GitHub/exynos8895/android_kernel_samsung_universal8895.git
13 years agoKVM: nVMX: Exiting from L2 to L1
Nadav Har'El [Wed, 25 May 2011 20:11:34 +0000 (23:11 +0300)]
KVM: nVMX: Exiting from L2 to L1

This patch implements nested_vmx_vmexit(), called when the nested L2 guest
exits and we want to run its L1 parent and let it handle this exit.

Note that this will not necessarily be called on every L2 exit. L0 may decide
to handle a particular exit on its own, without L1's involvement; In that
case, L0 will handle the exit, and resume running L2, without running L1 and
without calling nested_vmx_vmexit(). The logic for deciding whether to handle
a particular exit in L1 or in L0, i.e., whether to call nested_vmx_vmexit(),
will appear in a separate patch below.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: No need for handle_vmx_insn function any more
Nadav Har'El [Wed, 25 May 2011 20:11:03 +0000 (23:11 +0300)]
KVM: nVMX: No need for handle_vmx_insn function any more

Before nested VMX support, the exit handler for a guest executing a VMX
instruction (vmclear, vmlaunch, vmptrld, vmptrst, vmread, vmread, vmresume,
vmwrite, vmon, vmoff), was handle_vmx_insn(). This handler simply threw a #UD
exception. Now that all these exit reasons are properly handled (and emulate
the respective VMX instruction), nothing calls this dummy handler and it can
be removed.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMLAUNCH and VMRESUME
Nadav Har'El [Wed, 25 May 2011 20:10:33 +0000 (23:10 +0300)]
KVM: nVMX: Implement VMLAUNCH and VMRESUME

Implement the VMLAUNCH and VMRESUME instructions, allowing a guest
hypervisor to run its own guests.

This patch does not include some of the necessary validity checks on
vmcs12 fields before the entry. These will appear in a separate patch
below.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Prepare vmcs02 from vmcs01 and vmcs12
Nadav Har'El [Wed, 25 May 2011 20:10:02 +0000 (23:10 +0300)]
KVM: nVMX: Prepare vmcs02 from vmcs01 and vmcs12

This patch contains code to prepare the VMCS which can be used to actually
run the L2 guest, vmcs02. prepare_vmcs02 appropriately merges the information
in vmcs12 (the vmcs that L1 built for L2) and in vmcs01 (our desires for our
own guests).

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Move control field setup to functions
Nadav Har'El [Wed, 25 May 2011 20:09:31 +0000 (23:09 +0300)]
KVM: nVMX: Move control field setup to functions

Move some of the control field setup to common functions. These functions will
also be needed for running L2 guests - L0's desires (expressed in these
functions) will be appropriately merged with L1's desires.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Move host-state field setup to a function
Nadav Har'El [Wed, 25 May 2011 20:09:01 +0000 (23:09 +0300)]
KVM: nVMX: Move host-state field setup to a function

Move the setting of constant host-state fields (fields that do not change
throughout the life of the guest) from vmx_vcpu_setup to a new common function
vmx_set_constant_host_state(). This function will also be used to set the
host state when running L2 guests.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMREAD and VMWRITE
Nadav Har'El [Wed, 25 May 2011 20:08:30 +0000 (23:08 +0300)]
KVM: nVMX: Implement VMREAD and VMWRITE

Implement the VMREAD and VMWRITE instructions. With these instructions, L1
can read and write to the VMCS it is holding. The values are read or written
to the fields of the vmcs12 structure introduced in a previous patch.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMPTRST
Nadav Har'El [Wed, 25 May 2011 20:08:00 +0000 (23:08 +0300)]
KVM: nVMX: Implement VMPTRST

This patch implements the VMPTRST instruction.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMPTRLD
Nadav Har'El [Wed, 25 May 2011 20:07:29 +0000 (23:07 +0300)]
KVM: nVMX: Implement VMPTRLD

This patch implements the VMPTRLD instruction.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMCLEAR
Nadav Har'El [Wed, 25 May 2011 20:06:59 +0000 (23:06 +0300)]
KVM: nVMX: Implement VMCLEAR

This patch implements the VMCLEAR instruction.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Success/failure of VMX instructions.
Nadav Har'El [Wed, 25 May 2011 20:06:28 +0000 (23:06 +0300)]
KVM: nVMX: Success/failure of VMX instructions.

VMX instructions specify success or failure by setting certain RFLAGS bits.
This patch contains common functions to do this, and they will be used in
the following patches which emulate the various VMX instructions.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Add VMCS fields to the vmcs12
Nadav Har'El [Wed, 25 May 2011 20:05:57 +0000 (23:05 +0300)]
KVM: nVMX: Add VMCS fields to the vmcs12

In this patch we add to vmcs12 (the VMCS that L1 keeps for L2) all the
standard VMCS fields.

Later patches will enable L1 to read and write these fields using VMREAD/
VMWRITE, and they will be used during a VMLAUNCH/VMRESUME in preparing vmcs02,
a hardware VMCS for running L2.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Introduce vmcs02: VMCS used to run L2
Nadav Har'El [Wed, 25 May 2011 20:05:27 +0000 (23:05 +0300)]
KVM: nVMX: Introduce vmcs02: VMCS used to run L2

We saw in a previous patch that L1 controls its L2 guest with a vcms12.
L0 needs to create a real VMCS for running L2. We call that "vmcs02".
A later patch will contain the code, prepare_vmcs02(), for filling the vmcs02
fields. This patch only contains code for allocating vmcs02.

