[PATCH drm-next v5 14/14] drm/nouveau: debugfs: implement DRM GPU VA debugfs

Danilo Krummrich
2023-06-20T00:45:01Z

Provide the driver indirection iterating over all DRM GPU VA spaces to
enable the common 'gpuvas' debugfs file for dumping DRM GPU VA spaces.

Signed-off-by: Danilo Krummrich <dakr@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_debugfs.c | 39 +++++++++++++++++++++++
1 file changed, 39 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
index 99d022a91afc..053f703f2f68 100644
--- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -203,6 +203,44 @@ nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
}

+static void
+nouveau_debugfs_gpuva_regions(struct seq_file *m, struct nouveau_uvmm *uvmm)
+{
+ MA_STATE(mas, &uvmm->region_mt, 0, 0);
+ struct nouveau_uvma_region *reg;
+
+ seq_puts (m, " VA regions | start | range | end \n");
+ seq_puts (m, "----------------------------------------------------------------------------\n");
+ mas_for_each(&mas, reg, ULONG_MAX)
+ seq_printf(m, " | 0x%016llx | 0x%016llx | 0x%016llx\n",
+ reg->va.addr, reg->va.range, reg->va.addr + reg->va.range);
+}
+
+static int
+nouveau_debugfs_gpuva(struct seq_file *m, void *data)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
+ struct nouveau_cli *cli;
+
+ mutex_lock(&drm->clients_lock);
+ list_for_each_entry(cli, &drm->clients, head) {
+ struct nouveau_uvmm *uvmm = nouveau_cli_uvmm(cli);
+
+ if (!uvmm)
+ continue;
+
+ nouveau_uvmm_lock(uvmm);
+ drm_debugfs_gpuva_info(m, &uvmm->umgr);
+ seq_puts(m, "\n");
+ nouveau_debugfs_gpuva_regions(m, uvmm);
+ nouveau_uvmm_unlock(uvmm);
+ }
+ mutex_unlock(&drm->clients_lock);
+
+ return 0;
+}
+
static const struct file_operations nouveau_pstate_fops = {
.owner = THIS_MODULE,
.open = nouveau_debugfs_pstate_open,
@@ -214,6 +252,7 @@ static const struct file_operations nouveau_pstate_fops = {
static struct drm_info_list nouveau_debugfs_list[] = {
{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
{ "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
+ DRM_DEBUGFS_GPUVA_INFO(nouveau_debugfs_gpuva, NULL),
};
#define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)

--
2.40.1