On 10/11/2023 09:38, Jani Nikula wrote:
Hide gpu error specifics in i915_gpu_error.c. This is also cleaner wrt
conditional compilation, as i915_gpu_error.c is only built with
DRM_I915_CAPTURE_ERROR=y.
With this, we can also make i915_first_error_state() static.
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gpu_error.c | 75 ++++++++++++++++++++++++-
drivers/gpu/drm/i915/i915_gpu_error.h | 17 +++---
drivers/gpu/drm/i915/i915_sysfs.c | 79 +--------------------------
3 files changed, 86 insertions(+), 85 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index b4c8459deb7b..f9e750217f18 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -57,6 +57,7 @@
#include "i915_memcpy.h"
#include "i915_reg.h"
#include "i915_scatterlist.h"
+#include "i915_sysfs.h"
#include "i915_utils.h"
#define ALLOW_FAIL (__GFP_KSWAPD_RECLAIM | __GFP_RETRY_MAYFAIL | __GFP_NOWARN)
@@ -2208,7 +2209,7 @@ void i915_capture_error_state(struct intel_gt *gt,
i915_gpu_coredump_put(error);
}
-struct i915_gpu_coredump *
+static struct i915_gpu_coredump *
i915_first_error_state(struct drm_i915_private *i915)
{
struct i915_gpu_coredump *error;
@@ -2484,3 +2485,75 @@ void i915_gpu_error_debugfs_register(struct drm_i915_private *i915)
debugfs_create_file("i915_gpu_info", 0644, minor->debugfs_root, i915,
&i915_gpu_info_fops);
}
+
+static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+
+ struct device *kdev = kobj_to_dev(kobj);
+ struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
+ struct i915_gpu_coredump *gpu;
+ ssize_t ret = 0;
+
+ /*
+ * FIXME: Concurrent clients triggering resets and reading + clearing
+ * dumps can cause inconsistent sysfs reads when a user calls in with a
+ * non-zero offset to complete a prior partial read but the
+ * gpu_coredump has been cleared or replaced.
+ */
+
+ gpu = i915_first_error_state(i915);
+ if (IS_ERR(gpu)) {
+ ret = PTR_ERR(gpu);
+ } else if (gpu) {
+ ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count);
+ i915_gpu_coredump_put(gpu);
+ } else {
+ const char *str = "No error state collected\n";
+ size_t len = strlen(str);
+
+ if (off < len) {
+ ret = min_t(size_t, count, len - off);
+ memcpy(buf, str + off, ret);
+ }
+ }
Can this and the debugfs equivalent not be common code? It seems like
the implementations are conceptually the same even if the code currently
looks quite different.
John.
+
+ return ret;
+}
+
+static ssize_t error_state_write(struct file *file, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ struct device *kdev = kobj_to_dev(kobj);
+ struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
+
+ drm_dbg(&dev_priv->drm, "Resetting error state\n");
+ i915_reset_error_state(dev_priv);
+
+ return count;
+}
+
+static const struct bin_attribute error_state_attr = {
+ .attr.name = "error",
+ .attr.mode = S_IRUSR | S_IWUSR,
+ .size = 0,
+ .read = error_state_read,
+ .write = error_state_write,
+};
+
+void i915_gpu_error_sysfs_setup(struct drm_i915_private *i915)
+{
+ struct device *kdev = i915->drm.primary->kdev;
+
+ if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr))
+ drm_err(&i915->drm, "error_state sysfs setup failed\n");
+}
+
+void i915_gpu_error_sysfs_teardown(struct drm_i915_private *i915)
+{
+ struct device *kdev = i915->drm.primary->kdev;
+
+ sysfs_remove_bin_file(&kdev->kobj, &error_state_attr);
+}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h
index a6f2a7518cf0..68c964d6720a 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.h
+++ b/drivers/gpu/drm/i915/i915_gpu_error.h
@@ -323,11 +323,12 @@ static inline void i915_gpu_coredump_put(struct i915_gpu_coredump *gpu)
kref_put(&gpu->ref, __i915_gpu_coredump_free);
}
-struct i915_gpu_coredump *i915_first_error_state(struct drm_i915_private *i915);
void i915_reset_error_state(struct drm_i915_private *i915);
void i915_disable_error_state(struct drm_i915_private *i915, int err);
