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Date: Thu, 3 Nov 2022 15:23:19 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Lorenzo Bianconi <lorenzo@...nel.org>, netdev@...r.kernel.org
Cc: nbd@....name, john@...ozen.org, sean.wang@...iatek.com,
Mark-MC.Lee@...iatek.com, davem@...emloft.net, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, matthias.bgg@...il.com,
linux-mediatek@...ts.infradead.org, lorenzo.bianconi@...hat.com,
Bo.Jiao@...iatek.com, sujuan.chen@...iatek.com,
ryder.Lee@...iatek.com, evelyn.tsai@...iatek.com,
devicetree@...r.kernel.org, robh+dt@...nel.org,
daniel@...rotopia.org, krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH v3 net-next 3/8] net: ethernet: mtk_wed: introduce wed mcu
support
Il 03/11/22 10:28, Lorenzo Bianconi ha scritto:
> From: Sujuan Chen <sujuan.chen@...iatek.com>
>
> Introduce WED mcu support used to configure WED WO chip.
> This is a preliminary patch in order to add RX Wireless
> Ethernet Dispatch available on MT7986 SoC.
>
> Tested-by: Daniel Golle <daniel@...rotopia.org>
> Co-developed-by: Lorenzo Bianconi <lorenzo@...nel.org>
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
> Signed-off-by: Sujuan Chen <sujuan.chen@...iatek.com>
> ---
> drivers/net/ethernet/mediatek/Makefile | 2 +-
> drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 364 +++++++++++++++++++
> drivers/net/ethernet/mediatek/mtk_wed_regs.h | 1 +
> drivers/net/ethernet/mediatek/mtk_wed_wo.h | 152 ++++++++
> include/linux/soc/mediatek/mtk_wed.h | 29 ++
> 5 files changed, 547 insertions(+), 1 deletion(-)
> create mode 100644 drivers/net/ethernet/mediatek/mtk_wed_mcu.c
> create mode 100644 drivers/net/ethernet/mediatek/mtk_wed_wo.h
>
> diff --git a/drivers/net/ethernet/mediatek/Makefile b/drivers/net/ethernet/mediatek/Makefile
> index 45ba0970504a..d4bdefa77159 100644
> --- a/drivers/net/ethernet/mediatek/Makefile
> +++ b/drivers/net/ethernet/mediatek/Makefile
> @@ -5,7 +5,7 @@
>
> obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth.o
> mtk_eth-y := mtk_eth_soc.o mtk_sgmii.o mtk_eth_path.o mtk_ppe.o mtk_ppe_debugfs.o mtk_ppe_offload.o
> -mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o
> +mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o mtk_wed_mcu.o
> ifdef CONFIG_DEBUG_FS
> mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed_debugfs.o
> endif
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
> new file mode 100644
> index 000000000000..20987eecfb52
> --- /dev/null
> +++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
..snip..
> +
> +int mtk_wed_mcu_init(struct mtk_wed_wo *wo)
> +{
> + u32 val;
> + int ret;
> +
> + skb_queue_head_init(&wo->mcu.res_q);
> + init_waitqueue_head(&wo->mcu.wait);
> + mutex_init(&wo->mcu.mutex);
> +
> + ret = mtk_wed_mcu_load_firmware(wo);
> + if (ret)
> + return ret;
> +
> + do {
> + /* get dummy cr */
> + val = wed_r32(wo->hw->wed_dev,
> + MTK_WED_SCR0 + 4 * MTK_WED_DUMMY_CR_FWDL);
> + } while (val && !time_after(jiffies, jiffies + MTK_FW_DL_TIMEOUT));
Here you can use readx_poll_timeout() instead: please do so.
> +
> + return val ? -EBUSY : 0;
> +}
> +
> +MODULE_FIRMWARE(MT7986_FIRMWARE_WO0);
> +MODULE_FIRMWARE(MT7986_FIRMWARE_WO1);
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed_regs.h b/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> index e270fb336143..c940b3bb215b 100644
> --- a/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> +++ b/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> @@ -152,6 +152,7 @@ struct mtk_wdma_desc {
>
> #define MTK_WED_RING_RX(_n) (0x400 + (_n) * 0x10)
>
> +#define MTK_WED_SCR0 0x3c0
> #define MTK_WED_WPDMA_INT_TRIGGER 0x504
> #define MTK_WED_WPDMA_INT_TRIGGER_RX_DONE BIT(1)
> #define MTK_WED_WPDMA_INT_TRIGGER_TX_DONE GENMASK(5, 4)
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.h b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
> new file mode 100644
> index 000000000000..2ef3ccdec5bf
> --- /dev/null
> +++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.h
> @@ -0,0 +1,152 @@
..snip..
> +
> +#define MTK_WO_MCU_CFG_LS_BASE 0 /* XXX: 0x15194000 */
Since that definition is zero, you can safely remove it: like so, the ones
following will be a bit more readable.
> +#define MTK_WO_MCU_CFG_LS_HW_VER_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x000)
> +#define MTK_WO_MCU_CFG_LS_FW_VER_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x004)
> +#define MTK_WO_MCU_CFG_LS_CFG_DBG1_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x00c)
> +#define MTK_WO_MCU_CFG_LS_CFG_DBG2_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x010)
> +#define MTK_WO_MCU_CFG_LS_WF_MCCR_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x014)
> +#define MTK_WO_MCU_CFG_LS_WF_MCCR_SET_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x018)
> +#define MTK_WO_MCU_CFG_LS_WF_MCCR_CLR_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x01c)
> +#define MTK_WO_MCU_CFG_LS_WF_MCU_CFG_WM_WA_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x050)
> +#define MTK_WO_MCU_CFG_LS_WM_BOOT_ADDR_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x060)
> +#define MTK_WO_MCU_CFG_LS_WA_BOOT_ADDR_ADDR (MTK_WO_MCU_CFG_LS_BASE + 0x064)
..snip..
> +
> +static inline int
> +mtk_wed_mcu_check_msg(struct mtk_wed_wo *wo, struct sk_buff *skb)
> +{
> + struct mtk_wed_mcu_hdr *hdr = (struct mtk_wed_mcu_hdr *)skb->data;
> +
> + if (hdr->version)
if (hdr->version || skb->len < sizeof(*hdr) || skb->len != le16_to_cpu(hdr->length))
return -EINVAL;
> + return -EINVAL;
> +
> + if (skb->len < sizeof(*hdr))
> + return -EINVAL;
> +
> + if (skb->len != le16_to_cpu(hdr->length))
> + return -EINVAL;
> +
> + return 0;
> +}
> +
Regards,
Angelo
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