Limit non-privileged UID commands to half of the available command slots
when privileged UIDs are present.
Privileged throttle commands will not be limited.
Use an xarray to store privileged UIDs. Add insert and remove functions
for privileged UIDs management.
Non-user commands (with uid 0) are not limited.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/d2f3dd9a0dbad3c9f2b4bb0723837995e4e06de2.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Previously, throttle commands were identified and limited based on
opcode. These commands were limited to half the command slots using a
semaphore, and callback commands checked the opcode to determine
semaphore release.
To allow exceptions, we introduce a variable to indicate when the
throttle lock is held. This allows scenarios where throttle commands
are not limited. Callback functions use this variable to determine
if the throttle semaphore needs to be released.
This patch contains no functional changes. It's a preparation for the
next patch.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Link: https://patch.msgid.link/055d975edeb816ac4c0fd1e665c6157d11947d26.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Merge tag 'loongarch-fixes-6.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch fixes from Huacai Chen:
"Fix bugs in kernel build, hibernation, memory management and KVM"
* tag 'loongarch-fixes-6.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
LoongArch: KVM: Fix GPA size issue about VM
LoongArch: KVM: Reload guest CSR registers after sleep
LoongArch: KVM: Add interrupt checking for AVEC
LoongArch: Set hugetlb mmap base address aligned with pmd size
LoongArch: Set max_pfn with the PFN of the last page
LoongArch: Use polling play_dead() when resuming from hibernation
LoongArch: Eliminate superfluous get_numa_distances_cnt()
LoongArch: Convert unreachable() to BUG()
The current max-frequency 200000000 of emmc is not stable. When doing
heavy write there will be I/O Error. After setting max-frequency to
150000000 the emmc is stable under write.
Also remove property mmc-hs200-1_8v because we are already running at
HS400 mode.
Tested with fio command:
fio -filename=./test_randread -direct=1 -iodepth 1 -thread \
-rw=randwrite -ioengine=psync -bs=16k -size=1G -numjobs=10 \
-runtime=600 -group_reporting -name=mytest
Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
Link: https://lore.kernel.org/r/20250228143341.70244-1-liujianfeng1994@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The SPI NOR chip is connected on the FSPI0 core, so enable the sfc0 node
and add the flash device to it.
The SPI NOR won't work at higher speed than 50 MHz, specify the limit.
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Link: https://lore.kernel.org/r/20250228145304.581349-3-detlev.casanova@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The use of -ffreestanding is a leftover that is only needed for certain
versions of Clang. Adjust this to be Clang-only. A later patch will make
this a versioned check.
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250308042929.1753543-1-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Radxa E20C has two buttons, one SARADC maskrom button and one GPIO user
button.
Add support for the maskrom button using a adc-keys node, also add the
regulators used by SARADC controller.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20250304201642.831218-5-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Radxa E20C has two buttons, one SARADC maskrom button and one GPIO user
button.
Add support for the user button using a gpio-keys node.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20250304201642.831218-3-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Radxa E20C has three gpio controlled leds (sys, wan and lan).
Add led nodes and set default trigger to heartbeat for the sys led and
netdev for the lan and wan leds.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Link: https://lore.kernel.org/r/20250304201642.831218-2-jonas@kwiboo.se
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Move the more esoteric helpers for netdev instance lock to
a dedicated header. This avoids growing netdevice.h to infinity
and makes rebuilding the kernel much faster (after touching
the header with the helpers).
The main netdev_lock() / netdev_unlock() functions are used
in static inlines in netdevice.h and will probably be used
most commonly, so keep them in netdevice.h.
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250307183006.2312761-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Same as RK3568, RK3528 uses SCMI clk instead of ARMCLK.
Add SCMI clk for CPU, GPU and RNG will also use it.