In this version, prepare_vmcs02() sets *all* of vmcs02's fields each time we
enter from L1 to L2, so keeping just one vmcs02 for the vcpu is enough: It can
be reused even when L1 runs multiple L2 guests. However, in future versions
we'll probably want to add an optimization where vmcs02 fields that rarely
change will not be set each time. For that, we may want to keep around several
vmcs02s of L2 guests that have recently run, so that potentially we could run
these L2s again more quickly because less vmwrites to vmcs02 will be needed.

This patch adds to each vcpu a vmcs02 pool, vmx->nested.vmcs02_pool,
which remembers the vmcs02s last used to run up to VMCS02_POOL_SIZE L2s.
As explained above, in the current version we choose VMCS02_POOL_SIZE=1,
I.e., one vmcs02 is allocated (and loaded onto the processor), and it is
reused to enter any L2 guest. In the future, when prepare_vmcs02() is
optimized not to set all fields every time, VMCS02_POOL_SIZE should be
increased.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Decoding memory operands of VMX instructions
Nadav Har'El [Wed, 25 May 2011 20:04:56 +0000 (23:04 +0300)]
KVM: nVMX: Decoding memory operands of VMX instructions

This patch includes a utility function for decoding pointer operands of VMX
instructions issued by L1 (a guest hypervisor)

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement reading and writing of VMX MSRs
Nadav Har'El [Wed, 25 May 2011 20:04:25 +0000 (23:04 +0300)]
KVM: nVMX: Implement reading and writing of VMX MSRs

When the guest can use VMX instructions (when the "nested" module option is
on), it should also be able to read and write VMX MSRs, e.g., to query about
VMX capabilities. This patch adds this support.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Introduce vmcs12: a VMCS structure for L1
Nadav Har'El [Wed, 25 May 2011 20:03:55 +0000 (23:03 +0300)]
KVM: nVMX: Introduce vmcs12: a VMCS structure for L1

An implementation of VMX needs to define a VMCS structure. This structure
is kept in guest memory, but is opaque to the guest (who can only read or
write it with VMX instructions).

This patch starts to define the VMCS structure which our nested VMX
implementation will present to L1. We call it "vmcs12", as it is the VMCS
that L1 keeps for its L2 guest. We will add more content to this structure
in later patches.

This patch also adds the notion (as required by the VMX spec) of L1's "current
VMCS", and finally includes utility functions for mapping the guest-allocated
VMCSs in host memory.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Allow setting the VMXE bit in CR4
Nadav Har'El [Wed, 25 May 2011 20:03:24 +0000 (23:03 +0300)]
KVM: nVMX: Allow setting the VMXE bit in CR4

This patch allows the guest to enable the VMXE bit in CR4, which is a
prerequisite to running VMXON.

Whether to allow setting the VMXE bit now depends on the architecture (svm
or vmx), so its checking has moved to kvm_x86_ops->set_cr4(). This function
now returns an int: If kvm_x86_ops->set_cr4() returns 1, __kvm_set_cr4()
will also return 1, and this will cause kvm_set_cr4() will throw a #GP.

Turning on the VMXE bit is allowed only when the nested VMX feature is
enabled, and turning it off is forbidden after a vmxon.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Implement VMXON and VMXOFF
Nadav Har'El [Wed, 25 May 2011 20:02:54 +0000 (23:02 +0300)]
KVM: nVMX: Implement VMXON and VMXOFF

This patch allows a guest to use the VMXON and VMXOFF instructions, and
emulates them accordingly. Basically this amounts to checking some
prerequisites, and then remembering whether the guest has enabled or disabled
VMX operation.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: nVMX: Add "nested" module option to kvm_intel
Nadav Har'El [Wed, 25 May 2011 20:02:23 +0000 (23:02 +0300)]
KVM: nVMX: Add "nested" module option to kvm_intel

This patch adds to kvm_intel a module option "nested". This option controls
whether the guest can use VMX instructions, i.e., whether we allow nested
virtualization. A similar, but separate, option already exists for the
SVM module.

This option currently defaults to 0, meaning that nested VMX must be
explicitly enabled by giving nested=1. When nested VMX matures, the default
should probably be changed to enable nested VMX by default - just like
nested SVM is currently enabled by default.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: x86 emulator: Avoid clearing the whole decode_cache
Takuya Yoshikawa [Wed, 25 May 2011 02:09:38 +0000 (11:09 +0900)]
KVM: x86 emulator: Avoid clearing the whole decode_cache

During tracing the emulator, we noticed that init_emulate_ctxt()
sometimes took a bit longer time than we expected.

This patch is for mitigating the problem by some degree.

By looking into the function, we soon notice that it clears the whole
decode_cache whose size is about 2.5K bytes now.  Furthermore, most of
the bytes are taken for the two read_cache arrays, which are used only
by a few instructions.

Considering the fact that we are not assuming the cache arrays have
been cleared when we store actual data, we do not need to clear the
arrays: 2K bytes elimination.  In addition, we can avoid clearing the
fetch_cache and regs arrays.

This patch changes the initialization not to clear the arrays.

On our 64-bit host, init_emulate_ctxt() becomes 0.3 to 0.5us faster with
this patch applied.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: x86 emulator: Clean up init_emulate_ctxt()
Takuya Yoshikawa [Wed, 25 May 2011 02:06:16 +0000 (11:06 +0900)]
KVM: x86 emulator: Clean up init_emulate_ctxt()

Use a local pointer to the emulate_ctxt for simplicity.  Then, arrange
the hard-to-read mode selection lines neatly.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: Clean up error handling during VCPU creation
Jan Kiszka [Mon, 23 May 2011 08:33:05 +0000 (10:33 +0200)]
KVM: Clean up error handling during VCPU creation

So far kvm_arch_vcpu_setup is responsible for freeing the vcpu struct if
it fails. Move this confusing resonsibility back into the hands of
kvm_vm_ioctl_create_vcpu. Only kvm_arch_vcpu_setup of x86 is affected,
all other archs cannot fail.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: VMX: Keep list of loaded VMCSs, instead of vcpus
Nadav Har'El [Tue, 24 May 2011 12:26:10 +0000 (15:26 +0300)]
KVM: VMX: Keep list of loaded VMCSs, instead of vcpus

In VMX, before we bring down a CPU we must VMCLEAR all VMCSs loaded on it
because (at least in theory) the processor might not have written all of its
content back to memory. Since a patch from June 26, 2008, this is done using
a per-cpu "vcpus_on_cpu" linked list of vcpus loaded on each CPU.

