drm/etnaviv: add performance monitor request processing

Changes v4 -> v5
- make use of doms_meta array

Signed-off-by: Christian Gmeiner <[e-mail]>
Signed-off-by: Lucas Stach <[e-mail]>

drivers/gpu/drm/etnaviv/etnaviv_perfmon.c

···
  */
 
 #include "etnaviv_gpu.h"
+#include "etnaviv_perfmon.h"
 
 struct etnaviv_pm_domain;
 
···
 		return -EINVAL;
 
 	return 0;
+}
+
+void etnaviv_perfmon_process(struct etnaviv_gpu *gpu,
+	const struct etnaviv_perfmon_request *pmr)
+{
+	const struct etnaviv_pm_domain_meta *meta = &doms_meta[gpu->exec_state];
+	const struct etnaviv_pm_domain *dom;
+	const struct etnaviv_pm_signal *sig;
+	u32 *bo = pmr->bo_vma;
+	u32 val;
+
+	dom = meta->domains + pmr->domain;
+	sig = &dom->signal[pmr->signal];
+	val = sig->sample(gpu, dom, sig);
+
+	*(bo + pmr->offset) = val;
 }

drivers/gpu/drm/etnaviv/etnaviv_perfmon.h

···
 int etnaviv_pm_req_validate(const struct drm_etnaviv_gem_submit_pmr *r,
 	u32 exec_state);
 
+void etnaviv_perfmon_process(struct etnaviv_gpu *gpu,
+	const struct etnaviv_perfmon_request *pmr);
+
 #endif /* __ETNAVIV_PERFMON_H__ */