On 10.05.2016 20:20, Rafael J. Wysocki wrote:
On Tue, May 10, 2016 at 5:19 PM, Tomasz Nowicki <tn@xxxxxxxxxxxx> wrote:
Platforms that have memory mapped IO port (such as ARM64) need special
handling for PCI I/O resources. For host bridge's resource probing case
these resources need to be fixed up with pci_register_io_range/pci_remap_iospace etc.
The same I/O resources need to be released after hotplug
removal so that it can be re-added back by the pci_remap_iospace
function during insertion. As a consequence we unmap I/O resources
with pci_unmap_iospace when we release host bridge resources.
Signed-off-by: Jayachandran C <jchandra@xxxxxxxxxxxx>
Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
---
drivers/acpi/pci_root.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index ae3fe4e..cb3071d 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -719,6 +719,34 @@ next:
resource_list_add_tail(entry, resources);
}
}
+static void acpi_pci_root_remap_iospace(struct resource_entry *entry)
+{
+#ifdef PCI_IOBASE
Same comment about the #ifdefs as in the other patch.
OK
+ struct resource *res = entry->res;
+ resource_size_t cpu_addr = res->start;
+ resource_size_t pci_addr = cpu_addr - entry->offset;
+ resource_size_t length = resource_size(res);
+ unsigned long port;
+
+ if (pci_register_io_range(cpu_addr, length))
+ goto err;
+
+ port = pci_address_to_pio(cpu_addr);
+ if (port == (unsigned long)-1)
+ goto err;
+
+ res->start = port;
+ res->end = port + length - 1;
+ entry->offset = port - pci_addr;
+
+ if (pci_remap_iospace(res, cpu_addr) < 0)
+ goto err;
An empty line here?
yes, empty line would be nice here.
Tomasz
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