litmus-rt.git/drivers/ntb, branch master

ntb: initialize max_mw for Atom before using it

2015-06-11T13:27:24+00:00

Commit ab760a0 (ntb: Adding split BAR support for Haswell platforms)
changed ntb_device's mw from a fixed-size array into a pointer that is
allocated based on limits.max_mw; however, on Atom platforms, max_mw
is not initialized until ntb_device_setup(), which happens after the
allocation.

Fill out max_mw in ntb_atom_detect() to match ntb_xeon_detect(); this
happens before the use of max_mw in the ndev->mw allocation.

Fixes a null pointer dereference on Atom platforms with ntb hardware.

v2: fix typo (mw_max should be max_mw)

Signed-off-by: Daniel Verkamp 
Acked-by: Dave Jiang 
Signed-off-by: Jon Mason

ntb: iounmap MW reg and vbase in error path

2015-06-09T02:38:40+00:00

The MW regbase and vbase(s) were not being freed if an error occurred
in the vbase allocation loop.  This is corrected by updating the error
path for the allocation loop to err4.

Reported-by: Julia Lawall 
Signed-off-by: Jon Mason

ntb: Adding split BAR support for Haswell platforms

2014-10-17T11:08:51+00:00

On the Haswell platform, a split BAR option to allow creation of 2
32bit BARs (4 and 5) from the 64bit BAR 4. Adding support for this
new option.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

ntb: use errata flag set via DID to implement workaround

2014-10-17T11:08:51+00:00

Instead of using a module parameter, we should detect the errata via
PCI DID and then set an appropriate flag. This will be used for additional
errata later on.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

ntb: conslidate reading of PPD to move platform detection earlier

2014-10-17T11:08:50+00:00

To simplify some of the platform detection code. Move the platform detection
to a function to be called earlier.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

ntb: move platform detection to separate function

2014-10-17T11:08:50+00:00

Move the platform detection function to separate functions to allow
easier maintenence.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

NTB: debugfs device entry

2014-10-17T11:08:50+00:00

Create a debugfs entry for the NTB device to log the basic device info,
as well as display the error count on a number of registers.

Signed-off-by: Jon Mason

ntb: Add alignment check to meet hardware requirement

2014-09-14T04:10:38+00:00

The NTB translate register must have the value to be BAR size aligned.
This alignment check make sure that the DMA memory allocated has the
proper alignment. Another requirement for NTB to function properly with
memory window BAR size greater or equal to 4M is to use the CMA feature
in 3.16 kernel with the appropriate CONFIG_CMA_ALIGNMENT and
CONFIG_CMA_SIZE_MBYTES set.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

NTB: correct the spread of queues over mw's

2014-09-14T04:10:38+00:00

The detection of an uneven number of queues on the given memory windows
was not correct.  The mw_num is zero based and the mod should be
division to spread them evenly over the mw's.

Signed-off-by: Jon Mason

ntb: Use pci_enable_msix_range() instead of pci_enable_msix()

2014-04-07T17:59:20+00:00

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range()  or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.

Signed-off-by: Alexander Gordeev 
Signed-off-by: Jon Mason