JIRA: https://issues.redhat.com/browse/RHEL-50013
commit cb347bd29d0d106213a0cf4f86b72dffd08d3454
Author: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date: Sun Aug 25 19:17:02 2024 +0300
wifi: iwlwifi: mvm: fix hibernation
Fast resume is a feature that was recently introduced to speed up the
resume time. It basically keeps the firmware alive while the system
is suspended and that avoids starting again the whole device.
This flow can't work for hibernation, since when the system boots,
before the frozen image is loaded, the kernel may touch the device. As a
result, we can't assume the device is in the exact same state as before
the hibernation.
Detect that we are resuming from hibernation through the PCI device and
forbid the fast resume flow. We also need to shut down the device
cleanly when that happens.
In addition, in case the device is power gated during S3, we won't be
able to keep the device alive. Detect this situation with BE200 at least
with the help of the CSR_FUNC_SCRATCH register and reset the device upon
resume if it was power gated during S3.
Fixes: e8bb19c1d590 ("wifi: iwlwifi: support fast resume")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240825191257.24eb3b19e74f.I3837810318dbef0a0a773cf4c4fcf89cdc6fdbd3@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-34696
commit a20ac99b5f5ee768866b42d28138d90d89158042
Author: Johannes Berg <johannes.berg@intel.com>
Date: Mon Feb 5 00:06:05 2024 +0200
wifi: iwlwifi: pcie: don't allow hw-rfkill to stop device on gen2
On new devices the HW rfkill shutdown doesn't need to be handled
"as fast as possible", so disallow the immediate shutdown mode
here via documentation and a warning.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240204235836.794c5387e67e.I064365428815ec3135afa345fbbde78449b60203@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-28754
commit 14c1b6f430e3582b3ef2ce1e3016de829b520f77
Author: Johannes Berg <johannes.berg@intel.com>
Date: Thu Dec 7 04:50:15 2023 +0200
wifi: iwlwifi: remove async command callback
There's only one user of this code, which is STA unblock
during sleep for uAPSD on really old devices. Instead of
having this all through the API with calls up and down,
just implemented a special-case CMD_BLOCK_TXQS flag for
this, it's only needed in the old gen1 transport.
While at it, fix a complain that lockdep would have, as
we lock the cmd queue and then the TXQs in the reclaim
by using spin_lock_nested(). We no longer need to disable
BHs in iwl_trans_pcie_block_txq_ptrs() since it's called
with them disabled already.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20231207044813.2bd95e0570fc.I16486dbc82570d2f73a585872f5394698627310d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2033354
commit b8221b0f750a05a7ae9cbca84932e2a36a3ee658
Author: Johannes Berg <johannes.berg@intel.com>
Date: Mon Aug 2 17:09:39 2021 +0300
iwlwifi: prepare for synchronous error dumps
In some cases it may be necessary to synchronously create
a firmware error report, add the necessary infrastructure
for this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210802170640.481b6642f0fc.I7c9c958408a285e3d19aceed2a5a3341cfc08382@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Íñigo Huguet <ihuguet@redhat.com>
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200507185538.GA14674@embeddedor
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Remove the now unneeded functions that called those from the
transport layer.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The Free Software Foundation address is superfluous and causes
checkpatch to issue a warning when present. Remove all paragraphs
with FSF's address to prevent that.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The Free Software Foundation's address shouldn't be in the license
notice anymore, and some of our check scripts complain about it
(via checkpatch.pl). Remove the address to silence it.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
ilw@linux.intel.com is not available anymore.
linuxwifi@intel.com should be used instead.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This allows the op_mode to request from the transport to
call a callback when an ASYNC commands is completed by
the firmware. The same callback will be called for all the
commands. Pass the command whose response triggers the
callback as a parameter to the callback itself.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Jose Ignacio Tornos Martinez
Íñigo Huguet
Johannes Berg
Mordechay Goodstein
Gustavo A. R. Silva
Emmanuel Grumbach
Luca Coelho
Golan Ben Ami
Kalle Valo