linuxmsm/hexagonrpc
0
0
Fork 0
mirror of https://github.com/linux-msm/hexagonrpc.git synced 2026-02-25 13:13:52 -08:00
Code Issues Packages Projects Releases Wiki Activity

fastrpc: hexagonfs: mapped: add sysfs variant with fixed size

Browse Source 
The remote processor expects a non-zero size for sysfs files, but the
mainline kernel sets the real file's size to zero. Add a variant of the
mapped file type that fixes up the size.
This commit is contained in:
Richard Acayan
2023-02-03 19:00:34 -05:00
parent 3248d6bfd8
commit aadf2e3e09
3 changed files with 49 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
fastrpc/hexagonrpcd/hexagonfs.c
View File

@@ -45,11 +45,11 @@
.u.phys = path, \
}
#define DEFINE_SYSFILE(dirname, func) \
(struct hexagonfs_dirent) { \
.name = dirname, \
.ops = &hexagonfs_sysfs_ops, \
.u.func = func, \
#define DEFINE_SYSFILE(dirname, path) \
(struct hexagonfs_dirent) { \
.name = dirname, \
.ops = &hexagonfs_mapped_sysfs_ops, \
.u.phys = path, \
}
static struct hexagonfs_dirent root_dir = DEFINE_VIRT_DIR("/",
@@ -70,21 +70,21 @@ static struct hexagonfs_dirent root_dir = DEFINE_VIRT_DIR("/",
&DEFINE_VIRT_DIR("sys",
&DEFINE_VIRT_DIR("devices",
&DEFINE_VIRT_DIR("soc0",
&DEFINE_MAPPED("hw_platform",
"/sys/kernel/debug/qcom_socinfo/hardware_platform"),
&DEFINE_SYSFILE("hw_platform",
"/sys/kernel/debug/qcom_socinfo/hardware_platform"),
&(struct hexagonfs_dirent) {
.name = "platform_subtype",
.ops = &hexagonfs_plat_subtype_name_ops,
.u.phys = "/sys/kernel/debug/qcom_socinfo/hardware_platform_subtype",
},
&DEFINE_MAPPED("platform_subtype_id",
"/sys/kernel/debug/qcom_socinfo/hardware_platform_subtype"),
&DEFINE_MAPPED("platform_version",
"/sys/kernel/debug/qcom_socinfo/platform_version"),
&DEFINE_MAPPED("revision",
"/sys/devices/soc0/revision"),
&DEFINE_MAPPED("soc_id",
"/sys/devices/soc0/soc_id"),
&DEFINE_SYSFILE("platform_subtype_id",
"/sys/kernel/debug/qcom_socinfo/hardware_platform_subtype"),
&DEFINE_SYSFILE("platform_version",
"/sys/kernel/debug/qcom_socinfo/platform_version"),
&DEFINE_SYSFILE("revision",
"/sys/devices/soc0/revision"),
&DEFINE_SYSFILE("soc_id",
"/sys/devices/soc0/soc_id"),
NULL,
),
NULL,

1
fastrpc/hexagonrpcd/hexagonfs.h
View File

@@ -63,6 +63,7 @@ struct hexagonfs_fd {
};
extern struct hexagonfs_file_ops hexagonfs_mapped_ops;
extern struct hexagonfs_file_ops hexagonfs_mapped_sysfs_ops;
extern struct hexagonfs_file_ops hexagonfs_plat_subtype_name_ops;
extern struct hexagonfs_file_ops hexagonfs_virt_dir_ops;

33
fastrpc/hexagonrpcd/hexagonfs_mapped.c
View File

@@ -216,6 +216,29 @@ static int mapped_stat(struct hexagonfs_fd *fd, struct stat *stats)
return 0;
}
/*
* This is the sysfs variant of the stat function.
*
* The remote processor expects a non-zero size if the file is not empty, even
* if a size cannot be determined without reading. The size is 256 on
* downstream kernels, so set it to that.
*
* Otherwise, the existing stat() function can be used.
*/
static int mapped_sysfs_stat(struct hexagonfs_fd *fd, struct stat *stats)
{
int ret;
ret = mapped_stat(fd, stats);
if (ret)
return ret;
if (!(stats->st_mode & S_IFDIR))
stats->st_size = 256;
return 0;
}
struct hexagonfs_file_ops hexagonfs_mapped_ops = {
.close = mapped_close,
.from_dirent = mapped_from_dirent,
@@ -225,3 +248,13 @@ struct hexagonfs_file_ops hexagonfs_mapped_ops = {
.seek = mapped_seek,
.stat = mapped_stat,
};
struct hexagonfs_file_ops hexagonfs_mapped_sysfs_ops = {
.close = mapped_close,
.from_dirent = mapped_from_dirent,
.openat = mapped_openat,
.read = mapped_read,
.readdir = mapped_readdir,
.seek = mapped_seek,
.stat = mapped_sysfs_stat,
};