threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* Copyright (C) 2015 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include <linux/poll.h>
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#include <linux/types.h>
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#include <asm/cacheflush.h>
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#include <mt-plat/mtk_ccci_common.h>
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#include "ccci_util_sib.h"
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#include "ccci_util_log.h"
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static struct ccci_sib_region ccci_sib;
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static ssize_t ccci_sib_read(struct file *file, char __user *buf,
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size_t size, loff_t *ppos)
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{
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unsigned int *read_ptr;
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unsigned int read_pos, read_len, available;
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read_ptr = file->private_data;
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read_pos = *read_ptr;
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available = ccci_sib.size - read_pos;
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read_len = size < available ? size : available;
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if (read_len == 0)
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return 0;
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__inval_dcache_area(ccci_sib.base_ap_view_vir + read_pos, read_len);
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if (copy_to_user(buf,
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ccci_sib.base_ap_view_vir + read_pos,
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read_len)) {
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pr_err("[ccci0/util]ccci_sib: copy_to_user fail\n");
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return -EFAULT;
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}
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*read_ptr = read_pos + read_len;
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return read_len;
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}
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unsigned int ccci_sib_poll(struct file *fp, struct poll_table_struct *poll)
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{
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unsigned int *read_ptr;
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unsigned int read_pos;
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read_ptr = fp->private_data;
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read_pos = *read_ptr;
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if (ccci_sib.size == read_pos)
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return 0;
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return POLLIN | POLLRDNORM;
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}
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static int ccci_sib_open(struct inode *inode, struct file *file)
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{
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unsigned int *read_ptr;
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read_ptr = kzalloc(sizeof(unsigned int), GFP_KERNEL);
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if (read_ptr == NULL)
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return -1;
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file->private_data = read_ptr;
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return 0;
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}
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static int ccci_sib_close(struct inode *inode, struct file *file)
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{
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unsigned int *read_ptr;
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read_ptr = file->private_data;
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kfree(read_ptr);
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return 0;
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}
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static const struct file_operations ccci_sib_fops = {
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.read = ccci_sib_read,
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.open = ccci_sib_open,
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.release = ccci_sib_close,
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.poll = ccci_sib_poll,
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};
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static void ccci_sib_smem_remap(void)
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{
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phys_addr_t md_sib_mem_addr;
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unsigned int md_sib_mem_size;
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get_md_sib_mem_info(&md_sib_mem_addr, &md_sib_mem_size);
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ccci_sib.base_ap_view_phy = md_sib_mem_addr;
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ccci_sib.size = md_sib_mem_size;
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ccci_sib.base_ap_view_vir =
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ccci_map_phy_addr(md_sib_mem_addr, md_sib_mem_size);
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ccci_sib.base_md_view_phy = 0;
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pr_debug(
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"[ccci0/util]md sib mem info: (0x%llx 0x%llx %p %d)\n",
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(unsigned long long)ccci_sib.base_ap_view_phy,
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(unsigned long long)ccci_sib.base_md_view_phy,
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ccci_sib.base_ap_view_vir,
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ccci_sib.size);
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}
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void ccci_sib_init(void)
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{
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struct proc_dir_entry *ccci_sib_proc;
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ccci_sib_proc = proc_create("ccci_sib", 0440, NULL, &ccci_sib_fops);
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if (ccci_sib_proc == NULL) {
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pr_err("[ccci0/util]fail to create proc entry for sib dump\n");
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return;
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}
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ccci_sib_smem_remap();
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}
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