diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 19:07:10 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-04 19:15:35 -0700 |
commit | af82455f7dbd9dc20244d80d033721b30d22c065 (patch) | |
tree | 3b9246456e82ae116b57834a2f0b4a307a016474 /drivers/firmware/google | |
parent | 0be75179df5e20306528800fc7c6a504b12b97db (diff) | |
parent | 2a76f89fa58c769241cfc21f2614705591519ae3 (diff) |
Merge tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of new char/misc driver drivers and features for
4.12-rc1.
There's lots of new drivers added this time around, new firmware
drivers from Google, more auxdisplay drivers, extcon drivers, fpga
drivers, and a bunch of other driver updates. Nothing major, except if
you happen to have the hardware for these drivers, and then you will
be happy :)
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits)
firmware: google memconsole: Fix return value check in platform_memconsole_init()
firmware: Google VPD: Fix return value check in vpd_platform_init()
goldfish_pipe: fix build warning about using too much stack.
goldfish_pipe: An implementation of more parallel pipe
fpga fr br: update supported version numbers
fpga: region: release FPGA region reference in error path
fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe()
mei: drop the TODO from samples
firmware: Google VPD sysfs driver
firmware: Google VPD: import lib_vpd source files
misc: lkdtm: Add volatile to intentional NULL pointer reference
eeprom: idt_89hpesx: Add OF device ID table
misc: ds1682: Add OF device ID table
misc: tsl2550: Add OF device ID table
w1: Remove unneeded use of assert() and remove w1_log.h
w1: Use kernel common min() implementation
uio_mf624: Align memory regions to page size and set correct offsets
uio_mf624: Refactor memory info initialization
uio: Allow handling of non page-aligned memory regions
hangcheck-timer: Fix typo in comment
...
Diffstat (limited to 'drivers/firmware/google')
-rw-r--r-- | drivers/firmware/google/Kconfig | 59 | ||||
-rw-r--r-- | drivers/firmware/google/Makefile | 10 | ||||
-rw-r--r-- | drivers/firmware/google/coreboot_table-acpi.c | 88 | ||||
-rw-r--r-- | drivers/firmware/google/coreboot_table-of.c | 82 | ||||
-rw-r--r-- | drivers/firmware/google/coreboot_table.c | 94 | ||||
-rw-r--r-- | drivers/firmware/google/coreboot_table.h | 50 | ||||
-rw-r--r-- | drivers/firmware/google/memconsole-coreboot.c | 109 | ||||
-rw-r--r-- | drivers/firmware/google/memconsole-x86-legacy.c | 153 | ||||
-rw-r--r-- | drivers/firmware/google/memconsole.c | 155 | ||||
-rw-r--r-- | drivers/firmware/google/memconsole.h | 43 | ||||
-rw-r--r-- | drivers/firmware/google/vpd.c | 332 | ||||
-rw-r--r-- | drivers/firmware/google/vpd_decode.c | 99 | ||||
-rw-r--r-- | drivers/firmware/google/vpd_decode.h | 58 |
13 files changed, 1191 insertions, 141 deletions
diff --git a/drivers/firmware/google/Kconfig b/drivers/firmware/google/Kconfig index 29c8cdda82a1..f16b381a569c 100644 --- a/drivers/firmware/google/Kconfig +++ b/drivers/firmware/google/Kconfig @@ -1,18 +1,16 @@ -config GOOGLE_FIRMWARE +menuconfig GOOGLE_FIRMWARE bool "Google Firmware Drivers" - depends on X86 default n help These firmware drivers are used by Google's servers. They are only useful if you are working directly on one of their proprietary servers. If in doubt, say "N". -menu "Google Firmware Drivers" - depends on GOOGLE_FIRMWARE +if GOOGLE_FIRMWARE config GOOGLE_SMI tristate "SMI interface for Google platforms" - depends on ACPI && DMI && EFI + depends on X86 && ACPI && DMI && EFI select EFI_VARS help Say Y here if you want