As said by Linus:
A symmetric naming is only helpful if it implies symmetries in use.
Otherwise it's actively misleading.
In "kzalloc()", the z is meaningful and an important part of what the
caller wants.
In "kzfree()", the z is actively detrimental, because maybe in the
future we really _might_ want to use that "memfill(0xdeadbeef)" or
something. The "zero" part of the interface isn't even _relevant_.
The main reason that kzfree() exists is to clear sensitive information
that should not be leaked to other future users of the same memory
objects.
Rename kzfree() to kfree_sensitive() to follow the example of the recently
added kvfree_sensitive() and make the intention of the API more explicit.
In addition, memzero_explicit() is used to clear the memory to make sure
that it won't get optimized away by the compiler.
The renaming is done by using the command sequence:
git grep -w --name-only kzfree |\
xargs sed -i 's/kzfree/kfree_sensitive/'
followed by some editing of the kfree_sensitive() kerneldoc and adding
a kzfree backward compatibility macro in slab.h.
[akpm@linux-foundation.org: fs/crypto/inline_crypt.c needs linux/slab.h]
[akpm@linux-foundation.org: fix fs/crypto/inline_crypt.c some more]
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Joe Perches <joe@perches.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Jason A . Donenfeld" <Jason@zx2c4.com>
Link: http://lkml.kernel.org/r/20200616154311.12314-3-longman@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We don't want to have txq code in the PCIe transport code, so move all
the relevant elements to a new iwl_txq structure and store it in
iwl_trans.
spatch
@ replace_pcie @
struct iwl_trans_pcie *trans_pcie;
@@
(
-trans_pcie->queue_stopped
+trans->txqs.queue_stopped
|
-trans_pcie->queue_used
+trans->txqs.queue_used
|
-trans_pcie->txq
+trans->txqs.txq
|
-trans_pcie->txq
+trans->txqs.txq
|
-trans_pcie->cmd_queue
+trans->txqs.cmd.q_id
|
-trans_pcie->cmd_fifo
+trans->txqs.cmd.fifo
|
-trans_pcie->cmd_q_wdg_timeout
+trans->txqs.cmd.wdg_timeout
)
// clean all new unused variables
@ depends on replace_pcie @
type T;
identifier i;
expression E;
@@
- T i = E;
... when != i
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200529092401.a428d3c9d66f.Ie04ae55f33954636a39c98e7ae1e739c0507435b@changeid
We don't really expect fragmented RBs, and don't seem to be seeing
them in practice since that would've caused a crash. Nevertheless,
we should be expecting the hardware to send them.
Parse the flag indicating a fragmented buffer, but then discard it
and any fragments thereof, at least for now. We need to do more
work in the higher layers to properly deal with this, since we may
not get "normal" firmware notifications that are fragmented, only
RX, and then we need to put it back together and add the necessary
API to report a chain of things to the higher layers, this doesn't
fit into the struct iwl_rx_cmd_buffer today.
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.20200425130140.e78a59f70b1d.Ica656a98a4e4220d73edc97600edd680cbc97241@changeid
These values are selected based on the PCI device ID, so the decision
to use them can be made early. By moving them to the trans_cfg, we
avoid duplicating the large cfg structs for small pieces of
data (sometimes a single boolean). This will also allow us to make
more decisions based on, for instance, the SoC type in used.
The trans_cfg concept changes a bit, because previously it was used
only to boot the device before reading further characteristics and now
it also contains more data that is associated with the device ID.
Change-Id: Ib71b07ea9e322eb74571dc5e8aa58f17eece5c9c
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Second set of patches for v5.6. Nothing special standing out, smaller
new features and fixes allover.
Major changes:
ar5523
* add support for SMCWUSBT-G2 USB device
iwlwifi
* support new versions of the FTM FW APIs
* support new version of the beacon template FW API
* print some extra information when the driver is loaded
rtw88
* support wowlan feature for 8822c
* add support for WIPHY_WOWLAN_NET_DETECT
brcmfmac
* add initial support for monitor mode
qtnfmac
* add module parameter to enable DFS offloading in firmware
* add support for STA HE rates
* add support for TWT responder and spatial reuse
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Merge tag 'wireless-drivers-next-2020-01-26' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers-next patches for v5.6
Second set of patches for v5.6. Nothing special standing out, smaller
new features and fixes allover.
