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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [XEN][RFC PATCH v2 01/12] device tree: Remove __init from function type
Change function type of following function to access during runtime:
1. map_irq_to_domain()
2. handle_device_interrupt()
3. map_range_to_domain()
4. unflatten_dt_node()
5. unflatten_device_tree()
Move map_irq_to_domain(), handle_device_interrupt() and map_range_to_domain() to
device.c.
Move map_range_data declaration to domain_build.h.
These changes are done to support the dynamic programming of a nodes where an
overlay node will be added to fdt and unflattened node will be added to dt_host.
Furthermore, IRQ and mmio mapping will be done for the added node.
Signed-off-by: Vikram Garhwal <fnu.vikram@xxxxxxxxxx>
---
xen/arch/arm/device.c | 146 ++++++++++++++++++++++++++++++++++++
xen/arch/arm/domain_build.c | 150 -------------------------------------
xen/common/device_tree.c | 18 ++---
xen/include/asm-arm/domain_build.h | 10 +++
xen/include/xen/device_tree.h | 5 ++
5 files changed, 170 insertions(+), 159 deletions(-)
diff --git a/xen/arch/arm/device.c b/xen/arch/arm/device.c
index 70cd6c1..c7cf2b9 100644
--- a/xen/arch/arm/device.c
+++ b/xen/arch/arm/device.c
@@ -21,6 +21,8 @@
#include <xen/errno.h>
#include <xen/init.h>
#include <xen/lib.h>
+#include <xen/iocap.h>
+#include <asm/domain_build.h>
extern const struct device_desc _sdevice[], _edevice[];
extern const struct acpi_device_desc _asdevice[], _aedevice[];
@@ -84,6 +86,150 @@ enum device_class device_get_class(const struct
dt_device_node *dev)
return DEVICE_UNKNOWN;
}
+int map_irq_to_domain(struct domain *d, unsigned int irq,
+ bool need_mapping, const char *devname)
+{
+ int res;
+
+ res = irq_permit_access(d, irq);
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to permit to dom%u access to IRQ %u\n",
+ d->domain_id, irq);
+ return res;
+ }
+
+ if ( need_mapping )
+ {
+ /*
+ * Checking the return of vgic_reserve_virq is not
+ * necessary. It should not fail except when we try to map
+ * the IRQ twice. This can legitimately happen if the IRQ is shared
+ */
+ vgic_reserve_virq(d, irq);
+
+ res = route_irq_to_guest(d, irq, irq, devname);
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to map IRQ%"PRId32" to dom%d\n",
+ irq, d->domain_id);
+ return res;
+ }
+ }
+
+ dt_dprintk(" - IRQ: %u\n", irq);
+ return 0;
+}
+
+int map_range_to_domain(const struct dt_device_node *dev,
+ u64 addr, u64 len,
+ void *data)
+{
+ struct map_range_data *mr_data = data;
+ struct domain *d = mr_data->d;
+ bool need_mapping = !dt_device_for_passthrough(dev);
+ int res;
+
+ /*
+ * reserved-memory regions are RAM carved out for a special purpose.
+ * They are not MMIO and therefore a domain should not be able to
+ * manage them via the IOMEM interface.
+ */
+ if ( strncasecmp(dt_node_full_name(dev), "/reserved-memory/",
+ strlen("/reserved-memory/")) != 0 )
+ {
+ res = iomem_permit_access(d, paddr_to_pfn(addr),
+ paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
+ if ( res )
+ {
+ printk(XENLOG_ERR "Unable to permit to dom%d access to"
+ " 0x%"PRIx64" - 0x%"PRIx64"\n",
+ d->domain_id,
+ addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
+ return res;
+ }
+ }
+
+ if ( need_mapping )
+ {
+ res = map_regions_p2mt(d,
+ gaddr_to_gfn(addr),
+ PFN_UP(len),
+ maddr_to_mfn(addr),
+ mr_data->p2mt);
+
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to map 0x%"PRIx64
+ " - 0x%"PRIx64" in domain %d\n",
+ addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1,
+ d->domain_id);
+ return res;
+ }
+ }
+
+ dt_dprintk(" - MMIO: %010"PRIx64" - %010"PRIx64" P2MType=%x\n",
+ addr, addr + len, mr_data->p2mt);
+
+ return 0;
+}
+
+/*
+ * handle_device_interrupts retrieves the interrupts configuration from
+ * a device tree node and maps those interrupts to the target domain.
