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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2020 Intel Corporation4 */5 6#include <linux/fs.h>7#include <drm/drm_print.h>8 9#include "gt/intel_gt_debugfs.h"10#include "intel_guc.h"11#include "intel_guc_log.h"12#include "intel_guc_log_debugfs.h"13#include "intel_uc.h"14 15static u32 obj_to_guc_log_dump_size(struct drm_i915_gem_object *obj)16{17 u32 size;18 19 if (!obj)20 return PAGE_SIZE;21 22 /* "0x%08x 0x%08x 0x%08x 0x%08x\n" => 16 bytes -> 44 chars => x2.75 */23 size = ((obj->base.size * 11) + 3) / 4;24 25 /* Add padding for final blank line, any extra header info, etc. */26 size = PAGE_ALIGN(size + PAGE_SIZE);27 28 return size;29}30 31static u32 guc_log_dump_size(struct intel_guc_log *log)32{33 struct intel_guc *guc = log_to_guc(log);34 35 if (!intel_guc_is_supported(guc))36 return PAGE_SIZE;37 38 if (!log->vma)39 return PAGE_SIZE;40 41 return obj_to_guc_log_dump_size(log->vma->obj);42}43 44static int guc_log_dump_show(struct seq_file *m, void *data)45{46 struct drm_printer p = drm_seq_file_printer(m);47 int ret;48 49 ret = intel_guc_log_dump(m->private, &p, false);50 51 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))52 pr_warn_once("preallocated size:%zx for %s exceeded\n",53 m->size, __func__);54 55 return ret;56}57DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_log_dump, guc_log_dump_size);58 59static u32 guc_load_err_dump_size(struct intel_guc_log *log)60{61 struct intel_guc *guc = log_to_guc(log);62 struct intel_uc *uc = container_of(guc, struct intel_uc, guc);63 64 if (!intel_guc_is_supported(guc))65 return PAGE_SIZE;66 67 return obj_to_guc_log_dump_size(uc->load_err_log);68}69 70static int guc_load_err_log_dump_show(struct seq_file *m, void *data)71{72 struct drm_printer p = drm_seq_file_printer(m);73 74 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM) && seq_has_overflowed(m))75 pr_warn_once("preallocated size:%zx for %s exceeded\n",76 m->size, __func__);77 78 return intel_guc_log_dump(m->private, &p, true);79}80DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE_WITH_SIZE(guc_load_err_log_dump, guc_load_err_dump_size);81 82static int guc_log_level_get(void *data, u64 *val)83{84 struct intel_guc_log *log = data;85 86 if (!log->vma)87 return -ENODEV;88 89 *val = intel_guc_log_get_level(log);90 91 return 0;92}93 94static int guc_log_level_set(void *data, u64 val)95{96 struct intel_guc_log *log = data;97 98 if (!log->vma)99 return -ENODEV;100 101 return intel_guc_log_set_level(log, val);102}103 104DEFINE_SIMPLE_ATTRIBUTE(guc_log_level_fops,105 guc_log_level_get, guc_log_level_set,106 "%lld\n");107 108static int guc_log_relay_open(struct inode *inode, struct file *file)109{110 struct intel_guc_log *log = inode->i_private;111 112 if (!intel_guc_is_ready(log_to_guc(log)))113 return -ENODEV;114 115 file->private_data = log;116 117 return intel_guc_log_relay_open(log);118}119 120static ssize_t121guc_log_relay_write(struct file *filp,122 const char __user *ubuf,123 size_t cnt,124 loff_t *ppos)125{126 struct intel_guc_log *log = filp->private_data;127 int val;128 int ret;129 130 ret = kstrtoint_from_user(ubuf, cnt, 0, &val);131 if (ret < 0)132 return ret;133 134 /*135 * Enable and start the guc log relay on value of 1.136 * Flush log relay for any other value.137 */138 if (val == 1)139 ret = intel_guc_log_relay_start(log);140 else141 intel_guc_log_relay_flush(log);142 143 return ret ?: cnt;144}145 146static int guc_log_relay_release(struct inode *inode, struct file *file)147{148 struct intel_guc_log *log = inode->i_private;149 150 intel_guc_log_relay_close(log);151 return 0;152}153 154static const struct file_operations guc_log_relay_fops = {155 .owner = THIS_MODULE,156 .open = guc_log_relay_open,157 .write = guc_log_relay_write,158 .release = guc_log_relay_release,159};160 161void intel_guc_log_debugfs_register(struct intel_guc_log *log,162 struct dentry *root)163{164 static const struct intel_gt_debugfs_file files[] = {165 { "guc_log_dump", &guc_log_dump_fops, NULL },166 { "guc_load_err_log_dump", &guc_load_err_log_dump_fops, NULL },167 { "guc_log_level", &guc_log_level_fops, NULL },168 { "guc_log_relay", &guc_log_relay_fops, NULL },169 };170 171 if (!intel_guc_is_supported(log_to_guc(log)))172 return;173 174 intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), log);175}176