/*
 * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __RC_MINSTREL_HT_H
#define __RC_MINSTREL_HT_H

/*
 * The number of streams can be changed to 2 to reduce code
 * size and memory footprint.
 */
#define MINSTREL_MAX_STREAMS		3
#define MINSTREL_HT_STREAM_GROUPS	4 /* BW(=2) * SGI(=2) */
#ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
#define MINSTREL_VHT_STREAM_GROUPS	6 /* BW(=3) * SGI(=2) */
#else
#define MINSTREL_VHT_STREAM_GROUPS	0
#endif

#define MINSTREL_HT_GROUPS_NB	(MINSTREL_MAX_STREAMS *		\
				 MINSTREL_HT_STREAM_GROUPS)
#define MINSTREL_VHT_GROUPS_NB	(MINSTREL_MAX_STREAMS *		\
				 MINSTREL_VHT_STREAM_GROUPS)
#define MINSTREL_CCK_GROUPS_NB	1
#define MINSTREL_GROUPS_NB	(MINSTREL_HT_GROUPS_NB +	\
				 MINSTREL_VHT_GROUPS_NB +	\
				 MINSTREL_CCK_GROUPS_NB)

#define MINSTREL_HT_GROUP_0	0
#define MINSTREL_CCK_GROUP	(MINSTREL_HT_GROUP_0 + MINSTREL_HT_GROUPS_NB)
#define MINSTREL_VHT_GROUP_0	(MINSTREL_CCK_GROUP + 1)

#ifdef CONFIG_MAC80211_RC_MINSTREL_VHT
#define MCS_GROUP_RATES		10
#else
#define MCS_GROUP_RATES		8
#endif

struct mcs_group {
	u32 flags;
	unsigned int streams;
	unsigned int duration[MCS_GROUP_RATES];
};

extern const struct mcs_group minstrel_mcs_groups[];

struct minstrel_mcs_group_data {
	u8 index;
	u8 column;

	/* bitfield of supported MCS rates of this group */
	u16 supported;

	/* sorted rate set within a MCS group*/
	u16 max_group_tp_rate[MAX_THR_RATES];
	u16 max_group_prob_rate;

	/* MCS rate statistics */
	struct minstrel_rate_stats rates[MCS_GROUP_RATES];
};

struct minstrel_ht_sta {
	struct ieee80211_sta *sta;

	/* ampdu length (average, per sampling interval) */
	unsigned int ampdu_len;
	unsigned int ampdu_packets;

	/* ampdu length (EWMA) */
	unsigned int avg_ampdu_len;

	/* overall sorted rate set */
	u16 max_tp_rate[MAX_THR_RATES];
	u16 max_prob_rate;

	/* time of last status update */
	unsigned long last_stats_update;

	/* overhead time in usec for each frame */
	unsigned int overhead;
	unsigned int overhead_rtscts;

	unsigned int total_packets;
	unsigned int sample_packets;

	/* tx flags to add for frames for this sta */
	u32 tx_flags;

	u8 sample_wait;
	u8 sample_tries;
	u8 sample_count;
	u8 sample_slow;

	/* current MCS group to be sampled */
	u8 sample_group;

	u8 cck_supported;
	u8 cck_supported_short;

	/* MCS rate group info and statistics */
	struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
};

struct minstrel_ht_sta_priv {
	union {
		struct minstrel_ht_sta ht;
		struct minstrel_sta_info legacy;
	};
#ifdef CONFIG_MAC80211_DEBUGFS
	struct dentry *dbg_stats;
	struct dentry *dbg_stats_csv;
#endif
	void *ratelist;
	void *sample_table;
	bool is_ht;
};

void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
void minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta);
int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
			   int prob_ewma);

#endif
ft'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/tools/testing?id=58be2427da98a17426cff3d30c50e419781a230b'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr class='logheader'><td><span title='2017-02-06 22:50:04 -0500'>2017-02-06</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=63dfef75ed75364901d7caa52c6420cec3e73519'>bpf: enable verifier to add 0 to packet ptr</a></td><td>William Tu</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+23</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
The patch fixes the case when adding a zero value to the packet
pointer.  The zero value could come from src_reg equals type
BPF_K or CONST_IMM.  The patch fixes both, otherwise the verifer
reports the following error:
  [...]
    R0=imm0,min_value=0,max_value=0
    R1=pkt(id=0,off=0,r=4)
    R2=pkt_end R3=fp-12
    R4=imm4,min_value=4,max_value=4
    R5=pkt(id=0,off=4,r=4)
  269: (bf) r2 = r0     // r2 becomes imm0
  270: (77) r2 &gt;&gt;= 3
  271: (bf) r4 = r1     // r4 becomes pkt ptr
  272: (0f) r4 += r2    // r4 += 0
  addition of negative constant to packet pointer is not allowed

Signed-off-by: William Tu &lt;u9012063@gmail.com&gt;
Signed-off-by: Mihai Budiu &lt;mbudiu@vmware.com&gt;
Cc: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Cc: Alexei Starovoitov &lt;ast@kernel.org&gt;
Acked-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Acked-by: Alexei Starovoitov &lt;ast@kernel.org&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;


</td></tr>
<tr class='logheader'><td><span title='2017-02-06 22:35:58 -0500'>2017-02-06</span></td><td class='logsubject'><a href='/cgit.cgi/linux/net-next.git/commit/tools/testing?id=29200c199cc9bde59033ab30fcc40b6c8ae630b0'>bpf: test for AND edge cases</a></td><td>Josef Bacik</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+55</span></td></tr>
<tr class='nohover-highlight'><td/><td colspan='5' class='logmsg'>
These two tests are based on the work done for f23cc643f9ba.  The first test is
just a basic one to make sure we don't allow AND'ing negative values, even if it
would result in a valid index for the array.  The second is a cleaned up version
of the original testcase provided by Jann Horn that resulted in the commit.

Acked-by: Alexei Starovoitov &lt;ast@kernel.org&gt;
Acked-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Josef Bacik &lt;jbacik@fb.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;


</td></tr>