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    Subject[PATCH v9 16/20] PCI: microchip: Move IRQ functions to pcie-plda-host.c
    Date
    Move IRQ related functions to pcie-plda-host.c
    for re-use these codes. Now Refactoring codes
    complete.

    Including MSI, INTx, event interrupts and IRQ
    init functions.

    Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
    Acked-by: Conor Dooley <conor.dooley@microchip.com>
    ---
    .../pci/controller/plda/pcie-microchip-host.c | 366 -----------------
    drivers/pci/controller/plda/pcie-plda-host.c | 367 ++++++++++++++++++
    drivers/pci/controller/plda/pcie-plda.h | 3 +
    3 files changed, 370 insertions(+), 366 deletions(-)

    diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
    index 4765a596a517..6995461daec7 100644
    --- a/drivers/pci/controller/plda/pcie-microchip-host.c
    +++ b/drivers/pci/controller/plda/pcie-microchip-host.c
    @@ -318,240 +318,6 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
    ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI);
    }

    -static 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);
    - struct device *dev = port->dev;
    - struct plda_msi *msi = &port->msi;
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - unsigned long status;
    - u32 bit;
    - int ret;
    -
    - chained_irq_enter(chip, desc);
    -
    - status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
    - if (status & PM_MSI_INT_MSI_MASK) {
    - writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
    - status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
    - for_each_set_bit(bit, &status, msi->num_vectors) {
    - ret = generic_handle_domain_irq(msi->dev_domain, bit);
    - if (ret)
    - dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
    - bit);
    - }
    - }
    -
    - chained_irq_exit(chip, desc);
    -}
    -
    -static void plda_msi_bottom_irq_ack(struct irq_data *data)
    -{
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - u32 bitpos = data->hwirq;
    -
    - writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
    -}
    -
    -static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
    -{
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    - phys_addr_t addr = port->msi.vector_phy;
    -
    - msg->address_lo = lower_32_bits(addr);
    - msg->address_hi = upper_32_bits(addr);
    - msg->data = data->hwirq;
    -
    - dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
    - (int)data->hwirq, msg->address_hi, msg->address_lo);
    -}
    -
    -static int plda_msi_set_affinity(struct irq_data *irq_data,
    - const struct cpumask *mask, bool force)
    -{
    - return -EINVAL;
    -}
    -
    -static struct irq_chip plda_msi_bottom_irq_chip = {
    - .name = "PLDA MSI",
    - .irq_ack = plda_msi_bottom_irq_ack,
    - .irq_compose_msi_msg = plda_compose_msi_msg,
    - .irq_set_affinity = plda_msi_set_affinity,
    -};
    -
    -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;
    - struct plda_msi *msi = &port->msi;
    - unsigned long bit;
    -
    - mutex_lock(&msi->lock);
    - bit = find_first_zero_bit(msi->used, msi->num_vectors);
    - if (bit >= msi->num_vectors) {
    - mutex_unlock(&msi->lock);
    - return -ENOSPC;
    - }
    -
    - set_bit(bit, msi->used);
    -
    - irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
    - domain->host_data, handle_edge_irq, NULL, NULL);
    -
    - mutex_unlock(&msi->lock);
    -
    - return 0;
    -}
    -
    -static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
    - unsigned int nr_irqs)
    -{
    - struct irq_data *d = irq_domain_get_irq_data(domain, virq);
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
    - struct plda_msi *msi = &port->msi;
    -
    - mutex_lock(&msi->lock);
    -
    - if (test_bit(d->hwirq, msi->used))
    - __clear_bit(d->hwirq, msi->used);
    - else
    - dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
    -
    - mutex_unlock(&msi->lock);
    -}
    -
    -static const struct irq_domain_ops msi_domain_ops = {
    - .alloc = plda_irq_msi_domain_alloc,
    - .free = plda_irq_msi_domain_free,
    -};
    -
    -static struct irq_chip plda_msi_irq_chip = {
    - .name = "PLDA PCIe MSI",
    - .irq_ack = irq_chip_ack_parent,
    - .irq_mask = pci_msi_mask_irq,
    - .irq_unmask = pci_msi_unmask_irq,
    -};
    -
    -static struct msi_domain_info plda_msi_domain_info = {
    - .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
    - MSI_FLAG_PCI_MSIX),
    - .chip = &plda_msi_irq_chip,
    -};
    -
    -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);
    - struct plda_msi *msi = &port->msi;
    -
    - mutex_init(&port->msi.lock);
    -
    - msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
    - &msi_domain_ops, port);
    - if (!msi->dev_domain) {
    - dev_err(dev, "failed to create IRQ domain\n");
    - return -ENOMEM;
    - }
    -
    - msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
    - msi->dev_domain);
    - if (!msi->msi_domain) {
    - dev_err(dev, "failed to create MSI domain\n");
    - irq_domain_remove(msi->dev_domain);
    - return -ENOMEM;
    - }
    -
    - return 0;
    -}
    -
    -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);
    - struct device *dev = port->dev;
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - unsigned long status;
    - u32 bit;
    - int ret;
    -
    - chained_irq_enter(chip, desc);
    -
    - status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
    - if (status & PM_MSI_INT_INTX_MASK) {
    - status &= PM_MSI_INT_INTX_MASK;
    - status >>= PM_MSI_INT_INTX_SHIFT;
    - for_each_set_bit(bit, &status, PCI_NUM_INTX) {
    - ret = generic_handle_domain_irq(port->intx_domain, bit);
    - if (ret)
    - dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
    - bit);
    - }
    - }
    -
    - chained_irq_exit(chip, desc);
    -}
    -
    -static void plda_ack_intx_irq(struct irq_data *data)
    -{
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    -
    - writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
    -}
    -
    -static void plda_mask_intx_irq(struct irq_data *data)
    -{
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - unsigned long flags;
    - u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    - u32 val;
    -
    - raw_spin_lock_irqsave(&port->lock, flags);
    - val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
    - val &= ~mask;
    - writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
    - raw_spin_unlock_irqrestore(&port->lock, flags);
    -}
    -
    -static void plda_unmask_intx_irq(struct irq_data *data)
    -{
    - struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    - void __iomem *bridge_base_addr = port->bridge_addr;
    - unsigned long flags;
    - u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    - u32 val;
    -
    - raw_spin_lock_irqsave(&port->lock, flags);
    - val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
    - val |= mask;
    - writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
    - raw_spin_unlock_irqrestore(&port->lock, flags);
    -}
    -
    -static struct irq_chip plda_intx_irq_chip = {
    - .name = "PLDA PCIe INTx",
    - .irq_ack = plda_ack_intx_irq,
    - .irq_mask = plda_mask_intx_irq,
    - .irq_unmask = plda_unmask_intx_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);
    - irq_set_chip_data(irq, domain->host_data);
    -
    - return 0;
    -}
    -
    -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;
    @@ -638,28 +404,6 @@ static irqreturn_t mc_event_handler(int irq, void *dev_id)
    return IRQ_HANDLED;
    }

