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path: root/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
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2018-01-18fm10k: mark PM functions as __maybe_unusedArnd Bergmann1-7/+2
A cleanup of the PM code left an incorrect #ifdef in place, leading to a harmless build warning: drivers/net/ethernet/intel/fm10k/fm10k_pci.c:2502:12: error: 'fm10k_suspend' defined but not used [-Werror=unused-function] drivers/net/ethernet/intel/fm10k/fm10k_pci.c:2475:12: error: 'fm10k_resume' defined but not used [-Werror=unused-function] It's easier to use __maybe_unused attributes here, since you can't pick the wrong one. Fixes: 8249c47c6ba4 ("fm10k: use generic PM hooks instead of legacy PCIe power hooks") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-18ethernet/intel: Convert timers to use timer_setup()Kees Cook1-4/+4
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Switches test of .data field to .function, since .data will be going away. Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-03fm10k: prefer %s and __func__ for diagnostic printsJacob Keller1-2/+16
Don't hard code the function names in the diagnostic output when these reset related routines fail. Instead, use %s and __func__ so that future refactors don't need to change the print outs. Additionally, while we are here, add missing function header comments for the new reset_prepare and reset_done function handlers. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-03fm10k: introduce a message queue for MAC/VLAN messagesJacob Keller1-0/+201
Under some circumstances, when dealing with a large number of MAC address or VLAN updates at once, the fm10k driver, particularly the VFs can overload the mailbox with too many messages at once. This results in a mailbox timeout, which causes the driver to initiate a reset. During the reset, we re-send all the same messages that originally caused the timeout. This results in a cycle of resets each triggering a future reset. To fix or avoid this, we introduce a workqueue item which monitors a queue of MAC and VLAN requests. These requests are queued to the end of the list, and we process as a FIFO periodically. Initially we only handle requests for the netdev, but we do handle unicast MAC addresses, multicast MAC addresses, and update VLAN requests. A future patch will add support to use this queue for handling MAC update requests from the VF<->PF mailbox. The MAC/VLAN work item will keep checking to make sure that each request does not overflow the mailbox and cause a timeout. If it might, then the work item will reschedule itself a short time later. This avoids any reset cycle, since we never send the message if the mailbox is not ready. As an alternative, we tried increasing the mailbox message FIFO, but this just delays the problem and results in needless memory waste on the system. Our new message queue is dynamically allocated so only uses as much memory as it needs. Additionally, it need not be contiguous like the Tx and Rx FIFOs. Note that this patch chose to only create a queue for MAC and VLAN messages, since these are the only messages sent in a large enough volume to cause the reset loop. Other messages are very unlikely to overflow the mailbox Tx FIFO so easily. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-03fm10k: use generic PM hooks instead of legacy PCIe power hooksJacob Keller1-45/+22
Replace the PCI specific legacy power management hooks with the new generic power management hooks which work properly for both suspend and hibernate. The new generic system is better and properly handles the lower level PCIe power management rather than forcing the driver to handle it. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-03fm10k: use spinlock to implement mailbox lockJacob Keller1-0/+3
Lets not re-invent the locking wheel. Remove our bitlock and use a proper spinlock instead. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-03fm10k: prepare_for_reset() when we lose PCIe LinkJacob Keller1-26/+77
If we lose PCIe link, such as when an unannounced PFLR event occurs, or when a device is surprise removed, we currently detach the device and close the netdev. This unfortunately leaves a lot of things still active, such as the msix_mbx_pf IRQ, and Tx/Rx resources. This can cause problems because the register reads will return potentially invalid values which may result in unknown driver behavior. Begin the process of resetting using fm10k_prepare_for_reset(), much in the same way as the suspend and resume cycle does. This will attempt to shutdown as much as possible, in order to prevent possible issues. A naive implementation for this has issues, because there are now multiple flows calling the reset logic and setting a reset bit. This would cause problems, because the "re-attach" routine might call fm10k_handle_reset() prior to the reset actually finishing. Instead, we'll add state bits to indicate which flow actually initiated the reset. For the general reset flow, we'll assume that if someone else is resetting that we do not need to handle it at all, so it does not need its own state bit. For the suspend case, we will simply issue a warning indicating that we are attempting to recover from this case when resuming. For the detached subtask, we'll simply refuse to re-attach until we've actually initiated a reset as part of that flow. Finally, we'll stop attempting to manage the mailbox subtask when we're detached, since there's nothing we can do if we don't have a PCIe address. Overall this produces a much cleaner shutdown and recovery cycle for a PCIe surprise remove event. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-02fm10k: prevent race condition of __FM10K_SERVICE_SCHEDJacob Keller1-7/+25
