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

Michal Wajdeczko
2021-07-27T13:59:36Z

On 26.07.2021 21:07, Vinay Belgaumkar wrote:
> 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)

as you are using REG_GENMASK below then you should be consistent and use
REG_BIT here and include "i915_reg.h" where both are defined, but then
it's no longer pure ABI header, but not a blocker

> + };
> + };
> + 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

likely you want to use
GUC_ACTION_HOST2GUC_PC_SLPM_REQUEST

> +
> +#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)

this one does not belong here

other LGTM,

Michal

> +#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);