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PCI: rockchip: dw: Add affinity for legacy INTX

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We try to avoid to create and look up parent domain hierarchy, which is
a normal way we need because it's indeed is a hierarchy. Instead we set
affinity via parent irq by using irq_set_affinity API.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Change-Id: I04252b956b7c29fb5c156f1c8ff59adf82d5c638
This commit is contained in:
Shawn Lin
2022-03-18 17:34:20 +08:00
committed by Tao Huang
parent 3a450b7a0d
commit 504bc07b5b
1 changed files with 28 additions and 0 deletions
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28
drivers/pci/controller/dwc/pcie-dw-rockchip.c
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@@ -173,6 +173,7 @@ struct rk_pcie {
bool bifurcation;
struct regulator *vpcie3v3;
struct irq_domain *irq_domain;
int legacy_parent_irq;
raw_spinlock_t intx_lock;
u16 aspm;
};
@@ -1565,12 +1566,38 @@ static void rk_pcie_legacy_irq_unmask(struct irq_data *d)
raw_spin_unlock_irqrestore(&rk_pcie->intx_lock, flags);
}
#ifdef CONFIG_SMP
static int rk_pcie_irq_set_affinity(struct irq_data *d,
const struct cpumask *mask_val,
bool force)
{
unsigned int cpu;
struct rk_pcie *priv = irq_data_get_irq_chip_data(d);
if (!force)
cpu = cpumask_any_and(mask_val, cpu_online_mask);
else
cpu = cpumask_first(mask_val);
if (cpu >= nr_cpu_ids)
return -EINVAL;
irq_set_affinity(priv->legacy_parent_irq, cpumask_of(cpu));
irq_data_update_effective_affinity(d, cpumask_of(cpu));
return IRQ_SET_MASK_OK_DONE;
}
#endif
static struct irq_chip rk_pcie_legacy_irq_chip = {
.name = "rk-pcie-legacy-int",
.irq_enable = rk_pcie_legacy_irq_unmask,
.irq_disable = rk_pcie_legacy_irq_mask,
.irq_mask = rk_pcie_legacy_irq_mask,
.irq_unmask = rk_pcie_legacy_irq_unmask,
#ifdef CONFIG_SMP
.irq_set_affinity = rk_pcie_irq_set_affinity,
#endif
.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
};
@@ -1796,6 +1823,7 @@ retry_regulator:
if (!ret) {
irq = platform_get_irq_byname(pdev, "legacy");
if (irq >= 0) {
rk_pcie->legacy_parent_irq = irq;
irq_set_chained_handler_and_data(irq, rk_pcie_legacy_int_handler,
rk_pcie);
/* Unmask all legacy interrupt from INTA~INTD */