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Merge branch 'net-dpipe'

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Jiri Pirko says:

====================
Add support for pipeline debug (dpipe)

Arkadi says:

While doing the hardware offloading process much of the hardware
specifics cannot be presented. An example for such is the routing
LPM algorithm which differ in hardware implementation from the
kernel software implementation. The only information the user receives
is whether specific route is offloaded or not, but he cannot really
understand the underlying implementation nor get the specific statistics
related to that process.

Another example is ACL offload using TC which is commonly implemented
using TCAM memory. Currently there is no capability to gain visibility
into the TCAM structure and to debug suboptimal resource allocation.

This patchset introduces capability for exporting the ASICs pipeline
abstraction via devlink infrastructure, which should serve as an
complementary tool. This infrastructure allows the user to get visibility
into the ASIC by modeling it as a set of match/action tables.

The main objects defined:
Table - abstraction for a single pipeline stage. Contains the
        available match/actions and counter availability.
Entry - entry in a specific table with specific matches/actions
        values and dedicated counter.
Header/field - tuples which describes the tables behavior.

As an example one of the ASIC's L3 blocks will be modeled. The egress
rif (router interface) table is the final step in the L3 pipeline
processing which does match on the internal rif index which was
determined before by the routing logic. The erif table determines
whether to forward or drop the packet and updates the corresponding
rif L3 statistics.

To expose this internal resources a special metadata header will
be introduced that describes the internal information gathered by
the ASIC's pipeline and contains the following fields: rif_port_index,
forward and drop.

Some internal hardware resources have direct mapping to kernel
objects. For example the rif_port_index is mapped to the net-devices
ifindex. By providing this mapping the users gains visibility into
the offloading process.

Follow-up work will include exporting more L3 tables which will give
visibility into the routing process.

First stage is adding support for dpipe in devlink. Next add support
in spectrum driver. Finally implement egress router interface
(erif) table for spectrum ASIC as an example.

---
v1->v2: Please see individual patches
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-03-28 17:11:56 -07:00
commit 2a69ca7148
13 changed files with 1989 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/mellanox/mlxsw/Makefile
View File

@ -16,7 +16,7 @@ mlxsw_spectrum-objs := spectrum.o spectrum_buffers.o \
spectrum_switchdev.o spectrum_router.o \
spectrum_kvdl.o spectrum_acl_tcam.o \
spectrum_acl.o spectrum_flower.o \
spectrum_cnt.o
spectrum_cnt.o spectrum_dpipe.o
mlxsw_spectrum-$(CONFIG_MLXSW_SPECTRUM_DCB) += spectrum_dcb.o
obj-$(CONFIG_MLXSW_MINIMAL) += mlxsw_minimal.o
mlxsw_minimal-objs := minimal.o

178
drivers/net/ethernet/mellanox/mlxsw/reg.h
View File

@ -4125,6 +4125,60 @@ MLXSW_ITEM32(reg, ritr, sp_if_system_port, 0x08, 0, 16);
*/
MLXSW_ITEM32(reg, ritr, sp_if_vid, 0x18, 0, 12);
/* Shared between ingress/egress */
enum mlxsw_reg_ritr_counter_set_type {
/* No Count. */
MLXSW_REG_RITR_COUNTER_SET_TYPE_NO_COUNT = 0x0,
/* Basic. Used for router interfaces, counting the following:
* - Error and Discard counters.
* - Unicast, Multicast and Broadcast counters. Sharing the
* same set of counters for the different type of traffic
* (IPv4, IPv6 and mpls).
*/
MLXSW_REG_RITR_COUNTER_SET_TYPE_BASIC = 0x9,
};
/* reg_ritr_ingress_counter_index
* Counter Index for flow counter.
* Access: RW
*/
MLXSW_ITEM32(reg, ritr, ingress_counter_index, 0x38, 0, 24);
/* reg_ritr_ingress_counter_set_type
* Igress Counter Set Type for router interface counter.
* Access: RW
*/
MLXSW_ITEM32(reg, ritr, ingress_counter_set_type, 0x38, 24, 8);
/* reg_ritr_egress_counter_index
* Counter Index for flow counter.
* Access: RW
*/
MLXSW_ITEM32(reg, ritr, egress_counter_index, 0x3C, 0, 24);
/* reg_ritr_egress_counter_set_type
* Egress Counter Set Type for router interface counter.
* Access: RW
*/
MLXSW_ITEM32(reg, ritr, egress_counter_set_type, 0x3C, 24, 8);
static inline void mlxsw_reg_ritr_counter_pack(char *payload, u32 index,
bool enable, bool egress)
{
enum mlxsw_reg_ritr_counter_set_type set_type;
if (enable)
set_type = MLXSW_REG_RITR_COUNTER_SET_TYPE_BASIC;
else
set_type = MLXSW_REG_RITR_COUNTER_SET_TYPE_NO_COUNT;
mlxsw_reg_ritr_egress_counter_set_type_set(payload, set_type);
if (egress)
mlxsw_reg_ritr_egress_counter_index_set(payload, index);
else
mlxsw_reg_ritr_ingress_counter_index_set(payload, index);
}
static inline void mlxsw_reg_ritr_rif_pack(char *payload, u16 rif)
{
MLXSW_REG_ZERO(ritr, payload);
@ -4287,6 +4341,129 @@ static inline void mlxsw_reg_ratr_eth_entry_pack(char *payload,
mlxsw_reg_ratr_eth_destination_mac_memcpy_to(payload, dest_mac);
}
/* RICNT - Router Interface Counter Register
* -----------------------------------------
* The RICNT register retrieves per port performance counters
*/
#define MLXSW_REG_RICNT_ID 0x800B
#define MLXSW_REG_RICNT_LEN 0x100
MLXSW_REG_DEFINE(ricnt, MLXSW_REG_RICNT_ID, MLXSW_REG_RICNT_LEN);
/* reg_ricnt_counter_index
* Counter index
* Access: RW
*/
MLXSW_ITEM32(reg, ricnt, counter_index, 0x04, 0, 24);
enum mlxsw_reg_ricnt_counter_set_type {
/* No Count. */
MLXSW_REG_RICNT_COUNTER_SET_TYPE_NO_COUNT = 0x00,
/* Basic. Used for router interfaces, counting the following:
* - Error and Discard counters.
* - Unicast, Multicast and Broadcast counters. Sharing the
* same set of counters for the different type of traffic
* (IPv4, IPv6 and mpls).
*/
MLXSW_REG_RICNT_COUNTER_SET_TYPE_BASIC = 0x09,
};
/* reg_ricnt_counter_set_type
* Counter Set Type for router interface counter
* Access: RW
*/
MLXSW_ITEM32(reg, ricnt, counter_set_type, 0x04, 24, 8);
enum mlxsw_reg_ricnt_opcode {
/* Nop. Supported only for read access*/
MLXSW_REG_RICNT_OPCODE_NOP = 0x00,
/* Clear. Setting the clr bit will reset the counter value for
* all counters of the specified Router Interface.
*/
MLXSW_REG_RICNT_OPCODE_CLEAR = 0x08,
};
/* reg_ricnt_opcode
* Opcode
* Access: RW
*/
MLXSW_ITEM32(reg, ricnt, op, 0x00, 28, 4);
/* reg_ricnt_good_unicast_packets
* good unicast packets.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_unicast_packets, 0x08, 0, 64);
/* reg_ricnt_good_multicast_packets
* good multicast packets.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_multicast_packets, 0x10, 0, 64);
/* reg_ricnt_good_broadcast_packets
* good broadcast packets
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_broadcast_packets, 0x18, 0, 64);
/* reg_ricnt_good_unicast_bytes
* A count of L3 data and padding octets not including L2 headers
* for good unicast frames.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_unicast_bytes, 0x20, 0, 64);
/* reg_ricnt_good_multicast_bytes
* A count of L3 data and padding octets not including L2 headers
* for good multicast frames.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_multicast_bytes, 0x28, 0, 64);
/* reg_ritr_good_broadcast_bytes
* A count of L3 data and padding octets not including L2 headers
* for good broadcast frames.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, good_broadcast_bytes, 0x30, 0, 64);
/* reg_ricnt_error_packets
* A count of errored frames that do not pass the router checks.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, error_packets, 0x38, 0, 64);
/* reg_ricnt_discrad_packets
* A count of non-errored frames that do not pass the router checks.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, discard_packets, 0x40, 0, 64);
/* reg_ricnt_error_bytes
* A count of L3 data and padding octets not including L2 headers
* for errored frames.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, error_bytes, 0x48, 0, 64);
/* reg_ricnt_discard_bytes
* A count of L3 data and padding octets not including L2 headers
* for non-errored frames that do not pass the router checks.
* Access: RW
*/
MLXSW_ITEM64(reg, ricnt, discard_bytes, 0x50, 0, 64);
static inline void mlxsw_reg_ricnt_pack(char *payload, u32 index,
enum mlxsw_reg_ricnt_opcode op)
{
MLXSW_REG_ZERO(ricnt, payload);
mlxsw_reg_ricnt_op_set(payload, op);
mlxsw_reg_ricnt_counter_index_set(payload, index);
mlxsw_reg_ricnt_counter_set_type_set(payload,
MLXSW_REG_RICNT_COUNTER_SET_TYPE_BASIC);
}
/* RALTA - Router Algorithmic LPM Tree Allocation Register
* -------------------------------------------------------
* RALTA is used to allocate the LPM trees of the SHSPM method.
@ -6026,6 +6203,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
MLXSW_REG(rgcr),
MLXSW_REG(ritr),
MLXSW_REG(ratr),
MLXSW_REG(ricnt),
MLXSW_REG(ralta),
MLXSW_REG(ralst),
MLXSW_REG(raltb),