Although very unlikely, it is possible that cancel_work_sync() may stop the service_task before it actually started. In this case, the __FM10K_SERVICE_SCHED bit will never be cleared. This results in the service task being unable to reschedule in the future. Add a helper function which sets the service disable bit, waits for the service task to stop and clears the schedule bit, thus avoiding the race condition. We know the schedule bit is safe to clear because the cancel_work_sync() guarantees the service task is not running. Add a helper function also to restart the service task, for symmetry. This is not strictly needed but helps the mental model of how to stop and start the service task. This race could only happen in fm10k_suspend/fm10k_resume as this is the only place where the service task is actually restarted. Thus, suspend/resume testing would be ideal. However, note that the chance of this happening is very slim as the service event is scheduled for immediate execution, and you would have to trigger a suspend at almost the exact same time as the service task was scheduled. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-02fm10k: move fm10k_prepare_for_reset and fm10k_handle_resetJacob Keller1-29/+29
A future patch needs these functions defined earlier in the file. Move them closer to above where they will be called. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-02fm10k: avoid needless delay when loading driverJacob Keller1-4/+2
When we load the driver, we set the last_reset to be in the future, which delays the initial driver reset. Additionally, the service task isn't scheduled to run automatically until the timer runs out. This causes a needless delay of the first reset to begin talking to the switch manager. We can avoid this by simply not setting last_reset and immediately scheduling the service task while in probe. This allows the device to wake up faster, and avoids this delay. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-10-02fm10k: avoid possible truncation of q_vector->nameJacob Keller1-7/+7
New versions of GCC since version 7 began warning about possible truncation of calls to snprintf. We can fix this and avoid false positives. First, we should pass the full buffer size to snprintf, because it guarantees a NULL character as part of its passed length, so passing len-1 is simply wasting a byte of possible storage. Second, if we make the ri and ti variables unsigned, the compiler is able to correctly reason that the value never gets larger than 256, so it doesn't need to warn about the full space required to print a signed integer. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-07-03PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done()Christoph Hellwig1-23/+13
The pci_error_handlers->reset_notify() method had a flag to indicate whether to prepare for or clean up after a reset. The prepare and done cases have no shared functionality whatsoever, so split them into separate methods. [bhelgaas: changelog, update locking comments] Link: http://lkml.kernel.org/r/20170601111039.8913-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2017-04-06fm10k: disable receive queue when configuring ringNgai-Mint Kwan1-0/+1
Write to RXQCTL register to disable the receive queue when configuring the RX ring. Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-04-06fm10k: allow service task to reschedule itselfJacob Keller1-1/+12
If some code path executes fm10k_service_event_schedule(), it is guaranteed that we only queue the service task once, since we use __FM10K_SERVICE_SCHED flag. Unfortunately this has a side effect that if a service request occurs while we are currently running the watchdog, it is possible that we will fail to notice the request and ignore it until the next time the request occurs. This can cause problems with pf/vf mailbox communication and other service event tasks. To avoid this, introduce a FM10K_SERVICE_REQUEST bit. When we successfully schedule (and set the _SCHED bit) the service task, we will clear this bit. However, if we are unable to currently schedule the service event, we just set the new SERVICE_REQUEST bit. Finally, after the service event completes, we will re-schedule if the request bit has been set. This should ensure that we do not miss any service event schedules, since we will re-schedule it once the currently running task finishes. This means that for each request, we will always schedule the service task to run at least once in full after the request came in. This will avoid timing issues that can occur with the service event scheduling. We do pay a cost in re-running many tasks, but all the service event tasks use either flags to avoid duplicate work, or are tolerant of being run multiple times. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-04-06fm10k: future-proof state bitmaps using DECLARE_BITMAPJacob Keller1-31/+31
