In preparation for subsequent changes in reset function lookup,
lets introduce a dynamic list of reset combos (compat string,
reset module, reset function). The list can be populated/voided with
two new functions, vfio_platform_register/unregister_reset. Those are
not yet used in this patch.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
drivers/vfio/platform/vfio_platform_common.c | 55 +++++++++++++++++++++++++++
drivers/vfio/platform/vfio_platform_private.h | 14 +++++++
2 files changed, 69 insertions(+)
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index e43efb5..d36afc9 100644
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -23,6 +23,8 @@
#include "vfio_platform_private.h"
+struct list_head reset_list;
+LIST_HEAD(reset_list);
static DEFINE_MUTEX(driver_lock);
static const struct vfio_platform_reset_combo reset_lookup_table[] = {
@@ -573,3 +575,56 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev)
return vdev;
}
EXPORT_SYMBOL_GPL(vfio_platform_remove_common);
+
+int vfio_platform_register_reset(struct module *reset_owner, char *compat,
+ vfio_platform_reset_fn_t reset)
+{
+ struct vfio_platform_reset_node *node, *iter;
+ bool found = false;
+
+ list_for_each_entry(iter, &reset_list, link) {
+ if (!strcmp(iter->compat, compat)) {
+ found = true;
+ break;
+ }
+ }
+ if (found)
+ return -EINVAL;
+
+ node = kmalloc(sizeof(*node), GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+
+ node->compat = kstrdup(compat, GFP_KERNEL);
+ if (!node->compat)
+ return -ENOMEM;
+
+ node->owner = reset_owner;
+ node->reset = reset;
+
+ list_add(&node->link, &reset_list);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(vfio_platform_register_reset);
+
+int vfio_platform_unregister_reset(char *compat)
+{
+ struct vfio_platform_reset_node *iter;
+ bool found = false;
+
+ list_for_each_entry(iter, &reset_list, link) {
+ if (!strcmp(iter->compat, compat)) {
+ found = true;
+ break;
+ }
+ }
+ if (!found)
+ return -EINVAL;
+
+ list_del(&iter->link);
+ kfree(iter->compat);
+ kfree(iter);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(vfio_platform_unregister_reset);
+
diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h
index 1c9b3d5..17323f0 100644
--- a/drivers/vfio/platform/vfio_platform_private.h
+++ b/drivers/vfio/platform/vfio_platform_private.h
@@ -76,6 +76,15 @@ struct vfio_platform_reset_combo {
const char *module_name;
};
+typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev);
+
+struct vfio_platform_reset_node {
+ struct list_head link;
+ char *compat;
+ struct module *owner;
+ vfio_platform_reset_fn_t reset;
+};
+
extern int vfio_platform_probe_common(struct vfio_platform_device *vdev,
struct device *dev);
extern struct vfio_platform_device *vfio_platform_remove_common
@@ -89,4 +98,9 @@ extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev,
unsigned start, unsigned count,
void *data);
+extern int vfio_platform_register_reset(struct module *owner,
+ char *compat,
+ vfio_platform_reset_fn_t reset);
+extern int vfio_platform_unregister_reset(char *compat);
+
#endif /* VFIO_PLATFORM_PRIVATE_H */
--
1.9.1
--
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