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-rw-r--r--drivers/of/Kconfig10
-rw-r--r--drivers/of/address.c11
-rw-r--r--drivers/of/base.c5
-rw-r--r--drivers/of/device.c11
-rw-r--r--drivers/of/fdt.c19
-rw-r--r--drivers/of/irq.c193
-rw-r--r--drivers/of/of_pci.c36
-rw-r--r--drivers/of/of_reserved_mem.c52
-rw-r--r--drivers/of/overlay.c5
-rw-r--r--drivers/of/platform.c8
-rw-r--r--drivers/of/unittest.c8
11 files changed, 310 insertions, 48 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 59bb8556e..e2a48415d 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -23,6 +23,16 @@ config OF_UNITTEST
If unsure, say N here, but this option is safe to enable.
+config OF_ALL_DTBS
+ bool "Build all Device Tree Blobs"
+ depends on COMPILE_TEST
+ select DTC
+ help
+ This option builds all possible Device Tree Blobs (DTBs) for the
+ current architecture.
+
+ If unsure, say N here, but this option is safe to enable.
+
config OF_FLATTREE
bool
select DTC
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 384574c39..9582c5703 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -330,6 +330,12 @@ int of_pci_range_to_resource(struct of_pci_range *range,
}
res->start = port;
} else {
+ if ((sizeof(resource_size_t) < 8) &&
+ upper_32_bits(range->cpu_addr)) {
+ err = -EINVAL;
+ goto invalid_range;
+ }
+
res->start = range->cpu_addr;
}
res->end = res->start + range->size - 1;
@@ -479,9 +485,10 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
int rone;
u64 offset = OF_BAD_ADDR;
- /* Normally, an absence of a "ranges" property means we are
+ /*
+ * Normally, an absence of a "ranges" property means we are
* crossing a non-translatable boundary, and thus the addresses
- * below the current not cannot be converted to CPU physical ones.
+ * below the current cannot be converted to CPU physical ones.
* Unfortunately, while this is very clear in the spec, it's not
* what Apple understood, and they do have things like /uni-n or
* /ht nodes with no "ranges" property and a lot of perfectly
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 8b5a187a7..017dd94f1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -375,10 +375,7 @@ bool __weak arch_find_n_match_cpu_physical_id(struct device_node *cpun,
cpu, thread))
return true;
- if (__of_find_n_match_cpu_property(cpun, "reg", cpu, thread))
- return true;
-
- return false;
+ return __of_find_n_match_cpu_property(cpun, "reg", cpu, thread);
}
/**
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 8b91ea241..e5f47cec7 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -60,11 +60,12 @@ int of_device_add(struct platform_device *ofdev)
ofdev->name = dev_name(&ofdev->dev);
ofdev->id = -1;
- /* device_add will assume that this device is on the same node as
- * the parent. If there is no parent defined, set the node
- * explicitly */
- if (!ofdev->dev.parent)
- set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
+ /*
+ * If this device has not binding numa node in devicetree, that is
+ * of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
+ * device is on the same node as the parent.
