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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V2 22/33] xen/arm: Use the device tree to map the address range and IRQ to dom0
- gic_route_irq_to_guest takes a dt_irq instead of an IRQ number
- remove hardcoded address/IRQ
Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
Changes in v2:
- Use the new function dt_irq_is_level_trigger
- Disable DEBUG_DT by default
- Rename parse_device_tree to map_device_from_device_tree
---
xen/arch/arm/domain_build.c | 144 +++++++++++++++++++++++++++++++++++++------
xen/arch/arm/gic.c | 12 ++--
xen/include/asm-arm/gic.h | 3 +-
3 files changed, 136 insertions(+), 23 deletions(-)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 6581492..0b762a9 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -14,6 +14,7 @@
#include <asm/setup.h>
#include <asm/gic.h>
+#include <xen/irq.h>
#include "kernel.h"
static unsigned int __initdata opt_dom0_max_vcpus;
@@ -30,6 +31,14 @@ static void __init parse_dom0_mem(const char *s)
}
custom_param("dom0_mem", parse_dom0_mem);
+//#define DEBUG_DT
+
+#ifdef DEBUG_DT
+# define DPRINT(fmt, args...) printk(XENLOG_DEBUG fmt, ##args)
+#else
+# define DPRINT(fmt, args...) do {} while ( 0 )
+#endif
+
/*
* Amount of extra space required to dom0's device tree. No new nodes
* are added (yet) but one terminating reserve map entry (16 bytes) is
@@ -303,6 +312,122 @@ static int write_nodes(struct domain *d, struct
kernel_info *kinfo,
return 0;
}
+/* Map the device in the domain */
+static int map_device(struct domain *d, const struct dt_device_node *dev)
+{
+ unsigned int nirq;
+ unsigned int naddr;
+ unsigned int i;
+ int res;
+ struct dt_irq irq;
+ struct dt_raw_irq rirq;
+ u64 addr, size;
+
+ nirq = dt_number_of_irq(dev);
+ naddr = dt_number_of_address(dev);
+
+ DPRINT("%s nirq = %d naddr = %u\n", dt_node_full_name(dev), nirq, naddr);
+
+ /* Map IRQs */
+ for ( i = 0; i < nirq; i++ )
+ {
+ res = dt_device_get_raw_irq(dev, i, &rirq);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to retrieve irq %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ /**
+ * Don't map IRQ that have no physical meaning
+ * ie: IRQ whose controller is not the GIC
+ */
+ if ( rirq.controller != dt_interrupt_controller )
+ {
+ DPRINT("irq %u skipped it controller (%s)\n",
+ i, dt_node_full_name(rirq.controller));
+ continue;
+ }
+
+ res = dt_irq_translate(&rirq, &irq);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to translate irq %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ DPRINT("irq %u = %u type = %#x\n", i, irq.irq, irq.type);
+ /* Don't check return because the IRQ can be use by multiple device */
+ gic_route_irq_to_guest(d, &irq, dt_node_name(dev));
+ }
+
+ /* Map the address ranges */
+ for ( i = 0; i < naddr; i++ )
+ {
+ res = dt_device_get_address(dev, i, &addr, &size);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to retrieve address %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ DPRINT("addr %u = %#"PRIx64" - %#"PRIx64"\n", i, addr, addr + size -
1);
+
+ res = map_mmio_regions(d, addr & PAGE_MASK,
+ PAGE_ALIGN(addr + size) - 1,
+ addr & PAGE_MASK);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to map %#"PRIx64" - %#"PRIx64" in
dom0\n",
+ addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
+ return res;
+ }
+ }
+
+ return 0;
+}
+
+static int handle_node(struct domain *d, const struct dt_device_node *np)
+{
+ const struct dt_device_node *child;
+ int res;
+
+ DPRINT("handle %s\n", dt_node_full_name(np));
+
+ /* Skip theses nodes and the sub-nodes */
+ if ( dt_device_is_compatible(np, "xen,xen") ||
