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Most GSI general errors are unrecoverable without a full reset.
Despite that, we want to receive these errors so we can at least
report what happened before whatever undefined behavior ensues.
Explicitly disable all such interrupts in gsi_irq_setup(), then
enable those we want in gsi_irq_enable(). List the interrupt types
we are interested in (everything but breakpoint) explicitly rather
than using GSI_CNTXT_GSI_IRQ_ALL, and remove that symbol's
definition.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It is possible for other execution environments (EEs, like the modem)
to request changes to local (AP) channel or event ring state. We do
not support this feature.
In gsi_irq_setup(), explicitly zero the mask that defines which
channels are permitted to generate inter-EE channel state change
interrupts. Do the same for the event ring mask.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A GSI channel must be started in order to use it to perform a
transfer data (or command) transaction. And the only time we'll see
an IEOB interrupt is if we send a transaction to a started channel.
Therefore we do not need to have the IEOB interrupt type enabled
until at least one channel has been started. And once the last
started channel has been stopped, we can disable the IEOB interrupt
type again.
We already enable the IEOB interrupt for a particular channel only
when it is started. Extend that by having the IEOB interrupt *type*
be enabled only when at least one channel is in STARTED state.
Disallow all channels from triggering the IEOB interrupt in
gsi_irq_setup(). We only enable an channel's interrupt when
needed, so there is no longer any need to zero the channel mask
in gsi_irq_disable().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The completion of a generic EE GSI command is signaled by a global
interrupt of type GP_INT1. The only other used type for a global
interrupt is a hardware error report.
First, disallow all global interrupt types in gsi_irq_setup(). We
want to know about hardware errors, so re-enable the interrupt type
in gsi_irq_enable(), to allow hardware errors to be reported.
Disable that interrupt type again in gsi_irq_disable().
We only issue generic EE commands one at a time, and there's no
reason to keep the completion interrupt enabled when no generic
EE command is pending. We furthermore have no need to enable the
GP_INT2 or GP_INT3 interrupt types (which aren't used).
The change in gsi_irq_enable() makes GSI_CNTXT_GLOB_IRQ_ALL unused,
so get rid of it. Have gsi_generic_command() enable the GP_INT1
interrupt type (in addition to the ERROR_INT type) only while a
generic command is pending.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A GSI event ring causes an event control interrupt to fire whenever
its state changes (between NOT_ALLOCATED and ALLOCATED). No event
ring should ever change state except when we request it to.
Currently, we permit *all* events rings to generate event control
interrupts--even those that are never used. And we enable event
control interrupts essentially at all times, from setup to teardown.
Instead, only enable the event control interrupt type for the
duration of an event ring command, and when doing so, only allow
the event ring being operated upon to cause the interrupt to fire.
Disallow all event rings from issuing the event control interrupt
in gsi_irq_setup().
Because an event ring's interrupt is only enabled when needed,
there is no longer any need to zero the event channel mask in
gsi_irq_disable().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A GSI channel causes a channel control interrupt to fire whenever
its state changes (between NOT_ALLOCATED, ALLOCATED, STARTED, etc.).
We do not support inter-EE channel commands (initiated by other EEs),
so no channel should ever change state except when we request it to.
Currently, we permit *all* channels to generate channel control
interrupts--even those that are never used. And we enable channel
control interrupts essentially at all times, from setup to teardown.
Instead, disable all channel control interrupts initially in
gsi_irq_setup(), and only enable the channel control interrupt
type for the duration of a channel command. When doing so, only
allow the channel being operated upon to cause the interrupt to
fire.
Because a channel's interrupt is now enabled only when needed (one
channel at a time), there is no longer any need to zero the channel
mask in gsi_irq_disable().
Add new gsi_irq_type_enable() and gsi_irq_type_disable() as helper
functions to control whether a given GSI interrupt type is enabled.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Keep track of the set of GSI interrupt types that are currently
enabled by recording the mask value to write (or last written) to
the TYPE_IRQ_MSK register.
Create a new helper function gsi_irq_type_update() to handle
actually writing the register.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Introduce gsi_irq_setup() and gsi_irq_teardown() to disable all
GSI interrupts when first setting up GSI hardware, and to clean
things up when we're done.
Re-enable all GSI interrupt types in gsi_irq_enable(), but do
so only after each of the type-specific interrupt masks has
been configured. Similarly, disable all interrupt types in
gsi_irq_disable()--first--before zeroing out the type-specific
masks.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Define the GSI interrupt types with an enumerated type whose values
are the bit positions representing each interrupt type. Include a
short comment describing how each interrupt type is used.
