linux-toradex.git/drivers/rapidio/devices, branch v3.14.4

rapidio/tsi721: fix tasklet termination in dma channel release

2014-03-04T15:55:49+00:00

This patch is a modification of the patch originally proposed by
Xiaotian Feng : https://lkml.org/lkml/2012/11/5/413
This new version disables DMA channel interrupts and ensures that the
tasklet wil not be scheduled again before calling tasklet_kill().

Unfortunately the updated patch was not released at that time due to
planned rework of Tsi721 mport driver to use threaded interrupts (which
has yet to happen).  Recently the issue was reported again:
https://lkml.org/lkml/2014/2/19/762.

Description from the original Xiaotian's patch:

 "Some drivers use tasklet_disable in device remove/release process,
  tasklet_disable will inc tasklet->count and return.  If the tasklet is
  not handled yet under some softirq pressure, the tasklet will be
  placed on the tasklet_vec, never have a chance to be excuted.  This
  might lead to a heavy loaded ksoftirqd, wakeup with pending_softirq,
  but tasklet is disabled.  tasklet_kill should be used in this case."

This patch is applicable to kernel versions starting from v3.5.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Xiaotian Feng 
Reviewed-by: Thomas Gleixner 
Cc: Mike Galbraith 
Cc: 	[3.5+]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio/tsi721: convert to modular mport driver

2013-07-03T23:08:04+00:00

This patch adds an option to build device driver for Tsi721 PCIe-to-SRIO
bridge device as a kernel module.

Currently this module cannot be unloaded because the existing RapidIO
subsystem code does not support dynamic removal of local RapidIO
controllers (TODO).

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Kumar Gala 
Cc: Andre van Herk 
Cc: Micha Nelissen 
Cc: Stef van Os 
Cc: Jean Delvare 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio/tsi721: fix bug in MSI interrupt handling

2013-05-24T23:22:51+00:00

Fix bug in MSI interrupt handling which causes loss of event
notifications.

Typical indication of lost MSI interrupts are stalled message and
doorbell transfers between RapidIO endpoints.  To avoid loss of MSI
interrupts all interrupts from the device must be disabled on entering
the interrupt handler routine and re-enabled when exiting it.
Re-enabling device interrupts will trigger new MSI message(s) if Tsi721
registered new events since entering interrupt handler routine.

This patch is applicable to kernel versions starting from v3.2.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio: remove use of __devinit

2012-11-28T20:11:31+00:00

CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton 
Cc: Matt Porter 
Acked-by: Alexandre Bounine 
Signed-off-by: Greg Kroah-Hartman

rapidio/tsi721: add inbound memory mapping callbacks

2012-10-05T18:05:21+00:00

Add Tsi721 routines to support RapidIO subsystem's inbound memory mapping
interface (RapidIO to system's local memory).

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: Li Yang 
Cc: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rapidio/devices/tsi721.c: fix error return code

2012-10-05T18:05:20+00:00

Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// 
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// 

Signed-off-by: Peter Senna Tschudin 
Acked-by: Alexandre Bounine 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rapidio/tsi721: modify mport name assignment

2012-10-05T18:05:20+00:00

Modify RapidIO mport device name assignment to include device name of PCIe
side of Tsi721 bridge.  The new name format is intended to provide
definitive reference between RapidIO and PCIe sides of the bridge in
systems with multiple Tsi721 bridges.

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge commit 'v3.6-rc5' into next

2012-09-13T14:41:01+00:00

* commit 'v3.6-rc5': (1098 commits)
  Linux 3.6-rc5
  HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
  Remove user-triggerable BUG from mpol_to_str
  xen/pciback: Fix proper FLR steps.
  uml: fix compile error in deliver_alarm()
  dj: memory scribble in logi_dj
  Fix order of arguments to compat_put_time[spec|val]
  xen: Use correct masking in xen_swiotlb_alloc_coherent.
  xen: fix logical error in tlb flushing
  xen/p2m: Fix one-off error in checking the P2M tree directory.
  powerpc: Don't use __put_user() in patch_instruction
  powerpc: Make sure IPI handlers see data written by IPI senders
  powerpc: Restore correct DSCR in context switch
  powerpc: Fix DSCR inheritance in copy_thread()
  powerpc: Keep thread.dscr and thread.dscr_inherit in sync
  powerpc: Update DSCR on all CPUs when writing sysfs dscr_default
  powerpc/powernv: Always go into nap mode when CPU is offline
  powerpc: Give hypervisor decrementer interrupts their own handler
  powerpc/vphn: Fix arch_update_cpu_topology() return value
  ARM: gemini: fix the gemini build
  ...

Conflicts:
	drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
	drivers/rapidio/devices/tsi721.c

rapdio/tsi721: Use PCI Express Capability accessors

2012-08-23T16:11:16+00:00

Use PCI Express Capability access functions to simplify tsi721 driver.

[bhelgaas: use word (16-bit) accesses for PCI_EXP_DEVCTL, PCI_EXP_DEVCTL2]
Signed-off-by: Jiang Liu 
Signed-off-by: Bjorn Helgaas 
Acked-by: Alexandre Bounine

rapidio/tsi721: fix unused variable compiler warning

2012-08-21T23:45:03+00:00

Fix unused variable compiler warning when built with CONFIG_RAPIDIO_DEBUG
option off.

This patch is applicable to kernel versions starting from v3.2

Signed-off-by: Alexandre Bounine 
Cc: Matt Porter 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds