1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2022 Intel Corporation
  4 */
  5
  6#include "xe_debugfs.h"
  7
  8#include <linux/debugfs.h>
  9#include <linux/fault-inject.h>
 10#include <linux/string_helpers.h>
 11
 12#include <drm/drm_debugfs.h>
 13
 14#include "xe_bo.h"
 15#include "xe_device.h"
 16#include "xe_force_wake.h"
 17#include "xe_gt_debugfs.h"
 18#include "xe_gt_printk.h"
 19#include "xe_guc_ads.h"
 20#include "xe_pm.h"
 21#include "xe_sriov.h"
 22#include "xe_step.h"
 23
 24#ifdef CONFIG_DRM_XE_DEBUG
 25#include "xe_bo_evict.h"
 26#include "xe_migrate.h"
 27#include "xe_vm.h"
 28#endif
 29
 30DECLARE_FAULT_ATTR(gt_reset_failure);
 31
 32static struct xe_device *node_to_xe(struct drm_info_node *node)
 33{
 34	return to_xe_device(node->minor->dev);
 35}
 36
 37static int info(struct seq_file *m, void *data)
 38{
 39	struct xe_device *xe = node_to_xe(m->private);
 40	struct drm_printer p = drm_seq_file_printer(m);
 41	struct xe_gt *gt;
 42	u8 id;
 43
 44	xe_pm_runtime_get(xe);
 45
 46	drm_printf(&p, "graphics_verx100 %d\n", xe->info.graphics_verx100);
 47	drm_printf(&p, "media_verx100 %d\n", xe->info.media_verx100);
 48	drm_printf(&p, "stepping G:%s M:%s B:%s\n",
 49		   xe_step_name(xe->info.step.graphics),
 50		   xe_step_name(xe->info.step.media),
 51		   xe_step_name(xe->info.step.basedie));
 52	drm_printf(&p, "is_dgfx %s\n", str_yes_no(xe->info.is_dgfx));
 53	drm_printf(&p, "platform %d\n", xe->info.platform);
 54	drm_printf(&p, "subplatform %d\n",
 55		   xe->info.subplatform > XE_SUBPLATFORM_NONE ? xe->info.subplatform : 0);
 56	drm_printf(&p, "devid 0x%x\n", xe->info.devid);
 57	drm_printf(&p, "revid %d\n", xe->info.revid);
 58	drm_printf(&p, "tile_count %d\n", xe->info.tile_count);
 59	drm_printf(&p, "vm_max_level %d\n", xe->info.vm_max_level);
 60	drm_printf(&p, "force_execlist %s\n", str_yes_no(xe->info.force_execlist));
 61	drm_printf(&p, "has_flat_ccs %s\n", str_yes_no(xe->info.has_flat_ccs));
 62	drm_printf(&p, "has_usm %s\n", str_yes_no(xe->info.has_usm));
 63	drm_printf(&p, "skip_guc_pc %s\n", str_yes_no(xe->info.skip_guc_pc));
 64	for_each_gt(gt, xe, id) {
 65		drm_printf(&p, "gt%d force wake %d\n", id,
 66			   xe_force_wake_ref(gt_to_fw(gt), XE_FW_GT));
 67		drm_printf(&p, "gt%d engine_mask 0x%llx\n", id,
 68			   gt->info.engine_mask);
 69	}
 70
 71	xe_pm_runtime_put(xe);
 72	return 0;
 73}
 74
 75static int sriov_info(struct seq_file *m, void *data)
 76{
 77	struct xe_device *xe = node_to_xe(m->private);
 78	struct drm_printer p = drm_seq_file_printer(m);
 79
 80	xe_sriov_print_info(xe, &p);
 81	return 0;
 82}
 83
 84static const struct drm_info_list debugfs_list[] = {
 85	{"info", info, 0},
 86	{ .name = "sriov_info", .show = sriov_info, },
 87};
 88
 89static int forcewake_open(struct inode *inode, struct file *file)
 90{
 91	struct xe_device *xe = inode->i_private;
 92	struct xe_gt *gt;
 93	u8 id, last_gt;
 94	unsigned int fw_ref;
 95
 96	xe_pm_runtime_get(xe);
 97	for_each_gt(gt, xe, id) {
 98		last_gt = id;
 99
100		fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
101		if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL))
102			goto err_fw_get;
103	}
104
105	return 0;
106
107err_fw_get:
108	for_each_gt(gt, xe, id) {
109		if (id < last_gt)
