/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _DXE_H_
#define _DXE_H_
#include "wcn36xx.h"
/*
TX_LOW = DMA0
TX_HIGH = DMA4
RX_LOW = DMA1
RX_HIGH = DMA3
H2H_TEST_RX_TX = DMA2
*/
/* DXE registers */
#define WCN36XX_DXE_MEM_REG 0
#define WCN36XX_CCU_DXE_INT_SELECT_RIVA 0x310
#define WCN36XX_CCU_DXE_INT_SELECT_PRONTO 0x10dc
/* TODO This must calculated properly but not hardcoded */
#define WCN36XX_DXE_CTRL_TX_L 0x328a44
#define WCN36XX_DXE_CTRL_TX_H 0x32ce44
#define WCN36XX_DXE_CTRL_RX_L 0x12ad2f
#define WCN36XX_DXE_CTRL_RX_H 0x12d12f
#define WCN36XX_DXE_CTRL_TX_H_BD 0x30ce45
#define WCN36XX_DXE_CTRL_TX_H_SKB 0x32ce4d
#define WCN36XX_DXE_CTRL_TX_L_BD 0x308a45
#define WCN36XX_DXE_CTRL_TX_L_SKB 0x328a4d
/* TODO This must calculated properly but not hardcoded */
#define WCN36XX_DXE_WQ_TX_L 0x17
#define WCN36XX_DXE_WQ_TX_H 0x17
#define WCN36XX_DXE_WQ_RX_L 0xB
#define WCN36XX_DXE_WQ_RX_H 0x4
/* DXE descriptor control filed */
#define WCN36XX_DXE_CTRL_VALID_MASK (0x00000001)
/* TODO This must calculated properly but not hardcoded */
/* DXE default control register values */
#define WCN36XX_DXE_CH_DEFAULT_CTL_RX_L 0x847EAD2F
#define WCN36XX_DXE_CH_DEFAULT_CTL_RX_H 0x84FED12F
#define WCN36XX_DXE_CH_DEFAULT_CTL_TX_H 0x853ECF4D
#define WCN36XX_DXE_CH_DEFAULT_CTL_TX_L 0x843e8b4d
/* Common DXE registers */
#define WCN36XX_DXE_MEM_CSR (WCN36XX_DXE_MEM_REG + 0x00)
#define WCN36XX_DXE_REG_CSR_RESET (WCN36XX_DXE_MEM_REG + 0x00)
#define WCN36XX_DXE_ENCH_ADDR (WCN36XX_DXE_MEM_REG + 0x04)
#define WCN36XX_DXE_REG_CH_EN (WCN36XX_DXE_MEM_REG + 0x08)
#define WCN36XX_DXE_REG_CH_DONE (WCN36XX_DXE_MEM_REG + 0x0C)
#define WCN36XX_DXE_REG_CH_ERR (WCN36XX_DXE_MEM_REG + 0x10)
#define WCN36XX_DXE_INT_MASK_REG (WCN36XX_DXE_MEM_REG + 0x18)
#define WCN36XX_DXE_INT_SRC_RAW_REG (WCN36XX_DXE_MEM_REG + 0x20)
/* #define WCN36XX_DXE_INT_CH6_MASK 0x00000040 */
/* #define WCN36XX_DXE_INT_CH5_MASK 0x00000020 */
#define WCN36XX_DXE_INT_CH4_MASK 0x00000010
#define WCN36XX_DXE_INT_CH3_MASK 0x00000008
/* #define WCN36XX_DXE_INT_CH2_MASK 0x00000004 */
#define WCN36XX_DXE_INT_CH1_MASK 0x00000002
#define WCN36XX_DXE_INT_CH0_MASK 0x00000001
#define WCN36XX_DXE_0_INT_CLR (WCN36XX_DXE_MEM_REG + 0x30)
#define WCN36XX_DXE_0_INT_ED_CLR (WCN36XX_DXE_MEM_REG + 0x34)
#define WCN36XX_DXE_0_INT_DONE_CLR (WCN36XX_DXE_MEM_REG + 0x38)
#define WCN36XX_DXE_0_INT_ERR_CLR (WCN36XX_DXE_MEM_REG + 0x3C)
#define WCN36XX_DXE_0_CH0_STATUS (WCN36XX_DXE_MEM_REG + 0x404)
#define WCN36XX_DXE_0_CH1_STATUS (WCN36XX_DXE_MEM_REG + 0x444)
#define WCN36XX_DXE_0_CH2_STATUS (WCN36XX_DXE_MEM_REG + 0x484)
#define WCN36XX_DXE_0_CH3_STATUS (WCN36XX_DXE_MEM_REG + 0x4C4)
#define WCN36XX_DXE_0_CH4_STATUS (WCN36XX_DXE_MEM_REG + 0x504)
#define WCN36XX_DXE_REG_RESET 0x5c89
/* Temporary BMU Workqueue 4 */
#define WCN36XX_DXE_BMU_WQ_RX_LOW 0xB
#define WCN36XX_DXE_BMU_WQ_RX_HIGH 0x4
/* DMA channel offset */
#define WCN36XX_DXE_TX_LOW_OFFSET 0x400
#define WCN36XX_DXE_TX_HIGH_OFFSET 0x500
#define WCN36XX_DXE_RX_LOW_OFFSET 0x440
#define WCN36XX_DXE_RX_HIGH_OFFSET 0x4C0
/* Address of the next DXE descriptor */
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR 0x001C
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
/* DXE Descriptor source address */
#define WCN36XX_DXE_CH_SRC_ADDR 0x000C
#define WCN36XX_DXE_CH_SRC_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_SRC_ADDR)
#define WCN36XX_DXE_CH_SRC_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_SRC_ADDR)
/* DXE Descriptor address destination address */
#define WCN36XX_DXE_CH_DEST_ADDR 0x0014
#define WCN36XX_DXE_CH_DEST_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
/* Interrupt status */
#define WCN36XX_DXE_CH_STATUS_REG_ADDR 0x0004
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
