/*
 * Copyright (c) 2007 Cisco Systems.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef IB_UMEM_H
#define IB_UMEM_H

#include <linux/list.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>

struct ib_ucontext;
struct ib_umem_odp;

struct ib_umem {
	struct ib_ucontext     *context;
	size_t			length;
	unsigned long		address;
	int			page_size;
	int                     writable;
	int                     hugetlb;
	struct work_struct	work;
	struct pid             *pid;
	struct mm_struct       *mm;
	unsigned long		diff;
	struct ib_umem_odp     *odp_data;
	struct sg_table sg_head;
	int             nmap;
	int             npages;
};

/* Returns the offset of the umem start relative to the first page. */
static inline int ib_umem_offset(struct ib_umem *umem)
{
	return umem->address & ((unsigned long)umem->page_size - 1);
}

/* Returns the first page of an ODP umem. */
static inline unsigned long ib_umem_start(struct ib_umem *umem)
{
	return umem->address - ib_umem_offset(umem);
}

/* Returns the address of the page after the last one of an ODP umem. */
static inline unsigned long ib_umem_end(struct ib_umem *umem)
{
	return PAGE_ALIGN(umem->address + umem->length);
}

static inline size_t ib_umem_num_pages(struct ib_umem *umem)
{
	return (ib_umem_end(umem) - ib_umem_start(umem)) >> PAGE_SHIFT;
}

#ifdef CONFIG_INFINIBAND_USER_MEM

struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
			    size_t size, int access, int dmasync);
void ib_umem_release(struct ib_umem *umem);
int ib_umem_page_count(struct ib_umem *umem);
int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
		      size_t length);

#else /* CONFIG_INFINIBAND_USER_MEM */

#include <linux/err.h>

static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
					  unsigned long addr, size_t size,
					  int access, int dmasync) {
	return ERR_PTR(-EINVAL);
}
static inline void ib_umem_release(struct ib_umem *umem) { }
static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
		      		    size_t length) {
	return -EINVAL;
}
#endif /* CONFIG_INFINIBAND_USER_MEM */

#endif /* IB_UMEM_H */
ption><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Emmanuel Grumbach &lt;emmanuel.grumbach@intel.com&gt;</td><td class='right'>2016-05-03 12:08:43 +0300</td></tr>
<tr><th>committer</th><td>Emmanuel Grumbach &lt;emmanuel.grumbach@intel.com&gt;</td><td class='right'>2016-05-04 20:59:55 +0300</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68'>5c08b0f5026fcc13efb947c4d1f2ca3558145f68</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/arm?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68'>17820fa70707a2078dc4605c8f075e9fbb2fe137</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/arm?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68'>Documentation/arm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/arm?id=f742aaf36edf0390c54d0614bc4d20fd4cd3762a'>f742aaf36edf0390c54d0614bc4d20fd4cd3762a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/arm?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68&amp;id2=f742aaf36edf0390c54d0614bc4d20fd4cd3762a'>diff</a>)</td></tr></table>
<div class='commit-subject'>iwlwifi: mvm: don't override the rate with the AMSDU len</div><div class='commit-msg'>The TSO code creates A-MSDUs from a single large send. Each
A-MSDU is an skb and skb-&gt;len doesn't include the number of
bytes which need to be added for the headers being added
(subframe header, TCP header, IP header, SNAP, padding).

To be able to set the right value in the Tx command, we
put the number of bytes added by those headers in
driver_data in iwl_mvm_tx_tso and use this value in
iwl_mvm_set_tx_cmd.

The problem by setting this value in driver_data is that
it overrides the ieee80211_tx_info. The bug manifested
itself when we send P2P related frames in CCK since the
rate in ieee80211_tx_info is zero-ed. This of course is
a violation of the P2P specification.

To fix this, copy the original ieee80211_tx_info to the
stack and pass it to the functions which need it.
Assign the number of bytes added by the headers to the
driver_data inside the skb itself.

Fixes: a6d5e32f247c ("iwlwifi: mvm: send large SKBs to the transport")
Signed-off-by: Emmanuel Grumbach &lt;emmanuel.grumbach@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=5c08b0f5026fcc13efb947c4d1f2ca3558145f68'>Diffstat</a> (limited to 'Documentation/arm')</div><table summary='diffstat' class='diffstat'>