* [PATCH] [backport for 5.10] powerpc/603: Fix protection of user pages mapped with PROT_NONE
From: Christophe Leroy @ 2021-03-11 18:24 UTC (permalink / raw)
To: stable, gregkh; +Cc: linuxppc-dev, linux-kernel
(cherry picked from commit c119565a15a628efdfa51352f9f6c5186e506a1c)
On book3s/32, page protection is defined by the PP bits in the PTE
which provide the following protection depending on the access
keys defined in the matching segment register:
- PP 00 means RW with key 0 and N/A with key 1.
- PP 01 means RW with key 0 and RO with key 1.
- PP 10 means RW with both key 0 and key 1.
- PP 11 means RO with both key 0 and key 1.
Since the implementation of kernel userspace access protection,
PP bits have been set as follows:
- PP00 for pages without _PAGE_USER
- PP01 for pages with _PAGE_USER and _PAGE_RW
- PP11 for pages with _PAGE_USER and without _PAGE_RW
For kernelspace segments, kernel accesses are performed with key 0
and user accesses are performed with key 1. As PP00 is used for
non _PAGE_USER pages, user can't access kernel pages not flagged
_PAGE_USER while kernel can.
For userspace segments, both kernel and user accesses are performed
with key 0, therefore pages not flagged _PAGE_USER are still
accessible to the user.
This shouldn't be an issue, because userspace is expected to be
accessible to the user. But unlike most other architectures, powerpc
implements PROT_NONE protection by removing _PAGE_USER flag instead of
flagging the page as not valid. This means that pages in userspace
that are not flagged _PAGE_USER shall remain inaccessible.
To get the expected behaviour, just mimic other architectures in the
TLB miss handler by checking _PAGE_USER permission on userspace
accesses as if it was the _PAGE_PRESENT bit.
Note that this problem only is only for 603 cores. The 604+ have
an hash table, and hash_page() function already implement the
verification of _PAGE_USER permission on userspace pages.
Fixes: f342adca3afc ("powerpc/32s: Prepare Kernel Userspace Access Protection")
Change-Id: I68bc5e5ff4542bdfcdcd12923fa96a5811707475
Cc: stable@vger.kernel.org # v5.2+
Reported-by: Christoph Plattner <christoph.plattner@thalesgroup.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4a0c6e3bb8f0c162457bf54d9bc6fd8d7b55129f.1612160907.git.christophe.leroy@csgroup.eu
---
arch/powerpc/kernel/head_book3s_32.S | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
index 2729d8fa6e77..96b45901da64 100644
--- a/arch/powerpc/kernel/head_book3s_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -461,10 +461,11 @@ InstructionTLBMiss:
cmplw 0,r1,r3
#endif
mfspr r2, SPRN_SPRG_PGDIR
- li r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC
+ li r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC | _PAGE_USER
#if defined(CONFIG_MODULES) || defined(CONFIG_DEBUG_PAGEALLOC)
bgt- 112f
lis r2, (swapper_pg_dir - PAGE_OFFSET)@ha /* if kernel address, use */
+ li r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC
addi r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l /* kernel page table */
#endif
112: rlwimi r2,r3,12,20,29 /* insert top 10 bits of address */
@@ -523,9 +524,10 @@ DataLoadTLBMiss:
lis r1, TASK_SIZE@h /* check if kernel address */
cmplw 0,r1,r3
mfspr r2, SPRN_SPRG_PGDIR
- li r1, _PAGE_PRESENT | _PAGE_ACCESSED
+ li r1, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER
bgt- 112f
lis r2, (swapper_pg_dir - PAGE_OFFSET)@ha /* if kernel address, use */
+ li r1, _PAGE_PRESENT | _PAGE_ACCESSED
addi r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l /* kernel page table */
112: rlwimi r2,r3,12,20,29 /* insert top 10 bits of address */
lwz r2,0(r2) /* get pmd entry */
@@ -599,9 +601,10 @@ DataStoreTLBMiss:
lis r1, TASK_SIZE@h /* check if kernel address */
cmplw 0,r1,r3
mfspr r2, SPRN_SPRG_PGDIR
- li r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED
+ li r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER
bgt- 112f
lis r2, (swapper_pg_dir - PAGE_OFFSET)@ha /* if kernel address, use */
+ li r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED
addi r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l /* kernel page table */
112: rlwimi r2,r3,12,20,29 /* insert top 10 bits of address */
lwz r2,0(r2) /* get pmd entry */
--
2.25.0
^ permalink raw reply related
* Re: [PATCH v2 25/43] powerpc/32: Replace ASM exception exit by C exception exit from ppc64
From: Christophe Leroy @ 2021-03-11 19:39 UTC (permalink / raw)
To: Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, npiggin
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <87tuphkdkz.fsf@mpe.ellerman.id.au>
Le 11/03/2021 à 14:46, Michael Ellerman a écrit :
> Christophe Leroy <christophe.leroy@csgroup.eu> writes:
>> This patch replaces the PPC32 ASM exception exit by C exception exit.
>>
>> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
>> ---
>> arch/powerpc/kernel/entry_32.S | 481 +++++++++-----------------------
>> arch/powerpc/kernel/interrupt.c | 4 +
>> 2 files changed, 132 insertions(+), 353 deletions(-)
>
> Bisect points to this breaking qemu mac99 for me, with pmac32_defconfig.
>
> I haven't had time to dig any deeper sorry.
Embarrasing ...
I don't get this problem on the 8xx (nohash/32) or the 83xx (book3s/32).
I don't get this problem with qemu mac99 when using my klibc-based initramfs.
I managed to reproduce it with the rootfs.cpio that I got some time ago from linuxppc github Wiki.
I'll investigate it tomorrow.
Thanks
Christophe
>
> cheers
>
>
> Freeing unused kernel memory: 1132K
> This architecture does not have kernel memory protection.
> Run /init as init process
> init[1]: User access of kernel address (fffffd20) - exploit attempt? (uid: 0)
> init[1]: segfault (11) at fffffd20 nip b7e78638 lr b7e845e4 code 1 in ld-2.27.so[b7e6b000+22000]
> init[1]: code: 92010080 92210084 92410088 92810090 92a10094 92c10098 930100a0 932100a4
> init[1]: code: 934100a8 936100ac 93a100b4 91810074 <7d41496e> 39400000 3b810017 579c0036
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00ERROR: Error: saw oops/warning etc. while expecting
> 00000b
> CPU: 0 PID: 1 Comm: init Not tainted 5.12.0-rc2+ #1
> Call Trace:
> [f1019d80] [c004f1ec] panic+0x138/0x328 (unreliable)
> [f1019de0] [c0051c8c] do_exit+0x880/0x8f4
> [f1019e30] [c0052bdc] do_group_exit+0x40/0xa4
> [f1019e50] [c0060d04] get_signal+0x1e8/0x834
> [f1019eb0] [c000b624] do_notify_resume+0xc8/0x314
> [f1019f10] [c0010da8] interrupt_exit_user_prepare+0xa4/0xdc
> [f1019f30] [c0018228] interrupt_return+0x14/0x14c
> --- interrupt: 300 at 0xb7e78638
> NIP: b7e78638 LR: b7e845e4 CTR: c01ea2d8
> REGS: f1019f40 TRAP: 0300 Not tainted (5.12.0-rc2+)
> MSR: 0000d032 <EE,PR,ME,IR,DR,RI> CR: 28004422 XER: 20000000
> DAR: fffffd20 DSISR: 42000000
> GPR00: b7e845e4 bf951440 00000000 bf951460 00000000 bf951718 fefefeff 7f7f7f7f
> GPR08: bf9516b0 406ae8e0 b7eac1d4 00000000 0a12247b 00000000 b7e8a0d0 b7e78554
> GPR16: bf951730 bf9516f0 b7eaaf40 bf9516f0 00000001 b7eaa688 10002178 bf951460
> GPR24: 00000000 00000000 b7eac200 100cff38 bf9516f0 10002179 b7e845e4 bf951440
> NIP [b7e78638] 0xb7e78638
> LR [b7e845e4] 0xb7e845e4
> --- interrupt: 300
> Rebooting in 180 seconds..
>
^ permalink raw reply
* Re: Errant readings on LM81 with T2080 SoC
From: Chris Packham @ 2021-03-11 21:17 UTC (permalink / raw)
To: Wolfram Sang, Guenter Roeck
Cc: linux-hwmon@vger.kernel.org, jdelvare@suse.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
In-Reply-To: <20210311081842.GA1070@ninjato>
On 11/03/21 9:18 pm, Wolfram Sang wrote:
>> Bummer. What is really weird is that you see clock stretching under
>> CPU load. Normally clock stretching is triggered by the device, not
>> by the host.
> One example: Some hosts need an interrupt per byte to know if they
> should send ACK or NACK. If that interrupt is delayed, they stretch the
> clock.
>
It feels like something like that is happening. Looking at the T2080
Reference manual there is an interesting timing diagram (Figure 14-2 if
someone feels like looking it up). It shows SCL low between the ACK for
the address and the data byte. I think if we're delayed in sending the
next byte we could violate Ttimeout or Tlow:mext from the SMBUS spec.
^ permalink raw reply
* Re: Errant readings on LM81 with T2080 SoC
From: Guenter Roeck @ 2021-03-11 21:34 UTC (permalink / raw)
To: Chris Packham, Wolfram Sang
Cc: linux-hwmon@vger.kernel.org, jdelvare@suse.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
In-Reply-To: <94dfa9dc-a80c-98ba-4169-44cce3d810f7@alliedtelesis.co.nz>
On 3/11/21 1:17 PM, Chris Packham wrote:
>
> On 11/03/21 9:18 pm, Wolfram Sang wrote:
>>> Bummer. What is really weird is that you see clock stretching under
>>> CPU load. Normally clock stretching is triggered by the device, not
>>> by the host.
>> One example: Some hosts need an interrupt per byte to know if they
>> should send ACK or NACK. If that interrupt is delayed, they stretch the
>> clock.
>>
> It feels like something like that is happening. Looking at the T2080
> Reference manual there is an interesting timing diagram (Figure 14-2 if
> someone feels like looking it up). It shows SCL low between the ACK for
> the address and the data byte. I think if we're delayed in sending the
> next byte we could violate Ttimeout or Tlow:mext from the SMBUS spec.
>
I think that really leaves you only two options that I can see:
Rework the driver to handle critical actions (such as setting TXAK,
and everything else that might result in clock stretching) in the
interrupt handler, or rework the driver to handle everything in
a high priority kernel thread.
Guenter
^ permalink raw reply
* Re: [PATCH v2 25/43] powerpc/32: Replace ASM exception exit by C exception exit from ppc64
From: Michael Ellerman @ 2021-03-11 23:26 UTC (permalink / raw)
To: Christophe Leroy, Benjamin Herrenschmidt, Paul Mackerras, npiggin
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <0296d1bc-b37e-43c8-06cf-00ec458fb74e@csgroup.eu>
Christophe Leroy <christophe.leroy@csgroup.eu> writes:
> Le 11/03/2021 à 14:46, Michael Ellerman a écrit :
>> Christophe Leroy <christophe.leroy@csgroup.eu> writes:
>>> This patch replaces the PPC32 ASM exception exit by C exception exit.
>>>
>>> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
>>> ---
>>> arch/powerpc/kernel/entry_32.S | 481 +++++++++-----------------------
>>> arch/powerpc/kernel/interrupt.c | 4 +
>>> 2 files changed, 132 insertions(+), 353 deletions(-)
>>
>> Bisect points to this breaking qemu mac99 for me, with pmac32_defconfig.
>>
>> I haven't had time to dig any deeper sorry.
>
> Embarrasing ...
Nah, these things happen.
> I don't get this problem on the 8xx (nohash/32) or the 83xx (book3s/32).
> I don't get this problem with qemu mac99 when using my klibc-based initramfs.
>
> I managed to reproduce it with the rootfs.cpio that I got some time ago from linuxppc github Wiki.
OK.
I'm using the ppc-rootfs.cpio.gz from here:
https://github.com/linuxppc/ci-scripts/blob/master/root-disks/Makefile
And the boot script is:
https://github.com/linuxppc/ci-scripts/blob/master/scripts/boot/qemu-mac99
I've been meaning to write docs on how to use those scripts, but haven't
got around to it.
There's nothing really special though it's just a wrapper around qemu -M mac99.
> I'll investigate it tomorrow.
Thanks.
cheers
^ permalink raw reply
* Re: PowerPC64 future proof kernel toc, revised for lld
From: Michael Ellerman @ 2021-03-11 23:32 UTC (permalink / raw)
To: Alan Modra, Christophe Leroy; +Cc: alexey, Alexey Kardashevskiy, linuxppc-dev
In-Reply-To: <20210310234135.GC29645@bubble.grove.modra.org>
Alan Modra <amodra@gmail.com> writes:
> On Wed, Mar 10, 2021 at 01:44:57PM +0100, Christophe Leroy wrote:
>>
>> Le 10/03/2021 à 13:25, Alan Modra a écrit :
>> > On Wed, Mar 10, 2021 at 08:33:37PM +1100, Alexey Kardashevskiy wrote:
>> > > One more question - the older version had a construct "DEFINED (.TOC.) ?
>> > > .TOC. : ..." in case .TOC. is not defined (too old ld? too old gcc?) but the
>> > > newer patch seems assuming it is always defined, when was it added? I have
>> > > the same check in SLOF, for example, do I still need it?
>> >
>> > .TOC. symbol support was first added 2012-11-06, so you need
>> > binutils-2.24 or later to use .TOC. as a symbol.
>> >
>>
>> As of today, minimum requirement to build kernel is binutils 2.23, see https://urldefense.proofpoint.com/v2/url?u=https-3A__www.kernel.org_doc_html_latest_process_changes.html-23current-2Dminimal-2Drequirements&d=DwIDAw&c=jf_iaSHvJObTbx-siA1ZOg&r=uzpscot8Q8p-51o1Gp1vnzKV94bfny2qmUdVe821lv0&m=SYi605mn0I1hf1QoHuvHXtS_Z-R6JJHbzS34cEtV2Tk&s=47ckf3yxVcP6RwRb8D9viYOQSWpf6rXrnWj4YM4OTJ0&e=
>
> Yes, and arch/powerpc/Makefile complains about 2.24. So for powerpc
> that means you need to go to at least 2.25.
Not quite. It only complains for little endian builds, and only if you
have stock 2.24, it will allow a 2.24.<something>.
I do most of my builds with 2.34, so I have no issue with newer
binutils. But we try not to increase the minimum version too rapidly to
accommodate folks using older and/or "Enterprise" distros that are stuck
on old toolchains.
I think we are within our rights to increase the minimum requirement for
powerpc builds, if it brings advantages we can identify.
The way to do that would be to add a new check in our arch Makefile that
rejects the older versions.
cheers
^ permalink raw reply
* Re: Errant readings on LM81 with T2080 SoC
From: Chris Packham @ 2021-03-11 23:47 UTC (permalink / raw)
To: Guenter Roeck, Wolfram Sang
Cc: linux-hwmon@vger.kernel.org, jdelvare@suse.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
In-Reply-To: <725c5e51-65df-e17d-e2da-0982efacf2d2@roeck-us.net>
On 12/03/21 10:34 am, Guenter Roeck wrote:
> On 3/11/21 1:17 PM, Chris Packham wrote:
>> On 11/03/21 9:18 pm, Wolfram Sang wrote:
>>>> Bummer. What is really weird is that you see clock stretching under
>>>> CPU load. Normally clock stretching is triggered by the device, not
>>>> by the host.
>>> One example: Some hosts need an interrupt per byte to know if they
>>> should send ACK or NACK. If that interrupt is delayed, they stretch the
>>> clock.
>>>
>> It feels like something like that is happening. Looking at the T2080
>> Reference manual there is an interesting timing diagram (Figure 14-2 if
>> someone feels like looking it up). It shows SCL low between the ACK for
>> the address and the data byte. I think if we're delayed in sending the
>> next byte we could violate Ttimeout or Tlow:mext from the SMBUS spec.
>>
> I think that really leaves you only two options that I can see:
> Rework the driver to handle critical actions (such as setting TXAK,
> and everything else that might result in clock stretching) in the
> interrupt handler, or rework the driver to handle everything in
> a high priority kernel thread.
One thing I've found that does seem to avoid the problem is to disable
preemption, use polling and replace the schedule() in i2c_wait() with
udelay(50). That's kind of like the kernel thread option.
> Guenter
^ permalink raw reply
* Re: Errant readings on LM81 with T2080 SoC
From: Guenter Roeck @ 2021-03-12 0:07 UTC (permalink / raw)
To: Chris Packham, Wolfram Sang
Cc: linux-hwmon@vger.kernel.org, jdelvare@suse.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
In-Reply-To: <309f94fa-40ec-c3be-7cdf-78a910a5b209@alliedtelesis.co.nz>
On 3/11/21 3:47 PM, Chris Packham wrote:
>
> On 12/03/21 10:34 am, Guenter Roeck wrote:
>> On 3/11/21 1:17 PM, Chris Packham wrote:
>>> On 11/03/21 9:18 pm, Wolfram Sang wrote:
>>>>> Bummer. What is really weird is that you see clock stretching under
>>>>> CPU load. Normally clock stretching is triggered by the device, not
>>>>> by the host.
>>>> One example: Some hosts need an interrupt per byte to know if they
>>>> should send ACK or NACK. If that interrupt is delayed, they stretch the
>>>> clock.
>>>>
>>> It feels like something like that is happening. Looking at the T2080
>>> Reference manual there is an interesting timing diagram (Figure 14-2 if
>>> someone feels like looking it up). It shows SCL low between the ACK for
>>> the address and the data byte. I think if we're delayed in sending the
>>> next byte we could violate Ttimeout or Tlow:mext from the SMBUS spec.
>>>
>> I think that really leaves you only two options that I can see:
>> Rework the driver to handle critical actions (such as setting TXAK,
>> and everything else that might result in clock stretching) in the
>> interrupt handler, or rework the driver to handle everything in
>> a high priority kernel thread.
> One thing I've found that does seem to avoid the problem is to disable
> preemption, use polling and replace the schedule() in i2c_wait() with
> udelay(50). That's kind of like the kernel thread option.
It is kind of hackish, though, especially since it makes the "loaded system"
situation even worse by adding even more active wait loops.
Guenter
^ permalink raw reply
* Re: Errant readings on LM81 with T2080 SoC
From: Chris Packham @ 2021-03-12 0:19 UTC (permalink / raw)
To: Guenter Roeck, Wolfram Sang
Cc: linux-hwmon@vger.kernel.org, jdelvare@suse.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-i2c@vger.kernel.org
In-Reply-To: <62ee2a1c-19ea-8287-a438-ef7bdf5472de@roeck-us.net>
On 12/03/21 1:07 pm, Guenter Roeck wrote:
> On 3/11/21 3:47 PM, Chris Packham wrote:
>> On 12/03/21 10:34 am, Guenter Roeck wrote:
>>> On 3/11/21 1:17 PM, Chris Packham wrote:
>>>> On 11/03/21 9:18 pm, Wolfram Sang wrote:
>>>>>> Bummer. What is really weird is that you see clock stretching under
>>>>>> CPU load. Normally clock stretching is triggered by the device, not
>>>>>> by the host.
>>>>> One example: Some hosts need an interrupt per byte to know if they
>>>>> should send ACK or NACK. If that interrupt is delayed, they stretch the
>>>>> clock.
>>>>>
>>>> It feels like something like that is happening. Looking at the T2080
>>>> Reference manual there is an interesting timing diagram (Figure 14-2 if
>>>> someone feels like looking it up). It shows SCL low between the ACK for
>>>> the address and the data byte. I think if we're delayed in sending the
>>>> next byte we could violate Ttimeout or Tlow:mext from the SMBUS spec.
>>>>
>>> I think that really leaves you only two options that I can see:
>>> Rework the driver to handle critical actions (such as setting TXAK,
>>> and everything else that might result in clock stretching) in the
>>> interrupt handler, or rework the driver to handle everything in
>>> a high priority kernel thread.
>> One thing I've found that does seem to avoid the problem is to disable
>> preemption, use polling and replace the schedule() in i2c_wait() with
>> udelay(50). That's kind of like the kernel thread option.
> It is kind of hackish, though, especially since it makes the "loaded system"
> situation even worse by adding even more active wait loops.
No -ish about it :). But it might put out one fire for me while I'm
looking at doing some kind of interrupt driven state machine.
^ permalink raw reply
* Re: [PATCH v2 36/43] powerpc/32: Set current->thread.regs in C interrupt entry
From: Nicholas Piggin @ 2021-03-12 1:00 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Christophe Leroy, Michael Ellerman,
Paul Mackerras
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <5a80e05e-27d7-0e95-67c7-0fe3255c4be1@csgroup.eu>
Excerpts from Christophe Leroy's message of March 11, 2021 10:38 pm:
>
>
> Le 11/03/2021 à 11:38, Christophe Leroy a écrit :
>>
>>
>> Le 10/03/2021 à 02:33, Nicholas Piggin a écrit :
>>> Excerpts from Christophe Leroy's message of March 9, 2021 10:10 pm:
>>>> No need to do that is assembly, do it in C.
>>>
>>> Hmm. No issues with the patch as such, but why does ppc32 need this but
>>> not 64? AFAIKS 64 sets this when a thread is created.
>>
>> Looks like ppc64 was doing the same in function save_remaining_regs() in arch/ppc64/kernel/head.S
>> until commit https://github.com/mpe/linux-fullhistory/commit/e5bb080d
>>
>> But I can't find what happend to it in that commit.
>>
>> Where is it done now ? Maybe that's also already done for ppc32.
>>
>
> I digged a bit more and found a later bug fix which adds that setting of current->thread.regs at
> task creation: https://github.com/mpe/linux-fullhistory/commit/3eac1897
>
> That was in the ppc64 tree only at that time, and was merged into the common powerpc tree via commit
> https://github.com/mpe/linux-fullhistory/commit/06d67d54
Nice archaeology!
> So we have it for both ppc32 and ppc64 and ppc32 doesn't need to do it at exception entry anymore.
> I'll remove it.
Good, that's what I hoped (otherwise ppc64 would have been missing
something).
Thanks,
Nick
^ permalink raw reply
* Re: [PATCH] KVM: PPC: Book3S HV: Do not expose HFSCR sanitisation to nested hypervisor
From: Nicholas Piggin @ 2021-03-12 1:13 UTC (permalink / raw)
To: Paul Mackerras; +Cc: linuxppc-dev, kvm-ppc, Fabiano Rosas
In-Reply-To: <20210310092354.GA30597@blackberry>
Excerpts from Paul Mackerras's message of March 10, 2021 7:23 pm:
> On Mon, Mar 08, 2021 at 06:18:47PM +1000, Nicholas Piggin wrote:
>> Excerpts from Fabiano Rosas's message of March 6, 2021 9:10 am:
>> > As one of the arguments of the H_ENTER_NESTED hypercall, the nested
>> > hypervisor (L1) prepares a structure containing the values of various
>> > hypervisor-privileged registers with which it wants the nested guest
>> > (L2) to run. Since the nested HV runs in supervisor mode it needs the
>> > host to write to these registers.
>> >
>> > To stop a nested HV manipulating this mechanism and using a nested
>> > guest as a proxy to access a facility that has been made unavailable
>> > to it, we have a routine that sanitises the values of the HV registers
>> > before copying them into the nested guest's vcpu struct.
>> >
>> > However, when coming out of the guest the values are copied as they
>> > were back into L1 memory, which means that any sanitisation we did
>> > during guest entry will be exposed to L1 after H_ENTER_NESTED returns.
>> >
>> > This is not a problem by itself, but in the case of the Hypervisor
>> > Facility Status and Control Register (HFSCR), we use the intersection
>> > between L2 hfscr bits and L1 hfscr bits. That means that L1 could use
>> > this to indirectly read the (hv-privileged) value from its vcpu
>> > struct.
>> >
>> > This patch fixes this by making sure that L1 only gets back the bits
>> > that are necessary for regular functioning.
>>
>> The general idea of restricting exposure of HV privileged bits, but
>> for the case of HFSCR a guest can probe the HFCR anyway by testing which
>> facilities are available (and presumably an HV may need some way to know
>> what features are available for it to advertise to its own guests), so
>> is this necessary? Perhaps a comment would be sufficient.
>
> I would see it a bit differently. From L1's point of view, L0 is the
> hardware. The situation we have now is akin to writing a value to the
> real HFSCR, then reading HFSCR and finding that some of the facility
> enable bits have magically got set to zero. That's not the way real
> hardware works, so L0 shouldn't behave that way either, or at least
> not without some strong justification.
But the features disallowed by the L0 have to be viewed as unimplemented
by the hardware so the bits would be reserved, so according to
architecture they actually are allowed to return zero.
That's not my concern though, and I do agree it is a bit odd. I don't
have a problem with leaving the FC field value unchanged.
I think at least printing a warning for unimplemented bits would be good
though.
Thanks,
Nick
^ permalink raw reply
* [PATCH] powerpc/64s: power4 nap fixup in C
From: Nicholas Piggin @ 2021-03-12 1:20 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
There is no need for this to be in asm, use the new intrrupt entry wrapper.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
Hopefully this works on a real G5 now, but I couldn't reproduce the
problem with QEMU.
Thanks,
Nick
arch/powerpc/include/asm/interrupt.h | 19 +++++++++++
arch/powerpc/include/asm/processor.h | 1 +
arch/powerpc/include/asm/thread_info.h | 6 ++++
arch/powerpc/kernel/exceptions-64s.S | 45 --------------------------
arch/powerpc/kernel/idle_book3s.S | 4 +++
5 files changed, 30 insertions(+), 45 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index aedfba29e43a..ef015d3b5e39 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -9,6 +9,17 @@
#include <asm/kprobes.h>
#include <asm/runlatch.h>
+static inline void nap_adjust_return(struct pt_regs *regs)
+{
+#ifdef CONFIG_PPC_970_NAP
+ if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
+ /* Can avoid a test-and-clear because NMIs do not call this */
+ clear_thread_local_flags(_TLF_NAPPING);
+ regs->nip = (unsigned long)power4_idle_nap_return;
+ }
+#endif
+}
+
struct interrupt_state {
#ifdef CONFIG_PPC_BOOK3E_64
enum ctx_state ctx_state;
@@ -111,6 +122,9 @@ static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct int
{
irq_exit();
interrupt_exit_prepare(regs, state);
+
+ /* Adjust at exit so the main handler sees the true NIA */
+ nap_adjust_return(regs);
}
struct interrupt_nmi_state {
@@ -164,6 +178,11 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter
radix_enabled() || (mfmsr() & MSR_DR))
nmi_exit();
+ /*
+ * nmi does not call nap_adjust_return because nmi should not create
+ * new work to do (must use irq_work for that).
+ */
+
#ifdef CONFIG_PPC64
if (TRAP(regs) != 0x900 && TRAP(regs) != 0xf00 && TRAP(regs) != 0x260)
this_cpu_set_ftrace_enabled(state->ftrace_enabled);
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 8acc3590c971..eedc3c775141 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -393,6 +393,7 @@ extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val);
extern unsigned long isa206_idle_insn_mayloss(unsigned long type);
#ifdef CONFIG_PPC_970_NAP
extern void power4_idle_nap(void);
+void power4_idle_nap_return(void);
#endif
extern unsigned long cpuidle_disable;
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index 386d576673a1..bf137151100b 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -152,6 +152,12 @@ void arch_setup_new_exec(void);
#ifndef __ASSEMBLY__
+static inline void clear_thread_local_flags(unsigned int flags)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->local_flags &= ~flags;
+}
+
static inline bool test_thread_local_flags(unsigned int flags)
{
struct thread_info *ti = current_thread_info();
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 60d3051a8bc8..ea7a443488d2 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -692,25 +692,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
ld r1,GPR1(r1)
.endm
-/*
- * When the idle code in power4_idle puts the CPU into NAP mode,
- * it has to do so in a loop, and relies on the external interrupt
- * and decrementer interrupt entry code to get it out of the loop.
- * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
- * to signal that it is in the loop and needs help to get out.
- */
-#ifdef CONFIG_PPC_970_NAP
-#define FINISH_NAP \
-BEGIN_FTR_SECTION \
- ld r11, PACA_THREAD_INFO(r13); \
- ld r9,TI_LOCAL_FLAGS(r11); \
- andi. r10,r9,_TLF_NAPPING; \
- bnel power4_fixup_nap; \
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
-#else
-#define FINISH_NAP
-#endif
-
/*
* There are a few constraints to be concerned with.
* - Real mode exceptions code/data must be located at their physical location.
@@ -1248,7 +1229,6 @@ EXC_COMMON_BEGIN(machine_check_common)
*/
GEN_COMMON machine_check
- FINISH_NAP
/* Enable MSR_RI when finished with PACA_EXMC */
li r10,MSR_RI
mtmsrd r10,1
@@ -1571,7 +1551,6 @@ EXC_VIRT_BEGIN(hardware_interrupt, 0x4500, 0x100)
EXC_VIRT_END(hardware_interrupt, 0x4500, 0x100)
EXC_COMMON_BEGIN(hardware_interrupt_common)
GEN_COMMON hardware_interrupt
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -1801,7 +1780,6 @@ EXC_VIRT_BEGIN(decrementer, 0x4900, 0x80)
EXC_VIRT_END(decrementer, 0x4900, 0x80)
EXC_COMMON_BEGIN(decrementer_common)
GEN_COMMON decrementer
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl timer_interrupt
b interrupt_return
@@ -1886,7 +1864,6 @@ EXC_VIRT_BEGIN(doorbell_super, 0x4a00, 0x100)
EXC_VIRT_END(doorbell_super, 0x4a00, 0x100)
EXC_COMMON_BEGIN(doorbell_super_common)
GEN_COMMON doorbell_super
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2237,7 +2214,6 @@ EXC_COMMON_BEGIN(hmi_exception_early_common)
EXC_COMMON_BEGIN(hmi_exception_common)
GEN_COMMON hmi_exception
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl handle_hmi_exception
b interrupt_return
@@ -2266,7 +2242,6 @@ EXC_VIRT_BEGIN(h_doorbell, 0x4e80, 0x20)
EXC_VIRT_END(h_doorbell, 0x4e80, 0x20)
EXC_COMMON_BEGIN(h_doorbell_common)
GEN_COMMON h_doorbell
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2299,7 +2274,6 @@ EXC_VIRT_BEGIN(h_virt_irq, 0x4ea0, 0x20)
EXC_VIRT_END(h_virt_irq, 0x4ea0, 0x20)
EXC_COMMON_BEGIN(h_virt_irq_common)
GEN_COMMON h_virt_irq
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -2345,7 +2319,6 @@ EXC_VIRT_BEGIN(performance_monitor, 0x4f00, 0x20)
EXC_VIRT_END(performance_monitor, 0x4f00, 0x20)
EXC_COMMON_BEGIN(performance_monitor_common)
GEN_COMMON performance_monitor
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl performance_monitor_exception
b interrupt_return
@@ -3096,24 +3069,6 @@ USE_FIXED_SECTION(virt_trampolines)
__end_interrupts:
DEFINE_FIXED_SYMBOL(__end_interrupts)
-#ifdef CONFIG_PPC_970_NAP
- /*
- * Called by exception entry code if _TLF_NAPPING was set, this clears
- * the NAPPING flag, and redirects the exception exit to
- * power4_fixup_nap_return.
