lwn.git/drivers/net/wireless/realtek/rtw88/tx.h, branch v6.1-rc1

rtw88: Add update beacon flow for AP mode

2022-04-12T13:52:05+00:00

To support stations in power saving mode, AP should notify stations that there are frames buffered at the AP via TIM during beacons. Driver used to transmit identical beacons that were downloaded to hardware during the initiation phase. This beacon will become obsolete over time. If the beacon does not contain sufficient information, station would not be able to percept that there is data to receive. Hence it won't wake up and start the PS-poll procedure, this could lead to timeout and/or lost data segments. In order to resolve this issue, driver will now download beacon to hardware whenever the content is updated. Enable hardware to update dtim_count for more efficiency, this reduces the overhead of downloading beacon at every beacon interval since most of the time only the dtim_count needs to be updated. Change queue mapping for broadcast/multicast frames to high queue, so these frames can be prioritized and sent when dtim_count is zero. Signed-off-by: Po-Hao Huang Signed-off-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220407095858.46807-4-pkshih@realtek.com

rtw88: replace tx tasklet with work queue

2021-02-12T07:51:09+00:00

Replace tasklet so we can do tx scheduling in parallel. Since throughput is delay-sensitive in most cases, we allocate a dedicated, high priority wq for our needs. Signed-off-by: Po-Hao Huang Signed-off-by: Ping-Ke Shih Reviewed-by: Brian Norris Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210209070755.23019-5-pkshih@realtek.com

rtw88: add rts condition

2021-02-12T07:50:55+00:00

Since we set the IEEE80211_HW_HAS_RATE_CONTROL flag, so use_rts in ieee80211_tx_info will never be set in the ieee80211_xmit_fast path. Add length check for skb to decide whether rts is needed. Signed-off-by: Po-Hao Huang Signed-off-by: Ping-Ke Shih Reviewed-by: Brian Norris Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210209070755.23019-3-pkshih@realtek.com

rtlwifi/rtw88: convert tasklets to use new tasklet_setup() API

2020-08-27T13:22:14+00:00

In preparation for unconditionally passing the struct tasklet_struct pointer to all tasklet callbacks, switch to using the new tasklet_setup() and from_tasklet() to pass the tasklet pointer explicitly and remove .data field. Signed-off-by: Romain Perier Signed-off-by: Allen Pais Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200817090637.26887-16-allen.cryptic@gmail.com

rtw88: update tx descriptor of mgmt and reserved page packets

2020-08-02T15:05:14+00:00

Previous settings for TX descriptors of and reserved page packets are insufficient. For the sequence number of packets downloaded to reserved page, it should be filled by hardware. And for ps-poll packets in reserved page, to prevent AID being changed by hardware, NAVUSEHDR should be set. Additionally, the rate should be adjusted based on the current band for mgmt and reserved page packets. Signed-off-by: Tzu-En Huang Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200717064937.27966-4-yhchuang@realtek.com

rtw88: handle C2H_CCX_TX_RPT to know if packet TX'ed successfully

2020-05-06T08:34:31+00:00

TX status report of 8723D differs from 8822B/8822C, it uses C2H_CCX_TX_RPT (0x03) with different format. With sequence number and TX status, driver can know if certain packet was transmitted successfully. Signed-off-by: Ping-Ke Shih Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200504105010.10780-5-yhchuang@realtek.com

rtw88: fix non-increase management packet sequence number

2020-03-26T19:21:43+00:00

In previous setting, management packets' sequence numbers will not increase and always stay at 0. Add hw sequence number support for mgmt packets. The table below shows different sequence number setting in the tx descriptor. seq num ctrl | EN_HWSEQ | DISQSELSEL | HW_SSN_SEL ------------------------------------------------------ sw ctrl | 0 | N/A | N/A hw ctrl per MACID | 1 | 0 | N/A hw ctrl per HWREG | 1 | 1 |HWREG(0/1/2/3) Signed-off-by: Tzu-En Huang Signed-off-by: Yan-Hsuan Chuang Reviewed-by: Brian Norris Tested-by: Brian Norris Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200326020408.25218-1-yhchuang@realtek.com

rtw88: kick off TX packets once for higher efficiency

2020-03-23T17:29:58+00:00

Driver used to kick off every TX packets, that will waste some time while we can do better to kick off the TX packets once after they are all prepared to be transmitted. For PCI, it uses DMA engine to transfer the SKBs to the device, and the transition of the state of the DMA engine could be a cost. Driver can save some time to kick off multiple SKBs once so that the DMA engine will have only one transition. So, split rtw_hci_ops::tx() to rtw_hci_ops::tx_write() and rtw_hci_ops::tx_kick_off() to explicitly kick the SKBs off after they are written to the prepared buffer. For packets come from ieee80211_ops::tx(), write one and then kick it off immediately. For packets queued in TX queue, which come from ieee80211_ops::wake_tx_queue(), we can dequeue them, write them to the buffer, and then kick them off together. Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200312080852.16684-6-yhchuang@realtek.com

rtw88: extract alloc rsvd_page and h2c skb routines

2020-03-23T17:29:34+00:00

Extract skb allocation routines for rsvd_page and h2c. These routines should also be used by USB and SDIO. This should not change the logic at all. memset() for pkt_info is unnecessary, just declare as {0}. Also skb_put()/memcpy() can be replaced by skb_put_data(). Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200312080852.16684-3-yhchuang@realtek.com

rtw88: add driver TX queue support

2019-10-04T13:44:55+00:00

The mac80211 provides software TX queue for driver, as long as driver has hooked ieee80211_ops::wake_tx_queue. Each time a packet is queued onto the TX queue, that queue will be woken up the inform driver to serve the queue. Now driver only supports PCI interface ICs, there's no specific traffic control for each queue, just schedule a tasklet, and dump all of the packets at once to the DMA ring. Instead of TX the packets whenever TX queue is woke, tasklet handler can have more packets dumped to the device, takes advantage of burst write with DMA engine. And if the driver is going to support USB/SDIO ICs, the tasklet can be more flexible for aggregating the packets, enhance the efficiency of bandwidth usage. Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo