diff options
Diffstat (limited to 'drivers/net/wireless/ath/carl9170')
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/carl9170.h | 24 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/cmd.c | 34 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/cmd.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/fw.c | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/fwcmd.h | 11 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/main.c | 229 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/phy.c | 16 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/carl9170/version.h | 4 |
9 files changed, 315 insertions, 21 deletions
diff --git a/drivers/net/wireless/ath/carl9170/Kconfig b/drivers/net/wireless/ath/carl9170/Kconfig index 2d1b821b440d..267d5dcf82dc 100644 --- a/drivers/net/wireless/ath/carl9170/Kconfig +++ b/drivers/net/wireless/ath/carl9170/Kconfig @@ -39,3 +39,17 @@ config CARL9170_WPC bool depends on CARL9170 && (INPUT = y || INPUT = CARL9170) default y + +config CARL9170_HWRNG + bool "Random number generator" + depends on CARL9170 && (HW_RANDOM = y || HW_RANDOM = CARL9170) + default n + help + Provides a hardware random number generator to the kernel. + + SECURITY WARNING: It's relatively easy to eavesdrop all + generated random numbers from the transport stream with + usbmon [software] or special usb sniffer hardware. + + Say N, unless your setup[i.e.: embedded system] has no + other rng source and you can afford to take the risk. diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h index c5427a72a1e2..6cfbb419e2f6 100644 --- a/drivers/net/wireless/ath/carl9170/carl9170.h +++ b/drivers/net/wireless/ath/carl9170/carl9170.h @@ -43,6 +43,7 @@ #include <linux/firmware.h> #include <linux/completion.h> #include <linux/spinlock.h> +#include <linux/hw_random.h> #include <net/cfg80211.h> #include <net/mac80211.h> #include <linux/usb.h> @@ -151,6 +152,7 @@ struct carl9170_sta_tid { #define CARL9170_TX_TIMEOUT 2500 #define CARL9170_JANITOR_DELAY 128 #define CARL9170_QUEUE_STUCK_TIMEOUT 5500 +#define CARL9170_STAT_WORK 30000 #define CARL9170_NUM_TX_AGG_MAX 30 @@ -282,6 +284,7 @@ struct ar9170 { bool rx_stream; bool tx_stream; bool rx_filter; + bool hw_counters; unsigned int mem_blocks; unsigned int mem_block_size; unsigned int rx_size; @@ -331,11 +334,21 @@ struct ar9170 { /* PHY */ struct ieee80211_channel *channel; + unsigned int num_channels; int noise[4]; unsigned int chan_fail; unsigned int total_chan_fail; u8 heavy_clip; u8 ht_settings; + struct { + u64 active; /* usec */ + u64 cca; /* usec */ + u64 tx_time; /* usec */ + u64 rx_total; + u64 rx_overrun; + } tally; + struct delayed_work stat_work; + struct survey_info *survey; /* power calibration data */ u8 power_5G_leg[4]; @@ -437,6 +450,17 @@ struct ar9170 { unsigned int off_override; bool state; } ps; + +#ifdef CONFIG_CARL9170_HWRNG +# define CARL9170_HWRNG_CACHE_SIZE CARL9170_MAX_CMD_PAYLOAD_LEN + struct { + struct hwrng rng; + bool initialized; + char name[30 + 1]; + u16 cache[CARL9170_HWRNG_CACHE_SIZE / sizeof(u16)]; + unsigned int cache_idx; + } rng; +#endif /* CONFIG_CARL9170_HWRNG */ }; enum carl9170_ps_off_override_reasons { diff --git a/drivers/net/wireless/ath/carl9170/cmd.c b/drivers/net/wireless/ath/carl9170/cmd.c index cdfc94c371b4..195dc6538110 100644 --- a/drivers/net/wireless/ath/carl9170/cmd.c +++ b/drivers/net/wireless/ath/carl9170/cmd.c @@ -36,6 +36,7 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include <asm/div64.h> #include "carl9170.h" #include "cmd.h" @@ -165,6 +166,39 @@ int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id, return __carl9170_exec_cmd(ar, cmd, true); } +int carl9170_collect_tally(struct ar9170 *ar) +{ + struct carl9170_tally_rsp tally; + struct survey_info *info; + unsigned int tick; + int err; + + err = carl9170_exec_cmd(ar, CARL9170_CMD_TALLY, 0, NULL, + sizeof(tally), (u8 *)&tally); + if (err) + return err; + + tick = le32_to_cpu(tally.tick); + if (tick) { + ar->tally.active += le32_to_cpu(tally.active) / tick; + ar->tally.cca += le32_to_cpu(tally.cca) / tick; + ar->tally.tx_time += le32_to_cpu(tally.tx_time) / tick; + ar->tally.rx_total += le32_to_cpu(tally.rx_total); + ar->tally.rx_overrun += le32_to_cpu(tally.rx_overrun); + + if (ar->channel) { + info = &ar->survey[ar->channel->hw_value]; + info->channel_time = ar->tally.active; + info->channel_time_busy = ar->tally.cca; + info->channel_time_tx = ar->tally.tx_time; + do_div(info->channel_time, 1000); + do_div(info->channel_time_busy, 1000); + do_div(info->channel_time_tx, 1000); + } + } + return 0; +} + int carl9170_powersave(struct ar9170 *ar, const bool ps) { struct carl9170_cmd *cmd; diff --git a/drivers/net/wireless/ath/carl9170/cmd.h b/drivers/net/wireless/ath/carl9170/cmd.h index d5f95bdc75c1..885c42778b8b 100644 --- a/drivers/net/wireless/ath/carl9170/cmd.h +++ b/drivers/net/wireless/ath/carl9170/cmd.h @@ -50,6 +50,7 @@ int carl9170_echo_test(struct ar9170 *ar, u32 v); int carl9170_reboot(struct ar9170 *ar); int carl9170_mac_reset(struct ar9170 *ar); int carl9170_powersave(struct ar9170 *ar, const bool power_on); +int carl9170_collect_tally(struct ar9170 *ar); int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id, const u32 mode, const u32 addr, const u32 len); diff --git a/drivers/net/wireless/ath/carl9170/fw.c b/drivers/net/wireless/ath/carl9170/fw.c index 39ddea5794f7..f4cae1cccbff 100644 --- a/drivers/net/wireless/ath/carl9170/fw.c +++ b/drivers/net/wireless/ath/carl9170/fw.c @@ -266,6 +266,9 @@ static int carl9170_fw(struct ar9170 *ar, const __u8 *data, size_t len) FIF_PROMISC_IN_BSS; } + if (SUPP(CARL9170FW_HW_COUNTERS)) + ar->fw.hw_counters = true; + if (SUPP(CARL9170FW_WOL)) device_set_wakeup_enable(&ar->udev->dev, true); diff --git a/drivers/net/wireless/ath/carl9170/fwcmd.h b/drivers/net/wireless/ath/carl9170/fwcmd.h index 0a6dec529b59..9443c802b25b 100644 --- a/drivers/net/wireless/ath/carl9170/fwcmd.h +++ b/drivers/net/wireless/ath/carl9170/fwcmd.h @@ -55,6 +55,7 @@ enum carl9170_cmd_oids { CARL9170_CMD_READ_TSF = 0x06, CARL9170_CMD_RX_FILTER = 0x07, CARL9170_CMD_WOL = 0x08, + CARL9170_CMD_TALLY = 0x09, /* CAM */ CARL9170_CMD_EKEY = 0x10, @@ -286,6 +287,15 @@ struct carl9170_tsf_rsp { } __packed; #define CARL9170_TSF_RSP_SIZE 8 +struct carl9170_tally_rsp { + __le32 active; + __le32 cca; + __le32 tx_time; + __le32 rx_total; + __le32 rx_overrun; + __le32 tick; +} __packed; + struct carl9170_rsp { struct carl9170_cmd_head hdr; @@ -300,6 +310,7 @@ struct carl9170_rsp { struct carl9170_gpio gpio; struct carl9170_tsf_rsp tsf; struct carl9170_psm psm; + struct carl9170_tally_rsp