- */
- .globl power4_fixup_nap
-EXC_COMMON_BEGIN(power4_fixup_nap)
- andc r9,r9,r10
- std r9,TI_LOCAL_FLAGS(r11)
- LOAD_REG_ADDR(r10, power4_idle_nap_return)
- std r10,_NIP(r1)
- blr
-
-power4_idle_nap_return:
- blr
-#endif
-
CLOSE_FIXED_SECTION(real_vectors);
CLOSE_FIXED_SECTION(real_trampolines);
CLOSE_FIXED_SECTION(virt_vectors);
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index f9e6d83e6720..abb719b21cae 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -209,4 +209,8 @@ _GLOBAL(power4_idle_nap)
mtmsrd r7
isync
b 1b
+
+ .globl power4_idle_nap_return
+power4_idle_nap_return:
+ blr
#endif
--
2.23.0
^ permalink raw reply related
* Re: [PATCH v2 1/8] powerpc/xive: Use cpu_to_node() instead of ibm,chip-id property
From: David Gibson @ 2021-03-12 1:55 UTC (permalink / raw)
To: Cédric Le Goater
Cc: Daniel Henrique Barboza, Greg Kurz, QEMU Developers,
list@suse.de:PowerPC, linuxppc-dev
In-Reply-To: <92edbc26-4cb5-6e2f-00ff-43a3dca43759@kaod.org>
On Tue, 9 Mar 2021 18:26:35 +0100
Cédric Le Goater <clg@kaod.org> wrote:
> On 3/9/21 6:08 PM, Daniel Henrique Barboza wrote:
> >
> >
> > On 3/9/21 12:33 PM, Cédric Le Goater wrote:
> >> On 3/8/21 6:13 PM, Greg Kurz wrote:
> >>> On Wed, 3 Mar 2021 18:48:50 +0100
> >>> Cédric Le Goater <clg@kaod.org> wrote:
> >>>
> >>>> The 'chip_id' field of the XIVE CPU structure is used to choose a
> >>>> target for a source located on the same chip when possible. This field
> >>>> is assigned on the PowerNV platform using the "ibm,chip-id" property
> >>>> on pSeries under KVM when NUMA nodes are defined but it is undefined
> >>>
> >>> This sentence seems to have a syntax problem... like it is missing an
> >>> 'and' before 'on pSeries'.
> >>
> >> ah yes, or simply a comma.
> >>
> >>>> under PowerVM. The XIVE source structure has a similar field
> >>>> 'src_chip' which is only assigned on the PowerNV platform.
> >>>>
> >>>> cpu_to_node() returns a compatible value on all platforms, 0 being the
> >>>> default node. It will also give us the opportunity to set the affinity
> >>>> of a source on pSeries when we can localize them.
> >>>>
> >>>
> >>> IIUC this relies on the fact that the NUMA node id is == to chip id
> >>> on PowerNV, i.e. xc->chip_id which is passed to OPAL remain stable
> >>> with this change.
> >>
> >> Linux sets the NUMA node in numa_setup_cpu(). On pseries, the hcall
> >> H_HOME_NODE_ASSOCIATIVITY returns the node id if I am correct (Daniel
> >> in Cc:)
> [...]
> >>
> >> On PowerNV, Linux uses "ibm,associativity" property of the CPU to find
> >> the node id. This value is built from the chip id in OPAL, so the
> >> value returned by cpu_to_node(cpu) and the value of the "ibm,chip-id"
> >> property are unlikely to be different.
> >>
> >> cpu_to_node(cpu) is used in many places to allocate the structures
> >> locally to the owning node. XIVE is not an exception (see below in the
> >> same patch), it is better to be consistent and get the same information
> >> (node id) using the same routine.
> >>
> >>
> >> In Linux, "ibm,chip-id" is only used in low level PowerNV drivers :
> >> LPC, XSCOM, RNG, VAS, NX. XIVE should be in that list also but skiboot
> >> unifies the controllers of the system to only expose one the OS. This
> >> is problematic and should be changed but it's another topic.
> >>
> >>
> >>> On the other hand, you have the pSeries case under PowerVM that
> >>> doesn't xc->chip_id, which isn't passed to any hcall AFAICT.
> >>
> >> yes "ibm,chip-id" is an OPAL concept unfortunately and it has no meaning
> >> under PAPR. xc->chip_id on pseries (PowerVM) will contains an invalid
> >> chip id.
> >>
> >> QEMU/KVM exposes "ibm,chip-id" but it's not used. (its value is not
> >> always correct btw)
> >
> >
> > If you have a way to reliably reproduce this, let me know and I'll fix it
> > up in QEMU.
>
> with :
>
> -smp 4,cores=1,maxcpus=8 -object memory-backend-ram,id=ram-node0,size=2G -numa node,nodeid=0,cpus=0-1,cpus=4-5,memdev=ram-node0 -object memory-backend-ram,id=ram-node1,size=2G -numa node,nodeid=1,cpus=2-3,cpus=6-7,memdev=ram-node1
>
> # dmesg | grep numa
> [ 0.013106] numa: Node 0 CPUs: 0-1
> [ 0.013136] numa: Node 1 CPUs: 2-3
>
> # dtc -I fs /proc/device-tree/cpus/ -f | grep ibm,chip-id
> ibm,chip-id = <0x01>;
> ibm,chip-id = <0x02>;
> ibm,chip-id = <0x00>;
> ibm,chip-id = <0x03>;
>
> with :
>
> -smp 4,cores=4,maxcpus=8,threads=1 -object memory-backend-ram,id=ram-node0,size=2G -numa node,nodeid=0,cpus=0-1,cpus=4-5,memdev=ram-node0 -object memory-backend-ram,id=ram-node1,size=2G -numa node,nodeid=1,cpus=2-3,cpus=6-7,memdev=ram-node1
>
> # dmesg | grep numa
> [ 0.013106] numa: Node 0 CPUs: 0-1
> [ 0.013136] numa: Node 1 CPUs: 2-3
>
> # dtc -I fs /proc/device-tree/cpus/ -f | grep ibm,chip-id
> ibm,chip-id = <0x00>;
> ibm,chip-id = <0x00>;
> ibm,chip-id = <0x00>;
> ibm,chip-id = <0x00>;
>
> I think we should simply remove "ibm,chip-id" since it's not used and
> not in the PAPR spec.
As I mentioned to Daniel on our call this morning, oddly it *does*
appear to be used in the RHEL kernel, even though that's 4.18 based.
This patch seems to have caused a minor regression; not in the
identification of NUMA nodes, but in the number of sockets shown be
lscpu, etc. See https://bugzilla.redhat.com/show_bug.cgi?id=1934421
for more information.
Since the value was used by some PAPR kernels - even if they shouldn't
have - I think we should only remove this for newer machine types. We
also need to check what we're not supplying that the guest kernel is
showing a different number of sockets than specified on the qemu
command line.
>
> Thanks,
>
> C.
>
>
>
> [...]
> [...]
> [...]
> [...]
> [...]
> [...]
> [...]
> [...]
> [...]
>
--
David Gibson <dgibson@redhat.com>
Principal Software Engineer, Virtualization, Red Hat
^ permalink raw reply
* Re: [PATCH] cxl: don't manipulate the mm.mm_users field directly
From: Andrew Donnellan @ 2021-03-12 2:18 UTC (permalink / raw)
To: Laurent Dufour, fbarrat, arnd, gregkh
Cc: clombard, linuxppc-dev, linux-kernel
In-Reply-To: <20210310174405.51044-1-ldufour@linux.ibm.com>
On 11/3/21 4:44 am, Laurent Dufour wrote:
> It is better to rely on the API provided by the MM layer instead of
> directly manipulating the mm_users field.
>
> Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
LGTM, thanks for picking this up
Acked-by: Andrew Donnellan <ajd@linux.ibm.com>
--
Andrew Donnellan OzLabs, ADL Canberra
ajd@linux.ibm.com IBM Australia Limited
^ permalink raw reply
* [PATCH] scsi: ibmvscsi: delete the useless casting value returned
From: Wang Qing @ 2021-03-12 2:18 UTC (permalink / raw)
To: Tyrel Datwyler, Michael Ellerman, Benjamin Herrenschmidt,
Paul Mackerras, James E.J. Bottomley, Martin K. Petersen,
linux-scsi, linuxppc-dev, linux-kernel
Cc: Wang Qing
Fix the following coccicheck warning:
WARNING: casting value returned by memory allocation function is useless.
Signed-off-by: Wang Qing <wangqing@vivo.com>
---
drivers/scsi/ibmvscsi/ibmvscsi.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 29fcc44..f084ca10
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -717,8 +717,7 @@ static int map_sg_data(struct scsi_cmnd *cmd,
/* get indirect table */
if (!evt_struct->ext_list) {
- evt_struct->ext_list = (struct srp_direct_buf *)
- dma_alloc_coherent(dev,
+ evt_struct->ext_list = dma_alloc_coherent(dev,
SG_ALL * sizeof(struct srp_direct_buf),
&evt_struct->ext_list_token, 0);
if (!evt_struct->ext_list) {
--
2.7.4
^ permalink raw reply related
* Re: [PATCH] powerpc/vdso32: Add missing _restgpr_31_x to fix build failure
From: Segher Boessenkool @ 2021-03-12 2:29 UTC (permalink / raw)
To: Christophe Leroy; +Cc: linuxppc-dev, Paul Mackerras, linux-kernel
In-Reply-To: <a7aa198a88bcd33c6e35e99f70f86c7b7f2f9440.1615270757.git.christophe.leroy@csgroup.eu>
Hi!
On Tue, Mar 09, 2021 at 06:19:30AM +0000, Christophe Leroy wrote:
> With some defconfig including CONFIG_CC_OPTIMIZE_FOR_SIZE,
> (for instance mvme5100_defconfig and ps3_defconfig), gcc 5
> generates a call to _restgpr_31_x.
> I don't know if there is a way to tell GCC not to emit that call, because at the end we get more instructions than needed.
The function is required by the ABI, you need to have it.
You get *fewer* insns statically, and that is what -Os is about: reduce
the size of the binaries.
(The only reason you get such problems is because Linux does not have
all of libgcc. You can have that *and* have some symbols cause link
errors, it isn't rocket science).
Segher
^ permalink raw reply
* [PATCH v5 1/6] ASoC: soc-component: Add snd_soc_pcm_component_ack
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
Add snd_soc_pcm_component_ack back, which can be used to get an
updated buffer pointer in the platform driver.
On Asymmetric multiprocessor, this pointer can be sent to Cortex-M
core for audio processing.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
include/sound/soc-component.h | 3 +++
sound/soc/soc-component.c | 14 ++++++++++++++
sound/soc/soc-pcm.c | 2 ++
3 files changed, 19 insertions(+)
diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 7dc75b39287f..722cfab28d29 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -146,6 +146,8 @@ struct snd_soc_component_driver {
int (*mmap)(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct vm_area_struct *vma);
+ int (*ack)(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream);
const struct snd_compress_ops *compress_ops;
@@ -498,5 +500,6 @@ int snd_soc_pcm_component_pm_runtime_get(struct snd_soc_pcm_runtime *rtd,
void *stream);
void snd_soc_pcm_component_pm_runtime_put(struct snd_soc_pcm_runtime *rtd,
void *stream, int rollback);
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream);
#endif /* __SOC_COMPONENT_H */
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index 8415e9bd2932..3a5e84e16a87 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -1212,3 +1212,17 @@ void snd_soc_pcm_component_pm_runtime_put(struct snd_soc_pcm_runtime *rtd,
soc_component_mark_pop(component, stream, pm);
}
}
+
+int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_component *component;
+ int i;
+
+ /* FIXME: use 1st pointer */
+ for_each_rtd_components(rtd, i, component)
+ if (component->driver->ack)
+ return component->driver->ack(component, substream);
+
+ return 0;
+}
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index ba8ffbf8a5d3..e75b404a9f36 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2826,6 +2826,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
rtd->ops.page = snd_soc_pcm_component_page;
if (drv->mmap)
rtd->ops.mmap = snd_soc_pcm_component_mmap;
+ if (drv->ack)
+ rtd->ops.ack = snd_soc_pcm_component_ack;
}
if (playback)
--
2.27.0
^ permalink raw reply related
* [PATCH v5 0/6] Add audio driver base on rpmsg on i.MX platform
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
On Asymmetric multiprocessor, there is Cortex-A core and Cortex-M core,
Linux is running on A core, RTOS is running on M core.
The audio hardware device can be controlled by Cortex-M device,
So audio playback/capture can be handled by M core.
Rpmsg is the interface for sending and receiving msg to and from M
core, that we can create a virtual sound on Cortex-A core side.
A core will tell the Cortex-M core sound format/rate/channel,
where is the data buffer, what is the period size, when to start,
when to stop and when suspend or resume happen, each of this behavior
there is defined rpmsg command.
Especially we designed the low power audio case, that is to
allocate a large buffer and fill the data, then Cortex-A core can go
to sleep mode, Cortex-M core continue to play the sound, when the
buffer is consumed, Cortex-M core will trigger the Cortex-A core to
wakeup to fill data.
changes in v5:
- remove unneeded property in binding doc and driver
- update binding doc according to Rob's comments.
- Fix link issue reported by kernel test robot
changes in v4:
- remove the sound card node, merge the property to cpu dai node
according to Rob's comments.
- sound card device will be registered by cpu dai driver.
- Fix do_div issue reported by kernel test robot
changes in v3:
- add local refcount for clk enablement in hw_params()
- update the document according Rob's comments
changes in v2:
- update codes and comments according to Mark's comments
Shengjiu Wang (6):
ASoC: soc-component: Add snd_soc_pcm_component_ack
ASoC: fsl_rpmsg: Add CPU DAI driver for audio base on rpmsg
ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg audio device
ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel
ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsg
ASoC: imx-rpmsg: Add machine driver for audio base on rpmsg
.../devicetree/bindings/sound/fsl,rpmsg.yaml | 108 +++
include/sound/soc-component.h | 3 +
sound/soc/fsl/Kconfig | 30 +
sound/soc/fsl/Makefile | 6 +
sound/soc/fsl/fsl_rpmsg.c | 279 ++++++
sound/soc/fsl/fsl_rpmsg.h | 35 +
sound/soc/fsl/imx-audio-rpmsg.c | 140 +++
sound/soc/fsl/imx-pcm-rpmsg.c | 918 ++++++++++++++++++
sound/soc/fsl/imx-pcm-rpmsg.h | 512 ++++++++++
sound/soc/fsl/imx-rpmsg.c | 150 +++
sound/soc/soc-component.c | 14 +
sound/soc/soc-pcm.c | 2 +
12 files changed, 2197 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
create mode 100644 sound/soc/fsl/fsl_rpmsg.c
create mode 100644 sound/soc/fsl/fsl_rpmsg.h
create mode 100644 sound/soc/fsl/imx-audio-rpmsg.c
create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.c
create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.h
create mode 100644 sound/soc/fsl/imx-rpmsg.c
--
2.27.0
^ permalink raw reply
* [PATCH v5 2/6] ASoC: fsl_rpmsg: Add CPU DAI driver for audio base on rpmsg
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
This is a cpu dai driver for rpmsg audio use case,
which is mainly used for getting the user's configuration
from devicetree and configure the clocks which is used by
Cortex-M core.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
sound/soc/fsl/Kconfig | 10 ++
sound/soc/fsl/Makefile | 2 +
sound/soc/fsl/fsl_rpmsg.c | 279 ++++++++++++++++++++++++++++++++++++++
sound/soc/fsl/fsl_rpmsg.h | 35 +++++
4 files changed, 326 insertions(+)
create mode 100644 sound/soc/fsl/fsl_rpmsg.c
create mode 100644 sound/soc/fsl/fsl_rpmsg.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index d7f30036d434..3326f30e28f6 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -115,6 +115,16 @@ config SND_SOC_FSL_AUD2HTX
config SND_SOC_FSL_UTILS
tristate
+config SND_SOC_FSL_RPMSG
+ tristate "NXP Audio Base On RPMSG support"
+ depends on COMMON_CLK
+ depends on RPMSG
+ select SND_SOC_IMX_RPMSG if SND_IMX_SOC != n
+ help
+ Say Y if you want to add rpmsg audio support for the Freescale CPUs.