    -static irqreturn_t plda_event_handler(int irq, void *dev_id)
    -{
    - return IRQ_HANDLED;
    -}
    -
    -static void plda_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 = port->event_ops->get_events(port);
    -
    - for_each_set_bit(bit, &events, port->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);
    @@ -823,47 +567,6 @@ static const struct plda_event mc_event = {
    .msi_event = EVENT_LOCAL_PM_MSI_INT_MSI,
    };

    -static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
    - const struct irq_domain_ops *ops)
    -{
    - 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,
    - 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;
    @@ -924,75 +627,6 @@ 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,
    - const struct plda_event *event)
    -{
    - struct device *dev = &pdev->dev;
    - int irq;
    - int i, intx_irq, msi_irq, event_irq;
    - int ret;
    -
    - if (!event->event_ops || !event->event_ops->get_events) {
    - dev_err(dev, "no get events ops\n");
    - return -EINVAL;
    - }
    -
    - ret = plda_pcie_init_irq_domains(port, event->domain_ops);
    - if (ret) {
    - dev_err(dev, "failed creating IRQ domains\n");
    - return ret;
    - }
    -
    - irq = platform_get_irq(pdev, 0);
    - if (irq < 0)
    - return -ENODEV;
    -
    - port->event_ops = event->event_ops;
    -
    - 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 (event->request_event_irq)
    - ret = event->request_event_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,
    - event->intx_event);
    - 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,
    - event->msi_event);
    - 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;
    -}
    -
    static int mc_platform_init(struct pci_config_window *cfg)
    {
    struct device *dev = cfg->parent;
    diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
    index 19131181897f..4a4a2b5ef8fb 100644
    --- a/drivers/pci/controller/plda/pcie-plda-host.c
    +++ b/drivers/pci/controller/plda/pcie-plda-host.c
    @@ -18,6 +18,373 @@

