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ath9k_hw: Compute pointer checksum over the link descriptor

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Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2010-04-15 17:39:35 -04:00 committed by John W. Linville
parent 5088c2f1a2
commit eb8232535b
1 changed files with 21 additions and 15 deletions
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36
drivers/net/wireless/ath/ath9k/ar9003_mac.c
View file

@ -21,14 +21,33 @@ static void ar9003_hw_rx_enable(struct ath_hw *hw)
REG_WRITE(hw, AR_CR, 0);
}
static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
{
int checksum;
checksum = ads->info + ads->link
+ ads->data0 + ads->ctl3
+ ads->data1 + ads->ctl5
+ ads->data2 + ads->ctl7
+ ads->data3 + ads->ctl9;
return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
}
static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
{
((struct ar9003_txc *) ds)->link = ds_link;
struct ar9003_txc *ads = ds;
ads->link = ds_link;
ads->ctl10 &= ~AR_TxPtrChkSum;
ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
}
static void ar9003_hw_get_desc_link(void *ds, u32 **ds_link)
{
*ds_link = &((struct ar9003_txc *) ds)->link;
struct ar9003_txc *ads = ds;
*ds_link = &ads->link;
}
static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
@ -168,19 +187,6 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
return true;
}
static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
{
int checksum;
checksum = ads->info + ads->link
+ ads->data0 + ads->ctl3
+ ads->data1 + ads->ctl5
+ ads->data2 + ads->ctl7
+ ads->data3 + ads->ctl9;
return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
}
static void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,
bool is_firstseg, bool is_lastseg,
const void *ds0, dma_addr_t buf_addr,