mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 10:40:15 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

net/ethtool: add netlink interface for the PLCA RS

Browse source 
Add support for configuring the PLCA Reconciliation Sublayer on
multi-drop PHYs that support IEEE802.3cg-2019 Clause 148 (e.g.,
10BASE-T1S). This patch adds the appropriate netlink interface
to ethtool.

Signed-off-by: Piergiorgio Beruto <piergiorgio.beruto@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Piergiorgio Beruto 2023-01-09 17:59:39 +01:00 committed by David S. Miller
parent a6f536063b
commit 8580e16c28
9 changed files with 551 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

138
Documentation/networking/ethtool-netlink.rst
View file

@ -1716,6 +1716,141 @@ being used. Current supported options are toeplitz, xor or crc32.
ETHTOOL_A_RSS_INDIR attribute returns RSS indrection table where each byte
indicates queue number.
PLCA_GET_CFG
============
Gets the IEEE 802.3cg-2019 Clause 148 Physical Layer Collision Avoidance
(PLCA) Reconciliation Sublayer (RS) attributes.
Request contents:
===================================== ====== ==========================
``ETHTOOL_A_PLCA_HEADER`` nested request header
===================================== ====== ==========================
Kernel response contents:
====================================== ====== =============================
``ETHTOOL_A_PLCA_HEADER`` nested reply header
``ETHTOOL_A_PLCA_VERSION`` u16 Supported PLCA management
interface standard/version
``ETHTOOL_A_PLCA_ENABLED`` u8 PLCA Admin State
``ETHTOOL_A_PLCA_NODE_ID`` u32 PLCA unique local node ID
``ETHTOOL_A_PLCA_NODE_CNT`` u32 Number of PLCA nodes on the
network, including the
coordinator
``ETHTOOL_A_PLCA_TO_TMR`` u32 Transmit Opportunity Timer
value in bit-times (BT)
``ETHTOOL_A_PLCA_BURST_CNT`` u32 Number of additional packets
the node is allowed to send
within a single TO
``ETHTOOL_A_PLCA_BURST_TMR`` u32 Time to wait for the MAC to
transmit a new frame before
terminating the burst
====================================== ====== =============================
When set, the optional ``ETHTOOL_A_PLCA_VERSION`` attribute indicates which
standard and version the PLCA management interface complies to. When not set,
the interface is vendor-specific and (possibly) supplied by the driver.
The OPEN Alliance SIG specifies a standard register map for 10BASE-T1S PHYs
embedding the PLCA Reconcialiation Sublayer. See "10BASE-T1S PLCA Management
Registers" at https://www.opensig.org/about/specifications/.
When set, the optional ``ETHTOOL_A_PLCA_ENABLED`` attribute indicates the
administrative state of the PLCA RS. When not set, the node operates in "plain"
CSMA/CD mode. This option is corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.1
aPLCAAdminState / 30.16.1.2.1 acPLCAAdminControl.
When set, the optional ``ETHTOOL_A_PLCA_NODE_ID`` attribute indicates the
configured local node ID of the PHY. This ID determines which transmit
opportunity (TO) is reserved for the node to transmit into. This option is
corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.4 aPLCALocalNodeID. The valid
range for this attribute is [0 .. 255] where 255 means "not configured".
When set, the optional ``ETHTOOL_A_PLCA_NODE_CNT`` attribute indicates the
configured maximum number of PLCA nodes on the mixing-segment. This number
determines the total number of transmit opportunities generated during a
PLCA cycle. This attribute is relevant only for the PLCA coordinator, which is
the node with aPLCALocalNodeID set to 0. Follower nodes ignore this setting.
This option is corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.3
aPLCANodeCount. The valid range for this attribute is [1 .. 255].
When set, the optional ``ETHTOOL_A_PLCA_TO_TMR`` attribute indicates the
configured value of the transmit opportunity timer in bit-times. This value
