mac80211: backport SAR power limit support
Needed for an upcoming mt76 update Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
parent
19228c4562
commit
890bf06cef
@ -0,0 +1,398 @@
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From: Carl Huang <cjhuang@codeaurora.org>
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Date: Thu, 3 Dec 2020 05:37:26 -0500
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Subject: [PATCH] nl80211: add common API to configure SAR power limitations
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NL80211_CMD_SET_SAR_SPECS is added to configure SAR from
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user space. NL80211_ATTR_SAR_SPEC is used to pass the SAR
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power specification when used with NL80211_CMD_SET_SAR_SPECS.
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Wireless driver needs to register SAR type, supported frequency
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ranges to wiphy, so user space can query it. The index in
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frequency range is used to specify which sub band the power
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limitation applies to. The SAR type is for compatibility, so later
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other SAR mechanism can be implemented without breaking the user
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space SAR applications.
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Normal process is user space queries the SAR capability, and
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gets the index of supported frequency ranges and associates the
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power limitation with this index and sends to kernel.
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Here is an example of message send to kernel:
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8c 00 00 00 08 00 01 00 00 00 00 00 38 00 2b 81
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08 00 01 00 00 00 00 00 2c 00 02 80 14 00 00 80
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08 00 02 00 00 00 00 00 08 00 01 00 38 00 00 00
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14 00 01 80 08 00 02 00 01 00 00 00 08 00 01 00
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48 00 00 00
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NL80211_CMD_SET_SAR_SPECS: 0x8c
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NL80211_ATTR_WIPHY: 0x01(phy idx is 0)
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NL80211_ATTR_SAR_SPEC: 0x812b (NLA_NESTED)
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NL80211_SAR_ATTR_TYPE: 0x00 (NL80211_SAR_TYPE_POWER)
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NL80211_SAR_ATTR_SPECS: 0x8002 (NLA_NESTED)
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freq range 0 power: 0x38 in 0.25dbm unit (14dbm)
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freq range 1 power: 0x48 in 0.25dbm unit (18dbm)
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Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
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Reviewed-by: Brian Norris <briannorris@chromium.org>
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Reviewed-by: Abhishek Kumar <kuabhs@chromium.org>
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Link: https://lore.kernel.org/r/20201203103728.3034-2-cjhuang@codeaurora.org
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[minor edits, NLA parse cleanups]
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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--- a/include/net/cfg80211.h
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+++ b/include/net/cfg80211.h
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@@ -1737,6 +1737,54 @@ struct station_info {
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u8 connected_to_as;
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};
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+/**
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+ * struct cfg80211_sar_sub_specs - sub specs limit
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+ * @power: power limitation in 0.25dbm
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+ * @freq_range_index: index the power limitation applies to
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+ */
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+struct cfg80211_sar_sub_specs {
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+ s32 power;
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+ u32 freq_range_index;
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+};
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+
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+/**
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+ * struct cfg80211_sar_specs - sar limit specs
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+ * @type: it's set with power in 0.25dbm or other types
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+ * @num_sub_specs: number of sar sub specs
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+ * @sub_specs: memory to hold the sar sub specs
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+ */
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+struct cfg80211_sar_specs {
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+ enum nl80211_sar_type type;
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+ u32 num_sub_specs;
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+ struct cfg80211_sar_sub_specs sub_specs[];
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+};
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+
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+
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+/**
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+ * @struct cfg80211_sar_chan_ranges - sar frequency ranges
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+ * @start_freq: start range edge frequency
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+ * @end_freq: end range edge frequency
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+ */
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+struct cfg80211_sar_freq_ranges {
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+ u32 start_freq;
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+ u32 end_freq;
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+};
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+
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+/**
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+ * struct cfg80211_sar_capa - sar limit capability
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+ * @type: it's set via power in 0.25dbm or other types
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+ * @num_freq_ranges: number of frequency ranges
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+ * @freq_ranges: memory to hold the freq ranges.
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+ *
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+ * Note: WLAN driver may append new ranges or split an existing
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+ * range to small ones and then append them.
