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[iwm] Check for lar_disable tunable, and lar_enabled flag from NVM.

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* LAR can be disabled with the hw.iwm.lar.disable tunable now.

* On Family 8000 devices we need to check the lar_enabled flag from
  nvm_data in addition to the TLV_CAPA_LAR_SUPPORT flag from the firmware.

* Add a separate IWM_DEBUG_LAR debugging flag.

Obtained from:	dragonflybsd.git 0593e39cb295aa996ecf789ed4990c3b255f1770
This commit is contained in:
Adrian Chadd 2017-06-04 21:10:14 +00:00
parent cd684deca9
commit 19d956ec90
3 changed files with 59 additions and 9 deletions
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66
sys/dev/iwm/if_iwm.c
View File

@ -356,6 +356,8 @@ static int iwm_media_change(struct ifnet *);
static int iwm_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static void iwm_endscan_cb(void *, int);
static int iwm_send_bt_init_conf(struct iwm_softc *);
static boolean_t iwm_mvm_is_lar_supported(struct iwm_softc *);
static boolean_t iwm_mvm_is_wifi_mcc_supported(struct iwm_softc *);
static int iwm_send_update_mcc_cmd(struct iwm_softc *, const char *);
static void iwm_mvm_tt_tx_backoff(struct iwm_softc *, uint32_t);
static int iwm_init_hw(struct iwm_softc *);
@ -394,6 +396,9 @@ static void iwm_scan_curchan(struct ieee80211_scan_state *, unsigned long);
static void iwm_scan_mindwell(struct ieee80211_scan_state *);
static int iwm_detach(device_t);
static int iwm_lar_disable = 0;
TUNABLE_INT("hw.iwm.lar.disable", &iwm_lar_disable);
/*
* Firmware parser.
*/
@ -2186,6 +2191,7 @@ iwm_parse_nvm_data(struct iwm_softc *sc,
{
struct iwm_nvm_data *data;
uint32_t sku, radio_cfg;
uint16_t lar_config;
if (sc->cfg->device_family != IWM_DEVICE_FAMILY_8000) {
data = malloc(sizeof(*data) +
@ -2211,6 +2217,16 @@ iwm_parse_nvm_data(struct iwm_softc *sc,
data->n_hw_addrs = iwm_get_n_hw_addrs(sc, nvm_sw);
if (sc->cfg->device_family == IWM_DEVICE_FAMILY_8000) {
uint16_t lar_offset = data->nvm_version < 0xE39 ?
IWM_NVM_LAR_OFFSET_8000_OLD :
IWM_NVM_LAR_OFFSET_8000;
lar_config = le16_to_cpup(regulatory + lar_offset);
data->lar_enabled = !!(lar_config &
IWM_NVM_LAR_ENABLED_8000);
}
/* If no valid mac address was found - bail out */
if (iwm_set_hw_address(sc, data, nvm_hw, mac_override)) {
free(data, M_DEVBUF);
@ -4507,6 +4523,35 @@ iwm_send_bt_init_conf(struct iwm_softc *sc)
&bt_cmd);
}
static boolean_t
iwm_mvm_is_lar_supported(struct iwm_softc *sc)
{
boolean_t nvm_lar = sc->nvm_data->lar_enabled;
boolean_t tlv_lar = fw_has_capa(&sc->ucode_capa,
IWM_UCODE_TLV_CAPA_LAR_SUPPORT);
if (iwm_lar_disable)
return FALSE;
/*
* Enable LAR only if it is supported by the FW (TLV) &&
* enabled in the NVM
*/
if (sc->cfg->device_family == IWM_DEVICE_FAMILY_8000)
return nvm_lar && tlv_lar;
else
return tlv_lar;
}
static boolean_t
iwm_mvm_is_wifi_mcc_supported(struct iwm_softc *sc)
