Re: [PATCH 1/5] hw/cxl: Update HDM Decoder capability to version 3

[fan <nifan.cxl@gmail.com>]

On Wed, Jan 24, 2024 at 01:48:10PM +0000, Jonathan Cameron wrote:
> Part of standardizing the QEMU code on CXL r3.1.
> No fuctional changes as everything added is optional and
> it is set as not implemented.
> 
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---

Reviewed-by: Fan Ni <fan.ni@samsung.com>

>  include/hw/cxl/cxl_component.h | 16 ++++++++++++++--
>  hw/cxl/cxl-component-utils.c   | 10 +++++++++-
>  2 files changed, 23 insertions(+), 3 deletions(-)
> 
> diff --git a/include/hw/cxl/cxl_component.h b/include/hw/cxl/cxl_component.h
> index 5227a8e833..7d3edef1bf 100644
> --- a/include/hw/cxl/cxl_component.h
> +++ b/include/hw/cxl/cxl_component.h
> @@ -109,8 +109,9 @@ REG32(CXL_RAS_ERR_HEADER0, CXL_RAS_REGISTERS_OFFSET + 0x18)
>      (CXL_SEC_REGISTERS_OFFSET + CXL_SEC_REGISTERS_SIZE)
>  #define CXL_LINK_REGISTERS_SIZE   0x38
>  
> -/* 8.2.5.12 - CXL HDM Decoder Capability Structure */
> -#define HDM_DECODE_MAX 10 /* 8.2.5.12.1 */
> +/* CXL r3.1 Section 8.2.4.20: CXL HDM Decoder Capability Structure */
> +#define HDM_DECODE_MAX 10 /* Maximum decoders for Devices */
> +#define CXL_HDM_CAPABILITY_VERSION 3
>  #define CXL_HDM_REGISTERS_OFFSET \
>      (CXL_LINK_REGISTERS_OFFSET + CXL_LINK_REGISTERS_SIZE)
>  #define CXL_HDM_REGISTERS_SIZE (0x10 + 0x20 * HDM_DECODE_MAX)
> @@ -133,6 +134,11 @@ REG32(CXL_RAS_ERR_HEADER0, CXL_RAS_REGISTERS_OFFSET + 0x18)
>              FIELD(CXL_HDM_DECODER##n##_CTRL, COMMITTED, 10, 1)                 \
>              FIELD(CXL_HDM_DECODER##n##_CTRL, ERR, 11, 1)                       \
>              FIELD(CXL_HDM_DECODER##n##_CTRL, TYPE, 12, 1)                      \
> +            FIELD(CXL_HDM_DECODER##n##_CTRL, BI, 13, 1)                        \
> +            FIELD(CXL_HDM_DECODER##n##_CTRL, UIO, 14, 1)                       \
> +            FIELD(CXL_HDM_DECODER##n##_CTRL, UIG, 16, 4)                       \
> +            FIELD(CXL_HDM_DECODER##n##_CTRL, UIW, 20, 4)                       \
> +            FIELD(CXL_HDM_DECODER##n##_CTRL, ISP, 24, 4)                       \
>    REG32(CXL_HDM_DECODER##n##_TARGET_LIST_LO,                                   \
>          CXL_HDM_REGISTERS_OFFSET + (0x20 * n) + 0x24)                          \
>    REG32(CXL_HDM_DECODER##n##_TARGET_LIST_HI,                                   \
> @@ -148,6 +154,12 @@ REG32(CXL_HDM_DECODER_CAPABILITY, CXL_HDM_REGISTERS_OFFSET)
>      FIELD(CXL_HDM_DECODER_CAPABILITY, INTERLEAVE_256B, 8, 1)
>      FIELD(CXL_HDM_DECODER_CAPABILITY, INTERLEAVE_4K, 9, 1)
>      FIELD(CXL_HDM_DECODER_CAPABILITY, POISON_ON_ERR_CAP, 10, 1)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, 3_6_12_WAY, 11, 1)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, 16_WAY, 12, 1)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, UIO, 13, 1)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, UIO_DECODER_COUNT, 16, 4)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, MEMDATA_NXM_CAP, 20, 1)
> +    FIELD(CXL_HDM_DECODER_CAPABILITY, SUPPORTED_COHERENCY_MODEL, 21, 2)
>  REG32(CXL_HDM_DECODER_GLOBAL_CONTROL, CXL_HDM_REGISTERS_OFFSET + 4)
>      FIELD(CXL_HDM_DECODER_GLOBAL_CONTROL, POISON_ON_ERR_EN, 0, 1)
>      FIELD(CXL_HDM_DECODER_GLOBAL_CONTROL, HDM_DECODER_ENABLE, 1, 1)
> diff --git a/hw/cxl/cxl-component-utils.c b/hw/cxl/cxl-component-utils.c
> index 5ddd47ed8d..a55cf5a036 100644
> --- a/hw/cxl/cxl-component-utils.c
> +++ b/hw/cxl/cxl-component-utils.c
> @@ -243,6 +243,14 @@ static void hdm_init_common(uint32_t *reg_state, uint32_t *write_msk,
>      ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, INTERLEAVE_4K, 1);
>      ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY,
>                       POISON_ON_ERR_CAP, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, 3_6_12_WAY, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, 16_WAY, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, UIO, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY,
> +                     UIO_DECODER_COUNT, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY, MEMDATA_NXM_CAP, 0);
> +    ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_CAPABILITY,
> +                     SUPPORTED_COHERENCY_MODEL, 0); /* Unknown */
>      ARRAY_FIELD_DP32(reg_state, CXL_HDM_DECODER_GLOBAL_CONTROL,
>                       HDM_DECODER_ENABLE, 0);
>      write_msk[R_CXL_HDM_DECODER_GLOBAL_CONTROL] = 0x3;
> @@ -326,7 +334,7 @@ void cxl_component_register_init_common(uint32_t *reg_state,
>          return;
>      }
>  
> -    init_cap_reg(HDM, 5, 1);
> +    init_cap_reg(HDM, 5, CXL_HDM_CAPABILITY_VERSION);
>      hdm_init_common(reg_state, write_msk, type);
>  
>      if (caps < 5) {
> -- 
> 2.39.2
>