From 7abc4632bf1259a491188266a9aaa82ddeb55ff3 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 6 Aug 2013 18:28:26 +0200 Subject: [PATCH] iwlwifi: mvm: refactor resume from WoWLAN code To be able to add more logic to the resume code, refactor it a bit, moving some status checking/reporting logic into a new function. The locking becomes a bit odd (one of the new functions now unlocks the mutex) but this will be required to call new mac80211 APIs in there later. Reviewed-by: Luciano Coelho Signed-off-by: Johannes Berg --- drivers/net/wireless/iwlwifi/mvm/d3.c | 151 ++++++++++++++++++++-------------- 1 file changed, 88 insertions(+), 63 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c index ebf7f9468926..ec07f0abbc6f 100644 --- a/drivers/net/wireless/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/iwlwifi/mvm/d3.c @@ -1104,73 +1104,16 @@ int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) return __iwl_mvm_suspend(hw, wowlan, false); } -static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm, - struct ieee80211_vif *vif) +static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct iwl_wowlan_status *status) { - u32 base = mvm->error_event_table; - struct error_table_start { - /* cf. struct iwl_error_event_table */ - u32 valid; - u32 error_id; - } err_info; + struct sk_buff *pkt = NULL; struct cfg80211_wowlan_wakeup wakeup = { .pattern_idx = -1, }; struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup; - struct iwl_host_cmd cmd = { - .id = WOWLAN_GET_STATUSES, - .flags = CMD_SYNC | CMD_WANT_SKB, - }; - struct iwl_wowlan_status *status; - u32 reasons; - int ret, len; - struct sk_buff *pkt = NULL; - - iwl_trans_read_mem_bytes(mvm->trans, base, - &err_info, sizeof(err_info)); - - if (err_info.valid) { - IWL_INFO(mvm, "error table is valid (%d)\n", - err_info.valid); - if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { - wakeup.rfkill_release = true; - ieee80211_report_wowlan_wakeup(vif, &wakeup, - GFP_KERNEL); - } - return; - } - - /* only for tracing for now */ - ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL); - if (ret) - IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret); - - ret = iwl_mvm_send_cmd(mvm, &cmd); - if (ret) { - IWL_ERR(mvm, "failed to query status (%d)\n", ret); - return; - } - - /* RF-kill already asserted again... */ - if (!cmd.resp_pkt) - return; - - len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; - if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) { - IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); - goto out; - } - - status = (void *)cmd.resp_pkt->data; - - if (len - sizeof(struct iwl_cmd_header) != - sizeof(*status) + - ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) { - IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); - goto out; - } - - reasons = le32_to_cpu(status->wakeup_reasons); + u32 reasons = le32_to_cpu(status->wakeup_reasons); if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) { wakeup_report = NULL; @@ -1233,6 +1176,12 @@ static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm, pktsize -= hdrlen; if (ieee80211_has_protected(hdr->frame_control)) { + /* + * This is unlocked and using gtk_i(c)vlen, + * but since everything is under RTNL still + * that's not really a problem - changing + * it would be difficult. + */ if (is_multicast_ether_addr(hdr->addr1)) { ivlen = mvm->gtk_ivlen; icvlen += mvm->gtk_icvlen; @@ -1283,9 +1232,82 @@ static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm, report: ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); kfree_skb(pkt); +} - out: +/* releases the MVM mutex */ +static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + u32 base = mvm->error_event_table; + struct error_table_start { + /* cf. struct iwl_error_event_table */ + u32 valid; + u32 error_id; + } err_info; + struct iwl_host_cmd cmd = { + .id = WOWLAN_GET_STATUSES, + .flags = CMD_SYNC | CMD_WANT_SKB, + }; + struct iwl_wowlan_status *status; + int ret, len; + + iwl_trans_read_mem_bytes(mvm->trans, base, + &err_info, sizeof(err_info)); + + if (err_info.valid) { + IWL_INFO(mvm, "error table is valid (%d)\n", + err_info.valid); + if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { + struct cfg80211_wowlan_wakeup wakeup = { + .rfkill_release = true, + }; + ieee80211_report_wowlan_wakeup(vif, &wakeup, + GFP_KERNEL); + } + goto out_unlock; + } + + /* only for tracing for now */ + ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL); + if (ret) + IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret); + + ret = iwl_mvm_send_cmd(mvm, &cmd); + if (ret) { + IWL_ERR(mvm, "failed to query status (%d)\n", ret); + goto out_unlock; + } + + /* RF-kill already asserted again... */ + if (!cmd.resp_pkt) + goto out_unlock; + + len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; + if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) { + IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); + goto out_free_resp; + } + + status = (void *)cmd.resp_pkt->data; + + if (len - sizeof(struct iwl_cmd_header) != + sizeof(*status) + + ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) { + IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); + goto out_free_resp; + } + + /* now we have all the data we need, unlock to avoid mac80211 issues */ + mutex_unlock(&mvm->mutex); + + iwl_mvm_report_wakeup_reasons(mvm, vif, status); + iwl_free_resp(&cmd); + return; + + out_free_resp: iwl_free_resp(&cmd); + out_unlock: + mutex_unlock(&mvm->mutex); } static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm) @@ -1342,10 +1364,13 @@ static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test) iwl_mvm_read_d3_sram(mvm); iwl_mvm_query_wakeup_reasons(mvm, vif); + /* has unlocked the mutex, so skip that */ + goto out; out_unlock: mutex_unlock(&mvm->mutex); + out: if (!test && vif) ieee80211_resume_disconnect(vif); -- 2.11.0