435 lines
14 KiB
C
435 lines
14 KiB
C
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/*
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* VMware PVSCSI header file
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*
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* Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2 of the License and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained by: Arvind Kumar <arvindkumar@vmware.com>
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*
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*/
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#ifndef VMW_PVSCSI_H
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#define VMW_PVSCSI_H
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#define VMW_PAGE_SIZE (4096)
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#define VMW_PAGE_SHIFT (12)
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#define MASK(n) ((1 << (n)) - 1) /* make an n-bit mask */
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/*
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* host adapter status/error codes
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*/
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enum HostBusAdapterStatus {
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BTSTAT_SUCCESS = 0x00, /* CCB complete normally with no errors */
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BTSTAT_LINKED_COMMAND_COMPLETED = 0x0a,
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BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG = 0x0b,
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BTSTAT_DATA_UNDERRUN = 0x0c,
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BTSTAT_SELTIMEO = 0x11, /* SCSI selection timeout */
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BTSTAT_DATARUN = 0x12, /* data overrun/underrun */
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BTSTAT_BUSFREE = 0x13, /* unexpected bus free */
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BTSTAT_INVPHASE = 0x14, /* invalid bus phase or sequence */
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/* requested by target */
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BTSTAT_LUNMISMATCH = 0x17, /* linked CCB has different LUN */
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/* from first CCB */
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BTSTAT_SENSFAILED = 0x1b, /* auto request sense failed */
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BTSTAT_TAGREJECT = 0x1c, /* SCSI II tagged queueing message */
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/* rejected by target */
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BTSTAT_BADMSG = 0x1d, /* unsupported message received by */
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/* the host adapter */
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BTSTAT_HAHARDWARE = 0x20, /* host adapter hardware failed */
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BTSTAT_NORESPONSE = 0x21, /* target did not respond to SCSI ATN, */
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/* sent a SCSI RST */
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BTSTAT_SENTRST = 0x22, /* host adapter asserted a SCSI RST */
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BTSTAT_RECVRST = 0x23, /* other SCSI devices asserted a SCSI RST */
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BTSTAT_DISCONNECT = 0x24, /* target device reconnected improperly */
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/* (w/o tag) */
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BTSTAT_BUSRESET = 0x25, /* host adapter issued BUS device reset */
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BTSTAT_ABORTQUEUE = 0x26, /* abort queue generated */
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BTSTAT_HASOFTWARE = 0x27, /* host adapter software error */
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BTSTAT_HATIMEOUT = 0x30, /* host adapter hardware timeout error */
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BTSTAT_SCSIPARITY = 0x34, /* SCSI parity error detected */
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};
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/*
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* Register offsets.
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*
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* These registers are accessible both via i/o space and mm i/o.
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*/
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enum PVSCSIRegOffset {
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PVSCSI_REG_OFFSET_COMMAND = 0x0,
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PVSCSI_REG_OFFSET_COMMAND_DATA = 0x4,
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PVSCSI_REG_OFFSET_COMMAND_STATUS = 0x8,
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PVSCSI_REG_OFFSET_LAST_STS_0 = 0x100,
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PVSCSI_REG_OFFSET_LAST_STS_1 = 0x104,
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PVSCSI_REG_OFFSET_LAST_STS_2 = 0x108,
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PVSCSI_REG_OFFSET_LAST_STS_3 = 0x10c,
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PVSCSI_REG_OFFSET_INTR_STATUS = 0x100c,
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PVSCSI_REG_OFFSET_INTR_MASK = 0x2010,
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PVSCSI_REG_OFFSET_KICK_NON_RW_IO = 0x3014,
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PVSCSI_REG_OFFSET_DEBUG = 0x3018,
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PVSCSI_REG_OFFSET_KICK_RW_IO = 0x4018,
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};
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/*
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* Virtual h/w commands.
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*/
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enum PVSCSICommands {
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PVSCSI_CMD_FIRST = 0, /* has to be first */
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PVSCSI_CMD_ADAPTER_RESET = 1,
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PVSCSI_CMD_ISSUE_SCSI = 2,
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PVSCSI_CMD_SETUP_RINGS = 3,
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PVSCSI_CMD_RESET_BUS = 4,
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PVSCSI_CMD_RESET_DEVICE = 5,
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PVSCSI_CMD_ABORT_CMD = 6,
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PVSCSI_CMD_CONFIG = 7,
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PVSCSI_CMD_SETUP_MSG_RING = 8,
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PVSCSI_CMD_DEVICE_UNPLUG = 9,
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PVSCSI_CMD_LAST = 10 /* has to be last */
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};
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#define PVSCSI_COMMAND_PROCESSING_SUCCEEDED (0)
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#define PVSCSI_COMMAND_PROCESSING_FAILED (-1)
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#define PVSCSI_COMMAND_NOT_ENOUGH_DATA (-2)
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/*
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* Command descriptor for PVSCSI_CMD_RESET_DEVICE --
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*/
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struct PVSCSICmdDescResetDevice {
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uint32_t target;
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uint8_t lun[8];
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} QEMU_PACKED;
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typedef struct PVSCSICmdDescResetDevice PVSCSICmdDescResetDevice;
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/*
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* Command descriptor for PVSCSI_CMD_ABORT_CMD --
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*
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* - currently does not support specifying the LUN.
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* - pad should be 0.
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*/
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struct PVSCSICmdDescAbortCmd {
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uint64_t context;
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uint32_t target;
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uint32_t pad;
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} QEMU_PACKED;
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typedef struct PVSCSICmdDescAbortCmd PVSCSICmdDescAbortCmd;
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/*
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* Command descriptor for PVSCSI_CMD_SETUP_RINGS --
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*
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* Notes:
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* - reqRingNumPages and cmpRingNumPages need to be power of two.
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* - reqRingNumPages and cmpRingNumPages need to be different from 0,
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* - reqRingNumPages and cmpRingNumPages need to be inferior to
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* PVSCSI_SETUP_RINGS_MAX_NUM_PAGES.
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*/
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#define PVSCSI_SETUP_RINGS_MAX_NUM_PAGES 32
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struct PVSCSICmdDescSetupRings {
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uint32_t reqRingNumPages;
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uint32_t cmpRingNumPages;
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uint64_t ringsStatePPN;
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uint64_t reqRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES];
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uint64_t cmpRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES];
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} QEMU_PACKED;
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typedef struct PVSCSICmdDescSetupRings PVSCSICmdDescSetupRings;
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/*
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* Command descriptor for PVSCSI_CMD_SETUP_MSG_RING --
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*
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* Notes:
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* - this command was not supported in the initial revision of the h/w
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* interface. Before using it, you need to check that it is supported by
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* writing PVSCSI_CMD_SETUP_MSG_RING to the 'command' register, then
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* immediately after read the 'command status' register:
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* * a value of -1 means that the cmd is NOT supported,
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* * a value != -1 means that the cmd IS supported.
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* If it's supported the 'command status' register should return:
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* sizeof(PVSCSICmdDescSetupMsgRing) / sizeof(uint32_t).
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* - this command should be issued _after_ the usual SETUP_RINGS so that the
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* RingsState page is already setup. If not, the command is a nop.
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* - numPages needs to be a power of two,
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* - numPages needs to be different from 0,
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* - pad should be zero.
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*/
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#define PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES 16
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struct PVSCSICmdDescSetupMsgRing {
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uint32_t numPages;
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uint32_t pad;
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uint64_t ringPPNs[PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES];
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} QEMU_PACKED;
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typedef struct PVSCSICmdDescSetupMsgRing PVSCSICmdDescSetupMsgRing;
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enum PVSCSIMsgType {
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PVSCSI_MSG_DEV_ADDED = 0,
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PVSCSI_MSG_DEV_REMOVED = 1,
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PVSCSI_MSG_LAST = 2,
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};
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/*
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* Msg descriptor.
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*
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* sizeof(struct PVSCSIRingMsgDesc) == 128.
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*
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* - type is of type enum PVSCSIMsgType.
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* - the content of args depend on the type of event being delivered.
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*/
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struct PVSCSIRingMsgDesc {
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uint32_t type;
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uint32_t args[31];
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} QEMU_PACKED;
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typedef struct PVSCSIRingMsgDesc PVSCSIRingMsgDesc;
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struct PVSCSIMsgDescDevStatusChanged {
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uint32_t type; /* PVSCSI_MSG_DEV _ADDED / _REMOVED */
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uint32_t bus;
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uint32_t target;
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uint8_t lun[8];
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uint32_t pad[27];
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} QEMU_PACKED;
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typedef struct PVSCSIMsgDescDevStatusChanged PVSCSIMsgDescDevStatusChanged;
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/*
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* Rings state.
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*
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* - the fields:
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* . msgProdIdx,
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* . msgConsIdx,
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* . msgNumEntriesLog2,
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* .. are only used once the SETUP_MSG_RING cmd has been issued.
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* - 'pad' helps to ensure that the msg related fields are on their own
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* cache-line.
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*/
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struct PVSCSIRingsState {
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uint32_t reqProdIdx;
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uint32_t reqConsIdx;
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uint32_t reqNumEntriesLog2;
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uint32_t cmpProdIdx;
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uint32_t cmpConsIdx;
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uint32_t cmpNumEntriesLog2;
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uint8_t pad[104];
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uint32_t msgProdIdx;
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uint32_t msgConsIdx;
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uint32_t msgNumEntriesLog2;
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} QEMU_PACKED;
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typedef struct PVSCSIRingsState PVSCSIRingsState;
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/*
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* Request descriptor.
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*
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* sizeof(RingReqDesc) = 128
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*
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* - context: is a unique identifier of a command. It could normally be any
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* 64bit value, however we currently store it in the serialNumber variable
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* of struct SCSI_Command, so we have the following restrictions due to the
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* way this field is handled in the vmkernel storage stack:
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* * this value can't be 0,
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* * the upper 32bit need to be 0 since serialNumber is as a uint32_t.
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* Currently tracked as PR 292060.
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* - dataLen: contains the total number of bytes that need to be transferred.
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* - dataAddr:
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* * if PVSCSI_FLAG_CMD_WITH_SG_LIST is set: dataAddr is the PA of the first
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* s/g table segment, each s/g segment is entirely contained on a single
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* page of physical memory,
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* * if PVSCSI_FLAG_CMD_WITH_SG_LIST is NOT set, then dataAddr is the PA of
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* the buffer used for the DMA transfer,
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* - flags:
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* * PVSCSI_FLAG_CMD_WITH_SG_LIST: see dataAddr above,
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* * PVSCSI_FLAG_CMD_DIR_NONE: no DMA involved,
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* * PVSCSI_FLAG_CMD_DIR_TOHOST: transfer from device to main memory,
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* * PVSCSI_FLAG_CMD_DIR_TODEVICE: transfer from main memory to device,
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* * PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB: reserved to handle CDBs larger than
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* 16bytes. To be specified.
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* - vcpuHint: vcpuId of the processor that will be most likely waiting for the
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* completion of the i/o. For guest OSes that use lowest priority message
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* delivery mode (such as windows), we use this "hint" to deliver the
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* completion action to the proper vcpu. For now, we can use the vcpuId of
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* the processor that initiated the i/o as a likely candidate for the vcpu
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* that will be waiting for the completion..
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* - bus should be 0: we currently only support bus 0 for now.
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* - unused should be zero'd.
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*/
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#define PVSCSI_FLAG_CMD_WITH_SG_LIST (1 << 0)
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#define PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB (1 << 1)
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#define PVSCSI_FLAG_CMD_DIR_NONE (1 << 2)
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#define PVSCSI_FLAG_CMD_DIR_TOHOST (1 << 3)
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#define PVSCSI_FLAG_CMD_DIR_TODEVICE (1 << 4)
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#define PVSCSI_KNOWN_FLAGS \
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(PVSCSI_FLAG_CMD_WITH_SG_LIST | \
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PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB | \
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PVSCSI_FLAG_CMD_DIR_NONE | \
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PVSCSI_FLAG_CMD_DIR_TOHOST | \
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PVSCSI_FLAG_CMD_DIR_TODEVICE)
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struct PVSCSIRingReqDesc {
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uint64_t context;
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uint64_t dataAddr;
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uint64_t dataLen;
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uint64_t senseAddr;
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uint32_t senseLen;
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uint32_t flags;
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uint8_t cdb[16];
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uint8_t cdbLen;
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uint8_t lun[8];
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uint8_t tag;
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uint8_t bus;
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uint8_t target;
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uint8_t vcpuHint;
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uint8_t unused[59];
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} QEMU_PACKED;
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typedef struct PVSCSIRingReqDesc PVSCSIRingReqDesc;
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/*
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* Scatter-gather list management.
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*
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* As described above, when PVSCSI_FLAG_CMD_WITH_SG_LIST is set in the
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* RingReqDesc.flags, then RingReqDesc.dataAddr is the PA of the first s/g
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* table segment.
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*
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* - each segment of the s/g table contain a succession of struct
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* PVSCSISGElement.
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* - each segment is entirely contained on a single physical page of memory.
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* - a "chain" s/g element has the flag PVSCSI_SGE_FLAG_CHAIN_ELEMENT set in
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* PVSCSISGElement.flags and in this case:
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* * addr is the PA of the next s/g segment,
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* * length is undefined, assumed to be 0.
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*/
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struct PVSCSISGElement {
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uint64_t addr;
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uint32_t length;
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uint32_t flags;
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} QEMU_PACKED;
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typedef struct PVSCSISGElement PVSCSISGElement;
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/*
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* Completion descriptor.
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*
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* sizeof(RingCmpDesc) = 32
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*
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* - context: identifier of the command. The same thing that was specified
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* 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 {
|
||
|
|
uint64_t context;
|
||
|
|
uint64_t dataLen;
|
||
|
|
uint32_t senseLen;
|
||
|
|
uint16_t hostStatus;
|
||
|
|
uint16_t scsiStatus;
|
||
|
|
uint32_t pad[2];
|
||
|
|
} QEMU_PACKED;
|
||
|
|
|
||
|
|
typedef struct PVSCSIRingCmpDesc PVSCSIRingCmpDesc;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Enumeration of supported MSI-X vectors
|
||
|
|
*/
|
||
|
|
#define PVSCSI_VECTOR_COMPLETION 0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 \
|
||
|
|
(VMW_PAGE_SIZE / sizeof(struct PVSCSIRingReqDesc))
|
||
|
|
|
||
|
|
#define PVSCSI_MAX_NUM_CMP_ENTRIES_PER_PAGE \
|
||
|
|
(VMW_PAGE_SIZE / sizeof(PVSCSIRingCmpDesc))
|
||
|
|
|
||
|
|
#define PVSCSI_MAX_NUM_MSG_ENTRIES_PER_PAGE \
|
||
|
|
(VMW_PAGE_SIZE / sizeof(PVSCSIRingMsgDesc))
|
||
|
|
|
||
|
|
#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 * VMW_PAGE_SIZE)
|
||
|
|
|
||
|
|
#endif /* VMW_PVSCSI_H */
|