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IB/hfi1: Add filter callback 

This commit adds a filter callback, which can be used to filter
out interval RB nodes matching a certain interval down to a
single one.

This is needed for the upcoming SDMA-side caching where buffers
will need to be filtered by their virtual address.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mitko Haralanov 2016-03-08 11:15:10 -08:00 committed by Doug Ledford
parent b8718e2e2e
commit 0f310a00e0
2 changed files with 15 additions and 5 deletions
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19
drivers/staging/rdma/hfi1/mmu_rb.c
View File

@ -181,13 +181,22 @@ static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *handler,
unsigned long addr,
unsigned long len)
{
struct mmu_rb_node *node;
struct mmu_rb_node *node = NULL;
hfi1_cdbg(MMU, "Searching for addr 0x%llx, len %u", addr, len);
node = __mmu_int_rb_iter_first(handler->root, addr, len);
if (node)
hfi1_cdbg(MMU, "Found node addr 0x%llx, len %u", node->addr,
node->len);
if (!handler->ops->filter) {
node = __mmu_int_rb_iter_first(handler->root, addr,
(addr + len) - 1);
} else {
for (node = __mmu_int_rb_iter_first(handler->root, addr,
(addr + len) - 1);
node;
node = __mmu_int_rb_iter_next(node, addr,
(addr + len) - 1)) {
if (handler->ops->filter(node, addr, len))
return node;
}
}
return node;
}

1
drivers/staging/rdma/hfi1/mmu_rb.h
View File

@ -57,6 +57,7 @@ struct mmu_rb_node {
};
struct mmu_rb_ops {
bool (*filter)(struct mmu_rb_node *, unsigned long, unsigned long);
int (*insert)(struct rb_root *, struct mmu_rb_node *);
void (*remove)(struct rb_root *, struct mmu_rb_node *, bool);
int (*invalidate)(struct rb_root *, struct mmu_rb_node *);