Hi Aurelien, On Sun, 20 Oct 2024 at 20:01, Aurelien Jarno <aurelien@xxxxxxxxxxx> wrote: > > The Synopsys DesignWare mmc controller on the JH7110 SoC > (dw_mmc-starfive.c driver) is using a 32-bit IDMAC address bus width, > and thus requires the use of SWIOTLB. > > The commit 8396c793ffdf ("mmc: dw_mmc: Fix IDMAC operation with pages > bigger than 4K") increased the max_seq_size, even for 4K pages, causing > "swiotlb buffer is full" to happen because swiotlb can only handle a > memory size up to 256kB only. > > Fix the issue, by making sure the dw_mmc driver doesn't use segments > bigger than what SWIOTLB can handle. > > Reported-by: Ron Economos <re@xxxxxxxx> > Reported-by: Jing Luo <jing@jing.rocks> > Fixes: 8396c793ffdf ("mmc: dw_mmc: Fix IDMAC operation with pages bigger than 4K") > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Aurelien Jarno <aurelien@xxxxxxxxxxx> > --- Please add my Tested-by: Anand Moon <linux.amoon@xxxxxxxxx> Thanks for fixing the warning below. [ 511.837216][ T148] dwmmc_starfive 16020000.mmc: swiotlb buffer is full (sz: 290816 bytes), total 65536 (slots), used 246 (slots) [ 511.837423][ C0] dwmmc_starfive 16020000.mmc: swiotlb buffer is full (sz: 278528 bytes), total 65536 (slots), used 222 (slots) [ 511.916951][ C0] dwmmc_starfive 16020000.mmc: swiotlb buffer is full (sz: 290816 bytes), total 65536 (slots), used 24 (slots) [ 516.803916][ T575] dwmmc_starfive 16020000.mmc: swiotlb buffer is full (sz: 507904 bytes), total 65536 (slots), used 122 (slots) [ 516.805450][ C0] dwmmc_starfive 16020000.mmc: swiotlb buffer is full (sz: 507904 bytes), total 65536 (slots), used 364 (slots) Thanks -Anand > drivers/mmc/host/dw_mmc.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c > index 41e451235f637..dc0d6201f7b73 100644 > --- a/drivers/mmc/host/dw_mmc.c > +++ b/drivers/mmc/host/dw_mmc.c > @@ -2958,7 +2958,8 @@ static int dw_mci_init_slot(struct dw_mci *host) > mmc->max_segs = host->ring_size; > mmc->max_blk_size = 65535; > mmc->max_req_size = DW_MCI_DESC_DATA_LENGTH * host->ring_size; > - mmc->max_seg_size = mmc->max_req_size; > + mmc->max_seg_size = > + min_t(size_t, mmc->max_req_size, dma_max_mapping_size(host->dev)); > mmc->max_blk_count = mmc->max_req_size / 512; > } else if (host->use_dma == TRANS_MODE_EDMAC) { > mmc->max_segs = 64; > -- > 2.45.2 > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-riscv