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qcom_smd_register_edge() is provided by either QCOM_SMD or RPMSG_QCOM_SMD,
and if both of them are disabled, it does nothing.
The check for the PIL drivers however only checks for QCOM_SMD, so it breaks
with QCOM_SMD=n && RPMSG_QCOM_SMD=m:
drivers/remoteproc/built-in.o: In function `smd_subdev_remove':
qcom_wcnss_iris.c:(.text+0x231c): undefined reference to `qcom_smd_unregister_edge'
drivers/remoteproc/built-in.o: In function `smd_subdev_probe':
qcom_wcnss_iris.c:(.text+0x2344): undefined reference to `qcom_smd_register_edge'
drivers/remoteproc/built-in.o: In function `smd_subdev_probe':
qcom_q6v5_pil.c:(.text+0x3538): undefined reference to `qcom_smd_register_edge'
qcom_q6v5_pil.c:(.text+0x3538): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_smd_register_edge'
This clarifies the Kconfig dependency.
Fixes: 4b48921a8f74 ("remoteproc: qcom: Use common SMD edge handler")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Pull vhost updates from Michael Tsirkin:
"virtio, vhost: optimizations, fixes
Looks like a quiet cycle for vhost/virtio, just a couple of minor
tweaks. Most notable is automatic interrupt affinity for blk and scsi.
Hopefully other devices are not far behind"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio-console: avoid DMA from stack
vhost: introduce O(1) vq metadata cache
virtio_scsi: use virtio IRQ affinity
virtio_blk: use virtio IRQ affinity
blk-mq: provide a default queue mapping for virtio device
virtio: provide a method to get the IRQ affinity mask for a virtqueue
virtio: allow drivers to request IRQ affinity when creating VQs
virtio_pci: simplify MSI-X setup
virtio_pci: don't duplicate the msix_enable flag in struct pci_dev
virtio_pci: use shared interrupts for virtqueues
virtio_pci: remove struct virtio_pci_vq_info
vhost: try avoiding avail index access when getting descriptor
virtio_mmio: expose header to userspace
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Add a struct irq_affinity pointer to the find_vqs methods, which if set
is used to tell the PCI layer to create the MSI-X vectors for our I/O
virtqueues with the proper affinity from the start. Compared to after
the fact affinity hints this gives us an instantly working setup and
allows to allocate the irq descritors node-local and avoid interconnect
traffic. Last but not least this will allow blk-mq queues are created
based on the interrupt affinity for storage drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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In the transition from using rproc_da_to_va(), the type of the load
offset became unsigned. This causes the subsequent check to let negative
values less than p_memsz + mem_size through and we write outside of the
buffer.
Change the type back to a signed value to catch this.
Fixes: 7f0dd07a9b29 ("remoteproc: qcom: mdt_loader: Refactor MDT loader")
Fixes: e7fd25226295 ("remoteproc: qcom: q6v5: Decouple driver from MDT loader")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Acked-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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This patch provides virtio communication support based on mailbox
for ST co-processors.
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Associated clock is prepared in st_rproc_parse_dt function.
it should be unprepared in case of error during probing.
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The functions rproc_add_virtio_devices() and rproc_fw_config_virtio()
are reduced to trigger auto-boot only. Modify these function names and
related comments to reflect their current state.
This patch does not add any functional change.
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The rproc_add_virtio_devices() requests firmware asynchronously and
triggers boot if the auto_boot flag is set. However, this
asynchronous call seems to be redundant for non auto-boot scenario
since the rproc_boot() would call request_firmware() anyways. Move
the auto_boot check to rproc_add() so that a redundant call to
_request_firmware can be avoided for non auto-boot case.
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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SCM call to check whether Peripheral Authentication Service (PAS) is
supported returns false for ADSP on MSM8996. Drop this call from the
driver so that the probe() function succeeds for ADSP PIL device.
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Call the common SMD edge handler to instantiate subdevices to bring
associated SMD edges up and down as the remoteproc is started and
stopped.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Move the SMD edge handling to the Qualcomm common file to make it
reusable for other Qualcomm remoteproc drivers.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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With the remoteproc parts cleaned out of the MDT loader we can move it
to drivers/soc/qcom.
