add write_s function in cmdq helper functions which
writes a constant value to address with large dma
access support.
Signed-off-by: Dennis YC Hsieh <[email protected]>
Reviewed-by: CK Hu <[email protected]>
---
drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 03c129230cd7..a9ebbabb7439 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
}
EXPORT_SYMBOL(cmdq_pkt_write_s);
+int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+ u16 addr_low, u32 value, u32 mask)
+{
+ struct cmdq_instruction inst = { {0} };
+ int err;
+
+ if (mask != U32_MAX) {
+ inst.op = CMDQ_CODE_MASK;
+ inst.mask = ~mask;
+ err = cmdq_pkt_append_command(pkt, inst);
+ if (err < 0)
+ return err;
+
+ inst.op = CMDQ_CODE_WRITE_S_MASK;
+ } else {
+ inst.op = CMDQ_CODE_WRITE_S;
+ }
+
+ inst.sop = high_addr_reg_idx;
+ inst.offset = addr_low;
+ inst.value = value;
+
+ return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_write_s_value);
+
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
{
struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 01b4184af310..fec292aac83c 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
u16 addr_low, u16 src_reg_idx, u32 mask);
+/**
+ * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
+ * packet which write value to a physical address
+ * @pkt: the CMDQ packet
+ * @high_addr_reg_idx: internal regisger ID which contains high address of pa
+ * @addr_low: low address of pa
+ * @value: the specified target value
+ * @mask: the specified target mask
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
+ u16 addr_low, u32 value, u32 mask);
+
/**
* cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
* @pkt: the CMDQ packet
--
2.18.0
On 08/03/2020 11:52, Dennis YC Hsieh wrote:
> add write_s function in cmdq helper functions which
> writes a constant value to address with large dma
> access support.
>
> Signed-off-by: Dennis YC Hsieh <[email protected]>
> Reviewed-by: CK Hu <[email protected]>
> ---
> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
> 2 files changed, 40 insertions(+)
>
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 03c129230cd7..a9ebbabb7439 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> }
> EXPORT_SYMBOL(cmdq_pkt_write_s);
>
> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> + u16 addr_low, u32 value, u32 mask)
> +{
> + struct cmdq_instruction inst = { {0} };
> + int err;
> +
> + if (mask != U32_MAX) {
> + inst.op = CMDQ_CODE_MASK;
> + inst.mask = ~mask;
> + err = cmdq_pkt_append_command(pkt, inst);
> + if (err < 0)
> + return err;
> +
> + inst.op = CMDQ_CODE_WRITE_S_MASK;
> + } else {
> + inst.op = CMDQ_CODE_WRITE_S;
> + }
> +
> + inst.sop = high_addr_reg_idx;
Writing u16 value in a 5 bit wide variable?
> + inst.offset = addr_low;
> + inst.value = value;
> +
> + return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
> +
> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
> {
> struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 01b4184af310..fec292aac83c 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> u16 addr_low, u16 src_reg_idx, u32 mask);
>
> +/**
> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
> + * packet which write value to a physical address
> + * @pkt: the CMDQ packet
> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
register
> + * @addr_low: low address of pa
> + * @value: the specified target value
> + * @mask: the specified target mask
> + *
> + * Return: 0 for success; else the error code is returned
> + */
> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> + u16 addr_low, u32 value, u32 mask);
> +
> /**
> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
> * @pkt: the CMDQ packet
>
Hi Matthias,
Thanks for your comment.
On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
>
> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
> > add write_s function in cmdq helper functions which
> > writes a constant value to address with large dma
> > access support.
