[Intel-gfx] [PATCH 04/15] drm/i915/guc/slpc: Adding SLPC communication interfaces

Vinay Belgaumkar
2021-07-26T19:08:47Z

Add constants and params that are needed to configure SLPC.

v2: Add a new abi header for SLPC. Replace bitfields with
genmasks. Address other comments from Michal W.

v3: Add slpc H2G format in abi, other review commments (Michal W)

v4: Update status bits according to latest spec

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
---
.../gpu/drm/i915/gt/uc/abi/guc_actions_abi.h | 1 -
.../drm/i915/gt/uc/abi/guc_actions_slpc_abi.h | 235 ++++++++++++++++++
drivers/gpu/drm/i915/gt/uc/intel_guc.c | 3 +
drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 7 +
4 files changed, 245 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/i915/gt/uc/abi/guc_actions_slpc_abi.h

diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
index d832c8f11c11..ca538e5de940 100644
--- a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_abi.h
@@ -135,7 +135,6 @@ enum intel_guc_action {
INTEL_GUC_ACTION_SET_CONTEXT_PREEMPTION_TIMEOUT = 0x1007,
INTEL_GUC_ACTION_CONTEXT_RESET_NOTIFICATION = 0x1008,
INTEL_GUC_ACTION_ENGINE_FAILURE_NOTIFICATION = 0x1009,
- INTEL_GUC_ACTION_SLPC_REQUEST = 0x3003,
INTEL_GUC_ACTION_AUTHENTICATE_HUC = 0x4000,
INTEL_GUC_ACTION_REGISTER_CONTEXT = 0x4502,
INTEL_GUC_ACTION_DEREGISTER_CONTEXT = 0x4503,
diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_slpc_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_slpc_abi.h
new file mode 100644
index 000000000000..70b300d4a536
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_actions_slpc_abi.h
@@ -0,0 +1,235 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _GUC_ACTIONS_SLPC_ABI_H_
+#define _GUC_ACTIONS_SLPC_ABI_H_
+
+#include <linux/types.h>
+
+/**
+ * DOC: SLPC SHARED DATA STRUCTURE
+ *
+ * +----+------+--------------------------------------------------------------+
+ * | CL | Bytes| Description |
+ * +====+======+==============================================================+
+ * | 1 | 0-3 | SHARED DATA SIZE |
+ * | +------+--------------------------------------------------------------+
+ * | | 4-7 | GLOBAL STATE |
+ * | +------+--------------------------------------------------------------+
+ * | | 8-11 | DISPLAY DATA ADDRESS |
+ * | +------+--------------------------------------------------------------+
+ * | | 12:63| PADDING |
+ * +----+------+--------------------------------------------------------------+
+ * | | 0:63 | PADDING(PLATFORM INFO) |
+ * +----+------+--------------------------------------------------------------+
+ * | 3 | 0-3 | TASK STATE DATA |
+ * + +------+--------------------------------------------------------------+
+ * | | 4:63 | PADDING |
+ * +----+------+--------------------------------------------------------------+
+ * |4-21|0:1087| OVERRIDE PARAMS AND BIT FIELDS |
+ * +----+------+--------------------------------------------------------------+
+ * | | | PADDING + EXTRA RESERVED PAGE |
+ * +----+------+--------------------------------------------------------------+
+ */
+
+/*
+ * SLPC exposes certain parameters for global configuration by the host.
+ * These are referred to as override parameters, because in most cases
+ * the host will not need to modify the default values used by SLPC.
+ * SLPC remembers the default values which allows the host to easily restore
+ * them by simply unsetting the override. The host can set or unset override
+ * parameters during SLPC (re-)initialization using the SLPC Reset event.
+ * The host can also set or unset override parameters on the fly using the
+ * Parameter Set and Parameter Unset events
+ */
+
+#define SLPC_MAX_OVERRIDE_PARAMETERS 256
