Merge remote-tracking branch 'bonzini/scsi-next' into staging

* bonzini/scsi-next:
  scsi: Fix transfer length for READ POSITION commands.
  scsi: Add basic support for SCSI media changer commands.
  scsi: Ensure command and transfer lengths are set for all SCSI devices
  scsi: Fix LOAD_UNLOAD
  scsi: Fix data length == SCSI_SENSE_BUF_SIZE
  virtio-scsi: do not crash on adding buffers to the event queue
  megasas: LSI Megaraid SAS HBA emulation
  megasas: Add header file
  ISCSI: force use of sg for SMC and SSC devices
  ISCSI: Add SCSI passthrough via scsi-generic to libiscsi
  scsi-disk: implement READ DISC INFORMATION
  atapi: implement READ DISC INFORMATION
  scsi: add a qdev property for the disk's WWN
  scsi: simplify handling of the VPD page length field

10 files changed, 3640 insertions, 37 deletions

diff --git a/hw/Makefile.objs b/hw/Makefile.objs
index 3d7725934f..9a350deafb 100644
--- a/hw/Makefile.objs
+++ b/hw/Makefile.objs
@@ -86,6 +86,7 @@ hw-obj-$(CONFIG_OPENCORES_ETH) += opencores_eth.o
 
 # SCSI layer
 hw-obj-$(CONFIG_LSI_SCSI_PCI) += lsi53c895a.o
+hw-obj-$(CONFIG_MEGASAS_SCSI_PCI) += megasas.o
 hw-obj-$(CONFIG_ESP) += esp.o
 
 hw-obj-y += sysbus.o isa-bus.o
diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
index 5919cf52d8..f7f714c726 100644
--- a/hw/ide/atapi.c
+++ b/hw/ide/atapi.c
@@ -956,6 +956,36 @@ static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf)
     ide_atapi_cmd_reply(s, 8, 8);
 }
 
