1 /* 2 * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _DP_RX_DEFRAG_H 20 #define _DP_RX_DEFRAG_H 21 22 #include "hal_rx.h" 23 24 #ifdef CONFIG_MCL 25 #include <cds_ieee80211_common.h> 26 #else 27 #include <linux/ieee80211.h> 28 #endif 29 30 #define DEFRAG_IEEE80211_ADDR_LEN 6 31 #define DEFRAG_IEEE80211_KEY_LEN 8 32 #define DEFRAG_IEEE80211_FCS_LEN 4 33 34 #define DP_RX_DEFRAG_IEEE80211_ADDR_COPY(dst, src) \ 35 qdf_mem_copy(dst, src, IEEE80211_ADDR_LEN) 36 37 #define DP_RX_DEFRAG_IEEE80211_QOS_HAS_SEQ(wh) \ 38 (((wh) & \ 39 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_QOS)) == \ 40 (IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS)) 41 42 #define UNI_DESC_OWNER_SW 0x1 43 #define UNI_DESC_BUF_TYPE_RX_MSDU_LINK 0x6 44 /** 45 * struct dp_rx_defrag_cipher: structure to indicate cipher header 46 * @ic_name: Name 47 * @ic_header: header length 48 * @ic_trailer: trail length 49 * @ic_miclen: MIC length 50 */ 51 struct dp_rx_defrag_cipher { 52 const char *ic_name; 53 uint16_t ic_header; 54 uint8_t ic_trailer; 55 uint8_t ic_miclen; 56 }; 57 58 uint32_t dp_rx_frag_handle(struct dp_soc *soc, void *ring_desc, 59 struct hal_rx_mpdu_desc_info *mpdu_desc_info, 60 union dp_rx_desc_list_elem_t **head, 61 union dp_rx_desc_list_elem_t **tail, 62 uint32_t quota); 63 64 /* 65 * dp_rx_frag_get_mac_hdr() - Return pointer to the mac hdr 66 * @rx_desc_info: Pointer to the pkt_tlvs in the 67 * nbuf (pkt_tlvs->mac_hdr->data) 68 * 69 * It is inefficient to peek into the packet for received 70 * frames but these APIs are required to get to some of 71 * 802.11 fields that hardware does not populate in the 72 * rx meta data. 73 * 74 * Returns: pointer to ieee80211_frame 75 */ 76 static inline 77 struct ieee80211_frame *dp_rx_frag_get_mac_hdr(uint8_t *rx_desc_info) 78 { 79 int rx_desc_len = hal_rx_get_desc_len(); 80 return (struct ieee80211_frame *)(rx_desc_info + rx_desc_len); 81 } 82 83 /* 84 * dp_rx_frag_get_mpdu_seq_number() - Get mpdu sequence number 85 * @rx_desc_info: Pointer to the pkt_tlvs in the 86 * nbuf (pkt_tlvs->mac_hdr->data) 87 * 88 * Returns: uint16_t, rx sequence number 89 */ 90 static inline 91 uint16_t dp_rx_frag_get_mpdu_seq_number(uint8_t *rx_desc_info) 92 { 93 struct ieee80211_frame *mac_hdr; 94 mac_hdr = dp_rx_frag_get_mac_hdr(rx_desc_info); 95 96 return qdf_le16_to_cpu(*(uint16_t *) mac_hdr->i_seq) >> 97 IEEE80211_SEQ_SEQ_SHIFT; 98 } 99 100 /* 101 * dp_rx_frag_get_mpdu_frag_number() - Get mpdu fragment number 102 * @rx_desc_info: Pointer to the pkt_tlvs in the 103 * nbuf (pkt_tlvs->mac_hdr->data) 104 * 105 * Returns: uint8_t, receive fragment number 106 */ 107 static inline 108 uint8_t dp_rx_frag_get_mpdu_frag_number(uint8_t *rx_desc_info) 109 { 110 struct ieee80211_frame *mac_hdr; 111 mac_hdr = dp_rx_frag_get_mac_hdr(rx_desc_info); 112 113 return qdf_le16_to_cpu(*(uint16_t *) mac_hdr->i_seq) & 114 IEEE80211_SEQ_FRAG_MASK; 115 } 116 117 /* 118 * dp_rx_frag_get_more_frag_bit() - Get more fragment bit 119 * @rx_desc_info: Pointer to the pkt_tlvs in the 120 * nbuf (pkt_tlvs->mac_hdr->data) 121 * 122 * Returns: uint8_t, get more fragment bit 123 */ 124 static inline 125 uint8_t dp_rx_frag_get_more_frag_bit(uint8_t *rx_desc_info) 126 { 127 struct ieee80211_frame *mac_hdr; 128 mac_hdr = dp_rx_frag_get_mac_hdr(rx_desc_info); 129 130 return (mac_hdr->i_fc[1] & IEEE80211_FC1_MORE_FRAG) >> 2; 131 } 132 133 static inline 134 uint8_t dp_rx_get_pkt_dir(uint8_t *rx_desc_info) 135 { 136 struct ieee80211_frame *mac_hdr; 137 mac_hdr = dp_rx_frag_get_mac_hdr(rx_desc_info); 138 139 return mac_hdr->i_fc[1] & IEEE80211_FC1_DIR_MASK; 140 } 141 142 void dp_rx_defrag_waitlist_flush(struct dp_soc *soc); 143 void dp_rx_reorder_flush_frag(struct dp_peer *peer, 144 unsigned int tid); 145 void dp_rx_defrag_waitlist_remove(struct dp_peer *peer, unsigned tid); 146 void dp_rx_defrag_cleanup(struct dp_peer *peer, unsigned tid); 147 148 QDF_STATUS dp_rx_defrag_add_last_frag(struct dp_soc *soc, 149 struct dp_peer *peer, uint16_t tid, 150 uint16_t rxseq, qdf_nbuf_t nbuf); 151 #endif /* _DP_RX_DEFRAG_H */ 152