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drm/i915: Convert the register access tracepoint to be conditional

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The TRACE_EVENT_CONDITION is supposed to generate more efficient code
than if (cond) trace(), which is what we are currently using inside the
register access functions.

v2: Rebase onto uncore

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2013-07-19 20:36:56 +01:00 committed by Daniel Vetter
parent a7f31ee0b0
commit ed71f1b48e
3 changed files with 8 additions and 6 deletions
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2
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1004,7 +1004,7 @@ static int gen6_drpc_info(struct seq_file *m)
}
gt_core_status = readl(dev_priv->regs + GEN6_GT_CORE_STATUS);
trace_i915_reg_rw(false, GEN6_GT_CORE_STATUS, gt_core_status, 4);
trace_i915_reg_rw(false, GEN6_GT_CORE_STATUS, gt_core_status, 4, true);
rpmodectl1 = I915_READ(GEN6_RP_CONTROL);
rcctl1 = I915_READ(GEN6_RC_CONTROL);

8
drivers/gpu/drm/i915/i915_trace.h
View File

@ -406,10 +406,12 @@ TRACE_EVENT(i915_flip_complete,
TP_printk("plane=%d, obj=%p", __entry->plane, __entry->obj)
);
TRACE_EVENT(i915_reg_rw,
TP_PROTO(bool write, u32 reg, u64 val, int len),
TRACE_EVENT_CONDITION(i915_reg_rw,
TP_PROTO(bool write, u32 reg, u64 val, int len, bool trace),
TP_ARGS(write, reg, val, len),
TP_ARGS(write, reg, val, len, trace),
TP_CONDITION(trace),
TP_STRUCT__entry(
__field(u64, val)

4
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -359,7 +359,7 @@ u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg, bool trace) { \
val = __raw_i915_read##x(dev_priv, reg); \
} \
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
if (trace) trace_i915_reg_rw(false, reg, val, sizeof(val)); \
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
return val; \
}
@ -373,7 +373,7 @@ __i915_read(64)
void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val, bool trace) { \
unsigned long irqflags; \
u32 __fifo_ret = 0; \
if (trace) trace_i915_reg_rw(true, reg, val, sizeof(val)); \
trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
__fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \