Commit Graph

178 Commits

Author SHA1 Message Date
Bjorn Andersson
9fe69a725e rpmsg: glink-smem: Name the edge based on parent remoteproc
Naming the glink edge device on the parent of_node short name causes
collisions when multiple remoteproc instances with only different unit
address are described on the platform_bus in DeviceTree.

Base the edge's name on the parent remoteproc's name instead, to ensure
that it's unique.

Reviewed-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-09-17 15:33:31 -07:00
Gustavo A. R. Silva
61c65f47f3 rpmsg: glink: Use struct_size() helper
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:

struct {
	...
	struct intent_pair intents[];
} __packed * msg;

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

So, replace the following form:

sizeof(*msg) + sizeof(struct intent_pair) * count

with:

struct_size(msg, intents, count)

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-08-29 11:24:31 -07:00
Suman Anna
de4064af76 rpmsg: virtio_rpmsg_bus: replace "%p" with "%pK"
The virtio_rpmsg_bus driver uses the "%p" format-specifier for
printing the vring buffer address. This prints only a hashed
pointer even for previliged users. Use "%pK" instead so that
the address can be printed during debug using kptr_restrict
sysctl.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-08-27 15:21:05 -07:00
Pierre-Louis Bossart
9ff166def8 rpmsg: core: fix comments
Minor typos, grammar and copy/paste issues. Fix for consistency. No
functional or semantic change.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-08-26 23:08:25 -07:00
Pi-Hsun Shih
54119bc111 rpmsg: core: Make remove handler for rpmsg driver optional.
Most other bus (for example, SPI, i2c) have the remove handler for
driver optional. Make remove handler for rpmsg driver optional too.

Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-05-21 23:54:06 -07:00
Loic Pallardy
6de1c93324 rpmsg: virtio: change header file sort style
Make header files alphabetical order.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-02-20 21:15:54 -08:00
Loic Pallardy
d999b622fc rpmsg: virtio: allocate buffer from parent
Remoteproc is now capable to create one specific sub-device per
virtio link to associate a dedicated memory pool.
This implies to change device used by virtio_rpmsg for
buffer allocation from grand-parent to parent.

Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-02-20 21:15:49 -08:00
Arun Kumar Neelakantam
928002a5e9 rpmsg: glink: smem: Support rx peak for size less than 4 bytes
The current rx peak function fails to read the data if size is
less than 4bytes.

Use memcpy_fromio to support data reads of size less than 4 bytes.

Cc: stable@vger.kernel.org
Fixes: f0beb4ba9b ("rpmsg: glink: Remove chunk size word align warning")
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-10-03 17:04:32 -07:00
Colin Ian King
940c620d6a rpmsg: smd: fix memory leak on channel create
Currently a failed allocation of channel->name leads to an
immediate return without freeing channel. Fix this by setting
ret to -ENOMEM and jumping to an exit path that kfree's channel.

Detected by CoverityScan, CID#1473692 ("Resource Leak")

Fixes: 53e2822e56 ("rpmsg: Introduce Qualcomm SMD backend")
Cc: stable@vger.kernel.org
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-09-27 20:11:11 -07:00
Chris Lew
f0beb4ba9b rpmsg: glink: Remove chunk size word align warning
It is possible for the chunk sizes coming from the non RPM remote procs
to not be word aligned. Remove the alignment warning and continue to
read from the FIFO so execution is not stalled.

Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-09-01 14:00:43 -07:00
Rob Herring
c8a54c0c9a rpmsg: Convert to using %pOFn instead of device_node.name
In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: linux-remoteproc@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-08-27 20:07:15 -07:00
Bjorn Andersson
ccf45b18ce rpmsg: char: Migrate to iter versions of read and write
In order to be able to use the aio interface for writing to a rpmsg_char
the write_iter function must be implemented, so migrate to iter version
for read and write functions.

Regular read and write uses the iter methods if present and is as such
unaffected.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-08-27 17:06:57 -07:00
Arun Kumar Neelakantam
00b645e0b4 rpmsg: Add compat ioctl for rpmsg char driver
Add compat ioctl callback to support 32bit user space applications.

Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:40:23 -07:00
Chris Lew
475452fca1 rpmsg: glink: Store edge name for glink device
Channels may need to identify the edge their channel was probed for.
Store the edge name by reading the label property from device tree or
default to the node name.

Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:39:04 -07:00
Srinivas Kandagatla
fe782affd0 rpmsg: core: add support to power domains for devices
Some of the rpmsg devices need to switch on power domains to communicate
with remote processor. For example on Qualcomm DB820c platform LPASS
power domain needs to switched on for any kind of audio services.
This patch adds the missing power domain support in rpmsg core.

Without this patch attempting to play audio via QDSP on DB820c would
reboot the system.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:32:03 -07:00
Srinivas Kandagatla
82eca590cf rpmsg: smd: fix kerneldoc warnings
This patch fixes below kerneldoc warnings

qcom_smd.c:141: warning: Function parameter or member 'dev' not described in 'qcom_smd_edge'
qcom_smd.c:141: warning: Function parameter or member 'name' not described in 'qcom_smd_edge'
qcom_smd.c:141: warning: Function parameter or member 'new_channel_event' not described in 'qcom_smd_edge'
qcom_smd.c:222: warning: Function parameter or member 'qsept' not described in 'qcom_smd_channel'
qcom_smd.c:222: warning: Function parameter or member 'registered' not described in 'qcom_smd_channel'
qcom_smd.c:222: warning: Function parameter or member 'state_change_event' not described in 'qcom_smd_channel'
qcom_smd.c:222: warning: Function parameter or member 'drvdata' not described in 'qcom_smd_channel'
qcom_smd.c:737: warning: Function parameter or member 'wait' not described in '__qcom_smd_send'

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:22:23 -07:00
Srinivas Kandagatla
6f0b958427 rpmsg: glink: Fix various kerneldoc warnings.
Fix below kerneldoc warnings while building with W=1
qcom_glink_native.c:53: warning: Function parameter or member 'data' not described in 'glink_defer_cmd'
qcom_glink_native.c:75: warning: Function parameter or member 'data' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'id' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'size' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'reuse' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'in_use' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'offset' not described in 'glink_core_rx_intent'
qcom_glink_native.c:75: warning: Function parameter or member 'node' not described in 'glink_core_rx_intent'
qcom_glink_native.c:116: warning: Function parameter or member 'features' not described in 'qcom_glink'
qcom_glink_native.c:116: warning: Function parameter or member 'intentless' not described in 'qcom_glink'
qcom_glink_native.c:524: warning: Function parameter or member 'version' not described in 'qcom_glink_receive_version'
qcom_glink_native.c:524: warning: Function parameter or member 'features' not described in 'qcom_glink_receive_version'
qcom_glink_native.c:524: warning: Excess function parameter 'r_version' description in 'qcom_glink_receive_version'
qcom_glink_native.c:524: warning: Excess function parameter 'r_features' description in 'qcom_glink_receive_version'
qcom_glink_native.c:551: warning: Function parameter or member 'version' not described in 'qcom_glink_receive_version_ack'
qcom_glink_native.c:551: warning: Function parameter or member 'features' not described in 'qcom_glink_receive_version_ack'
qcom_glink_native.c:551: warning: Excess function parameter 'r_version' description in 'qcom_glink_receive_version_ack'
qcom_glink_native.c:551: warning: Excess function parameter 'r_features' description in 'qcom_glink_receive_version_ack'
qcom_glink_native.c:570: warning: bad line:                                       wire format and transmit
qcom_glink_native.c:604: warning: Function parameter or member 'intent' not described in 'qcom_glink_advertise_intent'
qcom_glink_native.c:604: warning: Excess function parameter 'size' description in 'qcom_glink_advertise_intent'
qcom_glink_native.c:710: warning: Function parameter or member 'glink' not described in 'qcom_glink_handle_intent_req'
qcom_glink_native.c:710: warning: Function parameter or member 'cid' not described in 'qcom_glink_handle_intent_req'
qcom_glink_native.c:710: warning: Function parameter or member 'size' not described in 'qcom_glink_handle_intent_req'

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:21:53 -07:00
Srinivas Kandagatla
427613ee19 rpmsg: glink: correctly annotate intent members
As intent structure members are not correctly annotated, leading to below warnings