+#define SLPC_OVERRIDE_BITFIELD_SIZE \
+ (SLPC_MAX_OVERRIDE_PARAMETERS / 32)
+
+#define SLPC_PAGE_SIZE_BYTES 4096
+#define SLPC_CACHELINE_SIZE_BYTES 64
+#define SLPC_SHARED_DATA_SIZE_BYTE_HEADER SLPC_CACHELINE_SIZE_BYTES
+#define SLPC_SHARED_DATA_SIZE_BYTE_PLATFORM_INFO SLPC_CACHELINE_SIZE_BYTES
+#define SLPC_SHARED_DATA_SIZE_BYTE_TASK_STATE SLPC_CACHELINE_SIZE_BYTES
+#define SLPC_SHARED_DATA_MODE_DEFN_TABLE_SIZE SLPC_PAGE_SIZE_BYTES
+#define SLPC_SHARED_DATA_SIZE_BYTE_MAX (2 * SLPC_PAGE_SIZE_BYTES)
+
+/*
+ * Cacheline size aligned (Total size needed for
+ * SLPM_KMD_MAX_OVERRIDE_PARAMETERS=256 is 1088 bytes)
+ */
+#define SLPC_OVERRIDE_PARAMS_TOTAL_BYTES (((((SLPC_MAX_OVERRIDE_PARAMETERS * 4) \
+ + ((SLPC_MAX_OVERRIDE_PARAMETERS / 32) * 4)) \
+ + (SLPC_CACHELINE_SIZE_BYTES-1)) / SLPC_CACHELINE_SIZE_BYTES)*SLPC_CACHELINE_SIZE_BYTES)
+
+#define SLPC_SHARED_DATA_SIZE_BYTE_OTHER (SLPC_SHARED_DATA_SIZE_BYTE_MAX - \
+ (SLPC_SHARED_DATA_SIZE_BYTE_HEADER \
+ + SLPC_SHARED_DATA_SIZE_BYTE_PLATFORM_INFO \
+ + SLPC_SHARED_DATA_SIZE_BYTE_TASK_STATE \
+ + SLPC_OVERRIDE_PARAMS_TOTAL_BYTES \
+ + SLPC_SHARED_DATA_MODE_DEFN_TABLE_SIZE))
+
+enum slpc_task_enable {
+ SLPC_PARAM_TASK_DEFAULT = 0,
+ SLPC_PARAM_TASK_ENABLED,
+ SLPC_PARAM_TASK_DISABLED,
+ SLPC_PARAM_TASK_UNKNOWN
+};
+
+enum slpc_global_state {
+ SLPC_GLOBAL_STATE_NOT_RUNNING = 0,
+ SLPC_GLOBAL_STATE_INITIALIZING = 1,
+ SLPC_GLOBAL_STATE_RESETTING = 2,
+ SLPC_GLOBAL_STATE_RUNNING = 3,
+ SLPC_GLOBAL_STATE_SHUTTING_DOWN = 4,
+ SLPC_GLOBAL_STATE_ERROR = 5
+};
+
+enum slpc_param_id {
+ SLPC_PARAM_TASK_ENABLE_GTPERF = 0,
+ SLPC_PARAM_TASK_DISABLE_GTPERF = 1,
+ SLPC_PARAM_TASK_ENABLE_BALANCER = 2,
+ SLPC_PARAM_TASK_DISABLE_BALANCER = 3,
+ SLPC_PARAM_TASK_ENABLE_DCC = 4,
+ SLPC_PARAM_TASK_DISABLE_DCC = 5,
+ SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ = 6,
+ SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ = 7,
+ SLPC_PARAM_GLOBAL_MIN_GT_SLICE_FREQ_MHZ = 8,
+ SLPC_PARAM_GLOBAL_MAX_GT_SLICE_FREQ_MHZ = 9,
+ SLPC_PARAM_GTPERF_THRESHOLD_MAX_FPS = 10,
+ SLPC_PARAM_GLOBAL_DISABLE_GT_FREQ_MANAGEMENT = 11,
+ SLPC_PARAM_GTPERF_ENABLE_FRAMERATE_STALLING = 12,
+ SLPC_PARAM_GLOBAL_DISABLE_RC6_MODE_CHANGE = 13,
+ SLPC_PARAM_GLOBAL_OC_UNSLICE_FREQ_MHZ = 14,
+ SLPC_PARAM_GLOBAL_OC_SLICE_FREQ_MHZ = 15,
+ SLPC_PARAM_GLOBAL_ENABLE_IA_GT_BALANCING = 16,
+ SLPC_PARAM_GLOBAL_ENABLE_ADAPTIVE_BURST_TURBO = 17,
+ SLPC_PARAM_GLOBAL_ENABLE_EVAL_MODE = 18,
+ SLPC_PARAM_GLOBAL_ENABLE_BALANCER_IN_NON_GAMING_MODE = 19,
+ SLPC_PARAM_GLOBAL_RT_MODE_TURBO_FREQ_DELTA_MHZ = 20,
+ SLPC_PARAM_PWRGATE_RC_MODE = 21,
+ SLPC_PARAM_EDR_MODE_COMPUTE_TIMEOUT_MS = 22,
+ SLPC_PARAM_EDR_QOS_FREQ_MHZ = 23,
+ SLPC_PARAM_MEDIA_FF_RATIO_MODE = 24,
+ SLPC_PARAM_ENABLE_IA_FREQ_LIMITING = 25,
+ SLPC_PARAM_STRATEGIES = 26,
+ SLPC_PARAM_POWER_PROFILE = 27,
+ SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY = 28,
+ SLPC_MAX_PARAM = 32,
+};
+
+enum slpc_event_id {
+ SLPC_EVENT_RESET = 0,
+ SLPC_EVENT_SHUTDOWN = 1,
+ SLPC_EVENT_PLATFORM_INFO_CHANGE = 2,
+ SLPC_EVENT_DISPLAY_MODE_CHANGE = 3,
+ SLPC_EVENT_FLIP_COMPLETE = 4,
+ SLPC_EVENT_QUERY_TASK_STATE = 5,
+ SLPC_EVENT_PARAMETER_SET = 6,
+ SLPC_EVENT_PARAMETER_UNSET = 7,
+};
+
+struct slpc_task_state_data {
+ union {
+ u32 task_status_padding;
+ struct {
+ u32 status;
+#define SLPC_GTPERF_TASK_ENABLED BIT(0)
+#define SLPC_DCC_TASK_ENABLED BIT(11)
+#define SLPC_IN_DCC BIT(12)
+#define SLPC_BALANCER_ENABLED BIT(15)
+#define SLPC_IBC_TASK_ENABLED BIT(16)
+#define SLPC_BALANCER_IA_LMT_ENABLED BIT(17)
+#define SLPC_BALANCER_IA_LMT_ACTIVE BIT(18)
+ };
+ };
+ union {
+ u32 freq_padding;
+ struct {
+#define SLPC_MAX_UNSLICE_FREQ_MASK REG_GENMASK(7, 0)
