From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/drivers/firmware/tegra/bpmp-debugfs.c | 505 ++++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 418 insertions(+), 87 deletions(-)
diff --git a/kernel/drivers/firmware/tegra/bpmp-debugfs.c b/kernel/drivers/firmware/tegra/bpmp-debugfs.c
index f7f6a0a..fbc0d66 100644
--- a/kernel/drivers/firmware/tegra/bpmp-debugfs.c
+++ b/kernel/drivers/firmware/tegra/bpmp-debugfs.c
@@ -1,22 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
- *
*/
#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
+#include <linux/slab.h>
#include <linux/uaccess.h>
#include <soc/tegra/bpmp.h>
#include <soc/tegra/bpmp-abi.h>
+
+static DEFINE_MUTEX(bpmp_debug_lock);
struct seqbuf {
char *buf;
@@ -80,29 +74,382 @@
static const char *get_filename(struct tegra_bpmp *bpmp,
const struct file *file, char *buf, int size)
{
- char root_path_buf[512];
- const char *root_path;
- const char *filename;
+ const char *root_path, *filename = NULL;
+ char *root_path_buf;
size_t root_len;
+ size_t root_path_buf_len = 512;
+
+ root_path_buf = kzalloc(root_path_buf_len, GFP_KERNEL);
+ if (!root_path_buf)
+ goto out;
root_path = dentry_path(bpmp->debugfs_mirror, root_path_buf,
- sizeof(root_path_buf));
+ root_path_buf_len);
if (IS_ERR(root_path))
- return NULL;
+ goto out;
root_len = strlen(root_path);
filename = dentry_path(file->f_path.dentry, buf, size);
- if (IS_ERR(filename))
- return NULL;
+ if (IS_ERR(filename)) {
+ filename = NULL;
+ goto out;
+ }
- if (strlen(filename) < root_len ||
- strncmp(filename, root_path, root_len))
- return NULL;
+ if (strlen(filename) < root_len || strncmp(filename, root_path, root_len)) {
+ filename = NULL;
+ goto out;
+ }
filename += root_len;
+out:
+ kfree(root_path_buf);
return filename;
+}
+
+static int mrq_debug_open(struct tegra_bpmp *bpmp, const char *name,
+ uint32_t *fd, uint32_t *len, bool write)
+{
+ struct mrq_debug_request req = {
+ .cmd = cpu_to_le32(write ? CMD_DEBUG_OPEN_WO : CMD_DEBUG_OPEN_RO),
+ };
+ struct mrq_debug_response resp;
+ struct tegra_bpmp_message msg = {
+ .mrq = MRQ_DEBUG,
+ .tx = {
+ .data = &req,
+ .size = sizeof(req),
+ },
+ .rx = {
+ .data = &resp,
+ .size = sizeof(resp),
+ },
+ };
+ ssize_t sz_name;
+ int err = 0;
+
+ sz_name = strscpy(req.fop.name, name, sizeof(req.fop.name));
+ if (sz_name < 0) {
+ pr_err("File name too large: %s\n", name);
+ return -EINVAL;
+ }
+
+ err = tegra_bpmp_transfer(bpmp, &msg);
+ if (err < 0)
+ return err;
+ else if (msg.rx.ret < 0)
+ return -EINVAL;
+
+ *len = resp.fop.datalen;
+ *fd = resp.fop.fd;
+
+ return 0;
+}
+
+static int mrq_debug_close(struct tegra_bpmp *bpmp, uint32_t fd)
+{
+ struct mrq_debug_request req = {
+ .cmd = cpu_to_le32(CMD_DEBUG_CLOSE),
+ .frd = {
+ .fd = fd,
+ },
