drm/vc4: Warn if some v3d code is run on BCM2711

The BCM2711 has a separate driver for the v3d, and thus we can't call
into any of the driver entrypoints that rely on the v3d being there.

Let's add a bunch of checks and complain loudly if that ever happen.

Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220610115149.964394-15-maxime@cerno.tech

11 files changed, 211 insertions, 1 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
index 3ca16d682fc0..b8d856312846 100644
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -248,6 +248,9 @@ void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	mutex_lock(&vc4->purgeable.lock);
 	list_add_tail(&bo->size_head, &vc4->purgeable.list);
 	vc4->purgeable.num++;
@@ -259,6 +262,9 @@ static void vc4_bo_remove_from_purgeable_pool_locked(struct vc4_bo *bo)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	/* list_del_init() is used here because the caller might release
 	 * the purgeable lock in order to acquire the madv one and update the
 	 * madv status.
@@ -387,6 +393,9 @@ struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_bo *bo;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return ERR_PTR(-ENODEV);
+
 	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
 	if (!bo)
 		return ERR_PTR(-ENOMEM);
@@ -413,6 +422,9 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
 	struct drm_gem_cma_object *cma_obj;
 	struct vc4_bo *bo;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return ERR_PTR(-ENODEV);
+
 	if (size == 0)
 		return ERR_PTR(-EINVAL);
 
@@ -475,9 +487,13 @@ int vc4_bo_dumb_create(struct drm_file *file_priv,
 		       struct drm_device *dev,
 		       struct drm_mode_create_dumb *args)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_bo *bo = NULL;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	ret = vc4_dumb_fixup_args(args);
 	if (ret)
 		return ret;
@@ -598,8 +614,12 @@ static void vc4_bo_cache_time_work(struct work_struct *work)
 
 int vc4_bo_inc_usecnt(struct vc4_bo *bo)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	/* Fast path: if the BO is already retained by someone, no need to
 	 * check the madv status.
 	 */
@@ -634,6 +654,11 @@ int vc4_bo_inc_usecnt(struct vc4_bo *bo)
 
 void vc4_bo_dec_usecnt(struct vc4_bo *bo)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
+
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	/* Fast path: if the BO is still retained by someone, no need to test
 	 * the madv value.
 	 */
@@ -753,6 +778,9 @@ int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
 	struct vc4_bo *bo = NULL;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	ret = vc4_grab_bin_bo(vc4, vc4file);
 	if (ret)
 		return ret;
@@ -776,9 +804,13 @@ int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
 int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
 		      struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_vc4_mmap_bo *args = data;
 	struct drm_gem_object *gem_obj;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
 	if (!gem_obj) {
 		DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
@@ -802,6 +834,9 @@ vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
 	struct vc4_bo *bo = NULL;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (args->size == 0)
 		return -EINVAL;
 
@@ -872,11 +907,15 @@ fail:
 int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_vc4_set_tiling *args = data;
 	struct drm_gem_object *gem_obj;
 	struct vc4_bo *bo;
 	bool t_format;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (args->flags != 0)
 		return -EINVAL;
 
@@ -915,10 +954,14 @@ int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
 int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_vc4_get_tiling *args = data;
 	struct drm_gem_object *gem_obj;
 	struct vc4_bo *bo;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (args->flags != 0 || args->modifier != 0)
 		return -EINVAL;
 
@@ -945,6 +988,9 @@ int vc4_bo_cache_init(struct drm_device *dev)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	int i;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	/* Create the initial set of BO labels that the kernel will
 	 * use.  This lets us avoid a bunch of string reallocation in
 	 * the kernel's draw and BO allocation paths.
@@ -1004,6 +1050,9 @@ int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
 	struct drm_gem_object *gem_obj;
 	int ret = 0, label;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!args->len)
 		return -EINVAL;
 
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index ef4ab0563168..0f0f0263e744 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -99,6 +99,9 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
 	if (args->pad != 0)
 		return -EINVAL;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d)
 		return -ENODEV;
 
@@ -142,11 +145,16 @@ static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
 
 static int vc4_open(struct drm_device *dev, struct drm_file *file)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_file *vc4file;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
 	if (!vc4file)
 		return -ENOMEM;
+	vc4file->dev = vc4;
 
 	vc4_perfmon_open_file(vc4file);
 	file->driver_priv = vc4file;
@@ -158,6 +166,9 @@ static void vc4_close(struct drm_device *dev, struct drm_file *file)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_file *vc4file = file->driver_priv;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (vc4file->bin_bo_used)
 		vc4_v3d_bin_bo_put(vc4);
 