must be set equal across all nodes sharing the medium for PLCA to work
correctly. This option is corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.5
aPLCATransmitOpportunityTimer. The valid range for this attribute is
[0 .. 255].
When set, the optional ``ETHTOOL_A_PLCA_BURST_CNT`` attribute indicates the
configured number of extra packets that the node is allowed to send during a
single transmit opportunity. By default, this attribute is 0, meaning that
the node can only send a sigle frame per TO. When greater than 0, the PLCA RS
keeps the TO after any transmission, waiting for the MAC to send a new frame
for up to aPLCABurstTimer BTs. This can only happen a number of times per PLCA
cycle up to the value of this parameter. After that, the burst is over and the
normal counting of TOs resumes. This option is corresponding to
``IEEE 802.3cg-2019`` 30.16.1.1.6 aPLCAMaxBurstCount. The valid range for this
attribute is [0 .. 255].
When set, the optional ``ETHTOOL_A_PLCA_BURST_TMR`` attribute indicates how
many bit-times the PLCA RS waits for the MAC to initiate a new transmission
when aPLCAMaxBurstCount is greater than 0. If the MAC fails to send a new
frame within this time, the burst ends and the counting of TOs resumes.
Otherwise, the new frame is sent as part of the current burst. This option
is corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.7 aPLCABurstTimer. The
valid range for this attribute is [0 .. 255]. Although, the value should be
set greater than the Inter-Frame-Gap (IFG) time of the MAC (plus some margin)
for PLCA burst mode to work as intended.
PLCA_SET_CFG
============
Sets PLCA RS parameters.
Request contents:
====================================== ====== =============================
``ETHTOOL_A_PLCA_HEADER`` nested request header
``ETHTOOL_A_PLCA_ENABLED`` u8 PLCA Admin State
``ETHTOOL_A_PLCA_NODE_ID`` u8 PLCA unique local node ID
``ETHTOOL_A_PLCA_NODE_CNT`` u8 Number of PLCA nodes on the
netkork, including the
coordinator
``ETHTOOL_A_PLCA_TO_TMR`` u8 Transmit Opportunity Timer
value in bit-times (BT)
``ETHTOOL_A_PLCA_BURST_CNT`` u8 Number of additional packets
the node is allowed to send
within a single TO
``ETHTOOL_A_PLCA_BURST_TMR`` u8 Time to wait for the MAC to
transmit a new frame before
terminating the burst
====================================== ====== =============================
For a description of each attribute, see ``PLCA_GET_CFG``.
PLCA_GET_STATUS
===============
Gets PLCA RS status information.
Request contents:
===================================== ====== ==========================
``ETHTOOL_A_PLCA_HEADER`` nested request header
===================================== ====== ==========================
Kernel response contents:
====================================== ====== =============================
``ETHTOOL_A_PLCA_HEADER`` nested reply header
``ETHTOOL_A_PLCA_STATUS`` u8 PLCA RS operational status
====================================== ====== =============================
When set, the ``ETHTOOL_A_PLCA_STATUS`` attribute indicates whether the node is
detecting the presence of the BEACON on the network. This flag is
corresponding to ``IEEE 802.3cg-2019`` 30.16.1.1.2 aPLCAStatus.
Request translation
===================
@ -1817,4 +1952,7 @@ are netlink only.
n/a ``ETHTOOL_MSG_PHC_VCLOCKS_GET``
n/a ``ETHTOOL_MSG_MODULE_GET``
n/a ``ETHTOOL_MSG_MODULE_SET``
n/a ``ETHTOOL_MSG_PLCA_GET_CFG``
n/a ``ETHTOOL_MSG_PLCA_SET_CFG``
n/a ``ETHTOOL_MSG_PLCA_GET_STATUS``
=================================== =====================================

6
MAINTAINERS
View file

@ -16616,6 +16616,12 @@ S: Maintained
F: Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml
F: drivers/iio/chemical/pms7003.c
PLCA RECONCILIATION SUBLAYER (IEEE802.3 Clause 148)
M: Piergiorgio Beruto <piergiorgio.beruto@gmail.com>
L: netdev@vger.kernel.org
S: Maintained
F: net/ethtool/plca.c
PLDMFW LIBRARY
M: Jacob Keller <jacob.e.keller@intel.com>
S: Maintained