+ };
+ struct mrq_debug_response resp;
+ struct tegra_bpmp_message msg = {
+ .mrq = MRQ_DEBUG,
+ .tx = {
+ .data = &req,
+ .size = sizeof(req),
+ },
+ .rx = {
+ .data = &resp,
+ .size = sizeof(resp),
+ },
+ };
+ int err = 0;
+
+ err = tegra_bpmp_transfer(bpmp, &msg);
+ if (err < 0)
+ return err;
+ else if (msg.rx.ret < 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int mrq_debug_read(struct tegra_bpmp *bpmp, const char *name,
+ char *data, size_t sz_data, uint32_t *nbytes)
+{
+ struct mrq_debug_request req = {
+ .cmd = cpu_to_le32(CMD_DEBUG_READ),
+ };
+ struct mrq_debug_response resp;
+ struct tegra_bpmp_message msg = {
+ .mrq = MRQ_DEBUG,
+ .tx = {
+ .data = &req,
+ .size = sizeof(req),
+ },
+ .rx = {
+ .data = &resp,
+ .size = sizeof(resp),
+ },
+ };
+ uint32_t fd = 0, len = 0;
+ int remaining, err;
+
+ mutex_lock(&bpmp_debug_lock);
+ err = mrq_debug_open(bpmp, name, &fd, &len, 0);
+ if (err)
+ goto out;
+
+ if (len > sz_data) {
+ err = -EFBIG;
+ goto close;
+ }
+
+ req.frd.fd = fd;
+ remaining = len;
+
+ while (remaining > 0) {
+ err = tegra_bpmp_transfer(bpmp, &msg);
+ if (err < 0) {
+ goto close;
+ } else if (msg.rx.ret < 0) {
+ err = -EINVAL;
+ goto close;
+ }
+
+ if (resp.frd.readlen > remaining) {
+ pr_err("%s: read data length invalid\n", __func__);
+ err = -EINVAL;
+ goto close;
+ }
+
+ memcpy(data, resp.frd.data, resp.frd.readlen);
+ data += resp.frd.readlen;
+ remaining -= resp.frd.readlen;
+ }
+
+ *nbytes = len;
+
+close:
+ err = mrq_debug_close(bpmp, fd);
+out:
+ mutex_unlock(&bpmp_debug_lock);
+ return err;
+}
+
+static int mrq_debug_write(struct tegra_bpmp *bpmp, const char *name,
+ uint8_t *data, size_t sz_data)
+{
+ struct mrq_debug_request req = {
+ .cmd = cpu_to_le32(CMD_DEBUG_WRITE)
+ };
+ struct mrq_debug_response resp;
+ struct tegra_bpmp_message msg = {
+ .mrq = MRQ_DEBUG,
+ .tx = {
+ .data = &req,
+ .size = sizeof(req),
+ },
+ .rx = {
+ .data = &resp,
+ .size = sizeof(resp),
+ },
+ };
+ uint32_t fd = 0, len = 0;
+ size_t remaining;
+ int err;
+
+ mutex_lock(&bpmp_debug_lock);
+ err = mrq_debug_open(bpmp, name, &fd, &len, 1);
+ if (err)
+ goto out;
+
+ if (sz_data > len) {
+ err = -EINVAL;
+ goto close;
+ }
+
+ req.fwr.fd = fd;
+ remaining = sz_data;
+
+ while (remaining > 0) {
+ len = min(remaining, sizeof(req.fwr.data));
+ memcpy(req.fwr.data, data, len);
+ req.fwr.datalen = len;
+
+ err = tegra_bpmp_transfer(bpmp, &msg);
+ if (err < 0) {
+ goto close;
+ } else if (msg.rx.ret < 0) {
+ err = -EINVAL;
+ goto close;
+ }
+
+ data += req.fwr.datalen;
+ remaining -= req.fwr.datalen;
+ }
+
+close:
+ err = mrq_debug_close(bpmp, fd);
+out:
+ mutex_unlock(&bpmp_debug_lock);
+ return err;
+}
+
+static int bpmp_debug_show(struct seq_file *m, void *p)
+{
+ struct file *file = m->private;
