platform/x86/amd/hsmp: Add HSMP messages for Family 1Ah, Model 50h-5Fh

Family 1Ah Model 50h-5Fh firmware exposes new HSMP messages (0x29-0x2A,
0x33-0x3A) for PC6/CC6 control, CCD power/thermal monitoring, DIMM
sideband access, floor- and SDPS-limit control, and command-enable
discovery. The same firmware extends three existing SET-only messages
(HSMP_SET_XGMI_LINK_WIDTH 0x0C, HSMP_SET_DF_PSTATE 0x0D,
HSMP_SET_PSTATE_MAX_MIN 0x22) with a read-back path selected by bit[31]
of args[0] (0 = set, 1 = get). Add the new IDs and convert the three
messages to HSMP_SET_GET.

Also add PQoS-related HSMP messages HSMP_PQOS_TRAFFIC_PRIORITY (0x3B)
and HSMP_PQOS_FLOATING_BW (0x3C) with matching hsmp_msg_desc_table[]
descriptors so userspace can reach the new functionality.

Backward compatibility is preserved on prior platforms: new IDs
previously occupied HSMP_RSVD slots, and existing userspace that leaves
bit[31] = 0 continues to take a pure SET path. Converting the three
SET messages to HSMP_SET_GET also keeps them accepted by
validate_message(), which already applies a relaxed upper-bound check
on response_sz for that type.

Co-developed-by: Muthusamy Ramalingam <muthusamy.ramalingam@amd.com>
Signed-off-by: Muthusamy Ramalingam <muthusamy.ramalingam@amd.com>
Signed-off-by: Muralidhara M K <muralidhara.mk@amd.com>
Link: https://patch.msgid.link/20260727141542.3370108-2-muralidhara.mk@amd.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

1 files changed, 158 insertions, 14 deletions

diff --git a/arch/x86/include/uapi/asm/amd_hsmp.h b/arch/x86/include/uapi/asm/amd_hsmp.h
index 92d8f256d096..eff35c3c6ce0 100644
--- a/arch/x86/include/uapi/asm/amd_hsmp.h
+++ b/arch/x86/include/uapi/asm/amd_hsmp.h
@@ -53,9 +53,21 @@ enum hsmp_message_ids {
 	HSMP_SET_XGMI_PSTATE_RANGE,	/* 26h Set xGMI P-state range */
 	HSMP_CPU_RAIL_ISO_FREQ_POLICY,	/* 27h Get/Set Cpu Iso frequency policy */
 	HSMP_DFC_ENABLE_CTRL,		/* 28h Enable/Disable DF C-state */
+	HSMP_PC6_ENABLE,		/* 29h Get/Set PC6 enable/disable status */
+	HSMP_CC6_ENABLE,		/* 2Ah Get/Set CC6 enable/disable status */
 	HSMP_GET_RAPL_UNITS = 0x30,	/* 30h Get scaling factor for energy */
 	HSMP_GET_RAPL_CORE_COUNTER,	/* 31h Get core energy counter value */
 	HSMP_GET_RAPL_PACKAGE_COUNTER,	/* 32h Get package energy counter value */
+	HSMP_DIMM_SB_RD,		/* 33h Get DIMM sideband data */
+	HSMP_READ_CCD_POWER,		/* 34h Get average CCD power */
+	HSMP_READ_TDELTA,		/* 35h Get thermal behaviour */
+	HSMP_GET_SVI3_VR_CTRL_TEMP,	/* 36h Get SVI3 VR controller rail temp */
+	HSMP_GET_ENABLED_HSMP_CMDS,	/* 37h Get supported HSMP commands */
+	HSMP_SET_GET_FLOOR_LIMIT,	/* 38h Get/Set core floor frequency limit */
+	HSMP_DIMM_SB_WR,		/* 39h Set DIMM sideband data */
+	HSMP_SDPS_LIMIT,		/* 3Ah Get/Set SDPS limit */
+	HSMP_PQOS_TRAFFIC_PRIORITY,	/* 3Bh Get/Set traffic priority */
+	HSMP_PQOS_FLOATING_BW,		/* 3Ch Get/Set max floating bandwidth */
 	HSMP_MSG_ID_MAX,
 };
 
@@ -170,16 +182,27 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[]
 	{0, 1, HSMP_GET},
 
