vfio_platform_common now stores a lists of available reset functions. Two functions are exposed to register/unregister a reset function. A reset function is paired with a compat string.
Signed-off-by: Eric Auger <[email protected]> --- drivers/vfio/platform/vfio_platform_common.c | 63 +++++++++++++++++++++++++++ drivers/vfio/platform/vfio_platform_private.h | 13 ++++++ 2 files changed, 76 insertions(+) diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c index abcff7a..edbf24c 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -23,6 +23,9 @@ #include "vfio_platform_private.h" +struct list_head reset_list; +LIST_HEAD(reset_list); + static DEFINE_MUTEX(driver_lock); static int vfio_platform_regions_init(struct vfio_platform_device *vdev) @@ -511,6 +514,13 @@ EXPORT_SYMBOL_GPL(vfio_platform_probe_common); struct vfio_platform_device *vfio_platform_remove_common(struct device *dev) { struct vfio_platform_device *vdev; + struct vfio_platform_reset_node *iter, *tmp; + + list_for_each_entry_safe(iter, tmp, &reset_list, link) { + list_del(&iter->link); + kfree(iter->compat); + kfree(iter); + } vdev = vfio_del_group_dev(dev); if (vdev) @@ -519,3 +529,56 @@ 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(char *compat, struct module *reset_owner, + 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 5d31e04..da2d60b 100644 --- a/drivers/vfio/platform/vfio_platform_private.h +++ b/drivers/vfio/platform/vfio_platform_private.h @@ -69,6 +69,15 @@ struct vfio_platform_device { int (*get_irq)(struct vfio_platform_device *vdev, int i); }; +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 @@ -82,4 +91,8 @@ extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev, unsigned start, unsigned count, void *data); +extern int vfio_platform_register_reset(char *compat, struct module *owner, + vfio_platform_reset_fn_t reset); +extern int vfio_platform_unregister_reset(char *compat); + #endif /* VFIO_PLATFORM_PRIVATE_H */ -- 1.9.1 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