+ struct inode *inode = file_inode(file);
+ struct tegra_bpmp *bpmp = inode->i_private;
+ char *databuf = NULL;
+ char fnamebuf[256];
+ const char *filename;
+ uint32_t nbytes = 0;
+ size_t len;
+ int err;
+
+ len = seq_get_buf(m, &databuf);
+ if (!databuf)
+ return -ENOMEM;
+
+ filename = get_filename(bpmp, file, fnamebuf, sizeof(fnamebuf));
+ if (!filename)
+ return -ENOENT;
+
+ err = mrq_debug_read(bpmp, filename, databuf, len, &nbytes);
+ if (!err)
+ seq_commit(m, nbytes);
+
+ return err;
+}
+
+static ssize_t bpmp_debug_store(struct file *file, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct inode *inode = file_inode(file);
+ struct tegra_bpmp *bpmp = inode->i_private;
+ char *databuf = NULL;
+ char fnamebuf[256];
+ const char *filename;
+ ssize_t err;
+
+ filename = get_filename(bpmp, file, fnamebuf, sizeof(fnamebuf));
+ if (!filename)
+ return -ENOENT;
+
+ databuf = kmalloc(count, GFP_KERNEL);
+ if (!databuf)
+ return -ENOMEM;
+
+ if (copy_from_user(databuf, buf, count)) {
+ err = -EFAULT;
+ goto free_ret;
+ }
+
+ err = mrq_debug_write(bpmp, filename, databuf, count);
+
+free_ret:
+ kfree(databuf);
+
+ return err ?: count;
+}
+
+static int bpmp_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open_size(file, bpmp_debug_show, file, SZ_256K);
+}
+
+static const struct file_operations bpmp_debug_fops = {
+ .open = bpmp_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = bpmp_debug_store,
+ .release = single_release,
+};
+
+static int bpmp_populate_debugfs_inband(struct tegra_bpmp *bpmp,
+ struct dentry *parent,
+ char *ppath)
+{
+ const size_t pathlen = SZ_256;
+ const size_t bufsize = SZ_16K;
+ uint32_t dsize, attrs = 0;
+ struct dentry *dentry;
+ struct seqbuf seqbuf;
+ char *buf, *pathbuf;
+ const char *name;
+ int err = 0;
+
+ if (!bpmp || !parent || !ppath)
+ return -EINVAL;
+
+ buf = kmalloc(bufsize, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pathbuf = kzalloc(pathlen, GFP_KERNEL);
+ if (!pathbuf) {
+ kfree(buf);
+ return -ENOMEM;
+ }
+
+ err = mrq_debug_read(bpmp, ppath, buf, bufsize, &dsize);
+ if (err)
+ goto out;
+
+ seqbuf_init(&seqbuf, buf, dsize);
+
+ while (!seqbuf_eof(&seqbuf)) {
+ err = seqbuf_read_u32(&seqbuf, &attrs);
+ if (err)
+ goto out;
+
+ err = seqbuf_read_str(&seqbuf, &name);
+ if (err < 0)
+ goto out;
+
+ if (attrs & DEBUGFS_S_ISDIR) {
+ size_t len;
+
+ dentry = debugfs_create_dir(name, parent);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ goto out;
+ }
+
+ len = snprintf(pathbuf, pathlen, "%s%s/", ppath, name);
+ if (len >= pathlen) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = bpmp_populate_debugfs_inband(bpmp, dentry,
+ pathbuf);
+ if (err < 0)
+ goto out;
+ } else {
+ umode_t mode;
+
+ mode = attrs & DEBUGFS_S_IRUSR ? 0400 : 0;