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index 9c324c12c410..93fd55b9e99e 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -48,6 +48,8 @@ enum vc4_kernel_bo_type {
  * done. This way, only events related to a specific job will be counted.
  */
 struct vc4_perfmon {
+	struct vc4_dev *dev;
+
 	/* Tracks the number of users of the perfmon, when this counter reaches
 	 * zero the perfmon is destroyed.
 	 */
@@ -580,6 +582,8 @@ to_vc4_crtc_state(struct drm_crtc_state *crtc_state)
 #define VC4_REG32(reg) { .name = #reg, .offset = reg }
 
 struct vc4_exec_info {
+	struct vc4_dev *dev;
+
 	/* Sequence number for this bin/render job. */
 	uint64_t seqno;
 
@@ -701,6 +705,8 @@ struct vc4_exec_info {
  * released when the DRM file is closed should be placed here.
  */
 struct vc4_file {
+	struct vc4_dev *dev;
+
 	struct {
 		struct idr idr;
 		struct mutex lock;
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 9eaf304fc20d..fe10d9c3fff8 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -76,6 +76,9 @@ vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
 	u32 i;
 	int ret = 0;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d) {
 		DRM_DEBUG("VC4_GET_HANG_STATE with no VC4 V3D probed\n");
 		return -ENODEV;
@@ -386,6 +389,9 @@ vc4_wait_for_seqno(struct drm_device *dev, uint64_t seqno, uint64_t timeout_ns,
 	unsigned long timeout_expire;
 	DEFINE_WAIT(wait);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (vc4->finished_seqno >= seqno)
 		return 0;
 
@@ -468,6 +474,9 @@ vc4_submit_next_bin_job(struct drm_device *dev)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_exec_info *exec;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 again:
 	exec = vc4_first_bin_job(vc4);
 	if (!exec)
@@ -513,6 +522,9 @@ vc4_submit_next_render_job(struct drm_device *dev)
 	if (!exec)
 		return;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	/* A previous RCL may have written to one of our textures, and
 	 * our full cache flush at bin time may have occurred before
 	 * that RCL completed.  Flush the texture cache now, but not
@@ -531,6 +543,9 @@ vc4_move_job_to_render(struct drm_device *dev, struct vc4_exec_info *exec)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	bool was_empty = list_empty(&vc4->render_job_list);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	list_move_tail(&exec->head, &vc4->render_job_list);
 	if (was_empty)
 		vc4_submit_next_render_job(dev);
@@ -997,6 +1012,9 @@ vc4_job_handle_completed(struct vc4_dev *vc4)
 	unsigned long irqflags;
 	struct vc4_seqno_cb *cb, *cb_temp;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	spin_lock_irqsave(&vc4->job_lock, irqflags);
 	while (!list_empty(&vc4->job_done_list)) {
 		struct vc4_exec_info *exec =
@@ -1033,6 +1051,9 @@ int vc4_queue_seqno_cb(struct drm_device *dev,
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	unsigned long irqflags;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	cb->func = func;
 	INIT_WORK(&cb->work, vc4_seqno_cb_work);
 
@@ -1083,8 +1104,12 @@ int
 vc4_wait_seqno_ioctl(struct drm_device *dev, void *data,
 		     struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_vc4_wait_seqno *args = data;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	return vc4_wait_for_seqno_ioctl_helper(dev, args->seqno,
 					       &args->timeout_ns);
 }
@@ -1093,11 +1118,15 @@ int
 vc4_wait_bo_ioctl(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	int ret;
 	struct drm_vc4_wait_bo *args = data;
 	struct drm_gem_object *gem_obj;
 	struct vc4_bo *bo;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (args->pad != 0)
 		return -EINVAL;
 
@@ -1144,6 +1173,9 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
 				  args->shader_rec_size,
 				  args->bo_handle_count);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d) {
 		DRM_DEBUG("VC4_SUBMIT_CL with no VC4 V3D probed\n");
 		return -ENODEV;
@@ -1167,6 +1199,7 @@ vc4_submit_cl_ioctl(struct drm_device *dev, void *data,
 		DRM_ERROR("malloc failure on exec struct\n");
 		return -ENOMEM;
 	}
+	exec->dev = vc4;
 
 	ret = vc4_v3d_pm_get(vc4);
 	if (ret) {
@@ -1276,6 +1309,9 @@ int vc4_gem_init(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	vc4->dma_fence_context = dma_fence_context_alloc(1);
 