Acked-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Pushing the SCM calls into the MDT loader reduces duplication in the
callers and allows for non-remoteproc clients to use the helper for
parsing and loading MDT files.
Cc: Andy Gross <andy.gross@linaro.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The "fw" firmware object is passed from the remoteproc core and should
not be overwritten, as that results in leaked buffers and a double free
of the the last firmware object.
Fixes: 051fb70fd4ea ("remoteproc: qcom: Driver for the self-authenticating Hexagon v5")
Cc: stable@vger.kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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In preparation for moving the mdt loader out of remoteproc let's move
the somewhat unrelated resource table dummy helper to a Qualcomm
"common" file.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Rather than duplicating half of the MDT loader in the validation step
move the entire MDT parser into the q6v5 driver. This allows us to make
the shared MDT-loader call the SCM PAS operations directly which
simplifies the client code and allows for better reuse of the code.
Cc: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The Q6V5 in MSM8916 doesn't have a mss supply, so remove this and update
the code to support cases without proxy or active supplies.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The recently added initialization is rather unusual because it uses a constructor for
a variable-length array to assign a constant structure to a member that uses a fixed-length
array. This confuses clang and breaks the build.
drivers/remoteproc/qcom_q6v5_pil.c:1024:18: error: incompatible pointer types initializing 'const char *' with an expression of type
:%s 'struct qcom_mss_reg_res [4]' [-Werror,-Wincompatible-pointer-types]
.proxy_supply = (struct qcom_mss_reg_res[]) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/remoteproc/qcom_q6v5_pil.c:1024:18: warning: suggest braces around initialization of subobject [-Wmissing-braces]
.proxy_supply = (struct qcom_mss_reg_res[]) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We can either turn this constructor into a regular initializer by removing
the 'struct qcom_mss_reg_res[])', or we can make the array variable length.
The latter approach is used for the arrays of strings in the same structure,
so let's use that here too.
Fixes: 19f902b53b47 ("remoteproc: qcom: Initialize and enable proxy and active regulators.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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firmware_loading_complete is used to synchronize operations
on rproc while asynchronous firmware loading is in progress.
However, rproc_boot() no longer waits on
firmware_loading_complete. Hence drop this completion
variable altogether and handle the race between rproc_del()
and rproc_boot() using new state RPROC_DELETED.
The request_firmware_nowait() will hold the reference to
rproc device by using a get_device()/put_device(), so the
rproc struct will remain valid even when we return from
rproc_del() before the asynchronous call to
rproc_fw_config_virtio() completes.
CC: Loic Pallardy <loic.pallardy@st.com>
CC: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Add new state RPROC_DELETED to handle synchronization
between rproc_del() and other operations on rproc. This
state represents the rproc device that has been "deleted".
CC: Loic Pallardy <loic.pallardy@st.com>
CC: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The "remoteproc{0,1...}" sysfs entries are added in
rproc_add() and deleted in rproc_type_release() instead of
in rproc_del(). That leaves these lingering entries sticking
around after we return from rproc_del(). Move the
rproc_delete_debug_dir() to rproc_del() to fix this.
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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This patch add slpi remoteproc support in existing adsp rproc driver.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
[bjorn: documented aggre2 and px-supply]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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This patch add additional clock and regulator resource which are
initialized based on compatible and has no impact on existing driver
working. This resourse addition enable the existing driver to handle.
low pass sensor processor device also.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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This patch initialize certain driver related data based on compatible
string. This enable driver to handle more than one similar device in
by differentiating in probe their private data.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Declare rproc_ops structures as const as they are only passed as an
argument to the function rproc_alloc. This argument is of type const, so
rproc_ops structures having this property can be declared const too.
Done using Coccinelle:
@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct rproc_ops i@p = {...};
@ok1@
identifier r1.i;
position p;
@@
rproc_alloc(...,&i@p,...)
