/* * VMware PVSCSI header file * * Copyright (C) 2008-2014, VMware, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; version 2 of the License and no later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * */ #ifndef _VMW_PVSCSI_H_ #define _VMW_PVSCSI_H_ #include <linux/types.h> #define PVSCSI_DRIVER_VERSION_STRING "1.0.7.0-k" #define PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT 128 #define MASK(n) ((1 << (n)) - 1) /* make an n-bit mask */ #define PCI_DEVICE_ID_VMWARE_PVSCSI 0x07C0 /* * host adapter status/error codes */ enum HostBusAdapterStatus { BTSTAT_SUCCESS = 0x00, /* CCB complete normally with no errors */ BTSTAT_LINKED_COMMAND_COMPLETED = 0x0a, BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG = 0x0b, BTSTAT_DATA_UNDERRUN = 0x0c, BTSTAT_SELTIMEO = 0x11, /* SCSI selection timeout */ BTSTAT_DATARUN = 0x12, /* data overrun/underrun */ BTSTAT_BUSFREE = 0x13, /* unexpected bus free */ BTSTAT_INVPHASE = 0x14, /* invalid bus phase or sequence * requested by target */ BTSTAT_LUNMISMATCH = 0x17, /* linked CCB has different LUN from * first CCB */ BTSTAT_INVPARAM = 0x1a, /* invalid parameter in CCB or segment * list */ BTSTAT_SENSFAILED = 0x1b, /* auto request sense failed */ BTSTAT_TAGREJECT = 0x1c, /* SCSI II tagged queueing message * rejected by target */ BTSTAT_BADMSG = 0x1d, /* unsupported message received by the * host adapter */ BTSTAT_HAHARDWARE = 0x20, /* host adapter hardware failed */ BTSTAT_NORESPONSE = 0x21, /* target did not respond to SCSI ATN, * sent a SCSI RST */ BTSTAT_SENTRST = 0x22, /* host adapter asserted a SCSI RST */ BTSTAT_RECVRST = 0x23, /* other SCSI devices asserted a SCSI * RST */ BTSTAT_DISCONNECT = 0x24, /* target device reconnected improperly * (w/o tag) */ BTSTAT_BUSRESET = 0x25, /* host adapter issued BUS device reset */ BTSTAT_ABORTQUEUE = 0x26, /* abort queue generated */ BTSTAT_HASOFTWARE = 0x27, /* host adapter software error */ BTSTAT_HATIMEOUT = 0x30, /* host adapter hardware timeout error */ BTSTAT_SCSIPARITY = 0x34, /* SCSI parity error detected */ }; /* * SCSI device status values. */ enum ScsiDeviceStatus { SDSTAT_GOOD = 0x00, /* No errors. */ SDSTAT_CHECK = 0x02, /* Check condition. */ }; /* * Register offsets. * * These registers are accessible both via i/o space and mm i/o. */ enum PVSCSIRegOffset { PVSCSI_REG_OFFSET_COMMAND = 0x0, PVSCSI_REG_OFFSET_COMMAND_DATA = 0x4, PVSCSI_REG_OFFSET_COMMAND_STATUS = 0x8, PVSCSI_REG_OFFSET_LAST_STS_0 = 0x100, PVSCSI_REG_OFFSET_LAST_STS_1 = 0x104, PVSCSI_REG_OFFSET_LAST_STS_2 = 0x108, PVSCSI_REG_OFFSET_LAST_STS_3 = 0x10c, PVSCSI_REG_OFFSET_INTR_STATUS = 0x100c, PVSCSI_REG_OFFSET_INTR_MASK = 0x2010, PVSCSI_REG_OFFSET_KICK_NON_RW_IO = 0x3014, PVSCSI_REG_OFFSET_DEBUG = 0x3018, PVSCSI_REG_OFFSET_KICK_RW_IO = 0x4018, }; /* * Virtual h/w commands. */ enum PVSCSICommands { PVSCSI_CMD_FIRST = 0, /* has to be first */ PVSCSI_CMD_ADAPTER_RESET = 1, PVSCSI_CMD_ISSUE_SCSI = 2, PVSCSI_CMD_SETUP_RINGS = 3, PVSCSI_CMD_RESET_BUS = 4, PVSCSI_CMD_RESET_DEVICE = 5, PVSCSI_CMD_ABORT_CMD = 6, PVSCSI_CMD_CONFIG = 7, PVSCSI_CMD_SETUP_MSG_RING = 8, PVSCSI_CMD_DEVICE_UNPLUG = 9, PVSCSI_CMD_SETUP_REQCALLTHRESHOLD = 10, PVSCSI_CMD_LAST = 11 /* has to be last */ }; /* * Command descriptor for PVSCSI_CMD_RESET_DEVICE -- */ struct PVSCSICmdDescResetDevice { u32 target; u8 lun[8]; } __packed; /* * Command descriptor for PVSCSI_CMD_CONFIG -- */ struct PVSCSICmdDescConfigCmd { u64 cmpAddr; u64 configPageAddress; u32 configPageNum; u32 _pad; } __packed; /* * Command descriptor for PVSCSI_CMD_SETUP_REQCALLTHRESHOLD -- */ struct PVSCSICmdDescSetupReqCall { u32 enable; } __packed; enum PVSCSIConfigPageType { PVSCSI_CONFIG_PAGE_CONTROLLER = 0x1958, PVSCSI_CONFIG_PAGE_PHY = 0x1959, PVSCSI_CONFIG_PAGE_DEVICE = 0x195a, }; enum PVSCSIConfigPageAddressType { PVSCSI_CONFIG_CONTROLLER_ADDRESS = 0x2120, PVSCSI_CONFIG_BUSTARGET_ADDRESS = 0x2121, PVSCSI_CONFIG_PHY_ADDRESS = 0x2122, }; /* * Command descriptor for PVSCSI_CMD_ABORT_CMD -- * * - currently does not support specifying the LUN. * - _pad should be 0. */ struct PVSCSICmdDescAbortCmd { u64 context; u32 target; u32 _pad; } __packed; /* * Command descriptor for PVSCSI_CMD_SETUP_RINGS -- * * Notes: * - reqRingNumPages and cmpRingNumPages need to be power of two. * - reqRingNumPages and cmpRingNumPages need to be different from 0, * - reqRingNumPages and cmpRingNumPages need to be inferior to * PVSCSI_SETUP_RINGS_MAX_NUM_PAGES. */ #define PVSCSI_SETUP_RINGS_MAX_NUM_PAGES 32 struct PVSCSICmdDescSetupRings { u32 reqRingNumPages; u32 cmpRingNumPages; u64 ringsStatePPN; u64 reqRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES]; u64 cmpRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES]; } __packed; /* * Command descriptor for PVSCSI_CMD_SETUP_MSG_RING -- * * Notes: * - this command was not supported in the initial revision of the h/w * interface. Before using it, you need to check that it is supported by * writing PVSCSI_CMD_SETUP_MSG_RING to the 'command' register, then * immediately after read the 'command status' register: * * a value of -1 means that the cmd is NOT supported, * * a value != -1 means that the cmd IS supported. * If it's supported the 'command status' register should return: * sizeof(PVSCSICmdDescSetupMsgRing) / sizeof(u32). * - this command should be issued _after_ the usual SETUP_RINGS so that the * RingsState page is already setup. If not, the command is a nop. * - numPages needs to be a power of two, * - numPages needs to be different from 0, * - _pad should be zero. */ #define PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES 16 struct PVSCSICmdDescSetupMsgRing { u32 numPages; u32 _pad; u64 ringPPNs[PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES]; } __packed; enum PVSCSIMsgType { PVSCSI_MSG_DEV_ADDED = 0, PVSCSI_MSG_DEV_REMOVED = 1, PVSCSI_MSG_LAST = 2, }; /* * Msg descriptor. * * sizeof(struct PVSCSIRingMsgDesc) == 128. * * - type is of type enum PVSCSIMsgType. * - the content of args depend on the type of event being delivered. */ struct PVSCSIRingMsgDesc { u32 type; u32 args[31]; } __packed; struct PVSCSIMsgDescDevStatusChanged { u32 type; /* PVSCSI_MSG_DEV _ADDED / _REMOVED */ u32 bus; u32 target; u8 lun[8]; u32 pad[27]; } __packed; /* * Rings state. * * - the fields: * . msgProdIdx, * . msgConsIdx, * . msgNumEntriesLog2, * .. are only used once the SETUP_MSG_RING cmd has been issued. * - '_pad' helps to ensure that the msg related fields are on their own * cache-line. */ struct PVSCSIRingsState { u32 reqProdIdx; u32 reqConsIdx; u32 reqNumEntriesLog2; u32 cmpProdIdx; u32 cmpConsIdx; u32 cmpNumEntriesLog2; u32 reqCallThreshold; u8 _pad[100]; u32 msgProdIdx; u32 msgConsIdx; u32 msgNumEntriesLog2; } __packed; /* * Request descriptor. * * sizeof(RingReqDesc) = 128 * * - context: is a unique identifier of a command. It could normally be any * 64bit value, however we currently store it in the serialNumber variable * of struct SCSI_Command, so we have the following restrictions due to the * way this field is handled in the vmkernel storage stack: * * this value can't be 0, * * the upper 32bit need to be 0 since serialNumber is as a u32. * Currently tracked as PR 292060. * - dataLen: contains the total number of bytes that need to be transferred. * - dataAddr: * * if PVSCSI_FLAG_CMD_WITH_SG_LIST is set: dataAddr is the PA of the first * s/g table segment, each s/g segment is entirely contained on a single * page of physical memory, * * if PVSCSI_FLAG_CMD_WITH_SG_LIST is NOT set, then dataAddr is the PA of * the buffer used for the DMA transfer, * - flags: * * PVSCSI_FLAG_CMD_WITH_SG_LIST: see dataAddr above, * * PVSCSI_FLAG_CMD_DIR_NONE: no DMA involved, * * PVSCSI_FLAG_CMD_DIR_TOHOST: transfer from device to main memory, * * PVSCSI_FLAG_CMD_DIR_TODEVICE: transfer from main memory to device, * * PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB: reserved to handle CDBs larger than * 16bytes. To be specified. * - vcpuHint: vcpuId of the processor that will be most likely waiting for the * completion of the i/o. For guest OSes that use lowest priority message * delivery mode (such as windows), we use this "hint" to deliver the * completion action to the proper vcpu. For now, we can use the vcpuId of * the processor that initiated the i/o as a likely candidate for the vcpu * that will be waiting for the completion.. * - bus should be 0: we currently only support bus 0 for now. * - unused should be zero'd. */ #define PVSCSI_FLAG_CMD_WITH_SG_LIST (1 << 0) #define PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB (1 << 1) #define PVSCSI_FLAG_CMD_DIR_NONE (1 << 2) #define PVSCSI_FLAG_CMD_DIR_TOHOST (1 << 3) #define PVSCSI_FLAG_CMD_DIR_TODEVICE (1 << 4) struct PVSCSIRingReqDesc { u64 context; u64 dataAddr; u64 dataLen; u64 senseAddr; u32 senseLen; u32 flags; u8 cdb[16]; u8 cdbLen; u8 lun[8]; u8 tag; u8 bus; u8 target; u16 vcpuHint; u8 unused[58]; } __packed; /* * Scatter-gather list management. * * As described above, when PVSCSI_FLAG_CMD_WITH_SG_LIST is set in the * RingReqDesc.flags, then RingReqDesc.dataAddr is the PA of the first s/g * table segment. * * - each segment of the s/g table contain a succession of struct * PVSCSISGElement. * - each segment is entirely contained on a single physical page of memory. * - a "chain" s/g element has the flag PVSCSI_SGE_FLAG_CHAIN_ELEMENT set in * PVSCSISGElement.flags and in this case: * * addr is the PA of the next s/g segment, * * length is undefined, assumed to be 0. */ struct PVSCSISGElement { u64 addr; u32 length; u32 flags; } __packed; /* * Completion descriptor. * * sizeof(RingCmpDesc) = 32 * * - context: identifier of the command. The same thing that was specified * under "context" as part of struct RingReqDesc at initiation time, * - dataLen: number of bytes transferred for the actual i/o operation, * - senseLen: number of bytes written into the sense buffer, * - hostStatus: adapter status, * - scsiStatus: device status, * - _pad should be zero. */ struct PVSCSIRingCmpDesc { u64 context; u64 dataLen; u32 senseLen; u16 hostStatus; u16 scsiStatus; u32 _pad[2]; } __packed; struct PVSCSIConfigPageHeader { u32 pageNum; u16 numDwords; u16 hostStatus; u16 scsiStatus; u16 reserved[3]; } __packed; struct PVSCSIConfigPageController { struct PVSCSIConfigPageHeader header; u64 nodeWWN; /* Device name as defined in the SAS spec. */ u16 manufacturer[64]; u16 serialNumber[64]; u16 opromVersion[32]; u16 hwVersion[32]; u16 firmwareVersion[32]; u32 numPhys; u8 useConsecutivePhyWWNs; u8 reserved[3]; } __packed; /* * Interrupt status / IRQ bits. */ #define PVSCSI_INTR_CMPL_0 (1 << 0) #define PVSCSI_INTR_CMPL_1 (1 << 1) #define PVSCSI_INTR_CMPL_MASK MASK(2) #define PVSCSI_INTR_MSG_0 (1 << 2) #define PVSCSI_INTR_MSG_1 (1 << 3) #define PVSCSI_INTR_MSG_MASK (MASK(2) << 2) #define PVSCSI_INTR_ALL_SUPPORTED MASK(4) /* * Number of MSI-X vectors supported. */ #define PVSCSI_MAX_INTRS 24 /* * Misc constants for the rings. */ #define PVSCSI_MAX_NUM_PAGES_REQ_RING PVSCSI_SETUP_RINGS_MAX_NUM_PAGES #define PVSCSI_MAX_NUM_PAGES_CMP_RING PVSCSI_SETUP_RINGS_MAX_NUM_PAGES #define PVSCSI_MAX_NUM_PAGES_MSG_RING PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES #define PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE \ (PAGE_SIZE / sizeof(struct PVSCSIRingReqDesc)) #define PVSCSI_MAX_REQ_QUEUE_DEPTH \ (PVSCSI_MAX_NUM_PAGES_REQ_RING * PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE) #define PVSCSI_MEM_SPACE_COMMAND_NUM_PAGES 1 #define PVSCSI_MEM_SPACE_INTR_STATUS_NUM_PAGES 1 #define PVSCSI_MEM_SPACE_MISC_NUM_PAGES 2 #define PVSCSI_MEM_SPACE_KICK_IO_NUM_PAGES 2 #define PVSCSI_MEM_SPACE_MSIX_NUM_PAGES 2 enum PVSCSIMemSpace { PVSCSI_MEM_SPACE_COMMAND_PAGE = 0, PVSCSI_MEM_SPACE_INTR_STATUS_PAGE = 1, PVSCSI_MEM_SPACE_MISC_PAGE = 2, PVSCSI_MEM_SPACE_KICK_IO_PAGE = 4, PVSCSI_MEM_SPACE_MSIX_TABLE_PAGE = 6, PVSCSI_MEM_SPACE_MSIX_PBA_PAGE = 7, }; #define PVSCSI_MEM_SPACE_NUM_PAGES \ (PVSCSI_MEM_SPACE_COMMAND_NUM_PAGES + \ PVSCSI_MEM_SPACE_INTR_STATUS_NUM_PAGES + \ PVSCSI_MEM_SPACE_MISC_NUM_PAGES + \ PVSCSI_MEM_SPACE_KICK_IO_NUM_PAGES + \ PVSCSI_MEM_SPACE_MSIX_NUM_PAGES) #define PVSCSI_MEM_SPACE_SIZE (PVSCSI_MEM_SPACE_NUM_PAGES * PAGE_SIZE) #endif /* _VMW_PVSCSI_H_ */
