| /* 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 */ |