 	INIT_LIST_HEAD(&vc4->bin_job_list);
@@ -1321,11 +1357,15 @@ static void vc4_gem_destroy(struct drm_device *dev, void *unused)
 int vc4_gem_madvise_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *file_priv)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_vc4_gem_madvise *args = data;
 	struct drm_gem_object *gem_obj;
 	struct vc4_bo *bo;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	switch (args->madv) {
 	case VC4_MADV_DONTNEED:
 	case VC4_MADV_WILLNEED:
diff --git a/drivers/gpu/drm/vc4/vc4_irq.c b/drivers/gpu/drm/vc4/vc4_irq.c
index 4342fb43e8c1..2eacfb6773d2 100644
--- a/drivers/gpu/drm/vc4/vc4_irq.c
+++ b/drivers/gpu/drm/vc4/vc4_irq.c
@@ -265,6 +265,9 @@ vc4_irq_enable(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (!vc4->v3d)
 		return;
 
@@ -279,6 +282,9 @@ vc4_irq_disable(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (!vc4->v3d)
 		return;
 
@@ -296,8 +302,12 @@ vc4_irq_disable(struct drm_device *dev)
 
 int vc4_irq_install(struct drm_device *dev, int irq)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (irq == IRQ_NOTCONNECTED)
 		return -ENOTCONN;
 
@@ -316,6 +326,9 @@ void vc4_irq_uninstall(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	vc4_irq_disable(dev);
 	free_irq(vc4->irq, dev);
 }
@@ -326,6 +339,9 @@ void vc4_irq_reset(struct drm_device *dev)
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	unsigned long irqflags;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	/* Acknowledge any stale IRQs. */
 	V3D_WRITE(V3D_INTCTL, V3D_DRIVER_IRQS);
 
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c
index 1d3b31fb71ea..893d831b24aa 100644
--- a/drivers/gpu/drm/vc4/vc4_kms.c
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
@@ -479,8 +479,12 @@ static struct drm_framebuffer *vc4_fb_create(struct drm_device *dev,
 					     struct drm_file *file_priv,
 					     const struct drm_mode_fb_cmd2 *mode_cmd)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct drm_mode_fb_cmd2 mode_cmd_local;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return ERR_PTR(-ENODEV);
+
 	/* If the user didn't specify a modifier, use the
 	 * vc4_set_tiling_ioctl() state for the BO.
 	 */
diff --git a/drivers/gpu/drm/vc4/vc4_perfmon.c b/drivers/gpu/drm/vc4/vc4_perfmon.c
index 18abc06335c1..c7f5adb6bcf8 100644
--- a/drivers/gpu/drm/vc4/vc4_perfmon.c
+++ b/drivers/gpu/drm/vc4/vc4_perfmon.c
@@ -17,13 +17,27 @@
 
 void vc4_perfmon_get(struct vc4_perfmon *perfmon)
 {
+	struct vc4_dev *vc4 = perfmon->dev;
+
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (perfmon)
 		refcount_inc(&perfmon->refcnt);
 }
 
 void vc4_perfmon_put(struct vc4_perfmon *perfmon)
 {
-	if (perfmon && refcount_dec_and_test(&perfmon->refcnt))
+	struct vc4_dev *vc4;
+
+	if (!perfmon)
+		return;
+
+	vc4 = perfmon->dev;
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
+	if (refcount_dec_and_test(&perfmon->refcnt))
 		kfree(perfmon);
 }
 
@@ -32,6 +46,9 @@ void vc4_perfmon_start(struct vc4_dev *vc4, struct vc4_perfmon *perfmon)
 	unsigned int i;
 	u32 mask;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (WARN_ON_ONCE(!perfmon || vc4->active_perfmon))
 		return;
 
@@ -49,6 +66,9 @@ void vc4_perfmon_stop(struct vc4_dev *vc4, struct vc4_perfmon *perfmon,
 {
 	unsigned int i;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	if (WARN_ON_ONCE(!vc4->active_perfmon ||
 			 perfmon != vc4->active_perfmon))
 		return;
@@ -64,8 +84,12 @@ void vc4_perfmon_stop(struct vc4_dev *vc4, struct vc4_perfmon *perfmon,
 
 struct vc4_perfmon *vc4_perfmon_find(struct vc4_file *vc4file, int id)
 {
+	struct vc4_dev *vc4 = vc4file->dev;
 	struct vc4_perfmon *perfmon;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return NULL;
+
 	mutex_lock(&vc4file->perfmon.lock);
 	perfmon = idr_find(&vc4file->perfmon.idr, id);
 	vc4_perfmon_get(perfmon);
@@ -76,8 +100,14 @@ struct vc4_perfmon *vc4_perfmon_find(struct vc4_file *vc4file, int id)
 
