Linus,
please pull the latest irq/msi branch from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-msi-2024-03-10
up to: 678c607ecf8a: irqchip/riscv-intc: Fix low-level interrupt handler setup for AIA
Updates for the MSI interrupt subsystem and RISC-V initial MSI support:
- Core and platform-MSI
The core changes have been adopted from previous work which converted
ARM[64] to the new per device MSI domain model, which was merged to
support multiple MSI domain per device. The ARM[64] changes are being
worked on too, but have not been ready yet. The core and platform-MSI
changes have been split out to not hold up RISC-V and to avoid that
RISC-V builds on the scheduled for removal interfaces.
The core support provides new interfaces to handle wire to MSI bridges
in a straight forward way and introduces new platform-MSI interfaces
which are built on top of the per device MSI domain model.
Once ARM[64] is converted over the old platform-MSI interfaces and the
related ugliness in the MSI core code will be removed.
- Drivers:
- Add a new driver for the Andes hart-level interrupt controller
- Rework the SiFive PLIC driver to prepare for MSI suport
- Expand the RISC-V INTC driver to support the new RISC-V AIA
controller which provides the basis for MSI on RISC-V
- A few fixup for the fallout of the core changes.
The actual MSI parts for RISC-V were finalized late and have been
post-poned for the next merge window.
Thanks,
tglx
------------------>
Anup Patel (9):
irqchip/sifive-plic: Convert PLIC driver into a platform driver
irqchip/sifive-plic: Use dev_xyz() in-place of pr_xyz()
irqchip/sifive-plic: Use devm_xyz() for managed allocation
irqchip/sifive-plic: Use riscv_get_intc_hwnode() to get parent fwnode
irqchip/sifive-plic: Cleanup PLIC contexts upon irqdomain creation failure
irqchip/sifive-plic: Parse number of interrupts and contexts early in plic_probe()
irqchip/sifive-plic: Improve locking safety by using irqsave/irqrestore
irqchip/riscv-intc: Add support for RISC-V AIA
irqchip/riscv-intc: Fix low-level interrupt handler setup for AIA
Björn Töpel (1):
genirq/matrix: Dynamic bitmap allocation
Marc Zyngier (1):
genirq/irqdomain: Don't call ops->select for DOMAIN_BUS_ANY tokens
Thomas Gleixner (16):
irqchip/gic-v3: Make gic_irq_domain_select() robust for zero parameter count
genirq/irqdomain: Remove the param count restriction from select()
genirq/msi: Extend msi_parent_ops
genirq/irqdomain: Add DOMAIN_BUS_DEVICE_MSI
platform-msi: Prepare for real per device domains
irqchip: Convert all platform MSI users to the new API
platform-msi: Remove unused interfaces
genirq/msi: Provide optional translation op
genirq/msi: Split msi_domain_alloc_irq_at()
genirq/msi: Provide DOMAIN_BUS_WIRED_TO_MSI
genirq/msi: Optionally use dev->fwnode for device domain
genirq/msi: Provide allocation/free functions for "wired" MSI interrupts
genirq/irqdomain: Reroute device MSI create_mapping
genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV
irqchip/imx-intmux: Handle pure domain searches correctly
x86/apic/msi: Use DOMAIN_BUS_GENERIC_MSI for HPET/IO-APIC domain search
Yu Chien Peter Lin (2):
irqchip/riscv-intc: Allow large non-standard interrupt number
irqchip/riscv-intc: Introduce Andes hart-level interrupt controller
arch/x86/include/asm/hw_irq.h | 2 -
arch/x86/kernel/apic/io_apic.c | 2 +-
arch/x86/kernel/hpet.c | 2 +-
drivers/base/platform-msi.c | 119 ++++++++++--
drivers/dma/mv_xor_v2.c | 8 +-
drivers/dma/qcom/hidma.c | 6 +-
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 5 +-
drivers/irqchip/irq-gic-v3.c | 6 +-
drivers/irqchip/irq-imx-intmux.c | 4 +
drivers/irqchip/irq-riscv-intc.c | 104 +++++++++--
drivers/irqchip/irq-sifive-plic.c | 275 +++++++++++++++++-----------
drivers/mailbox/bcm-flexrm-mailbox.c | 8 +-
drivers/perf/arm_smmuv3_pmu.c | 4 +-
drivers/ufs/host/ufs-qcom.c | 8 +-
include/linux/irqdomain.h | 17 ++
include/linux/irqdomain_defs.h | 2 +
include/linux/msi.h | 24 ++-
include/linux/soc/andes/irq.h | 18 ++
kernel/irq/irqdomain.c | 28 ++-
kernel/irq/matrix.c | 28 +--
kernel/irq/msi.c | 184 +++++++++++++++----
21 files changed, 637 insertions(+), 217 deletions(-)
create mode 100644 include/linux/soc/andes/irq.h
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index b02c3cd3c0f6..edebf1020e04 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -16,8 +16,6 @@
#include <asm/irq_vectors.h>
-#define IRQ_MATRIX_BITS NR_VECTORS
-
#ifndef __ASSEMBLY__
#include <linux/percpu.h>
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 40c7cf180c20..e66c77529ca9 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2354,7 +2354,7 @@ static int mp_irqdomain_create(int ioapic)
fwspec.param_count = 1;
fwspec.param[0] = mpc_ioapic_id(ioapic);
- parent = irq_find_matching_fwspec(&fwspec, DOMAIN_BUS_ANY);
+ parent = irq_find_matching_fwspec(&fwspec, DOMAIN_BUS_GENERIC_MSI);
if (!parent) {
if (!cfg->dev)
irq_domain_free_fwnode(fn);
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index a38d0c93a66e..c96ae8fee95e 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -568,7 +568,7 @@ static struct irq_domain *hpet_create_irq_domain(int hpet_id)
fwspec.param_count = 1;
fwspec.param[0] = hpet_id;
- parent = irq_find_matching_fwspec(&fwspec, DOMAIN_BUS_ANY);
+ parent = irq_find_matching_fwspec(&fwspec, DOMAIN_BUS_GENERIC_MSI);
if (!parent) {
irq_domain_free_fwnode(fn);
kfree(domain_info);
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index f37ad34c80ec..0d01890160f3 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -13,6 +13,8 @@
#include <linux/msi.h>
#include <linux/slab.h>
+/* Begin of removal area. Once everything is converted over. Cleanup the includes too! */
+
#define DEV_ID_SHIFT 21
#define MAX_DEV_MSIS (1 << (32 - DEV_ID_SHIFT))
@@ -204,8 +206,8 @@ static void platform_msi_free_priv_data(struct device *dev)
* Returns:
* Zero for success, or an error code in case of failure
*/
-int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
- irq_write_msi_msg_t write_msi_msg)
+static int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg)
{
int err;
@@ -219,18 +221,6 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
return err;
}
-EXPORT_SYMBOL_GPL(platform_msi_domain_alloc_irqs);
-
-/**
- * platform_msi_domain_free_irqs - Free MSI interrupts for @dev
- * @dev: The device for which to free interrupts
- */
-void platform_msi_domain_free_irqs(struct device *dev)
-{
- msi_domain_free_irqs_all(dev, MSI_DEFAULT_DOMAIN);
- platform_msi_free_priv_data(dev);
-}
-EXPORT_SYMBOL_GPL(platform_msi_domain_free_irqs);
/**
* platform_msi_get_host_data - Query the private data associated with
@@ -350,3 +340,104 @@ int platform_msi_device_domain_alloc(struct irq_domain *domain, unsigned int vir
return msi_domain_populate_irqs(domain->parent, dev, virq, nr_irqs, &data->arg);
}
+
+/* End of removal area */
+
+/* Real per device domain interfaces */
+
+/*
+ * This indirection can go when platform_device_msi_init_and_alloc_irqs()
+ * is switched to a proper irq_chip::irq_write_msi_msg() callback. Keep it
+ * simple for now.