2
drivers/net/ethernet/mellanox/mlxsw/resources.h
View File

@ -46,6 +46,7 @@ enum mlxsw_res_id {
MLXSW_RES_ID_COUNTER_POOL_SIZE,
MLXSW_RES_ID_MAX_SPAN,
MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES,
MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC,
MLXSW_RES_ID_MAX_SYSTEM_PORT,
MLXSW_RES_ID_MAX_LAG,
MLXSW_RES_ID_MAX_LAG_MEMBERS,
@ -82,6 +83,7 @@ static u16 mlxsw_res_ids[] = {
[MLXSW_RES_ID_COUNTER_POOL_SIZE] = 0x2410,
[MLXSW_RES_ID_MAX_SPAN] = 0x2420,
[MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES] = 0x2443,
[MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC] = 0x2449,
[MLXSW_RES_ID_MAX_SYSTEM_PORT] = 0x2502,
[MLXSW_RES_ID_MAX_LAG] = 0x2520,
[MLXSW_RES_ID_MAX_LAG_MEMBERS] = 0x2521,

10
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View File

@ -67,6 +67,7 @@
#include "trap.h"
#include "txheader.h"
#include "spectrum_cnt.h"
#include "spectrum_dpipe.h"
static const char mlxsw_sp_driver_name[] = "mlxsw_spectrum";
static const char mlxsw_sp_driver_version[] = "1.0";
@ -3339,6 +3340,12 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
goto err_counter_pool_init;
}
err = mlxsw_sp_dpipe_init(mlxsw_sp);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to init pipeline debug\n");
goto err_dpipe_init;
}
err = mlxsw_sp_ports_create(mlxsw_sp);
if (err) {
dev_err(mlxsw_sp->bus_info->dev, "Failed to create ports\n");
@ -3348,6 +3355,8 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
return 0;
err_ports_create:
mlxsw_sp_dpipe_fini(mlxsw_sp);
err_dpipe_init:
mlxsw_sp_counter_pool_fini(mlxsw_sp);
err_counter_pool_init:
mlxsw_sp_acl_fini(mlxsw_sp);
@ -3372,6 +3381,7 @@ static void mlxsw_sp_fini(struct mlxsw_core *mlxsw_core)
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
mlxsw_sp_ports_remove(mlxsw_sp);
mlxsw_sp_dpipe_fini(mlxsw_sp);
mlxsw_sp_counter_pool_fini(mlxsw_sp);
mlxsw_sp_acl_fini(mlxsw_sp);
mlxsw_sp_span_fini(mlxsw_sp);

9
drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.c
View File

@ -56,6 +56,9 @@ static struct mlxsw_sp_counter_sub_pool mlxsw_sp_counter_sub_pools[] = {
[MLXSW_SP_COUNTER_SUB_POOL_FLOW] = {
.bank_count = 6,
},
[MLXSW_SP_COUNTER_SUB_POOL_RIF] = {
.bank_count = 2,
}
};
static int mlxsw_sp_counter_pool_validate(struct mlxsw_sp *mlxsw_sp)
@ -83,6 +86,12 @@ static int mlxsw_sp_counter_sub_pools_prepare(struct mlxsw_sp *mlxsw_sp)
return -EIO;
sub_pool->entry_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
COUNTER_SIZE_PACKETS_BYTES);
/* Prepare erif pool*/
sub_pool = &mlxsw_sp_counter_sub_pools[MLXSW_SP_COUNTER_SUB_POOL_RIF];
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, COUNTER_SIZE_ROUTER_BASIC))
return -EIO;
sub_pool->entry_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
COUNTER_SIZE_ROUTER_BASIC);
return 0;
}

1
drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.h
View File

@ -39,6 +39,7 @@
enum mlxsw_sp_counter_sub_pool_id {
MLXSW_SP_COUNTER_SUB_POOL_FLOW,
MLXSW_SP_COUNTER_SUB_POOL_RIF,
};
int mlxsw_sp_counter_alloc(struct mlxsw_sp *mlxsw_sp,