to enable SMI callbacks for Google @@ -20,12 +18,57 @@ config GOOGLE_SMI clearing the EFI event log and reading and writing NVRAM variables. +config GOOGLE_COREBOOT_TABLE + tristate + depends on GOOGLE_COREBOOT_TABLE_ACPI || GOOGLE_COREBOOT_TABLE_OF + +config GOOGLE_COREBOOT_TABLE_ACPI + tristate "Coreboot Table Access - ACPI" + depends on ACPI + select GOOGLE_COREBOOT_TABLE + help + This option enables the coreboot_table module, which provides other + firmware modules to access to the coreboot table. The coreboot table + pointer is accessed through the ACPI "GOOGCB00" object. + If unsure say N. + +config GOOGLE_COREBOOT_TABLE_OF + tristate "Coreboot Table Access - Device Tree" + depends on OF + select GOOGLE_COREBOOT_TABLE + help + This option enable the coreboot_table module, which provide other + firmware modules to access coreboot table. The coreboot table pointer + is accessed through the device tree node /firmware/coreboot. + If unsure say N. + config GOOGLE_MEMCONSOLE - tristate "Firmware Memory Console" - depends on DMI + tristate + depends on GOOGLE_MEMCONSOLE_X86_LEGACY || GOOGLE_MEMCONSOLE_COREBOOT + +config GOOGLE_MEMCONSOLE_X86_LEGACY + tristate "Firmware Memory Console - X86 Legacy support" + depends on X86 && ACPI && DMI + select GOOGLE_MEMCONSOLE help This option enables the kernel to search for a firmware log in the EBDA on Google servers. If found, this log is exported to userland in the file /sys/firmware/log. -endmenu +config GOOGLE_MEMCONSOLE_COREBOOT + tristate "Firmware Memory Console" + depends on GOOGLE_COREBOOT_TABLE + select GOOGLE_MEMCONSOLE + help + This option enables the kernel to search for a firmware log in + the coreboot table. If found, this log is exported to userland + in the file /sys/firmware/log. + +config GOOGLE_VPD + tristate "Vital Product Data" + depends on GOOGLE_COREBOOT_TABLE + help + This option enables the kernel to expose the content of Google VPD + under /sys/firmware/vpd. + +endif # GOOGLE_FIRMWARE diff --git a/drivers/firmware/google/Makefile b/drivers/firmware/google/Makefile index 54a294e3cb61..bc4de02202ad 100644 --- a/drivers/firmware/google/Makefile +++ b/drivers/firmware/google/Makefile @@ -1,3 +1,11 @@ obj-$(CONFIG_GOOGLE_SMI) += gsmi.o -obj-$(CONFIG_GOOGLE_MEMCONSOLE) += memconsole.o +obj-$(CONFIG_GOOGLE_COREBOOT_TABLE) += coreboot_table.o +obj-$(CONFIG_GOOGLE_COREBOOT_TABLE_ACPI) += coreboot_table-acpi.o +obj-$(CONFIG_GOOGLE_COREBOOT_TABLE_OF) += coreboot_table-of.o +obj-$(CONFIG_GOOGLE_MEMCONSOLE) += memconsole.o +obj-$(CONFIG_GOOGLE_MEMCONSOLE_COREBOOT) += memconsole-coreboot.o +obj-$(CONFIG_GOOGLE_MEMCONSOLE_X86_LEGACY) += memconsole-x86-legacy.o + +vpd-sysfs-y := vpd.o vpd_decode.o +obj-$(CONFIG_GOOGLE_VPD) += vpd-sysfs.o diff --git a/drivers/firmware/google/coreboot_table-acpi.c b/drivers/firmware/google/coreboot_table-acpi.c new file mode 100644 index 000000000000..fb98db2d20e2 --- /dev/null +++ b/drivers/firmware/google/coreboot_table-acpi.c @@ -0,0 +1,88 @@ +/* + * coreboot_table-acpi.c + * + * Using ACPI to locate Coreboot table and provide coreboot table access. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include "coreboot_table.h" + +static int coreboot_table_acpi_probe(struct platform_device *pdev) +{ + phys_addr_t phyaddr; + resource_size_t len; + struct coreboot_table_header __iomem *header = NULL; + struct resource *res; + void __iomem *ptr = NULL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + len = resource_size(res); + if (!res->start || !len) + return -EINVAL; + + phyaddr = res->start; + header = ioremap_cache(phyaddr, sizeof(*header)); + if (header == NULL) + return -ENOMEM; + + ptr = ioremap_cache(phyaddr, + header->header_bytes + header->table_bytes); + iounmap(header); + if (!ptr) + return -ENOMEM; + + return coreboot_table_init(ptr); +} + +static int coreboot_table_acpi_remove(struct platform_device *pdev) +{ + return coreboot_table_exit(); +} + +static const struct acpi_device_id cros_coreboot_acpi_match[] = { + { "GOOGCB00", 0 }, + { "BOOT0000", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, cros_coreboot_acpi_match); + +static struct platform_driver coreboot_table_acpi_driver = { + .probe = coreboot_table_acpi_probe, + .remove = coreboot_table_acpi_remove, + .driver = { + .name = "coreboot_table_acpi", + .acpi_match_table = ACPI_PTR(cros_coreboot_acpi_match), + }, +}; + +static int __init coreboot_table_acpi_init(void) +{ + return platform_driver_register(&coreboot_table_acpi_driver); +} + +module_init(coreboot_table_acpi_init); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/coreboot_table-of.c b/drivers/firmware/google/coreboot_table-of.c new file mode 100644 index 000000000000..727acdc83e83 --- /dev/null +++ b/drivers/firmware/google/coreboot_table-of.c @@ -0,0 +1,82 @@ +/* + * coreboot_table-of.c + * + * Coreboot table access through open firmware. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/device.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> + +#include "coreboot_table.h" + +static int coreboot_table_of_probe(struct platform_device *pdev) +{ + struct device_node *fw_dn = pdev->dev.of_node; + void __iomem *ptr; + + ptr = of_iomap(fw_dn, 0); + of_node_put(fw_dn); + if (!ptr) + return -ENOMEM; + + return coreboot_table_init(ptr); +} + +static int coreboot_table_of_remove(struct platform_device *pdev) +{ + return coreboot_table_exit(); +} + +static const struct of_device_id coreboot_of_match[] = { + { .compatible = "coreboot" }, + {}, +}; + +static struct platform_driver coreboot_table_of_driver = { + .probe = coreboot_table_of_probe, + .remove = coreboot_table_of_remove, + .driver = { + .name = "coreboot_table_of", + .of_match_table = coreboot_of_match, + }, +}; + +static int __init platform_coreboot_table_of_init(void) +{ + struct platform_device *pdev; + struct device_node *of_node; + + /* Limit device creation to the presence of /firmware/coreboot node */ + of_node = of_find_node_by_path("/firmware/coreboot"); + if (!of_node) + return -ENODEV; + + if (!of_match_node(coreboot_of_match, of_node)) + return -ENODEV; + + pdev = of_platform_device_create(of_node, "coreboot_table_of", NULL); + if (!pdev) + return -ENODEV; + + return platform_driver_register(&coreboot_table_of_driver); +} + +module_init(platform_coreboot_table_of_init); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/coreboot_table.c b/drivers/firmware/google/coreboot_table.c new file mode 100644 index 000000000000..0019d3ec18dd --- /dev/null +++ b/drivers/firmware/google/coreboot_table.c @@ -0,0 +1,94 @@ +/* + * coreboot_table.c + * + * Module providing coreboot table access. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/err.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include "coreboot_table.h" + +struct coreboot_table_entry { + u32 tag; + u32 size; +}; + +static struct coreboot_table_header __iomem *ptr_header; + +/* + * This function parses the coreboot table for an entry that contains the base + * address of the given entry tag. The coreboot table consists of a header + * directly followed by a number of small, variable-sized entries, which each + * contain an identifying tag and their length as the first two fields. + */ +int coreboot_table_find(int tag, void *data, size_t data_size) +{ + struct coreboot_table_header header; + struct coreboot_table_entry entry; + void *ptr_entry; + int i; + + if (!ptr_header) + return -EPROBE_DEFER; + + memcpy_fromio(&header, ptr_header, sizeof(header)); + + if (strncmp(header.signature, "LBIO", sizeof(header.signature))) { + pr_warn("coreboot_table: coreboot table missing or corrupt!