+static void cmd_read_disc_information(IDEState *s, uint8_t* buf)
+{
+    uint8_t type = buf[1] & 7;
+    uint32_t max_len = ube16_to_cpu(buf + 7);
+
+    /* Types 1/2 are only defined for Blu-Ray.  */
+    if (type != 0) {
+        ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
+                            ASC_INV_FIELD_IN_CMD_PACKET);
+        return;
+    }
+
+    memset(buf, 0, 34);
+    buf[1] = 32;
+    buf[2] = 0xe; /* last session complete, disc finalized */
+    buf[3] = 1;   /* first track on disc */
+    buf[4] = 1;   /* # of sessions */
+    buf[5] = 1;   /* first track of last session */
+    buf[6] = 1;   /* last track of last session */
+    buf[7] = 0x20; /* unrestricted use */
+    buf[8] = 0x00; /* CD-ROM or DVD-ROM */
+    /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
+    /* 12-23: not meaningful for CD-ROM or DVD-ROM */
+    /* 24-31: disc bar code */
+    /* 32: disc application code */
+    /* 33: number of OPC tables */
+
+    ide_atapi_cmd_reply(s, 34, max_len);
+}
+
 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf)
 {
     int max_len;
@@ -1045,6 +1075,7 @@ static const struct {
     [ 0x43 ] = { cmd_read_toc_pma_atip,             CHECK_READY },
     [ 0x46 ] = { cmd_get_configuration,             ALLOW_UA },
     [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },
+    [ 0x51 ] = { cmd_read_disc_information,         CHECK_READY },
     [ 0x5a ] = { cmd_mode_sense, /* (10) */         0 },
     [ 0xa8 ] = { cmd_read, /* (12) */               CHECK_READY },
     [ 0xad ] = { cmd_read_dvd_structure,            CHECK_READY },
diff --git a/hw/megasas.c b/hw/megasas.c
new file mode 100644
index 0000000000..b48836fff1
--- /dev/null
+++ b/hw/megasas.c
@@ -0,0 +1,2198 @@
+/*
+ * QEMU MegaRAID SAS 8708EM2 Host Bus Adapter emulation
+ * Based on the linux driver code at drivers/scsi/megaraid
+ *
+ * Copyright (c) 2009-2012 Hannes Reinecke, SUSE Labs
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw.h"
+#include "pci.h"
+#include "dma.h"
+#include "msix.h"
+#include "iov.h"
+#include "scsi.h"
+#include "scsi-defs.h"
+#include "block_int.h"
+#include "trace.h"
+
+#include "mfi.h"
+
+#define MEGASAS_VERSION "1.70"
+#define MEGASAS_MAX_FRAMES 2048         /* Firmware limit at 65535 */
+#define MEGASAS_DEFAULT_FRAMES 1000     /* Windows requires this */
+#define MEGASAS_MAX_SGE 128             /* Firmware limit */
+#define MEGASAS_DEFAULT_SGE 80
+#define MEGASAS_MAX_SECTORS 0xFFFF      /* No real limit */
+#define MEGASAS_MAX_ARRAYS 128
+
+#define MEGASAS_FLAG_USE_JBOD      0
+#define MEGASAS_MASK_USE_JBOD      (1 << MEGASAS_FLAG_USE_JBOD)
+#define MEGASAS_FLAG_USE_MSIX      1
+#define MEGASAS_MASK_USE_MSIX      (1 << MEGASAS_FLAG_USE_MSIX)
+#define MEGASAS_FLAG_USE_QUEUE64   2
+#define MEGASAS_MASK_USE_QUEUE64   (1 << MEGASAS_FLAG_USE_QUEUE64)
+
+const char *mfi_frame_desc[] = {
+    "MFI init", "LD Read", "LD Write", "LD SCSI", "PD SCSI",
+    "MFI Doorbell", "MFI Abort", "MFI SMP", "MFI Stop"};
+
+typedef struct MegasasCmd {
+    uint32_t index;
+    uint16_t flags;
+    uint16_t count;
+    uint64_t context;
+
+    target_phys_addr_t pa;
+    target_phys_addr_t pa_size;
+    union mfi_frame *frame;
+    SCSIRequest *req;
+    QEMUSGList qsg;
+    void *iov_buf;
+    size_t iov_size;
+    size_t iov_offset;
+    struct MegasasState *state;
+} MegasasCmd;
+
+typedef struct MegasasState {
+    PCIDevice dev;
+    MemoryRegion mmio_io;
+    MemoryRegion port_io;
+    MemoryRegion queue_io;
+    uint32_t frame_hi;
+
+    int fw_state;
+    uint32_t fw_sge;
+    uint32_t fw_cmds;
+    uint32_t flags;
+    int fw_luns;
+    int intr_mask;
+    int doorbell;
+    int busy;
+
+    MegasasCmd *event_cmd;
+    int event_locale;
+    int event_class;
+    int event_count;
+    int shutdown_event;
+    int boot_event;
+
+    uint64_t reply_queue_pa;
+    void *reply_queue;
+    int reply_queue_len;
+    int reply_queue_head;
+    int reply_queue_tail;
+    uint64_t consumer_pa;
+    uint64_t producer_pa;
+
+    MegasasCmd frames[MEGASAS_MAX_FRAMES];
+
+    SCSIBus bus;
+} MegasasState;
+
+#define MEGASAS_INTR_DISABLED_MASK 0xFFFFFFFF
+
+static bool megasas_intr_enabled(MegasasState *s)
+{
+    if ((s->intr_mask & MEGASAS_INTR_DISABLED_MASK) !=
+        MEGASAS_INTR_DISABLED_MASK) {
+        return true;
+    }
+    return false;
+}
+
+static bool megasas_use_queue64(MegasasState *s)
+{
+    return s->flags & MEGASAS_MASK_USE_QUEUE64;
+}
+
+static bool megasas_use_msix(MegasasState *s)
+{
+    return s->flags & MEGASAS_MASK_USE_MSIX;
+}
+
+static bool megasas_is_jbod(MegasasState *s)
+{
+    return s->flags & MEGASAS_MASK_USE_JBOD;
+}
+
+static void megasas_frame_set_cmd_status(unsigned long frame, uint8_t v)
+{
+    stb_phys(frame + offsetof(struct mfi_frame_header, cmd_status), v);
+}
+
+static void megasas_frame_set_scsi_status(unsigned long frame, uint8_t v)
+{
+    stb_phys(frame + offsetof(struct mfi_frame_header, scsi_status), v);
+}
+
+/*
+ * Context is considered opaque, but the HBA firmware is running
+ * in little endian mode. So convert it to little endian, too.
+ */
+static uint64_t megasas_frame_get_context(unsigned long frame)
+{
+    return ldq_le_phys(frame + offsetof(struct mfi_frame_header, context));
+}
+
+static bool megasas_frame_is_ieee_sgl(MegasasCmd *cmd)
+{
+    return cmd->flags & MFI_FRAME_IEEE_SGL;
+}
+
+static bool megasas_frame_is_sgl64(MegasasCmd *cmd)
+{
+    return cmd->flags & MFI_FRAME_SGL64;
+}
+
+static bool megasas_frame_is_sense64(MegasasCmd *cmd)
+{
+    return cmd->flags & MFI_FRAME_SENSE64;
+}
+
+static uint64_t megasas_sgl_get_addr(MegasasCmd *cmd,
+                                     union mfi_sgl *sgl)
+{
+    uint64_t addr;
+
+    if (megasas_frame_is_ieee_sgl(cmd)) {
+        addr = le64_to_cpu(sgl->sg_skinny->addr);
+    } else if (megasas_frame_is_sgl64(cmd)) {
+        addr = le64_to_cpu(sgl->sg64->addr);
+    } else {
+        addr = le32_to_cpu(sgl->sg32->addr);
+    }
+    return addr;
+}
+
+static uint32_t megasas_sgl_get_len(MegasasCmd *cmd,
+                                    union mfi_sgl *sgl)
+{
+    uint32_t len;
+
+    if (megasas_frame_is_ieee_sgl(cmd)) {
+        len = le32_to_cpu(sgl->sg_skinny->len);
+    } else if (megasas_frame_is_sgl64(cmd)) {
+        len = le32_to_cpu(sgl->sg64->len);
+    } else {
+        len = le32_to_cpu(sgl->sg32->len);
+    }
+    return len;
+}
+
+static union mfi_sgl *megasas_sgl_next(MegasasCmd *cmd,
+                                       union mfi_sgl *sgl)
+{
+    uint8_t *next = (uint8_t *)sgl;
+
+    if (megasas_frame_is_ieee_sgl(cmd)) {
+        next += sizeof(struct mfi_sg_skinny);
+    } else if (megasas_frame_is_sgl64(cmd)) {
+        next += sizeof(struct mfi_sg64);
+    } else {
+        next += sizeof(struct mfi_sg32);
+    }
+
+    if (next >= (uint8_t *)cmd->frame + cmd->pa_size) {
+        return NULL;
+    }
+    return (union mfi_sgl *)next;
+}
+
+static void megasas_soft_reset(MegasasState *s);
+
+static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl)
+{
+    int i;
+    int iov_count = 0;
+    size_t iov_size = 0;
+
+    cmd->flags = le16_to_cpu(cmd->frame->header.flags);
+    iov_count = cmd->frame->header.sge_count;
+    if (iov_count > MEGASAS_MAX_SGE) {
+        trace_megasas_iovec_sgl_overflow(cmd->index, iov_count,
+                                         MEGASAS_MAX_SGE);
+        return iov_count;
+    }
+    qemu_sglist_init(&cmd->qsg, iov_count, pci_dma_context(&s->dev));
+    for (i = 0; i < iov_count; i++) {
+        dma_addr_t iov_pa, iov_size_p;
+
+        if (!sgl) {
+            trace_megasas_iovec_sgl_underflow(cmd->index, i);
+            goto unmap;
+        }
+        iov_pa = megasas_sgl_get_addr(cmd, sgl);
+        iov_size_p = megasas_sgl_get_len(cmd, sgl);
+        if (!iov_pa || !iov_size_p) {
+            trace_megasas_iovec_sgl_invalid(cmd->index, i,
+                                            iov_pa, iov_size_p);
+            goto unmap;
+        }
+        qemu_sglist_add(&cmd->qsg, iov_pa, iov_size_p);
+        sgl = megasas_sgl_next(cmd, sgl);
+        iov_size += (size_t)iov_size_p;
+    }
+    if (cmd->iov_size > iov_size) {
+        trace_megasas_iovec_overflow(cmd->index, iov_size, cmd->iov_size);
+    } else if (cmd->iov_size < iov_size) {
+        trace_megasas_iovec_underflow(cmd->iov_size, iov_size, cmd->iov_size);
+    }
+    cmd->iov_offset = 0;
+    return 0;
+unmap:
+    qemu_sglist_destroy(&cmd->qsg);
+    return iov_count - i;
+}
+
+static void megasas_unmap_sgl(MegasasCmd *cmd)
+{
+    qemu_sglist_destroy(&cmd->qsg);
+    cmd->iov_offset = 0;
+}
+
+/*
+ * passthrough sense and io sense are at the same offset
+ */
+static int megasas_build_sense(MegasasCmd *cmd, uint8_t *sense_ptr,
+    uint8_t sense_len)
+{
+    uint32_t pa_hi = 0, pa_lo;
+    target_phys_addr_t pa;
+
+    if (sense_len > cmd->frame->header.sense_len) {
+        sense_len = cmd->frame->header.sense_len;
+    }
+    if (sense_len) {
+        pa_lo = le32_to_cpu(cmd->frame->pass.sense_addr_lo);
+        if (megasas_frame_is_sense64(cmd)) {
+            pa_hi = le32_to_cpu(cmd->frame->pass.sense_addr_hi);
+        }
+        pa = ((uint64_t) pa_hi << 32) | pa_lo;
+        cpu_physical_memory_write(pa, sense_ptr, sense_len);
+        cmd->frame->header.sense_len = sense_len;
+    }
+    return sense_len;
+}
+
+static void megasas_write_sense(MegasasCmd *cmd, SCSISense sense)
+{
+    uint8_t sense_buf[SCSI_SENSE_BUF_SIZE];
+    uint8_t sense_len = 18;
+
+    memset(sense_buf, 0, sense_len);
+    sense_buf[0] = 0xf0;
+    sense_buf[2] = sense.key;
+    sense_buf[7] = 10;
+    sense_buf[12] = sense.asc;
+    sense_buf[13] = sense.ascq;
+    megasas_build_sense(cmd, sense_buf, sense_len);
+}
+
+static void megasas_copy_sense(MegasasCmd *cmd)
+{
+    uint8_t sense_buf[SCSI_SENSE_BUF_SIZE];
+    uint8_t sense_len;
+
+    sense_len = scsi_req_get_sense(cmd->req, sense_buf,
+                                   SCSI_SENSE_BUF_SIZE);
+    megasas_build_sense(cmd, sense_buf, sense_len);
+}
+
+/*
+ * Format an INQUIRY CDB
+ */
+static int megasas_setup_inquiry(uint8_t *cdb, int pg, int len)
+{
+    memset(cdb, 0, 6);
+    cdb[0] = INQUIRY;
+    if (pg > 0) {
+        cdb[1] = 0x1;
+        cdb[2] = pg;
+    }
+    cdb[3] = (len >> 8) & 0xff;
+    cdb[4] = (len & 0xff);
+    return len;
+}
+
+/*
+ * Encode lba and len into a READ_16/WRITE_16 CDB
+ */
+static void megasas_encode_lba(uint8_t *cdb, uint64_t lba,
+                               uint32_t len, bool is_write)
+{
+    memset(cdb, 0x0, 16);
+    if (is_write) {
+        cdb[0] = WRITE_16;
+    } else {
+        cdb[0] = READ_16;
+    }
+    cdb[2] = (lba >> 56) & 0xff;
+    cdb[3] = (lba >> 48) & 0xff;
+    cdb[4] = (lba >> 40) & 0xff;
+    cdb[5] = (lba >> 32) & 0xff;
+    cdb[6] = (lba >> 24) & 0xff;
+    cdb[7] = (lba >> 16) & 0xff;
+    cdb[8] = (lba >> 8) & 0xff;
+    cdb[9] = (lba) & 0xff;
+    cdb[10] = (len >> 24) & 0xff;
+    cdb[11] = (len >> 16) & 0xff;
+    cdb[12] = (len >> 8) & 0xff;
+    cdb[13] = (len) & 0xff;
+}
+
+/*
+ * Utility functions
+ */
+static uint64_t megasas_fw_time(void)
+{
+    struct tm curtime;
+    uint64_t bcd_time;
+
+    qemu_get_timedate(&curtime, 0);
+    bcd_time = ((uint64_t)curtime.tm_sec & 0xff) << 48 |
+        ((uint64_t)curtime.tm_min & 0xff)  << 40 |
+        ((uint64_t)curtime.tm_hour & 0xff) << 32 |
+        ((uint64_t)curtime.tm_mday & 0xff) << 24 |
+        ((uint64_t)curtime.tm_mon & 0xff)  << 16 |
+        ((uint64_t)(curtime.tm_year + 1900) & 0xffff);
+
+    return bcd_time;
+}
+
+static uint64_t megasas_gen_sas_addr(uint64_t id)
+{
+    uint64_t addr;
+
+    addr = 0x5001a4aULL << 36;
+    addr |= id & 0xfffffffff;
+
+    return addr;
+}
+
+/*
+ * Frame handling
+ */
+static int megasas_next_index(MegasasState *s, int index, int limit)
+{
+    index++;
+    if (index == limit) {
+        index = 0;
+    }
+    return index;
+}
+
+static MegasasCmd *megasas_lookup_frame(MegasasState *s,
+    target_phys_addr_t frame)
+{
+    MegasasCmd *cmd = NULL;
+    int num = 0, index;
+
+    index = s->reply_queue_head;
+
+    while (num < s->fw_cmds) {
+        if (s->frames[index].pa && s->frames[index].pa == frame) {
+            cmd = &s->frames[index];
+            break;
+        }
+        index = megasas_next_index(s, index, s->fw_cmds);
+        num++;
+    }
+
+    return cmd;
+}
+
+static MegasasCmd *megasas_next_frame(MegasasState *s,
+    target_phys_addr_t frame)
+{
+    MegasasCmd *cmd = NULL;
+    int num = 0, index;
+
+    cmd = megasas_lookup_frame(s, frame);
+    if (cmd) {
+        trace_megasas_qf_found(cmd->index, cmd->pa);
+        return cmd;
+    }
+    index = s->reply_queue_head;
+    num = 0;
+    while (num < s->fw_cmds) {
+        if (!s->frames[index].pa) {
+            cmd = &s->frames[index];
+            break;
+        }
+        index = megasas_next_index(s, index, s->fw_cmds);
+        num++;
+    }
+    if (!cmd) {
+        trace_megasas_qf_failed(frame);
+    }
+    trace_megasas_qf_new(index, cmd);
+    return cmd;
+}
+
+static MegasasCmd *megasas_enqueue_frame(MegasasState *s,
+    target_phys_addr_t frame, uint64_t context, int count)
+{
+    MegasasCmd *cmd = NULL;
+    int frame_size = MFI_FRAME_SIZE * 16;
+    target_phys_addr_t frame_size_p = frame_size;
+
+    cmd = megasas_next_frame(s, frame);
+    /* All frames busy */
+    if (!cmd) {
+        return NULL;
+    }
+    if (!cmd->pa) {
+        cmd->pa = frame;
+        /* Map all possible frames */
+        cmd->frame = cpu_physical_memory_map(frame, &frame_size_p, 0);
+        if (frame_size_p != frame_size) {
+            trace_megasas_qf_map_failed(cmd->index, (unsigned long)frame);
+            if (cmd->frame) {
+                cpu_physical_memory_unmap(cmd->frame, frame_size_p, 0, 0);
+                cmd->frame = NULL;
+                cmd->pa = 0;
+            }
+            s->event_count++;
+            return NULL;
+        }
+        cmd->pa_size = frame_size_p;
+        cmd->context = context;
+        if (!megasas_use_queue64(s)) {
+            cmd->context &= (uint64_t)0xFFFFFFFF;
+        }
+    }
+    cmd->count = count;
+    s->busy++;
+
+    trace_megasas_qf_enqueue(cmd->index, cmd->count, cmd->context,
+                             s->reply_queue_head, s->busy);
+
+    return cmd;
+}
+
+static void megasas_complete_frame(MegasasState *s, uint64_t context)
+{
+    int tail, queue_offset;
+
+    /* Decrement busy count */
+    s->busy--;
+
+    if (s->reply_queue_pa) {
+        /*
+         * Put command on the reply queue.
+         * Context is opaque, but emulation is running in
+         * little endian. So convert it.
+         */
+        tail = s->reply_queue_head;
+        if (megasas_use_queue64(s)) {
+            queue_offset = tail * sizeof(uint64_t);
+            stq_le_phys(s->reply_queue_pa + queue_offset, context);
+        } else {
+            queue_offset = tail * sizeof(uint32_t);
+            stl_le_phys(s->reply_queue_pa + queue_offset, context);
+        }
+        s->reply_queue_head = megasas_next_index(s, tail, s->fw_cmds);
+        trace_megasas_qf_complete(context, tail, queue_offset,
+                                  s->busy, s->doorbell);
+    }
+
+    if (megasas_intr_enabled(s)) {
+        /* Notify HBA */
+        s->doorbell++;
+        if (s->doorbell == 1) {
+            if (msix_enabled(&s->dev)) {
+                trace_megasas_msix_raise(0);
+                msix_notify(&s->dev, 0);
+            } else {
+                trace_megasas_irq_raise();
+                qemu_irq_raise(s->dev.irq[0]);
+            }
+        }
+    } else {
+        trace_megasas_qf_complete_noirq(context);
+    }
+}
+
+static void megasas_reset_frames(MegasasState *s)
+{
+    int i;
+    MegasasCmd *cmd;
+
+    for (i = 0; i < s->fw_cmds; i++) {
+        cmd = &s->frames[i];
+        if (cmd->pa) {
+            cpu_physical_memory_unmap(cmd->frame, cmd->pa_size, 0, 0);
+            cmd->frame = NULL;
+            cmd->pa = 0;
+        }
+    }
+}
+
+static void megasas_abort_command(MegasasCmd *cmd)
+{
+    if (cmd->req) {
+        scsi_req_abort(cmd->req, ABORTED_COMMAND);
+        cmd->req = NULL;
+    }
+}
+
+static int megasas_init_firmware(MegasasState *s, MegasasCmd *cmd)
+{
+    uint32_t pa_hi, pa_lo;
+    target_phys_addr_t iq_pa, initq_size;
+    struct mfi_init_qinfo *initq;
+    uint32_t flags;
+    int ret = MFI_STAT_OK;
+
+    pa_lo = le32_to_cpu(cmd->frame->init.qinfo_new_addr_lo);
+    pa_hi = le32_to_cpu(cmd->frame->init.qinfo_new_addr_hi);
+    iq_pa = (((uint64_t) pa_hi << 32) | pa_lo);
+    trace_megasas_init_firmware((uint64_t)iq_pa);
+    initq_size = sizeof(*initq);
+    initq = cpu_physical_memory_map(iq_pa, &initq_size, 0);
+    if (!initq || initq_size != sizeof(*initq)) {
+        trace_megasas_initq_map_failed(cmd->index);
+        s->event_count++;
+        ret = MFI_STAT_MEMORY_NOT_AVAILABLE;
+        goto out;
+    }
+    s->reply_queue_len = le32_to_cpu(initq->rq_entries) & 0xFFFF;
+    if (s->reply_queue_len > s->fw_cmds) {
+        trace_megasas_initq_mismatch(s->reply_queue_len, s->fw_cmds);
+        s->event_count++;
+        ret = MFI_STAT_INVALID_PARAMETER;
+        goto out;
+    }
+    pa_lo = le32_to_cpu(initq->rq_addr_lo);
+    pa_hi = le32_to_cpu(initq->rq_addr_hi);
+    s->reply_queue_pa = ((uint64_t) pa_hi << 32) | pa_lo;
+    pa_lo = le32_to_cpu(initq->ci_addr_lo);
+    pa_hi = le32_to_cpu(initq->ci_addr_hi);
+    s->consumer_pa = ((uint64_t) pa_hi << 32) | pa_lo;
+    pa_lo = le32_to_cpu(initq->pi_addr_lo);
+    pa_hi = le32_to_cpu(initq->pi_addr_hi);
+    s->producer_pa = ((uint64_t) pa_hi << 32) | pa_lo;
+    s->reply_queue_head = ldl_le_phys(s->producer_pa);
+    s->reply_queue_tail = ldl_le_phys(s->consumer_pa);
+    flags = le32_to_cpu(initq->flags);
+    if (flags & MFI_QUEUE_FLAG_CONTEXT64) {
+        s->flags |= MEGASAS_MASK_USE_QUEUE64;
+    }
+    trace_megasas_init_queue((unsigned long)s->reply_queue_pa,
+                             s->reply_queue_len, s->reply_queue_head,
+                             s->reply_queue_tail, flags);
+    megasas_reset_frames(s);
+    s->fw_state = MFI_FWSTATE_OPERATIONAL;
+out:
+    if (initq) {
+        cpu_physical_memory_unmap(initq, initq_size, 0, 0);
+    }
+    return ret;
+}
+
+static int megasas_map_dcmd(MegasasState *s, MegasasCmd *cmd)
+{
+    dma_addr_t iov_pa, iov_size;
+
+    cmd->flags = le16_to_cpu(cmd->frame->header.flags);
+    if (!cmd->frame->header.sge_count) {
+        trace_megasas_dcmd_zero_sge(cmd->index);
+        cmd->iov_size = 0;
+        return 0;
+    } else if (cmd->frame->header.sge_count > 1) {
+        trace_megasas_dcmd_invalid_sge(cmd->index,
+                                       cmd->frame->header.sge_count);
+        cmd->iov_size = 0;
+        return -1;
+    }
+    iov_pa = megasas_sgl_get_addr(cmd, &cmd->frame->dcmd.sgl);
+    iov_size = megasas_sgl_get_len(cmd, &cmd->frame->dcmd.sgl);
+    qemu_sglist_init(&cmd->qsg, 1, pci_dma_context(&s->dev));
+    qemu_sglist_add(&cmd->qsg, iov_pa, iov_size);
+    cmd->iov_size = iov_size;
+    return cmd->iov_size;
+}
+
+static void megasas_finish_dcmd(MegasasCmd *cmd, uint32_t iov_size)
+{
+    trace_megasas_finish_dcmd(cmd->index, iov_size);
+
+    if (cmd->frame->header.sge_count) {
+        qemu_sglist_destroy(&cmd->qsg);
+    }
+    if (iov_size > cmd->iov_size) {
+        if (megasas_frame_is_ieee_sgl(cmd)) {
+            cmd->frame->dcmd.sgl.sg_skinny->len = cpu_to_le32(iov_size);
+        } else if (megasas_frame_is_sgl64(cmd)) {
+            cmd->frame->dcmd.sgl.sg64->len = cpu_to_le32(iov_size);
+        } else {
+            cmd->frame->dcmd.sgl.sg32->len = cpu_to_le32(iov_size);
+        }
+    }
+    cmd->iov_size = 0;
+    return;
+}
+
+static int megasas_ctrl_get_info(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_ctrl_info info;
+    size_t dcmd_size = sizeof(info);
+    BusChild *kid;
+    int num_ld_disks = 0;
+
+    QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
+        num_ld_disks++;
+    }
+
+    memset(&info, 0x0, cmd->iov_size);
+    if (cmd->iov_size < dcmd_size) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_size);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    info.pci.vendor = cpu_to_le16(PCI_VENDOR_ID_LSI_LOGIC);
+    info.pci.device = cpu_to_le16(PCI_DEVICE_ID_LSI_SAS1078);
+    info.pci.subvendor = cpu_to_le16(PCI_VENDOR_ID_LSI_LOGIC);
+    info.pci.subdevice = cpu_to_le16(0x1013);
+
+    info.host.type = MFI_INFO_HOST_PCIX;
+    info.device.type = MFI_INFO_DEV_SAS3G;
+    info.device.port_count = 2;
+    info.device.port_addr[0] = cpu_to_le64(megasas_gen_sas_addr((uint64_t)s));
+
+    memcpy(info.product_name, "MegaRAID SAS 8708EM2", 20);
+    snprintf(info.serial_number, 32, "QEMU%08lx",
+             (unsigned long)s & 0xFFFFFFFF);
+    snprintf(info.package_version, 0x60, "%s-QEMU", QEMU_VERSION);
+    memcpy(info.image_component[0].name, "APP", 3);
+    memcpy(info.image_component[0].version, MEGASAS_VERSION "-QEMU", 9);
+    memcpy(info.image_component[0].build_date, __DATE__, 11);
+    memcpy(info.image_component[0].build_time, __TIME__, 8);
+    info.image_component_count = 1;
+    if (s->dev.has_rom) {
+        uint8_t biosver[32];
+        uint8_t *ptr;
+
+        ptr = memory_region_get_ram_ptr(&s->dev.rom);
+        memcpy(biosver, ptr + 0x41, 31);
+        qemu_put_ram_ptr(ptr);
+        memcpy(info.image_component[1].name, "BIOS", 4);
+        memcpy(info.image_component[1].version, biosver,
+               strlen((const char *)biosver));
+        info.image_component_count++;
+    }
+    info.current_fw_time = cpu_to_le32(megasas_fw_time());
+    info.max_arms = 32;
+    info.max_spans = 8;
+    info.max_arrays = MEGASAS_MAX_ARRAYS;
+    info.max_lds = s->fw_luns;
+    info.max_cmds = cpu_to_le16(s->fw_cmds);
+    info.max_sg_elements = cpu_to_le16(s->fw_sge);
+    info.max_request_size = cpu_to_le32(MEGASAS_MAX_SECTORS);
+    info.lds_present = cpu_to_le16(num_ld_disks);
+    info.pd_present = cpu_to_le16(num_ld_disks);
+    info.pd_disks_present = cpu_to_le16(num_ld_disks);
+    info.hw_present = cpu_to_le32(MFI_INFO_HW_NVRAM |
+                                   MFI_INFO_HW_MEM |
+                                   MFI_INFO_HW_FLASH);
+    info.memory_size = cpu_to_le16(512);
+    info.nvram_size = cpu_to_le16(32);
+    info.flash_size = cpu_to_le16(16);
+    info.raid_levels = cpu_to_le32(MFI_INFO_RAID_0);
+    info.adapter_ops = cpu_to_le32(MFI_INFO_AOPS_RBLD_RATE |
+                                    MFI_INFO_AOPS_SELF_DIAGNOSTIC |
+                                    MFI_INFO_AOPS_MIXED_ARRAY);
+    info.ld_ops = cpu_to_le32(MFI_INFO_LDOPS_DISK_CACHE_POLICY |
+                               MFI_INFO_LDOPS_ACCESS_POLICY |
+                               MFI_INFO_LDOPS_IO_POLICY |
+                               MFI_INFO_LDOPS_WRITE_POLICY |
+                               MFI_INFO_LDOPS_READ_POLICY);
+    info.max_strips_per_io = cpu_to_le16(s->fw_sge);
+    info.stripe_sz_ops.min = 3;
+    info.stripe_sz_ops.max = ffs(MEGASAS_MAX_SECTORS + 1) - 1;
+    info.properties.pred_fail_poll_interval = cpu_to_le16(300);
+    info.properties.intr_throttle_cnt = cpu_to_le16(16);
+    info.properties.intr_throttle_timeout = cpu_to_le16(50);
+    info.properties.rebuild_rate = 30;
+    info.properties.patrol_read_rate = 30;
+    info.properties.bgi_rate = 30;
+    info.properties.cc_rate = 30;
+    info.properties.recon_rate = 30;
+    info.properties.cache_flush_interval = 4;
+    info.properties.spinup_drv_cnt = 2;
+    info.properties.spinup_delay = 6;
+    info.properties.ecc_bucket_size = 15;
+    info.properties.ecc_bucket_leak_rate = cpu_to_le16(1440);
+    info.properties.expose_encl_devices = 1;
+    info.properties.OnOffProperties = cpu_to_le32(MFI_CTRL_PROP_EnableJBOD);
+    info.pd_ops = cpu_to_le32(MFI_INFO_PDOPS_FORCE_ONLINE |
+                               MFI_INFO_PDOPS_FORCE_OFFLINE);
+    info.pd_mix_support = cpu_to_le32(MFI_INFO_PDMIX_SAS |
+                                       MFI_INFO_PDMIX_SATA |
+                                       MFI_INFO_PDMIX_LD);
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_mfc_get_defaults(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_defaults info;
+    size_t dcmd_size = sizeof(struct mfi_defaults);
+
+    memset(&info, 0x0, dcmd_size);
+    if (cmd->iov_size < dcmd_size) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_size);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    info.sas_addr = cpu_to_le64(megasas_gen_sas_addr((uint64_t)s));
+    info.stripe_size = 3;
+    info.flush_time = 4;
+    info.background_rate = 30;
+    info.allow_mix_in_enclosure = 1;
+    info.allow_mix_in_ld = 1;
+    info.direct_pd_mapping = 1;
+    /* Enable for BIOS support */
+    info.bios_enumerate_lds = 1;
+    info.disable_ctrl_r = 1;
+    info.expose_enclosure_devices = 1;
+    info.disable_preboot_cli = 1;
+    info.cluster_disable = 1;
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_get_bios_info(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_bios_data info;
+    size_t dcmd_size = sizeof(info);
+
+    memset(&info, 0x0, dcmd_size);
+    if (cmd->iov_size < dcmd_size) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_size);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+    info.continue_on_error = 1;
+    info.verbose = 1;
+    if (megasas_is_jbod(s)) {
+        info.expose_all_drives = 1;
+    }
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_get_fw_time(MegasasState *s, MegasasCmd *cmd)
+{
+    uint64_t fw_time;
+    size_t dcmd_size = sizeof(fw_time);
+
+    fw_time = cpu_to_le64(megasas_fw_time());
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&fw_time, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_set_fw_time(MegasasState *s, MegasasCmd *cmd)
+{
+    uint64_t fw_time;
+
+    /* This is a dummy; setting of firmware time is not allowed */
+    memcpy(&fw_time, cmd->frame->dcmd.mbox, sizeof(fw_time));
+
+    trace_megasas_dcmd_set_fw_time(cmd->index, fw_time);
+    fw_time = cpu_to_le64(megasas_fw_time());
+    return MFI_STAT_OK;
+}
+
+static int megasas_event_info(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_evt_log_state info;
+    size_t dcmd_size = sizeof(info);
+
+    memset(&info, 0, dcmd_size);
+
+    info.newest_seq_num = cpu_to_le32(s->event_count);
+    info.shutdown_seq_num = cpu_to_le32(s->shutdown_event);
+    info.boot_seq_num = cpu_to_le32(s->boot_event);
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_event_wait(MegasasState *s, MegasasCmd *cmd)
+{
+    union mfi_evt event;
+
+    if (cmd->iov_size < sizeof(struct mfi_evt_detail)) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            sizeof(struct mfi_evt_detail));
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+    s->event_count = cpu_to_le32(cmd->frame->dcmd.mbox[0]);
+    event.word = cpu_to_le32(cmd->frame->dcmd.mbox[4]);
+    s->event_locale = event.members.locale;
+    s->event_class = event.members.class;
+    s->event_cmd = cmd;
+    /* Decrease busy count; event frame doesn't count here */
+    s->busy--;
+    cmd->iov_size = sizeof(struct mfi_evt_detail);
+    return MFI_STAT_INVALID_STATUS;
+}
+
+static int megasas_dcmd_pd_get_list(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_pd_list info;
+    size_t dcmd_size = sizeof(info);
+    BusChild *kid;
+    uint32_t offset, dcmd_limit, num_pd_disks = 0, max_pd_disks;
+    uint16_t sdev_id;
+
+    memset(&info, 0, dcmd_size);
+    offset = 8;
+    dcmd_limit = offset + sizeof(struct mfi_pd_address);
+    if (cmd->iov_size < dcmd_limit) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_limit);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    max_pd_disks = (cmd->iov_size - offset) / sizeof(struct mfi_pd_address);
+    if (max_pd_disks > s->fw_luns) {
+        max_pd_disks = s->fw_luns;
+    }
+
+    QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
+        SCSIDevice *sdev = DO_UPCAST(SCSIDevice, qdev, kid->child);
+
+        sdev_id = ((sdev->id & 0xFF) >> 8) | (sdev->lun & 0xFF);
+        info.addr[num_pd_disks].device_id = cpu_to_le16(sdev_id);
+        info.addr[num_pd_disks].encl_device_id = 0xFFFF;
+        info.addr[num_pd_disks].encl_index = 0;
+        info.addr[num_pd_disks].slot_number = (sdev->id & 0xFF);
+        info.addr[num_pd_disks].scsi_dev_type = sdev->type;
+        info.addr[num_pd_disks].connect_port_bitmap = 0x1;
+        info.addr[num_pd_disks].sas_addr[0] =
+            cpu_to_le64(megasas_gen_sas_addr((uint64_t)sdev));
+        num_pd_disks++;
+        offset += sizeof(struct mfi_pd_address);
+    }
+    trace_megasas_dcmd_pd_get_list(cmd->index, num_pd_disks,
+                                   max_pd_disks, offset);
+
+    info.size = cpu_to_le32(offset);
+    info.count = cpu_to_le32(num_pd_disks);
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, offset, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_pd_list_query(MegasasState *s, MegasasCmd *cmd)
+{
+    uint16_t flags;
+
+    /* mbox0 contains flags */
+    flags = le16_to_cpu(cmd->frame->dcmd.mbox[0]);
+    trace_megasas_dcmd_pd_list_query(cmd->index, flags);
+    if (flags == MR_PD_QUERY_TYPE_ALL ||
+        megasas_is_jbod(s)) {
+        return megasas_dcmd_pd_get_list(s, cmd);
+    }
+
+    return MFI_STAT_OK;
+}
+
+static int megasas_pd_get_info_submit(SCSIDevice *sdev, int lun,
+                                      MegasasCmd *cmd)
+{
+    struct mfi_pd_info *info = cmd->iov_buf;
+    size_t dcmd_size = sizeof(struct mfi_pd_info);
+    BlockConf *conf = &sdev->conf;
+    uint64_t pd_size;
+    uint16_t sdev_id = ((sdev->id & 0xFF) >> 8) | (lun & 0xFF);
+    uint8_t cmdbuf[6];
+    SCSIRequest *req;
+    size_t len, resid;
+
+    if (!cmd->iov_buf) {
+        cmd->iov_buf = g_malloc(dcmd_size);
+        memset(cmd->iov_buf, 0, dcmd_size);
+        info = cmd->iov_buf;
+        info->inquiry_data[0] = 0x7f; /* Force PQual 0x3, PType 0x1f */
+        info->vpd_page83[0] = 0x7f;
+        megasas_setup_inquiry(cmdbuf, 0, sizeof(info->inquiry_data));
+        req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
+        if (!req) {
+            trace_megasas_dcmd_req_alloc_failed(cmd->index,
+                                                "PD get info std inquiry");
+            g_free(cmd->iov_buf);
+            cmd->iov_buf = NULL;
+            return MFI_STAT_FLASH_ALLOC_FAIL;
+        }
+        trace_megasas_dcmd_internal_submit(cmd->index,
+                                           "PD get info std inquiry", lun);
+        len = scsi_req_enqueue(req);
+        if (len > 0) {
+            cmd->iov_size = len;
+            scsi_req_continue(req);
+        }
+        return MFI_STAT_INVALID_STATUS;
+    } else if (info->inquiry_data[0] != 0x7f && info->vpd_page83[0] == 0x7f) {
+        megasas_setup_inquiry(cmdbuf, 0x83, sizeof(info->vpd_page83));
+        req = scsi_req_new(sdev, cmd->index, lun, cmdbuf, cmd);
+        if (!req) {
+            trace_megasas_dcmd_req_alloc_failed(cmd->index,
+                                                "PD get info vpd inquiry");
+            return MFI_STAT_FLASH_ALLOC_FAIL;
+        }
+        trace_megasas_dcmd_internal_submit(cmd->index,
+                                           "PD get info vpd inquiry", lun);
+        len = scsi_req_enqueue(req);
+        if (len > 0) {
+            cmd->iov_size = len;
+            scsi_req_continue(req);
+        }
+        return MFI_STAT_INVALID_STATUS;
+    }
+    /* Finished, set FW state */
+    if ((info->inquiry_data[0] >> 5) == 0) {
+        if (megasas_is_jbod(cmd->state)) {
+            info->fw_state = cpu_to_le16(MFI_PD_STATE_SYSTEM);
+        } else {
+            info->fw_state = cpu_to_le16(MFI_PD_STATE_ONLINE);
+        }
+    } else {
+        info->fw_state = cpu_to_le16(MFI_PD_STATE_OFFLINE);
+    }
+
+    info->ref.v.device_id = cpu_to_le16(sdev_id);
+    info->state.ddf.pd_type = cpu_to_le16(MFI_PD_DDF_TYPE_IN_VD|
+                                          MFI_PD_DDF_TYPE_INTF_SAS);
+    bdrv_get_geometry(conf->bs, &pd_size);
+    info->raw_size = cpu_to_le64(pd_size);
+    info->non_coerced_size = cpu_to_le64(pd_size);
+    info->coerced_size = cpu_to_le64(pd_size);
+    info->encl_device_id = 0xFFFF;
+    info->slot_number = (sdev->id & 0xFF);
+    info->path_info.count = 1;
+    info->path_info.sas_addr[0] =
+        cpu_to_le64(megasas_gen_sas_addr((uint64_t)sdev));
+    info->connected_port_bitmap = 0x1;
+    info->device_speed = 1;
+    info->link_speed = 1;
+    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg);
+    g_free(cmd->iov_buf);
+    cmd->iov_size = dcmd_size - resid;
+    cmd->iov_buf = NULL;
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_pd_get_info(MegasasState *s, MegasasCmd *cmd)
+{
+    size_t dcmd_size = sizeof(struct mfi_pd_info);
+    uint16_t pd_id;
+    SCSIDevice *sdev = NULL;
+    int retval = MFI_STAT_DEVICE_NOT_FOUND;
+
+    if (cmd->iov_size < dcmd_size) {
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    /* mbox0 has the ID */
+    pd_id = le16_to_cpu(cmd->frame->dcmd.mbox[0]);
+    sdev = scsi_device_find(&s->bus, 0, pd_id, 0);
+    trace_megasas_dcmd_pd_get_info(cmd->index, pd_id);
+
+    if (sdev) {
+        /* Submit inquiry */
+        retval = megasas_pd_get_info_submit(sdev, pd_id, cmd);
+    }
+
+    return retval;
+}
+
+static int megasas_dcmd_ld_get_list(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_ld_list info;
+    size_t dcmd_size = sizeof(info), resid;
+    uint32_t num_ld_disks = 0, max_ld_disks = s->fw_luns;
+    uint64_t ld_size;
+    BusChild *kid;
+
+    memset(&info, 0, dcmd_size);
+    if (cmd->iov_size < dcmd_size) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_size);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    if (megasas_is_jbod(s)) {
+        max_ld_disks = 0;
+    }
+    QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
+        SCSIDevice *sdev = DO_UPCAST(SCSIDevice, qdev, kid->child);
+        BlockConf *conf = &sdev->conf;
+
+        if (num_ld_disks >= max_ld_disks) {
+            break;
+        }
+        /* Logical device size is in blocks */
+        bdrv_get_geometry(conf->bs, &ld_size);
+        info.ld_list[num_ld_disks].ld.v.target_id = sdev->id;
+        info.ld_list[num_ld_disks].state = MFI_LD_STATE_OPTIMAL;
+        info.ld_list[num_ld_disks].size = cpu_to_le64(ld_size);
+        num_ld_disks++;
+    }
+    info.ld_count = cpu_to_le32(num_ld_disks);
+    trace_megasas_dcmd_ld_get_list(cmd->index, num_ld_disks, max_ld_disks);
+
+    resid = dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    cmd->iov_size = dcmd_size - resid;
+    return MFI_STAT_OK;
+}
+
+static int megasas_ld_get_info_submit(SCSIDevice *sdev, int lun,
+                                      MegasasCmd *cmd)
+{
+    struct mfi_ld_info *info = cmd->iov_buf;
+    size_t dcmd_size = sizeof(struct mfi_ld_info);
+    uint8_t cdb[6];
+    SCSIRequest *req;
+    ssize_t len, resid;
+    BlockConf *conf = &sdev->conf;
+    uint16_t sdev_id = ((sdev->id & 0xFF) >> 8) | (lun & 0xFF);
+    uint64_t ld_size;
+
+    if (!cmd->iov_buf) {
+        cmd->iov_buf = g_malloc(dcmd_size);
+        memset(cmd->iov_buf, 0x0, dcmd_size);
+        info = cmd->iov_buf;
+        megasas_setup_inquiry(cdb, 0x83, sizeof(info->vpd_page83));
+        req = scsi_req_new(sdev, cmd->index, lun, cdb, cmd);
+        if (!req) {
+            trace_megasas_dcmd_req_alloc_failed(cmd->index,
+                                                "LD get info vpd inquiry");
+            g_free(cmd->iov_buf);
+            cmd->iov_buf = NULL;
+            return MFI_STAT_FLASH_ALLOC_FAIL;
+        }
+        trace_megasas_dcmd_internal_submit(cmd->index,
+                                           "LD get info vpd inquiry", lun);
+        len = scsi_req_enqueue(req);
+        if (len > 0) {
+            cmd->iov_size = len;
+            scsi_req_continue(req);
+        }
+        return MFI_STAT_INVALID_STATUS;
+    }
+
+    info->ld_config.params.state = MFI_LD_STATE_OPTIMAL;
+    info->ld_config.properties.ld.v.target_id = lun;
+    info->ld_config.params.stripe_size = 3;
+    info->ld_config.params.num_drives = 1;
+    info->ld_config.params.is_consistent = 1;
+    /* Logical device size is in blocks */
+    bdrv_get_geometry(conf->bs, &ld_size);
+    info->size = cpu_to_le64(ld_size);
+    memset(info->ld_config.span, 0, sizeof(info->ld_config.span));
+    info->ld_config.span[0].start_block = 0;
+    info->ld_config.span[0].num_blocks = info->size;
+    info->ld_config.span[0].array_ref = cpu_to_le16(sdev_id);
+
+    resid = dma_buf_read(cmd->iov_buf, dcmd_size, &cmd->qsg);
+    g_free(cmd->iov_buf);
+    cmd->iov_size = dcmd_size - resid;
+    cmd->iov_buf = NULL;
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_ld_get_info(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_ld_info info;
+    size_t dcmd_size = sizeof(info);
+    uint16_t ld_id;
+    uint32_t max_ld_disks = s->fw_luns;
+    SCSIDevice *sdev = NULL;
+    int retval = MFI_STAT_DEVICE_NOT_FOUND;
+
+    if (cmd->iov_size < dcmd_size) {
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    /* mbox0 has the ID */
+    ld_id = le16_to_cpu(cmd->frame->dcmd.mbox[0]);
+    trace_megasas_dcmd_ld_get_info(cmd->index, ld_id);
+
+    if (megasas_is_jbod(s)) {
+        return MFI_STAT_DEVICE_NOT_FOUND;
+    }
+
+    if (ld_id < max_ld_disks) {
+        sdev = scsi_device_find(&s->bus, 0, ld_id, 0);
+    }
+
+    if (sdev) {
+        retval = megasas_ld_get_info_submit(sdev, ld_id, cmd);
+    }
+
+    return retval;
+}
+
+static int megasas_dcmd_cfg_read(MegasasState *s, MegasasCmd *cmd)
+{
+    uint8_t data[4096];
+    struct mfi_config_data *info;
+    int num_pd_disks = 0, array_offset, ld_offset;
+    BusChild *kid;
+
+    if (cmd->iov_size > 4096) {
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
+        num_pd_disks++;
+    }
+    info = (struct mfi_config_data *)&data;
+    /*
+     * Array mapping:
+     * - One array per SCSI device
+     * - One logical drive per SCSI device
+     *   spanning the entire device
+     */
+    info->array_count = num_pd_disks;
+    info->array_size = sizeof(struct mfi_array) * num_pd_disks;
+    info->log_drv_count = num_pd_disks;
+    info->log_drv_size = sizeof(struct mfi_ld_config) * num_pd_disks;
+    info->spares_count = 0;
+    info->spares_size = sizeof(struct mfi_spare);
+    info->size = sizeof(struct mfi_config_data) + info->array_size +
+        info->log_drv_size;
+    if (info->size > 4096) {
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+
+    array_offset = sizeof(struct mfi_config_data);
+    ld_offset = array_offset + sizeof(struct mfi_array) * num_pd_disks;
+
+    QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
+        SCSIDevice *sdev = DO_UPCAST(SCSIDevice, qdev, kid->child);
+        BlockConf *conf = &sdev->conf;
+        uint16_t sdev_id = ((sdev->id & 0xFF) >> 8) | (sdev->lun & 0xFF);
+        struct mfi_array *array;
+        struct mfi_ld_config *ld;
+        uint64_t pd_size;
+        int i;
+
+        array = (struct mfi_array *)(data + array_offset);
+        bdrv_get_geometry(conf->bs, &pd_size);
+        array->size = cpu_to_le64(pd_size);
+        array->num_drives = 1;
+        array->array_ref = cpu_to_le16(sdev_id);
+        array->pd[0].ref.v.device_id = cpu_to_le16(sdev_id);
+        array->pd[0].ref.v.seq_num = 0;
+        array->pd[0].fw_state = MFI_PD_STATE_ONLINE;
+        array->pd[0].encl.pd = 0xFF;
+        array->pd[0].encl.slot = (sdev->id & 0xFF);
+        for (i = 1; i < MFI_MAX_ROW_SIZE; i++) {
+            array->pd[i].ref.v.device_id = 0xFFFF;
+            array->pd[i].ref.v.seq_num = 0;
+            array->pd[i].fw_state = MFI_PD_STATE_UNCONFIGURED_GOOD;
+            array->pd[i].encl.pd = 0xFF;
+            array->pd[i].encl.slot = 0xFF;
+        }
+        array_offset += sizeof(struct mfi_array);
+        ld = (struct mfi_ld_config *)(data + ld_offset);
+        memset(ld, 0, sizeof(struct mfi_ld_config));
+        ld->properties.ld.v.target_id = (sdev->id & 0xFF);
+        ld->properties.default_cache_policy = MR_LD_CACHE_READ_AHEAD |
+            MR_LD_CACHE_READ_ADAPTIVE;
+        ld->properties.current_cache_policy = MR_LD_CACHE_READ_AHEAD |
+            MR_LD_CACHE_READ_ADAPTIVE;
+        ld->params.state = MFI_LD_STATE_OPTIMAL;
+        ld->params.stripe_size = 3;
+        ld->params.num_drives = 1;
+        ld->params.span_depth = 1;
+        ld->params.is_consistent = 1;
+        ld->span[0].start_block = 0;
+        ld->span[0].num_blocks = cpu_to_le64(pd_size);
+        ld->span[0].array_ref = cpu_to_le16(sdev_id);
+        ld_offset += sizeof(struct mfi_ld_config);
+    }
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)data, info->size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_get_properties(MegasasState *s, MegasasCmd *cmd)
+{
+    struct mfi_ctrl_props info;
+    size_t dcmd_size = sizeof(info);
+
+    memset(&info, 0x0, dcmd_size);
+    if (cmd->iov_size < dcmd_size) {
+        trace_megasas_dcmd_invalid_xfer_len(cmd->index, cmd->iov_size,
+                                            dcmd_size);
+        return MFI_STAT_INVALID_PARAMETER;
+    }
+    info.pred_fail_poll_interval = cpu_to_le16(300);
+    info.intr_throttle_cnt = cpu_to_le16(16);
+    info.intr_throttle_timeout = cpu_to_le16(50);
+    info.rebuild_rate = 30;
+    info.patrol_read_rate = 30;
+    info.bgi_rate = 30;
+    info.cc_rate = 30;
+    info.recon_rate = 30;
+    info.cache_flush_interval = 4;
+    info.spinup_drv_cnt = 2;
+    info.spinup_delay = 6;
+    info.ecc_bucket_size = 15;
+    info.ecc_bucket_leak_rate = cpu_to_le16(1440);
+    info.expose_encl_devices = 1;
+
+    cmd->iov_size -= dma_buf_read((uint8_t *)&info, dcmd_size, &cmd->qsg);
+    return MFI_STAT_OK;
+}
+
+static int megasas_cache_flush(MegasasState *s, MegasasCmd *cmd)
+{
+    qemu_aio_flush();
+    return MFI_STAT_OK;
+}
+
+static int megasas_ctrl_shutdown(MegasasState *s, MegasasCmd *cmd)
+{
+    s->fw_state = MFI_FWSTATE_READY;
+    return MFI_STAT_OK;
+}
+
+static int megasas_cluster_reset_ld(MegasasState *s, MegasasCmd *cmd)
+{
+    return MFI_STAT_INVALID_DCMD;
+}
+
+static int megasas_dcmd_set_properties(MegasasState *s, MegasasCmd *cmd)
+{
+    uint8_t *dummy = g_malloc(cmd->iov_size);
+
+    dma_buf_write(dummy, cmd->iov_size, &cmd->qsg);
+
+    trace_megasas_dcmd_dump_frame(0,
+            dummy[0x00], dummy[0x01], dummy[0x02], dummy[0x03],
+            dummy[0x04], dummy[0x05], dummy[0x06], dummy[0x07]);
+    trace_megasas_dcmd_dump_frame(1,
+            dummy[0x08], dummy[0x09], dummy[0x0a], dummy[0x0b],
+            dummy[0x0c], dummy[0x0d], dummy[0x0e], dummy[0x0f]);
+    trace_megasas_dcmd_dump_frame(2,
+            dummy[0x10], dummy[0x11], dummy[0x12], dummy[0x13],
+            dummy[0x14], dummy[0x15], dummy[0x16], dummy[0x17]);
+    trace_megasas_dcmd_dump_frame(3,
+            dummy[0x18], dummy[0x19], dummy[0x1a], dummy[0x1b],
+            dummy[0x1c], dummy[0x1d], dummy[0x1e], dummy[0x1f]);
+    trace_megasas_dcmd_dump_frame(4,
+            dummy[0x20], dummy[0x21], dummy[0x22], dummy[0x23],
+            dummy[0x24], dummy[0x25], dummy[0x26], dummy[0x27]);
+    trace_megasas_dcmd_dump_frame(5,
+            dummy[0x28], dummy[0x29], dummy[0x2a], dummy[0x2b],
+            dummy[0x2c], dummy[0x2d], dummy[0x2e], dummy[0x2f]);
+    trace_megasas_dcmd_dump_frame(6,
+            dummy[0x30], dummy[0x31], dummy[0x32], dummy[0x33],
+            dummy[0x34], dummy[0x35], dummy[0x36], dummy[0x37]);
+    trace_megasas_dcmd_dump_frame(7,
+            dummy[0x38], dummy[0x39], dummy[0x3a], dummy[0x3b],
+            dummy[0x3c], dummy[0x3d], dummy[0x3e], dummy[0x3f]);
+    g_free(dummy);
+    return MFI_STAT_OK;
+}
+
+static int megasas_dcmd_dummy(MegasasState *s, MegasasCmd *cmd)
+{
+    trace_megasas_dcmd_dummy(cmd->index, cmd->iov_size);
+    return MFI_STAT_OK;
+}
+
+static const struct dcmd_cmd_tbl_t {
+    int opcode;
+    const char *desc;
+    int (*func)(MegasasState *s, MegasasCmd *cmd);
+} dcmd_cmd_tbl[] = {
+    { MFI_DCMD_CTRL_MFI_HOST_MEM_ALLOC, "CTRL_HOST_MEM_ALLOC",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_GET_INFO, "CTRL_GET_INFO",
+      megasas_ctrl_get_info },
+    { MFI_DCMD_CTRL_GET_PROPERTIES, "CTRL_GET_PROPERTIES",
+      megasas_dcmd_get_properties },
+    { MFI_DCMD_CTRL_SET_PROPERTIES, "CTRL_SET_PROPERTIES",
+      megasas_dcmd_set_properties },
+    { MFI_DCMD_CTRL_ALARM_GET, "CTRL_ALARM_GET",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_ALARM_ENABLE, "CTRL_ALARM_ENABLE",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_ALARM_DISABLE, "CTRL_ALARM_DISABLE",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_ALARM_SILENCE, "CTRL_ALARM_SILENCE",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_ALARM_TEST, "CTRL_ALARM_TEST",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_EVENT_GETINFO, "CTRL_EVENT_GETINFO",
+      megasas_event_info },
+    { MFI_DCMD_CTRL_EVENT_GET, "CTRL_EVENT_GET",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_EVENT_WAIT, "CTRL_EVENT_WAIT",
+      megasas_event_wait },
+    { MFI_DCMD_CTRL_SHUTDOWN, "CTRL_SHUTDOWN",
+      megasas_ctrl_shutdown },
+    { MFI_DCMD_HIBERNATE_STANDBY, "CTRL_STANDBY",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_GET_TIME, "CTRL_GET_TIME",
+      megasas_dcmd_get_fw_time },
+    { MFI_DCMD_CTRL_SET_TIME, "CTRL_SET_TIME",
+      megasas_dcmd_set_fw_time },
+    { MFI_DCMD_CTRL_BIOS_DATA_GET, "CTRL_BIOS_DATA_GET",
+      megasas_dcmd_get_bios_info },
+    { MFI_DCMD_CTRL_FACTORY_DEFAULTS, "CTRL_FACTORY_DEFAULTS",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_MFC_DEFAULTS_GET, "CTRL_MFC_DEFAULTS_GET",
+      megasas_mfc_get_defaults },
+    { MFI_DCMD_CTRL_MFC_DEFAULTS_SET, "CTRL_MFC_DEFAULTS_SET",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CTRL_CACHE_FLUSH, "CTRL_CACHE_FLUSH",
+      megasas_cache_flush },
+    { MFI_DCMD_PD_GET_LIST, "PD_GET_LIST",
+      megasas_dcmd_pd_get_list },
+    { MFI_DCMD_PD_LIST_QUERY, "PD_LIST_QUERY",
+      megasas_dcmd_pd_list_query },
+    { MFI_DCMD_PD_GET_INFO, "PD_GET_INFO",
+      megasas_dcmd_pd_get_info },
+    { MFI_DCMD_PD_STATE_SET, "PD_STATE_SET",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_PD_REBUILD, "PD_REBUILD",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_PD_BLINK, "PD_BLINK",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_PD_UNBLINK, "PD_UNBLINK",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_LD_GET_LIST, "LD_GET_LIST",
+      megasas_dcmd_ld_get_list},
+    { MFI_DCMD_LD_GET_INFO, "LD_GET_INFO",
+      megasas_dcmd_ld_get_info },
+    { MFI_DCMD_LD_GET_PROP, "LD_GET_PROP",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_LD_SET_PROP, "LD_SET_PROP",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_LD_DELETE, "LD_DELETE",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CFG_READ, "CFG_READ",
+      megasas_dcmd_cfg_read },
+    { MFI_DCMD_CFG_ADD, "CFG_ADD",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CFG_CLEAR, "CFG_CLEAR",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CFG_FOREIGN_READ, "CFG_FOREIGN_READ",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CFG_FOREIGN_IMPORT, "CFG_FOREIGN_IMPORT",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_BBU_STATUS, "BBU_STATUS",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_BBU_CAPACITY_INFO, "BBU_CAPACITY_INFO",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_BBU_DESIGN_INFO, "BBU_DESIGN_INFO",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_BBU_PROP_GET, "BBU_PROP_GET",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CLUSTER, "CLUSTER",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CLUSTER_RESET_ALL, "CLUSTER_RESET_ALL",
+      megasas_dcmd_dummy },
+    { MFI_DCMD_CLUSTER_RESET_LD, "CLUSTER_RESET_LD",
+      megasas_cluster_reset_ld },
+    { -1, NULL, NULL }
+};
+
+static int megasas_handle_dcmd(MegasasState *s, MegasasCmd *cmd)
+{
+    int opcode, len;
+    int retval = 0;
+    const struct dcmd_cmd_tbl_t *cmdptr = dcmd_cmd_tbl;
+
+    opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
+    trace_megasas_handle_dcmd(cmd->index, opcode);
+    len = megasas_map_dcmd(s, cmd);
+    if (len < 0) {
+        return MFI_STAT_MEMORY_NOT_AVAILABLE;
+    }
+    while (cmdptr->opcode != -1 && cmdptr->opcode != opcode) {
+        cmdptr++;
+    }
+    if (cmdptr->opcode == -1) {
+        trace_megasas_dcmd_unhandled(cmd->index, opcode, len);
+        retval = megasas_dcmd_dummy(s, cmd);
+    } else {
+        trace_megasas_dcmd_enter(cmd->index, cmdptr->desc, len);
+        retval = cmdptr->func(s, cmd);
+    }
+    if (retval != MFI_STAT_INVALID_STATUS) {
+        megasas_finish_dcmd(cmd, len);
+    }
+    return retval;
+}
+
+static int megasas_finish_internal_dcmd(MegasasCmd *cmd,
+                                        SCSIRequest *req)
+{
+    int opcode;
+    int retval = MFI_STAT_OK;
+    int lun = req->lun;
+
+    opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
+    scsi_req_unref(req);
+    trace_megasas_dcmd_internal_finish(cmd->index, opcode, lun);
+    switch (opcode) {
+    case MFI_DCMD_PD_GET_INFO:
+        retval = megasas_pd_get_info_submit(req->dev, lun, cmd);
+        break;
+    case MFI_DCMD_LD_GET_INFO:
+        retval = megasas_ld_get_info_submit(req->dev, lun, cmd);
+        break;
+    default:
+        trace_megasas_dcmd_internal_invalid(cmd->index, opcode);
+        retval = MFI_STAT_INVALID_DCMD;
+        break;
+    }
+    if (retval != MFI_STAT_INVALID_STATUS) {
+        megasas_finish_dcmd(cmd, cmd->iov_size);
+    }
+    return retval;
+}
+
+static int megasas_enqueue_req(MegasasCmd *cmd, bool is_write)
+{
+    int len;
+
+    len = scsi_req_enqueue(cmd->req);
+    if (len < 0) {
+        len = -len;
+    }
+    if (len > 0) {
+        if (len > cmd->iov_size) {
+            if (is_write) {
+                trace_megasas_iov_write_overflow(cmd->index, len,
+                                                 cmd->iov_size);
+            } else {
+                trace_megasas_iov_read_overflow(cmd->index, len,
+                                                cmd->iov_size);
+            }
+        }
+        if (len < cmd->iov_size) {
+            if (is_write) {
+                trace_megasas_iov_write_underflow(cmd->index, len,
+                                                  cmd->iov_size);
+            } else {
+                trace_megasas_iov_read_underflow(cmd->index, len,
+                                                 cmd->iov_size);
+            }
+            cmd->iov_size = len;
+        }
+        scsi_req_continue(cmd->req);
+    }
+    return len;
+}
+
+static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd,
+                               bool is_logical)
+{
+    uint8_t *cdb;
+    int len;
+    bool is_write;
+    struct SCSIDevice *sdev = NULL;
+
+    cdb = cmd->frame->pass.cdb;
+
+    if (cmd->frame->header.target_id < s->fw_luns) {
+        sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
+                                cmd->frame->header.lun_id);
+    }
+    cmd->iov_size = le32_to_cpu(cmd->frame->header.data_len);
+    trace_megasas_handle_scsi(mfi_frame_desc[cmd->frame->header.frame_cmd],
+                              is_logical, cmd->frame->header.target_id,
+                              cmd->frame->header.lun_id, sdev, cmd->iov_size);
+
+    if (!sdev || (megasas_is_jbod(s) && is_logical)) {
+        trace_megasas_scsi_target_not_present(
+            mfi_frame_desc[cmd->frame->header.frame_cmd], is_logical,
+            cmd->frame->header.target_id, cmd->frame->header.lun_id);
+        return MFI_STAT_DEVICE_NOT_FOUND;
+    }
+
+    if (cmd->frame->header.cdb_len > 16) {
+        trace_megasas_scsi_invalid_cdb_len(
+                mfi_frame_desc[cmd->frame->header.frame_cmd], is_logical,
+                cmd->frame->header.target_id, cmd->frame->header.lun_id,
+                cmd->frame->header.cdb_len);
+        megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
+        cmd->frame->header.scsi_status = CHECK_CONDITION;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+
+    if (megasas_map_sgl(s, cmd, &cmd->frame->pass.sgl)) {
+        megasas_write_sense(cmd, SENSE_CODE(TARGET_FAILURE));
+        cmd->frame->header.scsi_status = CHECK_CONDITION;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+
+    cmd->req = scsi_req_new(sdev, cmd->index,
+                            cmd->frame->header.lun_id, cdb, cmd);
+    if (!cmd->req) {
+        trace_megasas_scsi_req_alloc_failed(
+                mfi_frame_desc[cmd->frame->header.frame_cmd],
+                cmd->frame->header.target_id, cmd->frame->header.lun_id);
+        megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
+        cmd->frame->header.scsi_status = BUSY;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+
+    is_write = (cmd->req->cmd.mode == SCSI_XFER_TO_DEV);
+    len = megasas_enqueue_req(cmd, is_write);
+    if (len > 0) {
+        if (is_write) {
+            trace_megasas_scsi_write_start(cmd->index, len);
+        } else {
+            trace_megasas_scsi_read_start(cmd->index, len);
+        }
+    } else {
+        trace_megasas_scsi_nodata(cmd->index);
+    }
+    return MFI_STAT_INVALID_STATUS;
+}
+
+static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd)
+{
+    uint32_t lba_count, lba_start_hi, lba_start_lo;
+    uint64_t lba_start;
+    bool is_write = (cmd->frame->header.frame_cmd == MFI_CMD_LD_WRITE);
+    uint8_t cdb[16];
+    int len;
+    struct SCSIDevice *sdev = NULL;
+
+    lba_count = le32_to_cpu(cmd->frame->io.header.data_len);
+    lba_start_lo = le32_to_cpu(cmd->frame->io.lba_lo);
+    lba_start_hi = le32_to_cpu(cmd->frame->io.lba_hi);
+    lba_start = ((uint64_t)lba_start_hi << 32) | lba_start_lo;
+
+    if (cmd->frame->header.target_id < s->fw_luns) {
+        sdev = scsi_device_find(&s->bus, 0, cmd->frame->header.target_id,
+                                cmd->frame->header.lun_id);
+    }
+
+    trace_megasas_handle_io(cmd->index,
+                            mfi_frame_desc[cmd->frame->header.frame_cmd],
+                            cmd->frame->header.target_id,
+                            cmd->frame->header.lun_id,
+                            (unsigned long)lba_start, (unsigned long)lba_count);
+    if (!sdev) {
+        trace_megasas_io_target_not_present(cmd->index,
+            mfi_frame_desc[cmd->frame->header.frame_cmd],
+            cmd->frame->header.target_id, cmd->frame->header.lun_id);
+        return MFI_STAT_DEVICE_NOT_FOUND;
+    }
+
+    if (cmd->frame->header.cdb_len > 16) {
+        trace_megasas_scsi_invalid_cdb_len(
+            mfi_frame_desc[cmd->frame->header.frame_cmd], 1,
+            cmd->frame->header.target_id, cmd->frame->header.lun_id,
+            cmd->frame->header.cdb_len);
+        megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
+        cmd->frame->header.scsi_status = CHECK_CONDITION;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+
+    cmd->iov_size = lba_count * sdev->blocksize;
+    if (megasas_map_sgl(s, cmd, &cmd->frame->io.sgl)) {
+        megasas_write_sense(cmd, SENSE_CODE(TARGET_FAILURE));
