blob: 41207a3645b81540c0d4d84aeff81e5e25ae4b44 [file] [log] [blame]
Zhu Yib481de92007-09-25 17:54:57 -07001/******************************************************************************
2 *
Wey-Yi Guy901069c2011-04-05 09:42:00 -07003 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
Zhu Yib481de92007-09-25 17:54:57 -07004 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
Winkler, Tomas759ef892008-12-09 11:28:58 -080025 * Intel Linux Wireless <ilw@linux.intel.com>
Zhu Yib481de92007-09-25 17:54:57 -070026 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30#ifndef __iwl_helpers_h__
31#define __iwl_helpers_h__
32
33#include <linux/ctype.h>
Johannes Berga1175122010-01-21 06:21:10 -080034#include <net/mac80211.h>
35
36#include "iwl-io.h"
Zhu Yib481de92007-09-25 17:54:57 -070037
Tomas Winklerda1bc452008-05-29 16:35:00 +080038#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
39
Zhu Yib481de92007-09-25 17:54:57 -070040
Zhu Yib481de92007-09-25 17:54:57 -070041static inline struct ieee80211_conf *ieee80211_get_hw_conf(
42 struct ieee80211_hw *hw)
43{
44 return &hw->conf;
45}
46
Tomas Winklerc54b6792008-03-06 17:36:53 -080047/**
48 * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
49 * @index -- current index
50 * @n_bd -- total number of entries in queue (must be power of 2)
51 */
52static inline int iwl_queue_inc_wrap(int index, int n_bd)
53{
54 return ++index & (n_bd - 1);
55}
56
57/**
58 * iwl_queue_dec_wrap - decrement queue index, wrap back to end
59 * @index -- current index
60 * @n_bd -- total number of entries in queue (must be power of 2)
61 */
62static inline int iwl_queue_dec_wrap(int index, int n_bd)
63{
64 return --index & (n_bd - 1);
65}
66
Johannes Berge4e72fb2009-03-23 17:28:42 +010067/*
68 * we have 8 bits used like this:
69 *
70 * 7 6 5 4 3 2 1 0
71 * | | | | | | | |
72 * | | | | | | +-+-------- AC queue (0-3)
73 * | | | | | |
Johannes Bergea9b3072010-11-10 18:25:45 -080074 * | +-+-+-+-+------------ HW queue ID
Johannes Berge4e72fb2009-03-23 17:28:42 +010075 * |
Johannes Bergea9b3072010-11-10 18:25:45 -080076 * +---------------------- unused
Johannes Berge4e72fb2009-03-23 17:28:42 +010077 */
Johannes Bergea9b3072010-11-10 18:25:45 -080078static inline void iwl_set_swq_id(struct iwl_tx_queue *txq, u8 ac, u8 hwq)
Johannes Berge4e72fb2009-03-23 17:28:42 +010079{
80 BUG_ON(ac > 3); /* only have 2 bits */
Johannes Bergea9b3072010-11-10 18:25:45 -080081 BUG_ON(hwq > 31); /* only use 5 bits */
Johannes Berge4e72fb2009-03-23 17:28:42 +010082
Johannes Bergea9b3072010-11-10 18:25:45 -080083 txq->swq_id = (hwq << 2) | ac;
Johannes Berge4e72fb2009-03-23 17:28:42 +010084}
85
Johannes Berg549a04e2010-11-10 18:25:44 -080086static inline void iwl_wake_queue(struct iwl_priv *priv,
87 struct iwl_tx_queue *txq)
Johannes Berge4e72fb2009-03-23 17:28:42 +010088{
Johannes Berg549a04e2010-11-10 18:25:44 -080089 u8 queue = txq->swq_id;
Johannes Bergea9b3072010-11-10 18:25:45 -080090 u8 ac = queue & 3;
91 u8 hwq = (queue >> 2) & 0x1f;
Johannes Berge4e72fb2009-03-23 17:28:42 +010092
93 if (test_and_clear_bit(hwq, priv->queue_stopped))