\n"); + return -ENODEV; + } + + ptr_entry = (void *)ptr_header + header.header_bytes; + + for (i = 0; i < header.table_entries; i++) { + memcpy_fromio(&entry, ptr_entry, sizeof(entry)); + if (entry.tag == tag) { + if (data_size < entry.size) + return -EINVAL; + + memcpy_fromio(data, ptr_entry, entry.size); + + return 0; + } + + ptr_entry += entry.size; + } + + return -ENOENT; +} +EXPORT_SYMBOL(coreboot_table_find); + +int coreboot_table_init(void __iomem *ptr) +{ + ptr_header = ptr; + + return 0; +} +EXPORT_SYMBOL(coreboot_table_init); + +int coreboot_table_exit(void) +{ + if (ptr_header) + iounmap(ptr_header); + + return 0; +} +EXPORT_SYMBOL(coreboot_table_exit); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/coreboot_table.h b/drivers/firmware/google/coreboot_table.h new file mode 100644 index 000000000000..6eff1ae0c5d3 --- /dev/null +++ b/drivers/firmware/google/coreboot_table.h @@ -0,0 +1,50 @@ +/* + * coreboot_table.h + * + * Internal header for coreboot table access. + * + * Copyright 2017 Google Inc. + * + * 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> + +/* List of coreboot entry structures that is used */ +struct lb_cbmem_ref { + uint32_t tag; + uint32_t size; + + uint64_t cbmem_addr; +}; + +/* 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; +}; + +/* Retrieve coreboot table entry with tag *tag* and copy it to data */ +int coreboot_table_find(int tag, void *data, size_t data_size); + +/* Initialize coreboot table module given a pointer to iomem */ +int coreboot_table_init(void __iomem *ptr); + +/* Cleanup coreboot table module */ +int coreboot_table_exit(void); + +#endif /* __COREBOOT_TABLE_H */ diff --git a/drivers/firmware/google/memconsole-coreboot.c b/drivers/firmware/google/memconsole-coreboot.c new file mode 100644 index 000000000000..02711114dece --- /dev/null +++ b/drivers/firmware/google/memconsole-coreboot.c @@ -0,0 +1,109 @@ +/* + * memconsole-coreboot.c + * + * Memory based BIOS console accessed through coreboot table. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include "memconsole.h" +#include "coreboot_table.h" + +#define CB_TAG_CBMEM_CONSOLE 0x17 + +/* CBMEM firmware console log descriptor. */ +struct cbmem_cons { + u32 buffer_size; + u32 buffer_cursor; + u8 buffer_body[0]; +} __packed; + +static struct cbmem_cons __iomem *cbmem_console; + +static int memconsole_coreboot_init(phys_addr_t physaddr) +{ + struct cbmem_cons __iomem *tmp_cbmc; + + tmp_cbmc = memremap(physaddr, sizeof(*tmp_cbmc), MEMREMAP_WB); + + if (!tmp_cbmc) + return -ENOMEM; + + cbmem_console = memremap(physaddr, + tmp_cbmc->buffer_size + sizeof(*cbmem_console), + MEMREMAP_WB); + memunmap(tmp_cbmc); + + if (!cbmem_console) + return -ENOMEM; + + memconsole_setup(cbmem_console->buffer_body, + min(cbmem_console->buffer_cursor, cbmem_console->buffer_size)); + + return 0; +} + +static int memconsole_probe(struct platform_device *pdev) +{ + int ret; + struct lb_cbmem_ref entry; + + ret = coreboot_table_find(CB_TAG_CBMEM_CONSOLE, &entry, sizeof(entry)); + if (ret) + return ret; + + ret = memconsole_coreboot_init(entry.cbmem_addr); + if (ret) + return ret; + + return