X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fpci%2Fhotplug%2Fpciehprm_acpi.c;h=424e7ac61746622196f50a79ff8d460624bb71d3;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=b127575ec98516029298fbc817acc7421f6d6fde;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git

diff --git a/drivers/pci/hotplug/pciehprm_acpi.c b/drivers/pci/hotplug/pciehprm_acpi.c
index b127575ec..424e7ac61 100644
--- a/drivers/pci/hotplug/pciehprm_acpi.c
+++ b/drivers/pci/hotplug/pciehprm_acpi.c
@@ -32,6 +32,7 @@
 #include <linux/init.h>
 #include <linux/acpi.h>
 #include <linux/efi.h>
+#include <linux/pci-acpi.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #ifdef	CONFIG_IA64
@@ -50,6 +51,14 @@
 #define	METHOD_NAME__HPP	"_HPP"
 #define	METHOD_NAME_OSHP	"OSHP"
 
+/* Status code for running acpi method to gain native control */
+#define NC_NOT_RUN	0
+#define OSC_NOT_EXIST	1
+#define OSC_RUN_FAILED	2
+#define OSHP_NOT_EXIST	3
+#define OSHP_RUN_FAILED	4
+#define NC_RUN_SUCCESS	5
+
 #define	PHP_RES_BUS		0xA0
 #define	PHP_RES_IO		0xA1
 #define	PHP_RES_MEM		0xA2
@@ -125,7 +134,9 @@ static u8 * acpi_path_name( acpi_handle	handle)
 }
 
 static void acpi_get__hpp ( struct acpi_bridge	*ab);
-static void acpi_run_oshp ( struct acpi_bridge	*ab);
+static int acpi_run_oshp ( struct acpi_bridge	*ab);
+static int osc_run_status = NC_NOT_RUN;
+static int oshp_run_status = NC_NOT_RUN;
 
 static int acpi_add_slot_to_php_slots(
 	struct acpi_bridge	*ab,
@@ -158,8 +169,9 @@ static int acpi_add_slot_to_php_slots(
 	ab->scanned += 1;
 	if (!ab->_hpp)
 		acpi_get__hpp(ab);
-
-	acpi_run_oshp(ab);
+	
+	if (osc_run_status == OSC_NOT_EXIST)
+		oshp_run_status = acpi_run_oshp(ab);
 
 	if (sun != samesun) {
 		info("acpi_pciehprm:   Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", 
@@ -238,7 +250,7 @@ free_and_return:
 	kfree(ret_buf.pointer);
 }
 
-static void acpi_run_oshp ( struct acpi_bridge	*ab)
+static int acpi_run_oshp ( struct acpi_bridge	*ab)
 {
 	acpi_status		status;
 	u8			*path_name = acpi_path_name(ab->handle);
@@ -248,9 +260,13 @@ static void acpi_run_oshp ( struct acpi_bridge	*ab)
 	status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, &ret_buf);
 	if (ACPI_FAILURE(status)) {
 		err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
-	} else
+		oshp_run_status = (status == AE_NOT_FOUND) ? OSHP_NOT_EXIST : OSHP_RUN_FAILED;
+	} else {
+		oshp_run_status = NC_RUN_SUCCESS;
 		dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
-	return;
+		dbg("acpi_pciehprm:%s oshp_run_status =0x%x\n", path_name, oshp_run_status);
+	}
+	return oshp_run_status;
 }
 
 static acpi_status acpi_evaluate_crs(
@@ -1056,6 +1072,16 @@ static struct acpi_bridge * add_host_bridge(
 		kfree(ab);
 		return NULL;
 	}
+
+	status = pci_osc_control_set (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL); 
+	if (ACPI_FAILURE(status)) {
+		err("%s: status %x\n", __FUNCTION__, status);
+		osc_run_status = (status == AE_NOT_FOUND) ? OSC_NOT_EXIST : OSC_RUN_FAILED;
+	} else {
+		osc_run_status = NC_RUN_SUCCESS;
+	}	
+	dbg("%s: osc_run_status %x\n", __FUNCTION__, osc_run_status);
+	
 	build_a_bridge(ab, ab);
 
 	return ab;
@@ -1141,6 +1167,11 @@ int pciehprm_init(enum php_ctlr_type ctlr_type)
 	if (rc)
 		return rc;
 
+	if ((oshp_run_status != NC_RUN_SUCCESS) && (osc_run_status != NC_RUN_SUCCESS)) {
+		err("Fails to gain control of native hot-plug\n");
+		rc = -ENODEV;
+	}
+
 	dbg("pciehprm ACPI init %s\n", (rc)?"fail":"success");
 	return rc;
 }