 void vc4_perfmon_open_file(struct vc4_file *vc4file)
 {
+	struct vc4_dev *vc4 = vc4file->dev;
+
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	mutex_init(&vc4file->perfmon.lock);
 	idr_init_base(&vc4file->perfmon.idr, VC4_PERFMONID_MIN);
+	vc4file->dev = vc4;
 }
 
 static int vc4_perfmon_idr_del(int id, void *elem, void *data)
@@ -91,6 +121,11 @@ static int vc4_perfmon_idr_del(int id, void *elem, void *data)
 
 void vc4_perfmon_close_file(struct vc4_file *vc4file)
 {
+	struct vc4_dev *vc4 = vc4file->dev;
+
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	mutex_lock(&vc4file->perfmon.lock);
 	idr_for_each(&vc4file->perfmon.idr, vc4_perfmon_idr_del, NULL);
 	idr_destroy(&vc4file->perfmon.idr);
@@ -107,6 +142,9 @@ int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
 	unsigned int i;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d) {
 		DRM_DEBUG("Creating perfmon no VC4 V3D probed\n");
 		return -ENODEV;
@@ -127,6 +165,7 @@ int vc4_perfmon_create_ioctl(struct drm_device *dev, void *data,
 			  GFP_KERNEL);
 	if (!perfmon)
 		return -ENOMEM;
+	perfmon->dev = vc4;
 
 	for (i = 0; i < req->ncounters; i++)
 		perfmon->events[i] = req->events[i];
@@ -157,6 +196,9 @@ int vc4_perfmon_destroy_ioctl(struct drm_device *dev, void *data,
 	struct drm_vc4_perfmon_destroy *req = data;
 	struct vc4_perfmon *perfmon;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d) {
 		DRM_DEBUG("Destroying perfmon no VC4 V3D probed\n");
 		return -ENODEV;
@@ -182,6 +224,9 @@ int vc4_perfmon_get_values_ioctl(struct drm_device *dev, void *data,
 	struct vc4_perfmon *perfmon;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (!vc4->v3d) {
 		DRM_DEBUG("Getting perfmon no VC4 V3D probed\n");
 		return -ENODEV;
diff --git a/drivers/gpu/drm/vc4/vc4_render_cl.c b/drivers/gpu/drm/vc4/vc4_render_cl.c
index 3c918eeaf56e..f6b7dc3df08c 100644
--- a/drivers/gpu/drm/vc4/vc4_render_cl.c
+++ b/drivers/gpu/drm/vc4/vc4_render_cl.c
@@ -593,11 +593,15 @@ vc4_rcl_render_config_surface_setup(struct vc4_exec_info *exec,
 
 int vc4_get_rcl(struct drm_device *dev, struct vc4_exec_info *exec)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	struct vc4_rcl_setup setup = {0};
 	struct drm_vc4_submit_cl *args = exec->args;
 	bool has_bin = args->bin_cl_size != 0;
 	int ret;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	if (args->min_x_tile > args->max_x_tile ||
 	    args->min_y_tile > args->max_y_tile) {
 		DRM_DEBUG("Bad render tile set (%d,%d)-(%d,%d)\n",
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c
index 7bb3067f8425..cc714dcfe1f2 100644
--- a/drivers/gpu/drm/vc4/vc4_v3d.c
+++ b/drivers/gpu/drm/vc4/vc4_v3d.c
@@ -127,6 +127,9 @@ static int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 int
 vc4_v3d_pm_get(struct vc4_dev *vc4)
 {
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	mutex_lock(&vc4->power_lock);
 	if (vc4->power_refcount++ == 0) {
 		int ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev);
@@ -145,6 +148,9 @@ vc4_v3d_pm_get(struct vc4_dev *vc4)
 void
 vc4_v3d_pm_put(struct vc4_dev *vc4)
 {
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	mutex_lock(&vc4->power_lock);
 	if (--vc4->power_refcount == 0) {
 		pm_runtime_mark_last_busy(&vc4->v3d->pdev->dev);
@@ -172,6 +178,9 @@ int vc4_v3d_get_bin_slot(struct vc4_dev *vc4)
 	uint64_t seqno = 0;
 	struct vc4_exec_info *exec;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 try_again:
 	spin_lock_irqsave(&vc4->job_lock, irqflags);
 	slot = ffs(~vc4->bin_alloc_used);
@@ -316,6 +325,9 @@ int vc4_v3d_bin_bo_get(struct vc4_dev *vc4, bool *used)
 {
 	int ret = 0;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	mutex_lock(&vc4->bin_bo_lock);
 