memconsole_sysfs_init(); +} + +static int memconsole_remove(struct platform_device *pdev) +{ + memconsole_exit(); + + if (cbmem_console) + memunmap(cbmem_console); + + return 0; +} + +static struct platform_driver memconsole_driver = { + .probe = memconsole_probe, + .remove = memconsole_remove, + .driver = { + .name = "memconsole", + }, +}; + +static int __init platform_memconsole_init(void) +{ + struct platform_device *pdev; + + pdev = platform_device_register_simple("memconsole", -1, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + platform_driver_register(&memconsole_driver); + + return 0; +} + +module_init(platform_memconsole_init); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/memconsole-x86-legacy.c b/drivers/firmware/google/memconsole-x86-legacy.c new file mode 100644 index 000000000000..1f279ee883b9 --- /dev/null +++ b/drivers/firmware/google/memconsole-x86-legacy.c @@ -0,0 +1,153 @@ +/* + * memconsole-x86-legacy.c + * + * EBDA specific parts of the memory based BIOS console. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/mm.h> +#include <asm/bios_ebda.h> +#include <linux/acpi.h> + +#include "memconsole.h" + +#define BIOS_MEMCONSOLE_V1_MAGIC 0xDEADBABE +#define BIOS_MEMCONSOLE_V2_MAGIC (('M')|('C'<<8)|('O'<<16)|('N'<<24)) + +struct biosmemcon_ebda { + u32 signature; + union { + struct { + u8 enabled; + u32 buffer_addr; + u16 start; + u16 end; + u16 num_chars; + u8 wrapped; + } __packed v1; + struct { + u32 buffer_addr; + /* Misdocumented as number of pages! */ + u16 num_bytes; + u16 start; + u16 end; + } __packed v2; + }; +} __packed; + +static void found_v1_header(struct biosmemcon_ebda *hdr) +{ + pr_info("memconsole: BIOS console v1 EBDA structure found at %p\n", + hdr); + pr_info("memconsole: BIOS console buffer at 0x%.8x, start = %d, end = %d, num = %d\n", + hdr->v1.buffer_addr, hdr->v1.start, + hdr->v1.end, hdr->v1.num_chars); + + memconsole_setup(phys_to_virt(hdr->v1.buffer_addr), hdr->v1.num_chars); +} + +static void found_v2_header(struct biosmemcon_ebda *hdr) +{ + pr_info("memconsole: BIOS console v2 EBDA structure found at %p\n", + hdr); + pr_info("memconsole: BIOS console buffer at 0x%.8x, start = %d, end = %d, num_bytes = %d\n", + hdr->v2.buffer_addr, hdr->v2.start, + hdr->v2.end, hdr->v2.num_bytes); + + memconsole_setup(phys_to_virt(hdr->v2.buffer_addr + hdr->v2.start), + hdr->v2.end - hdr->v2.start); +} + +/* + * Search through the EBDA for the BIOS Memory Console, and + * set the global variables to point to it. Return true if found. + */ +static bool memconsole_ebda_init(void) +{ + unsigned int address; + size_t length, cur; + + address = get_bios_ebda(); + if (!address) { + pr_info("memconsole: BIOS EBDA non-existent.\n"); + return false; + } + + /* EBDA length is byte 0 of EBDA (in KB) */ + length = *(u8 *)phys_to_virt(address); + length <<= 10; /* convert to bytes */ + + /* + * Search through EBDA for BIOS memory console structure + * note: signature is not necessarily dword-aligned + */ + for (cur = 0; cur < length; cur++) { + struct biosmemcon_ebda *hdr = phys_to_virt(address + cur); + + /* memconsole v1 */ + if (hdr->signature == BIOS_MEMCONSOLE_V1_MAGIC) { + found_v1_header(hdr); + return true; + } + + /* memconsole v2 */ + if (hdr->signature == BIOS_MEMCONSOLE_V2_MAGIC) { + found_v2_header(hdr); + return true; + } + } + + pr_info("memconsole: BIOS console EBDA structure not found!