351
drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c Normal file
View File

@ -0,0 +1,351 @@
/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Arkadi Sharshevsky <arakdis@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <net/devlink.h>
#include "spectrum.h"
#include "spectrum_dpipe.h"
#include "spectrum_router.h"
enum mlxsw_sp_field_metadata_id {
MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT,
MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD,
MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP,
};
static struct devlink_dpipe_field mlxsw_sp_dpipe_fields_metadata[] = {
{ .name = "erif_port",
.id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT,
.bitwidth = 32,
.mapping_type = DEVLINK_DPIPE_FIELD_MAPPING_TYPE_IFINDEX,
},
{ .name = "l3_forward",
.id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD,
.bitwidth = 1,
},
{ .name = "l3_drop",
.id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP,
.bitwidth = 1,
},
};
enum mlxsw_sp_dpipe_header_id {
MLXSW_SP_DPIPE_HEADER_METADATA,
};
static struct devlink_dpipe_header mlxsw_sp_dpipe_header_metadata = {
.name = "mlxsw_meta",
.id = MLXSW_SP_DPIPE_HEADER_METADATA,
.fields = mlxsw_sp_dpipe_fields_metadata,
.fields_count = ARRAY_SIZE(mlxsw_sp_dpipe_fields_metadata),
};
static struct devlink_dpipe_header *mlxsw_dpipe_headers[] = {
&mlxsw_sp_dpipe_header_metadata,
};
static struct devlink_dpipe_headers mlxsw_sp_dpipe_headers = {
.headers = mlxsw_dpipe_headers,
.headers_count = ARRAY_SIZE(mlxsw_dpipe_headers),
};
static int mlxsw_sp_dpipe_table_erif_actions_dump(void *priv,
struct sk_buff *skb)
{
struct devlink_dpipe_action action = {0};
int err;
action.type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
action.header = &mlxsw_sp_dpipe_header_metadata;
action.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD;
err = devlink_dpipe_action_put(skb, &action);
if (err)
return err;
action.type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
action.header = &mlxsw_sp_dpipe_header_metadata;
action.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP;
return devlink_dpipe_action_put(skb, &action);
}
static int mlxsw_sp_dpipe_table_erif_matches_dump(void *priv,
struct sk_buff *skb)
{
struct devlink_dpipe_match match = {0};
match.type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
match.header = &mlxsw_sp_dpipe_header_metadata;
match.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT;
return devlink_dpipe_match_put(skb, &match);
}
static void mlxsw_sp_erif_entry_clear(struct devlink_dpipe_entry *entry)
{
unsigned int value_count, value_index;
struct devlink_dpipe_value *value;
value = entry->action_values;
value_count = entry->action_values_count;
for (value_index = 0; value_index < value_count; value_index++) {
kfree(value[value_index].value);
kfree(value[value_index].mask);
}
value = entry->match_values;
value_count = entry->match_values_count;
for (value_index = 0; value_index < value_count; value_index++) {
kfree(value[value_index].value);
kfree(value[value_index].mask);
}
}
static void
mlxsw_sp_erif_match_action_prepare(struct devlink_dpipe_match *match,
struct devlink_dpipe_action *action)
{
action->type = DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY;
action->header = &mlxsw_sp_dpipe_header_metadata;
action->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD;
match->type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
match->header = &mlxsw_sp_dpipe_header_metadata;
match->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ERIF_PORT;
}
static int mlxsw_sp_erif_entry_prepare(struct devlink_dpipe_entry *entry,
struct devlink_dpipe_value *match_value,
struct devlink_dpipe_match *match,
struct devlink_dpipe_value *action_value,
struct devlink_dpipe_action *action)
{
entry->match_values = match_value;
entry->match_values_count = 1;
entry->action_values = action_value;
entry->action_values_count = 1;
match_value->match = match;
match_value->value_size = sizeof(u32);
match_value->value = kmalloc(match_value->value_size, GFP_KERNEL);
if (!match_value->value)
return -ENOMEM;
action_value->action = action;
action_value->value_size = sizeof(u32);
action_value->value = kmalloc(action_value->value_size, GFP_KERNEL);
if (!action_value->value)
goto err_action_alloc;
return 0;
err_action_alloc:
kfree(match_value->value);
return -ENOMEM;
}
static int mlxsw_sp_erif_entry_get(struct mlxsw_sp *mlxsw_sp,
struct devlink_dpipe_entry *entry,
struct mlxsw_sp_rif *rif,
bool counters_enabled)
{
u32 *action_value;
u32 *rif_value;
u64 cnt;
int err;
/* Set Match RIF index */
rif_value = entry->match_values->value;
*rif_value = mlxsw_sp_rif_index(rif);
entry->match_values->mapping_value = mlxsw_sp_rif_dev_ifindex(rif);
entry->match_values->mapping_valid = true;
/* Set Action Forwarding */
action_value = entry->action_values->value;
*action_value = 1;
entry->counter_valid = false;
entry->counter = 0;
if (!counters_enabled)
return 0;
entry->index = mlxsw_sp_rif_index(rif);
err = mlxsw_sp_rif_counter_value_get(mlxsw_sp, rif,
MLXSW_SP_RIF_COUNTER_EGRESS,
&cnt);
if (!err) {
entry->counter = cnt;
entry->counter_valid = true;
}
return 0;
}
static int
mlxsw_sp_table_erif_entries_dump(void *priv, bool counters_enabled,
struct devlink_dpipe_dump_ctx *dump_ctx)
{
struct devlink_dpipe_value match_value = {{0}}, action_value = {{0}};
struct devlink_dpipe_action action = {0};
struct devlink_dpipe_match match = {0};
struct devlink_dpipe_entry entry = {0};
struct mlxsw_sp *mlxsw_sp = priv;
unsigned int rif_count;
int i, j;
int err;
mlxsw_sp_erif_match_action_prepare(&match, &action);
err = mlxsw_sp_erif_entry_prepare(&entry, &match_value, &match,
&action_value, &action);
if (err)
return err;
rif_count = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
rtnl_lock();
i = 0;
start_again:
err = devlink_dpipe_entry_ctx_prepare(dump_ctx);
if (err)
return err;
j = 0;
for (; i < rif_count; i++) {
if (!mlxsw_sp->rifs[i])
continue;
err = mlxsw_sp_erif_entry_get(mlxsw_sp, &entry,
mlxsw_sp->rifs[i],
counters_enabled);
if (err)
goto err_entry_get;
err = devlink_dpipe_entry_ctx_append(dump_ctx, &entry);
if (err) {
if (err == -EMSGSIZE) {
if (!j)
goto err_entry_append;
break;
}
goto err_entry_append;
}
j++;
}
devlink_dpipe_entry_ctx_close(dump_ctx);
if (i != rif_count)
goto start_again;
rtnl_unlock();
mlxsw_sp_erif_entry_clear(&entry);
return 0;
err_entry_append:
err_entry_get:
rtnl_unlock();
mlxsw_sp_erif_entry_clear(&entry);
return err;
}
static int mlxsw_sp_table_erif_counters_update(void *priv, bool enable)
{
struct mlxsw_sp *mlxsw_sp = priv;
int i;
rtnl_lock();
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) {
if (!mlxsw_sp->rifs[i])
continue;
if (enable)
mlxsw_sp_rif_counter_alloc(mlxsw_sp,
mlxsw_sp->rifs[i],
MLXSW_SP_RIF_COUNTER_EGRESS);
else
mlxsw_sp_rif_counter_free(mlxsw_sp,
mlxsw_sp->rifs[i],
MLXSW_SP_RIF_COUNTER_EGRESS);
}
rtnl_unlock();
return 0;
}
static struct devlink_dpipe_table_ops mlxsw_sp_erif_ops = {
.matches_dump = mlxsw_sp_dpipe_table_erif_matches_dump,
.actions_dump = mlxsw_sp_dpipe_table_erif_actions_dump,
.entries_dump = mlxsw_sp_table_erif_entries_dump,
.counters_set_update = mlxsw_sp_table_erif_counters_update,
};
static int mlxsw_sp_dpipe_erif_table_init(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
u64 table_size;
table_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
return devlink_dpipe_table_register(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ERIF,
&mlxsw_sp_erif_ops,
mlxsw_sp, table_size,
false);
}
static void mlxsw_sp_dpipe_erif_table_fini(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
devlink_dpipe_table_unregister(devlink, MLXSW_SP_DPIPE_TABLE_NAME_ERIF);
}
int mlxsw_sp_dpipe_init(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
int err;
err = devlink_dpipe_headers_register(devlink,
&mlxsw_sp_dpipe_headers);
if (err)
return err;
err = mlxsw_sp_dpipe_erif_table_init(mlxsw_sp);
if (err)
goto err_erif_register;
return 0;
err_erif_register:
devlink_dpipe_headers_unregister(priv_to_devlink(mlxsw_sp->core));
return err;
}
void mlxsw_sp_dpipe_fini(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
mlxsw_sp_dpipe_erif_table_fini(mlxsw_sp);
devlink_dpipe_headers_unregister(devlink);
}

