From: Christian Gmeiner christian.gmeiner@gmail.com
commit ed1dd899baa32d47d9a93d98336472da50564346 upstream.
Report the correct perfmon domains and signals depending on the supported feature flags.
Reported-by: Dan Carpenter dan.carpenter@oracle.com Fixes: 9e2c2e273012 ("drm/etnaviv: add infrastructure to query perf counter") Cc: stable@vger.kernel.org Signed-off-by: Christian Gmeiner christian.gmeiner@gmail.com Signed-off-by: Lucas Stach l.stach@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/etnaviv/etnaviv_perfmon.c | 59 ++++++++++++++++++++++++++---- 1 file changed, 52 insertions(+), 7 deletions(-)
--- a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c @@ -32,6 +32,7 @@ struct etnaviv_pm_domain { };
struct etnaviv_pm_domain_meta { + unsigned int feature; const struct etnaviv_pm_domain *domains; u32 nr_domains; }; @@ -410,36 +411,78 @@ static const struct etnaviv_pm_domain do
static const struct etnaviv_pm_domain_meta doms_meta[] = { { + .feature = chipFeatures_PIPE_3D, .nr_domains = ARRAY_SIZE(doms_3d), .domains = &doms_3d[0] }, { + .feature = chipFeatures_PIPE_2D, .nr_domains = ARRAY_SIZE(doms_2d), .domains = &doms_2d[0] }, { + .feature = chipFeatures_PIPE_VG, .nr_domains = ARRAY_SIZE(doms_vg), .domains = &doms_vg[0] } };
+static unsigned int num_pm_domains(const struct etnaviv_gpu *gpu) +{ + unsigned int num = 0, i; + + for (i = 0; i < ARRAY_SIZE(doms_meta); i++) { + const struct etnaviv_pm_domain_meta *meta = &doms_meta[i]; + + if (gpu->identity.features & meta->feature) + num += meta->nr_domains; + } + + return num; +} + +static const struct etnaviv_pm_domain *pm_domain(const struct etnaviv_gpu *gpu, + unsigned int index) +{ + const struct etnaviv_pm_domain *domain = NULL; + unsigned int offset = 0, i; + + for (i = 0; i < ARRAY_SIZE(doms_meta); i++) { + const struct etnaviv_pm_domain_meta *meta = &doms_meta[i]; + + if (!(gpu->identity.features & meta->feature)) + continue; + + if (meta->nr_domains < (index - offset)) { + offset += meta->nr_domains; + continue; + } + + domain = meta->domains + (index - offset); + } + + return domain; +} + int etnaviv_pm_query_dom(struct etnaviv_gpu *gpu, struct drm_etnaviv_pm_domain *domain) { - const struct etnaviv_pm_domain_meta *meta = &doms_meta[domain->pipe]; + const unsigned int nr_domains = num_pm_domains(gpu); const struct etnaviv_pm_domain *dom;
- if (domain->iter >= meta->nr_domains) + if (domain->iter >= nr_domains) return -EINVAL;
- dom = meta->domains + domain->iter; + dom = pm_domain(gpu, domain->iter); + if (!dom) + return -EINVAL;
domain->id = domain->iter; domain->nr_signals = dom->nr_signals; strncpy(domain->name, dom->name, sizeof(domain->name));
domain->iter++; - if (domain->iter == meta->nr_domains) + if (domain->iter == nr_domains) domain->iter = 0xff;
return 0; @@ -448,14 +491,16 @@ int etnaviv_pm_query_dom(struct etnaviv_ int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu, struct drm_etnaviv_pm_signal *signal) { - const struct etnaviv_pm_domain_meta *meta = &doms_meta[signal->pipe]; + const unsigned int nr_domains = num_pm_domains(gpu); const struct etnaviv_pm_domain *dom; const struct etnaviv_pm_signal *sig;
- if (signal->domain >= meta->nr_domains) + if (signal->domain >= nr_domains) return -EINVAL;
- dom = meta->domains + signal->domain; + dom = pm_domain(gpu, signal->domain); + if (!dom) + return -EINVAL;
if (signal->iter >= dom->nr_signals) return -EINVAL;