staging: comedi: pcmmio: remove subdevice private data
Only subdevice[2], the dio interrupt subdevice, uses the subdevice private data.
Move the members from struct pcmmio_subdev_private to struct pcmmio_private and
remove the subdevice private data. This also allows removing the allocation and
freeing of devpriv->sprivs.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: remove 'num_asic_chans' from subdevice private data
The 'num_asic_chans' that support interrupts in the interrupt subdevice is
always initialized to '24'. Remove this unneeded information from the subdevice
private data.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: remove 'asic_chan' from subdevice private data
The first 'asic_chan' that supports interrupts in the interrupt subdevice is
always initialized to '0'. Remove this unneeded information from the subdevice
private data.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: remove 'first_chan' from subdevice private data
The 'first_chan' that supports interrupts in the interrupt subdevice is always
initialized to '0'. Remove this unneeded information from the subdevice private
data.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: remove 'asic' member from subdevice private data
This member of the subdevice private data is always initialized to '0' by
the only subdevice that uses it. Since we only have one asic on the board
it's really not needed. Just remove it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: unwind the digital i/o subdevice init
The board supported by this driver only has one asic that provides the
two digital i/o subdevices. The first dio subdevice has 24 channels that
support interrupts. The second dio subdevice also has 24 channels but no
interrupt support.
To make the code clearer and easier to maintain, remove the for () loop
that initialized these subdevices.
Also, correctly initialize the interrupt subdevice. The current code does
not set the SDF_CMD_READ subdev_flag and does not set the dev->read_subdev
pointer in the comedi_device.
Use the dev->read_subdev pointer in the interrupt handler to get the
interrupt subdevice and private data pointer instead of searching for
them. To keep this patch reviewable, the extra indents in interrupt_pcmmio()
will be removed later.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This function is only called by the interrupt subdevice so the sanity
check of the 'asic' is not necessary. Remove it.
The 'nports' is always 3 and the 'firstport' is always 0. Remove the
for () loop that clears the registers to disable the interrupts and
just use the pcmmio_dio_write() helper to write to the three page
registers.
This also fixes a bug where the write to the page registers is not
protected with the spinlock.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently this function uses the subdevice private data to get the
iobase address needed to update the dio output channel state and
read the current state of the input channels. This subdevice private
data is in the process of being removed.
Use the subdevice 'index' to determine the base 'port' needed to
access the correct digital i/o registers. The pcmmio_dio_write()
function can then be used to update the outputs.
Introduce a new helper function, pcmmio_dio_read(), to read the
current state of the input channels.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently this function uses the subdevice private data to get the
iobase address needed to update the channel configuration. This
subdevice private data is in the process of being removed.
Use the subdevice 'index' to determine the base 'port' needed to
access the correct digital i/o registers. The pcmmio_dio_write()
function can then be used to update the configuration.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: cleanup the digital i/o register defines
Redefine the registers used to access the digital i/o so that they
are based on the dev->iobase of the board instead of the 'asic_iobase'
that is stored in the private data.
Remove the then unused 'asic_iobase'.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename this function so it has namespace associated with the driver.
The board supported by this driver only has one WinSystems WS16C48 asic
on it that handles the digital i/o. Remove the unnecessary for () loop
that would reset multiple asics.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The for () loop that does the request_irq() in this driver is a bit of
an overkill. The code appears to have been copied from the pcmuio driver
which supports boards with 1 or 2 ASIC devices. The board supported by
this driver only has 1 ASIC.
Simplify the code and store the irq number in the comedi_device. This
allows the core to automatically do the free_irq() when the driver is
detached.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename this function so it has namespace associated with the driver.
Move the 'chan' local variable out of the for () loop. The 'chan' is
constant for the comedi_insn and only needs to be fetched once from
the insn->chanspec.
Also, remove the sanity check of the chan. The comedi core will ensure
that the chan is valid for the subdevice before calling this function.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename this function to have namespace associated with the driver.
Refactor the function to remove the extra write to the command register
to set the range before writing the DAC value. Since the range is constant
for the entire comedi_insn it only needs to be set once. All writes to the
DAC after that will use the same range.
