Index: uspace/lib/usbhost/src/dma_buffer.c
===================================================================
--- uspace/lib/usbhost/src/dma_buffer.c	(revision 55958412df6b000da41325bf219018aabc44bde9)
+++ 	(revision )
@@ -1,123 +1,0 @@
-/*
- * Copyright (c) 2013 Jan Vesely
- * Copyright (c) 2017 Ondrej Hlavaty <aearsis@eideo.cz>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-/**  @addtogroup libusbhost
- * @{
- */
-/** @file
- */
-
-#include <align.h>
-#include <as.h>
-#include <ddi.h>
-#include <stddef.h>
-
-#include "dma_buffer.h"
-
-dma_policy_t dma_policy_default = {
-	.use64 = false,
-	.alignment = PAGE_SIZE,
-};
-
-/**
- * Allocate a DMA buffer.
- *
- * @param[in] db dma_buffer_t structure to fill
- * @param[in] policy dma_policy_t structure to guide
- * @param[in] size Size of the required memory space
- * @return Error code.
- */
-int dma_buffer_alloc_policy(dma_buffer_t *db, size_t size, dma_policy_t policy)
-{
-	assert(db);
-
-	if (policy.alignment > PAGE_SIZE)
-		return EINVAL;
-
-	const size_t aligned_size = ALIGN_UP(size, policy.alignment);
-	const size_t real_size = ALIGN_UP(aligned_size, PAGE_SIZE);
-	const uintptr_t flags = policy.use64 ? 0 : DMAMEM_4GiB;
-
-	uintptr_t phys;
-	void *address = AS_AREA_ANY;
-
-	const int ret = dmamem_map_anonymous(real_size,
-	    flags, AS_AREA_READ | AS_AREA_WRITE, 0,
-	    &phys, &address);
-
-	if (ret == EOK) {
-		/* Poison, accessing it should be enough to make sure
-		 * the location is mapped, but poison works better */
-		memset(address, 0x5, real_size);
-		db->virt = address;
-		db->phys = phys;
-	}
-	return ret;
-}
-
-/**
- * Allocate a DMA buffer using the default policy.
- *
- * @param[in] db dma_buffer_t structure to fill
- * @param[in] size Size of the required memory space
- * @return Error code.
- */
-int dma_buffer_alloc(dma_buffer_t *db, size_t size)
-{
-	return dma_buffer_alloc_policy(db, size, dma_policy_default);
-}
-
-
-/**
- * Free a DMA buffer.
- *
- * @param[in] db dma_buffer_t structure buffer of which will be freed
- */
-void dma_buffer_free(dma_buffer_t *db)
-{
-	if (db->virt) {
-		dmamem_unmap_anonymous(db->virt);
-		db->virt = NULL;
-		db->phys = 0;
-	}
-}
-
-/**
- * Convert a pointer inside a buffer to physical address.
- *
- * @param[in] db Buffer at which virt is pointing
- * @param[in] virt Pointer somewhere inside db
- */
-uintptr_t dma_buffer_phys(const dma_buffer_t *db, void *virt)
-{
-	return db->phys + (virt - db->virt);
-}
-
-/**
- * @}
- */