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irqchip/gic-v2m: Switch to device MSI

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All platform MSI users and the PCI/MSI code handle per device MSI domains
when the irqdomain associated to the device provides MSI parent
functionality.

Remove the "global" PCI/MSI and platform domain related code and provide
the MSI parent functionality by filling in msi_parent_ops.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240623142235.514419280@linutronix.de
This commit is contained in:
Thomas Gleixner 2024-06-23 17:18:53 +02:00
parent da8ec7956e
commit 74e44454aa
2 changed files with 26 additions and 56 deletions
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1
drivers/irqchip/Kconfig
View File

@ -26,6 +26,7 @@ config ARM_GIC_V2M
bool
depends on PCI
select ARM_GIC
select IRQ_MSI_LIB
select PCI_MSI
config GIC_NON_BANKED

81
drivers/irqchip/irq-gic-v2m.c
View File

@ -26,6 +26,8 @@
#include <linux/irqchip/arm-gic.h>
#include <linux/irqchip/arm-gic-common.h>
#include "irq-msi-lib.h"
/*
* MSI_TYPER:
* [31:26] Reserved
@ -72,31 +74,6 @@ struct v2m_data {
u32 flags; /* v2m flags for specific implementation */
};
static void gicv2m_mask_msi_irq(struct irq_data *d)
{
pci_msi_mask_irq(d);
irq_chip_mask_parent(d);
}
static void gicv2m_unmask_msi_irq(struct irq_data *d)
{
pci_msi_unmask_irq(d);
irq_chip_unmask_parent(d);
}
static struct irq_chip gicv2m_msi_irq_chip = {
.name = "MSI",
.irq_mask = gicv2m_mask_msi_irq,
.irq_unmask = gicv2m_unmask_msi_irq,
.irq_eoi = irq_chip_eoi_parent,
};
static struct msi_domain_info gicv2m_msi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
MSI_FLAG_PCI_MSIX | MSI_FLAG_MULTI_PCI_MSI),
.chip = &gicv2m_msi_irq_chip,
};
static phys_addr_t gicv2m_get_msi_addr(struct v2m_data *v2m, int hwirq)
{
if (v2m->flags & GICV2M_GRAVITON_ADDRESS_ONLY)
@ -230,6 +207,7 @@ static void gicv2m_irq_domain_free(struct irq_domain *domain,
}
static const struct irq_domain_ops gicv2m_domain_ops = {
.select = msi_lib_irq_domain_select,
.alloc = gicv2m_irq_domain_alloc,
.free = gicv2m_irq_domain_free,
};
@ -250,19 +228,6 @@ static bool is_msi_spi_valid(u32 base, u32 num)
return true;
}
static struct irq_chip gicv2m_pmsi_irq_chip = {
.name = "pMSI",
};
static struct msi_domain_ops gicv2m_pmsi_ops = {
};
static struct msi_domain_info gicv2m_pmsi_domain_info = {
.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
.ops = &gicv2m_pmsi_ops,
.chip = &gicv2m_pmsi_irq_chip,
};
static void __init gicv2m_teardown(void)
{
struct v2m_data *v2m, *tmp;
@ -278,9 +243,27 @@ static void __init gicv2m_teardown(void)
}
}
#define GICV2M_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
MSI_FLAG_USE_DEF_CHIP_OPS | \
MSI_FLAG_PCI_MSI_MASK_PARENT)
#define GICV2M_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK | \
MSI_FLAG_PCI_MSIX | \
MSI_FLAG_MULTI_PCI_MSI)
static struct msi_parent_ops gicv2m_msi_parent_ops = {
.supported_flags = GICV2M_MSI_FLAGS_SUPPORTED,
.required_flags = GICV2M_MSI_FLAGS_REQUIRED,
.bus_select_token = DOMAIN_BUS_NEXUS,
.bus_select_mask = MATCH_PCI_MSI | MATCH_PLATFORM_MSI,
.prefix = "GICv2m-",
.init_dev_msi_info = msi_lib_init_dev_msi_info,
};
static __init int gicv2m_allocate_domains(struct irq_domain *parent)
{
struct irq_domain *inner_domain, *pci_domain, *plat_domain;
struct irq_domain *inner_domain;
struct v2m_data *v2m;
v2m = list_first_entry_or_null(&v2m_nodes, struct v2m_data, entry);
@ -295,22 +278,8 @@ static __init int gicv2m_allocate_domains(struct irq_domain *parent)
}
irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS);
pci_domain = pci_msi_create_irq_domain(v2m->fwnode,
&gicv2m_msi_domain_info,
inner_domain);
plat_domain = platform_msi_create_irq_domain(v2m->fwnode,
&gicv2m_pmsi_domain_info,
inner_domain);
if (!pci_domain || !plat_domain) {
pr_err("Failed to create MSI domains\n");
if (plat_domain)
irq_domain_remove(plat_domain);
if (pci_domain)
irq_domain_remove(pci_domain);
irq_domain_remove(inner_domain);
return -ENOMEM;
}
inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
inner_domain->msi_parent_ops = &gicv2m_msi_parent_ops;
return 0;
}
@ -511,7 +480,7 @@ acpi_parse_madt_msi(union acpi_subtable_headers *header,
pr_info("applying Amazon Graviton quirk\n");
res.end = res.start + SZ_8K - 1;
flags |= GICV2M_GRAVITON_ADDRESS_ONLY;
gicv2m_msi_domain_info.flags &= ~MSI_FLAG_MULTI_PCI_MSI;
gicv2m_msi_parent_ops.supported_flags &= ~MSI_FLAG_MULTI_PCI_MSI;
}
if (m->flags & ACPI_MADT_OVERRIDE_SPI_VALUES) {