Define the register map for the analog output registers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: move ao shadow data to device private data
There is only one ai subdevice in this driver so there is no reason
to hold the last sample written to each channel in the subdevice
private data. Move the data into the device private data,
This gets some of the data out of the subdevice private data union
and removes some of the uses of the ugly 'subpriv' macro.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
staging: comedi: pcmmio: tidy up the ai subdevice init
Add some whitespace to the ai subdevice init and reorder it a bit
to follow the "norm" in comedi drivers.
Remove the init of s->len_chanlist. This member is only used with
subdevices that support async commands. The core will default the
value correctly..
The ai subdevice only uses the s->private member to pass the iobase
to the analog input registers. It's just a copy of the dev->iobase,
use that instead.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename this function to have namespace associated with the driver.
Refactor the function to remove the extra write to the command register
between each ADC conversion. We only need to do one dummy conversion in
order to flush the serial ADC. After that each command will return the
result of the previous conversion.
Define the register map for the analog input registers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All the I/O ports are left unlocked in the driver so the 'pagelock'
in the private data is not necessary. The paranoia sanity checks
are also unnecessary, Remove them.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Stultz [Tue, 17 Dec 2013 05:07:51 +0000 (21:07 -0800)]
staging: ion: Add HAVE_MEMBLOCK config dependency
The kbuild test robot reported a build issue w/ ION on m68k:
drivers/staging/android/ion/ion.c: In function 'ion_reserve':
drivers/staging/android/ion/ion.c:1526:4: error: implicit declaration of function 'memblock_alloc_base' [-Werror=implicit-function-declaration]
drivers/staging/android/ion/ion.c:1528:11: error: 'MEMBLOCK_ALLOC_ANYWHERE' undeclared (first use in this function)
drivers/staging/android/ion/ion.c:1528:11: note: each undeclared identifier is reported only once for each function it appears in
drivers/staging/android/ion/ion.c:1537:4: error: implicit declaration of function 'memblock_reserve' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
This is caused by ION using memblock functionality which m68k doesn't support.
This patch adds a HAVE_MEMBLOCK dependency to the ION config.
Acked-by: Colin Cross <ccross@android.com> Cc: Android Kernel Team <kernel-team@android.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wei Yongjun [Tue, 17 Dec 2013 03:20:22 +0000 (11:20 +0800)]
gpu: ion: fix sparse non static symbol warnings
Fixes the following sparse warnings:
drivers/staging/android/ion/tegra/tegra_ion.c:23:19: warning:
symbol 'idev' was not declared. Should it be static?
drivers/staging/android/ion/tegra/tegra_ion.c:24:19: warning:
symbol 'tegra_user_mapper' was not declared. Should it be static?
drivers/staging/android/ion/tegra/tegra_ion.c:25:5: warning:
symbol 'num_heaps' was not declared. Should it be static?
drivers/staging/android/ion/tegra/tegra_ion.c:26:17: warning:
symbol 'heaps' was not declared. Should it be static?
drivers/staging/android/ion/tegra/tegra_ion.c:28:5: warning:
symbol 'tegra_ion_probe' was not declared. Should it be static?
drivers/staging/android/ion/tegra/tegra_ion.c:66:5: warning:
symbol 'tegra_ion_remove' was not declared. Should it be static?
Colin Cross [Tue, 17 Dec 2013 00:48:17 +0000 (16:48 -0800)]
ion: remove ion_user_handle_t from ion_test.h
ion_test.h should not define ion_user_handle_t, and defining it
causes a warning:
In file included from drivers/staging/android/ion/ion_test.c:31:
drivers/staging/android/ion/../uapi/ion_test.h:23: error: redefinition of typedef 'ion_user_handle_t'
drivers/staging/android/ion/../uapi/ion.h:23: note: previous declaration of 'ion_user_handle_t' was here
Reported-by: Andrew Morton <akpm@linux-foundation.org> Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Matias Bjorling [Tue, 10 Dec 2013 15:50:38 +0000 (16:50 +0100)]
null_blk: mem garbage on NUMA systems during init
For NUMA systems, initializing the blk-mq layer and using per node hctx.