+ */
+static void platform_msi_write_msi_msg(struct irq_data *d, struct msi_msg *msg)
+{
+ irq_write_msi_msg_t cb = d->chip_data;
+
+ cb(irq_data_get_msi_desc(d), msg);
+}
+
+static void platform_msi_set_desc_byindex(msi_alloc_info_t *arg, struct msi_desc *desc)
+{
+ arg->desc = desc;
+ arg->hwirq = desc->msi_index;
+}
+
+static const struct msi_domain_template platform_msi_template = {
+ .chip = {
+ .name = "pMSI",
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_write_msi_msg = platform_msi_write_msi_msg,
+ /* The rest is filled in by the platform MSI parent */
+ },
+
+ .ops = {
+ .set_desc = platform_msi_set_desc_byindex,
+ },
+
+ .info = {
+ .bus_token = DOMAIN_BUS_DEVICE_MSI,
+ },
+};
+
+/**
+ * platform_device_msi_init_and_alloc_irqs - Initialize platform device MSI
+ * and allocate interrupts for @dev
+ * @dev: The device for which to allocate interrupts
+ * @nvec: The number of interrupts to allocate
+ * @write_msi_msg: Callback to write an interrupt message for @dev
+ *
+ * Returns:
+ * Zero for success, or an error code in case of failure
+ *
+ * This creates a MSI domain on @dev which has @dev->msi.domain as
+ * parent. The parent domain sets up the new domain. The domain has
+ * a fixed size of @nvec. The domain is managed by devres and will
+ * be removed when the device is removed.
+ *
+ * Note: For migration purposes this falls back to the original platform_msi code
+ * up to the point where all platforms have been converted to the MSI
+ * parent model.
+ */
+int platform_device_msi_init_and_alloc_irqs(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg)
+{
+ struct irq_domain *domain = dev->msi.domain;
+
+ if (!domain || !write_msi_msg)
+ return -EINVAL;
+
+ /* Migration support. Will go away once everything is converted */
+ if (!irq_domain_is_msi_parent(domain))
+ return platform_msi_domain_alloc_irqs(dev, nvec, write_msi_msg);
+
+ /*
+ * @write_msi_msg is stored in the resulting msi_domain_info::data.
+ * The underlying domain creation mechanism will assign that
+ * callback to the resulting irq chip.
+ */
+ if (!msi_create_device_irq_domain(dev, MSI_DEFAULT_DOMAIN,
+ &platform_msi_template,
+ nvec, NULL, write_msi_msg))
+ return -ENODEV;
+
+ return msi_domain_alloc_irqs_range(dev, MSI_DEFAULT_DOMAIN, 0, nvec - 1);
+}
+EXPORT_SYMBOL_GPL(platform_device_msi_init_and_alloc_irqs);
+
+/**
+ * platform_device_msi_free_irqs_all - Free all interrupts for @dev
+ * @dev: The device for which to free interrupts
+ */
+void platform_device_msi_free_irqs_all(struct device *dev)
+{
+ struct irq_domain *domain = dev->msi.domain;
+
+ msi_domain_free_irqs_all(dev, MSI_DEFAULT_DOMAIN);
+
+ /* Migration support. Will go away once everything is converted */
+ if (!irq_domain_is_msi_parent(domain))
+ platform_msi_free_priv_data(dev);
+}
+EXPORT_SYMBOL_GPL(platform_device_msi_free_irqs_all);
diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index 1ebfbe88e733..97ebc791a30b 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -747,8 +747,8 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
if (IS_ERR(xor_dev->clk))
return PTR_ERR(xor_dev->clk);
- ret = platform_msi_domain_alloc_irqs(&pdev->dev, 1,
- mv_xor_v2_set_msi_msg);
+ ret = platform_device_msi_init_and_alloc_irqs(&pdev->dev, 1,
+ mv_xor_v2_set_msi_msg);
if (ret)
return ret;
@@ -851,7 +851,7 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
xor_dev->desc_size * MV_XOR_V2_DESC_NUM,
xor_dev->hw_desq_virt, xor_dev->hw_desq);
free_msi_irqs:
- platform_msi_domain_free_irqs(&pdev->dev);
+ platform_device_msi_free_irqs_all(&pdev->dev);
return ret;
}
@@ -867,7 +867,7 @@ static void mv_xor_v2_remove(struct platform_device *pdev)
devm_free_irq(&pdev->dev, xor_dev->irq, xor_dev);
- platform_msi_domain_free_irqs(&pdev->dev);
+ platform_device_msi_free_irqs_all(&pdev->dev);
tasklet_kill(&xor_dev->irq_tasklet);
}
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index d63b93dc7047..202ac95227cb 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -696,7 +696,7 @@ static void hidma_free_msis(struct hidma_dev *dmadev)
devm_free_irq(dev, virq, &dmadev->lldev);
}
- platform_msi_domain_free_irqs(dev);
+ platform_device_msi_free_irqs_all(dev);
#endif
}
@@ -706,8 +706,8 @@ static int hidma_request_msi(struct hidma_dev *dmadev,
#ifdef CONFIG_GENERIC_MSI_IRQ
int rc, i, virq;
- rc = platform_msi_domain_alloc_irqs(&pdev->dev, HIDMA_MSI_INTS,
- hidma_write_msi_msg);
+ rc = platform_device_msi_init_and_alloc_irqs(&pdev->dev, HIDMA_MSI_INTS,
+ hidma_write_msi_msg);
if (rc)
return rc;
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 0ffb1cf17e0b..a74a509bcd63 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3125,7 +3125,8 @@ static int arm_smmu_update_gbpa(struct arm_smmu_device *smmu, u32 set, u32 clr)
static void arm_smmu_free_msis(void *data)
{
struct device *dev = data;
- platform_msi_domain_free_irqs(dev);
+
+ platform_device_msi_free_irqs_all(dev);
}
static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
@@ -3166,7 +3167,7 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
}
/* Allocate MSIs for evtq, gerror and priq. Ignore cmdq */
- ret = platform_msi_domain_alloc_irqs(dev, nvec, arm_smmu_write_msi_msg);
+ ret = platform_device_msi_init_and_alloc_irqs(dev, nvec, arm_smmu_write_msi_msg);
if (ret) {
dev_warn(dev, "failed to allocate MSIs - falling back to wired irqs\n");
return;
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 98b0329b7154..35b9362d178f 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1702,9 +1702,13 @@ static int gic_irq_domain_select(struct irq_domain *d,
irq_hw_number_t hwirq;
/* Not for us */
- if (fwspec->fwnode != d->fwnode)
+ if (fwspec->fwnode != d->fwnode)
return 0;
+ /* Handle pure domain searches */
+ if (!fwspec->param_count)
+ return d->bus_token == bus_token;
+
/* If this is not DT, then we have a single domain */
if (!is_of_node(fwspec->fwnode))
return 1;
diff --git a/drivers/irqchip/irq-imx-intmux.c b/drivers/irqchip/irq-imx-intmux.c
index aa041e4dfee0..65084c7619b0 100644
--- a/drivers/irqchip/irq-imx-intmux.c
+++ b/drivers/irqchip/irq-imx-intmux.c
@@ -166,6 +166,10 @@ static int imx_intmux_irq_select(struct irq_domain *d, struct irq_fwspec *fwspec
if (fwspec->fwnode != d->fwnode)
return false;
+ /* Handle pure domain searches */
+ if (!fwspec->param_count)
+ return d->bus_token == bus_token;
+
return irqchip_data->chanidx == fwspec->param[1];
}
diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index e8d01b14ccdd..f87aeab460eb 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -17,17 +17,29 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/smp.h>
+#include <linux/soc/andes/irq.h>
+
+#include <asm/hwcap.h>
static struct irq_domain *intc_domain;
+static unsigned int riscv_intc_nr_irqs __ro_after_init = BITS_PER_LONG;
+static unsigned int riscv_intc_custom_base __ro_after_init = BITS_PER_LONG;
+static unsigned int riscv_intc_custom_nr_irqs __ro_after_init;
static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
{
unsigned long cause = regs->cause & ~CAUSE_IRQ_FLAG;
- if (unlikely(cause >= BITS_PER_LONG))
- panic("unexpected interrupt cause");
+ if (generic_handle_domain_irq(intc_domain, cause))
+ pr_warn_ratelimited("Failed to handle interrupt (cause: %ld)\n", cause);
+}
+
+static asmlinkage void riscv_intc_aia_irq(struct pt_regs *regs)
+{
+ unsigned long topi;
- generic_handle_domain_irq(intc_domain, cause);
+ while ((topi = csr_read(CSR_TOPI)))
+ generic_handle_domain_irq(intc_domain, topi >> TOPI_IID_SHIFT);
}
/*
@@ -39,12 +51,43 @@ static asmlinkage void riscv_intc_irq(struct pt_regs *regs)
static void riscv_intc_irq_mask(struct irq_data *d)
{
- csr_clear(CSR_IE, BIT(d->hwirq));
+ if (IS_ENABLED(CONFIG_32BIT) && d->hwirq >= BITS_PER_LONG)
+ csr_clear(CSR_IEH, BIT(d->hwirq - BITS_PER_LONG));
+ else
+ csr_clear(CSR_IE, BIT(d->hwirq));
}
static void riscv_intc_irq_unmask(struct irq_data *d)
{
- csr_set(CSR_IE, BIT(d->hwirq));
+ if (IS_ENABLED(CONFIG_32BIT) && d->hwirq >= BITS_PER_LONG)
+ csr_set(CSR_IEH, BIT(d->hwirq - BITS_PER_LONG));
+ else
+ csr_set(CSR_IE, BIT(d->hwirq));
+}
+
+static void andes_intc_irq_mask(struct irq_data *d)
+{
+ /*
+ * Andes specific S-mode local interrupt causes (hwirq)
+ * are defined as (256 + n) and controlled by n-th bit
+ * of SLIE.