+ */
+ set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
return device_add(&ofdev->dev);
}
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 6e82bc423..655f79db7 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/initrd.h>
#include <linux/memblock.h>
+#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_reserved_mem.h>
@@ -184,7 +185,7 @@ static void * unflatten_dt_node(const void *blob,
struct property *pp, **prev_pp = NULL;
const char *pathp;
unsigned int l, allocl;
- static int depth = 0;
+ static int depth;
int old_depth;
int offset;
int has_name = 0;
@@ -436,6 +437,8 @@ static void *kernel_tree_alloc(u64 size, u64 align)
return kzalloc(size, GFP_KERNEL);
}
+static DEFINE_MUTEX(of_fdt_unflatten_mutex);
+
/**
* of_fdt_unflatten_tree - create tree of device_nodes from flat blob
*
@@ -447,7 +450,9 @@ static void *kernel_tree_alloc(u64 size, u64 align)
void of_fdt_unflatten_tree(const unsigned long *blob,
struct device_node **mynodes)
{
+ mutex_lock(&of_fdt_unflatten_mutex);
__unflatten_device_tree(blob, mynodes, &kernel_tree_alloc);
+ mutex_unlock(&of_fdt_unflatten_mutex);
}
EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree);
@@ -813,20 +818,24 @@ static int __init early_init_dt_scan_chosen_serial(void)
if (!p || !l)
return -ENOENT;
+ /* Remove console options if present */
+ l = strchrnul(p, ':') - p;
+
/* Get the node specified by stdout-path */
- offset = fdt_path_offset(fdt, p);
+ offset = fdt_path_offset_namelen(fdt, p, l);
if (offset < 0)
return -ENODEV;
while (match->compatible[0]) {
- unsigned long addr;
+ u64 addr;
+
if (fdt_node_check_compatible(fdt, offset, match->compatible)) {
match++;
continue;
}
addr = fdt_translate_address(fdt, offset);
- if (!addr)
+ if (addr == OF_BAD_ADDR)
return -ENXIO;
of_setup_earlycon(addr, match->data);
@@ -1037,7 +1046,7 @@ void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
phys_addr_t size, bool nomap)
{
- pr_err("Reserved memory not supported, ignoring range 0x%pa - 0x%pa%s\n",
+ pr_err("Reserved memory not supported, ignoring range %pa - %pa%s\n",
&base, &size, nomap ? " (nomap)" : "");
return -ENOSYS;
}
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 55317fa9c..4fa916dff 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -77,6 +77,7 @@ struct device_node *of_irq_find_parent(struct device_node *child)
return p;
}
+EXPORT_SYMBOL_GPL(of_irq_find_parent);
/**
* of_irq_parse_raw - Low level interrupt tree parsing
@@ -501,10 +502,12 @@ void __init of_irq_init(const struct of_device_id *matches)
* pointer, interrupt-parent device_node etc.
*/
desc = kzalloc(sizeof(*desc), GFP_KERNEL);
- if (WARN_ON(!desc))
+ if (WARN_ON(!desc)) {
+ of_node_put(np);
goto err;
+ }
- desc->dev = np;
+ desc->dev = of_node_get(np);
desc->interrupt_parent = of_irq_find_parent(np);
if (desc->interrupt_parent == np)
desc->interrupt_parent = NULL;
@@ -575,26 +578,192 @@ void __init of_irq_init(const struct of_device_id *matches)
err:
list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) {
list_del(&desc->list);
+ of_node_put(desc->dev);
kfree(desc);
}
}
+static u32 __of_msi_map_rid(struct device *dev, struct device_node **np,
+ u32 rid_in)
+{
+ struct device *parent_dev;
+ struct device_node *msi_controller_node;
+ struct device_node *msi_np = *np;
+ u32 map_mask, masked_rid, rid_base, msi_base, rid_len, phandle;
+ int msi_map_len;
+ bool matched;
+ u32 rid_out = rid_in;
+ const __be32 *msi_map = NULL;
+
+ /*
+ * Walk up the device parent links looking for one with a
+ * "msi-map" property.
+ */
+ for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) {
+ if (!parent_dev->of_node)
+ continue;
+
+ msi_map = of_get_property(parent_dev->of_node,
+ "msi-map", &msi_map_len);
+ if (!msi_map)
+ continue;
+
+ if (msi_map_len % (4 * sizeof(__be32))) {
+ dev_err(parent_dev, "Error: Bad msi-map length: %d\n",
+ msi_map_len);
+ return rid_out;
+ }
+ /* We have a good parent_dev and msi_map, let's use them. */
+ break;
+ }
+ if (!msi_map)
+ return rid_out;
+
+ /* The default is to select all bits. */
+ map_mask = 0xffffffff;
+
+ /*
+ * Can be overridden by "msi-map-mask" property. If
+ * of_property_read_u32() fails, the default is used.
