linux/drivers/ntb, branch v3.12.10

ntb: clean up unnecessary MSI/MSI-X capability find

2013-09-05T18:08:01Z

PCI core will initialize device MSI/MSI-X capability in pci_msi_init_pci_dev(). So device driver should use pci_dev->msi_cap/msix_cap to determine whether the device support MSI/MSI-X instead of using pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX). Access to PCIe device config space again will consume more time. Signed-off-by: Yijing Wang Signed-off-by: Jon Mason

NTB: Update Version

2013-09-05T18:08:00Z

Update NTB version to 1.0 Signed-off-by: Jon Mason

NTB: Comment Fix

2013-09-05T18:08:00Z

Add "data" ntb_register_db_callback parameter description comment and correct poor spelling. Signed-off-by: Jon Mason

NTB: Remove unused variable

2013-09-05T18:07:59Z

Remove unused pci_dev variable from ntb_transport_free() Signed-off-by: Jon Mason

NTB: Remove References of non-B2B BWD HW

2013-09-05T18:07:59Z

NTB-RP is not a supported configuration on BWD hardware. Remove the code attempting to set it up. Signed-off-by: Jon Mason

NTB: NTB-RP support

2013-09-05T18:07:58Z

Add support for Non-Transparent Bridge connected to a PCI-E Root Port on the remote system (also known as NTB-RP mode). This allows for a NTB enabled system to be connected to a non-NTB enabled system/slot. Modifications to the registers and BARs/MWs on the Secondary side by the remote system are reflected into registers on the Primary side for the local system. Similarly, modifications of registers and BARs/MWs on Primary side by the local system are reflected into registers on the Secondary side for the Remote System. This allows communication between the 2 sides via these registers and BARs/MWs. Note: there is not a fix for the Xeon Errata (that was already worked around in NTB-B2B mode) for NTB-RP mode. Due to this limitation, NTB-RP will not work on the Secondary side with the Xeon Errata workaround enabled. To get around this, disable the workaround via the xeon_errata_workaround=0 modparm. However, this can cause the hang described in the errata. Signed-off-by: Jon Mason

NTB: Rename Variables for NTB-RP

2013-09-05T18:07:58Z

Many variable names in the NTB driver refer to the primary or secondary side. However, these variables will be used to access the reverse case when in NTB-RP mode. Make these names more generic in anticipation of NTB-RP support. Signed-off-by: Jon Mason

NTB: Use DMA Engine to Transmit and Receive

2013-09-05T18:04:09Z

Allocate and use a DMA engine channel to transmit and receive data over NTB. If none is allocated, fall back to using the CPU to transfer data. Signed-off-by: Jon Mason Reviewed-by: Dan Williams Reviewed-by: Dave Jiang

NTB: Enable 32bit Support

2013-09-03T21:48:53Z

Correct the issues on NTB that prevented it from working on x86_32 and modify the Kconfig to allow it to be permitted to be used in that environment as well. Signed-off-by: Jon Mason

NTB: Update Device IDs

2013-09-03T21:48:53Z

Add support for new Intel NTB devices on upcoming Xeon hardware. Since the Xeon hardware design is already in place in the driver, all that is needed are the new device ids. Remove the device IDs for NTB devs running in Transparent Bridge mode, as this driver is not being used for those devices. Rename the device IDs for NTB devs running in NTB-RP mode to better identify their usage model. "PS" to denote the Primary Side of NTB, and "SS" to denote the secondary side. The primary side is the interface exposed to the local system, and the secondary side is the interface exposed to the remote system. Signed-off-by: Jon Mason