12
include/linux/ethtool.h
View file

@ -802,12 +802,17 @@ int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
struct phy_device;
struct phy_tdr_config;
struct phy_plca_cfg;
struct phy_plca_status;
/**
* struct ethtool_phy_ops - Optional PHY device options
* @get_sset_count: Get number of strings that @get_strings will write.
* @get_strings: Return a set of strings that describe the requested objects
* @get_stats: Return extended statistics about the PHY device.
* @get_plca_cfg: Return PLCA configuration.
* @set_plca_cfg: Set PLCA configuration.
* @get_plca_status: Get PLCA configuration.
* @start_cable_test: Start a cable test
* @start_cable_test_tdr: Start a Time Domain Reflectometry cable test
*
@ -819,6 +824,13 @@ struct ethtool_phy_ops {
int (*get_strings)(struct phy_device *dev, u8 *data);
int (*get_stats)(struct phy_device *dev,
struct ethtool_stats *stats, u64 *data);
int (*get_plca_cfg)(struct phy_device *dev,
struct phy_plca_cfg *plca_cfg);
int (*set_plca_cfg)(struct phy_device *dev,
const struct phy_plca_cfg *plca_cfg,
struct netlink_ext_ack *extack);
int (*get_plca_status)(struct phy_device *dev,
struct phy_plca_status *plca_st);
int (*start_cable_test)(struct phy_device *phydev,
struct netlink_ext_ack *extack);
int (*start_cable_test_tdr)(struct phy_device *phydev,

57
include/linux/phy.h
View file

@ -773,6 +773,63 @@ struct phy_tdr_config {
};
#define PHY_PAIR_ALL -1
/**
* struct phy_plca_cfg - Configuration of the PLCA (Physical Layer Collision
* Avoidance) Reconciliation Sublayer.
*
* @version: read-only PLCA register map version. -1 = not available. Ignored
* when setting the configuration. Format is the same as reported by the PLCA
* IDVER register (31.CA00). -1 = not available.
* @enabled: PLCA configured mode (enabled/disabled). -1 = not available / don't
* set. 0 = disabled, anything else = enabled.
* @node_id: the PLCA local node identifier. -1 = not available / don't set.
* Allowed values [0 .. 254]. 255 = node disabled.
* @node_cnt: the PLCA node count (maximum number of nodes having a TO). Only
* meaningful for the coordinator (node_id = 0). -1 = not available / don't
* set. Allowed values [1 .. 255].
* @to_tmr: The value of the PLCA to_timer in bit-times, which determines the
* PLCA transmit opportunity window opening. See IEEE802.3 Clause 148 for
* more details. The to_timer shall be set equal over all nodes.
* -1 = not available / don't set. Allowed values [0 .. 255].
* @burst_cnt: controls how many additional frames a node is allowed to send in
* single transmit opportunity (TO). The default value of 0 means that the
* node is allowed exactly one frame per TO. A value of 1 allows two frames
* per TO, and so on. -1 = not available / don't set.
* Allowed values [0 .. 255].
* @burst_tmr: controls how many bit times to wait for the MAC to send a new
* frame before interrupting the burst. This value should be set to a value
* greater than the MAC inter-packet gap (which is typically 96 bits).
* -1 = not available / don't set. Allowed values [0 .. 255].
*
* A structure containing configuration parameters for setting/getting the PLCA
* RS configuration. The driver does not need to implement all the parameters,
* but should report what is actually used.
*/
struct phy_plca_cfg {
int version;
int enabled;
int node_id;
int node_cnt;
int to_tmr;
int burst_cnt;
int burst_tmr;
};
/**
* struct phy_plca_status - Status of the PLCA (Physical Layer Collision
* Avoidance) Reconciliation Sublayer.
*
* @pst: The PLCA status as reported by the PST bit in the PLCA STATUS
* register(31.CA03), indicating BEACON activity.
*
* A structure containing status information of the PLCA RS configuration.
* The driver does not need to implement all the parameters, but should report
* what is actually used.
*/
struct phy_plca_status {
bool pst;
};
/**
* struct phy_driver - Driver structure for a particular PHY type
*