We initialize submit queues to 1, while blk-mq nr_hw_queues is
initialized to the number of NUMA nodes.
This makes the null_init_hctx function overwrite memory outside of what
it allocated. In my case it lead to writing garbage into struct
request_queue's mq_map.
radeon_pm: fix oops in hwmon_attributes_visible() and radeon_hwmon_show_temp_thresh()
Since commit ec39f64bba34 ("drm/radeon/dpm: Convert to use
devm_hwmon_register_with_groups") radeon_hwmon_init() is using
hwmon_device_register_with_groups(), which sets `rdev' as a device
private driver_data, while hwmon_attributes_visible() and
radeon_hwmon_show_temp_thresh() are still waiting for `drm_device'.
Fix them by using dev_get_drvdata(), in order to avoid this oops:
1) Revert CHECKSUM_COMPLETE optimization in pskb_trim_rcsum(), I can't
figure out why it breaks things.
2) Fix comparison in netfilter ipset's hash_netnet4_data_equal(), it
was basically doing "x == x", from Dave Jones.
3) Freescale FEC driver was DMA mapping the wrong number of bytes, from
Sebastian Siewior.
4) Blackhole and prohibit routes in ipv6 were not doing the right thing
because their ->input and ->output methods were not being assigned
correctly. Now they behave properly like their ipv4 counterparts.
From Kamala R.
5) Several drivers advertise the NETIF_F_FRAGLIST capability, but
really do not support this feature and will send garbage packets if
fed fraglist SKBs. From Eric Dumazet.
6) Fix long standing user triggerable BUG_ON over loopback in RDS
protocol stack, from Venkat Venkatsubra.
7) Several not so common code paths can potentially try to invoke
packet scheduler actions that might be NULL without checking. Shore
things up by either 1) defining a method as mandatory and erroring
on registration if that method is NULL 2) defininig a method as
optional and the registration function hooks up a default
implementation when NULL is seen. From Jamal Hadi Salim.
8) Fix fragment detection in xen-natback driver, from Paul Durrant.
9) Kill dangling enter_memory_pressure method in cg_proto ops, from
Eric W Biederman.
10) SKBs that traverse namespaces should have their local_df cleared,
from Hannes Frederic Sowa.
11) IOCB file position is not being updated by macvtap_aio_read() and
tun_chr_aio_read(). From Zhi Yong Wu.
12) Don't free virtio_net netdev before releasing all of the NAPI
instances. From Andrey Vagin.
13) Procfs entry leak in xt_hashlimit, from Sergey Popovich.
14) IPv6 routes that are no cached routes should not count against the
garbage collection limits. We had this almost right, but were
missing handling addrconf generated routes properly. From Hannes
Frederic Sowa.
15) fib{4,6}_rule_suppress() have to consider potentially seeing NULL
route info when they are called, from Stefan Tomanek.
16) TUN and MACVTAP have had truncated packet signalling for some time,
fix from Jason Wang.
17) Fix use after frrr in __udp4_lib_rcv(), from Eric Dumazet.
18) xen-netback does not interpret the NAPI budget properly for TX work,
fix from Paul Durrant.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (132 commits)
igb: Fix for issue where values could be too high for udelay function.
i40e: fix null dereference
xen-netback: fix gso_prefix check
net: make neigh_priv_len in struct net_device 16bit instead of 8bit
drivers: net: cpsw: fix for cpsw crash when build as modules
xen-netback: napi: don't prematurely request a tx event
xen-netback: napi: fix abuse of budget
sch_tbf: use do_div() for 64-bit divide
udp: ipv4: must add synchronization in udp_sk_rx_dst_set()
net:fec: remove duplicate lines in comment about errata ERR006358
Revert "8390 : Replace ei_debug with msg_enable/NETIF_MSG_* feature"
8390 : Replace ei_debug with msg_enable/NETIF_MSG_* feature
xen-netback: make sure skb linear area covers checksum field
net: smc91x: Fix device tree based configuration so it's usable
udp: ipv4: fix potential use after free in udp_v4_early_demux()
macvtap: signal truncated packets
tun: unbreak truncated packet signalling
net: sched: htb: fix the calculation of quantum
net: sched: tbf: fix the calculation of max_size
micrel: add support for KSZ8041RNLI
...