43
drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.h Normal file
View File

@ -0,0 +1,43 @@
/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.h
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Arkadi Sharshevsky <arkadis@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MLXSW_PIPELINE_H_
#define _MLXSW_PIPELINE_H_
int mlxsw_sp_dpipe_init(struct mlxsw_sp *mlxsw_sp);
void mlxsw_sp_dpipe_fini(struct mlxsw_sp *mlxsw_sp);
#define MLXSW_SP_DPIPE_TABLE_NAME_ERIF "mlxsw_erif"
#endif /* _MLXSW_PIPELINE_H_*/

174
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -52,6 +52,9 @@
#include "spectrum.h"
#include "core.h"
#include "reg.h"
#include "spectrum_cnt.h"
#include "spectrum_dpipe.h"
#include "spectrum_router.h"
struct mlxsw_sp_rif {
struct list_head nexthop_list;
@ -62,8 +65,157 @@ struct mlxsw_sp_rif {
int mtu;
u16 rif_index;
u16 vr_id;
unsigned int counter_ingress;
bool counter_ingress_valid;
unsigned int counter_egress;
bool counter_egress_valid;
};
static unsigned int *
mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return &rif->counter_egress;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return &rif->counter_ingress;
}
return NULL;
}
static bool
mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return rif->counter_egress_valid;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return rif->counter_ingress_valid;
}
return false;
}
static void
mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
bool valid)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
rif->counter_egress_valid = valid;
break;
case MLXSW_SP_RIF_COUNTER_INGRESS:
rif->counter_ingress_valid = valid;
break;
}
}
static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
unsigned int counter_index, bool enable,
enum mlxsw_sp_rif_counter_dir dir)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
bool is_egress = false;
int err;
if (dir == MLXSW_SP_RIF_COUNTER_EGRESS)
is_egress = true;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable,
is_egress);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir, u64 *cnt)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
unsigned int *p_counter_index;
bool valid;
int err;
valid = mlxsw_sp_rif_counter_valid_get(rif, dir);
if (!valid)
return -EINVAL;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index,
MLXSW_REG_RICNT_OPCODE_NOP);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
if (err)
return err;
*cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl);
return 0;
}
static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
mlxsw_reg_ricnt_pack(ricnt_pl, counter_index,
MLXSW_REG_RICNT_OPCODE_CLEAR);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
}
int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
int err;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
p_counter_index);
if (err)
return err;
err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index);
if (err)
goto err_counter_clear;
err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, true, dir);
if (err)
goto err_counter_edit;
mlxsw_sp_rif_counter_valid_set(rif, dir, true);
return 0;
err_counter_edit:
err_counter_clear:
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
return err;
}
void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (WARN_ON(!p_counter_index))
return;
mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, false, dir);
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
mlxsw_sp_rif_counter_valid_set(rif, dir, false);
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev);
@ -2780,6 +2932,16 @@ mlxsw_sp_rif_alloc(u16 rif_index, u16 vr_id, struct net_device *l3_dev,
return rif;
}
u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif)
{
return rif->rif_index;
}
int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif)
{
return rif->dev->ifindex;
}
static struct mlxsw_sp_rif *
mlxsw_sp_vport_rif_sp_create(struct mlxsw_sp_port *mlxsw_sp_vport,
struct net_device *l3_dev)
@ -2822,6 +2984,15 @@ mlxsw_sp_vport_rif_sp_create(struct mlxsw_sp_port *mlxsw_sp_vport,
goto err_rif_alloc;
}
if (devlink_dpipe_table_counter_enabled(priv_to_devlink(mlxsw_sp->core),
MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) {
err = mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif,
MLXSW_SP_RIF_COUNTER_EGRESS);
if (err)
netdev_dbg(mlxsw_sp_vport->dev,
"Counter alloc Failed err=%d\n", err);
}
f->rif = rif;
mlxsw_sp->rifs[rif_index] = rif;
vr->rif_count++;
@ -2852,6 +3023,9 @@ static void mlxsw_sp_vport_rif_sp_destroy(struct mlxsw_sp_port *mlxsw_sp_vport,
mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif);
mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS);
mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_INGRESS);
vr->rif_count--;
mlxsw_sp->rifs[rif_index] = NULL;
f->rif = NULL;