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20250307100008.789129-2-amadeus@jmu.edu.cn
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The Rock 5B has a Micro HDMI port, which can be used for receiving
HDMI data. This enables support for it.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shreeya Patel <shreeya.patel@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://lore.kernel.org/r/20250307091857.646581-3-dmitry.osipenko@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
SKB_DROP_REASON_UDP_CSUM can be used in four locations
when dropping a packet because of a wrong UDP checksum.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250307102002.2095238-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The Quality-of-Service (QsS) node stores/restores specific
register contents when the power domains is turned off/on.
Add QoS node so that they can connect to the power domain.
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20250306123809.273655-3-amadeus@jmu.edu.cn
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This device can be used in conjunction with audio-graph-card to provide
an endpoint for binding with the other side of the audio link.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://patch.msgid.link/20250306053138.1914956-1-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add optional vref-supply property to describe the regulator supplying
the digital microphones.
Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://patch.msgid.link/20250306171840.593443-2-olivier.moysan@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Implement the three callbacks that is needed to enable support for
reporting the mic privacy change via soundwire.
In PTL the mic privacy reporting is supported via soundwire and DMIC and
the soundwire is owned by the host, it's interrupt is routed there.
To enable the interrupt, the sublink mask needs to be passed to the
multilink layer, the check_mic_privacy_irq/process_mic_privacy callbacks
needs to be implemented to check and report the mic privacy change.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-9-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Add generic callback definitions for checking the mic privacy interrupt and
status.
Implement wrappers for mic privacy reported via the Soundwire interrupt and
its vendor specific SHIM registers.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-8-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
New register has been introduced with PTL in the vendor specific SHIM
registers, outside of the IPs itself for microphone privacy status handling.
Via the PVCCS register the current microphone privacy status can be checked
and the interrupt generation on status change can be enabled/disabled.
The status change interrupt is routed to the owner of the interface
(DSP/host).
The PVCCS is provided for each sublink under the IP to make it possible to
control the interrupt generation per sublink.
On status change the MDSTSCHG bit needs to be cleared for all sublink of
the interface to be able to detect future changes in privacy.
The status bit (MDSTS) is volatile in all PVCCS register, it reflects the
current state of the GPIO signal.
Microphone privacy is a hardware feature (if enabled and configured that
way), the host has only passive, monitoring role.
The added functions are generic to be future proof if the mic privacy
support is extended beyond Soundwire and DMIC links.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-7-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
ACE3 (Panther Lake) introduced support for microphone privacy feature which
can - in hardware - mute incoming audio data based on a state of a physical
switch.
The change in the privacy state is delivered through interface IP blocks
and can only be handled by the link owner.
In Intel platforms Soundwire is for example host owned, so the interrupt
can only be handled by the host.
Since the input stream is going to be muted by hardware, the host needs to
send a message to firmware about the change in privacy so it can execute a
fade out/in to enhance user experience.
The support for microphone privacy can be queried from the HW_CONFIG data
under the INTEL_MIC_PRIVACY_CAP tuple. This is Intel specific data, the
core will pass it to platform code if the intel_configure_mic_privacy()
callback is provided.
Platform code can call sof_ipc4_mic_privacy_state_change() to send the IPC
message to the firmware on state change.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Create a minimal placeholder to make it possible to add code to handle
the new features of Panther Lake compared to MTL/LNL.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-5-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
There is no need to export individual dsp_ops functions anymore as the
callbacks are filled now by sof_mtl_set_ops()
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
LunarLake is a next generation in ACE architecture and most of the dsp_ops
are the same as it is in previous generation.
Use the sof_mtl_set_ops() to get the ops used for mtl and update the ones
that needs different functions for LNL.
Update pci-ptl at the same time to use the LNL dsp_ops as before.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Move the sof_mtl_ops and sof_mtl_ops_init() to pci-mtl.c as local static
and add a 'generic' sof_mtl_set_ops() function as replacement exported
function to fill the dsp_ops structure.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Introduce a new mount option "nat_bits" to control nat_bits feature,
by default nat_bits feature is disabled.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
After using the device for a while, Tom reports that he initially described
the switch port labels incorrectly. Apparently, ASUS's own firmware also
describes them incorrectly. Correct them to what is seen on the chassis.
Reported-by: Tom Brautaset <tbrautaset@gmail.com>
Fixes: b116239094 ("ARM: dts: BCM5301X: Add DT for ASUS RT-AC3200")
Signed-off-by: Chester A. Unal <chester.a.unal@arinc9.com>
Link: https://lore.kernel.org/r/20250304-for-broadcom-fix-rt-ac3200-switch-ports-v1-1-7e249a19a13e@arinc9.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
After using the device for a while, Tom reports that he initially described
the switch port labels incorrectly. Correct them.
Reported-by: Tom Brautaset <tbrautaset@gmail.com>
Fixes: 961dedc6b4 ("ARM: dts: BCM5301X: Add DT for ASUS RT-AC5300")
Signed-off-by: Chester A. Unal <chester.a.unal@arinc9.com>
Link: https://lore.kernel.org/r/20250303-for-broadcom-fix-rt-ac5300-switch-ports-v1-1-e058856ef4d3@arinc9.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
During upstream process of Raspberry Pi 4 back in 2019 the ARMv7 stubs
didn't configured the ARM architectural timer. This firmware issue has
been fixed in 2020, which gave users enough time to update their system.
So drop this property to allow the use of the vDSO version of
clock_gettime.
Link: https://github.com/raspberrypi/tools/pull/113
Fixes: 7dbe8c62ce ("ARM: dts: Add minimal Raspberry Pi 4 support")
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250222094113.48198-1-wahrenst@gmx.net
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Device nodes in the examples are supposed to be enabled, so the schema
will be validated against them. Keeping them disabled hides potential
errors.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250307081327.35153-2-krzysztof.kozlowski@linaro.org
The example DTS uses 'num-ib-windows' and 'num-ob-windows' properties
but these are not defined in the binding. Binding also does not
reference snps,dw-pcie-common.yaml, probably because it is quite
different even though the device is based on Synopsys controller.
The properties are actually deprecated, so simply drop them from the
example.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250307081327.35153-1-krzysztof.kozlowski@linaro.org
Remove the superfluous function dw_pcie_ep_find_ext_capability(),
as it is virtually identical to dw_pcie_find_ext_capability().
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250221202646.395252-3-cassel@kernel.org
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Fix a kernel oops found while testing the stm32_pcie Endpoint driver
with handling of PERST# deassertion:
During EP initialization, pci_epf_test_alloc_space() allocates all BARs,
which are further freed if epc_set_bar() fails (for instance, due to no
free inbound window).
However, when pci_epc_set_bar() fails, the error path:
pci_epc_set_bar() ->
pci_epf_free_space()
does not clear the previous assignment to epf_test->reg[bar].
Then, if the host reboots, the PERST# deassertion restarts the BAR
allocation sequence with the same allocation failure (no free inbound
window), creating a double free situation since epf_test->reg[bar] was
deallocated and is still non-NULL.
Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space()
invocations are symmetric, and as such, set epf_test->reg[bar] to NULL
when memory is freed.
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Christian Bruel <christian.bruel@foss.st.com>
Link: https://lore.kernel.org/r/20250124123043.96112-1-christian.bruel@foss.st.com
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
The static function devm_pci_epc_match() is only invoked within the
devm_pci_epc_destroy(). However, since it was initially introduced,
this new API has had no callers.
Thus, remove both the unused API and the static function.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20250217-remove_api-v2-1-b169c9117045@quicinc.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Looking at section "11.4.4.29 USP_PCIE_RESBAR Registers Summary" in the
Technical Reference Manual (TRM) for RK3588, we can see that none of the
BARs are Fixed BARs, but actually Resizable BARs.
