| Message ID | 20210113114001.5804-5-jianjun.wang@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | PCI: mediatek: Add new generation controller support | expand |
On 2021-01-13 11:39, Jianjun Wang wrote: > Add INTx support for MediaTek Gen3 PCIe controller. > > Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com> > Acked-by: Ryder Lee <ryder.lee@mediatek.com> > --- > drivers/pci/controller/pcie-mediatek-gen3.c | 163 ++++++++++++++++++++ > 1 file changed, 163 insertions(+) > > diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c > b/drivers/pci/controller/pcie-mediatek-gen3.c > index c00ea7c167de..7979a2856c35 100644 > --- a/drivers/pci/controller/pcie-mediatek-gen3.c > +++ b/drivers/pci/controller/pcie-mediatek-gen3.c > @@ -9,6 +9,9 @@ > #include <linux/clk.h> > #include <linux/delay.h> > #include <linux/iopoll.h> > +#include <linux/irq.h> > +#include <linux/irqchip/chained_irq.h> > +#include <linux/irqdomain.h> > #include <linux/kernel.h> > #include <linux/module.h> > #include <linux/of_address.h> > @@ -49,6 +52,12 @@ > #define PCIE_LINK_STATUS_REG 0x154 > #define PCIE_PORT_LINKUP BIT(8) > > +#define PCIE_INT_ENABLE_REG 0x180 > +#define PCIE_INTX_SHIFT 24 > +#define PCIE_INTX_MASK GENMASK(27, 24) I guess this '24' is actually PCIE_INTX_SHIFT? In this case, please write it as GENMASK(PCIE_INTX_SHIFT + PCI_NUM_INTX - 1, PCIE_INTX_SHIFT) to make it clear that you are dealing with one bit per INTx. > + > +#define PCIE_INT_STATUS_REG 0x184 > + > #define PCIE_TRANS_TABLE_BASE_REG 0x800 > #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 > #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 > @@ -77,6 +86,8 @@ > * @phy: PHY controller block > * @clks: PCIe clocks > * @num_clks: PCIe clocks count for this port > + * @irq: PCIe controller interrupt number > + * @intx_domain: legacy INTx IRQ domain > */ > struct mtk_pcie_port { > struct device *dev; > @@ -87,6 +98,9 @@ struct mtk_pcie_port { > struct phy *phy; > struct clk_bulk_data *clks; > int num_clks; > + > + int irq; > + struct irq_domain *intx_domain; > }; > > /** > @@ -266,6 +280,149 @@ static int mtk_pcie_startup_port(struct > mtk_pcie_port *port) > return 0; > } > > +static int mtk_pcie_set_affinity(struct irq_data *data, > + const struct cpumask *mask, bool force) > +{ > + return -EINVAL; > +} > + > +static void mtk_intx_mask(struct irq_data *data) > +{ > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > + u32 val; > + > + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); > + val &= ~BIT(data->hwirq + PCIE_INTX_SHIFT); > + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); This is missing some locking. Otherwise, two concurrent mask/unmask for different interrupts will corrupt each other's state. > +} > + > +static void mtk_intx_unmask(struct irq_data *data) > +{ > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > + u32 val; > + > + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); > + val |= BIT(data->hwirq + PCIE_INTX_SHIFT); > + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); Same thing here. > +} > + > +/** > + * mtk_intx_eoi > + * @data: pointer to chip specific data > + * > + * As an emulated level IRQ, its interrupt status will remain > + * until the corresponding de-assert message is received; hence that > + * the status can only be cleared when the interrupt has been > serviced. > + */ > +static void mtk_intx_eoi(struct irq_data *data) > +{ > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > + unsigned long hwirq; > + > + hwirq = data->hwirq + PCIE_INTX_SHIFT; > + writel_relaxed(BIT(hwirq), port->base + PCIE_INT_STATUS_REG); > +} > + > +static struct irq_chip mtk_intx_irq_chip = { > + .irq_mask = mtk_intx_mask, > + .irq_unmask = mtk_intx_unmask, > + .irq_eoi = mtk_intx_eoi, > + .irq_set_affinity = mtk_pcie_set_affinity, > + .name = "PCIe", nit: "PCIe" is not really descriptive. "INTx" would be a bit better. > +}; > + > +static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int > irq, > + irq_hw_number_t hwirq) > +{ > + irq_set_chip_and_handler_name(irq, &mtk_intx_irq_chip, > + handle_fasteoi_irq, "INTx"); > + irq_set_chip_data(irq, domain->host_data); You probably want to set the chip_data *before* wiring the handler, as otherwise you could end-up with a NULL pointer in any of the callbacks if the interrupt fires between the two. > + > + return 0; > +} > + > +static const struct irq_domain_ops intx_domain_ops = { > + .map = mtk_pcie_intx_map, > +}; > + > +static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, > + struct device_node *node) > +{ > + struct device *dev = port->dev; > + struct device_node *intc_node; > + > + /* Setup INTx */ > + intc_node = of_get_child_by_name(node, "interrupt-controller"); > + if (!intc_node) { > + dev_err(dev, "missing PCIe Intc node\n"); > + return -ENODEV; > + } > + > + port->intx_domain = irq_domain_add_linear(intc_node, PCI_NUM_INTX, > + &intx_domain_ops, port); > + if (!port->intx_domain) { > + dev_err(dev, "failed to get INTx IRQ domain\n"); > + return -ENODEV; > + } > + > + return 0; > +} > + > +static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) > +{ > + irq_set_chained_handler_and_data(port->irq, NULL, NULL); > + > + if (port->intx_domain) > + irq_domain_remove(port->intx_domain); > + > + irq_dispose_mapping(port->irq); > +} > + > +static void mtk_pcie_irq_handler(struct irq_desc *desc) > +{ > + struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); > + struct irq_chip *irqchip = irq_desc_get_chip(desc); > + unsigned long status; > + unsigned int virq; > + irq_hw_number_t irq_bit = PCIE_INTX_SHIFT; > + > + chained_irq_enter(irqchip, desc); > + > + status = readl_relaxed(port->base + PCIE_INT_STATUS_REG); > + if (status & PCIE_INTX_MASK) { This "if (status & PCIE_INTX_MASK)" is already implicit from the for_each_set_bit_from() iterator, and you can drop it. > + for_each_set_bit_from(irq_bit, &status, PCI_NUM_INTX + > + PCIE_INTX_SHIFT) { > + virq = irq_find_mapping(port->intx_domain, > + irq_bit - PCIE_INTX_SHIFT); > + generic_handle_irq(virq); > + } > + } > + > + chained_irq_exit(irqchip, desc); > +} > + > +static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, > + struct device_node *node) > +{ > + struct device *dev = port->dev; > + struct platform_device *pdev = to_platform_device(dev); > + int err; > + > + err = mtk_pcie_init_irq_domains(port, node); > + if (err) { > + dev_err(dev, "failed to init PCIe IRQ domain\n"); > + return err; > + } > + > + port->irq = platform_get_irq(pdev, 0); > + if (port->irq < 0) > + return port->irq; > + > + irq_set_chained_handler_and_data(port->irq, mtk_pcie_irq_handler, > port); You seem to be missing something that will mask all INTx interrupts as an initial state. > + > + return 0; > +} > + > static int mtk_pcie_clk_init(struct mtk_pcie_port *port) > { > int ret; > @@ -388,6 +545,10 @@ static int mtk_pcie_setup(struct mtk_pcie_port > *port) > goto err_setup; > } > > + err = mtk_pcie_setup_irq(port, dev->of_node); > + if (err) > + goto err_setup; > + > dev_info(dev, "PCIe link up success!\n"); > > return 0; > @@ -423,6 +584,7 @@ static int mtk_pcie_probe(struct platform_device > *pdev) > > err = pci_host_probe(host); > if (err) { > + mtk_pcie_irq_teardown(port); > mtk_pcie_power_down(port); > return err; > } > @@ -440,6 +602,7 @@ static int mtk_pcie_remove(struct platform_device > *pdev) > pci_remove_root_bus(host->bus); > pci_unlock_rescan_remove(); > > + mtk_pcie_irq_teardown(port); > mtk_pcie_power_down(port); > > return 0; Thanks, M.