58
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h Normal file
View File

@ -0,0 +1,58 @@
/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Arkadi Sharshevsky <arkadis@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MLXSW_ROUTER_H_
#define _MLXSW_ROUTER_H_
#include "spectrum.h"
enum mlxsw_sp_rif_counter_dir {
MLXSW_SP_RIF_COUNTER_INGRESS,
MLXSW_SP_RIF_COUNTER_EGRESS,
};
u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif);
int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif);
int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
u64 *cnt);
void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir);
int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir);
#endif /* _MLXSW_ROUTER_H_*/

259
include/net/devlink.h
View File

@ -25,6 +25,8 @@ struct devlink {
struct list_head list;
struct list_head port_list;
struct list_head sb_list;
struct list_head dpipe_table_list;
struct devlink_dpipe_headers *dpipe_headers;
const struct devlink_ops *ops;
struct device *dev;
possible_net_t _net;
@ -49,6 +51,178 @@ struct devlink_sb_pool_info {
enum devlink_sb_threshold_type threshold_type;
};
/**
* struct devlink_dpipe_field - dpipe field object
* @name: field name
* @id: index inside the headers field array
* @bitwidth: bitwidth
* @mapping_type: mapping type
*/
struct devlink_dpipe_field {
const char *name;
unsigned int id;
unsigned int bitwidth;
enum devlink_dpipe_field_mapping_type mapping_type;
};
/**
* struct devlink_dpipe_header - dpipe header object
* @name: header name
* @id: index, global/local detrmined by global bit
* @fields: fields
* @fields_count: number of fields
* @global: indicates if header is shared like most protocol header
* or driver specific
*/
struct devlink_dpipe_header {
const char *name;
unsigned int id;
struct devlink_dpipe_field *fields;
unsigned int fields_count;
bool global;
};
/**
* struct devlink_dpipe_match - represents match operation
* @type: type of match
* @header_index: header index (packets can have several headers of same
* type like in case of tunnels)
* @header: header
* @fieled_id: field index
*/
struct devlink_dpipe_match {
enum devlink_dpipe_match_type type;
unsigned int header_index;
struct devlink_dpipe_header *header;
unsigned int field_id;
};
/**
* struct devlink_dpipe_action - represents action operation
* @type: type of action
* @header_index: header index (packets can have several headers of same
* type like in case of tunnels)
* @header: header
* @fieled_id: field index
*/
struct devlink_dpipe_action {
enum devlink_dpipe_action_type type;
unsigned int header_index;
struct devlink_dpipe_header *header;
unsigned int field_id;
};
/**
* struct devlink_dpipe_value - represents value of match/action
* @action: action
* @match: match
* @mapping_value: in case the field has some mapping this value
* specified the mapping value
* @mapping_valid: specify if mapping value is valid
* @value_size: value size
* @value: value
* @mask: bit mask
*/
struct devlink_dpipe_value {
union {
struct devlink_dpipe_action *action;
struct devlink_dpipe_match *match;
};
unsigned int mapping_value;
bool mapping_valid;
unsigned int value_size;
void *value;
void *mask;
};
/**
* struct devlink_dpipe_entry - table entry object
* @index: index of the entry in the table
* @match_values: match values
* @matche_values_count: count of matches tuples
* @action_values: actions values
* @action_values_count: count of actions values
* @counter: value of counter
* @counter_valid: Specify if value is valid from hardware
*/
struct devlink_dpipe_entry {
u64 index;
struct devlink_dpipe_value *match_values;
unsigned int match_values_count;
struct devlink_dpipe_value *action_values;
unsigned int action_values_count;
u64 counter;
bool counter_valid;
};
/**
* struct devlink_dpipe_dump_ctx - context provided to driver in order
* to dump
* @info: info
* @cmd: devlink command
* @skb: skb
* @nest: top attribute
* @hdr: hdr
*/
struct devlink_dpipe_dump_ctx {
struct genl_info *info;
enum devlink_command cmd;
struct sk_buff *skb;
struct nlattr *nest;
void *hdr;
};
struct devlink_dpipe_table_ops;
/**
* struct devlink_dpipe_table - table object
* @priv: private
* @name: table name
* @size: maximum number of entries
* @counters_enabled: indicates if counters are active
* @counter_control_extern: indicates if counter control is in dpipe or
* external tool
* @table_ops: table operations
* @rcu: rcu
*/
struct devlink_dpipe_table {
void *priv;
struct list_head list;
const char *name;
u64 size;
bool counters_enabled;
bool counter_control_extern;
struct devlink_dpipe_table_ops *table_ops;
struct rcu_head rcu;
};
/**
* struct devlink_dpipe_table_ops - dpipe_table ops
* @actions_dump - dumps all tables actions
* @matches_dump - dumps all tables matches
* @entries_dump - dumps all active entries in the table
* @counters_set_update - when changing the counter status hardware sync
* maybe needed to allocate/free counter related
* resources
*/
struct devlink_dpipe_table_ops {
int (*actions_dump)(void *priv, struct sk_buff *skb);
int (*matches_dump)(void *priv, struct sk_buff *skb);
int (*entries_dump)(void *priv, bool counters_enabled,
struct devlink_dpipe_dump_ctx *dump_ctx);
int (*counters_set_update)(void *priv, bool enable);
};
/**
* struct devlink_dpipe_headers - dpipe headers
* @headers - header array can be shared (global bit) or driver specific
* @headers_count - count of headers
*/
struct devlink_dpipe_headers {
struct devlink_dpipe_header **headers;
unsigned int headers_count;
};
struct devlink_ops {
int (*port_type_set)(struct devlink_port *devlink_port,
enum devlink_port_type port_type);
@ -132,6 +306,26 @@ int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u16 egress_pools_count, u16 ingress_tc_count,
u16 egress_tc_count);
void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
int devlink_dpipe_table_register(struct devlink *devlink,
const char *table_name,
struct devlink_dpipe_table_ops *table_ops,
void *priv, u64 size,
bool counter_control_extern);
void devlink_dpipe_table_unregister(struct devlink *devlink,
const char *table_name);
int devlink_dpipe_headers_register(struct devlink *devlink,
struct devlink_dpipe_headers *dpipe_headers);
void devlink_dpipe_headers_unregister(struct devlink *devlink);
bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
const char *table_name);
int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx);
int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
struct devlink_dpipe_entry *entry);
int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx);
int devlink_dpipe_action_put(struct sk_buff *skb,
struct devlink_dpipe_action *action);
int devlink_dpipe_match_put(struct sk_buff *skb,
struct devlink_dpipe_match *match);
#else
@ -200,6 +394,71 @@ static inline void devlink_sb_unregister(struct devlink *devlink,
{
}
static inline int
devlink_dpipe_table_register(struct devlink *devlink,
const char *table_name,
struct devlink_dpipe_table_ops *table_ops,
void *priv, u64 size,
bool counter_control_extern)
{
return 0;
}
static inline void devlink_dpipe_table_unregister(struct devlink *devlink,
const char *table_name)
{
}
static inline int devlink_dpipe_headers_register(struct devlink *devlink,
struct devlink_dpipe_headers *
dpipe_headers)
{
return 0;
}
static inline void devlink_dpipe_headers_unregister(struct devlink *devlink)
{
}
static inline bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
const char *table_name)
{
return false;
}
static inline int
devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
{
return 0;
}
static inline int
devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
struct devlink_dpipe_entry *entry)
{
return 0;
}
static inline int
devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
{
return 0;
}
static inline int
devlink_dpipe_action_put(struct sk_buff *skb,
struct devlink_dpipe_action *action)
{
return 0;
}
static inline int
devlink_dpipe_match_put(struct sk_buff *skb,
struct devlink_dpipe_match *match)
{
return 0;
}
#endif
#endif /* _NET_DEVLINK_H_ */

