drm/i915/guc/slpc: Update boost sysfs hooks for SLPC

Add a helper to sort through the SLPC/RPS paths of get/set methods.
Boost frequency will be modified as long as it is within the constraints
of RP0 and if it is different from the existing one. We will set min
freq to boost only if there is at least one active waiter.

v2: Add num_boosts to guc_slpc_info and changes for worker function
v3: Review comments (Ashutosh)

Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211102012608.8609-4-vinay.belgaumkar@intel.com

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 6f310c9d9765..07ff7ba7b2b7 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -936,6 +936,53 @@ void intel_rps_park(struct intel_rps *rps)
 	GT_TRACE(rps_to_gt(rps), "park:%x\n", rps->cur_freq);
 }
 
+u32 intel_rps_get_boost_frequency(struct intel_rps *rps)
+{
+	struct intel_guc_slpc *slpc;
+
+	if (rps_uses_slpc(rps)) {
+		slpc = rps_to_slpc(rps);
+
+		return slpc->boost_freq;
+	} else {
+		return intel_gpu_freq(rps, rps->boost_freq);
+	}
+}
+
+static int rps_set_boost_freq(struct intel_rps *rps, u32 val)
+{
+	bool boost = false;
+
+	/* Validate against (static) hardware limits */
+	val = intel_freq_opcode(rps, val);
+	if (val < rps->min_freq || val > rps->max_freq)
+		return -EINVAL;
+
+	mutex_lock(&rps->lock);
+	if (val != rps->boost_freq) {
+		rps->boost_freq = val;
+		boost = atomic_read(&rps->num_waiters);
+	}
+	mutex_unlock(&rps->lock);
+	if (boost)
+		schedule_work(&rps->work);
+
+	return 0;
+}
+
+int intel_rps_set_boost_frequency(struct intel_rps *rps, u32 freq)
+{
+	struct intel_guc_slpc *slpc;
+
+	if (rps_uses_slpc(rps)) {
+		slpc = rps_to_slpc(rps);
+
+		return intel_guc_slpc_set_boost_freq(slpc, freq);
+	} else {
+		return rps_set_boost_freq(rps, freq);
+	}
+}
+
 void intel_rps_dec_waiters(struct intel_rps *rps)
 {
 	struct intel_guc_slpc *slpc;