drivers/net/wireless/ath/wcn36xx/dxe.h

   1 /*
   2  * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #ifndef _DXE_H_
  18 #define _DXE_H_
  19
  20 #include "wcn36xx.h"
  21
  22 /*
  23 TX_LOW  = DMA0
  24 TX_HIGH = DMA4
  25 RX_LOW  = DMA1
  26 RX_HIGH = DMA3
  27 H2H_TEST_RX_TX = DMA2
  28 */
  29
  30 /* DXE registers */
  31 #define WCN36XX_DXE_MEM_REG                     0x202000
  32
  33 #define WCN36XX_DXE_CCU_INT                     0xA0011
  34 #define WCN36XX_DXE_REG_CCU_INT_3660            0x200b10
  35 #define WCN36XX_DXE_REG_CCU_INT_3680            0x2050dc
  36
  37 /* TODO This must calculated properly but not hardcoded */
  38 #define WCN36XX_DXE_CTRL_TX_L                   0x328a44
  39 #define WCN36XX_DXE_CTRL_TX_H                   0x32ce44
  40 #define WCN36XX_DXE_CTRL_RX_L                   0x12ad2f
  41 #define WCN36XX_DXE_CTRL_RX_H                   0x12d12f
  42 #define WCN36XX_DXE_CTRL_TX_H_BD                0x30ce45
  43 #define WCN36XX_DXE_CTRL_TX_H_SKB               0x32ce4d
  44 #define WCN36XX_DXE_CTRL_TX_L_BD                0x308a45
  45 #define WCN36XX_DXE_CTRL_TX_L_SKB               0x328a4d
  46
  47 /* TODO This must calculated properly but not hardcoded */
  48 #define WCN36XX_DXE_WQ_TX_L                     0x17
  49 #define WCN36XX_DXE_WQ_TX_H                     0x17
  50 #define WCN36XX_DXE_WQ_RX_L                     0xB
  51 #define WCN36XX_DXE_WQ_RX_H                     0x4
  52
  53 /* DXE descriptor control filed */
  54 #define WCN36XX_DXE_CTRL_VALID_MASK (0x00000001)
  55
  56 /* TODO This must calculated properly but not hardcoded */
  57 /* DXE default control register values */
  58 #define WCN36XX_DXE_CH_DEFAULT_CTL_RX_L         0x847EAD2F
  59 #define WCN36XX_DXE_CH_DEFAULT_CTL_RX_H         0x84FED12F
  60 #define WCN36XX_DXE_CH_DEFAULT_CTL_TX_H         0x853ECF4D
  61 #define WCN36XX_DXE_CH_DEFAULT_CTL_TX_L         0x843e8b4d
  62
  63 /* Common DXE registers */
  64 #define WCN36XX_DXE_MEM_CSR                     (WCN36XX_DXE_MEM_REG + 0x00)
  65 #define WCN36XX_DXE_REG_CSR_RESET               (WCN36XX_DXE_MEM_REG + 0x00)
  66 #define WCN36XX_DXE_ENCH_ADDR                   (WCN36XX_DXE_MEM_REG + 0x04)
  67 #define WCN36XX_DXE_REG_CH_EN                   (WCN36XX_DXE_MEM_REG + 0x08)
  68 #define WCN36XX_DXE_REG_CH_DONE                 (WCN36XX_DXE_MEM_REG + 0x0C)
  69 #define WCN36XX_DXE_REG_CH_ERR                  (WCN36XX_DXE_MEM_REG + 0x10)
  70 #define WCN36XX_DXE_INT_MASK_REG                (WCN36XX_DXE_MEM_REG + 0x18)
  71 #define WCN36XX_DXE_INT_SRC_RAW_REG             (WCN36XX_DXE_MEM_REG + 0x20)
  72         /* #define WCN36XX_DXE_INT_CH6_MASK     0x00000040 */
  73         /* #define WCN36XX_DXE_INT_CH5_MASK     0x00000020 */
  74         #define WCN36XX_DXE_INT_CH4_MASK        0x00000010
  75         #define WCN36XX_DXE_INT_CH3_MASK        0x00000008
  76         /* #define WCN36XX_DXE_INT_CH2_MASK     0x00000004 */
  77         #define WCN36XX_DXE_INT_CH1_MASK        0x00000002
  78         #define WCN36XX_DXE_INT_CH0_MASK        0x00000001
  79 #define WCN36XX_DXE_0_INT_CLR                   (WCN36XX_DXE_MEM_REG + 0x30)
  80 #define WCN36XX_DXE_0_INT_ED_CLR                (WCN36XX_DXE_MEM_REG + 0x34)
  81 #define WCN36XX_DXE_0_INT_DONE_CLR              (WCN36XX_DXE_MEM_REG + 0x38)
  82 #define WCN36XX_DXE_0_INT_ERR_CLR               (WCN36XX_DXE_MEM_REG + 0x3C)
  83
  84 #define WCN36XX_DXE_0_CH0_STATUS                (WCN36XX_DXE_MEM_REG + 0x404)
  85 #define WCN36XX_DXE_0_CH1_STATUS                (WCN36XX_DXE_MEM_REG + 0x444)
  86 #define WCN36XX_DXE_0_CH2_STATUS                (WCN36XX_DXE_MEM_REG + 0x484)
  87 #define WCN36XX_DXE_0_CH3_STATUS                (WCN36XX_DXE_MEM_REG + 0x4C4)
  88 #define WCN36XX_DXE_0_CH4_STATUS                (WCN36XX_DXE_MEM_REG + 0x504)
  89
  90 #define WCN36XX_DXE_REG_RESET                   0x5c89
  91
  92 /* Temporary BMU Workqueue 4 */
  93 #define WCN36XX_DXE_BMU_WQ_RX_LOW               0xB
  94 #define WCN36XX_DXE_BMU_WQ_RX_HIGH              0x4
  95 /* DMA channel offset */
  96 #define WCN36XX_DXE_TX_LOW_OFFSET               0x400
  97 #define WCN36XX_DXE_TX_HIGH_OFFSET              0x500
  98 #define WCN36XX_DXE_RX_LOW_OFFSET               0x440
  99 #define WCN36XX_DXE_RX_HIGH_OFFSET              0x4C0
 100
 101 /* Address of the next DXE descriptor */
 102 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR           0x001C
 103 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_L      (WCN36XX_DXE_MEM_REG + \
 104                                                  WCN36XX_DXE_TX_LOW_OFFSET + \
 105                                                  WCN36XX_DXE_CH_NEXT_DESC_ADDR)
 106 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_H      (WCN36XX_DXE_MEM_REG + \
 107                                                  WCN36XX_DXE_TX_HIGH_OFFSET + \
 108                                                  WCN36XX_DXE_CH_NEXT_DESC_ADDR)
 109 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_L      (WCN36XX_DXE_MEM_REG + \
 110                                                  WCN36XX_DXE_RX_LOW_OFFSET + \
 111                                                  WCN36XX_DXE_CH_NEXT_DESC_ADDR)
 112 #define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_H      (WCN36XX_DXE_MEM_REG + \
 113                                                  WCN36XX_DXE_RX_HIGH_OFFSET + \
 114                                                  WCN36XX_DXE_CH_NEXT_DESC_ADDR)
 115
 116 /* DXE Descriptor source address */
 117 #define WCN36XX_DXE_CH_SRC_ADDR                 0x000C
 118 #define WCN36XX_DXE_CH_SRC_ADDR_RX_L            (WCN36XX_DXE_MEM_REG + \
 119                                                  WCN36XX_DXE_RX_LOW_OFFSET + \
 120                                                  WCN36XX_DXE_CH_SRC_ADDR)
 121 #define WCN36XX_DXE_CH_SRC_ADDR_RX_H            (WCN36XX_DXE_MEM_REG + \
 122                                                  WCN36XX_DXE_RX_HIGH_OFFSET + \
 123                                                  WCN36XX_DXE_CH_SRC_ADDR)
 124
 125 /* DXE Descriptor address destination address */
 126 #define WCN36XX_DXE_CH_DEST_ADDR                0x0014
 127 #define WCN36XX_DXE_CH_DEST_ADDR_TX_L           (WCN36XX_DXE_MEM_REG + \
 128                                                  WCN36XX_DXE_TX_LOW_OFFSET + \
 129                                                  WCN36XX_DXE_CH_DEST_ADDR)
 130 #define WCN36XX_DXE_CH_DEST_ADDR_TX_H           (WCN36XX_DXE_MEM_REG + \
 131                                                  WCN36XX_DXE_TX_HIGH_OFFSET + \
 132                                                  WCN36XX_DXE_CH_DEST_ADDR)
 133 #define WCN36XX_DXE_CH_DEST_ADDR_RX_L           (WCN36XX_DXE_MEM_REG + \
 134                                                  WCN36XX_DXE_RX_LOW_OFFSET + \
 135                                                  WCN36XX_DXE_CH_DEST_ADDR)
 136 #define WCN36XX_DXE_CH_DEST_ADDR_RX_H           (WCN36XX_DXE_MEM_REG + \
 137                                                  WCN36XX_DXE_RX_HIGH_OFFSET + \
 138                                                  WCN36XX_DXE_CH_DEST_ADDR)
