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* x86/platform/goldfish: Prevent unconditional loadingThomas Gleixner2017-02-152-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The goldfish platform code registers the platform device unconditionally which causes havoc in several ways if the goldfish_pdev_bus driver is enabled: - Access to the hardcoded physical memory region, which is either not available or contains stuff which is completely unrelated. - Prevents that the interrupt of the serial port can be requested - In case of a spurious interrupt it goes into a infinite loop in the interrupt handler of the pdev_bus driver (which needs to be fixed seperately). Add a 'goldfish' command line option to make the registration opt-in when the platform is compiled in. I'm seriously grumpy about this engineering trainwreck, which has seven SOBs from Intel developers for 50 lines of code. And none of them figured out that this is broken. Impressive fail! Fixes: ddd70cf93d78 ("goldfish: platform device for x86") Reported-by: Gabriel C <nix.or.die@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: replace modulus operation with subtractionStephen Hemminger2017-02-141-3/+6
| | | | | | | | | Takes less clock cycles to check for ring wrap and subtract than to do a modulus instruction. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: constify parameters where possibleStephen Hemminger2017-02-143-21/+19
| | | | | | | | | Functions that just query state of ring buffer can have parameters marked const. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: expose hv_begin/end_readStephen Hemminger2017-02-143-24/+30
| | | | | | | | | In order to implement NAPI in netvsc, the driver needs access to control host interrupt mask. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: remove conditional locking of vmbus_writeStephen Hemminger2017-02-145-34/+9
| | | | | | | | | | All current usage of vmbus write uses the acquire_lock flag, therefore having it be optional is unnecessary. This also fixes a sparse warning since sparse doesn't like when a function has conditional locking. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: add direct isr callback modeStephen Hemminger2017-02-146-41/+55
| | | | | | | | | | | | | | Change the simple boolean batched_reading into a tri-value. For future NAPI support in netvsc driver, the callback needs to occur directly in interrupt handler. Batched mode is also changed to disable host interrupts immediately in interrupt routine (to avoid unnecessary host signals), and the tasklet is rescheduled if more data is detected. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: change to per channel taskletStephen Hemminger2017-02-147-96/+64
| | | | | | | | | | Make the event handling tasklet per channel rather than per-cpu. This allows for better fairness when getting lots of data on the same cpu. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: put related per-cpu variable togetherStephen Hemminger2017-02-145-134/+143
| | | | | | | | | | The hv_context structure had several arrays which were per-cpu and was allocating small structures (tasklet_struct). Instead use a single per-cpu array. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: callback is in softirq not workqueueStephen Hemminger2017-02-141-4/+1
| | | | | | | | The callback is done via tasklet not workqueue. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Add support for file-descriptor arraysMartijn Coenen2017-02-102-0/+165
| | | | | | | | | | | | | | | | | | This patch introduces a new binder_fd_array object, that allows us to support one or more file descriptors embedded in a buffer that is scatter-gathered. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Add support for scatter-gatherMartijn Coenen2017-02-102-13/+276
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously all data passed over binder needed to be serialized, with the exception of Binder objects and file descriptors. This patchs adds support for scatter-gathering raw memory buffers into a binder transaction, avoiding the need to first serialize them into a Parcel. To remain backwards compatibile with existing binder clients, it introduces two new command ioctls for this purpose - BC_TRANSACTION_SG and BC_REPLY_SG. These commands may only be used with the new binder_transaction_data_sg structure, which adds a field for the total size of the buffers we are scatter-gathering. Because memory buffers may contain pointers to other buffers, we allow callers to specify a parent buffer and an offset into it, to indicate this is a location pointing to the buffer that we are fixing up. The kernel will then take care of fixing up the pointer to that buffer as well. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> [jstultz: Fold in small fix from Amit Pundir <amit.pundir@linaro.org>] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Add extra size to allocatorMartijn Coenen2017-02-101-13/+28
| | | | | | | | | | | | | | | | | | | | | The binder_buffer allocator currently only allocates space for the data and offsets buffers of a Parcel. This change allows for requesting an additional chunk of data in the buffer, which can for example be used to hold additional meta-data about the transaction (eg a security context). Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Refactor binder_transact()Martijn Coenen2017-02-101-137/+172
| | | | | | | | | | | | | | | | | | Moved handling of fixup for binder objects, handles and file descriptors into separate functions. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Support multiple /dev instancesMartijn Coenen2017-02-102-11/+84
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new module parameter 'devices', that can be used to specify the names of the binder device nodes we want to populate in /dev. Each device node has its own context manager, and is therefore logically separated from all the other device nodes. The config option CONFIG_ANDROID_BINDER_DEVICES can be used to set the default value of the parameter. This approach was favored over using IPC namespaces, mostly because we require a single process to be a part of multiple binder contexts, which seemed harder to achieve with namespaces. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> [jstultz: minor checkpatch warning fix] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Deal with contexts in debugfsMartijn Coenen2017-02-101-13/+23
| | | | | | | | | | | | | | | | Properly print the context in debugfs entries. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Support multiple context managersMartijn Coenen2017-02-101-21/+38
| | | | | | | | | | | | | | | | | | | Move the context manager state into a separate struct context, and allow for each process to have its own context associated with it. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> [jstultz: Minor checkpatch fix] Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* binder: Split flat_binder_objectMartijn Coenen2017-02-102-52/+137
| | | | | | | | | | | | | | | | | | | | | | | | flat_binder_object is used for both handling binder objects and file descriptors, even though the two are mostly independent. Since we'll have more fixup objects in binder in the future, instead of extending flat_binder_object again, split out file descriptors to their own object while retaining backwards compatibility to existing user-space clients. All binder objects just share a header. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Martijn Coenen <maco@google.com> Cc: Arve Hjønnevåg <arve@android.com> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Serban Constantinescu <serban.constantinescu@arm.com> Cc: Dmitry Shmidt <dimitrysh@google.com> Cc: Rom Lemarchand <romlem@google.com> Cc: Android Kernel Team <kernel-team@android.com> Signed-off-by: Martijn Coenen <maco@google.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* auxdisplay: ht16k33: remove private workqueueDmitry Torokhov2017-02-101-15/+5
| | | | | | | | | | There is no need for the driver to use private workqueue, standard system workqueue should suffice as they are going to use the same worker pool anyway. Acked-by: Robin van der Gracht <robin@protonic.nl> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* auxdisplay: ht16k33: rework input device initializationDmitry Torokhov2017-02-101-153/+145
| | | | | | | | | | | | | | | | | | | | This patch fixes following issues in input device (keypad) handling: - requesting IRQ before allocating and initializing parts of the device that can be referenced from IRQ handler is racy, even if we try to disable interrupt after requesting it. Let's move allocations around so that everything is ready by the time we request IRQ. - using threaded interrupt handler to schedule a work item it sub-optimal. Disabling and then re-enabling interrupts in work item and in open/close methods is prone to races and exactly the reason theraded interrupts were introduced. Let's use the infrastructure properly and keep scanning the matrix array in IRQ thread, stopping when there are no keys, or when told to do so. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Tested-by: Robin van der Gracht <robin@protonic.nl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* auxdisplay: ht16k33: do not try to free fbdevDmitry Torokhov2017-02-101-3/+1
| | | | | | | | | 'fbdev' is allocated as part of larger ht16k33_priv structure; trying to free it will cause troubles. Acked-by: Robin van der Gracht <robin@protonic.nl> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers: hv: Turn off write permission on the hypercall pageK. Y. Srinivasan2017-02-101-1/+1
| | | | | | | | | | | | The hypercall page only needs to be executable but currently it is setup to be writable as well. Fix the issue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: <stable@vger.kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Reported-by: Stephen Hemminger <stephen@networkplumber.org> Tested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: remove unused kickq argument to sendpacketStephen Hemminger2017-02-103-32/+14
| | | | | | | | | Since sendpacket no longer uses kickq argument remove it. Remove it no longer used xmit_more in sendpacket in netvsc as well. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: remove no longer used signal_policyStephen Hemminger2017-02-101-18/+0
| | | | | | | | | The explicit signal policy is no longer used. A different mechanism will be added later when xmit_more is supported. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: drop no longer used kick_q argumentStephen Hemminger2017-02-103-17/+9