@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p
@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct rproc_ops i;
File size details:
Size of the file remoteproc/da8xx_remoteproc.o remains the same before and
after applying the changes.
text data bss dec hex filename
1312 100 4 1416 588 remoteproc/da8xx_remoteproc.o
1312 100 4 1416 588 remoteproc/da8xx_remoteproc.o
970 240 0 1210 4ba remoteproc/omap_remoteproc.o
1002 192 0 1194 4aa remoteproc/omap_remoteproc.o
1901 240 0 2141 85d remoteproc/st_remoteproc.o
1933 192 0 2125 84d remoteproc/st_remoteproc.o
1288 96 0 1384 568 remoteproc/st_slim_rproc.o
1320 64 0 1384 568 remoteproc/st_slim_rproc.o
2121 240 0 2361 939 remoteproc/wkup_m3_rproc.o
2161 192 0 2353 931 remoteproc/wkup_m3_rproc.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Certain regulators need voting by rproc on behalf of hexagon only during
restart operation but certain regulator need to be voted till hexagon
is up, these regulators are identified as proxy and active regulators
respectively. This patch provide interface to initialize, enable and
disable proxy and active regulators separately.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
[bjorn: dropped disable of proxy regulators from stop]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Certain clocks need voting by rproc on behalf of hexagon only during
restart operation but certain clocks need to be voted till hexagon is
up, these clocks are identified as proxy and active clocks respectively.
This patch provide interface to initialize, enable and disable proxy and
active clocks separately.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
[bjorn: dropped disable of proxy clocks on stop]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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MSS rproc loader need chip specific resources initialization during probe
to load and boot modem firmware, this need compatible string based
differentiation in resources to be initialized. This patch add and provide
a template struct whose fields represent all those resources which are
needed to load and boot modem fw and which may differ from chip to chip.
This patch also add new compatible string for msm8916, msm8974 platform.
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Top level config option without any kind of help... is kind of
strange. Remote processors could also mean some kind of distributed
computing...
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Following any fw_rsc_vdev entries in the resource table are two variable
length arrays, the first one reference vring resources and the second
one is the virtio config space. The virtio config space is used by
virtio to communicate status and configuration changes and must as such
be shared with the remote.
The reverted commit incorrectly made any changes to the virtio config
space only affect the local copy, in an attempt to allowing memory
protection of the shared resource table.
This reverts commit cda8529346935fc86f476999ac4fbfe4e17abf11.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Commit 2b45cef5868a ("remoteproc: Further extend the vdev life cycle")
extends kref support for vdev management.
It introduces a regression when following sequence is executed:
rproc_boot --> rproc_shutdown --> rproc_boot
Second rproc_boot call crashes on register_virtio_device as device
is already existing.
Issue is previous vdev is never released when rproc is stop because
associated refcount is too high.
kref_get introduces is not needed as kref_init already initializes
krefcount to 1 because it considers associated variable as used.
This introduces a misalignment between kref_get and kref_put calls.
Fixes: 2b45cef5868a ("remoteproc: Further extend the vdev life cycle")
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The adsp-pil driver relies on SCM and causes a build error without it:
ERROR: "qcom_scm_pas_supported" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_is_available" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_auth_and_reset" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_shutdown" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_mem_setup" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_init_image" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
This adds a 'select', as SCM is a silent Kconfig symbol that gets
enabled implicitly by all its users.
Fixes: b9e718e950c3 ("remoteproc: Introduce Qualcomm ADSP PIL")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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In the event that rproc_boot() is called before the firmware loaded
completion has been flagged it will wait with the mutex held,
obstructing the request_firmware_nowait() callback from completing the
wait.
As rproc_fw_config_virtio() has been reduced to only triggering
auto-boot there is no longer a reason for waiting in rproc_boot(), so
drop this.
Cc: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Back in July 2014 I asked around what was the intended target
platform for the STE Modem remoteproc driver, so that I could add the
proper hardware dependency to its config option. The answer I got was
that there was no known publicly available hardware needing it and it
was unlikely that there ever would.
So I think it's time to delete this driver to lower the maintenance
burden.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Suman Anna <s-anna@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Warning users that remoteproc and it's binary format are under
development doesn't serve much of a purpose. Different drivers support
different image formats and the resource table has a version field that
would need to be bumped when incompatible changes are introduced.
