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drm/i915: Convert 'trace_irq' to use requests rather than seqnos 

Updated the trace_irq code to use requests instead of seqnos. This includes
reference counting the request object to ensure it sticks around when required.
Note that getting access to the reference counting functions means moving the
inline i915_trace_irq_get() function from intel_ringbuffer.h to i915_drv.h.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
[danvet: Resolve conflict due to shuffled merge order.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
John Harrison 2014-11-24 18:49:39 +00:00 committed by Daniel Vetter
parent 3a8a946efb
commit 581c26e8a2
4 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/i915_drv.h
View File

@ -3132,4 +3132,11 @@ wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms)
}
}
static inline void i915_trace_irq_get(struct intel_engine_cs *ring,
struct drm_i915_gem_request *req)
{
if (ring->trace_irq_req == NULL && ring->irq_get(ring))
i915_gem_request_assign(&ring->trace_irq_req, req);
}
#endif

7
drivers/gpu/drm/i915/i915_gem.c
View File

@ -2786,11 +2786,10 @@ i915_gem_retire_requests_ring(struct intel_engine_cs *ring)
i915_gem_free_request(request);
}
if (unlikely(ring->trace_irq_seqno &&
i915_seqno_passed(ring->get_seqno(ring, true),
ring->trace_irq_seqno))) {
if (unlikely(ring->trace_irq_req &&
i915_gem_request_completed(ring->trace_irq_req, true))) {
ring->irq_put(ring);
ring->trace_irq_seqno = 0;
i915_gem_request_assign(&ring->trace_irq_req, NULL);
}
WARN_ON(i915_verify_lists(ring->dev));

2
drivers/gpu/drm/i915/i915_trace.h
View File

@ -369,7 +369,7 @@ TRACE_EVENT(i915_gem_ring_dispatch,
__entry->ring = ring->id;
__entry->seqno = i915_gem_request_get_seqno(req);
__entry->flags = flags;
i915_trace_irq_get(ring, __entry->seqno);
i915_trace_irq_get(ring, req);
),
TP_printk("dev=%u, ring=%u, seqno=%u, flags=%x",

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

@ -142,7 +142,7 @@ struct intel_engine_cs {
unsigned irq_refcount; /* protected by dev_priv->irq_lock */
u32 irq_enable_mask; /* bitmask to enable ring interrupt */
u32 trace_irq_seqno;
struct drm_i915_gem_request *trace_irq_req;
bool __must_check (*irq_get)(struct intel_engine_cs *ring);
void (*irq_put)(struct intel_engine_cs *ring);
@ -442,10 +442,4 @@ intel_ring_get_request(struct intel_engine_cs *ring)
return ring->outstanding_lazy_request;
}
static inline void i915_trace_irq_get(struct intel_engine_cs *ring, u32 seqno)
{
if (ring->trace_irq_seqno == 0 && ring->irq_get(ring))
ring->trace_irq_seqno = seqno;
}
#endif /* _INTEL_RINGBUFFER_H_ */