+ *
+ * Returns:
+ * < 0 error
+ * 0 success
+ */
+int handle_device_interrupts(struct domain *d,
+ struct dt_device_node *dev,
+ bool need_mapping)
+{
+ unsigned int i, nirq;
+ int res;
+ struct dt_raw_irq rirq;
+
+ nirq = dt_number_of_irq(dev);
+
+ /* Give permission and 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 )
+ {
+ dt_dprintk("irq %u not connected to primary controller. Connected
to %s\n",
+ i, dt_node_full_name(rirq.controller));
+ continue;
+ }
+
+ res = platform_get_irq(dev, i);
+ if ( res < 0 )
+ {
+ printk(XENLOG_ERR "Unable to get irq %u for %s\n",
+ i, dt_node_full_name(dev));
+ return res;
+ }
+
+ res = map_irq_to_domain(d, res, need_mapping, dt_node_name(dev));
+ if ( res )
+ return res;
+ }
+
+ return 0;
+}
+
/*
* Local variables:
* mode: C
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 0167731..3e8f6da 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -51,12 +51,6 @@ static int __init parse_dom0_mem(const char *s)
}
custom_param("dom0_mem", parse_dom0_mem);
-struct map_range_data
-{
- struct domain *d;
- p2m_type_t p2mt;
-};
-
/* Override macros from asm/page.h to make them work with mfn_t */
#undef virt_to_mfn
#define virt_to_mfn(va) _mfn(__virt_to_mfn(va))
@@ -1624,41 +1618,6 @@ int __init make_chosen_node(const struct kernel_info
*kinfo)
return res;
}
-int __init map_irq_to_domain(struct domain *d, unsigned int irq,
- bool need_mapping, const char *devname)
-{
- int res;
-
- res = irq_permit_access(d, irq);
- if ( res )
- {
- printk(XENLOG_ERR "Unable to permit to dom%u access to IRQ %u\n",
- d->domain_id, irq);
- return res;
- }
-
- if ( need_mapping )
- {
- /*
- * Checking the return of vgic_reserve_virq is not
- * necessary. It should not fail except when we try to map
- * the IRQ twice. This can legitimately happen if the IRQ is shared
- */
- vgic_reserve_virq(d, irq);
-
- res = route_irq_to_guest(d, irq, irq, devname);
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to map IRQ%"PRId32" to dom%d\n",
- irq, d->domain_id);
- return res;
- }
- }
-
- dt_dprintk(" - IRQ: %u\n", irq);
- return 0;
-}
-
static int __init map_dt_irq_to_domain(const struct dt_device_node *dev,
const struct dt_irq *dt_irq,
void *data)
@@ -1690,59 +1649,6 @@ static int __init map_dt_irq_to_domain(const struct
dt_device_node *dev,
return 0;
}
-static int __init map_range_to_domain(const struct dt_device_node *dev,
- u64 addr, u64 len,
- void *data)
-{
- struct map_range_data *mr_data = data;
- struct domain *d = mr_data->d;
- bool need_mapping = !dt_device_for_passthrough(dev);
- int res;
-
- /*
- * reserved-memory regions are RAM carved out for a special purpose.
- * They are not MMIO and therefore a domain should not be able to
- * manage them via the IOMEM interface.
- */
- if ( strncasecmp(dt_node_full_name(dev), "/reserved-memory/",
- strlen("/reserved-memory/")) != 0 )
- {
- res = iomem_permit_access(d, paddr_to_pfn(addr),
- paddr_to_pfn(PAGE_ALIGN(addr + len - 1)));
- if ( res )
- {
- printk(XENLOG_ERR "Unable to permit to dom%d access to"
- " 0x%"PRIx64" - 0x%"PRIx64"\n",
- d->domain_id,
- addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1);
- return res;
- }
- }
-
- if ( need_mapping )
- {
- res = map_regions_p2mt(d,
- gaddr_to_gfn(addr),
- PFN_UP(len),
- maddr_to_mfn(addr),
- mr_data->p2mt);
-
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to map 0x%"PRIx64
- " - 0x%"PRIx64" in domain %d\n",
- addr & PAGE_MASK, PAGE_ALIGN(addr + len) - 1,
- d->domain_id);
- return res;
- }
- }
-
- dt_dprintk(" - MMIO: %010"PRIx64" - %010"PRIx64" P2MType=%x\n",
- addr, addr + len, mr_data->p2mt);
-
- return 0;
-}
-
/*
* For a node which describes a discoverable bus (such as a PCI bus)
* then we may need to perform additional mappings in order to make
@@ -1773,62 +1679,6 @@ static int __init map_device_children(struct domain *d,
}
/*
- * handle_device_interrupts retrieves the interrupts configuration from
- * a device tree node and maps those interrupts to the target domain.