    #include "pcie-plda.h"

    +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);
    + struct device *dev = port->dev;
    + struct plda_msi *msi = &port->msi;
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + unsigned long status;
    + u32 bit;
    + int ret;
    +
    + chained_irq_enter(chip, desc);
    +
    + status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
    + if (status & PM_MSI_INT_MSI_MASK) {
    + writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
    + status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
    + for_each_set_bit(bit, &status, msi->num_vectors) {
    + ret = generic_handle_domain_irq(msi->dev_domain, bit);
    + if (ret)
    + dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
    + bit);
    + }
    + }
    +
    + chained_irq_exit(chip, desc);
    +}
    +
    +static void plda_msi_bottom_irq_ack(struct irq_data *data)
    +{
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + u32 bitpos = data->hwirq;
    +
    + writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
    +}
    +
    +static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
    +{
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    + phys_addr_t addr = port->msi.vector_phy;
    +
    + msg->address_lo = lower_32_bits(addr);
    + msg->address_hi = upper_32_bits(addr);
    + msg->data = data->hwirq;
    +
    + dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
    + (int)data->hwirq, msg->address_hi, msg->address_lo);
    +}
    +
    +static int plda_msi_set_affinity(struct irq_data *irq_data,
    + const struct cpumask *mask, bool force)
    +{
    + return -EINVAL;
    +}
    +
    +static struct irq_chip plda_msi_bottom_irq_chip = {
    + .name = "PLDA MSI",
    + .irq_ack = plda_msi_bottom_irq_ack,
    + .irq_compose_msi_msg = plda_compose_msi_msg,
    + .irq_set_affinity = plda_msi_set_affinity,
    +};
    +
    +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;
    + struct plda_msi *msi = &port->msi;
    + unsigned long bit;
    +
    + mutex_lock(&msi->lock);
    + bit = find_first_zero_bit(msi->used, msi->num_vectors);
    + if (bit >= msi->num_vectors) {
    + mutex_unlock(&msi->lock);
    + return -ENOSPC;
    + }
    +
    + set_bit(bit, msi->used);
    +
    + irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
    + domain->host_data, handle_edge_irq, NULL, NULL);
    +
    + mutex_unlock(&msi->lock);
    +
    + return 0;
    +}
    +
    +static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
    + unsigned int nr_irqs)
    +{
    + struct irq_data *d = irq_domain_get_irq_data(domain, virq);
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
    + struct plda_msi *msi = &port->msi;
    +
    + mutex_lock(&msi->lock);
    +
    + if (test_bit(d->hwirq, msi->used))
    + __clear_bit(d->hwirq, msi->used);
    + else
    + dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
    +
    + mutex_unlock(&msi->lock);
    +}
    +
    +static const struct irq_domain_ops msi_domain_ops = {
    + .alloc = plda_irq_msi_domain_alloc,
    + .free = plda_irq_msi_domain_free,
    +};
    +
    +static struct irq_chip plda_msi_irq_chip = {
    + .name = "PLDA PCIe MSI",
    + .irq_ack = irq_chip_ack_parent,
    + .irq_mask = pci_msi_mask_irq,
    + .irq_unmask = pci_msi_unmask_irq,
    +};
    +
    +static struct msi_domain_info plda_msi_domain_info = {
    + .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
    + MSI_FLAG_PCI_MSIX),
    + .chip = &plda_msi_irq_chip,
    +};
    +
    +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);
    + struct plda_msi *msi = &port->msi;
    +
    + mutex_init(&port->msi.lock);
    +
    + msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
    + &msi_domain_ops, port);
    + if (!msi->dev_domain) {
    + dev_err(dev, "failed to create IRQ domain\n");
    + return -ENOMEM;
    + }
    +
    + msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
    + msi->dev_domain);
    + if (!msi->msi_domain) {
    + dev_err(dev, "failed to create MSI domain\n");
    + irq_domain_remove(msi->dev_domain);
    + return -ENOMEM;
    + }
    +
    + return 0;
    +}
    +
    +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);
    + struct device *dev = port->dev;
