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Date: Thu, 10 Mar 2022 04:21:22 +0900
From: Hector Martin <marcan@...can.st>
To: Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <maz@...nel.org>, Rob Herring <robh+dt@...nel.org>
Cc: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
Mark Kettenis <mark.kettenis@...all.nl>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org
Subject: [PATCH v3 6/7] irqchip/apple-aic: Support multiple dies
Multi-die support in AICv2 uses several sets of IRQ registers. Introduce
a die count and compute the register group offset based on the die ID
field of the hwirq number, as reported by the hardware.
Signed-off-by: Hector Martin <marcan@...can.st>
---
drivers/irqchip/irq-apple-aic.c | 77 +++++++++++++++++++++++----------
1 file changed, 54 insertions(+), 23 deletions(-)
diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 4b1ba732f476..93c622435ba2 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -74,7 +74,8 @@
#define AIC_WHOAMI 0x2000
#define AIC_EVENT 0x2004
-#define AIC_EVENT_TYPE GENMASK(31, 16)
+#define AIC_EVENT_DIE GENMASK(31, 24)
+#define AIC_EVENT_TYPE GENMASK(23, 16)
#define AIC_EVENT_NUM GENMASK(15, 0)
#define AIC_EVENT_TYPE_FIQ 0 /* Software use */
@@ -159,11 +160,13 @@
#define MPIDR_CPU(x) MPIDR_AFFINITY_LEVEL(x, 0)
#define MPIDR_CLUSTER(x) MPIDR_AFFINITY_LEVEL(x, 1)
-#define AIC_IRQ_HWIRQ(x) (FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_IRQ) | \
- FIELD_PREP(AIC_EVENT_NUM, x))
+#define AIC_IRQ_HWIRQ(die, irq) (FIELD_PREP(AIC_EVENT_DIE, die) | \
+ FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_IRQ) | \
+ FIELD_PREP(AIC_EVENT_NUM, irq))
#define AIC_FIQ_HWIRQ(x) (FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_FIQ) | \
FIELD_PREP(AIC_EVENT_NUM, x))
#define AIC_HWIRQ_IRQ(x) FIELD_GET(AIC_EVENT_NUM, x)
+#define AIC_HWIRQ_DIE(x) FIELD_GET(AIC_EVENT_DIE, x)
#define AIC_NR_FIQ 4
#define AIC_NR_SWIPI 32
@@ -195,6 +198,8 @@ struct aic_info {
u32 mask_set;
u32 mask_clr;
+ u32 die_stride;
+
/* Features */
bool fast_ipi;
};
@@ -234,6 +239,8 @@ struct aic_irq_chip {
int nr_irq;
int max_irq;
+ int nr_die;
+ int max_die;
struct aic_info info;
};
@@ -266,9 +273,10 @@ static void aic_irq_mask(struct irq_data *d)
irq_hw_number_t hwirq = irqd_to_hwirq(d);
struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
+ u32 off = AIC_HWIRQ_DIE(hwirq) * ic->info.die_stride;
u32 irq = AIC_HWIRQ_IRQ(hwirq);
- aic_ic_write(ic, ic->info.mask_set + MASK_REG(irq), MASK_BIT(irq));
+ aic_ic_write(ic, ic->info.mask_set + off + MASK_REG(irq), MASK_BIT(irq));
}
static void aic_irq_unmask(struct irq_data *d)
@@ -276,9 +284,10 @@ static void aic_irq_unmask(struct irq_data *d)
irq_hw_number_t hwirq = irqd_to_hwirq(d);
struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
+ u32 off = AIC_HWIRQ_DIE(hwirq) * ic->info.die_stride;
u32 irq = AIC_HWIRQ_IRQ(hwirq);
- aic_ic_write(ic, ic->info.mask_clr + MASK_REG(irq), MASK_BIT(irq));
+ aic_ic_write(ic, ic->info.mask_clr + off + MASK_REG(irq), MASK_BIT(irq));
}
static void aic_irq_eoi(struct irq_data *d)
@@ -541,27 +550,41 @@ static int aic_irq_domain_translate(struct irq_domain *id,
unsigned int *type)
{
struct aic_irq_chip *ic = id->host_data;
+ u32 *args;
+ u32 die = 0;
- if (fwspec->param_count != 3 || !is_of_node(fwspec->fwnode))
+ if (fwspec->param_count < 3 || fwspec->param_count > 4 ||
+ !is_of_node(fwspec->fwnode))
return -EINVAL;
+ args = &fwspec->param[1];
+
+ if (fwspec->param_count == 4) {
+ die = args[0];
+ args++;
+ }
+
switch (fwspec->param[0]) {
case AIC_IRQ:
- if (fwspec->param[1] >= ic->nr_irq)
+ if (die >= ic->nr_die)
return -EINVAL;
- *hwirq = AIC_IRQ_HWIRQ(fwspec->param[1]);
+ if (args[0] >= ic->nr_irq)
+ return -EINVAL;
+ *hwirq = AIC_IRQ_HWIRQ(die, args[0]);
break;
case AIC_FIQ:
- if (fwspec->param[1] >= AIC_NR_FIQ)
+ if (die != 0)
+ return -EINVAL;
+ if (args[0] >= AIC_NR_FIQ)
return -EINVAL;
- *hwirq = AIC_FIQ_HWIRQ(fwspec->param[1]);
+ *hwirq = AIC_FIQ_HWIRQ(args[0]);
/*
* In EL1 the non-redirected registers are the guest's,
* not EL2's, so remap the hwirqs to match.