| | | | | | | | | | | The flag to cause notification of host is unused after commit a01a291a282f7c2e ("Drivers: hv: vmbus: Base host signaling strictly on the ring state"). Therefore remove it from the ring buffer internal API. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* vmbus: use kernel bitops for traversing interrupt maskStephen Hemminger2017-02-104-54/+29
| | | | | | | | | | Use standard kernel operations for find first set bit to traverse the channel bit array. This has added benefit of speeding up lookup on 64 bit and because it uses find first set instruction. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: util: Fix a typoK. Y. Srinivasan2017-02-101-1/+1
| | | | | | | Fix a typo. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hv_utils: implement Hyper-V PTP sourceVitaly Kuznetsov2017-02-101-27/+152
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With TimeSync version 4 protocol support we started updating system time continuously through the whole lifetime of Hyper-V guests. Every 5 seconds there is a time sample from the host which triggers do_settimeofday[64](). While the time from the host is very accurate such adjustments may cause issues: - Time is jumping forward and backward, some applications may misbehave. - In case an NTP server runs in parallel and uses something else for time sync (network, PTP,...) system time will never converge. - Systemd starts annoying you by printing "Time has been changed" every 5 seconds to the system log. Instead of doing in-kernel time adjustments offload the work to an NTP client by exposing TimeSync messages as a PTP device. Users may now decide what they want to use as a source. I tested the solution with chrony, the config was: refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0 The result I'm seeing is accurate enough, the time delta between the guest and the host is almost always within [-10us, +10us], the in-kernel solution was giving us comparable results. I also tried implementing PPS device instead of PTP by using not currently used Hyper-V synthetic timers (we use only one of four for clockevent) but with PPS source only chrony wasn't able to give me the required accuracy, the delta often more that 100us. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hv: export current Hyper-V clocksourceVitaly Kuznetsov2017-02-102-4/+12
| | | | | | | | | | As a preparation to implementing Hyper-V PTP device supporting .getcrosststamp we need to export a reference to the current Hyper-V clocksource in use (MSR or TSC page). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: Fix the bug in generating the guest IDK. Y. Srinivasan2017-02-101-2/+2
| | | | | | | | | Fix the bug in the generation of the guest ID. Without this fix the host side telemetry code is broken. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Fixes: 352c9624242d ("Drivers: hv: vmbus: Move the definition of generate_guest_id()") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Abstract temporary backlight handlingGeert Uytterhoeven2017-02-101-41/+60
| | | | | | | | | | | | | | | Currently the periodic scan timer is used for three purposes, entangling keypad and display handling, which are both optional: 1. Scanning the keypad, 2. Flashing the backlight when a key is pressed, 3. Disabling temporary backlighting after a fixed period of time. Abstract the second purpose using a new lcd_poke() function. Make the non-periodic temporary backlight handling independent from keypad handling by converting it to a delayed workqueue. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Add lcd_home() helperGeert Uytterhoeven2017-02-101-24/+15
| | | | | | | | Add a helper function to move the cursor to the home position, so callers no longer need access to internal state. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Remove always-true check from panel_detach()Geert Uytterhoeven2017-02-101-16/+14
| | | | | | | panel_detach() already verified that pptr is a valid pointer. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Move all suboptions into a big if sectionGeert Uytterhoeven2017-02-101-18/+19
| | | | | | | | | | | All 18 suboptions related to the panel driver have individual dependencies on PANEL. Replace them by a single "if PANEL / endif # PANEL" section for easier dependency management. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Remove reference to misc device supportGeert Uytterhoeven2017-02-101-4/+3
| | | | | | | | | As of commit 7c5763b8453a9487 ("drivers: misc: Remove MISC_DEVICES config option"), misc device support no longer needs to be enabled manually. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Remove unused LCD_FLAG_S and LCD_FLAG_IDGeert Uytterhoeven2017-02-101-2/+0
| | | | | | | | These definitions were never used in any publicly available version since (at least) 2004. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Remove PANEL_VERSIONGeert Uytterhoeven2017-02-101-12/+6
| | | | | | | Hardcoded driver versions are so pre-git. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* misc: panel: Fix LCD_FLAG_F/LCD_FLAG_N exchangeGeert Uytterhoeven2017-02-101-2/+3