The problem is that with nested VMX, we no longer have the concept of a
vcpu being loaded on a cpu: A vcpu has multiple VMCSs (one for L1, a pool for
L2s), and each of those may be have been last loaded on a different cpu.

So instead of linking the vcpus, we link the VMCSs, using a new structure
loaded_vmcs. This structure contains the VMCS, and the information pertaining
to its loading on a specific cpu (namely, the cpu number, and whether it
was already launched on this cpu once). In nested we will also use the same
structure to hold L2 VMCSs, and vmx->loaded_vmcs is a pointer to the
currently active VMCS.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Acked-by: Acked-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: Sanitize cpuid
Avi Kivity [Wed, 18 May 2011 09:56:07 +0000 (05:56 -0400)]
KVM: Sanitize cpuid

Instead of blacklisting known-unsupported cpuid leaves, whitelist known-
supported leaves.  This is more conservative and prevents us from reporting
features we don't support.  Also whitelist a few more leaves while at it.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: MMU: cleanup for dropping parent pte
Xiao Guangrong [Sun, 15 May 2011 15:28:29 +0000 (23:28 +0800)]
KVM: MMU: cleanup for dropping parent pte

Introduce drop_parent_pte to remove the rmap of parent pte and
clear parent pte

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: MMU: cleanup for kvm_mmu_page_unlink_children
Xiao Guangrong [Sun, 15 May 2011 15:27:52 +0000 (23:27 +0800)]
KVM: MMU: cleanup for kvm_mmu_page_unlink_children

Cleanup the same operation between kvm_mmu_page_unlink_children and
mmu_pte_write_zap_pte

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: MMU: remove the arithmetic of parent pte rmap
Xiao Guangrong [Sun, 15 May 2011 15:27:08 +0000 (23:27 +0800)]
KVM: MMU: remove the arithmetic of parent pte rmap

Parent pte rmap and page rmap are very similar, so use the same arithmetic
for them

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: MMU: abstract the operation of rmap
Xiao Guangrong [Sun, 15 May 2011 15:26:20 +0000 (23:26 +0800)]
KVM: MMU: abstract the operation of rmap

Abstract the operation of rmap to spte_list, then we can use it for the
reverse mapping of parent pte in the later patch

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: fix uninitialized warning
Xiao Guangrong [Sun, 15 May 2011 15:25:10 +0000 (23:25 +0800)]
KVM: fix uninitialized warning

Fix:

 warning: â€˜cs_sel’ may be used uninitialized in this function
 warning: â€˜ss_sel’ may be used uninitialized in this function

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: use __copy_to_user/__clear_user to write guest page
Xiao Guangrong [Sun, 15 May 2011 15:22:04 +0000 (23:22 +0800)]
KVM: use __copy_to_user/__clear_user to write guest page

Simply use __copy_to_user/__clear_user to write guest page since we have
already verified the user address when the memslot is set

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: MMU: optimize pte write path if don't have protected sp
Xiao Guangrong [Sun, 15 May 2011 15:20:27 +0000 (23:20 +0800)]
KVM: MMU: optimize pte write path if don't have protected sp

Simply return from kvm_mmu_pte_write path if no shadow page is
write-protected, then we can avoid to walk all shadow pages and hold
mmu-lock

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: VMX: always_inline VMREADs
Avi Kivity [Sun, 15 May 2011 14:13:13 +0000 (10:13 -0400)]
KVM: VMX: always_inline VMREADs

vmcs_readl() and friends are really short, but gcc thinks they are long because of
the out-of-line exception handlers.  Mark them always_inline to clear the
misunderstanding.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: VMX: Move VMREAD cleanup to exception handler
Avi Kivity [Sun, 15 May 2011 14:13:12 +0000 (10:13 -0400)]
KVM: VMX: Move VMREAD cleanup to exception handler

We clean up a failed VMREAD by clearing the output register.  Do
it in the exception handler instead of unconditionally.  This is
worthwhile since there are more than a hundred call sites.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: x86 emulator: Stop passing ctxt->ops as arg of emul functions
Takuya Yoshikawa [Sat, 14 May 2011 16:00:52 +0000 (01:00 +0900)]
KVM: x86 emulator: Stop passing ctxt->ops as arg of emul functions

Dereference it in the actual users.

This not only cleans up the emulator but also makes it easy to convert
the old emulation functions to the new em_xxx() form later.

Note: Remove some inline keywords to let the compiler decide inlining.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: x86 emulator: Stop passing ctxt->ops as arg of decode helpers
Takuya Yoshikawa [Sat, 14 May 2011 15:57:43 +0000 (00:57 +0900)]
KVM: x86 emulator: Stop passing ctxt->ops as arg of decode helpers

Dereference it in the actual users: only do_insn_fetch_byte().