qcom_glink_native.c:614:16: warning: incorrect type in assignment (different base types)
qcom_glink_native.c:614:16:    expected unsigned short [unsigned] [usertype] id
qcom_glink_native.c:614:16:    got restricted __le16 [usertype] <noident>
qcom_glink_native.c:615:18: warning: incorrect type in assignment (different base types)
qcom_glink_native.c:615:18:    expected unsigned short [unsigned] [usertype] lcid
qcom_glink_native.c:615:18:    got restricted __le16 [usertype] <noident>
qcom_glink_native.c:616:19: warning: incorrect type in assignment (different base types)
qcom_glink_native.c:616:19:    expected unsigned int [unsigned] [usertype] count
qcom_glink_native.c:616:19:    got restricted __le32 [usertype] <noident>
qcom_glink_native.c:617:18: warning: incorrect type in assignment (different base types)
qcom_glink_native.c:617:18:    expected unsigned int [unsigned] [usertype] size
qcom_glink_native.c:617:18:    got restricted __le32 [usertype] <noident>
qcom_glink_native.c:618:18: warning: incorrect type in assignment (different base types)
qcom_glink_native.c:618:18:    expected unsigned int [unsigned] [usertype] liid
qcom_glink_native.c:618:18:    got restricted __le32 [usertype] <noident>

Fix this by correctly annotating them.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30 23:21:36 -07:00
Niklas Cassel
67cd0eec5b rpmsg: smd: Add missing include of sizes.h
Add missing include of sizes.h.

drivers/rpmsg/qcom_smd.c: In function ‘qcom_smd_channel_open’:
drivers/rpmsg/qcom_smd.c:809:36: error: ‘SZ_4K’ undeclared (first use in this function)
  bb_size = min(channel->fifo_size, SZ_4K);
                                    ^~~~~

Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-01 23:32:21 -07:00
Srinivas Kandagatla
4a2e84c6ed rpmsg: smd: do not use mananged resources for endpoints and channels
All the managed resources would be freed by the time release function
is invoked. Handling such memory in qcom_smd_edge_release() would do
bad things.

Found this issue while testing Audio usecase where the dsp is started up
and shutdown in a loop.

This patch fixes this issue by using simple kzalloc for allocating
channel->name and channel which is then freed in qcom_smd_edge_release().

Without this patch restarting a remoteproc would crash the system.
Fixes: 53e2822e56 ("rpmsg: Introduce Qualcomm SMD backend")
Cc: <stable@vger.kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-04 12:35:03 -07:00
Suman Anna
136200f4fd rpmsg: char: Switch to SPDX license identifier
Use the appropriate SPDX license identifier in the rpmsg char driver
source file and drop the previous boilerplate license text. The uapi
header file already had the SPDX license identifier added as part of
a mass update but the license text removal was deferred for later,
and this patch drops the same.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03 17:37:16 -07:00
Suman Anna
84369fbe62 rpmsg: glink: Switch to SPDX license identifier
Use the appropriate SPDX license identifier in various rpmsg
glink driver source files and drop the previous boilerplate
license text.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03 17:37:15 -07:00
Suman Anna
49b0597825 rpmsg: smd: Switch to SPDX license identifier
Use the appropriate SPDX license identifier in the rpmsg SMD backend
driver source file and drop the previous boilerplate license text.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03 17:37:14 -07:00
Suman Anna
c3bab82466 rpmsg: virtio_rpmsg_bus: Switch to SPDX license identifier
Use the appropriate SPDX license identifier in the virtio rpmsg
bus driver source file and drop the previous boilerplate license
text.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03 17:37:13 -07:00
Suman Anna
3e79bfd61c rpmsg: Switch to SPDX license identifier
Use the appropriate SPDX license identifier in the rpmsg core
source files and drop the previous boilerplate license text.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03 17:37:11 -07:00
Bjorn Andersson
cc1c8445eb Linux 4.17-rc4
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Merge tag 'v4.17-rc4' into rpmsg-next

Pick up fixes from rproc-v4.17-1

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-05-09 12:00:19 -07:00
Bjorn Andersson
ab460a2e72 rpmsg: qcom_smd: Access APCS through mailbox framework
Attempt to acquire the APCS IPC through the mailbox framework and fall
back to the old syscon based approach, to allow us to move away from
using the syscon.

Reviewed-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-04-25 17:09:57 -07:00
Anup Patel
39e47767ec rpmsg: Add driver_override device attribute for rpmsg_device
This patch adds "driver_override" device attribute for rpmsg_device which
will allow users to explicitly specify the rpmsg_driver to be used via
sysfs entry.

The "driver_override" device attribute implemented here is very similar
to "driver_override" implemented for platform, pci, and amba bus types.

One important use-case of "driver_override" device attribute is to force
use of rpmsg_chrdev driver for certain rpmsg_device instances.

Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-04-25 16:59:53 -07:00
Ramon Fried
93dd4e73c0 rpmsg: added MODULE_ALIAS for rpmsg_char
Added "rpmsg:rpmsg_chrdev" MODULE_ALIAS to autoload
rpmg_chrdev module automatically.

Signed-off-by: Ramon Fried <rfried@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-04-25 16:46:55 -07:00
Bjorn Andersson
0d72038c30 rpmsg: smd: Use announce_create to process any receive work
It is possible that incoming data arrives before the client driver has
reached a point in the probe method where adequate context for handling
the incoming message has been established.

In the event that the client's callback function returns an error the
message will be left on the FIFO and by invoking the receive handler
after the device has been probed the message will be picked off the FIFO
and the callback invoked again.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-27 21:54:37 -07:00
Bjorn Andersson
7586516ca0 rpmsg: Only invoke announce_create for rpdev with endpoints
For special rpmsg devices without a primary endpoint there is nothing to
announce so don't call the backend announce create function if we didn't
create an endpoint.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-27 21:54:36 -07:00
Bjorn Andersson
6ddf12d397 rpmsg: smd: Fix container_of macros
The container_of macros should not use the same name for the parameter
as the member to use for lookup, as this will result in a compilation
error unless the passed parameter has the same name as the member.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-27 21:54:35 -07:00
Bjorn Andersson
2bd9b4385f Revert "rpmsg: smd: Create device for all channels"
In an effort to pick up channels that are in a funky state we
optimistically tried to open all channels that we found, with the
addition that we failed if the other side did not handshake the opening.

But as we're starting the modem a second time all channels are found -
in a "funky" state - and we try to open them. But the modem firmware
requires the IPCRTR to be up in order to initialize. So any channels we
try to open before that will fail and will not be opened again.

This takes care of the regression, at the cost of reintroducing the
previous behavior of handling of channels with "funky" states.

Reverts commit c12fc4519f ("rpmsg: smd: Create device for all channels")

Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-27 12:58:16 -07:00
Bjorn Andersson
29fc9b3873 rpmsg: glink: Use spinlock in tx path
Switch the tx_lock to a spinlock we allow clients to use rpmsg_trysend()
from atomic context.

In order to allow clients to sleep while waiting for space in the FIFO
we release the lock temporarily around the delay; which should be
replaced by sending a READ_NOTIF and waiting for the remote to signal
us that space has been made available.

Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-20 10:52:54 +08:00
Bjorn Andersson
33e3820dda rpmsg: smd: Use spinlock in tx path
By switching the tx_lock to a spinlock we allow clients to use
rpmsg_trysend() from atomic context.

The mutex was interruptable as it was previously held for the duration
of some client waiting for available space in the FIFO, but this was
recently changed to only be held temporarily - allowing us to replace it
with a spinlock.

Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-20 10:52:17 +08:00
Arvind Yadav
be5acd246d rpmsg: smd: use put_device() if device_register fail
if device_register() returned an error! Always use put_device()
to give up the reference initialized. unregister device for
other return error.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-17 21:46:19 -07:00
Arvind Yadav
a9011726c4 rpmsg: glink: use put_device() if device_register fail
if device_register() returned an error! Always use put_device()
to give up the reference initialized. And unregister device for
other return error.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-17 21:45:57 -07:00
Linus Torvalds
a9a08845e9 vfs: do bulk POLL* -> EPOLL* replacement
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:

    for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
        L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
        for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
    done

with de-mangling cleanups yet to come.

NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do.  But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.

The next patch from Al will sort out the final differences, and we
should be all done.

Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-11 14:34:03 -08:00
Linus Torvalds
67fb3b92b0 rpmsg updates for v4.16
This fixes a few issues found in the SMD and GLINK drivers and corrects the
 handling of SMD channels that are found in an (previously) unexpected state.
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Merge tag 'rpmsg-v4.16' of git://github.com/andersson/remoteproc

Pull rpmsg updates from Bjorn Andersson:
 "This fixes a few issues found in the SMD and GLINK drivers and
  corrects the handling of SMD channels that are found in an
  (previously) unexpected state"

* tag 'rpmsg-v4.16' of git://github.com/andersson/remoteproc:
  rpmsg: smd: Fix double unlock in __qcom_smd_send()
  rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel()
  rpmsg: smd: Don't hold the tx lock during wait
  rpmsg: smd: Fail send on a closed channel
  rpmsg: smd: Wake up all waiters
  rpmsg: smd: Create device for all channels
  rpmsg: smd: Perform handshake during open
  rpmsg: glink: smem: Ensure ordering during tx
  drivers: rpmsg: remove duplicate includes
  remoteproc: qcom: Use PTR_ERR_OR_ZERO() in glink prob
2018-02-05 10:05:40 -08:00
Dan Carpenter
c3388a075c rpmsg: smd: Fix double unlock in __qcom_smd_send()
We're not holding the lock here, so we shouldn't unlock.

Fixes: 178f3f75bb ("rpmsg: smd: Don't hold the tx lock during wait")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[bjorn: renamed "out" label to further distinguish the two exit paths]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-01-19 07:04:33 -08:00
Wei Yongjun
fb416f6990 rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel()
qcom_glink_alloc_channel() allocates the mutex but not initialize it.
Use mutex_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-01-02 09:23:20 -08:00
Bjorn Andersson
178f3f75bb rpmsg: smd: Don't hold the tx lock during wait
Holding the tx lock while waiting for tx-drain events from the remote
side blocks try_send requests from failing quickly, so temporarily drop
the tx lock while waiting.

While this allows try_send to fail quickly it also could allow a
subsequent send to succeed putting a smaller packet in the FIFO while
we're waiting for room for our large packet. But as this lock is per
channel we expect that clients with ordering concerns implements their
own ordering mechanism.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:50:11 -08:00
Bjorn Andersson
b2c932e799 rpmsg: smd: Fail send on a closed channel
Move the check for a closed channel out from the tx-full loop to fail
any send request on a non-open channel.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:50:09 -08:00
Bjorn Andersson
eb114f27fd rpmsg: smd: Wake up all waiters
It's possible to have multiple contexts waiting for new channel events
and with an upcoming change it's possible to have multiple contexts
waiting for a full FIFO. As such we need to wake them all up.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:50:05 -08:00
Bjorn Andersson
c12fc4519f rpmsg: smd: Create device for all channels
Rather than selectively creating devices only for the channels that the
remote have moved to "opening" state let's create devices for all
channels found. The driver model will match drivers to the ones we care
about and attempt to open these.

The one case where this fails is if the user loads a firmware that lacks
a particular channel of the previous firmware that was running, in which
case we would find the old channel and attempt to probe it. The channel
opening handshake will ensure this will result in a graceful failure.

The result of this patch is that we will actively open the RPM channel
even though it's left in a state other than "opening" after the boot
loader's closing of the channel.

Tested-by: Will Newton <will.newton@gmail.com>
Reported-by: Jeremy McNicoll <jmcnicol@redhat.com>
Reported-by: Will Newton <will.newton@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:49:55 -08:00
Bjorn Andersson
268105fbc0 rpmsg: smd: Perform handshake during open
Validate the the remote side is opening the channel that we've found by
performing a handshake when opening the channel.

Tested-by: Will Newton <will.newton@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:49:32 -08:00
Bjorn Andersson
9d32497361 rpmsg: glink: smem: Ensure ordering during tx
Ensure the ordering of the fifo write and the update of the write index,
so that the index is not updated before the data has landed in the fifo.

Acked-By: Chris Lew <clew@codeaurora.org>
Reported-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18 21:47:43 -08:00
Pravin Shedge
ed608eb0be drivers: rpmsg: remove duplicate includes
These duplicate includes have been found with scripts/checkincludes.pl but
they have been removed manually to avoid removing false positives.

Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-06 13:59:14 -08:00
Al Viro
afc9a42b74 the rest of drivers/*: annotate ->poll() instances
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-11-28 11:06:58 -05:00
Linus Torvalds
bedf571986 rpmsg updates for v4.15
This turn RPMSG_VIRTIO into a user selectable config, fixes a few bugs in GLINK
 and provides the support for specifying initial buffer sizes for GLINK
 channels.
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Merge tag 'rpmsg-v4.15' of git://github.com/andersson/remoteproc

Pull rpmsg updates from Bjorn Andersson:

 - turn RPMSG_VIRTIO into a user selectable config

 - fix few bugs in GLINK

 - provide the support for specifying initial buffer sizes for GLINK
   channels.

* tag 'rpmsg-v4.15' of git://github.com/andersson/remoteproc:
  rpmsg: glink: The mbox client knows_txdone
  rpmsg: glink: Add missing MODULE_LICENSE
  rpmsg: glink: Use best fit intent during tx
  rpmsg: glink: Add support to preallocate intents
  dt-bindings: soc: qcom: Support GLINK intents
  rpmsg: glink: Initialize the "intent_req_comp" completion variable
  rpmsg: Allow RPMSG_VIRTIO to be enabled via menuconfig or defconfig
2017-11-17 20:12:08 -08:00