drm/xe/pf: Expose basic info about VFs in debugfs

We already have function to print summary about VFs, but we missed
to add debugfs attribute to make it visible. Do it now.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20250713103625.1964-6-michal.wajdeczko@intel.com

diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index 0e26658bcf7e7cc5fd4f59f565aabc61a4fe9d01..26e9d146ccbf6d8a6400e195b4797009c2a3740d 100644 (file)
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -20,6 +20,7 @@
 #include "xe_pm.h"
 #include "xe_pxp_debugfs.h"
 #include "xe_sriov.h"
+#include "xe_sriov_pf.h"
 #include "xe_step.h"
 #include "xe_wa.h"
 
@@ -293,4 +294,7 @@ void xe_debugfs_register(struct xe_device *xe)
        xe_pxp_debugfs_register(xe->pxp);
 
        fault_create_debugfs_attr("fail_gt_reset", root, &gt_reset_failure);
+
+       if (IS_SRIOV_PF(xe))
+               xe_sriov_pf_debugfs_register(xe, root);
 }

diff --git a/drivers/gpu/drm/xe/xe_sriov_pf.c b/drivers/gpu/drm/xe/xe_sriov_pf.c
index 0f721ae17b2662ac4aa4e08f63b7212d8d7ca7b6..331755843e10889e95358484167ad2848a59e40c 100644 (file)
--- a/drivers/gpu/drm/xe/xe_sriov_pf.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf.c
@@ -3,6 +3,8 @@
  * Copyright © 2023-2024 Intel Corporation
  */
 
+#include <linux/debugfs.h>
+#include <drm/drm_debugfs.h>
 #include <drm/drm_managed.h>
 
 #include "xe_assert.h"
@@ -102,3 +104,44 @@ void xe_sriov_pf_print_vfs_summary(struct xe_device *xe, struct drm_printer *p)
        drm_printf(p, "supported: %u\n", xe->sriov.pf.driver_max_vfs);
        drm_printf(p, "enabled: %u\n", pci_num_vf(pdev));
 }
+
+static int simple_show(struct seq_file *m, void *data)
+{
+       struct drm_printer p = drm_seq_file_printer(m);
+       struct drm_info_node *node = m->private;
+       struct dentry *parent = node->dent->d_parent;
+       struct xe_device *xe = parent->d_inode->i_private;
+       void (*print)(struct xe_device *, struct drm_printer *) = node->info_ent->data;
+
+       print(xe, &p);
+       return 0;
+}
+
+static const struct drm_info_list debugfs_list[] = {
+       { .name = "vfs", .show = simple_show, .data = xe_sriov_pf_print_vfs_summary },
+};
+
+/**
+ * xe_sriov_pf_debugfs_register - Register PF debugfs attributes.
+ * @xe: the &xe_device
+ * @root: the root &dentry
+ *
+ * Prepare debugfs attributes exposed by the PF.
+ */
+void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root)
+{
+       struct drm_minor *minor = xe->drm.primary;
+       struct dentry *parent;
+
+       /*
+        *      /sys/kernel/debug/dri/0/
+        *      ├── pf
+        *      │   ├── ...
+        */
+       parent = debugfs_create_dir("pf", root);
+       if (IS_ERR(parent))
+               return;
+       parent->d_inode->i_private = xe;
+
+       drm_debugfs_create_files(debugfs_list, ARRAY_SIZE(debugfs_list), parent, minor);
+}

diff --git a/drivers/gpu/drm/xe/xe_sriov_pf.h b/drivers/gpu/drm/xe/xe_sriov_pf.h
index d1220e70e1c0f98848214282ed85bc578ec6a530..c392c3fcf0852d6f2b4cdc5f70caf4b1eab5102f 100644 (file)
--- a/drivers/gpu/drm/xe/xe_sriov_pf.h
+++ b/drivers/gpu/drm/xe/xe_sriov_pf.h
@@ -8,12 +8,14 @@
 
 #include <linux/types.h>
 
+struct dentry;
 struct drm_printer;
 struct xe_device;
 
 #ifdef CONFIG_PCI_IOV
 bool xe_sriov_pf_readiness(struct xe_device *xe);
 int xe_sriov_pf_init_early(struct xe_device *xe);
+void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root);
 void xe_sriov_pf_print_vfs_summary(struct xe_device *xe, struct drm_printer *p);
 #else
 static inline bool xe_sriov_pf_readiness(struct xe_device *xe)
@@ -25,6 +27,10 @@ static inline int xe_sriov_pf_init_early(struct xe_device *xe)
 {
        return 0;
 }
+
+static inline void xe_sriov_pf_debugfs_register(struct xe_device *xe, struct dentry *root)
+{
+}
 #endif
 
 #endif