+ */
+ of_property_read_u32(parent_dev->of_node, "msi-map-mask", &map_mask);
+
+ masked_rid = map_mask & rid_in;
+ matched = false;
+ while (!matched && msi_map_len >= 4 * sizeof(__be32)) {
+ rid_base = be32_to_cpup(msi_map + 0);
+ phandle = be32_to_cpup(msi_map + 1);
+ msi_base = be32_to_cpup(msi_map + 2);
+ rid_len = be32_to_cpup(msi_map + 3);
+
+ msi_controller_node = of_find_node_by_phandle(phandle);
+
+ matched = (masked_rid >= rid_base &&
+ masked_rid < rid_base + rid_len);
+ if (msi_np)
+ matched &= msi_np == msi_controller_node;
+
+ if (matched && !msi_np) {
+ *np = msi_np = msi_controller_node;
+ break;
+ }
+
+ of_node_put(msi_controller_node);
+ msi_map_len -= 4 * sizeof(__be32);
+ msi_map += 4;
+ }
+ if (!matched)
+ return rid_out;
+
+ rid_out = masked_rid + msi_base;
+ dev_dbg(dev,
+ "msi-map at: %s, using mask %08x, rid-base: %08x, msi-base: %08x, length: %08x, rid: %08x -> %08x\n",
+ dev_name(parent_dev), map_mask, rid_base, msi_base,
+ rid_len, rid_in, rid_out);
+
+ return rid_out;
+}
+
/**
- * of_msi_configure - Set the msi_domain field of a device
- * @dev: device structure to associate with an MSI irq domain
- * @np: device node for that device
+ * of_msi_map_rid - Map a MSI requester ID for a device.
+ * @dev: device for which the mapping is to be done.
+ * @msi_np: device node of the expected msi controller.
+ * @rid_in: unmapped MSI requester ID for the device.
+ *
+ * Walk up the device hierarchy looking for devices with a "msi-map"
+ * property. If found, apply the mapping to @rid_in.
+ *
+ * Returns the mapped MSI requester ID.
*/
-void of_msi_configure(struct device *dev, struct device_node *np)
+u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in)
+{
+ return __of_msi_map_rid(dev, &msi_np, rid_in);
+}
+
+static struct irq_domain *__of_get_msi_domain(struct device_node *np,
+ enum irq_domain_bus_token token)
+{
+ struct irq_domain *d;
+
+ d = irq_find_matching_host(np, token);
+ if (!d)
+ d = irq_find_host(np);
+
+ return d;
+}
+
+/**
+ * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain
+ * @dev: device for which the mapping is to be done.
+ * @rid: Requester ID for the device.
+ *
+ * Walk up the device hierarchy looking for devices with a "msi-map"
+ * property.
+ *
+ * Returns: the MSI domain for this device (or NULL on failure)
+ */
+struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 rid)
+{
+ struct device_node *np = NULL;
+
+ __of_msi_map_rid(dev, &np, rid);
+ return __of_get_msi_domain(np, DOMAIN_BUS_PCI_MSI);
+}
+
+/**
+ * of_msi_get_domain - Use msi-parent to find the relevant MSI domain
+ * @dev: device for which the domain is requested
+ * @np: device node for @dev
+ * @token: bus type for this domain
+ *
+ * Parse the msi-parent property (both the simple and the complex
+ * versions), and returns the corresponding MSI domain.
+ *
+ * Returns: the MSI domain for this device (or NULL on failure).
