drivers/net/wireless/intel/iwlwifi/queue/tx.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
   2 /*
   3  * Copyright (C) 2020 Intel Corporation
   4  */
   5 #ifndef __iwl_trans_queue_tx_h__
   6 #define __iwl_trans_queue_tx_h__
   7 #include "iwl-fh.h"
   8 #include "fw/api/tx.h"
   9
  10 struct iwl_tso_hdr_page {
  11         struct page *page;
  12         u8 *pos;
  13 };
  14
  15 static inline dma_addr_t
  16 iwl_txq_get_first_tb_dma(struct iwl_txq *txq, int idx)
  17 {
  18         return txq->first_tb_dma +
  19                sizeof(struct iwl_pcie_first_tb_buf) * idx;
  20 }
  21
  22 static inline u16 iwl_txq_get_cmd_index(const struct iwl_txq *q, u32 index)
  23 {
  24         return index & (q->n_window - 1);
  25 }
  26
  27 void iwl_txq_gen2_unmap(struct iwl_trans *trans, int txq_id);
  28
  29 static inline void iwl_wake_queue(struct iwl_trans *trans,
  30                                   struct iwl_txq *txq)
  31 {
  32         if (test_and_clear_bit(txq->id, trans->txqs.queue_stopped)) {
  33                 IWL_DEBUG_TX_QUEUES(trans, "Wake hwq %d\n", txq->id);
  34                 iwl_op_mode_queue_not_full(trans->op_mode, txq->id);
  35         }
  36 }
  37
  38 static inline void *iwl_txq_get_tfd(struct iwl_trans *trans,
  39                                     struct iwl_txq *txq, int idx)
  40 {
  41         if (trans->trans_cfg->use_tfh)
  42                 idx = iwl_txq_get_cmd_index(txq, idx);
  43
  44         return txq->tfds + trans->txqs.tfd.size * idx;
  45 }
  46
  47 int iwl_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,
  48                   bool cmd_queue);
  49 /*
  50  * We need this inline in case dma_addr_t is only 32-bits - since the
  51  * hardware is always 64-bit, the issue can still occur in that case,
  52  * so use u64 for 'phys' here to force the addition in 64-bit.
  53  */
  54 static inline bool iwl_txq_crosses_4g_boundary(u64 phys, u16 len)
  55 {
  56         return upper_32_bits(phys) != upper_32_bits(phys + len);
  57 }
  58
  59 int iwl_txq_space(struct iwl_trans *trans, const struct iwl_txq *q);
  60
  61 static inline void iwl_txq_stop(struct iwl_trans *trans, struct iwl_txq *txq)
  62 {
  63         if (!test_and_set_bit(txq->id, trans->txqs.queue_stopped)) {
  64                 iwl_op_mode_queue_full(trans->op_mode, txq->id);
  65                 IWL_DEBUG_TX_QUEUES(trans, "Stop hwq %d\n", txq->id);
  66         } else {
  67                 IWL_DEBUG_TX_QUEUES(trans, "hwq %d already stopped\n",
  68                                     txq->id);
  69         }
  70 }
  71
  72 /**
  73  * iwl_txq_inc_wrap - increment queue index, wrap back to beginning
  74  * @index -- current index
  75  */
  76 static inline int iwl_txq_inc_wrap(struct iwl_trans *trans, int index)
  77 {
  78         return ++index &
  79                 (trans->trans_cfg->base_params->max_tfd_queue_size - 1);
  80 }
  81
  82 /**
  83  * iwl_txq_dec_wrap - decrement queue index, wrap back to end
  84  * @index -- current index
  85  */
  86 static inline int iwl_txq_dec_wrap(struct iwl_trans *trans, int index)
  87 {
  88         return --index &
  89                 (trans->trans_cfg->base_params->max_tfd_queue_size - 1);
  90 }
  91
  92 static inline bool iwl_txq_used(const struct iwl_txq *q, int i)
  93 {
  94         int index = iwl_txq_get_cmd_index(q, i);
  95         int r = iwl_txq_get_cmd_index(q, q->read_ptr);
  96         int w = iwl_txq_get_cmd_index(q, q->write_ptr);
  97
  98         return w >= r ?
