Add macros to check for SLPC support. This feature is currently supported for Gen12+ and enabled whenever GuC submission is enabled/selected.

Include templates for SLPC init/fini and enable.

v2: Move SLPC helper functions to intel_guc_slpc.c/.h. Define basic template for SLPC structure in intel_guc_slpc_types.h. Fix copyright (Michal W)

v3: Review comments (Michal W)

v4: Include supported/selected inside slpc struct (Michal W)

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com Signed-off-by: Sundaresan Sujaritha sujaritha.sundaresan@intel.com Signed-off-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/gt/uc/intel_guc.c | 2 + drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 + drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 45 +++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 33 ++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 16 +++++++ drivers/gpu/drm/i915/gt/uc/intel_uc.c | 6 ++- drivers/gpu/drm/i915/gt/uc/intel_uc.h | 2 + 8 files changed, 105 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index ab7679957623..d8eac4468df9 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -186,6 +186,7 @@ i915-y += gt/uc/intel_uc.o \ gt/uc/intel_guc_fw.o \ gt/uc/intel_guc_log.o \ gt/uc/intel_guc_log_debugfs.o \ + gt/uc/intel_guc_slpc.o \ gt/uc/intel_guc_submission.o \ gt/uc/intel_huc.o \ gt/uc/intel_huc_debugfs.o \ diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c index 979128e28372..39bc3c16057b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c @@ -7,6 +7,7 @@ #include "gt/intel_gt_irq.h" #include "gt/intel_gt_pm_irq.h" #include "intel_guc.h" +#include "intel_guc_slpc.h" #include "intel_guc_ads.h" #include "intel_guc_submission.h" #include "i915_drv.h" @@ -157,6 +158,7 @@ void intel_guc_init_early(struct intel_guc *guc) intel_guc_ct_init_early(&guc->ct); intel_guc_log_init_early(&guc->log); intel_guc_submission_init_early(guc); + intel_guc_slpc_init_early(&guc->slpc);

mutex_init(&guc->send_mutex); spin_lock_init(&guc->irq_lock); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h index a9547069ee7e..7da11a0b6059 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h @@ -15,6 +15,7 @@ #include "intel_guc_ct.h" #include "intel_guc_log.h" #include "intel_guc_reg.h" +#include "intel_guc_slpc_types.h" #include "intel_uc_fw.h" #include "i915_utils.h" #include "i915_vma.h" @@ -30,6 +31,7 @@ struct intel_guc { struct intel_uc_fw fw; struct intel_guc_log log; struct intel_guc_ct ct; + struct intel_guc_slpc slpc;

/* Global engine used to submit requests to GuC */ struct i915_sched_engine *sched_engine; diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c new file mode 100644 index 000000000000..40950f1bf05c --- /dev/null +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "i915_drv.h" +#include "intel_guc_slpc.h" +#include "gt/intel_gt.h" + +static inline struct intel_guc *slpc_to_guc(struct intel_guc_slpc *slpc) +{ + return container_of(slpc, struct intel_guc, slpc); +} + +static bool __detect_slpc_supported(struct intel_guc *guc) +{ + /* GuC SLPC is unavailable for pre-Gen12 */ + return guc->submission_supported && + GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12; +} + +static bool __guc_slpc_selected(struct intel_guc *guc) +{ + if (!intel_guc_slpc_is_supported(guc)) + return false; + + return guc->submission_selected; +} + +void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc) +{ + struct intel_guc *guc = slpc_to_guc(slpc); + + slpc->supported = __detect_slpc_supported(guc); + slpc->selected = __guc_slpc_selected(guc); +} + +int intel_guc_slpc_init(struct intel_guc_slpc *slpc) +{ + return 0; +} + +void intel_guc_slpc_fini(struct intel_guc_slpc *slpc) +{ +} diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h new file mode 100644 index 000000000000..bc139682ad0f --- /dev/null +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef _INTEL_GUC_SLPC_H_ +#define _INTEL_GUC_SLPC_H_ + +#include "intel_guc_submission.h" +#include "intel_guc_slpc_types.h" + +static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc) +{ + return guc->slpc.supported; +} + +static inline bool intel_guc_slpc_is_wanted(struct intel_guc *guc) +{ + return guc->slpc.selected; +} + +static inline bool intel_guc_slpc_is_used(struct intel_guc *guc) +{ + return intel_guc_submission_is_used(guc) && intel_guc_slpc_is_wanted(guc); +} + +void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc); + +int intel_guc_slpc_init(struct intel_guc_slpc *slpc); +int intel_guc_slpc_enable(struct intel_guc_slpc *slpc); +void intel_guc_slpc_fini(struct intel_guc_slpc *slpc); + +#endif diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h new file mode 100644 index 000000000000..769c162305a0 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef _INTEL_GUC_SLPC_TYPES_H_ +#define _INTEL_GUC_SLPC_TYPES_H_ + +#include <linux/types.h> + +struct intel_guc_slpc { + bool supported; + bool selected; +}; + +#endif diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c index da57d18d9f6b..e6bd9406c7b2 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c @@ -75,16 +75,18 @@ static void __confirm_options(struct intel_uc *uc) struct drm_i915_private *i915 = uc_to_gt(uc)->i915;

drm_dbg(&i915->drm, - "enable_guc=%d (guc:%s submission:%s huc:%s)\n", + "enable_guc=%d (guc:%s submission:%s huc:%s slpc:%s)\n", i915->params.enable_guc, yesno(intel_uc_wants_guc(uc)), yesno(intel_uc_wants_guc_submission(uc)), - yesno(intel_uc_wants_huc(uc))); + yesno(intel_uc_wants_huc(uc)), + yesno(intel_uc_wants_guc_slpc(uc)));

if (i915->params.enable_guc == 0) { GEM_BUG_ON(intel_uc_wants_guc(uc)); GEM_BUG_ON(intel_uc_wants_guc_submission(uc)); GEM_BUG_ON(intel_uc_wants_huc(uc)); + GEM_BUG_ON(intel_uc_wants_guc_slpc(uc)); return; }

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.h b/drivers/gpu/drm/i915/gt/uc/intel_uc.h index e2da2b6e76e1..925a58ca6b94 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.h @@ -8,6 +8,7 @@

#include "intel_guc.h" #include "intel_guc_submission.h" +#include "intel_guc_slpc.h" #include "intel_huc.h" #include "i915_params.h"

@@ -83,6 +84,7 @@ __uc_state_checker(x, func, uses, used) uc_state_checkers(guc, guc); uc_state_checkers(huc, huc); uc_state_checkers(guc, guc_submission); +uc_state_checkers(guc, guc_slpc);

#undef uc_state_checkers #undef __uc_state_checker

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

v5: checkpatch()