Linus Torvalds [Sun, 15 Dec 2013 19:52:47 +0000 (11:52 -0800)]
Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin:
"This is a pretty small batch:
The biggest single change is to stop using EFI time services on 32-bit
platforms. This matches our current behavior on 64-bit platforms as
we already had ruled them out there as being too unreliable. Turns
out that affects 32-bit platforms, too.
One NULL pointer fix for SGI UV.
Two minor build fixes, one of which only affects icc and the other
which affects icc and future versions or nonstandard default settings
of gcc"
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, efi: Don't use (U)EFI time services on 32 bit
x86, build, icc: Remove uninitialized_var() from compiler-intel.h
x86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot option is used
x86, build: Pass in additional -mno-mmx, -mno-sse options
Linus Torvalds [Sun, 15 Dec 2013 19:45:27 +0000 (11:45 -0800)]
Merge tag 'pci-v3.13-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"PCI device hotplug
- Move device_del() from pci_stop_dev() to pci_destroy_dev() (Rafael
Wysocki)
Host bridge drivers
- Update maintainers for DesignWare, i.MX6, Armada, R-Car (Bjorn
Helgaas)
- mvebu: Return 'unsupported' for Interrupt Line and Interrupt Pin
(Jason Gunthorpe)
Miscellaneous
- Avoid unnecessary CPU switch when calling .probe() (Alexander
Duyck)
- Revert "workqueue: allow work_on_cpu() to be called recursively"
(Bjorn Helgaas)
- Disable Bus Master only on kexec reboot (Khalid Aziz)
- Omit PCI ID macro strings to shorten quirk names for LTO (Michal
Marek)"
* tag 'pci-v3.13-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
MAINTAINERS: Add DesignWare, i.MX6, Armada, R-Car PCI host maintainers
PCI: Disable Bus Master only on kexec reboot
PCI: mvebu: Return 'unsupported' for Interrupt Line and Interrupt Pin
PCI: Omit PCI ID macro strings to shorten quirk names
PCI: Move device_del() from pci_stop_dev() to pci_destroy_dev()
Revert "workqueue: allow work_on_cpu() to be called recursively"
PCI: Avoid unnecessary CPU switch when calling driver .probe() method
Linus Torvalds [Sun, 15 Dec 2013 19:28:02 +0000 (11:28 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull SELinux fixes from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
selinux: process labeled IPsec TCP SYN-ACK packets properly in selinux_ip_postroute()
selinux: look for IPsec labels on both inbound and outbound packets
selinux: handle TCP SYN-ACK packets correctly in selinux_ip_postroute()
selinux: handle TCP SYN-ACK packets correctly in selinux_ip_output()
selinux: fix possible memory leak
and Josh Boyer bisected it down to this commit. Reverting the commit in
the rawhide kernel fixes the problem.
Eric Paris root-caused it to incorrect subtype matching in that commit
breaking fuse, and has a tentative patch, but by now we're better off
retrying this in 3.14 rather than playing with it any more.
Reported-by: Tom London <selinux@gmail.com> Bisected-by: Josh Boyer <jwboyer@fedoraproject.org> Acked-by: Eric Paris <eparis@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Anand Avati <avati@redhat.com> Cc: Paul Moore <paul@paul-moore.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
John Stultz [Sat, 14 Dec 2013 20:06:45 +0000 (12:06 -0800)]
ion: Don't allow building ION as a module.
ION doesn't export the proper symbols for it to be a module. This
causes build issues when ION is configured as a module.
Since Andorid kernels rarely use modules (I think recent policy
requires no modules?), go ahead and set the ION config to a bool
from the tristate option.
If folks decide ION as a module is important, we will have to go
through and export the various needed symbols.
Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Carolyn Wyborny [Sat, 14 Dec 2013 11:26:46 +0000 (03:26 -0800)]
igb: Fix for issue where values could be too high for udelay function.