This ensures that future programmers do not have to remember to re-size the bitmaps due to adding new values. Although this is unlikely for this driver, it may happen and it's best to prevent it from ever being an issue. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-04-06fm10k: use a BITMAP for flags to avoid race conditionsJacob Keller1-16/+15
Replace bitwise operators and #defines with a BITMAP and enumeration values. This is similar to how we handle the "state" values as well. This has two distinct advantages over the old method. First, we ensure correctness of operations which are currently problematic due to race conditions. Suppose that two kernel threads are running, such as the watchdog and an ethtool ioctl, and both modify flags. We'll say that the watchdog is CPU A, and the ethtool ioctl is CPU B. CPU A sets FLAG_1, which can be seen as CPU A read FLAGS CPU A write FLAGS | FLAG_1 CPU B sets FLAG_2, which can be seen as CPU B read FLAGS CPU A write FLAGS | FLAG_2 However, "|=" and "&=" operators are not actually atomic. So this could be ordered like the following: CPU A read FLAGS -> variable CPU B read FLAGS -> variable CPU A write FLAGS (variable | FLAG_1) CPU B write FLAGS (variable | FLAG_2) Notice how the 2nd write from CPU B could actually undo the write from CPU A because it isn't guaranteed that the |= operation is atomic. In practice the race windows for most flag writes is incredibly narrow so it is not easy to isolate issues. However, the more flags we have, the more likely they will cause problems. Additionally, if such a problem were to arise, it would be incredibly difficult to track down. Second, there is an additional advantage beyond code correctness. We can now automatically size the BITMAP if more flags were added, so that we do not need to remember that flags is u32 and thus if we added too many flags we would over-run the variable. This is not a likely occurrence for fm10k driver, but this patch can serve as an example for other drivers which have many more flags. This particular change does have a bit of trouble converting some of the idioms previously used with the #defines for flags. Specifically, when converting FM10K_FLAG_RSS_FIELD_IPV[46]_UDP flags. This whole operation was actually quite problematic, because we actually stored flags separately. This could more easily show the problem of the above re-ordering issue. This is really difficult to test whether atomics make a difference in practical scenarios, but you can ensure that basic functionality remains the same. This patch has a lot of code coverage, but most of it is relatively simple. While we are modifying these files, update their copyright year. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-03-30drivers: add explicit interrupt.h includesFlorian Westphal1-0/+1
These files all use functions declared in interrupt.h, but currently rely on implicit inclusion of this file (via netns/xfrm.h). That won't work anymore when the flow cache is removed so include that header where needed. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-08fm10k: request reset when mbx->state changesNgai-Mint Kwan1-1/+5
Multiple IES API resets can cause a race condition where the mailbox interrupt request bits can be cleared before being handled. This can leave certain mailbox messages from the PF to be untreated and the PF will enter in some inactive state. If this situation occurs, the IES API will initiate a mailbox version reset which, then, trigger a mailbox state change. Once this mailbox transition occurs (from OPEN to CONNECT state), a request for reset will be returned. This ensures that PF will undergo a reset whenever IES API encounters an unknown global mailbox interrupt event or whenever the IES API terminates. Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: don't clear the RXQCTL register when enabling or disabling queuesJacob Keller1-3/+5
Ensure that other bits in the RXQCTL register do not get cleared. This ensures that bits related to queue ownership are maintained. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: remove unnecessary extra parenthesis around ((~value))Jacob Keller1-1/+1
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: add support for Rx offloads on one Geneve tunnelJacob Keller1-1/+2
Similar to how we handle VXLAN offload, enable support for a single Geneve tunnel. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: don't continue probe if PCI device not in normal IO stateJacob Keller1-0/+6
In the event of an uncorrectable AER error occurring when the driver has not loaded, the recovery routines are not done. This is done because future loads of the driver may not be aware of the IO state and may not be able to recover at all. In this case, when we next load the driver it fails due to what appears to be a surprise remove event. Instead, add a check to ensure that the device is in the normal IO state before continuing to probe. This allows us to give a more descriptive message of what is wrong. Without this change, the driver will attempt to probe up to our first call of .reset_hw() which will be unable to read registers and act as if a surprise remove event occurred. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: print error code when pci_enable_device_mem fails during probeJacob Keller1-1/+4
