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irqchip/sg2042-msi: Add the Sophgo SG2044 MSI interrupt controller

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Add support for Sophgo SG2044 MSI interrupt controller.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Chen Wang <wangchen20@iscas.ac.cn> # SG2042
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
Link: https://lore.kernel.org/all/20250413224922.69719-5-inochiama@gmail.com
This commit is contained in:
Inochi Amaoto 2025-04-14 06:49:15 +08:00 committed by Thomas Gleixner
parent bad2094e3b
commit e96b93a97c
1 changed files with 51 additions and 2 deletions
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53
drivers/irqchip/irq-sg2042-msi.c
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@ -94,6 +94,35 @@ static const struct irq_chip sg2042_msi_middle_irq_chip = {
.irq_compose_msi_msg = sg2042_msi_irq_compose_msi_msg,
};
static void sg2044_msi_irq_ack(struct irq_data *d)
{
struct sg204x_msi_chipdata *data = irq_data_get_irq_chip_data(d);
writel(0, (u32 *)data->reg_clr + d->hwirq);
irq_chip_ack_parent(d);
}
static void sg2044_msi_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg)
{
struct sg204x_msi_chipdata *data = irq_data_get_irq_chip_data(d);
phys_addr_t doorbell = data->doorbell_addr + 4 * (d->hwirq / 32);
msg->address_lo = lower_32_bits(doorbell);
msg->address_hi = upper_32_bits(doorbell);
msg->data = d->hwirq % 32;
}
static struct irq_chip sg2044_msi_middle_irq_chip = {
.name = "SG2044 MSI",
.irq_ack = sg2044_msi_irq_ack,
.irq_mask = irq_chip_mask_parent,
.irq_unmask = irq_chip_unmask_parent,
#ifdef CONFIG_SMP
.irq_set_affinity = irq_chip_set_affinity_parent,
#endif
.irq_compose_msi_msg = sg2044_msi_irq_compose_msi_msg,
};
static int sg204x_msi_parent_domain_alloc(struct irq_domain *domain, unsigned int virq, int hwirq)
{
struct sg204x_msi_chipdata *data = domain->host_data;
@ -132,13 +161,11 @@ static int sg204x_msi_middle_domain_alloc(struct irq_domain *domain, unsigned in
irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
data->chip_info->irqchip, data);
}
return 0;
err_hwirq:
sg204x_msi_free_hwirq(data, hwirq, nr_irqs);
irq_domain_free_irqs_parent(domain, virq, i);
return err;
}
@ -172,6 +199,22 @@ static const struct msi_parent_ops sg2042_msi_parent_ops = {
.init_dev_msi_info = msi_lib_init_dev_msi_info,
};
#define SG2044_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
MSI_FLAG_USE_DEF_CHIP_OPS)
#define SG2044_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK | \
MSI_FLAG_PCI_MSIX)
static const struct msi_parent_ops sg2044_msi_parent_ops = {
.required_flags = SG2044_MSI_FLAGS_REQUIRED,
.supported_flags = SG2044_MSI_FLAGS_SUPPORTED,
.chip_flags = MSI_CHIP_FLAG_SET_EOI | MSI_CHIP_FLAG_SET_ACK,
.bus_select_mask = MATCH_PCI_MSI,
.bus_select_token = DOMAIN_BUS_NEXUS,
.prefix = "SG2044-",
.init_dev_msi_info = msi_lib_init_dev_msi_info,
};
static int sg204x_msi_init_domains(struct sg204x_msi_chipdata *data,
struct irq_domain *plic_domain, struct device *dev)
{
@ -265,8 +308,14 @@ static const struct sg204x_msi_chip_info sg2042_chip_info = {
.parent_ops = &sg2042_msi_parent_ops,
};
static const struct sg204x_msi_chip_info sg2044_chip_info = {
.irqchip = &sg2044_msi_middle_irq_chip,
.parent_ops = &sg2044_msi_parent_ops,
};
static const struct of_device_id sg2042_msi_of_match[] = {
{ .compatible = "sophgo,sg2042-msi", .data = &sg2042_chip_info },
{ .compatible = "sophgo,sg2044-msi", .data = &sg2044_chip_info },
{ }
};