> >
> > Signed-off-by: Dennis YC Hsieh <[email protected]>
> > Reviewed-by: CK Hu <[email protected]>
> > ---
> > drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
> > include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
> > 2 files changed, 40 insertions(+)
> >
> > diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> > index 03c129230cd7..a9ebbabb7439 100644
> > --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> > +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> > @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> > }
> > EXPORT_SYMBOL(cmdq_pkt_write_s);
> >
> > +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> > + u16 addr_low, u32 value, u32 mask)
> > +{
> > + struct cmdq_instruction inst = { {0} };
> > + int err;
> > +
> > + if (mask != U32_MAX) {
> > + inst.op = CMDQ_CODE_MASK;
> > + inst.mask = ~mask;
> > + err = cmdq_pkt_append_command(pkt, inst);
> > + if (err < 0)
> > + return err;
> > +
> > + inst.op = CMDQ_CODE_WRITE_S_MASK;
> > + } else {
> > + inst.op = CMDQ_CODE_WRITE_S;
> > + }
> > +
> > + inst.sop = high_addr_reg_idx;
>
> Writing u16 value in a 5 bit wide variable?
We need only 5 bits in this case. I'll change high_addr_reg_idx
parameter to u8.
>
> > + inst.offset = addr_low;
> > + inst.value = value;
> > +
> > + return cmdq_pkt_append_command(pkt, inst);
> > +}
> > +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
> > +
> > int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
> > {
> > struct cmdq_instruction inst = { {0} };
> > diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> > index 01b4184af310..fec292aac83c 100644
> > --- a/include/linux/soc/mediatek/mtk-cmdq.h
> > +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> > @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> > int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> > u16 addr_low, u16 src_reg_idx, u32 mask);
> >
> > +/**
> > + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
> > + * packet which write value to a physical address
> > + * @pkt: the CMDQ packet
> > + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
>
> register
will fix
Regards,
Dennis
>
> > + * @addr_low: low address of pa
> > + * @value: the specified target value
> > + * @mask: the specified target mask
> > + *
> > + * Return: 0 for success; else the error code is returned
> > + */
> > +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> > + u16 addr_low, u32 value, u32 mask);
> > +
> > /**
> > * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
> > * @pkt: the CMDQ packet
> >
On 24/05/2020 19:31, Dennis-YC Hsieh wrote:
> Hi Matthias,
>
> Thanks for your comment.
>
> On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
>>
>> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
>>> add write_s function in cmdq helper functions which
>>> writes a constant value to address with large dma
>>> access support.
>>>
>>> Signed-off-by: Dennis YC Hsieh <[email protected]>
>>> Reviewed-by: CK Hu <[email protected]>
>>> ---
>>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
>>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
>>> 2 files changed, 40 insertions(+)
>>>
>>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> index 03c129230cd7..a9ebbabb7439 100644
>>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>> }
>>> EXPORT_SYMBOL(cmdq_pkt_write_s);
>>>
>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>> + u16 addr_low, u32 value, u32 mask)
>>> +{
>>> + struct cmdq_instruction inst = { {0} };
>>> + int err;
>>> +
>>> + if (mask != U32_MAX) {
>>> + inst.op = CMDQ_CODE_MASK;
>>> + inst.mask = ~mask;
>>> + err = cmdq_pkt_append_command(pkt, inst);
>>> + if (err < 0)
>>> + return err;
>>> +
>>> + inst.op = CMDQ_CODE_WRITE_S_MASK;
>>> + } else {
>>> + inst.op = CMDQ_CODE_WRITE_S;
>>> + }
>>> +
>>> + inst.sop = high_addr_reg_idx;
>>
>> Writing u16 value in a 5 bit wide variable?
>
> We need only 5 bits in this case. I'll change high_addr_reg_idx
> parameter to u8.
>
Ok, please make sure to mask the value, so that it's explicit in the code that
we only use the lowest 5 bits of high_addr_reg_idx.