On Tue, 2021-01-26 at 12:25 +0000, Marc Zyngier wrote: > On 2021-01-13 11:39, Jianjun Wang wrote: > > Add INTx support for MediaTek Gen3 PCIe controller. > > > > Signed-off-by: Jianjun Wang <jianjun.wang@mediatek.com> > > Acked-by: Ryder Lee <ryder.lee@mediatek.com> > > --- > > drivers/pci/controller/pcie-mediatek-gen3.c | 163 ++++++++++++++++++++ > > 1 file changed, 163 insertions(+) > > > > diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c > > b/drivers/pci/controller/pcie-mediatek-gen3.c > > index c00ea7c167de..7979a2856c35 100644 > > --- a/drivers/pci/controller/pcie-mediatek-gen3.c > > +++ b/drivers/pci/controller/pcie-mediatek-gen3.c > > @@ -9,6 +9,9 @@ > > #include <linux/clk.h> > > #include <linux/delay.h> > > #include <linux/iopoll.h> > > +#include <linux/irq.h> > > +#include <linux/irqchip/chained_irq.h> > > +#include <linux/irqdomain.h> > > #include <linux/kernel.h> > > #include <linux/module.h> > > #include <linux/of_address.h> > > @@ -49,6 +52,12 @@ > > #define PCIE_LINK_STATUS_REG 0x154 > > #define PCIE_PORT_LINKUP BIT(8) > > > > +#define PCIE_INT_ENABLE_REG 0x180 > > +#define PCIE_INTX_SHIFT 24 > > +#define PCIE_INTX_MASK GENMASK(27, 24) > > I guess this '24' is actually PCIE_INTX_SHIFT? In this case, > please write it as > > GENMASK(PCIE_INTX_SHIFT + PCI_NUM_INTX - 1, PCIE_INTX_SHIFT) > > to make it clear that you are dealing with one bit per INTx. Yes, I will fix it in the next version, thanks for your review. > > > + > > +#define PCIE_INT_STATUS_REG 0x184 > > + > > #define PCIE_TRANS_TABLE_BASE_REG 0x800 > > #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 > > #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 > > @@ -77,6 +86,8 @@ > > * @phy: PHY controller block > > * @clks: PCIe clocks > > * @num_clks: PCIe clocks count for this port > > + * @irq: PCIe controller interrupt number > > + * @intx_domain: legacy INTx IRQ domain > > */ > > struct mtk_pcie_port { > > struct device *dev; > > @@ -87,6 +98,9 @@ struct mtk_pcie_port { > > struct phy *phy; > > struct clk_bulk_data *clks; > > int num_clks; > > + > > + int irq; > > + struct irq_domain *intx_domain; > > }; > > > > /** > > @@ -266,6 +280,149 @@ static int mtk_pcie_startup_port(struct > > mtk_pcie_port *port) > > return 0; > > } > > > > +static int mtk_pcie_set_affinity(struct irq_data *data, > > + const struct cpumask *mask, bool force) > > +{ > > + return -EINVAL; > > +} > > + > > +static void mtk_intx_mask(struct irq_data *data) > > +{ > > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > > + u32 val; > > + > > + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); > > + val &= ~BIT(data->hwirq + PCIE_INTX_SHIFT); > > + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); > > This is missing some locking. Otherwise, two concurrent mask/unmask > for different interrupts will corrupt each other's state. > > > +} > > + > > +static void mtk_intx_unmask(struct irq_data *data) > > +{ > > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > > + u32 val; > > + > > + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); > > + val |= BIT(data->hwirq + PCIE_INTX_SHIFT); > > + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); > > Same thing here. > > > +} > > + > > +/** > > + * mtk_intx_eoi > > + * @data: pointer to chip specific data > > + * > > + * As an emulated level IRQ, its interrupt status will remain > > + * until the corresponding de-assert message is received; hence that > > + * the status can only be cleared when the interrupt has been > > serviced. > > + */ > > +static void mtk_intx_eoi(struct irq_data *data) > > +{ > > + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); > > + unsigned long hwirq; > > + > > + hwirq = data->hwirq + PCIE_INTX_SHIFT; > > + writel_relaxed(BIT(hwirq), port->base + PCIE_INT_STATUS_REG); > > +} > > + > > +static struct irq_chip mtk_intx_irq_chip = { > > + .irq_mask = mtk_intx_mask, > > + .irq_unmask = mtk_intx_unmask, > > + .irq_eoi = mtk_intx_eoi, > > + .irq_set_affinity = mtk_pcie_set_affinity, > > + .name = "PCIe", > > nit: "PCIe" is not really descriptive. "INTx" would be a bit better. > > > +}; > > + > > +static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int > > irq, > > + irq_hw_number_t hwirq) > > +{ > > + irq_set_chip_and_handler_name(irq, &mtk_intx_irq_chip, > > + handle_fasteoi_irq, "INTx"); > > + irq_set_chip_data(irq, domain->host_data); > > You probably want to set the chip_data *before* wiring > the handler, as otherwise you could end-up with a NULL > pointer in any of the callbacks if the interrupt fires > between the two. > > > + > > + return 0; > > +} > > + > > +static const struct irq_domain_ops intx_domain_ops = { > > + .map = mtk_pcie_intx_map, > > +}; > > + > > +static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, > > + struct device_node *node) > > +{ > > + struct device *dev = port->dev; > > + struct device_node *intc_node; > > + > > + /* Setup INTx */ > > + intc_node = of_get_child_by_name(node, "interrupt-controller"); > > + if (!intc_node) { > > + dev_err(dev, "missing PCIe Intc node\n"); > > + return -ENODEV; > > + } > > + > > + port->intx_domain = irq_domain_add_linear(intc_node, PCI_NUM_INTX, > > + &intx_domain_ops, port); > > + if (!port->intx_domain) { > > + dev_err(dev, "failed to get INTx IRQ domain\n"); > > + return -ENODEV; > > + } > > + > > + return 0; > > +} > > + > > +static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) > > +{ > > + irq_set_chained_handler_and_data(port->irq, NULL, NULL); > > + > > + if (port->intx_domain) > > + irq_domain_remove(port->intx_domain); > > + > > + irq_dispose_mapping(port->irq); > > +} > > + > > +static void mtk_pcie_irq_handler(struct irq_desc *desc) > > +{ > > + struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); > > + struct irq_chip *irqchip = irq_desc_get_chip(desc); > > + unsigned long status; > > + unsigned int virq; > > + irq_hw_number_t irq_bit = PCIE_INTX_SHIFT; > > + > > + chained_irq_enter(irqchip, desc); > > + > > + status = readl_relaxed(port->base + PCIE_INT_STATUS_REG); > > + if (status & PCIE_INTX_MASK) { > > This "if (status & PCIE_INTX_MASK)" is already implicit from > the for_each_set_bit_from() iterator, and you can drop it. > > > + for_each_set_bit_from(irq_bit, &status, PCI_NUM_INTX + > > + PCIE_INTX_SHIFT) { > > + virq = irq_find_mapping(port->intx_domain, > > + irq_bit - PCIE_INTX_SHIFT); > > + generic_handle_irq(virq); > > + } > > + } > > + > > + chained_irq_exit(irqchip, desc); > > +} > > + > > +static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, > > + struct device_node *node) > > +{ > > + struct device *dev = port->dev; > > + struct platform_device *pdev = to_platform_device(dev); > > + int err; > > + > > + err = mtk_pcie_init_irq_domains(port, node); > > + if (err) { > > + dev_err(dev, "failed to init PCIe IRQ domain\n"); > > + return err; > > + } > > + > > + port->irq = platform_get_irq(pdev, 0); > > + if (port->irq < 0) > > + return port->irq; > > + > > + irq_set_chained_handler_and_data(port->irq, mtk_pcie_irq_handler, > > port); > > You seem to be missing something that will mask all INTx interrupts > as an initial state. Yes, the INTx default state of this chip is disabled, but there are still risks for driver use, I will add mask all INTx interrupts to mtk_pcie_startup_port function in the next version. Thanks. > > > + > > + return 0; > > +} > > + > > static int mtk_pcie_clk_init(struct mtk_pcie_port *port) > > { > > int ret; > > @@ -388,6 +545,10 @@ static int mtk_pcie_setup(struct mtk_pcie_port > > *port) > > goto err_setup; > > } > > > > + err = mtk_pcie_setup_irq(port, dev->of_node); > > + if (err) > > + goto err_setup; > > + > > dev_info(dev, "PCIe link up success!\n"); > > > > return 0; > > @@ -423,6 +584,7 @@ static int mtk_pcie_probe(struct platform_device > > *pdev) > > > > err = pci_host_probe(host); > > if (err) { > > + mtk_pcie_irq_teardown(port); > > mtk_pcie_power_down(port); > > return err; > > } > > @@ -440,6 +602,7 @@ static int mtk_pcie_remove(struct platform_device > > *pdev) > > pci_remove_root_bus(host->bus); > > pci_unlock_rescan_remove(); > > > > + mtk_pcie_irq_teardown(port); > > mtk_pcie_power_down(port); > > > > return 0; > > Thanks, > > M.
diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index c00ea7c167de..7979a2856c35 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -9,6 +9,9 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/iopoll.h> +#include <linux/irq.h> +#include <linux/irqchip/chained_irq.h> +#include <linux/irqdomain.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of_address.h> @@ -49,6 +52,12 @@ #define PCIE_LINK_STATUS_REG 0x154 #define PCIE_PORT_LINKUP BIT(8) +#define PCIE_INT_ENABLE_REG 0x180 +#define PCIE_INTX_SHIFT 24 +#define PCIE_INTX_MASK GENMASK(27, 24) + +#define PCIE_INT_STATUS_REG 0x184 + #define PCIE_TRANS_TABLE_BASE_REG 0x800 #define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4 #define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8 @@ -77,6 +86,8 @@ * @phy: PHY controller block * @clks: PCIe clocks * @num_clks: PCIe clocks count for this port + * @irq: PCIe controller interrupt number + * @intx_domain: legacy INTx IRQ domain */ struct mtk_pcie_port { struct device *dev; @@ -87,6 +98,9 @@ struct mtk_pcie_port { struct phy *phy; struct clk_bulk_data *clks; int num_clks; + + int irq; + struct irq_domain *intx_domain; }; /** @@ -266,6 +280,149 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port) return 0; } +static int mtk_pcie_set_affinity(struct irq_data *data, + const struct cpumask *mask, bool force) +{ + return -EINVAL; +} + +static void mtk_intx_mask(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + u32 val; + + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); + val &= ~BIT(data->hwirq + PCIE_INTX_SHIFT); + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); +} + +static void mtk_intx_unmask(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + u32 val; + + val = readl_relaxed(port->base + PCIE_INT_ENABLE_REG); + val |= BIT(data->hwirq + PCIE_INTX_SHIFT); + writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG); +} + +/** + * mtk_intx_eoi + * @data: pointer to chip specific data + * + * As an emulated