提交 27ece1f3 编写于 作者: K Kumar Sanghvi 提交者: David S. Miller

cxgb4: add tc flower support for ETH-DMAC rewrite

Add support for ETH-DMAC Rewrite via TC-PEDIT action. Also, add
check to assert that vlan/eth-dmac rewrite actions are valid only
in combination with action egress redirect.
Signed-off-by: NKumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: NRahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: NGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 c39bff47
......@@ -32,8 +32,9 @@
* SOFTWARE.
*/
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_pedit.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_vlan.h>
#include "cxgb4.h"
......@@ -41,6 +42,11 @@
#define STATS_CHECK_PERIOD (HZ / 2)
struct ch_tc_pedit_fields pedits[] = {
PEDIT_FIELDS(ETH_, DMAC_31_0, 4, dmac, 0),
PEDIT_FIELDS(ETH_, DMAC_47_32, 2, dmac, 4),
};
static struct ch_tc_flower_entry *allocate_flower_entry(void)
{
struct ch_tc_flower_entry *new = kzalloc(sizeof(*new), GFP_KERNEL);
......@@ -254,6 +260,41 @@ static int cxgb4_validate_flow_match(struct net_device *dev,
return 0;
}
static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask,
u8 field)
{
u32 set_val = val & ~mask;
u32 offset;
u8 size;
int i;
for (i = 0; i < ARRAY_SIZE(pedits); i++) {
if (pedits[i].field == field) {
offset = pedits[i].offset;
size = pedits[i].size;
break;
}
}
memcpy((u8 *)fs + offset, &set_val, size);
}
static void process_pedit_field(struct ch_filter_specification *fs, u32 val,
u32 mask, u32 offset, u8 htype)
{
switch (htype) {
case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
switch (offset) {
case PEDIT_ETH_DMAC_31_0:
fs->newdmac = 1;
offload_pedit(fs, val, mask, ETH_DMAC_31_0);
break;
case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
if (~mask & PEDIT_ETH_DMAC_MASK)
offload_pedit(fs, val, mask, ETH_DMAC_47_32);
}
}
}
static void cxgb4_process_flow_actions(struct net_device *in,
struct tc_cls_flower_offload *cls,
struct ch_filter_specification *fs)
......@@ -296,6 +337,21 @@ static void cxgb4_process_flow_actions(struct net_device *in,
default:
break;
}
} else if (is_tcf_pedit(a)) {
u32 mask, val, offset;
int nkeys, i;
u8 htype;
nkeys = tcf_pedit_nkeys(a);
for (i = 0; i < nkeys; i++) {
htype = tcf_pedit_htype(a, i);
mask = tcf_pedit_mask(a, i);
val = tcf_pedit_val(a, i);
offset = tcf_pedit_offset(a, i);
process_pedit_field(fs, val, mask, offset,
htype);
}
}
}
}
......@@ -304,6 +360,9 @@ static int cxgb4_validate_flow_actions(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
const struct tc_action *a;
bool act_redir = false;
bool act_pedit = false;
bool act_vlan = false;
LIST_HEAD(actions);
tcf_exts_to_list(cls->exts, &actions);
......@@ -335,6 +394,7 @@ static int cxgb4_validate_flow_actions(struct net_device *dev,
__func__);
return -EINVAL;
}
act_redir = true;
} else if (is_tcf_vlan(a)) {
u16 proto = be16_to_cpu(tcf_vlan_push_proto(a));
u32 vlan_action = tcf_vlan_action(a);
......@@ -355,11 +415,57 @@ static int cxgb4_validate_flow_actions(struct net_device *dev,
__func__);
return -EOPNOTSUPP;
}
act_vlan = true;
} else if (is_tcf_pedit(a)) {
u32 mask, val, offset;
u8 cmd, htype;
int nkeys, i;
nkeys = tcf_pedit_nkeys(a);
for (i = 0; i < nkeys; i++) {
htype = tcf_pedit_htype(a, i);
cmd = tcf_pedit_cmd(a, i);
mask = tcf_pedit_mask(a, i);
val = tcf_pedit_val(a, i);
offset = tcf_pedit_offset(a, i);
if (cmd != TCA_PEDIT_KEY_EX_CMD_SET) {
netdev_err(dev, "%s: Unsupported pedit cmd\n",
__func__);
return -EOPNOTSUPP;
}
switch (htype) {
case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
switch (offset) {
case PEDIT_ETH_DMAC_31_0:
case PEDIT_ETH_DMAC_47_32_SMAC_15_0:
break;
default:
netdev_err(dev, "%s: Unsupported pedit field\n",
__func__);
return -EOPNOTSUPP;
}
break;
default:
netdev_err(dev, "%s: Unsupported pedit type\n",
__func__);
return -EOPNOTSUPP;
}
}
act_pedit = true;
} else {
netdev_err(dev, "%s: Unsupported action\n", __func__);
return -EOPNOTSUPP;
}
}
if ((act_pedit || act_vlan) && !act_redir) {
netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n",
__func__);
return -EINVAL;
}
return 0;
}
......
......@@ -54,6 +54,25 @@ struct ch_tc_flower_entry {
u32 filter_id;
};
enum {
ETH_DMAC_31_0, /* dmac bits 0.. 31 */
ETH_DMAC_47_32, /* dmac bits 32..47 */
};
struct ch_tc_pedit_fields {
u8 field;
u8 size;
u32 offset;
};
#define PEDIT_FIELDS(type, field, size, fs_field, offset) \
{ type## field, size, \
offsetof(struct ch_filter_specification, fs_field) + (offset) }
#define PEDIT_ETH_DMAC_MASK 0xffff
#define PEDIT_ETH_DMAC_31_0 0x0
#define PEDIT_ETH_DMAC_47_32_SMAC_15_0 0x4
int cxgb4_tc_flower_replace(struct net_device *dev,
struct tc_cls_flower_offload *cls);
int cxgb4_tc_flower_destroy(struct net_device *dev,
......
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