[PATCH V3 06/10] irqchip, GICv3, ITS: Refator ITS dt init code to prepare for ACPI.
Tomasz Nowicki
tn at semihalf.com
Tue Jan 19 05:11:19 PST 2016
Similarly to GICv3 core, we need to extract common code before adding
ACPI support. No functional changes.
Signed-off-by: Hanjun Guo <hanjun.guo at linaro.org>
Signed-off-by: Tomasz Nowicki <tn at semihalf.com>
---
drivers/irqchip/irq-gic-v3-its.c | 82 +++++++++++++++++++++++---------------
drivers/irqchip/irq-gic-v3.c | 6 +--
include/linux/irqchip/arm-gic-v3.h | 2 +-
3 files changed, 52 insertions(+), 38 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 2bbed18..fecb7a6 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -813,7 +813,7 @@ static void its_free_tables(struct its_node *its)
}
}
-static int its_alloc_tables(const char *node_name, struct its_node *its)
+static int its_alloc_tables(struct its_node *its)
{
int err;
int i;
@@ -868,8 +868,8 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
order);
if (order >= MAX_ORDER) {
order = MAX_ORDER - 1;
- pr_warn("%s: Device Table too large, reduce its page order to %u\n",
- node_name, order);
+ pr_warn("ITS at 0x%lx: Device Table too large, reduce its page order to %u\n",
+ its->phys_base, order);
}
}
@@ -878,8 +878,8 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
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);
+ pr_warn("ITS at 0x%lx: Device Table too large, reduce its page order to %u (%u pages)\n",
+ its->phys_base, order, alloc_pages);
}
base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
@@ -948,8 +948,8 @@ retry_baser:
}
if (val != tmp) {
- pr_err("ITS: %s: GITS_BASER%d doesn't stick: %lx %lx\n",
- node_name, i,
+ pr_err("ITS at 0x%lx: GITS_BASER%d doesn't stick: %lx %lx\n",
+ its->phys_base, i,
(unsigned long) val, (unsigned long) tmp);
err = -ENXIO;
goto out_free;
@@ -1424,10 +1424,11 @@ static void its_enable_quirks(struct its_node *its)
gic_enable_quirks(iidr, its_quirks, its);
}
-static int __init its_probe(struct device_node *node,
- struct irq_domain *parent)
+static int __init its_probe_one(phys_addr_t phys_base, unsigned long size,
+ struct irq_domain *parent,
+ bool is_msi_controller,
+ struct fwnode_handle *handler)
{
- struct resource res;
struct its_node *its;
void __iomem *its_base;
struct irq_domain *inner_domain;
@@ -1435,33 +1436,26 @@ static int __init its_probe(struct device_node *node,
u64 baser, tmp;
int err;
- err = of_address_to_resource(node, 0, &res);
- if (err) {
- pr_warn("%s: no regs?\n", node->full_name);
- return -ENXIO;
- }
-
- its_base = ioremap(res.start, resource_size(&res));
+ its_base = ioremap(phys_base, size);
if (!its_base) {
- pr_warn("%s: unable to map registers\n", node->full_name);
+ pr_warn("Unable to map ITS registers\n");
return -ENOMEM;
}
val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK;
if (val != 0x30 && val != 0x40) {
- pr_warn("%s: no ITS detected, giving up\n", node->full_name);
+ pr_warn("No ITS detected, giving up\n");
err = -ENODEV;
goto out_unmap;
}
err = its_force_quiescent(its_base);
if (err) {
- pr_warn("%s: failed to quiesce, giving up\n",
- node->full_name);
+ pr_warn("Failed to quiesce, giving up\n");
goto out_unmap;
}
- pr_info("ITS: %s\n", node->full_name);
+ pr_info("ITS at 0x%lx\n", (long)phys_base);
its = kzalloc(sizeof(*its), GFP_KERNEL);
if (!its) {
@@ -1473,7 +1467,7 @@ static int __init its_probe(struct device_node *node,
INIT_LIST_HEAD(&its->entry);
INIT_LIST_HEAD(&its->its_device_list);
its->base = its_base;
- its->phys_base = res.start;
+ its->phys_base = phys_base;
its->ite_size = ((readl_relaxed(its_base + GITS_TYPER) >> 4) & 0xf) + 1;
its->cmd_base = kzalloc(ITS_CMD_QUEUE_SZ, GFP_KERNEL);
