mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
112 lines
3.0 KiB
Diff
112 lines
3.0 KiB
Diff
From a6f14ebd60346418df6cb750c9e36563bd887720 Mon Sep 17 00:00:00 2001
|
|
From: Jonathan Bell <jonathan@raspberrypi.com>
|
|
Date: Thu, 18 Jan 2024 14:32:16 +0000
|
|
Subject: [PATCH 0843/1085] mmc: bcm2835-sdhost: use Host Software Queueing
|
|
mechanism
|
|
|
|
See commit 511ce378e16f ("mmc: Add MMC host software queue support")
|
|
|
|
Introduced in 5.8, this feature lets the block layer issue up to 2
|
|
pending requests to the MMC layer which in certain cases can improve
|
|
throughput, but in the case of this driver can significantly reduce
|
|
context switching when performing random reads.
|
|
|
|
On bcm2837 with a performant class A1 card, context switches under FIO
|
|
random 4k reads go from ~8800 per second to ~5800, with a reduction in
|
|
hardIRQs per second from ~5800 to ~4000. There is no appreciable
|
|
difference in throughput.
|
|
|
|
For bcm2835, and for workloads other than random read, HSQ is a wash in
|
|
terms of throughput and CPU load.
|
|
|
|
So, use it by default.
|
|
|
|
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
|
|
---
|
|
drivers/mmc/host/Kconfig | 1 +
|
|
drivers/mmc/host/bcm2835-sdhost.c | 27 ++++++++++++++++++++++-----
|
|
2 files changed, 23 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/mmc/host/Kconfig
|
|
+++ b/drivers/mmc/host/Kconfig
|
|
@@ -37,6 +37,7 @@ config MMC_BCM2835_PIO_DMA_BARRIER
|
|
config MMC_BCM2835_SDHOST
|
|
tristate "Support for the SDHost controller on BCM2708/9"
|
|
depends on ARCH_BCM2835
|
|
+ select MMC_HSQ
|
|
help
|
|
This selects the SDHost controller on BCM2835/6.
|
|
|
|
--- a/drivers/mmc/host/bcm2835-sdhost.c
|
|
+++ b/drivers/mmc/host/bcm2835-sdhost.c
|
|
@@ -57,6 +57,7 @@
|
|
|
|
/* For mmc_card_blockaddr */
|
|
#include "../core/card.h"
|
|
+#include "mmc_hsq.h"
|
|
|
|
#define DRIVER_NAME "sdhost-bcm2835"
|
|
|
|
@@ -1891,13 +1892,16 @@ static void bcm2835_sdhost_tasklet_finis
|
|
mmc_hostname(host->mmc));
|
|
}
|
|
|
|
- mmc_request_done(host->mmc, mrq);
|
|
+ if (!mmc_hsq_finalize_request(host->mmc, mrq))
|
|
+ mmc_request_done(host->mmc, mrq);
|
|
log_event("TSK>", mrq, 0);
|
|
}
|
|
|
|
-int bcm2835_sdhost_add_host(struct bcm2835_host *host)
|
|
+int bcm2835_sdhost_add_host(struct platform_device *pdev)
|
|
{
|
|
+ struct bcm2835_host *host = platform_get_drvdata(pdev);
|
|
struct mmc_host *mmc;
|
|
+ struct mmc_hsq *hsq;
|
|
struct dma_slave_config cfg;
|
|
char pio_limit_string[20];
|
|
int ret;
|
|
@@ -1992,6 +1996,16 @@ int bcm2835_sdhost_add_host(struct bcm28
|
|
goto untasklet;
|
|
}
|
|
|
|
+ hsq = devm_kzalloc(&pdev->dev, sizeof(*hsq), GFP_KERNEL);
|
|
+ if (!hsq) {
|
|
+ ret = -ENOMEM;
|
|
+ goto free_irq;
|
|
+ }
|
|
+
|
|
+ ret = mmc_hsq_init(hsq, host->mmc);
|
|
+ if (ret)
|
|
+ goto free_irq;
|
|
+
|
|
mmc_add_host(mmc);
|
|
|
|
pio_limit_string[0] = '\0';
|
|
@@ -2004,6 +2018,9 @@ int bcm2835_sdhost_add_host(struct bcm28
|
|
|
|
return 0;
|
|
|
|
+free_irq:
|
|
+ free_irq(host->irq, host);
|
|
+
|
|
untasklet:
|
|
tasklet_kill(&host->finish_tasklet);
|
|
|
|
@@ -2134,12 +2151,12 @@ static int bcm2835_sdhost_probe(struct p
|
|
|
|
host->firmware_sets_cdiv = (msg[1] != ~0);
|
|
|
|
- ret = bcm2835_sdhost_add_host(host);
|
|
+ platform_set_drvdata(pdev, host);
|
|
+
|
|
+ ret = bcm2835_sdhost_add_host(pdev);
|
|
if (ret)
|
|
goto err;
|
|
|
|
- platform_set_drvdata(pdev, host);
|
|
-
|
|
pr_debug("bcm2835_sdhost_probe -> OK\n");
|
|
|
|
return 0;
|