This is initial step of move the ME hw specifics
out of mei_device structure into mei_me_hw
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

leave misc file operations in the main
and move PCI related code into pci-me
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

On systems where wd and amthif is not initialized
we will hit cl->dev == NULL. This condition is okay
so we don't need to be laud about it.

Fixes the follwing warning during suspend
[  137.061985] WARNING: at drivers/misc/mei/client.c:315 mei_cl_unlink+0x86/0x90 [mei]()
[  137.061986] Hardware name: 530U3BI/530U4BI/530U4BH
[  137.062140] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek joydev coretemp kvm_intel snd_hda_intel snd_hda_codec kvm arc4 iwldvm snd_hwdep i915 snd_pcm mac80211 ghash_clmulni_intel snd_page_alloc aesni_intel snd_seq_midi xts snd_seq_midi_event aes_x86_64 rfcomm snd_rawmidi parport_pc bnep lrw snd_seq uvcvideo i2c_algo_bit ppdev gf128mul iwlwifi snd_timer drm_kms_helper ablk_helper cryptd drm snd_seq_device videobuf2_vmalloc psmouse videobuf2_memops snd cfg80211 btusb videobuf2_core soundcore videodev lp bluetooth samsung_laptop wmi microcode mei serio_raw mac_hid video hid_generic lpc_ich parport usbhid hid r8169
[  137.062143] Pid: 2706, comm: kworker/u:15 Tainted: G      D W    3.8.0-rc2-next20130109-1-iniza-generic #1
[  137.062144] Call Trace:
[  137.062156]  [<ffffffff8105860f>] warn_slowpath_common+0x7f/0xc0
[  137.062159]  [<ffffffff8135b1ea>] ? ioread32+0x3a/0x40
[  137.062162]  [<ffffffff8105866a>] warn_slowpath_null+0x1a/0x20
[  137.062168]  [<ffffffffa0076be6>] mei_cl_unlink+0x86/0x90 [mei]
[  137.062173]  [<ffffffffa0071325>] mei_reset+0xc5/0x240 [mei]
[  137.062178]  [<ffffffffa0073703>] mei_pci_resume+0xa3/0x110 [mei]
[  137.062183]  [<ffffffff81379cae>] pci_pm_resume+0x7e/0xe0
[  137.062185]  [<ffffffff81379c30>] ? pci_pm_thaw+0x80/0x80
[  137.062189]  [<ffffffff8145a415>] dpm_run_callback.isra.6+0x25/0x50
[  137.062192]  [<ffffffff8145a6cf>] device_resume+0x9f/0x140
[  137.062194]  [<ffffffff8145a791>] async_resume+0x21/0x50
[  137.062200]  [<ffffffff810858b0>] async_run_entry_fn+0x90/0x1c0
[  137.062203]  [<ffffffff810778e5>] process_one_work+0x155/0x460
[  137.062207]  [<ffffffff81078578>] worker_thread+0x168/0x400
[  137.062210]  [<ffffffff81078410>] ? manage_workers+0x2b0/0x2b0
[  137.062214]  [<ffffffff8107d9f0>] kthread+0xc0/0xd0
[  137.062218]  [<ffffffff8107d930>] ? flush_kthread_worker+0xb0/0xb0
[  137.062222]  [<ffffffff816bac6c>] ret_from_fork+0x7c/0xb0
[  137.062228]  [<ffffffff8107d930>] ? flush_kthread_worker+0xb0/0xb0
Reported-by: NSedat Dilek <sedat.dilek@gmail.com>
Tested-by: NSedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Let mei_device_init initialize all the software constructs.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Move csr reading into me hardware functional calls.
Since we gave up on registers caching we remove some of the unnecessary
queries in mei_hw_init ane mei_reset functions.

We add mei_hw_config function to wrap up host buffer depth configuration.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Now when mei_hcsr_set is local to hw-me.c
we can benefit form the fact that it wraps
H_IS removal from the host csr.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add mei_host_set_ready function to enable the device
and is_ready function to query the host and me readiness
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Open code mei_hw_reset to avoid using cached hcsr.
Using cached hcsr can cause unwanted side effects.

Move mei_hw_restet function to hw-me.c as it is hw dependent
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The function mei_csr_clear_his is not implemented
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

need_reset is not used anymore
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix the kernel doc for the functions in hw-me.c
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Since the amthif state is not examined until amthif is connected
we can safely move it to the amthif host init function
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In order we can use the same code pattern for in-kernel
and user space host clients we replace mei_cl_link_to_me
with mei_cl_link function.
We then have to keep me client lookupout of the new link function.

The unlinking cannot be yet symetric due to amthif connection
handling
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

the only real thing that left was mei_amthi_guid
the rest was in the strings and comments
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

mei_task_initialize_clients and mei_initialize_clients
are no longer among us
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

rename function to mei_me_cl_allocate to match the current
names convention: mei_hbm_me_cl_allocate
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

read_pending never changes, it is a leftover from the old code.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Rename hw-me.h to hw-me-regs.h as this file
contains only register definitions.
Files hw-me.[ch] now contains ME hw dependant
functionality
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

interface.h contains lower layer functionality
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Implement mei_cl_connect that warps host client
parts of the connection and leave the ioctl specifics
in the mei_ioctl_connect_client function.
Move mei_ioctl_connect_client to main.c where it
belongs
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Use common prefix for function names:

mei_cl_  - for host clients
mei_me_  - for me clients
mei_io_  - for io callback functions

Because mei_cl holds mei_device back pointer
we can also drop the dev argument from the client
functions

add client.h header to export the clients API
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This file now contains me and host client functions
and also io callback helpers
We also kill iorw.c which is no longer needed
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

hbm.h provides access host bus messaging functionality
for other MEI layers
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

1. Add common prefix mei_hbm_ to all handlers
and made them static
2. Drop now useless function  same_flow_addr
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

1. use mei_hbm_ for basic host bus message function
2. use mei_hbm_cl prefix for host bus messages that operation
on behalf of a client
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We can drop useless castings and use proper types.
We remove the casting in mei_hbm_hdr function
and add new function mei_hbm_stop_request_prepare that
utilize the new structure
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Define a new parent type mei_hbm_cl_cmd for hbm
commands that are sent on behalf of specific ME client.
This allows us compacting boilerplate code via mei_hbm_cl_hdr
function
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

mei_amthif_read_message prototype was not dropped
in one of the moving/renaming patches
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

for sake of more layered design we move host
bus message handling to the new hbm.c file
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

1. move direct register handling to interface.c and make them static
2. add new function mei_clear_interrupts that wraps direct register
access
3. export other functions in mei_dev.h
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Move struct mei_me_client from hw.h to mei_dev.h as it is not
part of the hardware API. The structutre doesn't have to
be packed. Add kdoc for this structure.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

1. mem_base and mem_length are not used so we can delete
them
2. add kdoc for mem_addr member of mei_device
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

first include linux/mei.h then only local headers
to avoid possible false dependencies
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Internal clients numbers are implementation choice
and not defined by the hardware.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Introduce MEI_HDR_FMT and MEI_HDR_PRM macros.
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The length is already part of the message header and it is validated
before the function call
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Users of mei_amthif_read() expect it leaves dev->device_lock held,
while there is a path where mei_amthif_read() unlocks device_lock
and returns -ERESTARTSYS.

The patch move code locking device_lock back before the return.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>