@@ -1485,7 +1479,7 @@ static int __init its_probe(struct device_node *node,
its_enable_quirks(its);
- err = its_alloc_tables(node->full_name, its);
+ err = its_alloc_tables(its);
if (err)
goto out_free_cmd;
@@ -1521,7 +1515,7 @@ static int __init its_probe(struct device_node *node,
writeq_relaxed(0, its->base + GITS_CWRITER);
writel_relaxed(GITS_CTLR_ENABLE, its->base + GITS_CTLR);
- if (of_property_read_bool(node, "msi-controller")) {
+ if (is_msi_controller) {
struct msi_domain_info *info;
info = kzalloc(sizeof(*info), GFP_KERNEL);
@@ -1530,7 +1524,8 @@ static int __init its_probe(struct device_node *node,
goto out_free_tables;
}
- inner_domain = irq_domain_add_tree(node, &its_domain_ops, its);
+ inner_domain = irq_domain_create_tree(handler, &its_domain_ops,
+ its);
if (!inner_domain) {
err = -ENOMEM;
kfree(info);
@@ -1558,10 +1553,28 @@ out_free_its:
kfree(its);
out_unmap:
iounmap(its_base);
- pr_err("ITS: failed probing %s (%d)\n", node->full_name, err);
+ pr_err("ITS at 0x%lx: failed probing (%d)\n", (long)phys_base, err);
return err;
}
+static int __init
+its_of_probe(struct device_node *node, struct irq_domain *parent)
+{
+ struct resource res;
+ bool is_msi_controller = false;
+
+ if (of_address_to_resource(node, 0, &res)) {
+ pr_warn("%s: no regs?\n", node->full_name);
+ return -ENXIO;
+ }
+
+ if (of_property_read_bool(node, "msi-controller"))
+ is_msi_controller = true;
+
+ return its_probe_one(res.start, resource_size(&res), parent,
+ is_msi_controller, &node->fwnode);
+}
+
static bool gic_rdists_supports_plpis(void)
{
return !!(readl_relaxed(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS);
@@ -1586,14 +1599,17 @@ static struct of_device_id its_device_id[] = {
{},
};
-int __init its_init(struct device_node *node, struct rdists *rdists,
- struct irq_domain *parent_domain)
+int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
+ struct irq_domain *parent_domain)
{
- struct device_node *np;
+ struct device_node *np, *of_node;
- for (np = of_find_matching_node(node, its_device_id); np;
- np = of_find_matching_node(np, its_device_id)) {
- its_probe(np, parent_domain);
+ of_node = to_of_node(handle);
+ if (of_node) {
+ for (np = of_find_matching_node(of_node, its_device_id); np;
+ np = of_find_matching_node(np, its_device_id)) {
+ its_of_probe(np, parent_domain);
+ }
}
if (list_empty(&its_nodes)) {
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index dd16a60..995b7251 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -832,7 +832,6 @@ static int __init gic_init_bases(void __iomem *dist_base,
u64 redist_stride,
struct fwnode_handle *handle)
{
- struct device_node *node;
u32 typer;
int gic_irqs;
int err;
@@ -872,10 +871,9 @@ static int __init gic_init_bases(void __iomem *dist_base,
set_handle_irq(gic_handle_irq);
- node = to_of_node(handle);
if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis() &&
- node) /* Temp hack to prevent ITS init for ACPI */
- its_init(node, &gic_data.rdists, gic_data.domain);
+ to_of_node(handle)) /* Temp hack to prevent ITS init for ACPI */
+ its_init(handle, &gic_data.rdists, gic_data.domain);
gic_smp_init();
gic_dist_init();
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index d5d798b..a40ed7d 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -332,7 +332,7 @@ struct rdists {
struct irq_domain;
struct device_node;
int its_cpu_init(void);
-int its_init(struct device_node *node, struct rdists *rdists,
+int its_init(struct fwnode_handle *handle, struct rdists *rdists,
struct irq_domain *domain);
static inline bool gic_enable_sre(void)
--
1.9.1
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