+ dt_device_type_is_equal(np, "memory") ||
+ !strcmp("/chosen", dt_node_full_name(np)) )
+ return 0;
+
+ if ( dt_device_used_by(np) != DT_USED_BY_XEN )
+ {
+ res = map_device(d, np);
+
+ if ( res )
+ return res;
+ }
+
+ for ( child = np->child; child != NULL; child = child->sibling )
+ {
+ res = handle_node(d, child);
+ if ( res )
+ return res;
+ }
+
+ return 0;
+}
+
+static int map_device_from_device_tree(struct domain *d)
+{
+ ASSERT(dt_host && (dt_host->sibling == NULL));
+
+ return handle_node(d, dt_host);
+}
+
static int prepare_dtb(struct domain *d, struct kernel_info *kinfo)
{
void *fdt;
@@ -385,24 +510,7 @@ int construct_dom0(struct domain *d)
if ( rc < 0 )
return rc;
- printk("Map CS2 MMIO regions 1:1 in the P2M %#llx->%#llx\n",
0x18000000ULL, 0x1BFFFFFFULL);
- map_mmio_regions(d, 0x18000000, 0x1BFFFFFF, 0x18000000);
- printk("Map CS3 MMIO regions 1:1 in the P2M %#llx->%#llx\n",
0x1C000000ULL, 0x1FFFFFFFULL);
- map_mmio_regions(d, 0x1C000000, 0x1FFFFFFF, 0x1C000000);
-
- printk("Routing peripheral interrupts to guest\n");
- /* TODO Get from device tree */
- gic_route_irq_to_guest(d, 34, "timer0");
- /*gic_route_irq_to_guest(d, 37, "uart0"); -- XXX used by Xen*/
- gic_route_irq_to_guest(d, 38, "uart1");
- gic_route_irq_to_guest(d, 39, "uart2");
- gic_route_irq_to_guest(d, 40, "uart3");
- gic_route_irq_to_guest(d, 41, "mmc0-1");
- gic_route_irq_to_guest(d, 42, "mmc0-2");
- gic_route_irq_to_guest(d, 44, "keyboard");
- gic_route_irq_to_guest(d, 45, "mouse");
- gic_route_irq_to_guest(d, 46, "lcd");
- gic_route_irq_to_guest(d, 47, "eth");
+ map_device_from_device_tree(d);
/* The following loads use the domain's p2m */
p2m_load_VTTBR(d);
diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index f7b9889..ddad0c8 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -692,13 +692,14 @@ void gic_inject(void)
gic_inject_irq_start();
}
-int gic_route_irq_to_guest(struct domain *d, unsigned int irq,
+int gic_route_irq_to_guest(struct domain *d, const struct dt_irq *irq,
const char * devname)
{
struct irqaction *action;
- struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_desc *desc = irq_to_desc(irq->irq);
unsigned long flags;
int retval;
+ bool_t level;
action = xmalloc(struct irqaction);
if (!action)
@@ -706,6 +707,7 @@ int gic_route_irq_to_guest(struct domain *d, unsigned int
irq,
action->dev_id = d;
action->name = devname;
+ action->free_on_release = 1;
spin_lock_irqsave(&desc->lock, flags);
spin_lock(&gic.lock);
@@ -713,9 +715,11 @@ int gic_route_irq_to_guest(struct domain *d, unsigned int
irq,
desc->handler = &gic_guest_irq_type;
desc->status |= IRQ_GUEST;
- gic_set_irq_properties(irq, 1, 1u << smp_processor_id(), 0xa0);
+ level = dt_irq_is_level_trigger(irq);
+
+ gic_set_irq_properties(irq->irq, level, 1u << smp_processor_id(), 0xa0);
- retval = __setup_irq(desc, irq, action);
+ retval = __setup_irq(desc, irq->irq, action);
if (retval) {
xfree(action);
goto out;
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index e7608dc..513c1fc 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -157,7 +157,8 @@ extern int gic_events_need_delivery(void);
extern void __cpuinit init_maintenance_interrupt(void);
extern void gic_set_guest_irq(struct vcpu *v, unsigned int irq,
unsigned int state, unsigned int priority);
-extern int gic_route_irq_to_guest(struct domain *d, unsigned int irq,
+extern int gic_route_irq_to_guest(struct domain *d,
+ const struct dt_irq *irq,
const char * devname);
/* Accept an interrupt from the GIC and dispatch its handler */
--
Julien Grall
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