drm: i915: Use nsec based interfaces

Use ktime_get_raw_ns() and get rid of the back and forth timespec
conversions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 374f964..1f77008 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -931,7 +931,7 @@ struct intel_ilk_power_mgmt {
        unsigned long last_time1;
        unsigned long chipset_power;
        u64 last_count2;
-       struct timespec last_time2;
+       u64 last_time2;
        unsigned long gfx_power;
        u8 corr;
 

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f361263..74531ca 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1149,16 +1149,16 @@ static bool can_wait_boost(struct drm_i915_file_private *file_priv)
 static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
                        unsigned reset_counter,
                        bool interruptible,
-                       struct timespec *timeout,
+                       s64 *timeout,
                        struct drm_i915_file_private *file_priv)
 {
        struct drm_device *dev = ring->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        const bool irq_test_in_progress =
                ACCESS_ONCE(dev_priv->gpu_error.test_irq_rings) & intel_ring_flag(ring);
-       struct timespec before, now;
        DEFINE_WAIT(wait);
        unsigned long timeout_expire;
+       s64 before, now;
        int ret;
 
        WARN(dev_priv->pm.irqs_disabled, "IRQs disabled\n");
@@ -1166,7 +1166,7 @@ static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
        if (i915_seqno_passed(ring->get_seqno(ring, true), seqno))
                return 0;
 
-       timeout_expire = timeout ? jiffies + timespec_to_jiffies_timeout(timeout) : 0;
+       timeout_expire = timeout ? jiffies + nsecs_to_jiffies((u64)*timeout) : 0;
 
        if (INTEL_INFO(dev)->gen >= 6 && can_wait_boost(file_priv)) {
                gen6_rps_boost(dev_priv);
@@ -1181,7 +1181,7 @@ static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
 
        /* Record current time in case interrupted by signal, or wedged */
        trace_i915_gem_request_wait_begin(ring, seqno);
-       getrawmonotonic(&before);
+       before = ktime_get_raw_ns();
        for (;;) {
                struct timer_list timer;
 
@@ -1230,7 +1230,7 @@ static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
                        destroy_timer_on_stack(&timer);
                }
        }
-       getrawmonotonic(&now);
+       now = ktime_get_raw_ns();
        trace_i915_gem_request_wait_end(ring, seqno);
 
        if (!irq_test_in_progress)
@@ -1239,10 +1239,9 @@ static int __wait_seqno(struct intel_engine_cs *ring, u32 seqno,
        finish_wait(&ring->irq_queue, &wait);
 
        if (timeout) {
-               struct timespec sleep_time = timespec_sub(now, before);
-               *timeout = timespec_sub(*timeout, sleep_time);
-               if (!timespec_valid(timeout)) /* i.e. negative time remains */
-                       set_normalized_timespec(timeout, 0, 0);
+               s64 tres = *timeout - (now - before);
+
+               *timeout = tres < 0 ? 0 : tres;
        }
 
        return ret;
@@ -2753,16 +2752,10 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
        struct drm_i915_gem_wait *args = data;
        struct drm_i915_gem_object *obj;
        struct intel_engine_cs *ring = NULL;
-       struct timespec timeout_stack, *timeout = NULL;
        unsigned reset_counter;
        u32 seqno = 0;
        int ret = 0;
 
-       if (args->timeout_ns >= 0) {
-               timeout_stack = ns_to_timespec(args->timeout_ns);
-               timeout = &timeout_stack;
-       }
-
        ret = i915_mutex_lock_interruptible(dev);
        if (ret)
                return ret;
@@ -2787,9 +2780,9 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
                 goto out;
 
        /* Do this after OLR check to make sure we make forward progress polling
-        * on this IOCTL with a 0 timeout (like busy ioctl)
+        * on this IOCTL with a timeout <=0 (like busy ioctl)
         */
-       if (!args->timeout_ns) {
+       if (args->timeout_ns <= 0) {
                ret = -ETIME;
                goto out;
        }
@@ -2798,10 +2791,8 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
        reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
        mutex_unlock(&dev->struct_mutex);
 
-       ret = __wait_seqno(ring, seqno, reset_counter, true, timeout, file->driver_priv);
-       if (timeout)
-               args->timeout_ns = timespec_to_ns(timeout);
-       return ret;
+       return __wait_seqno(ring, seqno, reset_counter, true, &args->timeout_ns,
+                           file->driver_priv);
 
 out:
        drm_gem_object_unreference(&obj->base);

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ee72807..f1233f5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2993,7 +2993,7 @@ static void ironlake_enable_drps(struct drm_device *dev)
                I915_READ(0x112e0);
        dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
        dev_priv->ips.last_count2 = I915_READ(0x112f4);
-       getrawmonotonic(&dev_priv->ips.last_time2);
+       dev_priv->ips.last_time2 = ktime_get_raw_ns();
 
        spin_unlock_irq(&mchdev_lock);
 }
@@ -4314,18 +4314,16 @@ static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
 
 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
 {
-       struct timespec now, diff1;
-       u64 diff;
-       unsigned long diffms;
+       u64 now, diff, diffms;
        u32 count;
 
        assert_spin_locked(&mchdev_lock);
 
-       getrawmonotonic(&now);
-       diff1 = timespec_sub(now, dev_priv->ips.last_time2);
+       now = ktime_get_raw_ns();
+       diffms = now - dev_priv->ips.last_time2;
+       do_div(diffms, NSEC_PER_MSEC);
 
        /* Don't divide by 0 */
-       diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
        if (!diffms)
                return;