+ */
+ unsigned int mask = BIT(d->hwirq % BITS_PER_LONG);
+
+ if (d->hwirq < ANDES_SLI_CAUSE_BASE)
+ csr_clear(CSR_IE, mask);
+ else
+ csr_clear(ANDES_CSR_SLIE, mask);
+}
+
+static void andes_intc_irq_unmask(struct irq_data *d)
+{
+ unsigned int mask = BIT(d->hwirq % BITS_PER_LONG);
+
+ if (d->hwirq < ANDES_SLI_CAUSE_BASE)
+ csr_set(CSR_IE, mask);
+ else
+ csr_set(ANDES_CSR_SLIE, mask);
}
static void riscv_intc_irq_eoi(struct irq_data *d)
@@ -70,12 +113,21 @@ static struct irq_chip riscv_intc_chip = {
.irq_eoi = riscv_intc_irq_eoi,
};
+static struct irq_chip andes_intc_chip = {
+ .name = "RISC-V INTC",
+ .irq_mask = andes_intc_irq_mask,
+ .irq_unmask = andes_intc_irq_unmask,
+ .irq_eoi = riscv_intc_irq_eoi,
+};
+
static int riscv_intc_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hwirq)
{
+ struct irq_chip *chip = d->host_data;
+
irq_set_percpu_devid(irq);
- irq_domain_set_info(d, irq, hwirq, &riscv_intc_chip, d->host_data,
- handle_percpu_devid_irq, NULL, NULL);
+ irq_domain_set_info(d, irq, hwirq, chip, NULL, handle_percpu_devid_irq,
+ NULL, NULL);
return 0;
}
@@ -93,6 +145,14 @@ static int riscv_intc_domain_alloc(struct irq_domain *domain,
if (ret)
return ret;
+ /*
+ * Only allow hwirq for which we have corresponding standard or
+ * custom interrupt enable register.
+ */
+ if ((hwirq >= riscv_intc_nr_irqs && hwirq < riscv_intc_custom_base) ||
+ (hwirq >= riscv_intc_custom_base + riscv_intc_custom_nr_irqs))
+ return -EINVAL;
+
for (i = 0; i < nr_irqs; i++) {
ret = riscv_intc_domain_map(domain, virq + i, hwirq + i);
if (ret)
@@ -113,18 +173,20 @@ static struct fwnode_handle *riscv_intc_hwnode(void)
return intc_domain->fwnode;
}
-static int __init riscv_intc_init_common(struct fwnode_handle *fn)
+static int __init riscv_intc_init_common(struct fwnode_handle *fn, struct irq_chip *chip)
{
int rc;
- intc_domain = irq_domain_create_linear(fn, BITS_PER_LONG,
- &riscv_intc_domain_ops, NULL);
+ intc_domain = irq_domain_create_tree(fn, &riscv_intc_domain_ops, chip);
if (!intc_domain) {
pr_err("unable to add IRQ domain\n");
return -ENXIO;
}
- rc = set_handle_irq(&riscv_intc_irq);
+ if (riscv_isa_extension_available(NULL, SxAIA))
+ rc = set_handle_irq(&riscv_intc_aia_irq);
+ else
+ rc = set_handle_irq(&riscv_intc_irq);
if (rc) {
pr_err("failed to set irq handler\n");
return rc;
@@ -132,7 +194,11 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
riscv_set_intc_hwnode_fn(riscv_intc_hwnode);
- pr_info("%d local interrupts mapped\n", BITS_PER_LONG);
+ pr_info("%d local interrupts mapped%s\n",
+ riscv_isa_extension_available(NULL, SxAIA) ? 64 : riscv_intc_nr_irqs,
+ riscv_isa_extension_available(NULL, SxAIA) ? " using AIA" : "");
+ if (riscv_intc_custom_nr_irqs)
+ pr_info("%d custom local interrupts mapped\n", riscv_intc_custom_nr_irqs);
return 0;
}
@@ -140,8 +206,9 @@ static int __init riscv_intc_init_common(struct fwnode_handle *fn)
static int __init riscv_intc_init(struct device_node *node,
struct device_node *parent)
{
- int rc;
+ struct irq_chip *chip = &riscv_intc_chip;
unsigned long hartid;
+ int rc;
rc = riscv_of_parent_hartid(node, &hartid);
if (rc < 0) {
@@ -166,10 +233,17 @@ static int __init riscv_intc_init(struct device_node *node,
return 0;
}
- return riscv_intc_init_common(of_node_to_fwnode(node));
+ if (of_device_is_compatible(node, "andestech,cpu-intc")) {
+ riscv_intc_custom_base = ANDES_SLI_CAUSE_BASE;
+ riscv_intc_custom_nr_irqs = ANDES_RV_IRQ_LAST;
+ chip = &andes_intc_chip;
+ }
+
+ return riscv_intc_init_common(of_node_to_fwnode(node), chip);
}
IRQCHIP_DECLARE(riscv, "riscv,cpu-intc", riscv_intc_init);
+IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
#ifdef CONFIG_ACPI
@@ -196,7 +270,7 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
return -ENOMEM;
}
- return riscv_intc_init_common(fn);
+ return riscv_intc_init_common(fn, &riscv_intc_chip);
}
IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 5b7bc4fd9517..601000d2a351 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -3,7 +3,6 @@
* Copyright (C) 2017 SiFive
* Copyright (C) 2018 Christoph Hellwig
*/
-#define pr_fmt(fmt) "plic: " fmt
#include <linux/cpu.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -64,6 +63,7 @@
#define PLIC_QUIRK_EDGE_INTERRUPT 0
struct plic_priv {
+ struct device *dev;
struct cpumask lmask;
struct irq_domain *irqdomain;
void __iomem *regs;
@@ -103,9 +103,11 @@ static void __plic_toggle(void __iomem *enable_base, int hwirq, int enable)
static void plic_toggle(struct plic_handler *handler, int hwirq, int enable)
{
- raw_spin_lock(&handler->enable_lock);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&handler->enable_lock, flags);
__plic_toggle(handler->enable_base, hwirq, enable);
- raw_spin_unlock(&handler->enable_lock);
+ raw_spin_unlock_irqrestore(&handler->enable_lock, flags);
}
static inline void plic_irq_toggle(const struct cpumask *mask,
@@ -236,6 +238,7 @@ static int plic_irq_set_type(struct irq_data *d, unsigned int type)
static int plic_irq_suspend(void)
{
unsigned int i, cpu;
+ unsigned long flags;
u32 __iomem *reg;
struct plic_priv *priv;
@@ -253,12 +256,12 @@ static int plic_irq_suspend(void)
if (!handler->present)
continue;
- raw_spin_lock(&handler->enable_lock);
+ raw_spin_lock_irqsave(&handler->enable_lock, flags);
for (i = 0; i < DIV_ROUND_UP(priv->nr_irqs, 32); i++) {
reg = handler->enable_base + i * sizeof(u32);
handler->enable_save[i] = readl(reg);
}
- raw_spin_unlock(&handler->enable_lock);
+ raw_spin_unlock_irqrestore(&handler->enable_lock, flags);