 	/*
-	 * HSMP_SET_XGMI_LINK_WIDTH, num_args = 1, response_sz = 0
-	 * input: args[0] = min link width[15:8] + max link width[7:0]
+	 * HSMP_SET_XGMI_LINK_WIDTH, num_args = 1, response_sz = 0/1
+	 * input: args[0] = set/get XGMI Link width[31] (0 = set, 1 = get) +
+	 *                  min link width[15:8] + max link width[7:0]
+	 *        Link width encoding: 0 = x4, 1 = x8, 2 = x16.
+	 *        On SET, max must be >= min.  On GET, [15:0] are reserved.
+	 * output: args[0] = reserved[31:16] + min link width[15:8] +
+	 *                   max link width[7:0]
 	 */
-	{1, 0, HSMP_SET},
+	{1, 1, HSMP_SET_GET},
 
 	/*
-	 * HSMP_SET_DF_PSTATE, num_args = 1, response_sz = 0
-	 * input: args[0] = df pstate[7:0]
+	 * HSMP_SET_DF_PSTATE (APBDisable), num_args = 1, response_sz = 0/1
+	 * input: args[0] = set APB_DISABLE / get APB state[31]
+	 *                  (0 = set & lock DF P-state, 1 = get) +
+	 *                  reserved[30:8] +
+	 *                  DF P-state[7:0] (0..2; reserved on GET)
+	 * output: args[0] = reserved[31:9] +
+	 *                   APB state[8] (1 = disabled, 0 = enabled) +
+	 *                   locked DF P-state[7:0] if [8] = 1, else reserved
 	 */
-	{1, 0, HSMP_SET},
+	{1, 1, HSMP_SET_GET},
 
 	/* HSMP_SET_AUTO_DF_PSTATE, num_args = 0, response_sz = 0 */
 	{0, 0, HSMP_SET},
@@ -305,16 +328,32 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[]
 	{1, 1, HSMP_SET},
 
 	/*
-	 * HSMP_SET_POWER_MODE, num_args = 1, response_sz = 0
-	 * input: args[0] = power efficiency mode[2:0]
+	 * HSMP_SET_POWER_MODE (PwrEfficiencyModeSelection),
+	 *	num_args = 1, response_sz = 1
+	 * input: args[0] = set/get policy[31] (0 = set, 1 = get) +
+	 *                  high util point[30:24] +
+	 *                  low util point[23:17] +
+	 *                  PPT limit[16:5] +
+	 *                  reserved[4:3] + mode selection[2:0]
+	 *        [30:5] are valid only when [2:0] is a balanced core mode
+	 *        (4 or 5). [2:0] is reserved when getting (bit[31] = 1).
+	 * output: args[0] same layout, [31] reserved, [2:0] = arbitrated
+	 *         current efficiency mode.
 	 */
 	{1, 1, HSMP_SET_GET},
 
 	/*
-	 * HSMP_SET_PSTATE_MAX_MIN, num_args = 1, response_sz = 0
-	 * input: args[0] = min df pstate[15:8] + max df pstate[7:0]
+	 * HSMP_SET_PSTATE_MAX_MIN (DfPstateRange), num_args = 1, response_sz = 0/1
+	 * input: args[0] = set/get DF P-state range[31] (0 = set, 1 = get) +
+	 *                  reserved[30:16] +
+	 *                  min DF P-state[15:8] + max DF P-state[7:0]
+	 *        DF P-state encoding: 0 = DFP0 (high performance),
+	 *                             1 = DFP1, 2 = DFP2 (low performance).
+	 *        [15:0] are reserved when getting (args[0] bit[31] = 1).
+	 * output: args[0] = reserved[31:16] + min DF P-state[15:8] +
+	 *                   max DF P-state[7:0]
 	 */
-	{1, 0, HSMP_SET},
+	{1, 1, HSMP_SET_GET},
 
 	/*
 	 * HSMP_GET_METRIC_TABLE_VER, num_args = 0, response_sz = 1
@@ -355,9 +394,31 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[]
 	 */
 	{1, 1, HSMP_SET_GET},
 