Regards,
Matthias
>>
>>> + inst.offset = addr_low;
>>> + inst.value = value;
>>> +
>>> + return cmdq_pkt_append_command(pkt, inst);
>>> +}
>>> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
>>> +
>>> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
>>> {
>>> struct cmdq_instruction inst = { {0} };
>>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
>>> index 01b4184af310..fec292aac83c 100644
>>> --- a/include/linux/soc/mediatek/mtk-cmdq.h
>>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
>>> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
>>> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>> u16 addr_low, u16 src_reg_idx, u32 mask);
>>>
>>> +/**
>>> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
>>> + * packet which write value to a physical address
>>> + * @pkt: the CMDQ packet
>>> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
>>
>> register
>
> will fix
>
>
> Regards,
> Dennis
>
>>
>>> + * @addr_low: low address of pa
>>> + * @value: the specified target value
>>> + * @mask: the specified target mask
>>> + *
>>> + * Return: 0 for success; else the error code is returned
>>> + */
>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>> + u16 addr_low, u32 value, u32 mask);
>>> +
>>> /**
>>> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
>>> * @pkt: the CMDQ packet
>>>
>
On Sun, 2020-05-24 at 20:13 +0200, Matthias Brugger wrote:
>
> On 24/05/2020 19:31, Dennis-YC Hsieh wrote:
> > Hi Matthias,
> >
> > Thanks for your comment.
> >
> > On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
> >>
> >> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
> >>> add write_s function in cmdq helper functions which
> >>> writes a constant value to address with large dma
> >>> access support.
> >>>
> >>> Signed-off-by: Dennis YC Hsieh <[email protected]>
> >>> Reviewed-by: CK Hu <[email protected]>
> >>> ---
> >>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
> >>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
> >>> 2 files changed, 40 insertions(+)
> >>>
> >>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>> index 03c129230cd7..a9ebbabb7439 100644
> >>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>> }
> >>> EXPORT_SYMBOL(cmdq_pkt_write_s);
> >>>
> >>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>> + u16 addr_low, u32 value, u32 mask)
> >>> +{
> >>> + struct cmdq_instruction inst = { {0} };
> >>> + int err;
> >>> +
> >>> + if (mask != U32_MAX) {
> >>> + inst.op = CMDQ_CODE_MASK;
> >>> + inst.mask = ~mask;
> >>> + err = cmdq_pkt_append_command(pkt, inst);
> >>> + if (err < 0)
> >>> + return err;
> >>> +
> >>> + inst.op = CMDQ_CODE_WRITE_S_MASK;
> >>> + } else {
> >>> + inst.op = CMDQ_CODE_WRITE_S;
> >>> + }
> >>> +
> >>> + inst.sop = high_addr_reg_idx;
> >>
> >> Writing u16 value in a 5 bit wide variable?
> >
> > We need only 5 bits in this case. I'll change high_addr_reg_idx
> > parameter to u8.
> >
>
> Ok, please make sure to mask the value, so that it's explicit in the code that
> we only use the lowest 5 bits of high_addr_reg_idx.
Is it necessary to mask the value?
Since sop already defined as "u8 sop:5;", I thought it is explicit that
only use 5 bits and compiler should do the rest jobs.
Regards,
Dennis
>
> Regards,
> Matthias
>
> >>
> >>> + inst.offset = addr_low;
> >>> + inst.value = value;
> >>> +
> >>> + return cmdq_pkt_append_command(pkt, inst);
> >>> +}
> >>> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
> >>> +
> >>> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
> >>> {
> >>> struct cmdq_instruction inst = { {0} };
> >>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> >>> index 01b4184af310..fec292aac83c 100644
> >>> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> >>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> >>> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> >>> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>> u16 addr_low, u16 src_reg_idx, u32 mask);
> >>>
> >>> +/**
> >>> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
> >>> + * packet which write value to a physical address
> >>> + * @pkt: the CMDQ packet
> >>> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
> >>
> >> register
> >
> > will fix
> >
> >
> > Regards,
> > Dennis
> >
> >>
> >>> + * @addr_low: low address of pa
> >>> + * @value: the specified target value
> >>> + * @mask: the specified target mask
> >>> + *
> >>> + * Return: 0 for success; else the error code is returned
> >>> + */
> >>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>> + u16 addr_low, u32 value, u32 mask);
> >>> +
> >>> /**
> >>> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
> >>> * @pkt: the CMDQ packet
> >>>
> >
On 25/05/2020 04:27, Dennis-YC Hsieh wrote:
>
> On Sun, 2020-05-24 at 20:13 +0200, Matthias Brugger wrote:
>>
>> On 24/05/2020 19:31, Dennis-YC Hsieh wrote:
>>> Hi Matthias,
>>>
>>> Thanks for your comment.
