diff options
Diffstat (limited to 'drivers/irqchip/irq-gic-v3-its.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 83 |
1 files changed, 70 insertions, 13 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 25ceae9f7348..e23d1d18f9d6 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -37,7 +37,10 @@ #include <asm/cputype.h> #include <asm/exception.h> -#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1 << 0) +#include "irq-gic-common.h" + +#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) +#define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) #define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0) @@ -817,7 +820,22 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) int i; int psz = SZ_64K; u64 shr = GITS_BASER_InnerShareable; - u64 cache = GITS_BASER_WaWb; + u64 cache; + u64 typer; + u32 ids; + + if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) { + /* + * erratum 22375: only alloc 8MB table size + * erratum 24313: ignore memory access type + */ + cache = 0; + ids = 0x14; /* 20 bits, 8MB */ + } else { + cache = GITS_BASER_WaWb; + typer = readq_relaxed(its->base + GITS_TYPER); + ids = GITS_TYPER_DEVBITS(typer); + } for (i = 0; i < GITS_BASER_NR_REGS; i++) { u64 val = readq_relaxed(its->base + GITS_BASER + i * 8); @@ -825,6 +843,7 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) u64 entry_size = GITS_BASER_ENTRY_SIZE(val); int order = get_order(psz); int alloc_size; + int alloc_pages; u64 tmp; void *base; @@ -840,9 +859,6 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) * For other tables, only allocate a single page. */ if (type == GITS_BASER_TYPE_DEVICE) { - u64 typer = readq_relaxed(its->base + GITS_TYPER); - u32 ids = GITS_TYPER_DEVBITS(typer); - /* * 'order' was initialized earlier to the default page * granule of the the ITS. We can't have an allocation @@ -859,6 +875,14 @@ static int its_alloc_tables(const char *node_name, struct its_node *its) } alloc_size = (1 << order) * PAGE_SIZE; + alloc_pages = (alloc_size / psz); + if (alloc_pages > GITS_BASER_PAGES_MAX) { + alloc_pages = GITS_BASER_PAGES_MAX; + order = get_order(GITS_BASER_PAGES_MAX * psz); + pr_warn("%s: Device Table too large, reduce its page order to %u (%u pages)\n", + node_name, order, alloc_pages); + } + base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order); if (!base) { err = -ENOMEM; @@ -887,7 +911,7 @@ retry_baser: break; } - val |= (alloc_size / psz) - 1; + val |= alloc_pages - 1; writeq_relaxed(val, its->base + GITS_BASER + i * 8); tmp = readq_relaxed(its->base + GITS_BASER + i * 8); @@ -1241,15 +1265,19 @@ static int its_irq_gic_domain_alloc(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hwirq) { - struct of_phandle_args args; + struct irq_fwspec fwspec; - args.np = domain->parent->of_node; - args.args_count = 3; - args.args[0] = GIC_IRQ_TYPE_LPI; - args.args[1] = hwirq; - args.args[2] = IRQ_TYPE_EDGE_RISING; + if (irq_domain_get_of_node(domain->parent)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 3; + fwspec.param[0] = GIC_IRQ_TYPE_LPI; + fwspec.param[1] = hwirq; + fwspec.param[2] = IRQ_TYPE_EDGE_RISING; + } else { + return -EINVAL; + } - return irq_domain_alloc_irqs_parent(domain, virq, 1, &args); + return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); } static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, @@ -1370,6 +1398,33 @@ static int its_force_quiescent(void __iomem *base) } } +static void __maybe_unused its_enable_quirk_cavium_22375(void *data) +{ + struct its_node *its = data; + + its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; +} + +static const struct gic_quirk its_quirks[] = { +#ifdef CONFIG_CAVIUM_ERRATUM_22375 + { + .desc = "ITS: Cavium errata 22375, 24313", + .iidr = 0xa100034c, /* ThunderX pass 1.x */ + .mask = 0xffff0fff, + .init = its_enable_quirk_cavium_22375, + }, +#endif + { + } +}; + +static void its_enable_quirks(struct its_node *its) +{ + u32 iidr = readl_relaxed(its->base + GITS_IIDR); + + gic_enable_quirks(iidr, its_quirks, its); +} + static int its_probe(struct device_node *node, struct irq_domain *parent) { struct resource res; @@ -1428,6 +1483,8 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) } its->cmd_write = its->cmd_base; + its_enable_quirks(its); + err = its_alloc_tables(node->full_name, its); if (err) goto out_free_cmd; |