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mmc: rockchip_sdhci: Use bounce buffer in SPL to fix read performance

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The commit 3b804b370d ("mmc: rockchip_sdhci: Disable DMA mode using a
device tree property") and commit 2cc6cde647 ("mmc: rockchip_sdhci:
Limit number of blocks read in a single command") implemented a
workaround to fix loading a part of TF-A into SRAM from eMMC in SPL.

This has resulted in very slow read performance of FIT from eMMC in SPL
on RK3588.

Change to make use of a bounce buffer to significantly improve the read
performance when malloc_limit is large enough and use PIO mode as fall
back.

Also update the size of align_buffer to use SDHCI_DEFAULT_BOUNDARY_SIZE
instead of a hardcoded 512 * 1024.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://patchwork.ozlabs.org/patch/1895377/
This commit is contained in:
Jonas Karlman
2024-02-05 18:27:33 +00:00
committed by Ondrej Jirman
parent 85316c807e
commit 320e366321
2 changed files with 17 additions and 5 deletions
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20
drivers/mmc/rockchip_sdhci.c
View File

@@ -20,6 +20,9 @@
#include <syscon.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/hardware.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
/* DWCMSHC specific Mode Select value */
#define DWCMSHC_CTRL_HS400 0x7
@@ -606,12 +609,21 @@ static int rockchip_sdhci_probe(struct udevice *dev)
return ret;
/*
* Disable use of DMA and force use of PIO mode in SPL to fix an issue
* where loading part of TF-A into SRAM using DMA silently fails.
* Use a bounce buffer or PIO mode in SPL to fix an issue where loading
* part of TF-A directly into SRAM using DMA silently fails.
*/
if (IS_ENABLED(CONFIG_SPL_BUILD) &&
dev_read_bool(dev, "u-boot,spl-fifo-mode"))
host->flags &= ~USE_DMA;
dev_read_bool(dev, "u-boot,spl-fifo-mode")) {
if (CONFIG_IS_ENABLED(SYS_MALLOC_F) &&
gd->malloc_limit > SDHCI_DEFAULT_BOUNDARY_SIZE) {
cfg->b_max = SDHCI_DEFAULT_BOUNDARY_SIZE /
MMC_MAX_BLOCK_LEN;
host->force_align_buffer = true;
host->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR;
} else {
host->flags &= ~USE_DMA;
}
}
return sdhci_probe(dev);
}

2
drivers/mmc/sdhci.c
View File

@@ -736,7 +736,7 @@ static int sdhci_init(struct mmc *mmc)
host->force_align_buffer = true;
#else
if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) {
host->align_buffer = memalign(8, 512 * 1024);
host->align_buffer = memalign(8, SDHCI_DEFAULT_BOUNDARY_SIZE);
if (!host->align_buffer) {
printf("%s: Aligned buffer alloc failed!!!\n",
__func__);