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* Merge tag 'char-misc-4.10-rc1' of ↵Linus Torvalds2016-12-131-3/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here's the big char/misc driver patches for 4.10-rc1. Lots of tiny changes over lots of "minor" driver subsystems, the largest being some new FPGA drivers. Other than that, a few other new drivers, but no new driver subsystems added for this kernel cycle, a nice change. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (107 commits) uio-hv-generic: store physical addresses instead of virtual Tools: hv: kvp: configurable external scripts path uio-hv-generic: new userspace i/o driver for VMBus vmbus: add support for dynamic device id's hv: change clockevents unbind tactics hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels() hyperv: Fix spelling of HV_UNKOWN mei: bus: enable non-blocking RX mei: fix the back to back interrupt handling mei: synchronize irq before initiating a reset. VME: Remove shutdown entry from vme_driver auxdisplay: ht16k33: select framebuffer helper modules MAINTAINERS: add git url for fpga fpga: Clarify how write_init works streaming modes fpga zynq: Fix incorrect ISR state on bootup fpga zynq: Remove priv->dev fpga zynq: Add missing \n to messages fpga: Add COMPILE_TEST to all drivers uio: pruss: add clk_disable() char/pcmcia: add some error checking in scr24x_read() ...
| * thunderbolt: Macro renameAmir Levy2016-11-091-3/+3
| | | | | | | | | | | | | | | | | | | | This first patch updates the NHI Thunderbolt controller registers file to reflect that it is not only for Cactus Ridge. No functional change intended. Signed-off-by: Amir Levy <amir.jer.levy@intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | thunderbolt: Compile on x86 onlyLukas Wunner2016-11-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far Thunderbolt is (unfortunately) an Intel proprietary technology that is only available on x86, so compiling on other arches is pointless except for testing purposes. Amend Kconfig accordingly. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lukas Wunner <lukas@wunner.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Andreas Noever <andreas.noever@gmail.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/7dfda728d3ee8a33c80c49b224da7359c6015eea.1479456179.git.lukas@wunner.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | thunderbolt, efi: Fix Kconfig dependencies harderLukas Wunner2016-11-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit c9cc3aaa0281 ("thunderbolt: Use Device ROM retrieved from EFI"), the THUNDERBOLT config option selects APPLE_PROPERTIES. This broke the build for certain configs because APPLE_PROPERTIES is located in a menu which depends on EFI: If EFI is not enabled, the prerequisites needed for APPLE_PROPERTIES are not selected: Those are EFI_DEV_PATH_PARSER and UCS2_STRING. Additionally EFI_DEV_PATH_PARSER won't compile unless ACPI is enabled. Commit 79f9cd35b05e ("thunderbolt, efi: Fix Kconfig dependencies") sought to fix the breakage by making THUNDERBOLT select APPLE_PROPERTIES only if EFI_STUB is enabled. On x86, EFI_STUB depends on EFI and EFI depends on ACPI, so this fixed the build at least on this architecture. However on arm and arm64, EFI_STUB does not depend on EFI, so once again the prerequisites needed for APPLE_PROPERTIES are not selected. Additionally ACPI is not available on arm and optional on arm64, therefore EFI_DEV_PATH_PARSER won't compile. Fix by selecting APPLE_PROPERTIES only on x86. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lukas Wunner <lukas@wunner.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Andreas Noever <andreas.noever@gmail.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/5c241cf92eb1dc2421218c1204c6a9d22c9f847b.1479456179.git.lukas@wunner.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | thunderbolt, efi: Fix Kconfig dependenciesLukas Wunner2016-11-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix this EFI build failure on certain (rand)configs: drivers/firmware/efi/apple-properties.c:149:9: error: implicit declaration of function ???efi_get_device_by_path??? [-Werror=implicit-function-declaration] which is due to: warning: (THUNDERBOLT) selects APPLE_PROPERTIES which has unmet direct dependencies (EFI && EFI_STUB && X86) Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Andreas Noever <andreas.noever@gmail.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Pedro Vilaça <reverser@put.as> Cc: Peter Jones <pjones@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Pierre Moreau <pierre.morrow@free.fr> [MacBookPro11,3] Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20161114151033.GA10141@wunner.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | thunderbolt: Use Device ROM retrieved from EFILukas Wunner2016-11-133-1/+45