+ mode |= attrs & DEBUGFS_S_IWUSR ? 0200 : 0;
+ dentry = debugfs_create_file(name, mode, parent, bpmp,
+ &bpmp_debug_fops);
+ if (IS_ERR(dentry)) {
+ err = -ENOMEM;
+ goto out;
+ }
+ }
+ }
+
+out:
+ kfree(pathbuf);
+ kfree(buf);
+
+ return err;
}
static int mrq_debugfs_read(struct tegra_bpmp *bpmp,
@@ -136,6 +483,8 @@
err = tegra_bpmp_transfer(bpmp, &msg);
if (err < 0)
return err;
+ else if (msg.rx.ret < 0)
+ return -EINVAL;
*nbytes = (size_t)resp.fop.nbytes;
@@ -193,6 +542,8 @@
err = tegra_bpmp_transfer(bpmp, &msg);
if (err < 0)
return err;
+ else if (msg.rx.ret < 0)
+ return -EINVAL;
*nbytes = (size_t)resp.dumpdir.nbytes;
@@ -211,7 +562,7 @@
char buf[256];
const char *filename;
size_t len, nbytes;
- int ret;
+ int err;
filename = get_filename(bpmp, file, buf, sizeof(buf));
if (!filename)
@@ -225,24 +576,24 @@
datavirt = dma_alloc_coherent(bpmp->dev, datasize, &dataphys,
GFP_KERNEL | GFP_DMA32);
if (!datavirt) {
- ret = -ENOMEM;
+ err = -ENOMEM;
goto free_namebuf;
}
len = strlen(filename);
strncpy(namevirt, filename, namesize);
- ret = mrq_debugfs_read(bpmp, namephys, len, dataphys, datasize,
+ err = mrq_debugfs_read(bpmp, namephys, len, dataphys, datasize,
&nbytes);
- if (!ret)
+ if (!err)
seq_write(m, datavirt, nbytes);
dma_free_coherent(bpmp->dev, datasize, datavirt, dataphys);
free_namebuf:
dma_free_coherent(bpmp->dev, namesize, namevirt, namephys);
- return ret;
+ return err;
}
static int debugfs_open(struct inode *inode, struct file *file)
@@ -262,7 +613,7 @@
char fnamebuf[256];
const char *filename;
size_t len;
- int ret;
+ int err;
filename = get_filename(bpmp, file, fnamebuf, sizeof(fnamebuf));
if (!filename)
@@ -276,7 +627,7 @@
datavirt = dma_alloc_coherent(bpmp->dev, datasize, &dataphys,
GFP_KERNEL | GFP_DMA32);
if (!datavirt) {
- ret = -ENOMEM;
+ err = -ENOMEM;
goto free_namebuf;
}
@@ -284,11 +635,11 @@
strncpy(namevirt, filename, namesize);
if (copy_from_user(datavirt, buf, count)) {
- ret = -EFAULT;
+ err = -EFAULT;
goto free_databuf;
}
- ret = mrq_debugfs_write(bpmp, namephys, len, dataphys,
+ err = mrq_debugfs_write(bpmp, namephys, len, dataphys,
count);
free_databuf:
@@ -296,7 +647,7 @@
free_namebuf:
dma_free_coherent(bpmp->dev, namesize, namevirt, namephys);
- return ret ?: count;
+ return err ?: count;
}
static const struct file_operations debugfs_fops = {
@@ -338,7 +689,7 @@
if (t & DEBUGFS_S_ISDIR) {
dentry = debugfs_create_dir(name, parent);
- if (!dentry)
+ if (IS_ERR(dentry))
return -ENOMEM;
err = bpmp_populate_dir(bpmp, seqbuf, dentry, depth+1);
if (err < 0)
@@ -351,7 +702,7 @@
dentry = debugfs_create_file(name, mode,
parent, bpmp,
&debugfs_fops);
- if (!dentry)
+ if (IS_ERR(dentry))
return -ENOMEM;
}
}
@@ -359,86 +710,66 @@
return 0;
}
-static int create_debugfs_mirror(struct tegra_bpmp *bpmp, void *buf,
- size_t bufsize, struct dentry *root)
+static int bpmp_populate_debugfs_shmem(struct tegra_bpmp *bpmp)
{
struct seqbuf seqbuf;
+ const size_t sz = SZ_512K;
+ dma_addr_t phys;
+ size_t nbytes;
+ void *virt;
int err;
- bpmp->debugfs_mirror = debugfs_create_dir("debug", root);
- if (!bpmp->debugfs_mirror)
+ virt = dma_alloc_coherent(bpmp->dev, sz, &phys,
+ GFP_KERNEL | GFP_DMA32);
+ if (!virt)
return -ENOMEM;
- seqbuf_init(&seqbuf, buf, bufsize);
- err = bpmp_populate_dir(bpmp, &seqbuf, bpmp->debugfs_mirror, 0);
+ err = mrq_debugfs_dumpdir(bpmp, phys, sz, &nbytes);
if (err < 0) {
- debugfs_remove_recursive(bpmp->debugfs_mirror);
- bpmp->debugfs_mirror = NULL;
+ goto free;
+ } else if (nbytes > sz) {
+ err = -EINVAL;
+ goto free;
}
+
+ seqbuf_init(&seqbuf, virt, nbytes);
+ err = bpmp_populate_dir(bpmp, &seqbuf, bpmp->debugfs_mirror, 0);
+free:
+ dma_free_coherent(bpmp->dev, sz, virt, phys);
return err;
}
-static int mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq)
-{
- struct mrq_query_abi_request req = { .mrq = cpu_to_le32(mrq) };
- struct mrq_query_abi_response resp;
- struct tegra_bpmp_message msg = {
- .mrq = MRQ_QUERY_ABI,
- .tx = {
- .data = &req,
- .size = sizeof(req),
- },
- .rx = {
- .data = &resp,
- .size = sizeof(resp),
- },
- };
- int ret;
-
- ret = tegra_bpmp_transfer(bpmp, &msg);
- if (ret < 0) {
- /* something went wrong; assume not supported */
- dev_warn(bpmp->dev, "tegra_bpmp_transfer failed (%d)\n", ret);
- return 0;
- }
-
- return resp.status ? 0 : 1;
-}
-
int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
{
- dma_addr_t phys;
- void *virt;
- const size_t sz = SZ_256K;
- size_t nbytes;
- int ret;
struct dentry *root;
+ bool inband;
+ int err;
- if (!mrq_is_supported(bpmp, MRQ_DEBUGFS))
+ inband = tegra_bpmp_mrq_is_supported(bpmp, MRQ_DEBUG);
+
+ if (!inband && !tegra_bpmp_mrq_is_supported(bpmp, MRQ_DEBUGFS))
return 0;
root = debugfs_create_dir("bpmp", NULL);
- if (!root)
+ if (IS_ERR(root))
return -ENOMEM;
- virt = dma_alloc_coherent(bpmp->dev, sz, &phys,
- GFP_KERNEL | GFP_DMA32);
- if (!virt) {
- ret = -ENOMEM;
+ bpmp->debugfs_mirror = debugfs_create_dir("debug", root);
+ if (IS_ERR(bpmp->debugfs_mirror)) {
+ err = -ENOMEM;
goto out;
}
- ret = mrq_debugfs_dumpdir(bpmp, phys, sz, &nbytes);
- if (ret < 0)
- goto free;
+ if (inband)
+ err = bpmp_populate_debugfs_inband(bpmp, bpmp->debugfs_mirror,
+ "/");
+ else
+ err = bpmp_populate_debugfs_shmem(bpmp);
- ret = create_debugfs_mirror(bpmp, virt, nbytes, root);
-free:
- dma_free_coherent(bpmp->dev, sz, virt, phys);
out:
- if (ret < 0)
- debugfs_remove(root);
+ if (err < 0)
+ debugfs_remove_recursive(root);
- return ret;
+ return err;
}
--
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