv4_or_chain_id;
- unsigned int queue_num;
- int ret;
-
- bcm_sf2_cfp_rule_addr_set(priv, nfc->fs.location);
-
- ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | ACT_POL_RAM);
- if (ret)
- return ret;
+ struct cfp_rule *rule;
- reg = core_readl(priv, CORE_ACT_POL_DATA0);
-
- ret = bcm_sf2_cfp_op(priv, OP_SEL_READ | TCAM_SEL);
- if (ret)
- return ret;
-
- /* Extract the destination port */
- nfc->fs.ring_cookie = fls((reg >> DST_MAP_IB_SHIFT) &
- DST_MAP_IB_MASK) - 1;
-
- /* There is no Port 6, so we compensate for that here */
- if (nfc->fs.ring_cookie >= 6)
- nfc->fs.ring_cookie++;
- nfc->fs.ring_cookie *= SF2_NUM_EGRESS_QUEUES;
-
- /* Extract the destination queue */
- queue_num = (reg >> NEW_TC_SHIFT) & NEW_TC_MASK;
- nfc->fs.ring_cookie += queue_num;
-
- /* Extract the L3_FRAMING or CHAIN_ID */
- reg = core_readl(priv, CORE_CFP_DATA_PORT(6));
-
- /* With IPv6 rules this would contain a non-zero chain ID since
- * we reserve entry 0 and it cannot be used. So if we read 0 here
- * this means an IPv4 rule.
- */
- ipv4_or_chain_id = (reg >> L3_FRAMING_SHIFT) & 0xff;
- if (ipv4_or_chain_id == 0)
- ret = bcm_sf2_cfp_ipv4_rule_get(priv, port, &nfc->fs);
- else
- ret = bcm_sf2_cfp_ipv6_rule_get(priv, port, &nfc->fs,
- ipv4_or_chain_id);
- if (ret)
- return ret;
-
- /* Read last to avoid next entry clobbering the results during search
- * operations
- */
- reg = core_readl(priv, CORE_CFP_DATA_PORT(7));
- if (!(reg & 1 << port))
+ rule = bcm_sf2_cfp_rule_find(priv, port, nfc->fs.location);
+ if (!rule)
return -EINVAL;
+ memcpy(&nfc->fs, &rule->fs, sizeof(rule->fs));
+
bcm_sf2_invert_masks(&nfc->fs);
/* Put the TCAM size here */
return 0;
}
+
+void bcm_sf2_cfp_exit(struct dsa_switch *ds)
+{
+ struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
+ struct cfp_rule *rule, *n;
+
+ if (list_empty(&priv->cfp.rules_list))
+ return;
+
+ list_for_each_entry_safe_reverse(rule, n, &priv->cfp.rules_list, next)
+ bcm_sf2_cfp_rule_del(priv, rule->port, rule->fs.location);
+}
+
+int bcm_sf2_cfp_resume(struct dsa_switch *ds)
+{
+ struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
+ struct cfp_rule *rule;
+ int ret = 0;
+ u32 reg;
+
+ if (list_empty(&priv->cfp.rules_list))
+ return ret;
+
+ reg = core_readl(priv, CORE_CFP_CTL_REG);
+ reg &= ~CFP_EN_MAP_MASK;
+ core_writel(priv, reg, CORE_CFP_CTL_REG);
+
+ ret = bcm_sf2_cfp_rst(priv);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(rule, &priv->cfp.rules_list, next) {
+ ret = bcm_sf2_cfp_rule_remove(priv, rule->port,
+ rule->fs.location);
+ if (ret) {
+ dev_err(ds->dev, "failed to remove rule\n");
+ return ret;
+ }
+
+ ret = bcm_sf2_cfp_rule_insert(ds, rule->port, &rule->fs);
+ if (ret) {
+ dev_err(ds->dev, "failed to restore rule\n");
+ return ret;
+ }
+ };
+
+ return ret;
+}
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