[RFC 03/10] drm/amdgpu: introduce PMC ioctl handler

[Zhu Lingshan <lingshan.zhu@amd.com>]

This commit introduces ioctl handler for PMC.

In this commit, the handler only performs
basic checkings, including permission and whether
user queues are enabled.

Signed-off-by: Zhu Lingshan <lingshan.zhu@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_profiler.c | 28 +++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_profiler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_profiler.c
index 04902696adab..feff37279575 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_profiler.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_profiler.c
@@ -23,9 +23,35 @@
  */
 
 #include <linux/errno.h>
+#include <linux/capability.h>
 #include <drm/amdgpu_drm.h>
+#include "amdgpu.h"
+#include "amdgpu_userq.h"
 #include "amdgpu_profiler.h"
 
+static int amdgpu_profiler_check_access(struct drm_device *dev)
+{
+	if (!perfmon_capable())
+		return -EPERM;
+
+	if (!amdgpu_userq_enabled(dev))
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
+static int amdgpu_profiler_pmc(struct drm_device *dev, struct drm_file *filp,
+			       bool enable)
+{
+	int ret;
+
+	ret = amdgpu_profiler_check_access(dev);
+	if (ret)
+		return ret;
+
+	return -EOPNOTSUPP;
+}
+
 int amdgpu_profiler_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 {
 	struct drm_amdgpu_profiler_args *args = data;
@@ -37,7 +63,7 @@ int amdgpu_profiler_ioctl(struct drm_device *dev, void *data, struct drm_file *f
 	case AMDGPU_PROFILER_OP_RESERVE:
 		return -EOPNOTSUPP;
 	case AMDGPU_PROFILER_OP_PMC:
-		return -EOPNOTSUPP;
+		return amdgpu_profiler_pmc(dev, filp, args->perfcount_enable);
 	default:
 		return -EINVAL;
 	}
-- 
2.55.0