[PATCH] PCI Hotplug: add common acpi functions to core
shpchprm_acpi.c and pciehprm_acpi.c are nearly identical. In addition,
there are functions in both these files that are also in acpiphp_glue.c.
This patch will remove duplicate functions from shpchp, pciehp, and
acpiphp and move this functionality to pci_hotplug, as it is not
hardware specific. Get rid of shpchprm* and pciehprm* files since they
are no longer needed. shpchprm_nonacpi.c and pciehprm_nonacpi.c are
identical, as well as shpchprm_legacy.c and can be replaced with a
macro.
This patch also changes acpiphp to use the common hpp code.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 2427b08..22dcd12 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -38,7 +38,10 @@
#include "../pci.h"
#include "pciehp.h"
-
+#include <acpi/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/actypes.h>
+#include <linux/pci-acpi.h>
#ifdef DEBUG
#define DBG_K_TRACE_ENTRY ((unsigned int)0x00000001) /* On function entry */
#define DBG_K_TRACE_EXIT ((unsigned int)0x00000002) /* On function exit */
@@ -1236,6 +1239,75 @@
.check_lnk_status = hpc_check_lnk_status,
};
+#ifdef CONFIG_ACPI
+int pciehp_acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev)
+{
+ acpi_status status;
+ acpi_handle chandle, handle = DEVICE_ACPI_HANDLE(&(dev->dev));
+ struct pci_dev *pdev = dev;
+ struct pci_bus *parent;
+ u8 *path_name = NULL;
+
+ /*
+ * Per PCI firmware specification, we should run the ACPI _OSC
+ * method to get control of hotplug hardware before using it.
+ * If an _OSC is missing, we look for an OSHP to do the same thing.
+ * To handle different BIOS behavior, we look for _OSC and OSHP
+ * within the scope of the hotplug controller and its parents, upto
+ * the host bridge under which this controller exists.
+ */
+ while (!handle) {
+ /*
+ * This hotplug controller was not listed in the ACPI name
+ * space at all. Try to get acpi handle of parent pci bus.
+ */
+ if (!pdev || !pdev->bus->parent)
+ break;
+ parent = pdev->bus->parent;
+ dbg("Could not find %s in acpi namespace, trying parent\n",
+ pci_name(pdev));
+ if (!parent->self)
+ /* Parent must be a host bridge */
+ handle = acpi_get_pci_rootbridge_handle(
+ pci_domain_nr(parent),
+ parent->number);
+ else
+ handle = DEVICE_ACPI_HANDLE(
+ &(parent->self->dev));
+ pdev = parent->self;
+ }
+
+ while (handle) {
+ path_name = acpi_path_name(handle);
+ dbg("Trying to get hotplug control for %s \n", path_name);
+ status = pci_osc_control_set(handle,
+ OSC_PCI_EXPRESS_NATIVE_HP_CONTROL);
+ if (status == AE_NOT_FOUND)
+ status = acpi_run_oshp(handle);
+ if (ACPI_SUCCESS(status)) {
+ dbg("Gained control for hotplug HW for pci %s (%s)\n",
+ pci_name(dev), path_name);
+ acpi_os_free(path_name);
+ return 0;
+ }
+ if (acpi_root_bridge(handle))
+ break;
+ chandle = handle;
+ status = acpi_get_parent(chandle, &handle);
+ if (ACPI_FAILURE(status))
+ break;
+ }
+
+ err("Cannot get control of hotplug hardware for pci %s\n",
+ pci_name(dev));
+ if (path_name)
+ acpi_os_free(path_name);
+ return -1;
+}
+#endif
+
+
+
int pcie_init(struct controller * ctrl, struct pcie_device *dev)
{
struct php_ctlr_state_s *php_ctlr, *p;