>>>
>>> On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
>>>>
>>>> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
>>>>> add write_s function in cmdq helper functions which
>>>>> writes a constant value to address with large dma
>>>>> access support.
>>>>>
>>>>> Signed-off-by: Dennis YC Hsieh <[email protected]>
>>>>> Reviewed-by: CK Hu <[email protected]>
>>>>> ---
>>>>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
>>>>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
>>>>> 2 files changed, 40 insertions(+)
>>>>>
>>>>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>> index 03c129230cd7..a9ebbabb7439 100644
>>>>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>> }
>>>>> EXPORT_SYMBOL(cmdq_pkt_write_s);
>>>>>
>>>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>> + u16 addr_low, u32 value, u32 mask)
>>>>> +{
>>>>> + struct cmdq_instruction inst = { {0} };
>>>>> + int err;
>>>>> +
>>>>> + if (mask != U32_MAX) {
>>>>> + inst.op = CMDQ_CODE_MASK;
>>>>> + inst.mask = ~mask;
>>>>> + err = cmdq_pkt_append_command(pkt, inst);
>>>>> + if (err < 0)
>>>>> + return err;
>>>>> +
>>>>> + inst.op = CMDQ_CODE_WRITE_S_MASK;
>>>>> + } else {
>>>>> + inst.op = CMDQ_CODE_WRITE_S;
>>>>> + }
>>>>> +
>>>>> + inst.sop = high_addr_reg_idx;
>>>>
>>>> Writing u16 value in a 5 bit wide variable?
>>>
>>> We need only 5 bits in this case. I'll change high_addr_reg_idx
>>> parameter to u8.
>>>
>>
>> Ok, please make sure to mask the value, so that it's explicit in the code that
>> we only use the lowest 5 bits of high_addr_reg_idx.
>
> Is it necessary to mask the value?
> Since sop already defined as "u8 sop:5;", I thought it is explicit that
> only use 5 bits and compiler should do the rest jobs.
Yes but it makes the code more explicit if we have a
inst.sop = high_addr_reg_idx & 0x1f;
What do you think?
Regards,
Matthias
>
>
> Regards,
> Dennis
>
>>
>> Regards,
>> Matthias
>>
>>>>
>>>>> + inst.offset = addr_low;
>>>>> + inst.value = value;
>>>>> +
>>>>> + return cmdq_pkt_append_command(pkt, inst);
>>>>> +}
>>>>> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
>>>>> +
>>>>> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
>>>>> {
>>>>> struct cmdq_instruction inst = { {0} };
>>>>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
>>>>> index 01b4184af310..fec292aac83c 100644
>>>>> --- a/include/linux/soc/mediatek/mtk-cmdq.h
>>>>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
>>>>> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
>>>>> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>> u16 addr_low, u16 src_reg_idx, u32 mask);
>>>>>
>>>>> +/**
>>>>> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
>>>>> + * packet which write value to a physical address
>>>>> + * @pkt: the CMDQ packet
>>>>> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
>>>>
>>>> register
>>>
>>> will fix
>>>
>>>
>>> Regards,
>>> Dennis
>>>
>>>>
>>>>> + * @addr_low: low address of pa
>>>>> + * @value: the specified target value
>>>>> + * @mask: the specified target mask
>>>>> + *
>>>>> + * Return: 0 for success; else the error code is returned
>>>>> + */
>>>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>> + u16 addr_low, u32 value, u32 mask);
>>>>> +
>>>>> /**
>>>>> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
>>>>> * @pkt: the CMDQ packet
>>>>>
>>>
>
On Mon, 2020-05-25 at 10:39 +0200, Matthias Brugger wrote:
>
> On 25/05/2020 04:27, Dennis-YC Hsieh wrote:
> >
> > On Sun, 2020-05-24 at 20:13 +0200, Matthias Brugger wrote:
> >>
> >> On 24/05/2020 19:31, Dennis-YC Hsieh wrote:
> >>> Hi Matthias,
> >>>
> >>> Thanks for your comment.