*/
if (!is_kernel_in_hyp_mode()) {
- switch (fwspec->param[1]) {
+ switch (args[0]) {
case AIC_TMR_GUEST_PHYS:
*hwirq = AIC_FIQ_HWIRQ(AIC_TMR_EL0_PHYS);
break;
@@ -580,7 +603,7 @@ static int aic_irq_domain_translate(struct irq_domain *id,
return -EINVAL;
}
- *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK;
+ *type = args[1] & IRQ_TYPE_SENSE_MASK;
return 0;
}
@@ -899,8 +922,8 @@ static struct gic_kvm_info vgic_info __initdata = {
static int __init aic_of_ic_init(struct device_node *node, struct device_node *parent)
{
- int i;
- u32 off;
+ int i, die;
+ u32 off, start_off;
void __iomem *regs;
struct aic_irq_chip *irqc;
const struct of_device_id *match;
@@ -930,8 +953,9 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
info = aic_ic_read(irqc, AIC_INFO);
irqc->nr_irq = FIELD_GET(AIC_INFO_NR_IRQ, info);
irqc->max_irq = AIC_MAX_IRQ;
+ irqc->nr_die = irqc->max_die = 1;
- off = irqc->info.target_cpu;
+ off = start_off = irqc->info.target_cpu;
off += sizeof(u32) * irqc->max_irq; /* TARGET_CPU */
break;
@@ -953,6 +977,8 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
else
static_branch_disable(&use_fast_ipi);
+ irqc->info.die_stride = off - start_off;
+
irqc->hw_domain = irq_domain_create_tree(of_node_to_fwnode(node),
&aic_irq_domain_ops, irqc);
if (WARN_ON(!irqc->hw_domain)) {
@@ -973,12 +999,17 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
set_handle_irq(aic_handle_irq);
set_handle_fiq(aic_handle_fiq);
- for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
- aic_ic_write(irqc, irqc->info.mask_set + i * 4, U32_MAX);
- for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
- aic_ic_write(irqc, irqc->info.sw_clr + i * 4, U32_MAX);
- for (i = 0; i < irqc->nr_irq; i++)
- aic_ic_write(irqc, irqc->info.target_cpu + i * 4, 1);
+ off = 0;
+ for (die = 0; die < irqc->nr_die; die++) {
+ for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
+ aic_ic_write(irqc, irqc->info.mask_set + off + i * 4, U32_MAX);
+ for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
+ aic_ic_write(irqc, irqc->info.sw_clr + off + i * 4, U32_MAX);
+ if (irqc->info.target_cpu)
+ for (i = 0; i < irqc->nr_irq; i++)
+ aic_ic_write(irqc, irqc->info.target_cpu + off + i * 4, 1);
+ off += irqc->info.die_stride;
+ }
if (!is_kernel_in_hyp_mode())
pr_info("Kernel running in EL1, mapping interrupts");
@@ -992,8 +1023,8 @@ static int __init aic_of_ic_init(struct device_node *node, struct device_node *p
vgic_set_kvm_info(&vgic_info);
- pr_info("Initialized with %d/%d IRQs, %d FIQs, %d vIPIs",
- irqc->nr_irq, irqc->max_irq, AIC_NR_FIQ, AIC_NR_SWIPI);
+ pr_info("Initialized with %d/%d IRQs * %d/%d die(s), %d FIQs, %d vIPIs",
+ irqc->nr_irq, irqc->max_irq, irqc->nr_die, irqc->max_die, AIC_NR_FIQ, AIC_NR_SWIPI);
return 0;
}
--
2.33.0
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