- *
- * Returns:
- * < 0 error
- * 0 success
- */
-static int __init handle_device_interrupts(struct domain *d,
- struct dt_device_node *dev,
- bool need_mapping)
-{
- unsigned int i, nirq;
- int res;
- struct dt_raw_irq rirq;
-
- nirq = dt_number_of_irq(dev);
-
- /* Give permission and 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 )
- {
- dt_dprintk("irq %u not connected to primary controller. Connected
to %s\n",
- i, dt_node_full_name(rirq.controller));
- continue;
- }
-
- res = platform_get_irq(dev, i);
- if ( res < 0 )
- {
- printk(XENLOG_ERR "Unable to get irq %u for %s\n",
- i, dt_node_full_name(dev));
- return res;
- }
-
- res = map_irq_to_domain(d, res, need_mapping, dt_node_name(dev));
- if ( res )
- return res;
- }
-
- return 0;
-}
-
-/*
* For a given device node:
* - Give permission to the guest to manage IRQ and MMIO range
* - Retrieve the IRQ configuration (i.e edge/level) from device tree
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index 92ce59e..88f3f7e 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -1821,12 +1821,12 @@ int dt_count_phandle_with_args(const struct
dt_device_node *np,
* @allnextpp: pointer to ->allnext from last allocated device_node
* @fpsize: Size of the node path up at the current depth.
*/
-static unsigned long __init unflatten_dt_node(const void *fdt,
- unsigned long mem,
- unsigned long *p,
- struct dt_device_node *dad,
- struct dt_device_node
***allnextpp,
- unsigned long fpsize)
+static unsigned long unflatten_dt_node(const void *fdt,
+ unsigned long mem,
+ unsigned long *p,
+ struct dt_device_node *dad,
+ struct dt_device_node ***allnextpp,
+ unsigned long fpsize)
{
struct dt_device_node *np;
struct dt_property *pp, **prev_pp = NULL;
@@ -2057,7 +2057,7 @@ static unsigned long __init unflatten_dt_node(const void
*fdt,
}
/**
- * __unflatten_device_tree - create tree of device_nodes from flat blob
+ * unflatten_device_tree - create tree of device_nodes from flat blob
*
* unflattens a device-tree, creating the
* tree of struct device_node. It also fills the "name" and "type"
@@ -2066,7 +2066,7 @@ static unsigned long __init unflatten_dt_node(const void
*fdt,
* @fdt: The fdt to expand
* @mynodes: The device_node tree created by the call
*/
-static void __init __unflatten_device_tree(const void *fdt,
+void unflatten_device_tree(const void *fdt,
struct dt_device_node **mynodes)
{
unsigned long start, mem, size;
@@ -2189,7 +2189,7 @@ dt_find_interrupt_controller(const struct dt_device_match
*matches)
void __init dt_unflatten_host_device_tree(void)
{
- __unflatten_device_tree(device_tree_flattened, &dt_host);
+ unflatten_device_tree(device_tree_flattened, &dt_host);
dt_alias_scan();
}
diff --git a/xen/include/asm-arm/domain_build.h
b/xen/include/asm-arm/domain_build.h
index 34ceddc..17449b1 100644
--- a/xen/include/asm-arm/domain_build.h
+++ b/xen/include/asm-arm/domain_build.h
@@ -4,10 +4,20 @@
#include <xen/sched.h>
#include <asm/kernel.h>
+struct map_range_data
+{
+ struct domain *d;
+ p2m_type_t p2mt;
+};
+
int map_irq_to_domain(struct domain *d, unsigned int irq,
bool need_mapping, const char *devname);
int make_chosen_node(const struct kernel_info *kinfo);
void evtchn_allocate(struct domain *d);
+int handle_device_interrupts(struct domain *d, struct dt_device_node *dev,
+ bool need_mapping);
+int map_range_to_domain(const struct dt_device_node *dev, u64 addr, u64 len,
+ void *data);
#ifndef CONFIG_ACPI
static inline int prepare_acpi(struct domain *d, struct kernel_info *kinfo)
diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index 573e4a0..9fc63ab 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -177,6 +177,11 @@ int device_tree_for_each_node(const void *fdt, int node,
*/
void dt_unflatten_host_device_tree(void);
+/*
+ * unflatten any device tree.
+ */
+void unflatten_device_tree(const void *fdt, struct dt_device_node **mynodes);
+
/**
* IRQ translation callback
* TODO: For the moment we assume that we only have ONE
--
2.7.4
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