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: prefer READ_ONCE instead of ACCESS_ONCEJacob Keller1-1/+1
While technically not needed, as all our uses of ACCESS_ONCE are scalar types, we already use READ_ONCE in a few places, and for code readability we can swap all the uses of the older ACCESS_ONCE into READ_ONCE. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: use software values when checking for Tx hangs in hot pathJacob Keller1-1/+1
A previous patch added support to check for hardware Tx pending in the fm10k_down routine. This support was intended to ensure that we accurately check what the hardware state is. However, checking for Tx hangs in this manor during the hotpath results in a large performance hit. Avoid this by making the hotpath check use the SW counters instead. Fixes: a0f53cf49cb0 ("fm10k: use actual hardware registers when checking for pending Tx", 2016-06-08) Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-29fm10k: fix PCI device enable_cnt leak in .io_slot_resetJacob Keller1-1/+1
A previous patch removed the pci_disable_device() call in .io_error_detected. This call corresponded to a pci_enable_device_mem() call within .io_slot_reset handler. Change the call here to a pci_reenable_device() so that it does not increment and leak the enable_cnt reference count for the device. Without this change, VF devices may fail during an unbind/bind, and we'll never zero the reference counter for the pci_dev structure. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-08-03Merge tag 'pci-v4.8-changes' of ↵Linus Torvalds1-8/+3
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "Highlights: - ARM64 support for ACPI host bridges - new drivers for Axis ARTPEC-6 and Marvell Aardvark - new pci_alloc_irq_vectors() interface for MSI-X, MSI, legacy INTx - pci_resource_to_user() cleanup (more to come) Detailed summary: Enumeration: - Move ecam.h to linux/include/pci-ecam.h (Jayachandran C) - Add parent device field to ECAM struct pci_config_window (Jayachandran C) - Add generic MCFG table handling (Tomasz Nowicki) - Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki) - Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki) Resource management: - Add devm_request_pci_bus_resources() (Bjorn Helgaas) - Unify pci_resource_to_user() declarations (Bjorn Helgaas) - Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas) - Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas) - Make PCI I/O space optional on ARM32 (Bjorn Helgaas) - Ignore write combining when mapping I/O port space (Bjorn Helgaas) - Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas) - Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas) - Support I/O resources when parsing host bridge resources (Jayachandran C) - Add helpers to request/release memory and I/O regions (Johannes Thumshirn) - Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn) - Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5)) - Add generic pci_bus_claim_resources() (Lorenzo Pieralisi) - Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi) - Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi) - Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya) - Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu) PCI device hotplug: - Allow additional bus numbers for hotplug bridges (Keith Busch) - Ignore interrupts during D3cold (Lukas Wunner) Power management: - Enforce type casting for pci_power_t (Andy Shevchenko) - Don't clear d3cold_allowed for PCIe ports (Mika Westerberg) - Put PCIe ports into D3 during suspend (Mika Westerberg) - Power on bridges before scanning new devices (Mika Westerberg) - Runtime resume bridge before rescan (Mika Westerberg) - Add runtime PM support for PCIe ports (Mika Westerberg) - Remove redundant check of pcie_set_clkpm (Shawn Lin) Virtualization: - Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra) - Add DMA alias quirk for Adaptec 3805 (Alex Williamson) - Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake) - Add ACS quirk for Solarflare SFC9220 (Edward Cree) MSI: - Fix PCI_MSI dependencies (Arnd Bergmann) - Add pci_msix_desc_addr() helper (Christoph Hellwig) - Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig) - Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig) - Provide sensible IRQ vector alloc/free routines (Christoph Hellwig) - Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig) Error Handling: - Bind DPC to Root Ports as well as Downstream Ports (Keith Busch) - Remove DPC tristate module option (Keith Busch) - Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg) Generic host bridge driver: - Select IRQ_DOMAIN (Arnd Bergmann) - Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi) ACPI host bridge driver: - Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki) - Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki) - Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki) - Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki) Altera