> >>>
> >>> On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
> >>>>
> >>>> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
> >>>>> add write_s function in cmdq helper functions which
> >>>>> writes a constant value to address with large dma
> >>>>> access support.
> >>>>>
> >>>>> Signed-off-by: Dennis YC Hsieh <[email protected]>
> >>>>> Reviewed-by: CK Hu <[email protected]>
> >>>>> ---
> >>>>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
> >>>>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
> >>>>> 2 files changed, 40 insertions(+)
> >>>>>
> >>>>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>>>> index 03c129230cd7..a9ebbabb7439 100644
> >>>>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>>>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> >>>>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>>>> }
> >>>>> EXPORT_SYMBOL(cmdq_pkt_write_s);
> >>>>>
> >>>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>>>> + u16 addr_low, u32 value, u32 mask)
> >>>>> +{
> >>>>> + struct cmdq_instruction inst = { {0} };
> >>>>> + int err;
> >>>>> +
> >>>>> + if (mask != U32_MAX) {
> >>>>> + inst.op = CMDQ_CODE_MASK;
> >>>>> + inst.mask = ~mask;
> >>>>> + err = cmdq_pkt_append_command(pkt, inst);
> >>>>> + if (err < 0)
> >>>>> + return err;
> >>>>> +
> >>>>> + inst.op = CMDQ_CODE_WRITE_S_MASK;
> >>>>> + } else {
> >>>>> + inst.op = CMDQ_CODE_WRITE_S;
> >>>>> + }
> >>>>> +
> >>>>> + inst.sop = high_addr_reg_idx;
> >>>>
> >>>> Writing u16 value in a 5 bit wide variable?
> >>>
> >>> We need only 5 bits in this case. I'll change high_addr_reg_idx
> >>> parameter to u8.
> >>>
> >>
> >> Ok, please make sure to mask the value, so that it's explicit in the code that
> >> we only use the lowest 5 bits of high_addr_reg_idx.
> >
> > Is it necessary to mask the value?
> > Since sop already defined as "u8 sop:5;", I thought it is explicit that
> > only use 5 bits and compiler should do the rest jobs.
>
> Yes but it makes the code more explicit if we have a
> inst.sop = high_addr_reg_idx & 0x1f;
>
> What do you think?
The value assign to sop will restrict by hardware spec. Clients call
this function will define constant value and use it as parameter. So I
think we don't worry about client call this api with wrong value.
