Commit 3eb8b62d authored by Kumar Sanghvi's avatar Kumar Sanghvi Committed by David S. Miller

cxgb4: add support to create hash-filters via tc-flower offload

Determine whether the flow classifies as exact-match with respect to
4-tuple and configured tuple mask in hw. If successfully classified
as exact-match, offload the flow as hash-filter in hw.
Signed-off-by: default avatarKumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: default avatarRahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: default avatarGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 79e6d46a
......@@ -31,6 +31,7 @@
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <net/ipv6.h>
#include "cxgb4.h"
#include "t4_regs.h"
......@@ -765,6 +766,153 @@ static void fill_default_mask(struct ch_filter_specification *fs)
fs->mask.fport = ~0;
}
static bool is_addr_all_mask(u8 *ipmask, int family)
{
if (family == AF_INET) {
struct in_addr *addr;
addr = (struct in_addr *)ipmask;
if (addr->s_addr == 0xffffffff)
return true;
} else if (family == AF_INET6) {
struct in6_addr *addr6;
addr6 = (struct in6_addr *)ipmask;
if (addr6->s6_addr32[0] == 0xffffffff &&
addr6->s6_addr32[1] == 0xffffffff &&
addr6->s6_addr32[2] == 0xffffffff &&
addr6->s6_addr32[3] == 0xffffffff)
return true;
}
return false;
}
static bool is_inaddr_any(u8 *ip, int family)
{
int addr_type;
if (family == AF_INET) {
struct in_addr *addr;
addr = (struct in_addr *)ip;
if (addr->s_addr == htonl(INADDR_ANY))
return true;
} else if (family == AF_INET6) {
struct in6_addr *addr6;
addr6 = (struct in6_addr *)ip;
addr_type = ipv6_addr_type((const struct in6_addr *)
&addr6);
if (addr_type == IPV6_ADDR_ANY)
return true;
}
return false;
}
bool is_filter_exact_match(struct adapter *adap,
struct ch_filter_specification *fs)
{
struct tp_params *tp = &adap->params.tp;
u64 hash_filter_mask = tp->hash_filter_mask;
u32 mask;
if (!is_hashfilter(adap))
return false;
if (fs->type) {
if (is_inaddr_any(fs->val.fip, AF_INET6) ||
!is_addr_all_mask(fs->mask.fip, AF_INET6))
return false;
if (is_inaddr_any(fs->val.lip, AF_INET6) ||
!is_addr_all_mask(fs->mask.lip, AF_INET6))
return false;
} else {
if (is_inaddr_any(fs->val.fip, AF_INET) ||
!is_addr_all_mask(fs->mask.fip, AF_INET))
return false;
if (is_inaddr_any(fs->val.lip, AF_INET) ||
!is_addr_all_mask(fs->mask.lip, AF_INET))
return false;
}
if (!fs->val.lport || fs->mask.lport != 0xffff)
return false;
if (!fs->val.fport || fs->mask.fport != 0xffff)
return false;
if (tp->fcoe_shift >= 0) {
mask = (hash_filter_mask >> tp->fcoe_shift) & FT_FCOE_W;
if (mask && !fs->mask.fcoe)
return false;
}
if (tp->port_shift >= 0) {
mask = (hash_filter_mask >> tp->port_shift) & FT_PORT_W;
if (mask && !fs->mask.iport)
return false;
}
if (tp->vnic_shift >= 0) {
mask = (hash_filter_mask >> tp->vnic_shift) & FT_VNIC_ID_W;
if ((adap->params.tp.ingress_config & VNIC_F)) {
if (mask && !fs->mask.pfvf_vld)
return false;
} else {
if (mask && !fs->mask.ovlan_vld)
return false;
}
}
if (tp->vlan_shift >= 0) {
mask = (hash_filter_mask >> tp->vlan_shift) & FT_VLAN_W;
if (mask && !fs->mask.ivlan)
return false;
}
if (tp->tos_shift >= 0) {
mask = (hash_filter_mask >> tp->tos_shift) & FT_TOS_W;
if (mask && !fs->mask.tos)
return false;
}
if (tp->protocol_shift >= 0) {
mask = (hash_filter_mask >> tp->protocol_shift) & FT_PROTOCOL_W;
if (mask && !fs->mask.proto)
return false;
}
if (tp->ethertype_shift >= 0) {
mask = (hash_filter_mask >> tp->ethertype_shift) &
FT_ETHERTYPE_W;
if (mask && !fs->mask.ethtype)
return false;
}
if (tp->macmatch_shift >= 0) {
mask = (hash_filter_mask >> tp->macmatch_shift) & FT_MACMATCH_W;
if (mask && !fs->mask.macidx)
return false;
}
if (tp->matchtype_shift >= 0) {
mask = (hash_filter_mask >> tp->matchtype_shift) &
FT_MPSHITTYPE_W;
if (mask && !fs->mask.matchtype)
return false;
}
if (tp->frag_shift >= 0) {
mask = (hash_filter_mask >> tp->frag_shift) &
FT_FRAGMENTATION_W;
if (mask && !fs->mask.frag)
return false;
}
return true;
}
static u64 hash_filter_ntuple(struct ch_filter_specification *fs,
struct net_device *dev)
{
......
......@@ -51,4 +51,6 @@ int delete_filter(struct adapter *adapter, unsigned int fidx);
int writable_filter(struct filter_entry *f);
void clear_all_filters(struct adapter *adapter);
int init_hash_filter(struct adapter *adap);
bool is_filter_exact_match(struct adapter *adap,
struct ch_filter_specification *fs);
#endif /* __CXGB4_FILTER_H */
......@@ -38,6 +38,7 @@
#include <net/tc_act/tc_vlan.h>
#include "cxgb4.h"
#include "cxgb4_filter.h"
#include "cxgb4_tc_flower.h"
#define STATS_CHECK_PERIOD (HZ / 2)
......@@ -672,11 +673,16 @@ int cxgb4_tc_flower_replace(struct net_device *dev,
cxgb4_process_flow_match(dev, cls, fs);
cxgb4_process_flow_actions(dev, cls, fs);
fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET);
if (fidx < 0) {
netdev_err(dev, "%s: No fidx for offload.\n", __func__);
ret = -ENOMEM;
goto free_entry;
fs->hash = is_filter_exact_match(adap, fs);
if (fs->hash) {
fidx = 0;
} else {
fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET);
if (fidx < 0) {
netdev_err(dev, "%s: No fidx for offload.\n", __func__);
ret = -ENOMEM;
goto free_entry;
}
}
init_completion(&ctx.completion);
......
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