[PATCH 3/4] drm/xe/xe_debugfs: Exposure of G10 residency counter

[Soham Purkait]

Add a debugfs node named g10_residency in order to obtain the G10
residency counter value.

Signed-off-by: Soham Purkait <soham.purkait at intel.com>
---
 drivers/gpu/drm/xe/xe_debugfs.c | 32 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_debugfs.h |  1 +
 2 files changed, 33 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index f9ab6a03af29..66eab5528b92 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -214,6 +214,30 @@ static ssize_t g8_residency_show(struct file *f, char __user *ubuf,
 	return simple_read_from_buffer(ubuf, size, pos, buf, len);
 }
 
+static ssize_t g10_residency_show(struct file *f, char __user *ubuf,
+				  size_t size, loff_t *pos)
+{
+	u64 reg_val;
+	char buf[32];
+	int len = 0;
+	int ret = 0;
+	struct xe_device *xe;
+	struct xe_mmio *mmio;
+
+	xe = file_inode(f)->i_private;
+	mmio = xe_root_tile_mmio(xe);
+	ret = xe_pmt_telem_read(to_pci_dev(xe->drm.dev),
+				xe_mmio_read32(mmio, PUNIT_TELEMETRY_GUID), &reg_val, BMG_G10_RESIDENCY_OFFSET,
+				sizeof(reg_val));
+
+	drm_warn(&xe->drm, "G10 Residency read from mbx 0x%016llx, ret %d\n",
+		 reg_val, ret);
+
+	len = scnprintf(buf, sizeof(buf), "%llu\n", reg_val);
+
+	return simple_read_from_buffer(ubuf, size, pos, buf, len);
+}
+
 static const struct file_operations wedged_mode_fops = {
 	.owner = THIS_MODULE,
 	.read = wedged_mode_show,
@@ -225,6 +249,11 @@ static const struct file_operations g8_residency_fops = {
 	.read = g8_residency_show,
 };
 
+static const struct file_operations g10_residency_fops = {
+	.owner = THIS_MODULE,
+	.read = g10_residency_show,
+};
+
 void xe_debugfs_register(struct xe_device *xe)
 {
 	struct ttm_device *bdev = &xe->ttm;
@@ -248,6 +277,9 @@ void xe_debugfs_register(struct xe_device *xe)
 	debugfs_create_file("g8_residency", 0444, root, xe,
 			    &g8_residency_fops);
 
+	debugfs_create_file("g10_residency", 0444, root, xe,
+			    &g10_residency_fops);
+    
 	for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) {
 		man = ttm_manager_type(bdev, mem_type);
 
diff --git a/drivers/gpu/drm/xe/xe_debugfs.h b/drivers/gpu/drm/xe/xe_debugfs.h
index 86868a3cd379..27fbb8d46471 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.h
+++ b/drivers/gpu/drm/xe/xe_debugfs.h
@@ -9,6 +9,7 @@
 struct xe_device;
 
 #define BMG_G8_RESIDENCY_OFFSET			(0x540)
+#define BMG_G10_RESIDENCY_OFFSET		(0x548)
 
 #ifdef CONFIG_DEBUG_FS
 void xe_debugfs_register(struct xe_device *xe);
-- 
2.34.1