host bridge driver: - Check link status before retrain link (Ley Foon Tan) - Poll for link up status after retraining the link (Ley Foon Tan) Axis ARTPEC-6 host bridge driver: - Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann) - Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel) - Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel) Intel VMD host bridge driver: - Use lock save/restore in interrupt enable path (Jon Derrick) - Select device dma ops to override (Keith Busch) - Initialize list item in IRQ disable (Keith Busch) - Use x86_vector_domain as parent domain (Keith Busch) - Separate MSI and MSI-X vector sharing (Keith Busch) Marvell Aardvark host bridge driver: - Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni) - Add Aardvark PCI host controller driver (Thomas Petazzoni) - Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni) Microsoft Hyper-V host bridge driver: - Fix interrupt cleanup path (Cathy Avery) - Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov) - Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov) NVIDIA Tegra host bridge driver: - Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren) - Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren) - Use lower-case hex consistently for register definitions (Thierry Reding) - Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding) - Stop setting pcibios_min_mem (Thierry Reding) Renesas R-Car host bridge driver: - Drop gen2 dummy I/O port region (Bjorn Helgaas) TI DRA7xx host bridge driver: - Fix return value in case of error (Christophe JAILLET) Xilinx AXI host bridge driver: - Fix return value in case of error (Christophe JAILLET) Miscellaneous: - Make bus_attr_resource_alignment static (Ben Dooks) - Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks) - MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven) - Make host bridge drivers explicitly non-modular (Paul Gortmaker)" * tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (125 commits) PCI: xgene: Make explicitly non-modular PCI: thunder-pem: Make explicitly non-modular PCI: thunder-ecam: Make explicitly non-modular PCI: tegra: Make explicitly non-modular PCI: rcar-gen2: Make explicitly non-modular PCI: rcar: Make explicitly non-modular PCI: mvebu: Make explicitly non-modular PCI: layerscape: Make explicitly non-modular PCI: keystone: Make explicitly non-modular PCI: hisi: Make explicitly non-modular PCI: generic: Make explicitly non-modular PCI: designware-plat: Make it explicitly non-modular PCI: artpec6: Make explicitly non-modular PCI: armada8k: Make explicitly non-modular PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency PCI: Add ACS quirk for Solarflare SFC9220 arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700 PCI: aardvark: Add Aardvark PCI host controller driver dt-bindings: add DT binding for the Aardvark PCIe controller PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values ...
2016-07-21fm10k: force link to remain down for at least a second on resume eventsJacob Keller1-0/+4
When we resume from an AER recovery with many active VFs, the PF sees many spurious link up and link down events. Prevent this by delaying link down for at least one second after the resume event. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: check if PCIe link is restoredJacob Keller1-0/+13
Sometimes, a VF driver will lose PCIe address access, such as due to a PF FLR event. In fm10k_detach_subtask, poll and check whether the PCIe register space is active again and restore the device when it has. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: enable bus master after every resetJacob Keller1-0/+2
If an FLR occurs, VF devices will be knocked out of bus master mode, and the driver will be unable to recover from the reset properly, resulting in malicious driver events and an infinite reset loop. In the normal case, the bus master mode will already be enabled and this call will essentially be a no-op. Since we're doing this every reset, it is possible we could remove the other calls to pci_set_master() but it seems not harmful to just leave them in place. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: use common flow for suspend and resumeJacob Keller1-70/+3
Continuing the effort to commonize the similar suspend/resume flows, finish up by using the new fm10k_handle_suspand and fm10k_handle_resume functions for the standard suspend/resume flow. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: implement reset_notify handler for PCIe FLR eventsJacob Keller1-0/+33
When a function level PCI reset is triggered using sysfs, it calls the driver's .reset_notify error handler. Implement a handler based on the now split fm10k_prepare_for_reset and fm10k_handle_reset functions, so that we fully reset the driver when the PCI function level reset occurs. This also ensures the reset is handled in a clean way by first disabling all the driver bits first and then restoring them after the function reset. Previously the stack simply performed a blind function reset and our driver didn't take any part in the process. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: use common reset flow when handling io errors from PCI stackJacob Keller1-53/+7
