On 01/04/2021 08:38, Nina Wu wrote:
> From: Nina Wu <Nina-CM.Wu@xxxxxxxxxxxx>
>
> There are 3 debug info registers in new ICs while in legacy ones,
> we have only 2. When dumping the debug info, we need to check first
> if the 3rd debug register exists and then we can konw how to decipher
> the debug info.
>
> Signed-off-by: Nina Wu <Nina-CM.Wu@xxxxxxxxxxxx>
> ---
> drivers/soc/mediatek/mtk-devapc.c | 31 +++++++++++++++++++++++++++++--
> 1 file changed, 29 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-devapc.c b/drivers/soc/mediatek/mtk-devapc.c
> index bcf6e3c..af55c01 100644
> --- a/drivers/soc/mediatek/mtk-devapc.c
> +++ b/drivers/soc/mediatek/mtk-devapc.c
> @@ -26,9 +26,19 @@ struct mtk_devapc_vio_dbgs {
> u32 addr_h:4;
> u32 resv:4;
> } dbg0_bits;
> +
> + /* Not used, reference only */
> + struct {
> + u32 dmnid:6;
> + u32 vio_w:1;
> + u32 vio_r:1;
> + u32 addr_h:4;
> + u32 resv:20;
> + } dbg0_bits_ver2;
> };
>
> u32 vio_dbg1;
> + u32 vio_dbg2;
> };
>
> struct mtk_devapc_data {
> @@ -37,6 +47,7 @@ struct mtk_devapc_data {
> u32 vio_sta_offset;
> u32 vio_dbg0_offset;
> u32 vio_dbg1_offset;
> + u32 vio_dbg2_offset;
> u32 apc_con_offset;
> u32 vio_shift_sta_offset;
> u32 vio_shift_sel_offset;
> @@ -158,12 +169,29 @@ static void devapc_extract_vio_dbg(struct mtk_devapc_context *ctx)
> struct mtk_devapc_vio_dbgs vio_dbgs;
> void __iomem *vio_dbg0_reg;
> void __iomem *vio_dbg1_reg;
> + void __iomem *vio_dbg2_reg;
> + u32 vio_addr, bus_id;
>
> vio_dbg0_reg = ctx->base + ctx->data->vio_dbg0_offset;
> vio_dbg1_reg = ctx->base + ctx->data->vio_dbg1_offset;
> + vio_dbg2_reg = ctx->base + ctx->data->vio_dbg2_offset;
We should read this only if we have version2 of the devapc.
>
> vio_dbgs.vio_dbg0 = readl(vio_dbg0_reg);
> vio_dbgs.vio_dbg1 = readl(vio_dbg1_reg);
> + vio_dbgs.vio_dbg2 = readl(vio_dbg2_reg);
> +
> + if (!ctx->data->vio_dbg2_offset) {
I think we should add a version field to mtk_devapc_data to distinguish the two
of them.
> + /* arch version 1 */
> + bus_id = vio_dbgs.dbg0_bits.mstid;
> + vio_addr = vio_dbgs.vio_dbg1;
> + } else {
> + /* arch version 2 */
> + bus_id = vio_dbgs.vio_dbg1;
> + vio_addr = vio_dbgs.vio_dbg2;
> +
> + /* To align with the bit definition of arch_ver 1 */
> + vio_dbgs.vio_dbg0 = (vio_dbgs.vio_dbg0 << 16);
That's magic, better add another variable domain_id and do here:
domain_id = vio_dgbs.dbg0_bits_ver2.dmnid;
> + }
>
> /* Print violation information */
> if (vio_dbgs.dbg0_bits.vio_w)
> @@ -172,8 +200,7 @@ static void devapc_extract_vio_dbg(struct mtk_devapc_context *ctx)
> dev_info(ctx->dev, "Read Violation\n");
>
> dev_info(ctx->dev, "Bus ID:0x%x, Dom ID:0x%x, Vio Addr:0x%x\n",
> - vio_dbgs.dbg0_bits.mstid, vio_dbgs.dbg0_bits.dmnid,
> - vio_dbgs.vio_dbg1);
> + bus_id, vio_dbgs.dbg0_bits.dmnid, vio_addr);
> }
>
> /*
>
