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path: root/drivers/pci/of.c
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Diffstat (limited to 'drivers/pci/of.c')
-rw-r--r--drivers/pci/of.c67
1 files changed, 56 insertions, 11 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 36891e7deee3..81ceeaa6f1d5 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -236,7 +236,6 @@ void of_pci_check_probe_only(void)
}
EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
-#if defined(CONFIG_OF_ADDRESS)
/**
* devm_of_pci_get_host_bridge_resources() - Resource-managed parsing of PCI
* host bridge resources from DT
@@ -255,16 +254,18 @@ EXPORT_SYMBOL_GPL(of_pci_check_probe_only);
* It returns zero if the range parsing has been successful or a standard error
* value if it failed.
*/
-int devm_of_pci_get_host_bridge_resources(struct device *dev,
+static int devm_of_pci_get_host_bridge_resources(struct device *dev,
unsigned char busno, unsigned char bus_max,
- struct list_head *resources, resource_size_t *io_base)
+ struct list_head *resources,
+ struct list_head *ib_resources,
+ resource_size_t *io_base)
{
struct device_node *dev_node = dev->of_node;
struct resource *res, tmp_res;
struct resource *bus_range;
struct of_pci_range range;
struct of_pci_range_parser parser;
- char range_type[4];
+ const char *range_type;
int err;
if (io_base)
@@ -298,12 +299,12 @@ int devm_of_pci_get_host_bridge_resources(struct device *dev,
for_each_of_pci_range(&parser, &range) {
/* Read next ranges element */
if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_IO)
- snprintf(range_type, 4, " IO");
+ range_type = "IO";
else if ((range.flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM)
- snprintf(range_type, 4, "MEM");
+ range_type = "MEM";
else
- snprintf(range_type, 4, "err");
- dev_info(dev, " %s %#010llx..%#010llx -> %#010llx\n",
+ range_type = "err";
+ dev_info(dev, " %6s %#012llx..%#012llx -> %#012llx\n",
range_type, range.cpu_addr,
range.cpu_addr + range.size - 1, range.pci_addr);
@@ -340,14 +341,54 @@ int devm_of_pci_get_host_bridge_resources(struct device *dev,
pci_add_resource_offset(resources, res, res->start - range.pci_addr);
}
+ /* Check for dma-ranges property */
+ if (!ib_resources)
+ return 0;
+ err = of_pci_dma_range_parser_init(&parser, dev_node);
+ if (err)
+ return 0;
+
+ dev_dbg(dev, "Parsing dma-ranges property...\n");
+ for_each_of_pci_range(&parser, &range) {
+ struct resource_entry *entry;
+ /*
+ * If we failed translation or got a zero-sized region
+ * then skip this range
+ */
+ if (((range.flags & IORESOURCE_TYPE_BITS) != IORESOURCE_MEM) ||
+ range.cpu_addr == OF_BAD_ADDR || range.size == 0)
+ continue;
+
+ dev_info(dev, " %6s %#012llx..%#012llx -> %#012llx\n",
+ "IB MEM", range.cpu_addr,
+ range.cpu_addr + range.size - 1, range.pci_addr);
+
+
+ err = of_pci_range_to_resource(&range, dev_node, &tmp_res);
+ if (err)
+ continue;
+
+ res = devm_kmemdup(dev, &tmp_res, sizeof(tmp_res), GFP_KERNEL);
+ if (!res) {
+ err = -ENOMEM;
+ goto failed;
+ }
+
+ /* Keep the resource list sorted */
+ resource_list_for_each_entry(entry, ib_resources)
+ if (entry->res->start > res->start)
+ break;
+
+ pci_add_resource_offset(&entry->node, res,
+ res->start - range.pci_addr);
+ }
+
return 0;
failed:
pci_free_resource_list(resources);
return err;
}
-EXPORT_SYMBOL_GPL(devm_of_pci_get_host_bridge_resources);
-#endif /* CONFIG_OF_ADDRESS */
#if IS_ENABLED(CONFIG_OF_IRQ)
/**
@@ -482,6 +523,7 @@ EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);
int pci_parse_request_of_pci_ranges(struct device *dev,
struct list_head *resources,
+ struct list_head *ib_resources,
struct resource **bus_range)
{
int err, res_valid = 0;
@@ -489,8 +531,10 @@ int pci_parse_request_of_pci_ranges(struct device *dev,
struct resource_entry *win, *tmp;
INIT_LIST_HEAD(resources);
+ if (ib_resources)
+ INIT_LIST_HEAD(ib_resources);
err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, resources,
- &iobase);
+ ib_resources, &iobase);
if (err)
return err;
@@ -530,6 +574,7 @@ int pci_parse_request_of_pci_ranges(struct device *dev,
pci_free_resource_list(resources);
return err;
}
+EXPORT_SYMBOL_GPL(pci_parse_request_of_pci_ranges);
#endif /* CONFIG_PCI */