110			xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
111		else if (id == last_gt)
112			xe_force_wake_put(gt_to_fw(gt), fw_ref);
113		else
114			break;
115	}
116
117	xe_pm_runtime_put(xe);
118	return -ETIMEDOUT;
119}
120
121static int forcewake_release(struct inode *inode, struct file *file)
122{
123	struct xe_device *xe = inode->i_private;
124	struct xe_gt *gt;
125	u8 id;
126
127	for_each_gt(gt, xe, id)
128		xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
129	xe_pm_runtime_put(xe);
130
131	return 0;
132}
133
134static const struct file_operations forcewake_all_fops = {
135	.owner = THIS_MODULE,
136	.open = forcewake_open,
137	.release = forcewake_release,
138};
139
140static ssize_t wedged_mode_show(struct file *f, char __user *ubuf,
141				size_t size, loff_t *pos)
142{
143	struct xe_device *xe = file_inode(f)->i_private;
144	char buf[32];
145	int len = 0;
146
147	len = scnprintf(buf, sizeof(buf), "%d\n", xe->wedged.mode);
148
149	return simple_read_from_buffer(ubuf, size, pos, buf, len);
150}
151
152static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf,
153			       size_t size, loff_t *pos)
154{
155	struct xe_device *xe = file_inode(f)->i_private;
156	struct xe_gt *gt;
157	u32 wedged_mode;
158	ssize_t ret;
159	u8 id;
160
161	ret = kstrtouint_from_user(ubuf, size, 0, &wedged_mode);
162	if (ret)
163		return ret;
164
165	if (wedged_mode > 2)
166		return -EINVAL;
167
168	if (xe->wedged.mode == wedged_mode)
169		return 0;
170
171	xe->wedged.mode = wedged_mode;
172
173	xe_pm_runtime_get(xe);
174	for_each_gt(gt, xe, id) {
175		ret = xe_guc_ads_scheduler_policy_toggle_reset(&gt->uc.guc.ads);
176		if (ret) {
177			xe_gt_err(gt, "Failed to update GuC ADS scheduler policy. GuC may still cause engine reset even with wedged_mode=2\n");
178			return -EIO;
179		}
180	}
181	xe_pm_runtime_put(xe);
182
183	return size;
184}
185
186static const struct file_operations wedged_mode_fops = {
187	.owner = THIS_MODULE,
188	.read = wedged_mode_show,
189	.write = wedged_mode_set,
190};
191
192void xe_debugfs_register(struct xe_device *xe)
193{
194	struct ttm_device *bdev = &xe->ttm;
195	struct drm_minor *minor = xe->drm.primary;
196	struct dentry *root = minor->debugfs_root;
197	struct ttm_resource_manager *man;
198	struct xe_gt *gt;
199	u32 mem_type;
200	u8 id;
201
202	drm_debugfs_create_files(debugfs_list,
203				 ARRAY_SIZE(debugfs_list),
204				 root, minor);
205
206	debugfs_create_file("forcewake_all", 0400, root, xe,
207			    &forcewake_all_fops);
208
209	debugfs_create_file("wedged_mode", 0600, root, xe,
210			    &wedged_mode_fops);
211
212	for (mem_type = XE_PL_VRAM0; mem_type <= XE_PL_VRAM1; ++mem_type) {
213		man = ttm_manager_type(bdev, mem_type);
214
215		if (man) {
216			char name[16];
217
218			snprintf(name, sizeof(name), "vram%d_mm", mem_type - XE_PL_VRAM0);
219			ttm_resource_manager_create_debugfs(man, root, name);
220		}
221	}
222
223	man = ttm_manager_type(bdev, XE_PL_TT);
224	ttm_resource_manager_create_debugfs(man, root, "gtt_mm");
225
226	man = ttm_manager_type(bdev, XE_PL_STOLEN);
227	if (man)
228		ttm_resource_manager_create_debugfs(man, root, "stolen_mm");
229
230	for_each_gt(gt, xe, id)
231		xe_gt_debugfs_register(gt);
232
233	fault_create_debugfs_attr("fail_gt_reset", root, &gt_reset_failure);
234}