I couldn't find any reference in the TRM for RK3568, but looking at the
downstream PCIe endpoint driver, both RK3568 and RK3588 are treated as
the same, so the BARs on RK3568 must also be Resizable BARs.
Now when we actually have support for Resizable BARs, let's configure
these BARs as such.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250131182949.465530-16-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
The support for a specific iATU alignment was added in
commit 2a9a801620 ("PCI: endpoint: Add support to specify alignment for
buffers allocated to BARs").
This commit specifically mentions both that the alignment by each DWC
based EP driver should match CX_ATU_MIN_REGION_SIZE, and that AM65x
specifically has a 64 KB alignment.
This also matches the CX_ATU_MIN_REGION_SIZE value specified in the
section "12.2.2.4.7 PCIe Subsystem Address Translation" of the Technical
Reference Manual (TRM) for AM65x:
https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf
This higher value, 1 MB, was obviously an ugly hack used to be able to
handle Resizable BARs which have a minimum size of 1 MB.
Now when we actually have support for Resizable BARs, let's configure the
iATU alignment requirement to the actual requirement.
(BARs described as Resizable will still get aligned to 1 MB.)
Cc: stable+noautosel@kernel.org # Depends on PCI endpoint Resizable BARs series
Fixes: 23284ad677 ("PCI: keystone: Add support for PCIe EP in AM654x Platforms")
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250131182949.465530-15-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Looking at section "12.2.2.4.15 PCIe Subsystem BAR Configuration" in the
following Technical Reference Manual (TRM) for AM65x:
https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf
We can see that BAR2 and BAR5 are not Fixed BARs, but actually Resizable
BARs.
Now when we actually have support for Resizable BARs, let's configure
these BARs as such.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250131182949.465530-14-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
The DWC databook specifies three different BARn_SIZING_SCHEME_N as:
- Fixed Mask (0)
- Programmable Mask (1)
- Resizable BAR (2)
Each of these sizing schemes have different instructions for how to
initialize the BAR.
The DWC driver currently does not support resizable BARs.
Instead, in order to somewhat support resizable BARs, the DWC EP driver
currently has an ugly hack that force sets a resizable BAR to 1 MB, if
such a BAR is detected.
Additionally, this hack only works if the DWC glue driver also has lied
in their EPC features, and claimed that the resizable BAR is a 1 MB fixed
size BAR.
This is unintuitive (as you somehow need to know that you need to lie in
your EPC features), but other than that it is overly restrictive, since a
resizable BAR is capable of supporting sizes different than 1 MB.
Add proper support for resizable BARs in the DWC EP driver.
Note that the pci_epc_set_bar() API takes a struct pci_epf_bar which tells
the EPC driver how it wants to configure the BAR.
struct pci_epf_bar only has a single size struct member.
This means that an EPC driver will only be able to set a single supported
size. This is perfectly fine, as we do not need the complexity of allowing
a host to change the size of the BAR. If someone ever wants to support
resizing a resizable BAR, the pci_epc_set_bar() API can be extended in the
future.
With these changes, we allow an EPF driver to configure the size of
Resizable BARs, rather than forcing them to a 1 MB size.
This means that an EPC driver does not need to lie in EPC features, and an
EPF driver will be able to set an arbitrary size (not be forced to a 1 MB
size), just like BAR_PROGRAMMABLE.
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250131182949.465530-13-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Move dw_pcie_ep_find_ext_capability() so that it is located next to
dw_pcie_ep_find_capability().
Additionally, a follow-up commit requires this to be defined earlier
in order to avoid a forward declaration.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250131182949.465530-12-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Add a helper function to convert a size to the representation used by the
Resizable BAR Capability Register.
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250131182949.465530-11-cassel@kernel.org
[mani: squashed the change that added PCIe spec reference to comments
from https://lore.kernel.org/linux-pci/20250219171454.2903059-2-cassel@kernel.org]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
