| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved. |
| * |
| * Portions of this file are derived from the ipw3945 project, as well |
| * as portions of the ieee80211 subsystem header files. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| * Contact Information: |
| * James P. Ketrenos <ipw2100-admin@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| #ifndef __iwl_helpers_h__ |
| #define __iwl_helpers_h__ |
| |
| #include <linux/ctype.h> |
| |
| /* |
| * The structures defined by the hardware/uCode interface |
| * have bit-wise operations. For each bit-field there is |
| * a data symbol in the structure, the start bit position |
| * and the length of the bit-field. |
| * |
| * iwl_get_bits and iwl_set_bits will return or set the |
| * appropriate bits on a 32-bit value. |
| * |
| * IWL_GET_BITS and IWL_SET_BITS use symbol expansion to |
| * expand out to the appropriate call to iwl_get_bits |
| * and iwl_set_bits without having to reference all of the |
| * numerical constants and defines provided in the hardware |
| * definition |
| */ |
| |
| /** |
| * iwl_get_bits - Extract a hardware bit-field value |
| * @src: source hardware value (__le32) |
| * @pos: bit-position (0-based) of first bit of value |
| * @len: length of bit-field |
| * |
| * iwl_get_bits will return the bit-field in cpu endian ordering. |
| * |
| * NOTE: If used from IWL_GET_BITS then pos and len are compile-constants and |
| * will collapse to minimal code by the compiler. |
| */ |
| static inline u32 iwl_get_bits(__le32 src, u8 pos, u8 len) |
| { |
| u32 tmp = le32_to_cpu(src); |
| |
| tmp >>= pos; |
| tmp &= (1UL << len) - 1; |
| return tmp; |
| } |
| |
| /** |
| * iwl_set_bits - Set a hardware bit-field value |
| * @dst: Address of __le32 hardware value |
| * @pos: bit-position (0-based) of first bit of value |
| * @len: length of bit-field |
| * @val: cpu endian value to encode into the bit-field |
| * |
| * iwl_set_bits will encode val into dst, masked to be len bits long at bit |
| * position pos. |
| * |
| * NOTE: If used IWL_SET_BITS pos and len will be compile-constants and |
| * will collapse to minimal code by the compiler. |
| */ |
| static inline void iwl_set_bits(__le32 *dst, u8 pos, u8 len, int val) |
| { |
| u32 tmp = le32_to_cpu(*dst); |
| |
| tmp &= ~(((1UL << len) - 1) << pos); |
| tmp |= (val & ((1UL << len) - 1)) << pos; |
| *dst = cpu_to_le32(tmp); |
| } |
| |
| static inline void iwl_set_bits16(__le16 *dst, u8 pos, u8 len, int val) |
| { |
| u16 tmp = le16_to_cpu(*dst); |
| |
| tmp &= ~((1UL << (pos + len)) - (1UL << pos)); |
| tmp |= (val & ((1UL << len) - 1)) << pos; |
| *dst = cpu_to_le16(tmp); |
| } |
| |
| /* |
| * The bit-field definitions in iwl-xxxx-hw.h are in the form of: |
| * |
| * struct example { |
| * __le32 val1; |
| * #define IWL_name_POS 8 |
| * #define IWL_name_LEN 4 |
| * #define IWL_name_SYM val1 |
| * }; |
| * |
| * The IWL_SET_BITS and IWL_GET_BITS macros are provided to allow the driver |
| * to call: |
| * |
| * struct example bar; |
| * u32 val = IWL_GET_BITS(bar, name); |
| * val = val * 2; |
| * IWL_SET_BITS(bar, name, val); |
| * |
| * All cpu / host ordering, masking, and shifts are performed by the macros |
| * and iwl_{get,set}_bits. |
| * |
| */ |
| #define IWL_SET_BITS(s, sym, v) \ |
| iwl_set_bits(&(s).IWL_ ## sym ## _SYM, IWL_ ## sym ## _POS, \ |
| IWL_ ## sym ## _LEN, (v)) |
| |
| #define IWL_SET_BITS16(s, sym, v) \ |
| iwl_set_bits16(&(s).IWL_ ## sym ## _SYM, IWL_ ## sym ## _POS, \ |
| IWL_ ## sym ## _LEN, (v)) |
| |
| #define IWL_GET_BITS(s, sym) \ |
| iwl_get_bits((s).IWL_ ## sym ## _SYM, IWL_ ## sym ## _POS, \ |
| IWL_ ## sym ## _LEN) |
| |
| |
| #define KELVIN_TO_CELSIUS(x) ((x)-273) |
| #define CELSIUS_TO_KELVIN(x) ((x)+273) |
| |
| #define IEEE80211_CHAN_W_RADAR_DETECT 0x00000010 |
| |
| static inline struct ieee80211_conf *ieee80211_get_hw_conf( |
| struct ieee80211_hw *hw) |
| { |
| return &hw->conf; |
| } |
| |
| #define QOS_CONTROL_LEN 2 |
| |
| |
| static inline int ieee80211_is_management(u16 fc) |
| { |
