This is a note to let you know that I've just added the patch titled
wifi: rtw89: pci: enlarge RX DMA buffer to consider size of RX descriptor
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-rtw89-pci-enlarge-rx-dma-buffer-to-consider-siz.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d9b3f2c2dee1262484a34de7df45d9a8048967a2
Author: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Date: Sun Jan 21 15:18:26 2024 +0800
wifi: rtw89: pci: enlarge RX DMA buffer to consider size of RX descriptor
[ Upstream commit c108b4a50dd7650941d4f4ec5c161655a73711db ]
Hardware puts RX descriptor and packet in RX DMA buffer, so it could be
over one buffer size if packet size is 11454, and then it will be split
into two segments. WiFi 7 chips use larger size of RX descriptor, so
enlarge DMA buffer size according to RX descriptor to have better
performance and simple flow.
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://msgid.link/20240121071826.10159-5-pkshih@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/realtek/rtw89/pci.h b/drivers/net/wireless/realtek/rtw89/pci.h
index 83a36358504f4..772a84bd8db6b 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.h
+++ b/drivers/net/wireless/realtek/rtw89/pci.h
@@ -996,7 +996,7 @@
#define RTW89_PCI_TXWD_NUM_MAX 512
#define RTW89_PCI_TXWD_PAGE_SIZE 128
#define RTW89_PCI_ADDRINFO_MAX 4
-#define RTW89_PCI_RX_BUF_SIZE 11460
+#define RTW89_PCI_RX_BUF_SIZE (11454 + 40) /* +40 for rtw89_rxdesc_long_v2 */
#define RTW89_PCI_POLL_BDRAM_RST_CNT 100
#define RTW89_PCI_MULTITAG 8