}
return 0;
@@ -267,6 +270,7 @@ static int plic_irq_suspend(void)
static void plic_irq_resume(void)
{
unsigned int i, index, cpu;
+ unsigned long flags;
u32 __iomem *reg;
struct plic_priv *priv;
@@ -284,12 +288,12 @@ static void plic_irq_resume(void)
if (!handler->present)
continue;
- raw_spin_lock(&handler->enable_lock);
+ raw_spin_lock_irqsave(&handler->enable_lock, flags);
for (i = 0; i < DIV_ROUND_UP(priv->nr_irqs, 32); i++) {
reg = handler->enable_base + i * sizeof(u32);
writel(handler->enable_save[i], reg);
}
- raw_spin_unlock(&handler->enable_lock);
+ raw_spin_unlock_irqrestore(&handler->enable_lock, flags);
}
}
@@ -370,9 +374,10 @@ static void plic_handle_irq(struct irq_desc *desc)
while ((hwirq = readl(claim))) {
int err = generic_handle_domain_irq(handler->priv->irqdomain,
hwirq);
- if (unlikely(err))
- pr_warn_ratelimited("can't find mapping for hwirq %lu\n",
- hwirq);
+ if (unlikely(err)) {
+ dev_warn_ratelimited(handler->priv->dev,
+ "can't find mapping for hwirq %lu\n", hwirq);
+ }
}
chained_irq_exit(chip, desc);
@@ -400,63 +405,122 @@ static int plic_starting_cpu(unsigned int cpu)
enable_percpu_irq(plic_parent_irq,
irq_get_trigger_type(plic_parent_irq));
else
- pr_warn("cpu%d: parent irq not available\n", cpu);
+ dev_warn(handler->priv->dev, "cpu%d: parent irq not available\n", cpu);
plic_set_threshold(handler, PLIC_ENABLE_THRESHOLD);
return 0;
}
-static int __init __plic_init(struct device_node *node,
- struct device_node *parent,
- unsigned long plic_quirks)
+static const struct of_device_id plic_match[] = {
+ { .compatible = "sifive,plic-1.0.0" },
+ { .compatible = "riscv,plic0" },
+ { .compatible = "andestech,nceplic100",
+ .data = (const void *)BIT(PLIC_QUIRK_EDGE_INTERRUPT) },
+ { .compatible = "thead,c900-plic",
+ .data = (const void *)BIT(PLIC_QUIRK_EDGE_INTERRUPT) },
+ {}
+};
+
+static int plic_parse_nr_irqs_and_contexts(struct platform_device *pdev,
+ u32 *nr_irqs, u32 *nr_contexts)
{
- int error = 0, nr_contexts, nr_handlers = 0, i;
- u32 nr_irqs;
- struct plic_priv *priv;
- struct plic_handler *handler;
- unsigned int cpu;
+ struct device *dev = &pdev->dev;
+ int rc;
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+ /*
+ * Currently, only OF fwnode is supported so extend this
+ * function for ACPI support.
+ */
+ if (!is_of_node(dev->fwnode))
+ return -EINVAL;
- priv->plic_quirks = plic_quirks;
+ rc = of_property_read_u32(to_of_node(dev->fwnode), "riscv,ndev", nr_irqs);
+ if (rc) {
+ dev_err(dev, "riscv,ndev property not available\n");
+ return rc;
+ }
- priv->regs = of_iomap(node, 0);
- if (WARN_ON(!priv->regs)) {
- error = -EIO;
- goto out_free_priv;
+ *nr_contexts = of_irq_count(to_of_node(dev->fwnode));
+ if (WARN_ON(!(*nr_contexts))) {
+ dev_err(dev, "no PLIC context available\n");
+ return -EINVAL;
}
- error = -EINVAL;
- of_property_read_u32(node, "riscv,ndev", &nr_irqs);
- if (WARN_ON(!nr_irqs))
- goto out_iounmap;
+ return 0;
+}
+
+static int plic_parse_context_parent(struct platform_device *pdev, u32 context,
+ u32 *parent_hwirq, int *parent_cpu)
+{
+ struct device *dev = &pdev->dev;
+ struct of_phandle_args parent;
+ unsigned long hartid;
+ int rc;
- priv->nr_irqs = nr_irqs;
+ /*
+ * Currently, only OF fwnode is supported so extend this
+ * function for ACPI support.
+ */
+ if (!is_of_node(dev->fwnode))
+ return -EINVAL;
- priv->prio_save = bitmap_alloc(nr_irqs, GFP_KERNEL);
- if (!priv->prio_save)
- goto out_free_priority_reg;
+ rc = of_irq_parse_one(to_of_node(dev->fwnode), context, &parent);
+ if (rc)
+ return rc;
- nr_contexts = of_irq_count(node);
- if (WARN_ON(!nr_contexts))
- goto out_free_priority_reg;
+ rc = riscv_of_parent_hartid(parent.np, &hartid);
+ if (rc)
+ return rc;
- error = -ENOMEM;
- priv->irqdomain = irq_domain_add_linear(node, nr_irqs + 1,
- &plic_irqdomain_ops, priv);
- if (WARN_ON(!priv->irqdomain))
- goto out_free_priority_reg;
+ *parent_hwirq = parent.args[0];
+ *parent_cpu = riscv_hartid_to_cpuid(hartid);
+ return 0;
+}
- for (i = 0; i < nr_contexts; i++) {
- struct of_phandle_args parent;
- irq_hw_number_t hwirq;
- int cpu;
- unsigned long hartid;
+static int plic_probe(struct platform_device *pdev)
+{
+ int error = 0, nr_contexts, nr_handlers = 0, cpu, i;
+ struct device *dev = &pdev->dev;
+ unsigned long plic_quirks = 0;
+ struct plic_handler *handler;
+ u32 nr_irqs, parent_hwirq;
+ struct irq_domain *domain;
+ struct plic_priv *priv;
+ irq_hw_number_t hwirq;
+ bool cpuhp_setup;
+
+ if (is_of_node(dev->fwnode)) {
+ const struct of_device_id *id;
+
+ id = of_match_node(plic_match, to_of_node(dev->fwnode));
+ if (id)
+ plic_quirks = (unsigned long)id->data;
+ }
+
+ error = plic_parse_nr_irqs_and_contexts(pdev, &nr_irqs, &nr_contexts);
+ if (error)
+ return error;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ priv->plic_quirks = plic_quirks;
+ priv->nr_irqs = nr_irqs;
+
+ priv->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (WARN_ON(!priv->regs))
+ return -EIO;
- if (of_irq_parse_one(node, i, &parent)) {
- pr_err("failed to parse parent for context %d.\n", i);
+ priv->prio_save = devm_bitmap_zalloc(dev, nr_irqs, GFP_KERNEL);
+ if (!priv->prio_save)
+ return -ENOMEM;
+
+ for (i = 0; i < nr_contexts; i++) {
+ error = plic_parse_context_parent(pdev, i, &parent_hwirq, &cpu);
+ if (error) {
+ dev_warn(dev, "hwirq for context%d not found\n", i);
continue;
}
@@ -464,7 +528,7 @@ static int __init __plic_init(struct device_node *node,
* Skip contexts other than external interrupts for our
* privilege level.
*/
- if (parent.args[0] != RV_IRQ_EXT) {
+ if (parent_hwirq != RV_IRQ_EXT) {
/* Disable S-mode enable bits if running in M-mode. */
if (IS_ENABLED(CONFIG_RISCV_M_MODE)) {
void __iomem *enable_base = priv->regs +
@@ -477,24 +541,17 @@ static int __init __plic_init(struct device_node *node,
continue;
}
- error = riscv_of_parent_hartid(parent.np, &hartid);
- if (error < 0) {
- pr_warn("failed to parse hart ID for context %d.\n", i);
- continue;
- }
-
- cpu = riscv_hartid_to_cpuid(hartid);
if (cpu < 0) {
- pr_warn("Invalid cpuid for context %d\n", i);
+ dev_warn(dev, "Invalid cpuid for context %d\n", i);
continue;
}
/* Find parent domain and register chained handler */
- if (!plic_parent_irq && irq_find_host(parent.np)) {
- plic_parent_irq = irq_of_parse_and_map(node, i);
+ domain = irq_find_matching_fwnode(riscv_get_intc_hwnode(), DOMAIN_BUS_ANY);
+ if (!plic_parent_irq && domain) {
+ plic_parent_irq = irq_create_mapping(domain, RV_IRQ_EXT);
if (plic_parent_irq)
- irq_set_chained_handler(plic_parent_irq,
- plic_handle_irq);
+ irq_set_chained_handler(plic_parent_irq, plic_handle_irq);
}
/*
@@ -504,7 +561,7 @@ static int __init __plic_init(struct device_node *node,
*/
handler = per_cpu_ptr(&plic_handlers, cpu);
if (handler->present) {
- pr_warn("handler already present for context %d.\n", i);
+ dev_warn(dev, "handler already present for context %d.\n", i);
plic_set_threshold(handler, PLIC_DISABLE_THRESHOLD);
goto done;
}
@@ -518,10 +575,10 @@ static int __init __plic_init(struct device_node *node,
i * CONTEXT_ENABLE_SIZE;
handler->priv = priv;
- handler->enable_save = kcalloc(DIV_ROUND_UP(nr_irqs, 32),
- sizeof(*handler->enable_save), GFP_KERNEL);
+ handler->enable_save = devm_kcalloc(dev, DIV_ROUND_UP(nr_irqs, 32),
+ sizeof(*handler->enable_save), GFP_KERNEL);
if (!handler->enable_save)
- goto out_free_enable_reg;
+ goto fail_cleanup_contexts;
done:
for (hwirq = 1; hwirq <= nr_irqs; hwirq++) {
plic_toggle(handler, hwirq, 0);
@@ -531,52 +588,60 @@ static int __init __plic_init(struct device_node *node,
nr_handlers++;
}
+ priv->irqdomain = irq_domain_add_linear(to_of_node(dev->fwnode), nr_irqs + 1,
+ &plic_irqdomain_ops, priv);
+ if (WARN_ON(!priv->irqdomain))
+ goto fail_cleanup_contexts;
+
/*
* We can have multiple PLIC instances so setup cpuhp state
- * and register syscore operations only when context handler
- * for current/boot CPU is present.
+ * and register syscore operations only once after context
+ * handlers of all online CPUs are initialized.
*/
- handler = this_cpu_ptr(&plic_handlers);
- if (handler->present && !plic_cpuhp_setup_done) {
- cpuhp_setup_state(CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
- "irqchip/sifive/plic:starting",
- plic_starting_cpu, plic_dying_cpu);
- register_syscore_ops(&plic_irq_syscore_ops);
- plic_cpuhp_setup_done = true;
+ if (!plic_cpuhp_setup_done) {
+ cpuhp_setup = true;
+ for_each_online_cpu(cpu) {
+ handler = per_cpu_ptr(&plic_handlers, cpu);
+ if (!handler->present) {
+ cpuhp_setup = false;
+ break;
+ }
+ }
+ if (cpuhp_setup) {
+ cpuhp_setup_state(CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
+ "irqchip/sifive/plic:starting",
+ plic_starting_cpu, plic_dying_cpu);
+ register_syscore_ops(&plic_irq_syscore_ops);
+ plic_cpuhp_setup_done = true;
+ }
}
- pr_info("%pOFP: mapped %d interrupts with %d handlers for"
- " %d contexts.\n", node, nr_irqs, nr_handlers, nr_contexts);
+ dev_info(dev, "mapped %d interrupts with %d handlers for %d contexts.\n",
+ nr_irqs, nr_handlers, nr_contexts);
return 0;
-out_free_enable_reg:
- for_each_cpu(cpu, cpu_present_mask) {
+fail_cleanup_contexts:
+ for (i = 0; i < nr_contexts; i++) {
+ if (plic_parse_context_parent(pdev, i, &parent_hwirq, &cpu))
+ continue;
+ if (parent_hwirq != RV_IRQ_EXT || cpu < 0)
+ continue;
+
handler = per_cpu_ptr(&plic_handlers, cpu);
- kfree(handler->enable_save);
+ handler->present = false;
+ handler->hart_base = NULL;
+ handler->enable_base = NULL;
+ handler->enable_save = NULL;
+ handler->priv = NULL;
}
-out_free_priority_reg:
- kfree(priv->prio_save);
-out_iounmap:
- iounmap(priv->regs);
-out_free_priv:
- kfree(priv);
- return error;
+ return -ENOMEM;
}
-static int __init plic_init(struct device_node *node,
- struct device_node *parent)
-{
- return __plic_init(node, parent, 0);
-}
-
-IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init);
-IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */
-
-static int __init plic_edge_init(struct device_node *node,
- struct device_node *parent)
-{
- return __plic_init(node, parent, BIT(PLIC_QUIRK_EDGE_INTERRUPT));
-}
-
-IRQCHIP_DECLARE(andestech_nceplic100, "andestech,nceplic100", plic_edge_init);
-IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_edge_init);
+static struct platform_driver plic_driver = {
+ .driver = {
+ .name = "riscv-plic",
+ .of_match_table = plic_match,
+ },
+ .probe = plic_probe,
+};
+builtin_platform_driver(plic_driver);
diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c
index e3e28a4f7d01..b1abc2a0c971 100644
--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -1587,8 +1587,8 @@ static int flexrm_mbox_probe(struct platform_device *pdev)
}
/* Allocate platform MSIs for each ring */
- ret = platform_msi_domain_alloc_irqs(dev, mbox->num_rings,
- flexrm_mbox_msi_write);
+ ret = platform_device_msi_init_and_alloc_irqs(dev, mbox->num_rings,
+ flexrm_mbox_msi_write);
if (ret)
goto fail_destroy_cmpl_pool;
@@ -1641,7 +1641,7 @@ static int flexrm_mbox_probe(struct platform_device *pdev)
fail_free_debugfs_root:
debugfs_remove_recursive(mbox->root);
- platform_msi_domain_free_irqs(dev);
+ platform_device_msi_free_irqs_all(dev);
fail_destroy_cmpl_pool:
dma_pool_destroy(mbox->cmpl_pool);
fail_destroy_bd_pool:
@@ -1657,7 +1657,7 @@ static void flexrm_mbox_remove(struct platform_device *pdev)
debugfs_remove_recursive(mbox->root);
- platform_msi_domain_free_irqs(dev);
+ platform_device_msi_free_irqs_all(dev);
dma_pool_destroy(mbox->cmpl_pool);
dma_pool_destroy(mbox->bd_pool);
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 6303b82566f9..9e5d7fa647b6 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -716,7 +716,7 @@ static void smmu_pmu_free_msis(void *data)
{
struct device *dev = data;
- platform_msi_domain_free_irqs(dev);
+ platform_device_msi_free_irqs_all(dev);
}
static void smmu_pmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
@@ -746,7 +746,7 @@ static void smmu_pmu_setup_msi(struct smmu_pmu *pmu)
if (!(readl(pmu->reg_base + SMMU_PMCG_CFGR) & SMMU_PMCG_CFGR_MSI))
return;
- ret = platform_msi_domain_alloc_irqs(dev, 1, smmu_pmu_write_msi_msg);
+ ret = platform_device_msi_init_and_alloc_irqs(dev, 1, smmu_pmu_write_msi_msg);
if (ret) {
dev_warn(dev, "failed to allocate MSIs\n");
return;
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 39eef470f8fa..8fde5204e88b 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1712,8 +1712,8 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
* 2. Poll queues do not need ESI.