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+ */
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+struct cfg80211_sar_capa {
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+ enum nl80211_sar_type type;
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+ u32 num_freq_ranges;
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+ const struct cfg80211_sar_freq_ranges *freq_ranges;
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+};
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+
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#if IS_ENABLED(CPTCFG_CFG80211)
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/**
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* cfg80211_get_station - retrieve information about a given station
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@@ -4259,6 +4307,8 @@ struct cfg80211_ops {
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struct cfg80211_tid_config *tid_conf);
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int (*reset_tid_config)(struct wiphy *wiphy, struct net_device *dev,
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const u8 *peer, u8 tids);
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+ int (*set_sar_specs)(struct wiphy *wiphy,
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+ struct cfg80211_sar_specs *sar);
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};
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/*
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@@ -5030,6 +5080,8 @@ struct wiphy {
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u8 max_data_retry_count;
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+ const struct cfg80211_sar_capa *sar_capa;
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+
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char priv[] __aligned(NETDEV_ALIGN);
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};
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--- a/net/wireless/nl80211.c
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+++ b/net/wireless/nl80211.c
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@@ -405,6 +405,18 @@ nl80211_unsol_bcast_probe_resp_policy[NL
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.len = IEEE80211_MAX_DATA_LEN }
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};
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+static const struct nla_policy
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+sar_specs_policy[NL80211_SAR_ATTR_SPECS_MAX + 1] = {
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+ [NL80211_SAR_ATTR_SPECS_POWER] = { .type = NLA_S32 },
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+ [NL80211_SAR_ATTR_SPECS_RANGE_INDEX] = {.type = NLA_U32 },
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+};
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+
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+static const struct nla_policy
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+sar_policy[NL80211_SAR_ATTR_MAX + 1] = {
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+ [NL80211_SAR_ATTR_TYPE] = NLA_POLICY_MAX(NLA_U32, NUM_NL80211_SAR_TYPE),
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+ [NL80211_SAR_ATTR_SPECS] = NLA_POLICY_NESTED_ARRAY(sar_specs_policy),
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+};
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+
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static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
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[0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
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[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
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@@ -739,6 +751,7 @@ static const struct nla_policy nl80211_p
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[NL80211_ATTR_SAE_PWE] =
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NLA_POLICY_RANGE(NLA_U8, NL80211_SAE_PWE_HUNT_AND_PECK,
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NL80211_SAE_PWE_BOTH),
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+ [NL80211_ATTR_SAR_SPEC] = NLA_POLICY_NESTED(sar_policy),
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[NL80211_ATTR_RECONNECT_REQUESTED] = { .type = NLA_REJECT },
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};
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@@ -2117,6 +2130,56 @@ fail:
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return -ENOBUFS;
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}
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+static int
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+nl80211_put_sar_specs(struct cfg80211_registered_device *rdev,
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+ struct sk_buff *msg)
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+{
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+ struct nlattr *sar_capa, *specs, *sub_freq_range;
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+ u8 num_freq_ranges;
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+ int i;
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+
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+ if (!rdev->wiphy.sar_capa)
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+ return 0;
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+
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+ num_freq_ranges = rdev->wiphy.sar_capa->num_freq_ranges;
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+
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+ sar_capa = nla_nest_start(msg, NL80211_ATTR_SAR_SPEC);
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+ if (!sar_capa)
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+ return -ENOSPC;
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+
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+ if (nla_put_u32(msg, NL80211_SAR_ATTR_TYPE, rdev->wiphy.sar_capa->type))
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+ goto fail;
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+
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+ specs = nla_nest_start(msg, NL80211_SAR_ATTR_SPECS);
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+ if (!specs)
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+ goto fail;
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+
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+ /* report supported freq_ranges */
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+ for (i = 0; i < num_freq_ranges; i++) {
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+ sub_freq_range = nla_nest_start(msg, i + 1);
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+ if (!sub_freq_range)
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+ goto fail;
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+
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+ if (nla_put_u32(msg, NL80211_SAR_ATTR_SPECS_START_FREQ,
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+ rdev->wiphy.sar_capa->freq_ranges[i].start_freq))
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+ goto fail;
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+
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+ if (nla_put_u32(msg, NL80211_SAR_ATTR_SPECS_END_FREQ,
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+ rdev->wiphy.sar_capa->freq_ranges[i].end_freq))
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+ goto fail;
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+
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+ nla_nest_end(msg, sub_freq_range);
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+ }
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+
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+ nla_nest_end(msg, specs);
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+ nla_nest_end(msg, sar_capa);
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+