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com 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..7a8d4bfc5f6a --- /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> +#include "i915_reg.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 REG_BIT(0) +#define SLPC_DCC_TASK_ENABLED REG_BIT(11) +#define SLPC_IN_DCC REG_BIT(12) +#define SLPC_BALANCER_ENABLED REG_BIT(15) +#define SLPC_IBC_TASK_ENABLED REG_BIT(16) +#define SLPC_BALANCER_IA_LMT_ENABLED REG_BIT(17) +#define SLPC_BALANCER_IA_LMT_ACTIVE REG_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 GUC_ACTION_HOST2GUC_PC_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_DATA_N GUC_HXG_REQUEST_MSG_n_DATAn + +#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..fa4be13c8854 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);

Add methods for interacting with GuC for enabling SLPC. Enable SLPC after GuC submission has been established. GuC load will fail if SLPC cannot be successfully initialized. Add various helper methods to set/unset the parameters for SLPC. They can be set using H2G calls or directly setting bits in the shared data structure.

v2: Address several review comments, add new helpers for decoding the SLPC min/max frequencies. Use masks instead of hardcoded constants. (Michal W)

v3: Split global_state_to_string function, and check for positive non-zero return value from intel_guc_send() (Michal W)

v4: Optimize the stringify function and other comments (Michal W)

v5: Enable slpc as well before declaring GuC submission status (Michal W)

v6: Checkpatch()

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com Signed-off-by: Sundaresan Sujaritha sujaritha.sundaresan@intel.com --- drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 202 ++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 2 + drivers/gpu/drm/i915/gt/uc/intel_uc.c | 11 + 3 files changed, 215 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index 377e09187e9f..f26cf07ec87b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -45,6 +45,40 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc) slpc->selected = __guc_slpc_selected(guc); }

+static void slpc_mem_set_param(struct slpc_shared_data *data, + u32 id, u32 value) +{ + GEM_BUG_ON(id >= SLPC_MAX_OVERRIDE_PARAMETERS); + /* + * When the flag bit is set, corresponding value will be read + * and applied by SLPC. + */ + data->override_params.bits[id >> 5] |= (1 << (id % 32)); + data->override_params.values[id] = value; +} + +static void slpc_mem_set_enabled(struct slpc_shared_data *data, + u8 enable_id, u8 disable_id) +{ + /* + * Enabling a param involves setting the enable_id + * to 1 and disable_id to 0. + */ + slpc_mem_set_param(data, enable_id, 1); + slpc_mem_set_param(data, disable_id, 0); +} + +static void slpc_mem_set_disabled(struct slpc_shared_data *data, + u8 enable_id, u8 disable_id) +{ + /* + * Disabling a param involves setting the enable_id + * to 0 and disable_id to 1. + */ + slpc_mem_set_param(data, disable_id, 1); + slpc_mem_set_param(data, enable_id, 0); +} + int intel_guc_slpc_init(struct intel_guc_slpc *slpc) { struct intel_guc *guc = slpc_to_guc(slpc); @@ -65,6 +99,174 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc) return err; }

+static u32 slpc_get_state(struct intel_guc_slpc *slpc) +{ + struct slpc_shared_data *data; + + GEM_BUG_ON(!slpc->vma); + + drm_clflush_virt_range(slpc->vaddr, sizeof(u32)); + data = slpc->vaddr; + + return data->header.global_state; +} + +static bool slpc_is_running(struct intel_guc_slpc *slpc) +{ + return slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING; +} + +static int guc_action_slpc_query(struct intel_guc *guc, u32 offset) +{ + u32 request[] = { + GUC_ACTION_HOST2GUC_PC_SLPC_REQUEST, + SLPC_EVENT(SLPC_EVENT_QUERY_TASK_STATE, 2), + offset, + 0, + }; + int ret; + + ret = intel_guc_send(guc, request, ARRAY_SIZE(request)); + + return ret > 0 ? -EPROTO : ret; +} + +static int slpc_query_task_state(struct intel_guc_slpc *slpc) +{ + struct intel_guc *guc = slpc_to_guc(slpc); + struct drm_i915_private *i915 = slpc_to_i915(slpc); + u32 offset = intel_guc_ggtt_offset(guc, slpc->vma); + int ret; + + ret = guc_action_slpc_query(guc, offset); + if (unlikely(ret)) + drm_err(&i915->drm, "Failed to query task state (%pe)\n", + ERR_PTR(ret)); + + drm_clflush_virt_range(slpc->vaddr, SLPC_PAGE_SIZE_BYTES); + + return ret; +} + +static const char *slpc_global_state_to_string(enum slpc_global_state state) +{ + switch (state) { + case SLPC_GLOBAL_STATE_NOT_RUNNING: + return "not running"; + case SLPC_GLOBAL_STATE_INITIALIZING: + return "initializing"; + case SLPC_GLOBAL_STATE_RESETTING: + return "resetting"; + case SLPC_GLOBAL_STATE_RUNNING: + return "running"; + case SLPC_GLOBAL_STATE_SHUTTING_DOWN: + return "shutting down"; + case SLPC_GLOBAL_STATE_ERROR: + return "error"; + default: + return "unknown"; + } +} + +static const char *slpc_get_state_string(struct intel_guc_slpc *slpc) +{ + return slpc_global_state_to_string(slpc_get_state(slpc)); +} + +static int guc_action_slpc_reset(struct intel_guc *guc, u32 offset) +{ + u32 request[] = { + GUC_ACTION_HOST2GUC_PC_SLPC_REQUEST, + SLPC_EVENT(SLPC_EVENT_RESET, 2), + offset, + 0, + }; + int ret; + + ret = intel_guc_send(guc, request, ARRAY_SIZE(request)); + + return ret > 0 ? -EPROTO : ret; +} + +static int slpc_reset(struct intel_guc_slpc *slpc) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + struct intel_guc *guc = slpc_to_guc(slpc); + u32 offset = intel_guc_ggtt_offset(guc, slpc->vma); + int ret; + + ret = guc_action_slpc_reset(guc, offset); + + if (unlikely(ret < 0)) { + drm_err(&i915->drm, "SLPC reset action failed (%pe)\n", + ERR_PTR(ret)); + return ret; + } + + if (!ret) { + if (wait_for(slpc_is_running(slpc), SLPC_RESET_TIMEOUT_MS)) { + drm_err(&i915->drm, "SLPC not enabled! State = %s\n", + slpc_get_state_string(slpc)); + return -EIO; + } + } + + return 0; +} + +static void slpc_shared_data_reset(struct slpc_shared_data *data) +{ + memset(data, 0, sizeof(struct slpc_shared_data)); + + data->header.size = sizeof(struct slpc_shared_data); + + /* Enable only GTPERF task, disable others */ + slpc_mem_set_enabled(data, SLPC_PARAM_TASK_ENABLE_GTPERF, + SLPC_PARAM_TASK_DISABLE_GTPERF); + + slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_BALANCER, + SLPC_PARAM_TASK_DISABLE_BALANCER); + + slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_DCC, + SLPC_PARAM_TASK_DISABLE_DCC); +} + +/* + * intel_guc_slpc_enable() - Start SLPC + * @slpc: pointer to intel_guc_slpc. + * + * SLPC is enabled by setting up the shared data structure and + * sending reset event to GuC SLPC. Initial data is setup in + * intel_guc_slpc_init. Here we send the reset event. We do + * not currently need a slpc_disable since this is taken care + * of automatically when a reset/suspend occurs and the GuC + * CTB is destroyed. + * + * Return: 0 on success, non-zero error code on failure. + */ +int intel_guc_slpc_enable(struct intel_guc_slpc *slpc) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + int ret; + + GEM_BUG_ON(!slpc->vma); + + slpc_shared_data_reset(slpc->vaddr); + + ret = slpc_reset(slpc); + if (unlikely(ret < 0)) { + drm_err(&i915->drm, "SLPC Reset event returned (%pe)\n", + ERR_PTR(ret)); + return ret; + } + + ret = slpc_query_task_state(slpc); + if (unlikely(ret < 0)) + return ret; + + return 0; +} + void intel_guc_slpc_fini(struct intel_guc_slpc *slpc) { if (!slpc->vma) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h index 8bd753167234..3cefe19b17b2 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h @@ -8,6 +8,8 @@