Regards,
Dennis
>
> Regards,
> Matthias
>
> >
> >
> > Regards,
> > Dennis
> >
> >>
> >> Regards,
> >> Matthias
> >>
> >>>>
> >>>>> + inst.offset = addr_low;
> >>>>> + inst.value = value;
> >>>>> +
> >>>>> + return cmdq_pkt_append_command(pkt, inst);
> >>>>> +}
> >>>>> +EXPORT_SYMBOL(cmdq_pkt_write_s_value);
> >>>>> +
> >>>>> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
> >>>>> {
> >>>>> struct cmdq_instruction inst = { {0} };
> >>>>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> >>>>> index 01b4184af310..fec292aac83c 100644
> >>>>> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> >>>>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> >>>>> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low,
> >>>>> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>>>> u16 addr_low, u16 src_reg_idx, u32 mask);
> >>>>>
> >>>>> +/**
> >>>>> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ
> >>>>> + * packet which write value to a physical address
> >>>>> + * @pkt: the CMDQ packet
> >>>>> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa
> >>>>
> >>>> register
> >>>
> >>> will fix
> >>>
> >>>
> >>> Regards,
> >>> Dennis
> >>>
> >>>>
> >>>>> + * @addr_low: low address of pa
> >>>>> + * @value: the specified target value
> >>>>> + * @mask: the specified target mask
> >>>>> + *
> >>>>> + * Return: 0 for success; else the error code is returned
> >>>>> + */
> >>>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
> >>>>> + u16 addr_low, u32 value, u32 mask);
> >>>>> +
> >>>>> /**
> >>>>> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
> >>>>> * @pkt: the CMDQ packet
> >>>>>
> >>>
> >
On 25/05/2020 12:38, Dennis-YC Hsieh wrote:
>
> On Mon, 2020-05-25 at 10:39 +0200, Matthias Brugger wrote:
>>
>> On 25/05/2020 04:27, Dennis-YC Hsieh wrote:
>>>
>>> On Sun, 2020-05-24 at 20:13 +0200, Matthias Brugger wrote:
>>>>
>>>> On 24/05/2020 19:31, Dennis-YC Hsieh wrote:
>>>>> Hi Matthias,
>>>>>
>>>>> Thanks for your comment.
>>>>>
>>>>> On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote:
>>>>>>
>>>>>> On 08/03/2020 11:52, Dennis YC Hsieh wrote:
>>>>>>> add write_s function in cmdq helper functions which
>>>>>>> writes a constant value to address with large dma
>>>>>>> access support.
>>>>>>>
>>>>>>> Signed-off-by: Dennis YC Hsieh <[email protected]>
>>>>>>> Reviewed-by: CK Hu <[email protected]>
>>>>>>> ---
>>>>>>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
>>>>>>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++
>>>>>>> 2 files changed, 40 insertions(+)
>>>>>>>
>>>>>>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>>>> index 03c129230cd7..a9ebbabb7439 100644
>>>>>>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>>>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
>>>>>>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>>>> }
>>>>>>> EXPORT_SYMBOL(cmdq_pkt_write_s);
>>>>>>>
>>>>>>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx,
>>>>>>> + u16 addr_low, u32 value, u32 mask)
>>>>>>> +{
>>>>>>> + struct cmdq_instruction inst = { {0} };
>>>>>>> + int err;
>>>>>>> +
>>>>>>> + if (mask != U32_MAX) {
>>>>>>> + inst.op = CMDQ_CODE_MASK;
>>>>>>> + inst.mask = ~mask;
>>>>>>> + err = cmdq_pkt_append_command(pkt, inst);
>>>>>>> + if (err < 0)
>>>>>>> + return err;
>>>>>>> +
>>>>>>> + inst.op = CMDQ_CODE_WRITE_S_MASK;
>>>>>>> + } else {
>>>>>>> + inst.op = CMDQ_CODE_WRITE_S;
>>>>>>> + }
>>>>>>> +
>>>>>>> + inst.sop = high_addr_reg_idx;
>>>>>>
>>>>>> Writing u16 value in a 5 bit wide variable?
>>>>>
>>>>> We need only 5 bits in this case. I'll change high_addr_reg_idx
>>>>> parameter to u8.
>>>>>
>>>>
>>>> Ok, please make sure to mask the value, so that it's explicit in the code that
>>>> we only use the lowest 5 bits of high_addr_reg_idx.
>>>
>>> Is it necessary to mask the value?
>>> Since sop already defined as "u8 sop:5;", I thought it is explicit that
>>> only use 5 bits and compiler should do the rest jobs.
>>
>> Yes but it makes the code more explicit if we have a
>> inst.sop = high_addr_reg_idx & 0x1f;
>>
>> What do you think?
>
> The value assign to sop will restrict by hardware spec. Clients call
> this function will define constant value and use it as parameter. So I
> think we don't worry about client call this api with wrong value.
>
Ok, then let's change the parameter to u8 and don't add a mask.
Regards,
Matthias