Skip to content

Commit

Permalink
drm/i915/guc: Introduce unified HXG messages
Browse files Browse the repository at this point in the history 
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: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210616001302.84233-2-matthew.brost@intel.com
  • Loading branch information
Michal Wajdeczko authored and Matt Roper committed Jun 18, 2021
1 parent 22916ba commit 088b4d4
Showing 1 changed file with 213 additions and 0 deletions.
213 changes: 213 additions & 0 deletions drivers/gpu/drm/i915/gt/uc/abi/guc_messages_abi.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,219 @@
#ifndef _ABI_GUC_MESSAGES_ABI_H
#define _ABI_GUC_MESSAGES_ABI_H

/**
* DOC: HXG Message
*
* All messages exchanged with GuC are defined using 32 bit dwords.
* First dword is treated as a message header. Remaining dwords are optional.
*
* +---+-------+--------------------------------------------------------------+
* | | 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 on TYPE) |
* +---+-------+--------------------------------------------------------------+
* | 1 | 31:0 | |
* +---+-------+ |
* |...| | **PAYLOAD** - 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)
#define GUC_HXG_MSG_n_PAYLOAD (0xffffffff << 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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 | |
* +---+-------+ |
* |...| | **DATAn** - optional data (depends on ACTION) |
* +---+-------+ |
* | n | 31:0 | |
* +---+-------+--------------------------------------------------------------+
*/

#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 GUC_HXG_MSG_n_PAYLOAD

/**
* 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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 | |
* +---+-------+ |
* |...| | **DATAn** - optional event data (depends on ACTION) |
* +---+-------+ |
* | n | 31:0 | |
* +---+-------+--------------------------------------------------------------+
*/

#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 GUC_HXG_MSG_n_PAYLOAD

/**
* 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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.
*
* +---+-------+--------------------------------------------------------------+
* | | 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 | |
* +---+-------+ |
* |...| | **DATAn** - data (depends on ACTION from `HXG Request`_) |
* +---+-------+ |
* | n | 31:0 | |
* +---+-------+--------------------------------------------------------------+
*/

#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 GUC_HXG_MSG_n_PAYLOAD

/* 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
Expand Down

0 comments on commit 088b4d4

Please sign in to comment.