#include <linux/types.h>

+#define SLPC_RESET_TIMEOUT_MS 5 + struct intel_guc_slpc { struct i915_vma *vma; struct slpc_shared_data *vaddr; diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c index e6bd9406c7b2..3e0cd1f05e3b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c @@ -500,12 +500,21 @@ static int __uc_init_hw(struct intel_uc *uc) if (intel_uc_uses_guc_submission(uc)) intel_guc_submission_enable(guc);

+ if (intel_uc_uses_guc_slpc(uc)) { + ret = intel_guc_slpc_enable(&guc->slpc); + if (ret) + goto err_submission; + } + drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n", intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_GUC), guc->fw.path, guc->fw.major_ver_found, guc->fw.minor_ver_found, "submission", enableddisabled(intel_uc_uses_guc_submission(uc)));

+ drm_info(&i915->drm, "GuC SLPC: %s\n", + enableddisabled(intel_uc_uses_guc_slpc(uc))); + if (intel_uc_uses_huc(uc)) { drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n", intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC), @@ -520,6 +529,8 @@ static int __uc_init_hw(struct intel_uc *uc) /* * We've failed to load the firmware :( */ +err_submission: + intel_guc_submission_disable(guc); err_log_capture: __uc_capture_load_err_log(uc); err_out:

Add param set h2g helpers to set the min and max frequencies for use by SLPC.

v2: Address review comments (Michal W) v3: Check for positive error code (Michal W) v4: Print generic error in set_param (Michal W)

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Sundaresan Sujaritha sujaritha.sundaresan@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com --- drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 89 +++++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 2 + 2 files changed, 91 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index f26cf07ec87b..2635feb59576 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -111,6 +111,21 @@ static u32 slpc_get_state(struct intel_guc_slpc *slpc) return data->header.global_state; }

+static int guc_action_slpc_set_param(struct intel_guc *guc, u8 id, u32 value) +{ + u32 request[] = { + GUC_ACTION_HOST2GUC_PC_SLPC_REQUEST, + SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2), + id, + value, + }; + int ret; + + ret = intel_guc_send(guc, request, ARRAY_SIZE(request)); + + return ret > 0 ? -EPROTO : ret; +} + static bool slpc_is_running(struct intel_guc_slpc *slpc) { return slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING; @@ -148,6 +163,22 @@ static int slpc_query_task_state(struct intel_guc_slpc *slpc) return ret; }

+static int slpc_set_param(struct intel_guc_slpc *slpc, u8 id, u32 value) +{ + struct intel_guc *guc = slpc_to_guc(slpc); + struct drm_i915_private *i915 = slpc_to_i915(slpc); + int ret; + + GEM_BUG_ON(id >= SLPC_MAX_PARAM); + + ret = guc_action_slpc_set_param(guc, id, value); + if (ret) + drm_err(&i915->drm, "Failed to set param %d to %u (%pe)\n", + id, value, ERR_PTR(ret)); + + return ret; +} + static const char *slpc_global_state_to_string(enum slpc_global_state state) { switch (state) { @@ -231,6 +262,64 @@ static void slpc_shared_data_reset(struct slpc_shared_data *data) SLPC_PARAM_TASK_DISABLE_DCC); }

+/** + * intel_guc_slpc_set_max_freq() - Set max frequency limit for SLPC. + * @slpc: pointer to intel_guc_slpc. + * @val: frequency (MHz) + * + * This function will invoke GuC SLPC action to update the max frequency + * limit for unslice. + * + * Return: 0 on success, non-zero error code on failure. + */ +int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + intel_wakeref_t wakeref; + int ret; + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + ret = slpc_set_param(slpc, + SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ, + val); + + /* Return standardized err code for sysfs calls */ + if (ret) + ret = -EIO; + } + + return ret; +} + +/** + * intel_guc_slpc_set_min_freq() - Set min frequency limit for SLPC. + * @slpc: pointer to intel_guc_slpc. + * @val: frequency (MHz) + * + * This function will invoke GuC SLPC action to update the min unslice + * frequency. + * + * Return: 0 on success, non-zero error code on failure. + */ +int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + intel_wakeref_t wakeref; + int ret; + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + ret = slpc_set_param(slpc, + SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ, + val); + + /* Return standardized err code for sysfs calls */ + if (ret) + ret = -EIO; + } + + return ret; +} + /* * intel_guc_slpc_enable() - Start SLPC * @slpc: pointer to intel_guc_slpc. diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h index bc139682ad0f..788d87ff7b58 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h @@ -29,5 +29,7 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc); int intel_guc_slpc_init(struct intel_guc_slpc *slpc); int intel_guc_slpc_enable(struct intel_guc_slpc *slpc); void intel_guc_slpc_fini(struct intel_guc_slpc *slpc); +int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val); +int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val);

#endif

This prints out relevant SLPC info from the SLPC shared structure.

We will send a H2G message which forces SLPC to update the shared data structure with latest information before reading it.

v2: Address review comments (Michal W) v3: Remove unnecessary tasks from slpc_info (Michal W) v4: Rename function to intel_guc_slpc_print_info() (Michal W) v5: checkpatch()

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com Signed-off-by: Sundaresan Sujaritha sujaritha.sundaresan@intel.com --- .../gpu/drm/i915/gt/uc/intel_guc_debugfs.c | 22 ++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 29 +++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 3 ++ 3 files changed, 54 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c index 72ddfff42f7d..887c8c8f35db 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c @@ -12,6 +12,7 @@ #include "gt/uc/intel_guc_ct.h" #include "gt/uc/intel_guc_ads.h" #include "gt/uc/intel_guc_submission.h" +#include "gt/uc/intel_guc_slpc.h"

static int guc_info_show(struct seq_file *m, void *data) { @@ -50,11 +51,32 @@ static int guc_registered_contexts_show(struct seq_file *m, void *data) } DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_registered_contexts);

+static int guc_slpc_info_show(struct seq_file *m, void *unused) +{ + struct intel_guc *guc = m->private; + struct intel_guc_slpc *slpc = &guc->slpc; + struct drm_printer p = drm_seq_file_printer(m); + + if (!intel_guc_slpc_is_used(guc)) + return -ENODEV; + + return intel_guc_slpc_print_info(slpc, &p); +} +DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_slpc_info); + +static bool intel_eval_slpc_support(void *data) +{ + struct intel_guc *guc = (struct intel_guc *)data; + + return intel_guc_slpc_is_used(guc); +} + void intel_guc_debugfs_register(struct intel_guc *guc, struct dentry *root) { static const struct debugfs_gt_file files[] = { { "guc_info", &guc_info_fops, NULL }, { "guc_registered_contexts", &guc_registered_contexts_fops, NULL }, + { "guc_slpc_info", &guc_slpc_info_fops, &intel_eval_slpc_support}, };

if (!intel_guc_is_supported(guc)) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index 8bfd1880b2f5..4bf7c150330a 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -432,6 +432,35 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc) return 0; }

+int intel_guc_slpc_print_info(struct intel_guc_slpc *slpc, struct drm_printer *p) +{ + struct drm_i915_private *i915 = slpc_to_i915(slpc); + struct slpc_shared_data *data = slpc->vaddr; + struct slpc_task_state_data *slpc_tasks; + intel_wakeref_t wakeref; + int ret = 0; + + GEM_BUG_ON(!slpc->vma); + + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { + ret = slpc_query_task_state(slpc); + + if (!ret) { + slpc_tasks = &data->task_state_data; + + drm_printf(p, "\tSLPC state: %s\n", slpc_get_state_string(slpc)); + drm_printf(p, "\tGTPERF task active: %s\n", + yesno(slpc_tasks->status & SLPC_GTPERF_TASK_ENABLED)); + drm_printf(p, "\tMax freq: %u MHz\n", + slpc_decode_max_freq(slpc)); + drm_printf(p, "\tMin freq: %u MHz\n", + slpc_decode_min_freq(slpc)); + } + } + + return ret; +} + void intel_guc_slpc_fini(struct intel_guc_slpc *slpc) { if (!slpc->vma) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h index 78a7893ce489..3ffd4f2e3151 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h @@ -9,6 +9,8 @@ #include "intel_guc_submission.h" #include "intel_guc_slpc_types.h"

+struct drm_printer; + static inline bool intel_guc_slpc_is_supported(struct intel_guc *guc) { return guc->slpc.supported; @@ -33,5 +35,6 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val); int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val); int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val); int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val); +int intel_guc_slpc_print_info(struct intel_guc_slpc *slpc, struct drm_printer *p);

#endif

Cache rp0, rp1 and rpn platform limits into SLPC structure for range checking while setting min/max frequencies.

Also add "soft" limits which keep track of frequency changes made from userland. These are initially set to platform min and max.

v2: Address review comments (Michal W) v3: Formatting (Michal W) v4: Add separate function to parse rp values (Michal W) v5: Perform range checking for set min/max (Michal W) v6: checkpatch() and rename static functions (Michal W) v7: check ret code while setting SLPC limits (Michal W)

Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com --- drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 139 ++++++++++++++++++ .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 9 ++ drivers/gpu/drm/i915/i915_reg.h | 3 + 3 files changed, 151 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c index ebabc84d4e39..65a3e7fdb2b2 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -96,6 +96,9 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc) return err; }

+ slpc->max_freq_softlimit = 0; + slpc->min_freq_softlimit = 0; + return err; }

@@ -126,6 +129,17 @@ static int guc_action_slpc_set_param(struct intel_guc *guc, u8 id, u32 value) return ret > 0 ? -EPROTO : ret; }

+static int guc_action_slpc_unset_param(struct intel_guc *guc, u8 id) +{ + u32 request[] = { + GUC_ACTION_HOST2GUC_PC_SLPC_REQUEST, + SLPC_EVENT(SLPC_EVENT_PARAMETER_UNSET, 2), + id, + }; + + return intel_guc_send(guc, request, ARRAY_SIZE(request)); +} + static bool slpc_is_running(struct intel_guc_slpc *slpc) { return slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING; @@ -179,6 +193,16 @@ static int slpc_set_param(struct intel_guc_slpc *slpc, u8 id, u32 value) return ret; }

+static int slpc_unset_param(struct intel_guc_slpc *slpc, + u8 id) +{ + struct intel_guc *guc = slpc_to_guc(slpc); + + GEM_BUG_ON(id >= SLPC_MAX_PARAM); + + return guc_action_slpc_unset_param(guc, id); +} + static const char *slpc_global_state_to_string(enum slpc_global_state state) { switch (state) { @@ -300,6 +324,11 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val) intel_wakeref_t wakeref; int ret;

+ if (val < slpc->min_freq || + val > slpc->rp0_freq || + val < slpc->min_freq_softlimit) + return -EINVAL; + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { ret = slpc_set_param(slpc, SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ, @@ -310,6 +339,9 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val) ret = -EIO; }

+ if (!ret) + slpc->max_freq_softlimit = val; + return ret; }

@@ -356,6 +388,11 @@ int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val) intel_wakeref_t wakeref; int ret;

+ if (val < slpc->min_freq || + val > slpc->rp0_freq || + val > slpc->max_freq_softlimit) + return -EINVAL; + with_intel_runtime_pm(&i915->runtime_pm, wakeref) { ret = slpc_set_param(slpc, SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ, @@ -366,6 +403,9 @@ int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val) ret = -EIO; }

+ if (!ret) + slpc->min_freq_softlimit = val; + return ret; }

@@ -411,6 +451,79 @@ void intel_guc_pm_intrmsk_enable(struct intel_gt *gt) GEN6_PMINTRMSK, pm_intrmsk_mbz, 0); }