Major changes:
ar5523
* add support for SMCWUSBT-G2 USB device
iwlwifi
* support new versions of the FTM FW APIs
* support new version of the beacon template FW API
* print some extra information when the driver is loaded
rtw88
* support wowlan feature for 8822c
* add support for WIPHY_WOWLAN_NET_DETECT
brcmfmac
* add initial support for monitor mode
qtnfmac
* add module parameter to enable DFS offloading in firmware
* add support for STA HE rates
* add support for TWT responder and spatial reuse
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 323ebb61e3 ("net: use listified RX for handling GRO_NORMAL
skbs") introduces batching of GRO_NORMAL packets in napi_frags_finish,
and commit 6570bc79c0 ("net: core: use listified Rx for GRO_NORMAL in
napi_gro_receive()") adds the same to napi_skb_finish. However,
dev_gro_receive (that is called just before napi_{frags,skb}_finish) can
also pass skbs to the networking stack: e.g., when the GRO session is
flushed, napi_gro_complete is called, which passes pp directly to
netif_receive_skb_internal, skipping napi->rx_list. It means that the
packet stored in pp will be handled by the stack earlier than the
packets that arrived before, but are still waiting in napi->rx_list. It
leads to TCP reorderings that can be observed in the TCPOFOQueue counter
in netstat.
This commit fixes the reordering issue by making napi_gro_complete also
use napi->rx_list, so that all packets going through GRO will keep their
order. In order to keep napi_gro_flush working properly, gro_normal_list
calls are moved after the flush to clear napi->rx_list.
iwlwifi calls napi_gro_flush directly and does the same thing that is
done by gro_normal_list, so the same change is applied there:
napi_gro_flush is moved to be before the flush of napi->rx_list.
A few other drivers also use napi_gro_flush (brocade/bna/bnad.c,
cortina/gemini.c, hisilicon/hns3/hns3_enet.c). The first two also use
napi_complete_done afterwards, which performs the gro_normal_list flush,
so they are fine. The latter calls napi_gro_receive right after
napi_gro_flush, so it can end up with non-empty napi->rx_list anyway.
Fixes: 323ebb61e3 ("net: use listified RX for handling GRO_NORMAL skbs")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Cc: Alexander Lobakin <alobakin@dlink.ru>
Cc: Edward Cree <ecree@solarflare.com>
Acked-by: Alexander Lobakin <alobakin@dlink.ru>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We needed this abstraction for some CSR registers for
IWL_DEVICE_22560, but that has been removed, so we don't need the
abstraction anymore. Remove it.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
If we have only 2k RBs like on the latest (AX210) hardware, then
even on x86 where PAGE_SIZE is 4k we currently waste half of the
memory.
If this is the case, return partial pages from the allocator and
track the offset in each RBD (to be able to find the data in them
and remap them later.)
This might also address other platforms with larger PAGE_SIZE by
putting more RBs into a single large page.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We don't need to map *everything* of the RX buffers, we won't use
that much, map only the part we're going to use. This save some
IOMMU space (if applicable and it can deal with that) and also
prepares a bit for mapping partial pages for 2K buffers later.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
For HE-capable devices, we need to allocate more receive buffers as
there could be 256 frames aggregated into a single A-MPDU, and then
they might contain A-MSDUs as well. Until 22000 family, the devices
are able to put multiple frames into a single RB and the default RB
size is 4k, but starting from AX210 family this is no longer true.
On the other hand, those newer devices only use 2k receive buffers
(by default).
Modify the code and configuration to allocate an appropriate number
of RBs depending on the device capabilities:
* 4096 for AX210 HE devices, which use 2k buffers by default,
* 2048 for 22000 family devices which use 4k buffers by default,
* 512 for existing 9000 family devices, which doesn't really
change anything since that's the default before this patch,
* 512 also for AX210/22000 family devices that don't do HE.
Theoretically, for devices lower than AX210, we wouldn't have to
allocate that many RBs if the RB size was manually increased, but
to support that the code got more complex, and it didn't really
seem necessary as that's a use case for monitor mode only, where
hopefully the wasted memory isn't really much of a concern.
Note that AX210 devices actually support bigger than 12-bit VID,
which is required here as we want to allocate 4096 buffers plus
some for quick recycling, so adjust the code for that as well.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Commit 6570bc79c0 ("net: core: use listified Rx for GRO_NORMAL in
napi_gro_receive()") has applied batched GRO_NORMAL packets processing
to all napi_gro_receive() users, including mac80211-based drivers.