This is consistent with the way __linearize() dereferences it.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: x86 emulator: Place insn_fetch helpers together
Takuya Yoshikawa [Sat, 14 May 2011 15:54:58 +0000 (00:54 +0900)]
KVM: x86 emulator: Place insn_fetch helpers together

The two macros need special care to use:
  Assume rc, ctxt, ops and done exist outside of them.
  Can goto outside.

Considering the fact that these are used only in decode functions,
moving these right after do_insn_fetch() seems to be a right thing
to improve the readability.

We also rename do_fetch_insn_byte() to do_insn_fetch_byte() to be
consistent.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoKVM: Document KVM_GET_LAPIC, KVM_SET_LAPIC ioctl
Avi Kivity [Wed, 11 May 2011 12:30:51 +0000 (08:30 -0400)]
KVM: Document KVM_GET_LAPIC, KVM_SET_LAPIC ioctl

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoMerge branch 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6
Linus Torvalds [Thu, 7 Jul 2011 01:36:53 +0000 (18:36 -0700)]
Merge branch 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6

* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
  gpio: tps65910: add missing breaks in tps65910_gpio_init

13 years agoDocumentation: fix cgroup blkio throttle filenames
Andrea Righi [Wed, 6 Jul 2011 18:26:26 +0000 (11:26 -0700)]
Documentation: fix cgroup blkio throttle filenames

All the blkio.throttle.* file names are incorrectly reported without
".throttle" in the documentation. Fix it.

Signed-off-by: Andrea Righi <andrea@betterlinux.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: update CodingStyle memory allocators
Jesper Juhl [Wed, 6 Jul 2011 18:27:17 +0000 (11:27 -0700)]
Documentation: update CodingStyle memory allocators

The list of available general purpose memory allocators in
Documentation/CodingStyle chapter 14 is incomplete. This patch adds
the missing vzalloc() to the list.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMAINTAINERS: move kernel-doc patches location
Randy Dunlap [Wed, 6 Jul 2011 18:19:56 +0000 (11:19 -0700)]
MAINTAINERS: move kernel-doc patches location

Move location of quilt series for kernel-doc patches.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Wed, 6 Jul 2011 19:16:49 +0000 (12:16 -0700)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-2.6

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (46 commits)
  [media] rc: call input_sync after scancode reports
  [media] imon: allow either proto on unknown 0xffdc
  [media] imon: auto-config ffdc 7e device
  [media] saa7134: fix raw IR timeout value
  [media] rc: fix ghost keypresses with certain hw
  [media] [staging] lirc_serial: allocate irq at init time
  [media] lirc_zilog: fix spinning rx thread
  [media] keymaps: fix table for pinnacle pctv hd devices
  [media] ite-cir: 8709 needs to use pnp resource 2
  [media] V4L: mx1-camera: fix uninitialized variable
  [media] omap_vout: Added check in reqbuf & mmap for buf_size allocation
  [media] OMAP_VOUT: Change hardcoded device node number to -1
  [media] OMAP_VOUTLIB: Fix wrong resizer calculation
  [media] uvcvideo: Disable the queue when failing to start
  [media] uvcvideo: Remove buffers from the queues when freeing
  [media] uvcvideo: Ignore entities for terminals with no supported format
  [media] v4l: Don't access media entity after is has been destroyed
  [media] media: omap3isp: fix a potential NULL deref
  [media] media: vb2: fix allocation failure check
  [media] media: vb2: reset queued_count value during queue reinitialization
  ...

Fix up trivial conflict in MAINTAINERS as per Mauro

13 years agoFDPIC: Fix memory leak
Davidlohr Bueso [Wed, 6 Jul 2011 11:26:05 +0000 (12:26 +0100)]
FDPIC: Fix memory leak

The shdr4extnum variable isn't being freed in the cleanup process of
elf_fdpic_core_dump().

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoresource: ability to resize an allocated resource
Ram Pai [Wed, 6 Jul 2011 06:44:30 +0000 (23:44 -0700)]
resource: ability to resize an allocated resource

Provides the ability to resize a resource that is already allocated.
This functionality is put in place to support reallocation needs of
pci resources.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agofs: fix lock initialization
Miklos Szeredi [Wed, 6 Jul 2011 10:33:55 +0000 (12:33 +0200)]
fs: fix lock initialization

locks_alloc_lock() assumed that the allocated struct file_lock is
already initialized to zero members.  This is only true for the first
allocation of the structure, after reuse some of the members will have
random values.

This will for example result in passing random fl_start values to
userspace in fuse for FL_FLOCK locks, which is an information leak at
best.

Fix by reinitializing those members which may be non-zero after freeing.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agogpio: tps65910: add missing breaks in tps65910_gpio_init
Axel Lin [Wed, 6 Jul 2011 02:08:27 +0000 (10:08 +0800)]
gpio: tps65910: add missing breaks in tps65910_gpio_init

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
13 years agoMerge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Wed, 6 Jul 2011 03:57:45 +0000 (20:57 -0700)]
Merge branch 'usb-linus' of git://git./linux/kernel/git/gregkh/usb-2.6

* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: fix regression occurring during device removal
  USB: fsl_udc_core: fix build breakage when building for ARM arch

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Linus Torvalds [Wed, 6 Jul 2011 03:57:08 +0000 (20:57 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sameo/mfd-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Add Makefile and Kconfig Entries for tps65911 comparator
  mfd: Fix build error for tps65911-comparator.c
  Revert "mfd: Add omap-usbhs runtime PM support"
  input: pmic8xxx-pwrkey: Do not use mfd_get_data()
  input: pmic8xxx-keypad: Do not use mfd_get_data()

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Tue, 5 Jul 2011 20:15:57 +0000 (13:15 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: fix sync and dio writes across stripe boundaries
  libceph: fix page calculation for non-page-aligned io
  ceph: fix page alignment corrections

