Return-path: Received: from mail-ee0-f51.google.com ([74.125.83.51]:58681 "EHLO mail-ee0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753931Ab3LaRQH (ORCPT ); Tue, 31 Dec 2013 12:16:07 -0500 Received: by mail-ee0-f51.google.com with SMTP id b15so5600274eek.24 for ; Tue, 31 Dec 2013 09:16:06 -0800 (PST) From: Emmanuel Grumbach To: linux-wireless@vger.kernel.org Cc: Emmanuel Grumbach Subject: [PATCH 02/28] iwlwifi: pcie: track interrupt mask in SW Date: Tue, 31 Dec 2013 19:15:31 +0200 Message-Id: <1388510157-23345-2-git-send-email-egrumbach@gmail.com> (sfid-20131231_183435_816930_9AE8C14A) In-Reply-To: <52C2FB68.2010708@gmail.com> References: <52C2FB68.2010708@gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Emmanuel Grumbach Track the interrupt mask in software, making it exactly what is configured in the interrupt mask register in the hardware. This allows not to access the register from the interrupt handler. This was the case for ICT interrupt already, but not for non-ICT interrupt. Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/internal.h | 6 +++++- drivers/net/wireless/iwlwifi/pcie/rx.c | 13 ++++++------- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/internal.h b/drivers/net/wireless/iwlwifi/pcie/internal.h index 674c75b..53c5237 100644 --- a/drivers/net/wireless/iwlwifi/pcie/internal.h +++ b/drivers/net/wireless/iwlwifi/pcie/internal.h @@ -397,13 +397,17 @@ static inline void iwl_enable_interrupts(struct iwl_trans *trans) IWL_DEBUG_ISR(trans, "Enabling interrupts\n"); set_bit(STATUS_INT_ENABLED, &trans->status); + trans_pcie->inta_mask = CSR_INI_SET_MASK; iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); } static inline void iwl_enable_rfkill_int(struct iwl_trans *trans) { + struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n"); - iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL); + trans_pcie->inta_mask = CSR_INT_BIT_RF_KILL; + iwl_write32(trans, CSR_INT_MASK, trans_pcie->inta_mask); } static inline void iwl_wake_queue(struct iwl_trans *trans, diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c index b3e6564..7e4836f 100644 --- a/drivers/net/wireless/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/iwlwifi/pcie/rx.c @@ -1115,7 +1115,7 @@ static irqreturn_t iwl_pcie_isr(int irq, void *data) { struct iwl_trans *trans = data; struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); - u32 inta, inta_mask; + u32 inta; lockdep_assert_held(&trans_pcie->irq_lock); @@ -1125,18 +1125,17 @@ static irqreturn_t iwl_pcie_isr(int irq, void *data) * back-to-back ISRs and sporadic interrupts from our NIC. * If we have something to service, the irq thread will re-enable ints. * If we *don't* have something, we'll re-enable before leaving here. */ - inta_mask = iwl_read32(trans, CSR_INT_MASK); iwl_write32(trans, CSR_INT_MASK, 0x00000000); /* Discover which interrupts are active/pending */ inta = iwl_read32(trans, CSR_INT); - if (inta & (~inta_mask)) { + if (inta & (~trans_pcie->inta_mask)) { IWL_DEBUG_ISR(trans, "We got a masked interrupt (0x%08x)...Ack and ignore\n", - inta & (~inta_mask)); - iwl_write32(trans, CSR_INT, inta & (~inta_mask)); - inta &= inta_mask; + inta & (~trans_pcie->inta_mask)); + iwl_write32(trans, CSR_INT, inta & (~trans_pcie->inta_mask)); + inta &= trans_pcie->inta_mask; } /* Ignore interrupt if there's nothing in NIC to service. @@ -1166,7 +1165,7 @@ static irqreturn_t iwl_pcie_isr(int irq, void *data) if (iwl_have_debug_level(IWL_DL_ISR)) IWL_DEBUG_ISR(trans, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", - inta, inta_mask, + inta, trans_pcie->inta_mask, iwl_read32(trans, CSR_FH_INT_STATUS)); trans_pcie->inta |= inta; -- 1.7.9.5