94 if (atomic_dec_return(&priv->queue_stop_count[ac]) <= 0)
95 ieee80211_wake_queue(priv->hw, ac);
96}
97
Johannes Berg549a04e2010-11-10 18:25:44 -080098static inline void iwl_stop_queue(struct iwl_priv *priv,
99 struct iwl_tx_queue *txq)
Johannes Berge4e72fb2009-03-23 17:28:42 +0100100{
Johannes Berg549a04e2010-11-10 18:25:44 -0800101 u8 queue = txq->swq_id;
Johannes Bergea9b3072010-11-10 18:25:45 -0800102 u8 ac = queue & 3;
103 u8 hwq = (queue >> 2) & 0x1f;
Johannes Berge4e72fb2009-03-23 17:28:42 +0100104
105 if (!test_and_set_bit(hwq, priv->queue_stopped))
106 if (atomic_inc_return(&priv->queue_stop_count[ac]) > 0)
107 ieee80211_stop_queue(priv->hw, ac);
108}
109
Garen Tamrazian68b99312011-03-30 02:29:32 -0700110static inline void iwl_wake_any_queue(struct iwl_priv *priv,
111 struct iwl_rxon_context *ctx)
112{
113 u8 ac;
114
115 for (ac = 0; ac < AC_NUM; ac++) {
116 IWL_DEBUG_INFO(priv, "Queue Status: Q[%d] %s\n",
117 ac, (atomic_read(&priv->queue_stop_count[ac]) > 0)
118 ? "stopped" : "awake");
119 iwl_wake_queue(priv, &priv->txq[ctx->ac_to_queue[ac]]);
120 }
121}
122
Johannes Berge4e72fb2009-03-23 17:28:42 +0100123#define ieee80211_stop_queue DO_NOT_USE_ieee80211_stop_queue
124#define ieee80211_wake_queue DO_NOT_USE_ieee80211_wake_queue
125
Wey-Yi Guy30a12a82009-07-17 09:30:27 -0700126static inline void iwl_disable_interrupts(struct iwl_priv *priv)
127{
128 clear_bit(STATUS_INT_ENABLED, &priv->status);
129
130 /* disable interrupts from uCode/NIC to host */
131 iwl_write32(priv, CSR_INT_MASK, 0x00000000);
132
133 /* acknowledge/clear/reset any interrupts still pending
134 * from uCode or flow handler (Rx/Tx DMA) */
135 iwl_write32(priv, CSR_INT, 0xffffffff);
136 iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
137 IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
138}
139
Stanislaw Gruszka554d1d02010-12-23 12:38:21 +0100140static inline void iwl_enable_rfkill_int(struct iwl_priv *priv)
141{
142 IWL_DEBUG_ISR(priv, "Enabling rfkill interrupt\n");
143 iwl_write32(priv, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
144}
145
Wey-Yi Guy30a12a82009-07-17 09:30:27 -0700146static inline void iwl_enable_interrupts(struct iwl_priv *priv)
147{
148 IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
149 set_bit(STATUS_INT_ENABLED, &priv->status);
150 iwl_write32(priv, CSR_INT_MASK, priv->inta_mask);
151}
152
Wey-Yi Guya0ee74c2010-05-06 08:54:10 -0700153/**
154 * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
155 * @priv -- pointer to iwl_priv data structure
156 * @tsf_bits -- number of bits need to shift for masking)
157 */
158static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
159 u16 tsf_bits)
160{
161 return (1 << tsf_bits) - 1;
162}
163
164/**
165 * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
166 * @priv -- pointer to iwl_priv data structure
167 * @tsf_bits -- number of bits need to shift for masking)
168 */
169static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
170 u16 tsf_bits)
171{
172 return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
173}
174
Zhu Yib481de92007-09-25 17:54:57 -0700175#endif /* __iwl_helpers_h__ */