Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
Reinette Chatre | 1f44780 | 2010-01-15 13:43:41 -0800 | [diff] [blame] | 3 | * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved. |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 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: |
Winkler, Tomas | 759ef89 | 2008-12-09 11:28:58 -0800 | [diff] [blame] | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 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 | |
Tomas Winkler | da1bc45 | 2008-05-29 16:35:00 +0800 | [diff] [blame] | 35 | #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) |
| 36 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 37 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 38 | static inline struct ieee80211_conf *ieee80211_get_hw_conf( |
| 39 | struct ieee80211_hw *hw) |
| 40 | { |
| 41 | return &hw->conf; |
| 42 | } |
| 43 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 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 | { |
Eric Sandeen | 9e7d1a4 | 2008-01-24 15:47:39 -0500 | [diff] [blame] | 52 | if (end >= start) |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 53 | return end - start; |
| 54 | |
Eric Sandeen | 9e7d1a4 | 2008-01-24 15:47:39 -0500 | [diff] [blame] | 55 | return end + (MAX_JIFFY_OFFSET - start) + 1; |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Tomas Winkler | c54b679 | 2008-03-06 17:36:53 -0800 | [diff] [blame] | 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 | |
Tomas Winkler | 98c9221 | 2008-01-14 17:46:20 -0800 | [diff] [blame] | 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) |
Stanislaw Gruszka | f36d04a | 2010-02-10 05:07:45 -0800 | [diff] [blame] | 83 | dma_free_coherent(&pci_dev->dev, desc->len, |
| 84 | desc->v_addr, desc->p_addr); |
Tomas Winkler | 98c9221 | 2008-01-14 17:46:20 -0800 | [diff] [blame] | 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 | { |
Stanislaw Gruszka | f36d04a | 2010-02-10 05:07:45 -0800 | [diff] [blame] | 92 | desc->v_addr = dma_alloc_coherent(&pci_dev->dev, desc->len, |
| 93 | &desc->p_addr, GFP_KERNEL); |
Tomas Winkler | 98c9221 | 2008-01-14 17:46:20 -0800 | [diff] [blame] | 94 | return (desc->v_addr != NULL) ? 0 : -ENOMEM; |
| 95 | } |
| 96 | |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 97 | /* |
| 98 | * we have 8 bits used like this: |
| 99 | * |
| 100 | * 7 6 5 4 3 2 1 0 |
| 101 | * | | | | | | | | |
| 102 | * | | | | | | +-+-------- AC queue (0-3) |
| 103 | * | | | | | | |
| 104 | * | +-+-+-+-+------------ HW A-MPDU queue |
| 105 | * | |
| 106 | * +---------------------- indicates agg queue |
| 107 | */ |
| 108 | static inline u8 iwl_virtual_agg_queue_num(u8 ac, u8 hwq) |
| 109 | { |
| 110 | BUG_ON(ac > 3); /* only have 2 bits */ |
| 111 | BUG_ON(hwq > 31); /* only have 5 bits */ |
| 112 | |
| 113 | return 0x80 | (hwq << 2) | ac; |
| 114 | } |
| 115 | |
| 116 | static inline void iwl_wake_queue(struct iwl_priv *priv, u8 queue) |
| 117 | { |
| 118 | u8 ac = queue; |
| 119 | u8 hwq = queue; |
| 120 | |
| 121 | if (queue & 0x80) { |
| 122 | ac = queue & 3; |
| 123 | hwq = (queue >> 2) & 0x1f; |
| 124 | } |
| 125 | |
| 126 | if (test_and_clear_bit(hwq, priv->queue_stopped)) |
| 127 | if (atomic_dec_return(&priv->queue_stop_count[ac]) <= 0) |
| 128 | ieee80211_wake_queue(priv->hw, ac); |
| 129 | } |
| 130 | |
| 131 | static inline void iwl_stop_queue(struct iwl_priv *priv, u8 queue) |
| 132 | { |
| 133 | u8 ac = queue; |
| 134 | u8 hwq = queue; |
| 135 | |
| 136 | if (queue & 0x80) { |
| 137 | ac = queue & 3; |
| 138 | hwq = (queue >> 2) & 0x1f; |
| 139 | } |
| 140 | |
| 141 | if (!test_and_set_bit(hwq, priv->queue_stopped)) |
| 142 | if (atomic_inc_return(&priv->queue_stop_count[ac]) > 0) |
| 143 | ieee80211_stop_queue(priv->hw, ac); |
| 144 | } |
| 145 | |
| 146 | #define ieee80211_stop_queue DO_NOT_USE_ieee80211_stop_queue |
| 147 | #define ieee80211_wake_queue DO_NOT_USE_ieee80211_wake_queue |
| 148 | |
Wey-Yi Guy | 30a12a8 | 2009-07-17 09:30:27 -0700 | [diff] [blame] | 149 | static inline void iwl_disable_interrupts(struct iwl_priv *priv) |
| 150 | { |
| 151 | clear_bit(STATUS_INT_ENABLED, &priv->status); |
| 152 | |
| 153 | /* disable interrupts from uCode/NIC to host */ |
| 154 | iwl_write32(priv, CSR_INT_MASK, 0x00000000); |
| 155 | |
| 156 | /* acknowledge/clear/reset any interrupts still pending |
| 157 | * from uCode or flow handler (Rx/Tx DMA) */ |
| 158 | iwl_write32(priv, CSR_INT, 0xffffffff); |
| 159 | iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff); |
| 160 | IWL_DEBUG_ISR(priv, "Disabled interrupts\n"); |
| 161 | } |
| 162 | |
| 163 | static inline void iwl_enable_interrupts(struct iwl_priv *priv) |
| 164 | { |
| 165 | IWL_DEBUG_ISR(priv, "Enabling interrupts\n"); |
| 166 | set_bit(STATUS_INT_ENABLED, &priv->status); |
| 167 | iwl_write32(priv, CSR_INT_MASK, priv->inta_mask); |
| 168 | } |
| 169 | |
Zhu Yi | b481de9 | 2007-09-25 17:54:57 -0700 | [diff] [blame] | 170 | #endif /* __iwl_helpers_h__ */ |