25
include/uapi/linux/ethtool_netlink.h
View file

@ -52,6 +52,9 @@ enum {
ETHTOOL_MSG_PSE_GET,
ETHTOOL_MSG_PSE_SET,
ETHTOOL_MSG_RSS_GET,
ETHTOOL_MSG_PLCA_GET_CFG,
ETHTOOL_MSG_PLCA_SET_CFG,
ETHTOOL_MSG_PLCA_GET_STATUS,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@ -99,6 +102,9 @@ enum {
ETHTOOL_MSG_MODULE_NTF,
ETHTOOL_MSG_PSE_GET_REPLY,
ETHTOOL_MSG_RSS_GET_REPLY,
ETHTOOL_MSG_PLCA_GET_CFG_REPLY,
ETHTOOL_MSG_PLCA_GET_STATUS_REPLY,
ETHTOOL_MSG_PLCA_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@ -894,6 +900,25 @@ enum {
ETHTOOL_A_RSS_MAX = (__ETHTOOL_A_RSS_CNT - 1),
};
/* PLCA */
enum {
ETHTOOL_A_PLCA_UNSPEC,
ETHTOOL_A_PLCA_HEADER, /* nest - _A_HEADER_* */
ETHTOOL_A_PLCA_VERSION, /* u16 */
ETHTOOL_A_PLCA_ENABLED, /* u8 */
ETHTOOL_A_PLCA_STATUS, /* u8 */
ETHTOOL_A_PLCA_NODE_CNT, /* u32 */
ETHTOOL_A_PLCA_NODE_ID, /* u32 */
ETHTOOL_A_PLCA_TO_TMR, /* u32 */
ETHTOOL_A_PLCA_BURST_CNT, /* u32 */
ETHTOOL_A_PLCA_BURST_TMR, /* u32 */
/* add new constants above here */
__ETHTOOL_A_PLCA_CNT,
ETHTOOL_A_PLCA_MAX = (__ETHTOOL_A_PLCA_CNT - 1)
};
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1

2
net/ethtool/Makefile
View file

@ -8,4 +8,4 @@ ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o rss.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \
tunnels.o fec.o eeprom.o stats.o phc_vclocks.o module.o \
pse-pd.o
pse-pd.o plca.o

29
net/ethtool/netlink.c
View file

@ -288,6 +288,8 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_MODULE_GET] = &ethnl_module_request_ops,
[ETHTOOL_MSG_PSE_GET] = &ethnl_pse_request_ops,
[ETHTOOL_MSG_RSS_GET] = &ethnl_rss_request_ops,
[ETHTOOL_MSG_PLCA_GET_CFG] = &ethnl_plca_cfg_request_ops,
[ETHTOOL_MSG_PLCA_GET_STATUS] = &ethnl_plca_status_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@ -603,6 +605,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_EEE_NTF] = &ethnl_eee_request_ops,
[ETHTOOL_MSG_FEC_NTF] = &ethnl_fec_request_ops,
[ETHTOOL_MSG_MODULE_NTF] = &ethnl_module_request_ops,
[ETHTOOL_MSG_PLCA_NTF] = &ethnl_plca_cfg_request_ops,
};
/* default notification handler */
@ -696,6 +699,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify,
};
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
@ -1047,6 +1051,31 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_rss_get_policy,
.maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PLCA_GET_CFG,
.doit = ethnl_default_doit,
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
.policy = ethnl_plca_get_cfg_policy,
.maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PLCA_SET_CFG,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_plca_cfg,
.policy = ethnl_plca_set_cfg_policy,
.maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
.doit = ethnl_default_doit,
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
.policy = ethnl_plca_get_status_policy,
.maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
},
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {

6
net/ethtool/netlink.h
View file

@ -347,6 +347,8 @@ extern const struct ethnl_request_ops ethnl_phc_vclocks_request_ops;
extern const struct ethnl_request_ops ethnl_module_request_ops;
extern const struct ethnl_request_ops ethnl_pse_request_ops;
extern const struct ethnl_request_ops ethnl_rss_request_ops;
extern const struct ethnl_request_ops ethnl_plca_cfg_request_ops;
extern const struct ethnl_request_ops ethnl_plca_status_request_ops;
extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
@ -388,6 +390,9 @@ extern const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MO
extern const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1];
extern const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1];
extern const struct nla_policy ethnl_rss_get_policy[ETHTOOL_A_RSS_CONTEXT + 1];
extern const struct nla_policy ethnl_plca_get_cfg_policy[ETHTOOL_A_PLCA_HEADER + 1];
extern const struct nla_policy ethnl_plca_set_cfg_policy[ETHTOOL_A_PLCA_MAX + 1];
extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADER + 1];
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
@ -408,6 +413,7 @@ int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_module(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_pse(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_plca_cfg(struct sk_buff *skb, struct genl_info *info);
extern const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN];
extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN];

277
net/ethtool/plca.c Normal file
View file

@ -0,0 +1,277 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/phy.h>
#include <linux/ethtool_netlink.h>
#include "netlink.h"
#include "common.h"
struct plca_req_info {
struct ethnl_req_info base;
};
struct plca_reply_data {
struct ethnl_reply_data base;
struct phy_plca_cfg plca_cfg;
struct phy_plca_status plca_st;
};
// Helpers ------------------------------------------------------------------ //
#define PLCA_REPDATA(__reply_base) \
container_of(__reply_base, struct plca_reply_data, base)
static void plca_update_sint(int *dst, const struct nlattr *attr,
bool *mod)
{
if (!attr)
return;
*dst = nla_get_u32(attr);
*mod = true;
}
// PLCA get configuration message ------------------------------------------- //
const struct nla_policy ethnl_plca_get_cfg_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct plca_reply_data *data = PLCA_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
const struct ethtool_phy_ops *ops;
int ret;
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out;
}
// note: rtnl_lock is held already by ethnl_default_doit
ops = ethtool_phy_ops;
if (!ops || !ops->get_plca_cfg) {
ret = -EOPNOTSUPP;
goto out;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out;
memset(&data->plca_cfg, 0xff,
sizeof_field(struct plca_reply_data, plca_cfg));
ret = ops->get_plca_cfg(dev->phydev, &data->plca_cfg);
ethnl_ops_complete(dev);
out:
return ret;
}
static int plca_get_cfg_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
return nla_total_size(sizeof(u16)) + /* _VERSION */
nla_total_size(sizeof(u8)) + /* _ENABLED */
nla_total_size(sizeof(u32)) + /* _NODE_CNT */
nla_total_size(sizeof(u32)) + /* _NODE_ID */
nla_total_size(sizeof(u32)) + /* _TO_TIMER */
nla_total_size(sizeof(u32)) + /* _BURST_COUNT */
nla_total_size(sizeof(u32)); /* _BURST_TIMER */
}
static int plca_get_cfg_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
const struct phy_plca_cfg *plca = &data->plca_cfg;
if ((plca->version >= 0 &&
nla_put_u16(skb, ETHTOOL_A_PLCA_VERSION, plca->version)) ||
(plca->enabled >= 0 &&
nla_put_u8(skb, ETHTOOL_A_PLCA_ENABLED, !!plca->enabled)) ||
(plca->node_id >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_ID, plca->node_id)) ||
(plca->node_cnt >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_CNT, plca->node_cnt)) ||
(plca->to_tmr >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_TO_TMR, plca->to_tmr)) ||
(plca->burst_cnt >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_CNT, plca->burst_cnt)) ||
