u32 psz;
};
+struct its_device;
+
/*
* The ITS structure - contains most of the infrastructure, with the
* top-level MSI domain, the command queue, the collections, and the
struct its_cmd_block *cmd_write;
struct its_baser tables[GITS_BASER_NR_REGS];
struct its_collection *collections;
+ struct fwnode_handle *fwnode_handle;
+ u64 (*get_msi_base)(struct its_device *its_dev);
struct list_head its_device_list;
u64 flags;
u32 ite_size;
u32 device_ids;
int numa_node;
+ unsigned int msi_domain_flags;
+ u32 pre_its_base; /* for Socionext Synquacer */
bool is_v4;
};
return IRQ_SET_MASK_OK_DONE;
}
+static u64 its_irq_get_msi_base(struct its_device *its_dev)
+{
+ struct its_node *its = its_dev->its;
+
+ return its->phys_base + GITS_TRANSLATER;
+}
+
static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg)
{
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
u64 addr;
its = its_dev->its;
- addr = its->phys_base + GITS_TRANSLATER;
+ addr = its->get_msi_base(its_dev);
msg->address_lo = lower_32_bits(addr);
msg->address_hi = upper_32_bits(addr);
return true;
}
+static u64 its_irq_get_msi_base_pre_its(struct its_device *its_dev)
+{
+ struct its_node *its = its_dev->its;
+
+ /*
+ * The Socionext Synquacer SoC has a so-called 'pre-ITS',
+ * which maps 32-bit writes targeted at a separate window of
+ * size '4 << device_id_bits' onto writes to GITS_TRANSLATER
+ * with device ID taken from bits [device_id_bits + 1:2] of
+ * the window offset.
+ */
+ return its->pre_its_base + (its_dev->device_id << 2);
+}
+
+static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data)
+{
+ struct its_node *its = data;
+ u32 pre_its_window[2];
+ u32 ids;
+
+ if (!fwnode_property_read_u32_array(its->fwnode_handle,
+ "socionext,synquacer-pre-its",
+ pre_its_window,
+ ARRAY_SIZE(pre_its_window))) {
+
+ its->pre_its_base = pre_its_window[0];
+ its->get_msi_base = its_irq_get_msi_base_pre_its;
+
+ ids = ilog2(pre_its_window[1]) - 2;
+ if (its->device_ids > ids)
+ its->device_ids = ids;
+
+ /* the pre-ITS breaks isolation, so disable MSI remapping */
+ its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP;
+ return true;
+ }
+ return false;
+}
+
static const struct gic_quirk its_quirks[] = {
#ifdef CONFIG_CAVIUM_ERRATUM_22375
{
.init = its_enable_quirk_qdf2400_e0065,
},
#endif
+#ifdef CONFIG_SOCIONEXT_SYNQUACER_PREITS
+ {
+ /*
+ * The Socionext Synquacer SoC incorporates ARM's own GIC-500
+ * implementation, but with a 'pre-ITS' added that requires
+ * special handling in software.
+ */
+ .desc = "ITS: Socionext Synquacer pre-ITS",
+ .iidr = 0x0001143b,
+ .mask = 0xffffffff,
+ .init = its_enable_quirk_socionext_synquacer,
+ },
+#endif
{
}
};
inner_domain->parent = its_parent;
irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS);
- inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_REMAP;
+ inner_domain->flags |= its->msi_domain_flags;
info->ops = &its_msi_domain_ops;
info->data = its;
inner_domain->host_data = info;
goto out_free_its;
}
its->cmd_write = its->cmd_base;
+ its->fwnode_handle = handle;
+ its->get_msi_base = its_irq_get_msi_base;
+ its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP;
its_enable_quirks(its);