 139
 140 /* Interrupt status */
 141 #define WCN36XX_DXE_CH_STATUS_REG_ADDR          0x0004
 142 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_L     (WCN36XX_DXE_MEM_REG + \
 143                                                  WCN36XX_DXE_TX_LOW_OFFSET + \
 144                                                  WCN36XX_DXE_CH_STATUS_REG_ADDR)
 145 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_H     (WCN36XX_DXE_MEM_REG + \
 146                                                  WCN36XX_DXE_TX_HIGH_OFFSET + \
 147                                                  WCN36XX_DXE_CH_STATUS_REG_ADDR)
 148 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_L     (WCN36XX_DXE_MEM_REG + \
 149                                                  WCN36XX_DXE_RX_LOW_OFFSET + \
 150                                                  WCN36XX_DXE_CH_STATUS_REG_ADDR)
 151 #define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_H     (WCN36XX_DXE_MEM_REG + \
 152                                                  WCN36XX_DXE_RX_HIGH_OFFSET + \
 153                                                  WCN36XX_DXE_CH_STATUS_REG_ADDR)
 154
 155
 156 /* DXE default control register */
 157 #define WCN36XX_DXE_REG_CTL_RX_L                (WCN36XX_DXE_MEM_REG + \
 158                                                  WCN36XX_DXE_RX_LOW_OFFSET)
 159 #define WCN36XX_DXE_REG_CTL_RX_H                (WCN36XX_DXE_MEM_REG + \
 160                                                  WCN36XX_DXE_RX_HIGH_OFFSET)
 161 #define WCN36XX_DXE_REG_CTL_TX_H                (WCN36XX_DXE_MEM_REG + \
 162                                                  WCN36XX_DXE_TX_HIGH_OFFSET)
 163 #define WCN36XX_DXE_REG_CTL_TX_L                (WCN36XX_DXE_MEM_REG + \
 164                                                  WCN36XX_DXE_TX_LOW_OFFSET)
 165
 166 #define WCN36XX_SMSM_WLAN_TX_ENABLE             0x00000400
 167 #define WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY        0x00000200
 168
 169
 170 /* Interrupt control channel mask */
 171 #define WCN36XX_INT_MASK_CHAN_TX_L              0x00000001
 172 #define WCN36XX_INT_MASK_CHAN_RX_L              0x00000002
 173 #define WCN36XX_INT_MASK_CHAN_RX_H              0x00000008
 174 #define WCN36XX_INT_MASK_CHAN_TX_H              0x00000010
 175
 176 #define WCN36XX_BD_CHUNK_SIZE                   128
 177
 178 #define WCN36XX_PKT_SIZE                        0xF20
 179 enum wcn36xx_dxe_ch_type {
 180         WCN36XX_DXE_CH_TX_L,
 181         WCN36XX_DXE_CH_TX_H,
 182         WCN36XX_DXE_CH_RX_L,
 183         WCN36XX_DXE_CH_RX_H
 184 };
 185
 186 /* amount of descriptors per channel */
 187 enum wcn36xx_dxe_ch_desc_num {
 188         WCN36XX_DXE_CH_DESC_NUMB_TX_L           = 128,
 189         WCN36XX_DXE_CH_DESC_NUMB_TX_H           = 10,
 190         WCN36XX_DXE_CH_DESC_NUMB_RX_L           = 512,
 191         WCN36XX_DXE_CH_DESC_NUMB_RX_H           = 40
 192 };
 193
 194 /**
 195  * struct wcn36xx_dxe_desc - describes descriptor of one DXE buffer
 196  *
 197  * @ctrl: is a union that consists of following bits:
 198  * union {
 199  *      u32     valid           :1; //0 = DMA stop, 1 = DMA continue with this
 200  *                                  //descriptor
 201  *      u32     transfer_type   :2; //0 = Host to Host space
 202  *      u32     eop             :1; //End of Packet
 203  *      u32     bd_handling     :1; //if transferType = Host to BMU, then 0
 204  *                                  // means first 128 bytes contain BD, and 1
