Hi, There are three functions where AR_DIAG_SW is set with REG_SET_BIT(), but I'm not sure in which function I should add REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_ACK_DIS). Do you have any suggestions?
function1: ath9k_hw_abort_tx_dma() REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH); function2: ath9k_hw_setrxabort() REG_SET_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT)); function3: ath9k_hw_abortpcurecv() REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS); Thank you. Best, Liang On Thu, Jun 9, 2011 at 4:07 PM, Adrian Chadd <adr...@freebsd.org> wrote: > Best thing to do is look at the code that disables ACK in the TX > descriptor and set that. > > There's also the DIAG register, as mentioned. For ath9k: > > reg.h:#define AR_DIAG_SW 0x8048 > reg.h:#define AR_DIAG_ACK_DIS 0x00000002 > > Find where AR_DIAG_SW is set in the ath9k code (it's fiddled with in a > few places) and call the REG_SET_BIT() appropriately. > > Do the same for ath5k once you find the right register/field definition. > > HTH, > > > > Adrian > > On 9 June 2011 15:03, Liang <leonc...@gmail.com> wrote: > > Hi Adrian, > > Thank you. May I ask how to set these registers to disable the ACK in the > > ath5k/ath9k driver? > > Best, > > Leon > > > > On Thu, Jun 9, 2011 at 2:32 PM, Adrian Chadd <adr...@freebsd.org> wrote: > >> > >> No, retry doesn't stop ack's, it just stops the hardware from retrying > >> a packet if it hasn't heard an ACK. > >> > >> You can fiddle with the diag register, or you can just ensure that the > >> relevant bit in the TX descriptor isn't set. > >> > >> fgrep NOACK ath9k/*.h > >> mac.h:#define ATH9K_TXDESC_NOACK 0x0002 > >> > >> fgrep NOACK ath5k/*.h > >> > >> fgrep NOACK *h > >> desc.h:#define AR5K_2W_TX_DESC_CTL1_NOACK_5211 0x00800000 /* > >> [5211] no ACK */ > >> desc.h:#define AR5K_4W_TX_DESC_CTL1_NOACK 0x01000000 /* no > >> ACK */ > >> desc.h:#define AR5K_TXDESC_NOACK 0x0002 /*[5211+]*/ > >> > >> There's likely some API you can use at a higher level to signify to > >> the TX code that no, you don't want an ACK for the packet. > >> > >> Eg, look at ath9k/setup_tx_flags(): > >> > >> struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); > >> ... > >> if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) > >> flags |= ATH9K_TXDESC_NOACK; > >> > >> HTH, > >> > >> > >> Adrian > >> > >> On 9 June 2011 13:55, Liang <leonc...@gmail.com> wrote: > >> > Hi, > >> > I want to know if the ACK at 802.11 MAC layer can be turned off in the > >> > ath5k/ath9k, and how can it be done? > >> > On the other hand, does the command "iwconfig wlan0 retry 0" disable > the > >> > MAC > >> > retransmission? Is it the same to turnoff the ACK? > >> > Thank you! > >> > Best, > >> > Leon > >> > _______________________________________________ > >> > ath5k-devel mailing list > >> > ath5k-devel@lists.ath5k.org > >> > https://lists.ath5k.org/mailman/listinfo/ath5k-devel > >> > > >> > > > > > >
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