+ This option is only useful for out-of-tree drivers since
+ in-tree drivers select it automatically.
+
config SND_SOC_IMX_PCM_DMA
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 8c5fa8a859c0..b63802f345cc 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -27,6 +27,7 @@ snd-soc-fsl-mqs-objs := fsl_mqs.o
snd-soc-fsl-easrc-objs := fsl_easrc.o
snd-soc-fsl-xcvr-objs := fsl_xcvr.o
snd-soc-fsl-aud2htx-objs := fsl_aud2htx.o
+snd-soc-fsl-rpmsg-objs := fsl_rpmsg.o
obj-$(CONFIG_SND_SOC_FSL_AUDMIX) += snd-soc-fsl-audmix.o
obj-$(CONFIG_SND_SOC_FSL_ASOC_CARD) += snd-soc-fsl-asoc-card.o
@@ -42,6 +43,7 @@ obj-$(CONFIG_SND_SOC_FSL_EASRC) += snd-soc-fsl-easrc.o
obj-$(CONFIG_SND_SOC_POWERPC_DMA) += snd-soc-fsl-dma.o
obj-$(CONFIG_SND_SOC_FSL_XCVR) += snd-soc-fsl-xcvr.o
obj-$(CONFIG_SND_SOC_FSL_AUD2HTX) += snd-soc-fsl-aud2htx.o
+obj-$(CONFIG_SND_SOC_FSL_RPMSG) += snd-soc-fsl-rpmsg.o
# MPC5200 Platform Support
obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o
diff --git a/sound/soc/fsl/fsl_rpmsg.c b/sound/soc/fsl/fsl_rpmsg.c
new file mode 100644
index 000000000000..2d09d8850e2c
--- /dev/null
+++ b/sound/soc/fsl/fsl_rpmsg.c
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2018-2021 NXP
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/pm_runtime.h>
+#include <linux/rpmsg.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_rpmsg.h"
+#include "imx-pcm.h"
+
+#define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \
+ SNDRV_PCM_RATE_16000 | \
+ SNDRV_PCM_RATE_48000)
+#define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE
+
+/* 192kHz/32bit/2ch/60s size is 0x574e00 */
+#define LPA_LARGE_BUFFER_SIZE (0x6000000)
+
+static const unsigned int fsl_rpmsg_rates[] = {
+ 8000, 11025, 16000, 22050, 44100,
+ 32000, 48000, 96000, 88200, 176400, 192000,
+ 352800, 384000, 705600, 768000, 1411200, 2822400,
+};
+
+static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
+ .count = ARRAY_SIZE(fsl_rpmsg_rates),
+ .list = fsl_rpmsg_rates,
+};
+
+static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
+ struct clk *p = rpmsg->mclk, *pll = 0, *npll = 0;
+ u64 rate = params_rate(params);
+ int ret = 0;
+
+ /* Get current pll parent */
+ while (p && rpmsg->pll8k && rpmsg->pll11k) {
+ struct clk *pp = clk_get_parent(p);
+
+ if (clk_is_match(pp, rpmsg->pll8k) ||
+ clk_is_match(pp, rpmsg->pll11k)) {
+ pll = pp;
+ break;
+ }
+ p = pp;
+ }
+
+ /* Switch to another pll parent if needed. */
+ if (pll) {
+ npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
+ if (!clk_is_match(pll, npll)) {
+ ret = clk_set_parent(p, npll);
+ if (ret < 0)
+ dev_warn(dai->dev, "failed to set parent %s: %d\n",
+ __clk_get_name(npll), ret);
+ }
+ }
+
+ if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
+ ret = clk_prepare_enable(rpmsg->mclk);
+ if (ret) {
+ dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
+ return ret;
+ }
+
+ rpmsg->mclk_streams |= BIT(substream->stream);
+ }
+
+ return ret;
+}
+
+static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
+
+ if (rpmsg->mclk_streams & BIT(substream->stream)) {
+ clk_disable_unprepare(rpmsg->mclk);
+ rpmsg->mclk_streams &= ~BIT(substream->stream);
+ }
+
+ return 0;
+}
+
+static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ int ret;
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &fsl_rpmsg_rate_constraints);
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
+ .startup = fsl_rpmsg_startup,
+ .hw_params = fsl_rpmsg_hw_params,
+ .hw_free = fsl_rpmsg_hw_free,
+};
+
+static struct snd_soc_dai_driver fsl_rpmsg_dai = {
+ .playback = {
+ .stream_name = "CPU-Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = FSL_RPMSG_FORMATS,
+ },
+ .capture = {
+ .stream_name = "CPU-Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = FSL_RPMSG_FORMATS,
+ },
+ .symmetric_rate = 1,
+ .symmetric_channels = 1,
+ .symmetric_sample_bits = 1,
+ .ops = &fsl_rpmsg_dai_ops,
+};
+
+static const struct snd_soc_component_driver fsl_component = {
+ .name = "fsl-rpmsg",
+};
+
+static const struct of_device_id fsl_rpmsg_ids[] = {
+ { .compatible = "fsl,imx7ulp-rpmsg-audio"},
+ { .compatible = "fsl,imx8mm-rpmsg-audio"},
+ { .compatible = "fsl,imx8mn-rpmsg-audio"},
+ { .compatible = "fsl,imx8mp-rpmsg-audio"},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
+
+static int fsl_rpmsg_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_rpmsg *rpmsg;
+ int ret;
+
+ rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
+ if (!rpmsg)
+ return -ENOMEM;
+
+ if (of_property_read_bool(np, "fsl,enable-lpa")) {
+ rpmsg->enable_lpa = 1;
+ rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
+ } else {
+ rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
+ }
+
+ /* Get the optional clocks */
+ rpmsg->ipg = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(rpmsg->ipg))
+ rpmsg->ipg = NULL;
+
+ rpmsg->mclk = devm_clk_get(&pdev->dev, "mclk");
+ if (IS_ERR(rpmsg->mclk))
+ rpmsg->mclk = NULL;
+
+ rpmsg->dma = devm_clk_get(&pdev->dev, "dma");
+ if (IS_ERR(rpmsg->dma))
+ rpmsg->dma = NULL;
+
+ rpmsg->pll8k = devm_clk_get(&pdev->dev, "pll8k");
+ if (IS_ERR(rpmsg->pll8k))
+ rpmsg->pll8k = NULL;
+
+ rpmsg->pll11k = devm_clk_get(&pdev->dev, "pll11k");
+ if (IS_ERR(rpmsg->pll11k))
+ rpmsg->pll11k = NULL;
+
+ platform_set_drvdata(pdev, rpmsg);
+ pm_runtime_enable(&pdev->dev);
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
+ &fsl_rpmsg_dai, 1);
+ if (ret)
+ return ret;
+
+ rpmsg->card_pdev = platform_device_register_data(&pdev->dev,
+ "imx-audio-rpmsg",
+ PLATFORM_DEVID_NONE,
+ NULL,
+ 0);
+ if (IS_ERR(rpmsg->card_pdev)) {
+ dev_err(&pdev->dev, "failed to register rpmsg card\n");
+ ret = PTR_ERR(rpmsg->card_pdev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fsl_rpmsg_remove(struct platform_device *pdev)
+{
+ struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
+
+ if (rpmsg->card_pdev)
+ platform_device_unregister(rpmsg->card_pdev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int fsl_rpmsg_runtime_resume(struct device *dev)
+{
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(rpmsg->ipg);
+ if (ret) {
+ dev_err(dev, "failed to enable ipg clock: %d\n", ret);
+ goto ipg_err;
+ }
+
+ ret = clk_prepare_enable(rpmsg->dma);
+ if (ret) {
+ dev_err(dev, "Failed to enable dma clock %d\n", ret);
+ goto dma_err;
+ }
+
+ return 0;
+
+dma_err:
+ clk_disable_unprepare(rpmsg->ipg);
+ipg_err:
+ return ret;
+}
+
+static int fsl_rpmsg_runtime_suspend(struct device *dev)
+{
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(rpmsg->dma);
+ clk_disable_unprepare(rpmsg->ipg);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
+ SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
+ fsl_rpmsg_runtime_resume,
+ NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static struct platform_driver fsl_rpmsg_driver = {
+ .probe = fsl_rpmsg_probe,
+ .remove = fsl_rpmsg_remove,
+ .driver = {
+ .name = "fsl_rpmsg",
+ .pm = &fsl_rpmsg_pm_ops,
+ .of_match_table = fsl_rpmsg_ids,
+ },
+};
+module_platform_driver(fsl_rpmsg_driver);
+
+MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_ALIAS("platform:fsl_rpmsg");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/fsl/fsl_rpmsg.h b/sound/soc/fsl/fsl_rpmsg.h
new file mode 100644
index 000000000000..4f5b49eb18d8
--- /dev/null
+++ b/sound/soc/fsl/fsl_rpmsg.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2017-2021 NXP
+ */
+
+#ifndef __FSL_RPMSG_H
+#define __FSL_RPMSG_H
+
+/*
+ * struct fsl_rpmsg - rpmsg private data
+ *
+ * @ipg: ipg clock for cpu dai (SAI)
+ * @mclk: master clock for cpu dai (SAI)
+ * @dma: clock for dma device
+ * @pll8k: parent clock for multiple of 8kHz frequency
+ * @pll11k: parent clock for multiple of 11kHz frequency
+ * @card_pdev: Platform_device pointer to register a sound card
+ * @mclk_streams: Active streams that are using baudclk
+ * @force_lpa: force enable low power audio routine if condition satisfy
+ * @enable_lpa: enable low power audio routine according to dts setting
+ * @buffer_size: pre allocated dma buffer size
+ */
+struct fsl_rpmsg {
+ struct clk *ipg;
+ struct clk *mclk;
+ struct clk *dma;
+ struct clk *pll8k;
+ struct clk *pll11k;
+ struct platform_device *card_pdev;
+ unsigned int mclk_streams;
+ int force_lpa;
+ int enable_lpa;
+ int buffer_size;
+};
+#endif /* __FSL_RPMSG_H */
--
2.27.0
^ permalink raw reply related
* [PATCH v5 3/6] ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg audio device
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
fsl_rpmsg is a virtual audio device. Mapping to real hardware
devices are SAI, DMA controlled by Cortex M core. What we see from
Linux side is a device which provides audio service by rpmsg channel.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
.../devicetree/bindings/sound/fsl,rpmsg.yaml | 108 ++++++++++++++++++
1 file changed, 108 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
diff --git a/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
new file mode 100644
index 000000000000..b4c190bddd84
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,rpmsg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Audio RPMSG CPU DAI Controller
+
+maintainers:
+ - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+description: |
+ fsl_rpmsg is a virtual audio device. Mapping to real hardware devices
+ are SAI, DMA controlled by Cortex M core. What we see from Linux
+ side is a device which provides audio service by rpmsg channel.
+
+properties:
+ compatible:
+ enum:
+ - fsl,imx7ulp-rpmsg-audio
+ - fsl,imx8mn-rpmsg-audio
+ - fsl,imx8mm-rpmsg-audio
+ - fsl,imx8mp-rpmsg-audio
+
+ model:
+ $ref: /schemas/types.yaml#/definitions/string
+ description: User specified audio sound card name
+
+ clocks:
+ items:
+ - description: Peripheral clock for register access
+ - description: Master clock
+ - description: DMA clock for DMA register access
+ - description: Parent clock for multiple of 8kHz sample rates
+ - description: Parent clock for multiple of 11kHz sample rates
+
+ clock-names:
+ items:
+ - const: ipg
+ - const: mclk
+ - const: dma
+ - const: pll8k
+ - const: pll11k
+
+ power-domains:
+ description:
+ List of phandle and PM domain specifier as documented in
+ Documentation/devicetree/bindings/power/power_domain.txt
+ maxItems: 1
+
+ memory-region:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ phandle to a node describing reserved memory (System RAM memory)
+ The M core can't access all the DDR memory space on some platform,
+ So reserved a specific memory for dma buffer which M core can
+ access.
+ (see bindings/reserved-memory/reserved-memory.txt)
+
+ audio-codec:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description: The phandle to a node of audio codec
+
+ audio-routing:
+ $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+ description: |
+ A list of the connections between audio components. Each entry is a
+ pair of strings, the first being the connection's sink, the second
+ being the connection's source.
+
+ fsl,enable-lpa:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description: enable low power audio path.
+
+ fsl,rpmsg-out:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description: |
+ This is a boolean property. If present, the transmitting function
+ will be enabled.
+
+ fsl,rpmsg-in:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description: |
+ This is a boolean property. If present, the receiving function
+ will be enabled.