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+ return 0;
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+fail:
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+ nla_nest_cancel(msg, sar_capa);
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+ return -ENOBUFS;
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+}
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+
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struct nl80211_dump_wiphy_state {
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s64 filter_wiphy;
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long start;
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@@ -2366,6 +2429,8 @@ static int nl80211_send_wiphy(struct cfg
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CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
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CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
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CMD(update_ft_ies, UPDATE_FT_IES);
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+ if (rdev->wiphy.sar_capa)
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+ CMD(set_sar_specs, SET_SAR_SPECS);
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}
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#undef CMD
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@@ -2691,6 +2756,11 @@ static int nl80211_send_wiphy(struct cfg
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if (nl80211_put_tid_config_support(rdev, msg))
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goto nla_put_failure;
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+ state->split_start++;
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+ break;
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+ case 16:
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+ if (nl80211_put_sar_specs(rdev, msg))
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+ goto nla_put_failure;
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/* done */
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state->split_start = 0;
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@@ -14713,6 +14783,111 @@ static void nl80211_post_doit(__genl_con
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}
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}
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+static int nl80211_set_sar_sub_specs(struct cfg80211_registered_device *rdev,
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+ struct cfg80211_sar_specs *sar_specs,
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+ struct nlattr *spec[], int index)
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+{
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+ u32 range_index, i;
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+
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+ if (!sar_specs || !spec)
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+ return -EINVAL;
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+
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+ if (!spec[NL80211_SAR_ATTR_SPECS_POWER] ||
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+ !spec[NL80211_SAR_ATTR_SPECS_RANGE_INDEX])
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+ return -EINVAL;
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+
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+ range_index = nla_get_u32(spec[NL80211_SAR_ATTR_SPECS_RANGE_INDEX]);
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+
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+ /* check if range_index exceeds num_freq_ranges */
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+ if (range_index >= rdev->wiphy.sar_capa->num_freq_ranges)
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+ return -EINVAL;
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+
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+ /* check if range_index duplicates */
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+ for (i = 0; i < index; i++) {
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+ if (sar_specs->sub_specs[i].freq_range_index == range_index)
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+ return -EINVAL;
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+ }
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+
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+ sar_specs->sub_specs[index].power =
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+ nla_get_s32(spec[NL80211_SAR_ATTR_SPECS_POWER]);
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+
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+ sar_specs->sub_specs[index].freq_range_index = range_index;
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+
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+ return 0;
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+}
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+
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+static int nl80211_set_sar_specs(struct sk_buff *skb, struct genl_info *info)
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+{
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+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
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+ struct nlattr *spec[NL80211_SAR_ATTR_SPECS_MAX + 1];
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+ struct nlattr *tb[NL80211_SAR_ATTR_MAX + 1];
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+ struct cfg80211_sar_specs *sar_spec;
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+ enum nl80211_sar_type type;
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+ struct nlattr *spec_list;
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+ u32 specs;
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+ int rem, err;
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+
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+ if (!rdev->wiphy.sar_capa || !rdev->ops->set_sar_specs)
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+ return -EOPNOTSUPP;
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+
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+ if (!info->attrs[NL80211_ATTR_SAR_SPEC])
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+ return -EINVAL;
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+
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+ nla_parse_nested(tb, NL80211_SAR_ATTR_MAX,
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+ info->attrs[NL80211_ATTR_SAR_SPEC],
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+ NULL, NULL);
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+
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+ if (!tb[NL80211_SAR_ATTR_TYPE] || !tb[NL80211_SAR_ATTR_SPECS])
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+ return -EINVAL;
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+
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+ type = nla_get_u32(tb[NL80211_SAR_ATTR_TYPE]);
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+ if (type != rdev->wiphy.sar_capa->type)
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+ return -EINVAL;
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+
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+ specs = 0;
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+ nla_for_each_nested(spec_list, tb[NL80211_SAR_ATTR_SPECS], rem)
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+ specs++;
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+
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+ if (specs > rdev->wiphy.sar_capa->num_freq_ranges)
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+ return -EINVAL;
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+
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+ sar_spec = kzalloc(sizeof(*sar_spec) +
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+ specs * sizeof(struct cfg80211_sar_sub_specs),
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+ GFP_KERNEL);