/* DXE default control register */
#define WCN36XX_DXE_REG_CTL_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET)
#define WCN36XX_DXE_REG_CTL_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET)
#define WCN36XX_DXE_REG_CTL_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET)
#define WCN36XX_DXE_REG_CTL_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET)
#define WCN36XX_SMSM_WLAN_TX_ENABLE 0x00000400
#define WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY 0x00000200
/* Interrupt control channel mask */
#define WCN36XX_INT_MASK_CHAN_TX_L 0x00000001
#define WCN36XX_INT_MASK_CHAN_RX_L 0x00000002
#define WCN36XX_INT_MASK_CHAN_RX_H 0x00000008
#define WCN36XX_INT_MASK_CHAN_TX_H 0x00000010
#define WCN36XX_BD_CHUNK_SIZE 128
#define WCN36XX_PKT_SIZE 0xF20
enum wcn36xx_dxe_ch_type {
WCN36XX_DXE_CH_TX_L,
WCN36XX_DXE_CH_TX_H,
WCN36XX_DXE_CH_RX_L,
WCN36XX_DXE_CH_RX_H
};
/* amount of descriptors per channel */
enum wcn36xx_dxe_ch_desc_num {
WCN36XX_DXE_CH_DESC_NUMB_TX_L = 128,
WCN36XX_DXE_CH_DESC_NUMB_TX_H = 10,
WCN36XX_DXE_CH_DESC_NUMB_RX_L = 512,
WCN36XX_DXE_CH_DESC_NUMB_RX_H = 40
};
/**
* struct wcn36xx_dxe_desc - describes descriptor of one DXE buffer
*
* @ctrl: is a union that consists of following bits:
* union {
* u32 valid :1; //0 = DMA stop, 1 = DMA continue with this
* //descriptor
* u32 transfer_type :2; //0 = Host to Host space
* u32 eop :1; //End of Packet
* u32 bd_handling :1; //if transferType = Host to BMU, then 0
* // means first 128 bytes contain BD, and 1
* // means create new empty BD
* u32 siq :1; // SIQ
* u32 diq :1; // DIQ
* u32 pdu_rel :1; //0 = don't release BD and PDUs when done,
* // 1 = release them
* u32 bthld_sel :4; //BMU Threshold Select
* u32 prio :3; //Specifies the priority level to use for
* // the transfer
* u32 stop_channel :1; //1 = DMA stops processing further, channel
* //requires re-enabling after this
* u32 intr :1; //Interrupt on Descriptor Done
* u32 rsvd :1; //reserved
* u32 size :14;//14 bits used - ignored for BMU transfers,
* //only used for host to host transfers?
* } ctrl;
*/
struct wcn36xx_dxe_desc {
u32 ctrl;
u32 fr_len;
u32 src_addr_l;
u32 dst_addr_l;
u32 phy_next_l;
u32 src_addr_h;
u32 dst_addr_h;
u32 phy_next_h;
} __packed;
/* DXE Control block */
struct wcn36xx_dxe_ctl {
struct wcn36xx_dxe_ctl *next;
struct wcn36xx_dxe_desc *desc;
unsigned int desc_phy_addr;
int ctl_blk_order;
struct sk_buff *skb;
spinlock_t skb_lock;
void *bd_cpu_addr;
dma_addr_t bd_phy_addr;
};
struct wcn36xx_dxe_ch {
spinlock_t lock; /* protects head/tail ptrs */
enum wcn36xx_dxe_ch_type ch_type;
void *cpu_addr;
dma_addr_t dma_addr;
enum wcn36xx_dxe_ch_desc_num desc_num;
/* DXE control block ring */
struct wcn36xx_dxe_ctl *head_blk_ctl;
struct wcn36xx_dxe_ctl *tail_blk_ctl;
/* DXE channel specific configs */
u32 dxe_wq;
u32 ctrl_bd;
u32 ctrl_skb;
u32 reg_ctrl;
u32 def_ctrl;
};
/* Memory Pool for BD headers */
struct wcn36xx_dxe_mem_pool {
int chunk_size;
void *virt_addr;
dma_addr_t phy_addr;
};
struct wcn36xx_vif;
int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn);
void wcn36xx_dxe_free_mem_pools(struct wcn36xx *wcn);
void wcn36xx_dxe_rx_frame(struct wcn36xx *wcn);
int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn);
void wcn36xx_dxe_free_ctl_blks(struct wcn36xx *wcn);
int wcn36xx_dxe_init(struct wcn36xx *wcn);
void wcn36xx_dxe_deinit(struct wcn36xx *wcn);
int wcn36xx_dxe_init_channels(struct wcn36xx *wcn);
int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
struct wcn36xx_vif *vif_priv,
struct sk_buff *skb,
bool is_low);
void wcn36xx_dxe_tx_ack_ind(struct wcn36xx *wcn, u32 status);
void *wcn36xx_dxe_get_next_bd(struct wcn36xx *wcn, bool is_low);
#endif /* _DXE_H_ */