pax_global_header00006660000000000000000000000064122477344360014526gustar00rootroot0000000000000052 comment=0c38f97c3a647aebbc298b830ac7496bfcb86a7d bbswitch-0.8/000077500000000000000000000000001224773443600132025ustar00rootroot00000000000000bbswitch-0.8/.gitignore000066400000000000000000000001331224773443600151670ustar00rootroot00000000000000*.cmd .tmp_versions Module.symvers *.ko *.mod.c *.o modules.order bbswitch-*.tar.gz .*.sw* bbswitch-0.8/COPYING000066400000000000000000000432541224773443600142450ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 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 (at your option) 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 Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. bbswitch-0.8/Makefile000066400000000000000000000012111224773443600146350ustar00rootroot00000000000000modname := bbswitch obj-m := $(modname).o KVERSION := $(shell uname -r) KDIR := /lib/modules/$(KVERSION)/build PWD := "$$(pwd)" ifdef DEBUG CFLAGS_$(obj-m) := -DDEBUG endif default: $(MAKE) -C $(KDIR) M=$(PWD) modules clean: $(MAKE) O=$(PWD) -C $(KDIR) M=$(PWD) clean load: -rmmod $(modname) insmod $(modname).ko install: mkdir -p /lib/modules/$(KVERSION)/misc/$(modname) install -m 0755 -o root -g root $(modname).ko /lib/modules/$(KVERSION)/misc/$(modname) depmod -a uninstall: rm /lib/modules/$(KVERSION)/misc/$(modname)/$(modname).ko rmdir /lib/modules/$(KVERSION)/misc/$(modname) rmdir /lib/modules/$(KVERSION)/misc depmod -a bbswitch-0.8/Makefile.dkms000066400000000000000000000011341224773443600155760ustar00rootroot00000000000000modname := bbswitch DKMS := dkms modver := $(shell awk -F'"' '/define *BBSWITCH_VERSION/{print $$2}' < bbswitch.c) # directory in which generated files are stored DKMS_DEST := /usr/src/$(modname)-$(modver) all: install src_install: mkdir -p '$(DKMS_DEST)' cp Makefile bbswitch.c '$(DKMS_DEST)' sed 's/#MODULE_VERSION#/$(modver)/' dkms/dkms.conf > '$(DKMS_DEST)/dkms.conf' build: src_install $(DKMS) build -m bbswitch -v $(modver) install: build $(DKMS) install -m bbswitch -v $(modver) uninstall: $(DKMS) remove -m bbswitch -v $(modver) --all .PHONY: all src_install build install uninstall bbswitch-0.8/NEWS000066400000000000000000000034041224773443600137020ustar00rootroot00000000000000Version 0.8 - 5 December 2013 * Compatibility with Linux 3.13. Version 0.7 - 28 May 2013 * Fixes a scary WARNING on Linux 3.9. * Improved debug information when an ACPI method cannot be executed. * Added copyright information, update my name. Version 0.6 - 19 March 2013 * Add workaround for Linux 3.8 regression (not present in earlier or latter versions) that prevented the video card from turned off unless a driver was loaded before. * Compatibility with grsec patches. * Add 'skip_optimus_dsm' module option so users of Lenovo T410s can use bbswitch by setting this option to true. * Clarify license (GPLv3). Version 0.5 - 22 October 2012 * Improved compatibility with older DKMS versions. * Set device state to D3cold instead of D3hot. * Only print DSM method call results when debugging is enabled. * Fixed runtime power management regression in Linux 3.6. Version 0.4.2 - 26 April 2012 * Fixed a documentation error on unload_state. * Added Makefile.dkms and documentation for easier installation using DKMS. * Make /proc/acpi/bbswitch world-writable * Fix NULL pointer dereference when reporting a failure during ACPI method evaluation. Version 0.4.1 - 16 January 2012 * Corrected a small error that yielded an confusing error message "The discrete card could not be enabled by a _DSM call" Version 0.4 - 15 January 2012 * Support for models that have a "3D controller" instead of "VGA compatible controller". Version 0.3 - 14 January 2012 * Support for models that have the nvidia DSM method on the integrated Intel video card instead of the nvidia one. This includes at the Acer Travelmate 8472TG