However, this change has led to a regression in iwlwifi driver [1][2] as
it is required for NAPI users to call napi_complete_done() or
napi_complete() and the end of every polling iteration, whilst iwlwifi
doesn't use NAPI scheduling at all and just calls napi_gro_flush().
In that particular case, packets which have not been already flushed
from napi->rx_list stall in it until at least next Rx cycle.
Fix this by adding a manual flushing of the list to iwlwifi driver right
before napi_gro_flush() call to mimic napi_complete() logics.
I prefer to open-code gro_normal_list() rather than exporting it for 2
reasons:
* to prevent from using it and napi_gro_flush() in any new drivers,
as it is the *really* bad way to use NAPI that should be avoided;
* to keep gro_normal_list() static and don't lose any CC optimizations.
I also don't add the "Fixes:" tag as the mentioned commit was only a
trigger that only exposed an improper usage of NAPI in this particular
driver.
[1] https://lore.kernel.org/netdev/PSXP216MB04388962C411CD0B17A86F47804A0@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM
[2] https://bugzilla.kernel.org/show_bug.cgi?id=205647
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
Acked-by: Luca Coelho <luciano.coelho@intel.com>
Reported-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Tested-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Reviewed-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This is a little less efficient now as it's known to be a
multiqueue device in this function, but a future patch will
have to use a variable here anyway, so use rxq->queue_size
now instead to make it clearer.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
These aren't used outside the rx.c file, so make them static.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This is dead code, nothing uses the IWL_DEVICE_22560 macro and
thus nothing every uses IWL_DEVICE_FAMILY_22560. Remove it all.
While at it, remove some code and definitions used only in this
case, and clean up some comments/names that still refer to it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
The new device generation has a slightly different suspend resume flow
Currently, the way the driver instruct the device to move to D3 is by
sending D3_CONFIG_CMD.
Instead of using the host command the indication is by writing to the
doorbell interrupt.
The FW will respond with interrupt to indicate transition completion.
Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Add a pointer to the iwl_trans structure and point it to the trans
part of the cfg. This is the first step in disassociating the trans
configuration from the rest of the configuration.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
In order to be able to select the cfg depending on the HW revision or
on the RF ID, we need to set up the trans before selecting the cfg.
To do so, move the elements from cfg that are needed by
iwl_trans_alloc() to a separate struct at the top of the cfg, so it
can be used by other cfg types as well, before selecting the rest of
the configuration.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Sometimes the register status can include interrupts that
were masked. We can, for example, get the RF-Kill bit set
in the interrupt status register although this interrupt
was masked. Then if we get the ALIVE interrupt (for example)
that was not masked, we need to *not* service the RF-Kill
interrupt.
Fix this in the MSI-X interrupt handler.
Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Newest devices have a new firmware load mechanism. This
mechanism is called the context info. It means that the
driver doesn't need to load the sections of the firmware.
The driver rather prepares a place in DRAM, with pointers
to the relevant sections of the firmware, and the firmware
loads itself.
At the end of the process, the firmware sends the ALIVE
interrupt. This is different from the previous scheme in
which the driver expected the FH_TX interrupt after each
section being transferred over the DMA.
In order to support this new flow, we enabled all the
interrupts. This broke the assumption that we have in the
code that the RF-Kill interrupt can't interrupt the firmware
load flow.
Change the context info flow to enable only the ALIVE
interrupt, and re-enable all the other interrupts only
after the firmware is alive. Then, we won't see the RF-Kill
interrupt until then. Getting the RF-Kill interrupt while
loading the firmware made us kill the firmware while it is
loading and we ended up dumping garbage instead of the firmware
state.
Re-enable the ALIVE | RX interrupts from the ISR when we
get the ALIVE interrupt to be able to get the RX interrupt
that comes immediately afterwards for the ALIVE
notification. This is needed for non MSI-X only.
Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We added code to restock the buffer upon ALIVE interrupt
when MSI-X is disabled. This was added as part of the context
info code. This code was added only if the ISR debug level
is set which is very unlikely to be related.
Move this code to run even when the ISR debug level is not
set.
Note that gen2 devices work with MSI-X in most cases so that
this path is seldom used.
Cc: stable@vger.kernel.org
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Unite iwl_trans debug related fields under iwl_trans_debug struct to
increase readability and keep iwl_trans clean.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We have a solitary and inconspicous ` in the middle of a comment in
this function, which should not be there. Remove it.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
If for some reason the device gives us an RX interrupt before we're
ready for it, perhaps during device power-on with misconfigured IRQ
causes mapping or so, we can crash trying to access the queues.