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus
Linus Torvalds [Tue, 5 Jul 2011 17:04:27 +0000 (10:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/hch/hfsplus

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus:
  hfsplus: Fix double iput of the same inode in hfsplus_fill_super()
  hfsplus: add missing call to bio_put()

13 years agomfd: Add Makefile and Kconfig Entries for tps65911 comparator
Axel Lin [Thu, 23 Jun 2011 02:15:51 +0000 (10:15 +0800)]
mfd: Add Makefile and Kconfig Entries for tps65911 comparator

Base on Mark's comment [1], I make the Kconfig entry invisible to users.
[1] https://lkml.org/lkml/2011/5/14/136

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
13 years agomfd: Fix build error for tps65911-comparator.c
Axel Lin [Thu, 23 Jun 2011 02:17:43 +0000 (10:17 +0800)]
mfd: Fix build error for tps65911-comparator.c

Fix below build error:
  CC      drivers/mfd/tps65911-comparator.o
drivers/mfd/tps65911-comparator.c: In function 'tps65911_comparator_probe':
drivers/mfd/tps65911-comparator.c:131: error: 'struct tps65910_platform_data' has no member named 'vmbch_threshold'
drivers/mfd/tps65911-comparator.c:137: error: 'struct tps65910_platform_data' has no member named 'vmbch2_threshold'
make[2]: *** [drivers/mfd/tps65911-comparator.o] Error 1
make[1]: *** [drivers/mfd] Error 2
make: *** [drivers] Error 2

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
13 years agoRevert "mfd: Add omap-usbhs runtime PM support"
Keshava Munegowda [Mon, 20 Jun 2011 13:22:56 +0000 (15:22 +0200)]
Revert "mfd: Add omap-usbhs runtime PM support"

This reverts commit 7e6502d577106fb5b202bbaac64c5f1b065e6daa.

Oops are produced during initialization of ehci and ohci
drivers. This is because the run time pm apis are used by
the driver but the corresponding hwmod structures and
initialization is not merged. hence revering  back the
commit id 7e6502d577106fb5b202bbaac64c5f1b065e6daa

Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com>
Reported-by: Luciano Coelho <coelho@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
13 years agoinput: pmic8xxx-pwrkey: Do not use mfd_get_data()
Samuel Ortiz [Wed, 8 Jun 2011 09:06:30 +0000 (11:06 +0200)]
input: pmic8xxx-pwrkey: Do not use mfd_get_data()

mfd_get_data() has been removed from the MFD API.

Cc: Anirudh Ghayal <aghayal@codeaurora.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
13 years agoinput: pmic8xxx-keypad: Do not use mfd_get_data()
Samuel Ortiz [Wed, 8 Jun 2011 09:03:23 +0000 (11:03 +0200)]
input: pmic8xxx-keypad: Do not use mfd_get_data()

mfd_get_data() has been removed from the MFD API.

Cc: Anirudh Ghayal <aghayal@codeaurora.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
13 years agoLinux 3.0-rc6
Linus Torvalds [Mon, 4 Jul 2011 22:56:24 +0000 (15:56 -0700)]
Linux 3.0-rc6

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
Linus Torvalds [Mon, 4 Jul 2011 22:54:37 +0000 (15:54 -0700)]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: (277 commits)
  [SCSI] isci: fix checkpatch errors
  isci: Device reset should request sas_phy_reset(phy, true)
  isci: pare back error messsages
  isci: cleanup silicon revision detection
  isci: merge scu_unsolicited_frame.h into unsolicited_frame_control.h
  isci: merge sata.[ch] into request.c
  isci: kill 'get/set' macros
  isci: retire scic_sds_ and scic_ prefixes
  isci: unify isci_host and scic_sds_controller
  isci: unify isci_remote_device and scic_sds_remote_device
  isci: unify isci_port and scic_sds_port
  isci: fix scic_sds_remote_device_terminate_requests
  isci: unify isci_phy and scic_sds_phy
  isci: unify isci_request and scic_sds_request
  isci: rename / clean up scic_sds_stp_request
  isci: preallocate requests
  isci: combine request flags
  isci: unify can_queue tracking on the tci_pool, uplevel tag assignment
  isci: Terminate dev requests on FIS err bit rx in NCQ
  isci: fix frame received locking
  ...

13 years agoMerge branch 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux...
Linus Torvalds [Mon, 4 Jul 2011 22:54:18 +0000 (15:54 -0700)]
Merge branch 'at91/fixes' of git://git./linux/kernel/git/arm/linux-2.6-arm-soc

* 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc:
  AT91: Change nand buswidth logic to match hardware default configuration
  at91: Use "pclk" as con_id on at91cap9 and at91rm9200
  at91: fix udc, ehci and mmc clock device name for cap9/9g45/9rl
  atmel_serial: fix internal port num
  at91: fix at91_set_serial_console: use platform device id

13 years agoMerge branch 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 4 Jul 2011 22:53:53 +0000 (15:53 -0700)]
Merge branch 'fbdev-fixes-for-linus' of git://git./linux/kernel/git/lethal/fbdev-3.x

* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-3.x:
  vesafb: fix memory leak
  fbdev: amba: Link fb device to its parent
  fsl-diu-fb: remove check for pixel clock ranges
  udlfb: Correct sub-optimal resolution selection.
  hecubafb: add module_put on error path in hecubafb_probe()
  sm501fb: fix section mismatch warning
  gx1fb: Fix section mismatch warnings
  fbdev: sh_mobile_meram: Correct pointer check for YCbCr chroma plane

13 years agoRDMA: Check for NULL mode in .devnode methods
Goldwyn Rodrigues [Mon, 4 Jul 2011 16:26:57 +0000 (09:26 -0700)]
RDMA: Check for NULL mode in .devnode methods

Commits 71c29bd5c235 ("IB/uverbs: Add devnode method to set path/mode")
and c3af0980ce01 ("IB: Add devnode methods to cm_class and umad_class")
added devnode methods that set the mode.

However, these methods don't check for a NULL mode, and so we get a
crash when unloading modules because devtmpfs_delete_node() calls
device_get_devnode() with mode == NULL.

Add the missing checks.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
[ Also fix cm.c.  - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoAT91: Change nand buswidth logic to match hardware default configuration
Nicolas Ferre [Fri, 1 Jul 2011 10:25:24 +0000 (12:25 +0200)]
AT91: Change nand buswidth logic to match hardware default configuration

The recently modified nand buswitth configuration is not aligned with
board reality: the double footprint on boards is always populated with 8bits
buswidth nand flashes.
So we have to consider that without particular configuration the 8bits
buswidth is selected by default.
Moreover, the previous logic was always using !board_have_nand_8bit(), we
change it to a simpler: board_have_nand_16bit().

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
13 years agovesafb: fix memory leak
Daniel J Blueman [Mon, 27 Jun 2011 23:08:53 +0000 (23:08 +0000)]
vesafb: fix memory leak

When releasing framebuffer, free colourmap allocations.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agoMerge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspe...
Linus Torvalds [Sun, 3 Jul 2011 20:33:16 +0000 (13:33 -0700)]
Merge branch 'pm-fixes' of git://git./linux/kernel/git/rafael/suspend-2.6

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Runtime: Update documentation regarding driver removal
  PM: Documentation: fix typo: pm_runtime_idle_sync() doesn't exist.

13 years ago[SCSI] isci: fix checkpatch errors
James Bottomley [Sun, 3 Jul 2011 19:14:45 +0000 (14:14 -0500)]
[SCSI] isci: fix checkpatch errors

Signed-off-by: James Bottomley <JBottomley@Parallels.com>
13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/djbw/isci
James Bottomley [Sun, 3 Jul 2011 19:19:29 +0000 (14:19 -0500)]
Merge git://git./linux/kernel/git/djbw/isci

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
Linus Torvalds [Sun, 3 Jul 2011 18:12:21 +0000 (11:12 -0700)]
Merge git://git./linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  cifs: set socket send and receive timeouts before attempting connect

13 years agoMerge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
Linus Torvalds [Sun, 3 Jul 2011 18:12:06 +0000 (11:12 -0700)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (k10temp) Update documentation for Fam12h
  hwmon-vid: Fix typo in VIA CPU name
  hwmon: (f71882fg) Add support for the F71869A
  hwmon: Use <> rather than () around my e-mail address
  hwmon: (emc6w201) Properly handle all errors

13 years agohwmon: (k10temp) Update documentation for Fam12h
Clemens Ladisch [Sun, 3 Jul 2011 11:32:54 +0000 (13:32 +0200)]
hwmon: (k10temp) Update documentation for Fam12h

Add some CPU series IDs and links to the Fam12h datasheets.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
13 years agohwmon-vid: Fix typo in VIA CPU name
Jean Delvare [Sun, 3 Jul 2011 11:32:54 +0000 (13:32 +0200)]
hwmon-vid: Fix typo in VIA CPU name

It's Nehemiah, not Nemiah.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
13 years agohwmon: (f71882fg) Add support for the F71869A
Hans de Goede [Sun, 3 Jul 2011 11:32:53 +0000 (13:32 +0200)]
hwmon: (f71882fg) Add support for the F71869A

The F71869A is almost the same as the F71869F/E, except that it has
the normal number of temp and pwm zones for a F71882FG derived chip,
rather then the limited number of the F71869F/E.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Max Baldwin <archerseven@gmail.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
13 years agohwmon: Use <> rather than () around my e-mail address
Hans de Goede [Sun, 3 Jul 2011 11:32:53 +0000 (13:32 +0200)]
hwmon: Use <> rather than () around my e-mail address

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
13 years agohwmon: (emc6w201) Properly handle all errors
Jean Delvare [Sun, 3 Jul 2011 11:32:53 +0000 (13:32 +0200)]
hwmon: (emc6w201) Properly handle all errors

Handle errors on 8-bit register reads and writes too. Also use likely
and unlikely to make the functions faster on success.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
13 years agoisci: Device reset should request sas_phy_reset(phy, true)
Jeff Skirvin [Fri, 1 Jul 2011 20:03:44 +0000 (13:03 -0700)]
isci: Device reset should request sas_phy_reset(phy, true)

The hard_reset parameter passed to the LLDD in the direct-attached
phy control case allows the LLDD to filter link failure events
while the direct-attached device reset is executing.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: pare back error messsages
Dan Williams [Fri, 1 Jul 2011 19:07:25 +0000 (12:07 -0700)]
isci: pare back error messsages

The messages emitted from task.c and some from request.c likely
duplicate (in a less undertandable way) what is reported by the
midlayer.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: cleanup silicon revision detection
Dan Williams [Fri, 1 Jul 2011 18:41:21 +0000 (11:41 -0700)]
isci: cleanup silicon revision detection

Perform checking per-pci device (even though all systems will only have
1 pci device in this generation), and delete support for silicon that
does not report a proper revision (i.e. A0).

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: merge scu_unsolicited_frame.h into unsolicited_frame_control.h
Dan Williams [Fri, 1 Jul 2011 18:15:12 +0000 (11:15 -0700)]
isci: merge scu_unsolicited_frame.h into unsolicited_frame_control.h

Does not need its own file.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: merge sata.[ch] into request.c
Dan Williams [Fri, 1 Jul 2011 17:52:55 +0000 (10:52 -0700)]
isci: merge sata.[ch] into request.c

Undo some needless separation.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: kill 'get/set' macros
Dan Williams [Fri, 1 Jul 2011 09:25:15 +0000 (02:25 -0700)]
isci: kill 'get/set' macros

Most of these simple dereference macros are longer than their open coded
equivalent.  Deleting enum sci_controller_mode is thrown in for good
measure.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: retire scic_sds_ and scic_ prefixes
Dan Williams [Fri, 1 Jul 2011 02:14:33 +0000 (19:14 -0700)]
isci: retire scic_sds_ and scic_ prefixes

The distinction between scic_sds_ scic_ and sci_ are no longer relevant
so just unify the prefixes on sci_.  The distinction between isci_ and
sci_ is historically significant, and useful for comparing the old
'core' to the current Linux driver. 'sci_' represents the former core as
well as the routines that are closer to the hardware and protocol than
their 'isci_' brethren. sci == sas controller interface.

Also unwind the 'sds1' out of the parameter structs.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify isci_host and scic_sds_controller
Dan Williams [Fri, 1 Jul 2011 00:38:32 +0000 (17:38 -0700)]
isci: unify isci_host and scic_sds_controller

Remove the distinction between these two implementations and unify on
isci_host (local instances named ihost).  Hmmm, we had two
'oem_parameters' instances, one was unused... nice.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify isci_remote_device and scic_sds_remote_device
Dan Williams [Thu, 30 Jun 2011 23:31:37 +0000 (16:31 -0700)]
isci: unify isci_remote_device and scic_sds_remote_device

Remove the distinction between these two implementations and unify on
isci_remote_device (local instances named idev).

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify isci_port and scic_sds_port
Dan Williams [Wed, 29 Jun 2011 20:09:25 +0000 (13:09 -0700)]
isci: unify isci_port and scic_sds_port

Remove the distinction between these two implementations and unify on
isci_port (local instances named iport).  The duplicate '->owning_port' and
'->isci_port' in both isci_phy and isci_remote_device will be fixed in a later
patch... this is just the straightforward rename/unification.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix scic_sds_remote_device_terminate_requests
Dan Williams [Wed, 29 Jun 2011 16:45:48 +0000 (09:45 -0700)]
isci: fix scic_sds_remote_device_terminate_requests

Commit 0815632 "isci: unify remote_device stop_handlers" introduced the
possibility that not all requests get terminated if we reach the
request_count.  Now that we properly reference count devices we don't
need this self-defense and can do the straightforward scan of all active
requests.

Reported-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Acked-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify isci_phy and scic_sds_phy
Dan Williams [Tue, 28 Jun 2011 22:05:53 +0000 (15:05 -0700)]
isci: unify isci_phy and scic_sds_phy

They are one in the same object so remove the distinction.  The near
duplicate fields (owning_port, and isci_port) will be cleaned up
after the scic_sds_port isci_port unification.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify isci_request and scic_sds_request
Dan Williams [Mon, 27 Jun 2011 21:57:03 +0000 (14:57 -0700)]
isci: unify isci_request and scic_sds_request

They are one in the same object so remove the distinction.  The near
duplicate fields (owning_controller, and isci_host) will be cleaned up
after the scic_sds_contoller isci_host unification.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: rename / clean up scic_sds_stp_request
Dan Williams [Mon, 27 Jun 2011 18:56:41 +0000 (11:56 -0700)]
isci: rename / clean up scic_sds_stp_request

* Rename scic_sds_stp_request to isci_stp_request
* Remove the unused fields and union indirection

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: preallocate requests
Dan Williams [Fri, 17 Jun 2011 21:18:39 +0000 (14:18 -0700)]
isci: preallocate requests

the dma_pool interface is optimized for object_size << page_size which
is not the case with isci_request objects and the dma_pool routines show
up in the top of the profile.

The old io_request_table which tracked whether tci slots were in-flight
or not is replaced with an IREQ_ACTIVE flag per request.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: combine request flags
Dan Williams [Thu, 23 Jun 2011 21:33:48 +0000 (14:33 -0700)]
isci: combine request flags

Combine three bools into one unsigned long 'flags'.  Doesn't increase the
request size due to packing. (to do: optimize the structure layout).

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: unify can_queue tracking on the tci_pool, uplevel tag assignment
Dan Williams [Tue, 28 Jun 2011 20:47:09 +0000 (13:47 -0700)]
isci: unify can_queue tracking on the tci_pool, uplevel tag assignment

The tci_pool tracks our outstanding command slots which are also the 'index'
portion of our tags.  Grabbing the tag early in ->lldd_execute_task let's us
drop the isci_host_can_queue() and ->was_tag_assigned_by_user infrastructure.
->was_tag_assigned_by_user required the task context to be duplicated in
request-local buffer.  With the tci established early we can build the
task_context directly into its final location and skip a memcpy.

