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b481de9c ZY |
1 | /****************************************************************************** |
2 | * | |
01f8162a | 3 | * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved. |
b481de9c ZY |
4 | * |
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: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
b481de9c ZY |
26 | * 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> | |
34 | ||
da1bc453 TW |
35 | #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) |
36 | ||
b481de9c | 37 | |
b481de9c ZY |
38 | static inline struct ieee80211_conf *ieee80211_get_hw_conf( |
39 | struct ieee80211_hw *hw) | |
40 | { | |
41 | return &hw->conf; | |
42 | } | |
43 | ||
b481de9c ZY |
44 | static inline int iwl_check_bits(unsigned long field, unsigned long mask) |
45 | { | |
46 | return ((field & mask) == mask) ? 1 : 0; | |
47 | } | |
48 | ||
49 | static inline unsigned long elapsed_jiffies(unsigned long start, | |
50 | unsigned long end) | |
51 | { | |
9e7d1a44 | 52 | if (end >= start) |
b481de9c ZY |
53 | return end - start; |
54 | ||
9e7d1a44 | 55 | return end + (MAX_JIFFY_OFFSET - start) + 1; |
b481de9c ZY |
56 | } |
57 | ||
c54b679d TW |
58 | /** |
59 | * iwl_queue_inc_wrap - increment queue index, wrap back to beginning | |
60 | * @index -- current index | |
61 | * @n_bd -- total number of entries in queue (must be power of 2) | |
62 | */ | |
63 | static inline int iwl_queue_inc_wrap(int index, int n_bd) | |
64 | { | |
65 | return ++index & (n_bd - 1); | |
66 | } | |
67 | ||
68 | /** | |
69 | * iwl_queue_dec_wrap - decrement queue index, wrap back to end | |
70 | * @index -- current index | |
71 | * @n_bd -- total number of entries in queue (must be power of 2) | |
72 | */ | |
73 | static inline int iwl_queue_dec_wrap(int index, int n_bd) | |
74 | { | |
75 | return --index & (n_bd - 1); | |
76 | } | |
77 | ||
98c92211 TW |
78 | /* TODO: Move fw_desc functions to iwl-pci.ko */ |
79 | static inline void iwl_free_fw_desc(struct pci_dev *pci_dev, | |
80 | struct fw_desc *desc) | |
81 | { | |
82 | if (desc->v_addr) | |
83 | pci_free_consistent(pci_dev, desc->len, | |
84 | desc->v_addr, desc->p_addr); | |
85 | desc->v_addr = NULL; | |
86 | desc->len = 0; | |
87 | } | |
88 | ||
89 | static inline int iwl_alloc_fw_desc(struct pci_dev *pci_dev, | |
90 | struct fw_desc *desc) | |
91 | { | |
92 | desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr); | |
93 | return (desc->v_addr != NULL) ? 0 : -ENOMEM; | |
94 | } | |
95 | ||
e4e72fb4 JB |
96 | /* |
97 | * we have 8 bits used like this: | |
98 | * | |
99 | * 7 6 5 4 3 2 1 0 | |
100 | * | | | | | | | | | |
101 | * | | | | | | +-+-------- AC queue (0-3) | |
102 | * | | | | | | | |
103 | * | +-+-+-+-+------------ HW A-MPDU queue | |
104 | * | | |
105 | * +---------------------- indicates agg queue | |
106 | */ | |
107 | static inline u8 iwl_virtual_agg_queue_num(u8 ac, u8 hwq) | |
108 | { | |
109 | BUG_ON(ac > 3); /* only have 2 bits */ | |
110 | BUG_ON(hwq > 31); /* only have 5 bits */ | |
111 | ||
112 | return 0x80 | (hwq << 2) | ac; | |
113 | } | |
114 | ||
115 | static inline void iwl_wake_queue(struct iwl_priv *priv, u8 queue) | |
116 | { | |
117 | u8 ac = queue; | |
118 | u8 hwq = queue; | |
119 | ||
120 | if (queue & 0x80) { | |
121 | ac = queue & 3; | |
122 | hwq = (queue >> 2) & 0x1f; | |
123 | } | |
124 | ||
125 | if (test_and_clear_bit(hwq, priv->queue_stopped)) | |
126 | if (atomic_dec_return(&priv->queue_stop_count[ac]) <= 0) | |
127 | ieee80211_wake_queue(priv->hw, ac); | |
128 | } | |
129 | ||
130 | static inline void iwl_stop_queue(struct iwl_priv *priv, u8 queue) | |
131 | { | |
132 | u8 ac = queue; | |
133 | u8 hwq = queue; | |
134 | ||
135 | if (queue & 0x80) { | |
136 | ac = queue & 3; | |
137 | hwq = (queue >> 2) & 0x1f; | |
138 | } | |
139 | ||
140 | if (!test_and_set_bit(hwq, priv->queue_stopped)) | |
141 | if (atomic_inc_return(&priv->queue_stop_count[ac]) > 0) | |
142 | ieee80211_stop_queue(priv->hw, ac); | |
143 | } | |
144 | ||
145 | #define ieee80211_stop_queue DO_NOT_USE_ieee80211_stop_queue | |
146 | #define ieee80211_wake_queue DO_NOT_USE_ieee80211_wake_queue | |
147 | ||
b481de9c | 148 | #endif /* __iwl_helpers_h__ */ |