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Message-Id: <20240614102403.13610-16-shivamurthy.shastri@linutronix.de>
Date: Fri, 14 Jun 2024 12:23:54 +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 15/24] genirq/gic-v3-mbi: Switch to MSI parent
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/irq-gic-v3-mbi.c | 127 +++++++++----------------------
1 file changed, 35 insertions(+), 92 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-mbi.c b/drivers/irqchip/irq-gic-v3-mbi.c
index 19298cc6c2ee..26b95027934e 100644
--- a/drivers/irqchip/irq-gic-v3-mbi.c
+++ b/drivers/irqchip/irq-gic-v3-mbi.c
@@ -18,6 +18,8 @@
#include <linux/irqchip/arm-gic-v3.h>
+#include "irq-msi-lib.h"
+
struct mbi_range {
u32 spi_start;
u32 nr_spis;
@@ -29,6 +31,15 @@ static phys_addr_t mbi_phys_base;
static struct mbi_range *mbi_ranges;
static unsigned int mbi_range_nr;
+static void mbi_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ msg[0].address_hi = upper_32_bits(mbi_phys_base + GICD_SETSPI_NSR);
+ msg[0].address_lo = lower_32_bits(mbi_phys_base + GICD_SETSPI_NSR);
+ msg[0].data = data->hwirq;
+
+ iommu_dma_compose_msi_msg(irq_data_get_msi_desc(data), msg);
+}
+
static struct irq_chip mbi_irq_chip = {
.name = "MBI",
.irq_mask = irq_chip_mask_parent,
@@ -36,11 +47,11 @@ static struct irq_chip mbi_irq_chip = {
.irq_eoi = irq_chip_eoi_parent,
.irq_set_type = irq_chip_set_type_parent,
.irq_set_affinity = irq_chip_set_affinity_parent,
+ .irq_compose_msi_msg = mbi_compose_msi_msg,
};
-static int mbi_irq_gic_domain_alloc(struct irq_domain *domain,
- unsigned int virq,
- irq_hw_number_t hwirq)
+static int mbi_irq_gic_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ irq_hw_number_t hwirq)
{
struct irq_fwspec fwspec;
struct irq_data *d;
@@ -138,85 +149,31 @@ static void mbi_irq_domain_free(struct irq_domain *domain,
}
static const struct irq_domain_ops mbi_domain_ops = {
+ .select = msi_lib_irq_domain_select,
.alloc = mbi_irq_domain_alloc,
.free = mbi_irq_domain_free,
};
-static void mbi_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
-{
- msg[0].address_hi = upper_32_bits(mbi_phys_base + GICD_SETSPI_NSR);
- msg[0].address_lo = lower_32_bits(mbi_phys_base + GICD_SETSPI_NSR);
- msg[0].data = data->parent_data->hwirq;
-
- iommu_dma_compose_msi_msg(irq_data_get_msi_desc(data), msg);
-}
-
-#ifdef CONFIG_PCI_MSI
-/* PCI-specific irqchip */
-static void mbi_mask_msi_irq(struct irq_data *d)
-{
- pci_msi_mask_irq(d);
- irq_chip_mask_parent(d);
-}
-
-static void mbi_unmask_msi_irq(struct irq_data *d)
-{
- pci_msi_unmask_irq(d);
- irq_chip_unmask_parent(d);
-}
-
-static struct irq_chip mbi_msi_irq_chip = {
- .name = "MSI",
- .irq_mask = mbi_mask_msi_irq,
- .irq_unmask = mbi_unmask_msi_irq,
- .irq_eoi = irq_chip_eoi_parent,
- .irq_compose_msi_msg = mbi_compose_msi_msg,
-};
-
-static struct msi_domain_info mbi_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 = &mbi_msi_irq_chip,
+#define MBI_MSI_FLAGS_REQUIRED (MSI_FLAG_USE_DEF_DOM_OPS | \
+ MSI_FLAG_USE_DEF_CHIP_OPS)
+
+#define MBI_MSI_FLAGS_SUPPORTED (MSI_GENERIC_FLAGS_MASK | \
+ MSI_FLAG_PCI_MSIX | \
+ MSI_FLAG_MULTI_PCI_MSI | \
+ MSI_FLAG_PCI_MSI_MASK_PARENT)
+
+static const struct msi_parent_ops gic_v3_mbi_msi_parent_ops = {
+ .supported_flags = MBI_MSI_FLAGS_SUPPORTED,
+ .required_flags = MBI_MSI_FLAGS_REQUIRED,
+ .bus_select_token = DOMAIN_BUS_NEXUS,
+ .bus_select_mask = MATCH_PCI_MSI | MATCH_PLATFORM_MSI,
+ .prefix = "MBI-",
+ .init_dev_msi_info = msi_lib_init_dev_msi_info,
};
-static int mbi_allocate_pci_domain(struct irq_domain *nexus_domain,
- struct irq_domain **pci_domain)
+static int mbi_allocate_domain(struct irq_domain *parent)
{
- *pci_domain = pci_msi_create_irq_domain(nexus_domain->parent->fwnode,
- &mbi_msi_domain_info,
- nexus_domain);
- if (!*pci_domain)
- return -ENOMEM;
-
- return 0;
-}
-#else
-static int mbi_allocate_pci_domain(struct irq_domain *nexus_domain,
- struct irq_domain **pci_domain)
-{
- *pci_domain = NULL;
- return 0;
-}
-#endif
-
-/* Platform-MSI specific irqchip */
-static struct irq_chip mbi_pmsi_irq_chip = {
- .name = "pMSI",
-};
-
-static struct msi_domain_ops mbi_pmsi_ops = {
-};
-
-static struct msi_domain_info mbi_pmsi_domain_info = {
- .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS),
- .ops = &mbi_pmsi_ops,
- .chip = &mbi_pmsi_irq_chip,
-};
-
-static int mbi_allocate_domains(struct irq_domain *parent)
-{
- struct irq_domain *nexus_domain, *pci_domain, *plat_domain;
- int err;
+ struct irq_domain *nexus_domain;
nexus_domain = irq_domain_create_hierarchy(parent, 0, 0, parent->fwnode,
&mbi_domain_ops, NULL);
@@ -224,22 +181,8 @@ static int mbi_allocate_domains(struct irq_domain *parent)
return -ENOMEM;
irq_domain_update_bus_token(nexus_domain, DOMAIN_BUS_NEXUS);
-
- err = mbi_allocate_pci_domain(nexus_domain, &pci_domain);
-
- plat_domain = platform_msi_create_irq_domain(parent->fwnode,
- &mbi_pmsi_domain_info,
- nexus_domain);
-
- if (err || !plat_domain) {
- if (plat_domain)
- irq_domain_remove(plat_domain);
- if (pci_domain)
- irq_domain_remove(pci_domain);
- irq_domain_remove(nexus_domain);
- return -ENOMEM;
- }
-
+ nexus_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
+ nexus_domain->msi_parent_ops = &gic_v3_mbi_msi_parent_ops;
return 0;
}
@@ -302,7 +245,7 @@ int __init mbi_init(struct fwnode_handle *fwnode, struct irq_domain *parent)
pr_info("Using MBI frame %pa\n", &mbi_phys_base);
- ret = mbi_allocate_domains(parent);
+ ret = mbi_allocate_domain(parent);
if (ret)
goto err_free_mbi;
--
2.34.1
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