[dpdk-dev] [PATCH v3 17/29] net/bnx2x: use eal I/O device memory read/write API
Ferruh Yigit
ferruh.yigit at intel.com
Thu Jan 12 20:11:18 CET 2017
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
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