Re: [PATCH v4 07/10] hw/mem/cxl_type3: Add DC extent list representative and get DC extent list mailbox support

[Wonjae Lee <wj28.lee@gmail.com>]

On 2024-02-22 오전 3:16, nifan.cxl@gmail.com wrote:
> From: Fan Ni <fan.ni@samsung.com>
> 
> Add dynamic capacity extent list representative to the definition of
> CXLType3Dev and add get DC extent list mailbox command per
> CXL.spec.3.1:.8.2.9.9.9.2.
> 
> Signed-off-by: Fan Ni <fan.ni@samsung.com>
> ---
>   hw/cxl/cxl-mailbox-utils.c  | 71 +++++++++++++++++++++++++++++++++++++
>   hw/mem/cxl_type3.c          |  1 +
>   include/hw/cxl/cxl_device.h | 23 ++++++++++++
>   3 files changed, 95 insertions(+)
> 
> diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
> index f95e417683..dae7fe00ed 100644
> --- a/hw/cxl/cxl-mailbox-utils.c
> +++ b/hw/cxl/cxl-mailbox-utils.c
> @@ -83,6 +83,7 @@ enum {
>           #define CLEAR_POISON           0x2
>       DCD_CONFIG  = 0x48,
>           #define GET_DC_CONFIG          0x0
> +        #define GET_DYN_CAP_EXT_LIST   0x1
>       PHYSICAL_SWITCH = 0x51,
>           #define IDENTIFY_SWITCH_DEVICE      0x0
>           #define GET_PHYSICAL_PORT_STATE     0x1
> @@ -1344,6 +1345,73 @@ static CXLRetCode cmd_dcd_get_dyn_cap_config(const struct cxl_cmd *cmd,
>       return CXL_MBOX_SUCCESS;
>   }
>   
> +/*
> + * CXL r3.1 section 8.2.9.9.9.2:
> + * Get Dynamic Capacity Extent List (Opcode 4801h)
> + */
> +static CXLRetCode cmd_dcd_get_dyn_cap_ext_list(const struct cxl_cmd *cmd,
> +                                               uint8_t *payload_in,
> +                                               size_t len_in,
> +                                               uint8_t *payload_out,
> +                                               size_t *len_out,
> +                                               CXLCCI *cci)
> +{
> +    CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
> +    struct get_dyn_cap_ext_list_in_pl {
> +        uint32_t extent_cnt;
> +        uint32_t start_extent_id;
> +    } QEMU_PACKED;
> +
> +    struct get_dyn_cap_ext_list_out_pl {
> +        uint32_t count;
> +        uint32_t total_extents;
> +        uint32_t generation_num;
> +        uint8_t rsvd[4];
> +        CXLDCExtentRaw records[];
> +    } QEMU_PACKED;
> +
> +    struct get_dyn_cap_ext_list_in_pl *in = (void *)payload_in;
> +    struct get_dyn_cap_ext_list_out_pl *out = (void *)payload_out;
> +    uint16_t record_count = 0, i = 0, record_done = 0;
> +    CXLDCExtentList *extent_list = &ct3d->dc.extents;
> +    CXLDCExtent *ent;
> +    uint16_t out_pl_len;
> +    uint32_t start_extent_id = in->start_extent_id;
> +
> +    if (start_extent_id > ct3d->dc.total_extent_count) {

Hello,

Shouldn't it be >= rather than >?

(I accidentally replied to v3 with the same comment above, so please 
ignore that.)

Thanks,
Wonjae