PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl

The cxl driver will use infrastructure from pnv_php to handle device tree
updates when switching bi-modal CAPI cards into CAPI mode.

To enable this, export pnv_php_find_slot() and
pnv_php_set_slot_power_state(), and add corresponding declarations, as well
as the definition of struct pnv_php_slot, to asm/pnv-pci.h.

Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>
Cc: linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 33 insertions, 27 deletions

diff --git a/arch/powerpc/include/asm/pnv-pci.h b/arch/powerpc/include/asm/pnv-pci.h
index c47097f7f6ab..0cbd8134ce81 100644
--- a/arch/powerpc/include/asm/pnv-pci.h
+++ b/arch/powerpc/include/asm/pnv-pci.h
@@ -11,6 +11,7 @@
 #define _ASM_PNV_PCI_H
 
 #include <linux/pci.h>
+#include <linux/pci_hotplug.h>
 #include <misc/cxl-base.h>
 #include <asm/opal-api.h>
 
@@ -47,4 +48,31 @@ void pnv_cxl_phb_set_peer_afu(struct pci_dev *dev, struct cxl_afu *afu);
 
 #endif
 
+struct pnv_php_slot {
+        struct hotplug_slot             slot;
+        struct hotplug_slot_info        slot_info;
+        uint64_t                        id;
+        char                            *name;
+        int                             slot_no;
+        struct kref                     kref;
+#define PNV_PHP_STATE_INITIALIZED       0
+#define PNV_PHP_STATE_REGISTERED        1
+#define PNV_PHP_STATE_POPULATED         2
+#define PNV_PHP_STATE_OFFLINE           3
+        int                             state;
+        struct device_node              *dn;
+        struct pci_dev                  *pdev;
+        struct pci_bus                  *bus;
+        bool                            power_state_check;
+        void                            *fdt;
+        void                            *dt;
+        struct of_changeset             ocs;
+        struct pnv_php_slot             *parent;
+        struct list_head                children;
+        struct list_head                link;
+};
+extern struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn);
+extern int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
+                                        uint8_t state);
+
 #endif
diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index 6086db6c0a48..2d2f704e1e97 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -22,30 +22,6 @@
 #define DRIVER_AUTHOR   "Gavin Shan, IBM Corporation"
 #define DRIVER_DESC     "PowerPC PowerNV PCI Hotplug Driver"
 
-struct pnv_php_slot {
-        struct hotplug_slot             slot;
-        struct hotplug_slot_info        slot_info;
-        uint64_t                        id;
-        char                            *name;
-        int                             slot_no;
-        struct kref                     kref;
-#define PNV_PHP_STATE_INITIALIZED       0
-#define PNV_PHP_STATE_REGISTERED        1
-#define PNV_PHP_STATE_POPULATED         2
-#define PNV_PHP_STATE_OFFLINE           3
-        int                             state;
-        struct device_node              *dn;
-        struct pci_dev                  *pdev;
-        struct pci_bus                  *bus;
-        bool                            power_state_check;
-        void                            *fdt;
-        void                            *dt;
-        struct of_changeset             ocs;
-        struct pnv_php_slot             *parent;
-        struct list_head                children;
-        struct list_head                link;
-};
-
 static LIST_HEAD(pnv_php_slot_list);
 static DEFINE_SPINLOCK(pnv_php_lock);
 
@@ -91,7 +67,7 @@ static struct pnv_php_slot *pnv_php_match(struct device_node *dn,
         return NULL;
 }
 
-static struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn)
+struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn)
 {
         struct pnv_php_slot *php_slot, *tmp;
         unsigned long flags;
@@ -108,6 +84,7 @@ static struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn)
 
         return NULL;
 }
+EXPORT_SYMBOL_GPL(pnv_php_find_slot);
 
 /*
  * Remove pdn for all children of the indicated device node.
@@ -316,8 +293,8 @@ out:
         return ret;
 }
 
-static int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
-                                        uint8_t state)
+int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
+                                 uint8_t state)
 {
         struct pnv_php_slot *php_slot = slot->private;
         struct opal_msg msg;
@@ -347,6 +324,7 @@ static int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
 
         return ret;
 }
+EXPORT_SYMBOL_GPL(pnv_php_set_slot_power_state);
 
 static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state)
 {