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@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240121071826.10159-5-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/realtek/rtw89/pci.h b/drivers/net/wireless/realtek/rtw89/pci.h
index 83a36358504f41a23c283bc7924b155a64a9e4f8..772a84bd8db6b38518bfa676baf93a30a9e23d8e 100644 (file)
--- 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