67
include/uapi/linux/devlink.h
View File

@ -65,8 +65,12 @@ enum devlink_command {
#define DEVLINK_CMD_ESWITCH_MODE_SET /* obsolete, never use this! */ \
DEVLINK_CMD_ESWITCH_SET
/* add new commands above here */
DEVLINK_CMD_DPIPE_TABLE_GET,
DEVLINK_CMD_DPIPE_ENTRIES_GET,
DEVLINK_CMD_DPIPE_HEADERS_GET,
DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
};
@ -148,10 +152,71 @@ enum devlink_attr {
DEVLINK_ATTR_ESWITCH_MODE, /* u16 */
DEVLINK_ATTR_ESWITCH_INLINE_MODE, /* u8 */
DEVLINK_ATTR_DPIPE_TABLES, /* nested */
DEVLINK_ATTR_DPIPE_TABLE, /* nested */
DEVLINK_ATTR_DPIPE_TABLE_NAME, /* string */
DEVLINK_ATTR_DPIPE_TABLE_SIZE, /* u64 */
DEVLINK_ATTR_DPIPE_TABLE_MATCHES, /* nested */
DEVLINK_ATTR_DPIPE_TABLE_ACTIONS, /* nested */
DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED, /* u8 */
DEVLINK_ATTR_DPIPE_ENTRIES, /* nested */
DEVLINK_ATTR_DPIPE_ENTRY, /* nested */
DEVLINK_ATTR_DPIPE_ENTRY_INDEX, /* u64 */
DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES, /* nested */
DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES, /* nested */
DEVLINK_ATTR_DPIPE_ENTRY_COUNTER, /* u64 */
DEVLINK_ATTR_DPIPE_MATCH, /* nested */
DEVLINK_ATTR_DPIPE_MATCH_VALUE, /* nested */
DEVLINK_ATTR_DPIPE_MATCH_TYPE, /* u32 */
DEVLINK_ATTR_DPIPE_ACTION, /* nested */
DEVLINK_ATTR_DPIPE_ACTION_VALUE, /* nested */
DEVLINK_ATTR_DPIPE_ACTION_TYPE, /* u32 */
DEVLINK_ATTR_DPIPE_VALUE,
DEVLINK_ATTR_DPIPE_VALUE_MASK,
DEVLINK_ATTR_DPIPE_VALUE_MAPPING, /* u32 */
DEVLINK_ATTR_DPIPE_HEADERS, /* nested */
DEVLINK_ATTR_DPIPE_HEADER, /* nested */
DEVLINK_ATTR_DPIPE_HEADER_NAME, /* string */
DEVLINK_ATTR_DPIPE_HEADER_ID, /* u32 */
DEVLINK_ATTR_DPIPE_HEADER_FIELDS, /* nested */
DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, /* u8 */
DEVLINK_ATTR_DPIPE_HEADER_INDEX, /* u32 */
DEVLINK_ATTR_DPIPE_FIELD, /* nested */
DEVLINK_ATTR_DPIPE_FIELD_NAME, /* string */
DEVLINK_ATTR_DPIPE_FIELD_ID, /* u32 */
DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, /* u32 */
DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, /* u32 */
DEVLINK_ATTR_PAD,
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
DEVLINK_ATTR_MAX = __DEVLINK_ATTR_MAX - 1
};
/* Mapping between internal resource described by the field and system
* structure
*/
enum devlink_dpipe_field_mapping_type {
DEVLINK_DPIPE_FIELD_MAPPING_TYPE_NONE,
DEVLINK_DPIPE_FIELD_MAPPING_TYPE_IFINDEX,
};
/* Match type - specify the type of the match */
enum devlink_dpipe_match_type {
DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT,
};
/* Action type - specify the action type */
enum devlink_dpipe_action_type {
DEVLINK_DPIPE_ACTION_TYPE_FIELD_MODIFY,
};
#endif /* _UAPI_LINUX_DEVLINK_H_ */