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Macs with Thunderbolt 1 do not have a unit-specific DROM: The DROM is empty with uid 0x1000000000000. (Apple started factory-burning a unit- specific DROM with Thunderbolt 2.) Instead, the NHI EFI driver supplies a DROM in a device property. Use it if available. It's only available when booting with the efistub. If it's not available, silently fall back to our hardcoded DROM. The size of the DROM is always 256 bytes. The number is hardcoded into the NHI EFI driver. This commit can deal with an arbitrary size however, just in case they ever change that. Background information: The EFI firmware volume contains ROM files for the NHI, GMUX and several other chips as well as key material. This strategy allows Apple to deploy ROM or key updates by simply publishing an EFI firmware update on their website. Drivers do not access those files directly but rather through a file server via EFI protocol AC5E4829-A8FD-440B-AF33-9FFE013B12D8. Files are identified by GUID, the NHI DROM has 339370BD-CFC6-4454-8EF7-704653120818. The NHI EFI driver amends that file with a unit-specific uid. The uid has 64 bit but its entropy is much lower: 24 bit represent the model, 24 bit are taken from a serial number, 16 bit are fixed. The NHI EFI driver obtains the serial number via the DataHub protocol, copies it into the DROM, calculates the CRC and submits the result as a device property. A modification is needed in the resume code where we currently read the uid of all switches in the hierarchy to detect plug events that occurred during sleep. On Thunderbolt 1 root switches this will now lead to a mismatch between the uid of the empty DROM and the EFI DROM. Exempt the root switch from this check: It's built in, so the uid should never change. However we continue to *read* the uid of the root switch, this seems like a good way to test its reachability after resume. Tested-by: Lukas Wunner <lukas@wunner.de> [MacBookPro9,1] Tested-by: Pierre Moreau <pierre.morrow@free.fr> [MacBookPro11,3] Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Acked-by: Andreas Noever <andreas.noever@gmail.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pedro Vilaça <reverser@put.as> Cc: Peter Jones <pjones@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20161112213237.8804-10-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
* thunderbolt: Don't declare Falcon Ridge unsupportedLukas Wunner2016-08-311-1/+3
| | | | | | | | | | Falcon Ridge 4C has been supported by the driver from the beginning, Falcon Ridge 2C support was just added. Don't irritate users with a warning declaring the opposite. Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add support for INTEL_FALCON_RIDGE_2C controller.Xavier Gnata2016-08-311-0/+6
| | | | | | | | | | | | From: Xavier Gnata <xavier.gnata@gmail.com> Add support to INTEL_FALCON_RIDGE_2C controller and corresponding quirk to support suspend/resume. Tested against 4.7 master on a MacBook Air 11" 2015. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Reviewed-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Fix double free of drom bufferAndreas Noever2016-05-021-0/+1
| | | | | | | | | | | | | | | | If tb_drom_read() fails, sw->drom is freed but not set to NULL. sw->drom is then freed again in the error path of tb_switch_alloc(). The bug can be triggered by unplugging a thunderbolt device shortly after it is detected by the thunderbolt driver. Clear sw->drom if tb_drom_read() fails. [bhelgaas: add Fixes:, stable versions of interest] Fixes: 343fcb8c70d7 ("thunderbolt: Fix nontrivial endpoint devices.") Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.17+ CC: Lukas Wunner <lukas@wunner.de>
* thunderbolt: Support 1st gen Light Ridge controllerLukas Wunner2016-04-083-3/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for the 1st gen Light Ridge controller, which is built into these systems: iMac12,1 2011 21.5" iMac12,2 2011 27" Macmini5,1 2011 i5 2.3 GHz Macmini5,2 2011 i5 2.5 GHz Macmini5,3 2011 i7 2.0 GHz MacBookPro8,1 2011 13" MacBookPro8,2 2011 15" MacBookPro8,3 2011 17" MacBookPro9,1 2012 15" MacBookPro9,2 2012 13" Light Ridge (CV82524) was the very first copper Thunderbolt controller, introduced 2010 alongside its fiber-optic cousin Light Peak (CVL2510). Consequently the chip suffers from some teething troubles: - MSI is broken for hotplug signaling on the downstream bridges: The chip just never sends an interrupt. It requests 32 MSIs for each of its six bridges and the pcieport driver only allocates one per bridge. However I've verified that even if 32 MSIs are allocated there's no interrupt on hotplug. The only option is thus to disable MSI, which is also what OS X does. Apparently all Thunderbolt chips up to revision 1 of Cactus Ridge 4C are plagued by this issue so quirk those as well. - The chip supports a maximum hop_count of 32, unlike its successors which support only 12. Fixup ring_interrupt_active() to cope with values >= 32. - Another peculiarity is that the chip supports a maximum of 13 ports whereas its successors support 12. However the additional port (#5) seems to be unusable as reading its TB_CFG_PORT config space results in TB_CFG_ERROR_INVALID_CONFIG_SPACE. Add a quirk to mark the port disabled on the root switch, assuming that's necessary on all Macs using this chip. Tested-by: Lukas Wunner <lukas@wunner.de> [MacBookPro9,1] Tested-by: William Brown <william@blackhats.net.au> [MacBookPro8,2] Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Andreas Noever <andreas.noever@gmail.com>
* thunderbolt: Fix typos and magic numberLukas Wunner2016-04-086-10/+10
| | | | | | | | | | Fix typo in tb_cfg_print_error() message. Fix bytecount in struct tb_drom_entry_port comment. Replace magic number in tb_switch_alloc(). Rename tb_sw_set_unpplugged() and TB_CAL_IECS to fix typos. [bhelgaas: no functional change intended] Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Andreas Noever <andreas.noever@gmail.com>
* PCI: Add Intel Thunderbolt device IDsLukas Wunner2016-04-082-7/+10
| | | | | | | | | | Intel Gen 1 and 2 chips use the same ID for NHI, bridges and switch. Gen 3 chips and onward use a distinct ID for the NHI. No functional change intended. Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Andreas Noever <andreas.noever@gmail.com>
* thunderbolt: Allow loading of module on recent Apple MacBooks with ↵Knuth Posern2015-09-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | thunderbolt 2 controller The pci device ids listed in the thunderbolt driver are to restrictive, which prevents the driver from being loaded on recent Apple MacBooks using a thunderbolt 2 controller. In particular this prevented any hot-plugging functionality for thunderbolt based ethernet dongles (i.e. Apples thunderbolt gigabit ethernet broadcom tg3 based dongle Model A1433 EMC 2590). Changing the subvendor and subdevice to PCI_ANY_ID the thunderbolt driver loads and binds to the pci device 07:00.0 System peripheral: Intel Corporation Device 156c which is the thunderbolt 2 controller on the MacBookPro12,1. Successfully tested on MacBookPro12,1. With the patch the thunderbolt module gets now loaded on boot. And it provides hot-plugging support both for a cold-plugged and a warm-plugged ethernet dongle. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Acked-by: Knuth Posern <knuth@posern.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Clear hops before overwritingAndreas Noever2014-08-261-1/+20
| | | | | | | | | | | | | | | | | | Zero hops in tb_path_activate before writing a new path. This fixes the following scenario: - Boot with a coldplugged device - Unplug device - Plug device back in - PCI hotplug fails The hotplug operation fails because our new path matches the (now defunct) path which was setup by the firmware for the coldplugged device. By writing zeros before writing our path configuration we can force thunderbolt to retrain the path. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Use kcallocHimangi Saraogi2014-07-131-6/+4
| | | | | | | | | | | The advantage of kcalloc is, that will prevent integer overflows which could result from the multiplication of number of elements and size and it is also a bit nicer to read. Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Correct the size argument to devm_kzallocHimangi Saraogi2014-07-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | nhi->rx_rings does not have type as struct tb_ring *, as it is a double pointer so the elements of the array should have pointer type, not structure type. The Coccinelle semantic patch that makes this change is as follows: // <smpl> @disable sizeof_type_expr@ type T; T **x; @@ x = <+...sizeof( - T + *x )...+> // </smpl> Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Cc: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: select CRC32 in KconfigAndreas Noever2014-06-211-0/+1
