diff options
author | Alex Dai <yu.dai@intel.com> | 2015-12-18 12:00:10 -0800 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-01-05 11:33:40 +0100 |
commit | 463704d07f4cb0767714a67eaaf1ee47eef36fd8 (patch) | |
tree | c2ab427c4aeb52676ef3ca8f32e3906c1dcc6042 /drivers/gpu | |
parent | 68371a954ca4581a6468835f63d6f82783471591 (diff) |
drm/i915/guc: Add GuC ADS - scheduler policies
GuC supports different scheduling policies for its four internal
queues. Currently these have been set to the same default values
as KMD_NORMAL queue.
Particularly POLICY_MAX_NUM_WI is set to 15 to match GuC internal
maximum submit queue numbers to avoid an out-of-space problem.
This value indicates max number of work items allowed to be queued
for one DPC process. A smaller value will let GuC schedule more
frequently while a larger number may increase chances to optimize
cmds (such as collapse cmds from same lrc) with risks that keeps
CS idle.
v1: tidy up code
Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450468812-4882-4-git-send-email-yu.dai@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/i915/i915_guc_submission.c | 32 | ||||
-rw-r--r-- | drivers/gpu/drm/i915/intel_guc_fwif.h | 45 |
2 files changed, 76 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index 7e6c5272e734..1eb8db8d1feb 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -839,17 +839,40 @@ static void guc_create_log(struct intel_guc *guc) guc->log_flags = (offset << GUC_LOG_BUF_ADDR_SHIFT) | flags; } +static void init_guc_policies(struct guc_policies *policies) +{ + struct guc_policy *policy; + u32 p, i; + + policies->dpc_promote_time = 500000; + policies->max_num_work_items = POLICY_MAX_NUM_WI; + + for (p = 0; p < GUC_CTX_PRIORITY_NUM; p++) { + for (i = 0; i < I915_NUM_RINGS; i++) { + policy = &policies->policy[p][i]; + + policy->execution_quantum = 1000000; + policy->preemption_time = 500000; + policy->fault_time = 250000; + policy->policy_flags = 0; + } + } + + policies->is_valid = 1; +} + static void guc_create_ads(struct intel_guc *guc) { struct drm_i915_private *dev_priv = guc_to_i915(guc); struct drm_i915_gem_object *obj; struct guc_ads *ads; + struct guc_policies *policies; struct intel_engine_cs *ring; struct page *page; u32 size, i; /* The ads obj includes the struct itself and buffers passed to GuC */ - size = sizeof(struct guc_ads); + size = sizeof(struct guc_ads) + sizeof(struct guc_policies); obj = guc->ads_obj; if (!obj) { @@ -876,6 +899,13 @@ static void guc_create_ads(struct intel_guc *guc) for_each_ring(ring, dev_priv, i) ads->eng_state_size[i] = intel_lr_context_size(ring); + /* GuC scheduling policies */ + policies = (void *)ads + sizeof(struct guc_ads); + init_guc_policies(policies); + + ads->scheduler_policies = i915_gem_obj_ggtt_offset(obj) + + sizeof(struct guc_ads); + kunmap(page); } diff --git a/drivers/gpu/drm/i915/intel_guc_fwif.h b/drivers/gpu/drm/i915/intel_guc_fwif.h index bc9829eaabb3..1ce5f5ba3147 100644 --- a/drivers/gpu/drm/i915/intel_guc_fwif.h +++ b/drivers/gpu/drm/i915/intel_guc_fwif.h @@ -39,6 +39,7 @@ #define GUC_CTX_PRIORITY_HIGH 1 #define GUC_CTX_PRIORITY_KMD_NORMAL 2 #define GUC_CTX_PRIORITY_NORMAL 3 +#define GUC_CTX_PRIORITY_NUM 4 #define GUC_MAX_GPU_CONTEXTS 1024 #define GUC_INVALID_CTX_ID GUC_MAX_GPU_CONTEXTS @@ -316,6 +317,50 @@ struct guc_context_desc { #define GUC_POWER_D2 3 #define GUC_POWER_D3 4 +/* Scheduling policy settings */ + +/* Reset engine upon preempt failure */ +#define POLICY_RESET_ENGINE (1<<0) +/* Preempt to idle on quantum expiry */ +#define POLICY_PREEMPT_TO_IDLE (1<<1) + +#define POLICY_MAX_NUM_WI 15 + +struct guc_policy { + /* Time for one workload to execute. (in micro seconds) */ + u32 execution_quantum; + u32 reserved1; + + /* Time to wait for a preemption request to completed before issuing a + * reset. (in micro seconds). */ + u32 preemption_time; + + /* How much time to allow to run after the first fault is observed. + * Then preempt afterwards. (in micro seconds) */ + u32 fault_time; + + u32 policy_flags; + u32 reserved[2]; +} __packed; + +struct guc_policies { + struct guc_policy policy[GUC_CTX_PRIORITY_NUM][I915_NUM_RINGS]; + + /* In micro seconds. How much time to allow before DPC processing is + * called back via interrupt (to prevent DPC queue drain starving). + * Typically 1000s of micro seconds (example only, not granularity). */ + u32 dpc_promote_time; + + /* Must be set to take these new values. */ + u32 is_valid; + + /* Max number of WIs to process per call. A large value may keep CS + * idle. */ + u32 max_num_work_items; + + u32 reserved[19]; +} __packed; + /* GuC Additional Data Struct */ struct guc_ads { |