Now that we have extracted the necessary steps for a split suspend/resume flow, re-use these functions instead of using the current open coded flow. This ensures that we don't miss any steps. It also ensures that we have the correct driver states set. Since we'll be handling all of the reset flow ourselves, we no longer need to request a reset in the io_slot_reset() function. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: implement prepare_suspend and handle_resumeJacob Keller1-0/+38
Implement fm10k_prepare_suspend and fm10k_handle_resume functions which abstract around the now existing fm10k_prepare_for_reset and fm10k_handle_reset. The new functions also handle stopping the service task, which is something that the original re-init flow does not need. Every other location that does a suspend/resume type flow is expected to use these functions, because otherwise they may have conflicts with the running watchdog routines. This also has the effect of preventing possible surprise remove events during handling of FLR events and PCIe errors. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: split fm10k_reinit into two functionsJacob Keller1-5/+28
There are several flows in the driver which perform the similar function of tearing down software and restoring software to recover from certain errors or PCIe events, including: * fm10k_reinit * fm10k_suspend/resume * fm10k_io_error_detected/fm10k_io_resume In addition, we want to implement a .reset_notify() handler as well which will also perform similar function. Rework how the driver codes reset and resume flows by separating out the reinit logic into two functions "fm10k_prepare_for_reset" and "fm10k_handle_reset". This first step will allow us to re-use this functionality in the similar blocks of code instead of re-coding the same sequence of events slightly different. The end result should be more maintainable and correct, fixing several inconsistencies with the work flow. The new functions expect to take the rtnl_lock() themselves, and it does have the unfortunate side effect of having the reinit flow take then release then take the rtnl_lock. However, this minor downside is out weighted by the benefits of code reduction and reducing needless difference between these flows. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: wait for queues to drain if stop_hw() fails onceJacob Keller1-6/+38
It turns out that sometimes during a reset the Tx queues will be temporarily stuck longer than .stop_hw() expects. Work around this issue by attempting to .stop_hw() first. If it tails, wait a number of attempts until the Tx queues appear to be drained. After this, attempt stop_hw() again. This ensures that we avoid waiting if we don't need to, such as during the first initialization of a VF, and give the proper amount of time necessary to recover from most situations. It is possible that the hardware is actually stuck. For PFs, this is usually fixed by a datapath reset. Unfortunately the VF cannot request a similar reset for itself. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: only warn when stop_hw fails with FM10K_ERR_REQUESTS_PENDINGJacob Keller1-1/+4
When stop_hw() routine fails with FM10K_ERR_REQUESTS_PENDING, this indicates that the Tx or Rx queues did not shutdown within the time limit. Print a more suitable message at the dev_info level instead of dev_err. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: prevent multiple threads updating statisticsJacob Keller1-0/+14
Also prevent updating stats while the interface is down. If we're already updating stats, just return doing nothing. When we take the device down, block stat updates until we come back up. This ensures that we avoid tearing down rings when we're updating statistics, and prevents updating statistics until we're up. We can't re-use the __FM10K_DOWN for this because it wouldn't prevent multiple threads from accessing statistics. Neither does it prevent the case where we start updating stats and then start going down in another thread. The fm10k_get_stats64 is except from this, because it has a completely different flow which does not suffer from the same issues as fm10k_update_stats might. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: avoid possible null pointer dereference in fm10k_update_statsJacob Keller1-2/+8
It's currently possible for fm10k_update_stats to be called during the window when we go down and the rings are removed. This can result in a null pointer dereference. In fm10k_get_stats64 we work around this by using ACCESS_ONCE and a null pointer check inside the loop. Use this same flow in the fm10k_update_stats to avoid the potential null pointer. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-07-21fm10k: no need to continue in fm10k_down if __FM10K_DOWN already setJacob Keller1-1/+2
Return early from fm10k_down() when we are already down, since that means another thread is either already finished or has started going down, so shouldn't conflict with them. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-06-23ethernet/intel: Use pci_(request|release)_mem_regionsJohannes Thumshirn1-8/+3
Now that we do have pci_request_mem_regions() and pci_release_mem_regions() at hand, use it in the Intel ethernet drivers. Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> CC: David S. Miller <davem@davemloft.net>