| | | | | | | | We use __crc32c_le in ctl.c. So make sure that the dependency is there. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Make tb_eeprom_get_drom_offset staticAndreas Noever2014-06-201-1/+1
| | | | | | | tb_eeprom_get_drom_offset is local to this file. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Make enum tb_drom_entry_type unsignedAndreas Noever2014-06-201-1/+2
| | | | | | | | | Force enum tb_drom_entry_type to unsigned to fix the following error: drivers/thunderbolt/eeprom.c:202:39: error: dubious one-bit signed bitfield Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Fix header declaration of tb_find_capAndreas Noever2014-06-201-1/+1
| | | | | | | | tb_find_cap in cap.c takes an enum tb_cap and not an u32. Fix the declaration in tb.h. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add casts to prevent endianness warningsAndreas Noever2014-06-201-2/+2
| | | | | | | | | Thunderbolt packets are big endian. Cast pkg->buffer to __be32* when accessing the checksum. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: fix format string for size_tArnd Bergmann2014-06-201-1/+1
| | | | | | | | | | The result of "sizeof(struct tb_drom_entry_port)" is a size_t, which is not necessarily the same as 'long', so we should use the appropriate %z format string instead of %l. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: add PCI dependencyArnd Bergmann2014-06-201-1/+1
| | | | | | | | | | | The thunderbolt drivers cannot be built if CONFIG_PCI is disabled, better add an explicit Kconfig dependency. The "default no" line is redundant and can be removed at the same time. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Staticize nhi_idsSachin Kamat2014-06-201-1/+1
| | | | | | | | 'nhi_ids' is local to this file. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Use NULL instead of 0 in nhi.cSachin Kamat2014-06-201-1/+1
| | | | | | | | 'descriptors' is a pointer. Use NULL isntead of 0. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Use NULL instead of 0 in ctl.cSachin Kamat2014-06-201-2/+2
| | | | | | | | The function returns a pointer. Hence return NULL instead of 0. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Use NULL instead of 0 in switch.cSachin Kamat2014-06-201-3/+3
| | | | | | | | The function returns a pointer. Hence return NULL instead of 0. Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Fix build error in switch.cSachin Kamat2014-06-201-0/+1
| | | | | | | | | | Fixes the below error: drivers/thunderbolt/switch.c:347:2: error: implicit declaration of function ‘kzalloc’ [-Werror=implicit-function-declaration] drivers/thunderbolt/switch.c:381:2: error: implicit declaration of function ‘kcalloc’ [-Werror=implicit-function-declaration] Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Fix build error in eeprom.cSachin Kamat2014-06-201-0/+1
| | | | | | | | | | Fixes the below error: drivers/thunderbolt/eeprom.c:407:2: error: implicit declaration of function ‘kzalloc’ [-Werror=implicit-function-declaration] drivers/thunderbolt/eeprom.c:444:2: error: implicit declaration of function ‘kfree’ [-Werror=implicit-function-declaration] Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Acked-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Fix nontrivial endpoint devices.Andreas Noever2014-06-193-18/+31
| | | | | | | | | | | | | | | | | | | | Fix issues observed with the Startech docking station: Fix the type of the route parameter in tb_ctl_rx. It should be u64 and not u8 (which only worked for short routes). A thunderbolt cable contains two lanes. If both endpoints support it a connection will be established on both lanes. Previously we tried to scan below both "dual link ports". Use the information extracted from the drom to only scan behind ports with lane_nr == 0. Endpoints with more complex thunderbolt controllers have some of their ports disabled (for example the NHI port or one of the HDMI/DP ports). Accessing them results in an error so we now ignore ports which are marked as disabled in the drom. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Read port configuration from eeprom.Andreas Noever2014-06-193-7/+270
| | | | | | | | | | | | All Thunderbolt switches (except the root switch) contain a drom which contains information about the device. Right now we only read the UID. Add code to read and parse this drom. For now we are only interested in which ports are disabled and which ports are "dual link ports" (a physical thunderbolt port/socket contains two such ports). Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add suspend/hibernate supportAndreas Noever2014-06-194-0/+183