+        cmd->frame->header.scsi_status = CHECK_CONDITION;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+
+    megasas_encode_lba(cdb, lba_start, lba_count, is_write);
+    cmd->req = scsi_req_new(sdev, cmd->index,
+                            cmd->frame->header.lun_id, cdb, cmd);
+    if (!cmd->req) {
+        trace_megasas_scsi_req_alloc_failed(
+            mfi_frame_desc[cmd->frame->header.frame_cmd],
+            cmd->frame->header.target_id, cmd->frame->header.lun_id);
+        megasas_write_sense(cmd, SENSE_CODE(NO_SENSE));
+        cmd->frame->header.scsi_status = BUSY;
+        s->event_count++;
+        return MFI_STAT_SCSI_DONE_WITH_ERROR;
+    }
+    len = megasas_enqueue_req(cmd, is_write);
+    if (len > 0) {
+        if (is_write) {
+            trace_megasas_io_write_start(cmd->index, lba_start, lba_count, len);
+        } else {
+            trace_megasas_io_read_start(cmd->index, lba_start, lba_count, len);
+        }
+    }
+    return MFI_STAT_INVALID_STATUS;
+}
+
+static int megasas_finish_internal_command(MegasasCmd *cmd,
+                                           SCSIRequest *req, size_t resid)
+{
+    int retval = MFI_STAT_INVALID_CMD;
+
+    if (cmd->frame->header.frame_cmd == MFI_CMD_DCMD) {
+        cmd->iov_size -= resid;
+        retval = megasas_finish_internal_dcmd(cmd, req);
+    }
+    return retval;
+}
+
+static QEMUSGList *megasas_get_sg_list(SCSIRequest *req)
+{
+    MegasasCmd *cmd = req->hba_private;
+
+    if (cmd->frame->header.frame_cmd == MFI_CMD_DCMD) {
+        return NULL;
+    } else {
+        return &cmd->qsg;
+    }
+}
+
+static void megasas_xfer_complete(SCSIRequest *req, uint32_t len)
+{
+    MegasasCmd *cmd = req->hba_private;
+    uint8_t *buf;
+    uint32_t opcode;
+
+    trace_megasas_io_complete(cmd->index, len);
+
+    if (cmd->frame->header.frame_cmd != MFI_CMD_DCMD) {
+        scsi_req_continue(req);
+        return;
+    }
+
+    buf = scsi_req_get_buf(req);
+    opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
+    if (opcode == MFI_DCMD_PD_GET_INFO && cmd->iov_buf) {
+        struct mfi_pd_info *info = cmd->iov_buf;
+
+        if (info->inquiry_data[0] == 0x7f) {
+            memset(info->inquiry_data, 0, sizeof(info->inquiry_data));
+            memcpy(info->inquiry_data, buf, len);
+        } else if (info->vpd_page83[0] == 0x7f) {
+            memset(info->vpd_page83, 0, sizeof(info->vpd_page83));
+            memcpy(info->vpd_page83, buf, len);
+        }
+        scsi_req_continue(req);
+    } else if (opcode == MFI_DCMD_LD_GET_INFO) {
+        struct mfi_ld_info *info = cmd->iov_buf;
+
+        if (cmd->iov_buf) {
+            memcpy(info->vpd_page83, buf, sizeof(info->vpd_page83));
+            scsi_req_continue(req);
+        }
+    }
+}
+
+static void megasas_command_complete(SCSIRequest *req, uint32_t status,
+                                     size_t resid)
+{
+    MegasasCmd *cmd = req->hba_private;
+    uint8_t cmd_status = MFI_STAT_OK;
+
+    trace_megasas_command_complete(cmd->index, status, resid);
+
+    if (cmd->req != req) {
+        /*
+         * Internal command complete
+         */
+        cmd_status = megasas_finish_internal_command(cmd, req, resid);
+        if (cmd_status == MFI_STAT_INVALID_STATUS) {
+            return;
+        }
+    } else {
+        req->status = status;
+        trace_megasas_scsi_complete(cmd->index, req->status,
+                                    cmd->iov_size, req->cmd.xfer);
+        if (req->status != GOOD) {
+            cmd_status = MFI_STAT_SCSI_DONE_WITH_ERROR;
+        }
+        if (req->status == CHECK_CONDITION) {
+            megasas_copy_sense(cmd);
+        }
+
+        megasas_unmap_sgl(cmd);
+        cmd->frame->header.scsi_status = req->status;
+        scsi_req_unref(cmd->req);
+        cmd->req = NULL;
+    }
+    cmd->frame->header.cmd_status = cmd_status;
+    megasas_complete_frame(cmd->state, cmd->context);
+}
+
+static void megasas_command_cancel(SCSIRequest *req)
+{
+    MegasasCmd *cmd = req->hba_private;
+
+    if (cmd) {
+        megasas_abort_command(cmd);
+    } else {
+        scsi_req_unref(req);
+    }
+}
+
+static int megasas_handle_abort(MegasasState *s, MegasasCmd *cmd)
+{
+    uint64_t abort_ctx = le64_to_cpu(cmd->frame->abort.abort_context);
+    target_phys_addr_t abort_addr, addr_hi, addr_lo;
+    MegasasCmd *abort_cmd;
+
+    addr_hi = le32_to_cpu(cmd->frame->abort.abort_mfi_addr_hi);
+    addr_lo = le32_to_cpu(cmd->frame->abort.abort_mfi_addr_lo);
+    abort_addr = ((uint64_t)addr_hi << 32) | addr_lo;
+
+    abort_cmd = megasas_lookup_frame(s, abort_addr);
+    if (!abort_cmd) {
+        trace_megasas_abort_no_cmd(cmd->index, abort_ctx);
+        s->event_count++;
+        return MFI_STAT_OK;
+    }
+    if (!megasas_use_queue64(s)) {
+        abort_ctx &= (uint64_t)0xFFFFFFFF;
+    }
+    if (abort_cmd->context != abort_ctx) {
+        trace_megasas_abort_invalid_context(cmd->index, abort_cmd->index,
+                                            abort_cmd->context);
+        s->event_count++;
+        return MFI_STAT_ABORT_NOT_POSSIBLE;
+    }
+    trace_megasas_abort_frame(cmd->index, abort_cmd->index);
+    megasas_abort_command(abort_cmd);
+    if (!s->event_cmd || abort_cmd != s->event_cmd) {
+        s->event_cmd = NULL;
+    }
+    s->event_count++;
+    return MFI_STAT_OK;
+}
+
+static void megasas_handle_frame(MegasasState *s, uint64_t frame_addr,
+                                 uint32_t frame_count)
+{
+    uint8_t frame_status = MFI_STAT_INVALID_CMD;
+    uint64_t frame_context;
+    MegasasCmd *cmd;
+
+    /*
+     * Always read 64bit context, top bits will be
+     * masked out if required in megasas_enqueue_frame()
+     */
+    frame_context = megasas_frame_get_context(frame_addr);
+
+    cmd = megasas_enqueue_frame(s, frame_addr, frame_context, frame_count);
+    if (!cmd) {
+        /* reply queue full */
+        trace_megasas_frame_busy(frame_addr);
+        megasas_frame_set_scsi_status(frame_addr, BUSY);
+        megasas_frame_set_cmd_status(frame_addr, MFI_STAT_SCSI_DONE_WITH_ERROR);
+        megasas_complete_frame(s, frame_context);
+        s->event_count++;
+        return;
+    }
+    switch (cmd->frame->header.frame_cmd) {
+    case MFI_CMD_INIT:
+        frame_status = megasas_init_firmware(s, cmd);
+        break;
+    case MFI_CMD_DCMD:
+        frame_status = megasas_handle_dcmd(s, cmd);
+        break;
+    case MFI_CMD_ABORT:
+        frame_status = megasas_handle_abort(s, cmd);
+        break;
+    case MFI_CMD_PD_SCSI_IO:
+        frame_status = megasas_handle_scsi(s, cmd, 0);
+        break;
+    case MFI_CMD_LD_SCSI_IO:
+        frame_status = megasas_handle_scsi(s, cmd, 1);
+        break;
+    case MFI_CMD_LD_READ:
+    case MFI_CMD_LD_WRITE:
+        frame_status = megasas_handle_io(s, cmd);
+        break;
+    default:
+        trace_megasas_unhandled_frame_cmd(cmd->index,
+                                          cmd->frame->header.frame_cmd);
+        s->event_count++;
+        break;
+    }
+    if (frame_status != MFI_STAT_INVALID_STATUS) {
+        if (cmd->frame) {
+            cmd->frame->header.cmd_status = frame_status;
+        } else {
+            megasas_frame_set_cmd_status(frame_addr, frame_status);
+        }
+        megasas_complete_frame(s, cmd->context);
+    }
+}
+
+static uint64_t megasas_mmio_read(void *opaque, target_phys_addr_t addr,
+                                  unsigned size)
+{
+    MegasasState *s = opaque;
+    uint32_t retval = 0;
+
+    switch (addr) {
+    case MFI_IDB:
+        retval = 0;
+        break;
+    case MFI_OMSG0:
+    case MFI_OSP0:
+        retval = (megasas_use_msix(s) ? MFI_FWSTATE_MSIX_SUPPORTED : 0) |
+            (s->fw_state & MFI_FWSTATE_MASK) |
+            ((s->fw_sge & 0xff) << 16) |
+            (s->fw_cmds & 0xFFFF);
+        break;
+    case MFI_OSTS:
+        if (megasas_intr_enabled(s) && s->doorbell) {
+            retval = MFI_1078_RM | 1;
+        }
+        break;
+    case MFI_OMSK:
+        retval = s->intr_mask;
+        break;
+    case MFI_ODCR0:
+        retval = s->doorbell;
+        break;
+    default:
+        trace_megasas_mmio_invalid_readl(addr);
+        break;
+    }
+    trace_megasas_mmio_readl(addr, retval);
+    return retval;
+}
+
+static void megasas_mmio_write(void *opaque, target_phys_addr_t addr,
+                               uint64_t val, unsigned size)
+{
+    MegasasState *s = opaque;
+    uint64_t frame_addr;
+    uint32_t frame_count;
+    int i;
+
+    trace_megasas_mmio_writel(addr, val);
+    switch (addr) {
+    case MFI_IDB:
+        if (val & MFI_FWINIT_ABORT) {
+            /* Abort all pending cmds */
+            for (i = 0; i < s->fw_cmds; i++) {
+                megasas_abort_command(&s->frames[i]);
+            }
+        }
+        if (val & MFI_FWINIT_READY) {
+            /* move to FW READY */
+            megasas_soft_reset(s);
+        }
+        if (val & MFI_FWINIT_MFIMODE) {
+            /* discard MFIs */
+        }
+        break;
+    case MFI_OMSK:
+        s->intr_mask = val;
+        if (!megasas_intr_enabled(s) && !msix_enabled(&s->dev)) {
+            trace_megasas_irq_lower();
+            qemu_irq_lower(s->dev.irq[0]);
+        }
+        if (megasas_intr_enabled(s)) {
+            trace_megasas_intr_enabled();
+        } else {
+            trace_megasas_intr_disabled();
+        }
+        break;
+    case MFI_ODCR0:
+        s->doorbell = 0;
+        if (s->producer_pa && megasas_intr_enabled(s)) {
+            /* Update reply queue pointer */
+            trace_megasas_qf_update(s->reply_queue_head, s->busy);
+            stl_le_phys(s->producer_pa, s->reply_queue_head);
+            if (!msix_enabled(&s->dev)) {
+                trace_megasas_irq_lower();
+                qemu_irq_lower(s->dev.irq[0]);
+            }
+        }
+        break;
+    case MFI_IQPH:
+        /* Received high 32 bits of a 64 bit MFI frame address */
+        s->frame_hi = val;
+        break;
+    case MFI_IQPL:
+        /* Received low 32 bits of a 64 bit MFI frame address */
+    case MFI_IQP:
+        /* Received 32 bit MFI frame address */
+        frame_addr = (val & ~0x1F);
+        /* Add possible 64 bit offset */
+        frame_addr |= ((uint64_t)s->frame_hi << 32);
+        s->frame_hi = 0;
+        frame_count = (val >> 1) & 0xF;
+        megasas_handle_frame(s, frame_addr, frame_count);
+        break;
+    default:
+        trace_megasas_mmio_invalid_writel(addr, val);
+        break;
+    }
+}
+
+static const MemoryRegionOps megasas_mmio_ops = {
+    .read = megasas_mmio_read,
+    .write = megasas_mmio_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .impl = {
+        .min_access_size = 8,
+        .max_access_size = 8,
+    }
+};
+
+static uint64_t megasas_port_read(void *opaque, target_phys_addr_t addr,
+                                  unsigned size)
+{
+    return megasas_mmio_read(opaque, addr & 0xff, size);
+}
+
+static void megasas_port_write(void *opaque, target_phys_addr_t addr,
+                               uint64_t val, unsigned size)
+{
+    megasas_mmio_write(opaque, addr & 0xff, val, size);
+}
+
+static const MemoryRegionOps megasas_port_ops = {
+    .read = megasas_port_read,
+    .write = megasas_port_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    }
+};
+
+static uint64_t megasas_queue_read(void *opaque, target_phys_addr_t addr,
+                                   unsigned size)
+{
+    return 0;
+}
+
+static const MemoryRegionOps megasas_queue_ops = {
+    .read = megasas_queue_read,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .impl = {
+        .min_access_size = 8,
+        .max_access_size = 8,
+    }
+};
+
+static void megasas_soft_reset(MegasasState *s)
+{
+    int i;
+    MegasasCmd *cmd;
+
+    trace_megasas_reset();
+    for (i = 0; i < s->fw_cmds; i++) {
+        cmd = &s->frames[i];
+        megasas_abort_command(cmd);
+    }
+    megasas_reset_frames(s);
+    s->reply_queue_len = s->fw_cmds;
+    s->reply_queue_pa = 0;
+    s->consumer_pa = 0;
+    s->producer_pa = 0;
+    s->fw_state = MFI_FWSTATE_READY;
+    s->doorbell = 0;
+    s->intr_mask = MEGASAS_INTR_DISABLED_MASK;
+    s->frame_hi = 0;
+    s->flags &= ~MEGASAS_MASK_USE_QUEUE64;
+    s->event_count++;
+    s->boot_event = s->event_count;
+}
+
+static void megasas_scsi_reset(DeviceState *dev)
+{
+    MegasasState *s = DO_UPCAST(MegasasState, dev.qdev, dev);
+
+    megasas_soft_reset(s);
+}
+
+static const VMStateDescription vmstate_megasas = {
+    .name = "megasas",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .minimum_version_id_old = 0,
+    .fields      = (VMStateField[]) {
+        VMSTATE_PCI_DEVICE(dev, MegasasState),
+
+        VMSTATE_INT32(fw_state, MegasasState),
+        VMSTATE_INT32(intr_mask, MegasasState),
+        VMSTATE_INT32(doorbell, MegasasState),
+        VMSTATE_UINT64(reply_queue_pa, MegasasState),
+        VMSTATE_UINT64(consumer_pa, MegasasState),
+        VMSTATE_UINT64(producer_pa, MegasasState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static int megasas_scsi_uninit(PCIDevice *d)
+{
+    MegasasState *s = DO_UPCAST(MegasasState, dev, d);
+
+#ifdef USE_MSIX
+    msix_uninit(&s->dev, &s->mmio_io);
+#endif
+    memory_region_destroy(&s->mmio_io);
+    memory_region_destroy(&s->port_io);
+    memory_region_destroy(&s->queue_io);
+    return 0;
+}
+
+static const struct SCSIBusInfo megasas_scsi_info = {
+    .tcq = true,
+    .max_target = MFI_MAX_LD,
+    .max_lun = 255,
+
+    .transfer_data = megasas_xfer_complete,
+    .get_sg_list = megasas_get_sg_list,
+    .complete = megasas_command_complete,
+    .cancel = megasas_command_cancel,
+};
+
+static int megasas_scsi_init(PCIDevice *dev)
+{
+    MegasasState *s = DO_UPCAST(MegasasState, dev, dev);
+    uint8_t *pci_conf;
+    int i, bar_type;
+
+    pci_conf = s->dev.config;
+
+    /* PCI latency timer = 0 */
+    pci_conf[PCI_LATENCY_TIMER] = 0;
+    /* Interrupt pin 1 */
+    pci_conf[PCI_INTERRUPT_PIN] = 0x01;
+
+    memory_region_init_io(&s->mmio_io, &megasas_mmio_ops, s,
+                          "megasas-mmio", 0x4000);
+    memory_region_init_io(&s->port_io, &megasas_port_ops, s,
+                          "megasas-io", 256);
+    memory_region_init_io(&s->queue_io, &megasas_queue_ops, s,
+                          "megasas-queue", 0x40000);
+
+#ifdef USE_MSIX
+    /* MSI-X support is currently broken */
+    if (megasas_use_msix(s) &&
+        msix_init(&s->dev, 15, &s->mmio_io, 0, 0x2000)) {
+        s->flags &= ~MEGASAS_MASK_USE_MSIX;
+    }
+#else
+    s->flags &= ~MEGASAS_MASK_USE_MSIX;
+#endif
+
+    bar_type = PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64;
+    pci_register_bar(&s->dev, 0, bar_type, &s->mmio_io);
+    pci_register_bar(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &s->port_io);
+    pci_register_bar(&s->dev, 3, bar_type, &s->queue_io);
+
+    if (megasas_use_msix(s)) {
+        msix_vector_use(&s->dev, 0);
+    }
+
+    if (s->fw_sge >= MEGASAS_MAX_SGE - MFI_PASS_FRAME_SIZE) {
+        s->fw_sge = MEGASAS_MAX_SGE - MFI_PASS_FRAME_SIZE;
+    } else if (s->fw_sge >= 128 - MFI_PASS_FRAME_SIZE) {
+        s->fw_sge = 128 - MFI_PASS_FRAME_SIZE;
+    } else {
+        s->fw_sge = 64 - MFI_PASS_FRAME_SIZE;
+    }
+    if (s->fw_cmds > MEGASAS_MAX_FRAMES) {
+        s->fw_cmds = MEGASAS_MAX_FRAMES;
+    }
+    trace_megasas_init(s->fw_sge, s->fw_cmds,
+                       megasas_use_msix(s) ? "MSI-X" : "INTx",
+                       megasas_is_jbod(s) ? "jbod" : "raid");
+    s->fw_luns = (MFI_MAX_LD > MAX_SCSI_DEVS) ?
+        MAX_SCSI_DEVS : MFI_MAX_LD;
+    s->producer_pa = 0;
+    s->consumer_pa = 0;
+    for (i = 0; i < s->fw_cmds; i++) {
+        s->frames[i].index = i;
+        s->frames[i].context = -1;
+        s->frames[i].pa = 0;
+        s->frames[i].state = s;
+    }
+
+    scsi_bus_new(&s->bus, &dev->qdev, &megasas_scsi_info);
+    scsi_bus_legacy_handle_cmdline(&s->bus);
+    return 0;
+}
+
+static Property megasas_properties[] = {
+    DEFINE_PROP_UINT32("max_sge", MegasasState, fw_sge,
+                       MEGASAS_DEFAULT_SGE),
+    DEFINE_PROP_UINT32("max_cmds", MegasasState, fw_cmds,
+                       MEGASAS_DEFAULT_FRAMES),
+#ifdef USE_MSIX
+    DEFINE_PROP_BIT("use_msix", MegasasState, flags,
+                    MEGASAS_FLAG_USE_MSIX, false),
+#endif
+    DEFINE_PROP_BIT("use_jbod", MegasasState, flags,
+                    MEGASAS_FLAG_USE_JBOD, false),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void megasas_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    PCIDeviceClass *pc = PCI_DEVICE_CLASS(oc);
+
+    pc->init = megasas_scsi_init;
+    pc->exit = megasas_scsi_uninit;
+    pc->vendor_id = PCI_VENDOR_ID_LSI_LOGIC;
+    pc->device_id = PCI_DEVICE_ID_LSI_SAS1078;
+    pc->subsystem_vendor_id = PCI_VENDOR_ID_LSI_LOGIC;
+    pc->subsystem_id = 0x1013;
+    pc->class_id = PCI_CLASS_STORAGE_RAID;
+    dc->props = megasas_properties;
+    dc->reset = megasas_scsi_reset;
+    dc->vmsd = &vmstate_megasas;
+    dc->desc = "LSI MegaRAID SAS 1078";
+}
+
+static const TypeInfo megasas_info = {
+    .name  = "megasas",
+    .parent = TYPE_PCI_DEVICE,
+    .instance_size = sizeof(MegasasState),
+    .class_init = megasas_class_init,
+};
+
+static void megasas_register_types(void)
+{
+    type_register_static(&megasas_info);
+}
+
+type_init(megasas_register_types)
diff --git a/hw/mfi.h b/hw/mfi.h
new file mode 100644
index 0000000000..8a821623e0
--- /dev/null
+++ b/hw/mfi.h
@@ -0,0 +1,1248 @@
+/*
+ * NetBSD header file, copied from
+ * http://gitorious.org/freebsd/freebsd/blobs/HEAD/sys/dev/mfi/mfireg.h
+ */
+/*-
+ * Copyright (c) 2006 IronPort Systems
+ * Copyright (c) 2007 LSI Corp.
+ * Copyright (c) 2007 Rajesh Prabhakaran.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef MFI_REG_H
+#define MFI_REG_H
+
+/*
+ * MegaRAID SAS MFI firmware definitions
+ */
+
+/*
+ * Start with the register set.  All registers are 32 bits wide.
+ * The usual Intel IOP style setup.
+ */
+#define MFI_IMSG0 0x10    /* Inbound message 0 */
+#define MFI_IMSG1 0x14    /* Inbound message 1 */
+#define MFI_OMSG0 0x18    /* Outbound message 0 */
+#define MFI_OMSG1 0x1c    /* Outbound message 1 */
+#define MFI_IDB   0x20    /* Inbound doorbell */
+#define MFI_ISTS  0x24    /* Inbound interrupt status */
+#define MFI_IMSK  0x28    /* Inbound interrupt mask */
+#define MFI_ODB   0x2c    /* Outbound doorbell */
+#define MFI_OSTS  0x30    /* Outbound interrupt status */