*/
nr_irqs = hba->nr_hw_queues - hba->nr_queues[HCTX_TYPE_POLL];
- ret = platform_msi_domain_alloc_irqs(hba->dev, nr_irqs,
- ufs_qcom_write_msi_msg);
+ ret = platform_device_msi_init_and_alloc_irqs(hba->dev, nr_irqs,
+ ufs_qcom_write_msi_msg);
if (ret) {
dev_err(hba->dev, "Failed to request Platform MSI %d\n", ret);
return ret;
@@ -1742,7 +1742,7 @@ static int ufs_qcom_config_esi(struct ufs_hba *hba)
devm_free_irq(hba->dev, desc->irq, hba);
}
msi_unlock_descs(hba->dev);
- platform_msi_domain_free_irqs(hba->dev);
+ platform_device_msi_free_irqs_all(hba->dev);
} else {
if (host->hw_ver.major == 6 && host->hw_ver.minor == 0 &&
host->hw_ver.step == 0)
@@ -1818,7 +1818,7 @@ static void ufs_qcom_remove(struct platform_device *pdev)
pm_runtime_get_sync(&(pdev)->dev);
ufshcd_remove(hba);
- platform_msi_domain_free_irqs(hba->dev);
+ platform_device_msi_free_irqs_all(hba->dev);
}
static const struct of_device_id ufs_qcom_of_match[] __maybe_unused = {
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index ee0a82c60508..21ecf582a0fe 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -619,6 +619,23 @@ static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
+#ifdef CONFIG_GENERIC_MSI_IRQ
+int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq,
+ unsigned int type);
+void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq);
+#else
+static inline int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq,
+ unsigned int type)
+{
+ WARN_ON_ONCE(1);
+ return -EINVAL;
+}
+static inline void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq)
+{
+ WARN_ON_ONCE(1);
+}
+#endif
+
#else /* CONFIG_IRQ_DOMAIN */
static inline void irq_dispose_mapping(unsigned int virq) { }
static inline struct irq_domain *irq_find_matching_fwnode(
diff --git a/include/linux/irqdomain_defs.h b/include/linux/irqdomain_defs.h
index c29921fd8cd1..5c1fe6f1fcde 100644
--- a/include/linux/irqdomain_defs.h
+++ b/include/linux/irqdomain_defs.h
@@ -26,6 +26,8 @@ enum irq_domain_bus_token {
DOMAIN_BUS_DMAR,
DOMAIN_BUS_AMDVI,
DOMAIN_BUS_PCI_DEVICE_IMS,
+ DOMAIN_BUS_DEVICE_MSI,
+ DOMAIN_BUS_WIRED_TO_MSI,
};
#endif /* _LINUX_IRQDOMAIN_DEFS_H */
diff --git a/include/linux/msi.h b/include/linux/msi.h
index ddace8c34dcf..26d07e23052e 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -412,6 +412,7 @@ bool arch_restore_msi_irqs(struct pci_dev *dev);
struct irq_domain;
struct irq_domain_ops;
struct irq_chip;
+struct irq_fwspec;
struct device_node;
struct fwnode_handle;
struct msi_domain_info;
@@ -431,6 +432,8 @@ struct msi_domain_info;
* function.
* @msi_post_free: Optional function which is invoked after freeing
* all interrupts.
+ * @msi_translate: Optional translate callback to support the odd wire to
+ * MSI bridges, e.g. MBIGEN
*
* @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying
* irqdomain.
@@ -468,6 +471,8 @@ struct msi_domain_ops {
struct device *dev);
void (*msi_post_free)(struct irq_domain *domain,
struct device *dev);
+ int (*msi_translate)(struct irq_domain *domain, struct irq_fwspec *fwspec,
+ irq_hw_number_t *hwirq, unsigned int *type);
};
/**
@@ -547,6 +552,10 @@ enum {
MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS = (1 << 5),
/* Free MSI descriptors */
MSI_FLAG_FREE_MSI_DESCS = (1 << 6),
+ /* Use dev->fwnode for MSI device domain creation */
+ MSI_FLAG_USE_DEV_FWNODE = (1 << 7),
+ /* Set parent->dev into domain->pm_dev on device domain creation */
+ MSI_FLAG_PARENT_PM_DEV = (1 << 8),
/* Mask for the generic functionality */
MSI_GENERIC_FLAGS_MASK = GENMASK(15, 0),
@@ -572,6 +581,11 @@ enum {
* struct msi_parent_ops - MSI parent domain callbacks and configuration info
*
* @supported_flags: Required: The supported MSI flags of the parent domain
+ * @required_flags: Optional: The required MSI flags of the parent MSI domain
+ * @bus_select_token: Optional: The bus token of the real parent domain for
+ * irq_domain::select()
+ * @bus_select_mask: Optional: A mask of supported BUS_DOMAINs for
+ * irq_domain::select()
* @prefix: Optional: Prefix for the domain and chip name
* @init_dev_msi_info: Required: Callback for MSI parent domains to setup parent
* domain specific domain flags, domain ops and interrupt chip
@@ -579,6 +593,9 @@ enum {
*/
struct msi_parent_ops {
u32 supported_flags;
+ u32 required_flags;
+ u32 bus_select_token;
+ u32 bus_select_mask;
const char *prefix;
bool (*init_dev_msi_info)(struct device *dev, struct irq_domain *domain,
struct irq_domain *msi_parent_domain,
@@ -627,9 +644,6 @@ struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain);
struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
struct msi_domain_info *info,
struct irq_domain *parent);
-int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
- irq_write_msi_msg_t write_msi_msg);
-void platform_msi_domain_free_irqs(struct device *dev);
/* When an MSI domain is used as an intermediate domain */
int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev,
@@ -656,6 +670,10 @@ int platform_msi_device_domain_alloc(struct irq_domain *domain, unsigned int vir
void platform_msi_device_domain_free(struct irq_domain *domain, unsigned int virq,
unsigned int nvec);
void *platform_msi_get_host_data(struct irq_domain *domain);
+/* Per device platform MSI */
+int platform_device_msi_init_and_alloc_irqs(struct device *dev, unsigned int nvec,
+ irq_write_msi_msg_t write_msi_msg);
+void platform_device_msi_free_irqs_all(struct device *dev);
bool msi_device_has_isolated_msi(struct device *dev);
#else /* CONFIG_GENERIC_MSI_IRQ */
diff --git a/include/linux/soc/andes/irq.h b/include/linux/soc/andes/irq.h
new file mode 100644
index 000000000000..edc3182d6e66
--- /dev/null
+++ b/include/linux/soc/andes/irq.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2023 Andes Technology Corporation
+ */
+#ifndef __ANDES_IRQ_H
+#define __ANDES_IRQ_H
+
+/* Andes PMU irq number */
+#define ANDES_RV_IRQ_PMOVI 18
+#define ANDES_RV_IRQ_LAST ANDES_RV_IRQ_PMOVI
+#define ANDES_SLI_CAUSE_BASE 256
+
+/* Andes PMU related registers */
+#define ANDES_CSR_SLIE 0x9c4
+#define ANDES_CSR_SLIP 0x9c5
+#define ANDES_CSR_SCOUNTEROF 0x9d4
+
+#endif /* __ANDES_IRQ_H */
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 0bdef4fe925b..3dd1c871e091 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -29,6 +29,7 @@ static int irq_domain_alloc_irqs_locked(struct irq_domain *domain, int irq_base,