tally; u8 data[CARL9170_MAX_CMD_PAYLOAD_LEN]; } __packed; } __packed __aligned(4); diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c index 0122930b14c7..782b8f3ae58f 100644 --- a/drivers/net/wireless/ath/carl9170/main.c +++ b/drivers/net/wireless/ath/carl9170/main.c @@ -413,6 +413,9 @@ static int carl9170_op_start(struct ieee80211_hw *hw) carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED); + ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, + round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); + ieee80211_wake_queues(ar->hw); err = 0; @@ -423,6 +426,7 @@ out: static void carl9170_cancel_worker(struct ar9170 *ar) { + cancel_delayed_work_sync(&ar->stat_work); cancel_delayed_work_sync(&ar->tx_janitor); #ifdef CONFIG_CARL9170_LEDS cancel_delayed_work_sync(&ar->led_work); @@ -794,6 +798,43 @@ static void carl9170_ps_work(struct work_struct *work) mutex_unlock(&ar->mutex); } +static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise) +{ + int err; + + if (noise) { + err = carl9170_get_noisefloor(ar); + if (err) + return err; + } + + if (ar->fw.hw_counters) { + err = carl9170_collect_tally(ar); + if (err) + return err; + } + + if (flush) + memset(&ar->tally, 0, sizeof(ar->tally)); + + return 0; +} + +static void carl9170_stat_work(struct work_struct *work) +{ + struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work); + int err; + + mutex_lock(&ar->mutex); + err = carl9170_update_survey(ar, false, true); + mutex_unlock(&ar->mutex); + + if (err) + return; + + ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, + round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); +} static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) { @@ -828,11 +869,19 @@ static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) if (err) goto out; + err = carl9170_update_survey(ar, true, false); + if (err) + goto out; + err = carl9170_set_channel(ar, hw->conf.channel, hw->conf.channel_type, CARL9170_RFI_NONE); if (err) goto out; + err = carl9170_update_survey(ar, false, true); + if (err) + goto out; + err = carl9170_set_dyn_sifs_ack(ar); if (err) goto out; @@ -1419,24 +1468,159 @@ static int carl9170_register_wps_button(struct ar9170 *ar) } #endif /* CONFIG_CARL9170_WPC */ -static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, - struct survey_info *survey) +#ifdef CONFIG_CARL9170_HWRNG +static int carl9170_rng_get(struct ar9170 *ar) { - struct ar9170 *ar = hw->priv; + +#define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32)) +#define RB (CARL9170_MAX_CMD_PAYLOAD_LEN) + + static const __le32 rng_load[RW] = { + [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)}; + + u32 buf[RW]; + + unsigned int i, off = 0, transfer, count; int err; - if (idx != 0) - return -ENOENT; + BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN); + + if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized) + return -EAGAIN; + + count = ARRAY_SIZE(ar->rng.cache); + while (count) { + err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, + RB, (u8 *) rng_load, + RB, (u8 *) buf); + if (err) + return err; + + transfer = min_t(unsigned int, count, RW); + for (i = 0; i < transfer; i++) + ar->rng.cache[off + i] = buf[i]; + + off += transfer; + count -= transfer; + } + + ar->rng.cache_idx = 0; + +#undef RW +#undef RB + return 0; +} + +static int carl9170_rng_read(struct hwrng *rng, u32 *data) +{ + struct ar9170 *ar = (struct ar9170 *)rng->priv; + int ret = -EIO; mutex_lock(&ar->mutex); - err = carl9170_get_noisefloor(ar); + if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) { + ret = carl9170_rng_get(ar); + if (ret) { + mutex_unlock(&ar->mutex); + return ret; + } + } + + *data = ar->rng.cache[ar->rng.cache_idx++]; mutex_unlock(&ar->mutex); - if (err) + + return sizeof(u16); +} + +static void carl9170_unregister_hwrng(struct ar9170 *ar) +{ + if (ar->rng.initialized) { + hwrng_unregister(&ar->rng.rng); + ar->rng.initialized = false; + } +} + +static int carl9170_register_hwrng(struct ar9170 *ar) +{ + int err; + + snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name), + "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy)); + ar->rng.rng.name = ar->rng.name; + ar->rng.rng.data_read = carl9170_rng_read; + ar->rng.rng.priv = (unsigned long)ar; + + if (WARN_ON(ar->rng.initialized)) + return -EALREADY; + + err = hwrng_register(&ar->rng.rng); + if (err) { + dev_err(&ar->udev->dev, "Failed to register the random " + "number generator (%d)\n", err); return err; + } + + ar->rng.initialized = true; + + err = carl9170_rng_get(ar); + if (err) { + carl9170_unregister_hwrng(ar); + return err; + } + + return 0; +} +#endif /* CONFIG_CARL9170_HWRNG */ + +static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, + struct survey_info *survey) +{ + struct ar9170 *ar = hw->priv; + struct ieee80211_channel *chan; + struct ieee80211_supported_band *band; + int err, b, i; + + chan = ar->channel; + if (!chan) + return -ENODEV; + + if (idx == chan->hw_value) { + mutex_lock(&ar->mutex); + err = carl9170_update_survey(ar, false, true); + mutex_unlock(&ar->mutex); + if (err) + return err; + } + + for (b = 0; b < IEEE80211_NUM_BANDS; b++) { + band = ar->hw->wiphy->bands[b]; + + if (!band) + continue; + + for (i = 0; i < band->n_channels; i++) { + if (band->channels[i].hw_value == idx) { + chan = &band->channels[i]; + goto found; + } + } + } + return -ENOENT; + +found: + memcpy(survey, &ar->survey[idx], sizeof(*survey)); - survey->channel = ar->channel; + survey->channel = chan; survey->filled = SURVEY_INFO_NOISE_DBM; - survey->noise = ar->noise[0]; + + if (ar->channel == chan) + survey->filled |= SURVEY_INFO_IN_USE; + + if (ar->fw.hw_counters) { + survey->filled |= SURVEY_INFO_CHANNEL_TIME | + SURVEY_INFO_CHANNEL_TIME_BUSY | + SURVEY_INFO_CHANNEL_TIME_TX; + } + return 0; } @@ -1569,6 +1753,7 @@ void *carl9170_alloc(size_t priv_size) INIT_WORK(&ar->ping_work, carl9170_ping_work); INIT_WORK(&ar->restart_work, carl9170_restart_work); INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work); + INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work); INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor); INIT_LIST_HEAD(&ar->tx_ampdu_list); rcu_assign_pointer(ar->tx_ampdu_iter, @@ -1652,6 +1837,7 @@ static int carl9170_parse_eeprom(struct ar9170 *ar) struct ath_regulatory *regulatory = &ar->common.regulatory; unsigned int rx_streams, tx_streams, tx_params = 0; int bands = 0; + int chans = 0; if (ar->eeprom.length == cpu_to_le16(0xffff)) return -ENODATA; @@ -1675,14 +1861,24 @@ static int carl9170_parse_eeprom(struct ar9170 *ar) if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &carl9170_band_2GHz; + chans += carl9170_band_2GHz.n_channels; bands++; } if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &carl9170_band_5GHz; + chans += carl9170_band_5GHz.n_channels; bands++; } + if (!bands) + return -EINVAL; + + ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL); + if (!ar->survey) + return -ENOMEM; + ar->num_channels = chans; + /* * I measured this, a bandswitch takes roughly * 135 ms and a frequency switch about 80. @@ -1701,7 +1897,7 @@ static int carl9170_parse_eeprom(struct ar9170 *ar) /* second part of wiphy init */ SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address); - return bands ? 0 : -EINVAL; + return 0; } static int carl9170_reg_notifier(struct wiphy *wiphy, @@ -1785,6 +1981,12 @@ int carl9170_register(struct ar9170 *ar) goto err_unreg; #endif /* CONFIG_CARL9170_WPC */ +#ifdef CONFIG_CARL9170_HWRNG + err = carl9170_register_hwrng(ar); + if (err) + goto err_unreg; +#endif /* CONFIG_CARL9170_HWRNG */ + dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n", wiphy_name(ar->hw->wiphy)); @@ -1817,6 +2019,10 @@ void carl9170_unregister(struct ar9170 *ar) } #endif /* CONFIG_CARL9170_WPC */ +#ifdef CONFIG_CARL9170_HWRNG + carl9170_unregister_hwrng(ar); +#endif /* CONFIG_CARL9170_HWRNG */ + carl9170_cancel_worker(ar); cancel_work_sync(&ar->restart_work); @@ -1834,6 +2040,9 @@ void carl9170_free(struct ar9170 *ar) kfree(ar->mem_bitmap); ar->mem_bitmap = NULL; + kfree(ar->survey); + ar->survey = NULL; + mutex_destroy(&ar->mutex); ieee80211_free_hw(ar->hw); diff --git a/drivers/net/wireless/ath/carl9170/phy.c b/drivers/net/wireless/ath/carl9170/phy.c index aa147a9120b6..472efc7e3402 100644 --- a/drivers/net/wireless/ath/carl9170/phy.c +++ b/drivers/net/wireless/ath/carl9170/phy.c @@ -578,11 +578,10 @@ static int carl9170_init_phy(struct ar9170 *ar, enum ieee80211_band band) if (err) return err; - /* XXX: remove magic! */ - if (is_2ghz) - err = carl9170_write_reg(ar, AR9170_PWR_REG_PLL_ADDAC, 0x5163); - else - err = carl9170_write_reg(ar, AR9170_PWR_REG_PLL_ADDAC, 0x5143); + if (!ar->fw.hw_counters) { + err = carl9170_write_reg(ar, AR9170_PWR_REG_PLL_ADDAC, + is_2ghz ? 0x5163 : 0x5143); + } return err; } @@ -1574,6 +1573,9 @@ int carl9170_get_noisefloor(struct ar9170 *ar) AR9170_PHY_EXT_CCA_MIN_PWR, phy_res[i + 2]), 8); } + if (ar->channel) + ar->survey[ar->channel->hw_value].noise = ar->noise[0]; + return 0; } @@ -1766,10 +1768,6 @@ int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, ar->chan_fail = 0; } - err = carl9170_get_noisefloor(ar); - if (err) - return err; - if (ar->heavy_clip) { err = carl9170_write_reg(ar, AR9170_PHY_REG_HEAVY_CLIP_ENABLE, 0x200 | ar->heavy_clip); diff --git a/drivers/net/wireless/ath/carl9170/version.h b/drivers/net/wireless/ath/carl9170/version.h index 64703778cfea..e651db856344 100644 --- a/drivers/net/wireless/ath/carl9170/version.h +++ b/drivers/net/wireless/ath/carl9170/version.h @@ -1,7 +1,7 @@ #ifndef __CARL9170_SHARED_VERSION_H #define __CARL9170_SHARED_VERSION_H #define CARL9170FW_VERSION_YEAR 11 -#define CARL9170FW_VERSION_MONTH 6 -#define CARL9170FW_VERSION_DAY 30 +#define CARL9170FW_VERSION_MONTH 8 +#define CARL9170FW_VERSION_DAY 15 #define CARL9170FW_VERSION_GIT "1.9.4" #endif /* __CARL9170_SHARED_VERSION_H */ |