| | | | | | | | We use _noirq since we have to restore the pci tunnels before the pci core wakes the tunneled devices. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Read switch uid from EEPROMAndreas Noever2014-06-194-1/+198
| | | | | | | | Add eeprom access code and read the uid during switch initialization. The UID will be used to check device identity after suspend. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add support for simple pci tunnelsAndreas Noever2014-06-195-1/+399
| | | | | | | | | | | | A pci downstream and pci upstream port can be connected through a tunnel. To establish the tunnel we have to setup two unidirectional paths between the two ports. Right now we only support paths with two hops (i.e. no chaining) and at most one pci device per thunderbolt device. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add path setup code.Andreas Noever2014-06-194-1/+312
| | | | | | | | | | | A thunderbolt path is a unidirectional channel between two thunderbolt ports. Two such paths are needed to establish a pci tunnel. This patch introduces struct tb_path as well as a set of tb_path_* methods which are used to activate & deactivate paths. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Handle hotplug eventsAndreas Noever2014-06-193-2/+89
| | | | | | | | | We receive a plug event callback whenever a thunderbolt device is added or removed. This patch fills in the tb_handle_hotplug method and starts reacting to these events by adding/removing switches from the hierarchy. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Scan for downstream switchesAndreas Noever2014-06-193-0/+157
| | | | | | | | Add utility methods tb_port_state and tb_wait_for_port. Add tb_scan_switch which recursively checks for downstream switches. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Enable plug eventsAndreas Noever2014-06-192-0/+53
| | | | | | | | | Thunderbolt switches have a plug events capability. This patch adds the tb_plug_events_active method and uses it to activate plug events during switch allocation. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add thunderbolt capability handlingAndreas Noever2014-06-193-1/+119
| | | | | | | | | Thunderbolt config areas contain capability lists similar to those found on pci devices. This patch introduces a tb_find_cap utility method to search for capabilities. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Initialize root switch and portsAndreas Noever2014-06-194-1/+333
| | | | | | | | This patch adds the structures tb_switch and tb_port as well as code to initialize the root switch. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add tb_regs.hAndreas Noever2014-06-192-0/+218
| | | | | | | | | | | | Every thunderbolt device consists (logically) of a switch with multiple ports. Every port contains up to four config regions (HOPS, PORT, SWITCH, COUNTERS) which are used to configure the device. The tb_regs.h file contains all known registers and capabilities from these config regions. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Setup control channelAndreas Noever2014-06-194-3/+186
| | | | | | | | | | | | Add struct tb which will contain our view of the thunderbolt bus. For now it just contains a pointer to the control channel and a workqueue for hotplug events. Add thunderbolt_alloc_and_start() and thunderbolt_shutdown_and_free() which are responsible for setup and teardown of struct tb. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add control channel interfaceAndreas Noever2014-06-193-1/+807
| | | | | | | | | | | | Thunderbolt devices are configured by reading/writing into their configuration space (similar to pci). This is done by sending packets through the NHI (native host interface) onto the control channel. This patch handles the low level packet based protocol and exposes higher level operations like tb_cfg_read/tb_cfg_write. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* thunderbolt: Add initial cactus ridge NHI supportAndreas Noever2014-06-195-0/+860
Thunderbolt hotplug is supposed to be handled by the firmware. But Apple decided to implement thunderbolt at the operating system level. The firmare only initializes thunderbolt devices that are present at boot time. This driver enables hotplug of thunderbolt of non-chained thunderbolt devices on Apple systems with a cactus ridge controller. This first patch adds the Kconfig file as well the parts of the driver which talk directly to the hardware (that is pci device setup, interrupt handling and RX/TX ring management). Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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