+
+required:
+ - compatible
+ - model
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/imx8mn-clock.h>
+
+ rpmsg_audio: rpmsg_audio {
+ compatible = "fsl,imx8mn-rpmsg-audio";
+ model = "wm8524-audio";
+ fsl,enable-lpa;
+ fsl,rpmsg-out;
+ clocks = <&clk IMX8MN_CLK_SAI3_IPG>,
+ <&clk IMX8MN_CLK_SAI3_ROOT>,
+ <&clk IMX8MN_CLK_SDMA3_ROOT>,
+ <&clk IMX8MN_AUDIO_PLL1_OUT>,
+ <&clk IMX8MN_AUDIO_PLL2_OUT>;
+ clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k";
+ };
--
2.27.0
^ permalink raw reply related
* [PATCH v5 4/6] ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
This driver is used to accept the message from rpmsg audio
channel, and if this driver is probed, it will help to register
the platform driver, the platform driver will use this
audio channel to send and receive messages to and from Cortex-M
core.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
sound/soc/fsl/Kconfig | 4 +
sound/soc/fsl/Makefile | 1 +
sound/soc/fsl/imx-audio-rpmsg.c | 140 ++++++++++++++++++++++++++++++++
3 files changed, 145 insertions(+)
create mode 100644 sound/soc/fsl/imx-audio-rpmsg.c
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 3326f30e28f6..8dbdc0c5ba58 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -129,6 +129,10 @@ config SND_SOC_IMX_PCM_DMA
tristate
select SND_SOC_GENERIC_DMAENGINE_PCM
+config SND_SOC_IMX_AUDIO_RPMSG
+ tristate
+ depends on RPMSG
+
config SND_SOC_IMX_AUDMUX
tristate "Digital Audio Mux module support"
help
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index b63802f345cc..f08f3cd07ff5 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_SND_SOC_IMX_AUDMUX) += snd-soc-imx-audmux.o
obj-$(CONFIG_SND_SOC_IMX_PCM_FIQ) += imx-pcm-fiq.o
obj-$(CONFIG_SND_SOC_IMX_PCM_DMA) += imx-pcm-dma.o
+obj-$(CONFIG_SND_SOC_IMX_AUDIO_RPMSG) += imx-audio-rpmsg.o
# i.MX Machine Support
snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o
diff --git a/sound/soc/fsl/imx-audio-rpmsg.c b/sound/soc/fsl/imx-audio-rpmsg.c
new file mode 100644
index 000000000000..50099bcaa9cd
--- /dev/null
+++ b/sound/soc/fsl/imx-audio-rpmsg.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2017-2020 NXP
+
+#include <linux/module.h>
+#include <linux/rpmsg.h>
+#include "imx-pcm-rpmsg.h"
+
+/*
+ * struct imx_audio_rpmsg: private data
+ *
+ * @rpmsg_pdev: pointer of platform device
+ */
+struct imx_audio_rpmsg {
+ struct platform_device *rpmsg_pdev;
+};
+
+static int imx_audio_rpmsg_cb(struct rpmsg_device *rpdev, void *data, int len,
+ void *priv, u32 src)
+{
+ struct imx_audio_rpmsg *rpmsg = dev_get_drvdata(&rpdev->dev);
+ struct rpmsg_r_msg *r_msg = (struct rpmsg_r_msg *)data;
+ struct rpmsg_info *info;
+ struct rpmsg_msg *msg;
+ unsigned long flags;
+
+ if (!rpmsg->rpmsg_pdev)
+ return 0;
+
+ info = platform_get_drvdata(rpmsg->rpmsg_pdev);
+
+ dev_dbg(&rpdev->dev, "get from%d: cmd:%d. %d\n",
+ src, r_msg->header.cmd, r_msg->param.resp);
+
+ switch (r_msg->header.type) {
+ case MSG_TYPE_C:
+ /* TYPE C is notification from M core */
+ switch (r_msg->header.cmd) {
+ case TX_PERIOD_DONE:
+ spin_lock_irqsave(&info->lock[TX], flags);
+ msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->r_msg.param.buffer_tail =
+ r_msg->param.buffer_tail;
+ msg->r_msg.param.buffer_tail %= info->num_period[TX];
+ spin_unlock_irqrestore(&info->lock[TX], flags);
+ info->callback[TX](info->callback_param[TX]);
+ break;
+ case RX_PERIOD_DONE:
+ spin_lock_irqsave(&info->lock[RX], flags);
+ msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->r_msg.param.buffer_tail =
+ r_msg->param.buffer_tail;
+ msg->r_msg.param.buffer_tail %= info->num_period[1];
+ spin_unlock_irqrestore(&info->lock[RX], flags);
+ info->callback[RX](info->callback_param[RX]);
+ break;
+ default:
+ dev_warn(&rpdev->dev, "unknown msg command\n");
+ break;
+ }
+ break;
+ case MSG_TYPE_B:
+ /* TYPE B is response msg */
+ memcpy(&info->r_msg, r_msg, sizeof(struct rpmsg_r_msg));
+ complete(&info->cmd_complete);
+ break;
+ default:
+ dev_warn(&rpdev->dev, "unknown msg type\n");
+ break;
+ }
+
+ return 0;
+}
+
+static int imx_audio_rpmsg_probe(struct rpmsg_device *rpdev)
+{
+ struct imx_audio_rpmsg *data;
+ int ret = 0;
+
+ dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
+ rpdev->src, rpdev->dst);
+
+ data = devm_kzalloc(&rpdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ dev_set_drvdata(&rpdev->dev, data);
+
+ /* Register platform driver for rpmsg routine */
+ data->rpmsg_pdev = platform_device_register_data(&rpdev->dev,
+ IMX_PCM_DRV_NAME,
+ PLATFORM_DEVID_NONE,
+ NULL, 0);
+ if (IS_ERR(data->rpmsg_pdev)) {
+ dev_err(&rpdev->dev, "failed to register rpmsg platform.\n");
+ ret = PTR_ERR(data->rpmsg_pdev);
+ }
+
+ return ret;
+}
+
+static void imx_audio_rpmsg_remove(struct rpmsg_device *rpdev)
+{
+ struct imx_audio_rpmsg *data = dev_get_drvdata(&rpdev->dev);
+
+ if (data->rpmsg_pdev)
+ platform_device_unregister(data->rpmsg_pdev);
+
+ dev_info(&rpdev->dev, "audio rpmsg driver is removed\n");
+}
+
+static struct rpmsg_device_id imx_audio_rpmsg_id_table[] = {
+ { .name = "rpmsg-audio-channel" },
+ { },
+};
+
+static struct rpmsg_driver imx_audio_rpmsg_driver = {
+ .drv.name = "imx_audio_rpmsg",
+ .drv.owner = THIS_MODULE,
+ .id_table = imx_audio_rpmsg_id_table,
+ .probe = imx_audio_rpmsg_probe,
+ .callback = imx_audio_rpmsg_cb,
+ .remove = imx_audio_rpmsg_remove,
+};
+
+static int __init imx_audio_rpmsg_init(void)
+{
+ return register_rpmsg_driver(&imx_audio_rpmsg_driver);
+}
+
+static void __exit imx_audio_rpmsg_exit(void)
+{
+ unregister_rpmsg_driver(&imx_audio_rpmsg_driver);
+}
+module_init(imx_audio_rpmsg_init);
+module_exit(imx_audio_rpmsg_exit);
+
+MODULE_DESCRIPTION("Freescale SoC Audio RPMSG interface");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_ALIAS("platform:imx_audio_rpmsg");
+MODULE_LICENSE("GPL v2");
--
2.27.0
^ permalink raw reply related
* [PATCH v5 6/6] ASoC: imx-rpmsg: Add machine driver for audio base on rpmsg
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
The platform device is not registered by device tree or
cpu dai driver, it is registered by the rpmsg channel,
So add a dedicated machine driver to handle this case.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
sound/soc/fsl/Kconfig | 11 +++
sound/soc/fsl/Makefile | 2 +
sound/soc/fsl/imx-rpmsg.c | 150 ++++++++++++++++++++++++++++++++++++++
3 files changed, 163 insertions(+)
create mode 100644 sound/soc/fsl/imx-rpmsg.c
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 3d3d14f3793e..c71c6024320b 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -337,6 +337,17 @@ config SND_SOC_IMX_HDMI
Say Y if you want to add support for SoC audio on an i.MX board with
IMX HDMI.
+config SND_SOC_IMX_RPMSG
+ tristate "SoC Audio support for i.MX boards with rpmsg"
+ depends on RPMSG
+ select SND_SOC_IMX_PCM_RPMSG
+ select SND_SOC_IMX_AUDIO_RPMSG
+ help
+ SoC Audio support for i.MX boards with rpmsg.
+ There should be rpmsg devices defined in other core (M core)
+ Say Y if you want to add support for SoC audio on an i.MX board with
+ a rpmsg devices.
+
endif # SND_IMX_SOC
endmenu
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index ce4f4324c3a2..f146ce464acd 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -70,6 +70,7 @@ snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
snd-soc-imx-spdif-objs := imx-spdif.o
snd-soc-imx-audmix-objs := imx-audmix.o
snd-soc-imx-hdmi-objs := imx-hdmi.o
+snd-soc-imx-rpmsg-objs := imx-rpmsg.o
obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
obj-$(CONFIG_SND_SOC_IMX_ES8328) += snd-soc-imx-es8328.o
@@ -77,3 +78,4 @@ obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
obj-$(CONFIG_SND_SOC_IMX_AUDMIX) += snd-soc-imx-audmix.o
obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
+obj-$(CONFIG_SND_SOC_IMX_RPMSG) += snd-soc-imx-rpmsg.o
diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c
new file mode 100644
index 000000000000..5a9a470d203f
--- /dev/null
+++ b/sound/soc/fsl/imx-rpmsg.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2017-2020 NXP
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include "imx-pcm-rpmsg.h"
+
+struct imx_rpmsg {
+ struct snd_soc_dai_link dai;
+ struct snd_soc_card card;
+};
+
+static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+ SND_SOC_DAPM_MIC("Mic Jack", NULL),
+ SND_SOC_DAPM_MIC("Main MIC", NULL),
+};
+
+static int imx_rpmsg_probe(struct platform_device *pdev)
+{
+ struct snd_soc_dai_link_component *dlc;
+ struct device *dev = pdev->dev.parent;
+ /* rpmsg_pdev is the platform device for the rpmsg node that probed us */
+ struct platform_device *rpmsg_pdev = to_platform_device(dev);
+ struct device_node *np = rpmsg_pdev->dev.of_node;
+ struct of_phandle_args args;
+ struct imx_rpmsg *data;
+ int ret = 0;
+
+ dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
+ if (!dlc)
+ return -ENOMEM;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);
+ if (ret)
+ dev_warn(&pdev->dev, "no reserved DMA memory\n");
+
+ data->dai.cpus = &dlc[0];
+ data->dai.num_cpus = 1;
+ data->dai.platforms = &dlc[1];
+ data->dai.num_platforms = 1;
+ data->dai.codecs = &dlc[2];
+ data->dai.num_codecs = 1;
+
+ data->dai.name = "rpmsg hifi";
+ data->dai.stream_name = "rpmsg hifi";
+ data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS;
+
+ /* Optional codec node */
+ ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);
+ if (ret) {
+ data->dai.codecs->dai_name = "snd-soc-dummy-dai";
+ data->dai.codecs->name = "snd-soc-dummy";
+ } else {
+ data->dai.codecs->of_node = args.np;
+ ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to get codec_dai_name\n");
+ goto fail;
+ }
+ }
+
+ data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);
+ data->dai.platforms->name = IMX_PCM_DRV_NAME;
+ data->dai.playback_only = true;
+ data->dai.capture_only = true;
+ data->card.num_links = 1;
+ data->card.dai_link = &data->dai;
+
+ if (of_property_read_bool(np, "fsl,rpmsg-out"))
+ data->dai.capture_only = false;
+
+ if (of_property_read_bool(np, "fsl,rpmsg-in"))
+ data->dai.playback_only = false;
+
+ if (data->dai.playback_only && data->dai.capture_only) {
+ dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ data->card.dev = &pdev->dev;
+ data->card.owner = THIS_MODULE;
+ data->card.dapm_widgets = imx_rpmsg_dapm_widgets;
+ data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);
+ /*
+ * Inoder to use common api to get card name and audio routing.
+ * Use parent of_node for this device, revert it after finishing using
+ */
+ data->card.dev->of_node = np;
+
+ ret = snd_soc_of_parse_card_name(&data->card, "model");
+ if (ret)
+ goto fail;
+
+ if (of_property_read_bool(np, "audio-routing")) {
+ ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
+ if (ret) {
+ dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
+ goto fail;
+ }
+ }
+
+ platform_set_drvdata(pdev, &data->card);
+ snd_soc_card_set_drvdata(&data->card, data);
+ ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto fail;
+ }
+
+fail:
+ pdev->dev.of_node = NULL;
+ return ret;
+}
+
+static struct platform_driver imx_rpmsg_driver = {
+ .driver = {
+ .name = "imx-audio-rpmsg",
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ },
+ .probe = imx_rpmsg_probe,
+};
+module_platform_driver(imx_rpmsg_driver);
+
+MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_ALIAS("platform:imx-audio-rpmsg");
+MODULE_LICENSE("GPL v2");
--
2.27.0
^ permalink raw reply related
* [PATCH v5 5/6] ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsg
From: Shengjiu Wang @ 2021-03-12 2:38 UTC (permalink / raw)
To: lgirdwood, broonie, perex, tiwai, alsa-devel, linux-kernel, timur,
nicoleotsuka, Xiubo.Lee, festevam, linuxppc-dev, robh+dt,
devicetree
In-Reply-To: <1615516725-4975-1-git-send-email-shengjiu.wang@nxp.com>
Platform driver based on rpmsg is the interface for sending and
receiving rpmsg to and from M core. It will tell the Cortex-M core
sound format/rate/channel, where is the data buffer, where is
the period size, when to start, when to stop and when suspend
or resume happen, each this behavior there is defined rpmsg
command.
Especially we designed the low power audio case, that is to
allocate a large buffer and fill the data, then Cortex-A core can go
to sleep mode, Cortex-M core continue to play the sound, when the
buffer is consumed, Cortex-M core will trigger the Cortex-A core to
wake up.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
sound/soc/fsl/Kconfig | 5 +
sound/soc/fsl/Makefile | 1 +
sound/soc/fsl/imx-pcm-rpmsg.c | 918 ++++++++++++++++++++++++++++++++++
sound/soc/fsl/imx-pcm-rpmsg.h | 512 +++++++++++++++++++
4 files changed, 1436 insertions(+)
create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.c
create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 8dbdc0c5ba58..3d3d14f3793e 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -133,6 +133,11 @@ config SND_SOC_IMX_AUDIO_RPMSG
tristate
depends on RPMSG
+config SND_SOC_IMX_PCM_RPMSG
+ tristate
+ depends on SND_SOC_IMX_AUDIO_RPMSG
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+
config SND_SOC_IMX_AUDMUX
tristate "Digital Audio Mux module support"
help
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index f08f3cd07ff5..ce4f4324c3a2 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_SND_SOC_IMX_AUDMUX) += snd-soc-imx-audmux.o
obj-$(CONFIG_SND_SOC_IMX_PCM_FIQ) += imx-pcm-fiq.o
obj-$(CONFIG_SND_SOC_IMX_PCM_DMA) += imx-pcm-dma.o
obj-$(CONFIG_SND_SOC_IMX_AUDIO_RPMSG) += imx-audio-rpmsg.o
+obj-$(CONFIG_SND_SOC_IMX_PCM_RPMSG) += imx-pcm-rpmsg.o
# i.MX Machine Support
snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o
diff --git a/sound/soc/fsl/imx-pcm-rpmsg.c b/sound/soc/fsl/imx-pcm-rpmsg.c
new file mode 100644
index 000000000000..875c0d6df339
--- /dev/null
+++ b/sound/soc/fsl/imx-pcm-rpmsg.c
@@ -0,0 +1,918 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright 2017-2021 NXP
+
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/rpmsg.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/soc.h>
+
+#include "imx-pcm.h"
+#include "fsl_rpmsg.h"
+#include "imx-pcm-rpmsg.h"
+
+static struct snd_pcm_hardware imx_rpmsg_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE,
+ .period_bytes_min = 512,
+ .period_bytes_max = 65536,
+ .periods_min = 2,
+ .periods_max = 6000,
+ .fifo_size = 0,
+};
+
+static int imx_rpmsg_pcm_send_message(struct rpmsg_msg *msg,
+ struct rpmsg_info *info)
+{
+ struct rpmsg_device *rpdev = info->rpdev;
+ int ret = 0;
+
+ mutex_lock(&info->msg_lock);
+ if (!rpdev) {
+ dev_err(info->dev, "rpmsg channel not ready\n");
+ mutex_unlock(&info->msg_lock);
+ return -EINVAL;
+ }
+
+ dev_dbg(&rpdev->dev, "send cmd %d\n", msg->s_msg.header.cmd);
+
+ if (!(msg->s_msg.header.type == MSG_TYPE_C))
+ reinit_completion(&info->cmd_complete);
+
+ ret = rpmsg_send(rpdev->ept, (void *)&msg->s_msg,
+ sizeof(struct rpmsg_s_msg));
+ if (ret) {
+ dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
+ mutex_unlock(&info->msg_lock);
+ return ret;
+ }
+
+ /* No receive msg for TYPE_C command */
+ if (msg->s_msg.header.type == MSG_TYPE_C) {
+ mutex_unlock(&info->msg_lock);
+ return 0;
+ }
+
+ /* wait response from rpmsg */
+ ret = wait_for_completion_timeout(&info->cmd_complete,
+ msecs_to_jiffies(RPMSG_TIMEOUT));
+ if (!ret) {
+ dev_err(&rpdev->dev, "rpmsg_send cmd %d timeout!\n",
+ msg->s_msg.header.cmd);
+ mutex_unlock(&info->msg_lock);
+ return -ETIMEDOUT;
+ }
+
+ memcpy(&msg->r_msg, &info->r_msg, sizeof(struct rpmsg_r_msg));
+ memcpy(&info->msg[msg->r_msg.header.cmd].r_msg,
+ &msg->r_msg, sizeof(struct rpmsg_r_msg));
+
+ /*
+ * Reset the buffer pointer to be zero, actully we have
+ * set the buffer pointer to be zero in imx_rpmsg_terminate_all
+ * But if there is timer task queued in queue, after it is
+ * executed the buffer pointer will be changed, so need to
+ * reset it again with TERMINATE command.