Build up the enabled interrupt mask explicitly in gsi_irq_enable(),
and get rid of the definition of GSI_CNTXT_TYPE_IRQ_MSK_ALL.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Rename the "event_enable_bitmap" field of the GSI structure to be
"ieob_enabled_bitmap". An upcoming patch will cache the last value
stored for another interrupt mask and this is a more direct naming
convention to follow.
Add a few comments to explain the bitmap fields in the GSI structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Introduce gsi_irq_init() and gsi_irq_exit(), to encapsulate looking
up the GSI IRQ and registering its handler. Call gsi_irq_init() a
little later in gsi_init(), and initialize the completion earlier.
The IRQ handler accesses both the GSI virtual memory pointer and the
completion, and this way these things will have been initialized
before the gsi_irq() can ever be called.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The GSI code is now exposed to IPA version numbers, and we handle
version-specific behavior based on the IPA version.
Modify some comments that talk about GSI versions so they reference
IPA versions instead. Correct version number errors in a couple of
these comments.
The (comment) mapping between IPA and GSI versions in the definition
of the ipa_version enumerated type remains.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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We enable a channel doorbell engine only for IPA v3.5.1, and that is
now handled directly by gsi_channel_program().
When initially setting up a channel, we want that doorbell engine
enabled, and we can request that independent of the IPA version.
Doing that makes the "legacy" argument to gsi_channel_setup_one()
unnecessary. And with that gone we can get rid of the "legacy"
argument to gsi_channel_setup(), and gsi_setup() as well.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Use the IPA version in gsi_channel_program() to determine whether
we should enable the GSI doorbell engine when requested. This way,
callers only say whether or not it should be enabled if needed,
regardless of hardware version.
Rename the "legacy" argument to gsi_channel_reset(), and have
it indicate whether the doorbell engine should be enabled when
reprogramming following the reset.
Change all callers of gsi_channel_reset() to indicate whether to
enable the doorbell engine after reset, independent of hardware
version.
Rework a little logic in ipa_endpoint_reset() to get rid of the
"legacy" variable previously passed to gsi_channel_reset().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A quirk of IPA v3.5.1 requires a channel reset on an RX channel to
be performed twice. Use the IPA version in gsi_channel_reset()
rather than the passed-in legacy flag to determine that.
This is actually a bug fix, because this double reset is supposed
to occur independent of whether we're enabling the doorbell engine.
Now they will be independent.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A quirk of IPA v4.2 requires the AP to allocate the GSI channels
that are owned by the modem.
Rather than pass a flag argument to gsi_channel_init(), use the
IPA version directly in that function to determine whether modem
channels need to be allocated.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Record the IPA version passed to gsi_init() in the GSI structure.
This allows that value to be used directly where needed, rather than
passing and storing certain flag arguments through the code.
In particular, for all but one supported version of IPA, the command
channel is programmed to only use an "escape buffer". By storing
the IPA version, we can do a simple version check in one location,
and avoid storing a flag field in every channel (and passing a flag
along while initializing channels to set that field properly).
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Although GSI is integral to IPA, it is a separate hardware component
and the IPA code supporting it has been structured to avoid explicit
dependence on IPA details. An example of this is that gsi_init() is
passed a number of Boolean flags to indicate special behaviors,
whose values are dependent on the IPA hardware version. Looking
ahead, newer hardware versions would require even more such special
behaviors.
For any given version of IPA hardware (like 3.5.1 or 4.2), the GSI
hardware version is fixed (in this case, 1.3 and 2.2, respectively).
So the IPA version *implies* the GSI version, and the IPA version
can be used as effectively the equivalent of the GSI hardware version.
Rather than proliferating new special behavior flags, just provide
the IPA version to the GSI layer when it is initialized. The GSI
code can then use that directly to determine whether special
behaviors are required. The IPA version enumerated type is already
isolated to its own header file, so the exposure of this IPA detail
is very limited.
For now, just change gsi_init() to pass the version rather than the
Boolean flags, and set the flag values internal to that function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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With IPA v3.5.1, if IPA aggregation is active at the time an
underlying GSI channel reset is performed, some special handling
is required.
There is logic in ipa_endpoint_reset() that arranges for that
special handling, but it's done for all hardware versions, not
just IPA v3.5.1.
Fix the logic to properly restrict the special behavior.
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20201102173435.5987-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The previous commit added support for IPA having up to six source
and destination resources. But currently nothing uses more than
four. (Five of each are used in a newer version of the hardware.)
