On Wed, Sep 03, 2025 at 10:54:28AM +0800, Dong Yibo wrote:
> Initialize basic mbx function.
>
> Signed-off-by: Dong Yibo <dong...@mucse.com>
...
> +/**
> + * mucse_mbx_inc_pf_req - Increase req
> + * @hw: pointer to the HW structure
> + *
> + * mucse_mbx_inc_pf_req read pf_req from hw, then write
> + * new value back after increase
> + **/
> +static void mucse_mbx_inc_pf_req(struct mucse_hw *hw)
> +{
> + struct mucse_mbx_info *mbx = &hw->mbx;
> + u16 req;
> + u32 v;
> +
> + v = mbx_data_rd32(mbx, MBX_PF2FW_COUNTER);
> + req = (v & GENMASK_U32(15, 0));
nit1: Unnecessary parentheses
nit2: I would have used FIELD_GET here in conjunction with something like.
#define MBX_PF2FW_COUNTER_MASK GENMASK_U32(15, 0)
> + req++;
> + v &= GENMASK_U32(31, 16);
> + v |= req;
And using FIELD_PREP is probably more succinct here.
Likewise in the following function
> + mbx_data_wr32(mbx, MBX_PF2FW_COUNTER, v);
> + hw->mbx.stats.msgs_tx++;
> +}
> +
> +/**
> + * mucse_mbx_inc_pf_ack - Increase ack
> + * @hw: pointer to the HW structure
> + *
> + * mucse_mbx_inc_pf_ack read pf_ack from hw, then write
> + * new value back after increase
> + **/
> +static void mucse_mbx_inc_pf_ack(struct mucse_hw *hw)
> +{
> + struct mucse_mbx_info *mbx = &hw->mbx;
> + u16 ack;
> + u32 v;
> +
> + v = mbx_data_rd32(mbx, MBX_PF2FW_COUNTER);
> + ack = (v >> 16) & GENMASK_U32(15, 0);
> + ack++;
> + v &= GENMASK_U32(15, 0);
> + v |= (ack << 16);
> + mbx_data_wr32(mbx, MBX_PF2FW_COUNTER, v);
> + hw->mbx.stats.msgs_rx++;
> +}
...
> +/**
> + * mucse_mbx_reset - Reset mbx info, sync info from regs
> + * @hw: pointer to the HW structure
> + *
> + * This function reset all mbx variables to default.
> + **/
> +static void mucse_mbx_reset(struct mucse_hw *hw)
> +{
> + struct mucse_mbx_info *mbx = &hw->mbx;
> + u32 v;
> +
> + v = mbx_data_rd32(mbx, MBX_FW2PF_COUNTER);
> + hw->mbx.fw_req = v & GENMASK_U32(15, 0);
> + hw->mbx.fw_ack = (v >> 16) & GENMASK_U32(15, 0);
I'd use FIELD_GET here too.
> + mbx_ctrl_wr32(mbx, PF2FW_MBOX_CTRL(mbx), 0);
> + mbx_ctrl_wr32(mbx, FW_PF_MBOX_MASK(mbx), GENMASK_U32(31, 16));
> +}
...
