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// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2022-2023 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 allocations in kctx
*/
#include "mali_kbase_debug_mem_allocs.h"
#include "mali_kbase.h"
#include <linux/string.h>
#include <linux/list.h>
#include <linux/file.h>
#if IS_ENABLED(CONFIG_DEBUG_FS)
/**
* debug_zone_mem_allocs_show - Show information from specific rbtree
* @zone: The memory zone to be displayed
* @sfile: The debugfs entry
*
* This function is called to show information about all the GPU allocations of a
* a particular zone within GPU virtual memory space of a context.
* The information like the start virtual address and size (in bytes) is shown for
* every GPU allocation mapped in the zone.
*/
static void debug_zone_mem_allocs_show(struct kbase_reg_zone *zone, struct seq_file *sfile)
{
struct rb_node *p;
struct rb_root *rbtree = &zone->reg_rbtree;
struct kbase_va_region *reg;
const char *type_names[5] = {
"Native",
"Imported UMM",
"Imported user buf",
"Alias",
"Raw"
};
#define MEM_ALLOCS_HEADER \
" VA, VA size, Commit size, Flags, Mem type\n"
seq_printf(sfile, "Zone name: %s\n:", kbase_reg_zone_get_name(zone->id));
seq_printf(sfile, MEM_ALLOCS_HEADER);
for (p = rb_first(rbtree); p; p = rb_next(p)) {
reg = rb_entry(p, struct kbase_va_region, rblink);
if (!(reg->flags & KBASE_REG_FREE)) {
seq_printf(sfile, "%16llx, %16zx, %16zx, %8lx, %s\n",
reg->start_pfn << PAGE_SHIFT, reg->nr_pages << PAGE_SHIFT,
kbase_reg_current_backed_size(reg) << PAGE_SHIFT,
reg->flags, type_names[reg->gpu_alloc->type]);
}
}
}
/**
* debug_ctx_mem_allocs_show - Show information about GPU allocations in a kctx
* @sfile: The debugfs entry
* @data: Data associated with the entry
*
* Return:
* 0 if successfully prints data in debugfs entry file
* -1 if it encountered an error
*/
static int debug_ctx_mem_allocs_show(struct seq_file *sfile, void *data)
{
struct kbase_context *const kctx = sfile->private;
enum kbase_memory_zone zone_idx;
kbase_gpu_vm_lock(kctx);
for (zone_idx = 0; zone_idx < CONTEXT_ZONE_MAX; zone_idx++) {
struct kbase_reg_zone *zone;
zone = &kctx->reg_zone[zone_idx];
debug_zone_mem_allocs_show(zone, sfile);
}
kbase_gpu_vm_unlock(kctx);
return 0;
}
/*
* File operations related to debugfs entry for mem_zones
*/
static int debug_mem_allocs_open(struct inode *in, struct file *file)
{
return single_open(file, debug_ctx_mem_allocs_show, in->i_private);
}
static const struct file_operations kbase_debug_mem_allocs_fops = {
.owner = THIS_MODULE,
.open = debug_mem_allocs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/*
* Initialize debugfs entry for mem_allocs
*/
void kbase_debug_mem_allocs_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_allocs", 0400, kctx->kctx_dentry, kctx,
&kbase_debug_mem_allocs_fops);
}
#else
/*
* Stub functions for when debugfs is disabled
*/
void kbase_debug_mem_allocs_init(struct kbase_context *const kctx)
{
}
#endif
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