+static int slpc_set_softlimits(struct intel_guc_slpc *slpc) +{ + int ret = 0; + + /* + * Softlimits are initially equivalent to platform limits + * unless they have deviated from defaults, in which case, + * we retain the values and set min/max accordingly. + */ + if (!slpc->max_freq_softlimit) + slpc->max_freq_softlimit = slpc->rp0_freq; + else if (slpc->max_freq_softlimit != slpc->rp0_freq) + ret = intel_guc_slpc_set_max_freq(slpc, + slpc->max_freq_softlimit); + + if (unlikely(ret)) + return ret; + + if (!slpc->min_freq_softlimit) + slpc->min_freq_softlimit = slpc->min_freq; + else if (slpc->min_freq_softlimit != slpc->min_freq) + return intel_guc_slpc_set_min_freq(slpc, + slpc->min_freq_softlimit); + + return 0; +} + +static int slpc_ignore_eff_freq(struct intel_guc_slpc *slpc, bool ignore) +{ + int ret = 0; + + if (ignore) { + ret = slpc_set_param(slpc, + SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY, + ignore); + if (!ret) + return slpc_set_param(slpc, + SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ, + slpc->min_freq); + } else { + ret = slpc_unset_param(slpc, + SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY); + if (!ret) + return slpc_unset_param(slpc, + SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ); + } + + return ret; +} + +static int slpc_use_fused_rp0(struct intel_guc_slpc *slpc) +{ + /* Force SLPC to used platform rp0 */ + return slpc_set_param(slpc, + SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ, + slpc->rp0_freq); +} + +static void slpc_get_rp_values(struct intel_guc_slpc *slpc) +{ + u32 rp_state_cap; + + rp_state_cap = intel_uncore_read(slpc_to_gt(slpc)->uncore, + GEN6_RP_STATE_CAP); + + slpc->rp0_freq = REG_FIELD_GET(RP0_CAP_MASK, rp_state_cap) * + GT_FREQUENCY_MULTIPLIER; + slpc->rp1_freq = REG_FIELD_GET(RP1_CAP_MASK, rp_state_cap) * + GT_FREQUENCY_MULTIPLIER; + slpc->min_freq = REG_FIELD_GET(RPN_CAP_MASK, rp_state_cap) * + GT_FREQUENCY_MULTIPLIER; +} + /* * intel_guc_slpc_enable() - Start SLPC * @slpc: pointer to intel_guc_slpc. @@ -446,6 +559,32 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)

intel_guc_pm_intrmsk_enable(&i915->gt);

+ slpc_get_rp_values(slpc); + + /* Ignore efficient freq and set min to platform min */ + ret = slpc_ignore_eff_freq(slpc, true); + if (unlikely(ret)) { + drm_err(&i915->drm, "Failed to set SLPC min to RPn (%pe)\n", + ERR_PTR(ret)); + return ret; + } + + /* Set SLPC max limit to RP0 */ + ret = slpc_use_fused_rp0(slpc); + if (unlikely(ret)) { + drm_err(&i915->drm, "Failed to set SLPC max to RP0 (%pe)\n", + ERR_PTR(ret)); + return ret; + } + + /* Revert SLPC min/max to softlimits if necessary */ + ret = slpc_set_softlimits(slpc); + if (unlikely(ret)) { + drm_err(&i915->drm, "Failed to set SLPC softlimits (%pe)\n", + ERR_PTR(ret)); + return ret; + } + return 0; }

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h index 3cefe19b17b2..41d13527666f 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h @@ -15,6 +15,15 @@ struct intel_guc_slpc { struct slpc_shared_data *vaddr; bool supported; bool selected; + + /* platform frequency limits */ + u32 min_freq; + u32 rp0_freq; + u32 rp1_freq; + + /* frequency softlimits */ + u32 min_freq_softlimit; + u32 max_freq_softlimit; };

#endif diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5603377e06ca..f3a445f79a36 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4109,6 +4109,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define BXT_GT_PERF_STATUS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x7070) #define GEN6_RP_STATE_LIMITS _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5994) #define GEN6_RP_STATE_CAP _MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5998) +#define RP0_CAP_MASK REG_GENMASK(7, 0) +#define RP1_CAP_MASK REG_GENMASK(15, 8) +#define RPN_CAP_MASK REG_GENMASK(23, 16) #define BXT_RP_STATE_CAP _MMIO(0x138170) #define GEN9_RP_STATE_LIMITS _MMIO(0x138148)

Update the get/set min/max freq hooks to work for SLPC case as well. Consolidate helpers for requested/min/max frequency get/set to intel_rps where the proper action can be taken depending on whether SLPC is enabled.

v2: Add wrappers for getting rp0/1/n frequencies, update softlimits in set min/max SLPC functions. Also check for boundary conditions before setting them.

v3: Address review comments (Michal W)

v4: Add helper for host part of intel_rps_set_freq helpers (Michal W)

v5: checkpatch()

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Acked-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@linux.intel.com Signed-off-by: Sujaritha Sundaresan sujaritha.sundaresan@intel.com --- drivers/gpu/drm/i915/gt/intel_rps.c | 177 ++++++++++++++++++++++++++++ drivers/gpu/drm/i915/gt/intel_rps.h | 10 ++ drivers/gpu/drm/i915/i915_pmu.c | 2 +- drivers/gpu/drm/i915/i915_reg.h | 2 + drivers/gpu/drm/i915/i915_sysfs.c | 83 +++---------- 5 files changed, 207 insertions(+), 67 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c index a92da4b3bd42..847c6313c1e7 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.c +++ b/drivers/gpu/drm/i915/gt/intel_rps.c @@ -37,6 +37,13 @@ static struct intel_uncore *rps_to_uncore(struct intel_rps *rps) return rps_to_gt(rps)->uncore; }

+static struct intel_guc_slpc *rps_to_slpc(struct intel_rps *rps) +{ + struct intel_gt *gt = rps_to_gt(rps); + + return &gt->uc.guc.slpc; +} + static bool rps_uses_slpc(struct intel_rps *rps) { struct intel_gt *gt = rps_to_gt(rps); @@ -1963,6 +1970,176 @@ u32 intel_rps_read_actual_frequency(struct intel_rps *rps) return freq; }