(plca->burst_tmr >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_TMR, plca->burst_tmr)))
return -EMSGSIZE;
return 0;
};
const struct ethnl_request_ops ethnl_plca_cfg_request_ops = {
.request_cmd = ETHTOOL_MSG_PLCA_GET_CFG,
.reply_cmd = ETHTOOL_MSG_PLCA_GET_CFG_REPLY,
.hdr_attr = ETHTOOL_A_PLCA_HEADER,
.req_info_size = sizeof(struct plca_req_info),
.reply_data_size = sizeof(struct plca_reply_data),
.prepare_data = plca_get_cfg_prepare_data,
.reply_size = plca_get_cfg_reply_size,
.fill_reply = plca_get_cfg_fill_reply,
};
// PLCA set configuration message ------------------------------------------- //
const struct nla_policy ethnl_plca_set_cfg_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_PLCA_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
[ETHTOOL_A_PLCA_NODE_ID] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_NODE_CNT] = NLA_POLICY_RANGE(NLA_U32, 1, 255),
[ETHTOOL_A_PLCA_TO_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_BURST_CNT] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_BURST_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
};
int ethnl_set_plca_cfg(struct sk_buff *skb, struct genl_info *info)
{
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
const struct ethtool_phy_ops *ops;
struct phy_plca_cfg plca_cfg;
struct net_device *dev;
bool mod = false;
int ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_PLCA_HEADER],
genl_info_net(info), info->extack,
true);
if (!ret)
return ret;
dev = req_info.dev;
rtnl_lock();
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ops = ethtool_phy_ops;
if (!ops || !ops->set_plca_cfg) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out_rtnl;
memset(&plca_cfg, 0xff, sizeof(plca_cfg));
plca_update_sint(&plca_cfg.enabled, tb[ETHTOOL_A_PLCA_ENABLED], &mod);
plca_update_sint(&plca_cfg.node_id, tb[ETHTOOL_A_PLCA_NODE_ID], &mod);
plca_update_sint(&plca_cfg.node_cnt, tb[ETHTOOL_A_PLCA_NODE_CNT], &mod);
plca_update_sint(&plca_cfg.to_tmr, tb[ETHTOOL_A_PLCA_TO_TMR], &mod);
plca_update_sint(&plca_cfg.burst_cnt, tb[ETHTOOL_A_PLCA_BURST_CNT],
&mod);
plca_update_sint(&plca_cfg.burst_tmr, tb[ETHTOOL_A_PLCA_BURST_TMR],
&mod);
ret = 0;
if (!mod)
goto out_ops;
ret = ops->set_plca_cfg(dev->phydev, &plca_cfg, info->extack);
if (!ret)
goto out_ops;
ethtool_notify(dev, ETHTOOL_MSG_PLCA_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
ethnl_parse_header_dev_put(&req_info);
return ret;
}
// PLCA get status message -------------------------------------------------- //
const struct nla_policy ethnl_plca_get_status_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct plca_reply_data *data = PLCA_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
const struct ethtool_phy_ops *ops;
int ret;
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out;
}
// note: rtnl_lock is held already by ethnl_default_doit
ops = ethtool_phy_ops;
if (!ops || !ops->get_plca_status) {
ret = -EOPNOTSUPP;
goto out;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out;
memset(&data->plca_st, 0xff,
sizeof_field(struct plca_reply_data, plca_st));
ret = ops->get_plca_status(dev->phydev, &data->plca_st);
ethnl_ops_complete(dev);
out:
return ret;
}
static int plca_get_status_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
return nla_total_size(sizeof(u8)); /* _STATUS */
}
static int plca_get_status_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
const u8 status = data->plca_st.pst;
if (nla_put_u8(skb, ETHTOOL_A_PLCA_STATUS, !!status))
return -EMSGSIZE;
return 0;
};
const struct ethnl_request_ops ethnl_plca_status_request_ops = {
.request_cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
.reply_cmd = ETHTOOL_MSG_PLCA_GET_STATUS_REPLY,
.hdr_attr = ETHTOOL_A_PLCA_HEADER,
.req_info_size = sizeof(struct plca_req_info),
.reply_data_size = sizeof(struct plca_reply_data),
.prepare_data = plca_get_status_prepare_data,
.reply_size = plca_get_status_reply_size,
.fill_reply = plca_get_status_fill_reply,
};