With the task context buffer at a known address at request construction we
have the opportunity/obligation to also fix sgl handling.  This rework feels
like it belongs in another patch but the sgl handling and task_context are too
intertwined.
1/ fix the 'ab' pair embedded in the task context to point to the 'cd' pair in
   the task context (previously we were prematurely linking to the staging
   buffer).
2/ fix the broken iteration of pio sgls that assumes all sgls are relative to
   the request, and does a dangerous looking reverse lookup of physical
   address to virtual address.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: Terminate dev requests on FIS err bit rx in NCQ
Jeff Skirvin [Fri, 24 Jun 2011 00:09:02 +0000 (17:09 -0700)]
isci: Terminate dev requests on FIS err bit rx in NCQ

When the remote device transitions to a not-ready state because of
an NCQ error condition, all outstanding requests to that device
are terminated and completed to libsas on the normal path.  The
device then waits for a READ LOG EXT command to issue on the task
management path.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix frame received locking
Dan Williams [Fri, 24 Jun 2011 06:44:52 +0000 (23:44 -0700)]
isci: fix frame received locking

Updates to the frame_rcvd before need to be atomic with respect to when
they are evaluated by libsas.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: possible buffer overflow in isci_parse_oem_parameters fixed
Maciej Patelczyk [Tue, 21 Jun 2011 22:03:13 +0000 (22:03 +0000)]
isci: possible buffer overflow in isci_parse_oem_parameters fixed

scu_index is a parameter of isci_parse_eom_parameters and is an index
in controller table. There is a check: scu_index > SCI_MAX_CONTROLLERS
which is insufficient and should be: scu_index >= SCI_MAX_CONTROLLERS.
scu_index is used as an index in the table which size is
SCI_MAX_CONTROLLERS.

Signed-off-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix isci_task_execute_tmf completion
Dan Williams [Tue, 21 Jun 2011 23:23:03 +0000 (16:23 -0700)]
isci: fix isci_task_execute_tmf completion

1/ fix the timeout for wait_for_completion_timeout
2/ In the tmf timeout case we need to wait for our termination callback
3/ Once the request is successfully started it will be freed according to the
   normal lifetime for requests.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix support for arbitrarily large smp requests
Dan Williams [Thu, 16 Jun 2011 23:59:56 +0000 (16:59 -0700)]
isci: fix support for arbitrarily large smp requests

Instead of duplicating the smp request buffer reuse the one provided by
libsas.  This future proofs the driver to support arbitrarily large smp
requests, and shrinks the request structure size by ~700 bytes.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix dma_unmap_sg usage
Dan Williams [Fri, 17 Jun 2011 17:40:43 +0000 (10:40 -0700)]
isci: fix dma_unmap_sg usage

One bug and a cleanup:
1/ Fix cases where we were unmapping invalid addresses (smp requests were
   being unmapped)

[  604.662770] ------------[ cut here ]------------
[  604.668026] WARNING: at lib/dma-debug.c:800 check_unmap+0x418/0x740()
[  604.675315] Hardware name: SandyBridge Platform
[  604.680465] isci 0000:03:00.0: DMA-API: device driver tries to free an invalid DMA memory address

2/ The unmap routine is too large to be an inline function, and
   isci_request_io_request_get_next_sge is unused.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix smp response frame overrun
Dan Williams [Fri, 17 Jun 2011 00:20:35 +0000 (17:20 -0700)]
isci: fix smp response frame overrun

Due to a typo we currently copy way too much when copying over the
response data, but since a request is likely backed by a full page
allocation we don't corrupt live data.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: kill device_sequence
Dan Williams [Fri, 17 Jun 2011 20:34:43 +0000 (13:34 -0700)]
isci: kill device_sequence

Now that we have upleveled device reassignment protection to the
isci_remote_device reference count we no longer need this level of
self-defense.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: kill isci_remote_device_change_state()
Dan Williams [Thu, 16 Jun 2011 18:26:12 +0000 (11:26 -0700)]
isci: kill isci_remote_device_change_state()

Now that "stopping/stopped" are one in the same and signalled by a NULL device
pointer the rest of the device status infrastructure can be removed (->status
and ->state_lock).  The "not ready for i/o state" is replaced with a state
flag, and is evaluated under scic_lock so that we don't see transients from
taking the device reference to submitting the i/o.

This also fixes a potential leakage of can_queue slots in the rare case that
SAS_TASK_ABORTED is set at submission.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: atomic device lookup and reference counting
Dan Williams [Tue, 14 Jun 2011 00:39:44 +0000 (17:39 -0700)]
isci: atomic device lookup and reference counting

We have unsafe references to remote devices that are notified to
disappear at lldd_dev_gone.  In order to clean this up we need a single
canonical source for device lookups and stable references once a lookup
succeeds.  Towards that end guarantee that domain_device.lldd_dev is
NULL as soon as we start the process of stopping a device.  Any code
path that wants to safely lookup a remote device must do so through
task->dev->lldd_dev (isci_lookup_device()).

For in-flight references outside of scic_lock we need reference counting
to ensure that the device is not recycled before we are done with it.
Simplify device back references to just scic_sds_request.target_device
which is now the only permissible internal reference that is maintained
relative to the reference count.

There were two occasions where we wanted new i/o's to be treated as
SAS_TASK_UNDELIVERED but where the domain_dev->lldd_dev link is still
intact.  Introduce a 'gone' flag to prevent i/o while waiting for libsas
to take action on the port down event.

One 'core' leftover is that we currently call
scic_remote_device_destruct() from isci_remote_device_deconstruct()
which is called when the 'core' says the device is stopped.  It would be
more natural for the final put to trigger
isci_remote_device_deconstruct() but this implementation is deferred as
it requires other changes.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
13 years agoisci: fix ssp response iu buffer size in isci_tmf
Dan Williams [Wed, 15 Jun 2011 18:11:03 +0000 (11:11 -0700)]
isci: fix ssp response iu buffer size in isci_tmf

In isci_task_request_complete() we save the response/sense data from the
command.  Make sure isci_tmf has enough space to hold the full response.

[ it does not look like we actually use this data, and
  response_data_len/sense_data_len should be specifying the byte count,
  in any event do the simple fix first so we don't corrupt memory ]

Reported-by: Adam Gruchala <adam.gruchala@intel.com>
Tested-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>