Hi Adrian, Ulf, could you please review these patches? Any comments are welcome. Thanks in advance, Jisheng On Mon, 30 Jul 2018 10:42:28 +0800 Jisheng Zhang wrote: > When using DMA, if the DMA addr spans 128MB boundary, we have to split > the DMA transfer into two so that each one doesn't exceed the boundary. > > patch1 adds adma_table_num to struct sdhci_host so that driver can > control the ADMA table number. > patch2 introduces adma_write_desc() hook to struct sdhci_ops so that > driver can override it. > patch3 finally solves the 128MB boundary limitation. > > since v2: > - make use of "likely" to check (!len || BOUNDARY_OK(addr, len)) > - explictly include <linux/sizes.h> for SZ_128M > > since v1: > - fix BOUNDARY_OK macro if addr+len is aligned to 128MB > - use DIV_ROUND_UP to cal extra desc num > - fix !len for dwcmshc_adma_write_desc() > > Jisheng Zhang (3): > mmc: sdhci: add adma_table_num member to struct sdhci_host > mmc: sdhci: introduce adma_write_desc() hook to struct sdhci_ops > mmc: sdhci-of-dwcmshc: solve 128MB DMA boundary limitation > > drivers/mmc/host/sdhci-of-dwcmshc.c | 43 ++++++++++++++++++++++++++ > drivers/mmc/host/sdhci.c | 48 +++++++++++++++++++---------- > drivers/mmc/host/sdhci.h | 8 +++++ > 3 files changed, 83 insertions(+), 16 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