+#define MFI_OMSK  0x34    /* Outbound interrupt mask */
+#define MFI_IQP   0x40    /* Inbound queue port */
+#define MFI_OQP   0x44    /* Outbound queue port */
+
+/*
+ * 1078 specific related register
+ */
+#define MFI_ODR0        0x9c            /* outbound doorbell register0 */
+#define MFI_ODCR0       0xa0            /* outbound doorbell clear register0  */
+#define MFI_OSP0        0xb0            /* outbound scratch pad0  */
+#define MFI_IQPL        0xc0            /* Inbound queue port (low bytes)  */
+#define MFI_IQPH        0xc4            /* Inbound queue port (high bytes)  */
+#define MFI_DIAG        0xf8            /* Host diag */
+#define MFI_SEQ         0xfc            /* Sequencer offset */
+#define MFI_1078_EIM    0x80000004      /* 1078 enable intrrupt mask  */
+#define MFI_RMI         0x2             /* reply message interrupt  */
+#define MFI_1078_RM     0x80000000      /* reply 1078 message interrupt  */
+#define MFI_ODC         0x4             /* outbound doorbell change interrupt */
+
+/*
+ * gen2 specific changes
+ */
+#define MFI_GEN2_EIM    0x00000005      /* gen2 enable interrupt mask */
+#define MFI_GEN2_RM     0x00000001      /* reply gen2 message interrupt */
+
+/*
+ * skinny specific changes
+ */
+#define MFI_SKINNY_IDB  0x00    /* Inbound doorbell is at 0x00 for skinny */
+#define MFI_SKINNY_RM   0x00000001      /* reply skinny message interrupt */
+
+/* Bits for MFI_OSTS */
+#define MFI_OSTS_INTR_VALID     0x00000002
+
+/*
+ * Firmware state values.  Found in OMSG0 during initialization.
+ */
+#define MFI_FWSTATE_MASK                0xf0000000
+#define MFI_FWSTATE_UNDEFINED           0x00000000
+#define MFI_FWSTATE_BB_INIT             0x10000000
+#define MFI_FWSTATE_FW_INIT             0x40000000
+#define MFI_FWSTATE_WAIT_HANDSHAKE      0x60000000
+#define MFI_FWSTATE_FW_INIT_2           0x70000000
+#define MFI_FWSTATE_DEVICE_SCAN         0x80000000
+#define MFI_FWSTATE_BOOT_MSG_PENDING    0x90000000
+#define MFI_FWSTATE_FLUSH_CACHE         0xa0000000
+#define MFI_FWSTATE_READY               0xb0000000
+#define MFI_FWSTATE_OPERATIONAL         0xc0000000
+#define MFI_FWSTATE_FAULT               0xf0000000
+#define MFI_FWSTATE_MAXSGL_MASK         0x00ff0000
+#define MFI_FWSTATE_MAXCMD_MASK         0x0000ffff
+#define MFI_FWSTATE_MSIX_SUPPORTED      0x04000000
+#define MFI_FWSTATE_HOSTMEMREQD_MASK    0x08000000
+
+/*
+ * Control bits to drive the card to ready state.  These go into the IDB
+ * register.
+ */
+#define MFI_FWINIT_ABORT        0x00000001 /* Abort all pending commands */
+#define MFI_FWINIT_READY        0x00000002 /* Move from operational to ready */
+#define MFI_FWINIT_MFIMODE      0x00000004 /* unknown */
+#define MFI_FWINIT_CLEAR_HANDSHAKE 0x00000008 /* Respond to WAIT_HANDSHAKE */
+#define MFI_FWINIT_HOTPLUG      0x00000010
+#define MFI_FWINIT_STOP_ADP     0x00000020 /* Move to operational, stop */
+#define MFI_FWINIT_ADP_RESET    0x00000040 /* Reset ADP */
+
+/* MFI Commands */
+typedef enum {
+    MFI_CMD_INIT = 0x00,
+    MFI_CMD_LD_READ,
+    MFI_CMD_LD_WRITE,
+    MFI_CMD_LD_SCSI_IO,
+    MFI_CMD_PD_SCSI_IO,
+    MFI_CMD_DCMD,
+    MFI_CMD_ABORT,
+    MFI_CMD_SMP,
+    MFI_CMD_STP
+} mfi_cmd_t;
+
+/* Direct commands */
+typedef enum {
+    MFI_DCMD_CTRL_MFI_HOST_MEM_ALLOC =  0x0100e100,
+    MFI_DCMD_CTRL_GET_INFO =            0x01010000,
+    MFI_DCMD_CTRL_GET_PROPERTIES =      0x01020100,
+    MFI_DCMD_CTRL_SET_PROPERTIES =      0x01020200,
+    MFI_DCMD_CTRL_ALARM =               0x01030000,
+    MFI_DCMD_CTRL_ALARM_GET =           0x01030100,
+    MFI_DCMD_CTRL_ALARM_ENABLE =        0x01030200,
+    MFI_DCMD_CTRL_ALARM_DISABLE =       0x01030300,
+    MFI_DCMD_CTRL_ALARM_SILENCE =       0x01030400,
+    MFI_DCMD_CTRL_ALARM_TEST =          0x01030500,
+    MFI_DCMD_CTRL_EVENT_GETINFO =       0x01040100,
+    MFI_DCMD_CTRL_EVENT_CLEAR =         0x01040200,
+    MFI_DCMD_CTRL_EVENT_GET =           0x01040300,
+    MFI_DCMD_CTRL_EVENT_COUNT =         0x01040400,
+    MFI_DCMD_CTRL_EVENT_WAIT =          0x01040500,
+    MFI_DCMD_CTRL_SHUTDOWN =            0x01050000,
+    MFI_DCMD_HIBERNATE_STANDBY =        0x01060000,
+    MFI_DCMD_CTRL_GET_TIME =            0x01080101,
+    MFI_DCMD_CTRL_SET_TIME =            0x01080102,
+    MFI_DCMD_CTRL_BIOS_DATA_GET =       0x010c0100,
+    MFI_DCMD_CTRL_BIOS_DATA_SET =       0x010c0200,
+    MFI_DCMD_CTRL_FACTORY_DEFAULTS =    0x010d0000,
+    MFI_DCMD_CTRL_MFC_DEFAULTS_GET =    0x010e0201,
+    MFI_DCMD_CTRL_MFC_DEFAULTS_SET =    0x010e0202,
+    MFI_DCMD_CTRL_CACHE_FLUSH =         0x01101000,
+    MFI_DCMD_PD_GET_LIST =              0x02010000,
+    MFI_DCMD_PD_LIST_QUERY =            0x02010100,
+    MFI_DCMD_PD_GET_INFO =              0x02020000,
+    MFI_DCMD_PD_STATE_SET =             0x02030100,
+    MFI_DCMD_PD_REBUILD =               0x02040100,
+    MFI_DCMD_PD_BLINK =                 0x02070100,
+    MFI_DCMD_PD_UNBLINK =               0x02070200,
+    MFI_DCMD_LD_GET_LIST =              0x03010000,
+    MFI_DCMD_LD_GET_INFO =              0x03020000,
+    MFI_DCMD_LD_GET_PROP =              0x03030000,
+    MFI_DCMD_LD_SET_PROP =              0x03040000,
+    MFI_DCMD_LD_DELETE =                0x03090000,
+    MFI_DCMD_CFG_READ =                 0x04010000,
+    MFI_DCMD_CFG_ADD =                  0x04020000,
+    MFI_DCMD_CFG_CLEAR =                0x04030000,
+    MFI_DCMD_CFG_FOREIGN_READ =         0x04060100,
+    MFI_DCMD_CFG_FOREIGN_IMPORT =       0x04060400,
+    MFI_DCMD_BBU_STATUS =               0x05010000,
+    MFI_DCMD_BBU_CAPACITY_INFO =        0x05020000,
+    MFI_DCMD_BBU_DESIGN_INFO =          0x05030000,
+    MFI_DCMD_BBU_PROP_GET =             0x05050100,
+    MFI_DCMD_CLUSTER =                  0x08000000,
+    MFI_DCMD_CLUSTER_RESET_ALL =        0x08010100,
+    MFI_DCMD_CLUSTER_RESET_LD =         0x08010200
+} mfi_dcmd_t;
+
+/* Modifiers for MFI_DCMD_CTRL_FLUSHCACHE */
+#define MFI_FLUSHCACHE_CTRL     0x01
+#define MFI_FLUSHCACHE_DISK     0x02
+
+/* Modifiers for MFI_DCMD_CTRL_SHUTDOWN */
+#define MFI_SHUTDOWN_SPINDOWN   0x01
+
+/*
+ * MFI Frame flags
+ */
+typedef enum {
+    MFI_FRAME_DONT_POST_IN_REPLY_QUEUE =        0x0001,
+    MFI_FRAME_SGL64 =                           0x0002,
+    MFI_FRAME_SENSE64 =                         0x0004,
+    MFI_FRAME_DIR_WRITE =                       0x0008,
+    MFI_FRAME_DIR_READ =                        0x0010,
+    MFI_FRAME_IEEE_SGL =                        0x0020,
+} mfi_frame_flags;
+
+/* MFI Status codes */
+typedef enum {
+    MFI_STAT_OK =                       0x00,
+    MFI_STAT_INVALID_CMD,
+    MFI_STAT_INVALID_DCMD,
+    MFI_STAT_INVALID_PARAMETER,
+    MFI_STAT_INVALID_SEQUENCE_NUMBER,
+    MFI_STAT_ABORT_NOT_POSSIBLE,
+    MFI_STAT_APP_HOST_CODE_NOT_FOUND,
+    MFI_STAT_APP_IN_USE,
+    MFI_STAT_APP_NOT_INITIALIZED,
+    MFI_STAT_ARRAY_INDEX_INVALID,
+    MFI_STAT_ARRAY_ROW_NOT_EMPTY,
+    MFI_STAT_CONFIG_RESOURCE_CONFLICT,
+    MFI_STAT_DEVICE_NOT_FOUND,
+    MFI_STAT_DRIVE_TOO_SMALL,
+    MFI_STAT_FLASH_ALLOC_FAIL,
+    MFI_STAT_FLASH_BUSY,
+    MFI_STAT_FLASH_ERROR =              0x10,
+    MFI_STAT_FLASH_IMAGE_BAD,
+    MFI_STAT_FLASH_IMAGE_INCOMPLETE,
+    MFI_STAT_FLASH_NOT_OPEN,
+    MFI_STAT_FLASH_NOT_STARTED,
+    MFI_STAT_FLUSH_FAILED,
+    MFI_STAT_HOST_CODE_NOT_FOUNT,
+    MFI_STAT_LD_CC_IN_PROGRESS,
+    MFI_STAT_LD_INIT_IN_PROGRESS,
+    MFI_STAT_LD_LBA_OUT_OF_RANGE,
+    MFI_STAT_LD_MAX_CONFIGURED,
+    MFI_STAT_LD_NOT_OPTIMAL,
+    MFI_STAT_LD_RBLD_IN_PROGRESS,
+    MFI_STAT_LD_RECON_IN_PROGRESS,
+    MFI_STAT_LD_WRONG_RAID_LEVEL,
+    MFI_STAT_MAX_SPARES_EXCEEDED,
+    MFI_STAT_MEMORY_NOT_AVAILABLE =     0x20,
+    MFI_STAT_MFC_HW_ERROR,
+    MFI_STAT_NO_HW_PRESENT,
+    MFI_STAT_NOT_FOUND,
+    MFI_STAT_NOT_IN_ENCL,
+    MFI_STAT_PD_CLEAR_IN_PROGRESS,
+    MFI_STAT_PD_TYPE_WRONG,
+    MFI_STAT_PR_DISABLED,
+    MFI_STAT_ROW_INDEX_INVALID,
+    MFI_STAT_SAS_CONFIG_INVALID_ACTION,
+    MFI_STAT_SAS_CONFIG_INVALID_DATA,
+    MFI_STAT_SAS_CONFIG_INVALID_PAGE,
+    MFI_STAT_SAS_CONFIG_INVALID_TYPE,
+    MFI_STAT_SCSI_DONE_WITH_ERROR,
+    MFI_STAT_SCSI_IO_FAILED,
+    MFI_STAT_SCSI_RESERVATION_CONFLICT,
+    MFI_STAT_SHUTDOWN_FAILED =          0x30,
+    MFI_STAT_TIME_NOT_SET,
+    MFI_STAT_WRONG_STATE,
+    MFI_STAT_LD_OFFLINE,
+    MFI_STAT_PEER_NOTIFICATION_REJECTED,
+    MFI_STAT_PEER_NOTIFICATION_FAILED,
+    MFI_STAT_RESERVATION_IN_PROGRESS,
+    MFI_STAT_I2C_ERRORS_DETECTED,
+    MFI_STAT_PCI_ERRORS_DETECTED,
+    MFI_STAT_DIAG_FAILED,
+    MFI_STAT_BOOT_MSG_PENDING,
+    MFI_STAT_FOREIGN_CONFIG_INCOMPLETE,
+    MFI_STAT_INVALID_SGL,
+    MFI_STAT_UNSUPPORTED_HW,
+    MFI_STAT_CC_SCHEDULE_DISABLED,
+    MFI_STAT_PD_COPYBACK_IN_PROGRESS,
+    MFI_STAT_MULTIPLE_PDS_IN_ARRAY =    0x40,
+    MFI_STAT_FW_DOWNLOAD_ERROR,
+    MFI_STAT_FEATURE_SECURITY_NOT_ENABLED,
+    MFI_STAT_LOCK_KEY_ALREADY_EXISTS,
+    MFI_STAT_LOCK_KEY_BACKUP_NOT_ALLOWED,
+    MFI_STAT_LOCK_KEY_VERIFY_NOT_ALLOWED,
+    MFI_STAT_LOCK_KEY_VERIFY_FAILED,
+    MFI_STAT_LOCK_KEY_REKEY_NOT_ALLOWED,
+    MFI_STAT_LOCK_KEY_INVALID,
+    MFI_STAT_LOCK_KEY_ESCROW_INVALID,
+    MFI_STAT_LOCK_KEY_BACKUP_REQUIRED,
+    MFI_STAT_SECURE_LD_EXISTS,
+    MFI_STAT_LD_SECURE_NOT_ALLOWED,
+    MFI_STAT_REPROVISION_NOT_ALLOWED,
+    MFI_STAT_PD_SECURITY_TYPE_WRONG,
+    MFI_STAT_LD_ENCRYPTION_TYPE_INVALID,
+    MFI_STAT_CONFIG_FDE_NON_FDE_MIX_NOT_ALLOWED = 0x50,
+    MFI_STAT_CONFIG_LD_ENCRYPTION_TYPE_MIX_NOT_ALLOWED,
+    MFI_STAT_SECRET_KEY_NOT_ALLOWED,
+    MFI_STAT_PD_HW_ERRORS_DETECTED,
+    MFI_STAT_LD_CACHE_PINNED,
+    MFI_STAT_POWER_STATE_SET_IN_PROGRESS,
+    MFI_STAT_POWER_STATE_SET_BUSY,
+    MFI_STAT_POWER_STATE_WRONG,
+    MFI_STAT_PR_NO_AVAILABLE_PD_FOUND,
+    MFI_STAT_CTRL_RESET_REQUIRED,
+    MFI_STAT_LOCK_KEY_EKM_NO_BOOT_AGENT,
+    MFI_STAT_SNAP_NO_SPACE,
+    MFI_STAT_SNAP_PARTIAL_FAILURE,
+    MFI_STAT_UPGRADE_KEY_INCOMPATIBLE,
+    MFI_STAT_PFK_INCOMPATIBLE,
+    MFI_STAT_PD_MAX_UNCONFIGURED,
+    MFI_STAT_IO_METRICS_DISABLED =      0x60,
+    MFI_STAT_AEC_NOT_STOPPED,
+    MFI_STAT_PI_TYPE_WRONG,
+    MFI_STAT_LD_PD_PI_INCOMPATIBLE,
+    MFI_STAT_PI_NOT_ENABLED,
+    MFI_STAT_LD_BLOCK_SIZE_MISMATCH,
+    MFI_STAT_INVALID_STATUS =           0xFF
+} mfi_status_t;
+
+/* Event classes */
+typedef enum {
+    MFI_EVT_CLASS_DEBUG =      -2,
+    MFI_EVT_CLASS_PROGRESS =   -1,
+    MFI_EVT_CLASS_INFO =        0,
+    MFI_EVT_CLASS_WARNING =     1,
+    MFI_EVT_CLASS_CRITICAL =    2,
+    MFI_EVT_CLASS_FATAL =       3,
+    MFI_EVT_CLASS_DEAD =        4
+} mfi_evt_class_t;
+
+/* Event locales */
+typedef enum {
+    MFI_EVT_LOCALE_LD =         0x0001,
+    MFI_EVT_LOCALE_PD =         0x0002,
+    MFI_EVT_LOCALE_ENCL =       0x0004,
+    MFI_EVT_LOCALE_BBU =        0x0008,
+    MFI_EVT_LOCALE_SAS =        0x0010,
+    MFI_EVT_LOCALE_CTRL =       0x0020,
+    MFI_EVT_LOCALE_CONFIG =     0x0040,
+    MFI_EVT_LOCALE_CLUSTER =    0x0080,
+    MFI_EVT_LOCALE_ALL =        0xffff
+} mfi_evt_locale_t;
+
+/* Event args */
+typedef enum {
+    MR_EVT_ARGS_NONE =          0x00,
+    MR_EVT_ARGS_CDB_SENSE,
+    MR_EVT_ARGS_LD,
+    MR_EVT_ARGS_LD_COUNT,
+    MR_EVT_ARGS_LD_LBA,
+    MR_EVT_ARGS_LD_OWNER,
+    MR_EVT_ARGS_LD_LBA_PD_LBA,
+    MR_EVT_ARGS_LD_PROG,
+    MR_EVT_ARGS_LD_STATE,
+    MR_EVT_ARGS_LD_STRIP,
+    MR_EVT_ARGS_PD,
+    MR_EVT_ARGS_PD_ERR,
+    MR_EVT_ARGS_PD_LBA,
+    MR_EVT_ARGS_PD_LBA_LD,
+    MR_EVT_ARGS_PD_PROG,
+    MR_EVT_ARGS_PD_STATE,
+    MR_EVT_ARGS_PCI,
+    MR_EVT_ARGS_RATE,
+    MR_EVT_ARGS_STR,
+    MR_EVT_ARGS_TIME,
+    MR_EVT_ARGS_ECC,
+    MR_EVT_ARGS_LD_PROP,
+    MR_EVT_ARGS_PD_SPARE,
+    MR_EVT_ARGS_PD_INDEX,
+    MR_EVT_ARGS_DIAG_PASS,
+    MR_EVT_ARGS_DIAG_FAIL,
+    MR_EVT_ARGS_PD_LBA_LBA,
+    MR_EVT_ARGS_PORT_PHY,
+    MR_EVT_ARGS_PD_MISSING,
+    MR_EVT_ARGS_PD_ADDRESS,
+    MR_EVT_ARGS_BITMAP,
+    MR_EVT_ARGS_CONNECTOR,
+    MR_EVT_ARGS_PD_PD,
+    MR_EVT_ARGS_PD_FRU,
+    MR_EVT_ARGS_PD_PATHINFO,
+    MR_EVT_ARGS_PD_POWER_STATE,
+    MR_EVT_ARGS_GENERIC,
+} mfi_evt_args;
+
+/* Event codes */
+#define MR_EVT_CFG_CLEARED                          0x0004
+#define MR_EVT_CTRL_SHUTDOWN                        0x002a
+#define MR_EVT_LD_STATE_CHANGE                      0x0051
+#define MR_EVT_PD_INSERTED                          0x005b
+#define MR_EVT_PD_REMOVED                           0x0070
+#define MR_EVT_PD_STATE_CHANGED                     0x0072
+#define MR_EVT_LD_CREATED                           0x008a
+#define MR_EVT_LD_DELETED                           0x008b
+#define MR_EVT_FOREIGN_CFG_IMPORTED                 0x00db
+#define MR_EVT_LD_OFFLINE                           0x00fc
+#define MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED         0x0152
+
+typedef enum {
+    MR_LD_CACHE_WRITE_BACK =            0x01,
+    MR_LD_CACHE_WRITE_ADAPTIVE =        0x02,
+    MR_LD_CACHE_READ_AHEAD =            0x04,
+    MR_LD_CACHE_READ_ADAPTIVE =         0x08,
+    MR_LD_CACHE_WRITE_CACHE_BAD_BBU =   0x10,
+    MR_LD_CACHE_ALLOW_WRITE_CACHE =     0x20,
+    MR_LD_CACHE_ALLOW_READ_CACHE =      0x40
+} mfi_ld_cache;
+
+typedef enum {
+    MR_PD_CACHE_UNCHANGED  =    0,
+    MR_PD_CACHE_ENABLE =        1,
+    MR_PD_CACHE_DISABLE =       2
+} mfi_pd_cache;
+
+typedef enum {
+    MR_PD_QUERY_TYPE_ALL =              0,
+    MR_PD_QUERY_TYPE_STATE =            1,
+    MR_PD_QUERY_TYPE_POWER_STATE =      2,
+    MR_PD_QUERY_TYPE_MEDIA_TYPE =       3,
+    MR_PD_QUERY_TYPE_SPEED =            4,
+    MR_PD_QUERY_TYPE_EXPOSED_TO_HOST =  5, /*query for system drives */
+} mfi_pd_query_type;
+
+/*
+ * Other propertities and definitions
+ */
+#define MFI_MAX_PD_CHANNELS     2
+#define MFI_MAX_LD_CHANNELS     2
+#define MFI_MAX_CHANNELS        (MFI_MAX_PD_CHANNELS + MFI_MAX_LD_CHANNELS)
+#define MFI_MAX_CHANNEL_DEVS  128
+#define MFI_DEFAULT_ID         -1
+#define MFI_MAX_LUN             8
+#define MFI_MAX_LD             64
+
+#define MFI_FRAME_SIZE         64
+#define MFI_MBOX_SIZE          12
+
+/* Firmware flashing can take 40s */
+#define MFI_POLL_TIMEOUT_SECS  50
+
+/* Allow for speedier math calculations */
+#define MFI_SECTOR_LEN        512
+
+/* Scatter Gather elements */
+struct mfi_sg32 {
+    uint32_t addr;
+    uint32_t len;
+} __attribute__ ((packed));
+
+struct mfi_sg64 {
+    uint64_t addr;
+    uint32_t len;
+} __attribute__ ((packed));
+
+struct mfi_sg_skinny {
+    uint64_t addr;
+    uint32_t len;
+    uint32_t flag;
+} __attribute__ ((packed));
+
+union mfi_sgl {
+    struct mfi_sg32 sg32[1];
+    struct mfi_sg64 sg64[1];
+    struct mfi_sg_skinny sg_skinny[1];
+} __attribute__ ((packed));
+
+/* Message frames.  All messages have a common header */
+struct mfi_frame_header {
+    uint8_t frame_cmd;
+    uint8_t sense_len;
+    uint8_t cmd_status;
+    uint8_t scsi_status;
+    uint8_t target_id;
+    uint8_t lun_id;
+    uint8_t cdb_len;
+    uint8_t sge_count;
+    uint64_t context;
+    uint16_t flags;
+    uint16_t timeout;
+    uint32_t data_len;
+} __attribute__ ((packed));
+
+struct mfi_init_frame {
+    struct mfi_frame_header header;
+    uint32_t qinfo_new_addr_lo;
+    uint32_t qinfo_new_addr_hi;
+    uint32_t qinfo_old_addr_lo;
+    uint32_t qinfo_old_addr_hi;
+    uint32_t reserved[6];
+};
+
+#define MFI_IO_FRAME_SIZE 40
+struct mfi_io_frame {
+    struct mfi_frame_header header;
+    uint32_t sense_addr_lo;
+    uint32_t sense_addr_hi;
+    uint32_t lba_lo;
+    uint32_t lba_hi;
+    union mfi_sgl sgl;
+} __attribute__ ((packed));
+
+#define MFI_PASS_FRAME_SIZE 48
+struct mfi_pass_frame {
+    struct mfi_frame_header header;
+    uint32_t sense_addr_lo;
+    uint32_t sense_addr_hi;
+    uint8_t cdb[16];
+    union mfi_sgl sgl;
+} __attribute__ ((packed));
+
+#define MFI_DCMD_FRAME_SIZE 40
+struct mfi_dcmd_frame {
+    struct mfi_frame_header header;
+    uint32_t opcode;
+    uint8_t mbox[MFI_MBOX_SIZE];
+    union mfi_sgl sgl;
+} __attribute__ ((packed));
+
+struct mfi_abort_frame {
+    struct mfi_frame_header header;
+    uint64_t abort_context;
+    uint32_t abort_mfi_addr_lo;
+    uint32_t abort_mfi_addr_hi;
+    uint32_t reserved1[6];
+} __attribute__ ((packed));
+
+struct mfi_smp_frame {
+    struct mfi_frame_header header;
+    uint64_t sas_addr;
+    union {
+        struct mfi_sg32 sg32[2];
+        struct mfi_sg64 sg64[2];
+    } sgl;
+} __attribute__ ((packed));
+
+struct mfi_stp_frame {
+    struct mfi_frame_header header;
+    uint16_t fis[10];
+    uint32_t stp_flags;
+    union {
+        struct mfi_sg32 sg32[2];
+        struct mfi_sg64 sg64[2];
+    } sgl;
+} __attribute__ ((packed));
+
+union mfi_frame {
+    struct mfi_frame_header header;
+    struct mfi_init_frame init;
+    struct mfi_io_frame io;
+    struct mfi_pass_frame pass;
+    struct mfi_dcmd_frame dcmd;
+    struct mfi_abort_frame abort;
+    struct mfi_smp_frame smp;
+    struct mfi_stp_frame stp;
+    uint64_t raw[8];
+    uint8_t bytes[MFI_FRAME_SIZE];
+};
+
+#define MFI_SENSE_LEN 128
+struct mfi_sense {
+    uint8_t     data[MFI_SENSE_LEN];
+};
+
+#define MFI_QUEUE_FLAG_CONTEXT64 0x00000002
+
+/* The queue init structure that is passed with the init message */
+struct mfi_init_qinfo {
+    uint32_t flags;
+    uint32_t rq_entries;
+    uint32_t rq_addr_lo;
+    uint32_t rq_addr_hi;
+    uint32_t pi_addr_lo;
+    uint32_t pi_addr_hi;
+    uint32_t ci_addr_lo;
+    uint32_t ci_addr_hi;
+} __attribute__ ((packed));
+
+/* Controller properties */
+struct mfi_ctrl_props {
+    uint16_t seq_num;
+    uint16_t pred_fail_poll_interval;
+    uint16_t intr_throttle_cnt;
+    uint16_t intr_throttle_timeout;
+    uint8_t rebuild_rate;
+    uint8_t patrol_read_rate;
+    uint8_t bgi_rate;
+    uint8_t cc_rate;
+    uint8_t recon_rate;
+    uint8_t cache_flush_interval;
+    uint8_t spinup_drv_cnt;
+    uint8_t spinup_delay;
+    uint8_t cluster_enable;
+    uint8_t coercion_mode;
+    uint8_t alarm_enable;
+    uint8_t disable_auto_rebuild;
+    uint8_t disable_battery_warn;
+    uint8_t ecc_bucket_size;
+    uint16_t ecc_bucket_leak_rate;
+    uint8_t restore_hotspare_on_insertion;
+    uint8_t expose_encl_devices;
+    uint8_t maintainPdFailHistory;
+    uint8_t disallowHostRequestReordering;
+    uint8_t abortCCOnError;
+    uint8_t loadBalanceMode;
+    uint8_t disableAutoDetectBackplane;
+    uint8_t snapVDSpace;
+    uint32_t OnOffProperties;
+/* set TRUE to disable copyBack (0=copyback enabled) */
+#define MFI_CTRL_PROP_CopyBackDisabled           (1 << 0)
+#define MFI_CTRL_PROP_SMARTerEnabled             (1 << 1)
