From 229ea8e7b674eb5c9bc4f70d43df1bd02a79862a Mon Sep 17 00:00:00 2001 From: Minda Chen Date: Mon, 8 Jan 2024 19:06:05 +0800 Subject: [PATCH 028/116] PCI: microchip: Add event irqchip field to host port and add PLDA irqchip As PLDA dts binding doc(Documentation/devicetree/bindings/pci/ plda,xpressrich3-axi-common.yaml) showes, PLDA PCIe contains an interrupt controller. Microchip PolarFire PCIE event IRQs includes PLDA interrupts and Polarfire their own interrupts. The interrupt irqchip ops includes ack/mask/unmask interrupt ops, which will write correct registers. Microchip Polarfire PCIe additional interrupts require to write Polarfire SoC self-defined registers. So Microchip PCIe event irqchip ops can not be re-used. To support PLDA its own event IRQ process, implements PLDA irqchip ops and add event irqchip field to struct pcie_plda_rp. Signed-off-by: Minda Chen Acked-by: Conor Dooley --- .../pci/controller/plda/pcie-microchip-host.c | 66 ++++++++++++++++++- drivers/pci/controller/plda/pcie-plda.h | 5 +- 2 files changed, 69 insertions(+), 2 deletions(-) --- a/drivers/pci/controller/plda/pcie-microchip-host.c +++ b/drivers/pci/controller/plda/pcie-microchip-host.c @@ -770,6 +770,64 @@ static struct irq_chip mc_event_irq_chip .irq_unmask = mc_unmask_event_irq, }; +static u32 plda_hwirq_to_mask(int hwirq) +{ + u32 mask; + + /* hwirq 23 - 0 are the same with register */ + if (hwirq < EVENT_PM_MSI_INT_INTX) + mask = BIT(hwirq); + else if (hwirq == EVENT_PM_MSI_INT_INTX) + mask = PM_MSI_INT_INTX_MASK; + else + mask = BIT(hwirq + PCI_NUM_INTX - 1); + + return mask; +} + +static void plda_ack_event_irq(struct irq_data *data) +{ + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); + + writel_relaxed(plda_hwirq_to_mask(data->hwirq), + port->bridge_addr + ISTATUS_LOCAL); +} + +static void plda_mask_event_irq(struct irq_data *data) +{ + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); + u32 mask, val; + + mask = plda_hwirq_to_mask(data->hwirq); + + raw_spin_lock(&port->lock); + val = readl_relaxed(port->bridge_addr + IMASK_LOCAL); + val &= ~mask; + writel_relaxed(val, port->bridge_addr + IMASK_LOCAL); + raw_spin_unlock(&port->lock); +} + +static void plda_unmask_event_irq(struct irq_data *data) +{ + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data); + u32 mask, val; + + mask = plda_hwirq_to_mask(data->hwirq); + + raw_spin_lock(&port->lock); + val = readl_relaxed(port->bridge_addr + IMASK_LOCAL); + val |= mask; + writel_relaxed(val, port->bridge_addr + IMASK_LOCAL); + raw_spin_unlock(&port->lock); +} + +static struct irq_chip plda_event_irq_chip = { + .name = "PLDA PCIe EVENT", + .irq_ack = plda_ack_event_irq, + .irq_mask = plda_mask_event_irq, + .irq_unmask = plda_unmask_event_irq, +}; + static const struct plda_event_ops plda_event_ops = { .get_events = plda_get_events, }; @@ -777,7 +835,9 @@ static const struct plda_event_ops plda_ static int plda_pcie_event_map(struct irq_domain *domain, unsigned int irq, irq_hw_number_t hwirq) { - irq_set_chip_and_handler(irq, &mc_event_irq_chip, handle_level_irq); + struct plda_pcie_rp *port = (void *)domain->host_data; + + irq_set_chip_and_handler(irq, port->event_irq_chip, handle_level_irq); irq_set_chip_data(irq, domain->host_data); return 0; @@ -962,6 +1022,9 @@ static int plda_init_interrupts(struct p if (!port->event_ops) port->event_ops = &plda_event_ops; + if (!port->event_irq_chip) + port->event_irq_chip = &plda_event_irq_chip; + ret = plda_pcie_init_irq_domains(port); if (ret) { dev_err(dev, "failed creating IRQ domains\n"); @@ -1039,6 +1102,7 @@ static int mc_platform_init(struct pci_c return ret; port->plda.event_ops = &mc_event_ops; + port->plda.event_irq_chip = &mc_event_irq_chip; /* Address translation is up; safe to enable interrupts */ ret = plda_init_interrupts(pdev, &port->plda, &mc_event); --- a/drivers/pci/controller/plda/pcie-plda.h +++ b/drivers/pci/controller/plda/pcie-plda.h @@ -107,7 +107,9 @@ enum plda_int_event { #define PLDA_NUM_DMA_EVENTS 16 -#define PLDA_MAX_INT_NUM (PLDA_NUM_DMA_EVENTS + PLDA_INT_EVENT_NUM) +#define EVENT_PM_MSI_INT_INTX (PLDA_NUM_DMA_EVENTS + PLDA_INTX) +#define EVENT_PM_MSI_INT_MSI (PLDA_NUM_DMA_EVENTS + PLDA_MSI) +#define PLDA_MAX_EVENT_NUM (PLDA_NUM_DMA_EVENTS + PLDA_INT_EVENT_NUM) /* * PLDA interrupt register @@ -155,6 +157,7 @@ struct plda_pcie_rp { raw_spinlock_t lock; struct plda_msi msi; const struct plda_event_ops *event_ops; + const struct irq_chip *event_irq_chip; void __iomem *bridge_addr; int num_events; };