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+ if (!sar_spec)
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+ return -ENOMEM;
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+
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+ sar_spec->type = type;
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+ specs = 0;
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+ nla_for_each_nested(spec_list, tb[NL80211_SAR_ATTR_SPECS], rem) {
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+ nla_parse_nested(spec, NL80211_SAR_ATTR_SPECS_MAX,
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+ spec_list, NULL, NULL);
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+
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+ switch (type) {
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+ case NL80211_SAR_TYPE_POWER:
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+ if (nl80211_set_sar_sub_specs(rdev, sar_spec,
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+ spec, specs)) {
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+ err = -EINVAL;
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+ goto error;
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+ }
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+ break;
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+ default:
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+ err = -EINVAL;
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+ goto error;
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+ }
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+ specs++;
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+ }
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+
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+ sar_spec->num_sub_specs = specs;
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+
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+ rdev->cur_cmd_info = info;
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+ err = rdev_set_sar_specs(rdev, sar_spec);
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+ rdev->cur_cmd_info = NULL;
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+error:
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+ kfree(sar_spec);
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+ return err;
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+}
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+
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static __genl_const struct genl_ops nl80211_ops[] = {
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{
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.cmd = NL80211_CMD_GET_WIPHY,
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@@ -15576,6 +15751,14 @@ static const struct genl_small_ops nl802
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.internal_flags = NL80211_FLAG_NEED_NETDEV |
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NL80211_FLAG_NEED_RTNL,
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},
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+ {
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+ .cmd = NL80211_CMD_SET_SAR_SPECS,
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+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
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+ .doit = nl80211_set_sar_specs,
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+ .flags = GENL_UNS_ADMIN_PERM,
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+ .internal_flags = NL80211_FLAG_NEED_WIPHY |
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+ NL80211_FLAG_NEED_RTNL,
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+ },
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};
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static struct genl_family nl80211_fam __genl_ro_after_init = {
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--- a/net/wireless/rdev-ops.h
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+++ b/net/wireless/rdev-ops.h
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@@ -1356,4 +1356,16 @@ static inline int rdev_reset_tid_config(
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return ret;
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}
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+static inline int rdev_set_sar_specs(struct cfg80211_registered_device *rdev,
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+ struct cfg80211_sar_specs *sar)
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+{
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+ int ret;
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+
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+ trace_rdev_set_sar_specs(&rdev->wiphy, sar);
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+ ret = rdev->ops->set_sar_specs(&rdev->wiphy, sar);
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+ trace_rdev_return_int(&rdev->wiphy, ret);
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+
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+ return ret;
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+}
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+
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#endif /* __CFG80211_RDEV_OPS */
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--- a/net/wireless/trace.h
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+++ b/net/wireless/trace.h
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@@ -3551,6 +3551,25 @@ TRACE_EVENT(rdev_reset_tid_config,
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TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", peer: " MAC_PR_FMT ", tids: 0x%x",
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WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(peer), __entry->tids)
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);
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+
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+TRACE_EVENT(rdev_set_sar_specs,
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+ TP_PROTO(struct wiphy *wiphy, struct cfg80211_sar_specs *sar),
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+ TP_ARGS(wiphy, sar),
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+ TP_STRUCT__entry(
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+ WIPHY_ENTRY
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+ __field(u16, type)
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+ __field(u16, num)
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+ ),
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+ TP_fast_assign(
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+ WIPHY_ASSIGN;
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+ __entry->type = sar->type;
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+ __entry->num = sar->num_sub_specs;
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+
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+ ),
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+ TP_printk(WIPHY_PR_FMT ", Set type:%d, num_specs:%d",
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+ WIPHY_PR_ARG, __entry->type, __entry->num)
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+);
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+
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#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
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#undef TRACE_INCLUDE_PATH
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@ -0,0 +1,51 @@
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From: Carl Huang <cjhuang@codeaurora.org>
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Date: Thu, 3 Dec 2020 05:37:27 -0500
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Subject: [PATCH] mac80211: add ieee80211_set_sar_specs
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This change registers ieee80211_set_sar_specs to
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mac80211_config_ops, so cfg80211 can call it.