+#define MFI_CTRL_PROP_PRCorrectUnconfiguredAreas (1 << 2)
+#define MFI_CTRL_PROP_UseFdeOnly                 (1 << 3)
+#define MFI_CTRL_PROP_DisableNCQ                 (1 << 4)
+#define MFI_CTRL_PROP_SSDSMARTerEnabled          (1 << 5)
+#define MFI_CTRL_PROP_SSDPatrolReadEnabled       (1 << 6)
+#define MFI_CTRL_PROP_EnableSpinDownUnconfigured (1 << 7)
+#define MFI_CTRL_PROP_AutoEnhancedImport         (1 << 8)
+#define MFI_CTRL_PROP_EnableSecretKeyControl     (1 << 9)
+#define MFI_CTRL_PROP_DisableOnlineCtrlReset     (1 << 10)
+#define MFI_CTRL_PROP_AllowBootWithPinnedCache   (1 << 11)
+#define MFI_CTRL_PROP_DisableSpinDownHS          (1 << 12)
+#define MFI_CTRL_PROP_EnableJBOD                 (1 << 13)
+
+    uint8_t autoSnapVDSpace; /* % of source LD to be
+                              * reserved for auto snapshot
+                              * in snapshot repository, for
+                              * metadata and user data
+                              * 1=5%, 2=10%, 3=15% and so on
+                              */
+    uint8_t viewSpace;       /* snapshot writeable VIEWs
+                              * capacity as a % of source LD
+                              * capacity. 0=READ only
+                              * 1=5%, 2=10%, 3=15% and so on
+                              */
+    uint16_t spinDownTime;    /* # of idle minutes before device
+                               * is spun down (0=use FW defaults)
+                               */
+    uint8_t reserved[24];
+} __attribute__ ((packed));
+
+/* PCI information about the card. */
+struct mfi_info_pci {
+    uint16_t vendor;
+    uint16_t device;
+    uint16_t subvendor;
+    uint16_t subdevice;
+    uint8_t reserved[24];
+} __attribute__ ((packed));
+
+/* Host (front end) interface information */
+struct mfi_info_host {
+    uint8_t type;
+#define MFI_INFO_HOST_PCIX      0x01
+#define MFI_INFO_HOST_PCIE      0x02
+#define MFI_INFO_HOST_ISCSI     0x04
+#define MFI_INFO_HOST_SAS3G     0x08
+    uint8_t reserved[6];
+    uint8_t port_count;
+    uint64_t port_addr[8];
+} __attribute__ ((packed));
+
+/* Device (back end) interface information */
+struct mfi_info_device {
+    uint8_t type;
+#define MFI_INFO_DEV_SPI        0x01
+#define MFI_INFO_DEV_SAS3G      0x02
+#define MFI_INFO_DEV_SATA1      0x04
+#define MFI_INFO_DEV_SATA3G     0x08
+    uint8_t reserved[6];
+    uint8_t port_count;
+    uint64_t port_addr[8];
+} __attribute__ ((packed));
+
+/* Firmware component information */
+struct mfi_info_component {
+    char name[8];
+    char version[32];
+    char build_date[16];
+    char build_time[16];
+} __attribute__ ((packed));
+
+/* Controller default settings */
+struct mfi_defaults {
+    uint64_t sas_addr;
+    uint8_t phy_polarity;
+    uint8_t background_rate;
+    uint8_t stripe_size;
+    uint8_t flush_time;
+    uint8_t write_back;
+    uint8_t read_ahead;
+    uint8_t cache_when_bbu_bad;
+    uint8_t cached_io;
+    uint8_t smart_mode;
+    uint8_t alarm_disable;
+    uint8_t coercion;
+    uint8_t zrc_config;
+    uint8_t dirty_led_shows_drive_activity;
+    uint8_t bios_continue_on_error;
+    uint8_t spindown_mode;
+    uint8_t allowed_device_types;
+    uint8_t allow_mix_in_enclosure;
+    uint8_t allow_mix_in_ld;
+    uint8_t allow_sata_in_cluster;
+    uint8_t max_chained_enclosures;
+    uint8_t disable_ctrl_r;
+    uint8_t enable_web_bios;
+    uint8_t phy_polarity_split;
+    uint8_t direct_pd_mapping;
+    uint8_t bios_enumerate_lds;
+    uint8_t restored_hot_spare_on_insertion;
+    uint8_t expose_enclosure_devices;
+    uint8_t maintain_pd_fail_history;
+    uint8_t disable_puncture;
+    uint8_t zero_based_enumeration;
+    uint8_t disable_preboot_cli;
+    uint8_t show_drive_led_on_activity;
+    uint8_t cluster_disable;
+    uint8_t sas_disable;
+    uint8_t auto_detect_backplane;
+    uint8_t fde_only;
+    uint8_t delay_during_post;
+    uint8_t resv[19];
+} __attribute__ ((packed));
+
+/* Controller default settings */
+struct mfi_bios_data {
+    uint16_t boot_target_id;
+    uint8_t do_not_int_13;
+    uint8_t continue_on_error;
+    uint8_t verbose;
+    uint8_t geometry;
+    uint8_t expose_all_drives;
+    uint8_t reserved[56];
+    uint8_t check_sum;
+} __attribute__ ((packed));
+
+/* SAS (?) controller info, returned from MFI_DCMD_CTRL_GETINFO. */
+struct mfi_ctrl_info {
+    struct mfi_info_pci pci;
+    struct mfi_info_host host;
+    struct mfi_info_device device;
+
+    /* Firmware components that are present and active. */
+    uint32_t image_check_word;
+    uint32_t image_component_count;
+    struct mfi_info_component image_component[8];
+
+    /* Firmware components that have been flashed but are inactive */
+    uint32_t pending_image_component_count;
+    struct mfi_info_component pending_image_component[8];
+
+    uint8_t max_arms;
+    uint8_t max_spans;
+    uint8_t max_arrays;
+    uint8_t max_lds;
+    char product_name[80];
+    char serial_number[32];
+    uint32_t hw_present;
+#define MFI_INFO_HW_BBU         0x01
+#define MFI_INFO_HW_ALARM       0x02
+#define MFI_INFO_HW_NVRAM       0x04
+#define MFI_INFO_HW_UART        0x08
+#define MFI_INFO_HW_MEM         0x10
+#define MFI_INFO_HW_FLASH       0x20
+    uint32_t current_fw_time;
+    uint16_t max_cmds;
+    uint16_t max_sg_elements;
+    uint32_t max_request_size;
+    uint16_t lds_present;
+    uint16_t lds_degraded;
+    uint16_t lds_offline;
+    uint16_t pd_present;
+    uint16_t pd_disks_present;
+    uint16_t pd_disks_pred_failure;
+    uint16_t pd_disks_failed;
+    uint16_t nvram_size;
+    uint16_t memory_size;
+    uint16_t flash_size;
+    uint16_t ram_correctable_errors;
+    uint16_t ram_uncorrectable_errors;
+    uint8_t cluster_allowed;
+    uint8_t cluster_active;
+    uint16_t max_strips_per_io;
+
+    uint32_t raid_levels;
+#define MFI_INFO_RAID_0         0x01
+#define MFI_INFO_RAID_1         0x02
+#define MFI_INFO_RAID_5         0x04
+#define MFI_INFO_RAID_1E        0x08
+#define MFI_INFO_RAID_6         0x10
+
+    uint32_t adapter_ops;
+#define MFI_INFO_AOPS_RBLD_RATE         0x0001
+#define MFI_INFO_AOPS_CC_RATE           0x0002
+#define MFI_INFO_AOPS_BGI_RATE          0x0004
+#define MFI_INFO_AOPS_RECON_RATE        0x0008
+#define MFI_INFO_AOPS_PATROL_RATE       0x0010
+#define MFI_INFO_AOPS_ALARM_CONTROL     0x0020
+#define MFI_INFO_AOPS_CLUSTER_SUPPORTED 0x0040
+#define MFI_INFO_AOPS_BBU               0x0080
+#define MFI_INFO_AOPS_SPANNING_ALLOWED  0x0100
+#define MFI_INFO_AOPS_DEDICATED_SPARES  0x0200
+#define MFI_INFO_AOPS_REVERTIBLE_SPARES 0x0400
+#define MFI_INFO_AOPS_FOREIGN_IMPORT    0x0800
+#define MFI_INFO_AOPS_SELF_DIAGNOSTIC   0x1000
+#define MFI_INFO_AOPS_MIXED_ARRAY       0x2000
+#define MFI_INFO_AOPS_GLOBAL_SPARES     0x4000
+
+    uint32_t ld_ops;
+#define MFI_INFO_LDOPS_READ_POLICY      0x01
+#define MFI_INFO_LDOPS_WRITE_POLICY     0x02
+#define MFI_INFO_LDOPS_IO_POLICY        0x04
+#define MFI_INFO_LDOPS_ACCESS_POLICY    0x08
+#define MFI_INFO_LDOPS_DISK_CACHE_POLICY 0x10
+
+    struct {
+        uint8_t min;
+        uint8_t max;
+        uint8_t reserved[2];
+    } __attribute__ ((packed)) stripe_sz_ops;
+
+    uint32_t pd_ops;
+#define MFI_INFO_PDOPS_FORCE_ONLINE     0x01
+#define MFI_INFO_PDOPS_FORCE_OFFLINE    0x02
+#define MFI_INFO_PDOPS_FORCE_REBUILD    0x04
+
+    uint32_t pd_mix_support;
+#define MFI_INFO_PDMIX_SAS              0x01
+#define MFI_INFO_PDMIX_SATA             0x02
+#define MFI_INFO_PDMIX_ENCL             0x04
+#define MFI_INFO_PDMIX_LD               0x08
+#define MFI_INFO_PDMIX_SATA_CLUSTER     0x10
+
+    uint8_t ecc_bucket_count;
+    uint8_t reserved2[11];
+    struct mfi_ctrl_props properties;
+    char package_version[0x60];
+    uint8_t pad[0x800 - 0x6a0];
+} __attribute__ ((packed));
+
+/* keep track of an event. */
+union mfi_evt {
+    struct {
+        uint16_t locale;
+        uint8_t reserved;
+        int8_t class;
+    } members;
+    uint32_t word;
+} __attribute__ ((packed));
+
+/* event log state. */
+struct mfi_evt_log_state {
+    uint32_t newest_seq_num;
+    uint32_t oldest_seq_num;
+    uint32_t clear_seq_num;
+    uint32_t shutdown_seq_num;
+    uint32_t boot_seq_num;
+} __attribute__ ((packed));
+
+struct mfi_progress {
+    uint16_t progress;
+    uint16_t elapsed_seconds;
+} __attribute__ ((packed));
+
+struct mfi_evt_ld {
+    uint16_t target_id;
+    uint8_t ld_index;
+    uint8_t reserved;
+} __attribute__ ((packed));
+
+struct mfi_evt_pd {
+    uint16_t device_id;
+    uint8_t enclosure_index;
+    uint8_t slot_number;
+} __attribute__ ((packed));
+
+/* event detail, returned from MFI_DCMD_CTRL_EVENT_WAIT. */
+struct mfi_evt_detail {
+    uint32_t seq;
+    uint32_t time;
+    uint32_t code;
+    union mfi_evt class;
+    uint8_t arg_type;
+    uint8_t reserved1[15];
+
+    union {
+        struct {
+            struct mfi_evt_pd pd;
+            uint8_t cdb_len;
+            uint8_t sense_len;
+            uint8_t reserved[2];
+            uint8_t cdb[16];
+            uint8_t sense[64];
+        } cdb_sense;
+
+        struct mfi_evt_ld ld;
+
+        struct {
+            struct mfi_evt_ld ld;
+            uint64_t count;
+        } ld_count;
+
+        struct {
+            uint64_t lba;
+            struct mfi_evt_ld ld;
+        } ld_lba;
+
+        struct {
+            struct mfi_evt_ld ld;
+            uint32_t pre_owner;
+            uint32_t new_owner;
+        } ld_owner;
+
+        struct {
+            uint64_t ld_lba;
+            uint64_t pd_lba;
+            struct mfi_evt_ld ld;
+            struct mfi_evt_pd pd;
+        } ld_lba_pd_lba;
+
+        struct {
+            struct mfi_evt_ld ld;
+            struct mfi_progress prog;
+        } ld_prog;
+
+        struct {
+            struct mfi_evt_ld ld;
+            uint32_t prev_state;
+            uint32_t new_state;
+        } ld_state;
+
+        struct {
+            uint64_t strip;
+            struct mfi_evt_ld ld;
+        } ld_strip;
+
+        struct mfi_evt_pd pd;
+
+        struct {
+            struct mfi_evt_pd pd;
+            uint32_t err;
+        } pd_err;
+
+        struct {
+            uint64_t lba;
+            struct mfi_evt_pd pd;
+        } pd_lba;
+
+        struct {
+            uint64_t lba;
+            struct mfi_evt_pd pd;
+            struct mfi_evt_ld ld;
+        } pd_lba_ld;
+
+        struct {
+            struct mfi_evt_pd pd;
+            struct mfi_progress prog;
+        } pd_prog;
+
+        struct {
+            struct mfi_evt_pd ld;
+            uint32_t prev_state;
+            uint32_t new_state;
+        } pd_state;
+
+        struct {
+            uint16_t venderId;
+            uint16_t deviceId;
+            uint16_t subVenderId;
+            uint16_t subDeviceId;
+        } pci;
+
+        uint32_t rate;
+
+        char str[96];
+
+        struct {
+            uint32_t rtc;
+            uint16_t elapsedSeconds;
+        } time;
+
+        struct {
+            uint32_t ecar;
+            uint32_t elog;
+            char str[64];
+        } ecc;
+
+        uint8_t b[96];
+        uint16_t s[48];
+        uint32_t w[24];
+        uint64_t d[12];
+    } args;
+
+    char description[128];
+} __attribute__ ((packed));
+
+struct mfi_evt_list {
+    uint32_t count;
+    uint32_t reserved;
+    struct mfi_evt_detail event[1];
+} __attribute__ ((packed));
+
+union mfi_pd_ref {
+    struct {
+        uint16_t device_id;
+        uint16_t seq_num;
+    } v;
+    uint32_t ref;
+} __attribute__ ((packed));
+
+union mfi_pd_ddf_type {
+    struct {
+        uint16_t pd_type;
+#define MFI_PD_DDF_TYPE_FORCED_PD_GUID (1 << 0)
+#define MFI_PD_DDF_TYPE_IN_VD          (1 << 1)
+#define MFI_PD_DDF_TYPE_IS_GLOBAL_SPARE (1 << 2)
+#define MFI_PD_DDF_TYPE_IS_SPARE        (1 << 3)
+#define MFI_PD_DDF_TYPE_IS_FOREIGN      (1 << 4)
+#define MFI_PD_DDF_TYPE_INTF_SPI        (1 << 12)
+#define MFI_PD_DDF_TYPE_INTF_SAS        (1 << 13)
+#define MFI_PD_DDF_TYPE_INTF_SATA1      (1 << 14)
+#define MFI_PD_DDF_TYPE_INTF_SATA3G     (1 << 15)
+        uint16_t reserved;
+    } ddf;
+    struct {
+        uint32_t reserved;
+    } non_disk;
+    uint32_t type;
+} __attribute__ ((packed));
+
+struct mfi_pd_progress {
+    uint32_t active;
+#define PD_PROGRESS_ACTIVE_REBUILD (1 << 0)
+#define PD_PROGRESS_ACTIVE_PATROL  (1 << 1)
+#define PD_PROGRESS_ACTIVE_CLEAR   (1 << 2)
+    struct mfi_progress rbld;
+    struct mfi_progress patrol;
+    struct mfi_progress clear;
+    struct mfi_progress reserved[4];
+} __attribute__ ((packed));
+
+struct mfi_pd_info {
+    union mfi_pd_ref ref;
+    uint8_t inquiry_data[96];
+    uint8_t vpd_page83[64];
+    uint8_t not_supported;
+    uint8_t scsi_dev_type;
+    uint8_t connected_port_bitmap;
+    uint8_t device_speed;
+    uint32_t media_err_count;
+    uint32_t other_err_count;
+    uint32_t pred_fail_count;
+    uint32_t last_pred_fail_event_seq_num;
+    uint16_t fw_state;
+    uint8_t disable_for_removal;
+    uint8_t link_speed;
+    union mfi_pd_ddf_type state;
+    struct {
+        uint8_t count;
+        uint8_t is_path_broken;
+        uint8_t reserved[6];
+        uint64_t sas_addr[4];
+    } path_info;
+    uint64_t raw_size;
+    uint64_t non_coerced_size;
+    uint64_t coerced_size;
+    uint16_t encl_device_id;
+    uint8_t encl_index;
+    uint8_t slot_number;
+    struct mfi_pd_progress prog_info;
+    uint8_t bad_block_table_full;
+    uint8_t unusable_in_current_config;
+    uint8_t vpd_page83_ext[64];
+    uint8_t reserved[512-358];
+} __attribute__ ((packed));
+
+struct mfi_pd_address {
+    uint16_t device_id;
+    uint16_t encl_device_id;
+    uint8_t encl_index;
+    uint8_t slot_number;
+    uint8_t scsi_dev_type;
+    uint8_t connect_port_bitmap;
+    uint64_t sas_addr[2];
+} __attribute__ ((packed));
+
+#define MFI_MAX_SYS_PDS 240
+struct mfi_pd_list {
+    uint32_t size;
+    uint32_t count;
+    struct mfi_pd_address addr[MFI_MAX_SYS_PDS];
+} __attribute__ ((packed));
+
+union mfi_ld_ref {
+    struct {
+        uint8_t target_id;
+        uint8_t reserved;
+        uint16_t seq;
+    } v;
+    uint32_t ref;
+} __attribute__ ((packed));
+
+struct mfi_ld_list {
+    uint32_t ld_count;
+    uint32_t reserved1;
+    struct {
+        union mfi_ld_ref ld;
+        uint8_t state;
+        uint8_t reserved2[3];
+        uint64_t size;
+    } ld_list[MFI_MAX_LD];
+} __attribute__ ((packed));
+
+enum mfi_ld_access {
+    MFI_LD_ACCESS_RW =          0,
+    MFI_LD_ACCSSS_RO =          2,
+    MFI_LD_ACCESS_BLOCKED =     3,
+};
+#define MFI_LD_ACCESS_MASK      3
+
+enum mfi_ld_state {
+    MFI_LD_STATE_OFFLINE =              0,
+    MFI_LD_STATE_PARTIALLY_DEGRADED =   1,
+    MFI_LD_STATE_DEGRADED =             2,
+    MFI_LD_STATE_OPTIMAL =              3
+};
+
+enum mfi_syspd_state {
+    MFI_PD_STATE_UNCONFIGURED_GOOD =    0x00,
+    MFI_PD_STATE_UNCONFIGURED_BAD =     0x01,
+    MFI_PD_STATE_HOT_SPARE =            0x02,
+    MFI_PD_STATE_OFFLINE =              0x10,
+    MFI_PD_STATE_FAILED =               0x11,
+    MFI_PD_STATE_REBUILD =              0x14,
+    MFI_PD_STATE_ONLINE =               0x18,
+    MFI_PD_STATE_COPYBACK =             0x20,
+    MFI_PD_STATE_SYSTEM =               0x40
+};
+
+struct mfi_ld_props {
+    union mfi_ld_ref ld;
+    char name[16];
+    uint8_t default_cache_policy;
+    uint8_t access_policy;
+    uint8_t disk_cache_policy;
+    uint8_t current_cache_policy;
+    uint8_t no_bgi;
+    uint8_t reserved[7];
+} __attribute__ ((packed));
+
+struct mfi_ld_params {
+    uint8_t primary_raid_level;
+    uint8_t raid_level_qualifier;
+    uint8_t secondary_raid_level;
+    uint8_t stripe_size;
+    uint8_t num_drives;
+    uint8_t span_depth;
+    uint8_t state;
+    uint8_t init_state;
+    uint8_t is_consistent;
+    uint8_t reserved[23];
+} __attribute__ ((packed));
+
+struct mfi_ld_progress {
+    uint32_t            active;
+#define MFI_LD_PROGRESS_CC      (1<<0)
+#define MFI_LD_PROGRESS_BGI     (1<<1)
+#define MFI_LD_PROGRESS_FGI     (1<<2)
+#define MFI_LD_PORGRESS_RECON   (1<<3)
+    struct mfi_progress cc;
+    struct mfi_progress bgi;
+    struct mfi_progress fgi;
+    struct mfi_progress recon;
+    struct mfi_progress reserved[4];
+} __attribute__ ((packed));
+
+struct mfi_span {
+    uint64_t start_block;
+    uint64_t num_blocks;
+    uint16_t array_ref;
+    uint8_t reserved[6];
+} __attribute__ ((packed));
+
+#define MFI_MAX_SPAN_DEPTH      8
+struct mfi_ld_config {
+    struct mfi_ld_props properties;
+    struct mfi_ld_params params;
+    struct mfi_span span[MFI_MAX_SPAN_DEPTH];
+} __attribute__ ((packed));
+
+struct mfi_ld_info {
+    struct mfi_ld_config ld_config;
+    uint64_t size;
+    struct mfi_ld_progress progress;
+    uint16_t cluster_owner;
+    uint8_t reconstruct_active;
+    uint8_t reserved1[1];
+    uint8_t vpd_page83[64];
+    uint8_t reserved2[16];
+} __attribute__ ((packed));
+
+union mfi_spare_type {
+    uint8_t flags;
+#define MFI_SPARE_IS_DEDICATED (1 << 0)
+#define MFI_SPARE_IS_REVERTABLE (1 << 1)
+#define MFI_SPARE_IS_ENCL_AFFINITY (1 << 2)
+    uint8_t type;
+} __attribute__ ((packed));
+
+#define MFI_MAX_ARRAYS 16
+struct mfi_spare {
+    union mfi_pd_ref ref;
+    union mfi_spare_type spare_type;
+    uint8_t reserved[2];
+    uint8_t array_count;
+    uint16_t array_refd[MFI_MAX_ARRAYS];
+} __attribute__ ((packed));
+
+#define MFI_MAX_ROW_SIZE 32
+struct mfi_array {
+    uint64_t size;
+    uint8_t num_drives;
+    uint8_t reserved;
+    uint16_t array_ref;
+    uint8_t pad[20];
+    struct {
+        union mfi_pd_ref ref;
+        uint16_t fw_state; /* enum mfi_syspd_state */
+        struct {
+            uint8_t pd;
+            uint8_t slot;
+        } encl;
+    } pd[MFI_MAX_ROW_SIZE];
+} __attribute__ ((packed));
+
+struct mfi_config_data {
+    uint32_t size;
+    uint16_t array_count;
+    uint16_t array_size;
+    uint16_t log_drv_count;
+    uint16_t log_drv_size;
+    uint16_t spares_count;
+    uint16_t spares_size;
+    uint8_t reserved[16];
+    /*
+      struct mfi_array  array[];
+      struct mfi_ld_config ld[];
+      struct mfi_spare  spare[];
+    */
+} __attribute__ ((packed));
+
+#define MFI_SCSI_MAX_TARGETS  128
+#define MFI_SCSI_MAX_LUNS       8
+#define MFI_SCSI_INITIATOR_ID 255
+#define MFI_SCSI_MAX_CMDS       8
+#define MFI_SCSI_MAX_CDB_LEN   16
+
+#endif /* MFI_REG_H */
diff --git a/hw/pci_ids.h b/hw/pci_ids.h
index 649e6b379d..b4801d2168 100644
--- a/hw/pci_ids.h
+++ b/hw/pci_ids.h
@@ -15,6 +15,7 @@
 