-	/* RESERVED(0x29-0x2f) */
-	{0, 0, HSMP_RSVD},
-	{0, 0, HSMP_RSVD},
+	/*
+	 * HSMP_PC6_ENABLE (Pc6Enable), num_args = 1, response_sz = 0/1
+	 * input: args[0] = set/get PC6 control[31] (0 = set, 1 = get) +
+	 *                  reserved[30:1] +
+	 *                  enable PC6[0] (0 = disable, 1 = enable;
+	 *                  reserved on GET)
+	 * output: args[0] = reserved[31:1] + current PC6 control[0]
+	 *                   (last value configured via HSMP or APML)
+	 */
+	{1, 1, HSMP_SET_GET},
+
+	/*
+	 * HSMP_CC6_ENABLE (CC6Enable), num_args = 1, response_sz = 0/1
+	 * Configures CC6 enable for all cores; changing the setting does
+	 * not by itself transition cores in or out of CC6.
+	 * input: args[0] = set/get CC6 control[31] (0 = set, 1 = get) +
+	 *                  reserved[30:1] +
+	 *                  enable CC6[0] (0 = disable, 1 = enable;
+	 *                  reserved on GET)
+	 * output: args[0] = reserved[31:1] + current CC6 control[0]
+	 *                   (last value configured via HSMP or APML)
+	 */
+	{1, 1, HSMP_SET_GET},
+
+	/* RESERVED(0x2B-0x2F) */
 	{0, 0, HSMP_RSVD},
 	{0, 0, HSMP_RSVD},
 	{0, 0, HSMP_RSVD},
@@ -385,6 +446,89 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[]
 	 */
 	{0, 2, HSMP_GET},
 
+	/*
+	 * HSMP_DIMM_SB_RD, num_args = 1, response_sz = 1
+	 * input: args[0] = reg space[23] + reg offset[22:12] +
+	 *                  device LID[11:8] + DIMM address[7:0]
+	 * output: args[0] = read data byte[3:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_READ_CCD_POWER, num_args = 1, response_sz = 1
+	 * input: args[0]  = apic id of core[15:0]
+	 * output: args[0] = CCD power(mWatts)[31:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_READ_TDELTA, num_args = 0, response_sz = 1
+	 * output: args[0] = thermal behaviour[31:0]
+	 */
+	{0, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_SVI3_VR_CTRL_TEMP, num_args = 1, response_sz = 1
+	 * input: args[0] = SVI3 rail index[3:1] + read temperature[0]
+	 * output: args[0] = SVI3 rail index[30:28] +
+	 *                   rail temperature in degree C[27:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_ENABLED_HSMP_CMDS, num_args = 1, response_sz = 3
+	 * input: args[0] = HSMP command mask[0]
+	 * output: status of HSMP command = args[0], args[1], args[2]
+	 */
+	{1, 3, HSMP_GET},
+
+	/*
+	 * HSMP_SET_GET_FLOOR_LIMIT, num_args = 1, response_sz = 1
+	 * input: args[0] = op[31:30] + reserved[29:28] +
+	 *                  apic id[27:16] + floor frequency MHz[15:0]
+	 *        op encoding: 00 = set per-core floor,
+	 *                     01 = set all-cores floor (apic id reserved),
+	 *                     10 = get per-core floor,
+	 *                     11 = get per-core effective floor.
+	 *        Floor frequency field is reserved on GET (bit[31] = 1).
+	 * output: args[0] = floor frequency MHz[15:0]
+	 *                   (effective for op 11, configured for op 10;
+	 *                   reserved on SET)
+	 */
+	{1, 1, HSMP_SET_GET},
+
+	/*
+	 * HSMP_DIMM_SB_WR, num_args = 1, response_sz = 0
+	 * input: args[0] = write data[31:24] + reg space[23] +
+	 *                  reg offset[22:12] + device LID[11:8] +
+	 *                  DIMM address[7:0]
+	 */
+	{1, 0, HSMP_SET},
+
+	/*
+	 * HSMP_SDPS_LIMIT, num_args = 1, response_sz = 1
+	 * input: args[0] = set/get SDPS limit[31] (0 = set, 1 = get) +
+	 *                  SDPS limit[30:0]
+	 * output: args[0] = SDPS limit[30:0]
+	 */
+	{1, 1, HSMP_SET_GET},
+
+	/*
+	 * HSMP_PQOS_TRAFFIC_PRIORITY, num_args = 1, response_sz = 1
+	 * input: args[0] = op[31:30] + priority sel[27:26] +
+	 *                  priority val[21:20] + input[19:0]
+	 * output: args[0] = supported priorities or priority val[1:0]
+	 */
+	{1, 1, HSMP_SET_GET},
+
+	/*
+	 * HSMP_PQOS_FLOATING_BW, num_args = 1, response_sz = 2
+	 * input: args[0] = op[31] + sub-op[30:29] + params[28:0]
+	 * output: args[0] = discovery bits or floating/global memory BW (Gbps)
+	 * output: args[1] = reserved or config (drop adj, sampling delay,
+	 *                   hysteresis)
+	 */
+	{1, 2, HSMP_SET_GET},
 };
 
 /* Metrics table (supported only with proto version 6) */