This patch changes the igb_phy_has_link function to check the value of the
parameter before deciding to use udelay or mdelay in order to be sure that
the value is not too high for udelay function.
CC: stable kernel <stable@vger.kernel.org> # 3.9+ Signed-off-by: Sunil K Pandey <sunil.k.pandey@intel.com> Signed-off-by: Kevin B Smith <kevin.b.smith@intel.com> Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jesse Brandeburg [Sat, 14 Dec 2013 11:26:45 +0000 (03:26 -0800)]
i40e: fix null dereference
If the vsi->tx_rings structure is NULL we don't want to panic.
Change-Id: Ic694f043701738c434e8ebe0caf0673f4410dc10 Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Cross [Sat, 14 Dec 2013 03:26:32 +0000 (19:26 -0800)]
ion: fix bugs in cma heap
Implement ion_cma_unmap_kernel, ion will call it unconditionally.
Use correct gfp flags when calling dma_alloc_coherent so it doesn't
try to use atomic DMA memory.
Check for invalid alignment when allocating.
Reject cached allocations - the cpu address returned by
dma_alloc_coherent is always going to be an uncached mapping, so
map_kernel will not see data written by a cached userspace mapping.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:30 +0000 (19:26 -0800)]
ion: add helper to zero contiguous region of pages
Add ion_heap_pages_zero for ion heaps to use to zero pages
during initialization or allocation, when a struct ion_buffer
may not be available. Use it from the chunk heap and carveout
heaps.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:29 +0000 (19:26 -0800)]
ion: carveout heap: zero buffers on free, fix memory leak
The carveout heap wasn't zeroing its buffers after use.
Create the sg_table during allocate instead of map_dma, to allow
using the sg_table during free, and call ion_heap_buffer_zero
during free. Also fixes a missing kfree when destroying the
table.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:27 +0000 (19:26 -0800)]
ion: use alloc_pages in system contig heap
There is no reason to use kzalloc, just call alloc_pages directly.
Change the GFP from GFP_KERNEL to include __GFP_HIGH, to allow it
to return contiguous pages from highmem. virt_to_* functions
aren't valid on highmem pages, so store the struct page * in an
sg_table in buffer->priv_virt like most other heaps, and replace
virt_to_* with page_to_*.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:26 +0000 (19:26 -0800)]
ion: allow cached mappings of chunk and system heap buffers
Now that ion_vm_fault uses vm_insert_pfn instead of vm_insert_page
cached buffers can be supported in any heap. Remove the checks
in the chunk and system heaps.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:25 +0000 (19:26 -0800)]
ion: remove ion_heap_alloc_pages
Now that ion_vm_fault doesn't need a struct page with a nonzero
refcount, there is no need allocate heap memory for cached pages using
split_page. Remove the ion_heap_alloc_pages and ion_heap_free_pages
helpers in favor of direct calls to alloc_pages and __free_pages,
and remove the special handling in the system heap.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:24 +0000 (19:26 -0800)]
ion: use vm_insert_pfn for faulted pages
Most ion userspace mappings are created with remap_pfn_range. Use
vm_insert_pfn instead of vm_insert_page to make faulted cached
mappings look more like uncached mappings.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:21 +0000 (19:26 -0800)]
ion: optimize ion_heap_buffer_zero
ion_heap_buffer_zero can spend a long time in unmap_kernel_range
if it has to broadcast a tlb flush to every cpu for every page.
Modify it to batch pages into a larger region to clear using a
single mapping. This may cause the mapping size to change if
the buffer size is not a multiple of the mapping size, so
switch to allocating the address space for each chunk. This
allows us to use vm_map_ram to handle the allocation and mapping
together.
The number of pages to zero using a single mapping is set to 32
to hit the fastpath in vm_map_ram.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Stultz [Sat, 14 Dec 2013 03:26:18 +0000 (19:26 -0800)]
ion: Fix two small issues in system_heap allocation
In testing ion system heap allocations, I ran across two issues:
1) Not k*z*allocing the sg table. This can cause trouble if
we end up trying call sg_alloc_table() with too many entries,
then sg_alloc_table() internally fails and tries to free what it
thinks is internal table structure, which causes bad pointer
traversals.