 205  *                                  // means create new empty BD
 206  *      u32     siq             :1; // SIQ
 207  *      u32     diq             :1; // DIQ
 208  *      u32     pdu_rel         :1; //0 = don't release BD and PDUs when done,
 209  *                                  // 1 = release them
 210  *      u32     bthld_sel       :4; //BMU Threshold Select
 211  *      u32     prio            :3; //Specifies the priority level to use for
 212  *                                  // the transfer
 213  *      u32     stop_channel    :1; //1 = DMA stops processing further, channel
 214  *                                  //requires re-enabling after this
 215  *      u32     intr            :1; //Interrupt on Descriptor Done
 216  *      u32     rsvd            :1; //reserved
 217  *      u32     size            :14;//14 bits used - ignored for BMU transfers,
 218  *                                  //only used for host to host transfers?
 219  * } ctrl;
 220  */
 221 struct wcn36xx_dxe_desc {
 222         u32     ctrl;
 223         u32     fr_len;
 224
 225         u32     src_addr_l;
 226         u32     dst_addr_l;
 227         u32     phy_next_l;
 228         u32     src_addr_h;
 229         u32     dst_addr_h;
 230         u32     phy_next_h;
 231 } __packed;
 232
 233 /* DXE Control block */
 234 struct wcn36xx_dxe_ctl {
 235         struct wcn36xx_dxe_ctl  *next;
 236         struct wcn36xx_dxe_desc *desc;
 237         unsigned int            desc_phy_addr;
 238         int                     ctl_blk_order;
 239         struct sk_buff          *skb;
 240         spinlock_t              skb_lock;
 241         void                    *bd_cpu_addr;
 242         dma_addr_t              bd_phy_addr;
 243 };
 244
 245 struct wcn36xx_dxe_ch {
 246         enum wcn36xx_dxe_ch_type        ch_type;
 247         void                            *cpu_addr;
 248         dma_addr_t                      dma_addr;
 249         enum wcn36xx_dxe_ch_desc_num    desc_num;
 250         /* DXE control block ring */
 251         struct wcn36xx_dxe_ctl          *head_blk_ctl;
 252         struct wcn36xx_dxe_ctl          *tail_blk_ctl;
 253
 254         /* DXE channel specific configs */
 255         u32                             dxe_wq;
 256         u32                             ctrl_bd;
 257         u32                             ctrl_skb;
 258         u32                             reg_ctrl;
 259         u32                             def_ctrl;
 260 };
 261
 262 /* Memory Pool for BD headers */
 263 struct wcn36xx_dxe_mem_pool {
 264         int             chunk_size;
 265         void            *virt_addr;
 266         dma_addr_t      phy_addr;
 267 };
 268
 269 struct wcn36xx_vif;
 270 int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn);
 271 void wcn36xx_dxe_free_mem_pools(struct wcn36xx *wcn);
 272 void wcn36xx_dxe_rx_frame(struct wcn36xx *wcn);
 273 int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn);
 274 void wcn36xx_dxe_free_ctl_blks(struct wcn36xx *wcn);
 275 int wcn36xx_dxe_init(struct wcn36xx *wcn);
 276 void wcn36xx_dxe_deinit(struct wcn36xx *wcn);
 277 int wcn36xx_dxe_init_channels(struct wcn36xx *wcn);
 278 int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
 279                          struct wcn36xx_vif *vif_priv,
 280                          struct sk_buff *skb,
 281                          bool is_low);
 282 void wcn36xx_dxe_tx_ack_ind(struct wcn36xx *wcn, u32 status);
 283 void *wcn36xx_dxe_get_next_bd(struct wcn36xx *wcn, bool is_low);
 284 #endif  /* _DXE_H_ */