  99                 (index >= r && index < w) :
 100                 !(index < r && index >= w);
 101 }
 102
 103 void iwl_txq_free_tso_page(struct iwl_trans *trans, struct sk_buff *skb);
 104
 105 void iwl_txq_log_scd_error(struct iwl_trans *trans, struct iwl_txq *txq);
 106
 107 int iwl_txq_gen2_set_tb(struct iwl_trans *trans,
 108                         struct iwl_tfh_tfd *tfd, dma_addr_t addr,
 109                         u16 len);
 110
 111 void iwl_txq_gen2_tfd_unmap(struct iwl_trans *trans,
 112                             struct iwl_cmd_meta *meta,
 113                             struct iwl_tfh_tfd *tfd);
 114
 115 int iwl_txq_dyn_alloc(struct iwl_trans *trans,
 116                       __le16 flags, u8 sta_id, u8 tid,
 117                       int cmd_id, int size,
 118                       unsigned int timeout);
 119
 120 int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 121                     struct iwl_device_tx_cmd *dev_cmd, int txq_id);
 122
 123 void iwl_txq_dyn_free(struct iwl_trans *trans, int queue);
 124 void iwl_txq_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
 125 void iwl_txq_inc_wr_ptr(struct iwl_trans *trans, struct iwl_txq *txq);
 126 void iwl_txq_gen2_tx_stop(struct iwl_trans *trans);
 127 void iwl_txq_gen2_tx_free(struct iwl_trans *trans);
 128 int iwl_txq_init(struct iwl_trans *trans, struct iwl_txq *txq, int slots_num,
 129                  bool cmd_queue);
 130 int iwl_txq_gen2_init(struct iwl_trans *trans, int txq_id, int queue_size);
 131 #ifdef CONFIG_INET
 132 struct iwl_tso_hdr_page *get_page_hdr(struct iwl_trans *trans, size_t len,
 133                                       struct sk_buff *skb);
 134 #endif
 135 static inline u8 iwl_txq_gen1_tfd_get_num_tbs(struct iwl_trans *trans,
 136                                               void *_tfd)
 137 {
 138         struct iwl_tfd *tfd;
 139
 140         if (trans->trans_cfg->use_tfh) {
 141                 struct iwl_tfh_tfd *tfd = _tfd;
 142
 143                 return le16_to_cpu(tfd->num_tbs) & 0x1f;
 144         }
 145
 146         tfd = (struct iwl_tfd *)_tfd;
 147         return tfd->num_tbs & 0x1f;
 148 }
 149
 150 static inline u16 iwl_txq_gen1_tfd_tb_get_len(struct iwl_trans *trans,
 151                                               void *_tfd, u8 idx)
 152 {
 153         struct iwl_tfd *tfd;
 154         struct iwl_tfd_tb *tb;
 155
 156         if (trans->trans_cfg->use_tfh) {
 157                 struct iwl_tfh_tfd *tfd = _tfd;
 158                 struct iwl_tfh_tb *tb = &tfd->tbs[idx];
 159
 160                 return le16_to_cpu(tb->tb_len);
 161         }
 162
 163         tfd = (struct iwl_tfd *)_tfd;
 164         tb = &tfd->tbs[idx];
 165
 166         return le16_to_cpu(tb->hi_n_len) >> 4;
 167 }
 168
 169 void iwl_txq_gen1_tfd_unmap(struct iwl_trans *trans,
 170                             struct iwl_cmd_meta *meta,
 171                             struct iwl_txq *txq, int index);
 172 void iwl_txq_gen1_inval_byte_cnt_tbl(struct iwl_trans *trans,
 173                                      struct iwl_txq *txq);
 174 void iwl_txq_gen1_update_byte_cnt_tbl(struct iwl_trans *trans,
 175                                       struct iwl_txq *txq, u16 byte_cnt,
 176                                       int num_tbs);
 177 void iwl_txq_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
 178                      struct sk_buff_head *skbs);
 179 void iwl_txq_set_q_ptrs(struct iwl_trans *trans, int txq_id, int ptr);
 180 void iwl_trans_txq_freeze_timer(struct iwl_trans *trans, unsigned long txqs,
 181                                 bool freeze);
 182 void iwl_txq_progress(struct iwl_txq *txq);
 183 void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq);
 184 #endif /* __iwl_trans_queue_tx_h__ */