+u32 intel_rps_read_punit_req(struct intel_rps *rps) +{ + struct intel_uncore *uncore = rps_to_uncore(rps); + + return intel_uncore_read(uncore, GEN6_RPNSWREQ); +} + +static u32 intel_rps_get_req(u32 pureq) +{ + u32 req = pureq >> GEN9_SW_REQ_UNSLICE_RATIO_SHIFT; + + return req; +} + +u32 intel_rps_read_punit_req_frequency(struct intel_rps *rps) +{ + u32 freq = intel_rps_get_req(intel_rps_read_punit_req(rps)); + + return intel_gpu_freq(rps, freq); +} + +u32 intel_rps_get_requested_frequency(struct intel_rps *rps) +{ + if (rps_uses_slpc(rps)) + return intel_rps_read_punit_req_frequency(rps); + else + return intel_gpu_freq(rps, rps->cur_freq); +} + +u32 intel_rps_get_max_frequency(struct intel_rps *rps) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return slpc->max_freq_softlimit; + else + return intel_gpu_freq(rps, rps->max_freq_softlimit); +} + +u32 intel_rps_get_rp0_frequency(struct intel_rps *rps) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return slpc->rp0_freq; + else + return intel_gpu_freq(rps, rps->rp0_freq); +} + +u32 intel_rps_get_rp1_frequency(struct intel_rps *rps) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return slpc->rp1_freq; + else + return intel_gpu_freq(rps, rps->rp1_freq); +} + +u32 intel_rps_get_rpn_frequency(struct intel_rps *rps) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return slpc->min_freq; + else + return intel_gpu_freq(rps, rps->min_freq); +} + +static int set_max_freq(struct intel_rps *rps, u32 val) +{ + struct drm_i915_private *i915 = rps_to_i915(rps); + int ret = 0; + + mutex_lock(&rps->lock); + + val = intel_freq_opcode(rps, val); + if (val < rps->min_freq || + val > rps->max_freq || + val < rps->min_freq_softlimit) { + ret = -EINVAL; + goto unlock; + } + + if (val > rps->rp0_freq) + drm_dbg(&i915->drm, "User requested overclocking to %d\n", + intel_gpu_freq(rps, val)); + + rps->max_freq_softlimit = val; + + val = clamp_t(int, rps->cur_freq, + rps->min_freq_softlimit, + rps->max_freq_softlimit); + + /* + * We still need *_set_rps to process the new max_delay and + * update the interrupt limits and PMINTRMSK even though + * frequency request may be unchanged. + */ + intel_rps_set(rps, val); + +unlock: + mutex_unlock(&rps->lock); + + return ret; +} + +int intel_rps_set_max_frequency(struct intel_rps *rps, u32 val) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return intel_guc_slpc_set_max_freq(slpc, val); + else + return set_max_freq(rps, val); +} + +u32 intel_rps_get_min_frequency(struct intel_rps *rps) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return slpc->min_freq_softlimit; + else + return intel_gpu_freq(rps, rps->min_freq_softlimit); +} + +static int set_min_freq(struct intel_rps *rps, u32 val) +{ + int ret = 0; + + mutex_lock(&rps->lock); + + val = intel_freq_opcode(rps, val); + if (val < rps->min_freq || + val > rps->max_freq || + val > rps->max_freq_softlimit) { + ret = -EINVAL; + goto unlock; + } + + rps->min_freq_softlimit = val; + + val = clamp_t(int, rps->cur_freq, + rps->min_freq_softlimit, + rps->max_freq_softlimit); + + /* + * We still need *_set_rps to process the new min_delay and + * update the interrupt limits and PMINTRMSK even though + * frequency request may be unchanged. + */ + intel_rps_set(rps, val); + +unlock: + mutex_unlock(&rps->lock); + + return ret; +} + +int intel_rps_set_min_frequency(struct intel_rps *rps, u32 val) +{ + struct intel_guc_slpc *slpc = rps_to_slpc(rps); + + if (rps_uses_slpc(rps)) + return intel_guc_slpc_set_min_freq(slpc, val); + else + return set_min_freq(rps, val); +} + /* External interface for intel_ips.ko */

static struct drm_i915_private __rcu *ips_mchdev; diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h index 1d2cfc98b510..4213bcce1667 100644 --- a/drivers/gpu/drm/i915/gt/intel_rps.h +++ b/drivers/gpu/drm/i915/gt/intel_rps.h @@ -31,6 +31,16 @@ int intel_gpu_freq(struct intel_rps *rps, int val); int intel_freq_opcode(struct intel_rps *rps, int val); u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat1); u32 intel_rps_read_actual_frequency(struct intel_rps *rps); +u32 intel_rps_get_requested_frequency(struct intel_rps *rps); +u32 intel_rps_get_min_frequency(struct intel_rps *rps); +int intel_rps_set_min_frequency(struct intel_rps *rps, u32 val); +u32 intel_rps_get_max_frequency(struct intel_rps *rps); +int intel_rps_set_max_frequency(struct intel_rps *rps, u32 val); +u32 intel_rps_get_rp0_frequency(struct intel_rps *rps); +u32 intel_rps_get_rp1_frequency(struct intel_rps *rps); +u32 intel_rps_get_rpn_frequency(struct intel_rps *rps); +u32 intel_rps_read_punit_req(struct intel_rps *rps); +u32 intel_rps_read_punit_req_frequency(struct intel_rps *rps);

void gen5_rps_irq_handler(struct intel_rps *rps); void gen6_rps_irq_handler(struct intel_rps *rps, u32 pm_iir); diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index eca92076f31d..0b488d49694c 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -407,7 +407,7 @@ frequency_sample(struct intel_gt *gt, unsigned int period_ns)

if (pmu->enable & config_mask(I915_PMU_REQUESTED_FREQUENCY)) { add_sample_mult(&pmu->sample[__I915_SAMPLE_FREQ_REQ], - intel_gpu_freq(rps, rps->cur_freq), + intel_rps_get_requested_frequency(rps), period_ns / 1000); }

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f3a445f79a36..2416a5e63f2a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9229,6 +9229,8 @@ enum { #define GEN9_FREQUENCY(x) ((x) << 23) #define GEN6_OFFSET(x) ((x) << 19) #define GEN6_AGGRESSIVE_TURBO (0 << 15) +#define GEN9_SW_REQ_UNSLICE_RATIO_SHIFT 23 + #define GEN6_RC_VIDEO_FREQ _MMIO(0xA00C) #define GEN6_RC_CONTROL _MMIO(0xA090) #define GEN6_RC_CTL_RC6pp_ENABLE (1 << 16) diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index 873bf996ceb5..cdf0e9c6fd73 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -272,7 +272,7 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev, struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); struct intel_rps *rps = &i915->gt.rps;

- return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->cur_freq)); + return sysfs_emit(buf, "%d\n", intel_rps_get_requested_frequency(rps)); }

static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) @@ -326,9 +326,10 @@ static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev, static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); - struct intel_rps *rps = &dev_priv->gt.rps; + struct intel_gt *gt = &dev_priv->gt; + struct intel_rps *rps = &gt->rps;

- return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->max_freq_softlimit)); + return sysfs_emit(buf, "%d\n", intel_rps_get_max_frequency(rps)); }

static ssize_t gt_max_freq_mhz_store(struct device *kdev, @@ -336,7 +337,8 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, const char *buf, size_t count) { struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); - struct intel_rps *rps = &dev_priv->gt.rps; + struct intel_gt *gt = &dev_priv->gt; + struct intel_rps *rps = &gt->rps; ssize_t ret; u32 val;