\n"); + return false; +} + +static struct dmi_system_id memconsole_dmi_table[] __initdata = { + { + .ident = "Google Board", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Google, Inc."), + }, + }, + {} +}; +MODULE_DEVICE_TABLE(dmi, memconsole_dmi_table); + +static bool __init memconsole_find(void) +{ + if (!dmi_check_system(memconsole_dmi_table)) + return false; + + return memconsole_ebda_init(); +} + +static int __init memconsole_x86_init(void) +{ + if (!memconsole_find()) + return -ENODEV; + + return memconsole_sysfs_init(); +} + +static void __exit memconsole_x86_exit(void) +{ + memconsole_exit(); +} + +module_init(memconsole_x86_init); +module_exit(memconsole_x86_exit); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/memconsole.c b/drivers/firmware/google/memconsole.c index 2f569aaed4c7..94e200ddb4fa 100644 --- a/drivers/firmware/google/memconsole.c +++ b/drivers/firmware/google/memconsole.c @@ -1,66 +1,36 @@ /* * memconsole.c * - * Infrastructure for importing the BIOS memory based console - * into the kernel log ringbuffer. + * Architecture-independent parts of the memory based BIOS console. * - * Copyright 2010 Google Inc. All rights reserved. + * Copyright 2017 Google Inc. + * + * 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. */ -#include <linux/ctype.h> #include <linux/init.h> -#include <linux/kernel.h> -#include <linux/string.h> #include <linux/sysfs.h> #include <linux/kobject.h> #include <linux/module.h> -#include <linux/dmi.h> -#include <linux/io.h> -#include <asm/bios_ebda.h> -#define BIOS_MEMCONSOLE_V1_MAGIC 0xDEADBABE -#define BIOS_MEMCONSOLE_V2_MAGIC (('M')|('C'<<8)|('O'<<16)|('N'<<24)) +#include "memconsole.h" -struct biosmemcon_ebda { - u32 signature; - union { - struct { - u8 enabled; - u32 buffer_addr; - u16 start; - u16 end; - u16 num_chars; - u8 wrapped; - } __packed v1; - struct { - u32 buffer_addr; - /* Misdocumented as number of pages! */ - u16 num_bytes; - u16 start; - u16 end; - } __packed v2; - }; -} __packed; - -static u32 memconsole_baseaddr; +static char *memconsole_baseaddr; static size_t memconsole_length; static ssize_t memconsole_read(struct file *filp, struct kobject *kobp, struct bin_attribute *bin_attr, char *buf, loff_t pos, size_t count) { - char *memconsole; - ssize_t ret; - - memconsole = ioremap_cache(memconsole_baseaddr, memconsole_length); - if (!memconsole) { - pr_err("memconsole: ioremap_cache failed\n"); - return -ENOMEM; - } - ret = memory_read_from_buffer(buf, count, &pos, memconsole, - memconsole_length); - iounmap(memconsole); - return ret; + return memory_read_from_buffer(buf, count, &pos, memconsole_baseaddr, + memconsole_length); } static struct bin_attribute memconsole_bin_attr = { @@ -68,104 +38,25 @@ static struct bin_attribute memconsole_bin_attr = { .read = memconsole_read, }; - -static void __init found_v1_header(struct biosmemcon_ebda *hdr) -{ - pr_info("BIOS console v1 EBDA structure found at %p\n", hdr); - pr_info("BIOS console buffer at 0x%.8x, " - "start = %d, end = %d, num = %d\n", - hdr->v1.buffer_addr, hdr->v1.start, - hdr->v1.end, hdr->v1.num_chars); - - memconsole_length = hdr->v1.num_chars; - memconsole_baseaddr = hdr->v1.buffer_addr; -} - -static void __init found_v2_header(struct biosmemcon_ebda *hdr) -{ - pr_info("BIOS console v2 EBDA structure found at %p\n", hdr); - pr_info("BIOS console buffer at 0x%.8x, " - "start = %d, end = %d, num_bytes = %d\n", - hdr->v2.buffer_addr, hdr->v2.start, - hdr->v2.end, hdr->v2.num_bytes); - - memconsole_length = hdr->v2.end - hdr->v2.start; - memconsole_baseaddr = hdr->v2.buffer_addr + hdr->v2.start; -} - -/* - * Search through the EBDA for the BIOS Memory Console, and - * set the global variables to point to it. Return true if found. - */ -static bool __init found_memconsole(void) +void memconsole_setup(void *baseaddr, size_t length) { - unsigned int address; - size_t length, cur; - - address = get_bios_ebda(); - if (!address) { - pr_info("BIOS EBDA non-existent.