I find that in one of my build environments the compiler complains
about newly-added code in two spots. Inspection shows that the
warnings have no merit, but this compiler does not recognize that.
ipa_main.c:457:39: warning: array index 5 is past the end of the
array (which contains 4 elements) [-Warray-bounds]
(and the same warning at line 483)
We can make this warning go away by changing the number of elements
in the source and destination resource limit arrays--now rather than
waiting until we need it to support the newer hardware. This change
was coming soon anyway; make it now to get rid of the warning.
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20201031151524.32132-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The minimum and maximum limits for resources assigned to a given
resource group are programmed in pairs, with the limits for two
groups set in a single register.
If the number of supported resource groups is odd, only half of the
register that defines these limits is valid for the last group; that
group has no second group in the pair.
Currently we ignore this constraint, and it turns out to be harmless,
but it is not guaranteed to be. This patch addresses that, and adds
support for programming the 5th resource group's limits.
Rework how the resource group limit registers are programmed by
having a single function program all group pairs rather than having
one function program each pair. Add the programming of the 4-5
resource group pair limits to this function. If a resource group is
not supported, pass a null pointer to ipa_resource_config_common()
for that group and have that function write zeroes in that case.
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The number of resource groups supported by the hardware can be
different for source and destination resources. Determine the
number supported for each using separate functions. Make the
functions inline end move their definitions into "ipa_reg.h",
because they determine whether certain register definitions are
valid. Pass just the IPA hardware version as argument.
IPA_RESOURCE_GROUP_COUNT represents the maximum number of resource
groups the driver supports for any hardware version. Change that
symbol to be two separate constants, one for source and the other
for destination resource groups. Rename them to end with "_MAX"
rather than "_COUNT", to reflect their true purpose.
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The IPA hardware manages various resources (e.g. descriptors)
internally to perform its functions. The resources are grouped,
allowing different endpoints to use separate resource pools. This
way one group of endpoints can be configured to operate unaffected
by the resource use of endpoints in a different group.
Endpoints should be assigned to a resource group, but we currently
don't do that.
Define a new resource_group field in the endpoint configuration
data, and use it to assign the proper resource group to use for
each AP endpoint.
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The mask for the RSRC_GRP field in the INIT_RSRC_GRP endpoint
initialization register is incorrectly defined for IPA v4.2 (where
it is only one bit wide). So we need to fix this.
The fix is not straightforward, however. Field masks are passed to
functions like u32_encode_bits(), and for that they must be constant.
To address this, we define a new inline function that returns the
*encoded* value to use for a given RSRC_GRP field, which depends on
the IPA version. The caller can then use something like this, to
assign a given endpoint resource id 1:
u32 offset = IPA_REG_ENDP_INIT_RSRC_GRP_N_OFFSET(endpoint_id);
u32 val = rsrc_grp_encoded(ipa->version, 1);
iowrite32(val, ipa->reg_virt + offset);
The next patch requires this fix.
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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At the end of ipa_mem_setup() we write the local packet processing
context base register to tell it where the processing context memory
is. But we are writing the wrong value.
The value written turns out to be the offset of the modem header
memory region (assigned earlier in the function). Fix this bug.
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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IPA transactions describe actions to be performed by the IPA
hardware. Three cases use IPA transactions: transmitting a socket
buffer; providing a page to receive packet data; and issuing an IPA
immediate command. An IPA transaction contains a scatter/gather
list (SGL) to hold the set of actions to be performed.
We map buffers in the SGL for DMA at the time they are added to the
transaction. For skb TX transactions, we fill the SGL with a call
to skb_to_sgvec(). Page RX transactions involve a single page
pointer, and that is recorded in the SGL with sg_set_page(). In
both of these cases we then map the SGL for DMA with a call to
dma_map_sg().
Immediate commands are different. The payload for an immediate
command comes from a region of coherent DMA memory, which must
*not* be mapped for DMA. For that reason, gsi_trans_cmd_add()
sort of hand-crafts each SGL entry added to a command transaction.
This patch fixes a problem with the code that crafts the SGL entry
for an immediate command. Previously a portion of the SGL entry was
updated using sg_set_buf(). However this is not valid because it
includes a call to virt_to_page() on the buffer, but the command
buffer pointer is not a linear address.
Since we never actually map the SGL for command transactions, there
are very few fields in the SGL we need to fill. Specifically, we
only need to record the DMA address and the length, so they can be
used by __gsi_trans_commit() to fill a TRE. We additionally need to
preserve the SGL flags so for_each_sg() still works. For that we
can simply assign a null page pointer for command SGL entries.
Fixes: 9dd441e4ed575 ("soc: qcom: ipa: GSI transactions")
Reported-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20201022010029.11877-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Minor conflicts in net/mptcp/protocol.h and
tools/testing/selftests/net/Makefile.
