On 7/21/2021 10:42 AM, Michal Wajdeczko wrote:
On 21.07.2021 18:11, Vinay Belgaumkar wrote:
Add param set h2g helpers to set the min and max frequencies for use by SLPC.
v2: Address review comments (Michal W)
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 | 84 +++++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 2 + 2 files changed, 86 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 48db2a8f67d1..b40c39ba4049 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c @@ -109,6 +109,18 @@ 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[] = {
INTEL_GUC_ACTION_SLPC_REQUEST,SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2),id,value,- };
- return intel_guc_send(guc, request, ARRAY_SIZE(request));
beware of possible non-zero data0 returned by guc_send()
Ok, added -EPROTO check.
+}
- static bool slpc_is_running(struct intel_guc_slpc *slpc) { return (slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING);
@@ -143,6 +155,15 @@ 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);
- GEM_BUG_ON(id >= SLPC_MAX_PARAM);
- return guc_action_slpc_set_param(guc, id, value);
+}
- static const char *slpc_state_string(struct intel_guc_slpc *slpc) { const char *str = NULL;
@@ -238,6 +259,69 @@ u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc) GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER); }
+/**
- 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) +{
- int ret;
- struct drm_i915_private *i915 = slpc_to_i915(slpc);
- intel_wakeref_t wakeref;
nit: move "ret" as last
ok.
- with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
ret = slpc_set_param(slpc,SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ,val);if (ret) {drm_err(&i915->drm,"Set max frequency unslice returned (%pe)\n", ERR_PTR(ret));/* Return standardized err code for sysfs */ret = -EIO;maybe caller (hook in sysfs) can sanitize this error ?
Caller will then need to check the error type - something like-
if (err) { if (err != -EINVAL) return -EIO; }
Seems cleaner to return specific error type from here instead. Anything other than -EINVAL or -EIO causes garbage in sysfs output.
Thanks, Vinay.
Michal
}- }
- 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) +{
- int ret;
- struct intel_guc *guc = slpc_to_guc(slpc);
- struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
- intel_wakeref_t wakeref;
- with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
ret = slpc_set_param(slpc,SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ,val);if (ret) {drm_err(&i915->drm,"Set min frequency for unslice returned (%pe)\n", ERR_PTR(ret));/* Return standardized err code for sysfs */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 f02249ff5f1b..3a1a7eaafc12 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h @@ -30,5 +30,7 @@ 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