1 // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
2 /*
3 *
4 * (C) COPYRIGHT 2022 ARM Limited. All rights reserved.
5 *
6 * This program is free software and is provided to you under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation, and any use by you of this program is subject to the terms
9 * of such GNU license.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, you can access it online at
18 * http://www.gnu.org/licenses/gpl-2.0.html.
19 *
20 */
21
22 /*
23 * Debugfs interface to dump information about GPU_VA memory zones
24 */
25
26 #include "mali_kbase_debug_mem_zones.h"
27 #include "mali_kbase.h"
28
29 #include <linux/list.h>
30 #include <linux/file.h>
31
32 #if IS_ENABLED(CONFIG_DEBUG_FS)
33
34 /**
35 * debug_mem_zones_show - Show information about GPU_VA memory zones
36 * @sfile: The debugfs entry
37 * @data: Data associated with the entry
38 *
39 * This function is called to get the contents of the @c mem_zones debugfs file.
40 * This lists the start address and size (in pages) of each initialized memory
41 * zone within GPU_VA memory.
42 *
43 * Return:
44 * 0 if successfully prints data in debugfs entry file
45 * -1 if it encountered an error
46 */
debug_mem_zones_show(struct seq_file * sfile,void * data)47 static int debug_mem_zones_show(struct seq_file *sfile, void *data)
48 {
49 struct kbase_context *const kctx = sfile->private;
50 size_t i;
51
52 const char *zone_names[KBASE_REG_ZONE_MAX] = {
53 "SAME_VA",
54 "CUSTOM_VA",
55 "EXEC_VA"
56 #if MALI_USE_CSF
57 ,
58 "MCU_SHARED_VA",
59 "EXEC_FIXED_VA",
60 "FIXED_VA"
61 #endif
62 };
63
64 kbase_gpu_vm_lock(kctx);
65
66 for (i = 0; i < KBASE_REG_ZONE_MAX; i++) {
67 struct kbase_reg_zone *reg_zone = &kctx->reg_zone[i];
68
69 if (reg_zone->base_pfn) {
70 seq_printf(sfile, "%15s %zu 0x%.16llx 0x%.16llx\n", zone_names[i], i,
71 reg_zone->base_pfn, reg_zone->va_size_pages);
72 }
73 }
74
75 kbase_gpu_vm_unlock(kctx);
76 return 0;
77 }
78
79 /*
80 * File operations related to debugfs entry for mem_zones
81 */
debug_mem_zones_open(struct inode * in,struct file * file)82 static int debug_mem_zones_open(struct inode *in, struct file *file)
83 {
84 return single_open(file, debug_mem_zones_show, in->i_private);
85 }
86
87 static const struct file_operations kbase_debug_mem_zones_fops = {
88 .owner = THIS_MODULE,
89 .open = debug_mem_zones_open,
90 .read = seq_read,
91 .llseek = seq_lseek,
92 .release = single_release,
93 };
94
95 /*
96 * Initialize debugfs entry for mem_zones
97 */
kbase_debug_mem_zones_init(struct kbase_context * const kctx)98 void kbase_debug_mem_zones_init(struct kbase_context *const kctx)
99 {
100 /* Caller already ensures this, but we keep the pattern for
101 * maintenance safety.
102 */
103 if (WARN_ON(!kctx) || WARN_ON(IS_ERR_OR_NULL(kctx->kctx_dentry)))
104 return;
105
106 debugfs_create_file("mem_zones", 0400, kctx->kctx_dentry, kctx,
107 &kbase_debug_mem_zones_fops);
108 }
109 #else
110 /*
111 * Stub functions for when debugfs is disabled
112 */
kbase_debug_mem_zones_init(struct kbase_context * const kctx)113 void kbase_debug_mem_zones_init(struct kbase_context *const kctx)
114 {
115 }
116 #endif
117