level IRQ, its interrupt status will remain + * until the corresponding de-assert message is received; hence that + * the status can only be cleared when the interrupt has been serviced. + */ +static void mtk_intx_eoi(struct irq_data *data) +{ + struct mtk_pcie_port *port = irq_data_get_irq_chip_data(data); + unsigned long hwirq; + + hwirq = data->hwirq + PCIE_INTX_SHIFT; + writel_relaxed(BIT(hwirq), port->base + PCIE_INT_STATUS_REG); +} + +static struct irq_chip mtk_intx_irq_chip = { + .irq_mask = mtk_intx_mask, + .irq_unmask = mtk_intx_unmask, + .irq_eoi = mtk_intx_eoi, + .irq_set_affinity = mtk_pcie_set_affinity, + .name = "PCIe", +}; + +static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler_name(irq, &mtk_intx_irq_chip, + handle_fasteoi_irq, "INTx"); + irq_set_chip_data(irq, domain->host_data); + + return 0; +} + +static const struct irq_domain_ops intx_domain_ops = { + .map = mtk_pcie_intx_map, +}; + +static int mtk_pcie_init_irq_domains(struct mtk_pcie_port *port, + struct device_node *node) +{ + struct device *dev = port->dev; + struct device_node *intc_node; + + /* Setup INTx */ + intc_node = of_get_child_by_name(node, "interrupt-controller"); + if (!intc_node) { + dev_err(dev, "missing PCIe Intc node\n"); + return -ENODEV; + } + + port->intx_domain = irq_domain_add_linear(intc_node, PCI_NUM_INTX, + &intx_domain_ops, port); + if (!port->intx_domain) { + dev_err(dev, "failed to get INTx IRQ domain\n"); + return -ENODEV; + } + + return 0; +} + +static void mtk_pcie_irq_teardown(struct mtk_pcie_port *port) +{ + irq_set_chained_handler_and_data(port->irq, NULL, NULL); + + if (port->intx_domain) + irq_domain_remove(port->intx_domain); + + irq_dispose_mapping(port->irq); +} + +static void mtk_pcie_irq_handler(struct irq_desc *desc) +{ + struct mtk_pcie_port *port = irq_desc_get_handler_data(desc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); + unsigned long status; + unsigned int virq; + irq_hw_number_t irq_bit = PCIE_INTX_SHIFT; + + chained_irq_enter(irqchip, desc); + + status = readl_relaxed(port->base + PCIE_INT_STATUS_REG); + if (status & PCIE_INTX_MASK) { + for_each_set_bit_from(irq_bit, &status, PCI_NUM_INTX + + PCIE_INTX_SHIFT) { + virq = irq_find_mapping(port->intx_domain, + irq_bit - PCIE_INTX_SHIFT); + generic_handle_irq(virq); + } + } + + chained_irq_exit(irqchip, desc); +} + +static int mtk_pcie_setup_irq(struct mtk_pcie_port *port, + struct device_node *node) +{ + struct device *dev = port->dev; + struct platform_device *pdev = to_platform_device(dev); + int err; + + err = mtk_pcie_init_irq_domains(port, node); + if (err) { + dev_err(dev, "failed to init PCIe IRQ domain\n"); + return err; + } + + port->irq = platform_get_irq(pdev, 0); + if (port->irq < 0) + return port->irq; + + irq_set_chained_handler_and_data(port->irq, mtk_pcie_irq_handler, port); + + return 0; +} + static int mtk_pcie_clk_init(struct mtk_pcie_port *port) { int ret; @@ -388,6 +545,10 @@ static int mtk_pcie_setup(struct mtk_pcie_port *port) goto err_setup; } + err = mtk_pcie_setup_irq(port, dev->of_node); + if (err) + goto err_setup; + dev_info(dev, "PCIe link up success!\n"); return 0; @@ -423,6 +584,7 @@ static int mtk_pcie_probe(struct platform_device *pdev) err = pci_host_probe(host); if (err) { + mtk_pcie_irq_teardown(port); mtk_pcie_power_down(port); return err; } @@ -440,6 +602,7 @@ static int mtk_pcie_remove(struct platform_device *pdev) pci_remove_root_bus(host->bus); pci_unlock_rescan_remove(); + mtk_pcie_irq_teardown(port); mtk_pcie_power_down(port); return 0;