Re: [dpdk-dev] [PATCH v3 17/29] net/bnx2x: use eal I/O device memory read/write API

[Ferruh Yigit]

On 1/12/2017 9:17 AM, Jerin Jacob wrote:
<...>
>  
> @@ -1560,11 +1556,9 @@ bnx2x_reg_read32(struct bnx2x_softc *sc, size_t offset)
>  #define DPM_TRIGGER_TYPE 0x40
>  
>  /* Doorbell macro */
> -#define BNX2X_DB_WRITE(db_bar, val) \
> -     *((volatile uint32_t *)(db_bar)) = (val)
> +#define BNX2X_DB_WRITE(db_bar, val) rte_write32_relaxed((val), (db_bar))

What is the rule to use relaxed version or not?

I don't know about memory barrier requirements, if it is easy, would you
mind explaining? Because I have same question for many different parts
of this patchset.

Thanks,
ferruh