Currently wr_msg_ctl_info is used in ishtp_device just for list head
purpose, using list_head directly can save ~150 bytes size for
each replacement.
Also this patch can save ~170 bytes of code size in intel-ish-ipc.ko.
Signed-off-by: Hong Liu <hong.liu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Added two APIs:
- ishtp_cl_get_tx_free_buffer_size:
This returns total size available for a client to queue TX data.
- ishtp_cl_get_tx_free_rings:
This returns total number of TX rings available for a client.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Add helper function ishtp_set_drvdata() and ishtp_get_drvdata() for
different ISH client drivers to set/get private driver data.
Signed-off-by: Even Xu <even.xu@intel.com>
Reviewed-by: Andriy Shevchenko <andriy.shevchenko@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Variable num_frags is being assigned but is never used hence it is
redundant and can be removed.
Cleans up clang warning:
warning: variable 'num_frags' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Never directly free @dev after calling device_register(), even
if it returned an error. Always use put_device() to give up the
reference initialized.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Pull HID updates from Jiri Kosina:
- open/close tracking improvements from Dmitry Torokhov
- battery support improvements in Wacom driver from Jason Gerecke
- Win8 support fixes from Benjamin Tissories and Hans de Geode
- misc fixes to Intel-ISH driver from Arnd Bergmann
- support for quite a few new devices and small assorted fixes here and
there
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (35 commits)
HID: intel-ish-hid: Enable Gemini Lake ish driver
HID: intel-ish-hid: Enable Cannon Lake ish driver
HID: wacom: fix mistake in printk
HID: multitouch: optimize the sticky fingers timer
HID: multitouch: fix rare Win 8 cases when the touch up event gets missing
HID: multitouch: use BIT macro
HID: Add driver for Retrode2 joypad adapter
HID: multitouch: Add support for Google Rose Touchpad
HID: multitouch: Support PTP Stick and Touchpad device
HID: core: don't use negative operands when shift
HID: apple: Use country code to detect ISO keyboards
HID: remove no longer used hid->open field
greybus: hid: remove custom locking from gb_hid_open/close
HID: usbhid: remove custom locking from usbhid_open/close
HID: i2c-hid: remove custom locking from i2c_hid_open/close
HID: serialize hid_hw_open and hid_hw_close
HID: usbhid: do not rely on hid->open when deciding to do IO
HID: hiddev: use hid_hw_power instead of usbhid_get/put_power
HID: hiddev: use hid_hw_open/close instead of usbhid_open/close
HID: asus: Add support for Zen AiO MD-5110 keyboard
...
The dev_attrs field has long been "depreciated" and is finally being
removed, so move the driver to use the "correct" dev_groups field
instead for struct bus_type.
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Wei Yongjun <weiyj.lk@gmail.com>
Cc: Bhumika Goyal <bhumirks@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: <linux-input@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The internal accounting uses 'timespec' based time stamps, which is
slightly inefficient and also problematic once we get to the time_t
overflow in 2038.
When communicating to the firmware, we even get an open-coded 64-bit
division that prevents the code from being build-tested on 32-bit
architectures and is inefficient due to the double conversion from
64-bit nanoseconds to seconds+nanoseconds and then microseconds.
This changes the code to use ktime_t instead.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
I was trying to understand this code while working on a warning
fix and the locking made no sense: spin_lock_irqsave() is pointless
when run inside of an interrupt handler or nested inside of another
spin_lock_irq() or spin_lock_irqsave().
Here it turned out that the comment above the function is wrong,
as both recv_ishtp_cl_msg_dma() and recv_ishtp_cl_msg() can in fact
be called from a work queue rather than an ISR, so we do have to
use the irqsave() version once.
This fixes the comments accordingly, removes the misleading 'dev_flags'
variable and modifies the inner spinlock to not use 'irqsave'.
No functional change is intended, this is just for readability and
it slightly simplifies the object code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
gcc points out an uninialized pointer dereference that could happen
if we ever get to recv_ishtp_cl_msg_dma() or recv_ishtp_cl_msg()
with an empty &dev->read_list:
drivers/hid/intel-ish-hid/ishtp/client.c: In function 'recv_ishtp_cl_msg_dma':
drivers/hid/intel-ish-hid/ishtp/client.c:1049:3: error: 'cl' may be used uninitialized in this function [-Werror=maybe-uninitialized]
The warning only appeared in very few randconfig builds, as the
spinlocks tend to prevent gcc from tracing the variables. I only
saw it in configurations that had neither SMP nor LOCKDEP enabled.
As we can see, we only enter the case if 'complete_rb' is non-NULL,
and then 'cl' is known to point to complete_rb->cl. Adding another
initialization to the same pointer is harmless here and makes it
clear to the compiler that the behavior is well-defined.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Declare device_type structure as const as it is only stored in the
type field of a device structure. This field is of type const, so add
const to the declaration of device_type structure.
File size before: drivers/hid/intel-ish-hid/ishtp/bus.o
text data bss dec hex filename
4260 336 16 4612 1204 hid/intel-ish-hid/ishtp/bus.o
File size after: drivers/hid/intel-ish-hid/ishtp/bus.o
text data bss dec hex filename
4324 272 16 4612 1204 hid/intel-ish-hid/ishtp/bus.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Structure ishtp_device contains a logging function, print_log(), which
formats some of its parameters using vsnprintf(). Add a __printf
attribute to this function field (and to ish_event_tracer()) in order to
detect at compile time issues related to the printf-like formatting.
While at it, make format parameter a const pointer as print_log() is not
supposed to modify it.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
hid/intel-ish-hid does not use any miscdevice so this patch remove
this unnecessary inclusion.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
We have the %pU printf extension for doing exactly this. Saves some
.text, and is likely also a little faster.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Although unlikely but it is possible that when a connect or disconnect
request is issued to the firmware, before the response comes, user
terminates the client session. In this case when the response is arrived
there is no matching client instance in the list of currently active
clients. In this case, don't issue call to wake up a waiting client.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Use kzalloc rather than kmalloc followed by memset with 0.
Generated by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The ISH transport layer (ishtp) is a bi-directional protocol implemented
on the top of PCI based inter processor communication layer. This layer
offers:
- Connection management
- Flow control with the firmware
- Multiple client sessions
- Client message transfer
- Client message reception
- DMA for RX and TX for fast data transfer
Refer to Documentation/hid/intel-ish-hid.txt for
overview of the functionality implemented in this layer.
Original-author: Daniel Drubin <daniel.drubin@intel.com>
Reviewed-and-tested-by: Ooi, Joyce <joyce.ooi@intel.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Rann Bar-On <rb6@duke.edu>
Tested-by: Atri Bhattacharya <badshah400@aim.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
