From ce44d1ff463dcf812b43c71a0e16859e3451bc1e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 23 Jun 2024 17:19:04 +0200 Subject: [PATCH] irqchip/irq-mvebu-icu: Remove platform MSI leftovers All related domains provide MSI parent functionality, so the fallback code to the original platform MSI implementation is not longer required. Signed-off-by: Thomas Gleixner Signed-off-by: Anna-Maria Behnsen Signed-off-by: Shivamurthy Shastri Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/r/20240623142235.881677325@linutronix.de --- drivers/irqchip/irq-mvebu-icu.c | 212 +------------------------------- 1 file changed, 6 insertions(+), 206 deletions(-) diff --git a/drivers/irqchip/irq-mvebu-icu.c b/drivers/irqchip/irq-mvebu-icu.c index 2a210cd9482e..b337f6c05f18 100644 --- a/drivers/irqchip/irq-mvebu-icu.c +++ b/drivers/irqchip/irq-mvebu-icu.c @@ -129,196 +129,6 @@ static void mvebu_icu_init(struct mvebu_icu *icu, writel_relaxed(msg[1].address_lo, icu->base + subset->offset_clr_al); } -/* Start of area to be removed once all parent chips provide MSI parent */ - -struct mvebu_icu_irq_data { - struct mvebu_icu *icu; - unsigned int icu_group; - unsigned int type; -}; - -static void mvebu_icu_write_msg(struct msi_desc *desc, struct msi_msg *msg) -{ - struct irq_data *d = irq_get_irq_data(desc->irq); - struct mvebu_icu_msi_data *msi_data = platform_msi_get_host_data(d->domain); - struct mvebu_icu_irq_data *icu_irqd = d->chip_data; - struct mvebu_icu *icu = icu_irqd->icu; - unsigned int icu_int; - - if (msg->address_lo || msg->address_hi) { - /* One off initialization per domain */ - mvebu_icu_init(icu, msi_data, msg); - /* Configure the ICU with irq number & type */ - icu_int = msg->data | ICU_INT_ENABLE; - if (icu_irqd->type & IRQ_TYPE_EDGE_RISING) - icu_int |= ICU_IS_EDGE; - icu_int |= icu_irqd->icu_group << ICU_GROUP_SHIFT; - } else { - /* De-configure the ICU */ - icu_int = 0; - } - - writel_relaxed(icu_int, icu->base + ICU_INT_CFG(d->hwirq)); - - /* - * The SATA unit has 2 ports, and a dedicated ICU entry per - * port. The ahci sata driver supports only one irq interrupt - * per SATA unit. To solve this conflict, we configure the 2 - * SATA wired interrupts in the south bridge into 1 GIC - * interrupt in the north bridge. Even if only a single port - * is enabled, if sata node is enabled, both interrupts are - * configured (regardless of which port is actually in use). - */ - if (d->hwirq == ICU_SATA0_ICU_ID || d->hwirq == ICU_SATA1_ICU_ID) { - writel_relaxed(icu_int, - icu->base + ICU_INT_CFG(ICU_SATA0_ICU_ID)); - writel_relaxed(icu_int, - icu->base + ICU_INT_CFG(ICU_SATA1_ICU_ID)); - } -} - -static struct irq_chip mvebu_icu_nsr_chip = { - .name = "ICU-NSR", - .irq_mask = irq_chip_mask_parent, - .irq_unmask = irq_chip_unmask_parent, - .irq_eoi = irq_chip_eoi_parent, - .irq_set_type = irq_chip_set_type_parent, - .irq_set_affinity = irq_chip_set_affinity_parent, -}; - -static struct irq_chip mvebu_icu_sei_chip = { - .name = "ICU-SEI", - .irq_ack = irq_chip_ack_parent, - .irq_mask = irq_chip_mask_parent, - .irq_unmask = irq_chip_unmask_parent, - .irq_set_type = irq_chip_set_type_parent, - .irq_set_affinity = irq_chip_set_affinity_parent, -}; - -static int -mvebu_icu_irq_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec, - unsigned long *hwirq, unsigned int *type) -{ - unsigned int param_count = static_branch_unlikely(&legacy_bindings) ? 3 : 2; - struct mvebu_icu_msi_data *msi_data = platform_msi_get_host_data(d); - struct mvebu_icu *icu = msi_data->icu; - - /* Check the count of the parameters in dt */ - if (WARN_ON(fwspec->param_count != param_count)) { - dev_err(icu->dev, "wrong ICU parameter count %d\n", - fwspec->param_count); - return -EINVAL; - } - - if (static_branch_unlikely(&legacy_bindings)) { - *hwirq = fwspec->param[1]; - *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; - if (fwspec->param[0] != ICU_GRP_NSR) { - dev_err(icu->dev, "wrong ICU group type %x\n", - fwspec->param[0]); - return -EINVAL; - } - } else { - *hwirq = fwspec->param[0]; - *type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; - - /* - * The ICU receives level interrupts. While the NSR are also - * level interrupts, SEI are edge interrupts. Force the type - * here in this case. Please note that this makes the interrupt - * handling unreliable. - */ - if (msi_data->subset_data->icu_group == ICU_GRP_SEI) - *type = IRQ_TYPE_EDGE_RISING; - } - - if (*hwirq >= ICU_MAX_IRQS) { - dev_err(icu->dev, "invalid interrupt number %ld\n", *hwirq); - return -EINVAL; - } - - return 0; -} - -static int -mvebu_icu_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs, void *args) -{ - int err; - unsigned long hwirq; - struct irq_fwspec *fwspec = args; - struct mvebu_icu_msi_data *msi_data = platform_msi_get_host_data(domain); - struct mvebu_icu *icu = msi_data->icu; - struct mvebu_icu_irq_data *icu_irqd; - struct irq_chip *chip = &mvebu_icu_nsr_chip; - - icu_irqd = kmalloc(sizeof(*icu_irqd), GFP_KERNEL); - if (!icu_irqd) - return -ENOMEM; - - err = mvebu_icu_irq_domain_translate(domain, fwspec, &hwirq, - &icu_irqd->type); - if (err) { - dev_err(icu->dev, "failed to translate ICU parameters\n"); - goto free_irqd; - } - - if (static_branch_unlikely(&legacy_bindings)) - icu_irqd->icu_group = fwspec->param[0]; - else - icu_irqd->icu_group = msi_data->subset_data->icu_group; - icu_irqd->icu = icu; - - err = platform_msi_device_domain_alloc(domain, virq, nr_irqs); - if (err) { - dev_err(icu->dev, "failed to allocate ICU interrupt in parent domain\n"); - goto free_irqd; - } - - /* Make sure there is no interrupt left pending by the firmware */ - err = irq_set_irqchip_state(virq, IRQCHIP_STATE_PENDING, false); - if (err) - goto free_msi; - - if (icu_irqd->icu_group == ICU_GRP_SEI) - chip = &mvebu_icu_sei_chip; - - err = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, - chip, icu_irqd); - if (err) { - dev_err(icu->dev, "failed to set the data to IRQ domain\n"); - goto free_msi; - } - - return 0; - -free_msi: - platform_msi_device_domain_free(domain, virq, nr_irqs); -free_irqd: - kfree(icu_irqd); - return err; -} - -static void -mvebu_icu_irq_domain_free(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs) -{ - struct irq_data *d = irq_get_irq_data(virq); - struct mvebu_icu_irq_data *icu_irqd = d->chip_data; - - kfree(icu_irqd); - - platform_msi_device_domain_free(domain, virq, nr_irqs); -} - -static const struct irq_domain_ops mvebu_icu_domain_ops = { - .translate = mvebu_icu_irq_domain_translate, - .alloc = mvebu_icu_irq_domain_alloc, - .free = mvebu_icu_irq_domain_free, -}; - -/* End of removal area */ - static int mvebu_icu_msi_init(struct irq_domain *domain, struct msi_domain_info *info, unsigned int virq, irq_hw_number_t hwirq, msi_alloc_info_t *arg) { @@ -448,9 +258,10 @@ static const struct of_device_id mvebu_icu_subset_of_match[] = { static int mvebu_icu_subset_probe(struct platform_device *pdev) { + const struct msi_domain_template *tmpl; struct mvebu_icu_msi_data *msi_data; struct device *dev = &pdev->dev; - struct irq_domain *irq_domain; + bool sei; msi_data = devm_kzalloc(dev, sizeof(*msi_data), GFP_KERNEL); if (!msi_data) @@ -471,22 +282,11 @@ static int mvebu_icu_subset_probe(struct platform_device *pdev) if (!irq_domain_get_of_node(dev->msi.domain)) return -ENODEV; - if (irq_domain_is_msi_parent(dev->msi.domain)) { - bool sei = msi_data->subset_data->icu_group == ICU_GRP_SEI; - const struct msi_domain_template *tmpl; + sei = msi_data->subset_data->icu_group == ICU_GRP_SEI; + tmpl = sei ? &mvebu_icu_sei_msi_template : &mvebu_icu_nsr_msi_template; - tmpl = sei ? &mvebu_icu_sei_msi_template : &mvebu_icu_nsr_msi_template; - - if (!msi_create_device_irq_domain(dev, MSI_DEFAULT_DOMAIN, tmpl, - ICU_MAX_IRQS, NULL, msi_data)) - return -ENOMEM; - } - - irq_domain = platform_msi_create_device_tree_domain(dev, ICU_MAX_IRQS, - mvebu_icu_write_msg, - &mvebu_icu_domain_ops, - msi_data); - if (!irq_domain) { + if (!msi_create_device_irq_domain(dev, MSI_DEFAULT_DOMAIN, tmpl, + ICU_MAX_IRQS, NULL, msi_data)) { dev_err(dev, "Failed to create ICU MSI domain\n"); return -ENOMEM; }