From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mga09.intel.com ([134.134.136.24]:20040 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751453Ab3LKIfK (ORCPT ); Wed, 11 Dec 2013 03:35:10 -0500 From: Emmanuel Grumbach To: linux-rt-users@vger.kernel.org Cc: linux-wireless@vger.kernel.org, Emmanuel Grumbach Subject: [RFC 09/10] iwlwifi: pcie: move interrupt prints to the common handler Date: Wed, 11 Dec 2013 10:33:45 +0200 Message-Id: <1386750826-25219-11-git-send-email-emmanuel.grumbach@intel.com> (sfid-20131211_093522_949909_7184D2EE) In-Reply-To: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> References: <1386750826-25219-1-git-send-email-emmanuel.grumbach@intel.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: Handling interrupt with no cause and printing logs doesn't need to be ICT / non-ICT specific move this to the common code. Change-Id: I741894a8079faf0bf192a63ea5f40de5d08c433c Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/pcie/rx.c | 90 ++++++++++++---------------------- 1 file changed, 30 insertions(+), 60 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c index 3f247da..f25e6bb 100644 --- a/drivers/net/wireless/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/iwlwifi/pcie/rx.c @@ -819,43 +819,6 @@ static u32 iwl_pcie_int_cause_non_ict(struct iwl_trans *trans) /* Discover which interrupts are active/pending */ inta = iwl_read32(trans, CSR_INT); - if (inta & (~trans_pcie->inta_mask)) { - IWL_DEBUG_ISR(trans, - "We got a masked interrupt (0x%08x)...Ack and ignore\n", - 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. - * This may be due to IRQ shared with another device, - * or due to sporadic interrupts thrown from our NIC. */ - if (!inta) { - IWL_DEBUG_ISR(trans, "Ignore interrupt, inta == 0\n"); - /* - * Re-enable interrupts here since we don't have anything to - * service, but only in case the handler won't run. Note that - * the handler can be scheduled because of a previous - * interrupt. - */ - if (test_bit(STATUS_INT_ENABLED, &trans->status) && !inta) - iwl_enable_interrupts(trans); - return inta; - } - - if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { - /* Hardware disappeared. It might have already raised - * an interrupt */ - IWL_WARN(trans, "HARDWARE GONE?? INTA == 0x%08x\n", inta); - return inta; - } - - if (iwl_have_debug_level(IWL_DL_ISR)) - IWL_DEBUG_ISR(trans, - "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", - inta, trans_pcie->inta_mask, - iwl_read32(trans, CSR_FH_INT_STATUS)); - /* the thread will service interrupts and re-enable them */ return inta; } @@ -887,10 +850,8 @@ static u32 iwl_pcie_int_cause_ict(struct iwl_trans *trans) * or due to sporadic interrupts thrown from our NIC. */ read = le32_to_cpu(trans_pcie->ict_tbl[trans_pcie->ict_index]); trace_iwlwifi_dev_ict_read(trans->dev, trans_pcie->ict_index, read); - if (!read) { - IWL_DEBUG_ISR(trans, "Ignore interrupt, inta == 0\n"); - goto none; - } + if (!read) + return 0; /* * Collect all entries up to the first 0, starting from ict_index; @@ -924,25 +885,6 @@ static u32 iwl_pcie_int_cause_ict(struct iwl_trans *trans) val |= 0x8000; inta = (0xff & val) | ((0xff00 & val) << 16); - IWL_DEBUG_ISR(trans, "ISR inta 0x%08x, enabled(sw) 0x%08x ict 0x%08x\n", - inta, trans_pcie->inta_mask, val); - if (iwl_have_debug_level(IWL_DL_ISR)) - IWL_DEBUG_ISR(trans, "enabled(hw) 0x%08x\n", - iwl_read32(trans, CSR_INT_MASK)); - - inta &= trans_pcie->inta_mask; - - /* iwl_pcie_tasklet() will service interrupts and re-enable them */ - if (likely(inta)) - return inta; - - none: - /* re-enable interrupts here since we don't have anything to service. - * only Re-enable if disabled by irq. - */ - if (test_bit(STATUS_INT_ENABLED, &trans->status) && !inta) - iwl_enable_interrupts(trans); - return inta; } @@ -968,11 +910,39 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id) else inta = iwl_pcie_int_cause_non_ict(trans); + if (iwl_have_debug_level(IWL_DL_ISR)) { + IWL_DEBUG_ISR(trans, + "ISR inta 0x%08x, enabled 0x%08x(sw), enabled(hw) 0x%08x, fh 0x%08x\n", + inta, trans_pcie->inta_mask, + iwl_read32(trans, CSR_INT_MASK), + iwl_read32(trans, CSR_FH_INT_STATUS)); + if (inta & (~trans_pcie->inta_mask)) + IWL_DEBUG_ISR(trans, + "We got a masked interrupt (0x%08x)\n", + inta & (~trans_pcie->inta_mask)); + } + + inta &= trans_pcie->inta_mask; + + /* + * Ignore interrupt if there's nothing in NIC to service. + * This may be due to IRQ shared with another device, + * or due to sporadic interrupts thrown from our NIC.\ + */ if (!inta) { + IWL_DEBUG_ISR(trans, "Ignore interrupt, inta == 0\n"); + /* Re-enable interrupts here since we don't have anything to service */ + if (test_bit(STATUS_INT_ENABLED, &trans->status)) + iwl_enable_interrupts(trans); spin_unlock_irqrestore(&trans_pcie->irq_lock, flags); return IRQ_NONE; } + if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) { + /* Hardware disappeared. It might have already raised an interrupt */ + IWL_WARN(trans, "HARDWARE GONE?? INTA == 0x%08x\n", inta); + } + /* Ack/clear/reset pending uCode interrupts. * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS, */ -- 1.8.3.2