| // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note |
| /* |
| * |
| * (C) COPYRIGHT 2022 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU license. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| /* |
| * Debugfs interface to dump information about GPU_VA memory zones |
| */ |
| |
| #include "mali_kbase_debug_mem_zones.h" |
| #include "mali_kbase.h" |
| |
| #include <linux/list.h> |
| #include <linux/file.h> |
| |
| #if IS_ENABLED(CONFIG_DEBUG_FS) |
| |
| /** |
| * debug_mem_zones_show - Show information about GPU_VA memory zones |
| * @sfile: The debugfs entry |
| * @data: Data associated with the entry |
| * |
| * This function is called to get the contents of the @c mem_zones debugfs file. |
| * This lists the start address and size (in pages) of each initialized memory |
| * zone within GPU_VA memory. |
| * |
| * Return: |
| * 0 if successfully prints data in debugfs entry file |
| * -1 if it encountered an error |
| */ |
| static int debug_mem_zones_show(struct seq_file *sfile, void *data) |
| { |
| struct kbase_context *const kctx = sfile->private; |
| size_t i; |
| |
| const char *zone_names[KBASE_REG_ZONE_MAX] = { |
| "SAME_VA", |
| "CUSTOM_VA", |
| "EXEC_VA" |
| #if MALI_USE_CSF |
| , |
| "MCU_SHARED_VA", |
| "EXEC_FIXED_VA", |
| "FIXED_VA" |
| #endif |
| }; |
| |
| kbase_gpu_vm_lock(kctx); |
| |
| for (i = 0; i < KBASE_REG_ZONE_MAX; i++) { |
| struct kbase_reg_zone *reg_zone = &kctx->reg_zone[i]; |
| |
| if (reg_zone->base_pfn) { |
| seq_printf(sfile, "%15s %zu 0x%.16llx 0x%.16llx\n", zone_names[i], i, |
| reg_zone->base_pfn, reg_zone->va_size_pages); |
| } |
| } |
| |
| kbase_gpu_vm_unlock(kctx); |
| return 0; |
| } |
| |
| /* |
| * File operations related to debugfs entry for mem_zones |
| */ |
| static int debug_mem_zones_open(struct inode *in, struct file *file) |
| { |
| return single_open(file, debug_mem_zones_show, in->i_private); |
| } |
| |
| static const struct file_operations kbase_debug_mem_zones_fops = { |
| .owner = THIS_MODULE, |
| .open = debug_mem_zones_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| /* |
| * Initialize debugfs entry for mem_zones |
| */ |
| void kbase_debug_mem_zones_init(struct kbase_context *const kctx) |
| { |
| /* Caller already ensures this, but we keep the pattern for |
| * maintenance safety. |
| */ |
| if (WARN_ON(!kctx) || WARN_ON(IS_ERR_OR_NULL(kctx->kctx_dentry))) |
| return; |
| |
| debugfs_create_file("mem_zones", 0400, kctx->kctx_dentry, kctx, |
| &kbase_debug_mem_zones_fops); |
| } |
| #else |
| /* |
| * Stub functions for when debugfs is disabled |
| */ |
| void kbase_debug_mem_zones_init(struct kbase_context *const kctx) |
| { |
| } |
| #endif |