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Ralink Mt7620 MgmtRing Full 󱯹󰴅

󱯹󰴅󱯹󰴅

󱯹󰴅

380939960@qq.com 2015-09-29

 MT7620 󱯹󳍤󱪦󱪝󳔼󱾀󳖼󳭣󳸍

 󰦑󳅚󳍤󱪦󱯹 SSID

 󰮤󰟀󰲯󰞋󲕺 WIFI client 󰭕󱉊󳕓󰤚

 󱃙󰭫󰱾󱯹󰟈󰗤

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=254!

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=255!

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=256!

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=257!

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=258!

Qidx(0), not enough space in MgmtRing, MgmtRingFullCount=259!

 󱃙󰭫󲙲󱪝”iwpriv ra0 set Channel=xx”󰣗 channel 󱱭󰅮󳘘󰡚󰢙󱯹 channel󰄗󰞬󲁤󰆦󳕓󰤚



󰟳󲙲󱯹󲽘󱉊󳳗󰆒󳅊󱐅󱵶󱯹󲽇󰐛󰳚󰴅󱤥󳳗󰟈󱯹

1. WIFI Driver 󰐊󰆷󱷡󳭩

󰐊󰆷󱷡󳭩󰐊󰆷󱷡󳭩

󰐊󰆷󱷡󳭩󳕐󲷁

󳕐󲷁󳕐󲷁

󳕐󲷁󰫥󰣣󳖇

󰫥󰣣󳖇󰫥󰣣󳖇

󰫥󰣣󳖇

󳭺󳅰󱐅󱵶󰞆󱤥WIFI driver 󱯹 TX/RX 󰐊󰆷󱷡󳭩󳖏󳔼 DMA 󱯹󰬮󰒄󳕐󲷁󰫥󰣣󰣗

 󰃍 6  TX queue1  RX queueTX5 󰮤 mgmt ring󰆦󰮤󱪝 WIFI 󲄖󱥻󰎜󱯹󳔈TX0  TX4 󰮤󲇰󱯹 TX ring󱪝󳳓󲄖󱥻󰎜󲇰󰫥󰣣

󱯹󳔈

 Ring buffer 󱯹󰃍󱪦 WIFI 󳿦󳛂

 driver 󳊔󳊘󰅻󳱵󲻶󳔈󱯹󰫥󰣣 ring buffer󰏫󰪮 ring buffer 󱯹󰡼󳧽󰱩󰐊󰆷󱯹󱷡 ring buffer 󳅰󰫥󰣣󰏫󳕶󱿯󰭫󰪮 ring buffer

󱯹󳅰󰡼󳧽

 ring buffer 󱯹󳅰/󰡼󳧽 ring buffer 󰆄ring buffer 󲂾 ring buffer 󰥄󳕥󰗤󳖏󳔼󱱭󰐉󱯹󰄹󰃍 driver 󰆷󱷡󳭩󳖇

󰅮󰐉󱯹󰄹󰃍󰞵󱺯





 TX5 󰮤

󰮤󰮤

󰮤 mgmt ring



TX0 



 TX4 󰮤󲇰󰫥󰣣󱯹

󰮤󲇰󰫥󰣣󱯹󰮤󲇰󰫥󰣣󱯹

󰮤󲇰󰫥󰣣󱯹 TX ring





TX_BASE_PTR_n 󰅮󰐉󱯹󰮤 TXn 󰅮󰐉󱯹󰫥󰣣󲑈󰳹 RTMP_TX_RING󰞋󲕺 RTMP_MGMT_RING Cell[0].AllocPa󰆦󰮤 ring buffer 󲂡 buffer 󱯹

TX_CTX_IDX_n 󰅮󰐉󱯹󰮤 TXn 󰅮󰐉󱯹󰫥󰣣󲑈󰳹 RTMP_TX_RING󰞋󲕺 RTMP_MGMT_RING TxCpuIdx󰮤 driver 󱪝󱯹 ring buffer 󱯹󰡼󳧽󱪦 WIFI driver 󰪮

TX_DTX_IDX_n 󰅮󰐉󱯹󰮤 TXn 󰅮󰐉󱯹󰫥󰣣󲑈󰳹 RTMP_TX_RING󰞋󲕺 RTMP_MGMT_RING TxDmaIdx󰮤󰐊󰆷󱷡󱪝󱯹 ring buffer 󱯹󳅰󰡼󳧽 󱪦󰐊󰆷󱷡󰪮

TX_MAX_CNT_n 󰅮󰐉󱯹󰮤 TXn 󰅮󰐉󱯹󰫥󰣣󲑈󰳹 RTMP_TX_RING󰞋󲕺 RTMP_MGMT_RING󱯹 TX_RING_SIZE󲑎 ring buffer 󰞅󰫥

typedef struct _RTMP_TX_RING {

RTMP_DMACB Cell[TX_RING_SIZE];

UINT32 TxCpuIdx;

UINT32 TxDmaIdx;

UINT32 TxSwFreeIdx; /* software next free tx index */

} RTMP_TX_RING, *PRTMP_TX_RING;

TX_BASE_PTR_n  TX_MAX_CNT_n 󱪝 interface up 󰭫󳄳󲓣󳳗󳱵󲻶󳄳󲓣󲖁 TX_CTX_IDX_n  TX_DTX_IDX_n 󳕅󲷁󳔼󱾀󰕶󱪝󲑩󰡶 ring

buffer 󰱾󰐄󰍚

RTMP_TX_RING 󰆦󰮤 driver 󰐊󰆷󱷡󰣗󰫥󰣣󱯹 ring buffer󰓈 driver  ring buffer 󰎜󰃸󰆦󰱩󰬥 TxCpuIdx󰅮󰐉󱯹󰄹󰃍 TX_CTX_IDX_n󰐊󰆷󱷡

 ring buffer 󳅰󰫥󰣣󳅰󰄁󰫥󰣣󰐊󰆷󱷡󰱩󰬥 TxDmaIdx󰅮󰐉󱯹󰄹󰃍 TX_DTX_IDX_n

󳘘 driver 󰐊󰆷󱷡󳔈󰎜󰭫󳱵󲻶󰗤󳘘󰟀

MT7620 PROGRAMMING GUIDE

󰱾󱯹󰥄󳕥

Tx/Rx Descriptors and Wireless Information

Tx Descriptors and Frame Information

To transmit a frame, the driver needs to prepare the Tx frame information for hardware. The Tx frame information contains the

transmission control, the header, and the payload. The transmission control information (TXWI) is used by the MAC and BBP and

is applied to the associated Tx frame on transmission. The header and payload is the content of an 802.11 packet.

The Tx information may be divided into several segments. The Tx descriptor (TXD) specifies the location and length of the Tx

frame information segments. Tx frame information may be linked by use of several TXD. These TXD are arranged in a TXD ring in

serial.

The diagram below illustrates the relationship between TXD and Tx frame information.

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xinyimingming

2017-03-14

讲解不是很详细，不会还是可以参考的。

Ralink_mt7620_MgmtRing_Full

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