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Message-Id: <20240614102403.13610-17-shivamurthy.shastri@linutronix.de>
Date: Fri, 14 Jun 2024 12:23:55 +0200
From: Shivamurthy Shastri <shivamurthy.shastri@...utronix.de>
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
linux-pci@...r.kernel.org,
maz@...nel.org,
tglx@...utronix.de,
anna-maria@...utronix.de,
shawnguo@...nel.org,
s.hauer@...gutronix.de,
festevam@...il.com,
bhelgaas@...gle.com,
rdunlap@...radead.org,
vidyas@...dia.com,
ilpo.jarvinen@...ux.intel.com,
apatel@...tanamicro.com,
kevin.tian@...el.com,
nipun.gupta@....com,
den@...inux.co.jp,
andrew@...n.ch,
gregory.clement@...tlin.com,
sebastian.hesselbarth@...il.com,
gregkh@...uxfoundation.org,
rafael@...nel.org,
alex.williamson@...hat.com,
will@...nel.org,
lorenzo.pieralisi@....com,
jgg@...lanox.com,
ammarfaizi2@...weeb.org,
robin.murphy@....com,
lpieralisi@...nel.org,
nm@...com,
kristo@...nel.org,
vkoul@...nel.org,
okaya@...nel.org,
agross@...nel.org,
andersson@...nel.org,
mark.rutland@....com,
shameerali.kolothum.thodi@...wei.com,
yuzenghui@...wei.com,
shivamurthy.shastri@...utronix.de
Subject: [PATCH v3 16/24] irqchip/gic-v2m: Switch to device MSI
From: Thomas Gleixner <tglx@...utronix.de>
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@...utronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Marc Zyngier <maz@...nel.org>
---
v3: enabled MSI_FLAG_PCI_MSI_MASK_PARENT in msi_parent_ops::supported_flags
---
drivers/irqchip/Kconfig | 1 +
drivers/irqchip/irq-gic-v2m.c | 80 +++++++++++------------------------
2 files changed, 25 insertions(+), 56 deletions(-)
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index b51863fa9b38..2104b8727b1a 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -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
diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c
index f2ff4387870d..428132aa26cc 100644
--- a/drivers/irqchip/irq-gic-v2m.c
+++ b/drivers/irqchip/irq-gic-v2m.c
@@ -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 +243,26 @@ static void __init gicv2m_teardown(void)
}
}
+#define GICV2M_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
+ MSI_FLAG_USE_DEF_CHIP_OPS)
+
+#define GICV2M_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK | \
+ MSI_FLAG_PCI_MSIX | \
+ MSI_FLAG_MULTI_PCI_MSI | \
+ MSI_FLAG_PCI_MSI_MASK_PARENT)
+
+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 +277,8 @@ 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 +479,7 @@ 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) {
--
2.34.1
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