@@ -344,53 +346,26 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev, if (ret) return ret;

- mutex_lock(&rps->lock); - - val = intel_freq_opcode(rps, val); - if (val < rps->min_freq || - val > rps->max_freq || - val < rps->min_freq_softlimit) { - ret = -EINVAL; - goto unlock; - } - - if (val > rps->rp0_freq) - DRM_DEBUG("User requested overclocking to %d\n", - intel_gpu_freq(rps, val)); - - rps->max_freq_softlimit = val; - - val = clamp_t(int, rps->cur_freq, - rps->min_freq_softlimit, - rps->max_freq_softlimit); - - /* - * We still need *_set_rps to process the new max_delay and - * update the interrupt limits and PMINTRMSK even though - * frequency request may be unchanged. - */ - intel_rps_set(rps, val); - -unlock: - mutex_unlock(&rps->lock); + ret = intel_rps_set_max_frequency(rps, val);

return ret ?: count; }

static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) { - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); - struct intel_rps *rps = &dev_priv->gt.rps; + struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); + struct intel_gt *gt = &i915->gt; + struct intel_rps *rps = &gt->rps;

- return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->min_freq_softlimit)); + return sysfs_emit(buf, "%d\n", intel_rps_get_min_frequency(rps)); }

static ssize_t gt_min_freq_mhz_store(struct device *kdev, struct device_attribute *attr, const char *buf, size_t count) { - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); - struct intel_rps *rps = &dev_priv->gt.rps; + struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); + struct intel_rps *rps = &i915->gt.rps; ssize_t ret; u32 val;

@@ -398,31 +373,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev, if (ret) return ret;

- mutex_lock(&rps->lock); - - val = intel_freq_opcode(rps, val); - if (val < rps->min_freq || - val > rps->max_freq || - val > rps->max_freq_softlimit) { - ret = -EINVAL; - goto unlock; - } - - rps->min_freq_softlimit = val; - - val = clamp_t(int, rps->cur_freq, - rps->min_freq_softlimit, - rps->max_freq_softlimit); - - /* - * We still need *_set_rps to process the new min_delay and - * update the interrupt limits and PMINTRMSK even though - * frequency request may be unchanged. - */ - intel_rps_set(rps, val); - -unlock: - mutex_unlock(&rps->lock); + ret = intel_rps_set_min_frequency(rps, val);

return ret ?: count; } @@ -448,11 +399,11 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr u32 val;

if (attr == &dev_attr_gt_RP0_freq_mhz) - val = intel_gpu_freq(rps, rps->rp0_freq); + val = intel_rps_get_rp0_frequency(rps); else if (attr == &dev_attr_gt_RP1_freq_mhz) - val = intel_gpu_freq(rps, rps->rp1_freq); + val = intel_rps_get_rp1_frequency(rps); else if (attr == &dev_attr_gt_RPn_freq_mhz) - val = intel_gpu_freq(rps, rps->min_freq); + val = intel_rps_get_rpn_frequency(rps); else BUG();

This feature hands over the control of HW RC6 to the GuC. GuC decides when to put HW into RC6 based on it's internal busyness algorithms.

GuCRC needs GuC submission to be enabled, and only supported on Gen12+ for now.

When GuCRC is enabled, do not set HW RC6. Use a H2G message to tell GuC to enable GuCRC. When disabling RC6, tell GuC to revert RC6 control back to KMD. KMD is still responsible for enabling everything related to Coarse Power Gating though.

v2: Address comments (Michal W) v3: Don't set hysterisis values when GuCRC is used (Matt Roper) v4: checkpatch()

Reviewed-by: Michal Wajdeczko michal.wajdeczko@intel.com Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/gt/intel_rc6.c | 47 +++++++---- .../gpu/drm/i915/gt/uc/abi/guc_actions_abi.h | 6 ++ drivers/gpu/drm/i915/gt/uc/intel_guc.c | 1 + drivers/gpu/drm/i915/gt/uc/intel_guc.h | 2 + drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c | 80 +++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h | 31 +++++++ drivers/gpu/drm/i915/gt/uc/intel_uc.h | 2 + 8 files changed, 155 insertions(+), 15 deletions(-) create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index d8eac4468df9..3fc17f20d88e 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -186,6 +186,7 @@ i915-y += gt/uc/intel_uc.o \ gt/uc/intel_guc_fw.o \ gt/uc/intel_guc_log.o \ gt/uc/intel_guc_log_debugfs.o \ + gt/uc/intel_guc_rc.o \ gt/uc/intel_guc_slpc.o \ gt/uc/intel_guc_submission.o \ gt/uc/intel_huc.o \ diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c index 259d7eb4e165..f6b914438a0b 100644 --- a/drivers/gpu/drm/i915/gt/intel_rc6.c +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c @@ -62,20 +62,25 @@ static void gen11_rc6_enable(struct intel_rc6 *rc6) u32 pg_enable; int i;

- /* 2b: Program RC6 thresholds.*/ - set(uncore, GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16 | 85); - set(uncore, GEN10_MEDIA_WAKE_RATE_LIMIT, 150); + /* + * With GuCRC, these parameters are set by GuC + */ + if (!intel_uc_uses_guc_rc(&gt->uc)) { + /* 2b: Program RC6 thresholds.*/ + set(uncore, GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16 | 85); + set(uncore, GEN10_MEDIA_WAKE_RATE_LIMIT, 150);

- set(uncore, GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */ - set(uncore, GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */ - for_each_engine(engine, rc6_to_gt(rc6), id) - set(uncore, RING_MAX_IDLE(engine->mmio_base), 10); + set(uncore, GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */ + set(uncore, GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */ + for_each_engine(engine, rc6_to_gt(rc6), id) + set(uncore, RING_MAX_IDLE(engine->mmio_base), 10);

- set(uncore, GUC_MAX_IDLE_COUNT, 0xA); + set(uncore, GUC_MAX_IDLE_COUNT, 0xA);

- set(uncore, GEN6_RC_SLEEP, 0); + set(uncore, GEN6_RC_SLEEP, 0);

- set(uncore, GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */ + set(uncore, GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */ + }

/* * 2c: Program Coarse Power Gating Policies. @@ -98,11 +103,19 @@ static void gen11_rc6_enable(struct intel_rc6 *rc6) set(uncore, GEN9_MEDIA_PG_IDLE_HYSTERESIS, 60); set(uncore, GEN9_RENDER_PG_IDLE_HYSTERESIS, 60);