Prevent that by checking that we actually have RXQs and that they
were properly allocated.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Differentiate between SW and HW error interrupts and support ini HW
error trigger.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The layout of the RBD (receive buffer descriptor) isn't quite right,
the hardware ended up being implemented differently. Switch to the
correct RBD layout. While at it, remove the now useless extra defines.
Also, switch the CD (completion descriptor) to the right format, which
is basically just a code cleanup because the only field we really used
(rbid) is still in the same place. We may need fragmentation later if
we ever want to use it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
AX210 devices assume that the (DRAM) addresses of the rb_stts's for
the different queues are continuous.
So allocate the rb_stts's for all the Rx queues in one place.
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
In AX210 family, UMAC periphery address space moved from
0xA00000 to 0xD00000.
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Add new device family AX210.
Make the needed changes for this family.
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Currently there is no way to debug RX/TX paths using prints
without harming tpt. Add prints to debug RX allocation path.
We can still get 1.9 gbps with those on.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Allocator swaps the pending requests with 0 when it starts
working. This means that relying on it n RX path to decide if
to move to emergency is not always a good idea, since it may
be zero, but there are still a lot of unallocated RBs in the
system. Change allocator to decrement the pending requests on
real time. It is more expensive since it accesses the atomic
variable more times, but it gives the RX path a better idea
of the system's status.
Reported-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Fixes: 868a1e863f ("iwlwifi: pcie: avoid empty free RB queue")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
First set of patches for 5.1. Lots of new features in various drivers
but nothing really special standing out.
Major changes:
brcmfmac
* DMI nvram filename quirk for PoV TAB-P1006W-232 tablet
rsi
* support for hardware scan offload
iwlwifi
* support for Target Wakeup Time (TWT) -- a feature that allows the AP
to specify when individual stations can access the medium
* support for mac80211 AMSDU handling
* some new PCI IDs
* relicense the pcie submodule to dual GPL/BSD
* reworked the TOF/CSI (channel estimation matrix) implementation
* Some product name updates in the human-readable strings
mt76
* energy detect regulatory compliance fixes
* preparation for MT7603 support
* channel switch announcement support
mwifiex
* support for sd8977 chipset
qtnfmac
* support for 4addr mode
* convert to SPDX license identifiers
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Merge tag 'wireless-drivers-next-for-davem-2019-02-06' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
Kalle Valo says:
====================
wireless-drivers-next patches for 5.1
First set of patches for 5.1. Lots of new features in various drivers
but nothing really special standing out.
Major changes:
brcmfmac
* DMI nvram filename quirk for PoV TAB-P1006W-232 tablet
rsi
* support for hardware scan offload
iwlwifi
* support for Target Wakeup Time (TWT) -- a feature that allows the AP
to specify when individual stations can access the medium
* support for mac80211 AMSDU handling
* some new PCI IDs
* relicense the pcie submodule to dual GPL/BSD
* reworked the TOF/CSI (channel estimation matrix) implementation
* Some product name updates in the human-readable strings
mt76
* energy detect regulatory compliance fixes
* preparation for MT7603 support
* channel switch announcement support
mwifiex
* support for sd8977 chipset
qtnfmac
* support for 4addr mode
* convert to SPDX license identifiers
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
These files have a long history of code changes, but analysing
the remaining code leads to having only a few changes that are
not already owned by Intel, notably from
- Andy Lutomirski <luto@amacapital.net>
- Joonwoo Park <joonwpark81@gmail.com>
- Kirtika Ruchandani <kirtika@chromium.org>
- Rajat Jain <rajatja@google.com>
- Stanislaw Gruszka <sgruszka@redhat.com>
remaining in the code today.
Note that
- I myself was working for Intel and for any possibly code
that might be before my employment there give permission
- Wizery employees were working for Intel
More specifically, we identified the following commits that
(partially may) remain today:
25c03d8e8c Joonwoo Park <joonwpark81@gmail.com> ("iwlwifi: do not schedule tasklet when rcv unused irq")
f36d04abe6 Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: use dma_alloc_coherent")
387f3381f7 Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: fix dma mappings and skbs leak")
2624e96ce1 Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: fix possible data overwrite in hcmd callback")
bfe4b80e9f Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: always check if got h/w access before write")
d536c32b45 Andy Lutomirski <luto@amacapital.net> ("iwlwifi: pcie: log when waking the NIC for hcmd submission fails")
a6d24fad00 Rajat Jain <rajatja@google.com> ("iwlwifi: pcie: dump registers when HW becomes inaccessible")
fb12777ab5 Kirtika Ruchandani <kirtika@chromium.org> ("iwlwifi: Add more call-sites for pcie reg dumper")
3a73a30049 Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: cleanup/fix memory barriers")
aa5affbacb Stanislaw Gruszka <sgruszka@redhat.com> ("iwlwifi: dump stack when fail to gain access to the device")
Align the licenses with their permission to clean up and to
make it all identical.