+ */
+struct irq_domain *of_msi_get_domain(struct device *dev,
+ struct device_node *np,
+ enum irq_domain_bus_token token)
{
struct device_node *msi_np;
struct irq_domain *d;
+ /* Check for a single msi-parent property */
msi_np = of_parse_phandle(np, "msi-parent", 0);
- if (!msi_np)
- return;
+ if (msi_np && !of_property_read_bool(msi_np, "#msi-cells")) {
+ d = __of_get_msi_domain(msi_np, token);
+ if (!d)
+ of_node_put(msi_np);
+ return d;
+ }
- d = irq_find_matching_host(msi_np, DOMAIN_BUS_PLATFORM_MSI);
- if (!d)
- d = irq_find_host(msi_np);
- dev_set_msi_domain(dev, d);
+ if (token == DOMAIN_BUS_PLATFORM_MSI) {
+ /* Check for the complex msi-parent version */
+ struct of_phandle_args args;
+ int index = 0;
+
+ while (!of_parse_phandle_with_args(np, "msi-parent",
+ "#msi-cells",
+ index, &args)) {
+ d = __of_get_msi_domain(args.np, token);
+ if (d)
+ return d;
+
+ of_node_put(args.np);
+ index++;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * of_msi_configure - Set the msi_domain field of a device
+ * @dev: device structure to associate with an MSI irq domain
+ * @np: device node for that device
+ */
+void of_msi_configure(struct device *dev, struct device_node *np)
+{
+ dev_set_msi_domain(dev,
+ of_msi_get_domain(dev, np, DOMAIN_BUS_PLATFORM_MSI));
}
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 5751dc5b6..b1449f716 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -5,6 +5,7 @@
#include <linux/of_device.h>
#include <linux/of_pci.h>
#include <linux/slab.h>
+#include <asm-generic/pci-bridge.h>
static inline int __of_pci_pci_compare(struct device_node *node,
unsigned int data)
@@ -118,24 +119,29 @@ int of_get_pci_domain_nr(struct device_node *node)
EXPORT_SYMBOL_GPL(of_get_pci_domain_nr);
/**
- * of_pci_dma_configure - Setup DMA configuration
- * @dev: ptr to pci_dev struct of the PCI device
- *
- * Function to update PCI devices's DMA configuration using the same
- * info from the OF node of host bridge's parent (if any).
+ * of_pci_check_probe_only - Setup probe only mode if linux,pci-probe-only
+ * is present and valid
*/
-void of_pci_dma_configure(struct pci_dev *pci_dev)
+void of_pci_check_probe_only(void)
{
- struct device *dev = &pci_dev->dev;
- struct device *bridge = pci_get_host_bridge_device(pci_dev);
+ u32 val;
+ int ret;
- if (!bridge->parent)
+ ret = of_property_read_u32(of_chosen, "linux,pci-probe-only", &val);
+ if (ret) {
+ if (ret == -ENODATA || ret == -EOVERFLOW)
+ pr_warn("linux,pci-probe-only without valid value, ignoring\n");
return;
+ }
+
+ if (val)
+ pci_add_flags(PCI_PROBE_ONLY);
+ else
+ pci_clear_flags(PCI_PROBE_ONLY);
- of_dma_configure(dev, bridge->parent->of_node);
- pci_put_host_bridge_device(bridge);
+ pr_info("PCI: PROBE_ONLY %sabled\n", val ? "en" : "dis");
}
-EXPORT_SYMBOL_GPL(of_pci_dma_configure);
+EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
#if defined(CONFIG_OF_ADDRESS)
/**
@@ -223,8 +229,10 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
}
err = of_pci_range_to_resource(&range, dev, res);
- if (err)
- goto conversion_failed;
+ if (err) {
+ kfree(res);
+ continue;
+ }
if (resource_type(res) == IORESOURCE_IO) {
if (!io_base) {
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 726ebe792..1a3556a9e 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -1,7 +1,7 @@
/*
* Device tree based initialization code for reserved memory.
*
- * Copyright (c) 2013, The Linux Foundation. All Rights Reserved.
+ * Copyright (c) 2013, 2015 The Linux Foundation. All Rights Reserved.