- /* 3a: Enable RC6 */ - rc6->ctl_enable = - GEN6_RC_CTL_HW_ENABLE | - GEN6_RC_CTL_RC6_ENABLE | - GEN6_RC_CTL_EI_MODE(1); + /* 3a: Enable RC6 + * + * With GuCRC, we do not enable bit 31 of RC_CTL, + * thus allowing GuC to control RC6 entry/exit fully instead. + * We will not set the HW ENABLE and EI bits + */ + if (!intel_guc_rc_enable(&gt->uc.guc)) + rc6->ctl_enable = GEN6_RC_CTL_RC6_ENABLE; + else + rc6->ctl_enable = + GEN6_RC_CTL_HW_ENABLE | + GEN6_RC_CTL_RC6_ENABLE | + GEN6_RC_CTL_EI_MODE(1);

pg_enable = GEN9_RENDER_PG_ENABLE | @@ -513,6 +526,10 @@ static void __intel_rc6_disable(struct intel_rc6 *rc6) { struct drm_i915_private *i915 = rc6_to_i915(rc6); struct intel_uncore *uncore = rc6_to_uncore(rc6); + struct intel_gt *gt = rc6_to_gt(rc6); + + /* Take control of RC6 back from GuC */ + intel_guc_rc_disable(&gt->uc.guc);

intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL); if (GRAPHICS_VER(i915) >= 9) 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 ca538e5de940..8ff582222aff 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 @@ -135,6 +135,7 @@ 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_SETUP_PC_GUCRC = 0x3004, INTEL_GUC_ACTION_AUTHENTICATE_HUC = 0x4000, INTEL_GUC_ACTION_REGISTER_CONTEXT = 0x4502, INTEL_GUC_ACTION_DEREGISTER_CONTEXT = 0x4503, @@ -145,6 +146,11 @@ enum intel_guc_action { INTEL_GUC_ACTION_LIMIT };

+enum intel_guc_rc_options { + INTEL_GUCRC_HOST_CONTROL, + INTEL_GUCRC_FIRMWARE_CONTROL, +}; + enum intel_guc_preempt_options { INTEL_GUC_PREEMPT_OPTION_DROP_WORK_Q = 0x4, INTEL_GUC_PREEMPT_OPTION_DROP_SUBMIT_Q = 0x8, diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c index 13d162353b1a..fbfcae727d7f 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c @@ -159,6 +159,7 @@ void intel_guc_init_early(struct intel_guc *guc) intel_guc_log_init_early(&guc->log); intel_guc_submission_init_early(guc); intel_guc_slpc_init_early(&guc->slpc); + intel_guc_rc_init_early(guc);

mutex_init(&guc->send_mutex); spin_lock_init(&guc->irq_lock); diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h index 7da11a0b6059..2e27fe59786b 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h @@ -59,6 +59,8 @@ struct intel_guc {

bool submission_supported; bool submission_selected; + bool rc_supported; + bool rc_selected;

struct i915_vma *ads_vma; struct __guc_ads_blob *ads_blob; diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c new file mode 100644 index 000000000000..fc805d466d99 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2021 Intel Corporation + */ + +#include "intel_guc_rc.h" +#include "gt/intel_gt.h" +#include "i915_drv.h" + +static bool __guc_rc_supported(struct intel_guc *guc) +{ + /* GuC RC is unavailable for pre-Gen12 */ + return guc->submission_supported && + GRAPHICS_VER(guc_to_gt(guc)->i915) >= 12; +} + +static bool __guc_rc_selected(struct intel_guc *guc) +{ + if (!intel_guc_rc_is_supported(guc)) + return false; + + return guc->submission_selected; +} + +void intel_guc_rc_init_early(struct intel_guc *guc) +{ + guc->rc_supported = __guc_rc_supported(guc); + guc->rc_selected = __guc_rc_selected(guc); +} + +static int guc_action_control_gucrc(struct intel_guc *guc, bool enable) +{ + u32 rc_mode = enable ? INTEL_GUCRC_FIRMWARE_CONTROL : + INTEL_GUCRC_HOST_CONTROL; + u32 action[] = { + INTEL_GUC_ACTION_SETUP_PC_GUCRC, + rc_mode + }; + int ret; + + ret = intel_guc_send(guc, action, ARRAY_SIZE(action)); + ret = ret > 0 ? -EPROTO : ret; + + return ret; +} + +static int __guc_rc_control(struct intel_guc *guc, bool enable) +{ + struct intel_gt *gt = guc_to_gt(guc); + struct drm_device *drm = &guc_to_gt(guc)->i915->drm; + int ret; + + if (!intel_uc_uses_guc_rc(&gt->uc)) + return -EOPNOTSUPP; + + if (!intel_guc_is_ready(guc)) + return -EINVAL; + + ret = guc_action_control_gucrc(guc, enable); + if (ret) { + drm_err(drm, "Failed to %s GuC RC (%pe)\n", + enabledisable(enable), ERR_PTR(ret)); + return ret; + } + + drm_info(&gt->i915->drm, "GuC RC: %s\n", + enableddisabled(enable)); + + return 0; +} + +int intel_guc_rc_enable(struct intel_guc *guc) +{ + return __guc_rc_control(guc, true); +} + +int intel_guc_rc_disable(struct intel_guc *guc) +{ + return __guc_rc_control(guc, false); +} diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h new file mode 100644 index 000000000000..57e86c337838 --- /dev/null +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2021 Intel Corporation + */ + +#ifndef _INTEL_GUC_RC_H_ +#define _INTEL_GUC_RC_H_ + +#include "intel_guc_submission.h" + +void intel_guc_rc_init_early(struct intel_guc *guc); + +static inline bool intel_guc_rc_is_supported(struct intel_guc *guc) +{ + return guc->rc_supported; +} + +static inline bool intel_guc_rc_is_wanted(struct intel_guc *guc) +{ + return guc->submission_selected && intel_guc_rc_is_supported(guc); +} + +static inline bool intel_guc_rc_is_used(struct intel_guc *guc) +{ + return intel_guc_submission_is_used(guc) && intel_guc_rc_is_wanted(guc); +} + +int intel_guc_rc_enable(struct intel_guc *guc); +int intel_guc_rc_disable(struct intel_guc *guc); + +#endif diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.h b/drivers/gpu/drm/i915/gt/uc/intel_uc.h index 925a58ca6b94..866b462821c0 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.h @@ -7,6 +7,7 @@ #define _INTEL_UC_H_

#include "intel_guc.h" +#include "intel_guc_rc.h" #include "intel_guc_submission.h" #include "intel_guc_slpc.h" #include "intel_huc.h" @@ -85,6 +86,7 @@ uc_state_checkers(guc, guc); uc_state_checkers(huc, huc); uc_state_checkers(guc, guc_submission); uc_state_checkers(guc, guc_slpc); +uc_state_checkers(guc, guc_rc);

#undef uc_state_checkers #undef __uc_state_checker