| | | | | | | LCD_FLAG_F is the font flag, LCD_FLAG_N is the two-lines flag. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: ds2405: use module_w1_family to simplify the codeWei Yongjun2017-02-101-12/+1
| | | | | | | | | module_w1_family() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: ds2490: use kmemdup rather than duplicating its implementationWei Yongjun2017-02-101-2/+1
| | | | | | | | | | Use kmemdup rather than duplicating its implementation. Generated by: scripts/coccinelle/api/memdup.cocci Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga zynq: Use the scatterlist interfaceJason Gunthorpe2017-02-101-39/+135
| | | | | | | | | | | | | This allows the driver to avoid a high order coherent DMA allocation and memory copy. With this patch it can DMA directly from the kernel pages that the bitfile is stored in. Since this is now a gather DMA operation the driver uses the ISR to feed the chips DMA queue with each entry from the SGL. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga: Add scatterlist based programmingJason Gunthorpe2017-02-103-33/+227
| | | | | | | | | | | | | | | | | | | | | | Requiring contiguous kernel memory is not a good idea, this is a limited resource and allocation can fail under normal work loads. This introduces a .write_sg op that supporting drivers can provide to DMA directly from dis-contiguous memory and a new entry point fpga_mgr_buf_load_sg that users can call to directly provide page lists. The full matrix of compatibility is provided, either the linear or sg interface can be used by the user with a driver supporting either interface. A notable change for drivers is that the .write op can now be called multiple times. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by: Alan Tull <atull@opensource.altera.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga zynq: Check the bitstream for validityJason Gunthorpe2017-02-101-0/+21
| | | | | | | | | | | | | | | | | | | | | | There is no sense in sending a bitstream we know will not work, and with the variety of options for bitstream generation in Xilinx tools it is not terribly clear what the correct input should be. This is particularly important for Zynq since auto-correction was removed from the driver and the Zynq hardware only accepts a bitstream format that is different from what the Xilinx tools typically produce. Worse, the hardware provides no indication why the bitstream fails, it simply times out if the input is wrong. The best option here is to have the kernel print a message informing the user they are using a malformed bistream and programming failure isn't for any of the myriad of other reasons. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Acked-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* fpga zynq: Check for errors after completing DMAJason Gunthorpe2017-02-101-22/+32
| | | | | | | | | | | | | | | The completion did not check the interrupt status to see if any error bits were asserted, check error bits and dump some registers if things went wrong. A few fixes are needed to make this work, the IXR_ERROR_FLAGS_MASK was wrong, it included the done bits, which shows a bug in mask/unmask_irqs which were using the wrong bits, simplify all of this stuff. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com> Acked-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: remove support for broken parallel readAlexander Usyskin2017-02-101-22/+26
| | | | | | | | | | | | | Parallel reads from multiple threads on a file descriptor are not well defined and racy. It is safer to return to original behavior and simply fail the additional read. The solution is to remove request for next read credit. Cc: <stable@vger.kernel.org> #4.9 Fixes: ff1586a7ea57 ("mei: enqueue consecutive reads") Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/fsi: add driver to device matchesJeremy Kerr2017-02-102-2/+40
| | | | | | | | Driver bind to devices based on the engine types & (optional) versions. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/fsi: Add device & driver definitionsJeremy Kerr2017-02-101-0/+11
| | | | | | | | | Add structs for fsi devices & drivers, and struct device conversion functions. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/fsi: Add empty fsi bus definitionsJeremy Kerr2017-02-106-0/+77
| | | | | | | | | This change adds the initial (empty) fsi bus definition, and introduces drivers/fsi/. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge 4.10-rc7 into char-misc-nextGreg Kroah-Hartman2017-02-06730-4321/+6986
|\ | | | | | | | | | | | | We want the hv and other fixes in here as well to handle merge and testing issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * Linux 4.10-rc7v4.10-rc7Linus Torvalds2017-02-051-1/+1
| |
| * Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds2017-02-044-14/+50
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: - Prevent double activation of interrupt lines, which causes problems on certain interrupt controllers - Handle the fallout of the above because x86 (ab)uses the activation function to reconfigure interrupts under the hood. * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Make irq activate operations symmetric irqdomain: Avoid activating interrupts more than once
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