and Acer Aspire 5745G. Version 0.2 - 2 January 2012 * Initial release, adding a kernel module that can disable discrete nvidia cards on Optimus systems. bbswitch-0.8/README.md000066400000000000000000000143061224773443600144650ustar00rootroot00000000000000*Migrated from https://github.com/Lekensteyn/acpi-stuff* About ----- bbswitch is a kernel module which automatically detects the required ACPI calls for two kinds of Optimus laptops. It has been verified to work with "real" Optimus and "legacy" Optimus laptops (at least, that is how I call them). The machines on which these tests has performed are: - Clevo B7130 - GT 425M ("real" Optimus, Lekensteyns laptop) - Dell Vostro 3500 - GT 310M ("legacy" Optimus, Samsagax' laptop) (note: there is no need to add more supported laptops here as the universal calls should work for every laptop model supporting either Optimus calls) It's preferred over manually hacking with the acpi_call module because it can detect the correct handle preceding _DSM and has some built-in safeguards: - You're not allowed to disable a card if a driver (nouveau, nvidia) is loaded. - Before suspend, the card is automatically enabled. When resuming, it's disabled again if that was the case before suspending. Hibernation should work, but it not tested. Precautionary measure : - On some machines, turning off the card is permanent and the card does not reappear on subsequents reboots, which can result into the screen staying black all the time, including the BIOS screen. If it occurs, first try to shutdown, unplug power cord, remove battery, wait 30s, then put everything back in and boot. If it's not solved, then the solution is to reset the BIOS to factory settings. Before executing bbswitch for the first time, it is therefore recommended to take note of the full key sequence in the BIOS to do a reset. Build ----- Build the module (kernel headers are required): make Then load it (requires root privileges, i.e. `sudo`): make load If your card is supported, there should be no error. Otherwise, you get a "No such device" (ENODEV) error. Check your kernel log (dmesg) for more information. DKMS support ------------ If you have DKMS installed, you can install bbswitch in such a way that it survives kernel upgrades. It is recommended to remove older versions of bbswitch by running `dkms remove -m bbswitch -v OLDVERSION --all` as root. To install the new version, simply run: # make -f Makefile.dkms To uninstall it, run: # make -f Makefile.dkms uninstall Usage ----- bbswitch has three commands to check the card status and switching (`#` means "run with root privileges, i.e. run it prefixed with `sudo `): ### Get the status: # cat /proc/acpi/bbswitch 0000:01:00.0 ON ### Turn the card off, respectively on: # tee /proc/acpi/bbswitch <<" start on runlevel [2345] stop on runlevel [016] pre-start exec /sbin/modprobe bbswitch load_state=0 unload_state=1 pre-stop exec /sbin/rmmod bbswitch Reporting bugs -------------- This module has been integrated in Bumblebee "Tumbleweed". Please report any issues on this module in the issue tracker and provide the following details: - The output of `dmesg | grep -C 10 bbswitch:` - The kernel version `uname -a` - Your distribution and version (if applicable) - The version of your Xorg and the driver - Submit your machine information on https://bugs.launchpad.net/bugs/752542; the instructions are listed in the bug description. Summary: install the packages containing `dmidecode`, `acpidump` and `iasl` and then run: wget http://lekensteyn.nl/files/get-acpi-info.sh sh get-acpi-info.sh - Information about the ACPI handles associated with PCI devices. Since this is a kernel module, you'll need kernel headers, gcc and automake. Commands: git clone git://github.com/Lekensteyn/acpi-stuff.git --depth 1 cd acpi-stuff/acpi_dump_info make sudo make load cat /proc/acpi/dump_info