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Commit 0f310a00 authored by Mitko Haralanov's avatar Mitko Haralanov Committed by Doug Ledford
Browse files

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: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
Signed-off-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: default avatarJubin John <jubin.john@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent b8718e2e

drivers/staging/rdma/hfi1/mmu_rb.c

+14 −5
Original line number Diff line number Diff line
@@ -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;

}

drivers/staging/rdma/hfi1/mmu_rb.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *);