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Date: Mon, 11 Apr 2022 15:24:15 -0500
From: Carlos Bilbao <carlos.bilbao@....com>
To: Naveen Krishna Chatradhi <nchatrad@....com>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: hdegoede@...hat.com, markgross@...nel.org, siva.sathappan@....com,
Suma Hegde <suma.hegde@....com>
Subject: Re: [PATCH] amd_hsmp: Add HSMP protocol version 5 messages
On 4/11/2022 12:47 PM, Naveen Krishna Chatradhi wrote:
> From: Suma Hegde <suma.hegde@....com>
>
> HSMP protocol version 5 is supported on AMD family 19h model 10h
> EPYC processors. This version brings new features such as
> -- DIMM statistics
> -- Bandiwdth for IO and xGMI links
s/Bandiwdth/Bandwidth
> -- Monitor socket and core frequency limits
> -- Configure power efficiency modes, df pstate range etc
>
> Briefly, describe the new messages.
I think this line should go.
>
> Signed-off-by: Suma Hegde <suma.hegde@....com>
> Reviewed-by: Carlos Bilbao <carlos.bilbao@....com>
> Signed-off-by: Naveen Krishna Chatradhi <nchatrad@....com>
> ---
> arch/x86/include/uapi/asm/amd_hsmp.h | 114 +++++++++++++++++++++++++--
> 1 file changed, 109 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/include/uapi/asm/amd_hsmp.h b/arch/x86/include/uapi/asm/amd_hsmp.h
> index 7ee7ba0d63a3..769b939444ae 100644
> --- a/arch/x86/include/uapi/asm/amd_hsmp.h
> +++ b/arch/x86/include/uapi/asm/amd_hsmp.h
> @@ -31,9 +31,22 @@ enum hsmp_message_ids {
> HSMP_GET_CCLK_THROTTLE_LIMIT, /* 10h Get CCLK frequency limit in socket */
> HSMP_GET_C0_PERCENT, /* 11h Get average C0 residency in socket */
> HSMP_SET_NBIO_DPM_LEVEL, /* 12h Set max/min LCLK DPM Level for a given NBIO */
> - /* 13h Reserved */
> - HSMP_GET_DDR_BANDWIDTH = 0x14, /* 14h Get theoretical maximum and current DDR Bandwidth */
> - HSMP_GET_TEMP_MONITOR, /* 15h Get per-DIMM temperature and refresh rates */
> + HSMP_GET_NBIO_DPM_LEVEL, /* 13h Get LCLK DPM level min and max for a given NBIO */
> + HSMP_GET_DDR_BANDWIDTH, /* 14h Get theoretical maximum and current DDR Bandwidth */
> + HSMP_GET_TEMP_MONITOR, /* 15h Get socket temperature */
> + HSMP_GET_DIMM_TEMP_RANGE, /* 16h Get per-DIMM temperature range and refresh rate */
> + HSMP_GET_DIMM_POWER, /* 17h Get per-DIMM power consumption */
> + HSMP_GET_DIMM_THERMAL, /* 18h Get per-DIMM thermal sensors */
> + HSMP_GET_SOCKET_FREQ_LIMIT, /* 19h Get current active frequency per socket */
> + HSMP_GET_CCLK_CORE_LIMIT, /* 1Ah Get CCLK frequency limit per core */
> + HSMP_GET_RAILS_SVI, /* 1Bh Get SVI-based Telemetry for all rails */
> + HSMP_GET_SOCKET_FMAX_FMIN, /* 1Ch Get Fmax and Fmin per socket */
> + HSMP_GET_IOLINK_BANDWITH, /* 1Dh Get current bandwidth on IO Link */
> + HSMP_GET_XGMI_BANDWITH, /* 1Eh Get current bandwidth on xGMI Link */
> + HSMP_SET_GMI3_WIDTH, /* 1Fh Set max and min GMI3 Link width */
> + HSMP_SET_PCI_RATE, /* 20h Control link rate on PCIe devices */
> + HSMP_SET_POWER_MODE, /* 21h Select power efficiency profile policy */
> + HSMP_SET_PSTATE_MAX_MIN, /* 22h Set the max and min DF P-State */
> HSMP_MSG_ID_MAX,
> };
>
> @@ -175,8 +188,12 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[] = {
> */
> {1, 0, HSMP_SET},
>
> - /* RESERVED message */
> - {0, 0, HSMP_RSVD},
> + /*
> + * HSMP_GET_NBIO_DPM_LEVEL, num_args = 1, response_sz = 1
> + * input: args[0] = nbioid[23:16]
> + * output: args[0] = max dpm level[15:8] + min dpm level[7:0]
> + */
> + {1, 1, HSMP_GET},
>
> /*
> * HSMP_GET_DDR_BANDWIDTH, num_args = 0, response_sz = 1
> @@ -191,6 +208,93 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[] = {
> * [7:5] fractional part
> */
> {0, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_DIMM_TEMP_RANGE, num_args = 1, response_sz = 1
> + * input: args[0] = DIMM address[7:0]
> + * output: args[0] = refresh rate[3] + temperature range[2:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_DIMM_POWER, num_args = 1, response_sz = 1
> + * input: args[0] = DIMM address[7:0]
> + * output: args[0] = DIMM power in mW[31:17] + update rate in ms[16:8] +
> + * DIMM address[7:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_DIMM_THERMAL, num_args = 1, response_sz = 1
> + * input: args[0] = DIMM address[7:0]
> + * output: args[0] = temperature in degree celcius[31:21] + update rate in ms[16:8] +
> + * DIMM address[7:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_SOCKET_FREQ_LIMIT, num_args = 0, response_sz = 1
> + * output: args[0] = frequency in MHz[31:16] + frequency source[15:0]
> + */
> + {0, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_CCLK_CORE_LIMIT, num_args = 1, response_sz = 1
> + * input: args[0] = apic id [31:0]
> + * output: args[0] = frequency in MHz[31:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_RAILS_SVI, num_args = 0, response_sz = 1
> + * output: args[0] = power in mW[31:0]
> + */
> + {0, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_SOCKET_FMAX_FMIN, num_args = 0, response_sz = 1
> + * output: args[0] = fmax in MHz[31:16] + fmin in MHz[15:0]
> + */
> + {0, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_IOLINK_BANDWITH, num_args = 1, response_sz = 1
> + * input: args[0] = link id[15:8] + bw type[2:0]
> + * output: args[0] = io bandwidth in Mbps[31:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_GET_XGMI_BANDWITH, num_args = 1, response_sz = 1
> + * input: args[0] = link id[15:8] + bw type[2:0]
> + * output: args[0] = xgmi bandwidth in Mbps[31:0]
> + */
> + {1, 1, HSMP_GET},
> +
> + /*
> + * HSMP_SET_GMI3_WIDTH, num_args = 1, response_sz = 0
> + * input: args[0] = min link width[15:8] + max link width[7:0]
> + */
> + {1, 0, HSMP_SET},
> +
> + /*
> + * HSMP_SET_PCI_RATE, num_args = 1, response_sz = 1
> + * input: args[0] = link rate control value
> + * output: args[0] = previous link rate control value
> + */
> + {1, 1, HSMP_SET},
> +
> + /*
> + * HSMP_SET_POWER_MODE, num_args = 1, response_sz = 0
> + * input: args[0] = power efficiency mode[2:0]
> + */
> + {1, 0, HSMP_SET},
> +
> + /*
> + * HSMP_SET_PSTATE_MAX_MIN, num_args = 1, response_sz = 0
> + * input: args[0] = min df pstate[15:8] + max df pstate[7:0]
> + */
> + {1, 0, HSMP_SET},
> };
>
> /* Reset to default packing */
Other than that I stand by my Reviewed-by!
Thanks,
Carlos
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