On 10/29/23 01:00, 'Guanjun' wrote:
> From: Guanjun <guanjun@xxxxxxxxxxxxxxxxx>
>
> Fix the incorrect descriptions for the GRPCFG register.
> No functional changes
>
> Signed-off-by: Guanjun <guanjun@xxxxxxxxxxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Thanks!
> ---
> drivers/dma/idxd/registers.h | 13 ++++++++-----
> 1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h
> index 7b54a3939ea1..385a162a55f2 100644
> --- a/drivers/dma/idxd/registers.h
> +++ b/drivers/dma/idxd/registers.h
> @@ -440,12 +440,15 @@ union wqcfg {
> /*
> * This macro calculates the offset into the GRPCFG register
> * idxd - struct idxd *
> - * n - wq id
> - * ofs - the index of the 32b dword for the config register
> + * n - group id
> + * ofs - the index of the 64b qword for the config register
> *
> - * The WQCFG register block is divided into groups per each wq. The n index
> - * allows us to move to the register group that's for that particular wq.
> - * Each register is 32bits. The ofs gives us the number of register to access.
> + * The GRPCFG register block is divided into three different types, that
> + * includes GRPWQCFG, GRPENGCFG and GRPFLGCFG. The n index in each group
> + * allows us to move to the register group that's for that particular wq,
> + * engine or group flag.
> + * Each register is 64bits. And the ofs in GRPWQCFG gives us the number
> + * of register to access.
> */
> #define GRPWQCFG_OFFSET(idxd_dev, n, ofs) ((idxd_dev)->grpcfg_offset +\
> (n) * GRPCFG_SIZE + sizeof(u64) * (ofs))
