user/sven/linux.git/drivers/ntb, branch v3.14.36

Merge tag 'ntb-3.13' of git://github.com/jonmason/ntb

2013-11-26T19:15:12Z

Pull non-transparent bridge updates from Jon Mason: "NTB driver bug fixes to address a missed call to pci_enable_msix, NTB-RP Link Up issue, Xeon Doorbell errata workaround, ntb_transport link down race, and correct dmaengine_get/put usage. Also, clean-ups to remove duplicate defines and document a hardware errata. Finally, some changes to improve performance" * tag 'ntb-3.13' of git://github.com/jonmason/ntb: NTB: Disable interrupts and poll under high load NTB: Enable Snoop on Primary Side NTB: Document HW errata NTB: remove duplicate defines NTB: correct dmaengine_get/put usage NTB: Fix ntb_transport link down race ntb: Fix missed call to pci_enable_msix() NTB: Fix NTB-RP Link Up NTB: Xeon Doorbell errata workaround

NTB: Disable interrupts and poll under high load

2013-11-20T16:57:34Z

Disable interrupts and poll under high load Signed-off-by: Jon Mason

NTB: Enable Snoop on Primary Side

2013-11-20T16:57:33Z

Enable Snoop from Primary to Secondary side on BAR23 and BAR45 on all TLPs. Previously, Snoop was only enabled from Secondary to Primary side. This can have a performance improvement on some workloads. Also, make the code more obvious about how the link is being enabled. Signed-off-by: Jon Mason

NTB: Document HW errata

2013-11-20T16:57:33Z

Add a comment describing the necessary ordering of modifications to the NTB Limit and Base registers. Signed-off-by: Jon Mason

NTB: remove duplicate defines

2013-11-20T16:57:33Z

Remove duplicate defines in drivers/ntb/ntb_regs.h Signed-off-by: Michael Opdenacker Signed-off-by: Jon Mason

NTB: correct dmaengine_get/put usage

2013-11-20T16:57:32Z

dmaengine_get() causes the initialization of the per-cpu channel tables. It needs to be called prior to dma_find_channel(). Initial version by Dan Williams Signed-off-by: Jon Mason

NTB: Fix ntb_transport link down race

2013-11-20T16:57:32Z

A WARN_ON is being hit in ntb_qp_link_work due to the NTB transport link being down while the ntb qp link is still active. This is caused by the transport link being brought down prior to the qp link worker thread being terminated. To correct this, shutdown the qp's prior to bringing the transport link down. Also, only call the qp worker thread if it is in interrupt context, otherwise call the function directly. Signed-off-by: Jon Mason

ntb: Fix missed call to pci_enable_msix()

2013-11-20T16:57:31Z

Current MSI-X enablement code assumes MSI-Xs were successfully allocated in case less than requested vectors were available. That assumption is wrong, since MSI-Xs should be enabled with a repeated call to pci_enable_msix(). This update fixes this. Signed-off-by: Alexander Gordeev Signed-off-by: Jon Mason

NTB: Fix NTB-RP Link Up

2013-11-20T16:57:31Z

The Xeon NTB-RP setup, the transparent side does not get a link up/down interrupt. Since the presence of a NTB device on the transparent side means that we have a NTB link up, we can work around the lack of an interrupt by simply calling the link up function to notify the upper layers. Signed-off-by: Jon Mason

NTB: Xeon Doorbell errata workaround

2013-11-20T16:57:30Z

Modifications to the 14th bit of the B2BDOORBELL register will not be mirrored to the remote system due to a hardware issue. To get around the issue, shrink the number of available doorbell bits by 1. The max number of doorbells was being used as a way to referencing the Link Doorbell bit. Since this would no longer work, the driver must now explicitly reference that bit. This does not affect the xeon_errata_workaround case, as it is not using the b2bdoorbell register. Signed-off-by: Jon Mason