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authorDean Luick <dean.luick@intel.com>2016-07-28 15:21:22 -0400
committerDoug Ledford <dledford@redhat.com>2016-08-02 22:46:21 -0400
commit1034599805009394cc42e6c538575d12d8dc57fa (patch)
tree31db4fba514eb0642ccfc67ef7c4de3d9f10404e /drivers
parent622c202c4a4697636334761d7ca295ebd35074e4 (diff)
downloadlinux-1034599805009394cc42e6c538575d12d8dc57fa.tar.bz2
IB/hfi1: Add evict operation to the mmu rb handler
Allow users to clear nodes from the rb tree based on their evict callback. Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/hfi1/mmu_rb.c34
-rw-r--r--drivers/infiniband/hw/hfi1/mmu_rb.h4
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.c b/drivers/infiniband/hw/hfi1/mmu_rb.c
index 9fbcfed4d34c..97f2d3680751 100644
--- a/drivers/infiniband/hw/hfi1/mmu_rb.c
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.c
@@ -206,6 +206,40 @@ struct mmu_rb_node *hfi1_mmu_rb_extract(struct mmu_rb_handler *handler,
return node;
}
+void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg)
+{
+ struct mmu_rb_node *rbnode;
+ struct rb_node *node, *next;
+ struct list_head del_list;
+ unsigned long flags;
+ bool stop = false;
+
+ INIT_LIST_HEAD(&del_list);
+
+ spin_lock_irqsave(&handler->lock, flags);
+ for (node = rb_first(&handler->root); node; node = next) {
+ next = rb_next(node);
+ rbnode = rb_entry(node, struct mmu_rb_node, node);
+ if (handler->ops->evict(handler->ops_arg, rbnode, evict_arg,
+ &stop)) {
+ __mmu_int_rb_remove(rbnode, &handler->root);
+ list_add(&rbnode->list, &del_list);
+ }
+ if (stop)
+ break;
+ }
+ spin_unlock_irqrestore(&handler->lock, flags);
+
+ down_write(&handler->mm->mmap_sem);
+ while (!list_empty(&del_list)) {
+ rbnode = list_first_entry(&del_list, struct mmu_rb_node, list);
+ list_del(&rbnode->list);
+ handler->ops->remove(handler->ops_arg, rbnode,
+ handler->mm);
+ }
+ up_write(&handler->mm->mmap_sem);
+}
+
void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler,
struct mmu_rb_node *node)
{
diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.h b/drivers/infiniband/hw/hfi1/mmu_rb.h
index 2cedfbe2189e..09e5888c0818 100644
--- a/drivers/infiniband/hw/hfi1/mmu_rb.h
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.h
@@ -54,6 +54,7 @@ struct mmu_rb_node {
unsigned long len;
unsigned long __last;
struct rb_node node;
+ struct list_head list;
};
struct mmu_rb_ops {
@@ -63,6 +64,8 @@ struct mmu_rb_ops {
void (*remove)(void *ops_arg, struct mmu_rb_node *mnode,
struct mm_struct *mm);
int (*invalidate)(void *ops_arg, struct mmu_rb_node *node);
+ int (*evict)(void *ops_arg, struct mmu_rb_node *mnode,
+ void *evict_arg, bool *stop);
};
int hfi1_mmu_rb_register(void *ops_arg, struct mm_struct *mm,
@@ -71,6 +74,7 @@ int hfi1_mmu_rb_register(void *ops_arg, struct mm_struct *mm,
void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler);
int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler,
struct mmu_rb_node *mnode);
+void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg);
void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler,
struct mmu_rb_node *mnode);
struct mmu_rb_node *hfi1_mmu_rb_extract(struct mmu_rb_handler *handler,