diff options
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_drv.c')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_drv.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index a2ab99698ca8..97e5bc4a82c8 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -20,6 +20,7 @@ #include "panfrost_job.h" #include "panfrost_gpu.h" #include "panfrost_perfcnt.h" +#include "panfrost_debugfs.h" static bool unstable_ioctls; module_param_unsafe(unstable_ioctls, bool, 0600); @@ -267,6 +268,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data, job->requirements = args->requirements; job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev); job->mmu = file_priv->mmu; + job->engine_usage = &file_priv->engine_usage; slot = panfrost_job_get_slot(job); @@ -523,7 +525,56 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = { PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW), }; -DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops); +static void panfrost_gpu_show_fdinfo(struct panfrost_device *pfdev, + struct panfrost_file_priv *panfrost_priv, + struct drm_printer *p) +{ + int i; + + /* + * IMPORTANT NOTE: drm-cycles and drm-engine measurements are not + * accurate, as they only provide a rough estimation of the number of + * GPU cycles and CPU time spent in a given context. This is due to two + * different factors: + * - Firstly, we must consider the time the CPU and then the kernel + * takes to process the GPU interrupt, which means additional time and + * GPU cycles will be added in excess to the real figure. + * - Secondly, the pipelining done by the Job Manager (2 job slots per + * engine) implies there is no way to know exactly how much time each + * job spent on the GPU. + */ + + static const char * const engine_names[] = { + "fragment", "vertex-tiler", "compute-only" + }; + + BUILD_BUG_ON(ARRAY_SIZE(engine_names) != NUM_JOB_SLOTS); + + for (i = 0; i < NUM_JOB_SLOTS - 1; i++) { + drm_printf(p, "drm-engine-%s:\t%llu ns\n", + engine_names[i], panfrost_priv->engine_usage.elapsed_ns[i]); + drm_printf(p, "drm-cycles-%s:\t%llu\n", + engine_names[i], panfrost_priv->engine_usage.cycles[i]); + drm_printf(p, "drm-maxfreq-%s:\t%lu Hz\n", + engine_names[i], pfdev->pfdevfreq.fast_rate); + drm_printf(p, "drm-curfreq-%s:\t%lu Hz\n", + engine_names[i], pfdev->pfdevfreq.current_frequency); + } +} + +static void panfrost_show_fdinfo(struct drm_printer *p, struct drm_file *file) +{ + struct drm_device *dev = file->minor->dev; + struct panfrost_device *pfdev = dev->dev_private; + + panfrost_gpu_show_fdinfo(pfdev, file->driver_priv, p); +} + +static const struct file_operations panfrost_drm_driver_fops = { + .owner = THIS_MODULE, + DRM_GEM_FOPS, + .show_fdinfo = drm_show_fdinfo, +}; /* * Panfrost driver version: @@ -535,6 +586,7 @@ static const struct drm_driver panfrost_drm_driver = { .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ, .open = panfrost_open, .postclose = panfrost_postclose, + .show_fdinfo = panfrost_show_fdinfo, .ioctls = panfrost_drm_driver_ioctls, .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls), .fops = &panfrost_drm_driver_fops, @@ -546,6 +598,10 @@ static const struct drm_driver panfrost_drm_driver = { .gem_create_object = panfrost_gem_create_object, .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table, + +#ifdef CONFIG_DEBUG_FS + .debugfs_init = panfrost_debugfs_init, +#endif }; static int panfrost_probe(struct platform_device *pdev) |