Upload the generated tarball on the above Launchpad URL and provide a link to the comment containing your report. bbswitch-0.8/bbswitch.c000066400000000000000000000364721224773443600151670ustar00rootroot00000000000000/** * Disable discrete graphics (currently nvidia only) * * Usage: * Disable discrete card * # echo OFF > /proc/acpi/bbswitch * Enable discrete card * # echo ON > /proc/acpi/bbswitch * Get status * # cat /proc/acpi/bbswitch */ /* * Copyright (C) 2011-2013 Bumblebee Project * Author: Peter Wu * * 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 * (at your option) 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, see . */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #define BBSWITCH_VERSION "0.8" MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Toggle the discrete graphics card"); MODULE_AUTHOR("Peter Wu "); MODULE_VERSION(BBSWITCH_VERSION); enum { CARD_UNCHANGED = -1, CARD_OFF = 0, CARD_ON = 1, }; static int load_state = CARD_UNCHANGED; MODULE_PARM_DESC(load_state, "Initial card state (0 = off, 1 = on, -1 = unchanged)"); module_param(load_state, int, 0400); static int unload_state = CARD_UNCHANGED; MODULE_PARM_DESC(unload_state, "Card state on unload (0 = off, 1 = on, -1 = unchanged)"); module_param(unload_state, int, 0600); static bool skip_optimus_dsm = false; MODULE_PARM_DESC(skip_optimus_dsm, "Skip probe of Optimus discrete DSM (default = false)"); module_param(skip_optimus_dsm, bool, 0400); extern struct proc_dir_entry *acpi_root_dir; static const char acpi_optimus_dsm_muid[16] = { 0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47, 0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0, }; static const char acpi_nvidia_dsm_muid[16] = { 0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D, 0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4 }; /* The next UUID has been found as well in https://bugs.launchpad.net/lpbugreporter/+bug/752542: 0xD3, 0x73, 0xD8, 0x7E, 0xD0, 0xC2, 0x4F, 0x4E, 0xA8, 0x54, 0x0F, 0x13, 0x17, 0xB0, 0x1C, 0x2C It looks like something for Intel GPU: http://lxr.linux.no/#linux+v3.1.5/drivers/gpu/drm/i915/intel_acpi.c */ #define DSM_TYPE_UNSUPPORTED 0 #define DSM_TYPE_OPTIMUS 1 #define DSM_TYPE_NVIDIA 2 static int dsm_type = DSM_TYPE_UNSUPPORTED; static struct pci_dev *dis_dev; static acpi_handle dis_handle; /* whether the card was off before suspend or not; on: 0, off: 1 */ static int dis_before_suspend_disabled; static char *buffer_to_string(const char *buffer, size_t n, char *target) { int i; for (i=0; itype == ACPI_TYPE_INTEGER && result) { *result = obj->integer.value; } else if (obj->type == ACPI_TYPE_BUFFER) { if (obj->buffer.length == 4 && result) { *result = 0; *result |= obj->buffer.pointer[0]; *result |= (obj->buffer.pointer[1] << 8); *result |= (obj->buffer.pointer[2] << 16); *result |= (obj->buffer.pointer[3] << 24); } } else { pr_warn("_DSM call yields an unsupported result type: %#x\n", obj->type); } kfree(output.pointer); return 0; } // Returns 1 if a _DSM function and its function index exists and 0 otherwise static int has_dsm_func(const char muid[16], int revid, int sfnc) { u32 result = 0; // fail if the _DSM call failed if (acpi_call_dsm(dis_handle, muid, revid, 0, 0, &result)) return 0; // ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. If // the n-th bit is enabled, function n is supported return result & 1 && result & (1 << sfnc); } static int bbswitch_optimus_dsm(void) { if (dsm_type == DSM_TYPE_OPTIMUS) { char args[] = {1, 0, 0, 3}; u32 result = 0; if (acpi_call_dsm(dis_handle, acpi_optimus_dsm_muid, 0x100, 0x1A, args, &result)) { // failure return 1; } pr_debug("Result of Optimus _DSM call: %08X\n", result); } return 0; } static int bbswitch_acpi_off(void) { if (dsm_type == DSM_TYPE_NVIDIA) { char args[] = {2, 0, 0, 0}; u32 result = 0; if (acpi_call_dsm(dis_handle, acpi_nvidia_dsm_muid, 0x102, 