CC: Joonwoo Park <joonwpark81@gmail.com>
CC: Stanislaw Gruszka <sgruszka@redhat.com>
CC: Andy Lutomirski <luto@amacapital.net>
CC: Rajat Jain <rajatja@google.com>
CC: Kirtika Ruchandani <kirtika@chromium.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Kirtika Ruchandani <kirtika@chromium.org>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Joonwoo Park <joonwpark81@gmail.com>
Acked-by: Rajat Jain <rajatja@google.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
In case there are bugs in this area, this data can
help with debugging.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This function was only used by 9000 A-step devices, which we don't
support anymore, so it can be removed.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.
This change was generated with the following Coccinelle SmPL patch:
@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@
-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>
If all free RB queues are empty, the driver will never restock the
free RB queue. That's because the restocking happens in the Rx flow,
and if the free queue is empty there will be no Rx.
Although there's a background worker (a.k.a. allocator) allocating
memory for RBs so that the Rx handler can restock them, the worker may
run only after the free queue has become empty (and then it is too
late for restocking as explained above).
There is a solution for that called 'emergency': If the number of used
RB's reaches half the amount of all RB's, the Rx handler will not wait
for the allocator but immediately allocate memory for the used RB's
and restock the free queue.
But, since the used RB's is per queue, it may happen that the used
RB's are spread between the queues such that the emergency check will
fail for each of the queues
(and still run out of RBs, causing the above symptom).
To fix it, move to emergency mode if the sum of *all* used RBs (for
all Rx queues) reaches half the amount of all RB's
Signed-off-by: Shaul Triebitz <shaul.triebitz@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>
We offloaded all the RX configuration of init to firmware. However,
the configuration of interrupt coalescing was left hanging - it wasn't
offloaded nor was it written by host.
This write to the CSR is allowed in gen2, so the host can do it.
Without it we have various issues with RX fullness.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Store the default rxq number in a variable, so we won't need
to use the actual number in the code.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Allow other device generations to use the utilities that
are used to send and reclaim host commands and to allocate
rx, by making it non-static.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We need to drop packets with errors (such as replay,
MIC, ICV, conversion, duplicate and so on).
Drop invalid packets, put the status bits in the metadata and
move the enum definition to the correct place (FW API header).
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
We would like to allow other utlities to init msix and rx.
Put their declarations in a place accessible to other utilities.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This makes code less indented and more readable.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This allows less "dummy" declarations and casting.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The rfh for 22560 devices has changed so it supports now
the same arch of using used and free lists, but different
structures to support the last.
Use the new structures, hw dependent, to manage the lists.
bd, the free list, uses the iwl_rx_transfer_desc,
in which the vid is stored in the structs' rbid
field, and the page address in the addr field.
used_bd, the used list, uses the iwl_rx_completion_desc
struct, in which the vid is stored in the structs' rbid
field.
rb_stts, the hw "write" pointer of rx is stored in a
__le16 array, in which each entry represents the write
pointer per queue.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The smallest rb size supported today is 4k rx buffers.
22560 devices use 2k rxb's, so allow using 2k buffers.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
In 22560 devices the firmware will do all the hw configurations,
but that's not ready yet.
Update the correct registers in the driver until the FW is ready
and does it by itself.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
In 22560 devices the ROM sendis an interrupt to the host
once the IML reading is done.
Handle this interrupt, and indicate sw error in case the
value is fail.
Additionally, the cause for sw error in 22560 devices
have been changed, so update the cause list.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
The hw now refers to two new blocks:
* rx tr tail - The Tail index on the free buffers queue TR,
which is update by the device after reading the free buffer
from the tr.
* rx cr tail - Updated by the driver when completing
processing a new completion descriptor in the cr.
Add these two new struct to the rxq, allocate and free them
when needed.
In addition, the register for rx write pointer had been changed
to HBUS_TARG_WRPTR. The way to differentiate tx from rx is the
queue number. TX range is 0-511, and RX's is 512-527.
Signed-off-by: Golan Ben Ami <golan.ben.ami@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
