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authorBoris Brezillon <boris.brezillon@free-electrons.com>2018-01-12 12:09:26 +0300
committerEric Anholt <eric@anholt.net>2018-02-11 01:23:26 +0300
commit65101d8c9108201118efa7e08f4e2c57f438deb9 (patch)
tree3b2097206a11dcf36622a1c64fd5fee5d3dee15e /drivers/gpu/drm/vc4/vc4_drv.c
parent9c950e468cb5913d223282a05e6cd22fecce5ac8 (diff)
downloadlinux-65101d8c9108201118efa7e08f4e2c57f438deb9.tar.xz
drm/vc4: Expose performance counters to userspace
The V3D engine has various hardware counters which might be interesting to userspace performance analysis tools. Expose new ioctls to create/destroy a performance monitor object and query the counter values of this perfmance monitor. Note that a perfomance monitor is given an ID that is only valid on the file descriptor it has been allocated from. A performance monitor can be attached to a CL submission and the driver will enable HW counters for this request and update the performance monitor values at the end of the job. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/20180112090926.12538-1-boris.brezillon@free-electrons.com
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_drv.c')
-rw-r--r--drivers/gpu/drm/vc4/vc4_drv.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index ceb385fd69c5..94b99c90425a 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -101,6 +101,7 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
case DRM_VC4_PARAM_SUPPORTS_MADVISE:
+ case DRM_VC4_PARAM_SUPPORTS_PERFMON:
args->value = true;
break;
default:
@@ -111,6 +112,26 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
return 0;
}
+static int vc4_open(struct drm_device *dev, struct drm_file *file)
+{
+ struct vc4_file *vc4file;
+
+ vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
+ if (!vc4file)
+ return -ENOMEM;
+
+ vc4_perfmon_open_file(vc4file);
+ file->driver_priv = vc4file;
+ return 0;
+}
+
+static void vc4_close(struct drm_device *dev, struct drm_file *file)
+{
+ struct vc4_file *vc4file = file->driver_priv;
+
+ vc4_perfmon_close_file(vc4file);
+}
+
static const struct vm_operations_struct vc4_vm_ops = {
.fault = vc4_fault,
.open = drm_gem_vm_open,
@@ -143,6 +164,9 @@ static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
};
static struct drm_driver vc4_drm_driver = {
@@ -153,6 +177,8 @@ static struct drm_driver vc4_drm_driver = {
DRIVER_RENDER |
DRIVER_PRIME),
.lastclose = drm_fb_helper_lastclose,
+ .open = vc4_open,
+ .postclose = vc4_close,
.irq_handler = vc4_irq,
.irq_preinstall = vc4_irq_preinstall,
.irq_postinstall = vc4_irq_postinstall,