+ */
+ switch (msg->s_msg.header.cmd) {
+ case TX_TERMINATE:
+ info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
+ break;
+ case RX_TERMINATE:
+ info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
+ break;
+ default:
+ break;
+ }
+
+ dev_dbg(&rpdev->dev, "cmd:%d, resp %d\n", msg->s_msg.header.cmd,
+ info->r_msg.param.resp);
+
+ mutex_unlock(&info->msg_lock);
+
+ return 0;
+}
+
+static int imx_rpmsg_insert_workqueue(struct snd_pcm_substream *substream,
+ struct rpmsg_msg *msg,
+ struct rpmsg_info *info)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ /*
+ * Queue the work to workqueue.
+ * If the queue is full, drop the message.
+ */
+ spin_lock_irqsave(&info->wq_lock, flags);
+ if (info->work_write_index != info->work_read_index) {
+ int index = info->work_write_index;
+
+ memcpy(&info->work_list[index].msg, msg,
+ sizeof(struct rpmsg_s_msg));
+
+ queue_work(info->rpmsg_wq, &info->work_list[index].work);
+ info->work_write_index++;
+ info->work_write_index %= WORK_MAX_NUM;
+ } else {
+ info->msg_drop_count[substream->stream]++;
+ ret = -EPIPE;
+ }
+ spin_unlock_irqrestore(&info->wq_lock, flags);
+
+ return ret;
+}
+
+static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct rpmsg_msg *msg;
+ int ret = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_HW_PARAM];
+ msg->s_msg.header.cmd = TX_HW_PARAM;
+ } else {
+ msg = &info->msg[RX_HW_PARAM];
+ msg->s_msg.header.cmd = RX_HW_PARAM;
+ }
+
+ msg->s_msg.param.rate = params_rate(params);
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ msg->s_msg.param.format = RPMSG_S16_LE;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ msg->s_msg.param.format = RPMSG_S24_LE;
+ break;
+ case SNDRV_PCM_FORMAT_DSD_U16_LE:
+ msg->s_msg.param.format = SNDRV_PCM_FORMAT_DSD_U16_LE;
+ break;
+ case SNDRV_PCM_FORMAT_DSD_U32_LE:
+ msg->s_msg.param.format = SNDRV_PCM_FORMAT_DSD_U32_LE;
+ break;
+ default:
+ msg->s_msg.param.format = RPMSG_S32_LE;
+ break;
+ }
+
+ switch (params_channels(params)) {
+ case 1:
+ msg->s_msg.param.channels = RPMSG_CH_LEFT;
+ break;
+ case 2:
+ msg->s_msg.param.channels = RPMSG_CH_STEREO;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+ runtime->dma_bytes = params_buffer_bytes(params);
+
+ info->send_message(msg, info);
+
+ return ret;
+}
+
+static int imx_rpmsg_pcm_hw_free(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ snd_pcm_set_runtime_buffer(substream, NULL);
+ return 0;
+}
+
+static snd_pcm_uframes_t imx_rpmsg_pcm_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+ unsigned int pos = 0;
+ int buffer_tail = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ else
+ msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
+
+ buffer_tail = msg->r_msg.param.buffer_tail;
+ pos = buffer_tail * snd_pcm_lib_period_bytes(substream);
+
+ return bytes_to_frames(substream->runtime, pos);
+}
+
+static void imx_rpmsg_timer_callback(struct timer_list *t)
+{
+ struct stream_timer *stream_timer =
+ from_timer(stream_timer, t, timer);
+ struct snd_pcm_substream *substream = stream_timer->substream;
+ struct rpmsg_info *info = stream_timer->info;
+ struct rpmsg_msg *msg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->s_msg.header.cmd = TX_PERIOD_DONE;
+ } else {
+ msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->s_msg.header.cmd = RX_PERIOD_DONE;
+ }
+
+ imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_pcm_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+ int ret = 0;
+ int cmd;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_OPEN];
+ msg->s_msg.header.cmd = TX_OPEN;
+
+ /* reinitialize buffer counter*/
+ cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
+ info->msg[cmd].s_msg.param.buffer_tail = 0;
+ info->msg[cmd].r_msg.param.buffer_tail = 0;
+ info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
+
+ } else {
+ msg = &info->msg[RX_OPEN];
+ msg->s_msg.header.cmd = RX_OPEN;
+
+ /* reinitialize buffer counter*/
+ cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
+ info->msg[cmd].s_msg.param.buffer_tail = 0;
+ info->msg[cmd].r_msg.param.buffer_tail = 0;
+ info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
+ }
+
+ info->send_message(msg, info);
+
+ imx_rpmsg_pcm_hardware.period_bytes_max =
+ imx_rpmsg_pcm_hardware.buffer_bytes_max / 2;
+
+ snd_soc_set_runtime_hwparams(substream, &imx_rpmsg_pcm_hardware);
+
+ ret = snd_pcm_hw_constraint_integer(substream->runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ return ret;
+
+ info->msg_drop_count[substream->stream] = 0;
+
+ /* Create timer*/
+ info->stream_timer[substream->stream].info = info;
+ info->stream_timer[substream->stream].substream = substream;
+ timer_setup(&info->stream_timer[substream->stream].timer,
+ imx_rpmsg_timer_callback, 0);
+ return ret;
+}
+
+static int imx_rpmsg_pcm_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+ int ret = 0;
+
+ /* Flush work in workqueue to make TX_CLOSE is the last message */
+ flush_workqueue(info->rpmsg_wq);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_CLOSE];
+ msg->s_msg.header.cmd = TX_CLOSE;
+ } else {
+ msg = &info->msg[RX_CLOSE];
+ msg->s_msg.header.cmd = RX_CLOSE;
+ }
+
+ info->send_message(msg, info);
+
+ del_timer(&info->stream_timer[substream->stream].timer);
+
+ rtd->dai_link->ignore_suspend = 0;
+
+ if (info->msg_drop_count[substream->stream])
+ dev_warn(rtd->dev, "Msg is dropped!, number is %d\n",
+ info->msg_drop_count[substream->stream]);
+
+ return ret;
+}
+
+static int imx_rpmsg_pcm_prepare(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
+
+ /*
+ * NON-MMAP mode, NONBLOCK, Version 2, enable lpa in dts
+ * four conditions to determine the lpa is enabled.
+ */
+ if ((runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
+ runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) &&
+ rpmsg->enable_lpa) {
+ /*
+ * Ignore suspend operation in low power mode
+ * M core will continue playback music on A core suspend.
+ */
+ rtd->dai_link->ignore_suspend = 1;
+ rpmsg->force_lpa = 1;
+ } else {
+ rpmsg->force_lpa = 0;
+ }
+
+ return 0;
+}
+
+static int imx_rpmsg_pcm_mmap(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ return dma_mmap_wc(substream->pcm->card->dev, vma,
+ runtime->dma_area,
+ runtime->dma_addr,
+ runtime->dma_bytes);
+}
+
+static void imx_rpmsg_pcm_dma_complete(void *arg)
+{
+ struct snd_pcm_substream *substream = arg;
+
+ snd_pcm_period_elapsed(substream);
+}
+
+static int imx_rpmsg_prepare_and_submit(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_BUFFER];
+ msg->s_msg.header.cmd = TX_BUFFER;
+ } else {
+ msg = &info->msg[RX_BUFFER];
+ msg->s_msg.header.cmd = RX_BUFFER;
+ }
+
+ /* Send buffer address and buffer size */
+ msg->s_msg.param.buffer_addr = substream->runtime->dma_addr;
+ msg->s_msg.param.buffer_size = snd_pcm_lib_buffer_bytes(substream);
+ msg->s_msg.param.period_size = snd_pcm_lib_period_bytes(substream);
+ msg->s_msg.param.buffer_tail = 0;
+
+ info->num_period[substream->stream] = msg->s_msg.param.buffer_size /
+ msg->s_msg.param.period_size;
+
+ info->callback[substream->stream] = imx_rpmsg_pcm_dma_complete;
+ info->callback_param[substream->stream] = substream;
+
+ return imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_async_issue_pending(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_START];
+ msg->s_msg.header.cmd = TX_START;
+ } else {
+ msg = &info->msg[RX_START];
+ msg->s_msg.header.cmd = RX_START;
+ }
+
+ return imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_restart(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_RESTART];
+ msg->s_msg.header.cmd = TX_RESTART;
+ } else {
+ msg = &info->msg[RX_RESTART];
+ msg->s_msg.header.cmd = RX_RESTART;
+ }
+
+ return imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_pause(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_PAUSE];
+ msg->s_msg.header.cmd = TX_PAUSE;
+ } else {
+ msg = &info->msg[RX_PAUSE];
+ msg->s_msg.header.cmd = RX_PAUSE;
+ }
+
+ return imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_terminate_all(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ struct rpmsg_msg *msg;
+ int cmd;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_TERMINATE];
+ msg->s_msg.header.cmd = TX_TERMINATE;
+ /* Clear buffer count*/
+ cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
+ info->msg[cmd].s_msg.param.buffer_tail = 0;
+ info->msg[cmd].r_msg.param.buffer_tail = 0;
+ info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
+ } else {
+ msg = &info->msg[RX_TERMINATE];
+ msg->s_msg.header.cmd = RX_TERMINATE;
+ /* Clear buffer count*/
+ cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
+ info->msg[cmd].s_msg.param.buffer_tail = 0;
+ info->msg[cmd].r_msg.param.buffer_tail = 0;
+ info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
+ }
+
+ del_timer(&info->stream_timer[substream->stream].timer);
+
+ return imx_rpmsg_insert_workqueue(substream, msg, info);
+}
+
+static int imx_rpmsg_pcm_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ret = imx_rpmsg_prepare_and_submit(component, substream);
+ if (ret)
+ return ret;
+ ret = imx_rpmsg_async_issue_pending(component, substream);
+ break;
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if (rpmsg->force_lpa)
+ break;
+ fallthrough;
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ ret = imx_rpmsg_restart(component, substream);
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (!rpmsg->force_lpa) {
+ if (runtime->info & SNDRV_PCM_INFO_PAUSE)
+ ret = imx_rpmsg_pause(component, substream);
+ else
+ ret = imx_rpmsg_terminate_all(component, substream);
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ ret = imx_rpmsg_pause(component, substream);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ ret = imx_rpmsg_terminate_all(component, substream);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * imx_rpmsg_pcm_ack
+ *
+ * Send the period index to M core through rpmsg, but not send
+ * all the period index to M core, reduce some unnessesary msg
+ * to reduce the pressure of rpmsg bandwidth.
+ */
+static int imx_rpmsg_pcm_ack(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
+ struct rpmsg_info *info = dev_get_drvdata(component->dev);
+ snd_pcm_uframes_t period_size = runtime->period_size;
+ snd_pcm_sframes_t avail;
+ struct timer_list *timer;
+ struct rpmsg_msg *msg;
+ unsigned long flags;
+ int buffer_tail = 0;
+ int written_num = 0;
+
+ if (!rpmsg->force_lpa)
+ return 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->s_msg.header.cmd = TX_PERIOD_DONE;
+ } else {
+ msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
+ msg->s_msg.header.cmd = RX_PERIOD_DONE;
+ }
+
+ msg->s_msg.header.type = MSG_TYPE_C;
+
+ buffer_tail = (frames_to_bytes(runtime, runtime->control->appl_ptr) %
+ snd_pcm_lib_buffer_bytes(substream));
+ buffer_tail = buffer_tail / snd_pcm_lib_period_bytes(substream);
+
+ /* There is update for period index */
+ if (buffer_tail != msg->s_msg.param.buffer_tail) {
+ written_num = buffer_tail - msg->s_msg.param.buffer_tail;
+ if (written_num < 0)
+ written_num += runtime->periods;
+
+ msg->s_msg.param.buffer_tail = buffer_tail;
+
+ /* The notification message is updated to latest */
+ spin_lock_irqsave(&info->lock[substream->stream], flags);
+ memcpy(&info->notify[substream->stream], msg,
+ sizeof(struct rpmsg_s_msg));
+ info->notify_updated[substream->stream] = true;
+ spin_unlock_irqrestore(&info->lock[substream->stream], flags);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ avail = snd_pcm_playback_hw_avail(runtime);
+ else
+ avail = snd_pcm_capture_hw_avail(runtime);
+
+ timer = &info->stream_timer[substream->stream].timer;
+ /*
+ * If the data in the buffer is less than one period before
+ * this fill, which means the data may not enough on M
+ * core side, we need to send message immediately to let
+ * M core know the pointer is updated.
+ * if there is more than one period data in the buffer before
+ * this fill, which means the data is enough on M core side,
+ * we can delay one period (using timer) to send the message
+ * for reduce the message number in workqueue, because the
+ * pointer may be updated by ack function later, we can
+ * send latest pointer to M core side.
+ */
+ if ((avail - written_num * period_size) <= period_size) {
+ imx_rpmsg_insert_workqueue(substream, msg, info);
+ } else if (rpmsg->force_lpa && !timer_pending(timer)) {
+ int time_msec;
+
+ time_msec = (int)(runtime->period_size * 1000 / runtime->rate);
+ mod_timer(timer, jiffies + msecs_to_jiffies(time_msec));
+ }
+ }
+
+ return 0;
+}
+
+static int imx_rpmsg_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
+ int stream, int size)
+{
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = pcm->card->dev;
+ buf->private_data = NULL;
+ buf->area = dma_alloc_wc(pcm->card->dev, size,
+ &buf->addr, GFP_KERNEL);
+ if (!buf->area)
+ return -ENOMEM;
+
+ buf->bytes = size;
+ return 0;
+}
+
+static void imx_rpmsg_pcm_free_dma_buffers(struct snd_soc_component *component,
+ struct snd_pcm *pcm)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_dma_buffer *buf;
+ int stream;
+
+ for (stream = SNDRV_PCM_STREAM_PLAYBACK;
+ stream < SNDRV_PCM_STREAM_LAST; stream++) {
+ substream = pcm->streams[stream].substream;
+ if (!substream)
+ continue;
+
+ buf = &substream->dma_buffer;
+ if (!buf->area)
+ continue;
+
+ dma_free_wc(pcm->card->dev, buf->bytes,
+ buf->area, buf->addr);
+ buf->area = NULL;
+ }
+}
+
+static int imx_rpmsg_pcm_new(struct snd_soc_component *component,
+ struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_card *card = rtd->card->snd_card;
+ struct snd_pcm *pcm = rtd->pcm;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
+ struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
+ int ret;
+
+ ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+ ret = imx_rpmsg_pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ rpmsg->buffer_size);
+ if (ret)
+ goto out;
+ }
+
+ if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
+ ret = imx_rpmsg_pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ rpmsg->buffer_size);
+ if (ret)
+ goto out;
+ }
+
+ imx_rpmsg_pcm_hardware.buffer_bytes_max = rpmsg->buffer_size;
+out:
+ /* free preallocated buffers in case of error */
+ if (ret)
+ imx_rpmsg_pcm_free_dma_buffers(component, pcm);
+
+ return ret;
+}
+
+static const struct snd_soc_component_driver imx_rpmsg_soc_component = {
+ .name = IMX_PCM_DRV_NAME,
+ .pcm_construct = imx_rpmsg_pcm_new,
+ .pcm_destruct = imx_rpmsg_pcm_free_dma_buffers,
+ .open = imx_rpmsg_pcm_open,
+ .close = imx_rpmsg_pcm_close,
+ .hw_params = imx_rpmsg_pcm_hw_params,
+ .hw_free = imx_rpmsg_pcm_hw_free,
+ .trigger = imx_rpmsg_pcm_trigger,
+ .pointer = imx_rpmsg_pcm_pointer,
+ .mmap = imx_rpmsg_pcm_mmap,
+ .ack = imx_rpmsg_pcm_ack,
+ .prepare = imx_rpmsg_pcm_prepare,
+};
+
+static void imx_rpmsg_pcm_work(struct work_struct *work)
+{
+ struct work_of_rpmsg *work_of_rpmsg;
+ bool is_notification = false;
+ struct rpmsg_info *info;
+ struct rpmsg_msg msg;
+ unsigned long flags;
+
+ work_of_rpmsg = container_of(work, struct work_of_rpmsg, work);
+ info = work_of_rpmsg->info;
+
+ /*
+ * Every work in the work queue, first we check if there
+ * is update for period is filled, because there may be not
+ * enough data in M core side, need to let M core know
+ * data is updated immediately.
