Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 461 insertions, 0 deletions

diff --git a/drivers/scsi/vmw_pvscsi.h b/drivers/scsi/vmw_pvscsi.h
new file mode 100644
index 000000000..9d16cf925
--- /dev/null
+++ b/drivers/scsi/vmw_pvscsi.h
@@ -0,0 +1,461 @@
+/*
+ * 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_ */