838
net/core/devlink.c
View File

@ -1493,10 +1493,688 @@ static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
if (err)
return err;
}
return 0;
}
int devlink_dpipe_match_put(struct sk_buff *skb,
struct devlink_dpipe_match *match)
{
struct devlink_dpipe_header *header = match->header;
struct devlink_dpipe_field *field = &header->fields[match->field_id];
struct nlattr *match_attr;
match_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_MATCH);
if (!match_attr)
return -EMSGSIZE;
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
nla_nest_end(skb, match_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, match_attr);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
struct sk_buff *skb)
{
struct nlattr *matches_attr;
matches_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
if (!matches_attr)
return -EMSGSIZE;
if (table->table_ops->matches_dump(table->priv, skb))
goto nla_put_failure;
nla_nest_end(skb, matches_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, matches_attr);
return -EMSGSIZE;
}
int devlink_dpipe_action_put(struct sk_buff *skb,
struct devlink_dpipe_action *action)
{
struct devlink_dpipe_header *header = action->header;
struct devlink_dpipe_field *field = &header->fields[action->field_id];
struct nlattr *action_attr;
action_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ACTION);
if (!action_attr)
return -EMSGSIZE;
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
nla_nest_end(skb, action_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, action_attr);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
struct sk_buff *skb)
{
struct nlattr *actions_attr;
actions_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
if (!actions_attr)
return -EMSGSIZE;
if (table->table_ops->actions_dump(table->priv, skb))
goto nla_put_failure;
nla_nest_end(skb, actions_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, actions_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_table_put(struct sk_buff *skb,
struct devlink_dpipe_table *table)
{
struct nlattr *table_attr;
table_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE);
if (!table_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table->size,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
table->counters_enabled))
goto nla_put_failure;
if (devlink_dpipe_matches_put(table, skb))
goto nla_put_failure;
if (devlink_dpipe_actions_put(table, skb))
goto nla_put_failure;
nla_nest_end(skb, table_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, table_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
struct genl_info *info)
{
int err;
if (*pskb) {
err = genlmsg_reply(*pskb, info);
if (err)
return err;
}
*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!*pskb)
return -ENOMEM;
return 0;
}
static int devlink_dpipe_tables_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct list_head *dpipe_tables,
const char *table_name)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_dpipe_table *table;
struct nlattr *tables_attr;
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
bool incomplete;
void *hdr;
int i;
int err;
table = list_first_entry(dpipe_tables,
struct devlink_dpipe_table, list);
start_again:
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, NLM_F_MULTI, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(skb, devlink))
goto nla_put_failure;
tables_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLES);
if (!tables_attr)
goto nla_put_failure;
i = 0;
incomplete = false;
list_for_each_entry_from(table, dpipe_tables, list) {
if (!table_name) {
err = devlink_dpipe_table_put(skb, table);
if (err) {
if (!i)
goto err_table_put;
incomplete = true;
break;
}
} else {
if (!strcmp(table->name, table_name)) {
err = devlink_dpipe_table_put(skb, table);
if (err)
break;
}
}
i++;
}
nla_nest_end(skb, tables_attr);
genlmsg_end(skb, hdr);
if (incomplete)
goto start_again;
send_done:
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
goto err_skb_send_alloc;
goto send_done;
}
return genlmsg_reply(skb, info);
nla_put_failure:
err = -EMSGSIZE;
err_table_put:
err_skb_send_alloc:
genlmsg_cancel(skb, hdr);
nlmsg_free(skb);
return err;
}
static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const char *table_name = NULL;
if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
&devlink->dpipe_table_list,
table_name);
}
static int devlink_dpipe_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
value->value_size, value->value))
return -EMSGSIZE;
if (value->mask)
if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
value->value_size, value->mask))
return -EMSGSIZE;
if (value->mapping_valid)
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
value->mapping_value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_action_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (!value->action)
return -EINVAL;
if (devlink_dpipe_action_put(skb, value->action))
return -EMSGSIZE;
if (devlink_dpipe_value_put(skb, value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_action_values_put(struct sk_buff *skb,
struct devlink_dpipe_value *values,
unsigned int values_count)
{
struct nlattr *action_attr;
int i;
int err;
for (i = 0; i < values_count; i++) {
action_attr = nla_nest_start(skb,
DEVLINK_ATTR_DPIPE_ACTION_VALUE);
if (!action_attr)
return -EMSGSIZE;
err = devlink_dpipe_action_value_put(skb, &values[i]);
if (err)
goto err_action_value_put;
nla_nest_end(skb, action_attr);
}
return 0;
err_action_value_put:
nla_nest_cancel(skb, action_attr);
return err;
}
static int devlink_dpipe_match_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (!value->match)
return -EINVAL;
if (devlink_dpipe_match_put(skb, value->match))
return -EMSGSIZE;
if (devlink_dpipe_value_put(skb, value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_match_values_put(struct sk_buff *skb,
struct devlink_dpipe_value *values,
unsigned int values_count)
{
struct nlattr *match_attr;
int i;
int err;
for (i = 0; i < values_count; i++) {
match_attr = nla_nest_start(skb,
DEVLINK_ATTR_DPIPE_MATCH_VALUE);
if (!match_attr)
return -EMSGSIZE;
err = devlink_dpipe_match_value_put(skb, &values[i]);
if (err)
goto err_match_value_put;
nla_nest_end(skb, match_attr);
}
return 0;
err_match_value_put:
nla_nest_cancel(skb, match_attr);
return err;
}
static int devlink_dpipe_entry_put(struct sk_buff *skb,
struct devlink_dpipe_entry *entry)
{
struct nlattr *entry_attr, *matches_attr, *actions_attr;
int err;
entry_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ENTRY);
if (!entry_attr)
return -EMSGSIZE;
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (entry->counter_valid)
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
entry->counter, DEVLINK_ATTR_PAD))
goto nla_put_failure;
matches_attr = nla_nest_start(skb,
DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
if (!matches_attr)
goto nla_put_failure;
err = devlink_dpipe_match_values_put(skb, entry->match_values,
entry->match_values_count);
if (err) {
nla_nest_cancel(skb, matches_attr);
goto err_match_values_put;
}
nla_nest_end(skb, matches_attr);
actions_attr = nla_nest_start(skb,
DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
if (!actions_attr)
goto nla_put_failure;
err = devlink_dpipe_action_values_put(skb, entry->action_values,
entry->action_values_count);
if (err) {
nla_nest_cancel(skb, actions_attr);
goto err_action_values_put;
}
nla_nest_end(skb, actions_attr);
nla_nest_end(skb, entry_attr);
return 0;
nla_put_failure:
err = -EMSGSIZE;
err_match_values_put:
err_action_values_put:
nla_nest_cancel(skb, entry_attr);
return err;
}
static struct devlink_dpipe_table *
devlink_dpipe_table_find(struct list_head *dpipe_tables,
const char *table_name)
{
struct devlink_dpipe_table *table;
list_for_each_entry_rcu(table, dpipe_tables, list) {
if (!strcmp(table->name, table_name))
return table;
}
return NULL;
}
int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
{
struct devlink *devlink;
int err;
err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
dump_ctx->info);
if (err)
return err;
dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
dump_ctx->info->snd_portid,
dump_ctx->info->snd_seq,
&devlink_nl_family, NLM_F_MULTI,
dump_ctx->cmd);
if (!dump_ctx->hdr)
goto nla_put_failure;
devlink = dump_ctx->info->user_ptr[0];
if (devlink_nl_put_handle(dump_ctx->skb, devlink))
goto nla_put_failure;
dump_ctx->nest = nla_nest_start(dump_ctx->skb,
DEVLINK_ATTR_DPIPE_ENTRIES);
if (!dump_ctx->nest)
goto nla_put_failure;
return 0;
nla_put_failure:
genlmsg_cancel(dump_ctx->skb, dump_ctx->hdr);
nlmsg_free(dump_ctx->skb);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
struct devlink_dpipe_entry *entry)
{
return devlink_dpipe_entry_put(dump_ctx->skb, entry);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
{