 	if (used && *used)
@@ -348,6 +360,9 @@ static void bin_bo_release(struct kref *ref)
 
 void vc4_v3d_bin_bo_put(struct vc4_dev *vc4)
 {
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return;
+
 	mutex_lock(&vc4->bin_bo_lock);
 	kref_put(&vc4->bin_bo_kref, bin_bo_release);
 	mutex_unlock(&vc4->bin_bo_lock);
diff --git a/drivers/gpu/drm/vc4/vc4_validate.c b/drivers/gpu/drm/vc4/vc4_validate.c
index eec76af49f04..833eb623d545 100644
--- a/drivers/gpu/drm/vc4/vc4_validate.c
+++ b/drivers/gpu/drm/vc4/vc4_validate.c
@@ -105,9 +105,13 @@ size_is_lt(uint32_t width, uint32_t height, int cpp)
 struct drm_gem_cma_object *
 vc4_use_bo(struct vc4_exec_info *exec, uint32_t hindex)
 {
+	struct vc4_dev *vc4 = exec->dev;
 	struct drm_gem_cma_object *obj;
 	struct vc4_bo *bo;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return NULL;
+
 	if (hindex >= exec->bo_count) {
 		DRM_DEBUG("BO index %d greater than BO count %d\n",
 			  hindex, exec->bo_count);
@@ -160,10 +164,14 @@ vc4_check_tex_size(struct vc4_exec_info *exec, struct drm_gem_cma_object *fbo,
 		   uint32_t offset, uint8_t tiling_format,
 		   uint32_t width, uint32_t height, uint8_t cpp)
 {
+	struct vc4_dev *vc4 = exec->dev;
 	uint32_t aligned_width, aligned_height, stride, size;
 	uint32_t utile_w = utile_width(cpp);
 	uint32_t utile_h = utile_height(cpp);
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	/* The shaded vertex format stores signed 12.4 fixed point
 	 * (-2048,2047) offsets from the viewport center, so we should
 	 * never have a render target larger than 4096.  The texture
@@ -482,10 +490,14 @@ vc4_validate_bin_cl(struct drm_device *dev,
 		    void *unvalidated,
 		    struct vc4_exec_info *exec)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	uint32_t len = exec->args->bin_cl_size;
 	uint32_t dst_offset = 0;
 	uint32_t src_offset = 0;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	while (src_offset < len) {
 		void *dst_pkt = validated + dst_offset;
 		void *src_pkt = unvalidated + src_offset;
@@ -926,9 +938,13 @@ int
 vc4_validate_shader_recs(struct drm_device *dev,
 			 struct vc4_exec_info *exec)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	uint32_t i;
 	int ret = 0;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return -ENODEV;
+
 	for (i = 0; i < exec->shader_state_count; i++) {
 		ret = validate_gl_shader_rec(dev, exec, &exec->shader_state[i]);
 		if (ret)
diff --git a/drivers/gpu/drm/vc4/vc4_validate_shaders.c b/drivers/gpu/drm/vc4/vc4_validate_shaders.c
index 7cf82b071de2..e315aeb5fef5 100644
--- a/drivers/gpu/drm/vc4/vc4_validate_shaders.c
+++ b/drivers/gpu/drm/vc4/vc4_validate_shaders.c
@@ -778,6 +778,7 @@ vc4_handle_branch_target(struct vc4_shader_validation_state *validation_state)
 struct vc4_validated_shader_info *
 vc4_validate_shader(struct drm_gem_cma_object *shader_obj)
 {
+	struct vc4_dev *vc4 = to_vc4_dev(shader_obj->base.dev);
 	bool found_shader_end = false;
 	int shader_end_ip = 0;
 	uint32_t last_thread_switch_ip = -3;
@@ -785,6 +786,9 @@ vc4_validate_shader(struct drm_gem_cma_object *shader_obj)
 	struct vc4_validated_shader_info *validated_shader = NULL;
 	struct vc4_shader_validation_state validation_state;
 
+	if (WARN_ON_ONCE(vc4->is_vc5))
+		return NULL;
+
 	memset(&validation_state, 0, sizeof(validation_state));
 	validation_state.shader = shader_obj->vaddr;
 	validation_state.max_ip = shader_obj->base.size / sizeof(uint64_t);