diff --git a/src/Makefile b/src/Makefile index 18e0334eb..f003599c5 100644 --- a/src/Makefile +++ b/src/Makefile @@ -73,6 +73,7 @@ SRCDIRS += drivers/block SRCDIRS += drivers/nvs SRCDIRS += drivers/bitbash SRCDIRS += drivers/infiniband +SRCDIRS += drivers/linux SRCDIRS += interface/pxe interface/efi interface/smbios interface/linux SRCDIRS += tests SRCDIRS += crypto crypto/axtls crypto/matrixssl diff --git a/src/drivers/linux/linux.c b/src/drivers/linux/linux.c new file mode 100644 index 000000000..1f26f5663 --- /dev/null +++ b/src/drivers/linux/linux.c @@ -0,0 +1,152 @@ +/* + * Copyright (C) 2010 Piotr Jaroszyński + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +FILE_LICENCE(GPL2_OR_LATER); + +/** @file + * + * Linux root_device and root_driver. + */ + +#include +#include +#include +#include +#include +#include + +LIST_HEAD(linux_device_requests); +LIST_HEAD(linux_global_settings); + +/** Go over the device requests looking for a matching linux driver to handle them. */ +static int linux_probe(struct root_device *rootdev) +{ + struct linux_device_request *request; + struct linux_driver *driver; + struct linux_device *device = NULL; + int rc; + + /* Apply global settings */ + linux_apply_settings(&linux_global_settings, NULL); + + list_for_each_entry(request, &linux_device_requests, list) { + if (! device) + device = zalloc(sizeof(*device)); + + if (! device) + return -ENOMEM; + + rc = 1; + + for_each_table_entry(driver, LINUX_DRIVERS) { + if ((rc = strcmp(driver->name, request->driver)) == 0) + break; + } + + if (rc != 0) { + printf("Linux driver '%s' not found\n", request->driver); + continue; + } + + if (! driver->can_probe) { + printf("Driver '%s' cannot handle any more devices\n", driver->name); + continue; + } + + /* We found a matching driver so add the device to the hierarchy */ + list_add(&device->dev.siblings, &rootdev->dev.children); + device->dev.parent = &rootdev->dev; + INIT_LIST_HEAD(&device->dev.children); + + if (driver->probe(device, request) == 0) { + device->driver = driver; + /* Driver handled the device so release ownership */ + device = NULL; + } else { + /* Driver failed to handle the device so remove it from the hierarchy + * and reuse the object */ + list_del(&device->dev.siblings); + } + }; + + free(device); + + return 0; +} + +/** Remove all the linux devices registered in probe() */ +static void linux_remove(struct root_device *rootdev) +{ + struct linux_device *device; + struct linux_device *tmp; + + list_for_each_entry_safe(device, tmp, &rootdev->dev.children, dev.siblings) { + list_del(&device->dev.siblings); + device->driver->remove(device); + free(device); + } +} + +/** Linux root driver */ +static struct root_driver linux_root_driver = { + .probe = linux_probe, + .remove = linux_remove, +}; + +/** Linux root device */ +struct root_device linux_root_device __root_device = { + .dev = { .name = "linux" }, + .driver = &linux_root_driver, +}; + +struct linux_setting *linux_find_setting(char *name, struct list_head *settings) +{ + struct linux_setting *setting; + struct linux_setting *result = NULL; + + /* Find the last occurrence of a setting with the specified name */ + list_for_each_entry(setting, settings, list) { + if (strcmp(setting->name, name) == 0) { + result = setting; + } + } + + return result; +} + +void linux_apply_settings(struct list_head *new_settings, struct settings *settings_block) +{ + struct linux_setting *setting; + int rc; + + list_for_each_entry(setting, new_settings, list) { + /* Skip already applied settings */ + if (setting->applied) + continue; + + struct setting *s = find_setting(setting->name); + if (s) { + rc = storef_setting(settings_block, find_setting(setting->name), setting->value); + if (rc != 0) + DBG("linux storing setting '%s' = '%s' failed\n", setting->name, setting->value); + setting->applied = 1; + } else { + DBG("linux unknown setting '%s'\n", setting->name); + } + } +} diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index baeeec6ca..91dc19bcf 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -61,6 +61,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define ERRFILE_isapnp ( ERRFILE_DRIVER | 0x00020000 ) #define ERRFILE_mca ( ERRFILE_DRIVER | 0x00030000 ) #define ERRFILE_pci ( ERRFILE_DRIVER | 0x00040000 ) +#define ERRFILE_linux ( ERRFILE_DRIVER | 0x00050000 ) #define ERRFILE_nvs ( ERRFILE_DRIVER | 0x00100000 ) #define ERRFILE_spi ( ERRFILE_DRIVER | 0x00110000 ) diff --git a/src/include/ipxe/linux.h b/src/include/ipxe/linux.h new file mode 100644 index 000000000..dac508ea6 --- /dev/null +++ b/src/include/ipxe/linux.h @@ -0,0 +1,144 @@ +/* + * Copyright (C) 2010 Piotr Jaroszyński + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef _IPXE_LINUX_H +#define _IPXE_LINUX_H + +FILE_LICENCE(GPL2_OR_LATER); + +/** @file + * + * Linux devices, drivers and device requests. + */ + +#include +#include +#include + +/** A linux device */ +struct linux_device { + /** Generic device */ + struct device dev; + /** Driver that's handling the device */ + struct linux_driver *driver; + /** Private data used by drivers */ + void *priv; +}; + +struct linux_device_request; + +/** A linux driver */ +struct linux_driver { + /** Name */ + char *name; + /** Probe function */ + int (*probe)(struct linux_device *device, struct linux_device_request *request); + /** Remove function */ + void (*remove)(struct linux_device *device); + /** Can the driver probe any more devices? */ + int can_probe; +}; + +/** Linux driver table */ +#define LINUX_DRIVERS __table(struct linux_driver, "linux_drivers") + +/** Declare a Linux driver */ +#define __linux_driver __table_entry(LINUX_DRIVERS, 01) + +/** + * Set linux device driver-private data + * + * @v device Linux device + * @v priv Private data + */ +static inline void linux_set_drvdata(struct linux_device * device, void *priv) +{ + device->priv = priv; +} + +/** + * Get linux device driver-private data + * + * @v device Linux device + * @ret priv Private data + */ +static inline void *linux_get_drvdata(struct linux_device *device) +{ + return device->priv; +} + +/** + * A device request. + * + * To be created and filled by the UI code. + */ +struct linux_device_request { + /** Driver name. Compared to the linux drivers' names */ + char *driver; + /** List node */ + struct list_head list; + /** List of settings */ + struct list_head settings; +}; + +/** A device request setting */ +struct linux_setting { + /** Name */ + char *name; + /** Value */ + char *value; + /** Was the setting already applied? */ + int applied; + /** List node */ + struct list_head list; +}; + +/** + * List of requested devices. + * + * Filled by the UI code. Linux root_driver walks over this list looking for an + * appropriate driver to handle each request by matching the driver's name. + */ +extern struct list_head linux_device_requests; + +/** + * List of global settings to apply. + * + * Filled by the UI code. Linux root_driver applies these settings. + */ +extern struct list_head linux_global_settings; + +/** + * Look for the last occurrence of a setting with the specified name + * + * @v name Name of the setting to look for + * @v settings List of the settings to look through + */ +struct linux_setting *linux_find_setting(char *name, struct list_head *settings); + +/** + * Apply a list of linux settings to a settings block + * + * @v new_settings List of linux_setting's to apply + * @v settings_block Settings block to apply the settings to + * @ret rc 0 on success + */ +extern void linux_apply_settings(struct list_head *new_settings, struct settings *settings_block); + + +#endif /* _IPXE_LINUX_H */