2) The second list_for_each_entry probably should be _safe,
since I was seeing strange lock warnings and oopses on occasion.
This seems to resolve it, but could use some extra checking.
Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:16 +0000 (19:26 -0800)]
ion: clean up ioctls
Convert the ion ioctls to use _IOW instead of _IOWR where
appropriate, and factor out the copy_from_user and copy_to_user
based on the _IOC_DIR bits. For the existing incorrect ioctls,
add a function to wrap _IOC_DIR to return the corrected value.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Sat, 14 Dec 2013 03:26:13 +0000 (19:26 -0800)]
ion: don't use phys_to_page or __phys_to_pfn
phys_to_page and __phys_to_pfn don't exist on all platforms.
Use a combination of pfn_to_page, PFN_DOWN, page_to_pfn, and
virt_to_page to get the same results.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:25:06 +0000 (14:25 -0800)]
ion: don't use __arm_ioremap to map pages
ion_heap_map_kernel already implements mapping a scatterlist of
pages into the kernel, and all heaps are required to have struct
pages associated with them, so delete the functions that use
__arm_ioremap and use ion_heap_map_kernel instead.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:25:04 +0000 (14:25 -0800)]
ion: add test device for unit tests to interact with dma_bufs
Add a /dev/ion-test device that will be created if CONFIG_ION_TEST
is set. The device accepts a dma_buf fd and allows reading and
writing to the backing memory using DMA-like apis or kernel mapping
apis. Can be used to test the dma_buf mapping ops, including
the ion implementations, from userspace.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:25:03 +0000 (14:25 -0800)]
ion: check invalid values in ion_system_heap
ion_system_heap can only satisfy page alignment, and
ion_system_contig_heap can only satisify alignment to the
allocation size. Neither can support faulting user mappings
because they use slab pages.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:25:01 +0000 (14:25 -0800)]
ion: fix dma APIs
__dma_page_cpu_to_dev is a private ARM api that is not available
on 3.10 and was never available on other architectures. We can
get the same behavior by calling dma_sync_sg_for_device with a
scatterlist containing a single page. It's still not quite a
kosher use of the dma apis, we still conflate physical addresses
with bus addresses, but it should at least compile on all
platforms, and work on any platform that doesn't have a physical
to bus address translation.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:25:00 +0000 (14:25 -0800)]
ion: fix crash when alloc len is -1
If userspace passes a length between -4095 and -1 to allocate it
will pass the len != 0 check, but when len is page aligned it will
be 0. Check len after page aligning.
Drop the warning as well, userspace shouldn't be able to trigger
a warning in the kernel.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Colin Cross [Fri, 13 Dec 2013 22:24:59 +0000 (14:24 -0800)]
ion: hold reference to handle after ion_uhandle_get
commit 1262ab1846cf76f7549c66ef709120dbfbe6d49f (ion: replace
userspace handle cookies with idr) broke the locking in ion.
The ION_IOC_FREE and ION_IOC_MAP ioctls were relying on
ion_handle_validate to detect the case where a call raced
with another ION_IOC_FREE which may have freed the struct
ion_handle.
Rename ion_uhandle_get to ion_handle_get_by_id, and have it
take the client lock and return with an extra reference to
the handle. Make each caller put its reference once it
is done with the handle.
Also modify users of ion_handle_validate to continue to hold
the client lock after calling ion_handle_validate until
they are done with the handle, and warn if ion_handle_validate
is called without the client lock held.
Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Stultz [Fri, 13 Dec 2013 22:24:58 +0000 (14:24 -0800)]
ion: Fix compat support to use proper compat ioctl numbers
The compat support added to ion didn't provide compat ioctl numbers
(who's value depends on the compat structure size). So 32bit
applications would get an error when trying to make ioctl calls.
This patch adds the needed COMPAT_ macros and uses them in the
compat_ion_ioctl, translating them to their non-compat cmd when
calling the normal ioctl call.
Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
projects / linux-beck.git / log