unsigned int nr_irqs, int node, void *arg,
bool realloc, const struct irq_affinity_desc *affinity);
static void irq_domain_check_hierarchy(struct irq_domain *domain);
+static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq);
struct irqchip_fwid {
struct fwnode_handle fwnode;
@@ -448,7 +449,7 @@ struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
*/
mutex_lock(&irq_domain_mutex);
list_for_each_entry(h, &irq_domain_list, link) {
- if (h->ops->select && fwspec->param_count)
+ if (h->ops->select && bus_token != DOMAIN_BUS_ANY)
rc = h->ops->select(h, fwspec, bus_token);
else if (h->ops->match)
rc = h->ops->match(h, to_of_node(fwnode), bus_token);
@@ -858,8 +859,13 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
}
if (irq_domain_is_hierarchy(domain)) {
- virq = irq_domain_alloc_irqs_locked(domain, -1, 1, NUMA_NO_NODE,
- fwspec, false, NULL);
+ if (irq_domain_is_msi_device(domain)) {
+ mutex_unlock(&domain->root->mutex);
+ virq = msi_device_domain_alloc_wired(domain, hwirq, type);
+ mutex_lock(&domain->root->mutex);
+ } else
+ virq = irq_domain_alloc_irqs_locked(domain, -1, 1, NUMA_NO_NODE,
+ fwspec, false, NULL);
if (virq <= 0) {
virq = 0;
goto out;
@@ -914,7 +920,7 @@ void irq_dispose_mapping(unsigned int virq)
return;
if (irq_domain_is_hierarchy(domain)) {
- irq_domain_free_irqs(virq, 1);
+ irq_domain_free_one_irq(domain, virq);
} else {
irq_domain_disassociate(domain, virq);
irq_free_desc(virq);
@@ -1755,6 +1761,14 @@ void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs)
irq_free_descs(virq, nr_irqs);
}
+static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq)
+{
+ if (irq_domain_is_msi_device(domain))
+ msi_device_domain_free_wired(domain, virq);
+ else
+ irq_domain_free_irqs(virq, 1);
+}
+
/**
* irq_domain_alloc_irqs_parent - Allocate interrupts from parent domain
* @domain: Domain below which interrupts must be allocated
@@ -1907,9 +1921,9 @@ static int irq_domain_alloc_irqs_locked(struct irq_domain *domain, int irq_base,
return -EINVAL;
}
-static void irq_domain_check_hierarchy(struct irq_domain *domain)
-{
-}
+static void irq_domain_check_hierarchy(struct irq_domain *domain) { }
+static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq) { }
+
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 75d0ae490e29..8f222d1cccec 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -8,8 +8,6 @@
#include <linux/cpu.h>
#include <linux/irq.h>
-#define IRQ_MATRIX_SIZE (BITS_TO_LONGS(IRQ_MATRIX_BITS))
-
struct cpumap {
unsigned int available;
unsigned int allocated;
@@ -17,8 +15,8 @@ struct cpumap {
unsigned int managed_allocated;
bool initialized;
bool online;
- unsigned long alloc_map[IRQ_MATRIX_SIZE];
- unsigned long managed_map[IRQ_MATRIX_SIZE];
+ unsigned long *managed_map;
+ unsigned long alloc_map[];
};
struct irq_matrix {
@@ -32,8 +30,8 @@ struct irq_matrix {
unsigned int total_allocated;
unsigned int online_maps;
struct cpumap __percpu *maps;
- unsigned long scratch_map[IRQ_MATRIX_SIZE];
- unsigned long system_map[IRQ_MATRIX_SIZE];
+ unsigned long *system_map;
+ unsigned long scratch_map[];
};
#define CREATE_TRACE_POINTS
@@ -50,24 +48,32 @@ __init struct irq_matrix *irq_alloc_matrix(unsigned int matrix_bits,
unsigned int alloc_start,
unsigned int alloc_end)
{
+ unsigned int cpu, matrix_size = BITS_TO_LONGS(matrix_bits);
struct irq_matrix *m;
- if (matrix_bits > IRQ_MATRIX_BITS)
- return NULL;
-
- m = kzalloc(sizeof(*m), GFP_KERNEL);
+ m = kzalloc(struct_size(m, scratch_map, matrix_size * 2), GFP_KERNEL);
if (!m)
return NULL;
+ m->system_map = &m->scratch_map[matrix_size];
+
m->matrix_bits = matrix_bits;
m->alloc_start = alloc_start;
m->alloc_end = alloc_end;
m->alloc_size = alloc_end - alloc_start;
- m->maps = alloc_percpu(*m->maps);
+ m->maps = __alloc_percpu(struct_size(m->maps, alloc_map, matrix_size * 2),
+ __alignof__(*m->maps));
if (!m->maps) {
kfree(m);
return NULL;
}
+
+ for_each_possible_cpu(cpu) {
+ struct cpumap *cm = per_cpu_ptr(m->maps, cpu);
+
+ cm->managed_map = &cm->alloc_map[matrix_size];
+ }
+
return m;
}
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 79b4a58ba9c3..f90952ebc494 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -726,11 +726,26 @@ static void msi_domain_free(struct irq_domain *domain, unsigned int virq,
irq_domain_free_irqs_top(domain, virq, nr_irqs);
}
+static int msi_domain_translate(struct irq_domain *domain, struct irq_fwspec *fwspec,
+ irq_hw_number_t *hwirq, unsigned int *type)
+{
+ struct msi_domain_info *info = domain->host_data;
+
+ /*
+ * This will catch allocations through the regular irqdomain path except
+ * for MSI domains which really support this, e.g. MBIGEN.
+ */
+ if (!info->ops->msi_translate)
+ return -ENOTSUPP;
+ return info->ops->msi_translate(domain, fwspec, hwirq, type);
+}
+
static const struct irq_domain_ops msi_domain_ops = {
.alloc = msi_domain_alloc,
.free = msi_domain_free,
.activate = msi_domain_activate,
.deactivate = msi_domain_deactivate,
+ .translate = msi_domain_translate,
};
static irq_hw_number_t msi_domain_ops_get_hwirq(struct msi_domain_info *info,
@@ -830,8 +845,11 @@ static struct irq_domain *__msi_create_irq_domain(struct fwnode_handle *fwnode,
domain = irq_domain_create_hierarchy(parent, flags | IRQ_DOMAIN_FLAG_MSI, 0,
fwnode, &msi_domain_ops, info);
- if (domain)
+ if (domain) {
irq_domain_update_bus_token(domain, info->bus_token);
+ if (info->flags & MSI_FLAG_PARENT_PM_DEV)
+ domain->pm_dev = parent->pm_dev;
+ }
return domain;
}
@@ -945,9 +963,9 @@ bool msi_create_device_irq_domain(struct device *dev, unsigned int domid,
void *chip_data)
{
struct irq_domain *domain, *parent = dev->msi.domain;
- const struct msi_parent_ops *pops;
+ struct fwnode_handle *fwnode, *fwnalloced = NULL;
struct msi_domain_template *bundle;
- struct fwnode_handle *fwnode;
+ const struct msi_parent_ops *pops;
if (!irq_domain_is_msi_parent(parent))
return false;
@@ -970,7 +988,19 @@ bool msi_create_device_irq_domain(struct device *dev, unsigned int domid,
pops->prefix ? : "", bundle->chip.name, dev_name(dev));
bundle->chip.name = bundle->name;
- fwnode = irq_domain_alloc_named_fwnode(bundle->name);
+ /*
+ * Using the device firmware node is required for wire to MSI
+ * device domains so that the existing firmware results in a domain
+ * match.