In both cases code was added on both sides in the same place
so just keep both.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When processing a system suspend request we suspend modem endpoints
if they are enabled, and call ipa_cmd_tag_process() (which issues
IPA commands) to ensure the IPA pipeline is cleared. It is an error
to attempt to issue an IPA command before setup is complete, so this
is clearly a bug. But we also shouldn't suspend or resume any
endpoints that have not been set up.
Have ipa_endpoint_suspend() and ipa_endpoint_resume() immediately
return if setup hasn't completed, to avoid any attempt to configure
endpoints or issue IPA commands in that case.
Fixes: 84f9bd12d46d ("soc: qcom: ipa: IPA endpoints")
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In ipa_uc_response_hdlr() a comment uses the wrong function name
when it describes where a clock reference is taken. Fix this.
Also fix the comment in ipa_uc_response_hdlr() to correctly refer to
ipa_uc_setup(), which is where the clock reference described here is
taken.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When "W=2" is supplied to the build command, we get a warning about
shadowing a global declaration (of a typedef) for a variable defined
in ipa_probe(). Rename the variable to get rid of the warning.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix two spots where a variable "channel_id" is unnecessarily
redefined inside loops in "gsi.c". This is warned about if
"W=2" is added to the build command.
Note that this problem is harmless, so there's no need to backport
it as a bugfix.
Remove a comment in gsi_init() about waking the system; the GSI
interrupt does not wake the system any more.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The GSI general interrupt is managed by three registers: enable;
status; and clear. The three registers have same set of field bits
at the same locations. Use a common set of field masks for all
three registers to avoid duplication.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The GSI global interrupt is managed by three registers: enable;
status; and clear. The three registers have same set of field bits
at the same locations. Use a common set of field masks for all
three registers to avoid duplication.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The GSI interrupt type register and interrupt type mask register
have the same field bits at the same locations. Use a common set of
field masks for both registers rather than essentially duplicating
them. The only place the interrupt mask register uses any of these
is in gsi_irq_enable().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Most of the field masks used for fields in a status structure are
unused. Remove their definitions; we can add them back again when
we actually use them to handle arriving status messages. These are
warned about if "W=2" is added to the build command.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Only the deaggregation status exception type is ever actually used.
If any other status exception type is reported we basically ignore
it, and consume the packet. Remove the unused definitions of status
exception type symbols; they can be added back when we actually
handle them.
Separately, two consecutive if statements test the same condition
near the top of ipa_endpoint_suspend_one(). Instead, use a single
test with a block that combines the previously-separate lines of
code.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Three status opcodes are not currently supported. Symbols
representing their numeric values are defined but never used.
Remove those unused definitions; they can be defined again
when they actually get used.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In "gsi_trans.c", the field mask TRE_FLAGS_IEOB_FMASK is defined but
never used. Although there's no harm in defining this, remove it
for now and redefine it at some future date if it becomes needed.
This is warned about if "W=2" is added to the build command.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Two minor conflicts:
1) net/ipv4/route.c, adding a new local variable while
moving another local variable and removing it's
initial assignment.
2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes.
One pretty prints the port mode differently, whilst another
changes the driver to try and obtain the port mode from
the port node rather than the switch node.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We now trigger a system resume when we receive an IPA SUSPEND
interrupt. We should *not* wake up on GSI interrupts.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that we handle wakeup interrupts properly, arrange for the IPA
interrupt to be treated as a wakeup interrupt.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The previous patch causes a system resume to be triggered when a
packet is available for receipt on a suspended RX endpoint.
The CLOCK_HELD flag was previously used to indicate that an extra
clock reference was held, preventing suspend. But we no longer need
such a flag:
- We take an initial reference in ipa_config().
- That reference is held until ipa_suspend() releases it.
- A subsequent system resume leads to a reference getting
re-acquired in ipa_resume().
- This can repeat until ultimately the module is removed, where
ipa_remove() releases the reference.
We no longer need a special flag to determine whether this extra
reference is held--it is, provided probe has completed successfully
and the driver is not suspended (or removed).
On the other hand, once suspended, it's possible for more than one
endpoint to trip the IPA SUSPEND interrupt, and we only want to
trigger the system resume once. So repurpose the Boolean CLOCK_HELD
flag to record whether the IPA SUSPEND handler should initiate a
system resume.
The flag will be be cleared each time ipa_suspend() is called,
*before* any endpoints are suspended. And it will be set inside the
IPA SUSPEND interrupt handler exactly once per suspend.
Rename the flag IPA_FLAG_RESUMED to reflect its new purpose.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The call to wakeup_source_register() in ipa_probe() does not do what
it was intended to do. Call device_init_wakeup() in ipa_setup()
instead, to set the IPA device as wakeup-capable and to initially
enable wakeup capability.
