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IB/hfi1: Add evict operation to the mmu rb handler

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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>
This commit is contained in:
Dean Luick 2016-07-28 15:21:22 -04:00 committed by Doug Ledford
parent 622c202c4a
commit 1034599805
2 changed files with 38 additions and 0 deletions
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34
drivers/infiniband/hw/hfi1/mmu_rb.c
View File

@ -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)
{

4
drivers/infiniband/hw/hfi1/mmu_rb.h
View File

@ -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,