Wey-Yi Guy | be663ab | 2011-02-21 11:27:26 -0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. |
| 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: |
| 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
| 26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 27 | * |
| 28 | *****************************************************************************/ |
| 29 | |
| 30 | #ifndef __iwl_legacy_helpers_h__ |
| 31 | #define __iwl_legacy_helpers_h__ |
| 32 | |
| 33 | #include <linux/ctype.h> |
| 34 | #include <net/mac80211.h> |
| 35 | |
| 36 | #include "iwl-io.h" |
| 37 | |
| 38 | #define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo)))) |
| 39 | |
| 40 | |
| 41 | static inline struct ieee80211_conf *iwl_legacy_ieee80211_get_hw_conf( |
| 42 | struct ieee80211_hw *hw) |
| 43 | { |
| 44 | return &hw->conf; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * iwl_legacy_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 | */ |
| 52 | static inline int iwl_legacy_queue_inc_wrap(int index, int n_bd) |
| 53 | { |
| 54 | return ++index & (n_bd - 1); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * iwl_legacy_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 | */ |
| 62 | static inline int iwl_legacy_queue_dec_wrap(int index, int n_bd) |
| 63 | { |
| 64 | return --index & (n_bd - 1); |
| 65 | } |
| 66 | |
| 67 | /* TODO: Move fw_desc functions to iwl-pci.ko */ |
| 68 | static inline void iwl_legacy_free_fw_desc(struct pci_dev *pci_dev, |
| 69 | struct fw_desc *desc) |
| 70 | { |
| 71 | if (desc->v_addr) |
| 72 | dma_free_coherent(&pci_dev->dev, desc->len, |
| 73 | desc->v_addr, desc->p_addr); |
| 74 | desc->v_addr = NULL; |
| 75 | desc->len = 0; |
| 76 | } |
| 77 | |
| 78 | static inline int iwl_legacy_alloc_fw_desc(struct pci_dev *pci_dev, |
| 79 | struct fw_desc *desc) |
| 80 | { |
| 81 | if (!desc->len) { |
| 82 | desc->v_addr = NULL; |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | |
| 86 | desc->v_addr = dma_alloc_coherent(&pci_dev->dev, desc->len, |
| 87 | &desc->p_addr, GFP_KERNEL); |
| 88 | return (desc->v_addr != NULL) ? 0 : -ENOMEM; |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * we have 8 bits used like this: |
| 93 | * |
| 94 | * 7 6 5 4 3 2 1 0 |
| 95 | * | | | | | | | | |
| 96 | * | | | | | | +-+-------- AC queue (0-3) |
| 97 | * | | | | | | |
| 98 | * | +-+-+-+-+------------ HW queue ID |
| 99 | * | |
| 100 | * +---------------------- unused |
| 101 | */ |
| 102 | static inline void |
| 103 | iwl_legacy_set_swq_id(struct iwl_tx_queue *txq, u8 ac, u8 hwq) |
| 104 | { |
| 105 | BUG_ON(ac > 3); /* only have 2 bits */ |
| 106 | BUG_ON(hwq > 31); /* only use 5 bits */ |
| 107 | |
| 108 | txq->swq_id = (hwq << 2) | ac; |
| 109 | } |
| 110 | |
| 111 | static inline void iwl_legacy_wake_queue(struct iwl_priv *priv, |
| 112 | struct iwl_tx_queue *txq) |
| 113 | { |
| 114 | u8 queue = txq->swq_id; |
| 115 | u8 ac = queue & 3; |
| 116 | u8 hwq = (queue >> 2) & 0x1f; |
| 117 | |
| 118 | if (test_and_clear_bit(hwq, priv->queue_stopped)) |
| 119 | if (atomic_dec_return(&priv->queue_stop_count[ac]) <= 0) |
| 120 | ieee80211_wake_queue(priv->hw, ac); |
| 121 | } |
| 122 | |
| 123 | static inline void iwl_legacy_stop_queue(struct iwl_priv *priv, |
| 124 | struct iwl_tx_queue *txq) |
| 125 | { |
| 126 | u8 queue = txq->swq_id; |
| 127 | u8 ac = queue & 3; |
| 128 | u8 hwq = (queue >> 2) & 0x1f; |
| 129 | |
| 130 | if (!test_and_set_bit(hwq, priv->queue_stopped)) |
| 131 | if (atomic_inc_return(&priv->queue_stop_count[ac]) > 0) |
| 132 | ieee80211_stop_queue(priv->hw, ac); |
| 133 | } |
| 134 | |
| 135 | #define ieee80211_stop_queue DO_NOT_USE_ieee80211_stop_queue |
| 136 | #define ieee80211_wake_queue DO_NOT_USE_ieee80211_wake_queue |
| 137 | |
| 138 | static inline void iwl_legacy_disable_interrupts(struct iwl_priv *priv) |
| 139 | { |
| 140 | clear_bit(STATUS_INT_ENABLED, &priv->status); |
| 141 | |
| 142 | /* disable interrupts from uCode/NIC to host */ |
| 143 | iwl_write32(priv, CSR_INT_MASK, 0x00000000); |
| 144 | |
| 145 | /* acknowledge/clear/reset any interrupts still pending |
| 146 | * from uCode or flow handler (Rx/Tx DMA) */ |
| 147 | iwl_write32(priv, CSR_INT, 0xffffffff); |
| 148 | iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff); |
| 149 | IWL_DEBUG_ISR(priv, "Disabled interrupts\n"); |
| 150 | } |
| 151 | |
Stanislaw Gruszka | a078a1f | 2011-04-28 11:51:25 +0200 | [diff] [blame] | 152 | static inline void iwl_legacy_enable_rfkill_int(struct iwl_priv *priv) |
| 153 | { |
| 154 | IWL_DEBUG_ISR(priv, "Enabling rfkill interrupt\n"); |
| 155 | iwl_write32(priv, CSR_INT_MASK, CSR_INT_BIT_RF_KILL); |
| 156 | } |
| 157 | |
Wey-Yi Guy | be663ab | 2011-02-21 11:27:26 -0800 | [diff] [blame] | 158 | static inline void iwl_legacy_enable_interrupts(struct iwl_priv *priv) |
| 159 | { |
| 160 | IWL_DEBUG_ISR(priv, "Enabling interrupts\n"); |
| 161 | set_bit(STATUS_INT_ENABLED, &priv->status); |
| 162 | iwl_write32(priv, CSR_INT_MASK, priv->inta_mask); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * iwl_legacy_beacon_time_mask_low - mask of lower 32 bit of beacon time |
| 167 | * @priv -- pointer to iwl_priv data structure |
| 168 | * @tsf_bits -- number of bits need to shift for masking) |
| 169 | */ |
| 170 | static inline u32 iwl_legacy_beacon_time_mask_low(struct iwl_priv *priv, |
| 171 | u16 tsf_bits) |
| 172 | { |
| 173 | return (1 << tsf_bits) - 1; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * iwl_legacy_beacon_time_mask_high - mask of higher 32 bit of beacon time |
| 178 | * @priv -- pointer to iwl_priv data structure |
| 179 | * @tsf_bits -- number of bits need to shift for masking) |
| 180 | */ |
| 181 | static inline u32 iwl_legacy_beacon_time_mask_high(struct iwl_priv *priv, |
| 182 | u16 tsf_bits) |
| 183 | { |
| 184 | return ((1 << (32 - tsf_bits)) - 1) << tsf_bits; |
| 185 | } |
| 186 | |
| 187 | #endif /* __iwl_legacy_helpers_h__ */ |