nla_nest_end(dump_ctx->skb, dump_ctx->nest);
genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
static int devlink_dpipe_entries_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct devlink_dpipe_table *table)
{
struct devlink_dpipe_dump_ctx dump_ctx;
struct nlmsghdr *nlh;
int err;
dump_ctx.skb = NULL;
dump_ctx.cmd = cmd;
dump_ctx.info = info;
err = table->table_ops->entries_dump(table->priv,
table->counters_enabled,
&dump_ctx);
if (err)
goto err_entries_dump;
send_done:
nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
if (err)
goto err_skb_send_alloc;
goto send_done;
}
return genlmsg_reply(dump_ctx.skb, info);
err_entries_dump:
err_skb_send_alloc:
genlmsg_cancel(dump_ctx.skb, dump_ctx.hdr);
nlmsg_free(dump_ctx.skb);
return err;
}
static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_dpipe_table *table;
const char *table_name;
if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
return -EINVAL;
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
return -EINVAL;
if (!table->table_ops->entries_dump)
return -EINVAL;
return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
0, table);
}
static int devlink_dpipe_fields_put(struct sk_buff *skb,
const struct devlink_dpipe_header *header)
{
struct devlink_dpipe_field *field;
struct nlattr *field_attr;
int i;
for (i = 0; i < header->fields_count; i++) {
field = &header->fields[i];
field_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_FIELD);
if (!field_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
goto nla_put_failure;
nla_nest_end(skb, field_attr);
}
return 0;
nla_put_failure:
nla_nest_cancel(skb, field_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_header_put(struct sk_buff *skb,
struct devlink_dpipe_header *header)
{
struct nlattr *fields_attr, *header_attr;
int err;
header_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER);
if (!header)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
fields_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
if (!fields_attr)
goto nla_put_failure;
err = devlink_dpipe_fields_put(skb, header);
if (err) {
nla_nest_cancel(skb, fields_attr);
goto nla_put_failure;
}
nla_nest_end(skb, fields_attr);
nla_nest_end(skb, header_attr);
return 0;
nla_put_failure:
err = -EMSGSIZE;
nla_nest_cancel(skb, header_attr);
return err;
}
static int devlink_dpipe_headers_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct devlink_dpipe_headers *
dpipe_headers)
{
struct devlink *devlink = info->user_ptr[0];
struct nlattr *headers_attr;
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
void *hdr;
int i, j;
int err;
i = 0;
start_again:
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, NLM_F_MULTI, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(skb, devlink))
goto nla_put_failure;
headers_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADERS);
if (!headers_attr)
goto nla_put_failure;
j = 0;
for (; i < dpipe_headers->headers_count; i++) {
err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
if (err) {
if (!j)
goto err_table_put;
break;
}
j++;
}
nla_nest_end(skb, headers_attr);
genlmsg_end(skb, hdr);
if (i != dpipe_headers->headers_count)
goto start_again;
send_done:
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
goto err_skb_send_alloc;
goto send_done;
}
return genlmsg_reply(skb, info);
nla_put_failure:
err = -EMSGSIZE;
err_table_put:
err_skb_send_alloc:
genlmsg_cancel(skb, hdr);
nlmsg_free(skb);
return err;
}
static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
if (!devlink->dpipe_headers)
return -EOPNOTSUPP;
return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
0, devlink->dpipe_headers);
}
static int devlink_dpipe_table_counters_set(struct devlink *devlink,
const char *table_name,
bool enable)
{
struct devlink_dpipe_table *table;
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
return -EINVAL;
if (table->counter_control_extern)
return -EOPNOTSUPP;
if (!(table->counters_enabled ^ enable))
return 0;
table->counters_enabled = enable;
if (table->table_ops->counters_set_update)
table->table_ops->counters_set_update(table->priv, enable);
return 0;
}
static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const char *table_name;
bool counters_enable;
if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
return -EINVAL;
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
return devlink_dpipe_table_counters_set(devlink, table_name,
counters_enable);
}
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@ -1512,6 +2190,8 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
[DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
[DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
};
static const struct genl_ops devlink_nl_ops[] = {
@ -1644,6 +2324,34 @@ static const struct genl_ops devlink_nl_ops[] = {
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
.doit = devlink_nl_cmd_dpipe_table_get,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
.doit = devlink_nl_cmd_dpipe_entries_get,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
.doit = devlink_nl_cmd_dpipe_headers_get,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
.doit = devlink_nl_cmd_dpipe_table_counters_set,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
};
static struct genl_family devlink_nl_family __ro_after_init = {
@ -1680,6 +2388,7 @@ struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
devlink_net_set(devlink, &init_net);
INIT_LIST_HEAD(&devlink->port_list);
INIT_LIST_HEAD(&devlink->sb_list);
INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
return devlink;
}
EXPORT_SYMBOL_GPL(devlink_alloc);
@ -1880,6 +2589,133 @@ void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
}
EXPORT_SYMBOL_GPL(devlink_sb_unregister);
/**
* devlink_dpipe_headers_register - register dpipe headers
*
* @devlink: devlink
* @dpipe_headers: dpipe header array
*
* Register the headers supported by hardware.
*/
int devlink_dpipe_headers_register(struct devlink *devlink,
struct devlink_dpipe_headers *dpipe_headers)
{
mutex_lock(&devlink_mutex);
devlink->dpipe_headers = dpipe_headers;
mutex_unlock(&devlink_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
/**
* devlink_dpipe_headers_unregister - unregister dpipe headers
*
* @devlink: devlink
*
* Unregister the headers supported by hardware.
*/
void devlink_dpipe_headers_unregister(struct devlink *devlink)
{
mutex_lock(&devlink_mutex);
devlink->dpipe_headers = NULL;
mutex_unlock(&devlink_mutex);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
/**
* devlink_dpipe_table_counter_enabled - check if counter allocation
* required
* @devlink: devlink
* @table_name: tables name
*
* Used by driver to check if counter allocation is required.
* After counter allocation is turned on the table entries
* are updated to include counter statistics.
*
* After that point on the driver must respect the counter
* state so that each entry added to the table is added
* with a counter.
*/
bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
const char *table_name)
{
struct devlink_dpipe_table *table;
bool enabled;
rcu_read_lock();
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
enabled = false;
if (table)
enabled = table->counters_enabled;
rcu_read_unlock();
return enabled;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
/**
* devlink_dpipe_table_register - register dpipe table
*
* @devlink: devlink
* @table_name: table name
* @table_ops: table ops
* @priv: priv
* @size: size
* @counter_control_extern: external control for counters
*/
int devlink_dpipe_table_register(struct devlink *devlink,
const char *table_name,
struct devlink_dpipe_table_ops *table_ops,
void *priv, u64 size,
bool counter_control_extern)
{
struct devlink_dpipe_table *table;
if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
return -EEXIST;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
table->name = table_name;
table->table_ops = table_ops;
table->priv = priv;
table->size = size;
table->counter_control_extern = counter_control_extern;
mutex_lock(&devlink_mutex);
list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
mutex_unlock(&devlink_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
/**
* devlink_dpipe_table_unregister - unregister dpipe table
*
* @devlink: devlink
* @table_name: table name
*/
void devlink_dpipe_table_unregister(struct devlink *devlink,
const char *table_name)
{
struct devlink_dpipe_table *table;
mutex_lock(&devlink_mutex);
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
goto unlock;
list_del_rcu(&table->list);
mutex_unlock(&devlink_mutex);
kfree_rcu(table, rcu);
return;
unlock:
mutex_unlock(&devlink_mutex);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
static int __init devlink_module_init(void)
{
return genl_register_family(&devlink_nl_family);