brcmfmac: set F2 SDIO block size to 128 bytes for BCM4329

Setting F2 block size to 128 bytes for BCM4329 allows to significantly
improve RX throughput on NVIDIA Tegra20. Before this change the throughput
was capped to 30 Mbit/s on Tegra, now throughput is at 40 Mbit/s, which is
a maximum throughput for the BCM4329 chip. The F2 block size is borrowed
from the downstream BCMDHD driver. The comment in the BCMDHD driver says
that 128B improves throughput and turns out that it works for the brcmfmac
as well.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200830191439.10017-4-digetx@gmail.com

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 0dc4de2..318bd00 100644 (file)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -45,6 +45,7 @@
 #define SDIO_FUNC2_BLOCKSIZE           512
 #define SDIO_4373_FUNC2_BLOCKSIZE      256
 #define SDIO_435X_FUNC2_BLOCKSIZE      256
+#define SDIO_4329_FUNC2_BLOCKSIZE      128
 /* Maximum milliseconds to wait for F2 to come up */
 #define SDIO_WAIT_F2RDY        3000
 
@@ -920,6 +921,9 @@ int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
        case SDIO_DEVICE_ID_BROADCOM_4356:
                f2_blksz = SDIO_435X_FUNC2_BLOCKSIZE;
                break;
+       case SDIO_DEVICE_ID_BROADCOM_4329:
+               f2_blksz = SDIO_4329_FUNC2_BLOCKSIZE;
+               break;
        default:
                break;
        }