linux-stable.git/drivers/pci/switch, branch linux-4.15.y

Merge tag 'ntb-4.15' of git://github.com/jonmason/ntb

2017-11-20T06:41:53+00:00

Pull ntb updates from Jon Mason:
 "Support for the switchtec ntb and related changes. Also, a couple of
  bug fixes"

[ The timing isn't great. I had asked people to send me pull requests
  before my family vacation, and this code has not even been in
  linux-next as far as I can tell. But Logan Gunthorpe pleaded for its
  inclusion because the Switchtec driver has apparently been around for
  a while, just never in linux-next - Linus ]

* tag 'ntb-4.15' of git://github.com/jonmason/ntb:
  ntb: intel: remove b2b memory window workaround for Skylake NTB
  NTB: make idt_89hpes_cfg const
  NTB: switchtec_ntb: Update switchtec documentation with notes for NTB
  NTB: switchtec_ntb: Add memory window support
  NTB: switchtec_ntb: Implement scratchpad registers
  NTB: switchtec_ntb: Implement doorbell registers
  NTB: switchtec_ntb: Add link management
  NTB: switchtec_ntb: Add skeleton NTB driver
  NTB: switchtec_ntb: Initialize hardware for doorbells and messages
  NTB: switchtec_ntb: Initialize hardware for memory windows
  NTB: switchtec_ntb: Introduce initial NTB driver
  NTB: Add check and comment for link up to mw_count() and mw_get_align()
  NTB: Ensure ntb_mw_get_align() is only called when the link is up
  NTB: switchtec: Add link event notifier callback
  NTB: switchtec: Add NTB hardware register definitions
  NTB: switchtec: Export class symbol for use in upper layer driver
  NTB: switchtec: Move structure definitions into a common header
  ntb: update maintainer list for Intel NTB driver

NTB: switchtec_ntb: Introduce initial NTB driver

2017-11-19T01:37:12+00:00

Seeing the Switchtec NTB hardware shares the same endpoint as the
management endpoint we utilize the class_interface API to register
an NTB driver for every Switchtec device in the system that has the
NTB class code.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Stephen Bates 
Reviewed-by: Kurt Schwemmer 
Acked-by: Allen Hubbe 
Acked-by: Bjorn Helgaas 
Signed-off-by: Jon Mason

NTB: switchtec: Add link event notifier callback

2017-11-19T01:37:11+00:00

In order for the Switchtec NTB code to handle link change events we
create a notifier callback in the switchtec code which gets called
whenever an appropriate event interrupt occurs.

In order to preserve userspace's ability to follow these events,
we compare the event count with a stored copy from last time we
checked.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Stephen Bates 
Reviewed-by: Kurt Schwemmer 
Acked-by: Bjorn Helgaas 
Signed-off-by: Jon Mason

NTB: switchtec: Export class symbol for use in upper layer driver

2017-11-19T01:37:11+00:00

We export the class pointer symbol and add an extern define in the
Switchtec header file.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Stephen Bates 
Reviewed-by: Kurt Schwemmer 
Acked-by: Bjorn Helgaas 
Signed-off-by: Jon Mason

NTB: switchtec: Move structure definitions into a common header

2017-11-19T01:37:11+00:00

Create the switchtec.h header in include/linux with hardware defines
and the switchtec_dev structure. Both moved directly from switchtec.c.
This is a prep patch for creating an NTB driver for Switchtec.

Signed-off-by: Logan Gunthorpe 
Reviewed-by: Stephen Bates 
Reviewed-by: Kurt Schwemmer 
Acked-by: Greg Kroah-Hartman 
Acked-by: Bjorn Helgaas 
Signed-off-by: Jon Mason

switchtec: Make struct event_regs static

2017-10-05T21:08:34+00:00

The structure event_regs is local to the source and does not need to be in
global scope, so make it static.

Cleans up sparse warning:

  symbol 'event_regs' was not declared. Should it be static

Signed-off-by: Colin Ian King 
Signed-off-by: Bjorn Helgaas 
Acked-by: Logan Gunthorpe

Merge branch 'pci/switchtec' into next

2017-07-02T23:51:10+00:00

* pci/switchtec:
  switchtec: Add device IDs for additional Switchtec products
  switchtec: Add "running" status flag to fw partition info ioctl

switchtec: Add device IDs for additional Switchtec products

2017-06-27T23:25:06+00:00

The switchtec driver also supports the PAX, PFXL and PFXI products which
have the same management interface.

Signed-off-by: Logan Gunthorpe 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Kurt Schwemmer

switchtec: Add "running" status flag to fw partition info ioctl

2017-06-27T23:23:14+00:00

This flag lets userspace know which firmware partitions are currently in
use as opposed to just active.  "Active" means they will be in use for the
next reboot, whereas "running" means they are currently in use.

If an old kernel is in use, or the firmware doesn't support these fields,
the new flag will not be set in the output.

Signed-off-by: Logan Gunthorpe 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Kurt Schwemmer

switchtec: Fix minor bug with partition ID register

2017-05-22T21:52:30+00:00

When a switch endpoint is configured without NTB, the mmio_ntb registers
will read all zeros.  However, in corner case configurations where the
partition ID is not zero and NTB is not enabled, the code will have the
wrong partition ID and this causes the driver to use the wrong set of
drivers.  To fix this we simply take the partition ID from the system info
region.

Reported-by: Dingbao Chen 
Signed-off-by: Logan Gunthorpe 
Signed-off-by: Bjorn Helgaas