[PATCH v3 07/11] PCI: microchip: Rename IRQ init function

Minda Chen
2023-08-14T08:21:28Z

Rename IRQ init function and prepare for re-use
IRQ init function.

rename list:
mc_init_interrupts -> plda_init_interrupts
mc_pcie_init_irq_domain-> plda_pcie_init_irq_domains

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
---
.../pci/controller/plda/pcie-microchip-host.c | 37 +++++++++++++------
drivers/pci/controller/plda/pcie-plda.h | 7 ++++
2 files changed, 33 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index b42f1aac3ec3..140e7ca1a5cb 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -559,7 +559,7 @@ static int mc_pcie_init_clks(struct device *dev)
return 0;
}

-static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
+static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port, struct plda_evt *evt)
{
struct device *dev = port->dev;
struct device_node *node = dev->of_node;
@@ -572,8 +572,8 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
return -EINVAL;
}

- port->event_domain = irq_domain_add_linear(pcie_intc_node, NUM_EVENTS,
- &event_domain_ops, port);
+ port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
+ evt->domain_ops, port);
if (!port->event_domain) {
dev_err(dev, "failed to get event domain\n");
of_node_put(pcie_intc_node);
@@ -658,14 +658,15 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}

-static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
+static int plda_init_interrupts(struct platform_device *pdev,
+ struct plda_pcie_rp *port, struct plda_evt *evt)
{
struct device *dev = &pdev->dev;
int irq;
int i, intx_irq, msi_irq, event_irq;
int ret;

- ret = mc_pcie_init_irq_domains(port);
+ ret = plda_pcie_init_irq_domains(port, evt);
if (ret) {
dev_err(dev, "failed creating IRQ domains\n");
return ret;
@@ -675,15 +676,18 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
if (irq < 0)
return -ENODEV;

- for (i = 0; i < NUM_EVENTS; i++) {
+ for (i = 0; i < port->num_events; i++) {
event_irq = irq_create_mapping(port->event_domain, i);
if (!event_irq) {
dev_err(dev, "failed to map hwirq %d\n", i);
return -ENXIO;
}

- ret = devm_request_irq(dev, event_irq, mc_event_handler,
- 0, event_cause[i].sym, port);
+ if (evt->request_evt_irq)
+ ret = evt->request_evt_irq(port, event_irq, i);
+ else
+ ret = devm_request_irq(dev, event_irq, plda_event_handler,
+ 0, NULL, port);
if (ret) {
dev_err(dev, "failed to request IRQ %d\n", event_irq);
return ret;
@@ -691,7 +695,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
}

intx_irq = irq_create_mapping(port->event_domain,
- EVENT_LOCAL_PM_MSI_INT_INTX);
+ evt->intx_evt);
if (!intx_irq) {
dev_err(dev, "failed to map INTx interrupt\n");
return -ENXIO;
@@ -701,7 +705,7 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);

msi_irq = irq_create_mapping(port->event_domain,
- EVENT_LOCAL_PM_MSI_INT_MSI);
+ evt->msi_evt);
if (!msi_irq)
return -ENXIO;

@@ -714,6 +718,13 @@ static int mc_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp
return 0;
}

+static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq,
+ int evt)
+{
+ return devm_request_irq(plda->dev, event_irq, mc_event_handler,
+ 0, event_cause[evt].sym, plda);
+}
+
static int mc_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;
@@ -721,6 +732,9 @@ static int mc_platform_init(struct pci_config_window *cfg)
void __iomem *bridge_base_addr =
port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
+ struct plda_evt evt = {&event_domain_ops, mc_request_evt_irq,
+ EVENT_LOCAL_PM_MSI_INT_INTX,
+ EVENT_LOCAL_PM_MSI_INT_MSI};
int ret;

/* Configure address translation table 0 for PCIe config space */
@@ -737,7 +751,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
return ret;

/* Address translation is up; safe to enable interrupts */
- ret = mc_init_interrupts(pdev, &port->plda);
+ ret = plda_init_interrupts(pdev, &port->plda, &evt);
if (ret)
return ret;

@@ -758,6 +772,7 @@ static int mc_host_probe(struct platform_device *pdev)

plda = &port->plda;
plda->dev = dev;
+ plda->num_events = NUM_EVENTS;

port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(port->axi_base_addr))
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 56483ebb678d..7571b0bbf37f 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -126,6 +126,13 @@ struct plda_pcie_rp {
int num_events;
};

+struct plda_evt {
+ const struct irq_domain_ops *domain_ops;
+ int (*request_evt_irq)(struct plda_pcie_rp *pcie, int evt_irq, int event);
+ int intx_evt;
+ int msi_evt;
+};
+
void plda_handle_msi(struct irq_desc *desc);
int plda_allocate_msi_domains(struct plda_pcie_rp *port);
irqreturn_t plda_event_handler(int irq, void *dev_id);
--
2.17.1