diff options
Diffstat (limited to 'drivers/firmware/google/coreboot_table.h')
| -rw-r--r-- | drivers/firmware/google/coreboot_table.h | 51 |
1 files changed, 38 insertions, 13 deletions
diff --git a/drivers/firmware/google/coreboot_table.h b/drivers/firmware/google/coreboot_table.h index 71a9de6b15fa..bb6f0f7299b4 100644 --- a/drivers/firmware/google/coreboot_table.h +++ b/drivers/firmware/google/coreboot_table.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * coreboot_table.h * @@ -6,21 +7,13 @@ * Copyright 2014 Gerd Hoffmann <kraxel@redhat.com> * Copyright 2017 Google Inc. * Copyright 2017 Samuel Holland <samuel@sholland.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License v2.0 as published by - * the Free Software Foundation. - * - * 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. */ #ifndef __COREBOOT_TABLE_H #define __COREBOOT_TABLE_H -#include <linux/io.h> +#include <linux/device.h> +#include <linux/mod_devicetable.h> /* Coreboot table header structure */ struct coreboot_table_header { @@ -47,6 +40,18 @@ struct lb_cbmem_ref { 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; @@ -73,22 +78,42 @@ struct coreboot_device { 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 *); - int (*remove)(struct coreboot_device *); + void (*remove)(struct coreboot_device *); struct device_driver drv; - u32 tag; + 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); +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 */ |