From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kiran Gunda Subject: [PATCH V1 05/15] spmi: pmic-arb: cleanup unrequested irqs Date: Tue, 30 May 2017 18:08:53 +0530 Message-ID: <1496147943-25822-6-git-send-email-kgunda@codeaurora.org> References: <1496147943-25822-1-git-send-email-kgunda@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:57022 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751556AbdE3MkK (ORCPT ); Tue, 30 May 2017 08:40:10 -0400 In-Reply-To: <1496147943-25822-1-git-send-email-kgunda@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: Kiran Gunda , Abhijeet Dharmapurikar , Subbaraman Narayanamurthy , Christophe JAILLET , David Collins , linux-kernel@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, adharmap@quicinc.com, aghayal@qti.qualcomm.com, sboyd@codeaurora.org From: Abhijeet Dharmapurikar We see a unmapped irqs trigger right around bootup. This could likely be because the bootloader exited leaving the interrupts in an unknown or unhandled state. Ack and mask the interrupt if one is found. A request_irq later will unmask it and also setup proper mapping structures. Also the current driver ensures that no read/write transaction is in progress while it makes changes to the interrupt regions. This is not necessary because read/writes over spmi and arbiter interrupt control are independent operations. Hence, remove the synchronized accesses to interrupt region. Signed-off-by: Abhijeet Dharmapurikar Signed-off-by: Kiran Gunda --- drivers/spmi/spmi-pmic-arb.c | 101 ++++++++++++++++++------------------------- 1 file changed, 43 insertions(+), 58 deletions(-) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 6320f1f..0a5728c 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -98,6 +98,11 @@ enum pmic_arb_cmd_op_code { struct pmic_arb_ver_ops; +struct apid_data { + u16 ppid; + u8 owner; +}; + /** * spmi_pmic_arb - SPMI PMIC Arbiter object * @@ -115,7 +120,6 @@ enum pmic_arb_cmd_op_code { * @mapping_table: in-memory copy of PPID -> APID mapping table. * @domain: irq domain object for PMIC IRQ domain * @spmic: SPMI controller object - * @apid_to_ppid: in-memory copy of APID -> PPID mapping table. * @ver_ops: version dependent operations. * @ppid_to_apid in-memory copy of PPID -> channel (APID) mapping table. * v2 only. @@ -138,11 +142,10 @@ struct spmi_pmic_arb { DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS); struct irq_domain *domain; struct spmi_controller *spmic; - u16 *apid_to_ppid; const struct pmic_arb_ver_ops *ver_ops; u16 *ppid_to_apid; u16 last_apid; - u8 *apid_to_owner; + struct apid_data apid_data[PMIC_ARB_MAX_PERIPHS]; }; /** @@ -482,6 +485,28 @@ static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len) d->irq); } +static void cleanup_irq(struct spmi_pmic_arb *pa, u8 apid, int id) +{ + u16 ppid = pa->apid_data[apid].ppid; + u8 sid = ppid >> 8; + u8 per = ppid & 0xFF; + u8 irq_mask = BIT(id); + + writel_relaxed(irq_mask, pa->intr + pa->ver_ops->irq_clear(apid)); + + if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid, + (per << 8) + QPNPINT_REG_LATCHED_CLR, &irq_mask, 1)) + dev_err_ratelimited(&pa->spmic->dev, + "failed to ack irq_mask = 0x%x for ppid = %x\n", + irq_mask, ppid); + + if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid, + (per << 8) + QPNPINT_REG_EN_CLR, &irq_mask, 1)) + dev_err_ratelimited(&pa->spmic->dev, + "failed to ack irq_mask = 0x%x for ppid = %x\n", + irq_mask, ppid); +} + static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid) { unsigned int irq; @@ -493,9 +518,13 @@ static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid) id = ffs(status) - 1; status &= ~BIT(id); irq = irq_find_mapping(pa->domain, - pa->apid_to_ppid[apid] << 16 + pa->apid_data[apid].ppid << 16 | id << 8 | apid); + if (irq == 0) { + cleanup_irq(pa, apid, id); + continue; + } generic_handle_irq(irq); } } @@ -530,12 +559,9 @@ static void qpnpint_irq_ack(struct irq_data *d) struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); u8 irq = d->hwirq >> 8; u8 apid = d->hwirq; - unsigned long flags; u8 data; - raw_spin_lock_irqsave(&pa->lock, flags); writel_relaxed(BIT(irq), pa->intr + pa->ver_ops->irq_clear(apid)); - raw_spin_unlock_irqrestore(&pa->lock, flags); data = BIT(irq); qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1); @@ -543,23 +569,9 @@ static void qpnpint_irq_ack(struct irq_data *d) static void qpnpint_irq_mask(struct irq_data *d) { - struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); u8 irq = d->hwirq >> 8; - u8 apid = d->hwirq; - unsigned long flags; - u32 status; - u8 data; + u8 data = BIT(irq); - raw_spin_lock_irqsave(&pa->lock, flags); - status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid)); - if (status & SPMI_PIC_ACC_ENABLE_BIT) { - status = status & ~SPMI_PIC_ACC_ENABLE_BIT; - writel_relaxed(status, pa->intr + - pa->ver_ops->acc_enable(apid)); - } - raw_spin_unlock_irqrestore(&pa->lock, flags); - - data = BIT(irq); qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1); } @@ -568,20 +580,12 @@ static void qpnpint_irq_unmask(struct irq_data *d) struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); u8 irq = d->hwirq >> 8; u8 apid = d->hwirq; - unsigned long flags; - u32 status; - u8 data; + u8 data = BIT(irq); - raw_spin_lock_irqsave(&pa->lock, flags); - status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid)); - if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) { - writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT, - pa->intr + pa->ver_ops->acc_enable(apid)); - } - raw_spin_unlock_irqrestore(&pa->lock, flags); + writel_relaxed(SPMI_PIC_ACC_ENABLE_BIT, + pa->intr + pa->ver_ops->acc_enable(apid)); - data = BIT(irq); - qpnpint_spmi_write(d, QPNPINT_REG_EN_SET, &data, 1); + qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1); } static void qpnpint_irq_enable(struct irq_data *d) @@ -755,7 +759,7 @@ static int qpnpint_irq_domain_map(struct irq_domain *d, *apid = SPMI_MAPPING_BIT_IS_1_RESULT(data); pa->ppid_to_apid[ppid] = *apid | PMIC_ARB_CHAN_VALID; - pa->apid_to_ppid[*apid] = ppid; + pa->apid_data[*apid].ppid = ppid; return 0; } } else { @@ -765,7 +769,7 @@ static int qpnpint_irq_domain_map(struct irq_domain *d, *apid = SPMI_MAPPING_BIT_IS_0_RESULT(data); pa->ppid_to_apid[ppid] = *apid | PMIC_ARB_CHAN_VALID; - pa->apid_to_ppid[*apid] = ppid; + pa->apid_data[*apid].ppid = ppid; return 0; } } @@ -802,7 +806,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid) for (apid = pa->last_apid; apid < pa->max_periph; apid++) { regval = readl_relaxed(pa->cnfg + SPMI_OWNERSHIP_TABLE_REG(apid)); - pa->apid_to_owner[apid] = SPMI_OWNERSHIP_PERIPH2OWNER(regval); + pa->apid_data[apid].owner = SPMI_OWNERSHIP_PERIPH2OWNER(regval); offset = PMIC_ARB_REG_CHNL(apid); if (offset >= pa->core_size) @@ -814,7 +818,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid) id = (regval >> 8) & PMIC_ARB_PPID_MASK; pa->ppid_to_apid[id] = apid | PMIC_ARB_CHAN_VALID; - pa->apid_to_ppid[apid] = id; + pa->apid_data[apid].ppid = id; if (id == ppid) { apid |= PMIC_ARB_CHAN_VALID; break; @@ -846,7 +850,6 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid) pmic_arb_mode_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode) { u8 apid; - u8 owner; int rc; rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid); @@ -856,8 +859,7 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid) *mode = 0; *mode |= S_IRUSR; - owner = pa->apid_to_owner[apid]; - if (owner == pa->ee) + if (pa->ee == pa->apid_data[apid].owner) *mode |= S_IWUSR; return 0; } @@ -1028,15 +1030,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) err = -ENOMEM; goto err_put_ctrl; } - - pa->apid_to_owner = devm_kcalloc(&ctrl->dev, - pa->max_periph, - sizeof(*pa->apid_to_owner), - GFP_KERNEL); - if (!pa->apid_to_owner) { - err = -ENOMEM; - goto err_put_ctrl; - } } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); @@ -1088,14 +1081,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev) pa->ee = ee; - pa->apid_to_ppid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS, - sizeof(*pa->apid_to_ppid), - GFP_KERNEL); - if (!pa->apid_to_ppid) { - err = -ENOMEM; - goto err_put_ctrl; - } - pa->mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS - 1, sizeof(*pa->mapping_table), GFP_KERNEL); if (!pa->mapping_table) { -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation --