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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 */ |