So lets drop this warning to clean up the kernel log.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The adsp-pil driver relies on SCM and causes a build error without it:
ERROR: "qcom_scm_pas_supported" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_is_available" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_auth_and_reset" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_shutdown" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_mem_setup" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
ERROR: "qcom_scm_pas_init_image" [drivers/remoteproc/qcom_adsp_pil.ko] undefined!
This adds a 'select', as SCM is a silent Kconfig symbol that gets
enabled implicitly by all its users.
Fixes: b9e718e950c3 ("remoteproc: Introduce Qualcomm ADSP PIL")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Add linux/sizes.h to prevent build failure on non ARM architectures
as:
CC [M] drivers/remoteproc/qcom_mdt_loader.o
In file included from include/linux/cache.h:4:0,
from include/linux/printk.h:8,
from include/linux/kernel.h:13,
from include/asm-generic/bug.h:13,
from arch/x86/include/asm/bug.h:35,
from include/linux/bug.h:4,
from include/linux/thread_info.h:11,
from arch/x86/include/asm/elf.h:7,
from include/linux/elf.h:4,
from drivers/remoteproc/qcom_mdt_loader.c:18:
drivers/remoteproc/qcom_mdt_loader.c: In function ‘qcom_mdt_parse’:
drivers/remoteproc/qcom_mdt_loader.c:90:52: error: ‘SZ_4K’ undeclared
(first use in this function)
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The transition from rproc_put to rproc_free raced with the review of the
Qualcomm ADSP and ST SLIMproc drivers and these where not updated
accordingly.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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When qcom_smd is a loadable module and wcnss-pil is built-in,
we get a link error:
drivers/remoteproc/qcom_wcnss_pil.o: In function `wcnss_smd_remove':
qcom_wcnss_iris.c:(.text.wcnss_smd_remove+0x10): undefined reference to `qcom_smd_unregister_edge'
drivers/remoteproc/qcom_wcnss_pil.o: In function `wcnss_smd_probe':
qcom_wcnss_iris.c:(.text.wcnss_smd_probe+0x12): undefined reference to `qcom_smd_register_edge'
This adds a Kconfig dependency to avoid this. We can still allow
build-testing with SMD disabled.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Add xo clock support required to boot up Qualcomm ADSP processor.
The ADSP remoteproc driver keeps xo clock enabled until the
driver receives "handover" irq, in order to allow ADSP processor
to vote for xo clock with rpm.
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The newly added driver tries to 'select' a symbol that it has an
implicit dependency on, which confuses Kconfig:
subsection "Kconfig recursive dependency limitations"
drivers/remoteproc/Kconfig:3: symbol REMOTEPROC is selected by QCOM_ADSP_PIL
As REMOTEPROC is itself user-visible, we clearly should not select
it from a driver, removing the line fixes the problem.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/slave-dma into rproc-next
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The Qualcomm ADSP Peripheral Image Loader is used on a variety of
different Qualcomm platforms for loading firmware into and controlling
the Hexagon based ADSP.
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The tie between the main WCNSS driver and the IRIS driver causes a
circular dependency between the two modules. Neither part makes sense to
have on their own so lets merge them into one module.
For the sake of picking up the clock and regulator resources described
in the iris of_node we need an associated struct device. But, to keep
the size of the patch down we continue to represent the IRIS part as its
own platform_driver, within the same module, rather than setting up a
dummy device.
Fixes: aed361adca9f ("remoteproc: qcom: Introduce WCNSS peripheral image loader")
Reported-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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As all vdev resources are allocated before we boot the remote processor
we no longer need to support modifying the resource table while the
remote is running.
This saves us from the table_ptr dance, but more importantly allow the
remote processor to enable security lock down of the loaded table memory
region.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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The vdev handler is now just another resource allocator, so handle all
resource types in a single pass.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Vrings are now allocated as we parse the resource table, before we
boot the rproc or register any virtio devices, so it's safe to bump
max_notifyid as part of this process.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Represent the virtio device part of the vdev resources as remoteproc
subdevices to finalize the decoupling of the virtio resource and device
handling.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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Tie the vdev (and hence vring) life cycle to the resource parsing and
resource cleanup operations, allowing us to safely register and
unregister virtio devices on the go.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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