* Copyright (c) 2013,2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* Author: Marek Szyprowski <m.szyprowski@samsung.com>
@@ -20,6 +20,7 @@
#include <linux/mm.h>
#include <linux/sizes.h>
#include <linux/of_reserved_mem.h>
+#include <linux/sort.h>
#define MAX_RESERVED_REGIONS 16
static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
@@ -123,6 +124,10 @@ static int __init __reserved_mem_alloc_size(unsigned long node,
align = dt_mem_next_cell(dt_root_addr_cells, &prop);
}
+ /* Need adjust the alignment to satisfy the CMA requirement */
+ if (IS_ENABLED(CONFIG_CMA) && of_flat_dt_is_compatible(node, "shared-dma-pool"))
+ align = max(align, (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order));
+
prop = of_get_flat_dt_prop(node, "alloc-ranges", &len);
if (prop) {
@@ -197,12 +202,57 @@ static int __init __reserved_mem_init_node(struct reserved_mem *rmem)
return -ENOENT;
}
+static int __init __rmem_cmp(const void *a, const void *b)
+{
+ const struct reserved_mem *ra = a, *rb = b;
+
+ if (ra->base < rb->base)
+ return -1;
+
+ if (ra->base > rb->base)
+ return 1;
+
+ return 0;
+}
+
+static void __init __rmem_check_for_overlap(void)
+{
+ int i;
+
+ if (reserved_mem_count < 2)
+ return;
+
+ sort(reserved_mem, reserved_mem_count, sizeof(reserved_mem[0]),
+ __rmem_cmp, NULL);
+ for (i = 0; i < reserved_mem_count - 1; i++) {
+ struct reserved_mem *this, *next;
+
+ this = &reserved_mem[i];
+ next = &reserved_mem[i + 1];
+ if (!(this->base && next->base))
+ continue;
+ if (this->base + this->size > next->base) {
+ phys_addr_t this_end, next_end;
+
+ this_end = this->base + this->size;
+ next_end = next->base + next->size;
+ pr_err("Reserved memory: OVERLAP DETECTED!\n%s (%pa--%pa) overlaps with %s (%pa--%pa)\n",
+ this->name, &this->base, &this_end,
+ next->name, &next->base, &next_end);
+ }
+ }
+}
+
/**
* fdt_init_reserved_mem - allocate and init all saved reserved memory regions
*/
void __init fdt_init_reserved_mem(void)
{
int i;
+
+ /* check for overlapping reserved regions */
+ __rmem_check_for_overlap();
+
for (i = 0; i < reserved_mem_count; i++) {
struct reserved_mem *rmem = &reserved_mem[i];
unsigned long node = rmem->fdt_node;
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 24e025f79..54e5af9d7 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -149,6 +149,7 @@ static int of_overlay_apply_one(struct of_overlay *ov,
pr_err("%s: Failed to apply single node @%s/%s\n",
__func__, target->full_name,
child->name);
+ of_node_put(child);
return ret;
}
}
@@ -417,8 +418,10 @@ static int overlay_subtree_check(struct device_node *tree,
return 1;
for_each_child_of_node(tree, child) {
- if (overlay_subtree_check(child, dn))
+ if (overlay_subtree_check(child, dn)) {
+ of_node_put(child);
return 1;
+ }
}
return 0;
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 1001efaed..af9834361 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -405,8 +405,10 @@ int of_platform_bus_probe(struct device_node *root,
if (!of_match_node(matches, child))
continue;
rc = of_platform_bus_create(child, matches, NULL, parent, false);
- if (rc)
+ if (rc) {
+ of_node_put(child);
break;
+ }
}
of_node_put(root);
@@ -447,8 +449,10 @@ int of_platform_populate(struct device_node *root,
for_each_child_of_node(root, child) {
rc = of_platform_bus_create(child, matches, lookup, parent, true);
- if (rc)
+ if (rc) {
+ of_node_put(child);
break;
+ }
}
of_node_set_flag(root, OF_POPULATED_BUS);
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 9f71770b6..e16ea5717 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -205,16 +205,20 @@ static int __init of_unittest_check_node_linkage(struct device_node *np)
if (child->parent != np) {
pr_err("Child node %s links to wrong parent %s\n",
child->name, np->name);
- return -EINVAL;
+ rc = -EINVAL;
+ goto put_child;
}
rc = of_unittest_check_node_linkage(child);
if (rc < 0)
- return rc;
+ goto put_child;
count += rc;
}
return count + 1;
+put_child:
+ of_node_put(child);
+ return rc;
}
static void __init of_unittest_check_tree_linkage(void)