drm/i915/gt: Track use of RPS interrupts in flags

Use the new intel_rps.flags field to store whether or not interrupts are
being used with RPS.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Andi Shyti <andi@etezian.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200429205446.3259-3-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index a27e989..5215100 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -742,7 +742,7 @@ void intel_rps_unpark(struct intel_rps *rps)
 
        mutex_unlock(&rps->lock);
 
-       if (INTEL_GEN(rps_to_i915(rps)) >= 6)
+       if (intel_rps_has_interrupts(rps))
                rps_enable_interrupts(rps);
 
        if (IS_GEN(rps_to_i915(rps), 5))
@@ -751,12 +751,10 @@ void intel_rps_unpark(struct intel_rps *rps)
 
 void intel_rps_park(struct intel_rps *rps)
 {
-       struct drm_i915_private *i915 = rps_to_i915(rps);
-
        if (!intel_rps_clear_active(rps))
                return;
 
-       if (INTEL_GEN(i915) >= 6)
+       if (intel_rps_has_interrupts(rps))
                rps_disable_interrupts(rps);
 
        if (rps->last_freq <= rps->idle_freq)
@@ -838,7 +836,7 @@ int intel_rps_set(struct intel_rps *rps, u8 val)
                 * Make sure we continue to get interrupts
                 * until we hit the minimum or maximum frequencies.
                 */
-               if (INTEL_GEN(rps_to_i915(rps)) >= 6) {
+               if (intel_rps_has_interrupts(rps)) {
                        struct intel_uncore *uncore = rps_to_uncore(rps);
 
                        set(uncore,
@@ -1257,6 +1255,11 @@ void intel_rps_enable(struct intel_rps *rps)
        GEM_BUG_ON(rps->efficient_freq < rps->min_freq);
        GEM_BUG_ON(rps->efficient_freq > rps->max_freq);
 
+       if (INTEL_GEN(i915) >= 6)
+               intel_rps_set_interrupts(rps);
+       else
+               /* Ironlake currently uses intel_ips.ko */ {}
+
        intel_rps_set_enabled(rps);
 }
 
@@ -1270,6 +1273,7 @@ void intel_rps_disable(struct intel_rps *rps)
        struct drm_i915_private *i915 = rps_to_i915(rps);
 
        intel_rps_clear_enabled(rps);
+       intel_rps_clear_interrupts(rps);
 
        if (INTEL_GEN(i915) >= 6)
                gen6_rps_disable(rps);
@@ -1741,6 +1745,9 @@ void intel_rps_init(struct intel_rps *rps)
 
        if (INTEL_GEN(i915) >= 8 && INTEL_GEN(i915) < 11)
                rps->pm_intrmsk_mbz |= GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
+
+       if (INTEL_GEN(i915) >= 6)
+               rps_disable_interrupts(rps);
 }
 
 u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat)

diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h
index a01decf..0ce6a0e 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_rps.h
+++ b/drivers/gpu/drm/i915/gt/intel_rps.h
@@ -66,4 +66,19 @@ static inline bool intel_rps_clear_active(struct intel_rps *rps)
        return test_and_clear_bit(INTEL_RPS_ACTIVE, &rps->flags);
 }
 
+static inline bool intel_rps_has_interrupts(const struct intel_rps *rps)
+{
+       return test_bit(INTEL_RPS_INTERRUPTS, &rps->flags);
+}
+
+static inline void intel_rps_set_interrupts(struct intel_rps *rps)
+{
+       set_bit(INTEL_RPS_INTERRUPTS, &rps->flags);
+}
+
+static inline void intel_rps_clear_interrupts(struct intel_rps *rps)
+{
+       clear_bit(INTEL_RPS_INTERRUPTS, &rps->flags);
+}
+
 #endif /* INTEL_RPS_H */

diff --git a/drivers/gpu/drm/i915/gt/intel_rps_types.h b/drivers/gpu/drm/i915/gt/intel_rps_types.h
index 1ec44f9..624e931 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_rps_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_rps_types.h
@@ -34,6 +34,7 @@ struct intel_rps_ei {
 enum {
        INTEL_RPS_ENABLED = 0,
        INTEL_RPS_ACTIVE,
+       INTEL_RPS_INTERRUPTS,
 };
 
 struct intel_rps {

diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c
index e4cc1c8..b89a7d7 100644 (file)
--- a/drivers/gpu/drm/i915/gt/selftest_rps.c
+++ b/drivers/gpu/drm/i915/gt/selftest_rps.c
@@ -1017,7 +1017,7 @@ int live_rps_interrupt(void *arg)
         * First, let's check whether or not we are receiving interrupts.
         */
 
-       if (!intel_rps_is_enabled(rps))
+       if (!intel_rps_has_interrupts(rps))
                return 0;
 
        intel_gt_pm_get(gt);