[PATCH v3 08/11] PCI: microchip: Move IRQ init functions to pcie-plda-host.c

From: Minda Chen
Date: Mon Aug 14 2023 - 04:21:31 EST

Move IRQ init functions to pcie-plda-host.c. mc_handle_event
merge to plda_handle_event, Add get_events functions,
PolarFire PCIe uses get_events function pointer to get
their events num.

Signed-off-by: Minda Chen <minda.chen@xxxxxxxxxxxxxxxx>
---
.../pci/controller/plda/pcie-microchip-host.c | 125 +---------------
drivers/pci/controller/plda/pcie-plda-host.c | 140 ++++++++++++++++--
drivers/pci/controller/plda/pcie-plda.h | 15 +-
3 files changed, 139 insertions(+), 141 deletions(-)

diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index 140e7ca1a5cb..e71e34afab2a 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -314,10 +314,6 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI);
}

-static const struct irq_domain_ops intx_domain_ops = {
- .map = plda_pcie_intx_map,
-};
-
static inline u32 reg_to_event(u32 reg, struct event_map field)
{
return (reg & field.reg_mask) ? BIT(field.event_bit) : 0;
@@ -404,23 +400,6 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}

-static void mc_handle_event(struct irq_desc *desc)
-{
- struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
- unsigned long events;
- u32 bit;
- struct irq_chip *chip = irq_desc_get_chip(desc);
-
- chained_irq_enter(chip, desc);
-
- events = get_events(port);
-
- for_each_set_bit(bit, &events, NUM_EVENTS)
- generic_handle_domain_irq(port->event_domain, bit);
-
- chained_irq_exit(chip, desc);
-}
-
static void mc_ack_event_irq(struct irq_data *data)
{
struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
@@ -559,45 +538,6 @@ static int mc_pcie_init_clks(struct device *dev)
return 0;
}

-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;
- struct device_node *pcie_intc_node;
-
- /* Setup INTx */
- pcie_intc_node = of_get_next_child(node, NULL);
- if (!pcie_intc_node) {
- dev_err(dev, "failed to find PCIe Intc node\n");
- return -EINVAL;
- }
-
- 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);
- return -ENOMEM;
- }
-
- irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
-
- port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
- &intx_domain_ops, port);
- if (!port->intx_domain) {
- dev_err(dev, "failed to get an INTx IRQ domain\n");
- of_node_put(pcie_intc_node);
- return -ENOMEM;
- }
-
- irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
-
- of_node_put(pcie_intc_node);
- raw_spin_lock_init(&port->lock);
-
- return plda_allocate_msi_domains(port);
-}
-
static inline void mc_clear_secs(struct mc_pcie *port)
{
void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;
@@ -658,66 +598,6 @@ static void mc_disable_interrupts(struct mc_pcie *port)
writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
}

-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 = plda_pcie_init_irq_domains(port, evt);
- if (ret) {
- dev_err(dev, "failed creating IRQ domains\n");
- return ret;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return -ENODEV;
-
- 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;
- }
-
- 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;
- }
- }
-
- intx_irq = irq_create_mapping(port->event_domain,
- evt->intx_evt);
- if (!intx_irq) {
- dev_err(dev, "failed to map INTx interrupt\n");
- return -ENXIO;
- }
-
- /* Plug the INTx chained handler */
- irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
-
- msi_irq = irq_create_mapping(port->event_domain,
- evt->msi_evt);
- if (!msi_irq)
- return -ENXIO;
-
- /* Plug the MSI chained handler */
- irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
-
- /* Plug the main event chained handler */
- irq_set_chained_handler_and_data(irq, mc_handle_event, port);
-
- return 0;
-}
-
static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq,
int evt)
{
@@ -725,6 +605,10 @@ static int mc_request_evt_irq(struct plda_pcie_rp *plda, int event_irq,
0, event_cause[evt].sym, plda);
}

+static const struct plda_pcie_ops plda_ops = {
+ .get_events = get_events,
+};
+
static int mc_platform_init(struct pci_config_window *cfg)
{
struct device *dev = cfg->parent;
@@ -773,6 +657,7 @@ static int mc_host_probe(struct platform_device *pdev)
plda = &port->plda;
plda->dev = dev;
plda->num_events = NUM_EVENTS;
+ plda->ops = &plda_ops;

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-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
index bf63f220a518..73a7c10d379d 100644
--- a/drivers/pci/controller/plda/pcie-plda-host.c
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -20,7 +20,7 @@

#include "pcie-plda.h"

-void plda_handle_msi(struct irq_desc *desc)
+static void plda_handle_msi(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -83,7 +83,7 @@ static struct irq_chip plda_msi_bottom_irq_chip = {
.irq_set_affinity = plda_msi_set_affinity,
};

-int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *args)
{
struct plda_pcie_rp *port = domain->host_data;
@@ -142,7 +142,7 @@ static struct msi_domain_info plda_msi_domain_info = {
.chip = &plda_msi_irq_chip,
};

-int plda_allocate_msi_domains(struct plda_pcie_rp *port)
+static int plda_allocate_msi_domains(struct plda_pcie_rp *port)
{
struct device *dev = port->dev;
struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
@@ -168,7 +168,7 @@ int plda_allocate_msi_domains(struct plda_pcie_rp *port)
return 0;
}

-void plda_handle_intx(struct irq_desc *desc)
+static void plda_handle_intx(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -241,7 +241,7 @@ static struct irq_chip plda_intx_irq_chip = {
.irq_unmask = plda_unmask_intx_irq,
};