When we receive a SUSPEND interrupt, call pm_wakeup_dev_event()
with a zero processing time, to simply call for a resume without
any other processing. The ipa_resume() call will take care of
waking things up again, and will handle receiving the packet.
Note that this gets rid of a clock reference counting bug that
occurred when handling an IPA SUSPEND interrupt. Specifically,
ipa_suspend_handler() took an IPA clock reference *in addition*
to the one taken by ipa_resume(). There is no need to back-port
this fix however, because it only affects code that was not
previously working (this patch is part of fixing that).
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, when (before) the last IPA clock reference is dropped,
all endpoints are suspended. And whenever the first IPA clock
reference is taken, all endpoints are resumed (or started).
In most cases there's no need to start endpoints when the clock
starts. So move the calls to ipa_endpoint_suspend() and
ipa_endpoint_resume() out of ipa_clock_put() and ipa_clock_get(),
respectiely. Instead, only suspend endpoints when handling a system
suspend, and only resume endpoints when handling a system resume.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We take a clock reference in ipa_config() in order to prevent the
the IPA clock from being shutdown until a power management suspend
request arrives. An atomic field in the IPA structure records
whether that extra reference had been taken.
Rather than using an atomic to represent a Boolean value, define
a new flags bitmap, and define a "clock held" flag to represent
whether the extra clock reference has been taken.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Take advantage of the checking provided by refcount_t, rather than
using a plain atomic to represent the IPA clock reference count.
Note that we need to *set* the value to 1 in ipa_clock_get() rather
than incrementing it from 0 (because doing that is considered an
error for a refcount_t).
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Looks like u32p_replace_bits() should be used instead of
u32_replace_bits() which does not modifies the value but returns the
modified version.
Fixes: 2b9feef2b6c2 ("soc: qcom: ipa: filter and routing tables")
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove linux/notifier.h which is included more than once
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson:
"This introduces a new "detached" state for remote processors that are
deemed to be running at the time Linux boots and the infrastructure
for "attaching" to these. It then introduces the support for
performing this operation for the STM32 platform.
The coredump functionality is moved out from the core file and gains
support for an optional mode where the recovery phase awaits the
notification from devcoredump that the dump should be released. This
allows userspace to grab the coredump in scenarios where vmalloc space
is too low for creating a complete copy of the coredump before handing
this to devcoredump.
A new character device based interface is introduced to allow tying
the stoppage of a remote processor to the termination of a user space
process. This is useful in situations when such process provides
crucial resources/operations for the firmware running on the remote
processor.
The Texas Instrument K3 driver gains support for the C66x and C71x
DSPs.
Qualcomm remoteprocs gains support for stashing relocation information
in IMEM, to aid post mortem debugging and the crash notification
mechanism is generalized to be reusable in cases where loosely coupled
drivers needs to know about the status of a remote processor. One such
example is the IPA hardware block, which is jointly owned with the
modem and migrated to this improved interface.
It also introduces a number of bug fixes and debug improvements for
the Qualcomm modem remoteproc driver.
And it cleans up the inconsistent interface for remoteproc drivers to
implement power management"
* tag 'rproc-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc: (56 commits)
remoteproc: core: Register the character device interface
remoteproc: Add remoteproc character device interface
remoteproc: kill IPA notify code
net: ipa: new notification infrastructure
remoteproc: k3-dsp: Add support for C71x DSPs
dt-bindings: remoteproc: k3-dsp: Update bindings for C71x DSPs
remoteproc: k3-dsp: Add support for L2RAM loading on C66x DSPs
remoteproc: k3-dsp: Add a remoteproc driver of K3 C66x DSPs
dt-bindings: remoteproc: Add bindings for C66x DSPs on TI K3 SoCs
remoteproc: k3: Add TI-SCI processor control helper functions
remoteproc: Introduce rproc_of_parse_firmware() helper
dt-bindings: arm: keystone: Add common TI SCI bindings
remoteproc: qcom_q6v5_mss: Remove redundant running state
remoteproc: qcom: q6v5: Update running state before requesting stop
remoteproc: qcom_q6v5_mss: Add modem debug policy support
remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load
remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load
rpmsg: update documentation
remoteproc: qcom_q6v5_mss: Add MBA log extraction support
remoteproc: Add coredump debugfs entry
...
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Use the new SSR notifier infrastructure to request notifications of
modem events, rather than the remoteproc IPA notification system.
The latter was put in place temporarily with the knowledge that the
new mechanism would become available.
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20200724181142.13581-2-elder@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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