| return (fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT; |
| } |
| |
| static inline int ieee80211_is_control(u16 fc) |
| { |
| return (fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL; |
| } |
| |
| static inline int ieee80211_is_data(u16 fc) |
| { |
| return (fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA; |
| } |
| |
| static inline int ieee80211_is_back_request(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BACK_REQ); |
| } |
| |
| static inline int ieee80211_is_probe_response(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP); |
| } |
| |
| static inline int ieee80211_is_probe_request(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_REQ); |
| } |
| |
| static inline int ieee80211_is_beacon(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON); |
| } |
| |
| static inline int ieee80211_is_atim(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ATIM); |
| } |
| |
| static inline int ieee80211_is_assoc_request(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ); |
| } |
| |
| static inline int ieee80211_is_assoc_response(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_RESP); |
| } |
| |
| static inline int ieee80211_is_auth(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ); |
| } |
| |
| static inline int ieee80211_is_deauth(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ); |
| } |
| |
| static inline int ieee80211_is_disassoc(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ); |
| } |
| |
| static inline int ieee80211_is_reassoc_request(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ); |
| } |
| |
| static inline int ieee80211_is_reassoc_response(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_RESP); |
| } |
| |
| static inline int ieee80211_is_qos_data(u16 fc) |
| { |
| return ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) && |
| ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_QOS_DATA); |
| } |
| /** |
| * ieee80211_get_qos_ctrl - get pointer to the QoS control field |
| * |
| * This function returns the pointer to 802.11 header QoS field (2 bytes) |
| * This function doesn't check whether hdr is a QoS hdr, use with care |
| * @hdr: struct ieee80211_hdr *hdr |
| * @hdr_len: header length |
| */ |
| |
| static inline u8 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr, int hdr_len) |
| { |
| return ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN); |
| } |
| |
| static inline int iwl_check_bits(unsigned long field, unsigned long mask) |
| { |
| return ((field & mask) == mask) ? 1 : 0; |
| } |
| |
| static inline unsigned long elapsed_jiffies(unsigned long start, |
| unsigned long end) |
| { |
| if (end >= start) |
| return end - start; |
| |
| return end + (MAX_JIFFY_OFFSET - start) + 1; |
| } |
| |
| static inline u8 iwl_get_dma_hi_address(dma_addr_t addr) |
| { |
| return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0; |
| } |
| |
| /** |
| * iwl_queue_inc_wrap - increment queue index, wrap back to beginning |
| * @index -- current index |
| * @n_bd -- total number of entries in queue (must be power of 2) |
| */ |
| static inline int iwl_queue_inc_wrap(int index, int n_bd) |
| { |
| return ++index & (n_bd - 1); |
| } |
| |
| /** |
| * iwl_queue_dec_wrap - decrement queue index, wrap back to end |
| * @index -- current index |
| * @n_bd -- total number of entries in queue (must be power of 2) |
| */ |
| static inline int iwl_queue_dec_wrap(int index, int n_bd) |
| { |
| return --index & (n_bd - 1); |
| } |
| |
| /* TODO: Move fw_desc functions to iwl-pci.ko */ |
| static inline void iwl_free_fw_desc(struct pci_dev *pci_dev, |
| struct fw_desc *desc) |
| { |
| if (desc->v_addr) |
| pci_free_consistent(pci_dev, desc->len, |
| desc->v_addr, desc->p_addr); |
| desc->v_addr = NULL; |
| desc->len = 0; |
| } |
| |
| static inline int iwl_alloc_fw_desc(struct pci_dev *pci_dev, |
| struct fw_desc *desc) |
| { |
| desc->v_addr = pci_alloc_consistent(pci_dev, desc->len, &desc->p_addr); |
| return (desc->v_addr != NULL) ? 0 : -ENOMEM; |
| } |
| |
| #endif /* __iwl_helpers_h__ */ |