 #define PCI_CLASS_STORAGE_SCSI           0x0100
 #define PCI_CLASS_STORAGE_IDE            0x0101
+#define PCI_CLASS_STORAGE_RAID           0x0104
 #define PCI_CLASS_STORAGE_SATA           0x0106
 #define PCI_CLASS_STORAGE_OTHER          0x0180
 
@@ -47,6 +48,7 @@
 
 #define PCI_VENDOR_ID_LSI_LOGIC          0x1000
 #define PCI_DEVICE_ID_LSI_53C895A        0x0012
+#define PCI_DEVICE_ID_LSI_SAS1078        0x0060
 
 #define PCI_VENDOR_ID_DEC                0x1011
 #define PCI_DEVICE_ID_DEC_21154          0x0026
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 14e2f730b8..5ad1013be1 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -734,20 +734,16 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     switch (buf[0] >> 5) {
     case 0:
         cmd->xfer = buf[4];
-        cmd->len = 6;
         break;
     case 1:
     case 2:
         cmd->xfer = lduw_be_p(&buf[7]);
-        cmd->len = 10;
         break;
     case 4:
         cmd->xfer = ldl_be_p(&buf[10]) & 0xffffffffULL;
-        cmd->len = 16;
         break;
     case 5:
         cmd->xfer = ldl_be_p(&buf[6]) & 0xffffffffULL;
-        cmd->len = 12;
         break;
     default:
         return -1;
@@ -771,11 +767,9 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
     case SYNCHRONIZE_CACHE_16:
     case LOCATE_16:
     case LOCK_UNLOCK_CACHE:
-    case LOAD_UNLOAD:
     case SET_CD_SPEED:
     case SET_LIMITS:
     case WRITE_LONG_10:
-    case MOVE_MEDIUM:
     case UPDATE_BLOCK:
     case RESERVE_TRACK:
     case SET_READ_AHEAD:
@@ -885,7 +879,6 @@ static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *bu
     case READ_REVERSE:
     case RECOVER_BUFFERED_DATA:
     case WRITE_6:
-        cmd->len = 6;
         cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
         if (buf[1] & 0x01) { /* fixed */
             cmd->xfer *= dev->blocksize;
@@ -895,22 +888,34 @@ static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *bu
     case READ_REVERSE_16:
     case VERIFY_16:
     case WRITE_16:
-        cmd->len = 16;
         cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
         if (buf[1] & 0x01) { /* fixed */
             cmd->xfer *= dev->blocksize;
         }
         break;
     case REWIND:
-    case START_STOP:
-        cmd->len = 6;
+    case LOAD_UNLOAD:
         cmd->xfer = 0;
         break;
     case SPACE_16:
         cmd->xfer = buf[13] | (buf[12] << 8);
         break;
     case READ_POSITION:
-        cmd->xfer = buf[8] | (buf[7] << 8);
+        switch (buf[1] & 0x1f) /* operation code */ {
+        case SHORT_FORM_BLOCK_ID:
+        case SHORT_FORM_VENDOR_SPECIFIC:
+            cmd->xfer = 20;
+            break;
+        case LONG_FORM:
+            cmd->xfer = 32;
+            break;
+        case EXTENDED_FORM:
+            cmd->xfer = buf[8] | (buf[7] << 8);
+            break;
+        default:
+            return -1;
+        }
+
         break;
     case FORMAT_UNIT:
         cmd->xfer = buf[4] | (buf[3] << 8);
@@ -922,6 +927,29 @@ static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *bu
     return 0;
 }
 
+static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
+{
+    switch (buf[0]) {
+    /* medium changer commands */
+    case EXCHANGE_MEDIUM:
+    case INITIALIZE_ELEMENT_STATUS:
+    case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
+    case MOVE_MEDIUM:
+    case POSITION_TO_ELEMENT:
+        cmd->xfer = 0;
+        break;
+    case READ_ELEMENT_STATUS:
+        cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
+        break;
+
+    /* generic commands */
+    default:
+        return scsi_req_length(cmd, dev, buf);
+    }
+    return 0;
+}
+
+
 static void scsi_cmd_xfer_mode(SCSICommand *cmd)
 {
     if (!cmd->xfer) {
@@ -1001,11 +1029,36 @@ int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
 {
     int rc;
 
-    if (dev->type == TYPE_TAPE) {
+    switch (buf[0] >> 5) {
+    case 0:
+        cmd->len = 6;
+        break;
+    case 1:
+    case 2:
+        cmd->len = 10;
+        break;
+    case 4:
+        cmd->len = 16;
+        break;
+    case 5:
+        cmd->len = 12;
+        break;
+    default:
+        return -1;
+    }
+
+    switch (dev->type) {
+    case TYPE_TAPE:
         rc = scsi_req_stream_length(cmd, dev, buf);
-    } else {
+        break;
+    case TYPE_MEDIUM_CHANGER:
+        rc = scsi_req_medium_changer_length(cmd, dev, buf);
+        break;
+    default:
         rc = scsi_req_length(cmd, dev, buf);
+        break;
     }
+
     if (rc != 0)
         return rc;
 
@@ -1183,7 +1236,8 @@ static const char *scsi_command_name(uint8_t cmd)
         [ REQUEST_SENSE            ] = "REQUEST_SENSE",
         [ FORMAT_UNIT              ] = "FORMAT_UNIT",
         [ READ_BLOCK_LIMITS        ] = "READ_BLOCK_LIMITS",
-        [ REASSIGN_BLOCKS          ] = "REASSIGN_BLOCKS",
+        [ REASSIGN_BLOCKS          ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
+        /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
         [ READ_6                   ] = "READ_6",
         [ WRITE_6                  ] = "WRITE_6",
         [ SET_CAPACITY             ] = "SET_CAPACITY",
@@ -1200,14 +1254,16 @@ static const char *scsi_command_name(uint8_t cmd)
         [ COPY                     ] = "COPY",
         [ ERASE                    ] = "ERASE",
         [ MODE_SENSE               ] = "MODE_SENSE",
-        [ START_STOP               ] = "START_STOP",
+        [ START_STOP               ] = "START_STOP/LOAD_UNLOAD",
+        /* LOAD_UNLOAD and START_STOP use the same operation code */
         [ RECEIVE_DIAGNOSTIC       ] = "RECEIVE_DIAGNOSTIC",
         [ SEND_DIAGNOSTIC          ] = "SEND_DIAGNOSTIC",
         [ ALLOW_MEDIUM_REMOVAL     ] = "ALLOW_MEDIUM_REMOVAL",
         [ READ_CAPACITY_10         ] = "READ_CAPACITY_10",
         [ READ_10                  ] = "READ_10",
         [ WRITE_10                 ] = "WRITE_10",
-        [ SEEK_10                  ] = "SEEK_10",
+        [ SEEK_10                  ] = "SEEK_10/POSITION_TO_ELEMENT",
+        /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
         [ WRITE_VERIFY_10          ] = "WRITE_VERIFY_10",
         [ VERIFY_10                ] = "VERIFY_10",
         [ SEARCH_HIGH              ] = "SEARCH_HIGH",
@@ -1218,7 +1274,8 @@ static const char *scsi_command_name(uint8_t cmd)
         /* READ_POSITION and PRE_FETCH use the same operation code */
         [ SYNCHRONIZE_CACHE        ] = "SYNCHRONIZE_CACHE",
         [ LOCK_UNLOCK_CACHE        ] = "LOCK_UNLOCK_CACHE",
-        [ READ_DEFECT_DATA         ] = "READ_DEFECT_DATA",
+        [ READ_DEFECT_DATA         ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
+        /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
         [ MEDIUM_SCAN              ] = "MEDIUM_SCAN",
         [ COMPARE                  ] = "COMPARE",
         [ COPY_VERIFY              ] = "COPY_VERIFY",
@@ -1263,6 +1320,7 @@ static const char *scsi_command_name(uint8_t cmd)
         [ REPORT_LUNS              ] = "REPORT_LUNS",
         [ BLANK                    ] = "BLANK",
         [ MOVE_MEDIUM              ] = "MOVE_MEDIUM",
+        [ EXCHANGE_MEDIUM          ] = "EXCHANGE MEDIUM",
         [ LOAD_UNLOAD              ] = "LOAD_UNLOAD",
         [ READ_12                  ] = "READ_12",
         [ WRITE_12                 ] = "WRITE_12",
@@ -1389,7 +1447,7 @@ void scsi_req_complete(SCSIRequest *req, int status)
     assert(req->status == -1);
     req->status = status;
 
-    assert(req->sense_len < sizeof(req->sense));
+    assert(req->sense_len <= sizeof(req->sense));
     if (status == GOOD) {
         req->sense_len = 0;
     }
diff --git a/hw/scsi-defs.h b/hw/scsi-defs.h
index 219c84dfb1..8a73f745ba 100644
--- a/hw/scsi-defs.h
+++ b/hw/scsi-defs.h
@@ -29,6 +29,7 @@
 #define REQUEST_SENSE         0x03
 #define FORMAT_UNIT           0x04
 #define READ_BLOCK_LIMITS     0x05
+#define INITIALIZE_ELEMENT_STATUS 0x07
 #define REASSIGN_BLOCKS       0x07
 #define READ_6                0x08
 #define WRITE_6               0x0a
@@ -44,6 +45,7 @@
 #define COPY                  0x18
 #define ERASE                 0x19
 #define MODE_SENSE            0x1a
+#define LOAD_UNLOAD           0x1b
 #define START_STOP            0x1b
 #define RECEIVE_DIAGNOSTIC    0x1c
 #define SEND_DIAGNOSTIC       0x1d
@@ -53,6 +55,7 @@
 #define WRITE_10              0x2a
 #define SEEK_10               0x2b
 #define LOCATE_10             0x2b
+#define POSITION_TO_ELEMENT   0x2b
 #define WRITE_VERIFY_10       0x2e
 #define VERIFY_10             0x2f
 #define SEARCH_HIGH           0x30
@@ -63,6 +66,7 @@
 #define READ_POSITION         0x34
 #define SYNCHRONIZE_CACHE     0x35
 #define LOCK_UNLOCK_CACHE     0x36
+#define INITIALIZE_ELEMENT_STATUS_WITH_RANGE 0x37
 #define READ_DEFECT_DATA      0x37
 #define MEDIUM_SCAN           0x38
 #define COMPARE               0x39
@@ -82,6 +86,7 @@
 #define GET_EVENT_STATUS_NOTIFICATION 0x4a
 #define LOG_SELECT            0x4c
 #define LOG_SENSE             0x4d
+#define READ_DISC_INFORMATION 0x51
 #define RESERVE_TRACK         0x53
 #define MODE_SELECT_10        0x55
 #define RESERVE_10            0x56
@@ -116,7 +121,7 @@
 #define MAINTENANCE_IN        0xa3
 #define MAINTENANCE_OUT       0xa4
 #define MOVE_MEDIUM           0xa5
-#define LOAD_UNLOAD           0xa6
+#define EXCHANGE_MEDIUM       0xa6
 #define SET_READ_AHEAD        0xa7
 #define READ_12               0xa8
 #define WRITE_12              0xaa
@@ -142,6 +147,14 @@
 #define SAI_READ_CAPACITY_16  0x10
 
 /*
+ * READ POSITION service action codes
+ */
+#define SHORT_FORM_BLOCK_ID  0x00
+#define SHORT_FORM_VENDOR_SPECIFIC 0x01
+#define LONG_FORM            0x06
+#define EXTENDED_FORM        0x08
+
+/*
  *  SAM Status codes
  */
 
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index ae2519458c..34336b1b58 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -67,6 +67,7 @@ struct SCSIDiskState
     bool media_changed;
     bool media_event;
     bool eject_request;
+    uint64_t wwn;
     QEMUBH *bh;
     char *version;
     char *serial;
@@ -522,6 +523,7 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
     int buflen = 0;
+    int start;
 
     if (req->cmd.buf[1] & 0x1) {
         /* Vital product data */
@@ -530,14 +532,14 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
         outbuf[buflen++] = s->qdev.type & 0x1f;
         outbuf[buflen++] = page_code ; // this page
         outbuf[buflen++] = 0x00;
+        outbuf[buflen++] = 0x00;
+        start = buflen;
 
         switch (page_code) {
         case 0x00: /* Supported page codes, mandatory */
         {
-            int pages;
             DPRINTF("Inquiry EVPD[Supported pages] "
                     "buffer size %zd\n", req->cmd.xfer);
-            pages = buflen++;
             outbuf[buflen++] = 0x00; // list of supported pages (this page)
             if (s->serial) {
                 outbuf[buflen++] = 0x80; // unit serial number
@@ -547,7 +549,6 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
                 outbuf[buflen++] = 0xb0; // block limits
                 outbuf[buflen++] = 0xb2; // thin provisioning
             }
-            outbuf[pages] = buflen - pages - 1; // number of pages
             break;
         }
         case 0x80: /* Device serial number, optional */
@@ -566,7 +567,6 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
 
             DPRINTF("Inquiry EVPD[Serial number] "
                     "buffer size %zd\n", req->cmd.xfer);
-            outbuf[buflen++] = l;
             memcpy(outbuf+buflen, s->serial, l);
             buflen += l;
             break;
@@ -584,14 +584,21 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
             DPRINTF("Inquiry EVPD[Device identification] "
                     "buffer size %zd\n", req->cmd.xfer);
 
-            outbuf[buflen++] = 4 + id_len;
             outbuf[buflen++] = 0x2; // ASCII
             outbuf[buflen++] = 0;   // not officially assigned
             outbuf[buflen++] = 0;   // reserved
             outbuf[buflen++] = id_len; // length of data following
-
             memcpy(outbuf+buflen, str, id_len);
             buflen += id_len;
+
+            if (s->wwn) {
+                outbuf[buflen++] = 0x1; // Binary
+                outbuf[buflen++] = 0x3; // NAA
+                outbuf[buflen++] = 0;   // reserved
+                outbuf[buflen++] = 8;
+                stq_be_p(&outbuf[buflen], s->wwn);
+                buflen += 8;
+            }
             break;
         }
         case 0xb0: /* block limits */
@@ -609,8 +616,7 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
                 return -1;
             }
             /* required VPD size with unmap support */
-            outbuf[3] = buflen = 0x3c;
-
+            buflen = 0x40;
             memset(outbuf + 4, 0, buflen - 4);
 
             /* optimal transfer length granularity */
@@ -632,7 +638,7 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
         }
         case 0xb2: /* thin provisioning */
         {
-            outbuf[3] = buflen = 8;
+            buflen = 8;
             outbuf[4] = 0;
             outbuf[5] = 0x60; /* write_same 10/16 supported */
             outbuf[6] = s->qdev.conf.discard_granularity ? 2 : 1;
@@ -643,6 +649,8 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
             return -1;
         }
         /* done with EVPD */
+        assert(buflen - start <= 255);
+        outbuf[start - 1] = buflen - start;
         return buflen;
     }
 
@@ -716,6 +724,39 @@ static inline bool media_is_cd(SCSIDiskState *s)
     return nb_sectors <= CD_MAX_SECTORS;
 }
 
+static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r,
+                                      uint8_t *outbuf)
+{
+    uint8_t type = r->req.cmd.buf[1] & 7;
+
+    if (s->qdev.type != TYPE_ROM) {
+        return -1;
+    }
+
+    /* Types 1/2 are only defined for Blu-Ray.  */
+    if (type != 0) {
+        scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
+        return -1;
+    }
+
+    memset(outbuf, 0, 34);
+    outbuf[1] = 32;
+    outbuf[2] = 0xe; /* last session complete, disc finalized */
+    outbuf[3] = 1;   /* first track on disc */
+    outbuf[4] = 1;   /* # of sessions */
+    outbuf[5] = 1;   /* first track of last session */
+    outbuf[6] = 1;   /* last track of last session */
+    outbuf[7] = 0x20; /* unrestricted use */
+    outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */
+    /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
+    /* 12-23: not meaningful for CD-ROM or DVD-ROM */
+    /* 24-31: disc bar code */
+    /* 32: disc application code */
+    /* 33: number of OPC tables */
+
+    return 34;
+}
+
 static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
                                    uint8_t *outbuf)
 {
@@ -1355,6 +1396,12 @@ static int scsi_disk_emulate_command(SCSIDiskReq *r)
             goto illegal_request;
         }
         break;
+    case READ_DISC_INFORMATION:
+        buflen = scsi_read_disc_information(s, r, outbuf);
+        if (buflen < 0) {
+            goto illegal_request;
+        }
+        break;
     case READ_DVD_STRUCTURE:
         buflen = scsi_read_dvd_structure(s, r, outbuf);
         if (buflen < 0) {
@@ -1482,6 +1529,7 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
     case ALLOW_MEDIUM_REMOVAL:
     case READ_CAPACITY_10:
     case READ_TOC:
+    case READ_DISC_INFORMATION:
     case READ_DVD_STRUCTURE:
     case GET_CONFIGURATION:
     case GET_EVENT_STATUS_NOTIFICATION:
@@ -1925,6 +1973,7 @@ static Property scsi_hd_properties[] = {
                     SCSI_DISK_F_REMOVABLE, false),
     DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
                     SCSI_DISK_F_DPOFUA, false),
+    DEFINE_PROP_HEX64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -1969,6 +2018,7 @@ static TypeInfo scsi_hd_info = {
 
 static Property scsi_cd_properties[] = {
     DEFINE_SCSI_DISK_PROPERTIES(),
+    DEFINE_PROP_HEX64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -2030,6 +2080,7 @@ static Property scsi_disk_properties[] = {
                     SCSI_DISK_F_REMOVABLE, false),
     DEFINE_PROP_BIT("dpofua", SCSIDiskState, features,
                     SCSI_DISK_F_DPOFUA, false),
+    DEFINE_PROP_HEX64("wwn", SCSIDiskState, wwn, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index d856d23b3b..8d5106061e 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -400,12 +400,6 @@ static int scsi_generic_initfn(SCSIDevice *s)
         return -1;
     }
 
-    /* check we are really using a /dev/sg* file */
-    if (!bdrv_is_sg(s->conf.bs)) {
-        error_report("not /dev/sg*");
-        return -1;
-    }
-
     if (bdrv_get_on_error(s->conf.bs, 0) != BLOCK_ERR_STOP_ENOSPC) {
         error_report("Device doesn't support drive option werror");
         return -1;
@@ -416,8 +410,11 @@ static int scsi_generic_initfn(SCSIDevice *s)
     }
 
     /* check we are using a driver managing SG_IO (version 3 and after */
-    if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0 ||
-        sg_version < 30000) {
+    if (bdrv_ioctl(s->conf.bs, SG_GET_VERSION_NUM, &sg_version) < 0) {
+        error_report("scsi generic interface not supported");
+        return -1;
+    }
+    if (sg_version < 30000) {
         error_report("scsi generic interface too old");
         return -1;
     }
diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c
index e1a767ea78..0a5ac40e2f 100644
--- a/hw/virtio-scsi.c
+++ b/hw/virtio-scsi.c
@@ -405,6 +405,10 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
     }
 }
 
+static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq)
+{
+}
+
 static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status,
                                          size_t resid)
 {
@@ -609,7 +613,7 @@ VirtIODevice *virtio_scsi_init(DeviceState *dev, VirtIOSCSIConf *proxyconf)
     s->ctrl_vq = virtio_add_queue(&s->vdev, VIRTIO_SCSI_VQ_SIZE,
                                    virtio_scsi_handle_ctrl);
     s->event_vq = virtio_add_queue(&s->vdev, VIRTIO_SCSI_VQ_SIZE,
-                                   NULL);
+                                   virtio_scsi_handle_event);
     for (i = 0; i < s->conf->num_queues; i++) {
         s->cmd_vqs[i] = virtio_add_queue(&s->vdev, VIRTIO_SCSI_VQ_SIZE,
                                          virtio_scsi_handle_cmd);