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Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
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Reviewed-by: Brian Norris <briannorris@chromium.org>
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Reviewed-by: Abhishek Kumar <kuabhs@chromium.org>
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Link: https://lore.kernel.org/r/20201203103728.3034-3-cjhuang@codeaurora.org
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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--- a/include/net/mac80211.h
|
||||
+++ b/include/net/mac80211.h
|
||||
@@ -4207,6 +4207,8 @@ struct ieee80211_ops {
|
||||
struct ieee80211_vif *vif);
|
||||
void (*sta_set_4addr)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
|
||||
struct ieee80211_sta *sta, bool enabled);
|
||||
+ int (*set_sar_specs)(struct ieee80211_hw *hw,
|
||||
+ const struct cfg80211_sar_specs *sar);
|
||||
void (*sta_set_decap_offload)(struct ieee80211_hw *hw,
|
||||
struct ieee80211_vif *vif,
|
||||
struct ieee80211_sta *sta, bool enabled);
|
||||
--- a/net/mac80211/cfg.c
|
||||
+++ b/net/mac80211/cfg.c
|
||||
@@ -4136,6 +4136,17 @@ static int ieee80211_reset_tid_config(st
|
||||
return ret;
|
||||
}
|
||||
|
||||
+static int ieee80211_set_sar_specs(struct wiphy *wiphy,
|
||||
+ struct cfg80211_sar_specs *sar)
|
||||
+{
|
||||
+ struct ieee80211_local *local = wiphy_priv(wiphy);
|
||||
+
|
||||
+ if (!local->ops->set_sar_specs)
|
||||
+ return -EOPNOTSUPP;
|
||||
+
|
||||
+ return local->ops->set_sar_specs(&local->hw, sar);
|
||||
+}
|
||||
+
|
||||
const struct cfg80211_ops mac80211_config_ops = {
|
||||
.add_virtual_intf = ieee80211_add_iface,
|
||||
.del_virtual_intf = ieee80211_del_iface,
|
||||
@@ -4239,4 +4250,5 @@ const struct cfg80211_ops mac80211_confi
|
||||
.probe_mesh_link = ieee80211_probe_mesh_link,
|
||||
.set_tid_config = ieee80211_set_tid_config,
|
||||
.reset_tid_config = ieee80211_reset_tid_config,
|
||||
+ .set_sar_specs = ieee80211_set_sar_specs,
|
||||
};
|
||||
@ -1,6 +1,6 @@
|
||||
--- a/include/net/cfg80211.h
|
||||
+++ b/include/net/cfg80211.h
|
||||
@@ -3745,6 +3745,7 @@ struct mgmt_frame_regs {
|
||||
@@ -3793,6 +3793,7 @@ struct mgmt_frame_regs {
|
||||
* (as advertised by the nl80211 feature flag.)
|
||||
* @get_tx_power: store the current TX power into the dbm variable;
|
||||
* return 0 if successful
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
* @set_wds_peer: set the WDS peer for a WDS interface
|
||||
*
|
||||
@@ -4067,6 +4068,7 @@ struct cfg80211_ops {
|
||||
@@ -4115,6 +4116,7 @@ struct cfg80211_ops {
|
||||
enum nl80211_tx_power_setting type, int mbm);
|
||||
int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
|
||||
int *dbm);
|
||||
@ -57,7 +57,7 @@
|
||||
__NL80211_ATTR_AFTER_LAST,
|
||||
--- a/net/mac80211/cfg.c
|
||||
+++ b/net/mac80211/cfg.c
|
||||
@@ -2742,6 +2742,19 @@ static int ieee80211_get_tx_power(struct
|
||||
@@ -2761,6 +2761,19 @@ static int ieee80211_get_tx_power(struct
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -77,7 +77,7 @@
|
||||
static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
|
||||
const u8 *addr)
|
||||
{
|
||||
@@ -4172,6 +4185,7 @@ const struct cfg80211_ops mac80211_confi
|
||||
@@ -4202,6 +4215,7 @@ const struct cfg80211_ops mac80211_confi
|
||||
.set_wiphy_params = ieee80211_set_wiphy_params,
|
||||
.set_tx_power = ieee80211_set_tx_power,
|
||||
.get_tx_power = ieee80211_get_tx_power,
|
||||
@ -129,15 +129,15 @@
|
||||
local->hw.max_mtu = IEEE80211_MAX_DATA_LEN;
|
||||
--- a/net/wireless/nl80211.c
|
||||
+++ b/net/wireless/nl80211.c
|
||||
@@ -740,6 +740,7 @@ static const struct nla_policy nl80211_p
|
||||
NLA_POLICY_RANGE(NLA_U8, NL80211_SAE_PWE_HUNT_AND_PECK,
|
||||
@@ -753,6 +753,7 @@ static const struct nla_policy nl80211_p
|
||||
NL80211_SAE_PWE_BOTH),
|
||||
[NL80211_ATTR_SAR_SPEC] = NLA_POLICY_NESTED(sar_policy),
|
||||
[NL80211_ATTR_RECONNECT_REQUESTED] = { .type = NLA_REJECT },
|
||||
+ [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
|
||||
};
|
||||
|
||||
/* policy for the key attributes */
|
||||
@@ -3248,6 +3249,20 @@ static int nl80211_set_wiphy(struct sk_b
|
||||
@@ -3318,6 +3319,20 @@ static int nl80211_set_wiphy(struct sk_b
|
||||
if (result)
|
||||
return result;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user