-int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
@@ -250,12 +250,16 @@ int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
return 0;
}

-irqreturn_t plda_event_handler(int irq, void *dev_id)
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = plda_pcie_intx_map,
+};
+
+static irqreturn_t plda_event_handler(int irq, void *dev_id)
{
return IRQ_HANDLED;
}

-void plda_handle_event(struct irq_desc *desc)
+static void plda_handle_event(struct irq_desc *desc)
{
struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -264,14 +268,18 @@ void plda_handle_event(struct irq_desc *desc)

chained_irq_enter(chip, desc);

- val = readl_relaxed(port->bridge_addr + ISTATUS_LOCAL);
- origin = val;
- val = val >> A_ATR_EVT_POST_ERR_SHIFT;
- events |= val & 0xff;
- if (origin & PM_MSI_INT_INTX_MASK)
- events |= BIT(EVENT_PM_MSI_INT_INTX);
- val = (origin >> PM_MSI_INT_MSI_SHIFT) & 0xf;
- events |= val << EVENT_PM_MSI_INT_MSI;
+ if (port->ops && port->ops->get_events) {
+ events = port->ops->get_events(port);
+ } else {
+ val = readl_relaxed(port->bridge_addr + ISTATUS_LOCAL);
+ origin = val;
+ val = val >> A_ATR_EVT_POST_ERR_SHIFT;
+ events |= val & 0xff;
+ if (origin & PM_MSI_INT_INTX_MASK)
+ events |= BIT(EVENT_PM_MSI_INT_INTX);
+ val = (origin >> PM_MSI_INT_MSI_SHIFT) & 0xf;
+ events |= val << EVENT_PM_MSI_INT_MSI;
+ }

for_each_set_bit(bit, &events, port->num_events)
generic_handle_domain_irq(port->event_domain, bit);
@@ -349,6 +357,108 @@ static const struct irq_domain_ops plda_evt_dom_ops = {
.map = plda_pcie_event_map,
};

+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;
+ struct device_node *pcie_intc_node;
+ const struct irq_domain_ops *ops;
+
+ /* Setup INTx */
+ pcie_intc_node = of_get_next_child(node, NULL);
+ if (!pcie_intc_node) {
+ dev_err(dev, "failed to find PCIe Intc node\n");
+ return -EINVAL;
+ }
+
+ ops = evt->domain_ops ? evt->domain_ops : &plda_evt_dom_ops;
+ port->event_domain = irq_domain_add_linear(pcie_intc_node, port->num_events,
+ ops, port);
+ if (!port->event_domain) {
+ dev_err(dev, "failed to get event domain\n");
+ of_node_put(pcie_intc_node);
+ return -ENOMEM;
+ }
+
+ irq_domain_update_bus_token(port->event_domain, DOMAIN_BUS_NEXUS);
+
+ port->intx_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
+ &intx_domain_ops, port);
+ if (!port->intx_domain) {
+ dev_err(dev, "failed to get an INTx IRQ domain\n");
+ of_node_put(pcie_intc_node);
+ return -ENOMEM;
+ }
+
+ irq_domain_update_bus_token(port->intx_domain, DOMAIN_BUS_WIRED);
+
+ of_node_put(pcie_intc_node);
+ raw_spin_lock_init(&port->lock);
+
+ return plda_allocate_msi_domains(port);
+}
+
+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 = plda_pcie_init_irq_domains(port, evt);
+ if (ret) {
+ dev_err(dev, "failed creating IRQ domains\n");
+ return ret;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ 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;
+ }
+
+ 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;
+ }
+ }
+
+ intx_irq = irq_create_mapping(port->event_domain,
+ evt->intx_evt);
+ if (!intx_irq) {
+ dev_err(dev, "failed to map INTx interrupt\n");
+ return -ENXIO;
+ }
+
+ /* Plug the INTx chained handler */
+ irq_set_chained_handler_and_data(intx_irq, plda_handle_intx, port);
+
+ msi_irq = irq_create_mapping(port->event_domain,
+ evt->msi_evt);
+ if (!msi_irq)
+ return -ENXIO;
+
+ /* Plug the MSI chained handler */
+ irq_set_chained_handler_and_data(msi_irq, plda_handle_msi, port);
+
+ /* Plug the main event chained handler */
+ irq_set_chained_handler_and_data(irq, plda_handle_event, port);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(plda_init_interrupts);
+
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size)
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 7571b0bbf37f..099a4fdd1148 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -107,6 +107,12 @@

#define PM_MSI_TO_MASK_OFFSET 19

+struct plda_pcie_rp;
+
+struct plda_pcie_ops {
+ u32 (*get_events)(struct plda_pcie_rp *pcie);
+};
+
struct plda_msi {
struct mutex lock; /* Protect used bitmap */
struct irq_domain *msi_domain;
@@ -122,6 +128,7 @@ struct plda_pcie_rp {
struct irq_domain *event_domain;
raw_spinlock_t lock;
struct plda_msi msi;
+ const struct plda_pcie_ops *ops;
void __iomem *bridge_addr;
int num_events;
};
@@ -133,12 +140,8 @@ struct plda_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);
-void plda_handle_intx(struct irq_desc *desc);
-int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
- irq_hw_number_t hwirq);
+int plda_init_interrupts(struct platform_device *pdev,
+ struct plda_pcie_rp *port, struct plda_evt *evt);
void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
phys_addr_t axi_addr, phys_addr_t pci_addr,
size_t size);
--
2.17.1