Hi Jaehoon,
On 20.01.2020 11:20, Jaehoon Chung wrote:
Use phys2bus macro when dma address is accessed. After applied it, SDMA mode can be used.
When thor download is used,
- Before : 1.8MB/s
- After : 7.23MB/s
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com
drivers/mmc/bcm2835_sdhci.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/bcm2835_sdhci.c b/drivers/mmc/bcm2835_sdhci.c index 39c93db275..222ba22d66 100644 --- a/drivers/mmc/bcm2835_sdhci.c +++ b/drivers/mmc/bcm2835_sdhci.c @@ -46,6 +46,7 @@ #include <asm/arch/mbox.h> #include <mach/sdhci.h> #include <mach/timer.h> +#include <phys2bus.h>
/* 400KHz is max freq for card ID etc. Use that as min */ #define MIN_FREQ 400000 @@ -86,7 +87,11 @@ static inline void bcm2835_sdhci_raw_writel(struct sdhci_host *host, u32 val, ; }
- writel(val, host->ioaddr + reg);
- if (reg == SDHCI_DMA_ADDRESS)
writel(phys_to_bus((unsigned long)val), host->ioaddr + reg);- else
writel(val, host->ioaddr + reg);- bcm_host->last_write = timer_get_us(); }
It would be better to fix this directly in the place where writel with SDHCI_DMA_ADDRESS is called:
simply change sdhci_writel(host, host->start_addr, SDHCI_DMA_ADDRESS) to sdhci_writel(host, phys_to_bus(host->start_addr), SDHCI_DMA_ADDRESS);
In such case no if statement is the needed and phys_to_bus() is safe for non-rpi users (it is identity in such case).
# git grep SDHCI_DMA_ADDRESS
shows 2 places where writel to SDHCI_DMA_ADDRESS is being done.
Best regards