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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include <linux/fs.h>
#include <drm/drm_print.h>
#include "gt/intel_gt_debugfs.h"
#include "intel_guc.h"
#include "intel_guc_log.h"
#include "intel_guc_log_debugfs.h"
#include "intel_uc.h"
static u32 obj_to_guc_log_dump_size(struct drm_i915_gem_object *obj)
{
u32 size;
if (!obj)
return PAGE_SIZE;
/* "0x%08x 0x%08x 0x%08x 0x%08x\n" => 16 bytes -> 44 chars => x2.75 */
size = ((obj->base.size * 11) + 3) / 4;
/* Add padding for final blank line, any extra header info, etc. */
size = PAGE_ALIGN(size + PAGE_SIZE);
return size;
}
static u32 guc_log_dump_size(struct intel_guc_log *log)
{
struct intel_guc *guc = log_to_guc(log);
if (!intel_guc_is_supported(guc))
return PAGE_SIZE;
if (!log->vma)
return PAGE_SIZE;
return obj_to_guc_log_dump_size(log->vma->obj);
}
static int guc_log_dump_show(struct seq_file *m, void *data)
{
struct drm_printer p = drm_seq_file_printer(m);
int ret;
ret = intel_guc_log_dump(m->private, &p, false);
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))
pr_warn_once("preallocated size:%zx for %s exceeded\n",
m->size, __func__);
return ret;
}
DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_log_dump, guc_log_dump_size);
static u32 guc_load_err_dump_size(struct intel_guc_log *log)
{
struct intel_guc *guc = log_to_guc(log);
struct intel_uc *uc = container_of(guc, struct intel_uc, guc);
if (!intel_guc_is_supported(guc))
return PAGE_SIZE;
return obj_to_guc_log_dump_size(uc->load_err_log);
}
static int guc_load_err_log_dump_show(struct seq_file *m, void *data)
{
struct drm_printer p = drm_seq_file_printer(m);
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))
pr_warn_once("preallocated size:%zx for %s exceeded\n",
m->size, __func__);
return intel_guc_log_dump(m->private, &p, true);
}
DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_load_err_log_dump, guc_load_err_dump_size);
static int guc_log_level_get(void *data, u64 *val)
{
struct intel_guc_log *log = data;
if (!log->vma)
return -ENODEV;
*val = intel_guc_log_get_level(log);
return 0;
}
static int guc_log_level_set(void *data, u64 val)
{
struct intel_guc_log *log = data;
if (!log->vma)
return -ENODEV;
return intel_guc_log_set_level(log, val);
}
DEFINE_SIMPLE_ATTRIBUTE(guc_log_level_fops,
guc_log_level_get, guc_log_level_set,
"%lld\n");
static int guc_log_relay_open(struct inode *inode, struct file *file)
{
struct intel_guc_log *log = inode->i_private;
if (!intel_guc_is_ready(log_to_guc(log)))
return -ENODEV;
file->private_data = log;
return intel_guc_log_relay_open(log);
}
static ssize_t
guc_log_relay_write(struct file *filp,
const char __user *ubuf,
size_t cnt,
loff_t *ppos)
{
struct intel_guc_log *log = filp->private_data;
int val;
int ret;
ret = kstrtoint_from_user(ubuf, cnt, 0, &val);
if (ret < 0)
return ret;
/*
* Enable and start the guc log relay on value of 1.
* Flush log relay for any other value.
*/
if (val == 1)
ret = intel_guc_log_relay_start(log);
else
intel_guc_log_relay_flush(log);
return ret ?: cnt;
}
static int guc_log_relay_release(struct inode *inode, struct file *file)
{
struct intel_guc_log *log = inode->i_private;
intel_guc_log_relay_close(log);
return 0;
}
static const struct file_operations guc_log_relay_fops = {
.owner = THIS_MODULE,
.open = guc_log_relay_open,
.write = guc_log_relay_write,
.release = guc_log_relay_release,
};
void intel_guc_log_debugfs_register(struct intel_guc_log *log,
struct dentry *root)
{
static const struct intel_gt_debugfs_file files[] = {
{ "guc_log_dump", &guc_log_dump_fops, NULL },
{ "guc_load_err_log_dump", &guc_load_err_log_dump_fops, NULL },
{ "guc_log_level", &guc_log_level_fops, NULL },
{ "guc_log_relay", &guc_log_relay_fops, NULL },
};
if (!intel_guc_is_supported(log_to_guc(log)))
return;
intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), log);
}
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