0x3, args, &result)) { // failure return 1; } pr_debug("Result of _DSM call for OFF: %08X\n", result); } return 0; } static int bbswitch_acpi_on(void) { if (dsm_type == DSM_TYPE_NVIDIA) { char args[] = {1, 0, 0, 0}; u32 result = 0; if (acpi_call_dsm(dis_handle, acpi_nvidia_dsm_muid, 0x102, 0x3, args, &result)) { // failure return 1; } pr_debug("Result of _DSM call for ON: %08X\n", result); } return 0; } // Returns 1 if the card is disabled, 0 if enabled static int is_card_disabled(void) { u32 cfg_word; // read first config word which contains Vendor and Device ID. If all bits // are enabled, the device is assumed to be off pci_read_config_dword(dis_dev, 0, &cfg_word); // if one of the bits is not enabled (the card is enabled), the inverted // result will be non-zero and hence logical not will make it 0 ("false") return !~cfg_word; } static void bbswitch_off(void) { if (is_card_disabled()) return; // to prevent the system from possibly locking up, don't disable the device // if it's still in use by a driver (i.e. nouveau or nvidia) if (dis_dev->driver) { pr_warn("device %s is in use by driver '%s', refusing OFF\n", dev_name(&dis_dev->dev), dis_dev->driver->name); return; } pr_info("disabling discrete graphics\n"); if (bbswitch_optimus_dsm()) { pr_warn("Optimus ACPI call failed, the device is not disabled\n"); return; } pci_save_state(dis_dev); pci_clear_master(dis_dev); pci_disable_device(dis_dev); do { struct acpi_device *ad = NULL; int r; r = acpi_bus_get_device(dis_handle, &ad); if (r || !ad) { pr_warn("Cannot get ACPI device for PCI device\n"); break; } if (ad->power.state == ACPI_STATE_UNKNOWN) { pr_debug("ACPI power state is unknown, forcing D0\n"); ad->power.state = ACPI_STATE_D0; } } while (0); pci_set_power_state(dis_dev, PCI_D3cold); if (bbswitch_acpi_off()) pr_warn("The discrete card could not be disabled by a _DSM call\n"); } static void bbswitch_on(void) { if (!is_card_disabled()) return; pr_info("enabling discrete graphics\n"); if (bbswitch_acpi_on()) pr_warn("The discrete card could not be enabled by a _DSM call\n"); pci_set_power_state(dis_dev, PCI_D0); pci_restore_state(dis_dev); if (pci_enable_device(dis_dev)) pr_warn("failed to enable %s\n", dev_name(&dis_dev->dev)); pci_set_master(dis_dev); } /* power bus so we can read PCI configuration space */ static void dis_dev_get(void) { if (dis_dev->bus && dis_dev->bus->self) pm_runtime_get_sync(&dis_dev->bus->self->dev); } static void dis_dev_put(void) { if (dis_dev->bus && dis_dev->bus->self) pm_runtime_put_sync(&dis_dev->bus->self->dev); } static ssize_t bbswitch_proc_write(struct file *fp, const char __user *buff, size_t len, loff_t *off) { char cmd[8]; if (len >= sizeof(cmd)) len = sizeof(cmd) - 1; if (copy_from_user(cmd, buff, len)) return -EFAULT; dis_dev_get(); if (strncmp(cmd, "OFF", 3) == 0) bbswitch_off(); if (strncmp(cmd, "ON", 2) == 0) bbswitch_on(); dis_dev_put(); return len; } static int bbswitch_proc_show(struct seq_file *seqfp, void *p) { // show the card state. Example output: 0000:01:00:00 ON dis_dev_get(); seq_printf(seqfp, "%s %s\n", dev_name(&dis_dev->dev), is_card_disabled() ? "OFF" : "ON"); dis_dev_put(); return 0; } static int bbswitch_proc_open(struct inode *inode, struct file *file) { return single_open(file, bbswitch_proc_show, NULL); } static int bbswitch_pm_handler(struct notifier_block *nbp, unsigned long event_type, void *p) { switch (event_type) { case PM_HIBERNATION_PREPARE: case PM_SUSPEND_PREPARE: dis_dev_get(); dis_before_suspend_disabled = is_card_disabled(); // enable the device before suspend to avoid the PCI config space from // being saved incorrectly if (dis_before_suspend_disabled) bbswitch_on(); dis_dev_put(); break; case PM_POST_HIBERNATION: case PM_POST_SUSPEND: case PM_POST_RESTORE: // after suspend, the card is on, but if it was off before suspend, // disable it again if (dis_before_suspend_disabled) { dis_dev_get(); bbswitch_off(); dis_dev_put(); } break; case PM_RESTORE_PREPARE: // deliberately don't do anything as it does not occur before suspend // nor hibernate, but before restoring a saved image. In that case, // either PM_POST_HIBERNATION or PM_POST_RESTORE will be called break; } return 0; } static struct file_operations bbswitch_fops = { .open = bbswitch_proc_open, .read = seq_read, .write = bbswitch_proc_write, .llseek = seq_lseek, .release= single_release }; static struct notifier_block nb = { .notifier_call = &bbswitch_pm_handler }; static int __init bbswitch_init(void) { struct proc_dir_entry *acpi_entry; struct pci_dev *pdev = NULL; acpi_handle igd_handle = NULL; pr_info("version %s\n", BBSWITCH_VERSION); while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) { struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_handle handle; int pci_class = pdev->class >> 8; if (pci_class != PCI_CLASS_DISPLAY_VGA && pci_class != PCI_CLASS_DISPLAY_3D) continue; #ifdef ACPI_HANDLE /* since Linux 3.8 */ handle = ACPI_HANDLE(&pdev->dev); #else /* removed since Linux 3.13 */ handle = DEVICE_ACPI_HANDLE(&pdev->dev); #endif if (!handle) { pr_warn("cannot find ACPI handle for VGA device %s\n", dev_name(&pdev->dev)); continue; } acpi_get_name(handle, ACPI_FULL_PATHNAME, &buf); if (pdev->vendor == PCI_VENDOR_ID_INTEL) { igd_handle = handle; pr_info("Found integrated VGA device %s: %s\n", dev_name(&pdev->dev), (char *)buf.pointer); } else { dis_dev = pdev; dis_handle = handle; pr_info("Found discrete VGA device %s: %s\n", dev_name(&pdev->dev), (char *)buf.pointer); } kfree(buf.pointer); } if (dis_dev == NULL) { pr_err("No discrete VGA device found\n"); return -ENODEV; } if (!skip_optimus_dsm && has_dsm_func(acpi_optimus_dsm_muid, 0x100, 0x1A)) { dsm_type = DSM_TYPE_OPTIMUS; pr_info("detected an Optimus _DSM function\n"); } else if (has_dsm_func(acpi_nvidia_dsm_muid, 0x102, 0x3)) { dsm_type = DSM_TYPE_NVIDIA; pr_info("detected a nVidia _DSM function\n"); } else { /* At least two Acer machines are known to use the intel ACPI handle * with the legacy nvidia DSM */ dis_handle = igd_handle; if (dis_handle && has_dsm_func(acpi_nvidia_dsm_muid, 0x102, 0x3)) { dsm_type = DSM_TYPE_NVIDIA; pr_info("detected a nVidia _DSM function on the" " integrated video card\n"); } else { pr_err("No suitable _DSM call found.\n"); return -ENODEV; } } acpi_entry = proc_create("bbswitch", 0664, acpi_root_dir, &bbswitch_fops); if (acpi_entry == NULL) { pr_err("Couldn't create proc entry\n"); return -ENOMEM; } dis_dev_get(); if (!is_card_disabled()) { /* We think the card is enabled, so ensure the kernel does as well */ if (pci_enable_device(dis_dev)) pr_warn("failed to enable %s\n", dev_name(&dis_dev->dev)); } if (load_state == CARD_ON) bbswitch_on(); else if (load_state == CARD_OFF) bbswitch_off(); pr_info("Succesfully loaded. Discrete card %s is %s\n", dev_name(&dis_dev->dev), is_card_disabled() ? "off" : "on"); dis_dev_put(); register_pm_notifier(&nb); return 0; } static void __exit bbswitch_exit(void) { remove_proc_entry("bbswitch", acpi_root_dir); dis_dev_get(); if (unload_state == CARD_ON) bbswitch_on(); else if (unload_state == CARD_OFF) bbswitch_off(); pr_info("Unloaded. Discrete card %s is %s\n", dev_name(&dis_dev->dev), is_card_disabled() ? "off" : "on"); dis_dev_put(); if (nb.notifier_call) unregister_pm_notifier(&nb); } module_init(bbswitch_init); module_exit(bbswitch_exit); /* vim: set sw=4 ts=4 et: */ bbswitch-0.8/dkms/000077500000000000000000000000001224773443600141405ustar00rootroot00000000000000bbswitch-0.8/dkms/dkms.conf000066400000000000000000000003221224773443600157420ustar00rootroot00000000000000PACKAGE_NAME="bbswitch" PACKAGE_VERSION="#MODULE_VERSION#" MAKE[0]="make KVERSION=$kernelver" CLEAN="make clean" BUILT_MODULE_NAME[0]="bbswitch" DEST_MODULE_LOCATION[0]="/kernel/drivers/acpi" AUTOINSTALL="yes"