{
return fw_has_api(&sc->ucode_capa,
IWM_UCODE_TLV_API_WIFI_MCC_UPDATE) ||
fw_has_capa(&sc->ucode_capa,
IWM_UCODE_TLV_CAPA_LAR_MULTI_MCC);
}
static int
iwm_send_update_mcc_cmd(struct iwm_softc *sc, const char *alpha2)
{
@ -4527,10 +4572,15 @@ iwm_send_update_mcc_cmd(struct iwm_softc *sc, const char *alpha2)
int resp_v2 = fw_has_capa(&sc->ucode_capa,
IWM_UCODE_TLV_CAPA_LAR_SUPPORT_V2);
if (!iwm_mvm_is_lar_supported(sc)) {
IWM_DPRINTF(sc, IWM_DEBUG_LAR, "%s: no LAR support\n",
__func__);
return 0;
}
memset(&mcc_cmd, 0, sizeof(mcc_cmd));
mcc_cmd.mcc = htole16(alpha2[0] << 8 | alpha2[1]);
if (fw_has_api(&sc->ucode_capa, IWM_UCODE_TLV_API_WIFI_MCC_UPDATE) ||
fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_LAR_MULTI_MCC))
if (iwm_mvm_is_wifi_mcc_supported(sc))
mcc_cmd.source_id = IWM_MCC_SOURCE_GET_CURRENT;
else
mcc_cmd.source_id = IWM_MCC_SOURCE_OLD_FW;
@ -4540,7 +4590,7 @@ iwm_send_update_mcc_cmd(struct iwm_softc *sc, const char *alpha2)
else
hcmd.len[0] = sizeof(struct iwm_mcc_update_cmd_v1);
IWM_DPRINTF(sc, IWM_DEBUG_NODE,
IWM_DPRINTF(sc, IWM_DEBUG_LAR,
"send MCC update to FW with '%c%c' src = %d\n",
alpha2[0], alpha2[1], mcc_cmd.source_id);
@ -4566,7 +4616,7 @@ iwm_send_update_mcc_cmd(struct iwm_softc *sc, const char *alpha2)
if (mcc == 0)
mcc = 0x3030; /* "00" - world */
IWM_DPRINTF(sc, IWM_DEBUG_NODE,
IWM_DPRINTF(sc, IWM_DEBUG_LAR,
"regulatory domain '%c%c' (%d channels available)\n",
mcc >> 8, mcc & 0xff, n_channels);
#endif
@ -4675,10 +4725,8 @@ iwm_init_hw(struct iwm_softc *sc)
if (error)
goto error;
if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_LAR_SUPPORT)) {
if ((error = iwm_send_update_mcc_cmd(sc, "ZZ")) != 0)
goto error;
}
if ((error = iwm_send_update_mcc_cmd(sc, "ZZ")) != 0)
goto error;
if (fw_has_capa(&sc->ucode_capa, IWM_UCODE_TLV_CAPA_UMAC_SCAN)) {
if ((error = iwm_mvm_config_umac_scan(sc)) != 0)
@ -5275,7 +5323,7 @@ iwm_handle_rxb(struct iwm_softc *sc, struct mbuf *m)
sc->sc_fw_mcc[0] = (notif->mcc & 0xff00) >> 8;
sc->sc_fw_mcc[1] = notif->mcc & 0xff;
sc->sc_fw_mcc[2] = '\0';
IWM_DPRINTF(sc, IWM_DEBUG_RESET,
IWM_DPRINTF(sc, IWM_DEBUG_LAR,
"fw source %d sent CC '%s'\n",
notif->source_id, sc->sc_fw_mcc);
break;

1
sys/dev/iwm/if_iwm_debug.h
View File

@ -43,6 +43,7 @@ enum {
IWM_DEBUG_EEPROM = 0x00080000, /* EEPROM/channel information */
IWM_DEBUG_TEMP = 0x00100000, /* Thermal Sensor handling */
IWM_DEBUG_FW = 0x00200000, /* Firmware management */
IWM_DEBUG_LAR = 0x00400000, /* Location Aware Regulatory */
IWM_DEBUG_REGISTER = 0x20000000, /* print chipset register */
IWM_DEBUG_TRACE = 0x40000000, /* Print begin and start driver function */
IWM_DEBUG_FATAL = 0x80000000, /* fatal errors */

1
sys/dev/iwm/if_iwmvar.h
View File

@ -232,6 +232,7 @@ struct iwm_nvm_data {
uint16_t nvm_version;
uint8_t max_tx_pwr_half_dbm;
boolean_t lar_enabled;
uint16_t nvm_ch_flags[];
};