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nfp: add set ethernet header action flower offload

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Previously we did not have offloading support for set ethernet actions.
This patch enables TC flower offload of set ethernet actions.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pieter Jansen van Vuuren 2017-10-06 10:21:23 +02:00 committed by David S. Miller
parent fc53b4a701
commit da83d8fe58
2 changed files with 93 additions and 0 deletions
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85
drivers/net/ethernet/netronome/nfp/flower/action.c
View file

@ -36,6 +36,7 @@
#include <net/switchdev.h>
#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_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
@ -223,6 +224,87 @@ nfp_fl_set_vxlan(struct nfp_fl_set_vxlan *set_vxlan,
return 0;
}
static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
{
u32 oldvalue = get_unaligned((u32 *)p_exact);
u32 oldmask = get_unaligned((u32 *)p_mask);
value &= mask;
value |= oldvalue & ~mask;
put_unaligned(oldmask | mask, (u32 *)p_mask);
put_unaligned(value, (u32 *)p_exact);
}
static int
nfp_fl_set_eth(const struct tc_action *action, int idx, u32 off,
struct nfp_fl_set_eth *set_eth)
{
u16 tmp_set_eth_op;
u32 exact, mask;
if (off + 4 > ETH_ALEN * 2)
return -EOPNOTSUPP;
mask = ~tcf_pedit_mask(action, idx);
exact = tcf_pedit_val(action, idx);
if (exact & ~mask)
return -EOPNOTSUPP;
nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off],
&set_eth->eth_addr_mask[off]);
set_eth->reserved = cpu_to_be16(0);
tmp_set_eth_op = FIELD_PREP(NFP_FL_ACT_LEN_LW,
sizeof(*set_eth) >> NFP_FL_LW_SIZ) |
FIELD_PREP(NFP_FL_ACT_JMP_ID,
NFP_FL_ACTION_OPCODE_SET_ETHERNET);
set_eth->a_op = cpu_to_be16(tmp_set_eth_op);
return 0;
}
static int
nfp_fl_pedit(const struct tc_action *action, char *nfp_action, int *a_len)
{
struct nfp_fl_set_eth set_eth;
enum pedit_header_type htype;
int idx, nkeys, err;
size_t act_size;
u32 offset, cmd;
memset(&set_eth, 0, sizeof(set_eth));
nkeys = tcf_pedit_nkeys(action);
for (idx = 0; idx < nkeys; idx++) {
cmd = tcf_pedit_cmd(action, idx);
htype = tcf_pedit_htype(action, idx);
offset = tcf_pedit_offset(action, idx);
if (cmd != TCA_PEDIT_KEY_EX_CMD_SET)
return -EOPNOTSUPP;
switch (htype) {
case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
err = nfp_fl_set_eth(action, idx, offset, &set_eth);
break;
default:
return -EOPNOTSUPP;
}
if (err)
return err;
}
if (set_eth.a_op) {
act_size = sizeof(set_eth);
memcpy(nfp_action, &set_eth, act_size);
*a_len += act_size;
}
return 0;
}
static int
nfp_flower_loop_action(const struct tc_action *a,
struct nfp_fl_payload *nfp_fl, int *a_len,
@ -301,6 +383,9 @@ nfp_flower_loop_action(const struct tc_action *a,
} else if (is_tcf_tunnel_release(a)) {
/* Tunnel decap is handled by default so accept action. */
return 0;
} else if (is_tcf_pedit(a)) {
if (nfp_fl_pedit(a, &nfp_fl->action_data[*a_len], a_len))
return -EOPNOTSUPP;
} else {
/* Currently we do not handle any other actions. */
return -EOPNOTSUPP;

8
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View file

@ -77,6 +77,7 @@
#define NFP_FL_ACTION_OPCODE_PUSH_VLAN 1
#define NFP_FL_ACTION_OPCODE_POP_VLAN 2
#define NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL 6
#define NFP_FL_ACTION_OPCODE_SET_ETHERNET 7
#define NFP_FL_ACTION_OPCODE_PRE_TUNNEL 17
#define NFP_FL_ACTION_OPCODE_NUM 32
@ -107,6 +108,13 @@ enum nfp_flower_tun_type {
NFP_FL_TUNNEL_VXLAN = 2,
};
struct nfp_fl_set_eth {
__be16 a_op;
__be16 reserved;
u8 eth_addr_mask[ETH_ALEN * 2];
u8 eth_addr_val[ETH_ALEN * 2];
};
struct nfp_fl_output {
__be16 a_op;
__be16 flags;