+#define SLPC_MIN_UNSLICE_FREQ_MASK REG_GENMASK(15, 8)
+#define SLPC_MAX_SLICE_FREQ_MASK REG_GENMASK(23, 16)
+#define SLPC_MIN_SLICE_FREQ_MASK REG_GENMASK(31, 24)
+ u32 freq;
+ };
+ };
+} __packed;
+
+struct slpc_shared_data_header {
+ /* Total size in bytes of this shared buffer. */
+ u32 size;
+ u32 global_state;
+ u32 display_data_addr;
+} __packed;
+
+struct slpc_override_params {
+ u32 bits[SLPC_OVERRIDE_BITFIELD_SIZE];
+ u32 values[SLPC_MAX_OVERRIDE_PARAMETERS];
+} __packed;
+
+struct slpc_shared_data {
+ struct slpc_shared_data_header header;
+ u8 shared_data_header_pad[SLPC_SHARED_DATA_SIZE_BYTE_HEADER -
+ sizeof(struct slpc_shared_data_header)];
+
+ u8 platform_info_pad[SLPC_SHARED_DATA_SIZE_BYTE_PLATFORM_INFO];
+
+ struct slpc_task_state_data task_state_data;
+ u8 task_state_data_pad[SLPC_SHARED_DATA_SIZE_BYTE_TASK_STATE -
+ sizeof(struct slpc_task_state_data)];
+
+ struct slpc_override_params override_params ;
+ u8 override_params_pad[SLPC_OVERRIDE_PARAMS_TOTAL_BYTES -
+ sizeof(struct slpc_override_params)];
+
+ u8 shared_data_pad[SLPC_SHARED_DATA_SIZE_BYTE_OTHER];
+
+ /* PAGE 2 (4096 bytes), mode based parameter will be removed soon */
+ u8 reserved_mode_definition[4096];
+} __packed;
+
+/**
+ * DOC: SLPC H2G MESSAGE FORMAT
+ *
+ * +---+-------+--------------------------------------------------------------+
+ * | | Bits | Description |
+ * +===+=======+==============================================================+
+ * | 0 | 31 | ORIGIN = GUC_HXG_ORIGIN_HOST_ |
+ * | +-------+--------------------------------------------------------------+
+ * | | 30:28 | TYPE = GUC_HXG_TYPE_REQUEST_ |
+ * | +-------+--------------------------------------------------------------+
+ * | | 27:16 | DATA0 = MBZ |
+ * | +-------+--------------------------------------------------------------+
+ * | | 15:0 | ACTION = _`GUC_ACTION_HOST2GUC_PC_SLPM_REQUEST` = 0x3003 |
+ * +---+-------+--------------------------------------------------------------+
+ * | 1 | 31:8 | **EVENT_ID** |
+ * + +-------+--------------------------------------------------------------+
+ * | | 7:0 | **EVENT_ARGC** - number of data arguments |
+ * +---+-------+--------------------------------------------------------------+
+ * | 2 | 31:0 | **EVENT_DATA1** |
+ * +---+-------+--------------------------------------------------------------+
+ * |...| 31:0 | ... |
+ * +---+-------+--------------------------------------------------------------+
+ * |2+n| 31:0 | **EVENT_DATAn** |
+ * +---+-------+--------------------------------------------------------------+
+ */
+
+#define INTEL_GUC_ACTION_SLPC_REQUEST 0x3003
+
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_MIN_LEN \
+ (GUC_HXG_REQUEST_MSG_MIN_LEN + 1u)
+#define HOST2GUC_PC_SLPC_EVENT_MAX_INPUT_ARGS 9
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_MAX_LEN \
+ (HOST2GUC_PC_SLPC_REQUEST_REQUEST_MSG_MIN_LEN + \
+ HOST2GUC_PC_SLPC_EVENT_MAX_INPUT_ARGS)
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_0_MBZ GUC_HXG_REQUEST_MSG_0_DATA0
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_1_EVENT_ID (0xff << 8)
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_1_EVENT_ARGC (0xff << 0)
+#define HOST2GUC_PC_SLPC_REQUEST_MSG_n_EVENT_DATAn GUC_HXG_REQUEST_MSG_n_DATAn
+
+#define HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_LEN \
+ (GUC_HXG_REQUEST_MSG_MIN_LEN + 1u)
+#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 39bc3c16057b..5b0f8c541b69 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -208,6 +208,9 @@ static u32 guc_ctl_feature_flags(struct intel_guc *guc)
if (!intel_guc_submission_is_used(guc))
flags |= GUC_CTL_DISABLE_SCHEDULER;

+ if (intel_guc_slpc_is_used(guc))
+ flags |= GUC_CTL_ENABLE_SLPC;
+
return flags;
}

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
index 82534259b7ad..6ec331b903a8 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h
@@ -12,6 +12,7 @@
#include "gt/intel_engine_types.h"

#include "abi/guc_actions_abi.h"
+#include "abi/guc_actions_slpc_abi.h"
#include "abi/guc_errors_abi.h"
#include "abi/guc_communication_mmio_abi.h"
#include "abi/guc_communication_ctb_abi.h"
@@ -95,6 +96,7 @@
#define GUC_CTL_WA 1
#define GUC_CTL_FEATURE 2
#define GUC_CTL_DISABLE_SCHEDULER (1 << 14)
+#define GUC_CTL_ENABLE_SLPC BIT(2)

#define GUC_CTL_DEBUG 3
#define GUC_LOG_VERBOSITY_SHIFT 0
@@ -141,6 +143,11 @@
#define GUC_ID_TO_ENGINE_INSTANCE(guc_id) \
(((guc_id) & GUC_ENGINE_INSTANCE_MASK) >> GUC_ENGINE_INSTANCE_SHIFT)

+#define SLPC_EVENT(id,c) (\
+FIELD_PREP(HOST2GUC_PC_SLPC_REQUEST_MSG_1_EVENT_ID, id) | \
+FIELD_PREP(HOST2GUC_PC_SLPC_REQUEST_MSG_1_EVENT_ARGC, c ) \
+)
+
static inline u8 engine_class_to_guc_class(u8 class)
{
BUILD_BUG_ON(GUC_RENDER_CLASS != RENDER_CLASS);
--
2.25.0