mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 04:18:39 +08:00
46c6685e7e
Modules registering driver with coreboot_driver_register() might
forget to set .owner field. The field is used by some of other kernel
parts for reference counting (try_module_get()), so it is expected that
drivers will set it.
Solve the problem by moving this task away from the drivers to the core
code, just like we did for platform_driver in
commit 9447057eaf ("platform_device: use a macro instead of
platform_driver_register").
Moving the .owner setting code to the core this effectively fixes
missing .owner in framebuffer-coreboot, memconsole-coreboot and vpd
drivers.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240330-module-owner-coreboot-v1-1-ddba098b6dcf@linaro.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* coreboot_table.h
|
|
*
|
|
* Internal header for coreboot table access.
|
|
*
|
|
* Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
|
|
* Copyright 2017 Google Inc.
|
|
* Copyright 2017 Samuel Holland <samuel@sholland.org>
|
|
*/
|
|
|
|
#ifndef __COREBOOT_TABLE_H
|
|
#define __COREBOOT_TABLE_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
/* Coreboot table header structure */
|
|
struct coreboot_table_header {
|
|
char signature[4];
|
|
u32 header_bytes;
|
|
u32 header_checksum;
|
|
u32 table_bytes;
|
|
u32 table_checksum;
|
|
u32 table_entries;
|
|
};
|
|
|
|
/* List of coreboot entry structures that is used */
|
|
/* Generic */
|
|
struct coreboot_table_entry {
|
|
u32 tag;
|
|
u32 size;
|
|
};
|
|
|
|
/* Points to a CBMEM entry */
|
|
struct lb_cbmem_ref {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
u64 cbmem_addr;
|
|
};
|
|
|
|
#define LB_TAG_CBMEM_ENTRY 0x31
|
|
|
|
/* Corresponds to LB_TAG_CBMEM_ENTRY */
|
|
struct lb_cbmem_entry {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
u64 address;
|
|
u32 entry_size;
|
|
u32 id;
|
|
};
|
|
|
|
/* Describes framebuffer setup by coreboot */
|
|
struct lb_framebuffer {
|
|
u32 tag;
|
|
u32 size;
|
|
|
|
u64 physical_address;
|
|
u32 x_resolution;
|
|
u32 y_resolution;
|
|
u32 bytes_per_line;
|
|
u8 bits_per_pixel;
|
|
u8 red_mask_pos;
|
|
u8 red_mask_size;
|
|
u8 green_mask_pos;
|
|
u8 green_mask_size;
|
|
u8 blue_mask_pos;
|
|
u8 blue_mask_size;
|
|
u8 reserved_mask_pos;
|
|
u8 reserved_mask_size;
|
|
};
|
|
|
|
/* A device, additionally with information from coreboot. */
|
|
struct coreboot_device {
|
|
struct device dev;
|
|
union {
|
|
struct coreboot_table_entry entry;
|
|
struct lb_cbmem_ref cbmem_ref;
|
|
struct lb_cbmem_entry cbmem_entry;
|
|
struct lb_framebuffer framebuffer;
|
|
DECLARE_FLEX_ARRAY(u8, raw);
|
|
};
|
|
};
|
|
|
|
static inline struct coreboot_device *dev_to_coreboot_device(struct device *dev)
|
|
{
|
|
return container_of(dev, struct coreboot_device, dev);
|
|
}
|
|
|
|
/* A driver for handling devices described in coreboot tables. */
|
|
struct coreboot_driver {
|
|
int (*probe)(struct coreboot_device *);
|
|
void (*remove)(struct coreboot_device *);
|
|
struct device_driver drv;
|
|
const struct coreboot_device_id *id_table;
|
|
};
|
|
|
|
/* use a macro to avoid include chaining to get THIS_MODULE */
|
|
#define coreboot_driver_register(driver) \
|
|
__coreboot_driver_register(driver, THIS_MODULE)
|
|
/* Register a driver that uses the data from a coreboot table. */
|
|
int __coreboot_driver_register(struct coreboot_driver *driver,
|
|
struct module *owner);
|
|
|
|
/* Unregister a driver that uses the data from a coreboot table. */
|
|
void coreboot_driver_unregister(struct coreboot_driver *driver);
|
|
|
|
/* module_coreboot_driver() - Helper macro for drivers that don't do
|
|
* anything special in module init/exit. This eliminates a lot of
|
|
* boilerplate. Each module may only use this macro once, and
|
|
* calling it replaces module_init() and module_exit()
|
|
*/
|
|
#define module_coreboot_driver(__coreboot_driver) \
|
|
module_driver(__coreboot_driver, coreboot_driver_register, \
|
|
coreboot_driver_unregister)
|
|
|
|
#endif /* __COREBOOT_TABLE_H */
|