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rt2x00: Optimize TX descriptor handling

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HT and no-HT rt2x00 devices use a partly different TX descriptor.
Optimize the tx desciptor memory layout by putting the PLCP and HT
substructs into a union and introduce a new driver flag to decide which
TX desciptor format is used by the device.

This saves us the expensive PLCP calculation fOr HT devices and the HT
descriptor setup on no-HT devices.

Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Helmut Schaa
2011-03-03 19:42:35 +01:00
committed by John W. Linville
parent 7fe7ee7776
commit 26a1d07f41
12 changed files with 78 additions and 54 deletions
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25
drivers/net/wireless/rt2x00/rt2x00queue.h
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@@ -305,20 +305,27 @@ struct txentry_desc {
u16 length;
u16 header_length;
u16 length_high;
u16 length_low;
u16 signal;
u16 service;
union {
struct {
u16 length_high;
u16 length_low;
u16 signal;
u16 service;
} plcp;
struct {
u16 mcs;
u16 stbc;
u16 ba_size;
u16 mpdu_density;
short txop;
} ht;
} u;
u16 mcs;
u16 stbc;
u16 ba_size;
u16 rate_mode;
u16 mpdu_density;
short retry_limit;
short ifs;
short txop;
enum cipher cipher;
u16 key_idx;