2016-05-04treewide: replace dev->trans_start update with helperFlorian Westphal1-1/+1
Replace all trans_start updates with netif_trans_update helper. change was done via spatch: struct net_device *d; @@ - d->trans_start = jiffies + netif_trans_update(d) Compile tested only. Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: linux1394-devel@lists.sourceforge.net Cc: linux-rdma@vger.kernel.org Cc: netdev@vger.kernel.org Cc: MPT-FusionLinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org Cc: linux-can@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: linux-bluetooth@vger.kernel.org Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-21fm10k: protect fm10k_open in fm10k_io_resume with rtnl_lockHannes Frederic Sowa1-0/+2
fm10k_open requires rtnl_lock to be held. Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Shannon Nelson <shannon.nelson@intel.com> Cc: Carolyn Wyborny <carolyn.wyborny@intel.com> Cc: Don Skidmore <donald.c.skidmore@intel.com> Cc: Bruce Allan <bruce.w.allan@intel.com> Cc: John Ronciak <john.ronciak@intel.com> Cc: Mitch Williams <mitch.a.williams@intel.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-21fm10k: consistently use Intel(R) for driver namesJacob Keller1-1/+1
Update every header file and other locations to consistently use Intel(R) instead of just Intel. Also update copyright year of files which we modified. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-21fm10k: do not disable PCI device in fm10k_io_error_detectedJacob Keller1-2/+0
fm10k_io_error_detected() does not need to call pci_disable_device(). In the cases where the reset needs to occur, the stack flow will result in calling fm10k_remove() which already disables the PCI device. If we leave the pci_disable_device(), we result in a warning about disabling an already disabled device. Many PCI drivers do call pci_disable_device() in their .error_detected() routines, but it does not appear to be required. In addition, these drivers have a check "is_pci_enabled()" call in their remove routines, which is how they chose to handle the duplicate device disable. This seems incorrect, since the PCI device structure is reference counted. It is very possible that the reference count for the PCI device could be greater than 1. In this case, you would remove the PCI device within the error_detected routine, reducing count to 1, then remove it again in the remove function, reducing it to zero. This would result in yet another disable somewhere else failing. Thus, we shouldn't be using is_pci_enabled() to check for this issue. Instead, just remove the extraneous pci_device_disable() found within the error_detected routine. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-21fm10k: correctly handle LPORT_MAP errorJacob Keller1-1/+30
Currently, any error responses from the switch manager after an LPORT_MAP request are silently ignored. At most the mailbox message will be reported as an error. This can result in unexpected behavior when the switch manager has configured a port with zero bandwidth. Add support for reading the fm10k_swapi_error structure from LPORT_MAP responses. If the message contains the necessary TLV and has a non-zero error code, report link down, clear the dglort_map, and delay the next get_host_state call by a reasonable delay. Also log an error message indicating that the LPORT_MAP request failed. The delay ensures preventing an interrupt storm on the switch manager, and reduces the number of mailbox messages we send in this scenario drastically. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-21fm10k: drop 1588 supportJacob Keller1-109/+1
The 1588 support within fm10k does not work correctly with the current version of the switch management software, and likely never worked correctly to begin with. Remove support for PTP/1588. Update copyright year for all these files while we're touching them. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-21fm10k: prevent RCU issues during AER eventsJacob Keller1-1/+10
During an AER action response, we were calling fm10k_close without holding the rtnl_lock() which could lead to possible RCU warnings being produced due to 64bit stat updates among other causes. Similarly, we need rtnl_lock() around fm10k_open during fm10k_io_resume. Follow the same pattern elsewhere in the driver and protect the entire open/close sequence. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-05fm10k: fix a minor typo in some commentsJacob Keller1-3/+3
s/funciton/function to resolve a typo, and cleanup grammar on a few comments regarding processing the VF mailboxes. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-04-05fm10k: free MBX IRQ before clearing interrupt schemeJacob Keller1-2/+2
During fm10k_io_error_detected we were clearing the interrupt scheme before we freed the MBX IRQ. This causes a kernel panic because the MBX IRQ are assigned after MSI-X initialization. Clearing the interrupt scheme results in removing the MSI-X entry table. Fix this by freeing the MBX IRQ before we clear the interrupt scheme, as we do elsewhere in the driver. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-15 12:42:59 +0300