+ */
+ spin_lock_irqsave(&info->lock[TX], flags);
+ if (info->notify_updated[TX]) {
+ memcpy(&msg, &info->notify[TX], sizeof(struct rpmsg_s_msg));
+ info->notify_updated[TX] = false;
+ spin_unlock_irqrestore(&info->lock[TX], flags);
+ info->send_message(&msg, info);
+ } else {
+ spin_unlock_irqrestore(&info->lock[TX], flags);
+ }
+
+ spin_lock_irqsave(&info->lock[RX], flags);
+ if (info->notify_updated[RX]) {
+ memcpy(&msg, &info->notify[RX], sizeof(struct rpmsg_s_msg));
+ info->notify_updated[RX] = false;
+ spin_unlock_irqrestore(&info->lock[RX], flags);
+ info->send_message(&msg, info);
+ } else {
+ spin_unlock_irqrestore(&info->lock[RX], flags);
+ }
+
+ /* Skip the notification message for it has been processed above */
+ if (work_of_rpmsg->msg.s_msg.header.type == MSG_TYPE_C &&
+ (work_of_rpmsg->msg.s_msg.header.cmd == TX_PERIOD_DONE ||
+ work_of_rpmsg->msg.s_msg.header.cmd == RX_PERIOD_DONE))
+ is_notification = true;
+
+ if (!is_notification)
+ info->send_message(&work_of_rpmsg->msg, info);
+
+ /* update read index */
+ spin_lock_irqsave(&info->wq_lock, flags);
+ info->work_read_index++;
+ info->work_read_index %= WORK_MAX_NUM;
+ spin_unlock_irqrestore(&info->wq_lock, flags);
+}
+
+static int imx_rpmsg_pcm_probe(struct platform_device *pdev)
+{
+ struct snd_soc_component *component;
+ struct rpmsg_info *info;
+ int ret, i;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, info);
+
+ info->rpdev = container_of(pdev->dev.parent, struct rpmsg_device, dev);
+ info->dev = &pdev->dev;
+ /* Setup work queue */
+ info->rpmsg_wq = alloc_ordered_workqueue("rpmsg_audio",
+ WQ_HIGHPRI |
+ WQ_UNBOUND |
+ WQ_FREEZABLE);
+ if (!info->rpmsg_wq) {
+ dev_err(&pdev->dev, "workqueue create failed\n");
+ return -ENOMEM;
+ }
+
+ /* Write index initialize 1, make it differ with the read index */
+ info->work_write_index = 1;
+ info->send_message = imx_rpmsg_pcm_send_message;
+
+ for (i = 0; i < WORK_MAX_NUM; i++) {
+ INIT_WORK(&info->work_list[i].work, imx_rpmsg_pcm_work);
+ info->work_list[i].info = info;
+ }
+
+ /* Initialize msg */
+ for (i = 0; i < MSG_MAX_NUM; i++) {
+ info->msg[i].s_msg.header.cate = IMX_RPMSG_AUDIO;
+ info->msg[i].s_msg.header.major = IMX_RMPSG_MAJOR;
+ info->msg[i].s_msg.header.minor = IMX_RMPSG_MINOR;
+ info->msg[i].s_msg.header.type = MSG_TYPE_A;
+ info->msg[i].s_msg.param.audioindex = 0;
+ }
+
+ init_completion(&info->cmd_complete);
+ mutex_init(&info->msg_lock);
+ spin_lock_init(&info->lock[TX]);
+ spin_lock_init(&info->lock[RX]);
+ spin_lock_init(&info->wq_lock);
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &imx_rpmsg_soc_component,
+ NULL, 0);
+ if (ret)
+ goto fail;
+
+ component = snd_soc_lookup_component(&pdev->dev, IMX_PCM_DRV_NAME);
+ if (!component) {
+ ret = -EINVAL;
+ goto fail;
+ }
+#ifdef CONFIG_DEBUG_FS
+ component->debugfs_prefix = "rpmsg";
+#endif
+
+ return 0;
+
+fail:
+ if (info->rpmsg_wq)
+ destroy_workqueue(info->rpmsg_wq);
+
+ return ret;
+}
+
+static int imx_rpmsg_pcm_remove(struct platform_device *pdev)
+{
+ struct rpmsg_info *info = platform_get_drvdata(pdev);
+
+ if (info->rpmsg_wq)
+ destroy_workqueue(info->rpmsg_wq);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int imx_rpmsg_pcm_runtime_resume(struct device *dev)
+{
+ struct rpmsg_info *info = dev_get_drvdata(dev);
+
+ cpu_latency_qos_add_request(&info->pm_qos_req, 0);
+
+ return 0;
+}
+
+static int imx_rpmsg_pcm_runtime_suspend(struct device *dev)
+{
+ struct rpmsg_info *info = dev_get_drvdata(dev);
+
+ cpu_latency_qos_remove_request(&info->pm_qos_req);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int imx_rpmsg_pcm_suspend(struct device *dev)
+{
+ struct rpmsg_info *info = dev_get_drvdata(dev);
+ struct rpmsg_msg *rpmsg_tx;
+ struct rpmsg_msg *rpmsg_rx;
+
+ rpmsg_tx = &info->msg[TX_SUSPEND];
+ rpmsg_rx = &info->msg[RX_SUSPEND];
+
+ rpmsg_tx->s_msg.header.cmd = TX_SUSPEND;
+ info->send_message(rpmsg_tx, info);
+
+ rpmsg_rx->s_msg.header.cmd = RX_SUSPEND;
+ info->send_message(rpmsg_rx, info);
+
+ return 0;
+}
+
+static int imx_rpmsg_pcm_resume(struct device *dev)
+{
+ struct rpmsg_info *info = dev_get_drvdata(dev);
+ struct rpmsg_msg *rpmsg_tx;
+ struct rpmsg_msg *rpmsg_rx;
+
+ rpmsg_tx = &info->msg[TX_RESUME];
+ rpmsg_rx = &info->msg[RX_RESUME];
+
+ rpmsg_tx->s_msg.header.cmd = TX_RESUME;
+ info->send_message(rpmsg_tx, info);
+
+ rpmsg_rx->s_msg.header.cmd = RX_RESUME;
+ info->send_message(rpmsg_rx, info);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops imx_rpmsg_pcm_pm_ops = {
+ SET_RUNTIME_PM_OPS(imx_rpmsg_pcm_runtime_suspend,
+ imx_rpmsg_pcm_runtime_resume,
+ NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(imx_rpmsg_pcm_suspend,
+ imx_rpmsg_pcm_resume)
+};
+
+static struct platform_driver imx_pcm_rpmsg_driver = {
+ .probe = imx_rpmsg_pcm_probe,
+ .remove = imx_rpmsg_pcm_remove,
+ .driver = {
+ .name = IMX_PCM_DRV_NAME,
+ .pm = &imx_rpmsg_pcm_pm_ops,
+ },
+};
+module_platform_driver(imx_pcm_rpmsg_driver);
+
+MODULE_DESCRIPTION("Freescale SoC Audio RPMSG PCM interface");
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_ALIAS("platform:" IMX_PCM_DRV_NAME);
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/fsl/imx-pcm-rpmsg.h b/sound/soc/fsl/imx-pcm-rpmsg.h
new file mode 100644
index 000000000000..308d153920a3
--- /dev/null
+++ b/sound/soc/fsl/imx-pcm-rpmsg.h
@@ -0,0 +1,512 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2017-2021 NXP
+ *
+ ******************************************************************************
+ * Communication stack of audio with rpmsg
+ ******************************************************************************
+ * Packet structure:
+ * A SRTM message consists of a 10 bytes header followed by 0~N bytes of data
+ *
+ * +---------------+-------------------------------+
+ * | | Content |
+ * +---------------+-------------------------------+
+ * | Byte Offset | 7 6 5 4 3 2 1 0 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 0 | Category |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 1 ~ 2 | Version |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 3 | Type |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 4 | Command |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 5 | Reserved0 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 6 | Reserved1 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 7 | Reserved2 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 8 | Reserved3 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 9 | Reserved4 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | 10 | DATA 0 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ * : : : : : : : : : : : : :
+ * +---------------+---+---+---+---+---+---+---+---+
+ * | N + 10 - 1 | DATA N-1 |
+ * +---------------+---+---+---+---+---+---+---+---+
+ *
+ * +----------+------------+------------------------------------------------+
+ * | Field | Byte | |
+ * +----------+------------+------------------------------------------------+
+ * | Category | 0 | The destination category. |
+ * +----------+------------+------------------------------------------------+
+ * | Version | 1 ~ 2 | The category version of the sender of the |
+ * | | | packet. |
+ * | | | The first byte represent the major version of |
+ * | | | the packet.The second byte represent the minor |
+ * | | | version of the packet. |
+ * +----------+------------+------------------------------------------------+
+ * | Type | 3 | The message type of current message packet. |
+ * +----------+------------+------------------------------------------------+
+ * | Command | 4 | The command byte sent to remote processor/SoC. |
+ * +----------+------------+------------------------------------------------+
+ * | Reserved | 5 ~ 9 | Reserved field for future extension. |
+ * +----------+------------+------------------------------------------------+
+ * | Data | N | The data payload of the message packet. |
+ * +----------+------------+------------------------------------------------+
+ *
+ * Audio control:
+ * SRTM Audio Control Category Request Command Table:
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | Category | Version | Type | Command | Data | Function |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x00 | Data[0]: Audio Device Index | Open a TX Instance. |
+ * | | | | | Data[1]: format | |
+ * | | | | | Data[2]: channels | |
+ * | | | | | Data[3-6]: samplerate | |
+ * | | | | | Data[7-10]: buffer_addr | |
+ * | | | | | Data[11-14]: buffer_size | |
+ * | | | | | Data[15-18]: period_size | |
+ * | | | | | Data[19-22]: buffer_tail | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x01 | Data[0]: Audio Device Index | Start a TX Instance. |
+ * | | | | | Same as above command | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x02 | Data[0]: Audio Device Index | Pause a TX Instance. |
+ * | | | | | Same as above command | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x03 | Data[0]: Audio Device Index | Resume a TX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x04 | Data[0]: Audio Device Index | Stop a TX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x05 | Data[0]: Audio Device Index | Close a TX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x06 | Data[0]: Audio Device Index | Set Parameters for |
+ * | | | | | Data[1]: format | a TX Instance. |
+ * | | | | | Data[2]: channels | |
+ * | | | | | Data[3-6]: samplerate | |
+ * | | | | | Data[7-22]: reserved | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x07 | Data[0]: Audio Device Index | Set TX Buffer. |
+ * | | | | | Data[1-6]: reserved | |
+ * | | | | | Data[7-10]: buffer_addr | |
+ * | | | | | Data[11-14]: buffer_size | |
+ * | | | | | Data[15-18]: period_size | |
+ * | | | | | Data[19-22]: buffer_tail | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x08 | Data[0]: Audio Device Index | Suspend a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x09 | Data[0]: Audio Device Index | Resume a TX Instance. |
+ * | | | | | Data[1]: format | |
+ * | | | | | Data[2]: channels | |
+ * | | | | | Data[3-6]: samplerate | |
+ * | | | | | Data[7-10]: buffer_addr | |
+ * | | | | | Data[11-14]: buffer_size | |
+ * | | | | | Data[15-18]: period_size | |
+ * | | | | | Data[19-22]: buffer_tail | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0A | Data[0]: Audio Device Index | Open a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0B | Data[0]: Audio Device Index | Start a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0C | Data[0]: Audio Device Index | Pause a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0D | Data[0]: Audio Device Index | Resume a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0E | Data[0]: Audio Device Index | Stop a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x0F | Data[0]: Audio Device Index | Close a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x10 | Data[0]: Audio Device Index | Set Parameters for |
+ * | | | | | Data[1]: format | a RX Instance. |
+ * | | | | | Data[2]: channels | |
+ * | | | | | Data[3-6]: samplerate | |
+ * | | | | | Data[7-22]: reserved | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x11 | Data[0]: Audio Device Index | Set RX Buffer. |
+ * | | | | | Data[1-6]: reserved | |
+ * | | | | | Data[7-10]: buffer_addr | |
+ * | | | | | Data[11-14]: buffer_size | |
+ * | | | | | Data[15-18]: period_size | |
+ * | | | | | Data[19-22]: buffer_tail | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x12 | Data[0]: Audio Device Index | Suspend a RX Instance.|
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x13 | Data[0]: Audio Device Index | Resume a RX Instance. |
+ * | | | | | Data[1]: format | |
+ * | | | | | Data[2]: channels | |
+ * | | | | | Data[3-6]: samplerate | |
+ * | | | | | Data[7-10]: buffer_addr | |
+ * | | | | | Data[11-14]: buffer_size | |
+ * | | | | | Data[15-18]: period_size | |
+ * | | | | | Data[19-22]: buffer_tail | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x14 | Data[0]: Audio Device Index | Set register value |
+ * | | | | | Data[1-6]: reserved | to codec |
+ * | | | | | Data[7-10]: register | |
+ * | | | | | Data[11-14]: value | |
+ * | | | | | Data[15-22]: reserved | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x00 | 0x15 | Data[0]: Audio Device Index | Get register value |
+ * | | | | | Data[1-6]: reserved | from codec |
+ * | | | | | Data[7-10]: register | |
+ * | | | | | Data[11-22]: reserved | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * Note 1: See <List of Sample Format> for available value of
+ * Sample Format;
+ * Note 2: See <List of Audio Channels> for available value of Channels;
+ * Note 3: Sample Rate of Set Parameters for an Audio TX Instance
+ * Command and Set Parameters for an Audio RX Instance Command is
+ * in little-endian format.
+ *
+ * SRTM Audio Control Category Response Command Table:
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | Category | Version | Type | Command | Data | Function |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x00 | Data[0]: Audio Device Index | Reply for Open |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x01 | Data[0]: Audio Device Index | Reply for Start |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x02 | Data[0]: Audio Device Index | Reply for Pause |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x03 | Data[0]: Audio Device Index | Reply for Resume |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x04 | Data[0]: Audio Device Index | Reply for Stop |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x05 | Data[0]: Audio Device Index | Reply for Close |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x06 | Data[0]: Audio Device Index | Reply for Set Param |
+ * | | | | | Data[1]: Return code | for a TX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x07 | Data[0]: Audio Device Index | Reply for Set |
+ * | | | | | Data[1]: Return code | TX Buffer |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x08 | Data[0]: Audio Device Index | Reply for Suspend |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x09 | Data[0]: Audio Device Index | Reply for Resume |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0A | Data[0]: Audio Device Index | Reply for Open |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0B | Data[0]: Audio Device Index | Reply for Start |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0C | Data[0]: Audio Device Index | Reply for Pause |
+ * | | | | | Data[1]: Return code | a TX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0D | Data[0]: Audio Device Index | Reply for Resume |
+ * | | | | | Data[1]: Return code | a RX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0E | Data[0]: Audio Device Index | Reply for Stop |
+ * | | | | | Data[1]: Return code | a RX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x0F | Data[0]: Audio Device Index | Reply for Close |
+ * | | | | | Data[1]: Return code | a RX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x10 | Data[0]: Audio Device Index | Reply for Set Param |
+ * | | | | | Data[1]: Return code | for a RX Instance. |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x11 | Data[0]: Audio Device Index | Reply for Set |
+ * | | | | | Data[1]: Return code | RX Buffer |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x12 | Data[0]: Audio Device Index | Reply for Suspend |
+ * | | | | | Data[1]: Return code | a RX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x13 | Data[0]: Audio Device Index | Reply for Resume |
+ * | | | | | Data[1]: Return code | a RX Instance |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x14 | Data[0]: Audio Device Index | Reply for Set codec |
+ * | | | | | Data[1]: Return code | register value |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x01 | 0x15 | Data[0]: Audio Device Index | Reply for Get codec |
+ * | | | | | Data[1]: Return code | register value |
+ * | | | | | Data[2-6]: reserved | |
+ * | | | | | Data[7-10]: register | |
+ * | | | | | Data[11-14]: value | |
+ * | | | | | Data[15-22]: reserved | |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ *
+ * SRTM Audio Control Category Notification Command Table:
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | Category | Version | Type | Command | Data | Function |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x02 | 0x00 | Data[0]: Audio Device Index | Notify one TX period |
+ * | | | | | | is finished |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ * | 0x03 | 0x0100 | 0x02 | 0x01 | Data[0]: Audio Device Index | Notify one RX period |
+ * | | | | | | is finished |
+ * +----------+---------+------+---------+-------------------------------+-----------------------+
+ *
+ * List of Sample Format:
+ * +------------------+-----------------------+
+ * | Sample Format | Description |
+ * +------------------+-----------------------+
+ * | 0x0 | S16_LE |
+ * +------------------+-----------------------+
+ * | 0x1 | S24_LE |
+ * +------------------+-----------------------+
+ *
+ * List of Audio Channels
+ * +------------------+-----------------------+
+ * | Audio Channel | Description |
+ * +------------------+-----------------------+
+ * | 0x0 | Left Channel |
+ * +------------------+-----------------------+
+ * | 0x1 | Right Channel |
+ * +------------------+---------------- ------+
+ * | 0x2 | Left & Right Channel |
+ * +------------------+-----------------------+
+ *
+ */
+
+#ifndef _IMX_PCM_RPMSG_H
+#define _IMX_PCM_RPMSG_H
+
+#include <linux/pm_qos.h>
+#include <linux/interrupt.h>
+#include <sound/dmaengine_pcm.h>
+
+#define RPMSG_TIMEOUT 1000
+
+/* RPMSG Command (TYPE A)*/
+#define TX_OPEN 0x0
+#define TX_START 0x1
+#define TX_PAUSE 0x2
+#define TX_RESTART 0x3
+#define TX_TERMINATE 0x4
+#define TX_CLOSE 0x5
+#define TX_HW_PARAM 0x6
+#define TX_BUFFER 0x7
+#define TX_SUSPEND 0x8
+#define TX_RESUME 0x9
+
+#define RX_OPEN 0xA
+#define RX_START 0xB
+#define RX_PAUSE 0xC
+#define RX_RESTART 0xD
+#define RX_TERMINATE 0xE
+#define RX_CLOSE 0xF
+#define RX_HW_PARAM 0x10
+#define RX_BUFFER 0x11
+#define RX_SUSPEND 0x12
+#define RX_RESUME 0x13
+#define SET_CODEC_VALUE 0x14
+#define GET_CODEC_VALUE 0x15
+#define TX_POINTER 0x16
+#define RX_POINTER 0x17
+/* Total msg numver for type A */
+#define MSG_TYPE_A_NUM 0x18
+
+/* RPMSG Command (TYPE C)*/
+#define TX_PERIOD_DONE 0x0
+#define RX_PERIOD_DONE 0x1
+/* Total msg numver for type C */
+#define MSG_TYPE_C_NUM 0x2
+
+#define MSG_MAX_NUM (MSG_TYPE_A_NUM + MSG_TYPE_C_NUM)
+
+#define MSG_TYPE_A 0x0
+#define MSG_TYPE_B 0x1
+#define MSG_TYPE_C 0x2
+
+#define RESP_NONE 0x0
+#define RESP_NOT_ALLOWED 0x1
+#define RESP_SUCCESS 0x2
+#define RESP_FAILED 0x3
+
+#define RPMSG_S16_LE 0x0
+#define RPMSG_S24_LE 0x1
+#define RPMSG_S32_LE 0x2
+#define RPMSG_DSD_U16_LE 0x3
+#define RPMSG_DSD_U24_LE 0x4
+#define RPMSG_DSD_U32_LE 0x5
+
+#define RPMSG_CH_LEFT 0x0
+#define RPMSG_CH_RIGHT 0x1
+#define RPMSG_CH_STEREO 0x2
+
+#define WORK_MAX_NUM 0x30
+
+/* Category define */
+#define IMX_RMPSG_LIFECYCLE 1
+#define IMX_RPMSG_PMIC 2
+#define IMX_RPMSG_AUDIO 3
+#define IMX_RPMSG_KEY 4
+#define IMX_RPMSG_GPIO 5
+#define IMX_RPMSG_RTC 6
+#define IMX_RPMSG_SENSOR 7
+
+/* rpmsg version */
+#define IMX_RMPSG_MAJOR 1
+#define IMX_RMPSG_MINOR 0
+
+#define TX SNDRV_PCM_STREAM_PLAYBACK
+#define RX SNDRV_PCM_STREAM_CAPTURE
+
+/**
+ * struct rpmsg_head: rpmsg header structure
+ *
+ * @cate: category
+ * @major: major version
+ * @minor: minor version
+ * @type: message type (A/B/C)
+ * @cmd: message command
+ * @reserved: reserved space
+ */
+struct rpmsg_head {
+ u8 cate;
+ u8 major;
+ u8 minor;
+ u8 type;
+ u8 cmd;
+ u8 reserved[5];
+} __packed;
+
+/**
+ * struct param_s: sent rpmsg parameter
+ *
+ * @audioindex: audio instance index
+ * @format: audio format
+ * @channels: audio channel number
+ * @rate: sample rate
+ * @buffer_addr: dma buffer physical address or register for SET_CODEC_VALUE
+ * @buffer_size: dma buffer size or register value for SET_CODEC_VALUE
+ * @period_size: period size
+ * @buffer_tail: current period index
+ */
+struct param_s {
+ unsigned char audioindex;
+ unsigned char format;
+ unsigned char channels;
+ unsigned int rate;
+ unsigned int buffer_addr;
+ unsigned int buffer_size;
+ unsigned int period_size;
+ unsigned int buffer_tail;
+} __packed;
+
+/**
+ * struct param_s: send rpmsg parameter
+ *
+ * @audioindex: audio instance index
+ * @resp: response value
+ * @reserved1: reserved space
+ * @buffer_offset: the consumed offset of buffer
+ * @reg_addr: register addr of codec
+ * @reg_data: register value of codec
+ * @reserved2: reserved space
+ * @buffer_tail: current period index
+ */
+struct param_r {
+ unsigned char audioindex;
+ unsigned char resp;
+ unsigned char reserved1[1];
+ unsigned int buffer_offset;
+ unsigned int reg_addr;
+ unsigned int reg_data;
+ unsigned char reserved2[4];
+ unsigned int buffer_tail;
+} __packed;
+
+/* Struct of sent message */
+struct rpmsg_s_msg {
+ struct rpmsg_head header;
+ struct param_s param;
+};
+
+/* Struct of received message */
+struct rpmsg_r_msg {
+ struct rpmsg_head header;
+ struct param_r param;
+};
+
+/* Struct of rpmsg */
+struct rpmsg_msg {
+ struct rpmsg_s_msg s_msg;
+ struct rpmsg_r_msg r_msg;
+};
+
+/* Struct of rpmsg for workqueue */
+struct work_of_rpmsg {
+ struct rpmsg_info *info;
+ /* Sent msg for each work */
+ struct rpmsg_msg msg;
+ struct work_struct work;
+};
+
+/* Struct of timer */
+struct stream_timer {
+ struct timer_list timer;
+ struct rpmsg_info *info;
+ struct snd_pcm_substream *substream;
+};
+
+typedef void (*dma_callback)(void *arg);
+
+/**
+ * struct rpmsg_info: rpmsg audio information
+ *
+ * @rpdev: pointer of rpmsg_device
+ * @dev: pointer for imx_pcm_rpmsg device
+ * @cmd_complete: command is finished
+ * @pm_qos_req: request of pm qos
+ * @r_msg: received rpmsg
+ * @msg: array of rpmsg
+ * @notify: notification msg (type C) for TX & RX
+ * @notify_updated: notification flag for TX & RX
+ * @rpmsg_wq: rpmsg workqueue
+ * @work_list: array of work list for workqueue
+ * @work_write_index: write index of work list
+ * @work_read_index: read index of work list
+ * @msg_drop_count: counter of dropped msg for TX & RX
+ * @num_period: period number for TX & RX
+ * @callback_param: parameter for period elapse callback for TX & RX
+ * @callback: period elapse callback for TX & RX
+ * @send_message: function pointer for send message
+ * @lock: spin lock for TX & RX
+ * @wq_lock: lock for work queue
+ * @msg_lock: lock for send message
+ * @stream_timer: timer for tigger workqueue
+ */
+struct rpmsg_info {
+ struct rpmsg_device *rpdev;
+ struct device *dev;
+ struct completion cmd_complete;
+ struct pm_qos_request pm_qos_req;
+
+ /* Received msg (global) */
+ struct rpmsg_r_msg r_msg;
+ struct rpmsg_msg msg[MSG_MAX_NUM];
+ /* period done */
+ struct rpmsg_msg notify[2];
+ bool notify_updated[2];
+
+ struct workqueue_struct *rpmsg_wq;
+ struct work_of_rpmsg work_list[WORK_MAX_NUM];
+ int work_write_index;
+ int work_read_index;
+ int msg_drop_count[2];
+ int num_period[2];
+ void *callback_param[2];
+ dma_callback callback[2];
+ int (*send_message)(struct rpmsg_msg *msg, struct rpmsg_info *info);
+ spinlock_t lock[2]; /* spin lock for resource protection */
+ spinlock_t wq_lock; /* spin lock for resource protection */
+ struct mutex msg_lock; /* mutex for resource protection */
+ struct stream_timer stream_timer[2];
+};
+
+#define IMX_PCM_DRV_NAME "imx_pcm_rpmsg"
+
+#endif /* IMX_PCM_RPMSG_H */
--
2.27.0
^ permalink raw reply related
* Re: PowerPC64 future proof kernel toc, revised for lld
From: Alexey Kardashevskiy @ 2021-03-12 3:45 UTC (permalink / raw)
To: Michael Ellerman, Alan Modra, Christophe Leroy
Cc: alexey, Alexey Kardashevskiy, linuxppc-dev
In-Reply-To: <87mtv9jmgf.fsf@mpe.ellerman.id.au>
On 12/03/2021 10:32, Michael Ellerman wrote:
> Alan Modra <amodra@gmail.com> writes:
>> On Wed, Mar 10, 2021 at 01:44:57PM +0100, Christophe Leroy wrote:
>>>
>>> Le 10/03/2021 à 13:25, Alan Modra a écrit :
>>>> On Wed, Mar 10, 2021 at 08:33:37PM +1100, Alexey Kardashevskiy wrote:
>>>>> One more question - the older version had a construct "DEFINED (.TOC.) ?
>>>>> .TOC. : ..." in case .TOC. is not defined (too old ld? too old gcc?) but the
>>>>> newer patch seems assuming it is always defined, when was it added? I have
>>>>> the same check in SLOF, for example, do I still need it?
>>>>
>>>> .TOC. symbol support was first added 2012-11-06, so you need
>>>> binutils-2.24 or later to use .TOC. as a symbol.
>>>>
>>>
>>> As of today, minimum requirement to build kernel is binutils 2.23, see https://urldefense.proofpoint.com/v2/url?u=https-3A__www.kernel.org_doc_html_latest_process_changes.html-23current-2Dminimal-2Drequirements&d=DwIDAw&c=jf_iaSHvJObTbx-siA1ZOg&r=uzpscot8Q8p-51o1Gp1vnzKV94bfny2qmUdVe821lv0&m=SYi605mn0I1hf1QoHuvHXtS_Z-R6JJHbzS34cEtV2Tk&s=47ckf3yxVcP6RwRb8D9viYOQSWpf6rXrnWj4YM4OTJ0&e=
>>
>> Yes, and arch/powerpc/Makefile complains about 2.24. So for powerpc
>> that means you need to go to at least 2.25.
>
> Not quite. It only complains for little endian builds, and only if you
> have stock 2.24, it will allow a 2.24.<something>.
>
> I do most of my builds with 2.34, so I have no issue with newer
> binutils. But we try not to increase the minimum version too rapidly to
> accommodate folks using older and/or "Enterprise" distros that are stuck
> on old toolchains.
>
> I think we are within our rights to increase the minimum requirement for
> powerpc builds, if it brings advantages we can identify.
>
> The way to do that would be to add a new check in our arch Makefile that
> rejects the older versions.
The upstream llvm just learnt to handle the .TOC. symbol in linker
scripts so we may delay the future for a bit longer :) @dja wanted
upstream llvm anyway and the currently supported llvm 10.xx is not much
value for our experiments.
https://github.com/llvm/llvm-project/commit/e4f385d89448393b4d213339bbbbbbaa42b49489
--
Alexey
^ permalink raw reply
* Re: [PATCH v3 03/41] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB
From: Daniel Axtens @ 2021-03-12 5:07 UTC (permalink / raw)
To: Nicholas Piggin, kvm-ppc; +Cc: linuxppc-dev, Nicholas Piggin, Fabiano Rosas
In-Reply-To: <20210305150638.2675513-4-npiggin@gmail.com>
Hi Nick,
> This SPR is set to 0 twice when exiting the guest.
>
Indeed it is.
I checked the ISA because I'd never heard of the PSPB SPR before! It's
the Problem State Priority Boost register. Before I knew what it was, I
was slightly concerned that the chip might change the value while the
other mtsprs were running, but given that it's just affects the priority
boost states that problem state can use, I don't think that is actually
going to happen.
I also checked the commit that introduced it - commit 95a6432ce903
("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix
guests"), and there wasn't any justification for having a double mtspr.
So, this seems good:
Reviewed-by: Daniel Axtens <dja@axtens.net>
Kind regards,
Daniel
> Suggested-by: Fabiano Rosas <farosas@linux.ibm.com>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
> arch/powerpc/kvm/book3s_hv.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> index 2e29b96ef775..0542d7f17dc3 100644
> --- a/arch/powerpc/kvm/book3s_hv.c
> +++ b/arch/powerpc/kvm/book3s_hv.c
> @@ -3758,7 +3758,6 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
> mtspr(SPRN_DSCR, host_dscr);
> mtspr(SPRN_TIDR, host_tidr);
> mtspr(SPRN_IAMR, host_iamr);
> - mtspr(SPRN_PSPB, 0);
>
> if (host_amr != vcpu->arch.amr)
> mtspr(SPRN_AMR, host_amr);
> --
> 2.23.0
^ permalink raw reply
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