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/* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) */
/* Copyright(c) 2015 - 2020 Intel Corporation */
#ifndef ADF_PF2VF_MSG_H
#define ADF_PF2VF_MSG_H
/*
* PF<->VF Messaging
* The PF has an array of 32-bit PF2VF registers, one for each VF. The
* PF can access all these registers; each VF can access only the one
* register associated with that particular VF.
*
* The register functionally is split into two parts:
* The bottom half is for PF->VF messages. In particular when the first
* bit of this register (bit 0) gets set an interrupt will be triggered
* in the respective VF.
* The top half is for VF->PF messages. In particular when the first bit
* of this half of register (bit 16) gets set an interrupt will be triggered
* in the PF.
*
* The remaining bits within this register are available to encode messages.
* and implement a collision control mechanism to prevent concurrent use of
* the PF2VF register by both the PF and VF.
*
* 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
* _______________________________________________
* | | | | | | | | | | | | | | | | |
* +-----------------------------------------------+
* \___________________________/ \_________/ ^ ^
* ^ ^ | |
* | | | VF2PF Int
* | | Message Origin
* | Message Type
* Message-specific Data/Reserved
*
* 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
* _______________________________________________
* | | | | | | | | | | | | | | | | |
* +-----------------------------------------------+
* \___________________________/ \_________/ ^ ^
* ^ ^ | |
* | | | PF2VF Int
* | | Message Origin
* | Message Type
* Message-specific Data/Reserved
*
* Message Origin (Should always be 1)
* A legacy out-of-tree QAT driver allowed for a set of messages not supported
* by this driver; these had a Msg Origin of 0 and are ignored by this driver.
*
* When a PF or VF attempts to send a message in the lower or upper 16 bits,
* respectively, the other 16 bits are written to first with a defined
* IN_USE_BY pattern as part of a collision control scheme (see adf_iov_putmsg).
*/
#define ADF_PFVF_COMPATIBILITY_VERSION 0x1 /* PF<->VF compat */
/* PF->VF messages */
#define ADF_PF2VF_INT BIT(0)
#define ADF_PF2VF_MSGORIGIN_SYSTEM BIT(1)
#define ADF_PF2VF_MSGTYPE_MASK 0x0000003C
#define ADF_PF2VF_MSGTYPE_SHIFT 2
#define ADF_PF2VF_MSGTYPE_RESTARTING 0x01
#define ADF_PF2VF_MSGTYPE_VERSION_RESP 0x02
#define ADF_PF2VF_IN_USE_BY_PF 0x6AC20000
#define ADF_PF2VF_IN_USE_BY_PF_MASK 0xFFFE0000
/* PF->VF Version Response */
#define ADF_PF2VF_VERSION_RESP_VERS_MASK 0x00003FC0
#define ADF_PF2VF_VERSION_RESP_VERS_SHIFT 6
#define ADF_PF2VF_VERSION_RESP_RESULT_MASK 0x0000C000
#define ADF_PF2VF_VERSION_RESP_RESULT_SHIFT 14
#define ADF_PF2VF_MINORVERSION_SHIFT 6
#define ADF_PF2VF_MAJORVERSION_SHIFT 10
#define ADF_PF2VF_VF_COMPATIBLE 1
#define ADF_PF2VF_VF_INCOMPATIBLE 2
#define ADF_PF2VF_VF_COMPAT_UNKNOWN 3
/* VF->PF messages */
#define ADF_VF2PF_IN_USE_BY_VF 0x00006AC2
#define ADF_VF2PF_IN_USE_BY_VF_MASK 0x0000FFFE
#define ADF_VF2PF_INT BIT(16)
#define ADF_VF2PF_MSGORIGIN_SYSTEM BIT(17)
#define ADF_VF2PF_MSGTYPE_MASK 0x003C0000
#define ADF_VF2PF_MSGTYPE_SHIFT 18
#define ADF_VF2PF_MSGTYPE_INIT 0x3
#define ADF_VF2PF_MSGTYPE_SHUTDOWN 0x4
#define ADF_VF2PF_MSGTYPE_VERSION_REQ 0x5
#define ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ 0x6
/* VF->PF Compatible Version Request */
#define ADF_VF2PF_COMPAT_VER_REQ_SHIFT 22
/* Collision detection */
#define ADF_IOV_MSG_COLLISION_DETECT_DELAY 10
#define ADF_IOV_MSG_ACK_DELAY 2
#define ADF_IOV_MSG_ACK_MAX_RETRY 100
#define ADF_IOV_MSG_RETRY_DELAY 5
#define ADF_IOV_MSG_MAX_RETRIES 3
#define ADF_IOV_MSG_RESP_TIMEOUT (ADF_IOV_MSG_ACK_DELAY * \
ADF_IOV_MSG_ACK_MAX_RETRY + \
ADF_IOV_MSG_COLLISION_DETECT_DELAY)
#endif /* ADF_IOV_MSG_H */
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