[RFC PATCH 20/97] drm/i915/guc: Introduce unified HXG messages
Michal Wajdeczko
michal.wajdeczko at intel.com
Tue May 11 22:11:40 UTC 2021
On 11.05.2021 17:16, Daniel Vetter wrote:
> On Thu, May 06, 2021 at 12:13:34PM -0700, Matthew Brost wrote:
>> From: Michal Wajdeczko <michal.wajdeczko at intel.com>
>>
>> New GuC firmware will unify format of MMIO and CTB H2G messages.
>> Introduce their definitions now to allow gradual transition of
>> our code to match new changes.
>>
>> Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
>> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
>> Cc: Michał Winiarski <michal.winiarski at intel.com>
>> ---
>> .../gpu/drm/i915/gt/uc/abi/guc_messages_abi.h | 226 ++++++++++++++++++
>> 1 file changed, 226 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/gt/uc/abi/guc_messages_abi.h b/drivers/gpu/drm/i915/gt/uc/abi/guc_messages_abi.h
>> index 775e21f3058c..1c264819aa03 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/abi/guc_messages_abi.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/abi/guc_messages_abi.h
>> @@ -6,6 +6,232 @@
>> #ifndef _ABI_GUC_MESSAGES_ABI_H
>> #define _ABI_GUC_MESSAGES_ABI_H
>>
>> +/**
>> + * DOC: HXG Message
>
> These aren't useful if we don't pull them in somewhere in the
> Documentation/gpu hierarchy. General comment, and also please check that
> it all renders correctly still.
Patch that connects all these DOC sections into i915.rst is still on
private branch, where I'm trying to verify all html rendering, and ...
>
> btw if you respin a patch not originally by you we generally add a (v1) to
> the original s-o-b line (or whever the version split was) and explain in
> the usual changelog in the commit message what was changed.
>
> This holds for the entire series ofc.
> -Daniel
>
>> + *
>> + * All messages exchanged with GuC are defined using 32 bit dwords.
>> + * First dword is treated as a message header. Remaining dwords are optional.
>> + *
>> + * .. _HXG Message:
where such workarounds from early documentation are already removed,
since they are not needed any more starting from commit ef09989594bf
("scripts/kernel-doc: add internal hyperlink to DOC: sections")
Michal
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | | | |
>> + * | 0 | 31 | **ORIGIN** - originator of the message |
>> + * | | | - _`GUC_HXG_ORIGIN_HOST` = 0 |
>> + * | | | - _`GUC_HXG_ORIGIN_GUC` = 1 |
>> + * | | | |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | **TYPE** - message type |
>> + * | | | - _`GUC_HXG_TYPE_REQUEST` = 0 |
>> + * | | | - _`GUC_HXG_TYPE_EVENT` = 1 |
>> + * | | | - _`GUC_HXG_TYPE_NO_RESPONSE_BUSY` = 3 |
>> + * | | | - _`GUC_HXG_TYPE_NO_RESPONSE_RETRY` = 5 |
>> + * | | | - _`GUC_HXG_TYPE_RESPONSE_FAILURE` = 6 |
>> + * | | | - _`GUC_HXG_TYPE_RESPONSE_SUCCESS` = 7 |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:0 | **AUX** - auxiliary data (depends TYPE) |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | 1 | 31:0 | optional payload (depends on TYPE) |
>> + * +---+-------+ |
>> + * |...| | |
>> + * +---+-------+ |
>> + * | n | 31:0 | |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_MSG_MIN_LEN 1u
>> +#define GUC_HXG_MSG_0_ORIGIN (0x1 << 31)
>> +#define GUC_HXG_ORIGIN_HOST 0u
>> +#define GUC_HXG_ORIGIN_GUC 1u
>> +#define GUC_HXG_MSG_0_TYPE (0x7 << 28)
>> +#define GUC_HXG_TYPE_REQUEST 0u
>> +#define GUC_HXG_TYPE_EVENT 1u
>> +#define GUC_HXG_TYPE_NO_RESPONSE_BUSY 3u
>> +#define GUC_HXG_TYPE_NO_RESPONSE_RETRY 5u
>> +#define GUC_HXG_TYPE_RESPONSE_FAILURE 6u
>> +#define GUC_HXG_TYPE_RESPONSE_SUCCESS 7u
>> +#define GUC_HXG_MSG_0_AUX (0xfffffff << 0)
>> +
>> +/**
>> + * DOC: HXG Request
>> + *
>> + * The `HXG Request`_ message should be used to initiate synchronous activity
>> + * for which confirmation or return data is expected.
>> + *
>> + * The recipient of this message shall use `HXG Response`_, `HXG Failure`_
>> + * or `HXG Retry`_ message as a definite reply, and may use `HXG Busy`_
>> + * message as a intermediate reply.
>> + *
>> + * Format of @DATA0 and all @DATAn fields depends on the @ACTION code.
