diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 112 |
1 files changed, 83 insertions, 29 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index efc531975302..660ec43b8d2d 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -97,6 +97,32 @@ static DEFINE_PER_CPU(bool, has_rss); /* Our default, arbitrary priority value. Linux only uses one anyway. */ #define DEFAULT_PMR_VALUE 0xf0 +enum gic_intid_range { + PPI_RANGE, + SPI_RANGE, + LPI_RANGE, + __INVALID_RANGE__ +}; + +static enum gic_intid_range __get_intid_range(irq_hw_number_t hwirq) +{ + switch (hwirq) { + case 16 ... 31: + return PPI_RANGE; + case 32 ... 1019: + return SPI_RANGE; + case 8192 ... GENMASK(23, 0): + return LPI_RANGE; + default: + return __INVALID_RANGE__; + } +} + +static enum gic_intid_range get_intid_range(struct irq_data *d) +{ + return __get_intid_range(d->hwirq); +} + static inline unsigned int gic_irq(struct irq_data *d) { return d->hwirq; @@ -104,18 +130,23 @@ static inline unsigned int gic_irq(struct irq_data *d) static inline int gic_irq_in_rdist(struct irq_data *d) { - return gic_irq(d) < 32; + return get_intid_range(d) == PPI_RANGE; } static inline void __iomem *gic_dist_base(struct irq_data *d) { - if (gic_irq_in_rdist(d)) /* SGI+PPI -> SGI_base for this CPU */ + switch (get_intid_range(d)) { + case PPI_RANGE: + /* SGI+PPI -> SGI_base for this CPU */ return gic_data_rdist_sgi_base(); - if (d->hwirq <= 1023) /* SPI -> dist_base */ + case SPI_RANGE: + /* SPI -> dist_base */ return gic_data.dist_base; - return NULL; + default: + return NULL; + } } static void gic_do_wait_for_rwp(void __iomem *base) @@ -196,24 +227,46 @@ static void gic_enable_redist(bool enable) /* * Routines to disable, enable, EOI and route interrupts */ +static u32 convert_offset_index(struct irq_data *d, u32 offset, u32 *index) +{ + switch (get_intid_range(d)) { + case PPI_RANGE: + case SPI_RANGE: + *index = d->hwirq; + return offset; + default: + break; + } + + WARN_ON(1); + *index = d->hwirq; + return offset; +} + static int gic_peek_irq(struct irq_data *d, u32 offset) { - u32 mask = 1 << (gic_irq(d) % 32); void __iomem *base; + u32 index, mask; + + offset = convert_offset_index(d, offset, &index); + mask = 1 << (index % 32); if (gic_irq_in_rdist(d)) base = gic_data_rdist_sgi_base(); else base = gic_data.dist_base; - return !!(readl_relaxed(base + offset + (gic_irq(d) / 32) * 4) & mask); + return !!(readl_relaxed(base + offset + (index / 32) * 4) & mask); } static void gic_poke_irq(struct irq_data *d, u32 offset) { - u32 mask = 1 << (gic_irq(d) % 32); void (*rwp_wait)(void); void __iomem *base; + u32 index, mask; + + offset = convert_offset_index(d, offset, &index); + mask = 1 << (index % 32); if (gic_irq_in_rdist(d)) { base = gic_data_rdist_sgi_base(); @@ -223,7 +276,7 @@ static void gic_poke_irq(struct irq_data *d, u32 offset) rwp_wait = gic_dist_wait_for_rwp; } - writel_relaxed(mask, base + offset + (gic_irq(d) / 32) * 4); + writel_relaxed(mask, base + offset + (index / 32) * 4); rwp_wait(); } @@ -316,8 +369,11 @@ static int gic_irq_get_irqchip_state(struct irq_data *d, static void gic_irq_set_prio(struct irq_data *d, u8 prio) { void __iomem *base = gic_dist_base(d); + u32 offset, index; - writeb_relaxed(prio, base + GICD_IPRIORITYR + gic_irq(d)); + offset = convert_offset_index(d, GICD_IPRIORITYR, &index); + + writeb_relaxed(prio, base + offset + index); } static int gic_irq_nmi_setup(struct irq_data *d) @@ -407,6 +463,7 @@ static int gic_set_type(struct irq_data *d, unsigned int type) unsigned int irq = gic_irq(d); void (*rwp_wait)(void); void __iomem *base; + u32 offset, index; int ret; /* Interrupt configuration for SGIs can't be changed */ @@ -426,8 +483,9 @@ static int gic_set_type(struct irq_data *d, unsigned int type) rwp_wait = gic_dist_wait_for_rwp; } + offset = convert_offset_index(d, GICD_ICFGR, &index); - ret = gic_configure_irq(irq, type, base + GICD_ICFGR, rwp_wait); + ret = gic_configure_irq(index, type, base + offset, rwp_wait); if (ret && irq < 32) { /* Misconfigured PPIs are usually not fatal */ pr_warn("GIC: PPI%d is secure or misconfigured\n", irq - 16); @@ -970,6 +1028,7 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, bool force) { unsigned int cpu; + u32 offset, index; void __iomem *reg; int enabled; u64 val; @@ -990,7 +1049,8 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, if (enabled) gic_mask_irq(d); - reg = gic_dist_base(d) + GICD_IROUTER + (gic_irq(d) * 8); + offset = convert_offset_index(d, GICD_IROUTER, &index); + reg = gic_dist_base(d) + offset + (index * 8); val = gic_mpidr_to_affinity(cpu_logical_map(cpu)); gic_write_irouter(val, reg); @@ -1084,36 +1144,30 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, if (static_branch_likely(&supports_deactivate_key)) chip = &gic_eoimode1_chip; - /* SGIs are private to the core kernel */ - if (hw < 16) - return -EPERM; - /* Nothing here */ - if (hw >= gic_data.irq_nr && hw < 8192) - return -EPERM; - /* Off limits */ - if (hw >= GIC_ID_NR) - return -EPERM; - - /* PPIs */ - if (hw < 32) { + switch (__get_intid_range(hw)) { + case PPI_RANGE: irq_set_percpu_devid(irq); irq_domain_set_info(d, irq, hw, chip, d->host_data, handle_percpu_devid_irq, NULL, NULL); irq_set_status_flags(irq, IRQ_NOAUTOEN); - } - /* SPIs */ - if (hw >= 32 && hw < gic_data.irq_nr) { + break; + + case SPI_RANGE: irq_domain_set_info(d, irq, hw, chip, d->host_data, handle_fasteoi_irq, NULL, NULL); irq_set_probe(irq); irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq))); - } - /* LPIs */ - if (hw >= 8192 && hw < GIC_ID_NR) { + break; + + case LPI_RANGE: if (!gic_dist_supports_lpis()) return -EPERM; irq_domain_set_info(d, irq, hw, chip, d->host_data, handle_fasteoi_irq, NULL, NULL); + break; + + default: + return -EPERM; } return 0; |