void i915_gpu_error_debugfs_register(struct drm_i915_private *i915);
+void i915_gpu_error_sysfs_setup(struct drm_i915_private *i915);
+void i915_gpu_error_sysfs_teardown(struct drm_i915_private *i915);
#else
@@ -396,12 +397,6 @@ static inline void i915_gpu_coredump_put(struct i915_gpu_coredump *gpu)
{
}
-static inline struct i915_gpu_coredump *
-i915_first_error_state(struct drm_i915_private *i915)
-{
- return ERR_PTR(-ENODEV);
-}
-
static inline void i915_reset_error_state(struct drm_i915_private *i915)
{
}
@@ -415,6 +410,14 @@ static inline void i915_gpu_error_debugfs_register(struct drm_i915_private *i915
{
}
+static inline void i915_gpu_error_sysfs_setup(struct drm_i915_private *i915)
+{
+}
+
+static inline void i915_gpu_error_sysfs_teardown(struct drm_i915_private *i915)
+{
+}
+
#endif /* IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) */
#endif /* _I915_GPU_ERROR_H_ */
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index e88bb4f04305..613decd47760 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -155,81 +155,6 @@ static const struct bin_attribute dpf_attrs_1 = {
.private = (void *)1
};
-#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
-
-static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *attr, char *buf,
- loff_t off, size_t count)
-{
-
- struct device *kdev = kobj_to_dev(kobj);
- struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
- struct i915_gpu_coredump *gpu;
- ssize_t ret = 0;
-
- /*
- * FIXME: Concurrent clients triggering resets and reading + clearing
- * dumps can cause inconsistent sysfs reads when a user calls in with a
- * non-zero offset to complete a prior partial read but the
- * gpu_coredump has been cleared or replaced.
- */
-
- gpu = i915_first_error_state(i915);
- if (IS_ERR(gpu)) {
- ret = PTR_ERR(gpu);
- } else if (gpu) {
- ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count);
- i915_gpu_coredump_put(gpu);
- } else {
- const char *str = "No error state collected\n";
- size_t len = strlen(str);
-
- if (off < len) {
- ret = min_t(size_t, count, len - off);
- memcpy(buf, str + off, ret);
- }
- }
-
- return ret;
-}
-
-static ssize_t error_state_write(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr, char *buf,
- loff_t off, size_t count)
-{
- struct device *kdev = kobj_to_dev(kobj);
- struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
-
- drm_dbg(&dev_priv->drm, "Resetting error state\n");
- i915_reset_error_state(dev_priv);
-
- return count;
-}
-
-static const struct bin_attribute error_state_attr = {
- .attr.name = "error",
- .attr.mode = S_IRUSR | S_IWUSR,
- .size = 0,
- .read = error_state_read,
- .write = error_state_write,
-};
-
-static void i915_setup_error_capture(struct device *kdev)
-{
- if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr))
- drm_err(&kdev_minor_to_i915(kdev)->drm,
- "error_state sysfs setup failed\n");
-}
-
-static void i915_teardown_error_capture(struct device *kdev)
-{
- sysfs_remove_bin_file(&kdev->kobj, &error_state_attr);
-}
-#else
-static void i915_setup_error_capture(struct device *kdev) {}
-static void i915_teardown_error_capture(struct device *kdev) {}
-#endif
-
void i915_setup_sysfs(struct drm_i915_private *dev_priv)
{
struct device *kdev = dev_priv->drm.primary->kdev;
@@ -255,7 +180,7 @@ void i915_setup_sysfs(struct drm_i915_private *dev_priv)
drm_warn(&dev_priv->drm,
"failed to register GT sysfs directory\n");
- i915_setup_error_capture(kdev);
+ i915_gpu_error_sysfs_setup(dev_priv);
intel_engines_add_sysfs(dev_priv);
}
@@ -264,7 +189,7 @@ void i915_teardown_sysfs(struct drm_i915_private *dev_priv)
{
struct device *kdev = dev_priv->drm.primary->kdev;
- i915_teardown_error_capture(kdev);
+ i915_gpu_error_sysfs_teardown(dev_priv);
device_remove_bin_file(kdev, &dpf_attrs_1);
device_remove_bin_file(kdev, &dpf_attrs);