\n"); - return false; - } - - /* EBDA length is byte 0 of EBDA (in KB) */ - length = *(u8 *)phys_to_virt(address); - length <<= 10; /* convert to bytes */ - - /* - * Search through EBDA for BIOS memory console structure - * note: signature is not necessarily dword-aligned - */ - for (cur = 0; cur < length; cur++) { - struct biosmemcon_ebda *hdr = phys_to_virt(address + cur); - - /* memconsole v1 */ - if (hdr->signature == BIOS_MEMCONSOLE_V1_MAGIC) { - found_v1_header(hdr); - return true; - } - - /* memconsole v2 */ - if (hdr->signature == BIOS_MEMCONSOLE_V2_MAGIC) { - found_v2_header(hdr); - return true; - } - } - - pr_info("BIOS console EBDA structure not found!\n"); - return false; + memconsole_baseaddr = baseaddr; + memconsole_length = length; } +EXPORT_SYMBOL(memconsole_setup); -static struct dmi_system_id memconsole_dmi_table[] __initdata = { - { - .ident = "Google Board", - .matches = { - DMI_MATCH(DMI_BOARD_VENDOR, "Google, Inc."), - }, - }, - {} -}; -MODULE_DEVICE_TABLE(dmi, memconsole_dmi_table); - -static int __init memconsole_init(void) +int memconsole_sysfs_init(void) { - if (!dmi_check_system(memconsole_dmi_table)) - return -ENODEV; - - if (!found_memconsole()) - return -ENODEV; - memconsole_bin_attr.size = memconsole_length; return sysfs_create_bin_file(firmware_kobj, &memconsole_bin_attr); } +EXPORT_SYMBOL(memconsole_sysfs_init); -static void __exit memconsole_exit(void) +void memconsole_exit(void) { sysfs_remove_bin_file(firmware_kobj, &memconsole_bin_attr); } - -module_init(memconsole_init); -module_exit(memconsole_exit); +EXPORT_SYMBOL(memconsole_exit); MODULE_AUTHOR("Google, Inc."); MODULE_LICENSE("GPL"); diff --git a/drivers/firmware/google/memconsole.h b/drivers/firmware/google/memconsole.h new file mode 100644 index 000000000000..190fc03a51ae --- /dev/null +++ b/drivers/firmware/google/memconsole.h @@ -0,0 +1,43 @@ +/* + * memconsole.h + * + * Internal headers of the memory based BIOS console. + * + * Copyright 2017 Google Inc. + * + * 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 __FIRMWARE_GOOGLE_MEMCONSOLE_H +#define __FIRMWARE_GOOGLE_MEMCONSOLE_H + +/* + * memconsole_setup + * + * Initialize the memory console from raw (virtual) base + * address and length. + */ +void memconsole_setup(void *baseaddr, size_t length); + +/* + * memconsole_sysfs_init + * + * Update memory console length and create binary file + * for firmware object. + */ +int memconsole_sysfs_init(void); + +/* memconsole_exit + * + * Unmap the console buffer. + */ +void memconsole_exit(void); + +#endif /* __FIRMWARE_GOOGLE_MEMCONSOLE_H */ diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c new file mode 100644 index 000000000000..3ce813110d5e --- /dev/null +++ b/drivers/firmware/google/vpd.c @@ -0,0 +1,332 @@ +/* + * vpd.c + * + * Driver for exporting VPD content to sysfs. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/kobject.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/sysfs.h> + +#include "coreboot_table.h" +#include "vpd_decode.h" + +#define CB_TAG_VPD 0x2c +#define VPD_CBMEM_MAGIC 0x43524f53 + +static struct kobject *vpd_kobj; + +struct vpd_cbmem { + u32 magic; + u32 version; + u32 ro_size; + u32 rw_size; + u8 blob[0]; +}; + +struct vpd_section { + bool enabled; + const char *name; + char *raw_name; /* the string name_raw */ + struct kobject *kobj; /* vpd/name directory */ + char *baseaddr; |