The following commit has been merged into the irq/drivers branch of tip:
Commit-ID: fe35ecee8ec8d42b1d24ed70e5b33192294bcef0
Gitweb: https://git.kernel.org/tip/fe35ecee8ec8d42b1d24ed70e5b33192294bcef0
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Mon, 17 Feb 2025 14:26:49 +05:30
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 20 Feb 2025 15:19:26 +01:00
irqchip/riscv-imsic: Move to common MSI library
Simplify the leaf MSI domain handling in the RISC-V IMSIC driver by
using msi_lib_init_dev_msi_info() and msi_lib_irq_domain_select()
provided by the common MSI library.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20250217085657.789309-4-apatel@xxxxxxxxxxxxxxxx
---
drivers/irqchip/Kconfig | 8 +-
drivers/irqchip/irq-riscv-imsic-platform.c | 114 +--------------------
2 files changed, 6 insertions(+), 116 deletions(-)
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index be063bf..bc3f12a 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -589,13 +589,7 @@ config RISCV_IMSIC
select IRQ_DOMAIN_HIERARCHY
select GENERIC_IRQ_MATRIX_ALLOCATOR
select GENERIC_MSI_IRQ
-
-config RISCV_IMSIC_PCI
- bool
- depends on RISCV_IMSIC
- depends on PCI
- depends on PCI_MSI
- default RISCV_IMSIC
+ select IRQ_MSI_LIB
config SIFIVE_PLIC
bool
diff --git a/drivers/irqchip/irq-riscv-imsic-platform.c b/drivers/irqchip/irq-riscv-imsic-platform.c
index 5d7c30a..9a5e7b4 100644
--- a/drivers/irqchip/irq-riscv-imsic-platform.c
+++ b/drivers/irqchip/irq-riscv-imsic-platform.c
@@ -20,6 +20,7 @@
#include <linux/spinlock.h>
#include <linux/smp.h>
+#include "irq-msi-lib.h"
#include "irq-riscv-imsic-state.h"
static bool imsic_cpu_page_phys(unsigned int cpu, unsigned int guest_index,
@@ -174,22 +175,6 @@ static void imsic_irq_domain_free(struct irq_domain *domain, unsigned int virq,
irq_domain_free_irqs_parent(domain, virq, nr_irqs);
}
-static int imsic_irq_domain_select(struct irq_domain *domain, struct irq_fwspec *fwspec,
- enum irq_domain_bus_token bus_token)
-{
- const struct msi_parent_ops *ops = domain->msi_parent_ops;
- u32 busmask = BIT(bus_token);
-
- if (fwspec->fwnode != domain->fwnode || fwspec->param_count != 0)
- return 0;
-
- /* Handle pure domain searches */
- if (bus_token == ops->bus_select_token)
- return 1;
-
- return !!(ops->bus_select_mask & busmask);
-}
-
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
static void imsic_irq_debug_show(struct seq_file *m, struct irq_domain *d,
struct irq_data *irqd, int ind)
@@ -206,110 +191,21 @@ static void imsic_irq_debug_show(struct seq_file *m, struct irq_domain *d,
static const struct irq_domain_ops imsic_base_domain_ops = {
.alloc = imsic_irq_domain_alloc,
.free = imsic_irq_domain_free,
- .select = imsic_irq_domain_select,
+ .select = msi_lib_irq_domain_select,
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
.debug_show = imsic_irq_debug_show,
#endif
};
-#ifdef CONFIG_RISCV_IMSIC_PCI
-
-static void imsic_pci_mask_irq(struct irq_data *d)
-{
- pci_msi_mask_irq(d);
- irq_chip_mask_parent(d);
-}
-
-static void imsic_pci_unmask_irq(struct irq_data *d)
-{
- irq_chip_unmask_parent(d);
- pci_msi_unmask_irq(d);
-}
-
-#define MATCH_PCI_MSI BIT(DOMAIN_BUS_PCI_MSI)
-
-#else
-
-#define MATCH_PCI_MSI 0
-
-#endif
-
-static bool imsic_init_dev_msi_info(struct device *dev,
- struct irq_domain *domain,
- struct irq_domain *real_parent,
- struct msi_domain_info *info)
-{
- const struct msi_parent_ops *pops = real_parent->msi_parent_ops;
-
- /* MSI parent domain specific settings */
- switch (real_parent->bus_token) {
- case DOMAIN_BUS_NEXUS:
- if (WARN_ON_ONCE(domain != real_parent))
- return false;
-#ifdef CONFIG_SMP
- info->chip->irq_set_affinity = irq_chip_set_affinity_parent;
-#endif
- break;
- default:
- WARN_ON_ONCE(1);
- return false;
- }
-
- /* Is the target supported? */
- switch (info->bus_token) {
-#ifdef CONFIG_RISCV_IMSIC_PCI
- case DOMAIN_BUS_PCI_DEVICE_MSI:
- case DOMAIN_BUS_PCI_DEVICE_MSIX:
- info->chip->irq_mask = imsic_pci_mask_irq;
- info->chip->irq_unmask = imsic_pci_unmask_irq;
- break;
-#endif
- case DOMAIN_BUS_DEVICE_MSI:
- /*
- * Per-device MSI should never have any MSI feature bits
- * set. It's sole purpose is to create a dumb interrupt
- * chip which has a device specific irq_write_msi_msg()
- * callback.
- */
- if (WARN_ON_ONCE(info->flags))
- return false;
-
- /* Core managed MSI descriptors */
- info->flags |= MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS |
- MSI_FLAG_FREE_MSI_DESCS;
- break;
- case DOMAIN_BUS_WIRED_TO_MSI:
- break;
- default:
- WARN_ON_ONCE(1);
- return false;
- }
-
- /* Use hierarchial chip operations re-trigger */
- info->chip->irq_retrigger = irq_chip_retrigger_hierarchy;
-
- /*
- * Mask out the domain specific MSI feature flags which are not
- * supported by the real parent.
- */
- info->flags &= pops->supported_flags;
-
- /* Enforce the required flags */
- info->flags |= pops->required_flags;
-
- return true;
-}
-
-#define MATCH_PLATFORM_MSI BIT(DOMAIN_BUS_PLATFORM_MSI)
-
static const struct msi_parent_ops imsic_msi_parent_ops = {
.supported_flags = MSI_GENERIC_FLAGS_MASK |
MSI_FLAG_PCI_MSIX,
.required_flags = MSI_FLAG_USE_DEF_DOM_OPS |
- MSI_FLAG_USE_DEF_CHIP_OPS,
+ MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_PCI_MSI_MASK_PARENT,
.bus_select_token = DOMAIN_BUS_NEXUS,
.bus_select_mask = MATCH_PCI_MSI | MATCH_PLATFORM_MSI,
- .init_dev_msi_info = imsic_init_dev_msi_info,
+ .init_dev_msi_info = msi_lib_init_dev_msi_info,
};
int imsic_irqdomain_init(void)
|