From 0eb8365305d43bdfde9e064dec4d82c743fa5c38 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Mon, 11 Nov 2013 18:56:35 +0200 Subject: [PATCH] iwlwifi: mvm: add debugfs hook to take an mvm ref Support taking an mvm ref (and preventing D0i3) by writing '1' into the d0i3_refs debugfs file. The reference can be unref by writing 0 to the same file. Signed-off-by: Eliad Peller Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/debugfs.c | 33 ++++++++++++++++++++-- drivers/net/wireless/iwlwifi/mvm/mvm.h | 1 + 2 files changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/iwlwifi/mvm/debugfs.c index 2253d5b2a59c..c116765ebe42 100644 --- a/drivers/net/wireless/iwlwifi/mvm/debugfs.c +++ b/drivers/net/wireless/iwlwifi/mvm/debugfs.c @@ -862,10 +862,39 @@ static ssize_t iwl_dbgfs_d0i3_refs_read(struct file *file, PRINT_MVM_REF(IWL_MVM_REF_ROC); PRINT_MVM_REF(IWL_MVM_REF_P2P_CLIENT); PRINT_MVM_REF(IWL_MVM_REF_AP_IBSS); + PRINT_MVM_REF(IWL_MVM_REF_USER); return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } +static ssize_t iwl_dbgfs_d0i3_refs_write(struct iwl_mvm *mvm, char *buf, + size_t count, loff_t *ppos) +{ + unsigned long value; + int ret; + bool taken; + + ret = kstrtoul(buf, 10, &value); + if (ret < 0) + return ret; + + mutex_lock(&mvm->mutex); + + taken = test_bit(IWL_MVM_REF_USER, mvm->ref_bitmap); + if (value == 1 && !taken) + iwl_mvm_ref(mvm, IWL_MVM_REF_USER); + else if (value == 0 && taken) + iwl_mvm_unref(mvm, IWL_MVM_REF_USER); + else + ret = -EINVAL; + + mutex_unlock(&mvm->mutex); + + if (ret < 0) + return ret; + return count; +} + #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \ _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_mvm) #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ @@ -890,7 +919,7 @@ MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats); MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10); MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi, 10); MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain, 8); -MVM_DEBUGFS_READ_FILE_OPS(d0i3_refs); +MVM_DEBUGFS_READ_WRITE_FILE_OPS(d0i3_refs, 8); #ifdef CONFIG_IWLWIFI_BCAST_FILTERING MVM_DEBUGFS_READ_WRITE_FILE_OPS(bcast_filters, 256); @@ -922,7 +951,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir) MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR); MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir, S_IWUSR | S_IRUSR); - MVM_DEBUGFS_ADD_FILE(d0i3_refs, mvm->debugfs_dir, S_IRUSR); + MVM_DEBUGFS_ADD_FILE(d0i3_refs, mvm->debugfs_dir, S_IRUSR | S_IWUSR); #ifdef CONFIG_IWLWIFI_BCAST_FILTERING if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING) { diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h index f3966078935c..1f53adeeba8b 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h @@ -245,6 +245,7 @@ enum iwl_mvm_ref_type { IWL_MVM_REF_ROC, IWL_MVM_REF_P2P_CLIENT, IWL_MVM_REF_AP_IBSS, + IWL_MVM_REF_USER, IWL_MVM_REF_COUNT, }; -- 2.20.1