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From 2f862e4caa1c7df5ed6a3254a7c925f0dcbf357f Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Date: Mon, 9 Sep 2019 16:00:56 -0400
Subject: [PATCH 3768/4256] drm/amdgpu: Allow to reset to EERPOM table.
The table grows quickly during debug/development effort when
multiple RAS errors are injected. Allow to avoid this by setting
table header back to empty if needed.
v2: Switch to debugfs entry instead of load time parameter.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index a9aba06c9452..656e364a473d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -303,6 +303,22 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, const char __user *
return size;
}
+/**
+ * DOC: AMDGPU RAS debugfs EEPROM table reset interface
+ *
+ * Usage: echo 1 > ../ras/ras_eeprom_reset will reset EEPROM table to 0 entries.
+ */
+static ssize_t amdgpu_ras_debugfs_eeprom_write(struct file *f, const char __user *buf,
+ size_t size, loff_t *pos)
+{
+ struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
+ int ret;
+
+ ret = amdgpu_ras_eeprom_reset_table(&adev->psp.ras.ras->eeprom_control);
+
+ return ret == 1 ? size : -EIO;
+}
+
static const struct file_operations amdgpu_ras_debugfs_ctrl_ops = {
.owner = THIS_MODULE,
.read = NULL,
@@ -310,6 +326,13 @@ static const struct file_operations amdgpu_ras_debugfs_ctrl_ops = {
.llseek = default_llseek
};
+static const struct file_operations amdgpu_ras_debugfs_eeprom_ops = {
+ .owner = THIS_MODULE,
+ .read = NULL,
+ .write = amdgpu_ras_debugfs_eeprom_write,
+ .llseek = default_llseek
+};
+
static ssize_t amdgpu_ras_sysfs_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -951,6 +974,8 @@ static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
con->dir = debugfs_create_dir("ras", minor->debugfs_root);
con->ent = debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, con->dir,
adev, &amdgpu_ras_debugfs_ctrl_ops);
+ con->ent = debugfs_create_file("ras_eeprom_reset", S_IWUGO | S_IRUGO, con->dir,
+ adev, &amdgpu_ras_debugfs_eeprom_ops);
}
void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
--
2.17.1
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