From 89ea39c09d9cb8c89d82346ab81e124a35c65cd5 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, 23 Jan 2024 12:22:48 +0100
Subject: [PATCH] pan/perf: Reject panthor kernel driver

Make sure we reject perfcnt users when the kernel driver is not panfrost.
We might decide to abstract perf counters at the kmod level at some
point, but we're not there yet.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Antonino Maniscalco <antonino.maniscalco@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26358>
---
 src/panfrost/perf/pan_perf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/panfrost/perf/pan_perf.c b/src/panfrost/perf/pan_perf.c
index d64c27ca4b9..8f703fee70a 100644
--- a/src/panfrost/perf/pan_perf.c
+++ b/src/panfrost/perf/pan_perf.c
@@ -72,6 +72,13 @@ panfrost_lookup_counters(const char *name)
 void
 panfrost_perf_init(struct panfrost_perf *perf, int fd)
 {
+   ASSERTED drmVersionPtr version = drmGetVersion(fd);
+
+   /* We only support panfrost at the moment. */
+   assert(version && !strcmp(version->name, "panfrost"));
+
+   drmFreeVersion(version);
+
    perf->dev = pan_kmod_dev_create(fd, 0, NULL);
    assert(perf->dev);