+ * All other device domains like PCI/MSI use the named firmware
+ * node as they are not guaranteed to have a fwnode. They are never
+ * looked up and always handled in the context of the device.
+ */
+ if (bundle->info.flags & MSI_FLAG_USE_DEV_FWNODE)
+ fwnode = dev->fwnode;
+ else
+ fwnode = fwnalloced = irq_domain_alloc_named_fwnode(bundle->name);
+
if (!fwnode)
goto free_bundle;
@@ -997,7 +1027,7 @@ bool msi_create_device_irq_domain(struct device *dev, unsigned int domid,
fail:
msi_unlock_descs(dev);
free_fwnode:
- irq_domain_free_fwnode(fwnode);
+ irq_domain_free_fwnode(fwnalloced);
free_bundle:
kfree(bundle);
return false;
@@ -1431,34 +1461,10 @@ int msi_domain_alloc_irqs_all_locked(struct device *dev, unsigned int domid, int
return msi_domain_alloc_locked(dev, &ctrl);
}
-/**
- * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at
- * a given index - or at the next free index
- *
- * @dev: Pointer to device struct of the device for which the interrupts
- * are allocated
- * @domid: Id of the interrupt domain to operate on
- * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation
- * uses the next free index.
- * @affdesc: Optional pointer to an interrupt affinity descriptor structure
- * @icookie: Optional pointer to a domain specific per instance cookie. If
- * non-NULL the content of the cookie is stored in msi_desc::data.
- * Must be NULL for MSI-X allocations
- *
- * This requires a MSI interrupt domain which lets the core code manage the
- * MSI descriptors.
- *
- * Return: struct msi_map
- *
- * On success msi_map::index contains the allocated index number and
- * msi_map::virq the corresponding Linux interrupt number
- *
- * On failure msi_map::index contains the error code and msi_map::virq
- * is %0.
- */
-struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index,
- const struct irq_affinity_desc *affdesc,
- union msi_instance_cookie *icookie)
+static struct msi_map __msi_domain_alloc_irq_at(struct device *dev, unsigned int domid,
+ unsigned int index,
+ const struct irq_affinity_desc *affdesc,
+ union msi_instance_cookie *icookie)
{
struct msi_ctrl ctrl = { .domid = domid, .nirqs = 1, };
struct irq_domain *domain;
@@ -1466,17 +1472,16 @@ struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, u
struct msi_desc *desc;
int ret;
- msi_lock_descs(dev);
domain = msi_get_device_domain(dev, domid);
if (!domain) {
map.index = -ENODEV;
- goto unlock;
+ return map;
}
desc = msi_alloc_desc(dev, 1, affdesc);
if (!desc) {
map.index = -ENOMEM;
- goto unlock;
+ return map;
}
if (icookie)
@@ -1485,7 +1490,7 @@ struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, u
ret = msi_insert_desc(dev, desc, domid, index);
if (ret) {
map.index = ret;
- goto unlock;
+ return map;
}
ctrl.first = ctrl.last = desc->msi_index;
@@ -1498,11 +1503,90 @@ struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, u
map.index = desc->msi_index;
map.virq = desc->irq;
}
-unlock:
+ return map;
+}
+
+/**
+ * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at
+ * a given index - or at the next free index
+ *
+ * @dev: Pointer to device struct of the device for which the interrupts
+ * are allocated
+ * @domid: Id of the interrupt domain to operate on
+ * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation
+ * uses the next free index.
+ * @affdesc: Optional pointer to an interrupt affinity descriptor structure
+ * @icookie: Optional pointer to a domain specific per instance cookie. If
+ * non-NULL the content of the cookie is stored in msi_desc::data.
+ * Must be NULL for MSI-X allocations
+ *
+ * This requires a MSI interrupt domain which lets the core code manage the
+ * MSI descriptors.
+ *
+ * Return: struct msi_map
+ *
+ * On success msi_map::index contains the allocated index number and
+ * msi_map::virq the corresponding Linux interrupt number
+ *
+ * On failure msi_map::index contains the error code and msi_map::virq
+ * is %0.
+ */
+struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index,
+ const struct irq_affinity_desc *affdesc,
+ union msi_instance_cookie *icookie)
+{
+ struct msi_map map;
+
+ msi_lock_descs(dev);
+ map = __msi_domain_alloc_irq_at(dev, domid, index, affdesc, icookie);
msi_unlock_descs(dev);
return map;
}
+/**
+ * msi_device_domain_alloc_wired - Allocate a "wired" interrupt on @domain
+ * @domain: The domain to allocate on
+ * @hwirq: The hardware interrupt number to allocate for
+ * @type: The interrupt type
+ *
+ * This weirdness supports wire to MSI controllers like MBIGEN.
+ *
+ * @hwirq is the hardware interrupt number which is handed in from
+ * irq_create_fwspec_mapping(). As the wire to MSI domain is sparse, but
+ * sized in firmware, the hardware interrupt number cannot be used as MSI
+ * index. For the underlying irq chip the MSI index is irrelevant and
+ * all it needs is the hardware interrupt number.
+ *
+ * To handle this the MSI index is allocated with MSI_ANY_INDEX and the
+ * hardware interrupt number is stored along with the type information in
+ * msi_desc::cookie so the underlying interrupt chip and domain code can
+ * retrieve it.
+ *
+ * Return: The Linux interrupt number (> 0) or an error code
+ */
+int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq,
+ unsigned int type)
+{
+ unsigned int domid = MSI_DEFAULT_DOMAIN;
+ union msi_instance_cookie icookie = { };
+ struct device *dev = domain->dev;
+ struct msi_map map = { };
+
+ if (WARN_ON_ONCE(!dev || domain->bus_token != DOMAIN_BUS_WIRED_TO_MSI))
+ return -EINVAL;
+
+ icookie.value = ((u64)type << 32) | hwirq;
+
+ msi_lock_descs(dev);
+ if (WARN_ON_ONCE(msi_get_device_domain(dev, domid) != domain))
+ map.index = -EINVAL;
+ else
+ map = __msi_domain_alloc_irq_at(dev, domid, MSI_ANY_INDEX, NULL, &icookie);
+ msi_unlock_descs(dev);
+
+ return map.index >= 0 ? map.virq : map.index;
+}
+
static void __msi_domain_free_irqs(struct device *dev, struct irq_domain *domain,
struct msi_ctrl *ctrl)
{
@@ -1628,6 +1712,30 @@ void msi_domain_free_irqs_all(struct device *dev, unsigned int domid)
msi_unlock_descs(dev);
}
+/**
+ * msi_device_domain_free_wired - Free a wired interrupt in @domain
+ * @domain: The domain to free the interrupt on
+ * @virq: The Linux interrupt number to free
+ *
+ * This is the counterpart of msi_device_domain_alloc_wired() for the
+ * weird wired to MSI converting domains.
+ */
+void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq)
+{
+ struct msi_desc *desc = irq_get_msi_desc(virq);
+ struct device *dev = domain->dev;
+
+ if (WARN_ON_ONCE(!dev || !desc || domain->bus_token != DOMAIN_BUS_WIRED_TO_MSI))
+ return;
+
+ msi_lock_descs(dev);
+ if (!WARN_ON_ONCE(msi_get_device_domain(dev, MSI_DEFAULT_DOMAIN) != domain)) {
+ msi_domain_free_irqs_range_locked(dev, MSI_DEFAULT_DOMAIN, desc->msi_index,
+ desc->msi_index);
+ }
+ msi_unlock_descs(dev);
+}
+
/**
* msi_get_domain_info - Get the MSI interrupt domain info for @domain
* @domain: The interrupt domain to retrieve data from
The pull request you sent on Mon, 11 Mar 2024 00:38:52 +0100 (CET):
> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-msi-2024-03-10
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/4527e837801e76bbb196bb3b19375d8e43d636be
Thank you!
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