From 818bdd16b229919cfd07447d261154a1343871e1 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Tue, 16 Jul 2013 09:38:57 +0200 Subject: [PATCH] ath10k: defer hw setup to start/stop mac80211 hooks This fixes suspend-to-disk. The hardware is now re-initialized upon freeze/thaw properly. This also makes suspend/resume re-initialize the hardware as WoWLAN support is not done yet. With some little work it should be possible to support hw reconfiguration for hw/fw recovery. HW must be initialized once before registering to mac80211 because FW determinates what hw capabilities can be advertised. Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/core.c | 46 ++++++++++++++++----- drivers/net/wireless/ath/ath10k/mac.c | 56 ++++++++++++++++++++------ drivers/net/wireless/ath/ath10k/pci.c | 11 +---- 3 files changed, 81 insertions(+), 32 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index 0e4a704516f7..1d4c24583f1d 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -601,6 +601,7 @@ err_wmi_detach: err: return status; } +EXPORT_SYMBOL(ath10k_core_start); void ath10k_core_stop(struct ath10k *ar) { @@ -608,18 +609,49 @@ void ath10k_core_stop(struct ath10k *ar) ath10k_htt_detach(&ar->htt); ath10k_wmi_detach(ar); } +EXPORT_SYMBOL(ath10k_core_stop); + +/* mac80211 manages fw/hw initialization through start/stop hooks. However in + * order to know what hw capabilities should be advertised to mac80211 it is + * necessary to load the firmware (and tear it down immediately since start + * hook will try to init it again) before registering */ +static int ath10k_core_probe_fw(struct ath10k *ar) +{ + int ret; + + ret = ath10k_hif_power_up(ar); + if (ret) { + ath10k_err("could not start pci hif (%d)\n", ret); + return ret; + } + + ret = ath10k_core_start(ar); + if (ret) { + ath10k_err("could not init core (%d)\n", ret); + ath10k_hif_power_down(ar); + return ret; + } + + ath10k_core_stop(ar); + ath10k_hif_power_down(ar); + return 0; +} int ath10k_core_register(struct ath10k *ar) { int status; - status = ath10k_core_start(ar); - if (status) - goto err; + status = ath10k_core_probe_fw(ar); + if (status) { + ath10k_err("could not probe fw (%d)\n", status); + return status; + } status = ath10k_mac_register(ar); - if (status) - goto err_core_stop; + if (status) { + ath10k_err("could not register to mac80211 (%d)\n", status); + return status; + } status = ath10k_debug_create(ar); if (status) { @@ -631,9 +663,6 @@ int ath10k_core_register(struct ath10k *ar) err_unregister_mac: ath10k_mac_unregister(ar); -err_core_stop: - ath10k_core_stop(ar); -err: return status; } EXPORT_SYMBOL(ath10k_core_register); @@ -644,7 +673,6 @@ void ath10k_core_unregister(struct ath10k *ar) * Otherwise we will fail to submit commands to FW and mac80211 will be * unhappy about callback failures. */ ath10k_mac_unregister(ar); - ath10k_core_stop(ar); } EXPORT_SYMBOL(ath10k_core_unregister); diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index b9663e94dba5..2dfd446251b1 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -1738,13 +1738,52 @@ static void ath10k_tx(struct ieee80211_hw *hw, /* * Initialize various parameters with default vaules. */ +static void ath10k_halt(struct ath10k *ar) +{ + lockdep_assert_held(&ar->conf_mutex); + + del_timer_sync(&ar->scan.timeout); + ath10k_offchan_tx_purge(ar); + ath10k_peer_cleanup_all(ar); + ath10k_core_stop(ar); + ath10k_hif_power_down(ar); + + spin_lock_bh(&ar->data_lock); + if (ar->scan.in_progress) { + del_timer(&ar->scan.timeout); + ar->scan.in_progress = false; + ieee80211_scan_completed(ar->hw, true); + } + spin_unlock_bh(&ar->data_lock); +} + static int ath10k_start(struct ieee80211_hw *hw) { struct ath10k *ar = hw->priv; - int ret; + int ret = 0; mutex_lock(&ar->conf_mutex); + if (ar->state != ATH10K_STATE_OFF) { + ret = -EINVAL; + goto exit; + } + + ret = ath10k_hif_power_up(ar); + if (ret) { + ath10k_err("could not init hif (%d)\n", ret); + ar->state = ATH10K_STATE_OFF; + goto exit; + } + + ret = ath10k_core_start(ar); + if (ret) { + ath10k_err("could not init core (%d)\n", ret); + ath10k_hif_power_down(ar); + ar->state = ATH10K_STATE_OFF; + goto exit; + } + ret = ath10k_wmi_pdev_set_param(ar, WMI_PDEV_PARAM_PMF_QOS, 1); if (ret) ath10k_warn("could not enable WMI_PDEV_PARAM_PMF_QOS (%d)\n", @@ -1755,9 +1794,9 @@ static int ath10k_start(struct ieee80211_hw *hw) ath10k_warn("could not init WMI_PDEV_PARAM_DYNAMIC_BW (%d)\n", ret); - ar->state = ATH10K_STATE_ON; ath10k_regd_update(ar); +exit: mutex_unlock(&ar->conf_mutex); return 0; } @@ -1767,17 +1806,8 @@ static void ath10k_stop(struct ieee80211_hw *hw) struct ath10k *ar = hw->priv; mutex_lock(&ar->conf_mutex); - del_timer_sync(&ar->scan.timeout); - ath10k_offchan_tx_purge(ar); - ath10k_peer_cleanup_all(ar); - - spin_lock_bh(&ar->data_lock); - if (ar->scan.in_progress) { - del_timer(&ar->scan.timeout); - ar->scan.in_progress = false; - ieee80211_scan_completed(ar->hw, true); - } - spin_unlock_bh(&ar->data_lock); + if (ar->state == ATH10K_STATE_ON) + ath10k_halt(ar); ar->state = ATH10K_STATE_OFF; mutex_unlock(&ar->conf_mutex); diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 75f5427bb416..bfe856166bb0 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -2362,22 +2362,14 @@ static int ath10k_pci_probe(struct pci_dev *pdev, goto err_iomap; } - ret = ath10k_pci_hif_power_up(ar); - if (ret) { - ath10k_err("could not start pci hif (%d)\n", ret); - goto err_intr; - } - ret = ath10k_core_register(ar); if (ret) { ath10k_err("could not register driver core (%d)\n", ret); - goto err_hif; + goto err_intr; } return 0; -err_hif: - ath10k_pci_hif_power_down(ar); err_intr: ath10k_pci_stop_intr(ar); err_iomap: @@ -2416,7 +2408,6 @@ static void ath10k_pci_remove(struct pci_dev *pdev) tasklet_kill(&ar_pci->msi_fw_err); ath10k_core_unregister(ar); - ath10k_pci_hif_power_down(ar); ath10k_pci_stop_intr(ar); pci_set_drvdata(pdev, NULL); -- 2.20.1