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + unsigned long status;
    + u32 bit;
    + int ret;
    +
    + chained_irq_enter(chip, desc);
    +
    + status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
    + if (status & PM_MSI_INT_INTX_MASK) {
    + status &= PM_MSI_INT_INTX_MASK;
    + status >>= PM_MSI_INT_INTX_SHIFT;
    + for_each_set_bit(bit, &status, PCI_NUM_INTX) {
    + ret = generic_handle_domain_irq(port->intx_domain, bit);
    + if (ret)
    + dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
    + bit);
    + }
    + }
    +
    + chained_irq_exit(chip, desc);
    +}
    +
    +static void plda_ack_intx_irq(struct irq_data *data)
    +{
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    +
    + writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
    +}
    +
    +static void plda_mask_intx_irq(struct irq_data *data)
    +{
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + unsigned long flags;
    + u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    + u32 val;
    +
    + raw_spin_lock_irqsave(&port->lock, flags);
    + val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
    + val &= ~mask;
    + writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
    + raw_spin_unlock_irqrestore(&port->lock, flags);
    +}
    +
    +static void plda_unmask_intx_irq(struct irq_data *data)
    +{
    + struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
    + void __iomem *bridge_base_addr = port->bridge_addr;
    + unsigned long flags;
    + u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
    + u32 val;
    +
    + raw_spin_lock_irqsave(&port->lock, flags);
    + val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
    + val |= mask;
    + writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
    + raw_spin_unlock_irqrestore(&port->lock, flags);
    +}
    +
    +static struct irq_chip plda_intx_irq_chip = {
    + .name = "PLDA PCIe INTx",
    + .irq_ack = plda_ack_intx_irq,
    + .irq_mask = plda_mask_intx_irq,
    + .irq_unmask = plda_unmask_intx_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);
    + irq_set_chip_data(irq, domain->host_data);
    +
    + return 0;
    +}
    +
    +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;
    +}
    +
    +static void plda_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 = port->event_ops->get_events(port);
    +
    + for_each_set_bit(bit, &events, port->num_events)
    + generic_handle_domain_irq(port->event_domain, bit);
    +
    + chained_irq_exit(chip, desc);
    +}
    +
    +static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port,
    + const struct irq_domain_ops *ops)
    +{
    + 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,
    + 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,
    + const struct plda_event *event)
    +{
    + struct device *dev = &pdev->dev;
    + int irq;
    + int i, intx_irq, msi_irq, event_irq;
    + int ret;
    +
    + if (!event->event_ops || !event->event_ops->get_events) {
    + dev_err(dev, "no get events ops\n");
    + return -EINVAL;
    + }
    +
    + ret = plda_pcie_init_irq_domains(port, event->domain_ops);
    + if (ret) {
    + dev_err(dev, "failed creating IRQ domains\n");
    + return ret;
    + }
    +
    + irq = platform_get_irq(pdev, 0);
    + if (irq < 0)
    + return -ENODEV;
    +
    + port->event_ops = event->event_ops;
    +
    + 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 (event->request_event_irq)
    + ret = event->request_event_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,
    + event->intx_event);
    + 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,
    + event->msi_event);
    + 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 820ea16855b5..ce7787aef4b7 100644
    --- a/drivers/pci/controller/plda/pcie-plda.h
    +++ b/drivers/pci/controller/plda/pcie-plda.h
    @@ -137,6 +137,9 @@ struct plda_event {
    int msi_event;
    };

    +int plda_init_interrupts(struct platform_device *pdev,
    + struct plda_pcie_rp *port,
    + const struct plda_event *event);
    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
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      Last update: 2023-10-20 12:45    [W:5.837 / U:0.356 seconds]
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