>> + *
>> + * _HXG Request:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_REQUEST_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:16 | **DATA0** - request data (depends on ACTION) |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 15:0 | **ACTION** - requested action code |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | 1 | 31:0 | **DATA1** - optional data (depends on ACTION) |
>> + * +---+-------+--------------------------------------------------------------+
>> + * |...| | |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | n | 31:0 | **DATAn** - optional data (depends on ACTION) |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_REQUEST_MSG_MIN_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_REQUEST_MSG_0_DATA0 (0xfff << 16)
>> +#define GUC_HXG_REQUEST_MSG_0_ACTION (0xffff << 0)
>> +#define GUC_HXG_REQUEST_MSG_n_DATAn (0xffffffff << 0)
>> +
>> +/**
>> + * DOC: HXG Event
>> + *
>> + * The `HXG Event`_ message should be used to initiate asynchronous activity
>> + * that does not involves immediate confirmation nor data.
>> + *
>> + * Format of @DATA0 and all @DATAn fields depends on the @ACTION code.
>> + *
>> + * .. _HXG Event:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_EVENT_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:16 | **DATA0** - event data (depends on ACTION) |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 15:0 | **ACTION** - event action code |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | 1 | 31:0 | **DATA1** - optional event data (depends on ACTION) |
>> + * +---+-------+--------------------------------------------------------------+
>> + * |...| | |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | n | 31:0 | **DATAn** - optional event data (depends on ACTION) |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_EVENT_MSG_MIN_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_EVENT_MSG_0_DATA0 (0xfff << 16)
>> +#define GUC_HXG_EVENT_MSG_0_ACTION (0xffff << 0)
>> +#define GUC_HXG_EVENT_MSG_n_DATAn (0xffffffff << 0)
>> +
>> +/**
>> + * DOC: HXG Busy
>> + *
>> + * The `HXG Busy`_ message may be used to acknowledge reception of the `HXG Request`_
>> + * message if the recipient expects that it processing will be longer than default
>> + * timeout.
>> + *
>> + * The @COUNTER field may be used as a progress indicator.
>> + *
>> + * .. _HXG Busy:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_NO_RESPONSE_BUSY_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:0 | **COUNTER** - progress indicator |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_BUSY_MSG_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_BUSY_MSG_0_COUNTER GUC_HXG_MSG_0_AUX
>> +
>> +/**
>> + * DOC: HXG Retry
>> + *
>> + * The `HXG Retry`_ message should be used by recipient to indicate that the
>> + * `HXG Request`_ message was dropped and it should be resent again.
>> + *
>> + * The @REASON field may be used to provide additional information.
>> + *
>> + * .. _HXG Retry:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_NO_RESPONSE_RETRY_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:0 | **REASON** - reason for retry |
>> + * | | | - _`GUC_HXG_RETRY_REASON_UNSPECIFIED` = 0 |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_RETRY_MSG_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_RETRY_MSG_0_REASON GUC_HXG_MSG_0_AUX
>> +#define GUC_HXG_RETRY_REASON_UNSPECIFIED 0u
>> +
>> +/**
>> + * DOC: HXG Failure
>> + *
>> + * The `HXG Failure`_ message shall be used as a reply to the `HXG Request`_
>> + * message that could not be processed due to an error.
>> + *
>> + * .. _HXG Failure:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_RESPONSE_FAILURE_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:16 | **HINT** - additional error hint |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 15:0 | **ERROR** - error/result code |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_FAILURE_MSG_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_FAILURE_MSG_0_HINT (0xfff << 16)
>> +#define GUC_HXG_FAILURE_MSG_0_ERROR (0xffff << 0)
>> +
>> +/**
>> + * DOC: HXG Response
>> + *
>> + * The `HXG Response`_ message SHALL be used as a reply to the `HXG Request`_
>> + * message that was successfully processed without an error.
>> + *
>> + * .. _HXG Response:
>> + *
>> + * +---+-------+--------------------------------------------------------------+
>> + * | | Bits | Description |
>> + * +===+=======+==============================================================+
>> + * | 0 | 31 | ORIGIN |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 30:28 | TYPE = GUC_HXG_TYPE_RESPONSE_SUCCESS_ |
>> + * | +-------+--------------------------------------------------------------+
>> + * | | 27:0 | **DATA0** - data (depends on ACTION from `HXG Request`_) |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | 1 | 31:0 | **DATA1** - data (depends on ACTION from `HXG Request`_) |
>> + * +---+-------+--------------------------------------------------------------+
>> + * |...| | |
>> + * +---+-------+--------------------------------------------------------------+
>> + * | n | 31:0 | **DATAn** - data (depends on ACTION from `HXG Request`_) |
>> + * +---+-------+--------------------------------------------------------------+
>> + */
>> +
>> +#define GUC_HXG_RESPONSE_MSG_MIN_LEN GUC_HXG_MSG_MIN_LEN
>> +#define GUC_HXG_RESPONSE_MSG_0_DATA0 GUC_HXG_MSG_0_AUX
>> +#define GUC_HXG_RESPONSE_MSG_n_DATAn (0xffffffff << 0)
>> +
>> +/* deprecated */
>> #define INTEL_GUC_MSG_TYPE_SHIFT 28
>> #define INTEL_GUC_MSG_TYPE_MASK (0xF << INTEL_GUC_MSG_TYPE_SHIFT)
>> #define INTEL_GUC_MSG_DATA_SHIFT 16
>> --
>> 2.28.0
>>
>
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